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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/tracing/common/trace_startup.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/trace_log.h"
#include "components/tracing/common/trace_config_file.h"
#include "components/tracing/common/trace_to_console.h"
#include "components/tracing/common/tracing_switches.h"
namespace tracing {
void EnableStartupTracingIfNeeded(bool can_access_file_system) {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
// Enables heap profiling if "--enable-heap-profiling" flag is passed.
base::trace_event::MemoryDumpManager::GetInstance()
->EnableHeapProfilingIfNeeded();
if (command_line.HasSwitch(switches::kTraceStartup)) {
base::trace_event::TraceConfig trace_config(
command_line.GetSwitchValueASCII(switches::kTraceStartup),
base::trace_event::RECORD_UNTIL_FULL);
base::trace_event::TraceLog::GetInstance()->SetEnabled(
trace_config, base::trace_event::TraceLog::RECORDING_MODE);
} else if (command_line.HasSwitch(switches::kTraceToConsole)) {
base::trace_event::TraceConfig trace_config =
tracing::GetConfigForTraceToConsole();
LOG(ERROR) << "Start " << switches::kTraceToConsole
<< " with CategoryFilter '"
<< trace_config.ToCategoryFilterString() << "'.";
base::trace_event::TraceLog::GetInstance()->SetEnabled(
trace_config, base::trace_event::TraceLog::RECORDING_MODE);
} else if (can_access_file_system &&
tracing::TraceConfigFile::GetInstance()->IsEnabled()) {
// This checks kTraceConfigFile switch.
base::trace_event::TraceLog::GetInstance()->SetEnabled(
tracing::TraceConfigFile::GetInstance()->GetTraceConfig(),
base::trace_event::TraceLog::RECORDING_MODE);
}
}
} // namespace tracing
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