interpreterFrame_zero.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2010 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
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24 */
25
26#ifdef CC_INTERP
27// |  ...               |
28// +--------------------+  ------------------
29// | stack slot n-1     |       low addresses
30// |  ...               |
31// | stack slot 0       |
32// | monitor 0 (maybe)  |
33// |  ...               |
34// | interpreter state  |
35// |  ...               |
36// | frame_type         |
37// | next_frame         |      high addresses
38// +--------------------+  ------------------
39// |  ...               |
40
41class InterpreterFrame : public ZeroFrame {
42  friend class AbstractInterpreter;
43
44 private:
45  InterpreterFrame() : ZeroFrame() {
46    ShouldNotCallThis();
47  }
48
49 protected:
50  enum Layout {
51    istate_off = jf_header_words +
52      (align_size_up_(sizeof(BytecodeInterpreter),
53                      wordSize) >> LogBytesPerWord) - 1,
54    header_words
55  };
56
57 public:
58  static InterpreterFrame *build(const methodOop method, TRAPS);
59  static InterpreterFrame *build(int size, TRAPS);
60
61 public:
62  interpreterState interpreter_state() const {
63    return (interpreterState) addr_of_word(istate_off);
64  }
65
66 public:
67  void identify_word(int   frame_index,
68                     int   offset,
69                     char* fieldbuf,
70                     char* valuebuf,
71                     int   buflen) const;
72};
73#endif // CC_INTERP
74