diff -r 000000000000 -r 6474c204b198 toolkit/crashreporter/nsExceptionHandler.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/crashreporter/nsExceptionHandler.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,3127 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsExceptionHandler.h"
+#include "nsDataHashtable.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/dom/CrashReporterChild.h"
+#include "mozilla/Services.h"
+#include "nsIObserverService.h"
+#include "mozilla/unused.h"
+
+#include "nsThreadUtils.h"
+#include "nsXULAppAPI.h"
+
+#if defined(XP_WIN32)
+#ifdef WIN32_LEAN_AND_MEAN
+#undef WIN32_LEAN_AND_MEAN
+#endif
+
+#include "nsXULAppAPI.h"
+#include "nsIXULAppInfo.h"
+#include "nsIWindowsRegKey.h"
+#include "client/windows/crash_generation/client_info.h"
+#include "client/windows/crash_generation/crash_generation_server.h"
+#include "client/windows/handler/exception_handler.h"
+#include <dbghelp.h>
+#include <string.h>
+#include "nsDirectoryServiceUtils.h"
+
+#include "nsWindowsDllInterceptor.h"
+#elif defined(XP_MACOSX)
+#include "client/mac/crash_generation/client_info.h"
+#include "client/mac/crash_generation/crash_generation_server.h"
+#include "client/mac/handler/exception_handler.h"
+#include <string>
+#include <Carbon/Carbon.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <crt_externs.h>
+#include <fcntl.h>
+#include <mach/mach.h>
+#include <sys/types.h>
+#include <spawn.h>
+#include <unistd.h>
+#include "mac_utils.h"
+#elif defined(XP_LINUX)
+#include "nsIINIParser.h"
+#include "common/linux/linux_libc_support.h"
+#include "third_party/lss/linux_syscall_support.h"
+#include "client/linux/crash_generation/client_info.h"
+#include "client/linux/crash_generation/crash_generation_server.h"
+#include "client/linux/handler/exception_handler.h"
+#include <fcntl.h>
+#include <sys/types.h>
+#include <unistd.h>
+#elif defined(XP_SOLARIS)
+#include "client/solaris/handler/exception_handler.h"
+#include <fcntl.h>
+#include <sys/types.h>
+#include <unistd.h>
+#else
+#error "Not yet implemented for this platform"
+#endif // defined(XP_WIN32)
+
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+#include "InjectCrashReporter.h"
+using mozilla::InjectCrashRunnable;
+#endif
+
+#include <stdlib.h>
+#include <time.h>
+#include <prenv.h>
+#include <prio.h>
+#include <prmem.h>
+#include "mozilla/Mutex.h"
+#include "nsDebug.h"
+#include "nsCRT.h"
+#include "nsIFile.h"
+#include "prprf.h"
+#include <map>
+#include <vector>
+
+#include "mozilla/IOInterposer.h"
+#include "mozilla/mozalloc_oom.h"
+#include "mozilla/WindowsDllBlocklist.h"
+
+#if defined(XP_MACOSX)
+CFStringRef reporterClientAppID = CFSTR("org.mozilla.crashreporter");
+#endif
+#if defined(MOZ_WIDGET_ANDROID)
+#include "common/linux/file_id.h"
+#endif
+
+using google_breakpad::CrashGenerationServer;
+using google_breakpad::ClientInfo;
+#ifdef XP_LINUX
+using google_breakpad::MinidumpDescriptor;
+#endif
+using namespace mozilla;
+using mozilla::dom::CrashReporterChild;
+using mozilla::dom::PCrashReporterChild;
+
+namespace CrashReporter {
+
+#ifdef XP_WIN32
+typedef wchar_t XP_CHAR;
+typedef std::wstring xpstring;
+#define CONVERT_XP_CHAR_TO_UTF16(x) x
+#define XP_STRLEN(x) wcslen(x)
+#define my_strlen strlen
+#define CRASH_REPORTER_FILENAME "crashreporter.exe"
+#define PATH_SEPARATOR "\\"
+#define XP_PATH_SEPARATOR L"\\"
+// sort of arbitrary, but MAX_PATH is kinda small
+#define XP_PATH_MAX 4096
+// "<reporter path>" "<minidump path>"
+#define CMDLINE_SIZE ((XP_PATH_MAX * 2) + 6)
+#ifdef _USE_32BIT_TIME_T
+#define XP_TTOA(time, buffer, base) ltoa(time, buffer, base)
+#else
+#define XP_TTOA(time, buffer, base) _i64toa(time, buffer, base)
+#endif
+#define XP_STOA(size, buffer, base) _ui64toa(size, buffer, base)
+#else
+typedef char XP_CHAR;
+typedef std::string xpstring;
+#define CONVERT_XP_CHAR_TO_UTF16(x) NS_ConvertUTF8toUTF16(x)
+#define CRASH_REPORTER_FILENAME "crashreporter"
+#define PATH_SEPARATOR "/"
+#define XP_PATH_SEPARATOR "/"
+#define XP_PATH_MAX PATH_MAX
+#ifdef XP_LINUX
+#define XP_STRLEN(x) my_strlen(x)
+#define XP_TTOA(time, buffer, base) my_inttostring(time, buffer, sizeof(buffer))
+#define XP_STOA(size, buffer, base) my_inttostring(size, buffer, sizeof(buffer))
+#else
+#define XP_STRLEN(x) strlen(x)
+#define XP_TTOA(time, buffer, base) sprintf(buffer, "%ld", time)
+#define XP_STOA(size, buffer, base) sprintf(buffer, "%zu", size)
+#define my_strlen strlen
+#define sys_close close
+#define sys_fork fork
+#define sys_open open
+#define sys_write write
+#endif
+#endif // XP_WIN32
+
+static const XP_CHAR dumpFileExtension[] = {'.', 'd', 'm', 'p',
+                                            '\0'}; // .dmp
+static const XP_CHAR extraFileExtension[] = {'.', 'e', 'x', 't',
+                                             'r', 'a', '\0'}; // .extra
+
+static const char kCrashMainID[] = "crash.main.1\n";
+
+static google_breakpad::ExceptionHandler* gExceptionHandler = nullptr;
+
+static XP_CHAR* pendingDirectory;
+static XP_CHAR* crashReporterPath;
+
+// Where crash events should go.
+static XP_CHAR* eventsDirectory;
+
+// If this is false, we don't launch the crash reporter
+static bool doReport = true;
+
+// If this is true, we don't have a crash reporter
+static bool headlessClient = false;
+
+// if this is true, we pass the exception on to the OS crash reporter
+static bool showOSCrashReporter = false;
+
+// The time of the last recorded crash, as a time_t value.
+static time_t lastCrashTime = 0;
+// The pathname of a file to store the crash time in
+static XP_CHAR lastCrashTimeFilename[XP_PATH_MAX] = {0};
+
+// A marker file to hold the path to the last dump written, which
+// will be checked on startup.
+static XP_CHAR crashMarkerFilename[XP_PATH_MAX] = {0};
+
+// Whether we've already looked for the marker file.
+static bool lastRunCrashID_checked = false;
+// The minidump ID contained in the marker file.
+static nsString* lastRunCrashID = nullptr;
+
+#if defined(MOZ_WIDGET_ANDROID)
+// on Android 4.2 and above there is a user serial number associated
+// with the current process that gets lost when we fork so we need to
+// explicitly pass it to am
+static char* androidUserSerial = nullptr;
+#endif
+
+// these are just here for readability
+static const char kCrashTimeParameter[] = "CrashTime=";
+static const int kCrashTimeParameterLen = sizeof(kCrashTimeParameter)-1;
+
+static const char kTimeSinceLastCrashParameter[] = "SecondsSinceLastCrash=";
+static const int kTimeSinceLastCrashParameterLen =
+                                     sizeof(kTimeSinceLastCrashParameter)-1;
+
+static const char kSysMemoryParameter[] = "SystemMemoryUsePercentage=";
+static const int kSysMemoryParameterLen = sizeof(kSysMemoryParameter)-1;
+
+static const char kTotalVirtualMemoryParameter[] = "TotalVirtualMemory=";
+static const int kTotalVirtualMemoryParameterLen =
+  sizeof(kTotalVirtualMemoryParameter)-1;
+
+static const char kAvailableVirtualMemoryParameter[] = "AvailableVirtualMemory=";
+static const int kAvailableVirtualMemoryParameterLen =
+  sizeof(kAvailableVirtualMemoryParameter)-1;
+
+static const char kOOMAllocationSizeParameter[] = "OOMAllocationSize=";
+static const int kOOMAllocationSizeParameterLen =
+  sizeof(kOOMAllocationSizeParameter)-1;
+
+static const char kTotalPageFileParameter[] = "TotalPageFile=";
+static const int kTotalPageFileParameterLen =
+  sizeof(kTotalPageFileParameter)-1;
+
+static const char kAvailablePageFileParameter[] = "AvailablePageFile=";
+static const int kAvailablePageFileParameterLen =
+  sizeof(kAvailablePageFileParameter)-1;
+
+static const char kTotalPhysicalMemoryParameter[] = "TotalPhysicalMemory=";
+static const int kTotalPhysicalMemoryParameterLen =
+  sizeof(kTotalPhysicalMemoryParameter)-1;
+
+static const char kAvailablePhysicalMemoryParameter[] = "AvailablePhysicalMemory=";
+static const int kAvailablePhysicalMemoryParameterLen =
+  sizeof(kAvailablePhysicalMemoryParameter)-1;
+
+static const char kIsGarbageCollectingParameter[] = "IsGarbageCollecting=";
+static const int kIsGarbageCollectingParameterLen =
+  sizeof(kIsGarbageCollectingParameter)-1;
+
+static const char kEventLoopNestingLevelParameter[] = "EventLoopNestingLevel=";
+static const int kEventLoopNestingLevelParameterLen =
+  sizeof(kEventLoopNestingLevelParameter)-1;
+
+#ifdef XP_WIN
+static const char kBreakpadReserveAddressParameter[] = "BreakpadReserveAddress=";
+static const int kBreakpadReserveAddressParameterLen =
+  sizeof(kBreakpadReserveAddressParameter)-1;
+
+static const char kBreakpadReserveSizeParameter[] = "BreakpadReserveSize=";
+static const int kBreakpadReserveSizeParameterLen =
+  sizeof(kBreakpadReserveSizeParameter)-1;
+#endif
+
+// this holds additional data sent via the API
+static Mutex* crashReporterAPILock;
+static Mutex* notesFieldLock;
+static AnnotationTable* crashReporterAPIData_Hash;
+static nsCString* crashReporterAPIData = nullptr;
+static nsCString* notesField = nullptr;
+static bool isGarbageCollecting;
+static uint32_t eventloopNestingLevel = 0;
+
+// Avoid a race during application termination.
+static Mutex* dumpSafetyLock;
+static bool isSafeToDump = false;
+
+// OOP crash reporting
+static CrashGenerationServer* crashServer; // chrome process has this
+
+#  if defined(XP_WIN) || defined(XP_MACOSX)
+// If crash reporting is disabled, we hand out this "null" pipe to the
+// child process and don't attempt to connect to a parent server.
+static const char kNullNotifyPipe[] = "-";
+static char* childCrashNotifyPipe;
+
+#  elif defined(XP_LINUX)
+static int serverSocketFd = -1;
+static int clientSocketFd = -1;
+static const int kMagicChildCrashReportFd = 4;
+
+#  endif
+
+// |dumpMapLock| must protect all access to |pidToMinidump|.
+static Mutex* dumpMapLock;
+struct ChildProcessData : public nsUint32HashKey
+{
+  ChildProcessData(KeyTypePointer aKey)
+    : nsUint32HashKey(aKey)
+    , sequence(0)
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+    , callback(nullptr)
+#endif
+  { }
+
+  nsCOMPtr<nsIFile> minidump;
+  // Each crashing process is assigned an increasing sequence number to
+  // indicate which process crashed first.
+  uint32_t sequence;
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+  InjectorCrashCallback* callback;
+#endif
+};
+
+typedef nsTHashtable<ChildProcessData> ChildMinidumpMap;
+static ChildMinidumpMap* pidToMinidump;
+static uint32_t crashSequence;
+static bool OOPInitialized();
+
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+static nsIThread* sInjectorThread;
+
+class ReportInjectedCrash : public nsRunnable
+{
+public:
+  ReportInjectedCrash(uint32_t pid) : mPID(pid) { }
+
+  NS_IMETHOD Run();
+
+private:
+  uint32_t mPID;
+};
+#endif // MOZ_CRASHREPORTER_INJECTOR
+
+// Crashreporter annotations that we don't send along in subprocess
+// reports
+static const char* kSubprocessBlacklist[] = {
+  "FramePoisonBase",
+  "FramePoisonSize",
+  "StartupTime",
+  "URL"
+};
+
+// If annotations are attempted before the crash reporter is enabled,
+// they queue up here.
+class DelayedNote;
+nsTArray<nsAutoPtr<DelayedNote> >* gDelayedAnnotations;
+
+#if defined(XP_WIN)
+// the following are used to prevent other DLLs reverting the last chance
+// exception handler to the windows default. Any attempt to change the 
+// unhandled exception filter or to reset it is ignored and our crash
+// reporter is loaded instead (in case it became unloaded somehow)
+typedef LPTOP_LEVEL_EXCEPTION_FILTER (WINAPI *SetUnhandledExceptionFilter_func)
+  (LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter);
+static SetUnhandledExceptionFilter_func stub_SetUnhandledExceptionFilter = 0;
+static LPTOP_LEVEL_EXCEPTION_FILTER previousUnhandledExceptionFilter = nullptr;
+static WindowsDllInterceptor gKernel32Intercept;
+static bool gBlockUnhandledExceptionFilter = true;
+
+static void NotePreviousUnhandledExceptionFilter()
+{
+  // Set a dummy value to get the previous filter, then restore
+  previousUnhandledExceptionFilter = SetUnhandledExceptionFilter(nullptr);
+  SetUnhandledExceptionFilter(previousUnhandledExceptionFilter);
+}
+
+static LPTOP_LEVEL_EXCEPTION_FILTER WINAPI
+patched_SetUnhandledExceptionFilter (LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter)
+{
+  if (!gBlockUnhandledExceptionFilter) {
+    // don't intercept
+    return stub_SetUnhandledExceptionFilter(lpTopLevelExceptionFilter);
+  }
+
+  if (lpTopLevelExceptionFilter == previousUnhandledExceptionFilter) {
+    // OK to swap back and forth between the previous filter
+    previousUnhandledExceptionFilter =
+      stub_SetUnhandledExceptionFilter(lpTopLevelExceptionFilter);
+    return previousUnhandledExceptionFilter;
+  }
+
+  // intercept attempts to change the filter
+  return nullptr;
+}
+
+/**
+ * Reserve some VM space. In the event that we crash because VM space is
+ * being leaked without leaking memory, freeing this space before taking
+ * the minidump will allow us to collect a minidump.
+ *
+ * This size is bigger than xul.dll plus some extra for MinidumpWriteDump
+ * allocations.
+ */
+static const SIZE_T kReserveSize = 0x2800000; // 40 MB
+static void* gBreakpadReservedVM;
+#endif
+
+#ifdef XP_MACOSX
+static cpu_type_t pref_cpu_types[2] = {
+#if defined(__i386__)
+                                 CPU_TYPE_X86,
+#elif defined(__x86_64__)
+                                 CPU_TYPE_X86_64,
+#elif defined(__ppc__)
+                                 CPU_TYPE_POWERPC,
+#endif
+                                 CPU_TYPE_ANY };
+
+static posix_spawnattr_t spawnattr;
+#endif
+
+#if defined(MOZ_WIDGET_ANDROID)
+// Android builds use a custom library loader,
+// so the embedding will provide a list of shared
+// libraries that are mapped into anonymous mappings.
+typedef struct {
+  std::string name;
+  uintptr_t   start_address;
+  size_t      length;
+  size_t      file_offset;
+} mapping_info;
+static std::vector<mapping_info> library_mappings;
+typedef std::map<uint32_t,google_breakpad::MappingList> MappingMap;
+#endif
+
+#ifdef XP_LINUX
+inline void
+my_inttostring(intmax_t t, char* buffer, size_t buffer_length)
+{
+  my_memset(buffer, 0, buffer_length);
+  my_uitos(buffer, t, my_uint_len(t));
+}
+#endif
+
+#ifdef XP_WIN
+static void
+CreateFileFromPath(const xpstring& path, nsIFile** file)
+{
+  NS_NewLocalFile(nsDependentString(path.c_str()), false, file);
+}
+#else
+static void
+CreateFileFromPath(const xpstring& path, nsIFile** file)
+{
+  NS_NewNativeLocalFile(nsDependentCString(path.c_str()), false, file);
+}
+#endif
+
+static XP_CHAR*
+Concat(XP_CHAR* str, const XP_CHAR* toAppend, int* size)
+{
+  int appendLen = XP_STRLEN(toAppend);
+  if (appendLen >= *size) appendLen = *size - 1;
+
+  memcpy(str, toAppend, appendLen * sizeof(XP_CHAR));
+  str += appendLen;
+  *str = '\0';
+  *size -= appendLen;
+
+  return str;
+}
+
+static size_t gOOMAllocationSize = 0;
+
+void AnnotateOOMAllocationSize(size_t size)
+{
+  gOOMAllocationSize = size;
+}
+
+bool MinidumpCallback(
+#ifdef XP_LINUX
+                      const MinidumpDescriptor& descriptor,
+#else
+                      const XP_CHAR* dump_path,
+                      const XP_CHAR* minidump_id,
+#endif
+                      void* context,
+#ifdef XP_WIN32
+                      EXCEPTION_POINTERS* exinfo,
+                      MDRawAssertionInfo* assertion,
+#endif
+                      bool succeeded)
+{
+  bool returnValue = showOSCrashReporter ? false : succeeded;
+
+  static XP_CHAR minidumpPath[XP_PATH_MAX];
+  int size = XP_PATH_MAX;
+  XP_CHAR* p;
+#ifndef XP_LINUX
+  p = Concat(minidumpPath, dump_path, &size);
+  p = Concat(p, XP_PATH_SEPARATOR, &size);
+  p = Concat(p, minidump_id, &size);
+  Concat(p, dumpFileExtension, &size);
+#else
+  Concat(minidumpPath, descriptor.path(), &size);
+#endif
+
+  static XP_CHAR extraDataPath[XP_PATH_MAX];
+  size = XP_PATH_MAX;
+#ifndef XP_LINUX
+  p = Concat(extraDataPath, dump_path, &size);
+  p = Concat(p, XP_PATH_SEPARATOR, &size);
+  p = Concat(p, minidump_id, &size);
+#else
+  p = Concat(extraDataPath, descriptor.path(), &size);
+  // Skip back past the .dmp extension.
+  p -= 4;
+#endif
+  Concat(p, extraFileExtension, &size);
+
+  if (headlessClient) {
+    // Leave a marker indicating that there was a crash.
+#if defined(XP_WIN32)
+    HANDLE hFile = CreateFile(crashMarkerFilename, GENERIC_WRITE, 0,
+                              nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
+                              nullptr);
+    if(hFile != INVALID_HANDLE_VALUE) {
+      DWORD nBytes;
+      WriteFile(hFile, minidumpPath, 2*wcslen(minidumpPath), &nBytes, nullptr);
+      CloseHandle(hFile);
+    }
+#elif defined(XP_UNIX)
+    int fd = sys_open(crashMarkerFilename,
+                      O_WRONLY | O_CREAT | O_TRUNC,
+                      0600);
+    if (fd != -1) {
+      unused << sys_write(fd, minidumpPath, my_strlen(minidumpPath));
+      sys_close(fd);
+    }
+#endif
+  }
+
+  char oomAllocationSizeBuffer[32];
+  int oomAllocationSizeBufferLen = 0;
+  if (gOOMAllocationSize) {
+    XP_STOA(gOOMAllocationSize, oomAllocationSizeBuffer, 10);
+    oomAllocationSizeBufferLen = my_strlen(oomAllocationSizeBuffer);
+  }
+
+  // calculate time since last crash (if possible), and store
+  // the time of this crash.
+  time_t crashTime;
+#ifdef XP_LINUX
+  struct kernel_timeval tv;
+  sys_gettimeofday(&tv, nullptr);
+  crashTime = tv.tv_sec;
+#else
+  crashTime = time(nullptr);
+#endif
+  time_t timeSinceLastCrash = 0;
+  // stringified versions of the above
+  char crashTimeString[32];
+  int crashTimeStringLen = 0;
+  char timeSinceLastCrashString[32];
+  int timeSinceLastCrashStringLen = 0;
+
+  XP_TTOA(crashTime, crashTimeString, 10);
+  crashTimeStringLen = my_strlen(crashTimeString);
+  if (lastCrashTime != 0) {
+    timeSinceLastCrash = crashTime - lastCrashTime;
+    XP_TTOA(timeSinceLastCrash, timeSinceLastCrashString, 10);
+    timeSinceLastCrashStringLen = my_strlen(timeSinceLastCrashString);
+  }
+  // write crash time to file
+  if (lastCrashTimeFilename[0] != 0) {
+#if defined(XP_WIN32)
+    HANDLE hFile = CreateFile(lastCrashTimeFilename, GENERIC_WRITE, 0,
+                              nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
+                              nullptr);
+    if(hFile != INVALID_HANDLE_VALUE) {
+      DWORD nBytes;
+      WriteFile(hFile, crashTimeString, crashTimeStringLen, &nBytes, nullptr);
+      CloseHandle(hFile);
+    }
+#elif defined(XP_UNIX)
+    int fd = sys_open(lastCrashTimeFilename,
+                      O_WRONLY | O_CREAT | O_TRUNC,
+                      0600);
+    if (fd != -1) {
+      unused << sys_write(fd, crashTimeString, crashTimeStringLen);
+      sys_close(fd);
+    }
+#endif
+  }
+
+  // Write crash event file.
+
+  // Minidump IDs are UUIDs (36) + NULL.
+  static char id_ascii[37];
+#ifdef XP_LINUX
+  const char * index = strrchr(descriptor.path(), '/');
+  MOZ_ASSERT(index);
+  MOZ_ASSERT(strlen(index) == 1 + 36 + 4); // "/" + UUID + ".dmp"
+  for (uint32_t i = 0; i < 36; i++) {
+    id_ascii[i] = *(index + 1 + i);
+  }
+#else
+  MOZ_ASSERT(XP_STRLEN(minidump_id) == 36);
+  for (uint32_t i = 0; i < 36; i++) {
+    id_ascii[i] = *((char *)(minidump_id + i));
+  }
+#endif
+
+  if (eventsDirectory) {
+    static XP_CHAR crashEventPath[XP_PATH_MAX];
+    int size = XP_PATH_MAX;
+    XP_CHAR* p;
+    p = Concat(crashEventPath, eventsDirectory, &size);
+    p = Concat(p, XP_PATH_SEPARATOR, &size);
+#ifdef XP_LINUX
+    p = Concat(p, id_ascii, &size);
+#else
+    p = Concat(p, minidump_id, &size);
+#endif
+
+#if defined(XP_WIN32)
+    HANDLE hFile = CreateFile(crashEventPath, GENERIC_WRITE, 0,
+                              nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
+                              nullptr);
+    if (hFile != INVALID_HANDLE_VALUE) {
+      DWORD nBytes;
+      WriteFile(hFile, kCrashMainID, sizeof(kCrashMainID) - 1, &nBytes,
+                nullptr);
+      WriteFile(hFile, crashTimeString, crashTimeStringLen, &nBytes, nullptr);
+      WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      WriteFile(hFile, id_ascii, strlen(id_ascii), &nBytes, nullptr);
+      CloseHandle(hFile);
+    }
+#elif defined(XP_UNIX)
+    int fd = sys_open(crashEventPath,
+                      O_WRONLY | O_CREAT | O_TRUNC,
+                      0600);
+    if (fd != -1) {
+      unused << sys_write(fd, kCrashMainID, sizeof(kCrashMainID) - 1);
+      unused << sys_write(fd, crashTimeString, crashTimeStringLen);
+      unused << sys_write(fd, "\n", 1);
+      unused << sys_write(fd, id_ascii, strlen(id_ascii));
+      sys_close(fd);
+    }
+#endif
+  }
+
+#if defined(XP_WIN32)
+  if (!crashReporterAPIData->IsEmpty()) {
+    // write out API data
+    HANDLE hFile = CreateFile(extraDataPath, GENERIC_WRITE, 0,
+                              nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
+                              nullptr);
+    if(hFile != INVALID_HANDLE_VALUE) {
+      DWORD nBytes;
+      WriteFile(hFile, crashReporterAPIData->get(),
+                crashReporterAPIData->Length(), &nBytes, nullptr);
+      WriteFile(hFile, kCrashTimeParameter, kCrashTimeParameterLen,
+                &nBytes, nullptr);
+      WriteFile(hFile, crashTimeString, crashTimeStringLen, &nBytes, nullptr);
+      WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      if (timeSinceLastCrash != 0) {
+        WriteFile(hFile, kTimeSinceLastCrashParameter,
+                  kTimeSinceLastCrashParameterLen, &nBytes, nullptr);
+        WriteFile(hFile, timeSinceLastCrashString, timeSinceLastCrashStringLen,
+                  &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      }
+      if (isGarbageCollecting) {
+        WriteFile(hFile, kIsGarbageCollectingParameter, kIsGarbageCollectingParameterLen,
+                  &nBytes, nullptr);
+        WriteFile(hFile, isGarbageCollecting ? "1" : "0", 1, &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      }
+
+      char buffer[128];
+      int bufferLen;
+
+      if (eventloopNestingLevel > 0) {
+        WriteFile(hFile, kEventLoopNestingLevelParameter, kEventLoopNestingLevelParameterLen,
+                  &nBytes, nullptr);
+        _ultoa(eventloopNestingLevel, buffer, 10);
+        WriteFile(hFile, buffer, strlen(buffer), &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      }
+
+      if (gBreakpadReservedVM) {
+        WriteFile(hFile, kBreakpadReserveAddressParameter, kBreakpadReserveAddressParameterLen, &nBytes, nullptr);
+        _ui64toa(uintptr_t(gBreakpadReservedVM), buffer, 10);
+        WriteFile(hFile, buffer, strlen(buffer), &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+        WriteFile(hFile, kBreakpadReserveSizeParameter, kBreakpadReserveSizeParameterLen, &nBytes, nullptr);
+        _ui64toa(kReserveSize, buffer, 10);
+        WriteFile(hFile, buffer, strlen(buffer), &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      }
+
+#ifdef HAS_DLL_BLOCKLIST
+      DllBlocklist_WriteNotes(hFile);
+#endif
+
+      // Try to get some information about memory.
+      MEMORYSTATUSEX statex;
+      statex.dwLength = sizeof(statex);
+      if (GlobalMemoryStatusEx(&statex)) {
+
+#define WRITE_STATEX_FIELD(field, paramName, conversionFunc)     \
+        WriteFile(hFile, k##paramName##Parameter,                \
+                  k##paramName##ParameterLen, &nBytes, nullptr); \
+        conversionFunc(statex.field, buffer, 10);                \
+        bufferLen = strlen(buffer);                              \
+        WriteFile(hFile, buffer, bufferLen, &nBytes, nullptr);   \
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+
+        WRITE_STATEX_FIELD(dwMemoryLoad, SysMemory, ltoa);
+        WRITE_STATEX_FIELD(ullTotalVirtual, TotalVirtualMemory, _ui64toa);
+        WRITE_STATEX_FIELD(ullAvailVirtual, AvailableVirtualMemory, _ui64toa);
+        WRITE_STATEX_FIELD(ullTotalPageFile, TotalPageFile, _ui64toa);
+        WRITE_STATEX_FIELD(ullAvailPageFile, AvailablePageFile, _ui64toa);
+        WRITE_STATEX_FIELD(ullTotalPhys, TotalPhysicalMemory, _ui64toa);
+        WRITE_STATEX_FIELD(ullAvailPhys, AvailablePhysicalMemory, _ui64toa);
+
+#undef WRITE_STATEX_FIELD
+      }
+
+      if (oomAllocationSizeBufferLen) {
+        WriteFile(hFile, kOOMAllocationSizeParameter,
+                  kOOMAllocationSizeParameterLen, &nBytes, nullptr);
+        WriteFile(hFile, oomAllocationSizeBuffer, oomAllocationSizeBufferLen,
+                  &nBytes, nullptr);
+        WriteFile(hFile, "\n", 1, &nBytes, nullptr);
+      }
+      CloseHandle(hFile);
+    }
+  }
+
+  if (!doReport) {
+    return returnValue;
+  }
+
+  XP_CHAR cmdLine[CMDLINE_SIZE];
+  size = CMDLINE_SIZE;
+  p = Concat(cmdLine, L"\"", &size);
+  p = Concat(p, crashReporterPath, &size);
+  p = Concat(p, L"\" \"", &size);
+  p = Concat(p, minidumpPath, &size);
+  Concat(p, L"\"", &size);
+
+  STARTUPINFO si;
+  PROCESS_INFORMATION pi;
+
+  ZeroMemory(&si, sizeof(si));
+  si.cb = sizeof(si);
+  si.dwFlags = STARTF_USESHOWWINDOW;
+  si.wShowWindow = SW_SHOWNORMAL;
+  ZeroMemory(&pi, sizeof(pi));
+
+  if (CreateProcess(nullptr, (LPWSTR)cmdLine, nullptr, nullptr, FALSE, 0,
+                    nullptr, nullptr, &si, &pi)) {
+    CloseHandle( pi.hProcess );
+    CloseHandle( pi.hThread );
+  }
+  // we're not really in a position to do anything if the CreateProcess fails
+  TerminateProcess(GetCurrentProcess(), 1);
+#elif defined(XP_UNIX)
+  if (!crashReporterAPIData->IsEmpty()) {
+    // write out API data
+    int fd = sys_open(extraDataPath,
+                      O_WRONLY | O_CREAT | O_TRUNC,
+                      0666);
+
+    if (fd != -1) {
+      // not much we can do in case of error
+      unused << sys_write(fd, crashReporterAPIData->get(),
+                                  crashReporterAPIData->Length());
+      unused << sys_write(fd, kCrashTimeParameter, kCrashTimeParameterLen);
+      unused << sys_write(fd, crashTimeString, crashTimeStringLen);
+      unused << sys_write(fd, "\n", 1);
+      if (timeSinceLastCrash != 0) {
+        unused << sys_write(fd, kTimeSinceLastCrashParameter,
+                        kTimeSinceLastCrashParameterLen);
+        unused << sys_write(fd, timeSinceLastCrashString,
+                        timeSinceLastCrashStringLen);
+        unused << sys_write(fd, "\n", 1);
+      }
+      if (isGarbageCollecting) {
+        unused << sys_write(fd, kIsGarbageCollectingParameter, kIsGarbageCollectingParameterLen);
+        unused << sys_write(fd, isGarbageCollecting ? "1" : "0", 1);
+        unused << sys_write(fd, "\n", 1);
+      }
+      if (eventloopNestingLevel > 0) {
+        unused << sys_write(fd, kEventLoopNestingLevelParameter, kEventLoopNestingLevelParameterLen);
+        char buffer[16];
+        XP_TTOA(eventloopNestingLevel, buffer, 10);
+        unused << sys_write(fd, buffer, my_strlen(buffer));
+        unused << sys_write(fd, "\n", 1);
+      }
+      if (oomAllocationSizeBufferLen) {
+        unused << sys_write(fd, kOOMAllocationSizeParameter,
+                            kOOMAllocationSizeParameterLen);
+        unused << sys_write(fd, oomAllocationSizeBuffer,
+                            oomAllocationSizeBufferLen);
+        unused << sys_write(fd, "\n", 1);
+      }
+      sys_close(fd);
+    }
+  }
+
+  if (!doReport) {
+    return returnValue;
+  }
+
+#ifdef XP_MACOSX
+  char* const my_argv[] = {
+    crashReporterPath,
+    minidumpPath,
+    nullptr
+  };
+
+  char **env = nullptr;
+  char ***nsEnv = _NSGetEnviron();
+  if (nsEnv)
+    env = *nsEnv;
+  int result = posix_spawnp(nullptr,
+                            my_argv[0],
+                            nullptr,
+                            &spawnattr,
+                            my_argv,
+                            env);
+
+  if (result != 0)
+    return false;
+
+#else // !XP_MACOSX
+  pid_t pid = sys_fork();
+
+  if (pid == -1)
+    return false;
+  else if (pid == 0) {
+#if !defined(MOZ_WIDGET_ANDROID)
+    // need to clobber this, as libcurl might load NSS,
+    // and we want it to load the system NSS.
+    unsetenv("LD_LIBRARY_PATH");
+    unused << execl(crashReporterPath,
+                    crashReporterPath, minidumpPath, (char*)0);
+#else
+    // Invoke the reportCrash activity using am
+    if (androidUserSerial) {
+      unused << execlp("/system/bin/am",
+                       "/system/bin/am",
+                       "start",
+                       "--user", androidUserSerial,
+                       "-a", "org.mozilla.gecko.reportCrash",
+                       "-n", crashReporterPath,
+                       "--es", "minidumpPath", minidumpPath,
+                       (char*)0);
+    } else {
+      unused << execlp("/system/bin/am",
+                       "/system/bin/am",
+                       "start",
+                       "-a", "org.mozilla.gecko.reportCrash",
+                       "-n", crashReporterPath,
+                       "--es", "minidumpPath", minidumpPath,
+                       (char*)0);
+    }
+#endif
+    _exit(1);
+  }
+#endif // XP_MACOSX
+#endif // XP_UNIX
+
+  return returnValue;
+}
+
+#ifdef XP_WIN
+static void
+ReserveBreakpadVM()
+{
+  if (!gBreakpadReservedVM) {
+    gBreakpadReservedVM = VirtualAlloc(nullptr, kReserveSize, MEM_RESERVE,
+                                       PAGE_NOACCESS);
+  }
+}
+
+static void
+FreeBreakpadVM()
+{
+  if (gBreakpadReservedVM) {
+    VirtualFree(gBreakpadReservedVM, 0, MEM_RELEASE);
+  }
+}
+
+/**
+ * Filters out floating point exceptions which are handled by nsSigHandlers.cpp
+ * and should not be handled as crashes.
+ *
+ * Also calls FreeBreakpadVM if appropriate.
+ */
+static bool FPEFilter(void* context, EXCEPTION_POINTERS* exinfo,
+                      MDRawAssertionInfo* assertion)
+{
+  if (!exinfo) {
+    mozilla::IOInterposer::Disable();
+    FreeBreakpadVM();
+    return true;
+  }
+
+  PEXCEPTION_RECORD e = (PEXCEPTION_RECORD)exinfo->ExceptionRecord;
+  switch (e->ExceptionCode) {
+    case STATUS_FLOAT_DENORMAL_OPERAND:
+    case STATUS_FLOAT_DIVIDE_BY_ZERO:
+    case STATUS_FLOAT_INEXACT_RESULT:
+    case STATUS_FLOAT_INVALID_OPERATION:
+    case STATUS_FLOAT_OVERFLOW:
+    case STATUS_FLOAT_STACK_CHECK:
+    case STATUS_FLOAT_UNDERFLOW:
+    case STATUS_FLOAT_MULTIPLE_FAULTS:
+    case STATUS_FLOAT_MULTIPLE_TRAPS:
+      return false; // Don't write minidump, continue exception search
+  }
+  mozilla::IOInterposer::Disable();
+  FreeBreakpadVM();
+  return true;
+}
+#endif // XP_WIN
+
+static bool ShouldReport()
+{
+  // this environment variable prevents us from launching
+  // the crash reporter client
+  const char *envvar = PR_GetEnv("MOZ_CRASHREPORTER_NO_REPORT");
+  if (envvar && *envvar) {
+    return false;
+  }
+
+  envvar = PR_GetEnv("MOZ_CRASHREPORTER_FULLDUMP");
+  if (envvar && *envvar) {
+    return false;
+  }
+
+  return true;
+}
+
+namespace {
+  bool Filter(void* context) {
+    mozilla::IOInterposer::Disable();
+    return true;
+  }
+}
+
+
+nsresult SetExceptionHandler(nsIFile* aXREDirectory,
+                             bool force/*=false*/)
+{
+  if (gExceptionHandler)
+    return NS_ERROR_ALREADY_INITIALIZED;
+
+#if !defined(DEBUG) || defined(MOZ_WIDGET_GONK)
+  // In non-debug builds, enable the crash reporter by default, and allow
+  // disabling it with the MOZ_CRASHREPORTER_DISABLE environment variable.
+  // Also enable it by default in debug gonk builds as it is difficult to
+  // set environment on startup.
+  const char *envvar = PR_GetEnv("MOZ_CRASHREPORTER_DISABLE");
+  if (envvar && *envvar && !force)
+    return NS_OK;
+#else
+  // In debug builds, disable the crash reporter by default, and allow to
+  // enable it with the MOZ_CRASHREPORTER environment variable.
+  const char *envvar = PR_GetEnv("MOZ_CRASHREPORTER");
+  if ((!envvar || !*envvar) && !force)
+    return NS_OK;
+#endif
+
+#if defined(MOZ_WIDGET_GONK)
+  doReport = false;
+  headlessClient = true;
+#elif defined(XP_WIN)
+  if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Desktop) {
+    doReport = ShouldReport();
+  } else {
+    doReport = false;
+    headlessClient = true;
+  }
+#else
+  // this environment variable prevents us from launching
+  // the crash reporter client
+  doReport = ShouldReport();
+#endif
+
+  // allocate our strings
+  crashReporterAPIData = new nsCString();
+  NS_ENSURE_TRUE(crashReporterAPIData, NS_ERROR_OUT_OF_MEMORY);
+
+  NS_ASSERTION(!crashReporterAPILock, "Shouldn't have a lock yet");
+  crashReporterAPILock = new Mutex("crashReporterAPILock");
+  NS_ASSERTION(!notesFieldLock, "Shouldn't have a lock yet");
+  notesFieldLock = new Mutex("notesFieldLock");
+
+  crashReporterAPIData_Hash =
+    new nsDataHashtable<nsCStringHashKey,nsCString>();
+  NS_ENSURE_TRUE(crashReporterAPIData_Hash, NS_ERROR_OUT_OF_MEMORY);
+
+  notesField = new nsCString();
+  NS_ENSURE_TRUE(notesField, NS_ERROR_OUT_OF_MEMORY);
+
+  if (!headlessClient) {
+    // locate crashreporter executable
+    nsCOMPtr<nsIFile> exePath;
+    nsresult rv = aXREDirectory->Clone(getter_AddRefs(exePath));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+#if defined(XP_MACOSX)
+    exePath->Append(NS_LITERAL_STRING("crashreporter.app"));
+    exePath->Append(NS_LITERAL_STRING("Contents"));
+    exePath->Append(NS_LITERAL_STRING("MacOS"));
+#endif
+
+    exePath->AppendNative(NS_LITERAL_CSTRING(CRASH_REPORTER_FILENAME));
+
+#ifdef XP_WIN32
+    nsString crashReporterPath_temp;
+
+    exePath->GetPath(crashReporterPath_temp);
+    crashReporterPath = reinterpret_cast<wchar_t*>(ToNewUnicode(crashReporterPath_temp));
+#elif !defined(__ANDROID__)
+    nsCString crashReporterPath_temp;
+
+    exePath->GetNativePath(crashReporterPath_temp);
+    crashReporterPath = ToNewCString(crashReporterPath_temp);
+#else
+    // On Android, we launch using the application package name
+    // instead of a filename, so use ANDROID_PACKAGE_NAME to do that here.
+    nsCString package(ANDROID_PACKAGE_NAME "/org.mozilla.gecko.CrashReporter");
+    crashReporterPath = ToNewCString(package);
+#endif
+  }
+
+  // get temp path to use for minidump path
+#if defined(XP_WIN32)
+  nsString tempPath;
+
+  // first figure out buffer size
+  int pathLen = GetTempPath(0, nullptr);
+  if (pathLen == 0)
+    return NS_ERROR_FAILURE;
+
+  tempPath.SetLength(pathLen);
+  GetTempPath(pathLen, (LPWSTR)tempPath.BeginWriting());
+#elif defined(XP_MACOSX)
+  nsCString tempPath;
+  FSRef fsRef;
+  OSErr err = FSFindFolder(kUserDomain, kTemporaryFolderType,
+                           kCreateFolder, &fsRef);
+  if (err != noErr)
+    return NS_ERROR_FAILURE;
+
+  char path[PATH_MAX];
+  OSStatus status = FSRefMakePath(&fsRef, (UInt8*)path, PATH_MAX);
+  if (status != noErr)
+    return NS_ERROR_FAILURE;
+
+  tempPath = path;
+
+#elif defined(__ANDROID__)
+  // GeckoAppShell or Gonk's init.rc sets this in the environment
+  const char *tempenv = PR_GetEnv("TMPDIR");
+  if (!tempenv)
+    return NS_ERROR_FAILURE;
+  nsCString tempPath(tempenv);
+#elif defined(XP_UNIX)
+  // we assume it's always /tmp on unix systems
+  nsCString tempPath = NS_LITERAL_CSTRING("/tmp/");
+#else
+#error "Implement this for your platform"
+#endif
+
+#ifdef XP_MACOSX
+  // Initialize spawn attributes, since this calls malloc.
+  if (posix_spawnattr_init(&spawnattr) != 0) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Set spawn attributes.
+  size_t attr_count = ArrayLength(pref_cpu_types);
+  size_t attr_ocount = 0;
+  if (posix_spawnattr_setbinpref_np(&spawnattr,
+                                    attr_count,
+                                    pref_cpu_types,
+                                    &attr_ocount) != 0 ||
+      attr_ocount != attr_count) {
+    posix_spawnattr_destroy(&spawnattr);
+    return NS_ERROR_FAILURE;
+  }
+#endif
+
+#ifdef XP_WIN32
+  ReserveBreakpadVM();
+
+  MINIDUMP_TYPE minidump_type = MiniDumpNormal;
+
+  // Try to determine what version of dbghelp.dll we're using.
+  // MinidumpWithFullMemoryInfo is only available in 6.1.x or newer.
+
+  DWORD version_size = GetFileVersionInfoSizeW(L"dbghelp.dll", nullptr);
+  if (version_size > 0) {
+    std::vector<BYTE> buffer(version_size);
+    if (GetFileVersionInfoW(L"dbghelp.dll",
+                            0,
+                            version_size,
+                            &buffer[0])) {
+      UINT len;
+      VS_FIXEDFILEINFO* file_info;
+      VerQueryValue(&buffer[0], L"\\", (void**)&file_info, &len);
+      WORD major = HIWORD(file_info->dwFileVersionMS),
+           minor = LOWORD(file_info->dwFileVersionMS),
+           revision = HIWORD(file_info->dwFileVersionLS);
+      if (major > 6 || (major == 6 && minor > 1) ||
+          (major == 6 && minor == 1 && revision >= 7600)) {
+        minidump_type = MiniDumpWithFullMemoryInfo;
+      }
+    }
+  }
+
+  const char* e = PR_GetEnv("MOZ_CRASHREPORTER_FULLDUMP");
+  if (e && *e) {
+    minidump_type = MiniDumpWithFullMemory;
+  }
+#endif // XP_WIN32
+
+#ifdef MOZ_WIDGET_ANDROID
+  androidUserSerial = getenv("MOZ_ANDROID_USER_SERIAL_NUMBER");
+#endif
+
+  // Initialize the flag and mutex used to avoid dump processing
+  // once browser termination has begun.
+  NS_ASSERTION(!dumpSafetyLock, "Shouldn't have a lock yet");
+  // Do not deallocate this lock while it is still possible for
+  // isSafeToDump to be tested on another thread.
+  dumpSafetyLock = new Mutex("dumpSafetyLock");
+  MutexAutoLock lock(*dumpSafetyLock);
+  isSafeToDump = true;
+
+  // now set the exception handler
+#ifdef XP_LINUX
+  MinidumpDescriptor descriptor(tempPath.get());
+#endif
+
+#ifdef XP_WIN
+  NotePreviousUnhandledExceptionFilter();
+#endif
+
+  gExceptionHandler = new google_breakpad::
+    ExceptionHandler(
+#ifdef XP_LINUX
+                     descriptor,
+#else
+                     tempPath.get(),
+#endif
+
+#ifdef XP_WIN
+                     FPEFilter,
+#else
+                     Filter,
+#endif
+                     MinidumpCallback,
+                     nullptr,
+#ifdef XP_WIN32
+                     google_breakpad::ExceptionHandler::HANDLER_ALL,
+                     minidump_type,
+                     (const wchar_t*) nullptr,
+                     nullptr);
+#else
+                     true
+#ifdef XP_MACOSX
+                       , nullptr
+#endif
+#ifdef XP_LINUX
+                       , -1
+#endif
+                      );
+#endif // XP_WIN32
+
+  if (!gExceptionHandler)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+#ifdef XP_WIN
+  gExceptionHandler->set_handle_debug_exceptions(true);
+  
+  // protect the crash reporter from being unloaded
+  gBlockUnhandledExceptionFilter = true;
+  gKernel32Intercept.Init("kernel32.dll");
+  bool ok = gKernel32Intercept.AddHook("SetUnhandledExceptionFilter",
+          reinterpret_cast<intptr_t>(patched_SetUnhandledExceptionFilter),
+          (void**) &stub_SetUnhandledExceptionFilter);
+
+#ifdef DEBUG
+  if (!ok)
+    printf_stderr ("SetUnhandledExceptionFilter hook failed; crash reporter is vulnerable.\n");
+#endif
+#endif
+
+  // store application start time
+  char timeString[32];
+  time_t startupTime = time(nullptr);
+  XP_TTOA(startupTime, timeString, 10);
+  AnnotateCrashReport(NS_LITERAL_CSTRING("StartupTime"),
+                      nsDependentCString(timeString));
+
+#if defined(XP_MACOSX)
+  // On OS X, many testers like to see the OS crash reporting dialog
+  // since it offers immediate stack traces.  We allow them to set
+  // a default to pass exceptions to the OS handler.
+  Boolean keyExistsAndHasValidFormat = false;
+  Boolean prefValue = ::CFPreferencesGetAppBooleanValue(CFSTR("OSCrashReporter"),
+                                                        kCFPreferencesCurrentApplication,
+                                                        &keyExistsAndHasValidFormat);
+  if (keyExistsAndHasValidFormat)
+    showOSCrashReporter = prefValue;
+#endif
+
+#if defined(MOZ_WIDGET_ANDROID)
+  for (unsigned int i = 0; i < library_mappings.size(); i++) {
+    u_int8_t guid[sizeof(MDGUID)];
+    google_breakpad::FileID::ElfFileIdentifierFromMappedFile((void const *)library_mappings[i].start_address, guid);
+    gExceptionHandler->AddMappingInfo(library_mappings[i].name,
+                                      guid,
+                                      library_mappings[i].start_address,
+                                      library_mappings[i].length,
+                                      library_mappings[i].file_offset);
+  }
+#endif
+
+  mozalloc_set_oom_abort_handler(AnnotateOOMAllocationSize);
+
+  return NS_OK;
+}
+
+bool GetEnabled()
+{
+  return gExceptionHandler != nullptr;
+}
+
+bool GetMinidumpPath(nsAString& aPath)
+{
+  if (!gExceptionHandler)
+    return false;
+
+#ifndef XP_LINUX
+  aPath = CONVERT_XP_CHAR_TO_UTF16(gExceptionHandler->dump_path().c_str());
+#else
+  aPath = CONVERT_XP_CHAR_TO_UTF16(
+      gExceptionHandler->minidump_descriptor().directory().c_str());
+#endif
+  return true;
+}
+
+nsresult SetMinidumpPath(const nsAString& aPath)
+{
+  if (!gExceptionHandler)
+    return NS_ERROR_NOT_INITIALIZED;
+
+#ifdef XP_WIN32
+  gExceptionHandler->set_dump_path(char16ptr_t(aPath.BeginReading()));
+#elif defined(XP_LINUX)
+  gExceptionHandler->set_minidump_descriptor(
+      MinidumpDescriptor(NS_ConvertUTF16toUTF8(aPath).BeginReading()));
+#else
+  gExceptionHandler->set_dump_path(NS_ConvertUTF16toUTF8(aPath).BeginReading());
+#endif
+  return NS_OK;
+}
+
+static nsresult
+WriteDataToFile(nsIFile* aFile, const nsACString& data)
+{
+  PRFileDesc* fd;
+  nsresult rv = aFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE, 00600, &fd);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = NS_OK;
+  if (PR_Write(fd, data.Data(), data.Length()) == -1) {
+    rv = NS_ERROR_FAILURE;
+  }
+  PR_Close(fd);
+  return rv;
+}
+
+static nsresult
+GetFileContents(nsIFile* aFile, nsACString& data)
+{
+  PRFileDesc* fd;
+  nsresult rv = aFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = NS_OK;
+  int32_t filesize = PR_Available(fd);
+  if (filesize <= 0) {
+    rv = NS_ERROR_FILE_NOT_FOUND;
+  }
+  else {
+    data.SetLength(filesize);
+    if (PR_Read(fd, data.BeginWriting(), filesize) == -1) {
+      rv = NS_ERROR_FAILURE;
+    }
+  }
+  PR_Close(fd);
+  return rv;
+}
+
+// Function typedef for initializing a piece of data that we
+// don't already have.
+typedef nsresult (*InitDataFunc)(nsACString&);
+
+// Attempt to read aFile's contents into aContents, if aFile
+// does not exist, create it and initialize its contents
+// by calling aInitFunc for the data.
+static nsresult
+GetOrInit(nsIFile* aDir, const nsACString& filename,
+          nsACString& aContents, InitDataFunc aInitFunc)
+{
+  bool exists;
+
+  nsCOMPtr<nsIFile> dataFile;
+  nsresult rv = aDir->Clone(getter_AddRefs(dataFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = dataFile->AppendNative(filename);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = dataFile->Exists(&exists);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!exists) {
+    if (aInitFunc) {
+      // get the initial value and write it to the file
+      rv = aInitFunc(aContents);
+      NS_ENSURE_SUCCESS(rv, rv);
+      rv = WriteDataToFile(dataFile, aContents);
+    }
+    else {
+      // didn't pass in an init func
+      rv = NS_ERROR_FAILURE;
+    }
+  }
+  else {
+    // just get the file's contents
+    rv = GetFileContents(dataFile, aContents);
+  }
+
+  return rv;
+}
+
+// Init the "install time" data.  We're taking an easy way out here
+// and just setting this to "the time when this version was first run".
+static nsresult
+InitInstallTime(nsACString& aInstallTime)
+{
+  time_t t = time(nullptr);
+  char buf[16];
+  sprintf(buf, "%ld", t);
+  aInstallTime = buf;
+
+  return NS_OK;
+}
+
+// Ensure a directory exists and create it if missing.
+static nsresult
+EnsureDirectoryExists(nsIFile* dir)
+{
+  nsresult rv = dir->Create(nsIFile::DIRECTORY_TYPE, 0700);
+
+  if (NS_WARN_IF(NS_FAILED(rv) && rv != NS_ERROR_FILE_ALREADY_EXISTS)) {
+	return rv;
+  }
+
+  return NS_OK;
+}
+
+// Annotate the crash report with a Unique User ID and time
+// since install.  Also do some prep work for recording
+// time since last crash, which must be calculated at
+// crash time.
+// If any piece of data doesn't exist, initialize it first.
+nsresult SetupExtraData(nsIFile* aAppDataDirectory,
+                        const nsACString& aBuildID)
+{
+  nsCOMPtr<nsIFile> dataDirectory;
+  nsresult rv = aAppDataDirectory->Clone(getter_AddRefs(dataDirectory));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = dataDirectory->AppendNative(NS_LITERAL_CSTRING("Crash Reports"));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  EnsureDirectoryExists(dataDirectory);
+
+#if defined(XP_WIN32)
+  nsAutoString dataDirEnv(NS_LITERAL_STRING("MOZ_CRASHREPORTER_DATA_DIRECTORY="));
+
+  nsAutoString dataDirectoryPath;
+  rv = dataDirectory->GetPath(dataDirectoryPath);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  dataDirEnv.Append(dataDirectoryPath);
+
+  _wputenv(dataDirEnv.get());
+#else
+  // Save this path in the environment for the crash reporter application.
+  nsAutoCString dataDirEnv("MOZ_CRASHREPORTER_DATA_DIRECTORY=");
+
+  nsAutoCString dataDirectoryPath;
+  rv = dataDirectory->GetNativePath(dataDirectoryPath);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  dataDirEnv.Append(dataDirectoryPath);
+
+  char* env = ToNewCString(dataDirEnv);
+  NS_ENSURE_TRUE(env, NS_ERROR_OUT_OF_MEMORY);
+
+  PR_SetEnv(env);
+#endif
+
+  nsAutoCString data;
+  if(NS_SUCCEEDED(GetOrInit(dataDirectory,
+                            NS_LITERAL_CSTRING("InstallTime") + aBuildID,
+                            data, InitInstallTime)))
+    AnnotateCrashReport(NS_LITERAL_CSTRING("InstallTime"), data);
+
+  // this is a little different, since we can't init it with anything,
+  // since it's stored at crash time, and we can't annotate the
+  // crash report with the stored value, since we really want
+  // (now - LastCrash), so we just get a value if it exists,
+  // and store it in a time_t value.
+  if(NS_SUCCEEDED(GetOrInit(dataDirectory, NS_LITERAL_CSTRING("LastCrash"),
+                            data, nullptr))) {
+    lastCrashTime = (time_t)atol(data.get());
+  }
+
+  // not really the best place to init this, but I have the path I need here
+  nsCOMPtr<nsIFile> lastCrashFile;
+  rv = dataDirectory->Clone(getter_AddRefs(lastCrashFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = lastCrashFile->AppendNative(NS_LITERAL_CSTRING("LastCrash"));
+  NS_ENSURE_SUCCESS(rv, rv);
+  memset(lastCrashTimeFilename, 0, sizeof(lastCrashTimeFilename));
+
+#if defined(XP_WIN32)
+  nsAutoString filename;
+  rv = lastCrashFile->GetPath(filename);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (filename.Length() < XP_PATH_MAX)
+    wcsncpy(lastCrashTimeFilename, filename.get(), filename.Length());
+#else
+  nsAutoCString filename;
+  rv = lastCrashFile->GetNativePath(filename);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (filename.Length() < XP_PATH_MAX)
+    strncpy(lastCrashTimeFilename, filename.get(), filename.Length());
+#endif
+
+  if (headlessClient) {
+    nsCOMPtr<nsIFile> markerFile;
+    rv = dataDirectory->Clone(getter_AddRefs(markerFile));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = markerFile->AppendNative(NS_LITERAL_CSTRING("LastCrashFilename"));
+    NS_ENSURE_SUCCESS(rv, rv);
+    memset(crashMarkerFilename, 0, sizeof(crashMarkerFilename));
+
+#if defined(XP_WIN32)
+    nsAutoString markerFilename;
+    rv = markerFile->GetPath(markerFilename);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (markerFilename.Length() < XP_PATH_MAX)
+      wcsncpy(crashMarkerFilename, markerFilename.get(),
+              markerFilename.Length());
+#else
+    nsAutoCString markerFilename;
+    rv = markerFile->GetNativePath(markerFilename);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (markerFilename.Length() < XP_PATH_MAX)
+      strncpy(crashMarkerFilename, markerFilename.get(),
+              markerFilename.Length());
+#endif
+  }
+
+  return NS_OK;
+}
+
+static void OOPDeinit();
+
+nsresult UnsetExceptionHandler()
+{
+  if (isSafeToDump) {
+    MutexAutoLock lock(*dumpSafetyLock);
+    isSafeToDump = false;
+  }
+
+#ifdef XP_WIN
+  // allow SetUnhandledExceptionFilter
+  gBlockUnhandledExceptionFilter = false;
+#endif
+
+  delete gExceptionHandler;
+
+  // do this here in the unlikely case that we succeeded in allocating
+  // our strings but failed to allocate gExceptionHandler.
+  delete crashReporterAPIData_Hash;
+  crashReporterAPIData_Hash = nullptr;
+
+  delete crashReporterAPILock;
+  crashReporterAPILock = nullptr;
+
+  delete notesFieldLock;
+  notesFieldLock = nullptr;
+
+  delete crashReporterAPIData;
+  crashReporterAPIData = nullptr;
+
+  delete notesField;
+  notesField = nullptr;
+
+  delete lastRunCrashID;
+  lastRunCrashID = nullptr;
+
+  if (pendingDirectory) {
+    NS_Free(pendingDirectory);
+    pendingDirectory = nullptr;
+  }
+
+  if (crashReporterPath) {
+    NS_Free(crashReporterPath);
+    crashReporterPath = nullptr;
+  }
+
+  if (eventsDirectory) {
+    NS_Free(eventsDirectory);
+    eventsDirectory = nullptr;
+  }
+
+#ifdef XP_MACOSX
+  posix_spawnattr_destroy(&spawnattr);
+#endif
+
+  if (!gExceptionHandler)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  gExceptionHandler = nullptr;
+
+  OOPDeinit();
+
+  delete dumpSafetyLock;
+  dumpSafetyLock = nullptr;
+
+  return NS_OK;
+}
+
+static void ReplaceChar(nsCString& str, const nsACString& character,
+                        const nsACString& replacement)
+{
+  nsCString::const_iterator start, end;
+
+  str.BeginReading(start);
+  str.EndReading(end);
+
+  while (FindInReadable(character, start, end)) {
+    int32_t pos = end.size_backward();
+    str.Replace(pos - 1, 1, replacement);
+
+    str.BeginReading(start);
+    start.advance(pos + replacement.Length() - 1);
+    str.EndReading(end);
+  }
+}
+
+static bool DoFindInReadable(const nsACString& str, const nsACString& value)
+{
+  nsACString::const_iterator start, end;
+  str.BeginReading(start);
+  str.EndReading(end);
+
+  return FindInReadable(value, start, end);
+}
+
+static PLDHashOperator EnumerateEntries(const nsACString& key,
+                                        nsCString entry,
+                                        void* userData)
+{
+  crashReporterAPIData->Append(key + NS_LITERAL_CSTRING("=") + entry +
+                               NS_LITERAL_CSTRING("\n"));
+  return PL_DHASH_NEXT;
+}
+
+// This function is miscompiled with MSVC 2005/2008 when PGO is on.
+#ifdef _MSC_VER
+#pragma optimize("", off)
+#endif
+static nsresult
+EscapeAnnotation(const nsACString& key, const nsACString& data, nsCString& escapedData)
+{
+  if (DoFindInReadable(key, NS_LITERAL_CSTRING("=")) ||
+      DoFindInReadable(key, NS_LITERAL_CSTRING("\n")))
+    return NS_ERROR_INVALID_ARG;
+
+  if (DoFindInReadable(data, NS_LITERAL_CSTRING("\0")))
+    return NS_ERROR_INVALID_ARG;
+
+  escapedData = data;
+
+  // escape backslashes
+  ReplaceChar(escapedData, NS_LITERAL_CSTRING("\\"),
+              NS_LITERAL_CSTRING("\\\\"));
+  // escape newlines
+  ReplaceChar(escapedData, NS_LITERAL_CSTRING("\n"),
+              NS_LITERAL_CSTRING("\\n"));
+  return NS_OK;
+}
+#ifdef _MSC_VER
+#pragma optimize("", on)
+#endif
+
+class DelayedNote
+{
+ public:
+  DelayedNote(const nsACString& aKey, const nsACString& aData)
+  : mKey(aKey), mData(aData), mType(Annotation) {}
+
+  DelayedNote(const nsACString& aData)
+  : mData(aData), mType(AppNote) {}
+
+  void Run()
+  {
+    if (mType == Annotation) {
+      AnnotateCrashReport(mKey, mData);
+    } else {
+      AppendAppNotesToCrashReport(mData);
+    }
+  }
+  
+ private:
+  nsCString mKey;
+  nsCString mData;
+  enum AnnotationType { Annotation, AppNote } mType;
+};
+
+static void
+EnqueueDelayedNote(DelayedNote* aNote)
+{
+  if (!gDelayedAnnotations) {
+    gDelayedAnnotations = new nsTArray<nsAutoPtr<DelayedNote> >();
+  }
+  gDelayedAnnotations->AppendElement(aNote);
+}
+
+nsresult AnnotateCrashReport(const nsACString& key, const nsACString& data)
+{
+  if (!GetEnabled())
+    return NS_ERROR_NOT_INITIALIZED;
+
+  nsCString escapedData;
+  nsresult rv = EscapeAnnotation(key, data, escapedData);
+  if (NS_FAILED(rv))
+    return rv;
+
+  if (XRE_GetProcessType() != GeckoProcessType_Default) {
+    if (!NS_IsMainThread()) {
+      NS_ERROR("Cannot call AnnotateCrashReport in child processes from non-main thread.");
+      return NS_ERROR_FAILURE;
+    }
+    PCrashReporterChild* reporter = CrashReporterChild::GetCrashReporter();
+    if (!reporter) {
+      EnqueueDelayedNote(new DelayedNote(key, data));
+      return NS_OK;
+    }
+    if (!reporter->SendAnnotateCrashReport(nsCString(key), escapedData))
+      return NS_ERROR_FAILURE;
+    return NS_OK;
+  }
+
+  MutexAutoLock lock(*crashReporterAPILock);
+
+  crashReporterAPIData_Hash->Put(key, escapedData);
+
+  // now rebuild the file contents
+  crashReporterAPIData->Truncate(0);
+  crashReporterAPIData_Hash->EnumerateRead(EnumerateEntries,
+                                           crashReporterAPIData);
+
+  return NS_OK;
+}
+
+nsresult SetGarbageCollecting(bool collecting)
+{
+  if (!GetEnabled())
+    return NS_ERROR_NOT_INITIALIZED;
+
+  isGarbageCollecting = collecting;
+
+  return NS_OK;
+}
+
+void SetEventloopNestingLevel(uint32_t level)
+{
+  eventloopNestingLevel = level;
+}
+
+nsresult AppendAppNotesToCrashReport(const nsACString& data)
+{
+  if (!GetEnabled())
+    return NS_ERROR_NOT_INITIALIZED;
+
+  if (DoFindInReadable(data, NS_LITERAL_CSTRING("\0")))
+    return NS_ERROR_INVALID_ARG;
+
+  if (XRE_GetProcessType() != GeckoProcessType_Default) {
+    if (!NS_IsMainThread()) {
+      NS_ERROR("Cannot call AnnotateCrashReport in child processes from non-main thread.");
+      return NS_ERROR_FAILURE;
+    }
+    PCrashReporterChild* reporter = CrashReporterChild::GetCrashReporter();
+    if (!reporter) {
+      EnqueueDelayedNote(new DelayedNote(data));
+      return NS_OK;
+    }
+
+    // Since we don't go through AnnotateCrashReport in the parent process,
+    // we must ensure that the data is escaped and valid before the parent
+    // sees it.
+    nsCString escapedData;
+    nsresult rv = EscapeAnnotation(NS_LITERAL_CSTRING("Notes"), data, escapedData);
+    if (NS_FAILED(rv))
+      return rv;
+
+    if (!reporter->SendAppendAppNotes(escapedData))
+      return NS_ERROR_FAILURE;
+    return NS_OK;
+  }
+
+  MutexAutoLock lock(*notesFieldLock);
+
+  notesField->Append(data);
+  return AnnotateCrashReport(NS_LITERAL_CSTRING("Notes"), *notesField);
+}
+
+// Returns true if found, false if not found.
+bool GetAnnotation(const nsACString& key, nsACString& data)
+{
+  if (!gExceptionHandler)
+    return false;
+
+  nsAutoCString entry;
+  if (!crashReporterAPIData_Hash->Get(key, &entry))
+    return false;
+
+  data = entry;
+  return true;
+}
+
+nsresult RegisterAppMemory(void* ptr, size_t length)
+{
+  if (!GetEnabled())
+    return NS_ERROR_NOT_INITIALIZED;
+
+#if defined(XP_LINUX) || defined(XP_WIN32)
+  gExceptionHandler->RegisterAppMemory(ptr, length);
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif
+}
+
+nsresult UnregisterAppMemory(void* ptr)
+{
+  if (!GetEnabled())
+    return NS_ERROR_NOT_INITIALIZED;
+
+#if defined(XP_LINUX) || defined(XP_WIN32)
+  gExceptionHandler->UnregisterAppMemory(ptr);
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif
+}
+
+bool GetServerURL(nsACString& aServerURL)
+{
+  if (!gExceptionHandler)
+    return false;
+
+  return GetAnnotation(NS_LITERAL_CSTRING("ServerURL"), aServerURL);
+}
+
+nsresult SetServerURL(const nsACString& aServerURL)
+{
+  // store server URL with the API data
+  // the client knows to handle this specially
+  return AnnotateCrashReport(NS_LITERAL_CSTRING("ServerURL"),
+                             aServerURL);
+}
+
+nsresult
+SetRestartArgs(int argc, char** argv)
+{
+  if (!gExceptionHandler)
+    return NS_OK;
+
+  int i;
+  nsAutoCString envVar;
+  char *env;
+  char *argv0 = getenv("MOZ_APP_LAUNCHER");
+  for (i = 0; i < argc; i++) {
+    envVar = "MOZ_CRASHREPORTER_RESTART_ARG_";
+    envVar.AppendInt(i);
+    envVar += "=";
+    if (argv0 && i == 0) {
+      // Is there a request to suppress default binary launcher?
+      envVar += argv0;
+    } else {
+      envVar += argv[i];
+    }
+
+    // PR_SetEnv() wants the string to be available for the lifetime
+    // of the app, so dup it here
+    env = ToNewCString(envVar);
+    if (!env)
+      return NS_ERROR_OUT_OF_MEMORY;
+
+    PR_SetEnv(env);
+  }
+
+  // make sure the arg list is terminated
+  envVar = "MOZ_CRASHREPORTER_RESTART_ARG_";
+  envVar.AppendInt(i);
+  envVar += "=";
+
+  // PR_SetEnv() wants the string to be available for the lifetime
+  // of the app, so dup it here
+  env = ToNewCString(envVar);
+  if (!env)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  PR_SetEnv(env);
+
+  // make sure we save the info in XUL_APP_FILE for the reporter
+  const char *appfile = PR_GetEnv("XUL_APP_FILE");
+  if (appfile && *appfile) {
+    envVar = "MOZ_CRASHREPORTER_RESTART_XUL_APP_FILE=";
+    envVar += appfile;
+    env = ToNewCString(envVar);
+    PR_SetEnv(env);
+  }
+
+  return NS_OK;
+}
+
+#ifdef XP_WIN32
+nsresult WriteMinidumpForException(EXCEPTION_POINTERS* aExceptionInfo)
+{
+  if (!gExceptionHandler)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  return gExceptionHandler->WriteMinidumpForException(aExceptionInfo) ? NS_OK : NS_ERROR_FAILURE;
+}
+#endif
+
+#ifdef XP_LINUX
+bool WriteMinidumpForSigInfo(int signo, siginfo_t* info, void* uc)
+{
+  return gExceptionHandler->HandleSignal(signo, info, uc);
+}
+#endif
+
+#ifdef XP_MACOSX
+nsresult AppendObjCExceptionInfoToAppNotes(void *inException)
+{
+  nsAutoCString excString;
+  GetObjCExceptionInfo(inException, excString);
+  AppendAppNotesToCrashReport(excString);
+  return NS_OK;
+}
+#endif
+
+/*
+ * Combined code to get/set the crash reporter submission pref on
+ * different platforms.
+ */
+static nsresult PrefSubmitReports(bool* aSubmitReports, bool writePref)
+{
+  nsresult rv;
+#if defined(XP_WIN32)
+  /*
+   * NOTE! This needs to stay in sync with the preference checking code
+   *       in toolkit/crashreporter/client/crashreporter_win.cpp
+   */
+  nsCOMPtr<nsIXULAppInfo> appinfo =
+    do_GetService("@mozilla.org/xre/app-info;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoCString appVendor, appName;
+  rv = appinfo->GetVendor(appVendor);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = appinfo->GetName(appName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIWindowsRegKey> regKey
+    (do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoCString regPath;
+
+  regPath.AppendLiteral("Software\\");
+
+  // We need to ensure the registry keys are created so we can properly
+  // write values to it
+  
+  // Create appVendor key
+  if(!appVendor.IsEmpty()) {
+    regPath.Append(appVendor);
+    regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                   NS_ConvertUTF8toUTF16(regPath),
+                   nsIWindowsRegKey::ACCESS_SET_VALUE);
+    regPath.AppendLiteral("\\");
+  }
+
+  // Create appName key
+  regPath.Append(appName);
+  regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                 NS_ConvertUTF8toUTF16(regPath),
+                 nsIWindowsRegKey::ACCESS_SET_VALUE);
+  regPath.AppendLiteral("\\");
+
+  // Create Crash Reporter key
+  regPath.AppendLiteral("Crash Reporter");
+  regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                 NS_ConvertUTF8toUTF16(regPath),
+                 nsIWindowsRegKey::ACCESS_SET_VALUE);
+
+  // If we're saving the pref value, just write it to ROOT_KEY_CURRENT_USER
+  // and we're done.
+  if (writePref) {
+    rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                      NS_ConvertUTF8toUTF16(regPath),
+                      nsIWindowsRegKey::ACCESS_SET_VALUE);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    uint32_t value = *aSubmitReports ? 1 : 0;
+    rv = regKey->WriteIntValue(NS_LITERAL_STRING("SubmitCrashReport"), value);
+    regKey->Close();
+    return rv;
+  }
+
+  // We're reading the pref value, so we need to first look under
+  // ROOT_KEY_LOCAL_MACHINE to see if it's set there, and then fall back to
+  // ROOT_KEY_CURRENT_USER. If it's not set in either place, the pref defaults
+  // to "true".
+  uint32_t value;
+  rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE,
+                    NS_ConvertUTF8toUTF16(regPath),
+                    nsIWindowsRegKey::ACCESS_QUERY_VALUE);
+  if (NS_SUCCEEDED(rv)) {
+    rv = regKey->ReadIntValue(NS_LITERAL_STRING("SubmitCrashReport"), &value);
+    regKey->Close();
+    if (NS_SUCCEEDED(rv)) {
+      *aSubmitReports = !!value;
+      return NS_OK;
+    }
+  }
+
+  rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                    NS_ConvertUTF8toUTF16(regPath),
+                    nsIWindowsRegKey::ACCESS_QUERY_VALUE);
+  if (NS_FAILED(rv)) {
+    *aSubmitReports = true;
+    return NS_OK;
+  }
+  
+  rv = regKey->ReadIntValue(NS_LITERAL_STRING("SubmitCrashReport"), &value);
+  // default to true on failure
+  if (NS_FAILED(rv)) {
+    value = 1;
+    rv = NS_OK;
+  }
+  regKey->Close();
+
+  *aSubmitReports = !!value;
+  return NS_OK;
+#elif defined(XP_MACOSX)
+  rv = NS_OK;
+  if (writePref) {
+    CFPropertyListRef cfValue = (CFPropertyListRef)(*aSubmitReports ? kCFBooleanTrue : kCFBooleanFalse);
+    ::CFPreferencesSetAppValue(CFSTR("submitReport"),
+                               cfValue,
+                               reporterClientAppID);
+    if (!::CFPreferencesAppSynchronize(reporterClientAppID))
+      rv = NS_ERROR_FAILURE;
+  }
+  else {
+    *aSubmitReports = true;
+    Boolean keyExistsAndHasValidFormat = false;
+    Boolean prefValue = ::CFPreferencesGetAppBooleanValue(CFSTR("submitReport"),
+                                                          reporterClientAppID,
+                                                          &keyExistsAndHasValidFormat);
+    if (keyExistsAndHasValidFormat)
+      *aSubmitReports = !!prefValue;
+  }
+  return rv;
+#elif defined(XP_UNIX)
+  /*
+   * NOTE! This needs to stay in sync with the preference checking code
+   *       in toolkit/crashreporter/client/crashreporter_linux.cpp
+   */
+  nsCOMPtr<nsIFile> reporterINI;
+  rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(reporterINI));
+  NS_ENSURE_SUCCESS(rv, rv);
+  reporterINI->AppendNative(NS_LITERAL_CSTRING("Crash Reports"));
+  reporterINI->AppendNative(NS_LITERAL_CSTRING("crashreporter.ini"));
+
+  bool exists;
+  rv = reporterINI->Exists(&exists);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!exists) {
+    if (!writePref) {
+        // If reading the pref, default to true if .ini doesn't exist.
+        *aSubmitReports = true;
+        return NS_OK;
+    }
+    // Create the file so the INI processor can write to it.
+    rv = reporterINI->Create(nsIFile::NORMAL_FILE_TYPE, 0600);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsCOMPtr<nsIINIParserFactory> iniFactory =
+    do_GetService("@mozilla.org/xpcom/ini-processor-factory;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIINIParser> iniParser;
+  rv = iniFactory->CreateINIParser(reporterINI,
+                                   getter_AddRefs(iniParser));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // If we're writing the pref, just set and we're done.
+  if (writePref) {
+    nsCOMPtr<nsIINIParserWriter> iniWriter = do_QueryInterface(iniParser);
+    NS_ENSURE_TRUE(iniWriter, NS_ERROR_FAILURE);
+
+    rv = iniWriter->SetString(NS_LITERAL_CSTRING("Crash Reporter"),
+                              NS_LITERAL_CSTRING("SubmitReport"),
+                              *aSubmitReports ?  NS_LITERAL_CSTRING("1") :
+                                                 NS_LITERAL_CSTRING("0"));
+    NS_ENSURE_SUCCESS(rv, rv);
+    rv = iniWriter->WriteFile(nullptr, 0);
+    return rv;
+  }
+  
+  nsAutoCString submitReportValue;
+  rv = iniParser->GetString(NS_LITERAL_CSTRING("Crash Reporter"),
+                            NS_LITERAL_CSTRING("SubmitReport"),
+                            submitReportValue);
+
+  // Default to "true" if the pref can't be found.
+  if (NS_FAILED(rv))
+    *aSubmitReports = true;
+  else if (submitReportValue.EqualsASCII("0"))
+    *aSubmitReports = false;
+  else
+    *aSubmitReports = true;
+
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif
+}
+
+nsresult GetSubmitReports(bool* aSubmitReports)
+{
+    return PrefSubmitReports(aSubmitReports, false);
+}
+
+nsresult SetSubmitReports(bool aSubmitReports)
+{
+    nsresult rv;
+
+    nsCOMPtr<nsIObserverService> obsServ =
+      mozilla::services::GetObserverService();
+    if (!obsServ) {
+      return NS_ERROR_FAILURE;
+    }
+
+    rv = PrefSubmitReports(&aSubmitReports, true);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+
+    obsServ->NotifyObservers(nullptr, "submit-reports-pref-changed", nullptr);
+    return NS_OK;
+}
+
+void
+UpdateCrashEventsDir()
+{
+  nsCOMPtr<nsIFile> eventsDir;
+
+  // We prefer the following locations in order:
+  //
+  // 1. If environment variable is present, use it. We don't expect
+  //    the environment variable except for tests and other atypical setups.
+  // 2. Inside the profile directory.
+  // 3. Inside the user application data directory (no profile available).
+  // 4. A temporary directory (setup likely is invalid / application is buggy).
+  const char *env = PR_GetEnv("CRASHES_EVENTS_DIR");
+  if (env) {
+    eventsDir = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
+    if (!eventsDir) {
+      return;
+    }
+    eventsDir->InitWithNativePath(nsDependentCString(env));
+    EnsureDirectoryExists(eventsDir);
+  } else {
+    nsresult rv = NS_GetSpecialDirectory("ProfD", getter_AddRefs(eventsDir));
+    if (NS_SUCCEEDED(rv)) {
+      eventsDir->Append(NS_LITERAL_STRING("crashes"));
+      EnsureDirectoryExists(eventsDir);
+      eventsDir->Append(NS_LITERAL_STRING("events"));
+      EnsureDirectoryExists(eventsDir);
+    } else {
+      rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(eventsDir));
+      if (NS_SUCCEEDED(rv)) {
+        eventsDir->Append(NS_LITERAL_STRING("Crash Reports"));
+        EnsureDirectoryExists(eventsDir);
+        eventsDir->Append(NS_LITERAL_STRING("events"));
+        EnsureDirectoryExists(eventsDir);
+      } else {
+        NS_WARNING("Couldn't get the user appdata directory. Crash events may not be produced.");
+        return;
+      }
+    }
+  }
+
+#ifdef XP_WIN
+  nsString path;
+  eventsDir->GetPath(path);
+  eventsDirectory = reinterpret_cast<wchar_t*>(ToNewUnicode(path));
+#else
+  nsCString path;
+  eventsDir->GetNativePath(path);
+  eventsDirectory = ToNewCString(path);
+#endif
+}
+
+bool GetCrashEventsDir(nsAString& aPath)
+{
+  if (!eventsDirectory) {
+    return false;
+  }
+
+  aPath = CONVERT_XP_CHAR_TO_UTF16(eventsDirectory);
+  return true;
+}
+
+static void
+FindPendingDir()
+{
+  if (pendingDirectory)
+    return;
+
+  nsCOMPtr<nsIFile> pendingDir;
+  nsresult rv = NS_GetSpecialDirectory("UAppData", getter_AddRefs(pendingDir));
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Couldn't get the user appdata directory, crash dumps will go in an unusual location");
+  }
+  else {
+    pendingDir->Append(NS_LITERAL_STRING("Crash Reports"));
+    pendingDir->Append(NS_LITERAL_STRING("pending"));
+
+#ifdef XP_WIN
+    nsString path;
+    pendingDir->GetPath(path);
+    pendingDirectory = reinterpret_cast<wchar_t*>(ToNewUnicode(path));
+#else
+    nsCString path;
+    pendingDir->GetNativePath(path);
+    pendingDirectory = ToNewCString(path);
+#endif
+  }
+}
+
+// The "pending" dir is Crash Reports/pending, from which minidumps
+// can be submitted. Because this method may be called off the main thread,
+// we store the pending directory as a path.
+static bool
+GetPendingDir(nsIFile** dir)
+{
+  MOZ_ASSERT(OOPInitialized());
+  if (!pendingDirectory) {
+    return false;
+  }
+
+  nsCOMPtr<nsIFile> pending = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
+  if (!pending) {
+    NS_WARNING("Can't set up pending directory during shutdown.");
+    return false;
+  }
+#ifdef XP_WIN
+  pending->InitWithPath(nsDependentString(pendingDirectory));
+#else
+  pending->InitWithNativePath(nsDependentCString(pendingDirectory));
+#endif
+  pending.swap(*dir);
+  return true;
+}
+
+// The "limbo" dir is where minidumps go to wait for something else to
+// use them.  If we're |ShouldReport()|, then the "something else" is
+// a minidump submitter, and they're coming from the 
+// Crash Reports/pending/ dir.  Otherwise, we don't know what the
+// "somthing else" is, but the minidumps stay in [profile]/minidumps/
+// limbo.
+static bool
+GetMinidumpLimboDir(nsIFile** dir)
+{
+  if (ShouldReport()) {
+    return GetPendingDir(dir);
+  }
+  else {
+#ifndef XP_LINUX
+    CreateFileFromPath(gExceptionHandler->dump_path(), dir);
+#else
+    CreateFileFromPath(gExceptionHandler->minidump_descriptor().directory(),
+                       dir);
+#endif
+    return nullptr != *dir;
+  }
+}
+
+bool
+GetMinidumpForID(const nsAString& id, nsIFile** minidump)
+{
+  if (!GetMinidumpLimboDir(minidump))
+    return false;
+  (*minidump)->Append(id + NS_LITERAL_STRING(".dmp")); 
+  return true;
+}
+
+bool
+GetIDFromMinidump(nsIFile* minidump, nsAString& id)
+{
+  if (NS_SUCCEEDED(minidump->GetLeafName(id))) {
+    id.Replace(id.Length() - 4, 4, NS_LITERAL_STRING(""));
+    return true;
+  }
+  return false;
+}
+
+bool
+GetExtraFileForID(const nsAString& id, nsIFile** extraFile)
+{
+  if (!GetMinidumpLimboDir(extraFile))
+    return false;
+  (*extraFile)->Append(id + NS_LITERAL_STRING(".extra"));
+  return true;
+}
+
+bool
+GetExtraFileForMinidump(nsIFile* minidump, nsIFile** extraFile)
+{
+  nsAutoString leafName;
+  nsresult rv = minidump->GetLeafName(leafName);
+  if (NS_FAILED(rv))
+    return false;
+
+  nsCOMPtr<nsIFile> extraF;
+  rv = minidump->Clone(getter_AddRefs(extraF));
+  if (NS_FAILED(rv))
+    return false;
+
+  leafName.Replace(leafName.Length() - 3, 3,
+                   NS_LITERAL_STRING("extra"));
+  rv = extraF->SetLeafName(leafName);
+  if (NS_FAILED(rv))
+    return false;
+
+  *extraFile = nullptr;
+  extraF.swap(*extraFile);
+  return true;
+}
+
+bool
+AppendExtraData(const nsAString& id, const AnnotationTable& data)
+{
+  nsCOMPtr<nsIFile> extraFile;
+  if (!GetExtraFileForID(id, getter_AddRefs(extraFile)))
+    return false;
+  return AppendExtraData(extraFile, data);
+}
+
+//-----------------------------------------------------------------------------
+// Helpers for AppendExtraData()
+//
+struct Blacklist {
+  Blacklist() : mItems(nullptr), mLen(0) { }
+  Blacklist(const char** items, int len) : mItems(items), mLen(len) { }
+
+  bool Contains(const nsACString& key) const {
+    for (int i = 0; i < mLen; ++i)
+      if (key.EqualsASCII(mItems[i]))
+        return true;
+    return false;
+  }
+
+  const char** mItems;
+  const int mLen;
+};
+
+struct EnumerateAnnotationsContext {
+  const Blacklist& blacklist;
+  PRFileDesc* fd;
+};
+
+static void
+WriteAnnotation(PRFileDesc* fd, const nsACString& key, const nsACString& value)
+{
+  PR_Write(fd, key.BeginReading(), key.Length());
+  PR_Write(fd, "=", 1);
+  PR_Write(fd, value.BeginReading(), value.Length());
+  PR_Write(fd, "\n", 1);
+}
+
+static PLDHashOperator
+EnumerateAnnotations(const nsACString& key,
+                     nsCString entry,
+                     void* userData)
+{
+  EnumerateAnnotationsContext* ctx =
+    static_cast<EnumerateAnnotationsContext*>(userData);
+  const Blacklist& blacklist = ctx->blacklist;
+
+  // skip entries in the blacklist
+  if (blacklist.Contains(key))
+      return PL_DHASH_NEXT;
+
+  WriteAnnotation(ctx->fd, key, entry);
+
+  return PL_DHASH_NEXT;
+}
+
+static bool
+WriteExtraData(nsIFile* extraFile,
+               const AnnotationTable& data,
+               const Blacklist& blacklist,
+               bool writeCrashTime=false,
+               bool truncate=false)
+{
+  PRFileDesc* fd;
+  int truncOrAppend = truncate ? PR_TRUNCATE : PR_APPEND;
+  nsresult rv = 
+    extraFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE | truncOrAppend,
+                                0600, &fd);
+  if (NS_FAILED(rv))
+    return false;
+
+  EnumerateAnnotationsContext ctx = { blacklist, fd };
+  data.EnumerateRead(EnumerateAnnotations, &ctx);
+
+  if (writeCrashTime) {
+    time_t crashTime = time(nullptr);
+    char crashTimeString[32];
+    XP_TTOA(crashTime, crashTimeString, 10);
+
+    WriteAnnotation(fd,
+                    nsDependentCString("CrashTime"),
+                    nsDependentCString(crashTimeString));
+  }
+
+  PR_Close(fd);
+  return true;
+}
+
+bool
+AppendExtraData(nsIFile* extraFile, const AnnotationTable& data)
+{
+  return WriteExtraData(extraFile, data, Blacklist());
+}
+
+
+static bool
+WriteExtraForMinidump(nsIFile* minidump,
+                      const Blacklist& blacklist,
+                      nsIFile** extraFile)
+{
+  nsCOMPtr<nsIFile> extra;
+  if (!GetExtraFileForMinidump(minidump, getter_AddRefs(extra)))
+    return false;
+
+  if (!WriteExtraData(extra, *crashReporterAPIData_Hash,
+                      blacklist,
+                      true /*write crash time*/,
+                      true /*truncate*/))
+    return false;
+
+  *extraFile = nullptr;
+  extra.swap(*extraFile);
+
+  return true;
+}
+
+// It really only makes sense to call this function when
+// ShouldReport() is true.
+static bool
+MoveToPending(nsIFile* dumpFile, nsIFile* extraFile)
+{
+  nsCOMPtr<nsIFile> pendingDir;
+  if (!GetPendingDir(getter_AddRefs(pendingDir)))
+    return false;
+
+  if (NS_FAILED(dumpFile->MoveTo(pendingDir, EmptyString()))) {
+    return false;
+  }
+
+  if (extraFile && NS_FAILED(extraFile->MoveTo(pendingDir, EmptyString()))) {
+    return false;
+  }
+
+  return true;
+}
+
+static void
+OnChildProcessDumpRequested(void* aContext,
+#ifdef XP_MACOSX
+                            const ClientInfo& aClientInfo,
+                            const xpstring& aFilePath
+#else
+                            const ClientInfo* aClientInfo,
+                            const xpstring* aFilePath
+#endif
+                            )
+{
+  nsCOMPtr<nsIFile> minidump;
+  nsCOMPtr<nsIFile> extraFile;
+
+  // Hold the mutex until the current dump request is complete, to
+  // prevent UnsetExceptionHandler() from pulling the rug out from
+  // under us.
+  MutexAutoLock lock(*dumpSafetyLock);
+  if (!isSafeToDump)
+    return;
+
+  CreateFileFromPath(
+#ifdef XP_MACOSX
+                     aFilePath,
+#else
+                     *aFilePath,
+#endif
+                     getter_AddRefs(minidump));
+
+  if (!WriteExtraForMinidump(minidump,
+                             Blacklist(kSubprocessBlacklist,
+                                       ArrayLength(kSubprocessBlacklist)),
+                             getter_AddRefs(extraFile)))
+    return;
+
+  if (ShouldReport())
+    MoveToPending(minidump, extraFile);
+
+  {
+    uint32_t pid =
+#ifdef XP_MACOSX
+      aClientInfo.pid();
+#else
+      aClientInfo->pid();
+#endif
+
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+    bool runCallback;
+#endif
+    {
+      MutexAutoLock lock(*dumpMapLock);
+      ChildProcessData* pd = pidToMinidump->PutEntry(pid);
+      MOZ_ASSERT(!pd->minidump);
+      pd->minidump = minidump;
+      pd->sequence = ++crashSequence;
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+      runCallback = nullptr != pd->callback;
+#endif
+    }
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+    if (runCallback)
+      NS_DispatchToMainThread(new ReportInjectedCrash(pid));
+#endif
+  }
+}
+
+static bool
+OOPInitialized()
+{
+  return pidToMinidump != nullptr;
+}
+
+#ifdef XP_MACOSX
+static bool ChildFilter(void *context) {
+  mozilla::IOInterposer::Disable();
+  return true;
+}
+#endif
+
+void
+OOPInit()
+{
+  if (OOPInitialized())
+    return;
+
+  MOZ_ASSERT(NS_IsMainThread());
+
+  NS_ABORT_IF_FALSE(gExceptionHandler != nullptr,
+                    "attempt to initialize OOP crash reporter before in-process crashreporter!");
+
+#if defined(XP_WIN)
+  childCrashNotifyPipe =
+    PR_smprintf("\\\\.\\pipe\\gecko-crash-server-pipe.%i",
+                static_cast<int>(::GetCurrentProcessId()));
+
+  const std::wstring dumpPath = gExceptionHandler->dump_path();
+  crashServer = new CrashGenerationServer(
+    NS_ConvertASCIItoUTF16(childCrashNotifyPipe).get(),
+    nullptr,                    // default security attributes
+    nullptr, nullptr,           // we don't care about process connect here
+    OnChildProcessDumpRequested, nullptr,
+    nullptr, nullptr,           // we don't care about process exit here
+    nullptr, nullptr,           // we don't care about upload request here
+    true,                       // automatically generate dumps
+    &dumpPath);
+
+#elif defined(XP_LINUX)
+  if (!CrashGenerationServer::CreateReportChannel(&serverSocketFd,
+                                                  &clientSocketFd))
+    NS_RUNTIMEABORT("can't create crash reporter socketpair()");
+
+  const std::string dumpPath =
+      gExceptionHandler->minidump_descriptor().directory();
+  crashServer = new CrashGenerationServer(
+    serverSocketFd,
+    OnChildProcessDumpRequested, nullptr,
+    nullptr, nullptr,           // we don't care about process exit here
+    true,
+    &dumpPath);
+
+#elif defined(XP_MACOSX)
+  childCrashNotifyPipe =
+    PR_smprintf("gecko-crash-server-pipe.%i",
+                static_cast<int>(getpid()));
+  const std::string dumpPath = gExceptionHandler->dump_path();
+
+  crashServer = new CrashGenerationServer(
+    childCrashNotifyPipe,
+    ChildFilter,
+    nullptr,
+    OnChildProcessDumpRequested, nullptr,
+    nullptr, nullptr,
+    true, // automatically generate dumps
+    dumpPath);
+#endif
+
+  if (!crashServer->Start())
+    NS_RUNTIMEABORT("can't start crash reporter server()");
+
+  pidToMinidump = new ChildMinidumpMap();
+
+  dumpMapLock = new Mutex("CrashReporter::dumpMapLock");
+
+  FindPendingDir();
+  UpdateCrashEventsDir();
+}
+
+static void
+OOPDeinit()
+{
+  if (!OOPInitialized()) {
+    NS_WARNING("OOPDeinit() without successful OOPInit()");
+    return;
+  }
+
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+  if (sInjectorThread) {
+    sInjectorThread->Shutdown();
+    NS_RELEASE(sInjectorThread);
+  }
+#endif
+
+  delete crashServer;
+  crashServer = nullptr;
+
+  delete dumpMapLock;
+  dumpMapLock = nullptr;
+
+  delete pidToMinidump;
+  pidToMinidump = nullptr;
+
+#if defined(XP_WIN)
+  PR_Free(childCrashNotifyPipe);
+  childCrashNotifyPipe = nullptr;
+#endif
+}
+
+#if defined(XP_WIN) || defined(XP_MACOSX)
+// Parent-side API for children
+const char*
+GetChildNotificationPipe()
+{
+  if (!GetEnabled())
+    return kNullNotifyPipe;
+
+  MOZ_ASSERT(OOPInitialized());
+
+  return childCrashNotifyPipe;
+}
+#endif
+
+#ifdef MOZ_CRASHREPORTER_INJECTOR
+void
+InjectCrashReporterIntoProcess(DWORD processID, InjectorCrashCallback* cb)
+{
+  if (!GetEnabled())
+    return;
+
+  if (!OOPInitialized())
+    OOPInit();
+
+  if (!sInjectorThread) {
+    if (NS_FAILED(NS_NewThread(&sInjectorThread)))
+      return;
+  }
+
+  {
+    MutexAutoLock lock(*dumpMapLock);
+    ChildProcessData* pd = pidToMinidump->PutEntry(processID);
+    MOZ_ASSERT(!pd->minidump && !pd->callback);
+    pd->callback = cb;
+  }
+
+  nsCOMPtr<nsIRunnable> r = new InjectCrashRunnable(processID);
+  sInjectorThread->Dispatch(r, nsIEventTarget::DISPATCH_NORMAL);
+}
+
+NS_IMETHODIMP
+ReportInjectedCrash::Run()
+{
+  // Crash reporting may have been disabled after this method was dispatched
+  if (!OOPInitialized())
+    return NS_OK;
+
+  InjectorCrashCallback* cb;
+  {
+    MutexAutoLock lock(*dumpMapLock);
+    ChildProcessData* pd = pidToMinidump->GetEntry(mPID);
+    if (!pd || !pd->callback)
+      return NS_OK;
+
+    MOZ_ASSERT(pd->minidump);
+
+    cb = pd->callback;
+  }
+
+  cb->OnCrash(mPID);
+  return NS_OK;
+}
+
+void
+UnregisterInjectorCallback(DWORD processID)
+{
+  if (!OOPInitialized())
+    return;
+
+  MutexAutoLock lock(*dumpMapLock);
+  pidToMinidump->RemoveEntry(processID);
+}
+
+#endif // MOZ_CRASHREPORTER_INJECTOR
+
+bool
+CheckForLastRunCrash()
+{
+  if (lastRunCrashID)
+    return true;
+
+  // The exception handler callback leaves the filename of the
+  // last minidump in a known file.
+  nsCOMPtr<nsIFile> lastCrashFile;
+  CreateFileFromPath(crashMarkerFilename,
+                     getter_AddRefs(lastCrashFile));
+
+  bool exists;
+  if (NS_FAILED(lastCrashFile->Exists(&exists)) || !exists) {
+    return false;
+  }
+
+  nsAutoCString lastMinidump_contents;
+  if (NS_FAILED(GetFileContents(lastCrashFile, lastMinidump_contents))) {
+    return false;
+  }
+  lastCrashFile->Remove(false);
+
+#ifdef XP_WIN
+  // Ugly but effective.
+  nsDependentString lastMinidump(
+      reinterpret_cast<const char16_t*>(lastMinidump_contents.get()));
+#else
+  nsAutoCString lastMinidump = lastMinidump_contents;
+#endif
+  nsCOMPtr<nsIFile> lastMinidumpFile;
+  CreateFileFromPath(lastMinidump.get(),
+                     getter_AddRefs(lastMinidumpFile));
+
+  if (!lastMinidumpFile || NS_FAILED(lastMinidumpFile->Exists(&exists)) || !exists) {
+    return false;
+  }
+
+  nsCOMPtr<nsIFile> lastExtraFile;
+  if (!GetExtraFileForMinidump(lastMinidumpFile,
+                               getter_AddRefs(lastExtraFile))) {
+    return false;
+  }
+
+  FindPendingDir();
+
+  // Move {dump,extra} to pending folder
+  if (!MoveToPending(lastMinidumpFile, lastExtraFile)) {
+    return false;
+  }
+
+  lastRunCrashID = new nsString();
+  return GetIDFromMinidump(lastMinidumpFile, *lastRunCrashID);
+}
+
+bool
+GetLastRunCrashID(nsAString& id)
+{
+  if (!lastRunCrashID_checked) {
+    CheckForLastRunCrash();
+    lastRunCrashID_checked = true;
+  }
+
+  if (!lastRunCrashID) {
+    return false;
+  }
+
+  id = *lastRunCrashID;
+  return true;
+}
+
+#if defined(XP_WIN)
+// Child-side API
+bool
+SetRemoteExceptionHandler(const nsACString& crashPipe)
+{
+  // crash reporting is disabled
+  if (crashPipe.Equals(kNullNotifyPipe))
+    return true;
+
+  NS_ABORT_IF_FALSE(!gExceptionHandler, "crash client already init'd");
+
+  gExceptionHandler = new google_breakpad::
+    ExceptionHandler(L"",
+                     FPEFilter,
+                     nullptr,    // no minidump callback
+                     nullptr,    // no callback context
+                     google_breakpad::ExceptionHandler::HANDLER_ALL,
+                     MiniDumpNormal,
+                     NS_ConvertASCIItoUTF16(crashPipe).get(),
+                     nullptr);
+#ifdef XP_WIN
+  gExceptionHandler->set_handle_debug_exceptions(true);
+#endif
+
+  // we either do remote or nothing, no fallback to regular crash reporting
+  return gExceptionHandler->IsOutOfProcess();
+}
+
+//--------------------------------------------------
+#elif defined(XP_LINUX)
+
+// Parent-side API for children
+bool
+CreateNotificationPipeForChild(int* childCrashFd, int* childCrashRemapFd)
+{
+  if (!GetEnabled()) {
+    *childCrashFd = -1;
+    *childCrashRemapFd = -1;
+    return true;
+  }
+
+  MOZ_ASSERT(OOPInitialized());
+
+  *childCrashFd = clientSocketFd;
+  *childCrashRemapFd = kMagicChildCrashReportFd;
+
+  return true;
+}
+
+// Child-side API
+bool
+SetRemoteExceptionHandler()
+{
+  NS_ABORT_IF_FALSE(!gExceptionHandler, "crash client already init'd");
+
+#ifndef XP_LINUX
+  xpstring path = "";
+#else
+  // MinidumpDescriptor requires a non-empty path.
+  google_breakpad::MinidumpDescriptor path(".");
+#endif
+  gExceptionHandler = new google_breakpad::
+    ExceptionHandler(path,
+                     nullptr,    // no filter callback
+                     nullptr,    // no minidump callback
+                     nullptr,    // no callback context
+                     true,       // install signal handlers
+                     kMagicChildCrashReportFd);
+
+  if (gDelayedAnnotations) {
+    for (uint32_t i = 0; i < gDelayedAnnotations->Length(); i++) {
+      gDelayedAnnotations->ElementAt(i)->Run();
+    }
+    delete gDelayedAnnotations;
+  }
+
+  // we either do remote or nothing, no fallback to regular crash reporting
+  return gExceptionHandler->IsOutOfProcess();
+}
+
+//--------------------------------------------------
+#elif defined(XP_MACOSX)
+// Child-side API
+bool
+SetRemoteExceptionHandler(const nsACString& crashPipe)
+{
+  // crash reporting is disabled
+  if (crashPipe.Equals(kNullNotifyPipe))
+    return true;
+
+  NS_ABORT_IF_FALSE(!gExceptionHandler, "crash client already init'd");
+
+  gExceptionHandler = new google_breakpad::
+    ExceptionHandler("",
+                     Filter,
+                     nullptr,    // no minidump callback
+                     nullptr,    // no callback context
+                     true,       // install signal handlers
+                     crashPipe.BeginReading());
+
+  // we either do remote or nothing, no fallback to regular crash reporting
+  return gExceptionHandler->IsOutOfProcess();
+}
+#endif  // XP_WIN
+
+
+bool
+TakeMinidumpForChild(uint32_t childPid, nsIFile** dump, uint32_t* aSequence)
+{
+  if (!GetEnabled())
+    return false;
+
+  MutexAutoLock lock(*dumpMapLock);
+
+  ChildProcessData* pd = pidToMinidump->GetEntry(childPid);
+  if (!pd)
+    return false;
+
+  NS_IF_ADDREF(*dump = pd->minidump);
+  if (aSequence) {
+    *aSequence = pd->sequence;
+  }
+  
+  pidToMinidump->RemoveEntry(childPid);
+
+  return !!*dump;
+}
+
+//-----------------------------------------------------------------------------
+// CreatePairedMinidumps() and helpers
+//
+
+void
+RenameAdditionalHangMinidump(nsIFile* minidump, nsIFile* childMinidump,
+                           const nsACString& name)
+{
+  nsCOMPtr<nsIFile> directory;
+  childMinidump->GetParent(getter_AddRefs(directory));
+  if (!directory)
+    return;
+
+  nsAutoCString leafName;
+  childMinidump->GetNativeLeafName(leafName);
+
+  // turn "<id>.dmp" into "<id>-<name>.dmp
+  leafName.Insert(NS_LITERAL_CSTRING("-") + name, leafName.Length() - 4);
+
+  minidump->MoveToNative(directory, leafName);
+}
+
+static bool
+PairedDumpCallback(
+#ifdef XP_LINUX
+                   const MinidumpDescriptor& descriptor,
+#else
+                   const XP_CHAR* dump_path,
+                   const XP_CHAR* minidump_id,
+#endif
+                   void* context,
+#ifdef XP_WIN32
+                   EXCEPTION_POINTERS* /*unused*/,
+                   MDRawAssertionInfo* /*unused*/,
+#endif
+                   bool succeeded)
+{
+  nsCOMPtr<nsIFile>& minidump = *static_cast< nsCOMPtr<nsIFile>* >(context);
+
+  xpstring dump;
+#ifdef XP_LINUX
+  dump = descriptor.path();
+#else
+  dump = dump_path;
+  dump += XP_PATH_SEPARATOR;
+  dump += minidump_id;
+  dump += dumpFileExtension;
+#endif
+
+  CreateFileFromPath(dump, getter_AddRefs(minidump));
+  return true;
+}
+
+static bool
+PairedDumpCallbackExtra(
+#ifdef XP_LINUX
+                        const MinidumpDescriptor& descriptor,
+#else
+                        const XP_CHAR* dump_path,
+                        const XP_CHAR* minidump_id,
+#endif
+                        void* context,
+#ifdef XP_WIN32
+                        EXCEPTION_POINTERS* /*unused*/,
+                        MDRawAssertionInfo* /*unused*/,
+#endif
+                        bool succeeded)
+{
+  PairedDumpCallback(
+#ifdef XP_LINUX
+                     descriptor,
+#else
+                     dump_path, minidump_id,
+#endif
+                     context,
+#ifdef XP_WIN32
+                     nullptr, nullptr,
+#endif
+                     succeeded);
+
+  nsCOMPtr<nsIFile>& minidump = *static_cast< nsCOMPtr<nsIFile>* >(context);
+
+  nsCOMPtr<nsIFile> extra;
+  return WriteExtraForMinidump(minidump, Blacklist(), getter_AddRefs(extra));
+}
+
+ThreadId
+CurrentThreadId()
+{
+#if defined(XP_WIN)
+  return ::GetCurrentThreadId();
+#elif defined(XP_LINUX)
+  return sys_gettid();
+#elif defined(XP_MACOSX)
+  // Just return an index, since Mach ports can't be directly serialized
+  thread_act_port_array_t   threads_for_task;
+  mach_msg_type_number_t    thread_count;
+
+  if (task_threads(mach_task_self(), &threads_for_task, &thread_count))
+    return -1;
+
+  for (unsigned int i = 0; i < thread_count; ++i) {
+    if (threads_for_task[i] == mach_thread_self())
+      return i;
+  }
+  abort();
+#else
+#  error "Unsupported platform"
+#endif
+}
+
+#ifdef XP_MACOSX
+static mach_port_t
+GetChildThread(ProcessHandle childPid, ThreadId childBlamedThread)
+{
+  mach_port_t childThread = MACH_PORT_NULL;
+  thread_act_port_array_t   threads_for_task;
+  mach_msg_type_number_t    thread_count;
+
+  if (task_threads(childPid, &threads_for_task, &thread_count)
+      == KERN_SUCCESS && childBlamedThread < thread_count) {
+    childThread = threads_for_task[childBlamedThread];
+  }
+
+  return childThread;
+}
+#endif
+
+bool
+CreatePairedMinidumps(ProcessHandle childPid,
+                      ThreadId childBlamedThread,
+                      nsIFile** childDump)
+{
+  if (!GetEnabled())
+    return false;
+
+#ifdef XP_MACOSX
+  mach_port_t childThread = GetChildThread(childPid, childBlamedThread);
+#else
+  ThreadId childThread = childBlamedThread;
+#endif
+
+  xpstring dump_path;
+#ifndef XP_LINUX
+  dump_path = gExceptionHandler->dump_path();
+#else
+  dump_path = gExceptionHandler->minidump_descriptor().directory();
+#endif
+
+  // dump the child
+  nsCOMPtr<nsIFile> childMinidump;
+  if (!google_breakpad::ExceptionHandler::WriteMinidumpForChild(
+         childPid,
+         childThread,
+         dump_path,
+         PairedDumpCallbackExtra,
+         static_cast<void*>(&childMinidump)))
+    return false;
+
+  nsCOMPtr<nsIFile> childExtra;
+  GetExtraFileForMinidump(childMinidump, getter_AddRefs(childExtra));
+
+  // dump the parent
+  nsCOMPtr<nsIFile> parentMinidump;
+  if (!google_breakpad::ExceptionHandler::WriteMinidump(
+         dump_path,
+#ifdef XP_MACOSX
+         true,                  // write exception stream
+#endif
+         PairedDumpCallback,
+         static_cast<void*>(&parentMinidump))) {
+
+    childMinidump->Remove(false);
+    childExtra->Remove(false);
+
+    return false;
+  }
+
+  // success
+  RenameAdditionalHangMinidump(parentMinidump, childMinidump,
+                               NS_LITERAL_CSTRING("browser"));
+
+  if (ShouldReport()) {
+    MoveToPending(childMinidump, childExtra);
+    MoveToPending(parentMinidump, nullptr);
+  }
+
+  childMinidump.forget(childDump);
+
+  return true;
+}
+
+bool
+CreateAdditionalChildMinidump(ProcessHandle childPid,
+                              ThreadId childBlamedThread,
+                              nsIFile* parentMinidump,
+                              const nsACString& name)
+{
+  if (!GetEnabled())
+    return false;
+
+#ifdef XP_MACOSX
+  mach_port_t childThread = GetChildThread(childPid, childBlamedThread);
+#else
+  ThreadId childThread = childBlamedThread;
+#endif
+
+  xpstring dump_path;
+#ifndef XP_LINUX
+  dump_path = gExceptionHandler->dump_path();
+#else
+  dump_path = gExceptionHandler->minidump_descriptor().directory();
+#endif
+
+  // dump the child
+  nsCOMPtr<nsIFile> childMinidump;
+  if (!google_breakpad::ExceptionHandler::WriteMinidumpForChild(
+         childPid,
+         childThread,
+         dump_path,
+         PairedDumpCallback,
+         static_cast<void*>(&childMinidump))) {
+    return false;
+  }
+
+  RenameAdditionalHangMinidump(childMinidump, parentMinidump, name);
+
+  return true;
+}
+
+bool
+UnsetRemoteExceptionHandler()
+{
+  delete gExceptionHandler;
+  gExceptionHandler = nullptr;
+  return true;
+}
+
+#if defined(MOZ_WIDGET_ANDROID)
+void AddLibraryMapping(const char* library_name,
+                       uintptr_t   start_address,
+                       size_t      mapping_length,
+                       size_t      file_offset)
+{
+  if (!gExceptionHandler) {
+    mapping_info info;
+    info.name = library_name;
+    info.start_address = start_address;
+    info.length = mapping_length;
+    info.file_offset = file_offset;
+    library_mappings.push_back(info);
+  }
+  else {
+    u_int8_t guid[sizeof(MDGUID)];
+    google_breakpad::FileID::ElfFileIdentifierFromMappedFile((void const *)start_address, guid);
+    gExceptionHandler->AddMappingInfo(library_name,
+                                      guid,
+                                      start_address,
+                                      mapping_length,
+                                      file_offset);
+  }
+}
+#endif
+
+} // namespace CrashReporter