Improve debugging of thread and other leaks

- Add basethread.BaseThread that all threads outside of test suites should use
- Add a signal handler to mitmproxy, mitmdump and mitmweb that dumps resource
information to screen when SIGUSR1 is received.
- Improve thread naming throughout to make thread dumps understandable

1 files changed, 6 insertions, 3 deletions

diff --git a/mitmproxy/controller.py b/mitmproxy/controller.py
index 084702a6..898be3bc 100644
--- a/mitmproxy/controller.py
+++ b/mitmproxy/controller.py
@@ -5,8 +5,10 @@ import threading
 
 from six.moves import queue
 
+from netlib import basethread
 from mitmproxy import exceptions
 
+
 Events = frozenset([
     "clientconnect",
     "clientdisconnect",
@@ -95,12 +97,13 @@ class Master(object):
         self.should_exit.set()
 
 
-class ServerThread(threading.Thread):
+class ServerThread(basethread.BaseThread):
     def __init__(self, server):
         self.server = server
-        super(ServerThread, self).__init__()
         address = getattr(self.server, "address", None)
-        self.name = "ServerThread ({})".format(repr(address))
+        super(ServerThread, self).__init__(
+            "ServerThread ({})".format(repr(address))
+        )
 
     def run(self):
         self.server.serve_forever()