RFR: 8344302: G1: Refactor G1CMTask::do_marking_step to use smaller wrapper methods

[Thomas Schatzl]

On Fri, 15 Nov 2024 12:34:34 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

> Hi all,
> 
> Please review this refactoring of G1CMTask::do_marking_step, breaking it down into multiple helper methods to improve readability.
> 
> Testing: Tier-1

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22147#pullrequestreview-2444472884