limit values ignored

It appears that OS X Lion is ignoring ulimit values. The same program on a Linux 2.6 32bit kernel stops based on the limits as expected

I've set the following via the bash shell.

ulimit -d 25000

ulimit -v 25000

ulimit -a

core file size (blocks, -c) 0

data seg size (kbytes, -d) 25000

file size (blocks, -f) unlimited

max locked memory (kbytes, -l) unlimited

max memory size (kbytes, -m) 25000

open files (-n) 256

pipe size (512 bytes, -p) 1

stack size (kbytes, -s) 8192

cpu time (seconds, -t) unlimited

max user processes (-u) 709

virtual memory (kbytes, -v) 25000

The following program still runs successfully allocating 1M times for 1K each time. Activity monitor indicates the process has allocated nearly 1 GB. Why?

#include <stdio.h>

#include <assert.h>

int main (int argc, char * argv[]) {

static char * p[1000000];

static int count = 0;

int i;

for (i=0; i < 1000000; i++) {

printf ("%d ", i);

p[count] = malloc (1024);

if (p[count] == NULL) break;

count++;

}

}