[pulse] Havoc actuals when lengths of actuals and formals mismatch

Summary:
In Pulse, it usually havoc the actual parameters to unknown functions. However, it did not do that when the lengths of actuals and formals mismatch, which may happen when the frontend doesn't have enough information about procedures.

This diff havoc the actual parameters, also when there is mismatch between lengths of actuals and formals.

Reviewed By: ezgicicek

Differential Revision: D27163143

fbshipit-source-id: 1c5e0853a

infer/src/pulse/PulseCallOperations.ml

@@ -58,12 +58,15 @@ let unknown_call tenv call_loc reason ~ret ~actuals ~formals_opt astate =
     | _ ->
         astate
   in
-  L.d_printfln "skipping unknown procedure@." ;
+  let havoc_actuals_without_typ_info astate =
-  ( match formals_opt with
-  | None ->
     List.fold actuals
       ~f:(fun astate actual_typ -> havoc_actual_if_ptr actual_typ None astate)
       ~init:astate
+  in
+  L.d_printfln "skipping unknown procedure@." ;
+  ( match formals_opt with
+  | None ->
+      havoc_actuals_without_typ_info astate
   | Some formals -> (
     match
       List.fold2 actuals formals
@@ -74,7 +77,7 @@ let unknown_call tenv call_loc reason ~ret ~actuals ~formals_opt astate =
     | Unequal_lengths ->
         L.d_printfln "ERROR: formals have length %d but actuals have length %d"
           (List.length formals) (List.length actuals) ;
-        astate
+        havoc_actuals_without_typ_info astate
     | Ok result ->
         result ) )
   |> havoc_ret ret |> add_skipped_proc