[jdk25] RFR: 8361952: Installation of MethodData::extra_data_lock() misses synchronization on reader side

Tue Jul 15 18:12:21 UTC 2025

Hi all,

This pull request contains a backport of commit [272e66d0](https://github.com/openjdk/jdk/commit/272e66d017a3497d9af4df6f042c741ad8a59dd6) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Thomas Schatzl on 14 Jul 2025 and was reviewed by Aleksey Shipilev, Coleen Phillimore and David Holmes.

Thanks!

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Commit messages:
 - Backport 272e66d017a3497d9af4df6f042c741ad8a59dd6

Changes: https://git.openjdk.org/jdk/pull/26326/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26326&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361952
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26326.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26326/head:pull/26326

PR: https://git.openjdk.org/jdk/pull/26326