1/* 2 * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.tools.jconsole; 27 28import java.util.*; 29import java.io.IOException; 30import java.io.File; 31 32import com.sun.tools.attach.VirtualMachine; 33import com.sun.tools.attach.VirtualMachineDescriptor; 34import com.sun.tools.attach.AttachNotSupportedException; 35 36import jdk.internal.agent.ConnectorAddressLink; 37import sun.jvmstat.monitor.HostIdentifier; 38import sun.jvmstat.monitor.MonitoredHost; 39import sun.jvmstat.monitor.MonitoredVm; 40import sun.jvmstat.monitor.MonitoredVmUtil; 41import sun.jvmstat.monitor.MonitorException; 42import sun.jvmstat.monitor.VmIdentifier; 43 44public class LocalVirtualMachine { 45 private String address; 46 private String commandLine; 47 private String displayName; 48 private int vmid; 49 private boolean isAttachSupported; 50 51 public LocalVirtualMachine(int vmid, String commandLine, boolean canAttach, String connectorAddress) { 52 this.vmid = vmid; 53 this.commandLine = commandLine; 54 this.address = connectorAddress; 55 this.isAttachSupported = canAttach; 56 this.displayName = getDisplayName(commandLine); 57 } 58 59 private static String getDisplayName(String commandLine) { 60 // trim the pathname of jar file if it's a jar 61 String[] res = commandLine.split(" ", 2); 62 if (res[0].endsWith(".jar")) { 63 File jarfile = new File(res[0]); 64 String displayName = jarfile.getName(); 65 if (res.length == 2) { 66 displayName += " " + res[1]; 67 } 68 return displayName; 69 } 70 return commandLine; 71 } 72 73 public int vmid() { 74 return vmid; 75 } 76 77 public boolean isManageable() { 78 return (address != null); 79 } 80 81 public boolean isAttachable() { 82 return isAttachSupported; 83 } 84 85 public void startManagementAgent() throws IOException { 86 if (address != null) { 87 // already started 88 return; 89 } 90 91 if (!isAttachable()) { 92 throw new IOException("This virtual machine \"" + vmid + 93 "\" does not support dynamic attach."); 94 } 95 96 loadManagementAgent(); 97 // fails to load or start the management agent 98 if (address == null) { 99 // should never reach here 100 throw new IOException("Fails to find connector address"); 101 } 102 } 103 104 public String connectorAddress() { 105 // return null if not available or no JMX agent 106 return address; 107 } 108 109 public String displayName() { 110 return displayName; 111 } 112 113 public String toString() { 114 return commandLine; 115 } 116 117 // This method returns the list of all virtual machines currently 118 // running on the machine 119 public static Map<Integer, LocalVirtualMachine> getAllVirtualMachines() { 120 Map<Integer, LocalVirtualMachine> map = 121 new HashMap<Integer, LocalVirtualMachine>(); 122 getMonitoredVMs(map); 123 getAttachableVMs(map); 124 return map; 125 } 126 127 private static void getMonitoredVMs(Map<Integer, LocalVirtualMachine> map) { 128 MonitoredHost host; 129 Set<Integer> vms; 130 try { 131 host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null)); 132 vms = host.activeVms(); 133 } catch (java.net.URISyntaxException | MonitorException x) { 134 throw new InternalError(x.getMessage(), x); 135 } 136 for (Object vmid: vms) { 137 if (vmid instanceof Integer) { 138 int pid = ((Integer) vmid).intValue(); 139 String name = vmid.toString(); // default to pid if name not available 140 boolean attachable = false; 141 String address = null; 142 try { 143 MonitoredVm mvm = host.getMonitoredVm(new VmIdentifier(name)); 144 // use the command line as the display name 145 name = MonitoredVmUtil.commandLine(mvm); 146 attachable = MonitoredVmUtil.isAttachable(mvm); 147 address = ConnectorAddressLink.importFrom(pid); 148 mvm.detach(); 149 } catch (Exception x) { 150 // ignore 151 } 152 map.put((Integer) vmid, 153 new LocalVirtualMachine(pid, name, attachable, address)); 154 } 155 } 156 } 157 158 private static final String LOCAL_CONNECTOR_ADDRESS_PROP = 159 "com.sun.management.jmxremote.localConnectorAddress"; 160 161 private static void getAttachableVMs(Map<Integer, LocalVirtualMachine> map) { 162 List<VirtualMachineDescriptor> vms = VirtualMachine.list(); 163 for (VirtualMachineDescriptor vmd : vms) { 164 try { 165 Integer vmid = Integer.valueOf(vmd.id()); 166 if (!map.containsKey(vmid)) { 167 boolean attachable = false; 168 String address = null; 169 try { 170 VirtualMachine vm = VirtualMachine.attach(vmd); 171 attachable = true; 172 Properties agentProps = vm.getAgentProperties(); 173 address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP); 174 vm.detach(); 175 } catch (AttachNotSupportedException x) { 176 // not attachable 177 } catch (IOException x) { 178 // ignore 179 } 180 map.put(vmid, new LocalVirtualMachine(vmid.intValue(), 181 vmd.displayName(), 182 attachable, 183 address)); 184 } 185 } catch (NumberFormatException e) { 186 // do not support vmid different than pid 187 } 188 } 189 } 190 191 public static LocalVirtualMachine getLocalVirtualMachine(int vmid) { 192 Map<Integer, LocalVirtualMachine> map = getAllVirtualMachines(); 193 LocalVirtualMachine lvm = map.get(vmid); 194 if (lvm == null) { 195 // Check if the VM is attachable but not included in the list 196 // if it's running with a different security context. 197 // For example, Windows services running 198 // local SYSTEM account are attachable if you have Adminstrator 199 // privileges. 200 boolean attachable = false; 201 String address = null; 202 String name = String.valueOf(vmid); // default display name to pid 203 try { 204 VirtualMachine vm = VirtualMachine.attach(name); 205 attachable = true; 206 Properties agentProps = vm.getAgentProperties(); 207 address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP); 208 vm.detach(); 209 lvm = new LocalVirtualMachine(vmid, name, attachable, address); 210 } catch (AttachNotSupportedException x) { 211 // not attachable 212 if (JConsole.isDebug()) { 213 x.printStackTrace(); 214 } 215 } catch (IOException x) { 216 // ignore 217 if (JConsole.isDebug()) { 218 x.printStackTrace(); 219 } 220 } 221 } 222 return lvm; 223 } 224 225 // load the management agent into the target VM 226 private void loadManagementAgent() throws IOException { 227 VirtualMachine vm = null; 228 String name = String.valueOf(vmid); 229 try { 230 vm = VirtualMachine.attach(name); 231 } catch (AttachNotSupportedException x) { 232 IOException ioe = new IOException(x.getMessage()); 233 ioe.initCause(x); 234 throw ioe; 235 } 236 237 vm.startLocalManagementAgent(); 238 239 // get the connector address 240 Properties agentProps = vm.getAgentProperties(); 241 address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP); 242 243 vm.detach(); 244 } 245} 246