[nullsafe] Respect external models when decide wether to report on passing wrong param or not

Summary:
This is a dirty hack to make nullsafe behave consistently for internal
and external models.

Medium term this code needs to be rewritten in a better way, so that we
pass all information in annotated signature (either in form of Inferred
nullability, or type origin, which tracks third party calls).

As a follow up, we will make reporting more clear.

Reviewed By: artempyanykh

Differential Revision: D18372660

fbshipit-source-id: 12c2449e1

infer/src/nullsafe/eradicateChecks.ml

@@ -443,7 +443,8 @@ let check_call_parameters ~is_strict_mode tenv find_canonical_duplicate curr_pde
         (* TODO(T52947663) model is_external as unknown nullability and move the logic out of this check  *)
         (* If method is external, we don't check it, unless it is explicitly modelled *)
         (not (Typ.Procname.Java.is_external java_pname))
-        || Models.is_modelled_for_nullability callee_pname
+        || Models.is_modelled_for_nullability_as_internal callee_pname
+        || Models.is_modelled_for_nullability_as_external callee_pname
     | _ ->
         false
   in

infer/src/nullsafe/models.ml

@@ -96,7 +96,10 @@ let get_modelled_annotated_signature tenv proc_attributes =
 
 
 (** Return true when the procedure has been modelled for nullability. *)
-let is_modelled_for_nullability proc_name =
+let is_modelled_for_nullability_as_internal proc_name =
+  (* TODO: get rid of this function, and propagate this information in get_modelled_annotated_signature instead
+   to avoid double calculation and make the code more clear.
+  *)
   let proc_id = Typ.Procname.to_unique_id proc_name in
   try
     ignore (Hashtbl.find annotated_table_nullability proc_id) ;
@@ -104,6 +107,19 @@ let is_modelled_for_nullability proc_name =
   with Caml.Not_found -> false
 
 
+(** Return true when the procedure has been modelled for nullability as external third-party code. *)
+let is_modelled_for_nullability_as_external proc_name =
+  (* TODO: get rid of this function, and propagate this information in get_modelled_annotated_signature instead
+     to avoid double calculation and make the code more clear.
+  *)
+  get_unique_repr proc_name
+  |> Option.map
+       ~f:
+         (ThirdPartyAnnotationInfo.find_nullability_info
+            (ThirdPartyAnnotationGlobalRepo.get_repo ()))
+  |> Option.is_some
+
+
 (** Check if the procedure is one of the known Preconditions.checkNotNull. *)
 let is_check_not_null proc_name =
   table_has_procedure check_not_null_table proc_name || match_method_name proc_name "checkNotNull"

infer/src/nullsafe/typeOrigin.ml

@@ -57,7 +57,8 @@ let get_description origin =
   | Proc po ->
       let modelled_in =
         (* TODO(T54088319) don't calculate this info and propagate it from AnnotatedNullability instead *)
-        if Models.is_modelled_for_nullability po.pname then " modelled in " ^ ModelTables.this_file
+        if Models.is_modelled_for_nullability_as_internal po.pname then
+          " modelled in " ^ ModelTables.this_file
         else ""
       in
       let description =