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// Copyright (c) 2013 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.
#ifndef TOOLS_GN_TRACE_H_
#define TOOLS_GN_TRACE_H_
#include <string>
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
class Label;
class TraceItem {
public:
enum Type {
TRACE_FILE_LOAD,
TRACE_FILE_PARSE,
TRACE_FILE_EXECUTE,
TRACE_FILE_WRITE,
TRACE_SCRIPT_EXECUTE,
TRACE_DEFINE_TARGET,
TRACE_CHECK_HEADER, // One file.
TRACE_CHECK_HEADERS, // All files.
};
TraceItem(Type type,
const std::string& name,
base::PlatformThreadId thread_id);
~TraceItem();
Type type() const { return type_; }
const std::string& name() const { return name_; }
base::PlatformThreadId thread_id() const { return thread_id_; }
base::TimeTicks begin() const { return begin_; }
void set_begin(base::TimeTicks b) { begin_ = b; }
base::TimeTicks end() const { return end_; }
void set_end(base::TimeTicks e) { end_ = e; }
base::TimeDelta delta() const { return end_ - begin_; }
// Optional toolchain label.
const std::string& toolchain() const { return toolchain_; }
void set_toolchain(const std::string& t) { toolchain_ = t; }
// Optional command line.
const std::string& cmdline() const { return cmdline_; }
void set_cmdline(const std::string& c) { cmdline_ = c; }
private:
Type type_;
std::string name_;
base::PlatformThreadId thread_id_;
base::TimeTicks begin_;
base::TimeTicks end_;
std::string toolchain_;
std::string cmdline_;
};
class ScopedTrace {
public:
ScopedTrace(TraceItem::Type t, const std::string& name);
ScopedTrace(TraceItem::Type t, const Label& label);
~ScopedTrace();
void SetToolchain(const Label& label);
void SetCommandLine(const base::CommandLine& cmdline);
void Done();
private:
TraceItem* item_;
bool done_;
};
// Call to turn tracing on. It's off by default.
void EnableTracing();
// Adds a trace event to the log. Takes ownership of the pointer.
void AddTrace(TraceItem* item);
// Returns a summary of the current traces, or the empty string if tracing is
// not enabled.
std::string SummarizeTraces();
// Saves the current traces to the given filename in JSON format.
void SaveTraces(const base::FilePath& file_name);
#endif // TOOLS_GN_TRACE_H_
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