diff -r 04f1d5d36714 -r 5a32d2a3cc1e src/share/vm/gc_implementation/g1/g1_globals.hpp
--- a/src/share/vm/gc_implementation/g1/g1_globals.hpp	Tue Jan 07 13:31:33 2014 +0100
+++ b/src/share/vm/gc_implementation/g1/g1_globals.hpp	Mon Jan 20 11:47:07 2014 +0100
@@ -71,6 +71,9 @@
   diagnostic(bool, G1TraceConcRefinement, false,                            \
           "Trace G1 concurrent refinement")                                 \
                                                                             \
+  experimental(bool, G1TraceStringSymbolTableScrubbing, false,              \
+          "Trace information string and symbol table scrubbing.")           \
+                                                                            \
   product(double, G1ConcMarkStepDurationMillis, 10.0,                       \
           "Target duration of individual concurrent marking steps "         \
           "in milliseconds.")                                               \