Re: 23.0.60; gdb not running the program first time around

[robert marshall <robert.marshall@tnei.co.uk>]

Nick Roberts wrote:
>  > I've just tried
>  >     (setq gdb-many-windows t)
>  > - not used this before and apart from being faviourably impressed :-) 
>  > I've come across one problem.
>  > Our code tends to swap languages - top level is C++ which calls a c 
>  > layer which then invokes some fortran,
>  > when I get down to the fortran I get a debugger segmentation fault 
>  > immediately, I don't see this issue when gdb-many-windows is nil
>
> You're probably stretching the boundaries of Gdb a bit - it's not so good with
> C++ but it's getting better.  Also I've found that for fortran debugging, g77
> is better than gfortran as it currently generates better debug information.  I
> think gfortran is the future, however, and compiles fortran 95.
>
>   
As with other contributors to this thread I've found the c++ support to 
be fine - fortran appears dodgier.
We have some code which contains fortran linked lists where a points to 
b which points to c which points to a,
printing out a causes a loop I'll get a bug report sent when I can get 
an appropriate small example

>  > Do you want me to create a separate report for this - I assume there's a 
>  > couple of issues here a gdb one and a gdb-ui.el one?
>
> A debugger segmentation fault means a bug in Gdb, so the report should go to
> the gdb mailing list (gdb@sourceware.org).  Most users probably don't debug
> inside Emacs, so you really need to find a way to reproduce it from the
> command line.  Since it only happens with gdb-many-windows it is probably
> caused by one of the gdb commands that Emacs runs behind the user's back
> to update the extra buffers:
>
> info stack
> interpreter mi "-stack-list-locals --simple-values"
>
> If you can get to where the debugger segmentation fault occurs from the
> command line then issing these commands might trigger it.
>
>   
Is it possible to turn off the functionality of gdb-many-windows on the fly?
I think the bug I'm triggering may well be this one:
http://permalink.gmane.org/gmane.comp.gdb.bugs.discuss/4934
so I probably need to update gdb with a build from source

Robert

-- 
Robert A J Marshall,  
TNEI Services Ltd, 88-90 London Road, Manchester, M1 2PW 
Registered in England & Wales No. 03891836,
Registered office:  Milburn House, Dean Street, Newcastle upon Tyne, NE1 1LE
tel: +44 161 615 6017; fax: +44 161 615 6001; mobile: +44 7759 688384 
web: http://IPSA-Power.com