Commit d36093ef by Julien Muchembled

Example of neo/debug.py script starting a debugger on RTMIN+2 signal

1 parent 07efb0ca
"""Example of script starting a debugger on RTMIN+2 signal
The pdb is launched in a separate thread in order not to trigger timeouts.
The prompt is accessible through network in case that the process is daemonized:
$ socat READLINE TCP:127.0.0.1:54930
> neo/debug.py(63)pdb()
-> app # this is Application instance
(Pdb) app
<neo.master.app.Application object at 0x1fc9750>
"""
if 1:
import socket, sys, threading
#from neo.lib.debug import getPdb
from pdb import Pdb as getPdb
class Socket(object):
def __init__(self, socket):
self._socket = socket
self._buf = ''
def write(self, data):
self._socket.send(data)
def readline(self):
recv = self._socket.recv
data = self._buf
while True:
i = 1 + data.find('\n')
if i:
self._buf = data[i:]
return data[:i]
d = recv(4096)
data += d
if not d:
self._buf = ''
return data
def flush(self):
pass
def closed(self):
self._socket.setblocking(0)
try:
self._socket.recv(0)
return True
except socket.error, (err, _):
if err != errno.EAGAIN:
raise
self._socket.setblocking(1)
return False
def pdb(app):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
s.bind(('127.0.0.1', 0))
s.listen(0)
print 'Listening to %u' % s.getsockname()[1]
_socket = Socket(s.accept()[0])
finally:
s.close()
getPdb(stdin=_socket, stdout=_socket).set_trace()
app # this is Application instance
f = sys._getframe(3)
try:
while f.f_code.co_name != 'run' or \
f.f_locals.get('self').__class__.__name__ != 'Application':
f = f.f_back
threading.Thread(target=pdb, args=(f.f_locals['self'],)).start()
finally:
del f
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