| 1 | /* Support for printing Pascal values for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2000, 2001, 2003, 2005, 2006, 2007, 2008 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* This file is derived from c-valprint.c */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "gdb_obstack.h" |
| 25 | #include "symtab.h" |
| 26 | #include "gdbtypes.h" |
| 27 | #include "expression.h" |
| 28 | #include "value.h" |
| 29 | #include "command.h" |
| 30 | #include "gdbcmd.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "demangle.h" |
| 33 | #include "valprint.h" |
| 34 | #include "typeprint.h" |
| 35 | #include "language.h" |
| 36 | #include "target.h" |
| 37 | #include "annotate.h" |
| 38 | #include "p-lang.h" |
| 39 | #include "cp-abi.h" |
| 40 | #include "cp-support.h" |
| 41 | \f |
| 42 | |
| 43 | |
| 44 | |
| 45 | /* Print data of type TYPE located at VALADDR (within GDB), which came from |
| 46 | the inferior at address ADDRESS, onto stdio stream STREAM according to |
| 47 | FORMAT (a letter or 0 for natural format). The data at VALADDR is in |
| 48 | target byte order. |
| 49 | |
| 50 | If the data are a string pointer, returns the number of string characters |
| 51 | printed. |
| 52 | |
| 53 | If DEREF_REF is nonzero, then dereference references, otherwise just print |
| 54 | them like pointers. |
| 55 | |
| 56 | The PRETTY parameter controls prettyprinting. */ |
| 57 | |
| 58 | |
| 59 | int |
| 60 | pascal_val_print (struct type *type, const gdb_byte *valaddr, |
| 61 | int embedded_offset, CORE_ADDR address, |
| 62 | struct ui_file *stream, int format, int deref_ref, |
| 63 | int recurse, enum val_prettyprint pretty) |
| 64 | { |
| 65 | unsigned int i = 0; /* Number of characters printed */ |
| 66 | unsigned len; |
| 67 | struct type *elttype; |
| 68 | unsigned eltlen; |
| 69 | int length_pos, length_size, string_pos; |
| 70 | int char_size; |
| 71 | LONGEST val; |
| 72 | CORE_ADDR addr; |
| 73 | |
| 74 | CHECK_TYPEDEF (type); |
| 75 | switch (TYPE_CODE (type)) |
| 76 | { |
| 77 | case TYPE_CODE_ARRAY: |
| 78 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0) |
| 79 | { |
| 80 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 81 | eltlen = TYPE_LENGTH (elttype); |
| 82 | len = TYPE_LENGTH (type) / eltlen; |
| 83 | if (prettyprint_arrays) |
| 84 | { |
| 85 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 86 | } |
| 87 | /* For an array of chars, print with string syntax. */ |
| 88 | if (eltlen == 1 |
| 89 | && ((TYPE_CODE (elttype) == TYPE_CODE_INT) |
| 90 | || ((current_language->la_language == language_pascal) |
| 91 | && (TYPE_CODE (elttype) == TYPE_CODE_CHAR))) |
| 92 | && (format == 0 || format == 's')) |
| 93 | { |
| 94 | /* If requested, look for the first null char and only print |
| 95 | elements up to it. */ |
| 96 | if (stop_print_at_null) |
| 97 | { |
| 98 | unsigned int temp_len; |
| 99 | |
| 100 | /* Look for a NULL char. */ |
| 101 | for (temp_len = 0; |
| 102 | (valaddr + embedded_offset)[temp_len] |
| 103 | && temp_len < len && temp_len < print_max; |
| 104 | temp_len++); |
| 105 | len = temp_len; |
| 106 | } |
| 107 | |
| 108 | LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0); |
| 109 | i = len; |
| 110 | } |
| 111 | else |
| 112 | { |
| 113 | fprintf_filtered (stream, "{"); |
| 114 | /* If this is a virtual function table, print the 0th |
| 115 | entry specially, and the rest of the members normally. */ |
| 116 | if (pascal_object_is_vtbl_ptr_type (elttype)) |
| 117 | { |
| 118 | i = 1; |
| 119 | fprintf_filtered (stream, "%d vtable entries", len - 1); |
| 120 | } |
| 121 | else |
| 122 | { |
| 123 | i = 0; |
| 124 | } |
| 125 | val_print_array_elements (type, valaddr + embedded_offset, address, stream, |
| 126 | format, deref_ref, recurse, pretty, i); |
| 127 | fprintf_filtered (stream, "}"); |
| 128 | } |
| 129 | break; |
| 130 | } |
| 131 | /* Array of unspecified length: treat like pointer to first elt. */ |
| 132 | addr = address; |
| 133 | goto print_unpacked_pointer; |
| 134 | |
| 135 | case TYPE_CODE_PTR: |
| 136 | if (format && format != 's') |
| 137 | { |
| 138 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 139 | break; |
| 140 | } |
| 141 | if (vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
| 142 | { |
| 143 | /* Print the unmangled name if desired. */ |
| 144 | /* Print vtable entry - we only get here if we ARE using |
| 145 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */ |
| 146 | /* Extract the address, assume that it is unsigned. */ |
| 147 | print_address_demangle (extract_unsigned_integer (valaddr + embedded_offset, TYPE_LENGTH (type)), |
| 148 | stream, demangle); |
| 149 | break; |
| 150 | } |
| 151 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 152 | { |
| 153 | addr = unpack_pointer (type, valaddr + embedded_offset); |
| 154 | print_unpacked_pointer: |
| 155 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 156 | |
| 157 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) |
| 158 | { |
| 159 | /* Try to print what function it points to. */ |
| 160 | print_address_demangle (addr, stream, demangle); |
| 161 | /* Return value is irrelevant except for string pointers. */ |
| 162 | return (0); |
| 163 | } |
| 164 | |
| 165 | if (addressprint && format != 's') |
| 166 | { |
| 167 | fputs_filtered (paddress (addr), stream); |
| 168 | } |
| 169 | |
| 170 | /* For a pointer to char or unsigned char, also print the string |
| 171 | pointed to, unless pointer is null. */ |
| 172 | if (TYPE_LENGTH (elttype) == 1 |
| 173 | && (TYPE_CODE (elttype) == TYPE_CODE_INT |
| 174 | || TYPE_CODE(elttype) == TYPE_CODE_CHAR) |
| 175 | && (format == 0 || format == 's') |
| 176 | && addr != 0) |
| 177 | { |
| 178 | /* no wide string yet */ |
| 179 | i = val_print_string (addr, -1, 1, stream); |
| 180 | } |
| 181 | /* also for pointers to pascal strings */ |
| 182 | /* Note: this is Free Pascal specific: |
| 183 | as GDB does not recognize stabs pascal strings |
| 184 | Pascal strings are mapped to records |
| 185 | with lowercase names PM */ |
| 186 | if (is_pascal_string_type (elttype, &length_pos, &length_size, |
| 187 | &string_pos, &char_size, NULL) |
| 188 | && addr != 0) |
| 189 | { |
| 190 | ULONGEST string_length; |
| 191 | void *buffer; |
| 192 | buffer = xmalloc (length_size); |
| 193 | read_memory (addr + length_pos, buffer, length_size); |
| 194 | string_length = extract_unsigned_integer (buffer, length_size); |
| 195 | xfree (buffer); |
| 196 | i = val_print_string (addr + string_pos, string_length, char_size, stream); |
| 197 | } |
| 198 | else if (pascal_object_is_vtbl_member (type)) |
| 199 | { |
| 200 | /* print vtbl's nicely */ |
| 201 | CORE_ADDR vt_address = unpack_pointer (type, valaddr + embedded_offset); |
| 202 | |
| 203 | struct minimal_symbol *msymbol = |
| 204 | lookup_minimal_symbol_by_pc (vt_address); |
| 205 | if ((msymbol != NULL) |
| 206 | && (vt_address == SYMBOL_VALUE_ADDRESS (msymbol))) |
| 207 | { |
| 208 | fputs_filtered (" <", stream); |
| 209 | fputs_filtered (SYMBOL_PRINT_NAME (msymbol), stream); |
| 210 | fputs_filtered (">", stream); |
| 211 | } |
| 212 | if (vt_address && vtblprint) |
| 213 | { |
| 214 | struct value *vt_val; |
| 215 | struct symbol *wsym = (struct symbol *) NULL; |
| 216 | struct type *wtype; |
| 217 | struct block *block = (struct block *) NULL; |
| 218 | int is_this_fld; |
| 219 | |
| 220 | if (msymbol != NULL) |
| 221 | wsym = lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol), block, |
| 222 | VAR_DOMAIN, &is_this_fld, NULL); |
| 223 | |
| 224 | if (wsym) |
| 225 | { |
| 226 | wtype = SYMBOL_TYPE (wsym); |
| 227 | } |
| 228 | else |
| 229 | { |
| 230 | wtype = TYPE_TARGET_TYPE (type); |
| 231 | } |
| 232 | vt_val = value_at (wtype, vt_address); |
| 233 | common_val_print (vt_val, stream, format, deref_ref, |
| 234 | recurse + 1, pretty); |
| 235 | if (pretty) |
| 236 | { |
| 237 | fprintf_filtered (stream, "\n"); |
| 238 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /* Return number of characters printed, including the terminating |
| 244 | '\0' if we reached the end. val_print_string takes care including |
| 245 | the terminating '\0' if necessary. */ |
| 246 | return i; |
| 247 | } |
| 248 | break; |
| 249 | |
| 250 | case TYPE_CODE_REF: |
| 251 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 252 | if (addressprint) |
| 253 | { |
| 254 | fprintf_filtered (stream, "@"); |
| 255 | /* Extract the address, assume that it is unsigned. */ |
| 256 | fputs_filtered (paddress ( |
| 257 | extract_unsigned_integer (valaddr + embedded_offset, |
| 258 | gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT)), stream); |
| 259 | if (deref_ref) |
| 260 | fputs_filtered (": ", stream); |
| 261 | } |
| 262 | /* De-reference the reference. */ |
| 263 | if (deref_ref) |
| 264 | { |
| 265 | if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF) |
| 266 | { |
| 267 | struct value *deref_val = |
| 268 | value_at |
| 269 | (TYPE_TARGET_TYPE (type), |
| 270 | unpack_pointer (lookup_pointer_type (builtin_type_void), |
| 271 | valaddr + embedded_offset)); |
| 272 | common_val_print (deref_val, stream, format, deref_ref, |
| 273 | recurse + 1, pretty); |
| 274 | } |
| 275 | else |
| 276 | fputs_filtered ("???", stream); |
| 277 | } |
| 278 | break; |
| 279 | |
| 280 | case TYPE_CODE_UNION: |
| 281 | if (recurse && !unionprint) |
| 282 | { |
| 283 | fprintf_filtered (stream, "{...}"); |
| 284 | break; |
| 285 | } |
| 286 | /* Fall through. */ |
| 287 | case TYPE_CODE_STRUCT: |
| 288 | if (vtblprint && pascal_object_is_vtbl_ptr_type (type)) |
| 289 | { |
| 290 | /* Print the unmangled name if desired. */ |
| 291 | /* Print vtable entry - we only get here if NOT using |
| 292 | -fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */ |
| 293 | /* Extract the address, assume that it is unsigned. */ |
| 294 | print_address_demangle |
| 295 | (extract_unsigned_integer (valaddr + embedded_offset + TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8, |
| 296 | TYPE_LENGTH (TYPE_FIELD_TYPE (type, VTBL_FNADDR_OFFSET))), |
| 297 | stream, demangle); |
| 298 | } |
| 299 | else |
| 300 | { |
| 301 | if (is_pascal_string_type (type, &length_pos, &length_size, |
| 302 | &string_pos, &char_size, NULL)) |
| 303 | { |
| 304 | len = extract_unsigned_integer (valaddr + embedded_offset + length_pos, length_size); |
| 305 | LA_PRINT_STRING (stream, valaddr + embedded_offset + string_pos, len, char_size, 0); |
| 306 | } |
| 307 | else |
| 308 | pascal_object_print_value_fields (type, valaddr + embedded_offset, address, stream, format, |
| 309 | recurse, pretty, NULL, 0); |
| 310 | } |
| 311 | break; |
| 312 | |
| 313 | case TYPE_CODE_ENUM: |
| 314 | if (format) |
| 315 | { |
| 316 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 317 | break; |
| 318 | } |
| 319 | len = TYPE_NFIELDS (type); |
| 320 | val = unpack_long (type, valaddr + embedded_offset); |
| 321 | for (i = 0; i < len; i++) |
| 322 | { |
| 323 | QUIT; |
| 324 | if (val == TYPE_FIELD_BITPOS (type, i)) |
| 325 | { |
| 326 | break; |
| 327 | } |
| 328 | } |
| 329 | if (i < len) |
| 330 | { |
| 331 | fputs_filtered (TYPE_FIELD_NAME (type, i), stream); |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | print_longest (stream, 'd', 0, val); |
| 336 | } |
| 337 | break; |
| 338 | |
| 339 | case TYPE_CODE_FLAGS: |
| 340 | if (format) |
| 341 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 342 | else |
| 343 | val_print_type_code_flags (type, valaddr + embedded_offset, stream); |
| 344 | break; |
| 345 | |
| 346 | case TYPE_CODE_FUNC: |
| 347 | if (format) |
| 348 | { |
| 349 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 350 | break; |
| 351 | } |
| 352 | /* FIXME, we should consider, at least for ANSI C language, eliminating |
| 353 | the distinction made between FUNCs and POINTERs to FUNCs. */ |
| 354 | fprintf_filtered (stream, "{"); |
| 355 | type_print (type, "", stream, -1); |
| 356 | fprintf_filtered (stream, "} "); |
| 357 | /* Try to print what function it points to, and its address. */ |
| 358 | print_address_demangle (address, stream, demangle); |
| 359 | break; |
| 360 | |
| 361 | case TYPE_CODE_BOOL: |
| 362 | format = format ? format : output_format; |
| 363 | if (format) |
| 364 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 365 | else |
| 366 | { |
| 367 | val = unpack_long (type, valaddr + embedded_offset); |
| 368 | if (val == 0) |
| 369 | fputs_filtered ("false", stream); |
| 370 | else if (val == 1) |
| 371 | fputs_filtered ("true", stream); |
| 372 | else |
| 373 | { |
| 374 | fputs_filtered ("true (", stream); |
| 375 | fprintf_filtered (stream, "%ld)", (long int) val); |
| 376 | } |
| 377 | } |
| 378 | break; |
| 379 | |
| 380 | case TYPE_CODE_RANGE: |
| 381 | /* FIXME: create_range_type does not set the unsigned bit in a |
| 382 | range type (I think it probably should copy it from the target |
| 383 | type), so we won't print values which are too large to |
| 384 | fit in a signed integer correctly. */ |
| 385 | /* FIXME: Doesn't handle ranges of enums correctly. (Can't just |
| 386 | print with the target type, though, because the size of our type |
| 387 | and the target type might differ). */ |
| 388 | /* FALLTHROUGH */ |
| 389 | |
| 390 | case TYPE_CODE_INT: |
| 391 | format = format ? format : output_format; |
| 392 | if (format) |
| 393 | { |
| 394 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 395 | } |
| 396 | else |
| 397 | { |
| 398 | val_print_type_code_int (type, valaddr + embedded_offset, stream); |
| 399 | } |
| 400 | break; |
| 401 | |
| 402 | case TYPE_CODE_CHAR: |
| 403 | format = format ? format : output_format; |
| 404 | if (format) |
| 405 | { |
| 406 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 407 | } |
| 408 | else |
| 409 | { |
| 410 | val = unpack_long (type, valaddr + embedded_offset); |
| 411 | if (TYPE_UNSIGNED (type)) |
| 412 | fprintf_filtered (stream, "%u", (unsigned int) val); |
| 413 | else |
| 414 | fprintf_filtered (stream, "%d", (int) val); |
| 415 | fputs_filtered (" ", stream); |
| 416 | LA_PRINT_CHAR ((unsigned char) val, stream); |
| 417 | } |
| 418 | break; |
| 419 | |
| 420 | case TYPE_CODE_FLT: |
| 421 | if (format) |
| 422 | { |
| 423 | print_scalar_formatted (valaddr + embedded_offset, type, format, 0, stream); |
| 424 | } |
| 425 | else |
| 426 | { |
| 427 | print_floating (valaddr + embedded_offset, type, stream); |
| 428 | } |
| 429 | break; |
| 430 | |
| 431 | case TYPE_CODE_BITSTRING: |
| 432 | case TYPE_CODE_SET: |
| 433 | elttype = TYPE_INDEX_TYPE (type); |
| 434 | CHECK_TYPEDEF (elttype); |
| 435 | if (TYPE_STUB (elttype)) |
| 436 | { |
| 437 | fprintf_filtered (stream, "<incomplete type>"); |
| 438 | gdb_flush (stream); |
| 439 | break; |
| 440 | } |
| 441 | else |
| 442 | { |
| 443 | struct type *range = elttype; |
| 444 | LONGEST low_bound, high_bound; |
| 445 | int i; |
| 446 | int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING; |
| 447 | int need_comma = 0; |
| 448 | |
| 449 | if (is_bitstring) |
| 450 | fputs_filtered ("B'", stream); |
| 451 | else |
| 452 | fputs_filtered ("[", stream); |
| 453 | |
| 454 | i = get_discrete_bounds (range, &low_bound, &high_bound); |
| 455 | maybe_bad_bstring: |
| 456 | if (i < 0) |
| 457 | { |
| 458 | fputs_filtered ("<error value>", stream); |
| 459 | goto done; |
| 460 | } |
| 461 | |
| 462 | for (i = low_bound; i <= high_bound; i++) |
| 463 | { |
| 464 | int element = value_bit_index (type, valaddr + embedded_offset, i); |
| 465 | if (element < 0) |
| 466 | { |
| 467 | i = element; |
| 468 | goto maybe_bad_bstring; |
| 469 | } |
| 470 | if (is_bitstring) |
| 471 | fprintf_filtered (stream, "%d", element); |
| 472 | else if (element) |
| 473 | { |
| 474 | if (need_comma) |
| 475 | fputs_filtered (", ", stream); |
| 476 | print_type_scalar (range, i, stream); |
| 477 | need_comma = 1; |
| 478 | |
| 479 | if (i + 1 <= high_bound && value_bit_index (type, valaddr + embedded_offset, ++i)) |
| 480 | { |
| 481 | int j = i; |
| 482 | fputs_filtered ("..", stream); |
| 483 | while (i + 1 <= high_bound |
| 484 | && value_bit_index (type, valaddr + embedded_offset, ++i)) |
| 485 | j = i; |
| 486 | print_type_scalar (range, j, stream); |
| 487 | } |
| 488 | } |
| 489 | } |
| 490 | done: |
| 491 | if (is_bitstring) |
| 492 | fputs_filtered ("'", stream); |
| 493 | else |
| 494 | fputs_filtered ("]", stream); |
| 495 | } |
| 496 | break; |
| 497 | |
| 498 | case TYPE_CODE_VOID: |
| 499 | fprintf_filtered (stream, "void"); |
| 500 | break; |
| 501 | |
| 502 | case TYPE_CODE_ERROR: |
| 503 | fprintf_filtered (stream, "<error type>"); |
| 504 | break; |
| 505 | |
| 506 | case TYPE_CODE_UNDEF: |
| 507 | /* This happens (without TYPE_FLAG_STUB set) on systems which don't use |
| 508 | dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar" |
| 509 | and no complete type for struct foo in that file. */ |
| 510 | fprintf_filtered (stream, "<incomplete type>"); |
| 511 | break; |
| 512 | |
| 513 | default: |
| 514 | error (_("Invalid pascal type code %d in symbol table."), TYPE_CODE (type)); |
| 515 | } |
| 516 | gdb_flush (stream); |
| 517 | return (0); |
| 518 | } |
| 519 | \f |
| 520 | int |
| 521 | pascal_value_print (struct value *val, struct ui_file *stream, int format, |
| 522 | enum val_prettyprint pretty) |
| 523 | { |
| 524 | struct type *type = value_type (val); |
| 525 | |
| 526 | /* If it is a pointer, indicate what it points to. |
| 527 | |
| 528 | Print type also if it is a reference. |
| 529 | |
| 530 | Object pascal: if it is a member pointer, we will take care |
| 531 | of that when we print it. */ |
| 532 | if (TYPE_CODE (type) == TYPE_CODE_PTR |
| 533 | || TYPE_CODE (type) == TYPE_CODE_REF) |
| 534 | { |
| 535 | /* Hack: remove (char *) for char strings. Their |
| 536 | type is indicated by the quoted string anyway. */ |
| 537 | if (TYPE_CODE (type) == TYPE_CODE_PTR |
| 538 | && TYPE_NAME (type) == NULL |
| 539 | && TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL |
| 540 | && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0) |
| 541 | { |
| 542 | /* Print nothing */ |
| 543 | } |
| 544 | else |
| 545 | { |
| 546 | fprintf_filtered (stream, "("); |
| 547 | type_print (type, "", stream, -1); |
| 548 | fprintf_filtered (stream, ") "); |
| 549 | } |
| 550 | } |
| 551 | return common_val_print (val, stream, format, 1, 0, pretty); |
| 552 | } |
| 553 | |
| 554 | |
| 555 | /****************************************************************************** |
| 556 | Inserted from cp-valprint |
| 557 | ******************************************************************************/ |
| 558 | |
| 559 | extern int vtblprint; /* Controls printing of vtbl's */ |
| 560 | extern int objectprint; /* Controls looking up an object's derived type |
| 561 | using what we find in its vtables. */ |
| 562 | static int pascal_static_field_print; /* Controls printing of static fields. */ |
| 563 | static void |
| 564 | show_pascal_static_field_print (struct ui_file *file, int from_tty, |
| 565 | struct cmd_list_element *c, const char *value) |
| 566 | { |
| 567 | fprintf_filtered (file, _("Printing of pascal static members is %s.\n"), |
| 568 | value); |
| 569 | } |
| 570 | |
| 571 | static struct obstack dont_print_vb_obstack; |
| 572 | static struct obstack dont_print_statmem_obstack; |
| 573 | |
| 574 | static void pascal_object_print_static_field (struct value *, |
| 575 | struct ui_file *, int, int, |
| 576 | enum val_prettyprint); |
| 577 | |
| 578 | static void pascal_object_print_value (struct type *, const gdb_byte *, |
| 579 | CORE_ADDR, struct ui_file *, |
| 580 | int, int, enum val_prettyprint, |
| 581 | struct type **); |
| 582 | |
| 583 | /* It was changed to this after 2.4.5. */ |
| 584 | const char pascal_vtbl_ptr_name[] = |
| 585 | {'_', '_', 'v', 't', 'b', 'l', '_', 'p', 't', 'r', '_', 't', 'y', 'p', 'e', 0}; |
| 586 | |
| 587 | /* Return truth value for assertion that TYPE is of the type |
| 588 | "pointer to virtual function". */ |
| 589 | |
| 590 | int |
| 591 | pascal_object_is_vtbl_ptr_type (struct type *type) |
| 592 | { |
| 593 | char *typename = type_name_no_tag (type); |
| 594 | |
| 595 | return (typename != NULL |
| 596 | && strcmp (typename, pascal_vtbl_ptr_name) == 0); |
| 597 | } |
| 598 | |
| 599 | /* Return truth value for the assertion that TYPE is of the type |
| 600 | "pointer to virtual function table". */ |
| 601 | |
| 602 | int |
| 603 | pascal_object_is_vtbl_member (struct type *type) |
| 604 | { |
| 605 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
| 606 | { |
| 607 | type = TYPE_TARGET_TYPE (type); |
| 608 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 609 | { |
| 610 | type = TYPE_TARGET_TYPE (type); |
| 611 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */ |
| 612 | || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */ |
| 613 | { |
| 614 | /* Virtual functions tables are full of pointers |
| 615 | to virtual functions. */ |
| 616 | return pascal_object_is_vtbl_ptr_type (type); |
| 617 | } |
| 618 | } |
| 619 | } |
| 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | /* Mutually recursive subroutines of pascal_object_print_value and |
| 624 | c_val_print to print out a structure's fields: |
| 625 | pascal_object_print_value_fields and pascal_object_print_value. |
| 626 | |
| 627 | TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the |
| 628 | same meanings as in pascal_object_print_value and c_val_print. |
| 629 | |
| 630 | DONT_PRINT is an array of baseclass types that we |
| 631 | should not print, or zero if called from top level. */ |
| 632 | |
| 633 | void |
| 634 | pascal_object_print_value_fields (struct type *type, const gdb_byte *valaddr, |
| 635 | CORE_ADDR address, struct ui_file *stream, |
| 636 | int format, int recurse, |
| 637 | enum val_prettyprint pretty, |
| 638 | struct type **dont_print_vb, |
| 639 | int dont_print_statmem) |
| 640 | { |
| 641 | int i, len, n_baseclasses; |
| 642 | char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack); |
| 643 | |
| 644 | CHECK_TYPEDEF (type); |
| 645 | |
| 646 | fprintf_filtered (stream, "{"); |
| 647 | len = TYPE_NFIELDS (type); |
| 648 | n_baseclasses = TYPE_N_BASECLASSES (type); |
| 649 | |
| 650 | /* Print out baseclasses such that we don't print |
| 651 | duplicates of virtual baseclasses. */ |
| 652 | if (n_baseclasses > 0) |
| 653 | pascal_object_print_value (type, valaddr, address, stream, |
| 654 | format, recurse + 1, pretty, dont_print_vb); |
| 655 | |
| 656 | if (!len && n_baseclasses == 1) |
| 657 | fprintf_filtered (stream, "<No data fields>"); |
| 658 | else |
| 659 | { |
| 660 | struct obstack tmp_obstack = dont_print_statmem_obstack; |
| 661 | int fields_seen = 0; |
| 662 | |
| 663 | if (dont_print_statmem == 0) |
| 664 | { |
| 665 | /* If we're at top level, carve out a completely fresh |
| 666 | chunk of the obstack and use that until this particular |
| 667 | invocation returns. */ |
| 668 | obstack_finish (&dont_print_statmem_obstack); |
| 669 | } |
| 670 | |
| 671 | for (i = n_baseclasses; i < len; i++) |
| 672 | { |
| 673 | /* If requested, skip printing of static fields. */ |
| 674 | if (!pascal_static_field_print && TYPE_FIELD_STATIC (type, i)) |
| 675 | continue; |
| 676 | if (fields_seen) |
| 677 | fprintf_filtered (stream, ", "); |
| 678 | else if (n_baseclasses > 0) |
| 679 | { |
| 680 | if (pretty) |
| 681 | { |
| 682 | fprintf_filtered (stream, "\n"); |
| 683 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 684 | fputs_filtered ("members of ", stream); |
| 685 | fputs_filtered (type_name_no_tag (type), stream); |
| 686 | fputs_filtered (": ", stream); |
| 687 | } |
| 688 | } |
| 689 | fields_seen = 1; |
| 690 | |
| 691 | if (pretty) |
| 692 | { |
| 693 | fprintf_filtered (stream, "\n"); |
| 694 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 695 | } |
| 696 | else |
| 697 | { |
| 698 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 699 | } |
| 700 | if (inspect_it) |
| 701 | { |
| 702 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) |
| 703 | fputs_filtered ("\"( ptr \"", stream); |
| 704 | else |
| 705 | fputs_filtered ("\"( nodef \"", stream); |
| 706 | if (TYPE_FIELD_STATIC (type, i)) |
| 707 | fputs_filtered ("static ", stream); |
| 708 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 709 | language_cplus, |
| 710 | DMGL_PARAMS | DMGL_ANSI); |
| 711 | fputs_filtered ("\" \"", stream); |
| 712 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 713 | language_cplus, |
| 714 | DMGL_PARAMS | DMGL_ANSI); |
| 715 | fputs_filtered ("\") \"", stream); |
| 716 | } |
| 717 | else |
| 718 | { |
| 719 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); |
| 720 | |
| 721 | if (TYPE_FIELD_STATIC (type, i)) |
| 722 | fputs_filtered ("static ", stream); |
| 723 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 724 | language_cplus, |
| 725 | DMGL_PARAMS | DMGL_ANSI); |
| 726 | annotate_field_name_end (); |
| 727 | fputs_filtered (" = ", stream); |
| 728 | annotate_field_value (); |
| 729 | } |
| 730 | |
| 731 | if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i)) |
| 732 | { |
| 733 | struct value *v; |
| 734 | |
| 735 | /* Bitfields require special handling, especially due to byte |
| 736 | order problems. */ |
| 737 | if (TYPE_FIELD_IGNORE (type, i)) |
| 738 | { |
| 739 | fputs_filtered ("<optimized out or zero length>", stream); |
| 740 | } |
| 741 | else |
| 742 | { |
| 743 | v = value_from_longest (TYPE_FIELD_TYPE (type, i), |
| 744 | unpack_field_as_long (type, valaddr, i)); |
| 745 | |
| 746 | common_val_print (v, stream, format, 0, recurse + 1, pretty); |
| 747 | } |
| 748 | } |
| 749 | else |
| 750 | { |
| 751 | if (TYPE_FIELD_IGNORE (type, i)) |
| 752 | { |
| 753 | fputs_filtered ("<optimized out or zero length>", stream); |
| 754 | } |
| 755 | else if (TYPE_FIELD_STATIC (type, i)) |
| 756 | { |
| 757 | /* struct value *v = value_static_field (type, i); v4.17 specific */ |
| 758 | struct value *v; |
| 759 | v = value_from_longest (TYPE_FIELD_TYPE (type, i), |
| 760 | unpack_field_as_long (type, valaddr, i)); |
| 761 | |
| 762 | if (v == NULL) |
| 763 | fputs_filtered ("<optimized out>", stream); |
| 764 | else |
| 765 | pascal_object_print_static_field (v, stream, format, |
| 766 | recurse + 1, pretty); |
| 767 | } |
| 768 | else |
| 769 | { |
| 770 | /* val_print (TYPE_FIELD_TYPE (type, i), |
| 771 | valaddr + TYPE_FIELD_BITPOS (type, i) / 8, |
| 772 | address + TYPE_FIELD_BITPOS (type, i) / 8, 0, |
| 773 | stream, format, 0, recurse + 1, pretty); */ |
| 774 | val_print (TYPE_FIELD_TYPE (type, i), |
| 775 | valaddr, TYPE_FIELD_BITPOS (type, i) / 8, |
| 776 | address + TYPE_FIELD_BITPOS (type, i) / 8, |
| 777 | stream, format, 0, recurse + 1, pretty); |
| 778 | } |
| 779 | } |
| 780 | annotate_field_end (); |
| 781 | } |
| 782 | |
| 783 | if (dont_print_statmem == 0) |
| 784 | { |
| 785 | /* Free the space used to deal with the printing |
| 786 | of the members from top level. */ |
| 787 | obstack_free (&dont_print_statmem_obstack, last_dont_print); |
| 788 | dont_print_statmem_obstack = tmp_obstack; |
| 789 | } |
| 790 | |
| 791 | if (pretty) |
| 792 | { |
| 793 | fprintf_filtered (stream, "\n"); |
| 794 | print_spaces_filtered (2 * recurse, stream); |
| 795 | } |
| 796 | } |
| 797 | fprintf_filtered (stream, "}"); |
| 798 | } |
| 799 | |
| 800 | /* Special val_print routine to avoid printing multiple copies of virtual |
| 801 | baseclasses. */ |
| 802 | |
| 803 | static void |
| 804 | pascal_object_print_value (struct type *type, const gdb_byte *valaddr, |
| 805 | CORE_ADDR address, struct ui_file *stream, |
| 806 | int format, int recurse, |
| 807 | enum val_prettyprint pretty, |
| 808 | struct type **dont_print_vb) |
| 809 | { |
| 810 | struct type **last_dont_print |
| 811 | = (struct type **) obstack_next_free (&dont_print_vb_obstack); |
| 812 | struct obstack tmp_obstack = dont_print_vb_obstack; |
| 813 | int i, n_baseclasses = TYPE_N_BASECLASSES (type); |
| 814 | |
| 815 | if (dont_print_vb == 0) |
| 816 | { |
| 817 | /* If we're at top level, carve out a completely fresh |
| 818 | chunk of the obstack and use that until this particular |
| 819 | invocation returns. */ |
| 820 | /* Bump up the high-water mark. Now alpha is omega. */ |
| 821 | obstack_finish (&dont_print_vb_obstack); |
| 822 | } |
| 823 | |
| 824 | for (i = 0; i < n_baseclasses; i++) |
| 825 | { |
| 826 | int boffset; |
| 827 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
| 828 | char *basename = type_name_no_tag (baseclass); |
| 829 | const gdb_byte *base_valaddr; |
| 830 | |
| 831 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
| 832 | { |
| 833 | struct type **first_dont_print |
| 834 | = (struct type **) obstack_base (&dont_print_vb_obstack); |
| 835 | |
| 836 | int j = (struct type **) obstack_next_free (&dont_print_vb_obstack) |
| 837 | - first_dont_print; |
| 838 | |
| 839 | while (--j >= 0) |
| 840 | if (baseclass == first_dont_print[j]) |
| 841 | goto flush_it; |
| 842 | |
| 843 | obstack_ptr_grow (&dont_print_vb_obstack, baseclass); |
| 844 | } |
| 845 | |
| 846 | boffset = baseclass_offset (type, i, valaddr, address); |
| 847 | |
| 848 | if (pretty) |
| 849 | { |
| 850 | fprintf_filtered (stream, "\n"); |
| 851 | print_spaces_filtered (2 * recurse, stream); |
| 852 | } |
| 853 | fputs_filtered ("<", stream); |
| 854 | /* Not sure what the best notation is in the case where there is no |
| 855 | baseclass name. */ |
| 856 | |
| 857 | fputs_filtered (basename ? basename : "", stream); |
| 858 | fputs_filtered ("> = ", stream); |
| 859 | |
| 860 | /* The virtual base class pointer might have been clobbered by the |
| 861 | user program. Make sure that it still points to a valid memory |
| 862 | location. */ |
| 863 | |
| 864 | if (boffset != -1 && (boffset < 0 || boffset >= TYPE_LENGTH (type))) |
| 865 | { |
| 866 | /* FIXME (alloc): not safe is baseclass is really really big. */ |
| 867 | gdb_byte *buf = alloca (TYPE_LENGTH (baseclass)); |
| 868 | base_valaddr = buf; |
| 869 | if (target_read_memory (address + boffset, buf, |
| 870 | TYPE_LENGTH (baseclass)) != 0) |
| 871 | boffset = -1; |
| 872 | } |
| 873 | else |
| 874 | base_valaddr = valaddr + boffset; |
| 875 | |
| 876 | if (boffset == -1) |
| 877 | fprintf_filtered (stream, "<invalid address>"); |
| 878 | else |
| 879 | pascal_object_print_value_fields (baseclass, base_valaddr, address + boffset, |
| 880 | stream, format, recurse, pretty, |
| 881 | (struct type **) obstack_base (&dont_print_vb_obstack), |
| 882 | 0); |
| 883 | fputs_filtered (", ", stream); |
| 884 | |
| 885 | flush_it: |
| 886 | ; |
| 887 | } |
| 888 | |
| 889 | if (dont_print_vb == 0) |
| 890 | { |
| 891 | /* Free the space used to deal with the printing |
| 892 | of this type from top level. */ |
| 893 | obstack_free (&dont_print_vb_obstack, last_dont_print); |
| 894 | /* Reset watermark so that we can continue protecting |
| 895 | ourselves from whatever we were protecting ourselves. */ |
| 896 | dont_print_vb_obstack = tmp_obstack; |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | /* Print value of a static member. |
| 901 | To avoid infinite recursion when printing a class that contains |
| 902 | a static instance of the class, we keep the addresses of all printed |
| 903 | static member classes in an obstack and refuse to print them more |
| 904 | than once. |
| 905 | |
| 906 | VAL contains the value to print, STREAM, RECURSE, and PRETTY |
| 907 | have the same meanings as in c_val_print. */ |
| 908 | |
| 909 | static void |
| 910 | pascal_object_print_static_field (struct value *val, |
| 911 | struct ui_file *stream, int format, |
| 912 | int recurse, enum val_prettyprint pretty) |
| 913 | { |
| 914 | struct type *type = value_type (val); |
| 915 | |
| 916 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 917 | { |
| 918 | CORE_ADDR *first_dont_print; |
| 919 | int i; |
| 920 | |
| 921 | first_dont_print |
| 922 | = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack); |
| 923 | i = (CORE_ADDR *) obstack_next_free (&dont_print_statmem_obstack) |
| 924 | - first_dont_print; |
| 925 | |
| 926 | while (--i >= 0) |
| 927 | { |
| 928 | if (VALUE_ADDRESS (val) == first_dont_print[i]) |
| 929 | { |
| 930 | fputs_filtered ("<same as static member of an already seen type>", |
| 931 | stream); |
| 932 | return; |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | obstack_grow (&dont_print_statmem_obstack, (char *) &VALUE_ADDRESS (val), |
| 937 | sizeof (CORE_ADDR)); |
| 938 | |
| 939 | CHECK_TYPEDEF (type); |
| 940 | pascal_object_print_value_fields (type, value_contents (val), VALUE_ADDRESS (val), |
| 941 | stream, format, recurse, pretty, NULL, 1); |
| 942 | return; |
| 943 | } |
| 944 | common_val_print (val, stream, format, 0, recurse, pretty); |
| 945 | } |
| 946 | |
| 947 | extern initialize_file_ftype _initialize_pascal_valprint; /* -Wmissing-prototypes */ |
| 948 | |
| 949 | void |
| 950 | _initialize_pascal_valprint (void) |
| 951 | { |
| 952 | add_setshow_boolean_cmd ("pascal_static-members", class_support, |
| 953 | &pascal_static_field_print, _("\ |
| 954 | Set printing of pascal static members."), _("\ |
| 955 | Show printing of pascal static members."), NULL, |
| 956 | NULL, |
| 957 | show_pascal_static_field_print, |
| 958 | &setprintlist, &showprintlist); |
| 959 | /* Turn on printing of static fields. */ |
| 960 | pascal_static_field_print = 1; |
| 961 | |
| 962 | } |