[dynamo][easy] forbid_in_graph check to use getattr_static (#124445)

Pull Request resolved: https://github.com/pytorch/pytorch/pull/124445
Approved by: https://github.com/yanboliang, https://github.com/jansel

torch/_dynamo/trace_rules.py

@@ -3064,7 +3064,7 @@ def is_callable_disallowed(obj) -> bool:
 
 def is_forbidden(obj) -> bool:
     _maybe_init_lazy_module(obj)
-    return getattr(obj, "_dynamo_forbidden", False)
+    return inspect.getattr_static(obj, "_dynamo_forbidden", False)
 
 
 def is_builtin_callable(obj) -> bool:

torch/_dynamo/variables/nn_module.py

@@ -791,7 +791,10 @@ class UnspecializedNNModuleVariable(UserDefinedObjectVariable):
                     kwargs,
                 )
 
-            if id(method.__code__) in self._nn_module_method_ids():
+            if (
+                hasattr(method, "__code__")
+                and id(method.__code__) in self._nn_module_method_ids()
+            ):
                 unimplemented(f"UnspecializedNNModuleVariable missing {name}")
 
             # "_parameters" in self.value.__dict__ checks that module is initialized