[jdk25u-dev] RFR: 8358735: GenShen: block_start() may be incorrect after class unloading

Wed Nov 26 19:20:27 UTC 2025

Backport of JDK-8358735.

The backport is almost clean except that atomic.hpp was renamed to atomicAccess.hpp in later versions, and I had to resolve the conflict by retaining atomic.hpp import.

Our internal application crashed and we identified this was the root cause. Backporting this for the fix.

Testing: pending.

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Commit messages:
 - Backport 8531fa146be1da5e96c0f23091882a27c67d7893

Changes: https://git.openjdk.org/jdk25u-dev/pull/19/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=19&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8358735
  Stats: 893 lines in 12 files changed: 851 ins; 10 del; 32 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/19.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/19/head:pull/19

PR: https://git.openjdk.org/jdk25u-dev/pull/19