Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Field.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 | f6f3bb0ee072 |
| children | bd7a7ce2e264 |
| 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 | |
| 29 import sun.jvm.hotspot.runtime.*; | |
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30 import sun.jvm.hotspot.utilities.*; |
| 0 | 31 |
| 32 // Super class for all fields in an object | |
| 33 public class Field { | |
| 34 | |
| 35 Field(FieldIdentifier id, long offset, boolean isVMField) { | |
| 36 this.offset = offset; | |
| 37 this.id = id; | |
| 38 this.isVMField = isVMField; | |
| 39 } | |
| 40 | |
| 41 /** Constructor for fields that are named in an InstanceKlass's | |
| 42 fields array (i.e., named, non-VM fields) */ | |
| 3938 | 43 Field(InstanceKlass holder, int fieldIndex) { |
| 0 | 44 this.holder = holder; |
| 3938 | 45 this.fieldIndex = fieldIndex; |
| 46 | |
| 47 offset = holder.getFieldOffset(fieldIndex); | |
| 48 genericSignature = holder.getFieldGenericSignature(fieldIndex); | |
| 0 | 49 |
| 3938 | 50 Symbol name = holder.getFieldName(fieldIndex); |
| 0 | 51 id = new NamedFieldIdentifier(name.asString()); |
| 52 | |
| 3938 | 53 signature = holder.getFieldSignature(fieldIndex); |
| 0 | 54 fieldType = new FieldType(signature); |
| 3938 | 55 |
| 56 short access = holder.getFieldAccessFlags(fieldIndex); | |
| 0 | 57 accessFlags = new AccessFlags(access); |
| 58 } | |
| 59 | |
| 60 private long offset; | |
| 61 private FieldIdentifier id; | |
| 62 private boolean isVMField; | |
| 63 // Java fields only | |
| 64 private InstanceKlass holder; | |
| 65 private FieldType fieldType; | |
| 66 private Symbol signature; | |
| 67 private Symbol genericSignature; | |
| 68 private AccessFlags accessFlags; | |
| 3938 | 69 private int fieldIndex; |
| 0 | 70 |
| 71 /** Returns the byte offset of the field within the object or klass */ | |
| 72 public long getOffset() { return offset; } | |
| 73 | |
| 74 /** Returns the identifier of the field */ | |
| 75 public FieldIdentifier getID() { return id; } | |
| 76 | |
| 77 /** Indicates whether this is a VM field */ | |
| 78 public boolean isVMField() { return isVMField; } | |
| 79 | |
| 80 /** Indicates whether this is a named field */ | |
| 81 public boolean isNamedField() { return (id instanceof NamedFieldIdentifier); } | |
| 82 | |
| 83 public void printOn(PrintStream tty) { | |
| 84 getID().printOn(tty); | |
| 85 tty.print(" {" + getOffset() + "} :"); | |
| 86 } | |
| 87 | |
| 88 /** (Named, non-VM fields only) Returns the InstanceKlass containing | |
| 89 this (static or non-static) field. */ | |
| 90 public InstanceKlass getFieldHolder() { | |
| 91 return holder; | |
| 92 } | |
| 93 | |
| 94 /** (Named, non-VM fields only) Returns the index in the fields | |
| 95 TypeArray for this field. Equivalent to the "index" in the VM's | |
| 96 fieldDescriptors. */ | |
| 3938 | 97 public int getFieldIndex() { |
| 98 return fieldIndex; | |
| 0 | 99 } |
| 100 | |
| 101 /** (Named, non-VM fields only) Retrieves the access flags. */ | |
| 102 public long getAccessFlags() { return accessFlags.getValue(); } | |
| 103 public AccessFlags getAccessFlagsObj() { return accessFlags; } | |
| 104 | |
| 105 /** (Named, non-VM fields only) Returns the type of this field. */ | |
| 106 public FieldType getFieldType() { return fieldType; } | |
| 107 | |
| 108 /** (Named, non-VM fields only) Returns the signature of this | |
| 109 field. */ | |
| 110 public Symbol getSignature() { return signature; } | |
| 111 public Symbol getGenericSignature() { return genericSignature; } | |
| 112 | |
| 113 // | |
| 114 // Following acccessors are for named, non-VM fields only | |
| 115 // | |
| 116 public boolean isPublic() { return accessFlags.isPublic(); } | |
| 117 public boolean isPrivate() { return accessFlags.isPrivate(); } | |
| 118 public boolean isProtected() { return accessFlags.isProtected(); } | |
| 119 public boolean isPackagePrivate() { return !isPublic() && !isPrivate() && !isProtected(); } | |
| 120 | |
| 121 public boolean isStatic() { return accessFlags.isStatic(); } | |
| 122 public boolean isFinal() { return accessFlags.isFinal(); } | |
| 123 public boolean isVolatile() { return accessFlags.isVolatile(); } | |
| 124 public boolean isTransient() { return accessFlags.isTransient(); } | |
| 125 | |
| 126 public boolean isSynthetic() { return accessFlags.isSynthetic(); } | |
| 127 public boolean isEnumConstant() { return accessFlags.isEnum(); } | |
| 128 | |
| 129 public boolean equals(Object obj) { | |
| 130 if (obj == null) { | |
| 131 return false; | |
| 132 } | |
| 133 | |
| 134 if (! (obj instanceof Field)) { | |
| 135 return false; | |
| 136 } | |
| 137 | |
| 138 Field other = (Field) obj; | |
| 139 return this.getFieldHolder().equals(other.getFieldHolder()) && | |
| 140 this.getID().equals(other.getID()); | |
| 141 } | |
| 142 | |
| 143 public int hashCode() { | |
| 144 return getFieldHolder().hashCode() ^ getID().hashCode(); | |
| 145 } | |
| 146 } |