interpreterFrame_zero.hpp revision 1010:354d3184f6b2 
1/*
2 * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
3 * Copyright 2008 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
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(ZeroStack*      stack,
59                                 const methodOop method,
60                                 JavaThread*     thread);
61  static InterpreterFrame *build(ZeroStack* stack, int size);
62
63 public:
64  interpreterState interpreter_state() const {
65    return (interpreterState) addr_of_word(istate_off);
66  }
67
68 public:
69  void identify_word(int   frame_index,
70                     int   offset,
71                     char* fieldbuf,
72                     char* valuebuf,
73                     int   buflen) const;
74};
75#endif // CC_INTERP
76