Integrated: 8376126: G1: Convert remaining volatiles in G1ConcurrentMark to Atomic<T>

[Thomas Schatzl]

On Thu, 22 Jan 2026 16:36:08 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please convert remaining volatile declarations in `G1ConcurrentMark` to use `Atomic<T>`. These volatiles are used to indicate concurrent phased access (like changing the variable in thread A, then reading the variable in thread B while A is dormant, or only ever updating it in one direction) where concurrency safety is provided by barriers between these phases. But there are also other cases)
> 
> The exception is `G1ConcurrentMark::_finger` that has apparently been overlooked in an earlier changes.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

This pull request has now been integrated.

Changeset: b6024988
Author:    Thomas Schatzl <tschatzl at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/b60249882cc511a7fc9cf9ae11e8beb1602ea10f
Stats:     64 lines in 4 files changed: 10 ins; 0 del; 54 mod

8376126: G1: Convert remaining volatiles in G1ConcurrentMark to Atomic<T>

Reviewed-by: iwalulya, kbarrett, stefank

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PR: https://git.openjdk.org/jdk/pull/29368