[foreign-memaccess+abi] RFR: 8302556: Find better way to create unsafe native segments [v3]

[Jorn Vernee]

On Wed, 15 Feb 2023 19:08:18 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> Yeah, I think that might be better as semantics in general. If the attach fails, don't leak, and run the cleanup action.
>
> Not super sure how to specify this though - e.g. should we say that the cleanup is always run when the method completes abnormally? Possible failure causes are:
> * the scope is no longer alive (this is what we care about)
> * the size is negative
> * the method is called on a segment that is not native
> * the method is called and restricted access is not enabled.
> 
> Note 100% sure *when* we should say we would attempt to run the cleanup action. Kind of tempted leave it as is.

Ok, probably better to leave it as is for now.

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PR: https://git.openjdk.org/panama-foreign/pull/797