ES6: Implement WeakSet

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index c5d5159e48ad03a1df03d9227af6d5a4bef4beba..964fc81e4495c5d3fb765aebd4a66ccb92417ed4 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -1967,6 +1967,10 @@ class ScavengingVisitor : public StaticVisitorBase {
                     &ObjectEvacuationStrategy<POINTER_OBJECT>::
                     Visit);
 
+    table_.Register(kVisitJSWeakSet,
+                    &ObjectEvacuationStrategy<POINTER_OBJECT>::
+                    Visit);
+
     table_.Register(kVisitJSArrayBuffer,
                     &ObjectEvacuationStrategy<POINTER_OBJECT>::
                     Visit);
@@ -7742,8 +7746,10 @@ GCTracer::~GCTracer() {
     PrintF("intracompaction_ptrs=%.1f ",
         scopes_[Scope::MC_UPDATE_POINTERS_BETWEEN_EVACUATED]);
     PrintF("misc_compaction=%.1f ", scopes_[Scope::MC_UPDATE_MISC_POINTERS]);
-    PrintF("weakmap_process=%.1f ", scopes_[Scope::MC_WEAKMAP_PROCESS]);
-    PrintF("weakmap_clear=%.1f ", scopes_[Scope::MC_WEAKMAP_CLEAR]);
+    PrintF("weakcollection_process=%.1f ",
+        scopes_[Scope::MC_WEAKCOLLECTION_PROCESS]);
+    PrintF("weakcollection_clear=%.1f ",
+        scopes_[Scope::MC_WEAKCOLLECTION_CLEAR]);
 
     PrintF("total_size_before=%" V8_PTR_PREFIX "d ", start_object_size_);
     PrintF("total_size_after=%" V8_PTR_PREFIX "d ", heap_->SizeOfObjects());