MDEV-17799 Add ASAN-poisoned redzones for MEM_ROOT

post-merge changes

Closes #954

include/my_valgrind.h

@@ -13,8 +13,8 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
 
-#ifndef _my_valgrind_h
-#define _my_valgrind_h
+#ifndef MY_VALGRIND_INCLUDED
+#define MY_VALGRIND_INCLUDED
 
 /* clang -> gcc */
 #ifndef __has_feature
@@ -36,6 +36,7 @@
 # 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)
+# define REDZONE_SIZE 8
 #elif defined(__SANITIZE_ADDRESS__)
 # include <sanitizer/asan_interface.h>
 /* How to do manual poisoning:
@@ -44,21 +45,21 @@
 # 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)
+# define REDZONE_SIZE 8
 #else
 # define MEM_UNDEFINED(a,len) ((void) (a), (void) (len))
 # define MEM_NOACCESS(a,len) ((void) 0)
 # define MEM_CHECK_ADDRESSABLE(a,len) ((void) 0)
 # define MEM_CHECK_DEFINED(a,len) ((void) 0)
+# define REDZONE_SIZE 0
 #endif /* HAVE_VALGRIND */
 
 #ifndef DBUG_OFF
-static const size_t REDZONE_SIZE= 8;
 #define TRASH_FILL(A,B,C) do { const size_t trash_tmp= (B); MEM_UNDEFINED(A, trash_tmp); memset(A, C, trash_tmp); } while (0)
 #else
-static const size_t REDZONE_SIZE= 0;
 #define TRASH_FILL(A,B,C) do { MEM_UNDEFINED((A), (B)); } while (0)
 #endif
 #define TRASH_ALLOC(A,B) do { TRASH_FILL(A,B,0xA5); MEM_UNDEFINED(A,B); } while(0)
 #define TRASH_FREE(A,B) do { TRASH_FILL(A,B,0x8F); MEM_NOACCESS(A,B); } while(0)
 
-#endif /* _my_valgrind_h */
+#endif /* MY_VALGRIND_INCLUDED */