pthread_test.cpp revision 92687e41bcf108957944dafa80a9bfda219bfb0f
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <gtest/gtest.h> 18 19#include <errno.h> 20#include <inttypes.h> 21#include <limits.h> 22#include <malloc.h> 23#include <pthread.h> 24#include <signal.h> 25#include <sys/mman.h> 26#include <time.h> 27#include <unistd.h> 28 29#include "ScopedSignalHandler.h" 30 31TEST(pthread, pthread_key_create) { 32 pthread_key_t key; 33 ASSERT_EQ(0, pthread_key_create(&key, NULL)); 34 ASSERT_EQ(0, pthread_key_delete(key)); 35 // Can't delete a key that's already been deleted. 36 ASSERT_EQ(EINVAL, pthread_key_delete(key)); 37} 38 39TEST(pthread, pthread_key_create_lots) { 40#if defined(__BIONIC__) // glibc uses keys internally that its sysconf value doesn't account for. 41 // POSIX says PTHREAD_KEYS_MAX should be at least 128. 42 ASSERT_GE(PTHREAD_KEYS_MAX, 128); 43 44 int sysconf_max = sysconf(_SC_THREAD_KEYS_MAX); 45 46 // sysconf shouldn't return a smaller value. 47 ASSERT_GE(sysconf_max, PTHREAD_KEYS_MAX); 48 49 // We can allocate _SC_THREAD_KEYS_MAX keys. 50 sysconf_max -= 2; // (Except that gtest takes two for itself.) 51 std::vector<pthread_key_t> keys; 52 for (int i = 0; i < sysconf_max; ++i) { 53 pthread_key_t key; 54 // If this fails, it's likely that GLOBAL_INIT_THREAD_LOCAL_BUFFER_COUNT is wrong. 55 ASSERT_EQ(0, pthread_key_create(&key, NULL)) << i << " of " << sysconf_max; 56 keys.push_back(key); 57 } 58 59 // ...and that really is the maximum. 60 pthread_key_t key; 61 ASSERT_EQ(EAGAIN, pthread_key_create(&key, NULL)); 62 63 // (Don't leak all those keys!) 64 for (size_t i = 0; i < keys.size(); ++i) { 65 ASSERT_EQ(0, pthread_key_delete(keys[i])); 66 } 67#else // __BIONIC__ 68 GTEST_LOG_(INFO) << "This test does nothing.\n"; 69#endif // __BIONIC__ 70} 71 72static void* IdFn(void* arg) { 73 return arg; 74} 75 76static void* SleepFn(void* arg) { 77 sleep(reinterpret_cast<uintptr_t>(arg)); 78 return NULL; 79} 80 81static void* SpinFn(void* arg) { 82 volatile bool* b = reinterpret_cast<volatile bool*>(arg); 83 while (!*b) { 84 } 85 return NULL; 86} 87 88static void* JoinFn(void* arg) { 89 return reinterpret_cast<void*>(pthread_join(reinterpret_cast<pthread_t>(arg), NULL)); 90} 91 92static void AssertDetached(pthread_t t, bool is_detached) { 93 pthread_attr_t attr; 94 ASSERT_EQ(0, pthread_getattr_np(t, &attr)); 95 int detach_state; 96 ASSERT_EQ(0, pthread_attr_getdetachstate(&attr, &detach_state)); 97 pthread_attr_destroy(&attr); 98 ASSERT_EQ(is_detached, (detach_state == PTHREAD_CREATE_DETACHED)); 99} 100 101static void MakeDeadThread(pthread_t& t) { 102 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, NULL)); 103 void* result; 104 ASSERT_EQ(0, pthread_join(t, &result)); 105} 106 107TEST(pthread, pthread_create) { 108 void* expected_result = reinterpret_cast<void*>(123); 109 // Can we create a thread? 110 pthread_t t; 111 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, expected_result)); 112 // If we join, do we get the expected value back? 113 void* result; 114 ASSERT_EQ(0, pthread_join(t, &result)); 115 ASSERT_EQ(expected_result, result); 116} 117 118TEST(pthread, pthread_create_EAGAIN) { 119 pthread_attr_t attributes; 120 ASSERT_EQ(0, pthread_attr_init(&attributes)); 121 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, static_cast<size_t>(-1) & ~(getpagesize() - 1))); 122 123 pthread_t t; 124 ASSERT_EQ(EAGAIN, pthread_create(&t, &attributes, IdFn, NULL)); 125} 126 127TEST(pthread, pthread_no_join_after_detach) { 128 pthread_t t1; 129 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 130 131 // After a pthread_detach... 132 ASSERT_EQ(0, pthread_detach(t1)); 133 AssertDetached(t1, true); 134 135 // ...pthread_join should fail. 136 void* result; 137 ASSERT_EQ(EINVAL, pthread_join(t1, &result)); 138} 139 140TEST(pthread, pthread_no_op_detach_after_join) { 141 bool done = false; 142 143 pthread_t t1; 144 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 145 146 // If thread 2 is already waiting to join thread 1... 147 pthread_t t2; 148 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 149 150 sleep(1); // (Give t2 a chance to call pthread_join.) 151 152 // ...a call to pthread_detach on thread 1 will "succeed" (silently fail)... 153 ASSERT_EQ(0, pthread_detach(t1)); 154 AssertDetached(t1, false); 155 156 done = true; 157 158 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 159 void* join_result; 160 ASSERT_EQ(0, pthread_join(t2, &join_result)); 161 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 162} 163 164TEST(pthread, pthread_join_self) { 165 void* result; 166 ASSERT_EQ(EDEADLK, pthread_join(pthread_self(), &result)); 167} 168 169struct TestBug37410 { 170 pthread_t main_thread; 171 pthread_mutex_t mutex; 172 173 static void main() { 174 TestBug37410 data; 175 data.main_thread = pthread_self(); 176 ASSERT_EQ(0, pthread_mutex_init(&data.mutex, NULL)); 177 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 178 179 pthread_t t; 180 ASSERT_EQ(0, pthread_create(&t, NULL, TestBug37410::thread_fn, reinterpret_cast<void*>(&data))); 181 182 // Wait for the thread to be running... 183 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 184 ASSERT_EQ(0, pthread_mutex_unlock(&data.mutex)); 185 186 // ...and exit. 187 pthread_exit(NULL); 188 } 189 190 private: 191 static void* thread_fn(void* arg) { 192 TestBug37410* data = reinterpret_cast<TestBug37410*>(arg); 193 194 // Let the main thread know we're running. 195 pthread_mutex_unlock(&data->mutex); 196 197 // And wait for the main thread to exit. 198 pthread_join(data->main_thread, NULL); 199 200 return NULL; 201 } 202}; 203 204// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to 205// run this test (which exits normally) in its own process. 206TEST(pthread_DeathTest, pthread_bug_37410) { 207 // http://code.google.com/p/android/issues/detail?id=37410 208 ::testing::FLAGS_gtest_death_test_style = "threadsafe"; 209 ASSERT_EXIT(TestBug37410::main(), ::testing::ExitedWithCode(0), ""); 210} 211 212static void* SignalHandlerFn(void* arg) { 213 sigset_t wait_set; 214 sigfillset(&wait_set); 215 return reinterpret_cast<void*>(sigwait(&wait_set, reinterpret_cast<int*>(arg))); 216} 217 218TEST(pthread, pthread_sigmask) { 219 // Check that SIGUSR1 isn't blocked. 220 sigset_t original_set; 221 sigemptyset(&original_set); 222 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &original_set)); 223 ASSERT_FALSE(sigismember(&original_set, SIGUSR1)); 224 225 // Block SIGUSR1. 226 sigset_t set; 227 sigemptyset(&set); 228 sigaddset(&set, SIGUSR1); 229 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, &set, NULL)); 230 231 // Check that SIGUSR1 is blocked. 232 sigset_t final_set; 233 sigemptyset(&final_set); 234 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &final_set)); 235 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 236 // ...and that sigprocmask agrees with pthread_sigmask. 237 sigemptyset(&final_set); 238 ASSERT_EQ(0, sigprocmask(SIG_BLOCK, NULL, &final_set)); 239 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 240 241 // Spawn a thread that calls sigwait and tells us what it received. 242 pthread_t signal_thread; 243 int received_signal = -1; 244 ASSERT_EQ(0, pthread_create(&signal_thread, NULL, SignalHandlerFn, &received_signal)); 245 246 // Send that thread SIGUSR1. 247 pthread_kill(signal_thread, SIGUSR1); 248 249 // See what it got. 250 void* join_result; 251 ASSERT_EQ(0, pthread_join(signal_thread, &join_result)); 252 ASSERT_EQ(SIGUSR1, received_signal); 253 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 254 255 // Restore the original signal mask. 256 ASSERT_EQ(0, pthread_sigmask(SIG_SETMASK, &original_set, NULL)); 257} 258 259TEST(pthread, pthread_setname_np__too_long) { 260#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 261 ASSERT_EQ(ERANGE, pthread_setname_np(pthread_self(), "this name is far too long for linux")); 262#else // __BIONIC__ 263 GTEST_LOG_(INFO) << "This test does nothing.\n"; 264#endif // __BIONIC__ 265} 266 267TEST(pthread, pthread_setname_np__self) { 268#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 269 ASSERT_EQ(0, pthread_setname_np(pthread_self(), "short 1")); 270#else // __BIONIC__ 271 GTEST_LOG_(INFO) << "This test does nothing.\n"; 272#endif // __BIONIC__ 273} 274 275TEST(pthread, pthread_setname_np__other) { 276#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 277 // Emulator kernels don't currently support setting the name of other threads. 278 char* filename = NULL; 279 asprintf(&filename, "/proc/self/task/%d/comm", gettid()); 280 struct stat sb; 281 bool has_comm = (stat(filename, &sb) != -1); 282 free(filename); 283 284 if (has_comm) { 285 pthread_t t1; 286 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 287 ASSERT_EQ(0, pthread_setname_np(t1, "short 2")); 288 } else { 289 fprintf(stderr, "skipping test: this kernel doesn't have /proc/self/task/tid/comm files!\n"); 290 } 291#else // __BIONIC__ 292 GTEST_LOG_(INFO) << "This test does nothing.\n"; 293#endif // __BIONIC__ 294} 295 296TEST(pthread, pthread_setname_np__no_such_thread) { 297#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 298 pthread_t dead_thread; 299 MakeDeadThread(dead_thread); 300 301 // Call pthread_setname_np after thread has already exited. 302 ASSERT_EQ(ESRCH, pthread_setname_np(dead_thread, "short 3")); 303#else // __BIONIC__ 304 GTEST_LOG_(INFO) << "This test does nothing.\n"; 305#endif // __BIONIC__ 306} 307 308TEST(pthread, pthread_kill__0) { 309 // Signal 0 just tests that the thread exists, so it's safe to call on ourselves. 310 ASSERT_EQ(0, pthread_kill(pthread_self(), 0)); 311} 312 313TEST(pthread, pthread_kill__invalid_signal) { 314 ASSERT_EQ(EINVAL, pthread_kill(pthread_self(), -1)); 315} 316 317static void pthread_kill__in_signal_handler_helper(int signal_number) { 318 static int count = 0; 319 ASSERT_EQ(SIGALRM, signal_number); 320 if (++count == 1) { 321 // Can we call pthread_kill from a signal handler? 322 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 323 } 324} 325 326TEST(pthread, pthread_kill__in_signal_handler) { 327 ScopedSignalHandler ssh(SIGALRM, pthread_kill__in_signal_handler_helper); 328 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 329} 330 331TEST(pthread, pthread_detach__no_such_thread) { 332 pthread_t dead_thread; 333 MakeDeadThread(dead_thread); 334 335 ASSERT_EQ(ESRCH, pthread_detach(dead_thread)); 336} 337 338TEST(pthread, pthread_detach__leak) { 339 size_t initial_bytes = mallinfo().uordblks; 340 341 pthread_attr_t attr; 342 ASSERT_EQ(0, pthread_attr_init(&attr)); 343 ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE)); 344 345 std::vector<pthread_t> threads; 346 for (size_t i = 0; i < 32; ++i) { 347 pthread_t t; 348 ASSERT_EQ(0, pthread_create(&t, &attr, IdFn, NULL)); 349 threads.push_back(t); 350 } 351 352 sleep(1); 353 354 for (size_t i = 0; i < 32; ++i) { 355 ASSERT_EQ(0, pthread_detach(threads[i])) << i; 356 } 357 358 size_t final_bytes = mallinfo().uordblks; 359 360 int leaked_bytes = (final_bytes - initial_bytes); 361 362 // User code (like this test) doesn't know how large pthread_internal_t is. 363 // We can be pretty sure it's more than 128 bytes. 364 ASSERT_LT(leaked_bytes, 32 /*threads*/ * 128 /*bytes*/); 365} 366 367TEST(pthread, pthread_getcpuclockid__clock_gettime) { 368 pthread_t t; 369 ASSERT_EQ(0, pthread_create(&t, NULL, SleepFn, reinterpret_cast<void*>(5))); 370 371 clockid_t c; 372 ASSERT_EQ(0, pthread_getcpuclockid(t, &c)); 373 timespec ts; 374 ASSERT_EQ(0, clock_gettime(c, &ts)); 375} 376 377TEST(pthread, pthread_getcpuclockid__no_such_thread) { 378 pthread_t dead_thread; 379 MakeDeadThread(dead_thread); 380 381 clockid_t c; 382 ASSERT_EQ(ESRCH, pthread_getcpuclockid(dead_thread, &c)); 383} 384 385TEST(pthread, pthread_getschedparam__no_such_thread) { 386 pthread_t dead_thread; 387 MakeDeadThread(dead_thread); 388 389 int policy; 390 sched_param param; 391 ASSERT_EQ(ESRCH, pthread_getschedparam(dead_thread, &policy, ¶m)); 392} 393 394TEST(pthread, pthread_setschedparam__no_such_thread) { 395 pthread_t dead_thread; 396 MakeDeadThread(dead_thread); 397 398 int policy = 0; 399 sched_param param; 400 ASSERT_EQ(ESRCH, pthread_setschedparam(dead_thread, policy, ¶m)); 401} 402 403TEST(pthread, pthread_join__no_such_thread) { 404 pthread_t dead_thread; 405 MakeDeadThread(dead_thread); 406 407 void* result; 408 ASSERT_EQ(ESRCH, pthread_join(dead_thread, &result)); 409} 410 411TEST(pthread, pthread_kill__no_such_thread) { 412 pthread_t dead_thread; 413 MakeDeadThread(dead_thread); 414 415 ASSERT_EQ(ESRCH, pthread_kill(dead_thread, 0)); 416} 417 418TEST(pthread, pthread_join__multijoin) { 419 bool done = false; 420 421 pthread_t t1; 422 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 423 424 pthread_t t2; 425 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 426 427 sleep(1); // (Give t2 a chance to call pthread_join.) 428 429 // Multiple joins to the same thread should fail. 430 ASSERT_EQ(EINVAL, pthread_join(t1, NULL)); 431 432 done = true; 433 434 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 435 void* join_result; 436 ASSERT_EQ(0, pthread_join(t2, &join_result)); 437 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 438} 439 440TEST(pthread, pthread_join__race) { 441 // http://b/11693195 --- pthread_join could return before the thread had actually exited. 442 // If the joiner unmapped the thread's stack, that could lead to SIGSEGV in the thread. 443 for (size_t i = 0; i < 1024; ++i) { 444 size_t stack_size = 64*1024; 445 void* stack = mmap(NULL, stack_size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); 446 447 pthread_attr_t a; 448 pthread_attr_init(&a); 449 pthread_attr_setstack(&a, stack, stack_size); 450 451 pthread_t t; 452 ASSERT_EQ(0, pthread_create(&t, &a, IdFn, NULL)); 453 ASSERT_EQ(0, pthread_join(t, NULL)); 454 ASSERT_EQ(0, munmap(stack, stack_size)); 455 } 456} 457 458static void* GetActualGuardSizeFn(void* arg) { 459 pthread_attr_t attributes; 460 pthread_getattr_np(pthread_self(), &attributes); 461 pthread_attr_getguardsize(&attributes, reinterpret_cast<size_t*>(arg)); 462 return NULL; 463} 464 465static size_t GetActualGuardSize(const pthread_attr_t& attributes) { 466 size_t result; 467 pthread_t t; 468 pthread_create(&t, &attributes, GetActualGuardSizeFn, &result); 469 void* join_result; 470 pthread_join(t, &join_result); 471 return result; 472} 473 474static void* GetActualStackSizeFn(void* arg) { 475 pthread_attr_t attributes; 476 pthread_getattr_np(pthread_self(), &attributes); 477 pthread_attr_getstacksize(&attributes, reinterpret_cast<size_t*>(arg)); 478 return NULL; 479} 480 481static size_t GetActualStackSize(const pthread_attr_t& attributes) { 482 size_t result; 483 pthread_t t; 484 pthread_create(&t, &attributes, GetActualStackSizeFn, &result); 485 void* join_result; 486 pthread_join(t, &join_result); 487 return result; 488} 489 490TEST(pthread, pthread_attr_setguardsize) { 491 pthread_attr_t attributes; 492 ASSERT_EQ(0, pthread_attr_init(&attributes)); 493 494 // Get the default guard size. 495 size_t default_guard_size; 496 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &default_guard_size)); 497 498 // No such thing as too small: will be rounded up to one page by pthread_create. 499 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 128)); 500 size_t guard_size; 501 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 502 ASSERT_EQ(128U, guard_size); 503 ASSERT_EQ(4096U, GetActualGuardSize(attributes)); 504 505 // Large enough and a multiple of the page size. 506 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024)); 507 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 508 ASSERT_EQ(32*1024U, guard_size); 509 510 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 511 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024 + 1)); 512 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 513 ASSERT_EQ(32*1024U + 1, guard_size); 514} 515 516TEST(pthread, pthread_attr_setstacksize) { 517 pthread_attr_t attributes; 518 ASSERT_EQ(0, pthread_attr_init(&attributes)); 519 520 // Get the default stack size. 521 size_t default_stack_size; 522 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &default_stack_size)); 523 524 // Too small. 525 ASSERT_EQ(EINVAL, pthread_attr_setstacksize(&attributes, 128)); 526 size_t stack_size; 527 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 528 ASSERT_EQ(default_stack_size, stack_size); 529 ASSERT_GE(GetActualStackSize(attributes), default_stack_size); 530 531 // Large enough and a multiple of the page size. 532 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024)); 533 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 534 ASSERT_EQ(32*1024U, stack_size); 535 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 536 537 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 538 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024 + 1)); 539 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 540 ASSERT_EQ(32*1024U + 1, stack_size); 541#if defined(__BIONIC__) 542 // Bionic rounds up, which is what POSIX allows. 543 ASSERT_EQ(GetActualStackSize(attributes), (32 + 4)*1024U); 544#else // __BIONIC__ 545 // glibc rounds down, in violation of POSIX. They document this in their BUGS section. 546 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 547#endif // __BIONIC__ 548} 549 550TEST(pthread, pthread_rwlock_smoke) { 551 pthread_rwlock_t l; 552 ASSERT_EQ(0, pthread_rwlock_init(&l, NULL)); 553 554 // Single read lock 555 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 556 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 557 558 // Multiple read lock 559 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 560 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 561 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 562 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 563 564 // Write lock 565 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 566 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 567 568 // Try writer lock 569 ASSERT_EQ(0, pthread_rwlock_trywrlock(&l)); 570 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 571 ASSERT_EQ(EBUSY, pthread_rwlock_tryrdlock(&l)); 572 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 573 574 // Try reader lock 575 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 576 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 577 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 578 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 579 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 580 581 // Try writer lock after unlock 582 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 583 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 584 585#ifdef __BIONIC__ 586 // EDEADLK in "read after write" 587 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 588 ASSERT_EQ(EDEADLK, pthread_rwlock_rdlock(&l)); 589 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 590 591 // EDEADLK in "write after write" 592 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 593 ASSERT_EQ(EDEADLK, pthread_rwlock_wrlock(&l)); 594 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 595#endif 596 597 ASSERT_EQ(0, pthread_rwlock_destroy(&l)); 598} 599 600static int g_once_fn_call_count = 0; 601static void OnceFn() { 602 ++g_once_fn_call_count; 603} 604 605TEST(pthread, pthread_once_smoke) { 606 pthread_once_t once_control = PTHREAD_ONCE_INIT; 607 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 608 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 609 ASSERT_EQ(1, g_once_fn_call_count); 610} 611 612static std::string pthread_once_1934122_result = ""; 613 614static void Routine2() { 615 pthread_once_1934122_result += "2"; 616} 617 618static void Routine1() { 619 pthread_once_t once_control_2 = PTHREAD_ONCE_INIT; 620 pthread_once_1934122_result += "1"; 621 pthread_once(&once_control_2, &Routine2); 622} 623 624TEST(pthread, pthread_once_1934122) { 625 // Very old versions of Android couldn't call pthread_once from a 626 // pthread_once init routine. http://b/1934122. 627 pthread_once_t once_control_1 = PTHREAD_ONCE_INIT; 628 ASSERT_EQ(0, pthread_once(&once_control_1, &Routine1)); 629 ASSERT_EQ("12", pthread_once_1934122_result); 630} 631 632static int g_atfork_prepare_calls = 0; 633static void AtForkPrepare1() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 1; } 634static void AtForkPrepare2() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 2; } 635static int g_atfork_parent_calls = 0; 636static void AtForkParent1() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 1; } 637static void AtForkParent2() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 2; } 638static int g_atfork_child_calls = 0; 639static void AtForkChild1() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 1; } 640static void AtForkChild2() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 2; } 641 642TEST(pthread, pthread_atfork) { 643 ASSERT_EQ(0, pthread_atfork(AtForkPrepare1, AtForkParent1, AtForkChild1)); 644 ASSERT_EQ(0, pthread_atfork(AtForkPrepare2, AtForkParent2, AtForkChild2)); 645 646 int pid = fork(); 647 ASSERT_NE(-1, pid) << strerror(errno); 648 649 // Child and parent calls are made in the order they were registered. 650 if (pid == 0) { 651 ASSERT_EQ(0x12, g_atfork_child_calls); 652 _exit(0); 653 } 654 ASSERT_EQ(0x12, g_atfork_parent_calls); 655 656 // Prepare calls are made in the reverse order. 657 ASSERT_EQ(0x21, g_atfork_prepare_calls); 658} 659 660TEST(pthread, pthread_attr_getscope) { 661 pthread_attr_t attr; 662 ASSERT_EQ(0, pthread_attr_init(&attr)); 663 664 int scope; 665 ASSERT_EQ(0, pthread_attr_getscope(&attr, &scope)); 666 ASSERT_EQ(PTHREAD_SCOPE_SYSTEM, scope); 667} 668 669TEST(pthread, pthread_condattr_init) { 670 pthread_condattr_t attr; 671 pthread_condattr_init(&attr); 672 673 clockid_t clock; 674 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 675 ASSERT_EQ(CLOCK_REALTIME, clock); 676 677 int pshared; 678 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 679 ASSERT_EQ(PTHREAD_PROCESS_PRIVATE, pshared); 680} 681 682TEST(pthread, pthread_condattr_setclock) { 683 pthread_condattr_t attr; 684 pthread_condattr_init(&attr); 685 686 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_REALTIME)); 687 clockid_t clock; 688 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 689 ASSERT_EQ(CLOCK_REALTIME, clock); 690 691 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 692 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 693 ASSERT_EQ(CLOCK_MONOTONIC, clock); 694 695 ASSERT_EQ(EINVAL, pthread_condattr_setclock(&attr, CLOCK_PROCESS_CPUTIME_ID)); 696} 697 698TEST(pthread, pthread_cond_broadcast__preserves_condattr_flags) { 699#if defined(__BIONIC__) // This tests a bionic implementation detail. 700 pthread_condattr_t attr; 701 pthread_condattr_init(&attr); 702 703 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 704 ASSERT_EQ(0, pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED)); 705 706 pthread_cond_t cond_var; 707 ASSERT_EQ(0, pthread_cond_init(&cond_var, &attr)); 708 709 ASSERT_EQ(0, pthread_cond_signal(&cond_var)); 710 ASSERT_EQ(0, pthread_cond_broadcast(&cond_var)); 711 712 attr = static_cast<pthread_condattr_t>(cond_var.value); 713 clockid_t clock; 714 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 715 ASSERT_EQ(CLOCK_MONOTONIC, clock); 716 int pshared; 717 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 718 ASSERT_EQ(PTHREAD_PROCESS_SHARED, pshared); 719#else // __BIONIC__ 720 GTEST_LOG_(INFO) << "This test does nothing.\n"; 721#endif // __BIONIC__ 722} 723 724TEST(pthread, pthread_mutex_timedlock) { 725 pthread_mutex_t m; 726 ASSERT_EQ(0, pthread_mutex_init(&m, NULL)); 727 728 // If the mutex is already locked, pthread_mutex_timedlock should time out. 729 ASSERT_EQ(0, pthread_mutex_lock(&m)); 730 731 timespec ts; 732 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 733 ts.tv_nsec += 1; 734 ASSERT_EQ(ETIMEDOUT, pthread_mutex_timedlock(&m, &ts)); 735 736 // If the mutex is unlocked, pthread_mutex_timedlock should succeed. 737 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 738 739 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 740 ts.tv_nsec += 1; 741 ASSERT_EQ(0, pthread_mutex_timedlock(&m, &ts)); 742 743 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 744 ASSERT_EQ(0, pthread_mutex_destroy(&m)); 745} 746