Review Request: 7196045 Possible JVM deadlock in ThreadTimesClosure

[Kevin Walls]

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