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# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import optparse
import os
import py_utils
import re
from profile_chrome import util
from systrace import trace_result
from systrace import tracing_agents
_DDMS_SAMPLING_FREQUENCY_US = 100
class DdmsAgent(tracing_agents.TracingAgent):
def __init__(self, device, package_info):
tracing_agents.TracingAgent.__init__(self)
self._device = device
self._package = package_info.package
self._output_file = None
self._supports_sampling = self._SupportsSampling()
def __repr__(self):
return 'ddms profile'
def _SupportsSampling(self):
for line in self._device.RunShellCommand(
['am', '--help'], check_return=True):
if re.match(r'.*am profile start.*--sampling', line):
return True
return False
@py_utils.Timeout(tracing_agents.START_STOP_TIMEOUT)
def StartAgentTracing(self, config, timeout=None):
self._output_file = (
'/data/local/tmp/ddms-profile-%s' % util.GetTraceTimestamp())
cmd = ['am', 'profile', 'start']
if self._supports_sampling:
cmd.extend(['--sampling', str(_DDMS_SAMPLING_FREQUENCY_US)])
cmd.extend([self._package, self._output_file])
self._device.RunShellCommand(cmd, check_return=True)
return True
@py_utils.Timeout(tracing_agents.START_STOP_TIMEOUT)
def StopAgentTracing(self, timeout=None):
self._device.RunShellCommand(
['am', 'profile', 'stop', self._package], check_return=True)
return True
@py_utils.Timeout(tracing_agents.GET_RESULTS_TIMEOUT)
def GetResults(self, timeout=None):
with open(self._PullTrace(), 'r') as f:
trace_data = f.read()
return trace_result.TraceResult('ddms', trace_data)
def _PullTrace(self):
if not self._output_file:
return None
host_file = os.path.join(
os.path.curdir, os.path.basename(self._output_file))
self._device.PullFile(self._output_file, host_file)
return host_file
def SupportsExplicitClockSync(self):
return False
def RecordClockSyncMarker(self, sync_id, did_record_sync_marker_callback):
# pylint: disable=unused-argument
assert self.SupportsExplicitClockSync(), ('Clock sync marker cannot be '
'recorded since explicit clock sync is not supported.')
class DdmsConfig(tracing_agents.TracingConfig):
def __init__(self, device, package_info, ddms):
tracing_agents.TracingConfig.__init__(self)
self.device = device
self.package_info = package_info
self.ddms = ddms
def try_create_agent(config):
if config.ddms:
return DdmsAgent(config.device, config.package_info)
return None
def add_options(parser):
options = optparse.OptionGroup(parser, 'Java tracing')
options.add_option('--ddms', help='Trace Java execution using DDMS '
'sampling.', action='store_true')
return options
def get_config(options):
return DdmsConfig(options.device, options.package_info, options.ddms)
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