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
46 pthread_mutex_t mutex;
47 pthread_cond_t cond;
48 int started;
49
50 #define HUGE_BUFFER 1<<20
51 #define NTHREADS 1
52
53 static void *
threadfunc(void * arg)54 threadfunc(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
70 ATF_TC(preempt1);
ATF_TC_HEAD(preempt1,tc)71 ATF_TC_HEAD(preempt1, tc)
72 {
73 atf_tc_set_md_var(tc, "descr",
74 "Checks kernel preemption during a large uiomove");
75 }
ATF_TC_BODY(preempt1,tc)76 ATF_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
ATF_TP_ADD_TCS(tp)123 ATF_TP_ADD_TCS(tp)
124 {
125 ATF_TP_ADD_TC(tp, preempt1);
126
127 return atf_no_error();
128 }
129