| 1 | /* C language support routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1992-2020 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 | #include "defs.h" |
| 21 | #include "symtab.h" |
| 22 | #include "gdbtypes.h" |
| 23 | #include "expression.h" |
| 24 | #include "parser-defs.h" |
| 25 | #include "language.h" |
| 26 | #include "varobj.h" |
| 27 | #include "c-lang.h" |
| 28 | #include "c-support.h" |
| 29 | #include "valprint.h" |
| 30 | #include "macroscope.h" |
| 31 | #include "charset.h" |
| 32 | #include "demangle.h" |
| 33 | #include "cp-abi.h" |
| 34 | #include "cp-support.h" |
| 35 | #include "gdb_obstack.h" |
| 36 | #include <ctype.h> |
| 37 | #include "gdbcore.h" |
| 38 | #include "gdbarch.h" |
| 39 | |
| 40 | class compile_instance; |
| 41 | |
| 42 | /* Given a C string type, STR_TYPE, return the corresponding target |
| 43 | character set name. */ |
| 44 | |
| 45 | static const char * |
| 46 | charset_for_string_type (c_string_type str_type, struct gdbarch *gdbarch) |
| 47 | { |
| 48 | switch (str_type & ~C_CHAR) |
| 49 | { |
| 50 | case C_STRING: |
| 51 | return target_charset (gdbarch); |
| 52 | case C_WIDE_STRING: |
| 53 | return target_wide_charset (gdbarch); |
| 54 | case C_STRING_16: |
| 55 | /* FIXME: UTF-16 is not always correct. */ |
| 56 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 57 | return "UTF-16BE"; |
| 58 | else |
| 59 | return "UTF-16LE"; |
| 60 | case C_STRING_32: |
| 61 | /* FIXME: UTF-32 is not always correct. */ |
| 62 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 63 | return "UTF-32BE"; |
| 64 | else |
| 65 | return "UTF-32LE"; |
| 66 | } |
| 67 | internal_error (__FILE__, __LINE__, _("unhandled c_string_type")); |
| 68 | } |
| 69 | |
| 70 | /* Classify ELTTYPE according to what kind of character it is. Return |
| 71 | the enum constant representing the character type. Also set |
| 72 | *ENCODING to the name of the character set to use when converting |
| 73 | characters of this type in target BYTE_ORDER to the host character |
| 74 | set. */ |
| 75 | |
| 76 | static c_string_type |
| 77 | classify_type (struct type *elttype, struct gdbarch *gdbarch, |
| 78 | const char **encoding) |
| 79 | { |
| 80 | c_string_type result; |
| 81 | |
| 82 | /* We loop because ELTTYPE may be a typedef, and we want to |
| 83 | successively peel each typedef until we reach a type we |
| 84 | understand. We don't use CHECK_TYPEDEF because that will strip |
| 85 | all typedefs at once -- but in C, wchar_t is itself a typedef, so |
| 86 | that would do the wrong thing. */ |
| 87 | while (elttype) |
| 88 | { |
| 89 | const char *name = elttype->name (); |
| 90 | |
| 91 | if (elttype->code () == TYPE_CODE_CHAR || !name) |
| 92 | { |
| 93 | result = C_CHAR; |
| 94 | goto done; |
| 95 | } |
| 96 | |
| 97 | if (!strcmp (name, "wchar_t")) |
| 98 | { |
| 99 | result = C_WIDE_CHAR; |
| 100 | goto done; |
| 101 | } |
| 102 | |
| 103 | if (!strcmp (name, "char16_t")) |
| 104 | { |
| 105 | result = C_CHAR_16; |
| 106 | goto done; |
| 107 | } |
| 108 | |
| 109 | if (!strcmp (name, "char32_t")) |
| 110 | { |
| 111 | result = C_CHAR_32; |
| 112 | goto done; |
| 113 | } |
| 114 | |
| 115 | if (elttype->code () != TYPE_CODE_TYPEDEF) |
| 116 | break; |
| 117 | |
| 118 | /* Call for side effects. */ |
| 119 | check_typedef (elttype); |
| 120 | |
| 121 | if (TYPE_TARGET_TYPE (elttype)) |
| 122 | elttype = TYPE_TARGET_TYPE (elttype); |
| 123 | else |
| 124 | { |
| 125 | /* Perhaps check_typedef did not update the target type. In |
| 126 | this case, force the lookup again and hope it works out. |
| 127 | It never will for C, but it might for C++. */ |
| 128 | elttype = check_typedef (elttype); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* Punt. */ |
| 133 | result = C_CHAR; |
| 134 | |
| 135 | done: |
| 136 | if (encoding) |
| 137 | *encoding = charset_for_string_type (result, gdbarch); |
| 138 | |
| 139 | return result; |
| 140 | } |
| 141 | |
| 142 | /* Print the character C on STREAM as part of the contents of a |
| 143 | literal string whose delimiter is QUOTER. Note that that format |
| 144 | for printing characters and strings is language specific. */ |
| 145 | |
| 146 | void |
| 147 | c_emit_char (int c, struct type *type, |
| 148 | struct ui_file *stream, int quoter) |
| 149 | { |
| 150 | const char *encoding; |
| 151 | |
| 152 | classify_type (type, get_type_arch (type), &encoding); |
| 153 | generic_emit_char (c, type, stream, quoter, encoding); |
| 154 | } |
| 155 | |
| 156 | void |
| 157 | c_printchar (int c, struct type *type, struct ui_file *stream) |
| 158 | { |
| 159 | c_string_type str_type; |
| 160 | |
| 161 | str_type = classify_type (type, get_type_arch (type), NULL); |
| 162 | switch (str_type) |
| 163 | { |
| 164 | case C_CHAR: |
| 165 | break; |
| 166 | case C_WIDE_CHAR: |
| 167 | fputc_filtered ('L', stream); |
| 168 | break; |
| 169 | case C_CHAR_16: |
| 170 | fputc_filtered ('u', stream); |
| 171 | break; |
| 172 | case C_CHAR_32: |
| 173 | fputc_filtered ('U', stream); |
| 174 | break; |
| 175 | } |
| 176 | |
| 177 | fputc_filtered ('\'', stream); |
| 178 | LA_EMIT_CHAR (c, type, stream, '\''); |
| 179 | fputc_filtered ('\'', stream); |
| 180 | } |
| 181 | |
| 182 | /* Print the character string STRING, printing at most LENGTH |
| 183 | characters. LENGTH is -1 if the string is nul terminated. Each |
| 184 | character is WIDTH bytes long. Printing stops early if the number |
| 185 | hits print_max; repeat counts are printed as appropriate. Print |
| 186 | ellipses at the end if we had to stop before printing LENGTH |
| 187 | characters, or if FORCE_ELLIPSES. */ |
| 188 | |
| 189 | void |
| 190 | c_printstr (struct ui_file *stream, struct type *type, |
| 191 | const gdb_byte *string, unsigned int length, |
| 192 | const char *user_encoding, int force_ellipses, |
| 193 | const struct value_print_options *options) |
| 194 | { |
| 195 | c_string_type str_type; |
| 196 | const char *type_encoding; |
| 197 | const char *encoding; |
| 198 | |
| 199 | str_type = (classify_type (type, get_type_arch (type), &type_encoding) |
| 200 | & ~C_CHAR); |
| 201 | switch (str_type) |
| 202 | { |
| 203 | case C_STRING: |
| 204 | break; |
| 205 | case C_WIDE_STRING: |
| 206 | fputs_filtered ("L", stream); |
| 207 | break; |
| 208 | case C_STRING_16: |
| 209 | fputs_filtered ("u", stream); |
| 210 | break; |
| 211 | case C_STRING_32: |
| 212 | fputs_filtered ("U", stream); |
| 213 | break; |
| 214 | } |
| 215 | |
| 216 | encoding = (user_encoding && *user_encoding) ? user_encoding : type_encoding; |
| 217 | |
| 218 | generic_printstr (stream, type, string, length, encoding, force_ellipses, |
| 219 | '"', 1, options); |
| 220 | } |
| 221 | |
| 222 | /* Obtain a C string from the inferior storing it in a newly allocated |
| 223 | buffer in BUFFER, which should be freed by the caller. If the in- |
| 224 | and out-parameter *LENGTH is specified at -1, the string is read |
| 225 | until a null character of the appropriate width is found, otherwise |
| 226 | the string is read to the length of characters specified. The size |
| 227 | of a character is determined by the length of the target type of |
| 228 | the pointer or array. |
| 229 | |
| 230 | If VALUE is an array with a known length, and *LENGTH is -1, |
| 231 | the function will not read past the end of the array. However, any |
| 232 | declared size of the array is ignored if *LENGTH > 0. |
| 233 | |
| 234 | On completion, *LENGTH will be set to the size of the string read in |
| 235 | characters. (If a length of -1 is specified, the length returned |
| 236 | will not include the null character). CHARSET is always set to the |
| 237 | target charset. */ |
| 238 | |
| 239 | void |
| 240 | c_get_string (struct value *value, gdb::unique_xmalloc_ptr<gdb_byte> *buffer, |
| 241 | int *length, struct type **char_type, |
| 242 | const char **charset) |
| 243 | { |
| 244 | int err, width; |
| 245 | unsigned int fetchlimit; |
| 246 | struct type *type = check_typedef (value_type (value)); |
| 247 | struct type *element_type = TYPE_TARGET_TYPE (type); |
| 248 | int req_length = *length; |
| 249 | enum bfd_endian byte_order |
| 250 | = type_byte_order (type); |
| 251 | |
| 252 | if (element_type == NULL) |
| 253 | goto error; |
| 254 | |
| 255 | if (type->code () == TYPE_CODE_ARRAY) |
| 256 | { |
| 257 | /* If we know the size of the array, we can use it as a limit on |
| 258 | the number of characters to be fetched. */ |
| 259 | if (type->num_fields () == 1 |
| 260 | && type->field (0).type ()->code () == TYPE_CODE_RANGE) |
| 261 | { |
| 262 | LONGEST low_bound, high_bound; |
| 263 | |
| 264 | get_discrete_bounds (type->field (0).type (), |
| 265 | &low_bound, &high_bound); |
| 266 | fetchlimit = high_bound - low_bound + 1; |
| 267 | } |
| 268 | else |
| 269 | fetchlimit = UINT_MAX; |
| 270 | } |
| 271 | else if (type->code () == TYPE_CODE_PTR) |
| 272 | fetchlimit = UINT_MAX; |
| 273 | else |
| 274 | /* We work only with arrays and pointers. */ |
| 275 | goto error; |
| 276 | |
| 277 | if (! c_textual_element_type (element_type, 0)) |
| 278 | goto error; |
| 279 | classify_type (element_type, get_type_arch (element_type), charset); |
| 280 | width = TYPE_LENGTH (element_type); |
| 281 | |
| 282 | /* If the string lives in GDB's memory instead of the inferior's, |
| 283 | then we just need to copy it to BUFFER. Also, since such strings |
| 284 | are arrays with known size, FETCHLIMIT will hold the size of the |
| 285 | array. |
| 286 | |
| 287 | An array is assumed to live in GDB's memory, so we take this path |
| 288 | here. |
| 289 | |
| 290 | However, it's possible for the caller to request more array |
| 291 | elements than apparently exist -- this can happen when using the |
| 292 | C struct hack. So, only do this if either no length was |
| 293 | specified, or the length is within the existing bounds. This |
| 294 | avoids running off the end of the value's contents. */ |
| 295 | if ((VALUE_LVAL (value) == not_lval |
| 296 | || VALUE_LVAL (value) == lval_internalvar |
| 297 | || type->code () == TYPE_CODE_ARRAY) |
| 298 | && fetchlimit != UINT_MAX |
| 299 | && (*length < 0 || *length <= fetchlimit)) |
| 300 | { |
| 301 | int i; |
| 302 | const gdb_byte *contents = value_contents (value); |
| 303 | |
| 304 | /* If a length is specified, use that. */ |
| 305 | if (*length >= 0) |
| 306 | i = *length; |
| 307 | else |
| 308 | /* Otherwise, look for a null character. */ |
| 309 | for (i = 0; i < fetchlimit; i++) |
| 310 | if (extract_unsigned_integer (contents + i * width, |
| 311 | width, byte_order) == 0) |
| 312 | break; |
| 313 | |
| 314 | /* I is now either a user-defined length, the number of non-null |
| 315 | characters, or FETCHLIMIT. */ |
| 316 | *length = i * width; |
| 317 | buffer->reset ((gdb_byte *) xmalloc (*length)); |
| 318 | memcpy (buffer->get (), contents, *length); |
| 319 | err = 0; |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | /* value_as_address does not return an address for an array when |
| 324 | c_style_arrays is false, so we handle that specially |
| 325 | here. */ |
| 326 | CORE_ADDR addr; |
| 327 | if (type->code () == TYPE_CODE_ARRAY) |
| 328 | { |
| 329 | if (VALUE_LVAL (value) != lval_memory) |
| 330 | error (_("Attempt to take address of value " |
| 331 | "not located in memory.")); |
| 332 | addr = value_address (value); |
| 333 | } |
| 334 | else |
| 335 | addr = value_as_address (value); |
| 336 | |
| 337 | /* Prior to the fix for PR 16196 read_string would ignore fetchlimit |
| 338 | if length > 0. The old "broken" behaviour is the behaviour we want: |
| 339 | The caller may want to fetch 100 bytes from a variable length array |
| 340 | implemented using the common idiom of having an array of length 1 at |
| 341 | the end of a struct. In this case we want to ignore the declared |
| 342 | size of the array. However, it's counterintuitive to implement that |
| 343 | behaviour in read_string: what does fetchlimit otherwise mean if |
| 344 | length > 0. Therefore we implement the behaviour we want here: |
| 345 | If *length > 0, don't specify a fetchlimit. This preserves the |
| 346 | previous behaviour. We could move this check above where we know |
| 347 | whether the array is declared with a fixed size, but we only want |
| 348 | to apply this behaviour when calling read_string. PR 16286. */ |
| 349 | if (*length > 0) |
| 350 | fetchlimit = UINT_MAX; |
| 351 | |
| 352 | err = read_string (addr, *length, width, fetchlimit, |
| 353 | byte_order, buffer, length); |
| 354 | if (err != 0) |
| 355 | memory_error (TARGET_XFER_E_IO, addr); |
| 356 | } |
| 357 | |
| 358 | /* If the LENGTH is specified at -1, we want to return the string |
| 359 | length up to the terminating null character. If an actual length |
| 360 | was specified, we want to return the length of exactly what was |
| 361 | read. */ |
| 362 | if (req_length == -1) |
| 363 | /* If the last character is null, subtract it from LENGTH. */ |
| 364 | if (*length > 0 |
| 365 | && extract_unsigned_integer (buffer->get () + *length - width, |
| 366 | width, byte_order) == 0) |
| 367 | *length -= width; |
| 368 | |
| 369 | /* The read_string function will return the number of bytes read. |
| 370 | If length returned from read_string was > 0, return the number of |
| 371 | characters read by dividing the number of bytes by width. */ |
| 372 | if (*length != 0) |
| 373 | *length = *length / width; |
| 374 | |
| 375 | *char_type = element_type; |
| 376 | |
| 377 | return; |
| 378 | |
| 379 | error: |
| 380 | { |
| 381 | std::string type_str = type_to_string (type); |
| 382 | if (!type_str.empty ()) |
| 383 | { |
| 384 | error (_("Trying to read string with inappropriate type `%s'."), |
| 385 | type_str.c_str ()); |
| 386 | } |
| 387 | else |
| 388 | error (_("Trying to read string with inappropriate type.")); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | \f |
| 393 | /* Evaluating C and C++ expressions. */ |
| 394 | |
| 395 | /* Convert a UCN. The digits of the UCN start at P and extend no |
| 396 | farther than LIMIT. DEST_CHARSET is the name of the character set |
| 397 | into which the UCN should be converted. The results are written to |
| 398 | OUTPUT. LENGTH is the maximum length of the UCN, either 4 or 8. |
| 399 | Returns a pointer to just after the final digit of the UCN. */ |
| 400 | |
| 401 | static const char * |
| 402 | convert_ucn (const char *p, const char *limit, const char *dest_charset, |
| 403 | struct obstack *output, int length) |
| 404 | { |
| 405 | unsigned long result = 0; |
| 406 | gdb_byte data[4]; |
| 407 | int i; |
| 408 | |
| 409 | for (i = 0; i < length && p < limit && ISXDIGIT (*p); ++i, ++p) |
| 410 | result = (result << 4) + host_hex_value (*p); |
| 411 | |
| 412 | for (i = 3; i >= 0; --i) |
| 413 | { |
| 414 | data[i] = result & 0xff; |
| 415 | result >>= 8; |
| 416 | } |
| 417 | |
| 418 | convert_between_encodings ("UTF-32BE", dest_charset, data, |
| 419 | 4, 4, output, translit_none); |
| 420 | |
| 421 | return p; |
| 422 | } |
| 423 | |
| 424 | /* Emit a character, VALUE, which was specified numerically, to |
| 425 | OUTPUT. TYPE is the target character type. */ |
| 426 | |
| 427 | static void |
| 428 | emit_numeric_character (struct type *type, unsigned long value, |
| 429 | struct obstack *output) |
| 430 | { |
| 431 | gdb_byte *buffer; |
| 432 | |
| 433 | buffer = (gdb_byte *) alloca (TYPE_LENGTH (type)); |
| 434 | pack_long (buffer, type, value); |
| 435 | obstack_grow (output, buffer, TYPE_LENGTH (type)); |
| 436 | } |
| 437 | |
| 438 | /* Convert an octal escape sequence. TYPE is the target character |
| 439 | type. The digits of the escape sequence begin at P and extend no |
| 440 | farther than LIMIT. The result is written to OUTPUT. Returns a |
| 441 | pointer to just after the final digit of the escape sequence. */ |
| 442 | |
| 443 | static const char * |
| 444 | convert_octal (struct type *type, const char *p, |
| 445 | const char *limit, struct obstack *output) |
| 446 | { |
| 447 | int i; |
| 448 | unsigned long value = 0; |
| 449 | |
| 450 | for (i = 0; |
| 451 | i < 3 && p < limit && ISDIGIT (*p) && *p != '8' && *p != '9'; |
| 452 | ++i) |
| 453 | { |
| 454 | value = 8 * value + host_hex_value (*p); |
| 455 | ++p; |
| 456 | } |
| 457 | |
| 458 | emit_numeric_character (type, value, output); |
| 459 | |
| 460 | return p; |
| 461 | } |
| 462 | |
| 463 | /* Convert a hex escape sequence. TYPE is the target character type. |
| 464 | The digits of the escape sequence begin at P and extend no farther |
| 465 | than LIMIT. The result is written to OUTPUT. Returns a pointer to |
| 466 | just after the final digit of the escape sequence. */ |
| 467 | |
| 468 | static const char * |
| 469 | convert_hex (struct type *type, const char *p, |
| 470 | const char *limit, struct obstack *output) |
| 471 | { |
| 472 | unsigned long value = 0; |
| 473 | |
| 474 | while (p < limit && ISXDIGIT (*p)) |
| 475 | { |
| 476 | value = 16 * value + host_hex_value (*p); |
| 477 | ++p; |
| 478 | } |
| 479 | |
| 480 | emit_numeric_character (type, value, output); |
| 481 | |
| 482 | return p; |
| 483 | } |
| 484 | |
| 485 | #define ADVANCE \ |
| 486 | do { \ |
| 487 | ++p; \ |
| 488 | if (p == limit) \ |
| 489 | error (_("Malformed escape sequence")); \ |
| 490 | } while (0) |
| 491 | |
| 492 | /* Convert an escape sequence to a target format. TYPE is the target |
| 493 | character type to use, and DEST_CHARSET is the name of the target |
| 494 | character set. The backslash of the escape sequence is at *P, and |
| 495 | the escape sequence will not extend past LIMIT. The results are |
| 496 | written to OUTPUT. Returns a pointer to just past the final |
| 497 | character of the escape sequence. */ |
| 498 | |
| 499 | static const char * |
| 500 | convert_escape (struct type *type, const char *dest_charset, |
| 501 | const char *p, const char *limit, struct obstack *output) |
| 502 | { |
| 503 | /* Skip the backslash. */ |
| 504 | ADVANCE; |
| 505 | |
| 506 | switch (*p) |
| 507 | { |
| 508 | case '\\': |
| 509 | obstack_1grow (output, '\\'); |
| 510 | ++p; |
| 511 | break; |
| 512 | |
| 513 | case 'x': |
| 514 | ADVANCE; |
| 515 | if (!ISXDIGIT (*p)) |
| 516 | error (_("\\x used with no following hex digits.")); |
| 517 | p = convert_hex (type, p, limit, output); |
| 518 | break; |
| 519 | |
| 520 | case '0': |
| 521 | case '1': |
| 522 | case '2': |
| 523 | case '3': |
| 524 | case '4': |
| 525 | case '5': |
| 526 | case '6': |
| 527 | case '7': |
| 528 | p = convert_octal (type, p, limit, output); |
| 529 | break; |
| 530 | |
| 531 | case 'u': |
| 532 | case 'U': |
| 533 | { |
| 534 | int length = *p == 'u' ? 4 : 8; |
| 535 | |
| 536 | ADVANCE; |
| 537 | if (!ISXDIGIT (*p)) |
| 538 | error (_("\\u used with no following hex digits")); |
| 539 | p = convert_ucn (p, limit, dest_charset, output, length); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | return p; |
| 544 | } |
| 545 | |
| 546 | /* Given a single string from a (C-specific) OP_STRING list, convert |
| 547 | it to a target string, handling escape sequences specially. The |
| 548 | output is written to OUTPUT. DATA is the input string, which has |
| 549 | length LEN. DEST_CHARSET is the name of the target character set, |
| 550 | and TYPE is the type of target character to use. */ |
| 551 | |
| 552 | static void |
| 553 | parse_one_string (struct obstack *output, const char *data, int len, |
| 554 | const char *dest_charset, struct type *type) |
| 555 | { |
| 556 | const char *limit; |
| 557 | |
| 558 | limit = data + len; |
| 559 | |
| 560 | while (data < limit) |
| 561 | { |
| 562 | const char *p = data; |
| 563 | |
| 564 | /* Look for next escape, or the end of the input. */ |
| 565 | while (p < limit && *p != '\\') |
| 566 | ++p; |
| 567 | /* If we saw a run of characters, convert them all. */ |
| 568 | if (p > data) |
| 569 | convert_between_encodings (host_charset (), dest_charset, |
| 570 | (const gdb_byte *) data, p - data, 1, |
| 571 | output, translit_none); |
| 572 | /* If we saw an escape, convert it. */ |
| 573 | if (p < limit) |
| 574 | p = convert_escape (type, dest_charset, p, limit, output); |
| 575 | data = p; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | /* Expression evaluator for the C language family. Most operations |
| 580 | are delegated to evaluate_subexp_standard; see that function for a |
| 581 | description of the arguments. */ |
| 582 | |
| 583 | struct value * |
| 584 | evaluate_subexp_c (struct type *expect_type, struct expression *exp, |
| 585 | int *pos, enum noside noside) |
| 586 | { |
| 587 | enum exp_opcode op = exp->elts[*pos].opcode; |
| 588 | |
| 589 | switch (op) |
| 590 | { |
| 591 | case OP_STRING: |
| 592 | { |
| 593 | int oplen, limit; |
| 594 | struct type *type; |
| 595 | struct value *result; |
| 596 | c_string_type dest_type; |
| 597 | const char *dest_charset; |
| 598 | int satisfy_expected = 0; |
| 599 | |
| 600 | auto_obstack output; |
| 601 | |
| 602 | ++*pos; |
| 603 | oplen = longest_to_int (exp->elts[*pos].longconst); |
| 604 | |
| 605 | ++*pos; |
| 606 | limit = *pos + BYTES_TO_EXP_ELEM (oplen + 1); |
| 607 | dest_type = ((enum c_string_type_values) |
| 608 | longest_to_int (exp->elts[*pos].longconst)); |
| 609 | switch (dest_type & ~C_CHAR) |
| 610 | { |
| 611 | case C_STRING: |
| 612 | type = language_string_char_type (exp->language_defn, |
| 613 | exp->gdbarch); |
| 614 | break; |
| 615 | case C_WIDE_STRING: |
| 616 | type = lookup_typename (exp->language_defn, "wchar_t", NULL, 0); |
| 617 | break; |
| 618 | case C_STRING_16: |
| 619 | type = lookup_typename (exp->language_defn, "char16_t", NULL, 0); |
| 620 | break; |
| 621 | case C_STRING_32: |
| 622 | type = lookup_typename (exp->language_defn, "char32_t", NULL, 0); |
| 623 | break; |
| 624 | default: |
| 625 | internal_error (__FILE__, __LINE__, _("unhandled c_string_type")); |
| 626 | } |
| 627 | |
| 628 | /* Ensure TYPE_LENGTH is valid for TYPE. */ |
| 629 | check_typedef (type); |
| 630 | |
| 631 | /* If the caller expects an array of some integral type, |
| 632 | satisfy them. If something odder is expected, rely on the |
| 633 | caller to cast. */ |
| 634 | if (expect_type && expect_type->code () == TYPE_CODE_ARRAY) |
| 635 | { |
| 636 | struct type *element_type |
| 637 | = check_typedef (TYPE_TARGET_TYPE (expect_type)); |
| 638 | |
| 639 | if (element_type->code () == TYPE_CODE_INT |
| 640 | || element_type->code () == TYPE_CODE_CHAR) |
| 641 | { |
| 642 | type = element_type; |
| 643 | satisfy_expected = 1; |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | dest_charset = charset_for_string_type (dest_type, exp->gdbarch); |
| 648 | |
| 649 | ++*pos; |
| 650 | while (*pos < limit) |
| 651 | { |
| 652 | int len; |
| 653 | |
| 654 | len = longest_to_int (exp->elts[*pos].longconst); |
| 655 | |
| 656 | ++*pos; |
| 657 | if (noside != EVAL_SKIP) |
| 658 | parse_one_string (&output, &exp->elts[*pos].string, len, |
| 659 | dest_charset, type); |
| 660 | *pos += BYTES_TO_EXP_ELEM (len); |
| 661 | } |
| 662 | |
| 663 | /* Skip the trailing length and opcode. */ |
| 664 | *pos += 2; |
| 665 | |
| 666 | if (noside == EVAL_SKIP) |
| 667 | { |
| 668 | /* Return a dummy value of the appropriate type. */ |
| 669 | if (expect_type != NULL) |
| 670 | result = allocate_value (expect_type); |
| 671 | else if ((dest_type & C_CHAR) != 0) |
| 672 | result = allocate_value (type); |
| 673 | else |
| 674 | result = value_cstring ("", 0, type); |
| 675 | return result; |
| 676 | } |
| 677 | |
| 678 | if ((dest_type & C_CHAR) != 0) |
| 679 | { |
| 680 | LONGEST value; |
| 681 | |
| 682 | if (obstack_object_size (&output) != TYPE_LENGTH (type)) |
| 683 | error (_("Could not convert character " |
| 684 | "constant to target character set")); |
| 685 | value = unpack_long (type, (gdb_byte *) obstack_base (&output)); |
| 686 | result = value_from_longest (type, value); |
| 687 | } |
| 688 | else |
| 689 | { |
| 690 | int i; |
| 691 | |
| 692 | /* Write the terminating character. */ |
| 693 | for (i = 0; i < TYPE_LENGTH (type); ++i) |
| 694 | obstack_1grow (&output, 0); |
| 695 | |
| 696 | if (satisfy_expected) |
| 697 | { |
| 698 | LONGEST low_bound, high_bound; |
| 699 | int element_size = TYPE_LENGTH (type); |
| 700 | |
| 701 | if (!get_discrete_bounds (expect_type->index_type (), |
| 702 | &low_bound, &high_bound)) |
| 703 | { |
| 704 | low_bound = 0; |
| 705 | high_bound = (TYPE_LENGTH (expect_type) / element_size) - 1; |
| 706 | } |
| 707 | if (obstack_object_size (&output) / element_size |
| 708 | > (high_bound - low_bound + 1)) |
| 709 | error (_("Too many array elements")); |
| 710 | |
| 711 | result = allocate_value (expect_type); |
| 712 | memcpy (value_contents_raw (result), obstack_base (&output), |
| 713 | obstack_object_size (&output)); |
| 714 | } |
| 715 | else |
| 716 | result = value_cstring ((const char *) obstack_base (&output), |
| 717 | obstack_object_size (&output), |
| 718 | type); |
| 719 | } |
| 720 | return result; |
| 721 | } |
| 722 | break; |
| 723 | |
| 724 | default: |
| 725 | break; |
| 726 | } |
| 727 | return evaluate_subexp_standard (expect_type, exp, pos, noside); |
| 728 | } |
| 729 | \f |
| 730 | /* See c-lang.h. */ |
| 731 | |
| 732 | bool |
| 733 | c_is_string_type_p (struct type *type) |
| 734 | { |
| 735 | type = check_typedef (type); |
| 736 | while (type->code () == TYPE_CODE_REF) |
| 737 | { |
| 738 | type = TYPE_TARGET_TYPE (type); |
| 739 | type = check_typedef (type); |
| 740 | } |
| 741 | |
| 742 | switch (type->code ()) |
| 743 | { |
| 744 | case TYPE_CODE_ARRAY: |
| 745 | { |
| 746 | /* See if target type looks like a string. */ |
| 747 | struct type *array_target_type = TYPE_TARGET_TYPE (type); |
| 748 | return (TYPE_LENGTH (type) > 0 |
| 749 | && TYPE_LENGTH (array_target_type) > 0 |
| 750 | && c_textual_element_type (array_target_type, 0)); |
| 751 | } |
| 752 | case TYPE_CODE_STRING: |
| 753 | return true; |
| 754 | case TYPE_CODE_PTR: |
| 755 | { |
| 756 | struct type *element_type = TYPE_TARGET_TYPE (type); |
| 757 | return c_textual_element_type (element_type, 0); |
| 758 | } |
| 759 | default: |
| 760 | break; |
| 761 | } |
| 762 | |
| 763 | return false; |
| 764 | } |
| 765 | |
| 766 | \f |
| 767 | /* Table mapping opcodes into strings for printing operators |
| 768 | and precedences of the operators. */ |
| 769 | |
| 770 | const struct op_print c_op_print_tab[] = |
| 771 | { |
| 772 | {",", BINOP_COMMA, PREC_COMMA, 0}, |
| 773 | {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
| 774 | {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, |
| 775 | {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
| 776 | {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, |
| 777 | {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, |
| 778 | {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, |
| 779 | {"==", BINOP_EQUAL, PREC_EQUAL, 0}, |
| 780 | {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, |
| 781 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, |
| 782 | {">=", BINOP_GEQ, PREC_ORDER, 0}, |
| 783 | {">", BINOP_GTR, PREC_ORDER, 0}, |
| 784 | {"<", BINOP_LESS, PREC_ORDER, 0}, |
| 785 | {">>", BINOP_RSH, PREC_SHIFT, 0}, |
| 786 | {"<<", BINOP_LSH, PREC_SHIFT, 0}, |
| 787 | {"+", BINOP_ADD, PREC_ADD, 0}, |
| 788 | {"-", BINOP_SUB, PREC_ADD, 0}, |
| 789 | {"*", BINOP_MUL, PREC_MUL, 0}, |
| 790 | {"/", BINOP_DIV, PREC_MUL, 0}, |
| 791 | {"%", BINOP_REM, PREC_MUL, 0}, |
| 792 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, |
| 793 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, |
| 794 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
| 795 | {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, |
| 796 | {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, |
| 797 | {"*", UNOP_IND, PREC_PREFIX, 0}, |
| 798 | {"&", UNOP_ADDR, PREC_PREFIX, 0}, |
| 799 | {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0}, |
| 800 | {"alignof ", UNOP_ALIGNOF, PREC_PREFIX, 0}, |
| 801 | {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, |
| 802 | {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, |
| 803 | {NULL, OP_NULL, PREC_PREFIX, 0} |
| 804 | }; |
| 805 | \f |
| 806 | |
| 807 | void |
| 808 | c_language_arch_info (struct gdbarch *gdbarch, |
| 809 | struct language_arch_info *lai) |
| 810 | { |
| 811 | const struct builtin_type *builtin = builtin_type (gdbarch); |
| 812 | |
| 813 | /* Helper function to allow shorter lines below. */ |
| 814 | auto add = [&] (struct type * t) |
| 815 | { |
| 816 | lai->add_primitive_type (t); |
| 817 | }; |
| 818 | |
| 819 | add (builtin->builtin_int); |
| 820 | add (builtin->builtin_long); |
| 821 | add (builtin->builtin_short); |
| 822 | add (builtin->builtin_char); |
| 823 | add (builtin->builtin_float); |
| 824 | add (builtin->builtin_double); |
| 825 | add (builtin->builtin_void); |
| 826 | add (builtin->builtin_long_long); |
| 827 | add (builtin->builtin_signed_char); |
| 828 | add (builtin->builtin_unsigned_char); |
| 829 | add (builtin->builtin_unsigned_short); |
| 830 | add (builtin->builtin_unsigned_int); |
| 831 | add (builtin->builtin_unsigned_long); |
| 832 | add (builtin->builtin_unsigned_long_long); |
| 833 | add (builtin->builtin_long_double); |
| 834 | add (builtin->builtin_complex); |
| 835 | add (builtin->builtin_double_complex); |
| 836 | add (builtin->builtin_decfloat); |
| 837 | add (builtin->builtin_decdouble); |
| 838 | add (builtin->builtin_declong); |
| 839 | |
| 840 | lai->set_string_char_type (builtin->builtin_char); |
| 841 | lai->set_bool_type (builtin->builtin_int); |
| 842 | } |
| 843 | |
| 844 | const struct exp_descriptor exp_descriptor_c = |
| 845 | { |
| 846 | print_subexp_standard, |
| 847 | operator_length_standard, |
| 848 | operator_check_standard, |
| 849 | dump_subexp_body_standard, |
| 850 | evaluate_subexp_c |
| 851 | }; |
| 852 | |
| 853 | /* Class representing the C language. */ |
| 854 | |
| 855 | class c_language : public language_defn |
| 856 | { |
| 857 | public: |
| 858 | c_language () |
| 859 | : language_defn (language_c) |
| 860 | { /* Nothing. */ } |
| 861 | |
| 862 | /* See language.h. */ |
| 863 | |
| 864 | const char *name () const override |
| 865 | { return "c"; } |
| 866 | |
| 867 | /* See language.h. */ |
| 868 | |
| 869 | const char *natural_name () const override |
| 870 | { return "C"; } |
| 871 | |
| 872 | /* See language.h. */ |
| 873 | |
| 874 | const std::vector<const char *> &filename_extensions () const override |
| 875 | { |
| 876 | static const std::vector<const char *> extensions = { ".c" }; |
| 877 | return extensions; |
| 878 | } |
| 879 | |
| 880 | /* See language.h. */ |
| 881 | void language_arch_info (struct gdbarch *gdbarch, |
| 882 | struct language_arch_info *lai) const override |
| 883 | { |
| 884 | c_language_arch_info (gdbarch, lai); |
| 885 | } |
| 886 | |
| 887 | /* See language.h. */ |
| 888 | compile_instance *get_compile_instance () const override |
| 889 | { |
| 890 | return c_get_compile_context (); |
| 891 | } |
| 892 | |
| 893 | /* See language.h. */ |
| 894 | std::string compute_program (compile_instance *inst, |
| 895 | const char *input, |
| 896 | struct gdbarch *gdbarch, |
| 897 | const struct block *expr_block, |
| 898 | CORE_ADDR expr_pc) const override |
| 899 | { |
| 900 | return c_compute_program (inst, input, gdbarch, expr_block, expr_pc); |
| 901 | } |
| 902 | |
| 903 | /* See language.h. */ |
| 904 | |
| 905 | void print_type (struct type *type, const char *varstring, |
| 906 | struct ui_file *stream, int show, int level, |
| 907 | const struct type_print_options *flags) const override |
| 908 | { |
| 909 | c_print_type (type, varstring, stream, show, level, flags); |
| 910 | } |
| 911 | |
| 912 | /* See language.h. */ |
| 913 | |
| 914 | bool store_sym_names_in_linkage_form_p () const override |
| 915 | { return true; } |
| 916 | |
| 917 | /* See language.h. */ |
| 918 | |
| 919 | enum macro_expansion macro_expansion () const override |
| 920 | { return macro_expansion_c; } |
| 921 | |
| 922 | /* See language.h. */ |
| 923 | |
| 924 | const struct exp_descriptor *expression_ops () const override |
| 925 | { return &exp_descriptor_c; } |
| 926 | |
| 927 | /* See language.h. */ |
| 928 | |
| 929 | const struct op_print *opcode_print_table () const override |
| 930 | { return c_op_print_tab; } |
| 931 | }; |
| 932 | |
| 933 | /* Single instance of the C language class. */ |
| 934 | |
| 935 | static c_language c_language_defn; |
| 936 | |
| 937 | /* A class for the C++ language. */ |
| 938 | |
| 939 | class cplus_language : public language_defn |
| 940 | { |
| 941 | public: |
| 942 | cplus_language () |
| 943 | : language_defn (language_cplus) |
| 944 | { /* Nothing. */ } |
| 945 | |
| 946 | /* See language.h. */ |
| 947 | |
| 948 | const char *name () const override |
| 949 | { return "c++"; } |
| 950 | |
| 951 | /* See language.h. */ |
| 952 | |
| 953 | const char *natural_name () const override |
| 954 | { return "C++"; } |
| 955 | |
| 956 | /* See language.h. */ |
| 957 | |
| 958 | const std::vector<const char *> &filename_extensions () const override |
| 959 | { |
| 960 | static const std::vector<const char *> extensions |
| 961 | = { ".C", ".cc", ".cp", ".cpp", ".cxx", ".c++" }; |
| 962 | return extensions; |
| 963 | } |
| 964 | |
| 965 | /* See language.h. */ |
| 966 | |
| 967 | struct language_pass_by_ref_info pass_by_reference_info |
| 968 | (struct type *type) const override |
| 969 | { |
| 970 | return cp_pass_by_reference (type); |
| 971 | } |
| 972 | |
| 973 | /* See language.h. */ |
| 974 | void language_arch_info (struct gdbarch *gdbarch, |
| 975 | struct language_arch_info *lai) const override |
| 976 | { |
| 977 | const struct builtin_type *builtin = builtin_type (gdbarch); |
| 978 | |
| 979 | /* Helper function to allow shorter lines below. */ |
| 980 | auto add = [&] (struct type * t) |
| 981 | { |
| 982 | lai->add_primitive_type (t); |
| 983 | }; |
| 984 | |
| 985 | add (builtin->builtin_int); |
| 986 | add (builtin->builtin_long); |
| 987 | add (builtin->builtin_short); |
| 988 | add (builtin->builtin_char); |
| 989 | add (builtin->builtin_float); |
| 990 | add (builtin->builtin_double); |
| 991 | add (builtin->builtin_void); |
| 992 | add (builtin->builtin_long_long); |
| 993 | add (builtin->builtin_signed_char); |
| 994 | add (builtin->builtin_unsigned_char); |
| 995 | add (builtin->builtin_unsigned_short); |
| 996 | add (builtin->builtin_unsigned_int); |
| 997 | add (builtin->builtin_unsigned_long); |
| 998 | add (builtin->builtin_unsigned_long_long); |
| 999 | add (builtin->builtin_long_double); |
| 1000 | add (builtin->builtin_complex); |
| 1001 | add (builtin->builtin_double_complex); |
| 1002 | add (builtin->builtin_bool); |
| 1003 | add (builtin->builtin_decfloat); |
| 1004 | add (builtin->builtin_decdouble); |
| 1005 | add (builtin->builtin_declong); |
| 1006 | add (builtin->builtin_char16); |
| 1007 | add (builtin->builtin_char32); |
| 1008 | add (builtin->builtin_wchar); |
| 1009 | |
| 1010 | lai->set_string_char_type (builtin->builtin_char); |
| 1011 | lai->set_bool_type (builtin->builtin_bool, "bool"); |
| 1012 | } |
| 1013 | |
| 1014 | /* See language.h. */ |
| 1015 | struct type *lookup_transparent_type (const char *name) const override |
| 1016 | { |
| 1017 | return cp_lookup_transparent_type (name); |
| 1018 | } |
| 1019 | |
| 1020 | /* See language.h. */ |
| 1021 | compile_instance *get_compile_instance () const override |
| 1022 | { |
| 1023 | return cplus_get_compile_context (); |
| 1024 | } |
| 1025 | |
| 1026 | /* See language.h. */ |
| 1027 | std::string compute_program (compile_instance *inst, |
| 1028 | const char *input, |
| 1029 | struct gdbarch *gdbarch, |
| 1030 | const struct block *expr_block, |
| 1031 | CORE_ADDR expr_pc) const override |
| 1032 | { |
| 1033 | return cplus_compute_program (inst, input, gdbarch, expr_block, expr_pc); |
| 1034 | } |
| 1035 | |
| 1036 | /* See language.h. */ |
| 1037 | unsigned int search_name_hash (const char *name) const override |
| 1038 | { |
| 1039 | return cp_search_name_hash (name); |
| 1040 | } |
| 1041 | |
| 1042 | /* See language.h. */ |
| 1043 | bool sniff_from_mangled_name (const char *mangled, |
| 1044 | char **demangled) const override |
| 1045 | { |
| 1046 | *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); |
| 1047 | return *demangled != NULL; |
| 1048 | } |
| 1049 | |
| 1050 | /* See language.h. */ |
| 1051 | |
| 1052 | char *demangle_symbol (const char *mangled, int options) const override |
| 1053 | { |
| 1054 | return gdb_demangle (mangled, options); |
| 1055 | } |
| 1056 | |
| 1057 | /* See language.h. */ |
| 1058 | |
| 1059 | void print_type (struct type *type, const char *varstring, |
| 1060 | struct ui_file *stream, int show, int level, |
| 1061 | const struct type_print_options *flags) const override |
| 1062 | { |
| 1063 | c_print_type (type, varstring, stream, show, level, flags); |
| 1064 | } |
| 1065 | |
| 1066 | /* See language.h. */ |
| 1067 | |
| 1068 | CORE_ADDR skip_trampoline (struct frame_info *fi, |
| 1069 | CORE_ADDR pc) const override |
| 1070 | { |
| 1071 | return cplus_skip_trampoline (fi, pc); |
| 1072 | } |
| 1073 | |
| 1074 | /* See language.h. */ |
| 1075 | |
| 1076 | char *class_name_from_physname (const char *physname) const override |
| 1077 | { |
| 1078 | return cp_class_name_from_physname (physname); |
| 1079 | } |
| 1080 | |
| 1081 | /* See language.h. */ |
| 1082 | |
| 1083 | struct block_symbol lookup_symbol_nonlocal |
| 1084 | (const char *name, const struct block *block, |
| 1085 | const domain_enum domain) const override |
| 1086 | { |
| 1087 | return cp_lookup_symbol_nonlocal (this, name, block, domain); |
| 1088 | } |
| 1089 | |
| 1090 | /* See language.h. */ |
| 1091 | |
| 1092 | const char *name_of_this () const override |
| 1093 | { return "this"; } |
| 1094 | |
| 1095 | /* See language.h. */ |
| 1096 | |
| 1097 | enum macro_expansion macro_expansion () const override |
| 1098 | { return macro_expansion_c; } |
| 1099 | |
| 1100 | /* See language.h. */ |
| 1101 | |
| 1102 | const struct lang_varobj_ops *varobj_ops () const override |
| 1103 | { return &cplus_varobj_ops; } |
| 1104 | |
| 1105 | /* See language.h. */ |
| 1106 | |
| 1107 | const struct exp_descriptor *expression_ops () const override |
| 1108 | { return &exp_descriptor_c; } |
| 1109 | |
| 1110 | /* See language.h. */ |
| 1111 | |
| 1112 | const struct op_print *opcode_print_table () const override |
| 1113 | { return c_op_print_tab; } |
| 1114 | |
| 1115 | protected: |
| 1116 | |
| 1117 | /* See language.h. */ |
| 1118 | |
| 1119 | symbol_name_matcher_ftype *get_symbol_name_matcher_inner |
| 1120 | (const lookup_name_info &lookup_name) const override |
| 1121 | { |
| 1122 | return cp_get_symbol_name_matcher (lookup_name); |
| 1123 | } |
| 1124 | }; |
| 1125 | |
| 1126 | /* The single instance of the C++ language class. */ |
| 1127 | |
| 1128 | static cplus_language cplus_language_defn; |
| 1129 | |
| 1130 | /* A class for the ASM language. */ |
| 1131 | |
| 1132 | class asm_language : public language_defn |
| 1133 | { |
| 1134 | public: |
| 1135 | asm_language () |
| 1136 | : language_defn (language_asm) |
| 1137 | { /* Nothing. */ } |
| 1138 | |
| 1139 | /* See language.h. */ |
| 1140 | |
| 1141 | const char *name () const override |
| 1142 | { return "asm"; } |
| 1143 | |
| 1144 | /* See language.h. */ |
| 1145 | |
| 1146 | const char *natural_name () const override |
| 1147 | { return "Assembly"; } |
| 1148 | |
| 1149 | /* See language.h. */ |
| 1150 | |
| 1151 | const std::vector<const char *> &filename_extensions () const override |
| 1152 | { |
| 1153 | static const std::vector<const char *> extensions |
| 1154 | = { ".s", ".sx", ".S" }; |
| 1155 | return extensions; |
| 1156 | } |
| 1157 | |
| 1158 | /* See language.h. |
| 1159 | |
| 1160 | FIXME: Should this have its own arch info method? */ |
| 1161 | void language_arch_info (struct gdbarch *gdbarch, |
| 1162 | struct language_arch_info *lai) const override |
| 1163 | { |
| 1164 | c_language_arch_info (gdbarch, lai); |
| 1165 | } |
| 1166 | |
| 1167 | /* See language.h. */ |
| 1168 | |
| 1169 | void print_type (struct type *type, const char *varstring, |
| 1170 | struct ui_file *stream, int show, int level, |
| 1171 | const struct type_print_options *flags) const override |
| 1172 | { |
| 1173 | c_print_type (type, varstring, stream, show, level, flags); |
| 1174 | } |
| 1175 | |
| 1176 | /* See language.h. */ |
| 1177 | |
| 1178 | bool store_sym_names_in_linkage_form_p () const override |
| 1179 | { return true; } |
| 1180 | |
| 1181 | /* See language.h. */ |
| 1182 | |
| 1183 | enum macro_expansion macro_expansion () const override |
| 1184 | { return macro_expansion_c; } |
| 1185 | |
| 1186 | /* See language.h. */ |
| 1187 | |
| 1188 | const struct exp_descriptor *expression_ops () const override |
| 1189 | { return &exp_descriptor_c; } |
| 1190 | |
| 1191 | /* See language.h. */ |
| 1192 | |
| 1193 | const struct op_print *opcode_print_table () const override |
| 1194 | { return c_op_print_tab; } |
| 1195 | }; |
| 1196 | |
| 1197 | /* The single instance of the ASM language class. */ |
| 1198 | static asm_language asm_language_defn; |
| 1199 | |
| 1200 | /* A class for the minimal language. This does not represent a real |
| 1201 | language. It just provides a minimal support a-la-C that should allow |
| 1202 | users to do some simple operations when debugging applications that use |
| 1203 | a language currently not supported by GDB. */ |
| 1204 | |
| 1205 | class minimal_language : public language_defn |
| 1206 | { |
| 1207 | public: |
| 1208 | minimal_language () |
| 1209 | : language_defn (language_minimal) |
| 1210 | { /* Nothing. */ } |
| 1211 | |
| 1212 | /* See language.h. */ |
| 1213 | |
| 1214 | const char *name () const override |
| 1215 | { return "minimal"; } |
| 1216 | |
| 1217 | /* See language.h. */ |
| 1218 | |
| 1219 | const char *natural_name () const override |
| 1220 | { return "Minimal"; } |
| 1221 | |
| 1222 | /* See language.h. */ |
| 1223 | void language_arch_info (struct gdbarch *gdbarch, |
| 1224 | struct language_arch_info *lai) const override |
| 1225 | { |
| 1226 | c_language_arch_info (gdbarch, lai); |
| 1227 | } |
| 1228 | |
| 1229 | /* See language.h. */ |
| 1230 | |
| 1231 | void print_type (struct type *type, const char *varstring, |
| 1232 | struct ui_file *stream, int show, int level, |
| 1233 | const struct type_print_options *flags) const override |
| 1234 | { |
| 1235 | c_print_type (type, varstring, stream, show, level, flags); |
| 1236 | } |
| 1237 | |
| 1238 | /* See language.h. */ |
| 1239 | |
| 1240 | bool store_sym_names_in_linkage_form_p () const override |
| 1241 | { return true; } |
| 1242 | |
| 1243 | /* See language.h. */ |
| 1244 | |
| 1245 | enum macro_expansion macro_expansion () const override |
| 1246 | { return macro_expansion_c; } |
| 1247 | |
| 1248 | /* See language.h. */ |
| 1249 | |
| 1250 | const struct exp_descriptor *expression_ops () const override |
| 1251 | { return &exp_descriptor_c; } |
| 1252 | |
| 1253 | /* See language.h. */ |
| 1254 | |
| 1255 | const struct op_print *opcode_print_table () const override |
| 1256 | { return c_op_print_tab; } |
| 1257 | }; |
| 1258 | |
| 1259 | /* The single instance of the minimal language class. */ |
| 1260 | static minimal_language minimal_language_defn; |