Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
home:wrzof:gate
python34
00248-ensure-gc-tracking-is-off-when-invoking-w...
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File 00248-ensure-gc-tracking-is-off-when-invoking-weakref-callbacks.patch of Package python34
# HG changeset patch # User Benjamin Peterson <benjamin@python.org> # Date 1475564402 25200 # Node ID c9b7272e25532f84d7feb1b0d942978329156ace # Parent b24d0f274623d100e9bad7a4cb1b3f1a3e0b82b1 ensure gc tracking is off when invoking weakref callbacks (closes #26617) diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py --- a/Lib/test/test_weakref.py +++ b/Lib/test/test_weakref.py @@ -845,6 +845,14 @@ class ReferencesTestCase(TestBase): with self.assertRaises(AttributeError): ref1.__callback__ = lambda ref: None + def test_callback_gcs(self): + class ObjectWithDel(Object): + def __del__(self): pass + x = ObjectWithDel(1) + ref1 = weakref.ref(x, lambda ref: support.gc_collect()) + del x + support.gc_collect() + class SubclassableWeakrefTestCase(TestBase): diff --git a/Objects/typeobject.c b/Objects/typeobject.c --- a/Objects/typeobject.c +++ b/Objects/typeobject.c @@ -1123,11 +1123,6 @@ subtype_dealloc(PyObject *self) Py_TRASHCAN_SAFE_BEGIN(self); --_PyTrash_delete_nesting; -- tstate->trash_delete_nesting; - /* DO NOT restore GC tracking at this point. weakref callbacks - * (if any, and whether directly here or indirectly in something we - * call) may trigger GC, and if self is tracked at that point, it - * will look like trash to GC and GC will try to delete self again. - */ /* Find the nearest base with a different tp_dealloc */ base = type; @@ -1138,30 +1133,36 @@ subtype_dealloc(PyObject *self) has_finalizer = type->tp_finalize || type->tp_del; - /* Maybe call finalizer; exit early if resurrected */ - if (has_finalizer) + if (type->tp_finalize) { _PyObject_GC_TRACK(self); - - if (type->tp_finalize) { if (PyObject_CallFinalizerFromDealloc(self) < 0) { /* Resurrected */ goto endlabel; } - } - /* If we added a weaklist, we clear it. Do this *before* calling - tp_del, clearing slots, or clearing the instance dict. */ + _PyObject_GC_UNTRACK(self); + } + /* + If we added a weaklist, we clear it. Do this *before* calling tp_del, + clearing slots, or clearing the instance dict. + + GC tracking must be off at this point. weakref callbacks (if any, and + whether directly here or indirectly in something we call) may trigger GC, + and if self is tracked at that point, it will look like trash to GC and GC + will try to delete self again. + */ if (type->tp_weaklistoffset && !base->tp_weaklistoffset) PyObject_ClearWeakRefs(self); if (type->tp_del) { + _PyObject_GC_TRACK(self); type->tp_del(self); if (self->ob_refcnt > 0) { /* Resurrected */ goto endlabel; } + _PyObject_GC_UNTRACK(self); } if (has_finalizer) { - _PyObject_GC_UNTRACK(self); /* New weakrefs could be created during the finalizer call. If this occurs, clear them out without calling their finalizers since they might rely on part of the object
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor