1 | /* Declaration of class record_layout. |
2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
3 | Contributed by David Malcolm <dmalcolm@redhat.com>. |
4 | |
5 | This file is part of GCC. |
6 | |
7 | GCC is free software; you can redistribute it and/or modify it |
8 | under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 3, or (at your option) |
10 | any later version. |
11 | |
12 | GCC is distributed in the hope that it will be useful, but |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | General Public License for more details. |
16 | |
17 | You should have received a copy of the GNU General Public License |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ |
20 | |
21 | #ifndef GCC_ANALYZER_RECORD_LAYOUT_H |
22 | #define GCC_ANALYZER_RECORD_LAYOUT_H |
23 | |
24 | #include "analyzer/store.h" |
25 | |
26 | namespace ana { |
27 | |
28 | /* Information of the layout of a RECORD_TYPE, capturing it as a vector |
29 | of items, where each item is either a field or padding. */ |
30 | |
31 | class record_layout |
32 | { |
33 | public: |
34 | /* An item within a record; either a field, or padding after a field. */ |
35 | struct item |
36 | { |
37 | public: |
38 | item (const bit_range &br, |
39 | tree field, |
40 | bool is_padding) |
41 | : m_bit_range (br), |
42 | m_field (field), |
43 | m_is_padding (is_padding) |
44 | { |
45 | } |
46 | |
47 | bit_offset_t get_start_bit_offset () const |
48 | { |
49 | return m_bit_range.get_start_bit_offset (); |
50 | } |
51 | bit_offset_t get_next_bit_offset () const |
52 | { |
53 | return m_bit_range.get_next_bit_offset (); |
54 | } |
55 | |
56 | bool contains_p (bit_offset_t offset) const |
57 | { |
58 | return m_bit_range.contains_p (offset); |
59 | } |
60 | |
61 | void dump_to_pp (pretty_printer *pp) const |
62 | { |
63 | if (m_is_padding) |
64 | pp_printf (pp, "padding after %qD" , m_field); |
65 | else |
66 | pp_printf (pp, "%qD" , m_field); |
67 | pp_string (pp, ", " ); |
68 | m_bit_range.dump_to_pp (pp); |
69 | } |
70 | |
71 | bit_range m_bit_range; |
72 | tree m_field; |
73 | bool m_is_padding; |
74 | }; |
75 | |
76 | record_layout (tree record_type); |
77 | |
78 | void dump_to_pp (pretty_printer *pp) const; |
79 | DEBUG_FUNCTION void dump () const; |
80 | |
81 | const record_layout::item *get_item_at (bit_offset_t offset) const; |
82 | |
83 | private: |
84 | void maybe_pad_to (bit_offset_t next_offset); |
85 | |
86 | auto_vec<item> m_items; |
87 | }; |
88 | |
89 | } // namespace ana |
90 | |
91 | #endif /* GCC_ANALYZER_RECORD_LAYOUT_H */ |
92 | |