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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 | +} | |