test/runtime/7158988/FieldMonitor.java

*** 32,48 ****
   */
  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;
--- 32,45 ----
   */
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
+ import java.io.PrintWriter;
  
  import com.sun.jdi.Bootstrap;
  import com.sun.jdi.Field;
  import com.sun.jdi.ReferenceType;
  import com.sun.jdi.VirtualMachine;
*** 69,85 ****
    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
--- 66,75 ----
*** 99,108 ****
--- 89,100 ----
  
      // 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());
      
+     PrintWriter vmPrinter = null;
+     
      errThread.start();
      outThread.start();
  
  
      vm.resume();
*** 119,128 ****
--- 111,127 ----
            System.out.println("ClassPrepareEvent");
            ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
            ReferenceType refType = classPrepEvent
                .referenceType();
            addFieldWatch(vm, refType);
+           
+           // inform TestPostFieldModification that it can exit. // JDK-8007710
+           if (vmPrinter == null) {
+               vmPrinter = new PrintWriter(process.getOutputStream());
+               vmPrinter.println("");
+               vmPrinter.flush();
+           }        
          } else if (event instanceof ModificationWatchpointEvent) {
            System.out.println("sleep for 500 ms");
            Thread.sleep(500);
            System.out.println("resume...");