Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
b811d2c2 | 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 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/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
4de283e4 TT |
21 | #include "gdb_obstack.h" |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "expression.h" | |
25 | #include "value.h" | |
26 | #include "command.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "demangle.h" | |
c906108c | 29 | #include "annotate.h" |
c906108c | 30 | #include "c-lang.h" |
4de283e4 | 31 | #include "target.h" |
b9d652ac | 32 | #include "cp-abi.h" |
4de283e4 | 33 | #include "valprint.h" |
d3cbe7ef | 34 | #include "cp-support.h" |
d55e5aa6 | 35 | #include "language.h" |
4de283e4 | 36 | #include "extension.h" |
79d43c61 | 37 | #include "typeprint.h" |
268a13a5 | 38 | #include "gdbsupport/byte-vector.h" |
0d12e84c | 39 | #include "gdbarch.h" |
7f6aba03 | 40 | #include "cli/cli-style.h" |
c906108c | 41 | |
c906108c SS |
42 | static struct obstack dont_print_vb_obstack; |
43 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 44 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 45 | |
6943961c | 46 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
47 | struct ui_file *, int, |
48 | const struct value_print_options *); | |
c906108c | 49 | |
fbf54e75 TT |
50 | static void cp_print_value (struct value *, struct ui_file *, |
51 | int, const struct value_print_options *, | |
52 | struct type **); | |
53 | ||
c906108c | 54 | |
8343f86c | 55 | /* GCC versions after 2.4.5 use this. */ |
bad5c026 | 56 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 57 | |
c906108c SS |
58 | /* Return truth value for assertion that TYPE is of the type |
59 | "pointer to virtual function". */ | |
60 | ||
61 | int | |
fba45db2 | 62 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 63 | { |
a737d952 | 64 | const char *type_name = TYPE_NAME (type); |
c906108c | 65 | |
fe978cb0 | 66 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
67 | } |
68 | ||
69 | /* Return truth value for the assertion that TYPE is of the type | |
70 | "pointer to virtual function table". */ | |
71 | ||
72 | int | |
fba45db2 | 73 | cp_is_vtbl_member (struct type *type) |
c906108c | 74 | { |
aff410f1 MS |
75 | /* With older versions of g++, the vtbl field pointed to an array of |
76 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
77 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
78 | { | |
79 | type = TYPE_TARGET_TYPE (type); | |
80 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
81 | { | |
82 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
83 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
84 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
85 | { |
86 | /* Virtual functions tables are full of pointers | |
aff410f1 | 87 | to virtual functions. */ |
c906108c SS |
88 | return cp_is_vtbl_ptr_type (type); |
89 | } | |
90 | } | |
0e5e3ea6 PS |
91 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
92 | { | |
93 | return cp_is_vtbl_ptr_type (type); | |
94 | } | |
95 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
96 | { | |
aff410f1 MS |
97 | /* The type name of the thunk pointer is NULL when using |
98 | dwarf2. We could test for a pointer to a function, but | |
99 | there is no type info for the virtual table either, so it | |
100 | wont help. */ | |
0e5e3ea6 PS |
101 | return cp_is_vtbl_ptr_type (type); |
102 | } | |
c906108c SS |
103 | } |
104 | return 0; | |
105 | } | |
106 | ||
107 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
108 | print out a structure's fields: cp_print_value_fields and |
109 | cp_print_value. | |
c5aa993b | 110 | |
aff410f1 MS |
111 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
112 | meanings as in cp_print_value and c_val_print. | |
c906108c | 113 | |
aff410f1 MS |
114 | 2nd argument REAL_TYPE is used to carry over the type of the |
115 | derived class across the recursion to base classes. | |
c906108c | 116 | |
aff410f1 MS |
117 | DONT_PRINT is an array of baseclass types that we should not print, |
118 | or zero if called from top level. */ | |
c906108c | 119 | |
64b653ca TT |
120 | void |
121 | cp_print_value_fields (struct value *val, struct ui_file *stream, | |
122 | int recurse, const struct value_print_options *options, | |
123 | struct type **dont_print_vb, | |
124 | int dont_print_statmem) | |
125 | { | |
126 | int i, len, n_baseclasses; | |
127 | int fields_seen = 0; | |
128 | static int last_set_recurse = -1; | |
129 | ||
130 | struct type *type = check_typedef (value_type (val)); | |
64b653ca TT |
131 | |
132 | if (recurse == 0) | |
133 | { | |
134 | /* Any object can be left on obstacks only during an unexpected | |
135 | error. */ | |
136 | ||
137 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) | |
138 | { | |
139 | obstack_free (&dont_print_statmem_obstack, NULL); | |
140 | obstack_begin (&dont_print_statmem_obstack, | |
141 | 32 * sizeof (CORE_ADDR)); | |
142 | } | |
143 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) | |
144 | { | |
145 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
146 | obstack_begin (&dont_print_stat_array_obstack, | |
147 | 32 * sizeof (struct type *)); | |
148 | } | |
149 | } | |
150 | ||
151 | fprintf_filtered (stream, "{"); | |
152 | len = TYPE_NFIELDS (type); | |
153 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
154 | ||
155 | /* First, print out baseclasses such that we don't print | |
156 | duplicates of virtual baseclasses. */ | |
157 | ||
158 | if (n_baseclasses > 0) | |
fbf54e75 | 159 | cp_print_value (val, stream, recurse + 1, options, dont_print_vb); |
64b653ca TT |
160 | |
161 | /* Second, print out data fields */ | |
162 | ||
163 | /* If there are no data fields, skip this part */ | |
164 | if (len == n_baseclasses || !len) | |
165 | fprintf_styled (stream, metadata_style.style (), "<No data fields>"); | |
166 | else | |
167 | { | |
168 | size_t statmem_obstack_initial_size = 0; | |
169 | size_t stat_array_obstack_initial_size = 0; | |
170 | struct type *vptr_basetype = NULL; | |
171 | int vptr_fieldno; | |
172 | ||
173 | if (dont_print_statmem == 0) | |
174 | { | |
175 | statmem_obstack_initial_size = | |
176 | obstack_object_size (&dont_print_statmem_obstack); | |
177 | ||
178 | if (last_set_recurse != recurse) | |
179 | { | |
180 | stat_array_obstack_initial_size = | |
181 | obstack_object_size (&dont_print_stat_array_obstack); | |
182 | ||
183 | last_set_recurse = recurse; | |
184 | } | |
185 | } | |
186 | ||
187 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); | |
188 | for (i = n_baseclasses; i < len; i++) | |
189 | { | |
190 | const gdb_byte *valaddr = value_contents_for_printing (val); | |
191 | ||
192 | /* If requested, skip printing of static fields. */ | |
193 | if (!options->static_field_print | |
194 | && field_is_static (&TYPE_FIELD (type, i))) | |
195 | continue; | |
196 | ||
197 | if (fields_seen) | |
198 | { | |
199 | fputs_filtered (",", stream); | |
200 | if (!options->prettyformat) | |
201 | fputs_filtered (" ", stream); | |
202 | } | |
203 | else if (n_baseclasses > 0) | |
204 | { | |
205 | if (options->prettyformat) | |
206 | { | |
207 | fprintf_filtered (stream, "\n"); | |
208 | print_spaces_filtered (2 + 2 * recurse, stream); | |
209 | fputs_filtered ("members of ", stream); | |
210 | fputs_filtered (TYPE_NAME (type), stream); | |
211 | fputs_filtered (":", stream); | |
212 | } | |
213 | } | |
214 | fields_seen = 1; | |
215 | ||
216 | if (options->prettyformat) | |
217 | { | |
218 | fprintf_filtered (stream, "\n"); | |
219 | print_spaces_filtered (2 + 2 * recurse, stream); | |
220 | } | |
221 | else | |
222 | { | |
223 | wrap_here (n_spaces (2 + 2 * recurse)); | |
224 | } | |
225 | ||
226 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
227 | ||
228 | if (field_is_static (&TYPE_FIELD (type, i))) | |
229 | { | |
230 | fputs_filtered ("static ", stream); | |
231 | fprintf_symbol_filtered (stream, | |
232 | TYPE_FIELD_NAME (type, i), | |
233 | current_language->la_language, | |
234 | DMGL_PARAMS | DMGL_ANSI); | |
235 | } | |
236 | else | |
237 | fputs_styled (TYPE_FIELD_NAME (type, i), | |
238 | variable_name_style.style (), stream); | |
239 | annotate_field_name_end (); | |
240 | ||
241 | /* We tweak various options in a few cases below. */ | |
242 | value_print_options options_copy = *options; | |
243 | value_print_options *opts = &options_copy; | |
244 | ||
245 | /* Do not print leading '=' in case of anonymous | |
246 | unions. */ | |
247 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
248 | fputs_filtered (" = ", stream); | |
249 | else | |
250 | { | |
251 | /* If this is an anonymous field then we want to consider it | |
252 | as though it is at its parent's depth when it comes to the | |
253 | max print depth. */ | |
254 | if (opts->max_depth != -1 && opts->max_depth < INT_MAX) | |
255 | ++opts->max_depth; | |
256 | } | |
257 | annotate_field_value (); | |
258 | ||
259 | if (!field_is_static (&TYPE_FIELD (type, i)) | |
260 | && TYPE_FIELD_PACKED (type, i)) | |
261 | { | |
262 | struct value *v; | |
263 | ||
264 | /* Bitfields require special handling, especially due to | |
265 | byte order problems. */ | |
266 | if (TYPE_FIELD_IGNORE (type, i)) | |
267 | { | |
268 | fputs_styled ("<optimized out or zero length>", | |
269 | metadata_style.style (), stream); | |
270 | } | |
271 | else if (value_bits_synthetic_pointer (val, | |
272 | TYPE_FIELD_BITPOS (type, | |
273 | i), | |
274 | TYPE_FIELD_BITSIZE (type, | |
275 | i))) | |
276 | { | |
277 | fputs_styled (_("<synthetic pointer>"), | |
278 | metadata_style.style (), stream); | |
279 | } | |
280 | else | |
281 | { | |
282 | opts->deref_ref = 0; | |
283 | ||
284 | v = value_field_bitfield (type, i, valaddr, | |
285 | value_embedded_offset (val), val); | |
286 | ||
287 | common_val_print (v, stream, recurse + 1, | |
288 | opts, current_language); | |
289 | } | |
290 | } | |
291 | else | |
292 | { | |
293 | if (TYPE_FIELD_IGNORE (type, i)) | |
294 | { | |
295 | fputs_styled ("<optimized out or zero length>", | |
296 | metadata_style.style (), stream); | |
297 | } | |
298 | else if (field_is_static (&TYPE_FIELD (type, i))) | |
299 | { | |
300 | try | |
301 | { | |
302 | struct value *v = value_static_field (type, i); | |
303 | ||
304 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), | |
305 | v, stream, recurse + 1, | |
306 | opts); | |
307 | } | |
308 | catch (const gdb_exception_error &ex) | |
309 | { | |
310 | fprintf_styled (stream, metadata_style.style (), | |
311 | _("<error reading variable: %s>"), | |
312 | ex.what ()); | |
313 | } | |
314 | } | |
315 | else if (i == vptr_fieldno && type == vptr_basetype) | |
316 | { | |
317 | int i_offset = TYPE_FIELD_BITPOS (type, i) / 8; | |
318 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
319 | ||
320 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
321 | { | |
322 | CORE_ADDR addr; | |
323 | ||
fbf54e75 | 324 | i_offset += value_embedded_offset (val); |
64b653ca TT |
325 | addr = extract_typed_address (valaddr + i_offset, i_type); |
326 | print_function_pointer_address (opts, | |
327 | get_type_arch (type), | |
328 | addr, stream); | |
329 | } | |
330 | } | |
331 | else | |
332 | { | |
333 | struct value *v = value_primitive_field (val, 0, i, type); | |
334 | opts->deref_ref = 0; | |
335 | common_val_print (v, stream, recurse + 1, opts, | |
336 | current_language); | |
337 | } | |
338 | } | |
339 | annotate_field_end (); | |
340 | } | |
341 | ||
342 | if (dont_print_statmem == 0) | |
343 | { | |
344 | size_t obstack_final_size = | |
345 | obstack_object_size (&dont_print_statmem_obstack); | |
346 | ||
347 | if (obstack_final_size > statmem_obstack_initial_size) | |
348 | { | |
349 | /* In effect, a pop of the printed-statics stack. */ | |
350 | size_t shrink_bytes | |
351 | = statmem_obstack_initial_size - obstack_final_size; | |
352 | obstack_blank_fast (&dont_print_statmem_obstack, shrink_bytes); | |
353 | } | |
354 | ||
355 | if (last_set_recurse != recurse) | |
356 | { | |
357 | obstack_final_size = | |
358 | obstack_object_size (&dont_print_stat_array_obstack); | |
359 | ||
360 | if (obstack_final_size > stat_array_obstack_initial_size) | |
361 | { | |
362 | void *free_to_ptr = | |
363 | (char *) obstack_next_free (&dont_print_stat_array_obstack) | |
364 | - (obstack_final_size | |
365 | - stat_array_obstack_initial_size); | |
366 | ||
367 | obstack_free (&dont_print_stat_array_obstack, | |
368 | free_to_ptr); | |
369 | } | |
370 | last_set_recurse = -1; | |
371 | } | |
372 | } | |
373 | ||
374 | if (options->prettyformat) | |
375 | { | |
376 | fprintf_filtered (stream, "\n"); | |
377 | print_spaces_filtered (2 * recurse, stream); | |
378 | } | |
379 | } /* if there are data fields */ | |
380 | ||
381 | fprintf_filtered (stream, "}"); | |
382 | } | |
383 | ||
fbf54e75 TT |
384 | /* Special val_print routine to avoid printing multiple copies of |
385 | virtual baseclasses. */ | |
386 | ||
387 | static void | |
388 | cp_print_value (struct value *val, struct ui_file *stream, | |
389 | int recurse, const struct value_print_options *options, | |
390 | struct type **dont_print_vb) | |
391 | { | |
392 | struct type *type = check_typedef (value_type (val)); | |
393 | CORE_ADDR address = value_address (val); | |
394 | struct type **last_dont_print | |
395 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); | |
396 | struct obstack tmp_obstack = dont_print_vb_obstack; | |
397 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); | |
398 | const gdb_byte *valaddr = value_contents_for_printing (val); | |
399 | ||
400 | if (dont_print_vb == 0) | |
401 | { | |
402 | /* If we're at top level, carve out a completely fresh chunk of | |
403 | the obstack and use that until this particular invocation | |
404 | returns. */ | |
405 | /* Bump up the high-water mark. Now alpha is omega. */ | |
406 | obstack_finish (&dont_print_vb_obstack); | |
407 | } | |
408 | ||
409 | for (i = 0; i < n_baseclasses; i++) | |
410 | { | |
411 | LONGEST boffset = 0; | |
412 | int skip = 0; | |
413 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
414 | const char *basename = TYPE_NAME (baseclass); | |
415 | struct value *base_val = NULL; | |
416 | ||
417 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
418 | { | |
419 | struct type **first_dont_print | |
420 | = (struct type **) obstack_base (&dont_print_vb_obstack); | |
421 | ||
422 | int j = (struct type **) | |
423 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
424 | ||
425 | while (--j >= 0) | |
426 | if (baseclass == first_dont_print[j]) | |
427 | goto flush_it; | |
428 | ||
429 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
430 | } | |
431 | ||
432 | try | |
433 | { | |
434 | boffset = baseclass_offset (type, i, valaddr, | |
435 | value_embedded_offset (val), | |
436 | address, val); | |
437 | } | |
438 | catch (const gdb_exception_error &ex) | |
439 | { | |
440 | if (ex.error == NOT_AVAILABLE_ERROR) | |
441 | skip = -1; | |
442 | else | |
443 | skip = 1; | |
444 | } | |
445 | ||
446 | if (skip == 0) | |
447 | { | |
448 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
449 | { | |
450 | /* The virtual base class pointer might have been | |
451 | clobbered by the user program. Make sure that it | |
452 | still points to a valid memory location. */ | |
453 | ||
454 | if (boffset < 0 || boffset >= TYPE_LENGTH (type)) | |
455 | { | |
456 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); | |
457 | ||
458 | if (target_read_memory (address + boffset, buf.data (), | |
459 | TYPE_LENGTH (baseclass)) != 0) | |
460 | skip = 1; | |
461 | base_val = value_from_contents_and_address (baseclass, | |
462 | buf.data (), | |
463 | address + boffset); | |
464 | baseclass = value_type (base_val); | |
465 | boffset = 0; | |
466 | } | |
467 | else | |
468 | { | |
469 | base_val = val; | |
470 | } | |
471 | } | |
472 | else | |
473 | { | |
474 | base_val = val; | |
475 | } | |
476 | } | |
477 | ||
478 | /* Now do the printing. */ | |
479 | if (options->prettyformat) | |
480 | { | |
481 | fprintf_filtered (stream, "\n"); | |
482 | print_spaces_filtered (2 * recurse, stream); | |
483 | } | |
484 | fputs_filtered ("<", stream); | |
485 | /* Not sure what the best notation is in the case where there is | |
486 | no baseclass name. */ | |
487 | fputs_filtered (basename ? basename : "", stream); | |
488 | fputs_filtered ("> = ", stream); | |
489 | ||
490 | if (skip < 0) | |
491 | val_print_unavailable (stream); | |
492 | else if (skip > 0) | |
493 | val_print_invalid_address (stream); | |
494 | else | |
495 | { | |
496 | int result = 0; | |
497 | ||
498 | if (options->max_depth > -1 | |
499 | && recurse >= options->max_depth) | |
500 | { | |
501 | const struct language_defn *language = current_language; | |
502 | gdb_assert (language->la_struct_too_deep_ellipsis != NULL); | |
503 | fputs_filtered (language->la_struct_too_deep_ellipsis, stream); | |
504 | } | |
505 | else | |
506 | { | |
42331a1e TT |
507 | struct value *baseclass_val = value_primitive_field (val, 0, |
508 | i, type); | |
509 | ||
fbf54e75 TT |
510 | /* Attempt to run an extension language pretty-printer on the |
511 | baseclass if possible. */ | |
512 | if (!options->raw) | |
513 | result | |
42331a1e TT |
514 | = apply_ext_lang_val_pretty_printer (baseclass_val, stream, |
515 | recurse, options, | |
fbf54e75 TT |
516 | current_language); |
517 | ||
518 | if (!result) | |
42331a1e | 519 | cp_print_value_fields (baseclass_val, stream, recurse, options, |
fbf54e75 TT |
520 | ((struct type **) |
521 | obstack_base (&dont_print_vb_obstack)), | |
522 | 0); | |
523 | } | |
524 | } | |
525 | fputs_filtered (", ", stream); | |
526 | ||
527 | flush_it: | |
528 | ; | |
529 | } | |
530 | ||
531 | if (dont_print_vb == 0) | |
532 | { | |
533 | /* Free the space used to deal with the printing | |
534 | of this type from top level. */ | |
535 | obstack_free (&dont_print_vb_obstack, last_dont_print); | |
536 | /* Reset watermark so that we can continue protecting | |
537 | ourselves from whatever we were protecting ourselves. */ | |
538 | dont_print_vb_obstack = tmp_obstack; | |
539 | } | |
540 | } | |
541 | ||
aff410f1 MS |
542 | /* Print value of a static member. To avoid infinite recursion when |
543 | printing a class that contains a static instance of the class, we | |
544 | keep the addresses of all printed static member classes in an | |
545 | obstack and refuse to print them more than once. | |
c906108c | 546 | |
79a45b7d | 547 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
548 | have the same meanings as in c_val_print. */ |
549 | ||
550 | static void | |
2c63a960 | 551 | cp_print_static_field (struct type *type, |
6943961c | 552 | struct value *val, |
2c63a960 | 553 | struct ui_file *stream, |
2c63a960 | 554 | int recurse, |
79a45b7d | 555 | const struct value_print_options *options) |
c906108c | 556 | { |
79a45b7d | 557 | struct value_print_options opts; |
686d4def PA |
558 | |
559 | if (value_entirely_optimized_out (val)) | |
560 | { | |
561 | val_print_optimized_out (val, stream); | |
562 | return; | |
563 | } | |
564 | ||
79f18731 WP |
565 | struct type *real_type = check_typedef (type); |
566 | if (TYPE_CODE (real_type) == TYPE_CODE_STRUCT) | |
c906108c SS |
567 | { |
568 | CORE_ADDR *first_dont_print; | |
426a9c18 | 569 | CORE_ADDR addr = value_address (val); |
c906108c SS |
570 | int i; |
571 | ||
572 | first_dont_print | |
c5aa993b | 573 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
574 | i = obstack_object_size (&dont_print_statmem_obstack) |
575 | / sizeof (CORE_ADDR); | |
c906108c SS |
576 | |
577 | while (--i >= 0) | |
578 | { | |
426a9c18 | 579 | if (addr == first_dont_print[i]) |
c906108c | 580 | { |
2dbc041e TT |
581 | fputs_styled (_("<same as static member of an already" |
582 | " seen type>"), | |
583 | metadata_style.style (), stream); | |
c906108c SS |
584 | return; |
585 | } | |
586 | } | |
587 | ||
42ae5230 | 588 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, |
c906108c | 589 | sizeof (CORE_ADDR)); |
426a9c18 | 590 | cp_print_value_fields (val, stream, recurse, options, NULL, 1); |
c906108c SS |
591 | return; |
592 | } | |
79a45b7d | 593 | |
79f18731 | 594 | if (TYPE_CODE (real_type) == TYPE_CODE_ARRAY) |
ec31cde5 CM |
595 | { |
596 | struct type **first_dont_print; | |
597 | int i; | |
598 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
599 | ||
600 | first_dont_print | |
601 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
602 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 603 | / sizeof (struct type *); |
ec31cde5 CM |
604 | |
605 | while (--i >= 0) | |
606 | { | |
607 | if (target_type == first_dont_print[i]) | |
608 | { | |
2dbc041e TT |
609 | fputs_styled (_("<same as static member of an already" |
610 | " seen type>"), | |
611 | metadata_style.style (), stream); | |
ec31cde5 CM |
612 | return; |
613 | } | |
614 | } | |
615 | ||
aff410f1 MS |
616 | obstack_grow (&dont_print_stat_array_obstack, |
617 | (char *) &target_type, | |
ec31cde5 CM |
618 | sizeof (struct type *)); |
619 | } | |
620 | ||
79a45b7d TT |
621 | opts = *options; |
622 | opts.deref_ref = 0; | |
410cf315 | 623 | common_val_print (val, stream, recurse, &opts, current_language); |
c906108c SS |
624 | } |
625 | ||
09e2d7c7 DE |
626 | /* Find the field in *SELF, or its non-virtual base classes, with |
627 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 628 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 629 | start of some field, set *SELF to NULL. */ |
0d5de010 | 630 | |
2c0b251b | 631 | static void |
09e2d7c7 | 632 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
633 | LONGEST offset) |
634 | { | |
09e2d7c7 | 635 | struct type *self; |
0d5de010 DJ |
636 | unsigned int i; |
637 | unsigned len; | |
638 | ||
09e2d7c7 DE |
639 | *self_p = check_typedef (*self_p); |
640 | self = *self_p; | |
641 | len = TYPE_NFIELDS (self); | |
0d5de010 | 642 | |
09e2d7c7 | 643 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 644 | { |
09e2d7c7 | 645 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
646 | |
647 | QUIT; | |
648 | if (offset == bitpos) | |
649 | { | |
650 | *fieldno = i; | |
651 | return; | |
652 | } | |
653 | } | |
654 | ||
09e2d7c7 | 655 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 656 | { |
09e2d7c7 DE |
657 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
658 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
659 | |
660 | if (offset >= bitpos && offset < bitpos + bitsize) | |
661 | { | |
09e2d7c7 DE |
662 | *self_p = TYPE_FIELD_TYPE (self, i); |
663 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
664 | return; |
665 | } | |
666 | } | |
667 | ||
09e2d7c7 | 668 | *self_p = NULL; |
0d5de010 DJ |
669 | } |
670 | ||
c906108c | 671 | void |
ad4820ab | 672 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 673 | struct ui_file *stream, const char *prefix) |
c906108c | 674 | { |
34877895 | 675 | enum bfd_endian byte_order = type_byte_order (type); |
e17a4113 | 676 | |
09e2d7c7 | 677 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
678 | Find the name of the field for that offset and |
679 | print it. */ | |
09e2d7c7 | 680 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 681 | LONGEST val; |
9f8afa72 | 682 | int fieldno; |
c906108c | 683 | |
aff410f1 MS |
684 | val = extract_signed_integer (valaddr, |
685 | TYPE_LENGTH (type), | |
686 | byte_order); | |
e17a4113 | 687 | |
0d5de010 DJ |
688 | /* Pointers to data members are usually byte offsets into an object. |
689 | Because a data member can have offset zero, and a NULL pointer to | |
690 | member must be distinct from any valid non-NULL pointer to | |
691 | member, either the value is biased or the NULL value has a | |
692 | special representation; both are permitted by ISO C++. HP aCC | |
693 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
694 | and other compilers which use the Itanium ABI use -1 as the NULL | |
695 | value. GDB only supports that last form; to add support for | |
696 | another form, make this into a cp-abi hook. */ | |
c906108c | 697 | |
0d5de010 | 698 | if (val == -1) |
c906108c | 699 | { |
0d5de010 DJ |
700 | fprintf_filtered (stream, "NULL"); |
701 | return; | |
c906108c | 702 | } |
0d5de010 | 703 | |
09e2d7c7 | 704 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 705 | |
09e2d7c7 | 706 | if (self_type != NULL) |
c906108c | 707 | { |
0d5cff50 | 708 | const char *name; |
c5504eaf | 709 | |
306d9ac5 | 710 | fputs_filtered (prefix, stream); |
a737d952 | 711 | name = TYPE_NAME (self_type); |
c906108c | 712 | if (name) |
c5aa993b | 713 | fputs_filtered (name, stream); |
c906108c | 714 | else |
09e2d7c7 | 715 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 716 | fprintf_filtered (stream, "::"); |
3f0cbb04 TT |
717 | fputs_styled (TYPE_FIELD_NAME (self_type, fieldno), |
718 | variable_name_style.style (), stream); | |
c906108c SS |
719 | } |
720 | else | |
0d5de010 | 721 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
722 | } |
723 | ||
724 | ||
6c265988 | 725 | void _initialize_cp_valprint (); |
c906108c | 726 | void |
6c265988 | 727 | _initialize_cp_valprint () |
c906108c | 728 | { |
aff410f1 MS |
729 | obstack_begin (&dont_print_stat_array_obstack, |
730 | 32 * sizeof (struct type *)); | |
731 | obstack_begin (&dont_print_statmem_obstack, | |
732 | 32 * sizeof (CORE_ADDR)); | |
733 | obstack_begin (&dont_print_vb_obstack, | |
734 | 32 * sizeof (struct type *)); | |
c906108c | 735 | } |