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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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Update a TODO comment.
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@ericsnowcurrently
ericsnowcurrently committed May 30, 2023
commit f4a5da1c3725c449a6223922a92e8d17bc8a8425
4 changes: 2 additions & 2 deletions Include/internal/pycore_typeobject.h
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Expand Up @@ -46,8 +46,8 @@ typedef struct {
PyTypeObject *type;
int readying;
int ready;
// XXX tp_dict, tp_bases, and tp_mro can probably be statically
// allocated, instead of dynamically and stored on the interpreter.
// XXX tp_dict can probably be statically allocated,
// instead of dynamically and stored on the interpreter.
PyObject *tp_dict;
PyObject *tp_subclasses;
/* We never clean up weakrefs for static builtin types since
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4 changes: 4 additions & 0 deletions Objects/typeobject.c
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Expand Up @@ -283,6 +283,8 @@ set_tp_bases(PyTypeObject *self, PyObject *bases)
{
assert(PyTuple_CheckExact(bases));
if (self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
// XXX tp_bases can probably be statically allocated for each
// static builtin type.
assert(_Py_IsMainInterpreter(_PyInterpreterState_GET()));
assert(self->tp_bases == NULL);
if (PyTuple_GET_SIZE(bases) == 0) {
Expand Down Expand Up @@ -335,6 +337,8 @@ set_tp_mro(PyTypeObject *self, PyObject *mro)
{
assert(PyTuple_CheckExact(mro));
if (self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
// XXX tp_mro can probably be statically allocated for each
// static builtin type.
assert(_Py_IsMainInterpreter(_PyInterpreterState_GET()));
assert(self->tp_mro == NULL);
/* Other checks are done via set_tp_bases. */
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