Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
61baf725 | 3 | Copyright (C) 1986-2017 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" |
79d43c61 | 37 | #include "typeprint.h" |
c906108c | 38 | |
aff410f1 | 39 | /* Controls printing of vtbl's. */ |
920d2a44 AC |
40 | static void |
41 | show_vtblprint (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("\ | |
45 | Printing of C++ virtual function tables is %s.\n"), | |
46 | value); | |
47 | } | |
48 | ||
49 | /* Controls looking up an object's derived type using what we find in | |
50 | its vtables. */ | |
920d2a44 AC |
51 | static void |
52 | show_objectprint (struct ui_file *file, int from_tty, | |
53 | struct cmd_list_element *c, | |
54 | const char *value) | |
55 | { | |
56 | fprintf_filtered (file, _("\ | |
57 | Printing of object's derived type based on vtable info is %s.\n"), | |
58 | value); | |
59 | } | |
60 | ||
920d2a44 AC |
61 | static void |
62 | show_static_field_print (struct ui_file *file, int from_tty, | |
aff410f1 MS |
63 | struct cmd_list_element *c, |
64 | const char *value) | |
920d2a44 | 65 | { |
aff410f1 MS |
66 | fprintf_filtered (file, |
67 | _("Printing of C++ static members is %s.\n"), | |
920d2a44 AC |
68 | value); |
69 | } | |
70 | ||
c906108c SS |
71 | |
72 | static struct obstack dont_print_vb_obstack; | |
73 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 74 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 75 | |
a14ed312 | 76 | extern void _initialize_cp_valprint (void); |
392a587b | 77 | |
6943961c | 78 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
79 | struct ui_file *, int, |
80 | const struct value_print_options *); | |
c906108c | 81 | |
aff410f1 | 82 | static void cp_print_value (struct type *, struct type *, |
65408fa6 | 83 | LONGEST, |
aff410f1 | 84 | CORE_ADDR, struct ui_file *, |
e8b24d9f | 85 | int, struct value *, |
aff410f1 MS |
86 | const struct value_print_options *, |
87 | struct type **); | |
c906108c | 88 | |
c906108c | 89 | |
8343f86c | 90 | /* GCC versions after 2.4.5 use this. */ |
ddb6d633 | 91 | extern const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 92 | |
c906108c SS |
93 | /* Return truth value for assertion that TYPE is of the type |
94 | "pointer to virtual function". */ | |
95 | ||
96 | int | |
fba45db2 | 97 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 98 | { |
fe978cb0 | 99 | const char *type_name = type_name_no_tag (type); |
c906108c | 100 | |
fe978cb0 | 101 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
102 | } |
103 | ||
104 | /* Return truth value for the assertion that TYPE is of the type | |
105 | "pointer to virtual function table". */ | |
106 | ||
107 | int | |
fba45db2 | 108 | cp_is_vtbl_member (struct type *type) |
c906108c | 109 | { |
aff410f1 MS |
110 | /* With older versions of g++, the vtbl field pointed to an array of |
111 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
112 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
113 | { | |
114 | type = TYPE_TARGET_TYPE (type); | |
115 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
116 | { | |
117 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
118 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
119 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
120 | { |
121 | /* Virtual functions tables are full of pointers | |
aff410f1 | 122 | to virtual functions. */ |
c906108c SS |
123 | return cp_is_vtbl_ptr_type (type); |
124 | } | |
125 | } | |
0e5e3ea6 PS |
126 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
127 | { | |
128 | return cp_is_vtbl_ptr_type (type); | |
129 | } | |
130 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
131 | { | |
aff410f1 MS |
132 | /* The type name of the thunk pointer is NULL when using |
133 | dwarf2. We could test for a pointer to a function, but | |
134 | there is no type info for the virtual table either, so it | |
135 | wont help. */ | |
0e5e3ea6 PS |
136 | return cp_is_vtbl_ptr_type (type); |
137 | } | |
c906108c SS |
138 | } |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
143 | print out a structure's fields: cp_print_value_fields and |
144 | cp_print_value. | |
c5aa993b | 145 | |
aff410f1 MS |
146 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
147 | meanings as in cp_print_value and c_val_print. | |
c906108c | 148 | |
aff410f1 MS |
149 | 2nd argument REAL_TYPE is used to carry over the type of the |
150 | derived class across the recursion to base classes. | |
c906108c | 151 | |
aff410f1 MS |
152 | DONT_PRINT is an array of baseclass types that we should not print, |
153 | or zero if called from top level. */ | |
c906108c SS |
154 | |
155 | void | |
a2bd3dcd | 156 | cp_print_value_fields (struct type *type, struct type *real_type, |
65408fa6 | 157 | LONGEST offset, |
aff410f1 | 158 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 159 | int recurse, struct value *val, |
79a45b7d | 160 | const struct value_print_options *options, |
aff410f1 MS |
161 | struct type **dont_print_vb, |
162 | int dont_print_statmem) | |
c906108c SS |
163 | { |
164 | int i, len, n_baseclasses; | |
c906108c | 165 | int fields_seen = 0; |
ec31cde5 | 166 | static int last_set_recurse = -1; |
c906108c | 167 | |
f168693b | 168 | type = check_typedef (type); |
99903ae3 | 169 | |
ec31cde5 CM |
170 | if (recurse == 0) |
171 | { | |
aff410f1 MS |
172 | /* Any object can be left on obstacks only during an unexpected |
173 | error. */ | |
6036c742 | 174 | |
ec31cde5 | 175 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
176 | { |
177 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
178 | obstack_begin (&dont_print_statmem_obstack, |
179 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 180 | } |
ec31cde5 | 181 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
182 | { |
183 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
184 | obstack_begin (&dont_print_stat_array_obstack, | |
185 | 32 * sizeof (struct type *)); | |
186 | } | |
ec31cde5 | 187 | } |
c906108c SS |
188 | |
189 | fprintf_filtered (stream, "{"); | |
190 | len = TYPE_NFIELDS (type); | |
191 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
192 | ||
193 | /* First, print out baseclasses such that we don't print | |
194 | duplicates of virtual baseclasses. */ | |
195 | ||
196 | if (n_baseclasses > 0) | |
65408fa6 | 197 | cp_print_value (type, real_type, |
aff410f1 MS |
198 | offset, address, stream, |
199 | recurse + 1, val, options, | |
200 | dont_print_vb); | |
c906108c SS |
201 | |
202 | /* Second, print out data fields */ | |
203 | ||
086280be UW |
204 | /* If there are no data fields, skip this part */ |
205 | if (len == n_baseclasses || !len) | |
c906108c SS |
206 | fprintf_filtered (stream, "<No data fields>"); |
207 | else | |
208 | { | |
241fd515 AM |
209 | size_t statmem_obstack_initial_size = 0; |
210 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
211 | struct type *vptr_basetype = NULL; |
212 | int vptr_fieldno; | |
213 | ||
c906108c SS |
214 | if (dont_print_statmem == 0) |
215 | { | |
f56dcb88 | 216 | statmem_obstack_initial_size = |
0b66f317 | 217 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
218 | |
219 | if (last_set_recurse != recurse) | |
220 | { | |
f56dcb88 CM |
221 | stat_array_obstack_initial_size = |
222 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 223 | |
ec31cde5 CM |
224 | last_set_recurse = recurse; |
225 | } | |
c906108c SS |
226 | } |
227 | ||
7977e5d2 | 228 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
229 | for (i = n_baseclasses; i < len; i++) |
230 | { | |
65408fa6 YQ |
231 | const gdb_byte *valaddr = value_contents_for_printing (val); |
232 | ||
c906108c | 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 | } | |
c906108c SS |
297 | else |
298 | { | |
79a45b7d | 299 | struct value_print_options opts = *options; |
c5504eaf | 300 | |
79a45b7d | 301 | opts.deref_ref = 0; |
5467c6c8 PA |
302 | |
303 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 304 | |
79a45b7d | 305 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 306 | current_language); |
c906108c SS |
307 | } |
308 | } | |
309 | else | |
310 | { | |
311 | if (TYPE_FIELD_IGNORE (type, i)) | |
312 | { | |
aff410f1 MS |
313 | fputs_filtered ("<optimized out or zero length>", |
314 | stream); | |
c906108c | 315 | } |
d6a843b5 | 316 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 317 | { |
ee86786c TT |
318 | struct value *v = NULL; |
319 | ||
492d29ea | 320 | TRY |
ee86786c TT |
321 | { |
322 | v = value_static_field (type, i); | |
323 | } | |
324 | ||
492d29ea PA |
325 | CATCH (ex, RETURN_MASK_ERROR) |
326 | { | |
327 | fprintf_filtered (stream, | |
328 | _("<error reading variable: %s>"), | |
329 | ex.message); | |
330 | } | |
331 | END_CATCH | |
332 | ||
686d4def PA |
333 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
334 | v, stream, recurse + 1, | |
335 | options); | |
c906108c | 336 | } |
7977e5d2 | 337 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 338 | { |
a72c8f6a JK |
339 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
340 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
341 | ||
342 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
343 | { | |
344 | CORE_ADDR addr; | |
345 | ||
346 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
347 | print_function_pointer_address (options, |
348 | get_type_arch (type), | |
349 | addr, stream); | |
a72c8f6a | 350 | } |
410528f0 | 351 | } |
c906108c SS |
352 | else |
353 | { | |
79a45b7d | 354 | struct value_print_options opts = *options; |
c5504eaf | 355 | |
79a45b7d | 356 | opts.deref_ref = 0; |
c5aa993b | 357 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 358 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 359 | address, |
0e03807e | 360 | stream, recurse + 1, val, &opts, |
d8ca156b | 361 | current_language); |
c906108c SS |
362 | } |
363 | } | |
364 | annotate_field_end (); | |
365 | } | |
366 | ||
367 | if (dont_print_statmem == 0) | |
368 | { | |
241fd515 | 369 | size_t obstack_final_size = |
0b66f317 CM |
370 | obstack_object_size (&dont_print_statmem_obstack); |
371 | ||
aff410f1 MS |
372 | if (obstack_final_size > statmem_obstack_initial_size) |
373 | { | |
374 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 375 | |
aff410f1 | 376 | void *free_to_ptr = |
1ae1b8cc | 377 | (char *) obstack_next_free (&dont_print_statmem_obstack) - |
aff410f1 | 378 | (obstack_final_size - statmem_obstack_initial_size); |
0b66f317 | 379 | |
aff410f1 MS |
380 | obstack_free (&dont_print_statmem_obstack, |
381 | free_to_ptr); | |
382 | } | |
ec31cde5 CM |
383 | |
384 | if (last_set_recurse != recurse) | |
385 | { | |
241fd515 | 386 | size_t obstack_final_size = |
f56dcb88 CM |
387 | obstack_object_size (&dont_print_stat_array_obstack); |
388 | ||
389 | if (obstack_final_size > stat_array_obstack_initial_size) | |
390 | { | |
391 | void *free_to_ptr = | |
1ae1b8cc | 392 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
393 | - (obstack_final_size |
394 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
395 | |
396 | obstack_free (&dont_print_stat_array_obstack, | |
397 | free_to_ptr); | |
398 | } | |
ec31cde5 CM |
399 | last_set_recurse = -1; |
400 | } | |
c906108c SS |
401 | } |
402 | ||
2a998fc0 | 403 | if (options->prettyformat) |
c906108c SS |
404 | { |
405 | fprintf_filtered (stream, "\n"); | |
406 | print_spaces_filtered (2 * recurse, stream); | |
407 | } | |
c5aa993b | 408 | } /* if there are data fields */ |
c5aa993b | 409 | |
c906108c SS |
410 | fprintf_filtered (stream, "}"); |
411 | } | |
412 | ||
edf3d5f3 TT |
413 | /* Like cp_print_value_fields, but find the runtime type of the object |
414 | and pass it as the `real_type' argument to cp_print_value_fields. | |
415 | This function is a hack to work around the fact that | |
416 | common_val_print passes the embedded offset to val_print, but not | |
417 | the enclosing type. */ | |
418 | ||
419 | void | |
420 | cp_print_value_fields_rtti (struct type *type, | |
6b850546 | 421 | const gdb_byte *valaddr, LONGEST offset, |
edf3d5f3 TT |
422 | CORE_ADDR address, |
423 | struct ui_file *stream, int recurse, | |
e8b24d9f | 424 | struct value *val, |
edf3d5f3 | 425 | const struct value_print_options *options, |
c5504eaf MS |
426 | struct type **dont_print_vb, |
427 | int dont_print_statmem) | |
edf3d5f3 | 428 | { |
0e03807e TT |
429 | struct type *real_type = NULL; |
430 | ||
431 | /* We require all bits to be valid in order to attempt a | |
432 | conversion. */ | |
9a0dc9e3 PA |
433 | if (!value_bits_any_optimized_out (val, |
434 | TARGET_CHAR_BIT * offset, | |
435 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
436 | { |
437 | struct value *value; | |
6b850546 DT |
438 | int full, using_enc; |
439 | LONGEST top; | |
0e03807e TT |
440 | |
441 | /* Ugh, we have to convert back to a value here. */ | |
442 | value = value_from_contents_and_address (type, valaddr + offset, | |
443 | address + offset); | |
9f1f738a | 444 | type = value_type (value); |
aff410f1 MS |
445 | /* We don't actually care about most of the result here -- just |
446 | the type. We already have the correct offset, due to how | |
447 | val_print was initially called. */ | |
0e03807e TT |
448 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
449 | } | |
450 | ||
edf3d5f3 TT |
451 | if (!real_type) |
452 | real_type = type; | |
453 | ||
65408fa6 | 454 | cp_print_value_fields (type, real_type, offset, |
0e03807e | 455 | address, stream, recurse, val, options, |
edf3d5f3 TT |
456 | dont_print_vb, dont_print_statmem); |
457 | } | |
458 | ||
aff410f1 MS |
459 | /* Special val_print routine to avoid printing multiple copies of |
460 | virtual baseclasses. */ | |
c906108c SS |
461 | |
462 | static void | |
a2bd3dcd | 463 | cp_print_value (struct type *type, struct type *real_type, |
65408fa6 | 464 | LONGEST offset, |
aff410f1 | 465 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 466 | int recurse, struct value *val, |
79a45b7d TT |
467 | const struct value_print_options *options, |
468 | struct type **dont_print_vb) | |
c906108c | 469 | { |
c906108c | 470 | struct type **last_dont_print |
2c63a960 | 471 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 472 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 473 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
6b850546 | 474 | LONGEST thisoffset; |
b9d652ac | 475 | struct type *thistype; |
65408fa6 | 476 | const gdb_byte *valaddr = value_contents_for_printing (val); |
c906108c SS |
477 | |
478 | if (dont_print_vb == 0) | |
479 | { | |
aff410f1 MS |
480 | /* If we're at top level, carve out a completely fresh chunk of |
481 | the obstack and use that until this particular invocation | |
482 | returns. */ | |
c906108c SS |
483 | /* Bump up the high-water mark. Now alpha is omega. */ |
484 | obstack_finish (&dont_print_vb_obstack); | |
485 | } | |
486 | ||
487 | for (i = 0; i < n_baseclasses; i++) | |
488 | { | |
6b850546 | 489 | LONGEST boffset = 0; |
7556d4a4 | 490 | int skip = 0; |
c906108c | 491 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 492 | const char *basename = TYPE_NAME (baseclass); |
e8b24d9f | 493 | struct value *base_val = NULL; |
c906108c SS |
494 | |
495 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
496 | { | |
497 | struct type **first_dont_print | |
2c63a960 | 498 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 499 | |
aff410f1 MS |
500 | int j = (struct type **) |
501 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
502 | |
503 | while (--j >= 0) | |
504 | if (baseclass == first_dont_print[j]) | |
505 | goto flush_it; | |
506 | ||
507 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
508 | } | |
509 | ||
b9d652ac DJ |
510 | thisoffset = offset; |
511 | thistype = real_type; | |
086280be | 512 | |
492d29ea | 513 | TRY |
c5aa993b | 514 | { |
8af8e3bc PA |
515 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
516 | } | |
492d29ea | 517 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
518 | { |
519 | if (ex.error == NOT_AVAILABLE_ERROR) | |
520 | skip = -1; | |
521 | else | |
522 | skip = 1; | |
523 | } | |
492d29ea | 524 | END_CATCH |
c906108c | 525 | |
7556d4a4 PA |
526 | if (skip == 0) |
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 | ||
224c3ddb | 540 | buf = (gdb_byte *) xmalloc (TYPE_LENGTH (baseclass)); |
d5161074 | 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; | |
d5161074 | 553 | do_cleanups (back_to); |
8af8e3bc PA |
554 | } |
555 | else | |
556 | { | |
8af8e3bc PA |
557 | base_val = val; |
558 | } | |
c5aa993b JM |
559 | } |
560 | else | |
de4127a3 | 561 | { |
de4127a3 PA |
562 | base_val = val; |
563 | } | |
c906108c SS |
564 | } |
565 | ||
aff410f1 | 566 | /* Now do the printing. */ |
2a998fc0 | 567 | if (options->prettyformat) |
c906108c SS |
568 | { |
569 | fprintf_filtered (stream, "\n"); | |
570 | print_spaces_filtered (2 * recurse, stream); | |
571 | } | |
572 | fputs_filtered ("<", stream); | |
aff410f1 MS |
573 | /* Not sure what the best notation is in the case where there is |
574 | no baseclass name. */ | |
c906108c SS |
575 | fputs_filtered (basename ? basename : "", stream); |
576 | fputs_filtered ("> = ", stream); | |
577 | ||
8af8e3bc PA |
578 | if (skip < 0) |
579 | val_print_unavailable (stream); | |
580 | else if (skip > 0) | |
581 | val_print_invalid_address (stream); | |
c906108c | 582 | else |
a6bac58e TT |
583 | { |
584 | int result = 0; | |
585 | ||
6dddc817 | 586 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
587 | baseclass if possible. */ |
588 | if (!options->raw) | |
6dddc817 | 589 | result |
668e1674 | 590 | = apply_ext_lang_val_pretty_printer (baseclass, |
6dddc817 DE |
591 | thisoffset + boffset, |
592 | value_address (base_val), | |
593 | stream, recurse, | |
594 | base_val, options, | |
595 | current_language); | |
de4127a3 | 596 | |
a6bac58e | 597 | if (!result) |
65408fa6 | 598 | cp_print_value_fields (baseclass, thistype, |
de4127a3 PA |
599 | thisoffset + boffset, |
600 | value_address (base_val), | |
601 | stream, recurse, base_val, options, | |
a6bac58e TT |
602 | ((struct type **) |
603 | obstack_base (&dont_print_vb_obstack)), | |
604 | 0); | |
605 | } | |
c906108c SS |
606 | fputs_filtered (", ", stream); |
607 | ||
608 | flush_it: | |
609 | ; | |
610 | } | |
611 | ||
612 | if (dont_print_vb == 0) | |
613 | { | |
614 | /* Free the space used to deal with the printing | |
c5aa993b | 615 | of this type from top level. */ |
c906108c SS |
616 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
617 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 618 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
619 | dont_print_vb_obstack = tmp_obstack; |
620 | } | |
621 | } | |
622 | ||
aff410f1 MS |
623 | /* Print value of a static member. To avoid infinite recursion when |
624 | printing a class that contains a static instance of the class, we | |
625 | keep the addresses of all printed static member classes in an | |
626 | obstack and refuse to print them more than once. | |
c906108c | 627 | |
79a45b7d | 628 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
629 | have the same meanings as in c_val_print. */ |
630 | ||
631 | static void | |
2c63a960 | 632 | cp_print_static_field (struct type *type, |
6943961c | 633 | struct value *val, |
2c63a960 | 634 | struct ui_file *stream, |
2c63a960 | 635 | int recurse, |
79a45b7d | 636 | const struct value_print_options *options) |
c906108c | 637 | { |
79a45b7d | 638 | struct value_print_options opts; |
686d4def PA |
639 | |
640 | if (value_entirely_optimized_out (val)) | |
641 | { | |
642 | val_print_optimized_out (val, stream); | |
643 | return; | |
644 | } | |
645 | ||
c906108c SS |
646 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
647 | { | |
648 | CORE_ADDR *first_dont_print; | |
42ae5230 | 649 | CORE_ADDR addr; |
c906108c SS |
650 | int i; |
651 | ||
652 | first_dont_print | |
c5aa993b | 653 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
654 | i = obstack_object_size (&dont_print_statmem_obstack) |
655 | / sizeof (CORE_ADDR); | |
c906108c SS |
656 | |
657 | while (--i >= 0) | |
658 | { | |
42ae5230 | 659 | if (value_address (val) == first_dont_print[i]) |
c906108c | 660 | { |
2c63a960 JB |
661 | fputs_filtered ("<same as static member of an already" |
662 | " seen type>", | |
c906108c SS |
663 | stream); |
664 | return; | |
665 | } | |
666 | } | |
667 | ||
42ae5230 TT |
668 | addr = value_address (val); |
669 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 670 | sizeof (CORE_ADDR)); |
f168693b | 671 | type = check_typedef (type); |
edf3d5f3 | 672 | cp_print_value_fields (type, value_enclosing_type (val), |
42ae5230 | 673 | value_embedded_offset (val), addr, |
aff410f1 MS |
674 | stream, recurse, val, |
675 | options, NULL, 1); | |
c906108c SS |
676 | return; |
677 | } | |
79a45b7d | 678 | |
ec31cde5 CM |
679 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
680 | { | |
681 | struct type **first_dont_print; | |
682 | int i; | |
683 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
684 | ||
685 | first_dont_print | |
686 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
687 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 688 | / sizeof (struct type *); |
ec31cde5 CM |
689 | |
690 | while (--i >= 0) | |
691 | { | |
692 | if (target_type == first_dont_print[i]) | |
693 | { | |
694 | fputs_filtered ("<same as static member of an already" | |
695 | " seen type>", | |
696 | stream); | |
697 | return; | |
698 | } | |
699 | } | |
700 | ||
aff410f1 MS |
701 | obstack_grow (&dont_print_stat_array_obstack, |
702 | (char *) &target_type, | |
ec31cde5 CM |
703 | sizeof (struct type *)); |
704 | } | |
705 | ||
79a45b7d TT |
706 | opts = *options; |
707 | opts.deref_ref = 0; | |
e8b24d9f | 708 | val_print (type, |
aff410f1 MS |
709 | value_embedded_offset (val), |
710 | value_address (val), | |
711 | stream, recurse, val, | |
712 | &opts, current_language); | |
c906108c SS |
713 | } |
714 | ||
09e2d7c7 DE |
715 | /* Find the field in *SELF, or its non-virtual base classes, with |
716 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 717 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 718 | start of some field, set *SELF to NULL. */ |
0d5de010 | 719 | |
2c0b251b | 720 | static void |
09e2d7c7 | 721 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
722 | LONGEST offset) |
723 | { | |
09e2d7c7 | 724 | struct type *self; |
0d5de010 DJ |
725 | unsigned int i; |
726 | unsigned len; | |
727 | ||
09e2d7c7 DE |
728 | *self_p = check_typedef (*self_p); |
729 | self = *self_p; | |
730 | len = TYPE_NFIELDS (self); | |
0d5de010 | 731 | |
09e2d7c7 | 732 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 733 | { |
09e2d7c7 | 734 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
735 | |
736 | QUIT; | |
737 | if (offset == bitpos) | |
738 | { | |
739 | *fieldno = i; | |
740 | return; | |
741 | } | |
742 | } | |
743 | ||
09e2d7c7 | 744 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 745 | { |
09e2d7c7 DE |
746 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
747 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
748 | |
749 | if (offset >= bitpos && offset < bitpos + bitsize) | |
750 | { | |
09e2d7c7 DE |
751 | *self_p = TYPE_FIELD_TYPE (self, i); |
752 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
753 | return; |
754 | } | |
755 | } | |
756 | ||
09e2d7c7 | 757 | *self_p = NULL; |
0d5de010 DJ |
758 | } |
759 | ||
c906108c | 760 | void |
ad4820ab | 761 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 762 | struct ui_file *stream, const char *prefix) |
c906108c | 763 | { |
e17a4113 UW |
764 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
765 | ||
09e2d7c7 | 766 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
767 | Find the name of the field for that offset and |
768 | print it. */ | |
09e2d7c7 | 769 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 770 | LONGEST val; |
9f8afa72 | 771 | int fieldno; |
c906108c | 772 | |
aff410f1 MS |
773 | val = extract_signed_integer (valaddr, |
774 | TYPE_LENGTH (type), | |
775 | byte_order); | |
e17a4113 | 776 | |
0d5de010 DJ |
777 | /* Pointers to data members are usually byte offsets into an object. |
778 | Because a data member can have offset zero, and a NULL pointer to | |
779 | member must be distinct from any valid non-NULL pointer to | |
780 | member, either the value is biased or the NULL value has a | |
781 | special representation; both are permitted by ISO C++. HP aCC | |
782 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
783 | and other compilers which use the Itanium ABI use -1 as the NULL | |
784 | value. GDB only supports that last form; to add support for | |
785 | another form, make this into a cp-abi hook. */ | |
c906108c | 786 | |
0d5de010 | 787 | if (val == -1) |
c906108c | 788 | { |
0d5de010 DJ |
789 | fprintf_filtered (stream, "NULL"); |
790 | return; | |
c906108c | 791 | } |
0d5de010 | 792 | |
09e2d7c7 | 793 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 794 | |
09e2d7c7 | 795 | if (self_type != NULL) |
c906108c | 796 | { |
0d5cff50 | 797 | const char *name; |
c5504eaf | 798 | |
306d9ac5 | 799 | fputs_filtered (prefix, stream); |
09e2d7c7 | 800 | name = type_name_no_tag (self_type); |
c906108c | 801 | if (name) |
c5aa993b | 802 | fputs_filtered (name, stream); |
c906108c | 803 | else |
09e2d7c7 | 804 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 805 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 806 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
807 | } |
808 | else | |
0d5de010 | 809 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
810 | } |
811 | ||
812 | ||
c906108c | 813 | void |
fba45db2 | 814 | _initialize_cp_valprint (void) |
c906108c | 815 | { |
5bf193a2 | 816 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 817 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
818 | Set printing of C++ static members."), _("\ |
819 | Show printing of C++ static members."), NULL, | |
820 | NULL, | |
920d2a44 | 821 | show_static_field_print, |
5bf193a2 | 822 | &setprintlist, &showprintlist); |
c906108c | 823 | |
79a45b7d TT |
824 | add_setshow_boolean_cmd ("vtbl", class_support, |
825 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
826 | Set printing of C++ virtual function tables."), _("\ |
827 | Show printing of C++ virtual function tables."), NULL, | |
828 | NULL, | |
920d2a44 | 829 | show_vtblprint, |
5bf193a2 AC |
830 | &setprintlist, &showprintlist); |
831 | ||
79a45b7d TT |
832 | add_setshow_boolean_cmd ("object", class_support, |
833 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
834 | Set printing of object's derived type based on vtable info."), _("\ |
835 | Show printing of object's derived type based on vtable info."), NULL, | |
836 | NULL, | |
920d2a44 | 837 | show_objectprint, |
5bf193a2 | 838 | &setprintlist, &showprintlist); |
c906108c | 839 | |
aff410f1 MS |
840 | obstack_begin (&dont_print_stat_array_obstack, |
841 | 32 * sizeof (struct type *)); | |
842 | obstack_begin (&dont_print_statmem_obstack, | |
843 | 32 * sizeof (CORE_ADDR)); | |
844 | obstack_begin (&dont_print_vb_obstack, | |
845 | 32 * sizeof (struct type *)); | |
c906108c | 846 | } |