| /* |
| * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.tools.attach; |
| |
| import com.sun.tools.attach.VirtualMachineDescriptor; |
| import com.sun.tools.attach.AttachPermission; |
| import com.sun.tools.attach.AttachNotSupportedException; |
| import com.sun.tools.attach.spi.AttachProvider; |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Set; |
| |
| import sun.jvmstat.monitor.HostIdentifier; |
| import sun.jvmstat.monitor.MonitoredHost; |
| import sun.jvmstat.monitor.MonitoredVm; |
| import sun.jvmstat.monitor.MonitoredVmUtil; |
| import sun.jvmstat.monitor.VmIdentifier; |
| |
| /* |
| * Platform specific provider implementations extend this |
| */ |
| public abstract class HotSpotAttachProvider extends AttachProvider { |
| |
| public HotSpotAttachProvider() { |
| } |
| |
| public void checkAttachPermission() { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| sm.checkPermission( |
| new AttachPermission("attachVirtualMachine") |
| ); |
| } |
| } |
| |
| /* |
| * This listVirtualMachines implementation is based on jvmstat. Can override |
| * this in platform implementations when there is a more efficient mechanism |
| * available. |
| */ |
| public List<VirtualMachineDescriptor> listVirtualMachines() { |
| ArrayList<VirtualMachineDescriptor> result = |
| new ArrayList<VirtualMachineDescriptor>(); |
| |
| MonitoredHost host; |
| Set<Integer> vms; |
| try { |
| host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null)); |
| vms = host.activeVms(); |
| } catch (Throwable t) { |
| if (t instanceof ExceptionInInitializerError) { |
| t = t.getCause(); |
| } |
| if (t instanceof ThreadDeath) { |
| throw (ThreadDeath)t; |
| } |
| if (t instanceof SecurityException) { |
| return result; |
| } |
| throw new InternalError(t); // shouldn't happen |
| } |
| |
| for (Integer vmid: vms) { |
| String pid = vmid.toString(); |
| String name = pid; // default to pid if name not available |
| boolean isAttachable = false; |
| MonitoredVm mvm = null; |
| try { |
| mvm = host.getMonitoredVm(new VmIdentifier(pid)); |
| try { |
| isAttachable = MonitoredVmUtil.isAttachable(mvm); |
| // use the command line as the display name |
| name = MonitoredVmUtil.commandLine(mvm); |
| } catch (Exception e) { |
| } |
| if (isAttachable) { |
| result.add(new HotSpotVirtualMachineDescriptor(this, pid, name)); |
| } |
| } catch (Throwable t) { |
| if (t instanceof ThreadDeath) { |
| throw (ThreadDeath)t; |
| } |
| } finally { |
| if (mvm != null) { |
| mvm.detach(); |
| } |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Test if a VM is attachable. If it's not attachable, |
| * an AttachNotSupportedException will be thrown. For example, |
| * 1.4.2 or 5.0 VM are not attachable. There are cases that |
| * we can't determine if a VM is attachable or not and this method |
| * will just return. |
| * |
| * This method uses the jvmstat counter to determine if a VM |
| * is attachable. If the target VM does not have a jvmstat |
| * share memory buffer, this method returns. |
| * |
| * @exception AttachNotSupportedException if it's not attachable |
| */ |
| void testAttachable(String id) throws AttachNotSupportedException { |
| MonitoredVm mvm = null; |
| try { |
| VmIdentifier vmid = new VmIdentifier(id); |
| MonitoredHost host = MonitoredHost.getMonitoredHost(vmid); |
| mvm = host.getMonitoredVm(vmid); |
| |
| if (MonitoredVmUtil.isAttachable(mvm)) { |
| // it's attachable; so return false |
| return; |
| } |
| } catch (Throwable t) { |
| if (t instanceof ThreadDeath) { |
| ThreadDeath td = (ThreadDeath)t; |
| throw td; |
| } |
| // we do not know what this id is |
| return; |
| } finally { |
| if (mvm != null) { |
| mvm.detach(); |
| } |
| } |
| |
| // we're sure it's not attachable; throw exception |
| throw new AttachNotSupportedException( |
| "The VM does not support the attach mechanism"); |
| } |
| |
| |
| /** |
| * A virtual machine descriptor to describe a HotSpot virtual machine. |
| */ |
| static class HotSpotVirtualMachineDescriptor extends VirtualMachineDescriptor { |
| HotSpotVirtualMachineDescriptor(AttachProvider provider, |
| String id, |
| String displayName) { |
| super(provider, id, displayName); |
| } |
| |
| public boolean isAttachable() { |
| return true; |
| } |
| } |
| } |