Version 5.0.71.2 (cherry-pick)

src/heap/store-buffer.h

Index: src/heap/store-buffer.h
diff --git a/src/heap/store-buffer.h b/src/heap/store-buffer.h
index 06a99a8dcc8e04673172cc8fe5565eb9c3ee3400..e7e9c985eb4c79c544033e722aed9d1f21eb4115 100644
--- a/src/heap/store-buffer.h
+++ b/src/heap/store-buffer.h
@@ -40,6 +40,41 @@ class StoreBuffer {
   base::VirtualMemory* virtual_memory_;
 };
 
+
+class LocalStoreBuffer BASE_EMBEDDED {
+ public:
+  explicit LocalStoreBuffer(Heap* heap)
+      : top_(new Node(nullptr)), heap_(heap) {}
+
+  ~LocalStoreBuffer() {
+    Node* current = top_;
+    while (current != nullptr) {
+      Node* tmp = current->next;
+      delete current;
+      current = tmp;
+    }
+  }
+
+  inline void Record(Address addr);
+  inline void Process(StoreBuffer* store_buffer);
+
+ private:
+  static const int kBufferSize = 16 * KB;
+
+  struct Node : Malloced {
+    explicit Node(Node* next_node) : next(next_node), count(0) {}
+
+    inline bool is_full() { return count == kBufferSize; }
+
+    Node* next;
+    Address buffer[kBufferSize];
+    int count;
+  };
+
+  Node* top_;
+  Heap* heap_;
+};
+
 }  // namespace internal
 }  // namespace v8