1184     // At least one nmethod has been marked for deoptimization

  1185     VM_Deoptimize op;

  1186     VMThread::execute(&op);

  1187   }

  1188 }

  1189 

  1190 // Flushes compiled methods dependent on a particular CallSite

  1191 // instance when its target is different than the given MethodHandle.

  1192 void Universe::flush_dependents_on(Handle call_site, Handle method_handle) {

  1193   assert_lock_strong(Compile_lock);

  1194 

  1195   if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;

  1196 

  1197   // CodeCache can only be updated by a thread_in_VM and they will all be

  1198   // stopped dring the safepoint so CodeCache will be safe to update without

  1199   // holding the CodeCache_lock.

  1200 

  1201   CallSiteDepChange changes(call_site(), method_handle());

  1202 

  1203   // Compute the dependent nmethods that have a reference to a

  1204   // CallSite object.  We use instanceKlass::mark_dependent_nmethod

  1205   // directly instead of CodeCache::mark_for_deoptimization because we

  1206   // want dependents on the class CallSite only not all classes in the

  1207   // ContextStream.

  1208   int marked = 0;

  1209   {

  1210     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

  1211     instanceKlass* call_site_klass = instanceKlass::cast(SystemDictionary::CallSite_klass());

  1212     marked = call_site_klass->mark_dependent_nmethods(changes);

  1213   }

  1214   if (marked > 0) {