1 files changed, 47 insertions, 0 deletions
diff --git a/deps/v8/src/roots/roots.cc b/deps/v8/src/roots/roots.cc
new file mode 100644
index 0000000000..e2ca6e5897
--- /dev/null
+++ b/deps/v8/src/roots/roots.cc
@@ -0,0 +1,47 @@
+// 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/roots/roots.h"
+
+#include "src/objects/elements-kind.h"
+#include "src/objects/objects-inl.h"
+#include "src/objects/visitors.h"
+
+namespace v8 {
+namespace internal {
+
+const char* RootsTable::root_names_[RootsTable::kEntriesCount] = {
+#define ROOT_NAME(type, name, CamelName) #name,
+    ROOT_LIST(ROOT_NAME)
+#undef ROOT_NAME
+};
+
+void ReadOnlyRoots::Iterate(RootVisitor* visitor) {
+  visitor->VisitRootPointers(Root::kReadOnlyRootList, nullptr,
+                             FullObjectSlot(read_only_roots_),
+                             FullObjectSlot(&read_only_roots_[kEntriesCount]));
+  visitor->Synchronize(VisitorSynchronization::kReadOnlyRootList);
+}
+
+#ifdef DEBUG
+
+bool ReadOnlyRoots::CheckType(RootIndex index) const {
+  Object root(at(index));
+  switch (index) {
+#define CHECKTYPE(Type, name, CamelName) \
+  case RootIndex::k##CamelName:          \
+    return root.Is##Type();
+    READ_ONLY_ROOT_LIST(CHECKTYPE)
+#undef CHECKTYPE
+
+    default:
+      UNREACHABLE();
+      return false;
+  }
+}
+
+#endif  // DEBUG
+
+}  // namespace internal
+}  // namespace v8