JDK 11 jdk.jconsole.jmod - JConsole Tool

JDK 11 jdk.jconsole.jmod is the JMOD file for JDK 11 JConsole tool, which can be invoked by the "jconsole" command.

JDK 11 JConsole tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jconsole.jmod.

JDK 11 JConsole tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 JConsole tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jconsole.

You can click and view the content of each source code file in the list below.

✍: FYIcenter

sun/tools/jconsole/LocalVirtualMachine.java

/*
 * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package sun.tools.jconsole;

import java.util.*;
import java.io.IOException;
import java.io.File;

import com.sun.tools.attach.VirtualMachine;
import com.sun.tools.attach.VirtualMachineDescriptor;
import com.sun.tools.attach.AttachNotSupportedException;

import jdk.internal.agent.ConnectorAddressLink;
import sun.jvmstat.monitor.HostIdentifier;
import sun.jvmstat.monitor.MonitoredHost;
import sun.jvmstat.monitor.MonitoredVm;
import sun.jvmstat.monitor.MonitoredVmUtil;
import sun.jvmstat.monitor.MonitorException;
import sun.jvmstat.monitor.VmIdentifier;

public class LocalVirtualMachine {
    private String address;
    private String commandLine;
    private String displayName;
    private int vmid;
    private boolean isAttachSupported;

    public LocalVirtualMachine(int vmid, String commandLine, boolean canAttach, String connectorAddress) {
        this.vmid = vmid;
        this.commandLine = commandLine;
        this.address = connectorAddress;
        this.isAttachSupported = canAttach;
        this.displayName = getDisplayName(commandLine);
    }

    private static String getDisplayName(String commandLine) {
        // trim the pathname of jar file if it's a jar
        String[] res = commandLine.split(" ", 2);
        if (res[0].endsWith(".jar")) {
           File jarfile = new File(res[0]);
           String displayName = jarfile.getName();
           if (res.length == 2) {
               displayName += " " + res[1];
           }
           return displayName;
        }
        return commandLine;
    }

    public int vmid() {
        return vmid;
    }

    public boolean isManageable() {
        return (address != null);
    }

    public boolean isAttachable() {
        return isAttachSupported;
    }

    public void startManagementAgent() throws IOException {
        if (address != null) {
            // already started
            return;
        }

        if (!isAttachable()) {
            throw new IOException("This virtual machine \"" + vmid +
                "\" does not support dynamic attach.");
        }

        loadManagementAgent();
        // fails to load or start the management agent
        if (address == null) {
            // should never reach here
            throw new IOException("Fails to find connector address");
        }
    }

    public String connectorAddress() {
        // return null if not available or no JMX agent
        return address;
    }

    public String displayName() {
        return displayName;
    }

    public String toString() {
        return commandLine;
    }

    // This method returns the list of all virtual machines currently
    // running on the machine
    public static Map<Integer, LocalVirtualMachine> getAllVirtualMachines() {
        Map<Integer, LocalVirtualMachine> map =
            new HashMap<Integer, LocalVirtualMachine>();
        getMonitoredVMs(map);
        getAttachableVMs(map);
        return map;
    }

    private static void getMonitoredVMs(Map<Integer, LocalVirtualMachine> map) {
        MonitoredHost host;
        Set<Integer> vms;
        try {
            host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null));
            vms = host.activeVms();
        } catch (java.net.URISyntaxException | MonitorException x) {
            throw new InternalError(x.getMessage(), x);
        }
        for (Object vmid: vms) {
            if (vmid instanceof Integer) {
                int pid = ((Integer) vmid).intValue();
                String name = vmid.toString(); // default to pid if name not available
                boolean attachable = false;
                String address = null;
                try {
                     MonitoredVm mvm = host.getMonitoredVm(new VmIdentifier(name));
                     // use the command line as the display name
                     name =  MonitoredVmUtil.commandLine(mvm);
                     attachable = MonitoredVmUtil.isAttachable(mvm);
                     address = ConnectorAddressLink.importFrom(pid);
                     mvm.detach();
                } catch (Exception x) {
                     // ignore
                }
                map.put((Integer) vmid,
                        new LocalVirtualMachine(pid, name, attachable, address));
            }
        }
    }

    private static final String LOCAL_CONNECTOR_ADDRESS_PROP =
        "com.sun.management.jmxremote.localConnectorAddress";

    private static void getAttachableVMs(Map<Integer, LocalVirtualMachine> map) {
        List<VirtualMachineDescriptor> vms = VirtualMachine.list();
        for (VirtualMachineDescriptor vmd : vms) {
            try {
                Integer vmid = Integer.valueOf(vmd.id());
                if (!map.containsKey(vmid)) {
                    boolean attachable = false;
                    String address = null;
                    try {
                        VirtualMachine vm = VirtualMachine.attach(vmd);
                        attachable = true;
                        Properties agentProps = vm.getAgentProperties();
                        address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
                        vm.detach();
                    } catch (AttachNotSupportedException x) {
                        // not attachable
                    } catch (IOException x) {
                        // ignore
                    }
                    map.put(vmid, new LocalVirtualMachine(vmid.intValue(),
                                                          vmd.displayName(),
                                                          attachable,
                                                          address));
                }
            } catch (NumberFormatException e) {
                // do not support vmid different than pid
            }
        }
    }

    public static LocalVirtualMachine getLocalVirtualMachine(int vmid) {
        Map<Integer, LocalVirtualMachine> map = getAllVirtualMachines();
        LocalVirtualMachine lvm = map.get(vmid);
        if (lvm == null) {
            // Check if the VM is attachable but not included in the list
            // if it's running with a different security context.
            // For example, Windows services running
            // local SYSTEM account are attachable if you have Adminstrator
            // privileges.
            boolean attachable = false;
            String address = null;
            String name = String.valueOf(vmid); // default display name to pid
            try {
                VirtualMachine vm = VirtualMachine.attach(name);
                attachable = true;
                Properties agentProps = vm.getAgentProperties();
                address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
                vm.detach();
                lvm = new LocalVirtualMachine(vmid, name, attachable, address);
            } catch (AttachNotSupportedException x) {
                // not attachable
                if (JConsole.isDebug()) {
                    x.printStackTrace();
                }
            } catch (IOException x) {
                // ignore
                if (JConsole.isDebug()) {
                    x.printStackTrace();
                }
            }
        }
        return lvm;
    }

    // load the management agent into the target VM
    private void loadManagementAgent() throws IOException {
        VirtualMachine vm = null;
        String name = String.valueOf(vmid);
        try {
            vm = VirtualMachine.attach(name);
        } catch (AttachNotSupportedException x) {
            IOException ioe = new IOException(x.getMessage());
            ioe.initCause(x);
            throw ioe;
        }

        vm.startLocalManagementAgent();

        // get the connector address
        Properties agentProps = vm.getAgentProperties();
        address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);

        vm.detach();
    }
}

sun/tools/jconsole/LocalVirtualMachine.java

 

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