[jdk21u-dev] RFR: 8314225: SIGSEGV in JavaThread::is_lock_owned

[Martin Doerr]

Clean backport of [JDK-8314225](https://bugs.openjdk.org/browse/JDK-8314225).

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Commit messages:
 - Backport ad0b54d429fdbd806c09aa06bb42f1ed4a0297e8

Changes: https://git.openjdk.org/jdk21u-dev/pull/644/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=644&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314225
  Stats: 98 lines in 11 files changed: 14 ins; 70 del; 14 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/644.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/644/head:pull/644

PR: https://git.openjdk.org/jdk21u-dev/pull/644