/*

 * 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 6898851

 * @summary Compiling against this corrupt class file causes a stacktrace from javac

 */

import java.io.File;

import java.io.FileWriter;

import java.io.StringWriter;

import java.io.PrintWriter;

import java.io.IOException;

import com.sun.tools.classfile.ClassFile;

import com.sun.tools.classfile.ClassWriter;

import com.sun.tools.javac.Main;

public class BadClass {

    // Create and compile file containing body; return compiler output

    static String makeClass(String dir, String filename, String body) throws IOException {

        File file = new File(dir, filename);

        try (FileWriter fw = new FileWriter(file)) {

            fw.write(body);

        }

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        String args[] = { "-cp", dir, "-d", dir, "-XDrawDiagnostics", file.getPath() };

        Main.compile(args, pw);

        pw.close();

        return sw.toString();

    }

    public static void main(String... args) throws Exception {

        new File("d1").mkdir();

        new File("d2").mkdir();

        // Step 1. build an empty class with an interface

        makeClass("d1", "Empty.java", "abstract class Empty implements Readable {}");

        // Step 2. Modify classfile to have invalid constant pool index

        ClassFile cf = ClassFile.read(new File("d1","Empty.class"));

        cf.interfaces[0] = cf.constant_pool.size() + 10;

        ClassWriter cw = new ClassWriter();

        cw.write(cf, new File("d2","Empty.class"));

        // Step 3. Compile use of invalid class

        String result = makeClass("d2", "EmptyUse.java", "class EmptyUse { Empty e; }");

        if (!result.contains("compiler.misc.bad.class.file")) {

            System.out.println(result);

            throw new Exception("test failed");

        }

    }

}