from test import support from test.support import os_helper, requires_debug_ranges from test.support.script_helper import assert_python_ok import array import io import marshal import sys import unittest import os import types import textwrap try: import _testcapi except ImportError: _testcapi = None class HelperMixin: def helper(self, sample, *extra): new = marshal.loads(marshal.dumps(sample, *extra)) self.assertEqual(sample, new) try: with open(os_helper.TESTFN, "wb") as f: marshal.dump(sample, f, *extra) with open(os_helper.TESTFN, "rb") as f: new = marshal.load(f) self.assertEqual(sample, new) finally: os_helper.unlink(os_helper.TESTFN) class IntTestCase(unittest.TestCase, HelperMixin): def test_ints(self): # Test a range of Python ints larger than the machine word size. n = sys.maxsize ** 2 while n: for expected in (-n, n): self.helper(expected) n = n >> 1 def test_int64(self): # Simulate int marshaling with TYPE_INT64. maxint64 = (1 << 63) - 1 minint64 = -maxint64-1 for base in maxint64, minint64, -maxint64, -(minint64 >> 1): while base: s = b'I' + int.to_bytes(base, 8, 'little', signed=True) got = marshal.loads(s) self.assertEqual(base, got) if base == -1: # a fixed-point for shifting right 1 base = 0 else: base >>= 1 got = marshal.loads(b'I\xfe\xdc\xba\x98\x76\x54\x32\x10') self.assertEqual(got, 0x1032547698badcfe) got = marshal.loads(b'I\x01\x23\x45\x67\x89\xab\xcd\xef') self.assertEqual(got, -0x1032547698badcff) got = marshal.loads(b'I\x08\x19\x2a\x3b\x4c\x5d\x6e\x7f') self.assertEqual(got, 0x7f6e5d4c3b2a1908) got = marshal.loads(b'I\xf7\xe6\xd5\xc4\xb3\xa2\x91\x80') self.assertEqual(got, -0x7f6e5d4c3b2a1909) def test_bool(self): for b in (True, False): self.helper(b) class FloatTestCase(unittest.TestCase, HelperMixin): def test_floats(self): # Test a few floats small = 1e-25 n = sys.maxsize * 3.7e250 while n > small: for expected in (-n, n): self.helper(float(expected)) n /= 123.4567 f = 0.0 s = marshal.dumps(f, 2) got = marshal.loads(s) self.assertEqual(f, got) # and with version <= 1 (floats marshalled differently then) s = marshal.dumps(f, 1) got = marshal.loads(s) self.assertEqual(f, got) n = sys.maxsize * 3.7e-250 while n < small: for expected in (-n, n): f = float(expected) self.helper(f) self.helper(f, 1) n *= 123.4567 class StringTestCase(unittest.TestCase, HelperMixin): def test_unicode(self): for s in ["", "Andr\xe8 Previn", "abc", " "*10000]: self.helper(marshal.loads(marshal.dumps(s))) def test_string(self): for s in ["", "Andr\xe8 Previn", "abc", " "*10000]: self.helper(s) def test_bytes(self): for s in [b"", b"Andr\xe8 Previn", b"abc", b" "*10000]: self.helper(s) class ExceptionTestCase(unittest.TestCase): def test_exceptions(self): new = marshal.loads(marshal.dumps(StopIteration)) self.assertEqual(StopIteration, new) class CodeTestCase(unittest.TestCase): def test_code(self): co = ExceptionTestCase.test_exceptions.__code__ new = marshal.loads(marshal.dumps(co)) self.assertEqual(co, new) def test_many_codeobjects(self): # Issue2957: bad recursion count on code objects count = 5000 # more than MAX_MARSHAL_STACK_DEPTH codes = (ExceptionTestCase.test_exceptions.__code__,) * count marshal.loads(marshal.dumps(codes)) def test_different_filenames(self): co1 = compile("x", "f1", "exec") co2 = compile("y", "f2", "exec") co1, co2 = marshal.loads(marshal.dumps((co1, co2))) self.assertEqual(co1.co_filename, "f1") self.assertEqual(co2.co_filename, "f2") @requires_debug_ranges() def test_minimal_linetable_with_no_debug_ranges(self): # Make sure when demarshalling objects with `-X no_debug_ranges` # that the columns are None. co = ExceptionTestCase.test_exceptions.__code__ code = textwrap.dedent(""" import sys import marshal with open(sys.argv[1], 'rb') as f: co = marshal.load(f) positions = list(co.co_positions()) assert positions[0][2] is None assert positions[0][3] is None """) try: with open(os_helper.TESTFN, 'wb') as f: marshal.dump(co, f) assert_python_ok('-X', 'no_debug_ranges', '-c', code, os_helper.TESTFN) finally: os_helper.unlink(os_helper.TESTFN) @support.cpython_only def test_same_filename_used(self): s = """def f(): pass\ndef g(): pass""" co = compile(s, "myfile", "exec") co = marshal.loads(marshal.dumps(co)) for obj in co.co_consts: if isinstance(obj, types.CodeType): self.assertIs(co.co_filename, obj.co_filename) class ContainerTestCase(unittest.TestCase, HelperMixin): d = {'astring': 'foo@bar.baz.spam', 'afloat': 7283.43, 'anint': 2**20, 'ashortlong': 2, 'alist': ['.zyx.41'], 'atuple': ('.zyx.41',)*10, 'aboolean': False, 'aunicode': "Andr\xe8 Previn" } def test_dict(self): self.helper(self.d) def test_list(self): self.helper(list(self.d.items())) def test_tuple(self): self.helper(tuple(self.d.keys())) def test_sets(self): for constructor in (set, frozenset): self.helper(constructor(self.d.keys())) class BufferTestCase(unittest.TestCase, HelperMixin): def test_bytearray(self): b = bytearray(b"abc") self.helper(b) new = marshal.loads(marshal.dumps(b)) self.assertEqual(type(new), bytes) def test_memoryview(self): b = memoryview(b"abc") self.helper(b) new = marshal.loads(marshal.dumps(b)) self.assertEqual(type(new), bytes) def test_array(self): a = array.array('B', b"abc") new = marshal.loads(marshal.dumps(a)) self.assertEqual(new, b"abc") class BugsTestCase(unittest.TestCase): def test_bug_5888452(self): # Simple-minded check for SF 588452: Debug build crashes marshal.dumps([128] * 1000) def test_patch_873224(self): self.assertRaises(Exception, marshal.loads, b'0') self.assertRaises(Exception, marshal.loads, b'f') self.assertRaises(Exception, marshal.loads, marshal.dumps(2**65)[:-1]) def test_version_argument(self): # Python 2.4.0 crashes for any call to marshal.dumps(x, y) self.assertEqual(marshal.loads(marshal.dumps(5, 0)), 5) self.assertEqual(marshal.loads(marshal.dumps(5, 1)), 5) def test_fuzz(self): # simple test that it's at least not *totally* trivial to # crash from bad marshal data for i in range(256): c = bytes([i]) try: marshal.loads(c) except Exception: pass def test_loads_recursion(self): def run_tests(N, check): # (((...None...),),) check(b')\x01' * N + b'N') check(b'(\x01\x00\x00\x00' * N + b'N') # [[[...None...]]] check(b'[\x01\x00\x00\x00' * N + b'N') # {None: {None: {None: ...None...}}} check(b'{N' * N + b'N' + b'0' * N) # frozenset([frozenset([frozenset([...None...])])]) check(b'>\x01\x00\x00\x00' * N + b'N') # Check that the generated marshal data is valid and marshal.loads() # works for moderately deep nesting run_tests(100, marshal.loads) # Very deeply nested structure shouldn't blow the stack def check(s): self.assertRaises(ValueError, marshal.loads, s) run_tests(2**20, check) def test_recursion_limit(self): # Create a deeply nested structure. head = last = [] # The max stack depth should match the value in Python/marshal.c. # BUG: https://bugs.python.org/issue33720 # Windows always limits the maximum depth on release and debug builds #if os.name == 'nt' and support.Py_DEBUG: if os.name == 'nt': MAX_MARSHAL_STACK_DEPTH = 1000 else: MAX_MARSHAL_STACK_DEPTH = 2000 for i in range(MAX_MARSHAL_STACK_DEPTH - 2): last.append([0]) last = last[-1] # Verify we don't blow out the stack with dumps/load. data = marshal.dumps(head) new_head = marshal.loads(data) # Don't use == to compare objects, it can exceed the recursion limit. self.assertEqual(len(new_head), len(head)) self.assertEqual(len(new_head[0]), len(head[0])) self.assertEqual(len(new_head[-1]), len(head[-1])) last.append([0]) self.assertRaises(ValueError, marshal.dumps, head) def test_exact_type_match(self): # Former bug: # >>> class Int(int): pass # >>> type(loads(dumps(Int()))) # for typ in (int, float, complex, tuple, list, dict, set, frozenset): # Note: str subclasses are not tested because they get handled # by marshal's routines for objects supporting the buffer API. subtyp = type('subtyp', (typ,), {}) self.assertRaises(ValueError, marshal.dumps, subtyp()) # Issue #1792 introduced a change in how marshal increases the size of its # internal buffer; this test ensures that the new code is exercised. def test_large_marshal(self): size = int(1e6) testString = 'abc' * size marshal.dumps(testString) def test_invalid_longs(self): # Issue #7019: marshal.loads shouldn't produce unnormalized PyLongs invalid_string = b'l\x02\x00\x00\x00\x00\x00\x00\x00' self.assertRaises(ValueError, marshal.loads, invalid_string) def test_multiple_dumps_and_loads(self): # Issue 12291: marshal.load() should be callable multiple times # with interleaved data written by non-marshal code # Adapted from a patch by Engelbert Gruber. data = (1, 'abc', b'def', 1.0, (2, 'a', ['b', b'c'])) for interleaved in (b'', b'0123'): ilen = len(interleaved) positions = [] try: with open(os_helper.TESTFN, 'wb') as f: for d in data: marshal.dump(d, f) if ilen: f.write(interleaved) positions.append(f.tell()) with open(os_helper.TESTFN, 'rb') as f: for i, d in enumerate(data): self.assertEqual(d, marshal.load(f)) if ilen: f.read(ilen) self.assertEqual(positions[i], f.tell()) finally: os_helper.unlink(os_helper.TESTFN) def test_loads_reject_unicode_strings(self): # Issue #14177: marshal.loads() should not accept unicode strings unicode_string = 'T' self.assertRaises(TypeError, marshal.loads, unicode_string) def test_bad_reader(self): class BadReader(io.BytesIO): def readinto(self, buf): n = super().readinto(buf) if n is not None and n > 4: n += 10**6 return n for value in (1.0, 1j, b'0123456789', '0123456789'): self.assertRaises(ValueError, marshal.load, BadReader(marshal.dumps(value))) def test_eof(self): data = marshal.dumps(("hello", "dolly", None)) for i in range(len(data)): self.assertRaises(EOFError, marshal.loads, data[0: i]) def test_deterministic_sets(self): # bpo-37596: To support reproducible builds, sets and frozensets need to # have their elements serialized in a consistent order (even when they # have been scrambled by hash randomization): for kind in ("set", "frozenset"): for elements in ( "float('nan'), b'a', b'b', b'c', 'x', 'y', 'z'", # Also test for bad interactions with backreferencing: "('Spam', 0), ('Spam', 1), ('Spam', 2)", ): s = f"{kind}([{elements}])" with self.subTest(s): # First, make sure that our test case still has different # orders under hash seeds 0 and 1. If this check fails, we # need to update this test with different elements. Skip # this part if we are configured to use any other hash # algorithm (for example, using Py_HASH_EXTERNAL): if sys.hash_info.algorithm in {"fnv", "siphash24"}: args = ["-c", f"print({s})"] _, repr_0, _ = assert_python_ok(*args, PYTHONHASHSEED="0") _, repr_1, _ = assert_python_ok(*args, PYTHONHASHSEED="1") self.assertNotEqual(repr_0, repr_1) # Then, perform the actual test: args = ["-c", f"import marshal; print(marshal.dumps({s}))"] _, dump_0, _ = assert_python_ok(*args, PYTHONHASHSEED="0") _, dump_1, _ = assert_python_ok(*args, PYTHONHASHSEED="1") self.assertEqual(dump_0, dump_1) LARGE_SIZE = 2**31 pointer_size = 8 if sys.maxsize > 0xFFFFFFFF else 4 class NullWriter: def write(self, s): pass @unittest.skipIf(LARGE_SIZE > sys.maxsize, "test cannot run on 32-bit systems") class LargeValuesTestCase(unittest.TestCase): def check_unmarshallable(self, data): self.assertRaises(ValueError, marshal.dump, data, NullWriter()) @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) def test_bytes(self, size): self.check_unmarshallable(b'x' * size) @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) def test_str(self, size): self.check_unmarshallable('x' * size) @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False) def test_tuple(self, size): self.check_unmarshallable((None,) * size) @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False) def test_list(self, size): self.check_unmarshallable([None] * size) @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1), dry_run=False) def test_set(self, size): self.check_unmarshallable(set(range(size))) @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1), dry_run=False) def test_frozenset(self, size): self.check_unmarshallable(frozenset(range(size))) @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) def test_bytearray(self, size): self.check_unmarshallable(bytearray(size)) def CollectObjectIDs(ids, obj): """Collect object ids seen in a structure""" if id(obj) in ids: return ids.add(id(obj)) if isinstance(obj, (list, tuple, set, frozenset)): for e in obj: CollectObjectIDs(ids, e) elif isinstance(obj, dict): for k, v in obj.items(): CollectObjectIDs(ids, k) CollectObjectIDs(ids, v) return len(ids) class InstancingTestCase(unittest.TestCase, HelperMixin): keys = (123, 1.2345, 'abc', (123, 'abc'), frozenset({123, 'abc'})) def helper3(self, rsample, recursive=False, simple=False): #we have two instances sample = (rsample, rsample) n0 = CollectObjectIDs(set(), sample) for v in range(3, marshal.version + 1): s3 = marshal.dumps(sample, v) n3 = CollectObjectIDs(set(), marshal.loads(s3)) #same number of instances generated self.assertEqual(n3, n0) if not recursive: #can compare with version 2 s2 = marshal.dumps(sample, 2) n2 = CollectObjectIDs(set(), marshal.loads(s2)) #old format generated more instances self.assertGreater(n2, n0) #if complex objects are in there, old format is larger if not simple: self.assertGreater(len(s2), len(s3)) else: self.assertGreaterEqual(len(s2), len(s3)) def testInt(self): intobj = 123321 self.helper(intobj) self.helper3(intobj, simple=True) def testFloat(self): floatobj = 1.2345 self.helper(floatobj) self.helper3(floatobj) def testStr(self): strobj = "abcde"*3 self.helper(strobj) self.helper3(strobj) def testBytes(self): bytesobj = b"abcde"*3 self.helper(bytesobj) self.helper3(bytesobj) def testList(self): for obj in self.keys: listobj = [obj, obj] self.helper(listobj) self.helper3(listobj) def testTuple(self): for obj in self.keys: tupleobj = (obj, obj) self.helper(tupleobj) self.helper3(tupleobj) def testSet(self): for obj in self.keys: setobj = {(obj, 1), (obj, 2)} self.helper(setobj) self.helper3(setobj) def testFrozenSet(self): for obj in self.keys: frozensetobj = frozenset({(obj, 1), (obj, 2)}) self.helper(frozensetobj) self.helper3(frozensetobj) def testDict(self): for obj in self.keys: dictobj = {"hello": obj, "goodbye": obj, obj: "hello"} self.helper(dictobj) self.helper3(dictobj) def testModule(self): with open(__file__, "rb") as f: code = f.read() if __file__.endswith(".py"): code = compile(code, __file__, "exec") self.helper(code) self.helper3(code) def testRecursion(self): obj = 1.2345 d = {"hello": obj, "goodbye": obj, obj: "hello"} d["self"] = d self.helper3(d, recursive=True) l = [obj, obj] l.append(l) self.helper3(l, recursive=True) class CompatibilityTestCase(unittest.TestCase): def _test(self, version): with open(__file__, "rb") as f: code = f.read() if __file__.endswith(".py"): code = compile(code, __file__, "exec") data = marshal.dumps(code, version) marshal.loads(data) def test0To3(self): self._test(0) def test1To3(self): self._test(1) def test2To3(self): self._test(2) def test3To3(self): self._test(3) class InterningTestCase(unittest.TestCase, HelperMixin): strobj = "this is an interned string" strobj = sys.intern(strobj) def testIntern(self): s = marshal.loads(marshal.dumps(self.strobj)) self.assertEqual(s, self.strobj) self.assertEqual(id(s), id(self.strobj)) s2 = sys.intern(s) self.assertEqual(id(s2), id(s)) def testNoIntern(self): s = marshal.loads(marshal.dumps(self.strobj, 2)) self.assertEqual(s, self.strobj) self.assertNotEqual(id(s), id(self.strobj)) s2 = sys.intern(s) self.assertNotEqual(id(s2), id(s)) @support.cpython_only @unittest.skipUnless(_testcapi, 'requires _testcapi') class CAPI_TestCase(unittest.TestCase, HelperMixin): def test_write_long_to_file(self): for v in range(marshal.version + 1): _testcapi.pymarshal_write_long_to_file(0x12345678, os_helper.TESTFN, v) with open(os_helper.TESTFN, 'rb') as f: data = f.read() os_helper.unlink(os_helper.TESTFN) self.assertEqual(data, b'\x78\x56\x34\x12') def test_write_object_to_file(self): obj = ('\u20ac', b'abc', 123, 45.6, 7+8j, 'long line '*1000) for v in range(marshal.version + 1): _testcapi.pymarshal_write_object_to_file(obj, os_helper.TESTFN, v) with open(os_helper.TESTFN, 'rb') as f: data = f.read() os_helper.unlink(os_helper.TESTFN) self.assertEqual(marshal.loads(data), obj) def test_read_short_from_file(self): with open(os_helper.TESTFN, 'wb') as f: f.write(b'\x34\x12xxxx') r, p = _testcapi.pymarshal_read_short_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) self.assertEqual(r, 0x1234) self.assertEqual(p, 2) with open(os_helper.TESTFN, 'wb') as f: f.write(b'\x12') with self.assertRaises(EOFError): _testcapi.pymarshal_read_short_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) def test_read_long_from_file(self): with open(os_helper.TESTFN, 'wb') as f: f.write(b'\x78\x56\x34\x12xxxx') r, p = _testcapi.pymarshal_read_long_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) self.assertEqual(r, 0x12345678) self.assertEqual(p, 4) with open(os_helper.TESTFN, 'wb') as f: f.write(b'\x56\x34\x12') with self.assertRaises(EOFError): _testcapi.pymarshal_read_long_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) def test_read_last_object_from_file(self): obj = ('\u20ac', b'abc', 123, 45.6, 7+8j) for v in range(marshal.version + 1): data = marshal.dumps(obj, v) with open(os_helper.TESTFN, 'wb') as f: f.write(data + b'xxxx') r, p = _testcapi.pymarshal_read_last_object_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) self.assertEqual(r, obj) with open(os_helper.TESTFN, 'wb') as f: f.write(data[:1]) with self.assertRaises(EOFError): _testcapi.pymarshal_read_last_object_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) def test_read_object_from_file(self): obj = ('\u20ac', b'abc', 123, 45.6, 7+8j) for v in range(marshal.version + 1): data = marshal.dumps(obj, v) with open(os_helper.TESTFN, 'wb') as f: f.write(data + b'xxxx') r, p = _testcapi.pymarshal_read_object_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) self.assertEqual(r, obj) self.assertEqual(p, len(data)) with open(os_helper.TESTFN, 'wb') as f: f.write(data[:1]) with self.assertRaises(EOFError): _testcapi.pymarshal_read_object_from_file(os_helper.TESTFN) os_helper.unlink(os_helper.TESTFN) if __name__ == "__main__": unittest.main()