RFR: 8354668: Missing REX2 prefix accounting in ZGC barriers leads to incorrect encoding [v2]

[Jatin Bhateja]

On Wed, 16 Apr 2025 21:10:38 GMT, Dean Long <dlong at openjdk.org> wrote:

> Yes, I am suggesting doing something like:
> 
> ```
>       __ relocate(__ pc() - 4, barrier_Relocation::spec(), ZBarrierRelocationFormatStoreGoodAfterOr);
> ```
> 
> which would be a bigger change to the implementation.

Yes, this is what I mean by address caching in my above comment. we already have an existing interface for it in place; the intent of this bug fix PR is not to improve upon the infrastructure but to align the fix with the current scheme. Do you suggest doing that in a follow up PR ?

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PR Comment: https://git.openjdk.org/jdk/pull/24664#issuecomment-2811561649