1/* $NetBSD: t_preempt.c,v 1.2 2010/11/03 16:10:22 christos Exp $ */
2
3/*
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__COPYRIGHT("@(#) Copyright (c) 2008\
31 The NetBSD Foundation, inc. All rights reserved.");
32__RCSID("$NetBSD: t_preempt.c,v 1.2 2010/11/03 16:10:22 christos Exp $");
33
34#include <errno.h>
35#include <fcntl.h>
36#include <pthread.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <unistd.h>
41
42#include <atf-c.h>
43
44#include "h_common.h"
45
46pthread_mutex_t mutex;
47pthread_cond_t cond;
48int started;
49
50#define HUGE_BUFFER    1<<20
51#define NTHREADS    1
52
53static void *
54threadfunc(void *arg)
55{
56	printf("2: Second thread.\n");
57
58	printf("2: Locking mutex\n");
59	PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
60	printf("2: Got mutex.\n");
61	started++;
62
63	PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
64	PTHREAD_REQUIRE(pthread_cond_signal(&cond));
65	sleep(1);
66
67	return NULL;
68}
69
70ATF_TC(preempt1);
71ATF_TC_HEAD(preempt1, tc)
72{
73	atf_tc_set_md_var(tc, "descr",
74		"Checks kernel preemption during a large uiomove");
75}
76ATF_TC_BODY(preempt1, tc)
77{
78	int i;
79	ssize_t rv;
80	pthread_t new;
81	void *joinval;
82
83	char *mem;
84	int fd;
85
86	mem = malloc(HUGE_BUFFER);
87	ATF_REQUIRE_MSG(mem != NULL, "%s", strerror(errno));
88
89	fd = open("/dev/urandom", O_RDONLY, 0);
90	ATF_REQUIRE_MSG(fd != -1, "%s", strerror(errno));
91
92	printf("1: preempt test\n");
93
94	PTHREAD_REQUIRE(pthread_cond_init(&cond, NULL));
95	PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
96
97	PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
98
99	started = 0;
100
101	for (i = 0; i < NTHREADS; i++) {
102		PTHREAD_REQUIRE(pthread_create(&new, NULL, threadfunc, NULL));
103	}
104
105	while (started < NTHREADS) {
106		PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
107	}
108
109	printf("1: Thread has started.\n");
110
111	PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
112	printf("1: After releasing the mutex.\n");
113
114	rv = read(fd, mem, HUGE_BUFFER);
115	close(fd);
116	ATF_REQUIRE_EQ(rv, HUGE_BUFFER);
117
118	PTHREAD_REQUIRE(pthread_join(new, &joinval));
119
120	printf("1: Thread joined.\n");
121}
122
123ATF_TP_ADD_TCS(tp)
124{
125	ATF_TP_ADD_TC(tp, preempt1);
126
127	return atf_no_error();
128}
129