RFR: 8286446: PPC64: fix crashes after JDK-8284161 (virtual threads preview)

Mon May 9 23:40:37 UTC 2022

On Mon, 9 May 2022 22:45:49 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> With this change `java -version` succeeds with the devkit build also the standard build on a ppc64le box does not crash anymore.
> 
> Also tier1 tests don't look too bad.

@coleenp @pron would be great if you could have a look at the small shared code changes.

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PR: https://git.openjdk.java.net/jdk/pull/8617