[lworld] RFR: 8271924: [lworld] Crashes in ZBarrierSetRuntime::load_barrier_on_oop_array [v2]

[Tobias Hartmann]

> - Cherry picking the fix for [JDK-8271925](https://bugs.openjdk.java.net/browse/JDK-8271925) (mainline issue) to give it some more testing in Valhalla and to get the CI clean (it currently only reproduces in Valhalla).
> - Moved TestNativeClone.java to the ZGC problem list because no other GCs are affected. I'll remove it from the problem list once [JDK-8271925](https://bugs.openjdk.java.net/browse/JDK-8271925) got fixed in mainline.
> - Fixed the missing merge of [JDK-8269828](https://bugs.openjdk.java.net/browse/JDK-8269828).
> - Fixed an intermittent crash/assert in `ciKlass::is_subtype_of` because `this` is not loaded.
> 
> Best regards,
> Tobias

Tobias Hartmann has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge branch 'lworld' into JDK-8271924
 - Fixed merge of JDK-8269828
 - 8271924: [lworld] Crashes in ZBarrierSetRuntime::load_barrier_on_oop_array

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

Changes: https://git.openjdk.java.net/valhalla/pull/523/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=523&range=01
  Stats: 24 lines in 6 files changed: 8 ins; 1 del; 15 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/523.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/523/head:pull/523

PR: https://git.openjdk.java.net/valhalla/pull/523