RFR: 8337779: test/jdk/jdk/jfr/jvm/TestHiddenWait.java is a bit fragile

[Erik Gahlin]

Could I have a review of a test fix that allows for other threads than the test or JFR threads to emit events during the test, i.e. events from the "Common-Cleaner" thread.

Testing: jdk/jdk/jfr/jvm/TestHiddenWait.java

Thanks
Erik

-------------

Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/20459/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20459&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337779
  Stats: 9 lines in 1 file changed: 9 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/20459.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20459/head:pull/20459

PR: https://git.openjdk.org/jdk/pull/20459