Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Oop.java @ 8764:8552f0992748
8008796: SA: Oop.iterateFields() should support CompressedKlassPointers again
Summary: add a missing change from JDK-7054512 so that Oop.iterateFields() works with UseCompressedKlassPointers
Reviewed-by: coleenp, roland
Contributed-by: yunda.mly@taobao.com
| author | kmo |
|---|---|
| date | Fri, 15 Mar 2013 22:07:42 -0700 |
| parents | 8e47bac5643a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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8008796: SA: Oop.iterateFields() should support CompressedKlassPointers again
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2 * Copyright (c) 2000, 2013, 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 | |
| 34 // Oop represents the superclass for all types of | |
| 35 // objects in the HotSpot object heap. | |
| 36 | |
| 37 public class Oop { | |
| 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("oopDesc"); | |
| 48 mark = new CIntField(type.getCIntegerField("_mark"), 0); | |
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49 klass = new MetadataField(type.getAddressField("_metadata._klass"), 0); |
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50 compressedKlass = new NarrowKlassField(type.getAddressField("_metadata._compressed_klass"), 0); |
| 0 | 51 headerSize = type.getSize(); |
| 52 } | |
| 53 | |
| 54 private OopHandle handle; | |
| 55 private ObjectHeap heap; | |
| 56 | |
| 57 Oop(OopHandle handle, ObjectHeap heap) { | |
| 58 this.handle = handle; | |
| 59 this.heap = heap; | |
| 60 } | |
| 61 | |
| 62 ObjectHeap getHeap() { return heap; } | |
| 63 | |
| 64 /** Should not be used or needed by most clients outside this | |
| 65 package; is needed, however, by {@link | |
| 66 sun.jvm.hotspot.utilities.MarkBits}. */ | |
| 67 public OopHandle getHandle() { return handle; } | |
| 68 | |
| 69 private static long headerSize; | |
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70 public static long getHeaderSize() { return headerSize; } // Header size in bytes. |
| 0 | 71 |
| 72 private static CIntField mark; | |
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73 private static MetadataField klass; |
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74 private static NarrowKlassField compressedKlass; |
| 0 | 75 |
| 76 // Accessors for declared fields | |
| 77 public Mark getMark() { return new Mark(getHandle()); } | |
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78 public Klass getKlass() { |
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79 if (VM.getVM().isCompressedKlassPointersEnabled()) { |
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80 return (Klass)compressedKlass.getValue(getHandle()); |
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81 } else { |
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82 return (Klass)klass.getValue(getHandle()); |
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83 } |
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84 } |
| 0 | 85 |
| 86 public boolean isA(Klass k) { | |
| 87 return getKlass().isSubtypeOf(k); | |
| 88 } | |
| 89 | |
| 90 // Returns the byte size of this object | |
| 91 public long getObjectSize() { | |
| 92 Klass k = getKlass(); | |
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93 // All other types should be overriding getObjectSize directly |
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94 return ((InstanceKlass)k).getObjectSize(this); |
| 0 | 95 } |
| 96 | |
| 97 // Type test operations | |
| 98 public boolean isInstance() { return false; } | |
| 99 public boolean isInstanceRef() { return false; } | |
| 100 public boolean isArray() { return false; } | |
| 101 public boolean isObjArray() { return false; } | |
| 102 public boolean isTypeArray() { return false; } | |
| 103 public boolean isThread() { return false; } | |
| 104 | |
| 105 // Align the object size. | |
| 106 public static long alignObjectSize(long size) { | |
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107 return VM.getVM().alignUp(size, VM.getVM().getMinObjAlignmentInBytes()); |
| 0 | 108 } |
| 109 | |
| 110 // All vm's align longs, so pad out certain offsets. | |
| 111 public static long alignObjectOffset(long offset) { | |
| 112 return VM.getVM().alignUp(offset, VM.getVM().getBytesPerLong()); | |
| 113 } | |
| 114 | |
| 115 public boolean equals(Object obj) { | |
| 116 if (obj != null && (obj instanceof Oop)) { | |
| 117 return getHandle().equals(((Oop) obj).getHandle()); | |
| 118 } | |
| 119 return false; | |
| 120 } | |
| 121 | |
| 122 public int hashCode() { return getHandle().hashCode(); } | |
| 123 | |
| 124 /** Identity hash in the target VM */ | |
| 125 public long identityHash() { | |
| 126 Mark mark = getMark(); | |
| 127 if (mark.isUnlocked() && (!mark.hasNoHash())) { | |
| 128 return (int) mark.hash(); | |
| 129 } else if (mark.isMarked()) { | |
| 130 return (int) mark.hash(); | |
| 131 } else { | |
| 132 return slowIdentityHash(); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 public long slowIdentityHash() { | |
| 137 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this); | |
| 138 } | |
| 139 | |
| 140 public void iterate(OopVisitor visitor, boolean doVMFields) { | |
| 141 visitor.setObj(this); | |
| 142 visitor.prologue(); | |
| 143 iterateFields(visitor, doVMFields); | |
| 144 visitor.epilogue(); | |
| 145 } | |
| 146 | |
| 147 void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 148 if (doVMFields) { | |
| 149 visitor.doCInt(mark, true); | |
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150 if (VM.getVM().isCompressedKlassPointersEnabled()) { |
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151 visitor.doMetadata(compressedKlass, true); |
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152 } else { |
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153 visitor.doMetadata(klass, true); |
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154 } |
| 0 | 155 } |
| 156 } | |
| 157 | |
| 158 public void print() { printOn(System.out); } | |
| 159 public void printValue() { printValueOn(System.out); } | |
| 160 public void printRaw() { printRawOn(System.out); } | |
| 161 | |
| 162 public static void printOopValueOn(Oop obj, PrintStream tty) { | |
| 163 if (obj == null) { | |
| 164 tty.print("null"); | |
| 165 } else { | |
| 166 obj.printValueOn(tty); | |
| 167 tty.print(" @ " + obj.getHandle()); | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 public static void printOopAddressOn(Oop obj, PrintStream tty) { | |
| 172 if (obj == null) { | |
| 173 tty.print("null"); | |
| 174 } else { | |
| 175 tty.print(obj.getHandle().toString()); | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 public void printOn(PrintStream tty) { | |
| 180 OopPrinter printer = new OopPrinter(tty); | |
| 181 iterate(printer, true); | |
| 182 } | |
| 183 | |
| 184 public void printValueOn(PrintStream tty) { | |
| 185 try { | |
| 186 tty.print("Oop for " + getKlass().getName().asString()); | |
| 187 } catch (java.lang.NullPointerException e) { | |
| 188 tty.print("Oop"); | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 public void printRawOn(PrintStream tty) { | |
| 193 tty.print("Dumping raw memory for "); | |
| 194 printValueOn(tty); | |
| 195 tty.println(); | |
| 196 long size = getObjectSize() * 4; | |
| 197 for (long i = 0; i < size; i += 4) { | |
| 198 long memVal = getHandle().getCIntegerAt(i, 4, true); | |
| 199 tty.println(Long.toHexString(memVal)); | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 public boolean verify() { return true;} | |
| 204 | |
| 205 // Package-private routine to speed up ObjectHeap.newOop | |
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206 static Klass getKlassForOopHandle(OopHandle handle) { |
| 0 | 207 if (handle == null) { |
| 208 return null; | |
| 209 } | |
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210 if (VM.getVM().isCompressedKlassPointersEnabled()) { |
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211 return (Klass)Metadata.instantiateWrapperFor(handle.getCompKlassAddressAt(compressedKlass.getOffset())); |
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212 } else { |
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213 return (Klass)Metadata.instantiateWrapperFor(handle.getAddressAt(klass.getOffset())); |
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214 } |
| 0 | 215 } |
| 216 }; |