--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2020-02-14 18:02:43.959689054 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2020-02-14 18:02:43.751686163 +0100
@@ -261,20 +261,15 @@
 }
 
 G1CMRootMemRegions::G1CMRootMemRegions(uint const max_regions) :
-    _root_regions(NULL),
+    _root_regions(MemRegion::create(max_regions, mtGC)),
     _max_regions(max_regions),
     _num_root_regions(0),
     _claimed_root_regions(0),
     _scan_in_progress(false),
-    _should_abort(false) {
-  _root_regions = new MemRegion[_max_regions];
-  if (_root_regions == NULL) {
-    vm_exit_during_initialization("Could not allocate root MemRegion set.");
-  }
-}
+    _should_abort(false) { }
 
 G1CMRootMemRegions::~G1CMRootMemRegions() {
-  delete[] _root_regions;
+  FREE_C_HEAP_ARRAY(MemRegion, _root_regions);
 }
 
 void G1CMRootMemRegions::reset() {