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