// 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; }