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
40 int errors;
41 String[] jdk = {"", "1.6", "1.7", "1.8", "1.9", "1.10", "11", "12"};
42 File javaFile = null;
43
44 public static void main(String[] args) throws Throwable {
45 new ClassVersionChecker().run();
46 }
47
48 void run() throws Exception {
49 writeTestFile();
50 /* Rules applicable for -source and -target combinations
51 * 1. If both empty, version num is for the current release
52 * 2. If source is not empty and target is empty, version is based on source
53 * 3. If both non-empty, version is based on target
54 */
55
56 /* -source (0=>empty,1=>1.2,...) X -target (0=>empty,1=>1.2,...)
57 * ver[0][0] => no -source or -target was given
58 * -1 => invalid combinations
59 */
60 int[][] ver =
61 {{56, -1, -1, -1, -1, -1, -1, -1},
62 {56, 50, 51, 52, 53, 54, 55, 56},
63 {56, -1, 51, 52, 53, 54, 55, 56},
64 {56, -1, -1, 52, 53, 54, 55, 56},
65 {56, -1, -1, -1, 53, 54, 55, 56},
66 {56, -1, -1, -1, -1, 54, 55, 56}};
67
68 // Loop to run all possible combinations of source/target values
69 for (int i = 0; i< ver.length; i++) {
70 for (int j = 0 ; j< ver[i].length; j++) {
71 if(ver[i][j] != -1) {
72 logMsg("Index values for i = " + i + " j = " + j);
73 logMsg("Running for src = " + jdk[i] + " target = "+jdk[j] +" expected = " + ver[i][j]);
74 test(i,j, ver[i][j]);
75 }
76 }
77 }
78
79 if (errors > 0)
80 throw new Exception(errors + " errors found");
81 }
82
83 void test (int i, int j, int expected) {
84 File classFile = compileTestFile(i, j, javaFile);
85 short majorVer = getMajorVersion(classFile);
86 checkVersion(majorVer, expected);
87 }
88
89 void writeTestFile() throws IOException {
90 javaFile = new File("Test.java");
91 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
92 out.println("class Test { ");
93 out.println(" public void foo() { }");
94 out.println("}");
95 } catch (IOException ioe) {
96 error("IOException while creating Test.java" + ioe);
97 }
98 }
99
100 File compileTestFile(int i , int j, File f) {
101 int rc = -1;
102 // Src and target are empty
103 if (i == 0 && j == 0 ) {
104 rc = compile("-g", f.getPath());
105 } else if( j == 0 ) { // target is empty
106 rc = compile("-source", jdk[i], "-g", f.getPath());
107 } else {
108 rc = compile("-source", jdk[i], "-target", jdk[j], "-g", f.getPath());
109 }
110 if (rc != 0)
111 throw new Error("compilation failed. rc=" + rc);
112 String path = f.getPath();
113 return new File(path.substring(0, path.length() - 5) + ".class");
114 }
115
116 int compile(String... args) {
117 return com.sun.tools.javac.Main.compile(args);
118 }
119
120 void logMsg (String str) {
121 System.out.println(str);
122 }
123
124 short getMajorVersion(File f) {
125 List<String> args = new ArrayList<String>();
126 short majorVer = 0;
127 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
128 in.readInt();
129 in.readShort();
130 majorVer = in.readShort();
131 System.out.println("major version:" + majorVer);
132 } catch (IOException e) {
133 error("IOException while reading Test.class" + e);
134 }
135 return majorVer;
136 }
137
138 void checkVersion(short majorVer, int expected) {
139 if (majorVer != expected ) {
140 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
141 }
142 }
143
144 void error(String msg) {
145 System.out.println("error: " + msg);
146 errors++;
147 }
148 }