src/hotspot/share/jfr/leakprofiler/chains/bfsClosure.hpp
author phh
Sat, 30 Nov 2019 14:33:05 -0800
changeset 59330 5b96c12f909d
parent 55571 49102ba8cf14
permissions -rw-r--r--
8234541: C1 emits an empty message when it inlines successfully Summary: Use "inline" as the message when successfull Reviewed-by: thartmann, mdoerr Contributed-by: navy.xliu@gmail.com

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 * accompanied this code).
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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_BFSCLOSURE_HPP
#define SHARE_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP

#include "memory/iterator.hpp"

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

// Class responsible for iterating the heap breadth-first
class BFSClosure : public BasicOopIterateClosure {
 private:
  EdgeQueue* _edge_queue;
  EdgeStore* _edge_store;
  BitSet* _mark_bits;
  const Edge* _current_parent;
  mutable size_t _current_frontier_level;
  mutable size_t _next_frontier_idx;
  mutable size_t _prev_frontier_idx;
  size_t _dfs_fallback_idx;
  bool _use_dfs;

  void log_completed_frontier() const;
  void log_dfs_fallback() const;

  bool is_complete() const;
  void step_frontier() const;

  void closure_impl(const oop* reference, const oop pointee);
  void add_chain(const oop* reference, const oop pointee);
  void dfs_fallback();

  void iterate(const Edge* parent);
  void process(const oop* reference, const oop pointee);

  void process_root_set();
  void process_queue();

 public:
  BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits);
  void process();
  void do_root(const oop* ref);

  virtual void do_oop(oop* ref);
  virtual void do_oop(narrowOop* ref);
};

#endif // SHARE_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP