--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/MachineDescription.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2000-2001 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.debugger;
+
+import java.io.Serializable;
+
+/** Encapsulates machine-specific information that currently must be
+    exported up to the Java level. Implementations must be
+    serializable. */
+
+public interface MachineDescription extends Serializable {
+  /** Returns the size of an address in bytes. Currently needed to be
+      able to traverse arrays of pointers or oops. */
+  public long getAddressSize();
+
+  /** Returns the size of an address in bytes. Currently needed to be
+      able to traverse arrays of pointers or oops. (FIXME: since we're
+      already reading the Java primitive types' sizes from the remote
+      VM, it would be nice to remove this routine, using a similar
+      mechanism to how the TypeDataBase deals with primitive types.) */
+  public long getOopSize();
+
+  /** Returns the maximum value of the C integer type with the given
+      size in bytes and signedness. Throws IllegalArgumentException if
+      the size in bytes is not legal for a C type (or can not be
+      handled by this system). Note that the current implementation
+      does not currently handle unsigned 8-byte longs properly. */
+  public long cIntegerTypeMaxValue(long sizeInBytes, boolean isUnsigned);
+
+  /** Returns the minimum value of the C integer type with the given
+      size in bytes and signedness. Throws IllegalArgumentException if
+      the size in bytes is not legal for a C type (or can not be
+      handled by this system). */
+  public long cIntegerTypeMinValue(long sizeInBytes, boolean isUnsigned);
+
+  /** Indicates whether the CPU is big- or little-endian. This
+      information is typically only needed by the Debugger
+      implementation. */
+  public boolean isBigEndian();
+
+  /** Indicates whether the underlying machine supports the LP64 data
+      model (currently only SPARC/64). */
+  public boolean isLP64();
+}