Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHistogramElement.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 |
|---|---|
| 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.memory.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 | |
| 32 public class ObjectHistogramElement { | |
| 33 | |
| 34 private Klass klass; | |
| 35 private long count; // Number of instances of klass | |
| 36 private long size; // Total size of all these instances | |
| 37 | |
| 38 public ObjectHistogramElement(Klass k) { | |
| 39 klass = k; | |
| 40 count = 0; | |
| 41 size = 0; | |
| 42 } | |
| 43 | |
| 44 public void updateWith(Oop obj) { | |
| 45 count = count + 1; | |
| 46 size = size + obj.getObjectSize(); | |
| 47 } | |
| 48 | |
| 49 public int compare(ObjectHistogramElement other) { | |
| 50 return (int) (other.size - size); | |
| 51 } | |
| 52 | |
| 53 /** Klass for this ObjectHistogramElement */ | |
| 54 public Klass getKlass() { | |
| 55 return klass; | |
| 56 } | |
| 57 | |
| 58 /** Number of instances of klass */ | |
| 59 public long getCount() { | |
| 60 return count; | |
| 61 } | |
| 62 | |
| 63 /** Total size of all these instances */ | |
| 64 public long getSize() { | |
| 65 return size; | |
| 66 } | |
| 67 | |
| 68 private String getInternalName(Klass k) { | |
| 69 ByteArrayOutputStream bos = new ByteArrayOutputStream(); | |
| 70 getKlass().printValueOn(new PrintStream(bos)); | |
| 71 // '*' is used to denote VM internal klasses. | |
| 72 return "* " + bos.toString(); | |
| 73 } | |
| 74 | |
| 75 /** Human readable description **/ | |
| 76 public String getDescription() { | |
| 77 Klass k = getKlass(); | |
| 78 if (k instanceof InstanceKlass) { | |
| 79 return k.getName().asString().replace('/', '.'); | |
| 80 } else if (k instanceof ArrayKlass) { | |
| 81 ArrayKlass ak = (ArrayKlass) k; | |
| 82 if (k instanceof TypeArrayKlass) { | |
| 83 TypeArrayKlass tak = (TypeArrayKlass) ak; | |
| 84 return tak.getElementTypeName() + "[]"; | |
| 85 } else if (k instanceof ObjArrayKlass) { | |
| 86 ObjArrayKlass oak = (ObjArrayKlass) ak; | |
| 87 Klass bottom = oak.getBottomKlass(); | |
| 88 int dim = (int) oak.getDimension(); | |
| 89 StringBuffer buf = new StringBuffer(); | |
| 90 if (bottom instanceof TypeArrayKlass) { | |
| 91 buf.append(((TypeArrayKlass) bottom).getElementTypeName()); | |
| 92 } else if (bottom instanceof InstanceKlass) { | |
| 93 buf.append(bottom.getName().asString().replace('/', '.')); | |
| 94 } else { | |
| 95 throw new RuntimeException("should not reach here"); | |
| 96 } | |
| 97 for (int i=0; i < dim; i++) { | |
| 98 buf.append("[]"); | |
| 99 } | |
| 100 return buf.toString(); | |
| 101 } | |
| 102 } | |
| 103 return getInternalName(k); | |
| 104 } | |
| 105 | |
| 106 public static void titleOn(PrintStream tty) { | |
| 107 tty.println("Object Histogram:"); | |
| 108 tty.println(); | |
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109 tty.println("num " + "\t" + " #instances" + "\t" + "#bytes" + "\t" + "Class description"); |
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110 tty.println("--------------------------------------------------------------------------"); |
| 0 | 111 } |
| 112 | |
| 113 public void printOn(PrintStream tty) { | |
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114 tty.print(count + "\t" + size + "\t"); |
| 0 | 115 tty.print(getDescription()); |
| 116 tty.println(); | |
| 117 } | |
| 118 } |