test/hotspot/jtreg/vmTestbase/vm/mlvm/indy/stress/java/relinkMutableCallSiteFreq/Test.java

/*
 * Copyright (c) 2011, 2018, 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.
 *
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 * questions.
 */


/*
 * @test
 *
 * @summary converted from VM Testbase vm/mlvm/indy/stress/java/relinkMutableCallSiteFreq.
 * VM Testbase keywords: [feature_mlvm, nonconcurrent]
 *
 * @library /vmTestbase
 *          /test/lib
 * @run driver jdk.test.lib.FileInstaller . .
 *
 * @comment build test class and indify classes
 * @build vm.mlvm.indy.stress.java.relinkMutableCallSiteFreq.Test
 * @run driver vm.mlvm.share.IndifiedClassesBuilder
 *
 * @run main/othervm vm.mlvm.indy.stress.java.relinkMutableCallSiteFreq.Test
 */

package vm.mlvm.indy.stress.java.relinkMutableCallSiteFreq;

import java.lang.invoke.CallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MutableCallSite;

import vm.mlvm.indy.share.INDIFY_RelinkCallSiteFreqTest;
import vm.mlvm.share.MlvmTest;

/**
 * The test creates a mutable call site and relinks it from one thread while calling the current
 * target from the other one. Currently there are 6 targets.

 * The test verifies that target changes in the call site are eventually seen by target calling
 * thread by measuring a frequency of calls for each target and comparing it with theoretical frequency.
 *
 */
public class Test extends INDIFY_RelinkCallSiteFreqTest {

    @Override
    protected CallSite createCallSite(MethodHandle mh) {
        return new MutableCallSite(mh);
    }

    /**
     * Runs the test.
     * @param args Arguments to the test.
     */
    public static void main(String[] args) {
        MlvmTest.launch(args);
    }
}