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015a42b4 | 1 | /* Generic code for supporting multiple C++ ABI's |
06c4d4dc | 2 | |
213516ef | 3 | Copyright (C) 2001-2023 Free Software Foundation, Inc. |
015a42b4 JB |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
015a42b4 JB |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
015a42b4 JB |
19 | |
20 | #include "defs.h" | |
83b6e1f1 | 21 | #include "language.h" |
4de283e4 | 22 | #include "value.h" |
d55e5aa6 | 23 | #include "cp-abi.h" |
4de283e4 | 24 | #include "command.h" |
fe1f4a5e DJ |
25 | #include "gdbcmd.h" |
26 | #include "ui-out.h" | |
fe1f4a5e | 27 | static struct cp_abi_ops *find_cp_abi (const char *short_name); |
015a42b4 | 28 | |
fe1f4a5e DJ |
29 | static struct cp_abi_ops current_cp_abi = { "", NULL }; |
30 | static struct cp_abi_ops auto_cp_abi = { "auto", NULL }; | |
015a42b4 | 31 | |
fe1f4a5e DJ |
32 | #define CP_ABI_MAX 8 |
33 | static struct cp_abi_ops *cp_abis[CP_ABI_MAX]; | |
34 | static int num_cp_abis = 0; | |
015a42b4 JB |
35 | |
36 | enum ctor_kinds | |
37 | is_constructor_name (const char *name) | |
38 | { | |
39 | if ((current_cp_abi.is_constructor_name) == NULL) | |
8a3fe4f8 | 40 | error (_("ABI doesn't define required function is_constructor_name")); |
015a42b4 JB |
41 | return (*current_cp_abi.is_constructor_name) (name); |
42 | } | |
43 | ||
44 | enum dtor_kinds | |
45 | is_destructor_name (const char *name) | |
46 | { | |
47 | if ((current_cp_abi.is_destructor_name) == NULL) | |
8a3fe4f8 | 48 | error (_("ABI doesn't define required function is_destructor_name")); |
015a42b4 JB |
49 | return (*current_cp_abi.is_destructor_name) (name); |
50 | } | |
51 | ||
52 | int | |
53 | is_vtable_name (const char *name) | |
54 | { | |
55 | if ((current_cp_abi.is_vtable_name) == NULL) | |
8a3fe4f8 | 56 | error (_("ABI doesn't define required function is_vtable_name")); |
015a42b4 JB |
57 | return (*current_cp_abi.is_vtable_name) (name); |
58 | } | |
59 | ||
60 | int | |
61 | is_operator_name (const char *name) | |
62 | { | |
63 | if ((current_cp_abi.is_operator_name) == NULL) | |
8a3fe4f8 | 64 | error (_("ABI doesn't define required function is_operator_name")); |
015a42b4 JB |
65 | return (*current_cp_abi.is_operator_name) (name); |
66 | } | |
67 | ||
1514d34e | 68 | int |
8af8e3bc | 69 | baseclass_offset (struct type *type, int index, const gdb_byte *valaddr, |
6b850546 | 70 | LONGEST embedded_offset, CORE_ADDR address, |
8af8e3bc | 71 | const struct value *val) |
1514d34e | 72 | { |
8af8e3bc PA |
73 | int res = 0; |
74 | ||
75 | gdb_assert (current_cp_abi.baseclass_offset != NULL); | |
76 | ||
a70b8144 | 77 | try |
8af8e3bc PA |
78 | { |
79 | res = (*current_cp_abi.baseclass_offset) (type, index, valaddr, | |
80 | embedded_offset, | |
81 | address, val); | |
82 | } | |
230d2906 | 83 | catch (const gdb_exception_error &ex) |
7556d4a4 PA |
84 | { |
85 | if (ex.error != NOT_AVAILABLE_ERROR) | |
eedc3f4f | 86 | throw; |
7556d4a4 PA |
87 | |
88 | throw_error (NOT_AVAILABLE_ERROR, | |
89 | _("Cannot determine virtual baseclass offset " | |
90 | "of incomplete object")); | |
91 | } | |
8af8e3bc | 92 | |
7556d4a4 | 93 | return res; |
1514d34e DJ |
94 | } |
95 | ||
e933e538 | 96 | struct value * |
aff410f1 MS |
97 | value_virtual_fn_field (struct value **arg1p, |
98 | struct fn_field *f, int j, | |
fe1f4a5e | 99 | struct type *type, int offset) |
015a42b4 JB |
100 | { |
101 | if ((current_cp_abi.virtual_fn_field) == NULL) | |
102 | return NULL; | |
aff410f1 MS |
103 | return (*current_cp_abi.virtual_fn_field) (arg1p, f, j, |
104 | type, offset); | |
015a42b4 | 105 | } |
1514d34e | 106 | |
015a42b4 | 107 | struct type * |
aff410f1 | 108 | value_rtti_type (struct value *v, int *full, |
6b850546 | 109 | LONGEST *top, int *using_enc) |
015a42b4 | 110 | { |
7093c834 | 111 | struct type *ret = NULL; |
c5504eaf | 112 | |
8ecb59f8 | 113 | if ((current_cp_abi.rtti_type) == NULL |
d0c97917 | 114 | || !HAVE_CPLUS_STRUCT (check_typedef (v->type ()))) |
015a42b4 | 115 | return NULL; |
a70b8144 | 116 | try |
7093c834 PP |
117 | { |
118 | ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc); | |
119 | } | |
230d2906 | 120 | catch (const gdb_exception_error &e) |
492d29ea PA |
121 | { |
122 | return NULL; | |
123 | } | |
492d29ea | 124 | |
7093c834 | 125 | return ret; |
015a42b4 JB |
126 | } |
127 | ||
0d5de010 | 128 | void |
aff410f1 MS |
129 | cplus_print_method_ptr (const gdb_byte *contents, |
130 | struct type *type, | |
0d5de010 DJ |
131 | struct ui_file *stream) |
132 | { | |
133 | if (current_cp_abi.print_method_ptr == NULL) | |
134 | error (_("GDB does not support pointers to methods on this target")); | |
135 | (*current_cp_abi.print_method_ptr) (contents, type, stream); | |
136 | } | |
137 | ||
138 | int | |
ad4820ab | 139 | cplus_method_ptr_size (struct type *to_type) |
0d5de010 DJ |
140 | { |
141 | if (current_cp_abi.method_ptr_size == NULL) | |
142 | error (_("GDB does not support pointers to methods on this target")); | |
ad4820ab | 143 | return (*current_cp_abi.method_ptr_size) (to_type); |
0d5de010 DJ |
144 | } |
145 | ||
146 | void | |
ad4820ab UW |
147 | cplus_make_method_ptr (struct type *type, gdb_byte *contents, |
148 | CORE_ADDR value, int is_virtual) | |
0d5de010 DJ |
149 | { |
150 | if (current_cp_abi.make_method_ptr == NULL) | |
151 | error (_("GDB does not support pointers to methods on this target")); | |
ad4820ab | 152 | (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual); |
0d5de010 DJ |
153 | } |
154 | ||
b18be20d | 155 | CORE_ADDR |
bd2b40ac | 156 | cplus_skip_trampoline (frame_info_ptr frame, |
aff410f1 | 157 | CORE_ADDR stop_pc) |
b18be20d DJ |
158 | { |
159 | if (current_cp_abi.skip_trampoline == NULL) | |
160 | return 0; | |
52f729a7 | 161 | return (*current_cp_abi.skip_trampoline) (frame, stop_pc); |
b18be20d DJ |
162 | } |
163 | ||
0d5de010 | 164 | struct value * |
aff410f1 MS |
165 | cplus_method_ptr_to_value (struct value **this_p, |
166 | struct value *method_ptr) | |
0d5de010 DJ |
167 | { |
168 | if (current_cp_abi.method_ptr_to_value == NULL) | |
169 | error (_("GDB does not support pointers to methods on this target")); | |
170 | return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr); | |
171 | } | |
172 | ||
c4aeac85 TT |
173 | /* See cp-abi.h. */ |
174 | ||
175 | void | |
176 | cplus_print_vtable (struct value *value) | |
177 | { | |
178 | if (current_cp_abi.print_vtable == NULL) | |
179 | error (_("GDB cannot print the vtable on this target")); | |
843e694d | 180 | (*current_cp_abi.print_vtable) (value); |
c4aeac85 TT |
181 | } |
182 | ||
6e72ca20 TT |
183 | /* See cp-abi.h. */ |
184 | ||
185 | struct value * | |
186 | cplus_typeid (struct value *value) | |
187 | { | |
188 | if (current_cp_abi.get_typeid == NULL) | |
189 | error (_("GDB cannot find the typeid on this target")); | |
190 | return (*current_cp_abi.get_typeid) (value); | |
191 | } | |
192 | ||
193 | /* See cp-abi.h. */ | |
194 | ||
195 | struct type * | |
196 | cplus_typeid_type (struct gdbarch *gdbarch) | |
197 | { | |
198 | if (current_cp_abi.get_typeid_type == NULL) | |
199 | error (_("GDB cannot find the type for 'typeid' on this target")); | |
200 | return (*current_cp_abi.get_typeid_type) (gdbarch); | |
201 | } | |
202 | ||
72f1fe8a TT |
203 | /* See cp-abi.h. */ |
204 | ||
205 | struct type * | |
206 | cplus_type_from_type_info (struct value *value) | |
207 | { | |
208 | if (current_cp_abi.get_type_from_type_info == NULL) | |
209 | error (_("GDB cannot find the type from a std::type_info on this target")); | |
210 | return (*current_cp_abi.get_type_from_type_info) (value); | |
211 | } | |
212 | ||
cc16e6c9 TT |
213 | /* See cp-abi.h. */ |
214 | ||
2f408ecb | 215 | std::string |
cc16e6c9 TT |
216 | cplus_typename_from_type_info (struct value *value) |
217 | { | |
218 | if (current_cp_abi.get_typename_from_type_info == NULL) | |
219 | error (_("GDB cannot find the type name " | |
220 | "from a std::type_info on this target")); | |
221 | return (*current_cp_abi.get_typename_from_type_info) (value); | |
222 | } | |
223 | ||
9d084466 TBA |
224 | /* See cp-abi.h. */ |
225 | ||
226 | struct language_pass_by_ref_info | |
41f1b697 DJ |
227 | cp_pass_by_reference (struct type *type) |
228 | { | |
229 | if ((current_cp_abi.pass_by_reference) == NULL) | |
48448202 | 230 | return {}; |
41f1b697 DJ |
231 | return (*current_cp_abi.pass_by_reference) (type); |
232 | } | |
233 | ||
fe1f4a5e DJ |
234 | /* Set the current C++ ABI to SHORT_NAME. */ |
235 | ||
236 | static int | |
237 | switch_to_cp_abi (const char *short_name) | |
238 | { | |
239 | struct cp_abi_ops *abi; | |
240 | ||
241 | abi = find_cp_abi (short_name); | |
242 | if (abi == NULL) | |
243 | return 0; | |
244 | ||
245 | current_cp_abi = *abi; | |
246 | return 1; | |
247 | } | |
248 | ||
249 | /* Add ABI to the list of supported C++ ABI's. */ | |
250 | ||
015a42b4 | 251 | int |
fe1f4a5e | 252 | register_cp_abi (struct cp_abi_ops *abi) |
015a42b4 | 253 | { |
fe1f4a5e | 254 | if (num_cp_abis == CP_ABI_MAX) |
f34652de | 255 | internal_error (_("Too many C++ ABIs, please increase " |
3e43a32a | 256 | "CP_ABI_MAX in cp-abi.c")); |
fe1f4a5e | 257 | |
015a42b4 JB |
258 | cp_abis[num_cp_abis++] = abi; |
259 | ||
260 | return 1; | |
fe1f4a5e DJ |
261 | } |
262 | ||
263 | /* Set the ABI to use in "auto" mode to SHORT_NAME. */ | |
015a42b4 | 264 | |
fe1f4a5e DJ |
265 | void |
266 | set_cp_abi_as_auto_default (const char *short_name) | |
267 | { | |
fe1f4a5e DJ |
268 | struct cp_abi_ops *abi = find_cp_abi (short_name); |
269 | ||
270 | if (abi == NULL) | |
f34652de | 271 | internal_error (_("Cannot find C++ ABI \"%s\" to set it as auto default."), |
fe1f4a5e DJ |
272 | short_name); |
273 | ||
84d53fa9 SM |
274 | xfree ((char *) auto_cp_abi.longname); |
275 | xfree ((char *) auto_cp_abi.doc); | |
fe1f4a5e DJ |
276 | |
277 | auto_cp_abi = *abi; | |
278 | ||
279 | auto_cp_abi.shortname = "auto"; | |
8579fd13 AB |
280 | auto_cp_abi.longname = xstrprintf ("currently \"%s\"", |
281 | abi->shortname).release (); | |
282 | auto_cp_abi.doc = xstrprintf ("Automatically selected; currently \"%s\"", | |
283 | abi->shortname).release (); | |
fe1f4a5e DJ |
284 | |
285 | /* Since we copy the current ABI into current_cp_abi instead of | |
286 | using a pointer, if auto is currently the default, we need to | |
287 | reset it. */ | |
288 | if (strcmp (current_cp_abi.shortname, "auto") == 0) | |
289 | switch_to_cp_abi ("auto"); | |
015a42b4 JB |
290 | } |
291 | ||
fe1f4a5e DJ |
292 | /* Return the ABI operations associated with SHORT_NAME. */ |
293 | ||
294 | static struct cp_abi_ops * | |
295 | find_cp_abi (const char *short_name) | |
015a42b4 JB |
296 | { |
297 | int i; | |
fe1f4a5e | 298 | |
015a42b4 | 299 | for (i = 0; i < num_cp_abis; i++) |
fe1f4a5e DJ |
300 | if (strcmp (cp_abis[i]->shortname, short_name) == 0) |
301 | return cp_abis[i]; | |
302 | ||
303 | return NULL; | |
015a42b4 JB |
304 | } |
305 | ||
fe1f4a5e DJ |
306 | /* Display the list of registered C++ ABIs. */ |
307 | ||
308 | static void | |
309 | list_cp_abis (int from_tty) | |
310 | { | |
79a45e25 | 311 | struct ui_out *uiout = current_uiout; |
fe1f4a5e | 312 | int i; |
fe1f4a5e | 313 | |
112e8700 | 314 | uiout->text ("The available C++ ABIs are:\n"); |
2e783024 | 315 | ui_out_emit_tuple tuple_emitter (uiout, "cp-abi-list"); |
fe1f4a5e DJ |
316 | for (i = 0; i < num_cp_abis; i++) |
317 | { | |
318 | char pad[14]; | |
319 | int padcount; | |
320 | ||
112e8700 SM |
321 | uiout->text (" "); |
322 | uiout->field_string ("cp-abi", cp_abis[i]->shortname); | |
fe1f4a5e DJ |
323 | |
324 | padcount = 16 - 2 - strlen (cp_abis[i]->shortname); | |
325 | pad[padcount] = 0; | |
326 | while (padcount > 0) | |
327 | pad[--padcount] = ' '; | |
112e8700 | 328 | uiout->text (pad); |
fe1f4a5e | 329 | |
112e8700 SM |
330 | uiout->field_string ("doc", cp_abis[i]->doc); |
331 | uiout->text ("\n"); | |
fe1f4a5e | 332 | } |
fe1f4a5e DJ |
333 | } |
334 | ||
335 | /* Set the current C++ ABI, or display the list of options if no | |
336 | argument is given. */ | |
337 | ||
338 | static void | |
4ada038f | 339 | set_cp_abi_cmd (const char *args, int from_tty) |
fe1f4a5e DJ |
340 | { |
341 | if (args == NULL) | |
342 | { | |
343 | list_cp_abis (from_tty); | |
344 | return; | |
345 | } | |
346 | ||
347 | if (!switch_to_cp_abi (args)) | |
8a3fe4f8 | 348 | error (_("Could not find \"%s\" in ABI list"), args); |
fe1f4a5e DJ |
349 | } |
350 | ||
db2b2972 TT |
351 | /* A completion function for "set cp-abi". */ |
352 | ||
eb3ff9a5 | 353 | static void |
db2b2972 | 354 | cp_abi_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 355 | completion_tracker &tracker, |
6f937416 | 356 | const char *text, const char *word) |
db2b2972 TT |
357 | { |
358 | static const char **cp_abi_names; | |
359 | ||
360 | if (cp_abi_names == NULL) | |
361 | { | |
362 | int i; | |
363 | ||
364 | cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1); | |
365 | for (i = 0; i < num_cp_abis; ++i) | |
366 | cp_abi_names[i] = cp_abis[i]->shortname; | |
6108433d | 367 | cp_abi_names[i] = NULL; |
db2b2972 TT |
368 | } |
369 | ||
eb3ff9a5 | 370 | complete_on_enum (tracker, cp_abi_names, text, word); |
db2b2972 TT |
371 | } |
372 | ||
fe1f4a5e DJ |
373 | /* Show the currently selected C++ ABI. */ |
374 | ||
375 | static void | |
4ada038f | 376 | show_cp_abi_cmd (const char *args, int from_tty) |
fe1f4a5e | 377 | { |
79a45e25 PA |
378 | struct ui_out *uiout = current_uiout; |
379 | ||
112e8700 | 380 | uiout->text ("The currently selected C++ ABI is \""); |
fe1f4a5e | 381 | |
112e8700 SM |
382 | uiout->field_string ("cp-abi", current_cp_abi.shortname); |
383 | uiout->text ("\" ("); | |
384 | uiout->field_string ("longname", current_cp_abi.longname); | |
385 | uiout->text (").\n"); | |
fe1f4a5e DJ |
386 | } |
387 | ||
6c265988 | 388 | void _initialize_cp_abi (); |
fe1f4a5e | 389 | void |
6c265988 | 390 | _initialize_cp_abi () |
fe1f4a5e | 391 | { |
db2b2972 TT |
392 | struct cmd_list_element *c; |
393 | ||
fe1f4a5e DJ |
394 | register_cp_abi (&auto_cp_abi); |
395 | switch_to_cp_abi ("auto"); | |
396 | ||
db2b2972 | 397 | c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\ |
ac74f770 MS |
398 | Set the ABI used for inspecting C++ objects.\n\ |
399 | \"set cp-abi\" with no arguments will list the available ABIs."), | |
db2b2972 TT |
400 | &setlist); |
401 | set_cmd_completer (c, cp_abi_completer); | |
fe1f4a5e DJ |
402 | |
403 | add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd, | |
aff410f1 MS |
404 | _("Show the ABI used for inspecting C++ objects."), |
405 | &showlist); | |
fe1f4a5e | 406 | } |