| /* VirtualMachineCommandSet.java -- class to implement the VirtualMachine |
| Command Set |
| Copyright (C) 2005, 2006, 2007 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.classpath.jdwp.processor; |
| |
| import gnu.classpath.jdwp.JdwpConstants; |
| import gnu.classpath.jdwp.VMFrame; |
| import gnu.classpath.jdwp.VMVirtualMachine; |
| import gnu.classpath.jdwp.exception.JdwpException; |
| import gnu.classpath.jdwp.exception.JdwpInternalErrorException; |
| import gnu.classpath.jdwp.exception.NotImplementedException; |
| import gnu.classpath.jdwp.id.ObjectId; |
| import gnu.classpath.jdwp.id.ReferenceTypeId; |
| import gnu.classpath.jdwp.util.JdwpString; |
| import gnu.classpath.jdwp.util.Signature; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Properties; |
| |
| /** |
| * A class representing the VirtualMachine Command Set. |
| * |
| * @author Aaron Luchko <aluchko@redhat.com> |
| */ |
| public class VirtualMachineCommandSet |
| extends CommandSet |
| { |
| public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) |
| throws JdwpException |
| { |
| boolean shutdown = false; |
| try |
| { |
| switch (command) |
| { |
| case JdwpConstants.CommandSet.VirtualMachine.VERSION: |
| executeVersion(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.CLASSES_BY_SIGNATURE: |
| executeClassesBySignature(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.ALL_CLASSES: |
| executeAllClasses(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.ALL_THREADS: |
| executeAllThreads(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.TOP_LEVEL_THREAD_GROUPS: |
| executeTopLevelThreadGroups(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.IDSIZES: |
| executeIDsizes(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.DISPOSE: |
| shutdown = true; |
| executeDispose(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.SUSPEND: |
| executeSuspend(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.RESUME: |
| executeResume(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.EXIT: |
| shutdown = true; |
| executeExit(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.CREATE_STRING: |
| executeCreateString(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.CAPABILITIES: |
| executeCapabilities(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.CLASS_PATHS: |
| executeClassPaths(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.DISPOSE_OBJECTS: |
| executeDisposeObjects(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.HOLD_EVENTS: |
| executeHoldEvents(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.RELEASE_EVENTS: |
| executeReleaseEvents(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.CAPABILITIES_NEW: |
| executeCapabilitiesNew(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.REDEFINE_CLASSES: |
| executeRedefineClasses(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.SET_DEFAULT_STRATUM: |
| executeSetDefaultStratum(bb, os); |
| break; |
| case JdwpConstants.CommandSet.VirtualMachine.ALL_CLASSES_WITH_GENERIC: |
| executeAllClassesWithGeneric(bb, os); |
| break; |
| default: |
| throw new NotImplementedException("Command " + command + |
| " not found in VirtualMachine Command Set."); |
| } |
| } |
| catch (IOException ex) |
| { |
| // The DataOutputStream we're using isn't talking to a socket at all |
| // So if we throw an IOException we're in serious trouble |
| throw new JdwpInternalErrorException(ex); |
| } |
| |
| return shutdown; |
| } |
| |
| private void executeVersion(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| |
| Properties props = System.getProperties(); |
| |
| int jdwpMajor = JdwpConstants.Version.MAJOR; |
| int jdwpMinor = JdwpConstants.Version.MINOR; |
| // The description field is pretty loosely defined |
| String description = "JDWP version " + jdwpMajor + "." + jdwpMinor |
| + ", JVM version " + props.getProperty("java.vm.name") |
| + " " + props.getProperty("java.vm.version") + " " |
| + props.getProperty("java.version"); |
| String vmVersion = props.getProperty("java.version"); |
| String vmName = props.getProperty("java.vm.name"); |
| JdwpString.writeString(os, description); |
| os.writeInt(jdwpMajor); |
| os.writeInt(jdwpMinor); |
| JdwpString.writeString(os, vmName); |
| JdwpString.writeString(os, vmVersion); |
| } |
| |
| private void executeClassesBySignature(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| String sig = JdwpString.readString(bb); |
| ArrayList allMatchingClasses = new ArrayList(); |
| |
| // This will be an Iterator over all loaded Classes |
| Collection classes = VMVirtualMachine.getAllLoadedClasses(); |
| Iterator iter = classes.iterator (); |
| |
| while (iter.hasNext()) |
| { |
| Class clazz = (Class) iter.next(); |
| String clazzSig = Signature.computeClassSignature(clazz); |
| if (clazzSig.equals(sig)) |
| allMatchingClasses.add(clazz); |
| } |
| |
| os.writeInt(allMatchingClasses.size()); |
| for (int i = 0; i < allMatchingClasses.size(); i++) |
| { |
| Class clazz = (Class) allMatchingClasses.get(i); |
| ReferenceTypeId id = idMan.getReferenceTypeId(clazz); |
| id.writeTagged(os); |
| int status = VMVirtualMachine.getClassStatus(clazz); |
| os.writeInt(status); |
| } |
| } |
| |
| private void executeAllClasses(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| Collection classes = VMVirtualMachine.getAllLoadedClasses(); |
| os.writeInt(classes.size ()); |
| |
| Iterator iter = classes.iterator (); |
| while (iter.hasNext()) |
| { |
| Class clazz = (Class) iter.next(); |
| ReferenceTypeId id = idMan.getReferenceTypeId(clazz); |
| id.writeTagged(os); |
| String sig = Signature.computeClassSignature(clazz); |
| JdwpString.writeString(os, sig); |
| int status = VMVirtualMachine.getClassStatus(clazz); |
| os.writeInt(status); |
| } |
| } |
| |
| private void executeAllThreads(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup(); |
| ThreadGroup root = getRootThreadGroup(jdwpGroup); |
| |
| int numThreads = root.activeCount(); |
| Thread allThreads[] = new Thread[numThreads]; |
| root.enumerate(allThreads); |
| |
| // We need to loop through for the true count since some threads may have |
| // been destroyed since we got |
| // activeCount so those spots in the array will be null. As well we must |
| // ignore any threads that belong to jdwp |
| numThreads = 0; |
| for (int i = 0; i < allThreads.length; i++) |
| { |
| Thread thread = allThreads[i]; |
| if (thread == null) |
| break; // No threads after this point |
| if (!thread.getThreadGroup().equals(jdwpGroup)) |
| numThreads++; |
| } |
| |
| os.writeInt(numThreads); |
| |
| for (int i = 0; i < allThreads.length; i++) |
| { |
| Thread thread = allThreads[i]; |
| if (thread == null) |
| break; // No threads after this point |
| if (!thread.getThreadGroup().equals(jdwpGroup)) |
| idMan.getObjectId(thread).write(os); |
| } |
| } |
| |
| private void executeTopLevelThreadGroups(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup (); |
| ThreadGroup root = getRootThreadGroup(jdwpGroup); |
| |
| os.writeInt(1); // Just one top level group allowed? |
| idMan.getObjectId(root); |
| } |
| |
| private void executeDispose(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| // resumeAllThreads isn't sufficient as a thread may have been |
| // suspended multiple times, we likely need a way to keep track of how many |
| // times a thread has been suspended or else a stronger resume method for |
| // this purpose |
| // VMVirtualMachine.resumeAllThreads (); |
| |
| // Simply shutting down the jdwp layer will take care of the rest of the |
| // shutdown other than disabling debugging in the VM |
| // VMVirtualMachine.disableDebugging(); |
| |
| // Don't implement this until we're sure how to remove all the debugging |
| // effects from the VM. |
| throw new NotImplementedException( |
| "Command VirtualMachine.Dispose not implemented"); |
| |
| } |
| |
| private void executeIDsizes(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| os.writeInt(ObjectId.SIZE); // fieldId FIXME |
| os.writeInt(ObjectId.SIZE); // methodId FIXME |
| os.writeInt(ObjectId.SIZE); // objectId |
| os.writeInt(ReferenceTypeId.SIZE); // referenceTypeId |
| os.writeInt(VMFrame.SIZE); // frameId |
| } |
| |
| private void executeSuspend(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| VMVirtualMachine.suspendAllThreads (); |
| } |
| |
| private void executeResume(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| VMVirtualMachine.resumeAllThreads (); |
| } |
| |
| private void executeExit(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| int exitCode = bb.getInt(); |
| System.exit (exitCode); |
| } |
| |
| private void executeCreateString(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| String string = JdwpString.readString(bb); |
| ObjectId stringId = idMan.getObjectId(string); |
| |
| // Since this string isn't referenced anywhere we'll disable garbage |
| // collection on it so it's still around when the debugger gets back to it. |
| stringId.disableCollection(); |
| stringId.write(os); |
| } |
| |
| private void executeCapabilities(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| os.writeBoolean(VMVirtualMachine.canWatchFieldModification); |
| os.writeBoolean(VMVirtualMachine.canWatchFieldAccess); |
| os.writeBoolean(VMVirtualMachine.canGetBytecodes); |
| os.writeBoolean(VMVirtualMachine.canGetSyntheticAttribute); |
| os.writeBoolean(VMVirtualMachine.canGetOwnedMonitorInfo); |
| os.writeBoolean(VMVirtualMachine.canGetCurrentContendedMonitor); |
| os.writeBoolean(VMVirtualMachine.canGetMonitorInfo); |
| } |
| |
| private void executeClassPaths(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| String baseDir = System.getProperty("user.dir"); |
| JdwpString.writeString(os, baseDir); |
| |
| // Find and write the classpath |
| String classPath = System.getProperty("java.class.path"); |
| String[] paths = classPath.split(":"); |
| |
| os.writeInt(paths.length); |
| for (int i = 0; i < paths.length; i++) |
| JdwpString.writeString(os, paths[i]); |
| |
| // Now the bootpath |
| String bootPath = System.getProperty("sun.boot.class.path"); |
| paths = bootPath.split(":"); |
| os.writeInt(paths.length); |
| for (int i = 0; i < paths.length; i++) |
| JdwpString.writeString(os, paths[i]); |
| } |
| |
| private void executeDisposeObjects(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| // Instead of going through the list of objects they give us it's probably |
| // better just to find the garbage collected objects ourselves |
| //idMan.update(); |
| } |
| |
| private void executeHoldEvents(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| // Going to have to implement a send queue somewhere and do this without |
| // triggering events |
| // Until then just don't implement |
| throw new NotImplementedException( |
| "Command VirtualMachine.HoldEvents not implemented"); |
| } |
| |
| // Opposite of executeHoldEvents |
| private void executeReleaseEvents(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| throw new NotImplementedException( |
| "Command VirtualMachine.ReleaseEvents not implemented"); |
| } |
| |
| private void executeCapabilitiesNew(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| final int CAPABILITIES_NEW_SIZE = 32; |
| |
| executeCapabilities(bb, os); |
| os.writeBoolean(VMVirtualMachine.canRedefineClasses); |
| os.writeBoolean(VMVirtualMachine.canAddMethod); |
| os.writeBoolean(VMVirtualMachine.canUnrestrictedlyRedefineClasses); |
| os.writeBoolean(VMVirtualMachine.canPopFrames); |
| os.writeBoolean(VMVirtualMachine.canUseInstanceFilters); |
| os.writeBoolean(VMVirtualMachine.canGetSourceDebugExtension); |
| os.writeBoolean(VMVirtualMachine.canRequestVMDeathEvent); |
| os.writeBoolean(VMVirtualMachine.canSetDefaultStratum); |
| for (int i = 15; i < CAPABILITIES_NEW_SIZE; i++) |
| { |
| // Future capabilities (currently unused) |
| os.writeBoolean(false); |
| } |
| } |
| |
| private void executeRedefineClasses(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| if (!VMVirtualMachine.canRedefineClasses) |
| { |
| String msg = "redefinition of classes is not supported"; |
| throw new NotImplementedException(msg); |
| } |
| |
| int classes = bb.getInt(); |
| Class[] types = new Class[classes]; |
| byte[][] bytecodes = new byte[classes][]; |
| for (int i = 0; i < classes; ++i) |
| { |
| ReferenceTypeId id = idMan.readReferenceTypeId(bb); |
| int classfile = bb.getInt(); |
| byte[] bytecode = new byte[classfile]; |
| bb.get(bytecode); |
| types[i] = id.getType(); |
| bytecodes[i] = bytecode; |
| } |
| |
| VMVirtualMachine.redefineClasses (types, bytecodes); |
| } |
| |
| private void executeSetDefaultStratum(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| if (!VMVirtualMachine.canSetDefaultStratum) |
| { |
| String msg = "setting the default stratum is not supported"; |
| throw new NotImplementedException(msg); |
| } |
| |
| String stratum = JdwpString.readString(bb); |
| VMVirtualMachine.setDefaultStratum(stratum); |
| } |
| |
| private void executeAllClassesWithGeneric(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| // We don't handle generics |
| throw new NotImplementedException( |
| "Command VirtualMachine.AllClassesWithGeneric not implemented"); |
| } |
| |
| /** |
| * Find the root ThreadGroup of this ThreadGroup |
| */ |
| private ThreadGroup getRootThreadGroup(ThreadGroup group) |
| { |
| ThreadGroup parent = group.getParent(); |
| |
| while (parent != null) |
| { |
| group = parent; |
| parent = group.getParent(); |
| } |
| return group; // This group was the root |
| } |
| } |
