39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
/*
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* Copyright 2017 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#if defined(WEBRTC_WIN)
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#include <windows.h>
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#else
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#include <string.h>
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#endif
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#include "rtc_base/checks.h"
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#include "rtc_base/zero_memory.h"
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namespace rtc {
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// Code and comment taken from "OPENSSL_cleanse" of BoringSSL.
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void ExplicitZeroMemory(void* ptr, size_t len) {
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RTC_DCHECK(ptr || !len);
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#if defined(WEBRTC_WIN)
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SecureZeroMemory(ptr, len);
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#else
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memset(ptr, 0, len);
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#if !defined(__pnacl__)
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/* As best as we can tell, this is sufficient to break any optimisations that
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might try to eliminate "superfluous" memsets. If there's an easy way to
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detect memset_s, it would be better to use that. */
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__asm__ __volatile__("" : : "r"(ptr) : "memory"); // NOLINT
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#endif
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#endif // !WEBRTC_WIN
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}
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} // namespace rtc
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