RFR: 8351091: Shenandoah: global marking context completeness is not accurately maintained [v4]

[Y. Srinivas Ramakrishna]

On Fri, 7 Mar 2025 00:33:58 GMT, Xiaolong Peng <xpeng at openjdk.org> wrote:

>> Right, active_generation should be used instead of global_generation to get the complete marking context, with the context of full GC, even we know it active_generation is the global gen, but it's better not to use global_generation directly for better maintainable code.
>
> Updated it to use active_generation.

Thanks for the fixes; this looks good!

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PR Review Comment: https://git.openjdk.org/jdk/pull/23886#discussion_r2034084571