55 inline const BitMapView ZLiveMap::segment_live_bits() const {
 56   return BitMapView(const_cast<BitMap::bm_word_t*>(&_segment_live_bits), nsegments);
 57 }
 58 
 59 inline const BitMapView ZLiveMap::segment_claim_bits() const {
 60   return BitMapView(const_cast<BitMap::bm_word_t*>(&_segment_claim_bits), nsegments);
 61 }
 62 
 63 inline BitMapView ZLiveMap::segment_live_bits() {
 64   return BitMapView(&_segment_live_bits, nsegments);
 65 }
 66 
 67 inline BitMapView ZLiveMap::segment_claim_bits() {
 68   return BitMapView(&_segment_claim_bits, nsegments);
 69 }
 70 
 71 inline bool ZLiveMap::is_segment_live(BitMap::idx_t segment) const {
 72   return segment_live_bits().par_at(segment);
 73 }
 74 
 75 inline bool ZLiveMap::set_segment_live_atomic(BitMap::idx_t segment) {
 76   return segment_live_bits().par_set_bit(segment, memory_order_release);
 77 }
 78 
 79 inline bool ZLiveMap::claim_segment(BitMap::idx_t segment) {
 80   return segment_claim_bits().par_set_bit(segment, memory_order_acq_rel);
 81 }
 82 
 83 inline BitMap::idx_t ZLiveMap::first_live_segment() const {
 84   return segment_live_bits().get_next_one_offset(0, nsegments);
 85 }
 86 
 87 inline BitMap::idx_t ZLiveMap::next_live_segment(BitMap::idx_t segment) const {
 88   return segment_live_bits().get_next_one_offset(segment + 1, nsegments);
 89 }
 90 
 91 inline BitMap::idx_t ZLiveMap::segment_size() const {
 92   return _bitmap.size() / nsegments;
 93 }
 94 
 95 inline BitMap::idx_t ZLiveMap::index_to_segment(BitMap::idx_t index) const {
 96   return index >> _segment_shift;
 97 }
 98 
 99 inline bool ZLiveMap::get(size_t index) const {
100   BitMap::idx_t segment = index_to_segment(index);
101   return is_marked() &&              // Page is marked
102          is_segment_live(segment) && // Segment is marked
103          _bitmap.at(index);          // Object is marked
104 }
105 
106 inline bool ZLiveMap::set_atomic(size_t index, bool finalizable, bool& inc_live) {
107   if (!is_marked()) {
108     // First object to be marked during this
109     // cycle, reset marking information.
110     reset(index);
111   }
112 
113   const BitMap::idx_t segment = index_to_segment(index);
114   if (!is_segment_live(segment)) {
115     // First object to be marked in this segment during
116     // this cycle, reset segment bitmap.
117     reset_segment(segment);
118   }
119 
120   return _bitmap.par_set_bit_pair(index, finalizable, inc_live);
121 }
122 
123 inline void ZLiveMap::inc_live_atomic(uint32_t objects, size_t bytes) {
124   Atomic::add(objects, &_live_objects);
125   Atomic::add(bytes, &_live_bytes);
126 }
127 
128 inline BitMap::idx_t ZLiveMap::segment_start(BitMap::idx_t segment) const {
129   return segment_size() * segment;
130 }
131 
132 inline BitMap::idx_t ZLiveMap::segment_end(BitMap::idx_t segment) const {
133   return segment_start(segment) + segment_size();
134 }
135 
136 inline void ZLiveMap::iterate_segment(ObjectClosure* cl, BitMap::idx_t segment, uintptr_t page_start, size_t page_object_alignment_shift) {
137   assert(is_segment_live(segment), "Must be");
138 
139   const BitMap::idx_t start_index = segment_start(segment);
140   const BitMap::idx_t end_index   = segment_end(segment);
141   BitMap::idx_t index = _bitmap.get_next_one_offset(start_index, end_index);
142 
143   while (index < end_index) {

 55 inline const BitMapView ZLiveMap::segment_live_bits() const {
 56   return BitMapView(const_cast<BitMap::bm_word_t*>(&_segment_live_bits), nsegments);
 57 }
 58 
 59 inline const BitMapView ZLiveMap::segment_claim_bits() const {
 60   return BitMapView(const_cast<BitMap::bm_word_t*>(&_segment_claim_bits), nsegments);
 61 }
 62 
 63 inline BitMapView ZLiveMap::segment_live_bits() {
 64   return BitMapView(&_segment_live_bits, nsegments);
 65 }
 66 
 67 inline BitMapView ZLiveMap::segment_claim_bits() {
 68   return BitMapView(&_segment_claim_bits, nsegments);
 69 }
 70 
 71 inline bool ZLiveMap::is_segment_live(BitMap::idx_t segment) const {
 72   return segment_live_bits().par_at(segment);
 73 }
 74 
 75 inline bool ZLiveMap::set_segment_live(BitMap::idx_t segment) {
 76   return segment_live_bits().par_set_bit(segment, memory_order_release);
 77 }
 78 
 79 inline bool ZLiveMap::claim_segment(BitMap::idx_t segment) {
 80   return segment_claim_bits().par_set_bit(segment, memory_order_acq_rel);
 81 }
 82 
 83 inline BitMap::idx_t ZLiveMap::first_live_segment() const {
 84   return segment_live_bits().get_next_one_offset(0, nsegments);
 85 }
 86 
 87 inline BitMap::idx_t ZLiveMap::next_live_segment(BitMap::idx_t segment) const {
 88   return segment_live_bits().get_next_one_offset(segment + 1, nsegments);
 89 }
 90 
 91 inline BitMap::idx_t ZLiveMap::segment_size() const {
 92   return _bitmap.size() / nsegments;
 93 }
 94 
 95 inline BitMap::idx_t ZLiveMap::index_to_segment(BitMap::idx_t index) const {
 96   return index >> _segment_shift;
 97 }
 98 
 99 inline bool ZLiveMap::get(size_t index) const {
100   BitMap::idx_t segment = index_to_segment(index);
101   return is_marked() &&              // Page is marked
102          is_segment_live(segment) && // Segment is marked
103          _bitmap.at(index);          // Object is marked
104 }
105 
106 inline bool ZLiveMap::set(size_t index, bool finalizable, bool& inc_live) {
107   if (!is_marked()) {
108     // First object to be marked during this
109     // cycle, reset marking information.
110     reset(index);
111   }
112 
113   const BitMap::idx_t segment = index_to_segment(index);
114   if (!is_segment_live(segment)) {
115     // First object to be marked in this segment during
116     // this cycle, reset segment bitmap.
117     reset_segment(segment);
118   }
119 
120   return _bitmap.par_set_bit_pair(index, finalizable, inc_live);
121 }
122 
123 inline void ZLiveMap::inc_live(uint32_t objects, size_t bytes) {
124   Atomic::add(objects, &_live_objects);
125   Atomic::add(bytes, &_live_bytes);
126 }
127 
128 inline BitMap::idx_t ZLiveMap::segment_start(BitMap::idx_t segment) const {
129   return segment_size() * segment;
130 }
131 
132 inline BitMap::idx_t ZLiveMap::segment_end(BitMap::idx_t segment) const {
133   return segment_start(segment) + segment_size();
134 }
135 
136 inline void ZLiveMap::iterate_segment(ObjectClosure* cl, BitMap::idx_t segment, uintptr_t page_start, size_t page_object_alignment_shift) {
137   assert(is_segment_live(segment), "Must be");
138 
139   const BitMap::idx_t start_index = segment_start(segment);
140   const BitMap::idx_t end_index   = segment_end(segment);
141   BitMap::idx_t index = _bitmap.get_next_one_offset(start_index, end_index);
142 
143   while (index < end_index) {