Debugging remotely via ssh login

Debugging remotely via ssh login

[ppmoore]

Hello, I wonder if anyone can help with with this one.

In our environment, we test by copying our executables to a destination
machine on our test network using scp, copy the set of source code files
that we are debugging to the same destination, and then log on to the remote
node using ssh to perform the debugging session.

I was reading in the manual about remote debugging, but the scenarios
described included debugging via a serial comm line or via a tcp port on the
remote machine. Is it possible to debug where the only access is remote
logon using ssh?

Many thanks,
Paul
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Re: Debugging remotely via ssh login

[Andreas Schwab]

ppmoore <polomora@gmail.com> writes:

> I was reading in the manual about remote debugging, but the scenarios
> described included debugging via a serial comm line or via a tcp port on the
> remote machine. Is it possible to debug where the only access is remote
> logon using ssh?

You can forward a port via the ssh connection to the remote host, and then
use this port for the debugging session.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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"And now for something completely different."

Re: Debugging remotely via ssh login

[Eli Zaretskii]

> From: Andreas Schwab <schwab@suse.de>
> Cc: gdb@sources.redhat.com
> Date: Fri, 22 Dec 2006 11:24:18 +0100
> 
> ppmoore <polomora@gmail.com> writes:
> 
> > I was reading in the manual about remote debugging, but the scenarios
> > described included debugging via a serial comm line or via a tcp port on the
> > remote machine. Is it possible to debug where the only access is remote
> > logon using ssh?
> 
> You can forward a port via the ssh connection to the remote host, and then
> use this port for the debugging session.

If someone describes this scenario in enough detail (a bit more than
the above single sentence), I'd more than happy to add it to the
manual.

TIA

Re: Debugging remotely via ssh login

[Paul Koning]

>>>>> "Eli" == Eli Zaretskii <eliz@gnu.org> writes:

 >> From: Andreas Schwab <schwab@suse.de> Cc: gdb@sources.redhat.com
 >> Date: Fri, 22 Dec 2006 11:24:18 +0100
 >> 
 >> ppmoore <polomora@gmail.com> writes:
 >> 
 >> > I was reading in the manual about remote debugging, but the
 >> scenarios > described included debugging via a serial comm line or
 >> via a tcp port on the > remote machine. Is it possible to debug
 >> where the only access is remote > logon using ssh?
 >> 
 >> You can forward a port via the ssh connection to the remote host,
 >> and then use this port for the debugging session.

 Eli> If someone describes this scenario in enough detail (a bit more
 Eli> than the above single sentence), I'd more than happy to add it
 Eli> to the manual.

Something like this:

On the target system:
$ gdbserver localhost:6666 prog args

On the host:
$ ssh -L 6666:target:6666
<log in>

then in another shell:
gdb prog
(gdb) target remote localhost:6666

The same approach works if the target debug is done via something
other than gdbserver, so long as it listens on a TCP port that is
willing to accept local (to the target) connections.

You can avoid the interaction in the ssh invocation by suitable
switches and authenticating mechanism; see the manpage for details.
But the above is the basic approach.

    paul

Re: Debugging remotely via ssh login

[Hadron]

Cant you just create a secure shell and run gdb.

You might find this interesting as I was looking into this recently.

http://www.cucy.net/lacp/archives/000024.html




ppmoore wrote:
> 
> Hello, I wonder if anyone can help with with this one.
> 
> In our environment, we test by copying our executables to a destination
> machine on our test network using scp, copy the set of source code files
> that we are debugging to the same destination, and then log on to the
> remote node using ssh to perform the debugging session.
> 
> I was reading in the manual about remote debugging, but the scenarios
> described included debugging via a serial comm line or via a tcp port on
> the remote machine. Is it possible to debug where the only access is
> remote logon using ssh?
> 
> Many thanks,
> Paul
> 

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Re: Debugging remotely via ssh login

[ppmoore]

Thanks Hadron.

I found this also, from a colleague at work, after I had posted.

Regards,
Paul



Hadron wrote:
> 
> Cant you just create a secure shell and run gdb.
> 
> You might find this interesting as I was looking into this recently.
> 
> http://www.cucy.net/lacp/archives/000024.html
> 
> 
> 
> 
> ppmoore wrote:
>> 
>> Hello, I wonder if anyone can help with with this one.
>> 
>> In our environment, we test by copying our executables to a destination
>> machine on our test network using scp, copy the set of source code files
>> that we are debugging to the same destination, and then log on to the
>> remote node using ssh to perform the debugging session.
>> 
>> I was reading in the manual about remote debugging, but the scenarios
>> described included debugging via a serial comm line or via a tcp port on
>> the remote machine. Is it possible to debug where the only access is
>> remote logon using ssh?
>> 
>> Many thanks,
>> Paul
>> 
> 
> 

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