RFR: 8357919: Arena::allocate returns segments with address zero if the segment length is zero after JDK-8345687

Wed May 28 10:33:54 UTC 2025

On Wed, 28 May 2025 09:06:57 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> After https://bugs.openjdk.org/browse/JDK-8345687 was integrated, zero-length segments always have an address of zero. This may cause problems in certain native methods that can receive segments and/or buffers derived from segments.
> 
> This PR also guards for overflow for extremely large allocation requests.

Some history: https://github.com/openjdk/panama-foreign/pull/650

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PR Comment: https://git.openjdk.org/jdk/pull/25485#issuecomment-2915815875