/*

 * Copyright (c) 2013, 2016, 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 java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.io.Reader;

import java.nio.CharBuffer;

import java.util.Arrays;

import java.util.Scanner;

import jdk.test.lib.Asserts;

import jdk.test.lib.JDKToolFinder;

import jdk.test.lib.JDKToolLauncher;

import jdk.test.lib.OutputAnalyzer;

import jdk.test.lib.Platform;

import jdk.test.lib.ProcessTools;

/*

 * @test

 * @bug 6313383

 * @key regression

 * @summary Regression test for hprof export issue due to large heaps (>2G)

 * @library /testlibrary

 * @modules java.base/jdk.internal.misc

 *          java.compiler

 *          java.management/sun.management

 *          jdk.jvmstat/sun.jvmstat.monitor

 * @build jdk.test.lib.* JMapHProfLargeHeapProc

 * @run main JMapHProfLargeHeapTest

 */

public class JMapHProfLargeHeapTest {

    private static final String HPROF_HEADER_1_0_2 = "JAVA PROFILE 1.0.2";

    private static final long M = 1024L;

    private static final long G = 1024L * M;

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

        }

        // All heap dumps should create 1.0.2 file format

        /**

         * This test was deliberately commented out since the test system lacks

         * support to handle the requirements for this kind of heap size in a

         * good way. If or when it becomes possible to run this kind of tests in

         * the test environment the test should be enabled again.

         * */

        // Large heap 2,2 gigabytes, should create 1.0.2 file format

        // testHProfFileFormat("-Xmx4g", 2 * G + 2 * M, HPROF_HEADER_1_0_2);

    }

    private static void testHProfFileFormat(String vmArgs, long heapSize,

            String expectedFormat) throws Exception, IOException,

            InterruptedException, FileNotFoundException {

        ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(

                "-XaddExports:java.management/sun.management=ALL-UNNAMED", vmArgs, "JMapHProfLargeHeapProc", String.valueOf(heapSize));

        procBuilder.redirectError(ProcessBuilder.Redirect.INHERIT);

        Process largeHeapProc = procBuilder.start();

        try (Scanner largeHeapScanner = new Scanner(

                largeHeapProc.getInputStream());) {

            String pidstring = null;

            while ((pidstring = largeHeapScanner.findInLine("PID\\[[0-9].*\\]")) == null) {

                Thread.sleep(500);

            }

            int pid = Integer.parseInt(pidstring.substring(4,

                    pidstring.length() - 1));

            System.out.println("Extracted pid: " + pid);

            JDKToolLauncher jMapLauncher = JDKToolLauncher

            jMapLauncher.addToolArg(String.valueOf(pid));

            ProcessBuilder jMapProcessBuilder = new ProcessBuilder(

                    jMapLauncher.getCommand());

            System.out.println("jmap command: "

                    + Arrays.toString(jMapLauncher.getCommand()));

            Process jMapProcess = jMapProcessBuilder.start();

            OutputAnalyzer analyzer = new OutputAnalyzer(jMapProcess);

            analyzer.shouldHaveExitValue(0);

            largeHeapProc.getOutputStream().write('\n');

            Asserts.assertTrue(dumpFile.exists(), "Heap dump file not found.");

            try (Reader reader = new BufferedReader(new FileReader(dumpFile))) {

                CharBuffer buf = CharBuffer.allocate(expectedFormat.length());

                reader.read(buf);

                buf.clear();

                Asserts.assertEQ(buf.toString(), expectedFormat,

                        "Wrong file format. Expected '" + expectedFormat

                                + "', but found '" + buf.toString() + "'");

            }

            System.out.println("Success!");

        } finally {

            largeHeapProc.destroyForcibly();

        }

    }

}