Check for type flags HPy_TPFLAGS_INTERNAL_PURE

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/hpy/GraalHPyDef.java

@@ -307,6 +307,7 @@ public LLVMType getLLVMFunctionType() {
 
     /* type flags according to 'hpytype.h' */
     public static final long _Py_TPFLAGS_HEAPTYPE = (1L << 9);
+    public static final long HPy_TPFLAGS_INTERNAL_PURE = (1L << 8);
     public static final long HPy_TPFLAGS_BASETYPE = (1L << 10);
     public static final long HPy_TPFLAGS_DEFAULT = _Py_TPFLAGS_HEAPTYPE;
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/hpy/GraalHPyNodes.java

@@ -41,6 +41,7 @@
 package com.oracle.graal.python.builtins.objects.cext.hpy;
 
 import static com.oracle.graal.python.builtins.PythonBuiltinClassType.SystemError;
+import static com.oracle.graal.python.builtins.PythonBuiltinClassType.TypeError;
 import static com.oracle.graal.python.builtins.objects.cext.hpy.GraalHPyDef.HPySlot.HPY_TP_DESTROY;
 import static com.oracle.graal.python.builtins.objects.cext.hpy.GraalHPyDef.HPySlot.HPY_TP_NEW;
 import static com.oracle.graal.python.builtins.objects.cext.hpy.GraalHPyNativeSymbol.GRAAL_HPY_DEF_GET_GETSET;
@@ -1925,6 +1926,10 @@ static Object doGeneric(GraalHPyContext context, Object typeSpec, Object typeSpe
 
                 // store flags, basicsize, and itemsize to type
                 long flags = castToLong(valueLib, ptrLib.readMember(typeSpec, "flags"));
+                if ((flags & GraalHPyDef.HPy_TPFLAGS_INTERNAL_PURE) != 0) {
+                    throw raiseNode.raise(TypeError, "HPy_TPFLAGS_INTERNAL_PURE should not be used directly, set .legacy=true instead");
+                }
+
                 long basicSize = castToLong(valueLib, ptrLib.readMember(typeSpec, "basicsize"));
                 long itemSize = castToLong(valueLib, ptrLib.readMember(typeSpec, "itemsize"));
                 writeAttributeToObjectNode.execute(newType, GraalHPyDef.TYPE_HPY_ITEMSIZE, itemSize);