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 | |
6943961c | 77 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
78 | struct ui_file *, int, |
79 | const struct value_print_options *); | |
c906108c | 80 | |
aff410f1 | 81 | static void cp_print_value (struct type *, struct type *, |
65408fa6 | 82 | LONGEST, |
aff410f1 | 83 | CORE_ADDR, struct ui_file *, |
e8b24d9f | 84 | int, struct value *, |
aff410f1 MS |
85 | const struct value_print_options *, |
86 | struct type **); | |
c906108c | 87 | |
c906108c | 88 | |
8343f86c | 89 | /* GCC versions after 2.4.5 use this. */ |
ddb6d633 | 90 | extern const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 91 | |
c906108c SS |
92 | /* Return truth value for assertion that TYPE is of the type |
93 | "pointer to virtual function". */ | |
94 | ||
95 | int | |
fba45db2 | 96 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 97 | { |
fe978cb0 | 98 | const char *type_name = type_name_no_tag (type); |
c906108c | 99 | |
fe978cb0 | 100 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
101 | } |
102 | ||
103 | /* Return truth value for the assertion that TYPE is of the type | |
104 | "pointer to virtual function table". */ | |
105 | ||
106 | int | |
fba45db2 | 107 | cp_is_vtbl_member (struct type *type) |
c906108c | 108 | { |
aff410f1 MS |
109 | /* With older versions of g++, the vtbl field pointed to an array of |
110 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
111 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
112 | { | |
113 | type = TYPE_TARGET_TYPE (type); | |
114 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
115 | { | |
116 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
117 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
118 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
119 | { |
120 | /* Virtual functions tables are full of pointers | |
aff410f1 | 121 | to virtual functions. */ |
c906108c SS |
122 | return cp_is_vtbl_ptr_type (type); |
123 | } | |
124 | } | |
0e5e3ea6 PS |
125 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
126 | { | |
127 | return cp_is_vtbl_ptr_type (type); | |
128 | } | |
129 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
130 | { | |
aff410f1 MS |
131 | /* The type name of the thunk pointer is NULL when using |
132 | dwarf2. We could test for a pointer to a function, but | |
133 | there is no type info for the virtual table either, so it | |
134 | wont help. */ | |
0e5e3ea6 PS |
135 | return cp_is_vtbl_ptr_type (type); |
136 | } | |
c906108c SS |
137 | } |
138 | return 0; | |
139 | } | |
140 | ||
141 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
142 | print out a structure's fields: cp_print_value_fields and |
143 | cp_print_value. | |
c5aa993b | 144 | |
aff410f1 MS |
145 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
146 | meanings as in cp_print_value and c_val_print. | |
c906108c | 147 | |
aff410f1 MS |
148 | 2nd argument REAL_TYPE is used to carry over the type of the |
149 | derived class across the recursion to base classes. | |
c906108c | 150 | |
aff410f1 MS |
151 | DONT_PRINT is an array of baseclass types that we should not print, |
152 | or zero if called from top level. */ | |
c906108c SS |
153 | |
154 | void | |
a2bd3dcd | 155 | cp_print_value_fields (struct type *type, struct type *real_type, |
65408fa6 | 156 | LONGEST offset, |
aff410f1 | 157 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 158 | int recurse, struct value *val, |
79a45b7d | 159 | const struct value_print_options *options, |
aff410f1 MS |
160 | struct type **dont_print_vb, |
161 | int dont_print_statmem) | |
c906108c SS |
162 | { |
163 | int i, len, n_baseclasses; | |
c906108c | 164 | int fields_seen = 0; |
ec31cde5 | 165 | static int last_set_recurse = -1; |
c906108c | 166 | |
f168693b | 167 | type = check_typedef (type); |
99903ae3 | 168 | |
ec31cde5 CM |
169 | if (recurse == 0) |
170 | { | |
aff410f1 MS |
171 | /* Any object can be left on obstacks only during an unexpected |
172 | error. */ | |
6036c742 | 173 | |
ec31cde5 | 174 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
175 | { |
176 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
177 | obstack_begin (&dont_print_statmem_obstack, |
178 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 179 | } |
ec31cde5 | 180 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
181 | { |
182 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
183 | obstack_begin (&dont_print_stat_array_obstack, | |
184 | 32 * sizeof (struct type *)); | |
185 | } | |
ec31cde5 | 186 | } |
c906108c SS |
187 | |
188 | fprintf_filtered (stream, "{"); | |
189 | len = TYPE_NFIELDS (type); | |
190 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
191 | ||
192 | /* First, print out baseclasses such that we don't print | |
193 | duplicates of virtual baseclasses. */ | |
194 | ||
195 | if (n_baseclasses > 0) | |
65408fa6 | 196 | cp_print_value (type, real_type, |
aff410f1 MS |
197 | offset, address, stream, |
198 | recurse + 1, val, options, | |
199 | dont_print_vb); | |
c906108c SS |
200 | |
201 | /* Second, print out data fields */ | |
202 | ||
086280be UW |
203 | /* If there are no data fields, skip this part */ |
204 | if (len == n_baseclasses || !len) | |
c906108c SS |
205 | fprintf_filtered (stream, "<No data fields>"); |
206 | else | |
207 | { | |
241fd515 AM |
208 | size_t statmem_obstack_initial_size = 0; |
209 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
210 | struct type *vptr_basetype = NULL; |
211 | int vptr_fieldno; | |
212 | ||
c906108c SS |
213 | if (dont_print_statmem == 0) |
214 | { | |
f56dcb88 | 215 | statmem_obstack_initial_size = |
0b66f317 | 216 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
217 | |
218 | if (last_set_recurse != recurse) | |
219 | { | |
f56dcb88 CM |
220 | stat_array_obstack_initial_size = |
221 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 222 | |
ec31cde5 CM |
223 | last_set_recurse = recurse; |
224 | } | |
c906108c SS |
225 | } |
226 | ||
7977e5d2 | 227 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
228 | for (i = n_baseclasses; i < len; i++) |
229 | { | |
65408fa6 YQ |
230 | const gdb_byte *valaddr = value_contents_for_printing (val); |
231 | ||
c906108c | 232 | /* If requested, skip printing of static fields. */ |
79a45b7d | 233 | if (!options->static_field_print |
d6a843b5 | 234 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
235 | continue; |
236 | ||
c906108c SS |
237 | if (fields_seen) |
238 | fprintf_filtered (stream, ", "); | |
239 | else if (n_baseclasses > 0) | |
240 | { | |
2a998fc0 | 241 | if (options->prettyformat) |
c906108c SS |
242 | { |
243 | fprintf_filtered (stream, "\n"); | |
244 | print_spaces_filtered (2 + 2 * recurse, stream); | |
245 | fputs_filtered ("members of ", stream); | |
246 | fputs_filtered (type_name_no_tag (type), stream); | |
247 | fputs_filtered (": ", stream); | |
248 | } | |
249 | } | |
250 | fields_seen = 1; | |
251 | ||
2a998fc0 | 252 | if (options->prettyformat) |
c906108c SS |
253 | { |
254 | fprintf_filtered (stream, "\n"); | |
255 | print_spaces_filtered (2 + 2 * recurse, stream); | |
256 | } | |
c5aa993b | 257 | else |
c906108c SS |
258 | { |
259 | wrap_here (n_spaces (2 + 2 * recurse)); | |
260 | } | |
e93a8774 TT |
261 | |
262 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
263 | ||
264 | if (field_is_static (&TYPE_FIELD (type, i))) | |
265 | fputs_filtered ("static ", stream); | |
266 | fprintf_symbol_filtered (stream, | |
267 | TYPE_FIELD_NAME (type, i), | |
268 | current_language->la_language, | |
269 | DMGL_PARAMS | DMGL_ANSI); | |
270 | annotate_field_name_end (); | |
271 | /* Do not print leading '=' in case of anonymous | |
272 | unions. */ | |
273 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
274 | fputs_filtered (" = ", stream); | |
275 | annotate_field_value (); | |
c906108c | 276 | |
d6a843b5 JK |
277 | if (!field_is_static (&TYPE_FIELD (type, i)) |
278 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 279 | { |
6943961c | 280 | struct value *v; |
c906108c | 281 | |
aff410f1 MS |
282 | /* Bitfields require special handling, especially due to |
283 | byte order problems. */ | |
c906108c SS |
284 | if (TYPE_FIELD_IGNORE (type, i)) |
285 | { | |
c5aa993b | 286 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 287 | } |
8cf6f0b1 TT |
288 | else if (value_bits_synthetic_pointer (val, |
289 | TYPE_FIELD_BITPOS (type, | |
290 | i), | |
291 | TYPE_FIELD_BITSIZE (type, | |
292 | i))) | |
293 | { | |
294 | fputs_filtered (_("<synthetic pointer>"), stream); | |
295 | } | |
c906108c SS |
296 | else |
297 | { | |
79a45b7d | 298 | struct value_print_options opts = *options; |
c5504eaf | 299 | |
79a45b7d | 300 | opts.deref_ref = 0; |
5467c6c8 PA |
301 | |
302 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 303 | |
79a45b7d | 304 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 305 | current_language); |
c906108c SS |
306 | } |
307 | } | |
308 | else | |
309 | { | |
310 | if (TYPE_FIELD_IGNORE (type, i)) | |
311 | { | |
aff410f1 MS |
312 | fputs_filtered ("<optimized out or zero length>", |
313 | stream); | |
c906108c | 314 | } |
d6a843b5 | 315 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 316 | { |
ee86786c TT |
317 | struct value *v = NULL; |
318 | ||
492d29ea | 319 | TRY |
ee86786c TT |
320 | { |
321 | v = value_static_field (type, i); | |
322 | } | |
323 | ||
492d29ea PA |
324 | CATCH (ex, RETURN_MASK_ERROR) |
325 | { | |
326 | fprintf_filtered (stream, | |
327 | _("<error reading variable: %s>"), | |
328 | ex.message); | |
329 | } | |
330 | END_CATCH | |
331 | ||
686d4def PA |
332 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
333 | v, stream, recurse + 1, | |
334 | options); | |
c906108c | 335 | } |
7977e5d2 | 336 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 337 | { |
a72c8f6a JK |
338 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
339 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
340 | ||
341 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
342 | { | |
343 | CORE_ADDR addr; | |
344 | ||
345 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
edf0c1b7 TT |
346 | print_function_pointer_address (options, |
347 | get_type_arch (type), | |
348 | addr, stream); | |
a72c8f6a | 349 | } |
410528f0 | 350 | } |
c906108c SS |
351 | else |
352 | { | |
79a45b7d | 353 | struct value_print_options opts = *options; |
c5504eaf | 354 | |
79a45b7d | 355 | opts.deref_ref = 0; |
c5aa993b | 356 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 357 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 358 | address, |
0e03807e | 359 | stream, recurse + 1, val, &opts, |
d8ca156b | 360 | current_language); |
c906108c SS |
361 | } |
362 | } | |
363 | annotate_field_end (); | |
364 | } | |
365 | ||
366 | if (dont_print_statmem == 0) | |
367 | { | |
241fd515 | 368 | size_t obstack_final_size = |
0b66f317 CM |
369 | obstack_object_size (&dont_print_statmem_obstack); |
370 | ||
aff410f1 MS |
371 | if (obstack_final_size > statmem_obstack_initial_size) |
372 | { | |
373 | /* In effect, a pop of the printed-statics stack. */ | |
a43f3893 PF |
374 | size_t shrink_bytes |
375 | = statmem_obstack_initial_size - obstack_final_size; | |
376 | obstack_blank_fast (&dont_print_statmem_obstack, shrink_bytes); | |
aff410f1 | 377 | } |
ec31cde5 CM |
378 | |
379 | if (last_set_recurse != recurse) | |
380 | { | |
241fd515 | 381 | size_t obstack_final_size = |
f56dcb88 CM |
382 | obstack_object_size (&dont_print_stat_array_obstack); |
383 | ||
384 | if (obstack_final_size > stat_array_obstack_initial_size) | |
385 | { | |
386 | void *free_to_ptr = | |
1ae1b8cc | 387 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
388 | - (obstack_final_size |
389 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
390 | |
391 | obstack_free (&dont_print_stat_array_obstack, | |
392 | free_to_ptr); | |
393 | } | |
ec31cde5 CM |
394 | last_set_recurse = -1; |
395 | } | |
c906108c SS |
396 | } |
397 | ||
2a998fc0 | 398 | if (options->prettyformat) |
c906108c SS |
399 | { |
400 | fprintf_filtered (stream, "\n"); | |
401 | print_spaces_filtered (2 * recurse, stream); | |
402 | } | |
c5aa993b | 403 | } /* if there are data fields */ |
c5aa993b | 404 | |
c906108c SS |
405 | fprintf_filtered (stream, "}"); |
406 | } | |
407 | ||
edf3d5f3 TT |
408 | /* Like cp_print_value_fields, but find the runtime type of the object |
409 | and pass it as the `real_type' argument to cp_print_value_fields. | |
410 | This function is a hack to work around the fact that | |
411 | common_val_print passes the embedded offset to val_print, but not | |
412 | the enclosing type. */ | |
413 | ||
414 | void | |
415 | cp_print_value_fields_rtti (struct type *type, | |
6b850546 | 416 | const gdb_byte *valaddr, LONGEST offset, |
edf3d5f3 TT |
417 | CORE_ADDR address, |
418 | struct ui_file *stream, int recurse, | |
e8b24d9f | 419 | struct value *val, |
edf3d5f3 | 420 | const struct value_print_options *options, |
c5504eaf MS |
421 | struct type **dont_print_vb, |
422 | int dont_print_statmem) | |
edf3d5f3 | 423 | { |
0e03807e TT |
424 | struct type *real_type = NULL; |
425 | ||
426 | /* We require all bits to be valid in order to attempt a | |
427 | conversion. */ | |
9a0dc9e3 PA |
428 | if (!value_bits_any_optimized_out (val, |
429 | TARGET_CHAR_BIT * offset, | |
430 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
431 | { |
432 | struct value *value; | |
6b850546 DT |
433 | int full, using_enc; |
434 | LONGEST top; | |
0e03807e TT |
435 | |
436 | /* Ugh, we have to convert back to a value here. */ | |
437 | value = value_from_contents_and_address (type, valaddr + offset, | |
438 | address + offset); | |
9f1f738a | 439 | type = value_type (value); |
aff410f1 MS |
440 | /* We don't actually care about most of the result here -- just |
441 | the type. We already have the correct offset, due to how | |
442 | val_print was initially called. */ | |
0e03807e TT |
443 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
444 | } | |
445 | ||
edf3d5f3 TT |
446 | if (!real_type) |
447 | real_type = type; | |
448 | ||
65408fa6 | 449 | cp_print_value_fields (type, real_type, offset, |
0e03807e | 450 | address, stream, recurse, val, options, |
edf3d5f3 TT |
451 | dont_print_vb, dont_print_statmem); |
452 | } | |
453 | ||
aff410f1 MS |
454 | /* Special val_print routine to avoid printing multiple copies of |
455 | virtual baseclasses. */ | |
c906108c SS |
456 | |
457 | static void | |
a2bd3dcd | 458 | cp_print_value (struct type *type, struct type *real_type, |
65408fa6 | 459 | LONGEST offset, |
aff410f1 | 460 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 461 | int recurse, struct value *val, |
79a45b7d TT |
462 | const struct value_print_options *options, |
463 | struct type **dont_print_vb) | |
c906108c | 464 | { |
c906108c | 465 | struct type **last_dont_print |
2c63a960 | 466 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 467 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 468 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
6b850546 | 469 | LONGEST thisoffset; |
b9d652ac | 470 | struct type *thistype; |
65408fa6 | 471 | const gdb_byte *valaddr = value_contents_for_printing (val); |
c906108c SS |
472 | |
473 | if (dont_print_vb == 0) | |
474 | { | |
aff410f1 MS |
475 | /* If we're at top level, carve out a completely fresh chunk of |
476 | the obstack and use that until this particular invocation | |
477 | returns. */ | |
c906108c SS |
478 | /* Bump up the high-water mark. Now alpha is omega. */ |
479 | obstack_finish (&dont_print_vb_obstack); | |
480 | } | |
481 | ||
482 | for (i = 0; i < n_baseclasses; i++) | |
483 | { | |
6b850546 | 484 | LONGEST boffset = 0; |
7556d4a4 | 485 | int skip = 0; |
c906108c | 486 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 487 | const char *basename = TYPE_NAME (baseclass); |
e8b24d9f | 488 | struct value *base_val = NULL; |
c906108c SS |
489 | |
490 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
491 | { | |
492 | struct type **first_dont_print | |
2c63a960 | 493 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 494 | |
aff410f1 MS |
495 | int j = (struct type **) |
496 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
497 | |
498 | while (--j >= 0) | |
499 | if (baseclass == first_dont_print[j]) | |
500 | goto flush_it; | |
501 | ||
502 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
503 | } | |
504 | ||
b9d652ac DJ |
505 | thisoffset = offset; |
506 | thistype = real_type; | |
086280be | 507 | |
492d29ea | 508 | TRY |
c5aa993b | 509 | { |
8af8e3bc PA |
510 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
511 | } | |
492d29ea | 512 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
513 | { |
514 | if (ex.error == NOT_AVAILABLE_ERROR) | |
515 | skip = -1; | |
516 | else | |
517 | skip = 1; | |
518 | } | |
492d29ea | 519 | END_CATCH |
c906108c | 520 | |
7556d4a4 PA |
521 | if (skip == 0) |
522 | { | |
8af8e3bc | 523 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 524 | { |
8af8e3bc PA |
525 | /* The virtual base class pointer might have been |
526 | clobbered by the user program. Make sure that it | |
527 | still points to a valid memory location. */ | |
528 | ||
529 | if ((boffset + offset) < 0 | |
530 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
531 | { | |
26fcd5d7 | 532 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); |
d5161074 | 533 | |
26fcd5d7 | 534 | if (target_read_memory (address + boffset, buf.data (), |
8af8e3bc PA |
535 | TYPE_LENGTH (baseclass)) != 0) |
536 | skip = 1; | |
537 | base_val = value_from_contents_and_address (baseclass, | |
26fcd5d7 | 538 | buf.data (), |
8af8e3bc | 539 | address + boffset); |
9f1f738a | 540 | baseclass = value_type (base_val); |
8af8e3bc PA |
541 | thisoffset = 0; |
542 | boffset = 0; | |
543 | thistype = baseclass; | |
8af8e3bc PA |
544 | } |
545 | else | |
546 | { | |
8af8e3bc PA |
547 | base_val = val; |
548 | } | |
c5aa993b JM |
549 | } |
550 | else | |
de4127a3 | 551 | { |
de4127a3 PA |
552 | base_val = val; |
553 | } | |
c906108c SS |
554 | } |
555 | ||
aff410f1 | 556 | /* Now do the printing. */ |
2a998fc0 | 557 | if (options->prettyformat) |
c906108c SS |
558 | { |
559 | fprintf_filtered (stream, "\n"); | |
560 | print_spaces_filtered (2 * recurse, stream); | |
561 | } | |
562 | fputs_filtered ("<", stream); | |
aff410f1 MS |
563 | /* Not sure what the best notation is in the case where there is |
564 | no baseclass name. */ | |
c906108c SS |
565 | fputs_filtered (basename ? basename : "", stream); |
566 | fputs_filtered ("> = ", stream); | |
567 | ||
8af8e3bc PA |
568 | if (skip < 0) |
569 | val_print_unavailable (stream); | |
570 | else if (skip > 0) | |
571 | val_print_invalid_address (stream); | |
c906108c | 572 | else |
a6bac58e TT |
573 | { |
574 | int result = 0; | |
575 | ||
6dddc817 | 576 | /* Attempt to run an extension language pretty-printer on the |
a6bac58e TT |
577 | baseclass if possible. */ |
578 | if (!options->raw) | |
6dddc817 | 579 | result |
668e1674 | 580 | = apply_ext_lang_val_pretty_printer (baseclass, |
6dddc817 DE |
581 | thisoffset + boffset, |
582 | value_address (base_val), | |
583 | stream, recurse, | |
584 | base_val, options, | |
585 | current_language); | |
de4127a3 | 586 | |
a6bac58e | 587 | if (!result) |
65408fa6 | 588 | cp_print_value_fields (baseclass, thistype, |
de4127a3 PA |
589 | thisoffset + boffset, |
590 | value_address (base_val), | |
591 | stream, recurse, base_val, options, | |
a6bac58e TT |
592 | ((struct type **) |
593 | obstack_base (&dont_print_vb_obstack)), | |
594 | 0); | |
595 | } | |
c906108c SS |
596 | fputs_filtered (", ", stream); |
597 | ||
598 | flush_it: | |
599 | ; | |
600 | } | |
601 | ||
602 | if (dont_print_vb == 0) | |
603 | { | |
604 | /* Free the space used to deal with the printing | |
c5aa993b | 605 | of this type from top level. */ |
c906108c SS |
606 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
607 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 608 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
609 | dont_print_vb_obstack = tmp_obstack; |
610 | } | |
611 | } | |
612 | ||
aff410f1 MS |
613 | /* Print value of a static member. To avoid infinite recursion when |
614 | printing a class that contains a static instance of the class, we | |
615 | keep the addresses of all printed static member classes in an | |
616 | obstack and refuse to print them more than once. | |
c906108c | 617 | |
79a45b7d | 618 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
619 | have the same meanings as in c_val_print. */ |
620 | ||
621 | static void | |
2c63a960 | 622 | cp_print_static_field (struct type *type, |
6943961c | 623 | struct value *val, |
2c63a960 | 624 | struct ui_file *stream, |
2c63a960 | 625 | int recurse, |
79a45b7d | 626 | const struct value_print_options *options) |
c906108c | 627 | { |
79a45b7d | 628 | struct value_print_options opts; |
686d4def PA |
629 | |
630 | if (value_entirely_optimized_out (val)) | |
631 | { | |
632 | val_print_optimized_out (val, stream); | |
633 | return; | |
634 | } | |
635 | ||
c906108c SS |
636 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
637 | { | |
638 | CORE_ADDR *first_dont_print; | |
42ae5230 | 639 | CORE_ADDR addr; |
c906108c SS |
640 | int i; |
641 | ||
642 | first_dont_print | |
c5aa993b | 643 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
644 | i = obstack_object_size (&dont_print_statmem_obstack) |
645 | / sizeof (CORE_ADDR); | |
c906108c SS |
646 | |
647 | while (--i >= 0) | |
648 | { | |
42ae5230 | 649 | if (value_address (val) == first_dont_print[i]) |
c906108c | 650 | { |
2c63a960 JB |
651 | fputs_filtered ("<same as static member of an already" |
652 | " seen type>", | |
c906108c SS |
653 | stream); |
654 | return; | |
655 | } | |
656 | } | |
657 | ||
42ae5230 TT |
658 | addr = value_address (val); |
659 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 660 | sizeof (CORE_ADDR)); |
f168693b | 661 | type = check_typedef (type); |
edf3d5f3 | 662 | cp_print_value_fields (type, value_enclosing_type (val), |
42ae5230 | 663 | value_embedded_offset (val), addr, |
aff410f1 MS |
664 | stream, recurse, val, |
665 | options, NULL, 1); | |
c906108c SS |
666 | return; |
667 | } | |
79a45b7d | 668 | |
ec31cde5 CM |
669 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
670 | { | |
671 | struct type **first_dont_print; | |
672 | int i; | |
673 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
674 | ||
675 | first_dont_print | |
676 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
677 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 678 | / sizeof (struct type *); |
ec31cde5 CM |
679 | |
680 | while (--i >= 0) | |
681 | { | |
682 | if (target_type == first_dont_print[i]) | |
683 | { | |
684 | fputs_filtered ("<same as static member of an already" | |
685 | " seen type>", | |
686 | stream); | |
687 | return; | |
688 | } | |
689 | } | |
690 | ||
aff410f1 MS |
691 | obstack_grow (&dont_print_stat_array_obstack, |
692 | (char *) &target_type, | |
ec31cde5 CM |
693 | sizeof (struct type *)); |
694 | } | |
695 | ||
79a45b7d TT |
696 | opts = *options; |
697 | opts.deref_ref = 0; | |
e8b24d9f | 698 | val_print (type, |
aff410f1 MS |
699 | value_embedded_offset (val), |
700 | value_address (val), | |
701 | stream, recurse, val, | |
702 | &opts, current_language); | |
c906108c SS |
703 | } |
704 | ||
09e2d7c7 DE |
705 | /* Find the field in *SELF, or its non-virtual base classes, with |
706 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 707 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 708 | start of some field, set *SELF to NULL. */ |
0d5de010 | 709 | |
2c0b251b | 710 | static void |
09e2d7c7 | 711 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
712 | LONGEST offset) |
713 | { | |
09e2d7c7 | 714 | struct type *self; |
0d5de010 DJ |
715 | unsigned int i; |
716 | unsigned len; | |
717 | ||
09e2d7c7 DE |
718 | *self_p = check_typedef (*self_p); |
719 | self = *self_p; | |
720 | len = TYPE_NFIELDS (self); | |
0d5de010 | 721 | |
09e2d7c7 | 722 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 723 | { |
09e2d7c7 | 724 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
725 | |
726 | QUIT; | |
727 | if (offset == bitpos) | |
728 | { | |
729 | *fieldno = i; | |
730 | return; | |
731 | } | |
732 | } | |
733 | ||
09e2d7c7 | 734 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 735 | { |
09e2d7c7 DE |
736 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
737 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
738 | |
739 | if (offset >= bitpos && offset < bitpos + bitsize) | |
740 | { | |
09e2d7c7 DE |
741 | *self_p = TYPE_FIELD_TYPE (self, i); |
742 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
743 | return; |
744 | } | |
745 | } | |
746 | ||
09e2d7c7 | 747 | *self_p = NULL; |
0d5de010 DJ |
748 | } |
749 | ||
c906108c | 750 | void |
ad4820ab | 751 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 752 | struct ui_file *stream, const char *prefix) |
c906108c | 753 | { |
e17a4113 UW |
754 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
755 | ||
09e2d7c7 | 756 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
757 | Find the name of the field for that offset and |
758 | print it. */ | |
09e2d7c7 | 759 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 760 | LONGEST val; |
9f8afa72 | 761 | int fieldno; |
c906108c | 762 | |
aff410f1 MS |
763 | val = extract_signed_integer (valaddr, |
764 | TYPE_LENGTH (type), | |
765 | byte_order); | |
e17a4113 | 766 | |
0d5de010 DJ |
767 | /* Pointers to data members are usually byte offsets into an object. |
768 | Because a data member can have offset zero, and a NULL pointer to | |
769 | member must be distinct from any valid non-NULL pointer to | |
770 | member, either the value is biased or the NULL value has a | |
771 | special representation; both are permitted by ISO C++. HP aCC | |
772 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
773 | and other compilers which use the Itanium ABI use -1 as the NULL | |
774 | value. GDB only supports that last form; to add support for | |
775 | another form, make this into a cp-abi hook. */ | |
c906108c | 776 | |
0d5de010 | 777 | if (val == -1) |
c906108c | 778 | { |
0d5de010 DJ |
779 | fprintf_filtered (stream, "NULL"); |
780 | return; | |
c906108c | 781 | } |
0d5de010 | 782 | |
09e2d7c7 | 783 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 784 | |
09e2d7c7 | 785 | if (self_type != NULL) |
c906108c | 786 | { |
0d5cff50 | 787 | const char *name; |
c5504eaf | 788 | |
306d9ac5 | 789 | fputs_filtered (prefix, stream); |
09e2d7c7 | 790 | name = type_name_no_tag (self_type); |
c906108c | 791 | if (name) |
c5aa993b | 792 | fputs_filtered (name, stream); |
c906108c | 793 | else |
09e2d7c7 | 794 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 795 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 796 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
797 | } |
798 | else | |
0d5de010 | 799 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
800 | } |
801 | ||
802 | ||
c906108c | 803 | void |
fba45db2 | 804 | _initialize_cp_valprint (void) |
c906108c | 805 | { |
5bf193a2 | 806 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 807 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
808 | Set printing of C++ static members."), _("\ |
809 | Show printing of C++ static members."), NULL, | |
810 | NULL, | |
920d2a44 | 811 | show_static_field_print, |
5bf193a2 | 812 | &setprintlist, &showprintlist); |
c906108c | 813 | |
79a45b7d TT |
814 | add_setshow_boolean_cmd ("vtbl", class_support, |
815 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
816 | Set printing of C++ virtual function tables."), _("\ |
817 | Show printing of C++ virtual function tables."), NULL, | |
818 | NULL, | |
920d2a44 | 819 | show_vtblprint, |
5bf193a2 AC |
820 | &setprintlist, &showprintlist); |
821 | ||
79a45b7d TT |
822 | add_setshow_boolean_cmd ("object", class_support, |
823 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
824 | Set printing of object's derived type based on vtable info."), _("\ |
825 | Show printing of object's derived type based on vtable info."), NULL, | |
826 | NULL, | |
920d2a44 | 827 | show_objectprint, |
5bf193a2 | 828 | &setprintlist, &showprintlist); |
c906108c | 829 | |
aff410f1 MS |
830 | obstack_begin (&dont_print_stat_array_obstack, |
831 | 32 * sizeof (struct type *)); | |
832 | obstack_begin (&dont_print_statmem_obstack, | |
833 | 32 * sizeof (CORE_ADDR)); | |
834 | obstack_begin (&dont_print_vb_obstack, | |
835 | 32 * sizeof (struct type *)); | |
c906108c | 836 | } |