version: perform additional revision release

Revert the minor version number to allow release of additional
revision release to fix some bugs that made it into the previous
release.

.readthedocs.yml

@@ -0,0 +1,20 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  builder: html
+  configuration: doc/conf.py
+
+# Build the docs in additional formats such as PDF and ePub
+formats: all
+
+# Set the version of Python and requirements required to build your docs
+python:
+   version: 3.7
+   install:
+     - requirements: doc/requirements.txt

README.rst

@@ -14,6 +14,16 @@ Installation
         sudo -H pip install devlib
 
 
+Dependencies
+------------
+
+``devlib`` should install all dependencies automatically, however if you run
+into issues please ensure you are using that latest version of pip.
+
+On some systems there may additional steps required to install the dependency
+``paramiko`` please consult the `module documentation <http://www.paramiko.org/installing.html>`_
+for more information.
+
 Usage
 -----
 

devlib/__init__.py

@@ -15,7 +15,7 @@
 
 from devlib.target import Target, LinuxTarget, AndroidTarget, LocalLinuxTarget, ChromeOsTarget
 from devlib.host import PACKAGE_BIN_DIRECTORY
-from devlib.exception import DevlibError, TargetError, HostError, TargetNotRespondingError
+from devlib.exception import DevlibError, DevlibTransientError, DevlibStableError, TargetError, TargetTransientError, TargetStableError, TargetNotRespondingError, HostError
 
 from devlib.module import Module, HardRestModule, BootModule, FlashModule
 from devlib.module import get_module, register_module
@@ -34,25 +34,35 @@ from devlib.instrument.hwmon import HwmonInstrument
 from devlib.instrument.monsoon import MonsoonInstrument
 from devlib.instrument.netstats import NetstatsInstrument
 from devlib.instrument.gem5power import Gem5PowerInstrument
+from devlib.instrument.baylibre_acme import (
+        BaylibreAcmeNetworkInstrument,
+        BaylibreAcmeXMLInstrument,
+        BaylibreAcmeLocalInstrument,
+        BaylibreAcmeInstrument,
+)
 
 from devlib.derived import DerivedMeasurements, DerivedMetric
 from devlib.derived.energy import DerivedEnergyMeasurements
 from devlib.derived.fps import DerivedGfxInfoStats, DerivedSurfaceFlingerStats
 
-from devlib.trace.ftrace import FtraceCollector
-from devlib.trace.serial_trace import SerialTraceCollector
+from devlib.collector.ftrace import FtraceCollector
+from devlib.collector.perf import PerfCollector
+from devlib.collector.serial_trace import SerialTraceCollector
+from devlib.collector.dmesg import DmesgCollector
+from devlib.collector.logcat import LogcatCollector
 
 from devlib.host import LocalConnection
 from devlib.utils.android import AdbConnection
 from devlib.utils.ssh import SshConnection, TelnetConnection, Gem5Connection
 
-from devlib.utils.version import get_commit as __get_commit
+from devlib.utils.version import (get_devlib_version as __get_devlib_version,
+                                  get_commit as __get_commit)
 
 
-__version__ = '1.0.0'
+__version__ = __get_devlib_version()
 
 __commit = __get_commit()
 if __commit:
-    __full_version__ = '{}-{}'.format(__version__, __commit)
+    __full_version__ = '{}+{}'.format(__version__, __commit)
 else:
     __full_version__ = __version__

devlib/bin/arm64/README.libtraceevent

@@ -0,0 +1,811 @@
+Sources of libtraceevent available at:
+Git commit: 9fe4ddef53288cff64886f75561ec46975a67c33
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=arm64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/arm64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtraceevent/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
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+
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+version number 2.1.]
+
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+
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+
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+
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+
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+
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+
+signature of Ty Coon, 1 April 1990
+Ty Coon, President of Vice
+That's all there is to it!
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
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+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
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+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
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+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
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+He X
+Hiltjo Posthuma
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+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
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+Pascal Cuoq
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+sin
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+Stefan O'Rear
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+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
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+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
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+
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+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
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+and labelled as such in comments in the individual source files. All
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+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
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+Copyright © 1999-2019, Arm Limited.
+
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+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
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+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
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+licensed under the standard MIT terms.
+
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+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
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+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
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+
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+John Spencer
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+
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+
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+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/arm64/README.libtracefs

@@ -0,0 +1,811 @@
+Sources of libtracefs available at:
+Git commit: 83323ad8695d3db29cfabdb57bf12a7683119dcb
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=arm64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/arm64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtracefs/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
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+
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+version number 2.1.]
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+
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+That's all there is to it!
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
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+
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+----------------------------------------------------------------------
+
+Authors/contributors include:
+
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+William Pitcock
+
+Portions of this software are derived from third-party works licensed
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+
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+
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+
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+Copyright © 1999-2019, Arm Limited.
+
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+
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+originally written by Solar Designer and placed into the public
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+
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+Valentin Ochs and is licensed under an MIT-style license.
+
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+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/arm64/README.trace-cmd

@@ -0,0 +1,667 @@
+Sources of trace-cmd available at:
+Git commit: 2191498dc35d629003591f727b604120fabbe02d
+Git repository: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=arm64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/arm64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of trace-cmd/LICENSES/GPL-2.0):
+
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU General Public License (GPL) version 2 only' use:
+    SPDX-License-Identifier: GPL-2.0
+  or
+    SPDX-License-Identifier: GPL-2.0-only
+  For 'GNU General Public License (GPL) version 2 or any later version' use:
+    SPDX-License-Identifier: GPL-2.0+
+  or
+    SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
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+Foundation's software and to any other program whose authors commit to
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+have the freedom to distribute copies of free software (and charge for
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+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
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+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
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+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
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+
+  Finally, any free program is threatened constantly by software
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+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
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+
+Activities other than copying, distribution and modification are not
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+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
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+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
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+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
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+
+  2. You may modify your copy or copies of the Program or any portion
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+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
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+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
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+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
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+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
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+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
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+    b) Accompany it with a written offer, valid for at least three
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+
+    c) Accompany it with the information you received as to the offer
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+    allowed only for noncommercial distribution and only if you
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+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
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+
+If distribution of executable or object code is made by offering
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+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
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+
+  5. You are not required to accept this License, since you have not
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+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
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+You are not responsible for enforcing compliance by third parties to
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+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+
+It is not the purpose of this section to induce you to infringe any
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+through that system in reliance on consistent application of that
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+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
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+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
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+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
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+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
+Ryan Fairfax
+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/armeabi/README.libtraceevent

@@ -0,0 +1,811 @@
+Sources of libtraceevent available at:
+Git commit: 9fe4ddef53288cff64886f75561ec46975a67c33
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=armeabi
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/armeabi
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtraceevent/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to
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+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
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+----------------------------------------------------------------------
+
+Authors/contributors include:
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+
+Portions of this software are derived from third-party works licensed
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+
+The TRE regular expression implementation (src/regex/reg* and
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+Copyright © 1993,2004 Sun Microsystems or
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+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/armeabi/README.libtracefs

@@ -0,0 +1,811 @@
+Sources of libtracefs available at:
+Git commit: 83323ad8695d3db29cfabdb57bf12a7683119dcb
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=armeabi
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/armeabi
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtracefs/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+
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+
+This library is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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+
+You should have received a copy of the GNU Lesser General Public License
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+information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+Yoyodyne, Inc., hereby disclaims all copyright interest in
+the library `Frob' (a library for tweaking knobs) written
+by James Random Hacker.
+
+signature of Ty Coon, 1 April 1990
+Ty Coon, President of Vice
+That's all there is to it!
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
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+
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+
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+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
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+Bartosz Brachaczek
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+Boris Brezillon
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+Daniel Micay
+Daniel Sabogal
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+David Carlier
+David Edelsohn
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+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
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+Felix Fietkau
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+Justin Cormack
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+Khem Raj
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+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
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+Michael Forney
+Mikhail Kremnyov
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+sin
+Solar Designer
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+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
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+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
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+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
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+
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+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
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+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
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+
+In addition, permission is hereby granted for all public header files
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+
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+
+This file previously contained text expressing a belief that most of
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+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/armeabi/README.trace-cmd

@@ -0,0 +1,667 @@
+Sources of trace-cmd available at:
+Git commit: 2191498dc35d629003591f727b604120fabbe02d
+Git repository: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=armeabi
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/armeabi
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of trace-cmd/LICENSES/GPL-2.0):
+
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU General Public License (GPL) version 2 only' use:
+    SPDX-License-Identifier: GPL-2.0
+  or
+    SPDX-License-Identifier: GPL-2.0-only
+  For 'GNU General Public License (GPL) version 2 or any later version' use:
+    SPDX-License-Identifier: GPL-2.0+
+  or
+    SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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+ of this license document, but changing it is not allowed.
+
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+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
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+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
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+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
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+
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+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+
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+
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+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
+Ryan Fairfax
+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/ppc64le/README.libtraceevent

@@ -0,0 +1,811 @@
+Sources of libtraceevent available at:
+Git commit: 9fe4ddef53288cff64886f75561ec46975a67c33
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=ppc64le
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/ppc64le
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtraceevent/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
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+
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+----------------------------------------------------------------------
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+----------------------------------------------------------------------
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+Authors/contributors include:
+
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+Copyright © 1999-2019, Arm Limited.
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+
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+obstacle to adoption, that text has been removed.

devlib/bin/ppc64le/README.libtracefs

@@ -0,0 +1,811 @@
+Sources of libtracefs available at:
+Git commit: 83323ad8695d3db29cfabdb57bf12a7683119dcb
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=ppc64le
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/ppc64le
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtracefs/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+
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+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
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+----------------------------------------------------------------------
+
+Authors/contributors include:
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+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
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+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
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+included version has been heavily modified by Rich Felker in 2012, in
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+Copyright © 1993,2004 Sun Microsystems or
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+Copyright © 2003-2009 Bruce D. Evans or
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+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
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+originally written by Solar Designer and placed into the public
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+
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+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/ppc64le/README.trace-cmd

@@ -0,0 +1,667 @@
+Sources of trace-cmd available at:
+Git commit: 2191498dc35d629003591f727b604120fabbe02d
+Git repository: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=ppc64le
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/ppc64le
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of trace-cmd/LICENSES/GPL-2.0):
+
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU General Public License (GPL) version 2 only' use:
+    SPDX-License-Identifier: GPL-2.0
+  or
+    SPDX-License-Identifier: GPL-2.0-only
+  For 'GNU General Public License (GPL) version 2 or any later version' use:
+    SPDX-License-Identifier: GPL-2.0+
+  or
+    SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
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+
+  We protect your rights with two steps: (1) copyright the software, and
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+
+  Also, for each author's protection and ours, we want to make certain
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+want its recipients to know that what they have is not the original, so
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+
+  Finally, any free program is threatened constantly by software
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+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
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+    years, to give any third party, for a charge no more than your
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+    allowed only for noncommercial distribution and only if you
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+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
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+
+  5. You are not required to accept this License, since you have not
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+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
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+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
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+
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+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+
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+
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+such claims; this section has the sole purpose of protecting the
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+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
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+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
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+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
+Ryan Fairfax
+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/scripts/shutils.in

@@ -1,5 +1,3 @@
-#!__DEVLIB_SHELL__
-
 CMD=$1
 shift
 
@@ -10,6 +8,8 @@ SED=${SED:-$BUSYBOX sed}
 CAT=${CAT:-$BUSYBOX cat}
 AWK=${AWK:-$BUSYBOX awk}
 PS=${PS:-$BUSYBOX ps}
+MOUNT=${MOUNT:-$BUSYBOX mount}
+PRINTF=${PRINTF:-$BUSYBOX printf}
 
 ################################################################################
 # CPUFrequency Utility Functions
@@ -40,9 +40,10 @@ cpufreq_get_all_governors() {
 }
 
 cpufreq_trace_all_frequencies() {
-	FREQS=$($CAT /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq)
-	CPU=0; for F in $FREQS; do
-		echo "cpu_frequency_devlib:        state=$F cpu_id=$CPU" > /sys/kernel/debug/tracing/trace_marker
+	local TRACEFS=$(get_tracefs_mount_point)
+	local FREQS=$($CAT /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq)
+	local CPU=0; for F in $FREQS; do
+		printf "%s\n" "cpu_frequency_devlib: state=$F cpu_id=$CPU" > $TRACEFS/trace_marker
 		CPU=$((CPU + 1))
 	done
 }
@@ -94,10 +95,15 @@ cpuidle_wake_all_cpus() {
 # FTrace Utility Functions
 ################################################################################
 
+get_tracefs_mount_point() {
+    get_fs_mount_point tracefs || $PRINTF "%s" '/sys/kernel/debug/tracing'
+}
+
 ftrace_get_function_stats() {
-    for CPU in $(ls /sys/kernel/debug/tracing/trace_stat | sed 's/function//'); do
+    local TRACEFS=$(get_tracefs_mount_point)
+    for CPU in $(ls $TRACEFS/trace_stat | sed 's/function//'); do
         REPLACE_STRING="s/  Function/\n  Function (CPU$CPU)/"
-        $CAT /sys/kernel/debug/tracing/trace_stat/function$CPU \
+        $CAT $TRACEFS/trace_stat/function$CPU \
             | sed "$REPLACE_STRING"
     done
 }
@@ -214,7 +220,7 @@ cgroups_freezer_set_state() {
 
     # Set the state of the freezer
     echo $STATE > $SYSFS_ENTRY
-    
+
     # And check it applied cleanly
     for i in `seq 1 10`; do
         [ $($CAT $SYSFS_ENTRY) = $STATE ] && exit 0
@@ -238,6 +244,19 @@ hotplug_online_all() {
     done
 }
 
+
+################################################################################
+# Scheduler
+################################################################################
+
+sched_get_kernel_attributes() {
+	MATCH=${1:-'.*'}
+	[ -d /proc/sys/kernel/ ] || exit 1
+	$GREP '' /proc/sys/kernel/sched_* | \
+		$SED -e 's|/proc/sys/kernel/sched_||' | \
+		$GREP -e "$MATCH"
+}
+
 ################################################################################
 # Misc
 ################################################################################
@@ -264,68 +283,70 @@ read_tree_values() {
     fi
 }
 
+read_tree_tgz_b64() {
+    BASEPATH=$1
+    MAXDEPTH=$2
+    TMPBASE=$3
+
+    if [ ! -e $BASEPATH ]; then
+        echo "ERROR: $BASEPATH does not exist"
+        exit 1
+    fi
+
+    cd $TMPBASE
+    TMP_FOLDER=$($BUSYBOX realpath $($BUSYBOX mktemp -d XXXXXX))
+
+    # 'tar' doesn't work as expected on debugfs, so copy the tree first to
+    # workaround the issue
+    cd $BASEPATH
+    for CUR_FILE in $($BUSYBOX find . -follow -type f -maxdepth $MAXDEPTH); do
+        $BUSYBOX cp --parents $CUR_FILE $TMP_FOLDER/ 2> /dev/null
+    done
+
+    cd $TMP_FOLDER
+    $BUSYBOX tar cz * 2>/dev/null | $BUSYBOX base64
+
+    # Clean-up the tmp folder since we won't need it any more
+    cd $TMPBASE
+    rm -rf $TMP_FOLDER
+}
+
+get_linux_system_id() {
+	kernel=$($BUSYBOX uname -r)
+	hardware=$($BUSYBOX ip a | $BUSYBOX grep 'link/ether' | $BUSYBOX sed 's/://g' | $BUSYBOX awk '{print $2}' | $BUSYBOX tr -d '\n')
+	filesystem=$(ls /dev/disk/by-uuid | $BUSYBOX tr '\n' '-' | $BUSYBOX sed 's/-$//')
+	echo "$hardware/$kernel/$filesystem"
+}
+
+get_android_system_id() {
+	kernel=$($BUSYBOX uname -r)
+	hardware=$($BUSYBOX ip a | $BUSYBOX grep 'link/ether' | $BUSYBOX sed 's/://g' | $BUSYBOX awk '{print $2}' | $BUSYBOX tr -d '\n')
+	filesystem=$(content query --uri content://settings/secure --projection value --where "name='android_id'" | $BUSYBOX cut -f2 -d=)
+	echo "$hardware/$kernel/$filesystem"
+}
+
+get_fs_mount_point() {
+    local path=$(LC_ALL=C $MOUNT -t "$1" | $SED -n "s/$1 on \(.*\) type $1 .*/\1/p;q")
+    if [ "$path" == "" ]; then
+        return 1
+    else
+        $PRINTF "%s" "$path"
+        return 0
+    fi
+}
+
 ################################################################################
 # Main Function Dispatcher
 ################################################################################
 
-case $CMD in
-cpufreq_set_all_frequencies)
-    cpufreq_set_all_frequencies $*
-    ;;
-cpufreq_get_all_frequencies)
-    cpufreq_get_all_frequencies
-    ;;
-cpufreq_set_all_governors)
-    cpufreq_set_all_governors $*
-    ;;
-cpufreq_get_all_governors)
-    cpufreq_get_all_governors
-    ;;
-cpufreq_trace_all_frequencies)
-    cpufreq_trace_all_frequencies $*
-    ;;
-devfreq_set_all_frequencies)
-    devfreq_set_all_frequencies $*
-    ;;
-devfreq_get_all_frequencies)
-    devfreq_get_all_frequencies
-    ;;
-devfreq_set_all_governors)
-    devfreq_set_all_governors $*
-    ;;
-devfreq_get_all_governors)
-    devfreq_get_all_governors
-    ;;
-cpuidle_wake_all_cpus)
-    cpuidle_wake_all_cpus $*
-    ;;
-cgroups_get_attributes)
-	cgroups_get_attributes $*
-	;;
-cgroups_run_into)
-    cgroups_run_into $*
-    ;;
-cgroups_tasks_move)
-	cgroups_tasks_move $*
-	;;
-cgroups_tasks_in)
-	cgroups_tasks_in $*
-	;;
-cgroups_freezer_set_state)
-	cgroups_freezer_set_state $*
-	;;
-ftrace_get_function_stats)
-    ftrace_get_function_stats
-    ;;
-hotplug_online_all)
-	hotplug_online_all
-    ;;
-read_tree_values)
-	read_tree_values $*
-    ;;
-*)
+# Use a function instead of a subshell so "exit 1" works as expected
+_command_not_found() {
     echo "Command [$CMD] not supported"
-    exit -1
-esac
+    exit 1
+}
+# Check the command exists
+type "$CMD" 2>&1 >/dev/null || _command_not_found
+
+"$CMD" "$@"
 
 # vim: tabstop=4 shiftwidth=4

devlib/bin/x86/README.libtraceevent

@@ -0,0 +1,811 @@
+Sources of libtraceevent available at:
+Git commit: 9fe4ddef53288cff64886f75561ec46975a67c33
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtraceevent/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to
+share and change it. By contrast, the GNU General Public Licenses are
+intended to guarantee your freedom to share and change free software--to
+make sure the software is free for all its users.
+
+This license, the Lesser General Public License, applies to some specially
+designated software packages--typically libraries--of the Free Software
+Foundation and other authors who decide to use it. You can use it too, but
+we suggest you first think carefully about whether this license or the
+ordinary General Public License is the better strategy to use in any
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+
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+distributors to deny you these rights or to ask you to surrender these
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+----------------------------------------------------------------------
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devlib/bin/x86/README.libtracefs

@@ -0,0 +1,811 @@
+Sources of libtracefs available at:
+Git commit: 83323ad8695d3db29cfabdb57bf12a7683119dcb
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtracefs/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
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+
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devlib/bin/x86/README.trace-cmd

@@ -0,0 +1,667 @@
+Sources of trace-cmd available at:
+Git commit: 2191498dc35d629003591f727b604120fabbe02d
+Git repository: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of trace-cmd/LICENSES/GPL-2.0):
+
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU General Public License (GPL) version 2 only' use:
+    SPDX-License-Identifier: GPL-2.0
+  or
+    SPDX-License-Identifier: GPL-2.0-only
+  For 'GNU General Public License (GPL) version 2 or any later version' use:
+    SPDX-License-Identifier: GPL-2.0+
+  or
+    SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
+Ryan Fairfax
+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
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+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/x86_64/README.libtraceevent

@@ -0,0 +1,811 @@
+Sources of libtraceevent available at:
+Git commit: 9fe4ddef53288cff64886f75561ec46975a67c33
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86_64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86_64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtraceevent/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
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+
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+
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+If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
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+
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+safest to attach them to the start of each source file to most effectively
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+"copyright" line and a pointer to where the full notice is found.
+
+one line to give the library's name and an idea of what it does.
+Copyright (C) year name of author
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at
+your option) any later version.
+
+This library is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Also add
+information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+Yoyodyne, Inc., hereby disclaims all copyright interest in
+the library `Frob' (a library for tweaking knobs) written
+by James Random Hacker.
+
+signature of Ty Coon, 1 April 1990
+Ty Coon, President of Vice
+That's all there is to it!
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
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+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/x86_64/README.libtracefs

@@ -0,0 +1,811 @@
+Sources of libtracefs available at:
+Git commit: 83323ad8695d3db29cfabdb57bf12a7683119dcb
+Git repository: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86_64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86_64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of libtracefs/LICENSES/LGPL-2.1):
+
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
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+
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+version number 2.1.]
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+
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+
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+
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+
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+That's all there is to it!
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
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+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
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+
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+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
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+Drew DeVault
+Emil Renner Berthing
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+Felix Fietkau
+Felix Janda
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+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
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+Michael Forney
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+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
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+
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+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
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+and labelled as such in comments in the individual source files. All
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+
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+license. It was taken from Bionic libc, used on Android.
+
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+Copyright © 1999-2019, Arm Limited.
+
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+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
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+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
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+
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+and later supplemented and integrated by John Spencer. It is licensed
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+
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+
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+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/bin/x86_64/README.trace-cmd

@@ -0,0 +1,667 @@
+Sources of trace-cmd available at:
+Git commit: 2191498dc35d629003591f727b604120fabbe02d
+Git repository: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+
+Build host info:
+
+NAME="Alpine Linux"
+ID=alpine
+VERSION_ID=3.13.6
+PRETTY_NAME="Alpine Linux v3.13"
+HOME_URL="https://alpinelinux.org/"
+BUG_REPORT_URL="https://bugs.alpinelinux.org/"
+
+
+Build recipe:
+
+export ARCH=x86_64
+export LISA_ARCH_ASSETS=/lisa/_assets/binaries/x86_64
+export LISA_HOME=''
+export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+#! /bin/bash
+
+ALPINE_VERSION=v3.13
+ALPINE_BUILD_DEPENDENCIES=(bash gcc git make linux-headers musl-dev pkgconfig)
+BROKEN_CROSS_COMPILATION=1
+
+download() {
+    # Official repo lacks some old version tags
+    # git clone git://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git
+    # So we use the personal one from Steven Rostedt
+    git clone git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+    # Latest available commit after 2.9.1.
+    # 2.9.1 itself require some fixes.
+    git -C trace-cmd checkout 2191498dc35d629003591f727b604120fabbe02d
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
+    git -C libtraceevent checkout libtraceevent-1.1.2
+
+    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
+    git -C libtracefs checkout libtracefs-1.0.2
+}
+
+build_libtraceevent() {
+    cd libtraceevent
+    make install
+}
+
+build_libtracefs() {
+    cd libtracefs
+    make install
+}
+
+build_tracecmd() {
+    # Disable libaudit, to limit the amount of dependencies
+    cd trace-cmd
+    make LDFLAGS="-static" NO_AUDIT=yes
+    strip "$TRACE_CMD_BIN"
+}
+
+# For trace-cmd v2.8.3
+TRACE_CMD_BIN=tracecmd/trace-cmd
+
+build() {
+    export PYTHON_VERS=python3
+
+    # Do this while waiting to have the build system working.
+    # https://bugzilla.kernel.org/show_bug.cgi?id=212149
+    # When fixed, replace this by what is adviced in trace-cmd/PACKAGING
+    export prefix="/usr"
+    export INSTALL_PATH="$(pwd)/installed_lib_dir"
+    INCLUDE_PKG_PATH="$(cut -d':' -f1 <<<$(pkg-config --variable pc_path pkg-config))"
+    export PKG_CONFIG="pkg-config --with-path $INSTALL_PATH/$INCLUDE_PKG_PATH --define-variable=prefix=$INSTALL_PATH/$prefix"
+    export CFLAGS="-g -Wall -I$INSTALL_PATH/$prefix/include"
+    export DESTDIR=$INSTALL_PATH
+
+    (build_libtraceevent) && (build_libtracefs) && (build_tracecmd)
+}
+
+install() {
+    cp -v trace-cmd/"$TRACE_CMD_BIN" "$LISA_ARCH_ASSETS/trace-cmd"
+
+    source "$LISA_HOME/tools/recipes/utils.sh"
+    # According to COPYING, the tools are distributed under GPL-2.0 whereas the
+    # libraries are under LGLP-2.1.
+    # Thus, use GPL-2.0 for trace-cmd and LGLP-2.1 for libtraceevent and
+    # libtracefs.
+    install_readme trace-cmd trace-cmd LICENSES/GPL-2.0
+    install_readme libtraceevent libtraceevent LICENSES/LGPL-2.1
+    install_readme libtracefs libtracefs LICENSES/LGPL-2.1
+}
+
+
+# Do not use libaudit unless there is a good reason, to avoid build issues in
+# non-necessary dependencies
+download_audit() {
+    git clone https://github.com/linux-audit/audit-userspace.git
+    git -C audit-userspace checkout master
+}
+
+build_audit() {
+    cd audit-userspace
+    ./autogen.sh
+    ./configure --disable-shared
+    make
+}
+
+
+The sources were distributed under the following licence (content of trace-cmd/LICENSES/GPL-2.0):
+
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU General Public License (GPL) version 2 only' use:
+    SPDX-License-Identifier: GPL-2.0
+  or
+    SPDX-License-Identifier: GPL-2.0-only
+  For 'GNU General Public License (GPL) version 2 or any later version' use:
+    SPDX-License-Identifier: GPL-2.0+
+  or
+    SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
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+		    GNU GENERAL PUBLIC LICENSE
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+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
+
+The sources were compiled with musl-libc (content of COPYRIGHT):
+
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+
+Authors/contributors include:
+
+A. Wilcox
+Ada Worcester
+Alex Dowad
+Alex Suykov
+Alexander Monakov
+Andre McCurdy
+Andrew Kelley
+Anthony G. Basile
+Aric Belsito
+Arvid Picciani
+Bartosz Brachaczek
+Benjamin Peterson
+Bobby Bingham
+Boris Brezillon
+Brent Cook
+Chris Spiegel
+Clément Vasseur
+Daniel Micay
+Daniel Sabogal
+Daurnimator
+David Carlier
+David Edelsohn
+Denys Vlasenko
+Dmitry Ivanov
+Dmitry V. Levin
+Drew DeVault
+Emil Renner Berthing
+Fangrui Song
+Felix Fietkau
+Felix Janda
+Gianluca Anzolin
+Hauke Mehrtens
+He X
+Hiltjo Posthuma
+Isaac Dunham
+Jaydeep Patil
+Jens Gustedt
+Jeremy Huntwork
+Jo-Philipp Wich
+Joakim Sindholt
+John Spencer
+Julien Ramseier
+Justin Cormack
+Kaarle Ritvanen
+Khem Raj
+Kylie McClain
+Leah Neukirchen
+Luca Barbato
+Luka Perkov
+M Farkas-Dyck (Strake)
+Mahesh Bodapati
+Markus Wichmann
+Masanori Ogino
+Michael Clark
+Michael Forney
+Mikhail Kremnyov
+Natanael Copa
+Nicholas J. Kain
+orc
+Pascal Cuoq
+Patrick Oppenlander
+Petr Hosek
+Petr Skocik
+Pierre Carrier
+Reini Urban
+Rich Felker
+Richard Pennington
+Ryan Fairfax
+Samuel Holland
+Segev Finer
+Shiz
+sin
+Solar Designer
+Stefan Kristiansson
+Stefan O'Rear
+Szabolcs Nagy
+Timo Teräs
+Trutz Behn
+Valentin Ochs
+Will Dietz
+William Haddon
+William Pitcock
+
+Portions of this software are derived from third-party works licensed
+under terms compatible with the above MIT license:
+
+The TRE regular expression implementation (src/regex/reg* and
+src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed
+under a 2-clause BSD license (license text in the source files). The
+included version has been heavily modified by Rich Felker in 2012, in
+the interests of size, simplicity, and namespace cleanliness.
+
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+
+The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008
+The Android Open Source Project and is licensed under a two-clause BSD
+license. It was taken from Bionic libc, used on Android.
+
+The AArch64 memcpy and memset code (src/string/aarch64/*) are
+Copyright © 1999-2019, Arm Limited.
+
+The implementation of DES for crypt (src/crypt/crypt_des.c) is
+Copyright © 1994 David Burren. It is licensed under a BSD license.
+
+The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was
+originally written by Solar Designer and placed into the public
+domain. The code also comes with a fallback permissive license for use
+in jurisdictions that may not recognize the public domain.
+
+The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011
+Valentin Ochs and is licensed under an MIT-style license.
+
+The x86_64 port was written by Nicholas J. Kain and is licensed under
+the standard MIT terms.
+
+The mips and microblaze ports were originally written by Richard
+Pennington for use in the ellcc project. The original code was adapted
+by Rich Felker for build system and code conventions during upstream
+integration. It is licensed under the standard MIT terms.
+
+The mips64 port was contributed by Imagination Technologies and is
+licensed under the standard MIT terms.
+
+The powerpc port was also originally written by Richard Pennington,
+and later supplemented and integrated by John Spencer. It is licensed
+under the standard MIT terms.
+
+All other files which have no copyright comments are original works
+produced specifically for use as part of this library, written either
+by Rich Felker, the main author of the library, or by one or more
+contibutors listed above. Details on authorship of individual files
+can be found in the git version control history of the project. The
+omission of copyright and license comments in each file is in the
+interest of source tree size.
+
+In addition, permission is hereby granted for all public header files
+(include/* and arch/*/bits/*) and crt files intended to be linked into
+applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit
+the copyright notice and permission notice otherwise required by the
+license, and to use these files without any requirement of
+attribution. These files include substantial contributions from:
+
+Bobby Bingham
+John Spencer
+Nicholas J. Kain
+Rich Felker
+Richard Pennington
+Stefan Kristiansson
+Szabolcs Nagy
+
+all of whom have explicitly granted such permission.
+
+This file previously contained text expressing a belief that most of
+the files covered by the above exception were sufficiently trivial not
+to be subject to copyright, resulting in confusion over whether it
+negated the permissions granted in the license. In the spirit of
+permissive licensing, and of not having licensing issues being an
+obstacle to adoption, that text has been removed.

devlib/collector/__init__.py

@@ -0,0 +1,75 @@
+#    Copyright 2015 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import logging
+
+from devlib.utils.types import caseless_string
+
+class CollectorBase(object):
+
+    def __init__(self, target):
+        self.target = target
+        self.logger = logging.getLogger(self.__class__.__name__)
+        self.output_path = None
+
+    def reset(self):
+        pass
+
+    def start(self):
+        pass
+
+    def stop(self):
+        pass
+
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
+        return CollectorOutput()
+
+    def __enter__(self):
+        self.reset()
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.stop()
+
+class CollectorOutputEntry(object):
+
+    path_kinds = ['file', 'directory']
+
+    def __init__(self, path, path_kind):
+        self.path = path
+
+        path_kind = caseless_string(path_kind)
+        if path_kind not in self.path_kinds:
+            msg = '{} is not a valid path_kind [{}]'
+            raise ValueError(msg.format(path_kind, ' '.join(self.path_kinds)))
+        self.path_kind = path_kind
+
+    def __str__(self):
+        return self.path
+
+    def __repr__(self):
+        return '<{} ({})>'.format(self.path, self.path_kind)
+
+    def __fspath__(self):
+        """Allow using with os.path operations"""
+        return self.path
+
+
+class CollectorOutput(list):
+    pass

devlib/collector/dmesg.py

@@ -0,0 +1,282 @@
+#    Copyright 2019 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import division
+import re
+from itertools import takewhile
+from datetime import timedelta
+
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
+from devlib.target import KernelConfigTristate
+from devlib.exception import TargetStableError
+from devlib.utils.misc import memoized
+
+
+class KernelLogEntry(object):
+    """
+    Entry of the kernel ring buffer.
+
+    :param facility: facility the entry comes from
+    :type facility: str
+
+    :param level: log level
+    :type level: str
+
+    :param timestamp: Timestamp of the entry
+    :type timestamp: datetime.timedelta
+
+    :param msg: Content of the entry
+    :type msg: str
+
+    :param line_nr: Line number at which this entry appeared in the ``dmesg``
+        output. Note that this is not guaranteed to be unique across collectors, as
+        the buffer can be cleared. The timestamp is the only reliable index.
+    :type line_nr: int
+    """
+
+    _TIMESTAMP_MSG_REGEX = re.compile(r'\[(.*?)\] (.*)')
+    _RAW_LEVEL_REGEX = re.compile(r'<([0-9]+)>(.*)')
+    _PRETTY_LEVEL_REGEX = re.compile(r'\s*([a-z]+)\s*:([a-z]+)\s*:\s*(.*)')
+
+    def __init__(self, facility, level, timestamp, msg, line_nr=0):
+        self.facility = facility
+        self.level = level
+        self.timestamp = timestamp
+        self.msg = msg
+        self.line_nr = line_nr
+
+    @classmethod
+    def from_str(cls, line, line_nr=0):
+        """
+        Parses a "dmesg --decode" output line, formatted as following:
+        kern  :err   : [3618282.310743] nouveau 0000:01:00.0: systemd-logind[988]: nv50cal_space: -16
+
+        Or the more basic output given by "dmesg -r":
+        <3>[3618282.310743] nouveau 0000:01:00.0: systemd-logind[988]: nv50cal_space: -16
+
+        """
+
+        def parse_raw_level(line):
+            match = cls._RAW_LEVEL_REGEX.match(line)
+            if not match:
+                raise ValueError('dmesg entry format not recognized: {}'.format(line))
+            level, remainder = match.groups()
+            levels = DmesgCollector.LOG_LEVELS
+            # BusyBox dmesg can output numbers that need to wrap around
+            level = levels[int(level) % len(levels)]
+            return level, remainder
+
+        def parse_pretty_level(line):
+            match = cls._PRETTY_LEVEL_REGEX.match(line)
+            facility, level, remainder = match.groups()
+            return facility, level, remainder
+
+        def parse_timestamp_msg(line):
+            match = cls._TIMESTAMP_MSG_REGEX.match(line)
+            timestamp, msg = match.groups()
+            timestamp = timedelta(seconds=float(timestamp.strip()))
+            return timestamp, msg
+
+        line = line.strip()
+
+        # If we can parse the raw prio directly, that is a basic line
+        try:
+            level, remainder = parse_raw_level(line)
+            facility = None
+        except ValueError:
+            facility, level, remainder = parse_pretty_level(line)
+
+        timestamp, msg = parse_timestamp_msg(remainder)
+
+        return cls(
+            facility=facility,
+            level=level,
+            timestamp=timestamp,
+            msg=msg.strip(),
+            line_nr=line_nr,
+        )
+
+    @classmethod
+    def from_dmesg_output(cls, dmesg_out):
+        """
+        Return a generator of :class:`KernelLogEntry` for each line of the
+        output of dmesg command.
+
+        .. note:: The same restrictions on the dmesg output format as for
+            :meth:`from_str` apply.
+        """
+        for i, line in enumerate(dmesg_out.splitlines()):
+            if line.strip():
+                yield cls.from_str(line, line_nr=i)
+
+    def __str__(self):
+        facility = self.facility + ': ' if self.facility else ''
+        return '{facility}{level}: [{timestamp}] {msg}'.format(
+            facility=facility,
+            level=self.level,
+            timestamp=self.timestamp.total_seconds(),
+            msg=self.msg,
+        )
+
+
+class DmesgCollector(CollectorBase):
+    """
+    Dmesg output collector.
+
+    :param level: Minimum log level to enable. All levels that are more
+        critical will be collected as well.
+    :type level: str
+
+    :param facility: Facility to record, see dmesg --help for the list.
+    :type level: str
+
+    :param empty_buffer: If ``True``, the kernel dmesg ring buffer will be
+        emptied before starting. Note that this will break nesting of collectors,
+        so it's not recommended unless it's really necessary.
+    :type empty_buffer: bool
+
+    .. warning:: If BusyBox dmesg is used, facility and level will be ignored,
+        and the parsed entries will also lack that information.
+    """
+
+    # taken from "dmesg --help"
+    # This list needs to be ordered by priority
+    LOG_LEVELS = [
+        "emerg",        # system is unusable
+        "alert",        # action must be taken immediately
+        "crit",         # critical conditions
+        "err",          # error conditions
+        "warn",         # warning conditions
+        "notice",       # normal but significant condition
+        "info",         # informational
+        "debug",        # debug-level messages
+    ]
+
+    def __init__(self, target, level=LOG_LEVELS[-1], facility='kern', empty_buffer=False):
+        super(DmesgCollector, self).__init__(target)
+
+        if not target.is_rooted:
+            raise TargetStableError('Cannot collect dmesg on non-rooted target')
+
+        self.output_path = None
+
+        if level not in self.LOG_LEVELS:
+            raise ValueError('level needs to be one of: {}'.format(
+                ', '.join(self.LOG_LEVELS)
+            ))
+        self.level = level
+
+        # Check if dmesg is the BusyBox one, or the one from util-linux in a
+        # recent version.
+        # Note: BusyBox dmesg does not support -h, but will still print the
+        # help with an exit code of 1
+        self.basic_dmesg = '--force-prefix' not in \
+                self.target.execute('dmesg -h', check_exit_code=False)
+        self.facility = facility
+        self.needs_root = bool(target.config.typed_config.get(
+            'CONFIG_SECURITY_DMESG_RESTRICT', KernelConfigTristate.NO))
+
+        self._begin_timestamp = None
+        self.empty_buffer = empty_buffer
+        self._dmesg_out = None
+
+    @property
+    def dmesg_out(self):
+        out = self._dmesg_out
+        if out is None:
+            return None
+        else:
+            try:
+                entry = self.entries[0]
+            except IndexError:
+                return ''
+            else:
+                i = entry.line_nr
+                return '\n'.join(out.splitlines()[i:])
+
+    @property
+    def entries(self):
+        return self._get_entries(self._dmesg_out, self._begin_timestamp)
+
+    @memoized
+    def _get_entries(self, dmesg_out, timestamp):
+        entries = KernelLogEntry.from_dmesg_output(dmesg_out)
+        entries = list(entries)
+        if timestamp is None:
+            return entries
+        else:
+            try:
+                first = entries[0]
+            except IndexError:
+                pass
+            else:
+                if first.timestamp > timestamp:
+                    msg = 'The dmesg ring buffer has ran out of memory or has been cleared and some entries have been lost'
+                    raise ValueError(msg)
+
+            return [
+                entry
+                for entry in entries
+                # Only select entries that are more recent than the one at last
+                # reset()
+                if entry.timestamp > timestamp
+            ]
+
+    def reset(self):
+        # If the buffer is emptied on start(), it does not matter as we will
+        # not end up with entries dating from before start()
+        if self.empty_buffer:
+            # Empty the dmesg ring buffer. This requires root in all cases
+            self.target.execute('dmesg -c', as_root=True)
+        else:
+            self.stop()
+            try:
+                entry = self.entries[-1]
+            except IndexError:
+                pass
+            else:
+                self._begin_timestamp = entry.timestamp
+
+        self._dmesg_out = None
+
+    def start(self):
+        self.reset()
+
+    def stop(self):
+        levels_list = list(takewhile(
+            lambda level: level != self.level,
+            self.LOG_LEVELS
+        ))
+        levels_list.append(self.level)
+        if self.basic_dmesg:
+            cmd = 'dmesg -r'
+        else:
+            cmd = 'dmesg --facility={facility} --force-prefix --decode --level={levels}'.format(
+                levels=','.join(levels_list),
+                facility=self.facility,
+            )
+
+        self._dmesg_out = self.target.execute(cmd, as_root=self.needs_root)
+
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
+        with open(self.output_path, 'wt') as f:
+            f.write((self.dmesg_out or '') + '\n')
+        return CollectorOutput([CollectorOutputEntry(self.output_path, 'file')])

devlib/collector/ftrace.py

@@ -20,11 +20,14 @@ import time
 import re
 import subprocess
 import sys
+import contextlib
+from pipes import quote
 
-from devlib.trace import TraceCollector
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
 from devlib.host import PACKAGE_BIN_DIRECTORY
-from devlib.exception import TargetError, HostError
-from devlib.utils.misc import check_output, which
+from devlib.exception import TargetStableError, HostError
+from devlib.utils.misc import check_output, which, memoized
 
 
 TRACE_MARKER_START = 'TRACE_MARKER_START'
@@ -48,56 +51,67 @@ TIMEOUT = 180
 CPU_RE = re.compile(r'  Function \(CPU([0-9]+)\)')
 STATS_RE = re.compile(r'([^ ]*) +([0-9]+) +([0-9.]+) us +([0-9.]+) us +([0-9.]+) us')
 
-class FtraceCollector(TraceCollector):
+class FtraceCollector(CollectorBase):
 
+    # pylint: disable=too-many-locals,too-many-branches,too-many-statements
     def __init__(self, target,
                  events=None,
                  functions=None,
+                 tracer=None,
+                 trace_children_functions=False,
                  buffer_size=None,
                  buffer_size_step=1000,
-                 tracing_path='/sys/kernel/debug/tracing',
+                 tracing_path=None,
                  automark=True,
                  autoreport=True,
                  autoview=False,
                  no_install=False,
                  strict=False,
                  report_on_target=False,
+                 trace_clock='local',
+                 saved_cmdlines_nr=4096,
                  ):
         super(FtraceCollector, self).__init__(target)
         self.events = events if events is not None else DEFAULT_EVENTS
         self.functions = functions
+        self.tracer = tracer
+        self.trace_children_functions = trace_children_functions
         self.buffer_size = buffer_size
-        self.buffer_size_step = buffer_size_step
-        self.tracing_path = tracing_path
+        self.tracing_path = self._resolve_tracing_path(target, tracing_path)
         self.automark = automark
         self.autoreport = autoreport
         self.autoview = autoview
+        self.strict = strict
         self.report_on_target = report_on_target
         self.target_output_file = target.path.join(self.target.working_directory, OUTPUT_TRACE_FILE)
         text_file_name = target.path.splitext(OUTPUT_TRACE_FILE)[0] + '.txt'
         self.target_text_file = target.path.join(self.target.working_directory, text_file_name)
+        self.output_path = None
         self.target_binary = None
         self.host_binary = None
         self.start_time = None
         self.stop_time = None
         self.event_string = None
         self.function_string = None
+        self.trace_clock = trace_clock
+        self.saved_cmdlines_nr = saved_cmdlines_nr
         self._reset_needed = True
 
+        # pylint: disable=bad-whitespace
         # Setup tracing paths
         self.available_events_file    = self.target.path.join(self.tracing_path, 'available_events')
         self.available_functions_file = self.target.path.join(self.tracing_path, 'available_filter_functions')
-        self.buffer_size_file         = self.target.path.join(self.tracing_path, 'buffer_size_kb')
         self.current_tracer_file      = self.target.path.join(self.tracing_path, 'current_tracer')
         self.function_profile_file    = self.target.path.join(self.tracing_path, 'function_profile_enabled')
         self.marker_file              = self.target.path.join(self.tracing_path, 'trace_marker')
         self.ftrace_filter_file       = self.target.path.join(self.tracing_path, 'set_ftrace_filter')
+        self.available_tracers_file  = self.target.path.join(self.tracing_path, 'available_tracers')
 
         self.host_binary = which('trace-cmd')
         self.kernelshark = which('kernelshark')
 
         if not self.target.is_rooted:
-            raise TargetError('trace-cmd instrument cannot be used on an unrooted device.')
+            raise TargetStableError('trace-cmd instrument cannot be used on an unrooted device.')
         if self.autoreport and not self.report_on_target and self.host_binary is None:
             raise HostError('trace-cmd binary must be installed on the host if autoreport=True.')
         if self.autoview and self.kernelshark is None:
@@ -107,69 +121,157 @@ class FtraceCollector(TraceCollector):
             self.target_binary = self.target.install(host_file)
         else:
             if not self.target.is_installed('trace-cmd'):
-                raise TargetError('No trace-cmd found on device and no_install=True is specified.')
+                raise TargetStableError('No trace-cmd found on device and no_install=True is specified.')
             self.target_binary = 'trace-cmd'
 
         # Validate required events to be traced
-        available_events = self.target.execute(
-                'cat {}'.format(self.available_events_file),
-                as_root=True).splitlines()
-        selected_events = []
-        for event in self.events:
-            # Convert globs supported by FTrace into valid regexp globs
-            _event = event
-            if event[0] != '*':
-                _event = '*' + event
-            event_re = re.compile(_event.replace('*', '.*'))
-            # Select events matching the required ones
-            if len(list(filter(event_re.match, available_events))) == 0:
-                message = 'Event [{}] not available for tracing'.format(event)
-                if strict:
-                    raise TargetError(message)
-                self.target.logger.warning(message)
+        def event_to_regex(event):
+            if not event.startswith('*'):
+                event = '*' + event
+
+            return re.compile(event.replace('*', '.*'))
+
+        def event_is_in_list(event, events):
+            return any(
+                event_to_regex(event).match(_event)
+                for _event in events
+            )
+
+        unavailable_events = [
+            event
+            for event in self.events
+            if not event_is_in_list(event, self.available_events)
+        ]
+        if unavailable_events:
+            message = 'Events not available for tracing: {}'.format(
+                ', '.join(unavailable_events)
+            )
+            if self.strict:
+                raise TargetStableError(message)
             else:
-                selected_events.append(event)
-        # If function profiling is enabled we always need at least one event.
-        # Thus, if not other events have been specified, try to add at least
-        # a tracepoint which is always available and possibly triggered few
-        # times.
-        if self.functions and len(selected_events) == 0:
-            selected_events = ['sched_wakeup_new']
-        self.event_string = _build_trace_events(selected_events)
+                self.target.logger.warning(message)
+
+        selected_events = sorted(set(self.events) - set(unavailable_events))
+
+        if self.tracer and self.tracer not in self.available_tracers:
+            raise TargetStableError('Unsupported tracer "{}". Available tracers: {}'.format(
+                self.tracer, ', '.join(self.available_tracers)))
 
         # Check for function tracing support
         if self.functions:
-            if not self.target.file_exists(self.function_profile_file):
-                raise TargetError('Function profiling not supported. '\
-                        'A kernel build with CONFIG_FUNCTION_PROFILER enable is required')
             # Validate required functions to be traced
-            available_functions = self.target.execute(
-                    'cat {}'.format(self.available_functions_file),
-                    as_root=True).splitlines()
             selected_functions = []
             for function in self.functions:
-                if function not in available_functions:
-                    message = 'Function [{}] not available for profiling'.format(function)
-                    if strict:
-                        raise TargetError(message)
+                if function not in self.available_functions:
+                    message = 'Function [{}] not available for tracing/profiling'.format(function)
+                    if self.strict:
+                        raise TargetStableError(message)
                     self.target.logger.warning(message)
                 else:
                     selected_functions.append(function)
-            self.function_string = _build_trace_functions(selected_functions)
+
+            # Function profiling
+            if self.tracer is None:
+                if not self.target.file_exists(self.function_profile_file):
+                    raise TargetStableError('Function profiling not supported. '\
+                                            'A kernel build with CONFIG_FUNCTION_PROFILER enable is required')
+                self.function_string = _build_trace_functions(selected_functions)
+                # If function profiling is enabled we always need at least one event.
+                # Thus, if not other events have been specified, try to add at least
+                # a tracepoint which is always available and possibly triggered few
+                # times.
+                if not selected_events:
+                    selected_events = ['sched_wakeup_new']
+
+            # Function tracing
+            elif self.tracer == 'function':
+                self.function_string = _build_graph_functions(selected_functions, False)
+
+            # Function graphing
+            elif self.tracer == 'function_graph':
+                self.function_string = _build_graph_functions(selected_functions, trace_children_functions)
+
+        self.event_string = _build_trace_events(selected_events)
+
+    @classmethod
+    def _resolve_tracing_path(cls, target, path):
+        if path is None:
+            return cls.find_tracing_path(target)
+        else:
+            return path
+
+    @classmethod
+    def find_tracing_path(cls, target):
+        fs_list = [
+            fs.mount_point
+            for fs in target.list_file_systems()
+            if fs.fs_type == 'tracefs'
+        ]
+        try:
+            return fs_list[0]
+        except IndexError:
+            # Default legacy value, when the kernel did not have a tracefs yet
+            return '/sys/kernel/debug/tracing'
+
+    @property
+    @memoized
+    def available_tracers(self):
+        """
+        List of ftrace tracers supported by the target's kernel.
+        """
+        return self.target.read_value(self.available_tracers_file).split(' ')
+
+    @property
+    def available_events(self):
+        """
+        List of ftrace events supported by the target's kernel.
+        """
+        return self.target.read_value(self.available_events_file).splitlines()
+
+    @property
+    @memoized
+    def available_functions(self):
+        """
+        List of functions whose tracing/profiling is supported by the target's kernel.
+        """
+        return self.target.read_value(self.available_functions_file).splitlines()
 
     def reset(self):
-        if self.buffer_size:
-            self._set_buffer_size()
         self.target.execute('{} reset'.format(self.target_binary),
                             as_root=True, timeout=TIMEOUT)
+        if self.functions:
+            self.target.write_value(self.function_profile_file, 0, verify=False)
         self._reset_needed = False
 
     def start(self):
         self.start_time = time.time()
         if self._reset_needed:
             self.reset()
-        self.target.execute('{} start {}'.format(self.target_binary, self.event_string),
-                            as_root=True)
+
+        if self.tracer is not None and 'function' in self.tracer:
+            tracecmd_functions = self.function_string
+        else:
+            tracecmd_functions = ''
+
+        tracer_string = '-p {}'.format(self.tracer) if self.tracer else ''
+
+        # Ensure kallsyms contains addresses if possible, so that function the
+        # collected trace contains enough data for pretty printing
+        with contextlib.suppress(TargetStableError):
+            self.target.write_value('/proc/sys/kernel/kptr_restrict', 0)
+
+        self.target.execute(
+            '{} start {buffer_size} {cmdlines_size} {clock} {events} {tracer} {functions}'.format(
+                self.target_binary,
+                events=self.event_string,
+                tracer=tracer_string,
+                functions=tracecmd_functions,
+                buffer_size='-b {}'.format(self.buffer_size) if self.buffer_size is not None else '',
+                clock='-C {}'.format(self.trace_clock) if self.trace_clock else '',
+                cmdlines_size='--cmdlines-size {}'.format(self.saved_cmdlines_nr) if self.saved_cmdlines_nr is not None else '',
+            ),
+            as_root=True,
+        )
         if self.automark:
             self.mark_start()
         if 'cpufreq' in self.target.modules:
@@ -179,7 +281,7 @@ class FtraceCollector(TraceCollector):
             self.logger.debug('Trace CPUIdle states')
             self.target.cpuidle.perturb_cpus()
         # Enable kernel function profiling
-        if self.functions:
+        if self.functions and self.tracer is None:
             self.target.execute('echo nop > {}'.format(self.current_tracer_file),
                                 as_root=True)
             self.target.execute('echo 0 > {}'.format(self.function_profile_file),
@@ -192,8 +294,8 @@ class FtraceCollector(TraceCollector):
 
     def stop(self):
         # Disable kernel function profiling
-        if self.functions:
-            self.target.execute('echo 1 > {}'.format(self.function_profile_file),
+        if self.functions and self.tracer is None:
+            self.target.execute('echo 0 > {}'.format(self.function_profile_file),
                                 as_root=True)
         if 'cpufreq' in self.target.modules:
             self.logger.debug('Trace CPUFreq frequencies')
@@ -205,9 +307,14 @@ class FtraceCollector(TraceCollector):
                             timeout=TIMEOUT, as_root=True)
         self._reset_needed = True
 
-    def get_trace(self, outfile):
-        if os.path.isdir(outfile):
-            outfile = os.path.join(outfile, os.path.basename(self.target_output_file))
+    def set_output(self, output_path):
+        if os.path.isdir(output_path):
+            output_path = os.path.join(output_path, os.path.basename(self.target_output_file))
+        self.output_path = output_path
+
+    def get_data(self):
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
         self.target.execute('{0} extract -o {1}; chmod 666 {1}'.format(self.target_binary,
                                                                        self.target_output_file),
                             timeout=TIMEOUT, as_root=True)
@@ -216,27 +323,32 @@ class FtraceCollector(TraceCollector):
         # Therefore timout for the pull command must also be adjusted
         # accordingly.
         pull_timeout = 10 * (self.stop_time - self.start_time)
-        self.target.pull(self.target_output_file, outfile, timeout=pull_timeout)
-        if not os.path.isfile(outfile):
+        self.target.pull(self.target_output_file, self.output_path, timeout=pull_timeout)
+        output = CollectorOutput()
+        if not os.path.isfile(self.output_path):
             self.logger.warning('Binary trace not pulled from device.')
         else:
+            output.append(CollectorOutputEntry(self.output_path, 'file'))
             if self.autoreport:
-                textfile = os.path.splitext(outfile)[0] + '.txt'
+                textfile = os.path.splitext(self.output_path)[0] + '.txt'
                 if self.report_on_target:
                     self.generate_report_on_target()
                     self.target.pull(self.target_text_file,
                                      textfile, timeout=pull_timeout)
                 else:
-                    self.report(outfile, textfile)
+                    self.report(self.output_path, textfile)
+                output.append(CollectorOutputEntry(textfile, 'file'))
             if self.autoview:
-                self.view(outfile)
+                self.view(self.output_path)
+        return output
 
     def get_stats(self, outfile):
-        if not self.functions:
+        if not (self.functions and self.tracer is None):
             return
 
         if os.path.isdir(outfile):
             outfile = os.path.join(outfile, OUTPUT_PROFILE_FILE)
+        # pylint: disable=protected-access
         output = self.target._execute_util('ftrace_get_function_stats',
                                             as_root=True)
 
@@ -264,7 +376,7 @@ class FtraceCollector(TraceCollector):
 
         self.logger.debug("FTrace stats output [%s]...", outfile)
         with open(outfile, 'w') as fh:
-           json.dump(function_stats, fh, indent=4)
+            json.dump(function_stats, fh, indent=4)
         self.logger.debug("FTrace function stats save in [%s]", outfile)
 
         return function_stats
@@ -278,9 +390,9 @@ class FtraceCollector(TraceCollector):
             process = subprocess.Popen(command, stderr=subprocess.PIPE, shell=True)
             _, error = process.communicate()
             if sys.version_info[0] == 3:
-                error = error.decode(sys.stdout.encoding, 'replace')
+                error = error.decode(sys.stdout.encoding or 'utf-8', 'replace')
             if process.returncode:
-                raise TargetError('trace-cmd returned non-zero exit code {}'.format(process.returncode))
+                raise TargetStableError('trace-cmd returned non-zero exit code {}'.format(process.returncode))
             if error:
                 # logged at debug level, as trace-cmd always outputs some
                 # errors that seem benign.
@@ -317,29 +429,6 @@ class FtraceCollector(TraceCollector):
     def mark_stop(self):
         self.target.write_value(self.marker_file, TRACE_MARKER_STOP, verify=False)
 
-    def _set_buffer_size(self):
-        target_buffer_size = self.buffer_size
-        attempt_buffer_size = target_buffer_size
-        buffer_size = 0
-        floor = 1000 if target_buffer_size > 1000 else target_buffer_size
-        while attempt_buffer_size >= floor:
-            self.target.write_value(self.buffer_size_file, attempt_buffer_size, verify=False)
-            buffer_size = self.target.read_int(self.buffer_size_file)
-            if buffer_size == attempt_buffer_size:
-                break
-            else:
-                attempt_buffer_size -= self.buffer_size_step
-        if buffer_size == target_buffer_size:
-            return
-        while attempt_buffer_size < target_buffer_size:
-            attempt_buffer_size += self.buffer_size_step
-            self.target.write_value(self.buffer_size_file, attempt_buffer_size, verify=False)
-            buffer_size = self.target.read_int(self.buffer_size_file)
-            if attempt_buffer_size != buffer_size:
-                message = 'Failed to set trace buffer size to {}, value set was {}'
-                self.logger.warning(message.format(target_buffer_size, buffer_size))
-                break
-
 
 def _build_trace_events(events):
     event_string = ' '.join(['-e {}'.format(e) for e in events])
@@ -348,3 +437,10 @@ def _build_trace_events(events):
 def _build_trace_functions(functions):
     function_string = " ".join(functions)
     return function_string
+
+def _build_graph_functions(functions, trace_children_functions):
+    opt = 'g' if trace_children_functions else 'l'
+    return ' '.join(
+        '-{} {}'.format(opt, quote(f))
+        for f in functions
+    )

devlib/collector/logcat.py

@@ -14,19 +14,22 @@
 #
 
 import os
-import re
 import shutil
 
-from devlib.trace import TraceCollector
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
 from devlib.utils.android import LogcatMonitor
 
-class LogcatCollector(TraceCollector):
+class LogcatCollector(CollectorBase):
 
-    def __init__(self, target, regexps=None):
+    def __init__(self, target, regexps=None, logcat_format=None):
         super(LogcatCollector, self).__init__(target)
         self.regexps = regexps
+        self.logcat_format = logcat_format
+        self.output_path = None
         self._collecting = False
         self._prev_log = None
+        self._monitor = None
 
     def reset(self):
         """
@@ -45,12 +48,14 @@ class LogcatCollector(TraceCollector):
         """
         Start collecting logcat lines
         """
-        self._monitor = LogcatMonitor(self.target, self.regexps)
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
+        self._monitor = LogcatMonitor(self.target, self.regexps, logcat_format=self.logcat_format)
         if self._prev_log:
             # Append new data collection to previous collection
             self._monitor.start(self._prev_log)
         else:
-            self._monitor.start()
+            self._monitor.start(self.output_path)
 
         self._collecting = True
 
@@ -65,9 +70,10 @@ class LogcatCollector(TraceCollector):
         self._collecting = False
         self._prev_log = self._monitor.logfile
 
-    def get_trace(self, outfile):
-        """
-        Output collected logcat lines to designated file
-        """
-        # copy self._monitor.logfile to outfile
-        shutil.copy(self._monitor.logfile, outfile)
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
+        if self.output_path is None:
+            raise RuntimeError("No data collected.")
+        return CollectorOutput([CollectorOutputEntry(self.output_path, 'file')])

devlib/collector/perf.py

@@ -0,0 +1,280 @@
+#    Copyright 2018 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import os
+import re
+import time
+from past.builtins import basestring, zip
+
+from devlib.host import PACKAGE_BIN_DIRECTORY
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
+from devlib.utils.misc import ensure_file_directory_exists as _f
+
+
+PERF_STAT_COMMAND_TEMPLATE = '{binary} {command} {options} {events} {sleep_cmd} > {outfile} 2>&1 '
+PERF_REPORT_COMMAND_TEMPLATE= '{binary} report {options} -i {datafile} > {outfile} 2>&1 '
+PERF_REPORT_SAMPLE_COMMAND_TEMPLATE= '{binary} report-sample {options} -i {datafile} > {outfile} '
+PERF_RECORD_COMMAND_TEMPLATE= '{binary} record {options} {events} -o {outfile}'
+
+PERF_DEFAULT_EVENTS = [
+    'cpu-migrations',
+    'context-switches',
+]
+
+SIMPLEPERF_DEFAULT_EVENTS = [
+    'raw-cpu-cycles',
+    'raw-l1-dcache',
+    'raw-l1-dcache-refill',
+    'raw-br-mis-pred',
+    'raw-instruction-retired',
+]
+
+DEFAULT_EVENTS = {'perf':PERF_DEFAULT_EVENTS, 'simpleperf':SIMPLEPERF_DEFAULT_EVENTS}
+
+class PerfCollector(CollectorBase):
+    """
+    Perf is a Linux profiling with performance counters.
+    Simpleperf is an Android profiling tool with performance counters.
+
+    It is highly recomended to use perf_type = simpleperf when using this instrument
+    on android devices, since it recognises android symbols in record mode and is much more stable
+    when reporting record .data files. For more information see simpleperf documentation at:
+    https://android.googlesource.com/platform/system/extras/+/master/simpleperf/doc/README.md
+
+    Performance counters are CPU hardware registers that count hardware events
+    such as instructions executed, cache-misses suffered, or branches
+    mispredicted. They form a basis for profiling applications to trace dynamic
+    control flow and identify hotspots.
+
+    pref accepts options and events. If no option is given the default '-a' is
+    used. For events, the default events are migrations and cs for perf and raw-cpu-cycles,
+    raw-l1-dcache, raw-l1-dcache-refill, raw-instructions-retired. They both can
+    be specified in the config file.
+
+    Events must be provided as a list that contains them and they will look like
+    this ::
+
+        perf_events = ['migrations', 'cs']
+
+    Events can be obtained by typing the following in the command line on the
+    device ::
+
+        perf list
+        simpleperf list
+
+    Whereas options, they can be provided as a single string as following ::
+
+        perf_options = '-a -i'
+
+    Options can be obtained by running the following in the command line ::
+
+        man perf-stat
+    """
+
+    def __init__(self,
+                 target,
+                 perf_type='perf',
+                 command='stat',
+                 events=None,
+                 optionstring=None,
+                 report_options=None,
+                 run_report_sample=False,
+                 report_sample_options=None,
+                 labels=None,
+                 force_install=False):
+        super(PerfCollector, self).__init__(target)
+        self.force_install = force_install
+        self.labels = labels
+        self.report_options = report_options
+        self.run_report_sample = run_report_sample
+        self.report_sample_options = report_sample_options
+        self.output_path = None
+
+        # Validate parameters
+        if isinstance(optionstring, list):
+            self.optionstrings = optionstring
+        else:
+            self.optionstrings = [optionstring]
+        if perf_type in ['perf', 'simpleperf']:
+            self.perf_type = perf_type
+        else:
+            raise ValueError('Invalid perf type: {}, must be perf or simpleperf'.format(perf_type))
+        if not events:
+            self.events = DEFAULT_EVENTS[self.perf_type]
+        else:
+            self.events = events
+        if isinstance(self.events, basestring):
+            self.events = [self.events]
+        if not self.labels:
+            self.labels = ['perf_{}'.format(i) for i in range(len(self.optionstrings))]
+        if len(self.labels) != len(self.optionstrings):
+            raise ValueError('The number of labels must match the number of optstrings provided for perf.')
+        if command in ['stat', 'record']:
+            self.command = command
+        else:
+            raise ValueError('Unsupported perf command, must be stat or record')
+        if report_options and (command != 'record'):
+            raise ValueError('report_options specified, but command is not record')
+        if report_sample_options and (command != 'record'):
+            raise ValueError('report_sample_options specified, but command is not record')
+
+        self.binary = self.target.get_installed(self.perf_type)
+        if self.force_install or not self.binary:
+            self.binary = self._deploy_perf()
+
+        self._validate_events(self.events)
+
+        self.commands = self._build_commands()
+
+    def reset(self):
+        self.target.killall(self.perf_type, as_root=self.target.is_rooted)
+        self.target.remove(self.target.get_workpath('TemporaryFile*'))
+        for label in self.labels:
+            filepath = self._get_target_file(label, 'data')
+            self.target.remove(filepath)
+            filepath = self._get_target_file(label, 'rpt')
+            self.target.remove(filepath)
+            filepath = self._get_target_file(label, 'rptsamples')
+            self.target.remove(filepath)
+
+    def start(self):
+        for command in self.commands:
+            self.target.background(command, as_root=self.target.is_rooted)
+
+    def stop(self):
+        self.target.killall(self.perf_type, signal='SIGINT',
+                            as_root=self.target.is_rooted)
+        if self.perf_type == "perf" and self.command == "stat":
+            # perf doesn't transmit the signal to its sleep call so handled here:
+            self.target.killall('sleep', as_root=self.target.is_rooted)
+            # NB: we hope that no other "important" sleep is on-going
+
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
+
+        output = CollectorOutput()
+
+        for label in self.labels:
+            if self.command == 'record':
+                self._wait_for_data_file_write(label, self.output_path)
+                path = self._pull_target_file_to_host(label, 'rpt', self.output_path)
+                output.append(CollectorOutputEntry(path, 'file'))
+                if self.run_report_sample:
+                    report_samples_path = self._pull_target_file_to_host(label, 'rptsamples', self.output_path)
+                    output.append(CollectorOutputEntry(report_samples_path, 'file'))
+            else:
+                path = self._pull_target_file_to_host(label, 'out', self.output_path)
+                output.append(CollectorOutputEntry(path, 'file'))
+        return output
+
+    def _deploy_perf(self):
+        host_executable = os.path.join(PACKAGE_BIN_DIRECTORY,
+                                       self.target.abi, self.perf_type)
+        return self.target.install(host_executable)
+
+    def _get_target_file(self, label, extension):
+        return self.target.get_workpath('{}.{}'.format(label, extension))
+
+    def _build_commands(self):
+        commands = []
+        for opts, label in zip(self.optionstrings, self.labels):
+            if self.command == 'stat':
+                commands.append(self._build_perf_stat_command(opts, self.events, label))
+            else:
+                commands.append(self._build_perf_record_command(opts, label))
+        return commands
+
+    def _build_perf_stat_command(self, options, events, label):
+        event_string = ' '.join(['-e {}'.format(e) for e in events])
+        sleep_cmd = 'sleep 1000' if self.perf_type == 'perf' else ''
+        command = PERF_STAT_COMMAND_TEMPLATE.format(binary = self.binary,
+                                               command = self.command,
+                                               options = options or '',
+                                               events = event_string,
+                                               sleep_cmd = sleep_cmd,
+                                               outfile = self._get_target_file(label, 'out'))
+        return command
+
+    def _build_perf_report_command(self, report_options, label):
+        command = PERF_REPORT_COMMAND_TEMPLATE.format(binary=self.binary,
+                                                      options=report_options or '',
+                                                      datafile=self._get_target_file(label, 'data'),
+                                                      outfile=self._get_target_file(label, 'rpt'))
+        return command
+
+    def _build_perf_report_sample_command(self, label):
+        command = PERF_REPORT_SAMPLE_COMMAND_TEMPLATE.format(binary=self.binary,
+                                                      options=self.report_sample_options or '',
+                                                      datafile=self._get_target_file(label, 'data'),
+                                                      outfile=self._get_target_file(label, 'rptsamples'))
+        return command
+
+    def _build_perf_record_command(self, options, label):
+        event_string = ' '.join(['-e {}'.format(e) for e in self.events])
+        command = PERF_RECORD_COMMAND_TEMPLATE.format(binary=self.binary,
+                                                      options=options or '',
+                                                      events=event_string,
+                                                      outfile=self._get_target_file(label, 'data'))
+        return command
+
+    def _pull_target_file_to_host(self, label, extension, output_path):
+        target_file = self._get_target_file(label, extension)
+        host_relpath = os.path.basename(target_file)
+        host_file = _f(os.path.join(output_path, host_relpath))
+        self.target.pull(target_file, host_file)
+        return host_file
+
+    def _wait_for_data_file_write(self, label, output_path):
+        data_file_finished_writing = False
+        max_tries = 80
+        current_tries = 0
+        while not data_file_finished_writing:
+            files = self.target.execute('cd {} && ls'.format(self.target.get_workpath('')))
+            # Perf stores data in tempory files whilst writing to data output file. Check if they have been removed.
+            if 'TemporaryFile' in files and current_tries <= max_tries:
+                time.sleep(0.25)
+                current_tries += 1
+            else:
+                if current_tries >= max_tries:
+                    self.logger.warning('''writing {}.data file took longer than expected,
+                                        file may not have written correctly'''.format(label))
+                data_file_finished_writing = True
+        report_command = self._build_perf_report_command(self.report_options, label)
+        self.target.execute(report_command)
+        if self.run_report_sample:
+            report_sample_command = self._build_perf_report_sample_command(label)
+            self.target.execute(report_sample_command)
+
+    def _validate_events(self, events):
+        available_events_string = self.target.execute('{} list | {} cat'.format(self.perf_type, self.target.busybox))
+        available_events = available_events_string.splitlines()
+        for available_event in available_events:
+            if available_event == '':
+                continue
+            if 'OR' in available_event:
+                available_events.append(available_event.split('OR')[1])
+            available_events[available_events.index(available_event)] = available_event.split()[0].strip()
+        # Raw hex event codes can also be passed in that do not appear on perf/simpleperf list, prefixed with 'r'
+        raw_event_code_regex = re.compile(r"^r(0x|0X)?[A-Fa-f0-9]+$")
+        for event in events:
+            if event in available_events or re.match(raw_event_code_regex, event):
+                continue
+            else:
+                raise ValueError('Event: {} is not in available event list for {}'.format(event, self.perf_type))

devlib/collector/screencapture.py

@@ -19,13 +19,14 @@ import sys
 import threading
 import time
 
-from devlib.trace import TraceCollector
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
 from devlib.exception import WorkerThreadError
 
 
 class ScreenCapturePoller(threading.Thread):
 
-    def __init__(self, target, period, output_path=None, timeout=30):
+    def __init__(self, target, period, timeout=30):
         super(ScreenCapturePoller, self).__init__()
         self.target = target
         self.logger = logging.getLogger('screencapture')
@@ -36,11 +37,16 @@ class ScreenCapturePoller(threading.Thread):
         self.last_poll = 0
         self.daemon = True
         self.exc = None
+        self.output_path = None
+
+    def set_output(self, output_path):
         self.output_path = output_path
 
     def run(self):
         self.logger.debug('Starting screen capture polling')
         try:
+            if self.output_path is None:
+                raise RuntimeError("Output path was not set.")
             while True:
                 if self.stop_signal.is_set():
                     break
@@ -66,24 +72,33 @@ class ScreenCapturePoller(threading.Thread):
         self.target.capture_screen(os.path.join(self.output_path, "screencap_{ts}.png"))
 
 
-class ScreenCaptureCollector(TraceCollector):
+class ScreenCaptureCollector(CollectorBase):
 
-    def __init__(self, target, output_path=None, period=None):
+    def __init__(self, target, period=None):
         super(ScreenCaptureCollector, self).__init__(target)
         self._collecting = False
-        self.output_path = output_path
+        self.output_path = None
         self.period = period
         self.target = target
-        self._poller = ScreenCapturePoller(self.target, self.period,
-                                           self.output_path)
+
+    def set_output(self, output_path):
+        self.output_path = output_path
 
     def reset(self):
-        pass
+        self._poller = ScreenCapturePoller(self.target, self.period)
+
+    def get_data(self):
+        if self.output_path is None:
+            raise RuntimeError("No data collected.")
+        return CollectorOutput([CollectorOutputEntry(self.output_path, 'directory')])
 
     def start(self):
         """
         Start collecting the screenshots
         """
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
+        self._poller.set_output(self.output_path)
         self._poller.start()
         self._collecting = True
 

devlib/collector/serial_trace.py

@@ -13,15 +13,16 @@
 # limitations under the License.
 #
 
-from pexpect.exceptions import TIMEOUT
 import shutil
 from tempfile import NamedTemporaryFile
+from pexpect.exceptions import TIMEOUT
 
-from devlib.trace import TraceCollector
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
 from devlib.utils.serial_port import get_connection
 
 
-class SerialTraceCollector(TraceCollector):
+class SerialTraceCollector(CollectorBase):
 
     @property
     def collecting(self):
@@ -32,32 +33,35 @@ class SerialTraceCollector(TraceCollector):
         self.serial_port = serial_port
         self.baudrate = baudrate
         self.timeout = timeout
+        self.output_path = None
 
         self._serial_target = None
         self._conn = None
-        self._tmpfile = None
+        self._outfile_fh = None
         self._collecting = False
 
     def reset(self):
         if self._collecting:
             raise RuntimeError("reset was called whilst collecting")
 
-        if self._tmpfile:
-            self._tmpfile.close()
-            self._tmpfile = None
+        if self._outfile_fh:
+            self._outfile_fh.close()
+            self._outfile_fh = None
 
     def start(self):
         if self._collecting:
             raise RuntimeError("start was called whilst collecting")
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
 
-
-        self._tmpfile = NamedTemporaryFile()
-        self._tmpfile.write("-------- Starting serial logging --------\n")
+        self._outfile_fh = open(self.output_path, 'wb')
+        start_marker = "-------- Starting serial logging --------\n"
+        self._outfile_fh.write(start_marker.encode('utf-8'))
 
         self._serial_target, self._conn = get_connection(port=self.serial_port,
                                                          baudrate=self.baudrate,
                                                          timeout=self.timeout,
-                                                         logfile=self._tmpfile,
+                                                         logfile=self._outfile_fh,
                                                          init_dtr=0)
         self._collecting = True
 
@@ -76,17 +80,20 @@ class SerialTraceCollector(TraceCollector):
         self._serial_target.close()
         del self._conn
 
-        self._tmpfile.write("-------- Stopping serial logging --------\n")
+        stop_marker = "-------- Stopping serial logging --------\n"
+        self._outfile_fh.write(stop_marker.encode('utf-8'))
+        self._outfile_fh.flush()
+        self._outfile_fh.close()
+        self._outfile_fh = None
 
         self._collecting = False
 
-    def get_trace(self, outfile):
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
         if self._collecting:
-            raise RuntimeError("get_trace was called whilst collecting")
-
-        self._tmpfile.flush()
-
-        shutil.copy(self._tmpfile.name, outfile)
-
-        self._tmpfile.close()
-        self._tmpfile = None
+            raise RuntimeError("get_data was called whilst collecting")
+        if self.output_path is None:
+            raise RuntimeError("No data collected.")
+        return CollectorOutput([CollectorOutputEntry(self.output_path, 'file')])

devlib/collector/systrace.py

@@ -13,30 +13,16 @@
 # limitations under the License.
 #
 
-#    Copyright 2018 Arm Limited
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
 import os
 import subprocess
 
 from shutil import copyfile
 from tempfile import NamedTemporaryFile
 
-from devlib.exception import TargetError, HostError
-from devlib.trace import TraceCollector
-from devlib.utils.android import platform_tools
+from devlib.collector import (CollectorBase, CollectorOutput,
+                              CollectorOutputEntry)
+from devlib.exception import TargetStableError, HostError
+import devlib.utils.android
 from devlib.utils.misc import memoized
 
 
@@ -48,7 +34,7 @@ DEFAULT_CATEGORIES = [
     'idle'
 ]
 
-class SystraceCollector(TraceCollector):
+class SystraceCollector(CollectorBase):
     """
     A trace collector based on Systrace
 
@@ -74,13 +60,11 @@ class SystraceCollector(TraceCollector):
     @property
     @memoized
     def available_categories(self):
-        lines = subprocess.check_output([self.systrace_binary, '-l']).splitlines()
+        lines = subprocess.check_output(
+            [self.systrace_binary, '-l'], universal_newlines=True
+        ).splitlines()
 
-        categories = []
-        for line in lines:
-            categories.append(line.split()[0])
-
-        return categories
+        return [line.split()[0] for line in lines if line]
 
     def __init__(self, target,
                  categories=None,
@@ -91,13 +75,15 @@ class SystraceCollector(TraceCollector):
 
         self.categories = categories or DEFAULT_CATEGORIES
         self.buffer_size = buffer_size
+        self.output_path = None
 
         self._systrace_process = None
-        self._tmpfile = None
+        self._outfile_fh = None
 
         # Try to find a systrace binary
         self.systrace_binary = None
 
+        platform_tools = devlib.utils.android.platform_tools
         systrace_binary_path = os.path.join(platform_tools, 'systrace', 'systrace.py')
         if not os.path.isfile(systrace_binary_path):
             raise HostError('Could not find any systrace binary under {}'.format(platform_tools))
@@ -109,22 +95,23 @@ class SystraceCollector(TraceCollector):
             if category not in self.available_categories:
                 message = 'Category [{}] not available for tracing'.format(category)
                 if strict:
-                    raise TargetError(message)
+                    raise TargetStableError(message)
                 self.logger.warning(message)
 
         self.categories = list(set(self.categories) & set(self.available_categories))
         if not self.categories:
-            raise TargetError('None of the requested categories are available')
+            raise TargetStableError('None of the requested categories are available')
 
     def __del__(self):
         self.reset()
 
     def _build_cmd(self):
-        self._tmpfile = NamedTemporaryFile()
+        self._outfile_fh = open(self.output_path, 'w')
 
-        self.systrace_cmd = '{} -o {} -e {}'.format(
+        # pylint: disable=attribute-defined-outside-init
+        self.systrace_cmd = 'python2 -u {} -o {} -e {}'.format(
             self.systrace_binary,
-            self._tmpfile.name,
+            self._outfile_fh.name,
             self.target.adb_name
         )
 
@@ -137,13 +124,11 @@ class SystraceCollector(TraceCollector):
         if self._systrace_process:
             self.stop()
 
-        if self._tmpfile:
-            self._tmpfile.close()
-            self._tmpfile = None
-
     def start(self):
         if self._systrace_process:
             raise RuntimeError("Tracing is already underway, call stop() first")
+        if self.output_path is None:
+            raise RuntimeError("Output path was not set.")
 
         self.reset()
 
@@ -152,8 +137,11 @@ class SystraceCollector(TraceCollector):
         self._systrace_process = subprocess.Popen(
             self.systrace_cmd,
             stdin=subprocess.PIPE,
-            shell=True
+            stdout=subprocess.PIPE,
+            shell=True,
+            universal_newlines=True
         )
+        self._systrace_process.stdout.read(1)
 
     def stop(self):
         if not self._systrace_process:
@@ -163,11 +151,16 @@ class SystraceCollector(TraceCollector):
         self._systrace_process.communicate('\n')
         self._systrace_process = None
 
-    def get_trace(self, outfile):
+        if self._outfile_fh:
+            self._outfile_fh.close()
+            self._outfile_fh = None
+
+    def set_output(self, output_path):
+        self.output_path = output_path
+
+    def get_data(self):
         if self._systrace_process:
             raise RuntimeError("Tracing is underway, call stop() first")
-
-        if not self._tmpfile:
-            raise RuntimeError("No tracing data available")
-
-        copyfile(self._tmpfile.name, outfile)
+        if self.output_path is None:
+            raise RuntimeError("No data collected.")
+        return CollectorOutput([CollectorOutputEntry(self.output_path, 'file')])

devlib/connection.py

@@ -0,0 +1,665 @@
+#    Copyright 2019 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from abc import ABC, abstractmethod
+from contextlib import contextmanager
+from datetime import datetime
+from functools import partial
+from weakref import WeakSet
+from shlex import quote
+from time import monotonic
+import os
+import signal
+import socket
+import subprocess
+import threading
+import time
+import logging
+import select
+import fcntl
+
+from devlib.utils.misc import InitCheckpoint
+
+_KILL_TIMEOUT = 3
+
+
+def _kill_pgid_cmd(pgid, sig, busybox):
+    return '{} kill -{} -- -{}'.format(busybox, sig.value, pgid)
+
+def _popen_communicate(bg, popen, input, timeout):
+    try:
+        stdout, stderr = popen.communicate(input=input, timeout=timeout)
+    except subprocess.TimeoutExpired:
+        bg.cancel()
+        raise
+
+    ret = popen.returncode
+    if ret:
+        raise subprocess.CalledProcessError(
+            ret,
+            popen.args,
+            stdout,
+            stderr,
+        )
+    else:
+        return (stdout, stderr)
+
+
+class ConnectionBase(InitCheckpoint):
+    """
+    Base class for all connections.
+    """
+    def __init__(self):
+        self._current_bg_cmds = WeakSet()
+        self._closed = False
+        self._close_lock = threading.Lock()
+        self.busybox = None
+
+    def cancel_running_command(self):
+        bg_cmds = set(self._current_bg_cmds)
+        for bg_cmd in bg_cmds:
+            bg_cmd.cancel()
+
+    @abstractmethod
+    def _close(self):
+        """
+        Close the connection.
+
+        The public :meth:`close` method makes sure that :meth:`_close` will
+        only be called once, and will serialize accesses to it if it happens to
+        be called from multiple threads at once.
+        """
+
+    def close(self):
+        # Locking the closing allows any thread to safely call close() as long
+        # as the connection can be closed from a thread that is not the one it
+        # started its life in.
+        with self._close_lock:
+            if not self._closed:
+                self._close()
+                self._closed = True
+
+    # Ideally, that should not be relied upon but that will improve the chances
+    # of the connection being properly cleaned up when it's not in use anymore.
+    def __del__(self):
+        # Since __del__ will be called if an exception is raised in __init__
+        # (e.g. we cannot connect), we only run close() when we are sure
+        # __init__ has completed successfully.
+        if self.initialized:
+            self.close()
+
+
+class BackgroundCommand(ABC):
+    """
+    Allows managing a running background command using a subset of the
+    :class:`subprocess.Popen` API.
+
+    Instances of this class can be used as context managers, with the same
+    semantic as :class:`subprocess.Popen`.
+    """
+    @abstractmethod
+    def send_signal(self, sig):
+        """
+        Send a POSIX signal to the background command's process group ID
+        (PGID).
+
+        :param signal: Signal to send.
+        :type signal: signal.Signals
+        """
+
+    def kill(self):
+        """
+        Send SIGKILL to the background command.
+        """
+        self.send_signal(signal.SIGKILL)
+
+    def cancel(self, kill_timeout=_KILL_TIMEOUT):
+        """
+        Try to gracefully terminate the process by sending ``SIGTERM``, then
+        waiting for ``kill_timeout`` to send ``SIGKILL``.
+        """
+        if self.poll() is None:
+            self._cancel(kill_timeout=kill_timeout)
+
+    @abstractmethod
+    def _cancel(self, kill_timeout):
+        """
+        Method to override in subclasses to implement :meth:`cancel`.
+        """
+        pass
+
+    @abstractmethod
+    def wait(self):
+        """
+        Block until the background command completes, and return its exit code.
+        """
+
+    def communicate(self, input=b'', timeout=None):
+        """
+        Block until the background command completes while reading stdout and stderr.
+        Return ``tuple(stdout, stderr)``. If the return code is non-zero,
+        raises a :exc:`subprocess.CalledProcessError` exception.
+        """
+        try:
+            return self._communicate(input=input, timeout=timeout)
+        finally:
+            self.close()
+
+    @abstractmethod
+    def _communicate(self, input, timeout):
+        pass
+
+    @abstractmethod
+    def poll(self):
+        """
+        Return exit code if the command has exited, None otherwise.
+        """
+
+    @property
+    @abstractmethod
+    def stdin(self):
+        """
+        File-like object connected to the background's command stdin.
+        """
+
+    @property
+    @abstractmethod
+    def stdout(self):
+        """
+        File-like object connected to the background's command stdout.
+        """
+
+    @property
+    @abstractmethod
+    def stderr(self):
+        """
+        File-like object connected to the background's command stderr.
+        """
+
+    @property
+    @abstractmethod
+    def pid(self):
+        """
+        Process Group ID (PGID) of the background command.
+
+        Since the command is usually wrapped in shell processes for IO
+        redirections, sudo etc, the PID cannot be assumed to be the actual PID
+        of the command passed by the user. It's is guaranteed to be a PGID
+        instead, which means signals sent to it as such will target all
+        subprocesses involved in executing that command.
+        """
+
+    @abstractmethod
+    def close(self):
+        """
+        Close all opened streams and then wait for command completion.
+
+        :returns: Exit code of the command.
+
+        .. note:: If the command is writing to its stdout/stderr, it might be
+            blocked on that and die when the streams are closed.
+        """
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args, **kwargs):
+        self.close()
+
+
+class PopenBackgroundCommand(BackgroundCommand):
+    """
+    :class:`subprocess.Popen`-based background command.
+    """
+
+    def __init__(self, popen):
+        self.popen = popen
+
+    def send_signal(self, sig):
+        return os.killpg(self.popen.pid, sig)
+
+    @property
+    def stdin(self):
+        return self.popen.stdin
+
+    @property
+    def stdout(self):
+        return self.popen.stdout
+
+    @property
+    def stderr(self):
+        return self.popen.stderr
+
+    @property
+    def pid(self):
+        return self.popen.pid
+
+    def wait(self):
+        return self.popen.wait()
+
+    def _communicate(self, input, timeout):
+        return _popen_communicate(self, self.popen, input, timeout)
+
+    def poll(self):
+        return self.popen.poll()
+
+    def _cancel(self, kill_timeout):
+        popen = self.popen
+        os.killpg(os.getpgid(popen.pid), signal.SIGTERM)
+        try:
+            popen.wait(timeout=kill_timeout)
+        except subprocess.TimeoutExpired:
+            os.killpg(os.getpgid(popen.pid), signal.SIGKILL)
+
+    def close(self):
+        self.popen.__exit__(None, None, None)
+        return self.popen.returncode
+
+    def __enter__(self):
+        self.popen.__enter__()
+        return self
+
+    def __exit__(self, *args, **kwargs):
+        self.popen.__exit__(*args, **kwargs)
+
+
+class ParamikoBackgroundCommand(BackgroundCommand):
+    """
+    :mod:`paramiko`-based background command.
+    """
+    def __init__(self, conn, chan, pid, as_root, cmd, stdin, stdout, stderr, redirect_thread):
+        self.chan = chan
+        self.as_root = as_root
+        self.conn = conn
+        self._pid = pid
+        self._stdin = stdin
+        self._stdout = stdout
+        self._stderr = stderr
+        self.redirect_thread = redirect_thread
+        self.cmd = cmd
+
+    def send_signal(self, sig):
+        # If the command has already completed, we don't want to send a signal
+        # to another process that might have gotten that PID in the meantime.
+        if self.poll() is not None:
+            return
+        # Use -PGID to target a process group rather than just the process
+        # itself
+        cmd = _kill_pgid_cmd(self.pid, sig, self.conn.busybox)
+        self.conn.execute(cmd, as_root=self.as_root)
+
+    @property
+    def pid(self):
+        return self._pid
+
+    def wait(self):
+        status = self.chan.recv_exit_status()
+        # Ensure that the redirection thread is finished copying the content
+        # from paramiko to the pipe.
+        self.redirect_thread.join()
+        return status
+
+    def _communicate(self, input, timeout):
+        stdout = self._stdout
+        stderr = self._stderr
+        stdin = self._stdin
+        chan = self.chan
+
+        # For some reason, file descriptors in the read-list of select() can
+        # still end up blocking in .read(), so make the non-blocking to avoid a
+        # deadlock. Since _communicate() will consume all input and all output
+        # until the command dies, we can do whatever we want with the pipe
+        # without affecting external users.
+        for s in (stdout, stderr):
+            fcntl.fcntl(s.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
+
+        out = {stdout: [], stderr: []}
+        ret = None
+        can_send = True
+
+        select_timeout = 1
+        if timeout is not None:
+            select_timeout = min(select_timeout, 1)
+
+        def create_out():
+            return (
+                b''.join(out[stdout]),
+                b''.join(out[stderr])
+            )
+
+        start = monotonic()
+
+        while ret is None:
+            # Even if ret is not None anymore, we need to drain the streams
+            ret = self.poll()
+
+            if timeout is not None and ret is None and monotonic() - start >= timeout:
+                self.cancel()
+                _stdout, _stderr = create_out()
+                raise subprocess.TimeoutExpired(self.cmd, timeout, _stdout, _stderr)
+
+            can_send &= (not chan.closed) & bool(input)
+            wlist = [chan] if can_send else []
+
+            if can_send and chan.send_ready():
+                try:
+                    n = chan.send(input)
+                # stdin might have been closed already
+                except OSError:
+                    can_send = False
+                    chan.shutdown_write()
+                else:
+                    input = input[n:]
+                    if not input:
+                        # Send EOF on stdin
+                        chan.shutdown_write()
+
+            rs, ws, _ = select.select(
+                [x for x in (stdout, stderr) if not x.closed],
+                wlist,
+                [],
+                select_timeout,
+            )
+
+            for r in rs:
+                chunk = r.read()
+                if chunk:
+                    out[r].append(chunk)
+
+        _stdout, _stderr = create_out()
+
+        if ret:
+            raise subprocess.CalledProcessError(
+                ret,
+                self.cmd,
+                _stdout,
+                _stderr,
+            )
+        else:
+            return (_stdout, _stderr)
+
+    def poll(self):
+        # Wait for the redirection thread to finish, otherwise we would
+        # indicate the caller that the command is finished and that the streams
+        # are safe to drain, but actually the redirection thread is not
+        # finished yet, which would end up in lost data.
+        if self.redirect_thread.is_alive():
+            return None
+        elif self.chan.exit_status_ready():
+            return self.wait()
+        else:
+            return None
+
+    def _cancel(self, kill_timeout):
+        self.send_signal(signal.SIGTERM)
+        # Check if the command terminated quickly
+        time.sleep(10e-3)
+        # Otherwise wait for the full timeout and kill it
+        if self.poll() is None:
+            time.sleep(kill_timeout)
+            self.send_signal(signal.SIGKILL)
+            self.wait()
+
+    @property
+    def stdin(self):
+        return self._stdin
+
+    @property
+    def stdout(self):
+        return self._stdout
+
+    @property
+    def stderr(self):
+        return self._stderr
+
+    def close(self):
+        for x in (self.stdin, self.stdout, self.stderr):
+            if x is not None:
+                x.close()
+
+        exit_code = self.wait()
+        thread = self.redirect_thread
+        if thread:
+            thread.join()
+
+        return exit_code
+
+
+class AdbBackgroundCommand(BackgroundCommand):
+    """
+    ``adb``-based background command.
+    """
+
+    def __init__(self, conn, adb_popen, pid, as_root):
+        self.conn = conn
+        self.as_root = as_root
+        self.adb_popen = adb_popen
+        self._pid = pid
+
+    def send_signal(self, sig):
+        self.conn.execute(
+            _kill_pgid_cmd(self.pid, sig, self.conn.busybox),
+            as_root=self.as_root,
+        )
+
+    @property
+    def stdin(self):
+        return self.adb_popen.stdin
+
+    @property
+    def stdout(self):
+        return self.adb_popen.stdout
+
+    @property
+    def stderr(self):
+        return self.adb_popen.stderr
+
+    @property
+    def pid(self):
+        return self._pid
+
+    def wait(self):
+        return self.adb_popen.wait()
+
+    def _communicate(self, input, timeout):
+        return _popen_communicate(self, self.adb_popen, input, timeout)
+
+
+    def poll(self):
+        return self.adb_popen.poll()
+
+    def _cancel(self, kill_timeout):
+        self.send_signal(signal.SIGTERM)
+        try:
+            self.adb_popen.wait(timeout=kill_timeout)
+        except subprocess.TimeoutExpired:
+            self.send_signal(signal.SIGKILL)
+            self.adb_popen.kill()
+
+    def close(self):
+        self.adb_popen.__exit__(None, None, None)
+        return self.adb_popen.returncode
+
+    def __enter__(self):
+        self.adb_popen.__enter__()
+        return self
+
+    def __exit__(self, *args, **kwargs):
+        self.adb_popen.__exit__(*args, **kwargs)
+
+
+class TransferManagerBase(ABC):
+
+    def _pull_dest_size(self, dest):
+        if os.path.isdir(dest):
+            return sum(
+                os.stat(os.path.join(dirpath, f)).st_size
+	            for dirpath, _, fnames in os.walk(dest)
+	            for f in fnames
+            )
+        else:
+            return os.stat(dest).st_size
+        return 0
+
+    def _push_dest_size(self, dest):
+        cmd = '{} du -s {}'.format(quote(self.conn.busybox), quote(dest))
+        out = self.conn.execute(cmd)
+        try:
+            return int(out.split()[0])
+        except ValueError:
+            return 0
+
+    def __init__(self, conn, poll_period, start_transfer_poll_delay, total_timeout):
+        self.conn = conn
+        self.poll_period = poll_period
+        self.total_timeout = total_timeout
+        self.start_transfer_poll_delay = start_transfer_poll_delay
+
+        self.logger = logging.getLogger('FileTransfer')
+        self.managing = threading.Event()
+        self.transfer_started = threading.Event()
+        self.transfer_completed = threading.Event()
+        self.transfer_aborted = threading.Event()
+
+        self.monitor_thread = None
+        self.sources = None
+        self.dest = None
+        self.direction = None
+
+    @abstractmethod
+    def _cancel(self):
+        pass
+
+    def cancel(self, reason=None):
+        msg = 'Cancelling file transfer {} -> {}'.format(self.sources, self.dest)
+        if reason is not None:
+            msg += ' due to \'{}\''.format(reason)
+        self.logger.warning(msg)
+        self.transfer_aborted.set()
+        self._cancel()
+
+    @abstractmethod
+    def isactive(self):
+        pass
+
+    @contextmanager
+    def manage(self, sources, dest, direction):
+        try:
+            self.sources, self.dest, self.direction = sources, dest, direction
+            m_thread = threading.Thread(target=self._monitor)
+
+            self.transfer_completed.clear()
+            self.transfer_aborted.clear()
+            self.transfer_started.set()
+
+            m_thread.start()
+            yield self
+        except BaseException:
+            self.cancel(reason='exception during transfer')
+            raise
+        finally:
+            self.transfer_completed.set()
+            self.transfer_started.set()
+            m_thread.join()
+            self.transfer_started.clear()
+            self.transfer_completed.clear()
+            self.transfer_aborted.clear()
+
+    def _monitor(self):
+        start_t = monotonic()
+        self.transfer_completed.wait(self.start_transfer_poll_delay)
+        while not self.transfer_completed.wait(self.poll_period):
+            if not self.isactive():
+                self.cancel(reason='transfer inactive')
+            elif monotonic() - start_t > self.total_timeout:
+                self.cancel(reason='transfer timed out')
+
+
+class PopenTransferManager(TransferManagerBase):
+
+    def __init__(self, conn, poll_period=30, start_transfer_poll_delay=30, total_timeout=3600):
+        super().__init__(conn, poll_period, start_transfer_poll_delay, total_timeout)
+        self.transfer = None
+        self.last_sample = None
+
+    def _cancel(self):
+        if self.transfer:
+            self.transfer.cancel()
+            self.transfer = None
+            self.last_sample = None
+
+    def isactive(self):
+        size_fn = self._push_dest_size if self.direction == 'push' else self._pull_dest_size
+        curr_size = size_fn(self.dest)
+        self.logger.debug('Polled file transfer, destination size {}'.format(curr_size))
+        active = True if self.last_sample is None else curr_size > self.last_sample
+        self.last_sample = curr_size
+        return active
+
+    def set_transfer_and_wait(self, popen_bg_cmd):
+        self.transfer = popen_bg_cmd
+        self.last_sample = None
+        ret = self.transfer.wait()
+
+        if ret and not self.transfer_aborted.is_set():
+            raise subprocess.CalledProcessError(ret, self.transfer.popen.args)
+        elif self.transfer_aborted.is_set():
+            raise TimeoutError(self.transfer.popen.args)
+
+
+class SSHTransferManager(TransferManagerBase):
+
+    def __init__(self, conn, poll_period=30, start_transfer_poll_delay=30, total_timeout=3600):
+        super().__init__(conn, poll_period, start_transfer_poll_delay, total_timeout)
+        self.transferer = None
+        self.progressed = False
+        self.transferred = None
+        self.to_transfer = None
+
+    def _cancel(self):
+        self.transferer.close()
+
+    def isactive(self):
+        progressed = self.progressed
+        self.progressed = False
+        msg = 'Polled transfer: {}% [{}B/{}B]'
+        pc = format((self.transferred / self.to_transfer) * 100, '.2f')
+        self.logger.debug(msg.format(pc, self.transferred, self.to_transfer))
+        return progressed
+
+    @contextmanager
+    def manage(self, sources, dest, direction, transferer):
+        with super().manage(sources, dest, direction):
+            try:
+                self.progressed = False
+                self.transferer = transferer  # SFTPClient or SCPClient
+                yield self
+            except socket.error as e:
+                if self.transfer_aborted.is_set():
+                    self.transfer_aborted.clear()
+                    method = 'SCP' if self.conn.use_scp else 'SFTP'
+                    raise TimeoutError('{} {}: {} -> {}'.format(method, self.direction, sources, self.dest))
+                else:
+                    raise e
+
+    def progress_cb(self, *args):
+        if self.transfer_started.is_set():
+            self.progressed = True
+            if len(args) == 3:  # For SCPClient callbacks
+                self.transferred = args[2]
+                self.to_transfer = args[1]
+            elif len(args) == 2:  # For SFTPClient callbacks
+                self.transferred = args[0]
+                self.to_transfer = args[1]

devlib/derived/__init__.py

@@ -36,25 +36,28 @@ class DerivedMetric(object):
                 msg = 'Unknown measurement type:  {}'
                 raise ValueError(msg.format(measurement_type))
 
-    def __cmp__(self, other):
-        if hasattr(other, 'value'):
-            return cmp(self.value, other.value)
-        else:
-            return cmp(self.value, other)
-
     def __str__(self):
         if self.units:
             return '{}: {} {}'.format(self.name, self.value, self.units)
         else:
             return '{}: {}'.format(self.name, self.value)
 
+    # pylint: disable=undefined-variable
+    def __cmp__(self, other):
+        if hasattr(other, 'value'):
+            return cmp(self.value, other.value)
+        else:
+            return cmp(self.value, other)
+
     __repr__ = __str__
 
 
 class DerivedMeasurements(object):
 
+    # pylint: disable=no-self-use,unused-argument
     def process(self, measurements_csv):
         return []
 
+    # pylint: disable=no-self-use
     def process_raw(self, *args):
         return []

devlib/derived/energy.py

@@ -15,12 +15,13 @@
 from __future__ import division
 from collections import defaultdict
 
-from devlib import DerivedMeasurements, DerivedMetric
-from devlib.instrument import  MEASUREMENT_TYPES, InstrumentChannel
+from devlib.derived import DerivedMeasurements, DerivedMetric
+from devlib.instrument import  MEASUREMENT_TYPES
 
 
 class DerivedEnergyMeasurements(DerivedMeasurements):
 
+    # pylint: disable=too-many-locals,too-many-branches
     @staticmethod
     def process(measurements_csv):
 

devlib/derived/fps.py

@@ -15,7 +15,6 @@
 
 from __future__ import division
 import os
-import re
 
 try:
     import pandas as pd
@@ -24,8 +23,9 @@ except ImportError:
 
 from past.builtins import basestring
 
-from devlib import DerivedMeasurements, DerivedMetric, MeasurementsCsv, InstrumentChannel
+from devlib.derived import DerivedMeasurements, DerivedMetric
 from devlib.exception import HostError
+from devlib.instrument import MeasurementsCsv
 from devlib.utils.csvutil import csvwriter
 from devlib.utils.rendering import gfxinfo_get_last_dump, VSYNC_INTERVAL
 from devlib.utils.types import numeric
@@ -45,6 +45,7 @@ class DerivedFpsStats(DerivedMeasurements):
         if filename is not None and os.sep in filename:
             raise ValueError('filename cannot be a path (cannot countain "{}"'.format(os.sep))
 
+    # pylint: disable=no-member
     def process(self, measurements_csv):
         if isinstance(measurements_csv, basestring):
             measurements_csv = MeasurementsCsv(measurements_csv)
@@ -65,6 +66,7 @@ class DerivedFpsStats(DerivedMeasurements):
 
 class DerivedGfxInfoStats(DerivedFpsStats):
 
+    #pylint: disable=arguments-differ
     @staticmethod
     def process_raw(filepath, *args):
         metrics = []
@@ -104,17 +106,17 @@ class DerivedGfxInfoStats(DerivedFpsStats):
             frame_count += 1
 
             if start_vsync is None:
-                start_vsync = frame_data.Vsync_time_us
-            end_vsync = frame_data.Vsync_time_us
+                start_vsync = frame_data.Vsync_time_ns
+            end_vsync = frame_data.Vsync_time_ns
 
-            frame_time = frame_data.FrameCompleted_time_us - frame_data.IntendedVsync_time_us
+            frame_time = frame_data.FrameCompleted_time_ns - frame_data.IntendedVsync_time_ns
             pff = 1e9 / frame_time
             if pff > self.drop_threshold:
                 per_frame_fps.append([pff])
 
         if frame_count:
             duration = end_vsync - start_vsync
-            fps = (1e6 * frame_count) / float(duration)
+            fps = (1e9 * frame_count) / float(duration)
         else:
             duration = 0
             fps = 0
@@ -131,15 +133,15 @@ class DerivedGfxInfoStats(DerivedFpsStats):
     def _process_with_pandas(self, measurements_csv):
         data = pd.read_csv(measurements_csv.path)
         data = data[data.Flags_flags == 0]
-        frame_time = data.FrameCompleted_time_us - data.IntendedVsync_time_us
-        per_frame_fps = (1e6 / frame_time)
+        frame_time = data.FrameCompleted_time_ns - data.IntendedVsync_time_ns
+        per_frame_fps = (1e9 / frame_time)
         keep_filter = per_frame_fps > self.drop_threshold
         per_frame_fps = per_frame_fps[keep_filter]
         per_frame_fps.name = 'fps'
 
         frame_count = data.index.size
         if frame_count > 1:
-            duration = data.Vsync_time_us.iloc[-1] - data.Vsync_time_us.iloc[0]
+            duration = data.Vsync_time_ns.iloc[-1] - data.Vsync_time_ns.iloc[0]
             fps = (1e9 * frame_count) / float(duration)
         else:
             duration = 0
@@ -155,6 +157,7 @@ class DerivedGfxInfoStats(DerivedFpsStats):
 
 class DerivedSurfaceFlingerStats(DerivedFpsStats):
 
+    # pylint: disable=too-many-locals
     def _process_with_pandas(self, measurements_csv):
         data = pd.read_csv(measurements_csv.path)
 
@@ -193,7 +196,7 @@ class DerivedSurfaceFlingerStats(DerivedFpsStats):
             janks = 0
             not_at_vsync = 0
 
-        janks_pc =  0 if frame_count == 0 else janks * 100 / frame_count
+        janks_pc = 0 if frame_count == 0 else janks * 100 / frame_count
 
         return [DerivedMetric('fps', fps, 'fps'),
                 DerivedMetric('total_frames', frame_count, 'frames'),
@@ -202,6 +205,7 @@ class DerivedSurfaceFlingerStats(DerivedFpsStats):
                 DerivedMetric('janks_pc', janks_pc, 'percent'),
                 DerivedMetric('missed_vsync', not_at_vsync, 'count')]
 
+    # pylint: disable=unused-argument,no-self-use
     def _process_without_pandas(self, measurements_csv):
         # Given that SurfaceFlinger has been deprecated in favor of GfxInfo,
         # it does not seem worth it implementing this.

devlib/exception.py

@@ -13,13 +13,44 @@
 # limitations under the License.
 #
 
+import subprocess
+
 class DevlibError(Exception):
     """Base class for all Devlib exceptions."""
+
+    def __init__(self, *args):
+        message = args[0] if args else None
+        self._message = message
+
     @property
     def message(self):
-        if self.args:
-            return self.args[0]
-        return str(self)
+        try:
+            msg = self._message
+        except AttributeError:
+            msg = None
+
+        if msg is None:
+            return str(self)
+        else:
+            return self._message
+
+
+class DevlibStableError(DevlibError):
+    """Non transient target errors, that are not subject to random variations
+    in the environment and can be reliably linked to for example a missing
+    feature on a target."""
+    pass
+
+
+class DevlibTransientError(DevlibError):
+    """Exceptions inheriting from ``DevlibTransientError`` represent random
+    transient events that are usually related to issues in the environment, as
+    opposed to programming errors, for example network failures or
+    timeout-related exceptions. When the error could come from
+    indistinguishable transient or non-transient issue, it can generally be
+    assumed that the configuration is correct and therefore, a transient
+    exception is raised."""
+    pass
 
 
 class TargetError(DevlibError):
@@ -27,7 +58,56 @@ class TargetError(DevlibError):
     pass
 
 
-class TargetNotRespondingError(DevlibError):
+class TargetTransientError(TargetError, DevlibTransientError):
+    """Transient target errors that can happen randomly when everything is
+    properly configured."""
+    pass
+
+
+class TargetStableError(TargetError, DevlibStableError):
+    """Non-transient target errors that can be linked to a programming error or
+    a configuration issue, and is not influenced by non-controllable parameters
+    such as network issues."""
+    pass
+
+
+class TargetCalledProcessError(subprocess.CalledProcessError, TargetError):
+    """Exception raised when a command executed on the target fails."""
+    def __str__(self):
+        msg = super().__str__()
+        def decode(s):
+            try:
+                s = s.decode()
+            except AttributeError:
+                s = str(s)
+
+            return s.strip()
+
+        if self.stdout is not None and self.stderr is None:
+            out = ['OUTPUT: {}'.format(decode(self.output))]
+        else:
+            out = [
+                'STDOUT: {}'.format(decode(self.output)) if self.output is not None else '',
+                'STDERR: {}'.format(decode(self.stderr)) if self.stderr is not None else '',
+            ]
+
+        return '\n'.join((
+            msg,
+            *out,
+        ))
+
+
+class TargetStableCalledProcessError(TargetCalledProcessError, TargetStableError):
+    """Variant of :exc:`devlib.exception.TargetCalledProcessError` that indicates a stable error"""
+    pass
+
+
+class TargetTransientCalledProcessError(TargetCalledProcessError, TargetTransientError):
+    """Variant of :exc:`devlib.exception.TargetCalledProcessError` that indicates a transient error"""
+    pass
+
+
+class TargetNotRespondingError(TargetTransientError):
     """The target is unresponsive."""
     pass
 
@@ -37,7 +117,8 @@ class HostError(DevlibError):
     pass
 
 
-class TimeoutError(DevlibError):
+# pylint: disable=redefined-builtin
+class TimeoutError(DevlibTransientError):
     """Raised when a subprocess command times out. This is basically a ``DevlibError``-derived version
     of ``subprocess.CalledProcessError``, the thinking being that while a timeout could be due to
     programming error (e.g. not setting long enough timers), it is often due to some failure in the
@@ -73,19 +154,29 @@ class WorkerThreadError(DevlibError):
         super(WorkerThreadError, self).__init__(message)
 
 
+class KernelConfigKeyError(KeyError, IndexError, DevlibError):
+    """
+    Exception raised when a kernel config option cannot be found.
+
+    It inherits from :exc:`IndexError` for backward compatibility, and
+    :exc:`KeyError` to behave like a regular mapping.
+    """
+    pass
+
+
 def get_traceback(exc=None):
     """
     Returns the string with the traceback for the specifiec exc
     object, or for the current exception exc is not specified.
 
     """
-    import io, traceback, sys
+    import io, traceback, sys  # pylint: disable=multiple-imports
     if exc is None:
         exc = sys.exc_info()
     if not exc:
         return None
     tb = exc[2]
-    sio = io.BytesIO()
+    sio = io.StringIO()
     traceback.print_tb(tb, file=sio)
     del tb  # needs to be done explicitly see: http://docs.python.org/2/library/sys.html#sys.exc_info
     return sio.getvalue()

devlib/host.py

@@ -12,79 +12,151 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-from glob import iglob
+import glob
 import os
 import signal
 import shutil
 import subprocess
 import logging
+from distutils.dir_util import copy_tree
 from getpass import getpass
+from pipes import quote
 
-from devlib.exception import TargetError
+from devlib.exception import (
+    TargetTransientError, TargetStableError,
+    TargetTransientCalledProcessError, TargetStableCalledProcessError
+)
 from devlib.utils.misc import check_output
+from devlib.connection import ConnectionBase, PopenBackgroundCommand
+
 
 PACKAGE_BIN_DIRECTORY = os.path.join(os.path.dirname(__file__), 'bin')
 
+
+# pylint: disable=redefined-outer-name
 def kill_children(pid, signal=signal.SIGKILL):
     with open('/proc/{0}/task/{0}/children'.format(pid), 'r') as fd:
         for cpid in map(int, fd.read().strip().split()):
             kill_children(cpid, signal)
             os.kill(cpid, signal)
 
-class LocalConnection(object):
+
+class LocalConnection(ConnectionBase):
 
     name = 'local'
+    host = 'localhost'
 
+    @property
+    def connected_as_root(self):
+        if self._connected_as_root is None:
+            result = self.execute('id', as_root=False)
+            self._connected_as_root = 'uid=0(' in result
+        return self._connected_as_root
+
+    @connected_as_root.setter
+    def connected_as_root(self, state):
+        self._connected_as_root = state
+
+    # pylint: disable=unused-argument
     def __init__(self, platform=None, keep_password=True, unrooted=False,
                  password=None, timeout=None):
+        super().__init__()
+        self._connected_as_root = None
         self.logger = logging.getLogger('local_connection')
         self.keep_password = keep_password
         self.unrooted = unrooted
         self.password = password
 
-    def push(self, source, dest, timeout=None, as_root=False):  # pylint: disable=unused-argument
-        self.logger.debug('cp {} {}'.format(source, dest))
-        shutil.copy(source, dest)
 
-    def pull(self, source, dest, timeout=None, as_root=False): # pylint: disable=unused-argument
-        self.logger.debug('cp {} {}'.format(source, dest))
-        if ('*' in source or '?' in source) and os.path.isdir(dest):
-            # Pull all files matching a wildcard expression
-            for each_source in iglob(source):
-                shutil.copy(each_source, dest)
+    def _copy_path(self, source, dest):
+        self.logger.debug('copying {} to {}'.format(source, dest))
+        if os.path.isdir(source):
+            # Use distutils copy_tree since it behaves the same as
+            # shutils.copytree except that it won't fail if some folders
+            # already exist.
+            #
+            # Mirror the behavior of all other targets which only copy the
+            # content without metadata
+            copy_tree(source, dest, preserve_mode=False, preserve_times=False)
         else:
             shutil.copy(source, dest)
 
+    def _copy_paths(self, sources, dest):
+        for source in sources:
+            self._copy_path(source, dest)
+
+    def push(self, sources, dest, timeout=None, as_root=False):  # pylint: disable=unused-argument
+        self._copy_paths(sources, dest)
+
+    def pull(self, sources, dest, timeout=None, as_root=False): # pylint: disable=unused-argument
+        self._copy_paths(sources, dest)
+
+    # pylint: disable=unused-argument
     def execute(self, command, timeout=None, check_exit_code=True,
-                as_root=False, strip_colors=True):
+                as_root=False, strip_colors=True, will_succeed=False):
         self.logger.debug(command)
-        if as_root:
+        use_sudo = as_root and not self.connected_as_root
+        if use_sudo:
             if self.unrooted:
-                raise TargetError('unrooted')
+                raise TargetStableError('unrooted')
             password = self._get_password()
-            command = 'echo \'{}\' | sudo -S '.format(password) + command
+            command = "echo {} | sudo -k -p ' ' -S -- sh -c {}".format(quote(password), quote(command))
         ignore = None if check_exit_code else 'all'
         try:
-            return check_output(command, shell=True, timeout=timeout, ignore=ignore)[0]
+            stdout, stderr = check_output(command, shell=True, timeout=timeout, ignore=ignore)
         except subprocess.CalledProcessError as e:
-            message = 'Got exit code {}\nfrom: {}\nOUTPUT: {}'.format(
-                e.returncode, command, e.output)
-            raise TargetError(message)
+            cls = TargetTransientCalledProcessError if will_succeed else TargetStableCalledProcessError
+            raise cls(
+                e.returncode,
+                command,
+                e.output,
+                e.stderr,
+            )
+
+        # Remove the one-character prompt of sudo -S -p
+        if use_sudo and stderr:
+            stderr = stderr[1:]
+
+        return stdout + stderr
 
     def background(self, command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, as_root=False):
-        if as_root:
+        if as_root and not self.connected_as_root:
             if self.unrooted:
-                raise TargetError('unrooted')
+                raise TargetStableError('unrooted')
             password = self._get_password()
-            command = 'echo \'{}\' | sudo -S '.format(password) + command
-        return subprocess.Popen(command, stdout=stdout, stderr=stderr, shell=True)
+            # The sudo prompt will add a space on stderr, but we cannot filter
+            # it out here
+            command = "echo {} | sudo -k -p ' ' -S -- sh -c {}".format(quote(password), quote(command))
 
-    def close(self):
+        # Make sure to get a new PGID so PopenBackgroundCommand() can kill
+        # all sub processes that could be started without troubles.
+        def preexec_fn():
+            os.setpgrp()
+
+        popen = subprocess.Popen(
+            command,
+            stdout=stdout,
+            stderr=stderr,
+            stdin=subprocess.PIPE,
+            shell=True,
+            preexec_fn=preexec_fn,
+        )
+        bg_cmd = PopenBackgroundCommand(popen)
+        self._current_bg_cmds.add(bg_cmd)
+        return bg_cmd
+
+    def _close(self):
         pass
 
     def cancel_running_command(self):
         pass
 
+    def wait_for_device(self, timeout=30):
+        return
+
+    def reboot_bootloader(self, timeout=30):
+        raise NotImplementedError()
+
     def _get_password(self):
         if self.password:
             return self.password

devlib/instrument/__init__.py

@@ -58,6 +58,7 @@ class MeasurementType(object):
             raise ValueError(msg.format(self.name, to.name))
         return self.conversions[to.name](value)
 
+    # pylint: disable=undefined-variable
     def __cmp__(self, other):
         if isinstance(other, MeasurementType):
             other = other.name
@@ -96,20 +97,30 @@ _measurement_types = [
     # covert without being familar with individual instruments.
     MeasurementType('time', 'seconds', 'time',
         conversions={
-            'time_us': lambda x: x * 1000000,
-            'time_ms': lambda x: x * 1000,
+            'time_us': lambda x: x * 1e6,
+            'time_ms': lambda x: x * 1e3,
+            'time_ns': lambda x: x * 1e9,
         }
     ),
     MeasurementType('time_us', 'microseconds', 'time',
         conversions={
-            'time': lambda x: x / 1000000,
-            'time_ms': lambda x: x / 1000,
+            'time': lambda x: x / 1e6,
+            'time_ms': lambda x: x / 1e3,
+            'time_ns': lambda x: x * 1e3,
         }
     ),
     MeasurementType('time_ms', 'milliseconds', 'time',
         conversions={
-            'time': lambda x: x / 1000,
-            'time_us': lambda x: x * 1000,
+            'time': lambda x: x / 1e3,
+            'time_us': lambda x: x * 1e3,
+            'time_ns': lambda x: x * 1e6,
+        }
+    ),
+    MeasurementType('time_ns', 'nanoseconds', 'time',
+    conversions={
+        'time': lambda x: x / 1e9,
+        'time_ms': lambda x: x / 1e6,
+        'time_us': lambda x: x / 1e3,
         }
     ),
 
@@ -151,6 +162,7 @@ class Measurement(object):
         self.value = value
         self.channel = channel
 
+    # pylint: disable=undefined-variable
     def __cmp__(self, other):
         if hasattr(other, 'value'):
             return cmp(self.value, other.value)
@@ -204,7 +216,7 @@ class MeasurementsCsv(object):
             for mt in MEASUREMENT_TYPES:
                 suffix = '_{}'.format(mt)
                 if entry.endswith(suffix):
-                    site =  entry[:-len(suffix)]
+                    site = entry[:-len(suffix)]
                     measure = mt
                     break
             else:
@@ -218,6 +230,7 @@ class MeasurementsCsv(object):
             chan = InstrumentChannel(site, measure)
             self.channels.append(chan)
 
+    # pylint: disable=stop-iteration-return
     def _iter_rows(self):
         with csvreader(self.path) as reader:
             next(reader)  # headings
@@ -308,16 +321,16 @@ class Instrument(object):
                 msg = 'Unexpected channel "{}"; must be in {}'
                 raise ValueError(msg.format(e, self.channels.keys()))
         elif sites is None and kinds is None:
-            self.active_channels = sorted(self.channels.itervalues(), key=lambda x: x.label)
+            self.active_channels = sorted(self.channels.values(), key=lambda x: x.label)
         else:
             if isinstance(sites, basestring):
                 sites = [sites]
             if isinstance(kinds, basestring):
                 kinds = [kinds]
 
-            wanted = lambda ch : ((kinds is None or ch.kind in kinds) and
+            wanted = lambda ch: ((kinds is None or ch.kind in kinds) and
                                   (sites is None or ch.site in sites))
-            self.active_channels = filter(wanted, self.channels.itervalues())
+            self.active_channels = list(filter(wanted, self.channels.values()))
 
     # instantaneous
 
@@ -332,6 +345,7 @@ class Instrument(object):
     def stop(self):
         pass
 
+    # pylint: disable=no-self-use
     def get_data(self, outfile):
         pass
 

devlib/instrument/acmecape.py

@@ -19,9 +19,11 @@ import os
 import sys
 import time
 import tempfile
+import shlex
 from fcntl import fcntl, F_GETFL, F_SETFL
 from string import Template
 from subprocess import Popen, PIPE, STDOUT
+from pipes import quote
 
 from devlib import Instrument, CONTINUOUS, MeasurementsCsv
 from devlib.exception import HostError
@@ -56,12 +58,14 @@ class AcmeCapeInstrument(Instrument):
                  iio_capture=which('iio-capture'),
                  host='baylibre-acme.local',
                  iio_device='iio:device0',
-                 buffer_size=256):
+                 buffer_size=256,
+                 keep_raw=False):
         super(AcmeCapeInstrument, self).__init__(target)
         self.iio_capture = iio_capture
         self.host = host
         self.iio_device = iio_device
         self.buffer_size = buffer_size
+        self.keep_raw = keep_raw
         self.sample_rate_hz = 100
         if self.iio_capture is None:
             raise HostError('Missing iio-capture binary')
@@ -85,15 +89,17 @@ class AcmeCapeInstrument(Instrument):
         params = dict(
             iio_capture=self.iio_capture,
             host=self.host,
-            buffer_size=self.buffer_size,
+            # This must be a string for quote()
+            buffer_size=str(self.buffer_size),
             iio_device=self.iio_device,
             outfile=self.raw_data_file
         )
+        params = {k: quote(v) for k, v in params.items()}
         self.command = IIOCAP_CMD_TEMPLATE.substitute(**params)
         self.logger.debug('ACME cape command: {}'.format(self.command))
 
     def start(self):
-        self.process = Popen(self.command.split(), stdout=PIPE, stderr=STDOUT)
+        self.process = Popen(shlex.split(self.command), stdout=PIPE, stderr=STDOUT)
 
     def stop(self):
         self.process.terminate()
@@ -112,7 +118,7 @@ class AcmeCapeInstrument(Instrument):
                 raise HostError(msg.format(output))
         if self.process.returncode != 15: # iio-capture exits with 15 when killed
             if sys.version_info[0] == 3:
-                output += self.process.stdout.read().decode(sys.stdout.encoding, 'replace')
+                output += self.process.stdout.read().decode(sys.stdout.encoding or 'utf-8', 'replace')
             else:
                 output += self.process.stdout.read()
             self.logger.info('ACME instrument encountered an error, '
@@ -155,3 +161,8 @@ class AcmeCapeInstrument(Instrument):
 
     def get_raw(self):
         return [self.raw_data_file]
+
+    def teardown(self):
+        if not self.keep_raw:
+            if os.path.isfile(self.raw_data_file):
+                os.remove(self.raw_data_file)

devlib/instrument/arm_energy_probe.py

@@ -34,8 +34,7 @@ from __future__ import division
 import os
 import subprocess
 import signal
-import struct
-import sys
+from pipes import quote
 
 import tempfile
 import shutil
@@ -72,7 +71,7 @@ class ArmEnergyProbeInstrument(Instrument):
 
     MAX_CHANNELS = 12 # 4 Arm Energy Probes
 
-    def __init__(self, target, config_file='./config-aep', ):
+    def __init__(self, target, config_file='./config-aep', keep_raw=False):
         super(ArmEnergyProbeInstrument, self).__init__(target)
         self.arm_probe = which('arm-probe')
         if self.arm_probe is None:
@@ -81,6 +80,7 @@ class ArmEnergyProbeInstrument(Instrument):
         self.attributes = ['power', 'voltage', 'current']
         self.sample_rate_hz = 10000
         self.config_file = config_file
+        self.keep_raw = keep_raw
 
         self.parser = AepParser()
         #TODO make it generic
@@ -99,7 +99,7 @@ class ArmEnergyProbeInstrument(Instrument):
         self.output_file_figure = os.path.join(self.output_directory, 'summary.txt')
         self.output_file_error = os.path.join(self.output_directory, 'error.log')
         self.output_fd_error = open(self.output_file_error, 'w')
-        self.command = 'arm-probe --config {} > {}'.format(self.config_file, self.output_file_raw)
+        self.command = 'arm-probe --config {} > {}'.format(quote(self.config_file), quote(self.output_file_raw))
 
     def start(self):
         self.logger.debug(self.command)
@@ -109,8 +109,8 @@ class ArmEnergyProbeInstrument(Instrument):
                                        shell=True)
 
     def stop(self):
-       self.logger.debug("kill running arm-probe")
-       os.killpg(self.armprobe.pid, signal.SIGTERM)
+        self.logger.debug("kill running arm-probe")
+        os.killpg(self.armprobe.pid, signal.SIGTERM)
 
     def get_data(self, outfile):  # pylint: disable=R0914
         self.logger.debug("Parse data and compute consumed energy")
@@ -133,7 +133,7 @@ class ArmEnergyProbeInstrument(Instrument):
                     if len(row) < len(active_channels):
                         continue
                     # all data are in micro (seconds/watt)
-                    new = [ float(row[i])/1000000 for i in active_indexes ]
+                    new = [float(row[i])/1000000 for i in active_indexes]
                     writer.writerow(new)
 
         self.output_fd_error.close()
@@ -143,3 +143,8 @@ class ArmEnergyProbeInstrument(Instrument):
 
     def get_raw(self):
         return [self.output_file_raw]
+
+    def teardown(self):
+        if not self.keep_raw:
+            if os.path.isfile(self.output_file_raw):
+                os.remove(self.output_file_raw)

devlib/instrument/baylibre_acme.py

@@ -0,0 +1,557 @@
+#pylint: disable=attribute-defined-outside-init
+
+import collections
+import functools
+import re
+import threading
+
+from past.builtins import basestring
+
+try:
+    import iio
+except ImportError as e:
+    iio_import_failed = True
+    iio_import_error  = e
+else:
+    iio_import_failed = False
+import numpy as np
+import pandas as pd
+
+from devlib import CONTINUOUS, Instrument, HostError, MeasurementsCsv, TargetError
+from devlib.utils.ssh import SshConnection
+
+class IIOINA226Channel(object):
+
+    def __init__(self, iio_channel):
+
+        channel_id   = iio_channel.id
+        channel_type = iio_channel.attrs['type'].value
+
+        re_measure = r'(?P<measure>\w+)(?P<index>\d*)$'
+        re_dtype = r'le:(?P<sign>\w)(?P<width>\d+)/(?P<size>\d+)>>(?P<align>\d+)'
+
+        match_measure = re.search(re_measure, channel_id)
+        match_dtype = re.search(re_dtype, channel_type)
+
+        if not match_measure:
+            msg = "IIO channel ID '{}' does not match expected RE '{}'"
+            raise ValueError(msg.format(channel_id, re_measure))
+
+        if not match_dtype:
+            msg = "'IIO channel type '{}' does not match expected RE '{}'"
+            raise ValueError(msg.format(channel_type, re_dtype))
+
+        self.measure = match_measure.group('measure')
+        self.iio_dtype = 'int{}'.format(match_dtype.group('width'))
+        self.iio_channel = iio_channel
+        # Data is reported in amps, volts, watts and microseconds:
+        self.iio_scale   = (1. if 'scale' not in iio_channel.attrs
+                            else float(iio_channel.attrs['scale'].value))
+        self.iio_scale /= 1000
+        # As calls to iio_store_buffer will be blocking and probably coming
+        # from a loop retrieving samples from the ACME, we want to provide
+        # consistency in processing timing between iterations i.e. we want
+        # iio_store_buffer to be o(1) for every call (can't have that with []):
+        self.sample_buffers = collections.deque()
+
+    def iio_store_buffer_samples(self, iio_buffer):
+        # IIO buffers receive and store their data as an interlaced array of
+        # samples from all the IIO channels of the IIO device. The IIO library
+        # provides a reliable function to extract the samples (bytes, actually)
+        # corresponding to a channel from the received buffer; in Python, it is
+        # iio.Channel.read(iio.Buffer).
+        #
+        # NB: As this is called in a potentially tightly timed loop, we do as
+        #     little work as possible:
+        self.sample_buffers.append(self.iio_channel.read(iio_buffer))
+
+    def iio_get_samples(self, absolute_timestamps=False):
+        # Up to this point, the data is not interpreted yet i.e. these are
+        # bytearrays. Hence the use of np.dtypes.
+        buffers = [np.frombuffer(b, dtype=self.iio_dtype)
+                   for b in self.sample_buffers]
+
+        must_shift = (self.measure == 'timestamp' and not absolute_timestamps)
+        samples = np.concatenate(buffers)
+        return (samples - samples[0] if must_shift else samples) * self.iio_scale
+
+    def iio_forget_samples(self):
+        self.sample_buffers.clear()
+
+
+# Decorators for the attributes of IIOINA226Instrument:
+
+def only_set_to(valid_values, dynamic=False):
+    def validating_wrapper(func):
+        @functools.wraps(func)
+        def wrapper(self, value):
+            values = (valid_values if not dynamic
+                      else getattr(self, valid_values))
+            if value not in values: 
+                msg = '{} is invalid; expected values are {}'
+                raise ValueError(msg.format(value, valid_values))
+            return func(self, value)
+        return wrapper
+    return validating_wrapper
+
+
+def with_input_as(wanted_type):
+    def typecasting_wrapper(func):
+        @functools.wraps(func)
+        def wrapper(self, value):
+            return func(self, wanted_type(value))
+        return wrapper
+    return typecasting_wrapper
+
+
+def _IIODeviceAttr(attr_name, attr_type, writable=False, dyn_vals=None, stat_vals=None):
+
+    def getter(self):
+        return attr_type(self.iio_device.attrs[attr_name].value)
+
+    def setter(self, value):
+        self.iio_device.attrs[attr_name].value = str(attr_type(value))
+
+    if writable and (dyn_vals or stat_vals):
+        vals, dyn = dyn_vals or stat_vals, dyn_vals is not None
+        setter = with_input_as(attr_type)(only_set_to(vals, dyn)(setter))
+
+    return property(getter, setter if writable else None)
+
+
+def _IIOChannelIntTime(chan_name):
+
+    attr_name, attr_type = 'integration_time', float
+
+    def getter(self):
+        ch = self.iio_device.find_channel(chan_name)
+        return attr_type(ch.attrs[attr_name].value)
+
+    @only_set_to('INTEGRATION_TIMES_AVAILABLE', dynamic=True)
+    @with_input_as(attr_type)
+    def setter(self, value):
+        ch = self.iio_device.find_channel(chan_name)
+        ch.attrs[attr_name].value = str(value)
+
+    return property(getter, setter)
+
+
+def _setify(x):
+    return {x} if isinstance(x, basestring) else set(x) #Py3: basestring->str
+
+
+class IIOINA226Instrument(object):
+
+    IIO_DEVICE_NAME = 'ina226'
+
+    def __init__(self, iio_device):
+
+        if iio_device.name != self.IIO_DEVICE_NAME:
+            msg = 'IIO device is {}; expected {}'
+            raise TargetError(msg.format(iio_device.name, self.IIO_DEVICE_NAME))
+
+        self.iio_device           = iio_device
+        self.absolute_timestamps  = False
+        self.high_resolution      = True
+        self.buffer_samples_count = None
+        self.buffer_is_circular   = False
+
+        self.collector = None
+        self.work_done = threading.Event()
+        self.collector_exception = None
+
+        self.data = collections.OrderedDict()
+
+        channels = {
+                'timestamp': 'timestamp',
+                'shunt'    : 'voltage0',
+                'voltage'  : 'voltage1', # bus
+                'power'    : 'power2',
+                'current'  : 'current3',
+        }
+        self.computable_channels = {'current' : {'shunt'},
+                                    'power'   : {'shunt', 'voltage'}}
+        self.uncomputable_channels = set(channels) - set(self.computable_channels)
+        self.channels = {k: IIOINA226Channel(self.iio_device.find_channel(v))
+                         for k, v in channels.items()}
+        # We distinguish between "output" channels (as seen by the user of this
+        # class) and "hardware" channels (as requested from the INA226).
+        # This is necessary because of the 'high_resolution' feature which
+        # requires outputting computed channels:
+        self.active_channels = set()  # "hardware" channels
+        self.wanted_channels = set()  # "output" channels
+
+
+    # Properties
+
+    OVERSAMPLING_RATIOS_AVAILABLE = (1, 4, 16, 64, 128, 256, 512, 1024)
+    INTEGRATION_TIMES_AVAILABLE = _IIODeviceAttr('integration_time_available',
+                                                 lambda x: tuple(map(float, x.split())))
+
+    sample_rate_hz     = _IIODeviceAttr('in_sampling_frequency', int)
+    shunt_resistor     = _IIODeviceAttr('in_shunt_resistor'    , int, True)
+    oversampling_ratio = _IIODeviceAttr('in_oversampling_ratio', int, True,
+                                        dyn_vals='OVERSAMPLING_RATIOS_AVAILABLE')
+
+    integration_time_shunt = _IIOChannelIntTime('voltage0')
+    integration_time_bus   = _IIOChannelIntTime('voltage1')
+
+    def list_channels(self):
+        return self.channels.keys()
+
+    def activate(self, channels=None):
+        all_channels = set(self.channels)
+        requested_channels = (all_channels if channels is None
+                              else _setify(channels))
+
+        unknown = ', '.join(requested_channels - all_channels)
+        if unknown:
+            raise ValueError('Unknown channel(s): {}'.format(unknown))
+
+        self.wanted_channels |= requested_channels
+
+    def deactivate(self, channels=None):
+        unwanted_channels = (self.wanted_channels if channels is None
+                             else _setify(channels))
+
+        unknown = ', '.join(unwanted_channels - set(self.channels))
+        if unknown:
+            raise ValueError('Unknown channel(s): {}'.format(unknown))
+
+        unactive = ', '.join(unwanted_channels - self.wanted_channels)
+        if unactive:
+            raise ValueError('Already unactive channel(s): {}'.format(unactive))
+
+        self.wanted_channels -= unwanted_channels
+
+    def sample_collector(self):
+        class Collector(threading.Thread):
+            def run(collector_self):
+                for name, ch in self.channels.items():
+                    ch.iio_channel.enabled = (name in self.active_channels)
+
+                samples_count = self.buffer_samples_count or self.sample_rate_hz
+
+                iio_buffer = iio.Buffer(self.iio_device, samples_count,
+                                        self.buffer_is_circular)
+                # NB: This buffer creates a communication pipe to the
+                #     BeagleBone (or is it between the BBB and the ACME?)
+                #     that locks down any configuration. The IIO drivers
+                #     do not limit access when a buffer exists so that
+                #     configuring the INA226 (i.e. accessing iio.Device.attrs
+                #     or iio.Channel.attrs from iio.Device.channels i.e.
+                #     assigning to or reading from any property of this class
+                #     or calling its setup or reset methods) will screw up the
+                #     whole system and will require rebooting the BBB-ACME board!
+
+                self.collector_exception = None
+                try:
+                    refilled_once = False
+                    while not (refilled_once and self.work_done.is_set()):
+                        refilled_once = True
+                        iio_buffer.refill()
+                        for name in self.active_channels:
+                            self.channels[name].iio_store_buffer_samples(iio_buffer)
+                except Exception as e:
+                    self.collector_exception = e
+                finally:
+                    del iio_buffer
+                    for ch in self.channels.values():
+                        ch.enabled = False
+
+        return Collector()
+
+    def start_capturing(self):
+        if not self.wanted_channels:
+            raise TargetError('No active channel: aborting.')
+
+        self.active_channels = self.wanted_channels.copy()
+        if self.high_resolution:
+            self.active_channels &= self.uncomputable_channels
+            for channel, dependencies in self.computable_channels.items():
+                if channel in self.wanted_channels:
+                    self.active_channels |= dependencies
+
+        self.work_done.clear()
+        self.collector = self.sample_collector()
+        self.collector.daemon = True
+        self.collector.start()
+
+    def stop_capturing(self):
+        self.work_done.set()
+        self.collector.join()
+
+        if self.collector_exception:
+            raise self.collector_exception
+
+        self.data.clear()
+        for channel in self.active_channels:
+            ch = self.channels[channel]
+            self.data[channel] = ch.iio_get_samples(self.absolute_timestamps)
+            ch.iio_forget_samples()
+
+        if self.high_resolution:
+            res_ohm = 1e-6 * self.shunt_resistor
+            current = self.data['shunt'] / res_ohm
+            if 'current' in self.wanted_channels:
+                self.data['current'] = current
+            if 'power' in self.wanted_channels:
+                self.data['power'] = current * self.data['voltage']
+            for channel in set(self.data) - self.wanted_channels:
+                del self.data[channel]
+
+        self.active_channels.clear()
+
+    def get_data(self):
+        return self.data
+
+
+class BaylibreAcmeInstrument(Instrument):
+
+    mode = CONTINUOUS
+
+    MINIMAL_ACME_SD_IMAGE_VERSION    = (2, 1, 3)
+    MINIMAL_ACME_IIO_DRIVERS_VERSION = (0, 6)
+    MINIMAL_HOST_IIO_DRIVERS_VERSION = (0, 15)
+
+    def __init__(self, target=None, iio_context=None,
+                 use_base_iio_context=False, probe_names=None):
+
+        if iio_import_failed:
+            raise HostError('Could not import "iio": {}'.format(iio_import_error))
+
+        super(BaylibreAcmeInstrument, self).__init__(target)
+
+        if isinstance(probe_names, basestring):
+            probe_names = [probe_names]
+
+        self.iio_context = (iio_context if not use_base_iio_context
+                            else iio.Context(iio_context))
+
+        self.check_version()
+
+        if probe_names is not None:
+            if len(probe_names) != len(set(probe_names)):
+                msg = 'Probe names should be unique: {}'
+                raise ValueError(msg.format(probe_names))
+
+            if len(probe_names) != len(self.iio_context.devices):
+                msg = ('There should be as many probe_names ({}) '
+                       'as detected probes ({}).')
+                raise ValueError(msg.format(len(probe_names),
+                                            len(self.iio_context.devices)))
+
+        probes = [IIOINA226Instrument(d) for d in self.iio_context.devices]
+
+        self.probes = (dict(zip(probe_names, probes)) if probe_names
+                       else {p.iio_device.id : p for p in probes})
+        self.active_probes = set()
+
+        for probe in self.probes:
+            for measure in ['voltage', 'power', 'current']:
+                self.add_channel(site=probe, measure=measure)
+        self.add_channel('timestamp', 'time_us')
+
+        self.data = pd.DataFrame()
+
+    def check_version(self):
+        msg = ('The IIO drivers running on {} ({}) are out-of-date; '
+               'devlib requires {} or later.')
+
+        if iio.version[:2] < self.MINIMAL_HOST_IIO_DRIVERS_VERSION:
+            ver_str = '.'.join(map(str, iio.version[:2]))
+            min_str = '.'.join(map(str, self.MINIMAL_HOST_IIO_DRIVERS_VERSION))
+            raise HostError(msg.format('this host', ver_str, min_str))
+
+        if self.version[:2] < self.MINIMAL_ACME_IIO_DRIVERS_VERSION:
+            ver_str = '.'.join(map(str, self.version[:2]))
+            min_str = '.'.join(map(str, self.MINIMAL_ACME_IIO_DRIVERS_VERSION))
+            raise TargetError(msg.format('the BBB', ver_str, min_str))
+
+    # properties
+
+    def probes_unique_property(self, property_name):
+        probes = self.active_probes or self.probes
+        try:
+            # This will fail if there is not exactly one single value:
+            (value,) = {getattr(self.probes[p], property_name) for p in probes}
+        except ValueError:
+            msg = 'Probes have different values for {}.'
+            raise ValueError(msg.format(property_name) if probes else 'No probe')
+        return value
+
+    @property
+    def version(self):
+        return self.iio_context.version
+
+    @property
+    def OVERSAMPLING_RATIOS_AVAILABLE(self):
+        return self.probes_unique_property('OVERSAMPLING_RATIOS_AVAILABLE')
+
+    @property
+    def INTEGRATION_TIMES_AVAILABLE(self):
+        return self.probes_unique_property('INTEGRATION_TIMES_AVAILABLE')
+
+    @property
+    def sample_rate_hz(self):
+        return self.probes_unique_property('sample_rate_hz')
+
+    @sample_rate_hz.setter
+    # This setter is required for compliance with the inherited methods
+    def sample_rate_hz(self, value):
+        if value is not None:
+            raise AttributeError("can't set attribute")
+
+    # initialization and teardown
+
+    def setup(self, shunt_resistor,
+              integration_time_bus,
+              integration_time_shunt,
+              oversampling_ratio,
+              buffer_samples_count=None,
+              buffer_is_circular=False,
+              absolute_timestamps=False,
+              high_resolution=True):
+
+        def pseudo_list(v, i):
+            try:
+                return v[i]
+            except TypeError:
+                return v
+
+        for i, p in enumerate(self.probes.values()):
+            for attr, val in locals().items():
+                if attr != 'self':
+                    setattr(p, attr, pseudo_list(val, i))
+
+        self.absolute_timestamps = all(pseudo_list(absolute_timestamps, i)
+                                       for i in range(len(self.probes)))
+
+    def reset(self, sites=None, kinds=None, channels=None):
+
+        # populate self.active_channels:
+        super(BaylibreAcmeInstrument, self).reset(sites, kinds, channels)
+
+        for ch in self.active_channels:
+            if ch.site != 'timestamp':
+                self.probes[ch.site].activate(['timestamp', ch.kind])
+                self.active_probes.add(ch.site)
+
+    def teardown(self):
+        del self.active_channels[:]
+        self.active_probes.clear()
+
+    def start(self):
+        for p in self.active_probes:
+            self.probes[p].start_capturing()
+
+    def stop(self):
+        for p in self.active_probes:
+            self.probes[p].stop_capturing()
+
+        max_rate_probe = max(self.active_probes,
+                             key=lambda p: self.probes[p].sample_rate_hz)
+
+        probes_dataframes = {
+                probe: pd.DataFrame.from_dict(self.probes[probe].get_data())
+                                   .set_index('timestamp')
+                for probe in self.active_probes
+        }
+
+        for df in probes_dataframes.values():
+            df.set_index(pd.to_datetime(df.index, unit='us'), inplace=True)
+
+        final_index = probes_dataframes[max_rate_probe].index
+
+        df = pd.concat(probes_dataframes, axis=1).sort_index()
+        df.columns = ['_'.join(c).strip() for c in df.columns.values]
+
+        self.data = df.interpolate('time').reindex(final_index)
+
+        if not self.absolute_timestamps:
+            epoch_index = self.data.index.astype(np.int64) // 1000
+            self.data.set_index(epoch_index, inplace=True)
+            # self.data.index is in [us]
+            # columns are in volts, amps and watts
+
+    def get_data(self, outfile=None, **to_csv_kwargs):
+        if outfile is None:
+            return self.data
+
+        self.data.to_csv(outfile, **to_csv_kwargs)
+        return MeasurementsCsv(outfile, self.active_channels)
+
+class BaylibreAcmeLocalInstrument(BaylibreAcmeInstrument):
+
+    def __init__(self, target=None, probe_names=None):
+
+        if iio_import_failed:
+            raise HostError('Could not import "iio": {}'.format(iio_import_error))
+
+        super(BaylibreAcmeLocalInstrument, self).__init__(
+                        target=target,
+                        iio_context=iio.LocalContext(),
+                        probe_names=probe_names
+        )
+
+class BaylibreAcmeXMLInstrument(BaylibreAcmeInstrument):
+
+    def __init__(self, target=None, xmlfile=None, probe_names=None):
+
+        if iio_import_failed:
+            raise HostError('Could not import "iio": {}'.format(iio_import_error))
+
+        super(BaylibreAcmeXMLInstrument, self).__init__(
+                        target=target,
+                        iio_context=iio.XMLContext(xmlfile),
+                        probe_names=probe_names
+        )
+
+class BaylibreAcmeNetworkInstrument(BaylibreAcmeInstrument):
+
+    def __init__(self, target=None, hostname=None, probe_names=None):
+
+        if iio_import_failed:
+            raise HostError('Could not import "iio": {}'.format(iio_import_error))
+
+        super(BaylibreAcmeNetworkInstrument, self).__init__(
+                        target=target,
+                        iio_context=iio.NetworkContext(hostname),
+                        probe_names=probe_names
+        )
+
+        try:
+            self.ssh_connection = SshConnection(hostname, username='root', password=None)
+        except TargetError as e:
+            msg = 'No SSH connexion could be established to {}: {}'
+            self.logger.debug(msg.format(hostname, e))
+            self.ssh_connection = None
+
+    def check_version(self):
+        super(BaylibreAcmeNetworkInstrument, self).check_version()
+
+        cmd = r"""sed -nr 's/^VERSION_ID="(.+)"$/\1/p' < /etc/os-release"""
+        try:
+            ver_str = self._ssh(cmd).rstrip()
+            ver = tuple(map(int, ver_str.split('.')))
+        except Exception as e:
+            self.logger.debug('Unable to verify ACME SD image version through SSH: {}'.format(e))
+        else:
+            if ver < self.MINIMAL_ACME_SD_IMAGE_VERSION:
+                min_str = '.'.join(map(str, self.MINIMAL_ACME_SD_IMAGE_VERSION))
+                msg = ('The ACME SD image for the BBB (ver. {}) is out-of-date; '
+                       'devlib requires {} or later.')
+                raise TargetError(msg.format(ver_str, min_str))
+
+    def _ssh(self, cmd=''):
+        """Connections are assumed to be rare."""
+        if self.ssh_connection is None:
+            raise TargetError('No SSH connection; see log.')
+        return self.ssh_connection.execute(cmd)
+
+    def _reboot(self):
+        """Always delete the object after calling its _reboot method"""
+        try:
+            self._ssh('reboot')
+        except:
+            pass

devlib/instrument/daq.py

@@ -14,20 +14,23 @@
 #
 
 import os
+import shutil
 import tempfile
-from itertools import chain
+import time
+from itertools import chain, zip_longest
 
+from devlib.host import PACKAGE_BIN_DIRECTORY
 from devlib.instrument import Instrument, MeasurementsCsv, CONTINUOUS
 from devlib.exception import HostError
 from devlib.utils.csvutil import csvwriter, create_reader
 from devlib.utils.misc import unique
 
 try:
-    from daqpower.client import execute_command, Status
-    from daqpower.config import DeviceConfiguration, ServerConfiguration
+    from daqpower.client import DaqClient
+    from daqpower.config import DeviceConfiguration
 except ImportError as e:
-    execute_command, Status = None, None
-    DeviceConfiguration, ServerConfiguration, ConfigurationError = None, None, None
+    DaqClient = None
+    DeviceConfiguration = None
     import_error_mesg = e.args[0] if e.args else str(e)
 
 
@@ -44,25 +47,30 @@ class DaqInstrument(Instrument):
                  dv_range=0.2,
                  sample_rate_hz=10000,
                  channel_map=(0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23),
+                 keep_raw=False,
+                 time_as_clock_boottime=True
                  ):
         # pylint: disable=no-member
         super(DaqInstrument, self).__init__(target)
+        self.keep_raw = keep_raw
         self._need_reset = True
         self._raw_files = []
-        if execute_command is None:
+        self.tempdir = None
+        self.target_boottime_clock_at_start = 0.0
+        if DaqClient is None:
             raise HostError('Could not import "daqpower": {}'.format(import_error_mesg))
         if labels is None:
             labels = ['PORT_{}'.format(i) for i in range(len(resistor_values))]
         if len(labels) != len(resistor_values):
             raise ValueError('"labels" and "resistor_values" must be of the same length')
-        self.server_config = ServerConfiguration(host=host,
-                                                 port=port)
-        result = self.execute('list_devices')
-        if result.status == Status.OK:
-            if device_id not in result.data:
-                raise ValueError('Device "{}" is not found on the DAQ server.'.format(device_id))
-        elif result.status != Status.OKISH:
-            raise HostError('Problem querying DAQ server: {}'.format(result.message))
+        self.daq_client = DaqClient(host, port)
+        try:
+            devices = self.daq_client.list_devices()
+            if device_id not in devices:
+                msg = 'Device "{}" is not found on the DAQ server. Available devices are: "{}"'
+                raise ValueError(msg.format(device_id, ', '.join(devices)))
+        except Exception as e:
+            raise HostError('Problem querying DAQ server: {}'.format(e))
 
         self.device_config = DeviceConfiguration(device_id=device_id,
                                                  v_range=v_range,
@@ -72,36 +80,63 @@ class DaqInstrument(Instrument):
                                                  channel_map=channel_map,
                                                  labels=labels)
         self.sample_rate_hz = sample_rate_hz
+        self.time_as_clock_boottime = time_as_clock_boottime
 
+        self.add_channel('Time', 'time')
         for label in labels:
             for kind in ['power', 'voltage']:
                 self.add_channel(label, kind)
 
+        if time_as_clock_boottime:
+            host_path = os.path.join(PACKAGE_BIN_DIRECTORY, self.target.abi,
+                                     'get_clock_boottime')
+            self.clock_boottime_cmd = self.target.install_if_needed(host_path,
+                                                                    search_system_binaries=False)
+
+    def calculate_boottime_offset(self):
+        time_before = time.time()
+        out = self.target.execute(self.clock_boottime_cmd)
+        time_after = time.time()
+
+        remote_clock_boottime = float(out)
+        propagation_delay = (time_after - time_before) / 2
+        boottime_at_end = remote_clock_boottime + propagation_delay
+
+        return time_after - boottime_at_end
+
     def reset(self, sites=None, kinds=None, channels=None):
         super(DaqInstrument, self).reset(sites, kinds, channels)
-        self.execute('close')
-        result = self.execute('configure', config=self.device_config)
-        if not result.status == Status.OK:  # pylint: disable=no-member
-            raise HostError(result.message)
+        self.daq_client.close()
+        self.daq_client.configure(self.device_config)
         self._need_reset = False
         self._raw_files = []
 
     def start(self):
         if self._need_reset:
-            self.reset()
-        self.execute('start')
+            # Preserve channel order
+            self.reset(channels=self.channels.keys())
+
+        if self.time_as_clock_boottime:
+            target_boottime_offset = self.calculate_boottime_offset()
+            time_start = time.time()
+
+        self.daq_client.start()
+
+        if self.time_as_clock_boottime:
+            time_end = time.time()
+            self.target_boottime_clock_at_start = (time_start + time_end) / 2 - target_boottime_offset
 
     def stop(self):
-        self.execute('stop')
+        self.daq_client.stop()
         self._need_reset = True
 
     def get_data(self, outfile):  # pylint: disable=R0914
-        tempdir = tempfile.mkdtemp(prefix='daq-raw-')
-        self.execute('get_data', output_directory=tempdir)
+        self.tempdir = tempfile.mkdtemp(prefix='daq-raw-')
+        self.daq_client.get_data(self.tempdir)
         raw_file_map = {}
-        for entry in os.listdir(tempdir):
+        for entry in os.listdir(self.tempdir):
             site = os.path.splitext(entry)[0]
-            path = os.path.join(tempdir, entry)
+            path = os.path.join(self.tempdir, entry)
             raw_file_map[site] = path
             self._raw_files.append(path)
 
@@ -116,32 +151,32 @@ class DaqInstrument(Instrument):
                     site_readers[site] = reader
                     file_handles.append(fh)
                 except KeyError:
-                    message = 'Could not get DAQ trace for {}; Obtained traces are in {}'
-                    raise HostError(message.format(site, tempdir))
+                    if not site.startswith("Time"):
+                        message = 'Could not get DAQ trace for {}; Obtained traces are in {}'
+                        raise HostError(message.format(site, self.tempdir))
 
             # The first row is the headers
-            channel_order = []
+            channel_order = ['Time_time']
             for site, reader in site_readers.items():
                 channel_order.extend(['{}_{}'.format(site, kind)
                                       for kind in next(reader)])
 
-            def _read_next_rows():
-                parts = []
-                for reader in site_readers.values():
-                    try:
-                        parts.extend(next(reader))
-                    except StopIteration:
-                        parts.extend([None, None])
-                return list(chain(parts))
+            def _read_rows():
+                row_iter = zip_longest(*site_readers.values(), fillvalue=(None, None))
+                for raw_row in row_iter:
+                    raw_row = list(chain.from_iterable(raw_row))
+                    raw_row.insert(0, _read_rows.row_time_s)
+                    yield raw_row
+                    _read_rows.row_time_s += 1.0 / self.sample_rate_hz
+
+            _read_rows.row_time_s = self.target_boottime_clock_at_start
 
             with csvwriter(outfile) as writer:
                 field_names = [c.label for c in self.active_channels]
                 writer.writerow(field_names)
-                raw_row = _read_next_rows()
-                while any(raw_row):
+                for raw_row in _read_rows():
                     row = [raw_row[channel_order.index(f)] for f in field_names]
                     writer.writerow(row)
-                    raw_row = _read_next_rows()
 
             return MeasurementsCsv(outfile, self.active_channels, self.sample_rate_hz)
         finally:
@@ -152,8 +187,7 @@ class DaqInstrument(Instrument):
         return self._raw_files
 
     def teardown(self):
-        self.execute('close')
-
-    def execute(self, command, **kwargs):
-        return execute_command(self.server_config, command, **kwargs)
-
+        self.daq_client.close()
+        if not self.keep_raw:
+            if self.tempdir and os.path.isdir(self.tempdir):
+                shutil.rmtree(self.tempdir)

devlib/instrument/energy_probe.py

@@ -19,6 +19,7 @@ import tempfile
 import struct
 import subprocess
 import sys
+from pipes import quote
 
 from devlib.instrument import Instrument, CONTINUOUS, MeasurementsCsv
 from devlib.exception import HostError
@@ -33,9 +34,11 @@ class EnergyProbeInstrument(Instrument):
     def __init__(self, target, resistor_values,
                  labels=None,
                  device_entry='/dev/ttyACM0',
+                 keep_raw=False
                  ):
         super(EnergyProbeInstrument, self).__init__(target)
         self.resistor_values = resistor_values
+        self.keep_raw = keep_raw
         if labels is not None:
             self.labels = labels
         else:
@@ -65,7 +68,10 @@ class EnergyProbeInstrument(Instrument):
         parts = ['-r {}:{} '.format(i, int(1000 * rval))
                  for i, rval in enumerate(self.resistor_values)]
         rstring = ''.join(parts)
-        self.command = '{} -d {} -l {} {}'.format(self.caiman, self.device_entry, rstring, self.raw_output_directory)
+        self.command = '{} -d {} -l {} {}'.format(
+            quote(self.caiman), quote(self.device_entry),
+            rstring, quote(self.raw_output_directory)
+        )
         self.raw_data_file = None
 
     def start(self):
@@ -82,8 +88,8 @@ class EnergyProbeInstrument(Instrument):
         if self.process.returncode is not None:
             stdout, stderr = self.process.communicate()
             if sys.version_info[0] == 3:
-                stdout = stdout.decode(sys.stdout.encoding, 'replace')
-                stderr = stderr.decode(sys.stdout.encoding, 'replace')
+                stdout = stdout.decode(sys.stdout.encoding or 'utf-8', 'replace')
+                stderr = stderr.decode(sys.stdout.encoding or 'utf-8', 'replace')
             raise HostError(
                 'Energy Probe: Caiman exited unexpectedly with exit code {}.\n'
                 'stdout:\n{}\nstderr:\n{}'.format(self.process.returncode,
@@ -114,7 +120,7 @@ class EnergyProbeInstrument(Instrument):
                         writer.writerow(row)
                     except struct.error:
                         if not_a_full_row_seen:
-                            self.logger.warn('possibly missaligned caiman raw data, row contained {} bytes'.format(len(data)))
+                            self.logger.warning('possibly missaligned caiman raw data, row contained {} bytes'.format(len(data)))
                             continue
                         else:
                             not_a_full_row_seen = True
@@ -122,3 +128,8 @@ class EnergyProbeInstrument(Instrument):
 
     def get_raw(self):
         return [self.raw_data_file]
+
+    def teardown(self):
+        if self.keep_raw:
+            if os.path.isfile(self.raw_data_file):
+                os.remove(self.raw_data_file)

devlib/instrument/frames.py

@@ -14,6 +14,8 @@
 #
 
 from __future__ import division
+import os
+
 from devlib.instrument import (Instrument, CONTINUOUS,
                                MeasurementsCsv, MeasurementType)
 from devlib.utils.rendering import (GfxinfoFrameCollector,
@@ -41,6 +43,7 @@ class FramesInstrument(Instrument):
 
     def reset(self, sites=None, kinds=None, channels=None):
         super(FramesInstrument, self).reset(sites, kinds, channels)
+        # pylint: disable=not-callable
         self.collector = self.collector_cls(self.target, self.period,
                                             self.collector_target, self.header)
         self._need_reset = False
@@ -69,6 +72,11 @@ class FramesInstrument(Instrument):
     def _init_channels(self):
         raise NotImplementedError()
 
+    def teardown(self):
+        if not self.keep_raw:
+            if os.path.isfile(self._raw_file):
+                os.remove(self._raw_file)
+
 
 class GfxInfoFramesInstrument(FramesInstrument):
 
@@ -81,7 +89,7 @@ class GfxInfoFramesInstrument(FramesInstrument):
             if entry == 'Flags':
                 self.add_channel('Flags', MeasurementType('flags', 'flags'))
             else:
-                self.add_channel(entry, 'time_us')
+                self.add_channel(entry, 'time_ns')
         self.header = [chan.label for chan in self.channels.values()]
 
 

devlib/instrument/gem5power.py

@@ -13,11 +13,10 @@
 # limitations under the License.
 
 from __future__ import division
-import re
 
 from devlib.platform.gem5 import Gem5SimulationPlatform
 from devlib.instrument import Instrument, CONTINUOUS, MeasurementsCsv
-from devlib.exception import TargetError, HostError
+from devlib.exception import TargetStableError
 from devlib.utils.csvutil import csvwriter
 
 
@@ -37,9 +36,9 @@ class Gem5PowerInstrument(Instrument):
             system.cluster0.cores0.power_model.static_power
         '''
         if not isinstance(target.platform, Gem5SimulationPlatform):
-            raise TargetError('Gem5PowerInstrument requires a gem5 platform')
+            raise TargetStableError('Gem5PowerInstrument requires a gem5 platform')
         if not target.has('gem5stats'):
-            raise TargetError('Gem5StatsModule is not loaded')
+            raise TargetStableError('Gem5StatsModule is not loaded')
         super(Gem5PowerInstrument, self).__init__(target)
 
         # power_sites is assumed to be a list later
@@ -69,7 +68,7 @@ class Gem5PowerInstrument(Instrument):
         with csvwriter(outfile) as writer:
             writer.writerow([c.label for c in self.active_channels]) # headers
             sites_to_match = [self.site_mapping.get(s, s) for s in active_sites]
-            for rec, rois in self.target.gem5stats.match_iter(sites_to_match,
+            for rec, _ in self.target.gem5stats.match_iter(sites_to_match,
                     [self.roi_label], self._base_stats_dump):
                 writer.writerow([rec[s] for s in sites_to_match])
         return MeasurementsCsv(outfile, self.active_channels, self.sample_rate_hz)
@@ -77,4 +76,3 @@ class Gem5PowerInstrument(Instrument):
     def reset(self, sites=None, kinds=None, channels=None):
         super(Gem5PowerInstrument, self).reset(sites, kinds, channels)
         self._base_stats_dump = self.target.gem5stats.next_dump_no()
-

devlib/instrument/hwmon.py

@@ -16,7 +16,7 @@ from __future__ import division
 import re
 
 from devlib.instrument import Instrument, Measurement, INSTANTANEOUS
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 
 
 class HwmonInstrument(Instrument):
@@ -35,7 +35,7 @@ class HwmonInstrument(Instrument):
 
     def __init__(self, target):
         if not hasattr(target, 'hwmon'):
-            raise TargetError('Target does not support HWMON')
+            raise TargetStableError('Target does not support HWMON')
         super(HwmonInstrument, self).__init__(target)
 
         self.logger.debug('Discovering available HWMON sensors...')

devlib/instrument/monsoon.py

@@ -21,12 +21,11 @@ from tempfile import NamedTemporaryFile
 
 from devlib.instrument import Instrument, CONTINUOUS, MeasurementsCsv
 from devlib.exception import HostError
-from devlib.host import PACKAGE_BIN_DIRECTORY
 from devlib.utils.csvutil import csvwriter
 from devlib.utils.misc import which
 
 
-INSTALL_INSTRUCTIONS="""
+INSTALL_INSTRUCTIONS = """
 MonsoonInstrument requires the monsoon.py tool, available from AOSP:
 
 https://android.googlesource.com/platform/cts/+/master/tools/utils/monsoon.py
@@ -68,6 +67,7 @@ class MonsoonInstrument(Instrument):
 
         self.process = None
         self.output = None
+        self.buffer_file = None
 
         self.sample_rate_hz = 500
         self.add_channel('output', 'power')
@@ -101,8 +101,8 @@ class MonsoonInstrument(Instrument):
         if process.returncode is not None:
             stdout, stderr = process.communicate()
             if sys.version_info[0] == 3:
-                stdout = stdout.encode(sys.stdout.encoding)
-                stderr = stderr.encode(sys.stdout.encoding)
+                stdout = stdout.encode(sys.stdout.encoding or 'utf-8')
+                stderr = stderr.encode(sys.stdout.encoding or 'utf-8')
             raise HostError(
                 'Monsoon script exited unexpectedly with exit code {}.\n'
                 'stdout:\n{}\nstderr:\n{}'.format(process.returncode,
@@ -110,7 +110,7 @@ class MonsoonInstrument(Instrument):
 
         process.send_signal(signal.SIGINT)
 
-        stderr =  process.stderr.read()
+        stderr = process.stderr.read()
 
         self.buffer_file.close()
         with open(self.buffer_file.name) as f:
@@ -124,7 +124,7 @@ class MonsoonInstrument(Instrument):
         if self.process:
             raise RuntimeError('`get_data` called before `stop`')
 
-        stdout, stderr = self.output
+        stdout, _ = self.output
 
         with csvwriter(outfile) as writer:
             active_sites = [c.site for c in self.active_channels]

devlib/instrument/netstats/__init__.py

@@ -22,7 +22,7 @@ from collections import defaultdict
 from future.moves.itertools import zip_longest
 
 from devlib.instrument import Instrument, MeasurementsCsv, CONTINUOUS
-from devlib.exception import TargetError, HostError
+from devlib.exception import TargetStableError, HostError
 from devlib.utils.android import ApkInfo
 from devlib.utils.csvutil import csvwriter
 
@@ -84,7 +84,7 @@ class NetstatsInstrument(Instrument):
 
         """
         if target.os != 'android':
-            raise TargetError('netstats insturment only supports Android targets')
+            raise TargetStableError('netstats instrument only supports Android targets')
         if apk is None:
             apk = os.path.join(THIS_DIR, 'netstats.apk')
         if not os.path.isfile(apk):
@@ -101,6 +101,7 @@ class NetstatsInstrument(Instrument):
             self.add_channel(package, 'tx')
             self.add_channel(package, 'rx')
 
+    # pylint: disable=keyword-arg-before-vararg,arguments-differ
     def setup(self, force=False, *args, **kwargs):
         if self.target.package_is_installed(self.package):
             if force:

devlib/module/__init__.py

@@ -37,6 +37,9 @@ class Module(object):
     #             serial).
     #  'connected' -- installed when a connection to to the target has been
     #                 established. This is the default.
+    #   'setup' -- installed after initial setup of the device has been performed.
+    #              This allows the module to utilize assets deployed during the
+    #              setup stage for example 'Busybox'.
     stage = 'connected'
 
     @staticmethod
@@ -61,7 +64,7 @@ class Module(object):
         self.logger = logging.getLogger(self.name)
 
 
-class HardRestModule(Module):  # pylint: disable=R0921
+class HardRestModule(Module):
 
     kind = 'hard_reset'
 
@@ -69,7 +72,7 @@ class HardRestModule(Module):  # pylint: disable=R0921
         raise NotImplementedError()
 
 
-class BootModule(Module):  # pylint: disable=R0921
+class BootModule(Module):
 
     kind = 'boot'
 
@@ -88,7 +91,7 @@ class FlashModule(Module):
 
     kind = 'flash'
 
-    def __call__(self, image_bundle=None, images=None, boot_config=None):
+    def __call__(self, image_bundle=None, images=None, boot_config=None, connect=True):
         raise NotImplementedError()
 
 

devlib/module/android.py

@@ -54,7 +54,7 @@ class FastbootFlashModule(FlashModule):
     def probe(target):
         return target.os == 'android'
 
-    def __call__(self, image_bundle=None, images=None, bootargs=None):
+    def __call__(self, image_bundle=None, images=None, bootargs=None, connect=True):
         if bootargs:
             raise ValueError('{} does not support boot configuration'.format(self.name))
         self.prelude_done = False
@@ -67,7 +67,8 @@ class FastbootFlashModule(FlashModule):
             self.logger.debug('flashing {}'.format(partition))
             self._flash_image(self.target, partition, expand_path(image_path))
         fastboot_command('reboot')
-        self.target.connect(timeout=180)
+        if connect:
+            self.target.connect(timeout=180)
 
     def _validate_image_bundle(self, image_bundle):
         if not tarfile.is_tarfile(image_bundle):
@@ -125,4 +126,3 @@ def get_mapping(base_dir, partition_file):
                 HostError('file {} was not found in the bundle or was misplaced'.format(pair[1]))
             mapping[pair[0]] = image_path
     return mapping
-

devlib/module/biglittle.py

@@ -60,150 +60,150 @@ class BigLittleModule(Module):
 
     def list_bigs_frequencies(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.list_frequencies(bigs_online[0])
 
     def list_bigs_governors(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.list_governors(bigs_online[0])
 
     def list_bigs_governor_tunables(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.list_governor_tunables(bigs_online[0])
 
     def list_littles_frequencies(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.list_frequencies(littles_online[0])
 
     def list_littles_governors(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.list_governors(littles_online[0])
 
     def list_littles_governor_tunables(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.list_governor_tunables(littles_online[0])
 
     def get_bigs_governor(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.get_governor(bigs_online[0])
 
     def get_bigs_governor_tunables(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.get_governor_tunables(bigs_online[0])
 
     def get_bigs_frequency(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.get_frequency(bigs_online[0])
 
     def get_bigs_min_frequency(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.get_min_frequency(bigs_online[0])
 
     def get_bigs_max_frequency(self):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             return self.target.cpufreq.get_max_frequency(bigs_online[0])
 
     def get_littles_governor(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.get_governor(littles_online[0])
 
     def get_littles_governor_tunables(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.get_governor_tunables(littles_online[0])
 
     def get_littles_frequency(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.get_frequency(littles_online[0])
 
     def get_littles_min_frequency(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.get_min_frequency(littles_online[0])
 
     def get_littles_max_frequency(self):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             return self.target.cpufreq.get_max_frequency(littles_online[0])
 
     def set_bigs_governor(self, governor, **kwargs):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             self.target.cpufreq.set_governor(bigs_online[0], governor, **kwargs)
         else:
             raise ValueError("All bigs appear to be offline")
 
     def set_bigs_governor_tunables(self, governor, **kwargs):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             self.target.cpufreq.set_governor_tunables(bigs_online[0], governor, **kwargs)
         else:
             raise ValueError("All bigs appear to be offline")
 
     def set_bigs_frequency(self, frequency, exact=True):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             self.target.cpufreq.set_frequency(bigs_online[0], frequency, exact)
         else:
             raise ValueError("All bigs appear to be offline")
 
     def set_bigs_min_frequency(self, frequency, exact=True):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             self.target.cpufreq.set_min_frequency(bigs_online[0], frequency, exact)
         else:
             raise ValueError("All bigs appear to be offline")
 
     def set_bigs_max_frequency(self, frequency, exact=True):
         bigs_online = self.bigs_online
-        if len(bigs_online) > 0:
+        if bigs_online:
             self.target.cpufreq.set_max_frequency(bigs_online[0], frequency, exact)
         else:
             raise ValueError("All bigs appear to be offline")
 
     def set_littles_governor(self, governor, **kwargs):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             self.target.cpufreq.set_governor(littles_online[0], governor, **kwargs)
         else:
             raise ValueError("All littles appear to be offline")
 
     def set_littles_governor_tunables(self, governor, **kwargs):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             self.target.cpufreq.set_governor_tunables(littles_online[0], governor, **kwargs)
         else:
             raise ValueError("All littles appear to be offline")
 
     def set_littles_frequency(self, frequency, exact=True):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             self.target.cpufreq.set_frequency(littles_online[0], frequency, exact)
         else:
             raise ValueError("All littles appear to be offline")
 
     def set_littles_min_frequency(self, frequency, exact=True):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             self.target.cpufreq.set_min_frequency(littles_online[0], frequency, exact)
         else:
             raise ValueError("All littles appear to be offline")
 
     def set_littles_max_frequency(self, frequency, exact=True):
         littles_online = self.littles_online
-        if len(littles_online) > 0:
+        if littles_online:
             self.target.cpufreq.set_max_frequency(littles_online[0], frequency, exact)
         else:
             raise ValueError("All littles appear to be offline")

devlib/module/cgroups.py

@@ -16,9 +16,12 @@
 import logging
 import re
 from collections import namedtuple
+from shlex import quote
+import itertools
+import warnings
 
 from devlib.module import Module
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 from devlib.utils.misc import list_to_ranges, isiterable
 from devlib.utils.types import boolean
 
@@ -121,18 +124,34 @@ class Controller(object):
             cgroups.append(cg)
         return cgroups
 
-    def move_tasks(self, source, dest, exclude=[]):
-        try:
-            srcg = self._cgroups[source]
-            dstg = self._cgroups[dest]
-        except KeyError as e:
-            raise ValueError('Unkown group: {}'.format(e))
-        output = self.target._execute_util(
-                    'cgroups_tasks_move {} {} \'{}\''.format(
-                    srcg.directory, dstg.directory, exclude),
-                    as_root=True)
+    def move_tasks(self, source, dest, exclude=None):
+        if isinstance(exclude, str):
+            warnings.warn("Controller.move_tasks() takes needs a _list_ of exclude patterns, not a string", DeprecationWarning)
+            exclude = [exclude]
 
-    def move_all_tasks_to(self, dest, exclude=[]):
+        if exclude is None:
+            exclude = []
+
+        exclude = ' '.join(
+            itertools.chain.from_iterable(
+                ('-e', quote(pattern))
+                for pattern in exclude
+            )
+        )
+
+        srcg = self.cgroup(source)
+        dstg = self.cgroup(dest)
+
+        self.target._execute_util(  # pylint: disable=protected-access
+            'cgroups_tasks_move {src} {dst} {exclude}'.format(
+                src=quote(srcg.directory),
+                dst=quote(dstg.directory),
+                exclude=exclude,
+            ),
+            as_root=True,
+        )
+
+    def move_all_tasks_to(self, dest, exclude=None):
         """
         Move all the tasks to the specified CGroup
 
@@ -145,8 +164,10 @@ class Controller(object):
         tasks.
 
         :param exclude: list of commands to keep in the root CGroup
-        :type exlude: list(str)
+        :type exclude: list(str)
         """
+        if exclude is None:
+            exclude = []
 
         if isinstance(exclude, str):
             exclude = [exclude]
@@ -154,21 +175,16 @@ class Controller(object):
             raise ValueError('wrong type for "exclude" parameter, '
                              'it must be a str or a list')
 
-        logging.debug('Moving all tasks into %s', dest)
+        self.logger.debug('Moving all tasks into %s', dest)
 
         # Build list of tasks to exclude
-        grep_filters = ''
-        for comm in exclude:
-            grep_filters += '-e {} '.format(comm)
-        logging.debug('   using grep filter: %s', grep_filters)
-        if grep_filters != '':
-            logging.debug('   excluding tasks which name matches:')
-            logging.debug('   %s', ', '.join(exclude))
+        self.logger.debug('   using grep filter: %s', exclude)
 
-        for cgroup in self._cgroups:
+        for cgroup in self.list_all():
             if cgroup != dest:
-                self.move_tasks(cgroup, dest, grep_filters)
+                self.move_tasks(cgroup, dest, exclude)
 
+    # pylint: disable=too-many-locals
     def tasks(self, cgroup,
               filter_tid='',
               filter_tname='',
@@ -203,8 +219,8 @@ class Controller(object):
         try:
             cg = self._cgroups[cgroup]
         except KeyError as e:
-            raise ValueError('Unkown group: {}'.format(e))
-        output = self.target._execute_util(
+            raise ValueError('Unknown group: {}'.format(e))
+        output = self.target._execute_util(  # pylint: disable=protected-access
                     'cgroups_tasks_in {}'.format(cg.directory),
                     as_root=True)
         entries = output.splitlines()
@@ -234,7 +250,7 @@ class Controller(object):
         try:
             cg = self._cgroups[cgroup]
         except KeyError as e:
-            raise ValueError('Unkown group: {}'.format(e))
+            raise ValueError('Unknown group: {}'.format(e))
         output = self.target.execute(
                     '{} wc -l {}/tasks'.format(
                     self.target.busybox, cg.directory),
@@ -257,8 +273,9 @@ class CGroup(object):
 
         # Control cgroup path
         self.directory = controller.mount_point
+
         if name != '/':
-            self.directory = self.target.path.join(controller.mount_point, name[1:])
+            self.directory = self.target.path.join(controller.mount_point, name.strip('/'))
 
         # Setup path for tasks file
         self.tasks_file = self.target.path.join(self.directory, 'tasks')
@@ -276,17 +293,15 @@ class CGroup(object):
             self.target.execute('[ -d {0} ]'\
                 .format(self.directory), as_root=True)
             return True
-        except TargetError:
+        except TargetStableError:
             return False
 
     def get(self):
         conf = {}
 
-        logging.debug('Reading %s attributes from:',
-                self.controller.kind)
-        logging.debug('  %s',
-                self.directory)
-        output = self.target._execute_util(
+        self.logger.debug('Reading %s attributes from:', self.controller.kind)
+        self.logger.debug('  %s', self.directory)
+        output = self.target._execute_util(  # pylint: disable=protected-access
                     'cgroups_get_attributes {} {}'.format(
                     self.directory, self.controller.kind),
                     as_root=True)
@@ -302,7 +317,7 @@ class CGroup(object):
             if isiterable(attrs[idx]):
                 attrs[idx] = list_to_ranges(attrs[idx])
             # Build attribute path
-            if self.controller._noprefix:
+            if self.controller._noprefix:  # pylint: disable=protected-access
                 attr_name = '{}'.format(idx)
             else:
                 attr_name = '{}.{}'.format(self.controller.kind, idx)
@@ -314,7 +329,7 @@ class CGroup(object):
             # Set the attribute value
             try:
                 self.target.write_value(path, attrs[idx])
-            except TargetError:
+            except TargetStableError:
                 # Check if the error is due to a non-existing attribute
                 attrs = self.get()
                 if idx not in attrs:
@@ -324,7 +339,7 @@ class CGroup(object):
 
     def get_tasks(self):
         task_ids = self.target.read_value(self.tasks_file).split()
-        logging.debug('Tasks: %s', task_ids)
+        self.logger.debug('Tasks: %s', task_ids)
         return list(map(int, task_ids))
 
     def add_task(self, tid):
@@ -363,7 +378,7 @@ class CgroupsModule(Module):
 
         # Get the list of the available controllers
         subsys = self.list_subsystems()
-        if len(subsys) == 0:
+        if not subsys:
             self.logger.warning('No CGroups controller available')
             return
 
@@ -384,9 +399,9 @@ class CgroupsModule(Module):
             controller = Controller(ss.name, hid, hierarchy[hid])
             try:
                 controller.mount(self.target, self.cgroup_root)
-            except TargetError:
+            except TargetStableError:
                 message = 'Failed to mount "{}" controller'
-                raise TargetError(message.format(controller.kind))
+                raise TargetStableError(message.format(controller.kind))
             self.logger.info('  %-12s : %s', controller.kind,
                              controller.mount_point)
             self.controllers[ss.name] = controller
@@ -420,20 +435,27 @@ class CgroupsModule(Module):
         :param cgroup: Name of cgroup to run command into
         :returns: A command to run `cmdline` into `cgroup`
         """
+        if not cgroup.startswith('/'):
+            message = 'cgroup name "{}" must start with "/"'.format(cgroup)
+            raise ValueError(message)
         return 'CGMOUNT={} {} cgroups_run_into {} {}'\
                 .format(self.cgroup_root, self.target.shutils,
                         cgroup, cmdline)
 
-    def run_into(self, cgroup, cmdline):
+    def run_into(self, cgroup, cmdline, as_root=None):
         """
         Run the specified command into the specified CGroup
 
         :param cmdline: Command to be run into cgroup
         :param cgroup: Name of cgroup to run command into
+        :param as_root: Specify whether to run the command as root, if not
+                        specified will default to whether the target is rooted.
         :returns: Output of command.
         """
+        if as_root is None:
+            as_root = self.target.is_rooted
         cmd = self.run_into_cmd(cgroup, cmdline)
-        raw_output = self.target.execute(cmd)
+        raw_output = self.target.execute(cmd, as_root=as_root)
 
         # First line of output comes from shutils; strip it out.
         return raw_output.split('\n', 1)[1]
@@ -444,11 +466,11 @@ class CgroupsModule(Module):
         A regexps of tasks names can be used to defined tasks which should not
         be moved.
         """
-        return self.target._execute_util(
+        return self.target._execute_util(  # pylint: disable=protected-access
             'cgroups_tasks_move {} {} {}'.format(srcg, dstg, exclude),
             as_root=True)
 
-    def isolate(self, cpus, exclude=[]):
+    def isolate(self, cpus, exclude=None):
         """
         Remove all userspace tasks from specified CPUs.
 
@@ -465,6 +487,8 @@ class CgroupsModule(Module):
                  sandbox is the CGroup of sandboxed CPUs
                  isolated is the CGroup of isolated CPUs
         """
+        if exclude is None:
+            exclude = []
         all_cpus = set(range(self.target.number_of_cpus))
         sbox_cpus = list(all_cpus - set(cpus))
         isol_cpus = list(all_cpus - set(sbox_cpus))
@@ -483,7 +507,7 @@ class CgroupsModule(Module):
 
         return sbox_cg, isol_cg
 
-    def freeze(self, exclude=[], thaw=False):
+    def freeze(self, exclude=None, thaw=False):
         """
         Freeze all user-space tasks but the specified ones
 
@@ -501,6 +525,9 @@ class CgroupsModule(Module):
         :type thaw: bool
         """
 
+        if exclude is None:
+            exclude = []
+
         # Create Freezer CGroup
         freezer = self.controller('freezer')
         if freezer is None:
@@ -509,7 +536,8 @@ class CgroupsModule(Module):
         cmd = 'cgroups_freezer_set_state {{}} {}'.format(freezer_cg.directory)
 
         if thaw:
-            # Restart froozen tasks
+            # Restart frozen tasks
+            # pylint: disable=protected-access
             freezer.target._execute_util(cmd.format('THAWED'), as_root=True)
             # Remove all tasks from freezer
             freezer.move_all_tasks_to('/')
@@ -522,7 +550,7 @@ class CgroupsModule(Module):
         tasks = freezer.tasks('/')
 
         # Freeze all tasks
+        # pylint: disable=protected-access
         freezer.target._execute_util(cmd.format('FROZEN'), as_root=True)
 
         return tasks
-

devlib/module/cooling.py

@@ -37,12 +37,14 @@ class MbedFanActiveCoolingModule(Module):
         with open_serial_connection(timeout=self.timeout,
                                     port=self.port,
                                     baudrate=self.baud) as target:
+            # pylint: disable=no-member
             target.sendline('motor_{}_1'.format(self.fan_pin))
 
     def stop(self):
         with open_serial_connection(timeout=self.timeout,
                                     port=self.port,
                                     baudrate=self.baud) as target:
+            # pylint: disable=no-member
             target.sendline('motor_{}_0'.format(self.fan_pin))
 
 

devlib/module/cpufreq.py

@@ -12,8 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from contextlib import contextmanager
+
 from devlib.module import Module
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 from devlib.utils.misc import memoized
 
 
@@ -82,7 +84,7 @@ class CpufreqModule(Module):
                Setting the governor on any core in a cluster will also set it on all
                other cores in that cluster.
 
-        :raises: TargetError if governor is not supported by the CPU, or if,
+        :raises: TargetStableError if governor is not supported by the CPU, or if,
                  for some reason, the governor could not be set.
 
         """
@@ -90,11 +92,52 @@ class CpufreqModule(Module):
             cpu = 'cpu{}'.format(cpu)
         supported = self.list_governors(cpu)
         if governor not in supported:
-            raise TargetError('Governor {} not supported for cpu {}'.format(governor, cpu))
+            raise TargetStableError('Governor {} not supported for cpu {}'.format(governor, cpu))
         sysfile = '/sys/devices/system/cpu/{}/cpufreq/scaling_governor'.format(cpu)
         self.target.write_value(sysfile, governor)
         self.set_governor_tunables(cpu, governor, **kwargs)
 
+    @contextmanager
+    def use_governor(self, governor, cpus=None, **kwargs):
+        """
+        Use a given governor, then restore previous governor(s)
+
+        :param governor: Governor to use on all targeted CPUs (see :meth:`set_governor`)
+        :type governor: str
+
+        :param cpus: CPUs affected by the governor change (all by default)
+        :type cpus: list
+
+        :Keyword Arguments: Governor tunables, See :meth:`set_governor_tunables`
+        """
+        if not cpus:
+            cpus = self.target.list_online_cpus()
+
+        # Setting a governor & tunables for a cpu will set them for all cpus
+        # in the same clock domain, so only manipulating one cpu per domain
+        # is enough
+        domains = set(self.get_affected_cpus(cpu)[0] for cpu in cpus)
+        prev_governors = {cpu : (self.get_governor(cpu), self.get_governor_tunables(cpu))
+                          for cpu in domains}
+
+        # Special case for userspace, frequency is not seen as a tunable
+        userspace_freqs = {}
+        for cpu, (prev_gov, _) in prev_governors.items():
+            if prev_gov == "userspace":
+                userspace_freqs[cpu] = self.get_frequency(cpu)
+
+        for cpu in domains:
+            self.set_governor(cpu, governor, **kwargs)
+
+        try:
+            yield
+
+        finally:
+            for cpu, (prev_gov, tunables) in prev_governors.items():
+                self.set_governor(cpu, prev_gov, **tunables)
+                if prev_gov == "userspace":
+                    self.set_frequency(cpu, userspace_freqs[cpu])
+
     def list_governor_tunables(self, cpu):
         """Returns a list of tunables available for the governor on the specified CPU."""
         if isinstance(cpu, int):
@@ -104,11 +147,11 @@ class CpufreqModule(Module):
             try:
                 tunables_path = '/sys/devices/system/cpu/{}/cpufreq/{}'.format(cpu, governor)
                 self._governor_tunables[governor] = self.target.list_directory(tunables_path)
-            except TargetError:  # probably an older kernel
+            except TargetStableError:  # probably an older kernel
                 try:
                     tunables_path = '/sys/devices/system/cpu/cpufreq/{}'.format(governor)
                     self._governor_tunables[governor] = self.target.list_directory(tunables_path)
-                except TargetError:  # governor does not support tunables
+                except TargetStableError:  # governor does not support tunables
                     self._governor_tunables[governor] = []
         return self._governor_tunables[governor]
 
@@ -122,7 +165,7 @@ class CpufreqModule(Module):
                 try:
                     path = '/sys/devices/system/cpu/{}/cpufreq/{}/{}'.format(cpu, governor, tunable)
                     tunables[tunable] = self.target.read_value(path)
-                except TargetError:  # May be an older kernel
+                except TargetStableError:  # May be an older kernel
                     path = '/sys/devices/system/cpu/cpufreq/{}/{}'.format(governor, tunable)
                     tunables[tunable] = self.target.read_value(path)
         return tunables
@@ -140,7 +183,7 @@ class CpufreqModule(Module):
         The rest should be keyword parameters mapping tunable name onto the value to
         be set for it.
 
-        :raises: TargetError if governor specified is not a valid governor name, or if
+        :raises: TargetStableError if governor specified is not a valid governor name, or if
                  a tunable specified is not valid for the governor, or if could not set
                  tunable.
 
@@ -155,7 +198,7 @@ class CpufreqModule(Module):
                 path = '/sys/devices/system/cpu/{}/cpufreq/{}/{}'.format(cpu, governor, tunable)
                 try:
                     self.target.write_value(path, value)
-                except TargetError:
+                except TargetStableError:
                     if self.target.file_exists(path):
                         # File exists but we did something wrong
                         raise
@@ -165,11 +208,11 @@ class CpufreqModule(Module):
             else:
                 message = 'Unexpected tunable {} for governor {} on {}.\n'.format(tunable, governor, cpu)
                 message += 'Available tunables are: {}'.format(valid_tunables)
-                raise TargetError(message)
+                raise TargetStableError(message)
 
     @memoized
     def list_frequencies(self, cpu):
-        """Returns a list of frequencies supported by the cpu or an empty list
+        """Returns a sorted list of frequencies supported by the cpu or an empty list
         if not could be found."""
         if isinstance(cpu, int):
             cpu = 'cpu{}'.format(cpu)
@@ -177,21 +220,21 @@ class CpufreqModule(Module):
             cmd = 'cat /sys/devices/system/cpu/{}/cpufreq/scaling_available_frequencies'.format(cpu)
             output = self.target.execute(cmd)
             available_frequencies = list(map(int, output.strip().split()))  # pylint: disable=E1103
-        except TargetError:
+        except TargetStableError:
             # On some devices scaling_frequencies  is not generated.
             # http://adrynalyne-teachtofish.blogspot.co.uk/2011/11/how-to-enable-scalingavailablefrequenci.html
             # Fall back to parsing stats/time_in_state
             path = '/sys/devices/system/cpu/{}/cpufreq/stats/time_in_state'.format(cpu)
             try:
                 out_iter = iter(self.target.read_value(path).split())
-            except TargetError:
+            except TargetStableError:
                 if not self.target.file_exists(path):
                     # Probably intel_pstate. Can't get available freqs.
                     return []
                 raise
 
             available_frequencies = list(map(int, reversed([f for f, _ in zip(out_iter, out_iter)])))
-        return available_frequencies
+        return sorted(available_frequencies)
 
     @memoized
     def get_max_available_frequency(self, cpu):
@@ -200,7 +243,7 @@ class CpufreqModule(Module):
         could not be found.
         """
         freqs = self.list_frequencies(cpu)
-        return freqs and max(freqs) or None
+        return max(freqs) if freqs else None
 
     @memoized
     def get_min_available_frequency(self, cpu):
@@ -209,7 +252,7 @@ class CpufreqModule(Module):
         could not be found.
         """
         freqs = self.list_frequencies(cpu)
-        return freqs and min(freqs) or None
+        return min(freqs) if freqs else None
 
     def get_min_frequency(self, cpu):
         """
@@ -219,7 +262,7 @@ class CpufreqModule(Module):
         try to read the minimum frequency and the following exception will be
         raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
 
         """
         if isinstance(cpu, int):
@@ -239,7 +282,7 @@ class CpufreqModule(Module):
 
         on the device.
 
-        :raises: TargetError if the frequency is not supported by the CPU, or if, for
+        :raises: TargetStableError if the frequency is not supported by the CPU, or if, for
                  some reason, frequency could not be set.
         :raises: ValueError if ``frequency`` is not an integer.
 
@@ -250,7 +293,7 @@ class CpufreqModule(Module):
         try:
             value = int(frequency)
             if exact and available_frequencies and value not in available_frequencies:
-                raise TargetError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
+                raise TargetStableError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
                                                                                         value,
                                                                                         available_frequencies))
             sysfile = '/sys/devices/system/cpu/{}/cpufreq/scaling_min_freq'.format(cpu)
@@ -258,7 +301,7 @@ class CpufreqModule(Module):
         except ValueError:
             raise ValueError('Frequency must be an integer; got: "{}"'.format(frequency))
 
-    def get_frequency(self, cpu):
+    def get_frequency(self, cpu, cpuinfo=False):
         """
         Returns the current frequency currently set for the specified CPU.
 
@@ -266,12 +309,18 @@ class CpufreqModule(Module):
         try to read the current frequency and the following exception will be
         raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :param cpuinfo: Read the value in the cpuinfo interface that reflects
+                        the actual running frequency.
+
+        :raises: TargetStableError if for some reason the frequency could not be read.
 
         """
         if isinstance(cpu, int):
             cpu = 'cpu{}'.format(cpu)
-        sysfile = '/sys/devices/system/cpu/{}/cpufreq/scaling_cur_freq'.format(cpu)
+
+        sysfile = '/sys/devices/system/cpu/{}/cpufreq/{}'.format(
+                cpu,
+                'cpuinfo_cur_freq' if cpuinfo else 'scaling_cur_freq')
         return self.target.read_int(sysfile)
 
     def set_frequency(self, cpu, frequency, exact=True):
@@ -288,7 +337,7 @@ class CpufreqModule(Module):
 
         on the device (if it exists).
 
-        :raises: TargetError if the frequency is not supported by the CPU, or if, for
+        :raises: TargetStableError if the frequency is not supported by the CPU, or if, for
                  some reason, frequency could not be set.
         :raises: ValueError if ``frequency`` is not an integer.
 
@@ -300,13 +349,17 @@ class CpufreqModule(Module):
             if exact:
                 available_frequencies = self.list_frequencies(cpu)
                 if available_frequencies and value not in available_frequencies:
-                    raise TargetError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
+                    raise TargetStableError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
                                                                                             value,
                                                                                             available_frequencies))
             if self.get_governor(cpu) != 'userspace':
-                raise TargetError('Can\'t set {} frequency; governor must be "userspace"'.format(cpu))
+                raise TargetStableError('Can\'t set {} frequency; governor must be "userspace"'.format(cpu))
             sysfile = '/sys/devices/system/cpu/{}/cpufreq/scaling_setspeed'.format(cpu)
             self.target.write_value(sysfile, value, verify=False)
+            cpuinfo = self.get_frequency(cpu, cpuinfo=True)
+            if cpuinfo != value:
+                self.logger.warning(
+                    'The cpufreq value has not been applied properly cpuinfo={} request={}'.format(cpuinfo, value))
         except ValueError:
             raise ValueError('Frequency must be an integer; got: "{}"'.format(frequency))
 
@@ -318,7 +371,7 @@ class CpufreqModule(Module):
         try to read the maximum frequency and the following exception will be
         raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
         """
         if isinstance(cpu, int):
             cpu = 'cpu{}'.format(cpu)
@@ -337,7 +390,7 @@ class CpufreqModule(Module):
 
         on the device.
 
-        :raises: TargetError if the frequency is not supported by the CPU, or if, for
+        :raises: TargetStableError if the frequency is not supported by the CPU, or if, for
                  some reason, frequency could not be set.
         :raises: ValueError if ``frequency`` is not an integer.
 
@@ -348,7 +401,7 @@ class CpufreqModule(Module):
         try:
             value = int(frequency)
             if exact and available_frequencies and value not in available_frequencies:
-                raise TargetError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
+                raise TargetStableError('Can\'t set {} frequency to {}\nmust be in {}'.format(cpu,
                                                                                         value,
                                                                                         available_frequencies))
             sysfile = '/sys/devices/system/cpu/{}/cpufreq/scaling_max_freq'.format(cpu)
@@ -380,6 +433,7 @@ class CpufreqModule(Module):
         """
         Set the specified (minimum) frequency for all the (online) CPUs
         """
+        # pylint: disable=protected-access
         return self.target._execute_util(
                 'cpufreq_set_all_frequencies {}'.format(freq),
                 as_root=True)
@@ -388,6 +442,7 @@ class CpufreqModule(Module):
         """
         Get the current frequency for all the (online) CPUs
         """
+        # pylint: disable=protected-access
         output = self.target._execute_util(
                 'cpufreq_get_all_frequencies', as_root=True)
         frequencies = {}
@@ -403,16 +458,17 @@ class CpufreqModule(Module):
         Set the specified governor for all the (online) CPUs
         """
         try:
+            # pylint: disable=protected-access
             return self.target._execute_util(
                 'cpufreq_set_all_governors {}'.format(governor),
                 as_root=True)
-        except TargetError as e:
+        except TargetStableError as e:
             if ("echo: I/O error" in str(e) or
                 "write error: Invalid argument" in str(e)):
 
                 cpus_unsupported = [c for c in self.target.list_online_cpus()
                                     if governor not in self.list_governors(c)]
-                raise TargetError("Governor {} unsupported for CPUs {}".format(
+                raise TargetStableError("Governor {} unsupported for CPUs {}".format(
                     governor, cpus_unsupported))
             else:
                 raise
@@ -421,6 +477,7 @@ class CpufreqModule(Module):
         """
         Get the current governor for all the (online) CPUs
         """
+        # pylint: disable=protected-access
         output = self.target._execute_util(
                 'cpufreq_get_all_governors', as_root=True)
         governors = {}
@@ -435,6 +492,7 @@ class CpufreqModule(Module):
         """
         Report current frequencies on trace file
         """
+        # pylint: disable=protected-access
         return self.target._execute_util('cpufreq_trace_all_frequencies', as_root=True)
 
     def get_affected_cpus(self, cpu):
@@ -478,7 +536,7 @@ class CpufreqModule(Module):
         """
         cpus = set(range(self.target.number_of_cpus))
         while cpus:
-            cpu = next(iter(cpus))
+            cpu = next(iter(cpus))  # pylint: disable=stop-iteration-return
             domain = self.target.cpufreq.get_related_cpus(cpu)
             yield domain
             cpus = cpus.difference(domain)

devlib/module/cpuidle.py

@@ -15,8 +15,10 @@
 # pylint: disable=attribute-defined-outside-init
 from past.builtins import basestring
 
+from operator import attrgetter
+from pprint import pformat
+
 from devlib.module import Module
-from devlib.utils.misc import memoized
 from devlib.utils.types import integer, boolean
 
 
@@ -51,6 +53,7 @@ class CpuidleState(object):
         self.desc = desc
         self.power = power
         self.latency = latency
+        self.residency = residency
         self.id = self.target.path.basename(self.path)
         self.cpu = self.target.path.basename(self.target.path.dirname(path))
 
@@ -96,40 +99,35 @@ class Cpuidle(Module):
 
     def __init__(self, target):
         super(Cpuidle, self).__init__(target)
-        self._states = {}
 
         basepath = '/sys/devices/system/cpu/'
         values_tree = self.target.read_tree_values(basepath, depth=4, check_exit_code=False)
-        i = 0
-        cpu_id = 'cpu{}'.format(i)
-        while cpu_id in values_tree:
-            cpu_node = values_tree[cpu_id]
 
-            if 'cpuidle' in cpu_node:
-                idle_node = cpu_node['cpuidle']
-                self._states[cpu_id] = []
-                j = 0
-                state_id = 'state{}'.format(j)
-                while state_id in idle_node:
-                    state_node = idle_node[state_id]
-                    state = CpuidleState(
+        self._states = {
+            cpu_name: sorted(
+                (
+                    CpuidleState(
                         self.target,
-                        index=j,
-                        path=self.target.path.join(basepath, cpu_id, 'cpuidle', state_id),
+                        # state_name is formatted as "state42"
+                        index=int(state_name[len('state'):]),
+                        path=self.target.path.join(basepath, cpu_name, 'cpuidle', state_name),
                         name=state_node['name'],
                         desc=state_node['desc'],
                         power=int(state_node['power']),
                         latency=int(state_node['latency']),
                         residency=int(state_node['residency']) if 'residency' in state_node else None,
                     )
-                    msg = 'Adding {} state {}: {} {}'
-                    self.logger.debug(msg.format(cpu_id, j, state.name, state.desc))
-                    self._states[cpu_id].append(state)
-                    j += 1
-                    state_id = 'state{}'.format(j)
+                    for state_name, state_node in cpu_node['cpuidle'].items()
+                    if state_name.startswith('state')
+                ),
+                key=attrgetter('index'),
+            )
 
-            i += 1
-            cpu_id = 'cpu{}'.format(i)
+            for cpu_name, cpu_node in values_tree.items()
+            if cpu_name.startswith('cpu') and 'cpuidle' in cpu_node
+        }
+
+        self.logger.debug('Adding cpuidle states:\n{}'.format(pformat(self._states)))
 
     def get_states(self, cpu=0):
         if isinstance(cpu, int):
@@ -166,10 +164,14 @@ class Cpuidle(Module):
         """
         Momentarily wake each CPU. Ensures cpu_idle events in trace file.
         """
-        output = self.target._execute_util('cpuidle_wake_all_cpus')
+        # pylint: disable=protected-access
+        self.target._execute_util('cpuidle_wake_all_cpus')
 
     def get_driver(self):
         return self.target.read_value(self.target.path.join(self.root_path, 'current_driver'))
 
     def get_governor(self):
-        return self.target.read_value(self.target.path.join(self.root_path, 'current_governor_ro'))
+        path = self.target.path.join(self.root_path, 'current_governor_ro')
+        if not self.target.file_exists(path):
+            path = self.target.path.join(self.root_path, 'current_governor')
+        return self.target.read_value(path)

devlib/module/devfreq.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 #
 from devlib.module import Module
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 from devlib.utils.misc import memoized
 
 class DevfreqModule(Module):
@@ -64,13 +64,13 @@ class DevfreqModule(Module):
         Additional keyword arguments can be used to specify governor tunables for
         governors that support them.
 
-        :raises: TargetError if governor is not supported by the device, or if,
+        :raises: TargetStableError if governor is not supported by the device, or if,
                  for some reason, the governor could not be set.
 
         """
         supported = self.list_governors(device)
         if governor not in supported:
-            raise TargetError('Governor {} not supported for device {}'.format(governor, device))
+            raise TargetStableError('Governor {} not supported for device {}'.format(governor, device))
         sysfile = '/sys/class/devfreq/{}/governor'.format(device)
         self.target.write_value(sysfile, governor)
 
@@ -94,7 +94,7 @@ class DevfreqModule(Module):
         will try to read the minimum frequency and the following exception will
         be raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
 
         """
         sysfile = '/sys/class/devfreq/{}/min_freq'.format(device)
@@ -112,7 +112,7 @@ class DevfreqModule(Module):
 
         on the device.
 
-        :raises: TargetError if the frequency is not supported by the device, or if, for
+        :raises: TargetStableError if the frequency is not supported by the device, or if, for
                  some reason, frequency could not be set.
         :raises: ValueError if ``frequency`` is not an integer.
 
@@ -121,7 +121,7 @@ class DevfreqModule(Module):
         try:
             value = int(frequency)
             if exact and available_frequencies and value not in available_frequencies:
-                raise TargetError('Can\'t set {} frequency to {}\nmust be in {}'.format(device,
+                raise TargetStableError('Can\'t set {} frequency to {}\nmust be in {}'.format(device,
                                                                                         value,
                                                                                         available_frequencies))
             sysfile = '/sys/class/devfreq/{}/min_freq'.format(device)
@@ -137,7 +137,7 @@ class DevfreqModule(Module):
         will try to read the current frequency and the following exception will
         be raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
 
         """
         sysfile = '/sys/class/devfreq/{}/cur_freq'.format(device)
@@ -151,7 +151,7 @@ class DevfreqModule(Module):
         try to read the maximum frequency and the following exception will be
         raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
         """
         sysfile = '/sys/class/devfreq/{}/max_freq'.format(device)
         return self.target.read_int(sysfile)
@@ -168,7 +168,7 @@ class DevfreqModule(Module):
 
         on the device.
 
-        :raises: TargetError if the frequency is not supported by the device, or
+        :raises: TargetStableError if the frequency is not supported by the device, or
                  if, for some reason, frequency could not be set.
         :raises: ValueError if ``frequency`` is not an integer.
 
@@ -180,7 +180,7 @@ class DevfreqModule(Module):
             raise ValueError('Frequency must be an integer; got: "{}"'.format(frequency))
 
         if exact and value not in available_frequencies:
-            raise TargetError('Can\'t set {} frequency to {}\nmust be in {}'.format(device,
+            raise TargetStableError('Can\'t set {} frequency to {}\nmust be in {}'.format(device,
                                                                                     value,
                                                                                     available_frequencies))
         sysfile = '/sys/class/devfreq/{}/max_freq'.format(device)
@@ -200,15 +200,15 @@ class DevfreqModule(Module):
         Set the specified governor for all the (available) devices
         """
         try:
-            return self.target._execute_util(
+            return self.target._execute_util(  # pylint: disable=protected-access
                 'devfreq_set_all_governors {}'.format(governor), as_root=True)
-        except TargetError as e:
+        except TargetStableError as e:
             if ("echo: I/O error" in str(e) or
                 "write error: Invalid argument" in str(e)):
 
                 devs_unsupported = [d for d in self.target.list_devices()
                                     if governor not in self.list_governors(d)]
-                raise TargetError("Governor {} unsupported for devices {}".format(
+                raise TargetStableError("Governor {} unsupported for devices {}".format(
                     governor, devs_unsupported))
             else:
                 raise
@@ -217,7 +217,7 @@ class DevfreqModule(Module):
         """
         Get the current governor for all the (online) CPUs
         """
-        output = self.target._execute_util(
+        output = self.target._execute_util(  # pylint: disable=protected-access
                 'devfreq_get_all_governors', as_root=True)
         governors = {}
         for x in output.splitlines():
@@ -241,7 +241,7 @@ class DevfreqModule(Module):
         """
         Set the specified (minimum) frequency for all the (available) devices
         """
-        return self.target._execute_util(
+        return self.target._execute_util(  # pylint: disable=protected-access
                 'devfreq_set_all_frequencies {}'.format(freq),
                 as_root=True)
 
@@ -249,7 +249,7 @@ class DevfreqModule(Module):
         """
         Get the current frequency for all the (available) devices
         """
-        output = self.target._execute_util(
+        output = self.target._execute_util(  # pylint: disable=protected-access
                 'devfreq_get_all_frequencies', as_root=True)
         frequencies = {}
         for x in output.splitlines():
@@ -258,4 +258,3 @@ class DevfreqModule(Module):
                 break
             frequencies[kv[0]] = kv[1]
         return frequencies
-

devlib/module/gem5stats.py

@@ -14,16 +14,13 @@
 
 import re
 import sys
-import logging
 import os.path
 from collections import defaultdict
 
-import devlib
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError, HostError
 from devlib.module import Module
-from devlib.platform import Platform
 from devlib.platform.gem5 import Gem5SimulationPlatform
-from devlib.utils.gem5 import iter_statistics_dump, GEM5STATS_ROI_NUMBER, GEM5STATS_DUMP_TAIL
+from devlib.utils.gem5 import iter_statistics_dump, GEM5STATS_ROI_NUMBER
 
 
 class Gem5ROI:
@@ -39,7 +36,7 @@ class Gem5ROI:
         self.target.execute('m5 roistart {}'.format(self.number))
         self.running = True
         return True
-    
+
     def stop(self):
         if not self.running:
             return False
@@ -49,7 +46,7 @@ class Gem5ROI:
 
 class Gem5StatsModule(Module):
     '''
-    Module controlling Region of Interest (ROIs) markers, satistics dump 
+    Module controlling Region of Interest (ROIs) markers, satistics dump
     frequency and parsing statistics log file when using gem5 platforms.
 
     ROIs are identified by user-defined labels and need to be booked prior to
@@ -90,13 +87,13 @@ class Gem5StatsModule(Module):
         if label not in self.rois:
             raise KeyError('Incorrect ROI label: {}'.format(label))
         if not self.rois[label].start():
-            raise TargetError('ROI {} was already running'.format(label))
-    
+            raise TargetStableError('ROI {} was already running'.format(label))
+
     def roi_end(self, label):
         if label not in self.rois:
             raise KeyError('Incorrect ROI label: {}'.format(label))
         if not self.rois[label].stop():
-            raise TargetError('ROI {} was not running'.format(label))
+            raise TargetStableError('ROI {} was not running'.format(label))
 
     def start_periodic_dump(self, delay_ns=0, period_ns=10000000):
         # Default period is 10ms because it's roughly what's needed to have
@@ -105,7 +102,7 @@ class Gem5StatsModule(Module):
             msg = 'Delay ({}) and period ({}) for periodic dumps must be positive'
             raise ValueError(msg.format(delay_ns, period_ns))
         self.target.execute('m5 dumpresetstats {} {}'.format(delay_ns, period_ns))
-    
+
     def match(self, keys, rois_labels, base_dump=0):
         '''
         Extract specific values from the statistics log file of gem5
@@ -116,49 +113,49 @@ class Gem5StatsModule(Module):
             keys.
         :type keys: list
 
-        :param rois_labels: list of ROIs labels. ``match()`` returns the 
+        :param rois_labels: list of ROIs labels. ``match()`` returns the
             values of the specified fields only during dumps spanned by at
             least one of these ROIs.
         :type rois_label: list
 
-        :param base_dump: dump number from which ``match()`` should operate. By 
-            specifying a non-zero dump number, one can virtually truncate 
+        :param base_dump: dump number from which ``match()`` should operate. By
+            specifying a non-zero dump number, one can virtually truncate
             the head of the stats file and ignore all dumps before a specific
-            instant. The value of ``base_dump`` will typically (but not 
+            instant. The value of ``base_dump`` will typically (but not
             necessarily) be the result of a previous call to ``next_dump_no``.
             Default value is 0.
         :type base_dump: int
 
         :returns: a dict indexed by key parameters containing a dict indexed by
         ROI labels containing an in-order list of records for the key under
-        consideration during the active intervals of the ROI. 
-        
+        consideration during the active intervals of the ROI.
+
         Example of return value:
          * Result of match(['sim_'],['roi_1']):
             {
-                'sim_inst': 
+                'sim_inst':
                 {
                     'roi_1': [265300176, 267975881]
                 }
-                'sim_ops': 
+                'sim_ops':
                 {
                     'roi_1': [324395787, 327699419]
                 }
-                'sim_seconds': 
+                'sim_seconds':
                 {
                     'roi_1': [0.199960, 0.199897]
                 }
-                'sim_freq': 
+                'sim_freq':
                 {
                     'roi_1': [1000000000000, 1000000000000]
                 }
-                'sim_ticks': 
+                'sim_ticks':
                 {
                     'roi_1': [199960234227, 199896897330]
                 }
             }
         '''
-        records = defaultdict(lambda : defaultdict(list))
+        records = defaultdict(lambda: defaultdict(list))
         for record, active_rois in self.match_iter(keys, rois_labels, base_dump):
             for key in record:
                 for roi_label in active_rois:
@@ -178,15 +175,15 @@ class Gem5StatsModule(Module):
 
         Example of return value:
          * Result of match_iter(['sim_'],['roi_1', 'roi_2']).next()
-            ( 
-                { 
+            (
+                {
                     'sim_inst': 265300176,
                     'sim_ops': 324395787,
-                    'sim_seconds': 0.199960, 
+                    'sim_seconds': 0.199960,
                     'sim_freq': 1000000000000,
                     'sim_ticks': 199960234227,
                 },
-                [ 'roi_1 ' ] 
+                [ 'roi_1 ' ]
             )
         '''
         for label in rois_labels:
@@ -195,11 +192,11 @@ class Gem5StatsModule(Module):
             if self.rois[label].running:
                 self.logger.warning('Trying to match records in statistics file'
                         ' while ROI {} is running'.format(label))
-        
+
         # Construct one large regex that concatenates all keys because
         # matching one large expression is more efficient than several smaller
         all_keys_re = re.compile('|'.join(keys))
-        
+
         def roi_active(roi_label, dump):
             roi = self.rois[roi_label]
             return (roi.field in dump) and (int(dump[roi.field]) == 1)
@@ -215,8 +212,8 @@ class Gem5StatsModule(Module):
     def next_dump_no(self):
         '''
         Returns the number of the next dump to be written to the stats file.
-        
-        For example, if next_dump_no is called while there are 5 (0 to 4) full 
+
+        For example, if next_dump_no is called while there are 5 (0 to 4) full
         dumps in the stats file, it will return 5. This will be usefull to know
         from which dump one should match() in the future to get only data from
         now on.
@@ -224,7 +221,7 @@ class Gem5StatsModule(Module):
         with open(self._stats_file_path, 'r') as stats_file:
             # _goto_dump reach EOF and returns the total number of dumps + 1
             return self._goto_dump(stats_file, sys.maxsize)
-    
+
     def _goto_dump(self, stats_file, target_dump):
         if target_dump < 0:
             raise HostError('Cannot go to dump {}'.format(target_dump))
@@ -238,12 +235,12 @@ class Gem5StatsModule(Module):
         curr_dump = max(prev_dumps)
         curr_pos = self._dump_pos_cache[curr_dump]
         stats_file.seek(curr_pos)
-        
+
         # And iterate until target_dump
         dump_iterator = iter_statistics_dump(stats_file)
         while curr_dump < target_dump:
             try:
-                dump = next(dump_iterator)
+                next(dump_iterator)
             except StopIteration:
                 break
             # End of passed dump is beginning og next one
@@ -251,4 +248,3 @@ class Gem5StatsModule(Module):
             curr_dump += 1
         self._dump_pos_cache[curr_dump] = curr_pos
         return curr_dump
-

devlib/module/gpufreq.py

@@ -28,9 +28,8 @@
 # limitations under the License.
 
 import re
-import json
 from devlib.module import Module
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 from devlib.utils.misc import memoized
 
 class GpufreqModule(Module):
@@ -57,7 +56,7 @@ class GpufreqModule(Module):
 
     def set_governor(self, governor):
         if governor not in self.governors:
-            raise TargetError('Governor {} not supported for gpu {}'.format(governor, cpu))
+            raise TargetStableError('Governor {} not supported for gpu'.format(governor))
         self.target.write_value("/sys/kernel/gpu/gpu_governor", governor)
 
     def get_frequencies(self):
@@ -74,7 +73,7 @@ class GpufreqModule(Module):
         try to read the current frequency and the following exception will be
         raised ::
 
-        :raises: TargetError if for some reason the frequency could not be read.
+        :raises: TargetStableError if for some reason the frequency could not be read.
 
         """
         return int(self.target.read_value("/sys/kernel/gpu/gpu_clock"))
@@ -85,6 +84,6 @@ class GpufreqModule(Module):
         Returns the model name reported by the GPU.
         """
         try:
-          return self.target.read_value("/sys/kernel/gpu/gpu_model")
-        except:
-          return "unknown"
+            return self.target.read_value("/sys/kernel/gpu/gpu_model")
+        except:  # pylint: disable=bare-except
+            return "unknown"

devlib/module/hotplug.py

@@ -14,6 +14,7 @@
 #
 
 from devlib.module import Module
+from devlib.exception import TargetTransientError
 
 
 class HotplugModule(Module):
@@ -35,9 +36,17 @@ class HotplugModule(Module):
             cpu = 'cpu{}'.format(cpu)
         return target.path.join(cls.base_path, cpu, 'online')
 
-    def online_all(self):
-        self.target._execute_util('hotplug_online_all',
+    def list_hotpluggable_cpus(self):
+        return [cpu for cpu in range(self.target.number_of_cpus)
+                if self.target.file_exists(self._cpu_path(self.target, cpu))]
+
+    def online_all(self, verify=True):
+        self.target._execute_util('hotplug_online_all',  # pylint: disable=protected-access
                                   as_root=self.target.is_rooted)
+        if verify:
+            offline = set(self.target.list_offline_cpus())
+            if offline:
+                raise TargetTransientError('The following CPUs failed to come back online: {}'.format(offline))
 
     def online(self, *args):
         for cpu in args:
@@ -54,3 +63,22 @@ class HotplugModule(Module):
         value = 1 if online else 0
         self.target.write_value(path, value)
 
+    def _get_path(self, path):
+        return self.target.path.join(self.base_path,
+            path)
+
+    def fail(self, cpu, state):
+        path = self._get_path('cpu{}/hotplug/fail'.format(cpu))
+        return self.target.write_value(path, state)
+
+    def get_state(self, cpu):
+        path = self._get_path('cpu{}/hotplug/state'.format(cpu))
+        return self.target.read_value(path)
+
+    def get_states(self):
+        path = self._get_path('hotplug/states')
+        states_string = self.target.read_value(path)
+        return dict(
+                map(str.strip, string.split(':', 1))
+                for string in states_string.strip().splitlines()
+        )

devlib/module/hwmon.py

@@ -12,11 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-import os
 import re
 from collections import defaultdict
 
-from devlib import TargetError
+from devlib import TargetStableError
 from devlib.module import Module
 from devlib.utils.types import integer
 
@@ -119,7 +118,7 @@ class HwmonModule(Module):
     def probe(target):
         try:
             target.list_directory(HWMON_ROOT, as_root=target.is_rooted)
-        except TargetError:
+        except TargetStableError:
             # Doesn't exist or no permissions
             return False
         return True
@@ -138,7 +137,7 @@ class HwmonModule(Module):
         self.scan()
 
     def scan(self):
-        values_tree = self.target.read_tree_values(self.root, depth=3)
+        values_tree = self.target.read_tree_values(self.root, depth=3, tar=True)
         for entry_id, fields in values_tree.items():
             path = self.target.path.join(self.root, entry_id)
             name = fields.pop('name', None)
@@ -147,4 +146,3 @@ class HwmonModule(Module):
             self.logger.debug('Adding device {}'.format(name))
             device = HwmonDevice(self.target, path, name, fields)
             self.devices.append(device)
-

devlib/module/sched.py

@@ -13,28 +13,15 @@
 # limitations under the License.
 #
 
-#    Copyright 2018 Arm Limited
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 import logging
 import re
 
-from devlib.module import Module
-from devlib.utils.misc import memoized
-
 from past.builtins import basestring
 
+from devlib.module import Module
+from devlib.utils.misc import memoized
+from devlib.utils.types import boolean
+from devlib.exception import TargetStableError
 
 class SchedProcFSNode(object):
     """
@@ -62,7 +49,13 @@ class SchedProcFSNode(object):
     MC
     """
 
-    _re_procfs_node = re.compile(r"(?P<name>.*)(?P<digits>\d+)$")
+    _re_procfs_node = re.compile(r"(?P<name>.*\D)(?P<digits>\d+)$")
+
+    PACKABLE_ENTRIES = [
+        "cpu",
+        "domain",
+        "group"
+    ]
 
     @staticmethod
     def _ends_with_digits(node):
@@ -83,18 +76,19 @@ class SchedProcFSNode(object):
         """
         :returns: The name of the procfs node
         """
-        return re.search(SchedProcFSNode._re_procfs_node, node).group("name")
+        match = re.search(SchedProcFSNode._re_procfs_node, node)
+        if match:
+            return match.group("name")
 
-    @staticmethod
-    def _packable(node, entries):
+        return node
+
+    @classmethod
+    def _packable(cls, node):
         """
         :returns: Whether it makes sense to pack a node into a common entry
         """
         return (SchedProcFSNode._ends_with_digits(node) and
-                any([SchedProcFSNode._ends_with_digits(x) and
-                     SchedProcFSNode._node_digits(x) != SchedProcFSNode._node_digits(node) and
-                     SchedProcFSNode._node_name(x) == SchedProcFSNode._node_name(node)
-                     for x in entries]))
+                SchedProcFSNode._node_name(node) in cls.PACKABLE_ENTRIES)
 
     @staticmethod
     def _build_directory(node_name, node_data):
@@ -104,7 +98,7 @@ class SchedProcFSNode(object):
             return SchedProcFSNode(node_data)
 
     @staticmethod
-    def _build_entry(node_name, node_data):
+    def _build_entry(node_data):
         value = node_data
 
         # Most nodes just contain numerical data, try to convert
@@ -120,7 +114,7 @@ class SchedProcFSNode(object):
         if isinstance(node_data, dict):
             return SchedProcFSNode._build_directory(node_name, node_data)
         else:
-            return SchedProcFSNode._build_entry(node_name, node_data)
+            return SchedProcFSNode._build_entry(node_data)
 
     def __getattr__(self, name):
         return self._dyn_attrs[name]
@@ -131,7 +125,7 @@ class SchedProcFSNode(object):
         # Find which entries can be packed into a common entry
         packables = {
             node : SchedProcFSNode._node_name(node) + "s"
-            for node in list(nodes.keys()) if SchedProcFSNode._packable(node, list(nodes.keys()))
+            for node in list(nodes.keys()) if SchedProcFSNode._packable(node)
         }
 
         self._dyn_attrs = {}
@@ -152,33 +146,41 @@ class SchedProcFSNode(object):
             self._dyn_attrs[key] = self._build_node(key, nodes[key])
 
 
-class SchedDomain(SchedProcFSNode):
+class _SchedDomainFlag:
     """
-    Represents a sched domain as seen through procfs
+    Backward-compatible emulation of the former :class:`enum.Enum` that will
+    work on recent kernels with dynamic sched domain flags name and no value
+    exposed.
     """
-    # Domain flags obtained from include/linux/sched/topology.h on v4.17
-    # https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux/+/v4.17/include/linux/sched/topology.h#20
-    SD_LOAD_BALANCE        = 0x0001  # Do load balancing on this domain.
-    SD_BALANCE_NEWIDLE     = 0x0002  # Balance when about to become idle
-    SD_BALANCE_EXEC        = 0x0004  # Balance on exec
-    SD_BALANCE_FORK        = 0x0008  # Balance on fork, clone
-    SD_BALANCE_WAKE        = 0x0010  # Balance on wakeup
-    SD_WAKE_AFFINE         = 0x0020  # Wake task to waking CPU
-    SD_ASYM_CPUCAPACITY    = 0x0040  # Groups have different max cpu capacities
-    SD_SHARE_CPUCAPACITY   = 0x0080  # Domain members share cpu capacity
-    SD_SHARE_POWERDOMAIN   = 0x0100  # Domain members share power domain
-    SD_SHARE_PKG_RESOURCES = 0x0200  # Domain members share cpu pkg resources
-    SD_SERIALIZE           = 0x0400  # Only a single load balancing instance
-    SD_ASYM_PACKING        = 0x0800  # Place busy groups earlier in the domain
-    SD_PREFER_SIBLING      = 0x1000  # Prefer to place tasks in a sibling domain
-    SD_OVERLAP             = 0x2000  # sched_domains of this level overlap
-    SD_NUMA                = 0x4000  # cross-node balancing
-    # Only defined in Android
-    # https://android.googlesource.com/kernel/common/+/android-4.14/include/linux/sched/topology.h#29
-    SD_SHARE_CAP_STATES    = 0x8000  # Domain members share capacity state
 
-    # Checked to be valid from v4.4
-    SD_FLAGS_REF_PARTS = (4, 4, 0)
+    _INSTANCES = {}
+    """
+    Dictionary storing the instances so that they can be compared with ``is``
+    operator.
+    """
+
+    def __new__(cls, name, value, doc=None):
+        self = super().__new__(cls)
+        self.name = name
+        self._value = value
+        self.__doc__ = doc
+        return cls._INSTANCES.setdefault(self, self)
+
+    def __eq__(self, other):
+        # We *have to* check for "value" as well, otherwise it will be
+        # impossible to keep in the same set 2 instances with differing values.
+        return self.name == other.name and self._value == other._value
+
+    def __hash__(self):
+        return hash((self.name, self._value))
+
+    @property
+    def value(self):
+        value = self._value
+        if value is None:
+            raise AttributeError('The kernel does not expose the sched domain flag values')
+        else:
+            return value
 
     @staticmethod
     def check_version(target, logger):
@@ -186,33 +188,162 @@ class SchedDomain(SchedProcFSNode):
         Check the target and see if its kernel version matches our view of the world
         """
         parts = target.kernel_version.parts
-        if parts < SchedDomain.SD_FLAGS_REF_PARTS:
+        # Checked to be valid from v4.4
+        # Not saved as a class attribute else it'll be converted to an enum
+        ref_parts = (4, 4, 0)
+        if parts < ref_parts:
             logger.warn(
                 "Sched domain flags are defined for kernels v{} and up, "
-                "but target is running v{}".format(SchedDomain.SD_FLAGS_REF_PARTS, parts)
+                "but target is running v{}".format(ref_parts, parts)
             )
 
-    def has_flags(self, flags):
-        """
-        :returns: Whether 'flags' are set on this sched domain
-        """
-        return self.flags & flags == flags
+    def __str__(self):
+        return self.name
 
+    def __repr__(self):
+        return '<SchedDomainFlag: {}>'.format(self.name)
+
+
+class _SchedDomainFlagMeta(type):
+    """
+    Metaclass of :class:`SchedDomainFlag`.
+
+    Provides some level of emulation of :class:`enum.Enum` behavior for
+    backward compatibility.
+    """
+    @property
+    def _flags(self):
+        return [
+            attr
+            for name, attr in self.__dict__.items()
+            if name.startswith('SD_')
+        ]
+
+    def __getitem__(self, i):
+        return self._flags[i]
+
+    def __len__(self):
+        return len(self._flags)
+
+    # These would be provided by collections.abc.Sequence, but using it on a
+    # metaclass seems to have issues around __init_subclass__
+    def __iter__(self):
+        return iter(self._flags)
+
+    def __reversed__(self):
+        return reversed(self._flags)
+
+    def __contains__(self, x):
+        return x in self._flags
+
+    @property
+    def __members__(self):
+        return {flag.name: flag for flag in self._flags}
+
+
+class SchedDomainFlag(_SchedDomainFlag, metaclass=_SchedDomainFlagMeta):
+    """
+    Represents a sched domain flag.
+
+    .. note:: ``SD_*`` class attributes are deprecated, new code should never
+        test a given flag against one of these attributes with ``is`` (.e.g ``x
+        is SchedDomainFlag.SD_LOAD_BALANCE``. This is because the
+        ``SD_LOAD_BALANCE`` flag exists in two flavors that are not equal: one
+        with a value (the class attribute) and one without (dynamically created
+        when parsing flags for new kernels). Old code ran on old kernels should
+        work fine though.
+    """
+    # pylint: disable=bad-whitespace
+    # Domain flags obtained from include/linux/sched/topology.h on v4.17
+    # https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux/+/v4.17/include/linux/sched/topology.h#20
+    SD_LOAD_BALANCE =        _SchedDomainFlag("SD_LOAD_BALANCE", 0x0001, "Do load balancing on this domain")
+    SD_BALANCE_NEWIDLE =     _SchedDomainFlag("SD_BALANCE_NEWIDLE", 0x0002, "Balance when about to become idle")
+    SD_BALANCE_EXEC =        _SchedDomainFlag("SD_BALANCE_EXEC", 0x0004, "Balance on exec")
+    SD_BALANCE_FORK =        _SchedDomainFlag("SD_BALANCE_FORK", 0x0008, "Balance on fork, clone")
+    SD_BALANCE_WAKE =        _SchedDomainFlag("SD_BALANCE_WAKE", 0x0010, "Balance on wakeup")
+    SD_WAKE_AFFINE =         _SchedDomainFlag("SD_WAKE_AFFINE", 0x0020, "Wake task to waking CPU")
+    SD_ASYM_CPUCAPACITY =    _SchedDomainFlag("SD_ASYM_CPUCAPACITY", 0x0040, "Groups have different max cpu capacities")
+    SD_SHARE_CPUCAPACITY =   _SchedDomainFlag("SD_SHARE_CPUCAPACITY", 0x0080, "Domain members share cpu capacity")
+    SD_SHARE_POWERDOMAIN =   _SchedDomainFlag("SD_SHARE_POWERDOMAIN", 0x0100, "Domain members share power domain")
+    SD_SHARE_PKG_RESOURCES = _SchedDomainFlag("SD_SHARE_PKG_RESOURCES", 0x0200, "Domain members share cpu pkg resources")
+    SD_SERIALIZE =           _SchedDomainFlag("SD_SERIALIZE", 0x0400, "Only a single load balancing instance")
+    SD_ASYM_PACKING =        _SchedDomainFlag("SD_ASYM_PACKING", 0x0800, "Place busy groups earlier in the domain")
+    SD_PREFER_SIBLING =      _SchedDomainFlag("SD_PREFER_SIBLING", 0x1000, "Prefer to place tasks in a sibling domain")
+    SD_OVERLAP =             _SchedDomainFlag("SD_OVERLAP", 0x2000, "Sched_domains of this level overlap")
+    SD_NUMA =                _SchedDomainFlag("SD_NUMA", 0x4000, "Cross-node balancing")
+    # Only defined in Android
+    # https://android.googlesource.com/kernel/common/+/android-4.14/include/linux/sched/topology.h#29
+    SD_SHARE_CAP_STATES =    _SchedDomainFlag("SD_SHARE_CAP_STATES", 0x8000, "(Android only) Domain members share capacity state")
+
+
+class SchedDomain(SchedProcFSNode):
+    """
+    Represents a sched domain as seen through procfs
+    """
+    def __init__(self, nodes):
+        super().__init__(nodes)
+
+        flags = self.flags
+        # Recent kernels now have a space-separated list of flags instead of a
+        # packed bitfield
+        if isinstance(flags, str):
+            flags = {
+                _SchedDomainFlag(name=name, value=None)
+                for name in flags.split()
+            }
+        else:
+            def has_flag(flags, flag):
+                return flags & flag.value == flag.value
+
+            flags = {
+                flag
+                for flag in SchedDomainFlag
+                if has_flag(flags, flag)
+            }
+
+        self.flags = flags
+
+def _select_path(target, paths, name):
+    for p in paths:
+        if target.file_exists(p):
+            return p
+
+    raise TargetStableError('No {} found. Tried: {}'.format(name, ', '.join(paths)))
 
 class SchedProcFSData(SchedProcFSNode):
     """
     Root class for creating & storing SchedProcFSNode instances
     """
     _read_depth = 6
-    sched_domain_root = '/proc/sys/kernel/sched_domain'
+
+    @classmethod
+    def get_data_root(cls, target):
+        # Location differs depending on kernel version
+        paths = ['/sys/kernel/debug/sched/domains/', '/proc/sys/kernel/sched_domain']
+        return _select_path(target, paths, "sched_domain debug directory")
 
     @staticmethod
     def available(target):
-        return target.directory_exists(SchedProcFSData.sched_domain_root)
+        try:
+            path = SchedProcFSData.get_data_root(target)
+        except TargetStableError:
+            return False
+
+        cpus = target.list_directory(path, as_root=target.is_rooted)
+        if not cpus:
+            return False
+
+        # Even if we have a CPU entry, it can be empty (e.g. hotplugged out)
+        # Make sure some data is there
+        for cpu in cpus:
+            if target.file_exists(target.path.join(path, cpu, "domain0", "flags")):
+                return True
+
+        return False
 
     def __init__(self, target, path=None):
-        if not path:
-            path = self.sched_domain_root
+        if path is None:
+            path = SchedProcFSData.get_data_root(target)
 
         procfs = target.read_tree_values(path, depth=self._read_depth)
         super(SchedProcFSData, self).__init__(procfs)
@@ -227,16 +358,142 @@ class SchedModule(Module):
     @staticmethod
     def probe(target):
         logger = logging.getLogger(SchedModule.name)
-        SchedDomain.check_version(target, logger)
+        SchedDomainFlag.check_version(target, logger)
 
-        return SchedProcFSData.available(target)
+        # It makes sense to load this module if at least one of those
+        # functionalities is enabled
+        schedproc = SchedProcFSData.available(target)
+        debug = SchedModule.target_has_debug(target)
+        dmips = any([target.file_exists(SchedModule.cpu_dmips_capacity_path(target, cpu))
+                     for cpu in target.list_online_cpus()])
+
+        logger.info("Scheduler sched_domain procfs entries %s",
+                    "found" if schedproc else "not found")
+        logger.info("Detected kernel compiled with SCHED_DEBUG=%s",
+                    "y" if debug else "n")
+        logger.info("CPU capacity sysfs entries %s",
+                    "found" if dmips else "not found")
+
+        return schedproc or debug or dmips
+
+    def __init__(self, target):
+        super().__init__(target)
+
+    @classmethod
+    def get_sched_features_path(cls, target):
+        # Location differs depending on kernel version
+        paths = ['/sys/kernel/debug/sched/features', '/sys/kernel/debug/sched_features']
+        return _select_path(target, paths, "sched_features file")
+
+    def get_kernel_attributes(self, matching=None, check_exit_code=True):
+        """
+        Get the value of scheduler attributes.
+
+        :param matching: an (optional) substring to filter the scheduler
+        attributes to be returned.
+
+        The scheduler exposes a list of tunable attributes under:
+            /proc/sys/kernel
+        all starting with the "sched_" prefix.
+
+        This method returns a dictionary of all the "sched_" attributes exposed
+        by the target kernel, within the prefix removed.
+        It's possible to restrict the list of attributes by specifying a
+        substring to be matched.
+
+        returns: a dictionary of scheduler tunables
+        """
+        command = 'sched_get_kernel_attributes {}'.format(
+            matching if matching else ''
+        )
+        output = self.target._execute_util(command, as_root=self.target.is_rooted,
+                                           check_exit_code=check_exit_code)
+        result = {}
+        for entry in output.strip().split('\n'):
+            if ':' not in entry:
+                continue
+            path, value = entry.strip().split(':', 1)
+            if value in ['0', '1']:
+                value = bool(int(value))
+            elif value.isdigit():
+                value = int(value)
+            result[path] = value
+        return result
+
+    def set_kernel_attribute(self, attr, value, verify=True):
+        """
+        Set the value of a scheduler attribute.
+
+        :param attr: the attribute to set, without the "sched_" prefix
+        :param value: the value to set
+        :param verify: true to check that the requested value has been set
+
+        :raise TargetError: if the attribute cannot be set
+        """
+        if isinstance(value, bool):
+            value = '1' if value else '0'
+        elif isinstance(value, int):
+            value = str(value)
+        path = '/proc/sys/kernel/sched_' + attr
+        self.target.write_value(path, value, verify)
+
+    @classmethod
+    def target_has_debug(cls, target):
+        if target.config.get('SCHED_DEBUG') != 'y':
+            return False
+
+        try:
+            cls.get_sched_features_path(target)
+            return True
+        except TargetStableError:
+            return False
+
+    def get_features(self):
+        """
+        Get the status of each sched feature
+
+        :returns: a dictionary of features and their "is enabled" status
+        """
+        feats = self.target.read_value(self.get_sched_features_path(self.target))
+        features = {}
+        for feat in feats.split():
+            value = True
+            if feat.startswith('NO'):
+                feat = feat.replace('NO_', '', 1)
+                value = False
+            features[feat] = value
+        return features
+
+    def set_feature(self, feature, enable, verify=True):
+        """
+        Set the status of a specified scheduler feature
+
+        :param feature: the feature name to set
+        :param enable: true to enable the feature, false otherwise
+
+        :raise ValueError: if the specified enable value is not bool
+        :raise RuntimeError: if the specified feature cannot be set
+        """
+        feature = feature.upper()
+        feat_value = feature
+        if not boolean(enable):
+            feat_value = 'NO_' + feat_value
+        self.target.write_value(self.get_sched_features_path(self.target),
+                                feat_value, verify=False)
+        if not verify:
+            return
+        msg = 'Failed to set {}, feature not supported?'.format(feat_value)
+        features = self.get_features()
+        feat_value = features.get(feature, not enable)
+        if feat_value != enable:
+            raise RuntimeError(msg)
 
     def get_cpu_sd_info(self, cpu):
         """
-        :returns: An object view of /proc/sys/kernel/sched_domain/cpu<cpu>/*
+        :returns: An object view of the sched_domain debug directory of 'cpu'
         """
         path = self.target.path.join(
-            SchedProcFSData.sched_domain_root,
+            SchedProcFSData.get_data_root(self.target),
             "cpu{}".format(cpu)
         )
 
@@ -244,7 +501,7 @@ class SchedModule(Module):
 
     def get_sd_info(self):
         """
-        :returns: An object view of /proc/sys/kernel/sched_domain/*
+        :returns: An object view of the entire sched_domain debug directory
         """
         return SchedProcFSData(self.target)
 
@@ -260,17 +517,26 @@ class SchedModule(Module):
         :returns: Whether energy model data is available for 'cpu'
         """
         if not sd:
-            sd = SchedProcFSData(self.target, cpu)
+            sd = self.get_cpu_sd_info(cpu)
 
         return sd.procfs["domain0"].get("group0", {}).get("energy", {}).get("cap_states") != None
 
+    @classmethod
+    def cpu_dmips_capacity_path(cls, target, cpu):
+        """
+        :returns: The target sysfs path where the dmips capacity data should be
+        """
+        return target.path.join(
+            cls.cpu_sysfs_root,
+            'cpu{}/cpu_capacity'.format(cpu))
+
     @memoized
     def has_dmips_capacity(self, cpu):
         """
         :returns: Whether dmips capacity data is available for 'cpu'
         """
         return self.target.file_exists(
-            self.target.path.join(self.cpu_sysfs_root, 'cpu{}/cpu_capacity'.format(cpu))
+            self.cpu_dmips_capacity_path(self.target, cpu)
         )
 
     @memoized
@@ -279,10 +545,13 @@ class SchedModule(Module):
         :returns: The maximum capacity value exposed by the EAS energy model
         """
         if not sd:
-            sd = SchedProcFSData(self.target, cpu)
+            sd = self.get_cpu_sd_info(cpu)
 
         cap_states = sd.domains[0].groups[0].energy.cap_states
-        return int(cap_states.split('\t')[-2])
+        cap_states_list = cap_states.split('\t')
+        num_cap_states = sd.domains[0].groups[0].energy.nr_cap_states
+        max_cap_index = -1 * int(len(cap_states_list) / num_cap_states)
+        return int(cap_states_list[max_cap_index])
 
     @memoized
     def get_dmips_capacity(self, cpu):
@@ -290,14 +559,9 @@ class SchedModule(Module):
         :returns: The capacity value generated from the capacity-dmips-mhz DT entry
         """
         return self.target.read_value(
-            self.target.path.join(
-                self.cpu_sysfs_root,
-                'cpu{}/cpu_capacity'.format(cpu)
-            ),
-            int
+            self.cpu_dmips_capacity_path(self.target, cpu), int
         )
 
-    @memoized
     def get_capacities(self, default=None):
         """
         :param default: Default capacity value to find if no data is
@@ -308,16 +572,30 @@ class SchedModule(Module):
         :raises RuntimeError: Raised when no capacity information is
         found and 'default' is None
         """
-        cpus = list(range(self.target.number_of_cpus))
+        cpus = self.target.list_online_cpus()
 
         capacities = {}
-        sd_info = self.get_sd_info()
 
         for cpu in cpus:
+            if self.has_dmips_capacity(cpu):
+                capacities[cpu] = self.get_dmips_capacity(cpu)
+
+        missing_cpus = set(cpus).difference(capacities.keys())
+        if not missing_cpus:
+            return capacities
+
+        if not SchedProcFSData.available(self.target):
+            if default != None:
+                capacities.update({cpu : default for cpu in missing_cpus})
+                return capacities
+            else:
+                raise RuntimeError(
+                    'No capacity data for cpus {}'.format(sorted(missing_cpus)))
+
+        sd_info = self.get_sd_info()
+        for cpu in missing_cpus:
             if self.has_em(cpu, sd_info.cpus[cpu]):
                 capacities[cpu] = self.get_em_capacity(cpu, sd_info.cpus[cpu])
-            elif self.has_dmips_capacity(cpu):
-                capacities[cpu] = self.get_dmips_capacity(cpu)
             else:
                 if default != None:
                     capacities[cpu] = default

devlib/module/thermal.py

@@ -48,7 +48,7 @@ class ThermalZone(object):
         self.path = target.path.join(root, self.name)
         self.trip_points = {}
 
-        for entry in self.target.list_directory(self.path):
+        for entry in self.target.list_directory(self.path, as_root=target.is_rooted):
             re_match = re.match('^trip_point_([0-9]+)_temp', entry)
             if re_match is not None:
                 self.add_trip_point(re_match.group(1))
@@ -88,6 +88,9 @@ class ThermalModule(Module):
 
         for entry in target.list_directory(self.thermal_root):
             re_match = re.match('^(thermal_zone|cooling_device)([0-9]+)', entry)
+            if not re_match:
+                self.logger.warning('unknown thermal entry: %s', entry)
+                continue
 
             if re_match.group(1) == 'thermal_zone':
                 self.add_thermal_zone(re_match.group(2))

devlib/module/vexpress.py

@@ -20,7 +20,7 @@ import shutil
 from subprocess import CalledProcessError
 
 from devlib.module import HardRestModule, BootModule, FlashModule
-from devlib.exception import TargetError, HostError
+from devlib.exception import TargetError, TargetStableError, HostError
 from devlib.utils.serial_port import open_serial_connection, pulse_dtr, write_characters
 from devlib.utils.uefi import UefiMenu, UefiConfig
 from devlib.utils.uboot import UbootMenu
@@ -89,7 +89,7 @@ class VexpressReboottxtHardReset(HardRestModule):
         try:
             if self.target.is_connected:
                 self.target.execute('sync')
-        except TargetError:
+        except (TargetError, CalledProcessError):
             pass
 
         if not os.path.exists(self.path):
@@ -130,7 +130,7 @@ class VexpressBootModule(BootModule):
                                     init_dtr=0) as tty:
             self.get_through_early_boot(tty)
             self.perform_boot_sequence(tty)
-            self.wait_for_android_prompt(tty)
+            self.wait_for_shell_prompt(tty)
 
     def perform_boot_sequence(self, tty):
         raise NotImplementedError()
@@ -159,8 +159,8 @@ class VexpressBootModule(BootModule):
         menu.wait(timeout=self.timeout)
         return menu
 
-    def wait_for_android_prompt(self, tty):
-        self.logger.debug('Waiting for the Android prompt.')
+    def wait_for_shell_prompt(self, tty):
+        self.logger.debug('Waiting for the shell prompt.')
         tty.expect(self.target.shell_prompt, timeout=self.timeout)
         # This delay is needed to allow the platform some time to finish
         # initilizing; querying the ip address too early from connect() may
@@ -209,6 +209,7 @@ class VexpressUefiShellBoot(VexpressBootModule):
 
     name = 'vexpress-uefi-shell'
 
+    # pylint: disable=keyword-arg-before-vararg
     def __init__(self, target, uefi_entry='^Shell$',
                  efi_shell_prompt='Shell>',
                  image='kernel', bootargs=None,
@@ -224,7 +225,7 @@ class VexpressUefiShellBoot(VexpressBootModule):
         try:
             menu.select(self.uefi_entry)
         except LookupError:
-            raise TargetError('Did not see "{}" UEFI entry.'.format(self.uefi_entry))
+            raise TargetStableError('Did not see "{}" UEFI entry.'.format(self.uefi_entry))
         tty.expect(self.efi_shell_prompt, timeout=self.timeout)
         if self.bootargs:
             tty.sendline('')  # stop default boot
@@ -239,6 +240,7 @@ class VexpressUBoot(VexpressBootModule):
 
     name = 'vexpress-u-boot'
 
+    # pylint: disable=keyword-arg-before-vararg
     def __init__(self, target, env=None,
                  *args, **kwargs):
         super(VexpressUBoot, self).__init__(target, *args, **kwargs)
@@ -260,6 +262,7 @@ class VexpressBootmon(VexpressBootModule):
 
     name = 'vexpress-bootmon'
 
+    # pylint: disable=keyword-arg-before-vararg
     def __init__(self, target,
                  image, fdt, initrd, bootargs,
                  uses_bootscript=False,
@@ -282,11 +285,11 @@ class VexpressBootmon(VexpressBootModule):
         with open_serial_connection(port=self.port,
                                     baudrate=self.baudrate,
                                     timeout=self.timeout,
-                                    init_dtr=0) as tty:
-            write_characters(tty, 'fl linux fdt {}'.format(self.fdt))
-            write_characters(tty, 'fl linux initrd {}'.format(self.initrd))
-            write_characters(tty, 'fl linux boot {} {}'.format(self.image,
-                                                               self.bootargs))
+                                    init_dtr=0) as tty_conn:
+            write_characters(tty_conn, 'fl linux fdt {}'.format(self.fdt))
+            write_characters(tty_conn, 'fl linux initrd {}'.format(self.initrd))
+            write_characters(tty_conn, 'fl linux boot {} {}'.format(self.image,
+                                                                    self.bootargs))
 
 
 class VersatileExpressFlashModule(FlashModule):
@@ -322,15 +325,16 @@ class VersatileExpressFlashModule(FlashModule):
         self.timeout = timeout
         self.short_delay = short_delay
 
-    def __call__(self, image_bundle=None, images=None, bootargs=None):
+    def __call__(self, image_bundle=None, images=None, bootargs=None, connect=True):
         self.target.hard_reset()
         with open_serial_connection(port=self.target.platform.serial_port,
                                     baudrate=self.target.platform.baudrate,
                                     timeout=self.timeout,
                                     init_dtr=0) as tty:
+            # pylint: disable=no-member
             i = tty.expect([self.mcc_prompt, AUTOSTART_MESSAGE, OLD_AUTOSTART_MESSAGE])
             if i:
-                tty.sendline('')
+                tty.sendline('')  # pylint: disable=no-member
             wait_for_vemsd(self.vemsd_mount, tty, self.mcc_prompt, self.short_delay)
         try:
             if image_bundle:
@@ -340,9 +344,10 @@ class VersatileExpressFlashModule(FlashModule):
             os.system('sync')
         except (IOError, OSError) as e:
             msg = 'Could not deploy images to {}; got: {}'
-            raise TargetError(msg.format(self.vemsd_mount, e))
+            raise TargetStableError(msg.format(self.vemsd_mount, e))
         self.target.boot()
-        self.target.connect(timeout=30)
+        if connect:
+            self.target.connect(timeout=30)
 
     def _deploy_image_bundle(self, bundle):
         self.logger.debug('Validating {}'.format(bundle))
@@ -386,5 +391,4 @@ def wait_for_vemsd(vemsd_mount, tty, mcc_prompt=DEFAULT_MCC_PROMPT, short_delay=
         time.sleep(short_delay * 3)
         if os.path.exists(path):
             return
-    raise TargetError('Could not mount {}'.format(vemsd_mount))
-
+    raise TargetStableError('Could not mount {}'.format(vemsd_mount))

devlib/platform/__init__.py

@@ -78,7 +78,16 @@ class Platform(object):
 
     def _set_model_from_target(self, target):
         if target.os == 'android':
-            self.model = target.getprop('ro.product.model')
+            try:
+                self.model = target.getprop(prop='ro.product.device')
+            except KeyError:
+                self.model = target.getprop('ro.product.model')
+        elif target.file_exists("/proc/device-tree/model"):
+            # There is currently no better way to do this cross platform.
+            # ARM does not have dmidecode
+            raw_model = target.execute("cat /proc/device-tree/model")
+            device_model_to_return = '_'.join(raw_model.split()[:2])
+            return device_model_to_return.rstrip(' \t\r\n\0')
         elif target.is_rooted:
             try:
                 self.model = target.execute('dmidecode -s system-version',

devlib/platform/arm.py

@@ -19,10 +19,11 @@ import tempfile
 import time
 import pexpect
 
-from devlib.platform import Platform
-from devlib.instrument import Instrument, InstrumentChannel, MeasurementsCsv, Measurement,  CONTINUOUS,  INSTANTANEOUS
-from devlib.exception import TargetError, HostError
+from devlib.exception import HostError, TargetTransientError
 from devlib.host import PACKAGE_BIN_DIRECTORY
+from devlib.instrument import (Instrument, InstrumentChannel, MeasurementsCsv,
+                               Measurement, CONTINUOUS, INSTANTANEOUS)
+from devlib.platform import Platform
 from devlib.utils.csvutil import csvreader, csvwriter
 from devlib.utils.serial_port import open_serial_connection
 
@@ -89,9 +90,6 @@ class VersatileExpressPlatform(Platform):
     def _init_android_target(self, target):
         if target.connection_settings.get('device') is None:
             addr = self._get_target_ip_address(target)
-            if sys.version_info[0] == 3:
-                # Convert bytes to string for Python3 compatibility
-                addr = addr.decode("utf-8")
             target.connection_settings['device'] = addr + ':5555'
 
     def _init_linux_target(self, target):
@@ -99,6 +97,7 @@ class VersatileExpressPlatform(Platform):
             addr = self._get_target_ip_address(target)
             target.connection_settings['host'] = addr
 
+    # pylint: disable=no-member
     def _get_target_ip_address(self, target):
         with open_serial_connection(port=self.serial_port,
                                     baudrate=self.baudrate,
@@ -106,7 +105,7 @@ class VersatileExpressPlatform(Platform):
                                     init_dtr=0) as tty:
             tty.sendline('su')  # this is, apprently, required to query network device
                                 # info by name on recent Juno builds...
-            self.logger.debug('Waiting for the Android shell prompt.')
+            self.logger.debug('Waiting for the shell prompt.')
             tty.expect(target.shell_prompt)
 
             self.logger.debug('Waiting for IP address...')
@@ -117,11 +116,11 @@ class VersatileExpressPlatform(Platform):
                     time.sleep(1)
                     try:
                         tty.expect(r'inet ([1-9]\d*.\d+.\d+.\d+)', timeout=10)
-                        return tty.match.group(1)
+                        return tty.match.group(1).decode('utf-8')
                     except pexpect.TIMEOUT:
                         pass  # We have our own timeout -- see below.
                     if (time.time() - wait_start_time) > self.ready_timeout:
-                        raise TargetError('Could not acquire IP address.')
+                        raise TargetTransientError('Could not acquire IP address.')
             finally:
                 tty.sendline('exit')  # exit shell created by "su" call at the start
 
@@ -250,7 +249,7 @@ class JunoEnergyInstrument(Instrument):
         self.command = '{} -o {}'.format(self.binary, self.on_target_file)
         self.command2 = '{}'.format(self.binary)
 
-    def setup(self):
+    def setup(self):  # pylint: disable=arguments-differ
         self.binary = self.target.install(os.path.join(PACKAGE_BIN_DIRECTORY,
                                                        self.target.abi, self.binname))
         self.command = '{} -o {}'.format(self.binary, self.on_target_file)
@@ -266,6 +265,7 @@ class JunoEnergyInstrument(Instrument):
     def stop(self):
         self.target.killall(self.binname, signal='TERM', as_root=True)
 
+    # pylint: disable=arguments-differ
     def get_data(self, output_file):
         temp_file = tempfile.mktemp()
         self.target.pull(self.on_target_file, temp_file)
@@ -296,10 +296,9 @@ class JunoEnergyInstrument(Instrument):
         result = []
         output = self.target.execute(self.command2).split()
         with csvreader(output) as reader:
-            headings=next(reader)
+            headings = next(reader)
             values = next(reader)
             for chan in self.active_channels:
                 value = values[headings.index(chan.name)]
                 result.append(Measurement(value, chan))
         return result
-

devlib/platform/gem5.py

@@ -15,12 +15,13 @@
 import os
 import re
 import subprocess
-import sys
 import shutil
 import time
 import types
+import shlex
+from pipes import quote
 
-from devlib.exception import TargetError
+from devlib.exception import TargetStableError
 from devlib.host import PACKAGE_BIN_DIRECTORY
 from devlib.platform import Platform
 from devlib.utils.ssh import AndroidGem5Connection, LinuxGem5Connection
@@ -55,7 +56,7 @@ class Gem5SimulationPlatform(Platform):
         self.stdout_file = None
         self.stderr_file = None
         self.stderr_filename = None
-        if self.gem5_port is None:
+        if self.gem5_port is None:  # pylint: disable=simplifiable-if-statement
             # Allows devlib to pick up already running simulations
             self.start_gem5_simulation = True
         else:
@@ -87,12 +88,12 @@ class Gem5SimulationPlatform(Platform):
         Check if the command to start gem5 makes sense
         """
         if self.gem5args_binary is None:
-            raise TargetError('Please specify a gem5 binary.')
+            raise TargetStableError('Please specify a gem5 binary.')
         if self.gem5args_args is None:
-            raise TargetError('Please specify the arguments passed on to gem5.')
+            raise TargetStableError('Please specify the arguments passed on to gem5.')
         self.gem5args_virtio = str(self.gem5args_virtio).format(self.gem5_interact_dir)
         if self.gem5args_virtio is None:
-            raise TargetError('Please specify arguments needed for virtIO.')
+            raise TargetStableError('Please specify arguments needed for virtIO.')
 
     def _start_interaction_gem5(self):
         """
@@ -111,7 +112,7 @@ class Gem5SimulationPlatform(Platform):
             if not os.path.exists(self.stats_directory):
                 os.mkdir(self.stats_directory)
             if os.path.exists(self.gem5_out_dir):
-                raise TargetError("The gem5 stats directory {} already "
+                raise TargetStableError("The gem5 stats directory {} already "
                                   "exists.".format(self.gem5_out_dir))
             else:
                 os.mkdir(self.gem5_out_dir)
@@ -130,11 +131,11 @@ class Gem5SimulationPlatform(Platform):
             self.logger.info("Starting the gem5 simulator")
 
             command_line = "{} --outdir={} {} {}".format(self.gem5args_binary,
-                                                         self.gem5_out_dir,
+                                                         quote(self.gem5_out_dir),
                                                          self.gem5args_args,
                                                          self.gem5args_virtio)
             self.logger.debug("gem5 command line: {}".format(command_line))
-            self.gem5 = subprocess.Popen(command_line.split(),
+            self.gem5 = subprocess.Popen(shlex.split(command_line),
                                          stdout=self.stdout_file,
                                          stderr=self.stderr_file)
 
@@ -154,7 +155,7 @@ class Gem5SimulationPlatform(Platform):
         e.g. pid, input directory etc
         """
         self.logger("This functionality is not yet implemented")
-        raise TargetError()
+        raise TargetStableError()
 
     def _intercept_telnet_port(self):
         """
@@ -162,13 +163,13 @@ class Gem5SimulationPlatform(Platform):
         """
 
         if self.gem5 is None:
-            raise TargetError('The platform has no gem5 simulation! '
+            raise TargetStableError('The platform has no gem5 simulation! '
                               'Something went wrong')
         while self.gem5_port is None:
             # Check that gem5 is running!
             if self.gem5.poll():
                 message = "The gem5 process has crashed with error code {}!\n\tPlease see {} for details."
-                raise TargetError(message.format(self.gem5.poll(), self.stderr_file.name))
+                raise TargetStableError(message.format(self.gem5.poll(), self.stderr_file.name))
 
             # Open the stderr file
             with open(self.stderr_filename, 'r') as f:
@@ -186,7 +187,7 @@ class Gem5SimulationPlatform(Platform):
                     # Check if the sockets are not disabled
                     m = re.search(r"Sockets disabled, not accepting terminal connections", line)
                     if m:
-                        raise TargetError("The sockets have been disabled!"
+                        raise TargetStableError("The sockets have been disabled!"
                                           "Pass --listener-mode=on to gem5")
                 else:
                     time.sleep(1)
@@ -234,6 +235,7 @@ class Gem5SimulationPlatform(Platform):
         # Call the general update_from_target implementation
         super(Gem5SimulationPlatform, self).update_from_target(target)
 
+
     def gem5_capture_screen(self, filepath):
         file_list = os.listdir(self.gem5_out_dir)
         screen_caps = []
@@ -243,6 +245,7 @@ class Gem5SimulationPlatform(Platform):
 
         if '{ts}' in filepath:
             cmd = '{} date -u -Iseconds'
+            # pylint: disable=no-member
             ts = self.target.execute(cmd.format(self.target.busybox)).strip()
             filepath = filepath.format(ts=ts)
 
@@ -258,6 +261,7 @@ class Gem5SimulationPlatform(Platform):
                 im.save(temp_image, "PNG")
                 shutil.copy(temp_image, filepath)
                 os.remove(temp_image)
+                # pylint: disable=undefined-variable
                 gem5_logger.info("capture_screen: using gem5 screencap")
                 successful_capture = True
 
@@ -266,12 +270,14 @@ class Gem5SimulationPlatform(Platform):
 
         return successful_capture
 
+    # pylint: disable=no-self-use
     def _deploy_m5(self, target):
         # m5 is not yet installed so install it
         host_executable = os.path.join(PACKAGE_BIN_DIRECTORY,
                                        target.abi, 'm5')
         return target.install(host_executable)
 
+    # pylint: disable=no-self-use
     def _resize_shell(self, target):
         """
         Resize the shell to avoid line wrapping issues.
@@ -282,18 +288,16 @@ class Gem5SimulationPlatform(Platform):
         target.execute('reset', check_exit_code=False)
 
 # Methods that will be monkey-patched onto the target
-def _overwritten_reset(self):
-    raise TargetError('Resetting is not allowed on gem5 platforms!')
+def _overwritten_reset(self):  # pylint: disable=unused-argument
+    raise TargetStableError('Resetting is not allowed on gem5 platforms!')
 
-def _overwritten_reboot(self):
-    raise TargetError('Rebooting is not allowed on gem5 platforms!')
+def _overwritten_reboot(self):  # pylint: disable=unused-argument
+    raise TargetStableError('Rebooting is not allowed on gem5 platforms!')
 
 def _overwritten_capture_screen(self, filepath):
     connection_screencapped = self.platform.gem5_capture_screen(filepath)
-    if connection_screencapped == False:
+    if not connection_screencapped:
         # The connection was not able to capture the screen so use the target
         # implementation
         self.logger.debug('{} was not able to screen cap, using the original target implementation'.format(self.platform.__class__.__name__))
         self.target_impl_capture_screen(filepath)
-
-

devlib/trace/__init__.py

@@ -1,35 +0,0 @@
-#    Copyright 2015 ARM Limited
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-import logging
-
-
-class TraceCollector(object):
-
-    def __init__(self, target):
-        self.target = target
-        self.logger = logging.getLogger(self.__class__.__name__)
-
-    def reset(self):
-        pass
-
-    def start(self):
-        pass
-
-    def stop(self):
-        pass
-
-    def get_trace(self, outfile):
-        pass

devlib/utils/__init__.py

@@ -12,5 +12,3 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-
-

devlib/utils/android.py

@@ -19,33 +19,43 @@ Utility functions for working with Android devices through adb.
 
 """
 # pylint: disable=E1103
+import glob
+import logging
 import os
 import pexpect
-import time
-import subprocess
-import logging
 import re
-import threading
-import tempfile
-import queue
+import subprocess
 import sys
-from collections import defaultdict
+import tempfile
+import time
+import uuid
+import zipfile
 
-from devlib.exception import TargetError, HostError, DevlibError
-from devlib.utils.misc import check_output, which, memoized, ABI_MAP
-from devlib.utils.misc import escape_single_quotes, escape_double_quotes
-from devlib import host
+from collections import defaultdict
+from io import StringIO
+from lxml import etree
+
+try:
+    from shlex import quote
+except ImportError:
+    from pipes import quote
+
+from devlib.exception import TargetTransientError, TargetStableError, HostError, TargetTransientCalledProcessError, TargetStableCalledProcessError
+from devlib.utils.misc import check_output, which, ABI_MAP, redirect_streams, get_subprocess
+from devlib.connection import ConnectionBase, AdbBackgroundCommand, PopenBackgroundCommand, PopenTransferManager
 
 
 logger = logging.getLogger('android')
 
 MAX_ATTEMPTS = 5
 AM_START_ERROR = re.compile(r"Error: Activity.*")
+AAPT_BADGING_OUTPUT = re.compile(r"no dump ((file)|(apk)) specified", re.IGNORECASE)
 
 # See:
 # http://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels
 ANDROID_VERSION_MAP = {
-    28: 'P',
+    29: 'Q',
+    28: 'PIE',
     27: 'OREO_MR1',
     26: 'OREO',
     25: 'NOUGAT_MR1',
@@ -87,6 +97,7 @@ android_home = None
 platform_tools = None
 adb = None
 aapt = None
+aapt_version = None
 fastboot = None
 
 
@@ -117,6 +128,7 @@ class AdbDevice(object):
         self.name = name
         self.status = status
 
+    # pylint: disable=undefined-variable
     def __cmp__(self, other):
         if isinstance(other, AdbDevice):
             return cmp(self.name, other.name)
@@ -134,6 +146,7 @@ class ApkInfo(object):
     version_regex = re.compile(r"name='(?P<name>[^']+)' versionCode='(?P<vcode>[^']+)' versionName='(?P<vname>[^']+)'")
     name_regex = re.compile(r"name='(?P<name>[^']+)'")
     permission_regex = re.compile(r"name='(?P<permission>[^']+)'")
+    activity_regex = re.compile(r'\s*A:\s*android:name\(0x\d+\)=".(?P<name>\w+)"')
 
     def __init__(self, path=None):
         self.path = path
@@ -144,19 +157,16 @@ class ApkInfo(object):
         self.version_code = None
         self.native_code = None
         self.permissions = []
-        self.parse(path)
+        self._apk_path = None
+        self._activities = None
+        self._methods = None
+        if path:
+            self.parse(path)
 
+    # pylint: disable=too-many-branches
     def parse(self, apk_path):
         _check_env()
-        command = [aapt, 'dump', 'badging', apk_path]
-        logger.debug(' '.join(command))
-        try:
-            output = subprocess.check_output(command, stderr=subprocess.STDOUT)
-            if sys.version_info[0] == 3:
-                output = output.decode(sys.stdout.encoding, 'replace')
-        except subprocess.CalledProcessError as e:
-            raise HostError('Error parsing APK file {}. `aapt` says:\n{}'
-                            .format(apk_path, e.output))
+        output = self._run([aapt, 'dump', 'badging', apk_path])
         for line in output.split('\n'):
             if line.startswith('application-label:'):
                 self.label = line.split(':')[1].strip().replace('\'', '')
@@ -189,19 +199,203 @@ class ApkInfo(object):
             else:
                 pass  # not interested
 
+        self._apk_path = apk_path
+        self._activities = None
+        self._methods = None
 
-class AdbConnection(object):
+    @property
+    def activities(self):
+        if self._activities is None:
+            cmd = [aapt, 'dump', 'xmltree', self._apk_path]
+            if aapt_version == 2:
+                cmd += ['--file']
+            cmd += ['AndroidManifest.xml']
+            matched_activities = self.activity_regex.finditer(self._run(cmd))
+            self._activities = [m.group('name') for m in matched_activities]
+        return self._activities
+
+    @property
+    def methods(self):
+        if self._methods is None:
+            # Only try to extract once
+            self._methods = []
+            with tempfile.TemporaryDirectory() as tmp_dir:
+                with zipfile.ZipFile(self._apk_path, 'r') as z:
+                    try:
+                        extracted = z.extract('classes.dex', tmp_dir)
+                    except KeyError:
+                        return []
+                dexdump = os.path.join(os.path.dirname(aapt), 'dexdump')
+                command = [dexdump, '-l', 'xml', extracted]
+                dump = self._run(command)
+
+            # Dexdump from build tools v30.0.X does not seem to produce
+            # valid xml from certain APKs so ignore errors and attempt to recover.
+            parser = etree.XMLParser(encoding='utf-8', recover=True)
+            xml_tree = etree.parse(StringIO(dump), parser)
+
+            package = next((i for i in xml_tree.iter('package')
+                           if i.attrib['name'] == self.package), None)
+
+            self._methods = [(meth.attrib['name'], klass.attrib['name'])
+                             for klass in package.iter('class')
+                             for meth in klass.iter('method')] if package else []
+        return self._methods
+
+    def _run(self, command):
+        logger.debug(' '.join(command))
+        try:
+            output = subprocess.check_output(command, stderr=subprocess.STDOUT)
+            if sys.version_info[0] == 3:
+                output = output.decode(sys.stdout.encoding or 'utf-8', 'replace')
+        except subprocess.CalledProcessError as e:
+            raise HostError('Error while running "{}":\n{}'
+                            .format(command, e.output))
+        return output
+
+
+class AdbConnection(ConnectionBase):
 
     # maintains the count of parallel active connections to a device, so that
     # adb disconnect is not invoked untill all connections are closed
     active_connections = defaultdict(int)
+    # Track connected as root status per device
+    _connected_as_root = defaultdict(lambda: None)
     default_timeout = 10
     ls_command = 'ls'
+    su_cmd = 'su -c {}'
 
     @property
     def name(self):
         return self.device
 
+    @property
+    def connected_as_root(self):
+        if self._connected_as_root[self.device] is None:
+            result = self.execute('id')
+            self._connected_as_root[self.device] = 'uid=0(' in result
+        return self._connected_as_root[self.device]
+
+    @connected_as_root.setter
+    def connected_as_root(self, state):
+        self._connected_as_root[self.device] = state
+
+    # pylint: disable=unused-argument
+    def __init__(self, device=None, timeout=None, platform=None, adb_server=None,
+                 adb_as_root=False, connection_attempts=MAX_ATTEMPTS,
+                 poll_transfers=False,
+                 start_transfer_poll_delay=30,
+                 total_transfer_timeout=3600,
+                 transfer_poll_period=30,):
+        super().__init__()
+        self.timeout = timeout if timeout is not None else self.default_timeout
+        if device is None:
+            device = adb_get_device(timeout=timeout, adb_server=adb_server)
+        self.device = device
+        self.adb_server = adb_server
+        self.adb_as_root = adb_as_root
+        self.poll_transfers = poll_transfers
+        if poll_transfers:
+            transfer_opts = {'start_transfer_poll_delay': start_transfer_poll_delay,
+                            'total_timeout': total_transfer_timeout,
+                            'poll_period': transfer_poll_period,
+                            }
+        self.transfer_mgr = PopenTransferManager(self, **transfer_opts) if poll_transfers else None
+        if self.adb_as_root:
+            self.adb_root(enable=True)
+        adb_connect(self.device, adb_server=self.adb_server, attempts=connection_attempts)
+        AdbConnection.active_connections[self.device] += 1
+        self._setup_ls()
+        self._setup_su()
+
+    def push(self, sources, dest, timeout=None):
+        return self._push_pull('push', sources, dest, timeout)
+
+    def pull(self, sources, dest, timeout=None):
+        return self._push_pull('pull', sources, dest, timeout)
+
+    def _push_pull(self, action, sources, dest, timeout):
+        sources = list(sources)
+        paths = sources + [dest]
+
+        # Quote twice to avoid expansion by host shell, then ADB globbing
+        do_quote = lambda x: quote(glob.escape(x))
+        paths = ' '.join(map(do_quote, paths))
+
+        command = "{} {}".format(action, paths)
+        if timeout or not self.poll_transfers:
+            adb_command(self.device, command, timeout=timeout, adb_server=self.adb_server)
+        else:
+            with self.transfer_mgr.manage(sources, dest, action):
+                bg_cmd = adb_command_background(self.device, command, adb_server=self.adb_server)
+                self.transfer_mgr.set_transfer_and_wait(bg_cmd)
+
+    # pylint: disable=unused-argument
+    def execute(self, command, timeout=None, check_exit_code=False,
+                as_root=False, strip_colors=True, will_succeed=False):
+        if as_root and self.connected_as_root:
+            as_root = False
+        try:
+            return adb_shell(self.device, command, timeout, check_exit_code,
+                             as_root, adb_server=self.adb_server, su_cmd=self.su_cmd)
+        except subprocess.CalledProcessError as e:
+            cls = TargetTransientCalledProcessError if will_succeed else TargetStableCalledProcessError
+            raise cls(
+                e.returncode,
+                command,
+                e.output,
+                e.stderr,
+            )
+        except TargetStableError as e:
+            if will_succeed:
+                raise TargetTransientError(e)
+            else:
+                raise
+
+    def background(self, command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, as_root=False):
+        if as_root and self.connected_as_root:
+            as_root = False
+        bg_cmd = self._background(command, stdout, stderr, as_root)
+        self._current_bg_cmds.add(bg_cmd)
+        return bg_cmd
+
+    def _background(self, command, stdout, stderr, as_root):
+        adb_shell, pid = adb_background_shell(self, command, stdout, stderr, as_root)
+        bg_cmd = AdbBackgroundCommand(
+            conn=self,
+            adb_popen=adb_shell,
+            pid=pid,
+            as_root=as_root
+        )
+        return bg_cmd
+
+    def _close(self):
+        AdbConnection.active_connections[self.device] -= 1
+        if AdbConnection.active_connections[self.device] <= 0:
+            if self.adb_as_root:
+                self.adb_root(enable=False)
+            adb_disconnect(self.device, self.adb_server)
+            del AdbConnection.active_connections[self.device]
+
+    def cancel_running_command(self):
+        # adbd multiplexes commands so that they don't interfer with each
+        # other, so there is no need to explicitly cancel a running command
+        # before the next one can be issued.
+        pass
+
+    def adb_root(self, enable=True):
+        cmd = 'root' if enable else 'unroot'
+        output = adb_command(self.device, cmd, timeout=30, adb_server=self.adb_server)
+        if 'cannot run as root in production builds' in output:
+            raise TargetStableError(output)
+        AdbConnection._connected_as_root[self.device] = enable
+
+    def wait_for_device(self, timeout=30):
+        adb_command(self.device, 'wait-for-device', timeout, self.adb_server)
+
+    def reboot_bootloader(self, timeout=30):
+        adb_command(self.device, 'reboot-bootloader', timeout, self.adb_server)
+
     # Again, we need to handle boards where the default output format from ls is
     # single column *and* boards where the default output is multi-column.
     # We need to do this purely because the '-1' option causes errors on older
@@ -222,63 +416,24 @@ class AdbConnection(object):
             self.ls_command = 'ls'
         logger.debug("ls command is set to {}".format(self.ls_command))
 
-    def __init__(self, device=None, timeout=None, platform=None, adb_server=None):
-        self.timeout = timeout if timeout is not None else self.default_timeout
-        if device is None:
-            device = adb_get_device(timeout=timeout, adb_server=adb_server)
-        self.device = device
-        self.adb_server = adb_server
-        adb_connect(self.device)
-        AdbConnection.active_connections[self.device] += 1
-        self._setup_ls()
-
-    def push(self, source, dest, timeout=None):
-        if timeout is None:
-            timeout = self.timeout
-        command = "push '{}' '{}'".format(source, dest)
-        if not os.path.exists(source):
-            raise HostError('No such file "{}"'.format(source))
-        return adb_command(self.device, command, timeout=timeout, adb_server=self.adb_server)
-
-    def pull(self, source, dest, timeout=None):
-        if timeout is None:
-            timeout = self.timeout
-        # Pull all files matching a wildcard expression
-        if os.path.isdir(dest) and \
-           ('*' in source or '?' in source):
-            command = 'shell {} {}'.format(self.ls_command, source)
-            output = adb_command(self.device, command, timeout=timeout, adb_server=self.adb_server)
-            for line in output.splitlines():
-                command = "pull '{}' '{}'".format(line.strip(), dest)
-                adb_command(self.device, command, timeout=timeout, adb_server=self.adb_server)
+    def _setup_su(self):
+        # Already root, nothing to do
+        if self.connected_as_root:
             return
-        command = "pull '{}' '{}'".format(source, dest)
-        return adb_command(self.device, command, timeout=timeout, adb_server=self.adb_server)
-
-    def execute(self, command, timeout=None, check_exit_code=False,
-                as_root=False, strip_colors=True):
-        return adb_shell(self.device, command, timeout, check_exit_code,
-                         as_root, adb_server=self.adb_server)
-
-    def background(self, command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, as_root=False):
-        return adb_background_shell(self.device, command, stdout, stderr, as_root)
-
-    def close(self):
-        AdbConnection.active_connections[self.device] -= 1
-        if AdbConnection.active_connections[self.device] <= 0:
-            adb_disconnect(self.device)
-            del AdbConnection.active_connections[self.device]
-
-    def cancel_running_command(self):
-        # adbd multiplexes commands so that they don't interfer with each
-        # other, so there is no need to explicitly cancel a running command
-        # before the next one can be issued.
-        pass
+        try:
+            # Try the new style of invoking `su`
+            self.execute('ls', timeout=self.timeout, as_root=True,
+                         check_exit_code=True)
+        # If failure assume either old style or unrooted. Here we will assume
+        # old style and root status will be verified later.
+        except (TargetStableError, TargetTransientError, TimeoutError):
+            self.su_cmd = 'echo {} | su'
+        logger.debug("su command is set to {}".format(quote(self.su_cmd)))
 
 
 def fastboot_command(command, timeout=None, device=None):
     _check_env()
-    target = '-s {}'.format(device) if device else ''
+    target = '-s {}'.format(quote(device)) if device else ''
     full_command = 'fastboot {} {}'.format(target, command)
     logger.debug(full_command)
     output, _ = check_output(full_command, timeout, shell=True)
@@ -286,7 +441,7 @@ def fastboot_command(command, timeout=None, device=None):
 
 
 def fastboot_flash_partition(partition, path_to_image):
-    command = 'flash {} {}'.format(partition, path_to_image)
+    command = 'flash {} {}'.format(quote(partition), quote(path_to_image))
     fastboot_command(command)
 
 
@@ -326,7 +481,7 @@ def adb_get_device(timeout=None, adb_server=None):
             time.sleep(1)
 
 
-def adb_connect(device, timeout=None, attempts=MAX_ATTEMPTS):
+def adb_connect(device, timeout=None, attempts=MAX_ATTEMPTS, adb_server=None):
     _check_env()
     tries = 0
     output = None
@@ -334,10 +489,17 @@ def adb_connect(device, timeout=None, attempts=MAX_ATTEMPTS):
         tries += 1
         if device:
             if "." in device: # Connect is required only for ADB-over-IP
-                command = 'adb connect {}'.format(device)
+                # ADB does not automatically remove a network device from it's
+                # devices list when the connection is broken by the remote, so the
+                # adb connection may have gone "stale", resulting in adb blocking
+                # indefinitely when making calls to the device. To avoid this,
+                # always disconnect first.
+                adb_disconnect(device, adb_server)
+                adb_cmd = get_adb_command(None, 'connect', adb_server)
+                command = '{} {}'.format(adb_cmd, quote(device))
                 logger.debug(command)
                 output, _ = check_output(command, shell=True, timeout=timeout)
-        if _ping(device):
+        if _ping(device, adb_server):
             break
         time.sleep(10)
     else:  # did not connect to the device
@@ -347,52 +509,56 @@ def adb_connect(device, timeout=None, attempts=MAX_ATTEMPTS):
         raise HostError(message)
 
 
-def adb_disconnect(device):
+def adb_disconnect(device, adb_server=None):
     _check_env()
     if not device:
         return
-    if ":" in device and device in adb_list_devices():
-        command = "adb disconnect " + device
+    if ":" in device and device in adb_list_devices(adb_server):
+        adb_cmd = get_adb_command(None, 'disconnect', adb_server)
+        command = "{} {}".format(adb_cmd, device)
         logger.debug(command)
         retval = subprocess.call(command, stdout=open(os.devnull, 'wb'), shell=True)
         if retval:
-            raise TargetError('"{}" returned {}'.format(command, retval))
+            raise TargetTransientError('"{}" returned {}'.format(command, retval))
 
 
-def _ping(device):
+def _ping(device, adb_server=None):
     _check_env()
-    device_string = ' -s {}'.format(device) if device else ''
-    command = "adb{} shell \"ls /data/local/tmp > /dev/null\"".format(device_string)
+    adb_cmd = get_adb_command(device, 'shell', adb_server)
+    command = "{} {}".format(adb_cmd, quote('ls /data/local/tmp > /dev/null'))
     logger.debug(command)
     result = subprocess.call(command, stderr=subprocess.PIPE, shell=True)
-    if not result:
+    if not result:  # pylint: disable=simplifiable-if-statement
         return True
     else:
         return False
 
 
+# pylint: disable=too-many-locals
 def adb_shell(device, command, timeout=None, check_exit_code=False,
-              as_root=False, adb_server=None):  # NOQA
+              as_root=False, adb_server=None, su_cmd='su -c {}'):  # NOQA
     _check_env()
-    if as_root:
-        command = 'echo \'{}\' | su'.format(escape_single_quotes(command))
-    device_part = []
-    if adb_server:
-        device_part = ['-H', adb_server]
-    device_part += ['-s', device] if device else []
 
     # On older combinations of ADB/Android versions, the adb host command always
     # exits with 0 if it was able to run the command on the target, even if the
     # command failed (https://code.google.com/p/android/issues/detail?id=3254).
     # Homogenise this behaviour by running the command then echoing the exit
-    # code.
-    adb_shell_command = '({}); echo \"\n$?\"'.format(command)
-    actual_command = ['adb'] + device_part + ['shell', adb_shell_command]
-    logger.debug('adb {} shell {}'.format(' '.join(device_part), command))
+    # code of the executed command itself.
+    command = r'({}); echo "\n$?"'.format(command)
+
+    parts = ['adb']
+    if adb_server is not None:
+        parts += ['-H', adb_server]
+    if device is not None:
+        parts += ['-s', device]
+    parts += ['shell',
+              command if not as_root else su_cmd.format(quote(command))]
+
+    logger.debug(' '.join(quote(part) for part in parts))
     try:
-        raw_output, _ = check_output(actual_command, timeout, shell=False, combined_output=True)
+        raw_output, error = check_output(parts, timeout, shell=False)
     except subprocess.CalledProcessError as e:
-        raise TargetError(str(e))
+        raise TargetStableError(str(e))
 
     if raw_output:
         try:
@@ -408,42 +574,72 @@ def adb_shell(device, command, timeout=None, check_exit_code=False,
         exit_code = exit_code.strip()
         re_search = AM_START_ERROR.findall(output)
         if exit_code.isdigit():
-            if int(exit_code):
-                message = ('Got exit code {}\nfrom target command: {}\n'
-                           'OUTPUT: {}')
-                raise TargetError(message.format(exit_code, command, output))
+            exit_code = int(exit_code)
+            if exit_code:
+                raise subprocess.CalledProcessError(
+                    exit_code,
+                    command,
+                    output,
+                    error,
+                )
+
             elif re_search:
                 message = 'Could not start activity; got the following:\n{}'
-                raise TargetError(message.format(re_search[0]))
+                raise TargetStableError(message.format(re_search[0]))
         else:  # not all digits
             if re_search:
                 message = 'Could not start activity; got the following:\n{}'
-                raise TargetError(message.format(re_search[0]))
+                raise TargetStableError(message.format(re_search[0]))
             else:
                 message = 'adb has returned early; did not get an exit code. '\
                           'Was kill-server invoked?\nOUTPUT:\n-----\n{}\n'\
-                          '-----'
-                raise TargetError(message.format(raw_output))
+                          '-----\nSTDERR:\n-----\n{}\n-----'
+                raise TargetTransientError(message.format(raw_output, error))
 
-    return output
+    return '\n'.join(x for x in (output, error) if x)
 
 
-def adb_background_shell(device, command,
+def adb_background_shell(conn, command,
                          stdout=subprocess.PIPE,
                          stderr=subprocess.PIPE,
                          as_root=False):
-    """Runs the sepcified command in a subprocess, returning the the Popen object."""
-    _check_env()
-    if as_root:
-        command = 'echo \'{}\' | su'.format(escape_single_quotes(command))
-    device_string = ' -s {}'.format(device) if device else ''
-    full_command = 'adb{} shell "{}"'.format(device_string, escape_double_quotes(command))
-    logger.debug(full_command)
-    return subprocess.Popen(full_command, stdout=stdout, stderr=stderr, shell=True)
+    """Runs the specified command in a subprocess, returning the the Popen object."""
+    device = conn.device
+    adb_server = conn.adb_server
 
+    _check_env()
+    stdout, stderr, command = redirect_streams(stdout, stderr, command)
+    if as_root:
+        command = 'echo {} | su'.format(quote(command))
+
+    # Attach a unique UUID to the command line so it can be looked for without
+    # any ambiguity with ps
+    uuid_ = uuid.uuid4().hex
+    uuid_var = 'BACKGROUND_COMMAND_UUID={}'.format(uuid_)
+    command = "{} sh -c {}".format(uuid_var, quote(command))
+
+    adb_cmd = get_adb_command(device, 'shell', adb_server)
+    full_command = '{} {}'.format(adb_cmd, quote(command))
+    logger.debug(full_command)
+    p = subprocess.Popen(full_command, stdout=stdout, stderr=stderr, stdin=subprocess.PIPE, shell=True)
+
+    # Out of band PID lookup, to avoid conflicting needs with stdout redirection
+    find_pid = '{} ps -A -o pid,args | grep {}'.format(conn.busybox, quote(uuid_var))
+    ps_out = conn.execute(find_pid)
+    pids = [
+        int(line.strip().split(' ', 1)[0])
+        for line in ps_out.splitlines()
+    ]
+    # The line we are looking for is the first one, since it was started before
+    # any look up command
+    pid = sorted(pids)[0]
+    return (p, pid)
+
+def adb_kill_server(timeout=30, adb_server=None):
+    adb_command(None, 'kill-server', timeout, adb_server)
 
 def adb_list_devices(adb_server=None):
-    output = adb_command(None, 'devices',adb_server=adb_server)
+    output = adb_command(None, 'devices', adb_server=adb_server)
     devices = []
     for line in output.splitlines():
         parts = [p.strip() for p in line.split()]
@@ -452,7 +648,7 @@ def adb_list_devices(adb_server=None):
     return devices
 
 
-def get_adb_command(device, command, timeout=None,adb_server=None):
+def get_adb_command(device, command, adb_server=None):
     _check_env()
     device_string = ""
     if adb_server != None:
@@ -460,12 +656,22 @@ def get_adb_command(device, command, timeout=None,adb_server=None):
     device_string += ' -s {}'.format(device) if device else ''
     return "adb{} {}".format(device_string, command)
 
-def adb_command(device, command, timeout=None,adb_server=None):
-    full_command = get_adb_command(device, command, timeout, adb_server)
+
+def adb_command(device, command, timeout=None, adb_server=None):
+    full_command = get_adb_command(device, command, adb_server)
     logger.debug(full_command)
     output, _ = check_output(full_command, timeout, shell=True)
     return output
 
+
+def adb_command_background(device, command, adb_server=None):
+    full_command = get_adb_command(device, command, adb_server)
+    logger.debug(full_command)
+    proc = get_subprocess(full_command, shell=True)
+    cmd = PopenBackgroundCommand(proc)
+    return cmd
+
+
 def grant_app_permissions(target, package):
     """
     Grant an app all the permissions it may ask for
@@ -473,7 +679,7 @@ def grant_app_permissions(target, package):
     dumpsys = target.execute('dumpsys package {}'.format(package))
 
     permissions = re.search(
-        'requested permissions:\s*(?P<permissions>(android.permission.+\s*)+)', dumpsys
+        r'requested permissions:\s*(?P<permissions>(android.permission.+\s*)+)', dumpsys
     )
     if permissions is None:
         return
@@ -482,7 +688,7 @@ def grant_app_permissions(target, package):
     for permission in permissions:
         try:
             target.execute('pm grant {} {}'.format(package, permission))
-        except TargetError:
+        except TargetStableError:
             logger.debug('Cannot grant {}'.format(permission))
 
 
@@ -493,8 +699,10 @@ class _AndroidEnvironment(object):
     def __init__(self):
         self.android_home = None
         self.platform_tools = None
+        self.build_tools = None
         self.adb = None
         self.aapt = None
+        self.aapt_version = None
         self.fastboot = None
 
 
@@ -520,28 +728,75 @@ def _initialize_without_android_home(env):
     _init_common(env)
     return env
 
-
 def _init_common(env):
+    _discover_build_tools(env)
+    _discover_aapt(env)
+
+def _discover_build_tools(env):
     logger.debug('ANDROID_HOME: {}'.format(env.android_home))
     build_tools_directory = os.path.join(env.android_home, 'build-tools')
-    if not os.path.isdir(build_tools_directory):
-        msg = '''ANDROID_HOME ({}) does not appear to have valid Android SDK install
-                 (cannot find build-tools)'''
-        raise HostError(msg.format(env.android_home))
-    versions = os.listdir(build_tools_directory)
-    for version in reversed(sorted(versions)):
-        aapt_path = os.path.join(build_tools_directory, version, 'aapt')
-        if os.path.isfile(aapt_path):
-            logger.debug('Using aapt for version {}'.format(version))
-            env.aapt = aapt_path
-            break
-    else:
-        raise HostError('aapt not found. Please make sure at least one Android '
-                        'platform is installed.')
+    if os.path.isdir(build_tools_directory):
+        env.build_tools = build_tools_directory
 
+def _check_supported_aapt2(binary):
+    # At time of writing the version argument of aapt2 is not helpful as
+    # the output is only a placeholder that does not distinguish between versions
+    # with and without support for badging. Unfortunately aapt has been
+    # deprecated and fails to parse some valid apks so we will try to favour
+    # aapt2 if possible else will fall back to aapt.
+    # Try to execute the badging command and check if we get an expected error
+    # message as opposed to an unknown command error to determine if we have a
+    # suitable version.
+    cmd = '{} dump badging'.format(binary)
+    result = subprocess.run(cmd.encode('utf-8'), shell=True, stderr=subprocess.PIPE)
+    supported = bool(AAPT_BADGING_OUTPUT.search(result.stderr.decode('utf-8')))
+    msg = 'Found a {} aapt2 binary at: {}'
+    logger.debug(msg.format('supported' if supported else 'unsupported', binary))
+    return supported
+
+def _discover_aapt(env):
+    if env.build_tools:
+        aapt_path = ''
+        aapt2_path = ''
+        versions = os.listdir(env.build_tools)
+        for version in reversed(sorted(versions)):
+            if not os.path.isfile(aapt2_path):
+                aapt2_path = os.path.join(env.build_tools, version, 'aapt2')
+            if not os.path.isfile(aapt_path):
+                aapt_path = os.path.join(env.build_tools, version, 'aapt')
+                aapt_version = 1
+            # Use latest available version for aapt/appt2 but ensure at least one is valid.
+            if os.path.isfile(aapt2_path) or os.path.isfile(aapt_path):
+                break
+
+        # Use aapt2 only if present and we have a suitable version
+        if aapt2_path and _check_supported_aapt2(aapt2_path):
+            aapt_path = aapt2_path
+            aapt_version = 2
+
+        # Use the aapt version discoverted from build tools.
+        if aapt_path:
+            logger.debug('Using {} for version {}'.format(aapt_path, version))
+            env.aapt = aapt_path
+            env.aapt_version = aapt_version
+            return
+
+    # Try detecting aapt2 and aapt from PATH
+    if not env.aapt:
+            aapt2_path = which('aapt2')
+            if _check_supported_aapt2(aapt2_path):
+                env.aapt = aapt2_path
+                env.aapt_version = 2
+            else:
+                env.aapt = which('aapt')
+                env.aapt_version = 1
+
+    if not env.aapt:
+        raise HostError('aapt/aapt2 not found. Please make sure it is avaliable in PATH'
+                        ' or at least one Android platform is installed')
 
 def _check_env():
-    global android_home, platform_tools, adb, aapt  # pylint: disable=W0603
+    global android_home, platform_tools, adb, aapt, aapt_version  # pylint: disable=W0603
     if not android_home:
         android_home = os.getenv('ANDROID_HOME')
         if android_home:
@@ -552,6 +807,7 @@ def _check_env():
         platform_tools = _env.platform_tools
         adb = _env.adb
         aapt = _env.aapt
+        aapt_version = _env.aapt_version
 
 class LogcatMonitor(object):
     """
@@ -570,11 +826,14 @@ class LogcatMonitor(object):
     def logfile(self):
         return self._logfile
 
-    def __init__(self, target, regexps=None):
+    def __init__(self, target, regexps=None, logcat_format=None):
         super(LogcatMonitor, self).__init__()
 
         self.target = target
         self._regexps = regexps
+        self._logcat_format = logcat_format
+        self._logcat = None
+        self._logfile = None
 
     def start(self, outfile=None):
         """
@@ -586,7 +845,7 @@ class LogcatMonitor(object):
         if outfile:
             self._logfile = open(outfile, 'w')
         else:
-            self._logfile = tempfile.NamedTemporaryFile()
+            self._logfile = tempfile.NamedTemporaryFile(mode='w')
 
         self.target.clear_logcat()
 
@@ -600,16 +859,20 @@ class LogcatMonitor(object):
             # Logcat on older version of android do not support the -e argument
             # so fall back to using grep.
             if self.target.get_sdk_version() > 23:
-                logcat_cmd = '{} -e "{}"'.format(logcat_cmd, regexp)
+                logcat_cmd = '{} -e {}'.format(logcat_cmd, quote(regexp))
             else:
-                logcat_cmd = '{} | grep "{}"'.format(logcat_cmd, regexp)
+                logcat_cmd = '{} | grep {}'.format(logcat_cmd, quote(regexp))
 
-        logcat_cmd = get_adb_command(self.target.conn.device, logcat_cmd)
+        if self._logcat_format:
+            logcat_cmd = "{} -v {}".format(logcat_cmd, quote(self._logcat_format))
+
+        logcat_cmd = get_adb_command(self.target.conn.device, logcat_cmd, self.target.adb_server)
 
         logger.debug('logcat command ="{}"'.format(logcat_cmd))
-        self._logcat = pexpect.spawn(logcat_cmd, logfile=self._logfile)
+        self._logcat = pexpect.spawn(logcat_cmd, logfile=self._logfile, encoding='utf-8')
 
     def stop(self):
+        self.flush_log()
         self._logcat.terminate()
         self._logfile.close()
 
@@ -617,6 +880,12 @@ class LogcatMonitor(object):
         """
         Return the list of lines found by the monitor
         """
+        self.flush_log()
+
+        with open(self._logfile.name) as fh:
+            return [line for line in fh]
+
+    def flush_log(self):
         # Unless we tell pexect to 'expect' something, it won't read from
         # logcat's buffer or write into our logfile. We'll need to force it to
         # read any pending logcat output.
@@ -647,11 +916,8 @@ class LogcatMonitor(object):
                 # printed anything since pexpect last read from its buffer.
                 break
 
-        with open(self._logfile.name) as fh:
-            return [line for line in fh]
-
     def clear_log(self):
-        with open(self._logfile.name, 'w') as fh:
+        with open(self._logfile.name, 'w') as _:
             pass
 
     def search(self, regexp):
@@ -679,7 +945,7 @@ class LogcatMonitor(object):
         res = [line for line in log if re.match(regexp, line)]
 
         # Found some matches, return them
-        if len(res) > 0:
+        if res:
             return res
 
         # Store the number of lines we've searched already, so we don't have to

devlib/utils/gem5.py

@@ -18,7 +18,7 @@ import logging
 from devlib.utils.types import numeric
 
 
-GEM5STATS_FIELD_REGEX = re.compile("^(?P<key>[^- ]\S*) +(?P<value>[^#]+).+$")
+GEM5STATS_FIELD_REGEX = re.compile(r"^(?P<key>[^- ]\S*) +(?P<value>[^#]+).+$")
 GEM5STATS_DUMP_HEAD = '---------- Begin Simulation Statistics ----------'
 GEM5STATS_DUMP_TAIL = '---------- End Simulation Statistics   ----------'
 GEM5STATS_ROI_NUMBER = 8
@@ -28,7 +28,7 @@ logger = logging.getLogger('gem5')
 
 def iter_statistics_dump(stats_file):
     '''
-    Yields statistics dumps as dicts. The parameter is assumed to be a stream 
+    Yields statistics dumps as dicts. The parameter is assumed to be a stream
     reading from the statistics log file.
     '''
     cur_dump = {}
@@ -40,14 +40,13 @@ def iter_statistics_dump(stats_file):
             yield cur_dump
             cur_dump = {}
         else:
-            res = GEM5STATS_FIELD_REGEX.match(line) 
+            res = GEM5STATS_FIELD_REGEX.match(line)
             if res:
                 k = res.group("key")
                 vtext = res.group("value")
                 try:
                     v = list(map(numeric, vtext.split()))
-                    cur_dump[k] = v[0] if len(v)==1 else set(v)
+                    cur_dump[k] = v[0] if len(v) == 1 else set(v)
                 except ValueError:
                     msg = 'Found non-numeric entry in gem5 stats ({}: {})'
                     logger.warning(msg.format(k, vtext))
-

devlib/utils/misc.py

@@ -19,27 +19,43 @@ Miscellaneous functions that don't fit anywhere else.
 
 """
 from __future__ import division
-import os
-import sys
-import re
-import string
-import threading
-import signal
-import subprocess
-import pkgutil
-import logging
-import random
-import ctypes
-import threading
-from operator import itemgetter
+from contextlib import contextmanager
+from functools import partial, reduce, wraps
 from itertools import groupby
-from functools import partial
+from operator import itemgetter
+from weakref import WeakKeyDictionary, WeakSet
 
+import ctypes
+import functools
+import logging
+import os
+import pkgutil
+import random
+import re
+import signal
+import string
+import subprocess
+import sys
+import threading
+import types
 import wrapt
+import warnings
+
+
+try:
+    from contextlib import ExitStack
+except AttributeError:
+    from contextlib2 import ExitStack
+
+try:
+    from shlex import quote
+except ImportError:
+    from pipes import quote
+
 from past.builtins import basestring
 
+# pylint: disable=redefined-builtin
 from devlib.exception import HostError, TimeoutError
-from functools import reduce
 
 
 # ABI --> architectures list
@@ -127,9 +143,6 @@ def get_cpu_name(implementer, part, variant):
 
 
 def preexec_function():
-    # Ignore the SIGINT signal by setting the handler to the standard
-    # signal handler SIG_IGN.
-    signal.signal(signal.SIGINT, signal.SIG_IGN)
     # Change process group in case we have to kill the subprocess and all of
     # its children later.
     # TODO: this is Unix-specific; would be good to find an OS-agnostic way
@@ -140,13 +153,25 @@ def preexec_function():
 check_output_logger = logging.getLogger('check_output')
 # Popen is not thread safe. If two threads attempt to call it at the same time,
 # one may lock up. See https://bugs.python.org/issue12739.
-check_output_lock = threading.Lock()
+check_output_lock = threading.RLock()
 
 
-def check_output(command, timeout=None, ignore=None, inputtext=None,
-                 combined_output=False, **kwargs):
-    """This is a version of subprocess.check_output that adds a timeout parameter to kill
-    the subprocess if it does not return within the specified time."""
+def get_subprocess(command, **kwargs):
+    if 'stdout' in kwargs:
+        raise ValueError('stdout argument not allowed, it will be overridden.')
+    with check_output_lock:
+        process = subprocess.Popen(command,
+                                   stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE,
+                                   stdin=subprocess.PIPE,
+                                   preexec_fn=preexec_function,
+                                   **kwargs)
+    return process
+
+
+def check_subprocess_output(process, timeout=None, ignore=None, inputtext=None):
+    output = None
+    error = None
     # pylint: disable=too-many-branches
     if ignore is None:
         ignore = []
@@ -155,49 +180,35 @@ def check_output(command, timeout=None, ignore=None, inputtext=None,
     elif not isinstance(ignore, list) and ignore != 'all':
         message = 'Invalid value for ignore parameter: "{}"; must be an int or a list'
         raise ValueError(message.format(ignore))
-    if 'stdout' in kwargs:
-        raise ValueError('stdout argument not allowed, it will be overridden.')
-
-    def callback(pid):
-        try:
-            check_output_logger.debug('{} timed out; sending SIGKILL'.format(pid))
-            os.killpg(pid, signal.SIGKILL)
-        except OSError:
-            pass  # process may have already terminated.
-
-    with check_output_lock:
-        stderr = subprocess.STDOUT if combined_output else subprocess.PIPE
-        process = subprocess.Popen(command,
-                                   stdout=subprocess.PIPE,
-                                   stderr=stderr,
-                                   stdin=subprocess.PIPE,
-                                   preexec_fn=preexec_function,
-                                   **kwargs)
-
-    if timeout:
-        timer = threading.Timer(timeout, callback, [process.pid, ])
-        timer.start()
 
     try:
-        output, error = process.communicate(inputtext)
-        if sys.version_info[0] == 3:
-            # Currently errors=replace is needed as 0x8c throws an error
-            output = output.decode(sys.stdout.encoding, "replace")
-            if error:
-                error =  error.decode(sys.stderr.encoding, "replace")
-    finally:
-        if timeout:
-            timer.cancel()
+        output, error = process.communicate(inputtext, timeout=timeout)
+    except subprocess.TimeoutExpired as e:
+        timeout_expired = e
+    else:
+        timeout_expired = None
+
+    # Currently errors=replace is needed as 0x8c throws an error
+    output = output.decode(sys.stdout.encoding or 'utf-8', "replace") if output else ''
+    error = error.decode(sys.stderr.encoding or 'utf-8', "replace") if error else ''
+
+    if timeout_expired:
+        raise TimeoutError(process.args, output='\n'.join([output, error]))
 
     retcode = process.poll()
-    if retcode:
-        if retcode == -9:  # killed, assume due to timeout callback
-            raise TimeoutError(command, output='\n'.join([output or '', error or '']))
-        elif ignore != 'all' and retcode not in ignore:
-            raise subprocess.CalledProcessError(retcode, command, output='\n'.join([output or '', error or '']))
+    if retcode and ignore != 'all' and retcode not in ignore:
+        raise subprocess.CalledProcessError(retcode, process.args, output, error)
+
     return output, error
 
 
+def check_output(command, timeout=None, ignore=None, inputtext=None, **kwargs):
+    """This is a version of subprocess.check_output that adds a timeout parameter to kill
+    the subprocess if it does not return within the specified time."""
+    process = get_subprocess(command, **kwargs)
+    return check_subprocess_output(process, timeout=timeout, ignore=ignore, inputtext=inputtext)
+
+
 def walk_modules(path):
     """
     Given package name, return a list of all modules (including submodules, etc)
@@ -235,6 +246,32 @@ def walk_modules(path):
             mods.append(submod)
     return mods
 
+def redirect_streams(stdout, stderr, command):
+    """
+    Update a command to redirect a given stream to /dev/null if it's
+    ``subprocess.DEVNULL``.
+
+    :return: A tuple (stdout, stderr, command) with stream set to ``subprocess.PIPE``
+        if the `stream` parameter was set to ``subprocess.DEVNULL``.
+    """
+    def redirect(stream, redirection):
+        if stream == subprocess.DEVNULL:
+            suffix = '{}/dev/null'.format(redirection)
+        elif stream == subprocess.STDOUT:
+            suffix = '{}&1'.format(redirection)
+            # Indicate that there is nothing to monitor for stderr anymore
+            # since it's merged into stdout
+            stream = subprocess.DEVNULL
+        else:
+            suffix = ''
+
+        return (stream, suffix)
+
+    stdout, suffix1 = redirect(stdout, '>')
+    stderr, suffix2 = redirect(stderr, '2>')
+
+    command = 'sh -c {} {} {}'.format(quote(command), suffix1, suffix2)
+    return (stdout, stderr, command)
 
 def ensure_directory_exists(dirpath):
     """A filter for directory paths to ensure they exist."""
@@ -415,25 +452,51 @@ def convert_new_lines(text):
     """ Convert new lines to a common format.  """
     return text.replace('\r\n', '\n').replace('\r', '\n')
 
+def sanitize_cmd_template(cmd):
+    msg = (
+        '''Quoted placeholder should not be used, as it will result in quoting the text twice. {} should be used instead of '{}' or "{}" in the template: '''
+    )
+    for unwanted in ('"{}"', "'{}'"):
+        if unwanted in cmd:
+            warnings.warn(msg + cmd, stacklevel=2)
+            cmd = cmd.replace(unwanted, '{}')
+
+    return cmd
 
 def escape_quotes(text):
-    """Escape quotes, and escaped quotes, in the specified text."""
+    """
+    Escape quotes, and escaped quotes, in the specified text.
+
+    .. note:: :func:`pipes.quote` should be favored where possible.
+    """
     return re.sub(r'\\("|\')', r'\\\\\1', text).replace('\'', '\\\'').replace('\"', '\\\"')
 
 
 def escape_single_quotes(text):
-    """Escape single quotes, and escaped single quotes, in the specified text."""
+    """
+    Escape single quotes, and escaped single quotes, in the specified text.
+
+    .. note:: :func:`pipes.quote` should be favored where possible.
+    """
     return re.sub(r'\\("|\')', r'\\\\\1', text).replace('\'', '\'\\\'\'')
 
 
 def escape_double_quotes(text):
-    """Escape double quotes, and escaped double quotes, in the specified text."""
+    """
+    Escape double quotes, and escaped double quotes, in the specified text.
+
+    .. note:: :func:`pipes.quote` should be favored where possible.
+    """
     return re.sub(r'\\("|\')', r'\\\\\1', text).replace('\"', '\\\"')
 
 
 def escape_spaces(text):
-    """Escape spaces in the specified text"""
-    return text.replace(' ', '\ ')
+    """
+    Escape spaces in the specified text
+
+    .. note:: :func:`pipes.quote` should be favored where possible.
+    """
+    return text.replace(' ', '\\ ')
 
 
 def getch(count=1):
@@ -523,6 +586,12 @@ def get_random_string(length):
 
 class LoadSyntaxError(Exception):
 
+    @property
+    def message(self):
+        if self.args:
+            return self.args[0]
+        return str(self)
+
     def __init__(self, message, filepath, lineno):
         super(LoadSyntaxError, self).__init__(message)
         self.filepath = filepath
@@ -535,6 +604,7 @@ class LoadSyntaxError(Exception):
 
 RAND_MOD_NAME_LEN = 30
 BAD_CHARS = string.punctuation + string.whitespace
+# pylint: disable=no-member
 if sys.version_info[0] == 3:
     TRANS_TABLE = str.maketrans(BAD_CHARS, '_' * len(BAD_CHARS))
 else:
@@ -639,13 +709,21 @@ def __get_memo_id(obj):
 
 
 @wrapt.decorator
-def memoized(wrapped, instance, args, kwargs):
-    """A decorator for memoizing functions and methods."""
+def memoized(wrapped, instance, args, kwargs):  # pylint: disable=unused-argument
+    """
+    A decorator for memoizing functions and methods.
+
+    .. warning:: this may not detect changes to mutable types. As long as the
+                 memoized function was used with an object as an argument
+                 before, the cached result will be returned, even if the
+                 structure of the object (e.g. a list) has changed in the mean time.
+
+    """
     func_id = repr(wrapped)
 
     def memoize_wrapper(*args, **kwargs):
         id_string = func_id + ','.join([__get_memo_id(a) for a in  args])
-        id_string += ','.join('{}={}'.format(k, v)
+        id_string += ','.join('{}={}'.format(k, __get_memo_id(v))
                               for k, v in kwargs.items())
         if id_string not in __memo_cache:
             __memo_cache[id_string] = wrapped(*args, **kwargs)
@@ -653,3 +731,256 @@ def memoized(wrapped, instance, args, kwargs):
 
     return memoize_wrapper(*args, **kwargs)
 
+@contextmanager
+def batch_contextmanager(f, kwargs_list):
+    """
+    Return a context manager that will call the ``f`` callable with the keyword
+    arguments dict in the given list, in one go.
+
+    :param f: Callable expected to return a context manager.
+
+    :param kwargs_list: list of kwargs dictionaries to be used to call ``f``.
+    :type kwargs_list: list(dict)
+    """
+    with ExitStack() as stack:
+        for kwargs in kwargs_list:
+            stack.enter_context(f(**kwargs))
+        yield
+
+
+@contextmanager
+def nullcontext(enter_result=None):
+    """
+    Backport of Python 3.7 ``contextlib.nullcontext``
+
+    This context manager does nothing, so it can be used as a default
+    placeholder for code that needs to select at runtime what context manager
+    to use.
+
+    :param enter_result: Object that will be bound to the target of the with
+        statement, or `None` if nothing is specified.
+    :type enter_result: object
+    """
+    yield enter_result
+
+
+class tls_property:
+    """
+    Use it like `property` decorator, but the result will be memoized per
+    thread. When the owning thread dies, the values for that thread will be
+    destroyed.
+
+    In order to get the values, it's necessary to call the object
+    given by the property. This is necessary in order to be able to add methods
+    to that object, like :meth:`_BoundTLSProperty.get_all_values`.
+
+    Values can be set and deleted as well, which will be a thread-local set.
+    """
+
+    @property
+    def name(self):
+        return self.factory.__name__
+
+    def __init__(self, factory):
+        self.factory = factory
+        # Lock accesses to shared WeakKeyDictionary and WeakSet
+        self.lock = threading.RLock()
+
+    def __get__(self, instance, owner=None):
+        return _BoundTLSProperty(self, instance, owner)
+
+    def _get_value(self, instance, owner):
+        tls, values = self._get_tls(instance)
+        try:
+            return tls.value
+        except AttributeError:
+            # Bind the method to `instance`
+            f = self.factory.__get__(instance, owner)
+            obj = f()
+            tls.value = obj
+            # Since that's a WeakSet, values will be removed automatically once
+            # the threading.local variable that holds them is destroyed
+            with self.lock:
+                values.add(obj)
+            return obj
+
+    def _get_all_values(self, instance, owner):
+        with self.lock:
+            # Grab a reference to all the objects at the time of the call by
+            # using a regular set
+            tls, values = self._get_tls(instance=instance)
+            return set(values)
+
+    def __set__(self, instance, value):
+        tls, values = self._get_tls(instance)
+        tls.value = value
+        with self.lock:
+            values.add(value)
+
+    def __delete__(self, instance):
+        tls, values = self._get_tls(instance)
+        with self.lock:
+            values.discard(tls.value)
+        del tls.value
+
+    def _get_tls(self, instance):
+        dct = instance.__dict__
+        name = self.name
+        try:
+            # Using instance.__dict__[self.name] is safe as
+            # getattr(instance, name) will return the property instead, as
+            # the property is a descriptor
+            tls = dct[name]
+        except KeyError:
+            with self.lock:
+                # Double check after taking the lock to avoid a race
+                if name not in dct:
+                    tls = (threading.local(), WeakSet())
+                    dct[name] = tls
+
+        return tls
+
+    @property
+    def basic_property(self):
+        """
+        Return a basic property that can be used to access the TLS value
+        without having to call it first.
+
+        The drawback is that it's not possible to do anything over than
+        getting/setting/deleting.
+        """
+        def getter(instance, owner=None):
+            prop = self.__get__(instance, owner)
+            return prop()
+
+        return property(getter, self.__set__, self.__delete__)
+
+class _BoundTLSProperty:
+    """
+    Simple proxy object to allow either calling it to get the TLS value, or get
+    some other informations by calling methods.
+    """
+    def __init__(self, tls_property, instance, owner):
+        self.tls_property = tls_property
+        self.instance = instance
+        self.owner = owner
+
+    def __call__(self):
+        return self.tls_property._get_value(
+            instance=self.instance,
+            owner=self.owner,
+        )
+
+    def get_all_values(self):
+        """
+        Returns all the thread-local values currently in use in the process for
+        that property for that instance.
+        """
+        return self.tls_property._get_all_values(
+            instance=self.instance,
+            owner=self.owner,
+        )
+
+
+class InitCheckpointMeta(type):
+    """
+    Metaclass providing an ``initialized`` and ``is_in_use`` boolean attributes
+    on instances.
+
+    ``initialized`` is set to ``True`` once the ``__init__`` constructor has
+    returned. It will deal cleanly with nested calls to ``super().__init__``.
+
+    ``is_in_use`` is set to ``True`` when an instance method is being called.
+    This allows to detect reentrance.
+    """
+    def __new__(metacls, name, bases, dct, **kwargs):
+        cls = super().__new__(metacls, name, bases, dct, **kwargs)
+        init_f = cls.__init__
+
+        @wraps(init_f)
+        def init_wrapper(self, *args, **kwargs):
+            self.initialized = False
+            self.is_in_use = False
+
+            # Track the nesting of super()__init__ to set initialized=True only
+            # when the outer level is finished
+            try:
+                stack = self._init_stack
+            except AttributeError:
+                stack = []
+                self._init_stack = stack
+
+            stack.append(init_f)
+            try:
+                x = init_f(self, *args, **kwargs)
+            finally:
+                stack.pop()
+
+            if not stack:
+                self.initialized = True
+                del self._init_stack
+
+            return x
+
+        cls.__init__ = init_wrapper
+
+        # Set the is_in_use attribute to allow external code to detect if the
+        # methods are about to be re-entered.
+        def make_wrapper(f):
+            if f is None:
+                return None
+
+            @wraps(f)
+            def wrapper(self, *args, **kwargs):
+                f_ = f.__get__(self, self.__class__)
+                initial_state = self.is_in_use
+                try:
+                    self.is_in_use = True
+                    return f_(*args, **kwargs)
+                finally:
+                    self.is_in_use = initial_state
+
+            return wrapper
+
+        # This will not decorate methods defined in base classes, but we cannot
+        # use inspect.getmembers() as it uses __get__ to bind the attributes to
+        # the class, making staticmethod indistinguishible from instance
+        # methods.
+        for name, attr in cls.__dict__.items():
+            # Only wrap the methods (exposed as functions), not things like
+            # classmethod or staticmethod
+            if (
+                name not in ('__init__', '__new__') and
+                isinstance(attr, types.FunctionType)
+            ):
+                setattr(cls, name, make_wrapper(attr))
+            elif isinstance(attr, property):
+                prop = property(
+                    fget=make_wrapper(attr.fget),
+                    fset=make_wrapper(attr.fset),
+                    fdel=make_wrapper(attr.fdel),
+                    doc=attr.__doc__,
+                )
+                setattr(cls, name, prop)
+
+        return cls
+
+
+class InitCheckpoint(metaclass=InitCheckpointMeta):
+    """
+    Inherit from this class to set the :class:`InitCheckpointMeta` metaclass.
+    """
+    pass
+
+
+def groupby_value(dct):
+    """
+    Process the input dict such that all keys sharing the same values are
+    grouped in a tuple, used as key in the returned dict.
+    """
+    key = itemgetter(1)
+    items = sorted(dct.items(), key=key)
+    return {
+        tuple(map(itemgetter(0), _items)): v
+        for v, _items in groupby(items, key=key)
+    }

devlib/utils/parse_aep.py

@@ -28,18 +28,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
-import sys
 import getopt
-import subprocess
 import logging
 import signal
-import serial
-import time
-import math
+import sys
 
 logger = logging.getLogger('aep-parser')
 
+# pylint: disable=attribute-defined-outside-init
 class AepParser(object):
     prepared = False
 
@@ -94,7 +90,7 @@ class AepParser(object):
                 continue
 
             if parent not in virtual:
-                virtual[parent] = { supply : index }
+                virtual[parent] = {supply : index}
 
             virtual[parent][supply] = index
 
@@ -102,7 +98,7 @@ class AepParser(object):
         # child
         for supply in list(virtual.keys()):
             if len(virtual[supply]) == 1:
-                del virtual[supply];
+                del virtual[supply]
 
         for supply in list(virtual.keys()):
             # Add label, hide and duplicate columns for virtual domains
@@ -121,7 +117,7 @@ class AepParser(object):
 
         label[0] = array[0]
         unit[0] = "(S)"
-        for i in range(1,len(array)):
+        for i in range(1, len(array)):
             label[i] = array[i][:-3]
             unit[i] = array[i][-3:]
 
@@ -138,7 +134,7 @@ class AepParser(object):
         # By default we assume that there is no child
         duplicate = [0] * len(label)
 
-        for i in range(len(label)):
+        for i in range(len(label)):  # pylint: disable=consider-using-enumerate
             # We only care about time and Watt
             if label[i] == 'time':
                 hide[i] = 0
@@ -167,7 +163,7 @@ class AepParser(object):
     @staticmethod
     def parse_text(array, hide):
         data = [0]*len(array)
-        for i in range(len(array)):
+        for i in range(len(array)):  # pylint: disable=consider-using-enumerate
             if hide[i]:
                 continue
 
@@ -193,18 +189,18 @@ class AepParser(object):
         return data
 
     @staticmethod
-    def delta_nrj(array, delta, min, max, hide):
+    def delta_nrj(array, delta, minimu, maximum, hide):
     # Compute the energy consumed in this time slice and add it
     # delta[0] is used to save the last time stamp
 
-        if (delta[0] < 0):
+        if delta[0] < 0:
             delta[0] = array[0]
 
         time = array[0] - delta[0]
-        if (time <= 0):
+        if time <= 0:
             return delta
 
-        for i in range(len(array)):
+        for i in range(len(array)):  # pylint: disable=consider-using-enumerate
             if hide[i]:
                 continue
 
@@ -213,10 +209,10 @@ class AepParser(object):
             except ValueError:
                 continue
 
-            if (data < min[i]):
-                min[i] = data
-            if (data > max[i]):
-                max[i] = data
+            if data < minimu[i]:
+                minimu[i] = data
+            if data > maximum[i]:
+                maximum[i] = data
             delta[i] += time * data
 
         # save last time stamp
@@ -225,11 +221,11 @@ class AepParser(object):
         return delta
 
     def output_label(self, label, hide):
-        self.fo.write(label[0]+"(uS)")
+        self.fo.write(label[0] + "(uS)")
         for i in range(1, len(label)):
             if hide[i]:
                 continue
-            self.fo.write(" "+label[i]+"(uW)")
+            self.fo.write(" " + label[i] + "(uW)")
 
         self.fo.write("\n")
 
@@ -248,34 +244,34 @@ class AepParser(object):
 
         self.fo.write("\n")
 
-    def prepare(self, infile, outfile, summaryfile):
-
+    # pylint: disable-redefined-outer-name,
+    def prepare(self, input_file, outfile, summaryfile):
         try:
-            self.fi = open(infile, "r")
+            self.fi = open(input_file, "r")
         except IOError:
-            logger.warn('Unable to open input file {}'.format(infile))
-            logger.warn('Usage: parse_arp.py -i <inputfile> [-o <outputfile>]')
+            logger.warning('Unable to open input file {}'.format(input_file))
+            logger.warning('Usage: parse_arp.py -i <inputfile> [-o <outputfile>]')
             sys.exit(2)
 
         self.parse = True
-        if len(outfile) > 0:
+        if outfile:
             try:
                 self.fo = open(outfile, "w")
             except IOError:
-                logger.warn('Unable to create {}'.format(outfile))
+                logger.warning('Unable to create {}'.format(outfile))
                 self.parse = False
         else:
-                self.parse = False
+            self.parse = False
 
         self.summary = True
-        if len(summaryfile) > 0:
+        if summaryfile:
             try:
                 self.fs = open(summaryfile, "w")
             except IOError:
-                logger.warn('Unable to create {}'.format(summaryfile))
+                logger.warning('Unable to create {}'.format(summaryfile))
                 self.fs = sys.stdout
         else:
-                self.fs = sys.stdout
+            self.fs = sys.stdout
 
         self.prepared = True
 
@@ -291,7 +287,8 @@ class AepParser(object):
 
         self.prepared = False
 
-    def parse_aep(self, start=0, lenght=-1):
+    # pylint: disable=too-many-branches,too-many-statements,redefined-outer-name,too-many-locals
+    def parse_aep(self, start=0, length=-1):
     # Parse aep data and calculate the energy consumed
         begin = 0
 
@@ -302,7 +299,7 @@ class AepParser(object):
         lines = self.fi.readlines()
 
         for myline in lines:
-            array  = myline.split()
+            array = myline.split()
 
             if "#" in myline:
                 # update power topology
@@ -331,8 +328,8 @@ class AepParser(object):
 
                 # Init arrays
                 nrj = [0]*len(label)
-                min = [100000000]*len(label)
-                max = [0]*len(label)
+                minimum = [100000000]*len(label)
+                maximum = [0]*len(label)
                 offset = [0]*len(label)
 
                 continue
@@ -342,21 +339,21 @@ class AepParser(object):
 
             # get 1st time stamp
             if begin <= 0:
-                being = data[0]
+                begin = data[0]
 
             # skip data before start
             if (data[0]-begin) < start:
                 continue
 
-            # stop after lenght
-            if lenght >= 0 and (data[0]-begin) > (start + lenght):
+            # stop after length
+            if length >= 0 and (data[0]-begin) > (start + length):
                 continue
 
             # add virtual domains
             data = self.add_virtual_data(data, virtual)
 
             # extract power figures
-            self.delta_nrj(data, nrj, min, max, hide)
+            self.delta_nrj(data, nrj, minimum, maximum, hide)
 
             # write data into new file
             if self.parse:
@@ -365,7 +362,6 @@ class AepParser(object):
         # if there is no data just return
         if label_line or len(nrj) == 1:
             raise ValueError('No data found in the data file. Please check the Arm Energy Probe')
-            return
 
         # display energy consumption of each channel and total energy consumption
         total = 0
@@ -377,27 +373,33 @@ class AepParser(object):
             nrj[i] -= offset[i] * nrj[0]
 
             total_nrj = nrj[i]/1000000000000.0
-            duration = (max[0]-min[0])/1000000.0
+            duration = (maximum[0]-minimum[0])/1000000.0
             channel_name = label[i]
             average_power = total_nrj/duration
 
-            self.fs.write("Total nrj: %8.3f J for %s -- duration %8.3f sec -- min %8.3f W -- max %8.3f W\n" % (nrj[i]/1000000000000.0, label[i], (max[0]-min[0])/1000000.0, min[i]/1000000.0, max[i]/1000000.0))
+            total = nrj[i]/1000000000000.0
+            duration = (maximum[0]-minimum[0])/1000000.0
+            min_power = minimum[i]/1000000.0
+            max_power = maximum[i]/1000000.0
+            output = "Total nrj: %8.3f J for %s -- duration %8.3f sec -- min %8.3f W -- max %8.3f W\n"
+            self.fs.write(output.format(total, label[i], duration, min_power, max_power))
 
             # store each AEP channel info  except Platform in the results table
             results_table[channel_name] = total_nrj, average_power
 
-            if (min[i] < offset[i]):
-                self.fs.write ("!!! Min below offset\n")
+            if minimum[i] < offset[i]:
+                self.fs.write("!!! Min below offset\n")
 
             if duplicate[i]:
                 continue
 
             total += nrj[i]
 
-        self.fs.write ("Total nrj: %8.3f J for %s -- duration %8.3f sec\n" % (total/1000000000000.0, "Platform ", (max[0]-min[0])/1000000.0))
+        output = "Total nrj: %8.3f J for Platform  -- duration %8.3f sec\n"
+        self.fs.write(output.format(total/1000000000000.0, (maximum[0]-minimum[0])/1000000.0))
 
         total_nrj = total/1000000000000.0
-        duration = (max[0]-min[0])/1000000.0
+        duration = (maximum[0]-minimum[0])/1000000.0
         average_power = total_nrj/duration
 
         # store AEP Platform channel info in the results table
@@ -405,11 +407,12 @@ class AepParser(object):
 
         return results_table
 
+    # pylint: disable=too-many-branches,no-self-use,too-many-locals
     def topology_from_config(self, topofile):
         try:
             ft = open(topofile, "r")
         except IOError:
-            logger.warn('Unable to open config file {}'.format(topofile))
+            logger.warning('Unable to open config file {}'.format(topofile))
             return
         lines = ft.readlines()
 
@@ -451,10 +454,11 @@ class AepParser(object):
             topo[items[0]] = info
 
             # Increase index
-            index +=1
+            index += 1
 
 
         # Create an entry for each virtual parent
+        # pylint: disable=consider-iterating-dictionary
         for supply in topo.keys():
             # Parent is in the topology
             parent = topo[supply]['parent']
@@ -462,23 +466,25 @@ class AepParser(object):
                 continue
 
             if parent not in virtual:
-                virtual[parent] = { supply : topo[supply]['index'] }
+                virtual[parent] = {supply : topo[supply]['index']}
 
             virtual[parent][supply] = topo[supply]['index']
 
 
         # Remove parent with 1 child as they don't give more information than their
         # child
+        # pylint: disable=consider-iterating-dictionary
         for supply in list(virtual.keys()):
             if len(virtual[supply]) == 1:
-                del virtual[supply];
+                del virtual[supply]
 
         topo_list = ['']*(1+len(topo)+len(virtual))
         topo_list[0] = 'time'
+        # pylint: disable=consider-iterating-dictionary
         for chnl in topo.keys():
             topo_list[topo[chnl]['index']] = chnl
         for chnl in virtual.keys():
-            index +=1
+            index += 1
             topo_list[index] = chnl
 
         ft.close()
@@ -490,6 +496,7 @@ class AepParser(object):
 
 if __name__ == '__main__':
 
+    # pylint: disable=unused-argument
     def handleSigTERM(signum, frame):
         sys.exit(2)
 
@@ -501,11 +508,11 @@ if __name__ == '__main__':
     ch.setLevel(logging.DEBUG)
     logger.addHandler(ch)
 
-    infile = ""
-    outfile = ""
+    in_file = ""
+    out_file = ""
     figurefile = ""
     start = 0
-    lenght = -1
+    length = -1
 
     try:
         opts, args = getopt.getopt(sys.argv[1:], "i:vo:s:l:t:")
@@ -515,22 +522,22 @@ if __name__ == '__main__':
 
     for o, a in opts:
         if o == "-i":
-            infile = a
+            in_file = a
         if o == "-v":
             logger.setLevel(logging.DEBUG)
         if o == "-o":
             parse = True
-            outfile = a
+            out_file = a
         if o == "-s":
             start = int(float(a)*1000000)
         if o == "-l":
-            lenght = int(float(a)*1000000)
+            length = int(float(a)*1000000)
         if o == "-t":
-            topofile = a
+            topfile = a
             parser = AepParser()
-            print(parser.topology_from_config(topofile))
+            print(parser.topology_from_config(topfile))
             exit(0)
 
     parser = AepParser()
-    parser.prepare(infile, outfile, figurefile)
-    parser.parse_aep(start, lenght)
+    parser.prepare(in_file, out_file, figurefile)
+    parser.parse_aep(start, length)

devlib/utils/rendering.py

@@ -15,15 +15,15 @@
 
 import logging
 import os
-import re
 import shutil
 import sys
 import tempfile
 import threading
 import time
-from collections import namedtuple, OrderedDict
-from distutils.version import LooseVersion
+from collections import namedtuple
+from pipes import quote
 
+# pylint: disable=redefined-builtin
 from devlib.exception  import WorkerThreadError, TargetNotRespondingError, TimeoutError
 from devlib.utils.csvutil import csvwriter
 
@@ -49,12 +49,12 @@ class FrameCollector(threading.Thread):
         self.refresh_period = None
         self.drop_threshold = None
         self.unresponsive_count = 0
-        self.last_ready_time = None
+        self.last_ready_time = 0
         self.exc = None
         self.header = None
 
     def run(self):
-        logger.debug('Surface flinger frame data collection started.')
+        logger.debug('Frame data collection started.')
         try:
             self.stop_signal.clear()
             fd, self.temp_file = tempfile.mkstemp()
@@ -71,7 +71,7 @@ class FrameCollector(threading.Thread):
         except Exception as e:  # pylint: disable=W0703
             logger.warning('Exception on collector thread: {}({})'.format(e.__class__.__name__, e))
             self.exc = WorkerThreadError(self.name, sys.exc_info())
-        logger.debug('Surface flinger frame data collection stopped.')
+        logger.debug('Frame data collection stopped.')
 
     def stop(self):
         self.stop_signal.set()
@@ -133,46 +133,58 @@ class SurfaceFlingerFrameCollector(FrameCollector):
     def collect_frames(self, wfh):
         for activity in self.list():
             if activity == self.view:
-                wfh.write(self.get_latencies(activity))
+                wfh.write(self.get_latencies(activity).encode('utf-8'))
 
     def clear(self):
         self.target.execute('dumpsys SurfaceFlinger --latency-clear ')
 
     def get_latencies(self, activity):
-        cmd = 'dumpsys SurfaceFlinger --latency "{}"'
-        return self.target.execute(cmd.format(activity))
+        cmd = 'dumpsys SurfaceFlinger --latency {}'
+        return self.target.execute(cmd.format(quote(activity)))
 
     def list(self):
         text = self.target.execute('dumpsys SurfaceFlinger --list')
         return text.replace('\r\n', '\n').replace('\r', '\n').split('\n')
 
     def _process_raw_file(self, fh):
+        found = False
         text = fh.read().replace('\r\n', '\n').replace('\r', '\n')
         for line in text.split('\n'):
             line = line.strip()
-            if line:
-                self._process_trace_line(line)
+            if not line:
+                continue
+            if 'SurfaceFlinger appears to be unresponsive, dumping anyways' in line:
+                self.unresponsive_count += 1
+                continue
+            parts = line.split()
+            # We only want numerical data, ignore textual data.
+            try:
+                parts = list(map(int, parts))
+            except ValueError:
+                continue
+            found = True
+            self._process_trace_parts(parts)
+        if not found:
+            logger.warning('Could not find expected SurfaceFlinger output.')
 
-    def _process_trace_line(self, line):
-        parts = line.split()
+    def _process_trace_parts(self, parts):
         if len(parts) == 3:
-            frame = SurfaceFlingerFrame(*list(map(int, parts)))
+            frame = SurfaceFlingerFrame(*parts)
             if not frame.frame_ready_time:
                 return # "null" frame
             if frame.frame_ready_time <= self.last_ready_time:
                 return  # duplicate frame
             if (frame.frame_ready_time - frame.desired_present_time) > self.drop_threshold:
-                logger.debug('Dropping bogus frame {}.'.format(line))
+                logger.debug('Dropping bogus frame {}.'.format(' '.join(map(str, parts))))
                 return  # bogus data
             self.last_ready_time = frame.frame_ready_time
             self.frames.append(frame)
         elif len(parts) == 1:
-            self.refresh_period = int(parts[0])
+            self.refresh_period = parts[0]
             self.drop_threshold = self.refresh_period * 1000
-        elif 'SurfaceFlinger appears to be unresponsive, dumping anyways' in line:
-            self.unresponsive_count += 1
         else:
-            logger.warning('Unexpected SurfaceFlinger dump output: {}'.format(line))
+            msg = 'Unexpected SurfaceFlinger dump output: {}'.format(' '.join(map(str, parts)))
+            logger.warning(msg)
 
 
 def read_gfxinfo_columns(target):
@@ -190,12 +202,16 @@ class GfxinfoFrameCollector(FrameCollector):
     def __init__(self, target, period, package, header=None):
         super(GfxinfoFrameCollector, self).__init__(target, period)
         self.package = package
-        self.header =  None
+        self.header = None
         self._init_header(header)
 
     def collect_frames(self, wfh):
         cmd = 'dumpsys gfxinfo {} framestats'
-        wfh.write(self.target.execute(cmd.format(self.package)))
+        result = self.target.execute(cmd.format(self.package))
+        if sys.version_info[0] == 3:
+            wfh.write(result.encode('utf-8'))
+        else:
+            wfh.write(result)
 
     def clear(self):
         pass
@@ -261,7 +277,7 @@ def gfxinfo_get_last_dump(filepath):
 
                 ix = buf.find(' **\n')
                 if ix >= 0:
-                    buf =  next(fh_iter) + buf
+                    buf = next(fh_iter) + buf
                     ix = buf.find('** Graphics')
                     if ix < 0:
                         msg = '"{}" appears to be corrupted'

devlib/utils/serial_port.py

@@ -20,6 +20,7 @@ from logging import Logger
 
 import serial
 
+# pylint: disable=import-error,wrong-import-position,ungrouped-imports,wrong-import-order
 import pexpect
 from distutils.version import StrictVersion as V
 if V(pexpect.__version__) < V('4.0.0'):
@@ -48,6 +49,7 @@ def pulse_dtr(conn, state=True, duration=0.1):
     conn.setDTR(not state)
 
 
+# pylint: disable=keyword-arg-before-vararg
 def get_connection(timeout, init_dtr=None, logcls=SerialLogger,
                    logfile=None, *args, **kwargs):
     if init_dtr is not None:
@@ -89,6 +91,7 @@ def write_characters(conn, line, delay=0.05):
     conn.sendline('')
 
 
+# pylint: disable=keyword-arg-before-vararg
 @contextmanager
 def open_serial_connection(timeout, get_conn=False, init_dtr=None,
                            logcls=SerialLogger, *args, **kwargs):
@@ -111,11 +114,13 @@ def open_serial_connection(timeout, get_conn=False, init_dtr=None,
     """
     target, conn = get_connection(timeout, init_dtr=init_dtr,
                                   logcls=logcls, *args, **kwargs)
+
     if get_conn:
-        yield target, conn
+        target_and_conn = (target, conn)
     else:
-        yield target
-
-    target.close()  # Closes the file descriptor used by the conn.
-    del conn
+        target_and_conn = target
 
+    try:
+        yield target_and_conn
+    finally:
+        target.close()  # Closes the file descriptor used by the conn.

devlib/utils/types.py

@@ -153,11 +153,11 @@ if sys.version_info[0] == 3:
         if isinstance(value, regex_type):
             if isinstance(value.pattern, bytes):
                 return value
-            return re.compile(value.pattern.encode(sys.stdout.encoding),
+            return re.compile(value.pattern.encode(sys.stdout.encoding or 'utf-8'),
                               value.flags & ~re.UNICODE)
         else:
             if isinstance(value, str):
-                value = value.encode(sys.stdout.encoding)
+                value = value.encode(sys.stdout.encoding or 'utf-8')
             return re.compile(value)
 else:
     def regex(value):

devlib/utils/uboot.py

@@ -113,4 +113,3 @@ class UbootMenu(object):
         except TIMEOUT:
             pass
         self.conn.buffer = ''
-

devlib/utils/uefi.py

@@ -237,5 +237,3 @@ class UefiMenu(object):
         self.options = {}
         self.prompt = None
         self.empty_buffer()
-
-

devlib/utils/version.py

@@ -15,16 +15,34 @@
 
 import os
 import sys
+from collections import namedtuple
 from subprocess import Popen, PIPE
 
+
+VersionTuple = namedtuple('Version', ['major', 'minor', 'revision', 'dev'])
+
+version = VersionTuple(1, 3, 4, '')
+
+
+def get_devlib_version():
+    version_string = '{}.{}.{}'.format(
+        version.major, version.minor, version.revision)
+    if version.dev:
+        version_string += '.{}'.format(version.dev)
+    return version_string
+
+
 def get_commit():
-    p = Popen(['git', 'rev-parse', 'HEAD'], cwd=os.path.dirname(__file__),
-              stdout=PIPE, stderr=PIPE)
+    try:
+        p = Popen(['git', 'rev-parse', 'HEAD'], cwd=os.path.dirname(__file__),
+                  stdout=PIPE, stderr=PIPE)
+    except FileNotFoundError:
+        return None
     std, _ = p.communicate()
     p.wait()
     if p.returncode:
         return None
-    if sys.version_info[0] == 3:
-        return std[:8].decode(sys.stdout.encoding, 'replace')
+    if sys.version_info[0] == 3 and isinstance(std, bytes):
+        return std[:8].decode(sys.stdout.encoding or 'utf-8', 'replace')
     else:
         return std[:8]

doc/collectors.rst

@@ -0,0 +1,153 @@
+.. _collector:
+
+Collectors
+==========
+
+The ``Collector`` API provide a consistent way of collecting arbitrary data from
+a target. Data is collected via an instance of a class derived from
+:class:`CollectorBase`.
+
+
+Example
+-------
+
+The following example shows how to use a collector to read the logcat output
+from an Android target.
+
+.. code-block:: python
+
+    # import and instantiate the Target and the collector
+    # (note: this assumes exactly one android target connected
+    #  to the host machine).
+    In [1]: from devlib import AndroidTarget, LogcatCollector
+
+    In [2]: t = AndroidTarget()
+
+    # Set up the collector on the Target.
+
+    In [3]: collector = LogcatCollector(t)
+
+    # Configure the output file path for the collector to use.
+    In [4]: collector.set_output('adb_log.txt')
+
+    # Reset the Collector to preform any required configuration or preparation.
+    In [5]: collector.reset()
+
+    # Start Collecting
+    In [6]: collector.start()
+
+    # Wait for some output to be generated
+    In [7]: sleep(10)
+
+    # Stop Collecting
+    In [8]: collector.stop()
+
+    # Retrieved the collected data
+    In [9]: output = collector.get_data()
+
+    # Display the returned ``CollectorOutput`` Object.
+    In [10]: output
+    Out[10]: [<adb_log.txt (file)>]
+
+    In [11] log_file = output[0]
+
+    # Get the path kind of the the returned CollectorOutputEntry.
+    In [12]: log_file.path_kind
+    Out[12]: 'file'
+
+    # Get the path of the returned CollectorOutputEntry.
+    In [13]: log_file.path
+    Out[13]: 'adb_log.txt'
+
+    # Find the full path to the log file.
+    In [14]: os.path.join(os.getcwd(), logfile)
+    Out[14]: '/tmp/adb_log.txt'
+
+
+API
+---
+.. collector:
+
+.. module:: devlib.collector
+
+
+CollectorBase
+~~~~~~~~~~~~~
+
+.. class:: CollectorBase(target, \*\*kwargs)
+
+   A ``CollectorBase`` is the the base class and API that should be
+   implemented to allowing collecting various data from a traget e.g. traces,
+   logs etc.
+
+.. method::  Collector.setup(\*args, \*\*kwargs)
+
+   This will set up the collector on the target. Parameters this method takes
+   are particular to subclasses (see documentation for specific collectors
+   below).  What actions are performed by this method are also
+   collector-specific.  Usually these will be things like  installing
+   executables, starting services, deploying assets, etc. Typically, this method
+   needs to be invoked at most once per reboot of the target (unless
+   ``teardown()`` has been called), but see documentation for the collector
+   you're interested in.
+
+.. method:: CollectorBase.reset()
+
+   This can be used to configure a collector for collection. This must be invoked
+   before ``start()`` is called to begin collection.
+
+.. method:: CollectorBase.start()
+
+   Starts collecting from the target.
+
+.. method:: CollectorBase.stop()
+
+   Stops collecting from target. Must be called after
+   :func:`start()`.
+
+
+.. method:: CollectorBase.set_output(output_path)
+
+   Configure the output path for the particular collector. This will be either
+   a directory or file path which will be used when storing the data. Please see
+   the individual Collector documentation for more information.
+
+
+.. method:: CollectorBase.get_data()
+
+    The collected data will be return via the previously specified output_path.
+    This method will return a ``CollectorOutput`` object which is a subclassed
+    list object containing individual ``CollectorOutputEntry`` objects with details
+    about the individual output entry.
+
+
+CollectorOutputEntry
+~~~~~~~~~~~~~~~~~~~~
+
+This object is designed to allow for the output of a collector to be processed
+generically. The object will behave as a regular string containing the path to
+underlying output path and can be used directly in ``os.path`` operations.
+
+.. attribute:: CollectorOutputEntry.path
+
+    The file path for the corresponding output item.
+
+.. attribute:: CollectorOutputEntry.path_kind
+
+    The type of output the is specified in the ``path`` attribute. Current valid
+    kinds are: ``file`` and ``directory``.
+
+.. method:: CollectorOutputEntry.__init__(path, path_kind)
+
+    Initialises a ``CollectorOutputEntry`` object with the desired file path and
+    kind of file path specified.
+
+
+.. collectors:
+
+Available Collectors
+---------------------
+
+This section lists collectors that are currently part of devlib.
+
+.. todo:: Add collectors

doc/conf.py

@@ -31,6 +31,9 @@ import shlex
 # ones.
 extensions = [
     'sphinx.ext.autodoc',
+    'sphinx.ext.graphviz',
+    'sphinx.ext.mathjax',
+    'sphinx.ext.todo',
     'sphinx.ext.viewcode',
 ]
 
@@ -58,9 +61,9 @@ author = u'ARM Limited'
 # built documents.
 #
 # The short X.Y version.
-version = '0.1'
+version = '1.0.0'
 # The full version, including alpha/beta/rc tags.
-release = '0.1'
+release = '1.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -104,7 +107,7 @@ pygments_style = 'sphinx'
 #keep_warnings = False
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
-todo_include_todos = False
+todo_include_todos = True
 
 
 # -- Options for HTML output ----------------------------------------------

doc/connection.rst

@@ -3,16 +3,17 @@ Connection
 
 A :class:`Connection` abstracts an actual physical connection to a device. The
 first connection is created when :func:`Target.connect` method is called. If a
-:class:`Target` is used in a multi-threaded environment, it will maintain a
-connection for each thread in which it is invoked. This allows the same target
-object to be used in parallel in multiple threads.
+:class:`~devlib.target.Target` is used in a multi-threaded environment, it will
+maintain a connection for each thread in which it is invoked. This allows
+the same target object to be used in parallel in multiple threads.
 
 :class:`Connection`\ s will be automatically created and managed by
-:class:`Target`\ s, so there is usually no reason to create one manually.
-Instead, configuration for a :class:`Connection` is passed as
-`connection_settings` parameter when creating a :class:`Target`. The connection
-to be used target is also specified on instantiation by `conn_cls` parameter,
-though all concrete :class:`Target` implementations will set an appropriate
+:class:`~devlib.target.Target`\ s, so there is usually no reason to create one
+manually. Instead, configuration for a :class:`Connection` is passed as
+`connection_settings` parameter when creating a
+:class:`~devlib.target.Target`. The connection to be used target is also
+specified on instantiation by `conn_cls` parameter, though all concrete
+:class:`~devlib.target.Target` implementations will set an appropriate
 default, so there is typically no need to specify this explicitly.
 
 :class:`Connection` classes are not a part of an inheritance hierarchy, i.e.
@@ -20,27 +21,27 @@ they do not derive from a common base. Instead, a :class:`Connection` is any
 class that implements the following methods.
 
 
-.. method:: push(self, source, dest, timeout=None)
+.. method:: push(self, sources, dest, timeout=None)
 
-   Transfer a file from the host machine to the connected device.
+   Transfer a list of files from the host machine to the connected device.
 
-   :param source: path of to the file on the host
-   :param dest: path of to the file on the connected device.
-   :param timeout: timeout (in seconds) for the transfer; if the transfer does
-       not  complete within this period, an exception will be raised.
+   :param sources: list of paths on the host
+   :param dest: path to the file or folder on the connected device.
+   :param timeout: timeout (in seconds) for the transfer of each file; if the
+       transfer does not complete within this period, an exception will be
+       raised.
 
-.. method:: pull(self, source, dest, timeout=None)
+.. method:: pull(self, sources, dest, timeout=None)
 
-   Transfer a file, or files matching a glob pattern, from the connected device
-   to the host machine.
+   Transfer a list of files from the connected device to the host machine.
 
-   :param source: path of to the file on the connected device. If ``dest`` is a
-       directory, may be a glob pattern.
-   :param dest: path of to the file on the host
-   :param timeout: timeout (in seconds) for the transfer; if the transfer does
-       not  complete within this period, an exception will be raised.
+   :param sources: list of paths on the connected device.
+   :param dest: path to the file or folder on the host
+   :param timeout: timeout (in seconds) for the transfer for each file; if the
+       transfer does not complete within this period, an exception will be
+       raised.
 
-.. method:: execute(self, command, timeout=None, check_exit_code=False, as_root=False)
+.. method:: execute(self, command, timeout=None, check_exit_code=False, as_root=False, strip_colors=True, will_succeed=False)
 
    Execute the specified command on the connected device and return its output.
 
@@ -53,6 +54,13 @@ class that implements the following methods.
        raised if it is not ``0``.
    :param as_root: The command will be executed as root. This will fail on
        unrooted connected devices.
+   :param strip_colours: The command output will have colour encodings and
+       most ANSI escape sequences striped out before returning.
+   :param will_succeed: The command is assumed to always succeed, unless there is
+       an issue in the environment like the loss of network connectivity. That
+       will make the method always raise an instance of a subclass of
+       :class:`DevlibTransientError` when the command fails, instead of a
+       :class:`DevlibStableError`.
 
 .. method:: background(self, command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, as_root=False)
 
@@ -69,7 +77,7 @@ class that implements the following methods.
 
    .. note:: This **will block the connection** until the command completes.
 
-.. note:: The above methods are directly wrapped by :class:`Target` methods,
+.. note:: The above methods are directly wrapped by :class:`~devlib.target.Target` methods,
           however note that some of the defaults are different.
 
 .. method:: cancel_running_command(self)
@@ -93,7 +101,12 @@ class that implements the following methods.
 Connection Types
 ----------------
 
-.. class:: AdbConnection(device=None, timeout=None)
+
+.. module:: devlib.utils.android
+
+.. class:: AdbConnection(device=None, timeout=None, adb_server=None, adb_as_root=False, connection_attempts=MAX_ATTEMPTS,\
+                         poll_transfers=False, start_transfer_poll_delay=30, total_transfer_timeout=3600,\
+                         transfer_poll_period=30)
 
     A connection to an android device via ``adb`` (Android Debug Bridge).
     ``adb`` is part of the Android SDK (though stand-alone versions are also
@@ -106,10 +119,37 @@ Connection Types
     :param timeout: Connection timeout in seconds. If a connection to the device
                     is not established within this period, :class:`HostError`
                     is raised.
+    :param adb_server: Allows specifying the address of the adb server to use.
+    :param adb_as_root: Specify whether the adb server should be restarted in root mode.
+    :param connection_attempts: Specify how many connection attempts, 10 seconds
+                                apart, should be attempted to connect to the device.
+                                Defaults to 5.
+    :param poll_transfers: Specify whether file transfers should be polled. Polling
+                           monitors the progress of file transfers and periodically
+                           checks whether they have stalled, attempting to cancel
+                           the transfers prematurely if so.
+    :param start_transfer_poll_delay: If transfers are polled, specify the length of
+                                      time after a transfer has started before polling
+                                      should start.
+    :param total_transfer_timeout: If transfers are polled, specify the total amount of time
+                                   to elapse before the transfer is cancelled, regardless
+                                   of its activity.
+    :param transfer_poll_period: If transfers are polled, specify the period at which
+                                 the transfers are sampled for activity. Too small values
+                                 may cause the destination size to appear the same over
+                                 one or more sample periods, causing improper transfer
+                                 cancellation.
 
 
-.. class:: SshConnection(host, username, password=None, keyfile=None, port=None,\
-                         timeout=None, password_prompt=None)
+
+.. module:: devlib.utils.ssh
+
+.. class:: SshConnection(host, username, password=None, keyfile=None, port=22,\
+                         timeout=None, platform=None, \
+                         sudo_cmd="sudo -- sh -c {}", strict_host_check=True, \
+                         use_scp=False, poll_transfers=False, \
+                         start_transfer_poll_delay=30, total_transfer_timeout=3600,\
+                         transfer_poll_period=30)
 
     A connection to a device on the network over SSH.
 
@@ -117,6 +157,9 @@ Connection Types
     :param username: username for SSH login
     :param password: password for the SSH connection
 
+                     .. note:: To connect to a system without a password this
+                               parameter should be set to an empty string otherwise
+                               ssh key authentication will be attempted.
                      .. note:: In order to user password-based authentication,
                                ``sshpass`` utility must be installed on the
                                system.
@@ -131,10 +174,26 @@ Connection Types
     :param timeout: Timeout for the connection in seconds. If a connection
                     cannot be established within this time, an error will be
                     raised.
-    :param password_prompt: A string with the password prompt used by
-                            ``sshpass``. Set this if your version of ``sshpass``
-                            uses something other than ``"[sudo] password"``.
-
+    :param platform: Specify the platform to be used. The generic :class:`~devlib.platform.Platform`
+                     class is used by default.
+    :param sudo_cmd: Specify the format of the command used to grant sudo access.
+    :param strict_host_check: Specify the ssh connection parameter ``StrictHostKeyChecking``,
+    :param use_scp: Use SCP for file transfers, defaults to SFTP.
+    :param poll_transfers: Specify whether file transfers should be polled. Polling
+                           monitors the progress of file transfers and periodically
+                           checks whether they have stalled, attempting to cancel
+                           the transfers prematurely if so.
+    :param start_transfer_poll_delay: If transfers are polled, specify the length of
+                                      time after a transfer has started before polling
+                                      should start.
+    :param total_transfer_timeout: If transfers are polled, specify the total amount of time
+                                   to elapse before the transfer is cancelled, regardless
+                                   of its activity.
+    :param transfer_poll_period: If transfers are polled, specify the period at which
+                                 the transfers are sampled for activity. Too small values
+                                 may cause the destination size to appear the same over
+                                 one or more sample periods, causing improper transfer
+                                 cancellation.
 
 .. class:: TelnetConnection(host, username, password=None, port=None,\
                             timeout=None, password_prompt=None,\
@@ -167,6 +226,7 @@ Connection Types
                             connection to reduce the possibility of clashes).
                             This parameter is ignored for SSH connections.
 
+.. module:: devlib.host
 
 .. class:: LocalConnection(keep_password=True, unrooted=False, password=None)
 
@@ -182,6 +242,9 @@ Connection Types
                      prompting for it.
 
 
+.. module:: devlib.utils.ssh
+   :noindex:
+
 .. class:: Gem5Connection(platform, host=None, username=None, password=None,\
                           timeout=None, password_prompt=None,\
                           original_prompt=None)
@@ -190,19 +253,18 @@ Connection Types
 
     .. note:: Some of the following input parameters are optional and will be ignored during
               initialisation. They were kept to keep the analogy with a :class:`TelnetConnection`
-              (i.e. ``host``, `username``, ``password``, ``port``,
+              (i.e. ``host``, ``username``, ``password``, ``port``,
               ``password_prompt`` and ``original_promp``)
 
 
     :param host: Host on which the gem5 simulation is running
 
-                     .. note:: Even thought the input parameter for the ``host``
-                               will be ignored, the gem5 simulation needs to on
-                               the same host as the user as the user is
-                               currently on, so if the host given as input
-                               parameter is not the same as the actual host, a
-                               ``TargetError`` will be raised to prevent
-                               confusion.
+                     .. note:: Even though the input parameter for the ``host``
+                               will be ignored, the gem5 simulation needs to be
+                               on the same host the user is currently on, so if
+                               the host given as input parameter is not the
+                               same as the actual host, a :class:`TargetStableError`
+                               will be raised to prevent confusion.
 
     :param username: Username in the simulated system
     :param password: No password required in gem5 so does not need to be set
@@ -227,14 +289,14 @@ The only methods discussed below are those that will be overwritten by the
 
     A connection to a gem5 simulation that emulates a Linux system.
 
-.. method:: _login_to_device(self)
+    .. method:: _login_to_device(self)
 
-    Login to the gem5 simulated system.
+        Login to the gem5 simulated system.
 
 .. class:: AndroidGem5Connection
 
     A connection to a gem5 simulation that emulates an Android system.
 
-.. method:: _wait_for_boot(self)
+    .. method:: _wait_for_boot(self)
 
-    Wait for the gem5 simulated system to have booted and finished the booting animation.
+        Wait for the gem5 simulated system to have booted and finished the booting animation.

doc/derived_measurements.rst

@@ -1,7 +1,6 @@
 Derived Measurements
 =====================
 
-
 The ``DerivedMeasurements`` API provides a consistent way of performing post
 processing on a provided :class:`MeasurementCsv` file.
 
@@ -35,6 +34,8 @@ API
 Derived Measurements
 ~~~~~~~~~~~~~~~~~~~~
 
+.. module:: devlib.derived
+
 .. class:: DerivedMeasurements
 
    The ``DerivedMeasurements`` class provides an API for post-processing
@@ -102,17 +103,20 @@ Available Derived Measurements
 Energy
 ~~~~~~
 
+.. module:: devlib.derived.energy
+
 .. class:: DerivedEnergyMeasurements
 
-   The ``DerivedEnergyMeasurements`` class is used to calculate average power and
-   cumulative energy for each site if the required data is present.
+   The ``DerivedEnergyMeasurements`` class is used to calculate average power
+   and cumulative energy for each site if the required data is present.
 
-   The calculation of cumulative energy can occur in 3 ways. If a
-   ``site`` contains ``energy`` results, the first and last measurements are extracted
-   and the delta calculated. If not, a ``timestamp`` channel will be used to calculate
-   the energy from the power channel, failing back to using the sample rate attribute
-   of the :class:`MeasurementCsv` file if timestamps are not available. If neither
-   timestamps or a sample rate are available then an error will be raised.
+   The calculation of cumulative energy can occur in 3 ways. If a ``site``
+   contains ``energy`` results, the first and last measurements are extracted
+   and the delta calculated. If not, a ``timestamp`` channel will be used to
+   calculate the energy from the power channel, failing back to using the sample
+   rate attribute of the :class:`MeasurementCsv` file if timestamps are not
+   available. If neither timestamps or a sample rate are available then an error
+   will be raised.
 
 
 .. method:: DerivedEnergyMeasurements.process(measurement_csv)
@@ -128,6 +132,8 @@ Energy
 FPS / Rendering
 ~~~~~~~~~~~~~~~
 
+.. module:: devlib.derived.fps
+
 .. class:: DerivedGfxInfoStats(drop_threshold=5, suffix='-fps', filename=None, outdir=None)
 
    Produces FPS (frames-per-second) and other derived statistics from