Keep only base/extractor.[cc|h].

third_party/breakpad/src/client/windows/handler/exception_handler.cc

Index: third_party/breakpad/src/client/windows/handler/exception_handler.cc
diff --git a/third_party/breakpad/src/client/windows/handler/exception_handler.cc b/third_party/breakpad/src/client/windows/handler/exception_handler.cc
deleted file mode 100644
index ec5397dcaf1a13bfb24100591a3ada3255377c63..0000000000000000000000000000000000000000
--- a/third_party/breakpad/src/client/windows/handler/exception_handler.cc
+++ /dev/null
@@ -1,898 +0,0 @@
-// 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 "client/windows/common/ipc_protocol.h"
-#include "client/windows/handler/exception_handler.h"
-#include "common/windows/guid_string.h"
-
-typedef VOID (WINAPI *RtlCaptureContextPtr) (PCONTEXT pContextRecord);
-
-namespace google_breakpad {
-
-static const int kWaitForHandlerThreadMs = 60000;
-static const int kExceptionHandlerThreadInitialStackSize = 64 * 1024;
-
-// This is passed as the context to the MinidumpWriteDump callback.
-typedef struct {
-  ULONG64 memory_base;
-  ULONG memory_size;
-  bool finished;
-} MinidumpCallbackContext;
-
-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,
-             custom_info);
-}
-
-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,
-             NULL);
-}
-
-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,
-                                  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;
-  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_ = false;
-  handle_debug_exceptions_ = false;
-
-  // Attempt to use out-of-process if user has specified pipe name.
-  if (pipe_name != NULL) {
-    scoped_ptr<CrashGenerationClient> client(
-        new CrashGenerationClient(pipe_name,
-                                  dump_type_,
-                                  custom_info));
-
-    // 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;
-      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);
-  }
-
-  // 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);
-
-    LeaveCriticalSection(&handler_stack_critical_section_);
-  }
-}
-
-ExceptionHandler::~ExceptionHandler() {
-  if (dbghelp_module_) {
-    FreeLibrary(dbghelp_module_);
-  }
-
-  if (rpcrt4_module_) {
-    FreeLibrary(rpcrt4_module_);
-  }
-
-  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_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);
-    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_);
-  }
-}
-
-// static
-DWORD ExceptionHandler::ExceptionHandlerThreadMain(void* lpParameter) {
-  ExceptionHandler* self = reinterpret_cast<ExceptionHandler *>(lpParameter);
-  assert(self);
-  assert(self->handler_start_semaphore_ != NULL);
-  assert(self->handler_finish_semaphore_ != NULL);
-
-  while (true) {
-    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);
-
-  bool success = false;
-
-  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()) {
-      success = current_handler->WriteMinidumpWithException(
-          GetCurrentThreadId(),
-          exinfo,
-          NULL);
-    } else {
-      success = current_handler->WriteMinidumpOnHandlerThread(exinfo, NULL);
-    }
-  }
-
-  // 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 (success) {
-    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 };
-
-  EXCEPTION_POINTERS* exinfo = NULL;
-
-  RtlCaptureContextPtr fnRtlCaptureContext = (RtlCaptureContextPtr)
-    GetProcAddress(GetModuleHandleW(L"kernel32"), "RtlCaptureContext");
-  if (fnRtlCaptureContext) {
-    fnRtlCaptureContext(&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;
-
-    exinfo = &exception_ptrs;
-  }
-
-  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(),
-        exinfo,
-        &assertion);
-  } else {
-    success = current_handler->WriteMinidumpOnHandlerThread(exinfo,
-                                                            &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 };
-
-  EXCEPTION_POINTERS* exinfo = NULL;
-
-  RtlCaptureContextPtr fnRtlCaptureContext = (RtlCaptureContextPtr)
-    GetProcAddress(GetModuleHandleW(L"kernel32"), "RtlCaptureContext");
-  if (fnRtlCaptureContext) {
-    fnRtlCaptureContext(&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;
-
-    exinfo = &exception_ptrs;
-  }
-
-  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(),
-        exinfo,
-        &assertion);
-  } else {
-    success = current_handler->WriteMinidumpOnHandlerThread(exinfo,
-                                                            &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);
-}
-
-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_;
-
-  // Clean up.
-  requesting_thread_id_ = 0;
-  exception_info_ = NULL;
-  assertion_ = NULL;
-
-  LeaveCriticalSection(&handler_critical_section_);
-
-  return status;
-}
-
-bool ExceptionHandler::WriteMinidump() {
-  return WriteMinidumpForException(NULL);
-}
-
-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);
-  }
-
-  bool success = WriteMinidumpOnHandlerThread(exinfo, NULL);
-  UpdateNextID();
-  return success;
-}
-
-// static
-bool ExceptionHandler::WriteMinidump(const wstring &dump_path,
-                                     MinidumpCallback callback,
-                                     void* callback_context) {
-  ExceptionHandler handler(dump_path, NULL, callback, callback_context,
-                           HANDLER_NONE);
-  return handler.WriteMinidump();
-}
-
-bool ExceptionHandler::WriteMinidumpWithException(
-    DWORD requesting_thread_id,
-    EXCEPTION_POINTERS* exinfo,
-    MDRawAssertionInfo* assertion) {
-  // Give user code a chance to approve or prevent writing a minidump.  If the
-  // filter returns false, don't handle the exception at all.  If this method
-  // was called as a result of an exception, returning false 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_ && !filter_(callback_context_, exinfo, assertion)) {
-    return false;
-  }
-
-  bool success = false;
-  if (IsOutOfProcess()) {
-    success = crash_generation_client_->RequestDump(exinfo, assertion);
-  } else {
-    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;
-
-        // 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;
-
-        // Leave room in user_stream_array for a possible assertion info stream.
-        MINIDUMP_USER_STREAM user_stream_array[2];
-        user_stream_array[0].Type = MD_BREAKPAD_INFO_STREAM;
-        user_stream_array[0].BufferSize = sizeof(breakpad_info);
-        user_stream_array[0].Buffer = &breakpad_info;
-
-        MINIDUMP_USER_STREAM_INFORMATION user_streams;
-        user_streams.UserStreamCount = 1;
-        user_streams.UserStreamArray = user_stream_array;
-
-        if (assertion) {
-          user_stream_array[1].Type = MD_ASSERTION_INFO_STREAM;
-          user_stream_array[1].BufferSize = sizeof(MDRawAssertionInfo);
-          user_stream_array[1].Buffer = assertion;
-          ++user_streams.UserStreamCount;
-        }
-
-        MINIDUMP_CALLBACK_INFORMATION callback;
-        MinidumpCallbackContext context;
-        MINIDUMP_CALLBACK_INFORMATION* callback_pointer = NULL;
-        // Older versions of DbgHelp.dll don't correctly put the memory around
-        // the faulting instruction pointer into the minidump. This
-        // callback will ensure that it gets included.
-        if (exinfo) {
-          // Find a memory region of 256 bytes centered on the
-          // faulting instruction pointer.
-          const ULONG64 instruction_pointer = 
-#if defined(_M_IX86)
-            exinfo->ContextRecord->Eip;
-#elif defined(_M_AMD64)
-            exinfo->ContextRecord->Rip;
-#else
-#error Unsupported platform
-#endif
-
-          MEMORY_BASIC_INFORMATION info;
-          if (VirtualQuery(reinterpret_cast<LPCVOID>(instruction_pointer),
-                           &info,
-                           sizeof(MEMORY_BASIC_INFORMATION)) != 0 &&
-              info.State == MEM_COMMIT) {
-            // Attempt to get 128 bytes before and after the instruction
-            // pointer, but settle for whatever's available up to the
-            // boundaries of the memory region.
-            const ULONG64 kIPMemorySize = 256;
-            context.memory_base =
-              (std::max)(reinterpret_cast<ULONG64>(info.BaseAddress),
-                       instruction_pointer - (kIPMemorySize / 2));
-            ULONG64 end_of_range =
-              (std::min)(instruction_pointer + (kIPMemorySize / 2),
-                       reinterpret_cast<ULONG64>(info.BaseAddress)
-                       + info.RegionSize);
-            context.memory_size =
-                static_cast<ULONG>(end_of_range - context.memory_base);
-
-            context.finished = false;
-            callback.CallbackRoutine = MinidumpWriteDumpCallback;
-            callback.CallbackParam = reinterpret_cast<void*>(&context);
-            callback_pointer = &callback;
-          }
-        }
-
-        // The explicit comparison to TRUE avoids a warning (C4800).
-        success = (minidump_write_dump_(GetCurrentProcess(),
-                                        GetCurrentProcessId(),
-                                        dump_file,
-                                        dump_type_,
-                                        exinfo ? &except_info : NULL,
-                                        &user_streams,
-                                        callback_pointer) == TRUE);
-
-        CloseHandle(dump_file);
-      }
-    }
-  }
-
-  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, success);
-  }
-
-  return success;
-}
-
-// static
-BOOL CALLBACK ExceptionHandler::MinidumpWriteDumpCallback(
-    PVOID context,
-    const PMINIDUMP_CALLBACK_INPUT callback_input,
-    PMINIDUMP_CALLBACK_OUTPUT callback_output) {
-  switch (callback_input->CallbackType) {
-  case MemoryCallback: {
-    MinidumpCallbackContext* callback_context =
-        reinterpret_cast<MinidumpCallbackContext*>(context);
-    if (callback_context->finished)
-      return FALSE;
-
-    // Include the specified memory region.
-    callback_output->MemoryBase = callback_context->memory_base;
-    callback_output->MemorySize = callback_context->memory_size;
-    callback_context->finished = true;
-    return TRUE;
-  }
-    
-    // Include all modules.
-  case IncludeModuleCallback:
-  case ModuleCallback:
-    return TRUE;
-
-    // Include all threads.
-  case IncludeThreadCallback:
-  case ThreadCallback:
-    return TRUE;
-
-    // Stop receiving cancel callbacks.
-  case CancelCallback:
-    callback_output->CheckCancel = FALSE;
-    callback_output->Cancel = FALSE;
-    return TRUE;
-  }
-  // Ignore other callback types.
-  return FALSE;
-}
-
-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();
-}
-
-}  // namespace google_breakpad