49 lines
842 B
C
Executable file
49 lines
842 B
C
Executable file
// SPDX-License-Identifier: GPL-2.0
|
|
#include <sys/mman.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
|
|
#ifndef MCL_ONFAULT
|
|
#define MCL_ONFAULT (MCL_FUTURE << 1)
|
|
#endif
|
|
|
|
static int test_limit(void)
|
|
{
|
|
int ret = 1;
|
|
struct rlimit lims;
|
|
void *map;
|
|
|
|
if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
|
|
perror("getrlimit");
|
|
return ret;
|
|
}
|
|
|
|
if (mlockall(MCL_ONFAULT | MCL_FUTURE)) {
|
|
perror("mlockall");
|
|
return ret;
|
|
}
|
|
|
|
map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
|
|
if (map != MAP_FAILED)
|
|
printf("mmap should have failed, but didn't\n");
|
|
else {
|
|
ret = 0;
|
|
munmap(map, 2 * lims.rlim_max);
|
|
}
|
|
|
|
munlockall();
|
|
return ret;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret += test_limit();
|
|
return ret;
|
|
}
|