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bpo-1635741: Clean sysdict and builtins of interpreter #21605

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Merged
vstinner merged 5 commits into from
Aug 12, 2020
Merged

bpo-1635741: Clean sysdict and builtins of interpreter #21605

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137967a
Clean sysdict and builtins of interpreter.
shihai1991 Jul 24, 2020
2910570
update code according victor's comment
shihai1991 Aug 4, 2020
ba98fc1
Fix typo
shihai1991 Aug 5, 2020
d08c18f
update code order
shihai1991 Aug 5, 2020
a9df923
update code order
shihai1991 Aug 6, 2020
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update code order
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@shihai1991
shihai1991 committed Aug 6, 2020
commit a9df92379b8c4794a9ae7c0788402369dca7d769
12 changes: 8 additions & 4 deletions Python/pystate.c
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Expand Up @@ -294,10 +294,6 @@ PyInterpreterState_Clear(PyInterpreterState *interp)
Py_CLEAR(interp->codec_error_registry);
Py_CLEAR(interp->modules);
Py_CLEAR(interp->modules_by_index);
PyDict_Clear(interp->sysdict);
PyDict_Clear(interp->builtins);
Py_CLEAR(interp->sysdict);
Py_CLEAR(interp->builtins);
Py_CLEAR(interp->builtins_copy);
Py_CLEAR(interp->importlib);
Py_CLEAR(interp->import_func);
Expand All @@ -310,6 +306,14 @@ PyInterpreterState_Clear(PyInterpreterState *interp)
if (_PyRuntimeState_GetFinalizing(runtime) == NULL) {
_PyWarnings_Fini(interp);
}
/* We don't clear sysdict and builtins until the end of this function.
Because clearing other attributes can execute arbitrary Python code
which requires sysdict and builtins. */
PyDict_Clear(interp->sysdict);
PyDict_Clear(interp->builtins);
Py_CLEAR(interp->sysdict);
Py_CLEAR(interp->builtins);

// XXX Once we have one allocator per interpreter (i.e.
// per-interpreter GC) we must ensure that all of the interpreter's
// objects have been cleaned up at the point.
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