|
1 /* |
|
2 * Copyright (c) 2013, 2019, 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 8231827 |
|
27 * @summary Ensure the LV table entries are generated for bindings |
|
28 * @modules jdk.jdeps/com.sun.tools.classfile |
|
29 * @compile -g --enable-preview -source ${jdk.version} LocalVariableTable.java |
|
30 * @run main/othervm --enable-preview LocalVariableTable |
|
31 */ |
|
32 |
|
33 import java.io.*; |
|
34 import java.lang.annotation.*; |
|
35 import java.util.*; |
|
36 import com.sun.tools.classfile.*; |
|
37 |
|
38 /* |
|
39 * The test checks that a LocalVariableTable attribute is generated for the |
|
40 * method bodies containing patterns, and checks that the expected |
|
41 * set of entries is found in the attribute. |
|
42 * |
|
43 * The test looks for test cases represented by nested classes whose |
|
44 * name begins with "Pattern". Each such class contains a method |
|
45 * with patterns, and because the test is compiled |
|
46 * with -g, these methods should have a LocalVariableTable. The set of |
|
47 * expected names in the LVT is provided in an annotation on the class for |
|
48 * the test case. |
|
49 */ |
|
50 //Copied from: test/langtools/tools/javac/lambda/LocalVariableTable.java |
|
51 public class LocalVariableTable { |
|
52 public static void main(String... args) throws Exception { |
|
53 new LocalVariableTable().run(); |
|
54 } |
|
55 |
|
56 void run() throws Exception { |
|
57 // the declared classes are returned in an unspecified order, |
|
58 // so for neatness, sort them by name before processing them |
|
59 Class<?>[] classes = getClass().getDeclaredClasses(); |
|
60 Arrays.sort(classes, (c1, c2) -> c1.getName().compareTo(c2.getName())); |
|
61 |
|
62 for (Class<?> c : classes) { |
|
63 if (c.getSimpleName().startsWith("Pattern")) |
|
64 check(c); |
|
65 } |
|
66 if (errors > 0) |
|
67 throw new Exception(errors + " errors found"); |
|
68 } |
|
69 |
|
70 /** Check an individual test case. */ |
|
71 void check(Class<?> c) throws Exception { |
|
72 System.err.println("Checking " + c.getSimpleName()); |
|
73 |
|
74 Expect expect = c.getAnnotation(Expect.class); |
|
75 if (expect == null) { |
|
76 error("@Expect not found for class " + c.getSimpleName()); |
|
77 return; |
|
78 } |
|
79 |
|
80 ClassFile cf = ClassFile.read(getClass().getResource(c.getName() + ".class").openStream()); |
|
81 Method m = getMethodByName(cf, c.getSimpleName().contains("Lambda") ? "lambda$" : "test"); |
|
82 if (m == null) { |
|
83 error("test method not found"); |
|
84 return; |
|
85 } |
|
86 |
|
87 Code_attribute code = (Code_attribute) m.attributes.get(Attribute.Code); |
|
88 if (code == null) { |
|
89 error("Code attribute not found"); |
|
90 return; |
|
91 } |
|
92 |
|
93 LocalVariableTable_attribute lvt = |
|
94 (LocalVariableTable_attribute) code.attributes.get(Attribute.LocalVariableTable); |
|
95 if (lvt == null) { |
|
96 error("LocalVariableTable attribute not found"); |
|
97 return; |
|
98 } |
|
99 |
|
100 Set<String> foundNames = new LinkedHashSet<>(); |
|
101 for (LocalVariableTable_attribute.Entry e: lvt.local_variable_table) { |
|
102 foundNames.add(cf.constant_pool.getUTF8Value(e.name_index)); |
|
103 } |
|
104 |
|
105 Set<String> expectNames = new LinkedHashSet<>(Arrays.asList(expect.value())); |
|
106 if (!foundNames.equals(expectNames)) { |
|
107 Set<String> foundOnly = new LinkedHashSet<>(foundNames); |
|
108 foundOnly.removeAll(expectNames); |
|
109 for (String s: foundOnly) |
|
110 error("Unexpected name found: " + s); |
|
111 Set<String> expectOnly = new LinkedHashSet<>(expectNames); |
|
112 expectOnly.removeAll(foundNames); |
|
113 for (String s: expectOnly) |
|
114 error("Expected name not found: " + s); |
|
115 } |
|
116 } |
|
117 |
|
118 Method getMethodByName(ClassFile cf, String name) throws ConstantPoolException { |
|
119 for (Method m: cf.methods) { |
|
120 if (m.getName(cf.constant_pool).startsWith(name)) |
|
121 return m; |
|
122 } |
|
123 return null; |
|
124 } |
|
125 |
|
126 /** Report an error. */ |
|
127 void error(String msg) { |
|
128 System.err.println("Error: " + msg); |
|
129 errors++; |
|
130 } |
|
131 |
|
132 int errors; |
|
133 |
|
134 /** |
|
135 * Annotation used to provide the set of names expected in the LVT attribute. |
|
136 */ |
|
137 @Retention(RetentionPolicy.RUNTIME) |
|
138 @interface Expect { |
|
139 String[] value(); |
|
140 } |
|
141 |
|
142 /* |
|
143 * ---------- Test cases --------------------------------------------------- |
|
144 */ |
|
145 |
|
146 @Expect({ "o", "s" }) |
|
147 static class Pattern_Simple { |
|
148 public static void test(Object o) { |
|
149 if (o instanceof String s) {} |
|
150 } |
|
151 } |
|
152 |
|
153 @Expect({ "s" }) |
|
154 static class Pattern_Lambda { |
|
155 public static void test(Object o) { |
|
156 if (o instanceof String s) { |
|
157 Runnable r = () -> { |
|
158 s.length(); |
|
159 }; |
|
160 } |
|
161 } |
|
162 } |
|
163 |
|
164 } |
|
165 |