diff options
Diffstat (limited to 'src/malloc/malloc.c')
| -rw-r--r-- | src/malloc/malloc.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/malloc/malloc.c b/src/malloc/malloc.c index d9a30fe4..3c08c41e 100644 --- a/src/malloc/malloc.c +++ b/src/malloc/malloc.c @@ -216,9 +216,14 @@ static int init_malloc() static int adjust_size(size_t *n) { /* Result of pointer difference must fit in ptrdiff_t. */ - if (*n > PTRDIFF_MAX - SIZE_ALIGN - PAGE_SIZE) { - errno = ENOMEM; - return -1; + if (*n-1 > PTRDIFF_MAX - SIZE_ALIGN - PAGE_SIZE) { + if (*n) { + errno = ENOMEM; + return -1; + } else { + *n = SIZE_ALIGN; + return 0; + } } *n = (*n + OVERHEAD + SIZE_ALIGN - 1) & SIZE_MASK; return 0; @@ -325,7 +330,7 @@ void *malloc(size_t n) struct chunk *c; int i, j; - if (!n || adjust_size(&n) < 0) return 0; + if (adjust_size(&n) < 0) return 0; if (n > MMAP_THRESHOLD) { size_t len = n + PAGE_SIZE - 1 & -PAGE_SIZE; @@ -377,7 +382,6 @@ void *realloc(void *p, size_t n) void *new; if (!p) return malloc(n); - else if (!n) return free(p), (void *)0; if (adjust_size(&n) < 0) return 0; |