173 }

   173 }

   174 

   174 

   175 void VM_RedefineClasses::doit() {

   175 void VM_RedefineClasses::doit() {

   176   Thread *thread = Thread::current();

   176   Thread *thread = Thread::current();

   177 

   177 

   178   if (UseSharedSpaces) {

   179   if (UseSharedSpaces) {

   179     // Sharing is enabled so we remap the shared readonly space to

   180     // Sharing is enabled so we remap the shared readonly space to

   180     // shared readwrite, private just in case we need to redefine

   181     // shared readwrite, private just in case we need to redefine

   181     // a shared class. We do the remap during the doit() phase of

   182     // a shared class. We do the remap during the doit() phase of

   182     // the safepoint to be safer.

   183     // the safepoint to be safer.

   184       log_info(redefine, class, load)("failed to remap shared readonly space to readwrite, private");

   185       log_info(redefine, class, load)("failed to remap shared readonly space to readwrite, private");

   185       _res = JVMTI_ERROR_INTERNAL;

   186       _res = JVMTI_ERROR_INTERNAL;

   186       return;

   187       return;

   187     }

   188     }

   188   }

   189   }

   189 

   191 

   190   // Mark methods seen on stack and everywhere else so old methods are not

   192   // Mark methods seen on stack and everywhere else so old methods are not

   191   // cleaned up if they're on the stack.

   193   // cleaned up if they're on the stack.

   192   MetadataOnStackMark md_on_stack(true);

   194   MetadataOnStackMark md_on_stack(true);

   193   HandleMark hm(thread);   // make sure any handles created are deleted

   195   HandleMark hm(thread);   // make sure any handles created are deleted