PyEval_GetFrame should return a borrowed reference

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextCEvalBuiltins.java

@@ -44,7 +44,7 @@
 import static com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiCallPath.Direct;
 import static com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiCallPath.Ignored;
 import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.Int;
-import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.PyFrameObjectTransfer;
+import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.PyFrameObjectBorrowed;
 import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.PyObject;
 import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.PyObjectBorrowed;
 import static com.oracle.graal.python.builtins.objects.cext.capi.transitions.ArgDescriptor.PyObjectConstPtr;
@@ -136,7 +136,7 @@ Object release(
         }
     }
 
-    @CApiBuiltin(ret = PyFrameObjectTransfer, args = {}, call = Direct)
+    @CApiBuiltin(ret = PyFrameObjectBorrowed, args = {}, call = Direct)
     abstract static class PyEval_GetFrame extends CApiNullaryBuiltinNode {
         @Specialization
         Object getFrame(

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/transitions/ArgDescriptor.java

@@ -220,6 +220,7 @@ public enum ArgDescriptor {
     PyFunctionObject(ArgBehavior.PyObject, "PyFunctionObject*"),
     PyFrameConstructor("PyFrameConstructor*"),
     PyFrameObject(ArgBehavior.PyObject, "PyFrameObject*"),
+    PyFrameObjectBorrowed(ArgBehavior.PyObjectBorrowed, "PyFrameObject*"),
     PyFrameObjectTransfer(ArgBehavior.PyObject, "PyFrameObject*", true),
     _PyFrameEvalFunction("_PyFrameEvalFunction"),
     _PyInterpreterFrame("struct _PyInterpreterFrame*"),