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gh-94673: More Per-Interpreter Fields for Builtin Static Types (gh-103912)

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his involves moving tp_dict, tp_bases, and tp_mro to PyInterpreterState, in the same way we did for tp_subclasses.  Those three fields are effectively const for builtin static types (unlike tp_subclasses).  In theory we only need to make their values immortal, along with their contents.  However, that isn't such a simple proposition.  (See gh-103823.)  In the meantime the simplest solution is to move the fields into the interpreter.

One alternative is to statically allocate the values, but that's its own can of worms.
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Eric Snow 2023-05-02 21:30:03 -06:00 • committed by GitHub
parent 872cbc6132
commit de64e75616
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5 changed files with 185 additions and 86 deletions
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7
Include/internal/pycore_typeobject.h
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@ -44,6 +44,13 @@ struct type_cache {
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.
PyObject *tp_dict;
PyObject *tp_bases;
PyObject *tp_mro;
PyObject *tp_subclasses;
/* We never clean up weakrefs for static builtin types since
they will effectively never get triggered. However, there