1 files changed, 53 insertions, 0 deletions
diff --git a/compiler-rt/test/tsan/signal_cond.cpp b/compiler-rt/test/tsan/signal_cond.cpp
new file mode 100644
index 00000000000..6c20dd8f2e3
--- /dev/null
+++ b/compiler-rt/test/tsan/signal_cond.cpp
@@ -0,0 +1,53 @@
+// 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