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
24 /*
25 * @test
26 * @bug 8186046
27 * @summary Test bootstrap methods returning the wrong type
28 * @library /lib/testlibrary/bytecode /java/lang/invoke/common
29 * @build jdk.experimental.bytecode.BasicClassBuilder test.java.lang.invoke.lib.InstructionHelper
30 * @run testng CondyWrongType
31 */
32
33 import org.testng.Assert;
34 import org.testng.annotations.DataProvider;
35 import org.testng.annotations.Test;
36 import test.java.lang.invoke.lib.InstructionHelper;
37
38 import java.lang.invoke.MethodHandle;
39 import java.lang.invoke.MethodHandles;
40 import java.lang.invoke.MethodType;
41 import java.lang.invoke.WrongMethodTypeException;
42 import java.math.BigDecimal;
43 import java.util.ArrayList;
44 import java.util.List;
45 import java.util.Map;
46
47 import static java.lang.invoke.MethodType.methodType;
48
49 public class CondyWrongType {
50
51 @DataProvider
52 public Object[][] primitivesProvider() throws Exception {
53 Map<String, Class<?>> typeMap = Map.of(
54 "B", byte.class,
55 "C", char.class,
56 "D", double.class,
57 "F", float.class,
58 "I", int.class,
59 "J", long.class,
60 "S", short.class,
61 "Z", boolean.class
62 );
63
64 List<Object[]> cases = new ArrayList<>();
65 for (String name : typeMap.keySet()) {
66 MethodHandle zero = MethodHandles.zero(typeMap.get(name));
67 for (String type : typeMap.keySet()) {
68 // Use asType transformation to detect if primitive conversion
69 // is supported from the BSM value type to the dynamic constant type
70 boolean pass = true;
71 try {
72 zero.asType(MethodType.methodType(typeMap.get(type)));
73 }
74 catch (WrongMethodTypeException e) {
75 pass = false;
76 }
77 cases.add(new Object[] { name, type, pass});
78 }
79 }
80
81 return cases.stream().toArray(Object[][]::new);
82 }
83
84 @Test(dataProvider = "primitivesProvider")
85 public void testPrimitives(String name, String type, boolean pass) {
86 test(name, type, pass);
87 }
88
89 @Test
90 public void testReferences() {
91 test("String", "Ljava/math/BigDecimal;", false);
92 test("BigDecimal", "Ljava/lang/String;", false);
93 }
94
95 @Test
96 public void testReferenceAndPrimitives() {
97 test("String", "B", false);
98 test("String", "C", false);
99 test("String", "D", false);
100 test("String", "F", false);
101 test("String", "I", false);
102 test("String", "J", false);
103 test("String", "S", false);
104 test("String", "Z", false);
105 }
106
107 static void test(String name, String type, boolean pass) {
108 MethodHandle mh = caster(name, type);
109 Throwable caught = null;
110 try {
111 mh.invoke();
112 }
113 catch (Throwable t) {
114 caught = t;
115 }
116
117 if (caught == null) {
118 if (pass) {
119 return;
120 }
121 else {
122 Assert.fail("Throwable expected");
123 }
124 }
125 else if (pass) {
126 Assert.fail("Throwable not expected");
127 }
128
129 Assert.assertTrue(BootstrapMethodError.class.isAssignableFrom(caught.getClass()));
130 caught = caught.getCause();
131 Assert.assertNotNull(caught);
132 Assert.assertTrue(ClassCastException.class.isAssignableFrom(caught.getClass()));
133 }
134
135 static Object bsm(MethodHandles.Lookup l, String name, Class<?> type) {
136 switch (name) {
137 case "B":
138 return (byte) 1;
139 case "C":
140 return 'A';
141 case "D":
142 return 1.0;
143 case "F":
144 return 1.0f;
145 case "I":
146 return 1;
147 case "J":
148 return 1L;
149 case "S":
150 return (short) 1;
151 case "Z":
152 return true;
153 case "String":
154 return "string";
155 case "BigDecimal":
156 return BigDecimal.ONE;
157 default:
158 throw new UnsupportedOperationException();
159 }
160 }
161
162 static MethodHandle caster(String name, String type) {
163 try {
164 return InstructionHelper.ldcDynamicConstant(
165 MethodHandles.lookup(),
166 name, type,
167 "bsm", methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).toMethodDescriptorString(),
168 S -> { });
169 } catch (Exception e) {
170 throw new Error(e);
171 }
172 }
173 }