--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp	Fri Jun 27 19:12:11 2008 -0700
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp	Wed Jul 09 15:08:55 2008 -0700
@@ -938,3 +938,23 @@
   // Delegate the resize to the generation.
   _old_gen->resize(desired_free_space);
 }
+
+#ifndef PRODUCT
+void ParallelScavengeHeap::record_gen_tops_before_GC() {
+  if (ZapUnusedHeapArea) {
+    young_gen()->record_spaces_top();
+    old_gen()->record_spaces_top();
+    perm_gen()->record_spaces_top();
+  }
+}
+
+void ParallelScavengeHeap::gen_mangle_unused_area() {
+  if (ZapUnusedHeapArea) {
+    young_gen()->eden_space()->mangle_unused_area();
+    young_gen()->to_space()->mangle_unused_area();
+    young_gen()->from_space()->mangle_unused_area();
+    old_gen()->object_space()->mangle_unused_area();
+    perm_gen()->object_space()->mangle_unused_area();
+  }
+}
+#endif