Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ObjArrayKlass.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 | c18cbe5936b8 |
| children | d8ce2825b193 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6964458: Reimplement class meta-data storage to use native memory
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2 * Copyright (c) 2000, 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.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 // ObjArrayKlass is the klass for ObjArrays | |
| 35 | |
| 36 public class ObjArrayKlass extends ArrayKlass { | |
| 37 static { | |
| 38 VM.registerVMInitializedObserver(new Observer() { | |
| 39 public void update(Observable o, Object data) { | |
| 40 initialize(VM.getVM().getTypeDataBase()); | |
| 41 } | |
| 42 }); | |
| 43 } | |
| 44 | |
| 45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 46 Type type = db.lookupType("objArrayKlass"); | |
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47 elementKlass = new MetadataField(type.getAddressField("_element_klass"), 0); |
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48 bottomKlass = new MetadataField(type.getAddressField("_bottom_klass"), 0); |
| 0 | 49 } |
| 50 | |
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6964458: Reimplement class meta-data storage to use native memory
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51 public ObjArrayKlass(Address addr) { |
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52 super(addr); |
| 0 | 53 } |
| 54 | |
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55 private static MetadataField elementKlass; |
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56 private static MetadataField bottomKlass; |
| 0 | 57 |
| 58 public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); } | |
| 59 public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); } | |
| 60 | |
| 61 public long computeModifierFlags() { | |
| 62 long elementFlags = getElementKlass().computeModifierFlags(); | |
| 63 long arrayFlags = 0L; | |
| 64 if ((elementFlags & (JVM_ACC_PUBLIC | JVM_ACC_PROTECTED)) != 0) { | |
| 65 // The array type is public if the component type is public or protected | |
| 66 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
| 67 } else { | |
| 68 // The array type is private if the component type is private | |
| 69 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL; | |
| 70 } | |
| 71 return arrayFlags; | |
| 72 } | |
| 73 | |
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74 public void iterateFields(MetadataVisitor visitor) { |
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75 super.iterateFields(visitor); |
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76 visitor.doMetadata(elementKlass, true); |
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77 visitor.doMetadata(bottomKlass, true); |
| 0 | 78 } |
| 79 | |
| 80 public Klass arrayKlassImpl(boolean orNull, int n) { | |
| 81 if (Assert.ASSERTS_ENABLED) { | |
| 82 Assert.that(getDimension() <= n, "check order of chain"); | |
| 83 } | |
| 84 int dimension = (int) getDimension(); | |
| 85 if (dimension == n) { | |
| 86 return this; | |
| 87 } | |
| 88 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension(); | |
| 89 if (ak == null) { | |
| 90 if (orNull) return null; | |
| 91 // FIXME: would need to change in reflective system to actually | |
| 92 // allocate klass | |
| 93 throw new RuntimeException("Can not allocate array klasses in debugging system"); | |
| 94 } | |
| 95 | |
| 96 if (orNull) { | |
| 97 return ak.arrayKlassOrNull(n); | |
| 98 } | |
| 99 return ak.arrayKlass(n); | |
| 100 } | |
| 101 | |
| 102 public Klass arrayKlassImpl(boolean orNull) { | |
| 103 return arrayKlassImpl(orNull, (int) (getDimension() + 1)); | |
| 104 } | |
| 105 | |
| 106 public void printValueOn(PrintStream tty) { | |
| 107 tty.print("ObjArrayKlass for "); | |
| 108 getElementKlass().printValueOn(tty); | |
| 109 } | |
| 110 }; |