Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Oop.java @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | ba764ed4b6f2 |
| children | c18cbe5936b8 2d127394260e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2000-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 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(); | |
| 106 if (k instanceof InstanceKlass) { | |
| 107 return ((InstanceKlass)k).getSizeHelper() | |
| 108 * VM.getVM().getAddressSize(); | |
| 109 } | |
| 110 // If it is not an instance, this method should be replaced. | |
| 111 return getHeaderSize(); | |
| 112 } | |
| 113 | |
| 114 // Type test operations | |
| 115 public boolean isInstance() { return false; } | |
| 116 public boolean isInstanceRef() { return false; } | |
| 117 public boolean isArray() { return false; } | |
| 118 public boolean isObjArray() { return false; } | |
| 119 public boolean isTypeArray() { return false; } | |
| 120 public boolean isSymbol() { return false; } | |
| 121 public boolean isKlass() { return false; } | |
| 122 public boolean isThread() { return false; } | |
| 123 public boolean isMethod() { return false; } | |
| 124 public boolean isMethodData() { return false; } | |
| 125 public boolean isConstantPool() { return false; } | |
| 126 public boolean isConstantPoolCache() { return false; } | |
| 127 public boolean isCompiledICHolder() { return false; } | |
| 128 | |
| 129 // Align the object size. | |
| 130 public static long alignObjectSize(long size) { | |
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131 return VM.getVM().alignUp(size, VM.getVM().getMinObjAlignment()); |
| 0 | 132 } |
| 133 | |
| 134 // All vm's align longs, so pad out certain offsets. | |
| 135 public static long alignObjectOffset(long offset) { | |
| 136 return VM.getVM().alignUp(offset, VM.getVM().getBytesPerLong()); | |
| 137 } | |
| 138 | |
| 139 public boolean equals(Object obj) { | |
| 140 if (obj != null && (obj instanceof Oop)) { | |
| 141 return getHandle().equals(((Oop) obj).getHandle()); | |
| 142 } | |
| 143 return false; | |
| 144 } | |
| 145 | |
| 146 public int hashCode() { return getHandle().hashCode(); } | |
| 147 | |
| 148 /** Identity hash in the target VM */ | |
| 149 public long identityHash() { | |
| 150 Mark mark = getMark(); | |
| 151 if (mark.isUnlocked() && (!mark.hasNoHash())) { | |
| 152 return (int) mark.hash(); | |
| 153 } else if (mark.isMarked()) { | |
| 154 return (int) mark.hash(); | |
| 155 } else { | |
| 156 return slowIdentityHash(); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 public long slowIdentityHash() { | |
| 161 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this); | |
| 162 } | |
| 163 | |
| 164 public void iterate(OopVisitor visitor, boolean doVMFields) { | |
| 165 visitor.setObj(this); | |
| 166 visitor.prologue(); | |
| 167 iterateFields(visitor, doVMFields); | |
| 168 visitor.epilogue(); | |
| 169 } | |
| 170 | |
| 171 void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 172 if (doVMFields) { | |
| 173 visitor.doCInt(mark, true); | |
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174 if (VM.getVM().isCompressedOopsEnabled()) { |
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175 visitor.doOop(compressedKlass, true); |
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176 } else { |
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177 visitor.doOop(klass, true); |
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178 } |
| 0 | 179 } |
| 180 } | |
| 181 | |
| 182 public void print() { printOn(System.out); } | |
| 183 public void printValue() { printValueOn(System.out); } | |
| 184 public void printRaw() { printRawOn(System.out); } | |
| 185 | |
| 186 public static void printOopValueOn(Oop obj, PrintStream tty) { | |
| 187 if (obj == null) { | |
| 188 tty.print("null"); | |
| 189 } else { | |
| 190 obj.printValueOn(tty); | |
| 191 tty.print(" @ " + obj.getHandle()); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 public static void printOopAddressOn(Oop obj, PrintStream tty) { | |
| 196 if (obj == null) { | |
| 197 tty.print("null"); | |
| 198 } else { | |
| 199 tty.print(obj.getHandle().toString()); | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 public void printOn(PrintStream tty) { | |
| 204 OopPrinter printer = new OopPrinter(tty); | |
| 205 iterate(printer, true); | |
| 206 } | |
| 207 | |
| 208 public void printValueOn(PrintStream tty) { | |
| 209 try { | |
| 210 tty.print("Oop for " + getKlass().getName().asString()); | |
| 211 } catch (java.lang.NullPointerException e) { | |
| 212 tty.print("Oop"); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 public void printRawOn(PrintStream tty) { | |
| 217 tty.print("Dumping raw memory for "); | |
| 218 printValueOn(tty); | |
| 219 tty.println(); | |
| 220 long size = getObjectSize() * 4; | |
| 221 for (long i = 0; i < size; i += 4) { | |
| 222 long memVal = getHandle().getCIntegerAt(i, 4, true); | |
| 223 tty.println(Long.toHexString(memVal)); | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 public boolean verify() { return true;} | |
| 228 | |
| 229 // Package-private routine to speed up ObjectHeap.newOop | |
| 230 static OopHandle getKlassForOopHandle(OopHandle handle) { | |
| 231 if (handle == null) { | |
| 232 return null; | |
| 233 } | |
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234 if (VM.getVM().isCompressedOopsEnabled()) { |
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235 return handle.getCompOopHandleAt(compressedKlass.getOffset()); |
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236 } else { |
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237 return handle.getOopHandleAt(klass.getOffset()); |
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238 } |
| 0 | 239 } |
| 240 }; |