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.

5 files changed, 764 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/java/rmi/dgc/DGCImpl.java b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl.java
new file mode 100644
index 000000000..5efbf2796
--- /dev/null
+++ b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl.java
@@ -0,0 +1,182 @@
+/* DGCImpl.java --
+   Copyright (c) 1996, 1997, 1998, 1999, 2002, 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.rmi.dgc;
+
+import gnu.java.rmi.server.UnicastServer;
+import gnu.java.rmi.server.UnicastServerRef;
+
+import java.rmi.RemoteException;
+import java.rmi.dgc.DGC;
+import java.rmi.dgc.Lease;
+import java.rmi.dgc.VMID;
+import java.rmi.server.ObjID;
+import java.rmi.server.RMISocketFactory;
+import java.util.Collection;
+import java.util.TimerTask;
+
+/**
+ * The DGC implementation is used for the server side during the distributed
+ * garbage collection. This interface contains the two methods: dirty and clean.
+ * A dirty call is made when a remote reference is unmarshaled in a client. A
+ * corresponding clean call is made by client it no longer uses that remote
+ * reference. A reference to a remote object is also automatically released
+ * after so called lease period that starts after the dirty call is received. It
+ * is the client's responsibility to renew the leases, by making additional
+ * dirty calls before such leases expire.
+ */
+public class DGCImpl
+    extends UnicastServerRef
+    implements DGC
+{
+  /*
+   * The DGCImpl extends UnicastServerRef and not UnicastRemoteObject, because
+   * UnicastRemoteObject must exportObject automatically.
+   */
+
+  /**
+   * Use the serial version UID for interoperability.
+   */
+  private static final long serialVersionUID = 1;
+
+  /**
+   * Protects the array of object Id's for the scheduled period of time
+   * (lease). After the time expires, the protector is automatically discarded,
+   * making the references unprotected and hence applicable for the garbage
+   * collection.
+   */
+  class RefProtector extends TimerTask
+  {
+    /**
+     * The corresponding server references to protect. Each Id may contain
+     * multiple references that are stored to collection.
+     */
+    Collection[] references;
+
+    /**
+     * Create the new instance of the reference protector that protects the
+     * given array of ids and exists for the given period of time.
+     *
+     * @param ids the ids to protect.
+     */
+    RefProtector(ObjID[] ids, long timeToLive)
+    {
+      references = new Collection[ids.length];
+      for (int i = 0; i < ids.length; i++)
+        {
+          references[i] = UnicastServer.getExported(ids[i]);
+        }
+
+      // Schedule the existence.
+      LeaseRenewingTask.timer.schedule(this, timeToLive);
+    }
+
+    /**
+     * Break all links, ensuring easy collection of the references by the gc.
+     */
+    public void run()
+    {
+      for (int i = 0; i < references.length; i++)
+        {
+          references[i].clear();
+          references[i] = null;
+        }
+    }
+  }
+
+  /**
+   * This defauld lease value is used if the lease value, passed to the
+   * {@link #dirty} is equal to zero.
+   */
+  static final long LEASE_VALUE = 600000L;
+
+  /**
+   * Create the new DGC implementation.
+   *
+   * @throws RemoteException if the super constructor throws or the
+   * socket factory fails.
+   */
+  public DGCImpl() throws RemoteException
+  {
+    super(new ObjID(ObjID.DGC_ID), 0, RMISocketFactory.getSocketFactory());
+  }
+
+  /**
+   * Mark the given objects referecnes as used on the client side.
+   *
+   * @param ids the ids of the used objects.
+   * @param sequenceNum the number of the call (used to detect and discard late
+   *          calls).
+   * @param lease the requested lease
+   * @return the granted lease
+   */
+  public Lease dirty(ObjID[] ids, long sequenceNum, Lease lease)
+      throws RemoteException
+  {
+    // We do not fill in VMID because in this implementation it is not used.
+    long leaseValue = lease.getValue();
+
+    // Grant the maximal default lease time if the passed value is zero.
+    if (leaseValue <= 0)
+      leaseValue = LEASE_VALUE;
+
+    // Create (and shedule of the given existence) the new reference
+    // protector.
+    new RefProtector(ids, leaseValue);
+
+    lease = new Lease(lease.getVMID(), leaseValue);
+    return lease;
+  }
+
+  /**
+   * Mark the given objects as no longer used on the client side.
+   *
+   * @param ids the ids of the objects that are no longer used.
+   * @param sequenceNum the number of the call (used to detect and discard late
+   *          calls)
+   * @param vmid the VMID of the client.
+   * @param strong make the "strong" clean call.
+   */
+  public void clean(ObjID[] ids, long sequenceNum, VMID vmid, boolean strong)
+      throws RemoteException
+  {
+    // Not implemented
+    // TODO implement
+  }
+
+} // End of DGCImpl
diff --git a/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Skel.java b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Skel.java
new file mode 100644
index 000000000..a40b48ca0
--- /dev/null
+++ b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Skel.java
@@ -0,0 +1,144 @@
+/* DGCImpl_Skel.java
+   Copyright (C) 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. */
+
+
+// Skel class generated by rmic - DO NOT EDIT!
+
+package gnu.java.rmi.dgc;
+
+public final class DGCImpl_Skel
+    implements java.rmi.server.Skeleton
+{
+    private static final long interfaceHash = -669196253586618813L;
+
+    private static final java.rmi.server.Operation[] operations = {
+        new java.rmi.server.Operation("void clean(java.rmi.server.ObjID[], long, java.rmi.dgc.VMID, boolean"),
+        new java.rmi.server.Operation("java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[], long, java.rmi.dgc.Lease")
+    };
+
+    public java.rmi.server.Operation[] getOperations() {
+        return ((java.rmi.server.Operation[]) operations.clone());
+    }
+
+    public void dispatch(java.rmi.Remote obj, java.rmi.server.RemoteCall call, int opnum, long hash) throws java.lang.Exception {
+        if (opnum < 0) {
+            if (hash == -5803803475088455571L) {
+                opnum = 0;
+            }
+            else if (hash == -8139341527526761862L) {
+                opnum = 1;
+            }
+            else {
+                throw new java.rmi.server.SkeletonMismatchException("interface hash mismatch");
+            }
+        }
+        else if (hash != interfaceHash) {
+            throw new java.rmi.server.SkeletonMismatchException("interface hash mismatch");
+        }
+
+        gnu.java.rmi.dgc.DGCImpl server = (gnu.java.rmi.dgc.DGCImpl)obj;
+        switch (opnum) {
+        case 0:
+        {
+            java.rmi.server.ObjID[] $param_0;
+            long $param_1;
+            java.rmi.dgc.VMID $param_2;
+            boolean $param_3;
+            try {
+                java.io.ObjectInput in = call.getInputStream();
+                $param_0 = (java.rmi.server.ObjID[])in.readObject();
+                $param_1 = (long)in.readLong();
+                $param_2 = (java.rmi.dgc.VMID)in.readObject();
+                $param_3 = (boolean)in.readBoolean();
+
+            }
+            catch (java.io.IOException e) {
+                throw new java.rmi.UnmarshalException("error unmarshalling arguments", e);
+            }
+            catch (java.lang.ClassCastException e) {
+                throw new java.rmi.UnmarshalException("error unmarshalling arguments", e);
+            }
+            finally {
+                call.releaseInputStream();
+            }
+            server.clean($param_0, $param_1, $param_2, $param_3);
+            try {
+                java.io.ObjectOutput out = call.getResultStream(true);
+            }
+            catch (java.io.IOException e) {
+                throw new java.rmi.MarshalException("error marshalling return", e);
+            }
+            break;
+        }
+
+        case 1:
+        {
+            java.rmi.server.ObjID[] $param_0;
+            long $param_1;
+            java.rmi.dgc.Lease $param_2;
+            try {
+                java.io.ObjectInput in = call.getInputStream();
+                $param_0 = (java.rmi.server.ObjID[])in.readObject();
+                $param_1 = (long)in.readLong();
+                $param_2 = (java.rmi.dgc.Lease)in.readObject();
+
+            }
+            catch (java.io.IOException e) {
+                throw new java.rmi.UnmarshalException("error unmarshalling arguments", e);
+            }
+            catch (java.lang.ClassCastException e) {
+                throw new java.rmi.UnmarshalException("error unmarshalling arguments", e);
+            }
+            finally {
+                call.releaseInputStream();
+            }
+            java.rmi.dgc.Lease $result = server.dirty($param_0, $param_1, $param_2);
+            try {
+                java.io.ObjectOutput out = call.getResultStream(true);
+                out.writeObject($result);
+            }
+            catch (java.io.IOException e) {
+                throw new java.rmi.MarshalException("error marshalling return", e);
+            }
+            break;
+        }
+
+        default:
+            throw new java.rmi.UnmarshalException("invalid method number");
+        }
+    }
+}
diff --git a/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Stub.java b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Stub.java
new file mode 100644
index 000000000..dac8b6f4c
--- /dev/null
+++ b/libjava/classpath/gnu/java/rmi/dgc/DGCImpl_Stub.java
@@ -0,0 +1,158 @@
+/* DGCImpl_Stub.java
+   Copyright (C) 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. */
+
+
+// Stub class generated by rmic - DO NOT EDIT!
+
+package gnu.java.rmi.dgc;
+
+public final class DGCImpl_Stub
+    extends java.rmi.server.RemoteStub
+    implements java.rmi.dgc.DGC
+{
+    private static final long serialVersionUID = 2L;
+
+    private static final long interfaceHash = -669196253586618813L;
+
+    private static boolean useNewInvoke;
+
+    private static final java.rmi.server.Operation[] operations = {
+        new java.rmi.server.Operation("void clean(java.rmi.server.ObjID[], long, java.rmi.dgc.VMID, boolean)"),
+        new java.rmi.server.Operation("java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[], long, java.rmi.dgc.Lease)")
+    };
+
+    private static java.lang.reflect.Method $method_clean_0;
+    private static java.lang.reflect.Method $method_dirty_1;
+
+    static {
+        try {
+            java.rmi.server.RemoteRef.class.getMethod("invoke", new java.lang.Class[] { java.rmi.Remote.class, java.lang.reflect.Method.class, java.lang.Object[].class, long.class });
+            useNewInvoke = true;
+            $method_clean_0 = gnu.java.rmi.dgc.DGCImpl.class.getMethod("clean", new java.lang.Class[] {java.rmi.server.ObjID[].class, long.class, java.rmi.dgc.VMID.class, boolean.class});
+            $method_dirty_1 = gnu.java.rmi.dgc.DGCImpl.class.getMethod("dirty", new java.lang.Class[] {java.rmi.server.ObjID[].class, long.class, java.rmi.dgc.Lease.class});
+
+        }
+        catch (java.lang.NoSuchMethodException e) {
+            useNewInvoke = false;
+        }
+    }
+
+    public DGCImpl_Stub() {
+        super();
+    }
+    public DGCImpl_Stub(java.rmi.server.RemoteRef ref) {
+        super(ref);
+    }
+
+    public void clean(java.rmi.server.ObjID[] $param_0, long $param_1, java.rmi.dgc.VMID $param_2, boolean $param_3) throws java.rmi.RemoteException {
+        try {
+            if (useNewInvoke) {
+                ref.invoke(this, $method_clean_0, new java.lang.Object[] {$param_0, new java.lang.Long($param_1), $param_2, Boolean.valueOf($param_3)}, -5803803475088455571L);
+            }
+            else {
+                java.rmi.server.RemoteCall call = ref.newCall((java.rmi.server.RemoteObject)this, operations, 0, interfaceHash);
+                try {
+                    java.io.ObjectOutput out = call.getOutputStream();
+                    out.writeObject($param_0);
+                    out.writeLong($param_1);
+                    out.writeObject($param_2);
+                    out.writeBoolean($param_3);
+                }
+                catch (java.io.IOException e) {
+                    throw new java.rmi.MarshalException("error marshalling arguments", e);
+                }
+                ref.invoke(call);
+                try {
+                    java.io.ObjectInput in = call.getInputStream();
+                }
+                catch (java.io.IOException e) {
+                    throw new java.rmi.UnmarshalException("error unmarshalling return", e);
+                }
+                finally {
+                    ref.done(call);
+                }
+            }
+        }
+        catch (java.rmi.RemoteException e) {
+            throw e;
+        }
+        catch (java.lang.Exception e) {
+            throw new java.rmi.UnexpectedException("undeclared checked exception", e);
+        }
+    }
+
+    public java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[] $param_0, long $param_1, java.rmi.dgc.Lease $param_2) throws java.rmi.RemoteException {
+        try {
+            if (useNewInvoke) {
+                java.lang.Object $result = ref.invoke(this, $method_dirty_1, new java.lang.Object[] {$param_0, new java.lang.Long($param_1), $param_2}, -8139341527526761862L);
+                return ((java.rmi.dgc.Lease)$result);
+            }
+            else {
+                java.rmi.server.RemoteCall call = ref.newCall((java.rmi.server.RemoteObject)this, operations, 1, interfaceHash);
+                try {
+                    java.io.ObjectOutput out = call.getOutputStream();
+                    out.writeObject($param_0);
+                    out.writeLong($param_1);
+                    out.writeObject($param_2);
+                }
+                catch (java.io.IOException e) {
+                    throw new java.rmi.MarshalException("error marshalling arguments", e);
+                }
+                ref.invoke(call);
+                java.rmi.dgc.Lease $result;
+                try {
+                    java.io.ObjectInput in = call.getInputStream();
+                    $result = (java.rmi.dgc.Lease)in.readObject();
+                    return ($result);
+                }
+                catch (java.io.IOException e) {
+                    throw new java.rmi.UnmarshalException("error unmarshalling return", e);
+                }
+                finally {
+                    ref.done(call);
+                }
+            }
+        }
+        catch (java.rmi.RemoteException e) {
+            throw e;
+        }
+        catch (java.lang.Exception e) {
+            throw new java.rmi.UnexpectedException("undeclared checked exception", e);
+        }
+    }
+
+}
diff --git a/libjava/classpath/gnu/java/rmi/dgc/LeaseRenewingTask.java b/libjava/classpath/gnu/java/rmi/dgc/LeaseRenewingTask.java
new file mode 100644
index 000000000..7995af744
--- /dev/null
+++ b/libjava/classpath/gnu/java/rmi/dgc/LeaseRenewingTask.java
@@ -0,0 +1,234 @@
+/* LeaseRenewingTask.java -- The task to renew the lease.
+   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.rmi.dgc;
+
+import gnu.java.rmi.server.UnicastRef;
+
+import java.lang.ref.WeakReference;
+import java.rmi.dgc.Lease;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.WeakHashMap;
+
+/**
+ * The task to renew the lease to some object reference. The UnicastRef
+ * being renewed is stored as a weak reference. So the presence of the
+ * sheduled task does not prevent it from being garbage collected. If the
+ * reference has not been garbage collected, the task is resheduled after
+ * the lease is renewed.
+ *
+ *  @author Audrius Meskauskas (Audriusa@Bioinformatics.org)
+ */
+public class LeaseRenewingTask
+{
+  /**
+   * The sheduled timer task to call the renew() method.
+   */
+  class LeaseTimerTask extends TimerTask
+  {
+    public void run()
+    {
+      renew();
+    }
+  }
+
+  /**
+   * The default requested lease duration time (one minute by default).
+   */
+  public static long REQUEST_LEASE_DURATION =  60000;
+
+  /**
+   * The reference to the UnicastRef that must renew its lease until not
+   * garbage collected. The different members of this list may point to the
+   * different instances of the UnicastRef's, but these references are
+   * pointing to the same remote object (they .equals() returns
+   * true when comparing with each other). Using LinkedList to make
+   * frequent deletions from the middle easy.
+   */
+  LinkedList ref = new LinkedList();
+
+  /**
+   * The granted (or supposed) lease.
+   */
+  Lease lease = new Lease(null, REQUEST_LEASE_DURATION);
+
+  /**
+   * The timer, shared by all lease renewing tasks. The same instance is also
+   * used for the reference protector discarding in DGCImpl.
+   */
+  static Timer timer = new Timer(true);
+
+  /**
+   * Maps the UnicastRef to its renewing task.
+   */
+  static WeakHashMap existingTasks = new WeakHashMap();
+
+  /**
+   * Creates the lease renewing task that renews the lease of the given
+   * UnicastRef until it is not collected. This constructor requests the lease
+   * value from the server and schedules the lease renewal action.
+   *
+   * @param renewIt the reference that must be renewed.
+   */
+  public LeaseRenewingTask(UnicastRef renewIt)
+  {
+    lease = notifyDGC(renewIt);
+    if (lease != null)
+      {
+        schedule(lease);
+        ref.add(new WeakReference(renewIt));
+      }
+  }
+
+  /**
+   * Schedule periodic leases for the given UnicastRef reference.
+   *
+   * @param renewIt the reference, for that the leases must be scheduled.
+   */
+  public static void scheduleLeases(UnicastRef renewIt)
+  {
+    // No need to schedule leases for null.
+    if (renewIt == null)
+      return;
+    try {
+    synchronized (existingTasks)
+      {
+        // Check maybe the task for refreshing this remote object already
+        // exists.
+        LeaseRenewingTask task = (LeaseRenewingTask) existingTasks.get(renewIt);
+
+        if (task != null)
+          {
+            // Extend the reference list only. The scheduling must be
+            // alredy done with the previous lease.
+            synchronized (task.ref)
+              {
+                task.ref.add(new WeakReference(renewIt));
+              }
+          }
+        else
+          existingTasks.put(renewIt, new LeaseRenewingTask(renewIt));
+      }
+    }
+    catch (Exception ex)
+    {
+      InternalError ierr = new InternalError("Lease for "+renewIt);
+      ierr.initCause(ex);
+      throw ierr;
+    }
+  }
+
+  /**
+   * Shedule the renewing call, taking into consideration that the following
+   * lease was granted.
+   *
+   * @param lease the lease that was granted.
+   */
+  public void schedule(Lease lease)
+  {
+    long value = lease.getValue();
+
+    // Shedule a 10 % earlier because some time is needed for the message
+    // to reach the server.
+    long reduced = (value * 90)/100;
+    if (reduced == 0)
+      reduced = value;
+
+    timer.schedule(new LeaseTimerTask(), reduced);
+  }
+
+  /**
+   * Renew the lease.
+   */
+  public void renew()
+  {
+    Object renewIt = null;
+    // Iterate throw the list of associated references. If all are
+    // discarded, there is no need to renew.
+    synchronized (ref)
+    {
+      Iterator iter = ref.iterator();
+      WeakReference w;
+      while (iter.hasNext() && renewIt == null)
+        {
+          w = (WeakReference) iter.next();
+          renewIt = w.get();
+          if (renewIt == null)
+            // Discard the weak reference if its target has been garbage
+            // collected.
+            iter.remove();
+        }
+    }
+
+    if (renewIt!=null)
+      {
+        Lease lease = notifyDGC( (UnicastRef) renewIt);
+
+        // Schedule the next renewing session.
+        if (lease!=null)
+          schedule(lease);
+      }
+      {
+        // All references collected - discard this entry.
+      }
+  }
+
+  /**
+   * Notify DGC that we still hold this reference.
+   *
+   * @param renewIt the reference we still have (must not be null).
+   */
+  public Lease notifyDGC(UnicastRef renewIt)
+  {
+    try
+      {
+        return renewIt.notifyDGC(lease);
+      }
+    catch (Exception e)
+      {
+        // Failed to notify.
+        // TODO Take some relevant action in the case if we failed
+        // to notify the remote object owner.
+        return null;
+      }
+  }
+
+}
diff --git a/libjava/classpath/gnu/java/rmi/dgc/package.html b/libjava/classpath/gnu/java/rmi/dgc/package.html
new file mode 100644
index 000000000..3ed81cfdd
--- /dev/null
+++ b/libjava/classpath/gnu/java/rmi/dgc/package.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<!-- package.html - describes classes in gnu.java.rmi.dgc package.
+   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. -->
+
+<html>
+<head><title>GNU Classpath - gnu.java.rmi.dgc</title></head>
+
+<body>
+<p></p>
+
+</body>
+</html>