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b77b02a5 YQ |
1 | /* Self tests for gdbarch for GDB, the GNU debugger. |
2 | ||
3 | Copyright (C) 2017 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 | #if GDB_SELF_TEST | |
22 | #include "selftest.h" | |
23 | #include "selftest-arch.h" | |
24 | #include "inferior.h" | |
55b11ddf PA |
25 | #include "gdbthread.h" |
26 | #include "target.h" | |
b77b02a5 YQ |
27 | |
28 | namespace selftests { | |
29 | ||
55b11ddf PA |
30 | /* A mock process_stratum target_ops that doesn't read/write registers |
31 | anywhere. */ | |
b77b02a5 | 32 | |
55b11ddf PA |
33 | static int |
34 | test_target_has_registers (target_ops *self) | |
b77b02a5 | 35 | { |
55b11ddf PA |
36 | return 1; |
37 | } | |
b77b02a5 | 38 | |
55b11ddf PA |
39 | static int |
40 | test_target_has_stack (target_ops *self) | |
41 | { | |
42 | return 1; | |
43 | } | |
44 | ||
45 | static int | |
46 | test_target_has_memory (target_ops *self) | |
47 | { | |
48 | return 1; | |
49 | } | |
50 | ||
51 | static void | |
52 | test_target_prepare_to_store (target_ops *self, regcache *regs) | |
53 | { | |
54 | } | |
b77b02a5 | 55 | |
55b11ddf PA |
56 | static void |
57 | test_target_store_registers (target_ops *self, regcache *regs, int regno) | |
58 | { | |
59 | } | |
60 | ||
61 | class test_target_ops : public target_ops | |
62 | { | |
63 | public: | |
64 | test_target_ops () | |
65 | : target_ops {} | |
b77b02a5 | 66 | { |
55b11ddf PA |
67 | to_magic = OPS_MAGIC; |
68 | to_stratum = process_stratum; | |
69 | to_has_memory = test_target_has_memory; | |
70 | to_has_stack = test_target_has_stack; | |
71 | to_has_registers = test_target_has_registers; | |
72 | to_prepare_to_store = test_target_prepare_to_store; | |
73 | to_store_registers = test_target_store_registers; | |
74 | ||
75 | complete_target_initialization (this); | |
b77b02a5 YQ |
76 | } |
77 | }; | |
78 | ||
79 | /* Test gdbarch methods register_to_value and value_to_register. */ | |
80 | ||
81 | static void | |
82 | register_to_value_test (struct gdbarch *gdbarch) | |
83 | { | |
84 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
85 | struct type *types[] = | |
86 | { | |
87 | builtin->builtin_void, | |
88 | builtin->builtin_char, | |
89 | builtin->builtin_short, | |
90 | builtin->builtin_int, | |
91 | builtin->builtin_long, | |
92 | builtin->builtin_signed_char, | |
93 | builtin->builtin_unsigned_short, | |
94 | builtin->builtin_unsigned_int, | |
95 | builtin->builtin_unsigned_long, | |
96 | builtin->builtin_float, | |
97 | builtin->builtin_double, | |
98 | builtin->builtin_long_double, | |
99 | builtin->builtin_complex, | |
100 | builtin->builtin_double_complex, | |
101 | builtin->builtin_string, | |
102 | builtin->builtin_bool, | |
103 | builtin->builtin_long_long, | |
104 | builtin->builtin_unsigned_long_long, | |
105 | builtin->builtin_int8, | |
106 | builtin->builtin_uint8, | |
107 | builtin->builtin_int16, | |
108 | builtin->builtin_uint16, | |
109 | builtin->builtin_int32, | |
110 | builtin->builtin_uint32, | |
111 | builtin->builtin_int64, | |
112 | builtin->builtin_uint64, | |
113 | builtin->builtin_int128, | |
114 | builtin->builtin_uint128, | |
115 | builtin->builtin_char16, | |
116 | builtin->builtin_char32, | |
117 | }; | |
118 | ||
55b11ddf PA |
119 | /* Error out if debugging something, because we're going to push the |
120 | test target, which would pop any existing target. */ | |
121 | if (current_target.to_stratum >= process_stratum) | |
122 | error (_("target already pushed")); | |
123 | ||
124 | /* Create a mock environment. An inferior with a thread, with a | |
125 | process_stratum target pushed. */ | |
126 | ||
127 | test_target_ops mock_target; | |
128 | ptid_t mock_ptid (1, 1); | |
129 | inferior mock_inferior (mock_ptid.pid ()); | |
130 | address_space mock_aspace {}; | |
131 | mock_inferior.gdbarch = gdbarch; | |
132 | mock_inferior.aspace = &mock_aspace; | |
133 | thread_info mock_thread (&mock_inferior, mock_ptid); | |
134 | ||
135 | scoped_restore restore_thread_list | |
136 | = make_scoped_restore (&thread_list, &mock_thread); | |
137 | ||
138 | /* Add the mock inferior to the inferior list so that look ups by | |
139 | target+ptid can find it. */ | |
140 | scoped_restore restore_inferior_list | |
141 | = make_scoped_restore (&inferior_list); | |
142 | inferior_list = &mock_inferior; | |
143 | ||
144 | /* Switch to the mock inferior. */ | |
145 | scoped_restore_current_inferior restore_current_inferior; | |
146 | set_current_inferior (&mock_inferior); | |
147 | ||
148 | /* Push the process_stratum target so we can mock accessing | |
149 | registers. */ | |
150 | push_target (&mock_target); | |
151 | ||
152 | /* Pop it again on exit (return/exception). */ | |
153 | struct on_exit | |
154 | { | |
155 | ~on_exit () | |
156 | { | |
157 | pop_all_targets_at_and_above (process_stratum); | |
158 | } | |
159 | } pop_targets; | |
b77b02a5 | 160 | |
55b11ddf PA |
161 | /* Switch to the mock thread. */ |
162 | scoped_restore restore_inferior_ptid | |
163 | = make_scoped_restore (&inferior_ptid, mock_ptid); | |
164 | ||
165 | struct frame_info *frame = get_current_frame (); | |
b77b02a5 YQ |
166 | const int num_regs = (gdbarch_num_regs (gdbarch) |
167 | + gdbarch_num_pseudo_regs (gdbarch)); | |
168 | ||
b77b02a5 YQ |
169 | /* Test gdbarch methods register_to_value and value_to_register with |
170 | different combinations of register numbers and types. */ | |
171 | for (const auto &type : types) | |
172 | { | |
173 | for (auto regnum = 0; regnum < num_regs; regnum++) | |
174 | { | |
175 | if (gdbarch_convert_register_p (gdbarch, regnum, type)) | |
176 | { | |
177 | std::vector<gdb_byte> expected (TYPE_LENGTH (type), 0); | |
178 | ||
179 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
180 | { | |
181 | DOUBLEST d = 1.25; | |
182 | ||
183 | /* Generate valid float format. */ | |
184 | floatformat_from_doublest (floatformat_from_type (type), | |
185 | &d, expected.data ()); | |
186 | } | |
187 | else | |
188 | { | |
189 | for (auto j = 0; j < expected.size (); j++) | |
190 | expected[j] = (regnum + j) % 16; | |
191 | } | |
192 | ||
193 | gdbarch_value_to_register (gdbarch, frame, regnum, type, | |
194 | expected.data ()); | |
195 | ||
196 | /* Allocate two bytes more for overflow check. */ | |
197 | std::vector<gdb_byte> buf (TYPE_LENGTH (type) + 2, 0); | |
198 | int optim, unavail, ok; | |
199 | ||
200 | /* Set the fingerprint in the last two bytes. */ | |
201 | buf [TYPE_LENGTH (type)]= 'w'; | |
202 | buf [TYPE_LENGTH (type) + 1]= 'l'; | |
203 | ok = gdbarch_register_to_value (gdbarch, frame, regnum, type, | |
204 | buf.data (), &optim, &unavail); | |
205 | ||
206 | SELF_CHECK (ok); | |
207 | SELF_CHECK (!optim); | |
208 | SELF_CHECK (!unavail); | |
209 | ||
210 | SELF_CHECK (buf[TYPE_LENGTH (type)] == 'w'); | |
211 | SELF_CHECK (buf[TYPE_LENGTH (type) + 1] == 'l'); | |
212 | ||
213 | for (auto k = 0; k < TYPE_LENGTH(type); k++) | |
214 | SELF_CHECK (buf[k] == expected[k]); | |
215 | } | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | } // namespace selftests | |
221 | #endif /* GDB_SELF_TEST */ | |
222 | ||
223 | void | |
224 | _initialize_gdbarch_selftests (void) | |
225 | { | |
226 | #if GDB_SELF_TEST | |
1526853e SM |
227 | selftests::register_test_foreach_arch ("register_to_value", |
228 | selftests::register_to_value_test); | |
b77b02a5 YQ |
229 | #endif |
230 | } |