Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHistogramElement.java @ 2468:6c97c830fb6f
Merge
author | jrose |
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date | Sat, 09 Apr 2011 21:16:12 -0700 |
parents | c18cbe5936b8 |
children | da91efe96a93 |
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/* * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; public class ObjectHistogramElement { private Klass klass; private long count; // Number of instances of klass private long size; // Total size of all these instances public ObjectHistogramElement(Klass k) { klass = k; count = 0; size = 0; } public void updateWith(Oop obj) { count = count + 1; size = size + obj.getObjectSize(); } public int compare(ObjectHistogramElement other) { return (int) (other.size - size); } /** Klass for this ObjectHistogramElement */ public Klass getKlass() { return klass; } /** Number of instances of klass */ public long getCount() { return count; } /** Total size of all these instances */ public long getSize() { return size; } private String getInternalName(Klass k) { ByteArrayOutputStream bos = new ByteArrayOutputStream(); getKlass().printValueOn(new PrintStream(bos)); // '*' is used to denote VM internal klasses. return "* " + bos.toString(); } /** Human readable description **/ public String getDescription() { Klass k = getKlass(); if (k instanceof InstanceKlass) { return k.getName().asString().replace('/', '.'); } else if (k instanceof ArrayKlass) { ArrayKlass ak = (ArrayKlass) k; if (k instanceof TypeArrayKlass) { TypeArrayKlass tak = (TypeArrayKlass) ak; return tak.getElementTypeName() + "[]"; } else if (k instanceof ObjArrayKlass) { ObjArrayKlass oak = (ObjArrayKlass) ak; // See whether it's a "system objArray" if (oak.equals(VM.getVM().getUniverse().systemObjArrayKlassObj())) { return "* System ObjArray"; } Klass bottom = oak.getBottomKlass(); int dim = (int) oak.getDimension(); StringBuffer buf = new StringBuffer(); if (bottom instanceof TypeArrayKlass) { buf.append(((TypeArrayKlass) bottom).getElementTypeName()); } else if (bottom instanceof InstanceKlass) { buf.append(bottom.getName().asString().replace('/', '.')); } else { throw new RuntimeException("should not reach here"); } for (int i=0; i < dim; i++) { buf.append("[]"); } return buf.toString(); } } return getInternalName(k); } public static void titleOn(PrintStream tty) { tty.println("Object Histogram:"); tty.println(); tty.println("num " + "\t" + " #instances" + "\t" + "#bytes" + "\t" + "Class description"); tty.println("--------------------------------------------------------------------------"); } public void printOn(PrintStream tty) { tty.print(count + "\t" + size + "\t"); tty.print(getDescription()); tty.println(); } }