Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1685 insertions, 0 deletions

diff --git a/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.cc b/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.cc
new file mode 100644
index 0000000000..281593e4b4
--- /dev/null
+++ b/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.cc
@@ -0,0 +1,1121 @@
+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <objbase.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstdio>
+
+#include "common/windows/string_utils-inl.h"
+
+#include "windows/common/ipc_protocol.h"
+#include "windows/handler/exception_handler.h"
+#include "common/windows/guid_string.h"
+
+#ifdef MOZ_PHC
+#include "replace_malloc_bridge.h"
+#endif
+
+namespace google_breakpad {
+
+// This define is new to Windows 10.
+#ifndef DBG_PRINTEXCEPTION_WIDE_C
+#define DBG_PRINTEXCEPTION_WIDE_C ((DWORD)0x4001000A)
+#endif
+
+vector<ExceptionHandler*>* ExceptionHandler::handler_stack_ = NULL;
+LONG ExceptionHandler::handler_stack_index_ = 0;
+CRITICAL_SECTION ExceptionHandler::handler_stack_critical_section_;
+volatile LONG ExceptionHandler::instance_count_ = 0;
+
+ExceptionHandler::ExceptionHandler(const wstring& dump_path,
+                                   FilterCallback filter,
+                                   MinidumpCallback callback,
+                                   void* callback_context,
+                                   int handler_types,
+                                   MINIDUMP_TYPE dump_type,
+                                   const wchar_t* pipe_name,
+                                   const CustomClientInfo* custom_info) {
+  Initialize(dump_path,
+             filter,
+             callback,
+             callback_context,
+             handler_types,
+             dump_type,
+             pipe_name,
+             NULL,  // pipe_handle
+             NULL,  // crash_generation_client
+             custom_info);
+}
+
+ExceptionHandler::ExceptionHandler(const wstring& dump_path,
+                                   FilterCallback filter,
+                                   MinidumpCallback callback,
+                                   void* callback_context,
+                                   int handler_types,
+                                   MINIDUMP_TYPE dump_type,
+                                   HANDLE pipe_handle,
+                                   const CustomClientInfo* custom_info) {
+  Initialize(dump_path,
+             filter,
+             callback,
+             callback_context,
+             handler_types,
+             dump_type,
+             NULL,  // pipe_name
+             pipe_handle,
+             NULL,  // crash_generation_client
+             custom_info);
+}
+
+ExceptionHandler::ExceptionHandler(
+    const wstring& dump_path,
+    FilterCallback filter,
+    MinidumpCallback callback,
+    void* callback_context,
+    int handler_types,
+    CrashGenerationClient* crash_generation_client) {
+  // The dump_type, pipe_name and custom_info that are passed in to Initialize()
+  // are not used.  The ones set in crash_generation_client are used instead.
+  Initialize(dump_path,
+             filter,
+             callback,
+             callback_context,
+             handler_types,
+             MiniDumpNormal,           // dump_type - not used
+             NULL,                     // pipe_name - not used
+             NULL,                     // pipe_handle
+             crash_generation_client,
+             NULL);                    // custom_info - not used
+}
+
+ExceptionHandler::ExceptionHandler(const wstring &dump_path,
+                                   FilterCallback filter,
+                                   MinidumpCallback callback,
+                                   void* callback_context,
+                                   int handler_types) {
+  Initialize(dump_path,
+             filter,
+             callback,
+             callback_context,
+             handler_types,
+             MiniDumpNormal,
+             NULL,   // pipe_name
+             NULL,   // pipe_handle
+             NULL,   // crash_generation_client
+             NULL);  // custom_info
+}
+
+void ExceptionHandler::Initialize(
+    const wstring& dump_path,
+    FilterCallback filter,
+    MinidumpCallback callback,
+    void* callback_context,
+    int handler_types,
+    MINIDUMP_TYPE dump_type,
+    const wchar_t* pipe_name,
+    HANDLE pipe_handle,
+    CrashGenerationClient* crash_generation_client,
+    const CustomClientInfo* custom_info) {
+  LONG instance_count = InterlockedIncrement(&instance_count_);
+  filter_ = filter;
+  callback_ = callback;
+  callback_context_ = callback_context;
+  dump_path_c_ = NULL;
+  next_minidump_id_c_ = NULL;
+  next_minidump_path_c_ = NULL;
+  dbghelp_module_ = NULL;
+  minidump_write_dump_ = NULL;
+  dump_type_ = dump_type;
+  rpcrt4_module_ = NULL;
+  uuid_create_ = NULL;
+  handler_types_ = handler_types;
+  previous_filter_ = NULL;
+#if _MSC_VER >= 1400  // MSVC 2005/8
+  previous_iph_ = NULL;
+#endif  // _MSC_VER >= 1400
+  previous_pch_ = NULL;
+  heap_corruption_veh_ = NULL;
+  handler_thread_ = NULL;
+  is_shutdown_ = false;
+  handler_start_semaphore_ = NULL;
+  handler_finish_semaphore_ = NULL;
+  requesting_thread_id_ = 0;
+  exception_info_ = NULL;
+  assertion_ = NULL;
+  handler_return_value_ = MinidumpResult::Failure;
+  handle_debug_exceptions_ = false;
+  consume_invalid_handle_exceptions_ = false;
+
+  // Attempt to use out-of-process if user has specified a pipe or a
+  // crash generation client.
+  scoped_ptr<CrashGenerationClient> client;
+  if (crash_generation_client) {
+    client.reset(crash_generation_client);
+  } else if (pipe_name) {
+    client.reset(
+      new CrashGenerationClient(pipe_name, dump_type_, custom_info));
+  } else if (pipe_handle) {
+    client.reset(
+      new CrashGenerationClient(pipe_handle, dump_type_, custom_info));
+  }
+
+  if (client.get() != NULL) {
+    // If successful in registering with the monitoring process,
+    // there is no need to setup in-process crash generation.
+    if (client->Register()) {
+      crash_generation_client_.reset(client.release());
+    }
+  }
+
+  if (!IsOutOfProcess()) {
+    // Either client did not ask for out-of-process crash generation
+    // or registration with the server process failed. In either case,
+    // setup to do in-process crash generation.
+
+    // Set synchronization primitives and the handler thread.  Each
+    // ExceptionHandler object gets its own handler thread because that's the
+    // only way to reliably guarantee sufficient stack space in an exception,
+    // and it allows an easy way to get a snapshot of the requesting thread's
+    // context outside of an exception.
+    InitializeCriticalSection(&handler_critical_section_);
+    handler_start_semaphore_ = CreateSemaphore(NULL, 0, 1, NULL);
+    assert(handler_start_semaphore_ != NULL);
+
+    handler_finish_semaphore_ = CreateSemaphore(NULL, 0, 1, NULL);
+    assert(handler_finish_semaphore_ != NULL);
+
+    // Don't attempt to create the thread if we could not create the semaphores.
+    if (handler_finish_semaphore_ != NULL && handler_start_semaphore_ != NULL) {
+      DWORD thread_id;
+      const int kExceptionHandlerThreadInitialStackSize = 64 * 1024;
+      handler_thread_ = CreateThread(NULL,         // lpThreadAttributes
+                                     kExceptionHandlerThreadInitialStackSize,
+                                     ExceptionHandlerThreadMain,
+                                     this,         // lpParameter
+                                     0,            // dwCreationFlags
+                                     &thread_id);
+      assert(handler_thread_ != NULL);
+    }
+
+    dbghelp_module_ = LoadLibrary(L"dbghelp.dll");
+    if (dbghelp_module_) {
+      minidump_write_dump_ = reinterpret_cast<MiniDumpWriteDump_type>(
+          GetProcAddress(dbghelp_module_, "MiniDumpWriteDump"));
+    }
+
+    // Load this library dynamically to not affect existing projects.  Most
+    // projects don't link against this directly, it's usually dynamically
+    // loaded by dependent code.
+    rpcrt4_module_ = LoadLibrary(L"rpcrt4.dll");
+    if (rpcrt4_module_) {
+      uuid_create_ = reinterpret_cast<UuidCreate_type>(
+          GetProcAddress(rpcrt4_module_, "UuidCreate"));
+    }
+
+    // set_dump_path calls UpdateNextID.  This sets up all of the path and id
+    // strings, and their equivalent c_str pointers.
+    set_dump_path(dump_path);
+  }
+
+  // Reserve one element for the instruction memory
+  AppMemory instruction_memory;
+  instruction_memory.ptr = NULL;
+  instruction_memory.length = 0;
+  instruction_memory.preallocated = true;
+  app_memory_info_.push_back(instruction_memory);
+
+  // There is a race condition here. If the first instance has not yet
+  // initialized the critical section, the second (and later) instances may
+  // try to use uninitialized critical section object. The feature of multiple
+  // instances in one module is not used much, so leave it as is for now.
+  // One way to solve this in the current design (that is, keeping the static
+  // handler stack) is to use spin locks with volatile bools to synchronize
+  // the handler stack. This works only if the compiler guarantees to generate
+  // cache coherent code for volatile.
+  // TODO(munjal): Fix this in a better way by changing the design if possible.
+
+  // Lazy initialization of the handler_stack_critical_section_
+  if (instance_count == 1) {
+    InitializeCriticalSection(&handler_stack_critical_section_);
+  }
+
+  if (handler_types != HANDLER_NONE) {
+    EnterCriticalSection(&handler_stack_critical_section_);
+
+    // The first time an ExceptionHandler that installs a handler is
+    // created, set up the handler stack.
+    if (!handler_stack_) {
+      handler_stack_ = new vector<ExceptionHandler*>();
+    }
+    handler_stack_->push_back(this);
+
+    if (handler_types & HANDLER_EXCEPTION)
+      previous_filter_ = SetUnhandledExceptionFilter(HandleException);
+
+#if _MSC_VER >= 1400  // MSVC 2005/8
+    if (handler_types & HANDLER_INVALID_PARAMETER)
+      previous_iph_ = _set_invalid_parameter_handler(HandleInvalidParameter);
+#endif  // _MSC_VER >= 1400
+
+    if (handler_types & HANDLER_PURECALL)
+      previous_pch_ = _set_purecall_handler(HandlePureVirtualCall);
+
+    if (handler_types & HANDLER_HEAP_CORRUPTION) {
+      // Under ASan we need to let the ASan runtime's ShadowExceptionHandler stay
+      // in the first handler position.
+#ifdef MOZ_ASAN
+      const bool first = false;
+#else
+      const bool first = true;
+#endif // MOZ_ASAN
+      heap_corruption_veh_ =
+          AddVectoredExceptionHandler(first, HandleHeapCorruption);
+    }
+
+    LeaveCriticalSection(&handler_stack_critical_section_);
+  }
+
+  include_context_heap_ = false;
+}
+
+ExceptionHandler::~ExceptionHandler() {
+  if (handler_types_ != HANDLER_NONE) {
+    EnterCriticalSection(&handler_stack_critical_section_);
+
+    if (handler_types_ & HANDLER_EXCEPTION)
+      SetUnhandledExceptionFilter(previous_filter_);
+
+#if _MSC_VER >= 1400  // MSVC 2005/8
+    if (handler_types_ & HANDLER_INVALID_PARAMETER)
+      _set_invalid_parameter_handler(previous_iph_);
+#endif  // _MSC_VER >= 1400
+
+    if (handler_types_ & HANDLER_PURECALL)
+      _set_purecall_handler(previous_pch_);
+
+    if (handler_types_ & HANDLER_HEAP_CORRUPTION)
+      RemoveVectoredExceptionHandler(heap_corruption_veh_);
+
+    if (handler_stack_->back() == this) {
+      handler_stack_->pop_back();
+    } else {
+      // TODO(mmentovai): use advapi32!ReportEvent to log the warning to the
+      // system's application event log.
+      fprintf(stderr, "warning: removing Breakpad handler out of order\n");
+      vector<ExceptionHandler*>::iterator iterator = handler_stack_->begin();
+      while (iterator != handler_stack_->end()) {
+        if (*iterator == this) {
+          iterator = handler_stack_->erase(iterator);
+        } else {
+          ++iterator;
+        }
+      }
+    }
+
+    if (handler_stack_->empty()) {
+      // When destroying the last ExceptionHandler that installed a handler,
+      // clean up the handler stack.
+      delete handler_stack_;
+      handler_stack_ = NULL;
+    }
+
+    LeaveCriticalSection(&handler_stack_critical_section_);
+  }
+
+  // Some of the objects were only initialized if out of process
+  // registration was not done.
+  if (!IsOutOfProcess()) {
+#ifdef BREAKPAD_NO_TERMINATE_THREAD
+    // Clean up the handler thread and synchronization primitives. The handler
+    // thread is either waiting on the semaphore to handle a crash or it is
+    // handling a crash. Coming out of the wait is fast but wait more in the
+    // eventuality a crash is handled.  This compilation option results in a
+    // deadlock if the exception handler is destroyed while executing code
+    // inside DllMain.
+    is_shutdown_ = true;
+    ReleaseSemaphore(handler_start_semaphore_, 1, NULL);
+    const int kWaitForHandlerThreadMs = 60000;
+    WaitForSingleObject(handler_thread_, kWaitForHandlerThreadMs);
+#else
+    TerminateThread(handler_thread_, 1);
+#endif  // BREAKPAD_NO_TERMINATE_THREAD
+
+    CloseHandle(handler_thread_);
+    handler_thread_ = NULL;
+    DeleteCriticalSection(&handler_critical_section_);
+    CloseHandle(handler_start_semaphore_);
+    CloseHandle(handler_finish_semaphore_);
+  }
+
+  // There is a race condition in the code below: if this instance is
+  // deleting the static critical section and a new instance of the class
+  // is created, then there is a possibility that the critical section be
+  // initialized while the same critical section is being deleted. Given the
+  // usage pattern for the code, this race condition is unlikely to hit, but it
+  // is a race condition nonetheless.
+  if (InterlockedDecrement(&instance_count_) == 0) {
+    DeleteCriticalSection(&handler_stack_critical_section_);
+  }
+
+  // The exception handler is not set anymore and the handler thread which
+  // could call MiniDumpWriteDump() has been shut down; it is now safe to
+  // unload these modules.
+  if (dbghelp_module_) {
+    FreeLibrary(dbghelp_module_);
+  }
+
+  if (rpcrt4_module_) {
+    FreeLibrary(rpcrt4_module_);
+  }
+}
+
+bool ExceptionHandler::RequestUpload(DWORD crash_id) {
+  return crash_generation_client_->RequestUpload(crash_id);
+}
+
+// The SetThreadDescription API was brought in version 1607 of Windows 10.
+typedef HRESULT(WINAPI* SetThreadDescriptionPtr)(HANDLE hThread,
+                                                 PCWSTR lpThreadDescription);
+
+// static
+DWORD ExceptionHandler::ExceptionHandlerThreadMain(void* lpParameter) {
+  HMODULE handle = ::GetModuleHandle(L"Kernel32.dll");
+  if (handle) {
+    if (FARPROC address = ::GetProcAddress(handle, "SetThreadDescription")) {
+      auto SetThreadDescriptionFunc =
+        reinterpret_cast<SetThreadDescriptionPtr>(address);
+      SetThreadDescriptionFunc(::GetCurrentThread(),
+                               L"Breakpad ExceptionHandler");
+    }
+  }
+
+  ExceptionHandler* self = reinterpret_cast<ExceptionHandler *>(lpParameter);
+  assert(self);
+  assert(self->handler_start_semaphore_ != NULL);
+  assert(self->handler_finish_semaphore_ != NULL);
+
+  for (;;) {
+    if (WaitForSingleObject(self->handler_start_semaphore_, INFINITE) ==
+        WAIT_OBJECT_0) {
+      // Perform the requested action.
+      if (self->is_shutdown_) {
+        // The instance of the exception handler is being destroyed.
+        break;
+      } else {
+        self->handler_return_value_ =
+            self->WriteMinidumpWithException(self->requesting_thread_id_,
+                                             self->exception_info_,
+                                             self->assertion_);
+      }
+
+      // Allow the requesting thread to proceed.
+      ReleaseSemaphore(self->handler_finish_semaphore_, 1, NULL);
+    }
+  }
+
+  // This statement is not reached when the thread is unconditionally
+  // terminated by the ExceptionHandler destructor.
+  return 0;
+}
+
+// HandleException and HandleInvalidParameter must create an
+// AutoExceptionHandler object to maintain static state and to determine which
+// ExceptionHandler instance to use.  The constructor locates the correct
+// instance, and makes it available through get_handler().  The destructor
+// restores the state in effect prior to allocating the AutoExceptionHandler.
+class AutoExceptionHandler {
+ public:
+  AutoExceptionHandler() {
+    // Increment handler_stack_index_ so that if another Breakpad handler is
+    // registered using this same HandleException function, and it needs to be
+    // called while this handler is running (either because this handler
+    // declines to handle the exception, or an exception occurs during
+    // handling), HandleException will find the appropriate ExceptionHandler
+    // object in handler_stack_ to deliver the exception to.
+    //
+    // Because handler_stack_ is addressed in reverse (as |size - index|),
+    // preincrementing handler_stack_index_ avoids needing to subtract 1 from
+    // the argument to |at|.
+    //
+    // The index is maintained instead of popping elements off of the handler
+    // stack and pushing them at the end of this method.  This avoids ruining
+    // the order of elements in the stack in the event that some other thread
+    // decides to manipulate the handler stack (such as creating a new
+    // ExceptionHandler object) while an exception is being handled.
+    EnterCriticalSection(&ExceptionHandler::handler_stack_critical_section_);
+    handler_ = ExceptionHandler::handler_stack_->at(
+        ExceptionHandler::handler_stack_->size() -
+        ++ExceptionHandler::handler_stack_index_);
+
+    // In case another exception occurs while this handler is doing its thing,
+    // it should be delivered to the previous filter.
+    SetUnhandledExceptionFilter(handler_->previous_filter_);
+#if _MSC_VER >= 1400  // MSVC 2005/8
+    _set_invalid_parameter_handler(handler_->previous_iph_);
+#endif  // _MSC_VER >= 1400
+    _set_purecall_handler(handler_->previous_pch_);
+  }
+
+  ~AutoExceptionHandler() {
+    // Put things back the way they were before entering this handler.
+    SetUnhandledExceptionFilter(ExceptionHandler::HandleException);
+#if _MSC_VER >= 1400  // MSVC 2005/8
+    _set_invalid_parameter_handler(ExceptionHandler::HandleInvalidParameter);
+#endif  // _MSC_VER >= 1400
+    _set_purecall_handler(ExceptionHandler::HandlePureVirtualCall);
+
+    --ExceptionHandler::handler_stack_index_;
+    LeaveCriticalSection(&ExceptionHandler::handler_stack_critical_section_);
+  }
+
+  ExceptionHandler* get_handler() const { return handler_; }
+
+ private:
+  ExceptionHandler* handler_;
+};
+
+// static
+LONG ExceptionHandler::HandleException(EXCEPTION_POINTERS* exinfo) {
+  AutoExceptionHandler auto_exception_handler;
+  ExceptionHandler* current_handler = auto_exception_handler.get_handler();
+
+  // Ignore EXCEPTION_BREAKPOINT and EXCEPTION_SINGLE_STEP exceptions.  This
+  // logic will short-circuit before calling WriteMinidumpOnHandlerThread,
+  // allowing something else to handle the breakpoint without incurring the
+  // overhead transitioning to and from the handler thread.  This behavior
+  // can be overridden by calling ExceptionHandler::set_handle_debug_exceptions.
+  DWORD code = exinfo->ExceptionRecord->ExceptionCode;
+  LONG action;
+  bool is_debug_exception = (code == EXCEPTION_BREAKPOINT) ||
+                            (code == EXCEPTION_SINGLE_STEP) ||
+                            (code == DBG_PRINTEXCEPTION_C) ||
+                            (code == DBG_PRINTEXCEPTION_WIDE_C);
+
+  if (code == EXCEPTION_INVALID_HANDLE &&
+      current_handler->consume_invalid_handle_exceptions_) {
+    return EXCEPTION_CONTINUE_EXECUTION;
+  }
+
+  MinidumpResult result = MinidumpResult::Failure;
+
+  if (!is_debug_exception ||
+      current_handler->get_handle_debug_exceptions()) {
+    // If out-of-proc crash handler client is available, we have to use that
+    // to generate dump and we cannot fall back on in-proc dump generation
+    // because we never prepared for an in-proc dump generation
+
+    // In case of out-of-process dump generation, directly call
+    // WriteMinidumpWithException since there is no separate thread running.
+    if (current_handler->IsOutOfProcess()) {
+      result = current_handler->WriteMinidumpWithException(
+          GetCurrentThreadId(),
+          exinfo,
+          NULL);
+    } else {
+      result = current_handler->WriteMinidumpOnHandlerThread(exinfo, NULL)
+             ? MinidumpResult::Success : MinidumpResult::Failure;
+    }
+  }
+
+  // The handler fully handled the exception.  Returning
+  // EXCEPTION_EXECUTE_HANDLER indicates this to the system, and usually
+  // results in the application being terminated.
+  //
+  // Note: If the application was launched from within the Cygwin
+  // environment, returning EXCEPTION_EXECUTE_HANDLER seems to cause the
+  // application to be restarted.
+  if ((result == MinidumpResult::Success) ||
+      (result == MinidumpResult::Ignored)) {
+    action = EXCEPTION_EXECUTE_HANDLER;
+  } else {
+    // There was an exception, it was a breakpoint or something else ignored
+    // above, or it was passed to the handler, which decided not to handle it.
+    // This could be because the filter callback didn't want it, because
+    // minidump writing failed for some reason, or because the post-minidump
+    // callback function indicated failure.  Give the previous handler a
+    // chance to do something with the exception.  If there is no previous
+    // handler, return EXCEPTION_CONTINUE_SEARCH, which will allow a debugger
+    // or native "crashed" dialog to handle the exception.
+    if (current_handler->previous_filter_) {
+      action = current_handler->previous_filter_(exinfo);
+    } else {
+      action = EXCEPTION_CONTINUE_SEARCH;
+    }
+  }
+
+  return action;
+}
+
+#if _MSC_VER >= 1400  // MSVC 2005/8
+// static
+void ExceptionHandler::HandleInvalidParameter(const wchar_t* expression,
+                                              const wchar_t* function,
+                                              const wchar_t* file,
+                                              unsigned int line,
+                                              uintptr_t reserved) {
+  // This is an invalid parameter, not an exception.  It's safe to play with
+  // sprintf here.
+  AutoExceptionHandler auto_exception_handler;
+  ExceptionHandler* current_handler = auto_exception_handler.get_handler();
+
+  MDRawAssertionInfo assertion;
+  memset(&assertion, 0, sizeof(assertion));
+  _snwprintf_s(reinterpret_cast<wchar_t*>(assertion.expression),
+               sizeof(assertion.expression) / sizeof(assertion.expression[0]),
+               _TRUNCATE, L"%s", expression);
+  _snwprintf_s(reinterpret_cast<wchar_t*>(assertion.function),
+               sizeof(assertion.function) / sizeof(assertion.function[0]),
+               _TRUNCATE, L"%s", function);
+  _snwprintf_s(reinterpret_cast<wchar_t*>(assertion.file),
+               sizeof(assertion.file) / sizeof(assertion.file[0]),
+               _TRUNCATE, L"%s", file);
+  assertion.line = line;
+  assertion.type = MD_ASSERTION_INFO_TYPE_INVALID_PARAMETER;
+
+  // Make up an exception record for the current thread and CPU context
+  // to make it possible for the crash processor to classify these
+  // as do regular crashes, and to make it humane for developers to
+  // analyze them.
+  EXCEPTION_RECORD exception_record = {};
+  CONTEXT exception_context = {};
+  EXCEPTION_POINTERS exception_ptrs = { &exception_record, &exception_context };
+
+  ::RtlCaptureContext(&exception_context);
+
+  exception_record.ExceptionCode = STATUS_INVALID_PARAMETER;
+
+  // We store pointers to the the expression and function strings,
+  // and the line as exception parameters to make them easy to
+  // access by the developer on the far side.
+  exception_record.NumberParameters = 3;
+  exception_record.ExceptionInformation[0] =
+      reinterpret_cast<ULONG_PTR>(&assertion.expression);
+  exception_record.ExceptionInformation[1] =
+      reinterpret_cast<ULONG_PTR>(&assertion.file);
+  exception_record.ExceptionInformation[2] = assertion.line;
+
+  bool success = false;
+  // In case of out-of-process dump generation, directly call
+  // WriteMinidumpWithException since there is no separate thread running.
+  if (current_handler->IsOutOfProcess()) {
+    success = current_handler->WriteMinidumpWithException(
+        GetCurrentThreadId(),
+        &exception_ptrs,
+        &assertion) == MinidumpResult::Success;
+  } else {
+    success = current_handler->WriteMinidumpOnHandlerThread(&exception_ptrs,
+                                                            &assertion);
+  }
+
+  if (!success) {
+    if (current_handler->previous_iph_) {
+      // The handler didn't fully handle the exception.  Give it to the
+      // previous invalid parameter handler.
+      current_handler->previous_iph_(expression,
+                                     function,
+                                     file,
+                                     line,
+                                     reserved);
+    } else {
+      // If there's no previous handler, pass the exception back in to the
+      // invalid parameter handler's core.  That's the routine that called this
+      // function, but now, since this function is no longer registered (and in
+      // fact, no function at all is registered), this will result in the
+      // default code path being taken: _CRT_DEBUGGER_HOOK and _invoke_watson.
+      // Use _invalid_parameter where it exists (in _DEBUG builds) as it passes
+      // more information through.  In non-debug builds, it is not available,
+      // so fall back to using _invalid_parameter_noinfo.  See invarg.c in the
+      // CRT source.
+#ifdef _DEBUG
+      _invalid_parameter(expression, function, file, line, reserved);
+#else  // _DEBUG
+      _invalid_parameter_noinfo();
+#endif  // _DEBUG
+    }
+  }
+
+  // The handler either took care of the invalid parameter problem itself,
+  // or passed it on to another handler.  "Swallow" it by exiting, paralleling
+  // the behavior of "swallowing" exceptions.
+  exit(0);
+}
+#endif  // _MSC_VER >= 1400
+
+// static
+void ExceptionHandler::HandlePureVirtualCall() {
+  // This is an pure virtual function call, not an exception.  It's safe to
+  // play with sprintf here.
+  AutoExceptionHandler auto_exception_handler;
+  ExceptionHandler* current_handler = auto_exception_handler.get_handler();
+
+  MDRawAssertionInfo assertion;
+  memset(&assertion, 0, sizeof(assertion));
+  assertion.type = MD_ASSERTION_INFO_TYPE_PURE_VIRTUAL_CALL;
+
+  // Make up an exception record for the current thread and CPU context
+  // to make it possible for the crash processor to classify these
+  // as do regular crashes, and to make it humane for developers to
+  // analyze them.
+  EXCEPTION_RECORD exception_record = {};
+  CONTEXT exception_context = {};
+  EXCEPTION_POINTERS exception_ptrs = { &exception_record, &exception_context };
+
+  ::RtlCaptureContext(&exception_context);
+
+  exception_record.ExceptionCode = STATUS_NONCONTINUABLE_EXCEPTION;
+
+  // We store pointers to the the expression and function strings,
+  // and the line as exception parameters to make them easy to
+  // access by the developer on the far side.
+  exception_record.NumberParameters = 3;
+  exception_record.ExceptionInformation[0] =
+      reinterpret_cast<ULONG_PTR>(&assertion.expression);
+  exception_record.ExceptionInformation[1] =
+      reinterpret_cast<ULONG_PTR>(&assertion.file);
+  exception_record.ExceptionInformation[2] = assertion.line;
+
+  bool success = false;
+  // In case of out-of-process dump generation, directly call
+  // WriteMinidumpWithException since there is no separate thread running.
+
+  if (current_handler->IsOutOfProcess()) {
+    success = current_handler->WriteMinidumpWithException(
+        GetCurrentThreadId(),
+        &exception_ptrs,
+        &assertion) == MinidumpResult::Success;
+  } else {
+    success = current_handler->WriteMinidumpOnHandlerThread(&exception_ptrs,
+                                                            &assertion);
+  }
+
+  if (!success) {
+    if (current_handler->previous_pch_) {
+      // The handler didn't fully handle the exception.  Give it to the
+      // previous purecall handler.
+      current_handler->previous_pch_();
+    } else {
+      // If there's no previous handler, return and let _purecall handle it.
+      // This will just put up an assertion dialog.
+      return;
+    }
+  }
+
+  // The handler either took care of the invalid parameter problem itself,
+  // or passed it on to another handler.  "Swallow" it by exiting, paralleling
+  // the behavior of "swallowing" exceptions.
+  exit(0);
+}
+
+// static
+LONG ExceptionHandler::HandleHeapCorruption(EXCEPTION_POINTERS* exinfo) {
+  if (exinfo->ExceptionRecord->ExceptionCode != STATUS_HEAP_CORRUPTION) {
+    return EXCEPTION_CONTINUE_SEARCH;
+  }
+
+  AutoExceptionHandler auto_exception_handler;
+  ExceptionHandler* current_handler = auto_exception_handler.get_handler();
+
+  bool result = false;
+
+  // In case of out-of-process dump generation, directly call
+  // WriteMinidumpWithException since there is no separate thread running.
+  if (current_handler->IsOutOfProcess()) {
+    result = current_handler->WriteMinidumpWithException(
+                 GetCurrentThreadId(), exinfo, NULL) == MinidumpResult::Success;
+  } else {
+    result = current_handler->WriteMinidumpOnHandlerThread(exinfo, NULL);
+  }
+
+  return result ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
+}
+
+bool ExceptionHandler::WriteMinidumpOnHandlerThread(
+    EXCEPTION_POINTERS* exinfo, MDRawAssertionInfo* assertion) {
+  EnterCriticalSection(&handler_critical_section_);
+
+  // There isn't much we can do if the handler thread
+  // was not successfully created.
+  if (handler_thread_ == NULL) {
+    LeaveCriticalSection(&handler_critical_section_);
+    return false;
+  }
+
+  // The handler thread should only be created when the semaphores are valid.
+  assert(handler_start_semaphore_ != NULL);
+  assert(handler_finish_semaphore_ != NULL);
+
+  // Set up data to be passed in to the handler thread.
+  requesting_thread_id_ = GetCurrentThreadId();
+  exception_info_ = exinfo;
+  assertion_ = assertion;
+
+  // This causes the handler thread to call WriteMinidumpWithException.
+  ReleaseSemaphore(handler_start_semaphore_, 1, NULL);
+
+  // Wait until WriteMinidumpWithException is done and collect its return value.
+  WaitForSingleObject(handler_finish_semaphore_, INFINITE);
+  bool status = (handler_return_value_ == MinidumpResult::Success);
+
+  // Clean up.
+  requesting_thread_id_ = 0;
+  exception_info_ = NULL;
+  assertion_ = NULL;
+
+  LeaveCriticalSection(&handler_critical_section_);
+
+  return status;
+}
+
+bool ExceptionHandler::WriteMinidump() {
+  // Make up an exception record for the current thread and CPU context
+  // to make it possible for the crash processor to classify these
+  // as do regular crashes, and to make it humane for developers to
+  // analyze them.
+  EXCEPTION_RECORD exception_record = {};
+  CONTEXT exception_context = {};
+  EXCEPTION_POINTERS exception_ptrs = { &exception_record, &exception_context };
+
+  ::RtlCaptureContext(&exception_context);
+  exception_record.ExceptionCode = STATUS_NONCONTINUABLE_EXCEPTION;
+
+  return WriteMinidumpForException(&exception_ptrs);
+}
+
+bool ExceptionHandler::WriteMinidumpForException(EXCEPTION_POINTERS* exinfo) {
+  // In case of out-of-process dump generation, directly call
+  // WriteMinidumpWithException since there is no separate thread running.
+  if (IsOutOfProcess()) {
+    return WriteMinidumpWithException(GetCurrentThreadId(),
+                                      exinfo,
+                                      NULL) == MinidumpResult::Success;
+  }
+
+  bool success = WriteMinidumpOnHandlerThread(exinfo, NULL);
+  UpdateNextID();
+  return success;
+}
+
+// static
+bool ExceptionHandler::WriteMinidump(const wstring &dump_path,
+                                     MinidumpCallback callback,
+                                     void* callback_context,
+                                     MINIDUMP_TYPE dump_type) {
+  ExceptionHandler handler(dump_path, NULL, callback, callback_context,
+                           HANDLER_NONE, dump_type, (HANDLE)NULL, NULL);
+  return handler.WriteMinidump();
+}
+
+// static
+bool ExceptionHandler::WriteMinidumpForChild(HANDLE child,
+                                             DWORD child_blamed_thread,
+                                             const wstring& dump_path,
+                                             MinidumpCallback callback,
+                                             void* callback_context,
+                                             MINIDUMP_TYPE dump_type) {
+  EXCEPTION_RECORD ex;
+  CONTEXT ctx;
+  EXCEPTION_POINTERS exinfo = { NULL, NULL };
+  // As documented on MSDN, on failure SuspendThread returns (DWORD) -1
+  const DWORD kFailedToSuspendThread = static_cast<DWORD>(-1);
+  DWORD last_suspend_count = kFailedToSuspendThread;
+  HANDLE child_thread_handle = OpenThread(THREAD_GET_CONTEXT |
+                                          THREAD_QUERY_INFORMATION |
+                                          THREAD_SUSPEND_RESUME,
+                                          FALSE,
+                                          child_blamed_thread);
+  // This thread may have died already, so not opening the handle is a
+  // non-fatal error.
+  if (child_thread_handle != NULL) {
+    last_suspend_count = SuspendThread(child_thread_handle);
+    if (last_suspend_count != kFailedToSuspendThread) {
+      ctx.ContextFlags = CONTEXT_ALL;
+      if (GetThreadContext(child_thread_handle, &ctx)) {
+        memset(&ex, 0, sizeof(ex));
+        ex.ExceptionCode = EXCEPTION_BREAKPOINT;
+#if defined(_M_IX86)
+        ex.ExceptionAddress = reinterpret_cast<PVOID>(ctx.Eip);
+#elif defined(_M_X64)
+        ex.ExceptionAddress = reinterpret_cast<PVOID>(ctx.Rip);
+#endif
+        exinfo.ExceptionRecord = &ex;
+        exinfo.ContextRecord = &ctx;
+      }
+    }
+  }
+
+  ExceptionHandler handler(dump_path, NULL, callback, callback_context,
+                           HANDLER_NONE, dump_type, (HANDLE)NULL, NULL);
+  bool success = handler.WriteMinidumpWithExceptionForProcess(
+      child_blamed_thread,
+      exinfo.ExceptionRecord ? &exinfo : NULL,
+      NULL, child, false);
+
+  if (last_suspend_count != kFailedToSuspendThread) {
+    ResumeThread(child_thread_handle);
+  }
+
+  CloseHandle(child_thread_handle);
+
+  if (callback) {
+    // nullptr here for phc::AddrInfo* is ok because this is not a crash.
+    success = callback(handler.dump_path_c_, handler.next_minidump_id_c_,
+                       callback_context, NULL, NULL, nullptr, success);
+  }
+
+  return success;
+}
+
+#ifdef MOZ_PHC
+static void GetPHCAddrInfo(EXCEPTION_POINTERS* exinfo,
+                           mozilla::phc::AddrInfo* addr_info) {
+  // Is this a crash involving a PHC allocation?
+  PEXCEPTION_RECORD rec = exinfo->ExceptionRecord;
+  if (rec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
+    // rec->ExceptionInformation[0] contains a value indicating what type of
+    // operation it what, and rec->ExceptionInformation[1] contains the
+    // virtual address of the inaccessible data.
+    char* crashAddr = reinterpret_cast<char*>(rec->ExceptionInformation[1]);
+    ReplaceMalloc::IsPHCAllocation(crashAddr, addr_info);
+  }
+}
+#endif
+
+ExceptionHandler::MinidumpResult ExceptionHandler::WriteMinidumpWithException(
+    DWORD requesting_thread_id,
+    EXCEPTION_POINTERS* exinfo,
+    MDRawAssertionInfo* assertion) {
+    mozilla::phc::AddrInfo addr_info;
+#ifdef MOZ_PHC
+    GetPHCAddrInfo(exinfo, &addr_info);
+#endif
+
+  // Give user code a chance to approve or prevent writing a minidump.  If the
+  // filter returns Failure or Ignored , don't handle the exception and return
+  // the result for further handling downstream. If this method was called as a
+  // result of an exception, returning Failure will cause HandleException to
+  // call any previous handler or return EXCEPTION_CONTINUE_SEARCH on the
+  // exception thread, allowing it to appear as though this handler were not
+  // present at all.
+  if (filter_) {
+    switch (filter_(callback_context_, exinfo, assertion)) {
+      case FilterResult::HandleException:      break;
+      case FilterResult::AbortWithoutMinidump: return MinidumpResult::Ignored;
+      case FilterResult::ContinueSearch:       return MinidumpResult::Failure;
+    }
+  }
+
+  bool success = false;
+  if (IsOutOfProcess()) {
+    success = crash_generation_client_->RequestDump(exinfo, assertion);
+  } else {
+    success = WriteMinidumpWithExceptionForProcess(requesting_thread_id,
+                                                   exinfo,
+                                                   assertion,
+                                                   GetCurrentProcess(),
+                                                   true);
+  }
+
+  if (callback_) {
+    // TODO(munjal): In case of out-of-process dump generation, both
+    // dump_path_c_ and next_minidump_id_ will be NULL. For out-of-process
+    // scenario, the server process ends up creating the dump path and dump
+    // id so they are not known to the client.
+    success = callback_(dump_path_c_, next_minidump_id_c_, callback_context_,
+                        exinfo, assertion, &addr_info, success);
+  }
+
+  return success ? MinidumpResult::Success : MinidumpResult::Failure;
+}
+
+// static
+bool ExceptionHandler::WriteMinidumpWithExceptionForProcess(
+    DWORD requesting_thread_id,
+    EXCEPTION_POINTERS* exinfo,
+    MDRawAssertionInfo* assertion,
+    HANDLE process,
+    bool write_requester_stream) {
+  bool success = false;
+  if (minidump_write_dump_) {
+    HANDLE dump_file = CreateFile(next_minidump_path_c_,
+                                  GENERIC_WRITE,
+                                  0,  // no sharing
+                                  NULL,
+                                  CREATE_NEW,  // fail if exists
+                                  FILE_ATTRIBUTE_NORMAL,
+                                  NULL);
+    if (dump_file != INVALID_HANDLE_VALUE) {
+      MINIDUMP_EXCEPTION_INFORMATION except_info;
+      except_info.ThreadId = requesting_thread_id;
+      except_info.ExceptionPointers = exinfo;
+      except_info.ClientPointers = FALSE;
+
+      // Leave room in user_stream_array for possible breakpad and
+      // assertion info streams.
+      MINIDUMP_USER_STREAM user_stream_array[2];
+      MINIDUMP_USER_STREAM_INFORMATION user_streams;
+      user_streams.UserStreamCount = 0;
+      user_streams.UserStreamArray = user_stream_array;
+
+      if (write_requester_stream) {
+        // Add an MDRawBreakpadInfo stream to the minidump, to provide
+        // additional information about the exception handler to the Breakpad
+        // processor. The information will help the processor determine which
+        // threads are relevant.  The Breakpad processor does not require this
+        // information but can function better with Breakpad-generated dumps
+        // when it is present. The native debugger is not harmed by the
+        // presence of this information.
+        MDRawBreakpadInfo breakpad_info;
+        breakpad_info.validity = MD_BREAKPAD_INFO_VALID_DUMP_THREAD_ID |
+                                 MD_BREAKPAD_INFO_VALID_REQUESTING_THREAD_ID;
+        breakpad_info.dump_thread_id = GetCurrentThreadId();
+        breakpad_info.requesting_thread_id = requesting_thread_id;
+
+        int index = user_streams.UserStreamCount;
+        user_stream_array[index].Type = MD_BREAKPAD_INFO_STREAM;
+        user_stream_array[index].BufferSize = sizeof(breakpad_info);
+        user_stream_array[index].Buffer = &breakpad_info;
+        ++user_streams.UserStreamCount;
+      }
+
+      if (assertion) {
+        int index = user_streams.UserStreamCount;
+        user_stream_array[index].Type = MD_ASSERTION_INFO_STREAM;
+        user_stream_array[index].BufferSize = sizeof(MDRawAssertionInfo);
+        user_stream_array[index].Buffer = assertion;
+        ++user_streams.UserStreamCount;
+      }
+
+      MinidumpCallbackContext context;
+      context.iter = app_memory_info_.begin();
+      context.end = app_memory_info_.end();
+
+      if (exinfo) {
+        IncludeAppMemoryFromExceptionContext(process,
+                                             requesting_thread_id,
+                                             app_memory_info_,
+                                             exinfo->ContextRecord,
+                                             !include_context_heap_);
+      }
+
+      // Skip the reserved element if there was no instruction memory
+      if (context.iter->ptr == 0) {
+        context.iter++;
+      }
+
+      MINIDUMP_CALLBACK_INFORMATION callback;
+      callback.CallbackRoutine = MinidumpWriteDumpCallback;
+      callback.CallbackParam = reinterpret_cast<void*>(&context);
+
+      // The explicit comparison to TRUE avoids a warning (C4800).
+      success = (minidump_write_dump_(process,
+                                      GetProcessId(process),
+                                      dump_file,
+                                      dump_type_,
+                                      exinfo ? &except_info : NULL,
+                                      &user_streams,
+                                      &callback) == TRUE);
+
+      CloseHandle(dump_file);
+    }
+  }
+
+  return success;
+}
+
+void ExceptionHandler::UpdateNextID() {
+  assert(uuid_create_);
+  UUID id = {0};
+  if (uuid_create_) {
+    uuid_create_(&id);
+  }
+  next_minidump_id_ = GUIDString::GUIDToWString(&id);
+  next_minidump_id_c_ = next_minidump_id_.c_str();
+
+  wchar_t minidump_path[MAX_PATH];
+  swprintf(minidump_path, MAX_PATH, L"%s\\%s.dmp",
+           dump_path_c_, next_minidump_id_c_);
+
+  // remove when VC++7.1 is no longer supported
+  minidump_path[MAX_PATH - 1] = L'\0';
+
+  next_minidump_path_ = minidump_path;
+  next_minidump_path_c_ = next_minidump_path_.c_str();
+}
+
+void ExceptionHandler::RegisterAppMemory(void* ptr, size_t length) {
+  AppMemoryList::iterator iter =
+    std::find(app_memory_info_.begin(), app_memory_info_.end(), ptr);
+  if (iter != app_memory_info_.end()) {
+    // Don't allow registering the same pointer twice.
+    return;
+  }
+
+  AppMemory app_memory;
+  app_memory.ptr = reinterpret_cast<ULONG64>(ptr);
+  app_memory.length = static_cast<ULONG>(length);
+  app_memory.preallocated = false;
+  app_memory_info_.push_back(app_memory);
+}
+
+void ExceptionHandler::UnregisterAppMemory(void* ptr) {
+  AppMemoryList::iterator iter =
+    std::find(app_memory_info_.begin(), app_memory_info_.end(), ptr);
+  if (iter != app_memory_info_.end()) {
+    app_memory_info_.erase(iter);
+  }
+}
+
+void ExceptionHandler::set_include_context_heap(bool enabled) {
+  if (enabled && !include_context_heap_) {
+    // Initialize system info used in including context heap regions.
+    InitAppMemoryInternal();
+
+    // Preallocate AppMemory instances for exception context if necessary.
+    auto predicate = [] (const AppMemory& appMemory) -> bool {
+      return appMemory.preallocated;
+    };
+
+    int preallocatedCount =
+      std::count_if(app_memory_info_.begin(), app_memory_info_.end(), predicate);
+
+    for (size_t i = 0; i < kExceptionAppMemoryRegions - preallocatedCount; i++) {
+      AppMemory app_memory;
+      app_memory.ptr = reinterpret_cast<ULONG64>(nullptr);
+      app_memory.length = 0;
+      app_memory.preallocated = true;
+      app_memory_info_.push_back(app_memory);
+    }
+  }
+
+  include_context_heap_ = enabled;
+}
+
+}  // namespace google_breakpad
diff --git a/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.h b/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.h
new file mode 100644
index 0000000000..18c8f5821a
--- /dev/null
+++ b/toolkit/crashreporter/breakpad-client/windows/handler/exception_handler.h
@@ -0,0 +1,547 @@
+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// ExceptionHandler can write a minidump file when an exception occurs,
+// or when WriteMinidump() is called explicitly by your program.
+//
+// To have the exception handler write minidumps when an uncaught exception
+// (crash) occurs, you should create an instance early in the execution
+// of your program, and keep it around for the entire time you want to
+// have crash handling active (typically, until shutdown).
+//
+// If you want to write minidumps without installing the exception handler,
+// you can create an ExceptionHandler with install_handler set to false,
+// then call WriteMinidump.  You can also use this technique if you want to
+// use different minidump callbacks for different call sites.
+//
+// In either case, a callback function is called when a minidump is written,
+// which receives the unqiue id of the minidump.  The caller can use this
+// id to collect and write additional application state, and to launch an
+// external crash-reporting application.
+//
+// It is important that creation and destruction of ExceptionHandler objects
+// be nested cleanly, when using install_handler = true.
+// Avoid the following pattern:
+//   ExceptionHandler *e = new ExceptionHandler(...);
+//   ExceptionHandler *f = new ExceptionHandler(...);
+//   delete e;
+// This will put the exception filter stack into an inconsistent state.
+
+#ifndef CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__
+#define CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__
+
+#include <stdlib.h>
+#include <windows.h>
+#include <dbghelp.h>
+#include <rpc.h>
+
+#pragma warning(push)
+// Disable exception handler warnings.
+#pragma warning(disable:4530)
+
+#include <list>
+#include <string>
+#include <vector>
+
+#include "windows/common/minidump_callback.h"
+#include "windows/common/ipc_protocol.h"
+#include "windows/crash_generation/crash_generation_client.h"
+#include "common/scoped_ptr.h"
+#include "google_breakpad/common/minidump_format.h"
+
+#ifdef MOZ_PHC
+#include "PHC.h"
+#else
+namespace mozilla { namespace phc { class AddrInfo {}; } }
+#endif
+
+namespace google_breakpad {
+
+using std::vector;
+using std::wstring;
+
+class ExceptionHandler {
+ public:
+  // The result value for the filter callback, see below.
+  enum class FilterResult {
+    HandleException,
+    AbortWithoutMinidump,
+    ContinueSearch
+  };
+
+  // A callback function to run before Breakpad performs any substantial
+  // processing of an exception.  A FilterCallback is called before writing
+  // a minidump.  context is the parameter supplied by the user as
+  // callback_context when the handler was created.  exinfo points to the
+  // exception record, if any; assertion points to assertion information,
+  // if any.
+  //
+  // If a FilterCallback returns HandleException, Breakpad will attempt to
+  // write a minidump.  If a FilterCallback returns ContinueSearch Breakpad
+  // will immediately report the exception as unhandled without writing a
+  // minidump, allowing another handler the opportunity to handle it.
+  // If a FilterCallback returns AbortWithoutMinidump, Breakpad will report the
+  // exception as handled but will not write a minidump, letting the process
+  // terminate itself instead.
+  typedef FilterResult (*FilterCallback)(void* context,
+                                         EXCEPTION_POINTERS* exinfo,
+                                         MDRawAssertionInfo* assertion);
+
+  // A callback function to run after the minidump has been written.
+  // minidump_id is a unique id for the dump, so the minidump
+  // file is <dump_path>\<minidump_id>.dmp.  context is the parameter supplied
+  // by the user as callback_context when the handler was created.  exinfo
+  // points to the exception record, or NULL if no exception occurred.
+  // succeeded indicates whether a minidump file was successfully written.
+  // assertion points to information about an assertion if the handler was
+  // invoked by an assertion.
+  //
+  // If an exception occurred and the callback returns true, Breakpad will treat
+  // the exception as fully-handled, suppressing any other handlers from being
+  // notified of the exception.  If the callback returns false, Breakpad will
+  // treat the exception as unhandled, and allow another handler to handle it.
+  // If there are no other handlers, Breakpad will report the exception to the
+  // system as unhandled, allowing a debugger or native crash dialog the
+  // opportunity to handle the exception.  Most callback implementations
+  // should normally return the value of |succeeded|, or when they wish to
+  // not report an exception of handled, false.  Callbacks will rarely want to
+  // return true directly (unless |succeeded| is true).
+  //
+  // For out-of-process dump generation, dump path and minidump ID will always
+  // be NULL. In case of out-of-process dump generation, the dump path and
+  // minidump id are controlled by the server process and are not communicated
+  // back to the crashing process.
+  typedef bool (*MinidumpCallback)(const wchar_t* dump_path,
+                                   const wchar_t* minidump_id,
+                                   void* context,
+                                   EXCEPTION_POINTERS* exinfo,
+                                   MDRawAssertionInfo* assertion,
+                                   const mozilla::phc::AddrInfo* addr_info,
+                                   bool succeeded);
+
+  // HandlerType specifies which types of handlers should be installed, if
+  // any.  Use HANDLER_NONE for an ExceptionHandler that remains idle,
+  // without catching any failures on its own.  This type of handler may
+  // still be triggered by calling WriteMinidump.  Otherwise, use a
+  // combination of the other HANDLER_ values, or HANDLER_ALL to install
+  // all handlers.
+  enum HandlerType {
+    HANDLER_NONE = 0,
+    HANDLER_EXCEPTION = 1 << 0,          // SetUnhandledExceptionFilter
+    HANDLER_INVALID_PARAMETER = 1 << 1,  // _set_invalid_parameter_handler
+    HANDLER_PURECALL = 1 << 2,           // _set_purecall_handler
+    HANDLER_HEAP_CORRUPTION = 1 << 4,    // AddVectoredExceptionHandler
+    HANDLER_ALL = HANDLER_EXCEPTION | HANDLER_INVALID_PARAMETER |
+                  HANDLER_PURECALL | HANDLER_HEAP_CORRUPTION
+  };
+
+  // Creates a new ExceptionHandler instance to handle writing minidumps.
+  // Before writing a minidump, the optional filter callback will be called.
+  // Its return value determines whether or not Breakpad should write a
+  // minidump.  Minidump files will be written to dump_path, and the optional
+  // callback is called after writing the dump file, as described above.
+  // handler_types specifies the types of handlers that should be installed.
+  ExceptionHandler(const wstring& dump_path,
+                   FilterCallback filter,
+                   MinidumpCallback callback,
+                   void* callback_context,
+                   int handler_types);
+
+  // Creates a new ExceptionHandler instance that can attempt to perform
+  // out-of-process dump generation if pipe_name is not NULL. If pipe_name is
+  // NULL, or if out-of-process dump generation registration step fails,
+  // in-process dump generation will be used. This also allows specifying
+  // the dump type to generate.
+  ExceptionHandler(const wstring& dump_path,
+                   FilterCallback filter,
+                   MinidumpCallback callback,
+                   void* callback_context,
+                   int handler_types,
+                   MINIDUMP_TYPE dump_type,
+                   const wchar_t* pipe_name,
+                   const CustomClientInfo* custom_info);
+
+  // As above, creates a new ExceptionHandler instance to perform
+  // out-of-process dump generation if the given pipe_handle is not NULL.
+  ExceptionHandler(const wstring& dump_path,
+                   FilterCallback filter,
+                   MinidumpCallback callback,
+                   void* callback_context,
+                   int handler_types,
+                   MINIDUMP_TYPE dump_type,
+                   HANDLE pipe_handle,
+                   const CustomClientInfo* custom_info);
+
+  // ExceptionHandler that ENSURES out-of-process dump generation.  Expects a
+  // crash generation client that is already registered with a crash generation
+  // server.  Takes ownership of the passed-in crash_generation_client.
+  //
+  // Usage example:
+  //   crash_generation_client = new CrashGenerationClient(..);
+  //   if (crash_generation_client->Register()) {
+  //     // Registration with the crash generation server succeeded.
+  //     // Out-of-process dump generation is guaranteed.
+  //     g_handler = new ExceptionHandler(.., crash_generation_client, ..);
+  //     return true;
+  //   }
+  ExceptionHandler(const wstring& dump_path,
+                   FilterCallback filter,
+                   MinidumpCallback callback,
+                   void* callback_context,
+                   int handler_types,
+                   CrashGenerationClient* crash_generation_client);
+
+  ~ExceptionHandler();
+
+  // Get and set the minidump path.
+  wstring dump_path() const { return dump_path_; }
+  void set_dump_path(const wstring &dump_path) {
+    dump_path_ = dump_path;
+    dump_path_c_ = dump_path_.c_str();
+    UpdateNextID();  // Necessary to put dump_path_ in next_minidump_path_.
+  }
+
+  // Requests that a previously reported crash be uploaded.
+  bool RequestUpload(DWORD crash_id);
+
+  // Writes a minidump immediately.  This can be used to capture the
+  // execution state independently of a crash.  Returns true on success.
+  bool WriteMinidump();
+
+  // Writes a minidump immediately, with the user-supplied exception
+  // information.
+  bool WriteMinidumpForException(EXCEPTION_POINTERS* exinfo);
+
+  // Convenience form of WriteMinidump which does not require an
+  // ExceptionHandler instance.
+  static bool WriteMinidump(const wstring &dump_path,
+                            MinidumpCallback callback, void* callback_context,
+                            MINIDUMP_TYPE dump_type = MiniDumpNormal);
+
+  // Write a minidump of |child| immediately.  This can be used to
+  // capture the execution state of |child| independently of a crash.
+  // Pass a meaningful |child_blamed_thread| to make that thread in
+  // the child process the one from which a crash signature is
+  // extracted.
+  static bool WriteMinidumpForChild(HANDLE child,
+                                    DWORD child_blamed_thread,
+                                    const wstring& dump_path,
+                                    MinidumpCallback callback,
+                                    void* callback_context,
+                                    MINIDUMP_TYPE dump_type = MiniDumpNormal);
+
+  // Get the thread ID of the thread requesting the dump (either the exception
+  // thread or any other thread that called WriteMinidump directly).  This
+  // may be useful if you want to include additional thread state in your
+  // dumps.
+  DWORD get_requesting_thread_id() const { return requesting_thread_id_; }
+
+  // Controls behavior of EXCEPTION_BREAKPOINT and EXCEPTION_SINGLE_STEP.
+  bool get_handle_debug_exceptions() const { return handle_debug_exceptions_; }
+  void set_handle_debug_exceptions(bool handle_debug_exceptions) {
+    handle_debug_exceptions_ = handle_debug_exceptions;
+  }
+
+  // Controls behavior of EXCEPTION_INVALID_HANDLE.
+  bool get_consume_invalid_handle_exceptions() const {
+    return consume_invalid_handle_exceptions_;
+  }
+  void set_consume_invalid_handle_exceptions(
+      bool consume_invalid_handle_exceptions) {
+    consume_invalid_handle_exceptions_ = consume_invalid_handle_exceptions;
+  }
+
+  // Returns whether out-of-process dump generation is used or not.
+  bool IsOutOfProcess() const { return crash_generation_client_.get() != NULL; }
+
+  // Calling RegisterAppMemory(p, len) causes len bytes starting
+  // at address p to be copied to the minidump when a crash happens.
+  void RegisterAppMemory(void* ptr, size_t length);
+  void UnregisterAppMemory(void* ptr);
+
+  // Calling set_include_context_heap(true) causes heap regions to be included
+  // in the minidump when a crash happens. The heap regions are from the
+  // register values of the crashing context.
+  void set_include_context_heap(bool enabled);
+
+ private:
+  friend class AutoExceptionHandler;
+
+  // Initializes the instance with given values.
+  void Initialize(const wstring& dump_path,
+                  FilterCallback filter,
+                  MinidumpCallback callback,
+                  void* callback_context,
+                  int handler_types,
+                  MINIDUMP_TYPE dump_type,
+                  const wchar_t* pipe_name,
+                  HANDLE pipe_handle,
+                  CrashGenerationClient* crash_generation_client,
+                  const CustomClientInfo* custom_info);
+
+  // Function pointer type for MiniDumpWriteDump, which is looked up
+  // dynamically.
+  typedef BOOL (WINAPI *MiniDumpWriteDump_type)(
+      HANDLE hProcess,
+      DWORD dwPid,
+      HANDLE hFile,
+      MINIDUMP_TYPE DumpType,
+      CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
+      CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
+      CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam);
+
+  // Function pointer type for UuidCreate, which is looked up dynamically.
+  typedef RPC_STATUS (RPC_ENTRY *UuidCreate_type)(UUID* Uuid);
+
+  // Runs the main loop for the exception handler thread.
+  static DWORD WINAPI ExceptionHandlerThreadMain(void* lpParameter);
+
+  // Called on the exception thread when an unhandled exception occurs.
+  // Signals the exception handler thread to handle the exception.
+  static LONG WINAPI HandleException(EXCEPTION_POINTERS* exinfo);
+
+#if _MSC_VER >= 1400  // MSVC 2005/8
+  // This function will be called by some CRT functions when they detect
+  // that they were passed an invalid parameter.  Note that in _DEBUG builds,
+  // the CRT may display an assertion dialog before calling this function,
+  // and the function will not be called unless the assertion dialog is
+  // dismissed by clicking "Ignore."
+  static void HandleInvalidParameter(const wchar_t* expression,
+                                     const wchar_t* function,
+                                     const wchar_t* file,
+                                     unsigned int line,
+                                     uintptr_t reserved);
+#endif  // _MSC_VER >= 1400
+
+  // This function will be called by the CRT when a pure virtual
+  // function is called.
+  static void HandlePureVirtualCall();
+
+  // This function will be called by the vectored exception handler and will
+  // generate a minidump only for exceptions of type STATUS_HEAP_CORRUPTION.
+  static LONG WINAPI HandleHeapCorruption(EXCEPTION_POINTERS* exinfo);
+
+  // This is called on the exception thread or on another thread that
+  // the user wishes to produce a dump from.  It calls
+  // WriteMinidumpWithException on the handler thread, avoiding stack
+  // overflows and inconsistent dumps due to writing the dump from
+  // the exception thread.  If the dump is requested as a result of an
+  // exception, exinfo contains exception information, otherwise, it
+  // is NULL.  If the dump is requested as a result of an assertion
+  // (such as an invalid parameter being passed to a CRT function),
+  // assertion contains data about the assertion, otherwise, it is NULL.
+  bool WriteMinidumpOnHandlerThread(EXCEPTION_POINTERS* exinfo,
+                                    MDRawAssertionInfo* assertion);
+
+  // The return value for WriteMinidumpWithException(), see below.
+  enum class MinidumpResult {
+    Success,
+    Failure,
+    Ignored
+  };
+
+  // This function is called on the handler thread.  It calls into
+  // WriteMinidumpWithExceptionForProcess() with a handle to the
+  // current process.  requesting_thread_id is the ID of the thread
+  // that requested the dump.  If the dump is requested as a result of
+  // an exception, exinfo contains exception information, otherwise,
+  // it is NULL. It will return Success in case the minidump has been written
+  // successfully, Failure if we couldn't write out the minidump because of an
+  // error and Ignored if we didn't even try to write the minidump because the
+  // filter callback indicated that we should ignore this exception and abort.
+  // The latter condition is only relevent for a top-level exception handler,
+  // other callers should equate it to a failure.
+  MinidumpResult WriteMinidumpWithException(DWORD requesting_thread_id,
+                                            EXCEPTION_POINTERS* exinfo,
+                                            MDRawAssertionInfo* assertion);
+
+  // This function does the actual writing of a minidump.  It is
+  // called on the handler thread.  requesting_thread_id is the ID of
+  // the thread that requested the dump, if that information is
+  // meaningful.  If the dump is requested as a result of an
+  // exception, exinfo contains exception information, otherwise, it
+  // is NULL.  process is the one that will be dumped.  If
+  // requesting_thread_id is meaningful and should be added to the
+  // minidump, write_requester_stream is |true|.
+  bool WriteMinidumpWithExceptionForProcess(DWORD requesting_thread_id,
+                                            EXCEPTION_POINTERS* exinfo,
+                                            MDRawAssertionInfo* assertion,
+                                            HANDLE process,
+                                            bool write_requester_stream);
+
+  // Generates a new ID and stores it in next_minidump_id_, and stores the
+  // path of the next minidump to be written in next_minidump_path_.
+  void UpdateNextID();
+
+  FilterCallback filter_;
+  MinidumpCallback callback_;
+  void* callback_context_;
+
+  scoped_ptr<CrashGenerationClient> crash_generation_client_;
+
+  // The directory in which a minidump will be written, set by the dump_path
+  // argument to the constructor, or set_dump_path.
+  wstring dump_path_;
+
+  // The basename of the next minidump to be written, without the extension.
+  wstring next_minidump_id_;
+
+  // The full pathname of the next minidump to be written, including the file
+  // extension.
+  wstring next_minidump_path_;
+
+  // Pointers to C-string representations of the above.  These are set when
+  // the above wstring versions are set in order to avoid calling c_str during
+  // an exception, as c_str may attempt to allocate heap memory.  These
+  // pointers are not owned by the ExceptionHandler object, but their lifetimes
+  // should be equivalent to the lifetimes of the associated wstring, provided
+  // that the wstrings are not altered.
+  const wchar_t* dump_path_c_;
+  const wchar_t* next_minidump_id_c_;
+  const wchar_t* next_minidump_path_c_;
+
+  HMODULE dbghelp_module_;
+  MiniDumpWriteDump_type minidump_write_dump_;
+  MINIDUMP_TYPE dump_type_;
+
+  HMODULE rpcrt4_module_;
+  UuidCreate_type uuid_create_;
+
+  // Tracks the handler types that were installed according to the
+  // handler_types constructor argument.
+  int handler_types_;
+
+  // When installed_handler_ is true, previous_filter_ is the unhandled
+  // exception filter that was set prior to installing ExceptionHandler as
+  // the unhandled exception filter and pointing it to |this|.  NULL indicates
+  // that there is no previous unhandled exception filter.
+  LPTOP_LEVEL_EXCEPTION_FILTER previous_filter_;
+
+#if _MSC_VER >= 1400  // MSVC 2005/8
+  // Beginning in VC 8, the CRT provides an invalid parameter handler that will
+  // be called when some CRT functions are passed invalid parameters.  In
+  // earlier CRTs, the same conditions would cause unexpected behavior or
+  // crashes.
+  _invalid_parameter_handler previous_iph_;
+#endif  // _MSC_VER >= 1400
+
+  // The CRT allows you to override the default handler for pure
+  // virtual function calls.
+  _purecall_handler previous_pch_;
+
+  // Vectored exception handler used for catching STATUS_HEAP_CORRUPTION
+  // exceptions
+  PVOID heap_corruption_veh_;
+
+  // The exception handler thread.
+  HANDLE handler_thread_;
+
+  // True if the exception handler is being destroyed.
+  // Starting with MSVC 2005, Visual C has stronger guarantees on volatile vars.
+  // It has release semantics on write and acquire semantics on reads.
+  // See the msdn documentation.
+  volatile bool is_shutdown_;
+
+  // The critical section enforcing the requirement that only one exception be
+  // handled by a handler at a time.
+  CRITICAL_SECTION handler_critical_section_;
+
+  // Semaphores used to move exception handling between the exception thread
+  // and the handler thread.  handler_start_semaphore_ is signalled by the
+  // exception thread to wake up the handler thread when an exception occurs.
+  // handler_finish_semaphore_ is signalled by the handler thread to wake up
+  // the exception thread when handling is complete.
+  HANDLE handler_start_semaphore_;
+  HANDLE handler_finish_semaphore_;
+
+  // The next 2 fields contain data passed from the requesting thread to
+  // the handler thread.
+
+  // The thread ID of the thread requesting the dump (either the exception
+  // thread or any other thread that called WriteMinidump directly).
+  DWORD requesting_thread_id_;
+
+  // The exception info passed to the exception handler on the exception
+  // thread, if an exception occurred.  NULL for user-requested dumps.
+  EXCEPTION_POINTERS* exception_info_;
+
+  // If the handler is invoked due to an assertion, this will contain a
+  // pointer to the assertion information.  It is NULL at other times.
+  MDRawAssertionInfo* assertion_;
+
+  // The return value of the handler, passed from the handler thread back to
+  // the requesting thread.
+  MinidumpResult handler_return_value_;
+
+  // If true, the handler will intercept EXCEPTION_BREAKPOINT and
+  // EXCEPTION_SINGLE_STEP exceptions.  Leave this false (the default)
+  // to not interfere with debuggers.
+  bool handle_debug_exceptions_;
+
+  // If true, the handler will consume any EXCEPTION_INVALID_HANDLE exceptions.
+  // Leave this false (the default) to handle these exceptions as normal.
+  bool consume_invalid_handle_exceptions_;
+
+  // Callers can request additional memory regions to be included in
+  // the dump.
+  AppMemoryList app_memory_info_;
+
+  // A stack of ExceptionHandler objects that have installed unhandled
+  // exception filters.  This vector is used by HandleException to determine
+  // which ExceptionHandler object to route an exception to.  When an
+  // ExceptionHandler is created with install_handler true, it will append
+  // itself to this list.
+  static vector<ExceptionHandler*>* handler_stack_;
+
+  // The index of the ExceptionHandler in handler_stack_ that will handle the
+  // next exception.  Note that 0 means the last entry in handler_stack_, 1
+  // means the next-to-last entry, and so on.  This is used by HandleException
+  // to support multiple stacked Breakpad handlers.
+  static LONG handler_stack_index_;
+
+  // handler_stack_critical_section_ guards operations on handler_stack_ and
+  // handler_stack_index_. The critical section is initialized by the
+  // first instance of the class and destroyed by the last instance of it.
+  static CRITICAL_SECTION handler_stack_critical_section_;
+
+  // The number of instances of this class.
+  static volatile LONG instance_count_;
+
+  bool include_context_heap_;
+
+  // disallow copy ctor and operator=
+  explicit ExceptionHandler(const ExceptionHandler &);
+  void operator=(const ExceptionHandler &);
+};
+
+}  // namespace google_breakpad
+
+#pragma warning(pop)
+
+#endif  // CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__
diff --git a/toolkit/crashreporter/breakpad-client/windows/handler/objs.mozbuild b/toolkit/crashreporter/breakpad-client/windows/handler/objs.mozbuild
new file mode 100644
index 0000000000..22dc0d27dd
--- /dev/null
+++ b/toolkit/crashreporter/breakpad-client/windows/handler/objs.mozbuild
@@ -0,0 +1,17 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+lobjs_handler = [
+    'exception_handler.cc',
+]
+
+subdir = 'toolkit/crashreporter/breakpad-client/windows/handler'
+objs_handler = [
+    '/%s/%s' % (subdir, s) for s in lobjs_handler
+]
+
+if CONFIG['MOZ_PHC']:
+    DEFINES['MOZ_PHC'] = True