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373a8247 | 1 | /* Support for printing Pascal values for GDB, the GNU debugger. |
5bcca90b | 2 | |
b811d2c2 | 3 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
373a8247 PM |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 |
373a8247 PM |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
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/>. */ |
373a8247 PM |
19 | |
20 | /* This file is derived from c-valprint.c */ | |
21 | ||
22 | #include "defs.h" | |
04ea0df1 | 23 | #include "gdb_obstack.h" |
373a8247 PM |
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 "gdbcore.h" | |
31 | #include "demangle.h" | |
32 | #include "valprint.h" | |
3172dc30 | 33 | #include "typeprint.h" |
373a8247 PM |
34 | #include "language.h" |
35 | #include "target.h" | |
36 | #include "annotate.h" | |
37 | #include "p-lang.h" | |
eb43544b | 38 | #include "cp-abi.h" |
d3cbe7ef | 39 | #include "cp-support.h" |
77e371c0 | 40 | #include "objfiles.h" |
268a13a5 | 41 | #include "gdbsupport/byte-vector.h" |
7f6aba03 | 42 | #include "cli/cli-style.h" |
373a8247 PM |
43 | \f |
44 | ||
07a32858 TT |
45 | static void pascal_object_print_value_fields (struct value *, struct ui_file *, |
46 | int, | |
47 | const struct value_print_options *, | |
48 | struct type **, int); | |
49 | ||
e88acd96 TT |
50 | /* Decorations for Pascal. */ |
51 | ||
52 | static const struct generic_val_print_decorations p_decorations = | |
53 | { | |
54 | "", | |
55 | " + ", | |
56 | " * I", | |
57 | "true", | |
58 | "false", | |
00272ec4 TT |
59 | "void", |
60 | "{", | |
61 | "}" | |
e88acd96 TT |
62 | }; |
63 | ||
426a9c18 | 64 | /* See p-lang.h. */ |
373a8247 | 65 | |
d3eab38a | 66 | void |
426a9c18 TT |
67 | pascal_value_print_inner (struct value *val, struct ui_file *stream, |
68 | int recurse, | |
69 | const struct value_print_options *options) | |
70 | ||
373a8247 | 71 | { |
426a9c18 | 72 | struct type *type = check_typedef (value_type (val)); |
5af949e3 | 73 | struct gdbarch *gdbarch = get_type_arch (type); |
34877895 | 74 | enum bfd_endian byte_order = type_byte_order (type); |
52f0bd74 | 75 | unsigned int i = 0; /* Number of characters printed */ |
373a8247 PM |
76 | unsigned len; |
77 | struct type *elttype; | |
78 | unsigned eltlen; | |
5598ce11 | 79 | int length_pos, length_size, string_pos; |
6c7a06a3 | 80 | struct type *char_type; |
373a8247 | 81 | CORE_ADDR addr; |
b012acdd | 82 | int want_space = 0; |
426a9c18 | 83 | const gdb_byte *valaddr = value_contents_for_printing (val); |
373a8247 | 84 | |
373a8247 PM |
85 | switch (TYPE_CODE (type)) |
86 | { | |
87 | case TYPE_CODE_ARRAY: | |
b926417a TT |
88 | { |
89 | LONGEST low_bound, high_bound; | |
373a8247 | 90 | |
b926417a TT |
91 | if (get_array_bounds (type, &low_bound, &high_bound)) |
92 | { | |
93 | len = high_bound - low_bound + 1; | |
94 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); | |
95 | eltlen = TYPE_LENGTH (elttype); | |
b926417a TT |
96 | /* If 's' format is used, try to print out as string. |
97 | If no format is given, print as string if element type | |
98 | is of TYPE_CODE_CHAR and element size is 1,2 or 4. */ | |
99 | if (options->format == 's' | |
100 | || ((eltlen == 1 || eltlen == 2 || eltlen == 4) | |
101 | && TYPE_CODE (elttype) == TYPE_CODE_CHAR | |
102 | && options->format == 0)) | |
103 | { | |
104 | /* If requested, look for the first null char and only print | |
105 | elements up to it. */ | |
106 | if (options->stop_print_at_null) | |
107 | { | |
108 | unsigned int temp_len; | |
109 | ||
110 | /* Look for a NULL char. */ | |
111 | for (temp_len = 0; | |
426a9c18 TT |
112 | extract_unsigned_integer (valaddr + temp_len * eltlen, |
113 | eltlen, byte_order) | |
b926417a TT |
114 | && temp_len < len && temp_len < options->print_max; |
115 | temp_len++); | |
116 | len = temp_len; | |
117 | } | |
118 | ||
119 | LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type), | |
426a9c18 | 120 | valaddr, len, NULL, 0, options); |
b926417a TT |
121 | i = len; |
122 | } | |
123 | else | |
124 | { | |
125 | fprintf_filtered (stream, "{"); | |
126 | /* If this is a virtual function table, print the 0th | |
127 | entry specially, and the rest of the members normally. */ | |
128 | if (pascal_object_is_vtbl_ptr_type (elttype)) | |
129 | { | |
130 | i = 1; | |
131 | fprintf_filtered (stream, "%d vtable entries", len - 1); | |
132 | } | |
133 | else | |
134 | { | |
135 | i = 0; | |
136 | } | |
426a9c18 | 137 | value_print_array_elements (val, stream, recurse, options, i); |
b926417a TT |
138 | fprintf_filtered (stream, "}"); |
139 | } | |
140 | break; | |
141 | } | |
142 | /* Array of unspecified length: treat like pointer to first elt. */ | |
426a9c18 | 143 | addr = value_address (val); |
b926417a | 144 | } |
373a8247 PM |
145 | goto print_unpacked_pointer; |
146 | ||
147 | case TYPE_CODE_PTR: | |
79a45b7d | 148 | if (options->format && options->format != 's') |
373a8247 | 149 | { |
426a9c18 | 150 | value_print_scalar_formatted (val, options, 0, stream); |
373a8247 PM |
151 | break; |
152 | } | |
79a45b7d | 153 | if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
373a8247 PM |
154 | { |
155 | /* Print the unmangled name if desired. */ | |
156 | /* Print vtable entry - we only get here if we ARE using | |
0df8b418 | 157 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */ |
b276f1bb | 158 | /* Extract the address, assume that it is unsigned. */ |
426a9c18 | 159 | addr = extract_unsigned_integer (valaddr, |
e17a4113 | 160 | TYPE_LENGTH (type), byte_order); |
edf0c1b7 | 161 | print_address_demangle (options, gdbarch, addr, stream, demangle); |
373a8247 PM |
162 | break; |
163 | } | |
91e8df85 | 164 | check_typedef (TYPE_TARGET_TYPE (type)); |
e13eedd5 | 165 | |
426a9c18 | 166 | addr = unpack_pointer (type, valaddr); |
e13eedd5 PM |
167 | print_unpacked_pointer: |
168 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); | |
169 | ||
170 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) | |
373a8247 | 171 | { |
e13eedd5 | 172 | /* Try to print what function it points to. */ |
edf0c1b7 | 173 | print_address_demangle (options, gdbarch, addr, stream, demangle); |
d3eab38a | 174 | return; |
e13eedd5 | 175 | } |
373a8247 | 176 | |
e13eedd5 PM |
177 | if (options->addressprint && options->format != 's') |
178 | { | |
179 | fputs_filtered (paddress (gdbarch, addr), stream); | |
b012acdd | 180 | want_space = 1; |
e13eedd5 | 181 | } |
373a8247 | 182 | |
e13eedd5 PM |
183 | /* For a pointer to char or unsigned char, also print the string |
184 | pointed to, unless pointer is null. */ | |
185 | if (((TYPE_LENGTH (elttype) == 1 | |
186 | && (TYPE_CODE (elttype) == TYPE_CODE_INT | |
187 | || TYPE_CODE (elttype) == TYPE_CODE_CHAR)) | |
188 | || ((TYPE_LENGTH (elttype) == 2 || TYPE_LENGTH (elttype) == 4) | |
189 | && TYPE_CODE (elttype) == TYPE_CODE_CHAR)) | |
190 | && (options->format == 0 || options->format == 's') | |
191 | && addr != 0) | |
192 | { | |
b012acdd TT |
193 | if (want_space) |
194 | fputs_filtered (" ", stream); | |
0df8b418 | 195 | /* No wide string yet. */ |
09ca9e2e | 196 | i = val_print_string (elttype, NULL, addr, -1, stream, options); |
e13eedd5 | 197 | } |
0df8b418 | 198 | /* Also for pointers to pascal strings. */ |
e13eedd5 PM |
199 | /* Note: this is Free Pascal specific: |
200 | as GDB does not recognize stabs pascal strings | |
201 | Pascal strings are mapped to records | |
0df8b418 | 202 | with lowercase names PM. */ |
e13eedd5 PM |
203 | if (is_pascal_string_type (elttype, &length_pos, &length_size, |
204 | &string_pos, &char_type, NULL) | |
205 | && addr != 0) | |
206 | { | |
207 | ULONGEST string_length; | |
7c543f7b | 208 | gdb_byte *buffer; |
ad3bbd48 | 209 | |
b012acdd TT |
210 | if (want_space) |
211 | fputs_filtered (" ", stream); | |
7c543f7b | 212 | buffer = (gdb_byte *) xmalloc (length_size); |
e13eedd5 PM |
213 | read_memory (addr + length_pos, buffer, length_size); |
214 | string_length = extract_unsigned_integer (buffer, length_size, | |
215 | byte_order); | |
216 | xfree (buffer); | |
09ca9e2e TT |
217 | i = val_print_string (char_type, NULL, |
218 | addr + string_pos, string_length, | |
219 | stream, options); | |
e13eedd5 PM |
220 | } |
221 | else if (pascal_object_is_vtbl_member (type)) | |
222 | { | |
0df8b418 | 223 | /* Print vtbl's nicely. */ |
426a9c18 | 224 | CORE_ADDR vt_address = unpack_pointer (type, valaddr); |
7cbd4a93 | 225 | struct bound_minimal_symbol msymbol = |
ad3bbd48 MS |
226 | lookup_minimal_symbol_by_pc (vt_address); |
227 | ||
9cb709b6 TT |
228 | /* If 'symbol_print' is set, we did the work above. */ |
229 | if (!options->symbol_print | |
7cbd4a93 | 230 | && (msymbol.minsym != NULL) |
77e371c0 | 231 | && (vt_address == BMSYMBOL_VALUE_ADDRESS (msymbol))) |
373a8247 | 232 | { |
b012acdd TT |
233 | if (want_space) |
234 | fputs_filtered (" ", stream); | |
235 | fputs_filtered ("<", stream); | |
c9d95fa3 | 236 | fputs_filtered (msymbol.minsym->print_name (), stream); |
e13eedd5 | 237 | fputs_filtered (">", stream); |
b012acdd | 238 | want_space = 1; |
373a8247 | 239 | } |
e13eedd5 | 240 | if (vt_address && options->vtblprint) |
373a8247 | 241 | { |
e13eedd5 | 242 | struct value *vt_val; |
be903358 | 243 | struct symbol *wsym = NULL; |
e13eedd5 | 244 | struct type *wtype; |
373a8247 | 245 | |
b012acdd TT |
246 | if (want_space) |
247 | fputs_filtered (" ", stream); | |
248 | ||
7cbd4a93 | 249 | if (msymbol.minsym != NULL) |
de63c46b | 250 | { |
c9d95fa3 | 251 | const char *search_name = msymbol.minsym->search_name (); |
582942f4 | 252 | wsym = lookup_symbol_search_name (search_name, NULL, |
de63c46b PA |
253 | VAR_DOMAIN).symbol; |
254 | } | |
e13eedd5 PM |
255 | |
256 | if (wsym) | |
373a8247 | 257 | { |
e13eedd5 | 258 | wtype = SYMBOL_TYPE (wsym); |
373a8247 | 259 | } |
e13eedd5 | 260 | else |
373a8247 | 261 | { |
e13eedd5 PM |
262 | wtype = TYPE_TARGET_TYPE (type); |
263 | } | |
264 | vt_val = value_at (wtype, vt_address); | |
265 | common_val_print (vt_val, stream, recurse + 1, options, | |
266 | current_language); | |
2a998fc0 | 267 | if (options->prettyformat) |
e13eedd5 PM |
268 | { |
269 | fprintf_filtered (stream, "\n"); | |
270 | print_spaces_filtered (2 + 2 * recurse, stream); | |
373a8247 PM |
271 | } |
272 | } | |
373a8247 | 273 | } |
e13eedd5 | 274 | |
d3eab38a | 275 | return; |
373a8247 | 276 | |
373a8247 | 277 | case TYPE_CODE_REF: |
e88acd96 TT |
278 | case TYPE_CODE_ENUM: |
279 | case TYPE_CODE_FLAGS: | |
280 | case TYPE_CODE_FUNC: | |
281 | case TYPE_CODE_RANGE: | |
282 | case TYPE_CODE_INT: | |
283 | case TYPE_CODE_FLT: | |
284 | case TYPE_CODE_VOID: | |
285 | case TYPE_CODE_ERROR: | |
286 | case TYPE_CODE_UNDEF: | |
287 | case TYPE_CODE_BOOL: | |
288 | case TYPE_CODE_CHAR: | |
426a9c18 | 289 | generic_value_print (val, stream, recurse, options, &p_decorations); |
373a8247 PM |
290 | break; |
291 | ||
292 | case TYPE_CODE_UNION: | |
79a45b7d | 293 | if (recurse && !options->unionprint) |
373a8247 PM |
294 | { |
295 | fprintf_filtered (stream, "{...}"); | |
296 | break; | |
297 | } | |
298 | /* Fall through. */ | |
299 | case TYPE_CODE_STRUCT: | |
79a45b7d | 300 | if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
373a8247 PM |
301 | { |
302 | /* Print the unmangled name if desired. */ | |
303 | /* Print vtable entry - we only get here if NOT using | |
0df8b418 | 304 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */ |
b276f1bb AC |
305 | /* Extract the address, assume that it is unsigned. */ |
306 | print_address_demangle | |
edf0c1b7 | 307 | (options, gdbarch, |
426a9c18 | 308 | extract_unsigned_integer (valaddr |
3e43a32a MS |
309 | + TYPE_FIELD_BITPOS (type, |
310 | VTBL_FNADDR_OFFSET) / 8, | |
311 | TYPE_LENGTH (TYPE_FIELD_TYPE (type, | |
312 | VTBL_FNADDR_OFFSET)), | |
313 | byte_order), | |
b276f1bb | 314 | stream, demangle); |
373a8247 PM |
315 | } |
316 | else | |
317 | { | |
5598ce11 | 318 | if (is_pascal_string_type (type, &length_pos, &length_size, |
6c7a06a3 | 319 | &string_pos, &char_type, NULL)) |
373a8247 | 320 | { |
426a9c18 TT |
321 | len = extract_unsigned_integer (valaddr + length_pos, |
322 | length_size, byte_order); | |
323 | LA_PRINT_STRING (stream, char_type, valaddr + string_pos, | |
be759fcf | 324 | len, NULL, 0, options); |
373a8247 PM |
325 | } |
326 | else | |
426a9c18 TT |
327 | pascal_object_print_value_fields (val, stream, recurse, |
328 | options, NULL, 0); | |
373a8247 PM |
329 | } |
330 | break; | |
331 | ||
373a8247 PM |
332 | case TYPE_CODE_SET: |
333 | elttype = TYPE_INDEX_TYPE (type); | |
f168693b | 334 | elttype = check_typedef (elttype); |
74a9bb82 | 335 | if (TYPE_STUB (elttype)) |
373a8247 | 336 | { |
7f6aba03 | 337 | fprintf_styled (stream, metadata_style.style (), "<incomplete type>"); |
373a8247 PM |
338 | break; |
339 | } | |
340 | else | |
341 | { | |
342 | struct type *range = elttype; | |
343 | LONGEST low_bound, high_bound; | |
373a8247 PM |
344 | int need_comma = 0; |
345 | ||
6b1755ce | 346 | fputs_filtered ("[", stream); |
373a8247 | 347 | |
b926417a | 348 | int bound_info = get_discrete_bounds (range, &low_bound, &high_bound); |
7a081a30 PM |
349 | if (low_bound == 0 && high_bound == -1 && TYPE_LENGTH (type) > 0) |
350 | { | |
351 | /* If we know the size of the set type, we can figure out the | |
352 | maximum value. */ | |
b926417a | 353 | bound_info = 0; |
7a081a30 PM |
354 | high_bound = TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1; |
355 | TYPE_HIGH_BOUND (range) = high_bound; | |
356 | } | |
373a8247 | 357 | maybe_bad_bstring: |
b926417a | 358 | if (bound_info < 0) |
373a8247 | 359 | { |
7f6aba03 | 360 | fputs_styled ("<error value>", metadata_style.style (), stream); |
373a8247 PM |
361 | goto done; |
362 | } | |
363 | ||
364 | for (i = low_bound; i <= high_bound; i++) | |
365 | { | |
426a9c18 | 366 | int element = value_bit_index (type, valaddr, i); |
ad3bbd48 | 367 | |
373a8247 PM |
368 | if (element < 0) |
369 | { | |
370 | i = element; | |
371 | goto maybe_bad_bstring; | |
372 | } | |
6b1755ce | 373 | if (element) |
373a8247 PM |
374 | { |
375 | if (need_comma) | |
376 | fputs_filtered (", ", stream); | |
377 | print_type_scalar (range, i, stream); | |
378 | need_comma = 1; | |
379 | ||
3e43a32a | 380 | if (i + 1 <= high_bound |
426a9c18 | 381 | && value_bit_index (type, valaddr, ++i)) |
373a8247 PM |
382 | { |
383 | int j = i; | |
ad3bbd48 | 384 | |
373a8247 PM |
385 | fputs_filtered ("..", stream); |
386 | while (i + 1 <= high_bound | |
426a9c18 | 387 | && value_bit_index (type, valaddr, ++i)) |
373a8247 PM |
388 | j = i; |
389 | print_type_scalar (range, j, stream); | |
390 | } | |
391 | } | |
392 | } | |
393 | done: | |
6b1755ce | 394 | fputs_filtered ("]", stream); |
373a8247 PM |
395 | } |
396 | break; | |
397 | ||
373a8247 | 398 | default: |
3e43a32a MS |
399 | error (_("Invalid pascal type code %d in symbol table."), |
400 | TYPE_CODE (type)); | |
373a8247 | 401 | } |
373a8247 | 402 | } |
c0941be6 | 403 | |
426a9c18 | 404 | \f |
c0941be6 | 405 | void |
426a9c18 TT |
406 | pascal_value_print (struct value *val, struct ui_file *stream, |
407 | const struct value_print_options *options) | |
c0941be6 | 408 | { |
426a9c18 TT |
409 | struct type *type = value_type (val); |
410 | struct value_print_options opts = *options; | |
64d64d3a | 411 | |
426a9c18 | 412 | opts.deref_ref = 1; |
64d64d3a | 413 | |
426a9c18 | 414 | /* If it is a pointer, indicate what it points to. |
64d64d3a | 415 | |
426a9c18 | 416 | Print type also if it is a reference. |
64d64d3a | 417 | |
426a9c18 TT |
418 | Object pascal: if it is a member pointer, we will take care |
419 | of that when we print it. */ | |
420 | if (TYPE_CODE (type) == TYPE_CODE_PTR | |
421 | || TYPE_CODE (type) == TYPE_CODE_REF) | |
422 | { | |
423 | /* Hack: remove (char *) for char strings. Their | |
424 | type is indicated by the quoted string anyway. */ | |
425 | if (TYPE_CODE (type) == TYPE_CODE_PTR | |
426 | && TYPE_NAME (type) == NULL | |
427 | && TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL | |
428 | && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0) | |
64d64d3a | 429 | { |
426a9c18 | 430 | /* Print nothing. */ |
64d64d3a | 431 | } |
426a9c18 | 432 | else |
64d64d3a | 433 | { |
426a9c18 TT |
434 | fprintf_filtered (stream, "("); |
435 | type_print (type, "", stream, -1); | |
436 | fprintf_filtered (stream, ") "); | |
64d64d3a | 437 | } |
426a9c18 TT |
438 | } |
439 | common_val_print (val, stream, 0, &opts, current_language); | |
440 | } | |
64d64d3a | 441 | |
64d64d3a | 442 | |
426a9c18 TT |
443 | static void |
444 | show_pascal_static_field_print (struct ui_file *file, int from_tty, | |
445 | struct cmd_list_element *c, const char *value) | |
446 | { | |
447 | fprintf_filtered (file, _("Printing of pascal static members is %s.\n"), | |
448 | value); | |
449 | } | |
64d64d3a | 450 | |
426a9c18 TT |
451 | static struct obstack dont_print_vb_obstack; |
452 | static struct obstack dont_print_statmem_obstack; | |
64d64d3a | 453 | |
426a9c18 TT |
454 | static void pascal_object_print_static_field (struct value *, |
455 | struct ui_file *, int, | |
456 | const struct value_print_options *); | |
64d64d3a | 457 | |
426a9c18 TT |
458 | static void pascal_object_print_value (struct value *, struct ui_file *, int, |
459 | const struct value_print_options *, | |
460 | struct type **); | |
64d64d3a | 461 | |
426a9c18 TT |
462 | /* It was changed to this after 2.4.5. */ |
463 | const char pascal_vtbl_ptr_name[] = | |
464 | {'_', '_', 'v', 't', 'b', 'l', '_', 'p', 't', 'r', '_', 't', 'y', 'p', 'e', 0}; | |
64d64d3a | 465 | |
426a9c18 TT |
466 | /* Return truth value for assertion that TYPE is of the type |
467 | "pointer to virtual function". */ | |
64d64d3a | 468 | |
426a9c18 TT |
469 | int |
470 | pascal_object_is_vtbl_ptr_type (struct type *type) | |
471 | { | |
472 | const char *type_name = TYPE_NAME (type); | |
373a8247 | 473 | |
fe978cb0 PA |
474 | return (type_name != NULL |
475 | && strcmp (type_name, pascal_vtbl_ptr_name) == 0); | |
373a8247 PM |
476 | } |
477 | ||
478 | /* Return truth value for the assertion that TYPE is of the type | |
479 | "pointer to virtual function table". */ | |
480 | ||
481 | int | |
fba45db2 | 482 | pascal_object_is_vtbl_member (struct type *type) |
373a8247 PM |
483 | { |
484 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
485 | { | |
486 | type = TYPE_TARGET_TYPE (type); | |
487 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
488 | { | |
489 | type = TYPE_TARGET_TYPE (type); | |
0df8b418 MS |
490 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* If not using |
491 | thunks. */ | |
492 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* If using thunks. */ | |
373a8247 PM |
493 | { |
494 | /* Virtual functions tables are full of pointers | |
0df8b418 | 495 | to virtual functions. */ |
373a8247 PM |
496 | return pascal_object_is_vtbl_ptr_type (type); |
497 | } | |
498 | } | |
499 | } | |
500 | return 0; | |
501 | } | |
502 | ||
07a32858 TT |
503 | /* Mutually recursive subroutines of pascal_object_print_value and |
504 | pascal_value_print to print out a structure's fields: | |
505 | pascal_object_print_value_fields and pascal_object_print_value. | |
506 | ||
507 | VAL, STREAM, RECURSE, and OPTIONS have the same meanings as in | |
508 | pascal_object_print_value and c_value_print. | |
509 | ||
510 | DONT_PRINT is an array of baseclass types that we | |
511 | should not print, or zero if called from top level. */ | |
512 | ||
513 | static void | |
514 | pascal_object_print_value_fields (struct value *val, struct ui_file *stream, | |
515 | int recurse, | |
516 | const struct value_print_options *options, | |
517 | struct type **dont_print_vb, | |
518 | int dont_print_statmem) | |
519 | { | |
520 | int i, len, n_baseclasses; | |
521 | char *last_dont_print | |
522 | = (char *) obstack_next_free (&dont_print_statmem_obstack); | |
523 | ||
524 | struct type *type = check_typedef (value_type (val)); | |
525 | ||
526 | fprintf_filtered (stream, "{"); | |
527 | len = TYPE_NFIELDS (type); | |
528 | n_baseclasses = TYPE_N_BASECLASSES (type); | |
529 | ||
530 | /* Print out baseclasses such that we don't print | |
531 | duplicates of virtual baseclasses. */ | |
532 | if (n_baseclasses > 0) | |
533 | pascal_object_print_value (val, stream, recurse + 1, | |
534 | options, dont_print_vb); | |
535 | ||
536 | if (!len && n_baseclasses == 1) | |
537 | fprintf_styled (stream, metadata_style.style (), "<No data fields>"); | |
538 | else | |
539 | { | |
540 | struct obstack tmp_obstack = dont_print_statmem_obstack; | |
541 | int fields_seen = 0; | |
542 | const gdb_byte *valaddr = value_contents_for_printing (val); | |
543 | ||
544 | if (dont_print_statmem == 0) | |
545 | { | |
546 | /* If we're at top level, carve out a completely fresh | |
547 | chunk of the obstack and use that until this particular | |
548 | invocation returns. */ | |
549 | obstack_finish (&dont_print_statmem_obstack); | |
550 | } | |
551 | ||
552 | for (i = n_baseclasses; i < len; i++) | |
553 | { | |
554 | /* If requested, skip printing of static fields. */ | |
555 | if (!options->pascal_static_field_print | |
556 | && field_is_static (&TYPE_FIELD (type, i))) | |
557 | continue; | |
558 | if (fields_seen) | |
559 | fprintf_filtered (stream, ", "); | |
560 | else if (n_baseclasses > 0) | |
561 | { | |
562 | if (options->prettyformat) | |
563 | { | |
564 | fprintf_filtered (stream, "\n"); | |
565 | print_spaces_filtered (2 + 2 * recurse, stream); | |
566 | fputs_filtered ("members of ", stream); | |
567 | fputs_filtered (TYPE_NAME (type), stream); | |
568 | fputs_filtered (": ", stream); | |
569 | } | |
570 | } | |
571 | fields_seen = 1; | |
572 | ||
573 | if (options->prettyformat) | |
574 | { | |
575 | fprintf_filtered (stream, "\n"); | |
576 | print_spaces_filtered (2 + 2 * recurse, stream); | |
577 | } | |
578 | else | |
579 | { | |
580 | wrap_here (n_spaces (2 + 2 * recurse)); | |
581 | } | |
582 | ||
583 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); | |
584 | ||
585 | if (field_is_static (&TYPE_FIELD (type, i))) | |
586 | { | |
587 | fputs_filtered ("static ", stream); | |
588 | fprintf_symbol_filtered (stream, | |
589 | TYPE_FIELD_NAME (type, i), | |
590 | current_language->la_language, | |
591 | DMGL_PARAMS | DMGL_ANSI); | |
592 | } | |
593 | else | |
594 | fputs_styled (TYPE_FIELD_NAME (type, i), | |
595 | variable_name_style.style (), stream); | |
596 | annotate_field_name_end (); | |
597 | fputs_filtered (" = ", stream); | |
598 | annotate_field_value (); | |
599 | ||
600 | if (!field_is_static (&TYPE_FIELD (type, i)) | |
601 | && TYPE_FIELD_PACKED (type, i)) | |
602 | { | |
603 | struct value *v; | |
604 | ||
605 | /* Bitfields require special handling, especially due to byte | |
606 | order problems. */ | |
607 | if (TYPE_FIELD_IGNORE (type, i)) | |
608 | { | |
609 | fputs_styled ("<optimized out or zero length>", | |
610 | metadata_style.style (), stream); | |
611 | } | |
612 | else if (value_bits_synthetic_pointer (val, | |
613 | TYPE_FIELD_BITPOS (type, | |
614 | i), | |
615 | TYPE_FIELD_BITSIZE (type, | |
616 | i))) | |
617 | { | |
618 | fputs_styled (_("<synthetic pointer>"), | |
619 | metadata_style.style (), stream); | |
620 | } | |
621 | else | |
622 | { | |
623 | struct value_print_options opts = *options; | |
624 | ||
625 | v = value_field_bitfield (type, i, valaddr, 0, val); | |
626 | ||
627 | opts.deref_ref = 0; | |
628 | common_val_print (v, stream, recurse + 1, &opts, | |
629 | current_language); | |
630 | } | |
631 | } | |
632 | else | |
633 | { | |
634 | if (TYPE_FIELD_IGNORE (type, i)) | |
635 | { | |
636 | fputs_styled ("<optimized out or zero length>", | |
637 | metadata_style.style (), stream); | |
638 | } | |
639 | else if (field_is_static (&TYPE_FIELD (type, i))) | |
640 | { | |
641 | /* struct value *v = value_static_field (type, i); | |
642 | v4.17 specific. */ | |
643 | struct value *v; | |
644 | ||
645 | v = value_field_bitfield (type, i, valaddr, 0, val); | |
646 | ||
647 | if (v == NULL) | |
648 | val_print_optimized_out (NULL, stream); | |
649 | else | |
650 | pascal_object_print_static_field (v, stream, recurse + 1, | |
651 | options); | |
652 | } | |
653 | else | |
654 | { | |
655 | struct value_print_options opts = *options; | |
656 | ||
657 | opts.deref_ref = 0; | |
658 | ||
659 | struct value *v = value_primitive_field (val, 0, i, | |
660 | value_type (val)); | |
661 | common_val_print (v, stream, recurse + 1, &opts, | |
662 | current_language); | |
663 | } | |
664 | } | |
665 | annotate_field_end (); | |
666 | } | |
667 | ||
668 | if (dont_print_statmem == 0) | |
669 | { | |
670 | /* Free the space used to deal with the printing | |
671 | of the members from top level. */ | |
672 | obstack_free (&dont_print_statmem_obstack, last_dont_print); | |
673 | dont_print_statmem_obstack = tmp_obstack; | |
674 | } | |
675 | ||
676 | if (options->prettyformat) | |
677 | { | |
678 | fprintf_filtered (stream, "\n"); | |
679 | print_spaces_filtered (2 * recurse, stream); | |
680 | } | |
681 | } | |
682 | fprintf_filtered (stream, "}"); | |
683 | } | |
684 | ||
07a32858 TT |
685 | /* Special val_print routine to avoid printing multiple copies of virtual |
686 | baseclasses. */ | |
687 | ||
688 | static void | |
689 | pascal_object_print_value (struct value *val, struct ui_file *stream, | |
690 | int recurse, | |
691 | const struct value_print_options *options, | |
692 | struct type **dont_print_vb) | |
693 | { | |
694 | struct type **last_dont_print | |
695 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); | |
696 | struct obstack tmp_obstack = dont_print_vb_obstack; | |
697 | struct type *type = check_typedef (value_type (val)); | |
698 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); | |
699 | ||
700 | if (dont_print_vb == 0) | |
701 | { | |
702 | /* If we're at top level, carve out a completely fresh | |
703 | chunk of the obstack and use that until this particular | |
704 | invocation returns. */ | |
705 | /* Bump up the high-water mark. Now alpha is omega. */ | |
706 | obstack_finish (&dont_print_vb_obstack); | |
707 | } | |
708 | ||
709 | for (i = 0; i < n_baseclasses; i++) | |
710 | { | |
711 | LONGEST boffset = 0; | |
712 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); | |
713 | const char *basename = TYPE_NAME (baseclass); | |
714 | int skip = 0; | |
715 | ||
716 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
717 | { | |
718 | struct type **first_dont_print | |
719 | = (struct type **) obstack_base (&dont_print_vb_obstack); | |
720 | ||
721 | int j = (struct type **) obstack_next_free (&dont_print_vb_obstack) | |
722 | - first_dont_print; | |
723 | ||
724 | while (--j >= 0) | |
725 | if (baseclass == first_dont_print[j]) | |
726 | goto flush_it; | |
727 | ||
728 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); | |
729 | } | |
730 | ||
731 | struct value *base_value; | |
732 | try | |
733 | { | |
734 | base_value = value_primitive_field (val, 0, i, type); | |
735 | } | |
736 | catch (const gdb_exception_error &ex) | |
737 | { | |
771dd3a8 | 738 | base_value = nullptr; |
07a32858 TT |
739 | if (ex.error == NOT_AVAILABLE_ERROR) |
740 | skip = -1; | |
741 | else | |
742 | skip = 1; | |
743 | } | |
744 | ||
745 | if (skip == 0) | |
746 | { | |
747 | /* The virtual base class pointer might have been clobbered by the | |
748 | user program. Make sure that it still points to a valid memory | |
749 | location. */ | |
750 | ||
751 | if (boffset < 0 || boffset >= TYPE_LENGTH (type)) | |
752 | { | |
753 | CORE_ADDR address= value_address (val); | |
754 | gdb::byte_vector buf (TYPE_LENGTH (baseclass)); | |
755 | ||
756 | if (target_read_memory (address + boffset, buf.data (), | |
757 | TYPE_LENGTH (baseclass)) != 0) | |
758 | skip = 1; | |
759 | base_value = value_from_contents_and_address (baseclass, | |
760 | buf.data (), | |
761 | address + boffset); | |
762 | baseclass = value_type (base_value); | |
763 | boffset = 0; | |
764 | } | |
765 | } | |
766 | ||
767 | if (options->prettyformat) | |
768 | { | |
769 | fprintf_filtered (stream, "\n"); | |
770 | print_spaces_filtered (2 * recurse, stream); | |
771 | } | |
772 | fputs_filtered ("<", stream); | |
773 | /* Not sure what the best notation is in the case where there is no | |
774 | baseclass name. */ | |
775 | ||
776 | fputs_filtered (basename ? basename : "", stream); | |
777 | fputs_filtered ("> = ", stream); | |
778 | ||
779 | if (skip < 0) | |
780 | val_print_unavailable (stream); | |
781 | else if (skip > 0) | |
782 | val_print_invalid_address (stream); | |
783 | else | |
784 | pascal_object_print_value_fields | |
785 | (base_value, stream, recurse, options, | |
786 | (struct type **) obstack_base (&dont_print_vb_obstack), | |
787 | 0); | |
788 | fputs_filtered (", ", stream); | |
789 | ||
790 | flush_it: | |
791 | ; | |
792 | } | |
793 | ||
794 | if (dont_print_vb == 0) | |
795 | { | |
796 | /* Free the space used to deal with the printing | |
797 | of this type from top level. */ | |
798 | obstack_free (&dont_print_vb_obstack, last_dont_print); | |
799 | /* Reset watermark so that we can continue protecting | |
800 | ourselves from whatever we were protecting ourselves. */ | |
801 | dont_print_vb_obstack = tmp_obstack; | |
802 | } | |
803 | } | |
804 | ||
373a8247 PM |
805 | /* Print value of a static member. |
806 | To avoid infinite recursion when printing a class that contains | |
807 | a static instance of the class, we keep the addresses of all printed | |
808 | static member classes in an obstack and refuse to print them more | |
809 | than once. | |
810 | ||
79a45b7d | 811 | VAL contains the value to print, STREAM, RECURSE, and OPTIONS |
373a8247 PM |
812 | have the same meanings as in c_val_print. */ |
813 | ||
814 | static void | |
806048c6 | 815 | pascal_object_print_static_field (struct value *val, |
79a45b7d TT |
816 | struct ui_file *stream, |
817 | int recurse, | |
818 | const struct value_print_options *options) | |
373a8247 | 819 | { |
806048c6 | 820 | struct type *type = value_type (val); |
79a45b7d | 821 | struct value_print_options opts; |
806048c6 | 822 | |
686d4def PA |
823 | if (value_entirely_optimized_out (val)) |
824 | { | |
825 | val_print_optimized_out (val, stream); | |
826 | return; | |
827 | } | |
828 | ||
373a8247 PM |
829 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
830 | { | |
42ae5230 | 831 | CORE_ADDR *first_dont_print, addr; |
373a8247 PM |
832 | int i; |
833 | ||
834 | first_dont_print | |
835 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); | |
836 | i = (CORE_ADDR *) obstack_next_free (&dont_print_statmem_obstack) | |
837 | - first_dont_print; | |
838 | ||
839 | while (--i >= 0) | |
840 | { | |
42ae5230 | 841 | if (value_address (val) == first_dont_print[i]) |
373a8247 | 842 | { |
2dbc041e TT |
843 | fputs_styled (_("\ |
844 | <same as static member of an already seen type>"), | |
845 | metadata_style.style (), stream); | |
373a8247 PM |
846 | return; |
847 | } | |
848 | } | |
849 | ||
42ae5230 TT |
850 | addr = value_address (val); |
851 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, | |
373a8247 PM |
852 | sizeof (CORE_ADDR)); |
853 | ||
f168693b | 854 | type = check_typedef (type); |
426a9c18 TT |
855 | pascal_object_print_value_fields (val, stream, recurse, |
856 | options, NULL, 1); | |
373a8247 PM |
857 | return; |
858 | } | |
79a45b7d TT |
859 | |
860 | opts = *options; | |
861 | opts.deref_ref = 0; | |
862 | common_val_print (val, stream, recurse, &opts, current_language); | |
373a8247 PM |
863 | } |
864 | ||
6c265988 | 865 | void _initialize_pascal_valprint (); |
373a8247 | 866 | void |
6c265988 | 867 | _initialize_pascal_valprint () |
373a8247 | 868 | { |
5bf193a2 | 869 | add_setshow_boolean_cmd ("pascal_static-members", class_support, |
79a45b7d | 870 | &user_print_options.pascal_static_field_print, _("\ |
5bf193a2 AC |
871 | Set printing of pascal static members."), _("\ |
872 | Show printing of pascal static members."), NULL, | |
873 | NULL, | |
920d2a44 | 874 | show_pascal_static_field_print, |
5bf193a2 | 875 | &setprintlist, &showprintlist); |
373a8247 | 876 | } |