Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHistogram.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 | c18cbe5936b8 |
children |
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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.*; public class ObjectHistogram implements HeapVisitor { public ObjectHistogram() { map = new HashMap(); } private HashMap map; public void prologue(long size) {} public boolean doObj(Oop obj) { Klass klass = obj.getKlass(); if (!map.containsKey(klass)) map.put(klass, new ObjectHistogramElement(klass)); ((ObjectHistogramElement) map.get(klass)).updateWith(obj); return false; } public void epilogue() {} /** Call this after the iteration is complete to obtain the ObjectHistogramElements in descending order of total heap size consumed in the form of a List<ObjectHistogramElement>. */ public List getElements() { List list = new ArrayList(); list.addAll(map.values()); Collections.sort(list, new Comparator() { public int compare(Object o1, Object o2) { return ((ObjectHistogramElement) o1).compare((ObjectHistogramElement) o2); } }); return list; } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { List list = getElements(); ObjectHistogramElement.titleOn(tty); Iterator iterator = list.listIterator(); int num=0; int totalCount=0; int totalSize=0; while (iterator.hasNext()) { ObjectHistogramElement el = (ObjectHistogramElement) iterator.next(); num++; totalCount+=el.getCount(); totalSize+=el.getSize(); tty.print(num + ":" + "\t\t"); el.printOn(tty); } tty.println("Total : " + "\t" + totalCount + "\t" + totalSize); } }