1 /*

     2  * Copyright (c) 2015, 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 #include "gc/g1/bufferingOopClosure.hpp"

    26 #include "gc/g1/g1CodeBlobClosure.hpp"

    27 #include "gc/g1/g1CollectedHeap.hpp"

    28 #include "gc/g1/g1OopClosures.inline.hpp"

    29 #include "gc/g1/g1RootClosures.hpp"

    30 

    31 // Simple holder object for a complete set of closures used by the G1 evacuation code.

    32 template <G1Mark Mark>

    33 class G1SharedClosures VALUE_OBJ_CLASS_SPEC {

    34 public:

    35   G1ParCopyClosure<G1BarrierNone,  Mark> _oops;

    36   G1ParCopyClosure<G1BarrierKlass, Mark> _oop_in_klass;

    37   G1KlassScanClosure                     _klass_in_cld_closure;

    38   CLDToKlassAndOopClosure                _clds;

    39   G1CodeBlobClosure                      _codeblobs;

    40   BufferingOopClosure                    _buffered_oops;

    41 

    42   G1SharedClosures(G1CollectedHeap* g1h, G1ParScanThreadState* pss, bool process_only_dirty_klasses, bool must_claim_cld) :

    43     _oops(g1h, pss),

    44     _oop_in_klass(g1h, pss),

    45     _klass_in_cld_closure(&_oop_in_klass, process_only_dirty_klasses),

    46     _clds(&_klass_in_cld_closure, &_oops, must_claim_cld),

    47     _codeblobs(&_oops),

    48     _buffered_oops(&_oops) {}

    49 };

    50 

    51 class G1EvacuationClosures : public G1EvacuationRootClosures {

    52   G1SharedClosures<G1MarkNone> _closures;

    53 

    54 public:

    55   G1EvacuationClosures(G1CollectedHeap* g1h,

    56                        G1ParScanThreadState* pss,

    57                        bool gcs_are_young) :

    58       _closures(g1h, pss, gcs_are_young, /* must_claim_cld */ false) {}

    59 

    60   OopClosure* weak_oops()   { return &_closures._buffered_oops; }

    61   OopClosure* strong_oops() { return &_closures._buffered_oops; }

    62 

    63   CLDClosure* weak_clds()             { return &_closures._clds; }

    64   CLDClosure* strong_clds()           { return &_closures._clds; }

    65   CLDClosure* thread_root_clds()      { return NULL; }

    66   CLDClosure* second_pass_weak_clds() { return NULL; }

    67 

    68   CodeBlobClosure* strong_codeblobs()      { return &_closures._codeblobs; }

    69   CodeBlobClosure* weak_codeblobs()        { return &_closures._codeblobs; }

    70 

    71   void flush()                 { _closures._buffered_oops.done(); }

    72   double closure_app_seconds() { return _closures._buffered_oops.closure_app_seconds(); }

    73 

    74   OopClosure* raw_strong_oops() { return &_closures._oops; }

    75 

    76   bool trace_metadata()         { return false; }

    77 };