| /* |
| * 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 |
| * @summary unit tests for java.lang.invoke.MethodHandles |
| * @library /lib/testlibrary /java/lang/invoke/common |
| * @compile MethodHandlesTest.java MethodHandlesCastFailureTest.java remote/RemoteExample.java |
| * @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions |
| * -XX:-VerifyDependencies |
| * -esa |
| * test.java.lang.invoke.MethodHandlesCastFailureTest |
| */ |
| |
| package test.java.lang.invoke; |
| |
| import org.junit.*; |
| import test.java.lang.invoke.lib.CodeCacheOverflowProcessor; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| |
| import static org.junit.Assert.*; |
| |
| public class MethodHandlesCastFailureTest extends MethodHandlesTest { |
| |
| @Test // SLOW |
| public void testCastFailure() throws Throwable { |
| CodeCacheOverflowProcessor.runMHTest(this::testCastFailure0); |
| } |
| |
| public void testCastFailure0() throws Throwable { |
| if (CAN_SKIP_WORKING) return; |
| startTest("testCastFailure"); |
| testCastFailure("cast/argument", 11000); |
| if (CAN_TEST_LIGHTLY) return; |
| testCastFailure("unbox/argument", 11000); |
| testCastFailure("cast/return", 11000); |
| testCastFailure("unbox/return", 11000); |
| } |
| |
| static class Surprise { |
| public MethodHandle asMethodHandle() { |
| return VALUE.bindTo(this); |
| } |
| Object value(Object x) { |
| trace("value", x); |
| if (boo != null) return boo; |
| return x; |
| } |
| Object boo; |
| void boo(Object x) { boo = x; } |
| |
| static void trace(String x, Object y) { |
| if (verbosity > 8) System.out.println(x+"="+y); |
| } |
| static Object refIdentity(Object x) { trace("ref.x", x); return x; } |
| static Integer boxIdentity(Integer x) { trace("box.x", x); return x; } |
| static int intIdentity(int x) { trace("int.x", x); return x; } |
| static MethodHandle VALUE, REF_IDENTITY, BOX_IDENTITY, INT_IDENTITY; |
| static { |
| try { |
| VALUE = PRIVATE.findVirtual( |
| Surprise.class, "value", |
| MethodType.methodType(Object.class, Object.class)); |
| REF_IDENTITY = PRIVATE.findStatic( |
| Surprise.class, "refIdentity", |
| MethodType.methodType(Object.class, Object.class)); |
| BOX_IDENTITY = PRIVATE.findStatic( |
| Surprise.class, "boxIdentity", |
| MethodType.methodType(Integer.class, Integer.class)); |
| INT_IDENTITY = PRIVATE.findStatic( |
| Surprise.class, "intIdentity", |
| MethodType.methodType(int.class, int.class)); |
| } catch (NoSuchMethodException | IllegalAccessException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| } |
| |
| @SuppressWarnings("ConvertToStringSwitch") |
| void testCastFailure(String mode, int okCount) throws Throwable { |
| countTest(false); |
| if (verbosity > 2) System.out.println("mode="+mode); |
| Surprise boo = new Surprise(); |
| MethodHandle identity = Surprise.REF_IDENTITY, surprise0 = boo.asMethodHandle(), surprise = surprise0; |
| if (mode.endsWith("/return")) { |
| if (mode.equals("unbox/return")) { |
| // fail on return to ((Integer)surprise).intValue |
| surprise = surprise.asType(MethodType.methodType(int.class, Object.class)); |
| identity = identity.asType(MethodType.methodType(int.class, Object.class)); |
| } else if (mode.equals("cast/return")) { |
| // fail on return to (Integer)surprise |
| surprise = surprise.asType(MethodType.methodType(Integer.class, Object.class)); |
| identity = identity.asType(MethodType.methodType(Integer.class, Object.class)); |
| } |
| } else if (mode.endsWith("/argument")) { |
| MethodHandle callee = null; |
| if (mode.equals("unbox/argument")) { |
| // fail on handing surprise to int argument |
| callee = Surprise.INT_IDENTITY; |
| } else if (mode.equals("cast/argument")) { |
| // fail on handing surprise to Integer argument |
| callee = Surprise.BOX_IDENTITY; |
| } |
| if (callee != null) { |
| callee = callee.asType(MethodType.genericMethodType(1)); |
| surprise = MethodHandles.filterArguments(callee, 0, surprise); |
| identity = MethodHandles.filterArguments(callee, 0, identity); |
| } |
| } |
| assertNotSame(mode, surprise, surprise0); |
| identity = identity.asType(MethodType.genericMethodType(1)); |
| surprise = surprise.asType(MethodType.genericMethodType(1)); |
| Object x = 42; |
| for (int i = 0; i < okCount; i++) { |
| Object y = identity.invokeExact(x); |
| assertEquals(x, y); |
| Object z = surprise.invokeExact(x); |
| assertEquals(x, z); |
| } |
| boo.boo("Boo!"); |
| Object y = identity.invokeExact(x); |
| assertEquals(x, y); |
| try { |
| Object z = surprise.invokeExact(x); |
| System.out.println("Failed to throw; got z="+z); |
| assertTrue(false); |
| } catch (ClassCastException ex) { |
| if (verbosity > 2) |
| System.out.println("caught "+ex); |
| if (verbosity > 3) |
| ex.printStackTrace(System.out); |
| assertTrue(true); // all is well |
| } |
| } |
| } |