mirror of
https://github.com/python/cpython.git
synced 2025-08-04 00:48:58 +00:00
89cee94b31
Previously the C implementation of pickle.Pickler and pickle.Unpickler classes did not have such methods and they could only be used if they were overloaded in subclasses or set as instance attributes. Fixed calling super().persistent_id() and super().persistent_load() in subclasses of the C implementation of pickle.Pickler and pickle.Unpickler classes. It no longer causes an infinite recursion.
602 lines
22 KiB
Python
602 lines
22 KiB
Python
from _compat_pickle import (IMPORT_MAPPING, REVERSE_IMPORT_MAPPING,
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NAME_MAPPING, REVERSE_NAME_MAPPING)
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import builtins
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import pickle
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import io
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import collections
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import struct
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import sys
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import warnings
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import weakref
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import doctest
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import unittest
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from test import support
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from test.support import import_helper
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from test.pickletester import AbstractHookTests
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from test.pickletester import AbstractUnpickleTests
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from test.pickletester import AbstractPickleTests
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from test.pickletester import AbstractPickleModuleTests
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from test.pickletester import AbstractPersistentPicklerTests
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from test.pickletester import AbstractIdentityPersistentPicklerTests
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from test.pickletester import AbstractPicklerUnpicklerObjectTests
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from test.pickletester import AbstractDispatchTableTests
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from test.pickletester import AbstractCustomPicklerClass
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from test.pickletester import BigmemPickleTests
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try:
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import _pickle
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has_c_implementation = True
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except ImportError:
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has_c_implementation = False
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class PyPickleTests(AbstractPickleModuleTests, unittest.TestCase):
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dump = staticmethod(pickle._dump)
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dumps = staticmethod(pickle._dumps)
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load = staticmethod(pickle._load)
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loads = staticmethod(pickle._loads)
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Pickler = pickle._Pickler
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Unpickler = pickle._Unpickler
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class PyUnpicklerTests(AbstractUnpickleTests, unittest.TestCase):
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unpickler = pickle._Unpickler
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bad_stack_errors = (IndexError,)
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truncated_errors = (pickle.UnpicklingError, EOFError,
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AttributeError, ValueError,
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struct.error, IndexError, ImportError)
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def loads(self, buf, **kwds):
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f = io.BytesIO(buf)
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u = self.unpickler(f, **kwds)
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return u.load()
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class PyPicklerTests(AbstractPickleTests, unittest.TestCase):
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pickler = pickle._Pickler
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unpickler = pickle._Unpickler
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def dumps(self, arg, proto=None, **kwargs):
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f = io.BytesIO()
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p = self.pickler(f, proto, **kwargs)
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p.dump(arg)
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f.seek(0)
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return bytes(f.read())
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def loads(self, buf, **kwds):
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f = io.BytesIO(buf)
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u = self.unpickler(f, **kwds)
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return u.load()
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class InMemoryPickleTests(AbstractPickleTests, AbstractUnpickleTests,
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BigmemPickleTests, unittest.TestCase):
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bad_stack_errors = (pickle.UnpicklingError, IndexError)
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truncated_errors = (pickle.UnpicklingError, EOFError,
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AttributeError, ValueError,
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struct.error, IndexError, ImportError)
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def dumps(self, arg, protocol=None, **kwargs):
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return pickle.dumps(arg, protocol, **kwargs)
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def loads(self, buf, **kwds):
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return pickle.loads(buf, **kwds)
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test_framed_write_sizes_with_delayed_writer = None
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class PersistentPicklerUnpicklerMixin(object):
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def dumps(self, arg, proto=None):
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class PersPickler(self.pickler):
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def persistent_id(subself, obj):
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return self.persistent_id(obj)
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f = io.BytesIO()
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p = PersPickler(f, proto)
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p.dump(arg)
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return f.getvalue()
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def loads(self, buf, **kwds):
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class PersUnpickler(self.unpickler):
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def persistent_load(subself, obj):
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return self.persistent_load(obj)
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f = io.BytesIO(buf)
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u = PersUnpickler(f, **kwds)
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return u.load()
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class PyPersPicklerTests(AbstractPersistentPicklerTests,
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PersistentPicklerUnpicklerMixin, unittest.TestCase):
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pickler = pickle._Pickler
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unpickler = pickle._Unpickler
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class PyIdPersPicklerTests(AbstractIdentityPersistentPicklerTests,
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PersistentPicklerUnpicklerMixin, unittest.TestCase):
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pickler = pickle._Pickler
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unpickler = pickle._Unpickler
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persistent_load_error = pickle.UnpicklingError
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@support.cpython_only
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def test_pickler_reference_cycle(self):
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def check(Pickler):
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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f = io.BytesIO()
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pickler = Pickler(f, proto)
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pickler.dump('abc')
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self.assertEqual(self.loads(f.getvalue()), 'abc')
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pickler = Pickler(io.BytesIO())
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self.assertEqual(pickler.persistent_id('def'), 'def')
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r = weakref.ref(pickler)
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del pickler
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self.assertIsNone(r())
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class PersPickler(self.pickler):
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def persistent_id(subself, obj):
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return obj
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check(PersPickler)
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class PersPickler(self.pickler):
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@classmethod
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def persistent_id(cls, obj):
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return obj
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check(PersPickler)
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class PersPickler(self.pickler):
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@staticmethod
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def persistent_id(obj):
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return obj
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check(PersPickler)
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@support.cpython_only
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def test_custom_pickler_dispatch_table_memleak(self):
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# See https://github.com/python/cpython/issues/89988
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class Pickler(self.pickler):
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def __init__(self, *args, **kwargs):
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self.dispatch_table = table
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super().__init__(*args, **kwargs)
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class DispatchTable:
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pass
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table = DispatchTable()
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pickler = Pickler(io.BytesIO())
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self.assertIs(pickler.dispatch_table, table)
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table_ref = weakref.ref(table)
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self.assertIsNotNone(table_ref())
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del pickler
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del table
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support.gc_collect()
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self.assertIsNone(table_ref())
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@support.cpython_only
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def test_unpickler_reference_cycle(self):
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def check(Unpickler):
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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unpickler = Unpickler(io.BytesIO(self.dumps('abc', proto)))
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self.assertEqual(unpickler.load(), 'abc')
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unpickler = Unpickler(io.BytesIO())
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self.assertEqual(unpickler.persistent_load('def'), 'def')
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r = weakref.ref(unpickler)
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del unpickler
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self.assertIsNone(r())
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class PersUnpickler(self.unpickler):
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def persistent_load(subself, pid):
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return pid
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check(PersUnpickler)
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class PersUnpickler(self.unpickler):
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@classmethod
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def persistent_load(cls, pid):
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return pid
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check(PersUnpickler)
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class PersUnpickler(self.unpickler):
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@staticmethod
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def persistent_load(pid):
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return pid
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check(PersUnpickler)
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def test_pickler_super(self):
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class PersPickler(self.pickler):
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def persistent_id(subself, obj):
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self.assertIsNone(super().persistent_id(obj))
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return obj
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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f = io.BytesIO()
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pickler = PersPickler(f, proto)
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pickler.dump('abc')
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self.assertEqual(self.loads(f.getvalue()), 'abc')
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def test_unpickler_super(self):
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class PersUnpickler(self.unpickler):
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def persistent_load(subself, pid):
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with self.assertRaises(self.persistent_load_error):
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super().persistent_load(pid)
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return pid
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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unpickler = PersUnpickler(io.BytesIO(self.dumps('abc', proto)))
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self.assertEqual(unpickler.load(), 'abc')
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class PyPicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests, unittest.TestCase):
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pickler_class = pickle._Pickler
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unpickler_class = pickle._Unpickler
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class PyDispatchTableTests(AbstractDispatchTableTests, unittest.TestCase):
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pickler_class = pickle._Pickler
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def get_dispatch_table(self):
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return pickle.dispatch_table.copy()
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class PyChainDispatchTableTests(AbstractDispatchTableTests, unittest.TestCase):
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pickler_class = pickle._Pickler
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def get_dispatch_table(self):
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return collections.ChainMap({}, pickle.dispatch_table)
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class PyPicklerHookTests(AbstractHookTests, unittest.TestCase):
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class CustomPyPicklerClass(pickle._Pickler,
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AbstractCustomPicklerClass):
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pass
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pickler_class = CustomPyPicklerClass
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if has_c_implementation:
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class CPickleTests(AbstractPickleModuleTests, unittest.TestCase):
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from _pickle import dump, dumps, load, loads, Pickler, Unpickler
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class CUnpicklerTests(PyUnpicklerTests):
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unpickler = _pickle.Unpickler
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bad_stack_errors = (pickle.UnpicklingError,)
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truncated_errors = (pickle.UnpicklingError,)
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class CPicklerTests(PyPicklerTests):
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pickler = _pickle.Pickler
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unpickler = _pickle.Unpickler
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class CPersPicklerTests(PyPersPicklerTests):
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pickler = _pickle.Pickler
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unpickler = _pickle.Unpickler
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class CIdPersPicklerTests(PyIdPersPicklerTests):
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pickler = _pickle.Pickler
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unpickler = _pickle.Unpickler
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persistent_load_error = _pickle.UnpicklingError
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class CDumpPickle_LoadPickle(PyPicklerTests):
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pickler = _pickle.Pickler
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unpickler = pickle._Unpickler
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class DumpPickle_CLoadPickle(PyPicklerTests):
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pickler = pickle._Pickler
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unpickler = _pickle.Unpickler
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class CPicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests, unittest.TestCase):
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pickler_class = _pickle.Pickler
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unpickler_class = _pickle.Unpickler
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def test_issue18339(self):
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unpickler = self.unpickler_class(io.BytesIO())
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with self.assertRaises(TypeError):
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unpickler.memo = object
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# used to cause a segfault
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with self.assertRaises(ValueError):
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unpickler.memo = {-1: None}
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unpickler.memo = {1: None}
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class CDispatchTableTests(AbstractDispatchTableTests, unittest.TestCase):
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pickler_class = pickle.Pickler
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def get_dispatch_table(self):
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return pickle.dispatch_table.copy()
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class CChainDispatchTableTests(AbstractDispatchTableTests, unittest.TestCase):
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pickler_class = pickle.Pickler
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def get_dispatch_table(self):
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return collections.ChainMap({}, pickle.dispatch_table)
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class CPicklerHookTests(AbstractHookTests, unittest.TestCase):
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class CustomCPicklerClass(_pickle.Pickler, AbstractCustomPicklerClass):
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pass
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pickler_class = CustomCPicklerClass
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@support.cpython_only
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class HeapTypesTests(unittest.TestCase):
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def setUp(self):
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pickler = _pickle.Pickler(io.BytesIO())
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unpickler = _pickle.Unpickler(io.BytesIO())
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self._types = (
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_pickle.Pickler,
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_pickle.Unpickler,
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type(pickler.memo),
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type(unpickler.memo),
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# We cannot test the _pickle.Pdata;
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# there's no way to get to it.
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)
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def test_have_gc(self):
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import gc
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for tp in self._types:
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with self.subTest(tp=tp):
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self.assertTrue(gc.is_tracked(tp))
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def test_immutable(self):
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for tp in self._types:
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with self.subTest(tp=tp):
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with self.assertRaisesRegex(TypeError, "immutable"):
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tp.foo = "bar"
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@support.cpython_only
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class SizeofTests(unittest.TestCase):
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check_sizeof = support.check_sizeof
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def test_pickler(self):
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basesize = support.calcobjsize('6P2n3i2n3i2P')
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p = _pickle.Pickler(io.BytesIO())
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self.assertEqual(object.__sizeof__(p), basesize)
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MT_size = struct.calcsize('3nP0n')
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ME_size = struct.calcsize('Pn0P')
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check = self.check_sizeof
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check(p, basesize +
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MT_size + 8 * ME_size + # Minimal memo table size.
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sys.getsizeof(b'x'*4096)) # Minimal write buffer size.
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for i in range(6):
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p.dump(chr(i))
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check(p, basesize +
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MT_size + 32 * ME_size + # Size of memo table required to
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# save references to 6 objects.
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0) # Write buffer is cleared after every dump().
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def test_unpickler(self):
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basesize = support.calcobjsize('2P2nP 2P2n2i5P 2P3n8P2n2i')
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unpickler = _pickle.Unpickler
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P = struct.calcsize('P') # Size of memo table entry.
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n = struct.calcsize('n') # Size of mark table entry.
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check = self.check_sizeof
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for encoding in 'ASCII', 'UTF-16', 'latin-1':
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for errors in 'strict', 'replace':
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u = unpickler(io.BytesIO(),
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encoding=encoding, errors=errors)
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self.assertEqual(object.__sizeof__(u), basesize)
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check(u, basesize +
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32 * P + # Minimal memo table size.
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len(encoding) + 1 + len(errors) + 1)
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stdsize = basesize + len('ASCII') + 1 + len('strict') + 1
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def check_unpickler(data, memo_size, marks_size):
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dump = pickle.dumps(data)
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u = unpickler(io.BytesIO(dump),
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encoding='ASCII', errors='strict')
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u.load()
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check(u, stdsize + memo_size * P + marks_size * n)
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check_unpickler(0, 32, 0)
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# 20 is minimal non-empty mark stack size.
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check_unpickler([0] * 100, 32, 20)
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# 128 is memo table size required to save references to 100 objects.
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check_unpickler([chr(i) for i in range(100)], 128, 20)
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def recurse(deep):
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data = 0
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for i in range(deep):
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data = [data, data]
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return data
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check_unpickler(recurse(0), 32, 0)
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check_unpickler(recurse(1), 32, 20)
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check_unpickler(recurse(20), 32, 20)
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check_unpickler(recurse(50), 64, 60)
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check_unpickler(recurse(100), 128, 140)
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u = unpickler(io.BytesIO(pickle.dumps('a', 0)),
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encoding='ASCII', errors='strict')
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u.load()
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check(u, stdsize + 32 * P + 2 + 1)
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ALT_IMPORT_MAPPING = {
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('_elementtree', 'xml.etree.ElementTree'),
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('cPickle', 'pickle'),
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('StringIO', 'io'),
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('cStringIO', 'io'),
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}
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ALT_NAME_MAPPING = {
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('__builtin__', 'basestring', 'builtins', 'str'),
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('exceptions', 'StandardError', 'builtins', 'Exception'),
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('UserDict', 'UserDict', 'collections', 'UserDict'),
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('socket', '_socketobject', 'socket', 'SocketType'),
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}
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def mapping(module, name):
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if (module, name) in NAME_MAPPING:
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module, name = NAME_MAPPING[(module, name)]
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elif module in IMPORT_MAPPING:
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module = IMPORT_MAPPING[module]
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return module, name
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def reverse_mapping(module, name):
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if (module, name) in REVERSE_NAME_MAPPING:
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module, name = REVERSE_NAME_MAPPING[(module, name)]
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elif module in REVERSE_IMPORT_MAPPING:
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module = REVERSE_IMPORT_MAPPING[module]
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return module, name
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def getmodule(module):
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try:
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return sys.modules[module]
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except KeyError:
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try:
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with warnings.catch_warnings():
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action = 'always' if support.verbose else 'ignore'
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warnings.simplefilter(action, DeprecationWarning)
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__import__(module)
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except AttributeError as exc:
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if support.verbose:
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print("Can't import module %r: %s" % (module, exc))
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raise ImportError
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except ImportError as exc:
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if support.verbose:
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print(exc)
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raise
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return sys.modules[module]
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def getattribute(module, name):
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obj = getmodule(module)
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for n in name.split('.'):
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obj = getattr(obj, n)
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return obj
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def get_exceptions(mod):
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for name in dir(mod):
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attr = getattr(mod, name)
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if isinstance(attr, type) and issubclass(attr, BaseException):
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yield name, attr
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class CompatPickleTests(unittest.TestCase):
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def test_import(self):
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modules = set(IMPORT_MAPPING.values())
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modules |= set(REVERSE_IMPORT_MAPPING)
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modules |= {module for module, name in REVERSE_NAME_MAPPING}
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modules |= {module for module, name in NAME_MAPPING.values()}
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for module in modules:
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try:
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getmodule(module)
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except ImportError:
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pass
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def test_import_mapping(self):
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for module3, module2 in REVERSE_IMPORT_MAPPING.items():
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with self.subTest((module3, module2)):
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try:
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getmodule(module3)
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except ImportError:
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pass
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if module3[:1] != '_':
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self.assertIn(module2, IMPORT_MAPPING)
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self.assertEqual(IMPORT_MAPPING[module2], module3)
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def test_name_mapping(self):
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for (module3, name3), (module2, name2) in REVERSE_NAME_MAPPING.items():
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with self.subTest(((module3, name3), (module2, name2))):
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if (module2, name2) == ('exceptions', 'OSError'):
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attr = getattribute(module3, name3)
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self.assertTrue(issubclass(attr, OSError))
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elif (module2, name2) == ('exceptions', 'ImportError'):
|
|
attr = getattribute(module3, name3)
|
|
self.assertTrue(issubclass(attr, ImportError))
|
|
else:
|
|
module, name = mapping(module2, name2)
|
|
if module3[:1] != '_':
|
|
self.assertEqual((module, name), (module3, name3))
|
|
try:
|
|
attr = getattribute(module3, name3)
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
self.assertEqual(getattribute(module, name), attr)
|
|
|
|
def test_reverse_import_mapping(self):
|
|
for module2, module3 in IMPORT_MAPPING.items():
|
|
with self.subTest((module2, module3)):
|
|
try:
|
|
getmodule(module3)
|
|
except ImportError as exc:
|
|
if support.verbose:
|
|
print(exc)
|
|
if ((module2, module3) not in ALT_IMPORT_MAPPING and
|
|
REVERSE_IMPORT_MAPPING.get(module3, None) != module2):
|
|
for (m3, n3), (m2, n2) in REVERSE_NAME_MAPPING.items():
|
|
if (module3, module2) == (m3, m2):
|
|
break
|
|
else:
|
|
self.fail('No reverse mapping from %r to %r' %
|
|
(module3, module2))
|
|
module = REVERSE_IMPORT_MAPPING.get(module3, module3)
|
|
module = IMPORT_MAPPING.get(module, module)
|
|
self.assertEqual(module, module3)
|
|
|
|
def test_reverse_name_mapping(self):
|
|
for (module2, name2), (module3, name3) in NAME_MAPPING.items():
|
|
with self.subTest(((module2, name2), (module3, name3))):
|
|
try:
|
|
attr = getattribute(module3, name3)
|
|
except ImportError:
|
|
pass
|
|
module, name = reverse_mapping(module3, name3)
|
|
if (module2, name2, module3, name3) not in ALT_NAME_MAPPING:
|
|
self.assertEqual((module, name), (module2, name2))
|
|
module, name = mapping(module, name)
|
|
self.assertEqual((module, name), (module3, name3))
|
|
|
|
def test_exceptions(self):
|
|
self.assertEqual(mapping('exceptions', 'StandardError'),
|
|
('builtins', 'Exception'))
|
|
self.assertEqual(mapping('exceptions', 'Exception'),
|
|
('builtins', 'Exception'))
|
|
self.assertEqual(reverse_mapping('builtins', 'Exception'),
|
|
('exceptions', 'Exception'))
|
|
self.assertEqual(mapping('exceptions', 'OSError'),
|
|
('builtins', 'OSError'))
|
|
self.assertEqual(reverse_mapping('builtins', 'OSError'),
|
|
('exceptions', 'OSError'))
|
|
|
|
for name, exc in get_exceptions(builtins):
|
|
with self.subTest(name):
|
|
if exc in (BlockingIOError,
|
|
ResourceWarning,
|
|
StopAsyncIteration,
|
|
RecursionError,
|
|
EncodingWarning,
|
|
BaseExceptionGroup,
|
|
ExceptionGroup):
|
|
continue
|
|
if exc is not OSError and issubclass(exc, OSError):
|
|
self.assertEqual(reverse_mapping('builtins', name),
|
|
('exceptions', 'OSError'))
|
|
elif exc is not ImportError and issubclass(exc, ImportError):
|
|
self.assertEqual(reverse_mapping('builtins', name),
|
|
('exceptions', 'ImportError'))
|
|
self.assertEqual(mapping('exceptions', name),
|
|
('exceptions', name))
|
|
else:
|
|
self.assertEqual(reverse_mapping('builtins', name),
|
|
('exceptions', name))
|
|
self.assertEqual(mapping('exceptions', name),
|
|
('builtins', name))
|
|
|
|
def test_multiprocessing_exceptions(self):
|
|
module = import_helper.import_module('multiprocessing.context')
|
|
for name, exc in get_exceptions(module):
|
|
if issubclass(exc, Warning):
|
|
continue
|
|
with self.subTest(name):
|
|
self.assertEqual(reverse_mapping('multiprocessing.context', name),
|
|
('multiprocessing', name))
|
|
self.assertEqual(mapping('multiprocessing', name),
|
|
('multiprocessing.context', name))
|
|
|
|
|
|
def load_tests(loader, tests, pattern):
|
|
tests.addTest(doctest.DocTestSuite())
|
|
return tests
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|