sim: check redirect path when unserialize for cpt

Change-Id: I55b8ce1770b0580d52b8dfa782572d492c1bf727

src/sim/fd_array.hh

@@ -36,9 +36,9 @@
 #include <map>
 #include <memory>
 #include <string>
-
 #include "sim/fd_entry.hh"
 #include "sim/serialize.hh"
+#include "sim/sim_object.hh"
 
 namespace gem5
 {
@@ -117,7 +117,11 @@ class FDArray : public Serializable
      * Serialization methods for file descriptors
      */
     void serialize(CheckpointOut &cp) const override;
-    void unserialize(CheckpointIn &cp) override;
+    void unserialize(CheckpointIn &cp, SimObject* process_ptr );
+    void unserialize(CheckpointIn &cp) override {
+      unserialize(cp, nullptr);
+    };
+
 
   private:
     /**