RFR (L) 8244997: Convert the JavaThread::_threadObj oop to use OopStorage

[Erik Österlund]

Hi Coleen,

I think this looks good.

One nit. In the C1 code, the first load should be T_ADDRESS instead of 
T_METADATA.
Don't need another webrev for that.

Thanks,
/Erik

On 2020-08-06 14:40, Coleen Phillimore wrote:
> Summary: Move the oop and handle releasing it in the service thread. 
> Remove Universe::oops_do from callers.
>
> See bug for more details and discussion.  C2 code provided by Erik 
> Osterlund and Graal changes provided by Tom Rodriguez.
>
> Tested with tiers 1-8.
>
> bug link https://bugs.openjdk.java.net/browse/JDK-8244997
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8244997.01/webrev
>
> Copyrights fixed, not in this webrev.
>
> Thanks,
> Coleen