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 // Mark or un-mark the regions containing the specified address range as archives. 62 static void mark_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 |