tests/lib/libpthread/t_cond.c

   1 /* $NetBSD: t_cond.c,v 1.6 2014/09/03 16:23:24 gson 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_cond.c,v 1.6 2014/09/03 16:23:24 gson Exp $");
  33
  34 #include <sys/time.h>
  35
  36 #include <errno.h>
  37 #include <pthread.h>
  38 #include <stdio.h>
  39 #include <unistd.h>
  40
  41 #include <atf-c.h>
  42
  43 #include "h_common.h"
  44
  45 static pthread_mutex_t mutex;
  46 static pthread_cond_t cond;
  47 static pthread_mutex_t static_mutex = PTHREAD_MUTEX_INITIALIZER;
  48 static pthread_cond_t static_cond = PTHREAD_COND_INITIALIZER;
  49 static int count, share, toggle, total;
  50
  51 static void *
  52 signal_delay_wait_threadfunc(void *arg)
  53 {
  54         int *shared = (int *) 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         printf("Shared value: %d. Changing to 0.\n", *shared);
  62         *shared = 0;
  63
  64         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
  65         PTHREAD_REQUIRE(pthread_cond_signal(&cond));
  66
  67         return NULL;
  68 }
  69
  70 ATF_TC(signal_delay_wait);
  71 ATF_TC_HEAD(signal_delay_wait, tc)
  72 {
  73         atf_tc_set_md_var(tc, "descr", "Checks condition variables");
  74 }
  75 ATF_TC_BODY(signal_delay_wait, tc)
  76 {
  77         pthread_t new;
  78         void *joinval;
  79         int sharedval;
  80
  81         printf("1: condition variable test 1\n");
  82
  83         PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
  84         PTHREAD_REQUIRE(pthread_cond_init(&cond, NULL));
  85
  86         PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
  87
  88         sharedval = 1;
  89
  90         PTHREAD_REQUIRE(pthread_create(&new, NULL, signal_delay_wait_threadfunc,
  91             &sharedval));
  92
  93         printf("1: Before waiting.\n");
  94         do {
  95                 sleep(2);
  96                 PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
  97                 printf("1: After waiting, in loop.\n");
  98         } while (sharedval != 0);
  99
 100         printf("1: After the loop.\n");
 101
 102         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
 103
 104         printf("1: After releasing the mutex.\n");
 105         PTHREAD_REQUIRE(pthread_join(new, &joinval));
 106
 107         printf("1: Thread joined.\n");
 108 }
 109
 110 static void *
 111 signal_before_unlock_threadfunc(void *arg)
 112 {
 113         int *shared = (int *) arg;
 114
 115         printf("2: Second thread.\n");
 116
 117         printf("2: Locking mutex\n");
 118         PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
 119         printf("2: Got mutex.\n");
 120         printf("Shared value: %d. Changing to 0.\n", *shared);
 121         *shared = 0;
 122
 123         /* Signal first, then unlock, for a different test than #1. */
 124         PTHREAD_REQUIRE(pthread_cond_signal(&cond));
 125         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
 126
 127         return NULL;
 128 }
 129
 130 ATF_TC(signal_before_unlock);
 131 ATF_TC_HEAD(signal_before_unlock, tc)
 132 {
 133         atf_tc_set_md_var(tc, "descr",
 134                 "Checks condition variables: signal before unlocking mutex");
 135 }
 136 ATF_TC_BODY(signal_before_unlock, tc)
 137 {
 138         pthread_t new;
 139         void *joinval;
 140         int sharedval;
 141
 142         printf("1: condition variable test 2\n");
 143
 144         PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
 145         PTHREAD_REQUIRE(pthread_cond_init(&cond, NULL));
 146
 147         PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
 148
 149         sharedval = 1;
 150
 151         PTHREAD_REQUIRE(pthread_create(&new, NULL,
 152             signal_before_unlock_threadfunc, &sharedval));
 153
 154         printf("1: Before waiting.\n");
 155         do {
 156                 sleep(2);
 157                 PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
 158                 printf("1: After waiting, in loop.\n");
 159         } while (sharedval != 0);
 160
 161         printf("1: After the loop.\n");
 162
 163         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
 164
 165         printf("1: After releasing the mutex.\n");
 166         PTHREAD_REQUIRE(pthread_join(new, &joinval));
 167
 168         printf("1: Thread joined.\n");
 169 }
 170
 171 static void *
 172 signal_before_unlock_static_init_threadfunc(void *arg)
 173 {
 174         int *shared = (int *) arg;
 175
 176         printf("2: Second thread.\n");
 177
 178         printf("2: Locking mutex\n");
 179         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 180         printf("2: Got mutex.\n");
 181         printf("Shared value: %d. Changing to 0.\n", *shared);
 182         *shared = 0;
 183
 184         /* Signal first, then unlock, for a different test than #1. */
 185         PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 186         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 187
 188         return NULL;
 189 }
 190
 191 ATF_TC(signal_before_unlock_static_init);
 192 ATF_TC_HEAD(signal_before_unlock_static_init, tc)
 193 {
 194         atf_tc_set_md_var(tc, "descr",
 195                 "Checks condition variables: signal before unlocking "
 196                 "mutex, use static initializers");
 197 }
 198 ATF_TC_BODY(signal_before_unlock_static_init, tc)
 199 {
 200         pthread_t new;
 201         void *joinval;
 202         int sharedval;
 203
 204         printf("1: condition variable test 3\n");
 205
 206         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 207
 208         sharedval = 1;
 209
 210         PTHREAD_REQUIRE(pthread_create(&new, NULL,
 211             signal_before_unlock_static_init_threadfunc, &sharedval));
 212
 213         printf("1: Before waiting.\n");
 214         do {
 215                 sleep(2);
 216                 PTHREAD_REQUIRE(pthread_cond_wait(&static_cond, &static_mutex));
 217                 printf("1: After waiting, in loop.\n");
 218         } while (sharedval != 0);
 219
 220         printf("1: After the loop.\n");
 221
 222         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 223
 224         printf("1: After releasing the mutex.\n");
 225         PTHREAD_REQUIRE(pthread_join(new, &joinval));
 226
 227         printf("1: Thread joined.\n");
 228 }
 229
 230 static void *
 231 signal_wait_race_threadfunc(void *arg)
 232 {
 233         printf("2: Second thread.\n");
 234         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 235         printf("2: Before the loop.\n");
 236         while (count>0) {
 237                 count--;
 238                 total++;
 239                 toggle = 0;
 240                 /* printf("2: Before signal %d.\n", count); */
 241                 PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 242                 do {
 243                         PTHREAD_REQUIRE(pthread_cond_wait(&static_cond,
 244                             &static_mutex));
 245                 } while (toggle != 1);
 246         }
 247         printf("2: After the loop.\n");
 248         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 249
 250         return NULL;
 251 }
 252
 253 ATF_TC(signal_wait_race);
 254 ATF_TC_HEAD(signal_wait_race, tc)
 255 {
 256         atf_tc_set_md_var(tc, "descr", "Checks condition variables");
 257 }
 258 ATF_TC_BODY(signal_wait_race, tc)
 259 {
 260         pthread_t new;
 261         void *joinval;
 262         int sharedval;
 263
 264         printf("1: condition variable test 4\n");
 265
 266         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 267
 268         count = 50000;
 269         toggle = 0;
 270
 271         PTHREAD_REQUIRE(pthread_create(&new, NULL, signal_wait_race_threadfunc,
 272             &sharedval));
 273
 274         printf("1: Before waiting.\n");
 275         while (count>0) {
 276                 count--;
 277                 total++;
 278                 toggle = 1;
 279                 /* printf("1: Before signal %d.\n", count); */
 280                 PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 281                 do {
 282                         PTHREAD_REQUIRE(pthread_cond_wait(&static_cond,
 283                             &static_mutex));
 284                 } while (toggle != 0);
 285         }
 286         printf("1: After the loop.\n");
 287
 288         toggle = 1;
 289         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 290         PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 291
 292         printf("1: After releasing the mutex.\n");
 293         PTHREAD_REQUIRE(pthread_join(new, &joinval));
 294
 295         printf("1: Thread joined. Final count = %d, total = %d\n",
 296                 count, total);
 297
 298         ATF_REQUIRE_EQ(count, 0);
 299         ATF_REQUIRE_EQ(total, 50000);
 300 }
 301
 302 static void *
 303 pthread_cond_timedwait_func(void *arg)
 304 {
 305         struct timespec ts;
 306         size_t i = 0;
 307         int rv;
 308
 309         for (;;) {
 310
 311                 if (i++ >= 10000)
 312                         pthread_exit(NULL);
 313
 314                 (void)memset(&ts, 0, sizeof(struct timespec));
 315
 316                 ATF_REQUIRE(clock_gettime(CLOCK_REALTIME, &ts) == 0);
 317
 318                 /*
 319                  * Set to one second in the past:
 320                  * pthread_cond_timedwait(3) should
 321                  * return ETIMEDOUT immediately.
 322                  */
 323                 ts.tv_sec = ts.tv_sec - 1;
 324
 325                 PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 326                 rv = pthread_cond_timedwait(&static_cond, &static_mutex, &ts);
 327
 328                 /*
 329                  * Sometimes we catch ESRCH.
 330                  * This should never happen.
 331                  */
 332                 ATF_REQUIRE(rv == ETIMEDOUT);
 333                 PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 334         }
 335 }
 336
 337 ATF_TC(cond_timedwait_race);
 338 ATF_TC_HEAD(cond_timedwait_race, tc)
 339 {
 340         atf_tc_set_md_var(tc, "descr", "Test pthread_cond_timedwait(3)");
 341
 342 }
 343 ATF_TC_BODY(cond_timedwait_race, tc)
 344 {
 345         pthread_t tid[64];
 346         size_t i;
 347
 348         for (i = 0; i < __arraycount(tid); i++) {
 349
 350                 PTHREAD_REQUIRE(pthread_create(&tid[i], NULL,
 351                     pthread_cond_timedwait_func, NULL));
 352         }
 353
 354         for (i = 0; i < __arraycount(tid); i++) {
 355
 356                 PTHREAD_REQUIRE(pthread_join(tid[i], NULL));
 357         }
 358 }
 359
 360 static void *
 361 broadcast_threadfunc(void *arg)
 362 {
 363         printf("2: Second thread.\n");
 364
 365         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 366         while (count>0) {
 367                 count--;
 368                 total++;
 369                 toggle = 0;
 370                 PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 371                 do {
 372                         PTHREAD_REQUIRE(pthread_cond_wait(&static_cond,
 373                             &static_mutex));
 374                 } while (toggle != 1);
 375         }
 376         printf("2: After the loop.\n");
 377         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 378
 379         return NULL;
 380 }
 381
 382
 383 ATF_TC(broadcast);
 384 ATF_TC_HEAD(broadcast, tc)
 385 {
 386         atf_tc_set_md_var(tc, "descr",
 387                 "Checks condition variables: use pthread_cond_broadcast()");
 388 }
 389 ATF_TC_BODY(broadcast, tc)
 390 {
 391         pthread_t new;
 392         void *joinval;
 393         int sharedval;
 394
 395         printf("1: condition variable test 5\n");
 396
 397         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 398
 399         count = 50000;
 400         toggle = 0;
 401
 402         PTHREAD_REQUIRE(pthread_create(&new, NULL, broadcast_threadfunc,
 403             &sharedval));
 404
 405         printf("1: Before waiting.\n");
 406         while (count>0) {
 407                 count--;
 408                 total++;
 409                 toggle = 1;
 410                 PTHREAD_REQUIRE(pthread_cond_broadcast(&static_cond));
 411                 do {
 412                         PTHREAD_REQUIRE(pthread_cond_wait(&static_cond,
 413                             &static_mutex));
 414                 } while (toggle != 0);
 415         }
 416         printf("1: After the loop.\n");
 417
 418         toggle = 1;
 419         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 420         PTHREAD_REQUIRE(pthread_cond_signal(&static_cond));
 421
 422         printf("1: After releasing the mutex.\n");
 423         PTHREAD_REQUIRE(pthread_join(new, &joinval));
 424
 425         printf("1: Thread joined. Final count = %d, total = %d\n", count,
 426             total);
 427
 428         ATF_REQUIRE_EQ(count, 0);
 429         ATF_REQUIRE_EQ(total, 50000);
 430 }
 431
 432 static void *
 433 bogus_timedwaits_threadfunc(void *arg)
 434 {
 435         return NULL;
 436 }
 437
 438 ATF_TC(bogus_timedwaits);
 439 ATF_TC_HEAD(bogus_timedwaits, tc)
 440 {
 441         atf_tc_set_md_var(tc, "descr",
 442                 "Checks condition variables: bogus timedwaits");
 443 }
 444 ATF_TC_BODY(bogus_timedwaits, tc)
 445 {
 446         pthread_t new;
 447         struct timespec ts;
 448         struct timeval tv;
 449
 450         printf("condition variable test 6: bogus timedwaits\n");
 451
 452         PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
 453
 454         printf("unthreaded test (past)\n");
 455         gettimeofday(&tv, NULL);
 456         tv.tv_sec -= 2; /* Place the time in the past */
 457         TIMEVAL_TO_TIMESPEC(&tv, &ts);
 458
 459         ATF_REQUIRE_EQ_MSG(pthread_cond_timedwait(&static_cond, &static_mutex,
 460             &ts), ETIMEDOUT, "pthread_cond_timedwait() (unthreaded) in the "
 461             "past");
 462
 463         printf("unthreaded test (zero time)\n");
 464         tv.tv_sec = 0;
 465         tv.tv_usec = 0;
 466         TIMEVAL_TO_TIMESPEC(&tv, &ts);
 467
 468         ATF_REQUIRE_EQ_MSG(pthread_cond_timedwait(&static_cond, &static_mutex,
 469             &ts), ETIMEDOUT, "pthread_cond_timedwait() (unthreaded) with zero "
 470             "time");
 471
 472         PTHREAD_REQUIRE(pthread_create(&new, NULL, bogus_timedwaits_threadfunc,
 473             NULL));
 474         PTHREAD_REQUIRE(pthread_join(new, NULL));
 475
 476         printf("threaded test\n");
 477         gettimeofday(&tv, NULL);
 478         tv.tv_sec -= 2; /* Place the time in the past */
 479         TIMEVAL_TO_TIMESPEC(&tv, &ts);
 480
 481         ATF_REQUIRE_EQ_MSG(pthread_cond_timedwait(&static_cond, &static_mutex,
 482             &ts), ETIMEDOUT, "pthread_cond_timedwait() (threaded) in the past");
 483
 484         printf("threaded test (zero time)\n");
 485         tv.tv_sec = 0;
 486         tv.tv_usec = 0;
 487         TIMEVAL_TO_TIMESPEC(&tv, &ts);
 488
 489         ATF_REQUIRE_EQ_MSG(pthread_cond_timedwait(&static_cond, &static_mutex,
 490             &ts), ETIMEDOUT, "pthread_cond_timedwait() (threaded) with zero "
 491             "time");
 492
 493         PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
 494 }
 495
 496 static void
 497 unlock(void *arg)
 498 {
 499         pthread_mutex_unlock((pthread_mutex_t *)arg);
 500 }
 501
 502 static void *
 503 destroy_after_cancel_threadfunc(void *arg)
 504 {
 505         PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
 506
 507         pthread_cleanup_push(unlock, &mutex);
 508
 509         while (1) {
 510                 share = 1;
 511                 PTHREAD_REQUIRE(pthread_cond_broadcast(&cond));
 512                 PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
 513         }
 514
 515         pthread_cleanup_pop(0);
 516         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
 517
 518         return NULL;
 519 }
 520
 521 ATF_TC(destroy_after_cancel);
 522 ATF_TC_HEAD(destroy_after_cancel, tc)
 523 {
 524         atf_tc_set_md_var(tc, "descr", "Checks destroying a condition variable "
 525             "after cancelling a wait");
 526 }
 527 ATF_TC_BODY(destroy_after_cancel, tc)
 528 {
 529         pthread_t thread;
 530
 531         PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
 532         PTHREAD_REQUIRE(pthread_cond_init(&cond, NULL));
 533         PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
 534         PTHREAD_REQUIRE(pthread_create(&thread, NULL,
 535             destroy_after_cancel_threadfunc, NULL));
 536
 537         while (share == 0) {
 538                 PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
 539         }
 540
 541         PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
 542         PTHREAD_REQUIRE(pthread_cancel(thread));
 543
 544         PTHREAD_REQUIRE(pthread_join(thread, NULL));
 545         PTHREAD_REQUIRE(pthread_cond_destroy(&cond));
 546
 547         PTHREAD_REQUIRE(pthread_mutex_destroy(&mutex));
 548 }
 549
 550 ATF_TP_ADD_TCS(tp)
 551 {
 552
 553         ATF_TP_ADD_TC(tp, signal_delay_wait);
 554         ATF_TP_ADD_TC(tp, signal_before_unlock);
 555         ATF_TP_ADD_TC(tp, signal_before_unlock_static_init);
 556         ATF_TP_ADD_TC(tp, signal_wait_race);
 557         ATF_TP_ADD_TC(tp, cond_timedwait_race);
 558         ATF_TP_ADD_TC(tp, broadcast);
 559         ATF_TP_ADD_TC(tp, bogus_timedwaits);
 560         ATF_TP_ADD_TC(tp, destroy_after_cancel);
 561
 562         return atf_no_error();
 563 }