Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Oop.java @ 2411:63997f575155
7031614: jmap -permstat fails with java.lang.InternalError in sun.jvm.hotspot.oops.OopField.getValue
Reviewed-by: kvn, dcubed
| author | never |
|---|---|
| date | Wed, 30 Mar 2011 07:47:19 -0700 |
| parents | 0a8e0d4345b3 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 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.utilities.*; | |
| 30 import sun.jvm.hotspot.debugger.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.types.*; | |
| 33 import sun.jvm.hotspot.memory.CompactingPermGenGen; | |
| 34 | |
| 35 // Oop represents the superclass for all types of | |
| 36 // objects in the HotSpot object heap. | |
| 37 | |
| 38 public class Oop { | |
| 39 static { | |
| 40 VM.registerVMInitializedObserver(new Observer() { | |
| 41 public void update(Observable o, Object data) { | |
| 42 initialize(VM.getVM().getTypeDataBase()); | |
| 43 } | |
| 44 }); | |
| 45 } | |
| 46 | |
| 47 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 48 Type type = db.lookupType("oopDesc"); | |
| 49 mark = new CIntField(type.getCIntegerField("_mark"), 0); | |
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50 klass = new OopField(type.getOopField("_metadata._klass"), 0); |
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51 compressedKlass = new NarrowOopField(type.getOopField("_metadata._compressed_klass"), 0); |
| 0 | 52 headerSize = type.getSize(); |
| 53 } | |
| 54 | |
| 55 private OopHandle handle; | |
| 56 private ObjectHeap heap; | |
| 57 | |
| 58 Oop(OopHandle handle, ObjectHeap heap) { | |
| 59 this.handle = handle; | |
| 60 this.heap = heap; | |
| 61 } | |
| 62 | |
| 63 ObjectHeap getHeap() { return heap; } | |
| 64 | |
| 65 /** Should not be used or needed by most clients outside this | |
| 66 package; is needed, however, by {@link | |
| 67 sun.jvm.hotspot.utilities.MarkBits}. */ | |
| 68 public OopHandle getHandle() { return handle; } | |
| 69 | |
| 70 private static long headerSize; | |
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71 public static long getHeaderSize() { return headerSize; } // Header size in bytes. |
| 0 | 72 |
| 73 private static CIntField mark; | |
| 74 private static OopField klass; | |
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75 private static NarrowOopField compressedKlass; |
| 0 | 76 |
| 77 public boolean isShared() { | |
| 78 return CompactingPermGenGen.isShared(handle); | |
| 79 } | |
| 80 | |
| 81 public boolean isSharedReadOnly() { | |
| 82 return CompactingPermGenGen.isSharedReadOnly(handle); | |
| 83 } | |
| 84 | |
| 85 public boolean isSharedReadWrite() { | |
| 86 return CompactingPermGenGen.isSharedReadWrite(handle); | |
| 87 } | |
| 88 | |
| 89 // Accessors for declared fields | |
| 90 public Mark getMark() { return new Mark(getHandle()); } | |
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91 public Klass getKlass() { |
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92 if (VM.getVM().isCompressedOopsEnabled()) { |
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93 return (Klass) compressedKlass.getValue(this); |
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94 } else { |
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95 return (Klass) klass.getValue(this); |
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96 } |
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97 } |
| 0 | 98 |
| 99 public boolean isA(Klass k) { | |
| 100 return getKlass().isSubtypeOf(k); | |
| 101 } | |
| 102 | |
| 103 // Returns the byte size of this object | |
| 104 public long getObjectSize() { | |
| 105 Klass k = getKlass(); | |
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106 // All other types should be overriding getObjectSize directly |
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107 return ((InstanceKlass)k).getObjectSize(this); |
| 0 | 108 } |
| 109 | |
| 110 // Type test operations | |
| 111 public boolean isInstance() { return false; } | |
| 112 public boolean isInstanceRef() { return false; } | |
| 113 public boolean isArray() { return false; } | |
| 114 public boolean isObjArray() { return false; } | |
| 115 public boolean isTypeArray() { return false; } | |
| 116 public boolean isSymbol() { return false; } | |
| 117 public boolean isKlass() { return false; } | |
| 118 public boolean isThread() { return false; } | |
| 119 public boolean isMethod() { return false; } | |
| 120 public boolean isMethodData() { return false; } | |
| 121 public boolean isConstantPool() { return false; } | |
| 122 public boolean isConstantPoolCache() { return false; } | |
| 123 public boolean isCompiledICHolder() { return false; } | |
| 124 | |
| 125 // Align the object size. | |
| 126 public static long alignObjectSize(long size) { | |
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127 return VM.getVM().alignUp(size, VM.getVM().getMinObjAlignmentInBytes()); |
| 0 | 128 } |
| 129 | |
| 130 // All vm's align longs, so pad out certain offsets. | |
| 131 public static long alignObjectOffset(long offset) { | |
| 132 return VM.getVM().alignUp(offset, VM.getVM().getBytesPerLong()); | |
| 133 } | |
| 134 | |
| 135 public boolean equals(Object obj) { | |
| 136 if (obj != null && (obj instanceof Oop)) { | |
| 137 return getHandle().equals(((Oop) obj).getHandle()); | |
| 138 } | |
| 139 return false; | |
| 140 } | |
| 141 | |
| 142 public int hashCode() { return getHandle().hashCode(); } | |
| 143 | |
| 144 /** Identity hash in the target VM */ | |
| 145 public long identityHash() { | |
| 146 Mark mark = getMark(); | |
| 147 if (mark.isUnlocked() && (!mark.hasNoHash())) { | |
| 148 return (int) mark.hash(); | |
| 149 } else if (mark.isMarked()) { | |
| 150 return (int) mark.hash(); | |
| 151 } else { | |
| 152 return slowIdentityHash(); | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 public long slowIdentityHash() { | |
| 157 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this); | |
| 158 } | |
| 159 | |
| 160 public void iterate(OopVisitor visitor, boolean doVMFields) { | |
| 161 visitor.setObj(this); | |
| 162 visitor.prologue(); | |
| 163 iterateFields(visitor, doVMFields); | |
| 164 visitor.epilogue(); | |
| 165 } | |
| 166 | |
| 167 void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 168 if (doVMFields) { | |
| 169 visitor.doCInt(mark, true); | |
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170 if (VM.getVM().isCompressedOopsEnabled()) { |
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171 visitor.doOop(compressedKlass, true); |
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172 } else { |
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173 visitor.doOop(klass, true); |
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174 } |
| 0 | 175 } |
| 176 } | |
| 177 | |
| 178 public void print() { printOn(System.out); } | |
| 179 public void printValue() { printValueOn(System.out); } | |
| 180 public void printRaw() { printRawOn(System.out); } | |
| 181 | |
| 182 public static void printOopValueOn(Oop obj, PrintStream tty) { | |
| 183 if (obj == null) { | |
| 184 tty.print("null"); | |
| 185 } else { | |
| 186 obj.printValueOn(tty); | |
| 187 tty.print(" @ " + obj.getHandle()); | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 public static void printOopAddressOn(Oop obj, PrintStream tty) { | |
| 192 if (obj == null) { | |
| 193 tty.print("null"); | |
| 194 } else { | |
| 195 tty.print(obj.getHandle().toString()); | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 public void printOn(PrintStream tty) { | |
| 200 OopPrinter printer = new OopPrinter(tty); | |
| 201 iterate(printer, true); | |
| 202 } | |
| 203 | |
| 204 public void printValueOn(PrintStream tty) { | |
| 205 try { | |
| 206 tty.print("Oop for " + getKlass().getName().asString()); | |
| 207 } catch (java.lang.NullPointerException e) { | |
| 208 tty.print("Oop"); | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 public void printRawOn(PrintStream tty) { | |
| 213 tty.print("Dumping raw memory for "); | |
| 214 printValueOn(tty); | |
| 215 tty.println(); | |
| 216 long size = getObjectSize() * 4; | |
| 217 for (long i = 0; i < size; i += 4) { | |
| 218 long memVal = getHandle().getCIntegerAt(i, 4, true); | |
| 219 tty.println(Long.toHexString(memVal)); | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 public boolean verify() { return true;} | |
| 224 | |
| 225 // Package-private routine to speed up ObjectHeap.newOop | |
| 226 static OopHandle getKlassForOopHandle(OopHandle handle) { | |
| 227 if (handle == null) { | |
| 228 return null; | |
| 229 } | |
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230 if (VM.getVM().isCompressedOopsEnabled()) { |
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231 return handle.getCompOopHandleAt(compressedKlass.getOffset()); |
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232 } else { |
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233 return handle.getOopHandleAt(klass.getOffset()); |
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234 } |
| 0 | 235 } |
| 236 }; |