--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Tue Aug 25 21:05:26 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Tue Aug 25 17:22:56 2015 -0400
@@ -757,6 +757,12 @@
   // alloc_archive_regions, and after class loading has occurred.
   void fill_archive_regions(MemRegion* range, size_t count);
 
+  // For each of the specified MemRegions, uncommit the containing G1 regions
+  // which had been allocated by alloc_archive_regions. This should be called
+  // rather than fill_archive_regions at JVM init time if the archive file
+  // mapping failed, with the same non-overlapping and sorted MemRegion array.
+  void dealloc_archive_regions(MemRegion* range, size_t count);
+
 protected:
 
   // Shrink the garbage-first heap by at most the given size (in bytes!).