Re: [Sbcl-devel] [Sbcl-commits] master: x86-64, struct-by-value: correctly pass small structs on the stack

[Stas B. <sta...@gm...>]

The struct-by-value issues keep coming and coming, I'm already tired
of fixing them, have no strength to add proper tests.
And it also needs to test for over-reading input structures, I have
some scaffolding from the time of writing simd routines which mmaps
data at the edges of a protected region.

On Thu, Apr 23, 2026 at 11:17 PM Christophe Rhodes <cs...@ca...> wrote:
>
> Stas Boukarev <sta...@gm...> writes:
>
> > I just send c-call.lisp to various free LLMs and say "find bugs here".
> > And also make them generate test cases.
> > I didn't include any specific test because they won't find new
> > problems.
>
> Sure, but they'll help the day someone wants to make struct-by-value
> work on platforms that don't support it yet.  (Maybe in this grand
> future that's less necessary because we'll just send riscv's c-call to
> some LLM and say "now implement the struct-by-value ABI please".)
>
> > A test that performs an exhaustive combination of different foreign
> > types is needed.
> > But I'm not eager to make that yet.
>
> ... that would work too, sure.  I can be patient.
>
> Thanks,
>
> Christophe