cpython/Modules/_testcapi/type.c at 3.15 · python/cpython · GitHub

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// Thin wrappers to PyType functions.

// Do no check PyType_Check() so Python tests can pass arbitrary objects,

// even if it's likely to crash.

#include "parts.h"

#include "util.h"

static PyType_Slot HeapTypeNameType_slots[] = {

{0},

};

static PyType_Spec HeapTypeNameType_Spec = {

.name = "_testcapi.HeapTypeNameType",

.basicsize = sizeof(PyObject),

.flags = Py_TPFLAGS_DEFAULT,

.slots = HeapTypeNameType_slots,

};

// Test for PyType_GetDict()

static PyObject *

test_get_type_dict(PyObject *self, PyObject *Py_UNUSED(ignored))

{

// Assert ints have a `to_bytes` method

PyObject *long_dict = PyType_GetDict(&PyLong_Type);

assert(long_dict);

assert(PyDict_GetItemString(long_dict, "to_bytes")); // borrowed ref

Py_DECREF(long_dict);

// Make a new type, add an attribute to it and assert it's there

PyObject *HeapTypeNameType = PyType_FromSpec(&HeapTypeNameType_Spec);

assert(HeapTypeNameType);

assert(PyObject_SetAttrString(

HeapTypeNameType, "new_attr", Py_NewRef(Py_None)) >= 0);

PyObject *type_dict = PyType_GetDict((PyTypeObject*)HeapTypeNameType);

assert(type_dict);

assert(PyDict_GetItemString(type_dict, "new_attr")); // borrowed ref

Py_DECREF(HeapTypeNameType);

Py_DECREF(type_dict);

Py_RETURN_NONE;

}

// Test PyType_GetSlot()

static PyObject *

test_get_statictype_slots(PyObject *self, PyObject *Py_UNUSED(ignored))

{

newfunc tp_new = PyType_GetSlot(&PyLong_Type, Py_tp_new);

if (PyLong_Type.tp_new != tp_new) {

PyErr_SetString(PyExc_AssertionError, "mismatch: tp_new of long");

return NULL;

}

reprfunc tp_repr = PyType_GetSlot(&PyLong_Type, Py_tp_repr);

if (PyLong_Type.tp_repr != tp_repr) {

PyErr_SetString(PyExc_AssertionError, "mismatch: tp_repr of long");

return NULL;

}

ternaryfunc tp_call = PyType_GetSlot(&PyLong_Type, Py_tp_call);

if (tp_call != NULL) {

PyErr_SetString(PyExc_AssertionError, "mismatch: tp_call of long");

return NULL;

}

binaryfunc nb_add = PyType_GetSlot(&PyLong_Type, Py_nb_add);

if (PyLong_Type.tp_as_number->nb_add != nb_add) {

PyErr_SetString(PyExc_AssertionError, "mismatch: nb_add of long");

return NULL;

}

lenfunc mp_length = PyType_GetSlot(&PyLong_Type, Py_mp_length);

if (mp_length != NULL) {

PyErr_SetString(PyExc_AssertionError, "mismatch: mp_length of long");

return NULL;

}

void *over_value = PyType_GetSlot(&PyLong_Type, Py_mod_name + 1);

if (over_value != NULL) {

PyErr_SetString(PyExc_AssertionError, "mismatch: mod_name of long");

return NULL;

}

tp_new = PyType_GetSlot(&PyLong_Type, 0);

if (tp_new != NULL) {

PyErr_SetString(PyExc_AssertionError, "mismatch: slot 0 of long");

return NULL;

}

if (PyErr_ExceptionMatches(PyExc_SystemError)) {

// This is the right exception

PyErr_Clear();

}

else {

return NULL;

}

Py_RETURN_NONE;

}

// Get type->tp_version_tag

static PyObject *

type_get_version(PyObject *self, PyObject *arg)

{

NULLABLE(arg);

PyTypeObject *type = (PyTypeObject*)arg;

PyObject *res = PyLong_FromUnsignedLong(type->tp_version_tag);

if (res == NULL) {

assert(PyErr_Occurred());

return NULL;

}

return res;

}

// Test PyUnstable_Type_AssignVersionTag()

static PyObject *

type_assign_version(PyObject *self, PyObject *arg)

{

NULLABLE(arg);

PyTypeObject *type = (PyTypeObject*)arg;

int res = PyUnstable_Type_AssignVersionTag(type);

return PyLong_FromLong(res);

}

// Get PyTypeObject.tp_bases

static PyObject *

type_get_tp_bases(PyObject *self, PyObject *arg)

{

NULLABLE(arg);

PyTypeObject *type = (PyTypeObject*)arg;

PyObject *bases = type->tp_bases;

if (bases == NULL) {

Py_RETURN_NONE;

}

return Py_NewRef(bases);

}

// Get PyTypeObject.tp_mro

static PyObject *

type_get_tp_mro(PyObject *self, PyObject *arg)

{

NULLABLE(arg);

PyTypeObject *type = (PyTypeObject*)arg;

PyObject *mro = type->tp_mro;

if (mro == NULL) {

Py_RETURN_NONE;

}

return Py_NewRef(mro);

}

static PyMethodDef test_methods[] = {

{"test_get_type_dict", test_get_type_dict, METH_NOARGS},

{"test_get_statictype_slots", test_get_statictype_slots, METH_NOARGS},

{"type_get_version", type_get_version, METH_O, PyDoc_STR("type->tp_version_tag")},

{"type_assign_version", type_assign_version, METH_O, PyDoc_STR("PyUnstable_Type_AssignVersionTag")},

{"type_get_tp_bases", type_get_tp_bases, METH_O},

{"type_get_tp_mro", type_get_tp_mro, METH_O},

{NULL},

};

int

_PyTestCapi_Init_Type(PyObject *m)

{

if (PyModule_AddFunctions(m, test_methods) < 0) {

return -1;

}

#define ADD_INT(macro) \

do { \

if (PyModule_AddIntConstant(m, #macro, macro) < 0) { \

return -1; \

} \

} while (0)

// Flags excluded from the limited C API

ADD_INT(_Py_TPFLAGS_STATIC_BUILTIN);

ADD_INT(Py_TPFLAGS_INLINE_VALUES);

ADD_INT(Py_TPFLAGS_MANAGED_WEAKREF);

ADD_INT(Py_TPFLAGS_MANAGED_DICT);

ADD_INT(Py_TPFLAGS_SEQUENCE);

ADD_INT(Py_TPFLAGS_MAPPING);

#undef ADD_INT

return 0;

}

cpython/Modules/_testcapi/type.c at 3.15 · python/cpython · GitHub

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