145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
|
/*
|
||
|
|
* 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_
|