2891   Mutex mu3_;  member in DuplicateAttributeTest::Foo
2894   int c GUARDED_BY(mu3_);
2901   void lock3()  EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_);
2905     EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_);
2908   void unlock3() UNLOCK_FUNCTION(mu1_, mu2_, mu3_);
2912     UNLOCK_FUNCTION(mu1_, mu2_, mu3_);
2927 void Foo::lock3()  EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_) {  in lock3()
2930   mu3_.Lock();  in lock3()
2935     EXCLUSIVE_LOCK_FUNCTION(mu2_, mu3_) {  in locklots()
2938   mu3_.Lock();  in locklots()
2945 void Foo::unlock3() UNLOCK_FUNCTION(mu1_, mu2_, mu3_) {  in unlock3()
2948   mu3_.Unlock();  in unlock3()
2953     UNLOCK_FUNCTION(mu2_, mu3_) {  in unlocklots()
2956   mu3_.Unlock();  in unlocklots()