pthread_test.cpp revision 18d93f2793fad393b6aa6eae6afe1054958339d5
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 85TEST(pthread, pthread_key_fork) { 86 void* expected = reinterpret_cast<void*>(1234); 87 pthread_key_t key; 88 ASSERT_EQ(0, pthread_key_create(&key, NULL)); 89 ASSERT_EQ(0, pthread_setspecific(key, expected)); 90 ASSERT_EQ(expected, pthread_getspecific(key)); 91 92 pid_t pid = fork(); 93 ASSERT_NE(-1, pid) << strerror(errno); 94 95 if (pid == 0) { 96 // The surviving thread inherits all the forking thread's TLS values... 97 ASSERT_EQ(expected, pthread_getspecific(key)); 98 _exit(99); 99 } 100 101 int status; 102 ASSERT_EQ(pid, waitpid(pid, &status, 0)); 103 ASSERT_TRUE(WIFEXITED(status)); 104 ASSERT_EQ(99, WEXITSTATUS(status)); 105 106 ASSERT_EQ(expected, pthread_getspecific(key)); 107} 108 109static void* DirtyKeyFn(void* key) { 110 return pthread_getspecific(*reinterpret_cast<pthread_key_t*>(key)); 111} 112 113TEST(pthread, pthread_key_dirty) { 114 pthread_key_t key; 115 ASSERT_EQ(0, pthread_key_create(&key, NULL)); 116 117 size_t stack_size = 128 * 1024; 118 void* stack = mmap(NULL, stack_size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); 119 ASSERT_NE(MAP_FAILED, stack); 120 memset(stack, 0xff, stack_size); 121 122 pthread_attr_t attr; 123 ASSERT_EQ(0, pthread_attr_init(&attr)); 124 ASSERT_EQ(0, pthread_attr_setstack(&attr, stack, stack_size)); 125 126 pthread_t t; 127 ASSERT_EQ(0, pthread_create(&t, &attr, DirtyKeyFn, &key)); 128 129 void* result; 130 ASSERT_EQ(0, pthread_join(t, &result)); 131 ASSERT_EQ(nullptr, result); // Not ~0! 132 133 ASSERT_EQ(0, munmap(stack, stack_size)); 134} 135 136static void* IdFn(void* arg) { 137 return arg; 138} 139 140static void* SleepFn(void* arg) { 141 sleep(reinterpret_cast<uintptr_t>(arg)); 142 return NULL; 143} 144 145static void* SpinFn(void* arg) { 146 volatile bool* b = reinterpret_cast<volatile bool*>(arg); 147 while (!*b) { 148 } 149 return NULL; 150} 151 152static void* JoinFn(void* arg) { 153 return reinterpret_cast<void*>(pthread_join(reinterpret_cast<pthread_t>(arg), NULL)); 154} 155 156static void AssertDetached(pthread_t t, bool is_detached) { 157 pthread_attr_t attr; 158 ASSERT_EQ(0, pthread_getattr_np(t, &attr)); 159 int detach_state; 160 ASSERT_EQ(0, pthread_attr_getdetachstate(&attr, &detach_state)); 161 pthread_attr_destroy(&attr); 162 ASSERT_EQ(is_detached, (detach_state == PTHREAD_CREATE_DETACHED)); 163} 164 165static void MakeDeadThread(pthread_t& t) { 166 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, NULL)); 167 void* result; 168 ASSERT_EQ(0, pthread_join(t, &result)); 169} 170 171TEST(pthread, pthread_create) { 172 void* expected_result = reinterpret_cast<void*>(123); 173 // Can we create a thread? 174 pthread_t t; 175 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, expected_result)); 176 // If we join, do we get the expected value back? 177 void* result; 178 ASSERT_EQ(0, pthread_join(t, &result)); 179 ASSERT_EQ(expected_result, result); 180} 181 182TEST(pthread, pthread_create_EAGAIN) { 183 pthread_attr_t attributes; 184 ASSERT_EQ(0, pthread_attr_init(&attributes)); 185 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, static_cast<size_t>(-1) & ~(getpagesize() - 1))); 186 187 pthread_t t; 188 ASSERT_EQ(EAGAIN, pthread_create(&t, &attributes, IdFn, NULL)); 189} 190 191TEST(pthread, pthread_no_join_after_detach) { 192 pthread_t t1; 193 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 194 195 // After a pthread_detach... 196 ASSERT_EQ(0, pthread_detach(t1)); 197 AssertDetached(t1, true); 198 199 // ...pthread_join should fail. 200 void* result; 201 ASSERT_EQ(EINVAL, pthread_join(t1, &result)); 202} 203 204TEST(pthread, pthread_no_op_detach_after_join) { 205 bool done = false; 206 207 pthread_t t1; 208 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 209 210 // If thread 2 is already waiting to join thread 1... 211 pthread_t t2; 212 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 213 214 sleep(1); // (Give t2 a chance to call pthread_join.) 215 216 // ...a call to pthread_detach on thread 1 will "succeed" (silently fail)... 217 ASSERT_EQ(0, pthread_detach(t1)); 218 AssertDetached(t1, false); 219 220 done = true; 221 222 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 223 void* join_result; 224 ASSERT_EQ(0, pthread_join(t2, &join_result)); 225 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 226} 227 228TEST(pthread, pthread_join_self) { 229 void* result; 230 ASSERT_EQ(EDEADLK, pthread_join(pthread_self(), &result)); 231} 232 233struct TestBug37410 { 234 pthread_t main_thread; 235 pthread_mutex_t mutex; 236 237 static void main() { 238 TestBug37410 data; 239 data.main_thread = pthread_self(); 240 ASSERT_EQ(0, pthread_mutex_init(&data.mutex, NULL)); 241 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 242 243 pthread_t t; 244 ASSERT_EQ(0, pthread_create(&t, NULL, TestBug37410::thread_fn, reinterpret_cast<void*>(&data))); 245 246 // Wait for the thread to be running... 247 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 248 ASSERT_EQ(0, pthread_mutex_unlock(&data.mutex)); 249 250 // ...and exit. 251 pthread_exit(NULL); 252 } 253 254 private: 255 static void* thread_fn(void* arg) { 256 TestBug37410* data = reinterpret_cast<TestBug37410*>(arg); 257 258 // Let the main thread know we're running. 259 pthread_mutex_unlock(&data->mutex); 260 261 // And wait for the main thread to exit. 262 pthread_join(data->main_thread, NULL); 263 264 return NULL; 265 } 266}; 267 268// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to 269// run this test (which exits normally) in its own process. 270TEST(pthread_DeathTest, pthread_bug_37410) { 271 // http://code.google.com/p/android/issues/detail?id=37410 272 ::testing::FLAGS_gtest_death_test_style = "threadsafe"; 273 ASSERT_EXIT(TestBug37410::main(), ::testing::ExitedWithCode(0), ""); 274} 275 276static void* SignalHandlerFn(void* arg) { 277 sigset_t wait_set; 278 sigfillset(&wait_set); 279 return reinterpret_cast<void*>(sigwait(&wait_set, reinterpret_cast<int*>(arg))); 280} 281 282TEST(pthread, pthread_sigmask) { 283 // Check that SIGUSR1 isn't blocked. 284 sigset_t original_set; 285 sigemptyset(&original_set); 286 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &original_set)); 287 ASSERT_FALSE(sigismember(&original_set, SIGUSR1)); 288 289 // Block SIGUSR1. 290 sigset_t set; 291 sigemptyset(&set); 292 sigaddset(&set, SIGUSR1); 293 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, &set, NULL)); 294 295 // Check that SIGUSR1 is blocked. 296 sigset_t final_set; 297 sigemptyset(&final_set); 298 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &final_set)); 299 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 300 // ...and that sigprocmask agrees with pthread_sigmask. 301 sigemptyset(&final_set); 302 ASSERT_EQ(0, sigprocmask(SIG_BLOCK, NULL, &final_set)); 303 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 304 305 // Spawn a thread that calls sigwait and tells us what it received. 306 pthread_t signal_thread; 307 int received_signal = -1; 308 ASSERT_EQ(0, pthread_create(&signal_thread, NULL, SignalHandlerFn, &received_signal)); 309 310 // Send that thread SIGUSR1. 311 pthread_kill(signal_thread, SIGUSR1); 312 313 // See what it got. 314 void* join_result; 315 ASSERT_EQ(0, pthread_join(signal_thread, &join_result)); 316 ASSERT_EQ(SIGUSR1, received_signal); 317 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 318 319 // Restore the original signal mask. 320 ASSERT_EQ(0, pthread_sigmask(SIG_SETMASK, &original_set, NULL)); 321} 322 323TEST(pthread, pthread_setname_np__too_long) { 324#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 325 ASSERT_EQ(ERANGE, pthread_setname_np(pthread_self(), "this name is far too long for linux")); 326#else // __BIONIC__ 327 GTEST_LOG_(INFO) << "This test does nothing.\n"; 328#endif // __BIONIC__ 329} 330 331TEST(pthread, pthread_setname_np__self) { 332#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 333 ASSERT_EQ(0, pthread_setname_np(pthread_self(), "short 1")); 334#else // __BIONIC__ 335 GTEST_LOG_(INFO) << "This test does nothing.\n"; 336#endif // __BIONIC__ 337} 338 339TEST(pthread, pthread_setname_np__other) { 340#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 341 // Emulator kernels don't currently support setting the name of other threads. 342 char* filename = NULL; 343 asprintf(&filename, "/proc/self/task/%d/comm", gettid()); 344 struct stat sb; 345 bool has_comm = (stat(filename, &sb) != -1); 346 free(filename); 347 348 if (has_comm) { 349 pthread_t t1; 350 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 351 ASSERT_EQ(0, pthread_setname_np(t1, "short 2")); 352 } else { 353 fprintf(stderr, "skipping test: this kernel doesn't have /proc/self/task/tid/comm files!\n"); 354 } 355#else // __BIONIC__ 356 GTEST_LOG_(INFO) << "This test does nothing.\n"; 357#endif // __BIONIC__ 358} 359 360TEST(pthread, pthread_setname_np__no_such_thread) { 361#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 362 pthread_t dead_thread; 363 MakeDeadThread(dead_thread); 364 365 // Call pthread_setname_np after thread has already exited. 366 ASSERT_EQ(ESRCH, pthread_setname_np(dead_thread, "short 3")); 367#else // __BIONIC__ 368 GTEST_LOG_(INFO) << "This test does nothing.\n"; 369#endif // __BIONIC__ 370} 371 372TEST(pthread, pthread_kill__0) { 373 // Signal 0 just tests that the thread exists, so it's safe to call on ourselves. 374 ASSERT_EQ(0, pthread_kill(pthread_self(), 0)); 375} 376 377TEST(pthread, pthread_kill__invalid_signal) { 378 ASSERT_EQ(EINVAL, pthread_kill(pthread_self(), -1)); 379} 380 381static void pthread_kill__in_signal_handler_helper(int signal_number) { 382 static int count = 0; 383 ASSERT_EQ(SIGALRM, signal_number); 384 if (++count == 1) { 385 // Can we call pthread_kill from a signal handler? 386 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 387 } 388} 389 390TEST(pthread, pthread_kill__in_signal_handler) { 391 ScopedSignalHandler ssh(SIGALRM, pthread_kill__in_signal_handler_helper); 392 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 393} 394 395TEST(pthread, pthread_detach__no_such_thread) { 396 pthread_t dead_thread; 397 MakeDeadThread(dead_thread); 398 399 ASSERT_EQ(ESRCH, pthread_detach(dead_thread)); 400} 401 402TEST(pthread, pthread_detach__leak) { 403 size_t initial_bytes = 0; 404 // Run this loop more than once since the first loop causes some memory 405 // to be allocated permenantly. Run an extra loop to help catch any subtle 406 // memory leaks. 407 for (size_t loop = 0; loop < 3; loop++) { 408 // Set the initial bytes on the second loop since the memory in use 409 // should have stabilized. 410 if (loop == 1) { 411 initial_bytes = mallinfo().uordblks; 412 } 413 414 pthread_attr_t attr; 415 ASSERT_EQ(0, pthread_attr_init(&attr)); 416 ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE)); 417 418 std::vector<pthread_t> threads; 419 for (size_t i = 0; i < 32; ++i) { 420 pthread_t t; 421 ASSERT_EQ(0, pthread_create(&t, &attr, IdFn, NULL)); 422 threads.push_back(t); 423 } 424 425 sleep(1); 426 427 for (size_t i = 0; i < 32; ++i) { 428 ASSERT_EQ(0, pthread_detach(threads[i])) << i; 429 } 430 } 431 432 size_t final_bytes = mallinfo().uordblks; 433 int leaked_bytes = (final_bytes - initial_bytes); 434 435 // User code (like this test) doesn't know how large pthread_internal_t is. 436 // We can be pretty sure it's more than 128 bytes. 437 ASSERT_LT(leaked_bytes, 32 /*threads*/ * 128 /*bytes*/); 438} 439 440TEST(pthread, pthread_getcpuclockid__clock_gettime) { 441 pthread_t t; 442 ASSERT_EQ(0, pthread_create(&t, NULL, SleepFn, reinterpret_cast<void*>(5))); 443 444 clockid_t c; 445 ASSERT_EQ(0, pthread_getcpuclockid(t, &c)); 446 timespec ts; 447 ASSERT_EQ(0, clock_gettime(c, &ts)); 448} 449 450TEST(pthread, pthread_getcpuclockid__no_such_thread) { 451 pthread_t dead_thread; 452 MakeDeadThread(dead_thread); 453 454 clockid_t c; 455 ASSERT_EQ(ESRCH, pthread_getcpuclockid(dead_thread, &c)); 456} 457 458TEST(pthread, pthread_getschedparam__no_such_thread) { 459 pthread_t dead_thread; 460 MakeDeadThread(dead_thread); 461 462 int policy; 463 sched_param param; 464 ASSERT_EQ(ESRCH, pthread_getschedparam(dead_thread, &policy, ¶m)); 465} 466 467TEST(pthread, pthread_setschedparam__no_such_thread) { 468 pthread_t dead_thread; 469 MakeDeadThread(dead_thread); 470 471 int policy = 0; 472 sched_param param; 473 ASSERT_EQ(ESRCH, pthread_setschedparam(dead_thread, policy, ¶m)); 474} 475 476TEST(pthread, pthread_join__no_such_thread) { 477 pthread_t dead_thread; 478 MakeDeadThread(dead_thread); 479 480 void* result; 481 ASSERT_EQ(ESRCH, pthread_join(dead_thread, &result)); 482} 483 484TEST(pthread, pthread_kill__no_such_thread) { 485 pthread_t dead_thread; 486 MakeDeadThread(dead_thread); 487 488 ASSERT_EQ(ESRCH, pthread_kill(dead_thread, 0)); 489} 490 491TEST(pthread, pthread_join__multijoin) { 492 bool done = false; 493 494 pthread_t t1; 495 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 496 497 pthread_t t2; 498 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 499 500 sleep(1); // (Give t2 a chance to call pthread_join.) 501 502 // Multiple joins to the same thread should fail. 503 ASSERT_EQ(EINVAL, pthread_join(t1, NULL)); 504 505 done = true; 506 507 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 508 void* join_result; 509 ASSERT_EQ(0, pthread_join(t2, &join_result)); 510 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 511} 512 513TEST(pthread, pthread_join__race) { 514 // http://b/11693195 --- pthread_join could return before the thread had actually exited. 515 // If the joiner unmapped the thread's stack, that could lead to SIGSEGV in the thread. 516 for (size_t i = 0; i < 1024; ++i) { 517 size_t stack_size = 64*1024; 518 void* stack = mmap(NULL, stack_size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); 519 520 pthread_attr_t a; 521 pthread_attr_init(&a); 522 pthread_attr_setstack(&a, stack, stack_size); 523 524 pthread_t t; 525 ASSERT_EQ(0, pthread_create(&t, &a, IdFn, NULL)); 526 ASSERT_EQ(0, pthread_join(t, NULL)); 527 ASSERT_EQ(0, munmap(stack, stack_size)); 528 } 529} 530 531static void* GetActualGuardSizeFn(void* arg) { 532 pthread_attr_t attributes; 533 pthread_getattr_np(pthread_self(), &attributes); 534 pthread_attr_getguardsize(&attributes, reinterpret_cast<size_t*>(arg)); 535 return NULL; 536} 537 538static size_t GetActualGuardSize(const pthread_attr_t& attributes) { 539 size_t result; 540 pthread_t t; 541 pthread_create(&t, &attributes, GetActualGuardSizeFn, &result); 542 void* join_result; 543 pthread_join(t, &join_result); 544 return result; 545} 546 547static void* GetActualStackSizeFn(void* arg) { 548 pthread_attr_t attributes; 549 pthread_getattr_np(pthread_self(), &attributes); 550 pthread_attr_getstacksize(&attributes, reinterpret_cast<size_t*>(arg)); 551 return NULL; 552} 553 554static size_t GetActualStackSize(const pthread_attr_t& attributes) { 555 size_t result; 556 pthread_t t; 557 pthread_create(&t, &attributes, GetActualStackSizeFn, &result); 558 void* join_result; 559 pthread_join(t, &join_result); 560 return result; 561} 562 563TEST(pthread, pthread_attr_setguardsize) { 564 pthread_attr_t attributes; 565 ASSERT_EQ(0, pthread_attr_init(&attributes)); 566 567 // Get the default guard size. 568 size_t default_guard_size; 569 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &default_guard_size)); 570 571 // No such thing as too small: will be rounded up to one page by pthread_create. 572 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 128)); 573 size_t guard_size; 574 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 575 ASSERT_EQ(128U, guard_size); 576 ASSERT_EQ(4096U, GetActualGuardSize(attributes)); 577 578 // Large enough and a multiple of the page size. 579 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024)); 580 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 581 ASSERT_EQ(32*1024U, guard_size); 582 583 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 584 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024 + 1)); 585 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 586 ASSERT_EQ(32*1024U + 1, guard_size); 587} 588 589TEST(pthread, pthread_attr_setstacksize) { 590 pthread_attr_t attributes; 591 ASSERT_EQ(0, pthread_attr_init(&attributes)); 592 593 // Get the default stack size. 594 size_t default_stack_size; 595 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &default_stack_size)); 596 597 // Too small. 598 ASSERT_EQ(EINVAL, pthread_attr_setstacksize(&attributes, 128)); 599 size_t stack_size; 600 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 601 ASSERT_EQ(default_stack_size, stack_size); 602 ASSERT_GE(GetActualStackSize(attributes), default_stack_size); 603 604 // Large enough and a multiple of the page size. 605 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024)); 606 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 607 ASSERT_EQ(32*1024U, stack_size); 608 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 609 610 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 611 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024 + 1)); 612 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 613 ASSERT_EQ(32*1024U + 1, stack_size); 614#if defined(__BIONIC__) 615 // Bionic rounds up, which is what POSIX allows. 616 ASSERT_EQ(GetActualStackSize(attributes), (32 + 4)*1024U); 617#else // __BIONIC__ 618 // glibc rounds down, in violation of POSIX. They document this in their BUGS section. 619 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 620#endif // __BIONIC__ 621} 622 623TEST(pthread, pthread_rwlock_smoke) { 624 pthread_rwlock_t l; 625 ASSERT_EQ(0, pthread_rwlock_init(&l, NULL)); 626 627 // Single read lock 628 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 629 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 630 631 // Multiple read lock 632 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 633 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 634 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 635 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 636 637 // Write lock 638 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 639 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 640 641 // Try writer lock 642 ASSERT_EQ(0, pthread_rwlock_trywrlock(&l)); 643 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 644 ASSERT_EQ(EBUSY, pthread_rwlock_tryrdlock(&l)); 645 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 646 647 // Try reader lock 648 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 649 ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l)); 650 ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l)); 651 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 652 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 653 654 // Try writer lock after unlock 655 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 656 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 657 658#ifdef __BIONIC__ 659 // EDEADLK in "read after write" 660 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 661 ASSERT_EQ(EDEADLK, pthread_rwlock_rdlock(&l)); 662 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 663 664 // EDEADLK in "write after write" 665 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 666 ASSERT_EQ(EDEADLK, pthread_rwlock_wrlock(&l)); 667 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 668#endif 669 670 ASSERT_EQ(0, pthread_rwlock_destroy(&l)); 671} 672 673static int g_once_fn_call_count = 0; 674static void OnceFn() { 675 ++g_once_fn_call_count; 676} 677 678TEST(pthread, pthread_once_smoke) { 679 pthread_once_t once_control = PTHREAD_ONCE_INIT; 680 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 681 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 682 ASSERT_EQ(1, g_once_fn_call_count); 683} 684 685static std::string pthread_once_1934122_result = ""; 686 687static void Routine2() { 688 pthread_once_1934122_result += "2"; 689} 690 691static void Routine1() { 692 pthread_once_t once_control_2 = PTHREAD_ONCE_INIT; 693 pthread_once_1934122_result += "1"; 694 pthread_once(&once_control_2, &Routine2); 695} 696 697TEST(pthread, pthread_once_1934122) { 698 // Very old versions of Android couldn't call pthread_once from a 699 // pthread_once init routine. http://b/1934122. 700 pthread_once_t once_control_1 = PTHREAD_ONCE_INIT; 701 ASSERT_EQ(0, pthread_once(&once_control_1, &Routine1)); 702 ASSERT_EQ("12", pthread_once_1934122_result); 703} 704 705static int g_atfork_prepare_calls = 0; 706static void AtForkPrepare1() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 1; } 707static void AtForkPrepare2() { g_atfork_prepare_calls = (g_atfork_prepare_calls << 4) | 2; } 708static int g_atfork_parent_calls = 0; 709static void AtForkParent1() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 1; } 710static void AtForkParent2() { g_atfork_parent_calls = (g_atfork_parent_calls << 4) | 2; } 711static int g_atfork_child_calls = 0; 712static void AtForkChild1() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 1; } 713static void AtForkChild2() { g_atfork_child_calls = (g_atfork_child_calls << 4) | 2; } 714 715TEST(pthread, pthread_atfork) { 716 ASSERT_EQ(0, pthread_atfork(AtForkPrepare1, AtForkParent1, AtForkChild1)); 717 ASSERT_EQ(0, pthread_atfork(AtForkPrepare2, AtForkParent2, AtForkChild2)); 718 719 int pid = fork(); 720 ASSERT_NE(-1, pid) << strerror(errno); 721 722 // Child and parent calls are made in the order they were registered. 723 if (pid == 0) { 724 ASSERT_EQ(0x12, g_atfork_child_calls); 725 _exit(0); 726 } 727 ASSERT_EQ(0x12, g_atfork_parent_calls); 728 729 // Prepare calls are made in the reverse order. 730 ASSERT_EQ(0x21, g_atfork_prepare_calls); 731} 732 733TEST(pthread, pthread_attr_getscope) { 734 pthread_attr_t attr; 735 ASSERT_EQ(0, pthread_attr_init(&attr)); 736 737 int scope; 738 ASSERT_EQ(0, pthread_attr_getscope(&attr, &scope)); 739 ASSERT_EQ(PTHREAD_SCOPE_SYSTEM, scope); 740} 741 742TEST(pthread, pthread_condattr_init) { 743 pthread_condattr_t attr; 744 pthread_condattr_init(&attr); 745 746 clockid_t clock; 747 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 748 ASSERT_EQ(CLOCK_REALTIME, clock); 749 750 int pshared; 751 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 752 ASSERT_EQ(PTHREAD_PROCESS_PRIVATE, pshared); 753} 754 755TEST(pthread, pthread_condattr_setclock) { 756 pthread_condattr_t attr; 757 pthread_condattr_init(&attr); 758 759 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_REALTIME)); 760 clockid_t clock; 761 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 762 ASSERT_EQ(CLOCK_REALTIME, clock); 763 764 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 765 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 766 ASSERT_EQ(CLOCK_MONOTONIC, clock); 767 768 ASSERT_EQ(EINVAL, pthread_condattr_setclock(&attr, CLOCK_PROCESS_CPUTIME_ID)); 769} 770 771TEST(pthread, pthread_cond_broadcast__preserves_condattr_flags) { 772#if defined(__BIONIC__) // This tests a bionic implementation detail. 773 pthread_condattr_t attr; 774 pthread_condattr_init(&attr); 775 776 ASSERT_EQ(0, pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)); 777 ASSERT_EQ(0, pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED)); 778 779 pthread_cond_t cond_var; 780 ASSERT_EQ(0, pthread_cond_init(&cond_var, &attr)); 781 782 ASSERT_EQ(0, pthread_cond_signal(&cond_var)); 783 ASSERT_EQ(0, pthread_cond_broadcast(&cond_var)); 784 785 attr = static_cast<pthread_condattr_t>(cond_var.value); 786 clockid_t clock; 787 ASSERT_EQ(0, pthread_condattr_getclock(&attr, &clock)); 788 ASSERT_EQ(CLOCK_MONOTONIC, clock); 789 int pshared; 790 ASSERT_EQ(0, pthread_condattr_getpshared(&attr, &pshared)); 791 ASSERT_EQ(PTHREAD_PROCESS_SHARED, pshared); 792#else // __BIONIC__ 793 GTEST_LOG_(INFO) << "This test does nothing.\n"; 794#endif // __BIONIC__ 795} 796 797TEST(pthread, pthread_mutex_timedlock) { 798 pthread_mutex_t m; 799 ASSERT_EQ(0, pthread_mutex_init(&m, NULL)); 800 801 // If the mutex is already locked, pthread_mutex_timedlock should time out. 802 ASSERT_EQ(0, pthread_mutex_lock(&m)); 803 804 timespec ts; 805 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 806 ts.tv_nsec += 1; 807 ASSERT_EQ(ETIMEDOUT, pthread_mutex_timedlock(&m, &ts)); 808 809 // If the mutex is unlocked, pthread_mutex_timedlock should succeed. 810 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 811 812 ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); 813 ts.tv_nsec += 1; 814 ASSERT_EQ(0, pthread_mutex_timedlock(&m, &ts)); 815 816 ASSERT_EQ(0, pthread_mutex_unlock(&m)); 817 ASSERT_EQ(0, pthread_mutex_destroy(&m)); 818} 819