/*

 * Copyright (c) 2014, 2015, 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

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 */

import java.lang.reflect.Method;

import java.util.EnumSet;

import sun.hotspot.WhiteBox;

import sun.hotspot.code.BlobType;

import jdk.test.lib.Asserts;

import jdk.test.lib.InfiniteLoop;

import compiler.whitebox.CompilerWhiteBoxTest;

/*

 * @test

 * @bug 8059624 8064669

 * @modules java.management

 * @build ForceNMethodSweepTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:-TieredCompilation -XX:+WhiteBoxAPI

 *                   -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCase$Helper::*

 *                   -XX:-BackgroundCompilation ForceNMethodSweepTest

 * @summary testing of WB::forceNMethodSweep

 */

public class ForceNMethodSweepTest extends CompilerWhiteBoxTest {

    public static void main(String[] args) throws Exception {

        CompilerWhiteBoxTest.main(ForceNMethodSweepTest::new, args);

    }

    private final EnumSet<BlobType> blobTypes;

    private ForceNMethodSweepTest(TestCase testCase) {

        super(testCase);

        // to prevent inlining of #method

        WHITE_BOX.testSetDontInlineMethod(method, true);

        blobTypes = BlobType.getAvailable();

    }

    @Override

    protected void test() throws Exception {

        checkNotCompiled();

        guaranteedSweep();

        int usage = getTotalUsage();

        compile();

        checkCompiled();

        int afterCompilation = getTotalUsage();

        Asserts.assertGT(afterCompilation, usage,

                "compilation should increase usage");

        guaranteedSweep();

        int afterSweep = getTotalUsage();

        Asserts.assertLTE(afterSweep, afterCompilation,

                "sweep shouldn't increase usage");

        deoptimize();

        guaranteedSweep();

        int afterDeoptAndSweep = getTotalUsage();

        Asserts.assertLT(afterDeoptAndSweep, afterSweep,

                "sweep after deoptimization should decrease usage");

     }

    private int getTotalUsage() {

        int usage = 0;

        for (BlobType type : blobTypes) {

           usage += type.getMemoryPool().getUsage().getUsed();

        }

        return usage;

    }

    private void guaranteedSweep() {

        // not entrant -> ++stack_traversal_mark -> zombie -> reclamation -> flushed

        for (int i = 0; i < 5; ++i) {

            WHITE_BOX.fullGC();

            WHITE_BOX.forceNMethodSweep();

        }

    }

}