1 /*
2 * Copyright (c) 2012, 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 7157626 8001112 8188870 8173382 8193290 8205619
27 * @summary Test major version for all legal combinations for -source and -target
28 * @author sgoel
29 *
30 * @modules jdk.compiler
31 */
32
33 import java.io.*;
34 import java.nio.*;
35 import java.util.*;
36 import java.util.regex.*;
37
38 /*
39 * If not explicitly specified the latest source and latest target
40 * values are the defaults. If explicitly specified, the target value
41 * has to be greater than or equal to the source value.
42 */
43 public class ClassVersionChecker {
44 private static enum Version {
45 SEVEN("7", 51),
46 EIGHT("8", 52),
47 NINE("9", 53),
48 TEN("10", 54),
49 ELEVEN("11", 55),
50 TWELVE("12", 56),
51 THIRTEEN("13", 57),
52 FOURTEEN("14", 58),
53 FIFTEEN("15", 59),
54 SIXTEEN("16", 60);
55
56 private Version(String release, int classFileVer) {
57 this.release = release;
58 this.classFileVer = classFileVer;
59 }
60 private final String release;
61 private final int classFileVer;
62
63 String release() {return release;}
64 int classFileVer() {return classFileVer;}
65 }
66
67 static final Version CURRENT;
68 static {
69 Version[] versions = Version.values();
70 int index = versions.length;
71 CURRENT = versions[index - 1];
72 }
73
74 int errors;
75
76 File javaFile = null;
77
78 public static void main(String[] args) throws Throwable {
79 new ClassVersionChecker().run();
80 }
81
82 void run() throws Exception {
83 writeTestFile();
84 /*
85 * Rules applicable for -source and -target combinations:
86 * 1. If both empty, version num is for the current release
87 * 2. If source is not empty and target is empty, version is
88 * based on the current release
89 * 3. If both non-empty, version is based on target
90 */
91 test("", "", CURRENT.classFileVer());
92 for (Version source : Version.values()) {
93 test(source.release(), "", CURRENT.classFileVer()); // no target
94 for (Version target : Version.values()) {
95 if (target.compareTo(source) < 0)
96 continue; // Target < source not a valid set of arguments
97 else {
98 logMsg("Running for src = " + source + " target = "+ target +
99 " expected = " + target.classFileVer());
100 test(source.release(), target.release(), target.classFileVer());
101 }
102 }
103 }
104
105 if (errors > 0)
106 throw new Exception(errors + " errors found");
107 }
108
109 void test(String i, String j, int expected) {
110 File classFile = compileTestFile(i, j, javaFile);
111 short majorVer = getMajorVersion(classFile);
112 checkVersion(majorVer, expected);
113 }
114
115 void writeTestFile() throws IOException {
116 javaFile = new File("Test.java");
117 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
118 out.println("class Test { ");
119 out.println(" public void foo() { }");
120 out.println("}");
121 } catch (IOException ioe) {
122 error("IOException while creating Test.java" + ioe);
123 }
124 }
125
126 File compileTestFile(String i, String j, File f) {
127 int rc = -1;
128 // Src and target are empty
129 if (i.isEmpty() && j.isEmpty() ) {
130 rc = compile("-g", f.getPath());
131 } else if( j.isEmpty()) { // target is empty
132 rc = compile("-source", i, "-g", f.getPath());
133 } else {
134 rc = compile("-source", i, "-target", j, "-g", f.getPath());
135 }
136 if (rc != 0)
137 throw new Error("compilation failed. rc=" + rc);
138 String path = f.getPath();
139 return new File(path.substring(0, path.length() - 5) + ".class");
140 }
141
142 int compile(String... args) {
143 return com.sun.tools.javac.Main.compile(args);
144 }
145
146 void logMsg (String str) {
147 System.out.println(str);
148 }
149
150 short getMajorVersion(File f) {
151 List<String> args = new ArrayList<String>();
152 short majorVer = 0;
153 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
154 in.readInt();
155 in.readShort();
156 majorVer = in.readShort();
157 System.out.println("major version:" + majorVer);
158 } catch (IOException e) {
159 error("IOException while reading Test.class" + e);
160 }
161 return majorVer;
162 }
163
164 void checkVersion(short majorVer, int expected) {
165 if (majorVer != expected ) {
166 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
167 }
168 }
169
170 void error(String msg) {
171 System.out.println("error: " + msg);
172 errors++;
173 }
174 }