1 files changed, 27 insertions, 0 deletions
diff --git a/deps/v8/src/objects/embedder-data-array.cc b/deps/v8/src/objects/embedder-data-array.cc
new file mode 100644
index 0000000000..665a1fa2f4
--- /dev/null
+++ b/deps/v8/src/objects/embedder-data-array.cc
@@ -0,0 +1,27 @@
+// Copyright 2018 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/objects/embedder-data-array.h"
+#include "src/objects/embedder-data-array-inl.h"
+
+namespace v8 {
+namespace internal {
+
+// static
+Handle<EmbedderDataArray> EmbedderDataArray::EnsureCapacity(
+    Isolate* isolate, Handle<EmbedderDataArray> array, int index) {
+  if (index < array->length()) return array;
+  DCHECK_LT(index, kMaxLength);
+  Handle<EmbedderDataArray> new_array =
+      isolate->factory()->NewEmbedderDataArray(index + 1);
+  DisallowHeapAllocation no_gc;
+  // Last new space allocation does not require any write barriers.
+  size_t size = array->length() * kEmbedderDataSlotSize;
+  MemCopy(reinterpret_cast<void*>(new_array->slots_start()),
+          reinterpret_cast<void*>(array->slots_start()), size);
+  return new_array;
+}
+
+}  // namespace internal
+}  // namespace v8