Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
42a4f53d | 3 | Copyright (C) 1986-2019 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" |
4de283e4 | 38 | #include "common/byte-vector.h" |
c906108c | 39 | |
aff410f1 | 40 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
41 | static void |
42 | show_vtblprint (struct ui_file *file, int from_tty, | |
43 | struct cmd_list_element *c, const char *value) | |
44 | { | |
45 | fprintf_filtered (file, _("\ | |
46 | Printing of C++ virtual function tables is %s.\n"), | |
47 | value); | |
48 | } | |
49 | ||
50 | /* Controls looking up an object's derived type using what we find in | |
51 | its vtables. */ | |
920d2a44 AC |
52 | static void |
53 | show_objectprint (struct ui_file *file, int from_tty, | |
54 | struct cmd_list_element *c, | |
55 | const char *value) | |
56 | { | |
57 | fprintf_filtered (file, _("\ | |
58 | Printing of object's derived type based on vtable info is %s.\n"), | |
59 | value); | |
60 | } | |
61 | ||
920d2a44 AC |
62 | static void |
63 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
64 | struct cmd_list_element *c, |
65 | const char *value) | |
920d2a44 | 66 | { |
aff410f1 MS |
67 | fprintf_filtered (file, |
68 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
69 | value); |
70 | } | |
71 | ||
c906108c SS |
72 | |
73 | static struct obstack dont_print_vb_obstack; | |
74 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 75 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 76 | |
6943961c | 77 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
78 | struct ui_file *, int, |
79 | const struct value_print_options *); | |
c906108c | 80 | |
aff410f1 | 81 | static void cp_print_value (struct type *, struct type *, |
65408fa6 | 82 | LONGEST, |
aff410f1 | 83 | CORE_ADDR, struct ui_file *, |
e8b24d9f | 84 | int, struct value *, |
aff410f1 MS |
85 | const struct value_print_options *, |
86 | struct type **); | |
c906108c | 87 | |
c906108c | 88 | |
8343f86c | 89 | /* GCC versions after 2.4.5 use this. */ |
ddb6d633 | 90 | extern const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 91 | |
c906108c SS |
92 | /* Return truth value for assertion that TYPE is of the type |
93 | "pointer to virtual function". */ | |
94 | ||
95 | int | |
fba45db2 | 96 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 97 | { |
a737d952 | 98 | const char *type_name = TYPE_NAME (type); |
c906108c | 99 | |
fe978cb0 | 100 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
101 | } |
102 | ||
103 | /* Return truth value for the assertion that TYPE is of the type | |
104 | "pointer to virtual function table". */ | |
105 | ||
106 | int | |
fba45db2 | 107 | cp_is_vtbl_member (struct type *type) |
c906108c | 108 | { |
aff410f1 MS |
109 | /* With older versions of g++, the vtbl field pointed to an array of |
110 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
111 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
112 | { | |
113 | type = TYPE_TARGET_TYPE (type); | |
114 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
115 | { | |
116 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
117 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
118 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
119 | { |
120 | /* Virtual functions tables are full of pointers | |
aff410f1 | 121 | to virtual functions. */ |
c906108c SS |
122 | return cp_is_vtbl_ptr_type (type); |
123 | } | |
124 | } | |
0e5e3ea6 PS |
125 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
126 | { | |
127 | return cp_is_vtbl_ptr_type (type); | |
128 | } | |
129 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
130 | { | |
aff410f1 MS |
131 | /* The type name of the thunk pointer is NULL when using |
132 | dwarf2. We could test for a pointer to a function, but | |
133 | there is no type info for the virtual table either, so it | |
134 | wont help. */ | |
0e5e3ea6 PS |
135 | return cp_is_vtbl_ptr_type (type); |
136 | } | |
c906108c SS |
137 | } |
138 | return 0; | |
139 | } | |
140 | ||
141 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
142 | print out a structure's fields: cp_print_value_fields and |
143 | cp_print_value. | |
c5aa993b | 144 | |
aff410f1 MS |
145 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
146 | meanings as in cp_print_value and c_val_print. | |
c906108c | 147 | |
aff410f1 MS |
148 | 2nd argument REAL_TYPE is used to carry over the type of the |
149 | derived class across the recursion to base classes. | |
c906108c | 150 | |
aff410f1 MS |
151 | DONT_PRINT is an array of baseclass types that we should not print, |
152 | or zero if called from top level. */ | |
c906108c SS |
153 | |
154 | void | |
a2bd3dcd | 155 | cp_print_value_fields (struct type *type, struct type *real_type, |
65408fa6 | 156 | LONGEST offset, |
aff410f1 | 157 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 158 | int recurse, struct value *val, |
79a45b7d | 159 | const struct value_print_options *options, |
aff410f1 MS |
160 | struct type **dont_print_vb, |
161 | int dont_print_statmem) | |
c906108c SS |
162 | { |
163 | int i, len, n_baseclasses; | |
c906108c | 164 | int fields_seen = 0; |
ec31cde5 | 165 | static int last_set_recurse = -1; |
c906108c | 166 | |
f168693b | 167 | type = check_typedef (type); |
99903ae3 | 168 | |
ec31cde5 CM |
169 | if (recurse == 0) |
170 | { | |
aff410f1 MS |
171 | /* Any object can be left on obstacks only during an unexpected |
172 | error. */ | |
6036c742 | 173 | |
ec31cde5 | 174 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
175 | { |
176 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
177 | obstack_begin (&dont_print_statmem_obstack, |
178 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 179 | } |
ec31cde5 | 180 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
181 | { |
182 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
183 | obstack_begin (&dont_print_stat_array_obstack, | |
184 | 32 * sizeof (struct type *)); | |
185 | } | |
ec31cde5 | 186 | } |
c906108c SS |
187 | |
188 | fprintf_filtered (stream, "{"); | |
189 | len = TYPE_NFIELDS (type); | |
190 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
191 | ||
192 | /* First, print out baseclasses such that we don't print | |
193 | duplicates of virtual baseclasses. */ | |
194 | ||
195 | if (n_baseclasses > 0) | |
65408fa6 | 196 | cp_print_value (type, real_type, |
aff410f1 MS |
197 | offset, address, stream, |
198 | recurse + 1, val, options, | |
199 | dont_print_vb); | |
c906108c SS |
200 | |
201 | /* Second, print out data fields */ | |
202 | ||
086280be UW |
203 | /* If there are no data fields, skip this part */ |
204 | if (len == n_baseclasses || !len) | |
c906108c SS |
205 | fprintf_filtered (stream, "<No data fields>"); |
206 | else | |
207 | { | |
241fd515 AM |
208 | size_t statmem_obstack_initial_size = 0; |
209 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
210 | struct type *vptr_basetype = NULL; |
211 | int vptr_fieldno; | |
212 | ||
c906108c SS |
213 | if (dont_print_statmem == 0) |
214 | { | |
f56dcb88 | 215 | statmem_obstack_initial_size = |
0b66f317 | 216 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
217 | |
218 | if (last_set_recurse != recurse) | |
219 | { | |
f56dcb88 CM |
220 | stat_array_obstack_initial_size = |
221 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 222 | |
ec31cde5 CM |
223 | last_set_recurse = recurse; |
224 | } | |
c906108c SS |
225 | } |
226 | ||
7977e5d2 | 227 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
228 | for (i = n_baseclasses; i < len; i++) |
229 | { | |
65408fa6 YQ |
230 | const gdb_byte *valaddr = value_contents_for_printing (val); |
231 | ||
c906108c | 232 | /* If requested, skip printing of static fields. */ |
79a45b7d | 233 | if (!options->static_field_print |
d6a843b5 | 234 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
235 | continue; |
236 | ||
c906108c | 237 | if (fields_seen) |
18c77628 AB |
238 | { |
239 | fputs_filtered (",", stream); | |
240 | if (!options->prettyformat) | |
241 | fputs_filtered (" ", stream); | |
242 | } | |
c906108c SS |
243 | else if (n_baseclasses > 0) |
244 | { | |
2a998fc0 | 245 | if (options->prettyformat) |
c906108c SS |
246 | { |
247 | fprintf_filtered (stream, "\n"); | |
248 | print_spaces_filtered (2 + 2 * recurse, stream); | |
249 | fputs_filtered ("members of ", stream); | |
a737d952 | 250 | fputs_filtered (TYPE_NAME (type), stream); |
18c77628 | 251 | fputs_filtered (":", stream); |
c906108c SS |
252 | } |
253 | } | |
254 | fields_seen = 1; | |
255 | ||
2a998fc0 | 256 | if (options->prettyformat) |
c906108c SS |
257 | { |
258 | fprintf_filtered (stream, "\n"); | |
259 | print_spaces_filtered (2 + 2 * recurse, stream); | |
260 | } | |
c5aa993b | 261 | else |
c906108c SS |
262 | { |
263 | wrap_here (n_spaces (2 + 2 * recurse)); | |
264 | } | |
e93a8774 TT |
265 | |
266 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
267 | ||
268 | if (field_is_static (&TYPE_FIELD (type, i))) | |
269 | fputs_filtered ("static ", stream); | |
270 | fprintf_symbol_filtered (stream, | |
271 | TYPE_FIELD_NAME (type, i), | |
272 | current_language->la_language, | |
273 | DMGL_PARAMS | DMGL_ANSI); | |
274 | annotate_field_name_end (); | |
275 | /* Do not print leading '=' in case of anonymous | |
276 | unions. */ | |
277 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
278 | fputs_filtered (" = ", stream); | |
279 | annotate_field_value (); | |
c906108c | 280 | |
d6a843b5 JK |
281 | if (!field_is_static (&TYPE_FIELD (type, i)) |
282 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 283 | { |
6943961c | 284 | struct value *v; |
c906108c | 285 | |
aff410f1 MS |
286 | /* Bitfields require special handling, especially due to |
287 | byte order problems. */ | |
c906108c SS |
288 | if (TYPE_FIELD_IGNORE (type, i)) |
289 | { | |
c5aa993b | 290 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 291 | } |
8cf6f0b1 TT |
292 | else if (value_bits_synthetic_pointer (val, |
293 | TYPE_FIELD_BITPOS (type, | |
294 | i), | |
295 | TYPE_FIELD_BITSIZE (type, | |
296 | i))) | |
297 | { | |
298 | fputs_filtered (_("<synthetic pointer>"), stream); | |
299 | } | |
c906108c SS |
300 | else |
301 | { | |
79a45b7d | 302 | struct value_print_options opts = *options; |
c5504eaf | 303 | |
79a45b7d | 304 | opts.deref_ref = 0; |
5467c6c8 PA |
305 | |
306 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 307 | |
79a45b7d | 308 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 309 | current_language); |
c906108c SS |
310 | } |
311 | } | |
312 | else | |
313 | { | |
314 | if (TYPE_FIELD_IGNORE (type, i)) | |
315 | { | |
aff410f1 MS |
316 | fputs_filtered ("<optimized out or zero length>", |
317 | stream); | |
c906108c | 318 | } |
d6a843b5 | 319 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 320 | { |
ee86786c TT |
321 | struct value *v = NULL; |
322 | ||
a70b8144 | 323 | try |
ee86786c TT |
324 | { |
325 | v = value_static_field (type, i); | |
326 | } | |
327 | ||
230d2906 | 328 | catch (const gdb_exception_error &ex) |
492d29ea PA |
329 | { |
330 | fprintf_filtered (stream, | |
331 | _("<error reading variable: %s>"), | |
3d6e9d23 | 332 | ex.what ()); |
492d29ea | 333 | } |
492d29ea | 334 | |
686d4def PA |
335 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
336 | v, stream, recurse + 1, | |
337 | options); | |
c906108c | 338 | } |
7977e5d2 | 339 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 340 | { |
a72c8f6a JK |
341 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
342 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
343 | ||
344 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
345 | { | |
346 | CORE_ADDR addr; | |
347 | ||
348 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
349 | print_function_pointer_address (options, |
350 | get_type_arch (type), | |
351 | addr, stream); | |
a72c8f6a | 352 | } |
410528f0 | 353 | } |
c906108c SS |
354 | else |
355 | { | |
79a45b7d | 356 | struct value_print_options opts = *options; |
c5504eaf | 357 | |
79a45b7d | 358 | opts.deref_ref = 0; |
c5aa993b | 359 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 360 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 361 | address, |
0e03807e | 362 | stream, recurse + 1, val, &opts, |
d8ca156b | 363 | current_language); |
c906108c SS |
364 | } |
365 | } | |
366 | annotate_field_end (); | |
367 | } | |
368 | ||
369 | if (dont_print_statmem == 0) | |
370 | { | |
241fd515 | 371 | size_t obstack_final_size = |
0b66f317 CM |
372 | obstack_object_size (&dont_print_statmem_obstack); |
373 | ||
aff410f1 MS |
374 | if (obstack_final_size > statmem_obstack_initial_size) |
375 | { | |
376 | /* In effect, a pop of the printed-statics stack. */ | |
a43f3893 PF |
377 | size_t shrink_bytes |
378 | = statmem_obstack_initial_size - obstack_final_size; | |
379 | obstack_blank_fast (&dont_print_statmem_obstack, shrink_bytes); | |
aff410f1 | 380 | } |
ec31cde5 CM |
381 | |
382 | if (last_set_recurse != recurse) | |
383 | { | |
b926417a | 384 | obstack_final_size = |
f56dcb88 CM |
385 | obstack_object_size (&dont_print_stat_array_obstack); |
386 | ||
387 | if (obstack_final_size > stat_array_obstack_initial_size) | |
388 | { | |
389 | void *free_to_ptr = | |
1ae1b8cc | 390 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
391 | - (obstack_final_size |
392 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
393 | |
394 | obstack_free (&dont_print_stat_array_obstack, | |
395 | free_to_ptr); | |
396 | } | |
ec31cde5 CM |
397 | last_set_recurse = -1; |
398 | } | |
c906108c SS |
399 | } |
400 | ||
2a998fc0 | 401 | if (options->prettyformat) |
c906108c SS |
402 | { |
403 | fprintf_filtered (stream, "\n"); | |
404 | print_spaces_filtered (2 * recurse, stream); | |
405 | } | |
c5aa993b | 406 | } /* if there are data fields */ |
c5aa993b | 407 | |
c906108c SS |
408 | fprintf_filtered (stream, "}"); |
409 | } | |
410 | ||
edf3d5f3 TT |
411 | /* Like cp_print_value_fields, but find the runtime type of the object |
412 | and pass it as the `real_type' argument to cp_print_value_fields. | |
413 | This function is a hack to work around the fact that | |
414 | common_val_print passes the embedded offset to val_print, but not | |
415 | the enclosing type. */ | |
416 | ||
417 | void | |
418 | cp_print_value_fields_rtti (struct type *type, | |
6b850546 | 419 | const gdb_byte *valaddr, LONGEST offset, |
edf3d5f3 TT |
420 | CORE_ADDR address, |
421 | struct ui_file *stream, int recurse, | |
e8b24d9f | 422 | struct value *val, |
edf3d5f3 | 423 | const struct value_print_options *options, |
c5504eaf MS |
424 | struct type **dont_print_vb, |
425 | int dont_print_statmem) | |
edf3d5f3 | 426 | { |
0e03807e TT |
427 | struct type *real_type = NULL; |
428 | ||
429 | /* We require all bits to be valid in order to attempt a | |
430 | conversion. */ | |
9a0dc9e3 PA |
431 | if (!value_bits_any_optimized_out (val, |
432 | TARGET_CHAR_BIT * offset, | |
433 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
434 | { |
435 | struct value *value; | |
6b850546 DT |
436 | int full, using_enc; |
437 | LONGEST top; | |
0e03807e TT |
438 | |
439 | /* Ugh, we have to convert back to a value here. */ | |
440 | value = value_from_contents_and_address (type, valaddr + offset, | |
441 | address + offset); | |
9f1f738a | 442 | type = value_type (value); |
aff410f1 MS |
443 | /* We don't actually care about most of the result here -- just |
444 | the type. We already have the correct offset, due to how | |
445 | val_print was initially called. */ | |
0e03807e TT |
446 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
447 | } | |
448 | ||
edf3d5f3 TT |
449 | if (!real_type) |
450 | real_type = type; | |
451 | ||
65408fa6 | 452 | cp_print_value_fields (type, real_type, offset, |
0e03807e | 453 | address, stream, recurse, val, options, |
edf3d5f3 TT |
454 | dont_print_vb, dont_print_statmem); |
455 | } | |
456 | ||
aff410f1 MS |
457 | /* Special val_print routine to avoid printing multiple copies of |
458 | virtual baseclasses. */ | |
c906108c SS |
459 | |
460 | static void | |
a2bd3dcd | 461 | cp_print_value (struct type *type, struct type *real_type, |
65408fa6 | 462 | LONGEST offset, |
aff410f1 | 463 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 464 | int recurse, struct value *val, |
79a45b7d TT |
465 | const struct value_print_options *options, |
466 | struct type **dont_print_vb) | |
c906108c | 467 | { |
c906108c | 468 | struct type **last_dont_print |
2c63a960 | 469 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 470 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 471 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
6b850546 | 472 | LONGEST thisoffset; |
b9d652ac | 473 | struct type *thistype; |
65408fa6 | 474 | const gdb_byte *valaddr = value_contents_for_printing (val); |
c906108c SS |
475 | |
476 | if (dont_print_vb == 0) | |
477 | { | |
aff410f1 MS |
478 | /* If we're at top level, carve out a completely fresh chunk of |
479 | the obstack and use that until this particular invocation | |
480 | returns. */ | |
c906108c SS |
481 | /* Bump up the high-water mark. Now alpha is omega. */ |
482 | obstack_finish (&dont_print_vb_obstack); | |
483 | } | |
484 | ||
485 | for (i = 0; i < n_baseclasses; i++) | |
486 | { | |
6b850546 | 487 | LONGEST boffset = 0; |
7556d4a4 | 488 | int skip = 0; |
c906108c | 489 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 490 | const char *basename = TYPE_NAME (baseclass); |
e8b24d9f | 491 | struct value *base_val = NULL; |
c906108c SS |
492 | |
493 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
494 | { | |
495 | struct type **first_dont_print | |
2c63a960 | 496 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 497 | |
aff410f1 MS |
498 | int j = (struct type **) |
499 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
500 | |
501 | while (--j >= 0) | |
502 | if (baseclass == first_dont_print[j]) | |
503 | goto flush_it; | |
504 | ||
505 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
506 | } | |
507 | ||
b9d652ac DJ |
508 | thisoffset = offset; |
509 | thistype = real_type; | |
086280be | 510 | |
a70b8144 | 511 | try |
c5aa993b | 512 | { |
8af8e3bc PA |
513 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
514 | } | |
230d2906 | 515 | catch (const gdb_exception_error &ex) |
7556d4a4 PA |
516 | { |
517 | if (ex.error == NOT_AVAILABLE_ERROR) | |
518 | skip = -1; | |
519 | else | |
520 | skip = 1; | |
521 | } | |
c906108c | 522 | |
7556d4a4 PA |
523 | if (skip == 0) |
524 | { | |
8af8e3bc | 525 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 526 | { |
8af8e3bc PA |
527 | /* The virtual base class pointer might have been |
528 | clobbered by the user program. Make sure that it | |
529 | still points to a valid memory location. */ | |
530 | ||
531 | if ((boffset + offset) < 0 | |
532 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
533 | { | |
26fcd5d7 | 534 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); |
d5161074 | 535 | |
26fcd5d7 | 536 | if (target_read_memory (address + boffset, buf.data (), |
8af8e3bc PA |
537 | TYPE_LENGTH (baseclass)) != 0) |
538 | skip = 1; | |
539 | base_val = value_from_contents_and_address (baseclass, | |
26fcd5d7 | 540 | buf.data (), |
8af8e3bc | 541 | address + boffset); |
9f1f738a | 542 | baseclass = value_type (base_val); |
8af8e3bc PA |
543 | thisoffset = 0; |
544 | boffset = 0; | |
545 | thistype = baseclass; | |
8af8e3bc PA |
546 | } |
547 | else | |
548 | { | |
8af8e3bc PA |
549 | base_val = val; |
550 | } | |
c5aa993b JM |
551 | } |
552 | else | |
de4127a3 | 553 | { |
de4127a3 PA |
554 | base_val = val; |
555 | } | |
c906108c SS |
556 | } |
557 | ||
aff410f1 | 558 | /* Now do the printing. */ |
2a998fc0 | 559 | if (options->prettyformat) |
c906108c SS |
560 | { |
561 | fprintf_filtered (stream, "\n"); | |
562 | print_spaces_filtered (2 * recurse, stream); | |
563 | } | |
564 | fputs_filtered ("<", stream); | |
aff410f1 MS |
565 | /* Not sure what the best notation is in the case where there is |
566 | no baseclass name. */ | |
c906108c SS |
567 | fputs_filtered (basename ? basename : "", stream); |
568 | fputs_filtered ("> = ", stream); | |
569 | ||
8af8e3bc PA |
570 | if (skip < 0) |
571 | val_print_unavailable (stream); | |
572 | else if (skip > 0) | |
573 | val_print_invalid_address (stream); | |
c906108c | 574 | else |
a6bac58e TT |
575 | { |
576 | int result = 0; | |
577 | ||
6dddc817 | 578 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
579 | baseclass if possible. */ |
580 | if (!options->raw) | |
6dddc817 | 581 | result |
668e1674 | 582 | = apply_ext_lang_val_pretty_printer (baseclass, |
6dddc817 DE |
583 | thisoffset + boffset, |
584 | value_address (base_val), | |
585 | stream, recurse, | |
586 | base_val, options, | |
587 | current_language); | |
de4127a3 | 588 | |
a6bac58e | 589 | if (!result) |
65408fa6 | 590 | cp_print_value_fields (baseclass, thistype, |
de4127a3 PA |
591 | thisoffset + boffset, |
592 | value_address (base_val), | |
593 | stream, recurse, base_val, options, | |
a6bac58e TT |
594 | ((struct type **) |
595 | obstack_base (&dont_print_vb_obstack)), | |
596 | 0); | |
597 | } | |
c906108c SS |
598 | fputs_filtered (", ", stream); |
599 | ||
600 | flush_it: | |
601 | ; | |
602 | } | |
603 | ||
604 | if (dont_print_vb == 0) | |
605 | { | |
606 | /* Free the space used to deal with the printing | |
c5aa993b | 607 | of this type from top level. */ |
c906108c SS |
608 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
609 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 610 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
611 | dont_print_vb_obstack = tmp_obstack; |
612 | } | |
613 | } | |
614 | ||
aff410f1 MS |
615 | /* Print value of a static member. To avoid infinite recursion when |
616 | printing a class that contains a static instance of the class, we | |
617 | keep the addresses of all printed static member classes in an | |
618 | obstack and refuse to print them more than once. | |
c906108c | 619 | |
79a45b7d | 620 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
621 | have the same meanings as in c_val_print. */ |
622 | ||
623 | static void | |
2c63a960 | 624 | cp_print_static_field (struct type *type, |
6943961c | 625 | struct value *val, |
2c63a960 | 626 | struct ui_file *stream, |
2c63a960 | 627 | int recurse, |
79a45b7d | 628 | const struct value_print_options *options) |
c906108c | 629 | { |
79a45b7d | 630 | struct value_print_options opts; |
686d4def PA |
631 | |
632 | if (value_entirely_optimized_out (val)) | |
633 | { | |
634 | val_print_optimized_out (val, stream); | |
635 | return; | |
636 | } | |
637 | ||
79f18731 WP |
638 | struct type *real_type = check_typedef (type); |
639 | if (TYPE_CODE (real_type) == TYPE_CODE_STRUCT) | |
c906108c SS |
640 | { |
641 | CORE_ADDR *first_dont_print; | |
42ae5230 | 642 | CORE_ADDR addr; |
c906108c SS |
643 | int i; |
644 | ||
645 | first_dont_print | |
c5aa993b | 646 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
647 | i = obstack_object_size (&dont_print_statmem_obstack) |
648 | / sizeof (CORE_ADDR); | |
c906108c SS |
649 | |
650 | while (--i >= 0) | |
651 | { | |
42ae5230 | 652 | if (value_address (val) == first_dont_print[i]) |
c906108c | 653 | { |
2c63a960 JB |
654 | fputs_filtered ("<same as static member of an already" |
655 | " seen type>", | |
c906108c SS |
656 | stream); |
657 | return; | |
658 | } | |
659 | } | |
660 | ||
42ae5230 TT |
661 | addr = value_address (val); |
662 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 663 | sizeof (CORE_ADDR)); |
edf3d5f3 | 664 | cp_print_value_fields (type, value_enclosing_type (val), |
42ae5230 | 665 | value_embedded_offset (val), addr, |
aff410f1 MS |
666 | stream, recurse, val, |
667 | options, NULL, 1); | |
c906108c SS |
668 | return; |
669 | } | |
79a45b7d | 670 | |
79f18731 | 671 | if (TYPE_CODE (real_type) == TYPE_CODE_ARRAY) |
ec31cde5 CM |
672 | { |
673 | struct type **first_dont_print; | |
674 | int i; | |
675 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
676 | ||
677 | first_dont_print | |
678 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
679 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 680 | / sizeof (struct type *); |
ec31cde5 CM |
681 | |
682 | while (--i >= 0) | |
683 | { | |
684 | if (target_type == first_dont_print[i]) | |
685 | { | |
686 | fputs_filtered ("<same as static member of an already" | |
687 | " seen type>", | |
688 | stream); | |
689 | return; | |
690 | } | |
691 | } | |
692 | ||
aff410f1 MS |
693 | obstack_grow (&dont_print_stat_array_obstack, |
694 | (char *) &target_type, | |
ec31cde5 CM |
695 | sizeof (struct type *)); |
696 | } | |
697 | ||
79a45b7d TT |
698 | opts = *options; |
699 | opts.deref_ref = 0; | |
e8b24d9f | 700 | val_print (type, |
aff410f1 MS |
701 | value_embedded_offset (val), |
702 | value_address (val), | |
703 | stream, recurse, val, | |
704 | &opts, current_language); | |
c906108c SS |
705 | } |
706 | ||
09e2d7c7 DE |
707 | /* Find the field in *SELF, or its non-virtual base classes, with |
708 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 709 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 710 | start of some field, set *SELF to NULL. */ |
0d5de010 | 711 | |
2c0b251b | 712 | static void |
09e2d7c7 | 713 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
714 | LONGEST offset) |
715 | { | |
09e2d7c7 | 716 | struct type *self; |
0d5de010 DJ |
717 | unsigned int i; |
718 | unsigned len; | |
719 | ||
09e2d7c7 DE |
720 | *self_p = check_typedef (*self_p); |
721 | self = *self_p; | |
722 | len = TYPE_NFIELDS (self); | |
0d5de010 | 723 | |
09e2d7c7 | 724 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 725 | { |
09e2d7c7 | 726 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
727 | |
728 | QUIT; | |
729 | if (offset == bitpos) | |
730 | { | |
731 | *fieldno = i; | |
732 | return; | |
733 | } | |
734 | } | |
735 | ||
09e2d7c7 | 736 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 737 | { |
09e2d7c7 DE |
738 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
739 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
740 | |
741 | if (offset >= bitpos && offset < bitpos + bitsize) | |
742 | { | |
09e2d7c7 DE |
743 | *self_p = TYPE_FIELD_TYPE (self, i); |
744 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
745 | return; |
746 | } | |
747 | } | |
748 | ||
09e2d7c7 | 749 | *self_p = NULL; |
0d5de010 DJ |
750 | } |
751 | ||
c906108c | 752 | void |
ad4820ab | 753 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 754 | struct ui_file *stream, const char *prefix) |
c906108c | 755 | { |
e17a4113 UW |
756 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
757 | ||
09e2d7c7 | 758 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
759 | Find the name of the field for that offset and |
760 | print it. */ | |
09e2d7c7 | 761 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 762 | LONGEST val; |
9f8afa72 | 763 | int fieldno; |
c906108c | 764 | |
aff410f1 MS |
765 | val = extract_signed_integer (valaddr, |
766 | TYPE_LENGTH (type), | |
767 | byte_order); | |
e17a4113 | 768 | |
0d5de010 DJ |
769 | /* Pointers to data members are usually byte offsets into an object. |
770 | Because a data member can have offset zero, and a NULL pointer to | |
771 | member must be distinct from any valid non-NULL pointer to | |
772 | member, either the value is biased or the NULL value has a | |
773 | special representation; both are permitted by ISO C++. HP aCC | |
774 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
775 | and other compilers which use the Itanium ABI use -1 as the NULL | |
776 | value. GDB only supports that last form; to add support for | |
777 | another form, make this into a cp-abi hook. */ | |
c906108c | 778 | |
0d5de010 | 779 | if (val == -1) |
c906108c | 780 | { |
0d5de010 DJ |
781 | fprintf_filtered (stream, "NULL"); |
782 | return; | |
c906108c | 783 | } |
0d5de010 | 784 | |
09e2d7c7 | 785 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 786 | |
09e2d7c7 | 787 | if (self_type != NULL) |
c906108c | 788 | { |
0d5cff50 | 789 | const char *name; |
c5504eaf | 790 | |
306d9ac5 | 791 | fputs_filtered (prefix, stream); |
a737d952 | 792 | name = TYPE_NAME (self_type); |
c906108c | 793 | if (name) |
c5aa993b | 794 | fputs_filtered (name, stream); |
c906108c | 795 | else |
09e2d7c7 | 796 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 797 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 798 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
799 | } |
800 | else | |
0d5de010 | 801 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
802 | } |
803 | ||
804 | ||
c906108c | 805 | void |
fba45db2 | 806 | _initialize_cp_valprint (void) |
c906108c | 807 | { |
5bf193a2 | 808 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 809 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
810 | Set printing of C++ static members."), _("\ |
811 | Show printing of C++ static members."), NULL, | |
812 | NULL, | |
920d2a44 | 813 | show_static_field_print, |
5bf193a2 | 814 | &setprintlist, &showprintlist); |
c906108c | 815 | |
79a45b7d TT |
816 | add_setshow_boolean_cmd ("vtbl", class_support, |
817 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
818 | Set printing of C++ virtual function tables."), _("\ |
819 | Show printing of C++ virtual function tables."), NULL, | |
820 | NULL, | |
920d2a44 | 821 | show_vtblprint, |
5bf193a2 AC |
822 | &setprintlist, &showprintlist); |
823 | ||
79a45b7d TT |
824 | add_setshow_boolean_cmd ("object", class_support, |
825 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
826 | Set printing of object's derived type based on vtable info."), _("\ |
827 | Show printing of object's derived type based on vtable info."), NULL, | |
828 | NULL, | |
920d2a44 | 829 | show_objectprint, |
5bf193a2 | 830 | &setprintlist, &showprintlist); |
c906108c | 831 | |
aff410f1 MS |
832 | obstack_begin (&dont_print_stat_array_obstack, |
833 | 32 * sizeof (struct type *)); | |
834 | obstack_begin (&dont_print_statmem_obstack, | |
835 | 32 * sizeof (CORE_ADDR)); | |
836 | obstack_begin (&dont_print_vb_obstack, | |
837 | 32 * sizeof (struct type *)); | |
c906108c | 838 | } |