Hi everyone,
I think I might have found a bug in the PyPy C-API.
It seems that PyType_Type.tp_new is broken.
Here is a minimal example that reproduces the bug.
Instructions:
Compile Foo3.c as a python extension module named Foo3.
Set up the paths so that Test3.py can find Foo3.
Run Test3.py
Expected result and observed result with CPython 2.7.6:
Test3.py runs
Observed result with PyPy 2.2.1:
Test3.py crashes.
(It gets into an infinite recursive loop where PyType_Type.tpnew and
Foo3Type_Type.tp_new keep calling each other.)
Fixing this bug, or finding a workaround, would get me one step closer
to getting PySide to run with PyPy.
Cheers,
Johan
#include <Python.h>
PyObject* foo3type_tp_new(PyTypeObject* metatype, PyObject* args, PyObject*
kwds)
{
// In a more realistic example we might do some preprocessing of args
and kwargs here ...
PyObject* newType = PyType_Type.tp_new(metatype, args, kwds);
// ... and some postprocessing of newType here
return newType;
}
PyTypeObject Foo3Type_Type = {
PyVarObject_HEAD_INIT(0, 0)
/*tp_name*/ "Foo3.Type",
/*tp_basicsize*/ sizeof(PyTypeObject),
/*tp_itemsize*/ 0,
/*tp_dealloc*/ 0,
/*tp_print*/ 0,
/*tp_getattr*/ 0,
/*tp_setattr*/ 0,
/*tp_compare*/ 0,
/*tp_repr*/ 0,
/*tp_as_number*/ 0,
/*tp_as_sequence*/ 0,
/*tp_as_mapping*/ 0,
/*tp_hash*/ 0,
/*tp_call*/ 0,
/*tp_str*/ 0,
/*tp_getattro*/ 0,
/*tp_setattro*/ 0,
/*tp_as_buffer*/ 0,
/*tp_flags*/ Py_TPFLAGS_DEFAULT,
/*tp_doc*/ 0,
/*tp_traverse*/ 0,
/*tp_clear*/ 0,
/*tp_richcompare*/ 0,
/*tp_weaklistoffset*/ 0,
/*tp_iter*/ 0,
/*tp_iternext*/ 0,
/*tp_methods*/ 0,
/*tp_members*/ 0,
/*tp_getset*/ 0,
/*tp_base*/ 0, // set to &PyType_Type in module init
function (why can it not be done here?)
/*tp_dict*/ 0,
/*tp_descr_get*/ 0,
/*tp_descr_set*/ 0,
/*tp_dictoffset*/ 0,
/*tp_init*/ 0,
/*tp_alloc*/ 0,
/*tp_new*/ foo3type_tp_new,
/*tp_free*/ 0,
/*tp_is_gc*/ 0,
/*tp_bases*/ 0,
/*tp_mro*/ 0,
/*tp_cache*/ 0,
/*tp_subclasses*/ 0,
/*tp_weaklist*/ 0
};
static PyMethodDef sbkMethods[] = {{NULL, NULL, 0, NULL}};
#ifdef _WIN32
__declspec(dllexport) void // PyModINIT_FUNC is broken on
PyPy/Windows
#else
PyMODINIT_FUNC
#endif
initFoo3(void)
{
PyObject* mod = Py_InitModule("Foo3", sbkMethods);
Foo3Type_Type.tp_base = &PyType_Type;
PyType_Ready(&Foo3Type_Type);
PyModule_AddObject(mod, "Type", (PyObject*)&Foo3Type_Type);
}
import Foo3
class X(object):
__metaclass__ = Foo3.Type
pass
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