diff options
Diffstat (limited to 'test/tsan/signal_cond.cc')
-rw-r--r-- | test/tsan/signal_cond.cc | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/test/tsan/signal_cond.cc b/test/tsan/signal_cond.cc new file mode 100644 index 000000000000..f5eae745d407 --- /dev/null +++ b/test/tsan/signal_cond.cc @@ -0,0 +1,51 @@ +// 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://code.google.com/p/thread-sanitizer/issues/detail?id=91 + +int g_thread_run = 1; +pthread_mutex_t mutex; +pthread_cond_t cond; +sem_t sem; + +void sig_handler(int sig) { + (void)sig; + write(1, "SIGNAL\n", sizeof("SIGNAL\n") - 1); + sem_post(&sem); +} + +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() { + sem_init(&sem, 0, 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); + while (sem_wait(&sem) == -1 && errno == EINTR) { + } + 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 |