/*

 * Copyright (c) 2013, 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.

 */

/*

 * @test

 * @summary Test Reserve/Commit/Uncommit/Release of virtual memory and that we track it correctly

 * @key nmt jcmd

 * @library /testlibrary /testlibrary/whitebox

 * @build VirtualAllocTestType

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

 */

import com.oracle.java.testlibrary.*;

import sun.hotspot.WhiteBox;

public class VirtualAllocTestType {

  public static WhiteBox wb = WhiteBox.getWhiteBox();

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

    OutputAnalyzer output;

    long commitSize = 128 * 1024;

    long reserveSize = 256 * 1024;

    long addr;

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

    ProcessBuilder pb = new ProcessBuilder();

    addr = wb.NMTReserveMemory(reserveSize);

    mergeData();

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

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

    output.shouldContain("Test (reserved=256KB, committed=0KB)");

    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");

    wb.NMTCommitMemory(addr, commitSize);

    mergeData();

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

    output.shouldContain("Test (reserved=256KB, committed=128KB)");

    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");

    wb.NMTUncommitMemory(addr, commitSize);

    mergeData();

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

    output.shouldContain("Test (reserved=256KB, committed=0KB)");

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

    wb.NMTReleaseMemory(addr, reserveSize);

    mergeData();

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

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

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

  }

  public static void mergeData() throws Exception {

    // Use WB API to ensure that all data has been merged before we continue

    if (!wb.NMTWaitForDataMerge()) {

      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");

    }

  }

}