blob: 6681da119964ee1574169431612571c5380f8611 [file] [log] [blame]
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_WIN_COM_INIT_CHECK_HOOK_H_
#define BASE_WIN_COM_INIT_CHECK_HOOK_H_
#include "base/logging.h"
#include "base/macros.h"
#include "build_config.h"
namespace base {
namespace win {
// Hotpatching is only supported in Intel 32-bit x86 processors because Windows
// binaries contain a convenient 2 byte hotpatch noop. This doesn't exist in
// 64-bit binaries.
#if DCHECK_IS_ON() && defined(ARCH_CPU_X86_FAMILY) && \
defined(ARCH_CPU_32_BITS) && !defined(GOOGLE_CHROME_BUILD) && \
!defined(OFFICIAL_BUILD) && \
!defined(COM_INIT_CHECK_HOOK_DISABLED) // See crbug/737090 for details.
#define COM_INIT_CHECK_HOOK_ENABLED
#endif
// Manages the installation of consistency DCHECK hooks of COM APIs that require
// COM to be initialized and only works if COM_INIT_CHECK_HOOK_ENABLED is
// defined. Care should be taken if this is instantiated with multiple threads
// running as the hotpatch does not apply atomically.
class ComInitCheckHook {
public:
ComInitCheckHook();
~ComInitCheckHook();
private:
DISALLOW_COPY_AND_ASSIGN(ComInitCheckHook);
};
} // namespace win
} // namespace base
#endif // BASE_WIN_COM_INIT_CHECK_HOOK_H_