mirror of
https://github.com/microsoft/debugpy.git
synced 2025-12-23 08:48:12 +00:00
c6cee270ca
* Minor cleanup * Reverse the direction used by enable attach internals. * Handle occasional Invalid argument
113 lines
3.6 KiB
Python
113 lines
3.6 KiB
Python
# Copyright (c) Microsoft Corporation. All rights reserved.
|
|
# Licensed under the MIT License. See LICENSE in the project root
|
|
# for license information.
|
|
|
|
from __future__ import absolute_import, division, print_function, unicode_literals
|
|
|
|
"""Various means of communication with the debuggee."""
|
|
|
|
import threading
|
|
import socket
|
|
|
|
from ptvsd.common import fmt, log, messaging, sockets
|
|
from tests.timeline import Request, Response
|
|
|
|
|
|
class BackChannel(object):
|
|
TIMEOUT = 20
|
|
|
|
def __init__(self, session):
|
|
self.session = session
|
|
self.port = None
|
|
self._established = threading.Event()
|
|
self._socket = None
|
|
self._server_socket = None
|
|
|
|
def __str__(self):
|
|
return fmt("{0}.backchannel", self.session.debuggee_id)
|
|
|
|
def listen(self):
|
|
self._server_socket = sockets.create_server("127.0.0.1", 0, self.TIMEOUT)
|
|
_, self.port = self._server_socket.getsockname()
|
|
self._server_socket.listen(0)
|
|
|
|
def accept_worker():
|
|
log.info(
|
|
"Listening for incoming connection from {0} on port {1}...",
|
|
self,
|
|
self.port,
|
|
)
|
|
|
|
try:
|
|
self._socket, _ = self._server_socket.accept()
|
|
except socket.timeout:
|
|
raise log.exception("Timed out waiting for {0} to connect", self)
|
|
|
|
self._socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
|
|
log.info("Incoming connection from {0} accepted.", self)
|
|
self._setup_stream()
|
|
|
|
accept_thread = threading.Thread(
|
|
target=accept_worker, name=fmt("{0} listener", self)
|
|
)
|
|
accept_thread.daemon = True
|
|
accept_thread.start()
|
|
|
|
def _setup_stream(self):
|
|
self._stream = messaging.JsonIOStream.from_socket(self._socket, name=str(self))
|
|
self._established.set()
|
|
|
|
def receive(self):
|
|
self._established.wait()
|
|
return self._stream.read_json()
|
|
|
|
def send(self, value):
|
|
self.session.timeline.unfreeze()
|
|
self._established.wait()
|
|
t = self.session.timeline.mark(("sending", value))
|
|
self._stream.write_json(value)
|
|
return t
|
|
|
|
def close(self):
|
|
if self._socket:
|
|
log.debug("Closing {0} socket of {1}...", self, self.session)
|
|
try:
|
|
self._socket.shutdown(socket.SHUT_RDWR)
|
|
except Exception:
|
|
pass
|
|
self._socket = None
|
|
|
|
if self._server_socket:
|
|
log.debug("Closing {0} server socket of {1}...", self, self.session)
|
|
try:
|
|
self._server_socket.shutdown(socket.SHUT_RDWR)
|
|
except Exception:
|
|
pass
|
|
self._server_socket = None
|
|
|
|
|
|
class ScratchPad(object):
|
|
def __init__(self, session):
|
|
self.session = session
|
|
|
|
def __getitem__(self, key):
|
|
raise NotImplementedError
|
|
|
|
def __setitem__(self, key, value):
|
|
"""Sets debug_me.scratchpad[key] = value inside the debugged process.
|
|
"""
|
|
|
|
stackTrace_responses = self.session.all_occurrences_of(
|
|
Response(Request("stackTrace"))
|
|
)
|
|
assert (
|
|
stackTrace_responses
|
|
), 'scratchpad requires at least one "stackTrace" request in the timeline.'
|
|
stack_trace = stackTrace_responses[-1].body
|
|
frame_id = stack_trace["stackFrames"][0]["id"]
|
|
|
|
log.info("{0} debug_me.scratchpad[{1!r}] = {2!r}", self.session, key, value)
|
|
expr = fmt("__import__('debug_me').scratchpad[{0!r}] = {1!r}", key, value)
|
|
self.session.request(
|
|
"evaluate", {"frameId": frame_id, "context": "repl", "expression": expr}
|
|
)
|