162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <sys/mman.h> 362306a36Sopenharmony_ci#include <stdio.h> 462306a36Sopenharmony_ci#include <unistd.h> 562306a36Sopenharmony_ci#include <string.h> 662306a36Sopenharmony_ci#include <sys/time.h> 762306a36Sopenharmony_ci#include <sys/resource.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_cistatic int test_limit(void) 1062306a36Sopenharmony_ci{ 1162306a36Sopenharmony_ci int ret = 1; 1262306a36Sopenharmony_ci struct rlimit lims; 1362306a36Sopenharmony_ci void *map; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci if (getrlimit(RLIMIT_MEMLOCK, &lims)) { 1662306a36Sopenharmony_ci perror("getrlimit"); 1762306a36Sopenharmony_ci return ret; 1862306a36Sopenharmony_ci } 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci if (mlockall(MCL_ONFAULT | MCL_FUTURE)) { 2162306a36Sopenharmony_ci perror("mlockall"); 2262306a36Sopenharmony_ci return ret; 2362306a36Sopenharmony_ci } 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE, 2662306a36Sopenharmony_ci MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0); 2762306a36Sopenharmony_ci if (map != MAP_FAILED) 2862306a36Sopenharmony_ci printf("mmap should have failed, but didn't\n"); 2962306a36Sopenharmony_ci else { 3062306a36Sopenharmony_ci ret = 0; 3162306a36Sopenharmony_ci munmap(map, 2 * lims.rlim_max); 3262306a36Sopenharmony_ci } 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci munlockall(); 3562306a36Sopenharmony_ci return ret; 3662306a36Sopenharmony_ci} 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ciint main(int argc, char **argv) 3962306a36Sopenharmony_ci{ 4062306a36Sopenharmony_ci int ret = 0; 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci ret += test_limit(); 4362306a36Sopenharmony_ci return ret; 4462306a36Sopenharmony_ci} 45