Re: [Caml-list] Toplevel crashes when trying to call external functions

[Damien Doligez <damien.doligez@inria.fr>]

On Jul 11, 2004, at 20:58, Andy Yang wrote:

> value zchaff_InitManager(void)
> {
>   CAMLparam0();
>   CAMLlocal1(val);
>   void* solver = SAT_InitManager();
>   val = copy_int32((int)solver);
>   cout<<"solver = "<<hex<<solver<<endl;
>   CAMLreturn ( val );
> }
>
> void zchaff_ReadCnf(value mng, value filename)
> {
>   CAMLparam2(mng, filename);
>   SAT_Manager solver = (void*)Int32_val(mng);
>   cout<<"solver = "<<hex <<solver <<endl;
>   assert(solver != NULL);
>   char * fn = String_val(filename);
>   cout<<"file = "<<fn <<endl;
>   read_cnf(solver, fn);
>   CAMLreturn0;
> }

This code looks OK.  How did you declare these two functions on
the OCaml side of things?

> Thus I should follows ocaml's Tag rules. However, the
> problem still exists. Tracing with gdb, I noticed that
> the toplevel still crashes in function obj_tag.

Sounds like the toplevel is trying to pretty-print one of your
values.

-- Damien

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