RFR: 8376335: Convert PreservedMarks classes to use Atomic<T>

[Stefan Karlsson]

On Mon, 26 Jan 2026 15:15:23 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this change to make the `PreservedMarks` classes use `Atomic<T>`.
> 
> Some refactoring allowed removal of a now unnecessary function, and imo improved the code, avoiding the somewhat awkward passing of the atomic variable.
> 
> Testing: gha, tier1-5
> 
> Thanks,
>   Thomas

src/hotspot/share/gc/shared/preservedMarks.cpp line 36:

> 34: 
> 35: size_t PreservedMarks::restore() {
> 36:   size_t result = size();

It seems to me that this is something the caller should do instead.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29422#discussion_r2731887927