| 1 | /* Symbolic offsets and ranges. |
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| 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
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| 3 | Contributed by David Malcolm <dmalcolm@redhat.com>. |
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| 4 | |
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| 5 | This file is part of GCC. |
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| 6 | |
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| 7 | GCC is free software; you can redistribute it and/or modify it |
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| 8 | under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 3, or (at your option) |
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| 10 | any later version. |
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| 11 | |
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| 12 | GCC is distributed in the hope that it will be useful, but |
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| 13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GCC; see the file COPYING3. If not see |
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| 19 | <http://www.gnu.org/licenses/>. */ |
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| 20 | |
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| 21 | #ifndef GCC_ANALYZER_RANGES_H |
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| 22 | #define GCC_ANALYZER_RANGES_H |
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| 23 | |
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| 24 | namespace ana { |
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| 25 | |
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| 26 | /* Wrapper around an svalue for a value measured in bytes. */ |
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| 27 | |
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| 28 | class symbolic_byte_offset |
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| 29 | { |
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| 30 | public: |
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| 31 | explicit symbolic_byte_offset (int i, region_model_manager &mgr); |
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| 32 | symbolic_byte_offset (const svalue *num_bytes_sval); |
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| 33 | explicit symbolic_byte_offset (region_offset offset, |
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| 34 | region_model_manager &mgr); |
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| 35 | |
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| 36 | const svalue *get_svalue () const { return m_num_bytes_sval; } |
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| 37 | tree maybe_get_constant () const; |
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| 38 | |
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| 39 | void dump_to_pp (pretty_printer *pp, bool) const; |
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| 40 | void dump (bool) const; |
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| 41 | |
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| 42 | json::value *to_json () const; |
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| 43 | |
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| 44 | bool operator== (const symbolic_byte_offset &other) const |
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| 45 | { |
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| 46 | return m_num_bytes_sval == other.m_num_bytes_sval; |
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| 47 | } |
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| 48 | |
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| 49 | private: |
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| 50 | const svalue *m_num_bytes_sval; |
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| 51 | }; |
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| 52 | |
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| 53 | /* A range of byte offsets, where both the start and size of the |
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| 54 | range can be symbolic. */ |
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| 55 | |
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| 56 | class symbolic_byte_range |
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| 57 | { |
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| 58 | public: |
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| 59 | symbolic_byte_range (symbolic_byte_offset start, |
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| 60 | symbolic_byte_offset size) |
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| 61 | : m_start (start), |
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| 62 | m_size (size) |
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| 63 | { |
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| 64 | } |
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| 65 | |
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| 66 | symbolic_byte_range (region_offset start, |
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| 67 | const svalue *num_bytes, |
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| 68 | region_model_manager &mgr); |
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| 69 | |
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| 70 | void dump_to_pp (pretty_printer *pp, |
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| 71 | bool simple, |
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| 72 | region_model_manager &mgr) const; |
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| 73 | void dump (bool, region_model_manager &mgr) const; |
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| 74 | |
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| 75 | json::value *to_json () const; |
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| 76 | |
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| 77 | bool empty_p () const; |
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| 78 | |
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| 79 | symbolic_byte_offset get_start_byte_offset () const |
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| 80 | { |
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| 81 | return m_start; |
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| 82 | } |
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| 83 | symbolic_byte_offset get_last_byte_offset (region_model_manager &mgr) const; |
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| 84 | symbolic_byte_offset get_size_in_bytes () const |
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| 85 | { |
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| 86 | return m_size; |
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| 87 | } |
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| 88 | symbolic_byte_offset get_next_byte_offset (region_model_manager &mgr) const; |
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| 89 | |
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| 90 | tristate intersection (const symbolic_byte_range &other, |
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| 91 | const region_model &model) const; |
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| 92 | |
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| 93 | private: |
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| 94 | symbolic_byte_offset m_start; |
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| 95 | symbolic_byte_offset m_size; |
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| 96 | }; |
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| 97 | |
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| 98 | } // namespace ana |
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| 99 | |
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| 100 | #endif /* GCC_ANALYZER_RANGES_H */ |
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| 101 | |
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