RFR: 8360702: runtime/Thread/AsyncExceptionTest.java timed out [v4]

[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

Patricio Chilano Mateo has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:

 - use int
 - Merge branch 'master' into JDK-8360702
 - Remove extra space
 - Remove finally block
 - David's comments
 - v1

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Changes: https://git.openjdk.org/jdk/pull/27582/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27582&range=03
  Stats: 51 lines in 2 files changed: 20 ins; 18 del; 13 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