RFR: 8254693: Add Panama feature to pass heap segments to native code [v8]

[Jorn Vernee]

On Fri, 20 Oct 2023 07:55:45 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

> Why is 84 the maximum? That would result in 170 Java parameters at most, which is well within the 255 limit imposed by the VM spec.

Ah, right, longs take up 2 slots. So, we get 84*3 = 252 + 4 (target address & return buffer) + 2 receiver method handle + NativeEntryPoint, which gives 258. Ok, I'll find out what the limit is and use that

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PR Comment: https://git.openjdk.org/jdk/pull/16201#issuecomment-1772264403