RFR: 8376666: Convert G1BlockOffsetTable to use Atomic<T> [v2]

[Thomas Schatzl]

On Wed, 4 Feb 2026 13:09:48 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Thomas Schatzl 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:
>> 
>>  - * only change G1 BOT for now
>>  - Merge branch 'master' into 8376666-convert-bot
>>  - 8376666
>>    
>>    Hi all,
>>    
>>      please review this conversion of the various block offset tables to use `Atomic<T>`. Since they are very similar, and mostly changes from `uint8*` to `Atomic<uint8>*` I merged the conversion together.
>>    
>>    It is not the goal to actually merge them into one class that all three collectors use.
>>    
>>    Testing: tier1-5, gha
>
> Marked as reviewed by iwalulya (Reviewer).

Thanks @walulyai @albertnetymk for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/29482#issuecomment-3876111090