--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/Nestmates/privateFields/TestMethodHandles.java Sat Jun 23 01:32:41 2018 -0400
@@ -0,0 +1,276 @@
+/*
+ * 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.
+ *
+ * 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 access to private fields between nestmates and nest-host
+ * using different flavours of named nested types using MethodHandles
+ * @run main TestMethodHandles
+ */
+
+import java.lang.invoke.*;
+import static java.lang.invoke.MethodHandles.*;
+
+public class TestMethodHandles {
+
+ // Private field of nest-host for nestmates to access
+ private int priv_field;
+
+ // public constructor so we aren't relying on private access
+ public TestMethodHandles() {}
+
+ // Methods that will access private fields of nestmates
+
+ // NOTE: No StaticIface variants as interfaces can't have instance fields
+
+ void access_priv(TestMethodHandles o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, new StaticNested()); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, new StaticNested()); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(InnerNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(StaticNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+
+ // The various nestmates
+
+ static interface StaticIface {
+
+ // Methods that will access private fields of nestmates
+
+ default void access_priv(TestMethodHandles o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ int priv_field = (int) mh.invoke(o);
+ priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ default void access_priv(InnerNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ int priv_field = (int) mh.invoke(o);
+ priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ default void access_priv(StaticNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ int priv_field = (int) mh.invoke(o);
+ priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ }
+
+ static class StaticNested {
+
+ private int priv_field;
+
+ // public constructor so we aren't relying on private access
+ public StaticNested() {}
+
+ // Methods that will access private fields of nestmates
+
+ void access_priv(TestMethodHandles o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(InnerNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(StaticNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, new TestMethodHandles()); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, new TestMethodHandles()); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ }
+
+ class InnerNested {
+
+ private int priv_field;
+
+ // public constructor so we aren't relying on private access
+ public InnerNested() {}
+
+ void access_priv(TestMethodHandles o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(InnerNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, new StaticNested()); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, new StaticNested()); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ void access_priv(StaticNested o) throws Throwable {
+ MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
+ this.priv_field = (int) mh.invoke(o);
+ this.priv_field = (int) mh.invokeExact(o);
+ checkBadInvokeG(mh, this); // wrong nestmate
+ checkBadInvokeG(mh, mh); // completely wrong type
+
+ mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
+ mh.invoke(o, 2);
+ mh.invokeExact(o, 3);
+ checkBadInvokeS(mh, this); // wrong nestmate
+ checkBadInvokeS(mh, mh); // completely wrong type
+ }
+ }
+
+ static void checkBadInvokeG(MethodHandle mh, Object o) throws Throwable {
+ try {
+ int x = (int) mh.invoke(o);
+ throw new Error("Invoke on MethodHandle " + mh + " with receiver "
+ + o + "should have failed with ClassCastException!");
+ }
+ catch (ClassCastException expected) {
+ System.out.println("invoke got expected exception: " + expected);
+ }
+ }
+
+ static void checkBadInvokeS(MethodHandle mh, Object o) throws Throwable {
+ try {
+ mh.invoke(o, 42);
+ throw new Error("Invoke on MethodHandle " + mh + " with receiver "
+ + o + "should have failed with ClassCastException!");
+ }
+ catch (ClassCastException expected) {
+ System.out.println("invoke got expected exception: " + expected);
+ }
+ }
+
+ public static void main(String[] args) throws Throwable {
+ TestMethodHandles o = new TestMethodHandles();
+ StaticNested s = new StaticNested();
+ InnerNested i = o.new InnerNested();
+ StaticIface intf = new StaticIface() {};
+
+ o.access_priv(new TestMethodHandles());
+ o.access_priv(i);
+ o.access_priv(s);
+
+ s.access_priv(o);
+ s.access_priv(i);
+ s.access_priv(new StaticNested());
+
+ i.access_priv(o);
+ i.access_priv(o.new InnerNested());
+ i.access_priv(s);
+
+ intf.access_priv(o);
+ intf.access_priv(i);
+ intf.access_priv(s);
+ }
+}