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 <errno.h>
30 #include <signal.h>
31 #include <stdbool.h>
32
33 #include <atf-c.h>
34
35 /* Return the status of the specified sig's bit. */
36 static bool
sigbitstatus(const sigset_t * set,int sig)37 sigbitstatus(const sigset_t *set, int sig)
38 {
39
40 return (set->__bits[_SIG_WORD(sig)] & _SIG_BIT(sig)) != 0;
41 }
42
43 /* Verify that sig is the lone bit set in the sigset. */
44 static void
siglonebit(const sigset_t * set,int sig)45 siglonebit(const sigset_t *set, int sig)
46 {
47 int i;
48
49 for (i = 0; i < _SIG_WORDS; ++i) {
50 if (i != _SIG_WORD(sig))
51 ATF_REQUIRE_MSG(set->__bits[i] == 0,
52 "word %d altered to %x", i, set->__bits[i]);
53 else
54 ATF_REQUIRE_MSG((set->__bits[i] & ~_SIG_BIT(sig)) == 0,
55 "word %d has other bits set: %x", i,
56 set->__bits[i] & ~_SIG_BIT(sig));
57 }
58 }
59
60 static void
sigcompare(const sigset_t * left,const sigset_t * right)61 sigcompare(const sigset_t *left, const sigset_t *right)
62 {
63 int i;
64
65 for (i = 0; i < _SIG_WORDS; ++i) {
66 ATF_REQUIRE_MSG(left->__bits[i] == right->__bits[i],
67 "sig comparison failed at %d; left=%x, right=%x",
68 i, left->__bits[i], right->__bits[i]);
69 }
70 }
71
72 /*
73 * Test implementation details of our sigsetops... make sure the correct bits
74 * are getting set, for the most part, and that duplicate operations don't
75 * error out.
76 */
77 ATF_TC_WITHOUT_HEAD(posix_sigsetop_test);
ATF_TC_BODY(posix_sigsetop_test,tc)78 ATF_TC_BODY(posix_sigsetop_test, tc)
79 {
80 sigset_t set;
81 int i;
82
83 ATF_REQUIRE(sigfillset(&set) == 0);
84 for (i = 0; i < _SIG_WORDS; ++i) {
85 ATF_REQUIRE_MSG(set.__bits[i] == ~0U, "sigfillset failed @ %d",
86 i);
87 }
88 ATF_REQUIRE(sigemptyset(&set) == 0);
89 for (i = 0; i < _SIG_WORDS; ++i) {
90 ATF_REQUIRE_MSG(set.__bits[i] == 0, "sigemptyset failed @ %d",
91 i);
92 }
93 /* Ensure that sigismember reflects the empty set status. */
94 for (i = 1; i < NSIG; ++i) {
95 ATF_REQUIRE(sigismember(&set, i) == 0);
96 }
97
98 ATF_REQUIRE(sigaddset(&set, -1) == -1 && errno == EINVAL);
99 ATF_REQUIRE(sigaddset(&set, _SIG_MAXSIG + 1) == -1 && errno == EINVAL);
100 ATF_REQUIRE(sigdelset(&set, -1) == -1 && errno == EINVAL);
101 ATF_REQUIRE(sigdelset(&set, _SIG_MAXSIG + 1) == -1 && errno == EINVAL);
102
103 ATF_REQUIRE(sigaddset(&set, SIGSEGV) == 0);
104 ATF_REQUIRE(sigismember(&set, SIGSEGV) != 0);
105 ATF_REQUIRE_MSG(sigbitstatus(&set, SIGSEGV), "sigaddset failure");
106 siglonebit(&set, SIGSEGV);
107
108 /*
109 * A second addition should succeed without altering the state. This
110 * should be trivially true.
111 */
112 ATF_REQUIRE(sigaddset(&set, SIGSEGV) == 0);
113 ATF_REQUIRE_MSG(sigbitstatus(&set, SIGSEGV),
114 "sigaddset twice changed bit");
115
116 ATF_REQUIRE(sigdelset(&set, SIGSEGV) == 0);
117 ATF_REQUIRE_MSG(!sigbitstatus(&set, SIGSEGV), "sigdelset failure");
118 ATF_REQUIRE(sigismember(&set, SIGSEGV) == 0);
119 ATF_REQUIRE(sigdelset(&set, SIGSEGV) == 0);
120 ATF_REQUIRE_MSG(!sigbitstatus(&set, SIGSEGV),
121 "sigdelset twice changed bit");
122 for (i = 0; i < _SIG_WORDS; ++i) {
123 ATF_REQUIRE_MSG(set.__bits[i] == 0, "set not empty @ %d",
124 i);
125 }
126 for (i = 1; i < NSIG; ++i) {
127 ATF_REQUIRE(sigismember(&set, i) == 0);
128 }
129 }
130
131 /*
132 * Test extended sigset ops for union/intersection and testing of empty set.
133 */
134 ATF_TC_WITHOUT_HEAD(extended_sigsetop_test);
ATF_TC_BODY(extended_sigsetop_test,tc)135 ATF_TC_BODY(extended_sigsetop_test, tc)
136 {
137 sigset_t chkset, set1, set2, set3;
138
139 sigemptyset(&chkset);
140 sigemptyset(&set1);
141 sigemptyset(&set2);
142 ATF_REQUIRE(sigisemptyset(&chkset) != 0);
143 sigaddset(&set1, SIGSEGV);
144 sigaddset(&set2, SIGKILL);
145 sigaddset(&chkset, SIGSEGV);
146 ATF_REQUIRE(sigisemptyset(&chkset) == 0);
147 sigaddset(&chkset, SIGKILL);
148 ATF_REQUIRE(sigorset(&set3, &set1, &set2) == 0);
149 ATF_REQUIRE(sigbitstatus(&set3, SIGSEGV));
150 ATF_REQUIRE(sigbitstatus(&set3, SIGKILL));
151
152 /*
153 * chkset was built with our POSIX-specified set operations that we've
154 * already tested, so it's a good comparison.
155 */
156 sigcompare(&chkset, &set3);
157 /*
158 * Clear chkset; make sure sigisemptyset() still looks ok. sigaddset
159 * and sigdelset have already been tested to make sure that they're not
160 * touching other bits.
161 */
162 sigdelset(&chkset, SIGSEGV);
163 sigdelset(&chkset, SIGKILL);
164 ATF_REQUIRE(sigisemptyset(&chkset) != 0);
165 ATF_REQUIRE(sigandset(&set3, &set1, &set2) == 0);
166 /* Make sure we clobbered these. */
167 ATF_REQUIRE(!sigbitstatus(&set3, SIGSEGV));
168 ATF_REQUIRE(!sigbitstatus(&set3, SIGKILL));
169 ATF_REQUIRE(sigisemptyset(&set3) != 0);
170 /* Rebuild for sigandset test */
171 sigemptyset(&set1);
172 sigemptyset(&set2);
173 sigaddset(&set1, SIGSEGV);
174 sigaddset(&set1, SIGKILL);
175 sigaddset(&set2, SIGSEGV);
176 ATF_REQUIRE(sigandset(&set3, &set1, &set2) == 0);
177 ATF_REQUIRE(sigbitstatus(&set3, SIGSEGV));
178 ATF_REQUIRE(!sigbitstatus(&set3, SIGKILL));
179 }
180
ATF_TP_ADD_TCS(tp)181 ATF_TP_ADD_TCS(tp)
182 {
183
184 ATF_TP_ADD_TC(tp, posix_sigsetop_test);
185 ATF_TP_ADD_TC(tp, extended_sigsetop_test);
186
187 return (atf_no_error());
188 }
189