catching exception in gdb

catching exception in gdb

[Alain Magloire]

Bonjour

  As suggested in the gdb doc, I was doing some hackish stuff in gdb-5.x to get catching exception working
in the eclipse CDT IDE.  Using the C++ ABI and putting a "hidden" breakpoint in the "__cxa_xxx" functions.
So far so good, but once stop how to extract the class deep in the internal of the ABI.
I could not fine any ABI functions to do this nor walking through the arguments.

Any suggestions ?

gdb-6.x commands
  catch throw <exceptname>  - a particular exception, when thrown
  catch catch <exceptname>  - a particular exception, when caught
do not seem to work

(gdb) catch catch Size
Junk at end of arguments. 

Re: catching exception in gdb

[Daniel Jacobowitz]

On Thu, Jul 08, 2004 at 06:43:17PM -0400, Alain Magloire wrote:
> 
> Bonjour
> 
>   As suggested in the gdb doc, I was doing some hackish stuff in gdb-5.x to get catching exception working
> in the eclipse CDT IDE.  Using the C++ ABI and putting a "hidden" breakpoint in the "__cxa_xxx" functions.
> So far so good, but once stop how to extract the class deep in the internal of the ABI.
> I could not fine any ABI functions to do this nor walking through the arguments.
> 
> Any suggestions ?
> 
> gdb-6.x commands
>   catch throw <exceptname>  - a particular exception, when thrown
>   catch catch <exceptname>  - a particular exception, when caught
> do not seem to work
> 
> (gdb) catch catch Size
> Junk at end of arguments. 

You can do it with the runtime type information, but I never got around
to implementing it.  It's fairly simple.

"catch catch" and "catch throw" only work without arguments at the
moment.

-- 
Daniel Jacobowitz

Re: catching exception in gdb

[Alain Magloire]

> 
> On Thu, Jul 08, 2004 at 06:43:17PM -0400, Alain Magloire wrote:
> > 
> > Bonjour
> > 
> >   As suggested in the gdb doc, I was doing some hackish stuff in gdb-5.x to get catching exception working
> > in the eclipse CDT IDE.  Using the C++ ABI and putting a "hidden" breakpoint in the "__cxa_xxx" functions.
> > So far so good, but once stop how to extract the class deep in the internal of the ABI.
> > I could not fine any ABI functions to do this nor walking through the arguments.
> > 
> > Any suggestions ?
> > 
> > gdb-6.x commands
> >   catch throw <exceptname>  - a particular exception, when thrown
> >   catch catch <exceptname>  - a particular exception, when caught
> > do not seem to work
> > 
> > (gdb) catch catch Size
> > Junk at end of arguments. 
> 
> You can do it with the runtime type information, but I never got around
> to implementing it.  It's fairly simple.
> 

Sir ... You have my complete attention.
I like the sound of "it's fairly simple" ...
But I've learned the hard way, nothing is simple when dealing with gdb 8-).
So any good pointers ... been hamering away typecasting pointers to get the damn clazz name ... no go.

> "catch catch" and "catch throw" only work without arguments at the
> moment.
> 

Noted.