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 (at) 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 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 */ 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 */ 174 void cleanup(void) 175 { 176 177 /* Exit the program */ 178 179 } 180
