Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/jfr/leakprofiler/chains/bitset.hpp@8e875c964f41 (annotated)
src/share/vm/jfr/leakprofiler/chains/bitset.hpp
Wed, 09 Oct 2019 16:11:58 +0800
- author
- ddong
- date
- Wed, 09 Oct 2019 16:11:58 +0800
- changeset 9885
- 8e875c964f41
- parent 9858
- b985cbb00e68
- permissions
- -rw-r--r--
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg
| apetushkov@9858 | 1 | /* |
| apetushkov@9858 | 2 | * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
| apetushkov@9858 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| apetushkov@9858 | 4 | * |
| apetushkov@9858 | 5 | * This code is free software; you can redistribute it and/or modify it |
| apetushkov@9858 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| apetushkov@9858 | 7 | * published by the Free Software Foundation. |
| apetushkov@9858 | 8 | * |
| apetushkov@9858 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| apetushkov@9858 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| apetushkov@9858 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| apetushkov@9858 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| apetushkov@9858 | 13 | * accompanied this code). |
| apetushkov@9858 | 14 | * |
| apetushkov@9858 | 15 | * You should have received a copy of the GNU General Public License version |
| apetushkov@9858 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| apetushkov@9858 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| apetushkov@9858 | 18 | * |
| apetushkov@9858 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| apetushkov@9858 | 20 | * or visit www.oracle.com if you need additional information or have any |
| apetushkov@9858 | 21 | * questions. |
| apetushkov@9858 | 22 | * |
| apetushkov@9858 | 23 | */ |
| apetushkov@9858 | 24 | |
| apetushkov@9858 | 25 | #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP |
| apetushkov@9858 | 26 | #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP |
| apetushkov@9858 | 27 | |
| apetushkov@9858 | 28 | #include "memory/allocation.hpp" |
| apetushkov@9858 | 29 | #include "oops/oopsHierarchy.hpp" |
| apetushkov@9858 | 30 | #include "utilities/bitMap.inline.hpp" |
| apetushkov@9858 | 31 | |
| apetushkov@9858 | 32 | class JfrVirtualMemory; |
| apetushkov@9858 | 33 | class MemRegion; |
| apetushkov@9858 | 34 | |
| apetushkov@9858 | 35 | class BitSet : public CHeapObj<mtTracing> { |
| apetushkov@9858 | 36 | private: |
| apetushkov@9858 | 37 | JfrVirtualMemory* _vmm; |
| apetushkov@9858 | 38 | const HeapWord* const _region_start; |
| apetushkov@9858 | 39 | BitMap _bits; |
| apetushkov@9858 | 40 | const size_t _region_size; |
| apetushkov@9858 | 41 | |
| apetushkov@9858 | 42 | public: |
| apetushkov@9858 | 43 | BitSet(const MemRegion& covered_region); |
| apetushkov@9858 | 44 | ~BitSet(); |
| apetushkov@9858 | 45 | |
| apetushkov@9858 | 46 | bool initialize(); |
| apetushkov@9858 | 47 | |
| apetushkov@9858 | 48 | BitMap::idx_t mark_obj(const HeapWord* addr) { |
| apetushkov@9858 | 49 | const BitMap::idx_t bit = addr_to_bit(addr); |
| ddong@9885 | 50 | _bits.set_bit(bit); |
| apetushkov@9858 | 51 | return bit; |
| apetushkov@9858 | 52 | } |
| apetushkov@9858 | 53 | |
| apetushkov@9858 | 54 | BitMap::idx_t mark_obj(oop obj) { |
| apetushkov@9858 | 55 | return mark_obj((HeapWord*)obj); |
| apetushkov@9858 | 56 | } |
| apetushkov@9858 | 57 | |
| apetushkov@9858 | 58 | bool is_marked(const HeapWord* addr) const { |
| apetushkov@9858 | 59 | return is_marked(addr_to_bit(addr)); |
| apetushkov@9858 | 60 | } |
| apetushkov@9858 | 61 | |
| apetushkov@9858 | 62 | bool is_marked(oop obj) const { |
| apetushkov@9858 | 63 | return is_marked((HeapWord*)obj); |
| apetushkov@9858 | 64 | } |
| apetushkov@9858 | 65 | |
| apetushkov@9858 | 66 | BitMap::idx_t size() const { |
| apetushkov@9858 | 67 | return _bits.size(); |
| apetushkov@9858 | 68 | } |
| apetushkov@9858 | 69 | |
| apetushkov@9858 | 70 | BitMap::idx_t addr_to_bit(const HeapWord* addr) const { |
| apetushkov@9858 | 71 | return pointer_delta(addr, _region_start) >> LogMinObjAlignment; |
| apetushkov@9858 | 72 | } |
| apetushkov@9858 | 73 | |
| apetushkov@9858 | 74 | bool is_marked(const BitMap::idx_t bit) const { |
| apetushkov@9858 | 75 | return _bits.at(bit); |
| apetushkov@9858 | 76 | } |
| apetushkov@9858 | 77 | }; |
| apetushkov@9858 | 78 | |
| apetushkov@9858 | 79 | #endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BITSET_HPP |
