412       GCTraceTime(Debug, gc, phases) tm("Reference Processing", &_gc_timer);
 413 
 414       reference_processor()->setup_policy(false); // not always_clear
 415       reference_processor()->set_active_mt_degree(active_workers);
 416       PSKeepAliveClosure keep_alive(promotion_manager);
 417       PSEvacuateFollowersClosure evac_followers(promotion_manager);
 418       ReferenceProcessorStats stats;
 419       ReferenceProcessorPhaseTimes pt(&_gc_timer, reference_processor()->num_queues());
 420       if (reference_processor()->processing_is_mt()) {
 421         PSRefProcTaskExecutor task_executor;
 422         stats = reference_processor()->process_discovered_references(
 423           &_is_alive_closure, &keep_alive, &evac_followers, &task_executor,
 424           &pt);
 425       } else {
 426         stats = reference_processor()->process_discovered_references(
 427           &_is_alive_closure, &keep_alive, &evac_followers, NULL, &pt);
 428       }
 429 
 430       _gc_tracer.report_gc_reference_stats(stats);
 431       pt.print_all_references();
 432 
 433       // Enqueue reference objects discovered during scavenge.
 434       if (reference_processor()->processing_is_mt()) {
 435         PSRefProcTaskExecutor task_executor;
 436         reference_processor()->enqueue_discovered_references(&task_executor, &pt);
 437       } else {
 438         reference_processor()->enqueue_discovered_references(NULL, &pt);
 439       }
 440 
 441       pt.print_enqueue_phase();
 442     }
 443 
 444     assert(promotion_manager->stacks_empty(),"stacks should be empty at this point");
 445 
 446     PSScavengeRootsClosure root_closure(promotion_manager);
 447 
 448     {
 449       GCTraceTime(Debug, gc, phases) tm("Weak Processing", &_gc_timer);
 450       WeakProcessor::weak_oops_do(&_is_alive_closure, &root_closure);
 451     }
 452 
 453     {
 454       GCTraceTime(Debug, gc, phases) tm("Scrub String Table", &_gc_timer);
 455       // Unlink any dead interned Strings and process the remaining live ones.
 456       StringTable::unlink_or_oops_do(&_is_alive_closure, &root_closure);
 457     }
 458 
 459     // Verify that usage of root_closure didn't copy any objects.
 460     assert(promotion_manager->stacks_empty(),"stacks should be empty at this point");
 461 

 412       GCTraceTime(Debug, gc, phases) tm("Reference Processing", &_gc_timer);
 413 
 414       reference_processor()->setup_policy(false); // not always_clear
 415       reference_processor()->set_active_mt_degree(active_workers);
 416       PSKeepAliveClosure keep_alive(promotion_manager);
 417       PSEvacuateFollowersClosure evac_followers(promotion_manager);
 418       ReferenceProcessorStats stats;
 419       ReferenceProcessorPhaseTimes pt(&_gc_timer, reference_processor()->num_queues());
 420       if (reference_processor()->processing_is_mt()) {
 421         PSRefProcTaskExecutor task_executor;
 422         stats = reference_processor()->process_discovered_references(
 423           &_is_alive_closure, &keep_alive, &evac_followers, &task_executor,
 424           &pt);
 425       } else {
 426         stats = reference_processor()->process_discovered_references(
 427           &_is_alive_closure, &keep_alive, &evac_followers, NULL, &pt);
 428       }
 429 
 430       _gc_tracer.report_gc_reference_stats(stats);
 431       pt.print_all_references();










 432     }
 433 
 434     assert(promotion_manager->stacks_empty(),"stacks should be empty at this point");
 435 
 436     PSScavengeRootsClosure root_closure(promotion_manager);
 437 
 438     {
 439       GCTraceTime(Debug, gc, phases) tm("Weak Processing", &_gc_timer);
 440       WeakProcessor::weak_oops_do(&_is_alive_closure, &root_closure);
 441     }
 442 
 443     {
 444       GCTraceTime(Debug, gc, phases) tm("Scrub String Table", &_gc_timer);
 445       // Unlink any dead interned Strings and process the remaining live ones.
 446       StringTable::unlink_or_oops_do(&_is_alive_closure, &root_closure);
 447     }
 448 
 449     // Verify that usage of root_closure didn't copy any objects.
 450     assert(promotion_manager->stacks_empty(),"stacks should be empty at this point");
 451