diff options
Diffstat (limited to 'absl/base/internal/unaligned_access.h')
-rw-r--r-- | absl/base/internal/unaligned_access.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/absl/base/internal/unaligned_access.h b/absl/base/internal/unaligned_access.h index 080c197c..093dd9b4 100644 --- a/absl/base/internal/unaligned_access.h +++ b/absl/base/internal/unaligned_access.h @@ -31,70 +31,6 @@ // The unaligned API is C++ only. The declarations use C++ features // (namespaces, inline) which are absent or incompatible in C. #if defined(__cplusplus) - -#if defined(ABSL_HAVE_ADDRESS_SANITIZER) || \ - defined(ABSL_HAVE_THREAD_SANITIZER) || defined(ABSL_HAVE_MEMORY_SANITIZER) -// Consider we have an unaligned load/store of 4 bytes from address 0x...05. -// AddressSanitizer will treat it as a 3-byte access to the range 05:07 and -// will miss a bug if 08 is the first unaddressable byte. -// ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will -// miss a race between this access and some other accesses to 08. -// MemorySanitizer will correctly propagate the shadow on unaligned stores -// and correctly report bugs on unaligned loads, but it may not properly -// update and report the origin of the uninitialized memory. -// For all three tools, replacing an unaligned access with a tool-specific -// callback solves the problem. - -#include <sanitizer/common_interface_defs.h> - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -inline uint16_t UnalignedLoad16(const void *p) { - return __sanitizer_unaligned_load16(p); -} - -inline uint32_t UnalignedLoad32(const void *p) { - return __sanitizer_unaligned_load32(p); -} - -inline uint64_t UnalignedLoad64(const void *p) { - return __sanitizer_unaligned_load64(p); -} - -inline void UnalignedStore16(void *p, uint16_t v) { - __sanitizer_unaligned_store16(p, v); -} - -inline void UnalignedStore32(void *p, uint32_t v) { - __sanitizer_unaligned_store32(p, v); -} - -inline void UnalignedStore64(void *p, uint64_t v) { - __sanitizer_unaligned_store64(p, v); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \ - (absl::base_internal::UnalignedLoad16(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \ - (absl::base_internal::UnalignedLoad32(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \ - (absl::base_internal::UnalignedLoad64(_p)) - -#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \ - (absl::base_internal::UnalignedStore16(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \ - (absl::base_internal::UnalignedStore32(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \ - (absl::base_internal::UnalignedStore64(_p, _val)) - -#else - namespace absl { ABSL_NAMESPACE_BEGIN namespace base_internal { @@ -141,8 +77,6 @@ ABSL_NAMESPACE_END #define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \ (absl::base_internal::UnalignedStore64(_p, _val)) -#endif - #endif // defined(__cplusplus), end of unaligned API #endif // ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_ |