# -*- coding: utf-8 -*- # A vendored version of part of https://github.com/ionelmc/python-tblib # pylint:disable=redefined-outer-name,reimported,function-redefined,bare-except,no-else-return,broad-except #### # Copyright (c) 2013-2016, Ionel Cristian Mărieș # All rights reserved. # Redistribution and use in source and binary forms, with or without modification, are permitted provided that the # following conditions are met: # 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following # disclaimer. # 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following # disclaimer in the documentation and/or other materials provided with the distribution. # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, # INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #### # cpython.py """ Taken verbatim from Jinja2. https://github.com/mitsuhiko/jinja2/blob/master/jinja2/debug.py#L267 """ #import platform # XXX: gevent cannot import platform at the top level; interferes with monkey patching import sys def _init_ugly_crap(): """This function implements a few ugly things so that we can patch the traceback objects. The function returned allows resetting `tb_next` on any python traceback object. Do not attempt to use this on non cpython interpreters """ import ctypes from types import TracebackType # figure out side of _Py_ssize_t if hasattr(ctypes.pythonapi, 'Py_InitModule4_64'): _Py_ssize_t = ctypes.c_int64 else: _Py_ssize_t = ctypes.c_int # regular python class _PyObject(ctypes.Structure): pass _PyObject._fields_ = [ ('ob_refcnt', _Py_ssize_t), ('ob_type', ctypes.POINTER(_PyObject)) ] # python with trace if hasattr(sys, 'getobjects'): class _PyObject(ctypes.Structure): pass _PyObject._fields_ = [ ('_ob_next', ctypes.POINTER(_PyObject)), ('_ob_prev', ctypes.POINTER(_PyObject)), ('ob_refcnt', _Py_ssize_t), ('ob_type', ctypes.POINTER(_PyObject)) ] class _Traceback(_PyObject): pass _Traceback._fields_ = [ ('tb_next', ctypes.POINTER(_Traceback)), ('tb_frame', ctypes.POINTER(_PyObject)), ('tb_lasti', ctypes.c_int), ('tb_lineno', ctypes.c_int) ] def tb_set_next(tb, next): """Set the tb_next attribute of a traceback object.""" if not (isinstance(tb, TracebackType) and (next is None or isinstance(next, TracebackType))): raise TypeError('tb_set_next arguments must be traceback objects') obj = _Traceback.from_address(id(tb)) if tb.tb_next is not None: old = _Traceback.from_address(id(tb.tb_next)) old.ob_refcnt -= 1 if next is None: obj.tb_next = ctypes.POINTER(_Traceback)() else: next = _Traceback.from_address(id(next)) next.ob_refcnt += 1 obj.tb_next = ctypes.pointer(next) return tb_set_next tb_set_next = None #try: # if platform.python_implementation() == 'CPython': # tb_set_next = _init_ugly_crap() #except Exception as exc: # sys.stderr.write("Failed to initialize cpython support: {!r}".format(exc)) #del _init_ugly_crap # __init__.py import re from types import CodeType from types import TracebackType try: from __pypy__ import tproxy except ImportError: tproxy = None __version__ = '1.3.0' __all__ = ('Traceback',) PY3 = sys.version_info[0] == 3 FRAME_RE = re.compile(r'^\s*File "(?P.+)", line (?P\d+)(, in (?P.+))?$') class _AttrDict(dict): __slots__ = () __getattr__ = dict.__getitem__ # noinspection PyPep8Naming class __traceback_maker(Exception): pass class TracebackParseError(Exception): pass class Code(object): def __init__(self, code): self.co_filename = code.co_filename self.co_name = code.co_name # gevent: copy more attributes self.co_nlocals = code.co_nlocals self.co_stacksize = code.co_stacksize self.co_flags = code.co_flags self.co_firstlineno = code.co_firstlineno class Frame(object): def __init__(self, frame): self.f_globals = dict([ (k, v) for k, v in frame.f_globals.items() if k in ("__file__", "__name__") ]) self.f_code = Code(frame.f_code) def clear(self): # For compatibility with PyPy 3.5; # clear was added to frame in Python 3.4 # and is called by traceback.clear_frames(), which # in turn is called by unittest.TestCase.assertRaises pass class Traceback(object): tb_next = None def __init__(self, tb): self.tb_frame = Frame(tb.tb_frame) # noinspection SpellCheckingInspection self.tb_lineno = int(tb.tb_lineno) # Build in place to avoid exceeding the recursion limit tb = tb.tb_next prev_traceback = self cls = type(self) while tb is not None: traceback = object.__new__(cls) traceback.tb_frame = Frame(tb.tb_frame) traceback.tb_lineno = int(tb.tb_lineno) prev_traceback.tb_next = traceback prev_traceback = traceback tb = tb.tb_next def as_traceback(self): if tproxy: return tproxy(TracebackType, self.__tproxy_handler) if not tb_set_next: raise RuntimeError("Cannot re-create traceback !") current = self top_tb = None tb = None while current: f_code = current.tb_frame.f_code code = compile('\n' * (current.tb_lineno - 1) + 'raise __traceback_maker', current.tb_frame.f_code.co_filename, 'exec') if PY3: code = CodeType( 0, code.co_kwonlyargcount, code.co_nlocals, code.co_stacksize, code.co_flags, code.co_code, code.co_consts, code.co_names, code.co_varnames, f_code.co_filename, f_code.co_name, code.co_firstlineno, code.co_lnotab, (), () ) else: code = CodeType( 0, code.co_nlocals, code.co_stacksize, code.co_flags, code.co_code, code.co_consts, code.co_names, code.co_varnames, f_code.co_filename.encode(), f_code.co_name.encode(), code.co_firstlineno, code.co_lnotab, (), () ) # noinspection PyBroadException try: exec(code, current.tb_frame.f_globals, {}) except: next_tb = sys.exc_info()[2].tb_next if top_tb is None: top_tb = next_tb if tb is not None: tb_set_next(tb, next_tb) tb = next_tb del next_tb current = current.tb_next try: return top_tb finally: del top_tb del tb # noinspection SpellCheckingInspection def __tproxy_handler(self, operation, *args, **kwargs): if operation in ('__getattribute__', '__getattr__'): if args[0] == 'tb_next': return self.tb_next and self.tb_next.as_traceback() else: return getattr(self, args[0]) else: return getattr(self, operation)(*args, **kwargs) def to_dict(self): """Convert a Traceback into a dictionary representation""" if self.tb_next is None: tb_next = None else: tb_next = self.tb_next.to_dict() code = { 'co_filename': self.tb_frame.f_code.co_filename, 'co_name': self.tb_frame.f_code.co_name, } frame = { 'f_globals': self.tb_frame.f_globals, 'f_code': code, } return { 'tb_frame': frame, 'tb_lineno': self.tb_lineno, 'tb_next': tb_next, } @classmethod def from_dict(cls, dct): if dct['tb_next']: tb_next = cls.from_dict(dct['tb_next']) else: tb_next = None code = _AttrDict( co_filename=dct['tb_frame']['f_code']['co_filename'], co_name=dct['tb_frame']['f_code']['co_name'], ) frame = _AttrDict( f_globals=dct['tb_frame']['f_globals'], f_code=code, ) tb = _AttrDict( tb_frame=frame, tb_lineno=dct['tb_lineno'], tb_next=tb_next, ) return cls(tb) @classmethod def from_string(cls, string, strict=True): frames = [] header = strict for line in string.splitlines(): line = line.rstrip() if header: if line == 'Traceback (most recent call last):': header = False continue frame_match = FRAME_RE.match(line) if frame_match: frames.append(frame_match.groupdict()) elif line.startswith(' '): pass elif strict: break # traceback ended if frames: previous = None for frame in reversed(frames): previous = _AttrDict( frame, tb_frame=_AttrDict( frame, f_globals=_AttrDict( __file__=frame['co_filename'], __name__='?', ), f_code=_AttrDict(frame), ), tb_next=previous, ) return cls(previous) else: raise TracebackParseError("Could not find any frames in %r." % string) # pickling_support.py def unpickle_traceback(tb_frame, tb_lineno, tb_next): ret = object.__new__(Traceback) ret.tb_frame = tb_frame ret.tb_lineno = tb_lineno ret.tb_next = tb_next return ret.as_traceback() def pickle_traceback(tb): return unpickle_traceback, (Frame(tb.tb_frame), tb.tb_lineno, tb.tb_next and Traceback(tb.tb_next)) def install(): try: import copy_reg except ImportError: import copyreg as copy_reg copy_reg.pickle(TracebackType, pickle_traceback) # Added by gevent # We have to defer the initialization, and especially the import of platform, # until runtime. If we're monkey patched, we need to be sure to use # the original __import__ to avoid switching through the hub due to # import locks on Python 2. See also builtins.py for details. def _unlocked_imports(f): def g(a): if sys is None: # pragma: no cover # interpreter shutdown on Py2 return gb = None if 'gevent.builtins' in sys.modules: gb = sys.modules['gevent.builtins'] gb._unlock_imports() try: return f(a) finally: if gb is not None: gb._lock_imports() g.__name__ = f.__name__ g.__module__ = f.__module__ return g def _import_dump_load(): global dumps global loads try: import cPickle as pickle except ImportError: import pickle dumps = pickle.dumps loads = pickle.loads dumps = loads = None _installed = False def _init(): global _installed global tb_set_next if _installed: return _installed = True import platform try: if platform.python_implementation() == 'CPython': tb_set_next = _init_ugly_crap() except Exception as exc: sys.stderr.write("Failed to initialize cpython support: {!r}".format(exc)) try: from __pypy__ import tproxy except ImportError: tproxy = None if not tb_set_next and not tproxy: raise ImportError("Cannot use tblib. Runtime not supported.") _import_dump_load() install() @_unlocked_imports def dump_traceback(tb): # Both _init and dump/load have to be unlocked, because # copy_reg and pickle can do imports to resolve class names; those # class names are in this module and greenlet safe though _init() return dumps(tb) @_unlocked_imports def load_traceback(s): _init() return loads(s)