diff options
| -rw-r--r-- | src/include/c.h | 12 | ||||
| -rw-r--r-- | src/port/pg_crc32c_sse42.c | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h index ae978830daf..a86342093eb 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -133,6 +133,18 @@ #endif /* + * Place this macro before functions that should be allowed to make misaligned + * accesses. Think twice before using it on non-x86-specific code! + * Testing can be done with "-fsanitize=alignment -fsanitize-trap=alignment" + * on clang, or "-fsanitize=alignment -fno-sanitize-recover=alignment" on gcc. + */ +#if __clang_major__ >= 7 || __GNUC__ >= 5 +#define pg_attribute_no_sanitize_alignment() __attribute__((no_sanitize("alignment"))) +#else +#define pg_attribute_no_sanitize_alignment() +#endif + +/* * Append PG_USED_FOR_ASSERTS_ONLY to definitions of variables that are only * used in assert-enabled builds, to avoid compiler warnings about unused * variables in assert-disabled builds. diff --git a/src/port/pg_crc32c_sse42.c b/src/port/pg_crc32c_sse42.c index 3b94a7388ab..10fc01e1f06 100644 --- a/src/port/pg_crc32c_sse42.c +++ b/src/port/pg_crc32c_sse42.c @@ -18,6 +18,7 @@ #include "port/pg_crc32c.h" +pg_attribute_no_sanitize_alignment() pg_crc32c pg_comp_crc32c_sse42(pg_crc32c crc, const void *data, size_t len) { |