[promises] Move PromiseReactionJob to c++

src/runtime/runtime-internal.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include <memory>
 
 #include "src/arguments.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 553 matching lines @@
     isolate->counters()->runtime_call_stats()->Print(stats_stream);
     isolate->counters()->runtime_call_stats()->Reset();
     if (args[0]->IsString())
       std::fclose(f);
     else
       std::fflush(f);
     return isolate->heap()->undefined_value();
   }
 }
 
+RUNTIME_FUNCTION(Runtime_EnqueuePromiseReactionJob) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 6);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, tasks, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, deferreds, 2);
+  CONVERT_ARG_HANDLE_CHECKED(Object, before_debug_event, 3);
+  CONVERT_ARG_HANDLE_CHECKED(Object, after_debug_event, 4);
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, reaction_context, 5);
+  Handle<PromiseHandleInfo> promise_handle_info =
+      isolate->factory()->NewPromiseHandleInfo(
+          value, tasks, deferreds, before_debug_event, after_debug_event,
+          reaction_context);

[adamk, 2016/10/11 17:56:41]

Rather than creating a function, I think you should be able to capture the
current native context here, from isolate->native_context().

+  isolate->EnqueueMicrotask(promise_handle_info);
+  return isolate->heap()->undefined_value();
+}
+
 RUNTIME_FUNCTION(Runtime_EnqueuePromiseResolveThenableJob) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 6);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, resolution, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, then, 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, resolve, 2);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, reject, 3);
   CONVERT_ARG_HANDLE_CHECKED(Object, before_debug_event, 4);
   CONVERT_ARG_HANDLE_CHECKED(Object, after_debug_event, 5);
   Handle<PromiseContainer> container = isolate->factory()->NewPromiseContainer(
@@ skipping 37 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_Typeof) {
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   return *Object::TypeOf(isolate, object);
 }
 
 }  // namespace internal
 }  // namespace v8