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diff --git a/libjava/gnu/gcj/jvmti/Breakpoint.java b/libjava/gnu/gcj/jvmti/Breakpoint.java
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+++ b/libjava/gnu/gcj/jvmti/Breakpoint.java
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+// Breakpoint.java -  a base class for interpreter breakpoints
+
+/* Copyright (C) 2006, 2007  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.jvmti;
+
+import gnu.gcj.RawDataManaged;
+
+/**
+ * Base class representing a type of breakpoint in the interpreter.
+ * This class deals with saving insns and installing and
+ * uninstalling insns in the interpreter for all breakpoint classes.
+ *
+ * @author Keith Seitz (keiths@redhat.com)
+ */
+public abstract class Breakpoint
+{
+  // Location of this breakpoint
+  protected long method;
+  protected long location;
+
+  // The original instruction that this breakpoint replaced
+  private RawDataManaged data;
+
+  /**
+   * Constructs a new Breakpoint
+   *
+   * @param method the method in which to set the breakpoint
+   * @param location the location at which to set the breakpoint
+   */
+  public Breakpoint (long method, long location)
+  {
+    this.method = method;
+    this.location = location;
+  }
+
+  public Breakpoint ()
+  {
+  }
+
+  private native void _save_insn ();
+
+  /**
+   * Installs the breakpoint into the interpreter
+   */
+  public native void install ();
+
+  /**
+   * Removes the breakpoint from the interpreter, re-installing
+   * the original instruction.
+   */
+  public native void remove ();
+
+  /**
+   * Returns the original instruction at the location where
+   * this breakpoint was set
+   */
+  public RawDataManaged getInsn ()
+  {
+    return data;
+  }
+
+  /**
+   * Execute the actions of this breakpoint
+   */
+  public abstract void execute ();
+}