/*

 * Copyright (c) 2014, 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 8064703

 * @summary Deoptimization between array allocation and arraycopy may result in non initialized array

 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:TypeProfileLevel=020 TestArrayCopyNoInit

 *

 */

public class TestArrayCopyNoInit {

    static int[] m1(int[] src) {

        int[] dest = new int[10];

        try {

            System.arraycopy(src, 0, dest, 0, 10);

        } catch (NullPointerException npe) {

        }

        return dest;

    }

    static int[] m2(Object src, boolean flag) {

        Class tmp = src.getClass();

        if (flag) {

            return null;

        }

        int[] dest = new int[10];

        try {

            System.arraycopy(src, 0, dest, 0, 10);

        } catch (ArrayStoreException npe) {

        }

        return dest;

    }

    static int[] m3(int[] src, int src_offset) {

        int tmp = src[0];

        int[] dest = new int[10];

        try {

            System.arraycopy(src, src_offset, dest, 0, 10);

        } catch (IndexOutOfBoundsException npe) {

        }

        return dest;

    }

    static int[] m4(int[] src, int length) {

        int tmp = src[0];

        int[] dest = new int[10];

        try {

            System.arraycopy(src, 0, dest, 0, length);

        } catch (IndexOutOfBoundsException npe) {

        }

        return dest;

    }

    static TestArrayCopyNoInit[] m5(Object[] src) {

        Object tmp = src[0];

        TestArrayCopyNoInit[] dest = new TestArrayCopyNoInit[10];

        System.arraycopy(src, 0, dest, 0, 10);

        return dest;

    }

    static class A {

    }

    static class B extends A {

    }

    static class C extends B {

    }

    static class D extends C {

    }

    static class E extends D {

    }

    static class F extends E {

    }

    static class G extends F {

    }

    static class H extends G {

    }

    static class I extends H {

    }

    static H[] m6(Object[] src) {

        Object tmp = src[0];

        H[] dest = new H[10];

        System.arraycopy(src, 0, dest, 0, 10);

        return dest;

    }

    static Object m7_src(Object src) {

        return src;

    }

    static int[] m7(Object src, boolean flag) {

        Class tmp = src.getClass();

        if (flag) {

            return null;

        }

        src = m7_src(src);

        int[] dest = new int[10];

        try {

            System.arraycopy(src, 0, dest, 0, 10);

        } catch (ArrayStoreException npe) {

        }

        return dest;

    }

    static public void main(String[] args) {

        boolean success = true;

        int[] src = new int[10];

        TestArrayCopyNoInit[] src2 = new TestArrayCopyNoInit[10];

        int[] res = null;

        TestArrayCopyNoInit[] res2 = null;

        Object src_obj = new Object();

        for (int i = 0; i < 20000; i++) {

            m1(src);

        }

        res = m1(null);

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

            if (res[i] != 0) {

                success = false;

                System.out.println("Uninitialized array following NPE");

                break;

            }

        }

        for (int i = 0; i < 20000; i++) {

            if ((i%2) == 0) {

                m2(src, false);

            } else {

                m2(src_obj, true);

            }

        }

        res = m2(src_obj, false);

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

            if (res[i] != 0) {

                success = false;

                System.out.println("Uninitialized array following failed array check");

                break;

            }

        }

        for (int i = 0; i < 20000; i++) {

            m3(src, 0);

        }

        res = m3(src, -1);

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

            if (res[i] != 0) {

                success = false;

                System.out.println("Uninitialized array following failed src offset check");

                break;

            }

        }

        for (int i = 0; i < 20000; i++) {

            m4(src, 0);

        }

        res = m4(src, -1);

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

            if (res[i] != 0) {

                success = false;

                System.out.println("Uninitialized array following failed length check");

                break;

            }

        }

        for (int i = 0; i < 20000; i++) {

            m5(src2);

        }

        res2 = m5(new Object[10]);

        for (int i = 0; i < res2.length; i++) {

            if (res2[i] != null) {

                success = false;

                System.out.println("Uninitialized array following failed type check");

                break;

            }

        }

        H[] src3 = new H[10];

        I b = new I();

        for (int i = 0; i < 20000; i++) {

            m6(src3);

        }

        H[] res3 = m6(new Object[10]);

        for (int i = 0; i < res3.length; i++) {

            if (res3[i] != null) {

                success = false;

                System.out.println("Uninitialized array following failed full type check");

                break;

            }

        }

        for (int i = 0; i < 20000; i++) {

            if ((i%2) == 0) {

                m7(src, false);

            } else {

                m7(src_obj, true);

            }

        }

        res = m7(src_obj, false);

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

            if (res[i] != 0) {

                success = false;

                System.out.println("Uninitialized array following failed type check with return value profiling");

                break;

            }

        }

        if (!success) {

            throw new RuntimeException("Some tests failed");

        }

    }

}