Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Support for printing C++ values for GDB, the GNU debugger. |
a2bd3dcd | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
9b254dd1 DJ |
4 | 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008 |
5 | Free Software Foundation, Inc. | |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
04ea0df1 | 23 | #include "gdb_obstack.h" |
c906108c SS |
24 | #include "symtab.h" |
25 | #include "gdbtypes.h" | |
26 | #include "expression.h" | |
27 | #include "value.h" | |
28 | #include "command.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "demangle.h" | |
31 | #include "annotate.h" | |
32 | #include "gdb_string.h" | |
33 | #include "c-lang.h" | |
34 | #include "target.h" | |
b9d652ac | 35 | #include "cp-abi.h" |
973177d3 | 36 | #include "valprint.h" |
d3cbe7ef | 37 | #include "cp-support.h" |
cf309262 | 38 | #include "language.h" |
c906108c | 39 | |
920d2a44 AC |
40 | /* Controls printing of vtbl's */ |
41 | int vtblprint; | |
42 | static void | |
43 | show_vtblprint (struct ui_file *file, int from_tty, | |
44 | struct cmd_list_element *c, const char *value) | |
45 | { | |
46 | fprintf_filtered (file, _("\ | |
47 | Printing of C++ virtual function tables is %s.\n"), | |
48 | value); | |
49 | } | |
50 | ||
51 | /* Controls looking up an object's derived type using what we find in | |
52 | its vtables. */ | |
53 | int objectprint; | |
54 | static void | |
55 | show_objectprint (struct ui_file *file, int from_tty, | |
56 | struct cmd_list_element *c, | |
57 | const char *value) | |
58 | { | |
59 | fprintf_filtered (file, _("\ | |
60 | Printing of object's derived type based on vtable info is %s.\n"), | |
61 | value); | |
62 | } | |
63 | ||
c5aa993b | 64 | int static_field_print; /* Controls printing of static fields. */ |
920d2a44 AC |
65 | static void |
66 | show_static_field_print (struct ui_file *file, int from_tty, | |
67 | struct cmd_list_element *c, const char *value) | |
68 | { | |
69 | fprintf_filtered (file, _("Printing of C++ static members is %s.\n"), | |
70 | value); | |
71 | } | |
72 | ||
c906108c SS |
73 | |
74 | static struct obstack dont_print_vb_obstack; | |
75 | static struct obstack dont_print_statmem_obstack; | |
76 | ||
a14ed312 | 77 | extern void _initialize_cp_valprint (void); |
392a587b | 78 | |
6943961c | 79 | static void cp_print_static_field (struct type *, struct value *, |
d9fcf2fb JM |
80 | struct ui_file *, int, int, |
81 | enum val_prettyprint); | |
c906108c | 82 | |
fc1a4b47 | 83 | static void cp_print_value (struct type *, struct type *, const gdb_byte *, |
a2bd3dcd | 84 | int, CORE_ADDR, struct ui_file *, int, int, |
d9fcf2fb | 85 | enum val_prettyprint, struct type **); |
c906108c | 86 | |
c906108c | 87 | |
8343f86c | 88 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 89 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 90 | |
c906108c SS |
91 | /* Return truth value for assertion that TYPE is of the type |
92 | "pointer to virtual function". */ | |
93 | ||
94 | int | |
fba45db2 | 95 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c SS |
96 | { |
97 | char *typename = type_name_no_tag (type); | |
98 | ||
8343f86c | 99 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
100 | } |
101 | ||
102 | /* Return truth value for the assertion that TYPE is of the type | |
103 | "pointer to virtual function table". */ | |
104 | ||
105 | int | |
fba45db2 | 106 | cp_is_vtbl_member (struct type *type) |
c906108c | 107 | { |
0e5e3ea6 PS |
108 | /* With older versions of g++, the vtbl field pointed to an array |
109 | of structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
110 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
111 | { | |
112 | type = TYPE_TARGET_TYPE (type); | |
113 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
114 | { | |
115 | type = TYPE_TARGET_TYPE (type); | |
c5aa993b JM |
116 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
117 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
118 | { |
119 | /* Virtual functions tables are full of pointers | |
c5aa993b | 120 | to virtual functions. */ |
c906108c SS |
121 | return cp_is_vtbl_ptr_type (type); |
122 | } | |
123 | } | |
0e5e3ea6 PS |
124 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
125 | { | |
126 | return cp_is_vtbl_ptr_type (type); | |
127 | } | |
128 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
129 | { | |
130 | /* The type name of the thunk pointer is NULL when using dwarf2. | |
131 | We could test for a pointer to a function, but there is | |
132 | no type info for the virtual table either, so it wont help. */ | |
133 | return cp_is_vtbl_ptr_type (type); | |
134 | } | |
c906108c SS |
135 | } |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
140 | print out a structure's fields: cp_print_value_fields and cp_print_value. | |
c5aa993b | 141 | |
c906108c SS |
142 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the |
143 | same meanings as in cp_print_value and c_val_print. | |
144 | ||
145 | 2nd argument REAL_TYPE is used to carry over the type of the derived | |
146 | class across the recursion to base classes. | |
147 | ||
148 | DONT_PRINT is an array of baseclass types that we | |
149 | should not print, or zero if called from top level. */ | |
150 | ||
151 | void | |
a2bd3dcd | 152 | cp_print_value_fields (struct type *type, struct type *real_type, |
fc1a4b47 | 153 | const gdb_byte *valaddr, int offset, CORE_ADDR address, |
a2bd3dcd AC |
154 | struct ui_file *stream, int format, int recurse, |
155 | enum val_prettyprint pretty, | |
156 | struct type **dont_print_vb,int dont_print_statmem) | |
c906108c SS |
157 | { |
158 | int i, len, n_baseclasses; | |
c906108c SS |
159 | char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack); |
160 | int fields_seen = 0; | |
161 | ||
162 | CHECK_TYPEDEF (type); | |
163 | ||
164 | fprintf_filtered (stream, "{"); | |
165 | len = TYPE_NFIELDS (type); | |
166 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
167 | ||
168 | /* First, print out baseclasses such that we don't print | |
169 | duplicates of virtual baseclasses. */ | |
170 | ||
171 | if (n_baseclasses > 0) | |
172 | cp_print_value (type, real_type, valaddr, offset, address, stream, | |
c5aa993b | 173 | format, recurse + 1, pretty, dont_print_vb); |
c906108c SS |
174 | |
175 | /* Second, print out data fields */ | |
176 | ||
086280be UW |
177 | /* If there are no data fields, skip this part */ |
178 | if (len == n_baseclasses || !len) | |
c906108c SS |
179 | fprintf_filtered (stream, "<No data fields>"); |
180 | else | |
181 | { | |
c1b6e682 DJ |
182 | struct obstack tmp_obstack = dont_print_statmem_obstack; |
183 | ||
c906108c SS |
184 | if (dont_print_statmem == 0) |
185 | { | |
186 | /* If we're at top level, carve out a completely fresh | |
187 | chunk of the obstack and use that until this particular | |
188 | invocation returns. */ | |
c906108c SS |
189 | obstack_finish (&dont_print_statmem_obstack); |
190 | } | |
191 | ||
192 | for (i = n_baseclasses; i < len; i++) | |
193 | { | |
194 | /* If requested, skip printing of static fields. */ | |
195 | if (!static_field_print && TYPE_FIELD_STATIC (type, i)) | |
196 | continue; | |
197 | ||
c906108c SS |
198 | if (fields_seen) |
199 | fprintf_filtered (stream, ", "); | |
200 | else if (n_baseclasses > 0) | |
201 | { | |
202 | if (pretty) | |
203 | { | |
204 | fprintf_filtered (stream, "\n"); | |
205 | print_spaces_filtered (2 + 2 * recurse, stream); | |
206 | fputs_filtered ("members of ", stream); | |
207 | fputs_filtered (type_name_no_tag (type), stream); | |
208 | fputs_filtered (": ", stream); | |
209 | } | |
210 | } | |
211 | fields_seen = 1; | |
212 | ||
213 | if (pretty) | |
214 | { | |
215 | fprintf_filtered (stream, "\n"); | |
216 | print_spaces_filtered (2 + 2 * recurse, stream); | |
217 | } | |
c5aa993b | 218 | else |
c906108c SS |
219 | { |
220 | wrap_here (n_spaces (2 + 2 * recurse)); | |
221 | } | |
222 | if (inspect_it) | |
223 | { | |
224 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) | |
225 | fputs_filtered ("\"( ptr \"", stream); | |
226 | else | |
227 | fputs_filtered ("\"( nodef \"", stream); | |
228 | if (TYPE_FIELD_STATIC (type, i)) | |
229 | fputs_filtered ("static ", stream); | |
230 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 231 | current_language->la_language, |
c906108c SS |
232 | DMGL_PARAMS | DMGL_ANSI); |
233 | fputs_filtered ("\" \"", stream); | |
234 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 235 | current_language->la_language, |
c906108c SS |
236 | DMGL_PARAMS | DMGL_ANSI); |
237 | fputs_filtered ("\") \"", stream); | |
238 | } | |
239 | else | |
240 | { | |
241 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
242 | ||
243 | if (TYPE_FIELD_STATIC (type, i)) | |
244 | fputs_filtered ("static ", stream); | |
245 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 246 | current_language->la_language, |
c906108c SS |
247 | DMGL_PARAMS | DMGL_ANSI); |
248 | annotate_field_name_end (); | |
249 | /* do not print leading '=' in case of anonymous unions */ | |
250 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
251 | fputs_filtered (" = ", stream); | |
252 | annotate_field_value (); | |
253 | } | |
254 | ||
255 | if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i)) | |
256 | { | |
6943961c | 257 | struct value *v; |
c906108c SS |
258 | |
259 | /* Bitfields require special handling, especially due to byte | |
c5aa993b | 260 | order problems. */ |
c906108c SS |
261 | if (TYPE_FIELD_IGNORE (type, i)) |
262 | { | |
c5aa993b | 263 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c SS |
264 | } |
265 | else | |
266 | { | |
2c63a960 JB |
267 | v = value_from_longest |
268 | (TYPE_FIELD_TYPE (type, i), | |
269 | unpack_field_as_long (type, valaddr + offset, i)); | |
c906108c | 270 | |
806048c6 | 271 | common_val_print (v, stream, format, 0, recurse + 1, pretty); |
c906108c SS |
272 | } |
273 | } | |
274 | else | |
275 | { | |
276 | if (TYPE_FIELD_IGNORE (type, i)) | |
277 | { | |
c5aa993b | 278 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c SS |
279 | } |
280 | else if (TYPE_FIELD_STATIC (type, i)) | |
281 | { | |
6943961c | 282 | struct value *v = value_static_field (type, i); |
c906108c SS |
283 | if (v == NULL) |
284 | fputs_filtered ("<optimized out>", stream); | |
285 | else | |
286 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), v, | |
287 | stream, format, recurse + 1, | |
288 | pretty); | |
289 | } | |
290 | else | |
291 | { | |
c5aa993b | 292 | val_print (TYPE_FIELD_TYPE (type, i), |
2c63a960 | 293 | valaddr, offset + TYPE_FIELD_BITPOS (type, i) / 8, |
c5aa993b JM |
294 | address + TYPE_FIELD_BITPOS (type, i) / 8, |
295 | stream, format, 0, recurse + 1, pretty); | |
c906108c SS |
296 | } |
297 | } | |
298 | annotate_field_end (); | |
299 | } | |
300 | ||
301 | if (dont_print_statmem == 0) | |
302 | { | |
303 | /* Free the space used to deal with the printing | |
304 | of the members from top level. */ | |
305 | obstack_free (&dont_print_statmem_obstack, last_dont_print); | |
306 | dont_print_statmem_obstack = tmp_obstack; | |
307 | } | |
308 | ||
309 | if (pretty) | |
310 | { | |
311 | fprintf_filtered (stream, "\n"); | |
312 | print_spaces_filtered (2 * recurse, stream); | |
313 | } | |
c5aa993b | 314 | } /* if there are data fields */ |
c5aa993b | 315 | |
c906108c SS |
316 | fprintf_filtered (stream, "}"); |
317 | } | |
318 | ||
319 | /* Special val_print routine to avoid printing multiple copies of virtual | |
320 | baseclasses. */ | |
321 | ||
322 | static void | |
a2bd3dcd | 323 | cp_print_value (struct type *type, struct type *real_type, |
fc1a4b47 | 324 | const gdb_byte *valaddr, int offset, CORE_ADDR address, |
a2bd3dcd AC |
325 | struct ui_file *stream, int format, int recurse, |
326 | enum val_prettyprint pretty, struct type **dont_print_vb) | |
c906108c | 327 | { |
c906108c | 328 | struct type **last_dont_print |
2c63a960 | 329 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 330 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 331 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
332 | int thisoffset; |
333 | struct type *thistype; | |
c906108c SS |
334 | |
335 | if (dont_print_vb == 0) | |
336 | { | |
337 | /* If we're at top level, carve out a completely fresh | |
c5aa993b JM |
338 | chunk of the obstack and use that until this particular |
339 | invocation returns. */ | |
c906108c SS |
340 | /* Bump up the high-water mark. Now alpha is omega. */ |
341 | obstack_finish (&dont_print_vb_obstack); | |
342 | } | |
343 | ||
344 | for (i = 0; i < n_baseclasses; i++) | |
345 | { | |
346 | int boffset; | |
347 | int skip; | |
348 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
349 | char *basename = TYPE_NAME (baseclass); | |
fc1a4b47 | 350 | const gdb_byte *base_valaddr; |
c906108c SS |
351 | |
352 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
353 | { | |
354 | struct type **first_dont_print | |
2c63a960 | 355 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 356 | |
c5aa993b | 357 | int j = (struct type **) obstack_next_free (&dont_print_vb_obstack) |
2c63a960 | 358 | - first_dont_print; |
c906108c SS |
359 | |
360 | while (--j >= 0) | |
361 | if (baseclass == first_dont_print[j]) | |
362 | goto flush_it; | |
363 | ||
364 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
365 | } | |
366 | ||
b9d652ac DJ |
367 | thisoffset = offset; |
368 | thistype = real_type; | |
086280be UW |
369 | |
370 | boffset = baseclass_offset (type, i, valaddr + offset, address); | |
371 | skip = ((boffset == -1) || (boffset + offset) < 0) ? 1 : -1; | |
372 | ||
373 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
c5aa993b | 374 | { |
086280be UW |
375 | /* The virtual base class pointer might have been |
376 | clobbered by the user program. Make sure that it | |
377 | still points to a valid memory location. */ | |
c906108c | 378 | |
086280be UW |
379 | if (boffset != -1 |
380 | && ((boffset + offset) < 0 | |
381 | || (boffset + offset) >= TYPE_LENGTH (type))) | |
c5aa993b | 382 | { |
086280be UW |
383 | /* FIXME (alloca): unsafe if baseclass is really really large. */ |
384 | gdb_byte *buf = alloca (TYPE_LENGTH (baseclass)); | |
385 | base_valaddr = buf; | |
386 | if (target_read_memory (address + boffset, buf, | |
387 | TYPE_LENGTH (baseclass)) != 0) | |
388 | skip = 1; | |
389 | address = address + boffset; | |
390 | thisoffset = 0; | |
391 | boffset = 0; | |
392 | thistype = baseclass; | |
c5aa993b JM |
393 | } |
394 | else | |
395 | base_valaddr = valaddr; | |
c906108c | 396 | } |
086280be UW |
397 | else |
398 | base_valaddr = valaddr; | |
c906108c SS |
399 | |
400 | /* now do the printing */ | |
401 | if (pretty) | |
402 | { | |
403 | fprintf_filtered (stream, "\n"); | |
404 | print_spaces_filtered (2 * recurse, stream); | |
405 | } | |
406 | fputs_filtered ("<", stream); | |
407 | /* Not sure what the best notation is in the case where there is no | |
c5aa993b | 408 | baseclass name. */ |
c906108c SS |
409 | fputs_filtered (basename ? basename : "", stream); |
410 | fputs_filtered ("> = ", stream); | |
411 | ||
412 | ||
413 | if (skip >= 1) | |
414 | fprintf_filtered (stream, "<invalid address>"); | |
415 | else | |
b9d652ac | 416 | cp_print_value_fields (baseclass, thistype, base_valaddr, |
9e14d721 DJ |
417 | thisoffset + boffset, address + boffset, |
418 | stream, format, | |
2c63a960 JB |
419 | recurse, pretty, |
420 | ((struct type **) | |
421 | obstack_base (&dont_print_vb_obstack)), | |
c906108c SS |
422 | 0); |
423 | fputs_filtered (", ", stream); | |
424 | ||
425 | flush_it: | |
426 | ; | |
427 | } | |
428 | ||
429 | if (dont_print_vb == 0) | |
430 | { | |
431 | /* Free the space used to deal with the printing | |
c5aa993b | 432 | of this type from top level. */ |
c906108c SS |
433 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
434 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 435 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
436 | dont_print_vb_obstack = tmp_obstack; |
437 | } | |
438 | } | |
439 | ||
440 | /* Print value of a static member. | |
441 | To avoid infinite recursion when printing a class that contains | |
442 | a static instance of the class, we keep the addresses of all printed | |
443 | static member classes in an obstack and refuse to print them more | |
444 | than once. | |
445 | ||
446 | VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY | |
447 | have the same meanings as in c_val_print. */ | |
448 | ||
449 | static void | |
2c63a960 | 450 | cp_print_static_field (struct type *type, |
6943961c | 451 | struct value *val, |
2c63a960 JB |
452 | struct ui_file *stream, |
453 | int format, | |
454 | int recurse, | |
455 | enum val_prettyprint pretty) | |
c906108c SS |
456 | { |
457 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
458 | { | |
459 | CORE_ADDR *first_dont_print; | |
460 | int i; | |
461 | ||
462 | first_dont_print | |
c5aa993b JM |
463 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
464 | i = (CORE_ADDR *) obstack_next_free (&dont_print_statmem_obstack) | |
c906108c SS |
465 | - first_dont_print; |
466 | ||
467 | while (--i >= 0) | |
468 | { | |
469 | if (VALUE_ADDRESS (val) == first_dont_print[i]) | |
470 | { | |
2c63a960 JB |
471 | fputs_filtered ("<same as static member of an already" |
472 | " seen type>", | |
c906108c SS |
473 | stream); |
474 | return; | |
475 | } | |
476 | } | |
477 | ||
478 | obstack_grow (&dont_print_statmem_obstack, (char *) &VALUE_ADDRESS (val), | |
479 | sizeof (CORE_ADDR)); | |
480 | ||
481 | CHECK_TYPEDEF (type); | |
46615f07 | 482 | cp_print_value_fields (type, type, value_contents_all (val), |
13c3b5f5 | 483 | value_embedded_offset (val), VALUE_ADDRESS (val), |
c906108c SS |
484 | stream, format, recurse, pretty, NULL, 1); |
485 | return; | |
486 | } | |
46615f07 | 487 | val_print (type, value_contents_all (val), |
13c3b5f5 | 488 | value_embedded_offset (val), VALUE_ADDRESS (val), |
c906108c SS |
489 | stream, format, 0, recurse, pretty); |
490 | } | |
491 | ||
0d5de010 DJ |
492 | |
493 | /* Find the field in *DOMAIN, or its non-virtual base classes, with bit offset | |
494 | OFFSET. Set *DOMAIN to the containing type and *FIELDNO to the containing | |
495 | field number. If OFFSET is not exactly at the start of some field, set | |
496 | *DOMAIN to NULL. */ | |
497 | ||
498 | void | |
499 | cp_find_class_member (struct type **domain_p, int *fieldno, | |
500 | LONGEST offset) | |
501 | { | |
502 | struct type *domain; | |
503 | unsigned int i; | |
504 | unsigned len; | |
505 | ||
506 | *domain_p = check_typedef (*domain_p); | |
507 | domain = *domain_p; | |
508 | len = TYPE_NFIELDS (domain); | |
509 | ||
510 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
511 | { | |
512 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
513 | ||
514 | QUIT; | |
515 | if (offset == bitpos) | |
516 | { | |
517 | *fieldno = i; | |
518 | return; | |
519 | } | |
520 | } | |
521 | ||
522 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
523 | { | |
524 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
525 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
526 | ||
527 | if (offset >= bitpos && offset < bitpos + bitsize) | |
528 | { | |
529 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
530 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
531 | return; | |
532 | } | |
533 | } | |
534 | ||
535 | *domain_p = NULL; | |
536 | } | |
537 | ||
c906108c | 538 | void |
fc1a4b47 | 539 | cp_print_class_member (const gdb_byte *valaddr, struct type *domain, |
fba45db2 | 540 | struct ui_file *stream, char *prefix) |
c906108c | 541 | { |
c906108c SS |
542 | /* VAL is a byte offset into the structure type DOMAIN. |
543 | Find the name of the field for that offset and | |
544 | print it. */ | |
0d5de010 | 545 | unsigned int fieldno; |
c906108c | 546 | |
0d5de010 | 547 | LONGEST val = unpack_long (builtin_type_long, valaddr); |
c906108c | 548 | |
0d5de010 DJ |
549 | /* Pointers to data members are usually byte offsets into an object. |
550 | Because a data member can have offset zero, and a NULL pointer to | |
551 | member must be distinct from any valid non-NULL pointer to | |
552 | member, either the value is biased or the NULL value has a | |
553 | special representation; both are permitted by ISO C++. HP aCC | |
554 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
555 | and other compilers which use the Itanium ABI use -1 as the NULL | |
556 | value. GDB only supports that last form; to add support for | |
557 | another form, make this into a cp-abi hook. */ | |
c906108c | 558 | |
0d5de010 | 559 | if (val == -1) |
c906108c | 560 | { |
0d5de010 DJ |
561 | fprintf_filtered (stream, "NULL"); |
562 | return; | |
c906108c | 563 | } |
0d5de010 DJ |
564 | |
565 | cp_find_class_member (&domain, &fieldno, val << 3); | |
566 | ||
567 | if (domain != NULL) | |
c906108c SS |
568 | { |
569 | char *name; | |
306d9ac5 | 570 | fputs_filtered (prefix, stream); |
c906108c SS |
571 | name = type_name_no_tag (domain); |
572 | if (name) | |
c5aa993b | 573 | fputs_filtered (name, stream); |
c906108c SS |
574 | else |
575 | c_type_print_base (domain, stream, 0, 0); | |
576 | fprintf_filtered (stream, "::"); | |
0d5de010 | 577 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
578 | } |
579 | else | |
0d5de010 | 580 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
581 | } |
582 | ||
583 | ||
c906108c | 584 | void |
fba45db2 | 585 | _initialize_cp_valprint (void) |
c906108c | 586 | { |
5bf193a2 AC |
587 | add_setshow_boolean_cmd ("static-members", class_support, |
588 | &static_field_print, _("\ | |
589 | Set printing of C++ static members."), _("\ | |
590 | Show printing of C++ static members."), NULL, | |
591 | NULL, | |
920d2a44 | 592 | show_static_field_print, |
5bf193a2 | 593 | &setprintlist, &showprintlist); |
c906108c SS |
594 | /* Turn on printing of static fields. */ |
595 | static_field_print = 1; | |
596 | ||
5bf193a2 AC |
597 | add_setshow_boolean_cmd ("vtbl", class_support, &vtblprint, _("\ |
598 | Set printing of C++ virtual function tables."), _("\ | |
599 | Show printing of C++ virtual function tables."), NULL, | |
600 | NULL, | |
920d2a44 | 601 | show_vtblprint, |
5bf193a2 AC |
602 | &setprintlist, &showprintlist); |
603 | ||
604 | add_setshow_boolean_cmd ("object", class_support, &objectprint, _("\ | |
605 | Set printing of object's derived type based on vtable info."), _("\ | |
606 | Show printing of object's derived type based on vtable info."), NULL, | |
607 | NULL, | |
920d2a44 | 608 | show_objectprint, |
5bf193a2 | 609 | &setprintlist, &showprintlist); |
c906108c SS |
610 | |
611 | /* Give people the defaults which they are used to. */ | |
612 | objectprint = 0; | |
613 | vtblprint = 0; | |
614 | obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *)); | |
615 | obstack_specify_allocation (&dont_print_statmem_obstack, | |
616 | 32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR), | |
b8c9b27d | 617 | xmalloc, xfree); |
c906108c | 618 | } |