--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaScriptEngine.java	2019-04-12 23:02:50.848590478 +0900
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaScriptEngine.java	2019-04-12 23:02:50.406590172 +0900
@@ -46,6 +46,17 @@
  * this class exposed certain "global" functions to the script.
  */
 public abstract class JSJavaScriptEngine extends MapScriptObject {
+
+    private static native Module getEveryoneModule();
+
+    // Open all packages in jdk.hotspot.agent to all modules.
+    static{
+      var everyoneModule = getEveryoneModule();
+      var saModule = JSJavaScriptEngine.class.getModule();
+      saModule.getPackages()
+              .forEach(p -> saModule.addOpens(p, everyoneModule));
+    }
+
     /**
      * Start a read-eval-print loop with this engine.
      */