xpcom/base/IntentionalCrash.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   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 mozilla_IntentionalCrash_h
   8 #define mozilla_IntentionalCrash_h
   9
  10 #include <string>
  11 #include <sstream>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14
  15 #ifdef XP_WIN
  16 #  include <process.h>
  17 #  define getpid _getpid
  18 #else
  19 #  include <unistd.h>
  20 #endif
  21
  22 namespace mozilla {
  23
  24 inline void NoteIntentionalCrash(const char* aProcessType, uint32_t aPid = 0) {
  25 // In opt builds we don't actually have the leak checking enabled, and the
  26 // sandbox doesn't allow writing to this path, so we just disable this
  27 // function's behaviour.
  28 #ifdef MOZ_DEBUG
  29   char* f = getenv("XPCOM_MEM_BLOAT_LOG");
  30   if (!f) {
  31     return;
  32   }
  33
  34   fprintf(stderr, "XPCOM_MEM_BLOAT_LOG: %s\n", f);
  35
  36   uint32_t processPid = aPid == 0 ? getpid() : aPid;
  37
  38   std::ostringstream bloatName;
  39   std::string processType(aProcessType);
  40   if (!processType.compare("default")) {
  41     bloatName << f;
  42   } else {
  43     std::string bloatLog(f);
  44
  45     bool hasExt = false;
  46     if (bloatLog.size() >= 4 &&
  47         bloatLog.compare(bloatLog.size() - 4, 4, ".log", 4) == 0) {
  48       hasExt = true;
  49       bloatLog.erase(bloatLog.size() - 4, 4);
  50     }
  51
  52     bloatName << bloatLog << "_" << processType << "_pid" << processPid;
  53     if (hasExt) {
  54       bloatName << ".log";
  55     }
  56   }
  57
  58   fprintf(stderr, "Writing to log: %s\n", bloatName.str().c_str());
  59
  60   FILE* processfd = fopen(bloatName.str().c_str(), "a");
  61   if (processfd) {
  62     fprintf(processfd, "\n==> process %d will purposefully crash\n",
  63             processPid);
  64     fclose(processfd);
  65   }
  66 #endif
  67 }
  68
  69 }  // namespace mozilla
  70
  71 #endif  // mozilla_IntentionalCrash_h