jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parNew/parOopClosures.hpp@fc2b798ab316

6883834: ParNew: assert(!_g->to()->is_in_reserved(obj),"Scanning field twice?") with LargeObjects tests
Summary: Fixed process_chunk_boundaries(), used for parallel card scanning when using ParNew/CMS, so as to prevent double-scanning, or worse, non-scanning of imprecisely marked objects exceeding parallel chunk size. Made some sizing parameters for parallel card scanning diagnostic, disabled ParallelGCRetainPLAB, and elaborated and clarified some comments.
Reviewed-by: stefank, johnc

     1 /*

     2  * Copyright (c) 2007, 2010, 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

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    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP

    28 #include "memory/genOopClosures.hpp"

    30 // Closures for ParNewGeneration

    32 class ParScanThreadState;

    33 class ParNewGeneration;

    34 typedef Padded<OopTaskQueue> ObjToScanQueue;

    35 typedef GenericTaskQueueSet<ObjToScanQueue> ObjToScanQueueSet;

    36 class ParallelTaskTerminator;

    38 class ParScanClosure: public OopsInGenClosure {

    39  protected:

    40   ParScanThreadState* _par_scan_state;

    41   ParNewGeneration*   _g;

    42   HeapWord*           _boundary;

    43   template <class T> void inline par_do_barrier(T* p);

    44   template <class T> void inline do_oop_work(T* p,

    45                                              bool gc_barrier,

    46                                              bool root_scan);

    47  public:

    48   ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);

    49 };

    51 class ParScanWithBarrierClosure: public ParScanClosure {

    52  public:

    53   ParScanWithBarrierClosure(ParNewGeneration* g,

    54                             ParScanThreadState* par_scan_state) :

    55     ParScanClosure(g, par_scan_state) {}

    56   virtual void do_oop(oop* p);

    57   virtual void do_oop(narrowOop* p);

    58   inline void do_oop_nv(oop* p);

    59   inline void do_oop_nv(narrowOop* p);

    60 };

    62 class ParScanWithoutBarrierClosure: public ParScanClosure {

    63  public:

    64   ParScanWithoutBarrierClosure(ParNewGeneration* g,

    65                                ParScanThreadState* par_scan_state) :

    66     ParScanClosure(g, par_scan_state) {}

    67   virtual void do_oop(oop* p);

    68   virtual void do_oop(narrowOop* p);

    69   inline void do_oop_nv(oop* p);

    70   inline void do_oop_nv(narrowOop* p);

    71 };

    73 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {

    74  public:

    75   ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,

    76                                        ParScanThreadState* par_scan_state) :

    77     ParScanClosure(g, par_scan_state) {}

    78   virtual void do_oop(oop* p);

    79   virtual void do_oop(narrowOop* p);

    80 };

    82 class ParRootScanWithoutBarrierClosure: public ParScanClosure {

    83  public:

    84   ParRootScanWithoutBarrierClosure(ParNewGeneration* g,

    85                                    ParScanThreadState* par_scan_state) :

    86     ParScanClosure(g, par_scan_state) {}

    87   virtual void do_oop(oop* p);

    88   virtual void do_oop(narrowOop* p);

    89 };

    91 class ParScanWeakRefClosure: public ScanWeakRefClosure {

    92  protected:

    93   ParScanThreadState* _par_scan_state;

    94   template <class T> inline void do_oop_work(T* p);

    95  public:

    96   ParScanWeakRefClosure(ParNewGeneration* g,

    97                         ParScanThreadState* par_scan_state);

    98   virtual void do_oop(oop* p);

    99   virtual void do_oop(narrowOop* p);

   100   inline void do_oop_nv(oop* p);

   101   inline void do_oop_nv(narrowOop* p);

   102 };

   104 class ParEvacuateFollowersClosure: public VoidClosure {

   105  private:

   106   ParScanThreadState* _par_scan_state;

   107   ParScanThreadState* par_scan_state() { return _par_scan_state; }

   109   // We want to preserve the specific types here (rather than "OopClosure")

   110   // for later de-virtualization of do_oop calls.

   111   ParScanWithoutBarrierClosure* _to_space_closure;

   112   ParScanWithoutBarrierClosure* to_space_closure() {

   113     return _to_space_closure;

   114   }

   115   ParRootScanWithoutBarrierClosure* _to_space_root_closure;

   116   ParRootScanWithoutBarrierClosure* to_space_root_closure() {

   117     return _to_space_root_closure;

   118   }

   120   ParScanWithBarrierClosure* _old_gen_closure;

   121   ParScanWithBarrierClosure* old_gen_closure () {

   122     return _old_gen_closure;

   123   }

   124   ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;

   125   ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {

   126     return _old_gen_root_closure;

   127   }

   129   ParNewGeneration* _par_gen;

   130   ParNewGeneration* par_gen() { return _par_gen; }

   132   ObjToScanQueueSet*  _task_queues;

   133   ObjToScanQueueSet*  task_queues() { return _task_queues; }

   135   ParallelTaskTerminator* _terminator;

   136   ParallelTaskTerminator* terminator() { return _terminator; }

   137  public:

   138   ParEvacuateFollowersClosure(

   139     ParScanThreadState* par_scan_state_,

   140     ParScanWithoutBarrierClosure* to_space_closure_,

   141     ParScanWithBarrierClosure* old_gen_closure_,

   142     ParRootScanWithoutBarrierClosure* to_space_root_closure_,

   143     ParNewGeneration* par_gen_,

   144     ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,

   145     ObjToScanQueueSet* task_queues_,

   146     ParallelTaskTerminator* terminator_);

   147   virtual void do_void();

   148 };

   150 #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/parNew/parOopClosures.hpp@fc2b798ab316

src/share/vm/gc_implementation/parNew/parOopClosures.hpp