RFR: 8296158: Refactor the verification of CDS region checksum [v2]

[Ioi Lam]

On Tue, 14 Feb 2023 22:06:04 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

>> Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   @matias9927 suggestions
>
> LGTM!

Thanks @matias9927 and @calvinccheung for the review

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PR: https://git.openjdk.org/jdk/pull/12424