33 #include "gc/parallel/psMarkSweep.hpp"
34 #include "gc/parallel/psMarkSweepDecorator.hpp"
35 #include "gc/parallel/psOldGen.hpp"
36 #include "gc/parallel/psScavenge.hpp"
37 #include "gc/parallel/psYoungGen.hpp"
38 #include "gc/serial/markSweep.hpp"
39 #include "gc/shared/gcCause.hpp"
40 #include "gc/shared/gcHeapSummary.hpp"
41 #include "gc/shared/gcId.hpp"
42 #include "gc/shared/gcLocker.inline.hpp"
43 #include "gc/shared/gcTimer.hpp"
44 #include "gc/shared/gcTrace.hpp"
45 #include "gc/shared/gcTraceTime.inline.hpp"
46 #include "gc/shared/isGCActiveMark.hpp"
47 #include "gc/shared/referencePolicy.hpp"
48 #include "gc/shared/referenceProcessor.hpp"
49 #include "gc/shared/spaceDecorator.hpp"
50 #include "logging/log.hpp"
51 #include "oops/oop.inline.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/align.hpp"
59 #include "utilities/events.hpp"
60 #include "utilities/stack.inline.hpp"
61
62 elapsedTimer PSMarkSweep::_accumulated_time;
63 jlong PSMarkSweep::_time_of_last_gc = 0;
64 CollectorCounters* PSMarkSweep::_counters = NULL;
65
66 void PSMarkSweep::initialize() {
67 MemRegion mr = ParallelScavengeHeap::heap()->reserved_region();
68 set_ref_processor(new ReferenceProcessor(mr)); // a vanilla ref proc
69 _counters = new CollectorCounters("PSMarkSweep", 1);
70 }
71
72 // This method contains all heap specific policy for invoking mark sweep.
73 // PSMarkSweep::invoke_no_policy() will only attempt to mark-sweep-compact
493 _objarray_stack.clear(true);
494 }
495
496 void PSMarkSweep::mark_sweep_phase1(bool clear_all_softrefs) {
497 // Recursively traverse all live objects and mark them
498 GCTraceTime(Info, gc, phases) tm("Phase 1: Mark live objects", _gc_timer);
499
500 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
501
502 // Need to clear claim bits before the tracing starts.
503 ClassLoaderDataGraph::clear_claimed_marks();
504
505 // General strong roots.
506 {
507 ParallelScavengeHeap::ParStrongRootsScope psrs;
508 Universe::oops_do(mark_and_push_closure());
509 JNIHandles::oops_do(mark_and_push_closure()); // Global (strong) JNI handles
510 MarkingCodeBlobClosure each_active_code_blob(mark_and_push_closure(), !CodeBlobToOopClosure::FixRelocations);
511 Threads::oops_do(mark_and_push_closure(), &each_active_code_blob);
512 ObjectSynchronizer::oops_do(mark_and_push_closure());
513 FlatProfiler::oops_do(mark_and_push_closure());
514 Management::oops_do(mark_and_push_closure());
515 JvmtiExport::oops_do(mark_and_push_closure());
516 SystemDictionary::always_strong_oops_do(mark_and_push_closure());
517 ClassLoaderDataGraph::always_strong_cld_do(follow_cld_closure());
518 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
519 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(mark_and_push_closure()));
520 AOTLoader::oops_do(mark_and_push_closure());
521 }
522
523 // Flush marking stack.
524 follow_stack();
525
526 // Process reference objects found during marking
527 {
528 GCTraceTime(Debug, gc, phases) t("Reference Processing", _gc_timer);
529
530 ref_processor()->setup_policy(clear_all_softrefs);
531 const ReferenceProcessorStats& stats =
532 ref_processor()->process_discovered_references(
533 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
584 // This will also compact the young gen spaces.
585 old_gen->precompact();
586 }
587
588 void PSMarkSweep::mark_sweep_phase3() {
589 // Adjust the pointers to reflect the new locations
590 GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", _gc_timer);
591
592 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
593 PSYoungGen* young_gen = heap->young_gen();
594 PSOldGen* old_gen = heap->old_gen();
595
596 // Need to clear claim bits before the tracing starts.
597 ClassLoaderDataGraph::clear_claimed_marks();
598
599 // General strong roots.
600 Universe::oops_do(adjust_pointer_closure());
601 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
602 Threads::oops_do(adjust_pointer_closure(), NULL);
603 ObjectSynchronizer::oops_do(adjust_pointer_closure());
604 FlatProfiler::oops_do(adjust_pointer_closure());
605 Management::oops_do(adjust_pointer_closure());
606 JvmtiExport::oops_do(adjust_pointer_closure());
607 SystemDictionary::oops_do(adjust_pointer_closure());
608 ClassLoaderDataGraph::cld_do(adjust_cld_closure());
609
610 // Now adjust pointers in remaining weak roots. (All of which should
611 // have been cleared if they pointed to non-surviving objects.)
612 // Global (weak) JNI handles
613 JNIHandles::weak_oops_do(adjust_pointer_closure());
614
615 CodeBlobToOopClosure adjust_from_blobs(adjust_pointer_closure(), CodeBlobToOopClosure::FixRelocations);
616 CodeCache::blobs_do(&adjust_from_blobs);
617 AOTLoader::oops_do(adjust_pointer_closure());
618 StringTable::oops_do(adjust_pointer_closure());
619 ref_processor()->weak_oops_do(adjust_pointer_closure());
620 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
621
622 adjust_marks();
623
624 young_gen->adjust_pointers();
|
33 #include "gc/parallel/psMarkSweep.hpp"
34 #include "gc/parallel/psMarkSweepDecorator.hpp"
35 #include "gc/parallel/psOldGen.hpp"
36 #include "gc/parallel/psScavenge.hpp"
37 #include "gc/parallel/psYoungGen.hpp"
38 #include "gc/serial/markSweep.hpp"
39 #include "gc/shared/gcCause.hpp"
40 #include "gc/shared/gcHeapSummary.hpp"
41 #include "gc/shared/gcId.hpp"
42 #include "gc/shared/gcLocker.inline.hpp"
43 #include "gc/shared/gcTimer.hpp"
44 #include "gc/shared/gcTrace.hpp"
45 #include "gc/shared/gcTraceTime.inline.hpp"
46 #include "gc/shared/isGCActiveMark.hpp"
47 #include "gc/shared/referencePolicy.hpp"
48 #include "gc/shared/referenceProcessor.hpp"
49 #include "gc/shared/spaceDecorator.hpp"
50 #include "logging/log.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "runtime/biasedLocking.hpp"
53 #include "runtime/safepoint.hpp"
54 #include "runtime/vmThread.hpp"
55 #include "services/management.hpp"
56 #include "services/memoryService.hpp"
57 #include "utilities/align.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.
72 // PSMarkSweep::invoke_no_policy() will only attempt to mark-sweep-compact
492 _objarray_stack.clear(true);
493 }
494
495 void PSMarkSweep::mark_sweep_phase1(bool clear_all_softrefs) {
496 // Recursively traverse all live objects and mark them
497 GCTraceTime(Info, gc, phases) tm("Phase 1: Mark live objects", _gc_timer);
498
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 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 AOTLoader::oops_do(mark_and_push_closure());
519 }
520
521 // Flush marking stack.
522 follow_stack();
523
524 // Process reference objects found during marking
525 {
526 GCTraceTime(Debug, gc, phases) t("Reference Processing", _gc_timer);
527
528 ref_processor()->setup_policy(clear_all_softrefs);
529 const ReferenceProcessorStats& stats =
530 ref_processor()->process_discovered_references(
531 is_alive_closure(), mark_and_push_closure(), follow_stack_closure(), NULL, _gc_timer);
582 // This will also compact the young gen spaces.
583 old_gen->precompact();
584 }
585
586 void PSMarkSweep::mark_sweep_phase3() {
587 // Adjust the pointers to reflect the new locations
588 GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", _gc_timer);
589
590 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
591 PSYoungGen* young_gen = heap->young_gen();
592 PSOldGen* old_gen = heap->old_gen();
593
594 // Need to clear claim bits before the tracing starts.
595 ClassLoaderDataGraph::clear_claimed_marks();
596
597 // General strong roots.
598 Universe::oops_do(adjust_pointer_closure());
599 JNIHandles::oops_do(adjust_pointer_closure()); // Global (strong) JNI handles
600 Threads::oops_do(adjust_pointer_closure(), NULL);
601 ObjectSynchronizer::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 AOTLoader::oops_do(adjust_pointer_closure());
615 StringTable::oops_do(adjust_pointer_closure());
616 ref_processor()->weak_oops_do(adjust_pointer_closure());
617 PSScavenge::reference_processor()->weak_oops_do(adjust_pointer_closure());
618
619 adjust_marks();
620
621 young_gen->adjust_pointers();
|