1 files changed, 70 insertions, 0 deletions
diff --git a/deps/v8/src/heap/cppgc/marking-visitor.h b/deps/v8/src/heap/cppgc/marking-visitor.h
new file mode 100644
index 00000000000..33616b37844
--- /dev/null
+++ b/deps/v8/src/heap/cppgc/marking-visitor.h
@@ -0,0 +1,70 @@
+// Copyright 2020 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_MARKING_VISITOR_H_
+#define V8_HEAP_CPPGC_MARKING_VISITOR_H_
+
+#include "include/cppgc/source-location.h"
+#include "include/cppgc/trace-trait.h"
+#include "include/v8config.h"
+#include "src/heap/cppgc/globals.h"
+#include "src/heap/cppgc/heap-object-header.h"
+#include "src/heap/cppgc/heap-page.h"
+#include "src/heap/cppgc/heap.h"
+#include "src/heap/cppgc/marker.h"
+#include "src/heap/cppgc/stack.h"
+#include "src/heap/cppgc/visitor.h"
+
+namespace cppgc {
+namespace internal {
+
+class MarkingVisitor : public VisitorBase, public StackVisitor {
+ public:
+  MarkingVisitor(Marker*, int);
+  virtual ~MarkingVisitor() = default;
+
+  MarkingVisitor(const MarkingVisitor&) = delete;
+  MarkingVisitor& operator=(const MarkingVisitor&) = delete;
+
+  void FlushWorklists();
+
+  void DynamicallyMarkAddress(ConstAddress);
+
+  void AccountMarkedBytes(const HeapObjectHeader&);
+  size_t marked_bytes() const { return marked_bytes_; }
+
+  static bool IsInConstruction(const HeapObjectHeader&);
+
+ protected:
+  void Visit(const void*, TraceDescriptor) override;
+  void VisitWeak(const void*, TraceDescriptor, WeakCallback,
+                 const void*) override;
+  void VisitRoot(const void*, TraceDescriptor) override;
+  void VisitWeakRoot(const void*, TraceDescriptor, WeakCallback,
+                     const void*) override;
+
+  void VisitPointer(const void*) override;
+
+ private:
+  void MarkHeader(HeapObjectHeader*, TraceDescriptor);
+  bool MarkHeaderNoTracing(HeapObjectHeader*);
+  void RegisterWeakCallback(WeakCallback, const void*) override;
+
+  Marker* const marker_;
+  Marker::MarkingWorklist::View marking_worklist_;
+  Marker::NotFullyConstructedWorklist::View not_fully_constructed_worklist_;
+  Marker::WeakCallbackWorklist::View weak_callback_worklist_;
+
+  size_t marked_bytes_;
+};
+
+class V8_EXPORT_PRIVATE MutatorThreadMarkingVisitor : public MarkingVisitor {
+ public:
+  explicit MutatorThreadMarkingVisitor(Marker*);
+};
+
+}  // namespace internal
+}  // namespace cppgc
+
+#endif  // V8_HEAP_CPPGC_MARKING_VISITOR_H_