| 1 | /* Scheme interface to types. |
| 2 | |
| 3 | Copyright (C) 2008-2019 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 "gdbsupport/vec.h" |
| 30 | #include "bcache.h" |
| 31 | #include "dwarf2loc.h" |
| 32 | #include "typeprint.h" |
| 33 | #include "guile-internal.h" |
| 34 | |
| 35 | /* The <gdb:type> smob. |
| 36 | The type is chained with all types associated with its objfile, if any. |
| 37 | This lets us copy the underlying struct type when the objfile is |
| 38 | deleted. |
| 39 | The typedef for this struct is in guile-internal.h. */ |
| 40 | |
| 41 | struct _type_smob |
| 42 | { |
| 43 | /* This always appears first. |
| 44 | eqable_gdb_smob is used so that types are eq?-able. |
| 45 | Also, a type object can be associated with an objfile. eqable_gdb_smob |
| 46 | lets us track the lifetime of all types associated with an objfile. |
| 47 | When an objfile is deleted we need to invalidate the type object. */ |
| 48 | eqable_gdb_smob base; |
| 49 | |
| 50 | /* The GDB type structure this smob is wrapping. */ |
| 51 | struct type *type; |
| 52 | }; |
| 53 | |
| 54 | /* A field smob. */ |
| 55 | |
| 56 | typedef struct |
| 57 | { |
| 58 | /* This always appears first. */ |
| 59 | gdb_smob base; |
| 60 | |
| 61 | /* Backlink to the containing <gdb:type> object. */ |
| 62 | SCM type_scm; |
| 63 | |
| 64 | /* The field number in TYPE_SCM. */ |
| 65 | int field_num; |
| 66 | } field_smob; |
| 67 | |
| 68 | static const char type_smob_name[] = "gdb:type"; |
| 69 | static const char field_smob_name[] = "gdb:field"; |
| 70 | |
| 71 | static const char not_composite_error[] = |
| 72 | N_("type is not a structure, union, or enum type"); |
| 73 | |
| 74 | /* The tag Guile knows the type smob by. */ |
| 75 | static scm_t_bits type_smob_tag; |
| 76 | |
| 77 | /* The tag Guile knows the field smob by. */ |
| 78 | static scm_t_bits field_smob_tag; |
| 79 | |
| 80 | /* The "next" procedure for field iterators. */ |
| 81 | static SCM tyscm_next_field_x_proc; |
| 82 | |
| 83 | /* Keywords used in argument passing. */ |
| 84 | static SCM block_keyword; |
| 85 | |
| 86 | static const struct objfile_data *tyscm_objfile_data_key; |
| 87 | |
| 88 | /* Hash table to uniquify global (non-objfile-owned) types. */ |
| 89 | static htab_t global_types_map; |
| 90 | |
| 91 | static struct type *tyscm_get_composite (struct type *type); |
| 92 | |
| 93 | /* Return the type field of T_SMOB. |
| 94 | This exists so that we don't have to export the struct's contents. */ |
| 95 | |
| 96 | struct type * |
| 97 | tyscm_type_smob_type (type_smob *t_smob) |
| 98 | { |
| 99 | return t_smob->type; |
| 100 | } |
| 101 | |
| 102 | /* Return the name of TYPE in expanded form. If there's an error |
| 103 | computing the name, throws the gdb exception with scm_throw. */ |
| 104 | |
| 105 | static std::string |
| 106 | tyscm_type_name (struct type *type) |
| 107 | { |
| 108 | SCM excp; |
| 109 | try |
| 110 | { |
| 111 | string_file stb; |
| 112 | |
| 113 | LA_PRINT_TYPE (type, "", &stb, -1, 0, &type_print_raw_options); |
| 114 | return std::move (stb.string ()); |
| 115 | } |
| 116 | catch (const gdb_exception &except) |
| 117 | { |
| 118 | excp = gdbscm_scm_from_gdb_exception (unpack (except)); |
| 119 | } |
| 120 | |
| 121 | gdbscm_throw (excp); |
| 122 | } |
| 123 | \f |
| 124 | /* Administrivia for type smobs. */ |
| 125 | |
| 126 | /* Helper function to hash a type_smob. */ |
| 127 | |
| 128 | static hashval_t |
| 129 | tyscm_hash_type_smob (const void *p) |
| 130 | { |
| 131 | const type_smob *t_smob = (const type_smob *) p; |
| 132 | |
| 133 | return htab_hash_pointer (t_smob->type); |
| 134 | } |
| 135 | |
| 136 | /* Helper function to compute equality of type_smobs. */ |
| 137 | |
| 138 | static int |
| 139 | tyscm_eq_type_smob (const void *ap, const void *bp) |
| 140 | { |
| 141 | const type_smob *a = (const type_smob *) ap; |
| 142 | const type_smob *b = (const type_smob *) bp; |
| 143 | |
| 144 | return (a->type == b->type |
| 145 | && a->type != NULL); |
| 146 | } |
| 147 | |
| 148 | /* Return the struct type pointer -> SCM mapping table. |
| 149 | If type is owned by an objfile, the mapping table is created if necessary. |
| 150 | Otherwise, type is not owned by an objfile, and we use |
| 151 | global_types_map. */ |
| 152 | |
| 153 | static htab_t |
| 154 | tyscm_type_map (struct type *type) |
| 155 | { |
| 156 | struct objfile *objfile = TYPE_OBJFILE (type); |
| 157 | htab_t htab; |
| 158 | |
| 159 | if (objfile == NULL) |
| 160 | return global_types_map; |
| 161 | |
| 162 | htab = (htab_t) objfile_data (objfile, tyscm_objfile_data_key); |
| 163 | if (htab == NULL) |
| 164 | { |
| 165 | htab = gdbscm_create_eqable_gsmob_ptr_map (tyscm_hash_type_smob, |
| 166 | tyscm_eq_type_smob); |
| 167 | set_objfile_data (objfile, tyscm_objfile_data_key, htab); |
| 168 | } |
| 169 | |
| 170 | return htab; |
| 171 | } |
| 172 | |
| 173 | /* The smob "free" function for <gdb:type>. */ |
| 174 | |
| 175 | static size_t |
| 176 | tyscm_free_type_smob (SCM self) |
| 177 | { |
| 178 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (self); |
| 179 | |
| 180 | if (t_smob->type != NULL) |
| 181 | { |
| 182 | htab_t htab = tyscm_type_map (t_smob->type); |
| 183 | |
| 184 | gdbscm_clear_eqable_gsmob_ptr_slot (htab, &t_smob->base); |
| 185 | } |
| 186 | |
| 187 | /* Not necessary, done to catch bugs. */ |
| 188 | t_smob->type = NULL; |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | /* The smob "print" function for <gdb:type>. */ |
| 194 | |
| 195 | static int |
| 196 | tyscm_print_type_smob (SCM self, SCM port, scm_print_state *pstate) |
| 197 | { |
| 198 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (self); |
| 199 | std::string name = tyscm_type_name (t_smob->type); |
| 200 | |
| 201 | /* pstate->writingp = zero if invoked by display/~A, and nonzero if |
| 202 | invoked by write/~S. What to do here may need to evolve. |
| 203 | IWBN if we could pass an argument to format that would we could use |
| 204 | instead of writingp. */ |
| 205 | if (pstate->writingp) |
| 206 | gdbscm_printf (port, "#<%s ", type_smob_name); |
| 207 | |
| 208 | scm_puts (name.c_str (), port); |
| 209 | |
| 210 | if (pstate->writingp) |
| 211 | scm_puts (">", port); |
| 212 | |
| 213 | scm_remember_upto_here_1 (self); |
| 214 | |
| 215 | /* Non-zero means success. */ |
| 216 | return 1; |
| 217 | } |
| 218 | |
| 219 | /* The smob "equal?" function for <gdb:type>. */ |
| 220 | |
| 221 | static SCM |
| 222 | tyscm_equal_p_type_smob (SCM type1_scm, SCM type2_scm) |
| 223 | { |
| 224 | type_smob *type1_smob, *type2_smob; |
| 225 | struct type *type1, *type2; |
| 226 | bool result = false; |
| 227 | |
| 228 | SCM_ASSERT_TYPE (tyscm_is_type (type1_scm), type1_scm, SCM_ARG1, FUNC_NAME, |
| 229 | type_smob_name); |
| 230 | SCM_ASSERT_TYPE (tyscm_is_type (type2_scm), type2_scm, SCM_ARG2, FUNC_NAME, |
| 231 | type_smob_name); |
| 232 | type1_smob = (type_smob *) SCM_SMOB_DATA (type1_scm); |
| 233 | type2_smob = (type_smob *) SCM_SMOB_DATA (type2_scm); |
| 234 | type1 = type1_smob->type; |
| 235 | type2 = type2_smob->type; |
| 236 | |
| 237 | gdbscm_gdb_exception exc {}; |
| 238 | try |
| 239 | { |
| 240 | result = types_deeply_equal (type1, type2); |
| 241 | } |
| 242 | catch (const gdb_exception &except) |
| 243 | { |
| 244 | exc = unpack (except); |
| 245 | } |
| 246 | |
| 247 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 248 | return scm_from_bool (result); |
| 249 | } |
| 250 | |
| 251 | /* Low level routine to create a <gdb:type> object. */ |
| 252 | |
| 253 | static SCM |
| 254 | tyscm_make_type_smob (void) |
| 255 | { |
| 256 | type_smob *t_smob = (type_smob *) |
| 257 | scm_gc_malloc (sizeof (type_smob), type_smob_name); |
| 258 | SCM t_scm; |
| 259 | |
| 260 | /* This must be filled in by the caller. */ |
| 261 | t_smob->type = NULL; |
| 262 | |
| 263 | t_scm = scm_new_smob (type_smob_tag, (scm_t_bits) t_smob); |
| 264 | gdbscm_init_eqable_gsmob (&t_smob->base, t_scm); |
| 265 | |
| 266 | return t_scm; |
| 267 | } |
| 268 | |
| 269 | /* Return non-zero if SCM is a <gdb:type> object. */ |
| 270 | |
| 271 | int |
| 272 | tyscm_is_type (SCM self) |
| 273 | { |
| 274 | return SCM_SMOB_PREDICATE (type_smob_tag, self); |
| 275 | } |
| 276 | |
| 277 | /* (type? object) -> boolean */ |
| 278 | |
| 279 | static SCM |
| 280 | gdbscm_type_p (SCM self) |
| 281 | { |
| 282 | return scm_from_bool (tyscm_is_type (self)); |
| 283 | } |
| 284 | |
| 285 | /* Return the existing object that encapsulates TYPE, or create a new |
| 286 | <gdb:type> object. */ |
| 287 | |
| 288 | SCM |
| 289 | tyscm_scm_from_type (struct type *type) |
| 290 | { |
| 291 | htab_t htab; |
| 292 | eqable_gdb_smob **slot; |
| 293 | type_smob *t_smob, t_smob_for_lookup; |
| 294 | SCM t_scm; |
| 295 | |
| 296 | /* If we've already created a gsmob for this type, return it. |
| 297 | This makes types eq?-able. */ |
| 298 | htab = tyscm_type_map (type); |
| 299 | t_smob_for_lookup.type = type; |
| 300 | slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &t_smob_for_lookup.base); |
| 301 | if (*slot != NULL) |
| 302 | return (*slot)->containing_scm; |
| 303 | |
| 304 | t_scm = tyscm_make_type_smob (); |
| 305 | t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 306 | t_smob->type = type; |
| 307 | gdbscm_fill_eqable_gsmob_ptr_slot (slot, &t_smob->base); |
| 308 | |
| 309 | return t_scm; |
| 310 | } |
| 311 | |
| 312 | /* Returns the <gdb:type> object in SELF. |
| 313 | Throws an exception if SELF is not a <gdb:type> object. */ |
| 314 | |
| 315 | static SCM |
| 316 | tyscm_get_type_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 317 | { |
| 318 | SCM_ASSERT_TYPE (tyscm_is_type (self), self, arg_pos, func_name, |
| 319 | type_smob_name); |
| 320 | |
| 321 | return self; |
| 322 | } |
| 323 | |
| 324 | /* Returns a pointer to the type smob of SELF. |
| 325 | Throws an exception if SELF is not a <gdb:type> object. */ |
| 326 | |
| 327 | type_smob * |
| 328 | tyscm_get_type_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 329 | { |
| 330 | SCM t_scm = tyscm_get_type_arg_unsafe (self, arg_pos, func_name); |
| 331 | type_smob *t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 332 | |
| 333 | return t_smob; |
| 334 | } |
| 335 | |
| 336 | /* Return the type field of T_SCM, an object of type <gdb:type>. |
| 337 | This exists so that we don't have to export the struct's contents. */ |
| 338 | |
| 339 | struct type * |
| 340 | tyscm_scm_to_type (SCM t_scm) |
| 341 | { |
| 342 | type_smob *t_smob; |
| 343 | |
| 344 | gdb_assert (tyscm_is_type (t_scm)); |
| 345 | t_smob = (type_smob *) SCM_SMOB_DATA (t_scm); |
| 346 | return t_smob->type; |
| 347 | } |
| 348 | |
| 349 | /* Helper function for save_objfile_types to make a deep copy of the type. */ |
| 350 | |
| 351 | static int |
| 352 | tyscm_copy_type_recursive (void **slot, void *info) |
| 353 | { |
| 354 | type_smob *t_smob = (type_smob *) *slot; |
| 355 | htab_t copied_types = (htab_t) info; |
| 356 | struct objfile *objfile = TYPE_OBJFILE (t_smob->type); |
| 357 | htab_t htab; |
| 358 | eqable_gdb_smob **new_slot; |
| 359 | type_smob t_smob_for_lookup; |
| 360 | |
| 361 | gdb_assert (objfile != NULL); |
| 362 | |
| 363 | htab_empty (copied_types); |
| 364 | t_smob->type = copy_type_recursive (objfile, t_smob->type, copied_types); |
| 365 | |
| 366 | /* The eq?-hashtab that the type lived in is going away. |
| 367 | Add the type to its new eq?-hashtab: Otherwise if/when the type is later |
| 368 | garbage collected we'll assert-fail if the type isn't in the hashtab. |
| 369 | PR 16612. |
| 370 | |
| 371 | Types now live in "arch space", and things like "char" that came from |
| 372 | the objfile *could* be considered eq? with the arch "char" type. |
| 373 | However, they weren't before the objfile got deleted, so making them |
| 374 | eq? now is debatable. */ |
| 375 | htab = tyscm_type_map (t_smob->type); |
| 376 | t_smob_for_lookup.type = t_smob->type; |
| 377 | new_slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &t_smob_for_lookup.base); |
| 378 | gdb_assert (*new_slot == NULL); |
| 379 | gdbscm_fill_eqable_gsmob_ptr_slot (new_slot, &t_smob->base); |
| 380 | |
| 381 | return 1; |
| 382 | } |
| 383 | |
| 384 | /* Called when OBJFILE is about to be deleted. |
| 385 | Make a copy of all types associated with OBJFILE. */ |
| 386 | |
| 387 | static void |
| 388 | save_objfile_types (struct objfile *objfile, void *datum) |
| 389 | { |
| 390 | htab_t htab = (htab_t) datum; |
| 391 | htab_t copied_types; |
| 392 | |
| 393 | if (!gdb_scheme_initialized) |
| 394 | return; |
| 395 | |
| 396 | copied_types = create_copied_types_hash (objfile); |
| 397 | |
| 398 | if (htab != NULL) |
| 399 | { |
| 400 | htab_traverse_noresize (htab, tyscm_copy_type_recursive, copied_types); |
| 401 | htab_delete (htab); |
| 402 | } |
| 403 | |
| 404 | htab_delete (copied_types); |
| 405 | } |
| 406 | \f |
| 407 | /* Administrivia for field smobs. */ |
| 408 | |
| 409 | /* The smob "print" function for <gdb:field>. */ |
| 410 | |
| 411 | static int |
| 412 | tyscm_print_field_smob (SCM self, SCM port, scm_print_state *pstate) |
| 413 | { |
| 414 | field_smob *f_smob = (field_smob *) SCM_SMOB_DATA (self); |
| 415 | |
| 416 | gdbscm_printf (port, "#<%s ", field_smob_name); |
| 417 | scm_write (f_smob->type_scm, port); |
| 418 | gdbscm_printf (port, " %d", f_smob->field_num); |
| 419 | scm_puts (">", port); |
| 420 | |
| 421 | scm_remember_upto_here_1 (self); |
| 422 | |
| 423 | /* Non-zero means success. */ |
| 424 | return 1; |
| 425 | } |
| 426 | |
| 427 | /* Low level routine to create a <gdb:field> object for field FIELD_NUM |
| 428 | of type TYPE_SCM. */ |
| 429 | |
| 430 | static SCM |
| 431 | tyscm_make_field_smob (SCM type_scm, int field_num) |
| 432 | { |
| 433 | field_smob *f_smob = (field_smob *) |
| 434 | scm_gc_malloc (sizeof (field_smob), field_smob_name); |
| 435 | SCM result; |
| 436 | |
| 437 | f_smob->type_scm = type_scm; |
| 438 | f_smob->field_num = field_num; |
| 439 | result = scm_new_smob (field_smob_tag, (scm_t_bits) f_smob); |
| 440 | gdbscm_init_gsmob (&f_smob->base); |
| 441 | |
| 442 | return result; |
| 443 | } |
| 444 | |
| 445 | /* Return non-zero if SCM is a <gdb:field> object. */ |
| 446 | |
| 447 | static int |
| 448 | tyscm_is_field (SCM self) |
| 449 | { |
| 450 | return SCM_SMOB_PREDICATE (field_smob_tag, self); |
| 451 | } |
| 452 | |
| 453 | /* (field? object) -> boolean */ |
| 454 | |
| 455 | static SCM |
| 456 | gdbscm_field_p (SCM self) |
| 457 | { |
| 458 | return scm_from_bool (tyscm_is_field (self)); |
| 459 | } |
| 460 | |
| 461 | /* Create a new <gdb:field> object that encapsulates field FIELD_NUM |
| 462 | in type TYPE_SCM. */ |
| 463 | |
| 464 | SCM |
| 465 | tyscm_scm_from_field (SCM type_scm, int field_num) |
| 466 | { |
| 467 | return tyscm_make_field_smob (type_scm, field_num); |
| 468 | } |
| 469 | |
| 470 | /* Returns the <gdb:field> object in SELF. |
| 471 | Throws an exception if SELF is not a <gdb:field> object. */ |
| 472 | |
| 473 | static SCM |
| 474 | tyscm_get_field_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 475 | { |
| 476 | SCM_ASSERT_TYPE (tyscm_is_field (self), self, arg_pos, func_name, |
| 477 | field_smob_name); |
| 478 | |
| 479 | return self; |
| 480 | } |
| 481 | |
| 482 | /* Returns a pointer to the field smob of SELF. |
| 483 | Throws an exception if SELF is not a <gdb:field> object. */ |
| 484 | |
| 485 | static field_smob * |
| 486 | tyscm_get_field_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 487 | { |
| 488 | SCM f_scm = tyscm_get_field_arg_unsafe (self, arg_pos, func_name); |
| 489 | field_smob *f_smob = (field_smob *) SCM_SMOB_DATA (f_scm); |
| 490 | |
| 491 | return f_smob; |
| 492 | } |
| 493 | |
| 494 | /* Returns a pointer to the type struct in F_SMOB |
| 495 | (the type the field is in). */ |
| 496 | |
| 497 | static struct type * |
| 498 | tyscm_field_smob_containing_type (field_smob *f_smob) |
| 499 | { |
| 500 | type_smob *t_smob; |
| 501 | |
| 502 | gdb_assert (tyscm_is_type (f_smob->type_scm)); |
| 503 | t_smob = (type_smob *) SCM_SMOB_DATA (f_smob->type_scm); |
| 504 | |
| 505 | return t_smob->type; |
| 506 | } |
| 507 | |
| 508 | /* Returns a pointer to the field struct of F_SMOB. */ |
| 509 | |
| 510 | static struct field * |
| 511 | tyscm_field_smob_to_field (field_smob *f_smob) |
| 512 | { |
| 513 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 514 | |
| 515 | /* This should be non-NULL by construction. */ |
| 516 | gdb_assert (TYPE_FIELDS (type) != NULL); |
| 517 | |
| 518 | return &TYPE_FIELD (type, f_smob->field_num); |
| 519 | } |
| 520 | \f |
| 521 | /* Type smob accessors. */ |
| 522 | |
| 523 | /* (type-code <gdb:type>) -> integer |
| 524 | Return the code for this type. */ |
| 525 | |
| 526 | static SCM |
| 527 | gdbscm_type_code (SCM self) |
| 528 | { |
| 529 | type_smob *t_smob |
| 530 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 531 | struct type *type = t_smob->type; |
| 532 | |
| 533 | return scm_from_int (TYPE_CODE (type)); |
| 534 | } |
| 535 | |
| 536 | /* (type-fields <gdb:type>) -> list |
| 537 | Return a list of all fields. Each element is a <gdb:field> object. |
| 538 | This also supports arrays, we return a field list of one element, |
| 539 | the range type. */ |
| 540 | |
| 541 | static SCM |
| 542 | gdbscm_type_fields (SCM self) |
| 543 | { |
| 544 | type_smob *t_smob |
| 545 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 546 | struct type *type = t_smob->type; |
| 547 | struct type *containing_type; |
| 548 | SCM containing_type_scm, result; |
| 549 | int i; |
| 550 | |
| 551 | containing_type = tyscm_get_composite (type); |
| 552 | if (containing_type == NULL) |
| 553 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 554 | _(not_composite_error)); |
| 555 | |
| 556 | /* If SELF is a typedef or reference, we want the underlying type, |
| 557 | which is what tyscm_get_composite returns. */ |
| 558 | if (containing_type == type) |
| 559 | containing_type_scm = self; |
| 560 | else |
| 561 | containing_type_scm = tyscm_scm_from_type (containing_type); |
| 562 | |
| 563 | result = SCM_EOL; |
| 564 | for (i = 0; i < TYPE_NFIELDS (containing_type); ++i) |
| 565 | result = scm_cons (tyscm_make_field_smob (containing_type_scm, i), result); |
| 566 | |
| 567 | return scm_reverse_x (result, SCM_EOL); |
| 568 | } |
| 569 | |
| 570 | /* (type-tag <gdb:type>) -> string |
| 571 | Return the type's tag, or #f. */ |
| 572 | |
| 573 | static SCM |
| 574 | gdbscm_type_tag (SCM self) |
| 575 | { |
| 576 | type_smob *t_smob |
| 577 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 578 | struct type *type = t_smob->type; |
| 579 | const char *tagname = nullptr; |
| 580 | |
| 581 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 582 | || TYPE_CODE (type) == TYPE_CODE_UNION |
| 583 | || TYPE_CODE (type) == TYPE_CODE_ENUM) |
| 584 | tagname = TYPE_NAME (type); |
| 585 | |
| 586 | if (tagname == nullptr) |
| 587 | return SCM_BOOL_F; |
| 588 | return gdbscm_scm_from_c_string (tagname); |
| 589 | } |
| 590 | |
| 591 | /* (type-name <gdb:type>) -> string |
| 592 | Return the type's name, or #f. */ |
| 593 | |
| 594 | static SCM |
| 595 | gdbscm_type_name (SCM self) |
| 596 | { |
| 597 | type_smob *t_smob |
| 598 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 599 | struct type *type = t_smob->type; |
| 600 | |
| 601 | if (!TYPE_NAME (type)) |
| 602 | return SCM_BOOL_F; |
| 603 | return gdbscm_scm_from_c_string (TYPE_NAME (type)); |
| 604 | } |
| 605 | |
| 606 | /* (type-print-name <gdb:type>) -> string |
| 607 | Return the print name of type. |
| 608 | TODO: template support elided for now. */ |
| 609 | |
| 610 | static SCM |
| 611 | gdbscm_type_print_name (SCM self) |
| 612 | { |
| 613 | type_smob *t_smob |
| 614 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 615 | struct type *type = t_smob->type; |
| 616 | std::string thetype = tyscm_type_name (type); |
| 617 | SCM result = gdbscm_scm_from_c_string (thetype.c_str ()); |
| 618 | |
| 619 | return result; |
| 620 | } |
| 621 | |
| 622 | /* (type-sizeof <gdb:type>) -> integer |
| 623 | Return the size of the type represented by SELF, in bytes. */ |
| 624 | |
| 625 | static SCM |
| 626 | gdbscm_type_sizeof (SCM self) |
| 627 | { |
| 628 | type_smob *t_smob |
| 629 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 630 | struct type *type = t_smob->type; |
| 631 | |
| 632 | try |
| 633 | { |
| 634 | check_typedef (type); |
| 635 | } |
| 636 | catch (const gdb_exception &except) |
| 637 | { |
| 638 | } |
| 639 | |
| 640 | /* Ignore exceptions. */ |
| 641 | |
| 642 | return scm_from_long (TYPE_LENGTH (type)); |
| 643 | } |
| 644 | |
| 645 | /* (type-strip-typedefs <gdb:type>) -> <gdb:type> |
| 646 | Return the type, stripped of typedefs. */ |
| 647 | |
| 648 | static SCM |
| 649 | gdbscm_type_strip_typedefs (SCM self) |
| 650 | { |
| 651 | type_smob *t_smob |
| 652 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 653 | struct type *type = t_smob->type; |
| 654 | |
| 655 | gdbscm_gdb_exception exc {}; |
| 656 | try |
| 657 | { |
| 658 | type = check_typedef (type); |
| 659 | } |
| 660 | catch (const gdb_exception &except) |
| 661 | { |
| 662 | exc = unpack (except); |
| 663 | } |
| 664 | |
| 665 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 666 | return tyscm_scm_from_type (type); |
| 667 | } |
| 668 | |
| 669 | /* Strip typedefs and pointers/reference from a type. Then check that |
| 670 | it is a struct, union, or enum type. If not, return NULL. */ |
| 671 | |
| 672 | static struct type * |
| 673 | tyscm_get_composite (struct type *type) |
| 674 | { |
| 675 | |
| 676 | for (;;) |
| 677 | { |
| 678 | gdbscm_gdb_exception exc {}; |
| 679 | try |
| 680 | { |
| 681 | type = check_typedef (type); |
| 682 | } |
| 683 | catch (const gdb_exception &except) |
| 684 | { |
| 685 | exc = unpack (except); |
| 686 | } |
| 687 | |
| 688 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 689 | if (TYPE_CODE (type) != TYPE_CODE_PTR |
| 690 | && TYPE_CODE (type) != TYPE_CODE_REF) |
| 691 | break; |
| 692 | type = TYPE_TARGET_TYPE (type); |
| 693 | } |
| 694 | |
| 695 | /* If this is not a struct, union, or enum type, raise TypeError |
| 696 | exception. */ |
| 697 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT |
| 698 | && TYPE_CODE (type) != TYPE_CODE_UNION |
| 699 | && TYPE_CODE (type) != TYPE_CODE_ENUM) |
| 700 | return NULL; |
| 701 | |
| 702 | return type; |
| 703 | } |
| 704 | |
| 705 | /* Helper for tyscm_array and tyscm_vector. */ |
| 706 | |
| 707 | static SCM |
| 708 | tyscm_array_1 (SCM self, SCM n1_scm, SCM n2_scm, int is_vector, |
| 709 | const char *func_name) |
| 710 | { |
| 711 | type_smob *t_smob |
| 712 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, func_name); |
| 713 | struct type *type = t_smob->type; |
| 714 | long n1, n2 = 0; |
| 715 | struct type *array = NULL; |
| 716 | |
| 717 | gdbscm_parse_function_args (func_name, SCM_ARG2, NULL, "l|l", |
| 718 | n1_scm, &n1, n2_scm, &n2); |
| 719 | |
| 720 | if (SCM_UNBNDP (n2_scm)) |
| 721 | { |
| 722 | n2 = n1; |
| 723 | n1 = 0; |
| 724 | } |
| 725 | |
| 726 | if (n2 < n1 - 1) /* Note: An empty array has n2 == n1 - 1. */ |
| 727 | { |
| 728 | gdbscm_out_of_range_error (func_name, SCM_ARG3, |
| 729 | scm_cons (scm_from_long (n1), |
| 730 | scm_from_long (n2)), |
| 731 | _("Array length must not be negative")); |
| 732 | } |
| 733 | |
| 734 | gdbscm_gdb_exception exc {}; |
| 735 | try |
| 736 | { |
| 737 | array = lookup_array_range_type (type, n1, n2); |
| 738 | if (is_vector) |
| 739 | make_vector_type (array); |
| 740 | } |
| 741 | catch (const gdb_exception &except) |
| 742 | { |
| 743 | exc = unpack (except); |
| 744 | } |
| 745 | |
| 746 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 747 | return tyscm_scm_from_type (array); |
| 748 | } |
| 749 | |
| 750 | /* (type-array <gdb:type> [low-bound] high-bound) -> <gdb:type> |
| 751 | The array has indices [low-bound,high-bound]. |
| 752 | If low-bound is not provided zero is used. |
| 753 | Return an array type. |
| 754 | |
| 755 | IWBN if the one argument version specified a size, not the high bound. |
| 756 | It's too easy to pass one argument thinking it is the size of the array. |
| 757 | The current semantics are for compatibility with the Python version. |
| 758 | Later we can add #:size. */ |
| 759 | |
| 760 | static SCM |
| 761 | gdbscm_type_array (SCM self, SCM n1, SCM n2) |
| 762 | { |
| 763 | return tyscm_array_1 (self, n1, n2, 0, FUNC_NAME); |
| 764 | } |
| 765 | |
| 766 | /* (type-vector <gdb:type> [low-bound] high-bound) -> <gdb:type> |
| 767 | The array has indices [low-bound,high-bound]. |
| 768 | If low-bound is not provided zero is used. |
| 769 | Return a vector type. |
| 770 | |
| 771 | IWBN if the one argument version specified a size, not the high bound. |
| 772 | It's too easy to pass one argument thinking it is the size of the array. |
| 773 | The current semantics are for compatibility with the Python version. |
| 774 | Later we can add #:size. */ |
| 775 | |
| 776 | static SCM |
| 777 | gdbscm_type_vector (SCM self, SCM n1, SCM n2) |
| 778 | { |
| 779 | return tyscm_array_1 (self, n1, n2, 1, FUNC_NAME); |
| 780 | } |
| 781 | |
| 782 | /* (type-pointer <gdb:type>) -> <gdb:type> |
| 783 | Return a <gdb:type> object which represents a pointer to SELF. */ |
| 784 | |
| 785 | static SCM |
| 786 | gdbscm_type_pointer (SCM self) |
| 787 | { |
| 788 | type_smob *t_smob |
| 789 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 790 | struct type *type = t_smob->type; |
| 791 | |
| 792 | gdbscm_gdb_exception exc {}; |
| 793 | try |
| 794 | { |
| 795 | type = lookup_pointer_type (type); |
| 796 | } |
| 797 | catch (const gdb_exception &except) |
| 798 | { |
| 799 | exc = unpack (except); |
| 800 | } |
| 801 | |
| 802 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 803 | return tyscm_scm_from_type (type); |
| 804 | } |
| 805 | |
| 806 | /* (type-range <gdb:type>) -> (low high) |
| 807 | Return the range of a type represented by SELF. The return type is |
| 808 | a list. The first element is the low bound, and the second element |
| 809 | is the high bound. */ |
| 810 | |
| 811 | static SCM |
| 812 | gdbscm_type_range (SCM self) |
| 813 | { |
| 814 | type_smob *t_smob |
| 815 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 816 | struct type *type = t_smob->type; |
| 817 | SCM low_scm, high_scm; |
| 818 | /* Initialize these to appease GCC warnings. */ |
| 819 | LONGEST low = 0, high = 0; |
| 820 | |
| 821 | SCM_ASSERT_TYPE (TYPE_CODE (type) == TYPE_CODE_ARRAY |
| 822 | || TYPE_CODE (type) == TYPE_CODE_STRING |
| 823 | || TYPE_CODE (type) == TYPE_CODE_RANGE, |
| 824 | self, SCM_ARG1, FUNC_NAME, _("ranged type")); |
| 825 | |
| 826 | switch (TYPE_CODE (type)) |
| 827 | { |
| 828 | case TYPE_CODE_ARRAY: |
| 829 | case TYPE_CODE_STRING: |
| 830 | low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); |
| 831 | high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (type)); |
| 832 | break; |
| 833 | case TYPE_CODE_RANGE: |
| 834 | low = TYPE_LOW_BOUND (type); |
| 835 | high = TYPE_HIGH_BOUND (type); |
| 836 | break; |
| 837 | } |
| 838 | |
| 839 | low_scm = gdbscm_scm_from_longest (low); |
| 840 | high_scm = gdbscm_scm_from_longest (high); |
| 841 | |
| 842 | return scm_list_2 (low_scm, high_scm); |
| 843 | } |
| 844 | |
| 845 | /* (type-reference <gdb:type>) -> <gdb:type> |
| 846 | Return a <gdb:type> object which represents a reference to SELF. */ |
| 847 | |
| 848 | static SCM |
| 849 | gdbscm_type_reference (SCM self) |
| 850 | { |
| 851 | type_smob *t_smob |
| 852 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 853 | struct type *type = t_smob->type; |
| 854 | |
| 855 | gdbscm_gdb_exception exc {}; |
| 856 | try |
| 857 | { |
| 858 | type = lookup_lvalue_reference_type (type); |
| 859 | } |
| 860 | catch (const gdb_exception &except) |
| 861 | { |
| 862 | exc = unpack (except); |
| 863 | } |
| 864 | |
| 865 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 866 | return tyscm_scm_from_type (type); |
| 867 | } |
| 868 | |
| 869 | /* (type-target <gdb:type>) -> <gdb:type> |
| 870 | Return a <gdb:type> object which represents the target type of SELF. */ |
| 871 | |
| 872 | static SCM |
| 873 | gdbscm_type_target (SCM self) |
| 874 | { |
| 875 | type_smob *t_smob |
| 876 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 877 | struct type *type = t_smob->type; |
| 878 | |
| 879 | SCM_ASSERT (TYPE_TARGET_TYPE (type), self, SCM_ARG1, FUNC_NAME); |
| 880 | |
| 881 | return tyscm_scm_from_type (TYPE_TARGET_TYPE (type)); |
| 882 | } |
| 883 | |
| 884 | /* (type-const <gdb:type>) -> <gdb:type> |
| 885 | Return a const-qualified type variant. */ |
| 886 | |
| 887 | static SCM |
| 888 | gdbscm_type_const (SCM self) |
| 889 | { |
| 890 | type_smob *t_smob |
| 891 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 892 | struct type *type = t_smob->type; |
| 893 | |
| 894 | gdbscm_gdb_exception exc {}; |
| 895 | try |
| 896 | { |
| 897 | type = make_cv_type (1, 0, type, NULL); |
| 898 | } |
| 899 | catch (const gdb_exception &except) |
| 900 | { |
| 901 | exc = unpack (except); |
| 902 | } |
| 903 | |
| 904 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 905 | return tyscm_scm_from_type (type); |
| 906 | } |
| 907 | |
| 908 | /* (type-volatile <gdb:type>) -> <gdb:type> |
| 909 | Return a volatile-qualified type variant. */ |
| 910 | |
| 911 | static SCM |
| 912 | gdbscm_type_volatile (SCM self) |
| 913 | { |
| 914 | type_smob *t_smob |
| 915 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 916 | struct type *type = t_smob->type; |
| 917 | |
| 918 | gdbscm_gdb_exception exc {}; |
| 919 | try |
| 920 | { |
| 921 | type = make_cv_type (0, 1, type, NULL); |
| 922 | } |
| 923 | catch (const gdb_exception &except) |
| 924 | { |
| 925 | exc = unpack (except); |
| 926 | } |
| 927 | |
| 928 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 929 | return tyscm_scm_from_type (type); |
| 930 | } |
| 931 | |
| 932 | /* (type-unqualified <gdb:type>) -> <gdb:type> |
| 933 | Return an unqualified type variant. */ |
| 934 | |
| 935 | static SCM |
| 936 | gdbscm_type_unqualified (SCM self) |
| 937 | { |
| 938 | type_smob *t_smob |
| 939 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 940 | struct type *type = t_smob->type; |
| 941 | |
| 942 | gdbscm_gdb_exception exc {}; |
| 943 | try |
| 944 | { |
| 945 | type = make_cv_type (0, 0, type, NULL); |
| 946 | } |
| 947 | catch (const gdb_exception &except) |
| 948 | { |
| 949 | exc = unpack (except); |
| 950 | } |
| 951 | |
| 952 | GDBSCM_HANDLE_GDB_EXCEPTION (exc); |
| 953 | return tyscm_scm_from_type (type); |
| 954 | } |
| 955 | \f |
| 956 | /* Field related accessors of types. */ |
| 957 | |
| 958 | /* (type-num-fields <gdb:type>) -> integer |
| 959 | Return number of fields. */ |
| 960 | |
| 961 | static SCM |
| 962 | gdbscm_type_num_fields (SCM self) |
| 963 | { |
| 964 | type_smob *t_smob |
| 965 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 966 | struct type *type = t_smob->type; |
| 967 | |
| 968 | type = tyscm_get_composite (type); |
| 969 | if (type == NULL) |
| 970 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 971 | _(not_composite_error)); |
| 972 | |
| 973 | return scm_from_long (TYPE_NFIELDS (type)); |
| 974 | } |
| 975 | |
| 976 | /* (type-field <gdb:type> string) -> <gdb:field> |
| 977 | Return the <gdb:field> object for the field named by the argument. */ |
| 978 | |
| 979 | static SCM |
| 980 | gdbscm_type_field (SCM self, SCM field_scm) |
| 981 | { |
| 982 | type_smob *t_smob |
| 983 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 984 | struct type *type = t_smob->type; |
| 985 | |
| 986 | SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME, |
| 987 | _("string")); |
| 988 | |
| 989 | /* We want just fields of this type, not of base types, so instead of |
| 990 | using lookup_struct_elt_type, portions of that function are |
| 991 | copied here. */ |
| 992 | |
| 993 | type = tyscm_get_composite (type); |
| 994 | if (type == NULL) |
| 995 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 996 | _(not_composite_error)); |
| 997 | |
| 998 | { |
| 999 | gdb::unique_xmalloc_ptr<char> field = gdbscm_scm_to_c_string (field_scm); |
| 1000 | |
| 1001 | for (int i = 0; i < TYPE_NFIELDS (type); i++) |
| 1002 | { |
| 1003 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 1004 | |
| 1005 | if (t_field_name && (strcmp_iw (t_field_name, field.get ()) == 0)) |
| 1006 | { |
| 1007 | field.reset (nullptr); |
| 1008 | return tyscm_make_field_smob (self, i); |
| 1009 | } |
| 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, field_scm, |
| 1014 | _("Unknown field")); |
| 1015 | } |
| 1016 | |
| 1017 | /* (type-has-field? <gdb:type> string) -> boolean |
| 1018 | Return boolean indicating if type SELF has FIELD_SCM (a string). */ |
| 1019 | |
| 1020 | static SCM |
| 1021 | gdbscm_type_has_field_p (SCM self, SCM field_scm) |
| 1022 | { |
| 1023 | type_smob *t_smob |
| 1024 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1025 | struct type *type = t_smob->type; |
| 1026 | |
| 1027 | SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME, |
| 1028 | _("string")); |
| 1029 | |
| 1030 | /* We want just fields of this type, not of base types, so instead of |
| 1031 | using lookup_struct_elt_type, portions of that function are |
| 1032 | copied here. */ |
| 1033 | |
| 1034 | type = tyscm_get_composite (type); |
| 1035 | if (type == NULL) |
| 1036 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 1037 | _(not_composite_error)); |
| 1038 | |
| 1039 | { |
| 1040 | gdb::unique_xmalloc_ptr<char> field |
| 1041 | = gdbscm_scm_to_c_string (field_scm); |
| 1042 | |
| 1043 | for (int i = 0; i < TYPE_NFIELDS (type); i++) |
| 1044 | { |
| 1045 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 1046 | |
| 1047 | if (t_field_name && (strcmp_iw (t_field_name, field.get ()) == 0)) |
| 1048 | return SCM_BOOL_T; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | return SCM_BOOL_F; |
| 1053 | } |
| 1054 | |
| 1055 | /* (make-field-iterator <gdb:type>) -> <gdb:iterator> |
| 1056 | Make a field iterator object. */ |
| 1057 | |
| 1058 | static SCM |
| 1059 | gdbscm_make_field_iterator (SCM self) |
| 1060 | { |
| 1061 | type_smob *t_smob |
| 1062 | = tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1063 | struct type *type = t_smob->type; |
| 1064 | struct type *containing_type; |
| 1065 | SCM containing_type_scm; |
| 1066 | |
| 1067 | containing_type = tyscm_get_composite (type); |
| 1068 | if (containing_type == NULL) |
| 1069 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, |
| 1070 | _(not_composite_error)); |
| 1071 | |
| 1072 | /* If SELF is a typedef or reference, we want the underlying type, |
| 1073 | which is what tyscm_get_composite returns. */ |
| 1074 | if (containing_type == type) |
| 1075 | containing_type_scm = self; |
| 1076 | else |
| 1077 | containing_type_scm = tyscm_scm_from_type (containing_type); |
| 1078 | |
| 1079 | return gdbscm_make_iterator (containing_type_scm, scm_from_int (0), |
| 1080 | tyscm_next_field_x_proc); |
| 1081 | } |
| 1082 | |
| 1083 | /* (type-next-field! <gdb:iterator>) -> <gdb:field> |
| 1084 | Return the next field in the iteration through the list of fields of the |
| 1085 | type, or (end-of-iteration). |
| 1086 | SELF is a <gdb:iterator> object created by gdbscm_make_field_iterator. |
| 1087 | This is the next! <gdb:iterator> function, not exported to the user. */ |
| 1088 | |
| 1089 | static SCM |
| 1090 | gdbscm_type_next_field_x (SCM self) |
| 1091 | { |
| 1092 | iterator_smob *i_smob; |
| 1093 | type_smob *t_smob; |
| 1094 | struct type *type; |
| 1095 | SCM it_scm, result, progress, object; |
| 1096 | int field; |
| 1097 | |
| 1098 | it_scm = itscm_get_iterator_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1099 | i_smob = (iterator_smob *) SCM_SMOB_DATA (it_scm); |
| 1100 | object = itscm_iterator_smob_object (i_smob); |
| 1101 | progress = itscm_iterator_smob_progress (i_smob); |
| 1102 | |
| 1103 | SCM_ASSERT_TYPE (tyscm_is_type (object), object, |
| 1104 | SCM_ARG1, FUNC_NAME, type_smob_name); |
| 1105 | t_smob = (type_smob *) SCM_SMOB_DATA (object); |
| 1106 | type = t_smob->type; |
| 1107 | |
| 1108 | SCM_ASSERT_TYPE (scm_is_signed_integer (progress, |
| 1109 | 0, TYPE_NFIELDS (type)), |
| 1110 | progress, SCM_ARG1, FUNC_NAME, _("integer")); |
| 1111 | field = scm_to_int (progress); |
| 1112 | |
| 1113 | if (field < TYPE_NFIELDS (type)) |
| 1114 | { |
| 1115 | result = tyscm_make_field_smob (object, field); |
| 1116 | itscm_set_iterator_smob_progress_x (i_smob, scm_from_int (field + 1)); |
| 1117 | return result; |
| 1118 | } |
| 1119 | |
| 1120 | return gdbscm_end_of_iteration (); |
| 1121 | } |
| 1122 | \f |
| 1123 | /* Field smob accessors. */ |
| 1124 | |
| 1125 | /* (field-name <gdb:field>) -> string |
| 1126 | Return the name of this field or #f if there isn't one. */ |
| 1127 | |
| 1128 | static SCM |
| 1129 | gdbscm_field_name (SCM self) |
| 1130 | { |
| 1131 | field_smob *f_smob |
| 1132 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1133 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1134 | |
| 1135 | if (FIELD_NAME (*field)) |
| 1136 | return gdbscm_scm_from_c_string (FIELD_NAME (*field)); |
| 1137 | return SCM_BOOL_F; |
| 1138 | } |
| 1139 | |
| 1140 | /* (field-type <gdb:field>) -> <gdb:type> |
| 1141 | Return the <gdb:type> object of the field or #f if there isn't one. */ |
| 1142 | |
| 1143 | static SCM |
| 1144 | gdbscm_field_type (SCM self) |
| 1145 | { |
| 1146 | field_smob *f_smob |
| 1147 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1148 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1149 | |
| 1150 | /* A field can have a NULL type in some situations. */ |
| 1151 | if (FIELD_TYPE (*field)) |
| 1152 | return tyscm_scm_from_type (FIELD_TYPE (*field)); |
| 1153 | return SCM_BOOL_F; |
| 1154 | } |
| 1155 | |
| 1156 | /* (field-enumval <gdb:field>) -> integer |
| 1157 | For enum values, return its value as an integer. */ |
| 1158 | |
| 1159 | static SCM |
| 1160 | gdbscm_field_enumval (SCM self) |
| 1161 | { |
| 1162 | field_smob *f_smob |
| 1163 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1164 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1165 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1166 | |
| 1167 | SCM_ASSERT_TYPE (TYPE_CODE (type) == TYPE_CODE_ENUM, |
| 1168 | self, SCM_ARG1, FUNC_NAME, _("enum type")); |
| 1169 | |
| 1170 | return scm_from_long (FIELD_ENUMVAL (*field)); |
| 1171 | } |
| 1172 | |
| 1173 | /* (field-bitpos <gdb:field>) -> integer |
| 1174 | For bitfields, return its offset in bits. */ |
| 1175 | |
| 1176 | static SCM |
| 1177 | gdbscm_field_bitpos (SCM self) |
| 1178 | { |
| 1179 | field_smob *f_smob |
| 1180 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1181 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1182 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1183 | |
| 1184 | SCM_ASSERT_TYPE (TYPE_CODE (type) != TYPE_CODE_ENUM, |
| 1185 | self, SCM_ARG1, FUNC_NAME, _("non-enum type")); |
| 1186 | |
| 1187 | return scm_from_long (FIELD_BITPOS (*field)); |
| 1188 | } |
| 1189 | |
| 1190 | /* (field-bitsize <gdb:field>) -> integer |
| 1191 | Return the size of the field in bits. */ |
| 1192 | |
| 1193 | static SCM |
| 1194 | gdbscm_field_bitsize (SCM self) |
| 1195 | { |
| 1196 | field_smob *f_smob |
| 1197 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1198 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1199 | |
| 1200 | return scm_from_long (FIELD_BITPOS (*field)); |
| 1201 | } |
| 1202 | |
| 1203 | /* (field-artificial? <gdb:field>) -> boolean |
| 1204 | Return #t if field is artificial. */ |
| 1205 | |
| 1206 | static SCM |
| 1207 | gdbscm_field_artificial_p (SCM self) |
| 1208 | { |
| 1209 | field_smob *f_smob |
| 1210 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1211 | struct field *field = tyscm_field_smob_to_field (f_smob); |
| 1212 | |
| 1213 | return scm_from_bool (FIELD_ARTIFICIAL (*field)); |
| 1214 | } |
| 1215 | |
| 1216 | /* (field-baseclass? <gdb:field>) -> boolean |
| 1217 | Return #t if field is a baseclass. */ |
| 1218 | |
| 1219 | static SCM |
| 1220 | gdbscm_field_baseclass_p (SCM self) |
| 1221 | { |
| 1222 | field_smob *f_smob |
| 1223 | = tyscm_get_field_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 1224 | struct type *type = tyscm_field_smob_containing_type (f_smob); |
| 1225 | |
| 1226 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 1227 | return scm_from_bool (f_smob->field_num < TYPE_N_BASECLASSES (type)); |
| 1228 | return SCM_BOOL_F; |
| 1229 | } |
| 1230 | \f |
| 1231 | /* Return the type named TYPE_NAME in BLOCK. |
| 1232 | Returns NULL if not found. |
| 1233 | This routine does not throw an error. */ |
| 1234 | |
| 1235 | static struct type * |
| 1236 | tyscm_lookup_typename (const char *type_name, const struct block *block) |
| 1237 | { |
| 1238 | struct type *type = NULL; |
| 1239 | |
| 1240 | try |
| 1241 | { |
| 1242 | if (startswith (type_name, "struct ")) |
| 1243 | type = lookup_struct (type_name + 7, NULL); |
| 1244 | else if (startswith (type_name, "union ")) |
| 1245 | type = lookup_union (type_name + 6, NULL); |
| 1246 | else if (startswith (type_name, "enum ")) |
| 1247 | type = lookup_enum (type_name + 5, NULL); |
| 1248 | else |
| 1249 | type = lookup_typename (current_language, get_current_arch (), |
| 1250 | type_name, block, 0); |
| 1251 | } |
| 1252 | catch (const gdb_exception &except) |
| 1253 | { |
| 1254 | return NULL; |
| 1255 | } |
| 1256 | |
| 1257 | return type; |
| 1258 | } |
| 1259 | |
| 1260 | /* (lookup-type name [#:block <gdb:block>]) -> <gdb:type> |
| 1261 | TODO: legacy template support left out until needed. */ |
| 1262 | |
| 1263 | static SCM |
| 1264 | gdbscm_lookup_type (SCM name_scm, SCM rest) |
| 1265 | { |
| 1266 | SCM keywords[] = { block_keyword, SCM_BOOL_F }; |
| 1267 | char *name; |
| 1268 | SCM block_scm = SCM_BOOL_F; |
| 1269 | int block_arg_pos = -1; |
| 1270 | const struct block *block = NULL; |
| 1271 | struct type *type; |
| 1272 | |
| 1273 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#O", |
| 1274 | name_scm, &name, |
| 1275 | rest, &block_arg_pos, &block_scm); |
| 1276 | |
| 1277 | if (block_arg_pos != -1) |
| 1278 | { |
| 1279 | SCM exception; |
| 1280 | |
| 1281 | block = bkscm_scm_to_block (block_scm, block_arg_pos, FUNC_NAME, |
| 1282 | &exception); |
| 1283 | if (block == NULL) |
| 1284 | { |
| 1285 | xfree (name); |
| 1286 | gdbscm_throw (exception); |
| 1287 | } |
| 1288 | } |
| 1289 | type = tyscm_lookup_typename (name, block); |
| 1290 | xfree (name); |
| 1291 | |
| 1292 | if (type != NULL) |
| 1293 | return tyscm_scm_from_type (type); |
| 1294 | return SCM_BOOL_F; |
| 1295 | } |
| 1296 | \f |
| 1297 | /* Initialize the Scheme type code. */ |
| 1298 | |
| 1299 | |
| 1300 | static const scheme_integer_constant type_integer_constants[] = |
| 1301 | { |
| 1302 | #define X(SYM) { #SYM, SYM } |
| 1303 | X (TYPE_CODE_BITSTRING), |
| 1304 | X (TYPE_CODE_PTR), |
| 1305 | X (TYPE_CODE_ARRAY), |
| 1306 | X (TYPE_CODE_STRUCT), |
| 1307 | X (TYPE_CODE_UNION), |
| 1308 | X (TYPE_CODE_ENUM), |
| 1309 | X (TYPE_CODE_FLAGS), |
| 1310 | X (TYPE_CODE_FUNC), |
| 1311 | X (TYPE_CODE_INT), |
| 1312 | X (TYPE_CODE_FLT), |
| 1313 | X (TYPE_CODE_VOID), |
| 1314 | X (TYPE_CODE_SET), |
| 1315 | X (TYPE_CODE_RANGE), |
| 1316 | X (TYPE_CODE_STRING), |
| 1317 | X (TYPE_CODE_ERROR), |
| 1318 | X (TYPE_CODE_METHOD), |
| 1319 | X (TYPE_CODE_METHODPTR), |
| 1320 | X (TYPE_CODE_MEMBERPTR), |
| 1321 | X (TYPE_CODE_REF), |
| 1322 | X (TYPE_CODE_CHAR), |
| 1323 | X (TYPE_CODE_BOOL), |
| 1324 | X (TYPE_CODE_COMPLEX), |
| 1325 | X (TYPE_CODE_TYPEDEF), |
| 1326 | X (TYPE_CODE_NAMESPACE), |
| 1327 | X (TYPE_CODE_DECFLOAT), |
| 1328 | X (TYPE_CODE_INTERNAL_FUNCTION), |
| 1329 | #undef X |
| 1330 | |
| 1331 | END_INTEGER_CONSTANTS |
| 1332 | }; |
| 1333 | |
| 1334 | static const scheme_function type_functions[] = |
| 1335 | { |
| 1336 | { "type?", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_p), |
| 1337 | "\ |
| 1338 | Return #t if the object is a <gdb:type> object." }, |
| 1339 | |
| 1340 | { "lookup-type", 1, 0, 1, as_a_scm_t_subr (gdbscm_lookup_type), |
| 1341 | "\ |
| 1342 | Return the <gdb:type> object representing string or #f if not found.\n\ |
| 1343 | If block is given then the type is looked for in that block.\n\ |
| 1344 | \n\ |
| 1345 | Arguments: string [#:block <gdb:block>]" }, |
| 1346 | |
| 1347 | { "type-code", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_code), |
| 1348 | "\ |
| 1349 | Return the code of the type" }, |
| 1350 | |
| 1351 | { "type-tag", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_tag), |
| 1352 | "\ |
| 1353 | Return the tag name of the type, or #f if there isn't one." }, |
| 1354 | |
| 1355 | { "type-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_name), |
| 1356 | "\ |
| 1357 | Return the name of the type as a string, or #f if there isn't one." }, |
| 1358 | |
| 1359 | { "type-print-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_print_name), |
| 1360 | "\ |
| 1361 | Return the print name of the type as a string." }, |
| 1362 | |
| 1363 | { "type-sizeof", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_sizeof), |
| 1364 | "\ |
| 1365 | Return the size of the type, in bytes." }, |
| 1366 | |
| 1367 | { "type-strip-typedefs", 1, 0, 0, |
| 1368 | as_a_scm_t_subr (gdbscm_type_strip_typedefs), |
| 1369 | "\ |
| 1370 | Return a type formed by stripping the type of all typedefs." }, |
| 1371 | |
| 1372 | { "type-array", 2, 1, 0, as_a_scm_t_subr (gdbscm_type_array), |
| 1373 | "\ |
| 1374 | Return a type representing an array of objects of the type.\n\ |
| 1375 | \n\ |
| 1376 | Arguments: <gdb:type> [low-bound] high-bound\n\ |
| 1377 | If low-bound is not provided zero is used.\n\ |
| 1378 | N.B. If only the high-bound parameter is specified, it is not\n\ |
| 1379 | the array size.\n\ |
| 1380 | Valid bounds for array indices are [low-bound,high-bound]." }, |
| 1381 | |
| 1382 | { "type-vector", 2, 1, 0, as_a_scm_t_subr (gdbscm_type_vector), |
| 1383 | "\ |
| 1384 | Return a type representing a vector of objects of the type.\n\ |
| 1385 | Vectors differ from arrays in that if the current language has C-style\n\ |
| 1386 | arrays, vectors don't decay to a pointer to the first element.\n\ |
| 1387 | They are first class values.\n\ |
| 1388 | \n\ |
| 1389 | Arguments: <gdb:type> [low-bound] high-bound\n\ |
| 1390 | If low-bound is not provided zero is used.\n\ |
| 1391 | N.B. If only the high-bound parameter is specified, it is not\n\ |
| 1392 | the array size.\n\ |
| 1393 | Valid bounds for array indices are [low-bound,high-bound]." }, |
| 1394 | |
| 1395 | { "type-pointer", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_pointer), |
| 1396 | "\ |
| 1397 | Return a type of pointer to the type." }, |
| 1398 | |
| 1399 | { "type-range", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_range), |
| 1400 | "\ |
| 1401 | Return (low high) representing the range for the type." }, |
| 1402 | |
| 1403 | { "type-reference", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_reference), |
| 1404 | "\ |
| 1405 | Return a type of reference to the type." }, |
| 1406 | |
| 1407 | { "type-target", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_target), |
| 1408 | "\ |
| 1409 | Return the target type of the type." }, |
| 1410 | |
| 1411 | { "type-const", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_const), |
| 1412 | "\ |
| 1413 | Return a const variant of the type." }, |
| 1414 | |
| 1415 | { "type-volatile", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_volatile), |
| 1416 | "\ |
| 1417 | Return a volatile variant of the type." }, |
| 1418 | |
| 1419 | { "type-unqualified", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_unqualified), |
| 1420 | "\ |
| 1421 | Return a variant of the type without const or volatile attributes." }, |
| 1422 | |
| 1423 | { "type-num-fields", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_num_fields), |
| 1424 | "\ |
| 1425 | Return the number of fields of the type." }, |
| 1426 | |
| 1427 | { "type-fields", 1, 0, 0, as_a_scm_t_subr (gdbscm_type_fields), |
| 1428 | "\ |
| 1429 | Return the list of <gdb:field> objects of fields of the type." }, |
| 1430 | |
| 1431 | { "make-field-iterator", 1, 0, 0, |
| 1432 | as_a_scm_t_subr (gdbscm_make_field_iterator), |
| 1433 | "\ |
| 1434 | Return a <gdb:iterator> object for iterating over the fields of the type." }, |
| 1435 | |
| 1436 | { "type-field", 2, 0, 0, as_a_scm_t_subr (gdbscm_type_field), |
| 1437 | "\ |
| 1438 | Return the field named by string of the type.\n\ |
| 1439 | \n\ |
| 1440 | Arguments: <gdb:type> string" }, |
| 1441 | |
| 1442 | { "type-has-field?", 2, 0, 0, as_a_scm_t_subr (gdbscm_type_has_field_p), |
| 1443 | "\ |
| 1444 | Return #t if the type has field named string.\n\ |
| 1445 | \n\ |
| 1446 | Arguments: <gdb:type> string" }, |
| 1447 | |
| 1448 | { "field?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_p), |
| 1449 | "\ |
| 1450 | Return #t if the object is a <gdb:field> object." }, |
| 1451 | |
| 1452 | { "field-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_name), |
| 1453 | "\ |
| 1454 | Return the name of the field." }, |
| 1455 | |
| 1456 | { "field-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_type), |
| 1457 | "\ |
| 1458 | Return the type of the field." }, |
| 1459 | |
| 1460 | { "field-enumval", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_enumval), |
| 1461 | "\ |
| 1462 | Return the enum value represented by the field." }, |
| 1463 | |
| 1464 | { "field-bitpos", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_bitpos), |
| 1465 | "\ |
| 1466 | Return the offset in bits of the field in its containing type." }, |
| 1467 | |
| 1468 | { "field-bitsize", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_bitsize), |
| 1469 | "\ |
| 1470 | Return the size of the field in bits." }, |
| 1471 | |
| 1472 | { "field-artificial?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_artificial_p), |
| 1473 | "\ |
| 1474 | Return #t if the field is artificial." }, |
| 1475 | |
| 1476 | { "field-baseclass?", 1, 0, 0, as_a_scm_t_subr (gdbscm_field_baseclass_p), |
| 1477 | "\ |
| 1478 | Return #t if the field is a baseclass." }, |
| 1479 | |
| 1480 | END_FUNCTIONS |
| 1481 | }; |
| 1482 | |
| 1483 | void |
| 1484 | gdbscm_initialize_types (void) |
| 1485 | { |
| 1486 | type_smob_tag = gdbscm_make_smob_type (type_smob_name, sizeof (type_smob)); |
| 1487 | scm_set_smob_free (type_smob_tag, tyscm_free_type_smob); |
| 1488 | scm_set_smob_print (type_smob_tag, tyscm_print_type_smob); |
| 1489 | scm_set_smob_equalp (type_smob_tag, tyscm_equal_p_type_smob); |
| 1490 | |
| 1491 | field_smob_tag = gdbscm_make_smob_type (field_smob_name, |
| 1492 | sizeof (field_smob)); |
| 1493 | scm_set_smob_print (field_smob_tag, tyscm_print_field_smob); |
| 1494 | |
| 1495 | gdbscm_define_integer_constants (type_integer_constants, 1); |
| 1496 | gdbscm_define_functions (type_functions, 1); |
| 1497 | |
| 1498 | /* This function is "private". */ |
| 1499 | tyscm_next_field_x_proc |
| 1500 | = scm_c_define_gsubr ("%type-next-field!", 1, 0, 0, |
| 1501 | as_a_scm_t_subr (gdbscm_type_next_field_x)); |
| 1502 | scm_set_procedure_property_x (tyscm_next_field_x_proc, |
| 1503 | gdbscm_documentation_symbol, |
| 1504 | gdbscm_scm_from_c_string ("\ |
| 1505 | Internal function to assist the type fields iterator.")); |
| 1506 | |
| 1507 | block_keyword = scm_from_latin1_keyword ("block"); |
| 1508 | |
| 1509 | /* Register an objfile "free" callback so we can properly copy types |
| 1510 | associated with the objfile when it's about to be deleted. */ |
| 1511 | tyscm_objfile_data_key |
| 1512 | = register_objfile_data_with_cleanup (save_objfile_types, NULL); |
| 1513 | |
| 1514 | global_types_map = gdbscm_create_eqable_gsmob_ptr_map (tyscm_hash_type_smob, |
| 1515 | tyscm_eq_type_smob); |
| 1516 | } |