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-rw-r--r--test/tsan/Darwin/objc-race.mm55
1 files changed, 55 insertions, 0 deletions
diff --git a/test/tsan/Darwin/objc-race.mm b/test/tsan/Darwin/objc-race.mm
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index 000000000000..bd93d2f1c2ea
--- /dev/null
+++ b/test/tsan/Darwin/objc-race.mm
@@ -0,0 +1,55 @@
+// RUN: %clang_tsan %s -o %t -framework Foundation
+// RUN: %deflake %run %t 2>&1
+
+#import <Foundation/Foundation.h>
+
+#import "../test.h"
+
+@interface MyClass : NSObject {
+ long instance_variable;
+}
+- (void)method:(long)value;
+@end
+
+@implementation MyClass
+
+- (void)method:(long)value {
+ self->instance_variable = value;
+}
+
+@end
+
+int main() {
+ NSLog(@"Hello world.");
+ barrier_init(&barrier, 2);
+
+ MyClass *my_object = [MyClass new];
+ [my_object method:42];
+
+ dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+ [my_object method:43];
+ barrier_wait(&barrier);
+ });
+
+ dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+ barrier_wait(&barrier);
+ [my_object method:44];
+
+ dispatch_sync(dispatch_get_main_queue(), ^{
+ CFRunLoopStop(CFRunLoopGetCurrent());
+ });
+ });
+
+ CFRunLoopRun();
+ NSLog(@"Done.");
+ return 0;
+}
+
+// CHECK: Hello world.
+// CHECK: WARNING: ThreadSanitizer: data race
+// CHECK: Write of size 8
+// CHECK: #0 -[MyClass method:]
+// CHECK: Write of size 8
+// CHECK: #0 -[MyClass method:]
+// CHECK: Location is heap block
+// CHECK: Done.