Lazy peer API.

runtime/vm/gc_marker.h

Index: runtime/vm/gc_marker.h
diff --git a/runtime/vm/gc_marker.h b/runtime/vm/gc_marker.h
index 7cd417cca488ae87f36b7354d7877a362e11dc48..b3a7ef5adcdd93525259836f7cfdd335bde38640 100644
--- a/runtime/vm/gc_marker.h
+++ b/runtime/vm/gc_marker.h
@@ -5,6 +5,8 @@
 #ifndef VM_GC_MARKER_H_
 #define VM_GC_MARKER_H_
 
+#include <map>

[siva, 2012/09/14 00:03:46]

I would prefer if we could have a local map and not have to use map from STL but
that is just my preference.

+
 #include "vm/allocation.h"
 
 namespace dart {
@@ -16,13 +18,15 @@ class Isolate;
 class MarkingVisitor;
 class ObjectPointerVisitor;
 class PageSpace;
+class RawObject;
 class RawWeakProperty;
 
 // The class GCMarker is used to mark reachable old generation objects as part
 // of the mark-sweep collection. The marking bit used is defined in RawObject.
 class GCMarker : public ValueObject {
  public:
-  explicit GCMarker(Heap* heap) : heap_(heap) { }
+  explicit GCMarker(Heap* heap, std::map<RawObject*, void*>* peer) :

[Anton Muhin, 2012/09/13 06:27:07]

nit: explicit can go away now

[cshapiro, 2012/09/15 01:23:41]

Thanks.  Done.

+      heap_(heap), peer_(peer) { }
   ~GCMarker() { }
 
   void MarkObjects(Isolate* isolate,
@@ -41,8 +45,10 @@ class GCMarker : public ValueObject {
   void IterateWeakReferences(Isolate* isolate, MarkingVisitor* visitor);
   void DrainMarkingStack(Isolate* isolate, MarkingVisitor* visitor);
   void ProcessWeakProperty(RawWeakProperty* raw_weak, MarkingVisitor* visitor);
+  void ProcessPeerReferents();
 
   Heap* heap_;
+  std::map<RawObject*, void*>* peer_;

[siva, 2012/09/14 00:03:46]

why not call it peer_table_ or peer_map_

[cshapiro, 2012/09/15 01:23:41]

Renamed.  Done.

 
   DISALLOW_IMPLICIT_CONSTRUCTORS(GCMarker);
 };