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" |
26fcd5d7 | 38 | #include "byte-vector.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 | 83 | static void cp_print_value (struct type *, struct type *, |
65408fa6 | 84 | LONGEST, |
aff410f1 | 85 | CORE_ADDR, struct ui_file *, |
e8b24d9f | 86 | int, struct value *, |
aff410f1 MS |
87 | const struct value_print_options *, |
88 | struct type **); | |
c906108c | 89 | |
c906108c | 90 | |
8343f86c | 91 | /* GCC versions after 2.4.5 use this. */ |
ddb6d633 | 92 | extern 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 | { |
fe978cb0 | 100 | const char *type_name = type_name_no_tag (type); |
c906108c | 101 | |
fe978cb0 | 102 | return (type_name != NULL && !strcmp (type_name, 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, |
65408fa6 | 158 | LONGEST offset, |
aff410f1 | 159 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 160 | int recurse, 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 | 168 | |
f168693b | 169 | type = 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) | |
65408fa6 | 198 | cp_print_value (type, real_type, |
aff410f1 MS |
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 | { | |
65408fa6 YQ |
232 | const gdb_byte *valaddr = value_contents_for_printing (val); |
233 | ||
c906108c | 234 | /* If requested, skip printing of static fields. */ |
79a45b7d | 235 | if (!options->static_field_print |
d6a843b5 | 236 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
237 | continue; |
238 | ||
c906108c SS |
239 | if (fields_seen) |
240 | fprintf_filtered (stream, ", "); | |
241 | else if (n_baseclasses > 0) | |
242 | { | |
2a998fc0 | 243 | if (options->prettyformat) |
c906108c SS |
244 | { |
245 | fprintf_filtered (stream, "\n"); | |
246 | print_spaces_filtered (2 + 2 * recurse, stream); | |
247 | fputs_filtered ("members of ", stream); | |
248 | fputs_filtered (type_name_no_tag (type), stream); | |
249 | fputs_filtered (": ", stream); | |
250 | } | |
251 | } | |
252 | fields_seen = 1; | |
253 | ||
2a998fc0 | 254 | if (options->prettyformat) |
c906108c SS |
255 | { |
256 | fprintf_filtered (stream, "\n"); | |
257 | print_spaces_filtered (2 + 2 * recurse, stream); | |
258 | } | |
c5aa993b | 259 | else |
c906108c SS |
260 | { |
261 | wrap_here (n_spaces (2 + 2 * recurse)); | |
262 | } | |
e93a8774 TT |
263 | |
264 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
265 | ||
266 | if (field_is_static (&TYPE_FIELD (type, i))) | |
267 | fputs_filtered ("static ", stream); | |
268 | fprintf_symbol_filtered (stream, | |
269 | TYPE_FIELD_NAME (type, i), | |
270 | current_language->la_language, | |
271 | DMGL_PARAMS | DMGL_ANSI); | |
272 | annotate_field_name_end (); | |
273 | /* Do not print leading '=' in case of anonymous | |
274 | unions. */ | |
275 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
276 | fputs_filtered (" = ", stream); | |
277 | annotate_field_value (); | |
c906108c | 278 | |
d6a843b5 JK |
279 | if (!field_is_static (&TYPE_FIELD (type, i)) |
280 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 281 | { |
6943961c | 282 | struct value *v; |
c906108c | 283 | |
aff410f1 MS |
284 | /* Bitfields require special handling, especially due to |
285 | byte order problems. */ | |
c906108c SS |
286 | if (TYPE_FIELD_IGNORE (type, i)) |
287 | { | |
c5aa993b | 288 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 289 | } |
8cf6f0b1 TT |
290 | else if (value_bits_synthetic_pointer (val, |
291 | TYPE_FIELD_BITPOS (type, | |
292 | i), | |
293 | TYPE_FIELD_BITSIZE (type, | |
294 | i))) | |
295 | { | |
296 | fputs_filtered (_("<synthetic pointer>"), stream); | |
297 | } | |
c906108c SS |
298 | else |
299 | { | |
79a45b7d | 300 | struct value_print_options opts = *options; |
c5504eaf | 301 | |
79a45b7d | 302 | opts.deref_ref = 0; |
5467c6c8 PA |
303 | |
304 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 305 | |
79a45b7d | 306 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 307 | current_language); |
c906108c SS |
308 | } |
309 | } | |
310 | else | |
311 | { | |
312 | if (TYPE_FIELD_IGNORE (type, i)) | |
313 | { | |
aff410f1 MS |
314 | fputs_filtered ("<optimized out or zero length>", |
315 | stream); | |
c906108c | 316 | } |
d6a843b5 | 317 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 318 | { |
ee86786c TT |
319 | struct value *v = NULL; |
320 | ||
492d29ea | 321 | TRY |
ee86786c TT |
322 | { |
323 | v = value_static_field (type, i); | |
324 | } | |
325 | ||
492d29ea PA |
326 | CATCH (ex, RETURN_MASK_ERROR) |
327 | { | |
328 | fprintf_filtered (stream, | |
329 | _("<error reading variable: %s>"), | |
330 | ex.message); | |
331 | } | |
332 | END_CATCH | |
333 | ||
686d4def PA |
334 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
335 | v, stream, recurse + 1, | |
336 | options); | |
c906108c | 337 | } |
7977e5d2 | 338 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 339 | { |
a72c8f6a JK |
340 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
341 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
342 | ||
343 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
344 | { | |
345 | CORE_ADDR addr; | |
346 | ||
347 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
348 | print_function_pointer_address (options, |
349 | get_type_arch (type), | |
350 | addr, stream); | |
a72c8f6a | 351 | } |
410528f0 | 352 | } |
c906108c SS |
353 | else |
354 | { | |
79a45b7d | 355 | struct value_print_options opts = *options; |
c5504eaf | 356 | |
79a45b7d | 357 | opts.deref_ref = 0; |
c5aa993b | 358 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 359 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 360 | address, |
0e03807e | 361 | stream, recurse + 1, val, &opts, |
d8ca156b | 362 | current_language); |
c906108c SS |
363 | } |
364 | } | |
365 | annotate_field_end (); | |
366 | } | |
367 | ||
368 | if (dont_print_statmem == 0) | |
369 | { | |
241fd515 | 370 | size_t obstack_final_size = |
0b66f317 CM |
371 | obstack_object_size (&dont_print_statmem_obstack); |
372 | ||
aff410f1 MS |
373 | if (obstack_final_size > statmem_obstack_initial_size) |
374 | { | |
375 | /* In effect, a pop of the printed-statics stack. */ | |
0b66f317 | 376 | |
aff410f1 | 377 | void *free_to_ptr = |
1ae1b8cc | 378 | (char *) obstack_next_free (&dont_print_statmem_obstack) - |
aff410f1 | 379 | (obstack_final_size - statmem_obstack_initial_size); |
0b66f317 | 380 | |
aff410f1 MS |
381 | obstack_free (&dont_print_statmem_obstack, |
382 | free_to_ptr); | |
383 | } | |
ec31cde5 CM |
384 | |
385 | if (last_set_recurse != recurse) | |
386 | { | |
241fd515 | 387 | size_t obstack_final_size = |
f56dcb88 CM |
388 | obstack_object_size (&dont_print_stat_array_obstack); |
389 | ||
390 | if (obstack_final_size > stat_array_obstack_initial_size) | |
391 | { | |
392 | void *free_to_ptr = | |
1ae1b8cc | 393 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
394 | - (obstack_final_size |
395 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
396 | |
397 | obstack_free (&dont_print_stat_array_obstack, | |
398 | free_to_ptr); | |
399 | } | |
ec31cde5 CM |
400 | last_set_recurse = -1; |
401 | } | |
c906108c SS |
402 | } |
403 | ||
2a998fc0 | 404 | if (options->prettyformat) |
c906108c SS |
405 | { |
406 | fprintf_filtered (stream, "\n"); | |
407 | print_spaces_filtered (2 * recurse, stream); | |
408 | } | |
c5aa993b | 409 | } /* if there are data fields */ |
c5aa993b | 410 | |
c906108c SS |
411 | fprintf_filtered (stream, "}"); |
412 | } | |
413 | ||
edf3d5f3 TT |
414 | /* Like cp_print_value_fields, but find the runtime type of the object |
415 | and pass it as the `real_type' argument to cp_print_value_fields. | |
416 | This function is a hack to work around the fact that | |
417 | common_val_print passes the embedded offset to val_print, but not | |
418 | the enclosing type. */ | |
419 | ||
420 | void | |
421 | cp_print_value_fields_rtti (struct type *type, | |
6b850546 | 422 | const gdb_byte *valaddr, LONGEST offset, |
edf3d5f3 TT |
423 | CORE_ADDR address, |
424 | struct ui_file *stream, int recurse, | |
e8b24d9f | 425 | struct value *val, |
edf3d5f3 | 426 | const struct value_print_options *options, |
c5504eaf MS |
427 | struct type **dont_print_vb, |
428 | int dont_print_statmem) | |
edf3d5f3 | 429 | { |
0e03807e TT |
430 | struct type *real_type = NULL; |
431 | ||
432 | /* We require all bits to be valid in order to attempt a | |
433 | conversion. */ | |
9a0dc9e3 PA |
434 | if (!value_bits_any_optimized_out (val, |
435 | TARGET_CHAR_BIT * offset, | |
436 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
437 | { |
438 | struct value *value; | |
6b850546 DT |
439 | int full, using_enc; |
440 | LONGEST top; | |
0e03807e TT |
441 | |
442 | /* Ugh, we have to convert back to a value here. */ | |
443 | value = value_from_contents_and_address (type, valaddr + offset, | |
444 | address + offset); | |
9f1f738a | 445 | type = value_type (value); |
aff410f1 MS |
446 | /* We don't actually care about most of the result here -- just |
447 | the type. We already have the correct offset, due to how | |
448 | val_print was initially called. */ | |
0e03807e TT |
449 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
450 | } | |
451 | ||
edf3d5f3 TT |
452 | if (!real_type) |
453 | real_type = type; | |
454 | ||
65408fa6 | 455 | cp_print_value_fields (type, real_type, offset, |
0e03807e | 456 | address, stream, recurse, val, options, |
edf3d5f3 TT |
457 | dont_print_vb, dont_print_statmem); |
458 | } | |
459 | ||
aff410f1 MS |
460 | /* Special val_print routine to avoid printing multiple copies of |
461 | virtual baseclasses. */ | |
c906108c SS |
462 | |
463 | static void | |
a2bd3dcd | 464 | cp_print_value (struct type *type, struct type *real_type, |
65408fa6 | 465 | LONGEST offset, |
aff410f1 | 466 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 467 | int recurse, struct value *val, |
79a45b7d TT |
468 | const struct value_print_options *options, |
469 | struct type **dont_print_vb) | |
c906108c | 470 | { |
c906108c | 471 | struct type **last_dont_print |
2c63a960 | 472 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 473 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 474 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
6b850546 | 475 | LONGEST thisoffset; |
b9d652ac | 476 | struct type *thistype; |
65408fa6 | 477 | const gdb_byte *valaddr = value_contents_for_printing (val); |
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 | { | |
6b850546 | 490 | LONGEST boffset = 0; |
7556d4a4 | 491 | int skip = 0; |
c906108c | 492 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 493 | const char *basename = TYPE_NAME (baseclass); |
e8b24d9f | 494 | struct value *base_val = NULL; |
c906108c SS |
495 | |
496 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
497 | { | |
498 | struct type **first_dont_print | |
2c63a960 | 499 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 500 | |
aff410f1 MS |
501 | int j = (struct type **) |
502 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
503 | |
504 | while (--j >= 0) | |
505 | if (baseclass == first_dont_print[j]) | |
506 | goto flush_it; | |
507 | ||
508 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
509 | } | |
510 | ||
b9d652ac DJ |
511 | thisoffset = offset; |
512 | thistype = real_type; | |
086280be | 513 | |
492d29ea | 514 | TRY |
c5aa993b | 515 | { |
8af8e3bc PA |
516 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
517 | } | |
492d29ea | 518 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
519 | { |
520 | if (ex.error == NOT_AVAILABLE_ERROR) | |
521 | skip = -1; | |
522 | else | |
523 | skip = 1; | |
524 | } | |
492d29ea | 525 | END_CATCH |
c906108c | 526 | |
7556d4a4 PA |
527 | if (skip == 0) |
528 | { | |
8af8e3bc | 529 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 530 | { |
8af8e3bc PA |
531 | /* The virtual base class pointer might have been |
532 | clobbered by the user program. Make sure that it | |
533 | still points to a valid memory location. */ | |
534 | ||
535 | if ((boffset + offset) < 0 | |
536 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
537 | { | |
26fcd5d7 | 538 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); |
d5161074 | 539 | |
26fcd5d7 | 540 | if (target_read_memory (address + boffset, buf.data (), |
8af8e3bc PA |
541 | TYPE_LENGTH (baseclass)) != 0) |
542 | skip = 1; | |
543 | base_val = value_from_contents_and_address (baseclass, | |
26fcd5d7 | 544 | buf.data (), |
8af8e3bc | 545 | address + boffset); |
9f1f738a | 546 | baseclass = value_type (base_val); |
8af8e3bc PA |
547 | thisoffset = 0; |
548 | boffset = 0; | |
549 | thistype = baseclass; | |
8af8e3bc PA |
550 | } |
551 | else | |
552 | { | |
8af8e3bc PA |
553 | base_val = val; |
554 | } | |
c5aa993b JM |
555 | } |
556 | else | |
de4127a3 | 557 | { |
de4127a3 PA |
558 | base_val = val; |
559 | } | |
c906108c SS |
560 | } |
561 | ||
aff410f1 | 562 | /* Now do the printing. */ |
2a998fc0 | 563 | if (options->prettyformat) |
c906108c SS |
564 | { |
565 | fprintf_filtered (stream, "\n"); | |
566 | print_spaces_filtered (2 * recurse, stream); | |
567 | } | |
568 | fputs_filtered ("<", stream); | |
aff410f1 MS |
569 | /* Not sure what the best notation is in the case where there is |
570 | no baseclass name. */ | |
c906108c SS |
571 | fputs_filtered (basename ? basename : "", stream); |
572 | fputs_filtered ("> = ", stream); | |
573 | ||
8af8e3bc PA |
574 | if (skip < 0) |
575 | val_print_unavailable (stream); | |
576 | else if (skip > 0) | |
577 | val_print_invalid_address (stream); | |
c906108c | 578 | else |
a6bac58e TT |
579 | { |
580 | int result = 0; | |
581 | ||
6dddc817 | 582 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
583 | baseclass if possible. */ |
584 | if (!options->raw) | |
6dddc817 | 585 | result |
668e1674 | 586 | = apply_ext_lang_val_pretty_printer (baseclass, |
6dddc817 DE |
587 | thisoffset + boffset, |
588 | value_address (base_val), | |
589 | stream, recurse, | |
590 | base_val, options, | |
591 | current_language); | |
de4127a3 | 592 | |
a6bac58e | 593 | if (!result) |
65408fa6 | 594 | cp_print_value_fields (baseclass, thistype, |
de4127a3 PA |
595 | thisoffset + boffset, |
596 | value_address (base_val), | |
597 | stream, recurse, base_val, options, | |
a6bac58e TT |
598 | ((struct type **) |
599 | obstack_base (&dont_print_vb_obstack)), | |
600 | 0); | |
601 | } | |
c906108c SS |
602 | fputs_filtered (", ", stream); |
603 | ||
604 | flush_it: | |
605 | ; | |
606 | } | |
607 | ||
608 | if (dont_print_vb == 0) | |
609 | { | |
610 | /* Free the space used to deal with the printing | |
c5aa993b | 611 | of this type from top level. */ |
c906108c SS |
612 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
613 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 614 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
615 | dont_print_vb_obstack = tmp_obstack; |
616 | } | |
617 | } | |
618 | ||
aff410f1 MS |
619 | /* Print value of a static member. To avoid infinite recursion when |
620 | printing a class that contains a static instance of the class, we | |
621 | keep the addresses of all printed static member classes in an | |
622 | obstack and refuse to print them more than once. | |
c906108c | 623 | |
79a45b7d | 624 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
625 | have the same meanings as in c_val_print. */ |
626 | ||
627 | static void | |
2c63a960 | 628 | cp_print_static_field (struct type *type, |
6943961c | 629 | struct value *val, |
2c63a960 | 630 | struct ui_file *stream, |
2c63a960 | 631 | int recurse, |
79a45b7d | 632 | const struct value_print_options *options) |
c906108c | 633 | { |
79a45b7d | 634 | struct value_print_options opts; |
686d4def PA |
635 | |
636 | if (value_entirely_optimized_out (val)) | |
637 | { | |
638 | val_print_optimized_out (val, stream); | |
639 | return; | |
640 | } | |
641 | ||
c906108c SS |
642 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
643 | { | |
644 | CORE_ADDR *first_dont_print; | |
42ae5230 | 645 | CORE_ADDR addr; |
c906108c SS |
646 | int i; |
647 | ||
648 | first_dont_print | |
c5aa993b | 649 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
650 | i = obstack_object_size (&dont_print_statmem_obstack) |
651 | / sizeof (CORE_ADDR); | |
c906108c SS |
652 | |
653 | while (--i >= 0) | |
654 | { | |
42ae5230 | 655 | if (value_address (val) == first_dont_print[i]) |
c906108c | 656 | { |
2c63a960 JB |
657 | fputs_filtered ("<same as static member of an already" |
658 | " seen type>", | |
c906108c SS |
659 | stream); |
660 | return; | |
661 | } | |
662 | } | |
663 | ||
42ae5230 TT |
664 | addr = value_address (val); |
665 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 666 | sizeof (CORE_ADDR)); |
f168693b | 667 | type = check_typedef (type); |
edf3d5f3 | 668 | cp_print_value_fields (type, value_enclosing_type (val), |
42ae5230 | 669 | value_embedded_offset (val), addr, |
aff410f1 MS |
670 | stream, recurse, val, |
671 | options, NULL, 1); | |
c906108c SS |
672 | return; |
673 | } | |
79a45b7d | 674 | |
ec31cde5 CM |
675 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
676 | { | |
677 | struct type **first_dont_print; | |
678 | int i; | |
679 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
680 | ||
681 | first_dont_print | |
682 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
683 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 684 | / sizeof (struct type *); |
ec31cde5 CM |
685 | |
686 | while (--i >= 0) | |
687 | { | |
688 | if (target_type == first_dont_print[i]) | |
689 | { | |
690 | fputs_filtered ("<same as static member of an already" | |
691 | " seen type>", | |
692 | stream); | |
693 | return; | |
694 | } | |
695 | } | |
696 | ||
aff410f1 MS |
697 | obstack_grow (&dont_print_stat_array_obstack, |
698 | (char *) &target_type, | |
ec31cde5 CM |
699 | sizeof (struct type *)); |
700 | } | |
701 | ||
79a45b7d TT |
702 | opts = *options; |
703 | opts.deref_ref = 0; | |
e8b24d9f | 704 | val_print (type, |
aff410f1 MS |
705 | value_embedded_offset (val), |
706 | value_address (val), | |
707 | stream, recurse, val, | |
708 | &opts, current_language); | |
c906108c SS |
709 | } |
710 | ||
09e2d7c7 DE |
711 | /* Find the field in *SELF, or its non-virtual base classes, with |
712 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 713 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 714 | start of some field, set *SELF to NULL. */ |
0d5de010 | 715 | |
2c0b251b | 716 | static void |
09e2d7c7 | 717 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
718 | LONGEST offset) |
719 | { | |
09e2d7c7 | 720 | struct type *self; |
0d5de010 DJ |
721 | unsigned int i; |
722 | unsigned len; | |
723 | ||
09e2d7c7 DE |
724 | *self_p = check_typedef (*self_p); |
725 | self = *self_p; | |
726 | len = TYPE_NFIELDS (self); | |
0d5de010 | 727 | |
09e2d7c7 | 728 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 729 | { |
09e2d7c7 | 730 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
731 | |
732 | QUIT; | |
733 | if (offset == bitpos) | |
734 | { | |
735 | *fieldno = i; | |
736 | return; | |
737 | } | |
738 | } | |
739 | ||
09e2d7c7 | 740 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 741 | { |
09e2d7c7 DE |
742 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
743 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
744 | |
745 | if (offset >= bitpos && offset < bitpos + bitsize) | |
746 | { | |
09e2d7c7 DE |
747 | *self_p = TYPE_FIELD_TYPE (self, i); |
748 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
749 | return; |
750 | } | |
751 | } | |
752 | ||
09e2d7c7 | 753 | *self_p = NULL; |
0d5de010 DJ |
754 | } |
755 | ||
c906108c | 756 | void |
ad4820ab | 757 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 758 | struct ui_file *stream, const char *prefix) |
c906108c | 759 | { |
e17a4113 UW |
760 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
761 | ||
09e2d7c7 | 762 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
763 | Find the name of the field for that offset and |
764 | print it. */ | |
09e2d7c7 | 765 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 766 | LONGEST val; |
9f8afa72 | 767 | int fieldno; |
c906108c | 768 | |
aff410f1 MS |
769 | val = extract_signed_integer (valaddr, |
770 | TYPE_LENGTH (type), | |
771 | byte_order); | |
e17a4113 | 772 | |
0d5de010 DJ |
773 | /* Pointers to data members are usually byte offsets into an object. |
774 | Because a data member can have offset zero, and a NULL pointer to | |
775 | member must be distinct from any valid non-NULL pointer to | |
776 | member, either the value is biased or the NULL value has a | |
777 | special representation; both are permitted by ISO C++. HP aCC | |
778 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
779 | and other compilers which use the Itanium ABI use -1 as the NULL | |
780 | value. GDB only supports that last form; to add support for | |
781 | another form, make this into a cp-abi hook. */ | |
c906108c | 782 | |
0d5de010 | 783 | if (val == -1) |
c906108c | 784 | { |
0d5de010 DJ |
785 | fprintf_filtered (stream, "NULL"); |
786 | return; | |
c906108c | 787 | } |
0d5de010 | 788 | |
09e2d7c7 | 789 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 790 | |
09e2d7c7 | 791 | if (self_type != NULL) |
c906108c | 792 | { |
0d5cff50 | 793 | const char *name; |
c5504eaf | 794 | |
306d9ac5 | 795 | fputs_filtered (prefix, stream); |
09e2d7c7 | 796 | name = type_name_no_tag (self_type); |
c906108c | 797 | if (name) |
c5aa993b | 798 | fputs_filtered (name, stream); |
c906108c | 799 | else |
09e2d7c7 | 800 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 801 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 802 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
803 | } |
804 | else | |
0d5de010 | 805 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
806 | } |
807 | ||
808 | ||
c906108c | 809 | void |
fba45db2 | 810 | _initialize_cp_valprint (void) |
c906108c | 811 | { |
5bf193a2 | 812 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 813 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
814 | Set printing of C++ static members."), _("\ |
815 | Show printing of C++ static members."), NULL, | |
816 | NULL, | |
920d2a44 | 817 | show_static_field_print, |
5bf193a2 | 818 | &setprintlist, &showprintlist); |
c906108c | 819 | |
79a45b7d TT |
820 | add_setshow_boolean_cmd ("vtbl", class_support, |
821 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
822 | Set printing of C++ virtual function tables."), _("\ |
823 | Show printing of C++ virtual function tables."), NULL, | |
824 | NULL, | |
920d2a44 | 825 | show_vtblprint, |
5bf193a2 AC |
826 | &setprintlist, &showprintlist); |
827 | ||
79a45b7d TT |
828 | add_setshow_boolean_cmd ("object", class_support, |
829 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
830 | Set printing of object's derived type based on vtable info."), _("\ |
831 | Show printing of object's derived type based on vtable info."), NULL, | |
832 | NULL, | |
920d2a44 | 833 | show_objectprint, |
5bf193a2 | 834 | &setprintlist, &showprintlist); |
c906108c | 835 | |
aff410f1 MS |
836 | obstack_begin (&dont_print_stat_array_obstack, |
837 | 32 * sizeof (struct type *)); | |
838 | obstack_begin (&dont_print_statmem_obstack, | |
839 | 32 * sizeof (CORE_ADDR)); | |
840 | obstack_begin (&dont_print_vb_obstack, | |
841 | 32 * sizeof (struct type *)); | |
c906108c | 842 | } |