| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8000316 |
| * @summary Huge performance bottleneck in com.sun.tools.javac.comp.Check.localClassName |
| * @modules jdk.compiler |
| * @run main T8000316 |
| */ |
| |
| import com.sun.source.util.JavacTask; |
| import java.net.URI; |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Locale; |
| import javax.tools.Diagnostic; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.SimpleJavaFileObject; |
| import javax.tools.StandardJavaFileManager; |
| import javax.tools.ToolProvider; |
| |
| public class T8000316 { |
| |
| final static int N_METHODS = 1024; |
| final static int N_CLASSES = 8; |
| |
| static class TestClass extends SimpleJavaFileObject { |
| |
| String methTemplate = " public static Runnable get#N() {\n" + |
| " return new Runnable() {\n" + |
| " @Override\n" + |
| " public void run() {\n" + |
| " return;\n" + |
| " }\n" + |
| " };\n" + |
| " }\n"; |
| |
| String classTemplate = "\n\nclass Chain#N {\n\n#M }"; |
| |
| String source; |
| |
| public TestClass() { |
| super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
| StringBuilder buf = new StringBuilder(); |
| StringBuilder fileBuf = new StringBuilder(); |
| |
| for (int i = 0 ; i < N_CLASSES ; i++) { |
| for (int j = 0; j < N_METHODS; j++) { |
| buf.append(methTemplate.replace("#N", String.valueOf(j))); |
| buf.append("\n"); |
| } |
| fileBuf.append(classTemplate.replace("#M", buf.toString()).replace("#N", String.valueOf(i))); |
| buf = new StringBuilder(); |
| source = fileBuf.toString(); |
| } |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return source; |
| } |
| } |
| |
| public static void main(String... args) throws Exception { |
| ArrayList<JavaFileObject> sources = new ArrayList<>(); |
| sources.add(new TestClass()); |
| new T8000316().run(sources); |
| } |
| |
| void run(List<JavaFileObject> sources) throws Exception { |
| javax.tools.DiagnosticListener<JavaFileObject> dc = (diagnostic) -> { |
| if (diagnostic.getKind() == Diagnostic.Kind.ERROR) { |
| throw new AssertionError("unexpected diagnostic: " + diagnostic.getMessage(Locale.getDefault())); |
| } |
| }; |
| JavaCompiler comp = ToolProvider.getSystemJavaCompiler(); |
| try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) { |
| JavacTask ct = (JavacTask)comp.getTask(null, fm, dc, |
| null, null, sources); |
| ct.analyze(); |
| } |
| } |
| } |