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    Enhancement 
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    Resolution: Fixed
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     P3 P3
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    12
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        b16
                    Some locks could block the VMThread if held by Java and nonJava threads, like the ClassLoaderDataGraph_lock.  Add some verification so that these locks are not taken while in a safepoint.
            
- relates to
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                    JDK-8213751 ClassLoaderDataGraph::cld_do() should sometimes require CLDG_lock -           
- Resolved
 
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                    JDK-8228901 Make ClassLoaderDataGraph linked list lock free -           
- Closed
 
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                    JDK-8184732 Deadlock detection improvements for 'special' locks -           
- Resolved
 
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                    JDK-8228901 Make ClassLoaderDataGraph linked list lock free -           
- Closed
 
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