[jdk26] RFR: 8373116: Genshen: arraycopy_work should be always done for arrays in old gen during young concurrent marking

Wed Dec 10 17:07:37 UTC 2025

Hi all,

This pull request contains a clean backport of commit [c9ab330b](https://github.com/openjdk/jdk/commit/c9ab330b7bdd3cc2410ffdb336a63aa0ac7256a3) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Xiaolong Peng on 9 Dec 2025 and was reviewed by William Kemper and Kelvin Nilsen.

It is a necessary bug fix to address the crash caused by recently change to arraycopy barrier. 

Thanks!

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Commit messages:
 - Backport c9ab330b7bdd3cc2410ffdb336a63aa0ac7256a3

Changes: https://git.openjdk.org/jdk/pull/28751/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28751&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373116
  Stats: 10 lines in 2 files changed: 5 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/28751.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28751/head:pull/28751

PR: https://git.openjdk.org/jdk/pull/28751