jdk

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/*
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 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package gc.CondCardMark;
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/**
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 * @test
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 * @bug 8076987
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 * @bug 8078438
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 * @summary Verify UseCondCardMark works
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 * @modules java.base/jdk.internal.misc
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 * @run main/othervm -Xint gc.CondCardMark.Basic
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 * @run main/othervm -Xint -XX:+UseCondCardMark gc.CondCardMark.Basic
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 * @run main/othervm -XX:TieredStopAtLevel=1 gc.CondCardMark.Basic
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 * @run main/othervm -XX:TieredStopAtLevel=1 -XX:+UseCondCardMark gc.CondCardMark.Basic
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 * @run main/othervm -XX:TieredStopAtLevel=4 gc.CondCardMark.Basic
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 * @run main/othervm -XX:TieredStopAtLevel=4 -XX:+UseCondCardMark gc.CondCardMark.Basic
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 * @run main/othervm -XX:-TieredCompilation gc.CondCardMark.Basic
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 * @run main/othervm -XX:-TieredCompilation -XX:+UseCondCardMark gc.CondCardMark.Basic
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*/
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public class Basic {
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    static volatile MyObject sink;
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    public static void main(String args[]) {
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        final int COUNT = 10000000;
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        for (int c = 0; c < COUNT; c++) {
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             MyObject o = new MyObject();
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             o.x = c;
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             doStore(o);
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        }
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        if (sink.x != COUNT-1) {
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             throw new IllegalStateException("Failed");
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        }
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    }
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    public static void doStore(MyObject o) {
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        sink = o;
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    }
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    static class MyObject {
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        int x;
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    }
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}
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