--- /dev/null 2017-05-01 18:41:26.000000000 -0700 +++ new/test/java/lang/invoke/lookup/ReflectiveLookupTest.java 2017-05-01 18:41:26.000000000 -0700 @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2017, 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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. + */ + +/* + * @test + * @bug 8020801 + * @summary Restriction on reflective call to MethodHandles.lookup method + * @run main java.base/java.lang.LookupTest + * @run main ReflectiveLookupTest + */ + +import java.lang.invoke.*; +import java.lang.invoke.MethodHandles.Lookup; + +import static java.lang.invoke.MethodType.*; + +/* + * Lookup object can be obtained statically or reflectively. + */ +public class ReflectiveLookupTest { + public static void main(String... args) throws Throwable { + // Get a full power lookup + Lookup lookup1 = MethodHandles.lookup(); + MethodHandle mh1 = lookup1.findStatic(lookup1.lookupClass(), + "foo", + methodType(String.class)); + assertEquals((String) mh1.invokeExact(), foo()); + + // Get a full power Lookup reflectively. + Lookup lookup2 = (Lookup) MethodHandles.class.getMethod("lookup").invoke(null); + assertEquals(lookup1.lookupClass(), lookup2.lookupClass()); + assertEquals(lookup1.lookupModes(), lookup2.lookupModes()); + MethodHandle mh2 = lookup2.findStatic(lookup2.lookupClass(), + "foo", + methodType(String.class)); + assertEquals((String) mh2.invokeExact(), foo()); + } + + static String foo() { + return "foo!"; + } + + static void assertEquals(Object o1, Object o2) { + if (!o1.equals(o2)) { + throw new RuntimeException(o1 + " != " + o2); + } + } +} \ No newline at end of file