Add debug mirror support for ES6 Map/Set iterators.

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/conversions.h"
 #include "src/isolate-inl.h"
@@ skipping 1704 matching lines @@
 Handle<JSDataView> Factory::NewJSDataView() {
   Handle<JSFunction> data_view_fun(
       isolate()->native_context()->data_view_fun());
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateJSObject(*data_view_fun),
       JSDataView);
 }
 
 
+Handle<JSMapIterator> Factory::NewJSMapIterator() {

[arv (Not doing code reviews), 2014/10/31 10:20:18]

Maybe this should take the table, index and kind since without those the
iterator is not going to behave reasonable.

[aandrey, 2014/10/31 10:43:22]

It's not easy given how the CALL_HEAP_FUNCTION macro is implemented.

+  Handle<Map> map(isolate()->native_context()->map_iterator_map());
+  CALL_HEAP_FUNCTION(isolate(),
+                     isolate()->heap()->AllocateJSObjectFromMap(*map),
+                     JSMapIterator);
+}
+
+
+Handle<JSSetIterator> Factory::NewJSSetIterator() {
+  Handle<Map> map(isolate()->native_context()->set_iterator_map());
+  CALL_HEAP_FUNCTION(isolate(),
+                     isolate()->heap()->AllocateJSObjectFromMap(*map),
+                     JSSetIterator);
+}
+
+
 namespace {
 
 ElementsKind GetExternalArrayElementsKind(ExternalArrayType type) {
   switch (type) {
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
   case kExternal##Type##Array:                          \
     return EXTERNAL_##TYPE##_ELEMENTS;
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
   }
   UNREACHABLE();
@@ skipping 747 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal