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 mmap( ) function shall fail if: 8 * [ENXIO] Addresses in the range [off,off+len) are invalid 9 * for the object specified by fildes. 10 * 11 * Test Step: 12 * 1. mmap a shared memory object into memory; 13 * 2. (off + len) will beyond the the shared memory object; 14 * 15 * FIXME: Not sure what does "invalid" mean here 16 * 17 * This mmap might trigger SIGBUS on some system. 18 */ 19 20#define _XOPEN_SOURCE 600 21#include <pthread.h> 22#include <stdio.h> 23#include <stdlib.h> 24#include <unistd.h> 25#include <sys/mman.h> 26#include <sys/types.h> 27#include <sys/stat.h> 28#include <fcntl.h> 29#include <string.h> 30#include <errno.h> 31#include <signal.h> 32#include "posixtest.h" 33 34#define TNAME "mmap/28-1.c" 35 36void sigbus_handler (int signum) 37{ 38 printf("Test UNRESOLVED: Triger SIGBUS\n"); 39 exit(PTS_UNRESOLVED); 40} 41 42int main() 43{ 44 char tmpfname[256]; 45 int shm_fd; 46 long shm_size; 47 48 void *pa = NULL; 49 void *addr = NULL; 50 size_t len = 0; 51 int prot = PROT_READ | PROT_WRITE; 52 int flag; 53 int fd; 54 off_t off = 0; 55 56 long page_size = sysconf(_SC_PAGE_SIZE); 57 shm_size = 2 * page_size; 58 59 if (signal(SIGBUS, sigbus_handler) == SIG_ERR) 60 { 61 printf(TNAME " Error at signal(): %s\n", strerror(errno)); 62 return PTS_UNRESOLVED; 63 } 64 65 snprintf(tmpfname, sizeof(tmpfname), "pts_mmap_28_1_%ld", 66 (long)getpid()); 67 /* Create shared object */ 68 shm_unlink(tmpfname); 69 shm_fd = shm_open(tmpfname, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR); 70 if(shm_fd == -1) 71 { 72 printf(TNAME " Error at shm_open(): %s\n", strerror(errno)); 73 return PTS_UNRESOLVED; 74 } 75 shm_unlink(tmpfname); 76 if(ftruncate(shm_fd, shm_size) == -1) { 77 printf(TNAME " Error at ftruncate(): %s\n", strerror(errno)); 78 return PTS_UNRESOLVED; 79 } 80 81 /* (off + len) will go outside the object */ 82 fd = shm_fd; 83 len = 2 * shm_size; 84 flag = MAP_SHARED; 85 off = page_size; 86 pa = mmap (addr, len, prot, flag, fd, off); 87 if (pa != MAP_FAILED ) 88 { 89 printf ("Test Fail: " TNAME " Got no error at mmap()\n"); 90 close(fd); 91 munmap(pa, len); 92 exit(PTS_FAIL); 93 } 94 else if (errno != ENXIO) 95 { 96 printf ("Test Fail: " TNAME " Did not get ENXIO," 97 " get other error: %s\n", strerror(errno)); 98 exit(PTS_FAIL); 99 } 100 101 printf ("Test Pass\n"); 102 return PTS_PASS; 103} 104