--- old/agent/src/share/classes/sun/jvm/hotspot/tools/PermStat.java 2013-02-20 16:46:03.232703885 +0100 +++ /dev/null 2013-02-19 18:27:51.183525753 +0100 @@ -1,277 +0,0 @@ -/* - * Copyright (c) 2003, 2012, 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.tools; - -import java.io.*; -import java.util.*; - -import sun.jvm.hotspot.debugger.*; -import sun.jvm.hotspot.memory.*; -import sun.jvm.hotspot.oops.*; -import sun.jvm.hotspot.runtime.*; -import sun.jvm.hotspot.tools.*; -import sun.jvm.hotspot.utilities.*; - -/** - A command line tool to print perm. generation statistics. -*/ - -public class PermStat extends Tool { - boolean verbose = true; - - public static void main(String[] args) { - PermStat ps = new PermStat(); - ps.start(args); - ps.stop(); - } - - private static class ClassData { - Klass klass; - long size; - - ClassData(Klass klass, long size) { - this.klass = klass; this.size = size; - } - } - - private static class LoaderData { - long numClasses; - long classSize; - List classDetail = new ArrayList(); // List - } - - public void run() { - printClassLoaderStatistics(); - } - - private void printClassLoaderStatistics() { - final PrintStream out = System.out; - final PrintStream err = System.err; - final Map loaderMap = new HashMap(); - // loader data for bootstrap class loader - final LoaderData bootstrapLoaderData = new LoaderData(); - if (verbose) { - err.print("finding class loader instances .."); - } - - VM vm = VM.getVM(); - ObjectHeap heap = vm.getObjectHeap(); - Klass classLoaderKlass = vm.getSystemDictionary().getClassLoaderKlass(); - try { - heap.iterateObjectsOfKlass(new DefaultHeapVisitor() { - public boolean doObj(Oop oop) { - loaderMap.put(oop, new LoaderData()); - return false; - } - }, classLoaderKlass); - } catch (Exception se) { - se.printStackTrace(); - } - - if (verbose) { - err.println("done."); - err.print("computing per loader stat .."); - } - - SystemDictionary dict = VM.getVM().getSystemDictionary(); - dict.classesDo(new SystemDictionary.ClassAndLoaderVisitor() { - public void visit(Klass k, Oop loader) { - if (! (k instanceof InstanceKlass)) { - return; - } - LoaderData ld = (loader != null) ? (LoaderData)loaderMap.get(loader) - : bootstrapLoaderData; - if (ld != null) { - ld.numClasses++; - long size = computeSize((InstanceKlass)k); - ld.classDetail.add(new ClassData(k, size)); - ld.classSize += size; - } - } - }); - - if (verbose) { - err.println("done."); - err.print("please wait.. computing liveness"); - } - - // compute reverse pointer analysis (takes long time for larger app) - ReversePtrsAnalysis analysis = new ReversePtrsAnalysis(); - - if (verbose) { - analysis.setHeapProgressThunk(new HeapProgressThunk() { - public void heapIterationFractionUpdate(double fractionOfHeapVisited) { - err.print('.'); - } - // This will be called after the iteration is complete - public void heapIterationComplete() { - err.println("done."); - } - }); - } - - try { - analysis.run(); - } catch (Exception e) { - // e.printStackTrace(); - if (verbose) - err.println("liveness analysis may be inaccurate ..."); - } - ReversePtrs liveness = VM.getVM().getRevPtrs(); - - out.println("class_loader\tclasses\tbytes\tparent_loader\talive?\ttype"); - out.println(); - - long numClassLoaders = 1L; - long totalNumClasses = bootstrapLoaderData.numClasses; - long totalClassSize = bootstrapLoaderData.classSize; - long numAliveLoaders = 1L; - long numDeadLoaders = 0L; - - // print bootstrap loader details - out.print(""); - out.print('\t'); - out.print(bootstrapLoaderData.numClasses); - out.print('\t'); - out.print(bootstrapLoaderData.classSize); - out.print('\t'); - out.print(" null "); - out.print('\t'); - // bootstrap loader is always alive - out.print("live"); - out.print('\t'); - out.println(""); - - for (Iterator keyItr = loaderMap.keySet().iterator(); keyItr.hasNext();) { - Oop loader = (Oop) keyItr.next(); - LoaderData data = (LoaderData) loaderMap.get(loader); - numClassLoaders ++; - totalNumClasses += data.numClasses; - totalClassSize += data.classSize; - - out.print(loader.getHandle()); - out.print('\t'); - out.print(data.numClasses); - out.print('\t'); - out.print(data.classSize); - out.print('\t'); - - class ParentFinder extends DefaultOopVisitor { - public void doOop(OopField field, boolean isVMField) { - if (field.getID().getName().equals("parent")) { - parent = field.getValue(getObj()); - } - } - private Oop parent = null; - public Oop getParent() { return parent; } - } - - ParentFinder parentFinder = new ParentFinder(); - loader.iterate(parentFinder, false); - Oop parent = parentFinder.getParent(); - out.print((parent != null)? parent.getHandle().toString() : " null "); - out.print('\t'); - boolean alive = (liveness != null) ? (liveness.get(loader) != null) : true; - out.print(alive? "live" : "dead"); - if (alive) numAliveLoaders++; else numDeadLoaders++; - out.print('\t'); - Klass loaderKlass = loader.getKlass(); - if (loaderKlass != null) { - out.print(loaderKlass.getName().asString()); - out.print('@'); - out.print(loader.getKlass().getAddress()); - } else { - out.print(" null! "); - } - out.println(); - } - - out.println(); - // summary line - out.print("total = "); - out.print(numClassLoaders); - out.print('\t'); - out.print(totalNumClasses); - out.print('\t'); - out.print(totalClassSize); - out.print('\t'); - out.print(" N/A "); - out.print('\t'); - out.print("alive="); - out.print(numAliveLoaders); - out.print(", dead="); - out.print(numDeadLoaders); - out.print('\t'); - out.print(" N/A "); - out.println(); - } - - private static long objectSize(Oop oop) { - return oop == null ? 0L : oop.getObjectSize(); - } - - // Don't count the shared empty arrays - private static long arraySize(GenericArray arr) { - return arr.getLength() != 0L ? arr.getSize() : 0L; - } - - private long computeSize(InstanceKlass k) { - long size = 0L; - // the InstanceKlass object itself - size += k.getSize(); - - // Constant pool - ConstantPool cp = k.getConstants(); - size += cp.getSize(); - if (cp.getCache() != null) { - size += cp.getCache().getSize(); - } - size += arraySize(cp.getTags()); - - // Interfaces - size += arraySize(k.getLocalInterfaces()); - size += arraySize(k.getTransitiveInterfaces()); - - // Inner classes - size += arraySize(k.getInnerClasses()); - - // Fields - size += arraySize(k.getFields()); - - // Methods - MethodArray methods = k.getMethods(); - int nmethods = (int) methods.getLength(); - if (nmethods != 0L) { - size += methods.getSize(); - for (int i = 0; i < nmethods; ++i) { - Method m = methods.at(i); - size += m.getSize(); - size += m.getConstMethod().getSize(); - } - } - - return size; - } -}