1 files changed, 31 insertions, 0 deletions
diff --git a/compiler-rt/lib/tsan/lit_tests/race_on_barrier.c b/compiler-rt/lib/tsan/lit_tests/race_on_barrier.c
new file mode 100644
index 00000000000..491201f13ba
--- /dev/null
+++ b/compiler-rt/lib/tsan/lit_tests/race_on_barrier.c
@@ -0,0 +1,31 @@
+// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+
+pthread_barrier_t B;
+int Global;
+
+void *Thread1(void *x) {
+  pthread_barrier_init(&B, 0, 2);
+  pthread_barrier_wait(&B);
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  usleep(1000000);
+  pthread_barrier_wait(&B);
+  return NULL;
+}
+
+int main() {
+  pthread_t t;
+  pthread_create(&t, NULL, Thread1, NULL);
+  Thread2(0);
+  pthread_join(t, NULL);
+  pthread_barrier_destroy(&B);
+  return 0;
+}
+
+// CHECK:      WARNING: ThreadSanitizer: data race