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 /java/lang/invoke/common
29 * @enablePreview
30 * @run testng CondyWrongType
31 * @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:UseBootstrapCallInfo=3 CondyWrongType
32 */
33
34 import org.testng.Assert;
35 import org.testng.annotations.DataProvider;
36 import org.testng.annotations.Test;
37 import test.java.lang.invoke.lib.InstructionHelper;
38
39 import java.lang.invoke.MethodHandle;
40 import java.lang.invoke.MethodHandles;
41 import java.lang.invoke.MethodType;
42 import java.lang.invoke.WrongMethodTypeException;
43 import java.math.BigDecimal;
44 import java.util.ArrayList;
45 import java.util.List;
46 import java.util.Map;
47
48 import static java.lang.invoke.MethodType.methodType;
49
50 public class CondyWrongType {
51
52 @DataProvider
53 public Object[][] primitivesProvider() throws Exception {
54 Map<String, Class<?>> typeMap = Map.of(
55 "B", byte.class,
56 "C", char.class,
57 "D", double.class,
58 "F", float.class,
59 "I", int.class,
60 "J", long.class,
61 "S", short.class,
62 "Z", boolean.class
63 );
64
65 List<Object[]> cases = new ArrayList<>();
66 for (String name : typeMap.keySet()) {
67 MethodHandle zero = MethodHandles.zero(typeMap.get(name));
68 for (String type : typeMap.keySet()) {
69 // Use asType transformation to detect if primitive conversion
70 // is supported from the BSM value type to the dynamic constant type
71 boolean pass = true;
72 try {
73 zero.asType(MethodType.methodType(typeMap.get(type)));
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 } catch (Throwable t) {
113 caught = t;
114 }
115
116 if (caught == null) {
117 if (pass) {
118 return;
119 } else {
120 Assert.fail("Throwable expected");
121 }
122 } else if (pass) {
123 Assert.fail("Throwable not expected");
124 }
125
126 Assert.assertTrue(BootstrapMethodError.class.isAssignableFrom(caught.getClass()));
127 caught = caught.getCause();
128 Assert.assertNotNull(caught);
129 Assert.assertTrue(ClassCastException.class.isAssignableFrom(caught.getClass()));
130 }
131
132 static Object bsm(MethodHandles.Lookup l, String name, Class<?> type) {
133 switch (name) {
134 case "B":
135 return (byte) 1;
136 case "C":
137 return 'A';
138 case "D":
139 return 1.0;
140 case "F":
141 return 1.0f;
142 case "I":
143 return 1;
144 case "J":
145 return 1L;
146 case "S":
147 return (short) 1;
148 case "Z":
149 return true;
150 case "String":
151 return "string";
152 case "BigDecimal":
153 return BigDecimal.ONE;
154 default:
155 throw new UnsupportedOperationException();
156 }
157 }
158
159 static MethodHandle caster(String name, String type) {
160 try {
161 return InstructionHelper.ldcDynamicConstant(
162 MethodHandles.lookup(),
163 name, type,
164 "bsm",
165 methodType(Object.class, MethodHandles.Lookup.class, String.class, Class.class).descriptorString());
166 } catch (Exception e) {
167 throw new Error(e);
168 }
169 }
170 }