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[PATCH] malloc_usable_size: Use correct size for dumped fake mapped chunks
- From: fweimer at redhat dot com (Florian Weimer)
- To: libc-alpha at sourceware dot org
- Date: Fri, 10 Jun 2016 10:05:07 +0200
- Subject: [PATCH] malloc_usable_size: Use correct size for dumped fake mapped chunks
- Authentication-results: sourceware.org; auth=none
The adjustment for the size computation in commit
1e8a8875d69e36d2890b223ffe8853a8ff0c9512 is needed in
malloc_usable_size, too.
2016-06-10 Florian Weimer <fweimer@redhat.com>
* malloc/malloc.c (musable): Return correct size for dumped fake
mmapped chunk.
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 6f77d37..a077335 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -4608,7 +4608,12 @@ musable (void *mem)
return malloc_check_get_size (p);
if (chunk_is_mmapped (p))
- return chunksize (p) - 2 * SIZE_SZ;
+ {
+ if (DUMPED_MAIN_ARENA_CHUNK (p))
+ return chunksize (p) - SIZE_SZ;
+ else
+ return chunksize (p) - 2 * SIZE_SZ;
+ }
else if (inuse (p))
return chunksize (p) - SIZE_SZ;
}