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-rw-r--r--third_party/libwebrtc/rtc_base/sanitizer.h144
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diff --git a/third_party/libwebrtc/rtc_base/sanitizer.h b/third_party/libwebrtc/rtc_base/sanitizer.h
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+/*
+ * Copyright 2016 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.
+ */
+
+#ifndef RTC_BASE_SANITIZER_H_
+#define RTC_BASE_SANITIZER_H_
+
+#include <stddef.h> // For size_t.
+
+#ifdef __cplusplus
+#include "absl/meta/type_traits.h"
+#endif
+
+#if defined(__has_feature)
+#if __has_feature(address_sanitizer)
+#define RTC_HAS_ASAN 1
+#endif
+#if __has_feature(memory_sanitizer)
+#define RTC_HAS_MSAN 1
+#endif
+#endif
+#ifndef RTC_HAS_ASAN
+#define RTC_HAS_ASAN 0
+#endif
+#ifndef RTC_HAS_MSAN
+#define RTC_HAS_MSAN 0
+#endif
+
+#if RTC_HAS_ASAN
+#include <sanitizer/asan_interface.h>
+#endif
+#if RTC_HAS_MSAN
+#include <sanitizer/msan_interface.h>
+#endif
+
+#ifdef __has_attribute
+#if __has_attribute(no_sanitize)
+#define RTC_NO_SANITIZE(what) __attribute__((no_sanitize(what)))
+#endif
+#endif
+#ifndef RTC_NO_SANITIZE
+#define RTC_NO_SANITIZE(what)
+#endif
+
+// Ask ASan to mark the memory range [ptr, ptr + element_size * num_elements)
+// as being unaddressable, so that reads and writes are not allowed. ASan may
+// narrow the range to the nearest alignment boundaries.
+static inline void rtc_AsanPoison(const volatile void* ptr,
+ size_t element_size,
+ size_t num_elements) {
+#if RTC_HAS_ASAN
+ ASAN_POISON_MEMORY_REGION(ptr, element_size * num_elements);
+#endif
+}
+
+// Ask ASan to mark the memory range [ptr, ptr + element_size * num_elements)
+// as being addressable, so that reads and writes are allowed. ASan may widen
+// the range to the nearest alignment boundaries.
+static inline void rtc_AsanUnpoison(const volatile void* ptr,
+ size_t element_size,
+ size_t num_elements) {
+#if RTC_HAS_ASAN
+ ASAN_UNPOISON_MEMORY_REGION(ptr, element_size * num_elements);
+#endif
+}
+
+// Ask MSan to mark the memory range [ptr, ptr + element_size * num_elements)
+// as being uninitialized.
+static inline void rtc_MsanMarkUninitialized(const volatile void* ptr,
+ size_t element_size,
+ size_t num_elements) {
+#if RTC_HAS_MSAN
+ __msan_poison(ptr, element_size * num_elements);
+#endif
+}
+
+// Force an MSan check (if any bits in the memory range [ptr, ptr +
+// element_size * num_elements) are uninitialized the call will crash with an
+// MSan report).
+static inline void rtc_MsanCheckInitialized(const volatile void* ptr,
+ size_t element_size,
+ size_t num_elements) {
+#if RTC_HAS_MSAN
+ __msan_check_mem_is_initialized(ptr, element_size * num_elements);
+#endif
+}
+
+#ifdef __cplusplus
+
+namespace rtc {
+namespace sanitizer_impl {
+
+template <typename T>
+constexpr bool IsTriviallyCopyable() {
+ return static_cast<bool>(absl::is_trivially_copy_constructible<T>::value &&
+ (absl::is_trivially_copy_assignable<T>::value ||
+ !std::is_copy_assignable<T>::value) &&
+ absl::is_trivially_destructible<T>::value);
+}
+
+} // namespace sanitizer_impl
+
+template <typename T>
+inline void AsanPoison(const T& mem) {
+ rtc_AsanPoison(mem.data(), sizeof(mem.data()[0]), mem.size());
+}
+
+template <typename T>
+inline void AsanUnpoison(const T& mem) {
+ rtc_AsanUnpoison(mem.data(), sizeof(mem.data()[0]), mem.size());
+}
+
+template <typename T>
+inline void MsanMarkUninitialized(const T& mem) {
+ rtc_MsanMarkUninitialized(mem.data(), sizeof(mem.data()[0]), mem.size());
+}
+
+template <typename T>
+inline T MsanUninitialized(T t) {
+#if RTC_HAS_MSAN
+ // TODO(bugs.webrtc.org/8762): Switch to std::is_trivially_copyable when it
+ // becomes available in downstream projects.
+ static_assert(sanitizer_impl::IsTriviallyCopyable<T>(), "");
+#endif
+ rtc_MsanMarkUninitialized(&t, sizeof(T), 1);
+ return t;
+}
+
+template <typename T>
+inline void MsanCheckInitialized(const T& mem) {
+ rtc_MsanCheckInitialized(mem.data(), sizeof(mem.data()[0]), mem.size());
+}
+
+} // namespace rtc
+
+#endif // __cplusplus
+
+#endif // RTC_BASE_SANITIZER_H_