RFR: 8360702: runtime/Thread/AsyncExceptionTest.java timed out

[Patricio Chilano Mateo]

Please review this small test fix. To make sure the worker thread receives the async exception at a safe place, we should avoid using synchronization objects where the worker thread might need to unpark the main thread. Otherwise, if the main thread is virtual, the async exception might be set while the worker is still executing FJP code. See JBS comments for more detail.

I fixed test AsyncExceptionOnMonitorEnter.java too and removed it from test/hotspot/jtreg/ProblemList-Virtual.txt. The alternative was to problem list AsyncExceptionTest.java, but I think it’s better if we can just keep the tests for this mode too.

Thanks,
Patricio

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Commit messages:
 - v1

Changes: https://git.openjdk.org/jdk/pull/27582/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27582&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8360702
  Stats: 48 lines in 3 files changed: 19 ins; 18 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/27582.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27582/head:pull/27582

PR: https://git.openjdk.org/jdk/pull/27582