components/crash/tools/crash_service.h

   1 // Copyright (c) 2011 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 COMPONENTS_CRASH_TOOLS_CRASH_SERVICE_H_
   6 #define COMPONENTS_CRASH_TOOLS_CRASH_SERVICE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/files/file_path.h"
  12 #include "base/synchronization/lock.h"
  13
  14 namespace google_breakpad {
  15
  16 class CrashReportSender;
  17 class CrashGenerationServer;
  18 class ClientInfo;
  19
  20 }
  21
  22 namespace breakpad {
  23
  24 // This class implements an out-of-process crash server. It uses breakpad's
  25 // CrashGenerationServer and CrashReportSender to generate and then send the
  26 // crash dumps. Internally, it uses OS specific pipe to allow applications to
  27 // register for crash dumps and later on when a registered application crashes
  28 // it will signal an event that causes this code to wake up and perform a
  29 // crash dump on the signaling process. The dump is then stored on disk and
  30 // possibly sent to the crash2 servers.
  31 class CrashService {
  32  public:
  33   CrashService();
  34   ~CrashService();
  35
  36   // Starts servicing crash dumps. Returns false if it failed. Do not use
  37   // other members in that case. |operating_dir| is where the CrashService
  38   // should store breakpad's checkpoint file. |dumps_path| is the directory
  39   // where the crash dumps should be stored.
  40   bool Initialize(const base::FilePath& operating_dir,
  41                   const base::FilePath& dumps_path);
  42
  43   // Command line switches:
  44   //
  45   // --max-reports=<number>
  46   // Allows to override the maximum number for reports per day. Normally
  47   // the crash dumps are never sent so if you want to send any you must
  48   // specify a positive number here.
  49   static const char kMaxReports[];
  50   // --no-window
  51   // Does not create a visible window on the desktop. The window does not have
  52   // any other functionality other than allowing the crash service to be
  53   // gracefully closed.
  54   static const char kNoWindow[];
  55   // --reporter=<string>
  56   // Allows to specify a custom string that appears on the detail crash report
  57   // page in the crash server. This should be a 25 chars or less string.
  58   // The default tag if not specified is 'crash svc'.
  59   static const char kReporterTag[];
  60   // --dumps-dir=<directory-path>
  61   // Override the directory to which crash dump files will be written.
  62   static const char kDumpsDir[];
  63   // --pipe-name=<string>
  64   // Override the name of the Windows named pipe on which we will
  65   // listen for crash dump request messages.
  66   static const char kPipeName[];
  67
  68   // Returns number of crash dumps handled.
  69   int requests_handled() const {
  70     return requests_handled_;
  71   }
  72   // Returns number of crash clients registered.
  73   int clients_connected() const {
  74     return clients_connected_;
  75   }
  76   // Returns number of crash clients terminated.
  77   int clients_terminated() const {
  78     return clients_terminated_;
  79   }
  80
  81   // Starts the processing loop. This function does not return unless the
  82   // user is logging off or the user closes the crash service window. The
  83   // return value is a good number to pass in ExitProcess().
  84   int ProcessingLoop();
  85
  86  private:
  87   static void OnClientConnected(void* context,
  88                                 const google_breakpad::ClientInfo* client_info);
  89
  90   static void OnClientDumpRequest(
  91       void* context,
  92       const google_breakpad::ClientInfo* client_info,
  93       const std::wstring* file_path);
  94
  95   static void OnClientExited(void* context,
  96                              const google_breakpad::ClientInfo* client_info);
  97
  98   // This routine sends the crash dump to the server. It takes the sending_
  99   // lock when it is performing the send.
 100   static unsigned long __stdcall AsyncSendDump(void* context);
 101
 102   // Returns the security descriptor which access to low integrity processes
 103   // The caller is supposed to free the security descriptor by calling
 104   // LocalFree.
 105   PSECURITY_DESCRIPTOR GetSecurityDescriptorForLowIntegrity();
 106
 107   google_breakpad::CrashGenerationServer* dumper_;
 108   google_breakpad::CrashReportSender* sender_;
 109
 110   // the extra tag sent to the server with each dump.
 111   std::wstring reporter_tag_;
 112
 113   // clients serviced statistics:
 114   int requests_handled_;
 115   int requests_sent_;
 116   volatile long clients_connected_;
 117   volatile long clients_terminated_;
 118   base::Lock sending_;
 119
 120   DISALLOW_COPY_AND_ASSIGN(CrashService);
 121 };
 122
 123 }  // namespace breakpad
 124
 125 #endif  // COMPONENTS_CRASH_TOOLS_CRASH_SERVICE_H_