src/hotspot/share/gc/g1/g1ConcurrentMarkBitMap.inline.hpp
author mgronlun
Wed, 30 Oct 2019 19:43:52 +0100
changeset 58863 c16ac7a2eba4
parent 53244 9807daeb47c4
permissions -rw-r--r--
8226511: Implement JFR Event Streaming Reviewed-by: egahlin, mseledtsov, mgronlun Contributed-by: erik.gahlin@oracle.com, mikhailo.seledtsov@oracle.com, markus.gronlund@oracle.com

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP
#define SHARE_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP

#include "gc/g1/g1ConcurrentMarkBitMap.hpp"
#include "gc/shared/markBitMap.inline.hpp"
#include "memory/memRegion.hpp"
#include "utilities/align.hpp"
#include "utilities/bitMap.inline.hpp"

inline bool G1CMBitMap::iterate(G1CMBitMapClosure* cl, MemRegion mr) {
  assert(!mr.is_empty(), "Does not support empty memregion to iterate over");
  assert(_covered.contains(mr),
         "Given MemRegion from " PTR_FORMAT " to " PTR_FORMAT " not contained in heap area",
         p2i(mr.start()), p2i(mr.end()));

  BitMap::idx_t const end_offset = addr_to_offset(mr.end());
  BitMap::idx_t offset = _bm.get_next_one_offset(addr_to_offset(mr.start()), end_offset);

  while (offset < end_offset) {
    HeapWord* const addr = offset_to_addr(offset);
    if (!cl->do_addr(addr)) {
      return false;
    }
    size_t const obj_size = (size_t)((oop)addr)->size();
    offset = _bm.get_next_one_offset(offset + (obj_size >> _shifter), end_offset);
  }
  return true;
}

#endif // SHARE_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP