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
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1 files changed, 328 insertions, 0 deletions

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);
+
+}