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 8 * mappings in the specified address range, then munmap() has no effect. 9 * 10 */ 11 12 #define _XOPEN_SOURCE 600 13 14 #include <pthread.h> 15 #include <stdio.h> 16 #include <stdlib.h> 17 #include <unistd.h> 18 #include <sys/mman.h> 19 #include <sys/types.h> 20 #include <sys/stat.h> 21 #include <sys/wait.h> 22 #include <fcntl.h> 23 #include <string.h> 24 #include <errno.h> 25 #include "posixtest.h" 26 27 #define TNAME "munmap/2-1.c" 28 main(void)29int main(void) 30 { 31 int rc; 32 33 int page_size; 34 void *buffer = NULL, *new_addr = NULL; 35 36 page_size = sysconf(_SC_PAGE_SIZE); 37 buffer = malloc(page_size * 2); 38 if (buffer == NULL) { 39 printf("Error at malloc\n"); 40 exit(PTS_UNRESOLVED); 41 } 42 43 /* Make new_addr is a multiple of page_size, while 44 * [new_addr, new_addr + page_size] is a valid memory range 45 */ 46 new_addr = buffer + (page_size - (unsigned long)buffer % page_size); 47 48 rc = munmap(new_addr, page_size); 49 if (rc == -1) { 50 printf("Test FAILED " TNAME " Error at munmap(): %s\n", 51 strerror(errno)); 52 free(buffer); 53 exit(PTS_FAIL); 54 } 55 56 free(buffer); 57 printf("Test PASSED\n"); 58 return PTS_PASS; 59 } 60