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 * The mapping established by mmap( ) shall replace any previous 8 * mappings for those whole pages containing any part of the address 9 * space of the process starting at pa and continuing for len bytes. 10 * 11 * Test Step: 12 * 1. Set the size of the file to be mapped as (2 * _SC_PAGE_SIZE); 13 * 2. Map size = (_SC_PAGE_SIZE + 2) bytes into memory, 14 * setting the content as 'a'. The mapped address is pa. 15 * 2. Map size2 = (_SC_PAGE_SIZE + 1) bytes into memory, starting at the same 16 * address as the first mmap, i.e. pa, using MAP_FIXED flag. 17 * Setting the cotent as 'b' 18 * 3. Test whether byte *(pa + size) is 'b'. 19 */ 20 21 22 23#define _XOPEN_SOURCE 600 24#include <pthread.h> 25#include <stdio.h> 26#include <stdlib.h> 27#include <unistd.h> 28#include <sys/mman.h> 29#include <sys/types.h> 30#include <sys/stat.h> 31#include <fcntl.h> 32#include <string.h> 33#include <errno.h> 34#include "posixtest.h" 35 36#define TNAME "mmap/3-1.c" 37 38int main() 39{ 40 char tmpfname[256]; 41 char tmpfname2[256]; 42 char* data; 43 long total_size; 44 long page_size; 45 46 void *pa = NULL; 47 void *addr = NULL; 48 size_t size; 49 int prot = PROT_READ | PROT_WRITE; 50 int flag = MAP_SHARED; 51 int fd; 52 off_t off = 0; 53 54 void *pa2 = NULL; 55 void *addr2 = NULL; 56 size_t size2; 57 int prot2 = PROT_READ | PROT_WRITE; 58 int flag2 ; 59 int fd2; 60 off_t off2 = 0; 61 62 char *ch; 63 64#ifndef MAP_FIXED 65 printf("MAP_FIXED does not defined\n"); 66 exit(PTS_UNRESOLVED); 67#endif 68 69 page_size = sysconf(_SC_PAGE_SIZE); 70 size = page_size + 2; 71 size2 = page_size + 1; 72 73 /* Size of the file */ 74 total_size = 2 * page_size; 75 76 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_3_1_%ld", 77 (long)getpid()); 78 snprintf(tmpfname2, sizeof(tmpfname2), "/tmp/pts_mmap_3_1_2_%ld", 79 (long)getpid()); 80 data = (char *) malloc(total_size); 81 unlink(tmpfname); 82 unlink(tmpfname2); 83 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, 84 S_IRUSR | S_IWUSR); 85 fd2 = open(tmpfname2, O_CREAT | O_RDWR | O_EXCL, 86 S_IRUSR | S_IWUSR); 87 if (fd == -1 || fd2 == -1) 88 { 89 printf(TNAME " Error at open(): %s\n", 90 strerror(errno)); 91 exit(PTS_UNRESOLVED); 92 } 93 unlink(tmpfname); 94 unlink(tmpfname2); 95 memset(data, 'a', total_size); 96 if (write(fd, data, total_size) != total_size) 97 { 98 printf(TNAME "Error at write(), fd: %s\n", 99 strerror(errno)); 100 exit(PTS_UNRESOLVED); 101 } 102 memset(data, 'b', total_size); 103 if (write(fd2, data, total_size) != total_size) 104 { 105 printf(TNAME "Error at write(), fd1: %s\n", 106 strerror(errno)); 107 exit(PTS_UNRESOLVED); 108 } 109 free(data); 110 111 pa = mmap(addr, size, prot, flag, fd, off); 112 if (pa == MAP_FAILED) 113 { 114 printf ("Test Fail: " TNAME " Error at mmap: %s\n", 115 strerror(errno)); 116 exit(PTS_FAIL); 117 } 118 119 ch = pa + size; 120 if (*ch != 'a') 121 { 122 printf ("Test Fail: " TNAME 123 " The file did not mapped to memory\n"); 124 exit(PTS_FAIL); 125 } 126 127 /* Replace orginal mapping*/ 128 129 addr2 = pa; 130 flag2 = MAP_SHARED | MAP_FIXED; 131 pa2 = mmap(addr2, size2, prot2, flag2, fd2, off2); 132 if (pa2 == MAP_FAILED) 133 { 134 printf ("Test Fail: " TNAME " Error at 2nd mmap: %s\n", 135 strerror(errno)); 136 exit(PTS_FAIL); 137 } 138 139 if (pa2 != pa) 140 { 141 printf ("Test Fail: " TNAME " Error at mmap: " 142 "Second mmap does not replace the first mmap\n"); 143 exit(PTS_FAIL); 144 } 145 146 ch = pa2 + size; 147 if (*ch != 'b') 148 { 149 printf ("Test Fail: " TNAME 150 " The original mapped page has not been replaced\n"); 151 exit(PTS_FAIL); 152 } 153 154 close(fd); 155 close(fd2); 156 munmap(pa, size); 157 munmap(pa2, size2); 158 printf ("Test Pass\n"); 159 return PTS_PASS; 160} 161