RFR: 8376666: Convert various BlockOffsetTables to use Atomic<T>

[Thomas Schatzl]

On Thu, 29 Jan 2026 09:22:07 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> 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. I filed https://bugs.openjdk.org/browse/JDK-8376667 though, not finding a pre-existing RFE.
> 
> Testing: tier1-5, gha

GHA issue is infra issue.

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PR Comment: https://git.openjdk.org/jdk/pull/29482#issuecomment-3836113200