1 /* 2 * Copyright (c) 2017, 2019, 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_ZHEAPITERATOR_HPP 25 #define SHARE_GC_Z_ZHEAPITERATOR_HPP 26 27 #include "gc/z/zGranuleMap.hpp" 28 #include "memory/allocation.hpp" 29 #include "utilities/stack.hpp" 30 31 class ObjectClosure; 32 class ZHeapIteratorBitMap; 33 34 class ZHeapIterator : public StackObj { 35 template<bool Concurrent, bool Weak> friend class ZHeapIteratorRootOopClosure; 36 template<bool VisitReferents> friend class ZHeapIteratorOopClosure; 37 38 private: 39 typedef ZGranuleMap<ZHeapIteratorBitMap*> ZVisitMap; 40 typedef ZGranuleMapIterator<ZHeapIteratorBitMap*> ZVisitMapIterator; 41 typedef Stack<oop, mtGC> ZVisitStack; 42 43 ZVisitStack _visit_stack; 44 ZVisitMap _visit_map; 45 46 ZHeapIteratorBitMap* object_map(oop obj); 47 void push(oop obj); 48 49 template <typename RootsIterator, bool Concurrent, bool Weak> void push_roots(); 50 template <bool VisitReferents> void push_fields(oop obj); 51 template <bool VisitReferents> void objects_do(ObjectClosure* cl); 52 53 public: 54 ZHeapIterator(); 55 ~ZHeapIterator(); 56 57 void objects_do(ObjectClosure* cl, bool visit_referents); 58 }; 59 60 #endif // SHARE_GC_Z_ZHEAPITERATOR_HPP