src/hotspot/cpu/zero/frame_zero.hpp

/*
 * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2007, 2008, 2009, 2010 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
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 *
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 * 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.
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#ifndef CPU_ZERO_FRAME_ZERO_HPP
#define CPU_ZERO_FRAME_ZERO_HPP

// A frame represents a physical stack frame on the Zero stack.

 public:
  enum {
    pc_return_offset = 0,
    metadata_words   = 0,
    // size, in words, of metadata at frame bottom, i.e. it is not part of the
    // caller/callee overlap
    metadata_words_at_bottom                         = metadata_words,
    // size, in words, of frame metadata at the frame top, i.e. it is located
    // between a callee frame and its stack arguments, where it is part
    // of the caller/callee overlap
    metadata_words_at_top                            = 0,
    frame_alignment  = 16,
    // size, in words, of maximum shift in frame position due to alignment
    align_wiggle     =  1
  };

  // Constructor
 public:
  frame(ZeroFrame* zeroframe, intptr_t* sp);

 private:
  ZeroFrame* _zeroframe;

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

  intptr_t* fp() const {
    return (intptr_t *) zeroframe();
  }

  inline interpreterState get_interpreterState() const;

 public:
  const EntryFrame *zero_entryframe() const {
    return zeroframe()->as_entry_frame();
  }
  const InterpreterFrame *zero_interpreterframe() const {
    return zeroframe()->as_interpreter_frame();
  }

 public:
  bool is_fake_stub_frame() const;

 public:
  frame sender_for_nonentry_frame(RegisterMap* map) const;

 public:
  void zero_print_on_error(int           index,
                           outputStream* st,
                           char*         buf,
                           int           buflen) const;

  static jint interpreter_frame_expression_stack_direction() { return -1; }

  inline address* sender_pc_addr() const;

  template <typename RegisterMapT>
  static void update_map_with_saved_link(RegisterMapT* map, intptr_t** link_addr);

#endif // CPU_ZERO_FRAME_ZERO_HPP