sharkFrame_zero.hpp revision 3602:da91efe96a93 
1/*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26#ifndef CPU_ZERO_VM_SHARKFRAME_ZERO_HPP
27#define CPU_ZERO_VM_SHARKFRAME_ZERO_HPP
28
29#include "oops/method.hpp"
30#include "stack_zero.hpp"
31
32// |  ...               |
33// +--------------------+  ------------------
34// | stack slot n-1     |       low addresses
35// |  ...               |
36// | stack slot 0       |
37// | monitor m-1        |
38// |  ...               |
39// | monitor 0          |
40// | oop_tmp            |
41// | method             |
42// | unextended_sp      |
43// | pc                 |
44// | frame_type         |
45// | next_frame         |      high addresses
46// +--------------------+  ------------------
47// |  ...               |
48
49class SharkFrame : public ZeroFrame {
50  friend class SharkStack;
51
52 private:
53  SharkFrame() : ZeroFrame() {
54    ShouldNotCallThis();
55  }
56
57 protected:
58  enum Layout {
59    pc_off = jf_header_words,
60    unextended_sp_off,
61    method_off,
62    oop_tmp_off,
63    header_words
64  };
65
66 public:
67  address pc() const {
68    return (address) value_of_word(pc_off);
69  }
70
71  intptr_t* unextended_sp() const {
72    return (intptr_t *) value_of_word(unextended_sp_off);
73  }
74
75  Method* method() const {
76    return (Method*) value_of_word(method_off);
77  }
78
79 public:
80  void identify_word(int   frame_index,
81                     int   offset,
82                     char* fieldbuf,
83                     char* valuebuf,
84                     int   buflen) const;
85};
86
87#endif // CPU_ZERO_VM_SHARKFRAME_ZERO_HPP
88