On Tue, May 25, 2010 at 8:25 PM, Romain Beauxis <toots@rastageeks.org> wrote:
>        Hi all !
>
> I am trying to understand some segfault that we observe and I have a question
> about the relationships between bigarrays in C and the Gc.
>
> We have the following code:
>
> static frame *frame_of_value(value v, frame *f)
> {
>  f->data = Caml_ba_data_val(Field(v,0));
>  f->width = Int_val(Field(v,1));
>  f->height = Int_val(Field(v,2));
>  f->stride = Int_val(Field(v,3));
>
>  return f;
> }

Are you sure that you correctly calculate the bigarray size in your
Caml code? Why not just use struct caml_ba_array fields? I suspect
it's not GC problem but just a buffer overrun in memset().

- Dmitry Bely