src/hotspot/share/gc/g1/g1ConcurrentMarkBitMap.inline.hpp
author rkennke
Wed, 29 Aug 2018 20:15:09 +0200
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child 53244 9807daeb47c4
permissions -rw-r--r--
8180193: Make marking bitmap code available to other GCs Reviewed-by: shade, stefank
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/*
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 * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP
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#define SHARE_VM_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP
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#include "gc/g1/g1ConcurrentMarkBitMap.hpp"
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#include "gc/shared/markBitMap.inline.hpp"
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#include "memory/memRegion.hpp"
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#include "utilities/align.hpp"
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#include "utilities/bitMap.inline.hpp"
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inline bool G1CMBitMap::iterate(G1CMBitMapClosure* cl, MemRegion mr) {
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  assert(!mr.is_empty(), "Does not support empty memregion to iterate over");
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  assert(_covered.contains(mr),
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         "Given MemRegion from " PTR_FORMAT " to " PTR_FORMAT " not contained in heap area",
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         p2i(mr.start()), p2i(mr.end()));
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  BitMap::idx_t const end_offset = addr_to_offset(mr.end());
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  BitMap::idx_t offset = _bm.get_next_one_offset(addr_to_offset(mr.start()), end_offset);
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  while (offset < end_offset) {
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    HeapWord* const addr = offset_to_addr(offset);
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    if (!cl->do_addr(addr)) {
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      return false;
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    }
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    size_t const obj_size = (size_t)((oop)addr)->size();
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    offset = _bm.get_next_one_offset(offset + (obj_size >> _shifter), end_offset);
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  }
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  return true;
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}
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#endif // SHARE_VM_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP