/*

 * Copyright (c) 2014, 2016, 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 8033930 8033913

 * @summary bad formatting of StackMapTable entries

 * @modules jdk.jdeps/com.sun.tools.javap

 */

import java.io.*;

import java.util.*;

public class StackMapTableTest {

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

        new StackMapTableTest().run();

    }

    void run() throws Exception {

        String testClasses = System.getProperty("test.classes");

        String out = javap("-v", "-classpath", testClasses, A.class.getName());

        String nl = System.getProperty("line.separator");

        out = out.replaceAll(nl, "\n");

        if (out.contains("\n\n\n"))

            error("double blank line found");

        String expect =

            "      StackMapTable: number_of_entries = 2\n" +

            "        frame_type = 252 /* append */\n" +

            "          offset_delta = 2\n" +

            "          locals = [ int ]\n" +

            "        frame_type = 250 /* chop */\n" +

            "          offset_delta = 18\n";

        if (!out.contains(expect))

            error("expected text not found");

        if (errors > 0)

            throw new Exception(errors + " errors found");

    }

    String javap(String... args) throws Exception {

        StringWriter sw = new StringWriter();

        PrintWriter out = new PrintWriter(sw);

        int rc = com.sun.tools.javap.Main.run(args, out);

        out.close();

        System.out.println(sw.toString());

        if (rc < 0)

            throw new Exception("javap exited, rc=" + rc);

        return sw.toString();

    }

    void error(String msg) {

        System.out.println("Error: " + msg);

        errors++;

    }

    int errors;

    /** Simple test class to run through javap. */

    public class A {

        public void a() {

            for (int i = 0; i < 10; i++) {

                System.out.println(i);

            }

        }

        public void b() {

        }

        public void c() {

        }

    }

}