- Premark vm_isolate objects to avoid having to test for them

runtime/vm/heap.cc

 // Copyright (c) 2012, 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/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/compiler_stats.h"
 #include "vm/flags.h"
@@ skipping 112 matching lines @@
   old_space_->VisitObjectPointers(visitor);
   code_space_->VisitObjectPointers(visitor);
 }
 
 
 void Heap::IterateCodePointers(ObjectPointerVisitor* visitor) {
   code_space_->VisitObjectPointers(visitor);
 }
 
 
+void Heap::IterateNewObjects(ObjectVisitor* visitor) {
+  new_space_->VisitObjects(visitor);
+}
+
+
+void Heap::IterateOldObjects(ObjectVisitor* visitor) {
+  old_space_->VisitObjects(visitor);
+  code_space_->VisitObjects(visitor);
+}
+
+
+void Heap::IterateCodeObjects(ObjectVisitor* visitor) {
+  code_space_->VisitObjects(visitor);
+}
+
+
 RawInstructions* Heap::FindObjectInCodeSpace(FindObjectVisitor* visitor) {
   // The code heap can only have RawInstructions objects.
   RawObject* raw_obj = code_space_->FindObject(visitor);
   ASSERT((raw_obj == Object::null()) ||
          (raw_obj->GetClassId() == kInstructions));
   return reinterpret_cast<RawInstructions*>(raw_obj);
 }
 
 
 void Heap::CollectGarbage(Space space, ApiCallbacks api_callbacks) {
@@ skipping 106 matching lines @@
   isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
   isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart