js/src/jscrashreport.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * vim: set ts=8 sts=4 et sw=4 tw=99:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef jscrashreport_h
   8 #define jscrashreport_h
   9
  10 #include "mozilla/GuardObjects.h"
  11
  12 #include <stdint.h>
  13
  14 namespace js {
  15 namespace crash {
  16
  17 void
  18 SnapshotGCStack();
  19
  20 void
  21 SnapshotErrorStack();
  22
  23 void
  24 SaveCrashData(uint64_t tag, void* ptr, size_t size);
  25
  26 template<size_t size, unsigned char marker>
  27 class StackBuffer
  28 {
  29   public:
  30     explicit StackBuffer(void* data
  31                          MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
  32     {
  33         MOZ_GUARD_OBJECT_NOTIFIER_INIT;
  34
  35         buffer[0] = marker;
  36         buffer[1] = '[';
  37
  38         for (size_t i = 0; i < size; i++) {
  39             if (data)
  40                 buffer[i + 2] = static_cast<unsigned char*>(data)[i];
  41             else
  42                 buffer[i + 2] = 0;
  43         }
  44
  45         buffer[size - 2] = ']';
  46         buffer[size - 1] = marker;
  47     }
  48
  49   private:
  50     MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
  51     volatile unsigned char buffer[size + 4];
  52 };
  53
  54 } /* namespace crash */
  55 } /* namespace js */
  56
  57 #endif /* jscrashreport_h */