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gh-94673: Add Per-Interpreter Storage for Static Builtin Types (#95255)

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This is the last precursor to storing tp_subclasses (and tp_weaklist) on the interpreter state for static builtin types.

Here we add per-type storage on PyInterpreterState, but only for the static builtin types.  This involves the following:

* add PyInterpreterState.types
   * move PyInterpreterState.type_cache to it
   * add a "num_builtins_initialized" field
   * add a "builtins" field (a static array big enough for all the static builtin types)
* add _PyStaticType_GetState() to look up a static builtin type's state
* (temporarily) add PyTypeObject.tp_static_builtin_index (to hold the type's index into PyInterpreterState.types.builtins)

We will be eliminating tp_static_builtin_index in a later change.
This commit is contained in:
Eric Snow 2022-07-26 17:26:43 -06:00 • committed by GitHub
parent 7ac5bb3e6a
commit 47e75a0025
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5 changed files with 125 additions and 7 deletions
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1
Include/cpython/object.h
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@ -227,6 +227,7 @@ struct _typeobject {
destructor tp_finalize;
vectorcallfunc tp_vectorcall;
size_t tp_static_builtin_index; /* 0 means "not initialized" */
};
/* This struct is used by the specializer

2
Include/internal/pycore_interp.h
View file

@ -173,7 +173,7 @@ struct _is {
struct _Py_exc_state exc_state;
struct ast_state ast;
struct type_cache type_cache;
struct types_state types;
struct callable_cache callable_cache;
/* The following fields are here to avoid allocation during init.

16
Include/internal/pycore_typeobject.h
View file

@ -39,9 +39,25 @@ struct type_cache {
#endif
};
/* For now we hard-code this to a value for which we are confident
all the static builtin types will fit (for all builds). */
#define _Py_MAX_STATIC_BUILTIN_TYPES 200
typedef struct {
PyTypeObject *type;
} static_builtin_state;
struct types_state {
struct type_cache type_cache;
size_t num_builtins_initialized;
static_builtin_state builtins[_Py_MAX_STATIC_BUILTIN_TYPES];
};
extern PyStatus _PyTypes_InitSlotDefs(void);
extern int _PyStaticType_InitBuiltin(PyTypeObject *type);
extern static_builtin_state * _PyStaticType_GetState(PyTypeObject *);
extern void _PyStaticType_Dealloc(PyTypeObject *type);