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// Copyright 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 CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_
#define CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_
#include <string>
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "content/common/content_export.h"
namespace base {
class FilePath;
class WaitableEvent;
}
namespace content {
// This class is intended to dump the tracing results of the shutdown process
// to a file before the browser process exits.
// It will save the file either into the command line passed
// "--trace-shutdown-file=<name>" parameter - or - to "chrometrace.log" in the
// current directory.
// Use the class with a scoped_ptr to get files written in the destructor.
// Note that we cannot use the asynchronous file writer since the
// |SequencedWorkerPool| will get killed in the shutdown process.
class BrowserShutdownProfileDumper {
public:
explicit BrowserShutdownProfileDumper(const base::FilePath& dump_file_name);
~BrowserShutdownProfileDumper();
// Returns the file name where we should save the shutdown trace dump to.
static base::FilePath GetShutdownProfileFileName();
private:
// Writes all traces which happened to disk.
void WriteTracesToDisc();
void EndTraceAndFlush(base::WaitableEvent* flush_complete_event);
// The callback for the |TraceLog::Flush| function. It saves all traces to
// disc.
void WriteTraceDataCollected(
base::WaitableEvent* flush_complete_event,
const scoped_refptr<base::RefCountedString>& events_str,
bool has_more_events);
// Returns true if the dump file is valid.
bool IsFileValid();
// Writes a string to the dump file.
void WriteString(const std::string& string);
// Write a buffer to the dump file.
void WriteChars(const char* chars, size_t size);
// Closes the dump file.
void CloseFile();
// The name of the dump file.
const base::FilePath dump_file_name_;
// The number of blocks we have already written.
int blocks_;
// For dumping the content to disc.
FILE* dump_file_;
DISALLOW_COPY_AND_ASSIGN(BrowserShutdownProfileDumper);
};
} // namespace content
#endif // CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_
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