1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2024 The FreeBSD Foundation
5 *
6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
7 * under sponsorship from the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <atf-c.h>
32#include <err.h>
33#include <errno.h>
34#include <signal.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <pthread.h>
38#include <unistd.h>
39
40#define	NTHREADS	330
41static int value[NTHREADS];
42static pthread_t thr[NTHREADS];
43static pthread_barrier_t barrier;
44
45static void
46handler(int signo __unused, siginfo_t *info, void *data __unused)
47{
48	pthread_t self;
49	int i;
50
51	/*
52	 * Formally this is thread-unsafe but we know context from
53	 * where the signal is sent.
54	 */
55	self = pthread_self();
56	for (i = 0; i < NTHREADS; i++) {
57		if (pthread_equal(self, thr[i])) {
58			    value[i] = info->si_value.sival_int;
59			    pthread_exit(NULL);
60		    }
61	}
62}
63
64static void *
65threadfunc(void *arg __unused)
66{
67	pthread_barrier_wait(&barrier);
68	for (;;)
69		pause();
70}
71
72ATF_TC(pthread_sigqueue);
73ATF_TC_HEAD(pthread_sigqueue, tc)
74{
75	atf_tc_set_md_var(tc, "descr",
76	    "Checks pthread_sigqueue(3) sigval delivery");
77}
78
79ATF_TC_BODY(pthread_sigqueue, tc)
80{
81	struct sigaction sa;
82	union sigval sv;
83	int error, i;
84
85	error = pthread_barrier_init(&barrier, NULL, NTHREADS + 1);
86	ATF_REQUIRE_EQ(0, error);
87
88	memset(&sa, 0, sizeof(sa));
89	sa.sa_sigaction = handler;
90	sigemptyset(&sa.sa_mask);
91	sa.sa_flags = SA_SIGINFO;
92
93	if (sigaction(SIGUSR1, &sa, NULL) != 0)
94		atf_tc_fail("sigaction failed");
95
96	memset(&sv, 0, sizeof(sv));
97
98	for (i = 0; i < NTHREADS; i++) {
99		error = pthread_create(&thr[i], NULL, threadfunc, NULL);
100		ATF_REQUIRE_EQ(0, error);
101	}
102	error = pthread_barrier_wait(&barrier);
103	ATF_REQUIRE(error == 0 || error == PTHREAD_BARRIER_SERIAL_THREAD);
104
105	for (i = 0; i < NTHREADS; i++) {
106		sv.sival_int = i + 1000;
107		error = pthread_sigqueue(thr[i], SIGUSR1, sv);
108		ATF_REQUIRE_EQ(0, error);
109		error = pthread_join(thr[i], NULL);
110		ATF_REQUIRE_EQ(0, error);
111	}
112	for (i = 0; i < NTHREADS; i++)
113		ATF_REQUIRE_EQ(i + 1000, value[i]);
114}
115
116ATF_TP_ADD_TCS(tp)
117{
118	ATF_TP_ADD_TC(tp, pthread_sigqueue);
119	return atf_no_error();
120}
121