Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
7b6bb8da | 4 | 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
9b254dd1 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
04ea0df1 | 23 | #include "gdb_obstack.h" |
c906108c SS |
24 | #include "symtab.h" |
25 | #include "gdbtypes.h" | |
26 | #include "expression.h" | |
27 | #include "value.h" | |
28 | #include "command.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "demangle.h" | |
31 | #include "annotate.h" | |
32 | #include "gdb_string.h" | |
33 | #include "c-lang.h" | |
34 | #include "target.h" | |
b9d652ac | 35 | #include "cp-abi.h" |
973177d3 | 36 | #include "valprint.h" |
d3cbe7ef | 37 | #include "cp-support.h" |
cf309262 | 38 | #include "language.h" |
a6bac58e | 39 | #include "python/python.h" |
8af8e3bc | 40 | #include "exceptions.h" |
c906108c | 41 | |
aff410f1 | 42 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
43 | static void |
44 | show_vtblprint (struct ui_file *file, int from_tty, | |
45 | struct cmd_list_element *c, const char *value) | |
46 | { | |
47 | fprintf_filtered (file, _("\ | |
48 | Printing of C++ virtual function tables is %s.\n"), | |
49 | value); | |
50 | } | |
51 | ||
52 | /* Controls looking up an object's derived type using what we find in | |
53 | its vtables. */ | |
920d2a44 AC |
54 | static void |
55 | show_objectprint (struct ui_file *file, int from_tty, | |
56 | struct cmd_list_element *c, | |
57 | const char *value) | |
58 | { | |
59 | fprintf_filtered (file, _("\ | |
60 | Printing of object's derived type based on vtable info is %s.\n"), | |
61 | value); | |
62 | } | |
63 | ||
920d2a44 AC |
64 | static void |
65 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
66 | struct cmd_list_element *c, |
67 | const char *value) | |
920d2a44 | 68 | { |
aff410f1 MS |
69 | fprintf_filtered (file, |
70 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
71 | value); |
72 | } | |
73 | ||
c906108c SS |
74 | |
75 | static struct obstack dont_print_vb_obstack; | |
76 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 77 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 78 | |
a14ed312 | 79 | extern void _initialize_cp_valprint (void); |
392a587b | 80 | |
6943961c | 81 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
82 | struct ui_file *, int, |
83 | const struct value_print_options *); | |
c906108c | 84 | |
aff410f1 MS |
85 | static void cp_print_value (struct type *, struct type *, |
86 | const gdb_byte *, int, | |
87 | CORE_ADDR, struct ui_file *, | |
88 | int, const struct value *, | |
89 | const struct value_print_options *, | |
90 | struct type **); | |
c906108c | 91 | |
c906108c | 92 | |
8343f86c | 93 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 94 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 95 | |
c906108c SS |
96 | /* Return truth value for assertion that TYPE is of the type |
97 | "pointer to virtual function". */ | |
98 | ||
99 | int | |
fba45db2 | 100 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c SS |
101 | { |
102 | char *typename = type_name_no_tag (type); | |
103 | ||
8343f86c | 104 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
105 | } |
106 | ||
107 | /* Return truth value for the assertion that TYPE is of the type | |
108 | "pointer to virtual function table". */ | |
109 | ||
110 | int | |
fba45db2 | 111 | cp_is_vtbl_member (struct type *type) |
c906108c | 112 | { |
aff410f1 MS |
113 | /* With older versions of g++, the vtbl field pointed to an array of |
114 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
115 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
116 | { | |
117 | type = TYPE_TARGET_TYPE (type); | |
118 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
119 | { | |
120 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
121 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
122 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
123 | { |
124 | /* Virtual functions tables are full of pointers | |
aff410f1 | 125 | to virtual functions. */ |
c906108c SS |
126 | return cp_is_vtbl_ptr_type (type); |
127 | } | |
128 | } | |
0e5e3ea6 PS |
129 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
130 | { | |
131 | return cp_is_vtbl_ptr_type (type); | |
132 | } | |
133 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
134 | { | |
aff410f1 MS |
135 | /* The type name of the thunk pointer is NULL when using |
136 | dwarf2. We could test for a pointer to a function, but | |
137 | there is no type info for the virtual table either, so it | |
138 | wont help. */ | |
0e5e3ea6 PS |
139 | return cp_is_vtbl_ptr_type (type); |
140 | } | |
c906108c SS |
141 | } |
142 | return 0; | |
143 | } | |
144 | ||
145 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
146 | print out a structure's fields: cp_print_value_fields and |
147 | cp_print_value. | |
c5aa993b | 148 | |
aff410f1 MS |
149 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
150 | meanings as in cp_print_value and c_val_print. | |
c906108c | 151 | |
aff410f1 MS |
152 | 2nd argument REAL_TYPE is used to carry over the type of the |
153 | derived class across the recursion to base classes. | |
c906108c | 154 | |
aff410f1 MS |
155 | DONT_PRINT is an array of baseclass types that we should not print, |
156 | or zero if called from top level. */ | |
c906108c SS |
157 | |
158 | void | |
a2bd3dcd | 159 | cp_print_value_fields (struct type *type, struct type *real_type, |
aff410f1 MS |
160 | const gdb_byte *valaddr, int offset, |
161 | CORE_ADDR address, struct ui_file *stream, | |
162 | int recurse, const struct value *val, | |
79a45b7d | 163 | const struct value_print_options *options, |
aff410f1 MS |
164 | struct type **dont_print_vb, |
165 | int dont_print_statmem) | |
c906108c SS |
166 | { |
167 | int i, len, n_baseclasses; | |
c906108c | 168 | int fields_seen = 0; |
ec31cde5 | 169 | static int last_set_recurse = -1; |
c906108c SS |
170 | |
171 | CHECK_TYPEDEF (type); | |
99903ae3 | 172 | |
ec31cde5 CM |
173 | if (recurse == 0) |
174 | { | |
aff410f1 MS |
175 | /* Any object can be left on obstacks only during an unexpected |
176 | error. */ | |
6036c742 | 177 | |
ec31cde5 | 178 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
179 | { |
180 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
181 | obstack_begin (&dont_print_statmem_obstack, |
182 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 183 | } |
ec31cde5 | 184 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
185 | { |
186 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
187 | obstack_begin (&dont_print_stat_array_obstack, | |
188 | 32 * sizeof (struct type *)); | |
189 | } | |
ec31cde5 | 190 | } |
c906108c SS |
191 | |
192 | fprintf_filtered (stream, "{"); | |
193 | len = TYPE_NFIELDS (type); | |
194 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
195 | ||
196 | /* First, print out baseclasses such that we don't print | |
197 | duplicates of virtual baseclasses. */ | |
198 | ||
199 | if (n_baseclasses > 0) | |
aff410f1 MS |
200 | cp_print_value (type, real_type, valaddr, |
201 | offset, address, stream, | |
202 | recurse + 1, val, options, | |
203 | dont_print_vb); | |
c906108c SS |
204 | |
205 | /* Second, print out data fields */ | |
206 | ||
086280be UW |
207 | /* If there are no data fields, skip this part */ |
208 | if (len == n_baseclasses || !len) | |
c906108c SS |
209 | fprintf_filtered (stream, "<No data fields>"); |
210 | else | |
211 | { | |
f56dcb88 CM |
212 | int statmem_obstack_initial_size = 0; |
213 | int stat_array_obstack_initial_size = 0; | |
99903ae3 | 214 | |
c906108c SS |
215 | if (dont_print_statmem == 0) |
216 | { | |
f56dcb88 | 217 | statmem_obstack_initial_size = |
0b66f317 | 218 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
219 | |
220 | if (last_set_recurse != recurse) | |
221 | { | |
f56dcb88 CM |
222 | stat_array_obstack_initial_size = |
223 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 224 | |
ec31cde5 CM |
225 | last_set_recurse = recurse; |
226 | } | |
c906108c SS |
227 | } |
228 | ||
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 | { | |
79a45b7d | 240 | if (options->pretty) |
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 | ||
79a45b7d | 251 | if (options->pretty) |
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 | } | |
79a45b7d | 260 | if (options->inspect_it) |
c906108c SS |
261 | { |
262 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) | |
263 | fputs_filtered ("\"( ptr \"", stream); | |
264 | else | |
265 | fputs_filtered ("\"( nodef \"", stream); | |
d6a843b5 | 266 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 267 | fputs_filtered ("static ", stream); |
aff410f1 MS |
268 | fprintf_symbol_filtered (stream, |
269 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 270 | current_language->la_language, |
c906108c SS |
271 | DMGL_PARAMS | DMGL_ANSI); |
272 | fputs_filtered ("\" \"", stream); | |
aff410f1 MS |
273 | fprintf_symbol_filtered (stream, |
274 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 275 | current_language->la_language, |
c906108c SS |
276 | DMGL_PARAMS | DMGL_ANSI); |
277 | fputs_filtered ("\") \"", stream); | |
278 | } | |
279 | else | |
280 | { | |
281 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
282 | ||
d6a843b5 | 283 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 284 | fputs_filtered ("static ", stream); |
aff410f1 MS |
285 | fprintf_symbol_filtered (stream, |
286 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 287 | current_language->la_language, |
c906108c SS |
288 | DMGL_PARAMS | DMGL_ANSI); |
289 | annotate_field_name_end (); | |
aff410f1 MS |
290 | /* Do not print leading '=' in case of anonymous |
291 | unions. */ | |
c906108c SS |
292 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) |
293 | fputs_filtered (" = ", stream); | |
294 | annotate_field_value (); | |
295 | } | |
296 | ||
d6a843b5 JK |
297 | if (!field_is_static (&TYPE_FIELD (type, i)) |
298 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 299 | { |
6943961c | 300 | struct value *v; |
c906108c | 301 | |
aff410f1 MS |
302 | /* Bitfields require special handling, especially due to |
303 | byte order problems. */ | |
c906108c SS |
304 | if (TYPE_FIELD_IGNORE (type, i)) |
305 | { | |
c5aa993b | 306 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 307 | } |
8cf6f0b1 TT |
308 | else if (value_bits_synthetic_pointer (val, |
309 | TYPE_FIELD_BITPOS (type, | |
310 | i), | |
311 | TYPE_FIELD_BITSIZE (type, | |
312 | i))) | |
313 | { | |
314 | fputs_filtered (_("<synthetic pointer>"), stream); | |
315 | } | |
aff410f1 MS |
316 | else if (!value_bits_valid (val, |
317 | TYPE_FIELD_BITPOS (type, i), | |
0e03807e TT |
318 | TYPE_FIELD_BITSIZE (type, i))) |
319 | { | |
585fdaa1 | 320 | val_print_optimized_out (stream); |
0e03807e | 321 | } |
c906108c SS |
322 | else |
323 | { | |
79a45b7d | 324 | struct value_print_options opts = *options; |
c5504eaf | 325 | |
79a45b7d | 326 | opts.deref_ref = 0; |
5467c6c8 PA |
327 | |
328 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 329 | |
79a45b7d | 330 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 331 | current_language); |
c906108c SS |
332 | } |
333 | } | |
334 | else | |
335 | { | |
336 | if (TYPE_FIELD_IGNORE (type, i)) | |
337 | { | |
aff410f1 MS |
338 | fputs_filtered ("<optimized out or zero length>", |
339 | stream); | |
c906108c | 340 | } |
d6a843b5 | 341 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 342 | { |
ee86786c TT |
343 | volatile struct gdb_exception ex; |
344 | struct value *v = NULL; | |
345 | ||
346 | TRY_CATCH (ex, RETURN_MASK_ERROR) | |
347 | { | |
348 | v = value_static_field (type, i); | |
349 | } | |
350 | ||
351 | if (ex.reason < 0) | |
352 | fprintf_filtered (stream, | |
353 | _("<error reading variable: %s>"), | |
354 | ex.message); | |
355 | else if (v == NULL) | |
585fdaa1 | 356 | val_print_optimized_out (stream); |
c906108c | 357 | else |
aff410f1 MS |
358 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
359 | v, stream, recurse + 1, | |
360 | options); | |
c906108c SS |
361 | } |
362 | else | |
363 | { | |
79a45b7d | 364 | struct value_print_options opts = *options; |
c5504eaf | 365 | |
79a45b7d | 366 | opts.deref_ref = 0; |
c5aa993b | 367 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
368 | valaddr, |
369 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 370 | address, |
0e03807e | 371 | stream, recurse + 1, val, &opts, |
d8ca156b | 372 | current_language); |
c906108c SS |
373 | } |
374 | } | |
375 | annotate_field_end (); | |
376 | } | |
377 | ||
378 | if (dont_print_statmem == 0) | |
379 | { | |
0b66f317 CM |
380 | int obstack_final_size = |
381 | obstack_object_size (&dont_print_statmem_obstack); | |
382 | ||
aff410f1 MS |
383 | if (obstack_final_size > statmem_obstack_initial_size) |
384 | { | |
385 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 386 | |
aff410f1 MS |
387 | void *free_to_ptr = |
388 | obstack_next_free (&dont_print_statmem_obstack) - | |
389 | (obstack_final_size - statmem_obstack_initial_size); | |
0b66f317 | 390 | |
aff410f1 MS |
391 | obstack_free (&dont_print_statmem_obstack, |
392 | free_to_ptr); | |
393 | } | |
ec31cde5 CM |
394 | |
395 | if (last_set_recurse != recurse) | |
396 | { | |
f56dcb88 CM |
397 | int obstack_final_size = |
398 | obstack_object_size (&dont_print_stat_array_obstack); | |
399 | ||
400 | if (obstack_final_size > stat_array_obstack_initial_size) | |
401 | { | |
402 | void *free_to_ptr = | |
aff410f1 MS |
403 | obstack_next_free (&dont_print_stat_array_obstack) |
404 | - (obstack_final_size | |
405 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
406 | |
407 | obstack_free (&dont_print_stat_array_obstack, | |
408 | free_to_ptr); | |
409 | } | |
ec31cde5 CM |
410 | last_set_recurse = -1; |
411 | } | |
c906108c SS |
412 | } |
413 | ||
79a45b7d | 414 | if (options->pretty) |
c906108c SS |
415 | { |
416 | fprintf_filtered (stream, "\n"); | |
417 | print_spaces_filtered (2 * recurse, stream); | |
418 | } | |
c5aa993b | 419 | } /* if there are data fields */ |
c5aa993b | 420 | |
c906108c SS |
421 | fprintf_filtered (stream, "}"); |
422 | } | |
423 | ||
edf3d5f3 TT |
424 | /* Like cp_print_value_fields, but find the runtime type of the object |
425 | and pass it as the `real_type' argument to cp_print_value_fields. | |
426 | This function is a hack to work around the fact that | |
427 | common_val_print passes the embedded offset to val_print, but not | |
428 | the enclosing type. */ | |
429 | ||
430 | void | |
431 | cp_print_value_fields_rtti (struct type *type, | |
432 | const gdb_byte *valaddr, int offset, | |
433 | CORE_ADDR address, | |
434 | struct ui_file *stream, int recurse, | |
0e03807e | 435 | const struct value *val, |
edf3d5f3 | 436 | const struct value_print_options *options, |
c5504eaf MS |
437 | struct type **dont_print_vb, |
438 | int dont_print_statmem) | |
edf3d5f3 | 439 | { |
0e03807e TT |
440 | struct type *real_type = NULL; |
441 | ||
442 | /* We require all bits to be valid in order to attempt a | |
443 | conversion. */ | |
444 | if (value_bits_valid (val, TARGET_CHAR_BIT * offset, | |
445 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
446 | { | |
447 | struct value *value; | |
448 | int full, top, using_enc; | |
449 | ||
450 | /* Ugh, we have to convert back to a value here. */ | |
451 | value = value_from_contents_and_address (type, valaddr + offset, | |
452 | address + offset); | |
aff410f1 MS |
453 | /* We don't actually care about most of the result here -- just |
454 | the type. We already have the correct offset, due to how | |
455 | val_print was initially called. */ | |
0e03807e TT |
456 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
457 | } | |
458 | ||
edf3d5f3 TT |
459 | if (!real_type) |
460 | real_type = type; | |
461 | ||
462 | cp_print_value_fields (type, real_type, valaddr, offset, | |
0e03807e | 463 | address, stream, recurse, val, options, |
edf3d5f3 TT |
464 | dont_print_vb, dont_print_statmem); |
465 | } | |
466 | ||
aff410f1 MS |
467 | /* Special val_print routine to avoid printing multiple copies of |
468 | virtual baseclasses. */ | |
c906108c SS |
469 | |
470 | static void | |
a2bd3dcd | 471 | cp_print_value (struct type *type, struct type *real_type, |
aff410f1 MS |
472 | const gdb_byte *valaddr, int offset, |
473 | CORE_ADDR address, struct ui_file *stream, | |
474 | int recurse, const struct value *val, | |
79a45b7d TT |
475 | const struct value_print_options *options, |
476 | struct type **dont_print_vb) | |
c906108c | 477 | { |
c906108c | 478 | struct type **last_dont_print |
2c63a960 | 479 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 480 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 481 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
482 | int thisoffset; |
483 | struct type *thistype; | |
c906108c SS |
484 | |
485 | if (dont_print_vb == 0) | |
486 | { | |
aff410f1 MS |
487 | /* If we're at top level, carve out a completely fresh chunk of |
488 | the obstack and use that until this particular invocation | |
489 | returns. */ | |
c906108c SS |
490 | /* Bump up the high-water mark. Now alpha is omega. */ |
491 | obstack_finish (&dont_print_vb_obstack); | |
492 | } | |
493 | ||
494 | for (i = 0; i < n_baseclasses; i++) | |
495 | { | |
8af8e3bc | 496 | int boffset = 0; |
c906108c SS |
497 | int skip; |
498 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
499 | char *basename = TYPE_NAME (baseclass); | |
8af8e3bc PA |
500 | const gdb_byte *base_valaddr = NULL; |
501 | const struct value *base_val = NULL; | |
502 | volatile struct gdb_exception ex; | |
c906108c SS |
503 | |
504 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
505 | { | |
506 | struct type **first_dont_print | |
2c63a960 | 507 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 508 | |
aff410f1 MS |
509 | int j = (struct type **) |
510 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
511 | |
512 | while (--j >= 0) | |
513 | if (baseclass == first_dont_print[j]) | |
514 | goto flush_it; | |
515 | ||
516 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
517 | } | |
518 | ||
b9d652ac DJ |
519 | thisoffset = offset; |
520 | thistype = real_type; | |
086280be | 521 | |
8af8e3bc | 522 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
c5aa993b | 523 | { |
8af8e3bc PA |
524 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
525 | } | |
526 | if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR) | |
527 | skip = -1; | |
528 | else if (ex.reason < 0) | |
529 | skip = 1; | |
530 | else | |
531 | { | |
532 | skip = 0; | |
c906108c | 533 | |
8af8e3bc | 534 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 535 | { |
8af8e3bc PA |
536 | /* The virtual base class pointer might have been |
537 | clobbered by the user program. Make sure that it | |
538 | still points to a valid memory location. */ | |
539 | ||
540 | if ((boffset + offset) < 0 | |
541 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
542 | { | |
543 | /* FIXME (alloca): unsafe if baseclass is really | |
544 | really large. */ | |
545 | gdb_byte *buf = alloca (TYPE_LENGTH (baseclass)); | |
546 | ||
547 | if (target_read_memory (address + boffset, buf, | |
548 | TYPE_LENGTH (baseclass)) != 0) | |
549 | skip = 1; | |
550 | base_val = value_from_contents_and_address (baseclass, | |
551 | buf, | |
552 | address + boffset); | |
553 | thisoffset = 0; | |
554 | boffset = 0; | |
555 | thistype = baseclass; | |
556 | base_valaddr = value_contents_for_printing_const (base_val); | |
557 | } | |
558 | else | |
559 | { | |
560 | base_valaddr = valaddr; | |
561 | base_val = val; | |
562 | } | |
c5aa993b JM |
563 | } |
564 | else | |
de4127a3 PA |
565 | { |
566 | base_valaddr = valaddr; | |
567 | base_val = val; | |
568 | } | |
c906108c SS |
569 | } |
570 | ||
aff410f1 | 571 | /* Now do the printing. */ |
79a45b7d | 572 | if (options->pretty) |
c906108c SS |
573 | { |
574 | fprintf_filtered (stream, "\n"); | |
575 | print_spaces_filtered (2 * recurse, stream); | |
576 | } | |
577 | fputs_filtered ("<", stream); | |
aff410f1 MS |
578 | /* Not sure what the best notation is in the case where there is |
579 | no baseclass name. */ | |
c906108c SS |
580 | fputs_filtered (basename ? basename : "", stream); |
581 | fputs_filtered ("> = ", stream); | |
582 | ||
8af8e3bc PA |
583 | if (skip < 0) |
584 | val_print_unavailable (stream); | |
585 | else if (skip > 0) | |
586 | val_print_invalid_address (stream); | |
c906108c | 587 | else |
a6bac58e TT |
588 | { |
589 | int result = 0; | |
590 | ||
591 | /* Attempt to run the Python pretty-printers on the | |
592 | baseclass if possible. */ | |
593 | if (!options->raw) | |
594 | result = apply_val_pretty_printer (baseclass, base_valaddr, | |
595 | thisoffset + boffset, | |
de4127a3 PA |
596 | value_address (base_val), |
597 | stream, recurse, base_val, | |
598 | options, current_language); | |
599 | ||
600 | ||
a6bac58e TT |
601 | |
602 | if (!result) | |
603 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
604 | thisoffset + boffset, |
605 | value_address (base_val), | |
606 | stream, recurse, base_val, options, | |
a6bac58e TT |
607 | ((struct type **) |
608 | obstack_base (&dont_print_vb_obstack)), | |
609 | 0); | |
610 | } | |
c906108c SS |
611 | fputs_filtered (", ", stream); |
612 | ||
613 | flush_it: | |
614 | ; | |
615 | } | |
616 | ||
617 | if (dont_print_vb == 0) | |
618 | { | |
619 | /* Free the space used to deal with the printing | |
c5aa993b | 620 | of this type from top level. */ |
c906108c SS |
621 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
622 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 623 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
624 | dont_print_vb_obstack = tmp_obstack; |
625 | } | |
626 | } | |
627 | ||
aff410f1 MS |
628 | /* Print value of a static member. To avoid infinite recursion when |
629 | printing a class that contains a static instance of the class, we | |
630 | keep the addresses of all printed static member classes in an | |
631 | obstack and refuse to print them more than once. | |
c906108c | 632 | |
79a45b7d | 633 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
634 | have the same meanings as in c_val_print. */ |
635 | ||
636 | static void | |
2c63a960 | 637 | cp_print_static_field (struct type *type, |
6943961c | 638 | struct value *val, |
2c63a960 | 639 | struct ui_file *stream, |
2c63a960 | 640 | int recurse, |
79a45b7d | 641 | const struct value_print_options *options) |
c906108c | 642 | { |
79a45b7d | 643 | struct value_print_options opts; |
ec31cde5 | 644 | |
c906108c SS |
645 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
646 | { | |
647 | CORE_ADDR *first_dont_print; | |
42ae5230 | 648 | CORE_ADDR addr; |
c906108c SS |
649 | int i; |
650 | ||
651 | first_dont_print | |
c5aa993b | 652 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
653 | i = obstack_object_size (&dont_print_statmem_obstack) |
654 | / sizeof (CORE_ADDR); | |
c906108c SS |
655 | |
656 | while (--i >= 0) | |
657 | { | |
42ae5230 | 658 | if (value_address (val) == first_dont_print[i]) |
c906108c | 659 | { |
2c63a960 JB |
660 | fputs_filtered ("<same as static member of an already" |
661 | " seen type>", | |
c906108c SS |
662 | stream); |
663 | return; | |
664 | } | |
665 | } | |
666 | ||
42ae5230 TT |
667 | addr = value_address (val); |
668 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 669 | sizeof (CORE_ADDR)); |
c906108c | 670 | CHECK_TYPEDEF (type); |
edf3d5f3 | 671 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 672 | value_contents_for_printing (val), |
42ae5230 | 673 | value_embedded_offset (val), addr, |
aff410f1 MS |
674 | stream, recurse, val, |
675 | options, NULL, 1); | |
c906108c SS |
676 | return; |
677 | } | |
79a45b7d | 678 | |
ec31cde5 CM |
679 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
680 | { | |
681 | struct type **first_dont_print; | |
682 | int i; | |
683 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
684 | ||
685 | first_dont_print | |
686 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
687 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 688 | / sizeof (struct type *); |
ec31cde5 CM |
689 | |
690 | while (--i >= 0) | |
691 | { | |
692 | if (target_type == first_dont_print[i]) | |
693 | { | |
694 | fputs_filtered ("<same as static member of an already" | |
695 | " seen type>", | |
696 | stream); | |
697 | return; | |
698 | } | |
699 | } | |
700 | ||
aff410f1 MS |
701 | obstack_grow (&dont_print_stat_array_obstack, |
702 | (char *) &target_type, | |
ec31cde5 CM |
703 | sizeof (struct type *)); |
704 | } | |
705 | ||
79a45b7d TT |
706 | opts = *options; |
707 | opts.deref_ref = 0; | |
0e03807e | 708 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
709 | value_embedded_offset (val), |
710 | value_address (val), | |
711 | stream, recurse, val, | |
712 | &opts, current_language); | |
c906108c SS |
713 | } |
714 | ||
0d5de010 | 715 | |
aff410f1 MS |
716 | /* Find the field in *DOMAIN, or its non-virtual base classes, with |
717 | bit offset OFFSET. Set *DOMAIN to the containing type and *FIELDNO | |
718 | to the containing field number. If OFFSET is not exactly at the | |
719 | start of some field, set *DOMAIN to NULL. */ | |
0d5de010 | 720 | |
2c0b251b | 721 | static void |
0d5de010 DJ |
722 | cp_find_class_member (struct type **domain_p, int *fieldno, |
723 | LONGEST offset) | |
724 | { | |
725 | struct type *domain; | |
726 | unsigned int i; | |
727 | unsigned len; | |
728 | ||
729 | *domain_p = check_typedef (*domain_p); | |
730 | domain = *domain_p; | |
731 | len = TYPE_NFIELDS (domain); | |
732 | ||
733 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
734 | { | |
735 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
736 | ||
737 | QUIT; | |
738 | if (offset == bitpos) | |
739 | { | |
740 | *fieldno = i; | |
741 | return; | |
742 | } | |
743 | } | |
744 | ||
745 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
746 | { | |
747 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
748 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
749 | ||
750 | if (offset >= bitpos && offset < bitpos + bitsize) | |
751 | { | |
752 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
753 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
754 | return; | |
755 | } | |
756 | } | |
757 | ||
758 | *domain_p = NULL; | |
759 | } | |
760 | ||
c906108c | 761 | void |
ad4820ab | 762 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 763 | struct ui_file *stream, char *prefix) |
c906108c | 764 | { |
e17a4113 UW |
765 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
766 | ||
c906108c SS |
767 | /* VAL is a byte offset into the structure type DOMAIN. |
768 | Find the name of the field for that offset and | |
769 | print it. */ | |
ad4820ab | 770 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 771 | LONGEST val; |
0d5de010 | 772 | unsigned int fieldno; |
c906108c | 773 | |
aff410f1 MS |
774 | val = extract_signed_integer (valaddr, |
775 | TYPE_LENGTH (type), | |
776 | byte_order); | |
e17a4113 | 777 | |
0d5de010 DJ |
778 | /* Pointers to data members are usually byte offsets into an object. |
779 | Because a data member can have offset zero, and a NULL pointer to | |
780 | member must be distinct from any valid non-NULL pointer to | |
781 | member, either the value is biased or the NULL value has a | |
782 | special representation; both are permitted by ISO C++. HP aCC | |
783 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
784 | and other compilers which use the Itanium ABI use -1 as the NULL | |
785 | value. GDB only supports that last form; to add support for | |
786 | another form, make this into a cp-abi hook. */ | |
c906108c | 787 | |
0d5de010 | 788 | if (val == -1) |
c906108c | 789 | { |
0d5de010 DJ |
790 | fprintf_filtered (stream, "NULL"); |
791 | return; | |
c906108c | 792 | } |
0d5de010 DJ |
793 | |
794 | cp_find_class_member (&domain, &fieldno, val << 3); | |
795 | ||
796 | if (domain != NULL) | |
c906108c SS |
797 | { |
798 | char *name; | |
c5504eaf | 799 | |
306d9ac5 | 800 | fputs_filtered (prefix, stream); |
c906108c SS |
801 | name = type_name_no_tag (domain); |
802 | if (name) | |
c5aa993b | 803 | fputs_filtered (name, stream); |
c906108c SS |
804 | else |
805 | c_type_print_base (domain, stream, 0, 0); | |
806 | fprintf_filtered (stream, "::"); | |
0d5de010 | 807 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
808 | } |
809 | else | |
0d5de010 | 810 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
811 | } |
812 | ||
813 | ||
c906108c | 814 | void |
fba45db2 | 815 | _initialize_cp_valprint (void) |
c906108c | 816 | { |
5bf193a2 | 817 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 818 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
819 | Set printing of C++ static members."), _("\ |
820 | Show printing of C++ static members."), NULL, | |
821 | NULL, | |
920d2a44 | 822 | show_static_field_print, |
5bf193a2 | 823 | &setprintlist, &showprintlist); |
c906108c | 824 | |
79a45b7d TT |
825 | add_setshow_boolean_cmd ("vtbl", class_support, |
826 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
827 | Set printing of C++ virtual function tables."), _("\ |
828 | Show printing of C++ virtual function tables."), NULL, | |
829 | NULL, | |
920d2a44 | 830 | show_vtblprint, |
5bf193a2 AC |
831 | &setprintlist, &showprintlist); |
832 | ||
79a45b7d TT |
833 | add_setshow_boolean_cmd ("object", class_support, |
834 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
835 | Set printing of object's derived type based on vtable info."), _("\ |
836 | Show printing of object's derived type based on vtable info."), NULL, | |
837 | NULL, | |
920d2a44 | 838 | show_objectprint, |
5bf193a2 | 839 | &setprintlist, &showprintlist); |
c906108c | 840 | |
aff410f1 MS |
841 | obstack_begin (&dont_print_stat_array_obstack, |
842 | 32 * sizeof (struct type *)); | |
843 | obstack_begin (&dont_print_statmem_obstack, | |
844 | 32 * sizeof (CORE_ADDR)); | |
845 | obstack_begin (&dont_print_vb_obstack, | |
846 | 32 * sizeof (struct type *)); | |
c906108c | 847 | } |