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gh-115999: Specialize LOAD_SUPER_ATTR in free-threaded builds (gh-127128)

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Use existing helpers to atomically modify the bytecode.  Add unit tests
to ensure specializing is happening as expected.  Add test_specialize.py
that can be used with ThreadSanitizer to detect data races.  
Fix thread safety issue with cell_set_contents().
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Neil Schemenauer 2024-12-03 09:32:26 -08:00 • committed by GitHub
parent 8ba9f5bca9
commit 0cb5222079
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6 changed files with 51 additions and 21 deletions
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Objects/cellobject.c
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@ -145,8 +145,9 @@ cell_get_contents(PyObject *self, void *closure)
static int
cell_set_contents(PyObject *self, PyObject *obj, void *Py_UNUSED(ignored))
{
PyCellObject *op = _PyCell_CAST(self);
Py_XSETREF(op->ob_ref, Py_XNewRef(obj));
PyCellObject *cell = _PyCell_CAST(self);
Py_XINCREF(obj);
PyCell_SetTakeRef((PyCellObject *)cell, obj);
return 0;
}