JDK14/Java14源码在线阅读

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 * 2 along with this work; if not, write to the Free Software Foundation,
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#ifndef SHARE_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
#define SHARE_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP

#include "jfr/leakprofiler/utilities/unifiedOopRef.hpp"
#include "memory/iterator.hpp"

class BitSet;
class Edge;
class EdgeStore;
class EdgeQueue;

// Class responsible for iterating the heap depth-first
class DFSClosure : public BasicOopIterateClosure {
 private:
  static EdgeStore* _edge_store;
  static BitSet*    _mark_bits;
  static const Edge*_start_edge;
  static size_t _max_depth;
  static bool _ignore_root_set;
  DFSClosure* _parent;
  UnifiedOopRef _reference;
  size_t _depth;

  void add_chain();
  void closure_impl(UnifiedOopRef reference, const oop pointee);

  DFSClosure* parent() const { return _parent; }
  UnifiedOopRef reference() const { return _reference; }

  DFSClosure(DFSClosure* parent, size_t depth);
  DFSClosure();

 public:
  virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS_EXCEPT_REFERENT; }
  virtual bool should_verify_oops() { return false; }

  static void find_leaks_from_edge(EdgeStore* edge_store, BitSet* mark_bits, const Edge* start_edge);

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