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-rw-r--r--test/tsan/Darwin/gcd-async-race.mm38
1 files changed, 38 insertions, 0 deletions
diff --git a/test/tsan/Darwin/gcd-async-race.mm b/test/tsan/Darwin/gcd-async-race.mm
new file mode 100644
index 000000000000..31163f972896
--- /dev/null
+++ b/test/tsan/Darwin/gcd-async-race.mm
@@ -0,0 +1,38 @@
+// RUN: %clang_tsan %s -o %t -framework Foundation
+// RUN: %deflake %run %t 2>&1
+
+#import <Foundation/Foundation.h>
+
+#import "../test.h"
+
+long global;
+
+int main() {
+ NSLog(@"Hello world.");
+ NSLog(@"addr=%p\n", &global);
+ barrier_init(&barrier, 2);
+
+ global = 42;
+ dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+ global = 43;
+ barrier_wait(&barrier);
+ });
+
+ dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+ barrier_wait(&barrier);
+ global = 44;
+
+ dispatch_sync(dispatch_get_main_queue(), ^{
+ CFRunLoopStop(CFRunLoopGetCurrent());
+ });
+ });
+
+ CFRunLoopRun();
+ NSLog(@"Done.");
+}
+
+// CHECK: Hello world.
+// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
+// CHECK: WARNING: ThreadSanitizer: data race
+// CHECK: Location is global 'global' at [[ADDR]] (global_race.cc.exe+0x{{[0-9,a-f]+}})
+// CHECK: Done.