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