pthread_test.cpp revision f04935c85e0b466f0d30d2cd4c0fa2fff62e7d6d
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 <pthread.h> 23#include <signal.h> 24#include <sys/mman.h> 25#include <unistd.h> 26 27TEST(pthread, pthread_key_create) { 28 pthread_key_t key; 29 ASSERT_EQ(0, pthread_key_create(&key, NULL)); 30 ASSERT_EQ(0, pthread_key_delete(key)); 31 // Can't delete a key that's already been deleted. 32 ASSERT_EQ(EINVAL, pthread_key_delete(key)); 33} 34 35TEST(pthread, pthread_key_create_lots) { 36#if defined(__BIONIC__) // glibc uses keys internally that its sysconf value doesn't account for. 37 // POSIX says PTHREAD_KEYS_MAX should be at least 128. 38 ASSERT_GE(PTHREAD_KEYS_MAX, 128); 39 40 int sysconf_max = sysconf(_SC_THREAD_KEYS_MAX); 41 42 // sysconf shouldn't return a smaller value. 43 ASSERT_GE(sysconf_max, PTHREAD_KEYS_MAX); 44 45 // We can allocate _SC_THREAD_KEYS_MAX keys. 46 sysconf_max -= 2; // (Except that gtest takes two for itself.) 47 std::vector<pthread_key_t> keys; 48 for (int i = 0; i < sysconf_max; ++i) { 49 pthread_key_t key; 50 // If this fails, it's likely that GLOBAL_INIT_THREAD_LOCAL_BUFFER_COUNT is wrong. 51 ASSERT_EQ(0, pthread_key_create(&key, NULL)) << i << " of " << sysconf_max; 52 keys.push_back(key); 53 } 54 55 // ...and that really is the maximum. 56 pthread_key_t key; 57 ASSERT_EQ(EAGAIN, pthread_key_create(&key, NULL)); 58 59 // (Don't leak all those keys!) 60 for (size_t i = 0; i < keys.size(); ++i) { 61 ASSERT_EQ(0, pthread_key_delete(keys[i])); 62 } 63#else // __BIONIC__ 64 GTEST_LOG_(INFO) << "This test does nothing.\n"; 65#endif // __BIONIC__ 66} 67 68static void* IdFn(void* arg) { 69 return arg; 70} 71 72static void* SleepFn(void* arg) { 73 sleep(reinterpret_cast<uintptr_t>(arg)); 74 return NULL; 75} 76 77static void* SpinFn(void* arg) { 78 volatile bool* b = reinterpret_cast<volatile bool*>(arg); 79 while (!*b) { 80 } 81 return NULL; 82} 83 84static void* JoinFn(void* arg) { 85 return reinterpret_cast<void*>(pthread_join(reinterpret_cast<pthread_t>(arg), NULL)); 86} 87 88static void AssertDetached(pthread_t t, bool is_detached) { 89 pthread_attr_t attr; 90 ASSERT_EQ(0, pthread_getattr_np(t, &attr)); 91 int detach_state; 92 ASSERT_EQ(0, pthread_attr_getdetachstate(&attr, &detach_state)); 93 pthread_attr_destroy(&attr); 94 ASSERT_EQ(is_detached, (detach_state == PTHREAD_CREATE_DETACHED)); 95} 96 97static void MakeDeadThread(pthread_t& t) { 98 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, NULL)); 99 void* result; 100 ASSERT_EQ(0, pthread_join(t, &result)); 101} 102 103TEST(pthread, pthread_create) { 104 void* expected_result = reinterpret_cast<void*>(123); 105 // Can we create a thread? 106 pthread_t t; 107 ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, expected_result)); 108 // If we join, do we get the expected value back? 109 void* result; 110 ASSERT_EQ(0, pthread_join(t, &result)); 111 ASSERT_EQ(expected_result, result); 112} 113 114TEST(pthread, pthread_create_EAGAIN) { 115 pthread_attr_t attributes; 116 ASSERT_EQ(0, pthread_attr_init(&attributes)); 117 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, static_cast<size_t>(-1) & ~(getpagesize() - 1))); 118 119 pthread_t t; 120 ASSERT_EQ(EAGAIN, pthread_create(&t, &attributes, IdFn, NULL)); 121} 122 123TEST(pthread, pthread_no_join_after_detach) { 124 pthread_t t1; 125 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 126 127 // After a pthread_detach... 128 ASSERT_EQ(0, pthread_detach(t1)); 129 AssertDetached(t1, true); 130 131 // ...pthread_join should fail. 132 void* result; 133 ASSERT_EQ(EINVAL, pthread_join(t1, &result)); 134} 135 136TEST(pthread, pthread_no_op_detach_after_join) { 137 bool done = false; 138 139 pthread_t t1; 140 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 141 142 // If thread 2 is already waiting to join thread 1... 143 pthread_t t2; 144 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 145 146 sleep(1); // (Give t2 a chance to call pthread_join.) 147 148 // ...a call to pthread_detach on thread 1 will "succeed" (silently fail)... 149 ASSERT_EQ(0, pthread_detach(t1)); 150 AssertDetached(t1, false); 151 152 done = true; 153 154 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 155 void* join_result; 156 ASSERT_EQ(0, pthread_join(t2, &join_result)); 157 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 158} 159 160TEST(pthread, pthread_join_self) { 161 void* result; 162 ASSERT_EQ(EDEADLK, pthread_join(pthread_self(), &result)); 163} 164 165struct TestBug37410 { 166 pthread_t main_thread; 167 pthread_mutex_t mutex; 168 169 static void main() { 170 TestBug37410 data; 171 data.main_thread = pthread_self(); 172 ASSERT_EQ(0, pthread_mutex_init(&data.mutex, NULL)); 173 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 174 175 pthread_t t; 176 ASSERT_EQ(0, pthread_create(&t, NULL, TestBug37410::thread_fn, reinterpret_cast<void*>(&data))); 177 178 // Wait for the thread to be running... 179 ASSERT_EQ(0, pthread_mutex_lock(&data.mutex)); 180 ASSERT_EQ(0, pthread_mutex_unlock(&data.mutex)); 181 182 // ...and exit. 183 pthread_exit(NULL); 184 } 185 186 private: 187 static void* thread_fn(void* arg) { 188 TestBug37410* data = reinterpret_cast<TestBug37410*>(arg); 189 190 // Let the main thread know we're running. 191 pthread_mutex_unlock(&data->mutex); 192 193 // And wait for the main thread to exit. 194 pthread_join(data->main_thread, NULL); 195 196 return NULL; 197 } 198}; 199 200// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to 201// run this test (which exits normally) in its own process. 202TEST(pthread_DeathTest, pthread_bug_37410) { 203 // http://code.google.com/p/android/issues/detail?id=37410 204 ::testing::FLAGS_gtest_death_test_style = "threadsafe"; 205 ASSERT_EXIT(TestBug37410::main(), ::testing::ExitedWithCode(0), ""); 206} 207 208static void* SignalHandlerFn(void* arg) { 209 sigset_t wait_set; 210 sigfillset(&wait_set); 211 return reinterpret_cast<void*>(sigwait(&wait_set, reinterpret_cast<int*>(arg))); 212} 213 214TEST(pthread, pthread_sigmask) { 215 // Check that SIGUSR1 isn't blocked. 216 sigset_t original_set; 217 sigemptyset(&original_set); 218 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &original_set)); 219 ASSERT_FALSE(sigismember(&original_set, SIGUSR1)); 220 221 // Block SIGUSR1. 222 sigset_t set; 223 sigemptyset(&set); 224 sigaddset(&set, SIGUSR1); 225 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, &set, NULL)); 226 227 // Check that SIGUSR1 is blocked. 228 sigset_t final_set; 229 sigemptyset(&final_set); 230 ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, NULL, &final_set)); 231 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 232 // ...and that sigprocmask agrees with pthread_sigmask. 233 sigemptyset(&final_set); 234 ASSERT_EQ(0, sigprocmask(SIG_BLOCK, NULL, &final_set)); 235 ASSERT_TRUE(sigismember(&final_set, SIGUSR1)); 236 237 // Spawn a thread that calls sigwait and tells us what it received. 238 pthread_t signal_thread; 239 int received_signal = -1; 240 ASSERT_EQ(0, pthread_create(&signal_thread, NULL, SignalHandlerFn, &received_signal)); 241 242 // Send that thread SIGUSR1. 243 pthread_kill(signal_thread, SIGUSR1); 244 245 // See what it got. 246 void* join_result; 247 ASSERT_EQ(0, pthread_join(signal_thread, &join_result)); 248 ASSERT_EQ(SIGUSR1, received_signal); 249 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 250 251 // Restore the original signal mask. 252 ASSERT_EQ(0, pthread_sigmask(SIG_SETMASK, &original_set, NULL)); 253} 254 255#if defined(__BIONIC__) 256extern "C" pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg); 257#endif // __BIONIC__ 258 259TEST(pthread, __bionic_clone) { 260#if defined(__BIONIC__) 261 // Check that our hand-written clone assembler sets errno correctly on failure. 262 uintptr_t fake_child_stack[16]; 263 errno = 0; 264 ASSERT_EQ(-1, __bionic_clone(CLONE_THREAD, &fake_child_stack[16], NULL, NULL, NULL, NULL, NULL)); 265 ASSERT_EQ(EINVAL, errno); 266#else // __BIONIC__ 267 GTEST_LOG_(INFO) << "This test does nothing.\n"; 268#endif // __BIONIC__ 269} 270 271TEST(pthread, pthread_setname_np__too_long) { 272#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 273 ASSERT_EQ(ERANGE, pthread_setname_np(pthread_self(), "this name is far too long for linux")); 274#else // __BIONIC__ 275 GTEST_LOG_(INFO) << "This test does nothing.\n"; 276#endif // __BIONIC__ 277} 278 279TEST(pthread, pthread_setname_np__self) { 280#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 281 ASSERT_EQ(0, pthread_setname_np(pthread_self(), "short 1")); 282#else // __BIONIC__ 283 GTEST_LOG_(INFO) << "This test does nothing.\n"; 284#endif // __BIONIC__ 285} 286 287TEST(pthread, pthread_setname_np__other) { 288#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 289 // Emulator kernels don't currently support setting the name of other threads. 290 char* filename = NULL; 291 asprintf(&filename, "/proc/self/task/%d/comm", gettid()); 292 struct stat sb; 293 bool has_comm = (stat(filename, &sb) != -1); 294 free(filename); 295 296 if (has_comm) { 297 pthread_t t1; 298 ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5))); 299 ASSERT_EQ(0, pthread_setname_np(t1, "short 2")); 300 } else { 301 fprintf(stderr, "skipping test: this kernel doesn't have /proc/self/task/tid/comm files!\n"); 302 } 303#else // __BIONIC__ 304 GTEST_LOG_(INFO) << "This test does nothing.\n"; 305#endif // __BIONIC__ 306} 307 308TEST(pthread, pthread_setname_np__no_such_thread) { 309#if defined(__BIONIC__) // Not all build servers have a new enough glibc? TODO: remove when they're on gprecise. 310 pthread_t dead_thread; 311 MakeDeadThread(dead_thread); 312 313 // Call pthread_setname_np after thread has already exited. 314 ASSERT_EQ(ESRCH, pthread_setname_np(dead_thread, "short 3")); 315#else // __BIONIC__ 316 GTEST_LOG_(INFO) << "This test does nothing.\n"; 317#endif // __BIONIC__ 318} 319 320TEST(pthread, pthread_kill__0) { 321 // Signal 0 just tests that the thread exists, so it's safe to call on ourselves. 322 ASSERT_EQ(0, pthread_kill(pthread_self(), 0)); 323} 324 325TEST(pthread, pthread_kill__invalid_signal) { 326 ASSERT_EQ(EINVAL, pthread_kill(pthread_self(), -1)); 327} 328 329static void pthread_kill__in_signal_handler_helper(int signal_number) { 330 static int count = 0; 331 ASSERT_EQ(SIGALRM, signal_number); 332 if (++count == 1) { 333 // Can we call pthread_kill from a signal handler? 334 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 335 } 336} 337 338TEST(pthread, pthread_kill__in_signal_handler) { 339 struct sigaction action; 340 struct sigaction original_action; 341 sigemptyset(&action.sa_mask); 342 action.sa_flags = 0; 343 action.sa_handler = pthread_kill__in_signal_handler_helper; 344 ASSERT_EQ(0, sigaction(SIGALRM, &action, &original_action)); 345 ASSERT_EQ(0, pthread_kill(pthread_self(), SIGALRM)); 346 ASSERT_EQ(0, sigaction(SIGALRM, &original_action, NULL)); 347} 348 349TEST(pthread, pthread_detach__no_such_thread) { 350 pthread_t dead_thread; 351 MakeDeadThread(dead_thread); 352 353 ASSERT_EQ(ESRCH, pthread_detach(dead_thread)); 354} 355 356TEST(pthread, pthread_getcpuclockid__clock_gettime) { 357 pthread_t t; 358 ASSERT_EQ(0, pthread_create(&t, NULL, SleepFn, reinterpret_cast<void*>(5))); 359 360 clockid_t c; 361 ASSERT_EQ(0, pthread_getcpuclockid(t, &c)); 362 timespec ts; 363 ASSERT_EQ(0, clock_gettime(c, &ts)); 364} 365 366TEST(pthread, pthread_getcpuclockid__no_such_thread) { 367 pthread_t dead_thread; 368 MakeDeadThread(dead_thread); 369 370 clockid_t c; 371 ASSERT_EQ(ESRCH, pthread_getcpuclockid(dead_thread, &c)); 372} 373 374TEST(pthread, pthread_getschedparam__no_such_thread) { 375 pthread_t dead_thread; 376 MakeDeadThread(dead_thread); 377 378 int policy; 379 sched_param param; 380 ASSERT_EQ(ESRCH, pthread_getschedparam(dead_thread, &policy, ¶m)); 381} 382 383TEST(pthread, pthread_setschedparam__no_such_thread) { 384 pthread_t dead_thread; 385 MakeDeadThread(dead_thread); 386 387 int policy = 0; 388 sched_param param; 389 ASSERT_EQ(ESRCH, pthread_setschedparam(dead_thread, policy, ¶m)); 390} 391 392TEST(pthread, pthread_join__no_such_thread) { 393 pthread_t dead_thread; 394 MakeDeadThread(dead_thread); 395 396 void* result; 397 ASSERT_EQ(ESRCH, pthread_join(dead_thread, &result)); 398} 399 400TEST(pthread, pthread_kill__no_such_thread) { 401 pthread_t dead_thread; 402 MakeDeadThread(dead_thread); 403 404 ASSERT_EQ(ESRCH, pthread_kill(dead_thread, 0)); 405} 406 407TEST(pthread, pthread_join__multijoin) { 408 bool done = false; 409 410 pthread_t t1; 411 ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done)); 412 413 pthread_t t2; 414 ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1))); 415 416 sleep(1); // (Give t2 a chance to call pthread_join.) 417 418 // Multiple joins to the same thread should fail. 419 ASSERT_EQ(EINVAL, pthread_join(t1, NULL)); 420 421 done = true; 422 423 // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes). 424 void* join_result; 425 ASSERT_EQ(0, pthread_join(t2, &join_result)); 426 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(join_result)); 427} 428 429TEST(pthread, pthread_join__race) { 430 // http://b/11693195 --- pthread_join could return before the thread had actually exited. 431 // If the joiner unmapped the thread's stack, that could lead to SIGSEGV in the thread. 432 for (size_t i = 0; i < 1024; ++i) { 433 size_t stack_size = 64*1024; 434 void* stack = mmap(NULL, stack_size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); 435 436 pthread_attr_t a; 437 pthread_attr_init(&a); 438 pthread_attr_setstack(&a, stack, stack_size); 439 440 pthread_t t; 441 ASSERT_EQ(0, pthread_create(&t, &a, IdFn, NULL)); 442 ASSERT_EQ(0, pthread_join(t, NULL)); 443 ASSERT_EQ(0, munmap(stack, stack_size)); 444 } 445} 446 447static void* GetActualGuardSizeFn(void* arg) { 448 pthread_attr_t attributes; 449 pthread_getattr_np(pthread_self(), &attributes); 450 pthread_attr_getguardsize(&attributes, reinterpret_cast<size_t*>(arg)); 451 return NULL; 452} 453 454static size_t GetActualGuardSize(const pthread_attr_t& attributes) { 455 size_t result; 456 pthread_t t; 457 pthread_create(&t, &attributes, GetActualGuardSizeFn, &result); 458 void* join_result; 459 pthread_join(t, &join_result); 460 return result; 461} 462 463static void* GetActualStackSizeFn(void* arg) { 464 pthread_attr_t attributes; 465 pthread_getattr_np(pthread_self(), &attributes); 466 pthread_attr_getstacksize(&attributes, reinterpret_cast<size_t*>(arg)); 467 return NULL; 468} 469 470static size_t GetActualStackSize(const pthread_attr_t& attributes) { 471 size_t result; 472 pthread_t t; 473 pthread_create(&t, &attributes, GetActualStackSizeFn, &result); 474 void* join_result; 475 pthread_join(t, &join_result); 476 return result; 477} 478 479TEST(pthread, pthread_attr_setguardsize) { 480 pthread_attr_t attributes; 481 ASSERT_EQ(0, pthread_attr_init(&attributes)); 482 483 // Get the default guard size. 484 size_t default_guard_size; 485 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &default_guard_size)); 486 487 // No such thing as too small: will be rounded up to one page by pthread_create. 488 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 128)); 489 size_t guard_size; 490 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 491 ASSERT_EQ(128U, guard_size); 492 ASSERT_EQ(4096U, GetActualGuardSize(attributes)); 493 494 // Large enough and a multiple of the page size. 495 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024)); 496 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 497 ASSERT_EQ(32*1024U, guard_size); 498 499 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 500 ASSERT_EQ(0, pthread_attr_setguardsize(&attributes, 32*1024 + 1)); 501 ASSERT_EQ(0, pthread_attr_getguardsize(&attributes, &guard_size)); 502 ASSERT_EQ(32*1024U + 1, guard_size); 503} 504 505TEST(pthread, pthread_attr_setstacksize) { 506 pthread_attr_t attributes; 507 ASSERT_EQ(0, pthread_attr_init(&attributes)); 508 509 // Get the default stack size. 510 size_t default_stack_size; 511 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &default_stack_size)); 512 513 // Too small. 514 ASSERT_EQ(EINVAL, pthread_attr_setstacksize(&attributes, 128)); 515 size_t stack_size; 516 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 517 ASSERT_EQ(default_stack_size, stack_size); 518 ASSERT_GE(GetActualStackSize(attributes), default_stack_size); 519 520 // Large enough and a multiple of the page size. 521 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024)); 522 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 523 ASSERT_EQ(32*1024U, stack_size); 524 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 525 526 // Large enough but not a multiple of the page size; will be rounded up by pthread_create. 527 ASSERT_EQ(0, pthread_attr_setstacksize(&attributes, 32*1024 + 1)); 528 ASSERT_EQ(0, pthread_attr_getstacksize(&attributes, &stack_size)); 529 ASSERT_EQ(32*1024U + 1, stack_size); 530#if defined(__BIONIC__) 531 // Bionic rounds up, which is what POSIX allows. 532 ASSERT_EQ(GetActualStackSize(attributes), (32 + 4)*1024U); 533#else // __BIONIC__ 534 // glibc rounds down, in violation of POSIX. They document this in their BUGS section. 535 ASSERT_EQ(GetActualStackSize(attributes), 32*1024U); 536#endif // __BIONIC__ 537} 538 539TEST(pthread, pthread_rwlock_smoke) { 540 pthread_rwlock_t l; 541 ASSERT_EQ(0, pthread_rwlock_init(&l, NULL)); 542 543 ASSERT_EQ(0, pthread_rwlock_rdlock(&l)); 544 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 545 546 ASSERT_EQ(0, pthread_rwlock_wrlock(&l)); 547 ASSERT_EQ(0, pthread_rwlock_unlock(&l)); 548 549 ASSERT_EQ(0, pthread_rwlock_destroy(&l)); 550} 551 552static int gOnceFnCallCount = 0; 553static void OnceFn() { 554 ++gOnceFnCallCount; 555} 556 557TEST(pthread, pthread_once_smoke) { 558 pthread_once_t once_control = PTHREAD_ONCE_INIT; 559 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 560 ASSERT_EQ(0, pthread_once(&once_control, OnceFn)); 561 ASSERT_EQ(1, gOnceFnCallCount); 562} 563 564static int gAtForkPrepareCalls = 0; 565static void AtForkPrepare1() { gAtForkPrepareCalls = (gAtForkPrepareCalls << 4) | 1; } 566static void AtForkPrepare2() { gAtForkPrepareCalls = (gAtForkPrepareCalls << 4) | 2; } 567static int gAtForkParentCalls = 0; 568static void AtForkParent1() { gAtForkParentCalls = (gAtForkParentCalls << 4) | 1; } 569static void AtForkParent2() { gAtForkParentCalls = (gAtForkParentCalls << 4) | 2; } 570static int gAtForkChildCalls = 0; 571static void AtForkChild1() { gAtForkChildCalls = (gAtForkChildCalls << 4) | 1; } 572static void AtForkChild2() { gAtForkChildCalls = (gAtForkChildCalls << 4) | 2; } 573 574TEST(pthread, pthread_atfork) { 575 ASSERT_EQ(0, pthread_atfork(AtForkPrepare1, AtForkParent1, AtForkChild1)); 576 ASSERT_EQ(0, pthread_atfork(AtForkPrepare2, AtForkParent2, AtForkChild2)); 577 578 int pid = fork(); 579 ASSERT_NE(-1, pid) << strerror(errno); 580 581 // Child and parent calls are made in the order they were registered. 582 if (pid == 0) { 583 ASSERT_EQ(0x12, gAtForkChildCalls); 584 _exit(0); 585 } 586 ASSERT_EQ(0x12, gAtForkParentCalls); 587 588 // Prepare calls are made in the reverse order. 589 ASSERT_EQ(0x21, gAtForkPrepareCalls); 590} 591 592TEST(pthread, pthread_attr_getscope) { 593 pthread_attr_t attr; 594 ASSERT_EQ(0, pthread_attr_init(&attr)); 595 596 int scope; 597 ASSERT_EQ(0, pthread_attr_getscope(&attr, &scope)); 598 ASSERT_EQ(PTHREAD_SCOPE_SYSTEM, scope); 599} 600