1 /*
2 * Copyright (c) 2012, 2018, 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
52 private Version(String release, int classFileVer) {
53 this.release = release;
54 this.classFileVer = classFileVer;
55 }
56 private final String release;
57 private final int classFileVer;
58
59 String release() {return release;}
60 int classFileVer() {return classFileVer;}
61 }
62
63 static final Version CURRENT;
64 static {
65 Version[] versions = Version.values();
66 int index = versions.length;
67 CURRENT = versions[index - 1];
68 }
69
70 int errors;
71
72 File javaFile = null;
73
74 public static void main(String[] args) throws Throwable {
75 new ClassVersionChecker().run();
76 }
77
78 void run() throws Exception {
79 writeTestFile();
80 /*
81 * Rules applicable for -source and -target combinations:
82 * 1. If both empty, version num is for the current release
83 * 2. If source is not empty and target is empty, version is
84 * based on the current release
85 * 3. If both non-empty, version is based on target
86 */
87 test("", "", CURRENT.classFileVer());
88 for (Version source : Version.values()) {
89 test(source.release(), "", CURRENT.classFileVer()); // no target
90 for (Version target : Version.values()) {
91 if (target.compareTo(source) < 0)
92 continue; // Target < source not a valid set of arguments
93 else {
94 logMsg("Running for src = " + source + " target = "+ target +
95 " expected = " + target.classFileVer());
96 test(source.release(), target.release(), target.classFileVer());
97 }
98 }
99 }
100
101 if (errors > 0)
102 throw new Exception(errors + " errors found");
103 }
104
105 void test(String i, String j, int expected) {
106 File classFile = compileTestFile(i, j, javaFile);
107 short majorVer = getMajorVersion(classFile);
108 checkVersion(majorVer, expected);
109 }
110
111 void writeTestFile() throws IOException {
112 javaFile = new File("Test.java");
113 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
114 out.println("class Test { ");
115 out.println(" public void foo() { }");
116 out.println("}");
117 } catch (IOException ioe) {
118 error("IOException while creating Test.java" + ioe);
119 }
120 }
121
122 File compileTestFile(String i, String j, File f) {
123 int rc = -1;
124 // Src and target are empty
125 if (i.isEmpty() && j.isEmpty() ) {
126 rc = compile("-g", f.getPath());
127 } else if( j.isEmpty()) { // target is empty
128 rc = compile("-source", i, "-g", f.getPath());
129 } else {
130 rc = compile("-source", i, "-target", j, "-g", f.getPath());
131 }
132 if (rc != 0)
133 throw new Error("compilation failed. rc=" + rc);
134 String path = f.getPath();
135 return new File(path.substring(0, path.length() - 5) + ".class");
136 }
137
138 int compile(String... args) {
139 return com.sun.tools.javac.Main.compile(args);
140 }
141
142 void logMsg (String str) {
143 System.out.println(str);
144 }
145
146 short getMajorVersion(File f) {
147 List<String> args = new ArrayList<String>();
148 short majorVer = 0;
149 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
150 in.readInt();
151 in.readShort();
152 majorVer = in.readShort();
153 System.out.println("major version:" + majorVer);
154 } catch (IOException e) {
155 error("IOException while reading Test.class" + e);
156 }
157 return majorVer;
158 }
159
160 void checkVersion(short majorVer, int expected) {
161 if (majorVer != expected ) {
162 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
163 }
164 }
165
166 void error(String msg) {
167 System.out.println("error: " + msg);
168 errors++;
169 }
170 }