class SizeofTest(unittest.TestCase):
+ TPFLAGS_HAVE_GC = 1<<14
+ TPFLAGS_HEAPTYPE = 1<<9
+
def setUp(self):
self.c = len(struct.pack('c', ' '))
self.H = len(struct.pack('H', 0))
# due to missing size_t information from struct, it is assumed that
# sizeof(Py_ssize_t) = sizeof(void*)
self.header = 'PP'
+ self.vheader = self.header + 'P'
if hasattr(sys, "gettotalrefcount"):
self.header += '2P'
+ self.vheader += '2P'
+ import _testcapi
+ self.gc_headsize = _testcapi.SIZEOF_PYGC_HEAD
self.file = open(test.support.TESTFN, 'wb')
def tearDown(self):
self.file.close()
test.support.unlink(test.support.TESTFN)
- def check_sizeof(self, o, size, size2=None):
- """Check size of o. Possible are size and optionally size2)."""
+ def check_sizeof(self, o, size):
result = sys.getsizeof(o)
- msg = 'wrong size for %s: got %d, expected ' % (type(o), result)
- if (size2 != None) and (result != size):
- self.assertEqual(result, size2, msg + str(size2))
- else:
- self.assertEqual(result, size, msg + str(size))
+ # add GC header size
+ if ((type(o) == type) and (o.__flags__ & self.TPFLAGS_HEAPTYPE) or\
+ ((type(o) != type) and (type(o).__flags__ & self.TPFLAGS_HAVE_GC))):
+ size += self.gc_headsize
+ msg = 'wrong size for %s: got %d, expected %d' \
+ % (type(o), result, size)
+ self.assertEqual(result, size, msg)
def calcsize(self, fmt):
"""Wrapper around struct.calcsize which enforces the alignment of the
"""
return struct.calcsize(fmt + '0P')
- def test_standardtypes(self):
+ def test_gc_head_size(self):
+ # Check that the gc header size is added to objects tracked by the gc.
+ h = self.header
+ vh = self.vheader
+ size = self.calcsize
+ gc_header_size = self.gc_headsize
+ # bool objects are not gc tracked
+ self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
+ # but lists are
+ self.assertEqual(sys.getsizeof([]), size(vh + 'PP') + gc_header_size)
+
+ def test_default(self):
h = self.header
+ vh = self.vheader
size = self.calcsize
+ self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
+ self.assertEqual(sys.getsizeof(True, -1), size(vh) + self.H)
+
+ def test_objecttypes(self):
+ # check all types defined in Objects/
+ h = self.header
+ vh = self.vheader
+ size = self.calcsize
+ check = self.check_sizeof
+ # bool
+ check(True, size(vh) + self.H)
+ # buffer
+ # XXX
+ # builtin_function_or_method
+ check(len, size(h + '3P'))
+ # bytearray
+ samples = [b'', b'u'*100000]
+ for sample in samples:
+ x = bytearray(sample)
+ check(x, size(vh + 'iPP') + x.__alloc__() * self.c)
+ # bytearray_iterator
+ check(iter(bytearray()), size(h + 'PP'))
# cell
def get_cell():
x = 42
def inner():
return x
return inner
- self.check_sizeof(get_cell().__closure__[0], size(h + 'P'))
+ check(get_cell().__closure__[0], size(h + 'P'))
# code
- self.check_sizeof(get_cell().__code__, size(h + '5i8Pi2P'))
+ check(get_cell().__code__, size(h + '5i8Pi2P'))
# complex
- self.check_sizeof(complex(0,1), size(h + '2d'))
+ check(complex(0,1), size(h + '2d'))
+ # method_descriptor (descriptor object)
+ check(str.lower, size(h + '2PP'))
+ # classmethod_descriptor (descriptor object)
+ # XXX
+ # member_descriptor (descriptor object)
+ import datetime
+ check(datetime.timedelta.days, size(h + '2PP'))
+ # getset_descriptor (descriptor object)
+ import collections
+ check(collections.defaultdict.default_factory, size(h + '2PP'))
+ # wrapper_descriptor (descriptor object)
+ check(int.__add__, size(h + '2P2P'))
+ # method-wrapper (descriptor object)
+ check({}.__iter__, size(h + '2P'))
+ # dict
+ check({}, size(h + '3P2P' + 8*'P2P'))
+ longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
+ check(longdict, size(h + '3P2P' + 8*'P2P') + 16*size('P2P'))
+ # dictionary-keyiterator
+ check({}.keys(), size(h + 'P'))
+ # dictionary-valueiterator
+ check({}.values(), size(h + 'P'))
+ # dictionary-itemiterator
+ check({}.items(), size(h + 'P'))
+ # dictproxy
+ class C(object): pass
+ check(C.__dict__, size(h + 'P'))
+ # BaseException
+ check(BaseException(), size(h + '5P'))
+ # UnicodeEncodeError
+ check(UnicodeEncodeError("", "", 0, 0, ""), size(h + '5P 2P2PP'))
+ # UnicodeDecodeError
+ # XXX
+# check(UnicodeDecodeError("", "", 0, 0, ""), size(h + '5P2PP'))
+ # UnicodeTranslateError
+ check(UnicodeTranslateError("", 0, 1, ""), size(h + '5P 2P2PP'))
+ # ellipses
+ check(Ellipsis, size(h + ''))
+ # EncodingMap
+ import codecs, encodings.iso8859_3
+ x = codecs.charmap_build(encodings.iso8859_3.decoding_table)
+ check(x, size(h + '32B2iB'))
# enumerate
- self.check_sizeof(enumerate([]), size(h + 'l3P'))
+ check(enumerate([]), size(h + 'l3P'))
# reverse
- self.check_sizeof(reversed(''), size(h + 'PP'))
+ check(reversed(''), size(h + 'PP'))
# float
- self.check_sizeof(float(0), size(h + 'd'))
+ check(float(0), size(h + 'd'))
+ # sys.floatinfo
+ check(sys.float_info, size(vh) + self.P * len(sys.float_info))
+ # frame
+ import inspect
+ CO_MAXBLOCKS = 20
+ x = inspect.currentframe()
+ ncells = len(x.f_code.co_cellvars)
+ nfrees = len(x.f_code.co_freevars)
+ extras = x.f_code.co_stacksize + x.f_code.co_nlocals +\
+ ncells + nfrees - 1
+ check(x, size(vh + '12P3i' + CO_MAXBLOCKS*'3i' + 'P' + extras*'P'))
# function
def func(): pass
- self.check_sizeof(func, size(h + '11P'))
+ check(func, size(h + '11P'))
class c():
@staticmethod
def foo():
def bar(cls):
pass
# staticmethod
- self.check_sizeof(foo, size(h + 'P'))
+ check(foo, size(h + 'P'))
# classmethod
- self.check_sizeof(bar, size(h + 'P'))
+ check(bar, size(h + 'P'))
# generator
def get_gen(): yield 1
- self.check_sizeof(get_gen(), size(h + 'Pi2P'))
- # builtin_function_or_method
- self.check_sizeof(abs, size(h + '3P'))
+ check(get_gen(), size(h + 'Pi2P'))
+ # iterator
+ check(iter('abc'), size(h + 'lP'))
+ # callable-iterator
+ import re
+ check(re.finditer('',''), size(h + '2P'))
+ # list
+ samples = [[], [1,2,3], ['1', '2', '3']]
+ for sample in samples:
+ check(sample, size(vh + 'PP') + len(sample)*self.P)
+ # sortwrapper (list)
+ # XXX
+ # cmpwrapper (list)
+ # XXX
+ # listiterator (list)
+ check(iter([]), size(h + 'lP'))
+ # listreverseiterator (list)
+ check(reversed([]), size(h + 'lP'))
+ # long
+ check(0, size(vh))
+ check(1, size(vh) + self.H)
+ check(-1, size(vh) + self.H)
+ check(32768, size(vh) + 2*self.H)
+ check(32768*32768-1, size(vh) + 2*self.H)
+ check(32768*32768, size(vh) + 3*self.H)
+ # memory
+ check(memoryview(b''), size(h + 'P P2P2i5P'))
# module
- self.check_sizeof(unittest, size(h + '3P'))
+ check(unittest, size(h + '3P'))
+ # None
+ check(None, size(h + ''))
+ # NotImplementedType
+ check(NotImplemented, size(h))
+ # object
+ check(object(), size(h + ''))
+ # property (descriptor object)
+ class C(object):
+ def getx(self): return self.__x
+ def setx(self, value): self.__x = value
+ def delx(self): del self.__x
+ x = property(getx, setx, delx, "")
+ check(x, size(h + '4Pi'))
+ # PyCObject
+ # XXX
+ # rangeiterator
+ check(iter(range(1)), size(h + '4l'))
+ # reverse
+ check(reversed(''), size(h + 'PP'))
# range
- self.check_sizeof(range(1), size(h + '3P'))
+ check(range(1), size(h + '3P'))
+ check(range(66000), size(h + '3l'))
+ # set
+ # frozenset
+ PySet_MINSIZE = 8
+ samples = [[], range(10), range(50)]
+ s = size(h + '3P2P' + PySet_MINSIZE*'lP' + 'lP')
+ for sample in samples:
+ minused = len(sample)
+ if minused == 0: tmp = 1
+ # the computation of minused is actually a bit more complicated
+ # but this suffices for the sizeof test
+ minused = minused*2
+ newsize = PySet_MINSIZE
+ while newsize <= minused:
+ newsize = newsize << 1
+ if newsize <= 8:
+ check(set(sample), s)
+ check(frozenset(sample), s)
+ else:
+ check(set(sample), s + newsize*struct.calcsize('lP'))
+ check(frozenset(sample), s + newsize*struct.calcsize('lP'))
+ # setiterator
+ check(iter(set()), size(h + 'P3P'))
# slice
- self.check_sizeof(slice(0), size(h + '3P'))
-
- h += 'P'
- # bool
- self.check_sizeof(True, size(h + 'H'))
- # new-style class
- class class_newstyle(object):
- def method():
- pass
- # type (PyTypeObject + PyNumberMethods + PyMappingMethods +
- # PySequenceMethods + PyBufferProcs)
- self.check_sizeof(class_newstyle, size(h + 'P2P15Pl4PP9PP11PI') +\
- size('16Pi17P 3P 10P 2P 2P'))
-
- def test_specialtypes(self):
- h = self.header
- size = self.calcsize
- # dict
- self.check_sizeof({}, size(h + '3P2P') + 8*size('P2P'))
- longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
- self.check_sizeof(longdict, size(h + '3P2P') + (8+16)*size('P2P'))
+ check(slice(0), size(h + '3P'))
+ # super
+ check(super(int), size(h + '3P'))
+ # tuple
+ check((), size(vh))
+ check((1,2,3), size(vh) + 3*self.P)
+ # type
+ # (PyTypeObject + PyNumberMethods + PyMappingMethods +
+ # PySequenceMethods + PyBufferProcs)
+ s = size(vh + 'P2P15Pl4PP9PP11PI') + size('16Pi17P 3P 10P 2P 2P')
+ check(int, s)
+ # class
+ class newstyleclass(object): pass
+ check(newstyleclass, s)
# unicode
usize = len('\0'.encode('unicode-internal'))
samples = ['', '1'*100]
# has been cached
for s in samples:
basicsize = size(h + 'PPliP') + usize * (len(s) + 1)
- defenc = bytes(s, 'ascii')
- self.check_sizeof(s, basicsize,
- size2=basicsize + sys.getsizeof(defenc))
- # trigger caching encoded version as bytes object
- try:
- getattr(sys, s)
- except AttributeError:
- pass
- finally:
- self.check_sizeof(s, basicsize + sys.getsizeof(defenc))
-
- h += 'P'
- # list
- self.check_sizeof([], size(h + 'PP'))
- self.check_sizeof([1, 2, 3], size(h + 'PP') + 3*self.P)
- # long
- self.check_sizeof(0, size(h + 'H'))
- self.check_sizeof(1, size(h + 'H'))
- self.check_sizeof(-1, size(h + 'H'))
- self.check_sizeof(32768, size(h + 'H') + self.H)
- self.check_sizeof(32768*32768-1, size(h + 'H') + self.H)
- self.check_sizeof(32768*32768, size(h + 'H') + 2*self.H)
- # tuple
- self.check_sizeof((), size(h))
- self.check_sizeof((1,2,3), size(h) + 3*self.P)
+ check(s, basicsize)
+ # weakref
+ import weakref
+ check(weakref.ref(int), size(h + '2Pl2P'))
+ # weakproxy
+ # XXX
+ # weakcallableproxy
+ check(weakref.proxy(int), size(h + '2Pl2P'))
+
+ def test_pythontypes(self):
+ # check all types defined in Python/
+ h = self.header
+ vh = self.vheader
+ size = self.calcsize
+ check = self.check_sizeof
+ # _ast.AST
+ import _ast
+ check(_ast.AST(), size(h + ''))
+ # imp.NullImporter
+ import imp
+ check(imp.NullImporter(self.file.name), size(h + ''))
+ try:
+ raise TypeError
+ except TypeError:
+ tb = sys.exc_info()[2]
+ # traceback
+ if tb != None:
+ check(tb, size(h + '2P2i'))
+ # symtable entry
+ # XXX
+ # sys.flags
+ check(sys.flags, size(vh) + self.P * len(sys.flags))
def test_main():
#endif /* USE_MALLOPT */
static PyObject *
-sys_getsizeof(PyObject *self, PyObject *args)
+sys_getsizeof(PyObject *self, PyObject *args, PyObject *kwds)
{
- static PyObject * str__sizeof__ = NULL;
+ PyObject *res = NULL;
+ static PyObject *str__sizeof__, *gc_head_size = NULL;
+ static char *kwlist[] = {"object", "default", 0};
+ PyObject *o, *dflt = NULL;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:getsizeof",
+ kwlist, &o, &dflt))
+ return NULL;
/* Initialize static variable needed by _PyType_Lookup */
if (str__sizeof__ == NULL) {
return NULL;
}
- /* Type objects */
- if (PyType_Check(args)){
- PyObject *method = _PyType_Lookup(Py_TYPE(args),
- str__sizeof__);
- if (method == NULL) {
- PyErr_Format(PyExc_TypeError,
- "Type %.100s doesn't define __sizeof__",
- Py_TYPE(args)->tp_name);
+ /* Initialize static variable for GC head size */
+ if (gc_head_size == NULL) {
+ gc_head_size = PyLong_FromSsize_t(sizeof(PyGC_Head));
+ if (gc_head_size == NULL)
return NULL;
- }
- return PyObject_CallFunctionObjArgs(method, args, NULL);
- }
+ }
+
+ /* Make sure the type is initialized. float gets initialized late */
+ if (PyType_Ready(Py_TYPE(o)) < 0)
+ return NULL;
+
+ PyObject *method = _PyType_Lookup(Py_TYPE(o), str__sizeof__);
+ if (method == NULL)
+ PyErr_Format(PyExc_TypeError,
+ "Type %.100s doesn't define __sizeof__",
+ Py_TYPE(o)->tp_name);
else
- return PyObject_CallMethod(args, "__sizeof__", NULL);
+ res = PyObject_CallFunctionObjArgs(method, o, NULL);
+
+ /* Has a default value been given */
+ if ((res == NULL) && (dflt != NULL) &&
+ PyErr_ExceptionMatches(PyExc_TypeError))
+ {
+ PyErr_Clear();
+ Py_INCREF(dflt);
+ return dflt;
+ }
+ else if (res == NULL)
+ return res;
+
+ /* add gc_head size */
+ if (PyObject_IS_GC(o)) {
+ PyObject *tmp = res;
+ res = PyNumber_Add(tmp, gc_head_size);
+ Py_DECREF(tmp);
+ }
+ return res;
}
PyDoc_STRVAR(getsizeof_doc,
-"getsizeof(object) -> int\n\
+"getsizeof(object, default) -> int\n\
\n\
Return the size of object in bytes.");
{"getrefcount", (PyCFunction)sys_getrefcount, METH_O, getrefcount_doc},
{"getrecursionlimit", (PyCFunction)sys_getrecursionlimit, METH_NOARGS,
getrecursionlimit_doc},
- {"getsizeof", sys_getsizeof, METH_O, getsizeof_doc},
+ {"getsizeof", (PyCFunction)sys_getsizeof,
+ METH_VARARGS | METH_KEYWORDS, getsizeof_doc},
{"_getframe", sys_getframe, METH_VARARGS, getframe_doc},
#ifdef MS_WINDOWS
{"getwindowsversion", (PyCFunction)sys_getwindowsversion, METH_NOARGS,
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