1 /*
   2  * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZOOPCLOSURES_HPP
  25 #define SHARE_GC_Z_ZOOPCLOSURES_HPP
  26 
  27 #include "memory/iterator.hpp"
  28 #include "gc/z/zRootsIterator.hpp"
  29 
  30 class ZLoadBarrierOopClosure : public BasicOopIterateClosure {
  31 public:
  32   virtual void do_oop(oop* p);
  33   virtual void do_oop(narrowOop* p);
  34 
  35 #ifdef ASSERT
  36   virtual bool should_verify_oops() {
  37     return false;
  38   }
  39 #endif
  40 };
  41 
  42 template <bool finalizable>
  43 class ZMarkBarrierOopClosure : public BasicOopIterateClosure {
  44 public:
  45   ZMarkBarrierOopClosure();
  46 
  47   virtual void do_oop(oop* p);
  48   virtual void do_oop(narrowOop* p);
  49 
  50 #ifdef ASSERT
  51   virtual bool should_verify_oops() {
  52     return false;
  53   }
  54 #endif
  55 };
  56 
  57 class ZPhantomIsAliveObjectClosure : public BoolObjectClosure {
  58 public:
  59   virtual bool do_object_b(oop o);
  60 };
  61 
  62 class ZPhantomKeepAliveOopClosure : public ZRootsIteratorClosure {
  63 public:
  64   virtual void do_oop(oop* p);
  65   virtual void do_oop(narrowOop* p);
  66 };
  67 
  68 class ZPhantomCleanOopClosure : public ZRootsIteratorClosure {
  69 public:
  70   virtual void do_oop(oop* p);
  71   virtual void do_oop(narrowOop* p);
  72 };
  73 
  74 class ZVerifyOopClosure : public ZRootsIteratorClosure, public BasicOopIterateClosure {
  75 public:
  76   virtual void do_oop(oop* p);
  77   virtual void do_oop(narrowOop* p);
  78 
  79   virtual ReferenceIterationMode reference_iteration_mode() {
  80     return DO_FIELDS;
  81   }
  82 
  83 #ifdef ASSERT
  84   // Verification handled by the closure itself
  85   virtual bool should_verify_oops() {
  86     return false;
  87   }
  88 #endif
  89 };
  90 
  91 class ZVerifyObjectClosure : public ObjectClosure {
  92 public:
  93   virtual void do_object(oop o);
  94 };
  95 
  96 #endif // SHARE_GC_Z_ZOOPCLOSURES_HPP