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authorSzabolcs Nagy <szabolcs.nagy@arm.com>2021-02-04 11:38:23 +0000
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2021-03-26 11:03:06 +0000
commit91e5c439d3130a3c5ff3a3b72adedd50f3f72f76 (patch)
tree9da70206868983387be95edac1af9d871a74b26c /malloc
parent0ae773bba0ed6f5b06f8f2312162d8c0476e6b10 (diff)
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malloc: Simplify __mtag_tag_new_usable
The chunk cannot be a dumped one here.  The only non-obvious cases
are free and realloc which may be called on a dumped area chunk,
but in both cases it can be verified that tagging is already
avoided for dumped area chunks.

Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'malloc')
-rw-r--r--malloc/arena.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/malloc/arena.c b/malloc/arena.c
index bf17be27d4..0777dc70c6 100644
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -298,11 +298,6 @@ __mtag_tag_new_usable (void *ptr)
   if (ptr)
     {
       mchunkptr cp = mem2chunk(ptr);
-      /* This likely will never happen, but we can't handle retagging
-	 chunks from the dumped main arena.  So just return the
-	 existing pointer.  */
-      if (DUMPED_MAIN_ARENA_CHUNK (cp))
-	return ptr;
       ptr = __libc_mtag_tag_region (__libc_mtag_new_tag (ptr),
 				    CHUNK_AVAILABLE_SIZE (cp) - CHUNK_HDR_SZ);
     }