RFR: 8342659: Test vmTestbase/nsk/jdi/ObjectReference/referringObjects/referringObjects002/referringObjects002.java failed: Class nsk.share.jdi.TestClass1 was not unloaded

Thu Oct 16 09:35:34 UTC 2025

Use `Reference.refersTo` API to get more up to date liveness info of a class after OOM is thrown. The approach of relying `Cleaner` thread can incur some "asynchronous" cause various retrying logic, complicating the flow.

The failure rate is ~60% before the fix and no failure for 2000 runs.

Test: tier1-5

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Commit messages:
 - test-unload

Changes: https://git.openjdk.org/jdk/pull/27840/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27840&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342659
  Stats: 42 lines in 2 files changed: 8 ins; 27 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/27840.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27840/head:pull/27840

PR: https://git.openjdk.org/jdk/pull/27840