| 1 | /* Self tests for offset types for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2017-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbsupport/selftest.h" |
| 22 | #include "gdbsupport/offset-type.h" |
| 23 | #include "gdbsupport/underlying.h" |
| 24 | #include "gdbsupport/valid-expr.h" |
| 25 | |
| 26 | namespace selftests { |
| 27 | namespace offset_type { |
| 28 | |
| 29 | DEFINE_OFFSET_TYPE (off_A, unsigned int); |
| 30 | DEFINE_OFFSET_TYPE (off_B, unsigned int); |
| 31 | |
| 32 | /* First, compile-time tests that: |
| 33 | |
| 34 | - make sure that incorrect operations with mismatching types are |
| 35 | caught at compile time. |
| 36 | |
| 37 | - make sure that the same operations but involving the right types |
| 38 | do compile and that they return the correct type. |
| 39 | */ |
| 40 | |
| 41 | #define CHECK_VALID(VALID, EXPR_TYPE, EXPR) \ |
| 42 | CHECK_VALID_EXPR_2 (off_A, off_B, VALID, EXPR_TYPE, EXPR) |
| 43 | |
| 44 | off_A lval_a {}; |
| 45 | off_B lval_b {}; |
| 46 | |
| 47 | using undrl = std::underlying_type<off_A>::type; |
| 48 | |
| 49 | /* Offset +/- underlying. */ |
| 50 | |
| 51 | CHECK_VALID (true, off_A, off_A {} + undrl {}); |
| 52 | CHECK_VALID (true, off_A, off_A {} - undrl {}); |
| 53 | CHECK_VALID (true, off_A, undrl {} + off_A {}); |
| 54 | CHECK_VALID (true, off_A, undrl {} - off_A {}); |
| 55 | |
| 56 | /* Add offset types. Both same and different. */ |
| 57 | |
| 58 | CHECK_VALID (false, void, off_A {} + off_A {}); |
| 59 | CHECK_VALID (false, void, off_A {} + off_B {}); |
| 60 | |
| 61 | /* Subtract offset types. Both same and different. */ |
| 62 | |
| 63 | CHECK_VALID (false, void, off_B {} - off_A {}); |
| 64 | CHECK_VALID (true, undrl, off_A {} - off_A {}); |
| 65 | |
| 66 | /* Add/assign offset types. Both same and different. */ |
| 67 | |
| 68 | CHECK_VALID (false, void, lval_a += off_A {}); |
| 69 | CHECK_VALID (false, void, lval_a += off_B {}); |
| 70 | CHECK_VALID (false, void, lval_a -= off_A {}); |
| 71 | CHECK_VALID (false, void, lval_a -= off_B {}); |
| 72 | |
| 73 | /* operator OP+= (offset, underlying), lvalue ref on the lhs. */ |
| 74 | |
| 75 | CHECK_VALID (true, off_A&, lval_a += undrl {}); |
| 76 | CHECK_VALID (true, off_A&, lval_a -= undrl {}); |
| 77 | |
| 78 | /* operator OP+= (offset, underlying), rvalue ref on the lhs. */ |
| 79 | |
| 80 | CHECK_VALID (false, void, off_A {} += undrl {}); |
| 81 | CHECK_VALID (false, void, off_A {} -= undrl {}); |
| 82 | |
| 83 | /* Rel ops, with same type. */ |
| 84 | |
| 85 | CHECK_VALID (true, bool, off_A {} < off_A {}); |
| 86 | CHECK_VALID (true, bool, off_A {} > off_A {}); |
| 87 | CHECK_VALID (true, bool, off_A {} <= off_A {}); |
| 88 | CHECK_VALID (true, bool, off_A {} >= off_A {}); |
| 89 | |
| 90 | /* Rel ops, with unrelated offset types. */ |
| 91 | |
| 92 | CHECK_VALID (false, void, off_A {} < off_B {}); |
| 93 | CHECK_VALID (false, void, off_A {} > off_B {}); |
| 94 | CHECK_VALID (false, void, off_A {} <= off_B {}); |
| 95 | CHECK_VALID (false, void, off_A {} >= off_B {}); |
| 96 | |
| 97 | /* Rel ops, with unrelated types. */ |
| 98 | |
| 99 | CHECK_VALID (false, void, off_A {} < undrl {}); |
| 100 | CHECK_VALID (false, void, off_A {} > undrl {}); |
| 101 | CHECK_VALID (false, void, off_A {} <= undrl {}); |
| 102 | CHECK_VALID (false, void, off_A {} >= undrl {}); |
| 103 | |
| 104 | static void |
| 105 | run_tests () |
| 106 | { |
| 107 | /* Test op+ and op-. */ |
| 108 | { |
| 109 | constexpr off_A a {}; |
| 110 | static_assert (to_underlying (a) == 0, ""); |
| 111 | |
| 112 | { |
| 113 | constexpr off_A res1 = a + 2; |
| 114 | static_assert (to_underlying (res1) == 2, ""); |
| 115 | |
| 116 | constexpr off_A res2 = res1 - 1; |
| 117 | static_assert (to_underlying (res2) == 1, ""); |
| 118 | } |
| 119 | |
| 120 | { |
| 121 | constexpr off_A res1 = 2 + a; |
| 122 | static_assert (to_underlying (res1) == 2, ""); |
| 123 | |
| 124 | constexpr off_A res2 = 3 - res1; |
| 125 | static_assert (to_underlying (res2) == 1, ""); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* Test op+= and op-=. */ |
| 130 | { |
| 131 | off_A o {}; |
| 132 | |
| 133 | o += 10; |
| 134 | SELF_CHECK (to_underlying (o) == 10); |
| 135 | o -= 5; |
| 136 | SELF_CHECK (to_underlying (o) == 5); |
| 137 | } |
| 138 | |
| 139 | /* Test op-. */ |
| 140 | { |
| 141 | constexpr off_A o1 = (off_A) 10; |
| 142 | constexpr off_A o2 = (off_A) 20; |
| 143 | |
| 144 | constexpr unsigned int delta = o2 - o1; |
| 145 | |
| 146 | static_assert (delta == 10, ""); |
| 147 | } |
| 148 | |
| 149 | /* Test <, <=, >, >=. */ |
| 150 | { |
| 151 | constexpr off_A o1 = (off_A) 10; |
| 152 | constexpr off_A o2 = (off_A) 20; |
| 153 | |
| 154 | static_assert (o1 < o2, ""); |
| 155 | static_assert (!(o2 < o1), ""); |
| 156 | |
| 157 | static_assert (o2 > o1, ""); |
| 158 | static_assert (!(o1 > o2), ""); |
| 159 | |
| 160 | static_assert (o1 <= o2, ""); |
| 161 | static_assert (!(o2 <= o1), ""); |
| 162 | |
| 163 | static_assert (o2 >= o1, ""); |
| 164 | static_assert (!(o1 >= o2), ""); |
| 165 | |
| 166 | static_assert (o1 <= o1, ""); |
| 167 | static_assert (o1 >= o1, ""); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | } /* namespace offset_type */ |
| 172 | } /* namespace selftests */ |
| 173 | |
| 174 | void |
| 175 | _initialize_offset_type_selftests () |
| 176 | { |
| 177 | selftests::register_test ("offset_type", selftests::offset_type::run_tests); |
| 178 | } |