Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCache.java @ 3945:8ed53447f690
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author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 6a991dcb52bb |
children | da91efe96a93 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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 | |
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34 // ConstantPoolCache : A constant pool cache (constantPoolCacheOopDesc). |
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35 // See cpCacheOop.hpp for details about this class. |
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36 // |
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37 public class ConstantPoolCache extends Oop { |
0 | 38 static { |
39 VM.registerVMInitializedObserver(new Observer() { | |
40 public void update(Observable o, Object data) { | |
41 initialize(VM.getVM().getTypeDataBase()); | |
42 } | |
43 }); | |
44 } | |
45 | |
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
47 Type type = db.lookupType("constantPoolCacheOopDesc"); | |
48 constants = new OopField(type.getOopField("_constant_pool"), 0); | |
49 baseOffset = type.getSize(); | |
50 Type elType = db.lookupType("ConstantPoolCacheEntry"); | |
51 elementSize = elType.getSize(); | |
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52 length = new CIntField(type.getCIntegerField("_length"), 0); |
0 | 53 } |
54 | |
55 ConstantPoolCache(OopHandle handle, ObjectHeap heap) { | |
56 super(handle, heap); | |
57 } | |
58 | |
59 public boolean isConstantPoolCache() { return true; } | |
60 | |
61 private static OopField constants; | |
62 | |
63 private static long baseOffset; | |
64 private static long elementSize; | |
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65 private static CIntField length; |
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66 |
0 | 67 |
68 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } | |
69 | |
70 public long getObjectSize() { | |
71 return alignObjectSize(baseOffset + getLength() * elementSize); | |
72 } | |
73 | |
74 public ConstantPoolCacheEntry getEntryAt(int i) { | |
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75 if (i < 0 || i >= getLength()) throw new IndexOutOfBoundsException(i + " " + getLength()); |
0 | 76 return new ConstantPoolCacheEntry(this, i); |
77 } | |
78 | |
1602 | 79 public static boolean isSecondaryIndex(int i) { return (i < 0); } |
80 public static int decodeSecondaryIndex(int i) { return isSecondaryIndex(i) ? ~i : i; } | |
81 public static int encodeSecondaryIndex(int i) { return !isSecondaryIndex(i) ? ~i : i; } | |
82 | |
83 // secondary entries hold invokedynamic call site bindings | |
84 public ConstantPoolCacheEntry getSecondaryEntryAt(int i) { | |
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85 int rawIndex = i; |
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86 if (isSecondaryIndex(i)) { |
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87 rawIndex = decodeSecondaryIndex(i); |
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88 } |
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89 ConstantPoolCacheEntry e = getEntryAt(rawIndex); |
1602 | 90 if (Assert.ASSERTS_ENABLED) { |
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91 Assert.that(e.isSecondaryEntry(), "must be a secondary entry:" + rawIndex); |
1602 | 92 } |
93 return e; | |
94 } | |
95 | |
96 public ConstantPoolCacheEntry getMainEntryAt(int i) { | |
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97 int primaryIndex = i; |
1602 | 98 if (isSecondaryIndex(i)) { |
99 // run through an extra level of indirection: | |
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100 int rawIndex = decodeSecondaryIndex(i); |
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101 primaryIndex = getEntryAt(rawIndex).getMainEntryIndex(); |
1602 | 102 } |
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103 ConstantPoolCacheEntry e = getEntryAt(primaryIndex); |
1602 | 104 if (Assert.ASSERTS_ENABLED) { |
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105 Assert.that(!e.isSecondaryEntry(), "must not be a secondary entry:" + primaryIndex); |
1602 | 106 } |
107 return e; | |
108 } | |
109 | |
0 | 110 public int getIntAt(int entry, int fld) { |
111 //alignObjectSize ? | |
112 long offset = baseOffset + /*alignObjectSize*/entry * elementSize + fld* getHeap().getIntSize(); | |
113 return (int) getHandle().getCIntegerAt(offset, getHeap().getIntSize(), true ); | |
114 } | |
115 | |
116 | |
117 public void printValueOn(PrintStream tty) { | |
118 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString()); | |
119 } | |
120 | |
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121 public int getLength() { |
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122 return (int) length.getValue(this); |
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123 } |
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124 |
0 | 125 public void iterateFields(OopVisitor visitor, boolean doVMFields) { |
126 super.iterateFields(visitor, doVMFields); | |
127 if (doVMFields) { | |
128 visitor.doOop(constants, true); | |
129 for (int i = 0; i < getLength(); i++) { | |
130 ConstantPoolCacheEntry entry = getEntryAt(i); | |
131 entry.iterateFields(visitor); | |
132 } | |
133 } | |
134 } | |
135 }; |