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Merged revisions 64842,64853,64856,64945 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk ........ r64842 | robert.schuppenies | 2008-07-10 15:43:26 +0200 (Thu, 10 Jul 2008) | 2 lines Fixed Issue3122 and extended sys.getsizeof tests for built-in types. ........ r64853 | robert.schuppenies | 2008-07-10 17:24:04 +0200 (Thu, 10 Jul 2008) | 3 lines Added additional __sizeof__ implementations and addressed comments made in Issue3122. ........ r64856 | robert.schuppenies | 2008-07-10 19:13:55 +0200 (Thu, 10 Jul 2008) | 3 lines Added garbage collector overhead and optional default return value to sys.getsizeof. ........ r64945 | robert.schuppenies | 2008-07-14 10:42:18 +0200 (Mon, 14 Jul 2008) | 2 lines Fixed test failure on Win64 machines. ........
This commit is contained in:
Robert Schuppenies
parent
3065b87a07
commit
fbe94c55ca
9 changed files with 342 additions and 103 deletions
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@ -373,6 +373,9 @@ class SysModuleTest(unittest.TestCase):
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class SizeofTest(unittest.TestCase):
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TPFLAGS_HAVE_GC = 1<<14
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TPFLAGS_HEAPTYPE = 1<<9
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def setUp(self):
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self.c = len(struct.pack('c', ' '))
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self.H = len(struct.pack('H', 0))
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@ -382,22 +385,27 @@ class SizeofTest(unittest.TestCase):
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# due to missing size_t information from struct, it is assumed that
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# sizeof(Py_ssize_t) = sizeof(void*)
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self.header = 'PP'
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self.vheader = self.header + 'P'
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if hasattr(sys, "gettotalrefcount"):
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self.header += '2P'
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self.vheader += '2P'
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import _testcapi
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self.gc_headsize = _testcapi.SIZEOF_PYGC_HEAD
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self.file = open(test.support.TESTFN, 'wb')
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def tearDown(self):
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self.file.close()
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test.support.unlink(test.support.TESTFN)
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def check_sizeof(self, o, size, size2=None):
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"""Check size of o. Possible are size and optionally size2)."""
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def check_sizeof(self, o, size):
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result = sys.getsizeof(o)
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msg = 'wrong size for %s: got %d, expected ' % (type(o), result)
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if (size2 != None) and (result != size):
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self.assertEqual(result, size2, msg + str(size2))
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else:
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self.assertEqual(result, size, msg + str(size))
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# add GC header size
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if ((type(o) == type) and (o.__flags__ & self.TPFLAGS_HEAPTYPE) or\
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((type(o) != type) and (type(o).__flags__ & self.TPFLAGS_HAVE_GC))):
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size += self.gc_headsize
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msg = 'wrong size for %s: got %d, expected %d' \
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% (type(o), result, size)
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self.assertEqual(result, size, msg)
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def calcsize(self, fmt):
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"""Wrapper around struct.calcsize which enforces the alignment of the
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@ -408,29 +416,116 @@ class SizeofTest(unittest.TestCase):
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"""
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return struct.calcsize(fmt + '0P')
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def test_standardtypes(self):
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def test_gc_head_size(self):
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# Check that the gc header size is added to objects tracked by the gc.
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h = self.header
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vh = self.vheader
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size = self.calcsize
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gc_header_size = self.gc_headsize
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# bool objects are not gc tracked
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self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
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# but lists are
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self.assertEqual(sys.getsizeof([]), size(vh + 'PP') + gc_header_size)
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def test_default(self):
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h = self.header
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vh = self.vheader
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size = self.calcsize
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self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
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self.assertEqual(sys.getsizeof(True, -1), size(vh) + self.H)
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def test_objecttypes(self):
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# check all types defined in Objects/
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h = self.header
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vh = self.vheader
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size = self.calcsize
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check = self.check_sizeof
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# bool
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check(True, size(vh) + self.H)
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# buffer
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# XXX
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# builtin_function_or_method
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check(len, size(h + '3P'))
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# bytearray
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samples = [b'', b'u'*100000]
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for sample in samples:
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x = bytearray(sample)
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check(x, size(vh + 'iPP') + x.__alloc__() * self.c)
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# bytearray_iterator
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check(iter(bytearray()), size(h + 'PP'))
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# cell
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def get_cell():
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x = 42
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def inner():
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return x
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return inner
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self.check_sizeof(get_cell().__closure__[0], size(h + 'P'))
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check(get_cell().__closure__[0], size(h + 'P'))
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# code
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self.check_sizeof(get_cell().__code__, size(h + '5i8Pi2P'))
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check(get_cell().__code__, size(h + '5i8Pi2P'))
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# complex
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self.check_sizeof(complex(0,1), size(h + '2d'))
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check(complex(0,1), size(h + '2d'))
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# method_descriptor (descriptor object)
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check(str.lower, size(h + '2PP'))
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# classmethod_descriptor (descriptor object)
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# XXX
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# member_descriptor (descriptor object)
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import datetime
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check(datetime.timedelta.days, size(h + '2PP'))
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# getset_descriptor (descriptor object)
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import collections
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check(collections.defaultdict.default_factory, size(h + '2PP'))
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# wrapper_descriptor (descriptor object)
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check(int.__add__, size(h + '2P2P'))
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# method-wrapper (descriptor object)
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check({}.__iter__, size(h + '2P'))
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# dict
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check({}, size(h + '3P2P' + 8*'P2P'))
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longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
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check(longdict, size(h + '3P2P' + 8*'P2P') + 16*size('P2P'))
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# dictionary-keyiterator
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check({}.keys(), size(h + 'P'))
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# dictionary-valueiterator
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check({}.values(), size(h + 'P'))
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# dictionary-itemiterator
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check({}.items(), size(h + 'P'))
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# dictproxy
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class C(object): pass
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check(C.__dict__, size(h + 'P'))
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# BaseException
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check(BaseException(), size(h + '5P'))
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# UnicodeEncodeError
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check(UnicodeEncodeError("", "", 0, 0, ""), size(h + '5P 2P2PP'))
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# UnicodeDecodeError
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# XXX
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# check(UnicodeDecodeError("", "", 0, 0, ""), size(h + '5P2PP'))
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# UnicodeTranslateError
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check(UnicodeTranslateError("", 0, 1, ""), size(h + '5P 2P2PP'))
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# ellipses
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check(Ellipsis, size(h + ''))
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# EncodingMap
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import codecs, encodings.iso8859_3
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x = codecs.charmap_build(encodings.iso8859_3.decoding_table)
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check(x, size(h + '32B2iB'))
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# enumerate
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self.check_sizeof(enumerate([]), size(h + 'l3P'))
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check(enumerate([]), size(h + 'l3P'))
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# reverse
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self.check_sizeof(reversed(''), size(h + 'PP'))
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check(reversed(''), size(h + 'PP'))
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# float
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self.check_sizeof(float(0), size(h + 'd'))
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check(float(0), size(h + 'd'))
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# sys.floatinfo
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check(sys.float_info, size(vh) + self.P * len(sys.float_info))
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# frame
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import inspect
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CO_MAXBLOCKS = 20
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x = inspect.currentframe()
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ncells = len(x.f_code.co_cellvars)
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nfrees = len(x.f_code.co_freevars)
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extras = x.f_code.co_stacksize + x.f_code.co_nlocals +\
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ncells + nfrees - 1
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check(x, size(vh + '12P3i' + CO_MAXBLOCKS*'3i' + 'P' + extras*'P'))
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# function
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def func(): pass
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self.check_sizeof(func, size(h + '11P'))
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check(func, size(h + '11P'))
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class c():
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@staticmethod
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def foo():
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@ -439,40 +534,99 @@ class SizeofTest(unittest.TestCase):
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def bar(cls):
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pass
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# staticmethod
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self.check_sizeof(foo, size(h + 'P'))
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check(foo, size(h + 'P'))
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# classmethod
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self.check_sizeof(bar, size(h + 'P'))
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check(bar, size(h + 'P'))
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# generator
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def get_gen(): yield 1
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self.check_sizeof(get_gen(), size(h + 'Pi2P'))
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# builtin_function_or_method
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self.check_sizeof(abs, size(h + '3P'))
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check(get_gen(), size(h + 'Pi2P'))
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# iterator
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check(iter('abc'), size(h + 'lP'))
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# callable-iterator
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import re
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check(re.finditer('',''), size(h + '2P'))
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# list
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samples = [[], [1,2,3], ['1', '2', '3']]
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for sample in samples:
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check(sample, size(vh + 'PP') + len(sample)*self.P)
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# sortwrapper (list)
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# XXX
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# cmpwrapper (list)
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# XXX
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# listiterator (list)
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check(iter([]), size(h + 'lP'))
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# listreverseiterator (list)
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check(reversed([]), size(h + 'lP'))
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# long
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check(0, size(vh))
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check(1, size(vh) + self.H)
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check(-1, size(vh) + self.H)
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check(32768, size(vh) + 2*self.H)
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check(32768*32768-1, size(vh) + 2*self.H)
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check(32768*32768, size(vh) + 3*self.H)
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# memory
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check(memoryview(b''), size(h + 'P P2P2i5P'))
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# module
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self.check_sizeof(unittest, size(h + '3P'))
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check(unittest, size(h + '3P'))
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# None
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check(None, size(h + ''))
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# NotImplementedType
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check(NotImplemented, size(h))
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# object
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check(object(), size(h + ''))
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# property (descriptor object)
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class C(object):
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def getx(self): return self.__x
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def setx(self, value): self.__x = value
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def delx(self): del self.__x
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x = property(getx, setx, delx, "")
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check(x, size(h + '4Pi'))
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# PyCObject
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# XXX
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# rangeiterator
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check(iter(range(1)), size(h + '4l'))
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# reverse
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check(reversed(''), size(h + 'PP'))
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# range
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self.check_sizeof(range(1), size(h + '3P'))
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check(range(1), size(h + '3P'))
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check(range(66000), size(h + '3l'))
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# set
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# frozenset
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PySet_MINSIZE = 8
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samples = [[], range(10), range(50)]
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s = size(h + '3P2P' + PySet_MINSIZE*'lP' + 'lP')
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for sample in samples:
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minused = len(sample)
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if minused == 0: tmp = 1
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# the computation of minused is actually a bit more complicated
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# but this suffices for the sizeof test
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minused = minused*2
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newsize = PySet_MINSIZE
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while newsize <= minused:
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newsize = newsize << 1
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if newsize <= 8:
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check(set(sample), s)
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check(frozenset(sample), s)
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else:
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check(set(sample), s + newsize*struct.calcsize('lP'))
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check(frozenset(sample), s + newsize*struct.calcsize('lP'))
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# setiterator
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check(iter(set()), size(h + 'P3P'))
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# slice
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self.check_sizeof(slice(0), size(h + '3P'))
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h += 'P'
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# bool
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self.check_sizeof(True, size(h + 'H'))
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# new-style class
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class class_newstyle(object):
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def method():
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pass
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# type (PyTypeObject + PyNumberMethods + PyMappingMethods +
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# PySequenceMethods + PyBufferProcs)
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self.check_sizeof(class_newstyle, size(h + 'P2P15Pl4PP9PP11PI') +\
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size('16Pi17P 3P 10P 2P 2P'))
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def test_specialtypes(self):
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h = self.header
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size = self.calcsize
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# dict
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self.check_sizeof({}, size(h + '3P2P') + 8*size('P2P'))
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longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
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self.check_sizeof(longdict, size(h + '3P2P') + (8+16)*size('P2P'))
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check(slice(0), size(h + '3P'))
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# super
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check(super(int), size(h + '3P'))
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# tuple
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check((), size(vh))
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check((1,2,3), size(vh) + 3*self.P)
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# type
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# (PyTypeObject + PyNumberMethods + PyMappingMethods +
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# PySequenceMethods + PyBufferProcs)
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s = size(vh + 'P2P15Pl4PP9PP11PI') + size('16Pi17P 3P 10P 2P 2P')
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check(int, s)
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# class
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class newstyleclass(object): pass
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check(newstyleclass, s)
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# unicode
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usize = len('\0'.encode('unicode-internal'))
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samples = ['', '1'*100]
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@ -480,31 +634,38 @@ class SizeofTest(unittest.TestCase):
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# has been cached
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for s in samples:
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basicsize = size(h + 'PPliP') + usize * (len(s) + 1)
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defenc = bytes(s, 'ascii')
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self.check_sizeof(s, basicsize,
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size2=basicsize + sys.getsizeof(defenc))
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# trigger caching encoded version as bytes object
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try:
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getattr(sys, s)
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except AttributeError:
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pass
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finally:
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self.check_sizeof(s, basicsize + sys.getsizeof(defenc))
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check(s, basicsize)
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# weakref
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import weakref
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check(weakref.ref(int), size(h + '2Pl2P'))
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# weakproxy
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# XXX
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# weakcallableproxy
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check(weakref.proxy(int), size(h + '2Pl2P'))
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h += 'P'
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# list
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self.check_sizeof([], size(h + 'PP'))
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self.check_sizeof([1, 2, 3], size(h + 'PP') + 3*self.P)
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# long
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self.check_sizeof(0, size(h + 'H'))
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self.check_sizeof(1, size(h + 'H'))
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self.check_sizeof(-1, size(h + 'H'))
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self.check_sizeof(32768, size(h + 'H') + self.H)
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self.check_sizeof(32768*32768-1, size(h + 'H') + self.H)
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self.check_sizeof(32768*32768, size(h + 'H') + 2*self.H)
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# tuple
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self.check_sizeof((), size(h))
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self.check_sizeof((1,2,3), size(h) + 3*self.P)
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def test_pythontypes(self):
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# check all types defined in Python/
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h = self.header
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vh = self.vheader
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size = self.calcsize
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check = self.check_sizeof
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# _ast.AST
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import _ast
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check(_ast.AST(), size(h + ''))
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# imp.NullImporter
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import imp
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check(imp.NullImporter(self.file.name), size(h + ''))
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try:
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raise TypeError
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except TypeError:
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tb = sys.exc_info()[2]
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# traceback
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if tb != None:
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check(tb, size(h + '2P2i'))
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# symtable entry
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# XXX
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# sys.flags
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check(sys.flags, size(vh) + self.P * len(sys.flags))
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def test_main():
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