| /* |
| * 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. |
| * |
| */ |
| #include "precompiled.hpp" |
| #include "jfr/leakprofiler/chains/bitset.hpp" |
| #include "jfr/recorder/storage/jfrVirtualMemory.hpp" |
| #include "memory/memRegion.hpp" |
| |
| BitSet::BitSet(const MemRegion& covered_region) : |
| _vmm(NULL), |
| _region_start(covered_region.start()), |
| _region_size(covered_region.word_size()) { |
| } |
| |
| BitSet::~BitSet() { |
| delete _vmm; |
| } |
| |
| bool BitSet::initialize() { |
| assert(_vmm == NULL, "invariant"); |
| _vmm = new JfrVirtualMemory(); |
| if (_vmm == NULL) { |
| return false; |
| } |
| |
| const BitMap::idx_t bits = _region_size >> LogMinObjAlignment; |
| const size_t words = bits / BitsPerWord; |
| const size_t raw_bytes = words * sizeof(BitMap::idx_t); |
| |
| // the virtual memory invocation will reserve and commit the entire space |
| BitMap::bm_word_t* map = (BitMap::bm_word_t*)_vmm->initialize(raw_bytes, raw_bytes); |
| if (map == NULL) { |
| return false; |
| } |
| _bits = BitMapView(map, bits); |
| return true; |
| } |
| |