rev 59534 : 8245961: Shenandoah: move some root marking to concurrent phase

   1 /*
   2  * Copyright (c) 2013, 2020, Red Hat, Inc. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
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  23  */
  24 
  25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCONCURRENTMARK_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHCONCURRENTMARK_HPP
  27 
  28 #include "gc/shared/taskqueue.hpp"
  29 #include "gc/shared/taskTerminator.hpp"
  30 #include "gc/shenandoah/shenandoahOopClosures.hpp"
  31 #include "gc/shenandoah/shenandoahPhaseTimings.hpp"
  32 #include "gc/shenandoah/shenandoahTaskqueue.hpp"
  33 
  34 class ShenandoahStrDedupQueue;
  35 
  36 class ShenandoahConcurrentMark: public CHeapObj<mtGC> {
  37 private:
  38   ShenandoahHeap* _heap;
  39   ShenandoahObjToScanQueueSet* _task_queues;
  40 
  41 public:
  42   void initialize(uint workers);
  43   void cancel();
  44 
  45 // ---------- Marking loop and tasks
  46 //
  47 private:
  48   template <class T>
  49   inline void do_task(ShenandoahObjToScanQueue* q, T* cl, ShenandoahLiveData* live_data, ShenandoahMarkTask* task);
  50 
  51   template <class T>
  52   inline void do_chunked_array_start(ShenandoahObjToScanQueue* q, T* cl, oop array);
  53 
  54   template <class T>
  55   inline void do_chunked_array(ShenandoahObjToScanQueue* q, T* cl, oop array, int chunk, int pow);
  56 
  57   inline void count_liveness(ShenandoahLiveData* live_data, oop obj);
  58 
  59   template <class T, bool CANCELLABLE>
  60   void mark_loop_work(T* cl, ShenandoahLiveData* live_data, uint worker_id, TaskTerminator *t);
  61 
  62   template <bool CANCELLABLE>
  63   void mark_loop_prework(uint worker_id, TaskTerminator *terminator, ReferenceProcessor *rp, bool strdedup);
  64 
  65 public:
  66   void mark_loop(uint worker_id, TaskTerminator* terminator, ReferenceProcessor *rp,
  67                  bool cancellable, bool strdedup) {
  68     if (cancellable) {
  69       mark_loop_prework<true>(worker_id, terminator, rp, strdedup);
  70     } else {
  71       mark_loop_prework<false>(worker_id, terminator, rp, strdedup);
  72     }
  73   }
  74 
  75   template<class T, UpdateRefsMode UPDATE_REFS, StringDedupMode STRING_DEDUP>
  76   static inline void mark_through_ref(T* p, ShenandoahHeap* heap, ShenandoahObjToScanQueue* q, ShenandoahMarkingContext* const mark_context);
  77 
  78   void mark_from_roots();
  79   void finish_mark_from_roots(bool full_gc);
  80 
  81   void mark_roots(ShenandoahPhaseTimings::Phase root_phase);
  82   void update_roots(ShenandoahPhaseTimings::Phase root_phase);
  83   void update_thread_roots(ShenandoahPhaseTimings::Phase root_phase);
  84 
  85 // ---------- Weak references
  86 //
  87 private:
  88   void weak_refs_work(bool full_gc);
  89   void weak_refs_work_doit(bool full_gc);
  90 
  91 public:
  92   void preclean_weak_refs();
  93 










  94 // ---------- Helpers
  95 // Used from closures, need to be public
  96 //
  97 public:
  98   ShenandoahObjToScanQueue* get_queue(uint worker_id);
  99   ShenandoahObjToScanQueueSet* task_queues() { return _task_queues; }
 100 
 101 };
 102 
 103 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCONCURRENTMARK_HPP
--- EOF ---