* [PATCH] fix malloc_usable_size for NULL input
@ 2016-01-31 16:31 Szabolcs Nagy
0 siblings, 0 replies; only message in thread
From: Szabolcs Nagy @ 2016-01-31 16:31 UTC (permalink / raw)
To: musl
the linux man page specifies malloc_usable_size(0) to return 0 and
this is the semantics other implementations follow (jemalloc).
reported by Alexander Monakov.
---
src/malloc/malloc_usable_size.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/malloc/malloc_usable_size.c b/src/malloc/malloc_usable_size.c
index 8cccd9d..6743ea7 100644
--- a/src/malloc/malloc_usable_size.c
+++ b/src/malloc/malloc_usable_size.c
@@ -13,5 +13,5 @@ struct chunk {
size_t malloc_usable_size(void *p)
{
- return CHUNK_SIZE(MEM_TO_CHUNK(p)) - OVERHEAD;
+ return p ? CHUNK_SIZE(MEM_TO_CHUNK(p)) - OVERHEAD : 0;
}
--
2.7.0
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2016-01-31 16:31 [PATCH] fix malloc_usable_size for NULL input Szabolcs Nagy
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