RFR: 8374694: ZGC: Convert zRootsIterator to use Atomic<T> [v2]

Tue Jan 27 08:49:06 UTC 2026

> Convert usages of AtomicAccess to Atomic<T> in zRootsIterator.
> 
> Testing:
>  * GHA
>  * HotSpot GC tests with ZGC linux x64 and linux aarch64

Axel Boldt-Christmas 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:

 - Remove unnecessary whitespace
 - Merge remote-tracking branch 'upstream_jdk/master' into JDK-8374694
 - ZGC: Convert zRootsIterator to use Atomic<T>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/29270/files
  - new: https://git.openjdk.org/jdk/pull/29270/files/c21b49dc..8c735e82

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29270&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29270&range=00-01

  Stats: 64708 lines in 1319 files changed: 36563 ins; 13389 del; 14756 mod
  Patch: https://git.openjdk.org/jdk/pull/29270.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29270/head:pull/29270

PR: https://git.openjdk.org/jdk/pull/29270