| Current File : //opt/alt/python34/lib64/python3.4/idlelib/run.py |
import sys
import linecache
import time
import traceback
import _thread as thread
import threading
import queue
import tkinter
from idlelib import CallTips
from idlelib import AutoComplete
from idlelib import RemoteDebugger
from idlelib import RemoteObjectBrowser
from idlelib import StackViewer
from idlelib import rpc
from idlelib import PyShell
from idlelib import IOBinding
import __main__
LOCALHOST = '127.0.0.1'
import warnings
def idle_showwarning_subproc(
message, category, filename, lineno, file=None, line=None):
"""Show Idle-format warning after replacing warnings.showwarning.
The only difference is the formatter called.
"""
if file is None:
file = sys.stderr
try:
file.write(PyShell.idle_formatwarning(
message, category, filename, lineno, line))
except IOError:
pass # the file (probably stderr) is invalid - this warning gets lost.
_warnings_showwarning = None
def capture_warnings(capture):
"Replace warning.showwarning with idle_showwarning_subproc, or reverse."
global _warnings_showwarning
if capture:
if _warnings_showwarning is None:
_warnings_showwarning = warnings.showwarning
warnings.showwarning = idle_showwarning_subproc
else:
if _warnings_showwarning is not None:
warnings.showwarning = _warnings_showwarning
_warnings_showwarning = None
capture_warnings(True)
tcl = tkinter.Tcl()
def handle_tk_events(tcl=tcl):
"""Process any tk events that are ready to be dispatched if tkinter
has been imported, a tcl interpreter has been created and tk has been
loaded."""
tcl.eval("update")
# Thread shared globals: Establish a queue between a subthread (which handles
# the socket) and the main thread (which runs user code), plus global
# completion, exit and interruptable (the main thread) flags:
exit_now = False
quitting = False
interruptable = False
def main(del_exitfunc=False):
"""Start the Python execution server in a subprocess
In the Python subprocess, RPCServer is instantiated with handlerclass
MyHandler, which inherits register/unregister methods from RPCHandler via
the mix-in class SocketIO.
When the RPCServer 'server' is instantiated, the TCPServer initialization
creates an instance of run.MyHandler and calls its handle() method.
handle() instantiates a run.Executive object, passing it a reference to the
MyHandler object. That reference is saved as attribute rpchandler of the
Executive instance. The Executive methods have access to the reference and
can pass it on to entities that they command
(e.g. RemoteDebugger.Debugger.start_debugger()). The latter, in turn, can
call MyHandler(SocketIO) register/unregister methods via the reference to
register and unregister themselves.
"""
global exit_now
global quitting
global no_exitfunc
no_exitfunc = del_exitfunc
#time.sleep(15) # test subprocess not responding
try:
assert(len(sys.argv) > 1)
port = int(sys.argv[-1])
except:
print("IDLE Subprocess: no IP port passed in sys.argv.",
file=sys.__stderr__)
return
capture_warnings(True)
sys.argv[:] = [""]
sockthread = threading.Thread(target=manage_socket,
name='SockThread',
args=((LOCALHOST, port),))
sockthread.daemon = True
sockthread.start()
while 1:
try:
if exit_now:
try:
exit()
except KeyboardInterrupt:
# exiting but got an extra KBI? Try again!
continue
try:
seq, request = rpc.request_queue.get(block=True, timeout=0.05)
except queue.Empty:
handle_tk_events()
continue
method, args, kwargs = request
ret = method(*args, **kwargs)
rpc.response_queue.put((seq, ret))
except KeyboardInterrupt:
if quitting:
exit_now = True
continue
except SystemExit:
capture_warnings(False)
raise
except:
type, value, tb = sys.exc_info()
try:
print_exception()
rpc.response_queue.put((seq, None))
except:
# Link didn't work, print same exception to __stderr__
traceback.print_exception(type, value, tb, file=sys.__stderr__)
exit()
else:
continue
def manage_socket(address):
for i in range(3):
time.sleep(i)
try:
server = MyRPCServer(address, MyHandler)
break
except OSError as err:
print("IDLE Subprocess: OSError: " + err.args[1] +
", retrying....", file=sys.__stderr__)
socket_error = err
else:
print("IDLE Subprocess: Connection to "
"IDLE GUI failed, exiting.", file=sys.__stderr__)
show_socket_error(socket_error, address)
global exit_now
exit_now = True
return
server.handle_request() # A single request only
def show_socket_error(err, address):
import tkinter
import tkinter.messagebox as tkMessageBox
root = tkinter.Tk()
root.withdraw()
if err.args[0] == 61: # connection refused
msg = "IDLE's subprocess can't connect to %s:%d. This may be due "\
"to your personal firewall configuration. It is safe to "\
"allow this internal connection because no data is visible on "\
"external ports." % address
tkMessageBox.showerror("IDLE Subprocess Error", msg, parent=root)
else:
tkMessageBox.showerror("IDLE Subprocess Error",
"Socket Error: %s" % err.args[1], parent=root)
root.destroy()
def print_exception():
import linecache
linecache.checkcache()
flush_stdout()
efile = sys.stderr
typ, val, tb = excinfo = sys.exc_info()
sys.last_type, sys.last_value, sys.last_traceback = excinfo
seen = set()
def print_exc(typ, exc, tb):
seen.add(exc)
context = exc.__context__
cause = exc.__cause__
if cause is not None and cause not in seen:
print_exc(type(cause), cause, cause.__traceback__)
print("\nThe above exception was the direct cause "
"of the following exception:\n", file=efile)
elif (context is not None and
not exc.__suppress_context__ and
context not in seen):
print_exc(type(context), context, context.__traceback__)
print("\nDuring handling of the above exception, "
"another exception occurred:\n", file=efile)
if tb:
tbe = traceback.extract_tb(tb)
print('Traceback (most recent call last):', file=efile)
exclude = ("run.py", "rpc.py", "threading.py", "queue.py",
"RemoteDebugger.py", "bdb.py")
cleanup_traceback(tbe, exclude)
traceback.print_list(tbe, file=efile)
lines = traceback.format_exception_only(typ, exc)
for line in lines:
print(line, end='', file=efile)
print_exc(typ, val, tb)
def cleanup_traceback(tb, exclude):
"Remove excluded traces from beginning/end of tb; get cached lines"
orig_tb = tb[:]
while tb:
for rpcfile in exclude:
if tb[0][0].count(rpcfile):
break # found an exclude, break for: and delete tb[0]
else:
break # no excludes, have left RPC code, break while:
del tb[0]
while tb:
for rpcfile in exclude:
if tb[-1][0].count(rpcfile):
break
else:
break
del tb[-1]
if len(tb) == 0:
# exception was in IDLE internals, don't prune!
tb[:] = orig_tb[:]
print("** IDLE Internal Exception: ", file=sys.stderr)
rpchandler = rpc.objecttable['exec'].rpchandler
for i in range(len(tb)):
fn, ln, nm, line = tb[i]
if nm == '?':
nm = "-toplevel-"
if not line and fn.startswith("<pyshell#"):
line = rpchandler.remotecall('linecache', 'getline',
(fn, ln), {})
tb[i] = fn, ln, nm, line
def flush_stdout():
"""XXX How to do this now?"""
def exit():
"""Exit subprocess, possibly after first clearing exit functions.
If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any
functions registered with atexit will be removed before exiting.
(VPython support)
"""
if no_exitfunc:
import atexit
atexit._clear()
capture_warnings(False)
sys.exit(0)
class MyRPCServer(rpc.RPCServer):
def handle_error(self, request, client_address):
"""Override RPCServer method for IDLE
Interrupt the MainThread and exit server if link is dropped.
"""
global quitting
try:
raise
except SystemExit:
raise
except EOFError:
global exit_now
exit_now = True
thread.interrupt_main()
except:
erf = sys.__stderr__
print('\n' + '-'*40, file=erf)
print('Unhandled server exception!', file=erf)
print('Thread: %s' % threading.current_thread().name, file=erf)
print('Client Address: ', client_address, file=erf)
print('Request: ', repr(request), file=erf)
traceback.print_exc(file=erf)
print('\n*** Unrecoverable, server exiting!', file=erf)
print('-'*40, file=erf)
quitting = True
thread.interrupt_main()
class MyHandler(rpc.RPCHandler):
def handle(self):
"""Override base method"""
executive = Executive(self)
self.register("exec", executive)
self.console = self.get_remote_proxy("console")
sys.stdin = PyShell.PseudoInputFile(self.console, "stdin",
IOBinding.encoding)
sys.stdout = PyShell.PseudoOutputFile(self.console, "stdout",
IOBinding.encoding)
sys.stderr = PyShell.PseudoOutputFile(self.console, "stderr",
IOBinding.encoding)
sys.displayhook = rpc.displayhook
# page help() text to shell.
import pydoc # import must be done here to capture i/o binding
pydoc.pager = pydoc.plainpager
# Keep a reference to stdin so that it won't try to exit IDLE if
# sys.stdin gets changed from within IDLE's shell. See issue17838.
self._keep_stdin = sys.stdin
self.interp = self.get_remote_proxy("interp")
rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
def exithook(self):
"override SocketIO method - wait for MainThread to shut us down"
time.sleep(10)
def EOFhook(self):
"Override SocketIO method - terminate wait on callback and exit thread"
global quitting
quitting = True
thread.interrupt_main()
def decode_interrupthook(self):
"interrupt awakened thread"
global quitting
quitting = True
thread.interrupt_main()
class Executive(object):
def __init__(self, rpchandler):
self.rpchandler = rpchandler
self.locals = __main__.__dict__
self.calltip = CallTips.CallTips()
self.autocomplete = AutoComplete.AutoComplete()
def runcode(self, code):
global interruptable
try:
self.usr_exc_info = None
interruptable = True
try:
exec(code, self.locals)
finally:
interruptable = False
except SystemExit:
# Scripts that raise SystemExit should just
# return to the interactive prompt
pass
except:
self.usr_exc_info = sys.exc_info()
if quitting:
exit()
# even print a user code SystemExit exception, continue
print_exception()
jit = self.rpchandler.console.getvar("<<toggle-jit-stack-viewer>>")
if jit:
self.rpchandler.interp.open_remote_stack_viewer()
else:
flush_stdout()
def interrupt_the_server(self):
if interruptable:
thread.interrupt_main()
def start_the_debugger(self, gui_adap_oid):
return RemoteDebugger.start_debugger(self.rpchandler, gui_adap_oid)
def stop_the_debugger(self, idb_adap_oid):
"Unregister the Idb Adapter. Link objects and Idb then subject to GC"
self.rpchandler.unregister(idb_adap_oid)
def get_the_calltip(self, name):
return self.calltip.fetch_tip(name)
def get_the_completion_list(self, what, mode):
return self.autocomplete.fetch_completions(what, mode)
def stackviewer(self, flist_oid=None):
if self.usr_exc_info:
typ, val, tb = self.usr_exc_info
else:
return None
flist = None
if flist_oid is not None:
flist = self.rpchandler.get_remote_proxy(flist_oid)
while tb and tb.tb_frame.f_globals["__name__"] in ["rpc", "run"]:
tb = tb.tb_next
sys.last_type = typ
sys.last_value = val
item = StackViewer.StackTreeItem(flist, tb)
return RemoteObjectBrowser.remote_object_tree_item(item)
capture_warnings(False) # Make sure turned off; see issue 18081