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Remove __after_morecore_hook

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Remove __after_morecore_hook from the API and finalize the symbol so
that it can no longer be used in new applications.  Old applications
using __after_morecore_hook will find that their hook is no longer
called.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Siddhesh Poyarekar
2021-07-22 18:37:54 +05:30
parent 0075c4f39d
commit 57b07bede1
3 changed files with 6 additions and 24 deletions
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22
malloc/malloc.c
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@ -2041,8 +2041,6 @@ void *weak_variable (*__realloc_hook)
void *weak_variable (*__memalign_hook)
(size_t __alignment, size_t __size, const void *)
= memalign_hook_ini;
void weak_variable (*__after_morecore_hook) (void) = NULL;
/* This function is called from the arena shutdown hook, to free the
thread cache (if it exists). */
static void tcache_thread_shutdown (void);
@ -2668,14 +2666,7 @@ sysmalloc (INTERNAL_SIZE_T nb, mstate av)
LIBC_PROBE (memory_sbrk_more, 2, brk, size);
}
if (brk != (char *) (MORECORE_FAILURE))
{
/* Call the `morecore' hook if necessary. */
void (*hook) (void) = atomic_forced_read (__after_morecore_hook);
if (__builtin_expect (hook != NULL, 0))
(*hook)();
}
else
if (brk == (char *) (MORECORE_FAILURE))
{
/*
If have mmap, try using it as a backup when MORECORE fails or
@ -2814,13 +2805,6 @@ sysmalloc (INTERNAL_SIZE_T nb, mstate av)
correction = 0;
snd_brk = (char *) (MORECORE (0));
}
else
{
/* Call the `morecore' hook if necessary. */
void (*hook) (void) = atomic_forced_read (__after_morecore_hook);
if (__builtin_expect (hook != NULL, 0))
(*hook)();
}
}
/* handle non-contiguous cases */
@ -2979,10 +2963,6 @@ systrim (size_t pad, mstate av)
*/
MORECORE (-extra);
/* Call the `morecore' hook if necessary. */
void (*hook) (void) = atomic_forced_read (__after_morecore_hook);
if (__builtin_expect (hook != NULL, 0))
(*hook)();
new_brk = (char *) (MORECORE (0));
LIBC_PROBE (memory_sbrk_less, 2, new_brk, extra);