[jdk11u-dev] RFR: 8292443: Weak CAS VarHandle/Unsafe tests should test always-failing cases [v2]

[Xiaolin Zheng]

> Backporting JDK-8292443 as an RFE for testing. Please see the discussion thread in [JDK-8292443](https://bugs.openjdk.org/browse/JDK-8292443): changes related to [JDK-8207146](https://bugs.openjdk.org/browse/JDK-8207146) were dropped.
> 
> Most of code in this patch is generated by the fixed `generate-unsafe-access-tests.sh` after #1852.
> 
> I have verified this on x86_64 and AArch64 machines.
> 
> Thanks,
> Xiaolin

Xiaolin Zheng has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into WeakCAS
 - 8292443: Weak CAS VarHandle/Unsafe tests should test always-failing cases
   
   Reviewed-by: psandoz

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1853/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1853/files/b9123cf3..daca63cb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1853&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1853&range=00-01

  Stats: 4419 lines in 143 files changed: 3407 ins; 642 del; 370 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1853.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1853/head:pull/1853

PR: https://git.openjdk.org/jdk11u-dev/pull/1853