[Vm-dev] Building stack VM on windows fails

[Eliot Miranda]

Hi Igor,

On Thu, Jun 30, 2011 at 11:05 AM, Igor Stasenko <siguctua at gmail.com> wrote:

>
> There are two undefined symbols:
>
>
> Linking C executable results/StackVM.exe
> Creating library file: results/libStackVM.dll.a
> CMakeFiles/StackVM.dir/objects.a(gcc3x-interp.c.obj): In function
> `returnAsThrou
> ghCallbackContext':
> c:/hudson/workspace/StackWin32/cog/src/vm/gcc3x-interp.c:34699: undefined
> refere
> nce to `siglongjmp'
> CMakeFiles/StackVM.dir/objects.a(sqWin32Prefs.c.obj): In function
> `CreatePrefsMe
> nu':
> c:/hudson/workspace/StackWin32/cog/platforms/win32/vm/sqWin32Prefs.c:374:
> undefi
> ned reference to `recordPrimTraceFunc'
>

You need to generate the following defines at the start of interpreter C
file. See e.g. gcc3x-cointerp.c.

/*
 * Define sigsetjmp and siglongjmp to be the most minimal setjmp/longjmp
available on the platform.
 */
#if WIN32
# define sigsetjmp(jb,ssmf) setjmp(jb)
# define siglongjmp(jb,v) longjmp(jb,v)
#else
# define sigsetjmp(jb,ssmf) _setjmp(jb)
# define siglongjmp(jb,v) _longjmp(jb,v)
#endif


In Cog setjmp is used a lot to jump form machine code back into the
interpreter, so choosing the most minimal setjmp/longjmp is important.  Alas
both Win32 and Unix have their own different ideas as to what a minimal
setjmp/longjmp is (see sigsetjmp(3) on unix).  In my VMMaker the defines are
generated in CoInterpreter class>>preambleCCode and NewspeakInterpreter
class>preambleCCode.  Looks like the CoInterpreter one needs moving up to
StackInterpreter right?



>
>  - siglongjmp
> (it is found however in cointerp.c so JIT-flavored VMs don't have this
> problem, but not stack ones)
>
>
> The recordPrimTraceFunc() are used like following:
>
> #if STACKVM
> extern sqInt recordPrimTraceFunc();
> #endif
> ...
> #if STACKVM
>    if (recordPrimTraceFunc())
>      AppendMenu(hMenu, MF_STRING | MF_UNCHECKED, ID_DUMPPRIMLOG,
>               TEXT("Dump recent primitives"));
> #endif
>
>
> again, it is defined in cogit.h/.c but obviously not in stack
> interpreter, since stack not using cogit.
>
> Maybe you meant
> #if !STACKVM
> ?
> Then it makes sense.
>
> --
> Best regards,
> Igor Stasenko AKA sig.
>
>


-- 
best,
Eliot
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