RFR 8249837: Avoid direct or implicit Thread::current() calls when we already have a current thread variable

[Vladimir Kozlov]

Compiler and jvmci code change slooks good.

Thanks,
Vladimir K

On 7/29/20 8:54 AM, coleen.phillimore at oracle.com wrote:
> Summary: Add current thread and/or moved HandleMark to the scope that it is needed
> 
> This patch removes HandleMarks from the GC code.  I added a NoHandleMark to these places and found the locations in the 
> verification code that needs the HandleMarks, and moved them there.
> 
> Tested with tier1-6 with no failures.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8249837.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8249837
> 
> Thanks,
> Coleen