mirror of
https://github.com/python/cpython.git
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3be2e54adc
This associates the message box with the widget and is better for Mac OSX. Patch by Mark Roseman.
402 lines
13 KiB
Python
402 lines
13 KiB
Python
import sys
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import linecache
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import time
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import traceback
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import _thread as thread
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import threading
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import queue
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import tkinter
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from idlelib import CallTips
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from idlelib import AutoComplete
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from idlelib import RemoteDebugger
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from idlelib import RemoteObjectBrowser
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from idlelib import StackViewer
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from idlelib import rpc
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from idlelib import PyShell
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from idlelib import IOBinding
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import __main__
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LOCALHOST = '127.0.0.1'
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import warnings
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def idle_showwarning_subproc(
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message, category, filename, lineno, file=None, line=None):
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"""Show Idle-format warning after replacing warnings.showwarning.
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The only difference is the formatter called.
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"""
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if file is None:
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file = sys.stderr
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try:
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file.write(PyShell.idle_formatwarning(
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message, category, filename, lineno, line))
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except IOError:
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pass # the file (probably stderr) is invalid - this warning gets lost.
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_warnings_showwarning = None
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def capture_warnings(capture):
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"Replace warning.showwarning with idle_showwarning_subproc, or reverse."
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global _warnings_showwarning
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if capture:
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if _warnings_showwarning is None:
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_warnings_showwarning = warnings.showwarning
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warnings.showwarning = idle_showwarning_subproc
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else:
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if _warnings_showwarning is not None:
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warnings.showwarning = _warnings_showwarning
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_warnings_showwarning = None
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capture_warnings(True)
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tcl = tkinter.Tcl()
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def handle_tk_events(tcl=tcl):
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"""Process any tk events that are ready to be dispatched if tkinter
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has been imported, a tcl interpreter has been created and tk has been
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loaded."""
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tcl.eval("update")
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# Thread shared globals: Establish a queue between a subthread (which handles
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# the socket) and the main thread (which runs user code), plus global
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# completion, exit and interruptable (the main thread) flags:
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exit_now = False
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quitting = False
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interruptable = False
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def main(del_exitfunc=False):
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"""Start the Python execution server in a subprocess
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In the Python subprocess, RPCServer is instantiated with handlerclass
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MyHandler, which inherits register/unregister methods from RPCHandler via
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the mix-in class SocketIO.
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When the RPCServer 'server' is instantiated, the TCPServer initialization
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creates an instance of run.MyHandler and calls its handle() method.
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handle() instantiates a run.Executive object, passing it a reference to the
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MyHandler object. That reference is saved as attribute rpchandler of the
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Executive instance. The Executive methods have access to the reference and
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can pass it on to entities that they command
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(e.g. RemoteDebugger.Debugger.start_debugger()). The latter, in turn, can
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call MyHandler(SocketIO) register/unregister methods via the reference to
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register and unregister themselves.
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"""
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global exit_now
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global quitting
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global no_exitfunc
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no_exitfunc = del_exitfunc
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#time.sleep(15) # test subprocess not responding
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try:
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assert(len(sys.argv) > 1)
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port = int(sys.argv[-1])
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except:
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print("IDLE Subprocess: no IP port passed in sys.argv.",
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file=sys.__stderr__)
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return
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capture_warnings(True)
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sys.argv[:] = [""]
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sockthread = threading.Thread(target=manage_socket,
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name='SockThread',
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args=((LOCALHOST, port),))
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sockthread.daemon = True
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sockthread.start()
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while 1:
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try:
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if exit_now:
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try:
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exit()
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except KeyboardInterrupt:
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# exiting but got an extra KBI? Try again!
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continue
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try:
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seq, request = rpc.request_queue.get(block=True, timeout=0.05)
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except queue.Empty:
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handle_tk_events()
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continue
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method, args, kwargs = request
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ret = method(*args, **kwargs)
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rpc.response_queue.put((seq, ret))
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except KeyboardInterrupt:
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if quitting:
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exit_now = True
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continue
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except SystemExit:
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capture_warnings(False)
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raise
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except:
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type, value, tb = sys.exc_info()
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try:
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print_exception()
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rpc.response_queue.put((seq, None))
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except:
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# Link didn't work, print same exception to __stderr__
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traceback.print_exception(type, value, tb, file=sys.__stderr__)
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exit()
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else:
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continue
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def manage_socket(address):
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for i in range(3):
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time.sleep(i)
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try:
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server = MyRPCServer(address, MyHandler)
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break
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except OSError as err:
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print("IDLE Subprocess: OSError: " + err.args[1] +
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", retrying....", file=sys.__stderr__)
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socket_error = err
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else:
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print("IDLE Subprocess: Connection to "
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"IDLE GUI failed, exiting.", file=sys.__stderr__)
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show_socket_error(socket_error, address)
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global exit_now
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exit_now = True
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return
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server.handle_request() # A single request only
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def show_socket_error(err, address):
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import tkinter
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import tkinter.messagebox as tkMessageBox
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root = tkinter.Tk()
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root.withdraw()
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if err.args[0] == 61: # connection refused
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msg = "IDLE's subprocess can't connect to %s:%d. This may be due "\
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"to your personal firewall configuration. It is safe to "\
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"allow this internal connection because no data is visible on "\
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"external ports." % address
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tkMessageBox.showerror("IDLE Subprocess Error", msg, parent=root)
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else:
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tkMessageBox.showerror("IDLE Subprocess Error",
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"Socket Error: %s" % err.args[1], parent=root)
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root.destroy()
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def print_exception():
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import linecache
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linecache.checkcache()
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flush_stdout()
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efile = sys.stderr
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typ, val, tb = excinfo = sys.exc_info()
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sys.last_type, sys.last_value, sys.last_traceback = excinfo
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seen = set()
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def print_exc(typ, exc, tb):
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seen.add(exc)
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context = exc.__context__
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cause = exc.__cause__
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if cause is not None and cause not in seen:
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print_exc(type(cause), cause, cause.__traceback__)
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print("\nThe above exception was the direct cause "
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"of the following exception:\n", file=efile)
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elif (context is not None and
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not exc.__suppress_context__ and
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context not in seen):
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print_exc(type(context), context, context.__traceback__)
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print("\nDuring handling of the above exception, "
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"another exception occurred:\n", file=efile)
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if tb:
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tbe = traceback.extract_tb(tb)
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print('Traceback (most recent call last):', file=efile)
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exclude = ("run.py", "rpc.py", "threading.py", "queue.py",
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"RemoteDebugger.py", "bdb.py")
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cleanup_traceback(tbe, exclude)
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traceback.print_list(tbe, file=efile)
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lines = traceback.format_exception_only(typ, exc)
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for line in lines:
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print(line, end='', file=efile)
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print_exc(typ, val, tb)
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def cleanup_traceback(tb, exclude):
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"Remove excluded traces from beginning/end of tb; get cached lines"
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orig_tb = tb[:]
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while tb:
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for rpcfile in exclude:
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if tb[0][0].count(rpcfile):
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break # found an exclude, break for: and delete tb[0]
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else:
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break # no excludes, have left RPC code, break while:
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del tb[0]
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while tb:
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for rpcfile in exclude:
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if tb[-1][0].count(rpcfile):
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break
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else:
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break
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del tb[-1]
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if len(tb) == 0:
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# exception was in IDLE internals, don't prune!
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tb[:] = orig_tb[:]
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print("** IDLE Internal Exception: ", file=sys.stderr)
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rpchandler = rpc.objecttable['exec'].rpchandler
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for i in range(len(tb)):
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fn, ln, nm, line = tb[i]
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if nm == '?':
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nm = "-toplevel-"
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if not line and fn.startswith("<pyshell#"):
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line = rpchandler.remotecall('linecache', 'getline',
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(fn, ln), {})
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tb[i] = fn, ln, nm, line
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def flush_stdout():
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"""XXX How to do this now?"""
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def exit():
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"""Exit subprocess, possibly after first clearing exit functions.
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If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any
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functions registered with atexit will be removed before exiting.
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(VPython support)
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"""
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if no_exitfunc:
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import atexit
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atexit._clear()
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capture_warnings(False)
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sys.exit(0)
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class MyRPCServer(rpc.RPCServer):
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def handle_error(self, request, client_address):
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"""Override RPCServer method for IDLE
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Interrupt the MainThread and exit server if link is dropped.
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"""
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global quitting
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try:
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raise
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except SystemExit:
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raise
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except EOFError:
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global exit_now
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exit_now = True
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thread.interrupt_main()
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except:
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erf = sys.__stderr__
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print('\n' + '-'*40, file=erf)
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print('Unhandled server exception!', file=erf)
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print('Thread: %s' % threading.current_thread().name, file=erf)
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print('Client Address: ', client_address, file=erf)
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print('Request: ', repr(request), file=erf)
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traceback.print_exc(file=erf)
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print('\n*** Unrecoverable, server exiting!', file=erf)
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print('-'*40, file=erf)
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quitting = True
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thread.interrupt_main()
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class MyHandler(rpc.RPCHandler):
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def handle(self):
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"""Override base method"""
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executive = Executive(self)
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self.register("exec", executive)
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self.console = self.get_remote_proxy("console")
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sys.stdin = PyShell.PseudoInputFile(self.console, "stdin",
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IOBinding.encoding)
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sys.stdout = PyShell.PseudoOutputFile(self.console, "stdout",
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IOBinding.encoding)
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sys.stderr = PyShell.PseudoOutputFile(self.console, "stderr",
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IOBinding.encoding)
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sys.displayhook = rpc.displayhook
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# page help() text to shell.
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import pydoc # import must be done here to capture i/o binding
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pydoc.pager = pydoc.plainpager
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# Keep a reference to stdin so that it won't try to exit IDLE if
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# sys.stdin gets changed from within IDLE's shell. See issue17838.
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self._keep_stdin = sys.stdin
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self.interp = self.get_remote_proxy("interp")
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rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
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def exithook(self):
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"override SocketIO method - wait for MainThread to shut us down"
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time.sleep(10)
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def EOFhook(self):
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"Override SocketIO method - terminate wait on callback and exit thread"
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global quitting
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quitting = True
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thread.interrupt_main()
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def decode_interrupthook(self):
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"interrupt awakened thread"
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global quitting
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quitting = True
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thread.interrupt_main()
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class Executive(object):
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def __init__(self, rpchandler):
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self.rpchandler = rpchandler
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self.locals = __main__.__dict__
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self.calltip = CallTips.CallTips()
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self.autocomplete = AutoComplete.AutoComplete()
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def runcode(self, code):
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global interruptable
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try:
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self.usr_exc_info = None
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interruptable = True
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try:
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exec(code, self.locals)
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finally:
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interruptable = False
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except SystemExit:
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# Scripts that raise SystemExit should just
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# return to the interactive prompt
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pass
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except:
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self.usr_exc_info = sys.exc_info()
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if quitting:
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exit()
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# even print a user code SystemExit exception, continue
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print_exception()
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jit = self.rpchandler.console.getvar("<<toggle-jit-stack-viewer>>")
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if jit:
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self.rpchandler.interp.open_remote_stack_viewer()
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else:
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flush_stdout()
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def interrupt_the_server(self):
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if interruptable:
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thread.interrupt_main()
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def start_the_debugger(self, gui_adap_oid):
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return RemoteDebugger.start_debugger(self.rpchandler, gui_adap_oid)
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def stop_the_debugger(self, idb_adap_oid):
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"Unregister the Idb Adapter. Link objects and Idb then subject to GC"
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self.rpchandler.unregister(idb_adap_oid)
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def get_the_calltip(self, name):
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return self.calltip.fetch_tip(name)
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def get_the_completion_list(self, what, mode):
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return self.autocomplete.fetch_completions(what, mode)
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def stackviewer(self, flist_oid=None):
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if self.usr_exc_info:
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typ, val, tb = self.usr_exc_info
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else:
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return None
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flist = None
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if flist_oid is not None:
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flist = self.rpchandler.get_remote_proxy(flist_oid)
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while tb and tb.tb_frame.f_globals["__name__"] in ["rpc", "run"]:
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tb = tb.tb_next
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sys.last_type = typ
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sys.last_value = val
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item = StackViewer.StackTreeItem(flist, tb)
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return RemoteObjectBrowser.remote_object_tree_item(item)
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capture_warnings(False) # Make sure turned off; see issue 18081
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