Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
ecd75fc8 | 3 | Copyright (C) 1986-2014 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
04ea0df1 | 21 | #include "gdb_obstack.h" |
c906108c SS |
22 | #include "symtab.h" |
23 | #include "gdbtypes.h" | |
24 | #include "expression.h" | |
25 | #include "value.h" | |
26 | #include "command.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "demangle.h" | |
29 | #include "annotate.h" | |
c906108c SS |
30 | #include "c-lang.h" |
31 | #include "target.h" | |
b9d652ac | 32 | #include "cp-abi.h" |
973177d3 | 33 | #include "valprint.h" |
d3cbe7ef | 34 | #include "cp-support.h" |
cf309262 | 35 | #include "language.h" |
6dddc817 | 36 | #include "extension.h" |
8af8e3bc | 37 | #include "exceptions.h" |
79d43c61 | 38 | #include "typeprint.h" |
c906108c | 39 | |
aff410f1 | 40 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
41 | static void |
42 | show_vtblprint (struct ui_file *file, int from_tty, | |
43 | struct cmd_list_element *c, const char *value) | |
44 | { | |
45 | fprintf_filtered (file, _("\ | |
46 | Printing of C++ virtual function tables is %s.\n"), | |
47 | value); | |
48 | } | |
49 | ||
50 | /* Controls looking up an object's derived type using what we find in | |
51 | its vtables. */ | |
920d2a44 AC |
52 | static void |
53 | show_objectprint (struct ui_file *file, int from_tty, | |
54 | struct cmd_list_element *c, | |
55 | const char *value) | |
56 | { | |
57 | fprintf_filtered (file, _("\ | |
58 | Printing of object's derived type based on vtable info is %s.\n"), | |
59 | value); | |
60 | } | |
61 | ||
920d2a44 AC |
62 | static void |
63 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
64 | struct cmd_list_element *c, |
65 | const char *value) | |
920d2a44 | 66 | { |
aff410f1 MS |
67 | fprintf_filtered (file, |
68 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
69 | value); |
70 | } | |
71 | ||
c906108c SS |
72 | |
73 | static struct obstack dont_print_vb_obstack; | |
74 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 75 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 76 | |
a14ed312 | 77 | extern void _initialize_cp_valprint (void); |
392a587b | 78 | |
6943961c | 79 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
80 | struct ui_file *, int, |
81 | const struct value_print_options *); | |
c906108c | 82 | |
aff410f1 MS |
83 | static void cp_print_value (struct type *, struct type *, |
84 | const gdb_byte *, int, | |
85 | CORE_ADDR, struct ui_file *, | |
86 | int, const struct value *, | |
87 | const struct value_print_options *, | |
88 | struct type **); | |
c906108c | 89 | |
c906108c | 90 | |
8343f86c | 91 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 92 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 93 | |
c906108c SS |
94 | /* Return truth value for assertion that TYPE is of the type |
95 | "pointer to virtual function". */ | |
96 | ||
97 | int | |
fba45db2 | 98 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 99 | { |
0d5cff50 | 100 | const char *typename = type_name_no_tag (type); |
c906108c | 101 | |
8343f86c | 102 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
103 | } |
104 | ||
105 | /* Return truth value for the assertion that TYPE is of the type | |
106 | "pointer to virtual function table". */ | |
107 | ||
108 | int | |
fba45db2 | 109 | cp_is_vtbl_member (struct type *type) |
c906108c | 110 | { |
aff410f1 MS |
111 | /* With older versions of g++, the vtbl field pointed to an array of |
112 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
113 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
114 | { | |
115 | type = TYPE_TARGET_TYPE (type); | |
116 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
117 | { | |
118 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
119 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
120 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
121 | { |
122 | /* Virtual functions tables are full of pointers | |
aff410f1 | 123 | to virtual functions. */ |
c906108c SS |
124 | return cp_is_vtbl_ptr_type (type); |
125 | } | |
126 | } | |
0e5e3ea6 PS |
127 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
128 | { | |
129 | return cp_is_vtbl_ptr_type (type); | |
130 | } | |
131 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
132 | { | |
aff410f1 MS |
133 | /* The type name of the thunk pointer is NULL when using |
134 | dwarf2. We could test for a pointer to a function, but | |
135 | there is no type info for the virtual table either, so it | |
136 | wont help. */ | |
0e5e3ea6 PS |
137 | return cp_is_vtbl_ptr_type (type); |
138 | } | |
c906108c SS |
139 | } |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
144 | print out a structure's fields: cp_print_value_fields and |
145 | cp_print_value. | |
c5aa993b | 146 | |
aff410f1 MS |
147 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
148 | meanings as in cp_print_value and c_val_print. | |
c906108c | 149 | |
aff410f1 MS |
150 | 2nd argument REAL_TYPE is used to carry over the type of the |
151 | derived class across the recursion to base classes. | |
c906108c | 152 | |
aff410f1 MS |
153 | DONT_PRINT is an array of baseclass types that we should not print, |
154 | or zero if called from top level. */ | |
c906108c SS |
155 | |
156 | void | |
a2bd3dcd | 157 | cp_print_value_fields (struct type *type, struct type *real_type, |
aff410f1 MS |
158 | const gdb_byte *valaddr, int offset, |
159 | CORE_ADDR address, struct ui_file *stream, | |
160 | int recurse, const struct value *val, | |
79a45b7d | 161 | const struct value_print_options *options, |
aff410f1 MS |
162 | struct type **dont_print_vb, |
163 | int dont_print_statmem) | |
c906108c SS |
164 | { |
165 | int i, len, n_baseclasses; | |
c906108c | 166 | int fields_seen = 0; |
ec31cde5 | 167 | static int last_set_recurse = -1; |
c906108c SS |
168 | |
169 | CHECK_TYPEDEF (type); | |
99903ae3 | 170 | |
ec31cde5 CM |
171 | if (recurse == 0) |
172 | { | |
aff410f1 MS |
173 | /* Any object can be left on obstacks only during an unexpected |
174 | error. */ | |
6036c742 | 175 | |
ec31cde5 | 176 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
177 | { |
178 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
179 | obstack_begin (&dont_print_statmem_obstack, |
180 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 181 | } |
ec31cde5 | 182 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
183 | { |
184 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
185 | obstack_begin (&dont_print_stat_array_obstack, | |
186 | 32 * sizeof (struct type *)); | |
187 | } | |
ec31cde5 | 188 | } |
c906108c SS |
189 | |
190 | fprintf_filtered (stream, "{"); | |
191 | len = TYPE_NFIELDS (type); | |
192 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
193 | ||
194 | /* First, print out baseclasses such that we don't print | |
195 | duplicates of virtual baseclasses. */ | |
196 | ||
197 | if (n_baseclasses > 0) | |
aff410f1 MS |
198 | cp_print_value (type, real_type, valaddr, |
199 | offset, address, stream, | |
200 | recurse + 1, val, options, | |
201 | dont_print_vb); | |
c906108c SS |
202 | |
203 | /* Second, print out data fields */ | |
204 | ||
086280be UW |
205 | /* If there are no data fields, skip this part */ |
206 | if (len == n_baseclasses || !len) | |
c906108c SS |
207 | fprintf_filtered (stream, "<No data fields>"); |
208 | else | |
209 | { | |
241fd515 AM |
210 | size_t statmem_obstack_initial_size = 0; |
211 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
212 | struct type *vptr_basetype = NULL; |
213 | int vptr_fieldno; | |
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 | ||
7977e5d2 | 229 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
230 | for (i = n_baseclasses; i < len; i++) |
231 | { | |
232 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 233 | if (!options->static_field_print |
d6a843b5 | 234 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
235 | continue; |
236 | ||
c906108c SS |
237 | if (fields_seen) |
238 | fprintf_filtered (stream, ", "); | |
239 | else if (n_baseclasses > 0) | |
240 | { | |
2a998fc0 | 241 | if (options->prettyformat) |
c906108c SS |
242 | { |
243 | fprintf_filtered (stream, "\n"); | |
244 | print_spaces_filtered (2 + 2 * recurse, stream); | |
245 | fputs_filtered ("members of ", stream); | |
246 | fputs_filtered (type_name_no_tag (type), stream); | |
247 | fputs_filtered (": ", stream); | |
248 | } | |
249 | } | |
250 | fields_seen = 1; | |
251 | ||
2a998fc0 | 252 | if (options->prettyformat) |
c906108c SS |
253 | { |
254 | fprintf_filtered (stream, "\n"); | |
255 | print_spaces_filtered (2 + 2 * recurse, stream); | |
256 | } | |
c5aa993b | 257 | else |
c906108c SS |
258 | { |
259 | wrap_here (n_spaces (2 + 2 * recurse)); | |
260 | } | |
e93a8774 TT |
261 | |
262 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
263 | ||
264 | if (field_is_static (&TYPE_FIELD (type, i))) | |
265 | fputs_filtered ("static ", stream); | |
266 | fprintf_symbol_filtered (stream, | |
267 | TYPE_FIELD_NAME (type, i), | |
268 | current_language->la_language, | |
269 | DMGL_PARAMS | DMGL_ANSI); | |
270 | annotate_field_name_end (); | |
271 | /* Do not print leading '=' in case of anonymous | |
272 | unions. */ | |
273 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
274 | fputs_filtered (" = ", stream); | |
275 | annotate_field_value (); | |
c906108c | 276 | |
d6a843b5 JK |
277 | if (!field_is_static (&TYPE_FIELD (type, i)) |
278 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 279 | { |
6943961c | 280 | struct value *v; |
c906108c | 281 | |
aff410f1 MS |
282 | /* Bitfields require special handling, especially due to |
283 | byte order problems. */ | |
c906108c SS |
284 | if (TYPE_FIELD_IGNORE (type, i)) |
285 | { | |
c5aa993b | 286 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 287 | } |
8cf6f0b1 TT |
288 | else if (value_bits_synthetic_pointer (val, |
289 | TYPE_FIELD_BITPOS (type, | |
290 | i), | |
291 | TYPE_FIELD_BITSIZE (type, | |
292 | i))) | |
293 | { | |
294 | fputs_filtered (_("<synthetic pointer>"), stream); | |
295 | } | |
c906108c SS |
296 | else |
297 | { | |
79a45b7d | 298 | struct value_print_options opts = *options; |
c5504eaf | 299 | |
79a45b7d | 300 | opts.deref_ref = 0; |
5467c6c8 PA |
301 | |
302 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 303 | |
79a45b7d | 304 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 305 | current_language); |
c906108c SS |
306 | } |
307 | } | |
308 | else | |
309 | { | |
310 | if (TYPE_FIELD_IGNORE (type, i)) | |
311 | { | |
aff410f1 MS |
312 | fputs_filtered ("<optimized out or zero length>", |
313 | stream); | |
c906108c | 314 | } |
d6a843b5 | 315 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 316 | { |
ee86786c TT |
317 | volatile struct gdb_exception ex; |
318 | struct value *v = NULL; | |
319 | ||
320 | TRY_CATCH (ex, RETURN_MASK_ERROR) | |
321 | { | |
322 | v = value_static_field (type, i); | |
323 | } | |
324 | ||
325 | if (ex.reason < 0) | |
326 | fprintf_filtered (stream, | |
327 | _("<error reading variable: %s>"), | |
328 | ex.message); | |
686d4def PA |
329 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
330 | v, stream, recurse + 1, | |
331 | options); | |
c906108c | 332 | } |
7977e5d2 | 333 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 334 | { |
a72c8f6a JK |
335 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
336 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
337 | ||
338 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
339 | { | |
340 | CORE_ADDR addr; | |
341 | ||
342 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
343 | print_function_pointer_address (options, |
344 | get_type_arch (type), | |
345 | addr, stream); | |
a72c8f6a | 346 | } |
410528f0 | 347 | } |
c906108c SS |
348 | else |
349 | { | |
79a45b7d | 350 | struct value_print_options opts = *options; |
c5504eaf | 351 | |
79a45b7d | 352 | opts.deref_ref = 0; |
c5aa993b | 353 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
354 | valaddr, |
355 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 356 | address, |
0e03807e | 357 | stream, recurse + 1, val, &opts, |
d8ca156b | 358 | current_language); |
c906108c SS |
359 | } |
360 | } | |
361 | annotate_field_end (); | |
362 | } | |
363 | ||
364 | if (dont_print_statmem == 0) | |
365 | { | |
241fd515 | 366 | size_t obstack_final_size = |
0b66f317 CM |
367 | obstack_object_size (&dont_print_statmem_obstack); |
368 | ||
aff410f1 MS |
369 | if (obstack_final_size > statmem_obstack_initial_size) |
370 | { | |
371 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 372 | |
aff410f1 MS |
373 | void *free_to_ptr = |
374 | obstack_next_free (&dont_print_statmem_obstack) - | |
375 | (obstack_final_size - statmem_obstack_initial_size); | |
0b66f317 | 376 | |
aff410f1 MS |
377 | obstack_free (&dont_print_statmem_obstack, |
378 | free_to_ptr); | |
379 | } | |
ec31cde5 CM |
380 | |
381 | if (last_set_recurse != recurse) | |
382 | { | |
241fd515 | 383 | size_t obstack_final_size = |
f56dcb88 CM |
384 | obstack_object_size (&dont_print_stat_array_obstack); |
385 | ||
386 | if (obstack_final_size > stat_array_obstack_initial_size) | |
387 | { | |
388 | void *free_to_ptr = | |
aff410f1 MS |
389 | obstack_next_free (&dont_print_stat_array_obstack) |
390 | - (obstack_final_size | |
391 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
392 | |
393 | obstack_free (&dont_print_stat_array_obstack, | |
394 | free_to_ptr); | |
395 | } | |
ec31cde5 CM |
396 | last_set_recurse = -1; |
397 | } | |
c906108c SS |
398 | } |
399 | ||
2a998fc0 | 400 | if (options->prettyformat) |
c906108c SS |
401 | { |
402 | fprintf_filtered (stream, "\n"); | |
403 | print_spaces_filtered (2 * recurse, stream); | |
404 | } | |
c5aa993b | 405 | } /* if there are data fields */ |
c5aa993b | 406 | |
c906108c SS |
407 | fprintf_filtered (stream, "}"); |
408 | } | |
409 | ||
edf3d5f3 TT |
410 | /* Like cp_print_value_fields, but find the runtime type of the object |
411 | and pass it as the `real_type' argument to cp_print_value_fields. | |
412 | This function is a hack to work around the fact that | |
413 | common_val_print passes the embedded offset to val_print, but not | |
414 | the enclosing type. */ | |
415 | ||
416 | void | |
417 | cp_print_value_fields_rtti (struct type *type, | |
418 | const gdb_byte *valaddr, int offset, | |
419 | CORE_ADDR address, | |
420 | struct ui_file *stream, int recurse, | |
0e03807e | 421 | const struct value *val, |
edf3d5f3 | 422 | const struct value_print_options *options, |
c5504eaf MS |
423 | struct type **dont_print_vb, |
424 | int dont_print_statmem) | |
edf3d5f3 | 425 | { |
0e03807e TT |
426 | struct type *real_type = NULL; |
427 | ||
428 | /* We require all bits to be valid in order to attempt a | |
429 | conversion. */ | |
9a0dc9e3 PA |
430 | if (!value_bits_any_optimized_out (val, |
431 | TARGET_CHAR_BIT * offset, | |
432 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
433 | { |
434 | struct value *value; | |
435 | int full, top, using_enc; | |
436 | ||
437 | /* Ugh, we have to convert back to a value here. */ | |
438 | value = value_from_contents_and_address (type, valaddr + offset, | |
439 | address + offset); | |
9f1f738a | 440 | type = value_type (value); |
aff410f1 MS |
441 | /* We don't actually care about most of the result here -- just |
442 | the type. We already have the correct offset, due to how | |
443 | val_print was initially called. */ | |
0e03807e TT |
444 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
445 | } | |
446 | ||
edf3d5f3 TT |
447 | if (!real_type) |
448 | real_type = type; | |
449 | ||
450 | cp_print_value_fields (type, real_type, valaddr, offset, | |
0e03807e | 451 | address, stream, recurse, val, options, |
edf3d5f3 TT |
452 | dont_print_vb, dont_print_statmem); |
453 | } | |
454 | ||
aff410f1 MS |
455 | /* Special val_print routine to avoid printing multiple copies of |
456 | virtual baseclasses. */ | |
c906108c SS |
457 | |
458 | static void | |
a2bd3dcd | 459 | cp_print_value (struct type *type, struct type *real_type, |
aff410f1 MS |
460 | const gdb_byte *valaddr, int offset, |
461 | CORE_ADDR address, struct ui_file *stream, | |
462 | int recurse, const struct value *val, | |
79a45b7d TT |
463 | const struct value_print_options *options, |
464 | struct type **dont_print_vb) | |
c906108c | 465 | { |
c906108c | 466 | struct type **last_dont_print |
2c63a960 | 467 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 468 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 469 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
470 | int thisoffset; |
471 | struct type *thistype; | |
c906108c SS |
472 | |
473 | if (dont_print_vb == 0) | |
474 | { | |
aff410f1 MS |
475 | /* If we're at top level, carve out a completely fresh chunk of |
476 | the obstack and use that until this particular invocation | |
477 | returns. */ | |
c906108c SS |
478 | /* Bump up the high-water mark. Now alpha is omega. */ |
479 | obstack_finish (&dont_print_vb_obstack); | |
480 | } | |
481 | ||
482 | for (i = 0; i < n_baseclasses; i++) | |
483 | { | |
8af8e3bc | 484 | int boffset = 0; |
c906108c SS |
485 | int skip; |
486 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
0d5cff50 | 487 | const char *basename = TYPE_NAME (baseclass); |
8af8e3bc PA |
488 | const gdb_byte *base_valaddr = NULL; |
489 | const struct value *base_val = NULL; | |
490 | volatile struct gdb_exception ex; | |
c906108c SS |
491 | |
492 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
493 | { | |
494 | struct type **first_dont_print | |
2c63a960 | 495 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 496 | |
aff410f1 MS |
497 | int j = (struct type **) |
498 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
499 | |
500 | while (--j >= 0) | |
501 | if (baseclass == first_dont_print[j]) | |
502 | goto flush_it; | |
503 | ||
504 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
505 | } | |
506 | ||
b9d652ac DJ |
507 | thisoffset = offset; |
508 | thistype = real_type; | |
086280be | 509 | |
8af8e3bc | 510 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
c5aa993b | 511 | { |
8af8e3bc PA |
512 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
513 | } | |
514 | if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR) | |
515 | skip = -1; | |
516 | else if (ex.reason < 0) | |
517 | skip = 1; | |
518 | else | |
519 | { | |
520 | skip = 0; | |
c906108c | 521 | |
8af8e3bc | 522 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 523 | { |
8af8e3bc PA |
524 | /* The virtual base class pointer might have been |
525 | clobbered by the user program. Make sure that it | |
526 | still points to a valid memory location. */ | |
527 | ||
528 | if ((boffset + offset) < 0 | |
529 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
530 | { | |
d5161074 SP |
531 | gdb_byte *buf; |
532 | struct cleanup *back_to; | |
533 | ||
534 | buf = xmalloc (TYPE_LENGTH (baseclass)); | |
535 | back_to = make_cleanup (xfree, buf); | |
8af8e3bc PA |
536 | |
537 | if (target_read_memory (address + boffset, buf, | |
538 | TYPE_LENGTH (baseclass)) != 0) | |
539 | skip = 1; | |
540 | base_val = value_from_contents_and_address (baseclass, | |
541 | buf, | |
542 | address + boffset); | |
9f1f738a | 543 | baseclass = value_type (base_val); |
8af8e3bc PA |
544 | thisoffset = 0; |
545 | boffset = 0; | |
546 | thistype = baseclass; | |
547 | base_valaddr = value_contents_for_printing_const (base_val); | |
d5161074 | 548 | do_cleanups (back_to); |
8af8e3bc PA |
549 | } |
550 | else | |
551 | { | |
552 | base_valaddr = valaddr; | |
553 | base_val = val; | |
554 | } | |
c5aa993b JM |
555 | } |
556 | else | |
de4127a3 PA |
557 | { |
558 | base_valaddr = valaddr; | |
559 | base_val = val; | |
560 | } | |
c906108c SS |
561 | } |
562 | ||
aff410f1 | 563 | /* Now do the printing. */ |
2a998fc0 | 564 | if (options->prettyformat) |
c906108c SS |
565 | { |
566 | fprintf_filtered (stream, "\n"); | |
567 | print_spaces_filtered (2 * recurse, stream); | |
568 | } | |
569 | fputs_filtered ("<", stream); | |
aff410f1 MS |
570 | /* Not sure what the best notation is in the case where there is |
571 | no baseclass name. */ | |
c906108c SS |
572 | fputs_filtered (basename ? basename : "", stream); |
573 | fputs_filtered ("> = ", stream); | |
574 | ||
8af8e3bc PA |
575 | if (skip < 0) |
576 | val_print_unavailable (stream); | |
577 | else if (skip > 0) | |
578 | val_print_invalid_address (stream); | |
c906108c | 579 | else |
a6bac58e TT |
580 | { |
581 | int result = 0; | |
582 | ||
6dddc817 | 583 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
584 | baseclass if possible. */ |
585 | if (!options->raw) | |
6dddc817 DE |
586 | result |
587 | = apply_ext_lang_val_pretty_printer (baseclass, base_valaddr, | |
588 | thisoffset + boffset, | |
589 | value_address (base_val), | |
590 | stream, recurse, | |
591 | base_val, options, | |
592 | current_language); | |
de4127a3 | 593 | |
a6bac58e TT |
594 | if (!result) |
595 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
596 | thisoffset + boffset, |
597 | value_address (base_val), | |
598 | stream, recurse, base_val, options, | |
a6bac58e TT |
599 | ((struct type **) |
600 | obstack_base (&dont_print_vb_obstack)), | |
601 | 0); | |
602 | } | |
c906108c SS |
603 | fputs_filtered (", ", stream); |
604 | ||
605 | flush_it: | |
606 | ; | |
607 | } | |
608 | ||
609 | if (dont_print_vb == 0) | |
610 | { | |
611 | /* Free the space used to deal with the printing | |
c5aa993b | 612 | of this type from top level. */ |
c906108c SS |
613 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
614 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 615 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
616 | dont_print_vb_obstack = tmp_obstack; |
617 | } | |
618 | } | |
619 | ||
aff410f1 MS |
620 | /* Print value of a static member. To avoid infinite recursion when |
621 | printing a class that contains a static instance of the class, we | |
622 | keep the addresses of all printed static member classes in an | |
623 | obstack and refuse to print them more than once. | |
c906108c | 624 | |
79a45b7d | 625 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
626 | have the same meanings as in c_val_print. */ |
627 | ||
628 | static void | |
2c63a960 | 629 | cp_print_static_field (struct type *type, |
6943961c | 630 | struct value *val, |
2c63a960 | 631 | struct ui_file *stream, |
2c63a960 | 632 | int recurse, |
79a45b7d | 633 | const struct value_print_options *options) |
c906108c | 634 | { |
79a45b7d | 635 | struct value_print_options opts; |
686d4def PA |
636 | |
637 | if (value_entirely_optimized_out (val)) | |
638 | { | |
639 | val_print_optimized_out (val, stream); | |
640 | return; | |
641 | } | |
642 | ||
c906108c SS |
643 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
644 | { | |
645 | CORE_ADDR *first_dont_print; | |
42ae5230 | 646 | CORE_ADDR addr; |
c906108c SS |
647 | int i; |
648 | ||
649 | first_dont_print | |
c5aa993b | 650 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
651 | i = obstack_object_size (&dont_print_statmem_obstack) |
652 | / sizeof (CORE_ADDR); | |
c906108c SS |
653 | |
654 | while (--i >= 0) | |
655 | { | |
42ae5230 | 656 | if (value_address (val) == first_dont_print[i]) |
c906108c | 657 | { |
2c63a960 JB |
658 | fputs_filtered ("<same as static member of an already" |
659 | " seen type>", | |
c906108c SS |
660 | stream); |
661 | return; | |
662 | } | |
663 | } | |
664 | ||
42ae5230 TT |
665 | addr = value_address (val); |
666 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 667 | sizeof (CORE_ADDR)); |
c906108c | 668 | CHECK_TYPEDEF (type); |
edf3d5f3 | 669 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 670 | value_contents_for_printing (val), |
42ae5230 | 671 | value_embedded_offset (val), addr, |
aff410f1 MS |
672 | stream, recurse, val, |
673 | options, NULL, 1); | |
c906108c SS |
674 | return; |
675 | } | |
79a45b7d | 676 | |
ec31cde5 CM |
677 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
678 | { | |
679 | struct type **first_dont_print; | |
680 | int i; | |
681 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
682 | ||
683 | first_dont_print | |
684 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
685 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 686 | / sizeof (struct type *); |
ec31cde5 CM |
687 | |
688 | while (--i >= 0) | |
689 | { | |
690 | if (target_type == first_dont_print[i]) | |
691 | { | |
692 | fputs_filtered ("<same as static member of an already" | |
693 | " seen type>", | |
694 | stream); | |
695 | return; | |
696 | } | |
697 | } | |
698 | ||
aff410f1 MS |
699 | obstack_grow (&dont_print_stat_array_obstack, |
700 | (char *) &target_type, | |
ec31cde5 CM |
701 | sizeof (struct type *)); |
702 | } | |
703 | ||
79a45b7d TT |
704 | opts = *options; |
705 | opts.deref_ref = 0; | |
0e03807e | 706 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
707 | value_embedded_offset (val), |
708 | value_address (val), | |
709 | stream, recurse, val, | |
710 | &opts, current_language); | |
c906108c SS |
711 | } |
712 | ||
0d5de010 | 713 | |
aff410f1 MS |
714 | /* Find the field in *DOMAIN, or its non-virtual base classes, with |
715 | bit offset OFFSET. Set *DOMAIN to the containing type and *FIELDNO | |
716 | to the containing field number. If OFFSET is not exactly at the | |
717 | start of some field, set *DOMAIN to NULL. */ | |
0d5de010 | 718 | |
2c0b251b | 719 | static void |
0d5de010 DJ |
720 | cp_find_class_member (struct type **domain_p, int *fieldno, |
721 | LONGEST offset) | |
722 | { | |
723 | struct type *domain; | |
724 | unsigned int i; | |
725 | unsigned len; | |
726 | ||
727 | *domain_p = check_typedef (*domain_p); | |
728 | domain = *domain_p; | |
729 | len = TYPE_NFIELDS (domain); | |
730 | ||
731 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
732 | { | |
733 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
734 | ||
735 | QUIT; | |
736 | if (offset == bitpos) | |
737 | { | |
738 | *fieldno = i; | |
739 | return; | |
740 | } | |
741 | } | |
742 | ||
743 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
744 | { | |
745 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
746 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
747 | ||
748 | if (offset >= bitpos && offset < bitpos + bitsize) | |
749 | { | |
750 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
751 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
752 | return; | |
753 | } | |
754 | } | |
755 | ||
756 | *domain_p = NULL; | |
757 | } | |
758 | ||
c906108c | 759 | void |
ad4820ab | 760 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 761 | struct ui_file *stream, char *prefix) |
c906108c | 762 | { |
e17a4113 UW |
763 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
764 | ||
c906108c SS |
765 | /* VAL is a byte offset into the structure type DOMAIN. |
766 | Find the name of the field for that offset and | |
767 | print it. */ | |
ad4820ab | 768 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 769 | LONGEST val; |
9f8afa72 | 770 | int fieldno; |
c906108c | 771 | |
aff410f1 MS |
772 | val = extract_signed_integer (valaddr, |
773 | TYPE_LENGTH (type), | |
774 | byte_order); | |
e17a4113 | 775 | |
0d5de010 DJ |
776 | /* Pointers to data members are usually byte offsets into an object. |
777 | Because a data member can have offset zero, and a NULL pointer to | |
778 | member must be distinct from any valid non-NULL pointer to | |
779 | member, either the value is biased or the NULL value has a | |
780 | special representation; both are permitted by ISO C++. HP aCC | |
781 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
782 | and other compilers which use the Itanium ABI use -1 as the NULL | |
783 | value. GDB only supports that last form; to add support for | |
784 | another form, make this into a cp-abi hook. */ | |
c906108c | 785 | |
0d5de010 | 786 | if (val == -1) |
c906108c | 787 | { |
0d5de010 DJ |
788 | fprintf_filtered (stream, "NULL"); |
789 | return; | |
c906108c | 790 | } |
0d5de010 DJ |
791 | |
792 | cp_find_class_member (&domain, &fieldno, val << 3); | |
793 | ||
794 | if (domain != NULL) | |
c906108c | 795 | { |
0d5cff50 | 796 | const char *name; |
c5504eaf | 797 | |
306d9ac5 | 798 | fputs_filtered (prefix, stream); |
c906108c SS |
799 | name = type_name_no_tag (domain); |
800 | if (name) | |
c5aa993b | 801 | fputs_filtered (name, stream); |
c906108c | 802 | else |
79d43c61 | 803 | c_type_print_base (domain, stream, 0, 0, &type_print_raw_options); |
c906108c | 804 | fprintf_filtered (stream, "::"); |
0d5de010 | 805 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
806 | } |
807 | else | |
0d5de010 | 808 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
809 | } |
810 | ||
811 | ||
c906108c | 812 | void |
fba45db2 | 813 | _initialize_cp_valprint (void) |
c906108c | 814 | { |
5bf193a2 | 815 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 816 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
817 | Set printing of C++ static members."), _("\ |
818 | Show printing of C++ static members."), NULL, | |
819 | NULL, | |
920d2a44 | 820 | show_static_field_print, |
5bf193a2 | 821 | &setprintlist, &showprintlist); |
c906108c | 822 | |
79a45b7d TT |
823 | add_setshow_boolean_cmd ("vtbl", class_support, |
824 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
825 | Set printing of C++ virtual function tables."), _("\ |
826 | Show printing of C++ virtual function tables."), NULL, | |
827 | NULL, | |
920d2a44 | 828 | show_vtblprint, |
5bf193a2 AC |
829 | &setprintlist, &showprintlist); |
830 | ||
79a45b7d TT |
831 | add_setshow_boolean_cmd ("object", class_support, |
832 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
833 | Set printing of object's derived type based on vtable info."), _("\ |
834 | Show printing of object's derived type based on vtable info."), NULL, | |
835 | NULL, | |
920d2a44 | 836 | show_objectprint, |
5bf193a2 | 837 | &setprintlist, &showprintlist); |
c906108c | 838 | |
aff410f1 MS |
839 | obstack_begin (&dont_print_stat_array_obstack, |
840 | 32 * sizeof (struct type *)); | |
841 | obstack_begin (&dont_print_statmem_obstack, | |
842 | 32 * sizeof (CORE_ADDR)); | |
843 | obstack_begin (&dont_print_vb_obstack, | |
844 | 32 * sizeof (struct type *)); | |
c906108c | 845 | } |