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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
32d0add0 | 3 | Copyright (C) 1986-2015 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" | |
04ea0df1 | 21 | #include "gdb_obstack.h" |
c906108c SS |
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" | |
29 | #include "annotate.h" | |
c906108c SS |
30 | #include "c-lang.h" |
31 | #include "target.h" | |
b9d652ac | 32 | #include "cp-abi.h" |
973177d3 | 33 | #include "valprint.h" |
d3cbe7ef | 34 | #include "cp-support.h" |
cf309262 | 35 | #include "language.h" |
6dddc817 | 36 | #include "extension.h" |
79d43c61 | 37 | #include "typeprint.h" |
c906108c | 38 | |
aff410f1 | 39 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
40 | static void |
41 | show_vtblprint (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("\ | |
45 | Printing of C++ virtual function tables is %s.\n"), | |
46 | value); | |
47 | } | |
48 | ||
49 | /* Controls looking up an object's derived type using what we find in | |
50 | its vtables. */ | |
920d2a44 AC |
51 | static void |
52 | show_objectprint (struct ui_file *file, int from_tty, | |
53 | struct cmd_list_element *c, | |
54 | const char *value) | |
55 | { | |
56 | fprintf_filtered (file, _("\ | |
57 | Printing of object's derived type based on vtable info is %s.\n"), | |
58 | value); | |
59 | } | |
60 | ||
920d2a44 AC |
61 | static void |
62 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
63 | struct cmd_list_element *c, |
64 | const char *value) | |
920d2a44 | 65 | { |
aff410f1 MS |
66 | fprintf_filtered (file, |
67 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
68 | value); |
69 | } | |
70 | ||
c906108c SS |
71 | |
72 | static struct obstack dont_print_vb_obstack; | |
73 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 74 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 75 | |
a14ed312 | 76 | extern void _initialize_cp_valprint (void); |
392a587b | 77 | |
6943961c | 78 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
79 | struct ui_file *, int, |
80 | const struct value_print_options *); | |
c906108c | 81 | |
aff410f1 MS |
82 | static void cp_print_value (struct type *, struct type *, |
83 | const gdb_byte *, int, | |
84 | CORE_ADDR, struct ui_file *, | |
85 | int, const struct value *, | |
86 | const struct value_print_options *, | |
87 | struct type **); | |
c906108c | 88 | |
c906108c | 89 | |
8343f86c | 90 | /* GCC versions after 2.4.5 use this. */ |
7cf99fb1 | 91 | EXPORTED_CONST char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 92 | |
c906108c SS |
93 | /* Return truth value for assertion that TYPE is of the type |
94 | "pointer to virtual function". */ | |
95 | ||
96 | int | |
fba45db2 | 97 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 98 | { |
fe978cb0 | 99 | const char *type_name = type_name_no_tag (type); |
c906108c | 100 | |
fe978cb0 | 101 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
102 | } |
103 | ||
104 | /* Return truth value for the assertion that TYPE is of the type | |
105 | "pointer to virtual function table". */ | |
106 | ||
107 | int | |
fba45db2 | 108 | cp_is_vtbl_member (struct type *type) |
c906108c | 109 | { |
aff410f1 MS |
110 | /* With older versions of g++, the vtbl field pointed to an array of |
111 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
112 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
113 | { | |
114 | type = TYPE_TARGET_TYPE (type); | |
115 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
116 | { | |
117 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
118 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
119 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
120 | { |
121 | /* Virtual functions tables are full of pointers | |
aff410f1 | 122 | to virtual functions. */ |
c906108c SS |
123 | return cp_is_vtbl_ptr_type (type); |
124 | } | |
125 | } | |
0e5e3ea6 PS |
126 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
127 | { | |
128 | return cp_is_vtbl_ptr_type (type); | |
129 | } | |
130 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
131 | { | |
aff410f1 MS |
132 | /* The type name of the thunk pointer is NULL when using |
133 | dwarf2. We could test for a pointer to a function, but | |
134 | there is no type info for the virtual table either, so it | |
135 | wont help. */ | |
0e5e3ea6 PS |
136 | return cp_is_vtbl_ptr_type (type); |
137 | } | |
c906108c SS |
138 | } |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
143 | print out a structure's fields: cp_print_value_fields and |
144 | cp_print_value. | |
c5aa993b | 145 | |
aff410f1 MS |
146 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
147 | meanings as in cp_print_value and c_val_print. | |
c906108c | 148 | |
aff410f1 MS |
149 | 2nd argument REAL_TYPE is used to carry over the type of the |
150 | derived class across the recursion to base classes. | |
c906108c | 151 | |
aff410f1 MS |
152 | DONT_PRINT is an array of baseclass types that we should not print, |
153 | or zero if called from top level. */ | |
c906108c SS |
154 | |
155 | void | |
a2bd3dcd | 156 | cp_print_value_fields (struct type *type, struct type *real_type, |
aff410f1 MS |
157 | const gdb_byte *valaddr, int offset, |
158 | CORE_ADDR address, struct ui_file *stream, | |
159 | int recurse, const struct value *val, | |
79a45b7d | 160 | const struct value_print_options *options, |
aff410f1 MS |
161 | struct type **dont_print_vb, |
162 | int dont_print_statmem) | |
c906108c SS |
163 | { |
164 | int i, len, n_baseclasses; | |
c906108c | 165 | int fields_seen = 0; |
ec31cde5 | 166 | static int last_set_recurse = -1; |
c906108c | 167 | |
f168693b | 168 | type = check_typedef (type); |
99903ae3 | 169 | |
ec31cde5 CM |
170 | if (recurse == 0) |
171 | { | |
aff410f1 MS |
172 | /* Any object can be left on obstacks only during an unexpected |
173 | error. */ | |
6036c742 | 174 | |
ec31cde5 | 175 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
176 | { |
177 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
178 | obstack_begin (&dont_print_statmem_obstack, |
179 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 180 | } |
ec31cde5 | 181 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
182 | { |
183 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
184 | obstack_begin (&dont_print_stat_array_obstack, | |
185 | 32 * sizeof (struct type *)); | |
186 | } | |
ec31cde5 | 187 | } |
c906108c SS |
188 | |
189 | fprintf_filtered (stream, "{"); | |
190 | len = TYPE_NFIELDS (type); | |
191 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
192 | ||
193 | /* First, print out baseclasses such that we don't print | |
194 | duplicates of virtual baseclasses. */ | |
195 | ||
196 | if (n_baseclasses > 0) | |
aff410f1 MS |
197 | cp_print_value (type, real_type, valaddr, |
198 | offset, address, stream, | |
199 | recurse + 1, val, options, | |
200 | dont_print_vb); | |
c906108c SS |
201 | |
202 | /* Second, print out data fields */ | |
203 | ||
086280be UW |
204 | /* If there are no data fields, skip this part */ |
205 | if (len == n_baseclasses || !len) | |
c906108c SS |
206 | fprintf_filtered (stream, "<No data fields>"); |
207 | else | |
208 | { | |
241fd515 AM |
209 | size_t statmem_obstack_initial_size = 0; |
210 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
211 | struct type *vptr_basetype = NULL; |
212 | int vptr_fieldno; | |
213 | ||
c906108c SS |
214 | if (dont_print_statmem == 0) |
215 | { | |
f56dcb88 | 216 | statmem_obstack_initial_size = |
0b66f317 | 217 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
218 | |
219 | if (last_set_recurse != recurse) | |
220 | { | |
f56dcb88 CM |
221 | stat_array_obstack_initial_size = |
222 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 223 | |
ec31cde5 CM |
224 | last_set_recurse = recurse; |
225 | } | |
c906108c SS |
226 | } |
227 | ||
7977e5d2 | 228 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
229 | for (i = n_baseclasses; i < len; i++) |
230 | { | |
231 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 232 | if (!options->static_field_print |
d6a843b5 | 233 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
234 | continue; |
235 | ||
c906108c SS |
236 | if (fields_seen) |
237 | fprintf_filtered (stream, ", "); | |
238 | else if (n_baseclasses > 0) | |
239 | { | |
2a998fc0 | 240 | if (options->prettyformat) |
c906108c SS |
241 | { |
242 | fprintf_filtered (stream, "\n"); | |
243 | print_spaces_filtered (2 + 2 * recurse, stream); | |
244 | fputs_filtered ("members of ", stream); | |
245 | fputs_filtered (type_name_no_tag (type), stream); | |
246 | fputs_filtered (": ", stream); | |
247 | } | |
248 | } | |
249 | fields_seen = 1; | |
250 | ||
2a998fc0 | 251 | if (options->prettyformat) |
c906108c SS |
252 | { |
253 | fprintf_filtered (stream, "\n"); | |
254 | print_spaces_filtered (2 + 2 * recurse, stream); | |
255 | } | |
c5aa993b | 256 | else |
c906108c SS |
257 | { |
258 | wrap_here (n_spaces (2 + 2 * recurse)); | |
259 | } | |
e93a8774 TT |
260 | |
261 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
262 | ||
263 | if (field_is_static (&TYPE_FIELD (type, i))) | |
264 | fputs_filtered ("static ", stream); | |
265 | fprintf_symbol_filtered (stream, | |
266 | TYPE_FIELD_NAME (type, i), | |
267 | current_language->la_language, | |
268 | DMGL_PARAMS | DMGL_ANSI); | |
269 | annotate_field_name_end (); | |
270 | /* Do not print leading '=' in case of anonymous | |
271 | unions. */ | |
272 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
273 | fputs_filtered (" = ", stream); | |
274 | annotate_field_value (); | |
c906108c | 275 | |
d6a843b5 JK |
276 | if (!field_is_static (&TYPE_FIELD (type, i)) |
277 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 278 | { |
6943961c | 279 | struct value *v; |
c906108c | 280 | |
aff410f1 MS |
281 | /* Bitfields require special handling, especially due to |
282 | byte order problems. */ | |
c906108c SS |
283 | if (TYPE_FIELD_IGNORE (type, i)) |
284 | { | |
c5aa993b | 285 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 286 | } |
8cf6f0b1 TT |
287 | else if (value_bits_synthetic_pointer (val, |
288 | TYPE_FIELD_BITPOS (type, | |
289 | i), | |
290 | TYPE_FIELD_BITSIZE (type, | |
291 | i))) | |
292 | { | |
293 | fputs_filtered (_("<synthetic pointer>"), stream); | |
294 | } | |
c906108c SS |
295 | else |
296 | { | |
79a45b7d | 297 | struct value_print_options opts = *options; |
c5504eaf | 298 | |
79a45b7d | 299 | opts.deref_ref = 0; |
5467c6c8 PA |
300 | |
301 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 302 | |
79a45b7d | 303 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 304 | current_language); |
c906108c SS |
305 | } |
306 | } | |
307 | else | |
308 | { | |
309 | if (TYPE_FIELD_IGNORE (type, i)) | |
310 | { | |
aff410f1 MS |
311 | fputs_filtered ("<optimized out or zero length>", |
312 | stream); | |
c906108c | 313 | } |
d6a843b5 | 314 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 315 | { |
ee86786c TT |
316 | struct value *v = NULL; |
317 | ||
492d29ea | 318 | TRY |
ee86786c TT |
319 | { |
320 | v = value_static_field (type, i); | |
321 | } | |
322 | ||
492d29ea PA |
323 | CATCH (ex, RETURN_MASK_ERROR) |
324 | { | |
325 | fprintf_filtered (stream, | |
326 | _("<error reading variable: %s>"), | |
327 | ex.message); | |
328 | } | |
329 | END_CATCH | |
330 | ||
686d4def PA |
331 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
332 | v, stream, recurse + 1, | |
333 | options); | |
c906108c | 334 | } |
7977e5d2 | 335 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 336 | { |
a72c8f6a JK |
337 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
338 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
339 | ||
340 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
341 | { | |
342 | CORE_ADDR addr; | |
343 | ||
344 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
345 | print_function_pointer_address (options, |
346 | get_type_arch (type), | |
347 | addr, stream); | |
a72c8f6a | 348 | } |
410528f0 | 349 | } |
c906108c SS |
350 | else |
351 | { | |
79a45b7d | 352 | struct value_print_options opts = *options; |
c5504eaf | 353 | |
79a45b7d | 354 | opts.deref_ref = 0; |
c5aa993b | 355 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
356 | valaddr, |
357 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 358 | address, |
0e03807e | 359 | stream, recurse + 1, val, &opts, |
d8ca156b | 360 | current_language); |
c906108c SS |
361 | } |
362 | } | |
363 | annotate_field_end (); | |
364 | } | |
365 | ||
366 | if (dont_print_statmem == 0) | |
367 | { | |
241fd515 | 368 | size_t obstack_final_size = |
0b66f317 CM |
369 | obstack_object_size (&dont_print_statmem_obstack); |
370 | ||
aff410f1 MS |
371 | if (obstack_final_size > statmem_obstack_initial_size) |
372 | { | |
373 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 374 | |
aff410f1 | 375 | void *free_to_ptr = |
1ae1b8cc | 376 | (char *) obstack_next_free (&dont_print_statmem_obstack) - |
aff410f1 | 377 | (obstack_final_size - statmem_obstack_initial_size); |
0b66f317 | 378 | |
aff410f1 MS |
379 | obstack_free (&dont_print_statmem_obstack, |
380 | free_to_ptr); | |
381 | } | |
ec31cde5 CM |
382 | |
383 | if (last_set_recurse != recurse) | |
384 | { | |
241fd515 | 385 | size_t obstack_final_size = |
f56dcb88 CM |
386 | obstack_object_size (&dont_print_stat_array_obstack); |
387 | ||
388 | if (obstack_final_size > stat_array_obstack_initial_size) | |
389 | { | |
390 | void *free_to_ptr = | |
1ae1b8cc | 391 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
392 | - (obstack_final_size |
393 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
394 | |
395 | obstack_free (&dont_print_stat_array_obstack, | |
396 | free_to_ptr); | |
397 | } | |
ec31cde5 CM |
398 | last_set_recurse = -1; |
399 | } | |
c906108c SS |
400 | } |
401 | ||
2a998fc0 | 402 | if (options->prettyformat) |
c906108c SS |
403 | { |
404 | fprintf_filtered (stream, "\n"); | |
405 | print_spaces_filtered (2 * recurse, stream); | |
406 | } | |
c5aa993b | 407 | } /* if there are data fields */ |
c5aa993b | 408 | |
c906108c SS |
409 | fprintf_filtered (stream, "}"); |
410 | } | |
411 | ||
edf3d5f3 TT |
412 | /* Like cp_print_value_fields, but find the runtime type of the object |
413 | and pass it as the `real_type' argument to cp_print_value_fields. | |
414 | This function is a hack to work around the fact that | |
415 | common_val_print passes the embedded offset to val_print, but not | |
416 | the enclosing type. */ | |
417 | ||
418 | void | |
419 | cp_print_value_fields_rtti (struct type *type, | |
420 | const gdb_byte *valaddr, int offset, | |
421 | CORE_ADDR address, | |
422 | struct ui_file *stream, int recurse, | |
0e03807e | 423 | const struct value *val, |
edf3d5f3 | 424 | const struct value_print_options *options, |
c5504eaf MS |
425 | struct type **dont_print_vb, |
426 | int dont_print_statmem) | |
edf3d5f3 | 427 | { |
0e03807e TT |
428 | struct type *real_type = NULL; |
429 | ||
430 | /* We require all bits to be valid in order to attempt a | |
431 | conversion. */ | |
9a0dc9e3 PA |
432 | if (!value_bits_any_optimized_out (val, |
433 | TARGET_CHAR_BIT * offset, | |
434 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
435 | { |
436 | struct value *value; | |
437 | int full, top, using_enc; | |
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 | ||
452 | cp_print_value_fields (type, real_type, valaddr, 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, |
aff410f1 MS |
462 | const gdb_byte *valaddr, int offset, |
463 | CORE_ADDR address, struct ui_file *stream, | |
464 | int recurse, const 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); |
b9d652ac DJ |
472 | int thisoffset; |
473 | struct type *thistype; | |
c906108c SS |
474 | |
475 | if (dont_print_vb == 0) | |
476 | { | |
aff410f1 MS |
477 | /* If we're at top level, carve out a completely fresh chunk of |
478 | the obstack and use that until this particular invocation | |
479 | returns. */ | |
c906108c SS |
480 | /* Bump up the high-water mark. Now alpha is omega. */ |
481 | obstack_finish (&dont_print_vb_obstack); | |
482 | } | |
483 | ||
484 | for (i = 0; i < n_baseclasses; i++) | |
485 | { | |
8af8e3bc | 486 | int boffset = 0; |
7556d4a4 | 487 | int skip = 0; |
c906108c | 488 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 489 | const char *basename = TYPE_NAME (baseclass); |
8af8e3bc PA |
490 | const gdb_byte *base_valaddr = NULL; |
491 | const 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 | |
492d29ea | 511 | TRY |
c5aa993b | 512 | { |
8af8e3bc PA |
513 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
514 | } | |
492d29ea | 515 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
516 | { |
517 | if (ex.error == NOT_AVAILABLE_ERROR) | |
518 | skip = -1; | |
519 | else | |
520 | skip = 1; | |
521 | } | |
492d29ea | 522 | END_CATCH |
c906108c | 523 | |
7556d4a4 PA |
524 | if (skip == 0) |
525 | { | |
8af8e3bc | 526 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 527 | { |
8af8e3bc PA |
528 | /* The virtual base class pointer might have been |
529 | clobbered by the user program. Make sure that it | |
530 | still points to a valid memory location. */ | |
531 | ||
532 | if ((boffset + offset) < 0 | |
533 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
534 | { | |
d5161074 SP |
535 | gdb_byte *buf; |
536 | struct cleanup *back_to; | |
537 | ||
538 | buf = xmalloc (TYPE_LENGTH (baseclass)); | |
539 | back_to = make_cleanup (xfree, buf); | |
8af8e3bc PA |
540 | |
541 | if (target_read_memory (address + boffset, buf, | |
542 | TYPE_LENGTH (baseclass)) != 0) | |
543 | skip = 1; | |
544 | base_val = value_from_contents_and_address (baseclass, | |
545 | buf, | |
546 | address + boffset); | |
9f1f738a | 547 | baseclass = value_type (base_val); |
8af8e3bc PA |
548 | thisoffset = 0; |
549 | boffset = 0; | |
550 | thistype = baseclass; | |
551 | base_valaddr = value_contents_for_printing_const (base_val); | |
d5161074 | 552 | do_cleanups (back_to); |
8af8e3bc PA |
553 | } |
554 | else | |
555 | { | |
556 | base_valaddr = valaddr; | |
557 | base_val = val; | |
558 | } | |
c5aa993b JM |
559 | } |
560 | else | |
de4127a3 PA |
561 | { |
562 | base_valaddr = valaddr; | |
563 | base_val = val; | |
564 | } | |
c906108c SS |
565 | } |
566 | ||
aff410f1 | 567 | /* Now do the printing. */ |
2a998fc0 | 568 | if (options->prettyformat) |
c906108c SS |
569 | { |
570 | fprintf_filtered (stream, "\n"); | |
571 | print_spaces_filtered (2 * recurse, stream); | |
572 | } | |
573 | fputs_filtered ("<", stream); | |
aff410f1 MS |
574 | /* Not sure what the best notation is in the case where there is |
575 | no baseclass name. */ | |
c906108c SS |
576 | fputs_filtered (basename ? basename : "", stream); |
577 | fputs_filtered ("> = ", stream); | |
578 | ||
8af8e3bc PA |
579 | if (skip < 0) |
580 | val_print_unavailable (stream); | |
581 | else if (skip > 0) | |
582 | val_print_invalid_address (stream); | |
c906108c | 583 | else |
a6bac58e TT |
584 | { |
585 | int result = 0; | |
586 | ||
6dddc817 | 587 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
588 | baseclass if possible. */ |
589 | if (!options->raw) | |
6dddc817 DE |
590 | result |
591 | = apply_ext_lang_val_pretty_printer (baseclass, base_valaddr, | |
592 | thisoffset + boffset, | |
593 | value_address (base_val), | |
594 | stream, recurse, | |
595 | base_val, options, | |
596 | current_language); | |
de4127a3 | 597 | |
a6bac58e TT |
598 | if (!result) |
599 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
600 | thisoffset + boffset, |
601 | value_address (base_val), | |
602 | stream, recurse, base_val, options, | |
a6bac58e TT |
603 | ((struct type **) |
604 | obstack_base (&dont_print_vb_obstack)), | |
605 | 0); | |
606 | } | |
c906108c SS |
607 | fputs_filtered (", ", stream); |
608 | ||
609 | flush_it: | |
610 | ; | |
611 | } | |
612 | ||
613 | if (dont_print_vb == 0) | |
614 | { | |
615 | /* Free the space used to deal with the printing | |
c5aa993b | 616 | of this type from top level. */ |
c906108c SS |
617 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
618 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 619 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
620 | dont_print_vb_obstack = tmp_obstack; |
621 | } | |
622 | } | |
623 | ||
aff410f1 MS |
624 | /* Print value of a static member. To avoid infinite recursion when |
625 | printing a class that contains a static instance of the class, we | |
626 | keep the addresses of all printed static member classes in an | |
627 | obstack and refuse to print them more than once. | |
c906108c | 628 | |
79a45b7d | 629 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
630 | have the same meanings as in c_val_print. */ |
631 | ||
632 | static void | |
2c63a960 | 633 | cp_print_static_field (struct type *type, |
6943961c | 634 | struct value *val, |
2c63a960 | 635 | struct ui_file *stream, |
2c63a960 | 636 | int recurse, |
79a45b7d | 637 | const struct value_print_options *options) |
c906108c | 638 | { |
79a45b7d | 639 | struct value_print_options opts; |
686d4def PA |
640 | |
641 | if (value_entirely_optimized_out (val)) | |
642 | { | |
643 | val_print_optimized_out (val, stream); | |
644 | return; | |
645 | } | |
646 | ||
c906108c SS |
647 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
648 | { | |
649 | CORE_ADDR *first_dont_print; | |
42ae5230 | 650 | CORE_ADDR addr; |
c906108c SS |
651 | int i; |
652 | ||
653 | first_dont_print | |
c5aa993b | 654 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
655 | i = obstack_object_size (&dont_print_statmem_obstack) |
656 | / sizeof (CORE_ADDR); | |
c906108c SS |
657 | |
658 | while (--i >= 0) | |
659 | { | |
42ae5230 | 660 | if (value_address (val) == first_dont_print[i]) |
c906108c | 661 | { |
2c63a960 JB |
662 | fputs_filtered ("<same as static member of an already" |
663 | " seen type>", | |
c906108c SS |
664 | stream); |
665 | return; | |
666 | } | |
667 | } | |
668 | ||
42ae5230 TT |
669 | addr = value_address (val); |
670 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 671 | sizeof (CORE_ADDR)); |
f168693b | 672 | type = check_typedef (type); |
edf3d5f3 | 673 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 674 | value_contents_for_printing (val), |
42ae5230 | 675 | value_embedded_offset (val), addr, |
aff410f1 MS |
676 | stream, recurse, val, |
677 | options, NULL, 1); | |
c906108c SS |
678 | return; |
679 | } | |
79a45b7d | 680 | |
ec31cde5 CM |
681 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
682 | { | |
683 | struct type **first_dont_print; | |
684 | int i; | |
685 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
686 | ||
687 | first_dont_print | |
688 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
689 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 690 | / sizeof (struct type *); |
ec31cde5 CM |
691 | |
692 | while (--i >= 0) | |
693 | { | |
694 | if (target_type == first_dont_print[i]) | |
695 | { | |
696 | fputs_filtered ("<same as static member of an already" | |
697 | " seen type>", | |
698 | stream); | |
699 | return; | |
700 | } | |
701 | } | |
702 | ||
aff410f1 MS |
703 | obstack_grow (&dont_print_stat_array_obstack, |
704 | (char *) &target_type, | |
ec31cde5 CM |
705 | sizeof (struct type *)); |
706 | } | |
707 | ||
79a45b7d TT |
708 | opts = *options; |
709 | opts.deref_ref = 0; | |
0e03807e | 710 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
711 | value_embedded_offset (val), |
712 | value_address (val), | |
713 | stream, recurse, val, | |
714 | &opts, current_language); | |
c906108c SS |
715 | } |
716 | ||
09e2d7c7 DE |
717 | /* Find the field in *SELF, or its non-virtual base classes, with |
718 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 719 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 720 | start of some field, set *SELF to NULL. */ |
0d5de010 | 721 | |
2c0b251b | 722 | static void |
09e2d7c7 | 723 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
724 | LONGEST offset) |
725 | { | |
09e2d7c7 | 726 | struct type *self; |
0d5de010 DJ |
727 | unsigned int i; |
728 | unsigned len; | |
729 | ||
09e2d7c7 DE |
730 | *self_p = check_typedef (*self_p); |
731 | self = *self_p; | |
732 | len = TYPE_NFIELDS (self); | |
0d5de010 | 733 | |
09e2d7c7 | 734 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 735 | { |
09e2d7c7 | 736 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
737 | |
738 | QUIT; | |
739 | if (offset == bitpos) | |
740 | { | |
741 | *fieldno = i; | |
742 | return; | |
743 | } | |
744 | } | |
745 | ||
09e2d7c7 | 746 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 747 | { |
09e2d7c7 DE |
748 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
749 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
750 | |
751 | if (offset >= bitpos && offset < bitpos + bitsize) | |
752 | { | |
09e2d7c7 DE |
753 | *self_p = TYPE_FIELD_TYPE (self, i); |
754 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
755 | return; |
756 | } | |
757 | } | |
758 | ||
09e2d7c7 | 759 | *self_p = NULL; |
0d5de010 DJ |
760 | } |
761 | ||
c906108c | 762 | void |
ad4820ab | 763 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 764 | struct ui_file *stream, char *prefix) |
c906108c | 765 | { |
e17a4113 UW |
766 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
767 | ||
09e2d7c7 | 768 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
769 | Find the name of the field for that offset and |
770 | print it. */ | |
09e2d7c7 | 771 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 772 | LONGEST val; |
9f8afa72 | 773 | int fieldno; |
c906108c | 774 | |
aff410f1 MS |
775 | val = extract_signed_integer (valaddr, |
776 | TYPE_LENGTH (type), | |
777 | byte_order); | |
e17a4113 | 778 | |
0d5de010 DJ |
779 | /* Pointers to data members are usually byte offsets into an object. |
780 | Because a data member can have offset zero, and a NULL pointer to | |
781 | member must be distinct from any valid non-NULL pointer to | |
782 | member, either the value is biased or the NULL value has a | |
783 | special representation; both are permitted by ISO C++. HP aCC | |
784 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
785 | and other compilers which use the Itanium ABI use -1 as the NULL | |
786 | value. GDB only supports that last form; to add support for | |
787 | another form, make this into a cp-abi hook. */ | |
c906108c | 788 | |
0d5de010 | 789 | if (val == -1) |
c906108c | 790 | { |
0d5de010 DJ |
791 | fprintf_filtered (stream, "NULL"); |
792 | return; | |
c906108c | 793 | } |
0d5de010 | 794 | |
09e2d7c7 | 795 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 796 | |
09e2d7c7 | 797 | if (self_type != NULL) |
c906108c | 798 | { |
0d5cff50 | 799 | const char *name; |
c5504eaf | 800 | |
306d9ac5 | 801 | fputs_filtered (prefix, stream); |
09e2d7c7 | 802 | name = type_name_no_tag (self_type); |
c906108c | 803 | if (name) |
c5aa993b | 804 | fputs_filtered (name, stream); |
c906108c | 805 | else |
09e2d7c7 | 806 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 807 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 808 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
809 | } |
810 | else | |
0d5de010 | 811 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
812 | } |
813 | ||
814 | ||
c906108c | 815 | void |
fba45db2 | 816 | _initialize_cp_valprint (void) |
c906108c | 817 | { |
5bf193a2 | 818 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 819 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
820 | Set printing of C++ static members."), _("\ |
821 | Show printing of C++ static members."), NULL, | |
822 | NULL, | |
920d2a44 | 823 | show_static_field_print, |
5bf193a2 | 824 | &setprintlist, &showprintlist); |
c906108c | 825 | |
79a45b7d TT |
826 | add_setshow_boolean_cmd ("vtbl", class_support, |
827 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
828 | Set printing of C++ virtual function tables."), _("\ |
829 | Show printing of C++ virtual function tables."), NULL, | |
830 | NULL, | |
920d2a44 | 831 | show_vtblprint, |
5bf193a2 AC |
832 | &setprintlist, &showprintlist); |
833 | ||
79a45b7d TT |
834 | add_setshow_boolean_cmd ("object", class_support, |
835 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
836 | Set printing of object's derived type based on vtable info."), _("\ |
837 | Show printing of object's derived type based on vtable info."), NULL, | |
838 | NULL, | |
920d2a44 | 839 | show_objectprint, |
5bf193a2 | 840 | &setprintlist, &showprintlist); |
c906108c | 841 | |
aff410f1 MS |
842 | obstack_begin (&dont_print_stat_array_obstack, |
843 | 32 * sizeof (struct type *)); | |
844 | obstack_begin (&dont_print_statmem_obstack, | |
845 | 32 * sizeof (CORE_ADDR)); | |
846 | obstack_begin (&dont_print_vb_obstack, | |
847 | 32 * sizeof (struct type *)); | |
c906108c | 848 | } |