Prototype of mark-and-compact support for Harmony weak maps.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index a7a24b0c9eab7afdf8b0f54344167f3e7e480e36..56e246cff2e902111ea40a4a2c7eb29b0e036d72 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -132,6 +132,7 @@ inline Heap* _inline_get_heap_();
   V(Script, empty_script, EmptyScript)                                         \
   V(Smi, real_stack_limit, RealStackLimit)                                     \
   V(StringDictionary, intrinsic_function_names, IntrinsicFunctionNames)        \
+  V(Object, encountered_weak_maps, EncounteredWeakMaps)                        \

[Vyacheslav Egorov (Chromium), 2011/08/02 16:32:00]

Do we really need a separate root for this list?

I think just a field on the Heap or MarkCompactCollector should be enough.

[Michael Starzinger, 2011/08/03 08:47:05]

Done. I made it into a root to have the list available for shrinking of tables
after the GC (including a possible compaction) finished. But we do not yet
shrink anyways, so no need for it to be a root.

 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -1646,6 +1647,7 @@ class Heap {
   friend class Page;
   friend class Isolate;
   friend class MarkCompactCollector;
+  friend class StaticMarkingVisitor;
   friend class MapCompact;
 
   DISALLOW_COPY_AND_ASSIGN(Heap);