public inbox for glibc-cvs@sourceware.org
help / color / mirror / Atom feed
* [glibc] string: Fix GCC 11 `-Werror=stringop-overread' error
@ 2020-09-07 17:01 Joseph Myers
0 siblings, 0 replies; only message in thread
From: Joseph Myers @ 2020-09-07 17:01 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3357087b2a95a33dbb38579c9bf7b23f1f85c7a1
commit 3357087b2a95a33dbb38579c9bf7b23f1f85c7a1
Author: Maciej W. Rozycki <macro@wdc.com>
Date: Mon Aug 31 14:26:47 2020 +0100
string: Fix GCC 11 `-Werror=stringop-overread' error
Fix a compilation error:
In function '__rawmemchr',
inlined from '__rawmemchr' at rawmemchr.c:27:1:
rawmemchr.c:36:12: error: 'memchr' specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Werror=stringop-overread]
36 | return memchr (s, c, (size_t)-1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../o-iterator.mk:9: recipe for target '.../string/rawmemchr.o' failed
introduced with GCC 11 commit d14c547abd48 ("Add -Wstringop-overread
for reading past the end by string functions.").
Diff:
---
string/rawmemchr.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/string/rawmemchr.c b/string/rawmemchr.c
index b62d285d7e..d6ce8209be 100644
--- a/string/rawmemchr.c
+++ b/string/rawmemchr.c
@@ -31,6 +31,10 @@ RAWMEMCHR (const void *s, int c)
/* GCC 8 warns about the size passed to memchr being larger than
PTRDIFF_MAX; the use of SIZE_MAX is deliberate here. */
DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=");
+#endif
+#if __GNUC_PREREQ (11, 0)
+ /* Likewise GCC 11, with a different warning option. */
+ DIAG_IGNORE_NEEDS_COMMENT (11, "-Wstringop-overread");
#endif
if (c != '\0')
return memchr (s, c, (size_t)-1);
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2020-09-07 17:01 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-07 17:01 [glibc] string: Fix GCC 11 `-Werror=stringop-overread' error Joseph Myers
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).