Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/shared/liveRange.hpp @ 266:2214b226b7f0
6724367: par compact could clear less young gen summary data
Reviewed-by: jmasa, apetrusenko
author | jcoomes |
---|---|
date | Fri, 11 Jul 2008 16:11:50 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * 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. * * This code is distributed in the hope that it will be useful, but WITHOUT * 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. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // This is a shared helper class used during phase 3 and 4 to move all the objects // Dead regions in a Space are linked together to keep track of the live regions // so that the live data can be traversed quickly without having to look at each // object. class LiveRange: public MemRegion { public: LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {} void set_end(HeapWord* e) { assert(e >= start(), "should be a non-zero range"); MemRegion::set_end(e); } void set_word_size(size_t ws) { assert(ws >= 0, "should be a non-zero range"); MemRegion::set_word_size(ws); } LiveRange * next() { return (LiveRange *) end(); } void move_to(HeapWord* destination) { Copy::aligned_conjoint_words(start(), destination, word_size()); } };