RFR: 8286825: Linker naming cleanup

[Jorn Vernee]

On Wed, 18 May 2022 16:54:06 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

> This patch is a batch naming cleanup for the foreign linker implementation.
> 
> The naming changes are as follows:
> 
>   - ProgrammableInvoker -> DowncallLinker
>   - ProgrammableUpcallHandler -> UpcallLinker
>   - 'native invoker' -> 'downcall stub'
>   - 'optimzed entry blob' -> 'upcall stub'
>   - OptimizedEntryBlob -> UpcallStub
>   - optimized_entry_frame -> upcall_stub_frame
> 
> Then renaming of some hotspot files:
> 
>   - universalNativeInvoker* -> downcallLinker*
>   - universalUpcallHandler* -> upcallLinker*
>   - foreign_globals* -> foreignGlobals* (to match existing convention)
>   
> Method, field, and other variable names are also adjusted accordingly.

Addressed now. I also noticed some names in strings that weren't updated yet. Updated those as well.

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PR: https://git.openjdk.java.net/jdk/pull/8777