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 * 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

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 */

package nsk.jvmti.RedefineClasses;

import java.io.*;

/**

 * This test checks that the JVMTI function <code>RedefineClasses()</code>

 * properly returns the error <code>JVMTI_ERROR_NULL_POINTER</code>:<br>

 * <i>Invalid pointer: classDefs or one of class_bytes is NULL</i><br>

 * The test creates a dummy instance of tested class <i>redefclass006r</i>.

 * Then the test tries twice to redefine the class <i>redefclass006r</i> by

 * sequencely invoking the function <code>RedefineClasses()</code> with:

 * <li>NULL pointer to the field <code>class_bytes</code> of the

 * structure <code>JVMTI_class_definition</code>

 * <li>NULL pointer to the structure <code>JVMTI_class_definition</code>

 * by itself.

 */

public class redefclass006 {

    static final int PASSED = 0;

    static final int FAILED = 2;

    static final int JCK_STATUS_BASE = 95;

    static boolean DEBUG_MODE = false;

    private PrintStream out;

    static {

        try {

            System.loadLibrary("redefclass006");

        } catch (UnsatisfiedLinkError e) {

            System.err.println("Could not load redefclass006 library");

            System.err.println("java.library.path:" +

                System.getProperty("java.library.path"));

            throw e;

        }

    }

    native static int makeRedefinition(int vrb, Class redefClass,

        byte[] classBytes);

    public static void main(String[] argv) {

        argv = nsk.share.jvmti.JVMTITest.commonInit(argv);

        System.exit(run(argv, System.out) + JCK_STATUS_BASE);

    }

    public static int run(String argv[], PrintStream out) {

        return new redefclass006().runIt(argv, out);

    }

    private int runIt(String argv[], PrintStream out) {

        File newRedefClassFile = null;

        byte[] redefClassBytes;

        int totRes = PASSED;

        int retValue = PASSED;

        this.out = out;

        for (int i = 0; i < argv.length; i++) {

            String token = argv[i];

            if (token.equals("-v")) // verbose mode

                DEBUG_MODE = true;

        }

        redefclass006r redefClsObj = new redefclass006r();

        if (redefClsObj.checkIt(out, DEBUG_MODE) == 19) {

            if (DEBUG_MODE)

                out.println("Successfully check the class redefclass006r");

        } else {

            out.println("TEST: failed to check the class redefclass006r");

            return FAILED;

        }

// try to redefine class redefclass006r

        String fileName =

            redefclass006r.class.getName().replace('.', File.separatorChar) +

            ".class";

        if (DEBUG_MODE)

            out.println("Trying to redefine class from the file: " + fileName);

        try {

            ClassLoader cl = redefclass006.class.getClassLoader();

            InputStream in = cl.getSystemResourceAsStream(fileName);

            if (in == null) {

                out.println("# Class file \"" + fileName + "\" not found");

                return FAILED;

            }

            redefClassBytes = new byte[in.available()];

            in.read(redefClassBytes);

            in.close();

        } catch (Exception ex) {

            out.println("# Unexpected exception while reading class file:");

            out.println("# " + ex);

            return FAILED;

        }

/* check that if RedefineClasses() is invoked with NULL pointer to

   the field JVMTI_class_definition.class_bytes, it will return

   the error JVMTI_ERROR_NULL_POINTER */

        if (DEBUG_MODE)

            totRes = retValue = makeRedefinition(3,

                redefClsObj.getClass(), redefClassBytes);

        else

            totRes = retValue = makeRedefinition(2,

                redefClsObj.getClass(), redefClassBytes);

        if (DEBUG_MODE && retValue == PASSED)

            out.println("Check #1 PASSED:\n" +

                "\tRedefineClasses() being invoked with NULL pointer " +

                "to the JVMTI_class_definition.class_bytes,\n" +

                "\treturned the appropriate error JVMTI_ERROR_NULL_POINTER");

/* check that RedefineClasses() is invoked with NULL pointer to

   the JVMTI structure JVMTI_class_definition, it will return

   the error JVMTI_ERROR_NULL_POINTER */

        if (DEBUG_MODE)

            retValue = makeRedefinition(1,

                redefClsObj.getClass(), redefClassBytes);

        else

            retValue = makeRedefinition(0,

                redefClsObj.getClass(), redefClassBytes);

        if (retValue == FAILED)

            totRes = FAILED;

        else {

            if (DEBUG_MODE)

                out.println("\nCheck #2 PASSED:\n" +

                    "\tRedefineClasses() being invoked with NULL pointer " +

                    "to the JVMTI structure JVMTI_class_definition,\n" +

                    "\treturned the appropriate error JVMTI_ERROR_NULL_POINTER");

        }

        return totRes;

    }

}