1 /*
2 * Copyright (c) 2013, 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 8011805
27 * @summary Update sun.tools.java class file reading/writing support to include
28 * the new constant pool entries (including invokedynamic)
29 * @modules jdk.rmic/sun.rmi.rmic
30 * jdk.rmic/sun.tools.java
31 * @run main CFCTest
32 */
33
34 import java.io.DataInputStream;
35 import java.io.EOFException;
36 import java.io.File;
37 import java.io.FileInputStream;
38 import java.io.IOException;
39 import sun.tools.java.ClassDeclaration;
40 import sun.tools.java.Identifier;
41 import sun.rmi.rmic.BatchEnvironment;
42
43 public class CFCTest {
44
45 /* Constant table */
46 private static final int CONSTANT_UTF8 = 1;
47 private static final int CONSTANT_INTEGER = 3;
48 private static final int CONSTANT_FLOAT = 4;
49 private static final int CONSTANT_LONG = 5;
50 private static final int CONSTANT_DOUBLE = 6;
51 private static final int CONSTANT_CLASS = 7;
52 private static final int CONSTANT_STRING = 8;
53 private static final int CONSTANT_FIELD = 9;
54 private static final int CONSTANT_METHOD = 10;
55 private static final int CONSTANT_INTERFACEMETHOD = 11;
56 private static final int CONSTANT_NAMEANDTYPE = 12;
57 private static final int CONSTANT_METHODHANDLE = 15;
58 private static final int CONSTANT_METHODTYPE = 16;
59 private static final int CONSTANT_INVOKEDYNAMIC = 18;
60
61 String testClassName = this.getClass().getCanonicalName();
62 String testClassPath = System.getProperty("test.classes", ".");
63
64 interface I {
65 int get();
66 }
67
68 public static void main(String[] args) throws Exception {
69 new CFCTest().testNewConstants();
70 }
71
72 void testNewConstants() throws Exception {
73 // Presence of lambda causes new constant pool constant types to be used
74 I lam = () -> 88;
75 if (lam.get() == 88) {
76 System.out.println("Sanity passed: Lambda worked.");
77 } else {
78 throw new RuntimeException("Sanity failed: bad lambda execution");
79 }
80
81 // Verify that all the new constant pool constant types are present
82 String clsName = testClassPath + File.separator + testClassName + ".class";
83 ClassConstantChecker ccc = new ClassConstantChecker(clsName);
84 ccc.checkFound(CONSTANT_METHODHANDLE);
85 ccc.checkFound(CONSTANT_METHODTYPE);
86 ccc.checkFound(CONSTANT_INVOKEDYNAMIC);
87
88 // Heart of test: read the class file with the new constant types
89 exerciseClassDefinition();
90 System.out.println("ClassDefinition read without failure.\n");
91 }
92
93 /**
94 * Failure is seen when getClassDefinition causes class read
95 */
96 void exerciseClassDefinition() throws Exception {
97 BatchEnvironment env = new BatchEnvironment(System.out,
98 BatchEnvironment.createClassPath(testClassPath, null),
99 null);
100 try {
101 ClassDeclaration decl = env.getClassDeclaration(
102 Identifier.lookup(testClassName));
103 decl.getClassDefinition(env);
104 } finally {
105 env.flushErrors();
106 env.shutdown();
107 }
108 }
109
110 private class ClassConstantChecker {
111
112 private DataInputStream in;
113 private boolean[] found;
114
115 ClassConstantChecker(String clsName) throws IOException {
116 in = new DataInputStream(new FileInputStream(clsName));
117 found = new boolean[CONSTANT_INVOKEDYNAMIC + 20];
118 try {
119 check();
120 } finally {
121 in.close();
122 }
123 }
124
125 void checkFound(int tag) throws Exception {
126 if (found[tag]) {
127 System.out.printf("Constant pool tag found: %d\n", tag);
128 } else {
129 throw new RuntimeException("Insufficient test, constant pool tag NOT found: " + tag);
130 }
131 }
132
133 private void skip(int n) throws IOException {
134 if (in.skipBytes(n) != n) {
135 throw new EOFException();
136 }
137 }
138
139 private void check() throws IOException {
140 skip(8); // magic, version
141 int count = in.readUnsignedShort();
142 for (int i = 1; i < count; i++) {
143 int j = i;
144 // JVM 4.4 cp_info.tag
145 int tag = in.readByte();
146 found[tag] = true;
147 switch (tag) {
148 case CONSTANT_UTF8:
149 in.readUTF();
150 break;
151 case CONSTANT_LONG:
152 case CONSTANT_DOUBLE:
153 skip(8);
154 break;
155 case CONSTANT_CLASS:
156 case CONSTANT_STRING:
157 skip(2);
158 break;
159 case CONSTANT_INTEGER:
160 case CONSTANT_FLOAT:
161 case CONSTANT_FIELD:
162 case CONSTANT_METHOD:
163 case CONSTANT_INTERFACEMETHOD:
164 case CONSTANT_NAMEANDTYPE:
165 skip(4);
166 break;
167
168 case CONSTANT_METHODHANDLE:
169 skip(3);
170 break;
171 case CONSTANT_METHODTYPE:
172 skip(2);
173 break;
174 case CONSTANT_INVOKEDYNAMIC:
175 skip(4);
176 break;
177
178 case 0:
179 default:
180 throw new ClassFormatError("invalid constant type: " + tag);
181 }
182 }
183 }
184 }
185 }