Dtable cleanup cleanups.

associate.m

@@ -234,8 +234,7 @@ static void deallocHiddenClass(id obj, SEL _cmd)
 	struct reference_list *list = object_getIndexedIvars(hiddenClass);
 	cleanupReferenceList(list);
 
-	// FIXME: Low memory profile.
+	free_dtable(hiddenClass->dtable);
-	SparseArrayDestroy(hiddenClass->dtable);
 
 	// Free the class
 	free(hiddenClass);

dtable.c

@@ -268,6 +268,16 @@ PRIVATE dtable_t objc_copy_dtable_for_class(dtable_t old, Class cls)
 	return dtable;
 }
 
+PRIVATE void free_dtable(dtable_t dtable)
+{
+	if (NULL != dtable->slots)
+	{
+		free(dtable->slots);
+	}
+	DESTROY_LOCK(dtable->lock);
+	free(dtable);
+}
+
 #else
 
 
@@ -495,6 +505,11 @@ PRIVATE dtable_t objc_copy_dtable_for_class(dtable_t old, Class cls)
 	return SparseArrayCopy(old);
 }
 
+PRIVATE void free_dtable(dtable_t dtable)
+{
+	SparseArrayDestroy(dtable);
+}
+
 #endif // __OBJC_LOW_MEMORY__
 
 LEGACY void update_dispatch_table_for_class(Class cls)

dtable.h

@@ -123,6 +123,6 @@ void add_method_list_to_class(Class cls,
                               struct objc_method_list *list);
 
 /**
- * Creates a copy of the class's dispatch table.
+ * Destroys a dtable.
  */
-dtable_t objc_copy_dtable_for_class(dtable_t old, Class cls);
+void free_dtable(dtable_t dtable);

runtime.c

@@ -138,7 +138,7 @@ BOOL class_addMethod(Class cls, SEL name, IMP imp, const char *types)
 
 	if (objc_test_class_flag(cls, objc_class_flag_resolved))
 	{
-		objc_update_dtable_for_class(cls);
+		add_method_list_to_class(cls, methods);
 	}
 
 	return YES;
@@ -569,6 +569,8 @@ void objc_disposeClassPair(Class cls)
 	freeMethodLists(cls);
 	freeMethodLists(meta);
 	freeIvarLists(cls);
+	free_dtable(cls->dtable);
+	free_dtable(meta->dtable);
 
 	// Free the class and metaclass
 	free(meta);