RFR: Loom support for RedefineClasses [v3]

[Ron Pressler]

On Wed, 5 May 2021 13:06:25 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> There's one other possibility: a safepoint stub (in the case of forced preemption). But `StackChunkFrameStream` also has `is_compiled` and `is_stub`. Exactly one of those three would be true for each frame. If `is_compiled`, then you have an nmethod.
>
> I changed this so that it checks if it's interpreted, and then in the else check if cb->is_nmethod() to exclude the stub case.  Does it look right?

Yep. Looks good.

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PR: https://git.openjdk.java.net/loom/pull/38