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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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13
malloc/malloc.c
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@ -1647,15 +1647,6 @@ typedef struct malloc_chunk *mfastbinptr;
#define set_noncontiguous(M) ((M)->flags |= NONCONTIGUOUS_BIT)
#define set_contiguous(M) ((M)->flags &= ~NONCONTIGUOUS_BIT)
/* ARENA_CORRUPTION_BIT is set if a memory corruption was detected on the
arena. Such an arena is no longer used to allocate chunks. Chunks
allocated in that arena before detecting corruption are not freed. */
#define ARENA_CORRUPTION_BIT (4U)
#define arena_is_corrupt(A) (((A)->flags & ARENA_CORRUPTION_BIT))
#define set_arena_corrupt(A) ((A)->flags |= ARENA_CORRUPTION_BIT)
/* Maximum size of memory handled in fastbins. */
static INTERNAL_SIZE_T global_max_fast;
@ -4727,10 +4718,6 @@ _int_memalign (mstate av, size_t alignment, size_t bytes)
static int
mtrim (mstate av, size_t pad)
{
/* Don't touch corrupt arenas. */
if (arena_is_corrupt (av))
return 0;
/* Ensure initialization/consolidation */
malloc_consolidate (av);