RFR: 8272736: [JVMCI] Add API for reading and writing JVMCI thread locals [v2]

[Tom Rodriguez]

On Fri, 20 Aug 2021 15:24:34 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Tom Rodriguez has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR.
>
> src/hotspot/share/runtime/thread.hpp line 996:
> 
>> 994:     return _jvmci_reserved1;
>> 995:   }
>> 996: 
> 
> This makes me reprise my wish that this code was in jvmciThread.hpp and you indirect from thread to there.  Can you do that?  There's already an RFE somewhere.

I hadn't forgotten about that but I have been putting it off a bit.  I'll prioritize it.  The RFE is https://bugs.openjdk.java.net/browse/JDK-8137018

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PR: https://git.openjdk.java.net/jdk/pull/5192