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: msync02
22 *
23 * Test Description:
24 * Verify that msync() succeeds when the region to synchronize is mapped
25 * shared and the flags argument is MS_INVALIDATE.
26 *
27 * Expected Result:
28 * msync() should succeed with a return value of 0, and successfully
29 * synchronize the memory region.
30 *
31 * Algorithm:
32 * Setup:
33 * Setup signal handling.
34 * Create temporary directory.
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 * Log the errno and Issue a FAIL message.
42 * Otherwise,
43 * Verify the Functionality of system call
44 * if successful,
45 * Issue Functionality-Pass message.
46 * Otherwise,
47 * Issue Functionality-Fail message.
48 * Cleanup:
49 * Print errno log and/or timing stats if options given
50 * Delete the temporary directory created.
51 *
52 * Usage: <for command-line>
53 * msync02 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -f : Turn off functionality Testing.
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 * RESTRICTIONS:
65 * None.
66 */
67 #include <errno.h>
68 #include <unistd.h>
69 #include <fcntl.h>
70 #include <sys/mman.h>
71
72 #include "test.h"
73
74 #define TEMPFILE "msync_file"
75 #define BUF_SIZE 256
76
77 char *TCID = "msync02";
78 int TST_TOTAL = 1;
79
80 char *addr; /* addr of memory mapped region */
81 size_t page_sz; /* system page size */
82 int fildes; /* file descriptor for tempfile */
83 char write_buf[10] = "Testing"; /* buffer to hold data to be written */
84
85 void setup(); /* Main setup function of test */
86 void cleanup(); /* cleanup function for the test */
87
main(int ac,char ** av)88 int main(int ac, char **av)
89 {
90 tst_parse_opts(ac, av, NULL, NULL);
91
92 setup();
93
94 TEST(msync(addr, page_sz, MS_INVALIDATE));
95
96 if (TEST_RETURN == -1)
97 tst_resm(TFAIL | TTERRNO, "msync failed");
98 else if (memcmp(addr + 100, write_buf, strlen(write_buf)) != 0)
99 tst_resm(TFAIL, "memory region contains invalid data");
100 else
101 tst_resm(TPASS, "Functionality of msync successful");
102
103 cleanup();
104 tst_exit();
105 }
106
setup(void)107 void setup(void)
108 {
109 int c_total = 0, nwrite = 0; /* no. of bytes to be written */
110 char tst_buf[BUF_SIZE];
111
112 tst_sig(NOFORK, DEF_HANDLER, cleanup);
113
114 TEST_PAUSE;
115
116 if ((page_sz = getpagesize()) == -1)
117 tst_brkm(TBROK | TERRNO, NULL, "getpagesize failed");
118
119 tst_tmpdir();
120
121 if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0)
122 tst_brkm(TBROK | TERRNO, cleanup, "open failed");
123
124 /* Write one page size of char data into temporary file */
125 while (c_total < page_sz) {
126 if ((nwrite = write(fildes, tst_buf, sizeof(tst_buf))) <= 0)
127 tst_brkm(TBROK | TERRNO, cleanup, "write failed");
128 else
129 c_total += nwrite;
130 }
131
132 addr = mmap(0, page_sz, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED,
133 fildes, 0);
134
135 if (addr == MAP_FAILED)
136 tst_brkm(TBROK | TERRNO, cleanup, "mmap failed");
137
138 /* Again, Seek to the specified byte offset (100) position */
139 if (lseek(fildes, 100, SEEK_SET) != 100)
140 tst_brkm(TBROK | TERRNO, cleanup, "lseek failed");
141
142 /* Write the string in write_buf at the 100 byte offset */
143 if (write(fildes, write_buf, strlen(write_buf)) != strlen(write_buf))
144 tst_brkm(TBROK | TERRNO, cleanup, "write failed");
145 }
146
cleanup(void)147 void cleanup(void)
148 {
149 if (munmap(addr, page_sz) == -1)
150 tst_resm(TBROK | TERRNO, "munmap failed");
151
152 /* Close the temporary file */
153 if (close(fildes) == -1)
154 tst_resm(TWARN | TERRNO, "close failed");
155
156 tst_rmdir();
157 }
158