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src/share/vm/gc/cms/vmCMSOperations.hpp

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   1 /*
   2  * Copyright (c) 2005, 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 #ifndef SHARE_VM_GC_CMS_VMCMSOPERATIONS_HPP
  26 #define SHARE_VM_GC_CMS_VMCMSOPERATIONS_HPP
  27 
  28 #include "gc/cms/concurrentMarkSweepGeneration.hpp"
  29 #include "gc/shared/gcCause.hpp"
  30 #include "gc/shared/gcId.hpp"

  31 #include "gc/shared/vmGCOperations.hpp"
  32 #include "runtime/vm_operations.hpp"
  33 
  34 // The VM_CMS_Operation is slightly different from
  35 // a VM_GC_Operation -- and would not have subclassed easily
  36 // to VM_GC_Operation without several changes to VM_GC_Operation.
  37 // To minimize the changes, we have replicated some of the VM_GC_Operation
  38 // functionality here. We will consolidate that back by doing subclassing
  39 // as appropriate in Dolphin.
  40 //
  41 //  VM_Operation
  42 //    VM_CMS_Operation
  43 //    - implements the common portion of work done in support
  44 //      of CMS' stop-world phases (initial mark and remark).
  45 //
  46 //      VM_CMS_Initial_Mark
  47 //      VM_CMS_Final_Mark
  48 //
  49 
  50 // Forward decl.
  51 class CMSCollector;
  52 
  53 class VM_CMS_Operation: public VM_Operation {



  54  protected:
  55   CMSCollector*  _collector;                 // associated collector
  56   bool           _prologue_succeeded;     // whether doit_prologue succeeded
  57   uint           _gc_id;
  58 
  59   bool lost_race() const;
  60 
  61   // java.lang.ref.Reference support
  62   void acquire_pending_list_lock();
  63   void release_and_notify_pending_list_lock();
  64 
  65  public:
  66   VM_CMS_Operation(CMSCollector* collector):
  67     _collector(collector),
  68     _prologue_succeeded(false),
  69     _gc_id(GCId::current()) {}
  70   ~VM_CMS_Operation() {}
  71 
  72   // The legal collector state for executing this CMS op.
  73   virtual const CMSCollector::CollectorState legal_state() const = 0;


   1 /*
   2  * Copyright (c) 2005, 2016, 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_VM_GC_CMS_VMCMSOPERATIONS_HPP
  26 #define SHARE_VM_GC_CMS_VMCMSOPERATIONS_HPP
  27 
  28 #include "gc/cms/concurrentMarkSweepGeneration.hpp"
  29 #include "gc/shared/gcCause.hpp"
  30 #include "gc/shared/gcId.hpp"
  31 #include "gc/shared/referencePendingListLocker.hpp"
  32 #include "gc/shared/vmGCOperations.hpp"
  33 #include "runtime/vm_operations.hpp"
  34 
  35 // The VM_CMS_Operation is slightly different from
  36 // a VM_GC_Operation -- and would not have subclassed easily
  37 // to VM_GC_Operation without several changes to VM_GC_Operation.
  38 // To minimize the changes, we have replicated some of the VM_GC_Operation
  39 // functionality here. We will consolidate that back by doing subclassing
  40 // as appropriate in Dolphin.
  41 //
  42 //  VM_Operation
  43 //    VM_CMS_Operation
  44 //    - implements the common portion of work done in support
  45 //      of CMS' stop-world phases (initial mark and remark).
  46 //
  47 //      VM_CMS_Initial_Mark
  48 //      VM_CMS_Final_Mark
  49 //
  50 
  51 // Forward decl.
  52 class CMSCollector;
  53 
  54 class VM_CMS_Operation: public VM_Operation {
  55  private:
  56   ReferencePendingListLocker _pending_list_locker;
  57 
  58  protected:
  59   CMSCollector*  _collector;                 // associated collector
  60   bool           _prologue_succeeded;     // whether doit_prologue succeeded
  61   uint           _gc_id;
  62 
  63   bool lost_race() const;
  64 
  65   // java.lang.ref.Reference support
  66   void acquire_pending_list_lock();
  67   void release_and_notify_pending_list_lock();
  68 
  69  public:
  70   VM_CMS_Operation(CMSCollector* collector):
  71     _collector(collector),
  72     _prologue_succeeded(false),
  73     _gc_id(GCId::current()) {}
  74   ~VM_CMS_Operation() {}
  75 
  76   // The legal collector state for executing this CMS op.
  77   virtual const CMSCollector::CollectorState legal_state() const = 0;


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