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* [Bug middle-end/46119] New: -fsplit-stack -fstack-protector-all - code crashes when passing large struct via stack
@ 2010-10-21 16:04 zsojka at seznam dot cz
2012-02-02 17:27 ` [Bug middle-end/46119] " pinskia at gcc dot gnu.org
2021-08-08 22:12 ` [Bug middle-end/46119] -fsplit-stack " pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: zsojka at seznam dot cz @ 2010-10-21 16:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46119
Summary: -fsplit-stack -fstack-protector-all - code crashes
when passing large struct via stack
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zsojka@seznam.cz
Created attachment 22108
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22108
reduced testcase
Output:
$ gcc -fsplit-stack -fstack-protector-all pr46119.c
$ ./a.out
Segmentation fault
Tested revisions:
r165768 - fail
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/46119] -fsplit-stack -fstack-protector-all - code crashes when passing large struct via stack
2010-10-21 16:04 [Bug middle-end/46119] New: -fsplit-stack -fstack-protector-all - code crashes when passing large struct via stack zsojka at seznam dot cz
@ 2012-02-02 17:27 ` pinskia at gcc dot gnu.org
2021-08-08 22:12 ` [Bug middle-end/46119] -fsplit-stack " pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-02-02 17:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46119
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-02-02 17:26:40 UTC ---
This works for me on the trunk
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/46119] -fsplit-stack - code crashes when passing large struct via stack
2010-10-21 16:04 [Bug middle-end/46119] New: -fsplit-stack -fstack-protector-all - code crashes when passing large struct via stack zsojka at seznam dot cz
2012-02-02 17:27 ` [Bug middle-end/46119] " pinskia at gcc dot gnu.org
@ 2021-08-08 22:12 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-08 22:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46119
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-08-08
Known to work| |4.8.0, 4.8.5
Summary|-fsplit-stack |-fsplit-stack - code
|-fstack-protector-all - |crashes when passing large
|code crashes when passing |struct via stack
|large struct via stack |
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Known to fail| |4.9.0
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-fsplit-stack is enough. It worked in GCC 4.7.x and 4.8.x but broke again in
4.9.0.
The one where it worked main had (clang also has this):
leaq -32776(%rsp), %r11
cmpq %fs:112, %r11
jae .L6
The one where it fails has:
leaq -16392(%rsp), %r11
cmpq %fs:112, %r11
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-10-21 16:04 [Bug middle-end/46119] New: -fsplit-stack -fstack-protector-all - code crashes when passing large struct via stack zsojka at seznam dot cz
2012-02-02 17:27 ` [Bug middle-end/46119] " pinskia at gcc dot gnu.org
2021-08-08 22:12 ` [Bug middle-end/46119] -fsplit-stack " pinskia at gcc dot gnu.org
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