| /* |
| * Copyright (c) 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 8046171 |
| * @summary Test that private Lookup works for both nestmate-enabled classes |
| * and legacy classes |
| * @compile TestPrivateLookup.java |
| * @run main TestPrivateLookup |
| * @compile -source 10 -target 10 TestPrivateLookup.java |
| * @run main TestPrivateLookup noNestmates |
| */ |
| |
| // Need the explicit first @compile above so that jtreg forces recompilation |
| // with latest version. Otherwise compile-on-demand sees the JDK 10 version |
| // and assumes it is up to date and then runs the test using that version - |
| // which fails. |
| |
| import java.lang.invoke.*; |
| import static java.lang.invoke.MethodHandles.*; |
| import static java.lang.invoke.MethodType.*; |
| |
| public class TestPrivateLookup { |
| |
| static boolean compiledForNestmates; |
| |
| static class C { |
| static class D { |
| private void m() { } |
| } |
| |
| static void test() throws Throwable { |
| MethodType M_T = MethodType.methodType(void.class); |
| // Direct lookup from C |
| Lookup l = lookup(); |
| try { |
| MethodHandle mh = l.findVirtual(D.class, "m", M_T); |
| if (compiledForNestmates) { |
| System.out.println("Lookup of D.m from C succeeded as expected with nestmates"); |
| } |
| else { |
| throw new Error("Unexpected success when not compiled for nestmates!"); |
| } |
| } |
| catch (IllegalAccessException iae) { |
| if (!compiledForNestmates) { |
| System.out.println("Lookup of D.m from C failed as expected without nestmates"); |
| } |
| else { |
| throw new Error("Unexpected failure with nestmates", iae); |
| } |
| } |
| // switch lookup class to D |
| l = l.in(D.class); |
| try { |
| MethodHandle mh = l.findVirtual(D.class, "m", M_T); |
| System.out.println("Lookup of D.m from D succeeded as expected" + |
| " with" + (compiledForNestmates ? "" : "out") + |
| " nestmates"); |
| } |
| catch (IllegalAccessException iae) { |
| throw new Error("Lookup of D.m from D failed", iae); |
| } |
| } |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| |
| // If there's no nesthost attribute A.getNestHost() == A |
| compiledForNestmates = C.D.class.getNestHost() == TestPrivateLookup.class; |
| // sanity check |
| boolean expectingNestmates = args.length == 0; |
| |
| if (compiledForNestmates && !expectingNestmates) { |
| throw new Error("Test is being run incorrectly: " + |
| "nestmates are being used but not expected"); |
| } |
| if (expectingNestmates && !compiledForNestmates) { |
| throw new Error("Test is being run incorrectly: " + |
| "nestmates are expected but not being used"); |
| } |
| System.out.println("Testing with" + (expectingNestmates ? "" : "out") + |
| " nestmates"); |
| |
| C.test(); |
| } |
| } |