From f6fa6ba79336531a4ed352f7fd77257e6865a3fc Mon Sep 17 00:00:00 2001
From: Brendan Jackman <brendan.jackman@arm.com>
Date: Wed, 11 Oct 2017 13:00:45 +0100
Subject: [PATCH] instrumentation: Port dmesg instrument from WA2
---
wa/instrumentation/dmesg.py | 67 +++++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644 wa/instrumentation/dmesg.py
diff --git a/wa/instrumentation/dmesg.py b/wa/instrumentation/dmesg.py
new file mode 100644
index 00000000..05cdeba0
--- /dev/null
+++ b/wa/instrumentation/dmesg.py
@@ -0,0 +1,67 @@
+# Copyright 2014-2017 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
+
+from wa import Instrument, Parameter
+from wa.framework.exception import InstrumentError
+from wa.framework.instrumentation import slow
+from wa.utils.misc import ensure_file_directory_exists as _f
+
+class DmesgInstrument(Instrument):
+ # pylint: disable=no-member,attribute-defined-outside-init
+ """
+ Collected dmesg output before and during the run.
+
+ """
+
+ name = 'dmesg'
+
+ parameters = [
+ Parameter('loglevel', kind=int, allowed_values=range(8),
+ description='Set loglevel for console output.')
+ ]
+
+ loglevel_file = '/proc/sys/kernel/printk'
+
+ def initialize(self, context):
+ self.need_root = self.target.os == 'android'
+ if self.need_root and not self.target.is_rooted:
+ raise InstrumentError('Need root to collect dmesg on Android')
+
+ def setup(self, context):
+ if self.loglevel:
+ self.old_loglevel = self.target.get_sysfile_value(self.loglevel_file)
+ self.target.set_sysfile_value(self.loglevel_file, self.loglevel, verify=False)
+ self.before_file = _f(os.path.join(context.output_directory, 'dmesg', 'before'))
+ self.after_file = _f(os.path.join(context.output_directory, 'dmesg', 'after'))
+
+ @slow
+ def start(self, context):
+ with open(self.before_file, 'w') as wfh:
+ wfh.write(self.target.execute('dmesg', as_root=self.need_root))
+ context.add_artifact('dmesg_before', self.before_file, kind='data')
+ if self.target.is_rooted:
+ self.target.execute('dmesg -c', as_root=True)
+
+ def stop(self, context):
+ with open(self.after_file, 'w') as wfh:
+ wfh.write(self.target.execute('dmesg', as_root=self.need_root))
+ context.add_artifact('dmesg_after', self.after_file, kind='data')
+
+ def teardown(self, context): # pylint: disable=unused-argument
+ if self.loglevel:
+ self.target.set_sysfile_value(self.loglevel_file, self.old_loglevel, verify=False)