/*
 * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
 * Copyright 2007, 2008, 2009 Red Hat, Inc.
 * 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.
 *
 */

  // A frame represents a physical stack frame (an activation).  Frames
  // can be C or Java frames, and the Java frames can be interpreted or
  // compiled.  In contrast, vframes represent source-level activations,
  // so that one physical frame can correspond to multiple source level
  // frames because of inlining.  A frame is comprised of {pc, sp}

 public:
  enum {
    pc_return_offset = 0
  };

 public:
  // Constructors
  frame(intptr_t* sp);

  // accessors for the instance variables
  intptr_t* fp() const
  {
    return (intptr_t *) -1;
  }

#ifdef CC_INTERP
  inline interpreterState get_interpreterState() const;
#endif // CC_INTERP

 public:
  const ZeroFrame *zeroframe() const
  {
    return (ZeroFrame *) sp();
  }

  const EntryFrame *zero_entryframe() const
  {
    return zeroframe()->as_entry_frame();
  }
  const InterpreterFrame *zero_interpreterframe() const
  {
    return zeroframe()->as_interpreter_frame();
  }
  const SharkFrame *zero_sharkframe() const
  {
    return zeroframe()->as_shark_frame();
  }

 public:
  bool is_deoptimizer_frame() const;

 public:
  frame sender_for_deoptimizer_frame(RegisterMap* map) const;