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t_condwait.c revision 1.6 
      1 /* $NetBSD: t_condwait.c,v 1.6 2019/07/09 16:24:01 maya Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2013 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 #include <sys/cdefs.h>
     29 __RCSID("$NetBSD: t_condwait.c,v 1.6 2019/07/09 16:24:01 maya Exp $");
     30 
     31 #include <sys/time.h>
     32 #include <errno.h>
     33 #include <pthread.h>
     34 #include <stdio.h>
     35 #include <stdlib.h>
     36 #include <string.h>
     37 #include <time.h>
     38 #include <unistd.h>
     39 
     40 #include <atf-c.h>
     41 
     42 #include "isqemu.h"
     43 
     44 #include "h_common.h"
     45 
     46 #define WAITTIME 2	/* Timeout wait secound */
     47 
     48 static const int debug = 1;
     49 
     50 static void *
     51 run(void *param)
     52 {
     53 	struct timespec ts, to, te;
     54 	clockid_t clck;
     55 	pthread_condattr_t attr;
     56 	pthread_cond_t cond;
     57 	pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
     58 	int ret = 0;
     59 
     60 
     61 	clck = *(clockid_t *)param;
     62 	PTHREAD_REQUIRE(pthread_condattr_init(&attr));
     63 	PTHREAD_REQUIRE(pthread_condattr_setclock(&attr, clck));
     64 	pthread_cond_init(&cond, &attr);
     65 
     66 	ATF_REQUIRE_EQ((ret = pthread_mutex_lock(&m)), 0);
     67 
     68 	ATF_REQUIRE_EQ(clock_gettime(clck, &ts), 0);
     69 	to = ts;
     70 
     71 	if (debug)
     72 		printf("started: %lld.%09ld sec\n", (long long)to.tv_sec,
     73 		    to.tv_nsec);
     74 
     75 	ts.tv_sec += WAITTIME;	/* Timeout wait */
     76 
     77 	switch (ret = pthread_cond_timedwait(&cond, &m, &ts)) {
     78 	case ETIMEDOUT:
     79 		/* Timeout */
     80 		ATF_REQUIRE_EQ(clock_gettime(clck, &te), 0);
     81 		timespecsub(&te, &to, &to);
     82 		if (debug) {
     83 			printf("timeout: %lld.%09ld sec\n",
     84 			    (long long)te.tv_sec, te.tv_nsec);
     85 			printf("elapsed: %lld.%09ld sec\n",
     86 			    (long long)to.tv_sec, to.tv_nsec);
     87 		}
     88 		if (isQEMU()) {
     89 			double to_seconds = to.tv_sec + 1e-9 * to.tv_nsec;
     90 			ATF_REQUIRE(to_seconds >= WAITTIME * 0.9);
     91 			/* Loose upper limit because of qemu timing bugs */
     92 			ATF_REQUIRE(to_seconds < WAITTIME * 2.5);
     93 		} else {
     94 			ATF_REQUIRE_EQ(to.tv_sec, WAITTIME);
     95 		}
     96 		break;
     97 	default:
     98 		ATF_REQUIRE_MSG(0, "pthread_cond_timedwait: %s", strerror(ret));
     99 	}
    100 
    101 	ATF_REQUIRE_MSG(!(ret = pthread_mutex_unlock(&m)),
    102 	    "pthread_mutex_unlock: %s", strerror(ret));
    103 	pthread_exit(&ret);
    104 }
    105 
    106 static void
    107 cond_wait(clockid_t clck, const char *msg) {
    108 	pthread_t child;
    109 
    110 	if (debug)
    111 		printf( "**** %s clock wait starting\n", msg);
    112 	ATF_REQUIRE_EQ(pthread_create(&child, NULL, run, &clck), 0);
    113 	ATF_REQUIRE_EQ(pthread_join(child, NULL), 0); /* wait for terminate */
    114 	if (debug)
    115 		printf( "**** %s clock wait ended\n", msg);
    116 }
    117 
    118 ATF_TC(cond_wait_real);
    119 ATF_TC_HEAD(cond_wait_real, tc)
    120 {
    121 	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
    122 	    "with CLOCK_REALTIME");
    123 }
    124 
    125 ATF_TC_BODY(cond_wait_real, tc) {
    126 	cond_wait(CLOCK_REALTIME, "CLOCK_REALTIME");
    127 }
    128 
    129 ATF_TC(cond_wait_mono);
    130 ATF_TC_HEAD(cond_wait_mono, tc)
    131 {
    132 	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
    133 	    "with CLOCK_MONOTONIC");
    134 }
    135 
    136 ATF_TC_BODY(cond_wait_mono, tc) {
    137 	cond_wait(CLOCK_MONOTONIC, "CLOCK_MONOTONIC");
    138 }
    139 
    140 ATF_TP_ADD_TCS(tp)
    141 {
    142 	ATF_TP_ADD_TC(tp, cond_wait_real);
    143 	ATF_TP_ADD_TC(tp, cond_wait_mono);
    144 	return atf_no_error();
    145 }
    146