[Vm-dev] Alien on Spur and "el capitan"?

[Nicolas Cellier]

I've changed many of these in my experimental branch when trying to remove
lot of UB - but it's not up to date with latest Eliot .oscog versions...

I'd like we review some of these changes, but only if Eliot is ready, he
has many things cooking already.

http://smalltalkhub.com/mc/nice/NiceVMExperiments/main

2015-10-19 18:31 GMT+02:00 Esteban Lorenzano <estebanlm at gmail.com>:

>
> Hi,
>
> Does anyone tested Alien on Spur and "El capitan"? specifically callbacks?
> For me, a completely broken :(
>
> 1) this structure (in maybeInlinePositive32BitIntegerFor: and others):
>
> (integerValue >= 0
> and: [objectMemory isIntegerValue: integerValue]) ifTrue:
> [^objectMemory integerObjectOf: integerValue].
>
> Does not works if “integer value” is an unsigned long, because compiler
> assumes it will always be true, then remove the if, then answers a wrong
> value.
>
> 2) assertCStackWellAligned always fail. No idea why because if does not
> says anything, just jmp back to the regular flow.
>
> 3) finally, ceCaptureCStackPointers also fails… this can be because (2)
> or because other reasons (it also jmps back so no clue) (method
> generateCaptureCStackPointers: clarifies is a hack, so I suppose it stopped
> to work).
>
> I guess solution of (1) is easy: argument number just has to be a sqLong
> instead an unsigned long.
>
> But for 2 and 3 I have no idea where to start.
>
> Does anyone has an idea?
>
> Esteban
>
>
>
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