obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

58 files changed, 11277 insertions, 0 deletions

diff --git a/libjava/classpath/vm/reference/.cvsignore b/libjava/classpath/vm/reference/.cvsignore
new file mode 100644
index 000000000..282522db0
--- /dev/null
+++ b/libjava/classpath/vm/reference/.cvsignore
@@ -0,0 +1,2 @@
+Makefile
+Makefile.in
diff --git a/libjava/classpath/vm/reference/Makefile.am b/libjava/classpath/vm/reference/Makefile.am
new file mode 100644
index 000000000..84b035044
--- /dev/null
+++ b/libjava/classpath/vm/reference/Makefile.am
@@ -0,0 +1,3 @@
+# used by automake to generate Makefile.in
+
+SUBDIRS = java gnu
diff --git a/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java b/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java
new file mode 100644
index 000000000..2214e7571
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java
@@ -0,0 +1,131 @@
+/* VMStackWalker.java -- Reference implementation of VM hooks for stack access
+   Copyright (C) 2005, 2006 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;
+
+/**
+ * This class provides access to the classes on the Java stack
+ * for reflection and security purposes.
+ *
+ * <p>
+ * This class is only available to privileged code (i.e., code loaded
+ * by the bootstrap loader).
+ *
+ * @author John Keiser
+ * @author Eric Blake <ebb9@email.byu.edu>
+ * @author Archie Cobbs
+ */
+public final class VMStackWalker
+{
+  /**
+   * Get a list of all the classes currently executing methods on the
+   * Java stack. <code>getClassContext()[0]</code> is the class associated
+   * with the currently executing method, i.e., the method that called
+   * <code>VMStackWalker.getClassContext()</code> (possibly through
+   * reflection). So you may need to pop off these stack frames from
+   * the top of the stack:
+   * <ul>
+   * <li><code>VMStackWalker.getClassContext()</code>
+   * <li><code>Method.invoke()</code>
+   * </ul>
+   *
+   * @return an array of the declaring classes of each stack frame
+   */
+  public static native Class[] getClassContext();
+
+  /**
+   * Get the class associated with the method invoking the method
+   * invoking this method, or <code>null</code> if the stack is not
+   * that deep (e.g., invoked via JNI invocation API). This method
+   * is an optimization for the expression <code>getClassContext()[1]</code>
+   * and should return the same result.
+   *
+   * <p>
+   * VM implementers are encouraged to provide a more efficient
+   * version of this method.
+   */
+  public static Class getCallingClass()
+  {
+    Class[] ctx = getClassContext();
+    if (ctx.length < 3)
+      return null;
+    return ctx[2];
+  }
+
+  /**
+   * Get the class loader associated with the Class returned by
+   * <code>getCallingClass()</code>, or <code>null</code> if no such class
+   * exists or it is the boot loader. This method is an optimization for the
+   * expression <code>VMStackWalker.getClassLoader(getClassContext()[1])</code>
+   * and should return the same result.
+   *
+   * <p>
+   * VM implementers are encouraged to provide a more efficient
+   * version of this method.
+   */
+  public static ClassLoader getCallingClassLoader()
+  {
+    Class[] ctx = getClassContext();
+    if (ctx.length < 3)
+      return null;
+    return getClassLoader(ctx[2]);
+  }
+
+  /**
+   * Retrieve the class's ClassLoader, or <code>null</code> if loaded
+   * by the bootstrap loader. I.e., this should return the same thing
+   * as {@link java.lang.VMClass#getClassLoader}. This duplicate version
+   * is here to work around access permissions.
+   */
+  public static native ClassLoader getClassLoader(Class cl);
+
+  /**
+   * Walk up the stack and return the first non-null class loader.
+   * If there aren't any non-null class loaders on the stack, return null.
+   */
+  public static ClassLoader firstNonNullClassLoader()
+  {
+    Class[] stack = getClassContext();
+    for (int i = 0; i < stack.length; i++)
+      {
+        ClassLoader loader = getClassLoader(stack[i]);
+        if (loader != null)
+          return loader;
+      }
+    return null;
+  }
+}
diff --git a/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java b/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java
new file mode 100644
index 000000000..1e0dd4e26
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java
@@ -0,0 +1,97 @@
+/* VMSystemProperties.java -- Allow the VM to set System properties.
+   Copyright (C) 2004 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;
+
+import java.util.Properties;
+
+class VMSystemProperties
+{
+    /**
+     * Get the system properties. This is done here, instead of in System,
+     * because of the bootstrap sequence. Note that the native code should
+     * not try to use the Java I/O classes yet, as they rely on the properties
+     * already existing. The only safe method to use to insert these default
+     * system properties is {@link Properties#setProperty(String, String)}.
+     *
+     * <p>These properties MUST include:
+     * <dl>
+     * <dt>java.version         <dd>Java version number
+     * <dt>java.vendor          <dd>Java vendor specific string
+     * <dt>java.vendor.url      <dd>Java vendor URL
+     * <dt>java.home            <dd>Java installation directory
+     * <dt>java.vm.specification.version <dd>VM Spec version
+     * <dt>java.vm.specification.vendor  <dd>VM Spec vendor
+     * <dt>java.vm.specification.name    <dd>VM Spec name
+     * <dt>java.vm.version      <dd>VM implementation version
+     * <dt>java.vm.vendor       <dd>VM implementation vendor
+     * <dt>java.vm.name         <dd>VM implementation name
+     * <dt>java.specification.version    <dd>Java Runtime Environment version
+     * <dt>java.specification.vendor     <dd>Java Runtime Environment vendor
+     * <dt>java.specification.name       <dd>Java Runtime Environment name
+     * <dt>java.class.version   <dd>Java class version number
+     * <dt>java.class.path      <dd>Java classpath
+     * <dt>java.library.path    <dd>Path for finding Java libraries
+     * <dt>java.io.tmpdir       <dd>Default temp file path
+     * <dt>java.compiler        <dd>Name of JIT to use
+     * <dt>java.ext.dirs        <dd>Java extension path
+     * <dt>os.name              <dd>Operating System Name
+     * <dt>os.arch              <dd>Operating System Architecture
+     * <dt>os.version           <dd>Operating System Version
+     * <dt>file.separator       <dd>File separator ("/" on Unix)
+     * <dt>path.separator       <dd>Path separator (":" on Unix)
+     * <dt>line.separator       <dd>Line separator ("\n" on Unix)
+     * <dt>user.name            <dd>User account name
+     * <dt>user.home            <dd>User home directory
+     * <dt>user.dir             <dd>User's current working directory
+     * <dt>gnu.cpu.endian       <dd>"big" or "little"
+     * </dl>
+     *
+     * @param properties the Properties object to insert the system properties into
+     */
+    static native void preInit(Properties properties);
+
+    /**
+     * Here you get a chance to overwrite some of the properties set by
+     * the common SystemProperties code. For example, it might be
+     * a good idea to process the properties specified on the command
+     * line here.
+     */
+    static void postInit(Properties properties)
+    {
+    }
+}
diff --git a/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMFrame.java b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMFrame.java
new file mode 100644
index 000000000..6419d3ee9
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMFrame.java
@@ -0,0 +1,135 @@
+/* VMFrame.java -- Reference implementation of VM hooks for JDWP Frame access.
+   Copyright (C) 2005, 2006 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
+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;
+
+import gnu.classpath.jdwp.util.Location;
+import gnu.classpath.jdwp.value.Value;
+
+/**
+ * Reference implementation of VM hooks for JDWP Frame access.
+ *
+ * @author aluchko
+ */
+
+public class VMFrame
+{
+  /**
+   * Returns the size of a frame ID over JDWP
+   */
+  public static final int SIZE = 8;
+
+  //The thread this frame resides in
+  private Thread thread;
+
+  // The object this frame resides in
+  private Object obj;
+
+  // The current location of this frame
+  private Location loc;
+
+  // id of this frame
+  private long id;
+
+  /**
+   * Create a new VMFrame object.
+   *
+   * @param thr a Thread, the thread this frame is in
+   * @param frame_id a long, the jframeID of this frame
+   * @param frame_loc a Location, the location of this frame
+   * @param frame_obj the "this" object of this frame
+   */
+  public VMFrame(Thread thr, long frame_id, Location frame_loc,
+                 Object frame_obj)
+  {
+    thread = thr;
+    id = frame_id;
+    loc = frame_loc;
+    obj = frame_obj;
+  }
+
+  /**
+   * Gets the current location of the frame.
+   */
+  public Location getLocation()
+  {
+    return loc;
+  }
+
+  /**
+   * Returns the value of the variable in the given slot.
+   *
+   * @param slot the slot containing the variable
+   */
+  public native Value getValue(int slot, byte sig);
+
+  /**
+   * Assigns the given variable to the given value.
+   * @param slot The slot which contains the variable
+   * @param value The value to assign the variable to
+   */
+  public native void setValue(int slot, Value value);
+
+  /**
+   * Get the thread this frame is in.
+   */
+  public Thread getThread()
+  {
+    return thread;
+  }
+
+  /**
+   * Get the object which is represented by 'this' in the context of the frame,
+   * returns null if the method is native or static.
+   */
+  public Object getObject()
+  {
+    return obj;
+  }
+
+  /**
+   * Get the frameID
+   * @return an id which is unique within the scope of the VM
+   */
+  public long getId()
+  {
+    return id;
+  }
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMIdManager.java b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMIdManager.java
new file mode 100644
index 000000000..ac3e05a7c
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMIdManager.java
@@ -0,0 +1,435 @@
+/* VMIdManager.java -- A reference/example implementation of a manager for
+   JDWP object/reference type IDs
+
+   Copyright (C) 2005, 2006 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
+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;
+
+import gnu.classpath.jdwp.exception.InvalidClassException;
+import gnu.classpath.jdwp.exception.InvalidObjectException;
+import gnu.classpath.jdwp.id.*;
+
+import java.lang.ref.Reference;
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.SoftReference;
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.Hashtable;
+
+/**
+ * This class manages objects and referencetypes that are reported
+ * to the debugger. All objects and referencetypes reported to the
+ * debugger should go through this manager.
+ *
+ * A brief summary of what an <code>IdManager</code> must provide:
+ *
+ * <code>
+ * public ObjectId getObjectId (Object theObject);
+ * public ObjectId get (long id);
+ * public ObjectId readObjectId (ByteBuffer bb);
+ * public ReferenceTypeId getReferenceTypeId (Class clazz);
+ * public ReferenceTypeId getReferenceType (long id);
+ * public ReferenceTypeId readReferenceTypeId (ByteBuffer bb);
+ * </code>
+ *
+ * See the javadoc on these methods later in this file for more
+ * information on these functions.
+ *
+ * <b>NOTE:</b> All IDs handled by the ID manager (all object and reference
+ * type IDs) are assumed to be of type <code>long</code>.
+ *
+ * <b>NOTE:</b> This class does not manage virtual machine-specific types,
+ * like methods, fields, and frames. These already have unique IDs within
+ * the virtual machine and do not need further abstraction here.
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class VMIdManager
+{
+  // This factory generates ids for objects and types that may
+  // be sent to a debugger.
+  private static class IdFactory
+  {
+    // ID of last object / referencetype
+    private static Object _idLock = new Object ();
+    private static Object _ridLock = new Object ();
+    private static long _lastId = 0;
+    private static long _lastRid = 0;
+
+    // A list of all ID types
+    private static HashMap _idList = new HashMap ();
+
+    // Initialize the id list with known types
+    static
+    {
+      // ObjectId and ArrayId are special cases. See newObjectId.
+      _idList.put (ClassLoaderId.typeClass, ClassLoaderId.class);
+      _idList.put (ClassObjectId.typeClass, ClassObjectId.class);
+      _idList.put (StringId.typeClass, StringId.class);
+      _idList.put (ThreadId.typeClass, ThreadId.class);
+      _idList.put (ThreadGroupId.typeClass, ThreadGroupId.class);
+    }
+
+    /**
+     * Returns a new id for the given object
+     *
+     * @param obj  SoftReference of the object for which an id is desired
+     * @returns a suitable object id
+     */
+    public static ObjectId newObjectId (SoftReference obj)
+    {
+      ObjectId id = null;
+      Object object = obj.get ();
+
+      // Special case: arrays
+      if (object.getClass ().isArray ())
+        id = new ArrayId ();
+      else
+        {
+          // Loop through all classes until we hit baseclass
+          Class myClass;
+          for (myClass = object.getClass (); myClass != null;
+               myClass = myClass.getSuperclass ())
+            {
+              Class clz = (Class) _idList.get (myClass);
+              if (clz != null)
+                {
+                  try
+                    {
+                      id = (ObjectId) clz.newInstance ();
+                      synchronized (_idLock)
+                        {
+                          id.setId (++_lastId);
+                        }
+                      id.setReference (obj);
+                      return id;
+                    }
+                  catch (InstantiationException ie)
+                    {
+                      // This really should not happen
+                      throw new RuntimeException ("cannot create new ID", ie);
+                    }
+                  catch (IllegalAccessException iae)
+                    {
+                      // This really should not happen
+                      throw new RuntimeException ("illegal access of ID", iae);
+                    }
+                }
+            }
+
+          /* getSuperclass returned null and no matching ID type found.
+             So it must derive from Object. */
+          id = new ObjectId ();
+        }
+
+      synchronized (_idLock)
+        {
+          id.setId (++_lastId);
+        }
+      id.setReference (obj);
+      return id;
+    }
+
+    /**
+     * Returns a new reference type id for the given class
+     *
+     * @param ref  SoftReference to the desired type
+     * @returns a suitable reference type id or null when the
+     * reference is cleared.
+     */
+    public static ReferenceTypeId newReferenceTypeId (SoftReference ref)
+    {
+      ReferenceTypeId id;
+      Class clazz = (Class) ref.get ();
+      if (clazz == null)
+        return null;
+
+      if (clazz.isArray ())
+        id = new ArrayReferenceTypeId ();
+      else if (clazz.isInterface ())
+        id = new InterfaceReferenceTypeId ();
+      else
+        id = new ClassReferenceTypeId ();
+      id.setReference (ref);
+      synchronized (_ridLock)
+        {
+          id.setId (++_lastRid);
+        }
+      return id;
+    }
+  }
+
+  /**
+   * This class is a SoftReferenceIdentity type that is used by
+   * the ID manager.
+   */
+  class ReferenceKey extends SoftReference
+  {
+    // Hash code of referent
+    private int _hash;
+
+    /**
+     * Constructs a new <code>ReferenceKey</code> object
+     * with the given referent.
+     *
+     * <p>This constructor should only be used for object lookups
+     * by the backend.
+     *
+     * @param referent  the object to reference
+     */
+    public ReferenceKey (Object referent)
+    {
+      super (referent);
+      _hash = referent.hashCode ();
+    }
+
+    /**
+     * Constructs a new <code>ReferenceKey</code> object
+     * with the given referent and reference queue.
+     *
+     * <p>The JDWP back-end stores a <code>ReferenceKey</code>
+     * with its corresponding <code>JdwpId</code>. This constructor
+     * is used by the back-end when adding new IDs to be managed.
+     *
+     * @param referent  the object to reference
+     * @param queue     the queue to which to report garbage collections
+     */
+    public ReferenceKey (Object referent, ReferenceQueue queue)
+    {
+      super (referent, queue);
+      _hash = referent.hashCode ();
+    }
+
+    /**
+     * Returns the hash code of the referent.
+     * This seems hacky, but is required in order to use this class
+     * as a hash table key.
+     *
+     * @returns the hash code of the referent
+     */
+    public int hashCode ()
+    {
+      return _hash;
+    }
+
+    /**
+     * Comparator for keys
+     *
+     * This method can be used in two ways:
+     *
+     * <ol>
+     *    <li>For table lookups, where we want to compare referents</li>
+     *    <li>For clearing GCd objects, where we want to compare the actual
+     *        key object (not the referent)</li>
+     * </ol>
+     */
+    public boolean equals (Object obj)
+    {
+      if (obj instanceof ReferenceKey)
+        {
+          ReferenceKey ref = (ReferenceKey) obj;
+
+          /* First check if the two references are the same.
+             If they are, that means we must be clearing GCd objects. */
+          if (this == obj)
+            return true;
+
+          return (ref.get () == get ());
+        }
+
+      return false;
+    }
+  }
+
+  // instance of VMIdManager
+  private static VMIdManager _idm = new VMIdManager ();
+
+  // A reference queue for our objects
+  private ReferenceQueue _refQueue;
+
+  // Mapping of objects (ReferenceKey) to IDs (ObjectId)
+  private Hashtable _oidTable;
+
+  // Mapping of ID numbers (Long) to IDs (ObjectId)
+  private Hashtable _idTable;
+
+  /* Mapping of class (ReferenceKey) to IDs (ReferenceTypeId) for reference
+     types. Unlike other types, reference id types are NEVER released. */
+  private Hashtable _classTable;
+
+  // Mapping of ID numbers (Long) to reference type IDs (ReferenceTypeId)
+  private Hashtable _ridTable;
+
+  /**
+   * Gets the instance of VMIdManager, constructing a new one
+   * if none currently exists.
+   */
+  public static VMIdManager getDefault ()
+  {
+    return _idm;
+  }
+
+  // Constructs a new <code>IdManager</code>
+  private VMIdManager ()
+  {
+    _refQueue = new ReferenceQueue ();
+    _oidTable = new Hashtable (50);
+    _idTable = new Hashtable (50);
+    _classTable = new Hashtable (20);
+    _ridTable = new Hashtable (20);
+  }
+
+  // Updates the object ID table, removing IDs whose objects have
+  // been garbage collected.
+  private void _update ()
+  {
+    Reference ref;
+    while ((ref = _refQueue.poll ()) != null)
+      {
+        ObjectId id = (ObjectId) _oidTable.get (ref);
+        _oidTable.remove (ref);
+        _idTable.remove (new Long (id.getId ()));
+      }
+  }
+
+  /**
+   * Returns an id for the given object, adding it
+   * if it does not have an id.
+   *
+   * @param theObject  the object to get an ID/add
+   * @returns  the ID of the object
+   */
+  public ObjectId getObjectId (Object theObject)
+  {
+    // Special case: null
+    if (theObject == null)
+      return new NullObjectId ();
+
+    ReferenceKey ref = new ReferenceKey (theObject, _refQueue);
+    ObjectId id = (ObjectId) _oidTable.get (ref);
+    if (id == null)
+      {
+        // update the tables -- this is an arbitrary place to put this
+        _update ();
+
+        // Object not found. Make new id for it
+        id = IdFactory.newObjectId (ref);
+        _oidTable.put (ref, id);
+        _idTable.put (new Long (id.getId ()), id);
+      }
+
+    return id;
+  }
+
+  /**
+   * Returns the <code>JdwpId</code> for a given ID. Unlike
+   * <code>getId</code>, it throws an exception if the ID is not
+   * known.
+   *
+   * @param id  the numerical ID of the desired <code>JdwpId</code>
+   * @throws InvalidObjectException if the ID is not found
+   */
+  public ObjectId get (long id)
+    throws InvalidObjectException
+  {
+    // Special case: null
+    if (id == 0)
+      return new NullObjectId ();
+
+    ObjectId oid = (ObjectId) _idTable.get (new Long (id));
+    if (oid == null)
+      throw new InvalidObjectException (id);
+
+    return oid;
+  }
+
+  public ObjectId readObjectId (ByteBuffer bb)
+    throws InvalidObjectException
+  {
+    long id = bb.getLong ();
+    return get (id);
+  }
+
+  /**
+   * Gets the reference type id for the given class, creating
+   * a new one if it does not already have an id
+   *
+   * @param clazz  the class for which to get an ID
+   * @returns  the ID of the class
+   */
+  public ReferenceTypeId getReferenceTypeId (Class clazz)
+  {
+    ReferenceKey ref = new ReferenceKey (clazz);
+    ReferenceTypeId id = (ReferenceTypeId)_classTable.get (ref);
+    if (id == null)
+      {
+        // Object not found. Make new id for it
+        id = IdFactory.newReferenceTypeId (ref);
+        _classTable.put (ref, id);
+        _ridTable.put (new Long (id.getId ()), id);
+      }
+
+    return id;
+  }
+
+  /**
+   * Returns the <code>ReferenceTypeId</code> for a given ID. Unlike
+   * <code>getReferenceTypeId</code>, it throws an exception if the ID is not
+   * known.
+   *
+   * @param id  the numerical ID of the desired reference type
+   * @throws InvalidClassException if the ID is not found
+   */
+  public ReferenceTypeId getReferenceType (long id)
+    throws InvalidClassException
+  {
+    ReferenceTypeId rid = (ReferenceTypeId) _ridTable.get (new Long (id));
+    if (rid == null)
+      throw new InvalidClassException (id);
+
+    return rid;
+  }
+
+  public ReferenceTypeId readReferenceTypeId (ByteBuffer bb)
+    throws InvalidClassException
+  {
+    long id = bb.getLong ();
+    return getReferenceType (id);
+  }
+}
diff --git a/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMMethod.java b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMMethod.java
new file mode 100644
index 000000000..8e15a48d1
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMMethod.java
@@ -0,0 +1,189 @@
+/* VMMethod.java -- a method in a virtual machine
+   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+
+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
+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;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import gnu.classpath.jdwp.exception.JdwpException;
+import gnu.classpath.jdwp.util.LineTable;
+import gnu.classpath.jdwp.util.VariableTable;
+
+/**
+ * This class is really an amalgamation of two classes: one class
+ * represents a virtual machine method and the other represents
+ * the JDWP back-end's ID for the method.
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class VMMethod
+{
+  /**
+   * Returns the size of a JDWP method ID
+   * @see gnu.classpath.jdwp.id.JdwpId#SIZE
+   */
+   public static final int SIZE = 8;
+
+  // The class in which this method is declared
+  private Class _class;
+
+  // The method's ID
+  private long _methodId;
+
+  /**
+   * Constructs a new VMMethod object. This constructor is protected
+   * so that only the factory methods of VMVirtualMachine can be used
+   * to create VMMethods.
+   *
+   * @param klass the method's containing class
+   * @param id    method identifier, e.g., jmethodID
+   * @see gnu.classpath.jdwp.VMVirtualMachine#getAllClassMethods
+   * @see gnu.classpath.jdwp.VMVirtualMachine#getClassMethod
+   */
+  protected VMMethod(Class klass, long id)
+  {
+    _class = klass;
+    _methodId = id;
+  }
+
+  /**
+   * Returns the internal method ID for this method
+   */
+  public long getId()
+  {
+    return _methodId;
+  }
+
+  /**
+   * Returns the method's declaring class
+   */
+  public Class getDeclaringClass()
+  {
+    return _class;
+  }
+
+  /**
+   * Returns the name of this method
+   */
+  public native String getName();
+
+  /**
+   * Returns the signature of this method
+   */
+  public native String getSignature();
+
+  /**
+   * Returns the method's modifier flags
+   */
+  public native int getModifiers();
+
+  /**
+   * "Returns line number information for the method, if present. The line
+   * table maps source line numbers to the initial code index of the line.
+   * The line table is ordered by code index (from lowest to highest). The
+   * line number information is constant unless a new class definition is
+   * installed using RedefineClasses."
+   *
+   * @return the line table
+   * @throws JdwpException
+   */
+  public native LineTable getLineTable()
+    throws JdwpException;
+
+  /**
+   * "Returns variable information for the method. The variable table
+   * includes arguments and locals declared within the method. For instance
+   * methods, the "this" reference is included in the table. Also, synthetic
+   * variables may be present."
+   *
+   * @return the variable table
+   * @throws JdwpException
+   */
+  public native VariableTable getVariableTable()
+    throws JdwpException;
+
+  /**
+   * Returns a string representation of this method (not
+   * required but nice for debugging).
+   */
+  public String toString()
+  {
+    return getDeclaringClass().getName() + "." + getName();
+  }
+
+  /**
+   * Writes the method's ID to the output stream
+   *
+   * @param ostream the output stream to which to write
+   * @throws IOException for any errors writing to the stream
+   * @see gnu.classpath.jdwp.id.JdwpId#write
+   */
+  public void writeId(DataOutputStream ostream)
+    throws IOException
+  {
+    ostream.writeLong(getId());
+  }
+
+  /**
+   * Returns a VMMethod from the ID in the byte buffer
+   *
+   * @param klass the method's declaring class
+   * @param bb    a ByteBuffer containing the method's ID
+   * @throws JdwpException for any errors creating the method
+   * @throws IOException for any errors reading from the buffer
+   */
+  public static VMMethod readId(Class klass, ByteBuffer bb)
+    throws JdwpException, IOException
+  {
+    return VMVirtualMachine.getClassMethod(klass, bb.getLong());
+  }
+
+  public boolean equals(Object obj)
+  {
+    if (obj instanceof VMMethod)
+      {
+        VMMethod m = (VMMethod) obj;
+        return (getId() == m.getId());
+      }
+
+    return false;
+  }
+}
diff --git a/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMVirtualMachine.java b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMVirtualMachine.java
new file mode 100644
index 000000000..1f85a4a18
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/classpath/jdwp/VMVirtualMachine.java
@@ -0,0 +1,425 @@
+/* VMVirtualMachine.java -- A reference implementation of a JDWP virtual
+   machine
+
+   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
+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;
+
+import gnu.classpath.jdwp.event.EventRequest;
+import gnu.classpath.jdwp.exception.InvalidMethodException;
+import gnu.classpath.jdwp.exception.JdwpException;
+import gnu.classpath.jdwp.util.MethodResult;
+import gnu.classpath.jdwp.util.MonitorInfo;
+import gnu.classpath.jdwp.value.Value;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/**
+ * A virtual machine according to JDWP.
+ *
+ * @author Keith Seitz  <keiths@redhat.com>
+ */
+public class VMVirtualMachine
+{
+  // VM Capabilities
+  public static final boolean canWatchFieldModification = false;
+  public static final boolean canWatchFieldAccess = false;
+  public static final boolean canGetBytecodes = false;
+  public static final boolean canGetSyntheticAttribute = false;
+  public static final boolean canGetOwnedMonitorInfo = false;
+  public static final boolean canGetCurrentContendedMonitor = false;
+  public static final boolean canGetMonitorInfo = false;
+  public static final boolean canRedefineClasses = false;
+  public static final boolean canAddMethod = false;
+  public static final boolean canUnrestrictedlyRedefineClasses = false;
+  public static final boolean canPopFrames = false;
+  public static final boolean canUseInstanceFilters = false;
+  public static final boolean canGetSourceDebugExtension = false;
+  public static final boolean canRequestVMDeathEvent = false;
+  public static final boolean canSetDefaultStratum = false;
+
+  /**
+   * Suspend a thread
+   *
+   * @param  thread  the thread to suspend
+   */
+  public static native void suspendThread(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Suspend all threads
+   */
+  public static void suspendAllThreads()
+    throws JdwpException
+  {
+    // Our JDWP thread group -- don't suspend any of those threads
+    Thread current = Thread.currentThread ();
+    ThreadGroup jdwpGroup = Jdwp.getDefault().getJdwpThreadGroup();
+
+    // Find the root ThreadGroup
+    ThreadGroup group = jdwpGroup;
+    ThreadGroup parent = group.getParent ();
+    while (parent != null)
+      {
+        group = parent;
+        parent = group.getParent ();
+      }
+
+    // Get all the threads in the system
+    int num = group.activeCount ();
+    Thread[] threads = new Thread[num];
+    group.enumerate (threads);
+
+    for (int i = 0; i < num; ++i)
+      {
+        Thread t = threads[i];
+        if (t != null)
+          {
+            if (t.getThreadGroup () == jdwpGroup || t == current)
+              {
+                // Don't suspend the current thread or any JDWP thread
+                continue;
+              }
+            else
+              suspendThread (t);
+          }
+      }
+
+    // Now suspend the current thread
+    if (current.getThreadGroup() != jdwpGroup)
+      suspendThread (current);
+  }
+
+  /**
+   * Resume a thread. A thread must be resumed as many times
+   * as it has been suspended.
+   *
+   * @param  thread  the thread to resume
+   */
+  public static native void resumeThread(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Resume all threads. This simply decrements the thread's
+   * suspend count. It can not be used to force the application
+   * to run.
+   */
+  public static void resumeAllThreads()
+    throws JdwpException
+  {
+    // Our JDWP thread group -- don't resume
+    Thread current = Thread.currentThread ();
+    ThreadGroup jdwpGroup = current.getThreadGroup ();
+
+    // Find the root ThreadGroup
+    ThreadGroup group = jdwpGroup;
+    ThreadGroup parent = group.getParent ();
+    while (parent != null)
+      {
+        group = parent;
+        parent = group.getParent ();
+      }
+
+    // Get all the threads in the system
+    int num = group.activeCount ();
+    Thread[] threads = new Thread[num];
+    group.enumerate (threads);
+
+    for (int i = 0; i < num; ++i)
+      {
+        Thread t = threads[i];
+        if (t != null)
+          {
+            if (t.getThreadGroup () == jdwpGroup || t == current)
+              {
+                // Don't resume the current thread or any JDWP thread
+                continue;
+              }
+            else
+              resumeThread (t);
+          }
+      }
+  }
+
+  /**
+   * Get the suspend count for a give thread
+   *
+   * @param  thread  the thread whose suspend count is desired
+   * @return the number of times the thread has been suspended
+   */
+  public static native int getSuspendCount(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Returns a Collection of all classes loaded in the VM
+   */
+  public static native Collection getAllLoadedClasses()
+    throws JdwpException;
+
+  /**
+   * Returns the status of the given class
+   *
+   * @param  clazz  the class whose status is desired
+   * @return a flag containing the class's status
+   * @see JdwpConstants.ClassStatus
+   */
+  public static native int getClassStatus(Class clazz)
+    throws JdwpException;
+
+  /**
+   * Returns all of the methods defined in the given class. This
+   * includes all methods, constructors, and class initializers.
+   *
+   * @param  klass  the class whose methods are desired
+   * @return an array of virtual machine methods
+   */
+  public static native VMMethod[] getAllClassMethods(Class klass)
+  { return null; }
+
+  /**
+   * A factory method for getting valid virtual machine methods
+   * which may be passed to/from the debugger.
+   *
+   * @param klass the class in which the method is defined
+   * @param id    the ID of the desired method
+   * @return the desired internal representation of the method
+   * @throws InvalidMethodException if the method is not defined
+   *           in the class
+   * @throws JdwpException for any other error
+   */
+  public static native VMMethod getClassMethod(Class klass, long id)
+  { return null; }
+
+  /**
+   * Returns the thread's call stack
+   *
+   * @param  thread  thread for which to get call stack
+   * @param  start   index of first frame to return
+   * @param  length  number of frames to return (-1 for all frames)
+   * @return a list of frames
+   */
+  public static native ArrayList getFrames(Thread thread, int start,
+                                            int length)
+    throws JdwpException;
+
+  /**
+   * Returns the frame for a given thread with the frame ID in
+   * the buffer
+   *
+   * I don't like this.
+   *
+   * @param  thread  the frame's thread
+   * @param  bb      buffer containing the frame's ID
+   * @return the desired frame
+   */
+  public static native VMFrame getFrame(Thread thread, long frameID)
+    throws JdwpException;
+
+  /**
+   * Returns the number of frames in the thread's stack
+   *
+   * @param  thread  the thread for which to get a frame count
+   * @return the number of frames in the thread's stack
+   */
+  public static native int getFrameCount(Thread thread)
+    throws JdwpException;
+
+
+  /**
+   * Returns the status of a thread
+   *
+   * @param  thread  the thread for which to get status
+   * @return integer status of the thread
+   * @see JdwpConstants.ThreadStatus
+   */
+  public static native int getThreadStatus(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Returns a list of all classes which this class loader has been
+   * requested to load
+   *
+   * @param  cl  the class loader
+   * @return a list of all visible classes
+   */
+  public static native ArrayList getLoadRequests(ClassLoader cl)
+    throws JdwpException;
+
+  /**
+   * Executes a method in the virtual machine. The thread must already
+   * be suspended by a previous event. When the method invocation is
+   * complete, the thread (or all threads if INVOKE_SINGLE_THREADED is
+   * not set in options) must be suspended before this method returns.
+   *
+   * @param  obj         instance in which to invoke method (null for static)
+   * @param  thread      the thread in which to invoke the method
+   * @param  clazz       the class in which the method is defined
+   * @param  method      the method to invoke
+   * @param  values      arguments to pass to method
+   * @param  options     invocation options
+   * @return a result object containing the results of the invocation
+   */
+  public static native MethodResult executeMethod (Object obj, Thread thread,
+                                            Class clazz, VMMethod method,
+                                            Value[] values,
+                                            int options)
+    throws JdwpException;
+
+  /**
+   * "Returns the name of source file in which a reference type was declared"
+   *
+   * @param  clazz  the class for which to return a source file
+   * @return a string containing the source file name; "no path information
+   *         for the file is included"
+   */
+  public static native String getSourceFile(Class clazz)
+    throws JdwpException;
+
+  /**
+   * Register a request from the debugger
+   *
+   * Virtual machines have two options. Either do nothing and allow
+   * the event manager to take care of the request (useful for broadcast-type
+   * events like class prepare/load/unload, thread start/end, etc.)
+   * or do some internal work to set up the event notification (useful for
+   * execution-related events like breakpoints, single-stepping, etc.).
+   */
+  public static native void registerEvent(EventRequest request)
+    throws JdwpException;
+
+  /**
+   * Unregisters the given request
+   *
+   * @param  request  the request to unregister
+   */
+  public static native void unregisterEvent(EventRequest request)
+    throws JdwpException;
+
+
+  /**
+   * Clear all events of the given kind
+   *
+   * @param  kind  the type of events to clear
+   */
+  public static native void clearEvents(byte kind)
+    throws JdwpException;
+
+  /**
+   * Redefines the given types. VM must support canRedefineClasses
+   * capability (may also require canAddMethod and/or
+   * canUnrestrictedlyRedefineClasses capabilities)
+   *
+   * @param types the classes to redefine
+   * @param bytecodes the new bytecode definitions for the classes
+   */
+  public static native void redefineClasses(Class[] types, byte[][] bytecodes)
+    throws JdwpException;
+
+  /**
+   * Sets the default stratum. VM must support the
+   * canSetDefaultStratum capability.
+   *
+   * @param stratum the new default stratum or empty string to
+   *        use the reference default
+   */
+  public static native void setDefaultStratum(String stratum)
+    throws JdwpException;
+
+  /**
+   * Returns the source debug extension. VM must support the
+   * canGetSourceDebugExtension capability.
+   *
+   * @param klass the class for which to return information
+   * @returns the source debug extension
+   */
+  public static native String getSourceDebugExtension(Class klass)
+    throws JdwpException;
+
+  /**
+   * Returns the bytecode for the given method. VM must support the
+   * canGetBytecodes capability.
+   *
+   * @param method the method for which to get bytecodes
+   * @returns the bytecodes
+   */
+  public static native byte[] getBytecodes(VMMethod method)
+    throws JdwpException;
+
+  /**
+   * Returns monitor information about an object. VM must support
+   * the canGetMonitorInformation capability.
+   *
+   * @param obj the object
+   * @returns monitor information (owner, entry count, waiters)
+   */
+  public static native MonitorInfo getMonitorInfo(Object obj)
+    throws JdwpException;
+
+  /**
+   * Returns a list of owned monitors. VM must support the
+   * canGetOwnedMonitorInfo capability.
+   *
+   * @param thread a thread
+   * @returns the list of monitors owned by this thread
+   */
+  public static native Object[] getOwnedMonitors(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Returns the current contended monitor for a thread. VM must
+   * support canGetCurrentContendedMonitor capability.
+   *
+   * @param thread the thread
+   * @returns the contended monitor
+   */
+  public static native Object getCurrentContendedMonitor(Thread thread)
+    throws JdwpException;
+
+  /**
+   * Pop all frames up to and including the given frame. VM must
+   * support canPopFrames capability. It is the responsibility
+   * of the VM to check if the thread is suspended. If it is not,
+   * the VM should throw ThreadNotSuspendedException.
+   *
+   * @param thread the thread
+   * @param frame the frame ID
+   */
+  public static native void popFrames(Thread thread, long frameId);
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/VMCPStringBuilder.java b/libjava/classpath/vm/reference/gnu/java/lang/VMCPStringBuilder.java
new file mode 100644
index 000000000..c3a3784f3
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/VMCPStringBuilder.java
@@ -0,0 +1,112 @@
+/* VMCPStringBuilder.java -- Growable strings without locking or copying
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+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.java.lang;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * This class provides VM support for CPStringBuilder
+ * by allowing the package-private constructor
+ * of java.lang.String to be invoked.  The default
+ * implementation uses reflection.  VMs may replace
+ * this class with a more efficient version.
+ */
+final class VMCPStringBuilder
+{
+
+  /**
+   * The package-private constructor for String objects without copying.
+   */
+  private static final Constructor cons;
+
+  static
+  {
+    try
+      {
+        cons = String.class.getDeclaredConstructor(new Class[] { char[].class,
+                                                                 Integer.TYPE,
+                                                                 Integer.TYPE,
+                                                                 Boolean.TYPE });
+        cons.setAccessible(true);
+      }
+    catch (NoSuchMethodException e)
+      {
+        throw (Error)
+          new InternalError("Could not get no-copy String constructor").initCause(e);
+      }
+  }
+
+  /**
+   * Convert this <code>StringBuilder</code> to a <code>String</code>. The
+   * String is composed of the characters currently in this StringBuilder. Note
+   * that the result is not a copy, so the builder will allocate a new array
+   * if a further write operation is attempted.
+   *
+   * @param value the buffered characters.
+   * @param startIndex the index at which to start taking characters from the buffer.
+   * @param count the number of characters used in the buffer.
+   * @return the characters in this StringBuilder
+   */
+  public static String toString(char[] value, int startIndex, int count)
+  {
+    try
+      {
+        return (String)
+          cons.newInstance(new Object[] { value, Integer.valueOf(startIndex),
+                                          Integer.valueOf(count),
+                                          Boolean.valueOf(true) });
+      }
+    catch (InstantiationException e)
+      {
+        throw (Error)
+          new InternalError("Could not instantiate no-copy String constructor").initCause(e);
+      }
+    catch (IllegalAccessException e)
+      {
+        throw (Error)
+          new InternalError("Could not access no-copy String constructor").initCause(e);
+      }
+    catch (InvocationTargetException e)
+      {
+        throw (Error)
+          new InternalError("Error calling no-copy String constructor").initCause(e);
+      }
+  }
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/VMInstrumentationImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/VMInstrumentationImpl.java
new file mode 100644
index 000000000..5501f0f7f
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/VMInstrumentationImpl.java
@@ -0,0 +1,108 @@
+/* VMInstrumentationImpl.java -- interface for the GNU implementation
+   of InstrumentationImpl
+   Copyright (C) 2005  Free Software Foundation, Inc.
+
+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.java.lang;
+
+import java.lang.instrument.ClassDefinition;
+import java.lang.instrument.Instrumentation;
+
+/**
+ * @author Nicolas Geoffray (nicolas.geoffray@menlina.com)
+ * @since 1.5
+ */
+final class VMInstrumentationImpl
+{
+
+  /**
+   * Returns if the current JVM supports class redefinition
+   *
+   * @return true if the current JVM supports class redefinition
+   */
+  static native boolean isRedefineClassesSupported();
+
+  /**
+   * Redefines classes given as parameters. The method has to call
+   * the callTransformers from InstrumentationImpl
+   *
+   * @param inst an instrumentation object
+   * @param definitions an array of bytecode<->class correspondance
+   *
+   * @throws ClassNotFoundException if a class cannot be found
+   * @throws UnmodifiableClassException if a class cannot be modified
+   * @throws UnsupportedOperationException if the JVM does not support
+   * redefinition or the redefinition made unsupported changes
+   * @throws ClassFormatError if a class file is not valid
+   * @throws NoClassDefFoundError if a class name is not equal to the name
+   * in the class file specified
+   * @throws UnsupportedClassVersionError if the class file version numbers
+   * are unsupported
+   * @throws ClassCircularityError if circularity occured with the new
+   * classes
+   * @throws LinkageError if a linkage error occurs
+   */
+  static native void redefineClasses(Instrumentation inst,
+      ClassDefinition[] definitions);
+
+  /**
+   * Get all the classes loaded by the JVM.
+   *
+   * @return an array containing all the classes loaded by the JVM. The array
+   * is empty if no class is loaded.
+   */
+  static native Class[] getAllLoadedClasses();
+
+  /**
+   * Get all the classes loaded by a given class loader
+   *
+   * @param loader the loader
+   *
+   * @return an array containing all the classes loaded by the given loader.
+   * The array is empty if no class was loaded by the loader.
+   */
+  static native Class[] getInitiatedClasses(ClassLoader loader);
+
+  /**
+   * Get the size of an object. The object is not null
+   *
+   * @param objectToSize the object
+   * @return the size of the object
+   */
+  static native long getObjectSize(Object objectToSize);
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMClassLoadingMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMClassLoadingMXBeanImpl.java
new file mode 100644
index 000000000..ea4989741
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMClassLoadingMXBeanImpl.java
@@ -0,0 +1,89 @@
+/* VMClassLoadingMXBeanImpl.java - VM impl. of a class loading bean
+   Copyright (C) 2006 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.java.lang.management;
+
+/**
+ * Provides access to information about the class loading
+ * behaviour of the current invocation of the virtual
+ * machine.  Instances of this bean are obtained by calling
+ * {@link ManagementFactory#getClassLoadingMXBean()}.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMClassLoadingMXBeanImpl
+{
+
+  /**
+   * Returns the number of classes currently loaded by
+   * the virtual machine.
+   *
+   * @return the number of loaded classes.
+   */
+  static native int getLoadedClassCount();
+
+  /**
+   * Returns the number of classes that have been unloaded
+   * by the virtual machine since it was started.
+   *
+   * @return the number of unloaded classes.
+   */
+  static native long getUnloadedClassCount();
+
+  /**
+   * Returns true if the virtual machine will emit additional
+   * information when classes are loaded and unloaded.  The
+   * format of the output is left up to the virtual machine.
+   *
+   * @return true if verbose class loading output is on.
+   */
+  static native boolean isVerbose();
+
+  /**
+   * Turns on or off the emission of additional information
+   * when classes are loaded and unloaded.  The format of the
+   * output is left up to the virtual machine.  This method
+   * may be called by multiple threads concurrently, but there
+   * is only one global setting of verbosity that is affected.
+   *
+   * @param verbose the new setting for verbose class loading
+   *                output.
+   */
+  static native void setVerbose(boolean verbose);
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMCompilationMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMCompilationMXBeanImpl.java
new file mode 100644
index 000000000..019af0ca4
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMCompilationMXBeanImpl.java
@@ -0,0 +1,66 @@
+/* VMCompilationMXBeanImpl.java - VM implementation of a compilation bean
+   Copyright (C) 2006 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.java.lang.management;
+
+/**
+ * Provides access to information about the JIT
+ * compiler of the virtual machine, if one exists.
+ * Instances of this bean are obtained by calling
+ * {@link ManagementFactory#getCompilationMXBean()},
+ * if this is the case.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMCompilationMXBeanImpl
+{
+
+  /**
+   * Returns the number of milliseconds the JIT
+   * compiler has spent compiling Java bytecode
+   * to native machine code.  This is only called
+   * if a JIT compiler exists and the
+   * gnu.java.lang.management.CompilationTimeSupport
+   * property has been set.
+   *
+   * @return the number of milliseconds spent
+   *         compiling.
+   */
+  static native long getTotalCompilationTime();
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMGarbageCollectorMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMGarbageCollectorMXBeanImpl.java
new file mode 100644
index 000000000..00861bc21
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMGarbageCollectorMXBeanImpl.java
@@ -0,0 +1,80 @@
+/* VMGarbageCollectorMXBeanImpl.java - VM interface for a GC bean
+   Copyright (C) 2006 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.java.lang.management;
+
+/**
+ * Provides access to information about the garbage collectors
+ * of the virtual machine.  Garbage collectors are responsible
+ * for removing unreferenced objects from memory.  A garbage
+ * collector is a type of memory manager, so this interface
+ * is combined with that of generic memory managers.  An instance
+ * of this bean for each garbage collector is obtained by calling
+ * {@link ManagementFactory#getGarbageCollectorMXBeans()}.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMGarbageCollectorMXBeanImpl
+{
+
+  /**
+   * Returns the number of collections the garbage collector
+   * represented by this bean has made.  -1 is returned if the
+   * collection count is undefined.
+   *
+   * @param name the name of the garbage collector.
+   * @return the number of collections made, or -1 if this is
+   *         undefined.
+   */
+  static native long getCollectionCount(String name);
+
+  /**
+   * Returns the accumulated number of milliseconds this garbage
+   * collector has spent freeing the memory used by unreferenced
+   * objects.  -1 is returned if the collection time is undefined.
+   * Note that the accumulated time may not change, even when the
+   * collection count increases, if the time taken is sufficiently
+   * short; this depends on the resolution of the timer used.
+   *
+   * @param name the name of the garbage collector.
+   * @return the accumulated number of milliseconds spent collecting,
+   *         or -1 if this is undefined.
+   */
+  static native long getCollectionTime(String name);
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryMXBeanImpl.java
new file mode 100644
index 000000000..7f69bdfb7
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryMXBeanImpl.java
@@ -0,0 +1,156 @@
+/* VMMemoryMXBeanImpl.java - VM impl. of a memory bean
+   Copyright (C) 2006 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.java.lang.management;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryPoolMXBean;
+import java.lang.management.MemoryType;
+import java.lang.management.MemoryUsage;
+
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Provides access to information about the memory
+ * management of the current invocation of the virtual
+ * machine.  Instances of this bean are obtained by calling
+ * {@link ManagementFactory#getMemoryMXBean()}.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMMemoryMXBeanImpl
+{
+
+  /**
+   * Returns an instance of {@link java.lang.management.MemoryUsage}
+   * with appropriate initial, used, committed and maximum values
+   * for the heap.  By default, this uses the methods of
+   * {@link java.lang.Runtime} to provide some of the values.
+   *
+   * @return an {@link java.lang.management.MemoryUsage} instance
+   *         for the heap.
+   */
+  static MemoryUsage getHeapMemoryUsage()
+  {
+    return getUsage(MemoryType.HEAP);
+  }
+
+  /**
+   * Returns an instance of {@link java.lang.management.MemoryUsage}
+   * with appropriate initial, used, committed and maximum values
+   * for non-heap memory.
+   *
+   * @return an {@link java.lang.management.MemoryUsage} instance
+   *         for non-heap memory.
+   */
+  static MemoryUsage getNonHeapMemoryUsage()
+  {
+    return getUsage(MemoryType.NON_HEAP);
+  }
+
+  /**
+   * Returns the number of objects ready to be garbage collected.
+   *
+   * @return the number of finalizable objects.
+   */
+  static native int getObjectPendingFinalizationCount();
+
+  /**
+   * Returns true if the virtual machine will emit additional
+   * information when memory is allocated and deallocated.  The
+   * format of the output is left up to the virtual machine.
+   *
+   * @return true if verbose memory usage output is on.
+   */
+  static native boolean isVerbose();
+
+  /**
+   * Turns on or off the emission of additional information
+   * when memory is allocated and deallocated.  The format of the
+   * output is left up to the virtual machine.  This method
+   * may be called by multiple threads concurrently, but there
+   * is only one global setting of verbosity that is affected.
+   *
+   * @param verbose the new setting for verbose memory usage
+   *                output.
+   */
+  static native void setVerbose(boolean verbose);
+
+  /**
+   * Totals the memory usage from all the pools that match
+   * the given type.
+   *
+   * @param type the type of memory pools to accumulate
+   *             (heap or non-heap).
+   * @return the memory usage overall.
+   */
+  private static MemoryUsage getUsage(MemoryType type) {
+    long init = 0, committed = 0, used = 0, max = 0;
+    Iterator pools =
+      ManagementFactory.getMemoryPoolMXBeans().iterator();
+    while (pools.hasNext())
+      {
+        MemoryPoolMXBean pool = (MemoryPoolMXBean) pools.next();
+        if (pool.getType() == type)
+          {
+            MemoryUsage usage = pool.getUsage();
+            if (init != -1)
+              {
+                long poolInit = usage.getInit();
+                if (poolInit == -1)
+                  init = -1;
+                else
+                  init += poolInit;
+              }
+            committed += usage.getCommitted();
+            used += usage.getUsed();
+            if (max != -1)
+              {
+                long poolMax = usage.getMax();
+                if (poolMax == -1)
+                  max = -1;
+                else
+                  max += poolMax;
+              }
+          }
+      }
+    return new MemoryUsage(init, used, committed, max);
+  }
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryManagerMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryManagerMXBeanImpl.java
new file mode 100644
index 000000000..477329f0a
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryManagerMXBeanImpl.java
@@ -0,0 +1,95 @@
+/* VMMemoryManagerMXBeanImpl.java - VM interface for a memory manager bean
+   Copyright (C) 2006 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.java.lang.management;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryPoolMXBean;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Provides access to information about the memory managers
+ * of the virtual machine.  An instance of this bean for each
+ * memory manager is obtained by calling
+ * {@link ManagementFactory#getMemoryManagerMXBeans()}.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMMemoryManagerMXBeanImpl
+{
+
+  /**
+   * Returns an array containing the names of the memory pools
+   * this memory manager manages.
+   *
+   * @param name the name of the memory manager.
+   * @return an array containing the name of each memory pool
+   *         this manager is responsible for.
+   */
+  static String[] getMemoryPoolNames(String name)
+  {
+    List managedPools = new ArrayList();
+    Iterator beans = ManagementFactory.getMemoryPoolMXBeans().iterator();
+    while (beans.hasNext())
+      {
+        MemoryPoolMXBean bean = (MemoryPoolMXBean) beans.next();
+        String[] managers = bean.getMemoryManagerNames();
+        for (int a = 0; a < managers.length; ++a)
+          if (managers[a].equals(name))
+            {
+              managedPools.add(bean.getName());
+              break;
+            }
+      }
+    return (String[]) managedPools.toArray(new String[managedPools.size()]);
+  }
+
+  /**
+   * Returns true if this memory manager is still valid.  A memory
+   * manager becomes invalid when it is removed by the virtual machine
+   * and no longer used.
+   *
+   * @param name the name of the memory manager.
+   * @return true if this memory manager is valid.
+   */
+  static native boolean isValid(String name);
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryPoolMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryPoolMXBeanImpl.java
new file mode 100644
index 000000000..36cd2586a
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMMemoryPoolMXBeanImpl.java
@@ -0,0 +1,195 @@
+/* MemoryPoolMXBeanImpl.java - VM interface for memory pool beans
+   Copyright (C) 2006 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.java.lang.management;
+
+import java.lang.management.MemoryUsage;
+
+/**
+ * Provides access to information on the memory resources or
+ * pools used by the current invocation of the virtual machine.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMMemoryPoolMXBeanImpl
+{
+
+  /**
+   * Returns memory usage statistics for the specified pool
+   * just after a best-effort attempt to free memory.  This
+   * is valid only for certain garbage collectors.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return a {@link java.lang.management.MemoryUsage} object
+   *         containing the statistics or <code>null</code>
+   *         if this pool does not support such statistics.
+   */
+  static native MemoryUsage getCollectionUsage(String name);
+
+  /**
+   * Returns the collection usage threshold for the specified pool.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
+   * is defined).  The value is initially zero.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return the collection usage threshold.
+   */
+  static native long getCollectionUsageThreshold(String name);
+
+  /**
+   * Returns the number of times the collection usage threshold
+   * has been met or exceeded by the specified pool.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
+   * is defined).
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return the collection usage threshold count.
+   */
+  static native long getCollectionUsageThresholdCount(String name);
+
+  /**
+   * Returns an array of names of memory managers which manage
+   * the specified pool.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return a list of memory managers for the pool.
+   */
+  static native String[] getMemoryManagerNames(String name);
+
+  /**
+   * Returns the peak usage level of the specified pool.
+   * This is only called if the pool is valid.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return a {@link java.lang.management.MemoryUsage} object
+   *         containing the statistics.
+   */
+  static native MemoryUsage getPeakUsage(String name);
+
+  /**
+   * Returns the type of memory used by the specified pool.
+   * The value must be either "HEAP" or "NON_HEAP".
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return the type of the given pool.
+   */
+  static native String getType(String name);
+
+  /**
+   * Returns the current usage level of the specified pool.
+   * This is only called if the pool is valid.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return a {@link java.lang.management.MemoryUsage} object
+   *         containing the statistics.
+   */
+  static native MemoryUsage getUsage(String name);
+
+  /**
+   * Returns the usage threshold for the specified pool.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.UsageThresholdSupport</code>,
+   * is defined).  The value is initially defined by the
+   * virtual machine.
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return the usage threshold.
+   */
+  static native long getUsageThreshold(String name);
+
+  /**
+   * Returns the number of times the usage threshold
+   * has been met or exceeded by the specified pool.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.UsageThresholdSupport</code>,
+   * is defined).
+   *
+   * @param name the name of the pool to obtain statistics on.
+   * @return the usage threshold count.
+   */
+  static native long getUsageThresholdCount(String name);
+
+  /**
+   * Returns true if the specified pool is still valid i.e.
+   * it is still in use by the virtual machine.
+   *
+   * @param name the name of the pool to check the validity of.
+   * @return true if the pool is valid.
+   */
+  static native boolean isValid(String name);
+
+  /**
+   * Resets the peak usage level to the current usage level for
+   * the specified pool.
+   *
+   * @param name the name of the pool to reset the peak usage of.
+   */
+  static native void resetPeakUsage(String name);
+
+  /**
+   * Sets the collection usage threshold for the specified
+   * pool to the supplied value.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
+   * is defined).
+   *
+   * @param name the name of the pool to set the threshold of.
+   * @param threshold the new threshold level.
+   */
+  static native void setCollectionUsageThreshold(String name, long threshold);
+
+  /**
+   * Sets the usage threshold for the specified pool to the supplied value.
+   * This is only called if this functionality is supported
+   * by the virtual machine (i.e. the appropriate property,
+   * <code>gnu.java.lang.management.UsageThresholdSupport</code>,
+   * is defined).
+   *
+   * @param name the name of the pool to set the threshold of.
+   * @param threshold the new threshold level.
+   */
+  static native void setUsageThreshold(String name, long threshold);
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMOperatingSystemMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMOperatingSystemMXBeanImpl.java
new file mode 100644
index 000000000..20b3f9ed2
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMOperatingSystemMXBeanImpl.java
@@ -0,0 +1,68 @@
+/* VMOperatingSystemMXBeanImpl.java - VM implementation of an OS bean
+   Copyright (C) 2006 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.java.lang.management;
+
+import gnu.classpath.Configuration;
+
+/**
+ * Provides access to information about the operating system.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.6
+ */
+final class VMOperatingSystemMXBeanImpl
+{
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javalangmanagement");
+      }
+  }
+
+  /**
+   * Returns the system load average from the last
+   * minute.
+   *
+   * @return the system load average from the last
+   *         minute.
+   */
+  static native double getSystemLoadAverage();
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMRuntimeMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMRuntimeMXBeanImpl.java
new file mode 100644
index 000000000..32a866046
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMRuntimeMXBeanImpl.java
@@ -0,0 +1,89 @@
+/* VMRuntimeMXBeanImpl.java - VM implementation of an runtime bean
+   Copyright (C) 2006 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.java.lang.management;
+
+import gnu.classpath.SystemProperties;
+
+/**
+ * Provides access to information about the virtual machine.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMRuntimeMXBeanImpl
+{
+
+  /**
+   * Returns the command-line arguments supplied
+   * to the virtual machine, excluding those supplied
+   * to <code>main()</code>.
+   *
+   * @return the command-line arguments.
+   */
+  static native String[] getInputArguments();
+
+  /**
+   * Returns a developer-chosen name for the virtual
+   * machine, which may differ over different running
+   * instances of the same virtual machine binary.
+   * For example, this may include the particular
+   * process identifier used by this instance or
+   * the host name of the machine on which it is
+   * running.  The intention is that this name refers
+   * to the precise entity that the other data supplied
+   * by the bean refers to, rather than the VM in general.
+   *
+   * @return the custom name of the VM.
+   */
+  static String getName()
+  {
+    return SystemProperties.getProperty("java.vm.name") + " " +
+      SystemProperties.getProperty("java.vm.version");
+  }
+
+  /**
+   * The time in milliseconds at which the virtual
+   * machine was started.  This method is only executed
+   * once (for efficency), as the value is not expected
+   * to change.
+   *
+   * @return the VM start time.
+   */
+  static native long getStartTime();
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/lang/management/VMThreadMXBeanImpl.java b/libjava/classpath/vm/reference/gnu/java/lang/management/VMThreadMXBeanImpl.java
new file mode 100644
index 000000000..33448d9d5
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/lang/management/VMThreadMXBeanImpl.java
@@ -0,0 +1,236 @@
+/* VMThreadMXBeanImpl.java - VM impl. of a thread bean
+   Copyright (C) 2006 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.java.lang.management;
+
+import java.lang.management.ThreadInfo;
+
+/**
+ * Provides access to information about the threads
+ * of the virtual machine.  An instance of this bean is
+ * obtained by calling
+ * {@link ManagementFactory#getThreadMXBean()}.
+ * See {@link java.lang.management.ThreadMXBean} for
+ * full documentation.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMThreadMXBeanImpl
+{
+
+  /**
+   * Cache of how many threads were found.
+   */
+  private static int filled;
+
+  /**
+   * Returns the ids of cycles of deadlocked threads, occurring
+   * due to monitor ownership or ownable synchronizer ownership.
+   * This will only be called if ownable synchronizer monitoring
+   * is supported.
+   *
+   * @return the ids of the deadlocked threads.
+   */
+  static native long[] findDeadlockedThreads();
+
+  /**
+   * Returns the ids of cycles of deadlocked threads, occurring
+   * due to monitor ownership.
+   *
+   * @return the ids of the deadlocked threads.
+   */
+  static native long[] findMonitorDeadlockedThreads();
+
+  /* This is the same as in Thread.getAllStackTraces() */
+  static Thread[] getAllThreads()
+  {
+    ThreadGroup group = Thread.currentThread().getThreadGroup();
+    while (group.getParent() != null)
+      group = group.getParent();
+    int arraySize = group.activeCount();
+    Thread[] threadList = new Thread[arraySize];
+    filled = group.enumerate(threadList);
+    while (filled == arraySize)
+      {
+        arraySize *= 2;
+        threadList = new Thread[arraySize];
+        filled = group.enumerate(threadList);
+      }
+    return threadList;
+  }
+
+  /**
+   * Returns the id of all live threads at the time of execution.
+   *
+   * @return the live thread ids.
+   */
+  static long[] getAllThreadIds()
+  {
+    Thread[] threadList = getAllThreads();
+    long[] ids = new long[filled];
+    for (int a = 0; a < filled; ++a)
+      ids[a] = threadList[a].getId();
+    return ids;
+  }
+
+  /**
+   * Returns the number of nanoseconds of CPU time
+   * the current thread has used in total.   This is
+   * only called if this feature is enabled and
+   * supported.
+   *
+   * @return the nanoseconds of CPU time used by
+   *         the current thread.
+   */
+  static native long getCurrentThreadCpuTime();
+
+  /**
+   * Returns the number of nanoseconds of user time
+   * the current thread has used in total.   This is
+   * only called if this feature is enabled and
+   * supported.
+   *
+   * @return the nanoseconds of user time used by
+   *         the current thread.
+   */
+  static native long getCurrentThreadUserTime();
+
+  /**
+   * Returns the number of live daemon threads.
+   *
+   * @return the number of live daemon threads.
+   */
+  static int getDaemonThreadCount()
+  {
+    Thread[] threadList = getAllThreads();
+    int daemonCount = 0;
+    for (int a = 0; a < filled; ++a)
+      {
+        if (threadList[a].isDaemon())
+          ++daemonCount;
+      }
+    return daemonCount;
+  }
+
+  /**
+   * Fill out the given {@link ThreadInfo} object
+   * with ownable synchronizer usage information.
+   * This is only called if ownable synchronizer
+   * usage monitoring is supported.
+   *
+   * @param info the {@link ThreadInfo} object to modify.
+   */
+  static native void getLockInfo(ThreadInfo info);
+
+  /**
+   * Fill out the given {@link ThreadInfo} object
+   * with monitor usage information.  This is only
+   * called if monitor usage monitoring is supported.
+   *
+   * @param info the {@link ThreadInfo} object to modify.
+   */
+  static native void getMonitorInfo(ThreadInfo info);
+
+  /**
+   * Returns the current peak number of live threads.
+   *
+   * @return the peak number of live threads.
+   */
+  static native int getPeakThreadCount();
+
+  /**
+   * Returns the number of live threads.
+   *
+   * @return the number of live threads.
+   */
+  static int getThreadCount()
+  {
+    getAllThreads();
+    return filled;
+  }
+
+  /**
+   * Returns the number of nanoseconds of CPU time
+   * the specified thread has used in total.   This is
+   * only called if this feature is enabled and
+   * supported.
+   *
+   * @param id the thread to obtain statistics on.
+   * @return the nanoseconds of CPU time used by
+   *         the thread.
+   */
+  static native long getThreadCpuTime(long id);
+
+  /**
+   * Returns the {@link java.lang.management.ThreadInfo}
+   * which corresponds to the specified id.
+   *
+   * @param id the id of the thread.
+   * @param maxDepth the depth of the stack trace.
+   * @return the corresponding <code>ThreadInfo</code>.
+   */
+  static native ThreadInfo getThreadInfoForId(long id, int maxDepth);
+
+  /**
+   * Returns the number of nanoseconds of user time
+   * the specified thread has used in total.   This is
+   * only called if this feature is enabled and
+   * supported.
+   *
+   * @param id the thread to obtain statistics on.
+   * @return the nanoseconds of user time used by
+   *         the thread.
+   */
+  static native long getThreadUserTime(long id);
+
+  /**
+   * Returns the total number of threads that have
+   * been started over the lifetime of the virtual
+   * machine.
+   *
+   * @return the total number of threads started.
+   */
+  static native long getTotalStartedThreadCount();
+
+  /**
+   * Resets the peak thread count to the current
+   * number of live threads.
+   */
+  static native void resetPeakThreadCount();
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/net/VMPlainDatagramSocketImpl.java b/libjava/classpath/vm/reference/gnu/java/net/VMPlainDatagramSocketImpl.java
new file mode 100644
index 000000000..da0f893cf
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/net/VMPlainDatagramSocketImpl.java
@@ -0,0 +1,260 @@
+/* PlainDatagramSocketImpl.java -- VM interface for DatagramSocket impl
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+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.java.net;
+
+import gnu.classpath.Configuration;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketAddress;
+import java.net.SocketException;
+
+/**
+ * The VM interface for {@link gnu.java.net.PlainDatagramSocketImpl}.
+ *
+ * @author Ingo Proetel (proetel@aicas.com)
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public final class VMPlainDatagramSocketImpl
+{
+  /**
+   * Option id for the IP_TTL (time to live) value.
+   */
+  static final int IP_TTL = 0x1E61; // 7777
+
+
+  // Static initializer to load native library
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javanet");
+      }
+  }
+
+  /**
+   * Binds this socket to a particular port and interface
+   *
+   * @param socket the socket object
+   * @param port the port to bind to
+   * @param addr the address to bind to
+   *
+   * @throws SocketException If an error occurs
+   */
+  static native void bind(PlainDatagramSocketImpl socket, int port,
+                          InetAddress addr)
+    throws SocketException;
+
+  /**
+   * Creates a new datagram socket.
+   *
+   * @param socket the socket object
+   *
+   * @throws SocketException If an error occurs
+   */
+  static native void create(PlainDatagramSocketImpl socket)
+    throws SocketException;
+
+  /**
+   * Connects to the remote address and port specified as arguments.
+   *
+   * @param socket the socket object
+   * @param addr the remote address to connect to
+   * @param port the remote port to connect to
+   *
+   * @throws SocketException If an error occurs
+   */
+  static native void connect(PlainDatagramSocketImpl socket, InetAddress addr,
+                             int port)
+    throws SocketException;
+
+  /**
+   * Sends a packet of data to a remote host.
+   *
+   * @param socket the socket object
+   * @param packet the packet to send
+   *
+   * @throws IOException If an error occurs
+   */
+  static void send(PlainDatagramSocketImpl socket, DatagramPacket packet)
+    throws IOException
+  {
+    nativeSendTo(socket, packet.getAddress(), packet.getPort(),
+                 packet.getData(), packet.getOffset(), packet.getLength());
+  }
+
+
+  /**
+   * Sends a packet of data to a remote host.
+   *
+   * @param socket the socket object
+   * @param addr the address to send to
+   * @param port the port to send to
+   * @param buf the buffer to send
+   * @param offset the offset of the data in the buffer to send
+   * @param len the length of the data to send
+   *
+   * @throws IOException If an error occurs
+   */
+  private static native void nativeSendTo(PlainDatagramSocketImpl socket,
+                                          InetAddress addr, int port,
+                                          byte[] buf, int offset, int len)
+    throws IOException;
+
+  /**
+   * Receives a UDP packet from the network
+   *
+   * @param socket the socket object
+   * @param packet the packet to fill in with the data received
+   *
+   * @throws IOException IOException If an error occurs
+   */
+  static void receive(PlainDatagramSocketImpl socket, DatagramPacket packet)
+    throws IOException
+  {
+    byte[] receiveFromAddress = new byte[4];
+    int[] receiveFromPort = new int[1];
+    int[] receivedLength = new int[1];
+
+    nativeReceive(socket, packet.getData(), packet.getOffset(),
+                  packet.getLength(),
+                  receiveFromAddress, receiveFromPort, receivedLength);
+
+    packet.setAddress(InetAddress.getByAddress(receiveFromAddress));
+    packet.setPort(receiveFromPort[0]);
+    packet.setLength(receivedLength[0]);
+  }
+
+  private static native void nativeReceive(PlainDatagramSocketImpl socket,
+                                           byte[] buf, int offset, int len,
+                                           byte[] receiveFromAddress,
+                                           int[] receiveFromPort,
+                                           int[] receivedLength)
+    throws IOException;
+
+  /**
+   * Sets the value of an option on the socket
+   *
+   * @param socket the socket object
+   * @param optionId the identifier of the option to set
+   * @param value the value of the option to set
+   *
+   * @exception SocketException If an error occurs
+   */
+  static native void setOption(PlainDatagramSocketImpl socket, int optionId,
+                               Object value)
+    throws SocketException;
+
+  /**
+   * Retrieves the value of an option on the socket.
+   *
+   * @param socket the socket object
+   * @param optionId the identifier of the option to retrieve
+   *
+   * @return the value of the option
+   *
+   * @throws SocketException if an error occurs
+   */
+  static native Object getOption(PlainDatagramSocketImpl socket, int optionId)
+    throws SocketException;
+
+  /**
+   * Closes the socket.
+   *
+   * @param socket the socket object
+   */
+  static native void close(PlainDatagramSocketImpl socket);
+
+  /**
+   * Joins a multicast group
+   *
+   * @param addr The group to join
+   *
+   * @exception IOException If an error occurs
+   */
+  static native void join(PlainDatagramSocketImpl socket, InetAddress addr)
+    throws IOException;
+
+  /**
+   * Leaves a multicast group
+   *
+   * @param addr The group to leave
+   *
+   * @exception IOException If an error occurs
+   */
+  static native void leave(PlainDatagramSocketImpl socket, InetAddress addr)
+    throws IOException;
+
+  /**
+   * Joins a multicast group.
+   *
+   * @param socket the socket object
+   * @param address the socket address
+   * @param netIf the network interface
+   *
+   * @throws IOException if I/O errors occur
+   */
+  static void joinGroup(PlainDatagramSocketImpl socket, SocketAddress address,
+                        NetworkInterface netIf)
+    throws IOException
+  {
+    throw new InternalError
+      ("PlainDatagramSocketImpl::joinGroup is not implemented");
+  }
+
+  /**
+   * Leaves a multicast group.
+   *
+   * @param socket the socket object
+   * @param address the socket address
+   * @param netIf the network interface
+   *
+   * @throws IOException if I/O errors occur
+   */
+  static void leaveGroup(PlainDatagramSocketImpl socket, SocketAddress address,
+                         NetworkInterface netIf)
+    throws IOException
+  {
+    throw new InternalError
+      ("PlainDatagramSocketImpl::leaveGroup is not implemented");
+  }
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/net/VMPlainSocketImpl.java b/libjava/classpath/vm/reference/gnu/java/net/VMPlainSocketImpl.java
new file mode 100644
index 000000000..c72e6a5eb
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/net/VMPlainSocketImpl.java
@@ -0,0 +1,511 @@
+/* VMPlainSocketImpl.java -- VM interface for default socket implementation
+   Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+
+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.java.net;
+
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.net.SocketOptions;
+
+import gnu.classpath.Configuration;
+import gnu.java.nio.VMChannel;
+
+/**
+ * The VM interface for {@link gnu.java.net.PlainSocketImpl}.
+ *
+ * @author Ingo Proetel (proetel@aicas.com)
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public final class VMPlainSocketImpl
+{
+  /** Option id for time to live
+   */
+  private static final int CP_IP_TTL = 0x1E61;
+
+  private final State nfd;
+
+  /**
+   * Static initializer to load native library.
+   */
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javanet");
+      }
+  }
+
+  public VMPlainSocketImpl()
+  {
+    // XXX consider adding security check here.
+    nfd = new State();
+  }
+
+  public VMPlainSocketImpl(VMChannel channel) throws IOException
+  {
+    this();
+    nfd.setChannelFD(channel.getState());
+  }
+
+  public State getState()
+  {
+    return nfd;
+  }
+
+  /** This method exists to hide the CP_IP_TTL value from
+   * higher levels.
+   *
+   * Always think of JNode ... :)
+   */
+  public void setTimeToLive(int ttl)
+    throws SocketException
+  {
+    try
+      {
+        setOption(nfd.getNativeFD(), CP_IP_TTL, ttl);
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+  }
+
+  public int getTimeToLive()
+    throws SocketException
+  {
+    try
+      {
+        return getOption(nfd.getNativeFD(), CP_IP_TTL);
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+  }
+
+  public void setOption(int optionId, Object optionValue)
+    throws SocketException
+  {
+    int value;
+    if (optionValue instanceof Integer)
+      value = ((Integer) optionValue).intValue();
+    else if (optionValue instanceof Boolean)
+      // Switching off the linger behavior is done by setting
+      // the value to -1. This is how the Java API interprets
+      // it.
+      value = ((Boolean) optionValue).booleanValue()
+              ? 1
+              : (optionId == SocketOptions.SO_LINGER)
+              ? -1
+              : 0;
+    else
+      throw new IllegalArgumentException("option value type "
+                                         + optionValue.getClass().getName());
+
+    try
+      {
+        setOption(nfd.getNativeFD(), optionId, value);
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+  }
+
+  private static native void setOption(int fd, int id, int value)
+    throws SocketException;
+
+  public void setMulticastInterface(int optionId, InetAddress addr)
+    throws SocketException
+  {
+    try
+      {
+        if (addr instanceof Inet4Address)
+          setMulticastInterface(nfd.getNativeFD(), optionId, (Inet4Address) addr);
+        else if (addr instanceof Inet6Address)
+          {
+            NetworkInterface iface = NetworkInterface.getByInetAddress(addr);
+            setMulticastInterface6(nfd.getNativeFD(), optionId, iface.getName());
+          }
+        else
+          throw new SocketException("Unknown address format: " + addr);
+      }
+    catch (SocketException se)
+      {
+        throw se;
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+  }
+
+  private static native void setMulticastInterface(int fd,
+                                                   int optionId,
+                                                   Inet4Address addr);
+
+  private static native void setMulticastInterface6(int fd,
+                                                    int optionId,
+                                                    String ifName);
+
+  /**
+   * Get a socket option. This implementation is only required to support
+   * socket options that are boolean values, which include:
+   *
+   *  SocketOptions.IP_MULTICAST_LOOP
+   *  SocketOptions.SO_BROADCAST
+   *  SocketOptions.SO_KEEPALIVE
+   *  SocketOptions.SO_OOBINLINE
+   *  SocketOptions.SO_REUSEADDR
+   *  SocketOptions.TCP_NODELAY
+   *
+   * and socket options that are integer values, which include:
+   *
+   *  SocketOptions.IP_TOS
+   *  SocketOptions.SO_LINGER
+   *  SocketOptions.SO_RCVBUF
+   *  SocketOptions.SO_SNDBUF
+   *  SocketOptions.SO_TIMEOUT
+   *
+   * @param optionId The option ID to fetch.
+   * @return A {@link Boolean} or {@link Integer} containing the socket
+   *  option.
+   * @throws SocketException
+   */
+  public Object getOption(int optionId) throws SocketException
+  {
+    int value;
+    try
+      {
+        value = getOption(nfd.getNativeFD(), optionId);
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+
+    switch (optionId)
+      {
+        case SocketOptions.IP_MULTICAST_LOOP:
+        case SocketOptions.SO_BROADCAST:
+        case SocketOptions.SO_KEEPALIVE:
+        case SocketOptions.SO_OOBINLINE:
+        case SocketOptions.SO_REUSEADDR:
+        case SocketOptions.TCP_NODELAY:
+          return Boolean.valueOf(value != 0);
+
+        case SocketOptions.IP_TOS:
+        case SocketOptions.SO_LINGER:
+        case SocketOptions.SO_RCVBUF:
+        case SocketOptions.SO_SNDBUF:
+        case SocketOptions.SO_TIMEOUT:
+          return new Integer(value);
+
+        default:
+          throw new SocketException("getting option " + optionId +
+                                    " not supported here");
+      }
+  }
+
+  private static native int getOption(int fd, int id) throws SocketException;
+
+  /**
+   * Returns an Inet4Address or Inet6Address instance belonging to the
+   * interface which is set as the multicast interface.
+   *
+   * The optionId is provided to make it possible that the native
+   * implementation may do something different depending on whether
+   * the value is SocketOptions.IP_MULTICAST_IF or
+   * SocketOptions.IP_MULTICAST_IF2.
+   */
+  public InetAddress getMulticastInterface(int optionId)
+    throws SocketException
+  {
+    try
+      {
+        return getMulticastInterface(nfd.getNativeFD(), optionId);
+      }
+    catch (IOException ioe)
+      {
+        SocketException se = new SocketException();
+        se.initCause(ioe);
+        throw se;
+      }
+  }
+
+  private static native InetAddress getMulticastInterface(int fd,
+                                                          int optionId);
+
+  /**
+   * Binds this socket to the given local address and port.
+   *
+   * @param address The address to bind to; the InetAddress is either
+   *  an IPv4 or IPv6 address.
+   * @throws IOException If binding fails; for example, if the port
+   *  in the given InetSocketAddress is privileged, and the current
+   *  process has insufficient privileges.
+   */
+  public void bind(InetSocketAddress address) throws IOException
+  {
+    InetAddress addr = address.getAddress();
+    if (addr instanceof Inet4Address)
+      {
+        bind (nfd.getNativeFD(), addr.getAddress(), address.getPort());
+      }
+    else if (addr instanceof Inet6Address)
+      bind6 (nfd.getNativeFD(), addr.getAddress(), address.getPort());
+    else
+      throw new SocketException ("unsupported address type");
+  }
+
+  /**
+   * Native bind function for IPv4 addresses. The addr array must be
+   * exactly four bytes long.
+   *
+   * VMs without native support need not implement this.
+   *
+   * @param fd The native file descriptor integer.
+   * @param addr The IPv4 address, in network byte order.
+   * @param port The port to bind to.
+   * @throws IOException
+   */
+  private static native void bind(int fd, byte[] addr, int port)
+    throws IOException;
+
+  /**
+   * Native bind function for IPv6 addresses. The addr array must be
+   * exactly sixteen bytes long.
+   *
+   * VMs without native support need not implement this.
+   *
+   * @param fd The native file descriptor integer.
+   * @param addr The IPv6 address, in network byte order.
+   * @param port The port to bind to.
+   * @throws IOException
+   */
+  private static native void bind6(int fd, byte[] addr, int port)
+    throws IOException;
+
+  /**
+   * Listen on this socket for incoming connections.
+   *
+   * @param backlog The backlog of connections.
+   * @throws IOException If listening fails.
+   * @see gnu.java.nio.VMChannel#accept()
+   */
+  public void listen(int backlog) throws IOException
+  {
+    listen(nfd.getNativeFD(), backlog);
+  }
+
+  /**
+   * Native listen function. VMs without native support need not implement
+   * this.
+   *
+   * @param fd The file descriptor integer.
+   * @param backlog The listen backlog size.
+   * @throws IOException
+   */
+  private static native void listen(int fd, int backlog) throws IOException;
+
+  public void join(InetAddress group) throws IOException
+  {
+    if (group instanceof Inet4Address)
+      join(nfd.getNativeFD(), group.getAddress());
+    else if (group instanceof Inet6Address)
+      join6(nfd.getNativeFD(), group.getAddress());
+    else
+      throw new IllegalArgumentException("unknown address type");
+  }
+
+  private static native void join(int fd, byte[] addr) throws IOException;
+
+  private static native void join6(int fd, byte[] addr) throws IOException;
+
+  public void leave(InetAddress group) throws IOException
+  {
+    if (group instanceof Inet4Address)
+      leave(nfd.getNativeFD(), group.getAddress());
+    else if (group instanceof Inet6Address)
+      leave6(nfd.getNativeFD(), group.getAddress());
+    else
+      throw new IllegalArgumentException("unknown address type");
+  }
+
+  private static native void leave(int fd, byte[] addr) throws IOException;
+
+  private static native void leave6(int fd, byte[] addr) throws IOException;
+
+  public void joinGroup(InetSocketAddress addr, NetworkInterface netif)
+    throws IOException
+  {
+    InetAddress address = addr.getAddress();
+
+    if (address instanceof Inet4Address)
+      joinGroup(nfd.getNativeFD(), address.getAddress(),
+                netif != null ? netif.getName() : null);
+    else if (address instanceof Inet6Address)
+      joinGroup6(nfd.getNativeFD(), address.getAddress(),
+                 netif != null ? netif.getName() : null);
+    else
+      throw new IllegalArgumentException("unknown address type");
+  }
+
+  private static native void joinGroup(int fd, byte[] addr, String ifname)
+    throws IOException;
+
+  private static native void joinGroup6(int fd, byte[] addr, String ifname)
+    throws IOException;
+
+  public void leaveGroup(InetSocketAddress addr, NetworkInterface netif)
+    throws IOException
+  {
+    InetAddress address = addr.getAddress();
+    if (address instanceof Inet4Address)
+      leaveGroup(nfd.getNativeFD(), address.getAddress(),
+                 netif != null ? netif.getName() : null);
+    else if (address instanceof Inet6Address)
+      leaveGroup6(nfd.getNativeFD(), address.getAddress(),
+                 netif != null ? netif.getName() : null);
+    else
+      throw new IllegalArgumentException("unknown address type");
+  }
+
+  private static native void leaveGroup(int fd, byte[] addr, String ifname)
+    throws IOException;
+
+  private static native void leaveGroup6(int fd, byte[] addr, String ifname)
+    throws IOException;
+
+
+  public void shutdownInput() throws IOException
+  {
+    shutdownInput(nfd.getNativeFD());
+  }
+
+  private static native void shutdownInput(int native_fd) throws IOException;
+
+  public void shutdownOutput() throws IOException
+  {
+    shutdownOutput(nfd.getNativeFD());
+  }
+
+  private static native void shutdownOutput(int native_fd) throws IOException;
+
+  public void sendUrgentData(int data) throws IOException
+  {
+    sendUrgentData(nfd.getNativeFD(), data);
+  }
+
+  private static native void sendUrgentData(int natfive_fd, int data) throws IOException;
+
+  public void close() throws IOException
+  {
+    nfd.close();
+  }
+
+  // Inner classes.
+
+  /**
+   * Our wrapper for the native file descriptor. In this implementation,
+   * it is a simple wrapper around {@link VMChannel.State}, to simplify
+   * management of the native state.
+   */
+  public final class State
+  {
+    private VMChannel.State channelFd;
+
+    State()
+    {
+      channelFd = null;
+    }
+
+    public boolean isValid()
+    {
+      if (channelFd != null)
+        return channelFd.isValid();
+      return false;
+    }
+
+    public int getNativeFD() throws IOException
+    {
+      return channelFd.getNativeFD();
+    }
+
+    public void setChannelFD(final VMChannel.State nfd) throws IOException
+    {
+      if (this.channelFd != null && this.channelFd.isValid())
+        throw new IOException("file descriptor already initialized");
+      this.channelFd = nfd;
+    }
+
+    public void close() throws IOException
+    {
+      if (channelFd == null)
+        throw new IOException("invalid file descriptor");
+      channelFd.close();
+    }
+
+    protected void finalize() throws Throwable
+    {
+      try
+        {
+          if (isValid())
+            close();
+        }
+      finally
+        {
+          super.finalize();
+        }
+    }
+  }
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/nio/VMChannel.java b/libjava/classpath/vm/reference/gnu/java/nio/VMChannel.java
new file mode 100644
index 000000000..4494ff13c
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/nio/VMChannel.java
@@ -0,0 +1,749 @@
+/* VMChannel.java -- Native interface suppling channel operations.
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+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.java.nio;
+
+import gnu.classpath.Configuration;
+
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.net.SocketException;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+
+/**
+ * Native interface to support configuring of channel to run in a non-blocking
+ * manner and support scatter/gather io operations.
+ *
+ * @author Michael Barker <mike@middlesoft.co.uk>
+ *
+ */
+public final class VMChannel
+{
+  /**
+   * Our reference implementation uses an integer to store the native
+   * file descriptor. Implementations without such support
+   */
+  private final State nfd;
+
+  private Kind kind;
+
+  public VMChannel()
+  {
+    // XXX consider adding security check here, so only Classpath
+    // code may create instances.
+    this.nfd = new State();
+    kind = Kind.OTHER;
+  }
+
+  /**
+   * This constructor is used by the POSIX reference implementation;
+   * other virtual machines need not support it.
+   *
+   * <strong>Important:</strong> do not call this in library code that is
+   * not specific to Classpath's reference implementation.
+   *
+   * @param native_fd The native file descriptor integer.
+   * @throws IOException
+   */
+  VMChannel(final int native_fd) throws IOException
+  {
+    this();
+    this.nfd.setNativeFD(native_fd);
+  }
+
+  public State getState()
+  {
+    return nfd;
+  }
+
+  static
+  {
+    // load the shared library needed for native methods.
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary ("javanio");
+      }
+    initIDs();
+  }
+
+  public static VMChannel getStdin() throws IOException
+  {
+    return new VMChannel(stdin_fd());
+  }
+
+  public static VMChannel getStdout() throws IOException
+  {
+    return new VMChannel(stdout_fd());
+  }
+
+  public static VMChannel getStderr() throws IOException
+  {
+    return new VMChannel(stderr_fd());
+  }
+
+  private static native int stdin_fd();
+  private static native int stdout_fd();
+  private static native int stderr_fd();
+
+  /**
+   * Set the file descriptor to have the required blocking
+   * setting.
+   *
+   * @param blocking The blocking flag to set.
+   */
+  public void setBlocking(boolean blocking) throws IOException
+  {
+    setBlocking(nfd.getNativeFD(), blocking);
+  }
+
+  private static native void setBlocking(int fd, boolean blocking)
+    throws IOException;
+
+  public int available() throws IOException
+  {
+    return available(nfd.getNativeFD());
+  }
+
+  private static native int available(int native_fd) throws IOException;
+
+  /**
+   * Reads a byte buffer directly using the supplied file descriptor.
+   *
+   * @param dst Direct Byte Buffer to read to.
+   * @return Number of bytes read.
+   * @throws IOException If an error occurs or dst is not a direct buffers.
+   */
+  public int read(ByteBuffer dst)
+    throws IOException
+  {
+    return read(nfd.getNativeFD(), dst);
+  }
+
+  private static native int read(int fd, ByteBuffer dst) throws IOException;
+
+  /**
+   * Read a single byte.
+   *
+   * @return The byte read, or -1 on end of file.
+   * @throws IOException
+   */
+  public int read() throws IOException
+  {
+    return read(nfd.getNativeFD());
+  }
+
+  private static native int read(int fd) throws IOException;
+
+  /**
+   * Reads into byte buffers directly using the supplied file descriptor.
+   * Assumes that the buffer list contains DirectBuffers.  Will perform a
+   * scattering read.
+   *
+   * @param dsts An array direct byte buffers.
+   * @param offset Index of the first buffer to read to.
+   * @param length The number of buffers to read to.
+   * @return Number of bytes read.
+   * @throws IOException If an error occurs or the dsts are not direct buffers.
+   */
+  public long readScattering(ByteBuffer[] dsts, int offset, int length)
+    throws IOException
+  {
+    if (offset + length > dsts.length)
+      throw new IndexOutOfBoundsException("offset + length > dsts.length");
+
+    return readScattering(nfd.getNativeFD(), dsts, offset, length);
+  }
+
+  private static native long readScattering(int fd, ByteBuffer[] dsts,
+                                            int offset, int length)
+    throws IOException;
+
+  /**
+   * Receive a datagram on this channel, returning the host address
+   * that sent the datagram.
+   *
+   * @param dst Where to store the datagram.
+   * @return The host address that sent the datagram.
+   * @throws IOException
+   */
+  public SocketAddress receive(ByteBuffer dst) throws IOException
+  {
+    if (kind != Kind.SOCK_DGRAM)
+      throw new SocketException("not a datagram socket");
+    ByteBuffer hostPort = ByteBuffer.allocateDirect(18);
+    int hostlen = receive(nfd.getNativeFD(), dst, hostPort);
+    if (hostlen == 0)
+      return null;
+    if (hostlen == 4) // IPv4
+      {
+        byte[] addr = new byte[4];
+        hostPort.get(addr);
+        int port = hostPort.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet4Address.getByAddress(addr), port);
+      }
+    if (hostlen == 16) // IPv6
+      {
+        byte[] addr = new byte[16];
+        hostPort.get(addr);
+        int port = hostPort.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet6Address.getByAddress(addr), port);
+      }
+
+    throw new SocketException("host address received with invalid length: "
+                              + hostlen);
+  }
+
+  private static native int receive (int fd, ByteBuffer dst, ByteBuffer address)
+    throws IOException;
+
+  /**
+   * Writes from a direct byte bufer using the supplied file descriptor.
+   * Assumes the buffer is a DirectBuffer.
+   *
+   * @param src The source buffer.
+   * @return Number of bytes written.
+   * @throws IOException
+   */
+  public int write(ByteBuffer src) throws IOException
+  {
+    return write(nfd.getNativeFD(), src);
+  }
+
+  private native int write(int fd, ByteBuffer src) throws IOException;
+
+  /**
+   * Writes from byte buffers directly using the supplied file descriptor.
+   * Assumes the that buffer list constains DirectBuffers.  Will perform
+   * as gathering write.
+   *
+   * @param srcs
+   * @param offset
+   * @param length
+   * @return Number of bytes written.
+   * @throws IOException
+   */
+  public long writeGathering(ByteBuffer[] srcs, int offset, int length)
+    throws IOException
+  {
+    if (offset + length > srcs.length)
+      throw new IndexOutOfBoundsException("offset + length > srcs.length");
+
+    // A gathering write is limited to 16 buffers; when writing, ensure
+    // that we have at least one buffer with something in it in the 16
+    // buffer window starting at offset.
+    while (!srcs[offset].hasRemaining() && offset < srcs.length)
+      offset++;
+
+    // There are no buffers with anything to write.
+    if (offset == srcs.length)
+      return 0;
+
+    // If we advanced `offset' so far that we don't have `length'
+    // buffers left, reset length to only the remaining buffers.
+    if (length > srcs.length - offset)
+      length = srcs.length - offset;
+
+    return writeGathering(nfd.getNativeFD(), srcs, offset, length);
+  }
+
+  private native long writeGathering(int fd, ByteBuffer[] srcs,
+                                     int offset, int length)
+    throws IOException;
+
+  /**
+   * Send a datagram to the given address.
+   *
+   * @param src The source buffer.
+   * @param dst The destination address.
+   * @return The number of bytes written.
+   * @throws IOException
+   */
+  public int send(ByteBuffer src, InetSocketAddress dst)
+    throws IOException
+  {
+    InetAddress addr = dst.getAddress();
+    if (addr == null)
+      throw new NullPointerException();
+    if (addr instanceof Inet4Address)
+      return send(nfd.getNativeFD(), src, addr.getAddress(), dst.getPort());
+    else if (addr instanceof Inet6Address)
+      return send6(nfd.getNativeFD(), src, addr.getAddress(), dst.getPort());
+    else
+      throw new SocketException("unrecognized inet address type");
+  }
+
+  // Send to an IPv4 address.
+  private static native int send(int fd, ByteBuffer src, byte[] addr, int port)
+    throws IOException;
+
+  // Send to an IPv6 address.
+  private static native int send6(int fd, ByteBuffer src, byte[] addr, int port)
+    throws IOException;
+
+  /**
+   * Write a single byte.
+   *
+   * @param b The byte to write.
+   * @throws IOException
+   */
+  public void write(int b) throws IOException
+  {
+    write(nfd.getNativeFD(), b);
+  }
+
+  private static native void write(int fd, int b) throws IOException;
+
+  private native static void initIDs();
+
+  // Network (socket) specific methods.
+
+  /**
+   * Create a new socket. This method will initialize the native file
+   * descriptor state of this instance.
+   *
+   * @param stream Whether or not to create a streaming socket, or a datagram
+   *  socket.
+   * @throws IOException If creating a new socket fails, or if this
+   *  channel already has its native descriptor initialized.
+   */
+  public void initSocket(boolean stream) throws IOException
+  {
+    if (nfd.isValid())
+      throw new IOException("native FD already initialized");
+    if (stream)
+      kind = Kind.SOCK_STREAM;
+    else
+      kind = Kind.SOCK_DGRAM;
+    nfd.setNativeFD(socket(stream));
+  }
+
+  /**
+   * Create a new socket, returning the native file descriptor.
+   *
+   * @param stream Set to true for streaming sockets; false for datagrams.
+   * @return The native file descriptor.
+   * @throws IOException If creating the socket fails.
+   */
+  private static native int socket(boolean stream) throws IOException;
+
+  /**
+   * Connect the underlying socket file descriptor to the remote host.
+   *
+   * @param saddr The address to connect to.
+   * @param timeout The connect timeout to use for blocking connects.
+   * @return True if the connection succeeded; false if the file descriptor
+   *  is in non-blocking mode and the connection did not immediately
+   *  succeed.
+   * @throws IOException If an error occurs while connecting.
+   */
+  public boolean connect(InetSocketAddress saddr, int timeout)
+    throws SocketException
+  {
+    int fd;
+
+    InetAddress addr = saddr.getAddress();
+
+    // Translates an IOException into a SocketException to conform
+    // to the throws clause.
+    try
+      {
+        fd = nfd.getNativeFD();
+      }
+    catch (IOException ioe)
+      {
+        throw new SocketException(ioe.getMessage());
+      }
+
+    if (addr instanceof Inet4Address)
+      return connect(fd, addr.getAddress(), saddr.getPort(),
+                     timeout);
+    if (addr instanceof Inet6Address)
+      return connect6(fd, addr.getAddress(), saddr.getPort(),
+                      timeout);
+    throw new SocketException("unsupported internet address");
+  }
+
+  private static native boolean connect(int fd, byte[] addr, int port, int timeout)
+    throws SocketException;
+
+  private static native boolean connect6(int fd, byte[] addr, int port, int timeout)
+    throws SocketException;
+
+  /**
+   * Disconnect this channel, if it is a datagram socket. Disconnecting
+   * a datagram channel will disassociate it from any address, so the
+   * socket will remain open, but can send and receive datagrams from
+   * any address.
+   *
+   * @throws IOException If disconnecting this channel fails, or if this
+   *  channel is not a datagram channel.
+   */
+  public void disconnect() throws IOException
+  {
+    if (kind != Kind.SOCK_DGRAM)
+      throw new IOException("can only disconnect datagram channels");
+    disconnect(nfd.getNativeFD());
+  }
+
+  private static native void disconnect(int fd) throws IOException;
+
+  public InetSocketAddress getLocalAddress() throws IOException
+  {
+    if (!nfd.isValid())
+      return null;
+    ByteBuffer name = ByteBuffer.allocateDirect(18);
+    int namelen = getsockname(nfd.getNativeFD(), name);
+    if (namelen == 0) // not bound
+      return null; // XXX return some wildcard?
+    if (namelen == 4)
+      {
+        byte[] addr = new byte[4];
+        name.get(addr);
+        int port = name.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet4Address.getByAddress(addr), port);
+      }
+    if (namelen == 16)
+      {
+        byte[] addr = new byte[16];
+        name.get(addr);
+        int port = name.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet6Address.getByAddress(addr), port);
+      }
+    throw new SocketException("invalid address length");
+  }
+
+  private static native int getsockname(int fd, ByteBuffer name)
+    throws IOException;
+
+  /**
+   * Returns the socket address of the remote peer this channel is connected
+   * to, or null if this channel is not yet connected.
+   *
+   * @return The peer address.
+   * @throws IOException
+   */
+  public InetSocketAddress getPeerAddress() throws IOException
+  {
+    if (!nfd.isValid())
+      return null;
+    ByteBuffer name = ByteBuffer.allocateDirect(18);
+    int namelen = getpeername (nfd.getNativeFD(), name);
+    if (namelen == 0) // not connected yet
+      return null;
+    if (namelen == 4) // IPv4
+      {
+        byte[] addr = new byte[4];
+        name.get(addr);
+        int port = name.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet4Address.getByAddress(addr), port);
+      }
+    else if (namelen == 16) // IPv6
+      {
+        byte[] addr = new byte[16];
+        name.get(addr);
+        int port = name.getShort() & 0xFFFF;
+        return new InetSocketAddress(Inet6Address.getByAddress(addr), port);
+      }
+    throw new SocketException("invalid address length");
+  }
+
+  /*
+   * The format here is the peer address, followed by the port number.
+   * The returned value is the length of the peer address; thus, there
+   * will be LEN + 2 valid bytes put into NAME.
+   */
+  private static native int getpeername(int fd, ByteBuffer name)
+    throws IOException;
+
+  /**
+   * Accept an incoming connection, returning a new VMChannel, or null
+   * if the channel is nonblocking and no connection is pending.
+   *
+   * @return The accepted connection, or null.
+   * @throws IOException If an IO error occurs.
+   */
+  public VMChannel accept() throws IOException
+  {
+    int new_fd = accept(nfd.getNativeFD());
+    if (new_fd == -1) // non-blocking accept had no pending connection
+      return null;
+    return new VMChannel(new_fd);
+  }
+
+  private static native int accept(int native_fd) throws IOException;
+
+  // File-specific methods.
+
+  /**
+   * Open a file at PATH, initializing the native state to operate on
+   * that open file.
+   *
+   * @param path The absolute file path.
+   * @throws IOException If the file cannot be opened, or if this
+   *  channel was previously initialized.
+   */
+  public void openFile(String path, int mode) throws IOException
+  {
+    if (nfd.isValid() || nfd.isClosed())
+      throw new IOException("can't reinitialize this channel");
+    int fd = open(path, mode);
+    nfd.setNativeFD(fd);
+    kind = Kind.FILE;
+  }
+
+  private static native int open(String path, int mode) throws IOException;
+
+  public long position() throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    return position(nfd.getNativeFD());
+  }
+
+  private static native long position(int fd) throws IOException;
+
+  public void seek(long pos) throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    seek(nfd.getNativeFD(), pos);
+  }
+
+  private static native void seek(int fd, long pos) throws IOException;
+
+  public void truncate(long length) throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    truncate(nfd.getNativeFD(), length);
+  }
+
+  private static native void truncate(int fd, long len) throws IOException;
+
+  public boolean lock(long pos, long len, boolean shared, boolean wait)
+    throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    return lock(nfd.getNativeFD(), pos, len, shared, wait);
+  }
+
+  private static native boolean lock(int fd, long pos, long len,
+                                     boolean shared, boolean wait)
+    throws IOException;
+
+  public void unlock(long pos, long len) throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    unlock(nfd.getNativeFD(), pos, len);
+  }
+
+  private static native void unlock(int fd, long pos, long len) throws IOException;
+
+  public long size() throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    return size(nfd.getNativeFD());
+  }
+
+  private static native long size(int fd) throws IOException;
+
+  public MappedByteBuffer map(char mode, long position, int size)
+    throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    return map(nfd.getNativeFD(), mode, position, size);
+  }
+
+  private static native MappedByteBuffer map(int fd, char mode,
+                                             long position, int size)
+    throws IOException;
+
+  public boolean flush(boolean metadata) throws IOException
+  {
+    if (kind != Kind.FILE)
+      throw new IOException("not a file");
+    return flush(nfd.getNativeFD(), metadata);
+  }
+
+  private static native boolean flush(int fd, boolean metadata) throws IOException;
+
+  // Close.
+
+  /**
+   * Close this socket. The socket is also automatically closed when this
+   * object is finalized.
+   *
+   * @throws IOException If closing the socket fails, or if this object has
+   *  no open socket.
+   */
+  public void close() throws IOException
+  {
+    nfd.close();
+  }
+
+  static native void close(int native_fd) throws IOException;
+
+  /**
+   * <p>Provides a simple mean for the JNI code to find out whether the
+   * current thread was interrupted by a call to Thread.interrupt().</p>
+   *
+   * @return
+   */
+  static boolean isThreadInterrupted()
+  {
+    return Thread.currentThread().isInterrupted();
+  }
+
+  // Inner classes.
+
+  /**
+   * A wrapper for a native file descriptor integer. This tracks the state
+   * of an open file descriptor, and ensures that
+   *
+   * This class need not be fully supported by virtual machines; if a
+   * virtual machine does not use integer file descriptors, or does and
+   * wishes to hide that, then the methods of this class may be stubbed out.
+   *
+   * System-specific classes that depend on access to native file descriptor
+   * integers SHOULD declare this fact.
+   */
+  public final class State
+  {
+    private int native_fd;
+    private boolean valid;
+    private boolean closed;
+
+    State()
+    {
+      native_fd = -1;
+      valid = false;
+      closed = false;
+    }
+
+    public boolean isValid()
+    {
+      return valid;
+    }
+
+    public boolean isClosed()
+    {
+      return closed;
+    }
+
+    public int getNativeFD() throws IOException
+    {
+      if (!valid)
+        throw new IOException("invalid file descriptor");
+      return native_fd;
+    }
+
+    void setNativeFD(final int native_fd) throws IOException
+    {
+      if (valid)
+        throw new IOException("file descriptor already initialized");
+      this.native_fd = native_fd;
+      valid = true;
+    }
+
+    public void close() throws IOException
+    {
+      if (!valid)
+        throw new IOException("invalid file descriptor");
+      try
+        {
+          VMChannel.close(native_fd);
+        }
+      finally
+        {
+          valid = false;
+          closed = true;
+        }
+    }
+
+    public String toString()
+    {
+      if (closed)
+        return "<<closed>>";
+      if (!valid)
+        return "<<invalid>>";
+      return String.valueOf(native_fd);
+    }
+
+    protected void finalize() throws Throwable
+    {
+      try
+        {
+          if (valid)
+            close();
+        }
+      finally
+        {
+          super.finalize();
+        }
+    }
+  }
+
+  /**
+   * An enumeration of possible kinds of channel.
+   */
+  static class Kind // XXX enum
+  {
+    /** A streaming (TCP) socket. */
+    static final Kind SOCK_STREAM = new Kind();
+
+    /** A datagram (UDP) socket. */
+    static final Kind SOCK_DGRAM = new Kind();
+
+    /** A file. */
+    static final Kind FILE = new Kind();
+
+    /** Something else; not a socket or file. */
+    static final Kind OTHER = new Kind();
+
+    private Kind() { }
+  }
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java b/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java
new file mode 100644
index 000000000..a36970452
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java
@@ -0,0 +1,80 @@
+/* VMPipe.java -- Reference implementation for VM hooks used by PipeImpl
+   Copyright (C) 2004 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.java.nio;
+
+import java.io.IOException;
+import gnu.classpath.Configuration;
+
+/**
+ * This class contains the native methods for gnu.java.nio.PipeImpl
+ * As such, it needs help from the VM.
+ *
+ * @author Patrik Reali
+ */
+final class VMPipe
+{
+
+  static
+  {
+    // load the shared library needed for native methods.
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary ("javanio");
+      }
+  }
+
+  /**
+   * Create a pipe, consisting of a readable VMChannel and a writable
+   * VMChannel. The readable channel is returned is the first element
+   * of the array, and the writable in the second.
+   *
+   * @return A pair of VMChannels; the first readable, the second
+   *  writable.
+   * @throws IOException If the pipe cannot be created.
+   */
+  static VMChannel[] pipe() throws IOException
+  {
+    VMChannel[] pipe = new VMChannel[2];
+    int[] fds = pipe0();
+    pipe[0] = new VMChannel(fds[0]);
+    pipe[1] = new VMChannel(fds[1]);
+    return pipe;
+  }
+
+  private static native int[] pipe0() throws IOException;
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java b/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java
new file mode 100644
index 000000000..4d37c2c1c
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java
@@ -0,0 +1,59 @@
+/* VMSelector.java --
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+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.java.nio;
+
+import gnu.classpath.Configuration;
+import java.io.IOException;
+
+public final class VMSelector
+{
+  static
+  {
+    // load the shared library needed for native methods.
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary ("javanio");
+      }
+  }
+
+  // A timeout value of 0 means block forever.
+  static native int select (int[] read, int[] write,
+                                        int[] except, long timeout)
+    throws IOException;
+
+}
diff --git a/libjava/classpath/vm/reference/gnu/java/security/jce/prng/VMSecureRandom.java b/libjava/classpath/vm/reference/gnu/java/security/jce/prng/VMSecureRandom.java
new file mode 100644
index 000000000..86faa097c
--- /dev/null
+++ b/libjava/classpath/vm/reference/gnu/java/security/jce/prng/VMSecureRandom.java
@@ -0,0 +1,129 @@
+/* VMSecureRandom.java -- random seed generator.
+   Copyright (C) 2006  Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, 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.java.security.jce.prng;
+
+/**
+ * VM-specific methods for generating real (or almost real) random
+ * seeds. VM implementors should write a version of this class that
+ * reads random bytes from some system source.
+ *
+ * <p>The default implementation of this class runs eight threads that
+ * increment counters in a tight loop, and XORs each counter to
+ * produce one byte of seed data. This is not very efficient, and is
+ * not guaranteed to be random (the thread scheduler is probably
+ * deterministic, after all). If possible, VM implementors should
+ * reimplement this class so it obtains a random seed from a system
+ * facility, such as a system entropy gathering device or hardware
+ * random number generator.
+ */
+final class VMSecureRandom
+{
+
+  /**
+   * Generate a random seed. Implementations are free to generate
+   * fewer random bytes than are requested, and leave the remaining
+   * bytes of the destination buffer as zeros. Implementations SHOULD,
+   * however, make a best-effort attempt to satisfy the request.
+   *
+   * @param buffer The destination buffer.
+   * @param offset The offset in the buffer to start putting bytes.
+   * @param length The number of random bytes to generate.
+   */
+  static int generateSeed(byte[] buffer, int offset, int length)
+  {
+    if (length < 0)
+      throw new IllegalArgumentException("length must be nonnegative");
+    if (offset < 0 || offset + length > buffer.length)
+      throw new IndexOutOfBoundsException();
+
+    Spinner[] spinners = new Spinner[8];
+    int n = 0x1;
+    for (int i = 0; i < spinners.length; i++)
+      {
+        spinners[i] = new Spinner((byte) n);
+        Thread t = new Thread(spinners[i]);
+        t.start();
+        n <<= 1;
+      }
+
+    // Wait until at least one spinner has started.
+    while (!(spinners[0].running || spinners[1].running || spinners[2].running
+             || spinners[3].running || spinners[4].running || spinners[5].running
+             || spinners[6].running || spinners[7].running))
+      {
+        Thread.yield();
+      }
+
+    for (int i = offset; i < length; i++)
+      {
+        buffer[i] = (byte) (spinners[0].value ^ spinners[1].value ^ spinners[2].value
+                            ^ spinners[3].value ^ spinners[4].value ^ spinners[5].value
+                            ^ spinners[6].value ^ spinners[7].value);
+        Thread.yield();
+      }
+
+    for (int i = 0; i < spinners.length; i++)
+      spinners[i].stop();
+
+    return length;
+  }
+
+  static class Spinner implements Runnable
+  {
+    volatile byte value;
+    volatile boolean running;
+
+    Spinner(final byte initial)
+    {
+      value = initial;
+    }
+
+    public void run()
+    {
+      running = true;
+      while (running)
+        value++;
+    }
+
+    private void stop()
+    {
+      running = false;
+    }
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/io/VMFile.java b/libjava/classpath/vm/reference/java/io/VMFile.java
new file mode 100644
index 000000000..2af1e95c8
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/io/VMFile.java
@@ -0,0 +1,367 @@
+/* VMFile.java -- Class for methods natively accessing files
+   Copyright (C) 2004, 2006  Free Software Foundation, Inc.
+
+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 java.io;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import gnu.classpath.Configuration;
+import gnu.java.io.PlatformHelper;
+
+
+/**
+ * @author Michael Koch (konqueror@gmx.de)
+ */
+final class VMFile
+{
+  // FIXME: We support only case sensitive filesystems currently.
+  static final boolean IS_CASE_SENSITIVE = true;
+  static final boolean IS_DOS_8_3 = false;
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javaio");
+      }
+  }
+
+  /*
+   * This native method does the actual work of getting the last file
+   * modification time.  It also does the existence check to avoid the
+   * overhead of a call to exists()
+   */
+  static native long lastModified(String path);
+
+  /*
+   * This native method sets the permissions to make the file read only.
+   */
+  static native boolean setReadOnly(String path);
+
+  /**
+   * This method is used to create a temporary file
+   */
+  static native boolean create(String path) throws IOException;
+
+  /*
+   * This native function actually produces the list of files in this
+   * directory
+   */
+  static native synchronized String[] list(String dirpath);
+
+  /*
+   * This native method actually performs the rename.
+   */
+  static native boolean renameTo(String targetpath, String destpath);
+
+  /*
+   * This native method actually determines the length of the file and
+   * handles the existence check
+   */
+  static native long length(String path);
+
+  /*
+   * This native method does the actual checking of file existence.
+   */
+  static native boolean exists(String path);
+
+  /*
+   * This native method handles the actual deleting of the file
+   */
+  static native boolean delete(String path);
+
+  /*
+   * This method does the actual setting of the modification time.
+   */
+  static native boolean setLastModified(String path, long time);
+
+  /*
+   * This native method actually creates the directory
+   */
+  static native boolean mkdir(String dirpath);
+
+  /**
+   * Gets the total bytes of the filesystem named by path.
+   */
+  public static native long getTotalSpace(String path);
+
+  /**
+   * Gets the total free bytes of the filesystem named by path.
+   */
+  public static native long getFreeSpace(String path);
+
+  /**
+   * Gets the available bytes of the filesystem named by path.
+   */
+  public static native long getUsableSpace(String path);
+
+  /**
+   * Set the read permission of the file.
+   */
+  public static synchronized native boolean setReadable(String path,
+                                                        boolean readable,
+                                                        boolean ownerOnly);
+
+  /**
+   * Set the write permission of the file.
+   */
+  public static synchronized native boolean setWritable(String path,
+                                                        boolean writable,
+                                                        boolean ownerOnly);
+
+  /**
+   * Set the execute permission of the file.
+   */
+  public static synchronized native boolean setExecutable(String path,
+                                                          boolean executable,
+                                                          boolean ownerOnly);
+
+  /*
+   * This native method does the actual check of whether or not a file
+   * is a plain file or not.  It also handles the existence check to
+   * eliminate the overhead of a call to exists()
+   */
+  static native boolean isFile(String path);
+
+  /**
+   * This native method checks file permissions for writing
+   */
+  static synchronized native boolean canWrite(String path);
+
+  /**
+   * This methods checks if a directory can be written to.
+   */
+  static native boolean canWriteDirectory(String path);
+
+  /**
+   * This native method checks file permissions for reading
+   */
+  static synchronized native boolean canRead(String path);
+
+  /**
+   * This native method checks file permissions for execution
+   */
+  static synchronized native boolean canExecute(String path);
+
+  /*
+   * This method does the actual check of whether or not a file is a
+   * directory or not.  It also handle the existence check to eliminate
+   * the overhead of a call to exists()
+   */
+  static native boolean isDirectory(String dirpath);
+
+  /**
+   * This methods checks if a directory can be written to.
+   */
+  static boolean canWriteDirectory(File path)
+  {
+    return canWriteDirectory(path.getAbsolutePath());
+  }
+
+  /**
+   * This method returns an array of filesystem roots.  Some operating systems
+   * have volume oriented filesystem.  This method provides a mechanism for
+   * determining which volumes exist.  GNU systems use a single hierarchical
+   * filesystem, so will have only one "/" filesystem root.
+   *
+   * @return An array of <code>File</code> objects for each filesystem root
+   * available.
+   *
+   * @since 1.2
+   */
+  static File[] listRoots()
+  {
+        File[] roots = new File[1];
+        roots[0] = new File("/");
+        return roots;
+  }
+
+  /**
+   * This method tests whether or not this file represents a "hidden" file.
+   * On GNU systems, a file is hidden if its name begins with a "."
+   * character.  Files with these names are traditionally not shown with
+   * directory listing tools.
+   *
+   * @return <code>true</code> if the file is hidden, <code>false</code>
+   * otherwise.
+   *
+   * @since 1.2
+   */
+  static boolean isHidden(String path)
+  {
+        // FIXME: this only works on UNIX
+        return getName(path).startsWith(".");
+  }
+
+  /**
+   * This method returns the name of the file.  This is everything in the
+   * complete path of the file after the last instance of the separator
+   * string.
+   *
+   * @return The file name
+   */
+  static String getName(String path)
+  {
+        int pos = PlatformHelper.lastIndexOfSeparator(path);
+        if (pos == -1)
+          return path;
+
+        if (PlatformHelper.endWithSeparator(path))
+          return "";
+
+        return path.substring(pos + File.separator.length());
+  }
+
+  /**
+   * Returns the path as an absolute path name. The value returned is the
+   * current directory plus the separatory string plus the path of the file.
+   * The current directory is determined from the <code>user.dir</code> system
+   * property.
+   *
+   * @param path the path to convert to absolute path
+   *
+   * @return the absolute path that corresponds to <code>path</code>
+   */
+  static String getAbsolutePath(String path)
+  {
+    if (File.separatorChar == '\\'
+      && path.length() > 0 && path.charAt (0) == '\\')
+      {
+        // On Windows, even if the path starts with a '\\' it is not
+        // really absolute until we prefix the drive specifier from
+        // the current working directory to it.
+        return System.getProperty ("user.dir").substring (0, 2) + path;
+      }
+    else if (File.separatorChar == '\\'
+             && path.length() > 1 && path.charAt (1) == ':'
+             && ((path.charAt (0) >= 'a' && path.charAt (0) <= 'z')
+             || (path.charAt (0) >= 'A' && path.charAt (0) <= 'Z')))
+      {
+        // On Windows, a process has a current working directory for
+        // each drive and a path like "G:foo\bar" would mean the
+        // absolute path "G:\wombat\foo\bar" if "\wombat" is the
+        // working directory on the G drive.
+        String drvDir = null;
+        try
+          {
+            drvDir = new File (path.substring (0, 2)).getCanonicalPath();
+          }
+        catch (IOException e)
+          {
+            drvDir = path.substring (0, 2) + "\\";
+          }
+
+        // Note: this would return "C:\\." for the path "C:.", if "\"
+        // is the working folder on the C drive, but this is
+        // consistent with what Sun's JRE 1.4.1.01 actually returns!
+        if (path.length() > 2)
+          return drvDir + '\\' + path.substring (2, path.length());
+        else
+          return drvDir;
+      }
+    else if (path.equals(""))
+      return System.getProperty ("user.dir");
+    else
+      return System.getProperty ("user.dir") + File.separatorChar + path;
+  }
+
+  /**
+   * This method returns true if the path represents an absolute file
+   * path and false if it does not.  The definition of an absolute path varies
+   * by system.  As an example, on GNU systems, a path is absolute if it starts
+   * with a "/".
+   *
+   * @param path the path to check
+   *
+   * @return <code>true</code> if path represents an absolute file name,
+   *         <code>false</code> otherwise.
+   */
+  static boolean isAbsolute(String path)
+  {
+    if (File.separatorChar == '\\')
+        return path.startsWith(File.separator + File.separator)
+               || (path.length() > 2
+                   && ((path.charAt(0) >= 'a' && path.charAt(0) <= 'z')
+                       || (path.charAt(0) >= 'A' && path.charAt(0) <= 'Z'))
+                       && path.charAt(1) == ':'
+                       && path.charAt(2) == '\\');
+    else
+      return path.startsWith(File.separator);
+  }
+
+  /**
+   * Returns a <code>URL</code> with the <code>file:</code>
+   * protocol that represents this file.  The exact form of this URL is
+   * system dependent.
+   *
+   * @param file the file to convert to URL
+   *
+   * @return a <code>URL</code> for this object.
+   *
+   * @throws MalformedURLException if the URL cannot be created
+   *         successfully.
+   */
+  static URL toURL(File file)
+    throws MalformedURLException
+  {
+    // On Win32, Sun's JDK returns URLs of the form "file:/c:/foo/bar.txt",
+    // while on UNIX, it returns URLs of the form "file:/foo/bar.txt".
+    if (File.separatorChar == '\\')
+      return new URL ("file:/" + file.getAbsolutePath().replace ('\\', '/')
+                      + (file.isDirectory() ? "/" : ""));
+    else
+      return new URL ("file:" + file.getAbsolutePath()
+                      + (file.isDirectory() ? "/" : ""));
+  }
+
+   /**
+   * This method returns a canonical representation of the pathname of
+   * this file.  The actual form of the canonical representation is
+   * system-dependent.  On the GNU system, conversion to canonical
+   * form involves the removal of redundant separators, references to
+   * "." and "..", and symbolic links.
+   * <p>
+   * Note that this method, unlike the other methods which return path
+   * names, can throw an IOException.  This is because native method
+   * might be required in order to resolve the canonical path
+   *
+   * @exception IOException If an error occurs
+   */
+  public static native String toCanonicalForm(String path) throws IOException;
+}
diff --git a/libjava/classpath/vm/reference/java/io/VMObjectInputStream.java b/libjava/classpath/vm/reference/java/io/VMObjectInputStream.java
new file mode 100644
index 000000000..10e1f34cb
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/io/VMObjectInputStream.java
@@ -0,0 +1,64 @@
+/* ObjectInputStream.java -- Class used to read serialized objects
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005
+   Free Software Foundation, Inc.
+
+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 java.io;
+
+import gnu.classpath.Configuration;
+import java.lang.reflect.Constructor;
+
+final class VMObjectInputStream
+{
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javaio");
+      }
+  }
+
+  /**
+   * Allocates a new Object of type clazz but without running the
+   * default constructor on it. It then calls the given constructor on
+   * it. The given constructor method comes from the constr_clazz
+   * which is a super class of the given clazz.
+   */
+  static native Object allocateObject(Class clazz, Class constr_clazz,
+                                      Constructor constructor)
+    throws InstantiationException;
+}
diff --git a/libjava/classpath/vm/reference/java/io/VMObjectStreamClass.java b/libjava/classpath/vm/reference/java/io/VMObjectStreamClass.java
new file mode 100644
index 000000000..fbaf7d6c8
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/io/VMObjectStreamClass.java
@@ -0,0 +1,168 @@
+/* VMObjectStreamClass.java -- VM helper functions for ObjectStreamClass
+   Copyright (C) 2003, 2005  Free Software Foundation, Inc.
+
+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 java.io;
+
+import gnu.classpath.Configuration;
+import java.lang.reflect.Field;
+
+final class VMObjectStreamClass
+{
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javaio");
+      }
+  }
+
+  /**
+    * Returns true if CLAZZ has a static class initializer
+    * (a.k.a. <clinit>).
+    */
+  static native boolean hasClassInitializer (Class clazz);
+
+  /**
+   * Sets the value of the specified field. This method handles "double".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setDoubleNative(Field field, Object obj, double val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "float".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setFloatNative(Field field, Object obj, float val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "long".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setLongNative(Field field, Object obj, long val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "int".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setIntNative(Field field, Object obj, int val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "short".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setShortNative(Field field, Object obj, short val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "char".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setCharNative(Field field, Object obj, char val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "byte".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setByteNative(Field field, Object obj, byte val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "boolean".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setBooleanNative(Field field, Object obj, boolean val)
+    throws InternalError;
+
+  /**
+   * Sets the value of the specified field. This method handles "object".
+   * Warning ! The types are not truely checked here and final values may be
+   * assigned.
+   *
+   * @param field Field to set the value.
+   * @param obj Instance which will have its field set.
+   * @param val Value to put in the field.
+   */
+  static native void setObjectNative(Field field, Object obj, Object val)
+    throws InternalError;
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMClass.java b/libjava/classpath/vm/reference/java/lang/VMClass.java
new file mode 100644
index 000000000..a0091c073
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMClass.java
@@ -0,0 +1,469 @@
+/* VMClass.java -- VM Specific Class methods
+   Copyright (C) 2003, 2004, 2005, 2006 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 java.lang;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+/*
+ * This class is a reference version, mainly for compiling a class library
+ * jar.  It is likely that VM implementers replace this with their own
+ * version that can communicate effectively with the VM.
+ */
+
+/**
+ *
+ * @author Etienne Gagnon (etienne.gagnon@uqam.ca)
+ * @author Archie Cobbs (archie@dellroad.org)
+ * @author C. Brian Jones (cbj@gnu.org)
+ * @author Tom Tromey (tromey@cygnus.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ */
+final class VMClass
+{
+
+  // Only static methods. Cannot be instantiated.
+  private VMClass()
+  {
+  }
+
+  /**
+   * Discover whether an Object is an instance of this Class.  Think of it
+   * as almost like <code>o instanceof (this class)</code>.
+   *
+   * @param klass the Class object that's calling us
+   * @param o the Object to check
+   * @return whether o is an instance of this class
+   * @since 1.1
+   */
+  static native boolean isInstance(Class klass, Object o);
+
+  /**
+   * Discover whether an instance of the Class parameter would be an
+   * instance of this Class as well.  Think of doing
+   * <code>isInstance(c.newInstance())</code> or even
+   * <code>c.newInstance() instanceof (this class)</code>. While this
+   * checks widening conversions for objects, it must be exact for primitive
+   * types.
+   *
+   * @param klass the Class object that's calling us
+   * @param c the class to check
+   * @return whether an instance of c would be an instance of this class
+   *         as well
+   * @throws NullPointerException if c is null
+   * @since 1.1
+   */
+  static native boolean isAssignableFrom(Class klass, Class c);
+
+  /**
+   * Check whether this class is an interface or not.  Array types are not
+   * interfaces.
+   *
+   * @param klass the Class object that's calling us
+   * @return whether this class is an interface or not
+   */
+  static native boolean isInterface(Class klass);
+
+  /**
+   * Return whether this class is a primitive type.  A primitive type class
+   * is a class representing a kind of "placeholder" for the various
+   * primitive types, or void.  You can access the various primitive type
+   * classes through java.lang.Boolean.TYPE, java.lang.Integer.TYPE, etc.,
+   * or through boolean.class, int.class, etc.
+   *
+   * @param klass the Class object that's calling us
+   * @return whether this class is a primitive type
+   * @see Boolean#TYPE
+   * @see Byte#TYPE
+   * @see Character#TYPE
+   * @see Short#TYPE
+   * @see Integer#TYPE
+   * @see Long#TYPE
+   * @see Float#TYPE
+   * @see Double#TYPE
+   * @see Void#TYPE
+   * @since 1.1
+   */
+  static native boolean isPrimitive(Class klass);
+
+  /**
+   * Get the name of this class, separated by dots for package separators.
+   * Primitive types and arrays are encoded as:
+   * <pre>
+   * boolean             Z
+   * byte                B
+   * char                C
+   * short               S
+   * int                 I
+   * long                J
+   * float               F
+   * double              D
+   * void                V
+   * array type          [<em>element type</em>
+   * class or interface, alone: &lt;dotted name&gt;
+   * class or interface, as element type: L&lt;dotted name&gt;;
+   *
+   * @param klass the Class object that's calling us
+   * @return the name of this class
+   */
+  static native String getName(Class klass);
+
+  /**
+   * Get the direct superclass of this class.  If this is an interface,
+   * Object, a primitive type, or void, it will return null. If this is an
+   * array type, it will return Object.
+   *
+   * @param klass the Class object that's calling us
+   * @return the direct superclass of this class
+   */
+  static native Class getSuperclass(Class klass);
+
+  /**
+   * Get the interfaces this class <EM>directly</EM> implements, in the
+   * order that they were declared. This returns an empty array, not null,
+   * for Object, primitives, void, and classes or interfaces with no direct
+   * superinterface. Array types return Cloneable and Serializable.
+   *
+   * @param klass the Class object that's calling us
+   * @return the interfaces this class directly implements
+   */
+  static native Class[] getInterfaces(Class klass);
+
+  /**
+   * If this is an array, get the Class representing the type of array.
+   * Examples: "[[Ljava.lang.String;" would return "[Ljava.lang.String;", and
+   * calling getComponentType on that would give "java.lang.String".  If
+   * this is not an array, returns null.
+   *
+   * @param klass the Class object that's calling us
+   * @return the array type of this class, or null
+   * @see Array
+   * @since 1.1
+   */
+  static native Class getComponentType(Class klass);
+
+  /**
+   * Get the modifiers of this class.  These can be decoded using Modifier,
+   * and is limited to one of public, protected, or private, and any of
+   * final, static, abstract, or interface. An array class has the same
+   * public, protected, or private modifier as its component type, and is
+   * marked final but not an interface. Primitive types and void are marked
+   * public and final, but not an interface.
+   *
+   * @param klass the Class object that's calling us
+   * @param ignoreInnerClassesAttrib if set, return the real modifiers, not
+   * the ones specified in the InnerClasses attribute.
+   * @return the modifiers of this class
+   * @see Modifier
+   * @since 1.1
+   */
+  static native int getModifiers(Class klass, boolean ignoreInnerClassesAttrib);
+
+  /**
+   * If this is a nested or inner class, return the class that declared it.
+   * If not, return null.
+   *
+   * @param klass the Class object that's calling us
+   * @return the declaring class of this class
+   * @since 1.1
+   */
+  static native Class getDeclaringClass(Class klass);
+
+  /**
+   * Like <code>getDeclaredClasses()</code> but without the security checks.
+   *
+   * @param klass the Class object that's calling us
+   * @param publicOnly Only public classes should be returned
+   */
+  static native Class[] getDeclaredClasses(Class klass, boolean publicOnly);
+
+  /**
+   * Like <code>getDeclaredFields()</code> but without the security checks.
+   *
+   * @param klass the Class object that's calling us
+   * @param publicOnly Only public fields should be returned
+   */
+  static native Field[] getDeclaredFields(Class klass, boolean publicOnly);
+
+  /**
+   * Like <code>getDeclaredMethods()</code> but without the security checks.
+   *
+   * @param klass the Class object that's calling us
+   * @param publicOnly Only public methods should be returned
+   */
+  static native Method[] getDeclaredMethods(Class klass, boolean publicOnly);
+
+  /**
+   * Like <code>getDeclaredConstructors()</code> but without
+   * the security checks.
+   *
+   * @param klass the Class object that's calling us
+   * @param publicOnly Only public constructors should be returned
+   */
+  static native Constructor[] getDeclaredConstructors(Class klass, boolean publicOnly);
+
+  /**
+   * Return the class loader of this class.
+   *
+   * @param klass the Class object that's calling us
+   * @return the class loader
+   */
+  static native ClassLoader getClassLoader(Class klass);
+
+  /**
+   * Load the requested class and record the specified loader as the
+   * initiating class loader.
+   *
+   * @param name the name of the class to find
+   * @param initialize should the class initializer be run?
+   * @param loader the class loader to use (or null for the bootstrap loader)
+   * @return the Class object representing the class or null for noop
+   * @throws ClassNotFoundException if the class was not found by the
+   *         class loader
+   * @throws LinkageError if linking the class fails
+   * @throws ExceptionInInitializerError if the class loads, but an exception
+   *         occurs during initialization
+   */
+  static native Class forName(String name, boolean initialize,
+                              ClassLoader loader)
+    throws ClassNotFoundException;
+
+  /**
+   * Return whether this class is an array type.
+   *
+   * @param klass the Class object that's calling us
+   * @return true if this class is an array type
+   * operation
+   */
+  static native boolean isArray(Class klass);
+
+  /**
+   * Throw a checked exception without declaring it.
+   */
+  static native void throwException(Throwable t);
+
+  /**
+   * Returns the simple name for the specified class, as used in the source
+   * code.  For normal classes, this is the content returned by
+   * <code>getName()</code> which follows the last ".".  Anonymous
+   * classes have no name, and so the result of calling this method is
+   * "".  The simple name of an array consists of the simple name of
+   * its component type, followed by "[]".  Thus, an array with the
+   * component type of an anonymous class has a simple name of simply
+   * "[]".
+   *
+   * @param klass the class whose simple name should be returned.
+   * @return the simple name for this class.
+   */
+  static String getSimpleName(Class klass)
+  {
+    if (isAnonymousClass(klass))
+      return "";
+    if (isArray(klass))
+      {
+        return getComponentType(klass).getSimpleName() + "[]";
+      }
+    String fullName = getName(klass);
+    int pos = fullName.lastIndexOf("$");
+    if (pos == -1)
+      pos = 0;
+    else
+      {
+        ++pos;
+        while (Character.isDigit(fullName.charAt(pos)))
+          ++pos;
+      }
+    int packagePos = fullName.lastIndexOf(".", pos);
+    if (packagePos == -1)
+      return fullName.substring(pos);
+    else
+      return fullName.substring(packagePos + 1);
+  }
+
+  /**
+   * Returns all annotations directly defined by the specified class.  If
+   * there are no annotations associated with this class, then a zero-length
+   * array will be returned.  The returned array may be modified by the client
+   * code, but this will have no effect on the annotation content of this
+   * class, and hence no effect on the return value of this method for
+   * future callers.
+   *
+   * @param klass the class whose annotations should be returned.
+   * @return the annotations directly defined by the specified class.
+   * @since 1.5
+   */
+  static native Annotation[] getDeclaredAnnotations(Class klass);
+
+  /**
+   * <p>
+   * Returns the canonical name of the specified class, as defined by section
+   * 6.7 of the Java language specification.  Each package, top-level class,
+   * top-level interface and primitive type has a canonical name.  A member
+   * class has a canonical name, if its parent class has one.  Likewise,
+   * an array type has a canonical name, if its component type does.
+   * Local or anonymous classes do not have canonical names.
+   * </p>
+   * <p>
+   * The canonical name for top-level classes, top-level interfaces and
+   * primitive types is always the same as the fully-qualified name.
+   * For array types, the canonical name is the canonical name of its
+   * component type with `[]' appended.
+   * </p>
+   * <p>
+   * The canonical name of a member class always refers to the place where
+   * the class was defined, and is composed of the canonical name of the
+   * defining class and the simple name of the member class, joined by `.'.
+   *  For example, if a <code>Person</code> class has an inner class,
+   * <code>M</code>, then both its fully-qualified name and canonical name
+   * is <code>Person.M</code>.  A subclass, <code>Staff</code>, of
+   * <code>Person</code> refers to the same inner class by the fully-qualified
+   * name of <code>Staff.M</code>, but its canonical name is still
+   * <code>Person.M</code>.
+   * </p>
+   * <p>
+   * Where no canonical name is present, <code>null</code> is returned.
+   * </p>
+   *
+   * @param klass the class whose canonical name should be retrieved.
+   * @return the canonical name of the class, or <code>null</code> if the
+   *         class doesn't have a canonical name.
+   * @since 1.5
+   */
+  static String getCanonicalName(Class klass)
+  {
+    if (isLocalClass(klass) || isAnonymousClass(klass))
+      return null;
+    if (isArray(klass))
+      {
+        String componentName = getComponentType(klass).getCanonicalName();
+        if (componentName != null)
+          return componentName + "[]";
+      }
+    if (isMemberClass(klass))
+      {
+        String memberName = getDeclaringClass(klass).getCanonicalName();
+        if (memberName != null)
+          return memberName + "." + getSimpleName(klass);
+        else
+          return memberName;
+      }
+    return getName(klass);
+  }
+
+  /**
+   * Returns the class which immediately encloses the specified class.  If
+   * the class is a top-level class, this method returns <code>null</code>.
+   *
+   * @param klass the class whose enclosing class should be returned.
+   * @return the immediate enclosing class, or <code>null</code> if this is
+   *         a top-level class.
+   * @since 1.5
+   */
+  static native Class getEnclosingClass(Class klass);
+
+  /**
+   * Returns the constructor which immediately encloses the specified class.
+   * If the class is a top-level class, or a local or anonymous class
+   * immediately enclosed by a type definition, instance initializer
+   * or static initializer, then <code>null</code> is returned.
+   *
+   * @param klass the class whose enclosing constructor should be returned.
+   * @return the immediate enclosing constructor if the specified class is
+   *         declared within a constructor.  Otherwise, <code>null</code>
+   *         is returned.
+   * @since 1.5
+   */
+  static native Constructor getEnclosingConstructor(Class klass);
+
+  /**
+   * Returns the method which immediately encloses the specified class.  If
+   * the class is a top-level class, or a local or anonymous class
+   * immediately enclosed by a type definition, instance initializer
+   * or static initializer, then <code>null</code> is returned.
+   *
+   * @param klass the class whose enclosing method should be returned.
+   * @return the immediate enclosing method if the specified class is
+   *         declared within a method.  Otherwise, <code>null</code>
+   *         is returned.
+   * @since 1.5
+   */
+  static native Method getEnclosingMethod(Class klass);
+
+  /**
+   * Returns the class signature as specified in Class File Format
+   * chapter in the VM specification, or null if the class is not
+   * generic.
+   *
+   * @param klass the klass to test.
+   * @return a ClassSignature string.
+   * @since 1.5
+   */
+  static native String getClassSignature(Class klass);
+
+  /**
+   * Returns true if the specified class represents an anonymous class.
+   *
+   * @param klass the klass to test.
+   * @return true if the specified class represents an anonymous class.
+   * @since 1.5
+   */
+  static native boolean isAnonymousClass(Class klass);
+
+  /**
+   * Returns true if the specified class represents an local class.
+   *
+   * @param klass the klass to test.
+   * @return true if the specified class represents an local class.
+   * @since 1.5
+   */
+  static native boolean isLocalClass(Class klass);
+
+  /**
+   * Returns true if the specified class represents an member class.
+   *
+   * @param klass the klass to test.
+   * @return true if the specified class represents an member class.
+   * @since 1.5
+   */
+  static native boolean isMemberClass(Class klass);
+
+} // class VMClass
diff --git a/libjava/classpath/vm/reference/java/lang/VMClassLoader.java b/libjava/classpath/vm/reference/java/lang/VMClassLoader.java
new file mode 100644
index 000000000..c1d462588
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMClassLoader.java
@@ -0,0 +1,431 @@
+/* VMClassLoader.java -- Reference implementation of native interface
+   required by ClassLoader
+   Copyright (C) 1998, 2001, 2002, 2004, 2005, 2006 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 java.lang;
+
+import gnu.classpath.Configuration;
+import gnu.classpath.SystemProperties;
+import gnu.java.lang.InstrumentationImpl;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.instrument.Instrumentation;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.ProtectionDomain;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringTokenizer;
+import java.util.Vector;
+import java.util.zip.ZipFile;
+
+/**
+ * java.lang.VMClassLoader is a package-private helper for VMs to implement
+ * on behalf of java.lang.ClassLoader.
+ *
+ * @author John Keiser
+ * @author Mark Wielaard (mark@klomp.org)
+ * @author Eric Blake (ebb9@email.byu.edu)
+ */
+final class VMClassLoader
+{
+
+
+  /** packages loaded by the bootstrap class loader */
+  static final HashMap definedPackages = new HashMap();
+
+  /** jars from property java.boot.class.path */
+  static final HashMap bootjars = new HashMap();
+
+
+  /**
+   * Converts the array string of native package names to
+   * Packages. The packages are then put into the
+   * definedPackages hashMap
+   */
+  static
+  {
+    String[] packages = getBootPackages();
+
+    if( packages != null)
+      {
+        String specName =
+              SystemProperties.getProperty("java.specification.name");
+        String vendor =
+              SystemProperties.getProperty("java.specification.vendor");
+        String version =
+              SystemProperties.getProperty("java.specification.version");
+
+        Package p;
+
+        for(int i = 0; i < packages.length; i++)
+          {
+            p = new Package(packages[i],
+                  specName,
+                  vendor,
+                  version,
+                  "GNU Classpath",
+                  "GNU",
+                  Configuration.CLASSPATH_VERSION,
+                  null,
+                  null);
+
+            definedPackages.put(packages[i], p);
+          }
+      }
+  }
+
+
+  /**
+   * Helper to define a class using a string of bytes. This assumes that
+   * the security checks have already been performed, if necessary.
+   *
+   * Implementations of this method are advised to consider the
+   * situation where user code modifies the byte array after it has
+   * been passed to defineClass.  This can be handled by making a
+   * private copy of the array, or arranging to only read any given
+   * byte a single time.
+   *
+   * @param name the name to give the class, or null if unknown
+   * @param data the data representing the classfile, in classfile format
+   * @param offset the offset into the data where the classfile starts
+   * @param len the length of the classfile data in the array
+   * @param pd the protection domain
+   * @return the class that was defined
+   * @throws ClassFormatError if data is not in proper classfile format
+   */
+  static final native Class defineClass(ClassLoader cl, String name,
+                                 byte[] data, int offset, int len,
+                                 ProtectionDomain pd)
+    throws ClassFormatError;
+
+  /**
+   * Helper to resolve all references to other classes from this class.
+   *
+   * @param c the class to resolve
+   */
+  static final native void resolveClass(Class c);
+
+  /**
+   * Helper to load a class from the bootstrap class loader.
+   *
+   * @param name the class name to load
+   * @param resolve whether to resolve it
+   * @return the class, loaded by the bootstrap classloader or null
+   * if the class wasn't found. Returning null is equivalent to throwing
+   * a ClassNotFoundException (but a possible performance optimization).
+   */
+  static final native Class loadClass(String name, boolean resolve)
+    throws ClassNotFoundException;
+
+  /**
+   * Helper to load a resource from the bootstrap class loader.
+   *
+   * @param name the resource to find
+   * @return the URL to the resource
+   */
+  static URL getResource(String name)
+  {
+    Enumeration e = getResources(name);
+    if (e.hasMoreElements())
+      return (URL)e.nextElement();
+    return null;
+  }
+  /**
+   * Helper to get a list of resources from the bootstrap class loader.
+   *
+   * @param name the resource to find
+   * @return an enumeration of resources
+   */
+  static Enumeration getResources(String name)
+  {
+    StringTokenizer st = new StringTokenizer(
+      SystemProperties.getProperty("java.boot.class.path", "."),
+      File.pathSeparator);
+    Vector v = new Vector();
+    while (st.hasMoreTokens())
+      {
+        File file = new File(st.nextToken());
+        if (file.isDirectory())
+          {
+            try
+              {
+                File f = new File(file, name);
+                if (!f.exists()) continue;
+                v.add(new URL("file://" + f.getAbsolutePath()));
+              }
+            catch (MalformedURLException e)
+              {
+                throw new Error(e);
+              }
+          }
+        else if (file.isFile())
+          {
+            ZipFile zip;
+            synchronized(bootjars)
+              {
+                zip = (ZipFile) bootjars.get(file.getName());
+              }
+            if(zip == null)
+              {
+                try
+                  {
+                    zip = new ZipFile(file);
+                    synchronized(bootjars)
+                      {
+                        bootjars.put(file.getName(), zip);
+                      }
+                  }
+                catch (IOException e)
+                  {
+                    continue;
+                  }
+              }
+            String zname = name.startsWith("/") ? name.substring(1) : name;
+            if (zip.getEntry(zname) == null)
+              continue;
+            try
+              {
+                v.add(new URL("jar:file://"
+                  + file.getAbsolutePath() + "!/" + zname));
+              }
+            catch (MalformedURLException e)
+              {
+                throw new Error(e);
+              }
+          }
+      }
+    return v.elements();
+  }
+
+
+  /**
+   * Returns a String[] of native package names. The default
+   * implementation tries to load a list of package from
+   * the META-INF/INDEX.LIST file in the boot jar file.
+   * If not found or if any exception is raised, it returns
+   * an empty array. You may decide this needs native help.
+   */
+  private static String[] getBootPackages()
+  {
+    URL indexList = getResource("META-INF/INDEX.LIST");
+    if (indexList != null)
+      {
+        try
+          {
+            Set packageSet = new HashSet();
+            String line;
+            int lineToSkip = 3;
+            BufferedReader reader = new BufferedReader(
+                                                       new InputStreamReader(
+                                                                             indexList.openStream()));
+            while ((line = reader.readLine()) != null)
+              {
+                if (lineToSkip == 0)
+                  {
+                    if (line.length() == 0)
+                      lineToSkip = 1;
+                    else
+                      packageSet.add(line.replace('/', '.'));
+                  }
+                else
+                  lineToSkip--;
+              }
+            reader.close();
+            return (String[]) packageSet.toArray(new String[packageSet.size()]);
+          }
+        catch (IOException e)
+          {
+            return new String[0];
+          }
+      }
+    else
+      return new String[0];
+  }
+
+
+  /**
+   * Helper to get a package from the bootstrap class loader.
+   *
+   * @param name the name to find
+   * @return the named package, if it exists
+   */
+  static Package getPackage(String name)
+  {
+    return (Package)definedPackages.get(name);
+  }
+
+
+
+  /**
+   * Helper to get all packages from the bootstrap class loader.
+   *
+   * @return all named packages, if any exist
+   */
+  static Package[] getPackages()
+  {
+    Package[] packages = new Package[definedPackages.size()];
+    definedPackages.values().toArray(packages);
+    return packages;
+  }
+
+  /**
+   * Helper for java.lang.Integer, Byte, etc to get the TYPE class
+   * at initialization time. The type code is one of the chars that
+   * represents the primitive type as in JNI.
+   *
+   * <ul>
+   * <li>'Z' - boolean</li>
+   * <li>'B' - byte</li>
+   * <li>'C' - char</li>
+   * <li>'D' - double</li>
+   * <li>'F' - float</li>
+   * <li>'I' - int</li>
+   * <li>'J' - long</li>
+   * <li>'S' - short</li>
+   * <li>'V' - void</li>
+   * </ul>
+   *
+   * @param type the primitive type
+   * @return a "bogus" class representing the primitive type
+   */
+  static final native Class getPrimitiveClass(char type);
+
+  /**
+   * The system default for assertion status. This is used for all system
+   * classes (those with a null ClassLoader), as well as the initial value for
+   * every ClassLoader's default assertion status.
+   *
+   * XXX - Not implemented yet; this requires native help.
+   *
+   * @return the system-wide default assertion status
+   */
+  static final boolean defaultAssertionStatus()
+  {
+    return true;
+  }
+
+  /**
+   * The system default for package assertion status. This is used for all
+   * ClassLoader's packageAssertionStatus defaults. It must be a map of
+   * package names to Boolean.TRUE or Boolean.FALSE, with the unnamed package
+   * represented as a null key.
+   *
+   * XXX - Not implemented yet; this requires native help.
+   *
+   * @return a (read-only) map for the default packageAssertionStatus
+   */
+  static final Map packageAssertionStatus()
+  {
+    return new HashMap();
+  }
+
+  /**
+   * The system default for class assertion status. This is used for all
+   * ClassLoader's classAssertionStatus defaults. It must be a map of
+   * class names to Boolean.TRUE or Boolean.FALSE
+   *
+   * XXX - Not implemented yet; this requires native help.
+   *
+   * @return a (read-only) map for the default classAssertionStatus
+   */
+  static final Map classAssertionStatus()
+  {
+    return new HashMap();
+  }
+
+  static ClassLoader getSystemClassLoader()
+  {
+    return ClassLoader.defaultGetSystemClassLoader();
+  }
+
+  /**
+   * Find the class if this class loader previously defined this class
+   * or if this class loader has been recorded as the initiating class loader
+   * for this class.
+   */
+  static native Class findLoadedClass(ClassLoader cl, String name);
+
+  /**
+   * The Instrumentation object created by the vm when agents are defined.
+   */
+  static final Instrumentation instrumenter = null;
+
+  /**
+   * Call the transformers of the possible Instrumentation object. This
+   * implementation assumes the instrumenter is a
+   * <code>InstrumentationImpl</code> object. VM implementors would
+   * have to redefine this method if they provide their own implementation
+   * of the <code>Instrumentation</code> interface.
+   *
+   * @param loader the initiating loader
+   * @param name the name of the class
+   * @param data the data representing the classfile, in classfile format
+   * @param offset the offset into the data where the classfile starts
+   * @param len the length of the classfile data in the array
+   * @param pd the protection domain
+   * @return the new data representing the classfile
+   */
+  static final Class defineClassWithTransformers(ClassLoader loader,
+      String name, byte[] data, int offset, int len, ProtectionDomain pd)
+  {
+
+    if (instrumenter != null)
+      {
+        byte[] modifiedData = new byte[len];
+        System.arraycopy(data, offset, modifiedData, 0, len);
+        String jvmName = name.replace('.', '/');
+        modifiedData =
+          ((InstrumentationImpl)instrumenter).callTransformers(loader, jvmName,
+            null, pd, modifiedData);
+
+        return defineClass(loader, name, modifiedData, 0, modifiedData.length,
+            pd);
+      }
+    else
+      {
+        return defineClass(loader, name, data, offset, len, pd);
+      }
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMCompiler.java b/libjava/classpath/vm/reference/java/lang/VMCompiler.java
new file mode 100644
index 000000000..fe7400756
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMCompiler.java
@@ -0,0 +1,112 @@
+/* VMClassLoader.java -- Reference implementation of compiler interface
+   Copyright (C) 2004 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 java.lang;
+
+/**
+ * This class is just a per-VM reflection of java.lang.Compiler.
+ * All methods are defined identically.
+ */
+final class VMCompiler
+{
+  /**
+   * Don't allow new `Compiler's to be made.
+   */
+  private VMCompiler()
+  {
+  }
+
+  /**
+   * Compile the class named by <code>oneClass</code>.
+   *
+   * @param oneClass the class to compile
+   * @return <code>false</code> if no compiler is available or
+   *         compilation failed, <code>true</code> if compilation succeeded
+   * @throws NullPointerException if oneClass is null
+   */
+  public static boolean compileClass(Class oneClass)
+  {
+    // Never succeed.
+    return false;
+  }
+
+  /**
+   * Compile the classes whose name matches <code>classNames</code>.
+   *
+   * @param classNames the name of classes to compile
+   * @return <code>false</code> if no compiler is available or
+   *         compilation failed, <code>true</code> if compilation succeeded
+   * @throws NullPointerException if classNames is null
+   */
+  public static boolean compileClasses(String classNames)
+  {
+    // Note the incredibly lame interface.  Always fail.
+    return false;
+  }
+
+  /**
+   * This method examines the argument and performs an operation
+   * according to the compilers documentation.  No specific operation
+   * is required.
+   *
+   * @param arg a compiler-specific argument
+   * @return a compiler-specific value, including null
+   * @throws NullPointerException if the compiler doesn't like a null arg
+   */
+  public static Object command(Object arg)
+  {
+    // Our implementation defines this to a no-op.
+    return null;
+  }
+
+  /**
+   * Calling <code>Compiler.enable()</code> will cause the compiler
+   * to resume operation if it was previously disabled; provided that a
+   * compiler even exists.
+   */
+  public static void enable()
+  {
+  }
+
+  /**
+   * Calling <code>Compiler.disable()</code> will cause the compiler
+   * to be suspended; provided that a compiler even exists.
+   */
+  public static void disable()
+  {
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMDouble.java b/libjava/classpath/vm/reference/java/lang/VMDouble.java
new file mode 100644
index 000000000..8e523cd2e
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMDouble.java
@@ -0,0 +1,115 @@
+/* VMDouble.java -- VM Specific Double methods
+   Copyright (C) 2003, 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 java.lang;
+
+import gnu.classpath.Configuration;
+
+/*
+ * This class is a reference version, mainly for compiling a class library
+ * jar.  It is likely that VM implementers replace this with their own
+ * version that can communicate effectively with the VM.
+ */
+
+/**
+ * Code relocated from java.lang.Double by
+ * @author Dave Grove (groved@us.ibm.com)
+ */
+final class VMDouble
+{
+
+  /**
+   * Load native routines necessary for this class.
+   */
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javalang");
+      }
+
+    initIDs();
+  }
+
+  /**
+   * Convert the double to the IEEE 754 floating-point "double format" bit
+   * layout. Bit 63 (the most significant) is the sign bit, bits 62-52
+   * (masked by 0x7ff0000000000000L) represent the exponent, and bits 51-0
+   * (masked by 0x000fffffffffffffL) are the mantissa. This function
+   * leaves NaN alone, rather than collapsing to a canonical value. The
+   * result of this function can be used as the argument to
+   * <code>Double.longBitsToDouble(long)</code> to obtain the original
+   * <code>double</code> value.
+   *
+   * @param value the <code>double</code> to convert
+   * @return the bits of the <code>double</code>
+   * @see #longBitsToDouble(long)
+   */
+  public static native long doubleToRawLongBits(double value);
+
+  /**
+   * Convert the argument in IEEE 754 floating-point "double format" bit
+   * layout to the corresponding float. Bit 63 (the most significant) is the
+   * sign bit, bits 62-52 (masked by 0x7ff0000000000000L) represent the
+   * exponent, and bits 51-0 (masked by 0x000fffffffffffffL) are the mantissa.
+   * This function leaves NaN alone, so that you can recover the bit pattern
+   * with <code>Double.doubleToRawLongBits(double)</code>.
+   *
+   * @param bits the bits to convert
+   * @return the <code>double</code> represented by the bits
+   * @see #doubleToLongBits(double)
+   * @see #doubleToRawLongBits(double)
+   */
+  public static native double longBitsToDouble(long bits);
+
+  /**
+   * Helper method to convert to string.
+   *
+   * @param d the double to convert
+   * @param isFloat true if the conversion is requested by Float (results in
+   *        fewer digits)
+   */
+  public static native String toString(double d, boolean isFloat);
+
+  /**
+   * Initialize JNI cache.  This method is called only by the
+   * static initializer when using JNI.
+   */
+  public static native void initIDs();
+
+  public static native double parseDouble(String str);
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMFloat.java b/libjava/classpath/vm/reference/java/lang/VMFloat.java
new file mode 100644
index 000000000..ba523d697
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMFloat.java
@@ -0,0 +1,118 @@
+/* VMFloat.java -- VM Specific Float methods
+   Copyright (C) 2003 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 java.lang;
+
+import gnu.classpath.Configuration;
+
+/*
+ * This class is a reference version, mainly for compiling a class library
+ * jar.  It is likely that VM implementers replace this with their own
+ * version that can communicate effectively with the VM.
+ */
+
+/**
+ * Code relocated from java.lang.Float by
+ * @author Dave Grove <groved@us.ibm.com>
+ */
+final class VMFloat
+{
+
+  /**
+   * Load native routines necessary for this class.
+   */
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javalang");
+      }
+  }
+
+  /**
+   * Convert the float to the IEEE 754 floating-point "single format" bit
+   * layout. Bit 31 (the most significant) is the sign bit, bits 30-23
+   * (masked by 0x7f800000) represent the exponent, and bits 22-0
+   * (masked by 0x007fffff) are the mantissa. This function leaves NaN alone,
+   * rather than collapsing to a canonical value. The result of this function
+   * can be used as the argument to <code>Float.intBitsToFloat(int)</code> to
+   * obtain the original <code>float</code> value.
+   *
+   * @param value the <code>float</code> to convert
+   * @return the bits of the <code>float</code>
+   * @see #intBitsToFloat(int)
+   */
+  static native int floatToRawIntBits(float value);
+
+  /**
+   * Convert the argument in IEEE 754 floating-point "single format" bit
+   * layout to the corresponding float. Bit 31 (the most significant) is the
+   * sign bit, bits 30-23 (masked by 0x7f800000) represent the exponent, and
+   * bits 22-0 (masked by 0x007fffff) are the mantissa. This function leaves
+   * NaN alone, so that you can recover the bit pattern with
+   * <code>Float.floatToRawIntBits(float)</code>.
+   *
+   * @param bits the bits to convert
+   * @return the <code>float</code> represented by the bits
+   * @see #floatToIntBits(float)
+   * @see #floatToRawIntBits(float)
+   */
+  static native float intBitsToFloat(int bits);
+
+  /**
+   * @param f the <code>float</code> to convert
+   * @return the <code>String</code> representing the <code>float</code>
+   */
+  static String toString(float f)
+  {
+    return VMDouble.toString(f, true);
+  }
+
+  /**
+   * @param str the <code>String</code> to convert
+   * @return the <code>float</code> value of <code>s</code>
+   * @throws NumberFormatException if <code>str</code> cannot be parsed as a
+   *         <code>float</code>
+   * @throws NullPointerException if <code>str</code> is null
+   */
+  static float parseFloat(String str)
+  {
+    // XXX Rounding parseDouble() causes some errors greater than 1 ulp from
+    // the infinitely precise decimal.
+    return (float) Double.parseDouble(str);
+  }
+} // class VMFloat
diff --git a/libjava/classpath/vm/reference/java/lang/VMMath.java b/libjava/classpath/vm/reference/java/lang/VMMath.java
new file mode 100644
index 000000000..dc5fd4207
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMMath.java
@@ -0,0 +1,493 @@
+/* VMMath.java -- Common mathematical functions.
+   Copyright (C) 2006  Free Software Foundation, Inc.
+
+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 java.lang;
+
+import gnu.classpath.Configuration;
+
+class VMMath
+{
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javalang");
+      }
+  }
+
+  /**
+   * The trigonometric function <em>sin</em>. The sine of NaN or infinity is
+   * NaN, and the sine of 0 retains its sign. This is accurate within 1 ulp,
+   * and is semi-monotonic.
+   *
+   * @param a the angle (in radians)
+   * @return sin(a)
+   */
+  public static native double sin(double a);
+
+  /**
+   * The trigonometric function <em>cos</em>. The cosine of NaN or infinity is
+   * NaN. This is accurate within 1 ulp, and is semi-monotonic.
+   *
+   * @param a the angle (in radians)
+   * @return cos(a)
+   */
+  public static native double cos(double a);
+
+  /**
+   * The trigonometric function <em>tan</em>. The tangent of NaN or infinity
+   * is NaN, and the tangent of 0 retains its sign. This is accurate within 1
+   * ulp, and is semi-monotonic.
+   *
+   * @param a the angle (in radians)
+   * @return tan(a)
+   */
+  public static native double tan(double a);
+
+  /**
+   * The trigonometric function <em>arcsin</em>. The range of angles returned
+   * is -pi/2 to pi/2 radians (-90 to 90 degrees). If the argument is NaN or
+   * its absolute value is beyond 1, the result is NaN; and the arcsine of
+   * 0 retains its sign. This is accurate within 1 ulp, and is semi-monotonic.
+   *
+   * @param a the sin to turn back into an angle
+   * @return arcsin(a)
+   */
+  public static native double asin(double a);
+
+  /**
+   * The trigonometric function <em>arccos</em>. The range of angles returned
+   * is 0 to pi radians (0 to 180 degrees). If the argument is NaN or
+   * its absolute value is beyond 1, the result is NaN. This is accurate
+   * within 1 ulp, and is semi-monotonic.
+   *
+   * @param a the cos to turn back into an angle
+   * @return arccos(a)
+   */
+  public static native double acos(double a);
+
+  /**
+   * The trigonometric function <em>arcsin</em>. The range of angles returned
+   * is -pi/2 to pi/2 radians (-90 to 90 degrees). If the argument is NaN, the
+   * result is NaN; and the arctangent of 0 retains its sign. This is accurate
+   * within 1 ulp, and is semi-monotonic.
+   *
+   * @param a the tan to turn back into an angle
+   * @return arcsin(a)
+   * @see #atan2(double, double)
+   */
+  public static native double atan(double a);
+
+  /**
+   * A special version of the trigonometric function <em>arctan</em>, for
+   * converting rectangular coordinates <em>(x, y)</em> to polar
+   * <em>(r, theta)</em>. This computes the arctangent of x/y in the range
+   * of -pi to pi radians (-180 to 180 degrees). Special cases:<ul>
+   * <li>If either argument is NaN, the result is NaN.</li>
+   * <li>If the first argument is positive zero and the second argument is
+   * positive, or the first argument is positive and finite and the second
+   * argument is positive infinity, then the result is positive zero.</li>
+   * <li>If the first argument is negative zero and the second argument is
+   * positive, or the first argument is negative and finite and the second
+   * argument is positive infinity, then the result is negative zero.</li>
+   * <li>If the first argument is positive zero and the second argument is
+   * negative, or the first argument is positive and finite and the second
+   * argument is negative infinity, then the result is the double value
+   * closest to pi.</li>
+   * <li>If the first argument is negative zero and the second argument is
+   * negative, or the first argument is negative and finite and the second
+   * argument is negative infinity, then the result is the double value
+   * closest to -pi.</li>
+   * <li>If the first argument is positive and the second argument is
+   * positive zero or negative zero, or the first argument is positive
+   * infinity and the second argument is finite, then the result is the
+   * double value closest to pi/2.</li>
+   * <li>If the first argument is negative and the second argument is
+   * positive zero or negative zero, or the first argument is negative
+   * infinity and the second argument is finite, then the result is the
+   * double value closest to -pi/2.</li>
+   * <li>If both arguments are positive infinity, then the result is the
+   * double value closest to pi/4.</li>
+   * <li>If the first argument is positive infinity and the second argument
+   * is negative infinity, then the result is the double value closest to
+   * 3*pi/4.</li>
+   * <li>If the first argument is negative infinity and the second argument
+   * is positive infinity, then the result is the double value closest to
+   * -pi/4.</li>
+   * <li>If both arguments are negative infinity, then the result is the
+   * double value closest to -3*pi/4.</li>
+   *
+   * </ul><p>This is accurate within 2 ulps, and is semi-monotonic. To get r,
+   * use sqrt(x*x+y*y).
+   *
+   * @param y the y position
+   * @param x the x position
+   * @return <em>theta</em> in the conversion of (x, y) to (r, theta)
+   * @see #atan(double)
+   */
+  public static native double atan2(double y, double x);
+
+  /**
+   * Take <em>e</em><sup>a</sup>.  The opposite of <code>log()</code>. If the
+   * argument is NaN, the result is NaN; if the argument is positive infinity,
+   * the result is positive infinity; and if the argument is negative
+   * infinity, the result is positive zero. This is accurate within 1 ulp,
+   * and is semi-monotonic.
+   *
+   * @param a the number to raise to the power
+   * @return the number raised to the power of <em>e</em>
+   * @see #log(double)
+   * @see #pow(double, double)
+   */
+  public static native double exp(double a);
+
+  /**
+   * Take ln(a) (the natural log).  The opposite of <code>exp()</code>. If the
+   * argument is NaN or negative, the result is NaN; if the argument is
+   * positive infinity, the result is positive infinity; and if the argument
+   * is either zero, the result is negative infinity. This is accurate within
+   * 1 ulp, and is semi-monotonic.
+   *
+   * <p>Note that the way to get log<sub>b</sub>(a) is to do this:
+   * <code>ln(a) / ln(b)</code>.
+   *
+   * @param a the number to take the natural log of
+   * @return the natural log of <code>a</code>
+   * @see #exp(double)
+   */
+  public static native double log(double a);
+
+  /**
+   * Take a square root. If the argument is NaN or negative, the result is
+   * NaN; if the argument is positive infinity, the result is positive
+   * infinity; and if the result is either zero, the result is the same.
+   * This is accurate within the limits of doubles.
+   *
+   * <p>For other roots, use pow(a, 1 / rootNumber).
+   *
+   * @param a the numeric argument
+   * @return the square root of the argument
+   * @see #pow(double, double)
+   */
+  public static native double sqrt(double a);
+
+  /**
+   * Raise a number to a power. Special cases:<ul>
+   * <li>If the second argument is positive or negative zero, then the result
+   * is 1.0.</li>
+   * <li>If the second argument is 1.0, then the result is the same as the
+   * first argument.</li>
+   * <li>If the second argument is NaN, then the result is NaN.</li>
+   * <li>If the first argument is NaN and the second argument is nonzero,
+   * then the result is NaN.</li>
+   * <li>If the absolute value of the first argument is greater than 1 and
+   * the second argument is positive infinity, or the absolute value of the
+   * first argument is less than 1 and the second argument is negative
+   * infinity, then the result is positive infinity.</li>
+   * <li>If the absolute value of the first argument is greater than 1 and
+   * the second argument is negative infinity, or the absolute value of the
+   * first argument is less than 1 and the second argument is positive
+   * infinity, then the result is positive zero.</li>
+   * <li>If the absolute value of the first argument equals 1 and the second
+   * argument is infinite, then the result is NaN.</li>
+   * <li>If the first argument is positive zero and the second argument is
+   * greater than zero, or the first argument is positive infinity and the
+   * second argument is less than zero, then the result is positive zero.</li>
+   * <li>If the first argument is positive zero and the second argument is
+   * less than zero, or the first argument is positive infinity and the
+   * second argument is greater than zero, then the result is positive
+   * infinity.</li>
+   * <li>If the first argument is negative zero and the second argument is
+   * greater than zero but not a finite odd integer, or the first argument is
+   * negative infinity and the second argument is less than zero but not a
+   * finite odd integer, then the result is positive zero.</li>
+   * <li>If the first argument is negative zero and the second argument is a
+   * positive finite odd integer, or the first argument is negative infinity
+   * and the second argument is a negative finite odd integer, then the result
+   * is negative zero.</li>
+   * <li>If the first argument is negative zero and the second argument is
+   * less than zero but not a finite odd integer, or the first argument is
+   * negative infinity and the second argument is greater than zero but not a
+   * finite odd integer, then the result is positive infinity.</li>
+   * <li>If the first argument is negative zero and the second argument is a
+   * negative finite odd integer, or the first argument is negative infinity
+   * and the second argument is a positive finite odd integer, then the result
+   * is negative infinity.</li>
+   * <li>If the first argument is less than zero and the second argument is a
+   * finite even integer, then the result is equal to the result of raising
+   * the absolute value of the first argument to the power of the second
+   * argument.</li>
+   * <li>If the first argument is less than zero and the second argument is a
+   * finite odd integer, then the result is equal to the negative of the
+   * result of raising the absolute value of the first argument to the power
+   * of the second argument.</li>
+   * <li>If the first argument is finite and less than zero and the second
+   * argument is finite and not an integer, then the result is NaN.</li>
+   * <li>If both arguments are integers, then the result is exactly equal to
+   * the mathematical result of raising the first argument to the power of
+   * the second argument if that result can in fact be represented exactly as
+   * a double value.</li>
+   *
+   * </ul><p>(In the foregoing descriptions, a floating-point value is
+   * considered to be an integer if and only if it is a fixed point of the
+   * method {@link #ceil(double)} or, equivalently, a fixed point of the
+   * method {@link #floor(double)}. A value is a fixed point of a one-argument
+   * method if and only if the result of applying the method to the value is
+   * equal to the value.) This is accurate within 1 ulp, and is semi-monotonic.
+   *
+   * @param a the number to raise
+   * @param b the power to raise it to
+   * @return a<sup>b</sup>
+   */
+  public static native double pow(double a, double b);
+
+  /**
+   * Get the IEEE 754 floating point remainder on two numbers. This is the
+   * value of <code>x - y * <em>n</em></code>, where <em>n</em> is the closest
+   * double to <code>x / y</code> (ties go to the even n); for a zero
+   * remainder, the sign is that of <code>x</code>. If either argument is NaN,
+   * the first argument is infinite, or the second argument is zero, the result
+   * is NaN; if x is finite but y is infinite, the result is x. This is
+   * accurate within the limits of doubles.
+   *
+   * @param x the dividend (the top half)
+   * @param y the divisor (the bottom half)
+   * @return the IEEE 754-defined floating point remainder of x/y
+   * @see #rint(double)
+   */
+  public static native double IEEEremainder(double x, double y);
+
+  /**
+   * Take the nearest integer that is that is greater than or equal to the
+   * argument. If the argument is NaN, infinite, or zero, the result is the
+   * same; if the argument is between -1 and 0, the result is negative zero.
+   * Note that <code>Math.ceil(x) == -Math.floor(-x)</code>.
+   *
+   * @param a the value to act upon
+   * @return the nearest integer &gt;= <code>a</code>
+   */
+  public static native double ceil(double a);
+
+  /**
+   * Take the nearest integer that is that is less than or equal to the
+   * argument. If the argument is NaN, infinite, or zero, the result is the
+   * same. Note that <code>Math.ceil(x) == -Math.floor(-x)</code>.
+   *
+   * @param a the value to act upon
+   * @return the nearest integer &lt;= <code>a</code>
+   */
+  public static native double floor(double a);
+
+  /**
+   * Take the nearest integer to the argument.  If it is exactly between
+   * two integers, the even integer is taken. If the argument is NaN,
+   * infinite, or zero, the result is the same.
+   *
+   * @param a the value to act upon
+   * @return the nearest integer to <code>a</code>
+   */
+  public static native double rint(double a);
+
+  /**
+   * <p>
+   * Take a cube root. If the argument is NaN, an infinity or zero, then
+   * the original value is returned.  The returned result must be within 1 ulp
+   * of the exact result.  For a finite value, <code>x</code>, the cube root
+   * of <code>-x</code> is equal to the negation of the cube root
+   * of <code>x</code>.
+   * </p>
+   * <p>
+   * For a square root, use <code>sqrt</code>.  For other roots, use
+   * <code>pow(a, 1 / rootNumber)</code>.
+   * </p>
+   *
+   * @param a the numeric argument
+   * @return the cube root of the argument
+   * @see #sqrt(double)
+   * @see #pow(double, double)
+   */
+  public static native double cbrt(double a);
+
+  /**
+   * <p>
+   * Returns the hyperbolic cosine of the given value.  For a value,
+   * <code>x</code>, the hyperbolic cosine is <code>(e<sup>x</sup> +
+   * e<sup>-x</sup>)/2</code>
+   * with <code>e</code> being <a href="#E">Euler's number</a>.  The returned
+   * result must be within 2.5 ulps of the exact result.
+   * </p>
+   * <p>
+   * If the supplied value is <code>NaN</code>, then the original value is
+   * returned.  For either infinity, positive infinity is returned.
+   * The hyperbolic cosine of zero must be 1.0.
+   * </p>
+   *
+   * @param a the numeric argument
+   * @return the hyperbolic cosine of <code>a</code>.
+   * @since 1.5
+   */
+  public static native double cosh(double a);
+
+  /**
+   * <p>
+   * Returns <code>e<sup>a</sup> - 1.  For values close to 0, the
+   * result of <code>expm1(a) + 1</code> tend to be much closer to the
+   * exact result than simply <code>exp(x)</code>.  The result must be within
+   * 1 ulp of the exact result, and results must be semi-monotonic.  For finite
+   * inputs, the returned value must be greater than or equal to -1.0.  Once
+   * a result enters within half a ulp of this limit, the limit is returned.
+   * </p>
+   * <p>
+   * For <code>NaN</code>, positive infinity and zero, the original value
+   * is returned.  Negative infinity returns a result of -1.0 (the limit).
+   * </p>
+   *
+   * @param a the numeric argument
+   * @return <code>e<sup>a</sup> - 1</code>
+   * @since 1.5
+   */
+  public static native double expm1(double a);
+
+  /**
+   * <p>
+   * Returns the hypotenuse, <code>a<sup>2</sup> + b<sup>2</sup></code>,
+   * without intermediate overflow or underflow.  The returned result must be
+   * within 1 ulp of the exact result.  If one parameter is held constant,
+   * then the result in the other parameter must be semi-monotonic.
+   * </p>
+   * <p>
+   * If either of the arguments is an infinity, then the returned result
+   * is positive infinity.  Otherwise, if either argument is <code>NaN</code>,
+   * then <code>NaN</code> is returned.
+   * </p>
+   *
+   * @param a the first parameter.
+   * @param b the second parameter.
+   * @return the hypotenuse matching the supplied parameters.
+   * @since 1.5
+   */
+  public static native double hypot(double a, double b);
+
+  /**
+   * <p>
+   * Returns the base 10 logarithm of the supplied value.  The returned
+   * result must within 1 ulp of the exact result, and the results must be
+   * semi-monotonic.
+   * </p>
+   * <p>
+   * Arguments of either <code>NaN</code> or less than zero return
+   * <code>NaN</code>.  An argument of positive infinity returns positive
+   * infinity.  Negative infinity is returned if either positive or negative
+   * zero is supplied.  Where the argument is the result of
+   * <code>10<sup>n</sup</code>, then <code>n</code> is returned.
+   * </p>
+   *
+   * @param a the numeric argument.
+   * @return the base 10 logarithm of <code>a</code>.
+   * @since 1.5
+   */
+  public static native double log10(double a);
+
+  /**
+   * <p>
+   * Returns the natural logarithm resulting from the sum of the argument,
+   * <code>a</code> and 1.  For values close to 0, the
+   * result of <code>log1p(a)</code> tend to be much closer to the
+   * exact result than simply <code>log(1.0+a)</code>.  The returned
+   * result must be within 1 ulp of the exact result, and the results must be
+   * semi-monotonic.
+   * </p>
+   * <p>
+   * Arguments of either <code>NaN</code> or less than -1 return
+   * <code>NaN</code>.  An argument of positive infinity or zero
+   * returns the original argument.  Negative infinity is returned from an
+   * argument of -1.
+   * </p>
+   *
+   * @param a the numeric argument.
+   * @return the natural logarithm of <code>a</code> + 1.
+   * @since 1.5
+   */
+  public static native double log1p(double a);
+
+  /**
+   * <p>
+   * Returns the hyperbolic sine of the given value.  For a value,
+   * <code>x</code>, the hyperbolic sine is <code>(e<sup>x</sup> -
+   * e<sup>-x</sup>)/2</code>
+   * with <code>e</code> being <a href="#E">Euler's number</a>.  The returned
+   * result must be within 2.5 ulps of the exact result.
+   * </p>
+   * <p>
+   * If the supplied value is <code>NaN</code>, an infinity or a zero, then the
+   * original value is returned.
+   * </p>
+   *
+   * @param a the numeric argument
+   * @return the hyperbolic sine of <code>a</code>.
+   * @since 1.5
+   */
+  public static native double sinh(double a);
+
+  /**
+   * <p>
+   * Returns the hyperbolic tangent of the given value.  For a value,
+   * <code>x</code>, the hyperbolic tangent is <code>(e<sup>x</sup> -
+   * e<sup>-x</sup>)/(e<sup>x</sup> + e<sup>-x</sup>)</code>
+   * (i.e. <code>sinh(a)/cosh(a)</code>)
+   * with <code>e</code> being <a href="#E">Euler's number</a>.  The returned
+   * result must be within 2.5 ulps of the exact result.  The absolute value
+   * of the exact result is always less than 1.  Computed results are thus
+   * less than or equal to 1 for finite arguments, with results within
+   * half a ulp of either positive or negative 1 returning the appropriate
+   * limit value (i.e. as if the argument was an infinity).
+   * </p>
+   * <p>
+   * If the supplied value is <code>NaN</code> or zero, then the original
+   * value is returned.  Positive infinity returns +1.0 and negative infinity
+   * returns -1.0.
+   * </p>
+   *
+   * @param a the numeric argument
+   * @return the hyperbolic tangent of <code>a</code>.
+   * @since 1.5
+   */
+  public static native double tanh(double a);
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMObject.java b/libjava/classpath/vm/reference/java/lang/VMObject.java
new file mode 100644
index 000000000..279f250c0
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMObject.java
@@ -0,0 +1,105 @@
+/* VMObject.java -- Reference implementation for VM hooks used by Object
+   Copyright (C) 1998, 2002, 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 java.lang;
+
+/**
+ * Object is the ultimate superclass of every class (excepting interfaces).
+ * As such, it needs help from the VM.
+ *
+ * @author John Keiser
+ * @author Eric Blake (ebb9@email.byu.edu)
+ */
+final class VMObject
+{
+  /**
+   * Returns the runtime {@link Class} of a given Object.
+   *
+   * @param obj the object to return the class for.
+   *
+   * @return the class of the Object.
+   */
+  static native Class getClass(Object obj);
+
+  /**
+   * The VM is expected to make a field-for-field shallow copy of the
+   * argument. Thus, the copy has the same runtime type as the argument.
+   * Note, however, that the cloned object must still be finalizable, even
+   * if the original has already had finalize() invoked on it.
+   *
+   * @param c the Cloneable to clone
+   * @return the clone
+   */
+  static native Object clone(Cloneable c);
+
+  /**
+   * Wakes up one of the threads that is waiting on this Object's monitor.
+   * Only the owner of a lock on the Object may call this method. The Thread
+   * to wake up is chosen arbitrarily.
+   *
+   * @param o the object doing the notify
+   * @throw IllegalMonitorStateException if this Thread does not own the
+   *        lock on the Object
+   */
+  static native void notify(Object o) throws IllegalMonitorStateException;
+
+  /**
+   * Wakes up all of the threads waiting on this Object's monitor.  Only
+   * the owner of the lock on this Object may call this method.
+   *
+   * @param o the object doing the notifyAll
+   * @throws IllegalMonitorStateException if this Thread does not own the
+   *         lock on the Object
+   */
+  static native void notifyAll(Object o) throws IllegalMonitorStateException;
+
+  /**
+   * Waits a specified amount of time for notify() or notifyAll() to be
+   * called on this Object.  The VM does not have to pay attention to the
+   * ns argument, if it does not have that much granularity.
+   *
+   * @param o the object to suspend on
+   * @param ms milliseconds to wait (1,000 milliseconds = 1 second)
+   * @param ns nanoseconds to wait beyond ms (1,000,000 nanoseconds
+   *        == 1 millisecond)
+   * @throws IllegalMonitorStateException if this Thread does not own the
+   *         lock on the Object
+   * @throws InterruptedException if some other Thread interrupts this Thread
+   */
+  static native void wait(Object o, long ms, int ns)
+    throws IllegalMonitorStateException, InterruptedException;
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMProcess.java b/libjava/classpath/vm/reference/java/lang/VMProcess.java
new file mode 100644
index 000000000..c41d7cc0c
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMProcess.java
@@ -0,0 +1,402 @@
+/* java.lang.VMProcess -- VM implementation of java.lang.Process
+   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+
+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 java.lang;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Represents one external process. Each instance of this class is in
+ * one of three states: INITIAL, RUNNING, or TERMINATED. The instance
+ * is {@link Object#notifyAll notifyAll()}'d each time the state changes.
+ * The state of all instances is managed by a single dedicated thread
+ * which does the actual fork()/exec() and wait() system calls. User
+ * threads {@link Object#wait()} on the instance when creating the
+ * process or waiting for it to terminate.
+ *
+ * <p>
+ * See
+ * <a href="http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11801">GCC bug
+ * #11801</a> for the motivation behind the design of this class.
+ *
+ * @author Archie Cobbs
+ * @see Process
+ * @see Runtime#exec(String)
+ */
+final class VMProcess extends Process
+{
+
+  // Possible states for a VMProcess
+  private static final int INITIAL = 0;
+  private static final int RUNNING = 1;
+  private static final int TERMINATED = 2;
+
+  // Dedicated thread that does all the fork()'ing and wait()'ing.
+  static Thread processThread;
+
+  // New processes waiting to be spawned by processThread.
+  static final LinkedList workList = new LinkedList();
+
+  // Return values set by nativeReap() when a child is reaped.
+  // These are only accessed by processThread so no locking required.
+  static long reapedPid;
+  static int reapedExitValue;
+
+  // Information about this process
+  int state;                                   // current state of process
+  final String[] cmd;                          // copied from Runtime.exec()
+  final String[] env;                          // copied from Runtime.exec()
+  final File dir;                              // copied from Runtime.exec()
+  Throwable exception;                         // if process failed to start
+  long pid;                                    // process id
+  OutputStream stdin;                          // process input stream
+  InputStream stdout;                          // process output stream
+  InputStream stderr;                          // process error stream
+  int exitValue;                               // process exit value
+  boolean redirect;                            // redirect stderr -> stdout
+
+  //
+  // Dedicated thread that does all the fork()'ing and wait()'ing
+  // for external processes. This is needed because some systems like
+  // Linux use a process-per-thread model, which means the same thread
+  // that did the fork()/exec() must also do the wait().
+  //
+  private static class ProcessThread extends Thread
+  {
+
+    // Max time (in ms) we'll delay before trying to reap another child.
+    private static final int MAX_REAP_DELAY = 1000;
+
+    // Processes created but not yet terminated; maps Long(pid) -> VMProcess
+    // Only used in run() and spawn() method from this Thread, so no locking.
+    private final HashMap activeMap = new HashMap();
+
+    // We have an explicit constructor, because the default
+    // constructor will be private, which means the compiler will have
+    // to generate a second package-private constructor, which is
+    // bogus.
+    ProcessThread ()
+    {
+    }
+
+    public void run()
+    {
+      final LinkedList workList = VMProcess.workList;
+      while (true)
+        {
+
+          // Get the next process to spawn (if any) and spawn it. Spawn
+          // at most one at a time before checking for reapable children.
+          VMProcess process = null;
+          synchronized (workList)
+            {
+              if (!workList.isEmpty())
+                process = (VMProcess)workList.removeFirst();
+            }
+
+          if (process != null)
+            spawn(process);
+
+
+          // Check for termination of active child processes
+          while (!activeMap.isEmpty() && VMProcess.nativeReap())
+            {
+              long pid = VMProcess.reapedPid;
+              int exitValue = VMProcess.reapedExitValue;
+              process = (VMProcess)activeMap.remove(new Long(pid));
+              if (process != null)
+                {
+                  synchronized (process)
+                    {
+                      process.exitValue = exitValue;
+                      process.state = TERMINATED;
+                      process.notify();
+                    }
+                }
+              else
+                System.err.println("VMProcess WARNING reaped unknown process: "
+                                   + pid);
+            }
+
+
+          // If there are more new processes to create, go do that now.
+          // If there is nothing left to do, exit this thread. Otherwise,
+          // sleep a little while, and then check again for reapable children.
+          // We will get woken up immediately if there are new processes to
+          // spawn, but not if there are new children to reap. So we only
+          // sleep a short time, in effect polling while processes are active.
+          synchronized (workList)
+            {
+              if (!workList.isEmpty())
+                continue;
+              if (activeMap.isEmpty())
+                {
+                  processThread = null;
+                  break;
+                }
+
+              try
+                {
+                  workList.wait(MAX_REAP_DELAY);
+                }
+              catch (InterruptedException e)
+                {
+                  /* ignore */
+                }
+            }
+        }
+    }
+
+    // Spawn a process
+    private void spawn(VMProcess process)
+    {
+
+      // Spawn the process and put it in our active map indexed by pid.
+      // If the spawn operation fails, store the exception with the process.
+      // In either case, wake up thread that created the process.
+      synchronized (process)
+        {
+          try
+            {
+              process.nativeSpawn(process.cmd, process.env, process.dir,
+                                  process.redirect);
+              process.state = RUNNING;
+              activeMap.put(new Long(process.pid), process);
+            }
+          catch (ThreadDeath death)
+            {
+              throw death;
+            }
+          catch (Throwable t)
+            {
+              process.state = TERMINATED;
+              process.exception = t;
+            }
+          process.notify();
+        }
+    }
+  }
+
+  // Constructor
+  private VMProcess(String[] cmd, String[] env, File dir, boolean redirect)
+    throws IOException
+  {
+
+    // Initialize this process
+    this.state = INITIAL;
+    this.cmd = cmd;
+    this.env = env;
+    this.dir = dir;
+    this.redirect = redirect;
+
+    // Add process to the new process work list and wakeup processThread
+    synchronized (workList)
+      {
+        workList.add(this);
+        if (processThread == null)
+          {
+            processThread = new ProcessThread();
+            processThread.setDaemon(true);
+            processThread.start();
+          }
+        else
+          {
+            workList.notify();
+          }
+      }
+
+    // Wait for processThread to spawn this process and update its state
+    synchronized (this)
+      {
+        while (state == INITIAL)
+          {
+            try
+              {
+                wait();
+              }
+            catch (InterruptedException e)
+              {
+                /* ignore */
+              }
+          }
+      }
+
+    // If spawning failed, rethrow the exception in this thread
+    if (exception != null)
+      {
+        exception.fillInStackTrace();
+        if (exception instanceof IOException)
+          throw (IOException)exception;
+
+        if (exception instanceof Error)
+          throw (Error)exception;
+
+        if (exception instanceof RuntimeException)
+          throw (RuntimeException)exception;
+
+        throw new RuntimeException(exception);
+      }
+  }
+
+  // Invoked by native code (from nativeSpawn()) to record process info.
+  private void setProcessInfo(OutputStream stdin,
+                              InputStream stdout, InputStream stderr, long pid)
+  {
+    this.stdin = stdin;
+    this.stdout = stdout;
+    if (stderr == null)
+      this.stderr = new InputStream()
+        {
+          public int read() throws IOException
+          {
+            return -1;
+          }
+        };
+    else
+      this.stderr = stderr;
+    this.pid = pid;
+  }
+
+  /**
+   * Entry point from Runtime.exec().
+   */
+  static Process exec(String[] cmd, String[] env, File dir) throws IOException
+  {
+    return new VMProcess(cmd, env, dir, false);
+  }
+
+  static Process exec(List cmd, Map env,
+                      File dir, boolean redirect) throws IOException
+  {
+    String[] acmd = (String[]) cmd.toArray(new String[cmd.size()]);
+    String[] aenv = new String[env.size()];
+
+    int i = 0;
+    Iterator iter = env.entrySet().iterator();
+    while (iter.hasNext())
+      {
+        Map.Entry entry = (Map.Entry) iter.next();
+        aenv[i++] = entry.getKey() + "=" + entry.getValue();
+      }
+
+    return new VMProcess(acmd, aenv, dir, redirect);
+  }
+
+  public OutputStream getOutputStream()
+  {
+    return stdin;
+  }
+
+  public InputStream getInputStream()
+  {
+    return stdout;
+  }
+
+  public InputStream getErrorStream()
+  {
+    return stderr;
+  }
+
+  public synchronized int waitFor() throws InterruptedException
+  {
+    while (state != TERMINATED)
+      wait();
+    return exitValue;
+  }
+
+  public synchronized int exitValue()
+  {
+    if (state != TERMINATED)
+      throw new IllegalThreadStateException();
+    return exitValue;
+  }
+
+  public synchronized void destroy()
+  {
+    if (state == TERMINATED)
+      return;
+
+    nativeKill(pid);
+
+    while (state != TERMINATED)
+      {
+        try
+          {
+            wait();
+          }
+        catch (InterruptedException e)
+          {
+            /* ignore */
+          }
+      }
+  }
+
+  /**
+   * Does the fork()/exec() thing to create the O/S process.
+   * Must invoke setProcessInfo() before returning successfully.
+   * This method is only invoked by processThread.
+   *
+   * @throws IOException if the O/S process could not be created.
+   */
+  native void nativeSpawn(String[] cmd, String[] env, File dir,
+                          boolean redirect)
+    throws IOException;
+
+  /**
+   * Test for a reapable child process, and reap if so. Does not block.
+   * If a child was reaped, this method must set reapedPid and
+   * reapedExitValue appropriately before returning.
+   * This method is only invoked by processThread.
+   *
+   * @return true if a child was reaped, otherwise false
+   */
+  // This is not private as it is called from an inner class.
+  static native boolean nativeReap();
+
+  /**
+   * Kill a process. This sends it a fatal signal but does not reap it.
+   */
+  private static native void nativeKill(long pid);
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMRuntime.java b/libjava/classpath/vm/reference/java/lang/VMRuntime.java
new file mode 100644
index 000000000..0b58d5f44
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMRuntime.java
@@ -0,0 +1,192 @@
+/* VMRuntime.java -- VM interface to Runtime
+   Copyright (C) 2003 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 java.lang;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * VMRuntime represents the interface to the Virtual Machine.
+ *
+ * @author Jeroen Frijters
+ */
+final class VMRuntime
+{
+    /**
+     * No instance is ever created.
+     */
+    private VMRuntime()
+    {
+    }
+
+    /**
+     * Returns the number of available processors currently available to the
+     * virtual machine. This number may change over time; so a multi-processor
+     * program want to poll this to determine maximal resource usage.
+     *
+     * @return the number of processors available, at least 1
+     */
+    static native int availableProcessors();
+
+    /**
+     * Find out how much memory is still free for allocating Objects on the heap.
+     *
+     * @return the number of bytes of free memory for more Objects
+     */
+    static native long freeMemory();
+
+    /**
+     * Find out how much memory total is available on the heap for allocating
+     * Objects.
+     *
+     * @return the total number of bytes of memory for Objects
+     */
+    static native long totalMemory();
+
+    /**
+     * Returns the maximum amount of memory the virtual machine can attempt to
+     * use. This may be <code>Long.MAX_VALUE</code> if there is no inherent
+     * limit (or if you really do have a 8 exabyte memory!).
+     *
+     * @return the maximum number of bytes the virtual machine will attempt
+     *         to allocate
+     */
+    static native long maxMemory();
+
+    /**
+     * Run the garbage collector. This method is more of a suggestion than
+     * anything. All this method guarantees is that the garbage collector will
+     * have "done its best" by the time it returns. Notice that garbage
+     * collection takes place even without calling this method.
+     */
+    static native void gc();
+
+    /**
+     * Run finalization on all Objects that are waiting to be finalized. Again,
+     * a suggestion, though a stronger one than {@link #gc()}. This calls the
+     * <code>finalize</code> method of all objects waiting to be collected.
+     *
+     * @see #finalize()
+     */
+    static native void runFinalization();
+
+    /**
+     * Run finalization on all finalizable Objects (even live ones). This
+     * should only be called immediately prior to VM termination.
+     *
+     * @see #finalize()
+     */
+    static native void runFinalizationForExit();
+
+    /**
+     * Tell the VM to trace every bytecode instruction that executes (print out
+     * a trace of it).  No guarantees are made as to where it will be printed,
+     * and the VM is allowed to ignore this request.
+     *
+     * @param on whether to turn instruction tracing on
+     */
+    static native void traceInstructions(boolean on);
+
+    /**
+     * Tell the VM to trace every method call that executes (print out a trace
+     * of it).  No guarantees are made as to where it will be printed, and the
+     * VM is allowed to ignore this request.
+     *
+     * @param on whether to turn method tracing on
+     */
+    static native void traceMethodCalls(boolean on);
+
+    /**
+     * Native method that actually sets the finalizer setting.
+     *
+     * @param value whether to run finalizers on exit
+     */
+    static native void runFinalizersOnExit(boolean value);
+
+    /**
+     * Native method that actually shuts down the virtual machine.
+     *
+     * @param status the status to end the process with
+     */
+    static native void exit(int status);
+
+    /**
+     * Load a file. If it has already been loaded, do nothing. The name has
+     * already been mapped to a true filename.
+     *
+     * @param filename the file to load
+     * @param loader class loader, or <code>null</code> for the boot loader
+     * @return 0 on failure, nonzero on success
+     */
+    static native int nativeLoad(String filename, ClassLoader loader);
+
+    /**
+     * Map a system-independent "short name" to the full file name.
+     *
+     * @param libname the short version of the library name
+     * @return the full filename
+     */
+    static native String mapLibraryName(String libname);
+
+    /**
+     * Execute a process. The command line has already been tokenized, and
+     * the environment should contain name=value mappings. If directory is null,
+     * use the current working directory; otherwise start the process in that
+     * directory.  If env is null, then the new process should inherit
+     * the environment of this process.
+     *
+     * @param cmd the non-null command tokens
+     * @param env the environment setup
+     * @param dir the directory to use, may be null
+     * @return the newly created process
+     * @throws NullPointerException if cmd or env have null elements
+     */
+    static Process exec(String[] cmd, String[] env, File dir)
+        throws IOException {
+      return VMProcess.exec(cmd, env, dir);
+    }
+
+    /**
+     * This method is called by Runtime.addShutdownHook() when it is
+     * called for the first time. It enables the VM to lazily setup
+     * an exit handler, should it so desire.
+     */
+    static void enableShutdownHooks()
+    {
+    }
+} // class VMRuntime
diff --git a/libjava/classpath/vm/reference/java/lang/VMString.java b/libjava/classpath/vm/reference/java/lang/VMString.java
new file mode 100644
index 000000000..e1fbf8390
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMString.java
@@ -0,0 +1,91 @@
+/* VMString.java -- VM Specific String methods
+   Copyright (C) 2003 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 java.lang;
+
+import java.lang.ref.WeakReference;
+import java.util.WeakHashMap;
+
+/*
+ * This class is a reference version, mainly for compiling a class library
+ * jar.  It is likely that VM implementers replace this with their own
+ * version that can communicate effectively with the VM.
+ */
+
+/**
+ * Code relocated from java.lang.String by
+ * @author Dave Grove <groved@us.ibm.com>
+ */
+final class VMString
+{
+
+  /**
+   * Holds the references for each intern()'d String. If all references to
+   * the string disappear, and the VM properly supports weak references,
+   * the String will be GC'd.
+   */
+  private static final WeakHashMap internTable = new WeakHashMap();
+
+  /**
+   * Fetches this String from the intern hashtable. If two Strings are
+   * considered equal, by the equals() method, then intern() will return the
+   * same String instance. ie. if (s1.equals(s2)) then
+   * (s1.intern() == s2.intern()). All string literals and string-valued
+   * constant expressions are already interned.
+   *
+   * @param str the String to intern
+   * @return the interned String
+   */
+  static String intern(String str)
+  {
+    synchronized (internTable)
+      {
+        WeakReference ref = (WeakReference) internTable.get(str);
+        if (ref != null)
+          {
+            String s = (String) ref.get();
+            // If s is null, then no strong references exist to the String;
+            // the weak hash map will soon delete the key.
+            if (s != null)
+              return s;
+          }
+        internTable.put(str, new WeakReference(str));
+      }
+    return str;
+  }
+
+} // class VMString
diff --git a/libjava/classpath/vm/reference/java/lang/VMSystem.java b/libjava/classpath/vm/reference/java/lang/VMSystem.java
new file mode 100644
index 000000000..52a3c1c9f
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMSystem.java
@@ -0,0 +1,220 @@
+/* VMSystem.java -- helper for java.lang.system
+   Copyright (C) 1998, 2002, 2004 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 java.lang;
+
+import java.util.List;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.PrintStream;
+
+/**
+ * VMSystem is a package-private helper class for System that the
+ * VM must implement.
+ *
+ * @author John Keiser
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ */
+final class VMSystem
+{
+  /**
+   * Copy one array onto another from <code>src[srcStart]</code> ...
+   * <code>src[srcStart+len-1]</code> to <code>dest[destStart]</code> ...
+   * <code>dest[destStart+len-1]</code>. First, the arguments are validated:
+   * neither array may be null, they must be of compatible types, and the
+   * start and length must fit within both arrays. Then the copying starts,
+   * and proceeds through increasing slots.  If src and dest are the same
+   * array, this will appear to copy the data to a temporary location first.
+   * An ArrayStoreException in the middle of copying will leave earlier
+   * elements copied, but later elements unchanged.
+   *
+   * @param src the array to copy elements from
+   * @param srcStart the starting position in src
+   * @param dest the array to copy elements to
+   * @param destStart the starting position in dest
+   * @param len the number of elements to copy
+   * @throws NullPointerException if src or dest is null
+   * @throws ArrayStoreException if src or dest is not an array, if they are
+   *         not compatible array types, or if an incompatible runtime type
+   *         is stored in dest
+   * @throws IndexOutOfBoundsException if len is negative, or if the start or
+   *         end copy position in either array is out of bounds
+   */
+  static native void arraycopy(Object src, int srcStart,
+                               Object dest, int destStart, int len);
+
+  /**
+   * Get a hash code computed by the VM for the Object. This hash code will
+   * be the same as Object's hashCode() method.  It is usually some
+   * convolution of the pointer to the Object internal to the VM.  It
+   * follows standard hash code rules, in that it will remain the same for a
+   * given Object for the lifetime of that Object.
+   *
+   * @param o the Object to get the hash code for
+   * @return the VM-dependent hash code for this Object
+   */
+  static native int identityHashCode(Object o);
+
+  /**
+   * Convert a library name to its platform-specific variant.
+   *
+   * @param libname the library name, as used in <code>loadLibrary</code>
+   * @return the platform-specific mangling of the name
+   * @XXX Add this method
+  static native String mapLibraryName(String libname);
+   */
+
+  /**
+   * Set {@link System#in} to a new InputStream.
+   *
+   * @param in the new InputStream
+   * @see #setIn(InputStream)
+   */
+  static native void setIn(InputStream in);
+
+  /**
+   * Set {@link System#out} to a new PrintStream.
+   *
+   * @param out the new PrintStream
+   * @see #setOut(PrintStream)
+   */
+  static native void setOut(PrintStream out);
+
+  /**
+   * Set {@link System#err} to a new PrintStream.
+   *
+   * @param err the new PrintStream
+   * @see #setErr(PrintStream)
+   */
+  static native void setErr(PrintStream err);
+
+  /**
+   * Get the current time, measured in the number of milliseconds from the
+   * beginning of Jan. 1, 1970. This is gathered from the system clock, with
+   * any attendant incorrectness (it may be timezone dependent).
+   *
+   * @return the current time
+   * @see java.util.Date
+   */
+   public static long currentTimeMillis()
+   {
+     return nanoTime() / 1000000L;
+   }
+
+  /**
+   * <p>
+   * Returns the current value of a nanosecond-precise system timer.
+   * The value of the timer is an offset relative to some arbitrary fixed
+   * time, which may be in the future (making the value negative).  This
+   * method is useful for timing events where nanosecond precision is
+   * required.  This is achieved by calling this method before and after the
+   * event, and taking the difference betweent the two times:
+   * </p>
+   * <p>
+   * <code>long startTime = System.nanoTime();</code><br />
+   * <code>... <emph>event code</emph> ...</code><br />
+   * <code>long endTime = System.nanoTime();</code><br />
+   * <code>long duration = endTime - startTime;</code><br />
+   * </p>
+   * <p>
+   * Note that the value is only nanosecond-precise, and not accurate; there
+   * is no guarantee that the difference between two values is really a
+   * nanosecond.  Also, the value is prone to overflow if the offset
+   * exceeds 2^63.
+   * </p>
+   *
+   * @return the time of a system timer in nanoseconds.
+   * @since 1.5
+   */
+  public static native long nanoTime();
+
+  /**
+   * Returns a list of 'name=value' pairs representing the current environment
+   * variables.
+   *
+   * @return a list of 'name=value' pairs.
+   */
+  static native List environ();
+
+  /**
+   * Helper method which creates the standard input stream.
+   * VM implementors may choose to construct these streams differently.
+   * This method can also return null if the stream is created somewhere
+   * else in the VM startup sequence.
+   */
+  static InputStream makeStandardInputStream()
+  {
+    return new BufferedInputStream(new FileInputStream(FileDescriptor.in));
+  }
+
+  /**
+   * Helper method which creates the standard output stream.
+   * VM implementors may choose to construct these streams differently.
+   * This method can also return null if the stream is created somewhere
+   * else in the VM startup sequence.
+   */
+  static PrintStream makeStandardOutputStream()
+  {
+    return new PrintStream(new BufferedOutputStream(new FileOutputStream(FileDescriptor.out)), true);
+  }
+
+  /**
+   * Helper method which creates the standard error stream.
+   * VM implementors may choose to construct these streams differently.
+   * This method can also return null if the stream is created somewhere
+   * else in the VM startup sequence.
+   */
+  static PrintStream makeStandardErrorStream()
+  {
+    return new PrintStream(new BufferedOutputStream(new FileOutputStream(FileDescriptor.err)), true);
+  }
+
+  /**
+   * Gets the value of an environment variable.
+   * Always returning null is a valid (but not very useful) implementation.
+   *
+   * @param name The name of the environment variable (will not be null).
+   * @return The string value of the variable or null when the
+   *         environment variable is not defined.
+   */
+  static native String getenv(String name);
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMThread.java b/libjava/classpath/vm/reference/java/lang/VMThread.java
new file mode 100644
index 000000000..1b461a694
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMThread.java
@@ -0,0 +1,461 @@
+/* VMThread -- VM interface for Thread of executable code
+   Copyright (C) 2003, 2004, 2005, 2006 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 java.lang;
+
+/**
+ * VM interface for Thread of executable code. Holds VM dependent state.
+ * It is deliberately package local and final and should only be accessed
+ * by the Thread class.
+ * <p>
+ * This is the GNU Classpath reference implementation, it should be adapted
+ * for a specific VM.
+ * <p>
+ * The following methods must be implemented:
+ * <ul>
+ * <li>native void start(long stacksize);
+ * <li>native void interrupt();
+ * <li>native boolean isInterrupted();
+ * <li>native void suspend();
+ * <li>native void resume();
+ * <li>native void nativeSetPriority(int priority);
+ * <li>native void nativeStop(Throwable t);
+ * <li>native static Thread currentThread();
+ * <li>static native void yield();
+ * <li>static native boolean interrupted();
+ * </ul>
+ * All other methods may be implemented to make Thread handling more efficient
+ * or to implement some optional (and sometimes deprecated) behaviour. Default
+ * implementations are provided but it is highly recommended to optimize them
+ * for a specific VM.
+ *
+ * @author Jeroen Frijters (jeroen@frijters.net)
+ * @author Dalibor Topic (robilad@kaffe.org)
+ */
+final class VMThread
+{
+    /**
+     * The Thread object that this VM state belongs to.
+     * Used in currentThread() and start().
+     * Note: when this thread dies, this reference is *not* cleared
+     */
+    volatile Thread thread;
+
+    /**
+     * Flag that is set when the thread runs, used by stop() to protect against
+     * stop's getting lost.
+     */
+    private volatile boolean running;
+
+    /**
+     * VM private data.
+     */
+    private transient Object vmdata;
+
+    /**
+     * Private constructor, create VMThreads with the static create method.
+     *
+     * @param thread The Thread object that was just created.
+     */
+    private VMThread(Thread thread)
+    {
+        this.thread = thread;
+    }
+
+    /**
+     * This method is the initial Java code that gets executed when a native
+     * thread starts. It's job is to coordinate with the rest of the VMThread
+     * logic and to start executing user code and afterwards handle clean up.
+     */
+    private void run()
+    {
+        try
+        {
+            try
+            {
+                running = true;
+                synchronized(thread)
+                {
+                    Throwable t = thread.stillborn;
+                    if(t != null)
+                    {
+                        thread.stillborn = null;
+                        throw t;
+                    }
+                }
+                thread.run();
+            }
+            catch(Throwable t)
+            {
+                try
+                {
+                  Thread.UncaughtExceptionHandler handler;
+                  handler = thread.getUncaughtExceptionHandler();
+                  handler.uncaughtException(thread, t);
+                }
+                catch(Throwable ignore)
+                {
+                }
+            }
+        }
+        finally
+        {
+            // Setting runnable to false is partial protection against stop
+            // being called while we're cleaning up. To be safe all code in
+            // VMThread be unstoppable.
+            running = false;
+            thread.die();
+            synchronized(this)
+            {
+                // release the threads waiting to join us
+                notifyAll();
+            }
+        }
+    }
+
+    /**
+     * Creates a native Thread. This is called from the start method of Thread.
+     * The Thread is started.
+     *
+     * @param thread The newly created Thread object
+     * @param stacksize Indicates the requested stacksize. Normally zero,
+     * non-zero values indicate requested stack size in bytes but it is up
+     * to the specific VM implementation to interpret them and may be ignored.
+     */
+    static void create(Thread thread, long stacksize)
+    {
+        VMThread vmThread = new VMThread(thread);
+        vmThread.start(stacksize);
+        thread.vmThread = vmThread;
+    }
+
+    /**
+     * Gets the name of the thread. Usually this is the name field of the
+     * associated Thread object, but some implementation might choose to
+     * return the name of the underlying platform thread.
+     */
+    String getName()
+    {
+        return thread.name;
+    }
+
+    /**
+     * Set the name of the thread. Usually this sets the name field of the
+     * associated Thread object, but some implementations might choose to
+     * set the name of the underlying platform thread.
+     * @param name The new name
+     */
+    void setName(String name)
+    {
+        thread.name = name;
+    }
+
+    /**
+     * Set the thread priority field in the associated Thread object and
+     * calls the native method to set the priority of the underlying
+     * platform thread.
+     * @param priority The new priority
+     */
+    void setPriority(int priority)
+    {
+        thread.priority = priority;
+        nativeSetPriority(priority);
+    }
+
+    /**
+     * Returns the priority. Usually this is the priority field from the
+     * associated Thread object, but some implementation might choose to
+     * return the priority of the underlying platform thread.
+     * @return this Thread's priority
+     */
+    int getPriority()
+    {
+        return thread.priority;
+    }
+
+    /**
+     * Returns true if the thread is a daemon thread. Usually this is the
+     * daemon field from the associated Thread object, but some
+     * implementation might choose to return the daemon state of the underlying
+     * platform thread.
+     * @return whether this is a daemon Thread or not
+     */
+    boolean isDaemon()
+    {
+        return thread.daemon;
+    }
+
+    /**
+     * Returns the number of stack frames in this Thread.
+     * Will only be called when when a previous call to suspend() returned true.
+     *
+     * @deprecated unsafe operation
+     */
+    native int countStackFrames();
+
+    /**
+     * Wait the specified amount of time for the Thread in question to die.
+     *
+     * <p>Note that 1,000,000 nanoseconds == 1 millisecond, but most VMs do
+     * not offer that fine a grain of timing resolution. Besides, there is
+     * no guarantee that this thread can start up immediately when time expires,
+     * because some other thread may be active.  So don't expect real-time
+     * performance.
+     *
+     * @param ms the number of milliseconds to wait, or 0 for forever
+     * @param ns the number of extra nanoseconds to sleep (0-999999)
+     * @throws InterruptedException if the Thread is interrupted; it's
+     *         <i>interrupted status</i> will be cleared
+     */
+    synchronized void join(long ms, int ns) throws InterruptedException
+    {
+        // Round up
+        ms += (ns != 0) ? 1 : 0;
+
+        // Compute end time, but don't overflow
+        long now = System.currentTimeMillis();
+        long end = now + ms;
+        if (end < now)
+            end = Long.MAX_VALUE;
+
+        // A VM is allowed to return from wait() without notify() having been
+        // called, so we loop to handle possible spurious wakeups.
+        while(thread.vmThread != null)
+        {
+            // We use the VMThread object to wait on, because this is a private
+            // object, so client code cannot call notify on us.
+            wait(ms);
+            if(ms != 0)
+            {
+                now = System.currentTimeMillis();
+                ms = end - now;
+                if(ms <= 0)
+                {
+                    break;
+                }
+            }
+        }
+    }
+
+    /**
+     * Cause this Thread to stop abnormally and throw the specified exception.
+     * If you stop a Thread that has not yet started, the stop is ignored
+     * (contrary to what the JDK documentation says).
+     * <b>WARNING</b>This bypasses Java security, and can throw a checked
+     * exception which the call stack is unprepared to handle. Do not abuse
+     * this power.
+     *
+     * <p>This is inherently unsafe, as it can interrupt synchronized blocks and
+     * leave data in bad states.
+     *
+     * <p><b>NOTE</b> stop() should take care not to stop a thread if it is
+     * executing code in this class.
+     *
+     * @param t the Throwable to throw when the Thread dies
+     * @deprecated unsafe operation, try not to use
+     */
+    void stop(Throwable t)
+    {
+        // Note: we assume that we own the lock on thread
+        // (i.e. that Thread.stop() is synchronized)
+        if(running)
+            nativeStop(t);
+        else
+            thread.stillborn = t;
+    }
+
+    /**
+     * Create a native thread on the underlying platform and start it executing
+     * on the run method of this object.
+     * @param stacksize the requested size of the native thread stack
+     */
+    native void start(long stacksize);
+
+    /**
+     * Interrupt this thread.
+     */
+    native void interrupt();
+
+    /**
+     * Determine whether this Thread has been interrupted, but leave
+     * the <i>interrupted status</i> alone in the process.
+     *
+     * @return whether the Thread has been interrupted
+     */
+    native boolean isInterrupted();
+
+    /**
+     * Suspend this Thread.  It will not come back, ever, unless it is resumed.
+     */
+    native void suspend();
+
+    /**
+     * Resume this Thread.  If the thread is not suspended, this method does
+     * nothing.
+     */
+    native void resume();
+
+    /**
+     * Set the priority of the underlying platform thread.
+     *
+     * @param priority the new priority
+     */
+    native void nativeSetPriority(int priority);
+
+    /**
+     * Asynchronously throw the specified throwable in this Thread.
+     *
+     * @param t the exception to throw
+     */
+    native void nativeStop(Throwable t);
+
+    /**
+     * Return the Thread object associated with the currently executing
+     * thread.
+     *
+     * @return the currently executing Thread
+     */
+    static native Thread currentThread();
+
+    /**
+     * Yield to another thread. The Thread will not lose any locks it holds
+     * during this time. There are no guarantees which thread will be
+     * next to run, and it could even be this one, but most VMs will choose
+     * the highest priority thread that has been waiting longest.
+     */
+    static native void yield();
+
+    /**
+     * Suspend the current Thread's execution for the specified amount of
+     * time. The Thread will not lose any locks it has during this time. There
+     * are no guarantees which thread will be next to run, but most VMs will
+     * choose the highest priority thread that has been waiting longest.
+     *
+     * <p>Note that 1,000,000 nanoseconds == 1 millisecond, but most VMs do
+     * not offer that fine a grain of timing resolution. Besides, there is
+     * no guarantee that this thread can start up immediately when time expires,
+     * because some other thread may be active.  So don't expect real-time
+     * performance.
+     *
+     * @param ms the number of milliseconds to sleep.
+     * @param ns the number of extra nanoseconds to sleep (0-999999)
+     * @throws InterruptedException if the Thread is (or was) interrupted;
+     *         it's <i>interrupted status</i> will be cleared
+     */
+    static void sleep(long ms, int ns) throws InterruptedException
+    {
+      // Note: JDK treats a zero length sleep is like Thread.yield(),
+      // without checking the interrupted status of the thread.
+      // It's unclear if this is a bug in the implementation or the spec.
+      // See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6213203
+      if (ms == 0 && ns == 0)
+        {
+          if (Thread.interrupted())
+            throw new InterruptedException();
+          return;
+        }
+
+      // Compute end time, but don't overflow
+      long now = System.currentTimeMillis();
+      long end = now + ms;
+      if (end < now)
+          end = Long.MAX_VALUE;
+
+      // A VM is allowed to return from wait() without notify() having been
+      // called, so we loop to handle possible spurious wakeups.
+      VMThread vt = Thread.currentThread().vmThread;
+      synchronized (vt)
+        {
+          while (true)
+            {
+              vt.wait(ms, ns);
+              now = System.currentTimeMillis();
+              if (now >= end)
+                break;
+              ms = end - now;
+              ns = 0;
+            }
+        }
+    }
+
+    /**
+     * Determine whether the current Thread has been interrupted, and clear
+     * the <i>interrupted status</i> in the process.
+     *
+     * @return whether the current Thread has been interrupted
+     */
+    static native boolean interrupted();
+
+    /**
+     * Checks whether the current thread holds the monitor on a given object.
+     * This allows you to do <code>assert Thread.holdsLock(obj)</code>.
+     *
+     * @param obj the object to check
+     * @return true if the current thread is currently synchronized on obj
+     * @throws NullPointerException if obj is null
+     */
+    static boolean holdsLock(Object obj)
+    {
+      /* Use obj.notify to check if the current thread holds
+       * the monitor of the object.
+       * If it doesn't, notify will throw an exception.
+       */
+      try
+        {
+          obj.notify();
+          // okay, current thread holds lock
+          return true;
+        }
+      catch (IllegalMonitorStateException e)
+        {
+          // it doesn't hold the lock
+          return false;
+        }
+    }
+
+  /**
+   * Returns the current state of the thread.
+   * The value must be one of "BLOCKED", "NEW",
+   * "RUNNABLE", "TERMINATED", "TIMED_WAITING" or
+   * "WAITING".
+   *
+   * @return a string corresponding to one of the
+   *         thread enumeration states specified above.
+   */
+  native String getState();
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/VMThrowable.java b/libjava/classpath/vm/reference/java/lang/VMThrowable.java
new file mode 100644
index 000000000..19a204e88
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/VMThrowable.java
@@ -0,0 +1,82 @@
+/* java.lang.VMThrowable -- VM support methods for Throwable.
+   Copyright (C) 1998, 1999, 2002 Free Software Foundation, Inc.
+
+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 java.lang;
+
+/**
+ * VM dependant state and support methods for Throwable.
+ * It is deliberately package local and final and should only be accessed
+ * by the Throwable class.
+ * <p>
+ * This is the GNU Classpath reference implementation, it should be adapted
+ * for a specific VM. The reference implementation does nothing.
+ *
+ * @author Mark Wielaard (mark@klomp.org)
+ */
+final class VMThrowable
+{
+  /**
+   * VM private data.
+   */
+  private transient Object vmdata;
+
+  /**
+   * Private contructor, create VMThrowables with fillInStackTrace();
+   */
+  private VMThrowable() { }
+
+  /**
+   * Fill in the stack trace with the current execution stack.
+   * Called by <code>Throwable.fillInStackTrace()</code> to get the state of
+   * the VM. Can return null when the VM does not support caputing the VM
+   * execution state.
+   *
+   * @return a new VMThrowable containing the current execution stack trace.
+   * @see Throwable#fillInStackTrace()
+   */
+  static native VMThrowable fillInStackTrace(Throwable t);
+
+  /**
+   * Returns an <code>StackTraceElement</code> array based on the execution
+   * state of the VM as captured by <code>fillInStackTrace</code>.
+   * Called by <code>Throwable.getStackTrace()</code>.
+   *
+   * @return a non-null but possible zero length array of StackTraceElement.
+   * @see Throwable#getStackTrace()
+   */
+  native StackTraceElement[] getStackTrace(Throwable t);
+}
diff --git a/libjava/classpath/vm/reference/java/lang/management/VMManagementFactory.java b/libjava/classpath/vm/reference/java/lang/management/VMManagementFactory.java
new file mode 100644
index 000000000..f10497014
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/management/VMManagementFactory.java
@@ -0,0 +1,75 @@
+/* VMManagementFactory.java - VM interface for obtaining system beans.
+   Copyright (C) 2006 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 java.lang.management;
+
+/**
+ * Provides lists of resources required by the
+ * {@link java.lang.management.ManagementFactory} for
+ * creating beans.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+final class VMManagementFactory
+{
+
+  /**
+   * Return a list of the names of the currently available
+   * memory pools within the virtual machine.
+   *
+   * @return a list of memory pool names.
+   */
+  static native String[] getMemoryPoolNames();
+
+  /**
+   * Return a list of the names of the currently available
+   * memory managers within the virtual machine.  This should
+   * not include the garbage collectors listed below.
+   *
+   * @return a list of memory manager names.
+   */
+  static native String[] getMemoryManagerNames();
+
+  /**
+   * Return a list of the names of the currently available
+   * garbage collectors within the virtual machine.
+   *
+   * @return a list of garbage collector names.
+   */
+  static native String[] getGarbageCollectorNames();
+}
diff --git a/libjava/classpath/vm/reference/java/lang/reflect/VMArray.java b/libjava/classpath/vm/reference/java/lang/reflect/VMArray.java
new file mode 100644
index 000000000..d6277aebd
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/reflect/VMArray.java
@@ -0,0 +1,65 @@
+/* java.lang.reflect.VMArray - VM class for array manipulation by reflection.
+   Copyright (C) 1998, 1999, 2001, 2003, 2005  Free Software Foundation, Inc.
+
+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 java.lang.reflect;
+
+import gnu.classpath.Configuration;
+
+class VMArray
+{
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javalangreflect");
+      }
+  }
+
+  /**
+   * Dynamically create an array of objects.
+   *
+   * @param type guaranteed to be a valid object type
+   * @param dim the length of the array
+   * @return the new array
+   * @throws NegativeArraySizeException if dim is negative
+   * @throws OutOfMemoryError if memory allocation fails
+   */
+  static native Object createObjectArray(Class type, int dim);
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/reflect/VMConstructor.java b/libjava/classpath/vm/reference/java/lang/reflect/VMConstructor.java
new file mode 100644
index 000000000..c6f319026
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/reflect/VMConstructor.java
@@ -0,0 +1,169 @@
+/* java.lang.reflect.VMConstructor - VM interface for reflection of Java constructors
+   Copyright (C) 1998, 2001, 2004, 2005 Free Software Foundation, Inc.
+
+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 java.lang.reflect;
+
+import java.lang.annotation.Annotation;
+
+import java.util.Arrays;
+
+final class VMConstructor
+{
+  Class clazz;
+  int slot;
+
+  /**
+   * This field allows us to refer back to the main constructor instance.
+   *  It is set by the constructor of Constructor.
+   */
+  Constructor cons;
+
+  VMConstructor(Class clazz, int slot)
+  {
+    this.clazz = clazz;
+    this.slot = slot;
+  }
+
+  public Class getDeclaringClass()
+  {
+    return clazz;
+  }
+
+  /**
+   * Return the raw modifiers for this constructor.  In particular
+   * this will include the synthetic and varargs bits.
+   * @return the constructor's modifiers
+   */
+  native int getModifiersInternal();
+
+  /**
+   * Get the parameter list for this constructor, in declaration order. If the
+   * constructor takes no parameters, returns a 0-length array (not null).
+   *
+   * @return a list of the types of the constructor's parameters
+   */
+  native Class[] getParameterTypes();
+
+  /**
+   * Get the exception types this constructor says it throws, in no particular
+   * order. If the constructor has no throws clause, returns a 0-length array
+   * (not null).
+   *
+   * @return a list of the types in the constructor's throws clause
+   */
+  native Class[] getExceptionTypes();
+
+  native Object construct(Object[] args)
+    throws InstantiationException, IllegalAccessException,
+    InvocationTargetException;
+
+  /**
+   * Return the String in the Signature attribute for this constructor. If there
+   * is no Signature attribute, return null.
+   */
+  native String getSignature();
+
+  /**
+   * <p>
+   * Return an array of arrays representing the annotations on each
+   * of the constructor's parameters.  The outer array is aligned against
+   * the parameters of the constructors and is thus equal in length to
+   * the number of parameters (thus having a length zero if there are none).
+   * Each array element in the outer array contains an inner array which
+   * holds the annotations.  This array has a length of zero if the parameter
+   * has no annotations.
+   * </p>
+   * <p>
+   * The returned annotations are serialized.  Changing the annotations has
+   * no affect on the return value of future calls to this method.
+   * </p>
+   *
+   * @return an array of arrays which represents the annotations used on the
+   *         parameters of this constructor.  The order of the array elements
+   *         matches the declaration order of the parameters.
+   * @since 1.5
+   */
+  native Annotation[][] getParameterAnnotations();
+
+  /**
+   * Compare two objects to see if they are semantically equivalent.
+   * Two Constructors are semantically equivalent if they have the same
+   * declaring class and the same parameter list.  This ignores different
+   * exception clauses, but since you can't create a Method except through the
+   * VM, this is just the == relation.
+   *
+   * @param o the object to compare to
+   * @return <code>true</code> if they are equal; <code>false</code> if not.
+   */
+  public boolean equals(Object o)
+  {
+    if (!(o instanceof Constructor))
+      return false;
+    Constructor that = (Constructor)o;
+    if (clazz != that.getDeclaringClass())
+      return false;
+    if (!Arrays.equals(getParameterTypes(), that.getParameterTypes()))
+      return false;
+    return true;
+  }
+
+  /**
+   * Returns the element's annotation for the specified annotation type,
+   * or <code>null</code> if no such annotation exists.
+   *
+   * @param annotationClass the type of annotation to look for.
+   * @return this element's annotation for the specified type, or
+   *         <code>null</code> if no such annotation exists.
+   * @throws NullPointerException if the annotation class is <code>null</code>.
+   */
+  native Annotation getAnnotation(Class annotationClass);
+
+  /**
+   * Returns all annotations directly defined by the element.  If there are
+   * no annotations directly associated with the element, then a zero-length
+   * array will be returned.  The returned array may be modified by the client
+   * code, but this will have no effect on the annotation content of this
+   * class, and hence no effect on the return value of this method for
+   * future callers.
+   *
+   * @return the annotations directly defined by the element.
+   * @since 1.5
+   */
+  native Annotation[] getDeclaredAnnotations();
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/reflect/VMField.java b/libjava/classpath/vm/reference/java/lang/reflect/VMField.java
new file mode 100644
index 000000000..ee9239a8e
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/reflect/VMField.java
@@ -0,0 +1,549 @@
+/* java.lang.reflect.Field - VM interface for reflection of Java fields
+   Copyright (C) 1998, 2001, 2005, 2008 Free Software Foundation, Inc.
+
+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 java.lang.reflect;
+
+import java.lang.annotation.Annotation;
+
+final class VMField
+{
+  Class clazz;
+  String name;
+  int slot;
+
+  /**
+   * This field allows us to refer back to the main constructor instance.
+   *  It is set by the constructor of Field.
+   */
+  Field f;
+
+  VMField(Class clazz, String name, int slot)
+  {
+    this.clazz = clazz;
+    this.name = name;
+    this.slot = slot;
+  }
+
+  public Class getDeclaringClass()
+  {
+    return clazz;
+  }
+
+  public String getName()
+  {
+    return name;
+  }
+
+  /**
+   * Return the raw modifiers for this field.
+   * @return the field's modifiers
+   */
+  native int getModifiersInternal();
+
+  /**
+   * Gets the type of this field.
+   * @return the type of this field
+   */
+  native Class getType();
+
+  /**
+   * Get the value of this Field.  If it is primitive, it will be wrapped
+   * in the appropriate wrapper type (boolean = java.lang.Boolean).<p>
+   *
+   * If the field is static, <code>o</code> will be ignored. Otherwise, if
+   * <code>o</code> is null, you get a <code>NullPointerException</code>,
+   * and if it is incompatible with the declaring class of the field, you
+   * get an <code>IllegalArgumentException</code>.<p>
+   *
+   * Next, if this Field enforces access control, your runtime context is
+   * evaluated, and you may have an <code>IllegalAccessException</code> if
+   * you could not access this field in similar compiled code. If the field
+   * is static, and its class is uninitialized, you trigger class
+   * initialization, which may end in a
+   * <code>ExceptionInInitializerError</code>.<p>
+   *
+   * Finally, the field is accessed, and primitives are wrapped (but not
+   * necessarily in new objects). This method accesses the field of the
+   * declaring class, even if the instance passed in belongs to a subclass
+   * which declares another field to hide this one.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if <code>o</code> is not an instance of
+   *         the class or interface declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #getBoolean(Object)
+   * @see #getByte(Object)
+   * @see #getChar(Object)
+   * @see #getShort(Object)
+   * @see #getInt(Object)
+   * @see #getLong(Object)
+   * @see #getFloat(Object)
+   * @see #getDouble(Object)
+   */
+  native Object get(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this boolean Field. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a boolean field of
+   *         <code>o</code>, or if <code>o</code> is not an instance of the
+   *         declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native boolean getBoolean(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this byte Field. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte field of
+   *         <code>o</code>, or if <code>o</code> is not an instance of the
+   *         declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native byte getByte(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as a char. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a char field of
+   *         <code>o</code>, or if <code>o</code> is not an instance
+   *         of the declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native char getChar(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as a short. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte or short
+   *         field of <code>o</code>, or if <code>o</code> is not an instance
+   *         of the declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native short getShort(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as an int. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte, short, char, or
+   *         int field of <code>o</code>, or if <code>o</code> is not an
+   *         instance of the declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native int getInt(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as a long. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte, short, char, int,
+   *         or long field of <code>o</code>, or if <code>o</code> is not an
+   *         instance of the declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native long getLong(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as a float. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte, short, char, int,
+   *         long, or float field of <code>o</code>, or if <code>o</code> is
+   *         not an instance of the declaring class of this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native float getFloat(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Get the value of this Field as a double. If the field is static,
+   * <code>o</code> will be ignored.
+   *
+   * @param o the object to get the value of this Field from
+   * @return the value of the Field
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte, short, char, int,
+   *         long, float, or double field of <code>o</code>, or if
+   *         <code>o</code> is not an instance of the declaring class of this
+   *         field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #get(Object)
+   */
+  native double getDouble(Object o)
+    throws IllegalAccessException;
+
+  /**
+   * Set the value of this Field.  If it is a primitive field, the value
+   * will be unwrapped from the passed object (boolean = java.lang.Boolean).<p>
+   *
+   * If the field is static, <code>o</code> will be ignored. Otherwise, if
+   * <code>o</code> is null, you get a <code>NullPointerException</code>,
+   * and if it is incompatible with the declaring class of the field, you
+   * get an <code>IllegalArgumentException</code>.<p>
+   *
+   * Next, if this Field enforces access control, your runtime context is
+   * evaluated, and you may have an <code>IllegalAccessException</code> if
+   * you could not access this field in similar compiled code. This also
+   * occurs whether or not there is access control if the field is final.
+   * If the field is primitive, and unwrapping your argument fails, you will
+   * get an <code>IllegalArgumentException</code>; likewise, this error
+   * happens if <code>value</code> cannot be cast to the correct object type.
+   * If the field is static, and its class is uninitialized, you trigger class
+   * initialization, which may end in a
+   * <code>ExceptionInInitializerError</code>.<p>
+   *
+   * Finally, the field is set with the widened value. This method accesses
+   * the field of the declaring class, even if the instance passed in belongs
+   * to a subclass which declares another field to hide this one.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if <code>value</code> cannot be
+   *         converted by a widening conversion to the underlying type of
+   *         the Field, or if <code>o</code> is not an instance of the class
+   *         declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #setBoolean(Object, boolean)
+   * @see #setByte(Object, byte)
+   * @see #setChar(Object, char)
+   * @see #setShort(Object, short)
+   * @see #setInt(Object, int)
+   * @see #setLong(Object, long)
+   * @see #setFloat(Object, float)
+   * @see #setDouble(Object, double)
+   */
+  native void set(Object o, Object value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this boolean Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a boolean field, or if
+   *         <code>o</code> is not an instance of the class declaring this
+   *         field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setBoolean(Object o, boolean value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this byte Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a byte, short, int, long,
+   *         float, or double field, or if <code>o</code> is not an instance
+   *         of the class declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setByte(Object o, byte value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this char Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a char, int, long,
+   *         float, or double field, or if <code>o</code> is not an instance
+   *         of the class declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setChar(Object o, char value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this short Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a short, int, long,
+   *         float, or double field, or if <code>o</code> is not an instance
+   *         of the class declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setShort(Object o, short value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this int Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not an int, long, float, or
+   *         double field, or if <code>o</code> is not an instance of the
+   *         class declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setInt(Object o, int value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this long Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a long, float, or double
+   *         field, or if <code>o</code> is not an instance of the class
+   *         declaring this field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setLong(Object o, long value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this float Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a float or long field, or
+   *         if <code>o</code> is not an instance of the class declaring this
+   *         field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setFloat(Object o, float value)
+    throws IllegalAccessException;
+
+  /**
+   * Set this double Field. If the field is static, <code>o</code> will be
+   * ignored.
+   *
+   * @param o the object to set this Field on
+   * @param value the value to set this Field to
+   * @throws IllegalAccessException if you could not normally access this field
+   *         (i.e. it is not public)
+   * @throws IllegalArgumentException if this is not a double field, or if
+   *         <code>o</code> is not an instance of the class declaring this
+   *         field
+   * @throws NullPointerException if <code>o</code> is null and this field
+   *         requires an instance
+   * @throws ExceptionInInitializerError if accessing a static field triggered
+   *         class initialization, which then failed
+   * @see #set(Object, Object)
+   */
+  native void setDouble(Object o, double value)
+    throws IllegalAccessException;
+
+  /**
+   * Return the String in the Signature attribute for this field. If there
+   * is no Signature attribute, return null.
+   *
+   */
+  native String getSignature();
+
+  /**
+   * Compare two objects to see if they are semantically equivalent.
+   * Two Fields are semantically equivalent if they have the same declaring
+   * class, name, and type. Since you can't create a Field except through
+   * the VM, this is just the == relation.
+   *
+   * @param o the object to compare to
+   * @return <code>true</code> if they are equal; <code>false</code> if not
+   */
+  public boolean equals(Object o)
+  {
+    if (!(o instanceof Field))
+      return false;
+    Field that = (Field)o;
+    if (clazz != that.getDeclaringClass())
+      return false;
+    if (!name.equals(that.getName()))
+      return false;
+    if (getType() != that.getType())
+      return false;
+    return true;
+  }
+
+  /**
+   * Returns the element's annotation for the specified annotation type,
+   * or <code>null</code> if no such annotation exists.
+   *
+   * @param annotationClass the type of annotation to look for.
+   * @return this element's annotation for the specified type, or
+   *         <code>null</code> if no such annotation exists.
+   * @throws NullPointerException if the annotation class is <code>null</code>.
+   */
+  native Annotation getAnnotation(Class annotationClass);
+
+  /**
+   * Returns all annotations directly defined by the element.  If there are
+   * no annotations directly associated with the element, then a zero-length
+   * array will be returned.  The returned array may be modified by the client
+   * code, but this will have no effect on the annotation content of this
+   * class, and hence no effect on the return value of this method for
+   * future callers.
+   *
+   * @return the annotations directly defined by the element.
+   * @since 1.5
+   */
+  native Annotation[] getDeclaredAnnotations();
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/reflect/VMMethod.java b/libjava/classpath/vm/reference/java/lang/reflect/VMMethod.java
new file mode 100644
index 000000000..d8bb8b4a3
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/reflect/VMMethod.java
@@ -0,0 +1,208 @@
+/* java.lang.reflect.VMMethod - VM interface for reflection of Java methods
+   Copyright (C) 1998, 2001, 2002, 2005, 2007, 2008 Free Software Foundation, Inc.
+
+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 java.lang.reflect;
+
+import java.lang.annotation.Annotation;
+
+import java.util.Arrays;
+
+final class VMMethod
+{
+  Class clazz;
+  String name;
+  int slot;
+
+  /**
+   * This field allows us to refer back to the main constructor instance.
+   *  It is set by the constructor of Field.
+   */
+  Method m;
+
+  public Class getDeclaringClass()
+  {
+    return clazz;
+  }
+
+  public String getName()
+  {
+    return name;
+  }
+
+  /**
+   * Return the raw modifiers for this method.
+   * @return the method's modifiers
+   */
+  native int getModifiersInternal();
+
+  /**
+   * Gets the return type of this method.
+   * @return the type of this method
+   */
+  native Class getReturnType();
+
+  /**
+   * Get the parameter list for this method, in declaration order. If the
+   * method takes no parameters, returns a 0-length array (not null).
+   *
+   * @return a list of the types of the method's parameters
+   */
+  native Class[] getParameterTypes();
+
+  /**
+   * Get the exception types this method says it throws, in no particular
+   * order. If the method has no throws clause, returns a 0-length array
+   * (not null).
+   *
+   * @return a list of the types in the method's throws clause
+   */
+  native Class[] getExceptionTypes();
+
+  native Object invoke(Object o, Object[] args)
+    throws IllegalAccessException, InvocationTargetException;
+
+  /**
+   * Return the String in the Signature attribute for this method. If there
+   * is no Signature attribute, return null.
+   */
+  native String getSignature();
+
+  /**
+   * If this method is an annotation method, returns the default
+   * value for the method.  If there is no default value, or if the
+   * method is not a member of an annotation type, returns null.
+   * Primitive types are wrapped.
+   *
+   * @throws TypeNotPresentException if the method returns a Class,
+   * and the class cannot be found
+   *
+   * @since 1.5
+   */
+  native Object getDefaultValue();
+
+  /**
+   * <p>
+   * Return an array of arrays representing the annotations on each
+   * of the method's parameters.  The outer array is aligned against
+   * the parameters of the method and is thus equal in length to
+   * the number of parameters (thus having a length zero if there are none).
+   * Each array element in the outer array contains an inner array which
+   * holds the annotations.  This array has a length of zero if the parameter
+   * has no annotations.
+   * </p>
+   * <p>
+   * The returned annotations are serialized.  Changing the annotations has
+   * no affect on the return value of future calls to this method.
+   * </p>
+   *
+   * @return an array of arrays which represents the annotations used on the
+   *         parameters of this method.  The order of the array elements
+   *         matches the declaration order of the parameters.
+   * @since 1.5
+   */
+  native Annotation[][] getParameterAnnotations();
+
+  /**
+   * Compare two objects to see if they are semantically equivalent.
+   * Two Methods are semantically equivalent if they have the same declaring
+   * class, name, parameter list, and return type.
+   *
+   * @param o the object to compare to
+   * @return <code>true</code> if they are equal; <code>false</code> if not
+   */
+  public boolean equals(Object o)
+  {
+      // Implementation note:
+      // The following is a correct but possibly slow implementation.
+      //
+      // This class has a private field 'slot' that could be used by
+      // the VM implementation to "link" a particular method to a Class.
+      // In that case equals could be simply implemented as:
+      //
+      // if (o instanceof Method)
+      // {
+      //    Method m = (Method)o;
+      //    return m.declaringClass == this.declaringClass
+      //           && m.slot == this.slot;
+      // }
+      // return false;
+      //
+      // If a VM uses the Method class as their native/internal representation
+      // then just using the following would be optimal:
+      //
+      // return this == o;
+      //
+    if (!(o instanceof Method))
+      return false;
+    Method that = (Method)o;
+    if (clazz != that.getDeclaringClass())
+      return false;
+    if (!name.equals(that.getName()))
+      return false;
+    if (getReturnType() != that.getReturnType())
+      return false;
+    if (!Arrays.equals(getParameterTypes(), that.getParameterTypes()))
+      return false;
+    return true;
+  }
+
+  /**
+   * Returns the element's annotation for the specified annotation type,
+   * or <code>null</code> if no such annotation exists.
+   *
+   * @param annotationClass the type of annotation to look for.
+   * @return this element's annotation for the specified type, or
+   *         <code>null</code> if no such annotation exists.
+   * @throws NullPointerException if the annotation class is <code>null</code>.
+   */
+  native Annotation getAnnotation(Class annotationClass);
+
+  /**
+   * Returns all annotations directly defined by the element.  If there are
+   * no annotations directly associated with the element, then a zero-length
+   * array will be returned.  The returned array may be modified by the client
+   * code, but this will have no effect on the annotation content of this
+   * class, and hence no effect on the return value of this method for
+   * future callers.
+   *
+   * @return the annotations directly defined by the element.
+   * @since 1.5
+   */
+  native Annotation[] getDeclaredAnnotations();
+
+}
diff --git a/libjava/classpath/vm/reference/java/lang/reflect/VMProxy.java b/libjava/classpath/vm/reference/java/lang/reflect/VMProxy.java
new file mode 100644
index 000000000..8c7b67a72
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/lang/reflect/VMProxy.java
@@ -0,0 +1,135 @@
+/* VMProxy.java -- VM interface for proxy class
+   Copyright (C) 2005  Free Software Foundation, Inc.
+
+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 java.lang.reflect;
+
+final class VMProxy
+{
+  /**
+   * Set to true if the VM provides a native method to implement
+   * Proxy.getProxyClass completely, including argument verification.
+   * If this is true, HAVE_NATIVE_GET_PROXY_DATA and
+   * HAVE_NATIVE_GENERATE_PROXY_CLASS should be false.
+   * @see java.lang.reflect.Proxy
+   */
+  static boolean HAVE_NATIVE_GET_PROXY_CLASS = false;
+
+  /**
+   * Set to true if the VM provides a native method to implement
+   * the first part of Proxy.getProxyClass: generation of the array
+   * of methods to convert, and verification of the arguments.
+   * If this is true, HAVE_NATIVE_GET_PROXY_CLASS should be false.
+   * @see java.lang.reflect.Proxy
+   */
+  static boolean HAVE_NATIVE_GET_PROXY_DATA = false;
+
+  /**
+   * Set to true if the VM provides a native method to implement
+   * the second part of Proxy.getProxyClass: conversion of an array of
+   * methods into an actual proxy class.
+   * If this is true, HAVE_NATIVE_GET_PROXY_CLASS should be false.
+   * @see java.lang.reflect.Proxy
+   */
+  static boolean HAVE_NATIVE_GENERATE_PROXY_CLASS = false;
+
+  /**
+   * Optional native method to replace (and speed up) the pure Java
+   * implementation of getProxyClass.  Only needed if
+   * VMProxy.HAVE_NATIVE_GET_PROXY_CLASS is true, this does the
+   * work of both getProxyData and generateProxyClass with no
+   * intermediate form in Java. The native code may safely assume that
+   * this class must be created, and does not already exist.
+   *
+   * @param loader the class loader to define the proxy class in; null
+   *        implies the bootstrap class loader
+   * @param interfaces the interfaces the class will extend
+   * @return the generated proxy class
+   * @throws IllegalArgumentException if the constraints for getProxyClass
+   *         were violated, except for problems with null
+   * @throws NullPointerException if `interfaces' is null or contains
+   *         a null entry, or if handler is null
+   * @see #HAVE_NATIVE_GET_PROXY_CLASS
+   * @see #getProxyClass(ClassLoader, Class[])
+   * @see #getProxyData(ClassLoader, Class[])
+   * @see #generateProxyClass(ClassLoader, Proxy.ProxyData)
+   */
+  static native Class getProxyClass(ClassLoader loader, Class[] interfaces);
+
+  /**
+   * Optional native method to replace (and speed up) the pure Java
+   * implementation of getProxyData.  Only needed if
+   * Configuration.HAVE_NATIVE_GET_PROXY_DATA is true. The native code
+   * may safely assume that a new ProxyData object must be created which
+   * does not duplicate any existing ones.
+   *
+   * @param loader the class loader to define the proxy class in; null
+   *        implies the bootstrap class loader
+   * @param interfaces the interfaces the class will extend
+   * @return all data that is required to make this proxy class
+   * @throws IllegalArgumentException if the constraints for getProxyClass
+   *         were violated, except for problems with null
+   * @throws NullPointerException if `interfaces' is null or contains
+   *         a null entry, or if handler is null
+   * @see #HAVE_NATIVE_GET_PROXY_DATA
+   * @see #getProxyClass(ClassLoader, Class[])
+   * @see #getProxyClass(ClassLoader, Class[])
+   * @see Proxy.ProxyData#getProxyData(Proxy.ProxyType)
+   */
+  static native Proxy.ProxyData getProxyData(ClassLoader loader,
+                                             Class[] interfaces);
+
+  /**
+   * Optional native method to replace (and speed up) the pure Java
+   * implementation of generateProxyClass.  Only needed if
+   * Configuration.HAVE_NATIVE_GENERATE_PROXY_CLASS is true. The native
+   * code may safely assume that a new Class must be created, and that
+   * the ProxyData object does not describe any existing class.
+   *
+   * @param loader the class loader to define the proxy class in; null
+   *        implies the bootstrap class loader
+   * @param data the struct of information to convert to a Class. This
+   *        has already been verified for all problems except exceeding
+   *        VM limitations
+   * @return the newly generated class
+   * @throws IllegalArgumentException if VM limitations are exceeded
+   * @see #getProxyClass(ClassLoader, Class[])
+   * @see #getProxyClass(ClassLoader, Class[])
+   */
+  static native Class generateProxyClass(ClassLoader loader,
+                                         Proxy.ProxyData data);
+}
diff --git a/libjava/classpath/vm/reference/java/net/VMInetAddress.java b/libjava/classpath/vm/reference/java/net/VMInetAddress.java
new file mode 100644
index 000000000..a99c216b9
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/net/VMInetAddress.java
@@ -0,0 +1,97 @@
+/* VMInetAddress.java -- Class to model an Internet address
+   Copyright (C) 2005  Free Software Foundation, Inc.
+
+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 java.net;
+
+import gnu.classpath.Configuration;
+
+import java.io.Serializable;
+
+class VMInetAddress implements Serializable
+{
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      System.loadLibrary("javanet");
+  }
+
+  /**
+   * This method looks up the hostname of the local machine
+   * we are on.  If the actual hostname cannot be determined, then the
+   * value "localhost" will be used.  This native method wrappers the
+   * "gethostname" function.
+   *
+   * @return The local hostname.
+   */
+  public static native String getLocalHostname();
+
+  /**
+   * Returns the value of the special address INADDR_ANY
+   */
+  public static native byte[] lookupInaddrAny() throws UnknownHostException;
+
+  /**
+   * This method returns the hostname for a given IP address.  It will
+   * throw an UnknownHostException if the hostname cannot be determined.
+   *
+   * @param ip The IP address as a byte array
+   *
+   * @return The hostname
+   *
+   * @exception UnknownHostException If the reverse lookup fails
+   */
+  public static native String getHostByAddr(byte[] ip)
+    throws UnknownHostException;
+
+  /**
+   * Returns a list of all IP addresses for a given hostname.  Will throw
+   * an UnknownHostException if the hostname cannot be resolved.
+   */
+  public static native byte[][] getHostByName(String hostname)
+    throws UnknownHostException;
+
+  /**
+   * Return the IP address represented by a literal address.
+   * Will return null if the literal address is not valid.
+   *
+   * @param address the name of the host
+   *
+   * @return The IP address as a byte array
+   */
+  public static native byte[] aton(String address);
+}
diff --git a/libjava/classpath/vm/reference/java/net/VMNetworkInterface.java b/libjava/classpath/vm/reference/java/net/VMNetworkInterface.java
new file mode 100644
index 000000000..fca0c525a
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/net/VMNetworkInterface.java
@@ -0,0 +1,131 @@
+/* VMNetworkInterface.java --
+   Copyright (C) 2005, 2008  Free Software Foundation, Inc.
+
+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 java.net;
+
+import gnu.classpath.Configuration;
+
+import java.nio.ByteBuffer;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * This class models a network interface on the host computer.  A network
+ * interface contains a name (typically associated with a specific
+ * hardware adapter) and a list of addresses that are bound to it.
+ * For example, an ethernet interface may be named "eth0" and have the
+ * address 192.168.1.101 assigned to it.
+ *
+ * @author Michael Koch (konqueror@gmx.de)
+ * @since 1.4
+ */
+final class VMNetworkInterface
+{
+  String name;
+  Set addresses;
+
+  VMNetworkInterface(String name)
+  {
+    this.name = name;
+    addresses = new HashSet();
+  }
+
+  /**
+   * Creates a dummy instance which represents any network
+   * interface.
+   */
+  public VMNetworkInterface()
+  {
+    addresses = new HashSet();
+    try
+      {
+        addresses.add(InetAddress.getByName("0.0.0.0"));
+      }
+    catch (UnknownHostException _)
+      {
+        // Cannot happen.
+      }
+  }
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      System.loadLibrary("javanet");
+
+    initIds();
+  }
+
+  private static native void initIds();
+
+  /**
+   * Return a list of VM network interface objects.
+   *
+   * @return The list of network interfaces.
+   * @throws SocketException
+   */
+  public static native VMNetworkInterface[] getVMInterfaces()
+    throws SocketException;
+
+  private void addAddress(ByteBuffer addr)
+    throws SocketException, UnknownHostException
+  {
+    if (addr.remaining() == 4)
+      {
+        byte[] ipv4 = new byte[4];
+        addr.get(ipv4);
+        addresses.add(Inet4Address.getByAddress(ipv4));
+      }
+    else if (addr.remaining() == 16)
+      {
+        byte[] ipv6 = new byte[16];
+        addr.get(ipv6);
+        addresses.add(Inet6Address.getByAddress(ipv6));
+      }
+    else
+      throw new SocketException("invalid interface address");
+  }
+
+  static native boolean isUp(String name) throws SocketException;
+
+  static native boolean isLoopback(String name) throws SocketException;
+
+  static native boolean isPointToPoint(String name) throws SocketException;
+
+  static native boolean supportsMulticast(String name) throws SocketException;
+
+}
diff --git a/libjava/classpath/vm/reference/java/net/VMURLConnection.java b/libjava/classpath/vm/reference/java/net/VMURLConnection.java
new file mode 100644
index 000000000..19bf5814e
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/net/VMURLConnection.java
@@ -0,0 +1,79 @@
+/* VMURLConnection - VM code for URLConnection
+   Copyright (C) 2006  Free Software Foundation, Inc.
+
+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 java.net;
+
+import gnu.classpath.Configuration;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+final class VMURLConnection
+{
+  public static final int LENGTH = 1024;
+
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      System.loadLibrary("javanet");
+    init();
+  }
+
+  private static native void init();
+
+  private static native String guessContentTypeFromBuffer(byte[] b, int valid);
+
+  /**
+   * This is called from URLConnection to guess the mime type of a
+   * stream.  This method may return null to indicate that it could
+   * not guess a type.
+   */
+  static String guessContentTypeFromStream(InputStream is)
+    throws IOException
+  {
+    if (! is.markSupported())
+      return null;
+    is.mark(LENGTH);
+    byte[] bytes = new byte[LENGTH];
+    int r = is.read(bytes);
+    if (r < 0)
+      return null;
+    is.reset();
+    return guessContentTypeFromBuffer(bytes, r);
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/nio/VMDirectByteBuffer.java b/libjava/classpath/vm/reference/java/nio/VMDirectByteBuffer.java
new file mode 100644
index 000000000..93a83883a
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/nio/VMDirectByteBuffer.java
@@ -0,0 +1,63 @@
+/* VMDirectByteBuffer.java --
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+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 java.nio;
+
+import gnu.classpath.Configuration;
+import gnu.classpath.Pointer;
+
+final class VMDirectByteBuffer
+{
+  static
+  {
+    // load the shared library needed for native methods.
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javanio");
+      }
+  }
+
+  static native Pointer allocate (int capacity);
+  static native void free(Pointer address);
+  static native byte get(Pointer address, int index);
+  static native void get(Pointer address, int index, byte[] dst, int offset, int length);
+  static native void put(Pointer address, int index, byte value);
+  static native void put(Pointer address, int index, byte[] src, int offset, int length);
+  static native Pointer adjustAddress(Pointer address, int offset);
+  static native void shiftDown(Pointer address, int dst_offset, int src_offset, int count);
+}
diff --git a/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java b/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java
new file mode 100644
index 000000000..05b1441c0
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java
@@ -0,0 +1,116 @@
+/* VMChannels.java --
+   Copyright (C) 2005  Free Software Foundation, Inc.
+
+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 java.nio.channels;
+
+import gnu.java.nio.ChannelInputStream;
+import gnu.java.nio.ChannelOutputStream;
+import gnu.java.nio.FileChannelImpl;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+final class VMChannels
+{
+  /**
+   * This class isn't intended to be instantiated.
+   */
+  private VMChannels()
+  {
+    // Do nothing here.
+  }
+
+  private static Object createStream(Class streamClass, Channel ch)
+  {
+    try
+      {
+        Class[] argTypes = new Class[1];
+        argTypes[0] = FileChannelImpl.class;
+        Constructor constructor =
+          streamClass.getDeclaredConstructor(argTypes);
+        constructor.setAccessible(true);
+        Object[] args = new Object[1];
+        args[0] = ch;
+        return constructor.newInstance(args);
+      }
+    catch (IllegalAccessException e)
+      {
+        // Ignored.
+      }
+    catch (InstantiationException e)
+      {
+        // Ignored.
+      }
+    catch (InvocationTargetException e)
+      {
+        // Ignored.
+      }
+    catch (NoSuchMethodException e)
+      {
+        // Ignored.
+      }
+
+    return null;
+  }
+
+  /**
+   * Constructs a stream that reads bytes from the given channel.
+   */
+  static InputStream newInputStream(ReadableByteChannel ch)
+  {
+    if (ch instanceof FileChannelImpl)
+      return (FileInputStream) createStream(FileInputStream.class, ch);
+
+    return  new ChannelInputStream(ch);
+  }
+
+  /**
+   * Constructs a stream that writes bytes to the given channel.
+   */
+  static OutputStream newOutputStream(WritableByteChannel ch)
+  {
+    if (ch instanceof FileChannelImpl)
+      return (FileOutputStream) createStream(FileOutputStream.class, ch);
+
+    return new ChannelOutputStream(ch);
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/security/VMAccessController.java b/libjava/classpath/vm/reference/java/security/VMAccessController.java
new file mode 100644
index 000000000..9299e6f84
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/security/VMAccessController.java
@@ -0,0 +1,280 @@
+/* VMAccessController.java -- VM-specific access controller methods.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This program 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.
+
+This program 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 this program; 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 java.security;
+
+import java.util.HashSet;
+import java.util.LinkedList;
+
+final class VMAccessController
+{
+
+  // Fields.
+  // -------------------------------------------------------------------------
+
+  /**
+   * This is a per-thread stack of AccessControlContext objects (which can
+   * be null) for each call to AccessController.doPrivileged in each thread's
+   * call stack. We use this to remember which context object corresponds to
+   * which call.
+   */
+  private static final ThreadLocal contexts = new ThreadLocal();
+
+  /**
+   * This is a Boolean that, if set, tells getContext that it has already
+   * been called once, allowing us to handle recursive permission checks
+   * caused by methods getContext calls.
+   */
+  private static final ThreadLocal inGetContext = new ThreadLocal();
+
+  /**
+   * And we return this all-permissive context to ensure that privileged
+   * methods called from getContext succeed.
+   */
+  private static final AccessControlContext DEFAULT_CONTEXT;
+  static
+  {
+    CodeSource source = new CodeSource(null, null);
+    Permissions permissions = new Permissions();
+    permissions.add(new AllPermission());
+    ProtectionDomain[] domain = new ProtectionDomain[] {
+      new ProtectionDomain(source, permissions)
+    };
+    DEFAULT_CONTEXT = new AccessControlContext(domain);
+  }
+
+  private static final boolean DEBUG = gnu.classpath.Configuration.DEBUG;
+  private static void debug(String msg)
+  {
+    System.err.print(">>> VMAccessController: ");
+    System.err.println(msg);
+  }
+
+  // Constructors.
+  // -------------------------------------------------------------------------
+
+  private VMAccessController() { }
+
+  // Class methods.
+  // -------------------------------------------------------------------------
+
+  /**
+   * Relate a class (which should be an instance of {@link PrivilegedAction}
+   * with an access control context. This method is used by {@link
+   * AccessController#doPrivileged(java.security.PrivilegedAction,java.security.AccessControlContext)}
+   * to set up the context that will be returned by {@link #getContext()}.
+   * This method relates the class to the current thread, so contexts
+   * pushed from one thread will not be available to another.
+   *
+   * @param acc The access control context.
+   */
+  static void pushContext (AccessControlContext acc)
+  {
+    if (DEBUG)
+      debug("pushing " + acc);
+    LinkedList stack = (LinkedList) contexts.get();
+    if (stack == null)
+      {
+         if (DEBUG)
+           debug("no stack... creating ");
+        stack = new LinkedList();
+        contexts.set(stack);
+      }
+    stack.addFirst(acc);
+  }
+
+  /**
+   * Removes the relation of a class to an {@link AccessControlContext}.
+   * This method is used by {@link AccessController} when exiting from a
+   * call to {@link
+   * AccessController#doPrivileged(java.security.PrivilegedAction,java.security.AccessControlContext)}.
+   */
+  static void popContext()
+  {
+    if (DEBUG)
+      debug("popping context");
+
+    // Stack should never be null, nor should it be empty, if this method
+    // and its counterpart has been called properly.
+    LinkedList stack = (LinkedList) contexts.get();
+    if (stack != null)
+      {
+        stack.removeFirst();
+        if (stack.isEmpty())
+          contexts.set(null);
+      }
+    else if (DEBUG)
+      {
+        debug("no stack during pop?????");
+      }
+  }
+
+  /**
+   * Examine the method stack of the currently running thread, and create
+   * an {@link AccessControlContext} filled in with the appropriate {@link
+   * ProtectionDomain} objects given this stack.
+   *
+   * @return The context.
+   */
+  static AccessControlContext getContext()
+  {
+    // If we are already in getContext, but called a method that needs
+    // a permission check, return the all-permissive context so methods
+    // called from here succeed.
+    //
+    // XXX is this necessary? We should verify if there are any calls in
+    // the stack below this method that require permission checks.
+    Boolean inCall = (Boolean) inGetContext.get();
+    if (inCall != null && inCall.booleanValue())
+      {
+        if (DEBUG)
+          debug("already in getContext");
+        return DEFAULT_CONTEXT;
+      }
+
+    inGetContext.set(Boolean.TRUE);
+
+    Object[][] stack = getStack();
+    Class[] classes = (Class[]) stack[0];
+    String[] methods = (String[]) stack[1];
+
+    if (DEBUG)
+      debug("got trace of length " + classes.length);
+
+    HashSet domains = new HashSet();
+    HashSet seenDomains = new HashSet();
+    AccessControlContext context = null;
+    int privileged = 0;
+
+    // We walk down the stack, adding each ProtectionDomain for each
+    // class in the call stack. If we reach a call to doPrivileged,
+    // we don't add any more stack frames. We skip the first three stack
+    // frames, since they comprise the calls to getStack, getContext,
+    // and AccessController.getContext.
+    for (int i = 3; i < classes.length && privileged < 2; i++)
+      {
+        Class clazz = classes[i];
+        String method = methods[i];
+
+        if (DEBUG)
+          {
+            debug("checking " + clazz + "." + method);
+            // subject to getClassLoader RuntimePermission
+            debug("loader = " + clazz.getClassLoader());
+          }
+
+        // If the previous frame was a call to doPrivileged, then this is
+        // the last frame we look at.
+        if (privileged == 1)
+          privileged = 2;
+
+        if (clazz.equals (AccessController.class)
+            && method.equals ("doPrivileged"))
+          {
+            // If there was a call to doPrivileged with a supplied context,
+            // return that context. If using JAAS doAs*, it should be
+            // a context with a SubjectDomainCombiner
+            LinkedList l = (LinkedList) contexts.get();
+            if (l != null)
+              context = (AccessControlContext) l.getFirst();
+            privileged = 1;
+          }
+
+        // subject to getProtectionDomain RuntimePermission
+        ProtectionDomain domain = clazz.getProtectionDomain();
+
+        if (domain == null)
+          continue;
+        if (seenDomains.contains(domain))
+          continue;
+        seenDomains.add(domain);
+
+        // Create a static snapshot of this domain, which may change over time
+        // if the current policy changes.
+        domains.add(new ProtectionDomain(domain.getCodeSource(),
+                                         domain.getPermissions()));
+      }
+
+    if (DEBUG)
+      debug("created domains: " + domains);
+
+    ProtectionDomain[] result = (ProtectionDomain[])
+      domains.toArray(new ProtectionDomain[domains.size()]);
+
+    if (context != null)
+      {
+        DomainCombiner dc = context.getDomainCombiner ();
+        // If the supplied context had no explicit DomainCombiner, use
+        // our private version, which computes the intersection of the
+        // context's domains with the derived set.
+        if (dc == null)
+          context = new AccessControlContext
+            (IntersectingDomainCombiner.SINGLETON.combine
+             (result, context.getProtectionDomains ()));
+        // Use the supplied DomainCombiner. This should be secure,
+        // because only trusted code may create an
+        // AccessControlContext with a custom DomainCombiner.
+        else
+          context = new AccessControlContext (result, context, dc);
+      }
+    // No context was supplied. Return the derived one.
+    else
+      context = new AccessControlContext (result);
+
+    inGetContext.set(Boolean.FALSE);
+    return context;
+  }
+
+  /**
+   * Returns a snapshot of the current call stack as a pair of arrays:
+   * the first an array of classes in the call stack, the second an array
+   * of strings containing the method names in the call stack. The two
+   * arrays match up, meaning that method <i>i</i> is declared in class
+   * <i>i</i>. The arrays are clean; it will only contain Java methods,
+   * and no element of the list should be null.
+   *
+   * <p>The default implementation returns an empty stack, which will be
+   * interpreted as having no permissions whatsoever.
+   *
+   * @return A pair of arrays describing the current call stack. The first
+   *    element is an array of Class objects, and the second is an array
+   *    of Strings comprising the method names.
+   */
+  private static Object[][] getStack()
+  {
+    return new Object[][] { new Class[0], new String[0] };
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/security/VMSecureRandom.java b/libjava/classpath/vm/reference/java/security/VMSecureRandom.java
new file mode 100644
index 000000000..bea154977
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/security/VMSecureRandom.java
@@ -0,0 +1,129 @@
+/* VMSecureRandom.java -- random seed generator.
+   Copyright (C) 2006  Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, 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 java.security;
+
+/**
+ * VM-specific methods for generating real (or almost real) random
+ * seeds. VM implementors should write a version of this class that
+ * reads random bytes from some system source.
+ *
+ * <p>The default implementation of this class runs eight threads that
+ * increment counters in a tight loop, and XORs each counter to
+ * produce one byte of seed data. This is not very efficient, and is
+ * not guaranteed to be random (the thread scheduler is probably
+ * deterministic, after all). If possible, VM implementors should
+ * reimplement this class so it obtains a random seed from a system
+ * facility, such as a system entropy gathering device or hardware
+ * random number generator.
+ */
+final class VMSecureRandom
+{
+
+  /**
+   * Generate a random seed. Implementations are free to generate
+   * fewer random bytes than are requested, and leave the remaining
+   * bytes of the destination buffer as zeros. Implementations SHOULD,
+   * however, make a best-effort attempt to satisfy the request.
+   *
+   * @param buffer The destination buffer.
+   * @param offset The offset in the buffer to start putting bytes.
+   * @param length The number of random bytes to generate.
+   */
+  static int generateSeed(byte[] buffer, int offset, int length)
+  {
+    if (length < 0)
+      throw new IllegalArgumentException("length must be nonnegative");
+    if (offset < 0 || offset + length > buffer.length)
+      throw new IndexOutOfBoundsException();
+
+    Spinner[] spinners = new Spinner[8];
+    int n = 0x1;
+    for (int i = 0; i < spinners.length; i++)
+      {
+        spinners[i] = new Spinner((byte) n);
+        Thread t = new Thread(spinners[i]);
+        t.start();
+        n <<= 1;
+      }
+
+    // Wait until at least one spinner has started.
+    while (!(spinners[0].running || spinners[1].running || spinners[2].running
+             || spinners[3].running || spinners[4].running || spinners[5].running
+             || spinners[6].running || spinners[7].running))
+      {
+        Thread.yield();
+      }
+
+    for (int i = offset; i < length; i++)
+      {
+        buffer[i] = (byte) (spinners[0].value ^ spinners[1].value ^ spinners[2].value
+                            ^ spinners[3].value ^ spinners[4].value ^ spinners[5].value
+                            ^ spinners[6].value ^ spinners[7].value);
+        Thread.yield();
+      }
+
+    for (int i = 0; i < spinners.length; i++)
+      spinners[i].stop();
+
+    return length;
+  }
+
+  static class Spinner implements Runnable
+  {
+    volatile byte value;
+    volatile boolean running;
+
+    Spinner(final byte initial)
+    {
+      value = initial;
+    }
+
+    public void run()
+    {
+      running = true;
+      while (running)
+        value++;
+    }
+
+    private void stop()
+    {
+      running = false;
+    }
+  }
+}
diff --git a/libjava/classpath/vm/reference/java/util/VMTimeZone.java b/libjava/classpath/vm/reference/java/util/VMTimeZone.java
new file mode 100644
index 000000000..11061aa32
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/util/VMTimeZone.java
@@ -0,0 +1,300 @@
+/* java.util.VMTimeZone
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007
+   Free Software Foundation, Inc.
+
+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 java.util;
+
+import gnu.classpath.Configuration;
+import gnu.classpath.SystemProperties;
+import gnu.java.util.ZoneInfo;
+import java.util.TimeZone;
+
+import java.io.*;
+
+/**
+ *
+ */
+final class VMTimeZone
+{
+  static
+  {
+    if (Configuration.INIT_LOAD_LIBRARY)
+      {
+        System.loadLibrary("javautil");
+      }
+  }
+
+  /**
+   * This method returns a time zone id string which is in the form
+   * (standard zone name) or (standard zone name)(GMT offset) or
+   * (standard zone name)(GMT offset)(daylight time zone name).  The
+   * GMT offset can be in seconds, or where it is evenly divisible by
+   * 3600, then it can be in hours.  The offset must be the time to
+   * add to the local time to get GMT.  If a offset is given and the
+   * time zone observes daylight saving then the (daylight time zone
+   * name) must also be given (otherwise it is assumed the time zone
+   * does not observe any daylight savings).
+   * <p>
+   * The result of this method is given to the method
+   * TimeZone.getDefaultTimeZone(String) which tries to map the time
+   * zone id to a known TimeZone.  See that method on how the returned
+   * String is mapped to a real TimeZone object.
+   * <p>
+   * The reference implementation which is made for GNU/Posix like
+   * systems calls <code>System.getenv("TZ")</code>,
+   * <code>readTimeZoneFile("/etc/timezone")</code>,
+   * <code>ZoneInfo.readTZFile((String)null, "/etc/localtime")</code>
+   * and finally <code>getSystemTimeZoneId()</code> till a supported
+   * TimeZone is found through
+   * <code>TimeZone.getDefaultTimeZone(String)</code>.
+   * If every method fails <code>null</code> is returned (which means
+   * the TimeZone code will fall back on GMT as default time zone).
+   * <p>
+   * Note that this method is called inside a
+   * <code>AccessController.doPrivileged()</code> block and runs with
+   * the priviliges of the java.util system classes.  It will only be
+   * called when the default time zone is not yet set, the system
+   * property user.timezone isn't set and it is requested for the
+   * first time.
+   */
+  static TimeZone getDefaultTimeZoneId()
+  {
+    TimeZone zone = null;
+
+    // See if TZ environment variable is set and accessible.
+    String tzid = System.getenv("TZ");
+    if (tzid != null && !tzid.equals(""))
+      zone = TimeZone.getDefaultTimeZone(tzid);
+
+    // Try to parse /etc/timezone.
+    if (zone == null)
+      {
+        tzid = readTimeZoneFile("/etc/timezone");
+        if (tzid != null && !tzid.equals(""))
+          zone = TimeZone.getDefaultTimeZone(tzid);
+      }
+
+    // Try to parse /etc/localtime
+    if (zone == null)
+      {
+        zone = ZoneInfo.readTZFile((String) null, "/etc/localtime");
+        if (zone != null)
+          {
+            // Try to find a more suitable ID for the /etc/localtime
+            // timezone.
+            // Sometimes /etc/localtime is a symlink to some
+            // /usr/share/zoneinfo/ file.
+            String id = null;
+            try
+              {
+                id = new File("/etc/localtime").getCanonicalPath();
+                if (id != null)
+                  {
+                    String zoneinfo_dir
+                      = SystemProperties.getProperty("gnu.java.util.zoneinfo.dir");
+                    if (zoneinfo_dir != null)
+                      zoneinfo_dir
+                        = new File(zoneinfo_dir
+                                   + File.separatorChar).getCanonicalPath();
+                    if (zoneinfo_dir != null && id.startsWith(zoneinfo_dir))
+                      {
+                        int pos = zoneinfo_dir.length();
+                        while (pos < id.length()
+                               && id.charAt(pos) == File.separatorChar)
+                          pos++;
+                        if (pos < id.length())
+                          id = id.substring(pos);
+                        else
+                          id = null;
+                      }
+                    else
+                      id = null;
+                  }
+              }
+            catch (IOException ioe)
+              {
+                id = null;
+              }
+
+            if (id == null)
+              id = readSysconfigClockFile("/etc/sysconfig/clock");
+
+            if (id != null)
+              zone.setID(id);
+          }
+      }
+
+    // Try some system specific way
+    if (zone == null)
+      {
+        tzid = getSystemTimeZoneId();
+        if (tzid != null && !tzid.equals(""))
+          zone = TimeZone.getDefaultTimeZone(tzid);
+      }
+
+    return zone;
+  }
+
+  /**
+   * Tries to read the time zone name from a file. Only the first
+   * consecutive letters, digits, slashes, dashes and underscores are
+   * read from the file. If the file cannot be read or an IOException
+   * occurs null is returned.
+   * <p>
+   * The /etc/timezone file is not standard, but a lot of systems have
+   * it. If it exist the first line always contains a string
+   * describing the timezone of the host of domain. Some systems
+   * contain a /etc/TIMEZONE file which is used to set the TZ
+   * environment variable (which is checked before /etc/timezone is
+   * read).
+   */
+  private static String readTimeZoneFile(String file)
+  {
+    File f = new File(file);
+    if (!f.exists())
+      return null;
+
+    InputStreamReader isr = null;
+    try
+      {
+        FileInputStream fis = new FileInputStream(f);
+        BufferedInputStream bis = new BufferedInputStream(fis);
+        isr = new InputStreamReader(bis);
+
+        StringBuffer sb = new StringBuffer();
+        int i = isr.read();
+        while (i != -1)
+          {
+            char c = (char) i;
+            if (Character.isLetter(c) || Character.isDigit(c)
+                || c == '/' || c == '-' || c == '_')
+              {
+                sb.append(c);
+                i = isr.read();
+              }
+            else
+              break;
+          }
+        return sb.toString();
+      }
+    catch (IOException ioe)
+      {
+        // Parse error, not a proper tzfile.
+        return null;
+      }
+    finally
+      {
+        try
+          {
+            if (isr != null)
+              isr.close();
+          }
+        catch (IOException ioe)
+          {
+            // Error while close, nothing we can do.
+          }
+      }
+  }
+
+  /**
+   * Tries to read the time zone name from a file.
+   * If the file cannot be read or an IOException occurs null is returned.
+   * <p>
+   * The /etc/sysconfig/clock file is not standard, but a lot of systems
+   * have it. The file is included by shell scripts and the timezone
+   * name is defined in ZONE variable.
+   * This routine should grok it with or without quotes:
+   * ZONE=America/New_York
+   * or
+   * ZONE="Europe/London"
+   */
+  private static String readSysconfigClockFile(String file)
+  {
+    BufferedReader br = null;
+    try
+      {
+        FileInputStream fis = new FileInputStream(file);
+        BufferedInputStream bis = new BufferedInputStream(fis);
+        br = new BufferedReader(new InputStreamReader(bis));
+
+        for (String line = br.readLine(); line != null; line = br.readLine())
+          {
+            line = line.trim();
+            if (line.length() < 8 || !line.startsWith("ZONE="))
+              continue;
+            int posstart = 6;
+            int posend;
+            if (line.charAt(5) == '"')
+              posend = line.indexOf('"', 6);
+            else if (line.charAt(5) == '\'')
+              posend = line.indexOf('\'', 6);
+            else
+              {
+                posstart = 5;
+                posend = line.length();
+              }
+            if (posend < 0)
+              return null;
+            return line.substring(posstart, posend);
+          }
+        return null;
+      }
+    catch (IOException ioe)
+      {
+        // Parse error, not a proper tzfile.
+        return null;
+      }
+    finally
+      {
+        try
+          {
+            if (br != null)
+              br.close();
+          }
+        catch (IOException ioe)
+          {
+            // Error while close, nothing we can do.
+          }
+      }
+  }
+
+  /**
+   * Tries to get the system time zone id through native code.
+   */
+  private static native String getSystemTimeZoneId();
+}
diff --git a/libjava/classpath/vm/reference/sun/misc/Unsafe.java b/libjava/classpath/vm/reference/sun/misc/Unsafe.java
new file mode 100644
index 000000000..e316bdb8d
--- /dev/null
+++ b/libjava/classpath/vm/reference/sun/misc/Unsafe.java
@@ -0,0 +1,328 @@
+/* Unsafe.java - Unsafe operations needed for concurrency
+   Copyright (C) 2006 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 sun.misc;
+
+import java.lang.reflect.Field;
+
+/**
+ * This class should provide access to low-level operations and its
+ * use should be limited to trusted code.  Fields can be accessed using
+ * memory addresses, with undefined behaviour occurring if invalid memory
+ * addresses are given.
+ *
+ * @author Tom Tromey (tromey@redhat.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ */
+public class Unsafe
+{
+  // Singleton class.
+  private static Unsafe unsafe = new Unsafe();
+
+  /**
+   * Private default constructor to prevent creation of an arbitrary
+   * number of instances.
+   */
+  private Unsafe()
+  {
+  }
+
+  /**
+   * Retrieve the singleton instance of <code>Unsafe</code>.  The calling
+   * method should guard this instance from untrusted code, as it provides
+   * access to low-level operations such as direct memory access.
+   *
+   * @throws SecurityException if a security manager exists and prevents
+   *                           access to the system properties.
+   */
+  public static Unsafe getUnsafe()
+  {
+    SecurityManager sm = System.getSecurityManager();
+    if (sm != null)
+      sm.checkPropertiesAccess();
+    return unsafe;
+  }
+
+  /**
+   * Returns the memory address offset of the given static field.
+   * The offset is merely used as a means to access a particular field
+   * in the other methods of this class.  The value is unique to the given
+   * field and the same value should be returned on each subsequent call.
+   *
+   * @param field the field whose offset should be returned.
+   * @return the offset of the given field.
+   */
+  public native long objectFieldOffset(Field field);
+
+  /**
+   * Compares the value of the integer field at the specified offset
+   * in the supplied object with the given expected value, and updates
+   * it if they match.  The operation of this method should be atomic,
+   * thus providing an uninterruptible way of updating an integer field.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the integer field within <code>obj</code>.
+   * @param expect the expected value of the field.
+   * @param update the new value of the field if it equals <code>expect</code>.
+   * @return true if the field was changed.
+   */
+  public native boolean compareAndSwapInt(Object obj, long offset,
+                                          int expect, int update);
+
+  /**
+   * Compares the value of the long field at the specified offset
+   * in the supplied object with the given expected value, and updates
+   * it if they match.  The operation of this method should be atomic,
+   * thus providing an uninterruptible way of updating a long field.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @param expect the expected value of the field.
+   * @param update the new value of the field if it equals <code>expect</code>.
+   * @return true if the field was changed.
+   */
+  public native boolean compareAndSwapLong(Object obj, long offset,
+                                           long expect, long update);
+
+  /**
+   * Compares the value of the object field at the specified offset
+   * in the supplied object with the given expected value, and updates
+   * it if they match.  The operation of this method should be atomic,
+   * thus providing an uninterruptible way of updating an object field.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the object field within <code>obj</code>.
+   * @param expect the expected value of the field.
+   * @param update the new value of the field if it equals <code>expect</code>.
+   * @return true if the field was changed.
+   */
+  public native boolean compareAndSwapObject(Object obj, long offset,
+                                             Object expect, Object update);
+
+  /**
+   * Sets the value of the integer field at the specified offset in the
+   * supplied object to the given value.  This is an ordered or lazy
+   * version of <code>putIntVolatile(Object,long,int)</code>, which
+   * doesn't guarantee the immediate visibility of the change to other
+   * threads.  It is only really useful where the integer field is
+   * <code>volatile</code>, and is thus expected to change unexpectedly.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the integer field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putIntVolatile(Object,long,int)
+   */
+  public native void putOrderedInt(Object obj, long offset, int value);
+
+  /**
+   * Sets the value of the long field at the specified offset in the
+   * supplied object to the given value.  This is an ordered or lazy
+   * version of <code>putLongVolatile(Object,long,long)</code>, which
+   * doesn't guarantee the immediate visibility of the change to other
+   * threads.  It is only really useful where the long field is
+   * <code>volatile</code>, and is thus expected to change unexpectedly.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putLongVolatile(Object,long,long)
+   */
+  public native void putOrderedLong(Object obj, long offset, long value);
+
+  /**
+   * Sets the value of the object field at the specified offset in the
+   * supplied object to the given value.  This is an ordered or lazy
+   * version of <code>putObjectVolatile(Object,long,Object)</code>, which
+   * doesn't guarantee the immediate visibility of the change to other
+   * threads.  It is only really useful where the object field is
+   * <code>volatile</code>, and is thus expected to change unexpectedly.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the object field within <code>obj</code>.
+   * @param value the new value of the field.
+   */
+  public native void putOrderedObject(Object obj, long offset, Object value);
+
+  /**
+   * Sets the value of the integer field at the specified offset in the
+   * supplied object to the given value, with volatile store semantics.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the integer field within <code>obj</code>.
+   * @param value the new value of the field.
+   */
+  public native void putIntVolatile(Object obj, long offset, int value);
+
+  /**
+   * Retrieves the value of the integer field at the specified offset in the
+   * supplied object with volatile load semantics.
+   *
+   * @param obj the object containing the field to read.
+   * @param offset the offset of the integer field within <code>obj</code>.
+   */
+  public native int getIntVolatile(Object obj, long offset);
+
+  /**
+   * Sets the value of the long field at the specified offset in the
+   * supplied object to the given value, with volatile store semantics.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putLong(Object,long,long)
+   */
+  public native void putLongVolatile(Object obj, long offset, long value);
+
+  /**
+   * Sets the value of the long field at the specified offset in the
+   * supplied object to the given value.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putLongVolatile(Object,long,long)
+   */
+  public native void putLong(Object obj, long offset, long value);
+
+  /**
+   * Retrieves the value of the long field at the specified offset in the
+   * supplied object with volatile load semantics.
+   *
+   * @param obj the object containing the field to read.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @see #getLong(Object,long)
+   */
+  public native long getLongVolatile(Object obj, long offset);
+
+  /**
+   * Retrieves the value of the long field at the specified offset in the
+   * supplied object.
+   *
+   * @param obj the object containing the field to read.
+   * @param offset the offset of the long field within <code>obj</code>.
+   * @see #getLongVolatile(Object,long)
+   */
+  public native long getLong(Object obj, long offset);
+
+  /**
+   * Sets the value of the object field at the specified offset in the
+   * supplied object to the given value, with volatile store semantics.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the object field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putObject(Object,long,Object)
+   */
+  public native void putObjectVolatile(Object obj, long offset, Object value);
+
+  /**
+   * Sets the value of the object field at the specified offset in the
+   * supplied object to the given value.
+   *
+   * @param obj the object containing the field to modify.
+   * @param offset the offset of the object field within <code>obj</code>.
+   * @param value the new value of the field.
+   * @see #putObjectVolatile(Object,long,Object)
+   */
+  public native void putObject(Object obj, long offset, Object value);
+
+  /**
+   * Retrieves the value of the object field at the specified offset in the
+   * supplied object with volatile load semantics.
+   *
+   * @param obj the object containing the field to read.
+   * @param offset the offset of the object field within <code>obj</code>.
+   */
+  public native Object getObjectVolatile(Object obj, long offset);
+
+  /**
+   * Returns the offset of the first element for a given array class.
+   * To access elements of the array class, this value may be used along
+   * with that returned by
+   * <a href="#arrayIndexScale"><code>arrayIndexScale</code></a>,
+   * if non-zero.
+   *
+   * @param arrayClass the class for which the first element's address should
+   *                   be obtained.
+   * @return the offset of the first element of the array class.
+   * @see arrayIndexScale(Class)
+   */
+  public native int arrayBaseOffset(Class arrayClass);
+
+  /**
+   * Returns the scale factor used for addressing elements of the supplied
+   * array class.  Where a suitable scale factor can not be returned (e.g.
+   * for primitive types), zero should be returned.  The returned value
+   * can be used with
+   * <a href="#arrayBaseOffset"><code>arrayBaseOffset</code></a>
+   * to access elements of the class.
+   *
+   * @param arrayClass the class whose scale factor should be returned.
+   * @return the scale factor, or zero if not supported for this array class.
+   */
+  public native int arrayIndexScale(Class arrayClass);
+
+  /**
+   * Releases the block on a thread created by
+   * <a href="#park"><code>park</code></a>.  This method can also be used
+   * to terminate a blockage caused by a prior call to <code>park</code>.
+   * This operation is unsafe, as the thread must be guaranteed to be
+   * live.  This is true of Java, but not native code.
+   *
+   * @param thread the thread to unblock.
+   */
+  public native void unpark(Object thread);
+
+  /**
+   * Blocks the thread until a matching
+   * <a href="#unpark"><code>unpark</code></a> occurs, the thread is
+   * interrupted or the optional timeout expires.  If an <code>unpark</code>
+   * call has already occurred, this also counts.  A timeout value of zero
+   * is defined as no timeout.  When <code>isAbsolute</code> is
+   * <code>true</code>, the timeout is in milliseconds relative to the
+   * epoch.  Otherwise, the value is the number of nanoseconds which must
+   * occur before timeout.  This call may also return spuriously (i.e.
+   * for no apparent reason).
+   *
+   * @param isAbsolute true if the timeout is specified in milliseconds from
+   *                   the epoch.
+   * @param time either the number of nanoseconds to wait, or a time in
+   *             milliseconds from the epoch to wait for.
+   */
+  public native void park(boolean isAbsolute, long time);
+
+}
diff --git a/libjava/classpath/vm/reference/sun/reflect/Reflection.java b/libjava/classpath/vm/reference/sun/reflect/Reflection.java
new file mode 100644
index 000000000..ddbb69d16
--- /dev/null
+++ b/libjava/classpath/vm/reference/sun/reflect/Reflection.java
@@ -0,0 +1,51 @@
+/* Reflection.java - JSR 166 reflection hooks
+   Copyright (C) 2006 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 sun.reflect;
+
+import gnu.classpath.VMStackWalker;
+
+public class Reflection
+{
+  /**
+   * A stack-walking wrapper method used by the JSR 166 RI.
+   */
+  public static Class getCallerClass(int depth)
+  {
+    return VMStackWalker.getClassContext()[depth];
+  }
+}
diff --git a/libjava/classpath/vm/reference/sun/reflect/misc/ReflectUtil.java b/libjava/classpath/vm/reference/sun/reflect/misc/ReflectUtil.java
new file mode 100644
index 000000000..aca365d6b
--- /dev/null
+++ b/libjava/classpath/vm/reference/sun/reflect/misc/ReflectUtil.java
@@ -0,0 +1,113 @@
+/* ReflectUtil.java - JSR 166 reflection hooks
+   Copyright (C) 2006 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 sun.reflect.misc;
+
+import java.lang.reflect.Modifier;
+
+public class ReflectUtil
+{
+  // We use this inaccessible inner class as an argument type
+  // in verifyMemberAccess.  All current users of this method
+  // in the JSR 166 RI pass 'null' for this argument, and
+  // consequently we don't know what it means.  Using a funny
+  // type like this for the argument means that if the RI changes,
+  // we will see a compilation error.
+  private static class MustBeNull
+  {
+  }
+
+  /**
+   * Check if the current thread is allowed to access the package of
+   * the declaringClass.
+   *
+   * @param declaringClass class name to check access to
+   * @throws SecurityException if permission is denied
+   * @throws NullPointerException if declaringClass is null
+   */
+  public static void checkPackageAccess(Class declaringClass)
+  {
+    SecurityManager sm;
+    if ((sm = System.getSecurityManager()) != null)
+      {
+        while (declaringClass.isArray())
+          declaringClass = declaringClass.getComponentType();
+        String name = declaringClass.getName();
+        int i = name.lastIndexOf('.');
+        if (i != -1) // if declaringClass is a member of a package
+          {
+            name = name.substring(0, i);
+            sm.checkPackageAccess(name);
+          }
+      }
+  }
+
+  /**
+   * Perform access checks on a member of a class.  This API is
+   * derived from the public domain code in the JSR 166 reference
+   * implementation.
+   * @param caller the class requesting access to the member
+   * @param declarer the declaring class of the member
+   * @param ignored unknown parameter; always null
+   * @param modifiers the modifiers on the member
+   * @return true if access is granted, false otherwise
+   */
+  public static void ensureMemberAccess(Class caller,
+                                        Class declarer,
+                                        MustBeNull ignored,
+                                        int modifiers)
+  {
+    // Same class, always ok.
+    if (caller == declarer)
+      return;
+    // Public access is ok.
+    if ((modifiers & Modifier.PUBLIC) != 0)
+      return;
+    // Protected access and request comes from
+    // a subclass of the declarer -- ok.
+    if ((modifiers & Modifier.PROTECTED) != 0
+        && declarer.isAssignableFrom(caller))
+      return;
+    // Package-private access, or protected access,
+    // and the packages are the same --ok.
+    if ((modifiers & Modifier.PRIVATE) == 0
+        && caller.getPackage() == declarer.getPackage())
+      return;
+    // Otherwise, no.
+    throw new IllegalAccessError();
+  }
+}