tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include <sys/mman.h>
3#include <stdio.h>
4#include <unistd.h>
5#include <string.h>
6#include <sys/time.h>
7#include <sys/resource.h>
8
9static int test_limit(void)
10{
11 int ret = 1;
12 struct rlimit lims;
13 void *map;
14
15 if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
16 perror("getrlimit");
17 return ret;
18 }
19
20 if (mlockall(MCL_ONFAULT | MCL_FUTURE)) {
21 perror("mlockall");
22 return ret;
23 }
24
25 map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
26 MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
27 if (map != MAP_FAILED)
28 printf("mmap should have failed, but didn't\n");
29 else {
30 ret = 0;
31 munmap(map, 2 * lims.rlim_max);
32 }
33
34 munlockall();
35 return ret;
36}
37
38int main(int argc, char **argv)
39{
40 int ret = 0;
41
42 ret += test_limit();
43 return ret;
44}