| 1 | /* Scheme interface to types. |
| 2 | |
| 3 | Copyright (C) 2008-2020 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 | /* See README file in this directory for implementation notes, coding |
| 21 | conventions, et.al. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "arch-utils.h" |
| 25 | #include "value.h" |
| 26 | #include "gdbtypes.h" |
| 27 | #include "objfiles.h" |
| 28 | #include "language.h" |
| 29 | #include "bcache.h" |
| 30 | #include "dwarf2/loc.h" |
| 31 | #include "typeprint.h" |
| 32 | #include "guile-internal.h" |
| 33 | |
| 34 | /* The <gdb:type> smob. |
| 35 | The type is chained with all types associated with its objfile, if any. |
| 36 | This lets us copy the underlying struct type when the objfile is |
| 37 | deleted. |
| 38 | The typedef for this struct is in guile-internal.h. */ |
| 39 | |
| 40 | struct _type_smob |
| 41 | { |
| 42 | /* This always appears first. |
| 43 | eqable_gdb_smob is used so that types are eq?-able. |
| 44 | Also, a type object can be associated with an objfile. eqable_gdb_smob |
| 45 | lets us track the lifetime of all types associated with an objfile. |
| 46 | When an objfile is deleted we need to invalidate the type object. */ |
| 47 | eqable_gdb_smob base; |
| 48 | |
| 49 | /* The GDB type structure this smob is wrapping. */ |
| 50 | struct type *type; |
| 51 | }; |
| 52 | |
| 53 | /* A field smob. */ |
| 54 | |
| 55 | typedef struct |
| 56 | { |
| 57 | /* This always appears first. */ |
| 58 | gdb_smob base; |
| 59 | |
| 60 | /* Backlink to the containing <gdb:type> object. */ |
| 61 | SCM type_scm; |
| 62 | |
| 63 | /* The field number in TYPE_SCM. */ |
| 64 | int field_num; |
| 65 | } field_smob; |
| 66 | |
| 67 | static const char type_smob_name[] = "gdb:type"; |
| 68 | static const char field_smob_name[] = "gdb:field"; |
| 69 | |
| 70 | static const char not_composite_error[] = |
| 71 | N_("type is not a structure, union, or enum type"); |
| 72 | |
| 73 | /* The tag Guile knows the type smob by. */ |
| 74 | static scm_t_bits type_smob_tag; |
| 75 | |
| 76 | /* The tag Guile knows the field smob by. */ |
| 77 | static scm_t_bits field_smob_tag; |
| 78 | |
| 79 | /* The "next" procedure for field iterators. */ |
| 80 | static SCM tyscm_next_field_x_proc; |
| 81 | |
| 82 | /* Keywords used in argument passing. */ |
| 83 | static SCM block_keyword; |
| 84 | |
| 85 | static const struct objfile_data *tyscm_objfile_data_key; |
| 86 | |
| 87 | /* Hash table to uniquify global (non-objfile-owned) types. */ |
| 88 | static htab_t global_types_map; |
| 89 | |
| 90 | static struct type *tyscm_get_composite (struct type *type); |
| 91 | |
| 92 | /* Return the type field of T_SMOB. |
| 93 | This exists so that we don't have to export the struct's contents. */ |
| 94 | |
| 95 | struct type * |
| 96 | tyscm_type_smob_type (type_smob *t_smob) |
| 97 | { |
| 98 | return t_smob->type; |
| 99 | } |
| 100 | |
| 101 | /* Return the name of TYPE in expanded form. If there's an error |
| 102 | computing the name, throws the gdb exception with scm_throw. */ |
| 103 | |
| 104 | static std::string |
| 105 | tyscm_type_name (struct type *type) |
| 106 | { |
| 107 | SCM excp; |
| 108 | try |
| 109 | { |
| 110 | string_file stb; |
| 111 | |
| 112 | LA_PRINT_TYPE (type, "", &stb, -1, 0, &type_print_raw_options); |
| 113 | return std::move (stb.string ()); |
| 114 | } |
| 115 | catch (const gdb_exception &except) |
| 116 | { |
| 117 | excp = gdbscm_scm_from_gdb_exception (unpack (except)); |
| 118 | } |
| 119 | |
| 120 | gdbscm_throw (excp); |
| 121 | } |
| 122 | \f |
| 123 | /* Administrivia for type smobs. */ |
| 124 | |
| 125 | /* Helper function to hash a type_smob. */ |
| 126 | |
| 127 | static hashval_t |
| 128 | tyscm_hash_type_smob (const void *p) |
| 129 | { |
| 130 | const type_smob *t_smob = (const type_smob *) p; |
| 131 | |
| 132 | return htab_hash_pointer (t_smob->type); |
| 133 | } |
| 134 | |
| 135 | /* Helper function to compute equality of type_smobs. */ |
| 136 | |
| 137 | static int |
| 138 | tyscm_eq_type_smob (const void *ap, const void *bp) |
| 139 | { |
| 140 | const type_smob *a = (const type_smob *) ap; |
| 141 | const type_smob *b = (const type_smob *) bp; |
| 142 | |
| 143 | return (a->type == b->type |
| 144 | && a->type != NULL); |
| 145 | } |
| 146 | |
| 147 | /* Return the struct type pointer -> SCM mapping table. |
| 148 | If type is owned by an objfile, the mapping table is created if necessary. |
| 149 | Otherwise, type is not owned by an objfile, and we use |
| 150 | global_types_map. */ |
| 151 | |
| 152 | static htab_t |
| 153 | tyscm_type_map (struct type *type) |
| 154 | { |
| 155 | struct objfile *objfile = TYPE_OBJFILE (type); |
| 156 | htab_t htab; |
| 157 | |
| 158 | if (objfile == NULL) |
| 159 | return global_types_map; |
| 160 | |
| 161 | htab = (htab_t) objfile_data (objfile, tyscm_objfile_data_key); |
| 162 | if (htab == NULL) |
| 163 | { |
| 164 | htab = gdbscm_create_eqable_gsmob_ptr_map (tyscm_hash_type_smob, |
| 165 | tyscm_eq_type_smob); |
| 166 | set_objfile_data (objfile, tyscm_objfile_data_key, htab); |
| 167 | } |
| 168 | |
| 169 | return htab; |
| 170 | } |
| 171 | |
| 172 | /* The smob "free" function for <gdb:type>. */ |
| 173 | |
| 174 | static size_t |
| 175 | tyscm_free_type_smob (SCM self) |
| 176 | { |
| 177 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (self); |
| 178 | |
| 179 | if (t_smob->type != NULL) |
| 180 | { |
| 181 | htab_t htab = tyscm_type_map (t_smob->type); |
| 182 | |
| 183 | gdbscm_clear_eqable_gsmob_ptr_slot (htab, &t_smob->base); |
| 184 | } |
| 185 | |
| 186 | /* Not necessary, done to catch bugs. */ |
| 187 | t_smob->type = NULL; |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | /* The smob "print" function for <gdb:type>. */ |
| 193 | |
| 194 | static int |
| 195 | tyscm_print_type_smob (SCM self, SCM port, scm_print_state *pstate) |
| 196 | { |
| 197 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (self); |
| 198 | std::string name = tyscm_type_name (t_smob->type); |
| 199 | |
| 200 | /* pstate->writingp = zero if invoked by display/~A, and nonzero if |
| 201 | invoked by write/~S. What to do here may need to evolve. |
| 202 | IWBN if we could pass an argument to format that would we could use |
| 203 | instead of writingp. */ |
| 204 | if (pstate->writingp) |
| 205 | gdbscm_printf (port, "#<%s ", type_smob_name); |
| 206 | |
| 207 | scm_puts (name.c_str (), port); |
| 208 | |
| 209 | if (pstate->writingp) |
| 210 | scm_puts (">", port); |
| 211 | |
| 212 | scm_remember_upto_here_1 (self); |
| 213 | |
| 214 | /* Non-zero means success. */ |
| 215 | return 1; |
| 216 | } |
| 217 | |
| 218 | /* The smob "equal?" function for <gdb:type>. */ |
| 219 | |
| 220 | static SCM |
| 221 | tyscm_equal_p_type_smob (SCM type1_scm, SCM type2_scm) |
| 222 | { |
| 223 | type_smob *type1_smob, *type2_smob; |
| 224 | struct type *type1, *type2; |
| 225 | bool result = false; |
| 226 | |
| 227 | SCM_ASSERT_TYPE (tyscm_is_type (type1_scm), type1_scm, SCM_ARG1, FUNC_NAME, |
| 228 | type_smob_name); |
| 229 | SCM_ASSERT_TYPE (tyscm_is_type (type2_scm), type2_scm, SCM_ARG2, FUNC_NAME, |
| 230 | type_smob_name); |
| 231 | type1_smob = (type_smob *) SCM_SMOB_DATA (type1_scm); |
| 232 | type2_smob = (type_smob *) SCM_SMOB_DATA (type2_scm); |
| 233 | type1 = type1_smob->type; |
| 234 | type2 = type2_smob->type; |
| 235 | |
| 236 | gdbscm_gdb_exception exc {}; |
| 237 | try |
| 238 | { |
| 239 | result = types_deeply_equal (type1, type2); |
| 240 | } |
| 241 | catch (const gdb_exception &except) |
| 242 | { |
| 243 | exc = unpack (except); |
| 244 | } |
| 245 | |
| 246 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 247 | return scm_from_bool (result); |
| 248 | } |
| 249 | |
| 250 | /* Low level routine to create a <gdb:type> object. */ |
| 251 | |
| 252 | static SCM |
| 253 | tyscm_make_type_smob (void) |
| 254 | { |
| 255 | type_smob *t_smob = (type_smob *) |
| 256 | scm_gc_malloc (sizeof (type_smob), type_smob_name); |
| 257 | SCM t_scm; |
| 258 | |
| 259 | /* This must be filled in by the caller. */ |
| 260 | t_smob->type = NULL; |
| 261 | |
| 262 | t_scm = scm_new_smob (type_smob_tag, (scm_t_bits) t_smob); |
| 263 | gdbscm_init_eqable_gsmob (&t_smob->base, t_scm); |
| 264 | |
| 265 | return t_scm; |
| 266 | } |
| 267 | |
| 268 | /* Return non-zero if SCM is a <gdb:type> object. */ |
| 269 | |
| 270 | int |
| 271 | tyscm_is_type (SCM self) |
| 272 | { |
| 273 | return SCM_SMOB_PREDICATE (type_smob_tag, self); |
| 274 | } |
| 275 | |
| 276 | /* (type? object) -> boolean */ |
| 277 | |
| 278 | static SCM |
| 279 | gdbscm_type_p (SCM self) |
| 280 | { |
| 281 | return scm_from_bool (tyscm_is_type (self)); |
| 282 | } |
| 283 | |
| 284 | /* Return the existing object that encapsulates TYPE, or create a new |
| 285 | <gdb:type> object. */ |
| 286 | |
| 287 | SCM |
| 288 | tyscm_scm_from_type (struct type *type) |
| 289 | { |
| 290 | htab_t htab; |
| 291 | eqable_gdb_smob **slot; |
| 292 | type_smob *t_smob, t_smob_for_lookup; |
| 293 | SCM t_scm; |
| 294 | |
| 295 | /* If we've already created a gsmob for this type, return it. |
| 296 | This makes types eq?-able. */ |
| 297 | htab = tyscm_type_map (type); |
| 298 | t_smob_for_lookup.type = type; |
| 299 | slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &t_smob_for_lookup.base); |
| 300 | if (*slot != NULL) |
| 301 | return (*slot)->containing_scm; |
| 302 | |
| 303 | t_scm = tyscm_make_type_smob (); |
| 304 | t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 305 | t_smob->type = type; |
| 306 | gdbscm_fill_eqable_gsmob_ptr_slot (slot, &t_smob->base); |
| 307 | |
| 308 | return t_scm; |
| 309 | } |
| 310 | |
| 311 | /* Returns the <gdb:type> object in SELF. |
| 312 | Throws an exception if SELF is not a <gdb:type> object. */ |
| 313 | |
| 314 | static SCM |
| 315 | tyscm_get_type_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 316 | { |
| 317 | SCM_ASSERT_TYPE (tyscm_is_type (self), self, arg_pos, func_name, |
| 318 | type_smob_name); |
| 319 | |
| 320 | return self; |
| 321 | } |
| 322 | |
| 323 | /* Returns a pointer to the type smob of SELF. |
| 324 | Throws an exception if SELF is not a <gdb:type> object. */ |
| 325 | |
| 326 | type_smob * |
| 327 | tyscm_get_type_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 328 | { |
| 329 | SCM t_scm = tyscm_get_type_arg_unsafe (self, arg_pos, func_name); |
| 330 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 331 | |
| 332 | return t_smob; |
| 333 | } |
| 334 | |
| 335 | /* Return the type field of T_SCM, an object of type <gdb:type>. |
| 336 | This exists so that we don't have to export the struct's contents. */ |
| 337 | |
| 338 | struct type * |
| 339 | tyscm_scm_to_type (SCM t_scm) |
| 340 | { |
| 341 | type_smob *t_smob; |
| 342 | |
| 343 | gdb_assert (tyscm_is_type (t_scm)); |
| 344 | t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 345 | return t_smob->type; |
| 346 | } |
| 347 | |
| 348 | /* Helper function for save_objfile_types to make a deep copy of the type. */ |
| 349 | |
| 350 | static int |
| 351 | tyscm_copy_type_recursive (void **slot, void *info) |
| 352 | { |
| 353 | type_smob *t_smob = (type_smob *) *slot; |
| 354 | htab_t copied_types = (htab_t) info; |
| 355 | struct objfile *objfile = TYPE_OBJFILE (t_smob->type); |
| 356 | htab_t htab; |
| 357 | eqable_gdb_smob **new_slot; |
| 358 | type_smob t_smob_for_lookup; |
| 359 | |
| 360 | gdb_assert (objfile != NULL); |
| 361 | |
| 362 | htab_empty (copied_types); |
| 363 | t_smob->type = copy_type_recursive (objfile, t_smob->type, copied_types); |
| 364 | |
| 365 | /* The eq?-hashtab that the type lived in is going away. |
| 366 | Add the type to its new eq?-hashtab: Otherwise if/when the type is later |
| 367 | garbage collected we'll assert-fail if the type isn't in the hashtab. |
| 368 | PR 16612. |
| 369 | |
| 370 | Types now live in "arch space", and things like "char" that came from |
| 371 | the objfile *could* be considered eq? with the arch "char" type. |
| 372 | However, they weren't before the objfile got deleted, so making them |
| 373 | eq? now is debatable. */ |
| 374 | htab = tyscm_type_map (t_smob->type); |
| 375 | t_smob_for_lookup.type = t_smob->type; |
| 376 | new_slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &t_smob_for_lookup.base); |
| 377 | gdb_assert (*new_slot == NULL); |
| 378 | gdbscm_fill_eqable_gsmob_ptr_slot (new_slot, &t_smob->base); |
| 379 | |
| 380 | return 1; |
| 381 | } |
| 382 | |
| 383 | /* Called when OBJFILE is about to be deleted. |
| 384 | Make a copy of all types associated with OBJFILE. */ |
| 385 | |
| 386 | static void |
| 387 | save_objfile_types (struct objfile *objfile, void *datum) |
| 388 | { |
| 389 | htab_t htab = (htab_t) datum; |
| 390 | |
| 391 | if (!gdb_scheme_initialized) |
| 392 | return; |
| 393 | |
| 394 | htab_up copied_types = create_copied_types_hash (objfile); |
| 395 | |
| 396 | if (htab != NULL) |
| 397 | { |
| 398 | htab_traverse_noresize (htab, tyscm_copy_type_recursive, copied_types.get ()); |
| 399 | htab_delete (htab); |
| 400 | } |
| 401 | } |
| 402 | \f |
| 403 | /* Administrivia for field smobs. */ |
| 404 | |
| 405 | /* The smob "print" function for <gdb:field>. */ |
| 406 | |
| 407 | static int |
| 408 | tyscm_print_field_smob (SCM self, SCM port, scm_print_state *pstate) |
| 409 | { |
| 410 | field_smob *f_smob = (field_smob *) SCM_SMOB_DATA (self); |
| 411 | |
| 412 | gdbscm_printf (port, "#<%s ", field_smob_name); |
| 413 | scm_write (f_smob->type_scm, port); |
| 414 | gdbscm_printf (port, " %d", f_smob->field_num); |
| 415 | scm_puts (">", port); |
| 416 | |
| 417 | scm_remember_upto_here_1 (self); |
| 418 | |
| 419 | /* Non-zero means success. */ |
| 420 | return 1; |
| 421 | } |
| 422 | |
| 423 | /* Low level routine to create a <gdb:field> object for field FIELD_NUM |
| 424 | of type TYPE_SCM. */ |
| 425 | |
| 426 | static SCM |
| 427 | tyscm_make_field_smob (SCM type_scm, int field_num) |
| 428 | { |
| 429 | field_smob *f_smob = (field_smob *) |
| 430 | scm_gc_malloc (sizeof (field_smob), field_smob_name); |
| 431 | SCM result; |
| 432 | |
| 433 | f_smob->type_scm = type_scm; |
| 434 | f_smob->field_num = field_num; |
| 435 | result = scm_new_smob (field_smob_tag, (scm_t_bits) f_smob); |
| 436 | gdbscm_init_gsmob (&f_smob->base); |
| 437 | |
| 438 | return result; |
| 439 | } |
| 440 | |
| 441 | /* Return non-zero if SCM is a <gdb:field> object. */ |
| 442 | |
| 443 | static int |
| 444 | tyscm_is_field (SCM self) |
| 445 | { |
| 446 | return SCM_SMOB_PREDICATE (field_smob_tag, self); |
| 447 | } |
| 448 | |
| 449 | /* (field? object) -> boolean */ |
| 450 | |
| 451 | static SCM |
| 452 | gdbscm_field_p (SCM self) |
| 453 | { |
| 454 | return scm_from_bool (tyscm_is_field (self)); |
| 455 | } |
| 456 | |
| 457 | /* Create a new <gdb:field> object that encapsulates field FIELD_NUM |
| 458 | in type TYPE_SCM. */ |
| 459 | |
| 460 | SCM |
| 461 | tyscm_scm_from_field (SCM type_scm, int field_num) |
| 462 | { |
| 463 | return tyscm_make_field_smob (type_scm, field_num); |
| 464 | } |
| 465 | |
| 466 | /* Returns the <gdb:field> object in SELF. |
| 467 | Throws an exception if SELF is not a <gdb:field> object. */ |
| 468 | |
| 469 | static SCM |
| 470 | tyscm_get_field_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 471 | { |
| 472 | SCM_ASSERT_TYPE (tyscm_is_field (self), self, arg_pos, func_name, |
| 473 | field_smob_name); |
| 474 | |
| 475 | return self; |
| 476 | } |
| 477 | |
| 478 | /* Returns a pointer to the field smob of SELF. |
| 479 | Throws an exception if SELF is not a <gdb:field> object. */ |
| 480 | |
| 481 | static field_smob * |
| 482 | tyscm_get_field_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 483 | { |
| 484 | SCM f_scm = tyscm_get_field_arg_unsafe (self, arg_pos, func_name); |
| 485 | field_smob *f_smob = (field_smob *) SCM_SMOB_DATA (f_scm); |
| 486 | |
| 487 | return f_smob; |
| 488 | } |
| 489 | |
| 490 | /* Returns a pointer to the type struct in F_SMOB |
| 491 | (the type the field is in). */ |
| 492 | |
| 493 | static struct type * |
| 494 | tyscm_field_smob_containing_type (field_smob *f_smob) |
| 495 | { |
| 496 | type_smob *t_smob; |
| 497 | |
| 498 | gdb_assert (tyscm_is_type (f_smob->type_scm)); |
| 499 | t_smob = (type_smob *) SCM_SMOB_DATA (f_smob->type_scm); |
| 500 | |
| 501 | return t_smob->type; |
| 502 | } |
| 503 | |
| 504 | /* Returns a pointer to the field struct of F_SMOB. */ |
| 505 | |
| 506 | static struct field * |
| 507 | tyscm_field_smob_to_field (field_smob *f_smob) |
| 508 | { |
| 509 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 510 | |
| 511 | /* This should be non-NULL by construction. */ |
| 512 | gdb_assert (type->fields () != NULL); |
| 513 | |
| 514 | return &type->field (f_smob->field_num); |
| 515 | } |
| 516 | \f |
| 517 | /* Type smob accessors. */ |
| 518 | |
| 519 | /* (type-code <gdb:type>) -> integer |
| 520 | Return the code for this type. */ |
| 521 | |
| 522 | static SCM |
| 523 | gdbscm_type_code (SCM self) |
| 524 | { |
| 525 | type_smob *t_smob |
| 526 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 527 | struct type *type = t_smob->type; |
| 528 | |
| 529 | return scm_from_int (type->code ()); |
| 530 | } |
| 531 | |
| 532 | /* (type-fields <gdb:type>) -> list |
| 533 | Return a list of all fields. Each element is a <gdb:field> object. |
| 534 | This also supports arrays, we return a field list of one element, |
| 535 | the range type. */ |
| 536 | |
| 537 | static SCM |
| 538 | gdbscm_type_fields (SCM self) |
| 539 | { |
| 540 | type_smob *t_smob |
| 541 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 542 | struct type *type = t_smob->type; |
| 543 | struct type *containing_type; |
| 544 | SCM containing_type_scm, result; |
| 545 | int i; |
| 546 | |
| 547 | containing_type = tyscm_get_composite (type); |
| 548 | if (containing_type == NULL) |
| 549 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 550 | _(not_composite_error)); |
| 551 | |
| 552 | /* If SELF is a typedef or reference, we want the underlying type, |
| 553 | which is what tyscm_get_composite returns. */ |
| 554 | if (containing_type == type) |
| 555 | containing_type_scm = self; |
| 556 | else |
| 557 | containing_type_scm = tyscm_scm_from_type (containing_type); |
| 558 | |
| 559 | result = SCM_EOL; |
| 560 | for (i = 0; i < containing_type->num_fields (); ++i) |
| 561 | result = scm_cons (tyscm_make_field_smob (containing_type_scm, i), result); |
| 562 | |
| 563 | return scm_reverse_x (result, SCM_EOL); |
| 564 | } |
| 565 | |
| 566 | /* (type-tag <gdb:type>) -> string |
| 567 | Return the type's tag, or #f. */ |
| 568 | |
| 569 | static SCM |
| 570 | gdbscm_type_tag (SCM self) |
| 571 | { |
| 572 | type_smob *t_smob |
| 573 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 574 | struct type *type = t_smob->type; |
| 575 | const char *tagname = nullptr; |
| 576 | |
| 577 | if (type->code () == TYPE_CODE_STRUCT |
| 578 | || type->code () == TYPE_CODE_UNION |
| 579 | || type->code () == TYPE_CODE_ENUM) |
| 580 | tagname = type->name (); |
| 581 | |
| 582 | if (tagname == nullptr) |
| 583 | return SCM_BOOL_F; |
| 584 | return gdbscm_scm_from_c_string (tagname); |
| 585 | } |
| 586 | |
| 587 | /* (type-name <gdb:type>) -> string |
| 588 | Return the type's name, or #f. */ |
| 589 | |
| 590 | static SCM |
| 591 | gdbscm_type_name (SCM self) |
| 592 | { |
| 593 | type_smob *t_smob |
| 594 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 595 | struct type *type = t_smob->type; |
| 596 | |
| 597 | if (!type->name ()) |
| 598 | return SCM_BOOL_F; |
| 599 | return gdbscm_scm_from_c_string (type->name ()); |
| 600 | } |
| 601 | |
| 602 | /* (type-print-name <gdb:type>) -> string |
| 603 | Return the print name of type. |
| 604 | TODO: template support elided for now. */ |
| 605 | |
| 606 | static SCM |
| 607 | gdbscm_type_print_name (SCM self) |
| 608 | { |
| 609 | type_smob *t_smob |
| 610 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 611 | struct type *type = t_smob->type; |
| 612 | std::string thetype = tyscm_type_name (type); |
| 613 | SCM result = gdbscm_scm_from_c_string (thetype.c_str ()); |
| 614 | |
| 615 | return result; |
| 616 | } |
| 617 | |
| 618 | /* (type-sizeof <gdb:type>) -> integer |
| 619 | Return the size of the type represented by SELF, in bytes. */ |
| 620 | |
| 621 | static SCM |
| 622 | gdbscm_type_sizeof (SCM self) |
| 623 | { |
| 624 | type_smob *t_smob |
| 625 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 626 | struct type *type = t_smob->type; |
| 627 | |
| 628 | try |
| 629 | { |
| 630 | check_typedef (type); |
| 631 | } |
| 632 | catch (const gdb_exception &except) |
| 633 | { |
| 634 | } |
| 635 | |
| 636 | /* Ignore exceptions. */ |
| 637 | |
| 638 | return scm_from_long (TYPE_LENGTH (type)); |
| 639 | } |
| 640 | |
| 641 | /* (type-strip-typedefs <gdb:type>) -> <gdb:type> |
| 642 | Return the type, stripped of typedefs. */ |
| 643 | |
| 644 | static SCM |
| 645 | gdbscm_type_strip_typedefs (SCM self) |
| 646 | { |
| 647 | type_smob *t_smob |
| 648 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 649 | struct type *type = t_smob->type; |
| 650 | |
| 651 | gdbscm_gdb_exception exc {}; |
| 652 | try |
| 653 | { |
| 654 | type = check_typedef (type); |
| 655 | } |
| 656 | catch (const gdb_exception &except) |
| 657 | { |
| 658 | exc = unpack (except); |
| 659 | } |
| 660 | |
| 661 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 662 | return tyscm_scm_from_type (type); |
| 663 | } |
| 664 | |
| 665 | /* Strip typedefs and pointers/reference from a type. Then check that |
| 666 | it is a struct, union, or enum type. If not, return NULL. */ |
| 667 | |
| 668 | static struct type * |
| 669 | tyscm_get_composite (struct type *type) |
| 670 | { |
| 671 | |
| 672 | for (;;) |
| 673 | { |
| 674 | gdbscm_gdb_exception exc {}; |
| 675 | try |
| 676 | { |
| 677 | type = check_typedef (type); |
| 678 | } |
| 679 | catch (const gdb_exception &except) |
| 680 | { |
| 681 | exc = unpack (except); |
| 682 | } |
| 683 | |
| 684 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 685 | if (type->code () != TYPE_CODE_PTR |
| 686 | && type->code () != TYPE_CODE_REF) |
| 687 | break; |
| 688 | type = TYPE_TARGET_TYPE (type); |
| 689 | } |
| 690 | |
| 691 | /* If this is not a struct, union, or enum type, raise TypeError |
| 692 | exception. */ |
| 693 | if (type->code () != TYPE_CODE_STRUCT |
| 694 | && type->code () != TYPE_CODE_UNION |
| 695 | && type->code () != TYPE_CODE_ENUM) |
| 696 | return NULL; |
| 697 | |
| 698 | return type; |
| 699 | } |
| 700 | |
| 701 | /* Helper for tyscm_array and tyscm_vector. */ |
| 702 | |
| 703 | static SCM |
| 704 | tyscm_array_1 (SCM self, SCM n1_scm, SCM n2_scm, int is_vector, |
| 705 | const char *func_name) |
| 706 | { |
| 707 | type_smob *t_smob |
| 708 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, func_name); |
| 709 | struct type *type = t_smob->type; |
| 710 | long n1, n2 = 0; |
| 711 | struct type *array = NULL; |
| 712 | |
| 713 | gdbscm_parse_function_args (func_name, SCM_ARG2, NULL, "l|l", |
| 714 | n1_scm, &n1, n2_scm, &n2); |
| 715 | |
| 716 | if (SCM_UNBNDP (n2_scm)) |
| 717 | { |
| 718 | n2 = n1; |
| 719 | n1 = 0; |
| 720 | } |
| 721 | |
| 722 | if (n2 < n1 - 1) /* Note: An empty array has n2 == n1 - 1. */ |
| 723 | { |
| 724 | gdbscm_out_of_range_error (func_name, SCM_ARG3, |
| 725 | scm_cons (scm_from_long (n1), |
| 726 | scm_from_long (n2)), |
| 727 | _("Array length must not be negative")); |
| 728 | } |
| 729 | |
| 730 | gdbscm_gdb_exception exc {}; |
| 731 | try |
| 732 | { |
| 733 | array = lookup_array_range_type (type, n1, n2); |
| 734 | if (is_vector) |
| 735 | make_vector_type (array); |
| 736 | } |
| 737 | catch (const gdb_exception &except) |
| 738 | { |
| 739 | exc = unpack (except); |
| 740 | } |
| 741 | |
| 742 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 743 | return tyscm_scm_from_type (array); |
| 744 | } |
| 745 | |
| 746 | /* (type-array <gdb:type> [low-bound] high-bound) -> <gdb:type> |
| 747 | The array has indices [low-bound,high-bound]. |
| 748 | If low-bound is not provided zero is used. |
| 749 | Return an array type. |
| 750 | |
| 751 | IWBN if the one argument version specified a size, not the high bound. |
| 752 | It's too easy to pass one argument thinking it is the size of the array. |
| 753 | The current semantics are for compatibility with the Python version. |
| 754 | Later we can add #:size. */ |
| 755 | |
| 756 | static SCM |
| 757 | gdbscm_type_array (SCM self, SCM n1, SCM n2) |
| 758 | { |
| 759 | return tyscm_array_1 (self, n1, n2, 0, FUNC_NAME); |
| 760 | } |
| 761 | |
| 762 | /* (type-vector <gdb:type> [low-bound] high-bound) -> <gdb:type> |
| 763 | The array has indices [low-bound,high-bound]. |
| 764 | If low-bound is not provided zero is used. |
| 765 | Return a vector type. |
| 766 | |
| 767 | IWBN if the one argument version specified a size, not the high bound. |
| 768 | It's too easy to pass one argument thinking it is the size of the array. |
| 769 | The current semantics are for compatibility with the Python version. |
| 770 | Later we can add #:size. */ |
| 771 | |
| 772 | static SCM |
| 773 | gdbscm_type_vector (SCM self, SCM n1, SCM n2) |
| 774 | { |
| 775 | return tyscm_array_1 (self, n1, n2, 1, FUNC_NAME); |
| 776 | } |
| 777 | |
| 778 | /* (type-pointer <gdb:type>) -> <gdb:type> |
| 779 | Return a <gdb:type> object which represents a pointer to SELF. */ |
| 780 | |
| 781 | static SCM |
| 782 | gdbscm_type_pointer (SCM self) |
| 783 | { |
| 784 | type_smob *t_smob |
| 785 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 786 | struct type *type = t_smob->type; |
| 787 | |
| 788 | gdbscm_gdb_exception exc {}; |
| 789 | try |
| 790 | { |
| 791 | type = lookup_pointer_type (type); |
| 792 | } |
| 793 | catch (const gdb_exception &except) |
| 794 | { |
| 795 | exc = unpack (except); |
| 796 | } |
| 797 | |
| 798 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 799 | return tyscm_scm_from_type (type); |
| 800 | } |
| 801 | |
| 802 | /* (type-range <gdb:type>) -> (low high) |
| 803 | Return the range of a type represented by SELF. The return type is |
| 804 | a list. The first element is the low bound, and the second element |
| 805 | is the high bound. */ |
| 806 | |
| 807 | static SCM |
| 808 | gdbscm_type_range (SCM self) |
| 809 | { |
| 810 | type_smob *t_smob |
| 811 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 812 | struct type *type = t_smob->type; |
| 813 | SCM low_scm, high_scm; |
| 814 | /* Initialize these to appease GCC warnings. */ |
| 815 | LONGEST low = 0, high = 0; |
| 816 | |
| 817 | SCM_ASSERT_TYPE (type->code () == TYPE_CODE_ARRAY |
| 818 | || type->code () == TYPE_CODE_STRING |
| 819 | || type->code () == TYPE_CODE_RANGE, |
| 820 | self, SCM_ARG1, FUNC_NAME, _("ranged type")); |
| 821 | |
| 822 | switch (type->code ()) |
| 823 | { |
| 824 | case TYPE_CODE_ARRAY: |
| 825 | case TYPE_CODE_STRING: |
| 826 | case TYPE_CODE_RANGE: |
| 827 | low = type->bounds ()->low.const_val (); |
| 828 | high = type->bounds ()->high.const_val (); |
| 829 | break; |
| 830 | } |
| 831 | |
| 832 | low_scm = gdbscm_scm_from_longest (low); |
| 833 | high_scm = gdbscm_scm_from_longest (high); |
| 834 | |
| 835 | return scm_list_2 (low_scm, high_scm); |
| 836 | } |
| 837 | |
| 838 | /* (type-reference <gdb:type>) -> <gdb:type> |
| 839 | Return a <gdb:type> object which represents a reference to SELF. */ |
| 840 | |
| 841 | static SCM |
| 842 | gdbscm_type_reference (SCM self) |
| 843 | { |
| 844 | type_smob *t_smob |
| 845 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 846 | struct type *type = t_smob->type; |
| 847 | |
| 848 | gdbscm_gdb_exception exc {}; |
| 849 | try |
| 850 | { |
| 851 | type = lookup_lvalue_reference_type (type); |
| 852 | } |
| 853 | catch (const gdb_exception &except) |
| 854 | { |
| 855 | exc = unpack (except); |
| 856 | } |
| 857 | |
| 858 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 859 | return tyscm_scm_from_type (type); |
| 860 | } |
| 861 | |
| 862 | /* (type-target <gdb:type>) -> <gdb:type> |
| 863 | Return a <gdb:type> object which represents the target type of SELF. */ |
| 864 | |
| 865 | static SCM |
| 866 | gdbscm_type_target (SCM self) |
| 867 | { |
| 868 | type_smob *t_smob |
| 869 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 870 | struct type *type = t_smob->type; |
| 871 | |
| 872 | SCM_ASSERT (TYPE_TARGET_TYPE (type), self, SCM_ARG1, FUNC_NAME); |
| 873 | |
| 874 | return tyscm_scm_from_type (TYPE_TARGET_TYPE (type)); |
| 875 | } |
| 876 | |
| 877 | /* (type-const <gdb:type>) -> <gdb:type> |
| 878 | Return a const-qualified type variant. */ |
| 879 | |
| 880 | static SCM |
| 881 | gdbscm_type_const (SCM self) |
| 882 | { |
| 883 | type_smob *t_smob |
| 884 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 885 | struct type *type = t_smob->type; |
| 886 | |
| 887 | gdbscm_gdb_exception exc {}; |
| 888 | try |
| 889 | { |
| 890 | type = make_cv_type (1, 0, type, NULL); |
| 891 | } |
| 892 | catch (const gdb_exception &except) |
| 893 | { |
| 894 | exc = unpack (except); |
| 895 | } |
| 896 | |
| 897 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 898 | return tyscm_scm_from_type (type); |
| 899 | } |
| 900 | |
| 901 | /* (type-volatile <gdb:type>) -> <gdb:type> |
| 902 | Return a volatile-qualified type variant. */ |
| 903 | |
| 904 | static SCM |
| 905 | gdbscm_type_volatile (SCM self) |
| 906 | { |
| 907 | type_smob *t_smob |
| 908 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 909 | struct type *type = t_smob->type; |
| 910 | |
| 911 | gdbscm_gdb_exception exc {}; |
| 912 | try |
| 913 | { |
| 914 | type = make_cv_type (0, 1, type, NULL); |
| 915 | } |
| 916 | catch (const gdb_exception &except) |
| 917 | { |
| 918 | exc = unpack (except); |
| 919 | } |
| 920 | |
| 921 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 922 | return tyscm_scm_from_type (type); |
| 923 | } |
| 924 | |
| 925 | /* (type-unqualified <gdb:type>) -> <gdb:type> |
| 926 | Return an unqualified type variant. */ |
| 927 | |
| 928 | static SCM |
| 929 | gdbscm_type_unqualified (SCM self) |
| 930 | { |
| 931 | type_smob *t_smob |
| 932 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 933 | struct type *type = t_smob->type; |
| 934 | |
| 935 | gdbscm_gdb_exception exc {}; |
| 936 | try |
| 937 | { |
| 938 | type = make_cv_type (0, 0, type, NULL); |
| 939 | } |
| 940 | catch (const gdb_exception &except) |
| 941 | { |
| 942 | exc = unpack (except); |
| 943 | } |
| 944 | |
| 945 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 946 | return tyscm_scm_from_type (type); |
| 947 | } |
| 948 | \f |
| 949 | /* Field related accessors of types. */ |
| 950 | |
| 951 | /* (type-num-fields <gdb:type>) -> integer |
| 952 | Return number of fields. */ |
| 953 | |
| 954 | static SCM |
| 955 | gdbscm_type_num_fields (SCM self) |
| 956 | { |
| 957 | type_smob *t_smob |
| 958 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 959 | struct type *type = t_smob->type; |
| 960 | |
| 961 | type = tyscm_get_composite (type); |
| 962 | if (type == NULL) |
| 963 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 964 | _(not_composite_error)); |
| 965 | |
| 966 | return scm_from_long (type->num_fields ()); |
| 967 | } |
| 968 | |
| 969 | /* (type-field <gdb:type> string) -> <gdb:field> |
| 970 | Return the <gdb:field> object for the field named by the argument. */ |
| 971 | |
| 972 | static SCM |
| 973 | gdbscm_type_field (SCM self, SCM field_scm) |
| 974 | { |
| 975 | type_smob *t_smob |
| 976 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 977 | struct type *type = t_smob->type; |
| 978 | |
| 979 | SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME, |
| 980 | _("string")); |
| 981 | |
| 982 | /* We want just fields of this type, not of base types, so instead of |
| 983 | using lookup_struct_elt_type, portions of that function are |
| 984 | copied here. */ |
| 985 | |
| 986 | type = tyscm_get_composite (type); |
| 987 | if (type == NULL) |
| 988 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 989 | _(not_composite_error)); |
| 990 | |
| 991 | { |
| 992 | gdb::unique_xmalloc_ptr<char> field = gdbscm_scm_to_c_string (field_scm); |
| 993 | |
| 994 | for (int i = 0; i < type->num_fields (); i++) |
| 995 | { |
| 996 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 997 | |
| 998 | if (t_field_name && (strcmp_iw (t_field_name, field.get ()) == 0)) |
| 999 | { |
| 1000 | field.reset (nullptr); |
| 1001 | return tyscm_make_field_smob (self, i); |
| 1002 | } |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, field_scm, |
| 1007 | _("Unknown field")); |
| 1008 | } |
| 1009 | |
| 1010 | /* (type-has-field? <gdb:type> string) -> boolean |
| 1011 | Return boolean indicating if type SELF has FIELD_SCM (a string). */ |
| 1012 | |
| 1013 | static SCM |
| 1014 | gdbscm_type_has_field_p (SCM self, SCM field_scm) |
| 1015 | { |
| 1016 | type_smob *t_smob |
| 1017 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1018 | struct type *type = t_smob->type; |
| 1019 | |
| 1020 | SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME, |
| 1021 | _("string")); |
| 1022 | |
| 1023 | /* We want just fields of this type, not of base types, so instead of |
| 1024 | using lookup_struct_elt_type, portions of that function are |
| 1025 | copied here. */ |
| 1026 | |
| 1027 | type = tyscm_get_composite (type); |
| 1028 | if (type == NULL) |
| 1029 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 1030 | _(not_composite_error)); |
| 1031 | |
| 1032 | { |
| 1033 | gdb::unique_xmalloc_ptr<char> field |
| 1034 | = gdbscm_scm_to_c_string (field_scm); |
| 1035 | |
| 1036 | for (int i = 0; i < type->num_fields (); i++) |
| 1037 | { |
| 1038 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 1039 | |
| 1040 | if (t_field_name && (strcmp_iw (t_field_name, field.get ()) == 0)) |
| 1041 | return SCM_BOOL_T; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | return SCM_BOOL_F; |
| 1046 | } |
| 1047 | |
| 1048 | /* (make-field-iterator <gdb:type>) -> <gdb:iterator> |
| 1049 | Make a field iterator object. */ |
| 1050 | |
| 1051 | static SCM |
| 1052 | gdbscm_make_field_iterator (SCM self) |
| 1053 | { |
| 1054 | type_smob *t_smob |
| 1055 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1056 | struct type *type = t_smob->type; |
| 1057 | struct type *containing_type; |
| 1058 | SCM containing_type_scm; |
| 1059 | |
| 1060 | containing_type = tyscm_get_composite (type); |
| 1061 | if (containing_type == NULL) |
| 1062 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 1063 | _(not_composite_error)); |
| 1064 | |
| 1065 | /* If SELF is a typedef or reference, we want the underlying type, |
| 1066 | which is what tyscm_get_composite returns. */ |
| 1067 | if (containing_type == type) |
| 1068 | containing_type_scm = self; |
| 1069 | else |
| 1070 | containing_type_scm = tyscm_scm_from_type (containing_type); |
| 1071 | |
| 1072 | return gdbscm_make_iterator (containing_type_scm, scm_from_int (0), |
| 1073 | tyscm_next_field_x_proc); |
| 1074 | } |
| 1075 | |
| 1076 | /* (type-next-field! <gdb:iterator>) -> <gdb:field> |
| 1077 | Return the next field in the iteration through the list of fields of the |
| 1078 | type, or (end-of-iteration). |
| 1079 | SELF is a <gdb:iterator> object created by gdbscm_make_field_iterator. |
| 1080 | This is the next! <gdb:iterator> function, not exported to the user. */ |
| 1081 | |
| 1082 | static SCM |
| 1083 | gdbscm_type_next_field_x (SCM self) |
| 1084 | { |
| 1085 | iterator_smob *i_smob; |
| 1086 | type_smob *t_smob; |
| 1087 | struct type *type; |
| 1088 | SCM it_scm, result, progress, object; |
| 1089 | int field; |
| 1090 | |
| 1091 | it_scm = itscm_get_iterator_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1092 | i_smob = (iterator_smob *) SCM_SMOB_DATA (it_scm); |
| 1093 | object = itscm_iterator_smob_object (i_smob); |
| 1094 | progress = itscm_iterator_smob_progress (i_smob); |
| 1095 | |
| 1096 | SCM_ASSERT_TYPE (tyscm_is_type (object), object, |
| 1097 | SCM_ARG1, FUNC_NAME, type_smob_name); |
| 1098 | t_smob = (type_smob *) SCM_SMOB_DATA (object); |
| 1099 | type = t_smob->type; |
| 1100 | |
| 1101 | SCM_ASSERT_TYPE (scm_is_signed_integer (progress, |
| 1102 | 0, type->num_fields ()), |
| 1103 | progress, SCM_ARG1, FUNC_NAME, _("integer")); |
| 1104 | field = scm_to_int (progress); |
| 1105 | |
| 1106 | if (field < type->num_fields ()) |
| 1107 | { |
| 1108 | result = tyscm_make_field_smob (object, field); |
| 1109 | itscm_set_iterator_smob_progress_x (i_smob, scm_from_int (field + 1)); |
| 1110 | return result; |
| 1111 | } |
| 1112 | |
| 1113 | return gdbscm_end_of_iteration (); |
| 1114 | } |
| 1115 | \f |
| 1116 | /* Field smob accessors. */ |
| 1117 | |
| 1118 | /* (field-name <gdb:field>) -> string |
| 1119 | Return the name of this field or #f if there isn't one. */ |
| 1120 | |
| 1121 | static SCM |
| 1122 | gdbscm_field_name (SCM self) |
| 1123 | { |
| 1124 | field_smob *f_smob |
| 1125 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1126 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1127 | |
| 1128 | if (FIELD_NAME (*field)) |
| 1129 | return gdbscm_scm_from_c_string (FIELD_NAME (*field)); |
| 1130 | return SCM_BOOL_F; |
| 1131 | } |
| 1132 | |
| 1133 | /* (field-type <gdb:field>) -> <gdb:type> |
| 1134 | Return the <gdb:type> object of the field or #f if there isn't one. */ |
| 1135 | |
| 1136 | static SCM |
| 1137 | gdbscm_field_type (SCM self) |
| 1138 | { |
| 1139 | field_smob *f_smob |
| 1140 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1141 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1142 | |
| 1143 | /* A field can have a NULL type in some situations. */ |
| 1144 | if (field->type ()) |
| 1145 | return tyscm_scm_from_type (field->type ()); |
| 1146 | return SCM_BOOL_F; |
| 1147 | } |
| 1148 | |
| 1149 | /* (field-enumval <gdb:field>) -> integer |
| 1150 | For enum values, return its value as an integer. */ |
| 1151 | |
| 1152 | static SCM |
| 1153 | gdbscm_field_enumval (SCM self) |
| 1154 | { |
| 1155 | field_smob *f_smob |
| 1156 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1157 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1158 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1159 | |
| 1160 | SCM_ASSERT_TYPE (type->code () == TYPE_CODE_ENUM, |
| 1161 | self, SCM_ARG1, FUNC_NAME, _("enum type")); |
| 1162 | |
| 1163 | return scm_from_long (FIELD_ENUMVAL (*field)); |
| 1164 | } |
| 1165 | |
| 1166 | /* (field-bitpos <gdb:field>) -> integer |
| 1167 | For bitfields, return its offset in bits. */ |
| 1168 | |
| 1169 | static SCM |
| 1170 | gdbscm_field_bitpos (SCM self) |
| 1171 | { |
| 1172 | field_smob *f_smob |
| 1173 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1174 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1175 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1176 | |
| 1177 | SCM_ASSERT_TYPE (type->code () != TYPE_CODE_ENUM, |
| 1178 | self, SCM_ARG1, FUNC_NAME, _("non-enum type")); |
| 1179 | |
| 1180 | return scm_from_long (FIELD_BITPOS (*field)); |
| 1181 | } |
| 1182 | |
| 1183 | /* (field-bitsize <gdb:field>) -> integer |
| 1184 | Return the size of the field in bits. */ |
| 1185 | |
| 1186 | static SCM |
| 1187 | gdbscm_field_bitsize (SCM self) |
| 1188 | { |
| 1189 | field_smob *f_smob |
| 1190 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1191 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1192 | |
| 1193 | return scm_from_long (FIELD_BITPOS (*field)); |
| 1194 | } |
| 1195 | |
| 1196 | /* (field-artificial? <gdb:field>) -> boolean |
| 1197 | Return #t if field is artificial. */ |
| 1198 | |
| 1199 | static SCM |
| 1200 | gdbscm_field_artificial_p (SCM self) |
| 1201 | { |
| 1202 | field_smob *f_smob |
| 1203 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1204 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1205 | |
| 1206 | return scm_from_bool (FIELD_ARTIFICIAL (*field)); |
| 1207 | } |
| 1208 | |
| 1209 | /* (field-baseclass? <gdb:field>) -> boolean |
| 1210 | Return #t if field is a baseclass. */ |
| 1211 | |
| 1212 | static SCM |
| 1213 | gdbscm_field_baseclass_p (SCM self) |
| 1214 | { |
| 1215 | field_smob *f_smob |
| 1216 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1217 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1218 | |
| 1219 | if (type->code () == TYPE_CODE_STRUCT) |
| 1220 | return scm_from_bool (f_smob->field_num < TYPE_N_BASECLASSES (type)); |
| 1221 | return SCM_BOOL_F; |
| 1222 | } |
| 1223 | \f |
| 1224 | /* Return the type named TYPE_NAME in BLOCK. |
| 1225 | Returns NULL if not found. |
| 1226 | This routine does not throw an error. */ |
| 1227 | |
| 1228 | static struct type * |
| 1229 | tyscm_lookup_typename (const char *type_name, const struct block *block) |
| 1230 | { |
| 1231 | struct type *type = NULL; |
| 1232 | |
| 1233 | try |
| 1234 | { |
| 1235 | if (startswith (type_name, "struct ")) |
| 1236 | type = lookup_struct (type_name + 7, NULL); |
| 1237 | else if (startswith (type_name, "union ")) |
| 1238 | type = lookup_union (type_name + 6, NULL); |
| 1239 | else if (startswith (type_name, "enum ")) |
| 1240 | type = lookup_enum (type_name + 5, NULL); |
| 1241 | else |
| 1242 | type = lookup_typename (current_language, |
| 1243 | type_name, block, 0); |
| 1244 | } |
| 1245 | catch (const gdb_exception &except) |
| 1246 | { |
| 1247 | return NULL; |
| 1248 | } |
| 1249 | |
| 1250 | return type; |
| 1251 | } |
| 1252 | |
| 1253 | /* (lookup-type name [#:block <gdb:block>]) -> <gdb:type> |
| 1254 | TODO: legacy template support left out until needed. */ |
| 1255 | |
| 1256 | static SCM |
| 1257 | gdbscm_lookup_type (SCM name_scm, SCM rest) |
| 1258 | { |
| 1259 | SCM keywords[] = { block_keyword, SCM_BOOL_F }; |
| 1260 | char *name; |
| 1261 | SCM block_scm = SCM_BOOL_F; |
| 1262 | int block_arg_pos = -1; |
| 1263 | const struct block *block = NULL; |
| 1264 | struct type *type; |
| 1265 | |
| 1266 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#O", |
| 1267 | name_scm, &name, |
| 1268 | rest, &block_arg_pos, &block_scm); |
| 1269 | |
| 1270 | if (block_arg_pos != -1) |
| 1271 | { |
| 1272 | SCM exception; |
| 1273 | |
| 1274 | block = bkscm_scm_to_block (block_scm, block_arg_pos, FUNC_NAME, |
| 1275 | &exception); |
| 1276 | if (block == NULL) |
| 1277 | { |
| 1278 | xfree (name); |
| 1279 | gdbscm_throw (exception); |
| 1280 | } |
| 1281 | } |
| 1282 | type = tyscm_lookup_typename (name, block); |
| 1283 | xfree (name); |
| 1284 | |
| 1285 | if (type != NULL) |
| 1286 | return tyscm_scm_from_type (type); |
| 1287 | return SCM_BOOL_F; |
| 1288 | } |
| 1289 | \f |
| 1290 | /* Initialize the Scheme type code. */ |
| 1291 | |
| 1292 | |
| 1293 | static const scheme_integer_constant type_integer_constants[] = |
| 1294 | { |
| 1295 | #define X(SYM) { #SYM, SYM } |
| 1296 | X (TYPE_CODE_BITSTRING), |
| 1297 | X (TYPE_CODE_PTR), |
| 1298 | X (TYPE_CODE_ARRAY), |
| 1299 | X (TYPE_CODE_STRUCT), |
| 1300 | X (TYPE_CODE_UNION), |
| 1301 | X (TYPE_CODE_ENUM), |
| 1302 | X (TYPE_CODE_FLAGS), |
| 1303 | X (TYPE_CODE_FUNC), |
| 1304 | X (TYPE_CODE_INT), |
| 1305 | X (TYPE_CODE_FLT), |
| 1306 | X (TYPE_CODE_VOID), |
| 1307 | X (TYPE_CODE_SET), |
| 1308 | X (TYPE_CODE_RANGE), |
| 1309 | X (TYPE_CODE_STRING), |
| 1310 | X (TYPE_CODE_ERROR), |
| 1311 | X (TYPE_CODE_METHOD), |
| 1312 | X (TYPE_CODE_METHODPTR), |
| 1313 | X (TYPE_CODE_MEMBERPTR), |
| 1314 | X (TYPE_CODE_REF), |
| 1315 | X (TYPE_CODE_CHAR), |
| 1316 | X (TYPE_CODE_BOOL), |
| 1317 | X (TYPE_CODE_COMPLEX), |
| 1318 | X (TYPE_CODE_TYPEDEF), |
| 1319 | X (TYPE_CODE_NAMESPACE), |
| 1320 | X (TYPE_CODE_DECFLOAT), |
| 1321 | X (TYPE_CODE_INTERNAL_FUNCTION), |
| 1322 | #undef X |
| 1323 | |
| 1324 | END_INTEGER_CONSTANTS |
| 1325 | }; |
| 1326 | |
| 1327 | static const scheme_function type_functions[] = |
| 1328 | { |
| 1329 | { "type?", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_p), |
| 1330 | "\ |
| 1331 | Return #t if the object is a <gdb:type> object." }, |
| 1332 | |
| 1333 | { "lookup-type", 1, 0, 1, as_a_scm_t_subr (gdbscm_lookup_type), |
| 1334 | "\ |
| 1335 | Return the <gdb:type> object representing string or #f if not found.\n\ |
| 1336 | If block is given then the type is looked for in that block.\n\ |
| 1337 | \n\ |
| 1338 | Arguments: string [#:block <gdb:block>]" }, |
| 1339 | |
| 1340 | { "type-code", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_code), |
| 1341 | "\ |
| 1342 | Return the code of the type" }, |
| 1343 | |
| 1344 | { "type-tag", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_tag), |
| 1345 | "\ |
| 1346 | Return the tag name of the type, or #f if there isn't one." }, |
| 1347 | |
| 1348 | { "type-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_name), |
| 1349 | "\ |
| 1350 | Return the name of the type as a string, or #f if there isn't one." }, |
| 1351 | |
| 1352 | { "type-print-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_print_name), |
| 1353 | "\ |
| 1354 | Return the print name of the type as a string." }, |
| 1355 | |
| 1356 | { "type-sizeof", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_sizeof), |
| 1357 | "\ |
| 1358 | Return the size of the type, in bytes." }, |
| 1359 | |
| 1360 | { "type-strip-typedefs", 1, 0, 0, |
| 1361 | as_a_scm_t_subr (gdbscm_type_strip_typedefs), |
| 1362 | "\ |
| 1363 | Return a type formed by stripping the type of all typedefs." }, |
| 1364 | |
| 1365 | { "type-array", 2, 1, 0, as_a_scm_t_subr (gdbscm_type_array), |
| 1366 | "\ |
| 1367 | Return a type representing an array of objects of the type.\n\ |
| 1368 | \n\ |
| 1369 | Arguments: <gdb:type> [low-bound] high-bound\n\ |
| 1370 | If low-bound is not provided zero is used.\n\ |
| 1371 | N.B. If only the high-bound parameter is specified, it is not\n\ |
| 1372 | the array size.\n\ |
| 1373 | Valid bounds for array indices are [low-bound,high-bound]." }, |
| 1374 | |
| 1375 | { "type-vector", 2, 1, 0, as_a_scm_t_subr (gdbscm_type_vector), |
| 1376 | "\ |
| 1377 | Return a type representing a vector of objects of the type.\n\ |
| 1378 | Vectors differ from arrays in that if the current language has C-style\n\ |
| 1379 | arrays, vectors don't decay to a pointer to the first element.\n\ |
| 1380 | They are first class values.\n\ |
| 1381 | \n\ |
| 1382 | Arguments: <gdb:type> [low-bound] high-bound\n\ |
| 1383 | If low-bound is not provided zero is used.\n\ |
| 1384 | N.B. If only the high-bound parameter is specified, it is not\n\ |
| 1385 | the array size.\n\ |
| 1386 | Valid bounds for array indices are [low-bound,high-bound]." }, |
| 1387 | |
| 1388 | { "type-pointer", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_pointer), |
| 1389 | "\ |
| 1390 | Return a type of pointer to the type." }, |
| 1391 | |
| 1392 | { "type-range", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_range), |
| 1393 | "\ |
| 1394 | Return (low high) representing the range for the type." }, |
| 1395 | |
| 1396 | { "type-reference", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_reference), |
| 1397 | "\ |
| 1398 | Return a type of reference to the type." }, |
| 1399 | |
| 1400 | { "type-target", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_target), |
| 1401 | "\ |
| 1402 | Return the target type of the type." }, |
| 1403 | |
| 1404 | { "type-const", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_const), |
| 1405 | "\ |
| 1406 | Return a const variant of the type." }, |
| 1407 | |
| 1408 | { "type-volatile", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_volatile), |
| 1409 | "\ |
| 1410 | Return a volatile variant of the type." }, |
| 1411 | |
| 1412 | { "type-unqualified", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_unqualified), |
| 1413 | "\ |
| 1414 | Return a variant of the type without const or volatile attributes." }, |
| 1415 | |
| 1416 | { "type-num-fields", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_num_fields), |
| 1417 | "\ |
| 1418 | Return the number of fields of the type." }, |
| 1419 | |
| 1420 | { "type-fields", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_fields), |
| 1421 | "\ |
| 1422 | Return the list of <gdb:field> objects of fields of the type." }, |
| 1423 | |
| 1424 | { "make-field-iterator", 1, 0, 0, |
| 1425 | as_a_scm_t_subr (gdbscm_make_field_iterator), |
| 1426 | "\ |
| 1427 | Return a <gdb:iterator> object for iterating over the fields of the type." }, |
| 1428 | |
| 1429 | { "type-field", 2, 0, 0, as_a_scm_t_subr (gdbscm_type_field), |
| 1430 | "\ |
| 1431 | Return the field named by string of the type.\n\ |
| 1432 | \n\ |
| 1433 | Arguments: <gdb:type> string" }, |
| 1434 | |
| 1435 | { "type-has-field?", 2, 0, 0, as_a_scm_t_subr (gdbscm_type_has_field_p), |
| 1436 | "\ |
| 1437 | Return #t if the type has field named string.\n\ |
| 1438 | \n\ |
| 1439 | Arguments: <gdb:type> string" }, |
| 1440 | |
| 1441 | { "field?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_p), |
| 1442 | "\ |
| 1443 | Return #t if the object is a <gdb:field> object." }, |
| 1444 | |
| 1445 | { "field-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_name), |
| 1446 | "\ |
| 1447 | Return the name of the field." }, |
| 1448 | |
| 1449 | { "field-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_type), |
| 1450 | "\ |
| 1451 | Return the type of the field." }, |
| 1452 | |
| 1453 | { "field-enumval", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_enumval), |
| 1454 | "\ |
| 1455 | Return the enum value represented by the field." }, |
| 1456 | |
| 1457 | { "field-bitpos", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_bitpos), |
| 1458 | "\ |
| 1459 | Return the offset in bits of the field in its containing type." }, |
| 1460 | |
| 1461 | { "field-bitsize", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_bitsize), |
| 1462 | "\ |
| 1463 | Return the size of the field in bits." }, |
| 1464 | |
| 1465 | { "field-artificial?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_artificial_p), |
| 1466 | "\ |
| 1467 | Return #t if the field is artificial." }, |
| 1468 | |
| 1469 | { "field-baseclass?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_baseclass_p), |
| 1470 | "\ |
| 1471 | Return #t if the field is a baseclass." }, |
| 1472 | |
| 1473 | END_FUNCTIONS |
| 1474 | }; |
| 1475 | |
| 1476 | void |
| 1477 | gdbscm_initialize_types (void) |
| 1478 | { |
| 1479 | type_smob_tag = gdbscm_make_smob_type (type_smob_name, sizeof (type_smob)); |
| 1480 | scm_set_smob_free (type_smob_tag, tyscm_free_type_smob); |
| 1481 | scm_set_smob_print (type_smob_tag, tyscm_print_type_smob); |
| 1482 | scm_set_smob_equalp (type_smob_tag, tyscm_equal_p_type_smob); |
| 1483 | |
| 1484 | field_smob_tag = gdbscm_make_smob_type (field_smob_name, |
| 1485 | sizeof (field_smob)); |
| 1486 | scm_set_smob_print (field_smob_tag, tyscm_print_field_smob); |
| 1487 | |
| 1488 | gdbscm_define_integer_constants (type_integer_constants, 1); |
| 1489 | gdbscm_define_functions (type_functions, 1); |
| 1490 | |
| 1491 | /* This function is "private". */ |
| 1492 | tyscm_next_field_x_proc |
| 1493 | = scm_c_define_gsubr ("%type-next-field!", 1, 0, 0, |
| 1494 | as_a_scm_t_subr (gdbscm_type_next_field_x)); |
| 1495 | scm_set_procedure_property_x (tyscm_next_field_x_proc, |
| 1496 | gdbscm_documentation_symbol, |
| 1497 | gdbscm_scm_from_c_string ("\ |
| 1498 | Internal function to assist the type fields iterator.")); |
| 1499 | |
| 1500 | block_keyword = scm_from_latin1_keyword ("block"); |
| 1501 | |
| 1502 | /* Register an objfile "free" callback so we can properly copy types |
| 1503 | associated with the objfile when it's about to be deleted. */ |
| 1504 | tyscm_objfile_data_key |
| 1505 | = register_objfile_data_with_cleanup (save_objfile_types, NULL); |
| 1506 | |
| 1507 | global_types_map = gdbscm_create_eqable_gsmob_ptr_map (tyscm_hash_type_smob, |
| 1508 | tyscm_eq_type_smob); |
| 1509 | } |