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://github.com/google/sanitizers/issues/498 10 11 int g_thread_run = 1; 12 pthread_mutex_t mutex; 13 pthread_cond_t cond; 14 15 void sig_handler(int sig) { 16 (void)sig; 17 write(1, "SIGNAL\n", sizeof("SIGNAL\n") - 1); 18 barrier_wait(&barrier); 19 } 20 21 void* my_thread(void* arg) { 22 pthread_mutex_lock(&mutex); 23 while (g_thread_run) 24 pthread_cond_wait(&cond, &mutex); 25 pthread_mutex_unlock(&mutex); 26 return 0; 27 } 28 29 int main() { 30 barrier_init(&barrier, 2); 31 32 pthread_mutex_init(&mutex, 0); 33 pthread_cond_init(&cond, 0); 34 35 signal(SIGUSR1, &sig_handler); 36 pthread_t thr; 37 pthread_create(&thr, 0, &my_thread, 0); 38 // wait for thread to get inside pthread_cond_wait 39 // (can't use barrier_wait for that) 40 sleep(1); 41 pthread_kill(thr, SIGUSR1); 42 barrier_wait(&barrier); 43 pthread_mutex_lock(&mutex); 44 g_thread_run = 0; 45 pthread_cond_signal(&cond); 46 pthread_mutex_unlock(&mutex); 47 pthread_join(thr, 0); 48 fprintf(stderr, "DONE\n"); 49 return 0; 50 } 51 52 // CHECK: SIGNAL 53 // CHECK: DONE 54
