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# -*- coding: utf-8 -*-
# Copyright © 2013-2015 B. Clausius <barcc@gmx.de>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys, os
import multiprocessing.connection
import select
from gi.repository import GObject
from gi.repository import GLib
from gi.repository import Vte
from .helper import ConnectHelper
DIRNAME = os.path.dirname(__file__)
AUTHKEY = b'Wrtlprmft'
class Listener (multiprocessing.connection.Listener):
def accept(self, protocol):
from multiprocessing.reduction import ForkingPickler
obj = multiprocessing.connection.Listener.accept(self)
def dumps(obj):
return ForkingPickler.dumps(obj, protocol=protocol)
def loads(buf):
return ForkingPickler.loads(buf)
return multiprocessing.connection.ConnectionWrapper(obj, dumps, loads)
class PythonDebugger (GObject.Object, ConnectHelper):
__gsignals__ = {
'stack-changed': (GObject.SignalFlags.RUN_FIRST, None, (object, bool)),
'break-changed': (GObject.SignalFlags.RUN_FIRST, None, (object,)),
'exited': (GObject.SignalFlags.RUN_FIRST, None, ()),
}
dbg_cmd = ['python', os.path.join(DIRNAME, 'run_pdb.py')]
pickle_protocol = 2
def __init__(self, terminal):
GObject.Object.__init__(self)
ConnectHelper.__init__(self)
self.debugger_pid = None
self.watchid = None
self.filename = None
self.connection = None
self.terminal = terminal
self.connectx(self.terminal, 'child-exited', self.on_terminal_child_exited)
running = property(lambda self: self.debugger_pid)
def deactivate(self):
self.disconnect_all()
if self.watchid is not None:
GLib.source_remove(self.watchid)
if self.running:
self.quit()
if self.connection is not None:
self.connection.close()
self.connection = None
self.terminal = None
def start(self, filename, args, workingdir):
assert self.debugger_pid is None
self.filename = filename
listener = Listener(family='AF_UNIX', authkey=AUTHKEY)
command = self.dbg_cmd + [listener.address, self.filename]
try:
fork = self.terminal.fork_command_full
except AttributeError:
fork = self.terminal.spawn_sync
self.debugger_pid = fork(Vte.PtyFlags.DEFAULT,
None, command, None, GLib.SpawnFlags.SEARCH_PATH,
None, None)
self.connection = listener.accept(protocol=self.pickle_protocol)
channel = GLib.IOChannel(self.connection.fileno())
self.watchid = channel.add_watch(GLib.IOCondition.IN, self.on_connection_data_in)
if args:
self.chargs(args)
if workingdir:
self.chdir(workingdir)
@staticmethod
def check_execline(line):
"""Check whether specified line seems to be executable."""
line = line.lstrip()
if not line:
return False
if line[0] == '#':
return False
# Pdb does this test for docstrings, but because of false positives
# and false negatives there is no much value.
#if line.startswith(('"""', "'''")):
# return False
return True # accept line, warning: not comprehensive
def on_connection_data_in(self, channel, condition):
if self.connection is None:
self.watchid = None
return False
r, w, x = select.select([self.connection.fileno()], [], [], 0)
if not r:
print('WARNING: on_connection_data_in, but connection not ready')
self.watchid = channel.add_watch(GLib.IOCondition.IN, self.on_connection_data_in)
return False
try:
command, args = self.connection.recv()
except EOFError:
self.watchid = None
return False
if command == 'stack':
self.emit('stack-changed', *args)
elif command == 'break':
self.emit('break-changed', args)
return True
def on_terminal_child_exited(self, *unused):
self.debugger_pid = None
self.connection.close()
self.connection = None
self.emit('exited')
def step(self): self.connection.send(('step', ()))
def next(self): self.connection.send(('next', ()))
def goreturn(self): self.connection.send(('return', ()))
def run_to(self, filename, lineno):
self.connection.send(('run_to', (filename, lineno)))
def jump_to(self, filename, lineno):
self.connection.send(('jump_to', (filename, lineno)))
def cont(self, nopause=False): self.connection.send(('continue', (nopause,)))
def pause(self): self.connection.send(('pause', ()))
def bpadd(self, cnum, filename, lineno):
self.connection.send(('break', (cnum, filename, lineno)))
def bpclear(self, snum):
self.connection.send(('clear', (snum,)))
def quit(self): self.connection.send(('quit', ()))
def chargs(self, args):
self.connection.send(('chargs', args))
def chdir(self, workingdir):
self.connection.send(('chdir', (workingdir,)))
def inspect(self, keys):
self.connection.send(('inspect', keys))
class Python3Debugger (PythonDebugger):
dbg_cmd = ['python3', os.path.join(DIRNAME, 'run_pdb.py')]
pickle_protocol = 4 if sys.version_info[:2] >= (3, 4) else 3
debuggers = {
'python': PythonDebugger,
'python3': Python3Debugger,
#'application/x-executable': GNUProjectDebugger,
}
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