src/hotspot/share/runtime/safepoint.cpp

*** 101,111 ****
  
    assert( _state == _not_synchronized, "trying to safepoint synchronize with wrong state");
  
    int nof_threads = Threads::number_of_threads();
  
!   log_debug(safepoint)("Safepoint synchronization initiated. (%d)", nof_threads);
  
    RuntimeService::record_safepoint_begin();
  
    MutexLocker mu(Safepoint_lock);
  
--- 101,111 ----
  
    assert( _state == _not_synchronized, "trying to safepoint synchronize with wrong state");
  
    int nof_threads = Threads::number_of_threads();
  
!   log_debug(safepoint)("Safepoint synchronization initiated. (%d threads)", nof_threads);
  
    RuntimeService::record_safepoint_begin();
  
    MutexLocker mu(Safepoint_lock);
  
*** 405,417 ****
  #endif // ASSERT
  
    // Update the count of active JNI critical regions
    GCLocker::set_jni_lock_count(_current_jni_active_count);
  
!   if (log_is_enabled(Debug, safepoint)) {
!     log_debug(safepoint)("Entering safepoint region: %s", VMThread::vm_safepoint_description());
!   }
  
    RuntimeService::record_safepoint_synchronized();
    if (PrintSafepointStatistics) {
      update_statistics_on_sync_end(os::javaTimeNanos());
    }
--- 405,415 ----
  #endif // ASSERT
  
    // Update the count of active JNI critical regions
    GCLocker::set_jni_lock_count(_current_jni_active_count);
  
!   log_info(safepoint)("Entering safepoint region: %s", VMThread::vm_safepoint_description());
  
    RuntimeService::record_safepoint_synchronized();
    if (PrintSafepointStatistics) {
      update_statistics_on_sync_end(os::javaTimeNanos());
    }
*** 494,511 ****
          for (; JavaThread *current = jtiwh.next(); ) {
            ThreadSafepointState* cur_state = current->safepoint_state();
            cur_state->restart(); // TSS _running
            SafepointMechanism::disarm_local_poll(current); // release store, local state -> polling page
          }
!         log_debug(safepoint)("Leaving safepoint region");
        } else {
          // Set to not synchronized, so the threads will not go into the signal_thread_blocked method
          // when they get restarted.
          _state = _not_synchronized;
          OrderAccess::fence();
  
!         log_debug(safepoint)("Leaving safepoint region");
  
          // Start suspended threads
          jtiwh.rewind();
          for (; JavaThread *current = jtiwh.next(); ) {
            // A problem occurring on Solaris is when attempting to restart threads
--- 492,509 ----
          for (; JavaThread *current = jtiwh.next(); ) {
            ThreadSafepointState* cur_state = current->safepoint_state();
            cur_state->restart(); // TSS _running
            SafepointMechanism::disarm_local_poll(current); // release store, local state -> polling page
          }
!         log_info(safepoint)("Leaving safepoint region");
        } else {
          // Set to not synchronized, so the threads will not go into the signal_thread_blocked method
          // when they get restarted.
          _state = _not_synchronized;
          OrderAccess::fence();
  
!         log_info(safepoint)("Leaving safepoint region");
  
          // Start suspended threads
          jtiwh.rewind();
          for (; JavaThread *current = jtiwh.next(); ) {
            // A problem occurring on Solaris is when attempting to restart threads