J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package sun.tools.attach; |
| 26 | |
| 27 | import com.sun.tools.attach.VirtualMachine; |
| 28 | import com.sun.tools.attach.VirtualMachineDescriptor; |
| 29 | import com.sun.tools.attach.AttachNotSupportedException; |
| 30 | |
| 31 | import java.util.ArrayList; |
| 32 | import java.util.List; |
| 33 | import java.io.IOException; |
| 34 | import java.net.InetAddress; |
| 35 | import java.net.UnknownHostException; |
| 36 | |
| 37 | public class WindowsAttachProvider extends HotSpotAttachProvider { |
| 38 | |
| 39 | public WindowsAttachProvider() { |
| 40 | String os = System.getProperty("os.name"); |
| 41 | if (os.startsWith("Windows 9") || os.equals("Windows Me")) { |
| 42 | throw new RuntimeException( |
| 43 | "This provider is not supported on this version of Windows"); |
| 44 | } |
| 45 | String arch = System.getProperty("os.arch"); |
| 46 | if (!arch.equals("x86") && !arch.equals("amd64")) { |
| 47 | throw new RuntimeException( |
| 48 | "This provider is not supported on this processor architecture"); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | public String name() { |
| 53 | return "sun"; |
| 54 | } |
| 55 | |
| 56 | public String type() { |
| 57 | return "windows"; |
| 58 | } |
| 59 | |
| 60 | public VirtualMachine attachVirtualMachine(String vmid) |
| 61 | throws AttachNotSupportedException, IOException |
| 62 | { |
| 63 | checkAttachPermission(); |
| 64 | |
| 65 | // AttachNotSupportedException will be thrown if the target VM can be determined |
| 66 | // to be not attachable. |
| 67 | testAttachable(vmid); |
| 68 | |
| 69 | return new WindowsVirtualMachine(this, vmid); |
| 70 | } |
| 71 | |
| 72 | public List<VirtualMachineDescriptor> listVirtualMachines() { |
| 73 | // If the temporary file system is secure then we use the default |
| 74 | // implementation, otherwise we create a list of Windows processes. |
| 75 | if (isTempPathSecure()) { |
| 76 | return super.listVirtualMachines(); |
| 77 | } else { |
| 78 | return listJavaProcesses(); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Returns true if the temporary file system supports security |
| 84 | */ |
| 85 | private static boolean isTempPathSecure() { |
| 86 | if (!wasTempPathChecked) { |
| 87 | synchronized (WindowsAttachProvider.class) { |
| 88 | if (!wasTempPathChecked) { |
| 89 | // get the value of TMP/TEMP, ignoring UNC, and paths that |
| 90 | // aren't absolute |
| 91 | String temp = tempPath(); |
| 92 | if ((temp != null) && (temp.length() >= 3) && |
| 93 | (temp.charAt(1) == ':') && (temp.charAt(2) == '\\')) |
| 94 | { |
| 95 | // check if the volume supports security |
| 96 | long flags = volumeFlags(temp.substring(0, 3)); |
| 97 | isTempPathSecure = ((flags & FS_PERSISTENT_ACLS) != 0); |
| 98 | } |
| 99 | wasTempPathChecked = true; |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | return isTempPathSecure; |
| 105 | } |
| 106 | |
| 107 | // flag to indicate persistent ACLs are supported |
| 108 | private static final long FS_PERSISTENT_ACLS = 0x8L; |
| 109 | |
| 110 | // indicates if we've checked the temporary file system |
| 111 | private static volatile boolean wasTempPathChecked; |
| 112 | |
| 113 | // indicates if the temporary file system is secure (only valid when |
| 114 | // wasTempPathChecked is true) |
| 115 | private static boolean isTempPathSecure; |
| 116 | |
| 117 | // returns the value of TMP/TEMP |
| 118 | private static native String tempPath(); |
| 119 | |
| 120 | // returns the flags for the given volume |
| 121 | private static native long volumeFlags(String volume); |
| 122 | |
| 123 | |
| 124 | /** |
| 125 | * Returns a list of virtual machine descriptors derived from an enumeration |
| 126 | * of the process list. |
| 127 | */ |
| 128 | private List<VirtualMachineDescriptor> listJavaProcesses() { |
| 129 | // ensure that process status helper is loaded (psapi.dll) |
| 130 | if (!isProcessStatusHelperInitialized) { |
| 131 | synchronized (WindowsAttachProvider.class) { |
| 132 | if (!isProcessStatusHelperInitialized) { |
| 133 | initializeProcessStatusHelper(); |
| 134 | isProcessStatusHelperInitialized = true; |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | ArrayList<VirtualMachineDescriptor> list = |
| 140 | new ArrayList<VirtualMachineDescriptor>(); |
| 141 | |
| 142 | // Use localhost in the display name |
| 143 | String host = "localhost"; |
| 144 | try { |
| 145 | host = InetAddress.getLocalHost().getHostName(); |
| 146 | } catch (UnknownHostException uhe) { |
| 147 | // ignore |
| 148 | } |
| 149 | |
| 150 | // Enumerate all processes. |
| 151 | // For those processes that have loaded a library named "jvm.dll" |
| 152 | // then we attempt to attach. If we succeed then we have a 6.0+ VM. |
| 153 | int processes[] = new int[1024]; |
| 154 | int count = enumProcesses(processes, processes.length); |
| 155 | for (int i=0; i<count; i++) { |
| 156 | if (isLibraryLoadedByProcess("jvm.dll", processes[i])) { |
| 157 | String pid = Integer.toString(processes[i]); |
| 158 | try { |
| 159 | new WindowsVirtualMachine(this, pid).detach(); |
| 160 | |
| 161 | // FIXME - for now we don't have an appropriate display |
| 162 | // name so we use pid@hostname |
| 163 | String name = pid + "@" + host; |
| 164 | |
| 165 | list.add(new HotSpotVirtualMachineDescriptor(this, pid, name)); |
| 166 | } catch (AttachNotSupportedException x) { |
| 167 | } catch (IOException ioe) { |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | return list; |
| 173 | } |
| 174 | |
| 175 | // indicates if psapi.dll has been initialized |
| 176 | private static volatile boolean isProcessStatusHelperInitialized; |
| 177 | |
| 178 | // loads psapi |
| 179 | private static native void initializeProcessStatusHelper(); |
| 180 | |
| 181 | // enumerates processes using psapi's EnumProcesses |
| 182 | private static native int enumProcesses(int[] processes, int max); |
| 183 | |
| 184 | // indicates if a library of a given name has been loaded by a process |
| 185 | private static native boolean isLibraryLoadedByProcess(String library, |
| 186 | int processId); |
| 187 | |
| 188 | |
| 189 | // native functions in this library |
| 190 | static { |
| 191 | System.loadLibrary("attach"); |
| 192 | } |
| 193 | |
| 194 | } |