jdk-24/jdk/test/sun/tools/jmap/heapconfig/JMapHeapConfigTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8042397
 * @summary Unit test for jmap utility test heap configuration reader
 * @library /lib/testlibrary
 * @build jdk.testlibrary.*
 * @build JMapHeapConfigTest LingeredApp TmtoolTestScenario
 * @run main JMapHeapConfigTest
 */
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.testlibrary.Utils;

public class JMapHeapConfigTest {

    static final String expectedJMapValues[] = {
        "MinHeapFreeRatio",
        "MaxHeapFreeRatio",
        "MaxHeapSize",
        "NewSize",
        "MaxNewSize",
        "OldSize",
        "NewRatio",
        "SurvivorRatio",
        "MetaspaceSize",
        "CompressedClassSpaceSize",
        "G1HeapRegionSize"};

    // ignoring MaxMetaspaceSize

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

        // Forward vm options to LingeredApp
        ArrayList<String> cmd = new ArrayList();
        cmd.addAll(Utils.getVmOptions());
        cmd.add("-XX:+PrintFlagsFinal");

        TmtoolTestScenario tmt = TmtoolTestScenario.create("jmap", "-heap");
        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");
    }
}