def CollectProfile(self):
if ('renderer' in self._output_file and not self._is_android
and not self._platform_backend.GetCommandLine(self._pid)):
logging.warning('Renderer was swapped out during profiling. '
'To collect a full profile rerun with '
'"--extra-browser-args=--single-process"')
if self._is_android:
device = self._browser_backend.device
try:
binary_name = os.path.basename(self._perf_binary)
device.KillAll(binary_name,
signum=signal.SIGINT,
blocking=True,
quiet=True)
except device_errors.CommandFailedError:
logging.warning(
'The perf process could not be killed on the device.')
self._proc.send_signal(signal.SIGINT)
exit_code = self._proc.wait()
try:
if exit_code == 128:
raise Exception("""perf failed with exit code 128.
Try rerunning this script under sudo or setting
/proc/sys/kernel/perf_event_paranoid to "-1".\nOutput:\n%s""" %
self._GetStdOut())
elif exit_code not in (0, -2):
raise Exception('perf failed with exit code %d. Output:\n%s' %
(exit_code, self._GetStdOut()))
finally:
self._tmp_output_file.close()
cmd = '%s report -n -i %s' % (_NicePath(
self._perfhost_binary), self._output_file)
if self._is_android:
device = self._browser_backend.device
device.PullFile(self._device_output_file, self._output_file)
required_libs = \
android_profiling_helper.GetRequiredLibrariesForPerfProfile(
self._output_file)
symfs_root = os.path.join(os.path.dirname(self._output_file),
'symfs')
if not os.path.exists(symfs_root):
os.makedirs(symfs_root)
kallsyms = android_profiling_helper.CreateSymFs(device,
symfs_root,
required_libs,
use_symlinks=True)
cmd += ' --symfs %s --kallsyms %s' % (symfs_root, kallsyms)
for lib in required_libs:
lib = os.path.join(symfs_root, lib[1:])
if not os.path.exists(lib):
continue
objdump_path = android_profiling_helper.GetToolchainBinaryPath(
lib, 'objdump')
if objdump_path:
cmd += ' --objdump %s' % _NicePath(objdump_path)
break
print 'To view the profile, run:'
print ' ', cmd
return self._output_file
def _GetInteractivePerfCommand(perfhost_path, perf_profile, symfs_dir,
required_libs, kallsyms):
cmd = '%s report -n -i %s --symfs %s --kallsyms %s' % (os.path.relpath(
perfhost_path, '.'), perf_profile, symfs_dir, kallsyms)
for lib in required_libs:
lib = os.path.join(symfs_dir, lib[1:])
if not os.path.exists(lib):
continue
objdump_path = android_profiling_helper.GetToolchainBinaryPath(
lib, 'objdump')
if objdump_path:
cmd += ' --objdump %s' % os.path.relpath(objdump_path, '.')
break
return cmd
def testGetToolchainBinaryPath(self):
with tempfile.NamedTemporaryFile() as libc:
self._device.PullFile('/system/lib/libc.so', libc.name)
path = android_profiling_helper.GetToolchainBinaryPath(
libc.name, 'objdump')
assert path and os.path.exists(path)
