add support for ASAN instrumentation

include/my_valgrind.h

@@ -25,7 +25,13 @@
 # define MEM_NOACCESS(a,len) VALGRIND_MAKE_MEM_NOACCESS(a,len)
 # define MEM_CHECK_ADDRESSABLE(a,len) VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,len)
 # define MEM_CHECK_DEFINED(a,len) VALGRIND_CHECK_MEM_IS_DEFINED(a,len)
-#else /* HAVE_VALGRIND */
+#elif defined(__SANITIZE_ADDRESS__)
+# include <sanitizer/asan_interface.h>
+# define MEM_UNDEFINED(a,len) ASAN_UNPOISON_MEMORY_REGION(a,len)
+# define MEM_NOACCESS(a,len) ASAN_POISON_MEMORY_REGION(a,len)
+# define MEM_CHECK_ADDRESSABLE(a,len) ((void) 0)
+# define MEM_CHECK_DEFINED(a,len) ((void) 0)
+#else
 # define MEM_UNDEFINED(a,len) ((void) 0)
 # define MEM_NOACCESS(a,len) ((void) 0)
 # define MEM_CHECK_ADDRESSABLE(a,len) ((void) 0)
@@ -35,9 +41,8 @@
 #ifndef DBUG_OFF
 #define TRASH_FILL(A,B,C) do { memset(A, C, B); MEM_UNDEFINED(A, B); } while (0)
 #else
-#define TRASH_FILL(A,B,C) do{ MEM_CHECK_ADDRESSABLE(A,B);MEM_UNDEFINED(A,B);} while (0)
+#define TRASH_FILL(A,B,C) do { MEM_CHECK_ADDRESSABLE(A,B);MEM_UNDEFINED(A,B);} while (0)
 #endif
 #define TRASH_ALLOC(A,B) TRASH_FILL(A,B,0xA5)
 #define TRASH_FREE(A,B) TRASH_FILL(A,B,0x8F)
 #define TRASH(A,B) TRASH_FREE(A,B)
-