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-rw-r--r--malloc/malloc.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 65be277097..64050b4266 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1726,7 +1726,7 @@ struct malloc_chunk {
mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| User data starts here... .
. .
- . (malloc_usable_space() bytes) .
+ . (malloc_usable_size() bytes) .
. |
nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Size of chunk |
@@ -3691,8 +3691,12 @@ public_cALLOc(size_t n, size_t elem_size)
/* Two optional cases in which clearing not necessary */
#if HAVE_MMAP
- if (perturb_byte == 0 && chunk_is_mmapped(p))
- return mem;
+ if (chunk_is_mmapped (p))
+ {
+ if (__builtin_expect (perturb_byte, 0))
+ MALLOC_ZERO (mem, sz);
+ return mem;
+ }
#endif
csz = chunksize(p);