1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. 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.

    22  *

    23  */

    24 

    25 #ifndef SHARE_GC_G1_G1FULLCOLLECTOR_HPP

    26 #define SHARE_GC_G1_G1FULLCOLLECTOR_HPP

    27 

    28 #include "gc/g1/g1FullGCCompactionPoint.hpp"

    29 #include "gc/g1/g1FullGCMarker.hpp"

    30 #include "gc/g1/g1FullGCOopClosures.hpp"

    31 #include "gc/shared/preservedMarks.hpp"

    32 #include "gc/shared/referenceProcessor.hpp"

    33 #include "gc/shared/taskqueue.hpp"

    34 #include "memory/allocation.hpp"

    35 

    36 class AbstractGangTask;

    37 class G1CMBitMap;

    38 class G1FullGCMarker;

    39 class G1FullGCScope;

    40 class G1FullGCCompactionPoint;

    41 class ReferenceProcessor;

    42 

    43 // The G1FullCollector holds data associated with the current Full GC.

    44 class G1FullCollector : StackObj {

    45   G1FullGCScope*            _scope;

    46   uint                      _num_workers;

    47   G1FullGCMarker**          _markers;

    48   G1FullGCCompactionPoint** _compaction_points;

    49   G1CMBitMap*               _mark_bitmap;

    50   OopQueueSet               _oop_queue_set;

    51   ObjArrayTaskQueueSet      _array_queue_set;

    52   PreservedMarksSet         _preserved_marks_set;

    53   ReferenceProcessor*       _reference_processor;

    54   G1FullGCCompactionPoint   _serial_compaction_point;

    55 

    56   G1IsAliveClosure          _is_alive;

    57   ReferenceProcessorIsAliveMutator _is_alive_mutator;

    58 

    59 public:

    60   G1FullCollector(G1FullGCScope* scope,

    61                   ReferenceProcessor* reference_processor,

    62                   G1CMBitMap* mark_bitmap,

    63                   uint workers);

    64   ~G1FullCollector();

    65 

    66   void prepare_collection();

    67   void collect();

    68   void complete_collection();

    69 

    70   G1FullGCScope*           scope() { return _scope; }

    71   uint                     workers() { return _num_workers; }

    72   G1FullGCMarker*          marker(uint id) { return _markers[id]; }

    73   G1FullGCCompactionPoint* compaction_point(uint id) { return _compaction_points[id]; }

    74   G1CMBitMap*              mark_bitmap() { return _mark_bitmap; }

    75   OopQueueSet*             oop_queue_set() { return &_oop_queue_set; }

    76   ObjArrayTaskQueueSet*    array_queue_set() { return &_array_queue_set; }

    77   PreservedMarksSet*       preserved_mark_set() { return &_preserved_marks_set; }

    78   ReferenceProcessor*      reference_processor() { return _reference_processor; }

    79   G1FullGCCompactionPoint* serial_compaction_point() { return &_serial_compaction_point; }

    80 

    81 private:

    82   void phase1_mark_live_objects();

    83   void phase2_prepare_compaction();

    84   void phase3_adjust_pointers();

    85   void phase4_do_compaction();

    86 

    87   void restore_marks();

    88   void verify_after_marking();

    89 

    90   void run_task(AbstractGangTask* task);

    91 

    92   // Prepare compaction extension support.

    93   void prepare_compaction_ext();

    94   void prepare_compaction_common();

    95 };

    96 

    97 

    98 #endif // SHARE_GC_G1_G1FULLCOLLECTOR_HPP