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| 1 # Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 # Use of this source code is governed by a BSD-style license that can be |
| 3 # found in the LICENSE file. |
| 4 |
| 5 import json |
| 6 import os |
| 7 import re |
| 8 import threading |
| 9 import time |
| 10 import zlib |
| 11 |
| 12 from chrome_profiler import util |
| 13 |
| 14 from pylib import cmd_helper |
| 15 from pylib import pexpect |
| 16 |
| 17 |
| 18 class ChromeTracingController(object): |
| 19 def __init__(self, device, package_info, categories, ring_buffer): |
| 20 self._device = device |
| 21 self._package_info = package_info |
| 22 self._categories = categories |
| 23 self._ring_buffer = ring_buffer |
| 24 self._trace_file = None |
| 25 self._trace_interval = None |
| 26 self._trace_start_re = \ |
| 27 re.compile(r'Logging performance trace to file') |
| 28 self._trace_finish_re = \ |
| 29 re.compile(r'Profiler finished[.] Results are in (.*)[.]') |
| 30 self._device.old_interface.StartMonitoringLogcat(clear=False) |
| 31 |
| 32 def __repr__(self): |
| 33 return 'chrome trace' |
| 34 |
| 35 @staticmethod |
| 36 def GetCategories(device, package_info): |
| 37 device.old_interface.BroadcastIntent( |
| 38 package_info.package, 'GPU_PROFILER_LIST_CATEGORIES') |
| 39 try: |
| 40 json_category_list = device.old_interface.WaitForLogMatch( |
| 41 re.compile(r'{"traceCategoriesList(.*)'), None, timeout=5).group(0) |
| 42 except pexpect.TIMEOUT: |
| 43 raise RuntimeError('Performance trace category list marker not found. ' |
| 44 'Is the correct version of the browser running?') |
| 45 |
| 46 record_categories = [] |
| 47 disabled_by_default_categories = [] |
| 48 json_data = json.loads(json_category_list)['traceCategoriesList'] |
| 49 for item in json_data: |
| 50 if item.startswith('disabled-by-default'): |
| 51 disabled_by_default_categories.append(item) |
| 52 else: |
| 53 record_categories.append(item) |
| 54 |
| 55 return record_categories, disabled_by_default_categories |
| 56 |
| 57 def StartTracing(self, interval): |
| 58 self._trace_interval = interval |
| 59 self._device.old_interface.SyncLogCat() |
| 60 self._device.old_interface.BroadcastIntent( |
| 61 self._package_info.package, 'GPU_PROFILER_START', |
| 62 '-e categories "%s"' % ','.join(self._categories), |
| 63 '-e continuous' if self._ring_buffer else '') |
| 64 # Chrome logs two different messages related to tracing: |
| 65 # |
| 66 # 1. "Logging performance trace to file" |
| 67 # 2. "Profiler finished. Results are in [...]" |
| 68 # |
| 69 # The first one is printed when tracing starts and the second one indicates |
| 70 # that the trace file is ready to be pulled. |
| 71 try: |
| 72 self._device.old_interface.WaitForLogMatch( |
| 73 self._trace_start_re, None, timeout=5) |
| 74 except pexpect.TIMEOUT: |
| 75 raise RuntimeError('Trace start marker not found. Is the correct version ' |
| 76 'of the browser running?') |
| 77 |
| 78 def StopTracing(self): |
| 79 self._device.old_interface.BroadcastIntent( |
| 80 self._package_info.package, |
| 81 'GPU_PROFILER_STOP') |
| 82 self._trace_file = self._device.old_interface.WaitForLogMatch( |
| 83 self._trace_finish_re, None, timeout=120).group(1) |
| 84 |
| 85 def PullTrace(self): |
| 86 # Wait a bit for the browser to finish writing the trace file. |
| 87 time.sleep(self._trace_interval / 4 + 1) |
| 88 |
| 89 trace_file = self._trace_file.replace('/storage/emulated/0/', '/sdcard/') |
| 90 host_file = os.path.join(os.path.curdir, os.path.basename(trace_file)) |
| 91 self._device.old_interface.PullFileFromDevice(trace_file, host_file) |
| 92 return host_file |
| 93 |
| 94 |
| 95 _SYSTRACE_OPTIONS = [ |
| 96 # Compress the trace before sending it over USB. |
| 97 '-z', |
| 98 # Use a large trace buffer to increase the polling interval. |
| 99 '-b', '16384' |
| 100 ] |
| 101 |
| 102 # Interval in seconds for sampling systrace data. |
| 103 _SYSTRACE_INTERVAL = 15 |
| 104 |
| 105 |
| 106 class SystraceController(object): |
| 107 def __init__(self, device, categories, ring_buffer): |
| 108 self._device = device |
| 109 self._categories = categories |
| 110 self._ring_buffer = ring_buffer |
| 111 self._done = threading.Event() |
| 112 self._thread = None |
| 113 self._trace_data = None |
| 114 |
| 115 def __repr__(self): |
| 116 return 'systrace' |
| 117 |
| 118 @staticmethod |
| 119 def GetCategories(device): |
| 120 return device.old_interface.RunShellCommand('atrace --list_categories') |
| 121 |
| 122 def StartTracing(self, _): |
| 123 self._thread = threading.Thread(target=self._CollectData) |
| 124 self._thread.start() |
| 125 |
| 126 def StopTracing(self): |
| 127 self._done.set() |
| 128 |
| 129 def PullTrace(self): |
| 130 self._thread.join() |
| 131 self._thread = None |
| 132 if self._trace_data: |
| 133 output_name = 'systrace-%s' % util.GetTraceTimestamp() |
| 134 with open(output_name, 'w') as out: |
| 135 out.write(self._trace_data) |
| 136 return output_name |
| 137 |
| 138 def _RunATraceCommand(self, command): |
| 139 # TODO(jbudorick) can this be made work with DeviceUtils? |
| 140 # We use a separate interface to adb because the one from AndroidCommands |
| 141 # isn't re-entrant. |
| 142 device_param = (['-s', self._device.old_interface.GetDevice()] |
| 143 if self._device.old_interface.GetDevice() else []) |
| 144 cmd = ['adb'] + device_param + ['shell', 'atrace', '--%s' % command] + \ |
| 145 _SYSTRACE_OPTIONS + self._categories |
| 146 return cmd_helper.GetCmdOutput(cmd) |
| 147 |
| 148 def _CollectData(self): |
| 149 trace_data = [] |
| 150 self._RunATraceCommand('async_start') |
| 151 try: |
| 152 while not self._done.is_set(): |
| 153 self._done.wait(_SYSTRACE_INTERVAL) |
| 154 if not self._ring_buffer or self._done.is_set(): |
| 155 trace_data.append( |
| 156 self._DecodeTraceData(self._RunATraceCommand('async_dump'))) |
| 157 finally: |
| 158 trace_data.append( |
| 159 self._DecodeTraceData(self._RunATraceCommand('async_stop'))) |
| 160 self._trace_data = ''.join([zlib.decompress(d) for d in trace_data]) |
| 161 |
| 162 @staticmethod |
| 163 def _DecodeTraceData(trace_data): |
| 164 try: |
| 165 trace_start = trace_data.index('TRACE:') |
| 166 except ValueError: |
| 167 raise RuntimeError('Systrace start marker not found') |
| 168 trace_data = trace_data[trace_start + 6:] |
| 169 |
| 170 # Collapse CRLFs that are added by adb shell. |
| 171 if trace_data.startswith('\r\n'): |
| 172 trace_data = trace_data.replace('\r\n', '\n') |
| 173 |
| 174 # Skip the initial newline. |
| 175 return trace_data[1:] |
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