1044                                             heap->young_gen(), heap->old_gen());
1045   }
1046 
1047   // Update heap occupancy information which is used as input to the soft ref
1048   // clearing policy at the next gc.
1049   Universe::update_heap_info_at_gc();
1050 
1051   bool young_gen_empty = eden_empty && from_space->is_empty() &&
1052     to_space->is_empty();
1053 
1054   PSCardTable* ct = heap->card_table();
1055   MemRegion old_mr = heap->old_gen()->reserved();
1056   if (young_gen_empty) {
1057     ct->clear(MemRegion(old_mr.start(), old_mr.end()));
1058   } else {
1059     ct->invalidate(MemRegion(old_mr.start(), old_mr.end()));
1060   }
1061 
1062   // Delete metaspaces for unloaded class loaders and clean up loader_data graph
1063   ClassLoaderDataGraph::purge();
1064   MetaspaceUtils::verify_metrics();
1065 
1066   heap->prune_scavengable_nmethods();
1067 
1068 #if COMPILER2_OR_JVMCI
1069   DerivedPointerTable::update_pointers();
1070 #endif
1071 
1072   if (ZapUnusedHeapArea) {
1073     heap->gen_mangle_unused_area();
1074   }
1075 
1076   // Update time of last GC
1077   reset_millis_since_last_gc();
1078 }
1079 
1080 HeapWord*
1081 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
1082                                                     bool maximum_compaction)
1083 {
1084   const size_t region_size = ParallelCompactData::RegionSize;

1044                                             heap->young_gen(), heap->old_gen());
1045   }
1046 
1047   // Update heap occupancy information which is used as input to the soft ref
1048   // clearing policy at the next gc.
1049   Universe::update_heap_info_at_gc();
1050 
1051   bool young_gen_empty = eden_empty && from_space->is_empty() &&
1052     to_space->is_empty();
1053 
1054   PSCardTable* ct = heap->card_table();
1055   MemRegion old_mr = heap->old_gen()->reserved();
1056   if (young_gen_empty) {
1057     ct->clear(MemRegion(old_mr.start(), old_mr.end()));
1058   } else {
1059     ct->invalidate(MemRegion(old_mr.start(), old_mr.end()));
1060   }
1061 
1062   // Delete metaspaces for unloaded class loaders and clean up loader_data graph
1063   ClassLoaderDataGraph::purge();
1064   DEBUG_ONLY(MetaspaceUtils::verify(false);)
1065 
1066   heap->prune_scavengable_nmethods();
1067 
1068 #if COMPILER2_OR_JVMCI
1069   DerivedPointerTable::update_pointers();
1070 #endif
1071 
1072   if (ZapUnusedHeapArea) {
1073     heap->gen_mangle_unused_area();
1074   }
1075 
1076   // Update time of last GC
1077   reset_millis_since_last_gc();
1078 }
1079 
1080 HeapWord*
1081 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id,
1082                                                     bool maximum_compaction)
1083 {
1084   const size_t region_size = ParallelCompactData::RegionSize;