1 files changed, 41 insertions, 0 deletions
diff --git a/test/tsan/Darwin/gcd-target-queue-norace.mm b/test/tsan/Darwin/gcd-target-queue-norace.mm
new file mode 100644
index 000000000..36cb1b929
--- /dev/null
+++ b/test/tsan/Darwin/gcd-target-queue-norace.mm
@@ -0,0 +1,41 @@
+// RUN: %clang_tsan %s -o %t -framework Foundation
+// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s
+
+#import <Foundation/Foundation.h>
+
+long global;
+
+int main(int argc, const char *argv[]) {
+  dispatch_queue_t target_queue = dispatch_queue_create(NULL, DISPATCH_QUEUE_SERIAL);
+  dispatch_queue_t q1 = dispatch_queue_create(NULL, DISPATCH_QUEUE_CONCURRENT);
+  dispatch_queue_t q2 = dispatch_queue_create(NULL, DISPATCH_QUEUE_CONCURRENT);
+  dispatch_set_target_queue(q1, target_queue);
+  dispatch_set_target_queue(q2, target_queue);
+
+  for (int i = 0; i < 100000; i++) {
+    dispatch_async(q1, ^{
+      global++;
+
+      if (global == 200000) {
+        dispatch_sync(dispatch_get_main_queue(), ^{
+          CFRunLoopStop(CFRunLoopGetCurrent());
+        });
+      }
+    });
+    dispatch_async(q2, ^{
+      global++;
+
+      if (global == 200000) {
+        dispatch_sync(dispatch_get_main_queue(), ^{
+          CFRunLoopStop(CFRunLoopGetCurrent());
+        });
+      }
+    });
+  }
+
+  CFRunLoopRun();
+  NSLog(@"Done.");
+  return 0;
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer