view src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp @ 2981:2ace1c4ee8da

6888336: G1: avoid explicitly marking and pushing objects in survivor spaces Summary: This change simplifies the interaction between GC and concurrent marking. By disabling survivor spaces during the initial-mark pause we don't need to propagate marks of objects we copy during each GC (since we never need to copy an explicitly marked object). Reviewed-by: johnc, brutisso
author tonyp
date Tue, 10 Jan 2012 18:58:13 -0500
parents f95d63e2154a
children 720b6a76dd9d
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 * 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.
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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).
 * 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.
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#include "gc_implementation/g1/heapRegion.hpp"
#include "gc_implementation/g1/heapRegionSeq.hpp"

inline size_t HeapRegionSeq::addr_to_index_biased(HeapWord* addr) const {
  assert(_heap_bottom <= addr && addr < _heap_end,
         err_msg("addr: "PTR_FORMAT" bottom: "PTR_FORMAT" end: "PTR_FORMAT,
                 addr, _heap_bottom, _heap_end));
  size_t index = (size_t) addr >> _region_shift;
  return index;

inline HeapRegion* HeapRegionSeq::addr_to_region_unsafe(HeapWord* addr) const {
  assert(_heap_bottom <= addr && addr < _heap_end,
         err_msg("addr: "PTR_FORMAT" bottom: "PTR_FORMAT" end: "PTR_FORMAT,
                 addr, _heap_bottom, _heap_end));
  size_t index_biased = addr_to_index_biased(addr);
  HeapRegion* hr = _regions_biased[index_biased];
  assert(hr != NULL, "invariant");
  return hr;

inline HeapRegion* HeapRegionSeq::addr_to_region(HeapWord* addr) const {
  if (addr != NULL && addr < _heap_end) {
    assert(addr >= _heap_bottom,
          err_msg("addr: "PTR_FORMAT" bottom: "PTR_FORMAT, addr, _heap_bottom));
    return addr_to_region_unsafe(addr);
  return NULL;

inline HeapRegion* HeapRegionSeq::at(size_t index) const {
  assert(index < length(), "pre-condition");
  HeapRegion* hr = _regions[index];
  assert(hr != NULL, "sanity");
  assert(hr->hrs_index() == index, "sanity");
  return hr;