1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Copyright (c) 2012, Cyril Hrubis <chrubis (at) suse.cz> 4 * 5 * This file is licensed under the GPL license. For the full content 6 * of this license, see the COPYING file at the top level of this 7 * source tree. 8 * 9 * When the implementation selects a 10 * value for pa, it never places a mapping at address 0. 11 * 12 * Test steps: 13 * This is not a good test. Cannot make sure (pa == 0) never happens. 14 * Repeat LOOP_NUM times mmap() and mnumap(), 15 * make sure pa will not equal 0. 16 */ 17 18 #define _XOPEN_SOURCE 600 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <unistd.h> 23 #include <sys/mman.h> 24 #include <sys/types.h> 25 #include <sys/stat.h> 26 #include <sys/wait.h> 27 #include <fcntl.h> 28 #include <string.h> 29 #include <errno.h> 30 #include "posixtest.h" 31 32 #define LOOP_NUM 100000 33 34 int main(void) 35 { 36 int rc; 37 unsigned long cnt; 38 39 char tmpfname[256]; 40 long total_size; 41 42 void *pa; 43 size_t size; 44 int fd; 45 46 total_size = 1024; 47 size = total_size; 48 49 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_10_1_%d", getpid()); 50 unlink(tmpfname); 51 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); 52 if (fd == -1) { 53 printf("Error at open(): %s\n", strerror(errno)); 54 return PTS_UNRESOLVED; 55 } 56 unlink(tmpfname); 57 if (ftruncate(fd, total_size) == -1) { 58 printf("Error at ftruncate(): %s\n", strerror(errno)); 59 return PTS_UNRESOLVED; 60 } 61 62 for (cnt = 0; cnt < LOOP_NUM; cnt++) { 63 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 64 0); 65 if (pa == MAP_FAILED) { 66 printf("Test FAILED: Error at mmap: %s\n", 67 strerror(errno)); 68 return PTS_FAIL; 69 } 70 71 if (pa == NULL) { 72 printf("Test FAILED:" 73 " mmap() map the file to 0 address " 74 "without setting MAP_FIXED\n"); 75 return PTS_FAIL; 76 } 77 rc = munmap(pa, size); 78 if (rc != 0) { 79 printf("Error at mnumap(): %s\n", strerror(errno)); 80 return PTS_UNRESOLVED; 81 } 82 } 83 84 close(fd); 85 printf("Test PASSED\n"); 86 return PTS_PASS; 87 } 88
