Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCacheEntry.java @ 6725:da91efe96a93
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 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 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 | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.oops; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.runtime.*; | |
| 30 import sun.jvm.hotspot.types.*; | |
| 1602 | 31 import sun.jvm.hotspot.utilities.*; |
| 0 | 32 |
| 33 public class ConstantPoolCacheEntry { | |
| 34 private static long size; | |
| 35 private static long baseOffset; | |
| 36 private static CIntegerField indices; | |
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37 private static AddressField f1; |
| 0 | 38 private static CIntegerField f2; |
| 39 private static CIntegerField flags; | |
| 40 | |
| 41 private ConstantPoolCache cp; | |
| 42 private long offset; | |
| 43 | |
| 44 static { | |
| 45 VM.registerVMInitializedObserver(new Observer() { | |
| 46 public void update(Observable o, Object data) { | |
| 47 initialize(VM.getVM().getTypeDataBase()); | |
| 48 } | |
| 49 }); | |
| 50 } | |
| 51 | |
| 52 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 53 Type type = db.lookupType("ConstantPoolCacheEntry"); | |
| 54 size = type.getSize(); | |
| 55 | |
| 56 indices = type.getCIntegerField("_indices"); | |
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57 f1 = type.getAddressField ("_f1"); |
| 0 | 58 f2 = type.getCIntegerField("_f2"); |
| 59 flags = type.getCIntegerField("_flags"); | |
| 60 | |
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61 type = db.lookupType("ConstantPoolCache"); |
| 0 | 62 baseOffset = type.getSize(); |
| 63 } | |
| 64 | |
| 65 ConstantPoolCacheEntry(ConstantPoolCache cp, int index) { | |
| 66 this.cp = cp; | |
| 67 offset = baseOffset + index * size; | |
| 68 } | |
| 69 | |
| 70 public int getConstantPoolIndex() { | |
| 1602 | 71 if (Assert.ASSERTS_ENABLED) { |
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72 Assert.that((getIndices() & 0xFFFF) != 0, "must be main entry"); |
| 1602 | 73 } |
| 0 | 74 return (int) (getIndices() & 0xFFFF); |
| 75 } | |
| 76 | |
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77 private long getIndices() { |
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78 return cp.getAddress().getCIntegerAt(indices.getOffset() + offset, indices.getSize(), indices.isUnsigned()); |
| 1602 | 79 } |
| 80 | |
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81 public Metadata getF1() { |
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82 return Metadata.instantiateWrapperFor(cp.getAddress().getAddressAt(f1.getOffset() + offset)); |
| 0 | 83 } |
| 84 | |
| 85 public int getF2() { | |
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86 return cp.getAddress().getJIntAt(f1.getOffset() + offset); |
| 0 | 87 } |
| 88 | |
| 89 public int getFlags() { | |
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90 return cp.getAddress().getJIntAt(flags.getOffset() + offset); |
| 0 | 91 } |
| 92 | |
| 93 static NamedFieldIdentifier f1FieldName = new NamedFieldIdentifier("_f1"); | |
| 94 static NamedFieldIdentifier f2FieldName = new NamedFieldIdentifier("_f2"); | |
| 95 static NamedFieldIdentifier flagsFieldName = new NamedFieldIdentifier("_flags"); | |
| 96 | |
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97 public void iterateFields(MetadataVisitor visitor) { |
| 0 | 98 visitor.doOop(new OopField(f1FieldName, f1.getOffset() + offset, true), true); |
| 99 visitor.doInt(new IntField(f2FieldName, f2.getOffset() + offset, true), true); | |
| 100 visitor.doInt(new IntField(flagsFieldName, flags.getOffset() + offset, true), true); | |
| 101 } | |
| 102 } |