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 9 #ifndef MCL_ONFAULT 10 #define MCL_ONFAULT (MCL_FUTURE << 1) 11 #endif 12 13 static int test_limit(void) 14 { 15 int ret = 1; 16 struct rlimit lims; 17 void *map; 18 19 if (getrlimit(RLIMIT_MEMLOCK, &lims)) { 20 perror("getrlimit"); 21 return ret; 22 } 23 24 if (mlockall(MCL_ONFAULT | MCL_FUTURE)) { 25 perror("mlockall"); 26 return ret; 27 } 28 29 map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE, 30 MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0); 31 if (map != MAP_FAILED) 32 printf("mmap should have failed, but didn't\n"); 33 else { 34 ret = 0; 35 munmap(map, 2 * lims.rlim_max); 36 } 37 38 munlockall(); 39 return ret; 40 } 41 42 int main(int argc, char **argv) 43 { 44 int ret = 0; 45 46 ret += test_limit(); 47 return ret; 48 } 49
