582 // In the future this should be moved into the generation's
583 // collect method so that ref discovery and enqueueing concerns
584 // are local to a generation. The collect method could return
585 // an appropriate indication in the case that notification on
586 // the ref lock was needed. This will make the treatment of
587 // weak refs more uniform (and indeed remove such concerns
588 // from GCH). XXX
589
590 HandleMark hm; // Discard invalid handles created during gc
591 save_marks(); // save marks for all gens
592 // We want to discover references, but not process them yet.
593 // This mode is disabled in process_discovered_references if the
594 // generation does some collection work, or in
595 // enqueue_discovered_references if the generation returns
596 // without doing any work.
597 ReferenceProcessor* rp = _gens[i]->ref_processor();
598 // If the discovery of ("weak") refs in this generation is
599 // atomic wrt other collectors in this configuration, we
600 // are guaranteed to have empty discovered ref lists.
601 if (rp->discovery_is_atomic()) {
602 rp->verify_no_references_recorded();
603 rp->enable_discovery();
604 rp->setup_policy(do_clear_all_soft_refs);
605 } else {
606 // collect() below will enable discovery as appropriate
607 }
608 _gens[i]->collect(full, do_clear_all_soft_refs, size, is_tlab);
609 if (!rp->enqueuing_is_done()) {
610 rp->enqueue_discovered_references();
611 } else {
612 rp->set_enqueuing_is_done(false);
613 }
614 rp->verify_no_references_recorded();
615 }
616 max_level_collected = i;
617
618 // Determine if allocation request was met.
619 if (size > 0) {
620 if (!is_tlab || _gens[i]->supports_tlab_allocation()) {
621 if (size*HeapWordSize <= _gens[i]->unsafe_max_alloc_nogc()) {
622 size = 0;
623 }
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582 // In the future this should be moved into the generation's
583 // collect method so that ref discovery and enqueueing concerns
584 // are local to a generation. The collect method could return
585 // an appropriate indication in the case that notification on
586 // the ref lock was needed. This will make the treatment of
587 // weak refs more uniform (and indeed remove such concerns
588 // from GCH). XXX
589
590 HandleMark hm; // Discard invalid handles created during gc
591 save_marks(); // save marks for all gens
592 // We want to discover references, but not process them yet.
593 // This mode is disabled in process_discovered_references if the
594 // generation does some collection work, or in
595 // enqueue_discovered_references if the generation returns
596 // without doing any work.
597 ReferenceProcessor* rp = _gens[i]->ref_processor();
598 // If the discovery of ("weak") refs in this generation is
599 // atomic wrt other collectors in this configuration, we
600 // are guaranteed to have empty discovered ref lists.
601 if (rp->discovery_is_atomic()) {
602 rp->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/);
603 rp->setup_policy(do_clear_all_soft_refs);
604 } else {
605 // collect() below will enable discovery as appropriate
606 }
607 _gens[i]->collect(full, do_clear_all_soft_refs, size, is_tlab);
608 if (!rp->enqueuing_is_done()) {
609 rp->enqueue_discovered_references();
610 } else {
611 rp->set_enqueuing_is_done(false);
612 }
613 rp->verify_no_references_recorded();
614 }
615 max_level_collected = i;
616
617 // Determine if allocation request was met.
618 if (size > 0) {
619 if (!is_tlab || _gens[i]->supports_tlab_allocation()) {
620 if (size*HeapWordSize <= _gens[i]->unsafe_max_alloc_nogc()) {
621 size = 0;
622 }
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