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 27 import jdk.experimental.value.MethodHandleBuilder; 28 import jdk.incubator.mvt.ValueType; 29 30 import static jdk.test.lib.Asserts.*; 31 32 /* 33 * @test VboxUnbox 34 * @summary Exercise vbox & vunbox bytecodes 35 * @modules java.base/jdk.experimental.value 36 * jdk.incubator.mvt 37 * @library /test/lib 38 * @build runtime.valhalla.valuetypes.ValueCapableClass 39 * @run main/othervm -Xint -noverify -XX:+EnableMVT runtime.valhalla.valuetypes.VboxUnbox 40 * @run main/othervm -Xcomp -noverify -XX:+EnableMVT runtime.valhalla.valuetypes.VboxUnbox 41 */ 42 public class VboxUnbox { 43 44 public static void main(String[] args) { 45 testCorrectBoxing(); 46 testIncorrectBoxing(); 47 } 48 49 public static void testCorrectBoxing() { 50 Class<?> vcc = ValueCapableClass.class; 51 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 52 53 MethodHandle newDvt = newDvtMh(dvt); 54 MethodHandle box = boxMh(dvt, vcc); 55 MethodHandle unbox = unboxMh(vcc, dvt); 56 57 ValueCapableClass newObject = ValueCapableClass.create(3, (short)7, (short)11); 58 ValueCapableClass newBoxed = null; 59 60 try { 61 ValueCapableClass boxed = (ValueCapableClass) MethodHandles.filterReturnValue(newDvt, box).invokeExact(); 62 // Assuming MVT1.0, where source has no way of holding an actual value at the language level, so: box(unbox(Object)) 63 newBoxed = (ValueCapableClass) MethodHandles.filterReturnValue(unbox, box).invokeExact(newObject); 64 } 65 catch (Throwable t) { fail("Invokation Exception", t); } 66 67 assertTrue(newObject.getX() == newBoxed.getX()); 68 assertTrue(newObject.getY() == newBoxed.getY()); 69 assertTrue(newObject.getZ() == newBoxed.getZ()); 70 } 71 72 public static void testIncorrectBoxing() { 73 Class<?> vcc = ValueCapableClass.class; 74 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 75 76 MethodHandle newDvt = newDvtMh(dvt); 77 MethodHandle box = boxMh(dvt, String.class); // Illegal box type 78 try { 79 MethodHandles.filterReturnValue(newDvt, box).invoke(); 80 fail("Expected ClassCastException"); 81 } 82 catch (ClassCastException cce) {} 83 catch (Throwable t) { fail("Invokation Exception", t); } 84 85 // With -verify, this test will yield a VerifyError 86 // since the constant pool entry at the index is not a 87 // symbolic reference to a direct value class type. 88 MethodHandle unbox = unboxMh(vcc, String.class); // Illegal unbox type 89 try { 90 unbox.invoke(ValueCapableClass.create()); 91 fail("Expected ClassCastException"); 92 } 93 catch (ClassCastException cce) {} 94 catch (Throwable t) { fail("Invokation Exception", t); } 95 } 96 97 /* 98 Create new DVT via loading a value array element. Why this workaround: 99 1) to avoid "ValueType.defaultValueConstant()" which may or may not be implemented with vunbox 100 */ 101 public static MethodHandle newDvtMh(Class<?> dvt) { 102 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "newDvt", MethodType.methodType(dvt), CODE->{ 103 CODE.iconst_1().anewarray(dvt).iconst_0().vaload().vreturn(); 104 }); 105 } 106 107 public static MethodHandle boxMh(Class<?> inClass, Class<?> outClass) { 108 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 109 CODE.vload(0).vbox(outClass).areturn(); 110 }); 111 } 112 113 public static MethodHandle unboxMh(Class<?> inClass, Class<?> outClass) { 114 return MethodHandleBuilder.loadCode(MethodHandles.lookup(), "box", MethodType.methodType(outClass, inClass), CODE->{ 115 CODE.aload(0).vunbox(outClass).vreturn(); 116 }); 117 } 118 119 }