1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/base/trace_event.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,155 @@
1.4 +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "base/trace_event.h"
1.9 +
1.10 +#include "base/file_path.h"
1.11 +#include "base/file_util.h"
1.12 +#include "base/path_service.h"
1.13 +#include "base/platform_thread.h"
1.14 +#include "base/process_util.h"
1.15 +#include "base/string_util.h"
1.16 +#include "base/time.h"
1.17 +
1.18 +#define USE_UNRELIABLE_NOW
1.19 +
1.20 +namespace base {
1.21 +
1.22 +static const char* kEventTypeNames[] = {
1.23 + "BEGIN",
1.24 + "END",
1.25 + "INSTANT"
1.26 +};
1.27 +
1.28 +static const FilePath::CharType* kLogFileName =
1.29 + FILE_PATH_LITERAL("trace_%d.log");
1.30 +
1.31 +TraceLog::TraceLog() : enabled_(false), log_file_(NULL) {
1.32 + base::ProcessHandle proc = base::GetCurrentProcessHandle();
1.33 + process_metrics_.reset(base::ProcessMetrics::CreateProcessMetrics(proc));
1.34 +}
1.35 +
1.36 +TraceLog::~TraceLog() {
1.37 + Stop();
1.38 +}
1.39 +
1.40 +// static
1.41 +bool TraceLog::IsTracing() {
1.42 + TraceLog* trace = Singleton<TraceLog>::get();
1.43 + return trace->enabled_;
1.44 +}
1.45 +
1.46 +// static
1.47 +bool TraceLog::StartTracing() {
1.48 + TraceLog* trace = Singleton<TraceLog>::get();
1.49 + return trace->Start();
1.50 +}
1.51 +
1.52 +bool TraceLog::Start() {
1.53 + if (enabled_)
1.54 + return true;
1.55 + enabled_ = OpenLogFile();
1.56 + if (enabled_) {
1.57 + Log("var raw_trace_events = [\n");
1.58 + trace_start_time_ = TimeTicks::Now();
1.59 + timer_.Start(TimeDelta::FromMilliseconds(250), this, &TraceLog::Heartbeat);
1.60 + }
1.61 + return enabled_;
1.62 +}
1.63 +
1.64 +// static
1.65 +void TraceLog::StopTracing() {
1.66 + TraceLog* trace = Singleton<TraceLog>::get();
1.67 + return trace->Stop();
1.68 +}
1.69 +
1.70 +void TraceLog::Stop() {
1.71 + if (enabled_) {
1.72 + enabled_ = false;
1.73 + Log("];\n");
1.74 + CloseLogFile();
1.75 + timer_.Stop();
1.76 + }
1.77 +}
1.78 +
1.79 +void TraceLog::Heartbeat() {
1.80 + std::string cpu = StringPrintf("%d", process_metrics_->GetCPUUsage());
1.81 + TRACE_EVENT_INSTANT("heartbeat.cpu", 0, cpu);
1.82 +}
1.83 +
1.84 +void TraceLog::CloseLogFile() {
1.85 + if (log_file_) {
1.86 + file_util::CloseFile(log_file_);
1.87 + }
1.88 +}
1.89 +
1.90 +bool TraceLog::OpenLogFile() {
1.91 + FilePath::StringType pid_filename =
1.92 + StringPrintf(kLogFileName, base::GetCurrentProcId());
1.93 + FilePath log_file_path;
1.94 + if (!PathService::Get(base::DIR_EXE, &log_file_path))
1.95 + return false;
1.96 + log_file_path = log_file_path.Append(pid_filename);
1.97 + log_file_ = file_util::OpenFile(log_file_path, "a");
1.98 + if (!log_file_) {
1.99 + // try the current directory
1.100 + log_file_ = file_util::OpenFile(FilePath(pid_filename), "a");
1.101 + if (!log_file_) {
1.102 + return false;
1.103 + }
1.104 + }
1.105 + return true;
1.106 +}
1.107 +
1.108 +void TraceLog::Trace(const std::string& name,
1.109 + EventType type,
1.110 + const void* id,
1.111 + const std::wstring& extra,
1.112 + const char* file,
1.113 + int line) {
1.114 + if (!enabled_)
1.115 + return;
1.116 + Trace(name, type, id, WideToUTF8(extra), file, line);
1.117 +}
1.118 +
1.119 +void TraceLog::Trace(const std::string& name,
1.120 + EventType type,
1.121 + const void* id,
1.122 + const std::string& extra,
1.123 + const char* file,
1.124 + int line) {
1.125 + if (!enabled_)
1.126 + return;
1.127 +
1.128 +#ifdef USE_UNRELIABLE_NOW
1.129 + TimeTicks tick = TimeTicks::HighResNow();
1.130 +#else
1.131 + TimeTicks tick = TimeTicks::Now();
1.132 +#endif
1.133 + TimeDelta delta = tick - trace_start_time_;
1.134 + int64_t usec = delta.InMicroseconds();
1.135 + std::string msg =
1.136 + StringPrintf("{'pid':'0x%lx', 'tid':'0x%lx', 'type':'%s', "
1.137 + "'name':'%s', 'id':'0x%lx', 'extra':'%s', 'file':'%s', "
1.138 + "'line_number':'%d', 'usec_begin': %I64d},\n",
1.139 + base::GetCurrentProcId(),
1.140 + PlatformThread::CurrentId(),
1.141 + kEventTypeNames[type],
1.142 + name.c_str(),
1.143 + id,
1.144 + extra.c_str(),
1.145 + file,
1.146 + line,
1.147 + usec);
1.148 +
1.149 + Log(msg);
1.150 +}
1.151 +
1.152 +void TraceLog::Log(const std::string& msg) {
1.153 + AutoLock lock(file_lock_);
1.154 +
1.155 + fprintf(log_file_, "%s", msg.c_str());
1.156 +}
1.157 +
1.158 +} // namespace base
