491     space_invariants();
 492 }
 493 void ASPSYoungGen::reset_after_change() {
 494   assert_locked_or_safepoint(Heap_lock);
 495 
 496   _reserved = MemRegion((HeapWord*)virtual_space()->low_boundary(),
 497                         (HeapWord*)virtual_space()->high_boundary());
 498   PSScavenge::reference_processor()->set_span(_reserved);
 499 
 500   HeapWord* new_eden_bottom = (HeapWord*)virtual_space()->low();
 501   HeapWord* eden_bottom = eden_space()->bottom();
 502   if (new_eden_bottom != eden_bottom) {
 503     MemRegion eden_mr(new_eden_bottom, eden_space()->end());
 504     eden_space()->initialize(eden_mr,
 505                              SpaceDecorator::Clear,
 506                              SpaceDecorator::Mangle);
 507     PSScavenge::set_young_generation_boundary(eden_space()->bottom());
 508   }
 509   MemRegion cmr((HeapWord*)virtual_space()->low(),
 510                 (HeapWord*)virtual_space()->high());
 511   ParallelScavengeHeap::heap()->barrier_set()->resize_covered_region(cmr);
 512 
 513   space_invariants();
 514 }

 491     space_invariants();
 492 }
 493 void ASPSYoungGen::reset_after_change() {
 494   assert_locked_or_safepoint(Heap_lock);
 495 
 496   _reserved = MemRegion((HeapWord*)virtual_space()->low_boundary(),
 497                         (HeapWord*)virtual_space()->high_boundary());
 498   PSScavenge::reference_processor()->set_span(_reserved);
 499 
 500   HeapWord* new_eden_bottom = (HeapWord*)virtual_space()->low();
 501   HeapWord* eden_bottom = eden_space()->bottom();
 502   if (new_eden_bottom != eden_bottom) {
 503     MemRegion eden_mr(new_eden_bottom, eden_space()->end());
 504     eden_space()->initialize(eden_mr,
 505                              SpaceDecorator::Clear,
 506                              SpaceDecorator::Mangle);
 507     PSScavenge::set_young_generation_boundary(eden_space()->bottom());
 508   }
 509   MemRegion cmr((HeapWord*)virtual_space()->low(),
 510                 (HeapWord*)virtual_space()->high());
 511   ParallelScavengeHeap::heap()->barrier_set()->card_table()->resize_covered_region(cmr);
 512 
 513   space_invariants();
 514 }