RFR: 8288064: Class initialization locking

[Robbin Ehn]

On Mon, 13 Jun 2022 17:02:44 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Use a native JVM monitor and state for mutual exclusion for class linking and initialization.  See CR for more details.
> Tested with tier1-8. tiers 1-4 on Oracle supported platforms and 5-8 on linux-x64-debug.  There isn't any platform dependent code in this change.

Looks fine to me, just make sure it passes JCK.

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Marked as reviewed by rehn (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9141