Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Oop.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 63997f575155 |
| children | 8e47bac5643a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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 if (VM.getVM().isCompressedHeadersEnabled()) { |
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51 // compressedKlass = new CIntField(type.getCIntegerField("_metadata._compressed_klass"), 0); |
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52 throw new InternalError("unimplemented"); |
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53 } |
| 0 | 54 headerSize = type.getSize(); |
| 55 } | |
| 56 | |
| 57 private OopHandle handle; | |
| 58 private ObjectHeap heap; | |
| 59 | |
| 60 Oop(OopHandle handle, ObjectHeap heap) { | |
| 61 this.handle = handle; | |
| 62 this.heap = heap; | |
| 63 } | |
| 64 | |
| 65 ObjectHeap getHeap() { return heap; } | |
| 66 | |
| 67 /** Should not be used or needed by most clients outside this | |
| 68 package; is needed, however, by {@link | |
| 69 sun.jvm.hotspot.utilities.MarkBits}. */ | |
| 70 public OopHandle getHandle() { return handle; } | |
| 71 | |
| 72 private static long headerSize; | |
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73 public static long getHeaderSize() { return headerSize; } // Header size in bytes. |
| 0 | 74 |
| 75 private static CIntField mark; | |
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76 private static MetadataField klass; |
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77 private static CIntField compressedKlass; |
| 0 | 78 |
| 79 // Accessors for declared fields | |
| 80 public Mark getMark() { return new Mark(getHandle()); } | |
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81 public Klass getKlass() { |
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82 if (VM.getVM().isCompressedHeadersEnabled()) { |
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83 throw new InternalError("unimplemented"); |
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84 } else { |
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85 return (Klass)klass.getValue(getHandle()); |
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86 } |
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87 } |
| 0 | 88 |
| 89 public boolean isA(Klass k) { | |
| 90 return getKlass().isSubtypeOf(k); | |
| 91 } | |
| 92 | |
| 93 // Returns the byte size of this object | |
| 94 public long getObjectSize() { | |
| 95 Klass k = getKlass(); | |
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96 // All other types should be overriding getObjectSize directly |
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97 return ((InstanceKlass)k).getObjectSize(this); |
| 0 | 98 } |
| 99 | |
| 100 // Type test operations | |
| 101 public boolean isInstance() { return false; } | |
| 102 public boolean isInstanceRef() { return false; } | |
| 103 public boolean isArray() { return false; } | |
| 104 public boolean isObjArray() { return false; } | |
| 105 public boolean isTypeArray() { return false; } | |
| 106 public boolean isThread() { return false; } | |
| 107 | |
| 108 // Align the object size. | |
| 109 public static long alignObjectSize(long size) { | |
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110 return VM.getVM().alignUp(size, VM.getVM().getMinObjAlignmentInBytes()); |
| 0 | 111 } |
| 112 | |
| 113 // All vm's align longs, so pad out certain offsets. | |
| 114 public static long alignObjectOffset(long offset) { | |
| 115 return VM.getVM().alignUp(offset, VM.getVM().getBytesPerLong()); | |
| 116 } | |
| 117 | |
| 118 public boolean equals(Object obj) { | |
| 119 if (obj != null && (obj instanceof Oop)) { | |
| 120 return getHandle().equals(((Oop) obj).getHandle()); | |
| 121 } | |
| 122 return false; | |
| 123 } | |
| 124 | |
| 125 public int hashCode() { return getHandle().hashCode(); } | |
| 126 | |
| 127 /** Identity hash in the target VM */ | |
| 128 public long identityHash() { | |
| 129 Mark mark = getMark(); | |
| 130 if (mark.isUnlocked() && (!mark.hasNoHash())) { | |
| 131 return (int) mark.hash(); | |
| 132 } else if (mark.isMarked()) { | |
| 133 return (int) mark.hash(); | |
| 134 } else { | |
| 135 return slowIdentityHash(); | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 public long slowIdentityHash() { | |
| 140 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this); | |
| 141 } | |
| 142 | |
| 143 public void iterate(OopVisitor visitor, boolean doVMFields) { | |
| 144 visitor.setObj(this); | |
| 145 visitor.prologue(); | |
| 146 iterateFields(visitor, doVMFields); | |
| 147 visitor.epilogue(); | |
| 148 } | |
| 149 | |
| 150 void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 151 if (doVMFields) { | |
| 152 visitor.doCInt(mark, true); | |
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153 if (VM.getVM().isCompressedHeadersEnabled()) { |
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154 throw new InternalError("unimplemented"); |
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155 } else { |
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156 visitor.doMetadata(klass, true); |
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157 } |
| 0 | 158 } |
| 159 } | |
| 160 | |
| 161 public void print() { printOn(System.out); } | |
| 162 public void printValue() { printValueOn(System.out); } | |
| 163 public void printRaw() { printRawOn(System.out); } | |
| 164 | |
| 165 public static void printOopValueOn(Oop obj, PrintStream tty) { | |
| 166 if (obj == null) { | |
| 167 tty.print("null"); | |
| 168 } else { | |
| 169 obj.printValueOn(tty); | |
| 170 tty.print(" @ " + obj.getHandle()); | |
| 171 } | |
| 172 } | |
| 173 | |
| 174 public static void printOopAddressOn(Oop obj, PrintStream tty) { | |
| 175 if (obj == null) { | |
| 176 tty.print("null"); | |
| 177 } else { | |
| 178 tty.print(obj.getHandle().toString()); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 public void printOn(PrintStream tty) { | |
| 183 OopPrinter printer = new OopPrinter(tty); | |
| 184 iterate(printer, true); | |
| 185 } | |
| 186 | |
| 187 public void printValueOn(PrintStream tty) { | |
| 188 try { | |
| 189 tty.print("Oop for " + getKlass().getName().asString()); | |
| 190 } catch (java.lang.NullPointerException e) { | |
| 191 tty.print("Oop"); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 public void printRawOn(PrintStream tty) { | |
| 196 tty.print("Dumping raw memory for "); | |
| 197 printValueOn(tty); | |
| 198 tty.println(); | |
| 199 long size = getObjectSize() * 4; | |
| 200 for (long i = 0; i < size; i += 4) { | |
| 201 long memVal = getHandle().getCIntegerAt(i, 4, true); | |
| 202 tty.println(Long.toHexString(memVal)); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 public boolean verify() { return true;} | |
| 207 | |
| 208 // Package-private routine to speed up ObjectHeap.newOop | |
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209 static Klass getKlassForOopHandle(OopHandle handle) { |
| 0 | 210 if (handle == null) { |
| 211 return null; | |
| 212 } | |
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213 if (VM.getVM().isCompressedHeadersEnabled()) { |
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214 throw new InternalError("Unimplemented"); |
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215 } else { |
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216 return (Klass)Metadata.instantiateWrapperFor(handle.getAddressAt(klass.getOffset())); |
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217 } |
| 0 | 218 } |
| 219 }; |