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On MacOSX StackSpace() may lie because it doesn't know about the stack rlimit. For now we set a hard limit of 256K (default rlimit is 512K).

This commit is contained in:
Jack Jansen 2001-02-02 22:40:28 +00:00
parent f8cdb5c56f
commit 340eb88fa8
1 changed files with 19 additions and 2 deletions
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21
Mac/Python/macglue.c
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@ -100,6 +100,16 @@ extern pascal unsigned char *PLstrrchr(unsigned char *, unsigned char);
#endif
#endif
#if TARGET_API_MAC_CARBON
/*
** On MacOSX StackSpace() lies: it gives the distance from heap end to stack pointer,
** but the stack cannot grow that far due to rlimit values. We cannot get at this value
** from Carbon, so we set a maximum to the stack here that is based on the default
** stack limit of 512K.
*/
#define MAXIMUM_STACK_SIZE (256*1024)
#endif
/*
** We have to be careful, since we can't handle
** things like updates (and they'll keep coming back if we don't
@ -429,8 +439,15 @@ PyOS_CheckStack()
static char *sentinel = 0;
static PyThreadState *thread_for_sentinel = 0;
if ( sentinel == 0 ) {
sentinel = &here - StackSpace() + MINIMUM_STACK_SIZE;
if ( sentinel == 0 ) {
unsigned long stackspace = StackSpace();
#ifdef MAXIMUM_STACK_SIZE
/* See the comment at the definition */
if ( stackspace > MAXIMUM_STACK_SIZE )
stackspace = MAXIMUM_STACK_SIZE;
#endif
sentinel = &here - stackspace + MINIMUM_STACK_SIZE;
}
if ( thread_for_sentinel == 0 ) {
thread_for_sentinel = PyThreadState_Get();