bpo-42745: Make the type cache per-interpreter (GH-23947)
Make the type attribute lookup cache per-interpreter.
Add private _PyType_InitCache() function, called by PyInterpreterState_New().
Continue to share next_version_tag between interpreters, since static
types are still shared by interpreters.
Remove MCACHE macro: the cache is no longer disabled if the
EXPERIMENTAL_ISOLATED_SUBINTERPRETERS macro is defined.
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index 8d744c7..c3c1aa2 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -1750,7 +1750,7 @@ Py_FinalizeEx(void)
_PyImport_Fini();
/* Cleanup typeobject.c's internal caches. */
- _PyType_Fini();
+ _PyType_Fini(tstate);
/* unload faulthandler module */
_PyFaulthandler_Fini();
diff --git a/Python/pystate.c b/Python/pystate.c
index 231144b..c791b23 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -4,6 +4,7 @@
#include "Python.h"
#include "pycore_ceval.h"
#include "pycore_initconfig.h"
+#include "pycore_object.h" // _PyType_InitCache()
#include "pycore_pyerrors.h"
#include "pycore_pylifecycle.h"
#include "pycore_pymem.h" // _PyMem_SetDefaultAllocator()
@@ -223,6 +224,7 @@ PyInterpreterState_New(void)
_PyGC_InitState(&interp->gc);
PyConfig_InitPythonConfig(&interp->config);
+ _PyType_InitCache(interp);
interp->eval_frame = _PyEval_EvalFrameDefault;
#ifdef HAVE_DLOPEN