diff options
| -rw-r--r-- | src/malloc/oldmalloc/malloc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/malloc/oldmalloc/malloc.c b/src/malloc/oldmalloc/malloc.c index 52af1975..c0997ad8 100644 --- a/src/malloc/oldmalloc/malloc.c +++ b/src/malloc/oldmalloc/malloc.c @@ -385,6 +385,18 @@ void *realloc(void *p, size_t n) /* Crash on corrupted footer (likely from buffer overflow) */ if (next->psize != self->csize) a_crash(); + if (n < n0) { + int i = bin_index_up(n); + int j = bin_index(n0); + if (i<j && (mal.binmap & (1ULL << i))) + goto copy_realloc; + struct chunk *split = (void *)((char *)self + n); + self->csize = split->psize = n | C_INUSE; + split->csize = next->psize = n0-n | C_INUSE; + __bin_chunk(split); + return CHUNK_TO_MEM(self); + } + lock(mal.split_merge_lock); size_t nsize = next->csize & C_INUSE ? 0 : CHUNK_SIZE(next); |