RFR: Save/load nmethod without going through CodeBuffer

[Vladimir Kozlov]

On Mon, 6 Jan 2025 19:00:30 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Can you make SCnmethod as subclass of nmethod so you don't need to allocate it and copy offsets values which don't change? If it is difficult, please explain why.

I may know answer myself. It is virtual table pointer since `nmethod` class has virtual methods.

Lets go with your SCnmethod for now.

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PR Comment: https://git.openjdk.org/leyden/pull/27#issuecomment-2576032292