Debug the Debugger

Debug the Debugger

[Markus Deuling]

Hi,

I try debugging gdb with gdb. GDB Internals Manual (19.2, p.96) says "The info command, when executed without a subcommand in a GDB being debugged by gdb, will pop you backup to the top leve gdb."

But it doesn't :-(

Has the mechanism changed? How do I switch back to my toplevel gdb to set some breakpoints etc. ?



Regards,
Markus

-- 
Markus Deuling
GNU Toolchain for Linux on Cell BE
deuling@de.ibm.com 

Re: Debug the Debugger

[Paul Koning]

>>>>> "Markus" == Markus Deuling <deuling@de.ibm.com> writes:

 Markus> Hi, I try debugging gdb with gdb. GDB Internals Manual (19.2,
 Markus> p.96) says "The info command, when executed without a
 Markus> subcommand in a GDB being debugged by gdb, will pop you
 Markus> backup to the top leve gdb."

 Markus> But it doesn't :-(

 Markus> Has the mechanism changed? How do I switch back to my
 Markus> toplevel gdb to set some breakpoints etc. ?

I always just hit control/C.

  paul

Re: Debug the Debugger

[Daniel Jacobowitz]

On Wed, Jan 10, 2007 at 08:47:24PM +0100, Markus Deuling wrote:
> Hi,
> 
> I try debugging gdb with gdb. GDB Internals Manual (19.2, p.96) says "The 
> info command, when executed without a subcommand in a GDB being debugged by 
> gdb, will pop you backup to the top leve gdb."
> 
> But it doesn't :-(

This relies on a breakpoint on info_command.  The gdbinit file in the
gdb object directory sets that up.  If you run GDB from anywhere else,
you won't get it.

Like Paul, I usually use C-c.

-- 
Daniel Jacobowitz
CodeSourcery

Re: Debug the Debugger

[Markus Deuling]

Daniel Jacobowitz schrieb:
> On Wed, Jan 10, 2007 at 08:47:24PM +0100, Markus Deuling wrote:
>> Hi,
>>
>> I try debugging gdb with gdb. GDB Internals Manual (19.2, p.96) says "The 
>> info command, when executed without a subcommand in a GDB being debugged by 
>> gdb, will pop you backup to the top leve gdb."
>>
>> But it doesn't :-(
> 
> This relies on a breakpoint on info_command.  The gdbinit file in the
> gdb object directory sets that up.  If you run GDB from anywhere else,
> you won't get it.
> 
> Like Paul, I usually use C-c.
> 

Aha ?!? Ok, interesting idea. Well, I think I'll take the C-c  :-)

Thank you both.


Regards,
Markus

-- 
Markus Deuling
GNU Toolchain for Linux on Cell BE
deuling@de.ibm.com 

Re: Debug the Debugger

[Michael Snyder]

On Wed, 2007-01-10 at 20:58 +0100, Markus Deuling wrote:
> Daniel Jacobowitz schrieb:
> > On Wed, Jan 10, 2007 at 08:47:24PM +0100, Markus Deuling wrote:
> >> Hi,
> >>
> >> I try debugging gdb with gdb. GDB Internals Manual (19.2, p.96) says "The 
> >> info command, when executed without a subcommand in a GDB being debugged by 
> >> gdb, will pop you backup to the top leve gdb."
> >>
> >> But it doesn't :-(
> > 
> > This relies on a breakpoint on info_command.  The gdbinit file in the
> > gdb object directory sets that up.  If you run GDB from anywhere else,
> > you won't get it.
> > 
> > Like Paul, I usually use C-c.
> > 
> 
> Aha ?!? Ok, interesting idea. Well, I think I'll take the C-c  :-)

And in case that doesn't work, I habitually set a breakpoint on
"help_command".  Then you just say "help foo", and you're back in
the top-level debugger.