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/*
* 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();
}
}
}
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