config: Fix broken SimObject listing

The gem5 option '--list-sim-objects' is supposed to list all available
SimObjects and their parameters. It currently chokes on SimObjects
with parameters that have an object instance as their default
value. This is caused by __str__ in SimObject trying to resolve its
complete path. When the path resolution method reaches the parent
object (a MetaSimObject since it hasn't been instantiated), it dies
with a Python exception.

This changeset adds a guard to stop path resolution if the parent
object is a MetaSimObject.

diff --git a/src/python/m5/SimObject.py b/src/python/m5/SimObject.py
index 26463f6446dbd22716dbfd54e44d09a14f928af8..bb834fc0b99f6c22c709af493580f8c70bdffdd5 100644 (file)
--- a/src/python/m5/SimObject.py
+++ b/src/python/m5/SimObject.py
@@ -1227,6 +1227,9 @@ class SimObject(object):
     def path(self):
         if not self._parent:
             return '<orphan %s>' % self.__class__
+        elif isinstance(self._parent, MetaSimObject):
+            return str(self.__class__)
+
         ppath = self._parent.path()
         if ppath == 'root':
             return self._name