Re: Some questions

[Mark Wielaard <mark at klomp dot org>]

Hi,

On Thu, Jul 12, 2001 at 01:04:11PM +0100, Andrew Haley wrote:
> Mark Wielaard writes:
>  > This looks a bit like the bug discussed in
>  > <http://gcc.gnu.org/ml/java/2001-05/msg00277.html>
>  > <http://gcc.gnu.org/ml/java/2001-06/msg00003.html>
>  > 
>  > Maybe the patch in those emails helps?
> 
>  > Note that I don't know exactly why it fixes the problem in that case
>  > and nobody else seems to have looked at it.
> 
> I don't think that the patch can be correct.  We need to find out why
> _Jv_FindClass returns null in this case.  I've never seen this happen.
The second email give a way to reproduce it. But the test case described
there is much to big to be practical.

>  > > How do you guys debug? Where do i have to set a breakpoint and in which
>  > > thread?
> 
> I don't understand the issue here.  Surely all that is required is to
> add a line like 
> 
> if (catch_type = NULL)
>    printf ("BANG\n");
> 
> and use gdb to put a breakpoint on that line.  Are you not familiar
> with gdb?
The issue here is indeed my unfamiliarity with gdb combined with the
huge test senario described above. If someone could describe a walkthrough
on how to (begin) debugging something like this that would be greatly
appreciated.

To be honest I always find working on/with (lib)gcj a bit intimidating
since the build process alone takes up 45 minutes on my machine (yes I
should buy something faster if I have the money :) And coming from a
java background (and some Haskell and other modern functional/logic
languages) the combination of C/C++/automake/libtool etc is really confusing.

I am willing to learn, but this will take some time :)

Cheers,

Mark
-- 
Stuff to read:
    <http://www.toad.com/gnu/whatswrong.html>
  What's Wrong with Copy Protection, by John Gilmore