1 /*
2 * Copyright (c) 2002, Intel Corporation. All rights reserved.
3 * Copyright (c) 2012, Cyril Hrubis <chrubis@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
main(void)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