Make objects embedded in optimized code weak.

src/mark-compact.h

Index: src/mark-compact.h
diff --git a/src/mark-compact.h b/src/mark-compact.h
index df2f7821139088c6a5691d9c7d583bd76cc47ffe..77c4d91a5f220e2194de9d1f57a3937d97620f16 100644
--- a/src/mark-compact.h
+++ b/src/mark-compact.h
@@ -637,7 +637,7 @@ class MarkCompactCollector {
   void VerifyMarkbitsAreClean();
   static void VerifyMarkbitsAreClean(PagedSpace* space);
   static void VerifyMarkbitsAreClean(NewSpace* space);
-  void VerifyWeakEmbeddedMapsInOptimizedCode();
+  void VerifyWeakEmbeddedObjectsInOptimizedCode();
   void VerifyOmittedMapChecks();
 #endif
 
@@ -842,6 +842,10 @@ class MarkCompactCollector {
   // the string table are weak.
   void MarkStringTable(RootMarkingVisitor* visitor);
 
+  // Mark the global table from weak objects to dependent code without

[Hannes Payer (out of office), 2013/10/01 13:13:50]

Mark the global table which maps weak objects to dependent...

[ulan, 2013/10/01 14:50:29]

Done.

+  // marking its contents.
+  void MarkWeakObjectToCode(RootMarkingVisitor* visitor);
+
   // Mark objects in implicit references groups if their parent object
   // is marked.
   void MarkImplicitRefGroups();
@@ -889,7 +893,7 @@ class MarkCompactCollector {
   void ClearNonLivePrototypeTransitions(Map* map);
   void ClearNonLiveMapTransitions(Map* map, MarkBit map_mark);
 
-  void ClearAndDeoptimizeDependentCode(Map* map);
+  void ClearAndDeoptimizeDependentCode(DependentCode* dependent_code);
   void ClearNonLiveDependentCode(DependentCode* dependent_code);
 
   // Marking detaches initial maps from SharedFunctionInfo objects