RFR: 8299072: java_lang_ref_Reference::clear_referent should be GC agnostic

[David Holmes]

On Tue, 20 Dec 2022 07:05:34 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

> The current java_lang_ref_Reference::clear_referent implementation performs a raw reference clear. That doesn't work well with upcoming GC algorithms. It should be made GC agnostic by going through the normal access API.

So `clear_referent` is made GC agnostic, but then all the existing GC's are changed to use the original raw version? Why do they not use the GC agnostic version - performance?

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PR: https://git.openjdk.org/jdk/pull/11736