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gh-123923: Defer refcounting for f_executable in _PyInterpreterFrame (#123924)

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Use a `_PyStackRef` and defer the reference to `f_executable` when
possible. This avoids some reference count contention in the common case
of executing the same code object from multiple threads concurrently in
the free-threaded build.
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Sam Gross 2024-09-12 12:37:06 -04:00 • committed by GitHub
parent 4ed7d1d6ac
commit b2afe2aae4
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18 changed files with 177 additions and 99 deletions
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12
Include/internal/pycore_stackref.h
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@ -227,6 +227,13 @@ PyStackRef_DUP(_PyStackRef stackref)
# define PyStackRef_DUP(stackref) PyStackRef_FromPyObjectSteal(Py_NewRef(PyStackRef_AsPyObjectBorrow(stackref)))
#endif
// Convert a possibly deferred reference to a strong reference.
static inline _PyStackRef
PyStackRef_AsStrongReference(_PyStackRef stackref)
{
return PyStackRef_FromPyObjectSteal(PyStackRef_AsPyObjectSteal(stackref));
}
static inline void
_PyObjectStack_FromStackRefStack(PyObject **dst, const _PyStackRef *src, size_t length)
{
@ -261,6 +268,11 @@ PyStackRef_ExceptionInstanceCheck(_PyStackRef stackref)
return PyExceptionInstance_Check(PyStackRef_AsPyObjectBorrow(stackref));
}
static inline bool
PyStackRef_CodeCheck(_PyStackRef stackref)
{
return PyCode_Check(PyStackRef_AsPyObjectBorrow(stackref));
}
static inline bool
PyStackRef_FunctionCheck(_PyStackRef stackref)