--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	2013-02-01 15:46:02.000000000 +0100
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	2013-02-01 15:46:02.000000000 +0100
@@ -37,6 +37,7 @@
 #include "gc_implementation/g1/g1Log.hpp"
 #include "gc_implementation/g1/g1MarkSweep.hpp"
 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
+#include "gc_implementation/g1/g1PreserveMarkQueue.hpp"
 #include "gc_implementation/g1/g1RemSet.inline.hpp"
 #include "gc_implementation/g1/heapRegion.inline.hpp"
 #include "gc_implementation/g1/heapRegionRemSet.hpp"
@@ -1893,7 +1894,7 @@
   _ref_processor_stw(NULL),
   _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)),
   _bot_shared(NULL),
-  _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL),
+  _preserved_marks(40, 10000),
   _evac_failure_scan_stack(NULL) ,
   _mark_in_progress(false),
   _cg1r(NULL), _summary_bytes_used(0),
@@ -4215,21 +4216,9 @@
   assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity");
 
   // Now restore saved marks, if any.
-  if (_objs_with_preserved_marks != NULL) {
-    assert(_preserved_marks_of_objs != NULL, "Both or none.");
-    guarantee(_objs_with_preserved_marks->length() ==
-              _preserved_marks_of_objs->length(), "Both or none.");
-    for (int i = 0; i < _objs_with_preserved_marks->length(); i++) {
-      oop obj   = _objs_with_preserved_marks->at(i);
-      markOop m = _preserved_marks_of_objs->at(i);
-      obj->set_mark(m);
-    }
-
-    // Delete the preserved marks growable arrays (allocated on the C heap).
-    delete _objs_with_preserved_marks;
-    delete _preserved_marks_of_objs;
-    _objs_with_preserved_marks = NULL;
-    _preserved_marks_of_objs = NULL;
+  while (_preserved_marks.has_data()) {
+    G1PreserveMarkQueueEntry e = _preserved_marks.remove_first();
+    e.obj->set_mark(e.mark);
   }
 }
 
@@ -4313,15 +4302,7 @@
   // We want to call the "for_promotion_failure" version only in the
   // case of a promotion failure.
   if (m->must_be_preserved_for_promotion_failure(obj)) {
-    if (_objs_with_preserved_marks == NULL) {
-      assert(_preserved_marks_of_objs == NULL, "Both or none.");
-      _objs_with_preserved_marks =
-        new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true);
-      _preserved_marks_of_objs =
-        new (ResourceObj::C_HEAP, mtGC) GrowableArray<markOop>(40, true);
-    }
-    _objs_with_preserved_marks->push(obj);
-    _preserved_marks_of_objs->push(m);
+    _preserved_marks.append(obj, m);
   }
 }