Index: lib/asan/asan_interceptors.cc =================================================================== --- lib/asan/asan_interceptors.cc +++ lib/asan/asan_interceptors.cc @@ -725,11 +725,13 @@ InitializeCommonInterceptors(); // Intercept mem* functions. - ASAN_INTERCEPT_FUNC(memcpy); + ASAN_INTERCEPT_FUNC(memmove); ASAN_INTERCEPT_FUNC(memset); if (PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE) { // In asan, REAL(memmove) is not used, but it is used in msan. - ASAN_INTERCEPT_FUNC(memmove); + ASAN_INTERCEPT_FUNC(memcpy); + } else { + ASSIGN_REAL(memcpy, memmove); } CHECK(REAL(memcpy)); Index: lib/asan/tests/asan_str_test.cc =================================================================== --- lib/asan/tests/asan_str_test.cc +++ lib/asan/tests/asan_str_test.cc @@ -457,12 +457,14 @@ #if !defined(__APPLE__) || !defined(MAC_OS_X_VERSION_10_7) || \ (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7) // Check "memcpy". Use Ident() to avoid inlining. +#if PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE memset(str, 'z', size); Ident(memcpy)(str + 1, str + 11, 10); Ident(memcpy)(str, str, 0); EXPECT_DEATH(Ident(memcpy)(str, str + 14, 15), OverlapErrorMessage("memcpy")); EXPECT_DEATH(Ident(memcpy)(str + 14, str, 15), OverlapErrorMessage("memcpy")); #endif +#endif // We do not treat memcpy with to==from as a bug. // See http://llvm.org/bugs/show_bug.cgi?id=11763. Index: lib/interception/interception.h =================================================================== --- lib/interception/interception.h +++ lib/interception/interception.h @@ -158,10 +158,12 @@ namespace __interception { \ extern FUNC_TYPE(func) PTR_TO_REAL(func); \ } +# define ASSIGN_REAL(dst, src) REAL(dst) = REAL(src) #else // __APPLE__ # define REAL(x) x # define DECLARE_REAL(ret_type, func, ...) \ extern "C" ret_type func(__VA_ARGS__); +# define ASSIGN_REAL(x, y) #endif // __APPLE__ #define DECLARE_REAL_AND_INTERCEPTOR(ret_type, func, ...) \ Index: lib/sanitizer_common/sanitizer_common_interceptors.inc =================================================================== --- lib/sanitizer_common/sanitizer_common_interceptors.inc +++ lib/sanitizer_common/sanitizer_common_interceptors.inc @@ -663,12 +663,16 @@ return internal_memchr(s, c, n); void *ctx; COMMON_INTERCEPTOR_ENTER(ctx, memchr, s, c, n); +#ifdef SANITIZER_WINDOWS void *res; if (REAL(memchr)) { res = REAL(memchr)(s, c, n); } else { res = internal_memchr(s, c, n); } +#else + void *res = REAL(memchr)(s, c, n); +#endif uptr len = res ? (char *)res - (const char *)s + 1 : n; COMMON_INTERCEPTOR_READ_RANGE(ctx, s, len); return res;