41 // G1CollectedHeap using a four-phase pointer forwarding algorithm.  All
  42 // generations are assumed to support marking; those that can also support
  43 // compaction.
  44 //
  45 // Class unloading will only occur when a full gc is invoked.
  46 class G1PrepareCompactClosure;
  47 class G1ArchiveRegionMap;
  48 
  49 class G1MarkSweep : AllStatic {
  50  public:
  51 
  52   static void invoke_at_safepoint(ReferenceProcessor* rp,
  53                                   bool clear_all_softrefs);
  54 
  55   static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; }
  56   static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; }
  57 
  58   // Create the _archive_region_map which is used to identify archive objects.
  59   static void enable_archive_object_check();
  60 
  61   // Mark the regions containing the specified address range as archive regions.
  62   static void mark_range_archive(MemRegion range);
  63 
  64   // Check if an object is in an archive region using the _archive_region_map.
  65   static bool in_archive_range(oop object);
  66 
  67   // Check if archive object checking is enabled, to avoid calling in_archive_range
  68   // unnecessarily.
  69   static bool archive_check_enabled() { return G1MarkSweep::_archive_check_enabled; }
  70 
  71  private:
  72   static bool _archive_check_enabled;
  73   static G1ArchiveRegionMap  _archive_region_map;
  74 
  75   // Mark live objects
  76   static void mark_sweep_phase1(bool& marked_for_deopt,
  77                                 bool clear_all_softrefs);
  78   // Calculate new addresses
  79   static void mark_sweep_phase2();
  80   // Update pointers
  81   static void mark_sweep_phase3();
  82   // Move objects to new positions

  41 // G1CollectedHeap using a four-phase pointer forwarding algorithm.  All
  42 // generations are assumed to support marking; those that can also support
  43 // compaction.
  44 //
  45 // Class unloading will only occur when a full gc is invoked.
  46 class G1PrepareCompactClosure;
  47 class G1ArchiveRegionMap;
  48 
  49 class G1MarkSweep : AllStatic {
  50  public:
  51 
  52   static void invoke_at_safepoint(ReferenceProcessor* rp,
  53                                   bool clear_all_softrefs);
  54 
  55   static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; }
  56   static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; }
  57 
  58   // Create the _archive_region_map which is used to identify archive objects.
  59   static void enable_archive_object_check();
  60 
  61   // Set the regions containing the specified address range as archive/non-archive.
  62   static void set_range_archive(MemRegion range, bool is_archive);
  63 
  64   // Check if an object is in an archive region using the _archive_region_map.
  65   static bool in_archive_range(oop object);
  66 
  67   // Check if archive object checking is enabled, to avoid calling in_archive_range
  68   // unnecessarily.
  69   static bool archive_check_enabled() { return G1MarkSweep::_archive_check_enabled; }
  70 
  71  private:
  72   static bool _archive_check_enabled;
  73   static G1ArchiveRegionMap  _archive_region_map;
  74 
  75   // Mark live objects
  76   static void mark_sweep_phase1(bool& marked_for_deopt,
  77                                 bool clear_all_softrefs);
  78   // Calculate new addresses
  79   static void mark_sweep_phase2();
  80   // Update pointers
  81   static void mark_sweep_phase3();
  82   // Move objects to new positions