1 files changed, 40 insertions, 0 deletions
diff --git a/deps/v8/src/heap/traced-handles-marking-visitor.h b/deps/v8/src/heap/traced-handles-marking-visitor.h
new file mode 100644
index 0000000000..ddcc1dcb7e
--- /dev/null
+++ b/deps/v8/src/heap/traced-handles-marking-visitor.h
@@ -0,0 +1,40 @@
+// 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_TRACED_HANDLES_MARKING_VISITOR_H_
+#define V8_HEAP_TRACED_HANDLES_MARKING_VISITOR_H_
+
+#include "src/handles/traced-handles.h"
+#include "src/heap/base/stack.h"
+#include "src/heap/heap.h"
+#include "src/heap/mark-compact.h"
+
+namespace v8 {
+namespace internal {
+
+// Marking visitor for conservatively marking handles creates through
+// `TracedHandles`. The visitor assumes that pointers (on stack, or
+// conservatively scanned on-heap) may point into traced handle nodes which
+// requires them to be kept alive.
+class ConservativeTracedHandlesMarkingVisitor final
+    : public ::heap::base::StackVisitor {
+ public:
+  ConservativeTracedHandlesMarkingVisitor(Heap&, MarkingWorklists::Local&,
+                                          cppgc::internal::CollectionType);
+  ~ConservativeTracedHandlesMarkingVisitor() override = default;
+
+  void VisitPointer(const void*) override;
+
+ private:
+  Heap& heap_;
+  MarkingState& marking_state_;
+  MarkingWorklists::Local& local_marking_worklist_;
+  const TracedHandles::NodeBounds traced_node_bounds_;
+  const TracedHandles::MarkMode mark_mode_;
+};
+
+#endif  // V8_HEAP_TRACED_HANDLES_MARKING_VISITOR_H_
+
+}  // namespace internal
+}  // namespace v8