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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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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import java.io.IOException;

import java.math.BigDecimal;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import jdk.test.lib.apps.LingeredApp;

import jdk.testlibrary.Utils;

import jdk.testlibrary.Platform;

/*

 * @test

 * @bug 8042397

 * @summary Unit test for jmap utility test heap configuration reader

 * @library /test/lib/share/classes

 * @library /lib/testlibrary

 * @build jdk.testlibrary.*

 * @build jdk.test.lib.apps.*

 * @build JMapHeapConfigTest TmtoolTestScenario

 * @run main JMapHeapConfigTest

 */

public class JMapHeapConfigTest {

    static final String expectedJMapValues[] = {

        "MinHeapFreeRatio",

        "MaxHeapFreeRatio",

        "MaxHeapSize",

        "NewSize",

        "MaxNewSize",

        "OldSize",

        "NewRatio",

        "SurvivorRatio",

        "MetaspaceSize",

        "CompressedClassSpaceSize",

        "G1HeapRegionSize"};

    // ignoring MaxMetaspaceSize

    static final String desiredMaxHeapSize = "-Xmx128m";

    private static Map<String, String> parseJMapOutput(List<String> jmapOutput) {

        Map<String, String> heapConfigMap = new HashMap<String, String>();

        boolean shouldParse = false;

        for (String line : jmapOutput) {

            line = line.trim();

            if (line.startsWith("Heap Configuration:")) {

                shouldParse = true;

                continue;

            }

            if (line.startsWith("Heap Usage:")) {

                shouldParse = false;

                continue;

            }

            if (shouldParse && !line.equals("")) {

                String[] lv = line.split("\\s+");

                try {

                    heapConfigMap.put(lv[0], lv[2]);

                } catch (ArrayIndexOutOfBoundsException ex) {

                    // Ignore mailformed lines

                }

            }

        }

        return heapConfigMap;

    }

    // Compare stored values

    private static void compareValues(Map<String, String> parsedJMapOutput, Map<String, String> parsedVmOutput) {

        for (String key : expectedJMapValues) {

            try {

                String jmapVal = parsedJMapOutput.get(key);

                if (jmapVal == null) {

                    throw new RuntimeException("Key '" + key + "' doesn't exists in jmap output");

                }

                String vmVal = parsedVmOutput.get(key);

                if (vmVal == null) {

                    throw new RuntimeException("Key '" + key + "' doesn't exists in vm output");

                }

                if (new BigDecimal(jmapVal).compareTo(new BigDecimal(vmVal)) != 0) {

                    throw new RuntimeException(String.format("Key %s doesn't match %s vs %s", key, vmVal, jmapVal));

                }

            } catch (NumberFormatException ex) {

                throw new RuntimeException("Unexpected key '" + key + "' value", ex);

            }

        }

    }

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

        System.out.println("Starting JMapHeapConfigTest");

        if (!Platform.shouldSAAttach()) {

            // Silently skip the test if we don't have enough permissions to attach

            System.err.println("Error! Insufficient permissions to attach.");

            return;

        }

        if (!LingeredApp.isLastModifiedWorking()) {

            // Exact behaviour of the test depends to operating system and the test nature,

            // so just print the warning and continue

            System.err.println("Warning! Last modified time doesn't work.");

        }

        boolean mx_found = false;

        List<String> jvmOptions = Utils.getVmOptions();

        for (String option : jvmOptions) {

            if (option.startsWith("-Xmx")) {

               System.out.println("INFO: maximum heap size set by JTREG as " + option);

               mx_found = true;

               break;

           }

        }

        // Forward vm options to LingeredApp

        ArrayList<String> cmd = new ArrayList();

        cmd.addAll(Utils.getVmOptions());

        if (!mx_found) {

            cmd.add(desiredMaxHeapSize);

            System.out.println("INFO: maximum heap size set explicitly as " + desiredMaxHeapSize);

        }

        cmd.add("-XX:+PrintFlagsFinal");

        int exitcode = tmt.launch(cmd);

        if (exitcode != 0) {

            throw new RuntimeException("Test FAILED jmap exits with non zero exit code " + exitcode);

        }

        Map<String,String> parsedJmapOutput = parseJMapOutput(tmt.getToolOutput());

        Map<String,String> parsedVMOutput = tmt.parseFlagsFinal();

        compareValues(parsedJmapOutput, parsedVMOutput);

        // If test fails it throws RuntimeException

        System.out.println("Test PASSED");

    }

}