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 * 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); 71 ATF_TC_HEAD(preempt1, tc) 72 { 73 atf_tc_set_md_var(tc, "descr", 74 "Checks kernel preemption during a large uiomove"); 75 } 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 } 122 123 ATF_TP_ADD_TCS(tp) 124 { 125 ATF_TP_ADD_TC(tp, preempt1); 126 127 return atf_no_error(); 128 } 129