src/hotspot/share/gc/shared/gc_globals.hpp

@@ -688,11 +688,15 @@
            range(0, max_juint)                                               \
                                                                              \
    product(uint, GCCardSizeInBytes, 512,                                     \
            "Card table entry size (in bytes) for card based collectors")     \
            range(128, NOT_LP64(512) LP64_ONLY(1024))                         \
-           constraint(GCCardSizeInBytesConstraintFunc,AtParse)
-   // end of GC_FLAGS
+           constraint(GCCardSizeInBytesConstraintFunc,AtParse)               \
+                                                                             \
+   product(bool, UseAltGCForwarding, false, EXPERIMENTAL,                    \
+           "Use alternative GC forwarding that preserves object headers")    \
+ 
+ // end of GC_FLAGS
  
  DECLARE_FLAGS(GC_FLAGS)
  
  #endif // SHARE_GC_SHARED_GC_GLOBALS_HPP