postgres
diff --git a/‎src/include/c.h
Copy file name to clipboardExpand all lines: src/include/c.h
+12Lines changed: 12 additions & 0 deletions b/‎src/include/c.h
Copy file name to clipboardExpand all lines: src/include/c.h
+12Lines changed: 12 additions & 0 deletions
diff --git a/‎src/port/pg_crc32c_sse42.c
Copy file name to clipboardExpand all lines: src/port/pg_crc32c_sse42.c
+1Lines changed: 1 addition & 0 deletions b/‎src/port/pg_crc32c_sse42.c
Copy file name to clipboardExpand all lines: src/port/pg_crc32c_sse42.c
+1Lines changed: 1 addition & 0 deletions
@@ -139,6 +139,18 @@
 #define pg_attribute_unused()
 #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__ >= 8
+#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
 
@@ -18,6 +18,7 @@
 
 #include <nmmintrin.h>
 
+pg_attribute_no_sanitize_alignment()
 pg_crc32c
 pg_comp_crc32c_sse42(pg_crc32c crc, const void *data, size_t len)
 {
Original file line number	Diff line number	Diff line change
`@@ -18,6 +18,7 @@`
`18`	`18`
`19`	`19`	`#include <nmmintrin.h>`
`20`	`20`
	`21`	`+pg_attribute_no_sanitize_alignment()`
`21`	`22`	`pg_crc32c`
`22`	`23`	`pg_comp_crc32c_sse42(pg_crc32c crc, const void *data, size_t len)`
`23`	`24`	`{`