1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Test Name: mremap03
22 *
23 * Test Description:
24 * Verify that,
25 * mremap() fails when used to expand the existing virtual memory mapped
26 * region to the requested size, if there already exists mappings that
27 * cover the whole address space requsted or the old address specified was
28 * not mapped.
29 *
30 * Expected Result:
31 * mremap() should return -1 and set errno to EFAULT.
32 *
33 * Algorithm:
34 * Setup:
35 * Setup signal handling.
36 * Pause for SIGUSR1 if option specified.
37 *
38 * Test:
39 * Loop if the proper options are given.
40 * Execute system call
41 * Check return code, if system call failed (return=-1)
42 * if errno set == expected errno
43 * Issue sys call fails with expected return value and errno.
44 * Otherwise,
45 * Issue sys call fails with unexpected errno.
46 * Otherwise,
47 * Issue sys call returns unexpected value.
48 *
49 * Cleanup:
50 * Print errno log and/or timing stats if options given
51 *
52 * Usage: <for command-line>
53 * mremap03 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -e : Turn on errno logging.
56 * -i n : Execute test n times.
57 * -I x : Execute test for x seconds.
58 * -p x : Pause for x seconds between iterations.
59 * -t : Turn on syscall timing.
60 *
61 * HISTORY
62 * 07/2001 Ported by Wayne Boyer
63 *
64 * 11/09/2001 Manoj Iyer (manjo@austin.ibm.com)
65 * Modified.
66 * - #include <linux/mman.h> should not be included as per man page for
67 * mremap, #include <sys/mman.h> alone should do the job. But inorder
68 * to include definition of MREMAP_MAYMOVE defined in bits/mman.h
69 * (included by sys/mman.h) __USE_GNU needs to be defined.
70 * There may be a more elegant way of doing this...
71 *
72 *
73 * RESTRICTIONS:
74 * None.
75 */
76 #define _GNU_SOURCE
77 #include <errno.h>
78 #include <unistd.h>
79 #include <fcntl.h>
80 #include <sys/mman.h>
81
82 #include "test.h"
83
84 char *TCID = "mremap03";
85 int TST_TOTAL = 1;
86 static char *bad_addr;
87 static char *addr; /* addr of memory mapped region */
88 int memsize; /* memory mapped size */
89 int newsize; /* new size of virtual memory block */
90
91 void setup(); /* Main setup function of test */
92 void cleanup(); /* cleanup function for the test */
93
main(int ac,char ** av)94 int main(int ac, char **av)
95 {
96 int lc;
97
98 tst_parse_opts(ac, av, NULL, NULL);
99
100 setup();
101
102 for (lc = 0; TEST_LOOPING(lc); lc++) {
103
104 tst_count = 0;
105
106 /*
107 * Attempt to expand the existing mapped
108 * memory region (memsize) by newsize limits
109 * using mremap() should fail as specified old
110 * virtual address was not mapped.
111 */
112 errno = 0;
113 addr = mremap(bad_addr, memsize, newsize, MREMAP_MAYMOVE);
114 TEST_ERRNO = errno;
115
116 /* Check for the return value of mremap() */
117 if (addr != MAP_FAILED) {
118 tst_resm(TFAIL,
119 "mremap returned invalid value, expected: -1");
120
121 /* Unmap the mapped memory region */
122 if (munmap(addr, newsize) != 0) {
123 tst_brkm(TFAIL, cleanup, "munmap fails to "
124 "unmap the expanded memory region, "
125 " error=%d", errno);
126 }
127 continue;
128 }
129
130 /* Check for the expected errno */
131 if (errno == EFAULT) {
132 tst_resm(TPASS, "mremap() Fails, 'old region not "
133 "mapped', errno %d", TEST_ERRNO);
134 } else {
135 tst_resm(TFAIL, "mremap() Fails, "
136 "'Unexpected errno %d", TEST_ERRNO);
137 }
138 }
139
140 cleanup();
141 tst_exit();
142
143 }
144
145 /*
146 * setup() - performs all ONE TIME setup for this test.
147 *
148 * Get system page size.
149 * Set the old address point some high address which is not mapped.
150 */
setup(void)151 void setup(void)
152 {
153 int page_sz; /* system page size */
154
155 tst_sig(FORK, DEF_HANDLER, cleanup);
156
157 TEST_PAUSE;
158
159 /* Get the system page size */
160 if ((page_sz = getpagesize()) < 0) {
161 tst_brkm(TFAIL, NULL,
162 "getpagesize() fails to get system page size");
163 }
164
165 /* Get the size of virtual memory area to be mapped */
166 memsize = (1000 * page_sz);
167
168 /* Get the New size of virtual memory block after resize */
169 newsize = (memsize * 2);
170
171 /*
172 * Set the old virtual address point to some address
173 * which is not mapped.
174 */
175 bad_addr = tst_get_bad_addr(cleanup);
176 }
177
178 /*
179 * cleanup() - performs all ONE TIME cleanup for this test at
180 * completion or premature exit.
181 */
cleanup(void)182 void cleanup(void)
183 {
184
185 /* Exit the program */
186
187 }
188