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gh-112075: Make instance attributes stored in inline "dict" thread safe (#114742)

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Make instance attributes stored in inline "dict" thread safe on free-threaded builds
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Dino Viehland 2024-04-21 22:57:05 -07:00 • committed by GitHub
parent 1446024124
commit 8b541c017e
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13 changed files with 419 additions and 142 deletions
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16
Include/internal/pycore_object.h
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@ -12,6 +12,7 @@ extern "C" {
#include "pycore_gc.h" // _PyObject_GC_IS_TRACKED()
#include "pycore_emscripten_trampoline.h" // _PyCFunction_TrampolineCall()
#include "pycore_interp.h" // PyInterpreterState.gc
#include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_STORE_PTR_RELAXED
#include "pycore_pystate.h" // _PyInterpreterState_GET()
/* Check if an object is consistent. For example, ensure that the reference
@ -659,10 +660,10 @@ extern PyObject* _PyType_GetDocFromInternalDoc(const char *, const char *);
extern PyObject* _PyType_GetTextSignatureFromInternalDoc(const char *, const char *, int);
void _PyObject_InitInlineValues(PyObject *obj, PyTypeObject *tp);
extern int _PyObject_StoreInstanceAttribute(PyObject *obj, PyDictValues *values,
PyObject *name, PyObject *value);
PyObject * _PyObject_GetInstanceAttribute(PyObject *obj, PyDictValues *values,
PyObject *name);
extern int _PyObject_StoreInstanceAttribute(PyObject *obj,
PyObject *name, PyObject *value);
extern bool _PyObject_TryGetInstanceAttribute(PyObject *obj, PyObject *name,
PyObject **attr);
#ifdef Py_GIL_DISABLED
# define MANAGED_DICT_OFFSET (((Py_ssize_t)sizeof(PyObject *))*-1)
@ -683,6 +684,13 @@ _PyObject_ManagedDictPointer(PyObject *obj)
return (PyManagedDictPointer *)((char *)obj + MANAGED_DICT_OFFSET);
}
static inline PyDictObject *
_PyObject_GetManagedDict(PyObject *obj)
{
PyManagedDictPointer *dorv = _PyObject_ManagedDictPointer(obj);
return (PyDictObject *)FT_ATOMIC_LOAD_PTR_RELAXED(dorv->dict);
}
static inline PyDictValues *
_PyObject_InlineValues(PyObject *obj)
{