|  | // 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 <stddef.h> | 
|  |  | 
|  | #include <string> | 
|  |  | 
|  | #include "base/files/file_path.h" | 
|  | #include "base/macros.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_ |