/*

 * Copyright (c) 2014, 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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 */

/*

 * @test

 * @summary Test reserve/commit/uncommit/release of virtual memory and that we track it correctly

 * @key nmt jcmd

 * @library /testlibrary /testlibrary/whitebox

 * @build VirtualAllocCommitUncommitRecommit

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

 *

 */

import com.oracle.java.testlibrary.*;

import sun.hotspot.WhiteBox;

public class VirtualAllocCommitUncommitRecommit {

    public static WhiteBox wb = WhiteBox.getWhiteBox();

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

        OutputAnalyzer output;

        long commitSize = 4 * 1024; // 4KB

        long reserveSize = 1024 * 1024; // 1024KB

        long addr;

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

        ProcessBuilder pb = new ProcessBuilder();

        boolean has_nmt_detail = wb.NMTIsDetailSupported();

        if (has_nmt_detail) {

            System.out.println("NMT detail support detected.");

        } else {

            System.out.println("NMT detail support not detected.");

        }

        // reserve

        addr = wb.NMTReserveMemory(reserveSize);

        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid,

                "VM.native_memory", "detail" });

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

        output.shouldContain("Test (reserved=1024KB, committed=0KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        long addrA = addr;

        long addrB = addr + commitSize;

        long addrC = addr + (2 * commitSize);

        long addrD = addr + (3 * commitSize);

        long addrE = addr + (4 * commitSize);

        long addrF = addr + (5 * commitSize);

        // commit ABCD

        wb.NMTCommitMemory(addrA, commitSize);

        wb.NMTCommitMemory(addrB, commitSize);

        wb.NMTCommitMemory(addrC, commitSize);

        wb.NMTCommitMemory(addrD, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=16KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // uncommit BC

        wb.NMTUncommitMemory(addrB, commitSize);

        wb.NMTUncommitMemory(addrC, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=8KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // commit EF

        wb.NMTCommitMemory(addrE, commitSize);

        wb.NMTCommitMemory(addrF, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=16KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // uncommit A

        wb.NMTUncommitMemory(addrA, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=12KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // commit ABC

        wb.NMTCommitMemory(addrA, commitSize);

        wb.NMTCommitMemory(addrB, commitSize);

        wb.NMTCommitMemory(addrC, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=24KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // uncommit ABCDEF

        wb.NMTUncommitMemory(addrA, commitSize);

        wb.NMTUncommitMemory(addrB, commitSize);

        wb.NMTUncommitMemory(addrC, commitSize);

        wb.NMTUncommitMemory(addrD, commitSize);

        wb.NMTUncommitMemory(addrE, commitSize);

        wb.NMTUncommitMemory(addrF, commitSize);

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

        output.shouldContain("Test (reserved=1024KB, committed=0KB)");

        if (has_nmt_detail) {

            output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

                    + Long.toHexString(addr + reserveSize)

                    + "\\] reserved 1024KB for Test");

        }

        // release

        wb.NMTReleaseMemory(addr, reserveSize);

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

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

        output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

    }

}