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: mremap02
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 the virtual memory area previously
27 * mapped was not page aligned or invalid argument specified.
28 *
29 * Expected Result:
30 * mremap() should return -1 and set errno to EINVAL.
31 *
32 * Algorithm:
33 * Setup:
34 * Setup signal handling.
35 * Pause for SIGUSR1 if option specified.
36 *
37 * Test:
38 * Loop if the proper options are given.
39 * Execute system call
40 * Check return code, if system call failed (return=-1)
41 * if errno set == expected errno
42 * Issue sys call fails with expected return value and errno.
43 * Otherwise,
44 * Issue sys call fails with unexpected errno.
45 * Otherwise,
46 * Issue sys call returns unexpected value.
47 *
48 * Cleanup:
49 * Print errno log and/or timing stats if options given
50 *
51 * Usage: <for command-line>
52 * mremap02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
53 * where, -c n : Run n copies concurrently.
54 * -e : Turn on errno logging.
55 * -i n : Execute test n times.
56 * -I x : Execute test for x seconds.
57 * -p x : Pause for x seconds between iterations.
58 * -t : Turn on syscall timing.
59 *
60 * HISTORY
61 * 07/2001 Ported by Wayne Boyer
62 *
63 * 11/09/2001 Manoj Iyer (manjo@austin.ibm.com)
64 * Modified.
65 * - #include <linux/mman.h> should not be included as per man page for
66 * mremap, #include <sys/mman.h> alone should do the job. But inorder
67 * to include definition of MREMAP_MAYMOVE defined in bits/mman.h
68 * (included by sys/mman.h) __USE_GNU needs to be defined.
69 * There may be a more elegant way of doing this...
70 *
71 *
72 * RESTRICTIONS:
73 * None.
74 */
75 #include <errno.h>
76 #include <unistd.h>
77 #include <fcntl.h>
78 #define __USE_GNU
79 #include <sys/mman.h>
80 #undef __USE_GNU
81
82 #include "test.h"
83
84 char *TCID = "mremap02";
85 int TST_TOTAL = 1;
86 char *addr; /* addr of memory mapped region */
87 int memsize; /* memory mapped size */
88 int newsize; /* new size of virtual memory block */
89
90 void setup(); /* Main setup function of test */
91 void cleanup(); /* cleanup function for the test */
92
main(int ac,char ** av)93 int main(int ac, char **av)
94 {
95 int lc;
96
97 tst_parse_opts(ac, av, NULL, NULL);
98
99 setup();
100
101 for (lc = 0; TEST_LOOPING(lc); lc++) {
102
103 tst_count = 0;
104
105 /*
106 * Attempt to expand the existing mapped
107 * memory region (memsize) by newsize limits using
108 * mremap() should fail as old virtual address is not
109 * page aligned.
110 */
111 errno = 0;
112 addr = mremap(addr, memsize, newsize, MREMAP_MAYMOVE);
113 TEST_ERRNO = errno;
114
115 /* Check for the return value of mremap() */
116 if (addr != MAP_FAILED) {
117 tst_resm(TFAIL,
118 "mremap returned invalid value, expected: -1");
119
120 /* Unmap the mapped memory region */
121 if (munmap(addr, newsize) != 0) {
122 tst_brkm(TBROK, cleanup, "munmap fails to "
123 "unmap the expanded memory region, "
124 "error=%d", errno);
125 }
126 continue;
127 }
128
129 if (errno == EINVAL) {
130 tst_resm(TPASS, "mremap() Failed, 'invalid argument "
131 "specified' - errno %d", TEST_ERRNO);
132 } else {
133 tst_resm(TFAIL, "mremap() Failed, "
134 "'Unexpected errno %d", TEST_ERRNO);
135 }
136 }
137
138 cleanup();
139 tst_exit();
140
141 }
142
143 /*
144 * setup() - performs all ONE TIME setup for this test.
145 *
146 * Get system page size, Set the size of virtual memory area and the
147 * new size after resize, Set the virtual memory address such that it
148 * is not aligned.
149 */
setup(void)150 void setup(void)
151 {
152
153 tst_sig(FORK, DEF_HANDLER, cleanup);
154
155 TEST_PAUSE;
156
157 /* Get the system page size */
158 if ((memsize = getpagesize()) < 0) {
159 tst_brkm(TFAIL, NULL,
160 "getpagesize() fails to get system page size");
161 }
162
163 /* Get the New size of virtual memory block after resize */
164 newsize = (memsize * 2);
165
166 /* Set the old virtual memory address */
167 addr = (char *)(addr + (memsize - 1));
168 }
169
170 /*
171 * cleanup() - performs all ONE TIME cleanup for this test at
172 * completion or premature exit.
173 */
cleanup(void)174 void cleanup(void)
175 {
176
177 /* Exit the program */
178
179 }
180