Commit | Line | Data |
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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, |
4c38e0a4 | 4 | 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010 |
9b254dd1 | 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" |
a6bac58e | 39 | #include "python/python.h" |
c906108c | 40 | |
920d2a44 | 41 | /* Controls printing of vtbl's */ |
920d2a44 AC |
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. */ | |
920d2a44 AC |
53 | static void |
54 | show_objectprint (struct ui_file *file, int from_tty, | |
55 | struct cmd_list_element *c, | |
56 | const char *value) | |
57 | { | |
58 | fprintf_filtered (file, _("\ | |
59 | Printing of object's derived type based on vtable info is %s.\n"), | |
60 | value); | |
61 | } | |
62 | ||
920d2a44 AC |
63 | static void |
64 | show_static_field_print (struct ui_file *file, int from_tty, | |
65 | struct cmd_list_element *c, const char *value) | |
66 | { | |
67 | fprintf_filtered (file, _("Printing of C++ static members is %s.\n"), | |
68 | value); | |
69 | } | |
70 | ||
c906108c SS |
71 | |
72 | static struct obstack dont_print_vb_obstack; | |
73 | static struct obstack dont_print_statmem_obstack; | |
ec31cde5 | 74 | static struct obstack dont_print_stat_array_obstack; |
c906108c | 75 | |
a14ed312 | 76 | extern void _initialize_cp_valprint (void); |
392a587b | 77 | |
6943961c | 78 | static void cp_print_static_field (struct type *, struct value *, |
79a45b7d TT |
79 | struct ui_file *, int, |
80 | const struct value_print_options *); | |
c906108c | 81 | |
fc1a4b47 | 82 | static void cp_print_value (struct type *, struct type *, const gdb_byte *, |
79a45b7d TT |
83 | int, CORE_ADDR, struct ui_file *, int, |
84 | const struct value_print_options *, struct type **); | |
c906108c | 85 | |
c906108c | 86 | |
8343f86c | 87 | /* GCC versions after 2.4.5 use this. */ |
2c63a960 | 88 | const char vtbl_ptr_name[] = "__vtbl_ptr_type"; |
c906108c | 89 | |
c906108c SS |
90 | /* Return truth value for assertion that TYPE is of the type |
91 | "pointer to virtual function". */ | |
92 | ||
93 | int | |
fba45db2 | 94 | cp_is_vtbl_ptr_type (struct type *type) |
c906108c SS |
95 | { |
96 | char *typename = type_name_no_tag (type); | |
97 | ||
8343f86c | 98 | return (typename != NULL && !strcmp (typename, vtbl_ptr_name)); |
c906108c SS |
99 | } |
100 | ||
101 | /* Return truth value for the assertion that TYPE is of the type | |
102 | "pointer to virtual function table". */ | |
103 | ||
104 | int | |
fba45db2 | 105 | cp_is_vtbl_member (struct type *type) |
c906108c | 106 | { |
0e5e3ea6 PS |
107 | /* With older versions of g++, the vtbl field pointed to an array |
108 | of structures. Nowadays it points directly to the structure. */ | |
c906108c SS |
109 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
110 | { | |
111 | type = TYPE_TARGET_TYPE (type); | |
112 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
113 | { | |
114 | type = TYPE_TARGET_TYPE (type); | |
c5aa993b JM |
115 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
116 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
c906108c SS |
117 | { |
118 | /* Virtual functions tables are full of pointers | |
c5aa993b | 119 | to virtual functions. */ |
c906108c SS |
120 | return cp_is_vtbl_ptr_type (type); |
121 | } | |
122 | } | |
0e5e3ea6 PS |
123 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */ |
124 | { | |
125 | return cp_is_vtbl_ptr_type (type); | |
126 | } | |
127 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ | |
128 | { | |
129 | /* The type name of the thunk pointer is NULL when using dwarf2. | |
130 | We could test for a pointer to a function, but there is | |
131 | no type info for the virtual table either, so it wont help. */ | |
132 | return cp_is_vtbl_ptr_type (type); | |
133 | } | |
c906108c SS |
134 | } |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* Mutually recursive subroutines of cp_print_value and c_val_print to | |
139 | print out a structure's fields: cp_print_value_fields and cp_print_value. | |
c5aa993b | 140 | |
79a45b7d | 141 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the |
c906108c SS |
142 | same meanings as in cp_print_value and c_val_print. |
143 | ||
144 | 2nd argument REAL_TYPE is used to carry over the type of the derived | |
145 | class across the recursion to base classes. | |
146 | ||
147 | DONT_PRINT is an array of baseclass types that we | |
148 | should not print, or zero if called from top level. */ | |
149 | ||
150 | void | |
a2bd3dcd | 151 | cp_print_value_fields (struct type *type, struct type *real_type, |
fc1a4b47 | 152 | const gdb_byte *valaddr, int offset, CORE_ADDR address, |
79a45b7d TT |
153 | struct ui_file *stream, int recurse, |
154 | const struct value_print_options *options, | |
155 | struct type **dont_print_vb, int dont_print_statmem) | |
c906108c SS |
156 | { |
157 | int i, len, n_baseclasses; | |
c906108c | 158 | int fields_seen = 0; |
ec31cde5 | 159 | static int last_set_recurse = -1; |
c906108c SS |
160 | |
161 | CHECK_TYPEDEF (type); | |
99903ae3 | 162 | |
ec31cde5 CM |
163 | if (recurse == 0) |
164 | { | |
165 | if (obstack_object_size (&dont_print_statmem_obstack) > 0) | |
166 | obstack_free (&dont_print_statmem_obstack, NULL); | |
167 | if (obstack_object_size (&dont_print_stat_array_obstack) > 0) | |
168 | obstack_free (&dont_print_stat_array_obstack, NULL); | |
169 | } | |
c906108c SS |
170 | |
171 | fprintf_filtered (stream, "{"); | |
172 | len = TYPE_NFIELDS (type); | |
173 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
174 | ||
175 | /* First, print out baseclasses such that we don't print | |
176 | duplicates of virtual baseclasses. */ | |
177 | ||
178 | if (n_baseclasses > 0) | |
179 | cp_print_value (type, real_type, valaddr, offset, address, stream, | |
79a45b7d | 180 | recurse + 1, options, dont_print_vb); |
c906108c SS |
181 | |
182 | /* Second, print out data fields */ | |
183 | ||
086280be UW |
184 | /* If there are no data fields, skip this part */ |
185 | if (len == n_baseclasses || !len) | |
c906108c SS |
186 | fprintf_filtered (stream, "<No data fields>"); |
187 | else | |
188 | { | |
f56dcb88 CM |
189 | int statmem_obstack_initial_size = 0; |
190 | int stat_array_obstack_initial_size = 0; | |
99903ae3 | 191 | |
c906108c SS |
192 | if (dont_print_statmem == 0) |
193 | { | |
f56dcb88 | 194 | statmem_obstack_initial_size = |
0b66f317 | 195 | obstack_object_size (&dont_print_statmem_obstack); |
ec31cde5 CM |
196 | |
197 | if (last_set_recurse != recurse) | |
198 | { | |
f56dcb88 CM |
199 | stat_array_obstack_initial_size = |
200 | obstack_object_size (&dont_print_stat_array_obstack); | |
ec31cde5 CM |
201 | last_set_recurse = recurse; |
202 | } | |
c906108c SS |
203 | } |
204 | ||
205 | for (i = n_baseclasses; i < len; i++) | |
206 | { | |
207 | /* If requested, skip printing of static fields. */ | |
79a45b7d | 208 | if (!options->static_field_print |
d6a843b5 | 209 | && field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
210 | continue; |
211 | ||
c906108c SS |
212 | if (fields_seen) |
213 | fprintf_filtered (stream, ", "); | |
214 | else if (n_baseclasses > 0) | |
215 | { | |
79a45b7d | 216 | if (options->pretty) |
c906108c SS |
217 | { |
218 | fprintf_filtered (stream, "\n"); | |
219 | print_spaces_filtered (2 + 2 * recurse, stream); | |
220 | fputs_filtered ("members of ", stream); | |
221 | fputs_filtered (type_name_no_tag (type), stream); | |
222 | fputs_filtered (": ", stream); | |
223 | } | |
224 | } | |
225 | fields_seen = 1; | |
226 | ||
79a45b7d | 227 | if (options->pretty) |
c906108c SS |
228 | { |
229 | fprintf_filtered (stream, "\n"); | |
230 | print_spaces_filtered (2 + 2 * recurse, stream); | |
231 | } | |
c5aa993b | 232 | else |
c906108c SS |
233 | { |
234 | wrap_here (n_spaces (2 + 2 * recurse)); | |
235 | } | |
79a45b7d | 236 | if (options->inspect_it) |
c906108c SS |
237 | { |
238 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) | |
239 | fputs_filtered ("\"( ptr \"", stream); | |
240 | else | |
241 | fputs_filtered ("\"( nodef \"", stream); | |
d6a843b5 | 242 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
243 | fputs_filtered ("static ", stream); |
244 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 245 | current_language->la_language, |
c906108c SS |
246 | DMGL_PARAMS | DMGL_ANSI); |
247 | fputs_filtered ("\" \"", stream); | |
248 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 249 | current_language->la_language, |
c906108c SS |
250 | DMGL_PARAMS | DMGL_ANSI); |
251 | fputs_filtered ("\") \"", stream); | |
252 | } | |
253 | else | |
254 | { | |
255 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
256 | ||
d6a843b5 | 257 | if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c SS |
258 | fputs_filtered ("static ", stream); |
259 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), | |
cf309262 | 260 | current_language->la_language, |
c906108c SS |
261 | DMGL_PARAMS | DMGL_ANSI); |
262 | annotate_field_name_end (); | |
263 | /* do not print leading '=' in case of anonymous unions */ | |
264 | if (strcmp (TYPE_FIELD_NAME (type, i), "")) | |
265 | fputs_filtered (" = ", stream); | |
266 | annotate_field_value (); | |
267 | } | |
268 | ||
d6a843b5 JK |
269 | if (!field_is_static (&TYPE_FIELD (type, i)) |
270 | && TYPE_FIELD_PACKED (type, i)) | |
c906108c | 271 | { |
6943961c | 272 | struct value *v; |
c906108c SS |
273 | |
274 | /* Bitfields require special handling, especially due to byte | |
c5aa993b | 275 | order problems. */ |
c906108c SS |
276 | if (TYPE_FIELD_IGNORE (type, i)) |
277 | { | |
c5aa993b | 278 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c SS |
279 | } |
280 | else | |
281 | { | |
79a45b7d TT |
282 | struct value_print_options opts = *options; |
283 | opts.deref_ref = 0; | |
2c63a960 JB |
284 | v = value_from_longest |
285 | (TYPE_FIELD_TYPE (type, i), | |
286 | unpack_field_as_long (type, valaddr + offset, i)); | |
c906108c | 287 | |
79a45b7d | 288 | common_val_print (v, stream, recurse + 1, &opts, |
d8ca156b | 289 | current_language); |
c906108c SS |
290 | } |
291 | } | |
292 | else | |
293 | { | |
294 | if (TYPE_FIELD_IGNORE (type, i)) | |
295 | { | |
c5aa993b | 296 | fputs_filtered ("<optimized out or zero length>", stream); |
c906108c | 297 | } |
d6a843b5 | 298 | else if (field_is_static (&TYPE_FIELD (type, i))) |
c906108c | 299 | { |
6943961c | 300 | struct value *v = value_static_field (type, i); |
c906108c SS |
301 | if (v == NULL) |
302 | fputs_filtered ("<optimized out>", stream); | |
303 | else | |
304 | cp_print_static_field (TYPE_FIELD_TYPE (type, i), v, | |
79a45b7d | 305 | stream, recurse + 1, options); |
c906108c SS |
306 | } |
307 | else | |
308 | { | |
79a45b7d TT |
309 | struct value_print_options opts = *options; |
310 | opts.deref_ref = 0; | |
c5aa993b | 311 | val_print (TYPE_FIELD_TYPE (type, i), |
2c63a960 | 312 | valaddr, offset + TYPE_FIELD_BITPOS (type, i) / 8, |
edf3d5f3 | 313 | address, |
79a45b7d | 314 | stream, recurse + 1, &opts, |
d8ca156b | 315 | current_language); |
c906108c SS |
316 | } |
317 | } | |
318 | annotate_field_end (); | |
319 | } | |
320 | ||
321 | if (dont_print_statmem == 0) | |
322 | { | |
0b66f317 CM |
323 | int obstack_final_size = |
324 | obstack_object_size (&dont_print_statmem_obstack); | |
325 | ||
f56dcb88 | 326 | if (obstack_final_size > statmem_obstack_initial_size) { |
0b66f317 CM |
327 | /* In effect, a pop of the printed-statics stack. */ |
328 | ||
329 | void *free_to_ptr = | |
330 | obstack_next_free (&dont_print_statmem_obstack) - | |
f56dcb88 | 331 | (obstack_final_size - statmem_obstack_initial_size); |
0b66f317 CM |
332 | |
333 | obstack_free (&dont_print_statmem_obstack, | |
334 | free_to_ptr); | |
335 | } | |
ec31cde5 CM |
336 | |
337 | if (last_set_recurse != recurse) | |
338 | { | |
f56dcb88 CM |
339 | int obstack_final_size = |
340 | obstack_object_size (&dont_print_stat_array_obstack); | |
341 | ||
342 | if (obstack_final_size > stat_array_obstack_initial_size) | |
343 | { | |
344 | void *free_to_ptr = | |
345 | obstack_next_free (&dont_print_stat_array_obstack) - | |
346 | (obstack_final_size - stat_array_obstack_initial_size); | |
347 | ||
348 | obstack_free (&dont_print_stat_array_obstack, | |
349 | free_to_ptr); | |
350 | } | |
ec31cde5 CM |
351 | last_set_recurse = -1; |
352 | } | |
c906108c SS |
353 | } |
354 | ||
79a45b7d | 355 | if (options->pretty) |
c906108c SS |
356 | { |
357 | fprintf_filtered (stream, "\n"); | |
358 | print_spaces_filtered (2 * recurse, stream); | |
359 | } | |
c5aa993b | 360 | } /* if there are data fields */ |
c5aa993b | 361 | |
c906108c SS |
362 | fprintf_filtered (stream, "}"); |
363 | } | |
364 | ||
edf3d5f3 TT |
365 | /* Like cp_print_value_fields, but find the runtime type of the object |
366 | and pass it as the `real_type' argument to cp_print_value_fields. | |
367 | This function is a hack to work around the fact that | |
368 | common_val_print passes the embedded offset to val_print, but not | |
369 | the enclosing type. */ | |
370 | ||
371 | void | |
372 | cp_print_value_fields_rtti (struct type *type, | |
373 | const gdb_byte *valaddr, int offset, | |
374 | CORE_ADDR address, | |
375 | struct ui_file *stream, int recurse, | |
376 | const struct value_print_options *options, | |
377 | struct type **dont_print_vb, int dont_print_statmem) | |
378 | { | |
379 | struct value *value; | |
380 | int full, top, using_enc; | |
381 | struct type *real_type; | |
382 | ||
383 | /* Ugh, we have to convert back to a value here. */ | |
384 | value = value_from_contents_and_address (type, valaddr + offset, | |
385 | address + offset); | |
386 | /* We don't actually care about most of the result here -- just the | |
387 | type. We already have the correct offset, due to how val_print | |
388 | was initially called. */ | |
389 | real_type = value_rtti_type (value, &full, &top, &using_enc); | |
390 | if (!real_type) | |
391 | real_type = type; | |
392 | ||
393 | cp_print_value_fields (type, real_type, valaddr, offset, | |
394 | address, stream, recurse, options, | |
395 | dont_print_vb, dont_print_statmem); | |
396 | } | |
397 | ||
c906108c SS |
398 | /* Special val_print routine to avoid printing multiple copies of virtual |
399 | baseclasses. */ | |
400 | ||
401 | static void | |
a2bd3dcd | 402 | cp_print_value (struct type *type, struct type *real_type, |
fc1a4b47 | 403 | const gdb_byte *valaddr, int offset, CORE_ADDR address, |
79a45b7d TT |
404 | struct ui_file *stream, int recurse, |
405 | const struct value_print_options *options, | |
406 | struct type **dont_print_vb) | |
c906108c | 407 | { |
c906108c | 408 | struct type **last_dont_print |
2c63a960 | 409 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
c1b6e682 | 410 | struct obstack tmp_obstack = dont_print_vb_obstack; |
c906108c | 411 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
b9d652ac DJ |
412 | int thisoffset; |
413 | struct type *thistype; | |
c906108c SS |
414 | |
415 | if (dont_print_vb == 0) | |
416 | { | |
417 | /* If we're at top level, carve out a completely fresh | |
c5aa993b JM |
418 | chunk of the obstack and use that until this particular |
419 | invocation returns. */ | |
c906108c SS |
420 | /* Bump up the high-water mark. Now alpha is omega. */ |
421 | obstack_finish (&dont_print_vb_obstack); | |
422 | } | |
423 | ||
424 | for (i = 0; i < n_baseclasses; i++) | |
425 | { | |
426 | int boffset; | |
427 | int skip; | |
428 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
429 | char *basename = TYPE_NAME (baseclass); | |
fc1a4b47 | 430 | const gdb_byte *base_valaddr; |
c906108c SS |
431 | |
432 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
433 | { | |
434 | struct type **first_dont_print | |
2c63a960 | 435 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
c906108c | 436 | |
c5aa993b | 437 | int j = (struct type **) obstack_next_free (&dont_print_vb_obstack) |
2c63a960 | 438 | - first_dont_print; |
c906108c SS |
439 | |
440 | while (--j >= 0) | |
441 | if (baseclass == first_dont_print[j]) | |
442 | goto flush_it; | |
443 | ||
444 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
445 | } | |
446 | ||
b9d652ac DJ |
447 | thisoffset = offset; |
448 | thistype = real_type; | |
086280be | 449 | |
edf3d5f3 | 450 | boffset = baseclass_offset (type, i, valaddr + offset, address + offset); |
086280be UW |
451 | skip = ((boffset == -1) || (boffset + offset) < 0) ? 1 : -1; |
452 | ||
453 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
c5aa993b | 454 | { |
086280be UW |
455 | /* The virtual base class pointer might have been |
456 | clobbered by the user program. Make sure that it | |
457 | still points to a valid memory location. */ | |
c906108c | 458 | |
086280be UW |
459 | if (boffset != -1 |
460 | && ((boffset + offset) < 0 | |
edf3d5f3 | 461 | || (boffset + offset) >= TYPE_LENGTH (real_type))) |
c5aa993b | 462 | { |
086280be UW |
463 | /* FIXME (alloca): unsafe if baseclass is really really large. */ |
464 | gdb_byte *buf = alloca (TYPE_LENGTH (baseclass)); | |
465 | base_valaddr = buf; | |
466 | if (target_read_memory (address + boffset, buf, | |
467 | TYPE_LENGTH (baseclass)) != 0) | |
468 | skip = 1; | |
469 | address = address + boffset; | |
470 | thisoffset = 0; | |
471 | boffset = 0; | |
472 | thistype = baseclass; | |
c5aa993b JM |
473 | } |
474 | else | |
475 | base_valaddr = valaddr; | |
c906108c | 476 | } |
086280be UW |
477 | else |
478 | base_valaddr = valaddr; | |
c906108c SS |
479 | |
480 | /* now do the printing */ | |
79a45b7d | 481 | if (options->pretty) |
c906108c SS |
482 | { |
483 | fprintf_filtered (stream, "\n"); | |
484 | print_spaces_filtered (2 * recurse, stream); | |
485 | } | |
486 | fputs_filtered ("<", stream); | |
487 | /* Not sure what the best notation is in the case where there is no | |
c5aa993b | 488 | baseclass name. */ |
c906108c SS |
489 | fputs_filtered (basename ? basename : "", stream); |
490 | fputs_filtered ("> = ", stream); | |
491 | ||
492 | ||
493 | if (skip >= 1) | |
494 | fprintf_filtered (stream, "<invalid address>"); | |
495 | else | |
a6bac58e TT |
496 | { |
497 | int result = 0; | |
498 | ||
499 | /* Attempt to run the Python pretty-printers on the | |
500 | baseclass if possible. */ | |
501 | if (!options->raw) | |
502 | result = apply_val_pretty_printer (baseclass, base_valaddr, | |
503 | thisoffset + boffset, | |
edf3d5f3 | 504 | address, |
a6bac58e TT |
505 | stream, recurse, |
506 | options, | |
507 | current_language); | |
508 | ||
509 | if (!result) | |
510 | cp_print_value_fields (baseclass, thistype, base_valaddr, | |
edf3d5f3 | 511 | thisoffset + boffset, address, |
a6bac58e TT |
512 | stream, recurse, options, |
513 | ((struct type **) | |
514 | obstack_base (&dont_print_vb_obstack)), | |
515 | 0); | |
516 | } | |
c906108c SS |
517 | fputs_filtered (", ", stream); |
518 | ||
519 | flush_it: | |
520 | ; | |
521 | } | |
522 | ||
523 | if (dont_print_vb == 0) | |
524 | { | |
525 | /* Free the space used to deal with the printing | |
c5aa993b | 526 | of this type from top level. */ |
c906108c SS |
527 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
528 | /* Reset watermark so that we can continue protecting | |
c5aa993b | 529 | ourselves from whatever we were protecting ourselves. */ |
c906108c SS |
530 | dont_print_vb_obstack = tmp_obstack; |
531 | } | |
532 | } | |
533 | ||
534 | /* Print value of a static member. | |
535 | To avoid infinite recursion when printing a class that contains | |
536 | a static instance of the class, we keep the addresses of all printed | |
537 | static member classes in an obstack and refuse to print them more | |
538 | than once. | |
539 | ||
79a45b7d | 540 | VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS |
c906108c SS |
541 | have the same meanings as in c_val_print. */ |
542 | ||
543 | static void | |
2c63a960 | 544 | cp_print_static_field (struct type *type, |
6943961c | 545 | struct value *val, |
2c63a960 | 546 | struct ui_file *stream, |
2c63a960 | 547 | int recurse, |
79a45b7d | 548 | const struct value_print_options *options) |
c906108c | 549 | { |
79a45b7d | 550 | struct value_print_options opts; |
ec31cde5 | 551 | |
c906108c SS |
552 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
553 | { | |
554 | CORE_ADDR *first_dont_print; | |
42ae5230 | 555 | CORE_ADDR addr; |
c906108c SS |
556 | int i; |
557 | ||
558 | first_dont_print | |
c5aa993b | 559 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
99903ae3 CM |
560 | i = obstack_object_size (&dont_print_statmem_obstack) |
561 | / sizeof (CORE_ADDR); | |
c906108c SS |
562 | |
563 | while (--i >= 0) | |
564 | { | |
42ae5230 | 565 | if (value_address (val) == first_dont_print[i]) |
c906108c | 566 | { |
2c63a960 JB |
567 | fputs_filtered ("<same as static member of an already" |
568 | " seen type>", | |
c906108c SS |
569 | stream); |
570 | return; | |
571 | } | |
572 | } | |
573 | ||
42ae5230 TT |
574 | addr = value_address (val); |
575 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
c906108c | 576 | sizeof (CORE_ADDR)); |
c906108c | 577 | CHECK_TYPEDEF (type); |
edf3d5f3 TT |
578 | cp_print_value_fields (type, value_enclosing_type (val), |
579 | value_contents_all (val), | |
42ae5230 | 580 | value_embedded_offset (val), addr, |
79a45b7d | 581 | stream, recurse, options, NULL, 1); |
c906108c SS |
582 | return; |
583 | } | |
79a45b7d | 584 | |
ec31cde5 CM |
585 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
586 | { | |
587 | struct type **first_dont_print; | |
588 | int i; | |
589 | struct type *target_type = TYPE_TARGET_TYPE (type); | |
590 | ||
591 | first_dont_print | |
592 | = (struct type **) obstack_base (&dont_print_stat_array_obstack); | |
593 | i = obstack_object_size (&dont_print_stat_array_obstack) | |
594 | / sizeof (CORE_ADDR); | |
595 | ||
596 | while (--i >= 0) | |
597 | { | |
598 | if (target_type == first_dont_print[i]) | |
599 | { | |
600 | fputs_filtered ("<same as static member of an already" | |
601 | " seen type>", | |
602 | stream); | |
603 | return; | |
604 | } | |
605 | } | |
606 | ||
607 | obstack_grow (&dont_print_stat_array_obstack, (char *) &target_type, | |
608 | sizeof (struct type *)); | |
609 | } | |
610 | ||
79a45b7d TT |
611 | opts = *options; |
612 | opts.deref_ref = 0; | |
46615f07 | 613 | val_print (type, value_contents_all (val), |
42ae5230 | 614 | value_embedded_offset (val), value_address (val), |
79a45b7d | 615 | stream, recurse, &opts, current_language); |
c906108c SS |
616 | } |
617 | ||
0d5de010 DJ |
618 | |
619 | /* Find the field in *DOMAIN, or its non-virtual base classes, with bit offset | |
620 | OFFSET. Set *DOMAIN to the containing type and *FIELDNO to the containing | |
621 | field number. If OFFSET is not exactly at the start of some field, set | |
622 | *DOMAIN to NULL. */ | |
623 | ||
2c0b251b | 624 | static void |
0d5de010 DJ |
625 | cp_find_class_member (struct type **domain_p, int *fieldno, |
626 | LONGEST offset) | |
627 | { | |
628 | struct type *domain; | |
629 | unsigned int i; | |
630 | unsigned len; | |
631 | ||
632 | *domain_p = check_typedef (*domain_p); | |
633 | domain = *domain_p; | |
634 | len = TYPE_NFIELDS (domain); | |
635 | ||
636 | for (i = TYPE_N_BASECLASSES (domain); i < len; i++) | |
637 | { | |
638 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
639 | ||
640 | QUIT; | |
641 | if (offset == bitpos) | |
642 | { | |
643 | *fieldno = i; | |
644 | return; | |
645 | } | |
646 | } | |
647 | ||
648 | for (i = 0; i < TYPE_N_BASECLASSES (domain); i++) | |
649 | { | |
650 | LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i); | |
651 | LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i)); | |
652 | ||
653 | if (offset >= bitpos && offset < bitpos + bitsize) | |
654 | { | |
655 | *domain_p = TYPE_FIELD_TYPE (domain, i); | |
656 | cp_find_class_member (domain_p, fieldno, offset - bitpos); | |
657 | return; | |
658 | } | |
659 | } | |
660 | ||
661 | *domain_p = NULL; | |
662 | } | |
663 | ||
c906108c | 664 | void |
ad4820ab | 665 | cp_print_class_member (const gdb_byte *valaddr, struct type *type, |
fba45db2 | 666 | struct ui_file *stream, char *prefix) |
c906108c | 667 | { |
e17a4113 UW |
668 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
669 | ||
c906108c SS |
670 | /* VAL is a byte offset into the structure type DOMAIN. |
671 | Find the name of the field for that offset and | |
672 | print it. */ | |
ad4820ab | 673 | struct type *domain = TYPE_DOMAIN_TYPE (type); |
e17a4113 | 674 | LONGEST val; |
0d5de010 | 675 | unsigned int fieldno; |
c906108c | 676 | |
e17a4113 UW |
677 | val = extract_signed_integer (valaddr, TYPE_LENGTH (type), byte_order); |
678 | ||
0d5de010 DJ |
679 | /* Pointers to data members are usually byte offsets into an object. |
680 | Because a data member can have offset zero, and a NULL pointer to | |
681 | member must be distinct from any valid non-NULL pointer to | |
682 | member, either the value is biased or the NULL value has a | |
683 | special representation; both are permitted by ISO C++. HP aCC | |
684 | used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x | |
685 | and other compilers which use the Itanium ABI use -1 as the NULL | |
686 | value. GDB only supports that last form; to add support for | |
687 | another form, make this into a cp-abi hook. */ | |
c906108c | 688 | |
0d5de010 | 689 | if (val == -1) |
c906108c | 690 | { |
0d5de010 DJ |
691 | fprintf_filtered (stream, "NULL"); |
692 | return; | |
c906108c | 693 | } |
0d5de010 DJ |
694 | |
695 | cp_find_class_member (&domain, &fieldno, val << 3); | |
696 | ||
697 | if (domain != NULL) | |
c906108c SS |
698 | { |
699 | char *name; | |
306d9ac5 | 700 | fputs_filtered (prefix, stream); |
c906108c SS |
701 | name = type_name_no_tag (domain); |
702 | if (name) | |
c5aa993b | 703 | fputs_filtered (name, stream); |
c906108c SS |
704 | else |
705 | c_type_print_base (domain, stream, 0, 0); | |
706 | fprintf_filtered (stream, "::"); | |
0d5de010 | 707 | fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream); |
c906108c SS |
708 | } |
709 | else | |
0d5de010 | 710 | fprintf_filtered (stream, "%ld", (long) val); |
c906108c SS |
711 | } |
712 | ||
713 | ||
c906108c | 714 | void |
fba45db2 | 715 | _initialize_cp_valprint (void) |
c906108c | 716 | { |
5bf193a2 | 717 | add_setshow_boolean_cmd ("static-members", class_support, |
79a45b7d | 718 | &user_print_options.static_field_print, _("\ |
5bf193a2 AC |
719 | Set printing of C++ static members."), _("\ |
720 | Show printing of C++ static members."), NULL, | |
721 | NULL, | |
920d2a44 | 722 | show_static_field_print, |
5bf193a2 | 723 | &setprintlist, &showprintlist); |
c906108c | 724 | |
79a45b7d TT |
725 | add_setshow_boolean_cmd ("vtbl", class_support, |
726 | &user_print_options.vtblprint, _("\ | |
5bf193a2 AC |
727 | Set printing of C++ virtual function tables."), _("\ |
728 | Show printing of C++ virtual function tables."), NULL, | |
729 | NULL, | |
920d2a44 | 730 | show_vtblprint, |
5bf193a2 AC |
731 | &setprintlist, &showprintlist); |
732 | ||
79a45b7d TT |
733 | add_setshow_boolean_cmd ("object", class_support, |
734 | &user_print_options.objectprint, _("\ | |
5bf193a2 AC |
735 | Set printing of object's derived type based on vtable info."), _("\ |
736 | Show printing of object's derived type based on vtable info."), NULL, | |
737 | NULL, | |
920d2a44 | 738 | show_objectprint, |
5bf193a2 | 739 | &setprintlist, &showprintlist); |
c906108c | 740 | |
ec31cde5 | 741 | obstack_begin (&dont_print_stat_array_obstack, 32 * sizeof (CORE_ADDR)); |
99903ae3 | 742 | obstack_begin (&dont_print_statmem_obstack, 32 * sizeof (CORE_ADDR)); |
c906108c | 743 | obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *)); |
c906108c | 744 | } |