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 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <unistd.h> 22 #include <sys/mman.h> 23 #include <sys/types.h> 24 #include <sys/stat.h> 25 #include <sys/wait.h> 26 #include <fcntl.h> 27 #include <string.h> 28 #include <errno.h> 29 #include "posixtest.h" 30 31 #define LOOP_NUM 100000 32 33 int main(void) 34 { 35 int rc; 36 unsigned long cnt; 37 38 char tmpfname[256]; 39 long total_size; 40 41 void *pa; 42 size_t size; 43 int fd; 44 45 total_size = 1024; 46 size = total_size; 47 48 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_10_1_%d", getpid()); 49 unlink(tmpfname); 50 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); 51 if (fd == -1) { 52 printf("Error at open(): %s\n", strerror(errno)); 53 return PTS_UNRESOLVED; 54 } 55 unlink(tmpfname); 56 if (ftruncate(fd, total_size) == -1) { 57 printf("Error at ftruncate(): %s\n", strerror(errno)); 58 return PTS_UNRESOLVED; 59 } 60 61 for (cnt = 0; cnt < LOOP_NUM; cnt++) { 62 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 63 0); 64 if (pa == MAP_FAILED) { 65 printf("Test FAILED: Error at mmap: %s\n", 66 strerror(errno)); 67 return PTS_FAIL; 68 } 69 70 if (pa == NULL) { 71 printf("Test FAILED:" 72 " mmap() map the file to 0 address " 73 "without setting MAP_FIXED\n"); 74 return PTS_FAIL; 75 } 76 rc = munmap(pa, size); 77 if (rc != 0) { 78 printf("Error at mnumap(): %s\n", strerror(errno)); 79 return PTS_UNRESOLVED; 80 } 81 } 82 83 close(fd); 84 printf("Test PASSED\n"); 85 return PTS_PASS; 86 } 87
