A completely different way to go about getting the stacksize on Unix is by
actually committing the space once in a while. Something like (typed in as I'm
making it up):
STACK_INCREMENT=128000
prober() {
char space[STACK_INCREMENT];
space[0] = 1;
/* or maybe for(i=0;i<STACK_INCREMENT; i+=PAGESIZE) or so */
space[STACK_INCREMENT-1] = 1;
}
jmp_buf buf;
catcher() {
longjmp(buf);
return 1;
}
PyOS_CheckStack() {
static char *known_safe;
char *here;
if (we-are-in-a-thread())
go do different things;
if ( &here > known_safe )
return 1;
keep-old-SIGSEGV-handler;
if ( setjmp(buf) )
return 0;
signal(SIGSEGV, catcher);
prober();
restore-old-SIGSEGV-handler;
known_safe = &here - (STACK_INCREMENT - PYOS_STACK_MARGIN);
return 1;
}
--
Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++
Jack.Jansen@oratrix.com | ++++ if you agree copy these lines to your sig ++++
www.oratrix.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm
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