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ipc/chromium/src/base/trace_event.cc@6474c204b198 (annotated)

ipc/chromium/src/base/trace_event.cc

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
michael@0 2 // Use of this source code is governed by a BSD-style license that can be
michael@0 3 // found in the LICENSE file.
michael@0 4
michael@0 5 #include "base/trace_event.h"
michael@0 6
michael@0 7 #include "base/file_path.h"
michael@0 8 #include "base/file_util.h"
michael@0 9 #include "base/path_service.h"
michael@0 10 #include "base/platform_thread.h"
michael@0 11 #include "base/process_util.h"
michael@0 12 #include "base/string_util.h"
michael@0 13 #include "base/time.h"
michael@0 14
michael@0 15 #define USE_UNRELIABLE_NOW
michael@0 16
michael@0 17 namespace base {
michael@0 18
michael@0 19 static const char* kEventTypeNames[] = {
michael@0 20 "BEGIN",
michael@0 21 "END",
michael@0 22 "INSTANT"
michael@0 23 };
michael@0 24
michael@0 25 static const FilePath::CharType* kLogFileName =
michael@0 26 FILE_PATH_LITERAL("trace_%d.log");
michael@0 27
michael@0 28 TraceLog::TraceLog() : enabled_(false), log_file_(NULL) {
michael@0 29 base::ProcessHandle proc = base::GetCurrentProcessHandle();
michael@0 30 process_metrics_.reset(base::ProcessMetrics::CreateProcessMetrics(proc));
michael@0 31 }
michael@0 32
michael@0 33 TraceLog::~TraceLog() {
michael@0 34 Stop();
michael@0 35 }
michael@0 36
michael@0 37 // static
michael@0 38 bool TraceLog::IsTracing() {
michael@0 39 TraceLog* trace = Singleton<TraceLog>::get();
michael@0 40 return trace->enabled_;
michael@0 41 }
michael@0 42
michael@0 43 // static
michael@0 44 bool TraceLog::StartTracing() {
michael@0 45 TraceLog* trace = Singleton<TraceLog>::get();
michael@0 46 return trace->Start();
michael@0 47 }
michael@0 48
michael@0 49 bool TraceLog::Start() {
michael@0 50 if (enabled_)
michael@0 51 return true;
michael@0 52 enabled_ = OpenLogFile();
michael@0 53 if (enabled_) {
michael@0 54 Log("var raw_trace_events = [\n");
michael@0 55 trace_start_time_ = TimeTicks::Now();
michael@0 56 timer_.Start(TimeDelta::FromMilliseconds(250), this, &TraceLog::Heartbeat);
michael@0 57 }
michael@0 58 return enabled_;
michael@0 59 }
michael@0 60
michael@0 61 // static
michael@0 62 void TraceLog::StopTracing() {
michael@0 63 TraceLog* trace = Singleton<TraceLog>::get();
michael@0 64 return trace->Stop();
michael@0 65 }
michael@0 66
michael@0 67 void TraceLog::Stop() {
michael@0 68 if (enabled_) {
michael@0 69 enabled_ = false;
michael@0 70 Log("];\n");
michael@0 71 CloseLogFile();
michael@0 72 timer_.Stop();
michael@0 73 }
michael@0 74 }
michael@0 75
michael@0 76 void TraceLog::Heartbeat() {
michael@0 77 std::string cpu = StringPrintf("%d", process_metrics_->GetCPUUsage());
michael@0 78 TRACE_EVENT_INSTANT("heartbeat.cpu", 0, cpu);
michael@0 79 }
michael@0 80
michael@0 81 void TraceLog::CloseLogFile() {
michael@0 82 if (log_file_) {
michael@0 83 file_util::CloseFile(log_file_);
michael@0 84 }
michael@0 85 }
michael@0 86
michael@0 87 bool TraceLog::OpenLogFile() {
michael@0 88 FilePath::StringType pid_filename =
michael@0 89 StringPrintf(kLogFileName, base::GetCurrentProcId());
michael@0 90 FilePath log_file_path;
michael@0 91 if (!PathService::Get(base::DIR_EXE, &log_file_path))
michael@0 92 return false;
michael@0 93 log_file_path = log_file_path.Append(pid_filename);
michael@0 94 log_file_ = file_util::OpenFile(log_file_path, "a");
michael@0 95 if (!log_file_) {
michael@0 96 // try the current directory
michael@0 97 log_file_ = file_util::OpenFile(FilePath(pid_filename), "a");
michael@0 98 if (!log_file_) {
michael@0 99 return false;
michael@0 100 }
michael@0 101 }
michael@0 102 return true;
michael@0 103 }
michael@0 104
michael@0 105 void TraceLog::Trace(const std::string& name,
michael@0 106 EventType type,
michael@0 107 const void* id,
michael@0 108 const std::wstring& extra,
michael@0 109 const char* file,
michael@0 110 int line) {
michael@0 111 if (!enabled_)
michael@0 112 return;
michael@0 113 Trace(name, type, id, WideToUTF8(extra), file, line);
michael@0 114 }
michael@0 115
michael@0 116 void TraceLog::Trace(const std::string& name,
michael@0 117 EventType type,
michael@0 118 const void* id,
michael@0 119 const std::string& extra,
michael@0 120 const char* file,
michael@0 121 int line) {
michael@0 122 if (!enabled_)
michael@0 123 return;
michael@0 124
michael@0 125 #ifdef USE_UNRELIABLE_NOW
michael@0 126 TimeTicks tick = TimeTicks::HighResNow();
michael@0 127 #else
michael@0 128 TimeTicks tick = TimeTicks::Now();
michael@0 129 #endif
michael@0 130 TimeDelta delta = tick - trace_start_time_;
michael@0 131 int64_t usec = delta.InMicroseconds();
michael@0 132 std::string msg =
michael@0 133 StringPrintf("{'pid':'0x%lx', 'tid':'0x%lx', 'type':'%s', "
michael@0 134 "'name':'%s', 'id':'0x%lx', 'extra':'%s', 'file':'%s', "
michael@0 135 "'line_number':'%d', 'usec_begin': %I64d},\n",
michael@0 136 base::GetCurrentProcId(),
michael@0 137 PlatformThread::CurrentId(),
michael@0 138 kEventTypeNames[type],
michael@0 139 name.c_str(),
michael@0 140 id,
michael@0 141 extra.c_str(),
michael@0 142 file,
michael@0 143 line,
michael@0 144 usec);
michael@0 145
michael@0 146 Log(msg);
michael@0 147 }
michael@0 148
michael@0 149 void TraceLog::Log(const std::string& msg) {
michael@0 150 AutoLock lock(file_lock_);
michael@0 151
michael@0 152 fprintf(log_file_, "%s", msg.c_str());
michael@0 153 }
michael@0 154
michael@0 155 } // namespace base

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