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| 1 // Copyright (c) 2012 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 #include "base/debug/trace_event_impl.h" | |
| 6 | |
| 7 #include <fcntl.h> | |
| 8 | |
| 9 #include "base/debug/trace_event.h" | |
| 10 #include "base/format_macros.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/strings/stringprintf.h" | |
| 13 #include "base/synchronization/waitable_event.h" | |
| 14 | |
| 15 namespace { | |
| 16 | |
| 17 int g_atrace_fd = -1; | |
| 18 const char kATraceMarkerFile[] = "/sys/kernel/debug/tracing/trace_marker"; | |
| 19 | |
| 20 void WriteEvent( | |
| 21 char phase, | |
| 22 const char* category_group, | |
| 23 const char* name, | |
| 24 unsigned long long id, | |
| 25 const char** arg_names, | |
| 26 const unsigned char* arg_types, | |
| 27 const base::debug::TraceEvent::TraceValue* arg_values, | |
| 28 const scoped_refptr<base::debug::ConvertableToTraceFormat>* | |
| 29 convertable_values, | |
| 30 unsigned char flags) { | |
| 31 std::string out = base::StringPrintf("%c|%d|%s", phase, getpid(), name); | |
| 32 if (flags & TRACE_EVENT_FLAG_HAS_ID) | |
| 33 base::StringAppendF(&out, "-%" PRIx64, static_cast<uint64>(id)); | |
| 34 out += '|'; | |
| 35 | |
| 36 for (int i = 0; i < base::debug::kTraceMaxNumArgs && arg_names[i]; ++i) { | |
| 37 if (i) | |
| 38 out += ';'; | |
| 39 out += arg_names[i]; | |
| 40 out += '='; | |
| 41 std::string::size_type value_start = out.length(); | |
| 42 if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) { | |
| 43 convertable_values[i]->AppendAsTraceFormat(&out); | |
| 44 } else { | |
| 45 base::debug::TraceEvent::AppendValueAsJSON( | |
| 46 arg_types[i], arg_values[i], &out); | |
| 47 } | |
| 48 // Remove the quotes which may confuse the atrace script. | |
| 49 ReplaceSubstringsAfterOffset(&out, value_start, "\\\"", "'"); | |
| 50 ReplaceSubstringsAfterOffset(&out, value_start, "\"", ""); | |
| 51 // Replace chars used for separators with similar chars in the value. | |
| 52 std::replace(out.begin() + value_start, out.end(), ';', ','); | |
| 53 std::replace(out.begin() + value_start, out.end(), '|', '!'); | |
| 54 } | |
| 55 | |
| 56 out += '|'; | |
| 57 out += category_group; | |
| 58 write(g_atrace_fd, out.c_str(), out.size()); | |
| 59 } | |
| 60 | |
| 61 void NoOpOutputCallback(base::WaitableEvent* complete_event, | |
| 62 const scoped_refptr<base::RefCountedString>&, | |
| 63 bool has_more_events) { | |
| 64 if (!has_more_events) | |
| 65 complete_event->Signal(); | |
| 66 } | |
| 67 | |
| 68 void EndChromeTracing(base::debug::TraceLog* trace_log, | |
| 69 base::WaitableEvent* complete_event) { | |
| 70 trace_log->SetDisabled(); | |
| 71 // Delete the buffered trace events as they have been sent to atrace. | |
| 72 trace_log->Flush(base::Bind(&NoOpOutputCallback, complete_event)); | |
| 73 } | |
| 74 | |
| 75 } // namespace | |
| 76 | |
| 77 namespace base { | |
| 78 namespace debug { | |
| 79 | |
| 80 // These functions support Android systrace.py when 'webview' category is | |
| 81 // traced. With the new adb_profile_chrome, we may have two phases: | |
| 82 // - before WebView is ready for combined tracing, we can use adb_profile_chrome | |
| 83 // to trace android categories other than 'webview' and chromium categories. | |
| 84 // In this way we can avoid the conflict between StartATrace/StopATrace and | |
| 85 // the intents. | |
| 86 // - TODO(wangxianzhu): after WebView is ready for combined tracing, remove | |
| 87 // StartATrace, StopATrace and SendToATrace, and perhaps send Java traces | |
| 88 // directly to atrace in trace_event_binding.cc. | |
| 89 | |
| 90 void TraceLog::StartATrace() { | |
| 91 if (g_atrace_fd != -1) | |
| 92 return; | |
| 93 | |
| 94 g_atrace_fd = open(kATraceMarkerFile, O_WRONLY); | |
| 95 if (g_atrace_fd == -1) { | |
| 96 PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile; | |
| 97 return; | |
| 98 } | |
| 99 SetEnabled(CategoryFilter(CategoryFilter::kDefaultCategoryFilterString), | |
| 100 TraceLog::RECORDING_MODE, | |
| 101 TraceOptions(RECORD_CONTINUOUSLY)); | |
| 102 } | |
| 103 | |
| 104 void TraceLog::StopATrace() { | |
| 105 if (g_atrace_fd == -1) | |
| 106 return; | |
| 107 | |
| 108 close(g_atrace_fd); | |
| 109 g_atrace_fd = -1; | |
| 110 | |
| 111 // TraceLog::Flush() requires the current thread to have a message loop, but | |
| 112 // this thread called from Java may not have one, so flush in another thread. | |
| 113 Thread end_chrome_tracing_thread("end_chrome_tracing"); | |
| 114 WaitableEvent complete_event(false, false); | |
| 115 end_chrome_tracing_thread.Start(); | |
| 116 end_chrome_tracing_thread.message_loop()->PostTask( | |
| 117 FROM_HERE, base::Bind(&EndChromeTracing, Unretained(this), | |
| 118 Unretained(&complete_event))); | |
| 119 complete_event.Wait(); | |
| 120 } | |
| 121 | |
| 122 void TraceEvent::SendToATrace() { | |
| 123 if (g_atrace_fd == -1) | |
| 124 return; | |
| 125 | |
| 126 const char* category_group = | |
| 127 TraceLog::GetCategoryGroupName(category_group_enabled_); | |
| 128 | |
| 129 switch (phase_) { | |
| 130 case TRACE_EVENT_PHASE_BEGIN: | |
| 131 WriteEvent('B', category_group, name_, id_, | |
| 132 arg_names_, arg_types_, arg_values_, convertable_values_, | |
| 133 flags_); | |
| 134 break; | |
| 135 | |
| 136 case TRACE_EVENT_PHASE_COMPLETE: | |
| 137 WriteEvent(duration_.ToInternalValue() == -1 ? 'B' : 'E', | |
| 138 category_group, name_, id_, | |
| 139 arg_names_, arg_types_, arg_values_, convertable_values_, | |
| 140 flags_); | |
| 141 break; | |
| 142 | |
| 143 case TRACE_EVENT_PHASE_END: | |
| 144 // Though a single 'E' is enough, here append pid, name and | |
| 145 // category_group etc. So that unpaired events can be found easily. | |
| 146 WriteEvent('E', category_group, name_, id_, | |
| 147 arg_names_, arg_types_, arg_values_, convertable_values_, | |
| 148 flags_); | |
| 149 break; | |
| 150 | |
| 151 case TRACE_EVENT_PHASE_INSTANT: | |
| 152 // Simulate an instance event with a pair of begin/end events. | |
| 153 WriteEvent('B', category_group, name_, id_, | |
| 154 arg_names_, arg_types_, arg_values_, convertable_values_, | |
| 155 flags_); | |
| 156 write(g_atrace_fd, "E", 1); | |
| 157 break; | |
| 158 | |
| 159 case TRACE_EVENT_PHASE_COUNTER: | |
| 160 for (int i = 0; i < kTraceMaxNumArgs && arg_names_[i]; ++i) { | |
| 161 DCHECK(arg_types_[i] == TRACE_VALUE_TYPE_INT); | |
| 162 std::string out = base::StringPrintf( | |
| 163 "C|%d|%s-%s", getpid(), name_, arg_names_[i]); | |
| 164 if (flags_ & TRACE_EVENT_FLAG_HAS_ID) | |
| 165 StringAppendF(&out, "-%" PRIx64, static_cast<uint64>(id_)); | |
| 166 StringAppendF(&out, "|%d|%s", | |
| 167 static_cast<int>(arg_values_[i].as_int), category_group); | |
| 168 write(g_atrace_fd, out.c_str(), out.size()); | |
| 169 } | |
| 170 break; | |
| 171 | |
| 172 default: | |
| 173 // Do nothing. | |
| 174 break; | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 void TraceLog::AddClockSyncMetadataEvent() { | |
| 179 int atrace_fd = open(kATraceMarkerFile, O_WRONLY | O_APPEND); | |
| 180 if (atrace_fd == -1) { | |
| 181 PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile; | |
| 182 return; | |
| 183 } | |
| 184 | |
| 185 // Android's kernel trace system has a trace_marker feature: this is a file on | |
| 186 // debugfs that takes the written data and pushes it onto the trace | |
| 187 // buffer. So, to establish clock sync, we write our monotonic clock into that | |
| 188 // trace buffer. | |
| 189 TimeTicks now = TimeTicks::NowFromSystemTraceTime(); | |
| 190 double now_in_seconds = now.ToInternalValue() / 1000000.0; | |
| 191 std::string marker = StringPrintf( | |
| 192 "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds); | |
| 193 if (write(atrace_fd, marker.c_str(), marker.size()) == -1) | |
| 194 PLOG(WARNING) << "Couldn't write to " << kATraceMarkerFile; | |
| 195 close(atrace_fd); | |
| 196 } | |
| 197 | |
| 198 } // namespace debug | |
| 199 } // namespace base | |
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Chromium Code Reviews
Issue 885443002:
Roll Chrome into Mojo. (Closed)
Base URL: https://github.com/domokit/mojo.git@master