1 /* 2 * Copyright (c) 2017, 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 package runtime.valhalla.valuetypes; 24 25 import java.lang.invoke.*; 26 import jdk.experimental.value.*; 27 28 import static jdk.test.lib.Asserts.*; 29 30 /* 31 * @test VboxUnbox 32 * @summary Exercise vbox & vunbox bytecodes 33 * @library /test/lib 34 * @build runtime.valhalla.valuetypes.ValueCapableClass 35 * @run main/othervm -Xint -noverify -XX:+EnableMVT runtime.valhalla.valuetypes.VboxUnbox 36 * @run main/othervm -Xcomp -noverify -XX:+EnableMVT runtime.valhalla.valuetypes.VboxUnbox 37 */ 38 public class VboxUnbox { 39 40 public static void main(String[] args) { 41 testCorrectBoxing(); 42 testIncorrectBoxing(); 43 } 44 45 public static void testCorrectBoxing() { 46 Class<?> vcc = ValueCapableClass.class; 47 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 48 49 MethodHandle newDvt = newDvtMh(dvt); 50 MethodHandle box = boxMh(dvt, vcc); 51 MethodHandle unbox = unboxMh(vcc, dvt); 52 53 ValueCapableClass newObject = ValueCapableClass.create(3, (short)7, (short)11); 54 ValueCapableClass newBoxed = null; 55 56 try { 57 ValueCapableClass boxed = (ValueCapableClass) MethodHandles.filterReturnValue(newDvt, box).invokeExact(); 58 // Assuming MVT1.0, where source has no way of holding an actual value at the language level, so: box(unbox(Object)) 59 newBoxed = (ValueCapableClass) MethodHandles.filterReturnValue(unbox, box).invokeExact(newObject); 60 } 61 catch (Throwable t) { fail("Invokation Exception", t); } 62 63 assertTrue(newObject.getX() == newBoxed.getX()); 64 assertTrue(newObject.getY() == newBoxed.getY()); 65 assertTrue(newObject.getZ() == newBoxed.getZ()); 66 } 67 68 public static void testIncorrectBoxing() { 69 Class<?> vcc = ValueCapableClass.class; 70 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 71 72 MethodHandle newDvt = newDvtMh(dvt); 73 MethodHandle box = boxMh(dvt, String.class); // Illegal box type 74 try { 75 MethodHandles.filterReturnValue(newDvt, box).invoke(); 76 fail("Expected ClassCastException"); 77 } 78 catch (ClassCastException cce) {} 79 catch (Throwable t) { fail("Invokation Exception", t); } 80 81 // With -verify, this test will yield a VerifyError 82 // since the constant pool entry at the index is not a 83 // symbolic reference to a direct value class type. 84 MethodHandle unbox = unboxMh(vcc, String.class); // Illegal unbox type 85 try { 86 unbox.invoke(ValueCapableClass.create()); 87 fail("Expected ClassCastException"); 88 } 89 catch (ClassCastException cce) {} 90 catch (Throwable t) { fail("Invokation Exception", t); } 91 } 92 93 /* 94 Create new DVT via loading a value array element. Why this workaround: 95 1) to avoid "ValueType.defaultValueConstant()" which may or may not be implemented with vunbox 96 */ 97 public static MethodHandle newDvtMh(Class<?> dvt) { 98 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "newDvt", MethodType.methodType(dvt), CODE->{ 99 CODE.iconst_1().anewarray(dvt).iconst_0().vaload().vreturn(); 100 }); 101 } 102 103 public static MethodHandle boxMh(Class<?> inClass, Class<?> outClass) { 104 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 105 CODE.vload(0).vbox(outClass).areturn(); 106 }); 107 } 108 109 public static MethodHandle unboxMh(Class<?> inClass, Class<?> outClass) { 110 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 111 CODE.aload(0).vunbox(outClass).vreturn(); 112 }); 113 } 114 115 }