[lilliput-jdk17u:lilliput] RFR: 8308423: [Lilliput/JDK17] Cherry-pick GC forwarding [v3]

[Aleksey Shipilev]

On Wed, 24 May 2023 18:51:07 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> I'd like to pick up the improvements that have been made in full-GC and self-forwarding in the upstream issues [JDK-8305896](https://bugs.openjdk.org/browse/JDK-8305896) and [JDK-8305898](https://bugs.openjdk.org/browse/JDK-8305898). Let's port them to Lilliput/JDK17.
>> 
>> The version in upstream PR uses resourceHash.hpp as fallback-table. Unfortunately, that doesn't cleanly work with the JDK17 version of resourceHash.hpp, so I used an earlier version with a self-implemented fallback-table.
>> 
>> Testing:
>>  - [x] hotspot_gc
>>  - [x] tier1
>>  - [ ] tier2
>
> Roman Kennke has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Merge branch 'lilliput' into JDK-8308423
>  - Add missing fastHash.hpp
>  - 8308423: [Lilliput/JDK17] Cherry-pick GC forwarding

Looks fine. This looks integrateable, if tests are clean?

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/lilliput-jdk17u/pull/22#pullrequestreview-1444021048