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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | /* | ||
| 28 | * The Original Code is HAT. The Initial Developer of the | ||
| 29 | * Original Code is Bill Foote, with contributions from others | ||
| 30 | * at JavaSoft/Sun. | ||
| 31 | */ | ||
| 32 | |||
| 33 | package com.sun.tools.hat.internal.model; | ||
| 34 | |||
| 35 | import java.io.IOException; | ||
| 36 | import com.sun.tools.hat.internal.parser.ReadBuffer; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * @author Bill Foote | ||
| 40 | */ | ||
| 41 | public class JavaObjectArray extends JavaLazyReadObject { | ||
| 42 | |||
| 43 | private Object clazz; // Long before resolve, the class after resolve | ||
| 44 | |||
| 45 | public JavaObjectArray(long classID, long offset) { | ||
| 46 | super(offset); | ||
| 47 | this.clazz = makeId(classID); | ||
| 48 | } | ||
| 49 | |||
| 50 | public JavaClass getClazz() { | ||
| 51 | return (JavaClass) clazz; | ||
| 52 | } | ||
| 53 | |||
| 54 | public void resolve(Snapshot snapshot) { | ||
| 55 | if (clazz instanceof JavaClass) { | ||
| 56 | return; | ||
| 57 | } | ||
| 58 | long classID = getIdValue((Number)clazz); | ||
| 59 | if (snapshot.isNewStyleArrayClass()) { | ||
| 60 | // Modern heap dumps do this | ||
| 61 | JavaThing t = snapshot.findThing(classID); | ||
| 62 | if (t instanceof JavaClass) { | ||
| 63 | clazz = (JavaClass) t; | ||
| 64 | } | ||
| 65 | } | ||
| 66 | if (!(clazz instanceof JavaClass)) { | ||
| 67 | JavaThing t = snapshot.findThing(classID); | ||
| 68 | if (t != null && t instanceof JavaClass) { | ||
| 69 | JavaClass el = (JavaClass) t; | ||
| 70 | String nm = el.getName(); | ||
| 71 | if (!nm.startsWith("[")) { | ||
| 72 | nm = "L" + el.getName() + ";"; | ||
| 73 | } | ||
| 74 | clazz = snapshot.getArrayClass(nm); | ||
| 75 | } | ||
| 76 | } | ||
| 77 | |||
| 78 | if (!(clazz instanceof JavaClass)) { | ||
| 79 | clazz = snapshot.getOtherArrayType(); | ||
| 80 | } | ||
| 81 | ((JavaClass)clazz).addInstance(this); | ||
| 82 | super.resolve(snapshot); | ||
| 83 | } | ||
| 84 | |||
| 85 | public JavaThing[] getValues() { | ||
| 86 | return getElements(); | ||
| 87 | } | ||
| 88 | |||
| 89 | public JavaThing[] getElements() { | ||
| 90 | Snapshot snapshot = getClazz().getSnapshot(); | ||
| 91 | byte[] data = getValue(); | ||
| 92 | final int idSize = snapshot.getIdentifierSize(); | ||
| 93 | final int numElements = data.length / idSize; | ||
| 94 | JavaThing[] elements = new JavaThing[numElements]; | ||
| 95 | int index = 0; | ||
| 96 | for (int i = 0; i < elements.length; i++) { | ||
| 97 | long id = objectIdAt(index, data); | ||
| 98 | index += idSize; | ||
| 99 | elements[i] = snapshot.findThing(id); | ||
| 100 | } | ||
| 101 | return elements; | ||
| 102 | } | ||
| 103 | |||
| 104 | public int compareTo(JavaThing other) { | ||
| 105 | if (other instanceof JavaObjectArray) { | ||
| 106 | return 0; | ||
| 107 | } | ||
| 108 | return super.compareTo(other); | ||
| 109 | } | ||
| 110 | |||
| 111 | public int getLength() { | ||
| 112 | return getValueLength() / getClazz().getIdentifierSize(); | ||
| 113 | } | ||
| 114 | |||
| 115 | public void visitReferencedObjects(JavaHeapObjectVisitor v) { | ||
| 116 | super.visitReferencedObjects(v); | ||
| 117 | JavaThing[] elements = getElements(); | ||
| 118 | for (int i = 0; i < elements.length; i++) { | ||
| 119 | if (elements[i] != null && elements[i] instanceof JavaHeapObject) { | ||
| 120 | v.visit((JavaHeapObject) elements[i]); | ||
| 121 | } | ||
| 122 | } | ||
| 123 | } | ||
| 124 | |||
| 125 | /** | ||
| 126 | * Describe the reference that this thing has to target. This will only | ||
| 127 | * be called if target is in the array returned by getChildrenForRootset. | ||
| 128 | */ | ||
| 129 | public String describeReferenceTo(JavaThing target, Snapshot ss) { | ||
| 130 | JavaThing[] elements = getElements(); | ||
| 131 | for (int i = 0; i < elements.length; i++) { | ||
| 132 | if (elements[i] == target) { | ||
| 133 | return "Element " + i + " of " + this; | ||
| 134 | } | ||
| 135 | } | ||
| 136 | return super.describeReferenceTo(target, ss); | ||
| 137 | } | ||
| 138 | |||
| 139 | /* | ||
| 140 | * Java object array record (HPROF_GC_OBJ_ARRAY_DUMP) | ||
| 141 | * looks as below: | ||
| 142 | * | ||
| 143 | * object ID | ||
| 144 | * stack trace serial number (int) | ||
| 145 | * array length (int) | ||
| 146 | * array class ID | ||
| 147 | * array element IDs | ||
| 148 | */ | ||
| 149 | protected final int readValueLength() throws IOException { | ||
| 150 | JavaClass cl = getClazz(); | ||
| 151 | ReadBuffer buf = cl.getReadBuffer(); | ||
| 152 | int idSize = cl.getIdentifierSize(); | ||
| 153 | long offset = getOffset() + idSize + 4; | ||
| 154 | int len = buf.getInt(offset); | ||
| 155 | return len * cl.getIdentifierSize(); | ||
| 156 | } | ||
| 157 | |||
| 158 | protected final byte[] readValue() throws IOException { | ||
| 159 | JavaClass cl = getClazz(); | ||
| 160 | ReadBuffer buf = cl.getReadBuffer(); | ||
| 161 | int idSize = cl.getIdentifierSize(); | ||
| 162 | long offset = getOffset() + idSize + 4; | ||
| 163 | int len = buf.getInt(offset); | ||
| 164 | if (len == 0) { | ||
| 165 | return Snapshot.EMPTY_BYTE_ARRAY; | ||
| 166 | } else { | ||
| 167 | byte[] res = new byte[len * idSize]; | ||
| 168 | buf.get(offset + 4 + idSize, res); | ||
| 169 | return res; | ||
| 170 | } | ||
| 171 | } | ||
| 172 | } | ||