pdbme - remote active debugger based on rpdb

This is active fork of https://github.com/tamentis/rpdb.

Rpdb is a wrapper around pdb that re-routes stdin and stdout to a socket handler.

Pdbme is Rpdb, which is active. Which means, that while Rpdb open port and waits until you connect to this port, Pdbme connects to your port.

So, in other words, you open pdbme-cli tool, ask your app "pdb me please" and your app will pdb you :).

Why active?

Rpdb opens debugger pon port (default 4444), but it has many drawbacks. Eg - it cannot be used in mutlithreaded or multiprocessing application. Even in non-parallel app, port can be occupied a little while after closing it and app will break trying to open it again.

Calling your terminal sounds way better way. It's useful when you want to debug app which can break simultaneously more than once in a time, and passive mode will refuse to open port 4444 again.

Solution to the problem is:

# default host is 127.0.0.1 and default port is 4444
import pdbme; pdbme.set_trace()

or, in more complex case, eg. when it's running in other host, in your docker, or sth like that

import pdbme
pdbme.set_trace(host='192.168.1.120', port=12345)

You should have pdbme-cli running on other side of your communication.

pdbme-cli

pdbme-cli is a simple tool, using tmux, tcpwrapper and socat to accept incoming connections and spawn tmux session for each incoming breakpoint.

• tcpwrapper comes from https://cr.yp.to/ucspi-tcp.html (available in many distros and in MacOS brew)
• socat - http://www.dest-unreach.org/socat/

Installation in CPython (standard Python)

pip install pdbme

or

pip install git+https://github.com/mahomahomaho/pdbme

Trigger rpdb with signal

set_trace() can be triggered at any time by using the TRAP signal handler. This allows you to debug a running process independantly of a specific failure or breakpoint::

import pdbme
pdbme.handle_trap()

# As with set_trace, you can optionally specify addr and port
rpdb.handle_trap(host="0.0.0.0", port=4441)

Calling handle_trap will overwrite the existing handler for SIGTRAP if one has already been defined in your application.

Author(s)

Łukasz Mach maho@pagema.net - http://pagema.net/

based on work of rpdb author: Bertrand Janin b@janin.com - http://tamentis.com/

and rpdbs contributors: (chronological, latest first):

• Cameron Davidson-Pilon - @CamDavidsonPilon
• Pavel Fux - @fuxpavel
• Ken Manheimer - @kenmanheimer
• Steven Willis - @onlynone
• Jorge Niedbalski R niedbalski@gmail.com
• Cyprien Le Pannérer clepannerer@edd.fr
• k4ml kamal.mustafa@gmail.com
• Sean M. Collins sean@coreitpro.com
• Sean Myers sean.myers@redhat.com