353 }
354
355 void G1PrepareCompactClosure::prepare_for_compaction_work(CompactPoint* cp,
356 HeapRegion* hr,
357 HeapWord* end) {
358 hr->prepare_for_compaction(cp);
359 // Also clear the part of the card table that will be unused after
360 // compaction.
361 _mrbs->clear(MemRegion(hr->compaction_top(), end));
362 }
363
364 void G1PrepareCompactClosure::update_sets() {
365 // We'll recalculate total used bytes and recreate the free list
366 // at the end of the GC, so no point in updating those values here.
367 HeapRegionSetCount empty_set;
368 _g1h->remove_from_old_sets(empty_set, _humongous_regions_removed);
369 }
370
371 bool G1PrepareCompactClosure::doHeapRegion(HeapRegion* hr) {
372 if (hr->is_humongous()) {
373 oop obj;
374 if (hr->is_starts_humongous()) {
375 obj = oop(hr->bottom());
376 if (obj->is_gc_marked()) {
377 obj->forward_to(obj);
378 } else {
379 free_humongous_region(hr);
380 }
381 } else {
382 assert(hr->is_continues_humongous(), "Invalid humongous.");
383 obj = oop(hr->humongous_start_region()->bottom());
384 if (!obj->is_gc_marked()) {
385 free_humongous_region(hr);
386 }
387 }
388 } else if (!hr->is_pinned()) {
389 prepare_for_compaction(hr, hr->end());
390 }
391 return false;
392 }
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353 }
354
355 void G1PrepareCompactClosure::prepare_for_compaction_work(CompactPoint* cp,
356 HeapRegion* hr,
357 HeapWord* end) {
358 hr->prepare_for_compaction(cp);
359 // Also clear the part of the card table that will be unused after
360 // compaction.
361 _mrbs->clear(MemRegion(hr->compaction_top(), end));
362 }
363
364 void G1PrepareCompactClosure::update_sets() {
365 // We'll recalculate total used bytes and recreate the free list
366 // at the end of the GC, so no point in updating those values here.
367 HeapRegionSetCount empty_set;
368 _g1h->remove_from_old_sets(empty_set, _humongous_regions_removed);
369 }
370
371 bool G1PrepareCompactClosure::doHeapRegion(HeapRegion* hr) {
372 if (hr->is_humongous()) {
373 oop obj = oop(hr->humongous_start_region()->bottom());
374 if (hr->is_starts_humongous() && obj->is_gc_marked()) {
375 obj->forward_to(obj);
376 }
377 if (!obj->is_gc_marked()) {
378 free_humongous_region(hr);
379 }
380 } else if (!hr->is_pinned()) {
381 prepare_for_compaction(hr, hr->end());
382 }
383 return false;
384 }
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