| 1 | /* Chill language support routines for GDB, the GNU debugger. |
| 2 | Copyright 1992 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "symtab.h" |
| 22 | #include "gdbtypes.h" |
| 23 | #include "value.h" |
| 24 | #include "expression.h" |
| 25 | #include "parser-defs.h" |
| 26 | #include "language.h" |
| 27 | #include "ch-lang.h" |
| 28 | |
| 29 | |
| 30 | /* For now, Chill uses a simple mangling algorithm whereby you simply |
| 31 | discard everything after the occurance of two successive CPLUS_MARKER |
| 32 | characters to derive the demangled form. */ |
| 33 | |
| 34 | char * |
| 35 | chill_demangle (mangled) |
| 36 | const char *mangled; |
| 37 | { |
| 38 | char *joiner; |
| 39 | char *demangled; |
| 40 | |
| 41 | joiner = strchr (mangled, CPLUS_MARKER); |
| 42 | if (joiner != NULL && *(joiner + 1) == CPLUS_MARKER) |
| 43 | { |
| 44 | demangled = savestring (mangled, joiner - mangled); |
| 45 | } |
| 46 | else |
| 47 | { |
| 48 | demangled = NULL; |
| 49 | } |
| 50 | return (demangled); |
| 51 | } |
| 52 | |
| 53 | static void |
| 54 | chill_printchar (c, stream) |
| 55 | register int c; |
| 56 | GDB_FILE *stream; |
| 57 | { |
| 58 | c &= 0xFF; /* Avoid sign bit follies */ |
| 59 | |
| 60 | if (PRINT_LITERAL_FORM (c)) |
| 61 | { |
| 62 | fprintf_filtered (stream, "'%c'", c); |
| 63 | } |
| 64 | else |
| 65 | { |
| 66 | fprintf_filtered (stream, "C'%.2x'", (unsigned int) c); |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | /* Print the character string STRING, printing at most LENGTH characters. |
| 71 | Printing stops early if the number hits print_max; repeat counts |
| 72 | are printed as appropriate. Print ellipses at the end if we |
| 73 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. |
| 74 | Note that gdb maintains the length of strings without counting the |
| 75 | terminating null byte, while chill strings are typically written with |
| 76 | an explicit null byte. So we always assume an implied null byte |
| 77 | until gdb is able to maintain non-null terminated strings as well |
| 78 | as null terminated strings (FIXME). |
| 79 | */ |
| 80 | |
| 81 | static void |
| 82 | chill_printstr (stream, string, length, force_ellipses) |
| 83 | GDB_FILE *stream; |
| 84 | char *string; |
| 85 | unsigned int length; |
| 86 | int force_ellipses; |
| 87 | { |
| 88 | register unsigned int i; |
| 89 | unsigned int things_printed = 0; |
| 90 | int in_literal_form = 0; |
| 91 | int in_control_form = 0; |
| 92 | int need_slashslash = 0; |
| 93 | unsigned int c; |
| 94 | extern int repeat_count_threshold; |
| 95 | extern int print_max; |
| 96 | |
| 97 | if (length == 0) |
| 98 | { |
| 99 | fputs_filtered ("\"\"", stream); |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | for (i = 0; i < length && things_printed < print_max; ++i) |
| 104 | { |
| 105 | /* Position of the character we are examining |
| 106 | to see whether it is repeated. */ |
| 107 | unsigned int rep1; |
| 108 | /* Number of repetitions we have detected so far. */ |
| 109 | unsigned int reps; |
| 110 | |
| 111 | QUIT; |
| 112 | |
| 113 | if (need_slashslash) |
| 114 | { |
| 115 | fputs_filtered ("//", stream); |
| 116 | need_slashslash = 0; |
| 117 | } |
| 118 | |
| 119 | rep1 = i + 1; |
| 120 | reps = 1; |
| 121 | while (rep1 < length && string[rep1] == string[i]) |
| 122 | { |
| 123 | ++rep1; |
| 124 | ++reps; |
| 125 | } |
| 126 | |
| 127 | c = string[i]; |
| 128 | if (reps > repeat_count_threshold) |
| 129 | { |
| 130 | if (in_control_form || in_literal_form) |
| 131 | { |
| 132 | fputs_filtered ("\"//", stream); |
| 133 | in_control_form = in_literal_form = 0; |
| 134 | } |
| 135 | chill_printchar (c, stream); |
| 136 | fprintf_filtered (stream, "<repeats %u times>", reps); |
| 137 | i = rep1 - 1; |
| 138 | things_printed += repeat_count_threshold; |
| 139 | need_slashslash = 1; |
| 140 | } |
| 141 | else |
| 142 | { |
| 143 | if (PRINT_LITERAL_FORM (c)) |
| 144 | { |
| 145 | if (!in_literal_form) |
| 146 | { |
| 147 | if (in_control_form) |
| 148 | { |
| 149 | fputs_filtered ("\"//", stream); |
| 150 | in_control_form = 0; |
| 151 | } |
| 152 | fputs_filtered ("\"", stream); |
| 153 | in_literal_form = 1; |
| 154 | } |
| 155 | fprintf_filtered (stream, "%c", c); |
| 156 | } |
| 157 | else |
| 158 | { |
| 159 | if (!in_control_form) |
| 160 | { |
| 161 | if (in_literal_form) |
| 162 | { |
| 163 | fputs_filtered ("\"//", stream); |
| 164 | in_literal_form = 0; |
| 165 | } |
| 166 | fputs_filtered ("c\"", stream); |
| 167 | in_control_form = 1; |
| 168 | } |
| 169 | fprintf_filtered (stream, "%.2x", c); |
| 170 | } |
| 171 | ++things_printed; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /* Terminate the quotes if necessary. */ |
| 176 | if (in_literal_form || in_control_form) |
| 177 | { |
| 178 | fputs_filtered ("\"", stream); |
| 179 | } |
| 180 | if (force_ellipses || (i < length)) |
| 181 | { |
| 182 | fputs_filtered ("...", stream); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | static struct type * |
| 187 | chill_create_fundamental_type (objfile, typeid) |
| 188 | struct objfile *objfile; |
| 189 | int typeid; |
| 190 | { |
| 191 | register struct type *type = NULL; |
| 192 | |
| 193 | switch (typeid) |
| 194 | { |
| 195 | default: |
| 196 | /* FIXME: For now, if we are asked to produce a type not in this |
| 197 | language, create the equivalent of a C integer type with the |
| 198 | name "<?type?>". When all the dust settles from the type |
| 199 | reconstruction work, this should probably become an error. */ |
| 200 | type = init_type (TYPE_CODE_INT, 2, 0, "<?type?>", objfile); |
| 201 | warning ("internal error: no chill fundamental type %d", typeid); |
| 202 | break; |
| 203 | case FT_VOID: |
| 204 | /* FIXME: Currently the GNU Chill compiler emits some DWARF entries for |
| 205 | typedefs, unrelated to anything directly in the code being compiled, |
| 206 | that have some FT_VOID types. Just fake it for now. */ |
| 207 | type = init_type (TYPE_CODE_VOID, 0, 0, "<?VOID?>", objfile); |
| 208 | break; |
| 209 | case FT_BOOLEAN: |
| 210 | type = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile); |
| 211 | break; |
| 212 | case FT_CHAR: |
| 213 | type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "CHAR", objfile); |
| 214 | break; |
| 215 | case FT_SIGNED_CHAR: |
| 216 | type = init_type (TYPE_CODE_INT, 1, 0, "BYTE", objfile); |
| 217 | break; |
| 218 | case FT_UNSIGNED_CHAR: |
| 219 | type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile); |
| 220 | break; |
| 221 | case FT_SHORT: /* Chill ints are 2 bytes */ |
| 222 | type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile); |
| 223 | break; |
| 224 | case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */ |
| 225 | type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile); |
| 226 | break; |
| 227 | case FT_INTEGER: /* FIXME? */ |
| 228 | case FT_SIGNED_INTEGER: /* FIXME? */ |
| 229 | case FT_LONG: /* Chill longs are 4 bytes */ |
| 230 | case FT_SIGNED_LONG: /* Chill longs are 4 bytes */ |
| 231 | type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile); |
| 232 | break; |
| 233 | case FT_UNSIGNED_INTEGER: /* FIXME? */ |
| 234 | case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */ |
| 235 | type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile); |
| 236 | break; |
| 237 | case FT_FLOAT: |
| 238 | type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", objfile); |
| 239 | break; |
| 240 | case FT_DBL_PREC_FLOAT: |
| 241 | type = init_type (TYPE_CODE_FLT, 8, 0, "LONG_REAL", objfile); |
| 242 | break; |
| 243 | } |
| 244 | return (type); |
| 245 | } |
| 246 | |
| 247 | \f |
| 248 | /* Table of operators and their precedences for printing expressions. */ |
| 249 | |
| 250 | static const struct op_print chill_op_print_tab[] = { |
| 251 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
| 252 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, |
| 253 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, |
| 254 | {"MOD", BINOP_MOD, PREC_MUL, 0}, |
| 255 | {"REM", BINOP_REM, PREC_MUL, 0}, |
| 256 | {"SIZE",UNOP_SIZEOF, PREC_BUILTIN_FUNCTION, 0}, |
| 257 | {"LOWER",UNOP_LOWER, PREC_BUILTIN_FUNCTION, 0}, |
| 258 | {"UPPER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0}, |
| 259 | {"LOWER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0}, |
| 260 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
| 261 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, |
| 262 | {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, |
| 263 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, |
| 264 | {">=", BINOP_GEQ, PREC_ORDER, 0}, |
| 265 | {">", BINOP_GTR, PREC_ORDER, 0}, |
| 266 | {"<", BINOP_LESS, PREC_ORDER, 0}, |
| 267 | {"+", BINOP_ADD, PREC_ADD, 0}, |
| 268 | {"-", BINOP_SUB, PREC_ADD, 0}, |
| 269 | {"*", BINOP_MUL, PREC_MUL, 0}, |
| 270 | {"/", BINOP_DIV, PREC_MUL, 0}, |
| 271 | {"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */ |
| 272 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
| 273 | {"->", UNOP_IND, PREC_SUFFIX, 1}, |
| 274 | {"->", UNOP_ADDR, PREC_PREFIX, 0}, |
| 275 | {NULL, 0, 0, 0} |
| 276 | }; |
| 277 | \f |
| 278 | /* The built-in types of Chill. */ |
| 279 | |
| 280 | struct type *builtin_type_chill_bool; |
| 281 | struct type *builtin_type_chill_char; |
| 282 | struct type *builtin_type_chill_long; |
| 283 | struct type *builtin_type_chill_ulong; |
| 284 | struct type *builtin_type_chill_real; |
| 285 | |
| 286 | struct type ** const (chill_builtin_types[]) = |
| 287 | { |
| 288 | &builtin_type_chill_bool, |
| 289 | &builtin_type_chill_char, |
| 290 | &builtin_type_chill_long, |
| 291 | &builtin_type_chill_ulong, |
| 292 | &builtin_type_chill_real, |
| 293 | 0 |
| 294 | }; |
| 295 | |
| 296 | /* Calculate LOWER or UPPER of TYPE. |
| 297 | Returns the result as an integer. |
| 298 | *RESULT_TYPE is the appropriate type for the result. */ |
| 299 | |
| 300 | LONGEST |
| 301 | type_lower_upper (op, type, result_type) |
| 302 | enum exp_opcode op; /* Either UNOP_LOWER or UNOP_UPPER */ |
| 303 | struct type *type; |
| 304 | struct type **result_type; |
| 305 | { |
| 306 | LONGEST tmp; |
| 307 | *result_type = builtin_type_int; |
| 308 | retry: |
| 309 | switch (TYPE_CODE (type)) |
| 310 | { |
| 311 | case TYPE_CODE_STRUCT: |
| 312 | if (chill_varying_type (type)) |
| 313 | return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type); |
| 314 | break; |
| 315 | case TYPE_CODE_ARRAY: |
| 316 | case TYPE_CODE_BITSTRING: |
| 317 | case TYPE_CODE_STRING: |
| 318 | type = TYPE_FIELD_TYPE (type, 0); /* Get index type */ |
| 319 | |
| 320 | /* ... fall through ... */ |
| 321 | case TYPE_CODE_RANGE: |
| 322 | if (TYPE_DUMMY_RANGE (type) > 0) |
| 323 | return type_lower_upper (op, TYPE_TARGET_TYPE (type), result_type); |
| 324 | *result_type = TYPE_TARGET_TYPE (type); |
| 325 | return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type); |
| 326 | |
| 327 | case TYPE_CODE_ENUM: |
| 328 | *result_type = type; |
| 329 | if (TYPE_NFIELDS (type) > 0) |
| 330 | return TYPE_FIELD_BITPOS (type, |
| 331 | op == UNOP_LOWER ? 0 |
| 332 | : TYPE_NFIELDS (type) - 1); |
| 333 | |
| 334 | case TYPE_CODE_BOOL: |
| 335 | *result_type = type; |
| 336 | return op == UNOP_LOWER ? 0 : 1; |
| 337 | case TYPE_CODE_INT: |
| 338 | case TYPE_CODE_CHAR: |
| 339 | *result_type = type; |
| 340 | tmp = (LONGEST) 1 << (TARGET_CHAR_BIT * TYPE_LENGTH (type)); |
| 341 | if (TYPE_UNSIGNED (type)) |
| 342 | return op == UNOP_LOWER ? 0 : tmp - (LONGEST) 1; |
| 343 | tmp = tmp >> 1; |
| 344 | return op == UNOP_LOWER ? -tmp : (tmp - 1); |
| 345 | } |
| 346 | error ("unknown mode for LOWER/UPPER builtin"); |
| 347 | } |
| 348 | |
| 349 | static value_ptr |
| 350 | value_chill_length (val) |
| 351 | value_ptr val; |
| 352 | { |
| 353 | LONGEST tmp; |
| 354 | struct type *type = VALUE_TYPE (val); |
| 355 | struct type *ttype; |
| 356 | switch (TYPE_CODE (type)) |
| 357 | { |
| 358 | case TYPE_CODE_ARRAY: |
| 359 | case TYPE_CODE_BITSTRING: |
| 360 | case TYPE_CODE_STRING: |
| 361 | tmp = type_lower_upper (UNOP_UPPER, type, &ttype) |
| 362 | - type_lower_upper (UNOP_LOWER, type, &ttype) + 1; |
| 363 | break; |
| 364 | case TYPE_CODE_STRUCT: |
| 365 | if (chill_varying_type (type)) |
| 366 | { |
| 367 | tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val)); |
| 368 | break; |
| 369 | } |
| 370 | /* ... else fall through ... */ |
| 371 | default: |
| 372 | error ("bad argument to LENGTH builtin"); |
| 373 | } |
| 374 | return value_from_longest (builtin_type_int, tmp); |
| 375 | } |
| 376 | |
| 377 | static value_ptr |
| 378 | evaluate_subexp_chill (expect_type, exp, pos, noside) |
| 379 | struct type *expect_type; |
| 380 | register struct expression *exp; |
| 381 | register int *pos; |
| 382 | enum noside noside; |
| 383 | { |
| 384 | int pc = *pos; |
| 385 | struct type *type; |
| 386 | int tem, nargs; |
| 387 | value_ptr arg1; |
| 388 | value_ptr *argvec; |
| 389 | enum exp_opcode op = exp->elts[*pos].opcode; |
| 390 | switch (op) |
| 391 | { |
| 392 | case MULTI_SUBSCRIPT: |
| 393 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) |
| 394 | break; |
| 395 | (*pos) += 3; |
| 396 | nargs = longest_to_int (exp->elts[pc + 1].longconst); |
| 397 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); |
| 398 | |
| 399 | switch (TYPE_CODE (VALUE_TYPE (arg1))) |
| 400 | { |
| 401 | case TYPE_CODE_PTR: |
| 402 | case TYPE_CODE_FUNC: |
| 403 | /* It's a function call. */ |
| 404 | /* Allocate arg vector, including space for the function to be |
| 405 | called in argvec[0] and a terminating NULL */ |
| 406 | argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2)); |
| 407 | argvec[0] = arg1; |
| 408 | tem = 1; |
| 409 | for (; tem <= nargs; tem++) |
| 410 | argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside); |
| 411 | argvec[tem] = 0; /* signal end of arglist */ |
| 412 | |
| 413 | return call_function_by_hand (argvec[0], nargs, argvec + 1); |
| 414 | default: |
| 415 | break; |
| 416 | } |
| 417 | |
| 418 | while (nargs-- > 0) |
| 419 | { |
| 420 | value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside); |
| 421 | arg1 = value_subscript (arg1, index); |
| 422 | } |
| 423 | return (arg1); |
| 424 | |
| 425 | case UNOP_LOWER: |
| 426 | case UNOP_UPPER: |
| 427 | (*pos)++; |
| 428 | if (noside == EVAL_SKIP) |
| 429 | { |
| 430 | (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP); |
| 431 | goto nosideret; |
| 432 | } |
| 433 | arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, |
| 434 | EVAL_AVOID_SIDE_EFFECTS); |
| 435 | tem = type_lower_upper (op, VALUE_TYPE (arg1), &type); |
| 436 | return value_from_longest (type, tem); |
| 437 | |
| 438 | case UNOP_LENGTH: |
| 439 | (*pos)++; |
| 440 | arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside); |
| 441 | return value_chill_length (arg1); |
| 442 | |
| 443 | default: |
| 444 | break; |
| 445 | } |
| 446 | |
| 447 | return evaluate_subexp_standard (expect_type, exp, pos, noside); |
| 448 | nosideret: |
| 449 | return value_from_longest (builtin_type_long, (LONGEST) 1); |
| 450 | } |
| 451 | |
| 452 | const struct language_defn chill_language_defn = { |
| 453 | "chill", |
| 454 | language_chill, |
| 455 | chill_builtin_types, |
| 456 | range_check_on, |
| 457 | type_check_on, |
| 458 | chill_parse, /* parser */ |
| 459 | chill_error, /* parser error function */ |
| 460 | evaluate_subexp_chill, |
| 461 | chill_printchar, /* print a character constant */ |
| 462 | chill_printstr, /* function to print a string constant */ |
| 463 | chill_create_fundamental_type,/* Create fundamental type in this language */ |
| 464 | chill_print_type, /* Print a type using appropriate syntax */ |
| 465 | chill_val_print, /* Print a value using appropriate syntax */ |
| 466 | chill_value_print, /* Print a top-levl value */ |
| 467 | {"", "B'", "", ""}, /* Binary format info */ |
| 468 | {"O'%lo", "O'", "o", ""}, /* Octal format info */ |
| 469 | {"D'%ld", "D'", "d", ""}, /* Decimal format info */ |
| 470 | {"H'%lx", "H'", "x", ""}, /* Hex format info */ |
| 471 | chill_op_print_tab, /* expression operators for printing */ |
| 472 | 0, /* arrays are first-class (not c-style) */ |
| 473 | 0, /* String lower bound */ |
| 474 | &builtin_type_chill_char, /* Type of string elements */ |
| 475 | LANG_MAGIC |
| 476 | }; |
| 477 | |
| 478 | /* Initialization for Chill */ |
| 479 | |
| 480 | void |
| 481 | _initialize_chill_language () |
| 482 | { |
| 483 | builtin_type_chill_bool = |
| 484 | init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 485 | TYPE_FLAG_UNSIGNED, |
| 486 | "BOOL", (struct objfile *) NULL); |
| 487 | builtin_type_chill_char = |
| 488 | init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 489 | TYPE_FLAG_UNSIGNED, |
| 490 | "CHAR", (struct objfile *) NULL); |
| 491 | builtin_type_chill_long = |
| 492 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 493 | 0, |
| 494 | "LONG", (struct objfile *) NULL); |
| 495 | builtin_type_chill_ulong = |
| 496 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 497 | TYPE_FLAG_UNSIGNED, |
| 498 | "ULONG", (struct objfile *) NULL); |
| 499 | builtin_type_chill_real = |
| 500 | init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 501 | 0, |
| 502 | "LONG_REAL", (struct objfile *) NULL); |
| 503 | |
| 504 | add_language (&chill_language_defn); |
| 505 | } |