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authorGravatar Abseil Team <absl-team@google.com>2018-07-18 11:29:01 -0700
committerGravatar Ashley Hedberg <ahedberg@google.com>2018-07-19 08:54:14 -0400
commit2c5af55ed34850d8b7dd46177c8ca53fdfda920e (patch)
tree99d25b10270c1bc8fa184c3d5df8855b2deb3bbe /absl/base/internal/unaligned_access.h
parent44aa275286baf97fc13529aca547a88b180beb08 (diff)
Export of internal Abseil changes.
-- 60bc1e62580e0ff352a92c785f29550c2000447d by Xiaoyi Zhang <zhangxy@google.com>: Import Github PR https://github.com/abseil/abseil-cpp/pull/143. absl/synchronization/internal/kernel_timeout.h uses INFINITE macro that comes from windows.h that is included by winsock2.h that is included by absl/time/time.h. This internal header will be included by public header. It should not depend on windows.h. PiperOrigin-RevId: 205109009 -- 1617f0a333a8030e4e4c0bc1eef71f4a5fe9874d by Abseil Team <absl-team@google.com>: Internal change PiperOrigin-RevId: 205101804 -- 8dce298b8c96c12c423943a366a4d92a554366c4 by Chris Kennelly <ckennelly@google.com>: Define UNALIGNED_LOAD/STORE macros for UNDEFINED_BEHAVIOR_SANITIZER. When using UBSan in trap mode (that is, without the ubsan runtime library), the x86 macros can cause alignment errors as they assume unaligned loads/stores are permitted. The macros defined in the presence of {ADDRESS,THREAD,MEMORY}_SANITIZER require the runtime library. PiperOrigin-RevId: 205096794 GitOrigin-RevId: 60bc1e62580e0ff352a92c785f29550c2000447d Change-Id: I65a6cc86a711796c9d3a605310d67795b9f76ce9
Diffstat (limited to 'absl/base/internal/unaligned_access.h')
-rw-r--r--absl/base/internal/unaligned_access.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/absl/base/internal/unaligned_access.h b/absl/base/internal/unaligned_access.h
index c5724362..5c7517ab 100644
--- a/absl/base/internal/unaligned_access.h
+++ b/absl/base/internal/unaligned_access.h
@@ -103,6 +103,47 @@ inline void UnalignedStore64(void *p, uint64_t v) {
#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \
(absl::UnalignedStore64(_p, _val))
+#elif defined(UNDEFINED_BEHAVIOR_SANITIZER)
+
+namespace absl {
+
+inline uint16_t UnalignedLoad16(const void *p) {
+ uint16_t t;
+ memcpy(&t, p, sizeof t);
+ return t;
+}
+
+inline uint32_t UnalignedLoad32(const void *p) {
+ uint32_t t;
+ memcpy(&t, p, sizeof t);
+ return t;
+}
+
+inline uint64_t UnalignedLoad64(const void *p) {
+ uint64_t t;
+ memcpy(&t, p, sizeof t);
+ return t;
+}
+
+inline void UnalignedStore16(void *p, uint16_t v) { memcpy(p, &v, sizeof v); }
+
+inline void UnalignedStore32(void *p, uint32_t v) { memcpy(p, &v, sizeof v); }
+
+inline void UnalignedStore64(void *p, uint64_t v) { memcpy(p, &v, sizeof v); }
+
+} // namespace absl
+
+#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) (absl::UnalignedLoad16(_p))
+#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) (absl::UnalignedLoad32(_p))
+#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) (absl::UnalignedLoad64(_p))
+
+#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \
+ (absl::UnalignedStore16(_p, _val))
+#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \
+ (absl::UnalignedStore32(_p, _val))
+#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \
+ (absl::UnalignedStore64(_p, _val))
+
#elif defined(__x86_64__) || defined(_M_X64) || defined(__i386) || \
defined(_M_IX86) || defined(__ppc__) || defined(__PPC__) || \
defined(__ppc64__) || defined(__PPC64__)