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" | |
0e9f083f | 30 | #include <string.h> |
c906108c SS |
31 | #include "c-lang.h" |
32 | #include "target.h" | |
b9d652ac | 33 | #include "cp-abi.h" |
973177d3 | 34 | #include "valprint.h" |
d3cbe7ef | 35 | #include "cp-support.h" |
cf309262 | 36 | #include "language.h" |
6dddc817 | 37 | #include "extension.h" |
8af8e3bc | 38 | #include "exceptions.h" |
79d43c61 | 39 | #include "typeprint.h" |
c906108c | 40 | |
aff410f1 | 41 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
42 | static void |
43 | show_vtblprint (struct ui_file *file, int from_tty, | |
44 | struct cmd_list_element *c, const char *value) | |
45 | { | |
46 | fprintf_filtered (file, _("\ | |
47 | Printing of C++ virtual function tables is %s.\n"), | |
48 | value); | |
49 | } | |
50 | ||
51 | /* Controls looking up an object's derived type using what we find in | |
52 | its vtables. */ | |
920d2a44 AC |
53 | static void |
54 | show_objectprint (struct ui_file *file, int from_tty, | |
55 | struct cmd_list_element *c, | |
56 | const char *value) | |
57 | { | |
58 | fprintf_filtered (file, _("\ | |
59 | Printing of object's derived type based on vtable info is %s.\n"), | |
60 | value); | |
61 | } | |
62 | ||
920d2a44 AC |
63 | static void |
64 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
65 | struct cmd_list_element *c, |
66 | const char *value) | |
920d2a44 | 67 | { |
aff410f1 MS |
68 | fprintf_filtered (file, |
69 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
70 | value); |
71 | } | |
72 | ||
c906108c SS |
73 | |
74 | static struct obstack dont_print_vb_obstack; | |
75 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 76 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 77 | |
a14ed312 | 78 | extern void _initialize_cp_valprint (void); |
392a587b | 79 | |
6943961c | 80 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
81 | struct ui_file *, int, |
82 | const struct value_print_options *); | |
c906108c | 83 | |
aff410f1 MS |
84 | static void cp_print_value (struct type *, struct type *, |
85 | const gdb_byte *, int, | |
86 | CORE_ADDR, struct ui_file *, | |
87 | int, const struct value *, | |
88 | const struct value_print_options *, | |
89 | struct type **); | |
c906108c | 90 | |
c906108c | 91 | |
8343f86c | 92 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 93 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 94 | |
c906108c SS |
95 | /* Return truth value for assertion that TYPE is of the type |
96 | "pointer to virtual function". */ | |
97 | ||
98 | int | |
fba45db2 | 99 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 100 | { |
0d5cff50 | 101 | const char *typename = type_name_no_tag (type); |
c906108c | 102 | |
8343f86c | 103 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
104 | } |
105 | ||
106 | /* Return truth value for the assertion that TYPE is of the type | |
107 | "pointer to virtual function table". */ | |
108 | ||
109 | int | |
fba45db2 | 110 | cp_is_vtbl_member (struct type *type) |
c906108c | 111 | { |
aff410f1 MS |
112 | /* With older versions of g++, the vtbl field pointed to an array of |
113 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
114 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
115 | { | |
116 | type = TYPE_TARGET_TYPE (type); | |
117 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
118 | { | |
119 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
120 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
121 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
122 | { |
123 | /* Virtual functions tables are full of pointers | |
aff410f1 | 124 | to virtual functions. */ |
c906108c SS |
125 | return cp_is_vtbl_ptr_type (type); |
126 | } | |
127 | } | |
0e5e3ea6 PS |
128 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
129 | { | |
130 | return cp_is_vtbl_ptr_type (type); | |
131 | } | |
132 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
133 | { | |
aff410f1 MS |
134 | /* The type name of the thunk pointer is NULL when using |
135 | dwarf2. We could test for a pointer to a function, but | |
136 | there is no type info for the virtual table either, so it | |
137 | wont help. */ | |
0e5e3ea6 PS |
138 | return cp_is_vtbl_ptr_type (type); |
139 | } | |
c906108c SS |
140 | } |
141 | return 0; | |
142 | } | |
143 | ||
144 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
145 | print out a structure's fields: cp_print_value_fields and |
146 | cp_print_value. | |
c5aa993b | 147 | |
aff410f1 MS |
148 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
149 | meanings as in cp_print_value and c_val_print. | |
c906108c | 150 | |
aff410f1 MS |
151 | 2nd argument REAL_TYPE is used to carry over the type of the |
152 | derived class across the recursion to base classes. | |
c906108c | 153 | |
aff410f1 MS |
154 | DONT_PRINT is an array of baseclass types that we should not print, |
155 | or zero if called from top level. */ | |
c906108c SS |
156 | |
157 | void | |
a2bd3dcd | 158 | cp_print_value_fields (struct type *type, struct type *real_type, |
aff410f1 MS |
159 | const gdb_byte *valaddr, int offset, |
160 | CORE_ADDR address, struct ui_file *stream, | |
161 | int recurse, const struct value *val, | |
79a45b7d | 162 | const struct value_print_options *options, |
aff410f1 MS |
163 | struct type **dont_print_vb, |
164 | int dont_print_statmem) | |
c906108c SS |
165 | { |
166 | int i, len, n_baseclasses; | |
c906108c | 167 | int fields_seen = 0; |
ec31cde5 | 168 | static int last_set_recurse = -1; |
c906108c SS |
169 | |
170 | CHECK_TYPEDEF (type); | |
99903ae3 | 171 | |
ec31cde5 CM |
172 | if (recurse == 0) |
173 | { | |
aff410f1 MS |
174 | /* Any object can be left on obstacks only during an unexpected |
175 | error. */ | |
6036c742 | 176 | |
ec31cde5 | 177 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
178 | { |
179 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
180 | obstack_begin (&dont_print_statmem_obstack, |
181 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 182 | } |
ec31cde5 | 183 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
184 | { |
185 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
186 | obstack_begin (&dont_print_stat_array_obstack, | |
187 | 32 * sizeof (struct type *)); | |
188 | } | |
ec31cde5 | 189 | } |
c906108c SS |
190 | |
191 | fprintf_filtered (stream, "{"); | |
192 | len = TYPE_NFIELDS (type); | |
193 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
194 | ||
195 | /* First, print out baseclasses such that we don't print | |
196 | duplicates of virtual baseclasses. */ | |
197 | ||
198 | if (n_baseclasses > 0) | |
aff410f1 MS |
199 | cp_print_value (type, real_type, valaddr, |
200 | offset, address, stream, | |
201 | recurse + 1, val, options, | |
202 | dont_print_vb); | |
c906108c SS |
203 | |
204 | /* Second, print out data fields */ | |
205 | ||
086280be UW |
206 | /* If there are no data fields, skip this part */ |
207 | if (len == n_baseclasses || !len) | |
c906108c SS |
208 | fprintf_filtered (stream, "<No data fields>"); |
209 | else | |
210 | { | |
f56dcb88 CM |
211 | int statmem_obstack_initial_size = 0; |
212 | int stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
213 | struct type *vptr_basetype = NULL; |
214 | int vptr_fieldno; | |
215 | ||
c906108c SS |
216 | if (dont_print_statmem == 0) |
217 | { | |
f56dcb88 | 218 | statmem_obstack_initial_size = |
0b66f317 | 219 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
220 | |
221 | if (last_set_recurse != recurse) | |
222 | { | |
f56dcb88 CM |
223 | stat_array_obstack_initial_size = |
224 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 225 | |
ec31cde5 CM |
226 | last_set_recurse = recurse; |
227 | } | |
c906108c SS |
228 | } |
229 | ||
7977e5d2 | 230 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
231 | for (i = n_baseclasses; i < len; i++) |
232 | { | |
233 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 234 | if (!options->static_field_print |
d6a843b5 | 235 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
236 | continue; |
237 | ||
c906108c SS |
238 | if (fields_seen) |
239 | fprintf_filtered (stream, ", "); | |
240 | else if (n_baseclasses > 0) | |
241 | { | |
2a998fc0 | 242 | if (options->prettyformat) |
c906108c SS |
243 | { |
244 | fprintf_filtered (stream, "\n"); | |
245 | print_spaces_filtered (2 + 2 * recurse, stream); | |
246 | fputs_filtered ("members of ", stream); | |
247 | fputs_filtered (type_name_no_tag (type), stream); | |
248 | fputs_filtered (": ", stream); | |
249 | } | |
250 | } | |
251 | fields_seen = 1; | |
252 | ||
2a998fc0 | 253 | if (options->prettyformat) |
c906108c SS |
254 | { |
255 | fprintf_filtered (stream, "\n"); | |
256 | print_spaces_filtered (2 + 2 * recurse, stream); | |
257 | } | |
c5aa993b | 258 | else |
c906108c SS |
259 | { |
260 | wrap_here (n_spaces (2 + 2 * recurse)); | |
261 | } | |
e93a8774 TT |
262 | |
263 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
264 | ||
265 | if (field_is_static (&TYPE_FIELD (type, i))) | |
266 | fputs_filtered ("static ", stream); | |
267 | fprintf_symbol_filtered (stream, | |
268 | TYPE_FIELD_NAME (type, i), | |
269 | current_language->la_language, | |
270 | DMGL_PARAMS | DMGL_ANSI); | |
271 | annotate_field_name_end (); | |
272 | /* Do not print leading '=' in case of anonymous | |
273 | unions. */ | |
274 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
275 | fputs_filtered (" = ", stream); | |
276 | annotate_field_value (); | |
c906108c | 277 | |
d6a843b5 JK |
278 | if (!field_is_static (&TYPE_FIELD (type, i)) |
279 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 280 | { |
6943961c | 281 | struct value *v; |
c906108c | 282 | |
aff410f1 MS |
283 | /* Bitfields require special handling, especially due to |
284 | byte order problems. */ | |
c906108c SS |
285 | if (TYPE_FIELD_IGNORE (type, i)) |
286 | { | |
c5aa993b | 287 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 288 | } |
8cf6f0b1 TT |
289 | else if (value_bits_synthetic_pointer (val, |
290 | TYPE_FIELD_BITPOS (type, | |
291 | i), | |
292 | TYPE_FIELD_BITSIZE (type, | |
293 | i))) | |
294 | { | |
295 | fputs_filtered (_("<synthetic pointer>"), stream); | |
296 | } | |
aff410f1 MS |
297 | else if (!value_bits_valid (val, |
298 | TYPE_FIELD_BITPOS (type, i), | |
0e03807e TT |
299 | TYPE_FIELD_BITSIZE (type, i))) |
300 | { | |
901461f8 | 301 | val_print_optimized_out (val, stream); |
0e03807e | 302 | } |
c906108c SS |
303 | else |
304 | { | |
79a45b7d | 305 | struct value_print_options opts = *options; |
c5504eaf | 306 | |
79a45b7d | 307 | opts.deref_ref = 0; |
5467c6c8 PA |
308 | |
309 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 310 | |
79a45b7d | 311 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 312 | current_language); |
c906108c SS |
313 | } |
314 | } | |
315 | else | |
316 | { | |
317 | if (TYPE_FIELD_IGNORE (type, i)) | |
318 | { | |
aff410f1 MS |
319 | fputs_filtered ("<optimized out or zero length>", |
320 | stream); | |
c906108c | 321 | } |
d6a843b5 | 322 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 323 | { |
ee86786c TT |
324 | volatile struct gdb_exception ex; |
325 | struct value *v = NULL; | |
326 | ||
327 | TRY_CATCH (ex, RETURN_MASK_ERROR) | |
328 | { | |
329 | v = value_static_field (type, i); | |
330 | } | |
331 | ||
332 | if (ex.reason < 0) | |
333 | fprintf_filtered (stream, | |
334 | _("<error reading variable: %s>"), | |
335 | ex.message); | |
686d4def PA |
336 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
337 | v, stream, recurse + 1, | |
338 | options); | |
c906108c | 339 | } |
7977e5d2 | 340 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 341 | { |
a72c8f6a JK |
342 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
343 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
344 | ||
345 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
346 | { | |
347 | CORE_ADDR addr; | |
348 | ||
349 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
350 | print_function_pointer_address (options, |
351 | get_type_arch (type), | |
352 | addr, stream); | |
a72c8f6a | 353 | } |
410528f0 | 354 | } |
c906108c SS |
355 | else |
356 | { | |
79a45b7d | 357 | struct value_print_options opts = *options; |
c5504eaf | 358 | |
79a45b7d | 359 | opts.deref_ref = 0; |
c5aa993b | 360 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 MS |
361 | valaddr, |
362 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
edf3d5f3 | 363 | address, |
0e03807e | 364 | stream, recurse + 1, val, &opts, |
d8ca156b | 365 | current_language); |
c906108c SS |
366 | } |
367 | } | |
368 | annotate_field_end (); | |
369 | } | |
370 | ||
371 | if (dont_print_statmem == 0) | |
372 | { | |
0b66f317 CM |
373 | int obstack_final_size = |
374 | obstack_object_size (&dont_print_statmem_obstack); | |
375 | ||
aff410f1 MS |
376 | if (obstack_final_size > statmem_obstack_initial_size) |
377 | { | |
378 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 379 | |
aff410f1 MS |
380 | void *free_to_ptr = |
381 | obstack_next_free (&dont_print_statmem_obstack) - | |
382 | (obstack_final_size - statmem_obstack_initial_size); | |
0b66f317 | 383 | |
aff410f1 MS |
384 | obstack_free (&dont_print_statmem_obstack, |
385 | free_to_ptr); | |
386 | } | |
ec31cde5 CM |
387 | |
388 | if (last_set_recurse != recurse) | |
389 | { | |
f56dcb88 CM |
390 | int obstack_final_size = |
391 | obstack_object_size (&dont_print_stat_array_obstack); | |
392 | ||
393 | if (obstack_final_size > stat_array_obstack_initial_size) | |
394 | { | |
395 | void *free_to_ptr = | |
aff410f1 MS |
396 | obstack_next_free (&dont_print_stat_array_obstack) |
397 | - (obstack_final_size | |
398 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
399 | |
400 | obstack_free (&dont_print_stat_array_obstack, | |
401 | free_to_ptr); | |
402 | } | |
ec31cde5 CM |
403 | last_set_recurse = -1; |
404 | } | |
c906108c SS |
405 | } |
406 | ||
2a998fc0 | 407 | if (options->prettyformat) |
c906108c SS |
408 | { |
409 | fprintf_filtered (stream, "\n"); | |
410 | print_spaces_filtered (2 * recurse, stream); | |
411 | } | |
c5aa993b | 412 | } /* if there are data fields */ |
c5aa993b | 413 | |
c906108c SS |
414 | fprintf_filtered (stream, "}"); |
415 | } | |
416 | ||
edf3d5f3 TT |
417 | /* Like cp_print_value_fields, but find the runtime type of the object |
418 | and pass it as the `real_type' argument to cp_print_value_fields. | |
419 | This function is a hack to work around the fact that | |
420 | common_val_print passes the embedded offset to val_print, but not | |
421 | the enclosing type. */ | |
422 | ||
423 | void | |
424 | cp_print_value_fields_rtti (struct type *type, | |
425 | const gdb_byte *valaddr, int offset, | |
426 | CORE_ADDR address, | |
427 | struct ui_file *stream, int recurse, | |
0e03807e | 428 | const struct value *val, |
edf3d5f3 | 429 | const struct value_print_options *options, |
c5504eaf MS |
430 | struct type **dont_print_vb, |
431 | int dont_print_statmem) | |
edf3d5f3 | 432 | { |
0e03807e TT |
433 | struct type *real_type = NULL; |
434 | ||
435 | /* We require all bits to be valid in order to attempt a | |
436 | conversion. */ | |
437 | if (value_bits_valid (val, TARGET_CHAR_BIT * offset, | |
438 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
439 | { | |
440 | struct value *value; | |
441 | int full, top, using_enc; | |
442 | ||
443 | /* Ugh, we have to convert back to a value here. */ | |
444 | value = value_from_contents_and_address (type, valaddr + offset, | |
445 | address + offset); | |
9f1f738a | 446 | type = value_type (value); |
aff410f1 MS |
447 | /* We don't actually care about most of the result here -- just |
448 | the type. We already have the correct offset, due to how | |
449 | val_print was initially called. */ | |
0e03807e TT |
450 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
451 | } | |
452 | ||
edf3d5f3 TT |
453 | if (!real_type) |
454 | real_type = type; | |
455 | ||
456 | cp_print_value_fields (type, real_type, valaddr, offset, | |
0e03807e | 457 | address, stream, recurse, val, options, |
edf3d5f3 TT |
458 | dont_print_vb, dont_print_statmem); |
459 | } | |
460 | ||
aff410f1 MS |
461 | /* Special val_print routine to avoid printing multiple copies of |
462 | virtual baseclasses. */ | |
c906108c SS |
463 | |
464 | static void | |
a2bd3dcd | 465 | cp_print_value (struct type *type, struct type *real_type, |
aff410f1 MS |
466 | const gdb_byte *valaddr, int offset, |
467 | CORE_ADDR address, struct ui_file *stream, | |
468 | int recurse, const struct value *val, | |
79a45b7d TT |
469 | const struct value_print_options *options, |
470 | struct type **dont_print_vb) | |
c906108c | 471 | { |
c906108c | 472 | struct type **last_dont_print |
2c63a960 | 473 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 474 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 475 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
476 | int thisoffset; |
477 | struct type *thistype; | |
c906108c SS |
478 | |
479 | if (dont_print_vb == 0) | |
480 | { | |
aff410f1 MS |
481 | /* If we're at top level, carve out a completely fresh chunk of |
482 | the obstack and use that until this particular invocation | |
483 | returns. */ | |
c906108c SS |
484 | /* Bump up the high-water mark. Now alpha is omega. */ |
485 | obstack_finish (&dont_print_vb_obstack); | |
486 | } | |
487 | ||
488 | for (i = 0; i < n_baseclasses; i++) | |
489 | { | |
8af8e3bc | 490 | int boffset = 0; |
c906108c SS |
491 | int skip; |
492 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
0d5cff50 | 493 | const char *basename = TYPE_NAME (baseclass); |
8af8e3bc PA |
494 | const gdb_byte *base_valaddr = NULL; |
495 | const struct value *base_val = NULL; | |
496 | volatile struct gdb_exception ex; | |
c906108c SS |
497 | |
498 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
499 | { | |
500 | struct type **first_dont_print | |
2c63a960 | 501 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 502 | |
aff410f1 MS |
503 | int j = (struct type **) |
504 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
505 | |
506 | while (--j >= 0) | |
507 | if (baseclass == first_dont_print[j]) | |
508 | goto flush_it; | |
509 | ||
510 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
511 | } | |
512 | ||
b9d652ac DJ |
513 | thisoffset = offset; |
514 | thistype = real_type; | |
086280be | 515 | |
8af8e3bc | 516 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
c5aa993b | 517 | { |
8af8e3bc PA |
518 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
519 | } | |
520 | if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR) | |
521 | skip = -1; | |
522 | else if (ex.reason < 0) | |
523 | skip = 1; | |
524 | else | |
525 | { | |
526 | skip = 0; | |
c906108c | 527 | |
8af8e3bc | 528 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 529 | { |
8af8e3bc PA |
530 | /* The virtual base class pointer might have been |
531 | clobbered by the user program. Make sure that it | |
532 | still points to a valid memory location. */ | |
533 | ||
534 | if ((boffset + offset) < 0 | |
535 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
536 | { | |
d5161074 SP |
537 | gdb_byte *buf; |
538 | struct cleanup *back_to; | |
539 | ||
540 | buf = xmalloc (TYPE_LENGTH (baseclass)); | |
541 | back_to = make_cleanup (xfree, buf); | |
8af8e3bc PA |
542 | |
543 | if (target_read_memory (address + boffset, buf, | |
544 | TYPE_LENGTH (baseclass)) != 0) | |
545 | skip = 1; | |
546 | base_val = value_from_contents_and_address (baseclass, | |
547 | buf, | |
548 | address + boffset); | |
9f1f738a | 549 | baseclass = value_type (base_val); |
8af8e3bc PA |
550 | thisoffset = 0; |
551 | boffset = 0; | |
552 | thistype = baseclass; | |
553 | base_valaddr = value_contents_for_printing_const (base_val); | |
d5161074 | 554 | do_cleanups (back_to); |
8af8e3bc PA |
555 | } |
556 | else | |
557 | { | |
558 | base_valaddr = valaddr; | |
559 | base_val = val; | |
560 | } | |
c5aa993b JM |
561 | } |
562 | else | |
de4127a3 PA |
563 | { |
564 | base_valaddr = valaddr; | |
565 | base_val = val; | |
566 | } | |
c906108c SS |
567 | } |
568 | ||
aff410f1 | 569 | /* Now do the printing. */ |
2a998fc0 | 570 | if (options->prettyformat) |
c906108c SS |
571 | { |
572 | fprintf_filtered (stream, "\n"); | |
573 | print_spaces_filtered (2 * recurse, stream); | |
574 | } | |
575 | fputs_filtered ("<", stream); | |
aff410f1 MS |
576 | /* Not sure what the best notation is in the case where there is |
577 | no baseclass name. */ | |
c906108c SS |
578 | fputs_filtered (basename ? basename : "", stream); |
579 | fputs_filtered ("> = ", stream); | |
580 | ||
8af8e3bc PA |
581 | if (skip < 0) |
582 | val_print_unavailable (stream); | |
583 | else if (skip > 0) | |
584 | val_print_invalid_address (stream); | |
c906108c | 585 | else |
a6bac58e TT |
586 | { |
587 | int result = 0; | |
588 | ||
6dddc817 | 589 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
590 | baseclass if possible. */ |
591 | if (!options->raw) | |
6dddc817 DE |
592 | result |
593 | = apply_ext_lang_val_pretty_printer (baseclass, base_valaddr, | |
594 | thisoffset + boffset, | |
595 | value_address (base_val), | |
596 | stream, recurse, | |
597 | base_val, options, | |
598 | current_language); | |
de4127a3 | 599 | |
a6bac58e TT |
600 | if (!result) |
601 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
de4127a3 PA |
602 | thisoffset + boffset, |
603 | value_address (base_val), | |
604 | stream, recurse, base_val, options, | |
a6bac58e TT |
605 | ((struct type **) |
606 | obstack_base (&dont_print_vb_obstack)), | |
607 | 0); | |
608 | } | |
c906108c SS |
609 | fputs_filtered (", ", stream); |
610 | ||
611 | flush_it: | |
612 | ; | |
613 | } | |
614 | ||
615 | if (dont_print_vb == 0) | |
616 | { | |
617 | /* Free the space used to deal with the printing | |
c5aa993b | 618 | of this type from top level. */ |
c906108c SS |
619 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
620 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 621 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
622 | dont_print_vb_obstack = tmp_obstack; |
623 | } | |
624 | } | |
625 | ||
aff410f1 MS |
626 | /* Print value of a static member. To avoid infinite recursion when |
627 | printing a class that contains a static instance of the class, we | |
628 | keep the addresses of all printed static member classes in an | |
629 | obstack and refuse to print them more than once. | |
c906108c | 630 | |
79a45b7d | 631 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
632 | have the same meanings as in c_val_print. */ |
633 | ||
634 | static void | |
2c63a960 | 635 | cp_print_static_field (struct type *type, |
6943961c | 636 | struct value *val, |
2c63a960 | 637 | struct ui_file *stream, |
2c63a960 | 638 | int recurse, |
79a45b7d | 639 | const struct value_print_options *options) |
c906108c | 640 | { |
79a45b7d | 641 | struct value_print_options opts; |
686d4def PA |
642 | |
643 | if (value_entirely_optimized_out (val)) | |
644 | { | |
645 | val_print_optimized_out (val, stream); | |
646 | return; | |
647 | } | |
648 | ||
c906108c SS |
649 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
650 | { | |
651 | CORE_ADDR *first_dont_print; | |
42ae5230 | 652 | CORE_ADDR addr; |
c906108c SS |
653 | int i; |
654 | ||
655 | first_dont_print | |
c5aa993b | 656 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
657 | i = obstack_object_size (&dont_print_statmem_obstack) |
658 | / sizeof (CORE_ADDR); | |
c906108c SS |
659 | |
660 | while (--i >= 0) | |
661 | { | |
42ae5230 | 662 | if (value_address (val) == first_dont_print[i]) |
c906108c | 663 | { |
2c63a960 JB |
664 | fputs_filtered ("<same as static member of an already" |
665 | " seen type>", | |
c906108c SS |
666 | stream); |
667 | return; | |
668 | } | |
669 | } | |
670 | ||
42ae5230 TT |
671 | addr = value_address (val); |
672 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 673 | sizeof (CORE_ADDR)); |
c906108c | 674 | CHECK_TYPEDEF (type); |
edf3d5f3 | 675 | cp_print_value_fields (type, value_enclosing_type (val), |
0e03807e | 676 | value_contents_for_printing (val), |
42ae5230 | 677 | value_embedded_offset (val), addr, |
aff410f1 MS |
678 | stream, recurse, val, |
679 | options, NULL, 1); | |
c906108c SS |
680 | return; |
681 | } | |
79a45b7d | 682 | |
ec31cde5 CM |
683 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
684 | { | |
685 | struct type **first_dont_print; | |
686 | int i; | |
687 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
688 | ||
689 | first_dont_print | |
690 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
691 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 692 | / sizeof (struct type *); |
ec31cde5 CM |
693 | |
694 | while (--i >= 0) | |
695 | { | |
696 | if (target_type == first_dont_print[i]) | |
697 | { | |
698 | fputs_filtered ("<same as static member of an already" | |
699 | " seen type>", | |
700 | stream); | |
701 | return; | |
702 | } | |
703 | } | |
704 | ||
aff410f1 MS |
705 | obstack_grow (&dont_print_stat_array_obstack, |
706 | (char *) &target_type, | |
ec31cde5 CM |
707 | sizeof (struct type *)); |
708 | } | |
709 | ||
79a45b7d TT |
710 | opts = *options; |
711 | opts.deref_ref = 0; | |
0e03807e | 712 | val_print (type, value_contents_for_printing (val), |
aff410f1 MS |
713 | value_embedded_offset (val), |
714 | value_address (val), | |
715 | stream, recurse, val, | |
716 | &opts, current_language); | |
c906108c SS |
717 | } |
718 | ||
0d5de010 | 719 | |
aff410f1 MS |
720 | /* Find the field in *DOMAIN, or its non-virtual base classes, with |
721 | bit offset OFFSET. Set *DOMAIN to the containing type and *FIELDNO | |
722 | to the containing field number. If OFFSET is not exactly at the | |
723 | start of some field, set *DOMAIN to NULL. */ | |
0d5de010 | 724 | |
2c0b251b | 725 | static void |
0d5de010 DJ |
726 | cp_find_class_member (struct type **domain_p, int *fieldno, |
727 | LONGEST offset) | |
728 | { | |
729 | struct type *domain; | |
730 | unsigned int i; | |
731 | unsigned len; | |
732 | ||
733 | *domain_p = check_typedef (*domain_p); | |
734 | domain = *domain_p; | |
735 | len = TYPE_NFIELDS (domain); | |
736 | ||
737 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
738 | { | |
739 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
740 | ||
741 | QUIT; | |
742 | if (offset == bitpos) | |
743 | { | |
744 | *fieldno = i; | |
745 | return; | |
746 | } | |
747 | } | |
748 | ||
749 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
750 | { | |
751 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
752 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
753 | ||
754 | if (offset >= bitpos && offset < bitpos + bitsize) | |
755 | { | |
756 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
757 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
758 | return; | |
759 | } | |
760 | } | |
761 | ||
762 | *domain_p = NULL; | |
763 | } | |
764 | ||
c906108c | 765 | void |
ad4820ab | 766 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 767 | struct ui_file *stream, char *prefix) |
c906108c | 768 | { |
e17a4113 UW |
769 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
770 | ||
c906108c SS |
771 | /* VAL is a byte offset into the structure type DOMAIN. |
772 | Find the name of the field for that offset and | |
773 | print it. */ | |
ad4820ab | 774 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 775 | LONGEST val; |
9f8afa72 | 776 | int fieldno; |
c906108c | 777 | |
aff410f1 MS |
778 | val = extract_signed_integer (valaddr, |
779 | TYPE_LENGTH (type), | |
780 | byte_order); | |
e17a4113 | 781 | |
0d5de010 DJ |
782 | /* Pointers to data members are usually byte offsets into an object. |
783 | Because a data member can have offset zero, and a NULL pointer to | |
784 | member must be distinct from any valid non-NULL pointer to | |
785 | member, either the value is biased or the NULL value has a | |
786 | special representation; both are permitted by ISO C++. HP aCC | |
787 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
788 | and other compilers which use the Itanium ABI use -1 as the NULL | |
789 | value. GDB only supports that last form; to add support for | |
790 | another form, make this into a cp-abi hook. */ | |
c906108c | 791 | |
0d5de010 | 792 | if (val == -1) |
c906108c | 793 | { |
0d5de010 DJ |
794 | fprintf_filtered (stream, "NULL"); |
795 | return; | |
c906108c | 796 | } |
0d5de010 DJ |
797 | |
798 | cp_find_class_member (&domain, &fieldno, val << 3); | |
799 | ||
800 | if (domain != NULL) | |
c906108c | 801 | { |
0d5cff50 | 802 | const char *name; |
c5504eaf | 803 | |
306d9ac5 | 804 | fputs_filtered (prefix, stream); |
c906108c SS |
805 | name = type_name_no_tag (domain); |
806 | if (name) | |
c5aa993b | 807 | fputs_filtered (name, stream); |
c906108c | 808 | else |
79d43c61 | 809 | c_type_print_base (domain, stream, 0, 0, &type_print_raw_options); |
c906108c | 810 | fprintf_filtered (stream, "::"); |
0d5de010 | 811 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
812 | } |
813 | else | |
0d5de010 | 814 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
815 | } |
816 | ||
817 | ||
c906108c | 818 | void |
fba45db2 | 819 | _initialize_cp_valprint (void) |
c906108c | 820 | { |
5bf193a2 | 821 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 822 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
823 | Set printing of C++ static members."), _("\ |
824 | Show printing of C++ static members."), NULL, | |
825 | NULL, | |
920d2a44 | 826 | show_static_field_print, |
5bf193a2 | 827 | &setprintlist, &showprintlist); |
c906108c | 828 | |
79a45b7d TT |
829 | add_setshow_boolean_cmd ("vtbl", class_support, |
830 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
831 | Set printing of C++ virtual function tables."), _("\ |
832 | Show printing of C++ virtual function tables."), NULL, | |
833 | NULL, | |
920d2a44 | 834 | show_vtblprint, |
5bf193a2 AC |
835 | &setprintlist, &showprintlist); |
836 | ||
79a45b7d TT |
837 | add_setshow_boolean_cmd ("object", class_support, |
838 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
839 | Set printing of object's derived type based on vtable info."), _("\ |
840 | Show printing of object's derived type based on vtable info."), NULL, | |
841 | NULL, | |
920d2a44 | 842 | show_objectprint, |
5bf193a2 | 843 | &setprintlist, &showprintlist); |
c906108c | 844 | |
aff410f1 MS |
845 | obstack_begin (&dont_print_stat_array_obstack, |
846 | 32 * sizeof (struct type *)); | |
847 | obstack_begin (&dont_print_statmem_obstack, | |
848 | 32 * sizeof (CORE_ADDR)); | |
849 | obstack_begin (&dont_print_vb_obstack, | |
850 | 32 * sizeof (struct type *)); | |
c906108c | 851 | } |