[Vm-dev] InterpreterProxy->getStackPointer is null

[Eliot Miranda]

Igor,

   this was fixed in r2440 of
http://www.squeakvm.org/svn/squeak/branches/Cog/platforms/Cross/vm/sqVirtualMachine.c,
along with marshalling in the Alien plugin for stack-grows-down Stack and
Cog VMs.

On Wed, Aug 3, 2011 at 9:17 AM, Igor Stasenko <siguctua at gmail.com> wrote:

>
> I just found that a pointer to this function is null.
> Means that if you will use
> interpreterProxy->getStackPointer()
> in plugin, you will crash VM.
>
> Could it be that it declared twice in sqVirtualMachine.c ?
>
> ...
> sqInt getStackPointer(void);  /* Newsqueak FFI */
> void *startOfAlienData(sqInt);
> usqInt sizeOfAlienData(sqInt);
> sqInt signalNoResume(sqInt);
>
> #if VM_PROXY_MINOR > 8
> sqInt getStackPointer(void);  /* Alien FFI */
> ...
>
> (at least this code looks suspicious)
>
> and why at assignment point it does conversions?
> VM->getStackPointer     = (sqInt *(*)(void))getStackPointer;
>
> while rest of functions don't require them?
>
> In header it declared as:
>  sqInt *(*getStackPointer)(void);
>
>
>
> NBInterpreterProxy majorVersion 1
> NBInterpreterProxy minorVersion 12
>
> (means that it should be there :)
>
> --
> Best regards,
> Igor Stasenko AKA sig.
>



-- 
best,
Eliot
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