src/share/vm/jfr/leakprofiler/chains/bitset.hpp

changeset 9858
b985cbb00e68
child 9885
8e875c964f41
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/jfr/leakprofiler/chains/bitset.hpp	Mon Aug 12 18:30:40 2019 +0300
     1.3 @@ -0,0 +1,79 @@
     1.4 +/*
     1.5 + * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +#ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP
    1.29 +#define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP
    1.30 +
    1.31 +#include "memory/allocation.hpp"
    1.32 +#include "oops/oopsHierarchy.hpp"
    1.33 +#include "utilities/bitMap.inline.hpp"
    1.34 +
    1.35 +class JfrVirtualMemory;
    1.36 +class MemRegion;
    1.37 +
    1.38 +class BitSet : public CHeapObj<mtTracing> {
    1.39 + private:
    1.40 +  JfrVirtualMemory* _vmm;
    1.41 +  const HeapWord* const _region_start;
    1.42 +  BitMap _bits;
    1.43 +  const size_t _region_size;
    1.44 +
    1.45 + public:
    1.46 +  BitSet(const MemRegion& covered_region);
    1.47 +  ~BitSet();
    1.48 +
    1.49 +  bool initialize();
    1.50 +
    1.51 +  BitMap::idx_t mark_obj(const HeapWord* addr) {
    1.52 +    const BitMap::idx_t bit = addr_to_bit(addr);
    1.53 +    _bits.par_set_bit(bit);
    1.54 +    return bit;
    1.55 +  }
    1.56 +
    1.57 +  BitMap::idx_t mark_obj(oop obj) {
    1.58 +    return mark_obj((HeapWord*)obj);
    1.59 +  }
    1.60 +
    1.61 +  bool is_marked(const HeapWord* addr) const {
    1.62 +    return is_marked(addr_to_bit(addr));
    1.63 +  }
    1.64 +
    1.65 +  bool is_marked(oop obj) const {
    1.66 +    return is_marked((HeapWord*)obj);
    1.67 +  }
    1.68 +
    1.69 +  BitMap::idx_t size() const {
    1.70 +    return _bits.size();
    1.71 +  }
    1.72 +
    1.73 +  BitMap::idx_t addr_to_bit(const HeapWord* addr) const {
    1.74 +    return pointer_delta(addr, _region_start) >> LogMinObjAlignment;
    1.75 +  }
    1.76 +
    1.77 +  bool is_marked(const BitMap::idx_t bit) const {
    1.78 +    return _bits.at(bit);
    1.79 +  }
    1.80 +};
    1.81 +
    1.82 +#endif  // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP

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