Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/TypeArrayKlass.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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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 // TypeArrayKlass is a proxy for typeArrayKlass in the JVM | |
| 35 | |
| 36 public class TypeArrayKlass 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 t = db.lookupType("typeArrayKlass"); | |
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47 maxLength = new CIntField(t.getCIntegerField("_max_length"), 0); |
| 0 | 48 } |
| 49 | |
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50 public TypeArrayKlass(Address addr) { |
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51 super(addr); |
| 0 | 52 } |
| 53 | |
| 54 private static CIntField maxLength; | |
| 55 | |
| 56 public long getMaxLength() { return maxLength.getValue(this); } | |
| 57 | |
| 58 public static final int T_BOOLEAN = 4; | |
| 59 public static final int T_CHAR = 5; | |
| 60 public static final int T_FLOAT = 6; | |
| 61 public static final int T_DOUBLE = 7; | |
| 62 public static final int T_BYTE = 8; | |
| 63 public static final int T_SHORT = 9; | |
| 64 public static final int T_INT = 10; | |
| 65 public static final int T_LONG = 11; | |
| 66 | |
| 67 public String getTypeName() { | |
| 68 switch ((int) getElementType()) { | |
| 69 case T_BOOLEAN: return "[Z"; | |
| 70 case T_CHAR: return "[C"; | |
| 71 case T_FLOAT: return "[F"; | |
| 72 case T_DOUBLE: return "[D"; | |
| 73 case T_BYTE: return "[B"; | |
| 74 case T_SHORT: return "[S"; | |
| 75 case T_INT: return "[I"; | |
| 76 case T_LONG: return "[J"; | |
| 77 } | |
| 78 return "Unknown TypeArray"; | |
| 79 } | |
| 80 | |
| 81 public String getElementTypeName() { | |
| 82 switch ((int) getElementType()) { | |
| 83 case T_BOOLEAN: return "boolean"; | |
| 84 case T_CHAR: return "char"; | |
| 85 case T_FLOAT: return "float"; | |
| 86 case T_DOUBLE: return "double"; | |
| 87 case T_BYTE: return "byte"; | |
| 88 case T_SHORT: return "short"; | |
| 89 case T_INT: return "int"; | |
| 90 case T_LONG: return "long"; | |
| 91 } | |
| 92 throw new RuntimeException("should not reach here"); | |
| 93 } | |
| 94 | |
| 95 public void printValueOn(PrintStream tty) { | |
| 96 tty.print("TypeArrayKlass for " + getTypeName()); | |
| 97 } | |
| 98 | |
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6964458: Reimplement class meta-data storage to use native memory
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99 public void iterateFields(MetadataVisitor visitor) { |
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100 super.iterateFields(visitor); |
| 0 | 101 visitor.doCInt(maxLength, true); |
| 102 } | |
| 103 | |
| 104 public Klass arrayKlassImpl(boolean orNull, int n) { | |
| 105 int dimension = (int) getDimension(); | |
| 106 if (Assert.ASSERTS_ENABLED) { | |
| 107 Assert.that(dimension <= n, "check order of chain"); | |
| 108 } | |
| 109 if (dimension == n) | |
| 110 return this; | |
| 111 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension(); | |
| 112 if (ak == null) { | |
| 113 if (orNull) return null; | |
| 114 // FIXME: would need to change in reflective system to actually | |
| 115 // allocate klass | |
| 116 throw new RuntimeException("Can not allocate array klasses in debugging system"); | |
| 117 } | |
| 118 if (orNull) { | |
| 119 return ak.arrayKlassOrNull(n); | |
| 120 } | |
| 121 return ak.arrayKlass(n); | |
| 122 } | |
| 123 | |
| 124 public Klass arrayKlassImpl(boolean orNull) { | |
| 125 return arrayKlassImpl(orNull, (int) (getDimension() + 1)); | |
| 126 } | |
| 127 } |