jdk8-mips64-public/hotspot: test/runtime/7158988/FieldMonitor.java@da0d652d0c2f (annotated)

test/runtime/7158988/FieldMonitor.java@da0d652d0c2f (annotated)

test/runtime/7158988/FieldMonitor.java

Thu, 20 Sep 2012 13:44:28 -0700

author: katleman
date: Thu, 20 Sep 2012 13:44:28 -0700
changeset 4035: da0d652d0c2f
parent 3698: 19e197e2a1af
child 4519: a7f9a1195d86
permissions: -rw-r--r--

Added tag jdk8-b57 for changeset d70102c4cb73

 /*
  * Copyright 2012 SAP AG.  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.
  */
 /*
  * @test FieldMonitor.java
  * @bug 7158988
  * @summary verify jvm does not crash while debugging
  * @run shell TestFieldMonitor.sh
  * @author axel.siebenborn@sap.com
  */
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import com.sun.jdi.Bootstrap;
 import com.sun.jdi.Field;
 import com.sun.jdi.ReferenceType;
 import com.sun.jdi.VirtualMachine;
 import com.sun.jdi.connect.Connector;
 import com.sun.jdi.connect.IllegalConnectorArgumentsException;
 import com.sun.jdi.connect.LaunchingConnector;
 import com.sun.jdi.connect.VMStartException;
 import com.sun.jdi.event.ClassPrepareEvent;
 import com.sun.jdi.event.Event;
 import com.sun.jdi.event.EventQueue;
 import com.sun.jdi.event.EventSet;
 import com.sun.jdi.event.ModificationWatchpointEvent;
 import com.sun.jdi.event.VMDeathEvent;
 import com.sun.jdi.event.VMDisconnectEvent;
 import com.sun.jdi.request.ClassPrepareRequest;
 import com.sun.jdi.request.EventRequest;
 import com.sun.jdi.request.EventRequestManager;
 import com.sun.jdi.request.ModificationWatchpointRequest;
 public class FieldMonitor {
   public static final String CLASS_NAME = "TestPostFieldModification";
   public static final String FIELD_NAME = "value";
   public static final String ARGUMENTS = "-Xshare:off -XX:+PrintGC";
   public static void main(String[] args)
       throws IOException, InterruptedException {
     StringBuffer sb = new StringBuffer();
     for (int i=0; i < args.length; i++) {
         sb.append(' ');
         sb.append(args[i]);
     }
     //VirtualMachine vm = launchTarget(sb.toString());
     VirtualMachine vm = launchTarget(CLASS_NAME);
     System.out.println("Vm launched");
     // set watch field on already loaded classes
     List<ReferenceType> referenceTypes = vm
         .classesByName(CLASS_NAME);
     for (ReferenceType refType : referenceTypes) {
       addFieldWatch(vm, refType);
     }
     // watch for loaded classes
     addClassWatch(vm);
     // process events
     EventQueue eventQueue = vm.eventQueue();
     // resume the vm
     Process process = vm.process();
     // Copy target's output and error to our output and error.
     Thread outThread = new StreamRedirectThread("out reader", process.getInputStream());
     Thread errThread = new StreamRedirectThread("error reader", process.getErrorStream());
     errThread.start();
     outThread.start();
     vm.resume();
     boolean connected = true;
     while (connected) {
       EventSet eventSet = eventQueue.remove();
       for (Event event : eventSet) {
         if (event instanceof VMDeathEvent
             || event instanceof VMDisconnectEvent) {
           // exit
           connected = false;
         } else if (event instanceof ClassPrepareEvent) {
           // watch field on loaded class
           System.out.println("ClassPrepareEvent");
           ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
           ReferenceType refType = classPrepEvent
               .referenceType();
           addFieldWatch(vm, refType);
         } else if (event instanceof ModificationWatchpointEvent) {
           System.out.println("sleep for 500 ms");
           Thread.sleep(500);
           System.out.println("resume...");
           ModificationWatchpointEvent modEvent = (ModificationWatchpointEvent) event;
           System.out.println("old="
               + modEvent.valueCurrent());
           System.out.println("new=" + modEvent.valueToBe());
           System.out.println();
         }
       }
       eventSet.resume();
     }
     // Shutdown begins when event thread terminates
     try {
         errThread.join(); // Make sure output is forwarded
         outThread.join();
     } catch (InterruptedException exc) {
         // we don't interrupt
     }
   }
   /**
    * Find a com.sun.jdi.CommandLineLaunch connector
    */
   static LaunchingConnector findLaunchingConnector() {
     List <Connector> connectors = Bootstrap.virtualMachineManager().allConnectors();
     Iterator <Connector> iter = connectors.iterator();
     while (iter.hasNext()) {
       Connector connector = iter.next();
       if (connector.name().equals("com.sun.jdi.CommandLineLaunch")) {
         return (LaunchingConnector)connector;
       }
     }
     throw new Error("No launching connector");
   }
   /**
    * Return the launching connector's arguments.
    */
  static Map <String,Connector.Argument> connectorArguments(LaunchingConnector connector, String mainArgs) {
       Map<String,Connector.Argument> arguments = connector.defaultArguments();
       for (String key : arguments.keySet()) {
         System.out.println(key);
       }
       Connector.Argument mainArg = (Connector.Argument)arguments.get("main");
       if (mainArg == null) {
           throw new Error("Bad launching connector");
       }
       mainArg.setValue(mainArgs);
       Connector.Argument optionsArg = (Connector.Argument)arguments.get("options");
       if (optionsArg == null) {
         throw new Error("Bad launching connector");
       }
       optionsArg.setValue(ARGUMENTS);
       return arguments;
   }
  static VirtualMachine launchTarget(String mainArgs) {
     LaunchingConnector connector = findLaunchingConnector();
     Map  arguments = connectorArguments(connector, mainArgs);
     try {
         return (VirtualMachine) connector.launch(arguments);
     } catch (IOException exc) {
         throw new Error("Unable to launch target VM: " + exc);
     } catch (IllegalConnectorArgumentsException exc) {
         throw new Error("Internal error: " + exc);
     } catch (VMStartException exc) {
         throw new Error("Target VM failed to initialize: " +
                         exc.getMessage());
     }
 }
   private static void addClassWatch(VirtualMachine vm) {
     EventRequestManager erm = vm.eventRequestManager();
     ClassPrepareRequest classPrepareRequest = erm
         .createClassPrepareRequest();
     classPrepareRequest.addClassFilter(CLASS_NAME);
     classPrepareRequest.setEnabled(true);
   }
   private static void addFieldWatch(VirtualMachine vm,
       ReferenceType refType) {
     EventRequestManager erm = vm.eventRequestManager();
     Field field = refType.fieldByName(FIELD_NAME);
     ModificationWatchpointRequest modificationWatchpointRequest = erm
         .createModificationWatchpointRequest(field);
     modificationWatchpointRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
     modificationWatchpointRequest.setEnabled(true);
   }
 }
 class StreamRedirectThread extends Thread {
   private final BufferedReader in;
   private static final int BUFFER_SIZE = 2048;
   /**
    * Set up for copy.
    * @param name  Name of the thread
    * @param in    Stream to copy from
    * @param out   Stream to copy to
    */
   StreamRedirectThread(String name, InputStream in) {
     super(name);
     this.in = new BufferedReader(new InputStreamReader(in));
   }
   /**
    * Copy.
    */
   public void run() {
     try {
       String line;
         while ((line = in.readLine ()) != null) {
           System.out.println ("testvm: " + line);
       }
      System.out.flush();
     } catch(IOException exc) {
       System.err.println("Child I/O Transfer - " + exc);
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/runtime/7158988/FieldMonitor.java@da0d652d0c2f (annotated)

test/runtime/7158988/FieldMonitor.java