]>
Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
0b302171 JB |
3 | Copyright (C) 1986, 1988-1989, 1991-1997, 2000-2003, 2005-2012 Free |
4 | Software Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "defs.h" | |
04ea0df1 | 22 | #include "gdb_obstack.h" |
c906108c SS |
23 | #include "symtab.h" |
24 | #include "gdbtypes.h" | |
25 | #include "expression.h" | |
26 | #include "value.h" | |
27 | #include "command.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "demangle.h" | |
30 | #include "annotate.h" | |
31 | #include "gdb_string.h" | |
32 | #include "c-lang.h" | |
33 | #include "target.h" | |
b9d652ac | 34 | #include "cp-abi.h" |
973177d3 | 35 | #include "valprint.h" |
d3cbe7ef | 36 | #include "cp-support.h" |
cf309262 | 37 | #include "language.h" |
a6bac58e | 38 | #include "python/python.h" |
8af8e3bc | 39 | #include "exceptions.h" |
c906108c | 40 | |
aff410f1 | 41 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
42 | static void |
43 | show_vtblprint (struct ui_file *file, int from_tty, | |
44 | struct cmd_list_element *c, const char *value) | |
45 | { | |
46 | fprintf_filtered (file, _("\ | |
47 | Printing of C++ virtual function tables is %s.\n"), | |
48 | value); | |
49 | } | |
50 | ||
51 | /* Controls looking up an object's derived type using what we find in | |
52 | its vtables. */ | |
920d2a44 AC |
53 | static void |
54 | show_objectprint (struct ui_file *file, int from_tty, | |
55 | struct cmd_list_element *c, | |
56 | const char *value) | |
57 | { | |
58 | fprintf_filtered (file, _("\ | |
59 | Printing of object's derived type based on vtable info is %s.\n"), | |
60 | value); | |
61 | } | |
62 | ||
920d2a44 AC |
63 | static void |
64 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
65 | struct cmd_list_element *c, |
66 | const char *value) | |
920d2a44 | 67 | { |
aff410f1 MS |
68 | fprintf_filtered (file, |
69 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
70 | value); |
71 | } | |
72 | ||
c906108c SS |
73 | |
74 | static struct obstack dont_print_vb_obstack; | |
75 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 76 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 77 | |
a14ed312 | 78 | extern void _initialize_cp_valprint (void); |
392a587b | 79 | |
6943961c | 80 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
81 | struct ui_file *, int, |
82 | const struct value_print_options *); | |
c906108c | 83 | |
aff410f1 MS |
84 | static void cp_print_value (struct type *, struct type *, |
85 | const gdb_byte *, int, | |
86 | CORE_ADDR, struct ui_file *, | |
87 | int, const struct value *, | |
88 | const struct value_print_options *, | |
89 | struct type **); | |
c906108c | 90 | |
c906108c | 91 | |
8343f86c | 92 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 93 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 94 | |
c906108c SS |
95 | /* Return truth value for assertion that TYPE is of the type |
96 | "pointer to virtual function". */ | |
97 | ||
98 | int | |
fba45db2 | 99 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 100 | { |
0d5cff50 | 101 | const char *typename = type_name_no_tag (type); |
c906108c | 102 | |
8343f86c | 103 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
104 | } |
105 | ||
106 | /* Return truth value for the assertion that TYPE is of the type | |
107 | "pointer to virtual function table". */ | |
108 | ||
109 | int | |
fba45db2 | 110 | cp_is_vtbl_member (struct type *type) |
c906108c | 111 | { |
aff410f1 MS |
112 | /* With older versions of g++, the vtbl field pointed to an array of |
113 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
114 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
115 | { | |
116 | type = TYPE_TARGET_TYPE (type); | |
117 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
118 | { | |
119 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
120 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
121 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
122 | { |
123 | /* Virtual functions tables are full of pointers | |
aff410f1 | 124 | to virtual functions. */ |
c906108c SS |
125 | return cp_is_vtbl_ptr_type (type); |
126 | } | |
127 | } | |
0e5e3ea6 PS |
128 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
129 | { | |
130 | return cp_is_vtbl_ptr_type (type); | |
131 | } | |
132 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
133 | { | |
aff410f1 MS |
134 | /* The type name of the thunk pointer is NULL when using |
135 | dwarf2. We could test for a pointer to a function, but | |
136 | there is no type info for the virtual table either, so it | |
137 | wont help. */ | |
0e5e3ea6 PS |
138 | return cp_is_vtbl_ptr_type (type); |
139 | } | |
c906108c SS |
140 | } |
141 | return 0; | |
142 | } | |
143 | ||
144 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
145 | print out a structure's fields: cp_print_value_fields and |
146 | cp_print_value. | |
c5aa993b | 147 | |
aff410f1 MS |
148 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
149 | meanings as in cp_print_value and c_val_print. | |
c906108c | 150 | |
aff410f1 MS |
151 | 2nd argument REAL_TYPE is used to carry over the type of the |
152 | derived class across the recursion to base classes. | |
c906108c | 153 | |
aff410f1 MS |
154 | DONT_PRINT is an array of baseclass types that we should not print, |
155 | or zero if called from top level. */ | |
c906108c SS |
156 | |
157 | void | |
a2bd3dcd | 158 | cp_print_value_fields (struct type *type, struct type *real_type, |
aff410f1 MS |
159 | const gdb_byte *valaddr, int offset, |
160 | CORE_ADDR address, struct ui_file *stream, | |
161 | int recurse, const struct value *val, | |
79a45b7d | 162 | const struct value_print_options *options, |
aff410f1 MS |
163 | struct type **dont_print_vb, |
164 | int dont_print_statmem) | |
c906108c SS |
165 | { |
166 | int i, len, n_baseclasses; | |
c906108c | 167 | int fields_seen = 0; |
ec31cde5 | 168 | static int last_set_recurse = -1; |
c906108c SS |
169 | |
170 | CHECK_TYPEDEF (type); | |
99903ae3 | 171 | |
ec31cde5 CM |
172 | if (recurse == 0) |
173 | { | |
aff410f1 MS |
174 | /* Any object can be left on obstacks only during an unexpected |
175 | error. */ | |
6036c742 | 176 | |
ec31cde5 | 177 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
178 | { |
179 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
180 | obstack_begin (&dont_print_statmem_obstack, |
181 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 182 | } |
ec31cde5 | 183 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
184 | { |
185 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
186 | obstack_begin (&dont_print_stat_array_obstack, | |
187 | 32 * sizeof (struct type *)); | |
188 | } | |
ec31cde5 | 189 | } |
c906108c SS |
190 | |
191 | fprintf_filtered (stream, "{"); | |
192 | len = TYPE_NFIELDS (type); | |
193 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
194 | ||
195 | /* First, print out baseclasses such that we don't print | |
196 | duplicates of virtual baseclasses. */ | |
197 | ||
198 | if (n_baseclasses > 0) | |
aff410f1 MS |
199 | cp_print_value (type, real_type, valaddr, |
200 | offset, address, stream, | |
201 | recurse + 1, val, options, | |
202 | dont_print_vb); | |
c906108c SS |
203 | |
204 | /* Second, print out data fields */ | |
205 | ||
086280be UW |
206 | /* If there are no data fields, skip this part */ |
207 | if (len == n_baseclasses || !len) | |
c906108c SS |
208 | fprintf_filtered (stream, "<No data fields>"); |
209 | else | |
210 | { | |
f56dcb88 CM |
211 | int statmem_obstack_initial_size = 0; |
212 | int stat_array_obstack_initial_size = 0; | |
99903ae3 | 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 | ||
228 | for (i = n_baseclasses; i < len; i++) | |
229 | { | |
230 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 231 | if (!options->static_field_print |
d6a843b5 | 232 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
233 | continue; |
234 | ||
c906108c SS |
235 | if (fields_seen) |
236 | fprintf_filtered (stream, ", "); | |
237 | else if (n_baseclasses > 0) | |
238 | { | |
79a45b7d | 239 | if (options->pretty) |
c906108c SS |
240 | { |
241 | fprintf_filtered (stream, "\n"); | |
242 | print_spaces_filtered (2 + 2 * recurse, stream); | |
243 | fputs_filtered ("members of ", stream); | |
244 | fputs_filtered (type_name_no_tag (type), stream); | |
245 | fputs_filtered (": ", stream); | |
246 | } | |
247 | } | |
248 | fields_seen = 1; | |
249 | ||
79a45b7d | 250 | if (options->pretty) |
c906108c SS |
251 | { |
252 | fprintf_filtered (stream, "\n"); | |
253 | print_spaces_filtered (2 + 2 * recurse, stream); | |
254 | } | |
c5aa993b | 255 | else |
c906108c SS |
256 | { |
257 | wrap_here (n_spaces (2 + 2 * recurse)); | |
258 | } | |
79a45b7d | 259 | if (options->inspect_it) |
c906108c SS |
260 | { |
261 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) | |
262 | fputs_filtered ("\"( ptr \"", stream); | |
263 | else | |
264 | fputs_filtered ("\"( nodef \"", stream); | |
d6a843b5 | 265 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 266 | fputs_filtered ("static ", stream); |
aff410f1 MS |
267 | fprintf_symbol_filtered (stream, |
268 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 269 | current_language->la_language, |
c906108c SS |
270 | DMGL_PARAMS | DMGL_ANSI); |
271 | fputs_filtered ("\" \"", stream); | |
aff410f1 MS |
272 | fprintf_symbol_filtered (stream, |
273 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 274 | current_language->la_language, |
c906108c SS |
275 | DMGL_PARAMS | DMGL_ANSI); |
276 | fputs_filtered ("\") \"", stream); | |
277 | } | |
278 | else | |
279 | { | |
280 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
281 | ||
d6a843b5 | 282 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 283 | fputs_filtered ("static ", stream); |
aff410f1 MS |
284 | fprintf_symbol_filtered (stream, |
285 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 286 | current_language->la_language, |
c906108c SS |
287 | DMGL_PARAMS | DMGL_ANSI); |
288 | annotate_field_name_end (); | |
aff410f1 MS |
289 | /* Do not print leading '=' in case of anonymous |
290 | unions. */ | |
c906108c SS |
291 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) |
292 | fputs_filtered (" = ", stream); | |
293 | annotate_field_value (); | |
294 | } | |
295 | ||
d6a843b5 JK |
296 | if (!field_is_static (&TYPE_FIELD (type, i)) |
297 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 298 | { |
6943961c | 299 | struct value *v; |
c906108c | 300 | |
aff410f1 MS |
301 | /* Bitfields require special handling, especially due to |
302 | byte order problems. */ | |
c906108c SS |
303 | if (TYPE_FIELD_IGNORE (type, i)) |
304 | { | |
c5aa993b | 305 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 306 | } |
8cf6f0b1 TT |
307 | else if (value_bits_synthetic_pointer (val, |
308 | TYPE_FIELD_BITPOS (type, | |
309 | i), | |
310 | TYPE_FIELD_BITSIZE (type, | |
311 | i))) | |
312 | { | |
313 | fputs_filtered (_("<synthetic pointer>"), stream); | |
314 | } | |
aff410f1 MS |
315 | else if (!value_bits_valid (val, |
316 | TYPE_FIELD_BITPOS (type, i), | |
0e03807e TT |
317 | TYPE_FIELD_BITSIZE (type, i))) |
318 | { | |
585fdaa1 | 319 | val_print_optimized_out (stream); |
0e03807e | 320 | } |
c906108c SS |
321 | else |
322 | { | |
79a45b7d | 323 | struct value_print_options opts = *options; |
c5504eaf | 324 | |
79a45b7d | 325 | opts.deref_ref = 0; |
5467c6c8 PA |
326 | |
327 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 328 | |
79a45b7d | 329 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 330 | current_language); |
c906108c SS |
331 | } |
332 | } | |
333 | else | |
334 | { | |
335 | if (TYPE_FIELD_IGNORE (type, i)) | |
336 | { | |
aff410f1 MS |
337 | fputs_filtered ("<optimized out or zero length>", |
338 | stream); | |
c906108c | 339 | } |
d6a843b5 | 340 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 341 | { |
ee86786c TT |
342 | volatile struct gdb_exception ex; |
343 | struct value *v = NULL; | |
344 | ||
345 | TRY_CATCH (ex, RETURN_MASK_ERROR) | |
346 | { | |
347 | v = value_static_field (type, i); | |
348 | } | |
349 | ||
350 | if (ex.reason < 0) | |
351 | fprintf_filtered (stream, | |
352 | _("<error reading variable: %s>"), | |
353 | ex.message); | |
354 | else if (v == NULL) | |
585fdaa1 | 355 | val_print_optimized_out (stream); |
c906108c | 356 | else |
aff410f1 MS |
357 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
358 | v, stream, recurse + 1, | |
359 | options); | |
c906108c | 360 | } |
410528f0 TT |
361 | else if (i == TYPE_VPTR_FIELDNO (type)) |
362 | { | |
a72c8f6a JK |
363 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
364 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
365 | ||
366 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
367 | { | |
368 | CORE_ADDR addr; | |
369 | ||
370 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
371 | print_function_pointer_address (options, |
372 | get_type_arch (type), | |
373 | addr, stream); | |
a72c8f6a | 374 | } |
410528f0 | 375 | } |
c906108c SS |
376 | else |
377 | { | |
79a45b7d | 378 | struct value_print_options opts = *options; |
c5504eaf | 379 | |
79a45b7d | 380 | opts.deref_ref = 0; |
c5aa993b | 381 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
382 | valaddr, |
383 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 384 | address, |
0e03807e | 385 | stream, recurse + 1, val, &opts, |
d8ca156b | 386 | current_language); |
c906108c SS |
387 | } |
388 | } | |
389 | annotate_field_end (); | |
390 | } | |
391 | ||
392 | if (dont_print_statmem == 0) | |
393 | { | |
0b66f317 CM |
394 | int obstack_final_size = |
395 | obstack_object_size (&dont_print_statmem_obstack); | |
396 | ||
aff410f1 MS |
397 | if (obstack_final_size > statmem_obstack_initial_size) |
398 | { | |
399 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 400 | |
aff410f1 MS |
401 | void *free_to_ptr = |
402 | obstack_next_free (&dont_print_statmem_obstack) - | |
403 | (obstack_final_size - statmem_obstack_initial_size); | |
0b66f317 | 404 | |
aff410f1 MS |
405 | obstack_free (&dont_print_statmem_obstack, |
406 | free_to_ptr); | |
407 | } | |
ec31cde5 CM |
408 | |
409 | if (last_set_recurse != recurse) | |
410 | { | |
f56dcb88 CM |
411 | int obstack_final_size = |
412 | obstack_object_size (&dont_print_stat_array_obstack); | |
413 | ||
414 | if (obstack_final_size > stat_array_obstack_initial_size) | |
415 | { | |
416 | void *free_to_ptr = | |
aff410f1 MS |
417 | obstack_next_free (&dont_print_stat_array_obstack) |
418 | - (obstack_final_size | |
419 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
420 | |
421 | obstack_free (&dont_print_stat_array_obstack, | |
422 | free_to_ptr); | |
423 | } | |
ec31cde5 CM |
424 | last_set_recurse = -1; |
425 | } | |
c906108c SS |
426 | } |
427 | ||
79a45b7d | 428 | if (options->pretty) |
c906108c SS |
429 | { |
430 | fprintf_filtered (stream, "\n"); | |
431 | print_spaces_filtered (2 * recurse, stream); | |
432 | } | |
c5aa993b | 433 | } /* if there are data fields */ |
c5aa993b | 434 | |
c906108c SS |
435 | fprintf_filtered (stream, "}"); |
436 | } | |
437 | ||
edf3d5f3 TT |
438 | /* Like cp_print_value_fields, but find the runtime type of the object |
439 | and pass it as the `real_type' argument to cp_print_value_fields. | |
440 | This function is a hack to work around the fact that | |
441 | common_val_print passes the embedded offset to val_print, but not | |
442 | the enclosing type. */ | |
443 | ||
444 | void | |
445 | cp_print_value_fields_rtti (struct type *type, | |
446 | const gdb_byte *valaddr, int offset, | |
447 | CORE_ADDR address, | |
448 | struct ui_file *stream, int recurse, | |
0e03807e | 449 | const struct value *val, |
edf3d5f3 | 450 | const struct value_print_options *options, |
c5504eaf MS |
451 | struct type **dont_print_vb, |
452 | int dont_print_statmem) | |
edf3d5f3 | 453 | { |
0e03807e TT |
454 | struct type *real_type = NULL; |
455 | ||
456 | /* We require all bits to be valid in order to attempt a | |
457 | conversion. */ | |
458 | if (value_bits_valid (val, TARGET_CHAR_BIT * offset, | |
459 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
460 | { | |
461 | struct value *value; | |
462 | int full, top, using_enc; | |
463 | ||
464 | /* Ugh, we have to convert back to a value here. */ | |
465 | value = value_from_contents_and_address (type, valaddr + offset, | |
466 | address + offset); | |
aff410f1 MS |
467 | /* We don't actually care about most of the result here -- just |
468 | the type. We already have the correct offset, due to how | |
469 | val_print was initially called. */ | |
0e03807e TT |
470 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
471 | } | |
472 | ||
edf3d5f3 TT |
473 | if (!real_type) |
474 | real_type = type; | |
475 | ||
476 | cp_print_value_fields (type, real_type, valaddr, offset, | |
0e03807e | 477 | address, stream, recurse, val, options, |
edf3d5f3 TT |
478 | dont_print_vb, dont_print_statmem); |
479 | } | |
480 | ||
aff410f1 MS |
481 | /* Special val_print routine to avoid printing multiple copies of |
482 | virtual baseclasses. */ | |
c906108c SS |
483 | |
484 | static void | |
a2bd3dcd | 485 | cp_print_value (struct type *type, struct type *real_type, |
aff410f1 MS |
486 | const gdb_byte *valaddr, int offset, |
487 | CORE_ADDR address, struct ui_file *stream, | |
488 | int recurse, const struct value *val, | |
79a45b7d TT |
489 | const struct value_print_options *options, |
490 | struct type **dont_print_vb) | |
c906108c | 491 | { |
c906108c | 492 | struct type **last_dont_print |
2c63a960 | 493 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 494 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 495 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
496 | int thisoffset; |
497 | struct type *thistype; | |
c906108c SS |
498 | |
499 | if (dont_print_vb == 0) | |
500 | { | |
aff410f1 MS |
501 | /* If we're at top level, carve out a completely fresh chunk of |
502 | the obstack and use that until this particular invocation | |
503 | returns. */ | |
c906108c SS |
504 | /* Bump up the high-water mark. Now alpha is omega. */ |
505 | obstack_finish (&dont_print_vb_obstack); | |
506 | } | |
507 | ||
508 | for (i = 0; i < n_baseclasses; i++) | |
509 | { | |
8af8e3bc | 510 | int boffset = 0; |
c906108c SS |
511 | int skip; |
512 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
0d5cff50 | 513 | const char *basename = TYPE_NAME (baseclass); |
8af8e3bc PA |
514 | const gdb_byte *base_valaddr = NULL; |
515 | const struct value *base_val = NULL; | |
516 | volatile struct gdb_exception ex; | |
c906108c SS |
517 | |
518 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
519 | { | |
520 | struct type **first_dont_print | |
2c63a960 | 521 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 522 | |
aff410f1 MS |
523 | int j = (struct type **) |
524 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
525 | |
526 | while (--j >= 0) | |
527 | if (baseclass == first_dont_print[j]) | |
528 | goto flush_it; | |
529 | ||
530 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
531 | } | |
532 | ||
b9d652ac DJ |
533 | thisoffset = offset; |
534 | thistype = real_type; | |
086280be | 535 | |
8af8e3bc | 536 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
c5aa993b | 537 | { |
8af8e3bc PA |
538 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
539 | } | |
540 | if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR) | |
541 | skip = -1; | |
542 | else if (ex.reason < 0) | |
543 | skip = 1; | |
544 | else | |
545 | { | |
546 | skip = 0; | |
c906108c | 547 | |
8af8e3bc | 548 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 549 | { |
8af8e3bc PA |
550 | /* The virtual base class pointer might have been |
551 | clobbered by the user program. Make sure that it | |
552 | still points to a valid memory location. */ | |
553 | ||
554 | if ((boffset + offset) < 0 | |
555 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
556 | { | |
557 | /* FIXME (alloca): unsafe if baseclass is really | |
558 | really large. */ | |
559 | gdb_byte *buf = alloca (TYPE_LENGTH (baseclass)); | |
560 | ||
561 | if (target_read_memory (address + boffset, buf, | |
562 | TYPE_LENGTH (baseclass)) != 0) | |
563 | skip = 1; | |
564 | base_val = value_from_contents_and_address (baseclass, | |
565 | buf, | |
566 | address + boffset); | |
567 | thisoffset = 0; | |
568 | boffset = 0; | |
569 | thistype = baseclass; | |
570 | base_valaddr = value_contents_for_printing_const (base_val); | |
571 | } | |
572 | else | |
573 | { | |
574 | base_valaddr = valaddr; | |
575 | base_val = val; | |
576 | } | |
c5aa993b JM |
577 | } |
578 | else | |
de4127a3 PA |
579 | { |
580 | base_valaddr = valaddr; | |
581 | base_val = val; | |
582 | } | |
c906108c SS |
583 | } |
584 | ||
aff410f1 | 585 | /* Now do the printing. */ |
79a45b7d | 586 | if (options->pretty) |
c906108c SS |
587 | { |
588 | fprintf_filtered (stream, "\n"); | |
589 | print_spaces_filtered (2 * recurse, stream); | |
590 | } | |
591 | fputs_filtered ("<", stream); | |
aff410f1 MS |
592 | /* Not sure what the best notation is in the case where there is |
593 | no baseclass name. */ | |
c906108c SS |
594 | fputs_filtered (basename ? basename : "", stream); |
595 | fputs_filtered ("> = ", stream); | |
596 | ||
8af8e3bc PA |
597 | if (skip < 0) |
598 | val_print_unavailable (stream); | |
599 | else if (skip > 0) | |
600 | val_print_invalid_address (stream); | |
c906108c | 601 | else |
a6bac58e TT |
602 | { |
603 | int result = 0; | |
604 | ||
605 | /* Attempt to run the Python pretty-printers on the | |
606 | baseclass if possible. */ | |
607 | if (!options->raw) | |
608 | result = apply_val_pretty_printer (baseclass, base_valaddr, | |
609 | thisoffset + boffset, | |
de4127a3 PA |
610 | value_address (base_val), |
611 | stream, recurse, base_val, | |
612 | options, current_language); | |
613 | ||
614 | ||
a6bac58e TT |
615 | |
616 | if (!result) | |
617 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
618 | thisoffset + boffset, |
619 | value_address (base_val), | |
620 | stream, recurse, base_val, options, | |
a6bac58e TT |
621 | ((struct type **) |
622 | obstack_base (&dont_print_vb_obstack)), | |
623 | 0); | |
624 | } | |
c906108c SS |
625 | fputs_filtered (", ", stream); |
626 | ||
627 | flush_it: | |
628 | ; | |
629 | } | |
630 | ||
631 | if (dont_print_vb == 0) | |
632 | { | |
633 | /* Free the space used to deal with the printing | |
c5aa993b | 634 | of this type from top level. */ |
c906108c SS |
635 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
636 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 637 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
638 | dont_print_vb_obstack = tmp_obstack; |
639 | } | |
640 | } | |
641 | ||
aff410f1 MS |
642 | /* Print value of a static member. To avoid infinite recursion when |
643 | printing a class that contains a static instance of the class, we | |
644 | keep the addresses of all printed static member classes in an | |
645 | obstack and refuse to print them more than once. | |
c906108c | 646 | |
79a45b7d | 647 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
648 | have the same meanings as in c_val_print. */ |
649 | ||
650 | static void | |
2c63a960 | 651 | cp_print_static_field (struct type *type, |
6943961c | 652 | struct value *val, |
2c63a960 | 653 | struct ui_file *stream, |
2c63a960 | 654 | int recurse, |
79a45b7d | 655 | const struct value_print_options *options) |
c906108c | 656 | { |
79a45b7d | 657 | struct value_print_options opts; |
ec31cde5 | 658 | |
c906108c SS |
659 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
660 | { | |
661 | CORE_ADDR *first_dont_print; | |
42ae5230 | 662 | CORE_ADDR addr; |
c906108c SS |
663 | int i; |
664 | ||
665 | first_dont_print | |
c5aa993b | 666 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
667 | i = obstack_object_size (&dont_print_statmem_obstack) |
668 | / sizeof (CORE_ADDR); | |
c906108c SS |
669 | |
670 | while (--i >= 0) | |
671 | { | |
42ae5230 | 672 | if (value_address (val) == first_dont_print[i]) |
c906108c | 673 | { |
2c63a960 JB |
674 | fputs_filtered ("<same as static member of an already" |
675 | " seen type>", | |
c906108c SS |
676 | stream); |
677 | return; | |
678 | } | |
679 | } | |
680 | ||
42ae5230 TT |
681 | addr = value_address (val); |
682 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 683 | sizeof (CORE_ADDR)); |
c906108c | 684 | CHECK_TYPEDEF (type); |
edf3d5f3 | 685 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 686 | value_contents_for_printing (val), |
42ae5230 | 687 | value_embedded_offset (val), addr, |
aff410f1 MS |
688 | stream, recurse, val, |
689 | options, NULL, 1); | |
c906108c SS |
690 | return; |
691 | } | |
79a45b7d | 692 | |
ec31cde5 CM |
693 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
694 | { | |
695 | struct type **first_dont_print; | |
696 | int i; | |
697 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
698 | ||
699 | first_dont_print | |
700 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
701 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 702 | / sizeof (struct type *); |
ec31cde5 CM |
703 | |
704 | while (--i >= 0) | |
705 | { | |
706 | if (target_type == first_dont_print[i]) | |
707 | { | |
708 | fputs_filtered ("<same as static member of an already" | |
709 | " seen type>", | |
710 | stream); | |
711 | return; | |
712 | } | |
713 | } | |
714 | ||
aff410f1 MS |
715 | obstack_grow (&dont_print_stat_array_obstack, |
716 | (char *) &target_type, | |
ec31cde5 CM |
717 | sizeof (struct type *)); |
718 | } | |
719 | ||
79a45b7d TT |
720 | opts = *options; |
721 | opts.deref_ref = 0; | |
0e03807e | 722 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
723 | value_embedded_offset (val), |
724 | value_address (val), | |
725 | stream, recurse, val, | |
726 | &opts, current_language); | |
c906108c SS |
727 | } |
728 | ||
0d5de010 | 729 | |
aff410f1 MS |
730 | /* Find the field in *DOMAIN, or its non-virtual base classes, with |
731 | bit offset OFFSET. Set *DOMAIN to the containing type and *FIELDNO | |
732 | to the containing field number. If OFFSET is not exactly at the | |
733 | start of some field, set *DOMAIN to NULL. */ | |
0d5de010 | 734 | |
2c0b251b | 735 | static void |
0d5de010 DJ |
736 | cp_find_class_member (struct type **domain_p, int *fieldno, |
737 | LONGEST offset) | |
738 | { | |
739 | struct type *domain; | |
740 | unsigned int i; | |
741 | unsigned len; | |
742 | ||
743 | *domain_p = check_typedef (*domain_p); | |
744 | domain = *domain_p; | |
745 | len = TYPE_NFIELDS (domain); | |
746 | ||
747 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
748 | { | |
749 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
750 | ||
751 | QUIT; | |
752 | if (offset == bitpos) | |
753 | { | |
754 | *fieldno = i; | |
755 | return; | |
756 | } | |
757 | } | |
758 | ||
759 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
760 | { | |
761 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
762 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
763 | ||
764 | if (offset >= bitpos && offset < bitpos + bitsize) | |
765 | { | |
766 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
767 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
768 | return; | |
769 | } | |
770 | } | |
771 | ||
772 | *domain_p = NULL; | |
773 | } | |
774 | ||
c906108c | 775 | void |
ad4820ab | 776 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 777 | struct ui_file *stream, char *prefix) |
c906108c | 778 | { |
e17a4113 UW |
779 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
780 | ||
c906108c SS |
781 | /* VAL is a byte offset into the structure type DOMAIN. |
782 | Find the name of the field for that offset and | |
783 | print it. */ | |
ad4820ab | 784 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 785 | LONGEST val; |
0d5de010 | 786 | unsigned int fieldno; |
c906108c | 787 | |
aff410f1 MS |
788 | val = extract_signed_integer (valaddr, |
789 | TYPE_LENGTH (type), | |
790 | byte_order); | |
e17a4113 | 791 | |
0d5de010 DJ |
792 | /* Pointers to data members are usually byte offsets into an object. |
793 | Because a data member can have offset zero, and a NULL pointer to | |
794 | member must be distinct from any valid non-NULL pointer to | |
795 | member, either the value is biased or the NULL value has a | |
796 | special representation; both are permitted by ISO C++. HP aCC | |
797 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
798 | and other compilers which use the Itanium ABI use -1 as the NULL | |
799 | value. GDB only supports that last form; to add support for | |
800 | another form, make this into a cp-abi hook. */ | |
c906108c | 801 | |
0d5de010 | 802 | if (val == -1) |
c906108c | 803 | { |
0d5de010 DJ |
804 | fprintf_filtered (stream, "NULL"); |
805 | return; | |
c906108c | 806 | } |
0d5de010 DJ |
807 | |
808 | cp_find_class_member (&domain, &fieldno, val << 3); | |
809 | ||
810 | if (domain != NULL) | |
c906108c | 811 | { |
0d5cff50 | 812 | const char *name; |
c5504eaf | 813 | |
306d9ac5 | 814 | fputs_filtered (prefix, stream); |
c906108c SS |
815 | name = type_name_no_tag (domain); |
816 | if (name) | |
c5aa993b | 817 | fputs_filtered (name, stream); |
c906108c SS |
818 | else |
819 | c_type_print_base (domain, stream, 0, 0); | |
820 | fprintf_filtered (stream, "::"); | |
0d5de010 | 821 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
822 | } |
823 | else | |
0d5de010 | 824 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
825 | } |
826 | ||
827 | ||
c906108c | 828 | void |
fba45db2 | 829 | _initialize_cp_valprint (void) |
c906108c | 830 | { |
5bf193a2 | 831 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 832 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
833 | Set printing of C++ static members."), _("\ |
834 | Show printing of C++ static members."), NULL, | |
835 | NULL, | |
920d2a44 | 836 | show_static_field_print, |
5bf193a2 | 837 | &setprintlist, &showprintlist); |
c906108c | 838 | |
79a45b7d TT |
839 | add_setshow_boolean_cmd ("vtbl", class_support, |
840 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
841 | Set printing of C++ virtual function tables."), _("\ |
842 | Show printing of C++ virtual function tables."), NULL, | |
843 | NULL, | |
920d2a44 | 844 | show_vtblprint, |
5bf193a2 AC |
845 | &setprintlist, &showprintlist); |
846 | ||
79a45b7d TT |
847 | add_setshow_boolean_cmd ("object", class_support, |
848 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
849 | Set printing of object's derived type based on vtable info."), _("\ |
850 | Show printing of object's derived type based on vtable info."), NULL, | |
851 | NULL, | |
920d2a44 | 852 | show_objectprint, |
5bf193a2 | 853 | &setprintlist, &showprintlist); |
c906108c | 854 | |
aff410f1 MS |
855 | obstack_begin (&dont_print_stat_array_obstack, |
856 | 32 * sizeof (struct type *)); | |
857 | obstack_begin (&dont_print_statmem_obstack, | |
858 | 32 * sizeof (CORE_ADDR)); | |
859 | obstack_begin (&dont_print_vb_obstack, | |
860 | 32 * sizeof (struct type *)); | |
c906108c | 861 | } |