Commit | Line | Data |
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c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
42a4f53d | 3 | Copyright (C) 1986-2019 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" | |
4de283e4 TT |
21 | #include "gdb_obstack.h" |
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" | |
c906108c | 29 | #include "annotate.h" |
c906108c | 30 | #include "c-lang.h" |
4de283e4 | 31 | #include "target.h" |
b9d652ac | 32 | #include "cp-abi.h" |
4de283e4 | 33 | #include "valprint.h" |
d3cbe7ef | 34 | #include "cp-support.h" |
d55e5aa6 | 35 | #include "language.h" |
4de283e4 | 36 | #include "extension.h" |
79d43c61 | 37 | #include "typeprint.h" |
4de283e4 | 38 | #include "common/byte-vector.h" |
c906108c | 39 | |
c906108c SS |
40 | static struct obstack dont_print_vb_obstack; |
41 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 42 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 43 | |
6943961c | 44 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
45 | struct ui_file *, int, |
46 | const struct value_print_options *); | |
c906108c | 47 | |
aff410f1 | 48 | static void cp_print_value (struct type *, struct type *, |
65408fa6 | 49 | LONGEST, |
aff410f1 | 50 | CORE_ADDR, struct ui_file *, |
e8b24d9f | 51 | int, struct value *, |
aff410f1 MS |
52 | const struct value_print_options *, |
53 | struct type **); | |
c906108c | 54 | |
c906108c | 55 | |
8343f86c | 56 | /* GCC versions after 2.4.5 use this. */ |
ddb6d633 | 57 | extern const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 58 | |
c906108c SS |
59 | /* Return truth value for assertion that TYPE is of the type |
60 | "pointer to virtual function". */ | |
61 | ||
62 | int | |
fba45db2 | 63 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c | 64 | { |
a737d952 | 65 | const char *type_name = TYPE_NAME (type); |
c906108c | 66 | |
fe978cb0 | 67 | return (type_name != NULL && !strcmp (type_name, vtbl_ptr_name)); |
c906108c SS |
68 | } |
69 | ||
70 | /* Return truth value for the assertion that TYPE is of the type | |
71 | "pointer to virtual function table". */ | |
72 | ||
73 | int | |
fba45db2 | 74 | cp_is_vtbl_member (struct type *type) |
c906108c | 75 | { |
aff410f1 MS |
76 | /* With older versions of g++, the vtbl field pointed to an array of |
77 | structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
78 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
79 | { | |
80 | type = TYPE_TARGET_TYPE (type); | |
81 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
82 | { | |
83 | type = TYPE_TARGET_TYPE (type); | |
aff410f1 MS |
84 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
85 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
86 | { |
87 | /* Virtual functions tables are full of pointers | |
aff410f1 | 88 | to virtual functions. */ |
c906108c SS |
89 | return cp_is_vtbl_ptr_type (type); |
90 | } | |
91 | } | |
0e5e3ea6 PS |
92 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
93 | { | |
94 | return cp_is_vtbl_ptr_type (type); | |
95 | } | |
96 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
97 | { | |
aff410f1 MS |
98 | /* The type name of the thunk pointer is NULL when using |
99 | dwarf2. We could test for a pointer to a function, but | |
100 | there is no type info for the virtual table either, so it | |
101 | wont help. */ | |
0e5e3ea6 PS |
102 | return cp_is_vtbl_ptr_type (type); |
103 | } | |
c906108c SS |
104 | } |
105 | return 0; | |
106 | } | |
107 | ||
108 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
aff410f1 MS |
109 | print out a structure's fields: cp_print_value_fields and |
110 | cp_print_value. | |
c5aa993b | 111 | |
aff410f1 MS |
112 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the same |
113 | meanings as in cp_print_value and c_val_print. | |
c906108c | 114 | |
aff410f1 MS |
115 | 2nd argument REAL_TYPE is used to carry over the type of the |
116 | derived class across the recursion to base classes. | |
c906108c | 117 | |
aff410f1 MS |
118 | DONT_PRINT is an array of baseclass types that we should not print, |
119 | or zero if called from top level. */ | |
c906108c SS |
120 | |
121 | void | |
a2bd3dcd | 122 | cp_print_value_fields (struct type *type, struct type *real_type, |
65408fa6 | 123 | LONGEST offset, |
aff410f1 | 124 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 125 | int recurse, struct value *val, |
79a45b7d | 126 | const struct value_print_options *options, |
aff410f1 MS |
127 | struct type **dont_print_vb, |
128 | int dont_print_statmem) | |
c906108c SS |
129 | { |
130 | int i, len, n_baseclasses; | |
c906108c | 131 | int fields_seen = 0; |
ec31cde5 | 132 | static int last_set_recurse = -1; |
c906108c | 133 | |
f168693b | 134 | type = check_typedef (type); |
99903ae3 | 135 | |
ec31cde5 CM |
136 | if (recurse == 0) |
137 | { | |
aff410f1 MS |
138 | /* Any object can be left on obstacks only during an unexpected |
139 | error. */ | |
6036c742 | 140 | |
ec31cde5 | 141 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) |
6036c742 JK |
142 | { |
143 | obstack_free (&dont_print_statmem_obstack, NULL); | |
aff410f1 MS |
144 | obstack_begin (&dont_print_statmem_obstack, |
145 | 32 * sizeof (CORE_ADDR)); | |
6036c742 | 146 | } |
ec31cde5 | 147 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) |
6036c742 JK |
148 | { |
149 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
150 | obstack_begin (&dont_print_stat_array_obstack, | |
151 | 32 * sizeof (struct type *)); | |
152 | } | |
ec31cde5 | 153 | } |
c906108c SS |
154 | |
155 | fprintf_filtered (stream, "{"); | |
156 | len = TYPE_NFIELDS (type); | |
157 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
158 | ||
159 | /* First, print out baseclasses such that we don't print | |
160 | duplicates of virtual baseclasses. */ | |
161 | ||
162 | if (n_baseclasses > 0) | |
65408fa6 | 163 | cp_print_value (type, real_type, |
aff410f1 MS |
164 | offset, address, stream, |
165 | recurse + 1, val, options, | |
166 | dont_print_vb); | |
c906108c SS |
167 | |
168 | /* Second, print out data fields */ | |
169 | ||
086280be UW |
170 | /* If there are no data fields, skip this part */ |
171 | if (len == n_baseclasses || !len) | |
c906108c SS |
172 | fprintf_filtered (stream, "<No data fields>"); |
173 | else | |
174 | { | |
241fd515 AM |
175 | size_t statmem_obstack_initial_size = 0; |
176 | size_t stat_array_obstack_initial_size = 0; | |
7977e5d2 TT |
177 | struct type *vptr_basetype = NULL; |
178 | int vptr_fieldno; | |
179 | ||
c906108c SS |
180 | if (dont_print_statmem == 0) |
181 | { | |
f56dcb88 | 182 | statmem_obstack_initial_size = |
0b66f317 | 183 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
184 | |
185 | if (last_set_recurse != recurse) | |
186 | { | |
f56dcb88 CM |
187 | stat_array_obstack_initial_size = |
188 | obstack_object_size (&dont_print_stat_array_obstack); | |
c5504eaf | 189 | |
ec31cde5 CM |
190 | last_set_recurse = recurse; |
191 | } | |
c906108c SS |
192 | } |
193 | ||
7977e5d2 | 194 | vptr_fieldno = get_vptr_fieldno (type, &vptr_basetype); |
c906108c SS |
195 | for (i = n_baseclasses; i < len; i++) |
196 | { | |
65408fa6 YQ |
197 | const gdb_byte *valaddr = value_contents_for_printing (val); |
198 | ||
c906108c | 199 | /* If requested, skip printing of static fields. */ |
79a45b7d | 200 | if (!options->static_field_print |
d6a843b5 | 201 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
202 | continue; |
203 | ||
c906108c | 204 | if (fields_seen) |
18c77628 AB |
205 | { |
206 | fputs_filtered (",", stream); | |
207 | if (!options->prettyformat) | |
208 | fputs_filtered (" ", stream); | |
209 | } | |
c906108c SS |
210 | else if (n_baseclasses > 0) |
211 | { | |
2a998fc0 | 212 | if (options->prettyformat) |
c906108c SS |
213 | { |
214 | fprintf_filtered (stream, "\n"); | |
215 | print_spaces_filtered (2 + 2 * recurse, stream); | |
216 | fputs_filtered ("members of ", stream); | |
a737d952 | 217 | fputs_filtered (TYPE_NAME (type), stream); |
18c77628 | 218 | fputs_filtered (":", stream); |
c906108c SS |
219 | } |
220 | } | |
221 | fields_seen = 1; | |
222 | ||
2a998fc0 | 223 | if (options->prettyformat) |
c906108c SS |
224 | { |
225 | fprintf_filtered (stream, "\n"); | |
226 | print_spaces_filtered (2 + 2 * recurse, stream); | |
227 | } | |
c5aa993b | 228 | else |
c906108c SS |
229 | { |
230 | wrap_here (n_spaces (2 + 2 * recurse)); | |
231 | } | |
e93a8774 TT |
232 | |
233 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
234 | ||
235 | if (field_is_static (&TYPE_FIELD (type, i))) | |
236 | fputs_filtered ("static ", stream); | |
237 | fprintf_symbol_filtered (stream, | |
238 | TYPE_FIELD_NAME (type, i), | |
239 | current_language->la_language, | |
240 | DMGL_PARAMS | DMGL_ANSI); | |
241 | annotate_field_name_end (); | |
2e62ab40 AB |
242 | |
243 | /* We tweak various options in a few cases below. */ | |
244 | value_print_options options_copy = *options; | |
245 | value_print_options *opts = &options_copy; | |
246 | ||
e93a8774 TT |
247 | /* Do not print leading '=' in case of anonymous |
248 | unions. */ | |
249 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
250 | fputs_filtered (" = ", stream); | |
2e62ab40 AB |
251 | else |
252 | { | |
253 | /* If this is an anonymous field then we want to consider it | |
254 | as though it is at its parent's depth when it comes to the | |
255 | max print depth. */ | |
256 | if (opts->max_depth != -1 && opts->max_depth < INT_MAX) | |
257 | ++opts->max_depth; | |
258 | } | |
e93a8774 | 259 | annotate_field_value (); |
c906108c | 260 | |
d6a843b5 JK |
261 | if (!field_is_static (&TYPE_FIELD (type, i)) |
262 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 263 | { |
6943961c | 264 | struct value *v; |
c906108c | 265 | |
aff410f1 MS |
266 | /* Bitfields require special handling, especially due to |
267 | byte order problems. */ | |
c906108c SS |
268 | if (TYPE_FIELD_IGNORE (type, i)) |
269 | { | |
c5aa993b | 270 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 271 | } |
8cf6f0b1 TT |
272 | else if (value_bits_synthetic_pointer (val, |
273 | TYPE_FIELD_BITPOS (type, | |
274 | i), | |
275 | TYPE_FIELD_BITSIZE (type, | |
276 | i))) | |
277 | { | |
278 | fputs_filtered (_("<synthetic pointer>"), stream); | |
279 | } | |
c906108c SS |
280 | else |
281 | { | |
2e62ab40 | 282 | opts->deref_ref = 0; |
5467c6c8 PA |
283 | |
284 | v = value_field_bitfield (type, i, valaddr, offset, val); | |
c906108c | 285 | |
2e62ab40 AB |
286 | common_val_print (v, stream, recurse + 1, |
287 | opts, current_language); | |
c906108c SS |
288 | } |
289 | } | |
290 | else | |
291 | { | |
292 | if (TYPE_FIELD_IGNORE (type, i)) | |
293 | { | |
aff410f1 MS |
294 | fputs_filtered ("<optimized out or zero length>", |
295 | stream); | |
c906108c | 296 | } |
d6a843b5 | 297 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 298 | { |
a70b8144 | 299 | try |
ee86786c | 300 | { |
4330d61d | 301 | struct value *v = value_static_field (type, i); |
ee86786c | 302 | |
4330d61d TT |
303 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), |
304 | v, stream, recurse + 1, | |
3d507ff2 | 305 | opts); |
4330d61d | 306 | } |
230d2906 | 307 | catch (const gdb_exception_error &ex) |
492d29ea PA |
308 | { |
309 | fprintf_filtered (stream, | |
310 | _("<error reading variable: %s>"), | |
3d6e9d23 | 311 | ex.what ()); |
492d29ea | 312 | } |
c906108c | 313 | } |
7977e5d2 | 314 | else if (i == vptr_fieldno && type == vptr_basetype) |
410528f0 | 315 | { |
a72c8f6a JK |
316 | int i_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; |
317 | struct type *i_type = TYPE_FIELD_TYPE (type, i); | |
318 | ||
319 | if (valprint_check_validity (stream, i_type, i_offset, val)) | |
320 | { | |
321 | CORE_ADDR addr; | |
322 | ||
323 | addr = extract_typed_address (valaddr + i_offset, i_type); | |
2e62ab40 | 324 | print_function_pointer_address (opts, |
edf0c1b7 TT |
325 | get_type_arch (type), |
326 | addr, stream); | |
a72c8f6a | 327 | } |
410528f0 | 328 | } |
c906108c SS |
329 | else |
330 | { | |
2e62ab40 | 331 | opts->deref_ref = 0; |
c5aa993b | 332 | val_print (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 333 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 334 | address, |
2e62ab40 | 335 | stream, recurse + 1, val, opts, |
d8ca156b | 336 | current_language); |
c906108c SS |
337 | } |
338 | } | |
339 | annotate_field_end (); | |
340 | } | |
341 | ||
342 | if (dont_print_statmem == 0) | |
343 | { | |
241fd515 | 344 | size_t obstack_final_size = |
0b66f317 CM |
345 | obstack_object_size (&dont_print_statmem_obstack); |
346 | ||
aff410f1 MS |
347 | if (obstack_final_size > statmem_obstack_initial_size) |
348 | { | |
349 | /* In effect, a pop of the printed-statics stack. */ | |
a43f3893 PF |
350 | size_t shrink_bytes |
351 | = statmem_obstack_initial_size - obstack_final_size; | |
352 | obstack_blank_fast (&dont_print_statmem_obstack, shrink_bytes); | |
aff410f1 | 353 | } |
ec31cde5 CM |
354 | |
355 | if (last_set_recurse != recurse) | |
356 | { | |
b926417a | 357 | obstack_final_size = |
f56dcb88 CM |
358 | obstack_object_size (&dont_print_stat_array_obstack); |
359 | ||
360 | if (obstack_final_size > stat_array_obstack_initial_size) | |
361 | { | |
362 | void *free_to_ptr = | |
1ae1b8cc | 363 | (char *) obstack_next_free (&dont_print_stat_array_obstack) |
aff410f1 MS |
364 | - (obstack_final_size |
365 | - stat_array_obstack_initial_size); | |
f56dcb88 CM |
366 | |
367 | obstack_free (&dont_print_stat_array_obstack, | |
368 | free_to_ptr); | |
369 | } | |
ec31cde5 CM |
370 | last_set_recurse = -1; |
371 | } | |
c906108c SS |
372 | } |
373 | ||
2a998fc0 | 374 | if (options->prettyformat) |
c906108c SS |
375 | { |
376 | fprintf_filtered (stream, "\n"); | |
377 | print_spaces_filtered (2 * recurse, stream); | |
378 | } | |
c5aa993b | 379 | } /* if there are data fields */ |
c5aa993b | 380 | |
c906108c SS |
381 | fprintf_filtered (stream, "}"); |
382 | } | |
383 | ||
edf3d5f3 TT |
384 | /* Like cp_print_value_fields, but find the runtime type of the object |
385 | and pass it as the `real_type' argument to cp_print_value_fields. | |
386 | This function is a hack to work around the fact that | |
387 | common_val_print passes the embedded offset to val_print, but not | |
388 | the enclosing type. */ | |
389 | ||
390 | void | |
391 | cp_print_value_fields_rtti (struct type *type, | |
6b850546 | 392 | const gdb_byte *valaddr, LONGEST offset, |
edf3d5f3 TT |
393 | CORE_ADDR address, |
394 | struct ui_file *stream, int recurse, | |
e8b24d9f | 395 | struct value *val, |
edf3d5f3 | 396 | const struct value_print_options *options, |
c5504eaf MS |
397 | struct type **dont_print_vb, |
398 | int dont_print_statmem) | |
edf3d5f3 | 399 | { |
0e03807e TT |
400 | struct type *real_type = NULL; |
401 | ||
402 | /* We require all bits to be valid in order to attempt a | |
403 | conversion. */ | |
9a0dc9e3 PA |
404 | if (!value_bits_any_optimized_out (val, |
405 | TARGET_CHAR_BIT * offset, | |
406 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
0e03807e TT |
407 | { |
408 | struct value *value; | |
6b850546 DT |
409 | int full, using_enc; |
410 | LONGEST top; | |
0e03807e TT |
411 | |
412 | /* Ugh, we have to convert back to a value here. */ | |
413 | value = value_from_contents_and_address (type, valaddr + offset, | |
414 | address + offset); | |
9f1f738a | 415 | type = value_type (value); |
aff410f1 MS |
416 | /* We don't actually care about most of the result here -- just |
417 | the type. We already have the correct offset, due to how | |
418 | val_print was initially called. */ | |
0e03807e TT |
419 | real_type = value_rtti_type (value, &full, &top, &using_enc); |
420 | } | |
421 | ||
edf3d5f3 TT |
422 | if (!real_type) |
423 | real_type = type; | |
424 | ||
65408fa6 | 425 | cp_print_value_fields (type, real_type, offset, |
0e03807e | 426 | address, stream, recurse, val, options, |
edf3d5f3 TT |
427 | dont_print_vb, dont_print_statmem); |
428 | } | |
429 | ||
aff410f1 MS |
430 | /* Special val_print routine to avoid printing multiple copies of |
431 | virtual baseclasses. */ | |
c906108c SS |
432 | |
433 | static void | |
a2bd3dcd | 434 | cp_print_value (struct type *type, struct type *real_type, |
65408fa6 | 435 | LONGEST offset, |
aff410f1 | 436 | CORE_ADDR address, struct ui_file *stream, |
e8b24d9f | 437 | int recurse, struct value *val, |
79a45b7d TT |
438 | const struct value_print_options *options, |
439 | struct type **dont_print_vb) | |
c906108c | 440 | { |
c906108c | 441 | struct type **last_dont_print |
2c63a960 | 442 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 443 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 444 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
6b850546 | 445 | LONGEST thisoffset; |
b9d652ac | 446 | struct type *thistype; |
65408fa6 | 447 | const gdb_byte *valaddr = value_contents_for_printing (val); |
c906108c SS |
448 | |
449 | if (dont_print_vb == 0) | |
450 | { | |
aff410f1 MS |
451 | /* If we're at top level, carve out a completely fresh chunk of |
452 | the obstack and use that until this particular invocation | |
453 | returns. */ | |
c906108c SS |
454 | /* Bump up the high-water mark. Now alpha is omega. */ |
455 | obstack_finish (&dont_print_vb_obstack); | |
456 | } | |
457 | ||
458 | for (i = 0; i < n_baseclasses; i++) | |
459 | { | |
6b850546 | 460 | LONGEST boffset = 0; |
7556d4a4 | 461 | int skip = 0; |
c906108c | 462 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
0d5cff50 | 463 | const char *basename = TYPE_NAME (baseclass); |
e8b24d9f | 464 | struct value *base_val = NULL; |
c906108c SS |
465 | |
466 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
467 | { | |
468 | struct type **first_dont_print | |
2c63a960 | 469 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 470 | |
aff410f1 MS |
471 | int j = (struct type **) |
472 | obstack_next_free (&dont_print_vb_obstack) - first_dont_print; | |
c906108c SS |
473 | |
474 | while (--j >= 0) | |
475 | if (baseclass == first_dont_print[j]) | |
476 | goto flush_it; | |
477 | ||
478 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
479 | } | |
480 | ||
b9d652ac DJ |
481 | thisoffset = offset; |
482 | thistype = real_type; | |
086280be | 483 | |
a70b8144 | 484 | try |
c5aa993b | 485 | { |
8af8e3bc PA |
486 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
487 | } | |
230d2906 | 488 | catch (const gdb_exception_error &ex) |
7556d4a4 PA |
489 | { |
490 | if (ex.error == NOT_AVAILABLE_ERROR) | |
491 | skip = -1; | |
492 | else | |
493 | skip = 1; | |
494 | } | |
c906108c | 495 | |
7556d4a4 PA |
496 | if (skip == 0) |
497 | { | |
8af8e3bc | 498 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
c5aa993b | 499 | { |
8af8e3bc PA |
500 | /* The virtual base class pointer might have been |
501 | clobbered by the user program. Make sure that it | |
502 | still points to a valid memory location. */ | |
503 | ||
504 | if ((boffset + offset) < 0 | |
505 | || (boffset + offset) >= TYPE_LENGTH (real_type)) | |
506 | { | |
26fcd5d7 | 507 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); |
d5161074 | 508 | |
26fcd5d7 | 509 | if (target_read_memory (address + boffset, buf.data (), |
8af8e3bc PA |
510 | TYPE_LENGTH (baseclass)) != 0) |
511 | skip = 1; | |
512 | base_val = value_from_contents_and_address (baseclass, | |
26fcd5d7 | 513 | buf.data (), |
8af8e3bc | 514 | address + boffset); |
9f1f738a | 515 | baseclass = value_type (base_val); |
8af8e3bc PA |
516 | thisoffset = 0; |
517 | boffset = 0; | |
518 | thistype = baseclass; | |
8af8e3bc PA |
519 | } |
520 | else | |
521 | { | |
8af8e3bc PA |
522 | base_val = val; |
523 | } | |
c5aa993b JM |
524 | } |
525 | else | |
de4127a3 | 526 | { |
de4127a3 PA |
527 | base_val = val; |
528 | } | |
c906108c SS |
529 | } |
530 | ||
aff410f1 | 531 | /* Now do the printing. */ |
2a998fc0 | 532 | if (options->prettyformat) |
c906108c SS |
533 | { |
534 | fprintf_filtered (stream, "\n"); | |
535 | print_spaces_filtered (2 * recurse, stream); | |
536 | } | |
537 | fputs_filtered ("<", stream); | |
aff410f1 MS |
538 | /* Not sure what the best notation is in the case where there is |
539 | no baseclass name. */ | |
c906108c SS |
540 | fputs_filtered (basename ? basename : "", stream); |
541 | fputs_filtered ("> = ", stream); | |
542 | ||
8af8e3bc PA |
543 | if (skip < 0) |
544 | val_print_unavailable (stream); | |
545 | else if (skip > 0) | |
546 | val_print_invalid_address (stream); | |
c906108c | 547 | else |
a6bac58e TT |
548 | { |
549 | int result = 0; | |
550 | ||
2e62ab40 AB |
551 | if (options->max_depth > -1 |
552 | && recurse >= options->max_depth) | |
553 | { | |
554 | const struct language_defn *language = current_language; | |
555 | gdb_assert (language->la_struct_too_deep_ellipsis != NULL); | |
556 | fputs_filtered (language->la_struct_too_deep_ellipsis, stream); | |
557 | } | |
558 | else | |
559 | { | |
560 | /* Attempt to run an extension language pretty-printer on the | |
561 | baseclass if possible. */ | |
562 | if (!options->raw) | |
563 | result | |
564 | = apply_ext_lang_val_pretty_printer (baseclass, | |
565 | thisoffset + boffset, | |
566 | value_address (base_val), | |
567 | stream, recurse, | |
568 | base_val, options, | |
569 | current_language); | |
570 | ||
571 | if (!result) | |
572 | cp_print_value_fields (baseclass, thistype, | |
573 | thisoffset + boffset, | |
574 | value_address (base_val), | |
575 | stream, recurse, base_val, options, | |
576 | ((struct type **) | |
577 | obstack_base (&dont_print_vb_obstack)), | |
578 | 0); | |
579 | } | |
a6bac58e | 580 | } |
c906108c SS |
581 | fputs_filtered (", ", stream); |
582 | ||
583 | flush_it: | |
584 | ; | |
585 | } | |
586 | ||
587 | if (dont_print_vb == 0) | |
588 | { | |
589 | /* Free the space used to deal with the printing | |
c5aa993b | 590 | of this type from top level. */ |
c906108c SS |
591 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
592 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 593 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
594 | dont_print_vb_obstack = tmp_obstack; |
595 | } | |
596 | } | |
597 | ||
aff410f1 MS |
598 | /* Print value of a static member. To avoid infinite recursion when |
599 | printing a class that contains a static instance of the class, we | |
600 | keep the addresses of all printed static member classes in an | |
601 | obstack and refuse to print them more than once. | |
c906108c | 602 | |
79a45b7d | 603 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
604 | have the same meanings as in c_val_print. */ |
605 | ||
606 | static void | |
2c63a960 | 607 | cp_print_static_field (struct type *type, |
6943961c | 608 | struct value *val, |
2c63a960 | 609 | struct ui_file *stream, |
2c63a960 | 610 | int recurse, |
79a45b7d | 611 | const struct value_print_options *options) |
c906108c | 612 | { |
79a45b7d | 613 | struct value_print_options opts; |
686d4def PA |
614 | |
615 | if (value_entirely_optimized_out (val)) | |
616 | { | |
617 | val_print_optimized_out (val, stream); | |
618 | return; | |
619 | } | |
620 | ||
79f18731 WP |
621 | struct type *real_type = check_typedef (type); |
622 | if (TYPE_CODE (real_type) == TYPE_CODE_STRUCT) | |
c906108c SS |
623 | { |
624 | CORE_ADDR *first_dont_print; | |
42ae5230 | 625 | CORE_ADDR addr; |
c906108c SS |
626 | int i; |
627 | ||
628 | first_dont_print | |
c5aa993b | 629 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
630 | i = obstack_object_size (&dont_print_statmem_obstack) |
631 | / sizeof (CORE_ADDR); | |
c906108c SS |
632 | |
633 | while (--i >= 0) | |
634 | { | |
42ae5230 | 635 | if (value_address (val) == first_dont_print[i]) |
c906108c | 636 | { |
2c63a960 JB |
637 | fputs_filtered ("<same as static member of an already" |
638 | " seen type>", | |
c906108c SS |
639 | stream); |
640 | return; | |
641 | } | |
642 | } | |
643 | ||
42ae5230 TT |
644 | addr = value_address (val); |
645 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 646 | sizeof (CORE_ADDR)); |
edf3d5f3 | 647 | cp_print_value_fields (type, value_enclosing_type (val), |
42ae5230 | 648 | value_embedded_offset (val), addr, |
aff410f1 MS |
649 | stream, recurse, val, |
650 | options, NULL, 1); | |
c906108c SS |
651 | return; |
652 | } | |
79a45b7d | 653 | |
79f18731 | 654 | if (TYPE_CODE (real_type) == TYPE_CODE_ARRAY) |
ec31cde5 CM |
655 | { |
656 | struct type **first_dont_print; | |
657 | int i; | |
658 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
659 | ||
660 | first_dont_print | |
661 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
662 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
1e9beacb | 663 | / sizeof (struct type *); |
ec31cde5 CM |
664 | |
665 | while (--i >= 0) | |
666 | { | |
667 | if (target_type == first_dont_print[i]) | |
668 | { | |
669 | fputs_filtered ("<same as static member of an already" | |
670 | " seen type>", | |
671 | stream); | |
672 | return; | |
673 | } | |
674 | } | |
675 | ||
aff410f1 MS |
676 | obstack_grow (&dont_print_stat_array_obstack, |
677 | (char *) &target_type, | |
ec31cde5 CM |
678 | sizeof (struct type *)); |
679 | } | |
680 | ||
79a45b7d TT |
681 | opts = *options; |
682 | opts.deref_ref = 0; | |
e8b24d9f | 683 | val_print (type, |
aff410f1 MS |
684 | value_embedded_offset (val), |
685 | value_address (val), | |
686 | stream, recurse, val, | |
687 | &opts, current_language); | |
c906108c SS |
688 | } |
689 | ||
09e2d7c7 DE |
690 | /* Find the field in *SELF, or its non-virtual base classes, with |
691 | bit offset OFFSET. Set *SELF to the containing type and *FIELDNO | |
aff410f1 | 692 | to the containing field number. If OFFSET is not exactly at the |
09e2d7c7 | 693 | start of some field, set *SELF to NULL. */ |
0d5de010 | 694 | |
2c0b251b | 695 | static void |
09e2d7c7 | 696 | cp_find_class_member (struct type **self_p, int *fieldno, |
0d5de010 DJ |
697 | LONGEST offset) |
698 | { | |
09e2d7c7 | 699 | struct type *self; |
0d5de010 DJ |
700 | unsigned int i; |
701 | unsigned len; | |
702 | ||
09e2d7c7 DE |
703 | *self_p = check_typedef (*self_p); |
704 | self = *self_p; | |
705 | len = TYPE_NFIELDS (self); | |
0d5de010 | 706 | |
09e2d7c7 | 707 | for (i = TYPE_N_BASECLASSES (self); i < len; i++) |
0d5de010 | 708 | { |
09e2d7c7 | 709 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
0d5de010 DJ |
710 | |
711 | QUIT; | |
712 | if (offset == bitpos) | |
713 | { | |
714 | *fieldno = i; | |
715 | return; | |
716 | } | |
717 | } | |
718 | ||
09e2d7c7 | 719 | for (i = 0; i < TYPE_N_BASECLASSES (self); i++) |
0d5de010 | 720 | { |
09e2d7c7 DE |
721 | LONGEST bitpos = TYPE_FIELD_BITPOS (self, i); |
722 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (self, i)); | |
0d5de010 DJ |
723 | |
724 | if (offset >= bitpos && offset < bitpos + bitsize) | |
725 | { | |
09e2d7c7 DE |
726 | *self_p = TYPE_FIELD_TYPE (self, i); |
727 | cp_find_class_member (self_p, fieldno, offset - bitpos); | |
0d5de010 DJ |
728 | return; |
729 | } | |
730 | } | |
731 | ||
09e2d7c7 | 732 | *self_p = NULL; |
0d5de010 DJ |
733 | } |
734 | ||
c906108c | 735 | void |
ad4820ab | 736 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
a121b7c1 | 737 | struct ui_file *stream, const char *prefix) |
c906108c | 738 | { |
e17a4113 UW |
739 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
740 | ||
09e2d7c7 | 741 | /* VAL is a byte offset into the structure type SELF_TYPE. |
c906108c SS |
742 | Find the name of the field for that offset and |
743 | print it. */ | |
09e2d7c7 | 744 | struct type *self_type = TYPE_SELF_TYPE (type); |
e17a4113 | 745 | LONGEST val; |
9f8afa72 | 746 | int fieldno; |
c906108c | 747 | |
aff410f1 MS |
748 | val = extract_signed_integer (valaddr, |
749 | TYPE_LENGTH (type), | |
750 | byte_order); | |
e17a4113 | 751 | |
0d5de010 DJ |
752 | /* Pointers to data members are usually byte offsets into an object. |
753 | Because a data member can have offset zero, and a NULL pointer to | |
754 | member must be distinct from any valid non-NULL pointer to | |
755 | member, either the value is biased or the NULL value has a | |
756 | special representation; both are permitted by ISO C++. HP aCC | |
757 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
758 | and other compilers which use the Itanium ABI use -1 as the NULL | |
759 | value. GDB only supports that last form; to add support for | |
760 | another form, make this into a cp-abi hook. */ | |
c906108c | 761 | |
0d5de010 | 762 | if (val == -1) |
c906108c | 763 | { |
0d5de010 DJ |
764 | fprintf_filtered (stream, "NULL"); |
765 | return; | |
c906108c | 766 | } |
0d5de010 | 767 | |
09e2d7c7 | 768 | cp_find_class_member (&self_type, &fieldno, val << 3); |
0d5de010 | 769 | |
09e2d7c7 | 770 | if (self_type != NULL) |
c906108c | 771 | { |
0d5cff50 | 772 | const char *name; |
c5504eaf | 773 | |
306d9ac5 | 774 | fputs_filtered (prefix, stream); |
a737d952 | 775 | name = TYPE_NAME (self_type); |
c906108c | 776 | if (name) |
c5aa993b | 777 | fputs_filtered (name, stream); |
c906108c | 778 | else |
09e2d7c7 | 779 | c_type_print_base (self_type, stream, 0, 0, &type_print_raw_options); |
c906108c | 780 | fprintf_filtered (stream, "::"); |
09e2d7c7 | 781 | fputs_filtered (TYPE_FIELD_NAME (self_type, fieldno), stream); |
c906108c SS |
782 | } |
783 | else | |
0d5de010 | 784 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
785 | } |
786 | ||
787 | ||
c906108c | 788 | void |
fba45db2 | 789 | _initialize_cp_valprint (void) |
c906108c | 790 | { |
aff410f1 MS |
791 | obstack_begin (&dont_print_stat_array_obstack, |
792 | 32 * sizeof (struct type *)); | |
793 | obstack_begin (&dont_print_statmem_obstack, | |
794 | 32 * sizeof (CORE_ADDR)); | |
795 | obstack_begin (&dont_print_vb_obstack, | |
796 | 32 * sizeof (struct type *)); | |
c906108c | 797 | } |