diff options
| -rw-r--r-- | src/malloc/mallocng/free.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/malloc/mallocng/free.c b/src/malloc/mallocng/free.c index 40745f97..418a085c 100644 --- a/src/malloc/mallocng/free.c +++ b/src/malloc/mallocng/free.c @@ -119,7 +119,11 @@ void free(void *p) if (((uintptr_t)(start-1) ^ (uintptr_t)end) >= 2*PGSZ && g->last_idx) { unsigned char *base = start + (-(uintptr_t)start & (PGSZ-1)); size_t len = (end-base) & -PGSZ; - if (len) madvise(base, len, MADV_FREE); + if (len) { + int e = errno; + madvise(base, len, MADV_FREE); + errno = e; + } } // atomic free without locking if this is neither first or last slot @@ -139,5 +143,9 @@ void free(void *p) wrlock(); struct mapinfo mi = nontrivial_free(g, idx); unlock(); - if (mi.len) munmap(mi.base, mi.len); + if (mi.len) { + int e = errno; + munmap(mi.base, mi.len); + errno = e; + } } |