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comparison src/share/vm/gc_implementation/concurrentMarkSweep/promotionInfo.cpp @ 1546:a00b51b2dda4

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6948539: CMS+UseCompressedOops: placement of cms_free bit interferes with promoted object link Summary: When using compressed oops, use compressed promoted pointers in b63:b31 of the mark word, so as not to interfere with the CMS "freeness bit" at b7. Updated mark-word layout documentation. Reviewed-by: minqi, poonam, jmasa, coleenp
author ysr
date Mon, 17 May 2010 00:47:28 -0700
parents a8127dc669ba
children c18cbe5936b8
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1545:cc387008223e 1546:a00b51b2dda4
1 /* 1 /*
2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 2010 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.