1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8019184 27 * @summary MethodHandles.catchException() fails when methods have 8 args + varargs 28 */ 29 30 import java.util.*; 31 import java.lang.invoke.*; 32 33 public class TestCatchExceptionWithVarargs { 34 35 private static final Class<?> CLASS = TestCatchExceptionWithVarargs.class; 36 private static final int MAX_MH_ARITY = 254; 37 38 public static MethodHandle target; 39 public static MethodHandle handler; 40 41 private static Object firstArg; 42 43 static class MyException extends Exception { 44 } 45 46 public static Object target(Object... a) throws Exception { 47 if (a[0] != firstArg) { 48 throw new AssertionError("first argument different than expected: " + a[0] + " != " + firstArg); 49 } 50 throw new MyException(); 51 } 52 53 public static Object handler(Object... a) { 54 if (a[0] != firstArg) { 55 throw new AssertionError("first argument different than expected: " + a[0] + " != " + firstArg); 56 } 57 return a[0]; 58 } 59 60 static { 61 try { 62 MethodType mtype = MethodType.methodType(Object.class, Object[].class); 63 target = MethodHandles.lookup().findStatic(CLASS, "target", mtype); 64 handler = MethodHandles.lookup().findStatic(CLASS, "handler", mtype); 65 } catch (Exception e) { 66 throw new AssertionError(e); 67 } 68 } 69 70 public static void main(String[] args) throws Throwable { 71 List<Class<?>> ptypes = new LinkedList<>(); 72 ptypes.add(Object[].class); 73 74 // We use MAX_MH_ARITY - 1 here to account for the Object[] argument. 75 for (int i = 1; i < MAX_MH_ARITY - 1; i++) { 76 ptypes.add(0, Object.class); 77 78 MethodHandle targetWithArgs = target.asType(MethodType.methodType(Object.class, ptypes)); 79 MethodHandle handlerWithArgs = handler.asType(MethodType.methodType(Object.class, ptypes)); 80 handlerWithArgs = MethodHandles.dropArguments(handlerWithArgs, 0, MyException.class); 81 82 MethodHandle gwc1 = MethodHandles.catchException(targetWithArgs, MyException.class, handlerWithArgs); 83 84 // The next line throws an IllegalArgumentException if there is a bug. 85 MethodHandle gwc2 = MethodHandles.catchException(gwc1, MyException.class, handlerWithArgs); 86 87 // This is only to verify that the method handles can actually be invoked and do the right thing. 88 firstArg = new Object(); 89 Object o = gwc2.asSpreader(Object[].class, ptypes.size() - 1).invoke(firstArg, new Object[i]); 90 if (o != firstArg) { 91 throw new AssertionError("return value different than expected: " + o + " != " + firstArg); 92 } 93 } 94 } 95 }