Commit | Line | Data |
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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" |
79d43c61 | 40 | #include "typeprint.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 | 101 | { |
0d5cff50 | 102 | const char *typename = type_name_no_tag (type); |
c906108c | 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; | |
7977e5d2 TT |
214 | struct type *vptr_basetype = NULL; |
215 | int vptr_fieldno; | |
216 | ||
c906108c SS |
217 | if (dont_print_statmem == 0) |
218 | { | |
f56dcb88 | 219 | statmem_obstack_initial_size = |
0b66f317 | 220 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
221 | |
222 | if (last_set_recurse != recurse) | |
223 | { | |
f56dcb88 CM |
224 | stat_array_obstack_initial_size = |
225 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 226 | |
ec31cde5 CM |
227 | last_set_recurse = recurse; |
228 | } | |
c906108c SS |
229 | } |
230 | ||
7977e5d2 | 231 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
232 | for (i = n_baseclasses; i < len; i++) |
233 | { | |
234 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 235 | if (!options->static_field_print |
d6a843b5 | 236 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
237 | continue; |
238 | ||
c906108c SS |
239 | if (fields_seen) |
240 | fprintf_filtered (stream, ", "); | |
241 | else if (n_baseclasses > 0) | |
242 | { | |
79a45b7d | 243 | if (options->pretty) |
c906108c SS |
244 | { |
245 | fprintf_filtered (stream, "\n"); | |
246 | print_spaces_filtered (2 + 2 * recurse, stream); | |
247 | fputs_filtered ("members of ", stream); | |
248 | fputs_filtered (type_name_no_tag (type), stream); | |
249 | fputs_filtered (": ", stream); | |
250 | } | |
251 | } | |
252 | fields_seen = 1; | |
253 | ||
79a45b7d | 254 | if (options->pretty) |
c906108c SS |
255 | { |
256 | fprintf_filtered (stream, "\n"); | |
257 | print_spaces_filtered (2 + 2 * recurse, stream); | |
258 | } | |
c5aa993b | 259 | else |
c906108c SS |
260 | { |
261 | wrap_here (n_spaces (2 + 2 * recurse)); | |
262 | } | |
79a45b7d | 263 | if (options->inspect_it) |
c906108c SS |
264 | { |
265 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) | |
266 | fputs_filtered ("\"( ptr \"", stream); | |
267 | else | |
268 | fputs_filtered ("\"( nodef \"", stream); | |
d6a843b5 | 269 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 270 | fputs_filtered ("static ", stream); |
aff410f1 MS |
271 | fprintf_symbol_filtered (stream, |
272 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 273 | current_language->la_language, |
c906108c SS |
274 | DMGL_PARAMS | DMGL_ANSI); |
275 | fputs_filtered ("\" \"", stream); | |
aff410f1 MS |
276 | fprintf_symbol_filtered (stream, |
277 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 278 | current_language->la_language, |
c906108c SS |
279 | DMGL_PARAMS | DMGL_ANSI); |
280 | fputs_filtered ("\") \"", stream); | |
281 | } | |
282 | else | |
283 | { | |
284 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
285 | ||
d6a843b5 | 286 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 287 | fputs_filtered ("static ", stream); |
aff410f1 MS |
288 | fprintf_symbol_filtered (stream, |
289 | TYPE_FIELD_NAME (type, i), | |
cf309262 | 290 | current_language->la_language, |
c906108c SS |
291 | DMGL_PARAMS | DMGL_ANSI); |
292 | annotate_field_name_end (); | |
aff410f1 MS |
293 | /* Do not print leading '=' in case of anonymous |
294 | unions. */ | |
c906108c SS |
295 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) |
296 | fputs_filtered (" = ", stream); | |
297 | annotate_field_value (); | |
298 | } | |
299 | ||
d6a843b5 JK |
300 | if (!field_is_static (&TYPE_FIELD (type, i)) |
301 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 302 | { |
6943961c | 303 | struct value *v; |
c906108c | 304 | |
aff410f1 MS |
305 | /* Bitfields require special handling, especially due to |
306 | byte order problems. */ | |
c906108c SS |
307 | if (TYPE_FIELD_IGNORE (type, i)) |
308 | { | |
c5aa993b | 309 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 310 | } |
8cf6f0b1 TT |
311 | else if (value_bits_synthetic_pointer (val, |
312 | TYPE_FIELD_BITPOS (type, | |
313 | i), | |
314 | TYPE_FIELD_BITSIZE (type, | |
315 | i))) | |
316 | { | |
317 | fputs_filtered (_("<synthetic pointer>"), stream); | |
318 | } | |
aff410f1 MS |
319 | else if (!value_bits_valid (val, |
320 | TYPE_FIELD_BITPOS (type, i), | |
0e03807e TT |
321 | TYPE_FIELD_BITSIZE (type, i))) |
322 | { | |
585fdaa1 | 323 | val_print_optimized_out (stream); |
0e03807e | 324 | } |
c906108c SS |
325 | else |
326 | { | |
79a45b7d | 327 | struct value_print_options opts = *options; |
c5504eaf | 328 | |
79a45b7d | 329 | opts.deref_ref = 0; |
5467c6c8 PA |
330 | |
331 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 332 | |
79a45b7d | 333 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 334 | current_language); |
c906108c SS |
335 | } |
336 | } | |
337 | else | |
338 | { | |
339 | if (TYPE_FIELD_IGNORE (type, i)) | |
340 | { | |
aff410f1 MS |
341 | fputs_filtered ("<optimized out or zero length>", |
342 | stream); | |
c906108c | 343 | } |
d6a843b5 | 344 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 345 | { |
ee86786c TT |
346 | volatile struct gdb_exception ex; |
347 | struct value *v = NULL; | |
348 | ||
349 | TRY_CATCH (ex, RETURN_MASK_ERROR) | |
350 | { | |
351 | v = value_static_field (type, i); | |
352 | } | |
353 | ||
354 | if (ex.reason < 0) | |
355 | fprintf_filtered (stream, | |
356 | _("<error reading variable: %s>"), | |
357 | ex.message); | |
358 | else if (v == NULL) | |
585fdaa1 | 359 | val_print_optimized_out (stream); |
c906108c | 360 | else |
aff410f1 MS |
361 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
362 | v, stream, recurse + 1, | |
363 | options); | |
c906108c | 364 | } |
7977e5d2 | 365 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 366 | { |
a72c8f6a JK |
367 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
368 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
369 | ||
370 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
371 | { | |
372 | CORE_ADDR addr; | |
373 | ||
374 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
375 | print_function_pointer_address (options, |
376 | get_type_arch (type), | |
377 | addr, stream); | |
a72c8f6a | 378 | } |
410528f0 | 379 | } |
c906108c SS |
380 | else |
381 | { | |
79a45b7d | 382 | struct value_print_options opts = *options; |
c5504eaf | 383 | |
79a45b7d | 384 | opts.deref_ref = 0; |
c5aa993b | 385 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
386 | valaddr, |
387 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 388 | address, |
0e03807e | 389 | stream, recurse + 1, val, &opts, |
d8ca156b | 390 | current_language); |
c906108c SS |
391 | } |
392 | } | |
393 | annotate_field_end (); | |
394 | } | |
395 | ||
396 | if (dont_print_statmem == 0) | |
397 | { | |
0b66f317 CM |
398 | int obstack_final_size = |
399 | obstack_object_size (&dont_print_statmem_obstack); | |
400 | ||
aff410f1 MS |
401 | if (obstack_final_size > statmem_obstack_initial_size) |
402 | { | |
403 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 404 | |
aff410f1 MS |
405 | void *free_to_ptr = |
406 | obstack_next_free (&dont_print_statmem_obstack) - | |
407 | (obstack_final_size - statmem_obstack_initial_size); | |
0b66f317 | 408 | |
aff410f1 MS |
409 | obstack_free (&dont_print_statmem_obstack, |
410 | free_to_ptr); | |
411 | } | |
ec31cde5 CM |
412 | |
413 | if (last_set_recurse != recurse) | |
414 | { | |
f56dcb88 CM |
415 | int obstack_final_size = |
416 | obstack_object_size (&dont_print_stat_array_obstack); | |
417 | ||
418 | if (obstack_final_size > stat_array_obstack_initial_size) | |
419 | { | |
420 | void *free_to_ptr = | |
aff410f1 MS |
421 | obstack_next_free (&dont_print_stat_array_obstack) |
422 | - (obstack_final_size | |
423 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
424 | |
425 | obstack_free (&dont_print_stat_array_obstack, | |
426 | free_to_ptr); | |
427 | } | |
ec31cde5 CM |
428 | last_set_recurse = -1; |
429 | } | |
c906108c SS |
430 | } |
431 | ||
79a45b7d | 432 | if (options->pretty) |
c906108c SS |
433 | { |
434 | fprintf_filtered (stream, "\n"); | |
435 | print_spaces_filtered (2 * recurse, stream); | |
436 | } | |
c5aa993b | 437 | } /* if there are data fields */ |
c5aa993b | 438 | |
c906108c SS |
439 | fprintf_filtered (stream, "}"); |
440 | } | |
441 | ||
edf3d5f3 TT |
442 | /* Like cp_print_value_fields, but find the runtime type of the object |
443 | and pass it as the `real_type' argument to cp_print_value_fields. | |
444 | This function is a hack to work around the fact that | |
445 | common_val_print passes the embedded offset to val_print, but not | |
446 | the enclosing type. */ | |
447 | ||
448 | void | |
449 | cp_print_value_fields_rtti (struct type *type, | |
450 | const gdb_byte *valaddr, int offset, | |
451 | CORE_ADDR address, | |
452 | struct ui_file *stream, int recurse, | |
0e03807e | 453 | const struct value *val, |
edf3d5f3 | 454 | const struct value_print_options *options, |
c5504eaf MS |
455 | struct type **dont_print_vb, |
456 | int dont_print_statmem) | |
edf3d5f3 | 457 | { |
0e03807e TT |
458 | struct type *real_type = NULL; |
459 | ||
460 | /* We require all bits to be valid in order to attempt a | |
461 | conversion. */ | |
462 | if (value_bits_valid (val, TARGET_CHAR_BIT * offset, | |
463 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
464 | { | |
465 | struct value *value; | |
466 | int full, top, using_enc; | |
467 | ||
468 | /* Ugh, we have to convert back to a value here. */ | |
469 | value = value_from_contents_and_address (type, valaddr + offset, | |
470 | address + offset); | |
aff410f1 MS |
471 | /* We don't actually care about most of the result here -- just |
472 | the type. We already have the correct offset, due to how | |
473 | val_print was initially called. */ | |
0e03807e TT |
474 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
475 | } | |
476 | ||
edf3d5f3 TT |
477 | if (!real_type) |
478 | real_type = type; | |
479 | ||
480 | cp_print_value_fields (type, real_type, valaddr, offset, | |
0e03807e | 481 | address, stream, recurse, val, options, |
edf3d5f3 TT |
482 | dont_print_vb, dont_print_statmem); |
483 | } | |
484 | ||
aff410f1 MS |
485 | /* Special val_print routine to avoid printing multiple copies of |
486 | virtual baseclasses. */ | |
c906108c SS |
487 | |
488 | static void | |
a2bd3dcd | 489 | cp_print_value (struct type *type, struct type *real_type, |
aff410f1 MS |
490 | const gdb_byte *valaddr, int offset, |
491 | CORE_ADDR address, struct ui_file *stream, | |
492 | int recurse, const struct value *val, | |
79a45b7d TT |
493 | const struct value_print_options *options, |
494 | struct type **dont_print_vb) | |
c906108c | 495 | { |
c906108c | 496 | struct type **last_dont_print |
2c63a960 | 497 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 498 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 499 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
500 | int thisoffset; |
501 | struct type *thistype; | |
c906108c SS |
502 | |
503 | if (dont_print_vb == 0) | |
504 | { | |
aff410f1 MS |
505 | /* If we're at top level, carve out a completely fresh chunk of |
506 | the obstack and use that until this particular invocation | |
507 | returns. */ | |
c906108c SS |
508 | /* Bump up the high-water mark. Now alpha is omega. */ |
509 | obstack_finish (&dont_print_vb_obstack); | |
510 | } | |
511 | ||
512 | for (i = 0; i < n_baseclasses; i++) | |
513 | { | |
8af8e3bc | 514 | int boffset = 0; |
c906108c SS |
515 | int skip; |
516 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
0d5cff50 | 517 | const char *basename = TYPE_NAME (baseclass); |
8af8e3bc PA |
518 | const gdb_byte *base_valaddr = NULL; |
519 | const struct value *base_val = NULL; | |
520 | volatile struct gdb_exception ex; | |
c906108c SS |
521 | |
522 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
523 | { | |
524 | struct type **first_dont_print | |
2c63a960 | 525 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 526 | |
aff410f1 MS |
527 | int j = (struct type **) |
528 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
529 | |
530 | while (--j >= 0) | |
531 | if (baseclass == first_dont_print[j]) | |
532 | goto flush_it; | |
533 | ||
534 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
535 | } | |
536 | ||
b9d652ac DJ |
537 | thisoffset = offset; |
538 | thistype = real_type; | |
086280be | 539 | |
8af8e3bc | 540 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
c5aa993b | 541 | { |
8af8e3bc PA |
542 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
543 | } | |
544 | if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR) | |
545 | skip = -1; | |
546 | else if (ex.reason < 0) | |
547 | skip = 1; | |
548 | else | |
549 | { | |
550 | skip = 0; | |
c906108c | 551 | |
8af8e3bc | 552 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 553 | { |
8af8e3bc PA |
554 | /* The virtual base class pointer might have been |
555 | clobbered by the user program. Make sure that it | |
556 | still points to a valid memory location. */ | |
557 | ||
558 | if ((boffset + offset) < 0 | |
559 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
560 | { | |
d5161074 SP |
561 | gdb_byte *buf; |
562 | struct cleanup *back_to; | |
563 | ||
564 | buf = xmalloc (TYPE_LENGTH (baseclass)); | |
565 | back_to = make_cleanup (xfree, buf); | |
8af8e3bc PA |
566 | |
567 | if (target_read_memory (address + boffset, buf, | |
568 | TYPE_LENGTH (baseclass)) != 0) | |
569 | skip = 1; | |
570 | base_val = value_from_contents_and_address (baseclass, | |
571 | buf, | |
572 | address + boffset); | |
573 | thisoffset = 0; | |
574 | boffset = 0; | |
575 | thistype = baseclass; | |
576 | base_valaddr = value_contents_for_printing_const (base_val); | |
d5161074 | 577 | do_cleanups (back_to); |
8af8e3bc PA |
578 | } |
579 | else | |
580 | { | |
581 | base_valaddr = valaddr; | |
582 | base_val = val; | |
583 | } | |
c5aa993b JM |
584 | } |
585 | else | |
de4127a3 PA |
586 | { |
587 | base_valaddr = valaddr; | |
588 | base_val = val; | |
589 | } | |
c906108c SS |
590 | } |
591 | ||
aff410f1 | 592 | /* Now do the printing. */ |
79a45b7d | 593 | if (options->pretty) |
c906108c SS |
594 | { |
595 | fprintf_filtered (stream, "\n"); | |
596 | print_spaces_filtered (2 * recurse, stream); | |
597 | } | |
598 | fputs_filtered ("<", stream); | |
aff410f1 MS |
599 | /* Not sure what the best notation is in the case where there is |
600 | no baseclass name. */ | |
c906108c SS |
601 | fputs_filtered (basename ? basename : "", stream); |
602 | fputs_filtered ("> = ", stream); | |
603 | ||
8af8e3bc PA |
604 | if (skip < 0) |
605 | val_print_unavailable (stream); | |
606 | else if (skip > 0) | |
607 | val_print_invalid_address (stream); | |
c906108c | 608 | else |
a6bac58e TT |
609 | { |
610 | int result = 0; | |
611 | ||
612 | /* Attempt to run the Python pretty-printers on the | |
613 | baseclass if possible. */ | |
614 | if (!options->raw) | |
615 | result = apply_val_pretty_printer (baseclass, base_valaddr, | |
616 | thisoffset + boffset, | |
de4127a3 PA |
617 | value_address (base_val), |
618 | stream, recurse, base_val, | |
619 | options, current_language); | |
620 | ||
621 | ||
a6bac58e TT |
622 | |
623 | if (!result) | |
624 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
625 | thisoffset + boffset, |
626 | value_address (base_val), | |
627 | stream, recurse, base_val, options, | |
a6bac58e TT |
628 | ((struct type **) |
629 | obstack_base (&dont_print_vb_obstack)), | |
630 | 0); | |
631 | } | |
c906108c SS |
632 | fputs_filtered (", ", stream); |
633 | ||
634 | flush_it: | |
635 | ; | |
636 | } | |
637 | ||
638 | if (dont_print_vb == 0) | |
639 | { | |
640 | /* Free the space used to deal with the printing | |
c5aa993b | 641 | of this type from top level. */ |
c906108c SS |
642 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
643 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 644 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
645 | dont_print_vb_obstack = tmp_obstack; |
646 | } | |
647 | } | |
648 | ||
aff410f1 MS |
649 | /* Print value of a static member. To avoid infinite recursion when |
650 | printing a class that contains a static instance of the class, we | |
651 | keep the addresses of all printed static member classes in an | |
652 | obstack and refuse to print them more than once. | |
c906108c | 653 | |
79a45b7d | 654 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
655 | have the same meanings as in c_val_print. */ |
656 | ||
657 | static void | |
2c63a960 | 658 | cp_print_static_field (struct type *type, |
6943961c | 659 | struct value *val, |
2c63a960 | 660 | struct ui_file *stream, |
2c63a960 | 661 | int recurse, |
79a45b7d | 662 | const struct value_print_options *options) |
c906108c | 663 | { |
79a45b7d | 664 | struct value_print_options opts; |
ec31cde5 | 665 | |
c906108c SS |
666 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
667 | { | |
668 | CORE_ADDR *first_dont_print; | |
42ae5230 | 669 | CORE_ADDR addr; |
c906108c SS |
670 | int i; |
671 | ||
672 | first_dont_print | |
c5aa993b | 673 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
674 | i = obstack_object_size (&dont_print_statmem_obstack) |
675 | / sizeof (CORE_ADDR); | |
c906108c SS |
676 | |
677 | while (--i >= 0) | |
678 | { | |
42ae5230 | 679 | if (value_address (val) == first_dont_print[i]) |
c906108c | 680 | { |
2c63a960 JB |
681 | fputs_filtered ("<same as static member of an already" |
682 | " seen type>", | |
c906108c SS |
683 | stream); |
684 | return; | |
685 | } | |
686 | } | |
687 | ||
42ae5230 TT |
688 | addr = value_address (val); |
689 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 690 | sizeof (CORE_ADDR)); |
c906108c | 691 | CHECK_TYPEDEF (type); |
edf3d5f3 | 692 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 693 | value_contents_for_printing (val), |
42ae5230 | 694 | value_embedded_offset (val), addr, |
aff410f1 MS |
695 | stream, recurse, val, |
696 | options, NULL, 1); | |
c906108c SS |
697 | return; |
698 | } | |
79a45b7d | 699 | |
ec31cde5 CM |
700 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
701 | { | |
702 | struct type **first_dont_print; | |
703 | int i; | |
704 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
705 | ||
706 | first_dont_print | |
707 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
708 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 709 | / sizeof (struct type *); |
ec31cde5 CM |
710 | |
711 | while (--i >= 0) | |
712 | { | |
713 | if (target_type == first_dont_print[i]) | |
714 | { | |
715 | fputs_filtered ("<same as static member of an already" | |
716 | " seen type>", | |
717 | stream); | |
718 | return; | |
719 | } | |
720 | } | |
721 | ||
aff410f1 MS |
722 | obstack_grow (&dont_print_stat_array_obstack, |
723 | (char *) &target_type, | |
ec31cde5 CM |
724 | sizeof (struct type *)); |
725 | } | |
726 | ||
79a45b7d TT |
727 | opts = *options; |
728 | opts.deref_ref = 0; | |
0e03807e | 729 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
730 | value_embedded_offset (val), |
731 | value_address (val), | |
732 | stream, recurse, val, | |
733 | &opts, current_language); | |
c906108c SS |
734 | } |
735 | ||
0d5de010 | 736 | |
aff410f1 MS |
737 | /* Find the field in *DOMAIN, or its non-virtual base classes, with |
738 | bit offset OFFSET. Set *DOMAIN to the containing type and *FIELDNO | |
739 | to the containing field number. If OFFSET is not exactly at the | |
740 | start of some field, set *DOMAIN to NULL. */ | |
0d5de010 | 741 | |
2c0b251b | 742 | static void |
0d5de010 DJ |
743 | cp_find_class_member (struct type **domain_p, int *fieldno, |
744 | LONGEST offset) | |
745 | { | |
746 | struct type *domain; | |
747 | unsigned int i; | |
748 | unsigned len; | |
749 | ||
750 | *domain_p = check_typedef (*domain_p); | |
751 | domain = *domain_p; | |
752 | len = TYPE_NFIELDS (domain); | |
753 | ||
754 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
755 | { | |
756 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
757 | ||
758 | QUIT; | |
759 | if (offset == bitpos) | |
760 | { | |
761 | *fieldno = i; | |
762 | return; | |
763 | } | |
764 | } | |
765 | ||
766 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
767 | { | |
768 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
769 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
770 | ||
771 | if (offset >= bitpos && offset < bitpos + bitsize) | |
772 | { | |
773 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
774 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
775 | return; | |
776 | } | |
777 | } | |
778 | ||
779 | *domain_p = NULL; | |
780 | } | |
781 | ||
c906108c | 782 | void |
ad4820ab | 783 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 784 | struct ui_file *stream, char *prefix) |
c906108c | 785 | { |
e17a4113 UW |
786 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
787 | ||
c906108c SS |
788 | /* VAL is a byte offset into the structure type DOMAIN. |
789 | Find the name of the field for that offset and | |
790 | print it. */ | |
ad4820ab | 791 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 792 | LONGEST val; |
0d5de010 | 793 | unsigned int fieldno; |
c906108c | 794 | |
aff410f1 MS |
795 | val = extract_signed_integer (valaddr, |
796 | TYPE_LENGTH (type), | |
797 | byte_order); | |
e17a4113 | 798 | |
0d5de010 DJ |
799 | /* Pointers to data members are usually byte offsets into an object. |
800 | Because a data member can have offset zero, and a NULL pointer to | |
801 | member must be distinct from any valid non-NULL pointer to | |
802 | member, either the value is biased or the NULL value has a | |
803 | special representation; both are permitted by ISO C++. HP aCC | |
804 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
805 | and other compilers which use the Itanium ABI use -1 as the NULL | |
806 | value. GDB only supports that last form; to add support for | |
807 | another form, make this into a cp-abi hook. */ | |
c906108c | 808 | |
0d5de010 | 809 | if (val == -1) |
c906108c | 810 | { |
0d5de010 DJ |
811 | fprintf_filtered (stream, "NULL"); |
812 | return; | |
c906108c | 813 | } |
0d5de010 DJ |
814 | |
815 | cp_find_class_member (&domain, &fieldno, val << 3); | |
816 | ||
817 | if (domain != NULL) | |
c906108c | 818 | { |
0d5cff50 | 819 | const char *name; |
c5504eaf | 820 | |
306d9ac5 | 821 | fputs_filtered (prefix, stream); |
c906108c SS |
822 | name = type_name_no_tag (domain); |
823 | if (name) | |
c5aa993b | 824 | fputs_filtered (name, stream); |
c906108c | 825 | else |
79d43c61 | 826 | c_type_print_base (domain, stream, 0, 0, &type_print_raw_options); |
c906108c | 827 | fprintf_filtered (stream, "::"); |
0d5de010 | 828 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
829 | } |
830 | else | |
0d5de010 | 831 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
832 | } |
833 | ||
834 | ||
c906108c | 835 | void |
fba45db2 | 836 | _initialize_cp_valprint (void) |
c906108c | 837 | { |
5bf193a2 | 838 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 839 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
840 | Set printing of C++ static members."), _("\ |
841 | Show printing of C++ static members."), NULL, | |
842 | NULL, | |
920d2a44 | 843 | show_static_field_print, |
5bf193a2 | 844 | &setprintlist, &showprintlist); |
c906108c | 845 | |
79a45b7d TT |
846 | add_setshow_boolean_cmd ("vtbl", class_support, |
847 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
848 | Set printing of C++ virtual function tables."), _("\ |
849 | Show printing of C++ virtual function tables."), NULL, | |
850 | NULL, | |
920d2a44 | 851 | show_vtblprint, |
5bf193a2 AC |
852 | &setprintlist, &showprintlist); |
853 | ||
79a45b7d TT |
854 | add_setshow_boolean_cmd ("object", class_support, |
855 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
856 | Set printing of object's derived type based on vtable info."), _("\ |
857 | Show printing of object's derived type based on vtable info."), NULL, | |
858 | NULL, | |
920d2a44 | 859 | show_objectprint, |
5bf193a2 | 860 | &setprintlist, &showprintlist); |
c906108c | 861 | |
aff410f1 MS |
862 | obstack_begin (&dont_print_stat_array_obstack, |
863 | 32 * sizeof (struct type *)); | |
864 | obstack_begin (&dont_print_statmem_obstack, | |
865 | 32 * sizeof (CORE_ADDR)); | |
866 | obstack_begin (&dont_print_vb_obstack, | |
867 | 32 * sizeof (struct type *)); | |
c906108c | 868 | } |