/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import jdk.test.lib.Asserts;

import java.lang.management.MemoryPoolMXBean;

import sun.hotspot.code.BlobType;

/*

 * @test UsageThresholdIncreasedTest

 * @library /testlibrary /../../test/lib

 * @modules java.base/sun.misc

 *          java.management

 * @build UsageThresholdIncreasedTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *     sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *     -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache -XX:-UseCodeCacheFlushing

 *     -XX:-MethodFlushing -XX:CompileCommand=compileonly,null::*

 *     UsageThresholdIncreasedTest

 * @summary verifying that threshold hasn't been hit after allocation smaller

 *     than threshold value and that threshold value can be changed

 */

public class UsageThresholdIncreasedTest {

    private static final int ALLOCATION_STEP = 5;

    private static final long THRESHOLD_STEP = ALLOCATION_STEP

            * CodeCacheUtils.MIN_ALLOCATION;

    private final BlobType btype;

    public UsageThresholdIncreasedTest(BlobType btype) {

        this.btype = btype;

    }

    public static void main(String[] args) {

        for (BlobType btype : BlobType.getAvailable()) {

            if (CodeCacheUtils.isCodeHeapPredictable(btype)) {

                new UsageThresholdIncreasedTest(btype).runTest();

            }

        }

    }

    private void checkUsageThresholdCount(MemoryPoolMXBean bean, long count){

        Asserts.assertEQ(bean.getUsageThresholdCount(), count,

                String.format("Usage threshold was hit: %d times for %s "

                        + "Threshold value: %d with current usage: %d",

                        bean.getUsageThresholdCount(), bean.getName(),

                        bean.getUsageThreshold(), bean.getUsage().getUsed()));

    }

    protected void runTest() {

        long headerSize = CodeCacheUtils.getHeaderSize(btype);

        long allocationUnit = CodeCacheUtils.MIN_ALLOCATION - headerSize;

        MemoryPoolMXBean bean = btype.getMemoryPool();

        long initialCount = bean.getUsageThresholdCount();

        long initialSize = bean.getUsage().getUsed();

        bean.setUsageThreshold(initialSize + THRESHOLD_STEP);

        for (int i = 0; i < ALLOCATION_STEP - 1; i++) {

            CodeCacheUtils.WB.allocateCodeBlob(allocationUnit, btype.id);

        }

        // Usage threshold check is triggered by GC cycle, so, call it

        CodeCacheUtils.WB.fullGC();

        checkUsageThresholdCount(bean, initialCount);

        long filledSize = bean.getUsage().getUsed();

        bean.setUsageThreshold(filledSize + THRESHOLD_STEP);

        for (int i = 0; i < ALLOCATION_STEP - 1; i++) {

            CodeCacheUtils.WB.allocateCodeBlob(allocationUnit, btype.id);

        }

        CodeCacheUtils.WB.fullGC();

        checkUsageThresholdCount(bean, initialCount);

        System.out.println("INFO: Case finished successfully for " + bean.getName());

    }

}