I'm getting segfaults when calling a dbus method inside a thread. This is my scenario: I have a program Service1 that exposes a method test. A second program Service2 exposes a method expose. As this method does some serious numerical computation, I pass some params from expose to a running thread reader. This thread, in turn, calls the method test of Service1 when it ends its work. I'm geting segfaults in last dbus call.
The code:
# Service1.py class Service1(Object): def __init__(self, bus): name = BusName('com.example.Service1', bus) path = '/' super(Service1, self).__init__(name, path) @method(dbus_interface='com.example.Service1', in_signature='s', out_signature='s') def test(self, test): print 'test being called' return test dbus_loop = DBusGMainLoop() dsession = SessionBus(mainloop=dbus_loop) loop = gobject.MainLoop() gobject.threads_init() im = Service1(dsession) loop.run() # Service2.py dbus_loop = DBusGMainLoop() dsession = SessionBus(mainloop=dbus_loop) class Service2(Object): def __init__(self, bus): name = BusName('com.example.Service2', bus) super(Service2, self).__init__(name, '/') self.queue = Queue() self.db = bus.get_object('com.example.Service1', '/') self.dbi = dbus.Interface(self.db, dbus_interface='com.example.Service1') @method(dbus_interface='com.example.Service2', in_signature='', out_signature='') def expose(self): print 'calling expose' self.queue.put(('params',)) def reader(self): while True: val = self.queue.get() dd = self.dbi.test('test') print dd self.queue.task_done() gobject.threads_init() loop = gobject.MainLoop() im = Service2(dsession) reader = threading.Thread(target=im.reader) reader.start() loop.run() To test, run Service1.py, Service2.py and later this snippet:
dbus_loop = DBusGMainLoop() session = SessionBus(mainloop=dbus_loop) proxy = session.get_object('com.example.Service2', '/') test_i = dbus.Interface(proxy, dbus_interface='com.example.Service2') test_i.expose() Service2.py should crash after running this code a few times. But why?