3666N/A/*
3666N/A * Copyright 2012 SAP AG. All Rights Reserved.
3666N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3666N/A *
3666N/A * This code is free software; you can redistribute it and/or modify it
3666N/A * under the terms of the GNU General Public License version 2 only, as
3666N/A * published by the Free Software Foundation.
3666N/A *
3666N/A * This code is distributed in the hope that it will be useful, but WITHOUT
3666N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
3666N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
3666N/A * version 2 for more details (a copy is included in the LICENSE file that
3666N/A * accompanied this code).
3666N/A *
3666N/A * You should have received a copy of the GNU General Public License version
3666N/A * 2 along with this work; if not, write to the Free Software Foundation,
3666N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
3666N/A *
3666N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
3666N/A * or visit www.oracle.com if you need additional information or have any
3666N/A * questions.
3666N/A */
3666N/A
3666N/A/*
3666N/A * @test FieldMonitor.java
3666N/A * @bug 7158988
4192N/A * @key regression
3666N/A * @summary verify jvm does not crash while debugging
4192N/A * @run compile TestPostFieldModification.java
4192N/A * @run main/othervm FieldMonitor
3666N/A * @author axel.siebenborn@sap.com
3666N/A */
3666N/Aimport java.io.BufferedReader;
3666N/Aimport java.io.IOException;
3666N/Aimport java.io.InputStream;
3666N/Aimport java.io.InputStreamReader;
3666N/Aimport java.io.OutputStream;
3666N/Aimport java.io.OutputStreamWriter;
3666N/Aimport java.io.Reader;
3666N/Aimport java.io.Writer;
3666N/Aimport java.util.Iterator;
3666N/Aimport java.util.List;
3666N/Aimport java.util.Map;
3666N/A
3666N/Aimport com.sun.jdi.Bootstrap;
3666N/Aimport com.sun.jdi.Field;
3666N/Aimport com.sun.jdi.ReferenceType;
3666N/Aimport com.sun.jdi.VirtualMachine;
3666N/Aimport com.sun.jdi.connect.Connector;
3666N/Aimport com.sun.jdi.connect.IllegalConnectorArgumentsException;
3666N/Aimport com.sun.jdi.connect.LaunchingConnector;
3666N/Aimport com.sun.jdi.connect.VMStartException;
3666N/Aimport com.sun.jdi.event.ClassPrepareEvent;
3666N/Aimport com.sun.jdi.event.Event;
3666N/Aimport com.sun.jdi.event.EventQueue;
3666N/Aimport com.sun.jdi.event.EventSet;
3666N/Aimport com.sun.jdi.event.ModificationWatchpointEvent;
3666N/Aimport com.sun.jdi.event.VMDeathEvent;
3666N/Aimport com.sun.jdi.event.VMDisconnectEvent;
3666N/Aimport com.sun.jdi.request.ClassPrepareRequest;
3666N/Aimport com.sun.jdi.request.EventRequest;
3666N/Aimport com.sun.jdi.request.EventRequestManager;
3666N/Aimport com.sun.jdi.request.ModificationWatchpointRequest;
3666N/A
3666N/Apublic class FieldMonitor {
3666N/A
3666N/A public static final String CLASS_NAME = "TestPostFieldModification";
3666N/A public static final String FIELD_NAME = "value";
3666N/A public static final String ARGUMENTS = "-Xshare:off -XX:+PrintGC";
3666N/A
3666N/A public static void main(String[] args)
3666N/A throws IOException, InterruptedException {
3666N/A
3666N/A StringBuffer sb = new StringBuffer();
3666N/A
3666N/A for (int i=0; i < args.length; i++) {
3666N/A sb.append(' ');
3666N/A sb.append(args[i]);
3666N/A }
3666N/A //VirtualMachine vm = launchTarget(sb.toString());
3666N/A VirtualMachine vm = launchTarget(CLASS_NAME);
3666N/A
3666N/A System.out.println("Vm launched");
3666N/A // set watch field on already loaded classes
3666N/A List<ReferenceType> referenceTypes = vm
3666N/A .classesByName(CLASS_NAME);
3666N/A for (ReferenceType refType : referenceTypes) {
3666N/A addFieldWatch(vm, refType);
3666N/A }
3666N/A // watch for loaded classes
3666N/A addClassWatch(vm);
3666N/A
3666N/A // process events
3666N/A EventQueue eventQueue = vm.eventQueue();
3666N/A // resume the vm
3666N/A
3666N/A Process process = vm.process();
3666N/A
3666N/A
3666N/A // Copy target's output and error to our output and error.
3666N/A Thread outThread = new StreamRedirectThread("out reader", process.getInputStream());
3666N/A Thread errThread = new StreamRedirectThread("error reader", process.getErrorStream());
3666N/A
3666N/A errThread.start();
3666N/A outThread.start();
3666N/A
3666N/A
3666N/A vm.resume();
3666N/A boolean connected = true;
3666N/A while (connected) {
3666N/A EventSet eventSet = eventQueue.remove();
3666N/A for (Event event : eventSet) {
3666N/A if (event instanceof VMDeathEvent
3666N/A || event instanceof VMDisconnectEvent) {
3666N/A // exit
3666N/A connected = false;
3666N/A } else if (event instanceof ClassPrepareEvent) {
3666N/A // watch field on loaded class
3666N/A System.out.println("ClassPrepareEvent");
3666N/A ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
3666N/A ReferenceType refType = classPrepEvent
3666N/A .referenceType();
3666N/A addFieldWatch(vm, refType);
3666N/A } else if (event instanceof ModificationWatchpointEvent) {
3666N/A System.out.println("sleep for 500 ms");
3666N/A Thread.sleep(500);
3666N/A System.out.println("resume...");
3666N/A
3666N/A ModificationWatchpointEvent modEvent = (ModificationWatchpointEvent) event;
3666N/A System.out.println("old="
3666N/A + modEvent.valueCurrent());
3666N/A System.out.println("new=" + modEvent.valueToBe());
3666N/A System.out.println();
3666N/A }
3666N/A }
3666N/A eventSet.resume();
3666N/A }
3666N/A // Shutdown begins when event thread terminates
3666N/A try {
3666N/A errThread.join(); // Make sure output is forwarded
3666N/A outThread.join();
3666N/A } catch (InterruptedException exc) {
3666N/A // we don't interrupt
3666N/A }
3666N/A }
3666N/A
3666N/A /**
3666N/A * Find a com.sun.jdi.CommandLineLaunch connector
3666N/A */
3666N/A static LaunchingConnector findLaunchingConnector() {
3666N/A List <Connector> connectors = Bootstrap.virtualMachineManager().allConnectors();
3666N/A Iterator <Connector> iter = connectors.iterator();
3666N/A while (iter.hasNext()) {
3666N/A Connector connector = iter.next();
3666N/A if (connector.name().equals("com.sun.jdi.CommandLineLaunch")) {
3666N/A return (LaunchingConnector)connector;
3666N/A }
3666N/A }
3666N/A throw new Error("No launching connector");
3666N/A }
3666N/A /**
3666N/A * Return the launching connector's arguments.
3666N/A */
3666N/A static Map <String,Connector.Argument> connectorArguments(LaunchingConnector connector, String mainArgs) {
3666N/A Map<String,Connector.Argument> arguments = connector.defaultArguments();
3666N/A for (String key : arguments.keySet()) {
3666N/A System.out.println(key);
3666N/A }
3666N/A
3666N/A Connector.Argument mainArg = (Connector.Argument)arguments.get("main");
3666N/A if (mainArg == null) {
3666N/A throw new Error("Bad launching connector");
3666N/A }
3666N/A mainArg.setValue(mainArgs);
3666N/A
3666N/A Connector.Argument optionsArg = (Connector.Argument)arguments.get("options");
3666N/A if (optionsArg == null) {
3666N/A throw new Error("Bad launching connector");
3666N/A }
3666N/A optionsArg.setValue(ARGUMENTS);
3666N/A return arguments;
3666N/A }
3666N/A
3666N/A static VirtualMachine launchTarget(String mainArgs) {
3666N/A LaunchingConnector connector = findLaunchingConnector();
3666N/A Map arguments = connectorArguments(connector, mainArgs);
3666N/A try {
3666N/A return (VirtualMachine) connector.launch(arguments);
3666N/A } catch (IOException exc) {
3666N/A throw new Error("Unable to launch target VM: " + exc);
3666N/A } catch (IllegalConnectorArgumentsException exc) {
3666N/A throw new Error("Internal error: " + exc);
3666N/A } catch (VMStartException exc) {
3666N/A throw new Error("Target VM failed to initialize: " +
3666N/A exc.getMessage());
3666N/A }
3666N/A}
3666N/A
3666N/A
3666N/A private static void addClassWatch(VirtualMachine vm) {
3666N/A EventRequestManager erm = vm.eventRequestManager();
3666N/A ClassPrepareRequest classPrepareRequest = erm
3666N/A .createClassPrepareRequest();
3666N/A classPrepareRequest.addClassFilter(CLASS_NAME);
3666N/A classPrepareRequest.setEnabled(true);
3666N/A }
3666N/A
3666N/A
3666N/A private static void addFieldWatch(VirtualMachine vm,
3666N/A ReferenceType refType) {
3666N/A EventRequestManager erm = vm.eventRequestManager();
3666N/A Field field = refType.fieldByName(FIELD_NAME);
3666N/A ModificationWatchpointRequest modificationWatchpointRequest = erm
3666N/A .createModificationWatchpointRequest(field);
3666N/A modificationWatchpointRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
3666N/A modificationWatchpointRequest.setEnabled(true);
3666N/A }
3666N/A}
3666N/A
3666N/Aclass StreamRedirectThread extends Thread {
3666N/A
3666N/A private final BufferedReader in;
3666N/A
3666N/A private static final int BUFFER_SIZE = 2048;
3666N/A
3666N/A /**
3666N/A * Set up for copy.
3666N/A * @param name Name of the thread
3666N/A * @param in Stream to copy from
3666N/A * @param out Stream to copy to
3666N/A */
3666N/A StreamRedirectThread(String name, InputStream in) {
3666N/A super(name);
3666N/A this.in = new BufferedReader(new InputStreamReader(in));
3666N/A }
3666N/A
3666N/A /**
3666N/A * Copy.
3666N/A */
3666N/A public void run() {
3666N/A try {
3666N/A String line;
3666N/A while ((line = in.readLine ()) != null) {
3666N/A System.out.println ("testvm: " + line);
3666N/A }
3666N/A System.out.flush();
3666N/A } catch(IOException exc) {
3666N/A System.err.println("Child I/O Transfer - " + exc);
3666N/A }
3666N/A }
3666N/A}