RFR: 8287200: Test java/lang/management/ThreadMXBean/VirtualThreadDeadlocks.java timed out after JDK-8287103 [v2]

[Leonid Mesnik]

> Need to use proper synchronization.
> 
> The CyclicBarriers might move the thread to WAITING state but not BLOCKED. So it should not confuse existing checks.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  fix

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8874/files
  - new: https://git.openjdk.java.net/jdk/pull/8874/files/3402eb82..c79aa582

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8874&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8874&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8874.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8874/head:pull/8874

PR: https://git.openjdk.java.net/jdk/pull/8874