import os
import sys
import threading
import traceback
from .signal import Signal
main_thread_id = threading.current_thread().ident
already_run = False
def is_running_in_debugger():
return bool(sys.gettrace())
def enable_exception_handler(force=False):
global already_run
if already_run:
return
already_run = True
if not force and is_running_in_debugger():
print(
"running in debugger, not enabling exception handler " "after all."
)
_let_thread_exceptions_be_unhandled()
return False
# print("enabling except hook")
sys.excepthook = _handle_exception
_enable_thread_exception_handler()
return True
def _let_thread_exceptions_be_unhandled():
"""Replace method in Thread class to let exceptions be picked up by
the debugger. This is done by replacing the bootstrap function,
which normally catches all exceptions."""
print("let thread exceptions be unhandled (for debugger)")
if sys.version.startswith("2.7"):
threading.Thread._Thread__bootstrap = _thread_bootstrap_2_7
else:
print(
"WARNING: no Thread bootstrap replacement for this "
"python version. The debugger will not break on unhandled"
"exceptions in threads other than the main thread."
)
def _enable_thread_exception_handler():
# print("enable tread exception handler")
def run():
self = threading.current_thread()
try:
self._run_()
except:
_handle_exception(*sys.exc_info())
def set_ident(self):
# self = threading.current_thread()
self._run_ = self.run
self.run = run
self._set_ident_()
# noinspection PyProtectedMember
threading.Thread._set_ident_ = threading.Thread._set_ident
threading.Thread._set_ident = set_ident
def _handle_exception(exc_type, exc_value, exc_traceback):
if issubclass(exc_type, KeyboardInterrupt):
print("handle_exception: KeyboardInterrupt caught")
sys.exit(1)
# FIXME: PYTHON3
tb = traceback.extract_tb(exc_traceback)
# print(exc_type, exc_value, tb)
filename, line, function, dummy = tb.pop()
try:
filename = filename.decode(sys.getfilesystemencoding())
except:
pass
try:
filename = str(filename)
except:
pass
filename = os.path.basename(filename)
thread = threading.currentThread()
error_id = "{0}:{1}:{2}:{3}".format(
exc_type.__name__, filename, function, line
)
# QtGui.QMessageBox.critical(None, "Error",
# description = "A critical error has occurred.
"
# + "%s
" % error
# + "It occurred at line %d of file "
# "%s.
" % (
# line, filename)
# + "")
#
backtrace_string = "".join(
traceback.format_exception(exc_type, exc_value, exc_traceback)
)
message = "\nUnhandled exception detected in thread {0}:\n {1}\n".format(
thread.getName(), error_id
)
print(message)
print(backtrace_string)
print(message, file=sys.stderr)
print(backtrace_string, file=sys.stderr)
if thread.ident == main_thread_id:
try:
# FIXME
# import wx
# app = wx.GetApp()
# if app is not None:
# wx.MessageBox(message + "\n" + backtrace_string)
# if app.IsMainLoopRunning():
# return
# print("The application will now close due to the above error")
# print("calling app.Exit")
# app.Exit()
Signal("quit").notify()
except Exception as e:
print(repr(e))
# sys.exit(1)
class AdditionalInfo(object):
pass
def _thread_bootstrap_2_7(self):
"""This is a replacement "method" for the Thread class in Python 2.7,
designed to let an exception fall through to the debugger."""
# noinspection PyProtectedMember
# noinspection PyUnresolvedReferences
from threading import _active_limbo_lock, _active, _limbo, _trace_hook
# noinspection PyProtectedMember
# noinspection PyUnresolvedReferences
from threading import _profile_hook, _sys, _get_ident
try:
self._set_ident()
self._Thread__started.set()
with _active_limbo_lock:
_active[self._Thread__ident] = self
del _limbo[self]
if __debug__:
self._note("%s.__bootstrap(): thread started", self)
# if _trace_hook:
# self._note("%s.__bootstrap(): registering trace hook", self)
# _sys.settrace(_trace_hook)
if _profile_hook:
self._note("%s.__bootstrap(): registering profile hook", self)
_sys.setprofile(_profile_hook)
try:
self.run()
except SystemExit:
if __debug__:
self._note("%s.__bootstrap(): raised SystemExit", self)
else:
if __debug__:
self._note("%s.__bootstrap(): normal return", self)
finally:
# Prevent a race in
# test_threading.test_no_refcycle_through_target when
# the exception keeps the target alive past when we
# assert that it's dead.
self._Thread__exc_clear()
finally:
with _active_limbo_lock:
self._Thread__stop()
try:
# We don't call self.__delete() because it also
# grabs _active_limbo_lock.
del _active[_get_ident()]
except:
pass