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bpo-31095: fix potential crash during GC (GH-2974)

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INADA Naoki 2017-08-24 14:55:17 +09:00 • committed by GitHub
parent bf9075a0c5
commit a6296d34a4
14 changed files with 60 additions and 13 deletions
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6
Objects/dictobject.c
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@ -1847,6 +1847,8 @@ dict_dealloc(PyDictObject *mp)
PyObject **values = mp->ma_values;
PyDictKeysObject *keys = mp->ma_keys;
Py_ssize_t i, n;
/* bpo-31095: UnTrack is needed before calling any callbacks */
PyObject_GC_UnTrack(mp);
Py_TRASHCAN_SAFE_BEGIN(mp)
if (values != NULL) {
@ -3270,6 +3272,8 @@ dictiter_new(PyDictObject *dict, PyTypeObject *itertype)
static void
dictiter_dealloc(dictiterobject *di)
{
/* bpo-31095: UnTrack is needed before calling any callbacks */
_PyObject_GC_UNTRACK(di);
Py_XDECREF(di->di_dict);
Py_XDECREF(di->di_result);
PyObject_GC_Del(di);
@ -3629,6 +3633,8 @@ dictiter_reduce(dictiterobject *di)
static void
dictview_dealloc(_PyDictViewObject *dv)
{
/* bpo-31095: UnTrack is needed before calling any callbacks */
_PyObject_GC_UNTRACK(dv);
Py_XDECREF(dv->dv_dict);
PyObject_GC_Del(dv);
}