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* [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
@ 2012-01-11 13:06 ` rguenth at gcc dot gnu.org
2012-09-29 22:25 ` tg at mirbsd dot org
` (7 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-01-11 13:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Target|powerpc-* |powerpc-*-*, x86_64-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-01-11
Ever Confirmed|0 |1
Known to fail| |4.6.3
Severity|normal |enhancement
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-11 13:06:21 UTC ---
Confirmed.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
2012-01-11 13:06 ` [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow rguenth at gcc dot gnu.org
@ 2012-09-29 22:25 ` tg at mirbsd dot org
2021-05-14 9:45 ` [Bug middle-end/21161] [9/10/11/12 Regression] " jakub at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: tg at mirbsd dot org @ 2012-09-29 22:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Thorsten Glaser <tg at mirbsd dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tg at mirbsd dot org
--- Comment #4 from Thorsten Glaser <tg at mirbsd dot org> 2012-09-29 22:25:14 UTC ---
Confirmed, happens in mksh now (but not with 4.6 or 4.7), reduced testcase:
tg@zigo:~/b/mksh-40.9.20120630 $ /usr/lib/gcc-snapshot/bin/gcc --version
gcc (Debian 20120915-1) 4.8.0 20120915 (experimental) [trunk revision 191353]
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
tg@zigo:~/b/mksh-40.9.20120630 $ /usr/lib/gcc-snapshot/bin/gcc -O2 -Wextra -c
t.c
t.c: In function 'hereinval':
t.c:12:27: warning: argument 'content' might be clobbered by 'longjmp' or
'vfork' [-Wclobbered]
int hereinval(const char *content, int sub, char **resbuf) {
^
tg@zigo:~/b/mksh-40.9.20120630 $ cat t.c
#include <setjmp.h>
#include <string.h>
struct source {
int foo;
const char *str;
} *source = NULL;
jmp_buf jb;
extern char *evalstr(void);
extern struct source *pushs(void);
extern void newenv(void);
extern void quitenv(void);
int hereinval(const char *content, int sub, char **resbuf) {
const char *ccp;
struct source *s, *osource;
osource = source;
newenv();
if (setjmp(jb)) {
source = osource;
quitenv();
return (-2);
}
if (sub) {
s = pushs();
s->str = content;
source = s;
/* ... */
ccp = evalstr();
source = osource;
} else
ccp = content;
*resbuf = strdup(ccp);
return (0);
}
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [9/10/11/12 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
2012-01-11 13:06 ` [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow rguenth at gcc dot gnu.org
2012-09-29 22:25 ` tg at mirbsd dot org
@ 2021-05-14 9:45 ` jakub at gcc dot gnu.org
2021-06-01 8:03 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-14 9:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.5 |9.4
--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [9/10/11/12 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2021-05-14 9:45 ` [Bug middle-end/21161] [9/10/11/12 Regression] " jakub at gcc dot gnu.org
@ 2021-06-01 8:03 ` rguenth at gcc dot gnu.org
2022-05-27 9:33 ` [Bug middle-end/21161] [10/11/12/13 " rguenth at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-06-01 8:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.4 |9.5
--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9.4 is being released, retargeting bugs to GCC 9.5.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [10/11/12/13 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2021-06-01 8:03 ` rguenth at gcc dot gnu.org
@ 2022-05-27 9:33 ` rguenth at gcc dot gnu.org
2022-06-28 10:28 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 9:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [10/11/12/13 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2022-05-27 9:33 ` [Bug middle-end/21161] [10/11/12/13 " rguenth at gcc dot gnu.org
@ 2022-06-28 10:28 ` jakub at gcc dot gnu.org
2023-03-23 19:44 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
8 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [10/11/12/13 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2022-06-28 10:28 ` jakub at gcc dot gnu.org
@ 2023-03-23 19:44 ` pinskia at gcc dot gnu.org
2023-05-19 22:19 ` [Bug middle-end/21161] [10/11/12/13/14 " eggert at cs dot ucla.edu
2023-07-07 10:28 ` [Bug middle-end/21161] [11/12/13/14 " rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-03-23 19:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
--- Comment #25 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #14)
For the testcase in comment #14, we don't get a warning since GCC 7 but the
original testcase we still get a warning on the trunk.
I have not looked into why though.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [10/11/12/13/14 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2023-03-23 19:44 ` pinskia at gcc dot gnu.org
@ 2023-05-19 22:19 ` eggert at cs dot ucla.edu
2023-07-07 10:28 ` [Bug middle-end/21161] [11/12/13/14 " rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: eggert at cs dot ucla.edu @ 2023-05-19 22:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Paul Eggert <eggert at cs dot ucla.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eggert at cs dot ucla.edu
--- Comment #26 from Paul Eggert <eggert at cs dot ucla.edu> ---
Created attachment 55122
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55122&action=edit
GCC bug 21161 as triggered by GNU diffutils
I ran into a similar problem when compiling GNU diffutils with gcc (GCC) 13.1.1
20230511 (Red Hat 13.1.1-2) on x86.64. Here is a stripped-down illustrating of
the diffutils problem. Compile the attached program with:
gcc -O2 -W -S pr21161.i
The output, which is a false positive, is:
pr21161.i: In function ‘find_dir_file_pathname’:
pr21161.i:22:15: warning: variable ‘match’ might be clobbered by ‘longjmp’ or
‘vfork’ [-Wclobbered]
22 | char const *match = file;
| ^~~~~
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/21161] [11/12/13/14 Regression] "clobbered by longjmp" warning ignores the data flow
[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2023-05-19 22:19 ` [Bug middle-end/21161] [10/11/12/13/14 " eggert at cs dot ucla.edu
@ 2023-07-07 10:28 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21161
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2023-07-07 10:28 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-21161-4@http.gcc.gnu.org/bugzilla/>
2012-01-11 13:06 ` [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow rguenth at gcc dot gnu.org
2012-09-29 22:25 ` tg at mirbsd dot org
2021-05-14 9:45 ` [Bug middle-end/21161] [9/10/11/12 Regression] " jakub at gcc dot gnu.org
2021-06-01 8:03 ` rguenth at gcc dot gnu.org
2022-05-27 9:33 ` [Bug middle-end/21161] [10/11/12/13 " rguenth at gcc dot gnu.org
2022-06-28 10:28 ` jakub at gcc dot gnu.org
2023-03-23 19:44 ` pinskia at gcc dot gnu.org
2023-05-19 22:19 ` [Bug middle-end/21161] [10/11/12/13/14 " eggert at cs dot ucla.edu
2023-07-07 10:28 ` [Bug middle-end/21161] [11/12/13/14 " rguenth at gcc dot gnu.org
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