99 // Ensure the object fit in the current region.
100 while (!object_will_fit(size)) {
101 switch_region();
102 }
103
104 // Store a forwarding pointer if the object should be moved.
105 if ((HeapWord*)object != _compaction_top) {
106 object->forward_to(oop(_compaction_top));
107 } else {
108 if (object->forwardee() != NULL) {
109 // Object should not move but mark-word is used so it looks like the
110 // object is forwarded. Need to clear the mark and it's no problem
111 // since it will be restored by preserved marks. There is an exception
112 // with BiasedLocking, in this case forwardee() will return NULL
113 // even if the mark-word is used. This is no problem since
114 // forwardee() will return NULL in the compaction phase as well.
115 object->init_mark_raw();
116 } else {
117 // Make sure object has the correct mark-word set or that it will be
118 // fixed when restoring the preserved marks.
119 assert(object->mark_raw() == markWord::prototype_for_object(object) || // Correct mark
120 object->mark_raw().must_be_preserved(object) || // Will be restored by PreservedMarksSet
121 (UseBiasedLocking && object->has_bias_pattern_raw()), // Will be restored by BiasedLocking
122 "should have correct prototype obj: " PTR_FORMAT " mark: " PTR_FORMAT " prototype: " PTR_FORMAT,
123 p2i(object), object->mark_raw().value(), markWord::prototype_for_object(object).value());
124 }
125 assert(object->forwardee() == NULL, "should be forwarded to NULL");
126 }
127
128 // Update compaction values.
129 _compaction_top += size;
130 if (_compaction_top > _threshold) {
131 _threshold = _current_region->cross_threshold(_compaction_top - size, _compaction_top);
132 }
133 }
134
135 void G1FullGCCompactionPoint::add(HeapRegion* hr) {
136 _compaction_regions->append(hr);
137 }
138
139 void G1FullGCCompactionPoint::merge(G1FullGCCompactionPoint* other) {
140 _compaction_regions->appendAll(other->regions());
141 }
142
143 HeapRegion* G1FullGCCompactionPoint::remove_last() {
|
99 // Ensure the object fit in the current region.
100 while (!object_will_fit(size)) {
101 switch_region();
102 }
103
104 // Store a forwarding pointer if the object should be moved.
105 if ((HeapWord*)object != _compaction_top) {
106 object->forward_to(oop(_compaction_top));
107 } else {
108 if (object->forwardee() != NULL) {
109 // Object should not move but mark-word is used so it looks like the
110 // object is forwarded. Need to clear the mark and it's no problem
111 // since it will be restored by preserved marks. There is an exception
112 // with BiasedLocking, in this case forwardee() will return NULL
113 // even if the mark-word is used. This is no problem since
114 // forwardee() will return NULL in the compaction phase as well.
115 object->init_mark_raw();
116 } else {
117 // Make sure object has the correct mark-word set or that it will be
118 // fixed when restoring the preserved marks.
119 assert(object->mark_raw() == markWord::prototype_for_klass(object->klass()) || // Correct mark
120 object->mark_must_be_preserved() || // Will be restored by PreservedMarksSet
121 (UseBiasedLocking && object->has_bias_pattern_raw()), // Will be restored by BiasedLocking
122 "should have correct prototype obj: " PTR_FORMAT " mark: " PTR_FORMAT " prototype: " PTR_FORMAT,
123 p2i(object), object->mark_raw().value(), markWord::prototype_for_klass(object->klass()).value());
124 }
125 assert(object->forwardee() == NULL, "should be forwarded to NULL");
126 }
127
128 // Update compaction values.
129 _compaction_top += size;
130 if (_compaction_top > _threshold) {
131 _threshold = _current_region->cross_threshold(_compaction_top - size, _compaction_top);
132 }
133 }
134
135 void G1FullGCCompactionPoint::add(HeapRegion* hr) {
136 _compaction_regions->append(hr);
137 }
138
139 void G1FullGCCompactionPoint::merge(G1FullGCCompactionPoint* other) {
140 _compaction_regions->appendAll(other->regions());
141 }
142
143 HeapRegion* G1FullGCCompactionPoint::remove_last() {
|