--- /dev/null	2018-05-14 10:15:02.574213890 -0700
+++ new/test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/shared/TestContext.java	2018-05-21 10:53:08.733502398 -0700
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2013, 2018, 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 vm.runtime.defmeth.shared;
+
+import vm.runtime.defmeth.shared.data.method.body.CallMethod;
+import vm.runtime.defmeth.shared.executor.MHInvokeWithArgsTest;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * Encapsulates test context and provides utility methods to invoke methods
+ * in that context through reflection. Should be loaded in the same class loader as all other test classes.
+ * It is needed for correct resolution of initiating class loader in case of reflection invocation scenario.
+ */
+public class TestContext {
+    public static Object invoke(Method m, Object obj, Object... args)
+            throws InvocationTargetException, IllegalAccessException
+    {
+        return m.invoke(obj, args);
+    }
+
+    public static Object invokeWithArguments(CallMethod.Invoke invokeType, Class<?> declaringClass,
+                                             String methodName, MethodType type, Object... arguments) throws Throwable {
+        // Need to do method lookup in the right context
+        // Otherwise, ClassNotFoundException is thrown
+        MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
+        MethodHandle mh;
+
+        // FYI: can't use switch over enum here, because to implement it javac produces auxiliary class TestContext$1
+        // and it can't be accessed from the context where TestContext is loaded
+        if (invokeType == CallMethod.Invoke.VIRTUAL || invokeType == CallMethod.Invoke.INTERFACE) {
+            mh = LOOKUP.findVirtual(declaringClass, methodName, type);
+        } else if (invokeType == CallMethod.Invoke.SPECIAL) {
+            mh = LOOKUP.findSpecial(declaringClass, methodName, type, declaringClass);
+        } else if (invokeType == CallMethod.Invoke.STATIC) {
+            mh = LOOKUP.findStatic(declaringClass, methodName, type);
+        } else {
+            throw new Error("Unknown invoke instruction: "+invokeType);
+        }
+
+        return mh.invokeWithArguments(arguments);
+    }
+}
+