1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * This file is licensed under the GPL license. For the full content 4 * of this license, see the COPYING file at the top level of this 5 * source tree. 6 * 7 * If there are no mappings in the specified address range, then munmap() has 8 * no effect. To get a valid address range which is safe to call munmap() on 9 * we first map some arbitrary memory allowing the OS to select the address 10 * then unmap it. We then call munmap() on the same address again to perform 11 * the test. 12 * 13 */ 14 15 #include <pthread.h> 16 #include <stdio.h> 17 #include <stdlib.h> 18 #include <unistd.h> 19 #include <sys/mman.h> 20 #include <sys/types.h> 21 #include <sys/stat.h> 22 #include <sys/wait.h> 23 #include <fcntl.h> 24 #include <string.h> 25 #include <errno.h> 26 #include "posixtest.h" 27 28 #define TNAME "munmap/2-1.c" 29 30 int main(void) 31 { 32 int rc, fd, map_size; 33 void *map_addr; 34 35 map_size = sysconf(_SC_PAGESIZE); 36 fd = open("/dev/zero", O_RDWR); 37 if (fd == -1) { 38 printf("Failed to open /dev/zero: %s (%d)\n", 39 strerror(errno), 40 errno); 41 return PTS_UNRESOLVED; 42 } 43 44 map_addr = mmap(NULL, map_size, PROT_NONE, MAP_PRIVATE, fd, 0); 45 if (map_addr == MAP_FAILED) { 46 printf("Failed to map memory: %s (%d)\n", 47 strerror(errno), 48 errno); 49 close(fd); 50 return PTS_UNRESOLVED; 51 } 52 53 close(fd); 54 55 rc = munmap(map_addr, map_size); 56 if (rc != 0) { 57 printf("Failed to unmap memory: %s (%d)\n", 58 strerror(errno), 59 errno); 60 close(fd); 61 return PTS_UNRESOLVED; 62 } 63 64 rc = munmap(map_addr, map_size); 65 if (rc != 0) { 66 printf("Test FAILED " TNAME " Error at munmap(): %s (%d)\n", 67 strerror(errno), 68 errno); 69 return PTS_FAIL; 70 } 71 72 printf("Test PASSED\n"); 73 return PTS_PASS; 74 } 75
