516 ClassLoaderDataGraph::always_strong_cld_do(follow_cld_closure());
517 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
518 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(mark_and_push_closure()));
519 }
520
521 // Flush marking stack.
522 follow_stack();
523
524 // Process reference objects found during marking
525 {
526 ref_processor()->setup_policy(clear_all_softrefs);
527 const ReferenceProcessorStats& stats =
528 ref_processor()->process_discovered_references(
529 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
530 gc_tracer()->report_gc_reference_stats(stats);
531 }
532
533 // This is the point where the entire marking should have completed.
534 assert(_marking_stack.is_empty(), "Marking should have completed");
535
536 // Unload classes and purge the SystemDictionary.
537 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
538
539 // Unload nmethods.
540 CodeCache::do_unloading(is_alive_closure(), purged_class);
541
542 // Prune dead klasses from subklass/sibling/implementor lists.
543 Klass::clean_weak_klass_links(is_alive_closure());
544
545 // Delete entries for dead interned strings.
546 StringTable::unlink(is_alive_closure());
547
548 // Clean up unreferenced symbols in symbol table.
549 SymbolTable::unlink();
550 _gc_tracer->report_object_count_after_gc(is_alive_closure());
551 }
552
553
554 void PSMarkSweep::mark_sweep_phase2() {
555 GCTraceTime(Trace, gc) tm("Phase 2: Compute new object addresses", _gc_timer);
556
557 // Now all live objects are marked, compute the new object addresses.
558
559 // It is not required that we traverse spaces in the same order in
560 // phase2, phase3 and phase4, but the ValidateMarkSweep live oops
561 // tracking expects us to do so. See comment under phase4.
562
563 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
564 PSOldGen* old_gen = heap->old_gen();
565
566 // Begin compacting into the old gen
567 PSMarkSweepDecorator::set_destination_decorator_tenured();
568
569 // This will also compact the young gen spaces.
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516 ClassLoaderDataGraph::always_strong_cld_do(follow_cld_closure());
517 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
518 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(mark_and_push_closure()));
519 }
520
521 // Flush marking stack.
522 follow_stack();
523
524 // Process reference objects found during marking
525 {
526 ref_processor()->setup_policy(clear_all_softrefs);
527 const ReferenceProcessorStats& stats =
528 ref_processor()->process_discovered_references(
529 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
530 gc_tracer()->report_gc_reference_stats(stats);
531 }
532
533 // This is the point where the entire marking should have completed.
534 assert(_marking_stack.is_empty(), "Marking should have completed");
535
536 {
537 GCTraceTime(Debug, gc) t("Class Unloading", _gc_timer);
538
539 // Unload classes and purge the SystemDictionary.
540 bool purged_class = SystemDictionary::do_unloading(is_alive_closure());
541
542 // Unload nmethods.
543 CodeCache::do_unloading(is_alive_closure(), purged_class);
544
545 // Prune dead klasses from subklass/sibling/implementor lists.
546 Klass::clean_weak_klass_links(is_alive_closure());
547 }
548
549 {
550 GCTraceTime(Debug, gc) t("Scrub String Table", _gc_timer);
551 // Delete entries for dead interned strings.
552 StringTable::unlink(is_alive_closure());
553 }
554
555 {
556 GCTraceTime(Debug, gc) t("Scrub Symbol Table", _gc_timer);
557 // Clean up unreferenced symbols in symbol table.
558 SymbolTable::unlink();
559 }
560
561 _gc_tracer->report_object_count_after_gc(is_alive_closure());
562 }
563
564
565 void PSMarkSweep::mark_sweep_phase2() {
566 GCTraceTime(Trace, gc) tm("Phase 2: Compute new object addresses", _gc_timer);
567
568 // Now all live objects are marked, compute the new object addresses.
569
570 // It is not required that we traverse spaces in the same order in
571 // phase2, phase3 and phase4, but the ValidateMarkSweep live oops
572 // tracking expects us to do so. See comment under phase4.
573
574 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
575 PSOldGen* old_gen = heap->old_gen();
576
577 // Begin compacting into the old gen
578 PSMarkSweepDecorator::set_destination_decorator_tenured();
579
580 // This will also compact the young gen spaces.
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