blob: 4a9de102b57a6668ca7c2973172150c968058b1e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
commit 2bd2cad9e8a410643e80efa0b15f6f2882e1271b
Author: Roland McGrath <roland@hack.frob.com>
Date: Fri Apr 17 14:29:40 2015 -0700
Avoid confusing compiler with dynamically impossible statically invalid dereference in _dl_close_worker.
---
elf/dl-close.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
--- a/elf/dl-close.c
+++ b/elf/dl-close.c
@@ -641,9 +641,16 @@
DL_UNMAP (imap);
/* Finally, unlink the data structure and free it. */
- if (imap->l_prev != NULL)
- imap->l_prev->l_next = imap->l_next;
- else
+#if DL_NNS == 1
+ /* The assert in the (imap->l_prev == NULL) case gives
+ the compiler license to warn that NS points outside
+ the dl_ns array bounds in that case (as nsid != LM_ID_BASE
+ is tantamount to nsid >= DL_NNS). That should be impossible
+ in this configuration, so just assert about it instead. */
+ assert (nsid == LM_ID_BASE);
+ assert (imap->l_prev != NULL);
+#else
+ if (imap->l_prev == NULL)
{
assert (nsid != LM_ID_BASE);
ns->_ns_loaded = imap->l_next;
@@ -652,6 +659,9 @@
we leave for debuggers to examine. */
r->r_map = (void *) ns->_ns_loaded;
}
+ else
+#endif
+ imap->l_prev->l_next = imap->l_next;
--ns->_ns_nloaded;
if (imap->l_next != NULL)
|
