RFR: 8332360: JVM hangs at exit when running on a uniprocessor [v3]

[Coleen Phillimore]

> Restored the TryLock in the ReenterI (wait) case with a comment.
> 
> Tested with tier1-4.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Dan's improved comment.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19293/files
  - new: https://git.openjdk.org/jdk/pull/19293/files/5c1cf6b2..16d85721

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19293&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19293&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19293.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19293/head:pull/19293

PR: https://git.openjdk.org/jdk/pull/19293