Pirama Arumuga Nainar | 259f706 | 2015-05-06 11:49:53 -0700 | [diff] [blame] | 1 | // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| 2 | #include "test.h" |
| 3 | #include <signal.h> |
| 4 | #include <unistd.h> |
| 5 | #include <errno.h> |
| 6 | #include <semaphore.h> |
| 7 | |
| 8 | // Test that signals can be delivered to blocked pthread_cond_wait. |
| 9 | // https://code.google.com/p/thread-sanitizer/issues/detail?id=91 |
| 10 | |
| 11 | int g_thread_run = 1; |
| 12 | pthread_mutex_t mutex; |
| 13 | pthread_cond_t cond; |
| 14 | sem_t sem; |
| 15 | |
| 16 | void sig_handler(int sig) { |
| 17 | (void)sig; |
| 18 | write(1, "SIGNAL\n", sizeof("SIGNAL\n") - 1); |
| 19 | sem_post(&sem); |
| 20 | } |
| 21 | |
| 22 | void* my_thread(void* arg) { |
| 23 | pthread_mutex_lock(&mutex); |
| 24 | while (g_thread_run) |
| 25 | pthread_cond_wait(&cond, &mutex); |
| 26 | pthread_mutex_unlock(&mutex); |
| 27 | return 0; |
| 28 | } |
| 29 | |
| 30 | int main() { |
| 31 | sem_init(&sem, 0, 0); |
| 32 | signal(SIGUSR1, &sig_handler); |
| 33 | pthread_t thr; |
| 34 | pthread_create(&thr, 0, &my_thread, 0); |
| 35 | // wait for thread to get inside pthread_cond_wait |
| 36 | // (can't use barrier_wait for that) |
| 37 | sleep(1); |
| 38 | pthread_kill(thr, SIGUSR1); |
| 39 | while (sem_wait(&sem) == -1 && errno == EINTR) { |
| 40 | } |
| 41 | pthread_mutex_lock(&mutex); |
| 42 | g_thread_run = 0; |
| 43 | pthread_cond_signal(&cond); |
| 44 | pthread_mutex_unlock(&mutex); |
| 45 | pthread_join(thr, 0); |
| 46 | fprintf(stderr, "DONE\n"); |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | // CHECK: SIGNAL |
| 51 | // CHECK: DONE |