31 #include "gc/parallel/psAdaptiveSizePolicy.hpp"
32 #include "gc/parallel/psMarkSweep.hpp"
33 #include "gc/parallel/psMarkSweepDecorator.hpp"
34 #include "gc/parallel/psOldGen.hpp"
35 #include "gc/parallel/psScavenge.hpp"
36 #include "gc/parallel/psYoungGen.hpp"
37 #include "gc/serial/markSweep.hpp"
38 #include "gc/shared/gcCause.hpp"
39 #include "gc/shared/gcHeapSummary.hpp"
40 #include "gc/shared/gcId.hpp"
41 #include "gc/shared/gcLocker.inline.hpp"
42 #include "gc/shared/gcTimer.hpp"
43 #include "gc/shared/gcTrace.hpp"
44 #include "gc/shared/gcTraceTime.inline.hpp"
45 #include "gc/shared/isGCActiveMark.hpp"
46 #include "gc/shared/referencePolicy.hpp"
47 #include "gc/shared/referenceProcessor.hpp"
48 #include "gc/shared/spaceDecorator.hpp"
49 #include "logging/log.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "runtime/biasedLocking.hpp"
52 #include "runtime/fprofiler.hpp"
53 #include "runtime/safepoint.hpp"
54 #include "runtime/vmThread.hpp"
55 #include "services/management.hpp"
56 #include "services/memoryService.hpp"
57 #include "utilities/events.hpp"
58 #include "utilities/stack.inline.hpp"
59
60 elapsedTimer PSMarkSweep::_accumulated_time;
61 jlong PSMarkSweep::_time_of_last_gc = 0;
62 CollectorCounters* PSMarkSweep::_counters = NULL;
63
64 void PSMarkSweep::initialize() {
65 MemRegion mr = ParallelScavengeHeap::heap()->reserved_region();
66 set_ref_processor(new ReferenceProcessor(mr)); // a vanilla ref proc
67 _counters = new CollectorCounters("PSMarkSweep", 1);
68 }
69
70 // This method contains all heap specific policy for invoking mark sweep.
498 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
499
500 // Need to clear claim bits before the tracing starts.
501 ClassLoaderDataGraph::clear_claimed_marks();
502
503 // General strong roots.
504 {
505 ParallelScavengeHeap::ParStrongRootsScope psrs;
506 Universe::oops_do(mark_and_push_closure());
507 JNIHandles::oops_do(mark_and_push_closure()); // Global (strong) JNI handles
508 MarkingCodeBlobClosure each_active_code_blob(mark_and_push_closure(), !CodeBlobToOopClosure::FixRelocations);
509 Threads::oops_do(mark_and_push_closure(), &each_active_code_blob);
510 ObjectSynchronizer::oops_do(mark_and_push_closure());
511 FlatProfiler::oops_do(mark_and_push_closure());
512 Management::oops_do(mark_and_push_closure());
513 JvmtiExport::oops_do(mark_and_push_closure());
514 SystemDictionary::always_strong_oops_do(mark_and_push_closure());
515 ClassLoaderDataGraph::always_strong_cld_do(follow_cld_closure());
516 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
517 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(mark_and_push_closure()));
518 }
519
520 // Flush marking stack.
521 follow_stack();
522
523 // Process reference objects found during marking
524 {
525 GCTraceTime(Debug, gc, phases) t("Reference Processing", _gc_timer);
526
527 ref_processor()->setup_policy(clear_all_softrefs);
528 const ReferenceProcessorStats& stats =
529 ref_processor()->process_discovered_references(
530 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
531 gc_tracer()->report_gc_reference_stats(stats);
532 }
533
534 // This is the point where the entire marking should have completed.
535 assert(_marking_stack.is_empty(), "Marking should have completed");
536
537 {
594 ClassLoaderDataGraph::clear_claimed_marks();
595
596 // General strong roots.
597 Universe::oops_do(adjust_pointer_closure());
598 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
599 Threads::oops_do(adjust_pointer_closure(), NULL);
600 ObjectSynchronizer::oops_do(adjust_pointer_closure());
601 FlatProfiler::oops_do(adjust_pointer_closure());
602 Management::oops_do(adjust_pointer_closure());
603 JvmtiExport::oops_do(adjust_pointer_closure());
604 SystemDictionary::oops_do(adjust_pointer_closure());
605 ClassLoaderDataGraph::cld_do(adjust_cld_closure());
606
607 // Now adjust pointers in remaining weak roots. (All of which should
608 // have been cleared if they pointed to non-surviving objects.)
609 // Global (weak) JNI handles
610 JNIHandles::weak_oops_do(adjust_pointer_closure());
611
612 CodeBlobToOopClosure adjust_from_blobs(adjust_pointer_closure(), CodeBlobToOopClosure::FixRelocations);
613 CodeCache::blobs_do(&adjust_from_blobs);
614 StringTable::oops_do(adjust_pointer_closure());
615 ref_processor()->weak_oops_do(adjust_pointer_closure());
616 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
617
618 adjust_marks();
619
620 young_gen->adjust_pointers();
621 old_gen->adjust_pointers();
622 }
623
624 void PSMarkSweep::mark_sweep_phase4() {
625 EventMark m("4 compact heap");
626 GCTraceTime(Info, gc, phases) tm("Phase 4: Move objects", _gc_timer);
627
628 // All pointers are now adjusted, move objects accordingly
629
630 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
631 PSYoungGen* young_gen = heap->young_gen();
632 PSOldGen* old_gen = heap->old_gen();
633
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31 #include "gc/parallel/psAdaptiveSizePolicy.hpp"
32 #include "gc/parallel/psMarkSweep.hpp"
33 #include "gc/parallel/psMarkSweepDecorator.hpp"
34 #include "gc/parallel/psOldGen.hpp"
35 #include "gc/parallel/psScavenge.hpp"
36 #include "gc/parallel/psYoungGen.hpp"
37 #include "gc/serial/markSweep.hpp"
38 #include "gc/shared/gcCause.hpp"
39 #include "gc/shared/gcHeapSummary.hpp"
40 #include "gc/shared/gcId.hpp"
41 #include "gc/shared/gcLocker.inline.hpp"
42 #include "gc/shared/gcTimer.hpp"
43 #include "gc/shared/gcTrace.hpp"
44 #include "gc/shared/gcTraceTime.inline.hpp"
45 #include "gc/shared/isGCActiveMark.hpp"
46 #include "gc/shared/referencePolicy.hpp"
47 #include "gc/shared/referenceProcessor.hpp"
48 #include "gc/shared/spaceDecorator.hpp"
49 #include "logging/log.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "aot/aotLoader.hpp"
52 #include "runtime/biasedLocking.hpp"
53 #include "runtime/fprofiler.hpp"
54 #include "runtime/safepoint.hpp"
55 #include "runtime/vmThread.hpp"
56 #include "services/management.hpp"
57 #include "services/memoryService.hpp"
58 #include "utilities/events.hpp"
59 #include "utilities/stack.inline.hpp"
60
61 elapsedTimer PSMarkSweep::_accumulated_time;
62 jlong PSMarkSweep::_time_of_last_gc = 0;
63 CollectorCounters* PSMarkSweep::_counters = NULL;
64
65 void PSMarkSweep::initialize() {
66 MemRegion mr = ParallelScavengeHeap::heap()->reserved_region();
67 set_ref_processor(new ReferenceProcessor(mr)); // a vanilla ref proc
68 _counters = new CollectorCounters("PSMarkSweep", 1);
69 }
70
71 // This method contains all heap specific policy for invoking mark sweep.
499 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
500
501 // Need to clear claim bits before the tracing starts.
502 ClassLoaderDataGraph::clear_claimed_marks();
503
504 // General strong roots.
505 {
506 ParallelScavengeHeap::ParStrongRootsScope psrs;
507 Universe::oops_do(mark_and_push_closure());
508 JNIHandles::oops_do(mark_and_push_closure()); // Global (strong) JNI handles
509 MarkingCodeBlobClosure each_active_code_blob(mark_and_push_closure(), !CodeBlobToOopClosure::FixRelocations);
510 Threads::oops_do(mark_and_push_closure(), &each_active_code_blob);
511 ObjectSynchronizer::oops_do(mark_and_push_closure());
512 FlatProfiler::oops_do(mark_and_push_closure());
513 Management::oops_do(mark_and_push_closure());
514 JvmtiExport::oops_do(mark_and_push_closure());
515 SystemDictionary::always_strong_oops_do(mark_and_push_closure());
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 if (UseAOT) {
520 AOTLoader::oops_do(mark_and_push_closure());
521 }
522 }
523
524 // Flush marking stack.
525 follow_stack();
526
527 // Process reference objects found during marking
528 {
529 GCTraceTime(Debug, gc, phases) t("Reference Processing", _gc_timer);
530
531 ref_processor()->setup_policy(clear_all_softrefs);
532 const ReferenceProcessorStats& stats =
533 ref_processor()->process_discovered_references(
534 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
535 gc_tracer()->report_gc_reference_stats(stats);
536 }
537
538 // This is the point where the entire marking should have completed.
539 assert(_marking_stack.is_empty(), "Marking should have completed");
540
541 {
598 ClassLoaderDataGraph::clear_claimed_marks();
599
600 // General strong roots.
601 Universe::oops_do(adjust_pointer_closure());
602 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
603 Threads::oops_do(adjust_pointer_closure(), NULL);
604 ObjectSynchronizer::oops_do(adjust_pointer_closure());
605 FlatProfiler::oops_do(adjust_pointer_closure());
606 Management::oops_do(adjust_pointer_closure());
607 JvmtiExport::oops_do(adjust_pointer_closure());
608 SystemDictionary::oops_do(adjust_pointer_closure());
609 ClassLoaderDataGraph::cld_do(adjust_cld_closure());
610
611 // Now adjust pointers in remaining weak roots. (All of which should
612 // have been cleared if they pointed to non-surviving objects.)
613 // Global (weak) JNI handles
614 JNIHandles::weak_oops_do(adjust_pointer_closure());
615
616 CodeBlobToOopClosure adjust_from_blobs(adjust_pointer_closure(), CodeBlobToOopClosure::FixRelocations);
617 CodeCache::blobs_do(&adjust_from_blobs);
618 if (UseAOT) {
619 AOTLoader::oops_do(adjust_pointer_closure());
620 }
621 StringTable::oops_do(adjust_pointer_closure());
622 ref_processor()->weak_oops_do(adjust_pointer_closure());
623 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
624
625 adjust_marks();
626
627 young_gen->adjust_pointers();
628 old_gen->adjust_pointers();
629 }
630
631 void PSMarkSweep::mark_sweep_phase4() {
632 EventMark m("4 compact heap");
633 GCTraceTime(Info, gc, phases) tm("Phase 4: Move objects", _gc_timer);
634
635 // All pointers are now adjusted, move objects accordingly
636
637 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
638 PSYoungGen* young_gen = heap->young_gen();
639 PSOldGen* old_gen = heap->old_gen();
640
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