1 files changed, 26 insertions, 0 deletions
diff --git a/compiler-rt/lib/tsan/lit_tests/simple_race.c b/compiler-rt/lib/tsan/lit_tests/simple_race.c
new file mode 100644
index 00000000000..44aff897406
--- /dev/null
+++ b/compiler-rt/lib/tsan/lit_tests/simple_race.c
@@ -0,0 +1,26 @@
+// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+
+int Global;
+
+void *Thread1(void *x) {
+  Global = 42;
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  Global = 43;
+  return NULL;
+}
+
+int main() {
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  return 0;
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race