Visit code objects in native contexts only during full GCs.

src/heap/objects-visiting.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/heap/objects-visiting.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 285 matching lines @@
 
   static int WeakNextOffset() {
     return FixedArray::SizeFor(Context::NEXT_CONTEXT_LINK);
   }
 
   static void VisitLiveObject(Heap* heap, Context* context,
                               WeakObjectRetainer* retainer) {
     // Process the three weak lists linked off the context.
     DoWeakList<JSFunction>(heap, context, retainer,
                            Context::OPTIMIZED_FUNCTIONS_LIST);
-    DoWeakList<Code>(heap, context, retainer, Context::OPTIMIZED_CODE_LIST);
-    DoWeakList<Code>(heap, context, retainer, Context::DEOPTIMIZED_CODE_LIST);
+
+    // Code objects are always allocated in Code space, we do not have to visit
+    // them during scavenges.
+    if (heap->gc_state() == Heap::MARK_COMPACT) {
+      DoWeakList<Code>(heap, context, retainer, Context::OPTIMIZED_CODE_LIST);
+      DoWeakList<Code>(heap, context, retainer, Context::DEOPTIMIZED_CODE_LIST);
+    }
   }
 
   template <class T>
   static void DoWeakList(Heap* heap, Context* context,
                          WeakObjectRetainer* retainer, int index) {
     // Visit the weak list, removing dead intermediate elements.
     Object* list_head = VisitWeakList<T>(heap, context->get(index), retainer);
 
     // Update the list head.
     context->set(index, list_head, UPDATE_WRITE_BARRIER);
@@ skipping 89 matching lines @@
 
 
 template Object* VisitWeakList<JSArrayBuffer>(Heap* heap, Object* list,
                                               WeakObjectRetainer* retainer);
 
 
 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list,
                                                WeakObjectRetainer* retainer);
 }
 }  // namespace v8::internal