1467 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
1468 // Case b above.
1469 obj_beg = dense_prefix_end - 1;
1470 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
1471 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
1472 // Case d above.
1473 obj_beg = dense_prefix_end - 3;
1474 obj_len = 3;
1475 }
1476 #endif // #ifdef _LP64
1477
1478 CollectedHeap::fill_with_object(obj_beg, obj_len);
1479 _mark_bitmap.mark_obj(obj_beg, obj_len);
1480 _summary_data.add_obj(obj_beg, obj_len);
1481 assert(start_array(id) != NULL, "sanity");
1482 start_array(id)->allocate_block(obj_beg);
1483 }
1484 }
1485
1486 void
1487 PSParallelCompact::clear_source_region(HeapWord* beg_addr, HeapWord* end_addr)
1488 {
1489 RegionData* const beg_ptr = _summary_data.addr_to_region_ptr(beg_addr);
1490 HeapWord* const end_aligned_up = _summary_data.region_align_up(end_addr);
1491 RegionData* const end_ptr = _summary_data.addr_to_region_ptr(end_aligned_up);
1492 for (RegionData* cur = beg_ptr; cur < end_ptr; ++cur) {
1493 cur->set_source_region(0);
1494 }
1495 }
1496
1497 void
1498 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
1499 {
1500 assert(id < last_space_id, "id out of range");
1501 assert(_space_info[id].dense_prefix() == _space_info[id].space()->bottom(),
1502 "should have been reset in summarize_spaces_quick()");
1503
1504 const MutableSpace* space = _space_info[id].space();
1505 if (_space_info[id].new_top() != space->bottom()) {
1506 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
1507 _space_info[id].set_dense_prefix(dense_prefix_end);
1508
1509 #ifndef PRODUCT
1510 if (TraceParallelOldGCDensePrefix) {
1511 print_dense_prefix_stats("ratio", id, maximum_compaction,
1512 dense_prefix_end);
1513 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
1514 print_dense_prefix_stats("density", id, maximum_compaction, addr);
1515 }
1516 #endif // #ifndef PRODUCT
1517
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1467 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) {
1468 // Case b above.
1469 obj_beg = dense_prefix_end - 1;
1470 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) &&
1471 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) {
1472 // Case d above.
1473 obj_beg = dense_prefix_end - 3;
1474 obj_len = 3;
1475 }
1476 #endif // #ifdef _LP64
1477
1478 CollectedHeap::fill_with_object(obj_beg, obj_len);
1479 _mark_bitmap.mark_obj(obj_beg, obj_len);
1480 _summary_data.add_obj(obj_beg, obj_len);
1481 assert(start_array(id) != NULL, "sanity");
1482 start_array(id)->allocate_block(obj_beg);
1483 }
1484 }
1485
1486 void
1487 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction)
1488 {
1489 assert(id < last_space_id, "id out of range");
1490 assert(_space_info[id].dense_prefix() == _space_info[id].space()->bottom(),
1491 "should have been reset in summarize_spaces_quick()");
1492
1493 const MutableSpace* space = _space_info[id].space();
1494 if (_space_info[id].new_top() != space->bottom()) {
1495 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction);
1496 _space_info[id].set_dense_prefix(dense_prefix_end);
1497
1498 #ifndef PRODUCT
1499 if (TraceParallelOldGCDensePrefix) {
1500 print_dense_prefix_stats("ratio", id, maximum_compaction,
1501 dense_prefix_end);
1502 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction);
1503 print_dense_prefix_stats("density", id, maximum_compaction, addr);
1504 }
1505 #endif // #ifndef PRODUCT
1506
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