[jdk11u-dev] RFR: 8274687: JDWP deadlocks if some Java thread reaches wait in blockOnDebuggerSuspend [v2]

[Richard Reingruber]

> Hi all,
> 
> This pull request contains a backport of commit [ca2efb73](https://github.com/openjdk/jdk/commit/ca2efb73f59112d9be2ec29db405deb4c58dd435) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.
> 
> The commit being backported was authored by Richard Reingruber on 15 Nov 2021 and was reviewed by Chris Plummer, Serguei Spitsyn and Ralf Schmelter.
> 
> The commit applied cleanly except for one minor conflict because of the comments on the declarations of `current_ei` and `pendingStop` not present in jdk11.
> 
> The backport passed our CI testing. This includes most JCK and JTREG tiers 1-4, also in Xcomp mode, on the standard platforms and also on ppc64le and s390x.
> 
> Thanks!
> Richard.

Richard Reingruber has updated the pull request incrementally with one additional commit since the last revision:

  Backport xxs test lib changes from JDK-8255381

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1189/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1189/files/ef2fabac..bd31af77

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1189&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1189&range=00-01

  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1189.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1189/head:pull/1189

PR: https://git.openjdk.org/jdk11u-dev/pull/1189