added secret thread_dump command in cli server for debug

chatbridge/impl/cli/cli_server.py

@@ -1,4 +1,6 @@
+import threading
 import time
+import traceback
 
 from chatbridge.core.config import ServerConfig
 from chatbridge.core.network.basic import Address
@@ -17,6 +19,19 @@ class CLIServerConfig(ServerConfig):
 CHAT_LOGGING_FILE = 'chat.log'
 
 
+def thread_dump() -> str:
+	from sys import _current_frames
+	lines = []
+	name_map = dict([(thread.ident, thread.name) for thread in threading.enumerate()])
+	for thread_id, stack in _current_frames().items():
+		lines.append("# Thread {} ({})".format(name_map.get(thread_id, 'unknown'), thread_id))
+		for filename, lineno, name, line in traceback.extract_stack(stack):
+			lines.append('  File "{}", line {}, in {}'.format(filename, lineno, name))
+			if line:
+				lines.append('    {}'.format(line.strip()))
+	return '\n'.join(lines)
+
+
 class CLIServer(ChatBridgeServer):
 	def on_chat(self, sender: str, content: ChatPayload):
 		if config.show_chat:
@@ -52,6 +67,8 @@ def console_loop(self):
 			elif text == 'debug off':
 				self.logger.set_debug_all(False)
 				self.logger.info('Debug logging off')
+			elif text == 'thread_dump':
+				self.logger.info(thread_dump())
 			else:
 				self.logger.info('stop": stop the server')
 				self.logger.info('stop <client_name>": stop a client')