Hi, 

I recently found that, at least on the 386, alloca() doesn't return
NULL when the stack limit is reached. Is it a bug or a feature ?

If it's a feature, the alloca() man page is false.

The follwing (ugly) program seg faults to demonstrate it:


#include <stdio.h>
#include <stdlib.h>

main()
{
    char *p;
    int i = 0;
    
    while (1) {
	p = alloca(1024);
	if (p == NULL) {
	    printf("stop: i = %d\n", i);
	    exit(0);
	}
	i++;
	printf("%d\n", i);
	*p = 0;
    }
}


					Matthieu