RFR: 8356255: Add Stable Field Updaters to allow efficient lazy field evaluations

[Chen Liang]

On Tue, 6 May 2025 11:33:27 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> Calling the method that computes hash.
>
> This would require another implementation to be written. Maybe we can add that later?

I feel like declaring a function is declaring redundant classes when we can just reuse a DirectMethodHandle pointing to an actual method. Also the zero alternative should be handled by the provided computing function/method instead of handled by this utility.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25040#discussion_r2075357802