Fri, 24 Apr 2020 03:58:51 +0100
Merge
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 6863465
27 * @summary javac doesn't detect circular subclass dependencies via qualified names
28 * @run main TestCircularClassfile
29 */
31 import java.io.*;
32 import java.net.URI;
33 import java.util.Arrays;
34 import javax.tools.Diagnostic;
35 import javax.tools.DiagnosticListener;
36 import javax.tools.JavaCompiler;
37 import javax.tools.JavaFileObject;
38 import javax.tools.SimpleJavaFileObject;
39 import javax.tools.ToolProvider;
41 import com.sun.source.util.JavacTask;
42 import java.util.EnumSet;
44 public class TestCircularClassfile {
46 enum ClassName {
47 A("A"),
48 B("B"),
49 C("C"),
50 OBJECT("Object");
52 String name;
54 ClassName(String name) {
55 this.name = name;
56 }
57 }
59 static class JavaSource extends SimpleJavaFileObject {
61 final static String sourceStub = "class #C extends #S {}";
63 String source;
65 public JavaSource(ClassName clazz, ClassName sup) {
66 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
67 source = sourceStub.replace("#C", clazz.name).replace("#S", sup.name);
68 }
70 @Override
71 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
72 return source;
73 }
74 }
76 public static void main(String... args) throws Exception {
77 int count = 0;
78 for (ClassName clazz : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
79 for (ClassName sup : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
80 if (sup.ordinal() < clazz.ordinal()) continue;
81 check("sub_"+count++, clazz, sup);
82 }
83 }
84 }
86 static JavaSource[] initialSources = new JavaSource[] {
87 new JavaSource(ClassName.A, ClassName.OBJECT),
88 new JavaSource(ClassName.B, ClassName.A),
89 new JavaSource(ClassName.C, ClassName.B)
90 };
92 static String workDir = System.getProperty("user.dir");
94 static void check(String destPath, ClassName clazz, ClassName sup) throws Exception {
95 File destDir = new File(workDir, destPath); destDir.mkdir();
96 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
97 JavacTask ct = (JavacTask)tool.getTask(null, null, null,
98 Arrays.asList("-d", destPath), null, Arrays.asList(initialSources));
99 ct.generate();
100 File fileToRemove = new File(destPath, clazz.name + ".class");
101 fileToRemove.delete();
102 JavaSource newSource = new JavaSource(clazz, sup);
103 DiagnosticChecker checker = new DiagnosticChecker();
104 ct = (JavacTask)tool.getTask(null, null, checker,
105 Arrays.asList("-cp", destPath), null, Arrays.asList(newSource));
106 ct.analyze();
107 if (!checker.errorFound) {
108 throw new AssertionError(newSource.source);
109 }
110 }
112 static class DiagnosticChecker implements DiagnosticListener<JavaFileObject> {
114 boolean errorFound = false;
116 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
117 if (diagnostic.getKind() == Diagnostic.Kind.ERROR &&
118 diagnostic.getCode().equals("compiler.err.cyclic.inheritance")) {
119 errorFound = true;
120 }
121 }
122 }
123 }