1 /*
   2  * Copyright (c) 2019, Red Hat, Inc. 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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
  25 #define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
  26 
  27 #include "memory/iterator.hpp"
  28 
  29 class ShenandoahHeap;
  30 class ShenandoahMarkingContext;
  31 class ShenandoahHeapRegionSet;
  32 class Thread;
  33 
  34 class ShenandoahForwardedIsAliveClosure: public BoolObjectClosure {
  35 private:
  36   ShenandoahMarkingContext* const _mark_context;
  37 public:
  38   inline ShenandoahForwardedIsAliveClosure();
  39   inline bool do_object_b(oop obj);
  40 };
  41 
  42 class ShenandoahIsAliveClosure: public BoolObjectClosure {
  43 private:
  44   ShenandoahMarkingContext* const _mark_context;
  45 public:
  46   inline ShenandoahIsAliveClosure();
  47   inline bool do_object_b(oop obj);
  48 };
  49 
  50 class ShenandoahIsAliveSelector : public StackObj {
  51 private:
  52   ShenandoahIsAliveClosure _alive_cl;
  53   ShenandoahForwardedIsAliveClosure _fwd_alive_cl;
  54 public:
  55   inline BoolObjectClosure* is_alive_closure();
  56 };
  57 
  58 class ShenandoahUpdateRefsClosure: public OopClosure {
  59 private:
  60   ShenandoahHeap* _heap;
  61 public:
  62   inline ShenandoahUpdateRefsClosure();
  63   inline void do_oop(oop* p);
  64   inline void do_oop(narrowOop* p);
  65 private:
  66   template <class T>
  67   inline void do_oop_work(T* p);
  68 };
  69 
  70 class ShenandoahTraversalUpdateRefsClosure: public OopClosure {
  71 private:
  72   ShenandoahHeap* const           _heap;
  73   ShenandoahHeapRegionSet* const  _traversal_set;
  74 
  75 public:
  76   inline ShenandoahTraversalUpdateRefsClosure();
  77   inline void do_oop(oop* p);
  78   inline void do_oop(narrowOop* p);
  79 private:
  80   template <class T>
  81   inline void do_oop_work(T* p);
  82 };
  83 
  84 class ShenandoahEvacuateUpdateRootsClosure: public BasicOopIterateClosure {
  85 private:
  86   ShenandoahHeap* _heap;
  87   Thread* _thread;
  88 public:
  89   inline ShenandoahEvacuateUpdateRootsClosure();
  90   inline void do_oop(oop* p);
  91   inline void do_oop(narrowOop* p);
  92 
  93 private:
  94   template <class T>
  95   inline void do_oop_work(T* p);
  96 };
  97 
  98 class ShenandoahEvacUpdateOopStorageRootsClosure : public BasicOopIterateClosure {
  99 private:
 100   ShenandoahHeap* _heap;
 101   Thread* _thread;
 102 public:
 103   inline ShenandoahEvacUpdateOopStorageRootsClosure();
 104   inline void do_oop(oop* p);
 105   inline void do_oop(narrowOop* p);
 106 };
 107 
 108 class ShenandoahCodeBlobAndDisarmClosure: public CodeBlobToOopClosure {
 109 private:
 110   BarrierSetNMethod* const _bs;
 111 
 112 public:
 113   inline ShenandoahCodeBlobAndDisarmClosure(OopClosure* cl);
 114   inline void do_code_blob(CodeBlob* cb);
 115 };
 116 
 117 #ifdef ASSERT
 118 class ShenandoahAssertNotForwardedClosure : public OopClosure {
 119 private:
 120   template <class T>
 121   inline void do_oop_work(T* p);
 122 
 123 public:
 124   inline void do_oop(narrowOop* p);
 125   inline void do_oop(oop* p);
 126 };
 127 #endif // ASSERT
 128 
 129 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP