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gh-105020: Share tp_bases and tp_mro Between Interpreters For All Static Builtin Types #105115

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Merged
ericsnowcurrently merged 8 commits into from
May 31, 2023
Merged

gh-105020: Share tp_bases and tp_mro Between Interpreters For All Static Builtin Types #105115

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7c3e588
Make tp_bases immortal for static builtin types.
ericsnowcurrently May 30, 2023
ff411b2
Add _Py_ClearImmortal().
ericsnowcurrently May 30, 2023
354ff5f
Drop PyInterpreterState.types.builtins[i].tp_bases.
ericsnowcurrently May 30, 2023
5be53f4
Make sure tp_bases is a tuple.
ericsnowcurrently May 30, 2023
bf1578e
Make tp_mro immortal for static builtin types.
ericsnowcurrently May 30, 2023
f4a5da1
Update a TODO comment.
ericsnowcurrently May 30, 2023
e054bbe
Add a test to avoid more regressions.
ericsnowcurrently May 30, 2023
78c7d0e
Add a NEWS entry.
ericsnowcurrently May 30, 2023
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Make tp_bases immortal for static builtin types.
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@ericsnowcurrently
ericsnowcurrently committed May 30, 2023
commit 7c3e5881e8177dff321a790022dff4e1c7064e7d
33 changes: 18 additions & 15 deletions Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -268,12 +268,6 @@ clear_tp_dict(PyTypeObject *self)
static inline PyObject *
lookup_tp_bases(PyTypeObject *self)
{
if (self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
PyInterpreterState *interp = _PyInterpreterState_GET();
static_builtin_state *state = _PyStaticType_GetState(interp, self);
assert(state != NULL);
return state->tp_bases;
}
return self->tp_bases;
}

Expand All @@ -288,11 +282,18 @@ static inline void
set_tp_bases(PyTypeObject *self, PyObject *bases)
{
if (self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
PyInterpreterState *interp = _PyInterpreterState_GET();
static_builtin_state *state = _PyStaticType_GetState(interp, self);
assert(state != NULL);
state->tp_bases = bases;
return;
assert(_Py_IsMainInterpreter(_PyInterpreterState_GET()));
assert(self->tp_bases == NULL);
if (PyTuple_GET_SIZE(bases) == 0) {
assert(self->tp_base == NULL);
}
else {
assert(PyTuple_GET_SIZE(bases) == 1);
assert(PyTuple_GET_ITEM(bases, 0) == (PyObject *)self->tp_base);
assert(self->tp_base->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN);
assert(_Py_IsImmortal(self->tp_base));
}
_Py_SetImmortal(bases);
}
self->tp_bases = bases;
}
Expand All @@ -301,10 +302,12 @@ static inline void
clear_tp_bases(PyTypeObject *self)
{
if (self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
PyInterpreterState *interp = _PyInterpreterState_GET();
static_builtin_state *state = _PyStaticType_GetState(interp, self);
assert(state != NULL);
Py_CLEAR(state->tp_bases);
if (_Py_IsMainInterpreter(_PyInterpreterState_GET())) {
if (self->tp_bases != NULL) {
assert(_Py_IsImmortal(self->tp_bases));
// XXX Delete the tuple?
}
}
return;
}
Py_CLEAR(self->tp_bases);
Expand Down