1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <errno.h> 31 #include <signal.h> 32 #include <stdbool.h> 33 34 #include <atf-c.h> 35 36 /* Return the status of the specified sig's bit. */ 37 static bool 38 sigbitstatus(const sigset_t *set, int sig) 39 { 40 41 return (set->__bits[_SIG_WORD(sig)] & _SIG_BIT(sig)) != 0; 42 } 43 44 /* Verify that sig is the lone bit set in the sigset. */ 45 static void 46 siglonebit(const sigset_t *set, int sig) 47 { 48 int i; 49 50 for (i = 0; i < _SIG_WORDS; ++i) { 51 if (i != _SIG_WORD(sig)) 52 ATF_REQUIRE_MSG(set->__bits[i] == 0, 53 "word %d altered to %x", i, set->__bits[i]); 54 else 55 ATF_REQUIRE_MSG((set->__bits[i] & ~_SIG_BIT(sig)) == 0, 56 "word %d has other bits set: %x", i, 57 set->__bits[i] & ~_SIG_BIT(sig)); 58 } 59 } 60 61 static void 62 sigcompare(const sigset_t *left, const sigset_t *right) 63 { 64 int i; 65 66 for (i = 0; i < _SIG_WORDS; ++i) { 67 ATF_REQUIRE_MSG(left->__bits[i] == right->__bits[i], 68 "sig comparison failed at %d; left=%x, right=%x", 69 i, left->__bits[i], right->__bits[i]); 70 } 71 } 72 73 /* 74 * Test implementation details of our sigsetops... make sure the correct bits 75 * are getting set, for the most part, and that duplicate operations don't 76 * error out. 77 */ 78 ATF_TC_WITHOUT_HEAD(posix_sigsetop_test); 79 ATF_TC_BODY(posix_sigsetop_test, tc) 80 { 81 sigset_t set; 82 int i; 83 84 ATF_REQUIRE(sigfillset(&set) == 0); 85 for (i = 0; i < _SIG_WORDS; ++i) { 86 ATF_REQUIRE_MSG(set.__bits[i] == ~0U, "sigfillset failed @ %d", 87 i); 88 } 89 ATF_REQUIRE(sigemptyset(&set) == 0); 90 for (i = 0; i < _SIG_WORDS; ++i) { 91 ATF_REQUIRE_MSG(set.__bits[i] == 0, "sigemptyset failed @ %d", 92 i); 93 } 94 /* Ensure that sigismember reflects the empty set status. */ 95 for (i = 1; i < NSIG; ++i) { 96 ATF_REQUIRE(sigismember(&set, i) == 0); 97 } 98 99 ATF_REQUIRE(sigaddset(&set, -1) == -1 && errno == EINVAL); 100 ATF_REQUIRE(sigaddset(&set, _SIG_MAXSIG + 1) == -1 && errno == EINVAL); 101 ATF_REQUIRE(sigdelset(&set, -1) == -1 && errno == EINVAL); 102 ATF_REQUIRE(sigdelset(&set, _SIG_MAXSIG + 1) == -1 && errno == EINVAL); 103 104 ATF_REQUIRE(sigaddset(&set, SIGSEGV) == 0); 105 ATF_REQUIRE(sigismember(&set, SIGSEGV) != 0); 106 ATF_REQUIRE_MSG(sigbitstatus(&set, SIGSEGV), "sigaddset failure"); 107 siglonebit(&set, SIGSEGV); 108 109 /* 110 * A second addition should succeed without altering the state. This 111 * should be trivially true. 112 */ 113 ATF_REQUIRE(sigaddset(&set, SIGSEGV) == 0); 114 ATF_REQUIRE_MSG(sigbitstatus(&set, SIGSEGV), 115 "sigaddset twice changed bit"); 116 117 ATF_REQUIRE(sigdelset(&set, SIGSEGV) == 0); 118 ATF_REQUIRE_MSG(!sigbitstatus(&set, SIGSEGV), "sigdelset failure"); 119 ATF_REQUIRE(sigismember(&set, SIGSEGV) == 0); 120 ATF_REQUIRE(sigdelset(&set, SIGSEGV) == 0); 121 ATF_REQUIRE_MSG(!sigbitstatus(&set, SIGSEGV), 122 "sigdelset twice changed bit"); 123 for (i = 0; i < _SIG_WORDS; ++i) { 124 ATF_REQUIRE_MSG(set.__bits[i] == 0, "set not empty @ %d", 125 i); 126 } 127 for (i = 1; i < NSIG; ++i) { 128 ATF_REQUIRE(sigismember(&set, i) == 0); 129 } 130 } 131 132 /* 133 * Test extended sigset ops for union/intersection and testing of empty set. 134 */ 135 ATF_TC_WITHOUT_HEAD(extended_sigsetop_test); 136 ATF_TC_BODY(extended_sigsetop_test, tc) 137 { 138 sigset_t chkset, set1, set2, set3; 139 140 sigemptyset(&chkset); 141 sigemptyset(&set1); 142 sigemptyset(&set2); 143 ATF_REQUIRE(sigisemptyset(&chkset) != 0); 144 sigaddset(&set1, SIGSEGV); 145 sigaddset(&set2, SIGKILL); 146 sigaddset(&chkset, SIGSEGV); 147 ATF_REQUIRE(sigisemptyset(&chkset) == 0); 148 sigaddset(&chkset, SIGKILL); 149 ATF_REQUIRE(sigorset(&set3, &set1, &set2) == 0); 150 ATF_REQUIRE(sigbitstatus(&set3, SIGSEGV)); 151 ATF_REQUIRE(sigbitstatus(&set3, SIGKILL)); 152 153 /* 154 * chkset was built with our POSIX-specified set operations that we've 155 * already tested, so it's a good comparison. 156 */ 157 sigcompare(&chkset, &set3); 158 /* 159 * Clear chkset; make sure sigisemptyset() still looks ok. sigaddset 160 * and sigdelset have already been tested to make sure that they're not 161 * touching other bits. 162 */ 163 sigdelset(&chkset, SIGSEGV); 164 sigdelset(&chkset, SIGKILL); 165 ATF_REQUIRE(sigisemptyset(&chkset) != 0); 166 ATF_REQUIRE(sigandset(&set3, &set1, &set2) == 0); 167 /* Make sure we clobbered these. */ 168 ATF_REQUIRE(!sigbitstatus(&set3, SIGSEGV)); 169 ATF_REQUIRE(!sigbitstatus(&set3, SIGKILL)); 170 ATF_REQUIRE(sigisemptyset(&set3) != 0); 171 /* Rebuild for sigandset test */ 172 sigemptyset(&set1); 173 sigemptyset(&set2); 174 sigaddset(&set1, SIGSEGV); 175 sigaddset(&set1, SIGKILL); 176 sigaddset(&set2, SIGSEGV); 177 ATF_REQUIRE(sigandset(&set3, &set1, &set2) == 0); 178 ATF_REQUIRE(sigbitstatus(&set3, SIGSEGV)); 179 ATF_REQUIRE(!sigbitstatus(&set3, SIGKILL)); 180 } 181 182 ATF_TP_ADD_TCS(tp) 183 { 184 185 ATF_TP_ADD_TC(tp, posix_sigsetop_test); 186 ATF_TP_ADD_TC(tp, extended_sigsetop_test); 187 188 return (atf_no_error()); 189 } 190