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: sigalstack02 22 * 23 * Test Description: 24 * Verify that, 25 * 1. sigaltstack() fails and sets errno to EINVAL when "ss_flags" field 26 * pointed to by 'ss' contains invalid flags. 27 * 2. sigaltstack() fails and sets errno to ENOMEM when the size of alternate 28 * stack area is less than MINSIGSTKSZ. 29 * 30 * Expected Result: 31 * sigaltstack() should fail with return value -1 and set expected errno. 32 * 33 * Algorithm: 34 * Setup: 35 * Setup signal handling. 36 * Create temporary directory. 37 * Pause for SIGUSR1 if option specified. 38 * 39 * Test: 40 * Loop if the proper options are given. 41 * Execute system call 42 * Check return code, if system call failed (return=-1) 43 * if errno set == expected errno 44 * Issue sys call fails with expected return value and errno. 45 * Otherwise, 46 * Issue sys call fails with unexpected errno. 47 * Otherwise, 48 * Issue sys call returns unexpected value. 49 * 50 * Cleanup: 51 * Print errno log and/or timing stats if options given 52 * Delete the temporary directory(s)/file(s) created. 53 * 54 * Usage: <for command-line> 55 * sigaltstack02 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t] 56 * where, -c n : Run n copies concurrently. 57 * -e : Turn on errno logging. 58 * -f : Turn off functionality Testing. 59 * -i n : Execute test n times. 60 * -I x : Execute test for x seconds. 61 * -P x : Pause for x seconds between iterations. 62 * -t : Turn on syscall timing. 63 * 64 * History 65 * 07/2001 John George 66 * -Ported 67 * 68 * Restrictions: 69 * This test should be executed by super-user (root) only. 70 */ 71 72 #include <stdio.h> 73 #include <sys/types.h> 74 #include <unistd.h> 75 #include <signal.h> 76 #include <string.h> 77 #include <ucontext.h> 78 #include <errno.h> 79 80 #include "test.h" 81 82 #define INVAL_FLAGS 9999 83 84 char *TCID = "sigaltstack02"; 85 int TST_TOTAL = 2; 86 87 stack_t sigstk; /* signal stack storing struct. */ 88 89 void setup(void); /* Main setup function of test */ 90 void cleanup(void); /* cleanup function for the test */ 91 92 struct test_case_t { /* test case struct. to hold diff. test.conds */ 93 int flag; 94 int size; 95 char *desc; 96 int exp_errno; 97 } Test_cases[] = { 98 { 99 INVAL_FLAGS, SIGSTKSZ, "Invalid Flag value", EINVAL}, 100 /* use value low enough for all kernel versions 101 * avoid using MINSIGSTKSZ defined by glibc as it could be different 102 * from the one in kernel ABI 103 */ 104 { 105 0, (2048 - 1), "alternate stack is < MINSIGSTKSZ", ENOMEM}, 106 { 107 0, 0, NULL, 0} 108 }; 109 110 int main(int ac, char **av) 111 { 112 int lc; 113 char *test_desc; /* test specific error message */ 114 int ind; /* counter to test different test conditions */ 115 116 tst_parse_opts(ac, av, NULL, NULL); 117 118 setup(); 119 120 for (lc = 0; TEST_LOOPING(lc); lc++) { 121 122 tst_count = 0; 123 124 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 125 sigstk.ss_size = Test_cases[ind].size; 126 sigstk.ss_flags = Test_cases[ind].flag; 127 test_desc = Test_cases[ind].desc; 128 129 /* Verify sigaltstack() fails and sets errno */ 130 TEST(sigaltstack(&sigstk, NULL)); 131 132 /* Check return code from sigaltstack() */ 133 if (TEST_RETURN == -1) { 134 if (TEST_ERRNO == 135 Test_cases[ind].exp_errno) { 136 tst_resm(TPASS, "stgaltstack() " 137 "fails, %s, errno:%d", 138 test_desc, TEST_ERRNO); 139 } else { 140 tst_resm(TFAIL, "sigaltstack() " 141 "fails, %s, errno:%d, " 142 "expected errno:%d", 143 test_desc, TEST_ERRNO, 144 Test_cases 145 [ind].exp_errno); 146 } 147 } else { 148 tst_resm(TFAIL, "sigaltstack() returned %ld, " 149 "expected -1, errno:%d", TEST_RETURN, 150 Test_cases[ind].exp_errno); 151 } 152 } 153 tst_count++; /* incr. TEST_LOOP counter */ 154 } 155 156 cleanup(); 157 tst_exit(); 158 159 } 160 161 /* 162 * void 163 * setup() - performs all ONE TIME setup for this test. 164 * Allocate memory for the alternative stack. 165 */ 166 void setup(void) 167 { 168 169 tst_sig(FORK, DEF_HANDLER, cleanup); 170 171 TEST_PAUSE; 172 173 /* Allocate memory for the alternate stack */ 174 if ((sigstk.ss_sp = malloc(SIGSTKSZ)) == NULL) { 175 tst_brkm(TFAIL, cleanup, 176 "could not allocate memory for the alternate stack"); 177 } 178 } 179 180 /* 181 * void 182 * cleanup() - performs all ONE TIME cleanup for this test at 183 * completion or premature exit. 184 * Free the memory allocated for alternate stack. 185 */ 186 void cleanup(void) 187 { 188 189 free(sigstk.ss_sp); 190 191 } 192
