RFR: 8323122: AArch64: Increase itable stub size estimate

[Yude Lin]

On Mon, 15 Jan 2024 16:09:46 GMT, Evgeny Astigeevich <eastigeevich at openjdk.org> wrote:

>> @theRealAph Do you mind sponsoring this change? Thank you.
>
> @linade This is not the first time estimates are updated. JDK-8207343 was implemented to automate vtable/itable stub size calculation. I think it needs improvements. I created JDK-8323741.

@eastig Thank you for reviewing. It seems to me that the size calculation can not be easily automated. But the overflow prevention might be, by somehow relocating the stubs (not sure if it's common or possible in hotspot).

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PR Comment: https://git.openjdk.org/jdk/pull/17336#issuecomment-1893023368