RFR(s): 8236766: Remove un-used oops do and drain list in VM thread.

[coleen.phillimore at oracle.com]

Robbin, this looks good.  I was looking for where we used to have oops 
in VM_Operation (it was VM_ThreadStop), which is now a handshake.  So 
this is good.  This line should have also been removed though:

$ grep -ri threadstop
share/runtime/vmOperations.hpp:  template(ThreadStop)
$

Can you remove this too?

Thanks,
Coleen

On 1/10/20 4:35 AM, Robbin Ehn wrote:
> Hi all, please review.
>
> We have removed all oops and oops do from the VM operations.
> We can now remove the oops do on VM op base class, oops do on VM queue 
> and the drain list.
>
> Note that I also removed the unused VMOperationQueue::verify_queue.
>
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8236766
>
> Changeset:
> http://cr.openjdk.java.net/~rehn/8236766/v1/webrev/index.html
>
> Passes t1-3.
>
> Thanks, Robbin