diff options
Diffstat (limited to 'malloc/arena.c')
| -rw-r--r-- | malloc/arena.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/malloc/arena.c b/malloc/arena.c index f24e76c4f6..b209e3b7cd 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -19,6 +19,9 @@ #include <stdbool.h> +/* Get the implementation for check_may_shrink_heap. */ +#include <malloc-sysdep.h> + /* Compile-time constants. */ #define HEAP_MIN_SIZE (32*1024) @@ -621,9 +624,9 @@ shrink_heap(heap_info *h, long diff) new_size = (long)h->size - diff; if(new_size < (long)sizeof(*h)) return -1; - /* Try to re-map the extra heap space freshly to save memory, and - make it inaccessible. */ - if (__builtin_expect (__libc_enable_secure, 0)) + /* Try to re-map the extra heap space freshly to save memory, and make it + inaccessible. See malloc-sysdep.h to know when this is true. */ + if (__builtin_expect (check_may_shrink_heap (), 0)) { if((char *)MMAP((char *)h + new_size, diff, PROT_NONE, MAP_FIXED) == (char *) MAP_FAILED) |