| 1 | /* Support for printing Pascal values for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2000-2018 Free Software Foundation, Inc. |
| 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 |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 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 |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* This file is derived from c-valprint.c */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "gdb_obstack.h" |
| 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" |
| 33 | #include "typeprint.h" |
| 34 | #include "language.h" |
| 35 | #include "target.h" |
| 36 | #include "annotate.h" |
| 37 | #include "p-lang.h" |
| 38 | #include "cp-abi.h" |
| 39 | #include "cp-support.h" |
| 40 | #include "objfiles.h" |
| 41 | #include "common/byte-vector.h" |
| 42 | \f |
| 43 | |
| 44 | /* Decorations for Pascal. */ |
| 45 | |
| 46 | static const struct generic_val_print_decorations p_decorations = |
| 47 | { |
| 48 | "", |
| 49 | " + ", |
| 50 | " * I", |
| 51 | "true", |
| 52 | "false", |
| 53 | "void", |
| 54 | "{", |
| 55 | "}" |
| 56 | }; |
| 57 | |
| 58 | /* See val_print for a description of the various parameters of this |
| 59 | function; they are identical. */ |
| 60 | |
| 61 | void |
| 62 | pascal_val_print (struct type *type, |
| 63 | int embedded_offset, CORE_ADDR address, |
| 64 | struct ui_file *stream, int recurse, |
| 65 | struct value *original_value, |
| 66 | const struct value_print_options *options) |
| 67 | { |
| 68 | struct gdbarch *gdbarch = get_type_arch (type); |
| 69 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 70 | unsigned int i = 0; /* Number of characters printed */ |
| 71 | unsigned len; |
| 72 | LONGEST low_bound, high_bound; |
| 73 | struct type *elttype; |
| 74 | unsigned eltlen; |
| 75 | int length_pos, length_size, string_pos; |
| 76 | struct type *char_type; |
| 77 | CORE_ADDR addr; |
| 78 | int want_space = 0; |
| 79 | const gdb_byte *valaddr = value_contents_for_printing (original_value); |
| 80 | |
| 81 | type = check_typedef (type); |
| 82 | switch (TYPE_CODE (type)) |
| 83 | { |
| 84 | case TYPE_CODE_ARRAY: |
| 85 | if (get_array_bounds (type, &low_bound, &high_bound)) |
| 86 | { |
| 87 | len = high_bound - low_bound + 1; |
| 88 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 89 | eltlen = TYPE_LENGTH (elttype); |
| 90 | if (options->prettyformat_arrays) |
| 91 | { |
| 92 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 93 | } |
| 94 | /* If 's' format is used, try to print out as string. |
| 95 | If no format is given, print as string if element type |
| 96 | is of TYPE_CODE_CHAR and element size is 1,2 or 4. */ |
| 97 | if (options->format == 's' |
| 98 | || ((eltlen == 1 || eltlen == 2 || eltlen == 4) |
| 99 | && TYPE_CODE (elttype) == TYPE_CODE_CHAR |
| 100 | && options->format == 0)) |
| 101 | { |
| 102 | /* If requested, look for the first null char and only print |
| 103 | elements up to it. */ |
| 104 | if (options->stop_print_at_null) |
| 105 | { |
| 106 | unsigned int temp_len; |
| 107 | |
| 108 | /* Look for a NULL char. */ |
| 109 | for (temp_len = 0; |
| 110 | extract_unsigned_integer (valaddr + embedded_offset + |
| 111 | temp_len * eltlen, eltlen, |
| 112 | byte_order) |
| 113 | && temp_len < len && temp_len < options->print_max; |
| 114 | temp_len++); |
| 115 | len = temp_len; |
| 116 | } |
| 117 | |
| 118 | LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type), |
| 119 | valaddr + embedded_offset, len, NULL, 0, |
| 120 | options); |
| 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 | } |
| 137 | val_print_array_elements (type, embedded_offset, |
| 138 | address, stream, recurse, |
| 139 | original_value, options, i); |
| 140 | fprintf_filtered (stream, "}"); |
| 141 | } |
| 142 | break; |
| 143 | } |
| 144 | /* Array of unspecified length: treat like pointer to first elt. */ |
| 145 | addr = address + embedded_offset; |
| 146 | goto print_unpacked_pointer; |
| 147 | |
| 148 | case TYPE_CODE_PTR: |
| 149 | if (options->format && options->format != 's') |
| 150 | { |
| 151 | val_print_scalar_formatted (type, embedded_offset, |
| 152 | original_value, options, 0, stream); |
| 153 | break; |
| 154 | } |
| 155 | if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
| 156 | { |
| 157 | /* Print the unmangled name if desired. */ |
| 158 | /* Print vtable entry - we only get here if we ARE using |
| 159 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */ |
| 160 | /* Extract the address, assume that it is unsigned. */ |
| 161 | addr = extract_unsigned_integer (valaddr + embedded_offset, |
| 162 | TYPE_LENGTH (type), byte_order); |
| 163 | print_address_demangle (options, gdbarch, addr, stream, demangle); |
| 164 | break; |
| 165 | } |
| 166 | check_typedef (TYPE_TARGET_TYPE (type)); |
| 167 | |
| 168 | addr = unpack_pointer (type, valaddr + embedded_offset); |
| 169 | print_unpacked_pointer: |
| 170 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 171 | |
| 172 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) |
| 173 | { |
| 174 | /* Try to print what function it points to. */ |
| 175 | print_address_demangle (options, gdbarch, addr, stream, demangle); |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | if (options->addressprint && options->format != 's') |
| 180 | { |
| 181 | fputs_filtered (paddress (gdbarch, addr), stream); |
| 182 | want_space = 1; |
| 183 | } |
| 184 | |
| 185 | /* For a pointer to char or unsigned char, also print the string |
| 186 | pointed to, unless pointer is null. */ |
| 187 | if (((TYPE_LENGTH (elttype) == 1 |
| 188 | && (TYPE_CODE (elttype) == TYPE_CODE_INT |
| 189 | || TYPE_CODE (elttype) == TYPE_CODE_CHAR)) |
| 190 | || ((TYPE_LENGTH (elttype) == 2 || TYPE_LENGTH (elttype) == 4) |
| 191 | && TYPE_CODE (elttype) == TYPE_CODE_CHAR)) |
| 192 | && (options->format == 0 || options->format == 's') |
| 193 | && addr != 0) |
| 194 | { |
| 195 | if (want_space) |
| 196 | fputs_filtered (" ", stream); |
| 197 | /* No wide string yet. */ |
| 198 | i = val_print_string (elttype, NULL, addr, -1, stream, options); |
| 199 | } |
| 200 | /* Also for pointers to pascal strings. */ |
| 201 | /* Note: this is Free Pascal specific: |
| 202 | as GDB does not recognize stabs pascal strings |
| 203 | Pascal strings are mapped to records |
| 204 | with lowercase names PM. */ |
| 205 | if (is_pascal_string_type (elttype, &length_pos, &length_size, |
| 206 | &string_pos, &char_type, NULL) |
| 207 | && addr != 0) |
| 208 | { |
| 209 | ULONGEST string_length; |
| 210 | gdb_byte *buffer; |
| 211 | |
| 212 | if (want_space) |
| 213 | fputs_filtered (" ", stream); |
| 214 | buffer = (gdb_byte *) xmalloc (length_size); |
| 215 | read_memory (addr + length_pos, buffer, length_size); |
| 216 | string_length = extract_unsigned_integer (buffer, length_size, |
| 217 | byte_order); |
| 218 | xfree (buffer); |
| 219 | i = val_print_string (char_type, NULL, |
| 220 | addr + string_pos, string_length, |
| 221 | stream, options); |
| 222 | } |
| 223 | else if (pascal_object_is_vtbl_member (type)) |
| 224 | { |
| 225 | /* Print vtbl's nicely. */ |
| 226 | CORE_ADDR vt_address = unpack_pointer (type, |
| 227 | valaddr + embedded_offset); |
| 228 | struct bound_minimal_symbol msymbol = |
| 229 | lookup_minimal_symbol_by_pc (vt_address); |
| 230 | |
| 231 | /* If 'symbol_print' is set, we did the work above. */ |
| 232 | if (!options->symbol_print |
| 233 | && (msymbol.minsym != NULL) |
| 234 | && (vt_address == BMSYMBOL_VALUE_ADDRESS (msymbol))) |
| 235 | { |
| 236 | if (want_space) |
| 237 | fputs_filtered (" ", stream); |
| 238 | fputs_filtered ("<", stream); |
| 239 | fputs_filtered (MSYMBOL_PRINT_NAME (msymbol.minsym), stream); |
| 240 | fputs_filtered (">", stream); |
| 241 | want_space = 1; |
| 242 | } |
| 243 | if (vt_address && options->vtblprint) |
| 244 | { |
| 245 | struct value *vt_val; |
| 246 | struct symbol *wsym = NULL; |
| 247 | struct type *wtype; |
| 248 | struct block *block = NULL; |
| 249 | struct field_of_this_result is_this_fld; |
| 250 | |
| 251 | if (want_space) |
| 252 | fputs_filtered (" ", stream); |
| 253 | |
| 254 | if (msymbol.minsym != NULL) |
| 255 | wsym = lookup_symbol (MSYMBOL_LINKAGE_NAME (msymbol.minsym), |
| 256 | block, |
| 257 | VAR_DOMAIN, &is_this_fld).symbol; |
| 258 | |
| 259 | if (wsym) |
| 260 | { |
| 261 | wtype = SYMBOL_TYPE (wsym); |
| 262 | } |
| 263 | else |
| 264 | { |
| 265 | wtype = TYPE_TARGET_TYPE (type); |
| 266 | } |
| 267 | vt_val = value_at (wtype, vt_address); |
| 268 | common_val_print (vt_val, stream, recurse + 1, options, |
| 269 | current_language); |
| 270 | if (options->prettyformat) |
| 271 | { |
| 272 | fprintf_filtered (stream, "\n"); |
| 273 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | return; |
| 279 | |
| 280 | case TYPE_CODE_REF: |
| 281 | case TYPE_CODE_ENUM: |
| 282 | case TYPE_CODE_FLAGS: |
| 283 | case TYPE_CODE_FUNC: |
| 284 | case TYPE_CODE_RANGE: |
| 285 | case TYPE_CODE_INT: |
| 286 | case TYPE_CODE_FLT: |
| 287 | case TYPE_CODE_VOID: |
| 288 | case TYPE_CODE_ERROR: |
| 289 | case TYPE_CODE_UNDEF: |
| 290 | case TYPE_CODE_BOOL: |
| 291 | case TYPE_CODE_CHAR: |
| 292 | generic_val_print (type, embedded_offset, address, |
| 293 | stream, recurse, original_value, options, |
| 294 | &p_decorations); |
| 295 | break; |
| 296 | |
| 297 | case TYPE_CODE_UNION: |
| 298 | if (recurse && !options->unionprint) |
| 299 | { |
| 300 | fprintf_filtered (stream, "{...}"); |
| 301 | break; |
| 302 | } |
| 303 | /* Fall through. */ |
| 304 | case TYPE_CODE_STRUCT: |
| 305 | if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
| 306 | { |
| 307 | /* Print the unmangled name if desired. */ |
| 308 | /* Print vtable entry - we only get here if NOT using |
| 309 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */ |
| 310 | /* Extract the address, assume that it is unsigned. */ |
| 311 | print_address_demangle |
| 312 | (options, gdbarch, |
| 313 | extract_unsigned_integer (valaddr + embedded_offset |
| 314 | + TYPE_FIELD_BITPOS (type, |
| 315 | VTBL_FNADDR_OFFSET) / 8, |
| 316 | TYPE_LENGTH (TYPE_FIELD_TYPE (type, |
| 317 | VTBL_FNADDR_OFFSET)), |
| 318 | byte_order), |
| 319 | stream, demangle); |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | if (is_pascal_string_type (type, &length_pos, &length_size, |
| 324 | &string_pos, &char_type, NULL)) |
| 325 | { |
| 326 | len = extract_unsigned_integer (valaddr + embedded_offset |
| 327 | + length_pos, length_size, |
| 328 | byte_order); |
| 329 | LA_PRINT_STRING (stream, char_type, |
| 330 | valaddr + embedded_offset + string_pos, |
| 331 | len, NULL, 0, options); |
| 332 | } |
| 333 | else |
| 334 | pascal_object_print_value_fields (type, valaddr, embedded_offset, |
| 335 | address, stream, recurse, |
| 336 | original_value, options, |
| 337 | NULL, 0); |
| 338 | } |
| 339 | break; |
| 340 | |
| 341 | case TYPE_CODE_SET: |
| 342 | elttype = TYPE_INDEX_TYPE (type); |
| 343 | elttype = check_typedef (elttype); |
| 344 | if (TYPE_STUB (elttype)) |
| 345 | { |
| 346 | fprintf_filtered (stream, "<incomplete type>"); |
| 347 | gdb_flush (stream); |
| 348 | break; |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | struct type *range = elttype; |
| 353 | LONGEST low_bound, high_bound; |
| 354 | int i; |
| 355 | int need_comma = 0; |
| 356 | |
| 357 | fputs_filtered ("[", stream); |
| 358 | |
| 359 | i = get_discrete_bounds (range, &low_bound, &high_bound); |
| 360 | if (low_bound == 0 && high_bound == -1 && TYPE_LENGTH (type) > 0) |
| 361 | { |
| 362 | /* If we know the size of the set type, we can figure out the |
| 363 | maximum value. */ |
| 364 | i = 0; |
| 365 | high_bound = TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1; |
| 366 | TYPE_HIGH_BOUND (range) = high_bound; |
| 367 | } |
| 368 | maybe_bad_bstring: |
| 369 | if (i < 0) |
| 370 | { |
| 371 | fputs_filtered ("<error value>", stream); |
| 372 | goto done; |
| 373 | } |
| 374 | |
| 375 | for (i = low_bound; i <= high_bound; i++) |
| 376 | { |
| 377 | int element = value_bit_index (type, |
| 378 | valaddr + embedded_offset, i); |
| 379 | |
| 380 | if (element < 0) |
| 381 | { |
| 382 | i = element; |
| 383 | goto maybe_bad_bstring; |
| 384 | } |
| 385 | if (element) |
| 386 | { |
| 387 | if (need_comma) |
| 388 | fputs_filtered (", ", stream); |
| 389 | print_type_scalar (range, i, stream); |
| 390 | need_comma = 1; |
| 391 | |
| 392 | if (i + 1 <= high_bound |
| 393 | && value_bit_index (type, |
| 394 | valaddr + embedded_offset, ++i)) |
| 395 | { |
| 396 | int j = i; |
| 397 | |
| 398 | fputs_filtered ("..", stream); |
| 399 | while (i + 1 <= high_bound |
| 400 | && value_bit_index (type, |
| 401 | valaddr + embedded_offset, |
| 402 | ++i)) |
| 403 | j = i; |
| 404 | print_type_scalar (range, j, stream); |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | done: |
| 409 | fputs_filtered ("]", stream); |
| 410 | } |
| 411 | break; |
| 412 | |
| 413 | default: |
| 414 | error (_("Invalid pascal type code %d in symbol table."), |
| 415 | TYPE_CODE (type)); |
| 416 | } |
| 417 | gdb_flush (stream); |
| 418 | } |
| 419 | \f |
| 420 | void |
| 421 | pascal_value_print (struct value *val, struct ui_file *stream, |
| 422 | const struct value_print_options *options) |
| 423 | { |
| 424 | struct type *type = value_type (val); |
| 425 | struct value_print_options opts = *options; |
| 426 | |
| 427 | opts.deref_ref = 1; |
| 428 | |
| 429 | /* If it is a pointer, indicate what it points to. |
| 430 | |
| 431 | Print type also if it is a reference. |
| 432 | |
| 433 | Object pascal: if it is a member pointer, we will take care |
| 434 | of that when we print it. */ |
| 435 | if (TYPE_CODE (type) == TYPE_CODE_PTR |
| 436 | || TYPE_CODE (type) == TYPE_CODE_REF) |
| 437 | { |
| 438 | /* Hack: remove (char *) for char strings. Their |
| 439 | type is indicated by the quoted string anyway. */ |
| 440 | if (TYPE_CODE (type) == TYPE_CODE_PTR |
| 441 | && TYPE_NAME (type) == NULL |
| 442 | && TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL |
| 443 | && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0) |
| 444 | { |
| 445 | /* Print nothing. */ |
| 446 | } |
| 447 | else |
| 448 | { |
| 449 | fprintf_filtered (stream, "("); |
| 450 | type_print (type, "", stream, -1); |
| 451 | fprintf_filtered (stream, ") "); |
| 452 | } |
| 453 | } |
| 454 | common_val_print (val, stream, 0, &opts, current_language); |
| 455 | } |
| 456 | |
| 457 | |
| 458 | static void |
| 459 | show_pascal_static_field_print (struct ui_file *file, int from_tty, |
| 460 | struct cmd_list_element *c, const char *value) |
| 461 | { |
| 462 | fprintf_filtered (file, _("Printing of pascal static members is %s.\n"), |
| 463 | value); |
| 464 | } |
| 465 | |
| 466 | static struct obstack dont_print_vb_obstack; |
| 467 | static struct obstack dont_print_statmem_obstack; |
| 468 | |
| 469 | static void pascal_object_print_static_field (struct value *, |
| 470 | struct ui_file *, int, |
| 471 | const struct value_print_options *); |
| 472 | |
| 473 | static void pascal_object_print_value (struct type *, const gdb_byte *, |
| 474 | LONGEST, |
| 475 | CORE_ADDR, struct ui_file *, int, |
| 476 | struct value *, |
| 477 | const struct value_print_options *, |
| 478 | struct type **); |
| 479 | |
| 480 | /* It was changed to this after 2.4.5. */ |
| 481 | const char pascal_vtbl_ptr_name[] = |
| 482 | {'_', '_', 'v', 't', 'b', 'l', '_', 'p', 't', 'r', '_', 't', 'y', 'p', 'e', 0}; |
| 483 | |
| 484 | /* Return truth value for assertion that TYPE is of the type |
| 485 | "pointer to virtual function". */ |
| 486 | |
| 487 | int |
| 488 | pascal_object_is_vtbl_ptr_type (struct type *type) |
| 489 | { |
| 490 | const char *type_name = type_name_no_tag (type); |
| 491 | |
| 492 | return (type_name != NULL |
| 493 | && strcmp (type_name, pascal_vtbl_ptr_name) == 0); |
| 494 | } |
| 495 | |
| 496 | /* Return truth value for the assertion that TYPE is of the type |
| 497 | "pointer to virtual function table". */ |
| 498 | |
| 499 | int |
| 500 | pascal_object_is_vtbl_member (struct type *type) |
| 501 | { |
| 502 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
| 503 | { |
| 504 | type = TYPE_TARGET_TYPE (type); |
| 505 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 506 | { |
| 507 | type = TYPE_TARGET_TYPE (type); |
| 508 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* If not using |
| 509 | thunks. */ |
| 510 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* If using thunks. */ |
| 511 | { |
| 512 | /* Virtual functions tables are full of pointers |
| 513 | to virtual functions. */ |
| 514 | return pascal_object_is_vtbl_ptr_type (type); |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | /* Mutually recursive subroutines of pascal_object_print_value and |
| 522 | c_val_print to print out a structure's fields: |
| 523 | pascal_object_print_value_fields and pascal_object_print_value. |
| 524 | |
| 525 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the |
| 526 | same meanings as in pascal_object_print_value and c_val_print. |
| 527 | |
| 528 | DONT_PRINT is an array of baseclass types that we |
| 529 | should not print, or zero if called from top level. */ |
| 530 | |
| 531 | void |
| 532 | pascal_object_print_value_fields (struct type *type, const gdb_byte *valaddr, |
| 533 | LONGEST offset, |
| 534 | CORE_ADDR address, struct ui_file *stream, |
| 535 | int recurse, |
| 536 | struct value *val, |
| 537 | const struct value_print_options *options, |
| 538 | struct type **dont_print_vb, |
| 539 | int dont_print_statmem) |
| 540 | { |
| 541 | int i, len, n_baseclasses; |
| 542 | char *last_dont_print |
| 543 | = (char *) obstack_next_free (&dont_print_statmem_obstack); |
| 544 | |
| 545 | type = check_typedef (type); |
| 546 | |
| 547 | fprintf_filtered (stream, "{"); |
| 548 | len = TYPE_NFIELDS (type); |
| 549 | n_baseclasses = TYPE_N_BASECLASSES (type); |
| 550 | |
| 551 | /* Print out baseclasses such that we don't print |
| 552 | duplicates of virtual baseclasses. */ |
| 553 | if (n_baseclasses > 0) |
| 554 | pascal_object_print_value (type, valaddr, offset, address, |
| 555 | stream, recurse + 1, val, |
| 556 | options, dont_print_vb); |
| 557 | |
| 558 | if (!len && n_baseclasses == 1) |
| 559 | fprintf_filtered (stream, "<No data fields>"); |
| 560 | else |
| 561 | { |
| 562 | struct obstack tmp_obstack = dont_print_statmem_obstack; |
| 563 | int fields_seen = 0; |
| 564 | |
| 565 | if (dont_print_statmem == 0) |
| 566 | { |
| 567 | /* If we're at top level, carve out a completely fresh |
| 568 | chunk of the obstack and use that until this particular |
| 569 | invocation returns. */ |
| 570 | obstack_finish (&dont_print_statmem_obstack); |
| 571 | } |
| 572 | |
| 573 | for (i = n_baseclasses; i < len; i++) |
| 574 | { |
| 575 | /* If requested, skip printing of static fields. */ |
| 576 | if (!options->pascal_static_field_print |
| 577 | && field_is_static (&TYPE_FIELD (type, i))) |
| 578 | continue; |
| 579 | if (fields_seen) |
| 580 | fprintf_filtered (stream, ", "); |
| 581 | else if (n_baseclasses > 0) |
| 582 | { |
| 583 | if (options->prettyformat) |
| 584 | { |
| 585 | fprintf_filtered (stream, "\n"); |
| 586 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 587 | fputs_filtered ("members of ", stream); |
| 588 | fputs_filtered (type_name_no_tag (type), stream); |
| 589 | fputs_filtered (": ", stream); |
| 590 | } |
| 591 | } |
| 592 | fields_seen = 1; |
| 593 | |
| 594 | if (options->prettyformat) |
| 595 | { |
| 596 | fprintf_filtered (stream, "\n"); |
| 597 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 598 | } |
| 599 | else |
| 600 | { |
| 601 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 602 | } |
| 603 | |
| 604 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); |
| 605 | |
| 606 | if (field_is_static (&TYPE_FIELD (type, i))) |
| 607 | fputs_filtered ("static ", stream); |
| 608 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 609 | language_cplus, |
| 610 | DMGL_PARAMS | DMGL_ANSI); |
| 611 | annotate_field_name_end (); |
| 612 | fputs_filtered (" = ", stream); |
| 613 | annotate_field_value (); |
| 614 | |
| 615 | if (!field_is_static (&TYPE_FIELD (type, i)) |
| 616 | && TYPE_FIELD_PACKED (type, i)) |
| 617 | { |
| 618 | struct value *v; |
| 619 | |
| 620 | /* Bitfields require special handling, especially due to byte |
| 621 | order problems. */ |
| 622 | if (TYPE_FIELD_IGNORE (type, i)) |
| 623 | { |
| 624 | fputs_filtered ("<optimized out or zero length>", stream); |
| 625 | } |
| 626 | else if (value_bits_synthetic_pointer (val, |
| 627 | TYPE_FIELD_BITPOS (type, |
| 628 | i), |
| 629 | TYPE_FIELD_BITSIZE (type, |
| 630 | i))) |
| 631 | { |
| 632 | fputs_filtered (_("<synthetic pointer>"), stream); |
| 633 | } |
| 634 | else |
| 635 | { |
| 636 | struct value_print_options opts = *options; |
| 637 | |
| 638 | v = value_field_bitfield (type, i, valaddr, offset, val); |
| 639 | |
| 640 | opts.deref_ref = 0; |
| 641 | common_val_print (v, stream, recurse + 1, &opts, |
| 642 | current_language); |
| 643 | } |
| 644 | } |
| 645 | else |
| 646 | { |
| 647 | if (TYPE_FIELD_IGNORE (type, i)) |
| 648 | { |
| 649 | fputs_filtered ("<optimized out or zero length>", stream); |
| 650 | } |
| 651 | else if (field_is_static (&TYPE_FIELD (type, i))) |
| 652 | { |
| 653 | /* struct value *v = value_static_field (type, i); |
| 654 | v4.17 specific. */ |
| 655 | struct value *v; |
| 656 | |
| 657 | v = value_field_bitfield (type, i, valaddr, offset, val); |
| 658 | |
| 659 | if (v == NULL) |
| 660 | val_print_optimized_out (NULL, stream); |
| 661 | else |
| 662 | pascal_object_print_static_field (v, stream, recurse + 1, |
| 663 | options); |
| 664 | } |
| 665 | else |
| 666 | { |
| 667 | struct value_print_options opts = *options; |
| 668 | |
| 669 | opts.deref_ref = 0; |
| 670 | /* val_print (TYPE_FIELD_TYPE (type, i), |
| 671 | valaddr + TYPE_FIELD_BITPOS (type, i) / 8, |
| 672 | address + TYPE_FIELD_BITPOS (type, i) / 8, 0, |
| 673 | stream, format, 0, recurse + 1, pretty); */ |
| 674 | val_print (TYPE_FIELD_TYPE (type, i), |
| 675 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
| 676 | address, stream, recurse + 1, val, &opts, |
| 677 | current_language); |
| 678 | } |
| 679 | } |
| 680 | annotate_field_end (); |
| 681 | } |
| 682 | |
| 683 | if (dont_print_statmem == 0) |
| 684 | { |
| 685 | /* Free the space used to deal with the printing |
| 686 | of the members from top level. */ |
| 687 | obstack_free (&dont_print_statmem_obstack, last_dont_print); |
| 688 | dont_print_statmem_obstack = tmp_obstack; |
| 689 | } |
| 690 | |
| 691 | if (options->prettyformat) |
| 692 | { |
| 693 | fprintf_filtered (stream, "\n"); |
| 694 | print_spaces_filtered (2 * recurse, stream); |
| 695 | } |
| 696 | } |
| 697 | fprintf_filtered (stream, "}"); |
| 698 | } |
| 699 | |
| 700 | /* Special val_print routine to avoid printing multiple copies of virtual |
| 701 | baseclasses. */ |
| 702 | |
| 703 | static void |
| 704 | pascal_object_print_value (struct type *type, const gdb_byte *valaddr, |
| 705 | LONGEST offset, |
| 706 | CORE_ADDR address, struct ui_file *stream, |
| 707 | int recurse, |
| 708 | struct value *val, |
| 709 | const struct value_print_options *options, |
| 710 | struct type **dont_print_vb) |
| 711 | { |
| 712 | struct type **last_dont_print |
| 713 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
| 714 | struct obstack tmp_obstack = dont_print_vb_obstack; |
| 715 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
| 716 | |
| 717 | if (dont_print_vb == 0) |
| 718 | { |
| 719 | /* If we're at top level, carve out a completely fresh |
| 720 | chunk of the obstack and use that until this particular |
| 721 | invocation returns. */ |
| 722 | /* Bump up the high-water mark. Now alpha is omega. */ |
| 723 | obstack_finish (&dont_print_vb_obstack); |
| 724 | } |
| 725 | |
| 726 | for (i = 0; i < n_baseclasses; i++) |
| 727 | { |
| 728 | LONGEST boffset = 0; |
| 729 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
| 730 | const char *basename = type_name_no_tag (baseclass); |
| 731 | const gdb_byte *base_valaddr = NULL; |
| 732 | LONGEST thisoffset; |
| 733 | int skip = 0; |
| 734 | gdb::byte_vector buf; |
| 735 | |
| 736 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
| 737 | { |
| 738 | struct type **first_dont_print |
| 739 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
| 740 | |
| 741 | int j = (struct type **) obstack_next_free (&dont_print_vb_obstack) |
| 742 | - first_dont_print; |
| 743 | |
| 744 | while (--j >= 0) |
| 745 | if (baseclass == first_dont_print[j]) |
| 746 | goto flush_it; |
| 747 | |
| 748 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); |
| 749 | } |
| 750 | |
| 751 | thisoffset = offset; |
| 752 | |
| 753 | TRY |
| 754 | { |
| 755 | boffset = baseclass_offset (type, i, valaddr, offset, address, val); |
| 756 | } |
| 757 | CATCH (ex, RETURN_MASK_ERROR) |
| 758 | { |
| 759 | if (ex.error == NOT_AVAILABLE_ERROR) |
| 760 | skip = -1; |
| 761 | else |
| 762 | skip = 1; |
| 763 | } |
| 764 | END_CATCH |
| 765 | |
| 766 | if (skip == 0) |
| 767 | { |
| 768 | /* The virtual base class pointer might have been clobbered by the |
| 769 | user program. Make sure that it still points to a valid memory |
| 770 | location. */ |
| 771 | |
| 772 | if (boffset < 0 || boffset >= TYPE_LENGTH (type)) |
| 773 | { |
| 774 | buf.resize (TYPE_LENGTH (baseclass)); |
| 775 | |
| 776 | base_valaddr = buf.data (); |
| 777 | if (target_read_memory (address + boffset, buf.data (), |
| 778 | TYPE_LENGTH (baseclass)) != 0) |
| 779 | skip = 1; |
| 780 | address = address + boffset; |
| 781 | thisoffset = 0; |
| 782 | boffset = 0; |
| 783 | } |
| 784 | else |
| 785 | base_valaddr = valaddr; |
| 786 | } |
| 787 | |
| 788 | if (options->prettyformat) |
| 789 | { |
| 790 | fprintf_filtered (stream, "\n"); |
| 791 | print_spaces_filtered (2 * recurse, stream); |
| 792 | } |
| 793 | fputs_filtered ("<", stream); |
| 794 | /* Not sure what the best notation is in the case where there is no |
| 795 | baseclass name. */ |
| 796 | |
| 797 | fputs_filtered (basename ? basename : "", stream); |
| 798 | fputs_filtered ("> = ", stream); |
| 799 | |
| 800 | if (skip < 0) |
| 801 | val_print_unavailable (stream); |
| 802 | else if (skip > 0) |
| 803 | val_print_invalid_address (stream); |
| 804 | else |
| 805 | pascal_object_print_value_fields (baseclass, base_valaddr, |
| 806 | thisoffset + boffset, address, |
| 807 | stream, recurse, val, options, |
| 808 | (struct type **) obstack_base (&dont_print_vb_obstack), |
| 809 | 0); |
| 810 | fputs_filtered (", ", stream); |
| 811 | |
| 812 | flush_it: |
| 813 | ; |
| 814 | } |
| 815 | |
| 816 | if (dont_print_vb == 0) |
| 817 | { |
| 818 | /* Free the space used to deal with the printing |
| 819 | of this type from top level. */ |
| 820 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
| 821 | /* Reset watermark so that we can continue protecting |
| 822 | ourselves from whatever we were protecting ourselves. */ |
| 823 | dont_print_vb_obstack = tmp_obstack; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | /* Print value of a static member. |
| 828 | To avoid infinite recursion when printing a class that contains |
| 829 | a static instance of the class, we keep the addresses of all printed |
| 830 | static member classes in an obstack and refuse to print them more |
| 831 | than once. |
| 832 | |
| 833 | VAL contains the value to print, STREAM, RECURSE, and OPTIONS |
| 834 | have the same meanings as in c_val_print. */ |
| 835 | |
| 836 | static void |
| 837 | pascal_object_print_static_field (struct value *val, |
| 838 | struct ui_file *stream, |
| 839 | int recurse, |
| 840 | const struct value_print_options *options) |
| 841 | { |
| 842 | struct type *type = value_type (val); |
| 843 | struct value_print_options opts; |
| 844 | |
| 845 | if (value_entirely_optimized_out (val)) |
| 846 | { |
| 847 | val_print_optimized_out (val, stream); |
| 848 | return; |
| 849 | } |
| 850 | |
| 851 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 852 | { |
| 853 | CORE_ADDR *first_dont_print, addr; |
| 854 | int i; |
| 855 | |
| 856 | first_dont_print |
| 857 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
| 858 | i = (CORE_ADDR *) obstack_next_free (&dont_print_statmem_obstack) |
| 859 | - first_dont_print; |
| 860 | |
| 861 | while (--i >= 0) |
| 862 | { |
| 863 | if (value_address (val) == first_dont_print[i]) |
| 864 | { |
| 865 | fputs_filtered ("\ |
| 866 | <same as static member of an already seen type>", |
| 867 | stream); |
| 868 | return; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | addr = value_address (val); |
| 873 | obstack_grow (&dont_print_statmem_obstack, (char *) &addr, |
| 874 | sizeof (CORE_ADDR)); |
| 875 | |
| 876 | type = check_typedef (type); |
| 877 | pascal_object_print_value_fields (type, |
| 878 | value_contents_for_printing (val), |
| 879 | value_embedded_offset (val), |
| 880 | addr, |
| 881 | stream, recurse, |
| 882 | val, options, NULL, 1); |
| 883 | return; |
| 884 | } |
| 885 | |
| 886 | opts = *options; |
| 887 | opts.deref_ref = 0; |
| 888 | common_val_print (val, stream, recurse, &opts, current_language); |
| 889 | } |
| 890 | |
| 891 | void |
| 892 | _initialize_pascal_valprint (void) |
| 893 | { |
| 894 | add_setshow_boolean_cmd ("pascal_static-members", class_support, |
| 895 | &user_print_options.pascal_static_field_print, _("\ |
| 896 | Set printing of pascal static members."), _("\ |
| 897 | Show printing of pascal static members."), NULL, |
| 898 | NULL, |
| 899 | show_pascal_static_field_print, |
| 900 | &setprintlist, &showprintlist); |
| 901 | } |