[jdk20] RFR: 8300275: SegmentScope.isAccessibleBy returning incorrect values

[Jorn Vernee]

On Tue, 17 Jan 2023 18:30:16 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> The implementation of MemorySessionImpl::isAccessibleBy is incorrect, and ends up always returning `false` for scopes associated with shared arenas.
> This patch rectifies that, and adds some tests.

Marked as reviewed by jvernee (Reviewer).

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PR: https://git.openjdk.org/jdk20/pull/110