415       PSKeepAliveClosure keep_alive(promotion_manager);
 416       PSEvacuateFollowersClosure evac_followers(promotion_manager);
 417       ReferenceProcessorStats stats;
 418       if (reference_processor()->processing_is_mt()) {
 419         PSRefProcTaskExecutor task_executor;
 420         stats = reference_processor()->process_discovered_references(
 421           &_is_alive_closure, &keep_alive, &evac_followers, &task_executor,
 422           &_gc_timer);
 423       } else {
 424         stats = reference_processor()->process_discovered_references(
 425           &_is_alive_closure, &keep_alive, &evac_followers, NULL, &_gc_timer);
 426       }
 427 
 428       _gc_tracer.report_gc_reference_stats(stats);
 429 
 430       // Enqueue reference objects discovered during scavenge.
 431       if (reference_processor()->processing_is_mt()) {
 432         PSRefProcTaskExecutor task_executor;
 433         reference_processor()->enqueue_discovered_references(&task_executor, &_gc_timer);
 434       } else {
 435         reference_processor()->enqueue_discovered_references(NULL);
 436       }
 437     }
 438 
 439     {
 440       GCTraceTime(Debug, gc, phases) tm("Scrub String Table", &_gc_timer);
 441       // Unlink any dead interned Strings and process the remaining live ones.
 442       PSScavengeRootsClosure root_closure(promotion_manager);
 443       StringTable::unlink_or_oops_do(&_is_alive_closure, &root_closure);
 444     }
 445 
 446     // Finally, flush the promotion_manager's labs, and deallocate its stacks.
 447     promotion_failure_occurred = PSPromotionManager::post_scavenge(_gc_tracer);
 448     if (promotion_failure_occurred) {
 449       clean_up_failed_promotion();
 450       log_info(gc, promotion)("Promotion failed");
 451     }
 452 
 453     _gc_tracer.report_tenuring_threshold(tenuring_threshold());
 454 
 455     // Let the size policy know we're done.  Note that we count promotion

 415       PSKeepAliveClosure keep_alive(promotion_manager);
 416       PSEvacuateFollowersClosure evac_followers(promotion_manager);
 417       ReferenceProcessorStats stats;
 418       if (reference_processor()->processing_is_mt()) {
 419         PSRefProcTaskExecutor task_executor;
 420         stats = reference_processor()->process_discovered_references(
 421           &_is_alive_closure, &keep_alive, &evac_followers, &task_executor,
 422           &_gc_timer);
 423       } else {
 424         stats = reference_processor()->process_discovered_references(
 425           &_is_alive_closure, &keep_alive, &evac_followers, NULL, &_gc_timer);
 426       }
 427 
 428       _gc_tracer.report_gc_reference_stats(stats);
 429 
 430       // Enqueue reference objects discovered during scavenge.
 431       if (reference_processor()->processing_is_mt()) {
 432         PSRefProcTaskExecutor task_executor;
 433         reference_processor()->enqueue_discovered_references(&task_executor, &_gc_timer);
 434       } else {
 435         reference_processor()->enqueue_discovered_references(NULL, &_gc_timer);
 436       }
 437     }
 438 
 439     {
 440       GCTraceTime(Debug, gc, phases) tm("Scrub String Table", &_gc_timer);
 441       // Unlink any dead interned Strings and process the remaining live ones.
 442       PSScavengeRootsClosure root_closure(promotion_manager);
 443       StringTable::unlink_or_oops_do(&_is_alive_closure, &root_closure);
 444     }
 445 
 446     // Finally, flush the promotion_manager's labs, and deallocate its stacks.
 447     promotion_failure_occurred = PSPromotionManager::post_scavenge(_gc_tracer);
 448     if (promotion_failure_occurred) {
 449       clean_up_failed_promotion();
 450       log_info(gc, promotion)("Promotion failed");
 451     }
 452 
 453     _gc_tracer.report_tenuring_threshold(tenuring_threshold());
 454 
 455     // Let the size policy know we're done.  Note that we count promotion