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// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include "test.h"
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include <semaphore.h>
// Test that signals can be delivered to blocked pthread_cond_wait.
// https://github.com/google/sanitizers/issues/498
int g_thread_run = 1;
pthread_mutex_t mutex;
pthread_cond_t cond;
void sig_handler(int sig) {
(void)sig;
write(2, "SIGNAL\n", sizeof("SIGNAL\n") - 1);
barrier_wait(&barrier);
}
void* my_thread(void* arg) {
pthread_mutex_lock(&mutex);
while (g_thread_run)
pthread_cond_wait(&cond, &mutex);
pthread_mutex_unlock(&mutex);
return 0;
}
int main() {
barrier_init(&barrier, 2);
pthread_mutex_init(&mutex, 0);
pthread_cond_init(&cond, 0);
signal(SIGUSR1, &sig_handler);
pthread_t thr;
pthread_create(&thr, 0, &my_thread, 0);
// wait for thread to get inside pthread_cond_wait
// (can't use barrier_wait for that)
sleep(1);
pthread_kill(thr, SIGUSR1);
barrier_wait(&barrier);
pthread_mutex_lock(&mutex);
g_thread_run = 0;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
pthread_join(thr, 0);
fprintf(stderr, "DONE\n");
return 0;
}
// CHECK: SIGNAL
// CHECK: DONE
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