view src/cpu/zero/vm/sharkFrame_zero.hpp @ 3602:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents f95d63e2154a
children c566b81b3323
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/*
 * 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);
  }

  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