Hi,

I'd like to get this reviewed, it's a deadlock that can happen due to Java objects being allocated while holding Threads_lock.

We need to collect just the characters of the thread names while holding the lock, and create the String objects when it's released. You do need to hit the (non-public) HotspotInternal MBean very rapidly to trigger this reliably, but there's a small chance the deadlock could happen when it's called by the tool that is meant to call it.

http://cr.openjdk.java.net/~kevinw/7196045/webrev.01/

Thanks!
Kevin

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