--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/InvocationTests/shared/Caller.java	Wed Jun 26 09:06:32 2019 -0400
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package shared;
+
+import java.lang.reflect.InvocationTargetException;
+
+/*******************************************************************/
+// Invoke different target method callers
+/*******************************************************************/
+
+public class Caller {
+    private ClassLoader loader;
+    private Class paramClass;
+    private Class targetClass;
+    private boolean passed = true;
+    private Checker checker;
+
+    public Caller(ClassLoader loader, Checker checker,
+                  Class paramClass, Class targetClass) {
+        this.loader = loader;
+        this.paramClass = paramClass;
+        this.targetClass = targetClass;
+        this.checker = checker;
+    }
+
+    public boolean isPassed() {
+        return passed;
+    }
+
+    public String call(String invoker) {
+        try {
+            Class clazz = loader.loadClass(invoker);
+
+            String expectedBehavior = checker.check(clazz);
+
+            String result = null;
+            Throwable exc = null;
+            try {
+                java.lang.reflect.Method m = clazz.getDeclaredMethod("call", paramClass);
+                result = (String) m.invoke(null, targetClass.newInstance());
+            } catch (InvocationTargetException e) {
+                exc = e.getCause();
+            } catch (Throwable e) {
+                exc = e;
+            }
+
+            if (result == null) {
+                if (exc != null) {
+                    result = exc.getClass().getName();
+                } else {
+                    result = "null";
+                }
+            }
+
+            if (!(result.equals(expectedBehavior) || "".equals(expectedBehavior)) ) {
+                passed = false;
+                result = String.format("%s/%s", result, expectedBehavior);
+            }
+
+            return Checker.abbreviateResult(result);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}