1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_ 6#define CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_ 7 8#include <string> 9 10#include "base/basictypes.h" 11#include "base/files/file_path.h" 12#include "base/memory/ref_counted.h" 13#include "base/memory/ref_counted_memory.h" 14#include "content/common/content_export.h" 15 16namespace base { 17class FilePath; 18class WaitableEvent; 19} 20 21namespace content { 22 23// This class is intended to dump the tracing results of the shutdown process 24// to a file before the browser process exits. 25// It will save the file either into the command line passed 26// "--trace-shutdown-file=<name>" parameter - or - to "chrometrace.log" in the 27// current directory. 28// Use the class with a scoped_ptr to get files written in the destructor. 29// Note that we cannot use the asynchronous file writer since the 30// |SequencedWorkerPool| will get killed in the shutdown process. 31class BrowserShutdownProfileDumper { 32 public: 33 explicit BrowserShutdownProfileDumper(const base::FilePath& dump_file_name); 34 35 ~BrowserShutdownProfileDumper(); 36 37 // Returns the file name where we should save the shutdown trace dump to. 38 static base::FilePath GetShutdownProfileFileName(); 39 40 private: 41 // Writes all traces which happened to disk. 42 void WriteTracesToDisc(); 43 44 void EndTraceAndFlush(base::WaitableEvent* flush_complete_event); 45 46 // The callback for the |TraceLog::Flush| function. It saves all traces to 47 // disc. 48 void WriteTraceDataCollected( 49 base::WaitableEvent* flush_complete_event, 50 const scoped_refptr<base::RefCountedString>& events_str, 51 bool has_more_events); 52 53 // Returns true if the dump file is valid. 54 bool IsFileValid(); 55 56 // Writes a string to the dump file. 57 void WriteString(const std::string& string); 58 59 // Write a buffer to the dump file. 60 void WriteChars(const char* chars, size_t size); 61 62 // Closes the dump file. 63 void CloseFile(); 64 65 // The name of the dump file. 66 const base::FilePath dump_file_name_; 67 68 // The number of blocks we have already written. 69 int blocks_; 70 // For dumping the content to disc. 71 FILE* dump_file_; 72 73 DISALLOW_COPY_AND_ASSIGN(BrowserShutdownProfileDumper); 74}; 75 76} // namespace content 77 78#endif // CONTENT_BROWSER_BROWSER_SHUTDOWN_PROFILE_DUMPER_H_ 79