45   Mutex mu;  member in Test
46   int a GUARDED_BY(mu);  // expected-note3 {{Guarded_by declared here.}}
48   void foo1() EXCLUSIVE_LOCKS_REQUIRED(mu);
49   void foo2() SHARED_LOCKS_REQUIRED(mu);
50   void foo3() LOCKS_EXCLUDED(mu);
69     mu.ReaderLock();  in test5()
71     mu.Unlock();  in test5()
75     mu.ReaderLock();  in test6()
77     mu.Unlock();  in test6()
81     mu.Lock();  in test7()
83     mu.Unlock();  in test7()