jdk-24/hotspot/src/share/vm/gc_implementation/parallelScavenge/psMarkSweep.hpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * 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_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP
#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP

#include "gc_implementation/shared/collectorCounters.hpp"
#include "gc_implementation/shared/markSweep.inline.hpp"
#include "utilities/stack.hpp"

class PSAdaptiveSizePolicy;
class PSYoungGen;
class PSOldGen;

class PSMarkSweep : public MarkSweep {
 private:
  static elapsedTimer        _accumulated_time;
  static jlong               _time_of_last_gc;   // ms
  static CollectorCounters*  _counters;

  // Closure accessors
  static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_closure; }
  static KlassClosure* follow_klass_closure() { return &MarkSweep::follow_klass_closure; }
  static VoidClosure* follow_stack_closure() { return (VoidClosure*)&MarkSweep::follow_stack_closure; }
  static OopClosure* adjust_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_pointer_closure; }
  static KlassClosure* adjust_klass_closure() { return &MarkSweep::adjust_klass_closure; }
  static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; }

 debug_only(public:)  // Used for PSParallelCompact debugging
  // Mark live objects
  static void mark_sweep_phase1(bool clear_all_softrefs);
  // Calculate new addresses
  static void mark_sweep_phase2();
 debug_only(private:) // End used for PSParallelCompact debugging
  // Update pointers
  static void mark_sweep_phase3();
  // Move objects to new positions
  static void mark_sweep_phase4();

 debug_only(public:)  // Used for PSParallelCompact debugging
  // Temporary data structures for traversal and storing/restoring marks
  static void allocate_stacks();
  static void deallocate_stacks();
  static void set_ref_processor(ReferenceProcessor* rp) {  // delete this method
    _ref_processor = rp;
  }
 debug_only(private:) // End used for PSParallelCompact debugging

  // If objects are left in eden after a collection, try to move the boundary
  // and absorb them into the old gen.  Returns true if eden was emptied.
  static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
                                         PSYoungGen* young_gen,
                                         PSOldGen* old_gen);

  // Reset time since last full gc
  static void reset_millis_since_last_gc();

 public:
  static void invoke(bool clear_all_softrefs);
  static bool invoke_no_policy(bool clear_all_softrefs);

  static void initialize();

  // Public accessors
  static elapsedTimer* accumulated_time() { return &_accumulated_time; }
  static CollectorCounters* counters()    { return _counters; }

  // Time since last full gc (in milliseconds)
  static jlong millis_since_last_gc();
};

#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP