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src/share/vm/gc/serial/markSweep.hpp

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rev 12851 : 8138737: Remove oop_ms_adjust_pointers and use oop_iterate instead
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rev 12852 : [mq]: 8138737-remove-oop-ms-adjust-kbarrett-rev1
   1 /*
   2  * Copyright (c) 1997, 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  *


  33 #include "oops/oop.hpp"
  34 #include "runtime/timer.hpp"
  35 #include "utilities/growableArray.hpp"
  36 #include "utilities/stack.hpp"
  37 
  38 class ReferenceProcessor;
  39 class DataLayout;
  40 class SerialOldTracer;
  41 class STWGCTimer;
  42 
  43 // MarkSweep takes care of global mark-compact garbage collection for a
  44 // GenCollectedHeap using a four-phase pointer forwarding algorithm.  All
  45 // generations are assumed to support marking; those that can also support
  46 // compaction.
  47 //
  48 // Class unloading will only occur when a full gc is invoked.
  49 
  50 // declared at end
  51 class PreservedMark;
  52 class MarkAndPushClosure;

  53 
  54 class MarkSweep : AllStatic {
  55   //
  56   // Inline closure decls
  57   //
  58   class FollowRootClosure: public OopsInGenClosure {
  59    public:
  60     virtual void do_oop(oop* p);
  61     virtual void do_oop(narrowOop* p);
  62   };
  63 
  64   class FollowStackClosure: public VoidClosure {
  65    public:
  66     virtual void do_void();
  67   };
  68 
  69   class AdjustPointerClosure: public OopsInGenClosure {
  70    public:
  71     template <typename T> void do_oop_nv(T* p);
  72     virtual void do_oop(oop* p);
  73     virtual void do_oop(narrowOop* p);
  74 
  75     // This closure provides its own oop verification code.
  76     debug_only(virtual bool should_verify_oops() { return false; })
  77   };
  78 
  79   // Used for java/lang/ref handling
  80   class IsAliveClosure: public BoolObjectClosure {
  81    public:
  82     virtual bool do_object_b(oop p);
  83   };
  84 
  85   class KeepAliveClosure: public OopClosure {
  86    protected:
  87     template <class T> void do_oop_work(T* p);
  88    public:
  89     virtual void do_oop(oop* p);
  90     virtual void do_oop(narrowOop* p);
  91   };
  92 
  93   //
  94   // Friend decls
  95   //
  96   friend class AdjustPointerClosure;
  97   friend class KeepAliveClosure;
  98   friend class VM_MarkSweep;


 182 };
 183 
 184 class MarkAndPushClosure: public ExtendedOopClosure {
 185 public:
 186   template <typename T> void do_oop_nv(T* p);
 187   virtual void do_oop(oop* p);
 188   virtual void do_oop(narrowOop* p);
 189 
 190   virtual bool do_metadata();
 191   bool do_metadata_nv();
 192 
 193   virtual void do_klass(Klass* k);
 194   void do_klass_nv(Klass* k);
 195 
 196   virtual void do_cld(ClassLoaderData* cld);
 197   void do_cld_nv(ClassLoaderData* cld);
 198 
 199   void set_ref_processor(ReferenceProcessor* rp) {
 200     set_ref_processor_internal(rp);
 201   }











 202 };
 203 
 204 class PreservedMark VALUE_OBJ_CLASS_SPEC {
 205 private:
 206   oop _obj;
 207   markOop _mark;
 208 
 209 public:
 210   void init(oop obj, markOop mark) {
 211     _obj = obj;
 212     _mark = mark;
 213   }
 214 
 215   void adjust_pointer();
 216   void restore();
 217 };
 218 
 219 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_HPP
   1 /*
   2  * Copyright (c) 1997, 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  *


  33 #include "oops/oop.hpp"
  34 #include "runtime/timer.hpp"
  35 #include "utilities/growableArray.hpp"
  36 #include "utilities/stack.hpp"
  37 
  38 class ReferenceProcessor;
  39 class DataLayout;
  40 class SerialOldTracer;
  41 class STWGCTimer;
  42 
  43 // MarkSweep takes care of global mark-compact garbage collection for a
  44 // GenCollectedHeap using a four-phase pointer forwarding algorithm.  All
  45 // generations are assumed to support marking; those that can also support
  46 // compaction.
  47 //
  48 // Class unloading will only occur when a full gc is invoked.
  49 
  50 // declared at end
  51 class PreservedMark;
  52 class MarkAndPushClosure;
  53 class AdjustPointerClosure;
  54 
  55 class MarkSweep : AllStatic {
  56   //
  57   // Inline closure decls
  58   //
  59   class FollowRootClosure: public OopsInGenClosure {
  60    public:
  61     virtual void do_oop(oop* p);
  62     virtual void do_oop(narrowOop* p);
  63   };
  64 
  65   class FollowStackClosure: public VoidClosure {
  66    public:
  67     virtual void do_void();
  68   };
  69 










  70   // Used for java/lang/ref handling
  71   class IsAliveClosure: public BoolObjectClosure {
  72    public:
  73     virtual bool do_object_b(oop p);
  74   };
  75 
  76   class KeepAliveClosure: public OopClosure {
  77    protected:
  78     template <class T> void do_oop_work(T* p);
  79    public:
  80     virtual void do_oop(oop* p);
  81     virtual void do_oop(narrowOop* p);
  82   };
  83 
  84   //
  85   // Friend decls
  86   //
  87   friend class AdjustPointerClosure;
  88   friend class KeepAliveClosure;
  89   friend class VM_MarkSweep;


 173 };
 174 
 175 class MarkAndPushClosure: public ExtendedOopClosure {
 176 public:
 177   template <typename T> void do_oop_nv(T* p);
 178   virtual void do_oop(oop* p);
 179   virtual void do_oop(narrowOop* p);
 180 
 181   virtual bool do_metadata();
 182   bool do_metadata_nv();
 183 
 184   virtual void do_klass(Klass* k);
 185   void do_klass_nv(Klass* k);
 186 
 187   virtual void do_cld(ClassLoaderData* cld);
 188   void do_cld_nv(ClassLoaderData* cld);
 189 
 190   void set_ref_processor(ReferenceProcessor* rp) {
 191     set_ref_processor_internal(rp);
 192   }
 193 };
 194 
 195 class AdjustPointerClosure: public OopsInGenClosure {
 196  public:
 197   template <typename T> void do_oop_nv(T* p);
 198   virtual void do_oop(oop* p);
 199   virtual void do_oop(narrowOop* p);
 200   virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
 201 
 202   // This closure provides its own oop verification code.
 203   debug_only(virtual bool should_verify_oops() { return false; })
 204 };
 205 
 206 class PreservedMark VALUE_OBJ_CLASS_SPEC {
 207 private:
 208   oop _obj;
 209   markOop _mark;
 210 
 211 public:
 212   void init(oop obj, markOop mark) {
 213     _obj = obj;
 214     _mark = mark;
 215   }
 216 
 217   void adjust_pointer();
 218   void restore();
 219 };
 220 
 221 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_HPP
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