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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2011, 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 | package sun.tools.attach; | ||
| 26 | |||
| 27 | import com.sun.tools.attach.VirtualMachineDescriptor; | ||
| 28 | import com.sun.tools.attach.VirtualMachine; | ||
| 29 | import com.sun.tools.attach.AttachPermission; | ||
| 30 | import com.sun.tools.attach.AttachNotSupportedException; | ||
| 31 | import com.sun.tools.attach.spi.AttachProvider; | ||
| 32 | |||
| 33 | import java.io.IOException; | ||
| 34 | import java.util.List; | ||
| 35 | import java.util.Iterator; | ||
| 36 | import java.util.ArrayList; | ||
| 37 | import java.util.Set; | ||
| 38 | import java.net.URISyntaxException; | ||
| 39 | |||
| 40 | import sun.jvmstat.monitor.HostIdentifier; | ||
| 41 | import sun.jvmstat.monitor.Monitor; | ||
| 42 | import sun.jvmstat.monitor.MonitoredHost; | ||
| 43 | import sun.jvmstat.monitor.MonitoredVm; | ||
| 44 | import sun.jvmstat.monitor.MonitoredVmUtil; | ||
| 45 | import sun.jvmstat.monitor.VmIdentifier; | ||
| 46 | import sun.jvmstat.monitor.MonitorException; | ||
| 47 | |||
| 48 | /* | ||
| 49 | * Platform specific provider implementations extend this | ||
| 50 | */ | ||
| 51 | public abstract class HotSpotAttachProvider extends AttachProvider { | ||
| 52 | |||
| 53 | // perf count name for the JVM version | ||
| 54 | private static final String JVM_VERSION = "java.property.java.vm.version"; | ||
| 55 | |||
| 56 | public HotSpotAttachProvider() { | ||
| 57 | } | ||
| 58 | |||
| 59 | public void checkAttachPermission() { | ||
| 60 | SecurityManager sm = System.getSecurityManager(); | ||
| 61 | if (sm != null) { | ||
| 62 | sm.checkPermission( | ||
| 63 | new AttachPermission("attachVirtualMachine") | ||
| 64 | ); | ||
| 65 | } | ||
| 66 | } | ||
| 67 | |||
| 68 | /* | ||
| 69 | * This listVirtualMachines implementation is based on jvmstat. Can override | ||
| 70 | * this in platform implementations when there is a more efficient mechanism | ||
| 71 | * available. | ||
| 72 | */ | ||
| 73 | public List<VirtualMachineDescriptor> listVirtualMachines() { | ||
| 74 | ArrayList<VirtualMachineDescriptor> result = | ||
| 75 | new ArrayList<VirtualMachineDescriptor>(); | ||
| 76 | |||
| 77 | MonitoredHost host; | ||
| 78 | Set vms; | ||
| 79 | try { | ||
| 80 | host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null)); | ||
| 81 | vms = host.activeVms(); | ||
| 82 | } catch (Throwable t) { | ||
| 83 | if (t instanceof ExceptionInInitializerError) { | ||
| 84 | t = t.getCause(); | ||
| 85 | } | ||
| 86 | if (t instanceof ThreadDeath) { | ||
| 87 | throw (ThreadDeath)t; | ||
| 88 | } | ||
| 89 | if (t instanceof SecurityException) { | ||
| 90 | return result; | ||
| 91 | } | ||
| 92 | throw new InternalError(); // shouldn't happen | ||
| 93 | } | ||
| 94 | |||
| 95 | for (Object vmid: vms) { | ||
| 96 | if (vmid instanceof Integer) { | ||
| 97 | String pid = vmid.toString(); | ||
| 98 | String name = pid; // default to pid if name not available | ||
| 99 | boolean isAttachable = false; | ||
| 100 | MonitoredVm mvm = null; | ||
| 101 | try { | ||
| 102 | mvm = host.getMonitoredVm(new VmIdentifier(pid)); | ||
| 103 | try { | ||
| 104 | isAttachable = MonitoredVmUtil.isAttachable(mvm); | ||
| 105 | // use the command line as the display name | ||
| 106 | name = MonitoredVmUtil.commandLine(mvm); | ||
| 107 | } catch (Exception e) { | ||
| 108 | } | ||
| 109 | if (isAttachable) { | ||
| 110 | result.add(new HotSpotVirtualMachineDescriptor(this, pid, name)); | ||
| 111 | } | ||
| 112 | } catch (Throwable t) { | ||
| 113 | if (t instanceof ThreadDeath) { | ||
| 114 | throw (ThreadDeath)t; | ||
| 115 | } | ||
| 116 | } finally { | ||
| 117 | if (mvm != null) { | ||
| 118 | mvm.detach(); | ||
| 119 | } | ||
| 120 | } | ||
| 121 | } | ||
| 122 | } | ||
| 123 | return result; | ||
| 124 | } | ||
| 125 | |||
| 126 | /** | ||
| 127 | * Test if a VM is attachable. If it's not attachable, | ||
| 128 | * an AttachNotSupportedException will be thrown. For example, | ||
| 129 | * 1.4.2 or 5.0 VM are not attachable. There are cases that | ||
| 130 | * we can't determine if a VM is attachable or not and this method | ||
| 131 | * will just return. | ||
| 132 | * | ||
| 133 | * This method uses the jvmstat counter to determine if a VM | ||
| 134 | * is attachable. If the target VM does not have a jvmstat | ||
| 135 | * share memory buffer, this method returns. | ||
| 136 | * | ||
| 137 | * @exception AttachNotSupportedException if it's not attachable | ||
| 138 | */ | ||
| 139 | void testAttachable(String id) throws AttachNotSupportedException { | ||
| 140 | MonitoredVm mvm = null; | ||
| 141 | try { | ||
| 142 | VmIdentifier vmid = new VmIdentifier(id); | ||
| 143 | MonitoredHost host = MonitoredHost.getMonitoredHost(vmid); | ||
| 144 | mvm = host.getMonitoredVm(vmid); | ||
| 145 | |||
| 146 | if (MonitoredVmUtil.isAttachable(mvm)) { | ||
| 147 | // it's attachable; so return false | ||
| 148 | return; | ||
| 149 | } | ||
| 150 | } catch (Throwable t) { | ||
| 151 | if (t instanceof ThreadDeath) { | ||
| 152 | ThreadDeath td = (ThreadDeath)t; | ||
| 153 | throw td; | ||
| 154 | } | ||
| 155 | // we do not know what this id is | ||
| 156 | return; | ||
| 157 | } finally { | ||
| 158 | if (mvm != null) { | ||
| 159 | mvm.detach(); | ||
| 160 | } | ||
| 161 | } | ||
| 162 | |||
| 163 | // we're sure it's not attachable; throw exception | ||
| 164 | throw new AttachNotSupportedException( | ||
| 165 | "The VM does not support the attach mechanism"); | ||
| 166 | } | ||
| 167 | |||
| 168 | |||
| 169 | /** | ||
| 170 | * A virtual machine descriptor to describe a HotSpot virtual machine. | ||
| 171 | */ | ||
| 172 | static class HotSpotVirtualMachineDescriptor extends VirtualMachineDescriptor { | ||
| 173 | HotSpotVirtualMachineDescriptor(AttachProvider provider, | ||
| 174 | String id, | ||
| 175 | String displayName) { | ||
| 176 | super(provider, id, displayName); | ||
| 177 | } | ||
| 178 | |||
| 179 | public boolean isAttachable() { | ||
| 180 | return true; | ||
| 181 | } | ||
| 182 | } | ||
| 183 | } | ||