[Truffle] Truffle::Debug.storage_class for Hash

Author: chrisseaton

truffle/src/main/java/org/jruby/truffle/nodes/core/TruffleDebugNodes.java

@@ -18,6 +18,7 @@
 import org.jruby.truffle.runtime.RubyContext;
 import org.jruby.truffle.runtime.backtrace.Backtrace;
 import org.jruby.truffle.runtime.core.RubyArray;
+import org.jruby.truffle.runtime.core.RubyHash;
 import org.jruby.truffle.runtime.core.RubyNilClass;
 import org.jruby.truffle.runtime.core.RubyString;
 
@@ -119,7 +120,7 @@ public StorageClassNode(StorageClassNode prev) {
         }
 
         @Specialization
-        public RubyString javaClassOf(RubyArray array) {
+        public RubyString storageClass(RubyArray array) {
             notDesignedForCompilation();
 
             if (array.getStore() == null) {
@@ -129,6 +130,17 @@ public RubyString javaClassOf(RubyArray array) {
             }
         }
 
+        @Specialization
+        public RubyString storageClass(RubyHash hash) {
+            notDesignedForCompilation();
+
+            if (hash.getStore() == null) {
+                return getContext().makeString("null");
+            } else {
+                return getContext().makeString(hash.getStore().getClass().getName());
+            }
+        }
+
     }
 
     @CoreMethod(names = "panic", onSingleton = true)