Fixing the treatment of annotations in the clang frontend

Reviewed By: jvillard

Differential Revision: D3488426

fbshipit-source-id: fe3cb1b

infer/src/clang/cMethod_trans.ml

@@ -348,11 +348,11 @@ let sil_method_annotation_of_args args : Typ.method_annotation =
   let mk_annot param_name annot_name =
     let annot = { Typ.class_name = annot_name; Typ.parameters = [param_name]; } in
     annot, default_visibility in
-  let arg_to_sil_annot acc (arg_name, type_ptr) =
+  let arg_to_sil_annot (arg_name, type_ptr) acc  =
     if CFrontend_utils.Ast_utils.is_type_nullable type_ptr then
       [mk_annot arg_name Annotations.nullable] :: acc
-    else acc in
-  let param_annots = IList.fold_left arg_to_sil_annot [] args in
+    else Typ.item_annotation_empty::acc in
+  let param_annots = IList.fold_right arg_to_sil_annot args []  in
   (* TODO: parse annotations on return value *)
   let retval_annot = [] in
   retval_annot, param_annots

infer/tests/codetoanalyze/objc/errors/npe/nullable.m

@@ -38,6 +38,20 @@ A* derefNullableParamOk(A* __nullable param) {
   return param;
 }
 
+int parameter_nullable_ok(NSString* body,
+                          __nullable NSString* linkTapAction,
+                          A* options) {
+  return options->fld;
+}
+
+int parameter_nullable_bug(__nullable A* options,
+                           NSAttributedString* body,
+                           NSString* linkTapAction)
+
+{
+  return options->fld;
+}
+
 int readNullableParamPropertyOk(B* __nullable param) { return param.prop; }
 
 void writeNullableParamPropertyOk(B* __nullable param) { param.prop = 7; }

infer/tests/endtoend/objc/NullableTest.java

@@ -49,8 +49,9 @@ public class NullableTest {
   public void nullDereferenceTest() throws InterruptedException, IOException, InferException {
     InferResults inferResults = InferRunner.runInferC(inferCmdNPD);
     String[] procedures = {
-      "derefNullableParamDirect",
-      "derefNullableParamIndirect"
+        "derefNullableParamDirect",
+        "derefNullableParamIndirect",
+        "parameter_nullable_bug"
     };
     assertThat(
         "Results should contain null pointer dereference error",