1 /*
2  * Copyright (c) 2012, 2015, 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 7142086
27  * @summary performance problem in Check.checkOverrideClashes(...)
28  * @modules jdk.compiler
29  * @run main/timeout=10 T7142086
30  */
31 
32 import com.sun.source.util.JavacTask;
33 import java.net.URI;
34 import java.util.List;
35 import java.util.ArrayList;
36 import java.util.Locale;
37 import javax.tools.Diagnostic;
38 import javax.tools.JavaCompiler;
39 import javax.tools.JavaFileObject;
40 import javax.tools.SimpleJavaFileObject;
41 import javax.tools.StandardJavaFileManager;
42 import javax.tools.ToolProvider;
43 
44 public class T7142086 {
45 
46     final static int N_METHODS = 1000;
47 
48     static class TestClass extends SimpleJavaFileObject {
49 
50         String methTemplate = "abstract void m(A#N p);";
51         String classTemplate = "abstract class Test { #M }";
52 
53         String source;
54 
TestClass()55         public TestClass() {
56             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
57             StringBuilder buf = new StringBuilder();
58             for (int i = 0 ; i < N_METHODS ; i++) {
59                 buf.append(methTemplate.replace("#N", String.valueOf(i)));
60                 buf.append("\n");
61             }
62             source = classTemplate.replace("#M", buf.toString());
63         }
64 
65         @Override
getCharContent(boolean ignoreEncodingErrors)66         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
67             return source;
68         }
69     }
70 
71     static class AnSource extends SimpleJavaFileObject {
72 
73         String classTemplate = "abstract class A#N { }";
74 
75         String source;
76 
AnSource(int n)77         public AnSource(int n) {
78             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
79             source = classTemplate.replace("#N", String.valueOf(n));
80         }
81 
82         @Override
getCharContent(boolean ignoreEncodingErrors)83         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
84             return source;
85         }
86     }
87 
main(String... args)88     public static void main(String... args) throws Exception {
89         ArrayList<JavaFileObject> sources = new ArrayList<>();
90         for (int i = 0 ; i < N_METHODS ; i++) {
91             sources.add(new AnSource(i));
92         }
93         sources.add(new TestClass());
94         new T7142086().run(sources);
95     }
96 
run(List<JavaFileObject> sources)97     void run(List<JavaFileObject> sources) throws Exception {
98         DiagnosticChecker dc = new DiagnosticChecker();
99         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
100         try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {
101             JavacTask ct = (JavacTask)comp.getTask(null, fm, dc,
102                     null, null, sources);
103             ct.analyze();
104         }
105     }
106 
107     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
108 
109         boolean errorFound;
110 
report(Diagnostic<? extends JavaFileObject> diagnostic)111         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
112             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
113                 throw new AssertionError("unexpected diagnostic: " + diagnostic.getMessage(Locale.getDefault()));
114             }
115         }
116     }
117 }
118