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015a42b4 | 1 | /* Generic code for supporting multiple C++ ABI's |
06c4d4dc | 2 | |
4a94e368 | 3 | Copyright (C) 2001-2022 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" | |
4de283e4 | 21 | #include "value.h" |
d55e5aa6 | 22 | #include "cp-abi.h" |
4de283e4 | 23 | #include "command.h" |
fe1f4a5e DJ |
24 | #include "gdbcmd.h" |
25 | #include "ui-out.h" | |
fe1f4a5e | 26 | static struct cp_abi_ops *find_cp_abi (const char *short_name); |
015a42b4 | 27 | |
fe1f4a5e DJ |
28 | static struct cp_abi_ops current_cp_abi = { "", NULL }; |
29 | static struct cp_abi_ops auto_cp_abi = { "auto", NULL }; | |
015a42b4 | 30 | |
fe1f4a5e DJ |
31 | #define CP_ABI_MAX 8 |
32 | static struct cp_abi_ops *cp_abis[CP_ABI_MAX]; | |
33 | static int num_cp_abis = 0; | |
015a42b4 JB |
34 | |
35 | enum ctor_kinds | |
36 | is_constructor_name (const char *name) | |
37 | { | |
38 | if ((current_cp_abi.is_constructor_name) == NULL) | |
8a3fe4f8 | 39 | error (_("ABI doesn't define required function is_constructor_name")); |
015a42b4 JB |
40 | return (*current_cp_abi.is_constructor_name) (name); |
41 | } | |
42 | ||
43 | enum dtor_kinds | |
44 | is_destructor_name (const char *name) | |
45 | { | |
46 | if ((current_cp_abi.is_destructor_name) == NULL) | |
8a3fe4f8 | 47 | error (_("ABI doesn't define required function is_destructor_name")); |
015a42b4 JB |
48 | return (*current_cp_abi.is_destructor_name) (name); |
49 | } | |
50 | ||
51 | int | |
52 | is_vtable_name (const char *name) | |
53 | { | |
54 | if ((current_cp_abi.is_vtable_name) == NULL) | |
8a3fe4f8 | 55 | error (_("ABI doesn't define required function is_vtable_name")); |
015a42b4 JB |
56 | return (*current_cp_abi.is_vtable_name) (name); |
57 | } | |
58 | ||
59 | int | |
60 | is_operator_name (const char *name) | |
61 | { | |
62 | if ((current_cp_abi.is_operator_name) == NULL) | |
8a3fe4f8 | 63 | error (_("ABI doesn't define required function is_operator_name")); |
015a42b4 JB |
64 | return (*current_cp_abi.is_operator_name) (name); |
65 | } | |
66 | ||
1514d34e | 67 | int |
8af8e3bc | 68 | baseclass_offset (struct type *type, int index, const gdb_byte *valaddr, |
6b850546 | 69 | LONGEST embedded_offset, CORE_ADDR address, |
8af8e3bc | 70 | const struct value *val) |
1514d34e | 71 | { |
8af8e3bc PA |
72 | int res = 0; |
73 | ||
74 | gdb_assert (current_cp_abi.baseclass_offset != NULL); | |
75 | ||
a70b8144 | 76 | try |
8af8e3bc PA |
77 | { |
78 | res = (*current_cp_abi.baseclass_offset) (type, index, valaddr, | |
79 | embedded_offset, | |
80 | address, val); | |
81 | } | |
230d2906 | 82 | catch (const gdb_exception_error &ex) |
7556d4a4 PA |
83 | { |
84 | if (ex.error != NOT_AVAILABLE_ERROR) | |
eedc3f4f | 85 | throw; |
7556d4a4 PA |
86 | |
87 | throw_error (NOT_AVAILABLE_ERROR, | |
88 | _("Cannot determine virtual baseclass offset " | |
89 | "of incomplete object")); | |
90 | } | |
8af8e3bc | 91 | |
7556d4a4 | 92 | return res; |
1514d34e DJ |
93 | } |
94 | ||
e933e538 | 95 | struct value * |
aff410f1 MS |
96 | value_virtual_fn_field (struct value **arg1p, |
97 | struct fn_field *f, int j, | |
fe1f4a5e | 98 | struct type *type, int offset) |
015a42b4 JB |
99 | { |
100 | if ((current_cp_abi.virtual_fn_field) == NULL) | |
101 | return NULL; | |
aff410f1 MS |
102 | return (*current_cp_abi.virtual_fn_field) (arg1p, f, j, |
103 | type, offset); | |
015a42b4 | 104 | } |
1514d34e | 105 | |
015a42b4 | 106 | struct type * |
aff410f1 | 107 | value_rtti_type (struct value *v, int *full, |
6b850546 | 108 | LONGEST *top, int *using_enc) |
015a42b4 | 109 | { |
7093c834 | 110 | struct type *ret = NULL; |
c5504eaf | 111 | |
8ecb59f8 TT |
112 | if ((current_cp_abi.rtti_type) == NULL |
113 | || !HAVE_CPLUS_STRUCT (check_typedef (value_type (v)))) | |
015a42b4 | 114 | return NULL; |
a70b8144 | 115 | try |
7093c834 PP |
116 | { |
117 | ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc); | |
118 | } | |
230d2906 | 119 | catch (const gdb_exception_error &e) |
492d29ea PA |
120 | { |
121 | return NULL; | |
122 | } | |
492d29ea | 123 | |
7093c834 | 124 | return ret; |
015a42b4 JB |
125 | } |
126 | ||
0d5de010 | 127 | void |
aff410f1 MS |
128 | cplus_print_method_ptr (const gdb_byte *contents, |
129 | struct type *type, | |
0d5de010 DJ |
130 | struct ui_file *stream) |
131 | { | |
132 | if (current_cp_abi.print_method_ptr == NULL) | |
133 | error (_("GDB does not support pointers to methods on this target")); | |
134 | (*current_cp_abi.print_method_ptr) (contents, type, stream); | |
135 | } | |
136 | ||
137 | int | |
ad4820ab | 138 | cplus_method_ptr_size (struct type *to_type) |
0d5de010 DJ |
139 | { |
140 | if (current_cp_abi.method_ptr_size == NULL) | |
141 | error (_("GDB does not support pointers to methods on this target")); | |
ad4820ab | 142 | return (*current_cp_abi.method_ptr_size) (to_type); |
0d5de010 DJ |
143 | } |
144 | ||
145 | void | |
ad4820ab UW |
146 | cplus_make_method_ptr (struct type *type, gdb_byte *contents, |
147 | CORE_ADDR value, int is_virtual) | |
0d5de010 DJ |
148 | { |
149 | if (current_cp_abi.make_method_ptr == NULL) | |
150 | error (_("GDB does not support pointers to methods on this target")); | |
ad4820ab | 151 | (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual); |
0d5de010 DJ |
152 | } |
153 | ||
b18be20d | 154 | CORE_ADDR |
bd2b40ac | 155 | cplus_skip_trampoline (frame_info_ptr frame, |
aff410f1 | 156 | CORE_ADDR stop_pc) |
b18be20d DJ |
157 | { |
158 | if (current_cp_abi.skip_trampoline == NULL) | |
159 | return 0; | |
52f729a7 | 160 | return (*current_cp_abi.skip_trampoline) (frame, stop_pc); |
b18be20d DJ |
161 | } |
162 | ||
0d5de010 | 163 | struct value * |
aff410f1 MS |
164 | cplus_method_ptr_to_value (struct value **this_p, |
165 | struct value *method_ptr) | |
0d5de010 DJ |
166 | { |
167 | if (current_cp_abi.method_ptr_to_value == NULL) | |
168 | error (_("GDB does not support pointers to methods on this target")); | |
169 | return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr); | |
170 | } | |
171 | ||
c4aeac85 TT |
172 | /* See cp-abi.h. */ |
173 | ||
174 | void | |
175 | cplus_print_vtable (struct value *value) | |
176 | { | |
177 | if (current_cp_abi.print_vtable == NULL) | |
178 | error (_("GDB cannot print the vtable on this target")); | |
843e694d | 179 | (*current_cp_abi.print_vtable) (value); |
c4aeac85 TT |
180 | } |
181 | ||
6e72ca20 TT |
182 | /* See cp-abi.h. */ |
183 | ||
184 | struct value * | |
185 | cplus_typeid (struct value *value) | |
186 | { | |
187 | if (current_cp_abi.get_typeid == NULL) | |
188 | error (_("GDB cannot find the typeid on this target")); | |
189 | return (*current_cp_abi.get_typeid) (value); | |
190 | } | |
191 | ||
192 | /* See cp-abi.h. */ | |
193 | ||
194 | struct type * | |
195 | cplus_typeid_type (struct gdbarch *gdbarch) | |
196 | { | |
197 | if (current_cp_abi.get_typeid_type == NULL) | |
198 | error (_("GDB cannot find the type for 'typeid' on this target")); | |
199 | return (*current_cp_abi.get_typeid_type) (gdbarch); | |
200 | } | |
201 | ||
72f1fe8a TT |
202 | /* See cp-abi.h. */ |
203 | ||
204 | struct type * | |
205 | cplus_type_from_type_info (struct value *value) | |
206 | { | |
207 | if (current_cp_abi.get_type_from_type_info == NULL) | |
208 | error (_("GDB cannot find the type from a std::type_info on this target")); | |
209 | return (*current_cp_abi.get_type_from_type_info) (value); | |
210 | } | |
211 | ||
cc16e6c9 TT |
212 | /* See cp-abi.h. */ |
213 | ||
2f408ecb | 214 | std::string |
cc16e6c9 TT |
215 | cplus_typename_from_type_info (struct value *value) |
216 | { | |
217 | if (current_cp_abi.get_typename_from_type_info == NULL) | |
218 | error (_("GDB cannot find the type name " | |
219 | "from a std::type_info on this target")); | |
220 | return (*current_cp_abi.get_typename_from_type_info) (value); | |
221 | } | |
222 | ||
9d084466 TBA |
223 | /* See cp-abi.h. */ |
224 | ||
225 | struct language_pass_by_ref_info | |
41f1b697 DJ |
226 | cp_pass_by_reference (struct type *type) |
227 | { | |
228 | if ((current_cp_abi.pass_by_reference) == NULL) | |
48448202 | 229 | return {}; |
41f1b697 DJ |
230 | return (*current_cp_abi.pass_by_reference) (type); |
231 | } | |
232 | ||
fe1f4a5e DJ |
233 | /* Set the current C++ ABI to SHORT_NAME. */ |
234 | ||
235 | static int | |
236 | switch_to_cp_abi (const char *short_name) | |
237 | { | |
238 | struct cp_abi_ops *abi; | |
239 | ||
240 | abi = find_cp_abi (short_name); | |
241 | if (abi == NULL) | |
242 | return 0; | |
243 | ||
244 | current_cp_abi = *abi; | |
245 | return 1; | |
246 | } | |
247 | ||
248 | /* Add ABI to the list of supported C++ ABI's. */ | |
249 | ||
015a42b4 | 250 | int |
fe1f4a5e | 251 | register_cp_abi (struct cp_abi_ops *abi) |
015a42b4 | 252 | { |
fe1f4a5e | 253 | if (num_cp_abis == CP_ABI_MAX) |
f34652de | 254 | internal_error (_("Too many C++ ABIs, please increase " |
3e43a32a | 255 | "CP_ABI_MAX in cp-abi.c")); |
fe1f4a5e | 256 | |
015a42b4 JB |
257 | cp_abis[num_cp_abis++] = abi; |
258 | ||
259 | return 1; | |
fe1f4a5e DJ |
260 | } |
261 | ||
262 | /* Set the ABI to use in "auto" mode to SHORT_NAME. */ | |
015a42b4 | 263 | |
fe1f4a5e DJ |
264 | void |
265 | set_cp_abi_as_auto_default (const char *short_name) | |
266 | { | |
fe1f4a5e DJ |
267 | struct cp_abi_ops *abi = find_cp_abi (short_name); |
268 | ||
269 | if (abi == NULL) | |
f34652de | 270 | internal_error (_("Cannot find C++ ABI \"%s\" to set it as auto default."), |
fe1f4a5e DJ |
271 | short_name); |
272 | ||
84d53fa9 SM |
273 | xfree ((char *) auto_cp_abi.longname); |
274 | xfree ((char *) auto_cp_abi.doc); | |
fe1f4a5e DJ |
275 | |
276 | auto_cp_abi = *abi; | |
277 | ||
278 | auto_cp_abi.shortname = "auto"; | |
8579fd13 AB |
279 | auto_cp_abi.longname = xstrprintf ("currently \"%s\"", |
280 | abi->shortname).release (); | |
281 | auto_cp_abi.doc = xstrprintf ("Automatically selected; currently \"%s\"", | |
282 | abi->shortname).release (); | |
fe1f4a5e DJ |
283 | |
284 | /* Since we copy the current ABI into current_cp_abi instead of | |
285 | using a pointer, if auto is currently the default, we need to | |
286 | reset it. */ | |
287 | if (strcmp (current_cp_abi.shortname, "auto") == 0) | |
288 | switch_to_cp_abi ("auto"); | |
015a42b4 JB |
289 | } |
290 | ||
fe1f4a5e DJ |
291 | /* Return the ABI operations associated with SHORT_NAME. */ |
292 | ||
293 | static struct cp_abi_ops * | |
294 | find_cp_abi (const char *short_name) | |
015a42b4 JB |
295 | { |
296 | int i; | |
fe1f4a5e | 297 | |
015a42b4 | 298 | for (i = 0; i < num_cp_abis; i++) |
fe1f4a5e DJ |
299 | if (strcmp (cp_abis[i]->shortname, short_name) == 0) |
300 | return cp_abis[i]; | |
301 | ||
302 | return NULL; | |
015a42b4 JB |
303 | } |
304 | ||
fe1f4a5e DJ |
305 | /* Display the list of registered C++ ABIs. */ |
306 | ||
307 | static void | |
308 | list_cp_abis (int from_tty) | |
309 | { | |
79a45e25 | 310 | struct ui_out *uiout = current_uiout; |
fe1f4a5e | 311 | int i; |
fe1f4a5e | 312 | |
112e8700 | 313 | uiout->text ("The available C++ ABIs are:\n"); |
2e783024 | 314 | ui_out_emit_tuple tuple_emitter (uiout, "cp-abi-list"); |
fe1f4a5e DJ |
315 | for (i = 0; i < num_cp_abis; i++) |
316 | { | |
317 | char pad[14]; | |
318 | int padcount; | |
319 | ||
112e8700 SM |
320 | uiout->text (" "); |
321 | uiout->field_string ("cp-abi", cp_abis[i]->shortname); | |
fe1f4a5e DJ |
322 | |
323 | padcount = 16 - 2 - strlen (cp_abis[i]->shortname); | |
324 | pad[padcount] = 0; | |
325 | while (padcount > 0) | |
326 | pad[--padcount] = ' '; | |
112e8700 | 327 | uiout->text (pad); |
fe1f4a5e | 328 | |
112e8700 SM |
329 | uiout->field_string ("doc", cp_abis[i]->doc); |
330 | uiout->text ("\n"); | |
fe1f4a5e | 331 | } |
fe1f4a5e DJ |
332 | } |
333 | ||
334 | /* Set the current C++ ABI, or display the list of options if no | |
335 | argument is given. */ | |
336 | ||
337 | static void | |
4ada038f | 338 | set_cp_abi_cmd (const char *args, int from_tty) |
fe1f4a5e DJ |
339 | { |
340 | if (args == NULL) | |
341 | { | |
342 | list_cp_abis (from_tty); | |
343 | return; | |
344 | } | |
345 | ||
346 | if (!switch_to_cp_abi (args)) | |
8a3fe4f8 | 347 | error (_("Could not find \"%s\" in ABI list"), args); |
fe1f4a5e DJ |
348 | } |
349 | ||
db2b2972 TT |
350 | /* A completion function for "set cp-abi". */ |
351 | ||
eb3ff9a5 | 352 | static void |
db2b2972 | 353 | cp_abi_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 354 | completion_tracker &tracker, |
6f937416 | 355 | const char *text, const char *word) |
db2b2972 TT |
356 | { |
357 | static const char **cp_abi_names; | |
358 | ||
359 | if (cp_abi_names == NULL) | |
360 | { | |
361 | int i; | |
362 | ||
363 | cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1); | |
364 | for (i = 0; i < num_cp_abis; ++i) | |
365 | cp_abi_names[i] = cp_abis[i]->shortname; | |
6108433d | 366 | cp_abi_names[i] = NULL; |
db2b2972 TT |
367 | } |
368 | ||
eb3ff9a5 | 369 | complete_on_enum (tracker, cp_abi_names, text, word); |
db2b2972 TT |
370 | } |
371 | ||
fe1f4a5e DJ |
372 | /* Show the currently selected C++ ABI. */ |
373 | ||
374 | static void | |
4ada038f | 375 | show_cp_abi_cmd (const char *args, int from_tty) |
fe1f4a5e | 376 | { |
79a45e25 PA |
377 | struct ui_out *uiout = current_uiout; |
378 | ||
112e8700 | 379 | uiout->text ("The currently selected C++ ABI is \""); |
fe1f4a5e | 380 | |
112e8700 SM |
381 | uiout->field_string ("cp-abi", current_cp_abi.shortname); |
382 | uiout->text ("\" ("); | |
383 | uiout->field_string ("longname", current_cp_abi.longname); | |
384 | uiout->text (").\n"); | |
fe1f4a5e DJ |
385 | } |
386 | ||
6c265988 | 387 | void _initialize_cp_abi (); |
fe1f4a5e | 388 | void |
6c265988 | 389 | _initialize_cp_abi () |
fe1f4a5e | 390 | { |
db2b2972 TT |
391 | struct cmd_list_element *c; |
392 | ||
fe1f4a5e DJ |
393 | register_cp_abi (&auto_cp_abi); |
394 | switch_to_cp_abi ("auto"); | |
395 | ||
db2b2972 | 396 | c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\ |
ac74f770 MS |
397 | Set the ABI used for inspecting C++ objects.\n\ |
398 | \"set cp-abi\" with no arguments will list the available ABIs."), | |
db2b2972 TT |
399 | &setlist); |
400 | set_cmd_completer (c, cp_abi_completer); | |
fe1f4a5e DJ |
401 | |
402 | add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd, | |
aff410f1 MS |
403 | _("Show the ABI used for inspecting C++ objects."), |
404 | &showlist); | |
fe1f4a5e | 405 | } |