246         }
 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         }
 293         throw re;

 246         }
 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 
 268     // we reflectively use newly spec'ed class because our ALT_BOOTDIR
 269     // is 1.4.2 and not 1.5.
 270     private static Class vmCannotBeModifiedExceptionClass = null;
 271     void throwNotReadOnlyException(String operation) {
 272         RuntimeException re = null;
 273         if (vmCannotBeModifiedExceptionClass == null) {
 274             try {
 275                 vmCannotBeModifiedExceptionClass = Class.forName("com.sun.jdi.VMCannotBeModifiedException");
 276             } catch (ClassNotFoundException cnfe) {
 277                 vmCannotBeModifiedExceptionClass = UnsupportedOperationException.class;
 278             }
 279         }
 280         try {
 281             re = (RuntimeException) vmCannotBeModifiedExceptionClass.newInstance();
 282         } catch (Exception exp) {
 283             re = new RuntimeException(exp.getMessage());
 284         }
 285         throw re;