--- /dev/null
+/* VirtualMachineCommandSet.java -- class to implement the VirtualMachine
+ Command Set
+ Copyright (C) 2005 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.IVirtualMachine;
+import gnu.classpath.jdwp.Jdwp;
+import gnu.classpath.jdwp.JdwpConstants;
+import gnu.classpath.jdwp.exception.JdwpException;
+import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
+import gnu.classpath.jdwp.exception.NotImplementedException;
+import gnu.classpath.jdwp.id.IdManager;
+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.Iterator;
+import java.util.Properties;
+
+/**
+ * A class representing the VirtualMachine Command Set.
+ *
+ * @author Aaron Luchko <aluchko@redhat.com>
+ */
+public class VirtualMachineCommandSet implements CommandSet
+{
+ // Our hook into the jvm
+ private final IVirtualMachine vm = Jdwp.getIVirtualMachine();
+
+ // Manages all the different ids that are assigned by jdwp
+ private final IdManager idMan = Jdwp.getIdManager();
+
+ // The Jdwp object
+ private final Jdwp jdwp = Jdwp.getDefault();
+
+ public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
+ throws JdwpException
+ {
+ boolean keepRunning = true;
+ 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:
+ keepRunning = false;
+ 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:
+ keepRunning = false;
+ 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:
+ break;
+ }
+ }
+ 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 keepRunning;
+ }
+
+ 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.write(jdwpMajor);
+ os.write(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
+ Iterator iter = vm.getAllLoadedClasses();
+
+ 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 = vm.getStatus(clazz);
+ os.writeInt(status);
+ }
+ }
+
+ private void executeAllClasses(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException, IOException
+ {
+ // Disable garbage collection while we're collecting the info on loaded
+ // classes so we some classes don't get collected between the time we get
+ // the count and the time we get the list
+ vm.disableGarbageCollection();
+
+ int classCount = vm.getAllLoadedClassesCount();
+ os.writeInt(classCount);
+
+ // This will be an Iterator over all loaded Classes
+ Iterator iter = vm.getAllLoadedClasses();
+ vm.enableGarbageCollection();
+ int count = 0;
+
+ // Note it's possible classes were created since out classCount so make
+ // sure we don't write more classes than we told the debugger
+ while (iter.hasNext() && count++ < classCount)
+ {
+ Class clazz = (Class) iter.next();
+ ReferenceTypeId id = idMan.getReferenceTypeId(clazz);
+ id.writeTagged(os);
+ String sig = Signature.computeClassSignature(clazz);
+ JdwpString.writeString(os, sig);
+ int status = vm.getStatus(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, true);
+
+ // 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.getId(thread).write(os);
+ }
+ }
+
+ private void executeTopLevelThreadGroups(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException, IOException
+ {
+ ThreadGroup jdwpGroup = jdwp.getJdwpThreadGroup();
+ ThreadGroup root = getRootThreadGroup(jdwpGroup);
+
+ os.writeInt(1); // Just one top level group allowed?
+ idMan.getId(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
+ // vm.resumeAllThreadsExcept(jdwp.getJdwpThreadGroup());
+
+ // Simply shutting down the jdwp layer will take care of the rest of the
+ // shutdown other than disabling debugging in the VM
+ // vm.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
+ {
+ ObjectId oid = new ObjectId();
+ os.writeInt(oid.size()); // fieldId
+ os.writeInt(oid.size()); // methodId
+ os.writeInt(oid.size()); // objectId
+ os.writeInt(new ReferenceTypeId((byte) 0x00).size()); // referenceTypeId
+ os.writeInt(oid.size()); // frameId
+ }
+
+ private void executeSuspend(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException
+ {
+ vm.suspendAllThreadsExcept(jdwp.getJdwpThreadGroup());
+ }
+
+ private void executeResume(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException
+ {
+ vm.resumeAllThreadsExcept(jdwp.getJdwpThreadGroup());
+ }
+
+ private void executeExit(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException, IOException
+ {
+ int exitCode = bb.getInt();
+ jdwp.setExit(exitCode);
+ }
+
+ private void executeCreateString(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException, IOException
+ {
+ String string = JdwpString.readString(bb);
+ ObjectId stringId = Jdwp.getIdManager().getId(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
+ {
+ // Store these somewhere?
+ os.writeBoolean(false); // canWatchFieldModification
+ os.writeBoolean(false); // canWatchFieldAccess
+ os.writeBoolean(false); // canGetBytecodes
+ os.writeBoolean(false); // canGetSyntheticAttribute
+ os.writeBoolean(false); // canGetOwnedMonitorInfo
+ os.writeBoolean(false); // canGetCurrentContendedMonitor
+ os.writeBoolean(false); // 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
+ {
+ // Store these somewhere?
+ final int CAPABILITIES_NEW_SIZE = 32;
+ os.writeBoolean(false); // canWatchFieldModification
+ os.writeBoolean(false); // canWatchFieldAccess
+ os.writeBoolean(false); // canGetBytecodes
+ os.writeBoolean(false); // canGetSyntheticAttribute
+ os.writeBoolean(false); // canGetOwnedMonitorInfo
+ os.writeBoolean(false); // canGetCurrentContendedMonitor
+ os.writeBoolean(false); // canGetMonitorInfo
+ os.writeBoolean(false); // canRedefineClasses
+ os.writeBoolean(false); // canAddMethod
+ os.writeBoolean(false); // canUnrestrictedlyRedefineClasses
+ os.writeBoolean(false); // canPopFrames
+ os.writeBoolean(false); // canUseInstanceFilters
+ os.writeBoolean(false); // canGetSourceDebugExtension
+ os.writeBoolean(false); // canRequestVMDeathEvent
+ os.writeBoolean(false); // canSetDefaultStratum
+ for (int i = 15; i < CAPABILITIES_NEW_SIZE; i++)
+ // Future capabilities
+ // currently unused
+ os.writeBoolean(false); // Set to false
+ }
+
+ private void executeRedefineClasses(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException
+ {
+ // Optional command, don't implement
+ throw new NotImplementedException(
+ "Command VirtualMachine.RedefineClasses not implemented");
+ }
+
+ private void executeSetDefaultStratum(ByteBuffer bb, DataOutputStream os)
+ throws JdwpException
+ {
+ // Optional command, don't implement
+ throw new NotImplementedException(
+ "Command VirtualMachine.SetDefaultStratum not implemented");
+ }
+
+ 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
+ }
+}
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