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gh-111178: fix UBSan failures in Python/hamt.c #128247

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Merged
encukou merged 5 commits into from
Jan 8, 2025
Merged

gh-111178: fix UBSan failures in Python/hamt.c #128247

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bbdace9
fix UBSan failures for `PyHamtObject`
picnixz Dec 23, 2024
5a7de76
fix UBSan failures for `PyHamtNode_Array`
picnixz Dec 23, 2024
b927bab
fix UBSan failures for `PyHamtNode_Collision`
picnixz Dec 23, 2024
a993bff
fix UBSan failures for `PyHamtNode_Bitmap`
picnixz Dec 23, 2024
6b23ccb
fix indentation
picnixz Dec 26, 2024
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fix UBSan failures for PyHamtObject
  • Loading branch information
@picnixz
picnixz committed Dec 24, 2024
commit bbdace9c47878495a303036ccad49a7f3c8d25ed
87 changes: 47 additions & 40 deletions Python/hamt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2605,6 +2605,8 @@ static PyObject *
hamt_dump(PyHamtObject *self);
#endif

#define _PyHamtObject_CAST(op) ((PyHamtObject *)(op))


static PyObject *
hamt_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
Expand All @@ -2613,24 +2615,27 @@ hamt_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
}

static int
hamt_tp_clear(PyHamtObject *self)
hamt_tp_clear(PyObject *op)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
Py_CLEAR(self->h_root);
return 0;
}


static int
hamt_tp_traverse(PyHamtObject *self, visitproc visit, void *arg)
hamt_tp_traverse(PyObject *op, visitproc visit, void *arg)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
Py_VISIT(self->h_root);
return 0;
}

static void
hamt_tp_dealloc(PyHamtObject *self)
hamt_tp_dealloc(PyObject *self)
{
if (self == _empty_hamt) {
PyHamtObject *obj = _PyHamtObject_CAST(self);
if (obj == _empty_hamt) {
/* The empty one is statically allocated. */
#ifdef Py_DEBUG
_Py_FatalRefcountError("deallocating the empty hamt singleton");
Expand All @@ -2640,8 +2645,8 @@ hamt_tp_dealloc(PyHamtObject *self)
}

PyObject_GC_UnTrack(self);
if (self->h_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)self);
if (obj->h_weakreflist != NULL) {
PyObject_ClearWeakRefs(self);
}
(void)hamt_tp_clear(self);
Py_TYPE(self)->tp_free(self);
Expand Down Expand Up @@ -2673,16 +2678,18 @@ hamt_tp_richcompare(PyObject *v, PyObject *w, int op)
}

static int
hamt_tp_contains(PyHamtObject *self, PyObject *key)
hamt_tp_contains(PyObject *op, PyObject *key)
{
PyObject *val;
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_Find(self, key, &val);
}

static PyObject *
hamt_tp_subscript(PyHamtObject *self, PyObject *key)
hamt_tp_subscript(PyObject *op, PyObject *key)
{
PyObject *val;
PyHamtObject *self = _PyHamtObject_CAST(op);
hamt_find_t res = hamt_find(self, key, &val);
switch (res) {
case F_ERROR:
Expand All @@ -2698,19 +2705,21 @@ hamt_tp_subscript(PyHamtObject *self, PyObject *key)
}

static Py_ssize_t
hamt_tp_len(PyHamtObject *self)
hamt_tp_len(PyObject *op)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_Len(self);
}

static PyObject *
hamt_tp_iter(PyHamtObject *self)
hamt_tp_iter(PyObject *op)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_NewIterKeys(self);
}

static PyObject *
hamt_py_set(PyHamtObject *self, PyObject *args)
hamt_py_set(PyObject *op, PyObject *args)
{
PyObject *key;
PyObject *val;
Expand All @@ -2719,11 +2728,12 @@ hamt_py_set(PyHamtObject *self, PyObject *args)
return NULL;
}

PyHamtObject *self = _PyHamtObject_CAST(op);
return (PyObject *)_PyHamt_Assoc(self, key, val);
}

static PyObject *
hamt_py_get(PyHamtObject *self, PyObject *args)
hamt_py_get(PyObject *op, PyObject *args)
{
PyObject *key;
PyObject *def = NULL;
Expand All @@ -2733,6 +2743,7 @@ hamt_py_get(PyHamtObject *self, PyObject *args)
}

PyObject *val = NULL;
PyHamtObject *self = _PyHamtObject_CAST(op);
hamt_find_t res = hamt_find(self, key, &val);
switch (res) {
case F_ERROR:
Expand All @@ -2750,67 +2761,63 @@ hamt_py_get(PyHamtObject *self, PyObject *args)
}

static PyObject *
hamt_py_delete(PyHamtObject *self, PyObject *key)
hamt_py_delete(PyObject *op, PyObject *key)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return (PyObject *)_PyHamt_Without(self, key);
}

static PyObject *
hamt_py_items(PyHamtObject *self, PyObject *args)
hamt_py_items(PyObject *op, PyObject *args)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_NewIterItems(self);
}

static PyObject *
hamt_py_values(PyHamtObject *self, PyObject *args)
hamt_py_values(PyObject *op, PyObject *args)
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_NewIterValues(self);
}

static PyObject *
hamt_py_keys(PyHamtObject *self, PyObject *Py_UNUSED(args))
hamt_py_keys(PyObject *op, PyObject *Py_UNUSED(args))
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return _PyHamt_NewIterKeys(self);
}

#ifdef Py_DEBUG
static PyObject *
hamt_py_dump(PyHamtObject *self, PyObject *Py_UNUSED(args))
hamt_py_dump(PyObject *op, PyObject *Py_UNUSED(args))
{
PyHamtObject *self = _PyHamtObject_CAST(op);
return hamt_dump(self);
}
#endif


static PyMethodDef PyHamt_methods[] = {
{"set", _PyCFunction_CAST(hamt_py_set), METH_VARARGS, NULL},
{"get", _PyCFunction_CAST(hamt_py_get), METH_VARARGS, NULL},
{"delete", _PyCFunction_CAST(hamt_py_delete), METH_O, NULL},
{"items", _PyCFunction_CAST(hamt_py_items), METH_NOARGS, NULL},
{"keys", _PyCFunction_CAST(hamt_py_keys), METH_NOARGS, NULL},
{"values", _PyCFunction_CAST(hamt_py_values), METH_NOARGS, NULL},
{"set", hamt_py_set, METH_VARARGS, NULL},
{"get", hamt_py_get, METH_VARARGS, NULL},
{"delete", hamt_py_delete, METH_O, NULL},
{"items", hamt_py_items, METH_NOARGS, NULL},
{"keys", hamt_py_keys, METH_NOARGS, NULL},
{"values", hamt_py_values, METH_NOARGS, NULL},
#ifdef Py_DEBUG
{"__dump__", _PyCFunction_CAST(hamt_py_dump), METH_NOARGS, NULL},
{"__dump__", hamt_py_dump, METH_NOARGS, NULL},
#endif
{NULL, NULL}
};

static PySequenceMethods PyHamt_as_sequence = {
0, /* sq_length */
0, /* sq_concat */
0, /* sq_repeat */
0, /* sq_item */
0, /* sq_slice */
0, /* sq_ass_item */
0, /* sq_ass_slice */
(objobjproc)hamt_tp_contains, /* sq_contains */
0, /* sq_inplace_concat */
0, /* sq_inplace_repeat */
.sq_contains = hamt_tp_contains,
};

static PyMappingMethods PyHamt_as_mapping = {
(lenfunc)hamt_tp_len, /* mp_length */
(binaryfunc)hamt_tp_subscript, /* mp_subscript */
.mp_length = hamt_tp_len,
.mp_subscript = hamt_tp_subscript,
};

PyTypeObject _PyHamt_Type = {
Expand All @@ -2820,13 +2827,13 @@ PyTypeObject _PyHamt_Type = {
.tp_methods = PyHamt_methods,
.tp_as_mapping = &PyHamt_as_mapping,
.tp_as_sequence = &PyHamt_as_sequence,
.tp_iter = (getiterfunc)hamt_tp_iter,
.tp_dealloc = (destructor)hamt_tp_dealloc,
.tp_iter = hamt_tp_iter,
.tp_dealloc = hamt_tp_dealloc,
.tp_getattro = PyObject_GenericGetAttr,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
.tp_richcompare = hamt_tp_richcompare,
.tp_traverse = (traverseproc)hamt_tp_traverse,
.tp_clear = (inquiry)hamt_tp_clear,
.tp_traverse = hamt_tp_traverse,
.tp_clear = hamt_tp_clear,
.tp_new = hamt_tp_new,
.tp_weaklistoffset = offsetof(PyHamtObject, h_weakreflist),
.tp_hash = PyObject_HashNotImplemented,
Expand Down