apetushkov@9858: /*
apetushkov@9858:  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
apetushkov@9858:  *
apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP
apetushkov@9858: #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP
apetushkov@9858: 
apetushkov@9858: #include "memory/allocation.hpp"
apetushkov@9858: #include "oops/oopsHierarchy.hpp"
apetushkov@9858: #include "utilities/bitMap.inline.hpp"
apetushkov@9858: 
apetushkov@9858: class JfrVirtualMemory;
apetushkov@9858: class MemRegion;
apetushkov@9858: 
apetushkov@9858: class BitSet : public CHeapObj<mtTracing> {
apetushkov@9858:  private:
apetushkov@9858:   JfrVirtualMemory* _vmm;
apetushkov@9858:   const HeapWord* const _region_start;
apetushkov@9858:   BitMap _bits;
apetushkov@9858:   const size_t _region_size;
apetushkov@9858: 
apetushkov@9858:  public:
apetushkov@9858:   BitSet(const MemRegion& covered_region);
apetushkov@9858:   ~BitSet();
apetushkov@9858: 
apetushkov@9858:   bool initialize();
apetushkov@9858: 
apetushkov@9858:   BitMap::idx_t mark_obj(const HeapWord* addr) {
apetushkov@9858:     const BitMap::idx_t bit = addr_to_bit(addr);
ddong@9885:     _bits.set_bit(bit);
apetushkov@9858:     return bit;
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   BitMap::idx_t mark_obj(oop obj) {
apetushkov@9858:     return mark_obj((HeapWord*)obj);
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   bool is_marked(const HeapWord* addr) const {
apetushkov@9858:     return is_marked(addr_to_bit(addr));
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   bool is_marked(oop obj) const {
apetushkov@9858:     return is_marked((HeapWord*)obj);
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   BitMap::idx_t size() const {
apetushkov@9858:     return _bits.size();
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   BitMap::idx_t addr_to_bit(const HeapWord* addr) const {
apetushkov@9858:     return pointer_delta(addr, _region_start) >> LogMinObjAlignment;
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   bool is_marked(const BitMap::idx_t bit) const {
apetushkov@9858:     return _bits.at(bit);
apetushkov@9858:   }
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: #endif  // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP