[PPL-devel] Re: [Yap-users] Throwing Prolog exceptions from C code

[Vitor Santos Costa]

> I have temporarily included your code into our YAP module (see near the end of
> http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/ppl/interfaces/Prolog/YAP/ppl_yap.cc?rev=1.31&content-type=text/x-cvsweb-markup
> It seems that the external predicates are not behaving as expected.
> I enclose under the signature the log of a gdb session.
> Please let me know what should I do to help in identifying the
> problem.

Hi Roberto.

First, are you using the very latest CVS version? I uploaded several
changes. Just to be sure.

If so, what is the OS/compiler you are using?

> P.S.  Very recently, a problem with the exception mechanism of GNU Prolog
>        was identified.  Roughly speaking, to make things work both GNU Prolog
>        and foreign code have to be compiled with -fomit-frame-pointer,
>        or both of them have to be compiled without using that option.
>        Does this ring a bell?
> 

Actually, I do the opposite: I always compile the interface with frame
pointer active. Strange.

Cheers,

Vitor