diff options
| -rw-r--r-- | malloc/hooks.c | 10 | ||||
| -rw-r--r-- | malloc/malloc.c | 10 |
2 files changed, 8 insertions, 12 deletions
diff --git a/malloc/hooks.c b/malloc/hooks.c index d8e304c31c..9474e199c3 100644 --- a/malloc/hooks.c +++ b/malloc/hooks.c @@ -262,11 +262,10 @@ free_check (void *mem, const void *caller) int err = errno; -#ifdef USE_MTAG /* Quickly check that the freed pointer matches the tag for the memory. This gives a useful double-free detection. */ - *(volatile char *)mem; -#endif + if (__glibc_unlikely (mtag_enabled)) + *(volatile char *)mem; __libc_lock_lock (main_arena.mutex); p = mem2chunk_check (mem, NULL); @@ -310,11 +309,10 @@ realloc_check (void *oldmem, size_t bytes, const void *caller) return NULL; } -#ifdef USE_MTAG /* Quickly check that the freed pointer matches the tag for the memory. This gives a useful double-free detection. */ - *(volatile char *)oldmem; -#endif + if (__glibc_unlikely (mtag_enabled)) + *(volatile char *)oldmem; __libc_lock_lock (main_arena.mutex); const mchunkptr oldp = mem2chunk_check (oldmem, &magic_p); diff --git a/malloc/malloc.c b/malloc/malloc.c index 849bd8e2c9..36583120ce 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -3286,11 +3286,10 @@ __libc_free (void *mem) if (mem == 0) /* free(0) has no effect */ return; -#ifdef USE_MTAG /* Quickly check that the freed pointer matches the tag for the memory. This gives a useful double-free detection. */ - *(volatile char *)mem; -#endif + if (__glibc_unlikely (mtag_enabled)) + *(volatile char *)mem; int err = errno; @@ -3352,11 +3351,10 @@ __libc_realloc (void *oldmem, size_t bytes) if (oldmem == 0) return __libc_malloc (bytes); -#ifdef USE_MTAG /* Perform a quick check to ensure that the pointer's tag matches the memory's tag. */ - *(volatile char*) oldmem; -#endif + if (__glibc_unlikely (mtag_enabled)) + *(volatile char*) oldmem; /* chunk corresponding to oldmem */ const mchunkptr oldp = mem2chunk (oldmem); |