1 /* $NetBSD: t_sigqueue.c,v 1.7 2017/01/13 20:44:10 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: t_sigqueue.c,v 1.7 2017/01/13 20:44:10 christos Exp $");
34
35 #include <atf-c.h>
36 #include <err.h>
37 #include <errno.h>
38 #include <signal.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <sched.h>
42 #include <unistd.h>
43
44 static void handler(int, siginfo_t *, void *);
45
46 #define VALUE (int)0xc001dad1
47 static int value;
48
49 static void
handler(int signo __unused,siginfo_t * info,void * data __unused)50 handler(int signo __unused, siginfo_t *info, void *data __unused)
51 {
52 value = info->si_value.sival_int;
53 kill(0, SIGINFO);
54 }
55
56 ATF_TC(sigqueue_basic);
ATF_TC_HEAD(sigqueue_basic,tc)57 ATF_TC_HEAD(sigqueue_basic, tc)
58 {
59 atf_tc_set_md_var(tc, "descr", "Checks sigqueue(3) sigval delivery");
60 }
61
ATF_TC_BODY(sigqueue_basic,tc)62 ATF_TC_BODY(sigqueue_basic, tc)
63 {
64 struct sigaction sa;
65 union sigval sv;
66
67 sa.sa_sigaction = handler;
68 sigemptyset(&sa.sa_mask);
69 sa.sa_flags = SA_SIGINFO;
70
71 if (sigaction(SIGUSR1, &sa, NULL) != 0)
72 atf_tc_fail("sigaction failed");
73
74 sv.sival_int = VALUE;
75
76 #ifdef __FreeBSD__
77 /*
78 * From kern_sig.c:
79 * Specification says sigqueue can only send signal to single process.
80 */
81 if (sigqueue(getpid(), SIGUSR1, sv) != 0)
82 #else
83 if (sigqueue(0, SIGUSR1, sv) != 0)
84 #endif
85 atf_tc_fail("sigqueue failed");
86
87 sched_yield();
88 ATF_REQUIRE_EQ(sv.sival_int, value);
89 }
90
91 ATF_TC(sigqueue_err);
ATF_TC_HEAD(sigqueue_err,tc)92 ATF_TC_HEAD(sigqueue_err, tc)
93 {
94 atf_tc_set_md_var(tc, "descr", "Test errors from sigqueue(3)");
95 }
96
ATF_TC_BODY(sigqueue_err,tc)97 ATF_TC_BODY(sigqueue_err, tc)
98 {
99 static union sigval sv;
100
101 errno = 0;
102 ATF_REQUIRE_ERRNO(EINVAL, sigqueue(getpid(), -1, sv) == -1);
103 }
104
105 static int signals[] = {
106 SIGINT, SIGRTMIN + 1, SIGINT, SIGRTMIN + 0, SIGRTMIN + 2,
107 SIGQUIT, SIGRTMIN + 1
108 };
109 #ifdef __arraycount
110 #define CNT __arraycount(signals)
111 #else
112 #define CNT (sizeof(signals) / sizeof(signals[0]))
113 #endif
114
115 static sig_atomic_t count = 0;
116 static int delivered[CNT];
117
118 static void
myhandler(int signo,siginfo_t * info,void * context __unused)119 myhandler(int signo, siginfo_t *info, void *context __unused)
120 {
121 delivered[count++] = signo;
122 printf("Signal #%zu: signo: %d\n", (size_t)count, signo);
123 }
124
125 static int
asc(const void * a,const void * b)126 asc(const void *a, const void *b)
127 {
128 const int *ia = a, *ib = b;
129 return *ib - *ia;
130 }
131
132 /*
133 * given a array of signals to be delivered in tosend of size len
134 * place in ordered the signals to be delivered in delivery order
135 * and return the number of signals that should be delivered
136 */
137 static size_t
sigorder(int * ordered,const int * tosend,size_t len)138 sigorder(int *ordered, const int *tosend, size_t len)
139 {
140 memcpy(ordered, tosend, len * sizeof(*tosend));
141 qsort(ordered, len, sizeof(*ordered), asc);
142 if (len == 1)
143 return len;
144
145 #ifdef __FreeBSD__
146 /*
147 * Don't dedupe signal numbers (bug 212173)
148 *
149 * Per kib's comment..
150 *
151 * "
152 * OTOH, FreeBSD behaviour is to treat all signals as realtime while
153 * there is no mem shortage and siginfo can be allocated. In
154 * particular, signals < SIGRTMIN are not collapsed when queued more
155 * than once.
156 * "
157 */
158
159 return len;
160 #else
161
162 size_t i, j;
163 for (i = 0, j = 0; i < len - 1; i++) {
164 if (ordered[i] >= SIGRTMIN)
165 continue;
166 if (j == 0)
167 j = i + 1;
168 while (ordered[i] == ordered[j] && j < len)
169 j++;
170 if (j == len)
171 break;
172 ordered[i + 1] = ordered[j];
173 }
174 return i + 1;
175 #endif
176 }
177
178 ATF_TC(sigqueue_rt);
ATF_TC_HEAD(sigqueue_rt,tc)179 ATF_TC_HEAD(sigqueue_rt, tc)
180 {
181 atf_tc_set_md_var(tc, "descr", "Test queuing of real-time signals");
182 }
183
ATF_TC_BODY(sigqueue_rt,tc)184 ATF_TC_BODY(sigqueue_rt, tc)
185 {
186 pid_t pid;
187 union sigval val;
188 struct sigaction act;
189 int ordered[CNT];
190 struct sigaction oact[CNT];
191 size_t ndelivered;
192
193 ndelivered = sigorder(ordered, signals, CNT);
194
195 act.sa_flags = SA_SIGINFO;
196 act.sa_sigaction = myhandler;
197 sigemptyset(&act.sa_mask);
198 for (size_t i = 0; i < ndelivered; i++)
199 ATF_REQUIRE(sigaction(ordered[i], &act, &oact[i]) != -1);
200
201 val.sival_int = 0;
202 pid = getpid();
203
204 sigset_t mask, orig;
205 sigemptyset(&mask);
206 for (size_t i = 0; i < CNT; i++)
207 if (sigaddset(&mask, signals[i]) == -1)
208 warn("sigaddset");
209
210 ATF_REQUIRE(sigprocmask(SIG_BLOCK, &mask, &orig) != -1);
211
212 for (size_t i = 0; i < CNT; i++)
213 ATF_REQUIRE(sigqueue(pid, signals[i], val) != -1);
214
215 ATF_REQUIRE(sigprocmask(SIG_UNBLOCK, &mask, &orig) != -1);
216 sleep(1);
217 ATF_CHECK_MSG((size_t)count == ndelivered,
218 "count %zu != ndelivered %zu", (size_t)count, ndelivered);
219 for (size_t i = 0; i < ndelivered; i++)
220 ATF_REQUIRE_MSG(ordered[i] == delivered[i],
221 "%zu: ordered %d != delivered %d",
222 i, ordered[i], delivered[i]);
223
224 if ((size_t)count > ndelivered)
225 for (size_t i = ndelivered; i < (size_t)count; i++)
226 printf("Undelivered signal #%zu: %d\n", i, ordered[i]);
227
228 for (size_t i = 0; i < ndelivered; i++)
229 ATF_REQUIRE(sigaction(signals[i], &oact[i], NULL) != -1);
230 }
231
ATF_TP_ADD_TCS(tp)232 ATF_TP_ADD_TCS(tp)
233 {
234
235 ATF_TP_ADD_TC(tp, sigqueue_basic);
236 ATF_TP_ADD_TC(tp, sigqueue_err);
237 ATF_TP_ADD_TC(tp, sigqueue_rt);
238
239 return atf_no_error();
240 }
241