pthread_test.cpp revision ebb770f90d9a8d7f75a9d8b0e6a96ded96c617af
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 72TEST(pthread, pthread_key_delete) { 73 void* expected = reinterpret_cast<void*>(1234); 74 pthread_key_t key; 75 ASSERT_EQ(0, pthread_key_create(&key, NULL)); 76 ASSERT_EQ(0, pthread_setspecific(key, expected)); 77 ASSERT_EQ(expected, pthread_getspecific(key)); 78 ASSERT_EQ(0, pthread_key_delete(key)); 79 // After deletion, pthread_getspecific returns NULL. 80 ASSERT_EQ(NULL, pthread_getspecific(key)); 81 // And you can't use pthread_setspecific with the deleted key. 82 ASSERT_EQ(EINVAL, pthread_setspecific(key, expected)); 83} 84 85static void* IdFn(void* arg) { 86 return arg; 87} 88 89static void* SleepFn(void* arg) { 90 sleep(reinterpret_cast<uintptr_t>(arg)); 91 return NULL; 92} 93 94static void* SpinFn(void* arg) { 95 volatile bool* b = reinterpret_cast<volatile bool*>(arg); 96 while (!*b) { 97 } 98 return NULL; 99} 100 101static void* JoinFn(void* arg) { 102 return reinterpret_cast<void*>(pthread_join(reinterpret_cast<pthread_t>(arg), NULL)); 103} 104 105static void AssertDetached(pthread_t t, bool is_detached) { 106 pthread_attr_t attr; 107 ASSERT_EQ(0, pthread_getattr_np(t, &attr)); 108 int detach_state; 109 ASSERT_EQ(0, pthread_attr_getdetachstate(&attr, &detach_state)); 110 pthread_attr_destroy(&attr); 111 ASSERT_EQ(is_detached, (detach_state == PTHREAD_CREATE_DETACHED)); 112} 113 114static void MakeDeadThread(pthread_t& t) { 115 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, NULL)); 116 void* result; 117 ASSERT_EQ(0, pthread_join(t, &result)); 118} 119 120TEST(pthread, pthread_create) { 121 void* expected_result = reinterpret_cast<void*>(123); 122 // Can we create a thread? 123 pthread_t t; 124 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, expected_result)); 125 // If we join, do we get the expected value back? 126 void* result; 127 ASSERT_EQ(0, pthread_join(t, &result)); 128 ASSERT_EQ(expected_result, result); 129} 130 131TEST(pthread, pthread_create_EAGAIN) { 132 pthread_attr_t attributes; 133 ASSERT_EQ(0, pthread_attr_init(&attributes)); 134 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, static_cast<size_t>(-1) & ~(getpagesize() - 1))); 135 136 pthread_t t; 137 ASSERT_EQ(EAGAIN, pthread_create(&t, &attributes, IdFn, NULL)); 138} 139 140TEST(pthread, pthread_no_join_after_detach) { 141 pthread_t t1; 142 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 143 144 // After a pthread_detach... 145 ASSERT_EQ(0, pthread_detach(t1)); 146 AssertDetached(t1, true); 147 148 // ...pthread_join should fail. 149 void* result; 150 ASSERT_EQ(EINVAL, pthread_join(t1, &result)); 151} 152 153TEST(pthread, pthread_no_op_detach_after_join) { 154 bool done = false; 155 156 pthread_t t1; 157 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 158 159 // If thread 2 is already waiting to join thread 1... 160 pthread_t t2; 161 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 162 163 sleep(1); // (Give t2 a chance to call pthread_join.) 164 165 // ...a call to pthread_detach on thread 1 will "succeed" (silently fail)... 166 ASSERT_EQ(0, pthread_detach(t1)); 167 AssertDetached(t1, false); 168 169 done = true; 170 171 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 172 void* join_result; 173 ASSERT_EQ(0, pthread_join(t2, &join_result)); 174 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 175} 176 177TEST(pthread, pthread_join_self) { 178 void* result; 179 ASSERT_EQ(EDEADLK, pthread_join(pthread_self(), &result)); 180} 181 182struct TestBug37410 { 183 pthread_t main_thread; 184 pthread_mutex_t mutex; 185 186 static void main() { 187 TestBug37410 data; 188 data.main_thread = pthread_self(); 189 ASSERT_EQ(0, pthread_mutex_init(&data.mutex, NULL)); 190 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 191 192 pthread_t t; 193 ASSERT_EQ(0, pthread_create(&t, NULL, TestBug37410::thread_fn, reinterpret_cast<void*>(&data))); 194 195 // Wait for the thread to be running... 196 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 197 ASSERT_EQ(0, pthread_mutex_unlock(&data.mutex)); 198 199 // ...and exit. 200 pthread_exit(NULL); 201 } 202 203 private: 204 static void* thread_fn(void* arg) { 205 TestBug37410* data = reinterpret_cast<TestBug37410*>(arg); 206 207 // Let the main thread know we're running. 208 pthread_mutex_unlock(&data->mutex); 209 210 // And wait for the main thread to exit. 211 pthread_join(data->main_thread, NULL); 212 213 return NULL; 214 } 215}; 216 217// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to 218// run this test (which exits normally) in its own process. 219TEST(pthread_DeathTest, pthread_bug_37410) { 220 // http://code.google.com/p/android/issues/detail?id=37410 221 ::testing::FLAGS_gtest_death_test_style = "threadsafe"; 222 ASSERT_EXIT(TestBug37410::main(), ::testing::ExitedWithCode(0), ""); 223} 224 225static void* SignalHandlerFn(void* arg) { 226 sigset_t wait_set; 227 sigfillset(&wait_set); 228 return reinterpret_cast<void*>(sigwait(&wait_set, reinterpret_cast<int*>(arg))); 229} 230 231TEST(pthread, pthread_sigmask) { 232 // Check that SIGUSR1 isn't blocked. 233 sigset_t original_set; 234 sigemptyset(&original_set); 235 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &original_set)); 236 ASSERT_FALSE(sigismember(&original_set, SIGUSR1)); 237 238 // Block SIGUSR1. 239 sigset_t set; 240 sigemptyset(&set); 241 sigaddset(&set, SIGUSR1); 242 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, &set, NULL)); 243 244 // Check that SIGUSR1 is blocked. 245 sigset_t final_set; 246 sigemptyset(&final_set); 247 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &final_set)); 248 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 249 // ...and that sigprocmask agrees with pthread_sigmask. 250 sigemptyset(&final_set); 251 ASSERT_EQ(0, sigprocmask(SIG_BLOCK, NULL, &final_set)); 252 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 253 254 // Spawn a thread that calls sigwait and tells us what it received. 255 pthread_t signal_thread; 256 int received_signal = -1; 257 ASSERT_EQ(0, pthread_create(&signal_thread, NULL, SignalHandlerFn, &received_signal)); 258 259 // Send that thread SIGUSR1. 260 pthread_kill(signal_thread, SIGUSR1); 261 262 // See what it got. 263 void* join_result; 264 ASSERT_EQ(0, pthread_join(signal_thread, &join_result)); 265 ASSERT_EQ(SIGUSR1, received_signal); 266 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 267 268 // Restore the original signal mask. 269 ASSERT_EQ(0, pthread_sigmask(SIG_SETMASK, &original_set, NULL)); 270} 271 272TEST(pthread, pthread_setname_np__too_long) { 273#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 274 ASSERT_EQ(ERANGE, pthread_setname_np(pthread_self(), "this name is far too long for linux")); 275#else // __BIONIC__ 276 GTEST_LOG_(INFO) << "This test does nothing.\n"; 277#endif // __BIONIC__ 278} 279 280TEST(pthread, pthread_setname_np__self) { 281#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 282 ASSERT_EQ(0, pthread_setname_np(pthread_self(), "short 1")); 283#else // __BIONIC__ 284 GTEST_LOG_(INFO) << "This test does nothing.\n"; 285#endif // __BIONIC__ 286} 287 288TEST(pthread, pthread_setname_np__other) { 289#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 290 // Emulator kernels don't currently support setting the name of other threads. 291 char* filename = NULL; 292 asprintf(&filename, "/proc/self/task/%d/comm", gettid()); 293 struct stat sb; 294 bool has_comm = (stat(filename, &sb) != -1); 295 free(filename); 296 297 if (has_comm) { 298 pthread_t t1; 299 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 300 ASSERT_EQ(0, pthread_setname_np(t1, "short 2")); 301 } else { 302 fprintf(stderr, "skipping test: this kernel doesn't have /proc/self/task/tid/comm files!\n"); 303 } 304#else // __BIONIC__ 305 GTEST_LOG_(INFO) << "This test does nothing.\n"; 306#endif // __BIONIC__ 307} 308 309TEST(pthread, pthread_setname_np__no_such_thread) { 310#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 311 pthread_t dead_thread; 312 MakeDeadThread(dead_thread); 313 314 // Call pthread_setname_np after thread has already exited. 315 ASSERT_EQ(ESRCH, pthread_setname_np(dead_thread, "short 3")); 316#else // __BIONIC__ 317 GTEST_LOG_(INFO) << "This test does nothing.\n"; 318#endif // __BIONIC__ 319} 320 321TEST(pthread, pthread_kill__0) { 322 // Signal 0 just tests that the thread exists, so it's safe to call on ourselves. 323 ASSERT_EQ(0, pthread_kill(pthread_self(), 0)); 324} 325 326TEST(pthread, pthread_kill__invalid_signal) { 327 ASSERT_EQ(EINVAL, pthread_kill(pthread_self(), -1)); 328} 329 330static void pthread_kill__in_signal_handler_helper(int signal_number) { 331 static int count = 0; 332 ASSERT_EQ(SIGALRM, signal_number); 333 if (++count == 1) { 334 // Can we call pthread_kill from a signal handler? 335 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 336 } 337} 338 339TEST(pthread, pthread_kill__in_signal_handler) { 340 ScopedSignalHandler ssh(SIGALRM, pthread_kill__in_signal_handler_helper); 341 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 342} 343 344TEST(pthread, pthread_detach__no_such_thread) { 345 pthread_t dead_thread; 346 MakeDeadThread(dead_thread); 347 348 ASSERT_EQ(ESRCH, pthread_detach(dead_thread)); 349} 350 351TEST(pthread, pthread_detach__leak) { 352 size_t initial_bytes = mallinfo().uordblks; 353 354 pthread_attr_t attr; 355 ASSERT_EQ(0, pthread_attr_init(&attr)); 356 ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE)); 357 358 std::vector<pthread_t> threads; 359 for (size_t i = 0; i < 32; ++i) { 360 pthread_t t; 361 ASSERT_EQ(0, pthread_create(&t, &attr, IdFn, NULL)); 362 threads.push_back(t); 363 } 364 365 sleep(1); 366 367 for (size_t i = 0; i < 32; ++i) { 368 ASSERT_EQ(0, pthread_detach(threads[i])) << i; 369 } 370 371 size_t final_bytes = mallinfo().uordblks; 372 373 int leaked_bytes = (final_bytes - initial_bytes); 374 375 // User code (like this test) doesn't know how large pthread_internal_t is. 376 // We can be pretty sure it's more than 128 bytes. 377 ASSERT_LT(leaked_bytes, 32 /*threads*/ * 128 /*bytes*/); 378} 379 380TEST(pthread, pthread_getcpuclockid__clock_gettime) { 381 pthread_t t; 382 ASSERT_EQ(0, pthread_create(&t, NULL, SleepFn, reinterpret_cast<void*>(5))); 383 384 clockid_t c; 385 ASSERT_EQ(0, pthread_getcpuclockid(t, &c)); 386 timespec ts; 387 ASSERT_EQ(0, clock_gettime(c, &ts)); 388} 389 390TEST(pthread, pthread_getcpuclockid__no_such_thread) { 391 pthread_t dead_thread; 392 MakeDeadThread(dead_thread); 393 394 clockid_t c; 395 ASSERT_EQ(ESRCH, pthread_getcpuclockid(dead_thread, &c)); 396} 397 398TEST(pthread, pthread_getschedparam__no_such_thread) { 399 pthread_t dead_thread; 400 MakeDeadThread(dead_thread); 401 402 int policy; 403 sched_param param; 404 ASSERT_EQ(ESRCH, pthread_getschedparam(dead_thread, &policy, ¶m)); 405} 406 407TEST(pthread, pthread_setschedparam__no_such_thread) { 408 pthread_t dead_thread; 409 MakeDeadThread(dead_thread); 410 411 int policy = 0; 412 sched_param param; 413 ASSERT_EQ(ESRCH, pthread_setschedparam(dead_thread, policy, ¶m)); 414} 415 416TEST(pthread, pthread_join__no_such_thread) { 417 pthread_t dead_thread; 418 MakeDeadThread(dead_thread); 419 420 void* result; 421 ASSERT_EQ(ESRCH, pthread_join(dead_thread, &result)); 422} 423 424TEST(pthread, pthread_kill__no_such_thread) { 425 pthread_t dead_thread; 426 MakeDeadThread(dead_thread); 427 428 ASSERT_EQ(ESRCH, pthread_kill(dead_thread, 0)); 429} 430 431TEST(pthread, pthread_join__multijoin) { 432 bool done = false; 433 434 pthread_t t1; 435 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 436 437 pthread_t t2; 438 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 439 440 sleep(1); // (Give t2 a chance to call pthread_join.) 441 442 // Multiple joins to the same thread should fail. 443 ASSERT_EQ(EINVAL, pthread_join(t1, NULL)); 444 445 done = true; 446 447 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 448 void* join_result; 449 ASSERT_EQ(0, pthread_join(t2, &join_result)); 450 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 451} 452 453TEST(pthread, pthread_join__race) { 454 // http://b/11693195 --- pthread_join could return before the thread had actually exited. 455 // If the joiner unmapped the thread's stack, that could lead to SIGSEGV in the thread. 456 for (size_t i = 0; i < 1024; ++i) { 457 size_t stack_size = 64*1024; 458 void* stack = mmap(NULL, stack_size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); 459 460 pthread_attr_t a; 461 pthread_attr_init(&a); 462 pthread_attr_setstack(&a, stack, stack_size); 463 464 pthread_t t; 465 ASSERT_EQ(0, pthread_create(&t, &a, IdFn, NULL)); 466 ASSERT_EQ(0, pthread_join(t, NULL)); 467 ASSERT_EQ(0, munmap(stack, stack_size)); 468 } 469} 470 471static void* GetActualGuardSizeFn(void* arg) { 472 pthread_attr_t attributes; 473 pthread_getattr_np(pthread_self(), &attributes); 474 pthread_attr_getguardsize(&attributes, reinterpret_cast<size_t*>(arg)); 475 return NULL; 476} 477 478static size_t GetActualGuardSize(const pthread_attr_t& attributes) { 479 size_t result; 480 pthread_t t; 481 pthread_create(&t, &attributes, GetActualGuardSizeFn, &result); 482 void* join_result; 483 pthread_join(t, &join_result); 484 return result; 485} 486 487static void* GetActualStackSizeFn(void* arg) { 488 pthread_attr_t attributes; 489 pthread_getattr_np(pthread_self(), &attributes); 490 pthread_attr_getstacksize(&attributes, reinterpret_cast<size_t*>(arg)); 491 return NULL; 492} 493 494static size_t GetActualStackSize(const pthread_attr_t& attributes) { 495 size_t result; 496 pthread_t t; 497 pthread_create(&t, &attributes, GetActualStackSizeFn, &result); 498 void* join_result; 499 pthread_join(t, &join_result); 500 return result; 501} 502 503TEST(pthread, pthread_attr_setguardsize) { 504 pthread_attr_t attributes; 505 ASSERT_EQ(0, pthread_attr_init(&attributes)); 506 507 // Get the default guard size. 508 size_t default_guard_size; 509 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &default_guard_size)); 510 511 // No such thing as too small: will be rounded up to one page by pthread_create. 512 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 128)); 513 size_t guard_size; 514 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 515 ASSERT_EQ(128U, guard_size); 516 ASSERT_EQ(4096U, GetActualGuardSize(attributes)); 517 518 // Large enough and a multiple of the page size. 519 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024)); 520 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 521 ASSERT_EQ(32*1024U, guard_size); 522 523 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 524 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024 + 1)); 525 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 526 ASSERT_EQ(32*1024U + 1, guard_size); 527} 528 529TEST(pthread, pthread_attr_setstacksize) { 530 pthread_attr_t attributes; 531 ASSERT_EQ(0, pthread_attr_init(&attributes)); 532 533 // Get the default stack size. 534 size_t default_stack_size; 535 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &default_stack_size)); 536 537 // Too small. 538 ASSERT_EQ(EINVAL, pthread_attr_setstacksize(&attributes, 128)); 539 size_t stack_size; 540 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 541 ASSERT_EQ(default_stack_size, stack_size); 542 ASSERT_GE(GetActualStackSize(attributes), default_stack_size); 543 544 // Large enough and a multiple of the page size. 545 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024)); 546 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 547 ASSERT_EQ(32*1024U, stack_size); 548 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 549 550 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 551 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024 + 1)); 552 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 553 ASSERT_EQ(32*1024U + 1, stack_size); 554#if defined(__BIONIC__) 555 // Bionic rounds up, which is what POSIX allows. 556 ASSERT_EQ(GetActualStackSize(attributes), (32 + 4)*1024U); 557#else // __BIONIC__ 558 // glibc rounds down, in violation of POSIX. They document this in their BUGS section. 559 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 560#endif // __BIONIC__ 561} 562 563TEST(pthread, pthread_rwlock_smoke) { 564 pthread_rwlock_t l; 565 ASSERT_EQ(0, pthread_rwlock_init(&l, NULL)); 566 567 // Single read lock 568 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 569 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 570 571 // Multiple read lock 572 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 573 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 574 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 575 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 576 577 // Write lock 578 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 579 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 580 581 // Try writer lock 582 ASSERT_EQ(0, pthread_rwlock_trywrlock(&l)); 583 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 584 ASSERT_EQ(EBUSY, pthread_rwlock_tryrdlock(&l)); 585 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 586 587 // Try reader lock 588 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 589 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 590 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 591 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 592 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 593 594 // Try writer lock after unlock 595 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 596 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 597 598#ifdef __BIONIC__ 599 // EDEADLK in "read after write" 600 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 601 ASSERT_EQ(EDEADLK, pthread_rwlock_rdlock(&l)); 602 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 603 604 // EDEADLK in "write after write" 605 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 606 ASSERT_EQ(EDEADLK, pthread_rwlock_wrlock(&l)); 607 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 608#endif 609 610 ASSERT_EQ(0, pthread_rwlock_destroy(&l)); 611} 612 613static int g_once_fn_call_count = 0; 614static void OnceFn() { 615 ++g_once_fn_call_count; 616} 617 618TEST(pthread, pthread_once_smoke) { 619 pthread_once_t once_control = PTHREAD_ONCE_INIT; 620 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 621 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 622 ASSERT_EQ(1, g_once_fn_call_count); 623} 624 625static std::string pthread_once_1934122_result = ""; 626 627static void Routine2() { 628 pthread_once_1934122_result += "2"; 629} 630 631static void Routine1() { 632 pthread_once_t once_control_2 = PTHREAD_ONCE_INIT; 633 pthread_once_1934122_result += "1"; 634 pthread_once(&once_control_2, &Routine2); 635} 636 637TEST(pthread, pthread_once_1934122) { 638 // Very old versions of Android couldn't call pthread_once from a 639 // pthread_once init routine. http://b/1934122. 640 pthread_once_t once_control_1 = PTHREAD_ONCE_INIT; 641 ASSERT_EQ(0, pthread_once(&once_control_1, &Routine1)); 642 ASSERT_EQ("12", pthread_once_1934122_result); 643} 644 645static int g_atfork_prepare_calls = 0; 646static void AtForkPrepare1() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 1; } 647static void AtForkPrepare2() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 2; } 648static int g_atfork_parent_calls = 0; 649static void AtForkParent1() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 1; } 650static void AtForkParent2() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 2; } 651static int g_atfork_child_calls = 0; 652static void AtForkChild1() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 1; } 653static void AtForkChild2() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 2; } 654 655TEST(pthread, pthread_atfork) { 656 ASSERT_EQ(0, pthread_atfork(AtForkPrepare1, AtForkParent1, AtForkChild1)); 657 ASSERT_EQ(0, pthread_atfork(AtForkPrepare2, AtForkParent2, AtForkChild2)); 658 659 int pid = fork(); 660 ASSERT_NE(-1, pid) << strerror(errno); 661 662 // Child and parent calls are made in the order they were registered. 663 if (pid == 0) { 664 ASSERT_EQ(0x12, g_atfork_child_calls); 665 _exit(0); 666 } 667 ASSERT_EQ(0x12, g_atfork_parent_calls); 668 669 // Prepare calls are made in the reverse order. 670 ASSERT_EQ(0x21, g_atfork_prepare_calls); 671} 672 673TEST(pthread, pthread_attr_getscope) { 674 pthread_attr_t attr; 675 ASSERT_EQ(0, pthread_attr_init(&attr)); 676 677 int scope; 678 ASSERT_EQ(0, pthread_attr_getscope(&attr, &scope)); 679 ASSERT_EQ(PTHREAD_SCOPE_SYSTEM, scope); 680} 681 682TEST(pthread, pthread_condattr_init) { 683 pthread_condattr_t attr; 684 pthread_condattr_init(&attr); 685 686 clockid_t clock; 687 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 688 ASSERT_EQ(CLOCK_REALTIME, clock); 689 690 int pshared; 691 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 692 ASSERT_EQ(PTHREAD_PROCESS_PRIVATE, pshared); 693} 694 695TEST(pthread, pthread_condattr_setclock) { 696 pthread_condattr_t attr; 697 pthread_condattr_init(&attr); 698 699 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_REALTIME)); 700 clockid_t clock; 701 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 702 ASSERT_EQ(CLOCK_REALTIME, clock); 703 704 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 705 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 706 ASSERT_EQ(CLOCK_MONOTONIC, clock); 707 708 ASSERT_EQ(EINVAL, pthread_condattr_setclock(&attr, CLOCK_PROCESS_CPUTIME_ID)); 709} 710 711TEST(pthread, pthread_cond_broadcast__preserves_condattr_flags) { 712#if defined(__BIONIC__) // This tests a bionic implementation detail. 713 pthread_condattr_t attr; 714 pthread_condattr_init(&attr); 715 716 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 717 ASSERT_EQ(0, pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED)); 718 719 pthread_cond_t cond_var; 720 ASSERT_EQ(0, pthread_cond_init(&cond_var, &attr)); 721 722 ASSERT_EQ(0, pthread_cond_signal(&cond_var)); 723 ASSERT_EQ(0, pthread_cond_broadcast(&cond_var)); 724 725 attr = static_cast<pthread_condattr_t>(cond_var.value); 726 clockid_t clock; 727 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 728 ASSERT_EQ(CLOCK_MONOTONIC, clock); 729 int pshared; 730 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 731 ASSERT_EQ(PTHREAD_PROCESS_SHARED, pshared); 732#else // __BIONIC__ 733 GTEST_LOG_(INFO) << "This test does nothing.\n"; 734#endif // __BIONIC__ 735} 736 737TEST(pthread, pthread_mutex_timedlock) { 738 pthread_mutex_t m; 739 ASSERT_EQ(0, pthread_mutex_init(&m, NULL)); 740 741 // If the mutex is already locked, pthread_mutex_timedlock should time out. 742 ASSERT_EQ(0, pthread_mutex_lock(&m)); 743 744 timespec ts; 745 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 746 ts.tv_nsec += 1; 747 ASSERT_EQ(ETIMEDOUT, pthread_mutex_timedlock(&m, &ts)); 748 749 // If the mutex is unlocked, pthread_mutex_timedlock should succeed. 750 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 751 752 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 753 ts.tv_nsec += 1; 754 ASSERT_EQ(0, pthread_mutex_timedlock(&m, &ts)); 755 756 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 757 ASSERT_EQ(0, pthread_mutex_destroy(&m)); 758} 759