1 /* 2 * Copyright (c) 2016, 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 /testlibrary / 34 * @build runtime.valhalla.valuetypes.ValueCapableClass 35 * @run main/othervm -Xint -noverify runtime.valhalla.valuetypes.VboxUnbox 36 * 37 * To dump generated byte-code, add "-Dvalhalla.dumpIsolatedMethodClasses=/tmp/foo" 38 */ 39 public class VboxUnbox { 40 41 public static void main(String[] args) { 42 testCorrectBoxing(); 43 testIncorrectBoxing(); 44 } 45 46 public static void testCorrectBoxing() { 47 Class<?> vcc = ValueCapableClass.class; 48 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 49 50 MethodHandle newDvt = newDvtMh(dvt); 51 MethodHandle box = boxMh(dvt, vcc); 52 MethodHandle unbox = unboxMh(vcc, dvt); 53 54 ValueCapableClass newObject = ValueCapableClass.create(3, (short)7, (short)11); 55 ValueCapableClass newBoxed = null; 56 57 try { 58 ValueCapableClass boxed = (ValueCapableClass) MethodHandles.filterReturnValue(newDvt, box).invokeExact(); 59 // Assuming MVT1.0, where source has no way of holding an actual value at the language level, so: box(unbox(Object)) 60 newBoxed = (ValueCapableClass) MethodHandles.filterReturnValue(unbox, box).invokeExact(newObject); 61 } 62 catch (Throwable t) { fail("Invokation Exception", t); } 63 64 assertTrue(newObject.getX() == newBoxed.getX()); 65 assertTrue(newObject.getY() == newBoxed.getY()); 66 assertTrue(newObject.getZ() == newBoxed.getZ()); 67 } 68 69 public static void testIncorrectBoxing() { 70 Class<?> vcc = ValueCapableClass.class; 71 Class<?> dvt = ValueType.forClass(vcc).valueClass(); 72 73 MethodHandle newDvt = newDvtMh(dvt); 74 MethodHandle box = boxMh(dvt, String.class); // Illegal box type 75 try { 76 MethodHandles.filterReturnValue(newDvt, box).invoke(); 77 error("Expected ClassCastException"); 78 } 79 catch (ClassCastException cce) {} 80 catch (Throwable t) { fail("Invokation Exception", t); } 81 82 MethodHandle unbox = unboxMh(vcc, String.class); // Illegal unbox type 83 try { 84 unbox.invoke(ValueCapableClass.create()); 85 error("Expected ClassCastException"); 86 } 87 catch (ClassCastException cce) {} 88 catch (Throwable t) { fail("Invokation Exception", t); } 89 } 90 91 /* 92 Create new DVT via loading a value array element. Why this workaround: 93 1) to avoid "ValueType.defaultValueConstant()" which may or may not be implemented with vunbox 94 2) vnew requires valuefactory attribute, which at the time of writing isn't generated with the DVT 95 3) vdefault doesn't exist at the time of writing 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 /* 116 TODO: Current repo state doesn't pick up the common test/lib Asserts 117 remove this implementation when fixed 118 */ 119 public static void fail(String msg, Throwable thr) { // Missing Asserts.fail(String, Throwable) 120 throw new RuntimeException(msg, thr); 121 } 122 public static void error(String msg) { // Missing Asserts.error(String) 123 throw new RuntimeException(msg); 124 } 125 }