RFR: 8344912: Sharpen the return type of various internal methods in jdk.internal.foreign [v2]

[Quan Anh Mai]

On Sat, 23 Nov 2024 17:27:43 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Quan Anh Mai has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
>> 
>>   sharpen the return types of various FFM internal methods
>
> I see this patch is in 2 parts:
> 1. Move of `AbstractMemorySegmentImpl::sessionImpl` to `scope` (a covariant override).  This involves a lot of usage updates.
> 2. More specific return types for many other methods.
> 
> Should these 2 be in 2 patches, as 1 has a lot of renaming changes?

@liach Yes you are right, I have reverted the `scope` cleanup part.

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PR Comment: https://git.openjdk.org/jdk/pull/22344#issuecomment-2495555588