1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/runtime/7158988/FieldMonitor.java Thu Apr 05 12:17:52 2012 -0400
1.3 @@ -0,0 +1,249 @@
1.4 +/*
1.5 + * Copyright 2012 SAP AG. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test FieldMonitor.java
1.29 + * @bug 7158988
1.30 + * @summary verify jvm does not crash while debugging
1.31 + * @run shell TestFieldMonitor.sh
1.32 + * @author axel.siebenborn@sap.com
1.33 + */
1.34 +import java.io.BufferedReader;
1.35 +import java.io.IOException;
1.36 +import java.io.InputStream;
1.37 +import java.io.InputStreamReader;
1.38 +import java.io.OutputStream;
1.39 +import java.io.OutputStreamWriter;
1.40 +import java.io.Reader;
1.41 +import java.io.Writer;
1.42 +import java.util.Iterator;
1.43 +import java.util.List;
1.44 +import java.util.Map;
1.45 +
1.46 +import com.sun.jdi.Bootstrap;
1.47 +import com.sun.jdi.Field;
1.48 +import com.sun.jdi.ReferenceType;
1.49 +import com.sun.jdi.VirtualMachine;
1.50 +import com.sun.jdi.connect.Connector;
1.51 +import com.sun.jdi.connect.IllegalConnectorArgumentsException;
1.52 +import com.sun.jdi.connect.LaunchingConnector;
1.53 +import com.sun.jdi.connect.VMStartException;
1.54 +import com.sun.jdi.event.ClassPrepareEvent;
1.55 +import com.sun.jdi.event.Event;
1.56 +import com.sun.jdi.event.EventQueue;
1.57 +import com.sun.jdi.event.EventSet;
1.58 +import com.sun.jdi.event.ModificationWatchpointEvent;
1.59 +import com.sun.jdi.event.VMDeathEvent;
1.60 +import com.sun.jdi.event.VMDisconnectEvent;
1.61 +import com.sun.jdi.request.ClassPrepareRequest;
1.62 +import com.sun.jdi.request.EventRequest;
1.63 +import com.sun.jdi.request.EventRequestManager;
1.64 +import com.sun.jdi.request.ModificationWatchpointRequest;
1.65 +
1.66 +public class FieldMonitor {
1.67 +
1.68 + public static final String CLASS_NAME = "TestPostFieldModification";
1.69 + public static final String FIELD_NAME = "value";
1.70 + public static final String ARGUMENTS = "-Xshare:off -XX:+PrintGC";
1.71 +
1.72 + public static void main(String[] args)
1.73 + throws IOException, InterruptedException {
1.74 +
1.75 + StringBuffer sb = new StringBuffer();
1.76 +
1.77 + for (int i=0; i < args.length; i++) {
1.78 + sb.append(' ');
1.79 + sb.append(args[i]);
1.80 + }
1.81 + //VirtualMachine vm = launchTarget(sb.toString());
1.82 + VirtualMachine vm = launchTarget(CLASS_NAME);
1.83 +
1.84 + System.out.println("Vm launched");
1.85 + // set watch field on already loaded classes
1.86 + List<ReferenceType> referenceTypes = vm
1.87 + .classesByName(CLASS_NAME);
1.88 + for (ReferenceType refType : referenceTypes) {
1.89 + addFieldWatch(vm, refType);
1.90 + }
1.91 + // watch for loaded classes
1.92 + addClassWatch(vm);
1.93 +
1.94 + // process events
1.95 + EventQueue eventQueue = vm.eventQueue();
1.96 + // resume the vm
1.97 +
1.98 + Process process = vm.process();
1.99 +
1.100 +
1.101 + // Copy target's output and error to our output and error.
1.102 + Thread outThread = new StreamRedirectThread("out reader", process.getInputStream());
1.103 + Thread errThread = new StreamRedirectThread("error reader", process.getErrorStream());
1.104 +
1.105 + errThread.start();
1.106 + outThread.start();
1.107 +
1.108 +
1.109 + vm.resume();
1.110 + boolean connected = true;
1.111 + while (connected) {
1.112 + EventSet eventSet = eventQueue.remove();
1.113 + for (Event event : eventSet) {
1.114 + if (event instanceof VMDeathEvent
1.115 + || event instanceof VMDisconnectEvent) {
1.116 + // exit
1.117 + connected = false;
1.118 + } else if (event instanceof ClassPrepareEvent) {
1.119 + // watch field on loaded class
1.120 + System.out.println("ClassPrepareEvent");
1.121 + ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
1.122 + ReferenceType refType = classPrepEvent
1.123 + .referenceType();
1.124 + addFieldWatch(vm, refType);
1.125 + } else if (event instanceof ModificationWatchpointEvent) {
1.126 + System.out.println("sleep for 500 ms");
1.127 + Thread.sleep(500);
1.128 + System.out.println("resume...");
1.129 +
1.130 + ModificationWatchpointEvent modEvent = (ModificationWatchpointEvent) event;
1.131 + System.out.println("old="
1.132 + + modEvent.valueCurrent());
1.133 + System.out.println("new=" + modEvent.valueToBe());
1.134 + System.out.println();
1.135 + }
1.136 + }
1.137 + eventSet.resume();
1.138 + }
1.139 + // Shutdown begins when event thread terminates
1.140 + try {
1.141 + errThread.join(); // Make sure output is forwarded
1.142 + outThread.join();
1.143 + } catch (InterruptedException exc) {
1.144 + // we don't interrupt
1.145 + }
1.146 + }
1.147 +
1.148 + /**
1.149 + * Find a com.sun.jdi.CommandLineLaunch connector
1.150 + */
1.151 + static LaunchingConnector findLaunchingConnector() {
1.152 + List <Connector> connectors = Bootstrap.virtualMachineManager().allConnectors();
1.153 + Iterator <Connector> iter = connectors.iterator();
1.154 + while (iter.hasNext()) {
1.155 + Connector connector = iter.next();
1.156 + if (connector.name().equals("com.sun.jdi.CommandLineLaunch")) {
1.157 + return (LaunchingConnector)connector;
1.158 + }
1.159 + }
1.160 + throw new Error("No launching connector");
1.161 + }
1.162 + /**
1.163 + * Return the launching connector's arguments.
1.164 + */
1.165 + static Map <String,Connector.Argument> connectorArguments(LaunchingConnector connector, String mainArgs) {
1.166 + Map<String,Connector.Argument> arguments = connector.defaultArguments();
1.167 + for (String key : arguments.keySet()) {
1.168 + System.out.println(key);
1.169 + }
1.170 +
1.171 + Connector.Argument mainArg = (Connector.Argument)arguments.get("main");
1.172 + if (mainArg == null) {
1.173 + throw new Error("Bad launching connector");
1.174 + }
1.175 + mainArg.setValue(mainArgs);
1.176 +
1.177 + Connector.Argument optionsArg = (Connector.Argument)arguments.get("options");
1.178 + if (optionsArg == null) {
1.179 + throw new Error("Bad launching connector");
1.180 + }
1.181 + optionsArg.setValue(ARGUMENTS);
1.182 + return arguments;
1.183 + }
1.184 +
1.185 + static VirtualMachine launchTarget(String mainArgs) {
1.186 + LaunchingConnector connector = findLaunchingConnector();
1.187 + Map arguments = connectorArguments(connector, mainArgs);
1.188 + try {
1.189 + return (VirtualMachine) connector.launch(arguments);
1.190 + } catch (IOException exc) {
1.191 + throw new Error("Unable to launch target VM: " + exc);
1.192 + } catch (IllegalConnectorArgumentsException exc) {
1.193 + throw new Error("Internal error: " + exc);
1.194 + } catch (VMStartException exc) {
1.195 + throw new Error("Target VM failed to initialize: " +
1.196 + exc.getMessage());
1.197 + }
1.198 +}
1.199 +
1.200 +
1.201 + private static void addClassWatch(VirtualMachine vm) {
1.202 + EventRequestManager erm = vm.eventRequestManager();
1.203 + ClassPrepareRequest classPrepareRequest = erm
1.204 + .createClassPrepareRequest();
1.205 + classPrepareRequest.addClassFilter(CLASS_NAME);
1.206 + classPrepareRequest.setEnabled(true);
1.207 + }
1.208 +
1.209 +
1.210 + private static void addFieldWatch(VirtualMachine vm,
1.211 + ReferenceType refType) {
1.212 + EventRequestManager erm = vm.eventRequestManager();
1.213 + Field field = refType.fieldByName(FIELD_NAME);
1.214 + ModificationWatchpointRequest modificationWatchpointRequest = erm
1.215 + .createModificationWatchpointRequest(field);
1.216 + modificationWatchpointRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
1.217 + modificationWatchpointRequest.setEnabled(true);
1.218 + }
1.219 +}
1.220 +
1.221 +class StreamRedirectThread extends Thread {
1.222 +
1.223 + private final BufferedReader in;
1.224 +
1.225 + private static final int BUFFER_SIZE = 2048;
1.226 +
1.227 + /**
1.228 + * Set up for copy.
1.229 + * @param name Name of the thread
1.230 + * @param in Stream to copy from
1.231 + * @param out Stream to copy to
1.232 + */
1.233 + StreamRedirectThread(String name, InputStream in) {
1.234 + super(name);
1.235 + this.in = new BufferedReader(new InputStreamReader(in));
1.236 + }
1.237 +
1.238 + /**
1.239 + * Copy.
1.240 + */
1.241 + public void run() {
1.242 + try {
1.243 + String line;
1.244 + while ((line = in.readLine ()) != null) {
1.245 + System.out.println ("testvm: " + line);
1.246 + }
1.247 + System.out.flush();
1.248 + } catch(IOException exc) {
1.249 + System.err.println("Child I/O Transfer - " + exc);
1.250 + }
1.251 + }
1.252 +}
