Fix an issue where the @lldb.command marker would not work with the new 5-argument version of the Python command function

This:
a) teaches PythonCallable to look inside a callable object
b) teaches PythonCallable to discover whether a callable method is bound
c) teaches lldb.command to dispatch to either the older 4 argument version or the newer 5 argument version

llvm-svn: 273640

lldb/scripts/Python/python-extensions.swig

@@ -810,6 +810,7 @@
 
 def command(*args, **kwargs):
     import lldb
+    import inspect
     """A decorator function that registers an LLDB command line
         command that is bound to the function it is attached to."""
     class obj(object):
@@ -821,11 +822,15 @@ def command(*args, **kwargs):
             command = "command script add -f %s.%s %s" % (function.__module__, function.__name__, command_name)
             lldb.debugger.HandleCommand(command)
             self.function = function
-        def __call__(self, *args, **kwargs):
-            self.function(*args, **kwargs)
+        def __call__(self, debugger, command, exe_ctx, result, dict):
+            if len(inspect.getargspec(self.function).args) == 5:
+                self.function(debugger, command, exe_ctx, result, dict)
+            else:
+                self.function(debugger, command, result, dict)
     def callable(function):
         """Creates a callable object that gets used."""
-        return obj(function, *args, **kwargs)
+        f = obj(function, *args, **kwargs)
+        return f.__call__
     return callable
 
 class declaration(object):
@@ -1129,4 +1134,4 @@ def is_numeric_type(basic_type):
     #if basic_type == eBasicTypeOther:
     return (False,False)
 
-%}
+%}