entryFrame_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
22 * questions.
23 *
24 */
25
26// |  ...               |
27// +--------------------+  ------------------
28// | parameter n-1      |       low addresses
29// |  ...               |
30// | parameter 0        |
31// | call_wrapper       |
32// | frame_type         |
33// | next_frame         |      high addresses
34// +--------------------+  ------------------
35// |  ...               |
36
37class EntryFrame : public ZeroFrame {
38 private:
39  EntryFrame() : ZeroFrame() {
40    ShouldNotCallThis();
41  }
42
43 protected:
44  enum Layout {
45    call_wrapper_off = jf_header_words,
46    header_words
47  };
48
49 public:
50  static EntryFrame *build(const intptr_t*  parameters,
51                           int              parameter_words,
52                           JavaCallWrapper* call_wrapper,
53                           TRAPS);
54 public:
55  JavaCallWrapper *call_wrapper() const {
56    return (JavaCallWrapper *) value_of_word(call_wrapper_off);
57  }
58
59 public:
60  void identify_word(int   frame_index,
61                     int   offset,
62                     char* fieldbuf,
63                     char* valuebuf,
64                     int   buflen) const;
65};
66