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 MethodHandle unbox = unboxMh(vcc, String.class); // Illegal unbox type 82 try { 83 unbox.invoke(ValueCapableClass.create()); 84 fail("Expected ClassCastException"); 85 } 86 catch (ClassCastException cce) {} 87 catch (Throwable t) { fail("Invokation Exception", t); } 88 } 89 90 /* 91 Create new DVT via loading a value array element. Why this workaround: 92 1) to avoid "ValueType.defaultValueConstant()" which may or may not be implemented with vunbox 93 2) vnew requires valuefactory attribute, which at the time of writing isn't generated with the DVT 94 3) vdefault doesn't exist at the time of writing 95 */ 96 public static MethodHandle newDvtMh(Class<?> dvt) { 97 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "newDvt", MethodType.methodType(dvt), CODE->{ 98 CODE.iconst_1().anewarray(dvt).iconst_0().vaload().vreturn(); 99 }); 100 } 101 102 public static MethodHandle boxMh(Class<?> inClass, Class<?> outClass) { 103 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 104 CODE.vload(0).vbox(outClass).areturn(); 105 }); 106 } 107 108 public static MethodHandle unboxMh(Class<?> inClass, Class<?> outClass) { 109 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 110 CODE.aload(0).vunbox(outClass).vreturn(); 111 }); 112 } 113 114 }