| 1 | /* Scheme interface to symbol tables. |
| 2 | |
| 3 | Copyright (C) 2008-2014 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 "symtab.h" |
| 25 | #include "source.h" |
| 26 | #include "objfiles.h" |
| 27 | #include "block.h" |
| 28 | #include "guile-internal.h" |
| 29 | |
| 30 | /* A <gdb:symtab> smob. */ |
| 31 | |
| 32 | typedef struct |
| 33 | { |
| 34 | /* This always appears first. |
| 35 | eqable_gdb_smob is used so that symtabs are eq?-able. |
| 36 | Also, a symtab object is associated with an objfile. eqable_gdb_smob |
| 37 | lets us track the lifetime of all symtabs associated with an objfile. |
| 38 | When an objfile is deleted we need to invalidate the symtab object. */ |
| 39 | eqable_gdb_smob base; |
| 40 | |
| 41 | /* The GDB symbol table structure. |
| 42 | If this is NULL the symtab is invalid. This can happen when the |
| 43 | underlying objfile is freed. */ |
| 44 | struct symtab *symtab; |
| 45 | } symtab_smob; |
| 46 | |
| 47 | /* A <gdb:sal> smob. |
| 48 | A smob describing a gdb symtab-and-line object. |
| 49 | A sal is associated with an objfile. All access must be gated by checking |
| 50 | the validity of symtab_scm. |
| 51 | TODO: Sals are not eq?-able at the moment, or even comparable. */ |
| 52 | |
| 53 | typedef struct |
| 54 | { |
| 55 | /* This always appears first. */ |
| 56 | gdb_smob base; |
| 57 | |
| 58 | /* The <gdb:symtab> object of the symtab. |
| 59 | We store this instead of a pointer to the symtab_smob because it's not |
| 60 | clear GC will know the symtab_smob is referenced by us otherwise, and we |
| 61 | need quick access to symtab_smob->symtab to know if this sal is valid. */ |
| 62 | SCM symtab_scm; |
| 63 | |
| 64 | /* The GDB symbol table and line structure. |
| 65 | This object is ephemeral in GDB, so keep our own copy. |
| 66 | The symtab pointer in this struct is not usable: If the symtab is deleted |
| 67 | this pointer will not be updated. Use symtab_scm instead to determine |
| 68 | if this sal is valid. */ |
| 69 | struct symtab_and_line sal; |
| 70 | } sal_smob; |
| 71 | |
| 72 | static const char symtab_smob_name[] = "gdb:symtab"; |
| 73 | /* "symtab-and-line" is pretty long, and "sal" is short and unique. */ |
| 74 | static const char sal_smob_name[] = "gdb:sal"; |
| 75 | |
| 76 | /* The tags Guile knows the symbol table smobs by. */ |
| 77 | static scm_t_bits symtab_smob_tag; |
| 78 | static scm_t_bits sal_smob_tag; |
| 79 | |
| 80 | static const struct objfile_data *stscm_objfile_data_key; |
| 81 | \f |
| 82 | /* Administrivia for symtab smobs. */ |
| 83 | |
| 84 | /* Helper function to hash a symbol_smob. */ |
| 85 | |
| 86 | static hashval_t |
| 87 | stscm_hash_symtab_smob (const void *p) |
| 88 | { |
| 89 | const symtab_smob *st_smob = p; |
| 90 | |
| 91 | return htab_hash_pointer (st_smob->symtab); |
| 92 | } |
| 93 | |
| 94 | /* Helper function to compute equality of symtab_smobs. */ |
| 95 | |
| 96 | static int |
| 97 | stscm_eq_symtab_smob (const void *ap, const void *bp) |
| 98 | { |
| 99 | const symtab_smob *a = ap; |
| 100 | const symtab_smob *b = bp; |
| 101 | |
| 102 | return (a->symtab == b->symtab |
| 103 | && a->symtab != NULL); |
| 104 | } |
| 105 | |
| 106 | /* Return the struct symtab pointer -> SCM mapping table. |
| 107 | It is created if necessary. */ |
| 108 | |
| 109 | static htab_t |
| 110 | stscm_objfile_symtab_map (struct symtab *symtab) |
| 111 | { |
| 112 | struct objfile *objfile = symtab->objfile; |
| 113 | htab_t htab = objfile_data (objfile, stscm_objfile_data_key); |
| 114 | |
| 115 | if (htab == NULL) |
| 116 | { |
| 117 | htab = gdbscm_create_eqable_gsmob_ptr_map (stscm_hash_symtab_smob, |
| 118 | stscm_eq_symtab_smob); |
| 119 | set_objfile_data (objfile, stscm_objfile_data_key, htab); |
| 120 | } |
| 121 | |
| 122 | return htab; |
| 123 | } |
| 124 | |
| 125 | /* The smob "mark" function for <gdb:symtab>. */ |
| 126 | |
| 127 | static SCM |
| 128 | stscm_mark_symtab_smob (SCM self) |
| 129 | { |
| 130 | symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (self); |
| 131 | |
| 132 | /* Do this last. */ |
| 133 | return gdbscm_mark_eqable_gsmob (&st_smob->base); |
| 134 | } |
| 135 | |
| 136 | /* The smob "free" function for <gdb:symtab>. */ |
| 137 | |
| 138 | static size_t |
| 139 | stscm_free_symtab_smob (SCM self) |
| 140 | { |
| 141 | symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (self); |
| 142 | |
| 143 | if (st_smob->symtab != NULL) |
| 144 | { |
| 145 | htab_t htab = stscm_objfile_symtab_map (st_smob->symtab); |
| 146 | |
| 147 | gdbscm_clear_eqable_gsmob_ptr_slot (htab, &st_smob->base); |
| 148 | } |
| 149 | |
| 150 | /* Not necessary, done to catch bugs. */ |
| 151 | st_smob->symtab = NULL; |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | /* The smob "print" function for <gdb:symtab>. */ |
| 157 | |
| 158 | static int |
| 159 | stscm_print_symtab_smob (SCM self, SCM port, scm_print_state *pstate) |
| 160 | { |
| 161 | symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (self); |
| 162 | |
| 163 | gdbscm_printf (port, "#<%s ", symtab_smob_name); |
| 164 | gdbscm_printf (port, "%s", |
| 165 | st_smob->symtab != NULL |
| 166 | ? symtab_to_filename_for_display (st_smob->symtab) |
| 167 | : "<invalid>"); |
| 168 | scm_puts (">", port); |
| 169 | |
| 170 | scm_remember_upto_here_1 (self); |
| 171 | |
| 172 | /* Non-zero means success. */ |
| 173 | return 1; |
| 174 | } |
| 175 | |
| 176 | /* Low level routine to create a <gdb:symtab> object. */ |
| 177 | |
| 178 | static SCM |
| 179 | stscm_make_symtab_smob (void) |
| 180 | { |
| 181 | symtab_smob *st_smob = (symtab_smob *) |
| 182 | scm_gc_malloc (sizeof (symtab_smob), symtab_smob_name); |
| 183 | SCM st_scm; |
| 184 | |
| 185 | st_smob->symtab = NULL; |
| 186 | st_scm = scm_new_smob (symtab_smob_tag, (scm_t_bits) st_smob); |
| 187 | gdbscm_init_eqable_gsmob (&st_smob->base, st_scm); |
| 188 | |
| 189 | return st_scm; |
| 190 | } |
| 191 | |
| 192 | /* Return non-zero if SCM is a symbol table smob. */ |
| 193 | |
| 194 | static int |
| 195 | stscm_is_symtab (SCM scm) |
| 196 | { |
| 197 | return SCM_SMOB_PREDICATE (symtab_smob_tag, scm); |
| 198 | } |
| 199 | |
| 200 | /* (symtab? object) -> boolean */ |
| 201 | |
| 202 | static SCM |
| 203 | gdbscm_symtab_p (SCM scm) |
| 204 | { |
| 205 | return scm_from_bool (stscm_is_symtab (scm)); |
| 206 | } |
| 207 | |
| 208 | /* Create a new <gdb:symtab> object that encapsulates SYMTAB. */ |
| 209 | |
| 210 | SCM |
| 211 | stscm_scm_from_symtab (struct symtab *symtab) |
| 212 | { |
| 213 | htab_t htab; |
| 214 | eqable_gdb_smob **slot; |
| 215 | symtab_smob *st_smob, st_smob_for_lookup; |
| 216 | SCM st_scm; |
| 217 | |
| 218 | /* If we've already created a gsmob for this symtab, return it. |
| 219 | This makes symtabs eq?-able. */ |
| 220 | htab = stscm_objfile_symtab_map (symtab); |
| 221 | st_smob_for_lookup.symtab = symtab; |
| 222 | slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &st_smob_for_lookup.base); |
| 223 | if (*slot != NULL) |
| 224 | return (*slot)->containing_scm; |
| 225 | |
| 226 | st_scm = stscm_make_symtab_smob (); |
| 227 | st_smob = (symtab_smob *) SCM_SMOB_DATA (st_scm); |
| 228 | st_smob->symtab = symtab; |
| 229 | gdbscm_fill_eqable_gsmob_ptr_slot (slot, &st_smob->base); |
| 230 | |
| 231 | return st_scm; |
| 232 | } |
| 233 | |
| 234 | /* Returns the <gdb:symtab> object in SELF. |
| 235 | Throws an exception if SELF is not a <gdb:symtab> object. */ |
| 236 | |
| 237 | static SCM |
| 238 | stscm_get_symtab_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 239 | { |
| 240 | SCM_ASSERT_TYPE (stscm_is_symtab (self), self, arg_pos, func_name, |
| 241 | symtab_smob_name); |
| 242 | |
| 243 | return self; |
| 244 | } |
| 245 | |
| 246 | /* Returns a pointer to the symtab smob of SELF. |
| 247 | Throws an exception if SELF is not a <gdb:symtab> object. */ |
| 248 | |
| 249 | static symtab_smob * |
| 250 | stscm_get_symtab_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) |
| 251 | { |
| 252 | SCM st_scm = stscm_get_symtab_arg_unsafe (self, arg_pos, func_name); |
| 253 | symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (st_scm); |
| 254 | |
| 255 | return st_smob; |
| 256 | } |
| 257 | |
| 258 | /* Return non-zero if symtab ST_SMOB is valid. */ |
| 259 | |
| 260 | static int |
| 261 | stscm_is_valid (symtab_smob *st_smob) |
| 262 | { |
| 263 | return st_smob->symtab != NULL; |
| 264 | } |
| 265 | |
| 266 | /* Throw a Scheme error if SELF is not a valid symtab smob. |
| 267 | Otherwise return a pointer to the symtab_smob object. */ |
| 268 | |
| 269 | static symtab_smob * |
| 270 | stscm_get_valid_symtab_smob_arg_unsafe (SCM self, int arg_pos, |
| 271 | const char *func_name) |
| 272 | { |
| 273 | symtab_smob *st_smob |
| 274 | = stscm_get_symtab_smob_arg_unsafe (self, arg_pos, func_name); |
| 275 | |
| 276 | if (!stscm_is_valid (st_smob)) |
| 277 | { |
| 278 | gdbscm_invalid_object_error (func_name, arg_pos, self, |
| 279 | _("<gdb:symtab>")); |
| 280 | } |
| 281 | |
| 282 | return st_smob; |
| 283 | } |
| 284 | |
| 285 | /* Helper function for stscm_del_objfile_symtabs to mark the symtab |
| 286 | as invalid. */ |
| 287 | |
| 288 | static int |
| 289 | stscm_mark_symtab_invalid (void **slot, void *info) |
| 290 | { |
| 291 | symtab_smob *st_smob = (symtab_smob *) *slot; |
| 292 | |
| 293 | st_smob->symtab = NULL; |
| 294 | return 1; |
| 295 | } |
| 296 | |
| 297 | /* This function is called when an objfile is about to be freed. |
| 298 | Invalidate the symbol table as further actions on the symbol table |
| 299 | would result in bad data. All access to st_smob->symtab should be |
| 300 | gated by stscm_get_valid_symtab_smob_arg_unsafe which will raise an |
| 301 | exception on invalid symbol tables. */ |
| 302 | |
| 303 | static void |
| 304 | stscm_del_objfile_symtabs (struct objfile *objfile, void *datum) |
| 305 | { |
| 306 | htab_t htab = datum; |
| 307 | |
| 308 | if (htab != NULL) |
| 309 | { |
| 310 | htab_traverse_noresize (htab, stscm_mark_symtab_invalid, NULL); |
| 311 | htab_delete (htab); |
| 312 | } |
| 313 | } |
| 314 | \f |
| 315 | /* Symbol table methods. */ |
| 316 | |
| 317 | /* (symtab-valid? <gdb:symtab>) -> boolean |
| 318 | Returns #t if SELF still exists in GDB. */ |
| 319 | |
| 320 | static SCM |
| 321 | gdbscm_symtab_valid_p (SCM self) |
| 322 | { |
| 323 | symtab_smob *st_smob |
| 324 | = stscm_get_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 325 | |
| 326 | return scm_from_bool (stscm_is_valid (st_smob)); |
| 327 | } |
| 328 | |
| 329 | /* (symtab-filename <gdb:symtab>) -> string */ |
| 330 | |
| 331 | static SCM |
| 332 | gdbscm_symtab_filename (SCM self) |
| 333 | { |
| 334 | symtab_smob *st_smob |
| 335 | = stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 336 | struct symtab *symtab = st_smob->symtab; |
| 337 | |
| 338 | return gdbscm_scm_from_c_string (symtab_to_filename_for_display (symtab)); |
| 339 | } |
| 340 | |
| 341 | /* (symtab-fullname <gdb:symtab>) -> string */ |
| 342 | |
| 343 | static SCM |
| 344 | gdbscm_symtab_fullname (SCM self) |
| 345 | { |
| 346 | symtab_smob *st_smob |
| 347 | = stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 348 | struct symtab *symtab = st_smob->symtab; |
| 349 | |
| 350 | return gdbscm_scm_from_c_string (symtab_to_fullname (symtab)); |
| 351 | } |
| 352 | |
| 353 | /* (symtab-objfile <gdb:symtab>) -> <gdb:objfile> */ |
| 354 | |
| 355 | static SCM |
| 356 | gdbscm_symtab_objfile (SCM self) |
| 357 | { |
| 358 | symtab_smob *st_smob |
| 359 | = stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 360 | const struct symtab *symtab = st_smob->symtab; |
| 361 | |
| 362 | return ofscm_scm_from_objfile (symtab->objfile); |
| 363 | } |
| 364 | |
| 365 | /* (symtab-global-block <gdb:symtab>) -> <gdb:block> |
| 366 | Return the GLOBAL_BLOCK of the underlying symtab. */ |
| 367 | |
| 368 | static SCM |
| 369 | gdbscm_symtab_global_block (SCM self) |
| 370 | { |
| 371 | symtab_smob *st_smob |
| 372 | = stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 373 | const struct symtab *symtab = st_smob->symtab; |
| 374 | const struct blockvector *blockvector; |
| 375 | const struct block *block; |
| 376 | |
| 377 | blockvector = BLOCKVECTOR (symtab); |
| 378 | block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); |
| 379 | |
| 380 | return bkscm_scm_from_block (block, symtab->objfile); |
| 381 | } |
| 382 | |
| 383 | /* (symtab-static-block <gdb:symtab>) -> <gdb:block> |
| 384 | Return the STATIC_BLOCK of the underlying symtab. */ |
| 385 | |
| 386 | static SCM |
| 387 | gdbscm_symtab_static_block (SCM self) |
| 388 | { |
| 389 | symtab_smob *st_smob |
| 390 | = stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); |
| 391 | const struct symtab *symtab = st_smob->symtab; |
| 392 | const struct blockvector *blockvector; |
| 393 | const struct block *block; |
| 394 | |
| 395 | blockvector = BLOCKVECTOR (symtab); |
| 396 | block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK); |
| 397 | |
| 398 | return bkscm_scm_from_block (block, symtab->objfile); |
| 399 | } |
| 400 | \f |
| 401 | /* Administrivia for sal (symtab-and-line) smobs. */ |
| 402 | |
| 403 | /* The smob "mark" function for <gdb:sal>. */ |
| 404 | |
| 405 | static SCM |
| 406 | stscm_mark_sal_smob (SCM self) |
| 407 | { |
| 408 | sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (self); |
| 409 | |
| 410 | scm_gc_mark (s_smob->symtab_scm); |
| 411 | |
| 412 | /* Do this last. */ |
| 413 | return gdbscm_mark_gsmob (&s_smob->base); |
| 414 | } |
| 415 | |
| 416 | /* The smob "free" function for <gdb:sal>. */ |
| 417 | |
| 418 | static size_t |
| 419 | stscm_free_sal_smob (SCM self) |
| 420 | { |
| 421 | sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (self); |
| 422 | |
| 423 | /* Not necessary, done to catch bugs. */ |
| 424 | s_smob->symtab_scm = SCM_UNDEFINED; |
| 425 | |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | /* The smob "print" function for <gdb:sal>. */ |
| 430 | |
| 431 | static int |
| 432 | stscm_print_sal_smob (SCM self, SCM port, scm_print_state *pstate) |
| 433 | { |
| 434 | sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (self); |
| 435 | symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (s_smob->symtab_scm); |
| 436 | |
| 437 | gdbscm_printf (port, "#<%s ", symtab_smob_name); |
| 438 | scm_write (s_smob->symtab_scm, port); |
| 439 | if (s_smob->sal.line != 0) |
| 440 | gdbscm_printf (port, " line %d", s_smob->sal.line); |
| 441 | scm_puts (">", port); |
| 442 | |
| 443 | scm_remember_upto_here_1 (self); |
| 444 | |
| 445 | /* Non-zero means success. */ |
| 446 | return 1; |
| 447 | } |
| 448 | |
| 449 | /* Low level routine to create a <gdb:sal> object. */ |
| 450 | |
| 451 | static SCM |
| 452 | stscm_make_sal_smob (void) |
| 453 | { |
| 454 | sal_smob *s_smob |
| 455 | = (sal_smob *) scm_gc_malloc (sizeof (sal_smob), sal_smob_name); |
| 456 | SCM s_scm; |
| 457 | |
| 458 | s_smob->symtab_scm = SCM_BOOL_F; |
| 459 | memset (&s_smob->sal, 0, sizeof (s_smob->sal)); |
| 460 | s_scm = scm_new_smob (sal_smob_tag, (scm_t_bits) s_smob); |
| 461 | gdbscm_init_gsmob (&s_smob->base); |
| 462 | |
| 463 | return s_scm; |
| 464 | } |
| 465 | |
| 466 | /* Return non-zero if SCM is a <gdb:sal> object. */ |
| 467 | |
| 468 | static int |
| 469 | stscm_is_sal (SCM scm) |
| 470 | { |
| 471 | return SCM_SMOB_PREDICATE (sal_smob_tag, scm); |
| 472 | } |
| 473 | |
| 474 | /* (sal? object) -> boolean */ |
| 475 | |
| 476 | static SCM |
| 477 | gdbscm_sal_p (SCM scm) |
| 478 | { |
| 479 | return scm_from_bool (stscm_is_sal (scm)); |
| 480 | } |
| 481 | |
| 482 | /* Create a new <gdb:sal> object that encapsulates SAL. */ |
| 483 | |
| 484 | SCM |
| 485 | stscm_scm_from_sal (struct symtab_and_line sal) |
| 486 | { |
| 487 | SCM st_scm, s_scm; |
| 488 | sal_smob *s_smob; |
| 489 | |
| 490 | st_scm = SCM_BOOL_F; |
| 491 | if (sal.symtab != NULL) |
| 492 | st_scm = stscm_scm_from_symtab (sal.symtab); |
| 493 | |
| 494 | s_scm = stscm_make_sal_smob (); |
| 495 | s_smob = (sal_smob *) SCM_SMOB_DATA (s_scm); |
| 496 | s_smob->symtab_scm = st_scm; |
| 497 | s_smob->sal = sal; |
| 498 | |
| 499 | return s_scm; |
| 500 | } |
| 501 | |
| 502 | /* Returns the <gdb:sal> object in SELF. |
| 503 | Throws an exception if SELF is not a <gdb:sal> object. */ |
| 504 | |
| 505 | static SCM |
| 506 | stscm_get_sal_arg (SCM self, int arg_pos, const char *func_name) |
| 507 | { |
| 508 | SCM_ASSERT_TYPE (stscm_is_sal (self), self, arg_pos, func_name, |
| 509 | sal_smob_name); |
| 510 | |
| 511 | return self; |
| 512 | } |
| 513 | |
| 514 | /* Returns a pointer to the sal smob of SELF. |
| 515 | Throws an exception if SELF is not a <gdb:sal> object. */ |
| 516 | |
| 517 | static sal_smob * |
| 518 | stscm_get_sal_smob_arg (SCM self, int arg_pos, const char *func_name) |
| 519 | { |
| 520 | SCM s_scm = stscm_get_sal_arg (self, arg_pos, func_name); |
| 521 | sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (s_scm); |
| 522 | |
| 523 | return s_smob; |
| 524 | } |
| 525 | |
| 526 | /* Return non-zero if the symtab in S_SMOB is valid. */ |
| 527 | |
| 528 | static int |
| 529 | stscm_sal_is_valid (sal_smob *s_smob) |
| 530 | { |
| 531 | symtab_smob *st_smob; |
| 532 | |
| 533 | /* If there's no symtab that's ok, the sal is still valid. */ |
| 534 | if (gdbscm_is_false (s_smob->symtab_scm)) |
| 535 | return 1; |
| 536 | |
| 537 | st_smob = (symtab_smob *) SCM_SMOB_DATA (s_smob->symtab_scm); |
| 538 | |
| 539 | return st_smob->symtab != NULL; |
| 540 | } |
| 541 | |
| 542 | /* Throw a Scheme error if SELF is not a valid sal smob. |
| 543 | Otherwise return a pointer to the sal_smob object. */ |
| 544 | |
| 545 | static sal_smob * |
| 546 | stscm_get_valid_sal_smob_arg (SCM self, int arg_pos, const char *func_name) |
| 547 | { |
| 548 | sal_smob *s_smob = stscm_get_sal_smob_arg (self, arg_pos, func_name); |
| 549 | |
| 550 | if (!stscm_sal_is_valid (s_smob)) |
| 551 | { |
| 552 | gdbscm_invalid_object_error (func_name, arg_pos, self, |
| 553 | _("<gdb:sal>")); |
| 554 | } |
| 555 | |
| 556 | return s_smob; |
| 557 | } |
| 558 | \f |
| 559 | /* sal methods */ |
| 560 | |
| 561 | /* (sal-valid? <gdb:sal>) -> boolean |
| 562 | Returns #t if the symtab for SELF still exists in GDB. */ |
| 563 | |
| 564 | static SCM |
| 565 | gdbscm_sal_valid_p (SCM self) |
| 566 | { |
| 567 | sal_smob *s_smob = stscm_get_sal_smob_arg (self, SCM_ARG1, FUNC_NAME); |
| 568 | |
| 569 | return scm_from_bool (stscm_sal_is_valid (s_smob)); |
| 570 | } |
| 571 | |
| 572 | /* (sal-pc <gdb:sal>) -> address */ |
| 573 | |
| 574 | static SCM |
| 575 | gdbscm_sal_pc (SCM self) |
| 576 | { |
| 577 | sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME); |
| 578 | const struct symtab_and_line *sal = &s_smob->sal; |
| 579 | |
| 580 | return gdbscm_scm_from_ulongest (sal->pc); |
| 581 | } |
| 582 | |
| 583 | /* (sal-last <gdb:sal>) -> address |
| 584 | Returns #f if no ending address is recorded. */ |
| 585 | |
| 586 | static SCM |
| 587 | gdbscm_sal_last (SCM self) |
| 588 | { |
| 589 | sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME); |
| 590 | const struct symtab_and_line *sal = &s_smob->sal; |
| 591 | |
| 592 | if (sal->end > 0) |
| 593 | return gdbscm_scm_from_ulongest (sal->end - 1); |
| 594 | return SCM_BOOL_F; |
| 595 | } |
| 596 | |
| 597 | /* (sal-line <gdb:sal>) -> integer |
| 598 | Returns #f if no line number is recorded. */ |
| 599 | |
| 600 | static SCM |
| 601 | gdbscm_sal_line (SCM self) |
| 602 | { |
| 603 | sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME); |
| 604 | const struct symtab_and_line *sal = &s_smob->sal; |
| 605 | |
| 606 | if (sal->line > 0) |
| 607 | return scm_from_int (sal->line); |
| 608 | return SCM_BOOL_F; |
| 609 | } |
| 610 | |
| 611 | /* (sal-symtab <gdb:sal>) -> <gdb:symtab> |
| 612 | Returns #f if no symtab is recorded. */ |
| 613 | |
| 614 | static SCM |
| 615 | gdbscm_sal_symtab (SCM self) |
| 616 | { |
| 617 | sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME); |
| 618 | const struct symtab_and_line *sal = &s_smob->sal; |
| 619 | |
| 620 | return s_smob->symtab_scm; |
| 621 | } |
| 622 | |
| 623 | /* (find-pc-line address) -> <gdb:sal> */ |
| 624 | |
| 625 | static SCM |
| 626 | gdbscm_find_pc_line (SCM pc_scm) |
| 627 | { |
| 628 | ULONGEST pc_ull; |
| 629 | struct symtab_and_line sal; |
| 630 | volatile struct gdb_exception except; |
| 631 | |
| 632 | init_sal (&sal); /* -Wall */ |
| 633 | |
| 634 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "U", pc_scm, &pc_ull); |
| 635 | |
| 636 | TRY_CATCH (except, RETURN_MASK_ALL) |
| 637 | { |
| 638 | CORE_ADDR pc = (CORE_ADDR) pc_ull; |
| 639 | |
| 640 | sal = find_pc_line (pc, 0); |
| 641 | } |
| 642 | GDBSCM_HANDLE_GDB_EXCEPTION (except); |
| 643 | |
| 644 | return stscm_scm_from_sal (sal); |
| 645 | } |
| 646 | \f |
| 647 | /* Initialize the Scheme symbol support. */ |
| 648 | |
| 649 | static const scheme_function symtab_functions[] = |
| 650 | { |
| 651 | { "symtab?", 1, 0, 0, gdbscm_symtab_p, |
| 652 | "\ |
| 653 | Return #t if the object is a <gdb:symtab> object." }, |
| 654 | |
| 655 | { "symtab-valid?", 1, 0, 0, gdbscm_symtab_valid_p, |
| 656 | "\ |
| 657 | Return #t if the symtab still exists in GDB.\n\ |
| 658 | Symtabs are deleted when the corresponding objfile is freed." }, |
| 659 | |
| 660 | { "symtab-filename", 1, 0, 0, gdbscm_symtab_filename, |
| 661 | "\ |
| 662 | Return the symtab's source file name." }, |
| 663 | |
| 664 | { "symtab-fullname", 1, 0, 0, gdbscm_symtab_fullname, |
| 665 | "\ |
| 666 | Return the symtab's full source file name." }, |
| 667 | |
| 668 | { "symtab-objfile", 1, 0, 0, gdbscm_symtab_objfile, |
| 669 | "\ |
| 670 | Return the symtab's objfile." }, |
| 671 | |
| 672 | { "symtab-global-block", 1, 0, 0, gdbscm_symtab_global_block, |
| 673 | "\ |
| 674 | Return the symtab's global block." }, |
| 675 | |
| 676 | { "symtab-static-block", 1, 0, 0, gdbscm_symtab_static_block, |
| 677 | "\ |
| 678 | Return the symtab's static block." }, |
| 679 | |
| 680 | { "sal?", 1, 0, 0, gdbscm_sal_p, |
| 681 | "\ |
| 682 | Return #t if the object is a <gdb:sal> (symtab-and-line) object." }, |
| 683 | |
| 684 | { "sal-valid?", 1, 0, 0, gdbscm_sal_valid_p, |
| 685 | "\ |
| 686 | Return #t if the symtab for the sal still exists in GDB.\n\ |
| 687 | Symtabs are deleted when the corresponding objfile is freed." }, |
| 688 | |
| 689 | { "sal-symtab", 1, 0, 0, gdbscm_sal_symtab, |
| 690 | "\ |
| 691 | Return the sal's symtab." }, |
| 692 | |
| 693 | { "sal-line", 1, 0, 0, gdbscm_sal_line, |
| 694 | "\ |
| 695 | Return the sal's line number, or #f if there is none." }, |
| 696 | |
| 697 | { "sal-pc", 1, 0, 0, gdbscm_sal_pc, |
| 698 | "\ |
| 699 | Return the sal's address." }, |
| 700 | |
| 701 | { "sal-last", 1, 0, 0, gdbscm_sal_last, |
| 702 | "\ |
| 703 | Return the last address specified by the sal, or #f if there is none." }, |
| 704 | |
| 705 | { "find-pc-line", 1, 0, 0, gdbscm_find_pc_line, |
| 706 | "\ |
| 707 | Return the sal corresponding to the address, or #f if there isn't one.\n\ |
| 708 | \n\ |
| 709 | Arguments: address" }, |
| 710 | |
| 711 | END_FUNCTIONS |
| 712 | }; |
| 713 | |
| 714 | void |
| 715 | gdbscm_initialize_symtabs (void) |
| 716 | { |
| 717 | symtab_smob_tag |
| 718 | = gdbscm_make_smob_type (symtab_smob_name, sizeof (symtab_smob)); |
| 719 | scm_set_smob_mark (symtab_smob_tag, stscm_mark_symtab_smob); |
| 720 | scm_set_smob_free (symtab_smob_tag, stscm_free_symtab_smob); |
| 721 | scm_set_smob_print (symtab_smob_tag, stscm_print_symtab_smob); |
| 722 | |
| 723 | sal_smob_tag = gdbscm_make_smob_type (sal_smob_name, sizeof (sal_smob)); |
| 724 | scm_set_smob_mark (sal_smob_tag, stscm_mark_sal_smob); |
| 725 | scm_set_smob_free (sal_smob_tag, stscm_free_sal_smob); |
| 726 | scm_set_smob_print (sal_smob_tag, stscm_print_sal_smob); |
| 727 | |
| 728 | gdbscm_define_functions (symtab_functions, 1); |
| 729 | |
| 730 | /* Register an objfile "free" callback so we can properly |
| 731 | invalidate symbol tables, and symbol table and line data |
| 732 | structures when an object file that is about to be deleted. */ |
| 733 | stscm_objfile_data_key |
| 734 | = register_objfile_data_with_cleanup (NULL, stscm_del_objfile_symtabs); |
| 735 | } |