src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp

rev 2652 : 7085906: Replace the permgen allocated sentinelRef with a self-looped end
Summary: Remove the sentinelRef and let the last Reference in a discovered chain point back to itself.
Reviewed-by: TBD1, TBD2

*** 4611,4621 ****
    if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) {
      // We need to treat the discovered reference lists as roots and
      // keep entries (which are added by the marking threads) on them
      // live until they can be processed at the end of marking.
      ref_processor()->weak_oops_do(&buf_scan_non_heap_roots);
-     ref_processor()->oops_do(&buf_scan_non_heap_roots);
    }
  
    // Finish up any enqueued closure apps (attributed as object copy time).
    buf_scan_non_heap_roots.done();
    buf_scan_perm.done();
--- 4611,4620 ----