| 1 | /* Symbol table lookup for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1986-2014 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 | #include "defs.h" |
| 21 | #include "symtab.h" |
| 22 | #include "gdbtypes.h" |
| 23 | #include "gdbcore.h" |
| 24 | #include "frame.h" |
| 25 | #include "target.h" |
| 26 | #include "value.h" |
| 27 | #include "symfile.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "gdbcmd.h" |
| 30 | #include "gdb_regex.h" |
| 31 | #include "expression.h" |
| 32 | #include "language.h" |
| 33 | #include "demangle.h" |
| 34 | #include "inferior.h" |
| 35 | #include "source.h" |
| 36 | #include "filenames.h" /* for FILENAME_CMP */ |
| 37 | #include "objc-lang.h" |
| 38 | #include "d-lang.h" |
| 39 | #include "ada-lang.h" |
| 40 | #include "go-lang.h" |
| 41 | #include "p-lang.h" |
| 42 | #include "addrmap.h" |
| 43 | #include "cli/cli-utils.h" |
| 44 | |
| 45 | #include "hashtab.h" |
| 46 | |
| 47 | #include "gdb_obstack.h" |
| 48 | #include "block.h" |
| 49 | #include "dictionary.h" |
| 50 | |
| 51 | #include <sys/types.h> |
| 52 | #include <fcntl.h> |
| 53 | #include <string.h> |
| 54 | #include <sys/stat.h> |
| 55 | #include <ctype.h> |
| 56 | #include "cp-abi.h" |
| 57 | #include "cp-support.h" |
| 58 | #include "observer.h" |
| 59 | #include "gdb_assert.h" |
| 60 | #include "solist.h" |
| 61 | #include "macrotab.h" |
| 62 | #include "macroscope.h" |
| 63 | |
| 64 | #include "parser-defs.h" |
| 65 | |
| 66 | /* Prototypes for local functions */ |
| 67 | |
| 68 | static void rbreak_command (char *, int); |
| 69 | |
| 70 | static void types_info (char *, int); |
| 71 | |
| 72 | static void functions_info (char *, int); |
| 73 | |
| 74 | static void variables_info (char *, int); |
| 75 | |
| 76 | static void sources_info (char *, int); |
| 77 | |
| 78 | static int find_line_common (struct linetable *, int, int *, int); |
| 79 | |
| 80 | static struct symbol *lookup_symbol_aux (const char *name, |
| 81 | const struct block *block, |
| 82 | const domain_enum domain, |
| 83 | enum language language, |
| 84 | struct field_of_this_result *is_a_field_of_this); |
| 85 | |
| 86 | static |
| 87 | struct symbol *lookup_symbol_aux_local (const char *name, |
| 88 | const struct block *block, |
| 89 | const domain_enum domain, |
| 90 | enum language language); |
| 91 | |
| 92 | static |
| 93 | struct symbol *lookup_symbol_aux_symtabs (int block_index, |
| 94 | const char *name, |
| 95 | const domain_enum domain); |
| 96 | |
| 97 | static |
| 98 | struct symbol *lookup_symbol_aux_quick (struct objfile *objfile, |
| 99 | int block_index, |
| 100 | const char *name, |
| 101 | const domain_enum domain); |
| 102 | |
| 103 | void _initialize_symtab (void); |
| 104 | |
| 105 | /* */ |
| 106 | |
| 107 | /* Program space key for finding name and language of "main". */ |
| 108 | |
| 109 | static const struct program_space_data *main_progspace_key; |
| 110 | |
| 111 | /* Type of the data stored on the program space. */ |
| 112 | |
| 113 | struct main_info |
| 114 | { |
| 115 | /* Name of "main". */ |
| 116 | |
| 117 | char *name_of_main; |
| 118 | |
| 119 | /* Language of "main". */ |
| 120 | |
| 121 | enum language language_of_main; |
| 122 | }; |
| 123 | |
| 124 | /* When non-zero, print debugging messages related to symtab creation. */ |
| 125 | unsigned int symtab_create_debug = 0; |
| 126 | |
| 127 | /* Non-zero if a file may be known by two different basenames. |
| 128 | This is the uncommon case, and significantly slows down gdb. |
| 129 | Default set to "off" to not slow down the common case. */ |
| 130 | int basenames_may_differ = 0; |
| 131 | |
| 132 | /* Allow the user to configure the debugger behavior with respect |
| 133 | to multiple-choice menus when more than one symbol matches during |
| 134 | a symbol lookup. */ |
| 135 | |
| 136 | const char multiple_symbols_ask[] = "ask"; |
| 137 | const char multiple_symbols_all[] = "all"; |
| 138 | const char multiple_symbols_cancel[] = "cancel"; |
| 139 | static const char *const multiple_symbols_modes[] = |
| 140 | { |
| 141 | multiple_symbols_ask, |
| 142 | multiple_symbols_all, |
| 143 | multiple_symbols_cancel, |
| 144 | NULL |
| 145 | }; |
| 146 | static const char *multiple_symbols_mode = multiple_symbols_all; |
| 147 | |
| 148 | /* Read-only accessor to AUTO_SELECT_MODE. */ |
| 149 | |
| 150 | const char * |
| 151 | multiple_symbols_select_mode (void) |
| 152 | { |
| 153 | return multiple_symbols_mode; |
| 154 | } |
| 155 | |
| 156 | /* Block in which the most recently searched-for symbol was found. |
| 157 | Might be better to make this a parameter to lookup_symbol and |
| 158 | value_of_this. */ |
| 159 | |
| 160 | const struct block *block_found; |
| 161 | |
| 162 | /* Return the name of a domain_enum. */ |
| 163 | |
| 164 | const char * |
| 165 | domain_name (domain_enum e) |
| 166 | { |
| 167 | switch (e) |
| 168 | { |
| 169 | case UNDEF_DOMAIN: return "UNDEF_DOMAIN"; |
| 170 | case VAR_DOMAIN: return "VAR_DOMAIN"; |
| 171 | case STRUCT_DOMAIN: return "STRUCT_DOMAIN"; |
| 172 | case LABEL_DOMAIN: return "LABEL_DOMAIN"; |
| 173 | case COMMON_BLOCK_DOMAIN: return "COMMON_BLOCK_DOMAIN"; |
| 174 | default: gdb_assert_not_reached ("bad domain_enum"); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* Return the name of a search_domain . */ |
| 179 | |
| 180 | const char * |
| 181 | search_domain_name (enum search_domain e) |
| 182 | { |
| 183 | switch (e) |
| 184 | { |
| 185 | case VARIABLES_DOMAIN: return "VARIABLES_DOMAIN"; |
| 186 | case FUNCTIONS_DOMAIN: return "FUNCTIONS_DOMAIN"; |
| 187 | case TYPES_DOMAIN: return "TYPES_DOMAIN"; |
| 188 | case ALL_DOMAIN: return "ALL_DOMAIN"; |
| 189 | default: gdb_assert_not_reached ("bad search_domain"); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | /* Set the primary field in SYMTAB. */ |
| 194 | |
| 195 | void |
| 196 | set_symtab_primary (struct symtab *symtab, int primary) |
| 197 | { |
| 198 | symtab->primary = primary; |
| 199 | |
| 200 | if (symtab_create_debug && primary) |
| 201 | { |
| 202 | fprintf_unfiltered (gdb_stdlog, |
| 203 | "Created primary symtab %s for %s.\n", |
| 204 | host_address_to_string (symtab), |
| 205 | symtab_to_filename_for_display (symtab)); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /* See whether FILENAME matches SEARCH_NAME using the rule that we |
| 210 | advertise to the user. (The manual's description of linespecs |
| 211 | describes what we advertise). Returns true if they match, false |
| 212 | otherwise. */ |
| 213 | |
| 214 | int |
| 215 | compare_filenames_for_search (const char *filename, const char *search_name) |
| 216 | { |
| 217 | int len = strlen (filename); |
| 218 | size_t search_len = strlen (search_name); |
| 219 | |
| 220 | if (len < search_len) |
| 221 | return 0; |
| 222 | |
| 223 | /* The tail of FILENAME must match. */ |
| 224 | if (FILENAME_CMP (filename + len - search_len, search_name) != 0) |
| 225 | return 0; |
| 226 | |
| 227 | /* Either the names must completely match, or the character |
| 228 | preceding the trailing SEARCH_NAME segment of FILENAME must be a |
| 229 | directory separator. |
| 230 | |
| 231 | The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c" |
| 232 | cannot match FILENAME "/path//dir/file.c" - as user has requested |
| 233 | absolute path. The sama applies for "c:\file.c" possibly |
| 234 | incorrectly hypothetically matching "d:\dir\c:\file.c". |
| 235 | |
| 236 | The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c" |
| 237 | compatible with SEARCH_NAME "file.c". In such case a compiler had |
| 238 | to put the "c:file.c" name into debug info. Such compatibility |
| 239 | works only on GDB built for DOS host. */ |
| 240 | return (len == search_len |
| 241 | || (!IS_ABSOLUTE_PATH (search_name) |
| 242 | && IS_DIR_SEPARATOR (filename[len - search_len - 1])) |
| 243 | || (HAS_DRIVE_SPEC (filename) |
| 244 | && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len])); |
| 245 | } |
| 246 | |
| 247 | /* Check for a symtab of a specific name by searching some symtabs. |
| 248 | This is a helper function for callbacks of iterate_over_symtabs. |
| 249 | |
| 250 | If NAME is not absolute, then REAL_PATH is NULL |
| 251 | If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME. |
| 252 | |
| 253 | The return value, NAME, REAL_PATH, CALLBACK, and DATA |
| 254 | are identical to the `map_symtabs_matching_filename' method of |
| 255 | quick_symbol_functions. |
| 256 | |
| 257 | FIRST and AFTER_LAST indicate the range of symtabs to search. |
| 258 | AFTER_LAST is one past the last symtab to search; NULL means to |
| 259 | search until the end of the list. */ |
| 260 | |
| 261 | int |
| 262 | iterate_over_some_symtabs (const char *name, |
| 263 | const char *real_path, |
| 264 | int (*callback) (struct symtab *symtab, |
| 265 | void *data), |
| 266 | void *data, |
| 267 | struct symtab *first, |
| 268 | struct symtab *after_last) |
| 269 | { |
| 270 | struct symtab *s = NULL; |
| 271 | const char* base_name = lbasename (name); |
| 272 | |
| 273 | for (s = first; s != NULL && s != after_last; s = s->next) |
| 274 | { |
| 275 | if (compare_filenames_for_search (s->filename, name)) |
| 276 | { |
| 277 | if (callback (s, data)) |
| 278 | return 1; |
| 279 | continue; |
| 280 | } |
| 281 | |
| 282 | /* Before we invoke realpath, which can get expensive when many |
| 283 | files are involved, do a quick comparison of the basenames. */ |
| 284 | if (! basenames_may_differ |
| 285 | && FILENAME_CMP (base_name, lbasename (s->filename)) != 0) |
| 286 | continue; |
| 287 | |
| 288 | if (compare_filenames_for_search (symtab_to_fullname (s), name)) |
| 289 | { |
| 290 | if (callback (s, data)) |
| 291 | return 1; |
| 292 | continue; |
| 293 | } |
| 294 | |
| 295 | /* If the user gave us an absolute path, try to find the file in |
| 296 | this symtab and use its absolute path. */ |
| 297 | if (real_path != NULL) |
| 298 | { |
| 299 | const char *fullname = symtab_to_fullname (s); |
| 300 | |
| 301 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
| 302 | gdb_assert (IS_ABSOLUTE_PATH (name)); |
| 303 | if (FILENAME_CMP (real_path, fullname) == 0) |
| 304 | { |
| 305 | if (callback (s, data)) |
| 306 | return 1; |
| 307 | continue; |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | /* Check for a symtab of a specific name; first in symtabs, then in |
| 316 | psymtabs. *If* there is no '/' in the name, a match after a '/' |
| 317 | in the symtab filename will also work. |
| 318 | |
| 319 | Calls CALLBACK with each symtab that is found and with the supplied |
| 320 | DATA. If CALLBACK returns true, the search stops. */ |
| 321 | |
| 322 | void |
| 323 | iterate_over_symtabs (const char *name, |
| 324 | int (*callback) (struct symtab *symtab, |
| 325 | void *data), |
| 326 | void *data) |
| 327 | { |
| 328 | struct objfile *objfile; |
| 329 | char *real_path = NULL; |
| 330 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 331 | |
| 332 | /* Here we are interested in canonicalizing an absolute path, not |
| 333 | absolutizing a relative path. */ |
| 334 | if (IS_ABSOLUTE_PATH (name)) |
| 335 | { |
| 336 | real_path = gdb_realpath (name); |
| 337 | make_cleanup (xfree, real_path); |
| 338 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
| 339 | } |
| 340 | |
| 341 | ALL_OBJFILES (objfile) |
| 342 | { |
| 343 | if (iterate_over_some_symtabs (name, real_path, callback, data, |
| 344 | objfile->symtabs, NULL)) |
| 345 | { |
| 346 | do_cleanups (cleanups); |
| 347 | return; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /* Same search rules as above apply here, but now we look thru the |
| 352 | psymtabs. */ |
| 353 | |
| 354 | ALL_OBJFILES (objfile) |
| 355 | { |
| 356 | if (objfile->sf |
| 357 | && objfile->sf->qf->map_symtabs_matching_filename (objfile, |
| 358 | name, |
| 359 | real_path, |
| 360 | callback, |
| 361 | data)) |
| 362 | { |
| 363 | do_cleanups (cleanups); |
| 364 | return; |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | do_cleanups (cleanups); |
| 369 | } |
| 370 | |
| 371 | /* The callback function used by lookup_symtab. */ |
| 372 | |
| 373 | static int |
| 374 | lookup_symtab_callback (struct symtab *symtab, void *data) |
| 375 | { |
| 376 | struct symtab **result_ptr = data; |
| 377 | |
| 378 | *result_ptr = symtab; |
| 379 | return 1; |
| 380 | } |
| 381 | |
| 382 | /* A wrapper for iterate_over_symtabs that returns the first matching |
| 383 | symtab, or NULL. */ |
| 384 | |
| 385 | struct symtab * |
| 386 | lookup_symtab (const char *name) |
| 387 | { |
| 388 | struct symtab *result = NULL; |
| 389 | |
| 390 | iterate_over_symtabs (name, lookup_symtab_callback, &result); |
| 391 | return result; |
| 392 | } |
| 393 | |
| 394 | \f |
| 395 | /* Mangle a GDB method stub type. This actually reassembles the pieces of the |
| 396 | full method name, which consist of the class name (from T), the unadorned |
| 397 | method name from METHOD_ID, and the signature for the specific overload, |
| 398 | specified by SIGNATURE_ID. Note that this function is g++ specific. */ |
| 399 | |
| 400 | char * |
| 401 | gdb_mangle_name (struct type *type, int method_id, int signature_id) |
| 402 | { |
| 403 | int mangled_name_len; |
| 404 | char *mangled_name; |
| 405 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id); |
| 406 | struct fn_field *method = &f[signature_id]; |
| 407 | const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id); |
| 408 | const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id); |
| 409 | const char *newname = type_name_no_tag (type); |
| 410 | |
| 411 | /* Does the form of physname indicate that it is the full mangled name |
| 412 | of a constructor (not just the args)? */ |
| 413 | int is_full_physname_constructor; |
| 414 | |
| 415 | int is_constructor; |
| 416 | int is_destructor = is_destructor_name (physname); |
| 417 | /* Need a new type prefix. */ |
| 418 | char *const_prefix = method->is_const ? "C" : ""; |
| 419 | char *volatile_prefix = method->is_volatile ? "V" : ""; |
| 420 | char buf[20]; |
| 421 | int len = (newname == NULL ? 0 : strlen (newname)); |
| 422 | |
| 423 | /* Nothing to do if physname already contains a fully mangled v3 abi name |
| 424 | or an operator name. */ |
| 425 | if ((physname[0] == '_' && physname[1] == 'Z') |
| 426 | || is_operator_name (field_name)) |
| 427 | return xstrdup (physname); |
| 428 | |
| 429 | is_full_physname_constructor = is_constructor_name (physname); |
| 430 | |
| 431 | is_constructor = is_full_physname_constructor |
| 432 | || (newname && strcmp (field_name, newname) == 0); |
| 433 | |
| 434 | if (!is_destructor) |
| 435 | is_destructor = (strncmp (physname, "__dt", 4) == 0); |
| 436 | |
| 437 | if (is_destructor || is_full_physname_constructor) |
| 438 | { |
| 439 | mangled_name = (char *) xmalloc (strlen (physname) + 1); |
| 440 | strcpy (mangled_name, physname); |
| 441 | return mangled_name; |
| 442 | } |
| 443 | |
| 444 | if (len == 0) |
| 445 | { |
| 446 | xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix); |
| 447 | } |
| 448 | else if (physname[0] == 't' || physname[0] == 'Q') |
| 449 | { |
| 450 | /* The physname for template and qualified methods already includes |
| 451 | the class name. */ |
| 452 | xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix); |
| 453 | newname = NULL; |
| 454 | len = 0; |
| 455 | } |
| 456 | else |
| 457 | { |
| 458 | xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix, |
| 459 | volatile_prefix, len); |
| 460 | } |
| 461 | mangled_name_len = ((is_constructor ? 0 : strlen (field_name)) |
| 462 | + strlen (buf) + len + strlen (physname) + 1); |
| 463 | |
| 464 | mangled_name = (char *) xmalloc (mangled_name_len); |
| 465 | if (is_constructor) |
| 466 | mangled_name[0] = '\0'; |
| 467 | else |
| 468 | strcpy (mangled_name, field_name); |
| 469 | |
| 470 | strcat (mangled_name, buf); |
| 471 | /* If the class doesn't have a name, i.e. newname NULL, then we just |
| 472 | mangle it using 0 for the length of the class. Thus it gets mangled |
| 473 | as something starting with `::' rather than `classname::'. */ |
| 474 | if (newname != NULL) |
| 475 | strcat (mangled_name, newname); |
| 476 | |
| 477 | strcat (mangled_name, physname); |
| 478 | return (mangled_name); |
| 479 | } |
| 480 | |
| 481 | /* Initialize the cplus_specific structure. 'cplus_specific' should |
| 482 | only be allocated for use with cplus symbols. */ |
| 483 | |
| 484 | static void |
| 485 | symbol_init_cplus_specific (struct general_symbol_info *gsymbol, |
| 486 | struct obstack *obstack) |
| 487 | { |
| 488 | /* A language_specific structure should not have been previously |
| 489 | initialized. */ |
| 490 | gdb_assert (gsymbol->language_specific.cplus_specific == NULL); |
| 491 | gdb_assert (obstack != NULL); |
| 492 | |
| 493 | gsymbol->language_specific.cplus_specific = |
| 494 | OBSTACK_ZALLOC (obstack, struct cplus_specific); |
| 495 | } |
| 496 | |
| 497 | /* Set the demangled name of GSYMBOL to NAME. NAME must be already |
| 498 | correctly allocated. For C++ symbols a cplus_specific struct is |
| 499 | allocated so OBJFILE must not be NULL. If this is a non C++ symbol |
| 500 | OBJFILE can be NULL. */ |
| 501 | |
| 502 | void |
| 503 | symbol_set_demangled_name (struct general_symbol_info *gsymbol, |
| 504 | const char *name, |
| 505 | struct obstack *obstack) |
| 506 | { |
| 507 | if (gsymbol->language == language_cplus) |
| 508 | { |
| 509 | if (gsymbol->language_specific.cplus_specific == NULL) |
| 510 | symbol_init_cplus_specific (gsymbol, obstack); |
| 511 | |
| 512 | gsymbol->language_specific.cplus_specific->demangled_name = name; |
| 513 | } |
| 514 | else if (gsymbol->language == language_ada) |
| 515 | { |
| 516 | if (name == NULL) |
| 517 | { |
| 518 | gsymbol->ada_mangled = 0; |
| 519 | gsymbol->language_specific.obstack = obstack; |
| 520 | } |
| 521 | else |
| 522 | { |
| 523 | gsymbol->ada_mangled = 1; |
| 524 | gsymbol->language_specific.mangled_lang.demangled_name = name; |
| 525 | } |
| 526 | } |
| 527 | else |
| 528 | gsymbol->language_specific.mangled_lang.demangled_name = name; |
| 529 | } |
| 530 | |
| 531 | /* Return the demangled name of GSYMBOL. */ |
| 532 | |
| 533 | const char * |
| 534 | symbol_get_demangled_name (const struct general_symbol_info *gsymbol) |
| 535 | { |
| 536 | if (gsymbol->language == language_cplus) |
| 537 | { |
| 538 | if (gsymbol->language_specific.cplus_specific != NULL) |
| 539 | return gsymbol->language_specific.cplus_specific->demangled_name; |
| 540 | else |
| 541 | return NULL; |
| 542 | } |
| 543 | else if (gsymbol->language == language_ada) |
| 544 | { |
| 545 | if (!gsymbol->ada_mangled) |
| 546 | return NULL; |
| 547 | /* Fall through. */ |
| 548 | } |
| 549 | |
| 550 | return gsymbol->language_specific.mangled_lang.demangled_name; |
| 551 | } |
| 552 | |
| 553 | \f |
| 554 | /* Initialize the language dependent portion of a symbol |
| 555 | depending upon the language for the symbol. */ |
| 556 | |
| 557 | void |
| 558 | symbol_set_language (struct general_symbol_info *gsymbol, |
| 559 | enum language language, |
| 560 | struct obstack *obstack) |
| 561 | { |
| 562 | gsymbol->language = language; |
| 563 | if (gsymbol->language == language_d |
| 564 | || gsymbol->language == language_go |
| 565 | || gsymbol->language == language_java |
| 566 | || gsymbol->language == language_objc |
| 567 | || gsymbol->language == language_fortran) |
| 568 | { |
| 569 | symbol_set_demangled_name (gsymbol, NULL, obstack); |
| 570 | } |
| 571 | else if (gsymbol->language == language_ada) |
| 572 | { |
| 573 | gdb_assert (gsymbol->ada_mangled == 0); |
| 574 | gsymbol->language_specific.obstack = obstack; |
| 575 | } |
| 576 | else if (gsymbol->language == language_cplus) |
| 577 | gsymbol->language_specific.cplus_specific = NULL; |
| 578 | else |
| 579 | { |
| 580 | memset (&gsymbol->language_specific, 0, |
| 581 | sizeof (gsymbol->language_specific)); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /* Functions to initialize a symbol's mangled name. */ |
| 586 | |
| 587 | /* Objects of this type are stored in the demangled name hash table. */ |
| 588 | struct demangled_name_entry |
| 589 | { |
| 590 | const char *mangled; |
| 591 | char demangled[1]; |
| 592 | }; |
| 593 | |
| 594 | /* Hash function for the demangled name hash. */ |
| 595 | |
| 596 | static hashval_t |
| 597 | hash_demangled_name_entry (const void *data) |
| 598 | { |
| 599 | const struct demangled_name_entry *e = data; |
| 600 | |
| 601 | return htab_hash_string (e->mangled); |
| 602 | } |
| 603 | |
| 604 | /* Equality function for the demangled name hash. */ |
| 605 | |
| 606 | static int |
| 607 | eq_demangled_name_entry (const void *a, const void *b) |
| 608 | { |
| 609 | const struct demangled_name_entry *da = a; |
| 610 | const struct demangled_name_entry *db = b; |
| 611 | |
| 612 | return strcmp (da->mangled, db->mangled) == 0; |
| 613 | } |
| 614 | |
| 615 | /* Create the hash table used for demangled names. Each hash entry is |
| 616 | a pair of strings; one for the mangled name and one for the demangled |
| 617 | name. The entry is hashed via just the mangled name. */ |
| 618 | |
| 619 | static void |
| 620 | create_demangled_names_hash (struct objfile *objfile) |
| 621 | { |
| 622 | /* Choose 256 as the starting size of the hash table, somewhat arbitrarily. |
| 623 | The hash table code will round this up to the next prime number. |
| 624 | Choosing a much larger table size wastes memory, and saves only about |
| 625 | 1% in symbol reading. */ |
| 626 | |
| 627 | objfile->per_bfd->demangled_names_hash = htab_create_alloc |
| 628 | (256, hash_demangled_name_entry, eq_demangled_name_entry, |
| 629 | NULL, xcalloc, xfree); |
| 630 | } |
| 631 | |
| 632 | /* Try to determine the demangled name for a symbol, based on the |
| 633 | language of that symbol. If the language is set to language_auto, |
| 634 | it will attempt to find any demangling algorithm that works and |
| 635 | then set the language appropriately. The returned name is allocated |
| 636 | by the demangler and should be xfree'd. */ |
| 637 | |
| 638 | static char * |
| 639 | symbol_find_demangled_name (struct general_symbol_info *gsymbol, |
| 640 | const char *mangled) |
| 641 | { |
| 642 | char *demangled = NULL; |
| 643 | |
| 644 | if (gsymbol->language == language_unknown) |
| 645 | gsymbol->language = language_auto; |
| 646 | |
| 647 | if (gsymbol->language == language_objc |
| 648 | || gsymbol->language == language_auto) |
| 649 | { |
| 650 | demangled = |
| 651 | objc_demangle (mangled, 0); |
| 652 | if (demangled != NULL) |
| 653 | { |
| 654 | gsymbol->language = language_objc; |
| 655 | return demangled; |
| 656 | } |
| 657 | } |
| 658 | if (gsymbol->language == language_cplus |
| 659 | || gsymbol->language == language_auto) |
| 660 | { |
| 661 | demangled = |
| 662 | gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); |
| 663 | if (demangled != NULL) |
| 664 | { |
| 665 | gsymbol->language = language_cplus; |
| 666 | return demangled; |
| 667 | } |
| 668 | } |
| 669 | if (gsymbol->language == language_java) |
| 670 | { |
| 671 | demangled = |
| 672 | gdb_demangle (mangled, |
| 673 | DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA); |
| 674 | if (demangled != NULL) |
| 675 | { |
| 676 | gsymbol->language = language_java; |
| 677 | return demangled; |
| 678 | } |
| 679 | } |
| 680 | if (gsymbol->language == language_d |
| 681 | || gsymbol->language == language_auto) |
| 682 | { |
| 683 | demangled = d_demangle(mangled, 0); |
| 684 | if (demangled != NULL) |
| 685 | { |
| 686 | gsymbol->language = language_d; |
| 687 | return demangled; |
| 688 | } |
| 689 | } |
| 690 | /* FIXME(dje): Continually adding languages here is clumsy. |
| 691 | Better to just call la_demangle if !auto, and if auto then call |
| 692 | a utility routine that tries successive languages in turn and reports |
| 693 | which one it finds. I realize the la_demangle options may be different |
| 694 | for different languages but there's already a FIXME for that. */ |
| 695 | if (gsymbol->language == language_go |
| 696 | || gsymbol->language == language_auto) |
| 697 | { |
| 698 | demangled = go_demangle (mangled, 0); |
| 699 | if (demangled != NULL) |
| 700 | { |
| 701 | gsymbol->language = language_go; |
| 702 | return demangled; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | /* We could support `gsymbol->language == language_fortran' here to provide |
| 707 | module namespaces also for inferiors with only minimal symbol table (ELF |
| 708 | symbols). Just the mangling standard is not standardized across compilers |
| 709 | and there is no DW_AT_producer available for inferiors with only the ELF |
| 710 | symbols to check the mangling kind. */ |
| 711 | |
| 712 | /* Check for Ada symbols last. See comment below explaining why. */ |
| 713 | |
| 714 | if (gsymbol->language == language_auto) |
| 715 | { |
| 716 | const char *demangled = ada_decode (mangled); |
| 717 | |
| 718 | if (demangled != mangled && demangled != NULL && demangled[0] != '<') |
| 719 | { |
| 720 | /* Set the gsymbol language to Ada, but still return NULL. |
| 721 | Two reasons for that: |
| 722 | |
| 723 | 1. For Ada, we prefer computing the symbol's decoded name |
| 724 | on the fly rather than pre-compute it, in order to save |
| 725 | memory (Ada projects are typically very large). |
| 726 | |
| 727 | 2. There are some areas in the definition of the GNAT |
| 728 | encoding where, with a bit of bad luck, we might be able |
| 729 | to decode a non-Ada symbol, generating an incorrect |
| 730 | demangled name (Eg: names ending with "TB" for instance |
| 731 | are identified as task bodies and so stripped from |
| 732 | the decoded name returned). |
| 733 | |
| 734 | Returning NULL, here, helps us get a little bit of |
| 735 | the best of both worlds. Because we're last, we should |
| 736 | not affect any of the other languages that were able to |
| 737 | demangle the symbol before us; we get to correctly tag |
| 738 | Ada symbols as such; and even if we incorrectly tagged |
| 739 | a non-Ada symbol, which should be rare, any routing |
| 740 | through the Ada language should be transparent (Ada |
| 741 | tries to behave much like C/C++ with non-Ada symbols). */ |
| 742 | gsymbol->language = language_ada; |
| 743 | return NULL; |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | return NULL; |
| 748 | } |
| 749 | |
| 750 | /* Set both the mangled and demangled (if any) names for GSYMBOL based |
| 751 | on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the |
| 752 | objfile's obstack; but if COPY_NAME is 0 and if NAME is |
| 753 | NUL-terminated, then this function assumes that NAME is already |
| 754 | correctly saved (either permanently or with a lifetime tied to the |
| 755 | objfile), and it will not be copied. |
| 756 | |
| 757 | The hash table corresponding to OBJFILE is used, and the memory |
| 758 | comes from the per-BFD storage_obstack. LINKAGE_NAME is copied, |
| 759 | so the pointer can be discarded after calling this function. */ |
| 760 | |
| 761 | /* We have to be careful when dealing with Java names: when we run |
| 762 | into a Java minimal symbol, we don't know it's a Java symbol, so it |
| 763 | gets demangled as a C++ name. This is unfortunate, but there's not |
| 764 | much we can do about it: but when demangling partial symbols and |
| 765 | regular symbols, we'd better not reuse the wrong demangled name. |
| 766 | (See PR gdb/1039.) We solve this by putting a distinctive prefix |
| 767 | on Java names when storing them in the hash table. */ |
| 768 | |
| 769 | /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I |
| 770 | don't mind the Java prefix so much: different languages have |
| 771 | different demangling requirements, so it's only natural that we |
| 772 | need to keep language data around in our demangling cache. But |
| 773 | it's not good that the minimal symbol has the wrong demangled name. |
| 774 | Unfortunately, I can't think of any easy solution to that |
| 775 | problem. */ |
| 776 | |
| 777 | #define JAVA_PREFIX "##JAVA$$" |
| 778 | #define JAVA_PREFIX_LEN 8 |
| 779 | |
| 780 | void |
| 781 | symbol_set_names (struct general_symbol_info *gsymbol, |
| 782 | const char *linkage_name, int len, int copy_name, |
| 783 | struct objfile *objfile) |
| 784 | { |
| 785 | struct demangled_name_entry **slot; |
| 786 | /* A 0-terminated copy of the linkage name. */ |
| 787 | const char *linkage_name_copy; |
| 788 | /* A copy of the linkage name that might have a special Java prefix |
| 789 | added to it, for use when looking names up in the hash table. */ |
| 790 | const char *lookup_name; |
| 791 | /* The length of lookup_name. */ |
| 792 | int lookup_len; |
| 793 | struct demangled_name_entry entry; |
| 794 | struct objfile_per_bfd_storage *per_bfd = objfile->per_bfd; |
| 795 | |
| 796 | if (gsymbol->language == language_ada) |
| 797 | { |
| 798 | /* In Ada, we do the symbol lookups using the mangled name, so |
| 799 | we can save some space by not storing the demangled name. |
| 800 | |
| 801 | As a side note, we have also observed some overlap between |
| 802 | the C++ mangling and Ada mangling, similarly to what has |
| 803 | been observed with Java. Because we don't store the demangled |
| 804 | name with the symbol, we don't need to use the same trick |
| 805 | as Java. */ |
| 806 | if (!copy_name) |
| 807 | gsymbol->name = linkage_name; |
| 808 | else |
| 809 | { |
| 810 | char *name = obstack_alloc (&per_bfd->storage_obstack, len + 1); |
| 811 | |
| 812 | memcpy (name, linkage_name, len); |
| 813 | name[len] = '\0'; |
| 814 | gsymbol->name = name; |
| 815 | } |
| 816 | symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack); |
| 817 | |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | if (per_bfd->demangled_names_hash == NULL) |
| 822 | create_demangled_names_hash (objfile); |
| 823 | |
| 824 | /* The stabs reader generally provides names that are not |
| 825 | NUL-terminated; most of the other readers don't do this, so we |
| 826 | can just use the given copy, unless we're in the Java case. */ |
| 827 | if (gsymbol->language == language_java) |
| 828 | { |
| 829 | char *alloc_name; |
| 830 | |
| 831 | lookup_len = len + JAVA_PREFIX_LEN; |
| 832 | alloc_name = alloca (lookup_len + 1); |
| 833 | memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN); |
| 834 | memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len); |
| 835 | alloc_name[lookup_len] = '\0'; |
| 836 | |
| 837 | lookup_name = alloc_name; |
| 838 | linkage_name_copy = alloc_name + JAVA_PREFIX_LEN; |
| 839 | } |
| 840 | else if (linkage_name[len] != '\0') |
| 841 | { |
| 842 | char *alloc_name; |
| 843 | |
| 844 | lookup_len = len; |
| 845 | alloc_name = alloca (lookup_len + 1); |
| 846 | memcpy (alloc_name, linkage_name, len); |
| 847 | alloc_name[lookup_len] = '\0'; |
| 848 | |
| 849 | lookup_name = alloc_name; |
| 850 | linkage_name_copy = alloc_name; |
| 851 | } |
| 852 | else |
| 853 | { |
| 854 | lookup_len = len; |
| 855 | lookup_name = linkage_name; |
| 856 | linkage_name_copy = linkage_name; |
| 857 | } |
| 858 | |
| 859 | entry.mangled = lookup_name; |
| 860 | slot = ((struct demangled_name_entry **) |
| 861 | htab_find_slot (per_bfd->demangled_names_hash, |
| 862 | &entry, INSERT)); |
| 863 | |
| 864 | /* If this name is not in the hash table, add it. */ |
| 865 | if (*slot == NULL |
| 866 | /* A C version of the symbol may have already snuck into the table. |
| 867 | This happens to, e.g., main.init (__go_init_main). Cope. */ |
| 868 | || (gsymbol->language == language_go |
| 869 | && (*slot)->demangled[0] == '\0')) |
| 870 | { |
| 871 | char *demangled_name = symbol_find_demangled_name (gsymbol, |
| 872 | linkage_name_copy); |
| 873 | int demangled_len = demangled_name ? strlen (demangled_name) : 0; |
| 874 | |
| 875 | /* Suppose we have demangled_name==NULL, copy_name==0, and |
| 876 | lookup_name==linkage_name. In this case, we already have the |
| 877 | mangled name saved, and we don't have a demangled name. So, |
| 878 | you might think we could save a little space by not recording |
| 879 | this in the hash table at all. |
| 880 | |
| 881 | It turns out that it is actually important to still save such |
| 882 | an entry in the hash table, because storing this name gives |
| 883 | us better bcache hit rates for partial symbols. */ |
| 884 | if (!copy_name && lookup_name == linkage_name) |
| 885 | { |
| 886 | *slot = obstack_alloc (&per_bfd->storage_obstack, |
| 887 | offsetof (struct demangled_name_entry, |
| 888 | demangled) |
| 889 | + demangled_len + 1); |
| 890 | (*slot)->mangled = lookup_name; |
| 891 | } |
| 892 | else |
| 893 | { |
| 894 | char *mangled_ptr; |
| 895 | |
| 896 | /* If we must copy the mangled name, put it directly after |
| 897 | the demangled name so we can have a single |
| 898 | allocation. */ |
| 899 | *slot = obstack_alloc (&per_bfd->storage_obstack, |
| 900 | offsetof (struct demangled_name_entry, |
| 901 | demangled) |
| 902 | + lookup_len + demangled_len + 2); |
| 903 | mangled_ptr = &((*slot)->demangled[demangled_len + 1]); |
| 904 | strcpy (mangled_ptr, lookup_name); |
| 905 | (*slot)->mangled = mangled_ptr; |
| 906 | } |
| 907 | |
| 908 | if (demangled_name != NULL) |
| 909 | { |
| 910 | strcpy ((*slot)->demangled, demangled_name); |
| 911 | xfree (demangled_name); |
| 912 | } |
| 913 | else |
| 914 | (*slot)->demangled[0] = '\0'; |
| 915 | } |
| 916 | |
| 917 | gsymbol->name = (*slot)->mangled + lookup_len - len; |
| 918 | if ((*slot)->demangled[0] != '\0') |
| 919 | symbol_set_demangled_name (gsymbol, (*slot)->demangled, |
| 920 | &per_bfd->storage_obstack); |
| 921 | else |
| 922 | symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack); |
| 923 | } |
| 924 | |
| 925 | /* Return the source code name of a symbol. In languages where |
| 926 | demangling is necessary, this is the demangled name. */ |
| 927 | |
| 928 | const char * |
| 929 | symbol_natural_name (const struct general_symbol_info *gsymbol) |
| 930 | { |
| 931 | switch (gsymbol->language) |
| 932 | { |
| 933 | case language_cplus: |
| 934 | case language_d: |
| 935 | case language_go: |
| 936 | case language_java: |
| 937 | case language_objc: |
| 938 | case language_fortran: |
| 939 | if (symbol_get_demangled_name (gsymbol) != NULL) |
| 940 | return symbol_get_demangled_name (gsymbol); |
| 941 | break; |
| 942 | case language_ada: |
| 943 | return ada_decode_symbol (gsymbol); |
| 944 | default: |
| 945 | break; |
| 946 | } |
| 947 | return gsymbol->name; |
| 948 | } |
| 949 | |
| 950 | /* Return the demangled name for a symbol based on the language for |
| 951 | that symbol. If no demangled name exists, return NULL. */ |
| 952 | |
| 953 | const char * |
| 954 | symbol_demangled_name (const struct general_symbol_info *gsymbol) |
| 955 | { |
| 956 | const char *dem_name = NULL; |
| 957 | |
| 958 | switch (gsymbol->language) |
| 959 | { |
| 960 | case language_cplus: |
| 961 | case language_d: |
| 962 | case language_go: |
| 963 | case language_java: |
| 964 | case language_objc: |
| 965 | case language_fortran: |
| 966 | dem_name = symbol_get_demangled_name (gsymbol); |
| 967 | break; |
| 968 | case language_ada: |
| 969 | dem_name = ada_decode_symbol (gsymbol); |
| 970 | break; |
| 971 | default: |
| 972 | break; |
| 973 | } |
| 974 | return dem_name; |
| 975 | } |
| 976 | |
| 977 | /* Return the search name of a symbol---generally the demangled or |
| 978 | linkage name of the symbol, depending on how it will be searched for. |
| 979 | If there is no distinct demangled name, then returns the same value |
| 980 | (same pointer) as SYMBOL_LINKAGE_NAME. */ |
| 981 | |
| 982 | const char * |
| 983 | symbol_search_name (const struct general_symbol_info *gsymbol) |
| 984 | { |
| 985 | if (gsymbol->language == language_ada) |
| 986 | return gsymbol->name; |
| 987 | else |
| 988 | return symbol_natural_name (gsymbol); |
| 989 | } |
| 990 | |
| 991 | /* Initialize the structure fields to zero values. */ |
| 992 | |
| 993 | void |
| 994 | init_sal (struct symtab_and_line *sal) |
| 995 | { |
| 996 | memset (sal, 0, sizeof (*sal)); |
| 997 | } |
| 998 | \f |
| 999 | |
| 1000 | /* Return 1 if the two sections are the same, or if they could |
| 1001 | plausibly be copies of each other, one in an original object |
| 1002 | file and another in a separated debug file. */ |
| 1003 | |
| 1004 | int |
| 1005 | matching_obj_sections (struct obj_section *obj_first, |
| 1006 | struct obj_section *obj_second) |
| 1007 | { |
| 1008 | asection *first = obj_first? obj_first->the_bfd_section : NULL; |
| 1009 | asection *second = obj_second? obj_second->the_bfd_section : NULL; |
| 1010 | struct objfile *obj; |
| 1011 | |
| 1012 | /* If they're the same section, then they match. */ |
| 1013 | if (first == second) |
| 1014 | return 1; |
| 1015 | |
| 1016 | /* If either is NULL, give up. */ |
| 1017 | if (first == NULL || second == NULL) |
| 1018 | return 0; |
| 1019 | |
| 1020 | /* This doesn't apply to absolute symbols. */ |
| 1021 | if (first->owner == NULL || second->owner == NULL) |
| 1022 | return 0; |
| 1023 | |
| 1024 | /* If they're in the same object file, they must be different sections. */ |
| 1025 | if (first->owner == second->owner) |
| 1026 | return 0; |
| 1027 | |
| 1028 | /* Check whether the two sections are potentially corresponding. They must |
| 1029 | have the same size, address, and name. We can't compare section indexes, |
| 1030 | which would be more reliable, because some sections may have been |
| 1031 | stripped. */ |
| 1032 | if (bfd_get_section_size (first) != bfd_get_section_size (second)) |
| 1033 | return 0; |
| 1034 | |
| 1035 | /* In-memory addresses may start at a different offset, relativize them. */ |
| 1036 | if (bfd_get_section_vma (first->owner, first) |
| 1037 | - bfd_get_start_address (first->owner) |
| 1038 | != bfd_get_section_vma (second->owner, second) |
| 1039 | - bfd_get_start_address (second->owner)) |
| 1040 | return 0; |
| 1041 | |
| 1042 | if (bfd_get_section_name (first->owner, first) == NULL |
| 1043 | || bfd_get_section_name (second->owner, second) == NULL |
| 1044 | || strcmp (bfd_get_section_name (first->owner, first), |
| 1045 | bfd_get_section_name (second->owner, second)) != 0) |
| 1046 | return 0; |
| 1047 | |
| 1048 | /* Otherwise check that they are in corresponding objfiles. */ |
| 1049 | |
| 1050 | ALL_OBJFILES (obj) |
| 1051 | if (obj->obfd == first->owner) |
| 1052 | break; |
| 1053 | gdb_assert (obj != NULL); |
| 1054 | |
| 1055 | if (obj->separate_debug_objfile != NULL |
| 1056 | && obj->separate_debug_objfile->obfd == second->owner) |
| 1057 | return 1; |
| 1058 | if (obj->separate_debug_objfile_backlink != NULL |
| 1059 | && obj->separate_debug_objfile_backlink->obfd == second->owner) |
| 1060 | return 1; |
| 1061 | |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
| 1065 | struct symtab * |
| 1066 | find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section) |
| 1067 | { |
| 1068 | struct objfile *objfile; |
| 1069 | struct bound_minimal_symbol msymbol; |
| 1070 | |
| 1071 | /* If we know that this is not a text address, return failure. This is |
| 1072 | necessary because we loop based on texthigh and textlow, which do |
| 1073 | not include the data ranges. */ |
| 1074 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 1075 | if (msymbol.minsym |
| 1076 | && (MSYMBOL_TYPE (msymbol.minsym) == mst_data |
| 1077 | || MSYMBOL_TYPE (msymbol.minsym) == mst_bss |
| 1078 | || MSYMBOL_TYPE (msymbol.minsym) == mst_abs |
| 1079 | || MSYMBOL_TYPE (msymbol.minsym) == mst_file_data |
| 1080 | || MSYMBOL_TYPE (msymbol.minsym) == mst_file_bss)) |
| 1081 | return NULL; |
| 1082 | |
| 1083 | ALL_OBJFILES (objfile) |
| 1084 | { |
| 1085 | struct symtab *result = NULL; |
| 1086 | |
| 1087 | if (objfile->sf) |
| 1088 | result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol, |
| 1089 | pc, section, 0); |
| 1090 | if (result) |
| 1091 | return result; |
| 1092 | } |
| 1093 | |
| 1094 | return NULL; |
| 1095 | } |
| 1096 | \f |
| 1097 | /* Debug symbols usually don't have section information. We need to dig that |
| 1098 | out of the minimal symbols and stash that in the debug symbol. */ |
| 1099 | |
| 1100 | void |
| 1101 | fixup_section (struct general_symbol_info *ginfo, |
| 1102 | CORE_ADDR addr, struct objfile *objfile) |
| 1103 | { |
| 1104 | struct minimal_symbol *msym; |
| 1105 | |
| 1106 | /* First, check whether a minimal symbol with the same name exists |
| 1107 | and points to the same address. The address check is required |
| 1108 | e.g. on PowerPC64, where the minimal symbol for a function will |
| 1109 | point to the function descriptor, while the debug symbol will |
| 1110 | point to the actual function code. */ |
| 1111 | msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile); |
| 1112 | if (msym) |
| 1113 | ginfo->section = MSYMBOL_SECTION (msym); |
| 1114 | else |
| 1115 | { |
| 1116 | /* Static, function-local variables do appear in the linker |
| 1117 | (minimal) symbols, but are frequently given names that won't |
| 1118 | be found via lookup_minimal_symbol(). E.g., it has been |
| 1119 | observed in frv-uclinux (ELF) executables that a static, |
| 1120 | function-local variable named "foo" might appear in the |
| 1121 | linker symbols as "foo.6" or "foo.3". Thus, there is no |
| 1122 | point in attempting to extend the lookup-by-name mechanism to |
| 1123 | handle this case due to the fact that there can be multiple |
| 1124 | names. |
| 1125 | |
| 1126 | So, instead, search the section table when lookup by name has |
| 1127 | failed. The ``addr'' and ``endaddr'' fields may have already |
| 1128 | been relocated. If so, the relocation offset (i.e. the |
| 1129 | ANOFFSET value) needs to be subtracted from these values when |
| 1130 | performing the comparison. We unconditionally subtract it, |
| 1131 | because, when no relocation has been performed, the ANOFFSET |
| 1132 | value will simply be zero. |
| 1133 | |
| 1134 | The address of the symbol whose section we're fixing up HAS |
| 1135 | NOT BEEN adjusted (relocated) yet. It can't have been since |
| 1136 | the section isn't yet known and knowing the section is |
| 1137 | necessary in order to add the correct relocation value. In |
| 1138 | other words, we wouldn't even be in this function (attempting |
| 1139 | to compute the section) if it were already known. |
| 1140 | |
| 1141 | Note that it is possible to search the minimal symbols |
| 1142 | (subtracting the relocation value if necessary) to find the |
| 1143 | matching minimal symbol, but this is overkill and much less |
| 1144 | efficient. It is not necessary to find the matching minimal |
| 1145 | symbol, only its section. |
| 1146 | |
| 1147 | Note that this technique (of doing a section table search) |
| 1148 | can fail when unrelocated section addresses overlap. For |
| 1149 | this reason, we still attempt a lookup by name prior to doing |
| 1150 | a search of the section table. */ |
| 1151 | |
| 1152 | struct obj_section *s; |
| 1153 | int fallback = -1; |
| 1154 | |
| 1155 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 1156 | { |
| 1157 | int idx = s - objfile->sections; |
| 1158 | CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx); |
| 1159 | |
| 1160 | if (fallback == -1) |
| 1161 | fallback = idx; |
| 1162 | |
| 1163 | if (obj_section_addr (s) - offset <= addr |
| 1164 | && addr < obj_section_endaddr (s) - offset) |
| 1165 | { |
| 1166 | ginfo->section = idx; |
| 1167 | return; |
| 1168 | } |
| 1169 | } |
| 1170 | |
| 1171 | /* If we didn't find the section, assume it is in the first |
| 1172 | section. If there is no allocated section, then it hardly |
| 1173 | matters what we pick, so just pick zero. */ |
| 1174 | if (fallback == -1) |
| 1175 | ginfo->section = 0; |
| 1176 | else |
| 1177 | ginfo->section = fallback; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | struct symbol * |
| 1182 | fixup_symbol_section (struct symbol *sym, struct objfile *objfile) |
| 1183 | { |
| 1184 | CORE_ADDR addr; |
| 1185 | |
| 1186 | if (!sym) |
| 1187 | return NULL; |
| 1188 | |
| 1189 | /* We either have an OBJFILE, or we can get at it from the sym's |
| 1190 | symtab. Anything else is a bug. */ |
| 1191 | gdb_assert (objfile || SYMBOL_SYMTAB (sym)); |
| 1192 | |
| 1193 | if (objfile == NULL) |
| 1194 | objfile = SYMBOL_SYMTAB (sym)->objfile; |
| 1195 | |
| 1196 | if (SYMBOL_OBJ_SECTION (objfile, sym)) |
| 1197 | return sym; |
| 1198 | |
| 1199 | /* We should have an objfile by now. */ |
| 1200 | gdb_assert (objfile); |
| 1201 | |
| 1202 | switch (SYMBOL_CLASS (sym)) |
| 1203 | { |
| 1204 | case LOC_STATIC: |
| 1205 | case LOC_LABEL: |
| 1206 | addr = SYMBOL_VALUE_ADDRESS (sym); |
| 1207 | break; |
| 1208 | case LOC_BLOCK: |
| 1209 | addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 1210 | break; |
| 1211 | |
| 1212 | default: |
| 1213 | /* Nothing else will be listed in the minsyms -- no use looking |
| 1214 | it up. */ |
| 1215 | return sym; |
| 1216 | } |
| 1217 | |
| 1218 | fixup_section (&sym->ginfo, addr, objfile); |
| 1219 | |
| 1220 | return sym; |
| 1221 | } |
| 1222 | |
| 1223 | /* Compute the demangled form of NAME as used by the various symbol |
| 1224 | lookup functions. The result is stored in *RESULT_NAME. Returns a |
| 1225 | cleanup which can be used to clean up the result. |
| 1226 | |
| 1227 | For Ada, this function just sets *RESULT_NAME to NAME, unmodified. |
| 1228 | Normally, Ada symbol lookups are performed using the encoded name |
| 1229 | rather than the demangled name, and so it might seem to make sense |
| 1230 | for this function to return an encoded version of NAME. |
| 1231 | Unfortunately, we cannot do this, because this function is used in |
| 1232 | circumstances where it is not appropriate to try to encode NAME. |
| 1233 | For instance, when displaying the frame info, we demangle the name |
| 1234 | of each parameter, and then perform a symbol lookup inside our |
| 1235 | function using that demangled name. In Ada, certain functions |
| 1236 | have internally-generated parameters whose name contain uppercase |
| 1237 | characters. Encoding those name would result in those uppercase |
| 1238 | characters to become lowercase, and thus cause the symbol lookup |
| 1239 | to fail. */ |
| 1240 | |
| 1241 | struct cleanup * |
| 1242 | demangle_for_lookup (const char *name, enum language lang, |
| 1243 | const char **result_name) |
| 1244 | { |
| 1245 | char *demangled_name = NULL; |
| 1246 | const char *modified_name = NULL; |
| 1247 | struct cleanup *cleanup = make_cleanup (null_cleanup, 0); |
| 1248 | |
| 1249 | modified_name = name; |
| 1250 | |
| 1251 | /* If we are using C++, D, Go, or Java, demangle the name before doing a |
| 1252 | lookup, so we can always binary search. */ |
| 1253 | if (lang == language_cplus) |
| 1254 | { |
| 1255 | demangled_name = gdb_demangle (name, DMGL_ANSI | DMGL_PARAMS); |
| 1256 | if (demangled_name) |
| 1257 | { |
| 1258 | modified_name = demangled_name; |
| 1259 | make_cleanup (xfree, demangled_name); |
| 1260 | } |
| 1261 | else |
| 1262 | { |
| 1263 | /* If we were given a non-mangled name, canonicalize it |
| 1264 | according to the language (so far only for C++). */ |
| 1265 | demangled_name = cp_canonicalize_string (name); |
| 1266 | if (demangled_name) |
| 1267 | { |
| 1268 | modified_name = demangled_name; |
| 1269 | make_cleanup (xfree, demangled_name); |
| 1270 | } |
| 1271 | } |
| 1272 | } |
| 1273 | else if (lang == language_java) |
| 1274 | { |
| 1275 | demangled_name = gdb_demangle (name, |
| 1276 | DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA); |
| 1277 | if (demangled_name) |
| 1278 | { |
| 1279 | modified_name = demangled_name; |
| 1280 | make_cleanup (xfree, demangled_name); |
| 1281 | } |
| 1282 | } |
| 1283 | else if (lang == language_d) |
| 1284 | { |
| 1285 | demangled_name = d_demangle (name, 0); |
| 1286 | if (demangled_name) |
| 1287 | { |
| 1288 | modified_name = demangled_name; |
| 1289 | make_cleanup (xfree, demangled_name); |
| 1290 | } |
| 1291 | } |
| 1292 | else if (lang == language_go) |
| 1293 | { |
| 1294 | demangled_name = go_demangle (name, 0); |
| 1295 | if (demangled_name) |
| 1296 | { |
| 1297 | modified_name = demangled_name; |
| 1298 | make_cleanup (xfree, demangled_name); |
| 1299 | } |
| 1300 | } |
| 1301 | |
| 1302 | *result_name = modified_name; |
| 1303 | return cleanup; |
| 1304 | } |
| 1305 | |
| 1306 | /* Find the definition for a specified symbol name NAME |
| 1307 | in domain DOMAIN, visible from lexical block BLOCK. |
| 1308 | Returns the struct symbol pointer, or zero if no symbol is found. |
| 1309 | C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if |
| 1310 | NAME is a field of the current implied argument `this'. If so set |
| 1311 | *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero. |
| 1312 | BLOCK_FOUND is set to the block in which NAME is found (in the case of |
| 1313 | a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */ |
| 1314 | |
| 1315 | /* This function (or rather its subordinates) have a bunch of loops and |
| 1316 | it would seem to be attractive to put in some QUIT's (though I'm not really |
| 1317 | sure whether it can run long enough to be really important). But there |
| 1318 | are a few calls for which it would appear to be bad news to quit |
| 1319 | out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note |
| 1320 | that there is C++ code below which can error(), but that probably |
| 1321 | doesn't affect these calls since they are looking for a known |
| 1322 | variable and thus can probably assume it will never hit the C++ |
| 1323 | code). */ |
| 1324 | |
| 1325 | struct symbol * |
| 1326 | lookup_symbol_in_language (const char *name, const struct block *block, |
| 1327 | const domain_enum domain, enum language lang, |
| 1328 | struct field_of_this_result *is_a_field_of_this) |
| 1329 | { |
| 1330 | const char *modified_name; |
| 1331 | struct symbol *returnval; |
| 1332 | struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name); |
| 1333 | |
| 1334 | returnval = lookup_symbol_aux (modified_name, block, domain, lang, |
| 1335 | is_a_field_of_this); |
| 1336 | do_cleanups (cleanup); |
| 1337 | |
| 1338 | return returnval; |
| 1339 | } |
| 1340 | |
| 1341 | /* Behave like lookup_symbol_in_language, but performed with the |
| 1342 | current language. */ |
| 1343 | |
| 1344 | struct symbol * |
| 1345 | lookup_symbol (const char *name, const struct block *block, |
| 1346 | domain_enum domain, |
| 1347 | struct field_of_this_result *is_a_field_of_this) |
| 1348 | { |
| 1349 | return lookup_symbol_in_language (name, block, domain, |
| 1350 | current_language->la_language, |
| 1351 | is_a_field_of_this); |
| 1352 | } |
| 1353 | |
| 1354 | /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if |
| 1355 | found, or NULL if not found. */ |
| 1356 | |
| 1357 | struct symbol * |
| 1358 | lookup_language_this (const struct language_defn *lang, |
| 1359 | const struct block *block) |
| 1360 | { |
| 1361 | if (lang->la_name_of_this == NULL || block == NULL) |
| 1362 | return NULL; |
| 1363 | |
| 1364 | while (block) |
| 1365 | { |
| 1366 | struct symbol *sym; |
| 1367 | |
| 1368 | sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN); |
| 1369 | if (sym != NULL) |
| 1370 | { |
| 1371 | block_found = block; |
| 1372 | return sym; |
| 1373 | } |
| 1374 | if (BLOCK_FUNCTION (block)) |
| 1375 | break; |
| 1376 | block = BLOCK_SUPERBLOCK (block); |
| 1377 | } |
| 1378 | |
| 1379 | return NULL; |
| 1380 | } |
| 1381 | |
| 1382 | /* Given TYPE, a structure/union, |
| 1383 | return 1 if the component named NAME from the ultimate target |
| 1384 | structure/union is defined, otherwise, return 0. */ |
| 1385 | |
| 1386 | static int |
| 1387 | check_field (struct type *type, const char *name, |
| 1388 | struct field_of_this_result *is_a_field_of_this) |
| 1389 | { |
| 1390 | int i; |
| 1391 | |
| 1392 | /* The type may be a stub. */ |
| 1393 | CHECK_TYPEDEF (type); |
| 1394 | |
| 1395 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) |
| 1396 | { |
| 1397 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 1398 | |
| 1399 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
| 1400 | { |
| 1401 | is_a_field_of_this->type = type; |
| 1402 | is_a_field_of_this->field = &TYPE_FIELD (type, i); |
| 1403 | return 1; |
| 1404 | } |
| 1405 | } |
| 1406 | |
| 1407 | /* C++: If it was not found as a data field, then try to return it |
| 1408 | as a pointer to a method. */ |
| 1409 | |
| 1410 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) |
| 1411 | { |
| 1412 | if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0) |
| 1413 | { |
| 1414 | is_a_field_of_this->type = type; |
| 1415 | is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i); |
| 1416 | return 1; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
| 1421 | if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this)) |
| 1422 | return 1; |
| 1423 | |
| 1424 | return 0; |
| 1425 | } |
| 1426 | |
| 1427 | /* Behave like lookup_symbol except that NAME is the natural name |
| 1428 | (e.g., demangled name) of the symbol that we're looking for. */ |
| 1429 | |
| 1430 | static struct symbol * |
| 1431 | lookup_symbol_aux (const char *name, const struct block *block, |
| 1432 | const domain_enum domain, enum language language, |
| 1433 | struct field_of_this_result *is_a_field_of_this) |
| 1434 | { |
| 1435 | struct symbol *sym; |
| 1436 | const struct language_defn *langdef; |
| 1437 | |
| 1438 | /* Make sure we do something sensible with is_a_field_of_this, since |
| 1439 | the callers that set this parameter to some non-null value will |
| 1440 | certainly use it later. If we don't set it, the contents of |
| 1441 | is_a_field_of_this are undefined. */ |
| 1442 | if (is_a_field_of_this != NULL) |
| 1443 | memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this)); |
| 1444 | |
| 1445 | /* Search specified block and its superiors. Don't search |
| 1446 | STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 1447 | |
| 1448 | sym = lookup_symbol_aux_local (name, block, domain, language); |
| 1449 | if (sym != NULL) |
| 1450 | return sym; |
| 1451 | |
| 1452 | /* If requested to do so by the caller and if appropriate for LANGUAGE, |
| 1453 | check to see if NAME is a field of `this'. */ |
| 1454 | |
| 1455 | langdef = language_def (language); |
| 1456 | |
| 1457 | /* Don't do this check if we are searching for a struct. It will |
| 1458 | not be found by check_field, but will be found by other |
| 1459 | means. */ |
| 1460 | if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN) |
| 1461 | { |
| 1462 | struct symbol *sym = lookup_language_this (langdef, block); |
| 1463 | |
| 1464 | if (sym) |
| 1465 | { |
| 1466 | struct type *t = sym->type; |
| 1467 | |
| 1468 | /* I'm not really sure that type of this can ever |
| 1469 | be typedefed; just be safe. */ |
| 1470 | CHECK_TYPEDEF (t); |
| 1471 | if (TYPE_CODE (t) == TYPE_CODE_PTR |
| 1472 | || TYPE_CODE (t) == TYPE_CODE_REF) |
| 1473 | t = TYPE_TARGET_TYPE (t); |
| 1474 | |
| 1475 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
| 1476 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
| 1477 | error (_("Internal error: `%s' is not an aggregate"), |
| 1478 | langdef->la_name_of_this); |
| 1479 | |
| 1480 | if (check_field (t, name, is_a_field_of_this)) |
| 1481 | return NULL; |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | /* Now do whatever is appropriate for LANGUAGE to look |
| 1486 | up static and global variables. */ |
| 1487 | |
| 1488 | sym = langdef->la_lookup_symbol_nonlocal (name, block, domain); |
| 1489 | if (sym != NULL) |
| 1490 | return sym; |
| 1491 | |
| 1492 | /* Now search all static file-level symbols. Not strictly correct, |
| 1493 | but more useful than an error. */ |
| 1494 | |
| 1495 | return lookup_static_symbol_aux (name, domain); |
| 1496 | } |
| 1497 | |
| 1498 | /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs |
| 1499 | first, then check the psymtabs. If a psymtab indicates the existence of the |
| 1500 | desired name as a file-level static, then do psymtab-to-symtab conversion on |
| 1501 | the fly and return the found symbol. */ |
| 1502 | |
| 1503 | struct symbol * |
| 1504 | lookup_static_symbol_aux (const char *name, const domain_enum domain) |
| 1505 | { |
| 1506 | struct objfile *objfile; |
| 1507 | struct symbol *sym; |
| 1508 | |
| 1509 | sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain); |
| 1510 | if (sym != NULL) |
| 1511 | return sym; |
| 1512 | |
| 1513 | ALL_OBJFILES (objfile) |
| 1514 | { |
| 1515 | sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain); |
| 1516 | if (sym != NULL) |
| 1517 | return sym; |
| 1518 | } |
| 1519 | |
| 1520 | return NULL; |
| 1521 | } |
| 1522 | |
| 1523 | /* Check to see if the symbol is defined in BLOCK or its superiors. |
| 1524 | Don't search STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 1525 | |
| 1526 | static struct symbol * |
| 1527 | lookup_symbol_aux_local (const char *name, const struct block *block, |
| 1528 | const domain_enum domain, |
| 1529 | enum language language) |
| 1530 | { |
| 1531 | struct symbol *sym; |
| 1532 | const struct block *static_block = block_static_block (block); |
| 1533 | const char *scope = block_scope (block); |
| 1534 | |
| 1535 | /* Check if either no block is specified or it's a global block. */ |
| 1536 | |
| 1537 | if (static_block == NULL) |
| 1538 | return NULL; |
| 1539 | |
| 1540 | while (block != static_block) |
| 1541 | { |
| 1542 | sym = lookup_symbol_aux_block (name, block, domain); |
| 1543 | if (sym != NULL) |
| 1544 | return sym; |
| 1545 | |
| 1546 | if (language == language_cplus || language == language_fortran) |
| 1547 | { |
| 1548 | sym = cp_lookup_symbol_imports_or_template (scope, name, block, |
| 1549 | domain); |
| 1550 | if (sym != NULL) |
| 1551 | return sym; |
| 1552 | } |
| 1553 | |
| 1554 | if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block)) |
| 1555 | break; |
| 1556 | block = BLOCK_SUPERBLOCK (block); |
| 1557 | } |
| 1558 | |
| 1559 | /* We've reached the edge of the function without finding a result. */ |
| 1560 | |
| 1561 | return NULL; |
| 1562 | } |
| 1563 | |
| 1564 | /* Look up OBJFILE to BLOCK. */ |
| 1565 | |
| 1566 | struct objfile * |
| 1567 | lookup_objfile_from_block (const struct block *block) |
| 1568 | { |
| 1569 | struct objfile *obj; |
| 1570 | struct symtab *s; |
| 1571 | |
| 1572 | if (block == NULL) |
| 1573 | return NULL; |
| 1574 | |
| 1575 | block = block_global_block (block); |
| 1576 | /* Go through SYMTABS. */ |
| 1577 | ALL_SYMTABS (obj, s) |
| 1578 | if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK)) |
| 1579 | { |
| 1580 | if (obj->separate_debug_objfile_backlink) |
| 1581 | obj = obj->separate_debug_objfile_backlink; |
| 1582 | |
| 1583 | return obj; |
| 1584 | } |
| 1585 | |
| 1586 | return NULL; |
| 1587 | } |
| 1588 | |
| 1589 | /* Look up a symbol in a block; if found, fixup the symbol, and set |
| 1590 | block_found appropriately. */ |
| 1591 | |
| 1592 | struct symbol * |
| 1593 | lookup_symbol_aux_block (const char *name, const struct block *block, |
| 1594 | const domain_enum domain) |
| 1595 | { |
| 1596 | struct symbol *sym; |
| 1597 | |
| 1598 | sym = lookup_block_symbol (block, name, domain); |
| 1599 | if (sym) |
| 1600 | { |
| 1601 | block_found = block; |
| 1602 | return fixup_symbol_section (sym, NULL); |
| 1603 | } |
| 1604 | |
| 1605 | return NULL; |
| 1606 | } |
| 1607 | |
| 1608 | /* Check all global symbols in OBJFILE in symtabs and |
| 1609 | psymtabs. */ |
| 1610 | |
| 1611 | struct symbol * |
| 1612 | lookup_global_symbol_from_objfile (const struct objfile *main_objfile, |
| 1613 | const char *name, |
| 1614 | const domain_enum domain) |
| 1615 | { |
| 1616 | const struct objfile *objfile; |
| 1617 | struct symbol *sym; |
| 1618 | const struct blockvector *bv; |
| 1619 | const struct block *block; |
| 1620 | struct symtab *s; |
| 1621 | |
| 1622 | for (objfile = main_objfile; |
| 1623 | objfile; |
| 1624 | objfile = objfile_separate_debug_iterate (main_objfile, objfile)) |
| 1625 | { |
| 1626 | /* Go through symtabs. */ |
| 1627 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
| 1628 | { |
| 1629 | bv = BLOCKVECTOR (s); |
| 1630 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1631 | sym = lookup_block_symbol (block, name, domain); |
| 1632 | if (sym) |
| 1633 | { |
| 1634 | block_found = block; |
| 1635 | return fixup_symbol_section (sym, (struct objfile *)objfile); |
| 1636 | } |
| 1637 | } |
| 1638 | |
| 1639 | sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK, |
| 1640 | name, domain); |
| 1641 | if (sym) |
| 1642 | return sym; |
| 1643 | } |
| 1644 | |
| 1645 | return NULL; |
| 1646 | } |
| 1647 | |
| 1648 | /* Check to see if the symbol is defined in one of the OBJFILE's |
| 1649 | symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK, |
| 1650 | depending on whether or not we want to search global symbols or |
| 1651 | static symbols. */ |
| 1652 | |
| 1653 | static struct symbol * |
| 1654 | lookup_symbol_aux_objfile (struct objfile *objfile, int block_index, |
| 1655 | const char *name, const domain_enum domain) |
| 1656 | { |
| 1657 | struct symbol *sym = NULL; |
| 1658 | const struct blockvector *bv; |
| 1659 | const struct block *block; |
| 1660 | struct symtab *s; |
| 1661 | |
| 1662 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
| 1663 | { |
| 1664 | bv = BLOCKVECTOR (s); |
| 1665 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 1666 | sym = lookup_block_symbol (block, name, domain); |
| 1667 | if (sym) |
| 1668 | { |
| 1669 | block_found = block; |
| 1670 | return fixup_symbol_section (sym, objfile); |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | return NULL; |
| 1675 | } |
| 1676 | |
| 1677 | /* Same as lookup_symbol_aux_objfile, except that it searches all |
| 1678 | objfiles. Return the first match found. */ |
| 1679 | |
| 1680 | static struct symbol * |
| 1681 | lookup_symbol_aux_symtabs (int block_index, const char *name, |
| 1682 | const domain_enum domain) |
| 1683 | { |
| 1684 | struct symbol *sym; |
| 1685 | struct objfile *objfile; |
| 1686 | |
| 1687 | ALL_OBJFILES (objfile) |
| 1688 | { |
| 1689 | sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain); |
| 1690 | if (sym) |
| 1691 | return sym; |
| 1692 | } |
| 1693 | |
| 1694 | return NULL; |
| 1695 | } |
| 1696 | |
| 1697 | /* Wrapper around lookup_symbol_aux_objfile for search_symbols. |
| 1698 | Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE |
| 1699 | and all related objfiles. */ |
| 1700 | |
| 1701 | static struct symbol * |
| 1702 | lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile, |
| 1703 | const char *linkage_name, |
| 1704 | domain_enum domain) |
| 1705 | { |
| 1706 | enum language lang = current_language->la_language; |
| 1707 | const char *modified_name; |
| 1708 | struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang, |
| 1709 | &modified_name); |
| 1710 | struct objfile *main_objfile, *cur_objfile; |
| 1711 | |
| 1712 | if (objfile->separate_debug_objfile_backlink) |
| 1713 | main_objfile = objfile->separate_debug_objfile_backlink; |
| 1714 | else |
| 1715 | main_objfile = objfile; |
| 1716 | |
| 1717 | for (cur_objfile = main_objfile; |
| 1718 | cur_objfile; |
| 1719 | cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile)) |
| 1720 | { |
| 1721 | struct symbol *sym; |
| 1722 | |
| 1723 | sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK, |
| 1724 | modified_name, domain); |
| 1725 | if (sym == NULL) |
| 1726 | sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK, |
| 1727 | modified_name, domain); |
| 1728 | if (sym != NULL) |
| 1729 | { |
| 1730 | do_cleanups (cleanup); |
| 1731 | return sym; |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | do_cleanups (cleanup); |
| 1736 | return NULL; |
| 1737 | } |
| 1738 | |
| 1739 | /* A helper function that throws an exception when a symbol was found |
| 1740 | in a psymtab but not in a symtab. */ |
| 1741 | |
| 1742 | static void ATTRIBUTE_NORETURN |
| 1743 | error_in_psymtab_expansion (int kind, const char *name, struct symtab *symtab) |
| 1744 | { |
| 1745 | error (_("\ |
| 1746 | Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\ |
| 1747 | %s may be an inlined function, or may be a template function\n \ |
| 1748 | (if a template, try specifying an instantiation: %s<type>)."), |
| 1749 | kind == GLOBAL_BLOCK ? "global" : "static", |
| 1750 | name, symtab_to_filename_for_display (symtab), name, name); |
| 1751 | } |
| 1752 | |
| 1753 | /* A helper function for lookup_symbol_aux that interfaces with the |
| 1754 | "quick" symbol table functions. */ |
| 1755 | |
| 1756 | static struct symbol * |
| 1757 | lookup_symbol_aux_quick (struct objfile *objfile, int kind, |
| 1758 | const char *name, const domain_enum domain) |
| 1759 | { |
| 1760 | struct symtab *symtab; |
| 1761 | const struct blockvector *bv; |
| 1762 | const struct block *block; |
| 1763 | struct symbol *sym; |
| 1764 | |
| 1765 | if (!objfile->sf) |
| 1766 | return NULL; |
| 1767 | symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain); |
| 1768 | if (!symtab) |
| 1769 | return NULL; |
| 1770 | |
| 1771 | bv = BLOCKVECTOR (symtab); |
| 1772 | block = BLOCKVECTOR_BLOCK (bv, kind); |
| 1773 | sym = lookup_block_symbol (block, name, domain); |
| 1774 | if (!sym) |
| 1775 | error_in_psymtab_expansion (kind, name, symtab); |
| 1776 | return fixup_symbol_section (sym, objfile); |
| 1777 | } |
| 1778 | |
| 1779 | /* A default version of lookup_symbol_nonlocal for use by languages |
| 1780 | that can't think of anything better to do. This implements the C |
| 1781 | lookup rules. */ |
| 1782 | |
| 1783 | struct symbol * |
| 1784 | basic_lookup_symbol_nonlocal (const char *name, |
| 1785 | const struct block *block, |
| 1786 | const domain_enum domain) |
| 1787 | { |
| 1788 | struct symbol *sym; |
| 1789 | |
| 1790 | /* NOTE: carlton/2003-05-19: The comments below were written when |
| 1791 | this (or what turned into this) was part of lookup_symbol_aux; |
| 1792 | I'm much less worried about these questions now, since these |
| 1793 | decisions have turned out well, but I leave these comments here |
| 1794 | for posterity. */ |
| 1795 | |
| 1796 | /* NOTE: carlton/2002-12-05: There is a question as to whether or |
| 1797 | not it would be appropriate to search the current global block |
| 1798 | here as well. (That's what this code used to do before the |
| 1799 | is_a_field_of_this check was moved up.) On the one hand, it's |
| 1800 | redundant with the lookup_symbol_aux_symtabs search that happens |
| 1801 | next. On the other hand, if decode_line_1 is passed an argument |
| 1802 | like filename:var, then the user presumably wants 'var' to be |
| 1803 | searched for in filename. On the third hand, there shouldn't be |
| 1804 | multiple global variables all of which are named 'var', and it's |
| 1805 | not like decode_line_1 has ever restricted its search to only |
| 1806 | global variables in a single filename. All in all, only |
| 1807 | searching the static block here seems best: it's correct and it's |
| 1808 | cleanest. */ |
| 1809 | |
| 1810 | /* NOTE: carlton/2002-12-05: There's also a possible performance |
| 1811 | issue here: if you usually search for global symbols in the |
| 1812 | current file, then it would be slightly better to search the |
| 1813 | current global block before searching all the symtabs. But there |
| 1814 | are other factors that have a much greater effect on performance |
| 1815 | than that one, so I don't think we should worry about that for |
| 1816 | now. */ |
| 1817 | |
| 1818 | sym = lookup_symbol_static (name, block, domain); |
| 1819 | if (sym != NULL) |
| 1820 | return sym; |
| 1821 | |
| 1822 | return lookup_symbol_global (name, block, domain); |
| 1823 | } |
| 1824 | |
| 1825 | /* Lookup a symbol in the static block associated to BLOCK, if there |
| 1826 | is one; do nothing if BLOCK is NULL or a global block. */ |
| 1827 | |
| 1828 | struct symbol * |
| 1829 | lookup_symbol_static (const char *name, |
| 1830 | const struct block *block, |
| 1831 | const domain_enum domain) |
| 1832 | { |
| 1833 | const struct block *static_block = block_static_block (block); |
| 1834 | |
| 1835 | if (static_block != NULL) |
| 1836 | return lookup_symbol_aux_block (name, static_block, domain); |
| 1837 | else |
| 1838 | return NULL; |
| 1839 | } |
| 1840 | |
| 1841 | /* Private data to be used with lookup_symbol_global_iterator_cb. */ |
| 1842 | |
| 1843 | struct global_sym_lookup_data |
| 1844 | { |
| 1845 | /* The name of the symbol we are searching for. */ |
| 1846 | const char *name; |
| 1847 | |
| 1848 | /* The domain to use for our search. */ |
| 1849 | domain_enum domain; |
| 1850 | |
| 1851 | /* The field where the callback should store the symbol if found. |
| 1852 | It should be initialized to NULL before the search is started. */ |
| 1853 | struct symbol *result; |
| 1854 | }; |
| 1855 | |
| 1856 | /* A callback function for gdbarch_iterate_over_objfiles_in_search_order. |
| 1857 | It searches by name for a symbol in the GLOBAL_BLOCK of the given |
| 1858 | OBJFILE. The arguments for the search are passed via CB_DATA, |
| 1859 | which in reality is a pointer to struct global_sym_lookup_data. */ |
| 1860 | |
| 1861 | static int |
| 1862 | lookup_symbol_global_iterator_cb (struct objfile *objfile, |
| 1863 | void *cb_data) |
| 1864 | { |
| 1865 | struct global_sym_lookup_data *data = |
| 1866 | (struct global_sym_lookup_data *) cb_data; |
| 1867 | |
| 1868 | gdb_assert (data->result == NULL); |
| 1869 | |
| 1870 | data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK, |
| 1871 | data->name, data->domain); |
| 1872 | if (data->result == NULL) |
| 1873 | data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK, |
| 1874 | data->name, data->domain); |
| 1875 | |
| 1876 | /* If we found a match, tell the iterator to stop. Otherwise, |
| 1877 | keep going. */ |
| 1878 | return (data->result != NULL); |
| 1879 | } |
| 1880 | |
| 1881 | /* Lookup a symbol in all files' global blocks (searching psymtabs if |
| 1882 | necessary). */ |
| 1883 | |
| 1884 | struct symbol * |
| 1885 | lookup_symbol_global (const char *name, |
| 1886 | const struct block *block, |
| 1887 | const domain_enum domain) |
| 1888 | { |
| 1889 | struct symbol *sym = NULL; |
| 1890 | struct objfile *objfile = NULL; |
| 1891 | struct global_sym_lookup_data lookup_data; |
| 1892 | |
| 1893 | /* Call library-specific lookup procedure. */ |
| 1894 | objfile = lookup_objfile_from_block (block); |
| 1895 | if (objfile != NULL) |
| 1896 | sym = solib_global_lookup (objfile, name, domain); |
| 1897 | if (sym != NULL) |
| 1898 | return sym; |
| 1899 | |
| 1900 | memset (&lookup_data, 0, sizeof (lookup_data)); |
| 1901 | lookup_data.name = name; |
| 1902 | lookup_data.domain = domain; |
| 1903 | gdbarch_iterate_over_objfiles_in_search_order |
| 1904 | (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (), |
| 1905 | lookup_symbol_global_iterator_cb, &lookup_data, objfile); |
| 1906 | |
| 1907 | return lookup_data.result; |
| 1908 | } |
| 1909 | |
| 1910 | int |
| 1911 | symbol_matches_domain (enum language symbol_language, |
| 1912 | domain_enum symbol_domain, |
| 1913 | domain_enum domain) |
| 1914 | { |
| 1915 | /* For C++ "struct foo { ... }" also defines a typedef for "foo". |
| 1916 | A Java class declaration also defines a typedef for the class. |
| 1917 | Similarly, any Ada type declaration implicitly defines a typedef. */ |
| 1918 | if (symbol_language == language_cplus |
| 1919 | || symbol_language == language_d |
| 1920 | || symbol_language == language_java |
| 1921 | || symbol_language == language_ada) |
| 1922 | { |
| 1923 | if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN) |
| 1924 | && symbol_domain == STRUCT_DOMAIN) |
| 1925 | return 1; |
| 1926 | } |
| 1927 | /* For all other languages, strict match is required. */ |
| 1928 | return (symbol_domain == domain); |
| 1929 | } |
| 1930 | |
| 1931 | /* Look up a type named NAME in the struct_domain. The type returned |
| 1932 | must not be opaque -- i.e., must have at least one field |
| 1933 | defined. */ |
| 1934 | |
| 1935 | struct type * |
| 1936 | lookup_transparent_type (const char *name) |
| 1937 | { |
| 1938 | return current_language->la_lookup_transparent_type (name); |
| 1939 | } |
| 1940 | |
| 1941 | /* A helper for basic_lookup_transparent_type that interfaces with the |
| 1942 | "quick" symbol table functions. */ |
| 1943 | |
| 1944 | static struct type * |
| 1945 | basic_lookup_transparent_type_quick (struct objfile *objfile, int kind, |
| 1946 | const char *name) |
| 1947 | { |
| 1948 | struct symtab *symtab; |
| 1949 | const struct blockvector *bv; |
| 1950 | struct block *block; |
| 1951 | struct symbol *sym; |
| 1952 | |
| 1953 | if (!objfile->sf) |
| 1954 | return NULL; |
| 1955 | symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN); |
| 1956 | if (!symtab) |
| 1957 | return NULL; |
| 1958 | |
| 1959 | bv = BLOCKVECTOR (symtab); |
| 1960 | block = BLOCKVECTOR_BLOCK (bv, kind); |
| 1961 | sym = lookup_block_symbol (block, name, STRUCT_DOMAIN); |
| 1962 | if (!sym) |
| 1963 | error_in_psymtab_expansion (kind, name, symtab); |
| 1964 | |
| 1965 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 1966 | return SYMBOL_TYPE (sym); |
| 1967 | |
| 1968 | return NULL; |
| 1969 | } |
| 1970 | |
| 1971 | /* The standard implementation of lookup_transparent_type. This code |
| 1972 | was modeled on lookup_symbol -- the parts not relevant to looking |
| 1973 | up types were just left out. In particular it's assumed here that |
| 1974 | types are available in struct_domain and only at file-static or |
| 1975 | global blocks. */ |
| 1976 | |
| 1977 | struct type * |
| 1978 | basic_lookup_transparent_type (const char *name) |
| 1979 | { |
| 1980 | struct symbol *sym; |
| 1981 | struct symtab *s = NULL; |
| 1982 | const struct blockvector *bv; |
| 1983 | struct objfile *objfile; |
| 1984 | struct block *block; |
| 1985 | struct type *t; |
| 1986 | |
| 1987 | /* Now search all the global symbols. Do the symtab's first, then |
| 1988 | check the psymtab's. If a psymtab indicates the existence |
| 1989 | of the desired name as a global, then do psymtab-to-symtab |
| 1990 | conversion on the fly and return the found symbol. */ |
| 1991 | |
| 1992 | ALL_OBJFILES (objfile) |
| 1993 | { |
| 1994 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
| 1995 | { |
| 1996 | bv = BLOCKVECTOR (s); |
| 1997 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1998 | sym = lookup_block_symbol (block, name, STRUCT_DOMAIN); |
| 1999 | if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 2000 | { |
| 2001 | return SYMBOL_TYPE (sym); |
| 2002 | } |
| 2003 | } |
| 2004 | } |
| 2005 | |
| 2006 | ALL_OBJFILES (objfile) |
| 2007 | { |
| 2008 | t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name); |
| 2009 | if (t) |
| 2010 | return t; |
| 2011 | } |
| 2012 | |
| 2013 | /* Now search the static file-level symbols. |
| 2014 | Not strictly correct, but more useful than an error. |
| 2015 | Do the symtab's first, then |
| 2016 | check the psymtab's. If a psymtab indicates the existence |
| 2017 | of the desired name as a file-level static, then do psymtab-to-symtab |
| 2018 | conversion on the fly and return the found symbol. */ |
| 2019 | |
| 2020 | ALL_OBJFILES (objfile) |
| 2021 | { |
| 2022 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
| 2023 | { |
| 2024 | bv = BLOCKVECTOR (s); |
| 2025 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 2026 | sym = lookup_block_symbol (block, name, STRUCT_DOMAIN); |
| 2027 | if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 2028 | { |
| 2029 | return SYMBOL_TYPE (sym); |
| 2030 | } |
| 2031 | } |
| 2032 | } |
| 2033 | |
| 2034 | ALL_OBJFILES (objfile) |
| 2035 | { |
| 2036 | t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name); |
| 2037 | if (t) |
| 2038 | return t; |
| 2039 | } |
| 2040 | |
| 2041 | return (struct type *) 0; |
| 2042 | } |
| 2043 | |
| 2044 | /* Search BLOCK for symbol NAME in DOMAIN. |
| 2045 | |
| 2046 | Note that if NAME is the demangled form of a C++ symbol, we will fail |
| 2047 | to find a match during the binary search of the non-encoded names, but |
| 2048 | for now we don't worry about the slight inefficiency of looking for |
| 2049 | a match we'll never find, since it will go pretty quick. Once the |
| 2050 | binary search terminates, we drop through and do a straight linear |
| 2051 | search on the symbols. Each symbol which is marked as being a ObjC/C++ |
| 2052 | symbol (language_cplus or language_objc set) has both the encoded and |
| 2053 | non-encoded names tested for a match. */ |
| 2054 | |
| 2055 | struct symbol * |
| 2056 | lookup_block_symbol (const struct block *block, const char *name, |
| 2057 | const domain_enum domain) |
| 2058 | { |
| 2059 | struct block_iterator iter; |
| 2060 | struct symbol *sym; |
| 2061 | |
| 2062 | if (!BLOCK_FUNCTION (block)) |
| 2063 | { |
| 2064 | for (sym = block_iter_name_first (block, name, &iter); |
| 2065 | sym != NULL; |
| 2066 | sym = block_iter_name_next (name, &iter)) |
| 2067 | { |
| 2068 | if (symbol_matches_domain (SYMBOL_LANGUAGE (sym), |
| 2069 | SYMBOL_DOMAIN (sym), domain)) |
| 2070 | return sym; |
| 2071 | } |
| 2072 | return NULL; |
| 2073 | } |
| 2074 | else |
| 2075 | { |
| 2076 | /* Note that parameter symbols do not always show up last in the |
| 2077 | list; this loop makes sure to take anything else other than |
| 2078 | parameter symbols first; it only uses parameter symbols as a |
| 2079 | last resort. Note that this only takes up extra computation |
| 2080 | time on a match. */ |
| 2081 | |
| 2082 | struct symbol *sym_found = NULL; |
| 2083 | |
| 2084 | for (sym = block_iter_name_first (block, name, &iter); |
| 2085 | sym != NULL; |
| 2086 | sym = block_iter_name_next (name, &iter)) |
| 2087 | { |
| 2088 | if (symbol_matches_domain (SYMBOL_LANGUAGE (sym), |
| 2089 | SYMBOL_DOMAIN (sym), domain)) |
| 2090 | { |
| 2091 | sym_found = sym; |
| 2092 | if (!SYMBOL_IS_ARGUMENT (sym)) |
| 2093 | { |
| 2094 | break; |
| 2095 | } |
| 2096 | } |
| 2097 | } |
| 2098 | return (sym_found); /* Will be NULL if not found. */ |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK. |
| 2103 | |
| 2104 | For each symbol that matches, CALLBACK is called. The symbol and |
| 2105 | DATA are passed to the callback. |
| 2106 | |
| 2107 | If CALLBACK returns zero, the iteration ends. Otherwise, the |
| 2108 | search continues. */ |
| 2109 | |
| 2110 | void |
| 2111 | iterate_over_symbols (const struct block *block, const char *name, |
| 2112 | const domain_enum domain, |
| 2113 | symbol_found_callback_ftype *callback, |
| 2114 | void *data) |
| 2115 | { |
| 2116 | struct block_iterator iter; |
| 2117 | struct symbol *sym; |
| 2118 | |
| 2119 | for (sym = block_iter_name_first (block, name, &iter); |
| 2120 | sym != NULL; |
| 2121 | sym = block_iter_name_next (name, &iter)) |
| 2122 | { |
| 2123 | if (symbol_matches_domain (SYMBOL_LANGUAGE (sym), |
| 2124 | SYMBOL_DOMAIN (sym), domain)) |
| 2125 | { |
| 2126 | if (!callback (sym, data)) |
| 2127 | return; |
| 2128 | } |
| 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | /* Find the symtab associated with PC and SECTION. Look through the |
| 2133 | psymtabs and read in another symtab if necessary. */ |
| 2134 | |
| 2135 | struct symtab * |
| 2136 | find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section) |
| 2137 | { |
| 2138 | struct block *b; |
| 2139 | const struct blockvector *bv; |
| 2140 | struct symtab *s = NULL; |
| 2141 | struct symtab *best_s = NULL; |
| 2142 | struct objfile *objfile; |
| 2143 | CORE_ADDR distance = 0; |
| 2144 | struct bound_minimal_symbol msymbol; |
| 2145 | |
| 2146 | /* If we know that this is not a text address, return failure. This is |
| 2147 | necessary because we loop based on the block's high and low code |
| 2148 | addresses, which do not include the data ranges, and because |
| 2149 | we call find_pc_sect_psymtab which has a similar restriction based |
| 2150 | on the partial_symtab's texthigh and textlow. */ |
| 2151 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 2152 | if (msymbol.minsym |
| 2153 | && (MSYMBOL_TYPE (msymbol.minsym) == mst_data |
| 2154 | || MSYMBOL_TYPE (msymbol.minsym) == mst_bss |
| 2155 | || MSYMBOL_TYPE (msymbol.minsym) == mst_abs |
| 2156 | || MSYMBOL_TYPE (msymbol.minsym) == mst_file_data |
| 2157 | || MSYMBOL_TYPE (msymbol.minsym) == mst_file_bss)) |
| 2158 | return NULL; |
| 2159 | |
| 2160 | /* Search all symtabs for the one whose file contains our address, and which |
| 2161 | is the smallest of all the ones containing the address. This is designed |
| 2162 | to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000 |
| 2163 | and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from |
| 2164 | 0x1000-0x4000, but for address 0x2345 we want to return symtab b. |
| 2165 | |
| 2166 | This happens for native ecoff format, where code from included files |
| 2167 | gets its own symtab. The symtab for the included file should have |
| 2168 | been read in already via the dependency mechanism. |
| 2169 | It might be swifter to create several symtabs with the same name |
| 2170 | like xcoff does (I'm not sure). |
| 2171 | |
| 2172 | It also happens for objfiles that have their functions reordered. |
| 2173 | For these, the symtab we are looking for is not necessarily read in. */ |
| 2174 | |
| 2175 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 2176 | { |
| 2177 | bv = BLOCKVECTOR (s); |
| 2178 | b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 2179 | |
| 2180 | if (BLOCK_START (b) <= pc |
| 2181 | && BLOCK_END (b) > pc |
| 2182 | && (distance == 0 |
| 2183 | || BLOCK_END (b) - BLOCK_START (b) < distance)) |
| 2184 | { |
| 2185 | /* For an objfile that has its functions reordered, |
| 2186 | find_pc_psymtab will find the proper partial symbol table |
| 2187 | and we simply return its corresponding symtab. */ |
| 2188 | /* In order to better support objfiles that contain both |
| 2189 | stabs and coff debugging info, we continue on if a psymtab |
| 2190 | can't be found. */ |
| 2191 | if ((objfile->flags & OBJF_REORDERED) && objfile->sf) |
| 2192 | { |
| 2193 | struct symtab *result; |
| 2194 | |
| 2195 | result |
| 2196 | = objfile->sf->qf->find_pc_sect_symtab (objfile, |
| 2197 | msymbol, |
| 2198 | pc, section, |
| 2199 | 0); |
| 2200 | if (result) |
| 2201 | return result; |
| 2202 | } |
| 2203 | if (section != 0) |
| 2204 | { |
| 2205 | struct block_iterator iter; |
| 2206 | struct symbol *sym = NULL; |
| 2207 | |
| 2208 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 2209 | { |
| 2210 | fixup_symbol_section (sym, objfile); |
| 2211 | if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile, sym), |
| 2212 | section)) |
| 2213 | break; |
| 2214 | } |
| 2215 | if (sym == NULL) |
| 2216 | continue; /* No symbol in this symtab matches |
| 2217 | section. */ |
| 2218 | } |
| 2219 | distance = BLOCK_END (b) - BLOCK_START (b); |
| 2220 | best_s = s; |
| 2221 | } |
| 2222 | } |
| 2223 | |
| 2224 | if (best_s != NULL) |
| 2225 | return (best_s); |
| 2226 | |
| 2227 | /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */ |
| 2228 | |
| 2229 | ALL_OBJFILES (objfile) |
| 2230 | { |
| 2231 | struct symtab *result; |
| 2232 | |
| 2233 | if (!objfile->sf) |
| 2234 | continue; |
| 2235 | result = objfile->sf->qf->find_pc_sect_symtab (objfile, |
| 2236 | msymbol, |
| 2237 | pc, section, |
| 2238 | 1); |
| 2239 | if (result) |
| 2240 | return result; |
| 2241 | } |
| 2242 | |
| 2243 | return NULL; |
| 2244 | } |
| 2245 | |
| 2246 | /* Find the symtab associated with PC. Look through the psymtabs and read |
| 2247 | in another symtab if necessary. Backward compatibility, no section. */ |
| 2248 | |
| 2249 | struct symtab * |
| 2250 | find_pc_symtab (CORE_ADDR pc) |
| 2251 | { |
| 2252 | return find_pc_sect_symtab (pc, find_pc_mapped_section (pc)); |
| 2253 | } |
| 2254 | \f |
| 2255 | |
| 2256 | /* Find the source file and line number for a given PC value and SECTION. |
| 2257 | Return a structure containing a symtab pointer, a line number, |
| 2258 | and a pc range for the entire source line. |
| 2259 | The value's .pc field is NOT the specified pc. |
| 2260 | NOTCURRENT nonzero means, if specified pc is on a line boundary, |
| 2261 | use the line that ends there. Otherwise, in that case, the line |
| 2262 | that begins there is used. */ |
| 2263 | |
| 2264 | /* The big complication here is that a line may start in one file, and end just |
| 2265 | before the start of another file. This usually occurs when you #include |
| 2266 | code in the middle of a subroutine. To properly find the end of a line's PC |
| 2267 | range, we must search all symtabs associated with this compilation unit, and |
| 2268 | find the one whose first PC is closer than that of the next line in this |
| 2269 | symtab. */ |
| 2270 | |
| 2271 | /* If it's worth the effort, we could be using a binary search. */ |
| 2272 | |
| 2273 | struct symtab_and_line |
| 2274 | find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent) |
| 2275 | { |
| 2276 | struct symtab *s; |
| 2277 | struct linetable *l; |
| 2278 | int len; |
| 2279 | int i; |
| 2280 | struct linetable_entry *item; |
| 2281 | struct symtab_and_line val; |
| 2282 | const struct blockvector *bv; |
| 2283 | struct bound_minimal_symbol msymbol; |
| 2284 | struct objfile *objfile; |
| 2285 | |
| 2286 | /* Info on best line seen so far, and where it starts, and its file. */ |
| 2287 | |
| 2288 | struct linetable_entry *best = NULL; |
| 2289 | CORE_ADDR best_end = 0; |
| 2290 | struct symtab *best_symtab = 0; |
| 2291 | |
| 2292 | /* Store here the first line number |
| 2293 | of a file which contains the line at the smallest pc after PC. |
| 2294 | If we don't find a line whose range contains PC, |
| 2295 | we will use a line one less than this, |
| 2296 | with a range from the start of that file to the first line's pc. */ |
| 2297 | struct linetable_entry *alt = NULL; |
| 2298 | |
| 2299 | /* Info on best line seen in this file. */ |
| 2300 | |
| 2301 | struct linetable_entry *prev; |
| 2302 | |
| 2303 | /* If this pc is not from the current frame, |
| 2304 | it is the address of the end of a call instruction. |
| 2305 | Quite likely that is the start of the following statement. |
| 2306 | But what we want is the statement containing the instruction. |
| 2307 | Fudge the pc to make sure we get that. */ |
| 2308 | |
| 2309 | init_sal (&val); /* initialize to zeroes */ |
| 2310 | |
| 2311 | val.pspace = current_program_space; |
| 2312 | |
| 2313 | /* It's tempting to assume that, if we can't find debugging info for |
| 2314 | any function enclosing PC, that we shouldn't search for line |
| 2315 | number info, either. However, GAS can emit line number info for |
| 2316 | assembly files --- very helpful when debugging hand-written |
| 2317 | assembly code. In such a case, we'd have no debug info for the |
| 2318 | function, but we would have line info. */ |
| 2319 | |
| 2320 | if (notcurrent) |
| 2321 | pc -= 1; |
| 2322 | |
| 2323 | /* elz: added this because this function returned the wrong |
| 2324 | information if the pc belongs to a stub (import/export) |
| 2325 | to call a shlib function. This stub would be anywhere between |
| 2326 | two functions in the target, and the line info was erroneously |
| 2327 | taken to be the one of the line before the pc. */ |
| 2328 | |
| 2329 | /* RT: Further explanation: |
| 2330 | |
| 2331 | * We have stubs (trampolines) inserted between procedures. |
| 2332 | * |
| 2333 | * Example: "shr1" exists in a shared library, and a "shr1" stub also |
| 2334 | * exists in the main image. |
| 2335 | * |
| 2336 | * In the minimal symbol table, we have a bunch of symbols |
| 2337 | * sorted by start address. The stubs are marked as "trampoline", |
| 2338 | * the others appear as text. E.g.: |
| 2339 | * |
| 2340 | * Minimal symbol table for main image |
| 2341 | * main: code for main (text symbol) |
| 2342 | * shr1: stub (trampoline symbol) |
| 2343 | * foo: code for foo (text symbol) |
| 2344 | * ... |
| 2345 | * Minimal symbol table for "shr1" image: |
| 2346 | * ... |
| 2347 | * shr1: code for shr1 (text symbol) |
| 2348 | * ... |
| 2349 | * |
| 2350 | * So the code below is trying to detect if we are in the stub |
| 2351 | * ("shr1" stub), and if so, find the real code ("shr1" trampoline), |
| 2352 | * and if found, do the symbolization from the real-code address |
| 2353 | * rather than the stub address. |
| 2354 | * |
| 2355 | * Assumptions being made about the minimal symbol table: |
| 2356 | * 1. lookup_minimal_symbol_by_pc() will return a trampoline only |
| 2357 | * if we're really in the trampoline.s If we're beyond it (say |
| 2358 | * we're in "foo" in the above example), it'll have a closer |
| 2359 | * symbol (the "foo" text symbol for example) and will not |
| 2360 | * return the trampoline. |
| 2361 | * 2. lookup_minimal_symbol_text() will find a real text symbol |
| 2362 | * corresponding to the trampoline, and whose address will |
| 2363 | * be different than the trampoline address. I put in a sanity |
| 2364 | * check for the address being the same, to avoid an |
| 2365 | * infinite recursion. |
| 2366 | */ |
| 2367 | msymbol = lookup_minimal_symbol_by_pc (pc); |
| 2368 | if (msymbol.minsym != NULL) |
| 2369 | if (MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline) |
| 2370 | { |
| 2371 | struct bound_minimal_symbol mfunsym |
| 2372 | = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol.minsym), |
| 2373 | NULL); |
| 2374 | |
| 2375 | if (mfunsym.minsym == NULL) |
| 2376 | /* I eliminated this warning since it is coming out |
| 2377 | * in the following situation: |
| 2378 | * gdb shmain // test program with shared libraries |
| 2379 | * (gdb) break shr1 // function in shared lib |
| 2380 | * Warning: In stub for ... |
| 2381 | * In the above situation, the shared lib is not loaded yet, |
| 2382 | * so of course we can't find the real func/line info, |
| 2383 | * but the "break" still works, and the warning is annoying. |
| 2384 | * So I commented out the warning. RT */ |
| 2385 | /* warning ("In stub for %s; unable to find real function/line info", |
| 2386 | SYMBOL_LINKAGE_NAME (msymbol)); */ |
| 2387 | ; |
| 2388 | /* fall through */ |
| 2389 | else if (BMSYMBOL_VALUE_ADDRESS (mfunsym) |
| 2390 | == BMSYMBOL_VALUE_ADDRESS (msymbol)) |
| 2391 | /* Avoid infinite recursion */ |
| 2392 | /* See above comment about why warning is commented out. */ |
| 2393 | /* warning ("In stub for %s; unable to find real function/line info", |
| 2394 | SYMBOL_LINKAGE_NAME (msymbol)); */ |
| 2395 | ; |
| 2396 | /* fall through */ |
| 2397 | else |
| 2398 | return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0); |
| 2399 | } |
| 2400 | |
| 2401 | |
| 2402 | s = find_pc_sect_symtab (pc, section); |
| 2403 | if (!s) |
| 2404 | { |
| 2405 | /* If no symbol information, return previous pc. */ |
| 2406 | if (notcurrent) |
| 2407 | pc++; |
| 2408 | val.pc = pc; |
| 2409 | return val; |
| 2410 | } |
| 2411 | |
| 2412 | bv = BLOCKVECTOR (s); |
| 2413 | objfile = s->objfile; |
| 2414 | |
| 2415 | /* Look at all the symtabs that share this blockvector. |
| 2416 | They all have the same apriori range, that we found was right; |
| 2417 | but they have different line tables. */ |
| 2418 | |
| 2419 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 2420 | { |
| 2421 | if (BLOCKVECTOR (s) != bv) |
| 2422 | continue; |
| 2423 | |
| 2424 | /* Find the best line in this symtab. */ |
| 2425 | l = LINETABLE (s); |
| 2426 | if (!l) |
| 2427 | continue; |
| 2428 | len = l->nitems; |
| 2429 | if (len <= 0) |
| 2430 | { |
| 2431 | /* I think len can be zero if the symtab lacks line numbers |
| 2432 | (e.g. gcc -g1). (Either that or the LINETABLE is NULL; |
| 2433 | I'm not sure which, and maybe it depends on the symbol |
| 2434 | reader). */ |
| 2435 | continue; |
| 2436 | } |
| 2437 | |
| 2438 | prev = NULL; |
| 2439 | item = l->item; /* Get first line info. */ |
| 2440 | |
| 2441 | /* Is this file's first line closer than the first lines of other files? |
| 2442 | If so, record this file, and its first line, as best alternate. */ |
| 2443 | if (item->pc > pc && (!alt || item->pc < alt->pc)) |
| 2444 | alt = item; |
| 2445 | |
| 2446 | for (i = 0; i < len; i++, item++) |
| 2447 | { |
| 2448 | /* Leave prev pointing to the linetable entry for the last line |
| 2449 | that started at or before PC. */ |
| 2450 | if (item->pc > pc) |
| 2451 | break; |
| 2452 | |
| 2453 | prev = item; |
| 2454 | } |
| 2455 | |
| 2456 | /* At this point, prev points at the line whose start addr is <= pc, and |
| 2457 | item points at the next line. If we ran off the end of the linetable |
| 2458 | (pc >= start of the last line), then prev == item. If pc < start of |
| 2459 | the first line, prev will not be set. */ |
| 2460 | |
| 2461 | /* Is this file's best line closer than the best in the other files? |
| 2462 | If so, record this file, and its best line, as best so far. Don't |
| 2463 | save prev if it represents the end of a function (i.e. line number |
| 2464 | 0) instead of a real line. */ |
| 2465 | |
| 2466 | if (prev && prev->line && (!best || prev->pc > best->pc)) |
| 2467 | { |
| 2468 | best = prev; |
| 2469 | best_symtab = s; |
| 2470 | |
| 2471 | /* Discard BEST_END if it's before the PC of the current BEST. */ |
| 2472 | if (best_end <= best->pc) |
| 2473 | best_end = 0; |
| 2474 | } |
| 2475 | |
| 2476 | /* If another line (denoted by ITEM) is in the linetable and its |
| 2477 | PC is after BEST's PC, but before the current BEST_END, then |
| 2478 | use ITEM's PC as the new best_end. */ |
| 2479 | if (best && i < len && item->pc > best->pc |
| 2480 | && (best_end == 0 || best_end > item->pc)) |
| 2481 | best_end = item->pc; |
| 2482 | } |
| 2483 | |
| 2484 | if (!best_symtab) |
| 2485 | { |
| 2486 | /* If we didn't find any line number info, just return zeros. |
| 2487 | We used to return alt->line - 1 here, but that could be |
| 2488 | anywhere; if we don't have line number info for this PC, |
| 2489 | don't make some up. */ |
| 2490 | val.pc = pc; |
| 2491 | } |
| 2492 | else if (best->line == 0) |
| 2493 | { |
| 2494 | /* If our best fit is in a range of PC's for which no line |
| 2495 | number info is available (line number is zero) then we didn't |
| 2496 | find any valid line information. */ |
| 2497 | val.pc = pc; |
| 2498 | } |
| 2499 | else |
| 2500 | { |
| 2501 | val.symtab = best_symtab; |
| 2502 | val.line = best->line; |
| 2503 | val.pc = best->pc; |
| 2504 | if (best_end && (!alt || best_end < alt->pc)) |
| 2505 | val.end = best_end; |
| 2506 | else if (alt) |
| 2507 | val.end = alt->pc; |
| 2508 | else |
| 2509 | val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); |
| 2510 | } |
| 2511 | val.section = section; |
| 2512 | return val; |
| 2513 | } |
| 2514 | |
| 2515 | /* Backward compatibility (no section). */ |
| 2516 | |
| 2517 | struct symtab_and_line |
| 2518 | find_pc_line (CORE_ADDR pc, int notcurrent) |
| 2519 | { |
| 2520 | struct obj_section *section; |
| 2521 | |
| 2522 | section = find_pc_overlay (pc); |
| 2523 | if (pc_in_unmapped_range (pc, section)) |
| 2524 | pc = overlay_mapped_address (pc, section); |
| 2525 | return find_pc_sect_line (pc, section, notcurrent); |
| 2526 | } |
| 2527 | \f |
| 2528 | /* Find line number LINE in any symtab whose name is the same as |
| 2529 | SYMTAB. |
| 2530 | |
| 2531 | If found, return the symtab that contains the linetable in which it was |
| 2532 | found, set *INDEX to the index in the linetable of the best entry |
| 2533 | found, and set *EXACT_MATCH nonzero if the value returned is an |
| 2534 | exact match. |
| 2535 | |
| 2536 | If not found, return NULL. */ |
| 2537 | |
| 2538 | struct symtab * |
| 2539 | find_line_symtab (struct symtab *symtab, int line, |
| 2540 | int *index, int *exact_match) |
| 2541 | { |
| 2542 | int exact = 0; /* Initialized here to avoid a compiler warning. */ |
| 2543 | |
| 2544 | /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE |
| 2545 | so far seen. */ |
| 2546 | |
| 2547 | int best_index; |
| 2548 | struct linetable *best_linetable; |
| 2549 | struct symtab *best_symtab; |
| 2550 | |
| 2551 | /* First try looking it up in the given symtab. */ |
| 2552 | best_linetable = LINETABLE (symtab); |
| 2553 | best_symtab = symtab; |
| 2554 | best_index = find_line_common (best_linetable, line, &exact, 0); |
| 2555 | if (best_index < 0 || !exact) |
| 2556 | { |
| 2557 | /* Didn't find an exact match. So we better keep looking for |
| 2558 | another symtab with the same name. In the case of xcoff, |
| 2559 | multiple csects for one source file (produced by IBM's FORTRAN |
| 2560 | compiler) produce multiple symtabs (this is unavoidable |
| 2561 | assuming csects can be at arbitrary places in memory and that |
| 2562 | the GLOBAL_BLOCK of a symtab has a begin and end address). */ |
| 2563 | |
| 2564 | /* BEST is the smallest linenumber > LINE so far seen, |
| 2565 | or 0 if none has been seen so far. |
| 2566 | BEST_INDEX and BEST_LINETABLE identify the item for it. */ |
| 2567 | int best; |
| 2568 | |
| 2569 | struct objfile *objfile; |
| 2570 | struct symtab *s; |
| 2571 | |
| 2572 | if (best_index >= 0) |
| 2573 | best = best_linetable->item[best_index].line; |
| 2574 | else |
| 2575 | best = 0; |
| 2576 | |
| 2577 | ALL_OBJFILES (objfile) |
| 2578 | { |
| 2579 | if (objfile->sf) |
| 2580 | objfile->sf->qf->expand_symtabs_with_fullname (objfile, |
| 2581 | symtab_to_fullname (symtab)); |
| 2582 | } |
| 2583 | |
| 2584 | ALL_SYMTABS (objfile, s) |
| 2585 | { |
| 2586 | struct linetable *l; |
| 2587 | int ind; |
| 2588 | |
| 2589 | if (FILENAME_CMP (symtab->filename, s->filename) != 0) |
| 2590 | continue; |
| 2591 | if (FILENAME_CMP (symtab_to_fullname (symtab), |
| 2592 | symtab_to_fullname (s)) != 0) |
| 2593 | continue; |
| 2594 | l = LINETABLE (s); |
| 2595 | ind = find_line_common (l, line, &exact, 0); |
| 2596 | if (ind >= 0) |
| 2597 | { |
| 2598 | if (exact) |
| 2599 | { |
| 2600 | best_index = ind; |
| 2601 | best_linetable = l; |
| 2602 | best_symtab = s; |
| 2603 | goto done; |
| 2604 | } |
| 2605 | if (best == 0 || l->item[ind].line < best) |
| 2606 | { |
| 2607 | best = l->item[ind].line; |
| 2608 | best_index = ind; |
| 2609 | best_linetable = l; |
| 2610 | best_symtab = s; |
| 2611 | } |
| 2612 | } |
| 2613 | } |
| 2614 | } |
| 2615 | done: |
| 2616 | if (best_index < 0) |
| 2617 | return NULL; |
| 2618 | |
| 2619 | if (index) |
| 2620 | *index = best_index; |
| 2621 | if (exact_match) |
| 2622 | *exact_match = exact; |
| 2623 | |
| 2624 | return best_symtab; |
| 2625 | } |
| 2626 | |
| 2627 | /* Given SYMTAB, returns all the PCs function in the symtab that |
| 2628 | exactly match LINE. Returns NULL if there are no exact matches, |
| 2629 | but updates BEST_ITEM in this case. */ |
| 2630 | |
| 2631 | VEC (CORE_ADDR) * |
| 2632 | find_pcs_for_symtab_line (struct symtab *symtab, int line, |
| 2633 | struct linetable_entry **best_item) |
| 2634 | { |
| 2635 | int start = 0; |
| 2636 | VEC (CORE_ADDR) *result = NULL; |
| 2637 | |
| 2638 | /* First, collect all the PCs that are at this line. */ |
| 2639 | while (1) |
| 2640 | { |
| 2641 | int was_exact; |
| 2642 | int idx; |
| 2643 | |
| 2644 | idx = find_line_common (LINETABLE (symtab), line, &was_exact, start); |
| 2645 | if (idx < 0) |
| 2646 | break; |
| 2647 | |
| 2648 | if (!was_exact) |
| 2649 | { |
| 2650 | struct linetable_entry *item = &LINETABLE (symtab)->item[idx]; |
| 2651 | |
| 2652 | if (*best_item == NULL || item->line < (*best_item)->line) |
| 2653 | *best_item = item; |
| 2654 | |
| 2655 | break; |
| 2656 | } |
| 2657 | |
| 2658 | VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc); |
| 2659 | start = idx + 1; |
| 2660 | } |
| 2661 | |
| 2662 | return result; |
| 2663 | } |
| 2664 | |
| 2665 | \f |
| 2666 | /* Set the PC value for a given source file and line number and return true. |
| 2667 | Returns zero for invalid line number (and sets the PC to 0). |
| 2668 | The source file is specified with a struct symtab. */ |
| 2669 | |
| 2670 | int |
| 2671 | find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc) |
| 2672 | { |
| 2673 | struct linetable *l; |
| 2674 | int ind; |
| 2675 | |
| 2676 | *pc = 0; |
| 2677 | if (symtab == 0) |
| 2678 | return 0; |
| 2679 | |
| 2680 | symtab = find_line_symtab (symtab, line, &ind, NULL); |
| 2681 | if (symtab != NULL) |
| 2682 | { |
| 2683 | l = LINETABLE (symtab); |
| 2684 | *pc = l->item[ind].pc; |
| 2685 | return 1; |
| 2686 | } |
| 2687 | else |
| 2688 | return 0; |
| 2689 | } |
| 2690 | |
| 2691 | /* Find the range of pc values in a line. |
| 2692 | Store the starting pc of the line into *STARTPTR |
| 2693 | and the ending pc (start of next line) into *ENDPTR. |
| 2694 | Returns 1 to indicate success. |
| 2695 | Returns 0 if could not find the specified line. */ |
| 2696 | |
| 2697 | int |
| 2698 | find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr, |
| 2699 | CORE_ADDR *endptr) |
| 2700 | { |
| 2701 | CORE_ADDR startaddr; |
| 2702 | struct symtab_and_line found_sal; |
| 2703 | |
| 2704 | startaddr = sal.pc; |
| 2705 | if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr)) |
| 2706 | return 0; |
| 2707 | |
| 2708 | /* This whole function is based on address. For example, if line 10 has |
| 2709 | two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then |
| 2710 | "info line *0x123" should say the line goes from 0x100 to 0x200 |
| 2711 | and "info line *0x355" should say the line goes from 0x300 to 0x400. |
| 2712 | This also insures that we never give a range like "starts at 0x134 |
| 2713 | and ends at 0x12c". */ |
| 2714 | |
| 2715 | found_sal = find_pc_sect_line (startaddr, sal.section, 0); |
| 2716 | if (found_sal.line != sal.line) |
| 2717 | { |
| 2718 | /* The specified line (sal) has zero bytes. */ |
| 2719 | *startptr = found_sal.pc; |
| 2720 | *endptr = found_sal.pc; |
| 2721 | } |
| 2722 | else |
| 2723 | { |
| 2724 | *startptr = found_sal.pc; |
| 2725 | *endptr = found_sal.end; |
| 2726 | } |
| 2727 | return 1; |
| 2728 | } |
| 2729 | |
| 2730 | /* Given a line table and a line number, return the index into the line |
| 2731 | table for the pc of the nearest line whose number is >= the specified one. |
| 2732 | Return -1 if none is found. The value is >= 0 if it is an index. |
| 2733 | START is the index at which to start searching the line table. |
| 2734 | |
| 2735 | Set *EXACT_MATCH nonzero if the value returned is an exact match. */ |
| 2736 | |
| 2737 | static int |
| 2738 | find_line_common (struct linetable *l, int lineno, |
| 2739 | int *exact_match, int start) |
| 2740 | { |
| 2741 | int i; |
| 2742 | int len; |
| 2743 | |
| 2744 | /* BEST is the smallest linenumber > LINENO so far seen, |
| 2745 | or 0 if none has been seen so far. |
| 2746 | BEST_INDEX identifies the item for it. */ |
| 2747 | |
| 2748 | int best_index = -1; |
| 2749 | int best = 0; |
| 2750 | |
| 2751 | *exact_match = 0; |
| 2752 | |
| 2753 | if (lineno <= 0) |
| 2754 | return -1; |
| 2755 | if (l == 0) |
| 2756 | return -1; |
| 2757 | |
| 2758 | len = l->nitems; |
| 2759 | for (i = start; i < len; i++) |
| 2760 | { |
| 2761 | struct linetable_entry *item = &(l->item[i]); |
| 2762 | |
| 2763 | if (item->line == lineno) |
| 2764 | { |
| 2765 | /* Return the first (lowest address) entry which matches. */ |
| 2766 | *exact_match = 1; |
| 2767 | return i; |
| 2768 | } |
| 2769 | |
| 2770 | if (item->line > lineno && (best == 0 || item->line < best)) |
| 2771 | { |
| 2772 | best = item->line; |
| 2773 | best_index = i; |
| 2774 | } |
| 2775 | } |
| 2776 | |
| 2777 | /* If we got here, we didn't get an exact match. */ |
| 2778 | return best_index; |
| 2779 | } |
| 2780 | |
| 2781 | int |
| 2782 | find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr) |
| 2783 | { |
| 2784 | struct symtab_and_line sal; |
| 2785 | |
| 2786 | sal = find_pc_line (pc, 0); |
| 2787 | *startptr = sal.pc; |
| 2788 | *endptr = sal.end; |
| 2789 | return sal.symtab != 0; |
| 2790 | } |
| 2791 | |
| 2792 | /* Given a function start address FUNC_ADDR and SYMTAB, find the first |
| 2793 | address for that function that has an entry in SYMTAB's line info |
| 2794 | table. If such an entry cannot be found, return FUNC_ADDR |
| 2795 | unaltered. */ |
| 2796 | |
| 2797 | static CORE_ADDR |
| 2798 | skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab) |
| 2799 | { |
| 2800 | CORE_ADDR func_start, func_end; |
| 2801 | struct linetable *l; |
| 2802 | int i; |
| 2803 | |
| 2804 | /* Give up if this symbol has no lineinfo table. */ |
| 2805 | l = LINETABLE (symtab); |
| 2806 | if (l == NULL) |
| 2807 | return func_addr; |
| 2808 | |
| 2809 | /* Get the range for the function's PC values, or give up if we |
| 2810 | cannot, for some reason. */ |
| 2811 | if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end)) |
| 2812 | return func_addr; |
| 2813 | |
| 2814 | /* Linetable entries are ordered by PC values, see the commentary in |
| 2815 | symtab.h where `struct linetable' is defined. Thus, the first |
| 2816 | entry whose PC is in the range [FUNC_START..FUNC_END[ is the |
| 2817 | address we are looking for. */ |
| 2818 | for (i = 0; i < l->nitems; i++) |
| 2819 | { |
| 2820 | struct linetable_entry *item = &(l->item[i]); |
| 2821 | |
| 2822 | /* Don't use line numbers of zero, they mark special entries in |
| 2823 | the table. See the commentary on symtab.h before the |
| 2824 | definition of struct linetable. */ |
| 2825 | if (item->line > 0 && func_start <= item->pc && item->pc < func_end) |
| 2826 | return item->pc; |
| 2827 | } |
| 2828 | |
| 2829 | return func_addr; |
| 2830 | } |
| 2831 | |
| 2832 | /* Given a function symbol SYM, find the symtab and line for the start |
| 2833 | of the function. |
| 2834 | If the argument FUNFIRSTLINE is nonzero, we want the first line |
| 2835 | of real code inside the function. */ |
| 2836 | |
| 2837 | struct symtab_and_line |
| 2838 | find_function_start_sal (struct symbol *sym, int funfirstline) |
| 2839 | { |
| 2840 | struct symtab_and_line sal; |
| 2841 | |
| 2842 | fixup_symbol_section (sym, NULL); |
| 2843 | sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)), |
| 2844 | SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym), sym), 0); |
| 2845 | |
| 2846 | /* We always should have a line for the function start address. |
| 2847 | If we don't, something is odd. Create a plain SAL refering |
| 2848 | just the PC and hope that skip_prologue_sal (if requested) |
| 2849 | can find a line number for after the prologue. */ |
| 2850 | if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym))) |
| 2851 | { |
| 2852 | init_sal (&sal); |
| 2853 | sal.pspace = current_program_space; |
| 2854 | sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 2855 | sal.section = SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym), sym); |
| 2856 | } |
| 2857 | |
| 2858 | if (funfirstline) |
| 2859 | skip_prologue_sal (&sal); |
| 2860 | |
| 2861 | return sal; |
| 2862 | } |
| 2863 | |
| 2864 | /* Adjust SAL to the first instruction past the function prologue. |
| 2865 | If the PC was explicitly specified, the SAL is not changed. |
| 2866 | If the line number was explicitly specified, at most the SAL's PC |
| 2867 | is updated. If SAL is already past the prologue, then do nothing. */ |
| 2868 | |
| 2869 | void |
| 2870 | skip_prologue_sal (struct symtab_and_line *sal) |
| 2871 | { |
| 2872 | struct symbol *sym; |
| 2873 | struct symtab_and_line start_sal; |
| 2874 | struct cleanup *old_chain; |
| 2875 | CORE_ADDR pc, saved_pc; |
| 2876 | struct obj_section *section; |
| 2877 | const char *name; |
| 2878 | struct objfile *objfile; |
| 2879 | struct gdbarch *gdbarch; |
| 2880 | const struct block *b, *function_block; |
| 2881 | int force_skip, skip; |
| 2882 | |
| 2883 | /* Do not change the SAL if PC was specified explicitly. */ |
| 2884 | if (sal->explicit_pc) |
| 2885 | return; |
| 2886 | |
| 2887 | old_chain = save_current_space_and_thread (); |
| 2888 | switch_to_program_space_and_thread (sal->pspace); |
| 2889 | |
| 2890 | sym = find_pc_sect_function (sal->pc, sal->section); |
| 2891 | if (sym != NULL) |
| 2892 | { |
| 2893 | fixup_symbol_section (sym, NULL); |
| 2894 | |
| 2895 | pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 2896 | section = SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym), sym); |
| 2897 | name = SYMBOL_LINKAGE_NAME (sym); |
| 2898 | objfile = SYMBOL_SYMTAB (sym)->objfile; |
| 2899 | } |
| 2900 | else |
| 2901 | { |
| 2902 | struct bound_minimal_symbol msymbol |
| 2903 | = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section); |
| 2904 | |
| 2905 | if (msymbol.minsym == NULL) |
| 2906 | { |
| 2907 | do_cleanups (old_chain); |
| 2908 | return; |
| 2909 | } |
| 2910 | |
| 2911 | objfile = msymbol.objfile; |
| 2912 | pc = BMSYMBOL_VALUE_ADDRESS (msymbol); |
| 2913 | section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym); |
| 2914 | name = MSYMBOL_LINKAGE_NAME (msymbol.minsym); |
| 2915 | } |
| 2916 | |
| 2917 | gdbarch = get_objfile_arch (objfile); |
| 2918 | |
| 2919 | /* Process the prologue in two passes. In the first pass try to skip the |
| 2920 | prologue (SKIP is true) and verify there is a real need for it (indicated |
| 2921 | by FORCE_SKIP). If no such reason was found run a second pass where the |
| 2922 | prologue is not skipped (SKIP is false). */ |
| 2923 | |
| 2924 | skip = 1; |
| 2925 | force_skip = 1; |
| 2926 | |
| 2927 | /* Be conservative - allow direct PC (without skipping prologue) only if we |
| 2928 | have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not |
| 2929 | have to be set by the caller so we use SYM instead. */ |
| 2930 | if (sym && SYMBOL_SYMTAB (sym)->locations_valid) |
| 2931 | force_skip = 0; |
| 2932 | |
| 2933 | saved_pc = pc; |
| 2934 | do |
| 2935 | { |
| 2936 | pc = saved_pc; |
| 2937 | |
| 2938 | /* If the function is in an unmapped overlay, use its unmapped LMA address, |
| 2939 | so that gdbarch_skip_prologue has something unique to work on. */ |
| 2940 | if (section_is_overlay (section) && !section_is_mapped (section)) |
| 2941 | pc = overlay_unmapped_address (pc, section); |
| 2942 | |
| 2943 | /* Skip "first line" of function (which is actually its prologue). */ |
| 2944 | pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 2945 | if (gdbarch_skip_entrypoint_p (gdbarch)) |
| 2946 | pc = gdbarch_skip_entrypoint (gdbarch, pc); |
| 2947 | if (skip) |
| 2948 | pc = gdbarch_skip_prologue (gdbarch, pc); |
| 2949 | |
| 2950 | /* For overlays, map pc back into its mapped VMA range. */ |
| 2951 | pc = overlay_mapped_address (pc, section); |
| 2952 | |
| 2953 | /* Calculate line number. */ |
| 2954 | start_sal = find_pc_sect_line (pc, section, 0); |
| 2955 | |
| 2956 | /* Check if gdbarch_skip_prologue left us in mid-line, and the next |
| 2957 | line is still part of the same function. */ |
| 2958 | if (skip && start_sal.pc != pc |
| 2959 | && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end |
| 2960 | && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym))) |
| 2961 | : (lookup_minimal_symbol_by_pc_section (start_sal.end, section).minsym |
| 2962 | == lookup_minimal_symbol_by_pc_section (pc, section).minsym))) |
| 2963 | { |
| 2964 | /* First pc of next line */ |
| 2965 | pc = start_sal.end; |
| 2966 | /* Recalculate the line number (might not be N+1). */ |
| 2967 | start_sal = find_pc_sect_line (pc, section, 0); |
| 2968 | } |
| 2969 | |
| 2970 | /* On targets with executable formats that don't have a concept of |
| 2971 | constructors (ELF with .init has, PE doesn't), gcc emits a call |
| 2972 | to `__main' in `main' between the prologue and before user |
| 2973 | code. */ |
| 2974 | if (gdbarch_skip_main_prologue_p (gdbarch) |
| 2975 | && name && strcmp_iw (name, "main") == 0) |
| 2976 | { |
| 2977 | pc = gdbarch_skip_main_prologue (gdbarch, pc); |
| 2978 | /* Recalculate the line number (might not be N+1). */ |
| 2979 | start_sal = find_pc_sect_line (pc, section, 0); |
| 2980 | force_skip = 1; |
| 2981 | } |
| 2982 | } |
| 2983 | while (!force_skip && skip--); |
| 2984 | |
| 2985 | /* If we still don't have a valid source line, try to find the first |
| 2986 | PC in the lineinfo table that belongs to the same function. This |
| 2987 | happens with COFF debug info, which does not seem to have an |
| 2988 | entry in lineinfo table for the code after the prologue which has |
| 2989 | no direct relation to source. For example, this was found to be |
| 2990 | the case with the DJGPP target using "gcc -gcoff" when the |
| 2991 | compiler inserted code after the prologue to make sure the stack |
| 2992 | is aligned. */ |
| 2993 | if (!force_skip && sym && start_sal.symtab == NULL) |
| 2994 | { |
| 2995 | pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym)); |
| 2996 | /* Recalculate the line number. */ |
| 2997 | start_sal = find_pc_sect_line (pc, section, 0); |
| 2998 | } |
| 2999 | |
| 3000 | do_cleanups (old_chain); |
| 3001 | |
| 3002 | /* If we're already past the prologue, leave SAL unchanged. Otherwise |
| 3003 | forward SAL to the end of the prologue. */ |
| 3004 | if (sal->pc >= pc) |
| 3005 | return; |
| 3006 | |
| 3007 | sal->pc = pc; |
| 3008 | sal->section = section; |
| 3009 | |
| 3010 | /* Unless the explicit_line flag was set, update the SAL line |
| 3011 | and symtab to correspond to the modified PC location. */ |
| 3012 | if (sal->explicit_line) |
| 3013 | return; |
| 3014 | |
| 3015 | sal->symtab = start_sal.symtab; |
| 3016 | sal->line = start_sal.line; |
| 3017 | sal->end = start_sal.end; |
| 3018 | |
| 3019 | /* Check if we are now inside an inlined function. If we can, |
| 3020 | use the call site of the function instead. */ |
| 3021 | b = block_for_pc_sect (sal->pc, sal->section); |
| 3022 | function_block = NULL; |
| 3023 | while (b != NULL) |
| 3024 | { |
| 3025 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 3026 | function_block = b; |
| 3027 | else if (BLOCK_FUNCTION (b) != NULL) |
| 3028 | break; |
| 3029 | b = BLOCK_SUPERBLOCK (b); |
| 3030 | } |
| 3031 | if (function_block != NULL |
| 3032 | && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0) |
| 3033 | { |
| 3034 | sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block)); |
| 3035 | sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block)); |
| 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | /* If P is of the form "operator[ \t]+..." where `...' is |
| 3040 | some legitimate operator text, return a pointer to the |
| 3041 | beginning of the substring of the operator text. |
| 3042 | Otherwise, return "". */ |
| 3043 | |
| 3044 | static char * |
| 3045 | operator_chars (char *p, char **end) |
| 3046 | { |
| 3047 | *end = ""; |
| 3048 | if (strncmp (p, "operator", 8)) |
| 3049 | return *end; |
| 3050 | p += 8; |
| 3051 | |
| 3052 | /* Don't get faked out by `operator' being part of a longer |
| 3053 | identifier. */ |
| 3054 | if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0') |
| 3055 | return *end; |
| 3056 | |
| 3057 | /* Allow some whitespace between `operator' and the operator symbol. */ |
| 3058 | while (*p == ' ' || *p == '\t') |
| 3059 | p++; |
| 3060 | |
| 3061 | /* Recognize 'operator TYPENAME'. */ |
| 3062 | |
| 3063 | if (isalpha (*p) || *p == '_' || *p == '$') |
| 3064 | { |
| 3065 | char *q = p + 1; |
| 3066 | |
| 3067 | while (isalnum (*q) || *q == '_' || *q == '$') |
| 3068 | q++; |
| 3069 | *end = q; |
| 3070 | return p; |
| 3071 | } |
| 3072 | |
| 3073 | while (*p) |
| 3074 | switch (*p) |
| 3075 | { |
| 3076 | case '\\': /* regexp quoting */ |
| 3077 | if (p[1] == '*') |
| 3078 | { |
| 3079 | if (p[2] == '=') /* 'operator\*=' */ |
| 3080 | *end = p + 3; |
| 3081 | else /* 'operator\*' */ |
| 3082 | *end = p + 2; |
| 3083 | return p; |
| 3084 | } |
| 3085 | else if (p[1] == '[') |
| 3086 | { |
| 3087 | if (p[2] == ']') |
| 3088 | error (_("mismatched quoting on brackets, " |
| 3089 | "try 'operator\\[\\]'")); |
| 3090 | else if (p[2] == '\\' && p[3] == ']') |
| 3091 | { |
| 3092 | *end = p + 4; /* 'operator\[\]' */ |
| 3093 | return p; |
| 3094 | } |
| 3095 | else |
| 3096 | error (_("nothing is allowed between '[' and ']'")); |
| 3097 | } |
| 3098 | else |
| 3099 | { |
| 3100 | /* Gratuitous qoute: skip it and move on. */ |
| 3101 | p++; |
| 3102 | continue; |
| 3103 | } |
| 3104 | break; |
| 3105 | case '!': |
| 3106 | case '=': |
| 3107 | case '*': |
| 3108 | case '/': |
| 3109 | case '%': |
| 3110 | case '^': |
| 3111 | if (p[1] == '=') |
| 3112 | *end = p + 2; |
| 3113 | else |
| 3114 | *end = p + 1; |
| 3115 | return p; |
| 3116 | case '<': |
| 3117 | case '>': |
| 3118 | case '+': |
| 3119 | case '-': |
| 3120 | case '&': |
| 3121 | case '|': |
| 3122 | if (p[0] == '-' && p[1] == '>') |
| 3123 | { |
| 3124 | /* Struct pointer member operator 'operator->'. */ |
| 3125 | if (p[2] == '*') |
| 3126 | { |
| 3127 | *end = p + 3; /* 'operator->*' */ |
| 3128 | return p; |
| 3129 | } |
| 3130 | else if (p[2] == '\\') |
| 3131 | { |
| 3132 | *end = p + 4; /* Hopefully 'operator->\*' */ |
| 3133 | return p; |
| 3134 | } |
| 3135 | else |
| 3136 | { |
| 3137 | *end = p + 2; /* 'operator->' */ |
| 3138 | return p; |
| 3139 | } |
| 3140 | } |
| 3141 | if (p[1] == '=' || p[1] == p[0]) |
| 3142 | *end = p + 2; |
| 3143 | else |
| 3144 | *end = p + 1; |
| 3145 | return p; |
| 3146 | case '~': |
| 3147 | case ',': |
| 3148 | *end = p + 1; |
| 3149 | return p; |
| 3150 | case '(': |
| 3151 | if (p[1] != ')') |
| 3152 | error (_("`operator ()' must be specified " |
| 3153 | "without whitespace in `()'")); |
| 3154 | *end = p + 2; |
| 3155 | return p; |
| 3156 | case '?': |
| 3157 | if (p[1] != ':') |
| 3158 | error (_("`operator ?:' must be specified " |
| 3159 | "without whitespace in `?:'")); |
| 3160 | *end = p + 2; |
| 3161 | return p; |
| 3162 | case '[': |
| 3163 | if (p[1] != ']') |
| 3164 | error (_("`operator []' must be specified " |
| 3165 | "without whitespace in `[]'")); |
| 3166 | *end = p + 2; |
| 3167 | return p; |
| 3168 | default: |
| 3169 | error (_("`operator %s' not supported"), p); |
| 3170 | break; |
| 3171 | } |
| 3172 | |
| 3173 | *end = ""; |
| 3174 | return *end; |
| 3175 | } |
| 3176 | \f |
| 3177 | |
| 3178 | /* Cache to watch for file names already seen by filename_seen. */ |
| 3179 | |
| 3180 | struct filename_seen_cache |
| 3181 | { |
| 3182 | /* Table of files seen so far. */ |
| 3183 | htab_t tab; |
| 3184 | /* Initial size of the table. It automagically grows from here. */ |
| 3185 | #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100 |
| 3186 | }; |
| 3187 | |
| 3188 | /* filename_seen_cache constructor. */ |
| 3189 | |
| 3190 | static struct filename_seen_cache * |
| 3191 | create_filename_seen_cache (void) |
| 3192 | { |
| 3193 | struct filename_seen_cache *cache; |
| 3194 | |
| 3195 | cache = XNEW (struct filename_seen_cache); |
| 3196 | cache->tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE, |
| 3197 | filename_hash, filename_eq, |
| 3198 | NULL, xcalloc, xfree); |
| 3199 | |
| 3200 | return cache; |
| 3201 | } |
| 3202 | |
| 3203 | /* Empty the cache, but do not delete it. */ |
| 3204 | |
| 3205 | static void |
| 3206 | clear_filename_seen_cache (struct filename_seen_cache *cache) |
| 3207 | { |
| 3208 | htab_empty (cache->tab); |
| 3209 | } |
| 3210 | |
| 3211 | /* filename_seen_cache destructor. |
| 3212 | This takes a void * argument as it is generally used as a cleanup. */ |
| 3213 | |
| 3214 | static void |
| 3215 | delete_filename_seen_cache (void *ptr) |
| 3216 | { |
| 3217 | struct filename_seen_cache *cache = ptr; |
| 3218 | |
| 3219 | htab_delete (cache->tab); |
| 3220 | xfree (cache); |
| 3221 | } |
| 3222 | |
| 3223 | /* If FILE is not already in the table of files in CACHE, return zero; |
| 3224 | otherwise return non-zero. Optionally add FILE to the table if ADD |
| 3225 | is non-zero. |
| 3226 | |
| 3227 | NOTE: We don't manage space for FILE, we assume FILE lives as long |
| 3228 | as the caller needs. */ |
| 3229 | |
| 3230 | static int |
| 3231 | filename_seen (struct filename_seen_cache *cache, const char *file, int add) |
| 3232 | { |
| 3233 | void **slot; |
| 3234 | |
| 3235 | /* Is FILE in tab? */ |
| 3236 | slot = htab_find_slot (cache->tab, file, add ? INSERT : NO_INSERT); |
| 3237 | if (*slot != NULL) |
| 3238 | return 1; |
| 3239 | |
| 3240 | /* No; maybe add it to tab. */ |
| 3241 | if (add) |
| 3242 | *slot = (char *) file; |
| 3243 | |
| 3244 | return 0; |
| 3245 | } |
| 3246 | |
| 3247 | /* Data structure to maintain printing state for output_source_filename. */ |
| 3248 | |
| 3249 | struct output_source_filename_data |
| 3250 | { |
| 3251 | /* Cache of what we've seen so far. */ |
| 3252 | struct filename_seen_cache *filename_seen_cache; |
| 3253 | |
| 3254 | /* Flag of whether we're printing the first one. */ |
| 3255 | int first; |
| 3256 | }; |
| 3257 | |
| 3258 | /* Slave routine for sources_info. Force line breaks at ,'s. |
| 3259 | NAME is the name to print. |
| 3260 | DATA contains the state for printing and watching for duplicates. */ |
| 3261 | |
| 3262 | static void |
| 3263 | output_source_filename (const char *name, |
| 3264 | struct output_source_filename_data *data) |
| 3265 | { |
| 3266 | /* Since a single source file can result in several partial symbol |
| 3267 | tables, we need to avoid printing it more than once. Note: if |
| 3268 | some of the psymtabs are read in and some are not, it gets |
| 3269 | printed both under "Source files for which symbols have been |
| 3270 | read" and "Source files for which symbols will be read in on |
| 3271 | demand". I consider this a reasonable way to deal with the |
| 3272 | situation. I'm not sure whether this can also happen for |
| 3273 | symtabs; it doesn't hurt to check. */ |
| 3274 | |
| 3275 | /* Was NAME already seen? */ |
| 3276 | if (filename_seen (data->filename_seen_cache, name, 1)) |
| 3277 | { |
| 3278 | /* Yes; don't print it again. */ |
| 3279 | return; |
| 3280 | } |
| 3281 | |
| 3282 | /* No; print it and reset *FIRST. */ |
| 3283 | if (! data->first) |
| 3284 | printf_filtered (", "); |
| 3285 | data->first = 0; |
| 3286 | |
| 3287 | wrap_here (""); |
| 3288 | fputs_filtered (name, gdb_stdout); |
| 3289 | } |
| 3290 | |
| 3291 | /* A callback for map_partial_symbol_filenames. */ |
| 3292 | |
| 3293 | static void |
| 3294 | output_partial_symbol_filename (const char *filename, const char *fullname, |
| 3295 | void *data) |
| 3296 | { |
| 3297 | output_source_filename (fullname ? fullname : filename, data); |
| 3298 | } |
| 3299 | |
| 3300 | static void |
| 3301 | sources_info (char *ignore, int from_tty) |
| 3302 | { |
| 3303 | struct symtab *s; |
| 3304 | struct objfile *objfile; |
| 3305 | struct output_source_filename_data data; |
| 3306 | struct cleanup *cleanups; |
| 3307 | |
| 3308 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 3309 | { |
| 3310 | error (_("No symbol table is loaded. Use the \"file\" command.")); |
| 3311 | } |
| 3312 | |
| 3313 | data.filename_seen_cache = create_filename_seen_cache (); |
| 3314 | cleanups = make_cleanup (delete_filename_seen_cache, |
| 3315 | data.filename_seen_cache); |
| 3316 | |
| 3317 | printf_filtered ("Source files for which symbols have been read in:\n\n"); |
| 3318 | |
| 3319 | data.first = 1; |
| 3320 | ALL_SYMTABS (objfile, s) |
| 3321 | { |
| 3322 | const char *fullname = symtab_to_fullname (s); |
| 3323 | |
| 3324 | output_source_filename (fullname, &data); |
| 3325 | } |
| 3326 | printf_filtered ("\n\n"); |
| 3327 | |
| 3328 | printf_filtered ("Source files for which symbols " |
| 3329 | "will be read in on demand:\n\n"); |
| 3330 | |
| 3331 | clear_filename_seen_cache (data.filename_seen_cache); |
| 3332 | data.first = 1; |
| 3333 | map_symbol_filenames (output_partial_symbol_filename, &data, |
| 3334 | 1 /*need_fullname*/); |
| 3335 | printf_filtered ("\n"); |
| 3336 | |
| 3337 | do_cleanups (cleanups); |
| 3338 | } |
| 3339 | |
| 3340 | /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is |
| 3341 | non-zero compare only lbasename of FILES. */ |
| 3342 | |
| 3343 | static int |
| 3344 | file_matches (const char *file, char *files[], int nfiles, int basenames) |
| 3345 | { |
| 3346 | int i; |
| 3347 | |
| 3348 | if (file != NULL && nfiles != 0) |
| 3349 | { |
| 3350 | for (i = 0; i < nfiles; i++) |
| 3351 | { |
| 3352 | if (compare_filenames_for_search (file, (basenames |
| 3353 | ? lbasename (files[i]) |
| 3354 | : files[i]))) |
| 3355 | return 1; |
| 3356 | } |
| 3357 | } |
| 3358 | else if (nfiles == 0) |
| 3359 | return 1; |
| 3360 | return 0; |
| 3361 | } |
| 3362 | |
| 3363 | /* Free any memory associated with a search. */ |
| 3364 | |
| 3365 | void |
| 3366 | free_search_symbols (struct symbol_search *symbols) |
| 3367 | { |
| 3368 | struct symbol_search *p; |
| 3369 | struct symbol_search *next; |
| 3370 | |
| 3371 | for (p = symbols; p != NULL; p = next) |
| 3372 | { |
| 3373 | next = p->next; |
| 3374 | xfree (p); |
| 3375 | } |
| 3376 | } |
| 3377 | |
| 3378 | static void |
| 3379 | do_free_search_symbols_cleanup (void *symbolsp) |
| 3380 | { |
| 3381 | struct symbol_search *symbols = *(struct symbol_search **) symbolsp; |
| 3382 | |
| 3383 | free_search_symbols (symbols); |
| 3384 | } |
| 3385 | |
| 3386 | struct cleanup * |
| 3387 | make_cleanup_free_search_symbols (struct symbol_search **symbolsp) |
| 3388 | { |
| 3389 | return make_cleanup (do_free_search_symbols_cleanup, symbolsp); |
| 3390 | } |
| 3391 | |
| 3392 | /* Helper function for sort_search_symbols_remove_dups and qsort. Can only |
| 3393 | sort symbols, not minimal symbols. */ |
| 3394 | |
| 3395 | static int |
| 3396 | compare_search_syms (const void *sa, const void *sb) |
| 3397 | { |
| 3398 | struct symbol_search *sym_a = *(struct symbol_search **) sa; |
| 3399 | struct symbol_search *sym_b = *(struct symbol_search **) sb; |
| 3400 | int c; |
| 3401 | |
| 3402 | c = FILENAME_CMP (sym_a->symtab->filename, sym_b->symtab->filename); |
| 3403 | if (c != 0) |
| 3404 | return c; |
| 3405 | |
| 3406 | if (sym_a->block != sym_b->block) |
| 3407 | return sym_a->block - sym_b->block; |
| 3408 | |
| 3409 | return strcmp (SYMBOL_PRINT_NAME (sym_a->symbol), |
| 3410 | SYMBOL_PRINT_NAME (sym_b->symbol)); |
| 3411 | } |
| 3412 | |
| 3413 | /* Sort the NFOUND symbols in list FOUND and remove duplicates. |
| 3414 | The duplicates are freed, and the new list is returned in |
| 3415 | *NEW_HEAD, *NEW_TAIL. */ |
| 3416 | |
| 3417 | static void |
| 3418 | sort_search_symbols_remove_dups (struct symbol_search *found, int nfound, |
| 3419 | struct symbol_search **new_head, |
| 3420 | struct symbol_search **new_tail) |
| 3421 | { |
| 3422 | struct symbol_search **symbols, *symp, *old_next; |
| 3423 | int i, j, nunique; |
| 3424 | |
| 3425 | gdb_assert (found != NULL && nfound > 0); |
| 3426 | |
| 3427 | /* Build an array out of the list so we can easily sort them. */ |
| 3428 | symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *) |
| 3429 | * nfound); |
| 3430 | symp = found; |
| 3431 | for (i = 0; i < nfound; i++) |
| 3432 | { |
| 3433 | gdb_assert (symp != NULL); |
| 3434 | gdb_assert (symp->block >= 0 && symp->block <= 1); |
| 3435 | symbols[i] = symp; |
| 3436 | symp = symp->next; |
| 3437 | } |
| 3438 | gdb_assert (symp == NULL); |
| 3439 | |
| 3440 | qsort (symbols, nfound, sizeof (struct symbol_search *), |
| 3441 | compare_search_syms); |
| 3442 | |
| 3443 | /* Collapse out the dups. */ |
| 3444 | for (i = 1, j = 1; i < nfound; ++i) |
| 3445 | { |
| 3446 | if (compare_search_syms (&symbols[j - 1], &symbols[i]) != 0) |
| 3447 | symbols[j++] = symbols[i]; |
| 3448 | else |
| 3449 | xfree (symbols[i]); |
| 3450 | } |
| 3451 | nunique = j; |
| 3452 | symbols[j - 1]->next = NULL; |
| 3453 | |
| 3454 | /* Rebuild the linked list. */ |
| 3455 | for (i = 0; i < nunique - 1; i++) |
| 3456 | symbols[i]->next = symbols[i + 1]; |
| 3457 | symbols[nunique - 1]->next = NULL; |
| 3458 | |
| 3459 | *new_head = symbols[0]; |
| 3460 | *new_tail = symbols[nunique - 1]; |
| 3461 | xfree (symbols); |
| 3462 | } |
| 3463 | |
| 3464 | /* An object of this type is passed as the user_data to the |
| 3465 | expand_symtabs_matching method. */ |
| 3466 | struct search_symbols_data |
| 3467 | { |
| 3468 | int nfiles; |
| 3469 | char **files; |
| 3470 | |
| 3471 | /* It is true if PREG contains valid data, false otherwise. */ |
| 3472 | unsigned preg_p : 1; |
| 3473 | regex_t preg; |
| 3474 | }; |
| 3475 | |
| 3476 | /* A callback for expand_symtabs_matching. */ |
| 3477 | |
| 3478 | static int |
| 3479 | search_symbols_file_matches (const char *filename, void *user_data, |
| 3480 | int basenames) |
| 3481 | { |
| 3482 | struct search_symbols_data *data = user_data; |
| 3483 | |
| 3484 | return file_matches (filename, data->files, data->nfiles, basenames); |
| 3485 | } |
| 3486 | |
| 3487 | /* A callback for expand_symtabs_matching. */ |
| 3488 | |
| 3489 | static int |
| 3490 | search_symbols_name_matches (const char *symname, void *user_data) |
| 3491 | { |
| 3492 | struct search_symbols_data *data = user_data; |
| 3493 | |
| 3494 | return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0; |
| 3495 | } |
| 3496 | |
| 3497 | /* Search the symbol table for matches to the regular expression REGEXP, |
| 3498 | returning the results in *MATCHES. |
| 3499 | |
| 3500 | Only symbols of KIND are searched: |
| 3501 | VARIABLES_DOMAIN - search all symbols, excluding functions, type names, |
| 3502 | and constants (enums) |
| 3503 | FUNCTIONS_DOMAIN - search all functions |
| 3504 | TYPES_DOMAIN - search all type names |
| 3505 | ALL_DOMAIN - an internal error for this function |
| 3506 | |
| 3507 | free_search_symbols should be called when *MATCHES is no longer needed. |
| 3508 | |
| 3509 | Within each file the results are sorted locally; each symtab's global and |
| 3510 | static blocks are separately alphabetized. |
| 3511 | Duplicate entries are removed. */ |
| 3512 | |
| 3513 | void |
| 3514 | search_symbols (char *regexp, enum search_domain kind, |
| 3515 | int nfiles, char *files[], |
| 3516 | struct symbol_search **matches) |
| 3517 | { |
| 3518 | struct symtab *s; |
| 3519 | const struct blockvector *bv; |
| 3520 | struct block *b; |
| 3521 | int i = 0; |
| 3522 | struct block_iterator iter; |
| 3523 | struct symbol *sym; |
| 3524 | struct objfile *objfile; |
| 3525 | struct minimal_symbol *msymbol; |
| 3526 | int found_misc = 0; |
| 3527 | static const enum minimal_symbol_type types[] |
| 3528 | = {mst_data, mst_text, mst_abs}; |
| 3529 | static const enum minimal_symbol_type types2[] |
| 3530 | = {mst_bss, mst_file_text, mst_abs}; |
| 3531 | static const enum minimal_symbol_type types3[] |
| 3532 | = {mst_file_data, mst_solib_trampoline, mst_abs}; |
| 3533 | static const enum minimal_symbol_type types4[] |
| 3534 | = {mst_file_bss, mst_text_gnu_ifunc, mst_abs}; |
| 3535 | enum minimal_symbol_type ourtype; |
| 3536 | enum minimal_symbol_type ourtype2; |
| 3537 | enum minimal_symbol_type ourtype3; |
| 3538 | enum minimal_symbol_type ourtype4; |
| 3539 | struct symbol_search *found; |
| 3540 | struct symbol_search *tail; |
| 3541 | struct search_symbols_data datum; |
| 3542 | int nfound; |
| 3543 | |
| 3544 | /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current |
| 3545 | CLEANUP_CHAIN is freed only in the case of an error. */ |
| 3546 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); |
| 3547 | struct cleanup *retval_chain; |
| 3548 | |
| 3549 | gdb_assert (kind <= TYPES_DOMAIN); |
| 3550 | |
| 3551 | ourtype = types[kind]; |
| 3552 | ourtype2 = types2[kind]; |
| 3553 | ourtype3 = types3[kind]; |
| 3554 | ourtype4 = types4[kind]; |
| 3555 | |
| 3556 | *matches = NULL; |
| 3557 | datum.preg_p = 0; |
| 3558 | |
| 3559 | if (regexp != NULL) |
| 3560 | { |
| 3561 | /* Make sure spacing is right for C++ operators. |
| 3562 | This is just a courtesy to make the matching less sensitive |
| 3563 | to how many spaces the user leaves between 'operator' |
| 3564 | and <TYPENAME> or <OPERATOR>. */ |
| 3565 | char *opend; |
| 3566 | char *opname = operator_chars (regexp, &opend); |
| 3567 | int errcode; |
| 3568 | |
| 3569 | if (*opname) |
| 3570 | { |
| 3571 | int fix = -1; /* -1 means ok; otherwise number of |
| 3572 | spaces needed. */ |
| 3573 | |
| 3574 | if (isalpha (*opname) || *opname == '_' || *opname == '$') |
| 3575 | { |
| 3576 | /* There should 1 space between 'operator' and 'TYPENAME'. */ |
| 3577 | if (opname[-1] != ' ' || opname[-2] == ' ') |
| 3578 | fix = 1; |
| 3579 | } |
| 3580 | else |
| 3581 | { |
| 3582 | /* There should 0 spaces between 'operator' and 'OPERATOR'. */ |
| 3583 | if (opname[-1] == ' ') |
| 3584 | fix = 0; |
| 3585 | } |
| 3586 | /* If wrong number of spaces, fix it. */ |
| 3587 | if (fix >= 0) |
| 3588 | { |
| 3589 | char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1); |
| 3590 | |
| 3591 | sprintf (tmp, "operator%.*s%s", fix, " ", opname); |
| 3592 | regexp = tmp; |
| 3593 | } |
| 3594 | } |
| 3595 | |
| 3596 | errcode = regcomp (&datum.preg, regexp, |
| 3597 | REG_NOSUB | (case_sensitivity == case_sensitive_off |
| 3598 | ? REG_ICASE : 0)); |
| 3599 | if (errcode != 0) |
| 3600 | { |
| 3601 | char *err = get_regcomp_error (errcode, &datum.preg); |
| 3602 | |
| 3603 | make_cleanup (xfree, err); |
| 3604 | error (_("Invalid regexp (%s): %s"), err, regexp); |
| 3605 | } |
| 3606 | datum.preg_p = 1; |
| 3607 | make_regfree_cleanup (&datum.preg); |
| 3608 | } |
| 3609 | |
| 3610 | /* Search through the partial symtabs *first* for all symbols |
| 3611 | matching the regexp. That way we don't have to reproduce all of |
| 3612 | the machinery below. */ |
| 3613 | |
| 3614 | datum.nfiles = nfiles; |
| 3615 | datum.files = files; |
| 3616 | expand_symtabs_matching ((nfiles == 0 |
| 3617 | ? NULL |
| 3618 | : search_symbols_file_matches), |
| 3619 | search_symbols_name_matches, |
| 3620 | kind, &datum); |
| 3621 | |
| 3622 | /* Here, we search through the minimal symbol tables for functions |
| 3623 | and variables that match, and force their symbols to be read. |
| 3624 | This is in particular necessary for demangled variable names, |
| 3625 | which are no longer put into the partial symbol tables. |
| 3626 | The symbol will then be found during the scan of symtabs below. |
| 3627 | |
| 3628 | For functions, find_pc_symtab should succeed if we have debug info |
| 3629 | for the function, for variables we have to call |
| 3630 | lookup_symbol_in_objfile_from_linkage_name to determine if the variable |
| 3631 | has debug info. |
| 3632 | If the lookup fails, set found_misc so that we will rescan to print |
| 3633 | any matching symbols without debug info. |
| 3634 | We only search the objfile the msymbol came from, we no longer search |
| 3635 | all objfiles. In large programs (1000s of shared libs) searching all |
| 3636 | objfiles is not worth the pain. */ |
| 3637 | |
| 3638 | if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN)) |
| 3639 | { |
| 3640 | ALL_MSYMBOLS (objfile, msymbol) |
| 3641 | { |
| 3642 | QUIT; |
| 3643 | |
| 3644 | if (msymbol->created_by_gdb) |
| 3645 | continue; |
| 3646 | |
| 3647 | if (MSYMBOL_TYPE (msymbol) == ourtype |
| 3648 | || MSYMBOL_TYPE (msymbol) == ourtype2 |
| 3649 | || MSYMBOL_TYPE (msymbol) == ourtype3 |
| 3650 | || MSYMBOL_TYPE (msymbol) == ourtype4) |
| 3651 | { |
| 3652 | if (!datum.preg_p |
| 3653 | || regexec (&datum.preg, MSYMBOL_NATURAL_NAME (msymbol), 0, |
| 3654 | NULL, 0) == 0) |
| 3655 | { |
| 3656 | /* Note: An important side-effect of these lookup functions |
| 3657 | is to expand the symbol table if msymbol is found, for the |
| 3658 | benefit of the next loop on ALL_PRIMARY_SYMTABS. */ |
| 3659 | if (kind == FUNCTIONS_DOMAIN |
| 3660 | ? find_pc_symtab (MSYMBOL_VALUE_ADDRESS (objfile, |
| 3661 | msymbol)) == NULL |
| 3662 | : (lookup_symbol_in_objfile_from_linkage_name |
| 3663 | (objfile, MSYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN) |
| 3664 | == NULL)) |
| 3665 | found_misc = 1; |
| 3666 | } |
| 3667 | } |
| 3668 | } |
| 3669 | } |
| 3670 | |
| 3671 | found = NULL; |
| 3672 | tail = NULL; |
| 3673 | nfound = 0; |
| 3674 | retval_chain = make_cleanup_free_search_symbols (&found); |
| 3675 | |
| 3676 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 3677 | { |
| 3678 | bv = BLOCKVECTOR (s); |
| 3679 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
| 3680 | { |
| 3681 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 3682 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3683 | { |
| 3684 | struct symtab *real_symtab = SYMBOL_SYMTAB (sym); |
| 3685 | |
| 3686 | QUIT; |
| 3687 | |
| 3688 | /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be |
| 3689 | a substring of symtab_to_fullname as it may contain "./" etc. */ |
| 3690 | if ((file_matches (real_symtab->filename, files, nfiles, 0) |
| 3691 | || ((basenames_may_differ |
| 3692 | || file_matches (lbasename (real_symtab->filename), |
| 3693 | files, nfiles, 1)) |
| 3694 | && file_matches (symtab_to_fullname (real_symtab), |
| 3695 | files, nfiles, 0))) |
| 3696 | && ((!datum.preg_p |
| 3697 | || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0, |
| 3698 | NULL, 0) == 0) |
| 3699 | && ((kind == VARIABLES_DOMAIN |
| 3700 | && SYMBOL_CLASS (sym) != LOC_TYPEDEF |
| 3701 | && SYMBOL_CLASS (sym) != LOC_UNRESOLVED |
| 3702 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
| 3703 | /* LOC_CONST can be used for more than just enums, |
| 3704 | e.g., c++ static const members. |
| 3705 | We only want to skip enums here. */ |
| 3706 | && !(SYMBOL_CLASS (sym) == LOC_CONST |
| 3707 | && TYPE_CODE (SYMBOL_TYPE (sym)) |
| 3708 | == TYPE_CODE_ENUM)) |
| 3709 | || (kind == FUNCTIONS_DOMAIN |
| 3710 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 3711 | || (kind == TYPES_DOMAIN |
| 3712 | && SYMBOL_CLASS (sym) == LOC_TYPEDEF)))) |
| 3713 | { |
| 3714 | /* match */ |
| 3715 | struct symbol_search *psr = (struct symbol_search *) |
| 3716 | xmalloc (sizeof (struct symbol_search)); |
| 3717 | psr->block = i; |
| 3718 | psr->symtab = real_symtab; |
| 3719 | psr->symbol = sym; |
| 3720 | memset (&psr->msymbol, 0, sizeof (psr->msymbol)); |
| 3721 | psr->next = NULL; |
| 3722 | if (tail == NULL) |
| 3723 | found = psr; |
| 3724 | else |
| 3725 | tail->next = psr; |
| 3726 | tail = psr; |
| 3727 | nfound ++; |
| 3728 | } |
| 3729 | } |
| 3730 | } |
| 3731 | } |
| 3732 | |
| 3733 | if (found != NULL) |
| 3734 | { |
| 3735 | sort_search_symbols_remove_dups (found, nfound, &found, &tail); |
| 3736 | /* Note: nfound is no longer useful beyond this point. */ |
| 3737 | } |
| 3738 | |
| 3739 | /* If there are no eyes, avoid all contact. I mean, if there are |
| 3740 | no debug symbols, then print directly from the msymbol_vector. */ |
| 3741 | |
| 3742 | if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN)) |
| 3743 | { |
| 3744 | ALL_MSYMBOLS (objfile, msymbol) |
| 3745 | { |
| 3746 | QUIT; |
| 3747 | |
| 3748 | if (msymbol->created_by_gdb) |
| 3749 | continue; |
| 3750 | |
| 3751 | if (MSYMBOL_TYPE (msymbol) == ourtype |
| 3752 | || MSYMBOL_TYPE (msymbol) == ourtype2 |
| 3753 | || MSYMBOL_TYPE (msymbol) == ourtype3 |
| 3754 | || MSYMBOL_TYPE (msymbol) == ourtype4) |
| 3755 | { |
| 3756 | if (!datum.preg_p |
| 3757 | || regexec (&datum.preg, MSYMBOL_NATURAL_NAME (msymbol), 0, |
| 3758 | NULL, 0) == 0) |
| 3759 | { |
| 3760 | /* For functions we can do a quick check of whether the |
| 3761 | symbol might be found via find_pc_symtab. */ |
| 3762 | if (kind != FUNCTIONS_DOMAIN |
| 3763 | || find_pc_symtab (MSYMBOL_VALUE_ADDRESS (objfile, |
| 3764 | msymbol)) == NULL) |
| 3765 | { |
| 3766 | if (lookup_symbol_in_objfile_from_linkage_name |
| 3767 | (objfile, MSYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN) |
| 3768 | == NULL) |
| 3769 | { |
| 3770 | /* match */ |
| 3771 | struct symbol_search *psr = (struct symbol_search *) |
| 3772 | xmalloc (sizeof (struct symbol_search)); |
| 3773 | psr->block = i; |
| 3774 | psr->msymbol.minsym = msymbol; |
| 3775 | psr->msymbol.objfile = objfile; |
| 3776 | psr->symtab = NULL; |
| 3777 | psr->symbol = NULL; |
| 3778 | psr->next = NULL; |
| 3779 | if (tail == NULL) |
| 3780 | found = psr; |
| 3781 | else |
| 3782 | tail->next = psr; |
| 3783 | tail = psr; |
| 3784 | } |
| 3785 | } |
| 3786 | } |
| 3787 | } |
| 3788 | } |
| 3789 | } |
| 3790 | |
| 3791 | discard_cleanups (retval_chain); |
| 3792 | do_cleanups (old_chain); |
| 3793 | *matches = found; |
| 3794 | } |
| 3795 | |
| 3796 | /* Helper function for symtab_symbol_info, this function uses |
| 3797 | the data returned from search_symbols() to print information |
| 3798 | regarding the match to gdb_stdout. */ |
| 3799 | |
| 3800 | static void |
| 3801 | print_symbol_info (enum search_domain kind, |
| 3802 | struct symtab *s, struct symbol *sym, |
| 3803 | int block, const char *last) |
| 3804 | { |
| 3805 | const char *s_filename = symtab_to_filename_for_display (s); |
| 3806 | |
| 3807 | if (last == NULL || filename_cmp (last, s_filename) != 0) |
| 3808 | { |
| 3809 | fputs_filtered ("\nFile ", gdb_stdout); |
| 3810 | fputs_filtered (s_filename, gdb_stdout); |
| 3811 | fputs_filtered (":\n", gdb_stdout); |
| 3812 | } |
| 3813 | |
| 3814 | if (kind != TYPES_DOMAIN && block == STATIC_BLOCK) |
| 3815 | printf_filtered ("static "); |
| 3816 | |
| 3817 | /* Typedef that is not a C++ class. */ |
| 3818 | if (kind == TYPES_DOMAIN |
| 3819 | && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN) |
| 3820 | typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout); |
| 3821 | /* variable, func, or typedef-that-is-c++-class. */ |
| 3822 | else if (kind < TYPES_DOMAIN |
| 3823 | || (kind == TYPES_DOMAIN |
| 3824 | && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN)) |
| 3825 | { |
| 3826 | type_print (SYMBOL_TYPE (sym), |
| 3827 | (SYMBOL_CLASS (sym) == LOC_TYPEDEF |
| 3828 | ? "" : SYMBOL_PRINT_NAME (sym)), |
| 3829 | gdb_stdout, 0); |
| 3830 | |
| 3831 | printf_filtered (";\n"); |
| 3832 | } |
| 3833 | } |
| 3834 | |
| 3835 | /* This help function for symtab_symbol_info() prints information |
| 3836 | for non-debugging symbols to gdb_stdout. */ |
| 3837 | |
| 3838 | static void |
| 3839 | print_msymbol_info (struct bound_minimal_symbol msymbol) |
| 3840 | { |
| 3841 | struct gdbarch *gdbarch = get_objfile_arch (msymbol.objfile); |
| 3842 | char *tmp; |
| 3843 | |
| 3844 | if (gdbarch_addr_bit (gdbarch) <= 32) |
| 3845 | tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol) |
| 3846 | & (CORE_ADDR) 0xffffffff, |
| 3847 | 8); |
| 3848 | else |
| 3849 | tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol), |
| 3850 | 16); |
| 3851 | printf_filtered ("%s %s\n", |
| 3852 | tmp, MSYMBOL_PRINT_NAME (msymbol.minsym)); |
| 3853 | } |
| 3854 | |
| 3855 | /* This is the guts of the commands "info functions", "info types", and |
| 3856 | "info variables". It calls search_symbols to find all matches and then |
| 3857 | print_[m]symbol_info to print out some useful information about the |
| 3858 | matches. */ |
| 3859 | |
| 3860 | static void |
| 3861 | symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty) |
| 3862 | { |
| 3863 | static const char * const classnames[] = |
| 3864 | {"variable", "function", "type"}; |
| 3865 | struct symbol_search *symbols; |
| 3866 | struct symbol_search *p; |
| 3867 | struct cleanup *old_chain; |
| 3868 | const char *last_filename = NULL; |
| 3869 | int first = 1; |
| 3870 | |
| 3871 | gdb_assert (kind <= TYPES_DOMAIN); |
| 3872 | |
| 3873 | /* Must make sure that if we're interrupted, symbols gets freed. */ |
| 3874 | search_symbols (regexp, kind, 0, (char **) NULL, &symbols); |
| 3875 | old_chain = make_cleanup_free_search_symbols (&symbols); |
| 3876 | |
| 3877 | if (regexp != NULL) |
| 3878 | printf_filtered (_("All %ss matching regular expression \"%s\":\n"), |
| 3879 | classnames[kind], regexp); |
| 3880 | else |
| 3881 | printf_filtered (_("All defined %ss:\n"), classnames[kind]); |
| 3882 | |
| 3883 | for (p = symbols; p != NULL; p = p->next) |
| 3884 | { |
| 3885 | QUIT; |
| 3886 | |
| 3887 | if (p->msymbol.minsym != NULL) |
| 3888 | { |
| 3889 | if (first) |
| 3890 | { |
| 3891 | printf_filtered (_("\nNon-debugging symbols:\n")); |
| 3892 | first = 0; |
| 3893 | } |
| 3894 | print_msymbol_info (p->msymbol); |
| 3895 | } |
| 3896 | else |
| 3897 | { |
| 3898 | print_symbol_info (kind, |
| 3899 | p->symtab, |
| 3900 | p->symbol, |
| 3901 | p->block, |
| 3902 | last_filename); |
| 3903 | last_filename = symtab_to_filename_for_display (p->symtab); |
| 3904 | } |
| 3905 | } |
| 3906 | |
| 3907 | do_cleanups (old_chain); |
| 3908 | } |
| 3909 | |
| 3910 | static void |
| 3911 | variables_info (char *regexp, int from_tty) |
| 3912 | { |
| 3913 | symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty); |
| 3914 | } |
| 3915 | |
| 3916 | static void |
| 3917 | functions_info (char *regexp, int from_tty) |
| 3918 | { |
| 3919 | symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty); |
| 3920 | } |
| 3921 | |
| 3922 | |
| 3923 | static void |
| 3924 | types_info (char *regexp, int from_tty) |
| 3925 | { |
| 3926 | symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty); |
| 3927 | } |
| 3928 | |
| 3929 | /* Breakpoint all functions matching regular expression. */ |
| 3930 | |
| 3931 | void |
| 3932 | rbreak_command_wrapper (char *regexp, int from_tty) |
| 3933 | { |
| 3934 | rbreak_command (regexp, from_tty); |
| 3935 | } |
| 3936 | |
| 3937 | /* A cleanup function that calls end_rbreak_breakpoints. */ |
| 3938 | |
| 3939 | static void |
| 3940 | do_end_rbreak_breakpoints (void *ignore) |
| 3941 | { |
| 3942 | end_rbreak_breakpoints (); |
| 3943 | } |
| 3944 | |
| 3945 | static void |
| 3946 | rbreak_command (char *regexp, int from_tty) |
| 3947 | { |
| 3948 | struct symbol_search *ss; |
| 3949 | struct symbol_search *p; |
| 3950 | struct cleanup *old_chain; |
| 3951 | char *string = NULL; |
| 3952 | int len = 0; |
| 3953 | char **files = NULL, *file_name; |
| 3954 | int nfiles = 0; |
| 3955 | |
| 3956 | if (regexp) |
| 3957 | { |
| 3958 | char *colon = strchr (regexp, ':'); |
| 3959 | |
| 3960 | if (colon && *(colon + 1) != ':') |
| 3961 | { |
| 3962 | int colon_index; |
| 3963 | |
| 3964 | colon_index = colon - regexp; |
| 3965 | file_name = alloca (colon_index + 1); |
| 3966 | memcpy (file_name, regexp, colon_index); |
| 3967 | file_name[colon_index--] = 0; |
| 3968 | while (isspace (file_name[colon_index])) |
| 3969 | file_name[colon_index--] = 0; |
| 3970 | files = &file_name; |
| 3971 | nfiles = 1; |
| 3972 | regexp = skip_spaces (colon + 1); |
| 3973 | } |
| 3974 | } |
| 3975 | |
| 3976 | search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss); |
| 3977 | old_chain = make_cleanup_free_search_symbols (&ss); |
| 3978 | make_cleanup (free_current_contents, &string); |
| 3979 | |
| 3980 | start_rbreak_breakpoints (); |
| 3981 | make_cleanup (do_end_rbreak_breakpoints, NULL); |
| 3982 | for (p = ss; p != NULL; p = p->next) |
| 3983 | { |
| 3984 | if (p->msymbol.minsym == NULL) |
| 3985 | { |
| 3986 | const char *fullname = symtab_to_fullname (p->symtab); |
| 3987 | |
| 3988 | int newlen = (strlen (fullname) |
| 3989 | + strlen (SYMBOL_LINKAGE_NAME (p->symbol)) |
| 3990 | + 4); |
| 3991 | |
| 3992 | if (newlen > len) |
| 3993 | { |
| 3994 | string = xrealloc (string, newlen); |
| 3995 | len = newlen; |
| 3996 | } |
| 3997 | strcpy (string, fullname); |
| 3998 | strcat (string, ":'"); |
| 3999 | strcat (string, SYMBOL_LINKAGE_NAME (p->symbol)); |
| 4000 | strcat (string, "'"); |
| 4001 | break_command (string, from_tty); |
| 4002 | print_symbol_info (FUNCTIONS_DOMAIN, |
| 4003 | p->symtab, |
| 4004 | p->symbol, |
| 4005 | p->block, |
| 4006 | symtab_to_filename_for_display (p->symtab)); |
| 4007 | } |
| 4008 | else |
| 4009 | { |
| 4010 | int newlen = (strlen (MSYMBOL_LINKAGE_NAME (p->msymbol.minsym)) + 3); |
| 4011 | |
| 4012 | if (newlen > len) |
| 4013 | { |
| 4014 | string = xrealloc (string, newlen); |
| 4015 | len = newlen; |
| 4016 | } |
| 4017 | strcpy (string, "'"); |
| 4018 | strcat (string, MSYMBOL_LINKAGE_NAME (p->msymbol.minsym)); |
| 4019 | strcat (string, "'"); |
| 4020 | |
| 4021 | break_command (string, from_tty); |
| 4022 | printf_filtered ("<function, no debug info> %s;\n", |
| 4023 | MSYMBOL_PRINT_NAME (p->msymbol.minsym)); |
| 4024 | } |
| 4025 | } |
| 4026 | |
| 4027 | do_cleanups (old_chain); |
| 4028 | } |
| 4029 | \f |
| 4030 | |
| 4031 | /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN. |
| 4032 | |
| 4033 | Either sym_text[sym_text_len] != '(' and then we search for any |
| 4034 | symbol starting with SYM_TEXT text. |
| 4035 | |
| 4036 | Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to |
| 4037 | be terminated at that point. Partial symbol tables do not have parameters |
| 4038 | information. */ |
| 4039 | |
| 4040 | static int |
| 4041 | compare_symbol_name (const char *name, const char *sym_text, int sym_text_len) |
| 4042 | { |
| 4043 | int (*ncmp) (const char *, const char *, size_t); |
| 4044 | |
| 4045 | ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp); |
| 4046 | |
| 4047 | if (ncmp (name, sym_text, sym_text_len) != 0) |
| 4048 | return 0; |
| 4049 | |
| 4050 | if (sym_text[sym_text_len] == '(') |
| 4051 | { |
| 4052 | /* User searches for `name(someth...'. Require NAME to be terminated. |
| 4053 | Normally psymtabs and gdbindex have no parameter types so '\0' will be |
| 4054 | present but accept even parameters presence. In this case this |
| 4055 | function is in fact strcmp_iw but whitespace skipping is not supported |
| 4056 | for tab completion. */ |
| 4057 | |
| 4058 | if (name[sym_text_len] != '\0' && name[sym_text_len] != '(') |
| 4059 | return 0; |
| 4060 | } |
| 4061 | |
| 4062 | return 1; |
| 4063 | } |
| 4064 | |
| 4065 | /* Free any memory associated with a completion list. */ |
| 4066 | |
| 4067 | static void |
| 4068 | free_completion_list (VEC (char_ptr) **list_ptr) |
| 4069 | { |
| 4070 | int i; |
| 4071 | char *p; |
| 4072 | |
| 4073 | for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i) |
| 4074 | xfree (p); |
| 4075 | VEC_free (char_ptr, *list_ptr); |
| 4076 | } |
| 4077 | |
| 4078 | /* Callback for make_cleanup. */ |
| 4079 | |
| 4080 | static void |
| 4081 | do_free_completion_list (void *list) |
| 4082 | { |
| 4083 | free_completion_list (list); |
| 4084 | } |
| 4085 | |
| 4086 | /* Helper routine for make_symbol_completion_list. */ |
| 4087 | |
| 4088 | static VEC (char_ptr) *return_val; |
| 4089 | |
| 4090 | #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \ |
| 4091 | completion_list_add_name \ |
| 4092 | (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word)) |
| 4093 | |
| 4094 | #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \ |
| 4095 | completion_list_add_name \ |
| 4096 | (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word)) |
| 4097 | |
| 4098 | /* Test to see if the symbol specified by SYMNAME (which is already |
| 4099 | demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN |
| 4100 | characters. If so, add it to the current completion list. */ |
| 4101 | |
| 4102 | static void |
| 4103 | completion_list_add_name (const char *symname, |
| 4104 | const char *sym_text, int sym_text_len, |
| 4105 | const char *text, const char *word) |
| 4106 | { |
| 4107 | /* Clip symbols that cannot match. */ |
| 4108 | if (!compare_symbol_name (symname, sym_text, sym_text_len)) |
| 4109 | return; |
| 4110 | |
| 4111 | /* We have a match for a completion, so add SYMNAME to the current list |
| 4112 | of matches. Note that the name is moved to freshly malloc'd space. */ |
| 4113 | |
| 4114 | { |
| 4115 | char *new; |
| 4116 | |
| 4117 | if (word == sym_text) |
| 4118 | { |
| 4119 | new = xmalloc (strlen (symname) + 5); |
| 4120 | strcpy (new, symname); |
| 4121 | } |
| 4122 | else if (word > sym_text) |
| 4123 | { |
| 4124 | /* Return some portion of symname. */ |
| 4125 | new = xmalloc (strlen (symname) + 5); |
| 4126 | strcpy (new, symname + (word - sym_text)); |
| 4127 | } |
| 4128 | else |
| 4129 | { |
| 4130 | /* Return some of SYM_TEXT plus symname. */ |
| 4131 | new = xmalloc (strlen (symname) + (sym_text - word) + 5); |
| 4132 | strncpy (new, word, sym_text - word); |
| 4133 | new[sym_text - word] = '\0'; |
| 4134 | strcat (new, symname); |
| 4135 | } |
| 4136 | |
| 4137 | VEC_safe_push (char_ptr, return_val, new); |
| 4138 | } |
| 4139 | } |
| 4140 | |
| 4141 | /* ObjC: In case we are completing on a selector, look as the msymbol |
| 4142 | again and feed all the selectors into the mill. */ |
| 4143 | |
| 4144 | static void |
| 4145 | completion_list_objc_symbol (struct minimal_symbol *msymbol, |
| 4146 | const char *sym_text, int sym_text_len, |
| 4147 | const char *text, const char *word) |
| 4148 | { |
| 4149 | static char *tmp = NULL; |
| 4150 | static unsigned int tmplen = 0; |
| 4151 | |
| 4152 | const char *method, *category, *selector; |
| 4153 | char *tmp2 = NULL; |
| 4154 | |
| 4155 | method = MSYMBOL_NATURAL_NAME (msymbol); |
| 4156 | |
| 4157 | /* Is it a method? */ |
| 4158 | if ((method[0] != '-') && (method[0] != '+')) |
| 4159 | return; |
| 4160 | |
| 4161 | if (sym_text[0] == '[') |
| 4162 | /* Complete on shortened method method. */ |
| 4163 | completion_list_add_name (method + 1, sym_text, sym_text_len, text, word); |
| 4164 | |
| 4165 | while ((strlen (method) + 1) >= tmplen) |
| 4166 | { |
| 4167 | if (tmplen == 0) |
| 4168 | tmplen = 1024; |
| 4169 | else |
| 4170 | tmplen *= 2; |
| 4171 | tmp = xrealloc (tmp, tmplen); |
| 4172 | } |
| 4173 | selector = strchr (method, ' '); |
| 4174 | if (selector != NULL) |
| 4175 | selector++; |
| 4176 | |
| 4177 | category = strchr (method, '('); |
| 4178 | |
| 4179 | if ((category != NULL) && (selector != NULL)) |
| 4180 | { |
| 4181 | memcpy (tmp, method, (category - method)); |
| 4182 | tmp[category - method] = ' '; |
| 4183 | memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1); |
| 4184 | completion_list_add_name (tmp, sym_text, sym_text_len, text, word); |
| 4185 | if (sym_text[0] == '[') |
| 4186 | completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word); |
| 4187 | } |
| 4188 | |
| 4189 | if (selector != NULL) |
| 4190 | { |
| 4191 | /* Complete on selector only. */ |
| 4192 | strcpy (tmp, selector); |
| 4193 | tmp2 = strchr (tmp, ']'); |
| 4194 | if (tmp2 != NULL) |
| 4195 | *tmp2 = '\0'; |
| 4196 | |
| 4197 | completion_list_add_name (tmp, sym_text, sym_text_len, text, word); |
| 4198 | } |
| 4199 | } |
| 4200 | |
| 4201 | /* Break the non-quoted text based on the characters which are in |
| 4202 | symbols. FIXME: This should probably be language-specific. */ |
| 4203 | |
| 4204 | static const char * |
| 4205 | language_search_unquoted_string (const char *text, const char *p) |
| 4206 | { |
| 4207 | for (; p > text; --p) |
| 4208 | { |
| 4209 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0') |
| 4210 | continue; |
| 4211 | else |
| 4212 | { |
| 4213 | if ((current_language->la_language == language_objc)) |
| 4214 | { |
| 4215 | if (p[-1] == ':') /* Might be part of a method name. */ |
| 4216 | continue; |
| 4217 | else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+')) |
| 4218 | p -= 2; /* Beginning of a method name. */ |
| 4219 | else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')') |
| 4220 | { /* Might be part of a method name. */ |
| 4221 | const char *t = p; |
| 4222 | |
| 4223 | /* Seeing a ' ' or a '(' is not conclusive evidence |
| 4224 | that we are in the middle of a method name. However, |
| 4225 | finding "-[" or "+[" should be pretty un-ambiguous. |
| 4226 | Unfortunately we have to find it now to decide. */ |
| 4227 | |
| 4228 | while (t > text) |
| 4229 | if (isalnum (t[-1]) || t[-1] == '_' || |
| 4230 | t[-1] == ' ' || t[-1] == ':' || |
| 4231 | t[-1] == '(' || t[-1] == ')') |
| 4232 | --t; |
| 4233 | else |
| 4234 | break; |
| 4235 | |
| 4236 | if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+')) |
| 4237 | p = t - 2; /* Method name detected. */ |
| 4238 | /* Else we leave with p unchanged. */ |
| 4239 | } |
| 4240 | } |
| 4241 | break; |
| 4242 | } |
| 4243 | } |
| 4244 | return p; |
| 4245 | } |
| 4246 | |
| 4247 | static void |
| 4248 | completion_list_add_fields (struct symbol *sym, const char *sym_text, |
| 4249 | int sym_text_len, const char *text, |
| 4250 | const char *word) |
| 4251 | { |
| 4252 | if (SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 4253 | { |
| 4254 | struct type *t = SYMBOL_TYPE (sym); |
| 4255 | enum type_code c = TYPE_CODE (t); |
| 4256 | int j; |
| 4257 | |
| 4258 | if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT) |
| 4259 | for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++) |
| 4260 | if (TYPE_FIELD_NAME (t, j)) |
| 4261 | completion_list_add_name (TYPE_FIELD_NAME (t, j), |
| 4262 | sym_text, sym_text_len, text, word); |
| 4263 | } |
| 4264 | } |
| 4265 | |
| 4266 | /* Type of the user_data argument passed to add_macro_name or |
| 4267 | symbol_completion_matcher. The contents are simply whatever is |
| 4268 | needed by completion_list_add_name. */ |
| 4269 | struct add_name_data |
| 4270 | { |
| 4271 | const char *sym_text; |
| 4272 | int sym_text_len; |
| 4273 | const char *text; |
| 4274 | const char *word; |
| 4275 | }; |
| 4276 | |
| 4277 | /* A callback used with macro_for_each and macro_for_each_in_scope. |
| 4278 | This adds a macro's name to the current completion list. */ |
| 4279 | |
| 4280 | static void |
| 4281 | add_macro_name (const char *name, const struct macro_definition *ignore, |
| 4282 | struct macro_source_file *ignore2, int ignore3, |
| 4283 | void *user_data) |
| 4284 | { |
| 4285 | struct add_name_data *datum = (struct add_name_data *) user_data; |
| 4286 | |
| 4287 | completion_list_add_name (name, |
| 4288 | datum->sym_text, datum->sym_text_len, |
| 4289 | datum->text, datum->word); |
| 4290 | } |
| 4291 | |
| 4292 | /* A callback for expand_symtabs_matching. */ |
| 4293 | |
| 4294 | static int |
| 4295 | symbol_completion_matcher (const char *name, void *user_data) |
| 4296 | { |
| 4297 | struct add_name_data *datum = (struct add_name_data *) user_data; |
| 4298 | |
| 4299 | return compare_symbol_name (name, datum->sym_text, datum->sym_text_len); |
| 4300 | } |
| 4301 | |
| 4302 | VEC (char_ptr) * |
| 4303 | default_make_symbol_completion_list_break_on (const char *text, |
| 4304 | const char *word, |
| 4305 | const char *break_on, |
| 4306 | enum type_code code) |
| 4307 | { |
| 4308 | /* Problem: All of the symbols have to be copied because readline |
| 4309 | frees them. I'm not going to worry about this; hopefully there |
| 4310 | won't be that many. */ |
| 4311 | |
| 4312 | struct symbol *sym; |
| 4313 | struct symtab *s; |
| 4314 | struct minimal_symbol *msymbol; |
| 4315 | struct objfile *objfile; |
| 4316 | const struct block *b; |
| 4317 | const struct block *surrounding_static_block, *surrounding_global_block; |
| 4318 | struct block_iterator iter; |
| 4319 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 4320 | const char *sym_text; |
| 4321 | /* Length of sym_text. */ |
| 4322 | int sym_text_len; |
| 4323 | struct add_name_data datum; |
| 4324 | struct cleanup *back_to; |
| 4325 | |
| 4326 | /* Now look for the symbol we are supposed to complete on. */ |
| 4327 | { |
| 4328 | const char *p; |
| 4329 | char quote_found; |
| 4330 | const char *quote_pos = NULL; |
| 4331 | |
| 4332 | /* First see if this is a quoted string. */ |
| 4333 | quote_found = '\0'; |
| 4334 | for (p = text; *p != '\0'; ++p) |
| 4335 | { |
| 4336 | if (quote_found != '\0') |
| 4337 | { |
| 4338 | if (*p == quote_found) |
| 4339 | /* Found close quote. */ |
| 4340 | quote_found = '\0'; |
| 4341 | else if (*p == '\\' && p[1] == quote_found) |
| 4342 | /* A backslash followed by the quote character |
| 4343 | doesn't end the string. */ |
| 4344 | ++p; |
| 4345 | } |
| 4346 | else if (*p == '\'' || *p == '"') |
| 4347 | { |
| 4348 | quote_found = *p; |
| 4349 | quote_pos = p; |
| 4350 | } |
| 4351 | } |
| 4352 | if (quote_found == '\'') |
| 4353 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 4354 | sym_text = quote_pos + 1; |
| 4355 | else if (quote_found == '"') |
| 4356 | /* A double-quoted string is never a symbol, nor does it make sense |
| 4357 | to complete it any other way. */ |
| 4358 | { |
| 4359 | return NULL; |
| 4360 | } |
| 4361 | else |
| 4362 | { |
| 4363 | /* It is not a quoted string. Break it based on the characters |
| 4364 | which are in symbols. */ |
| 4365 | while (p > text) |
| 4366 | { |
| 4367 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0' |
| 4368 | || p[-1] == ':' || strchr (break_on, p[-1]) != NULL) |
| 4369 | --p; |
| 4370 | else |
| 4371 | break; |
| 4372 | } |
| 4373 | sym_text = p; |
| 4374 | } |
| 4375 | } |
| 4376 | |
| 4377 | sym_text_len = strlen (sym_text); |
| 4378 | |
| 4379 | /* Prepare SYM_TEXT_LEN for compare_symbol_name. */ |
| 4380 | |
| 4381 | if (current_language->la_language == language_cplus |
| 4382 | || current_language->la_language == language_java |
| 4383 | || current_language->la_language == language_fortran) |
| 4384 | { |
| 4385 | /* These languages may have parameters entered by user but they are never |
| 4386 | present in the partial symbol tables. */ |
| 4387 | |
| 4388 | const char *cs = memchr (sym_text, '(', sym_text_len); |
| 4389 | |
| 4390 | if (cs) |
| 4391 | sym_text_len = cs - sym_text; |
| 4392 | } |
| 4393 | gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '('); |
| 4394 | |
| 4395 | return_val = NULL; |
| 4396 | back_to = make_cleanup (do_free_completion_list, &return_val); |
| 4397 | |
| 4398 | datum.sym_text = sym_text; |
| 4399 | datum.sym_text_len = sym_text_len; |
| 4400 | datum.text = text; |
| 4401 | datum.word = word; |
| 4402 | |
| 4403 | /* Look through the partial symtabs for all symbols which begin |
| 4404 | by matching SYM_TEXT. Expand all CUs that you find to the list. |
| 4405 | The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */ |
| 4406 | expand_symtabs_matching (NULL, symbol_completion_matcher, ALL_DOMAIN, |
| 4407 | &datum); |
| 4408 | |
| 4409 | /* At this point scan through the misc symbol vectors and add each |
| 4410 | symbol you find to the list. Eventually we want to ignore |
| 4411 | anything that isn't a text symbol (everything else will be |
| 4412 | handled by the psymtab code above). */ |
| 4413 | |
| 4414 | if (code == TYPE_CODE_UNDEF) |
| 4415 | { |
| 4416 | ALL_MSYMBOLS (objfile, msymbol) |
| 4417 | { |
| 4418 | QUIT; |
| 4419 | MCOMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, |
| 4420 | word); |
| 4421 | |
| 4422 | completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, |
| 4423 | word); |
| 4424 | } |
| 4425 | } |
| 4426 | |
| 4427 | /* Search upwards from currently selected frame (so that we can |
| 4428 | complete on local vars). Also catch fields of types defined in |
| 4429 | this places which match our text string. Only complete on types |
| 4430 | visible from current context. */ |
| 4431 | |
| 4432 | b = get_selected_block (0); |
| 4433 | surrounding_static_block = block_static_block (b); |
| 4434 | surrounding_global_block = block_global_block (b); |
| 4435 | if (surrounding_static_block != NULL) |
| 4436 | while (b != surrounding_static_block) |
| 4437 | { |
| 4438 | QUIT; |
| 4439 | |
| 4440 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4441 | { |
| 4442 | if (code == TYPE_CODE_UNDEF) |
| 4443 | { |
| 4444 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, |
| 4445 | word); |
| 4446 | completion_list_add_fields (sym, sym_text, sym_text_len, text, |
| 4447 | word); |
| 4448 | } |
| 4449 | else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN |
| 4450 | && TYPE_CODE (SYMBOL_TYPE (sym)) == code) |
| 4451 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, |
| 4452 | word); |
| 4453 | } |
| 4454 | |
| 4455 | /* Stop when we encounter an enclosing function. Do not stop for |
| 4456 | non-inlined functions - the locals of the enclosing function |
| 4457 | are in scope for a nested function. */ |
| 4458 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 4459 | break; |
| 4460 | b = BLOCK_SUPERBLOCK (b); |
| 4461 | } |
| 4462 | |
| 4463 | /* Add fields from the file's types; symbols will be added below. */ |
| 4464 | |
| 4465 | if (code == TYPE_CODE_UNDEF) |
| 4466 | { |
| 4467 | if (surrounding_static_block != NULL) |
| 4468 | ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym) |
| 4469 | completion_list_add_fields (sym, sym_text, sym_text_len, text, word); |
| 4470 | |
| 4471 | if (surrounding_global_block != NULL) |
| 4472 | ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym) |
| 4473 | completion_list_add_fields (sym, sym_text, sym_text_len, text, word); |
| 4474 | } |
| 4475 | |
| 4476 | /* Go through the symtabs and check the externs and statics for |
| 4477 | symbols which match. */ |
| 4478 | |
| 4479 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 4480 | { |
| 4481 | QUIT; |
| 4482 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); |
| 4483 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4484 | { |
| 4485 | if (code == TYPE_CODE_UNDEF |
| 4486 | || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN |
| 4487 | && TYPE_CODE (SYMBOL_TYPE (sym)) == code)) |
| 4488 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4489 | } |
| 4490 | } |
| 4491 | |
| 4492 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 4493 | { |
| 4494 | QUIT; |
| 4495 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 4496 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4497 | { |
| 4498 | if (code == TYPE_CODE_UNDEF |
| 4499 | || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN |
| 4500 | && TYPE_CODE (SYMBOL_TYPE (sym)) == code)) |
| 4501 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4502 | } |
| 4503 | } |
| 4504 | |
| 4505 | /* Skip macros if we are completing a struct tag -- arguable but |
| 4506 | usually what is expected. */ |
| 4507 | if (current_language->la_macro_expansion == macro_expansion_c |
| 4508 | && code == TYPE_CODE_UNDEF) |
| 4509 | { |
| 4510 | struct macro_scope *scope; |
| 4511 | |
| 4512 | /* Add any macros visible in the default scope. Note that this |
| 4513 | may yield the occasional wrong result, because an expression |
| 4514 | might be evaluated in a scope other than the default. For |
| 4515 | example, if the user types "break file:line if <TAB>", the |
| 4516 | resulting expression will be evaluated at "file:line" -- but |
| 4517 | at there does not seem to be a way to detect this at |
| 4518 | completion time. */ |
| 4519 | scope = default_macro_scope (); |
| 4520 | if (scope) |
| 4521 | { |
| 4522 | macro_for_each_in_scope (scope->file, scope->line, |
| 4523 | add_macro_name, &datum); |
| 4524 | xfree (scope); |
| 4525 | } |
| 4526 | |
| 4527 | /* User-defined macros are always visible. */ |
| 4528 | macro_for_each (macro_user_macros, add_macro_name, &datum); |
| 4529 | } |
| 4530 | |
| 4531 | discard_cleanups (back_to); |
| 4532 | return (return_val); |
| 4533 | } |
| 4534 | |
| 4535 | VEC (char_ptr) * |
| 4536 | default_make_symbol_completion_list (const char *text, const char *word, |
| 4537 | enum type_code code) |
| 4538 | { |
| 4539 | return default_make_symbol_completion_list_break_on (text, word, "", code); |
| 4540 | } |
| 4541 | |
| 4542 | /* Return a vector of all symbols (regardless of class) which begin by |
| 4543 | matching TEXT. If the answer is no symbols, then the return value |
| 4544 | is NULL. */ |
| 4545 | |
| 4546 | VEC (char_ptr) * |
| 4547 | make_symbol_completion_list (const char *text, const char *word) |
| 4548 | { |
| 4549 | return current_language->la_make_symbol_completion_list (text, word, |
| 4550 | TYPE_CODE_UNDEF); |
| 4551 | } |
| 4552 | |
| 4553 | /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN |
| 4554 | symbols whose type code is CODE. */ |
| 4555 | |
| 4556 | VEC (char_ptr) * |
| 4557 | make_symbol_completion_type (const char *text, const char *word, |
| 4558 | enum type_code code) |
| 4559 | { |
| 4560 | gdb_assert (code == TYPE_CODE_UNION |
| 4561 | || code == TYPE_CODE_STRUCT |
| 4562 | || code == TYPE_CODE_CLASS |
| 4563 | || code == TYPE_CODE_ENUM); |
| 4564 | return current_language->la_make_symbol_completion_list (text, word, code); |
| 4565 | } |
| 4566 | |
| 4567 | /* Like make_symbol_completion_list, but suitable for use as a |
| 4568 | completion function. */ |
| 4569 | |
| 4570 | VEC (char_ptr) * |
| 4571 | make_symbol_completion_list_fn (struct cmd_list_element *ignore, |
| 4572 | const char *text, const char *word) |
| 4573 | { |
| 4574 | return make_symbol_completion_list (text, word); |
| 4575 | } |
| 4576 | |
| 4577 | /* Like make_symbol_completion_list, but returns a list of symbols |
| 4578 | defined in a source file FILE. */ |
| 4579 | |
| 4580 | VEC (char_ptr) * |
| 4581 | make_file_symbol_completion_list (const char *text, const char *word, |
| 4582 | const char *srcfile) |
| 4583 | { |
| 4584 | struct symbol *sym; |
| 4585 | struct symtab *s; |
| 4586 | struct block *b; |
| 4587 | struct block_iterator iter; |
| 4588 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 4589 | const char *sym_text; |
| 4590 | /* Length of sym_text. */ |
| 4591 | int sym_text_len; |
| 4592 | |
| 4593 | /* Now look for the symbol we are supposed to complete on. |
| 4594 | FIXME: This should be language-specific. */ |
| 4595 | { |
| 4596 | const char *p; |
| 4597 | char quote_found; |
| 4598 | const char *quote_pos = NULL; |
| 4599 | |
| 4600 | /* First see if this is a quoted string. */ |
| 4601 | quote_found = '\0'; |
| 4602 | for (p = text; *p != '\0'; ++p) |
| 4603 | { |
| 4604 | if (quote_found != '\0') |
| 4605 | { |
| 4606 | if (*p == quote_found) |
| 4607 | /* Found close quote. */ |
| 4608 | quote_found = '\0'; |
| 4609 | else if (*p == '\\' && p[1] == quote_found) |
| 4610 | /* A backslash followed by the quote character |
| 4611 | doesn't end the string. */ |
| 4612 | ++p; |
| 4613 | } |
| 4614 | else if (*p == '\'' || *p == '"') |
| 4615 | { |
| 4616 | quote_found = *p; |
| 4617 | quote_pos = p; |
| 4618 | } |
| 4619 | } |
| 4620 | if (quote_found == '\'') |
| 4621 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 4622 | sym_text = quote_pos + 1; |
| 4623 | else if (quote_found == '"') |
| 4624 | /* A double-quoted string is never a symbol, nor does it make sense |
| 4625 | to complete it any other way. */ |
| 4626 | { |
| 4627 | return NULL; |
| 4628 | } |
| 4629 | else |
| 4630 | { |
| 4631 | /* Not a quoted string. */ |
| 4632 | sym_text = language_search_unquoted_string (text, p); |
| 4633 | } |
| 4634 | } |
| 4635 | |
| 4636 | sym_text_len = strlen (sym_text); |
| 4637 | |
| 4638 | return_val = NULL; |
| 4639 | |
| 4640 | /* Find the symtab for SRCFILE (this loads it if it was not yet read |
| 4641 | in). */ |
| 4642 | s = lookup_symtab (srcfile); |
| 4643 | if (s == NULL) |
| 4644 | { |
| 4645 | /* Maybe they typed the file with leading directories, while the |
| 4646 | symbol tables record only its basename. */ |
| 4647 | const char *tail = lbasename (srcfile); |
| 4648 | |
| 4649 | if (tail > srcfile) |
| 4650 | s = lookup_symtab (tail); |
| 4651 | } |
| 4652 | |
| 4653 | /* If we have no symtab for that file, return an empty list. */ |
| 4654 | if (s == NULL) |
| 4655 | return (return_val); |
| 4656 | |
| 4657 | /* Go through this symtab and check the externs and statics for |
| 4658 | symbols which match. */ |
| 4659 | |
| 4660 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); |
| 4661 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4662 | { |
| 4663 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4664 | } |
| 4665 | |
| 4666 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 4667 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4668 | { |
| 4669 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4670 | } |
| 4671 | |
| 4672 | return (return_val); |
| 4673 | } |
| 4674 | |
| 4675 | /* A helper function for make_source_files_completion_list. It adds |
| 4676 | another file name to a list of possible completions, growing the |
| 4677 | list as necessary. */ |
| 4678 | |
| 4679 | static void |
| 4680 | add_filename_to_list (const char *fname, const char *text, const char *word, |
| 4681 | VEC (char_ptr) **list) |
| 4682 | { |
| 4683 | char *new; |
| 4684 | size_t fnlen = strlen (fname); |
| 4685 | |
| 4686 | if (word == text) |
| 4687 | { |
| 4688 | /* Return exactly fname. */ |
| 4689 | new = xmalloc (fnlen + 5); |
| 4690 | strcpy (new, fname); |
| 4691 | } |
| 4692 | else if (word > text) |
| 4693 | { |
| 4694 | /* Return some portion of fname. */ |
| 4695 | new = xmalloc (fnlen + 5); |
| 4696 | strcpy (new, fname + (word - text)); |
| 4697 | } |
| 4698 | else |
| 4699 | { |
| 4700 | /* Return some of TEXT plus fname. */ |
| 4701 | new = xmalloc (fnlen + (text - word) + 5); |
| 4702 | strncpy (new, word, text - word); |
| 4703 | new[text - word] = '\0'; |
| 4704 | strcat (new, fname); |
| 4705 | } |
| 4706 | VEC_safe_push (char_ptr, *list, new); |
| 4707 | } |
| 4708 | |
| 4709 | static int |
| 4710 | not_interesting_fname (const char *fname) |
| 4711 | { |
| 4712 | static const char *illegal_aliens[] = { |
| 4713 | "_globals_", /* inserted by coff_symtab_read */ |
| 4714 | NULL |
| 4715 | }; |
| 4716 | int i; |
| 4717 | |
| 4718 | for (i = 0; illegal_aliens[i]; i++) |
| 4719 | { |
| 4720 | if (filename_cmp (fname, illegal_aliens[i]) == 0) |
| 4721 | return 1; |
| 4722 | } |
| 4723 | return 0; |
| 4724 | } |
| 4725 | |
| 4726 | /* An object of this type is passed as the user_data argument to |
| 4727 | map_partial_symbol_filenames. */ |
| 4728 | struct add_partial_filename_data |
| 4729 | { |
| 4730 | struct filename_seen_cache *filename_seen_cache; |
| 4731 | const char *text; |
| 4732 | const char *word; |
| 4733 | int text_len; |
| 4734 | VEC (char_ptr) **list; |
| 4735 | }; |
| 4736 | |
| 4737 | /* A callback for map_partial_symbol_filenames. */ |
| 4738 | |
| 4739 | static void |
| 4740 | maybe_add_partial_symtab_filename (const char *filename, const char *fullname, |
| 4741 | void *user_data) |
| 4742 | { |
| 4743 | struct add_partial_filename_data *data = user_data; |
| 4744 | |
| 4745 | if (not_interesting_fname (filename)) |
| 4746 | return; |
| 4747 | if (!filename_seen (data->filename_seen_cache, filename, 1) |
| 4748 | && filename_ncmp (filename, data->text, data->text_len) == 0) |
| 4749 | { |
| 4750 | /* This file matches for a completion; add it to the |
| 4751 | current list of matches. */ |
| 4752 | add_filename_to_list (filename, data->text, data->word, data->list); |
| 4753 | } |
| 4754 | else |
| 4755 | { |
| 4756 | const char *base_name = lbasename (filename); |
| 4757 | |
| 4758 | if (base_name != filename |
| 4759 | && !filename_seen (data->filename_seen_cache, base_name, 1) |
| 4760 | && filename_ncmp (base_name, data->text, data->text_len) == 0) |
| 4761 | add_filename_to_list (base_name, data->text, data->word, data->list); |
| 4762 | } |
| 4763 | } |
| 4764 | |
| 4765 | /* Return a vector of all source files whose names begin with matching |
| 4766 | TEXT. The file names are looked up in the symbol tables of this |
| 4767 | program. If the answer is no matchess, then the return value is |
| 4768 | NULL. */ |
| 4769 | |
| 4770 | VEC (char_ptr) * |
| 4771 | make_source_files_completion_list (const char *text, const char *word) |
| 4772 | { |
| 4773 | struct symtab *s; |
| 4774 | struct objfile *objfile; |
| 4775 | size_t text_len = strlen (text); |
| 4776 | VEC (char_ptr) *list = NULL; |
| 4777 | const char *base_name; |
| 4778 | struct add_partial_filename_data datum; |
| 4779 | struct filename_seen_cache *filename_seen_cache; |
| 4780 | struct cleanup *back_to, *cache_cleanup; |
| 4781 | |
| 4782 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 4783 | return list; |
| 4784 | |
| 4785 | back_to = make_cleanup (do_free_completion_list, &list); |
| 4786 | |
| 4787 | filename_seen_cache = create_filename_seen_cache (); |
| 4788 | cache_cleanup = make_cleanup (delete_filename_seen_cache, |
| 4789 | filename_seen_cache); |
| 4790 | |
| 4791 | ALL_SYMTABS (objfile, s) |
| 4792 | { |
| 4793 | if (not_interesting_fname (s->filename)) |
| 4794 | continue; |
| 4795 | if (!filename_seen (filename_seen_cache, s->filename, 1) |
| 4796 | && filename_ncmp (s->filename, text, text_len) == 0) |
| 4797 | { |
| 4798 | /* This file matches for a completion; add it to the current |
| 4799 | list of matches. */ |
| 4800 | add_filename_to_list (s->filename, text, word, &list); |
| 4801 | } |
| 4802 | else |
| 4803 | { |
| 4804 | /* NOTE: We allow the user to type a base name when the |
| 4805 | debug info records leading directories, but not the other |
| 4806 | way around. This is what subroutines of breakpoint |
| 4807 | command do when they parse file names. */ |
| 4808 | base_name = lbasename (s->filename); |
| 4809 | if (base_name != s->filename |
| 4810 | && !filename_seen (filename_seen_cache, base_name, 1) |
| 4811 | && filename_ncmp (base_name, text, text_len) == 0) |
| 4812 | add_filename_to_list (base_name, text, word, &list); |
| 4813 | } |
| 4814 | } |
| 4815 | |
| 4816 | datum.filename_seen_cache = filename_seen_cache; |
| 4817 | datum.text = text; |
| 4818 | datum.word = word; |
| 4819 | datum.text_len = text_len; |
| 4820 | datum.list = &list; |
| 4821 | map_symbol_filenames (maybe_add_partial_symtab_filename, &datum, |
| 4822 | 0 /*need_fullname*/); |
| 4823 | |
| 4824 | do_cleanups (cache_cleanup); |
| 4825 | discard_cleanups (back_to); |
| 4826 | |
| 4827 | return list; |
| 4828 | } |
| 4829 | |
| 4830 | /* Determine if PC is in the prologue of a function. The prologue is the area |
| 4831 | between the first instruction of a function, and the first executable line. |
| 4832 | Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue. |
| 4833 | |
| 4834 | If non-zero, func_start is where we think the prologue starts, possibly |
| 4835 | by previous examination of symbol table information. */ |
| 4836 | |
| 4837 | int |
| 4838 | in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start) |
| 4839 | { |
| 4840 | struct symtab_and_line sal; |
| 4841 | CORE_ADDR func_addr, func_end; |
| 4842 | |
| 4843 | /* We have several sources of information we can consult to figure |
| 4844 | this out. |
| 4845 | - Compilers usually emit line number info that marks the prologue |
| 4846 | as its own "source line". So the ending address of that "line" |
| 4847 | is the end of the prologue. If available, this is the most |
| 4848 | reliable method. |
| 4849 | - The minimal symbols and partial symbols, which can usually tell |
| 4850 | us the starting and ending addresses of a function. |
| 4851 | - If we know the function's start address, we can call the |
| 4852 | architecture-defined gdbarch_skip_prologue function to analyze the |
| 4853 | instruction stream and guess where the prologue ends. |
| 4854 | - Our `func_start' argument; if non-zero, this is the caller's |
| 4855 | best guess as to the function's entry point. At the time of |
| 4856 | this writing, handle_inferior_event doesn't get this right, so |
| 4857 | it should be our last resort. */ |
| 4858 | |
| 4859 | /* Consult the partial symbol table, to find which function |
| 4860 | the PC is in. */ |
| 4861 | if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 4862 | { |
| 4863 | CORE_ADDR prologue_end; |
| 4864 | |
| 4865 | /* We don't even have minsym information, so fall back to using |
| 4866 | func_start, if given. */ |
| 4867 | if (! func_start) |
| 4868 | return 1; /* We *might* be in a prologue. */ |
| 4869 | |
| 4870 | prologue_end = gdbarch_skip_prologue (gdbarch, func_start); |
| 4871 | |
| 4872 | return func_start <= pc && pc < prologue_end; |
| 4873 | } |
| 4874 | |
| 4875 | /* If we have line number information for the function, that's |
| 4876 | usually pretty reliable. */ |
| 4877 | sal = find_pc_line (func_addr, 0); |
| 4878 | |
| 4879 | /* Now sal describes the source line at the function's entry point, |
| 4880 | which (by convention) is the prologue. The end of that "line", |
| 4881 | sal.end, is the end of the prologue. |
| 4882 | |
| 4883 | Note that, for functions whose source code is all on a single |
| 4884 | line, the line number information doesn't always end up this way. |
| 4885 | So we must verify that our purported end-of-prologue address is |
| 4886 | *within* the function, not at its start or end. */ |
| 4887 | if (sal.line == 0 |
| 4888 | || sal.end <= func_addr |
| 4889 | || func_end <= sal.end) |
| 4890 | { |
| 4891 | /* We don't have any good line number info, so use the minsym |
| 4892 | information, together with the architecture-specific prologue |
| 4893 | scanning code. */ |
| 4894 | CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr); |
| 4895 | |
| 4896 | return func_addr <= pc && pc < prologue_end; |
| 4897 | } |
| 4898 | |
| 4899 | /* We have line number info, and it looks good. */ |
| 4900 | return func_addr <= pc && pc < sal.end; |
| 4901 | } |
| 4902 | |
| 4903 | /* Given PC at the function's start address, attempt to find the |
| 4904 | prologue end using SAL information. Return zero if the skip fails. |
| 4905 | |
| 4906 | A non-optimized prologue traditionally has one SAL for the function |
| 4907 | and a second for the function body. A single line function has |
| 4908 | them both pointing at the same line. |
| 4909 | |
| 4910 | An optimized prologue is similar but the prologue may contain |
| 4911 | instructions (SALs) from the instruction body. Need to skip those |
| 4912 | while not getting into the function body. |
| 4913 | |
| 4914 | The functions end point and an increasing SAL line are used as |
| 4915 | indicators of the prologue's endpoint. |
| 4916 | |
| 4917 | This code is based on the function refine_prologue_limit |
| 4918 | (found in ia64). */ |
| 4919 | |
| 4920 | CORE_ADDR |
| 4921 | skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr) |
| 4922 | { |
| 4923 | struct symtab_and_line prologue_sal; |
| 4924 | CORE_ADDR start_pc; |
| 4925 | CORE_ADDR end_pc; |
| 4926 | const struct block *bl; |
| 4927 | |
| 4928 | /* Get an initial range for the function. */ |
| 4929 | find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc); |
| 4930 | start_pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 4931 | |
| 4932 | prologue_sal = find_pc_line (start_pc, 0); |
| 4933 | if (prologue_sal.line != 0) |
| 4934 | { |
| 4935 | /* For languages other than assembly, treat two consecutive line |
| 4936 | entries at the same address as a zero-instruction prologue. |
| 4937 | The GNU assembler emits separate line notes for each instruction |
| 4938 | in a multi-instruction macro, but compilers generally will not |
| 4939 | do this. */ |
| 4940 | if (prologue_sal.symtab->language != language_asm) |
| 4941 | { |
| 4942 | struct linetable *linetable = LINETABLE (prologue_sal.symtab); |
| 4943 | int idx = 0; |
| 4944 | |
| 4945 | /* Skip any earlier lines, and any end-of-sequence marker |
| 4946 | from a previous function. */ |
| 4947 | while (linetable->item[idx].pc != prologue_sal.pc |
| 4948 | || linetable->item[idx].line == 0) |
| 4949 | idx++; |
| 4950 | |
| 4951 | if (idx+1 < linetable->nitems |
| 4952 | && linetable->item[idx+1].line != 0 |
| 4953 | && linetable->item[idx+1].pc == start_pc) |
| 4954 | return start_pc; |
| 4955 | } |
| 4956 | |
| 4957 | /* If there is only one sal that covers the entire function, |
| 4958 | then it is probably a single line function, like |
| 4959 | "foo(){}". */ |
| 4960 | if (prologue_sal.end >= end_pc) |
| 4961 | return 0; |
| 4962 | |
| 4963 | while (prologue_sal.end < end_pc) |
| 4964 | { |
| 4965 | struct symtab_and_line sal; |
| 4966 | |
| 4967 | sal = find_pc_line (prologue_sal.end, 0); |
| 4968 | if (sal.line == 0) |
| 4969 | break; |
| 4970 | /* Assume that a consecutive SAL for the same (or larger) |
| 4971 | line mark the prologue -> body transition. */ |
| 4972 | if (sal.line >= prologue_sal.line) |
| 4973 | break; |
| 4974 | /* Likewise if we are in a different symtab altogether |
| 4975 | (e.g. within a file included via #include). */ |
| 4976 | if (sal.symtab != prologue_sal.symtab) |
| 4977 | break; |
| 4978 | |
| 4979 | /* The line number is smaller. Check that it's from the |
| 4980 | same function, not something inlined. If it's inlined, |
| 4981 | then there is no point comparing the line numbers. */ |
| 4982 | bl = block_for_pc (prologue_sal.end); |
| 4983 | while (bl) |
| 4984 | { |
| 4985 | if (block_inlined_p (bl)) |
| 4986 | break; |
| 4987 | if (BLOCK_FUNCTION (bl)) |
| 4988 | { |
| 4989 | bl = NULL; |
| 4990 | break; |
| 4991 | } |
| 4992 | bl = BLOCK_SUPERBLOCK (bl); |
| 4993 | } |
| 4994 | if (bl != NULL) |
| 4995 | break; |
| 4996 | |
| 4997 | /* The case in which compiler's optimizer/scheduler has |
| 4998 | moved instructions into the prologue. We look ahead in |
| 4999 | the function looking for address ranges whose |
| 5000 | corresponding line number is less the first one that we |
| 5001 | found for the function. This is more conservative then |
| 5002 | refine_prologue_limit which scans a large number of SALs |
| 5003 | looking for any in the prologue. */ |
| 5004 | prologue_sal = sal; |
| 5005 | } |
| 5006 | } |
| 5007 | |
| 5008 | if (prologue_sal.end < end_pc) |
| 5009 | /* Return the end of this line, or zero if we could not find a |
| 5010 | line. */ |
| 5011 | return prologue_sal.end; |
| 5012 | else |
| 5013 | /* Don't return END_PC, which is past the end of the function. */ |
| 5014 | return prologue_sal.pc; |
| 5015 | } |
| 5016 | \f |
| 5017 | /* Track MAIN */ |
| 5018 | |
| 5019 | /* Return the "main_info" object for the current program space. If |
| 5020 | the object has not yet been created, create it and fill in some |
| 5021 | default values. */ |
| 5022 | |
| 5023 | static struct main_info * |
| 5024 | get_main_info (void) |
| 5025 | { |
| 5026 | struct main_info *info = program_space_data (current_program_space, |
| 5027 | main_progspace_key); |
| 5028 | |
| 5029 | if (info == NULL) |
| 5030 | { |
| 5031 | /* It may seem strange to store the main name in the progspace |
| 5032 | and also in whatever objfile happens to see a main name in |
| 5033 | its debug info. The reason for this is mainly historical: |
| 5034 | gdb returned "main" as the name even if no function named |
| 5035 | "main" was defined the program; and this approach lets us |
| 5036 | keep compatibility. */ |
| 5037 | info = XCNEW (struct main_info); |
| 5038 | info->language_of_main = language_unknown; |
| 5039 | set_program_space_data (current_program_space, main_progspace_key, |
| 5040 | info); |
| 5041 | } |
| 5042 | |
| 5043 | return info; |
| 5044 | } |
| 5045 | |
| 5046 | /* A cleanup to destroy a struct main_info when a progspace is |
| 5047 | destroyed. */ |
| 5048 | |
| 5049 | static void |
| 5050 | main_info_cleanup (struct program_space *pspace, void *data) |
| 5051 | { |
| 5052 | struct main_info *info = data; |
| 5053 | |
| 5054 | if (info != NULL) |
| 5055 | xfree (info->name_of_main); |
| 5056 | xfree (info); |
| 5057 | } |
| 5058 | |
| 5059 | static void |
| 5060 | set_main_name (const char *name, enum language lang) |
| 5061 | { |
| 5062 | struct main_info *info = get_main_info (); |
| 5063 | |
| 5064 | if (info->name_of_main != NULL) |
| 5065 | { |
| 5066 | xfree (info->name_of_main); |
| 5067 | info->name_of_main = NULL; |
| 5068 | info->language_of_main = language_unknown; |
| 5069 | } |
| 5070 | if (name != NULL) |
| 5071 | { |
| 5072 | info->name_of_main = xstrdup (name); |
| 5073 | info->language_of_main = lang; |
| 5074 | } |
| 5075 | } |
| 5076 | |
| 5077 | /* Deduce the name of the main procedure, and set NAME_OF_MAIN |
| 5078 | accordingly. */ |
| 5079 | |
| 5080 | static void |
| 5081 | find_main_name (void) |
| 5082 | { |
| 5083 | const char *new_main_name; |
| 5084 | struct objfile *objfile; |
| 5085 | |
| 5086 | /* First check the objfiles to see whether a debuginfo reader has |
| 5087 | picked up the appropriate main name. Historically the main name |
| 5088 | was found in a more or less random way; this approach instead |
| 5089 | relies on the order of objfile creation -- which still isn't |
| 5090 | guaranteed to get the correct answer, but is just probably more |
| 5091 | accurate. */ |
| 5092 | ALL_OBJFILES (objfile) |
| 5093 | { |
| 5094 | if (objfile->per_bfd->name_of_main != NULL) |
| 5095 | { |
| 5096 | set_main_name (objfile->per_bfd->name_of_main, |
| 5097 | objfile->per_bfd->language_of_main); |
| 5098 | return; |
| 5099 | } |
| 5100 | } |
| 5101 | |
| 5102 | /* Try to see if the main procedure is in Ada. */ |
| 5103 | /* FIXME: brobecker/2005-03-07: Another way of doing this would |
| 5104 | be to add a new method in the language vector, and call this |
| 5105 | method for each language until one of them returns a non-empty |
| 5106 | name. This would allow us to remove this hard-coded call to |
| 5107 | an Ada function. It is not clear that this is a better approach |
| 5108 | at this point, because all methods need to be written in a way |
| 5109 | such that false positives never be returned. For instance, it is |
| 5110 | important that a method does not return a wrong name for the main |
| 5111 | procedure if the main procedure is actually written in a different |
| 5112 | language. It is easy to guaranty this with Ada, since we use a |
| 5113 | special symbol generated only when the main in Ada to find the name |
| 5114 | of the main procedure. It is difficult however to see how this can |
| 5115 | be guarantied for languages such as C, for instance. This suggests |
| 5116 | that order of call for these methods becomes important, which means |
| 5117 | a more complicated approach. */ |
| 5118 | new_main_name = ada_main_name (); |
| 5119 | if (new_main_name != NULL) |
| 5120 | { |
| 5121 | set_main_name (new_main_name, language_ada); |
| 5122 | return; |
| 5123 | } |
| 5124 | |
| 5125 | new_main_name = d_main_name (); |
| 5126 | if (new_main_name != NULL) |
| 5127 | { |
| 5128 | set_main_name (new_main_name, language_d); |
| 5129 | return; |
| 5130 | } |
| 5131 | |
| 5132 | new_main_name = go_main_name (); |
| 5133 | if (new_main_name != NULL) |
| 5134 | { |
| 5135 | set_main_name (new_main_name, language_go); |
| 5136 | return; |
| 5137 | } |
| 5138 | |
| 5139 | new_main_name = pascal_main_name (); |
| 5140 | if (new_main_name != NULL) |
| 5141 | { |
| 5142 | set_main_name (new_main_name, language_pascal); |
| 5143 | return; |
| 5144 | } |
| 5145 | |
| 5146 | /* The languages above didn't identify the name of the main procedure. |
| 5147 | Fallback to "main". */ |
| 5148 | set_main_name ("main", language_unknown); |
| 5149 | } |
| 5150 | |
| 5151 | char * |
| 5152 | main_name (void) |
| 5153 | { |
| 5154 | struct main_info *info = get_main_info (); |
| 5155 | |
| 5156 | if (info->name_of_main == NULL) |
| 5157 | find_main_name (); |
| 5158 | |
| 5159 | return info->name_of_main; |
| 5160 | } |
| 5161 | |
| 5162 | /* Return the language of the main function. If it is not known, |
| 5163 | return language_unknown. */ |
| 5164 | |
| 5165 | enum language |
| 5166 | main_language (void) |
| 5167 | { |
| 5168 | struct main_info *info = get_main_info (); |
| 5169 | |
| 5170 | if (info->name_of_main == NULL) |
| 5171 | find_main_name (); |
| 5172 | |
| 5173 | return info->language_of_main; |
| 5174 | } |
| 5175 | |
| 5176 | /* Handle ``executable_changed'' events for the symtab module. */ |
| 5177 | |
| 5178 | static void |
| 5179 | symtab_observer_executable_changed (void) |
| 5180 | { |
| 5181 | /* NAME_OF_MAIN may no longer be the same, so reset it for now. */ |
| 5182 | set_main_name (NULL, language_unknown); |
| 5183 | } |
| 5184 | |
| 5185 | /* Return 1 if the supplied producer string matches the ARM RealView |
| 5186 | compiler (armcc). */ |
| 5187 | |
| 5188 | int |
| 5189 | producer_is_realview (const char *producer) |
| 5190 | { |
| 5191 | static const char *const arm_idents[] = { |
| 5192 | "ARM C Compiler, ADS", |
| 5193 | "Thumb C Compiler, ADS", |
| 5194 | "ARM C++ Compiler, ADS", |
| 5195 | "Thumb C++ Compiler, ADS", |
| 5196 | "ARM/Thumb C/C++ Compiler, RVCT", |
| 5197 | "ARM C/C++ Compiler, RVCT" |
| 5198 | }; |
| 5199 | int i; |
| 5200 | |
| 5201 | if (producer == NULL) |
| 5202 | return 0; |
| 5203 | |
| 5204 | for (i = 0; i < ARRAY_SIZE (arm_idents); i++) |
| 5205 | if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0) |
| 5206 | return 1; |
| 5207 | |
| 5208 | return 0; |
| 5209 | } |
| 5210 | |
| 5211 | \f |
| 5212 | |
| 5213 | /* The next index to hand out in response to a registration request. */ |
| 5214 | |
| 5215 | static int next_aclass_value = LOC_FINAL_VALUE; |
| 5216 | |
| 5217 | /* The maximum number of "aclass" registrations we support. This is |
| 5218 | constant for convenience. */ |
| 5219 | #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10) |
| 5220 | |
| 5221 | /* The objects representing the various "aclass" values. The elements |
| 5222 | from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent |
| 5223 | elements are those registered at gdb initialization time. */ |
| 5224 | |
| 5225 | static struct symbol_impl symbol_impl[MAX_SYMBOL_IMPLS]; |
| 5226 | |
| 5227 | /* The globally visible pointer. This is separate from 'symbol_impl' |
| 5228 | so that it can be const. */ |
| 5229 | |
| 5230 | const struct symbol_impl *symbol_impls = &symbol_impl[0]; |
| 5231 | |
| 5232 | /* Make sure we saved enough room in struct symbol. */ |
| 5233 | |
| 5234 | gdb_static_assert (MAX_SYMBOL_IMPLS <= (1 << SYMBOL_ACLASS_BITS)); |
| 5235 | |
| 5236 | /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS |
| 5237 | is the ops vector associated with this index. This returns the new |
| 5238 | index, which should be used as the aclass_index field for symbols |
| 5239 | of this type. */ |
| 5240 | |
| 5241 | int |
| 5242 | register_symbol_computed_impl (enum address_class aclass, |
| 5243 | const struct symbol_computed_ops *ops) |
| 5244 | { |
| 5245 | int result = next_aclass_value++; |
| 5246 | |
| 5247 | gdb_assert (aclass == LOC_COMPUTED); |
| 5248 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 5249 | symbol_impl[result].aclass = aclass; |
| 5250 | symbol_impl[result].ops_computed = ops; |
| 5251 | |
| 5252 | /* Sanity check OPS. */ |
| 5253 | gdb_assert (ops != NULL); |
| 5254 | gdb_assert (ops->tracepoint_var_ref != NULL); |
| 5255 | gdb_assert (ops->describe_location != NULL); |
| 5256 | gdb_assert (ops->read_needs_frame != NULL); |
| 5257 | gdb_assert (ops->read_variable != NULL); |
| 5258 | |
| 5259 | return result; |
| 5260 | } |
| 5261 | |
| 5262 | /* Register a function with frame base type. ACLASS must be LOC_BLOCK. |
| 5263 | OPS is the ops vector associated with this index. This returns the |
| 5264 | new index, which should be used as the aclass_index field for symbols |
| 5265 | of this type. */ |
| 5266 | |
| 5267 | int |
| 5268 | register_symbol_block_impl (enum address_class aclass, |
| 5269 | const struct symbol_block_ops *ops) |
| 5270 | { |
| 5271 | int result = next_aclass_value++; |
| 5272 | |
| 5273 | gdb_assert (aclass == LOC_BLOCK); |
| 5274 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 5275 | symbol_impl[result].aclass = aclass; |
| 5276 | symbol_impl[result].ops_block = ops; |
| 5277 | |
| 5278 | /* Sanity check OPS. */ |
| 5279 | gdb_assert (ops != NULL); |
| 5280 | gdb_assert (ops->find_frame_base_location != NULL); |
| 5281 | |
| 5282 | return result; |
| 5283 | } |
| 5284 | |
| 5285 | /* Register a register symbol type. ACLASS must be LOC_REGISTER or |
| 5286 | LOC_REGPARM_ADDR. OPS is the register ops vector associated with |
| 5287 | this index. This returns the new index, which should be used as |
| 5288 | the aclass_index field for symbols of this type. */ |
| 5289 | |
| 5290 | int |
| 5291 | register_symbol_register_impl (enum address_class aclass, |
| 5292 | const struct symbol_register_ops *ops) |
| 5293 | { |
| 5294 | int result = next_aclass_value++; |
| 5295 | |
| 5296 | gdb_assert (aclass == LOC_REGISTER || aclass == LOC_REGPARM_ADDR); |
| 5297 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 5298 | symbol_impl[result].aclass = aclass; |
| 5299 | symbol_impl[result].ops_register = ops; |
| 5300 | |
| 5301 | return result; |
| 5302 | } |
| 5303 | |
| 5304 | /* Initialize elements of 'symbol_impl' for the constants in enum |
| 5305 | address_class. */ |
| 5306 | |
| 5307 | static void |
| 5308 | initialize_ordinary_address_classes (void) |
| 5309 | { |
| 5310 | int i; |
| 5311 | |
| 5312 | for (i = 0; i < LOC_FINAL_VALUE; ++i) |
| 5313 | symbol_impl[i].aclass = i; |
| 5314 | } |
| 5315 | |
| 5316 | \f |
| 5317 | |
| 5318 | /* Initialize the symbol SYM. */ |
| 5319 | |
| 5320 | void |
| 5321 | initialize_symbol (struct symbol *sym) |
| 5322 | { |
| 5323 | memset (sym, 0, sizeof (*sym)); |
| 5324 | SYMBOL_SECTION (sym) = -1; |
| 5325 | } |
| 5326 | |
| 5327 | /* Allocate and initialize a new 'struct symbol' on OBJFILE's |
| 5328 | obstack. */ |
| 5329 | |
| 5330 | struct symbol * |
| 5331 | allocate_symbol (struct objfile *objfile) |
| 5332 | { |
| 5333 | struct symbol *result; |
| 5334 | |
| 5335 | result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol); |
| 5336 | SYMBOL_SECTION (result) = -1; |
| 5337 | |
| 5338 | return result; |
| 5339 | } |
| 5340 | |
| 5341 | /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's |
| 5342 | obstack. */ |
| 5343 | |
| 5344 | struct template_symbol * |
| 5345 | allocate_template_symbol (struct objfile *objfile) |
| 5346 | { |
| 5347 | struct template_symbol *result; |
| 5348 | |
| 5349 | result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct template_symbol); |
| 5350 | SYMBOL_SECTION (&result->base) = -1; |
| 5351 | |
| 5352 | return result; |
| 5353 | } |
| 5354 | |
| 5355 | \f |
| 5356 | |
| 5357 | void |
| 5358 | _initialize_symtab (void) |
| 5359 | { |
| 5360 | initialize_ordinary_address_classes (); |
| 5361 | |
| 5362 | main_progspace_key |
| 5363 | = register_program_space_data_with_cleanup (NULL, main_info_cleanup); |
| 5364 | |
| 5365 | add_info ("variables", variables_info, _("\ |
| 5366 | All global and static variable names, or those matching REGEXP.")); |
| 5367 | if (dbx_commands) |
| 5368 | add_com ("whereis", class_info, variables_info, _("\ |
| 5369 | All global and static variable names, or those matching REGEXP.")); |
| 5370 | |
| 5371 | add_info ("functions", functions_info, |
| 5372 | _("All function names, or those matching REGEXP.")); |
| 5373 | |
| 5374 | /* FIXME: This command has at least the following problems: |
| 5375 | 1. It prints builtin types (in a very strange and confusing fashion). |
| 5376 | 2. It doesn't print right, e.g. with |
| 5377 | typedef struct foo *FOO |
| 5378 | type_print prints "FOO" when we want to make it (in this situation) |
| 5379 | print "struct foo *". |
| 5380 | I also think "ptype" or "whatis" is more likely to be useful (but if |
| 5381 | there is much disagreement "info types" can be fixed). */ |
| 5382 | add_info ("types", types_info, |
| 5383 | _("All type names, or those matching REGEXP.")); |
| 5384 | |
| 5385 | add_info ("sources", sources_info, |
| 5386 | _("Source files in the program.")); |
| 5387 | |
| 5388 | add_com ("rbreak", class_breakpoint, rbreak_command, |
| 5389 | _("Set a breakpoint for all functions matching REGEXP.")); |
| 5390 | |
| 5391 | if (xdb_commands) |
| 5392 | { |
| 5393 | add_com ("lf", class_info, sources_info, |
| 5394 | _("Source files in the program")); |
| 5395 | add_com ("lg", class_info, variables_info, _("\ |
| 5396 | All global and static variable names, or those matching REGEXP.")); |
| 5397 | } |
| 5398 | |
| 5399 | add_setshow_enum_cmd ("multiple-symbols", no_class, |
| 5400 | multiple_symbols_modes, &multiple_symbols_mode, |
| 5401 | _("\ |
| 5402 | Set the debugger behavior when more than one symbol are possible matches\n\ |
| 5403 | in an expression."), _("\ |
| 5404 | Show how the debugger handles ambiguities in expressions."), _("\ |
| 5405 | Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."), |
| 5406 | NULL, NULL, &setlist, &showlist); |
| 5407 | |
| 5408 | add_setshow_boolean_cmd ("basenames-may-differ", class_obscure, |
| 5409 | &basenames_may_differ, _("\ |
| 5410 | Set whether a source file may have multiple base names."), _("\ |
| 5411 | Show whether a source file may have multiple base names."), _("\ |
| 5412 | (A \"base name\" is the name of a file with the directory part removed.\n\ |
| 5413 | Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\ |
| 5414 | If set, GDB will canonicalize file names (e.g., expand symlinks)\n\ |
| 5415 | before comparing them. Canonicalization is an expensive operation,\n\ |
| 5416 | but it allows the same file be known by more than one base name.\n\ |
| 5417 | If not set (the default), all source files are assumed to have just\n\ |
| 5418 | one base name, and gdb will do file name comparisons more efficiently."), |
| 5419 | NULL, NULL, |
| 5420 | &setlist, &showlist); |
| 5421 | |
| 5422 | add_setshow_zuinteger_cmd ("symtab-create", no_class, &symtab_create_debug, |
| 5423 | _("Set debugging of symbol table creation."), |
| 5424 | _("Show debugging of symbol table creation."), _("\ |
| 5425 | When enabled (non-zero), debugging messages are printed when building\n\ |
| 5426 | symbol tables. A value of 1 (one) normally provides enough information.\n\ |
| 5427 | A value greater than 1 provides more verbose information."), |
| 5428 | NULL, |
| 5429 | NULL, |
| 5430 | &setdebuglist, &showdebuglist); |
| 5431 | |
| 5432 | observer_attach_executable_changed (symtab_observer_executable_changed); |
| 5433 | } |