--- old/src/share/vm/gc/g1/g1StringDedupThread.cpp	2015-05-29 14:23:26.474746571 -0400
+++ new/src/share/vm/gc/g1/g1StringDedupThread.cpp	2015-05-29 14:23:25.634698271 -0400
@@ -23,12 +23,14 @@
  */
 
 #include "precompiled.hpp"
+#include "classfile/stringTable.hpp"
 #include "gc/g1/g1Log.hpp"
 #include "gc/g1/g1StringDedup.hpp"
 #include "gc/g1/g1StringDedupQueue.hpp"
 #include "gc/g1/g1StringDedupTable.hpp"
 #include "gc/g1/g1StringDedupThread.hpp"
 #include "gc/g1/suspendibleThreadSet.hpp"
+#include "oops/oop.inline.hpp"
 #include "runtime/atomic.inline.hpp"
 
 G1StringDedupThread* G1StringDedupThread::_thread = NULL;
@@ -55,11 +57,31 @@
   return _thread;
 }
 
+class G1StringDedupSharedClosure: public OopClosure {
+ private:
+  G1StringDedupStat& _stat;
+
+ public:
+  G1StringDedupSharedClosure(G1StringDedupStat& stat) : _stat(stat) {}
+
+  virtual void do_oop(oop* p) { ShouldNotReachHere(); }
+  virtual void do_oop(narrowOop* p) {
+    oop java_string = oopDesc::load_decode_heap_oop(p);
+    G1StringDedupTable::deduplicate(java_string, _stat);
+  }
+};
+
+void G1StringDedupThread::deduplicate_shared_strings(G1StringDedupStat& stat) {
+  G1StringDedupSharedClosure sharedStringDedup(stat);
+  StringTable::shared_oops_do(&sharedStringDedup);
+}
+
 void G1StringDedupThread::run() {
   G1StringDedupStat total_stat;
 
   initialize_in_thread();
   wait_for_universe_init();
+  deduplicate_shared_strings(total_stat);
 
   // Main loop
   for (;;) {