Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCache.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | da91efe96a93 |
| children |
| rev | line source |
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| 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.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
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34 // ConstantPoolCache : A constant pool cache (ConstantPoolCache). |
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35 // See cpCache.hpp for details about this class. |
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36 // |
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37 public class ConstantPoolCache extends Metadata { |
| 0 | 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 { | |
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47 Type type = db.lookupType("ConstantPoolCache"); |
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48 constants = new MetadataField(type.getAddressField("_constant_pool"), 0); |
| 0 | 49 baseOffset = type.getSize(); |
| 50 Type elType = db.lookupType("ConstantPoolCacheEntry"); | |
| 51 elementSize = elType.getSize(); | |
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52 length = new CIntField(type.getCIntegerField("_length"), 0); |
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53 intSize = VM.getVM().getObjectHeap().getIntSize(); |
| 0 | 54 } |
| 55 | |
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56 public ConstantPoolCache(Address addr) { |
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57 super(addr); |
| 0 | 58 } |
| 59 | |
| 60 public boolean isConstantPoolCache() { return true; } | |
| 61 | |
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62 private static MetadataField constants; |
| 0 | 63 |
| 64 private static long baseOffset; | |
| 65 private static long elementSize; | |
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66 private static CIntField length; |
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67 private static long intSize; |
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68 |
| 0 | 69 |
| 70 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } | |
| 71 | |
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72 public long getSize() { |
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73 return Oop.alignObjectSize(baseOffset + getLength() * elementSize); |
| 0 | 74 } |
| 75 | |
| 76 public ConstantPoolCacheEntry getEntryAt(int i) { | |
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77 if (i < 0 || i >= getLength()) throw new IndexOutOfBoundsException(i + " " + getLength()); |
| 0 | 78 return new ConstantPoolCacheEntry(this, i); |
| 79 } | |
| 80 | |
| 81 public int getIntAt(int entry, int fld) { | |
| 82 //alignObjectSize ? | |
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83 long offset = baseOffset + /*alignObjectSize*/entry * elementSize + fld * intSize; |
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84 return (int) getAddress().getCIntegerAt(offset, intSize, true ); |
| 0 | 85 } |
| 86 | |
| 87 | |
| 88 public void printValueOn(PrintStream tty) { | |
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89 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString() + " address = " + getAddress() + " offset = " + baseOffset); |
| 0 | 90 } |
| 91 | |
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92 public int getLength() { |
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93 return (int) length.getValue(getAddress()); |
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94 } |
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95 |
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96 public void iterateFields(MetadataVisitor visitor) { |
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97 super.iterateFields(visitor); |
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98 visitor.doMetadata(constants, true); |
| 0 | 99 for (int i = 0; i < getLength(); i++) { |
| 100 ConstantPoolCacheEntry entry = getEntryAt(i); | |
| 101 entry.iterateFields(visitor); | |
| 102 } | |
| 103 } | |
| 104 }; |