[jdk21u-dev] RFR: 8369946: Bytecode rewriting causes Java heap corruption on PPC

Thu Oct 23 13:21:25 UTC 2025

Backport of [JDK-8369946](https://bugs.openjdk.org/browse/JDK-8369946) from jdk head. This PR differs from the original change because some interpreter changes belonging to [JDK-8301993](https://bugs.openjdk.org/browse/JDK-8301993) are not in jdk21u. Fortunately, the inserted memory barriers can be mapped 1:1.

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Commit messages:
 - Backport 6bf3581bbacc2ed8f6411d23a5ab332376c53c87

Changes: https://git.openjdk.org/jdk21u-dev/pull/2384/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2384&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369946
  Stats: 19 lines in 3 files changed: 12 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2384.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2384/head:pull/2384

PR: https://git.openjdk.org/jdk21u-dev/pull/2384