proposal: disable tcache when using malloc_check
Commit Message
This is a fairly trivial change with significant side effects. The
idea is that when one is using malloc_check (via tunables or environ)
correctness and paranoia are favored over performance. Thus, as
tcache bypasses all the malloc_check semantics, it should be disabled
therein so that every malloc/free/etc get the full malloc_check
treatment.
Does anyone have any opinions for or against this idea?
* malloc/hooks.c (__malloc_check_init): Disable tcache.
Comments
* DJ Delorie:
> This is a fairly trivial change with significant side effects. The
> idea is that when one is using malloc_check (via tunables or environ)
> correctness and paranoia are favored over performance. Thus, as
> tcache bypasses all the malloc_check semantics, it should be disabled
> therein so that every malloc/free/etc get the full malloc_check
> treatment.
>
> Does anyone have any opinions for or against this idea?
>
> * malloc/hooks.c (__malloc_check_init): Disable tcache.
I think it's the right thing to do.
Thanks,
Florian
@@ -61,6 +61,7 @@ __malloc_check_init (void)
__free_hook = free_check;
__realloc_hook = realloc_check;
__memalign_hook = memalign_check;
+ do_set_tcache_count (0);
}
/* A simple, standard set of debugging hooks. Overhead is `only' one