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Define slots before initialization
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filmor committed Oct 28, 2022
commit 8668579834623a1ef196840b8f2a93407f52701b
1 change: 1 addition & 0 deletions src/runtime/PythonTypes/PyType.cs
Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,7 @@ private static StolenReference FromSpec(TypeSpec spec, PyTuple? bases = null)
using var nativeSpec = new NativeTypeSpec(spec);
var basesRef = bases is null ? default : bases.Reference;
var result = Runtime.PyType_FromSpecWithBases(in nativeSpec, basesRef);
// Runtime.PyErr_Print();
return result.StealOrThrow();
}
}
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23 changes: 13 additions & 10 deletions src/runtime/TypeManager.cs
Original file line number Diff line number Diff line change
Expand Up @@ -475,17 +475,20 @@ internal static PyType CreateMetatypeWithGCHandleOffset()
int size = Util.ReadInt32(Runtime.PyTypeType, TypeOffset.tp_basicsize)
+ IntPtr.Size // tp_clr_inst_offset
;
var result = new PyType(new TypeSpec("clr._internal.GCOffsetBase", basicSize: size,
new TypeSpec.Slot[]
{

},
TypeFlags.Default | TypeFlags.HeapType | TypeFlags.HaveGC),
bases: new PyTuple(new[] { py_type }));

SetRequiredSlots(result, seen: new HashSet<string>());

Runtime.PyType_Modified(result);
var slots = new[] {
new TypeSpec.Slot(TypeSlotID.tp_traverse, subtype_traverse),
new TypeSpec.Slot(TypeSlotID.tp_clear, subtype_clear)
};
Comment on lines +479 to +482
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@lostmsu lostmsu Oct 18, 2022

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This creates multiple sources of truth. Does editing post creation not work?

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It doesn't. Python 3.11 rejects creating a type that has HAVE_GC set but not these slots. Rightly so :)

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Can we have this array shared with the other place that used to use this function?

var result = new PyType(
new TypeSpec(
"clr._internal.GCOffsetBase",
basicSize: size,
slots: slots,
TypeFlags.Default | TypeFlags.HeapType | TypeFlags.HaveGC
),
bases: new PyTuple(new[] { py_type })
);

return result;
}
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