Update chains structures

- Fixes chains structure parsing
- Fix Semaphore node parsing

tools/gdb/python/chains.py

@@ -14,15 +14,17 @@ class node:
         self.node_val = node_val
 
     def null(self):
-        return self.node_val['next'] == 0
+        if not self.node_val:
+            return True
+        return False
 
     def next(self):
         if not self.null():
-            self.node_val = self.node_val['next'].dereference()
+            self.node_val = self.node_val['next']
 
     def previous(self):
         if not self.null():
-            self.node_val = self.node_val['previous'].dereference()
+            self.node_val = self.node_val['previous']
 
     def cast(self, typename):
         if not self.null():
@@ -30,6 +32,7 @@ class node:
             return self.node_val.cast(nodetype)
         return None
 
+
 class control:
     """Manage the Chain_Control."""
 
@@ -37,7 +40,8 @@ class control:
         self.ctrl = ctrl
 
     def first(self):
-        return node(self.ctrl['first'].dereference())
+        t = node(self.ctrl['Head']['Node'])
+        return t
 
     def last(self):
         return node(self.ctrl['first'])

tools/gdb/python/objects.py

@@ -62,6 +62,9 @@ class infotables:
             api = id.api()
             _class = id._class()
             index = id.index()
+        return self.object_return(api, _class, index)
+
+    def object_return(self, api, _class, index):
         n = self.name(api, _class)
         self.load(n)
         max = self.maximum(api, _class)

tools/gdb/python/threads.py

@@ -14,7 +14,6 @@ def task_chain(chain):
     tasks = []
     node = chain.first()
     while not node.null():
-        print node.addr
         tasks.append(control(node.cast('Thread_Control')))
         node.next()
     return tasks
@@ -188,7 +187,8 @@ class queue:
         else:
             t = []
             for ph in range(0, self.priority_headers):
-                t.extend(task_chain(chains.control(self.que['Queues']['Fifo'])))
+                t.extend(task_chain(chains.control( \
+                    self.que['Queues']['Priority'][ph])))
         return t
 
     def to_string(self):