test/jtreg-ext/requires/VMProps.java
author mullan
Thu, 19 Jan 2017 13:50:02 -0500
changeset 43221 eef9383d25cb
parent 42512 9e1dfd06e954
child 43389 53ff01a9206a
permissions -rw-r--r--
8055206: Update SecurityManager::checkPackageAccess to restrict non-exported JDK packages by default Reviewed-by: mchung
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/*
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 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package requires;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.nio.file.StandardOpenOption;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.Callable;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import sun.hotspot.gc.GC;
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import sun.hotspot.WhiteBox;
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/**
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 * The Class to be invoked by jtreg prior Test Suite execution to
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 * collect information about VM.
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 * Do not use any API's that may not be available in all target VMs.
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 * Properties set by this Class will be available in the @requires expressions.
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 */
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public class VMProps implements Callable<Map<String, String>> {
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    private static final WhiteBox WB = WhiteBox.getWhiteBox();
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    /**
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     * Collects information about VM properties.
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     * This method will be invoked by jtreg.
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     *
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     * @return Map of property-value pairs.
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     */
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    @Override
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    public Map<String, String> call() {
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        Map<String, String> map = new HashMap<>();
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        map.put("vm.flavor", vmFlavor());
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        map.put("vm.compMode", vmCompMode());
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        map.put("vm.bits", vmBits());
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        map.put("vm.flightRecorder", vmFlightRecorder());
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        map.put("vm.simpleArch", vmArch());
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        map.put("vm.debug", vmDebug());
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        map.put("vm.jvmci", vmJvmci());
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        vmGC(map); // vm.gc.X = true/false
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        VMProps.dump(map);
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        return map;
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    }
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    /**
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     * @return vm.simpleArch value of "os.simpleArch" property of tested JDK.
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     */
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    protected String vmArch() {
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        String arch = System.getProperty("os.arch");
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        if (arch.equals("x86_64") || arch.equals("amd64")) {
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            return "x64";
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        }
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        else if (arch.contains("86")) {
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            return "x86";
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        } else {
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            return arch;
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        }
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    }
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    /**
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     * @return VM type value extracted from the "java.vm.name" property.
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     */
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    protected String vmFlavor() {
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        // E.g. "Java HotSpot(TM) 64-Bit Server VM"
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        String vmName = System.getProperty("java.vm.name");
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        if (vmName == null) {
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            return null;
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        }
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        Pattern startP = Pattern.compile(".* (\\S+) VM");
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        Matcher m = startP.matcher(vmName);
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        if (m.matches()) {
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            return m.group(1).toLowerCase();
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        }
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        return null;
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    }
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    /**
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     * @return VM compilation mode extracted from the "java.vm.info" property.
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     */
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    protected String vmCompMode() {
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        // E.g. "mixed mode"
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        String vmInfo = System.getProperty("java.vm.info");
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        if (vmInfo == null) {
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            return null;
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        }
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        int k = vmInfo.toLowerCase().indexOf(" mode");
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        if (k < 0) {
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            return null;
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        }
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        vmInfo = vmInfo.substring(0, k);
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        switch (vmInfo) {
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            case "mixed" : return "Xmixed";
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            case "compiled" : return "Xcomp";
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            case "interpreted" : return "Xint";
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            default: return null;
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        }
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    }
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    /**
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     * @return VM bitness, the value of the "sun.arch.data.model" property.
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     */
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    protected String vmBits() {
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        return System.getProperty("sun.arch.data.model");
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    }
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    /**
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     * @return "true" if Flight Recorder is enabled, "false" if is disabled.
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     */
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    protected String vmFlightRecorder() {
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        Boolean isUnlockedCommercialFatures = WB.getBooleanVMFlag("UnlockCommercialFeatures");
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        Boolean isFlightRecorder = WB.getBooleanVMFlag("FlightRecorder");
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        String startFROptions = WB.getStringVMFlag("StartFlightRecording");
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        if (isUnlockedCommercialFatures != null && isUnlockedCommercialFatures) {
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            if (isFlightRecorder != null && isFlightRecorder) {
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                return "true";
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            }
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            if (startFROptions != null && !startFROptions.isEmpty()) {
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                return "true";
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            }
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        }
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        return "false";
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    }
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    /**
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     * @return debug level value extracted from the "jdk.debug" property.
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     */
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    protected String vmDebug() {
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        return "" + System.getProperty("jdk.debug").contains("debug");
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    }
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    /**
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     * @return true if VM supports JVMCI and false otherwise
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     */
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    protected String vmJvmci() {
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        // builds with jvmci have this flag
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        return "" + (WB.getBooleanVMFlag("EnableJVMCI") != null);
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    }
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    /**
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     * For all existing GC sets vm.gc.X property.
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     * Example vm.gc.G1=true means:
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     *    VM supports G1
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     *    User either set G1 explicitely (-XX:+UseG1GC) or did not set any GC
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     * @param map - property-value pairs
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     */
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    protected void vmGC(Map<String, String> map){
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        GC currentGC = GC.current();
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        boolean isByErgo = GC.currentSetByErgo();
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        List<GC> supportedGC = GC.allSupported();
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        for (GC gc: GC.values()) {
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            boolean isSupported = supportedGC.contains(gc);
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            boolean isAcceptable = isSupported && (gc == currentGC || isByErgo);
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            map.put("vm.gc." + gc.name(), "" + isAcceptable);
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        }
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    }
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    /**
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     * Dumps the map to the file if the file name is given as the property.
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     * This functionality could be helpful to know context in the real
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     * execution.
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     *
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     * @param map
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     */
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    protected static void dump(Map<String, String> map) {
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        String dumpFileName = System.getProperty("vmprops.dump");
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        if (dumpFileName == null) {
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            return;
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        }
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        List<String> lines = new ArrayList<>();
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        map.forEach((k, v) -> lines.add(k + ":" + v));
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        try {
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            Files.write(Paths.get(dumpFileName), lines, StandardOpenOption.APPEND);
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        } catch (IOException e) {
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            throw new RuntimeException("Failed to dump properties into '"
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                    + dumpFileName + "'", e);
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        }
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    }
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    /**
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     * This method is for the testing purpose only.
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     * @param args
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     */
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    public static void main(String args[]) {
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        Map<String, String> map = new VMProps().call();
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        map.forEach((k, v) -> System.out.println(k + ": '" + v + "'"));
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    }
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}