RFR (3rd): 8140257: Add support for "gc service threads" to ConcurrentGCThread

[Kim Barrett]

> On Mar 10, 2016, at 11:51 AM, Derek White <derek.white at oracle.com> wrote:
> 
> Thanks Per,
> 
> I made the change and spun a new webrev for the curious, and ran through jprt.
> 
> Any comments Kim?
> 
> *Bug*: https://bugs.openjdk.java.net/browse/JDK-8140257
> *Webrev*: http://cr.openjdk.java.net/~drwhite/8140257/webrev.05/
> *Incremental webrev:*
> http://cr.openjdk.java.net/~drwhite/8140257/webrev.v04.v05/
> 
> - 

Looks good.

One minor thing below.  I don’t need a new webrev if that change is made.

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src/share/vm/gc/shared/concurrentGCThread.hpp
  43   void initialize_in_thread();
  46   void wait_for_universe_init();
  50   void terminate();

Do these still need to be protected?  I suspect they could be private.

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