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 profile_chrome import controllers 11 12 from pylib import pexpect 13 from pylib.device import intent 14 15 16 _HEAP_PROFILE_MMAP_PROPERTY = 'heapprof.mmap' 17 18 class ChromeTracingController(controllers.BaseController): 19 def __init__(self, device, package_info, 20 categories, ring_buffer, trace_memory=False): 21 controllers.BaseController.__init__(self) 22 self._device = device 23 self._package_info = package_info 24 self._categories = categories 25 self._ring_buffer = ring_buffer 26 self._trace_file = None 27 self._trace_interval = None 28 self._trace_memory = trace_memory 29 self._is_tracing = False 30 self._trace_start_re = \ 31 re.compile(r'Logging performance trace to file') 32 self._trace_finish_re = \ 33 re.compile(r'Profiler finished[.] Results are in (.*)[.]') 34 self._device.old_interface.StartMonitoringLogcat(clear=False) 35 36 def __repr__(self): 37 return 'chrome trace' 38 39 @staticmethod 40 def GetCategories(device, package_info): 41 device.BroadcastIntent(intent.Intent( 42 action='%s.GPU_PROFILER_LIST_CATEGORIES' % package_info.package)) 43 try: 44 json_category_list = device.old_interface.WaitForLogMatch( 45 re.compile(r'{"traceCategoriesList(.*)'), None, timeout=5).group(0) 46 except pexpect.TIMEOUT: 47 raise RuntimeError('Performance trace category list marker not found. ' 48 'Is the correct version of the browser running?') 49 50 record_categories = [] 51 disabled_by_default_categories = [] 52 json_data = json.loads(json_category_list)['traceCategoriesList'] 53 for item in json_data: 54 if item.startswith('disabled-by-default'): 55 disabled_by_default_categories.append(item) 56 else: 57 record_categories.append(item) 58 59 return record_categories, disabled_by_default_categories 60 61 def StartTracing(self, interval): 62 self._trace_interval = interval 63 self._device.old_interface.SyncLogCat() 64 start_extras = {'categories': ','.join(self._categories)} 65 if self._ring_buffer: 66 start_extras['continuous'] = None 67 self._device.BroadcastIntent(intent.Intent( 68 action='%s.GPU_PROFILER_START' % self._package_info.package, 69 extras=start_extras)) 70 71 if self._trace_memory: 72 self._device.old_interface.EnableAdbRoot() 73 self._device.SetProp(_HEAP_PROFILE_MMAP_PROPERTY, 1) 74 75 # Chrome logs two different messages related to tracing: 76 # 77 # 1. "Logging performance trace to file" 78 # 2. "Profiler finished. Results are in [...]" 79 # 80 # The first one is printed when tracing starts and the second one indicates 81 # that the trace file is ready to be pulled. 82 try: 83 self._device.old_interface.WaitForLogMatch( 84 self._trace_start_re, None, timeout=5) 85 self._is_tracing = True 86 except pexpect.TIMEOUT: 87 raise RuntimeError('Trace start marker not found. Is the correct version ' 88 'of the browser running?') 89 90 def StopTracing(self): 91 if self._is_tracing: 92 self._device.BroadcastIntent(intent.Intent( 93 action='%s.GPU_PROFILER_STOP' % self._package_info.package)) 94 self._trace_file = self._device.old_interface.WaitForLogMatch( 95 self._trace_finish_re, None, timeout=120).group(1) 96 self._is_tracing = False 97 if self._trace_memory: 98 self._device.SetProp(_HEAP_PROFILE_MMAP_PROPERTY, 0) 99 100 def PullTrace(self): 101 # Wait a bit for the browser to finish writing the trace file. 102 time.sleep(self._trace_interval / 4 + 1) 103 104 trace_file = self._trace_file.replace('/storage/emulated/0/', '/sdcard/') 105 host_file = os.path.join(os.path.curdir, os.path.basename(trace_file)) 106 self._device.PullFile(trace_file, host_file) 107 return host_file 108
