1 files changed, 54 insertions, 0 deletions
diff --git a/deps/v8/src/heap/cppgc-js/cross-heap-remembered-set.h b/deps/v8/src/heap/cppgc-js/cross-heap-remembered-set.h
new file mode 100644
index 0000000000..ba28c377f5
--- /dev/null
+++ b/deps/v8/src/heap/cppgc-js/cross-heap-remembered-set.h
@@ -0,0 +1,54 @@
+// Copyright 2022 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.
+
+#ifndef V8_HEAP_CPPGC_JS_CROSS_HEAP_REMEMBERED_SET_H_
+#define V8_HEAP_CPPGC_JS_CROSS_HEAP_REMEMBERED_SET_H_
+
+#include <vector>
+
+#include "src/base/macros.h"
+#include "src/handles/handles.h"
+#include "src/objects/js-objects.h"
+
+namespace cppgc::internal {
+class HeapBase;
+}
+
+namespace v8::internal {
+
+// The class is used to remember V8 to Oilpan references.
+class V8_EXPORT_PRIVATE CrossHeapRememberedSet final {
+ public:
+  explicit CrossHeapRememberedSet(cppgc::internal::HeapBase& heap_base)
+      : heap_base_(heap_base) {}
+
+  CrossHeapRememberedSet(const CrossHeapRememberedSet&) = delete;
+  CrossHeapRememberedSet(CrossHeapRememberedSet&&) = delete;
+
+  void RememberReferenceIfNeeded(Isolate& isolate, JSObject host_obj,
+                                 void* cppgc_object);
+  void Reset(Isolate& isolate);
+
+  template <typename F>
+  void Visit(Isolate&, F);
+
+  bool IsEmpty() const { return remembered_v8_to_cppgc_references_.empty(); }
+
+ private:
+  cppgc::internal::HeapBase& heap_base_;
+  // The vector keeps handles to remembered V8 objects that have outgoing
+  // references to the cppgc heap. Plese note that the handles are global.
+  std::vector<Handle<JSObject>> remembered_v8_to_cppgc_references_;
+};
+
+template <typename F>
+void CrossHeapRememberedSet::Visit(Isolate& isolate, F f) {
+  for (auto& obj : remembered_v8_to_cppgc_references_) {
+    f(*obj);
+  }
+}
+
+}  // namespace v8::internal
+
+#endif  // V8_HEAP_CPPGC_JS_CROSS_HEAP_REMEMBERED_SET_H_