247         return myvm;
 248     }
 249 
 250 
 251     VirtualMachineImpl(VirtualMachineManager mgr, int sequenceNumber)
 252         throws Exception {
 253         super(null);  // Can't use super(this)
 254         vm = this;
 255 
 256         this.sequenceNumber = sequenceNumber;
 257         this.vmmgr = mgr;
 258 
 259         /* Create ThreadGroup to be used by all threads servicing
 260          * this VM.
 261          */
 262         threadGroupForJDI = new ThreadGroup("JDI [" +
 263                                             this.hashCode() + "]");
 264 
 265         ((com.sun.tools.jdi.VirtualMachineManagerImpl)mgr).addVirtualMachine(this);
 266 
 267         // By default SA agent classes prefer dbx debugger to proc debugger
 268         // and Windows process debugger to windbg debugger. SA expects
 269         // special properties to be set to choose other debuggers. We will set
 270         // those here before attaching to SA agent.
 271 
 272         System.setProperty("sun.jvm.hotspot.debugger.useProcDebugger", "true");
 273         System.setProperty("sun.jvm.hotspot.debugger.useWindbgDebugger", "true");
 274     }
 275 
 276     // we reflectively use newly spec'ed class because our ALT_BOOTDIR
 277     // is 1.4.2 and not 1.5.
 278     private static Class vmCannotBeModifiedExceptionClass = null;
 279     void throwNotReadOnlyException(String operation) {
 280         RuntimeException re = null;
 281         if (vmCannotBeModifiedExceptionClass == null) {
 282             try {
 283                 vmCannotBeModifiedExceptionClass = Class.forName("com.sun.jdi.VMCannotBeModifiedException");
 284             } catch (ClassNotFoundException cnfe) {
 285                 vmCannotBeModifiedExceptionClass = UnsupportedOperationException.class;
 286             }
 287         }
 288         try {
 289             re = (RuntimeException) vmCannotBeModifiedExceptionClass.newInstance();
 290         } catch (Exception exp) {
 291             re = new RuntimeException(exp.getMessage());
 292         }

 247         return myvm;
 248     }
 249 
 250 
 251     VirtualMachineImpl(VirtualMachineManager mgr, int sequenceNumber)
 252         throws Exception {
 253         super(null);  // Can't use super(this)
 254         vm = this;
 255 
 256         this.sequenceNumber = sequenceNumber;
 257         this.vmmgr = mgr;
 258 
 259         /* Create ThreadGroup to be used by all threads servicing
 260          * this VM.
 261          */
 262         threadGroupForJDI = new ThreadGroup("JDI [" +
 263                                             this.hashCode() + "]");
 264 
 265         ((com.sun.tools.jdi.VirtualMachineManagerImpl)mgr).addVirtualMachine(this);
 266 
 267         // By default SA agent classes prefer Windows process debugger
 268         // to windbg debugger. SA expects special properties to be set
 269         // to choose other debuggers. We will set those here before
 270         // attaching to SA agent.
 271 

 272         System.setProperty("sun.jvm.hotspot.debugger.useWindbgDebugger", "true");
 273     }
 274 
 275     // we reflectively use newly spec'ed class because our ALT_BOOTDIR
 276     // is 1.4.2 and not 1.5.
 277     private static Class vmCannotBeModifiedExceptionClass = null;
 278     void throwNotReadOnlyException(String operation) {
 279         RuntimeException re = null;
 280         if (vmCannotBeModifiedExceptionClass == null) {
 281             try {
 282                 vmCannotBeModifiedExceptionClass = Class.forName("com.sun.jdi.VMCannotBeModifiedException");
 283             } catch (ClassNotFoundException cnfe) {
 284                 vmCannotBeModifiedExceptionClass = UnsupportedOperationException.class;
 285             }
 286         }
 287         try {
 288             re = (RuntimeException) vmCannotBeModifiedExceptionClass.newInstance();
 289         } catch (Exception exp) {
 290             re = new RuntimeException(exp.getMessage());
 291         }