/* This program tries to allocate a tebibyte of memory
   and writes a byte to each page. If this does not work,
   try executing the following command before on Linux:

   sh -c 'echo 1 >/proc/sys/vm/overcommit_memory'

*/

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

int main() {
	char *x = malloc(1024L*1024L*1024L*1024L);
	size_t i = 0;

	if (x == NULL) {
		fprintf(stderr,"Cannot allocate that much memory!\n");
		return EXIT_FAILURE;
	}

	for(;;i+=4096) {
		x[i] = 0;
		if (i%(256*1024*1024)==0) sleep(1);
	}

	return EXIT_SUCCESS;
}