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malloc: Remove corrupt arena flag

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This is no longer needed because we now abort immediately
once heap corruption is detected.
This commit is contained in:
Florian Weimer
2017-08-30 17:16:08 +02:00
parent ac3ed168d0
commit a9da0bb266
3 changed files with 10 additions and 31 deletions
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20
malloc/arena.c
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@ -116,7 +116,7 @@ int __malloc_initialized = -1;
} while (0)
#define arena_lock(ptr, size) do { \
if (ptr && !arena_is_corrupt (ptr)) \
if (ptr) \
__libc_lock_lock (ptr->mutex); \
else \
ptr = arena_get2 ((size), NULL); \
@ -832,7 +832,7 @@ reused_arena (mstate avoid_arena)
result = next_to_use;
do
{
if (!arena_is_corrupt (result) && !__libc_lock_trylock (result->mutex))
if (!__libc_lock_trylock (result->mutex))
goto out;
/* FIXME: This is a data race, see _int_new_arena. */
@ -845,18 +845,6 @@ reused_arena (mstate avoid_arena)
if (result == avoid_arena)
result = result->next;
/* Make sure that the arena we get is not corrupted. */
mstate begin = result;
while (arena_is_corrupt (result) || result == avoid_arena)
{
result = result->next;
if (result == begin)
/* We looped around the arena list. We could not find any
arena that was either not corrupted or not the one we
wanted to avoid. */
return NULL;
}
/* No arena available without contention. Wait for the next in line. */
LIBC_PROBE (memory_arena_reuse_wait, 3, &result->mutex, result, avoid_arena);
__libc_lock_lock (result->mutex);
@ -953,10 +941,6 @@ arena_get_retry (mstate ar_ptr, size_t bytes)
if (ar_ptr != &main_arena)
{
__libc_lock_unlock (ar_ptr->mutex);
/* Don't touch the main arena if it is corrupt. */
if (arena_is_corrupt (&main_arena))
return NULL;
ar_ptr = &main_arena;
__libc_lock_lock (ar_ptr->mutex);
}