[Windows|Arm32] Native varargs unsupported by the platform

[jashook]

This is an issue to track specifically arm32 Windows not supporting native varargs __arglist and Pinvokes to va_list functions.

See https://github.com/dotnet/coreclr/issues/18377 for information regarding the codegen bring-up on the platform.

category:reach
theme:varargs
skill-level:expert
cost:medium

[jkotas]

Windows Arm32 is no longer supported.

[BrianBohe]

@jkotas Test src/tests/JIT/Directed/PREFIX/unaligned/1/arglist_Target_ARM.ilproj is disabled but after merging JIT\Directed, the ilproj filename changed got scheduled and is actually passing. I guess we should either remove the test or enable it back. What is the policy here?

[BrianBohe]

Same with JIT/Directed/PREFIX/unaligned/4/arglist_Target_ARM

[BrianBohe]

Again here

[BrianBohe]

I am not sure whether this one is related also, but was skip for windows and non-windows (its analogous target TargetUnix)

[jkotas]

What is the policy here?

vararg tests should be running on Windows CoreCLR only. vararg tests should be disabled for NativeAOT, Mono and all non-Windows platforms.

[BrianBohe]

@jkotas Should we leave the test for non-windows as disabled in case this change in the future then?

[jkotas]

Yes, these tests should remain disabled for non-Windows.