/*
 * Copyright (c) 2010, 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.
 *
 */

package com.github.dcevm.test.methods;

import com.github.dcevm.test.category.Full;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
import static com.github.dcevm.test.util.HotSwapTestHelper.__version__;
import static org.junit.Assert.assertEquals;

/**
 * Test case that makes sure that old code does not get on-stack-replaced.
 *
 * @author Thomas Wuerthinger
 */
@Category(Full.class)
public class OldCodeNonOSRTest {

    // Chose high enough to make sure method could get OSR (usually the OSR flag in the VM is set to about 15000)
    private static final int N = 100000;

    @Before
    public void setUp() throws Exception {
        __toVersion__(0);
    }

    // Version 0
    public static class A {

        public int value() {
            return 5;
        }

        public int oldMethod() {
            __toVersion__(1);
            int sum = 0;
            for (int i=0; i<N; i++) {
                sum += i;
            }
            return (sum & deletedMethod()) | 1;
        }

        public int oldMethod2() {
            int sum = 0;
            for (int i=0; i<N; i++) {
                sum += i;
            }
            __toVersion__(1);
            return (sum & deletedMethod()) | 1;
        }

        public int oldMethod3() {
            int sum = 0;
            for (int i=0; i<N; i++) {
                sum += i;
            }
            __toVersion__(1);
            for (int i=0; i<N; i++) {
                sum += i;
            }
            return (sum & deletedMethod()) | 1;
        }

        public int deletedMethod() {
            return 1;
        }
    }

    // Version 1
    public static class A___1 {

        public int oldMethod() {
            return 2;
        }
    }

    @Test
    public void testOldCodeNonOSR() {

        assert __version__() == 0;
        A a = new A();

        assertEquals(1, a.oldMethod());
        assert __version__() == 1;
        assertEquals(2, a.oldMethod());

        __toVersion__(0);

        assertEquals(1, a.oldMethod2());
        assert __version__() == 1;
        assertEquals(2, a.oldMethod());

        __toVersion__(0);

        assertEquals(1, a.oldMethod3());
        assert __version__() == 1;
        assertEquals(2, a.oldMethod());

        __toVersion__(0);
    }
}
