Thu, 30 Jul 2009 10:29:53 +0100
6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg
1 /*
2 * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
24 /*
25 * @test
26 * @bug 6439826 6411930 6380018 6392177
27 * @summary Exception issuing Diagnostic while processing generated errant code
28 */
30 import java.io.*;
31 import java.util.*;
32 import javax.annotation.processing.*;
33 import javax.lang.model.*;
34 import javax.lang.model.element.*;
35 import javax.tools.*;
36 import com.sun.source.util.*;
37 import com.sun.tools.javac.api.*;
38 import static javax.lang.model.util.ElementFilter.*;
41 @SupportedAnnotationTypes("*")
42 @SupportedSourceVersion(SourceVersion.RELEASE_7 )
43 public class T6439826 extends AbstractProcessor {
44 public static void main(String... args) {
45 String testSrc = System.getProperty("test.src", ".");
46 String testClasses = System.getProperty("test.classes");
47 JavacTool tool = JavacTool.create();
48 MyDiagListener dl = new MyDiagListener();
49 StandardJavaFileManager fm = tool.getStandardFileManager(dl, null, null);
50 Iterable<? extends JavaFileObject> files =
51 fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, T6439826.class.getName()+".java")));
52 Iterable<String> opts = Arrays.asList("-source","1.6",
53 "-proc:only",
54 "-processor", "T6439826",
55 "-processorpath", testClasses);
56 StringWriter out = new StringWriter();
57 JavacTask task = tool.getTask(out, fm, dl, opts, null, files);
58 task.call();
59 String s = out.toString();
60 System.err.print(s);
61 // Expect the following 2 diagnostics, and no output to log
62 // Foo.java:1: illegal character: \35
63 // Foo.java:1: reached end of file while parsing
64 System.err.println(dl.count + " diagnostics; " + s.length() + " characters");
65 if (dl.count != 2 || s.length() != 0)
66 throw new AssertionError("unexpected output from compiler");
67 }
69 public boolean process(Set<? extends TypeElement> annotations,
70 RoundEnvironment roundEnv) {
71 Set<? extends TypeElement> elems = typesIn(roundEnv.getRootElements());
72 for (TypeElement e: elems) {
73 if (e.getSimpleName().toString().equals(T6439826.class.getName()))
74 writeBadFile();
75 }
76 return false;
77 }
79 private void writeBadFile() {
80 Filer filer = processingEnv.getFiler();
81 Messager messager = processingEnv.getMessager();
82 try {
83 Writer out = filer.createSourceFile("Foo").openWriter();
84 out.write("class Foo #"); // write a file that generates a scanner error
85 out.close();
86 } catch (IOException e) {
87 messager.printMessage(Diagnostic.Kind.ERROR, e.toString());
88 }
89 }
91 static class MyDiagListener implements DiagnosticListener {
92 public void report(Diagnostic d) {
93 System.err.println(d);
94 count++;
95 }
97 public int count;
98 }
99 }