Age code to allow reclaiming old unexecuted functions

src/objects-visiting-inl.h

Index: src/objects-visiting-inl.h
diff --git a/src/objects-visiting-inl.h b/src/objects-visiting-inl.h
index 856ae06b7b133bb126371b40fbc42b9eed43b176..5efb4236ddf052db761cdcc82e10ac72e8cd256e 100644
--- a/src/objects-visiting-inl.h
+++ b/src/objects-visiting-inl.h
@@ -229,6 +229,18 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget(
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitCodeAgeSequence(
+    Heap* heap, RelocInfo* rinfo) {
+  ASSERT(RelocInfo::IsCodeAgeSequence(rinfo->rmode()));
+  Code* target = rinfo->code_age_stub();
+  if (target != NULL) {

[Michael Starzinger, 2012/09/21 09:43:19]

We should only reach this visit function if there actually is a target.

[danno, 2012/10/25 10:07:23]

Done.

+    heap->mark_compact_collector()->RecordRelocSlot(rinfo, target);
+    StaticVisitor::MarkObject(heap, target);
+  }
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitNativeContext(
     Map* map, HeapObject* object) {
   FixedBodyVisitor<StaticVisitor,
@@ -251,6 +263,9 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCode(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
   Code* code = Code::cast(object);
+  if (!Serializer::enabled()) {
+    code->MakeOlder();

[Michael Starzinger, 2012/09/21 09:43:19]

We can pass heap->mark_compact_collector()->marking_parity() here.

[danno, 2012/10/25 10:07:23]

Done.

+  }
   if (FLAG_cleanup_code_caches_at_gc) {
     code->ClearTypeFeedbackCells(heap);
   }