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726 lines
28 KiB
Python
726 lines
28 KiB
Python
# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License. See LICENSE in the project root
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# for license information.
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from __future__ import annotations
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import atexit
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import os
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import sys
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import debugpy
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from debugpy import adapter, common, launcher
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from debugpy.common import json, log, messaging, sockets
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from debugpy.adapter import components, servers, sessions
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class Client(components.Component):
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"""Handles the client side of a debug session."""
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message_handler = components.Component.message_handler
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known_subprocesses: set[servers.Connection]
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"""Server connections to subprocesses that this client has been made aware of.
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"""
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class Capabilities(components.Capabilities):
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PROPERTIES = {
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"supportsVariableType": False,
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"supportsVariablePaging": False,
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"supportsRunInTerminalRequest": False,
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"supportsMemoryReferences": False,
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"supportsArgsCanBeInterpretedByShell": False,
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}
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class Expectations(components.Capabilities):
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PROPERTIES = {
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"locale": "en-US",
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"linesStartAt1": True,
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"columnsStartAt1": True,
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"pathFormat": json.enum("path", optional=True), # we don't support "uri"
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}
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def __init__(self, sock):
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if sock == "stdio":
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log.info("Connecting to client over stdio...", self)
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stream = messaging.JsonIOStream.from_stdio()
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# Make sure that nothing else tries to interfere with the stdio streams
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# that are going to be used for DAP communication from now on.
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sys.stdin = stdin = open(os.devnull, "r")
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atexit.register(stdin.close)
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sys.stdout = stdout = open(os.devnull, "w")
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atexit.register(stdout.close)
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else:
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stream = messaging.JsonIOStream.from_socket(sock)
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with sessions.Session() as session:
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super().__init__(session, stream)
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self.client_id = None
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"""ID of the connecting client. This can be 'test' while running tests."""
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self.has_started = False
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"""Whether the "launch" or "attach" request was received from the client, and
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fully handled.
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"""
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self.start_request = None
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"""The "launch" or "attach" request as received from the client.
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"""
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self._initialize_request = None
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"""The "initialize" request as received from the client, to propagate to the
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server later."""
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self._deferred_events = []
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"""Deferred events from the launcher and the server that must be propagated
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only if and when the "launch" or "attach" response is sent.
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"""
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self._forward_terminate_request = False
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self.known_subprocesses = set()
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session.client = self
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session.register()
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# For the transition period, send the telemetry events with both old and new
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# name. The old one should be removed once the new one lights up.
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self.channel.send_event(
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"output",
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{
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"category": "telemetry",
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"output": "ptvsd",
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"data": {"packageVersion": debugpy.__version__},
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},
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)
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self.channel.send_event(
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"output",
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{
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"category": "telemetry",
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"output": "debugpy",
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"data": {"packageVersion": debugpy.__version__},
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},
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)
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def propagate_after_start(self, event):
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# pydevd starts sending events as soon as we connect, but the client doesn't
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# expect to see any until it receives the response to "launch" or "attach"
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# request. If client is not ready yet, save the event instead of propagating
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# it immediately.
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if self._deferred_events is not None:
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self._deferred_events.append(event)
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log.debug("Propagation deferred.")
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else:
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self.client.channel.propagate(event)
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def _propagate_deferred_events(self):
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log.debug("Propagating deferred events to {0}...", self.client)
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for event in self._deferred_events:
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log.debug("Propagating deferred {0}", event.describe())
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self.client.channel.propagate(event)
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log.info("All deferred events propagated to {0}.", self.client)
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self._deferred_events = None
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# Generic event handler. There are no specific handlers for client events, because
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# there are no events from the client in DAP - but we propagate them if we can, in
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# case some events appear in future protocol versions.
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@message_handler
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def event(self, event):
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if self.server:
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self.server.channel.propagate(event)
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# Generic request handler, used if there's no specific handler below.
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@message_handler
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def request(self, request):
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return self.server.channel.delegate(request)
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@message_handler
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def initialize_request(self, request):
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if self._initialize_request is not None:
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raise request.isnt_valid("Session is already initialized")
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self.client_id = request("clientID", "")
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self.capabilities = self.Capabilities(self, request)
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self.expectations = self.Expectations(self, request)
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self._initialize_request = request
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exception_breakpoint_filters = [
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{
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"filter": "raised",
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"label": "Raised Exceptions",
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"default": False,
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"description": "Break whenever any exception is raised.",
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},
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{
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"filter": "uncaught",
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"label": "Uncaught Exceptions",
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"default": True,
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"description": "Break when the process is exiting due to unhandled exception.",
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},
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{
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"filter": "userUnhandled",
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"label": "User Uncaught Exceptions",
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"default": False,
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"description": "Break when exception escapes into library code.",
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},
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]
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return {
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"supportsCompletionsRequest": True,
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"supportsConditionalBreakpoints": True,
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"supportsConfigurationDoneRequest": True,
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"supportsDebuggerProperties": True,
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"supportsDelayedStackTraceLoading": True,
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"supportsEvaluateForHovers": True,
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"supportsExceptionInfoRequest": True,
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"supportsExceptionOptions": True,
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"supportsFunctionBreakpoints": True,
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"supportsHitConditionalBreakpoints": True,
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"supportsLogPoints": True,
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"supportsModulesRequest": True,
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"supportsSetExpression": True,
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"supportsSetVariable": True,
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"supportsValueFormattingOptions": True,
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"supportsTerminateRequest": True,
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"supportsGotoTargetsRequest": True,
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"supportsClipboardContext": True,
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"exceptionBreakpointFilters": exception_breakpoint_filters,
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"supportsStepInTargetsRequest": True,
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}
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# Common code for "launch" and "attach" request handlers.
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#
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# See https://github.com/microsoft/vscode/issues/4902#issuecomment-368583522
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# for the sequence of request and events necessary to orchestrate the start.
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def _start_message_handler(f):
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@components.Component.message_handler
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def handle(self, request):
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assert request.is_request("launch", "attach")
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if self._initialize_request is None:
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raise request.isnt_valid("Session is not initialized yet")
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if self.launcher or self.server:
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raise request.isnt_valid("Session is already started")
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self.session.no_debug = request("noDebug", json.default(False))
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if self.session.no_debug:
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servers.dont_wait_for_first_connection()
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self.session.debug_options = debug_options = set(
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request("debugOptions", json.array(str))
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)
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f(self, request)
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if request.response is not None:
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return
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if self.server:
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self.server.initialize(self._initialize_request)
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self._initialize_request = None
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arguments = request.arguments
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if self.launcher:
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redirecting = arguments.get("console") == "internalConsole"
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if "RedirectOutput" in debug_options:
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# The launcher is doing output redirection, so we don't need the
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# server to do it, as well.
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arguments = dict(arguments)
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arguments["debugOptions"] = list(
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debug_options - {"RedirectOutput"}
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)
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redirecting = True
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if arguments.get("redirectOutput"):
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arguments = dict(arguments)
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del arguments["redirectOutput"]
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redirecting = True
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arguments["isOutputRedirected"] = redirecting
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# pydevd doesn't send "initialized", and responds to the start request
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# immediately, without waiting for "configurationDone". If it changes
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# to conform to the DAP spec, we'll need to defer waiting for response.
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try:
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self.server.channel.request(request.command, arguments)
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except messaging.NoMoreMessages:
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# Server closed connection before we could receive the response to
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# "attach" or "launch" - this can happen when debuggee exits shortly
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# after starting. It's not an error, but we can't do anything useful
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# here at this point, either, so just bail out.
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request.respond({})
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self.session.finalize(
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"{0} disconnected before responding to {1}".format(
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self.server,
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json.repr(request.command),
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)
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)
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return
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except messaging.MessageHandlingError as exc:
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exc.propagate(request)
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if self.session.no_debug:
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self.start_request = request
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self.has_started = True
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request.respond({})
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self._propagate_deferred_events()
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return
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# Let the client know that it can begin configuring the adapter.
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self.channel.send_event("initialized")
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self.start_request = request
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return messaging.NO_RESPONSE # will respond on "configurationDone"
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return handle
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@_start_message_handler
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def launch_request(self, request):
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from debugpy.adapter import launchers
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if self.session.id != 1 or len(servers.connections()):
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raise request.cant_handle('"attach" expected')
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debug_options = set(request("debugOptions", json.array(str)))
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# Handling of properties that can also be specified as legacy "debugOptions" flags.
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# If property is explicitly set to false, but the flag is in "debugOptions", treat
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# it as an error. Returns None if the property wasn't explicitly set either way.
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def property_or_debug_option(prop_name, flag_name):
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assert prop_name[0].islower() and flag_name[0].isupper()
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value = request(prop_name, bool, optional=True)
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if value == ():
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value = None
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if flag_name in debug_options:
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if value is False:
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raise request.isnt_valid(
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'{0}:false and "debugOptions":[{1}] are mutually exclusive',
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json.repr(prop_name),
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json.repr(flag_name),
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)
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value = True
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return value
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# "pythonPath" is a deprecated legacy spelling. If "python" is missing, then try
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# the alternative. But if both are missing, the error message should say "python".
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python_key = "python"
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if python_key in request:
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if "pythonPath" in request:
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raise request.isnt_valid(
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'"pythonPath" is not valid if "python" is specified'
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)
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elif "pythonPath" in request:
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python_key = "pythonPath"
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python = request(python_key, json.array(str, vectorize=True, size=(0,)))
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if not len(python):
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python = [sys.executable]
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python += request("pythonArgs", json.array(str, size=(0,)))
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request.arguments["pythonArgs"] = python[1:]
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request.arguments["python"] = python
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launcher_python = request("debugLauncherPython", str, optional=True)
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if launcher_python == ():
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launcher_python = python[0]
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program = module = code = ()
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if "program" in request:
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program = request("program", str)
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args = [program]
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request.arguments["processName"] = program
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if "module" in request:
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module = request("module", str)
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args = ["-m", module]
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request.arguments["processName"] = module
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if "code" in request:
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code = request("code", json.array(str, vectorize=True, size=(1,)))
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args = ["-c", "\n".join(code)]
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request.arguments["processName"] = "-c"
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num_targets = len([x for x in (program, module, code) if x != ()])
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if num_targets == 0:
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raise request.isnt_valid(
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'either "program", "module", or "code" must be specified'
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)
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elif num_targets != 1:
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raise request.isnt_valid(
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'"program", "module", and "code" are mutually exclusive'
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)
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console = request(
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"console",
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json.enum(
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"internalConsole",
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"integratedTerminal",
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"externalTerminal",
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optional=True,
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),
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)
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console_title = request("consoleTitle", json.default("Python Debug Console"))
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# Propagate "args" via CLI so that shell expansion can be applied if requested.
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target_args = request("args", json.array(str, vectorize=True))
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args += target_args
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# If "args" was a single string rather than an array, shell expansion must be applied.
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shell_expand_args = len(target_args) > 0 and isinstance(
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request.arguments["args"], str
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)
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if shell_expand_args:
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if not self.capabilities["supportsArgsCanBeInterpretedByShell"]:
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raise request.isnt_valid(
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'Shell expansion in "args" is not supported by the client'
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)
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if console == "internalConsole":
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raise request.isnt_valid(
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'Shell expansion in "args" is not available for "console":"internalConsole"'
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)
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cwd = request("cwd", str, optional=True)
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if cwd == ():
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# If it's not specified, but we're launching a file rather than a module,
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# and the specified path has a directory in it, use that.
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cwd = None if program == () else (os.path.dirname(program) or None)
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sudo = bool(property_or_debug_option("sudo", "Sudo"))
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if sudo and sys.platform == "win32":
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raise request.cant_handle('"sudo":true is not supported on Windows.')
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on_terminate = request("onTerminate", str, optional=True)
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if on_terminate:
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self._forward_terminate_request = on_terminate == "KeyboardInterrupt"
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launcher_path = request("debugLauncherPath", os.path.dirname(launcher.__file__))
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adapter_host = request("debugAdapterHost", "127.0.0.1")
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try:
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servers.serve(adapter_host)
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except Exception as exc:
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raise request.cant_handle(
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"{0} couldn't create listener socket for servers: {1}",
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self.session,
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exc,
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)
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launchers.spawn_debuggee(
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self.session,
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request,
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[launcher_python],
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launcher_path,
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adapter_host,
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args,
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shell_expand_args,
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cwd,
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console,
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console_title,
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sudo,
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)
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@_start_message_handler
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def attach_request(self, request):
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if self.session.no_debug:
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raise request.isnt_valid('"noDebug" is not supported for "attach"')
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host = request("host", str, optional=True)
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port = request("port", int, optional=True)
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listen = request("listen", dict, optional=True)
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connect = request("connect", dict, optional=True)
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pid = request("processId", (int, str), optional=True)
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sub_pid = request("subProcessId", int, optional=True)
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on_terminate = request("onTerminate", bool, optional=True)
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if on_terminate:
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self._forward_terminate_request = on_terminate == "KeyboardInterrupt"
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if host != () or port != ():
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if listen != ():
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raise request.isnt_valid(
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'"listen" and "host"/"port" are mutually exclusive'
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)
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if connect != ():
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raise request.isnt_valid(
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'"connect" and "host"/"port" are mutually exclusive'
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)
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if listen != ():
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if connect != ():
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raise request.isnt_valid(
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'"listen" and "connect" are mutually exclusive'
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)
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if pid != ():
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raise request.isnt_valid(
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'"listen" and "processId" are mutually exclusive'
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)
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if sub_pid != ():
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raise request.isnt_valid(
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'"listen" and "subProcessId" are mutually exclusive'
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)
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if pid != () and sub_pid != ():
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raise request.isnt_valid(
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'"processId" and "subProcessId" are mutually exclusive'
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)
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if listen != ():
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if servers.is_serving():
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raise request.isnt_valid(
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'Multiple concurrent "listen" sessions are not supported'
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)
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host = listen("host", "127.0.0.1")
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port = listen("port", int)
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adapter.access_token = None
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host, port = servers.serve(host, port)
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else:
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if not servers.is_serving():
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servers.serve()
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host, port = servers.listener.getsockname()
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# There are four distinct possibilities here.
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#
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# If "processId" is specified, this is attach-by-PID. We need to inject the
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# debug server into the designated process, and then wait until it connects
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# back to us. Since the injected server can crash, there must be a timeout.
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#
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# If "subProcessId" is specified, this is attach to a known subprocess, likely
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# in response to a "debugpyAttach" event. If so, the debug server should be
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# connected already, and thus the wait timeout is zero.
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#
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# If "listen" is specified, this is attach-by-socket with the server expected
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# to connect to the adapter via debugpy.connect(). There is no PID known in
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# advance, so just wait until the first server connection indefinitely, with
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# no timeout.
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#
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# If "connect" is specified, this is attach-by-socket in which the server has
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# spawned the adapter via debugpy.listen(). There is no PID known to the client
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# in advance, but the server connection should be either be there already, or
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# the server should be connecting shortly, so there must be a timeout.
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#
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# In the last two cases, if there's more than one server connection already,
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# this is a multiprocess re-attach. The client doesn't know the PID, so we just
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# connect it to the oldest server connection that we have - in most cases, it
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# will be the one for the root debuggee process, but if it has exited already,
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# it will be some subprocess.
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if pid != ():
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if not isinstance(pid, int):
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try:
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pid = int(pid)
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except Exception:
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raise request.isnt_valid('"processId" must be parseable as int')
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debugpy_args = request("debugpyArgs", json.array(str))
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def on_output(category, output):
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self.channel.send_event(
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"output",
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{
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"category": category,
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"output": output,
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|
},
|
|
)
|
|
|
|
try:
|
|
servers.inject(pid, debugpy_args, on_output)
|
|
except Exception as e:
|
|
log.swallow_exception()
|
|
self.session.finalize(
|
|
"Error when trying to attach to PID:\n%s" % (str(e),)
|
|
)
|
|
return
|
|
|
|
timeout = common.PROCESS_SPAWN_TIMEOUT
|
|
pred = lambda conn: conn.pid == pid
|
|
else:
|
|
if sub_pid == ():
|
|
pred = lambda conn: True
|
|
timeout = common.PROCESS_SPAWN_TIMEOUT if listen == () else None
|
|
else:
|
|
pred = lambda conn: conn.pid == sub_pid
|
|
timeout = 0
|
|
|
|
self.channel.send_event("debugpyWaitingForServer", {"host": host, "port": port})
|
|
conn = servers.wait_for_connection(self.session, pred, timeout)
|
|
if conn is None:
|
|
if sub_pid != ():
|
|
# If we can't find a matching subprocess, it's not always an error -
|
|
# it might have already exited, or didn't even get a chance to connect.
|
|
# To prevent the client from complaining, pretend that the "attach"
|
|
# request was successful, but that the session terminated immediately.
|
|
request.respond({})
|
|
self.session.finalize(
|
|
'No known subprocess with "subProcessId":{0}'.format(sub_pid)
|
|
)
|
|
return
|
|
|
|
raise request.cant_handle(
|
|
(
|
|
"Timed out waiting for debug server to connect."
|
|
if timeout
|
|
else "There is no debug server connected to this adapter."
|
|
),
|
|
sub_pid,
|
|
)
|
|
|
|
try:
|
|
conn.attach_to_session(self.session)
|
|
except ValueError:
|
|
request.cant_handle("{0} is already being debugged.", conn)
|
|
|
|
@message_handler
|
|
def configurationDone_request(self, request):
|
|
if self.start_request is None or self.has_started:
|
|
request.cant_handle(
|
|
'"configurationDone" is only allowed during handling of a "launch" '
|
|
'or an "attach" request'
|
|
)
|
|
|
|
try:
|
|
self.has_started = True
|
|
try:
|
|
result = self.server.channel.delegate(request)
|
|
except messaging.NoMoreMessages:
|
|
# Server closed connection before we could receive the response to
|
|
# "configurationDone" - this can happen when debuggee exits shortly
|
|
# after starting. It's not an error, but we can't do anything useful
|
|
# here at this point, either, so just bail out.
|
|
request.respond({})
|
|
self.start_request.respond({})
|
|
self.session.finalize(
|
|
"{0} disconnected before responding to {1}".format(
|
|
self.server,
|
|
json.repr(request.command),
|
|
)
|
|
)
|
|
return
|
|
else:
|
|
request.respond(result)
|
|
except messaging.MessageHandlingError as exc:
|
|
self.start_request.cant_handle(str(exc))
|
|
finally:
|
|
if self.start_request.response is None:
|
|
self.start_request.respond({})
|
|
self._propagate_deferred_events()
|
|
|
|
# Notify the client of any child processes of the debuggee that aren't already
|
|
# being debugged.
|
|
for conn in servers.connections():
|
|
if conn.server is None and conn.ppid == self.session.pid:
|
|
self.notify_of_subprocess(conn)
|
|
|
|
@message_handler
|
|
def evaluate_request(self, request):
|
|
propagated_request = self.server.channel.propagate(request)
|
|
|
|
def handle_response(response):
|
|
request.respond(response.body)
|
|
|
|
propagated_request.on_response(handle_response)
|
|
|
|
return messaging.NO_RESPONSE
|
|
|
|
@message_handler
|
|
def pause_request(self, request):
|
|
request.arguments["threadId"] = "*"
|
|
return self.server.channel.delegate(request)
|
|
|
|
@message_handler
|
|
def continue_request(self, request):
|
|
request.arguments["threadId"] = "*"
|
|
|
|
try:
|
|
return self.server.channel.delegate(request)
|
|
except messaging.NoMoreMessages:
|
|
# pydevd can sometimes allow the debuggee to exit before the queued
|
|
# "continue" response gets sent. Thus, a failed "continue" response
|
|
# indicating that the server disconnected should be treated as success.
|
|
return {"allThreadsContinued": True}
|
|
|
|
@message_handler
|
|
def debugpySystemInfo_request(self, request):
|
|
result = {"debugpy": {"version": debugpy.__version__}}
|
|
if self.server:
|
|
try:
|
|
pydevd_info = self.server.channel.request("pydevdSystemInfo")
|
|
except Exception:
|
|
# If the server has already disconnected, or couldn't handle it,
|
|
# report what we've got.
|
|
pass
|
|
else:
|
|
result.update(pydevd_info)
|
|
return result
|
|
|
|
@message_handler
|
|
def terminate_request(self, request):
|
|
if self._forward_terminate_request:
|
|
# According to the spec, terminate should try to do a gracefull shutdown.
|
|
# We do this in the server by interrupting the main thread with a Ctrl+C.
|
|
# To force the kill a subsequent request would do a disconnect.
|
|
#
|
|
# We only do this if the onTerminate option is set though (the default
|
|
# is a hard-kill for the process and subprocesses).
|
|
return self.server.channel.delegate(request)
|
|
|
|
self.session.finalize('client requested "terminate"', terminate_debuggee=True)
|
|
return {}
|
|
|
|
@message_handler
|
|
def disconnect_request(self, request):
|
|
terminate_debuggee = request("terminateDebuggee", bool, optional=True)
|
|
if terminate_debuggee == ():
|
|
terminate_debuggee = None
|
|
self.session.finalize('client requested "disconnect"', terminate_debuggee)
|
|
return {}
|
|
|
|
def notify_of_subprocess(self, conn):
|
|
log.info("{1} is a subprocess of {0}.", self, conn)
|
|
with self.session:
|
|
if self.start_request is None or conn in self.known_subprocesses:
|
|
return
|
|
if "processId" in self.start_request.arguments:
|
|
log.warning(
|
|
"Not reporting subprocess for {0}, because the parent process "
|
|
'was attached to using "processId" rather than "port".',
|
|
self.session,
|
|
)
|
|
return
|
|
|
|
log.info("Notifying {0} about {1}.", self, conn)
|
|
body = dict(self.start_request.arguments)
|
|
self.known_subprocesses.add(conn)
|
|
self.session.notify_changed()
|
|
|
|
for key in "processId", "listen", "preLaunchTask", "postDebugTask":
|
|
body.pop(key, None)
|
|
|
|
body["name"] = "Subprocess {0}".format(conn.pid)
|
|
body["request"] = "attach"
|
|
body["subProcessId"] = conn.pid
|
|
|
|
for key in "args", "processName", "pythonArgs":
|
|
body.pop(key, None)
|
|
|
|
host = body.pop("host", None)
|
|
port = body.pop("port", None)
|
|
if "connect" not in body:
|
|
body["connect"] = {}
|
|
if "host" not in body["connect"]:
|
|
body["connect"]["host"] = host if host is not None else "127.0.0.1"
|
|
if "port" not in body["connect"]:
|
|
if port is None:
|
|
_, port = listener.getsockname()
|
|
body["connect"]["port"] = port
|
|
|
|
self.channel.send_event("debugpyAttach", body)
|
|
|
|
|
|
def serve(host, port):
|
|
global listener
|
|
listener = sockets.serve("Client", Client, host, port)
|
|
return listener.getsockname()
|
|
|
|
|
|
def stop_serving():
|
|
try:
|
|
listener.close()
|
|
except Exception:
|
|
log.swallow_exception(level="warning")
|