Wed, 23 Oct 2013 23:02:17 +0200
8027191: Fix for JDK-8026861 refers to an incorrect bug number
Summary: Reverting changeset b05db8c815e8, so that it can be applied again with a correct bug number
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2010, 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 */
24 /*
25 * @test
26 * @bug 6999210
27 * @summary javac should be able to warn of anomalous conditions in classfiles
28 */
30 import java.io.*;
31 import java.util.*;
33 public class T6999210 {
34 public static void main(String... args) throws Exception {
35 new T6999210().run();
36 }
38 void run() throws Exception {
39 File srcDir = new File("src");
40 File classesDir = new File("classes");
41 classesDir.mkdirs();
43 File c_java = writeFile(srcDir, "C.java", "class C<T> { }");
44 compile("-d", classesDir.getPath(), c_java.getPath());
45 File c_class = new File(classesDir, "C.class");
46 setMajorVersion(c_class, 48);
47 File d_java = writeFile(srcDir, "D.java", "class D { C c; }");
49 // verify no warning if -Xlint:classfile not enabled
50 String out1 = compile(
51 "-d", classesDir.getPath(),
52 "-classpath", classesDir.getPath(),
53 d_java.getPath());
54 if (out1.length() > 0)
55 error("unexpected output from javac");
57 // sanity check of warning when -XDrawDiagnostics not used
58 String out2 = compile(
59 "-d", classesDir.getPath(),
60 "-classpath", classesDir.getPath(),
61 "-Xlint:classfile",
62 d_java.getPath());
63 if (!out2.contains("[classfile]"))
64 error("expected output \"[classfile]\" not found");
66 // check specific details, using -XDrawDiagnostics
67 String out3 = compile(
68 "-d", classesDir.getPath(),
69 "-classpath", classesDir.getPath(),
70 "-Xlint:classfile", "-XDrawDiagnostics",
71 d_java.getPath());
72 String expect = "C.class:-:-: compiler.warn.future.attr: Signature, 49, 0, 48, 0";
73 if (!out3.contains(expect))
74 error("expected output \"" + expect + "\" not found");
76 if (errors > 0)
77 throw new Exception(errors + " errors occurred");
78 }
80 String compile(String... args) throws Exception {
81 System.err.println("compile: " + Arrays.asList(args));
82 StringWriter sw = new StringWriter();
83 PrintWriter pw = new PrintWriter(sw);
84 int rc = com.sun.tools.javac.Main.compile(args, pw);
85 pw.close();
86 String out = sw.toString();
87 if (out.length() > 0)
88 System.err.println(out);
89 if (rc != 0)
90 throw new Exception("compilation failed, rc=" + rc);
91 return out;
92 }
94 void setMajorVersion(File f, int major) throws IOException {
95 int len = (int) f.length();
96 byte[] data = new byte[len];
97 try (DataInputStream in = new DataInputStream(new FileInputStream(f))) {
98 in.readFully(data);
99 }
100 // u4 magic
101 // u2 minor
102 data[6] = (byte) (major >> 8);
103 data[7] = (byte) (major & 0xff);
104 try (FileOutputStream out = new FileOutputStream(f)) {
105 out.write(data);
106 }
107 }
109 File writeFile(File dir, String path, String body) throws IOException {
110 File f = new File(dir, path);
111 f.getParentFile().mkdirs();
112 try (FileWriter out = new FileWriter(f)) {
113 out.write(body);
114 }
115 return f;
116 }
118 void error(String msg) {
119 System.err.println("Error: " + msg);
120 errors++;
121 }
123 int errors;
124 }