extend findSourceLocation somewhat

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/PythonLanguage.java

@@ -48,7 +48,7 @@
 import com.oracle.graal.python.builtins.objects.method.PMethod;
 import com.oracle.graal.python.builtins.objects.module.PythonModule;
 import com.oracle.graal.python.builtins.objects.object.PythonObject;
-import com.oracle.graal.python.builtins.objects.type.PythonBuiltinClass;
+import com.oracle.graal.python.builtins.objects.type.PythonClass;
 import com.oracle.graal.python.nodes.BuiltinNames;
 import com.oracle.graal.python.nodes.NodeFactory;
 import com.oracle.graal.python.nodes.PNode;
@@ -386,10 +386,20 @@ protected Iterable<Scope> findTopScopes(PythonContext context) {
     }
 
     @Override
+    @TruffleBoundary
     protected SourceSection findSourceLocation(PythonContext context, Object value) {
         if (value instanceof PFunction || value instanceof PMethod) {
             PythonCallable callable = (PythonCallable) value;
             return callable.getCallTarget().getRootNode().getSourceSection();
+        } else if (value instanceof PCode) {
+            return ((PCode) value).getRootNode().getSourceSection();
+        } else if (value instanceof PythonClass) {
+            for (String k : ((PythonClass) value).getAttributeNames()) {
+                SourceSection attrSourceLocation = findSourceLocation(context, ((PythonClass) value).getAttribute(k));
+                if (attrSourceLocation != null) {
+                    return attrSourceLocation;
+                }
+            }
         }
         return null;
     }