Add debug mirror support for ES6 Map/Set iterators.

src/runtime/runtime-collections.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/v8.h"
 
 #include "src/arguments.h"
 #include "src/runtime/runtime-utils.h"
 
 
@@ skipping 74 matching lines @@
   RUNTIME_ASSERT(kind == JSSetIterator::kKindValues ||
                  kind == JSSetIterator::kKindEntries);
   Handle<OrderedHashSet> table(OrderedHashSet::cast(set->table()));
   holder->set_table(*table);
   holder->set_index(Smi::FromInt(0));
   holder->set_kind(Smi::FromInt(kind));
   return isolate->heap()->undefined_value();
 }
 
 
+RUNTIME_FUNCTION(Runtime_SetIteratorClone) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSSetIterator, holder, 0);
+
+  Handle<JSSetIterator> result = isolate->factory()->NewJSSetIterator();
+  result->set_table(holder->table());
+  result->set_index(Smi::FromInt(Smi::cast(holder->index())->value()));
+  result->set_kind(Smi::FromInt(Smi::cast(holder->kind())->value()));
+
+  return *result;
+}
+
+
 RUNTIME_FUNCTION(Runtime_SetIteratorNext) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_CHECKED(JSSetIterator, holder, 0);
   CONVERT_ARG_CHECKED(JSArray, value_array, 1);
   return holder->Next(value_array);
 }
 
 
 RUNTIME_FUNCTION(Runtime_MapInitialize) {
@@ skipping 85 matching lines @@
                  kind == JSMapIterator::kKindValues ||
                  kind == JSMapIterator::kKindEntries);
   Handle<OrderedHashMap> table(OrderedHashMap::cast(map->table()));
   holder->set_table(*table);
   holder->set_index(Smi::FromInt(0));
   holder->set_kind(Smi::FromInt(kind));
   return isolate->heap()->undefined_value();
 }
 
 
+RUNTIME_FUNCTION(Runtime_MapIteratorClone) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSMapIterator, holder, 0);
+
+  Handle<JSMapIterator> result = isolate->factory()->NewJSMapIterator();
+  result->set_table(holder->table());
+  result->set_index(Smi::FromInt(Smi::cast(holder->index())->value()));
+  result->set_kind(Smi::FromInt(Smi::cast(holder->kind())->value()));
+
+  return *result;
+}
+
+
 RUNTIME_FUNCTION(Runtime_GetWeakMapEntries) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, holder, 0);
   Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
   Handle<FixedArray> entries =
       isolate->factory()->NewFixedArray(table->NumberOfElements() * 2);
   {
     DisallowHeapAllocation no_gc;
     int number_of_non_hole_elements = 0;
@@ skipping 135 matching lines @@
   // isolate. If it's called more often, the map should be moved into the
   // strong root list.
   Handle<Map> map =
       isolate->factory()->NewMap(JS_WEAK_MAP_TYPE, JSWeakMap::kSize);
   Handle<JSWeakMap> weakmap =
       Handle<JSWeakMap>::cast(isolate->factory()->NewJSObjectFromMap(map));
   return *WeakCollectionInitialize(isolate, weakmap);
 }
 }
 }  // namespace v8::internal