[VM generic function reification] Support generic functions in Invocation class.

runtime/lib/object.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bootstrap_natives.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/code_patcher.h"
 #include "vm/exceptions.h"
 #include "vm/heap.h"
@@ skipping 361 matching lines @@
   }
   for (intptr_t i = split; i < len; i++) {
     type = function_type_arguments.IsNull()
                ? Type::DynamicType()
                : function_type_arguments.TypeAt(i - split);
     result.SetTypeAt(i, type);
   }
   return result.Canonicalize();
 }
 
+DEFINE_NATIVE_ENTRY(InvocationMirror_unpackTypeArguments, 1) {
+  const TypeArguments& type_arguments =
+      TypeArguments::CheckedHandle(zone, arguments->NativeArgAt(0));
+  const intptr_t len = type_arguments.Length();
+  ASSERT(len > 0);
+  const Array& type_list = Array::Handle(zone, Array::New(len));
+  AbstractType& type = AbstractType::Handle(zone);
+  for (intptr_t i = 0; i < len; i++) {
+    type = type_arguments.TypeAt(i);
+    type_list.SetAt(i, type);
+  }
+  type_list.MakeImmutable();
+  return type_list.raw();
+}
+
 }  // namespace dart