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 time 9 10 from adb_profile_chrome import controllers 11 12 from pylib import pexpect 13 14 _HEAP_PROFILE_MMAP_PROPERTY = 'heapprof.mmap' 15 16 class ChromeTracingController(controllers.BaseController): 17 def __init__(self, device, package_info, 18 categories, ring_buffer, trace_memory=False): 19 controllers.BaseController.__init__(self) 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_memory = trace_memory 27 self._trace_start_re = \ 28 re.compile(r'Logging performance trace to file') 29 self._trace_finish_re = \ 30 re.compile(r'Profiler finished[.] Results are in (.*)[.]') 31 self._device.old_interface.StartMonitoringLogcat(clear=False) 32 33 def __repr__(self): 34 return 'chrome trace' 35 36 @staticmethod 37 def GetCategories(device, package_info): 38 device.old_interface.BroadcastIntent( 39 package_info.package, 'GPU_PROFILER_LIST_CATEGORIES') 40 try: 41 json_category_list = device.old_interface.WaitForLogMatch( 42 re.compile(r'{"traceCategoriesList(.*)'), None, timeout=5).group(0) 43 except pexpect.TIMEOUT: 44 raise RuntimeError('Performance trace category list marker not found. ' 45 'Is the correct version of the browser running?') 46 47 record_categories = [] 48 disabled_by_default_categories = [] 49 json_data = json.loads(json_category_list)['traceCategoriesList'] 50 for item in json_data: 51 if item.startswith('disabled-by-default'): 52 disabled_by_default_categories.append(item) 53 else: 54 record_categories.append(item) 55 56 return record_categories, disabled_by_default_categories 57 58 def StartTracing(self, interval): 59 self._trace_interval = interval 60 self._device.old_interface.SyncLogCat() 61 self._device.old_interface.BroadcastIntent( 62 self._package_info.package, 'GPU_PROFILER_START', 63 '-e categories "%s"' % ','.join(self._categories), 64 '-e continuous' if self._ring_buffer else '') 65 66 if self._trace_memory: 67 self._device.old_interface.EnableAdbRoot() 68 self._device.old_interface.system_properties \ 69 [_HEAP_PROFILE_MMAP_PROPERTY] = 1 70 71 # Chrome logs two different messages related to tracing: 72 # 73 # 1. "Logging performance trace to file" 74 # 2. "Profiler finished. Results are in [...]" 75 # 76 # The first one is printed when tracing starts and the second one indicates 77 # that the trace file is ready to be pulled. 78 try: 79 self._device.old_interface.WaitForLogMatch( 80 self._trace_start_re, None, timeout=5) 81 except pexpect.TIMEOUT: 82 raise RuntimeError('Trace start marker not found. Is the correct version ' 83 'of the browser running?') 84 85 def StopTracing(self): 86 self._device.old_interface.BroadcastIntent( 87 self._package_info.package, 88 'GPU_PROFILER_STOP') 89 self._trace_file = self._device.old_interface.WaitForLogMatch( 90 self._trace_finish_re, None, timeout=120).group(1) 91 if self._trace_memory: 92 self._device.old_interface.system_properties \ 93 [_HEAP_PROFILE_MMAP_PROPERTY] = 0 94 95 def PullTrace(self): 96 # Wait a bit for the browser to finish writing the trace file. 97 time.sleep(self._trace_interval / 4 + 1) 98 99 trace_file = self._trace_file.replace('/storage/emulated/0/', '/sdcard/') 100 host_file = os.path.join(os.path.curdir, os.path.basename(trace_file)) 101 self._device.old_interface.PullFileFromDevice(trace_file, host_file) 102 return host_file 103
