[esnext] prototype runtime implementation for async functions

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 559f0a0292b689d78e05ce8ef0bf3a78633db533..6f7267de180e3088a92072ff3ee96b9b8fed8748 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -329,6 +329,7 @@ static bool IsVisibleInStackTrace(JSFunction* fun,
   }
   // Skip all frames until we've seen the caller.
   if (!(*seen_caller)) return false;
+
   // Functions defined in native scripts are not visible unless directly
   // exposed, in which case the native flag is set.
   // The --builtins-in-stack-traces command line flag allows including
@@ -336,6 +337,10 @@ static bool IsVisibleInStackTrace(JSFunction* fun,
   if (!FLAG_builtins_in_stack_traces && fun->shared()->IsBuiltin()) {
     return fun->shared()->native();
   }
+
+  // Async function wrappers are not visible in stack trace
+  if (IsAsyncFunction(fun->shared()->kind())) return false;

[caitp (gmail), 2016/04/26 22:01:30]

not needed anymore in Option C

+
   return true;
 }