RFR: 8361055: Serial: Inline SerialHeap::process_roots [v5]

[Kim Barrett]

On Fri, 18 Jul 2025 13:14:38 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Refactor roots processing in Serial (young-gc and full-gc) to clean up the control-flow and make is clearer what roots and closures are used in each context.
>> 
>> Test: tier1-8
>
> Albert Mingkun Yang 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 eight additional commits since the last revision:
> 
>  - review
>  - Merge branch 'master' into sgc-roots
>  - review
>  - Merge branch 'master' into sgc-roots
>  - review
>  - Merge branch 'master' into sgc-roots
>  - review
>  - sgc-roots

I'm still not entirely convinced that spreading things out is an improvement.
I think I would have preferred improvements to the centralized approach.
But this is better than what we currently have.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26038#pullrequestreview-3056891044