/*

 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.

 * Copyright 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef CPU_ZERO_VM_SHARKFRAME_ZERO_HPP

#define CPU_ZERO_VM_SHARKFRAME_ZERO_HPP

#include "oops/method.hpp"

#include "stack_zero.hpp"

// |  ...               |

// +--------------------+  ------------------

// | stack slot n-1     |       low addresses

// |  ...               |

// | stack slot 0       |

// | monitor m-1        |

// |  ...               |

// | monitor 0          |

// | oop_tmp            |

// | method             |

// | unextended_sp      |

// | pc                 |

// | frame_type         |

// | next_frame         |      high addresses

// +--------------------+  ------------------

// |  ...               |

class SharkFrame : public ZeroFrame {

  friend class SharkStack;

 private:

  SharkFrame() : ZeroFrame() {

    ShouldNotCallThis();

  }

 protected:

  enum Layout {

    pc_off = jf_header_words,

    unextended_sp_off,

    method_off,

    oop_tmp_off,

    header_words

  };

 public:

  address pc() const {

    return (address) value_of_word(pc_off);

  }

  void set_pc(address pc) const {

    *((address*) addr_of_word(pc_off)) = pc;

  }

  intptr_t* unextended_sp() const {

    return (intptr_t *) value_of_word(unextended_sp_off);

  }

  Method* method() const {

    return (Method*) value_of_word(method_off);

  }

 public:

  void identify_word(int   frame_index,

                     int   offset,

                     char* fieldbuf,

                     char* valuebuf,

                     int   buflen) const;

};

#endif // CPU_ZERO_VM_SHARKFRAME_ZERO_HPP