src/hotspot/share/runtime/serviceThread.cpp

rev 50373 : 8195097: Make it possible to process StringTable outside safepoint
Reviewed-by:

*** 21,30 ****
--- 21,31 ----
   * questions.
   *
   */
  
  #include "precompiled.hpp"
+ #include "classfile/stringTable.hpp"
  #include "runtime/interfaceSupport.inline.hpp"
  #include "runtime/javaCalls.hpp"
  #include "runtime/serviceThread.hpp"
  #include "runtime/mutexLocker.hpp"
  #include "runtime/os.hpp"
*** 80,89 ****
--- 81,91 ----
      bool sensors_changed = false;
      bool has_jvmti_events = false;
      bool has_gc_notification_event = false;
      bool has_dcmd_notification_event = false;
      bool acs_notify = false;
+     bool stringtable_work = false;
      JvmtiDeferredEvent jvmti_event;
      {
        // Need state transition ThreadBlockInVM so that this thread
        // will be handled by safepoint correctly when this thread is
        // notified at a safepoint.
*** 96,116 ****
  
        MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
        while (!(sensors_changed = LowMemoryDetector::has_pending_requests()) &&
               !(has_jvmti_events = JvmtiDeferredEventQueue::has_events()) &&
                !(has_gc_notification_event = GCNotifier::has_event()) &&
!               !(has_dcmd_notification_event = DCmdFactory::has_pending_jmx_notification())) {
          // wait until one of the sensors has pending requests, or there is a
          // pending JVMTI event or JMX GC notification to post
          Service_lock->wait(Mutex::_no_safepoint_check_flag);
        }
  
        if (has_jvmti_events) {
          jvmti_event = JvmtiDeferredEventQueue::dequeue();
        }
      }
  
      if (has_jvmti_events) {
        jvmti_event.post();
      }
  
      if (sensors_changed) {
--- 98,123 ----
  
        MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
        while (!(sensors_changed = LowMemoryDetector::has_pending_requests()) &&
               !(has_jvmti_events = JvmtiDeferredEventQueue::has_events()) &&
                !(has_gc_notification_event = GCNotifier::has_event()) &&
!               !(has_dcmd_notification_event = DCmdFactory::has_pending_jmx_notification()) &&
!               !(stringtable_work = StringTable::has_work())) {
          // wait until one of the sensors has pending requests, or there is a
          // pending JVMTI event or JMX GC notification to post
          Service_lock->wait(Mutex::_no_safepoint_check_flag);
        }
  
        if (has_jvmti_events) {
          jvmti_event = JvmtiDeferredEventQueue::dequeue();
        }
      }
  
+     if (stringtable_work) {
+       StringTable::do_concurrent_work(jt);
+     }
+ 
      if (has_jvmti_events) {
        jvmti_event.post();
      }
  
      if (sensors_changed) {