diff options
Diffstat (limited to 'third_party/libwebrtc/rtc_base/zero_memory.cc')
| -rw-r--r-- | third_party/libwebrtc/rtc_base/zero_memory.cc | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/zero_memory.cc b/third_party/libwebrtc/rtc_base/zero_memory.cc new file mode 100644 index 0000000000..b9c5b380ac --- /dev/null +++ b/third_party/libwebrtc/rtc_base/zero_memory.cc @@ -0,0 +1,38 @@ +/* + * Copyright 2017 The WebRTC Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#if defined(WEBRTC_WIN) +#include <windows.h> +#else +#include <string.h> +#endif + +#include "rtc_base/checks.h" +#include "rtc_base/zero_memory.h" + +namespace rtc { + +// Code and comment taken from "OPENSSL_cleanse" of BoringSSL. +void ExplicitZeroMemory(void* ptr, size_t len) { + RTC_DCHECK(ptr || !len); +#if defined(WEBRTC_WIN) + SecureZeroMemory(ptr, len); +#else + memset(ptr, 0, len); +#if !defined(__pnacl__) + /* As best as we can tell, this is sufficient to break any optimisations that + might try to eliminate "superfluous" memsets. If there's an easy way to + detect memset_s, it would be better to use that. */ + __asm__ __volatile__("" : : "r"(ptr) : "memory"); // NOLINT +#endif +#endif // !WEBRTC_WIN +} + +} // namespace rtc |