Put newly allocated buffers at the right end of the buffers list

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 174 matching lines @@
          heap->mark_compact_collector()->is_compacting();
 }
 
 
 template <class T>
 struct WeakListVisitor;
 
 
 template <class T>
 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer,
-                      bool stop_after_young) {
+                      bool stop_after_young, Object** list_tail) {
   Object* undefined = heap->undefined_value();
   Object* head = undefined;
   T* tail = NULL;
   MarkCompactCollector* collector = heap->mark_compact_collector();
   bool record_slots = MustRecordSlots(heap);
 
   while (list != undefined) {
     // Check whether to keep the candidate in the list.
     T* candidate = reinterpret_cast<T*>(list);
 
@@ skipping 24 matching lines @@
       WeakListVisitor<T>::VisitPhantomObject(heap, candidate);
     }
 
     // Move to next element in the list.
     list = WeakListVisitor<T>::WeakNext(candidate);
   }
 
   // Terminate the list if there is one or more elements.
   if (tail != NULL) {
     WeakListVisitor<T>::SetWeakNext(tail, undefined);
+    if (list_tail) *list_tail = tail;
   }
   return head;
 }
 
 
 Object* VisitNewArrayBufferViewsWeakList(Heap* heap, Object* list,
                                          WeakObjectRetainer* retainer) {
   Object* undefined = heap->undefined_value();
   Object* previous = undefined;
   Object* head = undefined;
@@ skipping 113 matching lines @@
       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, false);
+        VisitWeakList<T>(heap, context->get(index), retainer, false, NULL);
 
     // Update the list head.
     context->set(index, list_head, UPDATE_WRITE_BARRIER);
 
     if (MustRecordSlots(heap)) {
       // Record the updated slot if necessary.
       Object** head_slot =
           HeapObject::RawField(context, FixedArray::SizeFor(index));
       heap->mark_compact_collector()->RecordSlot(head_slot, head_slot,
                                                  list_head);
@@ skipping 31 matching lines @@
     obj->set_weak_next(next);
   }
 
   static Object* WeakNext(JSArrayBuffer* obj) { return obj->weak_next(); }
 
   static int WeakNextOffset() { return JSArrayBuffer::kWeakNextOffset; }
 
   static void VisitLiveObject(Heap* heap, JSArrayBuffer* array_buffer,
                               WeakObjectRetainer* retainer) {
     Object* typed_array_obj = VisitWeakList<JSArrayBufferView>(
-        heap, array_buffer->weak_first_view(), retainer, false);
+        heap, array_buffer->weak_first_view(), retainer, false, NULL);
     array_buffer->set_weak_first_view(typed_array_obj);
     if (typed_array_obj != heap->undefined_value() && MustRecordSlots(heap)) {
       Object** slot = HeapObject::RawField(array_buffer,
                                            JSArrayBuffer::kWeakFirstViewOffset);
       heap->mark_compact_collector()->RecordSlot(slot, slot, typed_array_obj);
     }
   }
 
   static void VisitPhantomObject(Heap* heap, JSArrayBuffer* phantom) {
     Runtime::FreeArrayBuffer(heap->isolate(), phantom);
@@ skipping 12 matching lines @@
   static int WeakNextOffset() { return AllocationSite::kWeakNextOffset; }
 
   static void VisitLiveObject(Heap*, AllocationSite*, WeakObjectRetainer*) {}
 
   static void VisitPhantomObject(Heap*, AllocationSite*) {}
 };
 
 
 template Object* VisitWeakList<Context>(Heap* heap, Object* list,
                                         WeakObjectRetainer* retainer,
-                                        bool stop_after_young);
+                                        bool stop_after_young,
+                                        Object** list_tail);
 
 
 template Object* VisitWeakList<JSArrayBuffer>(Heap* heap, Object* list,
                                               WeakObjectRetainer* retainer,
-                                              bool stop_after_young);
+                                              bool stop_after_young,
+                                              Object** list_tail);
 
 template Object* VisitWeakList<JSArrayBufferView>(Heap* heap, Object* list,
                                                   WeakObjectRetainer* retainer,
-                                                  bool stop_after_young);
+                                                  bool stop_after_young,
+                                                  Object** list_tail);
 
 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list,
                                                WeakObjectRetainer* retainer,
-                                               bool stop_after_young);
+                                               bool stop_after_young,
+                                               Object** list_tail);
 }
 }  // namespace v8::internal