/*

 * 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.

 *

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 */

/*

 * @test

 * @summary Test consistency of NMT by creating allocations of the Test type with various sizes and verifying visibility with jcmd

 * @key nmt jcmd

 * @library /testlibrary /test/lib

 * @modules java.base/sun.misc

 *          java.management

 * @build MallocRoundingReportTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest

 *

 */

import jdk.test.lib.*;

import sun.hotspot.WhiteBox;

public class MallocRoundingReportTest {

    private static long K = 1024;

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

        OutputAnalyzer output;

        WhiteBox wb = WhiteBox.getWhiteBox();

        // Grab my own PID

        String pid = Integer.toString(ProcessTools.getProcessId());

        ProcessBuilder pb = new ProcessBuilder();

        long[] additionalBytes = {0, 1, 512, 650};

        long[] kByteSize = {1024, 2048};

        long mallocd_total = 0;

        for ( int i = 0; i < kByteSize.length; i++)

        {

            for (int j = 0; j < (additionalBytes.length); j++) {

                long curKB = kByteSize[i] + additionalBytes[j];

                // round up/down to the nearest KB to match NMT reporting

                long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K;

                // Use WB API to alloc and free with the mtTest type

                mallocd_total = wb.NMTMalloc(curKB);

                // Run 'jcmd <pid> VM.native_memory summary', check for expected output

                // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB

                String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)");

                pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });

                output = new OutputAnalyzer(pb.start());

                output.shouldContain(expectedOut);

                wb.NMTFree(mallocd_total);

                // Run 'jcmd <pid> VM.native_memory summary', check for expected output

                pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });

                output = new OutputAnalyzer(pb.start());

                output.shouldNotContain("Test (reserved=");

            }

        }

    }

}