RFR: 8305755: [JVMCI] missing barriers in CompilerToVM.readFieldValue for Reference.referent

Sat Apr 8 07:47:42 UTC 2023

On Fri, 7 Apr 2023 20:13:55 GMT, Tom Rodriguez <never at openjdk.org> wrote:

> And that will include the G1 barrier required for `Reference.get()` semantics as well?  And a second question is whether we can safely perform this read for all Reference subtypes.

Yes, as long as you keep ON_UNKNOWN_OOP_REF. And yes, you can safely do this for all reference types.

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PR Comment: https://git.openjdk.org/jdk/pull/13389#issuecomment-1500816879