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Code Issues Releases Wiki Activity

ftrace: add an option to report on target

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trace-cmd is a Linux-specific executable that is not available on other
operating systems (even on other Unixes). The option to report on target
allows acquiring text trace even if the host is not running Linux.
This commit is contained in:
Sergei Trofimov 2017-05-12 09:04:50 +01:00
parent 61b13383a4
commit 92d9e690f0
1 changed files with 18 additions and 3 deletions
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21
devlib/trace/ftrace.py
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@ -60,6 +60,7 @@ class FtraceCollector(TraceCollector):
autoview=False,
no_install=False,
strict=False,
report_on_target=False,
):
super(FtraceCollector, self).__init__(target)
self.events = events if events is not None else DEFAULT_EVENTS
@ -70,7 +71,10 @@ class FtraceCollector(TraceCollector):
self.automark = automark
self.autoreport = autoreport
self.autoview = autoview
self.target_output_file = os.path.join(self.target.working_directory, OUTPUT_TRACE_FILE)
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.target_binary = None
self.host_binary = None
self.start_time = None
@ -93,7 +97,7 @@ class FtraceCollector(TraceCollector):
if not self.target.is_rooted:
raise TargetError('trace-cmd instrument cannot be used on an unrooted device.')
if self.autoreport and self.host_binary is None:
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:
raise HostError('kernelshark binary must be installed on the host if autoview=True.')
@ -217,7 +221,12 @@ class FtraceCollector(TraceCollector):
else:
if self.autoreport:
textfile = os.path.splitext(outfile)[0] + '.txt'
self.report(outfile, textfile)
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)
if self.autoview:
self.view(outfile)
@ -287,6 +296,12 @@ class FtraceCollector(TraceCollector):
except OSError:
raise HostError('Could not find trace-cmd. Please make sure it is installed and is in PATH.')
def generate_report_on_target(self):
command = '{} report {} > {}'.format(self.target_binary,
self.target_output_file,
self.target_text_file)
self.target.execute(command, timeout=TIMEOUT)
def view(self, binfile):
check_output('{} {}'.format(self.kernelshark, binfile), shell=True)