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 (at) 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 #include <errno.h> 77 #include <unistd.h> 78 #include <fcntl.h> 79 #define __USE_GNU 80 #include <sys/mman.h> 81 #undef __USE_GNU 82 83 #include "test.h" 84 85 char *TCID = "mremap03"; 86 int TST_TOTAL = 1; 87 static char *bad_addr; 88 static char *addr; /* addr of memory mapped region */ 89 int memsize; /* memory mapped size */ 90 int newsize; /* new size of virtual memory block */ 91 92 void setup(); /* Main setup function of test */ 93 void cleanup(); /* cleanup function for the test */ 94 95 int main(int ac, char **av) 96 { 97 int lc; 98 99 tst_parse_opts(ac, av, NULL, NULL); 100 101 setup(); 102 103 for (lc = 0; TEST_LOOPING(lc); lc++) { 104 105 tst_count = 0; 106 107 /* 108 * Attempt to expand the existing mapped 109 * memory region (memsize) by newsize limits 110 * using mremap() should fail as specified old 111 * virtual address was not mapped. 112 */ 113 errno = 0; 114 addr = mremap(bad_addr, memsize, newsize, MREMAP_MAYMOVE); 115 TEST_ERRNO = errno; 116 117 /* Check for the return value of mremap() */ 118 if (addr != MAP_FAILED) { 119 tst_resm(TFAIL, 120 "mremap returned invalid value, expected: -1"); 121 122 /* Unmap the mapped memory region */ 123 if (munmap(addr, newsize) != 0) { 124 tst_brkm(TFAIL, cleanup, "munmap fails to " 125 "unmap the expanded memory region, " 126 " error=%d", errno); 127 } 128 continue; 129 } 130 131 /* Check for the expected errno */ 132 if (errno == EFAULT) { 133 tst_resm(TPASS, "mremap() Fails, 'old region not " 134 "mapped', errno %d", TEST_ERRNO); 135 } else { 136 tst_resm(TFAIL, "mremap() Fails, " 137 "'Unexpected errno %d", TEST_ERRNO); 138 } 139 } 140 141 cleanup(); 142 tst_exit(); 143 144 } 145 146 /* 147 * setup() - performs all ONE TIME setup for this test. 148 * 149 * Get system page size. 150 * Set the old address point some high address which is not mapped. 151 */ 152 void setup(void) 153 { 154 int page_sz; /* system page size */ 155 156 tst_sig(FORK, DEF_HANDLER, cleanup); 157 158 TEST_PAUSE; 159 160 /* Get the system page size */ 161 if ((page_sz = getpagesize()) < 0) { 162 tst_brkm(TFAIL, NULL, 163 "getpagesize() fails to get system page size"); 164 } 165 166 /* Get the size of virtual memory area to be mapped */ 167 memsize = (1000 * page_sz); 168 169 /* Get the New size of virtual memory block after resize */ 170 newsize = (memsize * 2); 171 172 /* 173 * Set the old virtual address point to some address 174 * which is not mapped. 175 */ 176 bad_addr = tst_get_bad_addr(cleanup); 177 } 178 179 /* 180 * cleanup() - performs all ONE TIME cleanup for this test at 181 * completion or premature exit. 182 */ 183 void cleanup(void) 184 { 185 186 /* Exit the program */ 187 188 } 189
