150 void PSOldGen::precompact() {

   150 void PSOldGen::precompact() {

   151   ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();

   151   ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();

   152   assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");

   152   assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");

   153 

   153 

   154   // Reset start array first.

   154   // Reset start array first.

   156   start_array()->reset();

   155   start_array()->reset();

   158 

   156 

   159   object_mark_sweep()->precompact();

   157   object_mark_sweep()->precompact();

   160 

   158 

   161   // Now compact the young gen

   159   // Now compact the young gen

   162   heap->young_gen()->precompact();

   160   heap->young_gen()->precompact();