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 public class ClassVersionChecker {
39 private static enum Version {
40 SIX("6", 50),
41 SEVEN("7", 51),
42 EIGHT("8", 52),
43 NINE("9", 53),
44 TEN("10", 54),
45 ELEVEN("11", 55),
46 TWELVE("12", 56);
47
48 private Version(String release, int classFileVer) {
49 this.release = release;
50 this.classFileVer = classFileVer;
51 }
52 private final String release;
53 private final int classFileVer;
54
55 String release() {return release;}
56 int classFileVer() {return classFileVer;}
57 }
58
59 static final Version CURRENT;
60 static {
61 Version[] versions = Version.values();
62 int index = versions.length;
63 CURRENT = versions[index - 1];
64 }
65
66 int errors;
67
68 File javaFile = null;
69
70 public static void main(String[] args) throws Throwable {
71 new ClassVersionChecker().run();
72 }
73
74 void run() throws Exception {
75 writeTestFile();
76 /*
77 * Rules applicable for -source and -target combinations:
78 * 1. If both empty, version num is for the current release
79 * 2. If source is not empty and target is empty, version is based on the current release
80 * 3. If both non-empty, version is based on target
81 */
82 test("", "", CURRENT.classFileVer());
83 for (Version source : Version.values()) {
84 test(source.release(), "", CURRENT.classFileVer()); // no target
85 for (Version target : Version.values()) {
86 if (target.compareTo(source) < 0)
87 continue; // Target < source not a valid set of arguments
88 else {
89 logMsg("Running for src = " + source + " target = "+ target +
90 " expected = " + target.classFileVer());
91 test(source.release(), target.release(), target.classFileVer());
92 }
93 }
94 }
95
96 if (errors > 0)
97 throw new Exception(errors + " errors found");
98 }
99
100 void test (String i, String j, int expected) {
101 File classFile = compileTestFile(i, j, javaFile);
102 short majorVer = getMajorVersion(classFile);
103 checkVersion(majorVer, expected);
104 }
105
106 void writeTestFile() throws IOException {
107 javaFile = new File("Test.java");
108 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
109 out.println("class Test { ");
110 out.println(" public void foo() { }");
111 out.println("}");
112 } catch (IOException ioe) {
113 error("IOException while creating Test.java" + ioe);
114 }
115 }
116
117 File compileTestFile(String i , String j, File f) {
118 int rc = -1;
119 // Src and target are empty
120 if (i.isEmpty() && j.isEmpty() ) {
121 rc = compile("-g", f.getPath());
122 } else if( j.isEmpty()) { // target is empty
123 rc = compile("-source", i, "-g", f.getPath());
124 } else {
125 rc = compile("-source", i, "-target", j, "-g", f.getPath());
126 }
127 if (rc != 0)
128 throw new Error("compilation failed. rc=" + rc);
129 String path = f.getPath();
130 return new File(path.substring(0, path.length() - 5) + ".class");
131 }
132
133 int compile(String... args) {
134 return com.sun.tools.javac.Main.compile(args);
135 }
136
137 void logMsg (String str) {
138 System.out.println(str);
139 }
140
141 short getMajorVersion(File f) {
142 List<String> args = new ArrayList<String>();
143 short majorVer = 0;
144 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
145 in.readInt();
146 in.readShort();
147 majorVer = in.readShort();
148 System.out.println("major version:" + majorVer);
149 } catch (IOException e) {
150 error("IOException while reading Test.class" + e);
151 }
152 return majorVer;
153 }
154
155 void checkVersion(short majorVer, int expected) {
156 if (majorVer != expected ) {
157 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
158 }
159 }
160
161 void error(String msg) {
162 System.out.println("error: " + msg);
163 errors++;
164 }
165 }