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c906108c | 1 | /* Support for printing C values for GDB, the GNU debugger. |
1bac305b | 2 | |
32d0add0 | 3 | Copyright (C) 1986-2015 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" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "expression.h" | |
24 | #include "value.h" | |
c906108c SS |
25 | #include "valprint.h" |
26 | #include "language.h" | |
27 | #include "c-lang.h" | |
015a42b4 | 28 | #include "cp-abi.h" |
e2d0e7eb | 29 | #include "target.h" |
77e371c0 | 30 | #include "objfiles.h" |
c906108c | 31 | \f |
c5aa993b | 32 | |
96c07c5b | 33 | /* A helper for c_textual_element_type. This checks the name of the |
6c7a06a3 TT |
34 | typedef. This is bogus but it isn't apparent that the compiler |
35 | provides us the help we may need. */ | |
36 | ||
37 | static int | |
38 | textual_name (const char *name) | |
39 | { | |
40 | return (!strcmp (name, "wchar_t") | |
41 | || !strcmp (name, "char16_t") | |
42 | || !strcmp (name, "char32_t")); | |
43 | } | |
44 | ||
ea37ba09 DJ |
45 | /* Apply a heuristic to decide whether an array of TYPE or a pointer |
46 | to TYPE should be printed as a textual string. Return non-zero if | |
47 | it should, or zero if it should be treated as an array of integers | |
aff410f1 MS |
48 | or pointer to integers. FORMAT is the current format letter, or 0 |
49 | if none. | |
ea37ba09 DJ |
50 | |
51 | We guess that "char" is a character. Explicitly signed and | |
52 | unsigned character types are also characters. Integer data from | |
53 | vector types is not. The user can override this by using the /s | |
54 | format letter. */ | |
55 | ||
96c07c5b TT |
56 | int |
57 | c_textual_element_type (struct type *type, char format) | |
ea37ba09 | 58 | { |
85e306ed | 59 | struct type *true_type, *iter_type; |
ea37ba09 DJ |
60 | |
61 | if (format != 0 && format != 's') | |
62 | return 0; | |
63 | ||
85e306ed TT |
64 | /* We also rely on this for its side effect of setting up all the |
65 | typedef pointers. */ | |
66 | true_type = check_typedef (type); | |
67 | ||
ea37ba09 DJ |
68 | /* TYPE_CODE_CHAR is always textual. */ |
69 | if (TYPE_CODE (true_type) == TYPE_CODE_CHAR) | |
70 | return 1; | |
85e306ed | 71 | |
6c7a06a3 TT |
72 | /* Any other character-like types must be integral. */ |
73 | if (TYPE_CODE (true_type) != TYPE_CODE_INT) | |
74 | return 0; | |
75 | ||
85e306ed TT |
76 | /* We peel typedefs one by one, looking for a match. */ |
77 | iter_type = type; | |
78 | while (iter_type) | |
79 | { | |
80 | /* Check the name of the type. */ | |
81 | if (TYPE_NAME (iter_type) && textual_name (TYPE_NAME (iter_type))) | |
82 | return 1; | |
83 | ||
84 | if (TYPE_CODE (iter_type) != TYPE_CODE_TYPEDEF) | |
85 | break; | |
86 | ||
87 | /* Peel a single typedef. If the typedef doesn't have a target | |
88 | type, we use check_typedef and hope the result is ok -- it | |
89 | might be for C++, where wchar_t is a built-in type. */ | |
90 | if (TYPE_TARGET_TYPE (iter_type)) | |
91 | iter_type = TYPE_TARGET_TYPE (iter_type); | |
92 | else | |
93 | iter_type = check_typedef (iter_type); | |
94 | } | |
ea37ba09 DJ |
95 | |
96 | if (format == 's') | |
97 | { | |
aff410f1 MS |
98 | /* Print this as a string if we can manage it. For now, no wide |
99 | character support. */ | |
ea37ba09 DJ |
100 | if (TYPE_CODE (true_type) == TYPE_CODE_INT |
101 | && TYPE_LENGTH (true_type) == 1) | |
102 | return 1; | |
103 | } | |
104 | else | |
105 | { | |
106 | /* If a one-byte TYPE_CODE_INT is missing the not-a-character | |
107 | flag, then we treat it as text; otherwise, we assume it's | |
108 | being used as data. */ | |
109 | if (TYPE_CODE (true_type) == TYPE_CODE_INT | |
110 | && TYPE_LENGTH (true_type) == 1 | |
111 | && !TYPE_NOTTEXT (true_type)) | |
112 | return 1; | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
e88acd96 TT |
118 | /* Decorations for C. */ |
119 | ||
120 | static const struct generic_val_print_decorations c_decorations = | |
121 | { | |
122 | "", | |
123 | " + ", | |
124 | " * I", | |
125 | "true", | |
126 | "false", | |
127 | "void" | |
128 | }; | |
129 | ||
1033c33c SM |
130 | /* Print a pointer based on the type of its target. |
131 | ||
132 | Arguments to this functions are roughly the same as those in c_val_print. | |
133 | A difference is that ADDRESS is the address to print, with embedded_offset | |
134 | already added. UNRESOLVED_ELTTYPE and ELTTYPE represent the pointed type, | |
135 | respectively before and after check_typedef. */ | |
136 | ||
137 | static void | |
138 | print_unpacked_pointer (struct type *type, struct type *elttype, | |
139 | struct type *unresolved_elttype, | |
140 | const gdb_byte *valaddr, int embedded_offset, | |
141 | CORE_ADDR address, struct ui_file *stream, int recurse, | |
142 | const struct value_print_options *options) | |
143 | { | |
144 | int want_space = 0; | |
145 | struct gdbarch *gdbarch = get_type_arch (type); | |
146 | ||
147 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) | |
148 | { | |
149 | /* Try to print what function it points to. */ | |
150 | print_function_pointer_address (options, gdbarch, address, stream); | |
151 | return; | |
152 | } | |
153 | ||
154 | if (options->symbol_print) | |
155 | want_space = print_address_demangle (options, gdbarch, address, stream, | |
156 | demangle); | |
157 | else if (options->addressprint) | |
158 | { | |
159 | fputs_filtered (paddress (gdbarch, address), stream); | |
160 | want_space = 1; | |
161 | } | |
162 | ||
163 | /* For a pointer to a textual type, also print the string | |
164 | pointed to, unless pointer is null. */ | |
165 | ||
166 | if (c_textual_element_type (unresolved_elttype, options->format) | |
167 | && address != 0) | |
168 | { | |
169 | if (want_space) | |
170 | fputs_filtered (" ", stream); | |
171 | val_print_string (unresolved_elttype, NULL, address, -1, stream, options); | |
172 | } | |
173 | else if (cp_is_vtbl_member (type)) | |
174 | { | |
175 | /* Print vtbl's nicely. */ | |
176 | CORE_ADDR vt_address = unpack_pointer (type, valaddr + embedded_offset); | |
177 | struct bound_minimal_symbol msymbol = | |
178 | lookup_minimal_symbol_by_pc (vt_address); | |
179 | ||
180 | /* If 'symbol_print' is set, we did the work above. */ | |
181 | if (!options->symbol_print | |
182 | && (msymbol.minsym != NULL) | |
183 | && (vt_address == BMSYMBOL_VALUE_ADDRESS (msymbol))) | |
184 | { | |
185 | if (want_space) | |
186 | fputs_filtered (" ", stream); | |
187 | fputs_filtered (" <", stream); | |
188 | fputs_filtered (MSYMBOL_PRINT_NAME (msymbol.minsym), stream); | |
189 | fputs_filtered (">", stream); | |
190 | want_space = 1; | |
191 | } | |
192 | ||
193 | if (vt_address && options->vtblprint) | |
194 | { | |
195 | struct value *vt_val; | |
196 | struct symbol *wsym = (struct symbol *) NULL; | |
197 | struct type *wtype; | |
198 | struct block *block = (struct block *) NULL; | |
199 | struct field_of_this_result is_this_fld; | |
200 | ||
201 | if (want_space) | |
202 | fputs_filtered (" ", stream); | |
203 | ||
204 | if (msymbol.minsym != NULL) | |
205 | wsym = lookup_symbol (MSYMBOL_LINKAGE_NAME(msymbol.minsym), block, | |
206 | VAR_DOMAIN, &is_this_fld); | |
207 | ||
208 | if (wsym) | |
209 | { | |
210 | wtype = SYMBOL_TYPE (wsym); | |
211 | } | |
212 | else | |
213 | { | |
214 | wtype = unresolved_elttype; | |
215 | } | |
216 | vt_val = value_at (wtype, vt_address); | |
217 | common_val_print (vt_val, stream, recurse + 1, options, | |
218 | current_language); | |
219 | if (options->prettyformat) | |
220 | { | |
221 | fprintf_filtered (stream, "\n"); | |
222 | print_spaces_filtered (2 + 2 * recurse, stream); | |
223 | } | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
0b6ef777 | 228 | /* c_val_print helper for TYPE_CODE_ARRAY. */ |
c906108c | 229 | |
0b6ef777 SM |
230 | static void |
231 | c_val_print_array (struct type *type, const gdb_byte *valaddr, | |
232 | int embedded_offset, CORE_ADDR address, | |
233 | struct ui_file *stream, int recurse, | |
234 | const struct value *original_value, | |
235 | const struct value_print_options *options) | |
c906108c | 236 | { |
0b6ef777 SM |
237 | struct type *unresolved_elttype = TYPE_TARGET_TYPE (type); |
238 | struct type *elttype = check_typedef (unresolved_elttype); | |
c906108c | 239 | |
0b6ef777 | 240 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (unresolved_elttype) > 0) |
c906108c | 241 | { |
0b6ef777 SM |
242 | LONGEST low_bound, high_bound; |
243 | int eltlen, len; | |
244 | struct gdbarch *gdbarch = get_type_arch (type); | |
245 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
246 | unsigned int i = 0; /* Number of characters printed. */ | |
247 | ||
248 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
249 | error (_("Could not determine the array high bound")); | |
250 | ||
251 | eltlen = TYPE_LENGTH (elttype); | |
252 | len = high_bound - low_bound + 1; | |
253 | if (options->prettyformat_arrays) | |
c906108c | 254 | { |
0b6ef777 SM |
255 | print_spaces_filtered (2 + 2 * recurse, stream); |
256 | } | |
dbc98a8b | 257 | |
0b6ef777 SM |
258 | /* Print arrays of textual chars with a string syntax, as |
259 | long as the entire array is valid. */ | |
260 | if (c_textual_element_type (unresolved_elttype, | |
261 | options->format) | |
262 | && value_bytes_available (original_value, embedded_offset, | |
263 | TYPE_LENGTH (type)) | |
264 | && !value_bits_any_optimized_out (original_value, | |
265 | TARGET_CHAR_BIT * embedded_offset, | |
266 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
267 | { | |
268 | int force_ellipses = 0; | |
ea37ba09 | 269 | |
0b6ef777 SM |
270 | /* If requested, look for the first null char and only |
271 | print elements up to it. */ | |
272 | if (options->stop_print_at_null) | |
c906108c | 273 | { |
0b6ef777 SM |
274 | unsigned int temp_len; |
275 | ||
276 | for (temp_len = 0; | |
277 | (temp_len < len | |
278 | && temp_len < options->print_max | |
279 | && extract_unsigned_integer (valaddr + embedded_offset | |
280 | + temp_len * eltlen, | |
281 | eltlen, byte_order) != 0); | |
282 | ++temp_len) | |
283 | ; | |
284 | ||
285 | /* Force LA_PRINT_STRING to print ellipses if | |
286 | we've printed the maximum characters and | |
287 | the next character is not \000. */ | |
288 | if (temp_len == options->print_max && temp_len < len) | |
c906108c | 289 | { |
0b6ef777 SM |
290 | ULONGEST val |
291 | = extract_unsigned_integer (valaddr + embedded_offset | |
292 | + temp_len * eltlen, | |
293 | eltlen, byte_order); | |
294 | if (val != 0) | |
295 | force_ellipses = 1; | |
c906108c | 296 | } |
c5aa993b | 297 | |
0b6ef777 SM |
298 | len = temp_len; |
299 | } | |
300 | ||
301 | LA_PRINT_STRING (stream, unresolved_elttype, | |
302 | valaddr + embedded_offset, len, | |
303 | NULL, force_ellipses, options); | |
304 | i = len; | |
305 | } | |
306 | else | |
307 | { | |
308 | fprintf_filtered (stream, "{"); | |
309 | /* If this is a virtual function table, print the 0th | |
310 | entry specially, and the rest of the members | |
311 | normally. */ | |
312 | if (cp_is_vtbl_ptr_type (elttype)) | |
313 | { | |
314 | i = 1; | |
315 | fprintf_filtered (stream, _("%d vtable entries"), | |
316 | len - 1); | |
c906108c SS |
317 | } |
318 | else | |
319 | { | |
0b6ef777 | 320 | i = 0; |
c906108c | 321 | } |
0b6ef777 SM |
322 | val_print_array_elements (type, valaddr, embedded_offset, |
323 | address, stream, | |
324 | recurse, original_value, options, i); | |
325 | fprintf_filtered (stream, "}"); | |
c906108c | 326 | } |
0b6ef777 SM |
327 | } |
328 | else | |
329 | { | |
1033c33c SM |
330 | /* Array of unspecified length: treat like pointer to first elt. */ |
331 | print_unpacked_pointer (type, elttype, unresolved_elttype, valaddr, | |
332 | embedded_offset, address + embedded_offset, | |
333 | stream, recurse, options); | |
0b6ef777 SM |
334 | } |
335 | } | |
336 | ||
1c67f032 SM |
337 | /* c_val_print helper for TYPE_CODE_PTR. */ |
338 | ||
339 | static void | |
340 | c_val_print_ptr (struct type *type, const gdb_byte *valaddr, | |
341 | int embedded_offset, struct ui_file *stream, int recurse, | |
342 | const struct value *original_value, | |
343 | const struct value_print_options *options) | |
344 | { | |
345 | if (options->format && options->format != 's') | |
346 | { | |
347 | val_print_scalar_formatted (type, valaddr, embedded_offset, | |
348 | original_value, options, 0, stream); | |
349 | } | |
350 | else if (options->vtblprint && cp_is_vtbl_ptr_type (type)) | |
351 | { | |
352 | /* Print the unmangled name if desired. */ | |
353 | /* Print vtable entry - we only get here if we ARE using | |
354 | -fvtable_thunks. (Otherwise, look under | |
355 | TYPE_CODE_STRUCT.) */ | |
356 | CORE_ADDR addr | |
357 | = extract_typed_address (valaddr + embedded_offset, type); | |
358 | struct gdbarch *gdbarch = get_type_arch (type); | |
359 | ||
360 | print_function_pointer_address (options, gdbarch, addr, stream); | |
361 | } | |
362 | else | |
363 | { | |
364 | struct type *unresolved_elttype = TYPE_TARGET_TYPE (type); | |
365 | struct type *elttype = check_typedef (unresolved_elttype); | |
366 | CORE_ADDR addr = unpack_pointer (type, valaddr + embedded_offset); | |
367 | ||
368 | print_unpacked_pointer (type, elttype, unresolved_elttype, valaddr, | |
369 | embedded_offset, addr, stream, recurse, options); | |
370 | } | |
371 | } | |
372 | ||
9e4f353c SM |
373 | /* c_val_print helper for TYPE_CODE_STRUCT. */ |
374 | ||
375 | static void | |
376 | c_val_print_struct (struct type *type, const gdb_byte *valaddr, | |
377 | int embedded_offset, CORE_ADDR address, | |
378 | struct ui_file *stream, int recurse, | |
379 | const struct value *original_value, | |
380 | const struct value_print_options *options) | |
381 | { | |
382 | if (options->vtblprint && cp_is_vtbl_ptr_type (type)) | |
383 | { | |
384 | /* Print the unmangled name if desired. */ | |
385 | /* Print vtable entry - we only get here if NOT using | |
386 | -fvtable_thunks. (Otherwise, look under | |
387 | TYPE_CODE_PTR.) */ | |
388 | struct gdbarch *gdbarch = get_type_arch (type); | |
389 | int offset = (embedded_offset | |
390 | + TYPE_FIELD_BITPOS (type, | |
391 | VTBL_FNADDR_OFFSET) / 8); | |
392 | struct type *field_type = TYPE_FIELD_TYPE (type, VTBL_FNADDR_OFFSET); | |
393 | CORE_ADDR addr = extract_typed_address (valaddr + offset, field_type); | |
394 | ||
395 | print_function_pointer_address (options, gdbarch, addr, stream); | |
396 | } | |
397 | else | |
398 | cp_print_value_fields_rtti (type, valaddr, | |
399 | embedded_offset, address, | |
400 | stream, recurse, | |
401 | original_value, options, | |
402 | NULL, 0); | |
403 | } | |
404 | ||
405 | /* c_val_print helper for TYPE_CODE_UNION. */ | |
406 | ||
407 | static void | |
408 | c_val_print_union (struct type *type, const gdb_byte *valaddr, | |
409 | int embedded_offset, CORE_ADDR address, | |
410 | struct ui_file *stream, int recurse, | |
411 | const struct value *original_value, | |
412 | const struct value_print_options *options) | |
413 | { | |
414 | if (recurse && !options->unionprint) | |
415 | { | |
416 | fprintf_filtered (stream, "{...}"); | |
417 | } | |
418 | else | |
419 | { | |
420 | c_val_print_struct (type, valaddr, embedded_offset, address, stream, | |
421 | recurse, original_value, options); | |
422 | } | |
423 | } | |
424 | ||
49f7fe28 SM |
425 | /* c_val_print helper for TYPE_CODE_INT. */ |
426 | ||
427 | static void | |
428 | c_val_print_int (struct type *type, struct type *unresolved_type, | |
429 | const gdb_byte *valaddr, int embedded_offset, | |
430 | struct ui_file *stream, const struct value *original_value, | |
431 | const struct value_print_options *options) | |
432 | { | |
433 | if (options->format || options->output_format) | |
434 | { | |
435 | struct value_print_options opts = *options; | |
436 | ||
437 | opts.format = (options->format ? options->format | |
438 | : options->output_format); | |
439 | val_print_scalar_formatted (type, valaddr, embedded_offset, | |
440 | original_value, &opts, 0, stream); | |
441 | } | |
442 | else | |
443 | { | |
444 | val_print_type_code_int (type, valaddr + embedded_offset, | |
445 | stream); | |
446 | /* C and C++ has no single byte int type, char is used | |
447 | instead. Since we don't know whether the value is really | |
448 | intended to be used as an integer or a character, print | |
449 | the character equivalent as well. */ | |
450 | if (c_textual_element_type (unresolved_type, options->format)) | |
451 | { | |
452 | fputs_filtered (" ", stream); | |
453 | LA_PRINT_CHAR (unpack_long (type, valaddr + embedded_offset), | |
454 | unresolved_type, stream); | |
455 | } | |
456 | } | |
457 | } | |
458 | ||
938c69a1 SM |
459 | /* c_val_print helper for TYPE_CODE_MEMBERPTR. */ |
460 | ||
461 | static void | |
462 | c_val_print_memberptr (struct type *type, const gdb_byte *valaddr, | |
463 | int embedded_offset, CORE_ADDR address, | |
464 | struct ui_file *stream, int recurse, | |
465 | const struct value *original_value, | |
466 | const struct value_print_options *options) | |
467 | { | |
468 | if (!options->format) | |
469 | { | |
470 | cp_print_class_member (valaddr + embedded_offset, type, stream, "&"); | |
471 | } | |
472 | else | |
473 | { | |
474 | generic_val_print (type, valaddr, embedded_offset, address, stream, | |
475 | recurse, original_value, options, &c_decorations); | |
476 | } | |
477 | } | |
478 | ||
0b6ef777 SM |
479 | /* See val_print for a description of the various parameters of this |
480 | function; they are identical. */ | |
481 | ||
482 | void | |
483 | c_val_print (struct type *type, const gdb_byte *valaddr, | |
484 | int embedded_offset, CORE_ADDR address, | |
485 | struct ui_file *stream, int recurse, | |
486 | const struct value *original_value, | |
487 | const struct value_print_options *options) | |
488 | { | |
0b6ef777 | 489 | struct type *unresolved_type = type; |
0b6ef777 | 490 | |
f168693b | 491 | type = check_typedef (type); |
0b6ef777 SM |
492 | switch (TYPE_CODE (type)) |
493 | { | |
494 | case TYPE_CODE_ARRAY: | |
495 | c_val_print_array (type, valaddr, embedded_offset, address, stream, | |
496 | recurse, original_value, options); | |
1033c33c | 497 | break; |
c906108c | 498 | |
0d5de010 DJ |
499 | case TYPE_CODE_METHODPTR: |
500 | cplus_print_method_ptr (valaddr + embedded_offset, type, stream); | |
501 | break; | |
502 | ||
c906108c | 503 | case TYPE_CODE_PTR: |
1c67f032 SM |
504 | c_val_print_ptr (type, valaddr, embedded_offset, stream, recurse, |
505 | original_value, options); | |
c906108c SS |
506 | break; |
507 | ||
c906108c | 508 | case TYPE_CODE_UNION: |
9e4f353c SM |
509 | c_val_print_union (type, valaddr, embedded_offset, address, stream, |
510 | recurse, original_value, options); | |
511 | break; | |
512 | ||
c906108c | 513 | case TYPE_CODE_STRUCT: |
9e4f353c SM |
514 | c_val_print_struct (type, valaddr, embedded_offset, address, stream, |
515 | recurse, original_value, options); | |
c906108c SS |
516 | break; |
517 | ||
c906108c | 518 | case TYPE_CODE_INT: |
49f7fe28 SM |
519 | c_val_print_int (type, unresolved_type, valaddr, embedded_offset, stream, |
520 | original_value, options); | |
c906108c SS |
521 | break; |
522 | ||
e88acd96 | 523 | case TYPE_CODE_MEMBERPTR: |
938c69a1 SM |
524 | c_val_print_memberptr (type, valaddr, embedded_offset, address, stream, |
525 | recurse, original_value, options); | |
526 | break; | |
c906108c | 527 | |
e88acd96 TT |
528 | case TYPE_CODE_REF: |
529 | case TYPE_CODE_ENUM: | |
530 | case TYPE_CODE_FLAGS: | |
531 | case TYPE_CODE_FUNC: | |
532 | case TYPE_CODE_METHOD: | |
533 | case TYPE_CODE_BOOL: | |
534 | case TYPE_CODE_RANGE: | |
c906108c | 535 | case TYPE_CODE_FLT: |
7678ef8f | 536 | case TYPE_CODE_DECFLOAT: |
c906108c | 537 | case TYPE_CODE_VOID: |
c906108c | 538 | case TYPE_CODE_ERROR: |
c906108c | 539 | case TYPE_CODE_UNDEF: |
fca9e603 | 540 | case TYPE_CODE_COMPLEX: |
e88acd96 | 541 | case TYPE_CODE_CHAR: |
c906108c | 542 | default: |
e88acd96 TT |
543 | generic_val_print (type, valaddr, embedded_offset, address, |
544 | stream, recurse, original_value, options, | |
545 | &c_decorations); | |
546 | break; | |
c906108c SS |
547 | } |
548 | gdb_flush (stream); | |
c906108c SS |
549 | } |
550 | \f | |
8e069a98 | 551 | void |
79a45b7d TT |
552 | c_value_print (struct value *val, struct ui_file *stream, |
553 | const struct value_print_options *options) | |
c906108c | 554 | { |
6c7a06a3 | 555 | struct type *type, *real_type, *val_type; |
c906108c | 556 | int full, top, using_enc; |
79a45b7d TT |
557 | struct value_print_options opts = *options; |
558 | ||
559 | opts.deref_ref = 1; | |
c5aa993b | 560 | |
c906108c SS |
561 | /* If it is a pointer, indicate what it points to. |
562 | ||
563 | Print type also if it is a reference. | |
564 | ||
565 | C++: if it is a member pointer, we will take care | |
566 | of that when we print it. */ | |
88750304 | 567 | |
6c7a06a3 TT |
568 | /* Preserve the original type before stripping typedefs. We prefer |
569 | to pass down the original type when possible, but for local | |
570 | checks it is better to look past the typedefs. */ | |
571 | val_type = value_type (val); | |
572 | type = check_typedef (val_type); | |
88750304 DJ |
573 | |
574 | if (TYPE_CODE (type) == TYPE_CODE_PTR | |
575 | || TYPE_CODE (type) == TYPE_CODE_REF) | |
c906108c SS |
576 | { |
577 | /* Hack: remove (char *) for char strings. Their | |
ea37ba09 | 578 | type is indicated by the quoted string anyway. |
96c07c5b | 579 | (Don't use c_textual_element_type here; quoted strings |
6c7a06a3 TT |
580 | are always exactly (char *), (wchar_t *), or the like. */ |
581 | if (TYPE_CODE (val_type) == TYPE_CODE_PTR | |
582 | && TYPE_NAME (val_type) == NULL | |
583 | && TYPE_NAME (TYPE_TARGET_TYPE (val_type)) != NULL | |
aff410f1 MS |
584 | && (strcmp (TYPE_NAME (TYPE_TARGET_TYPE (val_type)), |
585 | "char") == 0 | |
6c7a06a3 | 586 | || textual_name (TYPE_NAME (TYPE_TARGET_TYPE (val_type))))) |
c906108c | 587 | { |
aff410f1 | 588 | /* Print nothing. */ |
c906108c | 589 | } |
79a45b7d | 590 | else if (options->objectprint |
4753d33b | 591 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)) |
c5aa993b | 592 | { |
5f2e6b00 TT |
593 | int is_ref = TYPE_CODE (type) == TYPE_CODE_REF; |
594 | ||
595 | if (is_ref) | |
596 | val = value_addr (val); | |
070ad9f0 | 597 | |
aff410f1 | 598 | /* Pointer to class, check real type of object. */ |
c906108c | 599 | fprintf_filtered (stream, "("); |
ec0a52e1 PA |
600 | |
601 | if (value_entirely_available (val)) | |
602 | { | |
dfcee124 AG |
603 | real_type = value_rtti_indirect_type (val, &full, &top, |
604 | &using_enc); | |
ec0a52e1 PA |
605 | if (real_type) |
606 | { | |
607 | /* RTTI entry found. */ | |
dfcee124 AG |
608 | type = real_type; |
609 | ||
ec0a52e1 | 610 | /* Need to adjust pointer value. */ |
5f2e6b00 TT |
611 | val = value_from_pointer (real_type, |
612 | value_as_address (val) - top); | |
613 | ||
614 | if (is_ref) | |
615 | { | |
616 | val = value_ref (value_ind (val)); | |
617 | type = value_type (val); | |
618 | } | |
ec0a52e1 PA |
619 | |
620 | /* Note: When we look up RTTI entries, we don't get | |
621 | any information on const or volatile | |
622 | attributes. */ | |
623 | } | |
624 | } | |
c4093a6a | 625 | type_print (type, "", stream, -1); |
c906108c | 626 | fprintf_filtered (stream, ") "); |
6c7a06a3 | 627 | val_type = type; |
c5aa993b | 628 | } |
c906108c SS |
629 | else |
630 | { | |
c5aa993b | 631 | /* normal case */ |
c906108c | 632 | fprintf_filtered (stream, "("); |
88750304 | 633 | type_print (value_type (val), "", stream, -1); |
c906108c SS |
634 | fprintf_filtered (stream, ") "); |
635 | } | |
636 | } | |
88750304 | 637 | |
42be36b3 CT |
638 | if (!value_initialized (val)) |
639 | fprintf_filtered (stream, " [uninitialized] "); | |
640 | ||
4753d33b | 641 | if (options->objectprint && (TYPE_CODE (type) == TYPE_CODE_STRUCT)) |
c906108c | 642 | { |
aff410f1 | 643 | /* Attempt to determine real type of object. */ |
c906108c | 644 | real_type = value_rtti_type (val, &full, &top, &using_enc); |
c5aa993b JM |
645 | if (real_type) |
646 | { | |
aff410f1 MS |
647 | /* We have RTTI information, so use it. */ |
648 | val = value_full_object (val, real_type, | |
649 | full, top, using_enc); | |
c5aa993b JM |
650 | fprintf_filtered (stream, "(%s%s) ", |
651 | TYPE_NAME (real_type), | |
3d263c1d | 652 | full ? "" : _(" [incomplete object]")); |
aff410f1 MS |
653 | /* Print out object: enclosing type is same as real_type if |
654 | full. */ | |
8e069a98 TT |
655 | val_print (value_enclosing_type (val), |
656 | value_contents_for_printing (val), 0, | |
657 | value_address (val), stream, 0, | |
658 | val, &opts, current_language); | |
659 | return; | |
aff410f1 MS |
660 | /* Note: When we look up RTTI entries, we don't get any |
661 | information on const or volatile attributes. */ | |
c5aa993b | 662 | } |
88750304 | 663 | else if (type != check_typedef (value_enclosing_type (val))) |
c5aa993b | 664 | { |
aff410f1 | 665 | /* No RTTI information, so let's do our best. */ |
c5aa993b | 666 | fprintf_filtered (stream, "(%s ?) ", |
4754a64e | 667 | TYPE_NAME (value_enclosing_type (val))); |
8e069a98 TT |
668 | val_print (value_enclosing_type (val), |
669 | value_contents_for_printing (val), 0, | |
670 | value_address (val), stream, 0, | |
671 | val, &opts, current_language); | |
672 | return; | |
c5aa993b | 673 | } |
aff410f1 | 674 | /* Otherwise, we end up at the return outside this "if". */ |
c906108c | 675 | } |
c5aa993b | 676 | |
8e069a98 TT |
677 | val_print (val_type, value_contents_for_printing (val), |
678 | value_embedded_offset (val), | |
679 | value_address (val), | |
680 | stream, 0, | |
681 | val, &opts, current_language); | |
c906108c | 682 | } |