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#!/usr/bin/env python
# Copyright (c) 2011 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.
"""Android system-wide tracing utility.
This is a tool for capturing a trace that includes data from both userland and
the kernel. It creates an HTML file for visualizing the trace.
"""
# Make sure we're using a new enough version of Python.
# The flags= parameter of re.sub() is new in Python 2.7. And Systrace does not
# support Python 3 yet.
# pylint: disable=wrong-import-position
import sys
version = sys.version_info[:2]
if version != (2, 7):
sys.stderr.write('This script does not support Python %d.%d. '
'Please use Python 2.7.\n' % version)
sys.exit(1)
import optparse
import os
import time
_SYSTRACE_DIR = os.path.abspath(
os.path.join(os.path.dirname(__file__), os.path.pardir))
_CATAPULT_DIR = os.path.join(
os.path.dirname(os.path.abspath(__file__)), os.path.pardir, os.path.pardir)
_DEVIL_DIR = os.path.join(_CATAPULT_DIR, 'devil')
if _DEVIL_DIR not in sys.path:
sys.path.insert(0, _DEVIL_DIR)
if _SYSTRACE_DIR not in sys.path:
sys.path.insert(0, _SYSTRACE_DIR)
from devil import devil_env
from devil.android.sdk import adb_wrapper
from systrace import systrace_runner
from systrace import util
from systrace.tracing_agents import atrace_agent
from systrace.tracing_agents import atrace_from_file_agent
from systrace.tracing_agents import atrace_process_dump
from systrace.tracing_agents import ftrace_agent
from systrace.tracing_agents import walt_agent
ALL_MODULES = [atrace_agent, atrace_from_file_agent, atrace_process_dump,
ftrace_agent, walt_agent]
def parse_options(argv):
"""Parses and checks the command-line options.
Returns:
A tuple containing the options structure and a list of categories to
be traced.
"""
usage = 'Usage: %prog [options] [category1 [category2 ...]]'
desc = 'Example: %prog -b 32768 -t 15 gfx input view sched freq'
parser = optparse.OptionParser(usage=usage, description=desc,
conflict_handler='resolve')
parser = util.get_main_options(parser)
parser.add_option('-l', '--list-categories', dest='list_categories',
default=False, action='store_true',
help='list the available categories and exit')
# Add the other agent parsing options to the parser. For Systrace on the
# command line, all agents are added. For Android, only the compatible agents
# will be added.
for module in ALL_MODULES:
option_group = module.add_options(parser)
if option_group:
parser.add_option_group(option_group)
options, categories = parser.parse_args(argv[1:])
if options.output_file is None:
base = 'trace'
if options.from_file is not None:
base = os.path.splitext(options.from_file)[0]
suffix = '.json' if options.write_json else '.html'
options.output_file = base + suffix
if options.link_assets or options.asset_dir != 'trace-viewer':
parser.error('--link-assets and --asset-dir are deprecated.')
if options.trace_time and options.trace_time < 0:
parser.error('the trace time must be a non-negative number')
if (options.trace_buf_size is not None) and (options.trace_buf_size <= 0):
parser.error('the trace buffer size must be a positive number')
return (options, categories)
def find_adb():
"""Finds adb on the path.
This method is provided to avoid the issue of diskutils.spawn's
find_executable which first searches the current directory before
searching $PATH. That behavior results in issues where systrace.py
uses a different adb than the one in the path.
"""
paths = os.environ['PATH'].split(os.pathsep)
executable = 'adb'
if sys.platform == 'win32':
executable = executable + '.exe'
for p in paths:
f = os.path.join(p, executable)
if os.path.isfile(f):
return f
return None
def initialize_devil():
"""Initialize devil to use adb from $PATH"""
adb_path = find_adb()
if adb_path is None:
print >> sys.stderr, "Unable to find adb, is it in your path?"
sys.exit(1)
devil_dynamic_config = {
'config_type': 'BaseConfig',
'dependencies': {
'adb': {
'file_info': {
devil_env.GetPlatform(): {
'local_paths': [os.path.abspath(adb_path)]
}
}
}
}
}
devil_env.config.Initialize(configs=[devil_dynamic_config])
def main_impl(arguments):
# Parse the command line options.
options, categories = parse_options(arguments)
# Override --atrace-categories and --ftrace-categories flags if command-line
# categories are provided.
if categories:
if options.target == 'android':
options.atrace_categories = categories
elif options.target == 'linux':
options.ftrace_categories = categories
else:
raise RuntimeError('Categories are only valid for atrace/ftrace. Target '
'platform must be either Android or Linux.')
# Include atrace categories by default in Systrace.
if options.target == 'android' and not options.atrace_categories:
options.atrace_categories = atrace_agent.DEFAULT_CATEGORIES
if options.target == 'android' and not options.from_file:
initialize_devil()
devices = [a.GetDeviceSerial() for a in adb_wrapper.AdbWrapper.Devices()]
if not options.device_serial_number:
if len(devices) == 0:
raise RuntimeError('No ADB devices connected.')
elif len(devices) >= 2:
raise RuntimeError('Multiple devices connected, serial number required')
options.device_serial_number = devices[0]
elif options.device_serial_number not in devices:
raise RuntimeError('Device with the serial number "%s" is not connected.'
% options.device_serial_number)
# If list_categories is selected, just print the list of categories.
# In this case, use of the tracing controller is not necessary.
if options.list_categories:
if options.target == 'android':
atrace_agent.list_categories(options)
elif options.target == 'linux':
ftrace_agent.list_categories(options)
return
# Set up the systrace runner and start tracing.
controller = systrace_runner.SystraceRunner(
os.path.dirname(os.path.abspath(__file__)), options)
controller.StartTracing()
# Wait for the given number of seconds or until the user presses enter.
# pylint: disable=superfluous-parens
# (need the parens so no syntax error if trying to load with Python 3)
if options.from_file is not None:
print('Reading results from file.')
elif options.trace_time:
print('Starting tracing (%d seconds)' % options.trace_time)
time.sleep(options.trace_time)
else:
raw_input('Starting tracing (stop with enter)')
# Stop tracing and collect the output.
print('Tracing completed. Collecting output...')
controller.StopTracing()
print('Outputting Systrace results...')
controller.OutputSystraceResults(write_json=options.write_json)
def main():
main_impl(sys.argv)
if __name__ == '__main__' and __package__ is None:
main()
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