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