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

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 418cad72be73f8598690cc42e56edc7368d405e2..835a820698982d519b2765c704898836da3e1c99 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -156,6 +156,7 @@ Heap::Heap()
   memset(roots_, 0, sizeof(roots_[0]) * kRootListLength);
   set_native_contexts_list(NULL);
   set_array_buffers_list(Smi::FromInt(0));
+  set_last_array_buffer_in_list(Smi::FromInt(0));
   set_allocation_sites_list(Smi::FromInt(0));
   set_encountered_weak_collections(Smi::FromInt(0));
   set_encountered_weak_cells(Smi::FromInt(0));
@@ -1679,8 +1680,8 @@ void Heap::ProcessYoungWeakReferences(WeakObjectRetainer* retainer) {
 
 
 void Heap::ProcessNativeContexts(WeakObjectRetainer* retainer) {
-  Object* head =
-      VisitWeakList<Context>(this, native_contexts_list(), retainer, false);
+  Object* head = VisitWeakList<Context>(this, native_contexts_list(), retainer,
+                                        false, NULL);
   // Update the head of the list of contexts.
   set_native_contexts_list(head);
 }
@@ -1688,9 +1689,12 @@ void Heap::ProcessNativeContexts(WeakObjectRetainer* retainer) {
 
 void Heap::ProcessArrayBuffers(WeakObjectRetainer* retainer,
                                bool stop_after_young) {
-  Object* array_buffer_obj = VisitWeakList<JSArrayBuffer>(
-      this, array_buffers_list(), retainer, stop_after_young);
+  Object* last_array_buffer = undefined_value();
+  Object* array_buffer_obj =
+      VisitWeakList<JSArrayBuffer>(this, array_buffers_list(), retainer,
+                                   stop_after_young, &last_array_buffer);
   set_array_buffers_list(array_buffer_obj);
+  set_last_array_buffer_in_list(last_array_buffer);
 
   // Verify invariant that young array buffers come before old array buffers
   // in array buffers list if there was no promotion failure.
@@ -1711,7 +1715,7 @@ void Heap::ProcessArrayBuffers(WeakObjectRetainer* retainer,
 void Heap::ProcessNewArrayBufferViews(WeakObjectRetainer* retainer) {
   // Retain the list of new space views.
   Object* typed_array_obj = VisitWeakList<JSArrayBufferView>(
-      this, new_array_buffer_views_list_, retainer, false);
+      this, new_array_buffer_views_list_, retainer, false, NULL);
   set_new_array_buffer_views_list(typed_array_obj);
 
   // Some objects in the list may be in old space now. Find them
@@ -1735,7 +1739,7 @@ void Heap::TearDownArrayBuffers() {
 
 void Heap::ProcessAllocationSites(WeakObjectRetainer* retainer) {
   Object* allocation_site_obj = VisitWeakList<AllocationSite>(
-      this, allocation_sites_list(), retainer, false);
+      this, allocation_sites_list(), retainer, false, NULL);
   set_allocation_sites_list(allocation_site_obj);
 }
 
@@ -5344,6 +5348,7 @@ bool Heap::CreateHeapObjects() {
 
   set_native_contexts_list(undefined_value());
   set_array_buffers_list(undefined_value());
+  set_last_array_buffer_in_list(undefined_value());
   set_new_array_buffer_views_list(undefined_value());
   set_allocation_sites_list(undefined_value());
   return true;