--- Comment #4 from akr at m17n dot org 2007-05-07 06:56 ---
I think the problem can be fixed by alloca or setjmp.
* alloca extends a stack as the old stack backchain will not crashed, or
* setjmp saves the stack backchain and longjmp restore it.
I'm not sure that which should be
--- Comment #3 from geoffk at gcc dot gnu dot org 2007-04-25 19:49 ---
I'm fairly sure this is in fact a bug in GCC. The problem is that in a routine
which uses setjmp, alloca() must ensure that the previous stack backchain is
preserved, which means it needs to allocate enough space
--
geoffk at gcc dot gnu dot org changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last
--- Comment #2 from pinskia at gcc dot gnu dot org 2006-10-29 21:29 ---
This is not a bug in GCC but rather longjump/setjmp on Darwin, report this bug
to Apple.
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pinskia at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #1 from akr at m17n dot org 2006-06-29 01:49 ---
I found a way to reproduce the bus error with -O2 as well as -O0.
% cat z.c
#include setjmp.h
jmp_buf env;
int i;
int main()
{
if (setjmp(env) == 0) {
char *p = __builtin_alloca(1024);
for (i = 0; i 1024; i++) {
