RFR: 8343394: Make MemorySessionImpl.state a stable field [v4]

[Maurizio Cimadamore]

On Mon, 4 Nov 2024 10:12:47 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> I'm dubious about this. 

NVM, I see it now -`sharedSessionAlreadyAcquired` uses a `getVolatile` (which has stronger semantics), so we're in the clear.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21810#discussion_r1827588045