[jdk20] RFR: 8299561: VaList.empty() doesn't return a list associated with the global scope

[Maurizio Cimadamore]

On Wed, 4 Jan 2023 10:49:09 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This patch fixes a long-standing conformance issue: `VaList.empty` is specified to return a `VaList` associated with the global scope, but in some platforms (Aarch64/Linux and x64/Linux) the empty list is associated with an implicit scope instead.
> 
> This doesn't make a lot of difference, given that the empty list is always stored in a static final in the underlying implementation - that said, it would be a good thing to rectify this conformance issue.

Note: on Windows/x64 and MacOS/Aarch64 the empty VaList is just a wrapper around MemorySegment.NULL which is already associated with the global scope - so nothing to fix there.

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PR: https://git.openjdk.org/jdk20/pull/82