RFR: 8349145: Make Class.getProtectionDomain() non-native [v4]

[Coleen Phillimore]

On Tue, 4 Feb 2025 14:06:07 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Thanks for looking at this.  I didn't want to change this with this change.
>
> There may need to be some follow-on cleanup, e.g. I'm wondering if Lookup.cachedProtectionDomain is needed now.

One of the reasons I wanted to move this out of Hotspot as a native call is that it might make further work with ProtectionDomain easier to do all in Java, except there's still a bit of coupling in the JVM with the name of the class and that it's passed through defineClass (resolve_from_stream) and initialized in the mirror.  So I guess that's still a lot.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23396#discussion_r1941345990