| 1 | /* Support routines for manipulating internal types for GDB. |
| 2 | Copyright (C) 1992 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include <string.h> |
| 23 | #include "bfd.h" |
| 24 | #include "symtab.h" |
| 25 | #include "symfile.h" |
| 26 | #include "objfiles.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "expression.h" |
| 29 | #include "language.h" |
| 30 | #include "target.h" |
| 31 | #include "value.h" |
| 32 | #include "demangle.h" |
| 33 | #include "complaints.h" |
| 34 | |
| 35 | /* These variables point to the objects |
| 36 | representing the predefined C data types. */ |
| 37 | |
| 38 | struct type *builtin_type_void; |
| 39 | struct type *builtin_type_char; |
| 40 | struct type *builtin_type_short; |
| 41 | struct type *builtin_type_int; |
| 42 | struct type *builtin_type_long; |
| 43 | struct type *builtin_type_long_long; |
| 44 | struct type *builtin_type_signed_char; |
| 45 | struct type *builtin_type_unsigned_char; |
| 46 | struct type *builtin_type_unsigned_short; |
| 47 | struct type *builtin_type_unsigned_int; |
| 48 | struct type *builtin_type_unsigned_long; |
| 49 | struct type *builtin_type_unsigned_long_long; |
| 50 | struct type *builtin_type_float; |
| 51 | struct type *builtin_type_double; |
| 52 | struct type *builtin_type_long_double; |
| 53 | struct type *builtin_type_complex; |
| 54 | struct type *builtin_type_double_complex; |
| 55 | struct type *builtin_type_string; |
| 56 | |
| 57 | /* Alloc a new type structure and fill it with some defaults. If |
| 58 | OBJFILE is non-NULL, then allocate the space for the type structure |
| 59 | in that objfile's type_obstack. */ |
| 60 | |
| 61 | struct type * |
| 62 | alloc_type (objfile) |
| 63 | struct objfile *objfile; |
| 64 | { |
| 65 | register struct type *type; |
| 66 | |
| 67 | /* Alloc the structure and start off with all fields zeroed. */ |
| 68 | |
| 69 | if (objfile == NULL) |
| 70 | { |
| 71 | type = (struct type *) xmalloc (sizeof (struct type)); |
| 72 | } |
| 73 | else |
| 74 | { |
| 75 | type = (struct type *) obstack_alloc (&objfile -> type_obstack, |
| 76 | sizeof (struct type)); |
| 77 | } |
| 78 | memset ((char *) type, 0, sizeof (struct type)); |
| 79 | |
| 80 | /* Initialize the fields that might not be zero. */ |
| 81 | |
| 82 | TYPE_CODE (type) = TYPE_CODE_UNDEF; |
| 83 | TYPE_OBJFILE (type) = objfile; |
| 84 | TYPE_VPTR_FIELDNO (type) = -1; |
| 85 | |
| 86 | return (type); |
| 87 | } |
| 88 | |
| 89 | /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points |
| 90 | to a pointer to memory where the pointer type should be stored. |
| 91 | If *TYPEPTR is zero, update it to point to the pointer type we return. |
| 92 | We allocate new memory if needed. */ |
| 93 | |
| 94 | struct type * |
| 95 | make_pointer_type (type, typeptr) |
| 96 | struct type *type; |
| 97 | struct type **typeptr; |
| 98 | { |
| 99 | register struct type *ntype; /* New type */ |
| 100 | struct objfile *objfile; |
| 101 | |
| 102 | ntype = TYPE_POINTER_TYPE (type); |
| 103 | |
| 104 | if (ntype) |
| 105 | if (typeptr == 0) |
| 106 | return ntype; /* Don't care about alloc, and have new type. */ |
| 107 | else if (*typeptr == 0) |
| 108 | { |
| 109 | *typeptr = ntype; /* Tracking alloc, and we have new type. */ |
| 110 | return ntype; |
| 111 | } |
| 112 | |
| 113 | if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */ |
| 114 | { |
| 115 | ntype = alloc_type (TYPE_OBJFILE (type)); |
| 116 | if (typeptr) |
| 117 | *typeptr = ntype; |
| 118 | } |
| 119 | else /* We have storage, but need to reset it. */ |
| 120 | { |
| 121 | ntype = *typeptr; |
| 122 | objfile = TYPE_OBJFILE (ntype); |
| 123 | memset ((char *) ntype, 0, sizeof (struct type)); |
| 124 | TYPE_OBJFILE (ntype) = objfile; |
| 125 | } |
| 126 | |
| 127 | TYPE_TARGET_TYPE (ntype) = type; |
| 128 | TYPE_POINTER_TYPE (type) = ntype; |
| 129 | |
| 130 | /* FIXME! Assume the machine has only one representation for pointers! */ |
| 131 | |
| 132 | TYPE_LENGTH (ntype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
| 133 | TYPE_CODE (ntype) = TYPE_CODE_PTR; |
| 134 | |
| 135 | /* pointers are unsigned */ |
| 136 | TYPE_FLAGS (ntype) |= TYPE_FLAG_UNSIGNED; |
| 137 | |
| 138 | if (!TYPE_POINTER_TYPE (type)) /* Remember it, if don't have one. */ |
| 139 | TYPE_POINTER_TYPE (type) = ntype; |
| 140 | |
| 141 | return ntype; |
| 142 | } |
| 143 | |
| 144 | /* Given a type TYPE, return a type of pointers to that type. |
| 145 | May need to construct such a type if this is the first use. */ |
| 146 | |
| 147 | struct type * |
| 148 | lookup_pointer_type (type) |
| 149 | struct type *type; |
| 150 | { |
| 151 | return make_pointer_type (type, (struct type **)0); |
| 152 | } |
| 153 | |
| 154 | /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero, points |
| 155 | to a pointer to memory where the reference type should be stored. |
| 156 | If *TYPEPTR is zero, update it to point to the reference type we return. |
| 157 | We allocate new memory if needed. */ |
| 158 | |
| 159 | struct type * |
| 160 | make_reference_type (type, typeptr) |
| 161 | struct type *type; |
| 162 | struct type **typeptr; |
| 163 | { |
| 164 | register struct type *ntype; /* New type */ |
| 165 | struct objfile *objfile; |
| 166 | |
| 167 | ntype = TYPE_REFERENCE_TYPE (type); |
| 168 | |
| 169 | if (ntype) |
| 170 | if (typeptr == 0) |
| 171 | return ntype; /* Don't care about alloc, and have new type. */ |
| 172 | else if (*typeptr == 0) |
| 173 | { |
| 174 | *typeptr = ntype; /* Tracking alloc, and we have new type. */ |
| 175 | return ntype; |
| 176 | } |
| 177 | |
| 178 | if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */ |
| 179 | { |
| 180 | ntype = alloc_type (TYPE_OBJFILE (type)); |
| 181 | if (typeptr) |
| 182 | *typeptr = ntype; |
| 183 | } |
| 184 | else /* We have storage, but need to reset it. */ |
| 185 | { |
| 186 | ntype = *typeptr; |
| 187 | objfile = TYPE_OBJFILE (ntype); |
| 188 | memset ((char *) ntype, 0, sizeof (struct type)); |
| 189 | TYPE_OBJFILE (ntype) = objfile; |
| 190 | } |
| 191 | |
| 192 | TYPE_TARGET_TYPE (ntype) = type; |
| 193 | TYPE_REFERENCE_TYPE (type) = ntype; |
| 194 | |
| 195 | /* FIXME! Assume the machine has only one representation for references, |
| 196 | and that it matches the (only) representation for pointers! */ |
| 197 | |
| 198 | TYPE_LENGTH (ntype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
| 199 | TYPE_CODE (ntype) = TYPE_CODE_REF; |
| 200 | |
| 201 | if (!TYPE_REFERENCE_TYPE (type)) /* Remember it, if don't have one. */ |
| 202 | TYPE_REFERENCE_TYPE (type) = ntype; |
| 203 | |
| 204 | return ntype; |
| 205 | } |
| 206 | |
| 207 | /* Same as above, but caller doesn't care about memory allocation details. */ |
| 208 | |
| 209 | struct type * |
| 210 | lookup_reference_type (type) |
| 211 | struct type *type; |
| 212 | { |
| 213 | return make_reference_type (type, (struct type **)0); |
| 214 | } |
| 215 | |
| 216 | /* Lookup a function type that returns type TYPE. TYPEPTR, if nonzero, points |
| 217 | to a pointer to memory where the function type should be stored. |
| 218 | If *TYPEPTR is zero, update it to point to the function type we return. |
| 219 | We allocate new memory if needed. */ |
| 220 | |
| 221 | struct type * |
| 222 | make_function_type (type, typeptr) |
| 223 | struct type *type; |
| 224 | struct type **typeptr; |
| 225 | { |
| 226 | register struct type *ntype; /* New type */ |
| 227 | struct objfile *objfile; |
| 228 | |
| 229 | ntype = TYPE_FUNCTION_TYPE (type); |
| 230 | |
| 231 | if (ntype) |
| 232 | if (typeptr == 0) |
| 233 | return ntype; /* Don't care about alloc, and have new type. */ |
| 234 | else if (*typeptr == 0) |
| 235 | { |
| 236 | *typeptr = ntype; /* Tracking alloc, and we have new type. */ |
| 237 | return ntype; |
| 238 | } |
| 239 | |
| 240 | if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */ |
| 241 | { |
| 242 | ntype = alloc_type (TYPE_OBJFILE (type)); |
| 243 | if (typeptr) |
| 244 | *typeptr = ntype; |
| 245 | } |
| 246 | else /* We have storage, but need to reset it. */ |
| 247 | { |
| 248 | ntype = *typeptr; |
| 249 | objfile = TYPE_OBJFILE (ntype); |
| 250 | memset ((char *) ntype, 0, sizeof (struct type)); |
| 251 | TYPE_OBJFILE (ntype) = objfile; |
| 252 | } |
| 253 | |
| 254 | TYPE_TARGET_TYPE (ntype) = type; |
| 255 | TYPE_FUNCTION_TYPE (type) = ntype; |
| 256 | |
| 257 | TYPE_LENGTH (ntype) = 1; |
| 258 | TYPE_CODE (ntype) = TYPE_CODE_FUNC; |
| 259 | |
| 260 | if (!TYPE_FUNCTION_TYPE (type)) /* Remember it, if don't have one. */ |
| 261 | TYPE_FUNCTION_TYPE (type) = ntype; |
| 262 | |
| 263 | return ntype; |
| 264 | } |
| 265 | |
| 266 | |
| 267 | /* Given a type TYPE, return a type of functions that return that type. |
| 268 | May need to construct such a type if this is the first use. */ |
| 269 | |
| 270 | struct type * |
| 271 | lookup_function_type (type) |
| 272 | struct type *type; |
| 273 | { |
| 274 | return make_function_type (type, (struct type **)0); |
| 275 | } |
| 276 | |
| 277 | /* Implement direct support for MEMBER_TYPE in GNU C++. |
| 278 | May need to construct such a type if this is the first use. |
| 279 | The TYPE is the type of the member. The DOMAIN is the type |
| 280 | of the aggregate that the member belongs to. */ |
| 281 | |
| 282 | struct type * |
| 283 | lookup_member_type (type, domain) |
| 284 | struct type *type; |
| 285 | struct type *domain; |
| 286 | { |
| 287 | register struct type *mtype; |
| 288 | |
| 289 | mtype = alloc_type (TYPE_OBJFILE (type)); |
| 290 | smash_to_member_type (mtype, domain, type); |
| 291 | return (mtype); |
| 292 | } |
| 293 | |
| 294 | /* Allocate a stub method whose return type is TYPE. |
| 295 | This apparently happens for speed of symbol reading, since parsing |
| 296 | out the arguments to the method is cpu-intensive, the way we are doing |
| 297 | it. So, we will fill in arguments later. |
| 298 | This always returns a fresh type. */ |
| 299 | |
| 300 | struct type * |
| 301 | allocate_stub_method (type) |
| 302 | struct type *type; |
| 303 | { |
| 304 | struct type *mtype; |
| 305 | |
| 306 | mtype = alloc_type (TYPE_OBJFILE (type)); |
| 307 | TYPE_TARGET_TYPE (mtype) = type; |
| 308 | /* _DOMAIN_TYPE (mtype) = unknown yet */ |
| 309 | /* _ARG_TYPES (mtype) = unknown yet */ |
| 310 | TYPE_FLAGS (mtype) = TYPE_FLAG_STUB; |
| 311 | TYPE_CODE (mtype) = TYPE_CODE_METHOD; |
| 312 | TYPE_LENGTH (mtype) = 1; |
| 313 | return (mtype); |
| 314 | } |
| 315 | |
| 316 | /* Create a range type using either a blank type supplied in RESULT_TYPE, |
| 317 | or creating a new type, inheriting the objfile from INDEX_TYPE. |
| 318 | |
| 319 | Indices will be of type INDEX_TYPE, and will range from LOW_BOUND to |
| 320 | HIGH_BOUND, inclusive. |
| 321 | |
| 322 | FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make |
| 323 | sure it is TYPE_CODE_UNDEF before we bash it into a range type? */ |
| 324 | |
| 325 | struct type * |
| 326 | create_range_type (result_type, index_type, low_bound, high_bound) |
| 327 | struct type *result_type; |
| 328 | struct type *index_type; |
| 329 | int low_bound; |
| 330 | int high_bound; |
| 331 | { |
| 332 | if (result_type == NULL) |
| 333 | { |
| 334 | result_type = alloc_type (TYPE_OBJFILE (index_type)); |
| 335 | } |
| 336 | TYPE_CODE (result_type) = TYPE_CODE_RANGE; |
| 337 | TYPE_TARGET_TYPE (result_type) = index_type; |
| 338 | TYPE_LENGTH (result_type) = TYPE_LENGTH (index_type); |
| 339 | TYPE_NFIELDS (result_type) = 2; |
| 340 | TYPE_FIELDS (result_type) = (struct field *) |
| 341 | TYPE_ALLOC (result_type, 2 * sizeof (struct field)); |
| 342 | memset (TYPE_FIELDS (result_type), 0, 2 * sizeof (struct field)); |
| 343 | TYPE_FIELD_BITPOS (result_type, 0) = low_bound; |
| 344 | TYPE_FIELD_BITPOS (result_type, 1) = high_bound; |
| 345 | TYPE_FIELD_TYPE (result_type, 0) = builtin_type_int; /* FIXME */ |
| 346 | TYPE_FIELD_TYPE (result_type, 1) = builtin_type_int; /* FIXME */ |
| 347 | |
| 348 | return (result_type); |
| 349 | } |
| 350 | |
| 351 | /* A lot of code assumes that the "index type" of an array/string/ |
| 352 | set/bitstring is specifically a range type, though in some languages |
| 353 | it can be any discrete type. */ |
| 354 | |
| 355 | struct type * |
| 356 | force_to_range_type (type) |
| 357 | struct type *type; |
| 358 | { |
| 359 | switch (TYPE_CODE (type)) |
| 360 | { |
| 361 | case TYPE_CODE_RANGE: |
| 362 | return type; |
| 363 | |
| 364 | case TYPE_CODE_ENUM: |
| 365 | { |
| 366 | int low_bound = TYPE_FIELD_BITPOS (type, 0); |
| 367 | int high_bound = TYPE_FIELD_BITPOS (type, TYPE_NFIELDS (type) - 1); |
| 368 | struct type *range_type = |
| 369 | create_range_type (NULL, type, low_bound, high_bound); |
| 370 | TYPE_NAME (range_type) = TYPE_NAME (range_type); |
| 371 | TYPE_DUMMY_RANGE (range_type) = 1; |
| 372 | return range_type; |
| 373 | } |
| 374 | case TYPE_CODE_BOOL: |
| 375 | { |
| 376 | struct type *range_type = create_range_type (NULL, type, 0, 1); |
| 377 | TYPE_NAME (range_type) = TYPE_NAME (range_type); |
| 378 | TYPE_DUMMY_RANGE (range_type) = 1; |
| 379 | return range_type; |
| 380 | } |
| 381 | case TYPE_CODE_CHAR: |
| 382 | { |
| 383 | struct type *range_type = create_range_type (NULL, type, 0, 255); |
| 384 | TYPE_NAME (range_type) = TYPE_NAME (range_type); |
| 385 | TYPE_DUMMY_RANGE (range_type) = 1; |
| 386 | return range_type; |
| 387 | } |
| 388 | default: |
| 389 | { |
| 390 | static struct complaint msg = |
| 391 | { "array index type must be a discrete type", 0, 0}; |
| 392 | complain (&msg); |
| 393 | |
| 394 | return create_range_type (NULL, builtin_type_int, 0, 0); |
| 395 | } |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | /* Create an array type using either a blank type supplied in RESULT_TYPE, |
| 400 | or creating a new type, inheriting the objfile from RANGE_TYPE. |
| 401 | |
| 402 | Elements will be of type ELEMENT_TYPE, the indices will be of type |
| 403 | RANGE_TYPE. |
| 404 | |
| 405 | FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make |
| 406 | sure it is TYPE_CODE_UNDEF before we bash it into an array type? */ |
| 407 | |
| 408 | struct type * |
| 409 | create_array_type (result_type, element_type, range_type) |
| 410 | struct type *result_type; |
| 411 | struct type *element_type; |
| 412 | struct type *range_type; |
| 413 | { |
| 414 | int low_bound; |
| 415 | int high_bound; |
| 416 | |
| 417 | range_type = force_to_range_type (range_type); |
| 418 | if (result_type == NULL) |
| 419 | { |
| 420 | result_type = alloc_type (TYPE_OBJFILE (range_type)); |
| 421 | } |
| 422 | TYPE_CODE (result_type) = TYPE_CODE_ARRAY; |
| 423 | TYPE_TARGET_TYPE (result_type) = element_type; |
| 424 | low_bound = TYPE_LOW_BOUND (range_type); |
| 425 | high_bound = TYPE_HIGH_BOUND (range_type); |
| 426 | TYPE_LENGTH (result_type) = |
| 427 | TYPE_LENGTH (element_type) * (high_bound - low_bound + 1); |
| 428 | TYPE_NFIELDS (result_type) = 1; |
| 429 | TYPE_FIELDS (result_type) = |
| 430 | (struct field *) TYPE_ALLOC (result_type, sizeof (struct field)); |
| 431 | memset (TYPE_FIELDS (result_type), 0, sizeof (struct field)); |
| 432 | TYPE_FIELD_TYPE (result_type, 0) = range_type; |
| 433 | TYPE_VPTR_FIELDNO (result_type) = -1; |
| 434 | |
| 435 | return (result_type); |
| 436 | } |
| 437 | |
| 438 | /* Create a string type using either a blank type supplied in RESULT_TYPE, |
| 439 | or creating a new type. String types are similar enough to array of |
| 440 | char types that we can use create_array_type to build the basic type |
| 441 | and then bash it into a string type. |
| 442 | |
| 443 | For fixed length strings, the range type contains 0 as the lower |
| 444 | bound and the length of the string minus one as the upper bound. |
| 445 | |
| 446 | FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make |
| 447 | sure it is TYPE_CODE_UNDEF before we bash it into a string type? */ |
| 448 | |
| 449 | struct type * |
| 450 | create_string_type (result_type, range_type) |
| 451 | struct type *result_type; |
| 452 | struct type *range_type; |
| 453 | { |
| 454 | result_type = create_array_type (result_type, builtin_type_char, range_type); |
| 455 | TYPE_CODE (result_type) = TYPE_CODE_STRING; |
| 456 | return (result_type); |
| 457 | } |
| 458 | |
| 459 | struct type * |
| 460 | create_set_type (result_type, domain_type) |
| 461 | struct type *result_type; |
| 462 | struct type *domain_type; |
| 463 | { |
| 464 | int low_bound, high_bound, bit_length; |
| 465 | if (result_type == NULL) |
| 466 | { |
| 467 | result_type = alloc_type (TYPE_OBJFILE (domain_type)); |
| 468 | } |
| 469 | domain_type = force_to_range_type (domain_type); |
| 470 | TYPE_CODE (result_type) = TYPE_CODE_SET; |
| 471 | TYPE_NFIELDS (result_type) = 1; |
| 472 | TYPE_FIELDS (result_type) = (struct field *) |
| 473 | TYPE_ALLOC (result_type, 1 * sizeof (struct field)); |
| 474 | memset (TYPE_FIELDS (result_type), 0, sizeof (struct field)); |
| 475 | TYPE_FIELD_TYPE (result_type, 0) = domain_type; |
| 476 | low_bound = TYPE_LOW_BOUND (domain_type); |
| 477 | high_bound = TYPE_HIGH_BOUND (domain_type); |
| 478 | bit_length = high_bound - low_bound + 1; |
| 479 | if (bit_length <= TARGET_CHAR_BIT) |
| 480 | TYPE_LENGTH (result_type) = 1; |
| 481 | else if (bit_length <= TARGET_SHORT_BIT) |
| 482 | TYPE_LENGTH (result_type) = TARGET_SHORT_BIT / TARGET_CHAR_BIT; |
| 483 | else |
| 484 | TYPE_LENGTH (result_type) |
| 485 | = ((bit_length + TARGET_INT_BIT - 1) / TARGET_INT_BIT) |
| 486 | * TARGET_CHAR_BIT; |
| 487 | return (result_type); |
| 488 | } |
| 489 | |
| 490 | /* Smash TYPE to be a type of members of DOMAIN with type TO_TYPE. |
| 491 | A MEMBER is a wierd thing -- it amounts to a typed offset into |
| 492 | a struct, e.g. "an int at offset 8". A MEMBER TYPE doesn't |
| 493 | include the offset (that's the value of the MEMBER itself), but does |
| 494 | include the structure type into which it points (for some reason). |
| 495 | |
| 496 | When "smashing" the type, we preserve the objfile that the |
| 497 | old type pointed to, since we aren't changing where the type is actually |
| 498 | allocated. */ |
| 499 | |
| 500 | void |
| 501 | smash_to_member_type (type, domain, to_type) |
| 502 | struct type *type; |
| 503 | struct type *domain; |
| 504 | struct type *to_type; |
| 505 | { |
| 506 | struct objfile *objfile; |
| 507 | |
| 508 | objfile = TYPE_OBJFILE (type); |
| 509 | |
| 510 | memset ((char *) type, 0, sizeof (struct type)); |
| 511 | TYPE_OBJFILE (type) = objfile; |
| 512 | TYPE_TARGET_TYPE (type) = to_type; |
| 513 | TYPE_DOMAIN_TYPE (type) = domain; |
| 514 | TYPE_LENGTH (type) = 1; /* In practice, this is never needed. */ |
| 515 | TYPE_CODE (type) = TYPE_CODE_MEMBER; |
| 516 | } |
| 517 | |
| 518 | /* Smash TYPE to be a type of method of DOMAIN with type TO_TYPE. |
| 519 | METHOD just means `function that gets an extra "this" argument'. |
| 520 | |
| 521 | When "smashing" the type, we preserve the objfile that the |
| 522 | old type pointed to, since we aren't changing where the type is actually |
| 523 | allocated. */ |
| 524 | |
| 525 | void |
| 526 | smash_to_method_type (type, domain, to_type, args) |
| 527 | struct type *type; |
| 528 | struct type *domain; |
| 529 | struct type *to_type; |
| 530 | struct type **args; |
| 531 | { |
| 532 | struct objfile *objfile; |
| 533 | |
| 534 | objfile = TYPE_OBJFILE (type); |
| 535 | |
| 536 | memset ((char *) type, 0, sizeof (struct type)); |
| 537 | TYPE_OBJFILE (type) = objfile; |
| 538 | TYPE_TARGET_TYPE (type) = to_type; |
| 539 | TYPE_DOMAIN_TYPE (type) = domain; |
| 540 | TYPE_ARG_TYPES (type) = args; |
| 541 | TYPE_LENGTH (type) = 1; /* In practice, this is never needed. */ |
| 542 | TYPE_CODE (type) = TYPE_CODE_METHOD; |
| 543 | } |
| 544 | |
| 545 | /* Return a typename for a struct/union/enum type without "struct ", |
| 546 | "union ", or "enum ". If the type has a NULL name, return NULL. */ |
| 547 | |
| 548 | char * |
| 549 | type_name_no_tag (type) |
| 550 | register const struct type *type; |
| 551 | { |
| 552 | if (TYPE_TAG_NAME (type) != NULL) |
| 553 | return TYPE_TAG_NAME (type); |
| 554 | |
| 555 | /* Is there code which expects this to return the name if there is no |
| 556 | tag name? My guess is that this is mainly used for C++ in cases where |
| 557 | the two will always be the same. */ |
| 558 | return TYPE_NAME (type); |
| 559 | } |
| 560 | |
| 561 | /* Lookup a primitive type named NAME. |
| 562 | Return zero if NAME is not a primitive type.*/ |
| 563 | |
| 564 | struct type * |
| 565 | lookup_primitive_typename (name) |
| 566 | char *name; |
| 567 | { |
| 568 | struct type ** const *p; |
| 569 | |
| 570 | for (p = current_language -> la_builtin_type_vector; *p != NULL; p++) |
| 571 | { |
| 572 | if (STREQ ((**p) -> name, name)) |
| 573 | { |
| 574 | return (**p); |
| 575 | } |
| 576 | } |
| 577 | return (NULL); |
| 578 | } |
| 579 | |
| 580 | /* Lookup a typedef or primitive type named NAME, |
| 581 | visible in lexical block BLOCK. |
| 582 | If NOERR is nonzero, return zero if NAME is not suitably defined. */ |
| 583 | |
| 584 | struct type * |
| 585 | lookup_typename (name, block, noerr) |
| 586 | char *name; |
| 587 | struct block *block; |
| 588 | int noerr; |
| 589 | { |
| 590 | register struct symbol *sym; |
| 591 | register struct type *tmp; |
| 592 | |
| 593 | sym = lookup_symbol (name, block, VAR_NAMESPACE, 0, (struct symtab **) NULL); |
| 594 | if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF) |
| 595 | { |
| 596 | tmp = lookup_primitive_typename (name); |
| 597 | if (tmp) |
| 598 | { |
| 599 | return (tmp); |
| 600 | } |
| 601 | else if (!tmp && noerr) |
| 602 | { |
| 603 | return (NULL); |
| 604 | } |
| 605 | else |
| 606 | { |
| 607 | error ("No type named %s.", name); |
| 608 | } |
| 609 | } |
| 610 | return (SYMBOL_TYPE (sym)); |
| 611 | } |
| 612 | |
| 613 | struct type * |
| 614 | lookup_unsigned_typename (name) |
| 615 | char *name; |
| 616 | { |
| 617 | char *uns = alloca (strlen (name) + 10); |
| 618 | |
| 619 | strcpy (uns, "unsigned "); |
| 620 | strcpy (uns + 9, name); |
| 621 | return (lookup_typename (uns, (struct block *) NULL, 0)); |
| 622 | } |
| 623 | |
| 624 | struct type * |
| 625 | lookup_signed_typename (name) |
| 626 | char *name; |
| 627 | { |
| 628 | struct type *t; |
| 629 | char *uns = alloca (strlen (name) + 8); |
| 630 | |
| 631 | strcpy (uns, "signed "); |
| 632 | strcpy (uns + 7, name); |
| 633 | t = lookup_typename (uns, (struct block *) NULL, 1); |
| 634 | /* If we don't find "signed FOO" just try again with plain "FOO". */ |
| 635 | if (t != NULL) |
| 636 | return t; |
| 637 | return lookup_typename (name, (struct block *) NULL, 0); |
| 638 | } |
| 639 | |
| 640 | /* Lookup a structure type named "struct NAME", |
| 641 | visible in lexical block BLOCK. */ |
| 642 | |
| 643 | struct type * |
| 644 | lookup_struct (name, block) |
| 645 | char *name; |
| 646 | struct block *block; |
| 647 | { |
| 648 | register struct symbol *sym; |
| 649 | |
| 650 | sym = lookup_symbol (name, block, STRUCT_NAMESPACE, 0, |
| 651 | (struct symtab **) NULL); |
| 652 | |
| 653 | if (sym == NULL) |
| 654 | { |
| 655 | error ("No struct type named %s.", name); |
| 656 | } |
| 657 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT) |
| 658 | { |
| 659 | error ("This context has class, union or enum %s, not a struct.", name); |
| 660 | } |
| 661 | return (SYMBOL_TYPE (sym)); |
| 662 | } |
| 663 | |
| 664 | /* Lookup a union type named "union NAME", |
| 665 | visible in lexical block BLOCK. */ |
| 666 | |
| 667 | struct type * |
| 668 | lookup_union (name, block) |
| 669 | char *name; |
| 670 | struct block *block; |
| 671 | { |
| 672 | register struct symbol *sym; |
| 673 | |
| 674 | sym = lookup_symbol (name, block, STRUCT_NAMESPACE, 0, |
| 675 | (struct symtab **) NULL); |
| 676 | |
| 677 | if (sym == NULL) |
| 678 | { |
| 679 | error ("No union type named %s.", name); |
| 680 | } |
| 681 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_UNION) |
| 682 | { |
| 683 | error ("This context has class, struct or enum %s, not a union.", name); |
| 684 | } |
| 685 | return (SYMBOL_TYPE (sym)); |
| 686 | } |
| 687 | |
| 688 | /* Lookup an enum type named "enum NAME", |
| 689 | visible in lexical block BLOCK. */ |
| 690 | |
| 691 | struct type * |
| 692 | lookup_enum (name, block) |
| 693 | char *name; |
| 694 | struct block *block; |
| 695 | { |
| 696 | register struct symbol *sym; |
| 697 | |
| 698 | sym = lookup_symbol (name, block, STRUCT_NAMESPACE, 0, |
| 699 | (struct symtab **) NULL); |
| 700 | if (sym == NULL) |
| 701 | { |
| 702 | error ("No enum type named %s.", name); |
| 703 | } |
| 704 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_ENUM) |
| 705 | { |
| 706 | error ("This context has class, struct or union %s, not an enum.", name); |
| 707 | } |
| 708 | return (SYMBOL_TYPE (sym)); |
| 709 | } |
| 710 | |
| 711 | /* Lookup a template type named "template NAME<TYPE>", |
| 712 | visible in lexical block BLOCK. */ |
| 713 | |
| 714 | struct type * |
| 715 | lookup_template_type (name, type, block) |
| 716 | char *name; |
| 717 | struct type *type; |
| 718 | struct block *block; |
| 719 | { |
| 720 | struct symbol *sym; |
| 721 | char *nam = (char*) alloca(strlen(name) + strlen(type->name) + 4); |
| 722 | strcpy (nam, name); |
| 723 | strcat (nam, "<"); |
| 724 | strcat (nam, type->name); |
| 725 | strcat (nam, " >"); /* FIXME, extra space still introduced in gcc? */ |
| 726 | |
| 727 | sym = lookup_symbol (nam, block, VAR_NAMESPACE, 0, (struct symtab **)NULL); |
| 728 | |
| 729 | if (sym == NULL) |
| 730 | { |
| 731 | error ("No template type named %s.", name); |
| 732 | } |
| 733 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT) |
| 734 | { |
| 735 | error ("This context has class, union or enum %s, not a struct.", name); |
| 736 | } |
| 737 | return (SYMBOL_TYPE (sym)); |
| 738 | } |
| 739 | |
| 740 | /* Given a type TYPE, lookup the type of the component of type named NAME. |
| 741 | |
| 742 | TYPE can be either a struct or union, or a pointer or reference to a struct or |
| 743 | union. If it is a pointer or reference, its target type is automatically used. |
| 744 | Thus '.' and '->' are interchangable, as specified for the definitions of the |
| 745 | expression element types STRUCTOP_STRUCT and STRUCTOP_PTR. |
| 746 | |
| 747 | If NOERR is nonzero, return zero if NAME is not suitably defined. |
| 748 | If NAME is the name of a baseclass type, return that type. */ |
| 749 | |
| 750 | struct type * |
| 751 | lookup_struct_elt_type (type, name, noerr) |
| 752 | struct type *type; |
| 753 | char *name; |
| 754 | int noerr; |
| 755 | { |
| 756 | int i; |
| 757 | |
| 758 | while (TYPE_CODE (type) == TYPE_CODE_PTR || |
| 759 | TYPE_CODE (type) == TYPE_CODE_REF) |
| 760 | type = TYPE_TARGET_TYPE (type); |
| 761 | |
| 762 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT && |
| 763 | TYPE_CODE (type) != TYPE_CODE_UNION) |
| 764 | { |
| 765 | target_terminal_ours (); |
| 766 | gdb_flush (gdb_stdout); |
| 767 | fprintf_unfiltered (gdb_stderr, "Type "); |
| 768 | type_print (type, "", gdb_stderr, -1); |
| 769 | error (" is not a structure or union type."); |
| 770 | } |
| 771 | |
| 772 | check_stub_type (type); |
| 773 | |
| 774 | #if 0 |
| 775 | /* FIXME: This change put in by Michael seems incorrect for the case where |
| 776 | the structure tag name is the same as the member name. I.E. when doing |
| 777 | "ptype bell->bar" for "struct foo { int bar; int foo; } bell;" |
| 778 | Disabled by fnf. */ |
| 779 | { |
| 780 | char *typename; |
| 781 | |
| 782 | typename = type_name_no_tag (type); |
| 783 | if (typename != NULL && STREQ (typename, name)) |
| 784 | return type; |
| 785 | } |
| 786 | #endif |
| 787 | |
| 788 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) |
| 789 | { |
| 790 | char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 791 | |
| 792 | if (t_field_name && STREQ (t_field_name, name)) |
| 793 | { |
| 794 | return TYPE_FIELD_TYPE (type, i); |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /* OK, it's not in this class. Recursively check the baseclasses. */ |
| 799 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
| 800 | { |
| 801 | struct type *t; |
| 802 | |
| 803 | t = lookup_struct_elt_type (TYPE_BASECLASS (type, i), name, noerr); |
| 804 | if (t != NULL) |
| 805 | { |
| 806 | return t; |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | if (noerr) |
| 811 | { |
| 812 | return NULL; |
| 813 | } |
| 814 | |
| 815 | target_terminal_ours (); |
| 816 | gdb_flush (gdb_stdout); |
| 817 | fprintf_unfiltered (gdb_stderr, "Type "); |
| 818 | type_print (type, "", gdb_stderr, -1); |
| 819 | fprintf_unfiltered (gdb_stderr, " has no component named "); |
| 820 | fputs_filtered (name, gdb_stderr); |
| 821 | error ("."); |
| 822 | return (struct type *)-1; /* For lint */ |
| 823 | } |
| 824 | |
| 825 | /* If possible, make the vptr_fieldno and vptr_basetype fields of TYPE |
| 826 | valid. Callers should be aware that in some cases (for example, |
| 827 | the type or one of its baseclasses is a stub type and we are |
| 828 | debugging a .o file), this function will not be able to find the virtual |
| 829 | function table pointer, and vptr_fieldno will remain -1 and vptr_basetype |
| 830 | will remain NULL. */ |
| 831 | |
| 832 | void |
| 833 | fill_in_vptr_fieldno (type) |
| 834 | struct type *type; |
| 835 | { |
| 836 | check_stub_type (type); |
| 837 | |
| 838 | if (TYPE_VPTR_FIELDNO (type) < 0) |
| 839 | { |
| 840 | int i; |
| 841 | |
| 842 | /* We must start at zero in case the first (and only) baseclass is |
| 843 | virtual (and hence we cannot share the table pointer). */ |
| 844 | for (i = 0; i < TYPE_N_BASECLASSES (type); i++) |
| 845 | { |
| 846 | fill_in_vptr_fieldno (TYPE_BASECLASS (type, i)); |
| 847 | if (TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, i)) >= 0) |
| 848 | { |
| 849 | TYPE_VPTR_FIELDNO (type) |
| 850 | = TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, i)); |
| 851 | TYPE_VPTR_BASETYPE (type) |
| 852 | = TYPE_VPTR_BASETYPE (TYPE_BASECLASS (type, i)); |
| 853 | break; |
| 854 | } |
| 855 | } |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | /* Added by Bryan Boreham, Kewill, Sun Sep 17 18:07:17 1989. |
| 860 | |
| 861 | If this is a stubbed struct (i.e. declared as struct foo *), see if |
| 862 | we can find a full definition in some other file. If so, copy this |
| 863 | definition, so we can use it in future. There used to be a comment (but |
| 864 | not any code) that if we don't find a full definition, we'd set a flag |
| 865 | so we don't spend time in the future checking the same type. That would |
| 866 | be a mistake, though--we might load in more symbols which contain a |
| 867 | full definition for the type. |
| 868 | |
| 869 | This used to be coded as a macro, but I don't think it is called |
| 870 | often enough to merit such treatment. */ |
| 871 | |
| 872 | struct complaint stub_noname_complaint = |
| 873 | {"stub type has NULL name", 0, 0}; |
| 874 | |
| 875 | void |
| 876 | check_stub_type (type) |
| 877 | struct type *type; |
| 878 | { |
| 879 | if (TYPE_FLAGS(type) & TYPE_FLAG_STUB) |
| 880 | { |
| 881 | char* name = type_name_no_tag (type); |
| 882 | /* FIXME: shouldn't we separately check the TYPE_NAME and the |
| 883 | TYPE_TAG_NAME, and look in STRUCT_NAMESPACE and/or VAR_NAMESPACE |
| 884 | as appropriate? (this code was written before TYPE_NAME and |
| 885 | TYPE_TAG_NAME were separate). */ |
| 886 | struct symbol *sym; |
| 887 | if (name == NULL) |
| 888 | { |
| 889 | complain (&stub_noname_complaint); |
| 890 | return; |
| 891 | } |
| 892 | sym = lookup_symbol (name, 0, STRUCT_NAMESPACE, 0, |
| 893 | (struct symtab **) NULL); |
| 894 | if (sym) |
| 895 | { |
| 896 | memcpy ((char *)type, |
| 897 | (char *)SYMBOL_TYPE(sym), |
| 898 | sizeof (struct type)); |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | if (TYPE_FLAGS (type) & TYPE_FLAG_TARGET_STUB) |
| 903 | { |
| 904 | struct type *range_type; |
| 905 | |
| 906 | check_stub_type (TYPE_TARGET_TYPE (type)); |
| 907 | if (!(TYPE_FLAGS (TYPE_TARGET_TYPE (type)) & TYPE_FLAG_STUB) |
| 908 | && TYPE_CODE (type) == TYPE_CODE_ARRAY |
| 909 | && TYPE_NFIELDS (type) == 1 |
| 910 | && (TYPE_CODE (range_type = TYPE_FIELD_TYPE (type, 0)) |
| 911 | == TYPE_CODE_RANGE)) |
| 912 | { |
| 913 | /* Now recompute the length of the array type, based on its |
| 914 | number of elements and the target type's length. */ |
| 915 | TYPE_LENGTH (type) = |
| 916 | ((TYPE_FIELD_BITPOS (range_type, 1) |
| 917 | - TYPE_FIELD_BITPOS (range_type, 0) |
| 918 | + 1) |
| 919 | * TYPE_LENGTH (TYPE_TARGET_TYPE (type))); |
| 920 | TYPE_FLAGS (type) &= ~TYPE_FLAG_TARGET_STUB; |
| 921 | } |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | /* Ugly hack to convert method stubs into method types. |
| 926 | |
| 927 | He ain't kiddin'. This demangles the name of the method into a string |
| 928 | including argument types, parses out each argument type, generates |
| 929 | a string casting a zero to that type, evaluates the string, and stuffs |
| 930 | the resulting type into an argtype vector!!! Then it knows the type |
| 931 | of the whole function (including argument types for overloading), |
| 932 | which info used to be in the stab's but was removed to hack back |
| 933 | the space required for them. */ |
| 934 | |
| 935 | void |
| 936 | check_stub_method (type, i, j) |
| 937 | struct type *type; |
| 938 | int i; |
| 939 | int j; |
| 940 | { |
| 941 | struct fn_field *f; |
| 942 | char *mangled_name = gdb_mangle_name (type, i, j); |
| 943 | char *demangled_name = cplus_demangle (mangled_name, |
| 944 | DMGL_PARAMS | DMGL_ANSI); |
| 945 | char *argtypetext, *p; |
| 946 | int depth = 0, argcount = 1; |
| 947 | struct type **argtypes; |
| 948 | struct type *mtype; |
| 949 | |
| 950 | if (demangled_name == NULL) |
| 951 | { |
| 952 | error ("Internal: Cannot demangle mangled name `%s'.", mangled_name); |
| 953 | } |
| 954 | |
| 955 | /* Now, read in the parameters that define this type. */ |
| 956 | argtypetext = strchr (demangled_name, '(') + 1; |
| 957 | p = argtypetext; |
| 958 | while (*p) |
| 959 | { |
| 960 | if (*p == '(') |
| 961 | { |
| 962 | depth += 1; |
| 963 | } |
| 964 | else if (*p == ')') |
| 965 | { |
| 966 | depth -= 1; |
| 967 | } |
| 968 | else if (*p == ',' && depth == 0) |
| 969 | { |
| 970 | argcount += 1; |
| 971 | } |
| 972 | |
| 973 | p += 1; |
| 974 | } |
| 975 | |
| 976 | /* We need two more slots: one for the THIS pointer, and one for the |
| 977 | NULL [...] or void [end of arglist]. */ |
| 978 | |
| 979 | argtypes = (struct type **) |
| 980 | TYPE_ALLOC (type, (argcount + 2) * sizeof (struct type *)); |
| 981 | p = argtypetext; |
| 982 | argtypes[0] = lookup_pointer_type (type); |
| 983 | argcount = 1; |
| 984 | |
| 985 | if (*p != ')') /* () means no args, skip while */ |
| 986 | { |
| 987 | depth = 0; |
| 988 | while (*p) |
| 989 | { |
| 990 | if (depth <= 0 && (*p == ',' || *p == ')')) |
| 991 | { |
| 992 | /* Avoid parsing of ellipsis, they will be handled below. */ |
| 993 | if (strncmp (argtypetext, "...", p - argtypetext) != 0) |
| 994 | { |
| 995 | argtypes[argcount] = |
| 996 | parse_and_eval_type (argtypetext, p - argtypetext); |
| 997 | argcount += 1; |
| 998 | } |
| 999 | argtypetext = p + 1; |
| 1000 | } |
| 1001 | |
| 1002 | if (*p == '(') |
| 1003 | { |
| 1004 | depth += 1; |
| 1005 | } |
| 1006 | else if (*p == ')') |
| 1007 | { |
| 1008 | depth -= 1; |
| 1009 | } |
| 1010 | |
| 1011 | p += 1; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | if (p[-2] != '.') /* Not '...' */ |
| 1016 | { |
| 1017 | argtypes[argcount] = builtin_type_void; /* List terminator */ |
| 1018 | } |
| 1019 | else |
| 1020 | { |
| 1021 | argtypes[argcount] = NULL; /* Ellist terminator */ |
| 1022 | } |
| 1023 | |
| 1024 | free (demangled_name); |
| 1025 | |
| 1026 | f = TYPE_FN_FIELDLIST1 (type, i); |
| 1027 | TYPE_FN_FIELD_PHYSNAME (f, j) = mangled_name; |
| 1028 | |
| 1029 | /* Now update the old "stub" type into a real type. */ |
| 1030 | mtype = TYPE_FN_FIELD_TYPE (f, j); |
| 1031 | TYPE_DOMAIN_TYPE (mtype) = type; |
| 1032 | TYPE_ARG_TYPES (mtype) = argtypes; |
| 1033 | TYPE_FLAGS (mtype) &= ~TYPE_FLAG_STUB; |
| 1034 | TYPE_FN_FIELD_STUB (f, j) = 0; |
| 1035 | } |
| 1036 | |
| 1037 | const struct cplus_struct_type cplus_struct_default; |
| 1038 | |
| 1039 | void |
| 1040 | allocate_cplus_struct_type (type) |
| 1041 | struct type *type; |
| 1042 | { |
| 1043 | if (!HAVE_CPLUS_STRUCT (type)) |
| 1044 | { |
| 1045 | TYPE_CPLUS_SPECIFIC (type) = (struct cplus_struct_type *) |
| 1046 | TYPE_ALLOC (type, sizeof (struct cplus_struct_type)); |
| 1047 | *(TYPE_CPLUS_SPECIFIC(type)) = cplus_struct_default; |
| 1048 | } |
| 1049 | } |
| 1050 | |
| 1051 | /* Helper function to initialize the standard scalar types. |
| 1052 | |
| 1053 | If NAME is non-NULL and OBJFILE is non-NULL, then we make a copy |
| 1054 | of the string pointed to by name in the type_obstack for that objfile, |
| 1055 | and initialize the type name to that copy. There are places (mipsread.c |
| 1056 | in particular, where init_type is called with a NULL value for NAME). */ |
| 1057 | |
| 1058 | struct type * |
| 1059 | init_type (code, length, flags, name, objfile) |
| 1060 | enum type_code code; |
| 1061 | int length; |
| 1062 | int flags; |
| 1063 | char *name; |
| 1064 | struct objfile *objfile; |
| 1065 | { |
| 1066 | register struct type *type; |
| 1067 | |
| 1068 | type = alloc_type (objfile); |
| 1069 | TYPE_CODE (type) = code; |
| 1070 | TYPE_LENGTH (type) = length; |
| 1071 | TYPE_FLAGS (type) |= flags; |
| 1072 | if ((name != NULL) && (objfile != NULL)) |
| 1073 | { |
| 1074 | TYPE_NAME (type) = |
| 1075 | obsavestring (name, strlen (name), &objfile -> type_obstack); |
| 1076 | } |
| 1077 | else |
| 1078 | { |
| 1079 | TYPE_NAME (type) = name; |
| 1080 | } |
| 1081 | |
| 1082 | /* C++ fancies. */ |
| 1083 | |
| 1084 | if (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION) |
| 1085 | { |
| 1086 | INIT_CPLUS_SPECIFIC (type); |
| 1087 | } |
| 1088 | return (type); |
| 1089 | } |
| 1090 | |
| 1091 | /* Look up a fundamental type for the specified objfile. |
| 1092 | May need to construct such a type if this is the first use. |
| 1093 | |
| 1094 | Some object file formats (ELF, COFF, etc) do not define fundamental |
| 1095 | types such as "int" or "double". Others (stabs for example), do |
| 1096 | define fundamental types. |
| 1097 | |
| 1098 | For the formats which don't provide fundamental types, gdb can create |
| 1099 | such types, using defaults reasonable for the current language and |
| 1100 | the current target machine. |
| 1101 | |
| 1102 | NOTE: This routine is obsolescent. Each debugging format reader |
| 1103 | should manage it's own fundamental types, either creating them from |
| 1104 | suitable defaults or reading them from the debugging information, |
| 1105 | whichever is appropriate. The DWARF reader has already been |
| 1106 | fixed to do this. Once the other readers are fixed, this routine |
| 1107 | will go away. Also note that fundamental types should be managed |
| 1108 | on a compilation unit basis in a multi-language environment, not |
| 1109 | on a linkage unit basis as is done here. */ |
| 1110 | |
| 1111 | |
| 1112 | struct type * |
| 1113 | lookup_fundamental_type (objfile, typeid) |
| 1114 | struct objfile *objfile; |
| 1115 | int typeid; |
| 1116 | { |
| 1117 | register struct type **typep; |
| 1118 | register int nbytes; |
| 1119 | |
| 1120 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) |
| 1121 | { |
| 1122 | error ("internal error - invalid fundamental type id %d", typeid); |
| 1123 | } |
| 1124 | |
| 1125 | /* If this is the first time we need a fundamental type for this objfile |
| 1126 | then we need to initialize the vector of type pointers. */ |
| 1127 | |
| 1128 | if (objfile -> fundamental_types == NULL) |
| 1129 | { |
| 1130 | nbytes = FT_NUM_MEMBERS * sizeof (struct type *); |
| 1131 | objfile -> fundamental_types = (struct type **) |
| 1132 | obstack_alloc (&objfile -> type_obstack, nbytes); |
| 1133 | memset ((char *) objfile -> fundamental_types, 0, nbytes); |
| 1134 | } |
| 1135 | |
| 1136 | /* Look for this particular type in the fundamental type vector. If one is |
| 1137 | not found, create and install one appropriate for the current language. */ |
| 1138 | |
| 1139 | typep = objfile -> fundamental_types + typeid; |
| 1140 | if (*typep == NULL) |
| 1141 | { |
| 1142 | *typep = create_fundamental_type (objfile, typeid); |
| 1143 | } |
| 1144 | |
| 1145 | return (*typep); |
| 1146 | } |
| 1147 | |
| 1148 | #if MAINTENANCE_CMDS |
| 1149 | |
| 1150 | static void |
| 1151 | print_bit_vector (bits, nbits) |
| 1152 | B_TYPE *bits; |
| 1153 | int nbits; |
| 1154 | { |
| 1155 | int bitno; |
| 1156 | |
| 1157 | for (bitno = 0; bitno < nbits; bitno++) |
| 1158 | { |
| 1159 | if ((bitno % 8) == 0) |
| 1160 | { |
| 1161 | puts_filtered (" "); |
| 1162 | } |
| 1163 | if (B_TST (bits, bitno)) |
| 1164 | { |
| 1165 | printf_filtered ("1"); |
| 1166 | } |
| 1167 | else |
| 1168 | { |
| 1169 | printf_filtered ("0"); |
| 1170 | } |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | /* The args list is a strange beast. It is either terminated by a NULL |
| 1175 | pointer for varargs functions, or by a pointer to a TYPE_CODE_VOID |
| 1176 | type for normal fixed argcount functions. (FIXME someday) |
| 1177 | Also note the first arg should be the "this" pointer, we may not want to |
| 1178 | include it since we may get into a infinitely recursive situation. */ |
| 1179 | |
| 1180 | static void |
| 1181 | print_arg_types (args, spaces) |
| 1182 | struct type **args; |
| 1183 | int spaces; |
| 1184 | { |
| 1185 | if (args != NULL) |
| 1186 | { |
| 1187 | while (*args != NULL) |
| 1188 | { |
| 1189 | recursive_dump_type (*args, spaces + 2); |
| 1190 | if ((*args++) -> code == TYPE_CODE_VOID) |
| 1191 | { |
| 1192 | break; |
| 1193 | } |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | static void |
| 1199 | dump_fn_fieldlists (type, spaces) |
| 1200 | struct type *type; |
| 1201 | int spaces; |
| 1202 | { |
| 1203 | int method_idx; |
| 1204 | int overload_idx; |
| 1205 | struct fn_field *f; |
| 1206 | |
| 1207 | printfi_filtered (spaces, "fn_fieldlists 0x%lx\n", |
| 1208 | (unsigned long) TYPE_FN_FIELDLISTS (type)); |
| 1209 | for (method_idx = 0; method_idx < TYPE_NFN_FIELDS (type); method_idx++) |
| 1210 | { |
| 1211 | f = TYPE_FN_FIELDLIST1 (type, method_idx); |
| 1212 | printfi_filtered (spaces + 2, "[%d] name '%s' (0x%lx) length %d\n", |
| 1213 | method_idx, |
| 1214 | TYPE_FN_FIELDLIST_NAME (type, method_idx), |
| 1215 | (unsigned long) TYPE_FN_FIELDLIST_NAME (type, method_idx), |
| 1216 | TYPE_FN_FIELDLIST_LENGTH (type, method_idx)); |
| 1217 | for (overload_idx = 0; |
| 1218 | overload_idx < TYPE_FN_FIELDLIST_LENGTH (type, method_idx); |
| 1219 | overload_idx++) |
| 1220 | { |
| 1221 | printfi_filtered (spaces + 4, "[%d] physname '%s' (0x%lx)\n", |
| 1222 | overload_idx, |
| 1223 | TYPE_FN_FIELD_PHYSNAME (f, overload_idx), |
| 1224 | (unsigned long) TYPE_FN_FIELD_PHYSNAME (f, overload_idx)); |
| 1225 | printfi_filtered (spaces + 8, "type 0x%lx\n", |
| 1226 | (unsigned long) TYPE_FN_FIELD_TYPE (f, overload_idx)); |
| 1227 | recursive_dump_type (TYPE_FN_FIELD_TYPE (f, overload_idx), |
| 1228 | spaces + 8 + 2); |
| 1229 | printfi_filtered (spaces + 8, "args 0x%lx\n", |
| 1230 | (unsigned long) TYPE_FN_FIELD_ARGS (f, overload_idx)); |
| 1231 | print_arg_types (TYPE_FN_FIELD_ARGS (f, overload_idx), spaces); |
| 1232 | printfi_filtered (spaces + 8, "fcontext 0x%lx\n", |
| 1233 | (unsigned long) TYPE_FN_FIELD_FCONTEXT (f, overload_idx)); |
| 1234 | printfi_filtered (spaces + 8, "is_const %d\n", |
| 1235 | TYPE_FN_FIELD_CONST (f, overload_idx)); |
| 1236 | printfi_filtered (spaces + 8, "is_volatile %d\n", |
| 1237 | TYPE_FN_FIELD_VOLATILE (f, overload_idx)); |
| 1238 | printfi_filtered (spaces + 8, "is_private %d\n", |
| 1239 | TYPE_FN_FIELD_PRIVATE (f, overload_idx)); |
| 1240 | printfi_filtered (spaces + 8, "is_protected %d\n", |
| 1241 | TYPE_FN_FIELD_PROTECTED (f, overload_idx)); |
| 1242 | printfi_filtered (spaces + 8, "is_stub %d\n", |
| 1243 | TYPE_FN_FIELD_STUB (f, overload_idx)); |
| 1244 | printfi_filtered (spaces + 8, "voffset %u\n", |
| 1245 | TYPE_FN_FIELD_VOFFSET (f, overload_idx)); |
| 1246 | } |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | static void |
| 1251 | print_cplus_stuff (type, spaces) |
| 1252 | struct type *type; |
| 1253 | int spaces; |
| 1254 | { |
| 1255 | printfi_filtered (spaces, "n_baseclasses %d\n", |
| 1256 | TYPE_N_BASECLASSES (type)); |
| 1257 | printfi_filtered (spaces, "nfn_fields %d\n", |
| 1258 | TYPE_NFN_FIELDS (type)); |
| 1259 | printfi_filtered (spaces, "nfn_fields_total %d\n", |
| 1260 | TYPE_NFN_FIELDS_TOTAL (type)); |
| 1261 | if (TYPE_N_BASECLASSES (type) > 0) |
| 1262 | { |
| 1263 | printfi_filtered (spaces, "virtual_field_bits (%d bits at *0x%lx)", |
| 1264 | TYPE_N_BASECLASSES (type), |
| 1265 | (unsigned long) TYPE_FIELD_VIRTUAL_BITS (type)); |
| 1266 | print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type), |
| 1267 | TYPE_N_BASECLASSES (type)); |
| 1268 | puts_filtered ("\n"); |
| 1269 | } |
| 1270 | if (TYPE_NFIELDS (type) > 0) |
| 1271 | { |
| 1272 | if (TYPE_FIELD_PRIVATE_BITS (type) != NULL) |
| 1273 | { |
| 1274 | printfi_filtered (spaces, "private_field_bits (%d bits at *0x%lx)", |
| 1275 | TYPE_NFIELDS (type), |
| 1276 | (unsigned long) TYPE_FIELD_PRIVATE_BITS (type)); |
| 1277 | print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type), |
| 1278 | TYPE_NFIELDS (type)); |
| 1279 | puts_filtered ("\n"); |
| 1280 | } |
| 1281 | if (TYPE_FIELD_PROTECTED_BITS (type) != NULL) |
| 1282 | { |
| 1283 | printfi_filtered (spaces, "protected_field_bits (%d bits at *0x%lx)", |
| 1284 | TYPE_NFIELDS (type), |
| 1285 | (unsigned long) TYPE_FIELD_PROTECTED_BITS (type)); |
| 1286 | print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type), |
| 1287 | TYPE_NFIELDS (type)); |
| 1288 | puts_filtered ("\n"); |
| 1289 | } |
| 1290 | } |
| 1291 | if (TYPE_NFN_FIELDS (type) > 0) |
| 1292 | { |
| 1293 | dump_fn_fieldlists (type, spaces); |
| 1294 | } |
| 1295 | } |
| 1296 | |
| 1297 | void |
| 1298 | recursive_dump_type (type, spaces) |
| 1299 | struct type *type; |
| 1300 | int spaces; |
| 1301 | { |
| 1302 | int idx; |
| 1303 | |
| 1304 | printfi_filtered (spaces, "type node 0x%lx\n", (unsigned long)type); |
| 1305 | printfi_filtered (spaces, "name '%s' (0x%lx)\n", |
| 1306 | TYPE_NAME (type) ? TYPE_NAME (type) : "<NULL>", |
| 1307 | (unsigned long)TYPE_NAME (type)); |
| 1308 | if (TYPE_TAG_NAME (type) != NULL) |
| 1309 | printfi_filtered (spaces, "tagname '%s' (0x%lx)\n", |
| 1310 | TYPE_TAG_NAME (type), |
| 1311 | (unsigned long)TYPE_TAG_NAME (type)); |
| 1312 | printfi_filtered (spaces, "code 0x%x ", TYPE_CODE (type)); |
| 1313 | switch (TYPE_CODE (type)) |
| 1314 | { |
| 1315 | case TYPE_CODE_UNDEF: |
| 1316 | printf_filtered ("(TYPE_CODE_UNDEF)"); |
| 1317 | break; |
| 1318 | case TYPE_CODE_PTR: |
| 1319 | printf_filtered ("(TYPE_CODE_PTR)"); |
| 1320 | break; |
| 1321 | case TYPE_CODE_ARRAY: |
| 1322 | printf_filtered ("(TYPE_CODE_ARRAY)"); |
| 1323 | break; |
| 1324 | case TYPE_CODE_STRUCT: |
| 1325 | printf_filtered ("(TYPE_CODE_STRUCT)"); |
| 1326 | break; |
| 1327 | case TYPE_CODE_UNION: |
| 1328 | printf_filtered ("(TYPE_CODE_UNION)"); |
| 1329 | break; |
| 1330 | case TYPE_CODE_ENUM: |
| 1331 | printf_filtered ("(TYPE_CODE_ENUM)"); |
| 1332 | break; |
| 1333 | case TYPE_CODE_FUNC: |
| 1334 | printf_filtered ("(TYPE_CODE_FUNC)"); |
| 1335 | break; |
| 1336 | case TYPE_CODE_INT: |
| 1337 | printf_filtered ("(TYPE_CODE_INT)"); |
| 1338 | break; |
| 1339 | case TYPE_CODE_FLT: |
| 1340 | printf_filtered ("(TYPE_CODE_FLT)"); |
| 1341 | break; |
| 1342 | case TYPE_CODE_VOID: |
| 1343 | printf_filtered ("(TYPE_CODE_VOID)"); |
| 1344 | break; |
| 1345 | case TYPE_CODE_SET: |
| 1346 | printf_filtered ("(TYPE_CODE_SET)"); |
| 1347 | break; |
| 1348 | case TYPE_CODE_RANGE: |
| 1349 | printf_filtered ("(TYPE_CODE_RANGE)"); |
| 1350 | break; |
| 1351 | case TYPE_CODE_STRING: |
| 1352 | printf_filtered ("(TYPE_CODE_STRING)"); |
| 1353 | break; |
| 1354 | case TYPE_CODE_ERROR: |
| 1355 | printf_filtered ("(TYPE_CODE_ERROR)"); |
| 1356 | break; |
| 1357 | case TYPE_CODE_MEMBER: |
| 1358 | printf_filtered ("(TYPE_CODE_MEMBER)"); |
| 1359 | break; |
| 1360 | case TYPE_CODE_METHOD: |
| 1361 | printf_filtered ("(TYPE_CODE_METHOD)"); |
| 1362 | break; |
| 1363 | case TYPE_CODE_REF: |
| 1364 | printf_filtered ("(TYPE_CODE_REF)"); |
| 1365 | break; |
| 1366 | case TYPE_CODE_CHAR: |
| 1367 | printf_filtered ("(TYPE_CODE_CHAR)"); |
| 1368 | break; |
| 1369 | case TYPE_CODE_BOOL: |
| 1370 | printf_filtered ("(TYPE_CODE_BOOL)"); |
| 1371 | break; |
| 1372 | default: |
| 1373 | printf_filtered ("(UNKNOWN TYPE CODE)"); |
| 1374 | break; |
| 1375 | } |
| 1376 | puts_filtered ("\n"); |
| 1377 | printfi_filtered (spaces, "length %d\n", TYPE_LENGTH (type)); |
| 1378 | printfi_filtered (spaces, "objfile 0x%lx\n", |
| 1379 | (unsigned long) TYPE_OBJFILE (type)); |
| 1380 | printfi_filtered (spaces, "target_type 0x%lx\n", |
| 1381 | (unsigned long) TYPE_TARGET_TYPE (type)); |
| 1382 | if (TYPE_TARGET_TYPE (type) != NULL) |
| 1383 | { |
| 1384 | recursive_dump_type (TYPE_TARGET_TYPE (type), spaces + 2); |
| 1385 | } |
| 1386 | printfi_filtered (spaces, "pointer_type 0x%lx\n", |
| 1387 | (unsigned long) TYPE_POINTER_TYPE (type)); |
| 1388 | printfi_filtered (spaces, "reference_type 0x%lx\n", |
| 1389 | (unsigned long) TYPE_REFERENCE_TYPE (type)); |
| 1390 | printfi_filtered (spaces, "function_type 0x%lx\n", |
| 1391 | (unsigned long) TYPE_FUNCTION_TYPE (type)); |
| 1392 | printfi_filtered (spaces, "flags 0x%x", TYPE_FLAGS (type)); |
| 1393 | if (TYPE_FLAGS (type) & TYPE_FLAG_UNSIGNED) |
| 1394 | { |
| 1395 | puts_filtered (" TYPE_FLAG_UNSIGNED"); |
| 1396 | } |
| 1397 | if (TYPE_FLAGS (type) & TYPE_FLAG_STUB) |
| 1398 | { |
| 1399 | puts_filtered (" TYPE_FLAG_STUB"); |
| 1400 | } |
| 1401 | puts_filtered ("\n"); |
| 1402 | printfi_filtered (spaces, "nfields %d 0x%lx\n", TYPE_NFIELDS (type), |
| 1403 | (unsigned long) TYPE_FIELDS (type)); |
| 1404 | for (idx = 0; idx < TYPE_NFIELDS (type); idx++) |
| 1405 | { |
| 1406 | printfi_filtered (spaces + 2, |
| 1407 | "[%d] bitpos %d bitsize %d type 0x%lx name '%s' (0x%lx)\n", |
| 1408 | idx, TYPE_FIELD_BITPOS (type, idx), |
| 1409 | TYPE_FIELD_BITSIZE (type, idx), |
| 1410 | (unsigned long) TYPE_FIELD_TYPE (type, idx), |
| 1411 | TYPE_FIELD_NAME (type, idx) != NULL |
| 1412 | ? TYPE_FIELD_NAME (type, idx) |
| 1413 | : "<NULL>", |
| 1414 | (unsigned long) TYPE_FIELD_NAME (type, idx)); |
| 1415 | if (TYPE_FIELD_TYPE (type, idx) != NULL) |
| 1416 | { |
| 1417 | recursive_dump_type (TYPE_FIELD_TYPE (type, idx), spaces + 4); |
| 1418 | } |
| 1419 | } |
| 1420 | printfi_filtered (spaces, "vptr_basetype 0x%lx\n", |
| 1421 | (unsigned long) TYPE_VPTR_BASETYPE (type)); |
| 1422 | if (TYPE_VPTR_BASETYPE (type) != NULL) |
| 1423 | { |
| 1424 | recursive_dump_type (TYPE_VPTR_BASETYPE (type), spaces + 2); |
| 1425 | } |
| 1426 | printfi_filtered (spaces, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type)); |
| 1427 | switch (TYPE_CODE (type)) |
| 1428 | { |
| 1429 | case TYPE_CODE_METHOD: |
| 1430 | case TYPE_CODE_FUNC: |
| 1431 | printfi_filtered (spaces, "arg_types 0x%lx\n", |
| 1432 | (unsigned long) TYPE_ARG_TYPES (type)); |
| 1433 | print_arg_types (TYPE_ARG_TYPES (type), spaces); |
| 1434 | break; |
| 1435 | |
| 1436 | case TYPE_CODE_STRUCT: |
| 1437 | printfi_filtered (spaces, "cplus_stuff 0x%lx\n", |
| 1438 | (unsigned long) TYPE_CPLUS_SPECIFIC (type)); |
| 1439 | print_cplus_stuff (type, spaces); |
| 1440 | break; |
| 1441 | |
| 1442 | default: |
| 1443 | /* We have to pick one of the union types to be able print and test |
| 1444 | the value. Pick cplus_struct_type, even though we know it isn't |
| 1445 | any particular one. */ |
| 1446 | printfi_filtered (spaces, "type_specific 0x%lx", |
| 1447 | (unsigned long) TYPE_CPLUS_SPECIFIC (type)); |
| 1448 | if (TYPE_CPLUS_SPECIFIC (type) != NULL) |
| 1449 | { |
| 1450 | printf_filtered (" (unknown data form)"); |
| 1451 | } |
| 1452 | printf_filtered ("\n"); |
| 1453 | break; |
| 1454 | |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | #endif /* MAINTENANCE_CMDS */ |
| 1459 | |
| 1460 | void |
| 1461 | _initialize_gdbtypes () |
| 1462 | { |
| 1463 | builtin_type_void = |
| 1464 | init_type (TYPE_CODE_VOID, 1, |
| 1465 | 0, |
| 1466 | "void", (struct objfile *) NULL); |
| 1467 | builtin_type_char = |
| 1468 | init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 1469 | 0, |
| 1470 | "char", (struct objfile *) NULL); |
| 1471 | builtin_type_signed_char = |
| 1472 | init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 1473 | 0, |
| 1474 | "signed char", (struct objfile *) NULL); |
| 1475 | builtin_type_unsigned_char = |
| 1476 | init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 1477 | TYPE_FLAG_UNSIGNED, |
| 1478 | "unsigned char", (struct objfile *) NULL); |
| 1479 | builtin_type_short = |
| 1480 | init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 1481 | 0, |
| 1482 | "short", (struct objfile *) NULL); |
| 1483 | builtin_type_unsigned_short = |
| 1484 | init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 1485 | TYPE_FLAG_UNSIGNED, |
| 1486 | "unsigned short", (struct objfile *) NULL); |
| 1487 | builtin_type_int = |
| 1488 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 1489 | 0, |
| 1490 | "int", (struct objfile *) NULL); |
| 1491 | builtin_type_unsigned_int = |
| 1492 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 1493 | TYPE_FLAG_UNSIGNED, |
| 1494 | "unsigned int", (struct objfile *) NULL); |
| 1495 | builtin_type_long = |
| 1496 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 1497 | 0, |
| 1498 | "long", (struct objfile *) NULL); |
| 1499 | builtin_type_unsigned_long = |
| 1500 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 1501 | TYPE_FLAG_UNSIGNED, |
| 1502 | "unsigned long", (struct objfile *) NULL); |
| 1503 | builtin_type_long_long = |
| 1504 | init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 1505 | 0, |
| 1506 | "long long", (struct objfile *) NULL); |
| 1507 | builtin_type_unsigned_long_long = |
| 1508 | init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 1509 | TYPE_FLAG_UNSIGNED, |
| 1510 | "unsigned long long", (struct objfile *) NULL); |
| 1511 | builtin_type_float = |
| 1512 | init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, |
| 1513 | 0, |
| 1514 | "float", (struct objfile *) NULL); |
| 1515 | builtin_type_double = |
| 1516 | init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 1517 | 0, |
| 1518 | "double", (struct objfile *) NULL); |
| 1519 | builtin_type_long_double = |
| 1520 | init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 1521 | 0, |
| 1522 | "long double", (struct objfile *) NULL); |
| 1523 | builtin_type_complex = |
| 1524 | init_type (TYPE_CODE_FLT, TARGET_COMPLEX_BIT / TARGET_CHAR_BIT, |
| 1525 | 0, |
| 1526 | "complex", (struct objfile *) NULL); |
| 1527 | builtin_type_double_complex = |
| 1528 | init_type (TYPE_CODE_FLT, TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT, |
| 1529 | 0, |
| 1530 | "double complex", (struct objfile *) NULL); |
| 1531 | builtin_type_string = |
| 1532 | init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 1533 | 0, |
| 1534 | "string", (struct objfile *) NULL); |
| 1535 | } |