1#include <sys/mman.h>
2#include <stdio.h>
3#include <unistd.h>
4#include <string.h>
5#include <sys/time.h>
6#include <sys/resource.h>
7
8#ifndef MCL_ONFAULT
9#define MCL_ONFAULT (MCL_FUTURE << 1)
10#endif
11
12static int test_limit(void)
13{
14	int ret = 1;
15	struct rlimit lims;
16	void *map;
17
18	if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
19		perror("getrlimit");
20		return ret;
21	}
22
23	if (mlockall(MCL_CURRENT | MCL_ONFAULT | MCL_FUTURE)) {
24		perror("mlockall");
25		return ret;
26	}
27
28	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
29		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, 0, 0);
30	if (map != MAP_FAILED)
31		printf("mmap should have failed, but didn't\n");
32	else {
33		ret = 0;
34		munmap(map, 2 * lims.rlim_max);
35	}
36
37	munlockall();
38	return ret;
39}
40
41int main(int argc, char **argv)
42{
43	int ret = 0;
44
45	ret += test_limit();
46	return ret;
47}
48