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comparison agent/src/share/classes/sun/jvm/hotspot/memory/CompactibleFreeListSpace.java @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 0a8e0d4345b3
children 6cf2530f7fd3
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. 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.
166 Address regionStart = cur; 166 Address regionStart = cur;
167 Address limit = end(); 167 Address limit = end();
168 final long addressSize = vm.getAddressSize(); 168 final long addressSize = vm.getAddressSize();
169 169
170 for (; cur.lessThan(limit);) { 170 for (; cur.lessThan(limit);) {
171 Address klassOop = cur.getAddressAt(addressSize); 171 Address k = cur.getAddressAt(addressSize);
172 if (FreeChunk.indicatesFreeChunk(cur)) { 172 if (FreeChunk.indicatesFreeChunk(cur)) {
173 if (! cur.equals(regionStart)) { 173 if (! cur.equals(regionStart)) {
174 res.add(new MemRegion(regionStart, cur)); 174 res.add(new MemRegion(regionStart, cur));
175 } 175 }
176 FreeChunk fc = (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, cur); 176 FreeChunk fc = (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, cur);
179 Assert.that(chunkSize > 0, "invalid FreeChunk size"); 179 Assert.that(chunkSize > 0, "invalid FreeChunk size");
180 } 180 }
181 // note that fc.size() gives chunk size in heap words 181 // note that fc.size() gives chunk size in heap words
182 cur = cur.addOffsetTo(chunkSize * addressSize); 182 cur = cur.addOffsetTo(chunkSize * addressSize);
183 regionStart = cur; 183 regionStart = cur;
184 } else if (klassOop != null) { 184 } else if (k != null) {
185 Oop obj = heap.newOop(cur.addOffsetToAsOopHandle(0)); 185 Oop obj = heap.newOop(cur.addOffsetToAsOopHandle(0));
186 long objectSize = obj.getObjectSize(); 186 long objectSize = obj.getObjectSize();
187 cur = cur.addOffsetTo(adjustObjectSizeInBytes(objectSize)); 187 cur = cur.addOffsetTo(adjustObjectSizeInBytes(objectSize));
188 } else { 188 } else {
189 // FIXME: need to do a better job here. 189 // FIXME: need to do a better job here.