RFR (M) 8249768: Move static oops and NullPointerException oops from Universe into OopStorage

[Erik Österlund]

Hi Coleen,

This looks good to me. It's still a bit shady to me that assignment of 
OopHandles overwrites the oop*, potentially causing memory leaks (the 
previous oop* is not released).
Therefore, it is implied that setters are only used once, to store a new 
handle over an uninitialized handle. But we can fix the safety of this 
in another patch.

Thanks,
/Erik

On 2020-07-20 22:53, coleen.phillimore at oracle.com wrote:
> Summary: Move static oops into OopStorage and make NPE oops an 
> objArrayOop.
>
> I've broken up moving oops in Universe to OopStorage into several 
> parts.  This change moves the global static oops.  These OopHandles 
> are not released.
>
> This has been tested with tier1-3 and on also remote-build -b 
> linux-arm32,linux-ppc64le-debug,linux-s390x-debug,linux-x64-zero.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8249768.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8249768
>
> Thanks,
> Coleen