| 1 | /* Symbol table lookup for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #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 | #include "cli/cli-style.h" |
| 45 | #include "fnmatch.h" |
| 46 | #include "hashtab.h" |
| 47 | #include "typeprint.h" |
| 48 | |
| 49 | #include "gdb_obstack.h" |
| 50 | #include "block.h" |
| 51 | #include "dictionary.h" |
| 52 | |
| 53 | #include <sys/types.h> |
| 54 | #include <fcntl.h> |
| 55 | #include <sys/stat.h> |
| 56 | #include <ctype.h> |
| 57 | #include "cp-abi.h" |
| 58 | #include "cp-support.h" |
| 59 | #include "observable.h" |
| 60 | #include "solist.h" |
| 61 | #include "macrotab.h" |
| 62 | #include "macroscope.h" |
| 63 | |
| 64 | #include "parser-defs.h" |
| 65 | #include "completer.h" |
| 66 | #include "progspace-and-thread.h" |
| 67 | #include "gdbsupport/gdb_optional.h" |
| 68 | #include "filename-seen-cache.h" |
| 69 | #include "arch-utils.h" |
| 70 | #include <algorithm> |
| 71 | #include "gdbsupport/gdb_string_view.h" |
| 72 | #include "gdbsupport/pathstuff.h" |
| 73 | #include "gdbsupport/common-utils.h" |
| 74 | |
| 75 | /* Forward declarations for local functions. */ |
| 76 | |
| 77 | static void rbreak_command (const char *, int); |
| 78 | |
| 79 | static int find_line_common (struct linetable *, int, int *, int); |
| 80 | |
| 81 | static struct block_symbol |
| 82 | lookup_symbol_aux (const char *name, |
| 83 | symbol_name_match_type match_type, |
| 84 | const struct block *block, |
| 85 | const domain_enum domain, |
| 86 | enum language language, |
| 87 | struct field_of_this_result *); |
| 88 | |
| 89 | static |
| 90 | struct block_symbol lookup_local_symbol (const char *name, |
| 91 | symbol_name_match_type match_type, |
| 92 | const struct block *block, |
| 93 | const domain_enum domain, |
| 94 | enum language language); |
| 95 | |
| 96 | static struct block_symbol |
| 97 | lookup_symbol_in_objfile (struct objfile *objfile, |
| 98 | enum block_enum block_index, |
| 99 | const char *name, const domain_enum domain); |
| 100 | |
| 101 | /* Type of the data stored on the program space. */ |
| 102 | |
| 103 | struct main_info |
| 104 | { |
| 105 | main_info () = default; |
| 106 | |
| 107 | ~main_info () |
| 108 | { |
| 109 | xfree (name_of_main); |
| 110 | } |
| 111 | |
| 112 | /* Name of "main". */ |
| 113 | |
| 114 | char *name_of_main = nullptr; |
| 115 | |
| 116 | /* Language of "main". */ |
| 117 | |
| 118 | enum language language_of_main = language_unknown; |
| 119 | }; |
| 120 | |
| 121 | /* Program space key for finding name and language of "main". */ |
| 122 | |
| 123 | static const program_space_key<main_info> main_progspace_key; |
| 124 | |
| 125 | /* The default symbol cache size. |
| 126 | There is no extra cpu cost for large N (except when flushing the cache, |
| 127 | which is rare). The value here is just a first attempt. A better default |
| 128 | value may be higher or lower. A prime number can make up for a bad hash |
| 129 | computation, so that's why the number is what it is. */ |
| 130 | #define DEFAULT_SYMBOL_CACHE_SIZE 1021 |
| 131 | |
| 132 | /* The maximum symbol cache size. |
| 133 | There's no method to the decision of what value to use here, other than |
| 134 | there's no point in allowing a user typo to make gdb consume all memory. */ |
| 135 | #define MAX_SYMBOL_CACHE_SIZE (1024*1024) |
| 136 | |
| 137 | /* symbol_cache_lookup returns this if a previous lookup failed to find the |
| 138 | symbol in any objfile. */ |
| 139 | #define SYMBOL_LOOKUP_FAILED \ |
| 140 | ((struct block_symbol) {(struct symbol *) 1, NULL}) |
| 141 | #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1) |
| 142 | |
| 143 | /* Recording lookups that don't find the symbol is just as important, if not |
| 144 | more so, than recording found symbols. */ |
| 145 | |
| 146 | enum symbol_cache_slot_state |
| 147 | { |
| 148 | SYMBOL_SLOT_UNUSED, |
| 149 | SYMBOL_SLOT_NOT_FOUND, |
| 150 | SYMBOL_SLOT_FOUND |
| 151 | }; |
| 152 | |
| 153 | struct symbol_cache_slot |
| 154 | { |
| 155 | enum symbol_cache_slot_state state; |
| 156 | |
| 157 | /* The objfile that was current when the symbol was looked up. |
| 158 | This is only needed for global blocks, but for simplicity's sake |
| 159 | we allocate the space for both. If data shows the extra space used |
| 160 | for static blocks is a problem, we can split things up then. |
| 161 | |
| 162 | Global blocks need cache lookup to include the objfile context because |
| 163 | we need to account for gdbarch_iterate_over_objfiles_in_search_order |
| 164 | which can traverse objfiles in, effectively, any order, depending on |
| 165 | the current objfile, thus affecting which symbol is found. Normally, |
| 166 | only the current objfile is searched first, and then the rest are |
| 167 | searched in recorded order; but putting cache lookup inside |
| 168 | gdbarch_iterate_over_objfiles_in_search_order would be awkward. |
| 169 | Instead we just make the current objfile part of the context of |
| 170 | cache lookup. This means we can record the same symbol multiple times, |
| 171 | each with a different "current objfile" that was in effect when the |
| 172 | lookup was saved in the cache, but cache space is pretty cheap. */ |
| 173 | const struct objfile *objfile_context; |
| 174 | |
| 175 | union |
| 176 | { |
| 177 | struct block_symbol found; |
| 178 | struct |
| 179 | { |
| 180 | char *name; |
| 181 | domain_enum domain; |
| 182 | } not_found; |
| 183 | } value; |
| 184 | }; |
| 185 | |
| 186 | /* Clear out SLOT. */ |
| 187 | |
| 188 | static void |
| 189 | symbol_cache_clear_slot (struct symbol_cache_slot *slot) |
| 190 | { |
| 191 | if (slot->state == SYMBOL_SLOT_NOT_FOUND) |
| 192 | xfree (slot->value.not_found.name); |
| 193 | slot->state = SYMBOL_SLOT_UNUSED; |
| 194 | } |
| 195 | |
| 196 | /* Symbols don't specify global vs static block. |
| 197 | So keep them in separate caches. */ |
| 198 | |
| 199 | struct block_symbol_cache |
| 200 | { |
| 201 | unsigned int hits; |
| 202 | unsigned int misses; |
| 203 | unsigned int collisions; |
| 204 | |
| 205 | /* SYMBOLS is a variable length array of this size. |
| 206 | One can imagine that in general one cache (global/static) should be a |
| 207 | fraction of the size of the other, but there's no data at the moment |
| 208 | on which to decide. */ |
| 209 | unsigned int size; |
| 210 | |
| 211 | struct symbol_cache_slot symbols[1]; |
| 212 | }; |
| 213 | |
| 214 | /* Clear all slots of BSC and free BSC. */ |
| 215 | |
| 216 | static void |
| 217 | destroy_block_symbol_cache (struct block_symbol_cache *bsc) |
| 218 | { |
| 219 | if (bsc != nullptr) |
| 220 | { |
| 221 | for (unsigned int i = 0; i < bsc->size; i++) |
| 222 | symbol_cache_clear_slot (&bsc->symbols[i]); |
| 223 | xfree (bsc); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* The symbol cache. |
| 228 | |
| 229 | Searching for symbols in the static and global blocks over multiple objfiles |
| 230 | again and again can be slow, as can searching very big objfiles. This is a |
| 231 | simple cache to improve symbol lookup performance, which is critical to |
| 232 | overall gdb performance. |
| 233 | |
| 234 | Symbols are hashed on the name, its domain, and block. |
| 235 | They are also hashed on their objfile for objfile-specific lookups. */ |
| 236 | |
| 237 | struct symbol_cache |
| 238 | { |
| 239 | symbol_cache () = default; |
| 240 | |
| 241 | ~symbol_cache () |
| 242 | { |
| 243 | destroy_block_symbol_cache (global_symbols); |
| 244 | destroy_block_symbol_cache (static_symbols); |
| 245 | } |
| 246 | |
| 247 | struct block_symbol_cache *global_symbols = nullptr; |
| 248 | struct block_symbol_cache *static_symbols = nullptr; |
| 249 | }; |
| 250 | |
| 251 | /* Program space key for finding its symbol cache. */ |
| 252 | |
| 253 | static const program_space_key<symbol_cache> symbol_cache_key; |
| 254 | |
| 255 | /* When non-zero, print debugging messages related to symtab creation. */ |
| 256 | unsigned int symtab_create_debug = 0; |
| 257 | |
| 258 | /* When non-zero, print debugging messages related to symbol lookup. */ |
| 259 | unsigned int symbol_lookup_debug = 0; |
| 260 | |
| 261 | /* The size of the cache is staged here. */ |
| 262 | static unsigned int new_symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE; |
| 263 | |
| 264 | /* The current value of the symbol cache size. |
| 265 | This is saved so that if the user enters a value too big we can restore |
| 266 | the original value from here. */ |
| 267 | static unsigned int symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE; |
| 268 | |
| 269 | /* True if a file may be known by two different basenames. |
| 270 | This is the uncommon case, and significantly slows down gdb. |
| 271 | Default set to "off" to not slow down the common case. */ |
| 272 | bool basenames_may_differ = false; |
| 273 | |
| 274 | /* Allow the user to configure the debugger behavior with respect |
| 275 | to multiple-choice menus when more than one symbol matches during |
| 276 | a symbol lookup. */ |
| 277 | |
| 278 | const char multiple_symbols_ask[] = "ask"; |
| 279 | const char multiple_symbols_all[] = "all"; |
| 280 | const char multiple_symbols_cancel[] = "cancel"; |
| 281 | static const char *const multiple_symbols_modes[] = |
| 282 | { |
| 283 | multiple_symbols_ask, |
| 284 | multiple_symbols_all, |
| 285 | multiple_symbols_cancel, |
| 286 | NULL |
| 287 | }; |
| 288 | static const char *multiple_symbols_mode = multiple_symbols_all; |
| 289 | |
| 290 | /* Read-only accessor to AUTO_SELECT_MODE. */ |
| 291 | |
| 292 | const char * |
| 293 | multiple_symbols_select_mode (void) |
| 294 | { |
| 295 | return multiple_symbols_mode; |
| 296 | } |
| 297 | |
| 298 | /* Return the name of a domain_enum. */ |
| 299 | |
| 300 | const char * |
| 301 | domain_name (domain_enum e) |
| 302 | { |
| 303 | switch (e) |
| 304 | { |
| 305 | case UNDEF_DOMAIN: return "UNDEF_DOMAIN"; |
| 306 | case VAR_DOMAIN: return "VAR_DOMAIN"; |
| 307 | case STRUCT_DOMAIN: return "STRUCT_DOMAIN"; |
| 308 | case MODULE_DOMAIN: return "MODULE_DOMAIN"; |
| 309 | case LABEL_DOMAIN: return "LABEL_DOMAIN"; |
| 310 | case COMMON_BLOCK_DOMAIN: return "COMMON_BLOCK_DOMAIN"; |
| 311 | default: gdb_assert_not_reached ("bad domain_enum"); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | /* Return the name of a search_domain . */ |
| 316 | |
| 317 | const char * |
| 318 | search_domain_name (enum search_domain e) |
| 319 | { |
| 320 | switch (e) |
| 321 | { |
| 322 | case VARIABLES_DOMAIN: return "VARIABLES_DOMAIN"; |
| 323 | case FUNCTIONS_DOMAIN: return "FUNCTIONS_DOMAIN"; |
| 324 | case TYPES_DOMAIN: return "TYPES_DOMAIN"; |
| 325 | case MODULES_DOMAIN: return "MODULES_DOMAIN"; |
| 326 | case ALL_DOMAIN: return "ALL_DOMAIN"; |
| 327 | default: gdb_assert_not_reached ("bad search_domain"); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* See symtab.h. */ |
| 332 | |
| 333 | struct symtab * |
| 334 | compunit_primary_filetab (const struct compunit_symtab *cust) |
| 335 | { |
| 336 | gdb_assert (COMPUNIT_FILETABS (cust) != NULL); |
| 337 | |
| 338 | /* The primary file symtab is the first one in the list. */ |
| 339 | return COMPUNIT_FILETABS (cust); |
| 340 | } |
| 341 | |
| 342 | /* See symtab.h. */ |
| 343 | |
| 344 | enum language |
| 345 | compunit_language (const struct compunit_symtab *cust) |
| 346 | { |
| 347 | struct symtab *symtab = compunit_primary_filetab (cust); |
| 348 | |
| 349 | /* The language of the compunit symtab is the language of its primary |
| 350 | source file. */ |
| 351 | return SYMTAB_LANGUAGE (symtab); |
| 352 | } |
| 353 | |
| 354 | /* See symtab.h. */ |
| 355 | |
| 356 | bool |
| 357 | minimal_symbol::data_p () const |
| 358 | { |
| 359 | return type == mst_data |
| 360 | || type == mst_bss |
| 361 | || type == mst_abs |
| 362 | || type == mst_file_data |
| 363 | || type == mst_file_bss; |
| 364 | } |
| 365 | |
| 366 | /* See symtab.h. */ |
| 367 | |
| 368 | bool |
| 369 | minimal_symbol::text_p () const |
| 370 | { |
| 371 | return type == mst_text |
| 372 | || type == mst_text_gnu_ifunc |
| 373 | || type == mst_data_gnu_ifunc |
| 374 | || type == mst_slot_got_plt |
| 375 | || type == mst_solib_trampoline |
| 376 | || type == mst_file_text; |
| 377 | } |
| 378 | |
| 379 | /* See whether FILENAME matches SEARCH_NAME using the rule that we |
| 380 | advertise to the user. (The manual's description of linespecs |
| 381 | describes what we advertise). Returns true if they match, false |
| 382 | otherwise. */ |
| 383 | |
| 384 | bool |
| 385 | compare_filenames_for_search (const char *filename, const char *search_name) |
| 386 | { |
| 387 | int len = strlen (filename); |
| 388 | size_t search_len = strlen (search_name); |
| 389 | |
| 390 | if (len < search_len) |
| 391 | return false; |
| 392 | |
| 393 | /* The tail of FILENAME must match. */ |
| 394 | if (FILENAME_CMP (filename + len - search_len, search_name) != 0) |
| 395 | return false; |
| 396 | |
| 397 | /* Either the names must completely match, or the character |
| 398 | preceding the trailing SEARCH_NAME segment of FILENAME must be a |
| 399 | directory separator. |
| 400 | |
| 401 | The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c" |
| 402 | cannot match FILENAME "/path//dir/file.c" - as user has requested |
| 403 | absolute path. The sama applies for "c:\file.c" possibly |
| 404 | incorrectly hypothetically matching "d:\dir\c:\file.c". |
| 405 | |
| 406 | The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c" |
| 407 | compatible with SEARCH_NAME "file.c". In such case a compiler had |
| 408 | to put the "c:file.c" name into debug info. Such compatibility |
| 409 | works only on GDB built for DOS host. */ |
| 410 | return (len == search_len |
| 411 | || (!IS_ABSOLUTE_PATH (search_name) |
| 412 | && IS_DIR_SEPARATOR (filename[len - search_len - 1])) |
| 413 | || (HAS_DRIVE_SPEC (filename) |
| 414 | && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len])); |
| 415 | } |
| 416 | |
| 417 | /* Same as compare_filenames_for_search, but for glob-style patterns. |
| 418 | Heads up on the order of the arguments. They match the order of |
| 419 | compare_filenames_for_search, but it's the opposite of the order of |
| 420 | arguments to gdb_filename_fnmatch. */ |
| 421 | |
| 422 | bool |
| 423 | compare_glob_filenames_for_search (const char *filename, |
| 424 | const char *search_name) |
| 425 | { |
| 426 | /* We rely on the property of glob-style patterns with FNM_FILE_NAME that |
| 427 | all /s have to be explicitly specified. */ |
| 428 | int file_path_elements = count_path_elements (filename); |
| 429 | int search_path_elements = count_path_elements (search_name); |
| 430 | |
| 431 | if (search_path_elements > file_path_elements) |
| 432 | return false; |
| 433 | |
| 434 | if (IS_ABSOLUTE_PATH (search_name)) |
| 435 | { |
| 436 | return (search_path_elements == file_path_elements |
| 437 | && gdb_filename_fnmatch (search_name, filename, |
| 438 | FNM_FILE_NAME | FNM_NOESCAPE) == 0); |
| 439 | } |
| 440 | |
| 441 | { |
| 442 | const char *file_to_compare |
| 443 | = strip_leading_path_elements (filename, |
| 444 | file_path_elements - search_path_elements); |
| 445 | |
| 446 | return gdb_filename_fnmatch (search_name, file_to_compare, |
| 447 | FNM_FILE_NAME | FNM_NOESCAPE) == 0; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | /* Check for a symtab of a specific name by searching some symtabs. |
| 452 | This is a helper function for callbacks of iterate_over_symtabs. |
| 453 | |
| 454 | If NAME is not absolute, then REAL_PATH is NULL |
| 455 | If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME. |
| 456 | |
| 457 | The return value, NAME, REAL_PATH and CALLBACK are identical to the |
| 458 | `map_symtabs_matching_filename' method of quick_symbol_functions. |
| 459 | |
| 460 | FIRST and AFTER_LAST indicate the range of compunit symtabs to search. |
| 461 | Each symtab within the specified compunit symtab is also searched. |
| 462 | AFTER_LAST is one past the last compunit symtab to search; NULL means to |
| 463 | search until the end of the list. */ |
| 464 | |
| 465 | bool |
| 466 | iterate_over_some_symtabs (const char *name, |
| 467 | const char *real_path, |
| 468 | struct compunit_symtab *first, |
| 469 | struct compunit_symtab *after_last, |
| 470 | gdb::function_view<bool (symtab *)> callback) |
| 471 | { |
| 472 | struct compunit_symtab *cust; |
| 473 | const char* base_name = lbasename (name); |
| 474 | |
| 475 | for (cust = first; cust != NULL && cust != after_last; cust = cust->next) |
| 476 | { |
| 477 | for (symtab *s : compunit_filetabs (cust)) |
| 478 | { |
| 479 | if (compare_filenames_for_search (s->filename, name)) |
| 480 | { |
| 481 | if (callback (s)) |
| 482 | return true; |
| 483 | continue; |
| 484 | } |
| 485 | |
| 486 | /* Before we invoke realpath, which can get expensive when many |
| 487 | files are involved, do a quick comparison of the basenames. */ |
| 488 | if (! basenames_may_differ |
| 489 | && FILENAME_CMP (base_name, lbasename (s->filename)) != 0) |
| 490 | continue; |
| 491 | |
| 492 | if (compare_filenames_for_search (symtab_to_fullname (s), name)) |
| 493 | { |
| 494 | if (callback (s)) |
| 495 | return true; |
| 496 | continue; |
| 497 | } |
| 498 | |
| 499 | /* If the user gave us an absolute path, try to find the file in |
| 500 | this symtab and use its absolute path. */ |
| 501 | if (real_path != NULL) |
| 502 | { |
| 503 | const char *fullname = symtab_to_fullname (s); |
| 504 | |
| 505 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
| 506 | gdb_assert (IS_ABSOLUTE_PATH (name)); |
| 507 | gdb::unique_xmalloc_ptr<char> fullname_real_path |
| 508 | = gdb_realpath (fullname); |
| 509 | fullname = fullname_real_path.get (); |
| 510 | if (FILENAME_CMP (real_path, fullname) == 0) |
| 511 | { |
| 512 | if (callback (s)) |
| 513 | return true; |
| 514 | continue; |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | return false; |
| 521 | } |
| 522 | |
| 523 | /* Check for a symtab of a specific name; first in symtabs, then in |
| 524 | psymtabs. *If* there is no '/' in the name, a match after a '/' |
| 525 | in the symtab filename will also work. |
| 526 | |
| 527 | Calls CALLBACK with each symtab that is found. If CALLBACK returns |
| 528 | true, the search stops. */ |
| 529 | |
| 530 | void |
| 531 | iterate_over_symtabs (const char *name, |
| 532 | gdb::function_view<bool (symtab *)> callback) |
| 533 | { |
| 534 | gdb::unique_xmalloc_ptr<char> real_path; |
| 535 | |
| 536 | /* Here we are interested in canonicalizing an absolute path, not |
| 537 | absolutizing a relative path. */ |
| 538 | if (IS_ABSOLUTE_PATH (name)) |
| 539 | { |
| 540 | real_path = gdb_realpath (name); |
| 541 | gdb_assert (IS_ABSOLUTE_PATH (real_path.get ())); |
| 542 | } |
| 543 | |
| 544 | for (objfile *objfile : current_program_space->objfiles ()) |
| 545 | { |
| 546 | if (iterate_over_some_symtabs (name, real_path.get (), |
| 547 | objfile->compunit_symtabs, NULL, |
| 548 | callback)) |
| 549 | return; |
| 550 | } |
| 551 | |
| 552 | /* Same search rules as above apply here, but now we look thru the |
| 553 | psymtabs. */ |
| 554 | |
| 555 | for (objfile *objfile : current_program_space->objfiles ()) |
| 556 | { |
| 557 | if (objfile->sf |
| 558 | && objfile->sf->qf->map_symtabs_matching_filename (objfile, |
| 559 | name, |
| 560 | real_path.get (), |
| 561 | callback)) |
| 562 | return; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* A wrapper for iterate_over_symtabs that returns the first matching |
| 567 | symtab, or NULL. */ |
| 568 | |
| 569 | struct symtab * |
| 570 | lookup_symtab (const char *name) |
| 571 | { |
| 572 | struct symtab *result = NULL; |
| 573 | |
| 574 | iterate_over_symtabs (name, [&] (symtab *symtab) |
| 575 | { |
| 576 | result = symtab; |
| 577 | return true; |
| 578 | }); |
| 579 | |
| 580 | return result; |
| 581 | } |
| 582 | |
| 583 | \f |
| 584 | /* Mangle a GDB method stub type. This actually reassembles the pieces of the |
| 585 | full method name, which consist of the class name (from T), the unadorned |
| 586 | method name from METHOD_ID, and the signature for the specific overload, |
| 587 | specified by SIGNATURE_ID. Note that this function is g++ specific. */ |
| 588 | |
| 589 | char * |
| 590 | gdb_mangle_name (struct type *type, int method_id, int signature_id) |
| 591 | { |
| 592 | int mangled_name_len; |
| 593 | char *mangled_name; |
| 594 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id); |
| 595 | struct fn_field *method = &f[signature_id]; |
| 596 | const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id); |
| 597 | const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id); |
| 598 | const char *newname = TYPE_NAME (type); |
| 599 | |
| 600 | /* Does the form of physname indicate that it is the full mangled name |
| 601 | of a constructor (not just the args)? */ |
| 602 | int is_full_physname_constructor; |
| 603 | |
| 604 | int is_constructor; |
| 605 | int is_destructor = is_destructor_name (physname); |
| 606 | /* Need a new type prefix. */ |
| 607 | const char *const_prefix = method->is_const ? "C" : ""; |
| 608 | const char *volatile_prefix = method->is_volatile ? "V" : ""; |
| 609 | char buf[20]; |
| 610 | int len = (newname == NULL ? 0 : strlen (newname)); |
| 611 | |
| 612 | /* Nothing to do if physname already contains a fully mangled v3 abi name |
| 613 | or an operator name. */ |
| 614 | if ((physname[0] == '_' && physname[1] == 'Z') |
| 615 | || is_operator_name (field_name)) |
| 616 | return xstrdup (physname); |
| 617 | |
| 618 | is_full_physname_constructor = is_constructor_name (physname); |
| 619 | |
| 620 | is_constructor = is_full_physname_constructor |
| 621 | || (newname && strcmp (field_name, newname) == 0); |
| 622 | |
| 623 | if (!is_destructor) |
| 624 | is_destructor = (startswith (physname, "__dt")); |
| 625 | |
| 626 | if (is_destructor || is_full_physname_constructor) |
| 627 | { |
| 628 | mangled_name = (char *) xmalloc (strlen (physname) + 1); |
| 629 | strcpy (mangled_name, physname); |
| 630 | return mangled_name; |
| 631 | } |
| 632 | |
| 633 | if (len == 0) |
| 634 | { |
| 635 | xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix); |
| 636 | } |
| 637 | else if (physname[0] == 't' || physname[0] == 'Q') |
| 638 | { |
| 639 | /* The physname for template and qualified methods already includes |
| 640 | the class name. */ |
| 641 | xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix); |
| 642 | newname = NULL; |
| 643 | len = 0; |
| 644 | } |
| 645 | else |
| 646 | { |
| 647 | xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix, |
| 648 | volatile_prefix, len); |
| 649 | } |
| 650 | mangled_name_len = ((is_constructor ? 0 : strlen (field_name)) |
| 651 | + strlen (buf) + len + strlen (physname) + 1); |
| 652 | |
| 653 | mangled_name = (char *) xmalloc (mangled_name_len); |
| 654 | if (is_constructor) |
| 655 | mangled_name[0] = '\0'; |
| 656 | else |
| 657 | strcpy (mangled_name, field_name); |
| 658 | |
| 659 | strcat (mangled_name, buf); |
| 660 | /* If the class doesn't have a name, i.e. newname NULL, then we just |
| 661 | mangle it using 0 for the length of the class. Thus it gets mangled |
| 662 | as something starting with `::' rather than `classname::'. */ |
| 663 | if (newname != NULL) |
| 664 | strcat (mangled_name, newname); |
| 665 | |
| 666 | strcat (mangled_name, physname); |
| 667 | return (mangled_name); |
| 668 | } |
| 669 | |
| 670 | /* See symtab.h. */ |
| 671 | |
| 672 | void |
| 673 | general_symbol_info::set_demangled_name (const char *name, |
| 674 | struct obstack *obstack) |
| 675 | { |
| 676 | if (language () == language_ada) |
| 677 | { |
| 678 | if (name == NULL) |
| 679 | { |
| 680 | ada_mangled = 0; |
| 681 | language_specific.obstack = obstack; |
| 682 | } |
| 683 | else |
| 684 | { |
| 685 | ada_mangled = 1; |
| 686 | language_specific.demangled_name = name; |
| 687 | } |
| 688 | } |
| 689 | else |
| 690 | language_specific.demangled_name = name; |
| 691 | } |
| 692 | |
| 693 | \f |
| 694 | /* Initialize the language dependent portion of a symbol |
| 695 | depending upon the language for the symbol. */ |
| 696 | |
| 697 | void |
| 698 | general_symbol_info::set_language (enum language language, |
| 699 | struct obstack *obstack) |
| 700 | { |
| 701 | m_language = language; |
| 702 | if (language == language_cplus |
| 703 | || language == language_d |
| 704 | || language == language_go |
| 705 | || language == language_objc |
| 706 | || language == language_fortran) |
| 707 | { |
| 708 | set_demangled_name (NULL, obstack); |
| 709 | } |
| 710 | else if (language == language_ada) |
| 711 | { |
| 712 | gdb_assert (ada_mangled == 0); |
| 713 | language_specific.obstack = obstack; |
| 714 | } |
| 715 | else |
| 716 | { |
| 717 | memset (&language_specific, 0, sizeof (language_specific)); |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | /* Functions to initialize a symbol's mangled name. */ |
| 722 | |
| 723 | /* Objects of this type are stored in the demangled name hash table. */ |
| 724 | struct demangled_name_entry |
| 725 | { |
| 726 | demangled_name_entry (gdb::string_view mangled_name) |
| 727 | : mangled (mangled_name) {} |
| 728 | |
| 729 | gdb::string_view mangled; |
| 730 | enum language language; |
| 731 | gdb::unique_xmalloc_ptr<char> demangled; |
| 732 | }; |
| 733 | |
| 734 | /* Hash function for the demangled name hash. */ |
| 735 | |
| 736 | static hashval_t |
| 737 | hash_demangled_name_entry (const void *data) |
| 738 | { |
| 739 | const struct demangled_name_entry *e |
| 740 | = (const struct demangled_name_entry *) data; |
| 741 | |
| 742 | return fast_hash (e->mangled.data (), e->mangled.length ()); |
| 743 | } |
| 744 | |
| 745 | /* Equality function for the demangled name hash. */ |
| 746 | |
| 747 | static int |
| 748 | eq_demangled_name_entry (const void *a, const void *b) |
| 749 | { |
| 750 | const struct demangled_name_entry *da |
| 751 | = (const struct demangled_name_entry *) a; |
| 752 | const struct demangled_name_entry *db |
| 753 | = (const struct demangled_name_entry *) b; |
| 754 | |
| 755 | return da->mangled == db->mangled; |
| 756 | } |
| 757 | |
| 758 | static void |
| 759 | free_demangled_name_entry (void *data) |
| 760 | { |
| 761 | struct demangled_name_entry *e |
| 762 | = (struct demangled_name_entry *) data; |
| 763 | |
| 764 | e->~demangled_name_entry(); |
| 765 | } |
| 766 | |
| 767 | /* Create the hash table used for demangled names. Each hash entry is |
| 768 | a pair of strings; one for the mangled name and one for the demangled |
| 769 | name. The entry is hashed via just the mangled name. */ |
| 770 | |
| 771 | static void |
| 772 | create_demangled_names_hash (struct objfile_per_bfd_storage *per_bfd) |
| 773 | { |
| 774 | /* Choose 256 as the starting size of the hash table, somewhat arbitrarily. |
| 775 | The hash table code will round this up to the next prime number. |
| 776 | Choosing a much larger table size wastes memory, and saves only about |
| 777 | 1% in symbol reading. However, if the minsym count is already |
| 778 | initialized (e.g. because symbol name setting was deferred to |
| 779 | a background thread) we can initialize the hashtable with a count |
| 780 | based on that, because we will almost certainly have at least that |
| 781 | many entries. If we have a nonzero number but less than 256, |
| 782 | we still stay with 256 to have some space for psymbols, etc. */ |
| 783 | |
| 784 | /* htab will expand the table when it is 3/4th full, so we account for that |
| 785 | here. +2 to round up. */ |
| 786 | int minsym_based_count = (per_bfd->minimal_symbol_count + 2) / 3 * 4; |
| 787 | int count = std::max (per_bfd->minimal_symbol_count, minsym_based_count); |
| 788 | |
| 789 | per_bfd->demangled_names_hash.reset (htab_create_alloc |
| 790 | (count, hash_demangled_name_entry, eq_demangled_name_entry, |
| 791 | free_demangled_name_entry, xcalloc, xfree)); |
| 792 | } |
| 793 | |
| 794 | /* See symtab.h */ |
| 795 | |
| 796 | char * |
| 797 | symbol_find_demangled_name (struct general_symbol_info *gsymbol, |
| 798 | const char *mangled) |
| 799 | { |
| 800 | char *demangled = NULL; |
| 801 | int i; |
| 802 | |
| 803 | if (gsymbol->language () == language_unknown) |
| 804 | gsymbol->m_language = language_auto; |
| 805 | |
| 806 | if (gsymbol->language () != language_auto) |
| 807 | { |
| 808 | const struct language_defn *lang = language_def (gsymbol->language ()); |
| 809 | |
| 810 | language_sniff_from_mangled_name (lang, mangled, &demangled); |
| 811 | return demangled; |
| 812 | } |
| 813 | |
| 814 | for (i = language_unknown; i < nr_languages; ++i) |
| 815 | { |
| 816 | enum language l = (enum language) i; |
| 817 | const struct language_defn *lang = language_def (l); |
| 818 | |
| 819 | if (language_sniff_from_mangled_name (lang, mangled, &demangled)) |
| 820 | { |
| 821 | gsymbol->m_language = l; |
| 822 | return demangled; |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | return NULL; |
| 827 | } |
| 828 | |
| 829 | /* Set both the mangled and demangled (if any) names for GSYMBOL based |
| 830 | on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the |
| 831 | objfile's obstack; but if COPY_NAME is 0 and if NAME is |
| 832 | NUL-terminated, then this function assumes that NAME is already |
| 833 | correctly saved (either permanently or with a lifetime tied to the |
| 834 | objfile), and it will not be copied. |
| 835 | |
| 836 | The hash table corresponding to OBJFILE is used, and the memory |
| 837 | comes from the per-BFD storage_obstack. LINKAGE_NAME is copied, |
| 838 | so the pointer can be discarded after calling this function. */ |
| 839 | |
| 840 | void |
| 841 | general_symbol_info::compute_and_set_names (gdb::string_view linkage_name, |
| 842 | bool copy_name, |
| 843 | objfile_per_bfd_storage *per_bfd, |
| 844 | gdb::optional<hashval_t> hash) |
| 845 | { |
| 846 | struct demangled_name_entry **slot; |
| 847 | |
| 848 | if (language () == language_ada) |
| 849 | { |
| 850 | /* In Ada, we do the symbol lookups using the mangled name, so |
| 851 | we can save some space by not storing the demangled name. */ |
| 852 | if (!copy_name) |
| 853 | m_name = linkage_name.data (); |
| 854 | else |
| 855 | m_name = obstack_strndup (&per_bfd->storage_obstack, |
| 856 | linkage_name.data (), |
| 857 | linkage_name.length ()); |
| 858 | set_demangled_name (NULL, &per_bfd->storage_obstack); |
| 859 | |
| 860 | return; |
| 861 | } |
| 862 | |
| 863 | if (per_bfd->demangled_names_hash == NULL) |
| 864 | create_demangled_names_hash (per_bfd); |
| 865 | |
| 866 | struct demangled_name_entry entry (linkage_name); |
| 867 | if (!hash.has_value ()) |
| 868 | hash = hash_demangled_name_entry (&entry); |
| 869 | slot = ((struct demangled_name_entry **) |
| 870 | htab_find_slot_with_hash (per_bfd->demangled_names_hash.get (), |
| 871 | &entry, *hash, INSERT)); |
| 872 | |
| 873 | /* The const_cast is safe because the only reason it is already |
| 874 | initialized is if we purposefully set it from a background |
| 875 | thread to avoid doing the work here. However, it is still |
| 876 | allocated from the heap and needs to be freed by us, just |
| 877 | like if we called symbol_find_demangled_name here. If this is |
| 878 | nullptr, we call symbol_find_demangled_name below, but we put |
| 879 | this smart pointer here to be sure that we don't leak this name. */ |
| 880 | gdb::unique_xmalloc_ptr<char> demangled_name |
| 881 | (const_cast<char *> (language_specific.demangled_name)); |
| 882 | |
| 883 | /* If this name is not in the hash table, add it. */ |
| 884 | if (*slot == NULL |
| 885 | /* A C version of the symbol may have already snuck into the table. |
| 886 | This happens to, e.g., main.init (__go_init_main). Cope. */ |
| 887 | || (language () == language_go && (*slot)->demangled == nullptr)) |
| 888 | { |
| 889 | /* A 0-terminated copy of the linkage name. Callers must set COPY_NAME |
| 890 | to true if the string might not be nullterminated. We have to make |
| 891 | this copy because demangling needs a nullterminated string. */ |
| 892 | gdb::string_view linkage_name_copy; |
| 893 | if (copy_name) |
| 894 | { |
| 895 | char *alloc_name = (char *) alloca (linkage_name.length () + 1); |
| 896 | memcpy (alloc_name, linkage_name.data (), linkage_name.length ()); |
| 897 | alloc_name[linkage_name.length ()] = '\0'; |
| 898 | |
| 899 | linkage_name_copy = gdb::string_view (alloc_name, |
| 900 | linkage_name.length ()); |
| 901 | } |
| 902 | else |
| 903 | linkage_name_copy = linkage_name; |
| 904 | |
| 905 | if (demangled_name.get () == nullptr) |
| 906 | demangled_name.reset |
| 907 | (symbol_find_demangled_name (this, linkage_name_copy.data ())); |
| 908 | |
| 909 | /* Suppose we have demangled_name==NULL, copy_name==0, and |
| 910 | linkage_name_copy==linkage_name. In this case, we already have the |
| 911 | mangled name saved, and we don't have a demangled name. So, |
| 912 | you might think we could save a little space by not recording |
| 913 | this in the hash table at all. |
| 914 | |
| 915 | It turns out that it is actually important to still save such |
| 916 | an entry in the hash table, because storing this name gives |
| 917 | us better bcache hit rates for partial symbols. */ |
| 918 | if (!copy_name) |
| 919 | { |
| 920 | *slot |
| 921 | = ((struct demangled_name_entry *) |
| 922 | obstack_alloc (&per_bfd->storage_obstack, |
| 923 | sizeof (demangled_name_entry))); |
| 924 | new (*slot) demangled_name_entry (linkage_name); |
| 925 | } |
| 926 | else |
| 927 | { |
| 928 | /* If we must copy the mangled name, put it directly after |
| 929 | the struct so we can have a single allocation. */ |
| 930 | *slot |
| 931 | = ((struct demangled_name_entry *) |
| 932 | obstack_alloc (&per_bfd->storage_obstack, |
| 933 | sizeof (demangled_name_entry) |
| 934 | + linkage_name.length () + 1)); |
| 935 | char *mangled_ptr = reinterpret_cast<char *> (*slot + 1); |
| 936 | memcpy (mangled_ptr, linkage_name.data (), linkage_name.length ()); |
| 937 | mangled_ptr [linkage_name.length ()] = '\0'; |
| 938 | new (*slot) demangled_name_entry |
| 939 | (gdb::string_view (mangled_ptr, linkage_name.length ())); |
| 940 | } |
| 941 | (*slot)->demangled = std::move (demangled_name); |
| 942 | (*slot)->language = language (); |
| 943 | } |
| 944 | else if (language () == language_unknown || language () == language_auto) |
| 945 | m_language = (*slot)->language; |
| 946 | |
| 947 | m_name = (*slot)->mangled.data (); |
| 948 | set_demangled_name ((*slot)->demangled.get (), &per_bfd->storage_obstack); |
| 949 | } |
| 950 | |
| 951 | /* See symtab.h. */ |
| 952 | |
| 953 | const char * |
| 954 | general_symbol_info::natural_name () const |
| 955 | { |
| 956 | switch (language ()) |
| 957 | { |
| 958 | case language_cplus: |
| 959 | case language_d: |
| 960 | case language_go: |
| 961 | case language_objc: |
| 962 | case language_fortran: |
| 963 | case language_rust: |
| 964 | if (language_specific.demangled_name != nullptr) |
| 965 | return language_specific.demangled_name; |
| 966 | break; |
| 967 | case language_ada: |
| 968 | return ada_decode_symbol (this); |
| 969 | default: |
| 970 | break; |
| 971 | } |
| 972 | return linkage_name (); |
| 973 | } |
| 974 | |
| 975 | /* See symtab.h. */ |
| 976 | |
| 977 | const char * |
| 978 | general_symbol_info::demangled_name () const |
| 979 | { |
| 980 | const char *dem_name = NULL; |
| 981 | |
| 982 | switch (language ()) |
| 983 | { |
| 984 | case language_cplus: |
| 985 | case language_d: |
| 986 | case language_go: |
| 987 | case language_objc: |
| 988 | case language_fortran: |
| 989 | case language_rust: |
| 990 | dem_name = language_specific.demangled_name; |
| 991 | break; |
| 992 | case language_ada: |
| 993 | dem_name = ada_decode_symbol (this); |
| 994 | break; |
| 995 | default: |
| 996 | break; |
| 997 | } |
| 998 | return dem_name; |
| 999 | } |
| 1000 | |
| 1001 | /* See symtab.h. */ |
| 1002 | |
| 1003 | const char * |
| 1004 | general_symbol_info::search_name () const |
| 1005 | { |
| 1006 | if (language () == language_ada) |
| 1007 | return linkage_name (); |
| 1008 | else |
| 1009 | return natural_name (); |
| 1010 | } |
| 1011 | |
| 1012 | /* See symtab.h. */ |
| 1013 | |
| 1014 | bool |
| 1015 | symbol_matches_search_name (const struct general_symbol_info *gsymbol, |
| 1016 | const lookup_name_info &name) |
| 1017 | { |
| 1018 | symbol_name_matcher_ftype *name_match |
| 1019 | = get_symbol_name_matcher (language_def (gsymbol->language ()), name); |
| 1020 | return name_match (gsymbol->search_name (), name, NULL); |
| 1021 | } |
| 1022 | |
| 1023 | \f |
| 1024 | |
| 1025 | /* Return true if the two sections are the same, or if they could |
| 1026 | plausibly be copies of each other, one in an original object |
| 1027 | file and another in a separated debug file. */ |
| 1028 | |
| 1029 | bool |
| 1030 | matching_obj_sections (struct obj_section *obj_first, |
| 1031 | struct obj_section *obj_second) |
| 1032 | { |
| 1033 | asection *first = obj_first? obj_first->the_bfd_section : NULL; |
| 1034 | asection *second = obj_second? obj_second->the_bfd_section : NULL; |
| 1035 | |
| 1036 | /* If they're the same section, then they match. */ |
| 1037 | if (first == second) |
| 1038 | return true; |
| 1039 | |
| 1040 | /* If either is NULL, give up. */ |
| 1041 | if (first == NULL || second == NULL) |
| 1042 | return false; |
| 1043 | |
| 1044 | /* This doesn't apply to absolute symbols. */ |
| 1045 | if (first->owner == NULL || second->owner == NULL) |
| 1046 | return false; |
| 1047 | |
| 1048 | /* If they're in the same object file, they must be different sections. */ |
| 1049 | if (first->owner == second->owner) |
| 1050 | return false; |
| 1051 | |
| 1052 | /* Check whether the two sections are potentially corresponding. They must |
| 1053 | have the same size, address, and name. We can't compare section indexes, |
| 1054 | which would be more reliable, because some sections may have been |
| 1055 | stripped. */ |
| 1056 | if (bfd_section_size (first) != bfd_section_size (second)) |
| 1057 | return false; |
| 1058 | |
| 1059 | /* In-memory addresses may start at a different offset, relativize them. */ |
| 1060 | if (bfd_section_vma (first) - bfd_get_start_address (first->owner) |
| 1061 | != bfd_section_vma (second) - bfd_get_start_address (second->owner)) |
| 1062 | return false; |
| 1063 | |
| 1064 | if (bfd_section_name (first) == NULL |
| 1065 | || bfd_section_name (second) == NULL |
| 1066 | || strcmp (bfd_section_name (first), bfd_section_name (second)) != 0) |
| 1067 | return false; |
| 1068 | |
| 1069 | /* Otherwise check that they are in corresponding objfiles. */ |
| 1070 | |
| 1071 | struct objfile *obj = NULL; |
| 1072 | for (objfile *objfile : current_program_space->objfiles ()) |
| 1073 | if (objfile->obfd == first->owner) |
| 1074 | { |
| 1075 | obj = objfile; |
| 1076 | break; |
| 1077 | } |
| 1078 | gdb_assert (obj != NULL); |
| 1079 | |
| 1080 | if (obj->separate_debug_objfile != NULL |
| 1081 | && obj->separate_debug_objfile->obfd == second->owner) |
| 1082 | return true; |
| 1083 | if (obj->separate_debug_objfile_backlink != NULL |
| 1084 | && obj->separate_debug_objfile_backlink->obfd == second->owner) |
| 1085 | return true; |
| 1086 | |
| 1087 | return false; |
| 1088 | } |
| 1089 | |
| 1090 | /* See symtab.h. */ |
| 1091 | |
| 1092 | void |
| 1093 | expand_symtab_containing_pc (CORE_ADDR pc, struct obj_section *section) |
| 1094 | { |
| 1095 | struct bound_minimal_symbol msymbol; |
| 1096 | |
| 1097 | /* If we know that this is not a text address, return failure. This is |
| 1098 | necessary because we loop based on texthigh and textlow, which do |
| 1099 | not include the data ranges. */ |
| 1100 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 1101 | if (msymbol.minsym && msymbol.minsym->data_p ()) |
| 1102 | return; |
| 1103 | |
| 1104 | for (objfile *objfile : current_program_space->objfiles ()) |
| 1105 | { |
| 1106 | struct compunit_symtab *cust = NULL; |
| 1107 | |
| 1108 | if (objfile->sf) |
| 1109 | cust = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol, |
| 1110 | pc, section, 0); |
| 1111 | if (cust) |
| 1112 | return; |
| 1113 | } |
| 1114 | } |
| 1115 | \f |
| 1116 | /* Hash function for the symbol cache. */ |
| 1117 | |
| 1118 | static unsigned int |
| 1119 | hash_symbol_entry (const struct objfile *objfile_context, |
| 1120 | const char *name, domain_enum domain) |
| 1121 | { |
| 1122 | unsigned int hash = (uintptr_t) objfile_context; |
| 1123 | |
| 1124 | if (name != NULL) |
| 1125 | hash += htab_hash_string (name); |
| 1126 | |
| 1127 | /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN |
| 1128 | to map to the same slot. */ |
| 1129 | if (domain == STRUCT_DOMAIN) |
| 1130 | hash += VAR_DOMAIN * 7; |
| 1131 | else |
| 1132 | hash += domain * 7; |
| 1133 | |
| 1134 | return hash; |
| 1135 | } |
| 1136 | |
| 1137 | /* Equality function for the symbol cache. */ |
| 1138 | |
| 1139 | static int |
| 1140 | eq_symbol_entry (const struct symbol_cache_slot *slot, |
| 1141 | const struct objfile *objfile_context, |
| 1142 | const char *name, domain_enum domain) |
| 1143 | { |
| 1144 | const char *slot_name; |
| 1145 | domain_enum slot_domain; |
| 1146 | |
| 1147 | if (slot->state == SYMBOL_SLOT_UNUSED) |
| 1148 | return 0; |
| 1149 | |
| 1150 | if (slot->objfile_context != objfile_context) |
| 1151 | return 0; |
| 1152 | |
| 1153 | if (slot->state == SYMBOL_SLOT_NOT_FOUND) |
| 1154 | { |
| 1155 | slot_name = slot->value.not_found.name; |
| 1156 | slot_domain = slot->value.not_found.domain; |
| 1157 | } |
| 1158 | else |
| 1159 | { |
| 1160 | slot_name = slot->value.found.symbol->search_name (); |
| 1161 | slot_domain = SYMBOL_DOMAIN (slot->value.found.symbol); |
| 1162 | } |
| 1163 | |
| 1164 | /* NULL names match. */ |
| 1165 | if (slot_name == NULL && name == NULL) |
| 1166 | { |
| 1167 | /* But there's no point in calling symbol_matches_domain in the |
| 1168 | SYMBOL_SLOT_FOUND case. */ |
| 1169 | if (slot_domain != domain) |
| 1170 | return 0; |
| 1171 | } |
| 1172 | else if (slot_name != NULL && name != NULL) |
| 1173 | { |
| 1174 | /* It's important that we use the same comparison that was done |
| 1175 | the first time through. If the slot records a found symbol, |
| 1176 | then this means using the symbol name comparison function of |
| 1177 | the symbol's language with symbol->search_name (). See |
| 1178 | dictionary.c. It also means using symbol_matches_domain for |
| 1179 | found symbols. See block.c. |
| 1180 | |
| 1181 | If the slot records a not-found symbol, then require a precise match. |
| 1182 | We could still be lax with whitespace like strcmp_iw though. */ |
| 1183 | |
| 1184 | if (slot->state == SYMBOL_SLOT_NOT_FOUND) |
| 1185 | { |
| 1186 | if (strcmp (slot_name, name) != 0) |
| 1187 | return 0; |
| 1188 | if (slot_domain != domain) |
| 1189 | return 0; |
| 1190 | } |
| 1191 | else |
| 1192 | { |
| 1193 | struct symbol *sym = slot->value.found.symbol; |
| 1194 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
| 1195 | |
| 1196 | if (!SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
| 1197 | return 0; |
| 1198 | |
| 1199 | if (!symbol_matches_domain (sym->language (), slot_domain, domain)) |
| 1200 | return 0; |
| 1201 | } |
| 1202 | } |
| 1203 | else |
| 1204 | { |
| 1205 | /* Only one name is NULL. */ |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | return 1; |
| 1210 | } |
| 1211 | |
| 1212 | /* Given a cache of size SIZE, return the size of the struct (with variable |
| 1213 | length array) in bytes. */ |
| 1214 | |
| 1215 | static size_t |
| 1216 | symbol_cache_byte_size (unsigned int size) |
| 1217 | { |
| 1218 | return (sizeof (struct block_symbol_cache) |
| 1219 | + ((size - 1) * sizeof (struct symbol_cache_slot))); |
| 1220 | } |
| 1221 | |
| 1222 | /* Resize CACHE. */ |
| 1223 | |
| 1224 | static void |
| 1225 | resize_symbol_cache (struct symbol_cache *cache, unsigned int new_size) |
| 1226 | { |
| 1227 | /* If there's no change in size, don't do anything. |
| 1228 | All caches have the same size, so we can just compare with the size |
| 1229 | of the global symbols cache. */ |
| 1230 | if ((cache->global_symbols != NULL |
| 1231 | && cache->global_symbols->size == new_size) |
| 1232 | || (cache->global_symbols == NULL |
| 1233 | && new_size == 0)) |
| 1234 | return; |
| 1235 | |
| 1236 | destroy_block_symbol_cache (cache->global_symbols); |
| 1237 | destroy_block_symbol_cache (cache->static_symbols); |
| 1238 | |
| 1239 | if (new_size == 0) |
| 1240 | { |
| 1241 | cache->global_symbols = NULL; |
| 1242 | cache->static_symbols = NULL; |
| 1243 | } |
| 1244 | else |
| 1245 | { |
| 1246 | size_t total_size = symbol_cache_byte_size (new_size); |
| 1247 | |
| 1248 | cache->global_symbols |
| 1249 | = (struct block_symbol_cache *) xcalloc (1, total_size); |
| 1250 | cache->static_symbols |
| 1251 | = (struct block_symbol_cache *) xcalloc (1, total_size); |
| 1252 | cache->global_symbols->size = new_size; |
| 1253 | cache->static_symbols->size = new_size; |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | /* Return the symbol cache of PSPACE. |
| 1258 | Create one if it doesn't exist yet. */ |
| 1259 | |
| 1260 | static struct symbol_cache * |
| 1261 | get_symbol_cache (struct program_space *pspace) |
| 1262 | { |
| 1263 | struct symbol_cache *cache = symbol_cache_key.get (pspace); |
| 1264 | |
| 1265 | if (cache == NULL) |
| 1266 | { |
| 1267 | cache = symbol_cache_key.emplace (pspace); |
| 1268 | resize_symbol_cache (cache, symbol_cache_size); |
| 1269 | } |
| 1270 | |
| 1271 | return cache; |
| 1272 | } |
| 1273 | |
| 1274 | /* Set the size of the symbol cache in all program spaces. */ |
| 1275 | |
| 1276 | static void |
| 1277 | set_symbol_cache_size (unsigned int new_size) |
| 1278 | { |
| 1279 | struct program_space *pspace; |
| 1280 | |
| 1281 | ALL_PSPACES (pspace) |
| 1282 | { |
| 1283 | struct symbol_cache *cache = symbol_cache_key.get (pspace); |
| 1284 | |
| 1285 | /* The pspace could have been created but not have a cache yet. */ |
| 1286 | if (cache != NULL) |
| 1287 | resize_symbol_cache (cache, new_size); |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | /* Called when symbol-cache-size is set. */ |
| 1292 | |
| 1293 | static void |
| 1294 | set_symbol_cache_size_handler (const char *args, int from_tty, |
| 1295 | struct cmd_list_element *c) |
| 1296 | { |
| 1297 | if (new_symbol_cache_size > MAX_SYMBOL_CACHE_SIZE) |
| 1298 | { |
| 1299 | /* Restore the previous value. |
| 1300 | This is the value the "show" command prints. */ |
| 1301 | new_symbol_cache_size = symbol_cache_size; |
| 1302 | |
| 1303 | error (_("Symbol cache size is too large, max is %u."), |
| 1304 | MAX_SYMBOL_CACHE_SIZE); |
| 1305 | } |
| 1306 | symbol_cache_size = new_symbol_cache_size; |
| 1307 | |
| 1308 | set_symbol_cache_size (symbol_cache_size); |
| 1309 | } |
| 1310 | |
| 1311 | /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE. |
| 1312 | OBJFILE_CONTEXT is the current objfile, which may be NULL. |
| 1313 | The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup |
| 1314 | failed (and thus this one will too), or NULL if the symbol is not present |
| 1315 | in the cache. |
| 1316 | *BSC_PTR and *SLOT_PTR are set to the cache and slot of the symbol, which |
| 1317 | can be used to save the result of a full lookup attempt. */ |
| 1318 | |
| 1319 | static struct block_symbol |
| 1320 | symbol_cache_lookup (struct symbol_cache *cache, |
| 1321 | struct objfile *objfile_context, enum block_enum block, |
| 1322 | const char *name, domain_enum domain, |
| 1323 | struct block_symbol_cache **bsc_ptr, |
| 1324 | struct symbol_cache_slot **slot_ptr) |
| 1325 | { |
| 1326 | struct block_symbol_cache *bsc; |
| 1327 | unsigned int hash; |
| 1328 | struct symbol_cache_slot *slot; |
| 1329 | |
| 1330 | if (block == GLOBAL_BLOCK) |
| 1331 | bsc = cache->global_symbols; |
| 1332 | else |
| 1333 | bsc = cache->static_symbols; |
| 1334 | if (bsc == NULL) |
| 1335 | { |
| 1336 | *bsc_ptr = NULL; |
| 1337 | *slot_ptr = NULL; |
| 1338 | return {}; |
| 1339 | } |
| 1340 | |
| 1341 | hash = hash_symbol_entry (objfile_context, name, domain); |
| 1342 | slot = bsc->symbols + hash % bsc->size; |
| 1343 | |
| 1344 | *bsc_ptr = bsc; |
| 1345 | *slot_ptr = slot; |
| 1346 | |
| 1347 | if (eq_symbol_entry (slot, objfile_context, name, domain)) |
| 1348 | { |
| 1349 | if (symbol_lookup_debug) |
| 1350 | fprintf_unfiltered (gdb_stdlog, |
| 1351 | "%s block symbol cache hit%s for %s, %s\n", |
| 1352 | block == GLOBAL_BLOCK ? "Global" : "Static", |
| 1353 | slot->state == SYMBOL_SLOT_NOT_FOUND |
| 1354 | ? " (not found)" : "", |
| 1355 | name, domain_name (domain)); |
| 1356 | ++bsc->hits; |
| 1357 | if (slot->state == SYMBOL_SLOT_NOT_FOUND) |
| 1358 | return SYMBOL_LOOKUP_FAILED; |
| 1359 | return slot->value.found; |
| 1360 | } |
| 1361 | |
| 1362 | /* Symbol is not present in the cache. */ |
| 1363 | |
| 1364 | if (symbol_lookup_debug) |
| 1365 | { |
| 1366 | fprintf_unfiltered (gdb_stdlog, |
| 1367 | "%s block symbol cache miss for %s, %s\n", |
| 1368 | block == GLOBAL_BLOCK ? "Global" : "Static", |
| 1369 | name, domain_name (domain)); |
| 1370 | } |
| 1371 | ++bsc->misses; |
| 1372 | return {}; |
| 1373 | } |
| 1374 | |
| 1375 | /* Mark SYMBOL as found in SLOT. |
| 1376 | OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL |
| 1377 | if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not* |
| 1378 | necessarily the objfile the symbol was found in. */ |
| 1379 | |
| 1380 | static void |
| 1381 | symbol_cache_mark_found (struct block_symbol_cache *bsc, |
| 1382 | struct symbol_cache_slot *slot, |
| 1383 | struct objfile *objfile_context, |
| 1384 | struct symbol *symbol, |
| 1385 | const struct block *block) |
| 1386 | { |
| 1387 | if (bsc == NULL) |
| 1388 | return; |
| 1389 | if (slot->state != SYMBOL_SLOT_UNUSED) |
| 1390 | { |
| 1391 | ++bsc->collisions; |
| 1392 | symbol_cache_clear_slot (slot); |
| 1393 | } |
| 1394 | slot->state = SYMBOL_SLOT_FOUND; |
| 1395 | slot->objfile_context = objfile_context; |
| 1396 | slot->value.found.symbol = symbol; |
| 1397 | slot->value.found.block = block; |
| 1398 | } |
| 1399 | |
| 1400 | /* Mark symbol NAME, DOMAIN as not found in SLOT. |
| 1401 | OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL |
| 1402 | if it's not needed to distinguish lookups (STATIC_BLOCK). */ |
| 1403 | |
| 1404 | static void |
| 1405 | symbol_cache_mark_not_found (struct block_symbol_cache *bsc, |
| 1406 | struct symbol_cache_slot *slot, |
| 1407 | struct objfile *objfile_context, |
| 1408 | const char *name, domain_enum domain) |
| 1409 | { |
| 1410 | if (bsc == NULL) |
| 1411 | return; |
| 1412 | if (slot->state != SYMBOL_SLOT_UNUSED) |
| 1413 | { |
| 1414 | ++bsc->collisions; |
| 1415 | symbol_cache_clear_slot (slot); |
| 1416 | } |
| 1417 | slot->state = SYMBOL_SLOT_NOT_FOUND; |
| 1418 | slot->objfile_context = objfile_context; |
| 1419 | slot->value.not_found.name = xstrdup (name); |
| 1420 | slot->value.not_found.domain = domain; |
| 1421 | } |
| 1422 | |
| 1423 | /* Flush the symbol cache of PSPACE. */ |
| 1424 | |
| 1425 | static void |
| 1426 | symbol_cache_flush (struct program_space *pspace) |
| 1427 | { |
| 1428 | struct symbol_cache *cache = symbol_cache_key.get (pspace); |
| 1429 | int pass; |
| 1430 | |
| 1431 | if (cache == NULL) |
| 1432 | return; |
| 1433 | if (cache->global_symbols == NULL) |
| 1434 | { |
| 1435 | gdb_assert (symbol_cache_size == 0); |
| 1436 | gdb_assert (cache->static_symbols == NULL); |
| 1437 | return; |
| 1438 | } |
| 1439 | |
| 1440 | /* If the cache is untouched since the last flush, early exit. |
| 1441 | This is important for performance during the startup of a program linked |
| 1442 | with 100s (or 1000s) of shared libraries. */ |
| 1443 | if (cache->global_symbols->misses == 0 |
| 1444 | && cache->static_symbols->misses == 0) |
| 1445 | return; |
| 1446 | |
| 1447 | gdb_assert (cache->global_symbols->size == symbol_cache_size); |
| 1448 | gdb_assert (cache->static_symbols->size == symbol_cache_size); |
| 1449 | |
| 1450 | for (pass = 0; pass < 2; ++pass) |
| 1451 | { |
| 1452 | struct block_symbol_cache *bsc |
| 1453 | = pass == 0 ? cache->global_symbols : cache->static_symbols; |
| 1454 | unsigned int i; |
| 1455 | |
| 1456 | for (i = 0; i < bsc->size; ++i) |
| 1457 | symbol_cache_clear_slot (&bsc->symbols[i]); |
| 1458 | } |
| 1459 | |
| 1460 | cache->global_symbols->hits = 0; |
| 1461 | cache->global_symbols->misses = 0; |
| 1462 | cache->global_symbols->collisions = 0; |
| 1463 | cache->static_symbols->hits = 0; |
| 1464 | cache->static_symbols->misses = 0; |
| 1465 | cache->static_symbols->collisions = 0; |
| 1466 | } |
| 1467 | |
| 1468 | /* Dump CACHE. */ |
| 1469 | |
| 1470 | static void |
| 1471 | symbol_cache_dump (const struct symbol_cache *cache) |
| 1472 | { |
| 1473 | int pass; |
| 1474 | |
| 1475 | if (cache->global_symbols == NULL) |
| 1476 | { |
| 1477 | printf_filtered (" <disabled>\n"); |
| 1478 | return; |
| 1479 | } |
| 1480 | |
| 1481 | for (pass = 0; pass < 2; ++pass) |
| 1482 | { |
| 1483 | const struct block_symbol_cache *bsc |
| 1484 | = pass == 0 ? cache->global_symbols : cache->static_symbols; |
| 1485 | unsigned int i; |
| 1486 | |
| 1487 | if (pass == 0) |
| 1488 | printf_filtered ("Global symbols:\n"); |
| 1489 | else |
| 1490 | printf_filtered ("Static symbols:\n"); |
| 1491 | |
| 1492 | for (i = 0; i < bsc->size; ++i) |
| 1493 | { |
| 1494 | const struct symbol_cache_slot *slot = &bsc->symbols[i]; |
| 1495 | |
| 1496 | QUIT; |
| 1497 | |
| 1498 | switch (slot->state) |
| 1499 | { |
| 1500 | case SYMBOL_SLOT_UNUSED: |
| 1501 | break; |
| 1502 | case SYMBOL_SLOT_NOT_FOUND: |
| 1503 | printf_filtered (" [%4u] = %s, %s %s (not found)\n", i, |
| 1504 | host_address_to_string (slot->objfile_context), |
| 1505 | slot->value.not_found.name, |
| 1506 | domain_name (slot->value.not_found.domain)); |
| 1507 | break; |
| 1508 | case SYMBOL_SLOT_FOUND: |
| 1509 | { |
| 1510 | struct symbol *found = slot->value.found.symbol; |
| 1511 | const struct objfile *context = slot->objfile_context; |
| 1512 | |
| 1513 | printf_filtered (" [%4u] = %s, %s %s\n", i, |
| 1514 | host_address_to_string (context), |
| 1515 | found->print_name (), |
| 1516 | domain_name (SYMBOL_DOMAIN (found))); |
| 1517 | break; |
| 1518 | } |
| 1519 | } |
| 1520 | } |
| 1521 | } |
| 1522 | } |
| 1523 | |
| 1524 | /* The "mt print symbol-cache" command. */ |
| 1525 | |
| 1526 | static void |
| 1527 | maintenance_print_symbol_cache (const char *args, int from_tty) |
| 1528 | { |
| 1529 | struct program_space *pspace; |
| 1530 | |
| 1531 | ALL_PSPACES (pspace) |
| 1532 | { |
| 1533 | struct symbol_cache *cache; |
| 1534 | |
| 1535 | printf_filtered (_("Symbol cache for pspace %d\n%s:\n"), |
| 1536 | pspace->num, |
| 1537 | pspace->symfile_object_file != NULL |
| 1538 | ? objfile_name (pspace->symfile_object_file) |
| 1539 | : "(no object file)"); |
| 1540 | |
| 1541 | /* If the cache hasn't been created yet, avoid creating one. */ |
| 1542 | cache = symbol_cache_key.get (pspace); |
| 1543 | if (cache == NULL) |
| 1544 | printf_filtered (" <empty>\n"); |
| 1545 | else |
| 1546 | symbol_cache_dump (cache); |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | /* The "mt flush-symbol-cache" command. */ |
| 1551 | |
| 1552 | static void |
| 1553 | maintenance_flush_symbol_cache (const char *args, int from_tty) |
| 1554 | { |
| 1555 | struct program_space *pspace; |
| 1556 | |
| 1557 | ALL_PSPACES (pspace) |
| 1558 | { |
| 1559 | symbol_cache_flush (pspace); |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | /* Print usage statistics of CACHE. */ |
| 1564 | |
| 1565 | static void |
| 1566 | symbol_cache_stats (struct symbol_cache *cache) |
| 1567 | { |
| 1568 | int pass; |
| 1569 | |
| 1570 | if (cache->global_symbols == NULL) |
| 1571 | { |
| 1572 | printf_filtered (" <disabled>\n"); |
| 1573 | return; |
| 1574 | } |
| 1575 | |
| 1576 | for (pass = 0; pass < 2; ++pass) |
| 1577 | { |
| 1578 | const struct block_symbol_cache *bsc |
| 1579 | = pass == 0 ? cache->global_symbols : cache->static_symbols; |
| 1580 | |
| 1581 | QUIT; |
| 1582 | |
| 1583 | if (pass == 0) |
| 1584 | printf_filtered ("Global block cache stats:\n"); |
| 1585 | else |
| 1586 | printf_filtered ("Static block cache stats:\n"); |
| 1587 | |
| 1588 | printf_filtered (" size: %u\n", bsc->size); |
| 1589 | printf_filtered (" hits: %u\n", bsc->hits); |
| 1590 | printf_filtered (" misses: %u\n", bsc->misses); |
| 1591 | printf_filtered (" collisions: %u\n", bsc->collisions); |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | /* The "mt print symbol-cache-statistics" command. */ |
| 1596 | |
| 1597 | static void |
| 1598 | maintenance_print_symbol_cache_statistics (const char *args, int from_tty) |
| 1599 | { |
| 1600 | struct program_space *pspace; |
| 1601 | |
| 1602 | ALL_PSPACES (pspace) |
| 1603 | { |
| 1604 | struct symbol_cache *cache; |
| 1605 | |
| 1606 | printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"), |
| 1607 | pspace->num, |
| 1608 | pspace->symfile_object_file != NULL |
| 1609 | ? objfile_name (pspace->symfile_object_file) |
| 1610 | : "(no object file)"); |
| 1611 | |
| 1612 | /* If the cache hasn't been created yet, avoid creating one. */ |
| 1613 | cache = symbol_cache_key.get (pspace); |
| 1614 | if (cache == NULL) |
| 1615 | printf_filtered (" empty, no stats available\n"); |
| 1616 | else |
| 1617 | symbol_cache_stats (cache); |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | /* This module's 'new_objfile' observer. */ |
| 1622 | |
| 1623 | static void |
| 1624 | symtab_new_objfile_observer (struct objfile *objfile) |
| 1625 | { |
| 1626 | /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */ |
| 1627 | symbol_cache_flush (current_program_space); |
| 1628 | } |
| 1629 | |
| 1630 | /* This module's 'free_objfile' observer. */ |
| 1631 | |
| 1632 | static void |
| 1633 | symtab_free_objfile_observer (struct objfile *objfile) |
| 1634 | { |
| 1635 | symbol_cache_flush (objfile->pspace); |
| 1636 | } |
| 1637 | \f |
| 1638 | /* Debug symbols usually don't have section information. We need to dig that |
| 1639 | out of the minimal symbols and stash that in the debug symbol. */ |
| 1640 | |
| 1641 | void |
| 1642 | fixup_section (struct general_symbol_info *ginfo, |
| 1643 | CORE_ADDR addr, struct objfile *objfile) |
| 1644 | { |
| 1645 | struct minimal_symbol *msym; |
| 1646 | |
| 1647 | /* First, check whether a minimal symbol with the same name exists |
| 1648 | and points to the same address. The address check is required |
| 1649 | e.g. on PowerPC64, where the minimal symbol for a function will |
| 1650 | point to the function descriptor, while the debug symbol will |
| 1651 | point to the actual function code. */ |
| 1652 | msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->linkage_name (), |
| 1653 | objfile); |
| 1654 | if (msym) |
| 1655 | ginfo->section = MSYMBOL_SECTION (msym); |
| 1656 | else |
| 1657 | { |
| 1658 | /* Static, function-local variables do appear in the linker |
| 1659 | (minimal) symbols, but are frequently given names that won't |
| 1660 | be found via lookup_minimal_symbol(). E.g., it has been |
| 1661 | observed in frv-uclinux (ELF) executables that a static, |
| 1662 | function-local variable named "foo" might appear in the |
| 1663 | linker symbols as "foo.6" or "foo.3". Thus, there is no |
| 1664 | point in attempting to extend the lookup-by-name mechanism to |
| 1665 | handle this case due to the fact that there can be multiple |
| 1666 | names. |
| 1667 | |
| 1668 | So, instead, search the section table when lookup by name has |
| 1669 | failed. The ``addr'' and ``endaddr'' fields may have already |
| 1670 | been relocated. If so, the relocation offset needs to be |
| 1671 | subtracted from these values when performing the comparison. |
| 1672 | We unconditionally subtract it, because, when no relocation |
| 1673 | has been performed, the value will simply be zero. |
| 1674 | |
| 1675 | The address of the symbol whose section we're fixing up HAS |
| 1676 | NOT BEEN adjusted (relocated) yet. It can't have been since |
| 1677 | the section isn't yet known and knowing the section is |
| 1678 | necessary in order to add the correct relocation value. In |
| 1679 | other words, we wouldn't even be in this function (attempting |
| 1680 | to compute the section) if it were already known. |
| 1681 | |
| 1682 | Note that it is possible to search the minimal symbols |
| 1683 | (subtracting the relocation value if necessary) to find the |
| 1684 | matching minimal symbol, but this is overkill and much less |
| 1685 | efficient. It is not necessary to find the matching minimal |
| 1686 | symbol, only its section. |
| 1687 | |
| 1688 | Note that this technique (of doing a section table search) |
| 1689 | can fail when unrelocated section addresses overlap. For |
| 1690 | this reason, we still attempt a lookup by name prior to doing |
| 1691 | a search of the section table. */ |
| 1692 | |
| 1693 | struct obj_section *s; |
| 1694 | int fallback = -1; |
| 1695 | |
| 1696 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 1697 | { |
| 1698 | int idx = s - objfile->sections; |
| 1699 | CORE_ADDR offset = objfile->section_offsets[idx]; |
| 1700 | |
| 1701 | if (fallback == -1) |
| 1702 | fallback = idx; |
| 1703 | |
| 1704 | if (obj_section_addr (s) - offset <= addr |
| 1705 | && addr < obj_section_endaddr (s) - offset) |
| 1706 | { |
| 1707 | ginfo->section = idx; |
| 1708 | return; |
| 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | /* If we didn't find the section, assume it is in the first |
| 1713 | section. If there is no allocated section, then it hardly |
| 1714 | matters what we pick, so just pick zero. */ |
| 1715 | if (fallback == -1) |
| 1716 | ginfo->section = 0; |
| 1717 | else |
| 1718 | ginfo->section = fallback; |
| 1719 | } |
| 1720 | } |
| 1721 | |
| 1722 | struct symbol * |
| 1723 | fixup_symbol_section (struct symbol *sym, struct objfile *objfile) |
| 1724 | { |
| 1725 | CORE_ADDR addr; |
| 1726 | |
| 1727 | if (!sym) |
| 1728 | return NULL; |
| 1729 | |
| 1730 | if (!SYMBOL_OBJFILE_OWNED (sym)) |
| 1731 | return sym; |
| 1732 | |
| 1733 | /* We either have an OBJFILE, or we can get at it from the sym's |
| 1734 | symtab. Anything else is a bug. */ |
| 1735 | gdb_assert (objfile || symbol_symtab (sym)); |
| 1736 | |
| 1737 | if (objfile == NULL) |
| 1738 | objfile = symbol_objfile (sym); |
| 1739 | |
| 1740 | if (SYMBOL_OBJ_SECTION (objfile, sym)) |
| 1741 | return sym; |
| 1742 | |
| 1743 | /* We should have an objfile by now. */ |
| 1744 | gdb_assert (objfile); |
| 1745 | |
| 1746 | switch (SYMBOL_CLASS (sym)) |
| 1747 | { |
| 1748 | case LOC_STATIC: |
| 1749 | case LOC_LABEL: |
| 1750 | addr = SYMBOL_VALUE_ADDRESS (sym); |
| 1751 | break; |
| 1752 | case LOC_BLOCK: |
| 1753 | addr = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)); |
| 1754 | break; |
| 1755 | |
| 1756 | default: |
| 1757 | /* Nothing else will be listed in the minsyms -- no use looking |
| 1758 | it up. */ |
| 1759 | return sym; |
| 1760 | } |
| 1761 | |
| 1762 | fixup_section (sym, addr, objfile); |
| 1763 | |
| 1764 | return sym; |
| 1765 | } |
| 1766 | |
| 1767 | /* See symtab.h. */ |
| 1768 | |
| 1769 | demangle_for_lookup_info::demangle_for_lookup_info |
| 1770 | (const lookup_name_info &lookup_name, language lang) |
| 1771 | { |
| 1772 | demangle_result_storage storage; |
| 1773 | |
| 1774 | if (lookup_name.ignore_parameters () && lang == language_cplus) |
| 1775 | { |
| 1776 | gdb::unique_xmalloc_ptr<char> without_params |
| 1777 | = cp_remove_params_if_any (lookup_name.c_str (), |
| 1778 | lookup_name.completion_mode ()); |
| 1779 | |
| 1780 | if (without_params != NULL) |
| 1781 | { |
| 1782 | if (lookup_name.match_type () != symbol_name_match_type::SEARCH_NAME) |
| 1783 | m_demangled_name = demangle_for_lookup (without_params.get (), |
| 1784 | lang, storage); |
| 1785 | return; |
| 1786 | } |
| 1787 | } |
| 1788 | |
| 1789 | if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME) |
| 1790 | m_demangled_name = lookup_name.c_str (); |
| 1791 | else |
| 1792 | m_demangled_name = demangle_for_lookup (lookup_name.c_str (), |
| 1793 | lang, storage); |
| 1794 | } |
| 1795 | |
| 1796 | /* See symtab.h. */ |
| 1797 | |
| 1798 | const lookup_name_info & |
| 1799 | lookup_name_info::match_any () |
| 1800 | { |
| 1801 | /* Lookup any symbol that "" would complete. I.e., this matches all |
| 1802 | symbol names. */ |
| 1803 | static const lookup_name_info lookup_name ("", symbol_name_match_type::FULL, |
| 1804 | true); |
| 1805 | |
| 1806 | return lookup_name; |
| 1807 | } |
| 1808 | |
| 1809 | /* Compute the demangled form of NAME as used by the various symbol |
| 1810 | lookup functions. The result can either be the input NAME |
| 1811 | directly, or a pointer to a buffer owned by the STORAGE object. |
| 1812 | |
| 1813 | For Ada, this function just returns NAME, unmodified. |
| 1814 | Normally, Ada symbol lookups are performed using the encoded name |
| 1815 | rather than the demangled name, and so it might seem to make sense |
| 1816 | for this function to return an encoded version of NAME. |
| 1817 | Unfortunately, we cannot do this, because this function is used in |
| 1818 | circumstances where it is not appropriate to try to encode NAME. |
| 1819 | For instance, when displaying the frame info, we demangle the name |
| 1820 | of each parameter, and then perform a symbol lookup inside our |
| 1821 | function using that demangled name. In Ada, certain functions |
| 1822 | have internally-generated parameters whose name contain uppercase |
| 1823 | characters. Encoding those name would result in those uppercase |
| 1824 | characters to become lowercase, and thus cause the symbol lookup |
| 1825 | to fail. */ |
| 1826 | |
| 1827 | const char * |
| 1828 | demangle_for_lookup (const char *name, enum language lang, |
| 1829 | demangle_result_storage &storage) |
| 1830 | { |
| 1831 | /* If we are using C++, D, or Go, demangle the name before doing a |
| 1832 | lookup, so we can always binary search. */ |
| 1833 | if (lang == language_cplus) |
| 1834 | { |
| 1835 | char *demangled_name = gdb_demangle (name, DMGL_ANSI | DMGL_PARAMS); |
| 1836 | if (demangled_name != NULL) |
| 1837 | return storage.set_malloc_ptr (demangled_name); |
| 1838 | |
| 1839 | /* If we were given a non-mangled name, canonicalize it |
| 1840 | according to the language (so far only for C++). */ |
| 1841 | std::string canon = cp_canonicalize_string (name); |
| 1842 | if (!canon.empty ()) |
| 1843 | return storage.swap_string (canon); |
| 1844 | } |
| 1845 | else if (lang == language_d) |
| 1846 | { |
| 1847 | char *demangled_name = d_demangle (name, 0); |
| 1848 | if (demangled_name != NULL) |
| 1849 | return storage.set_malloc_ptr (demangled_name); |
| 1850 | } |
| 1851 | else if (lang == language_go) |
| 1852 | { |
| 1853 | char *demangled_name = go_demangle (name, 0); |
| 1854 | if (demangled_name != NULL) |
| 1855 | return storage.set_malloc_ptr (demangled_name); |
| 1856 | } |
| 1857 | |
| 1858 | return name; |
| 1859 | } |
| 1860 | |
| 1861 | /* See symtab.h. */ |
| 1862 | |
| 1863 | unsigned int |
| 1864 | search_name_hash (enum language language, const char *search_name) |
| 1865 | { |
| 1866 | return language_def (language)->la_search_name_hash (search_name); |
| 1867 | } |
| 1868 | |
| 1869 | /* See symtab.h. |
| 1870 | |
| 1871 | This function (or rather its subordinates) have a bunch of loops and |
| 1872 | it would seem to be attractive to put in some QUIT's (though I'm not really |
| 1873 | sure whether it can run long enough to be really important). But there |
| 1874 | are a few calls for which it would appear to be bad news to quit |
| 1875 | out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note |
| 1876 | that there is C++ code below which can error(), but that probably |
| 1877 | doesn't affect these calls since they are looking for a known |
| 1878 | variable and thus can probably assume it will never hit the C++ |
| 1879 | code). */ |
| 1880 | |
| 1881 | struct block_symbol |
| 1882 | lookup_symbol_in_language (const char *name, const struct block *block, |
| 1883 | const domain_enum domain, enum language lang, |
| 1884 | struct field_of_this_result *is_a_field_of_this) |
| 1885 | { |
| 1886 | demangle_result_storage storage; |
| 1887 | const char *modified_name = demangle_for_lookup (name, lang, storage); |
| 1888 | |
| 1889 | return lookup_symbol_aux (modified_name, |
| 1890 | symbol_name_match_type::FULL, |
| 1891 | block, domain, lang, |
| 1892 | is_a_field_of_this); |
| 1893 | } |
| 1894 | |
| 1895 | /* See symtab.h. */ |
| 1896 | |
| 1897 | struct block_symbol |
| 1898 | lookup_symbol (const char *name, const struct block *block, |
| 1899 | domain_enum domain, |
| 1900 | struct field_of_this_result *is_a_field_of_this) |
| 1901 | { |
| 1902 | return lookup_symbol_in_language (name, block, domain, |
| 1903 | current_language->la_language, |
| 1904 | is_a_field_of_this); |
| 1905 | } |
| 1906 | |
| 1907 | /* See symtab.h. */ |
| 1908 | |
| 1909 | struct block_symbol |
| 1910 | lookup_symbol_search_name (const char *search_name, const struct block *block, |
| 1911 | domain_enum domain) |
| 1912 | { |
| 1913 | return lookup_symbol_aux (search_name, symbol_name_match_type::SEARCH_NAME, |
| 1914 | block, domain, language_asm, NULL); |
| 1915 | } |
| 1916 | |
| 1917 | /* See symtab.h. */ |
| 1918 | |
| 1919 | struct block_symbol |
| 1920 | lookup_language_this (const struct language_defn *lang, |
| 1921 | const struct block *block) |
| 1922 | { |
| 1923 | if (lang->la_name_of_this == NULL || block == NULL) |
| 1924 | return {}; |
| 1925 | |
| 1926 | if (symbol_lookup_debug > 1) |
| 1927 | { |
| 1928 | struct objfile *objfile = lookup_objfile_from_block (block); |
| 1929 | |
| 1930 | fprintf_unfiltered (gdb_stdlog, |
| 1931 | "lookup_language_this (%s, %s (objfile %s))", |
| 1932 | lang->la_name, host_address_to_string (block), |
| 1933 | objfile_debug_name (objfile)); |
| 1934 | } |
| 1935 | |
| 1936 | while (block) |
| 1937 | { |
| 1938 | struct symbol *sym; |
| 1939 | |
| 1940 | sym = block_lookup_symbol (block, lang->la_name_of_this, |
| 1941 | symbol_name_match_type::SEARCH_NAME, |
| 1942 | VAR_DOMAIN); |
| 1943 | if (sym != NULL) |
| 1944 | { |
| 1945 | if (symbol_lookup_debug > 1) |
| 1946 | { |
| 1947 | fprintf_unfiltered (gdb_stdlog, " = %s (%s, block %s)\n", |
| 1948 | sym->print_name (), |
| 1949 | host_address_to_string (sym), |
| 1950 | host_address_to_string (block)); |
| 1951 | } |
| 1952 | return (struct block_symbol) {sym, block}; |
| 1953 | } |
| 1954 | if (BLOCK_FUNCTION (block)) |
| 1955 | break; |
| 1956 | block = BLOCK_SUPERBLOCK (block); |
| 1957 | } |
| 1958 | |
| 1959 | if (symbol_lookup_debug > 1) |
| 1960 | fprintf_unfiltered (gdb_stdlog, " = NULL\n"); |
| 1961 | return {}; |
| 1962 | } |
| 1963 | |
| 1964 | /* Given TYPE, a structure/union, |
| 1965 | return 1 if the component named NAME from the ultimate target |
| 1966 | structure/union is defined, otherwise, return 0. */ |
| 1967 | |
| 1968 | static int |
| 1969 | check_field (struct type *type, const char *name, |
| 1970 | struct field_of_this_result *is_a_field_of_this) |
| 1971 | { |
| 1972 | int i; |
| 1973 | |
| 1974 | /* The type may be a stub. */ |
| 1975 | type = check_typedef (type); |
| 1976 | |
| 1977 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) |
| 1978 | { |
| 1979 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
| 1980 | |
| 1981 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
| 1982 | { |
| 1983 | is_a_field_of_this->type = type; |
| 1984 | is_a_field_of_this->field = &TYPE_FIELD (type, i); |
| 1985 | return 1; |
| 1986 | } |
| 1987 | } |
| 1988 | |
| 1989 | /* C++: If it was not found as a data field, then try to return it |
| 1990 | as a pointer to a method. */ |
| 1991 | |
| 1992 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) |
| 1993 | { |
| 1994 | if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0) |
| 1995 | { |
| 1996 | is_a_field_of_this->type = type; |
| 1997 | is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i); |
| 1998 | return 1; |
| 1999 | } |
| 2000 | } |
| 2001 | |
| 2002 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
| 2003 | if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this)) |
| 2004 | return 1; |
| 2005 | |
| 2006 | return 0; |
| 2007 | } |
| 2008 | |
| 2009 | /* Behave like lookup_symbol except that NAME is the natural name |
| 2010 | (e.g., demangled name) of the symbol that we're looking for. */ |
| 2011 | |
| 2012 | static struct block_symbol |
| 2013 | lookup_symbol_aux (const char *name, symbol_name_match_type match_type, |
| 2014 | const struct block *block, |
| 2015 | const domain_enum domain, enum language language, |
| 2016 | struct field_of_this_result *is_a_field_of_this) |
| 2017 | { |
| 2018 | struct block_symbol result; |
| 2019 | const struct language_defn *langdef; |
| 2020 | |
| 2021 | if (symbol_lookup_debug) |
| 2022 | { |
| 2023 | struct objfile *objfile = lookup_objfile_from_block (block); |
| 2024 | |
| 2025 | fprintf_unfiltered (gdb_stdlog, |
| 2026 | "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n", |
| 2027 | name, host_address_to_string (block), |
| 2028 | objfile != NULL |
| 2029 | ? objfile_debug_name (objfile) : "NULL", |
| 2030 | domain_name (domain), language_str (language)); |
| 2031 | } |
| 2032 | |
| 2033 | /* Make sure we do something sensible with is_a_field_of_this, since |
| 2034 | the callers that set this parameter to some non-null value will |
| 2035 | certainly use it later. If we don't set it, the contents of |
| 2036 | is_a_field_of_this are undefined. */ |
| 2037 | if (is_a_field_of_this != NULL) |
| 2038 | memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this)); |
| 2039 | |
| 2040 | /* Search specified block and its superiors. Don't search |
| 2041 | STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 2042 | |
| 2043 | result = lookup_local_symbol (name, match_type, block, domain, language); |
| 2044 | if (result.symbol != NULL) |
| 2045 | { |
| 2046 | if (symbol_lookup_debug) |
| 2047 | { |
| 2048 | fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n", |
| 2049 | host_address_to_string (result.symbol)); |
| 2050 | } |
| 2051 | return result; |
| 2052 | } |
| 2053 | |
| 2054 | /* If requested to do so by the caller and if appropriate for LANGUAGE, |
| 2055 | check to see if NAME is a field of `this'. */ |
| 2056 | |
| 2057 | langdef = language_def (language); |
| 2058 | |
| 2059 | /* Don't do this check if we are searching for a struct. It will |
| 2060 | not be found by check_field, but will be found by other |
| 2061 | means. */ |
| 2062 | if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN) |
| 2063 | { |
| 2064 | result = lookup_language_this (langdef, block); |
| 2065 | |
| 2066 | if (result.symbol) |
| 2067 | { |
| 2068 | struct type *t = result.symbol->type; |
| 2069 | |
| 2070 | /* I'm not really sure that type of this can ever |
| 2071 | be typedefed; just be safe. */ |
| 2072 | t = check_typedef (t); |
| 2073 | if (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
| 2074 | t = TYPE_TARGET_TYPE (t); |
| 2075 | |
| 2076 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
| 2077 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
| 2078 | error (_("Internal error: `%s' is not an aggregate"), |
| 2079 | langdef->la_name_of_this); |
| 2080 | |
| 2081 | if (check_field (t, name, is_a_field_of_this)) |
| 2082 | { |
| 2083 | if (symbol_lookup_debug) |
| 2084 | { |
| 2085 | fprintf_unfiltered (gdb_stdlog, |
| 2086 | "lookup_symbol_aux (...) = NULL\n"); |
| 2087 | } |
| 2088 | return {}; |
| 2089 | } |
| 2090 | } |
| 2091 | } |
| 2092 | |
| 2093 | /* Now do whatever is appropriate for LANGUAGE to look |
| 2094 | up static and global variables. */ |
| 2095 | |
| 2096 | result = langdef->la_lookup_symbol_nonlocal (langdef, name, block, domain); |
| 2097 | if (result.symbol != NULL) |
| 2098 | { |
| 2099 | if (symbol_lookup_debug) |
| 2100 | { |
| 2101 | fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n", |
| 2102 | host_address_to_string (result.symbol)); |
| 2103 | } |
| 2104 | return result; |
| 2105 | } |
| 2106 | |
| 2107 | /* Now search all static file-level symbols. Not strictly correct, |
| 2108 | but more useful than an error. */ |
| 2109 | |
| 2110 | result = lookup_static_symbol (name, domain); |
| 2111 | if (symbol_lookup_debug) |
| 2112 | { |
| 2113 | fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n", |
| 2114 | result.symbol != NULL |
| 2115 | ? host_address_to_string (result.symbol) |
| 2116 | : "NULL"); |
| 2117 | } |
| 2118 | return result; |
| 2119 | } |
| 2120 | |
| 2121 | /* Check to see if the symbol is defined in BLOCK or its superiors. |
| 2122 | Don't search STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 2123 | |
| 2124 | static struct block_symbol |
| 2125 | lookup_local_symbol (const char *name, |
| 2126 | symbol_name_match_type match_type, |
| 2127 | const struct block *block, |
| 2128 | const domain_enum domain, |
| 2129 | enum language language) |
| 2130 | { |
| 2131 | struct symbol *sym; |
| 2132 | const struct block *static_block = block_static_block (block); |
| 2133 | const char *scope = block_scope (block); |
| 2134 | |
| 2135 | /* Check if either no block is specified or it's a global block. */ |
| 2136 | |
| 2137 | if (static_block == NULL) |
| 2138 | return {}; |
| 2139 | |
| 2140 | while (block != static_block) |
| 2141 | { |
| 2142 | sym = lookup_symbol_in_block (name, match_type, block, domain); |
| 2143 | if (sym != NULL) |
| 2144 | return (struct block_symbol) {sym, block}; |
| 2145 | |
| 2146 | if (language == language_cplus || language == language_fortran) |
| 2147 | { |
| 2148 | struct block_symbol blocksym |
| 2149 | = cp_lookup_symbol_imports_or_template (scope, name, block, |
| 2150 | domain); |
| 2151 | |
| 2152 | if (blocksym.symbol != NULL) |
| 2153 | return blocksym; |
| 2154 | } |
| 2155 | |
| 2156 | if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block)) |
| 2157 | break; |
| 2158 | block = BLOCK_SUPERBLOCK (block); |
| 2159 | } |
| 2160 | |
| 2161 | /* We've reached the end of the function without finding a result. */ |
| 2162 | |
| 2163 | return {}; |
| 2164 | } |
| 2165 | |
| 2166 | /* See symtab.h. */ |
| 2167 | |
| 2168 | struct objfile * |
| 2169 | lookup_objfile_from_block (const struct block *block) |
| 2170 | { |
| 2171 | if (block == NULL) |
| 2172 | return NULL; |
| 2173 | |
| 2174 | block = block_global_block (block); |
| 2175 | /* Look through all blockvectors. */ |
| 2176 | for (objfile *obj : current_program_space->objfiles ()) |
| 2177 | { |
| 2178 | for (compunit_symtab *cust : obj->compunits ()) |
| 2179 | if (block == BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), |
| 2180 | GLOBAL_BLOCK)) |
| 2181 | { |
| 2182 | if (obj->separate_debug_objfile_backlink) |
| 2183 | obj = obj->separate_debug_objfile_backlink; |
| 2184 | |
| 2185 | return obj; |
| 2186 | } |
| 2187 | } |
| 2188 | |
| 2189 | return NULL; |
| 2190 | } |
| 2191 | |
| 2192 | /* See symtab.h. */ |
| 2193 | |
| 2194 | struct symbol * |
| 2195 | lookup_symbol_in_block (const char *name, symbol_name_match_type match_type, |
| 2196 | const struct block *block, |
| 2197 | const domain_enum domain) |
| 2198 | { |
| 2199 | struct symbol *sym; |
| 2200 | |
| 2201 | if (symbol_lookup_debug > 1) |
| 2202 | { |
| 2203 | struct objfile *objfile = lookup_objfile_from_block (block); |
| 2204 | |
| 2205 | fprintf_unfiltered (gdb_stdlog, |
| 2206 | "lookup_symbol_in_block (%s, %s (objfile %s), %s)", |
| 2207 | name, host_address_to_string (block), |
| 2208 | objfile_debug_name (objfile), |
| 2209 | domain_name (domain)); |
| 2210 | } |
| 2211 | |
| 2212 | sym = block_lookup_symbol (block, name, match_type, domain); |
| 2213 | if (sym) |
| 2214 | { |
| 2215 | if (symbol_lookup_debug > 1) |
| 2216 | { |
| 2217 | fprintf_unfiltered (gdb_stdlog, " = %s\n", |
| 2218 | host_address_to_string (sym)); |
| 2219 | } |
| 2220 | return fixup_symbol_section (sym, NULL); |
| 2221 | } |
| 2222 | |
| 2223 | if (symbol_lookup_debug > 1) |
| 2224 | fprintf_unfiltered (gdb_stdlog, " = NULL\n"); |
| 2225 | return NULL; |
| 2226 | } |
| 2227 | |
| 2228 | /* See symtab.h. */ |
| 2229 | |
| 2230 | struct block_symbol |
| 2231 | lookup_global_symbol_from_objfile (struct objfile *main_objfile, |
| 2232 | enum block_enum block_index, |
| 2233 | const char *name, |
| 2234 | const domain_enum domain) |
| 2235 | { |
| 2236 | gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK); |
| 2237 | |
| 2238 | for (objfile *objfile : main_objfile->separate_debug_objfiles ()) |
| 2239 | { |
| 2240 | struct block_symbol result |
| 2241 | = lookup_symbol_in_objfile (objfile, block_index, name, domain); |
| 2242 | |
| 2243 | if (result.symbol != nullptr) |
| 2244 | return result; |
| 2245 | } |
| 2246 | |
| 2247 | return {}; |
| 2248 | } |
| 2249 | |
| 2250 | /* Check to see if the symbol is defined in one of the OBJFILE's |
| 2251 | symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK, |
| 2252 | depending on whether or not we want to search global symbols or |
| 2253 | static symbols. */ |
| 2254 | |
| 2255 | static struct block_symbol |
| 2256 | lookup_symbol_in_objfile_symtabs (struct objfile *objfile, |
| 2257 | enum block_enum block_index, const char *name, |
| 2258 | const domain_enum domain) |
| 2259 | { |
| 2260 | gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK); |
| 2261 | |
| 2262 | if (symbol_lookup_debug > 1) |
| 2263 | { |
| 2264 | fprintf_unfiltered (gdb_stdlog, |
| 2265 | "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)", |
| 2266 | objfile_debug_name (objfile), |
| 2267 | block_index == GLOBAL_BLOCK |
| 2268 | ? "GLOBAL_BLOCK" : "STATIC_BLOCK", |
| 2269 | name, domain_name (domain)); |
| 2270 | } |
| 2271 | |
| 2272 | struct block_symbol other; |
| 2273 | other.symbol = NULL; |
| 2274 | for (compunit_symtab *cust : objfile->compunits ()) |
| 2275 | { |
| 2276 | const struct blockvector *bv; |
| 2277 | const struct block *block; |
| 2278 | struct block_symbol result; |
| 2279 | |
| 2280 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 2281 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 2282 | result.symbol = block_lookup_symbol_primary (block, name, domain); |
| 2283 | result.block = block; |
| 2284 | if (result.symbol == NULL) |
| 2285 | continue; |
| 2286 | if (best_symbol (result.symbol, domain)) |
| 2287 | { |
| 2288 | other = result; |
| 2289 | break; |
| 2290 | } |
| 2291 | if (symbol_matches_domain (result.symbol->language (), |
| 2292 | SYMBOL_DOMAIN (result.symbol), domain)) |
| 2293 | { |
| 2294 | struct symbol *better |
| 2295 | = better_symbol (other.symbol, result.symbol, domain); |
| 2296 | if (better != other.symbol) |
| 2297 | { |
| 2298 | other.symbol = better; |
| 2299 | other.block = block; |
| 2300 | } |
| 2301 | } |
| 2302 | } |
| 2303 | |
| 2304 | if (other.symbol != NULL) |
| 2305 | { |
| 2306 | if (symbol_lookup_debug > 1) |
| 2307 | { |
| 2308 | fprintf_unfiltered (gdb_stdlog, " = %s (block %s)\n", |
| 2309 | host_address_to_string (other.symbol), |
| 2310 | host_address_to_string (other.block)); |
| 2311 | } |
| 2312 | other.symbol = fixup_symbol_section (other.symbol, objfile); |
| 2313 | return other; |
| 2314 | } |
| 2315 | |
| 2316 | if (symbol_lookup_debug > 1) |
| 2317 | fprintf_unfiltered (gdb_stdlog, " = NULL\n"); |
| 2318 | return {}; |
| 2319 | } |
| 2320 | |
| 2321 | /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols. |
| 2322 | Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE |
| 2323 | and all associated separate debug objfiles. |
| 2324 | |
| 2325 | Normally we only look in OBJFILE, and not any separate debug objfiles |
| 2326 | because the outer loop will cause them to be searched too. This case is |
| 2327 | different. Here we're called from search_symbols where it will only |
| 2328 | call us for the objfile that contains a matching minsym. */ |
| 2329 | |
| 2330 | static struct block_symbol |
| 2331 | lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile, |
| 2332 | const char *linkage_name, |
| 2333 | domain_enum domain) |
| 2334 | { |
| 2335 | enum language lang = current_language->la_language; |
| 2336 | struct objfile *main_objfile; |
| 2337 | |
| 2338 | demangle_result_storage storage; |
| 2339 | const char *modified_name = demangle_for_lookup (linkage_name, lang, storage); |
| 2340 | |
| 2341 | if (objfile->separate_debug_objfile_backlink) |
| 2342 | main_objfile = objfile->separate_debug_objfile_backlink; |
| 2343 | else |
| 2344 | main_objfile = objfile; |
| 2345 | |
| 2346 | for (::objfile *cur_objfile : main_objfile->separate_debug_objfiles ()) |
| 2347 | { |
| 2348 | struct block_symbol result; |
| 2349 | |
| 2350 | result = lookup_symbol_in_objfile_symtabs (cur_objfile, GLOBAL_BLOCK, |
| 2351 | modified_name, domain); |
| 2352 | if (result.symbol == NULL) |
| 2353 | result = lookup_symbol_in_objfile_symtabs (cur_objfile, STATIC_BLOCK, |
| 2354 | modified_name, domain); |
| 2355 | if (result.symbol != NULL) |
| 2356 | return result; |
| 2357 | } |
| 2358 | |
| 2359 | return {}; |
| 2360 | } |
| 2361 | |
| 2362 | /* A helper function that throws an exception when a symbol was found |
| 2363 | in a psymtab but not in a symtab. */ |
| 2364 | |
| 2365 | static void ATTRIBUTE_NORETURN |
| 2366 | error_in_psymtab_expansion (enum block_enum block_index, const char *name, |
| 2367 | struct compunit_symtab *cust) |
| 2368 | { |
| 2369 | error (_("\ |
| 2370 | Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\ |
| 2371 | %s may be an inlined function, or may be a template function\n \ |
| 2372 | (if a template, try specifying an instantiation: %s<type>)."), |
| 2373 | block_index == GLOBAL_BLOCK ? "global" : "static", |
| 2374 | name, |
| 2375 | symtab_to_filename_for_display (compunit_primary_filetab (cust)), |
| 2376 | name, name); |
| 2377 | } |
| 2378 | |
| 2379 | /* A helper function for various lookup routines that interfaces with |
| 2380 | the "quick" symbol table functions. */ |
| 2381 | |
| 2382 | static struct block_symbol |
| 2383 | lookup_symbol_via_quick_fns (struct objfile *objfile, |
| 2384 | enum block_enum block_index, const char *name, |
| 2385 | const domain_enum domain) |
| 2386 | { |
| 2387 | struct compunit_symtab *cust; |
| 2388 | const struct blockvector *bv; |
| 2389 | const struct block *block; |
| 2390 | struct block_symbol result; |
| 2391 | |
| 2392 | if (!objfile->sf) |
| 2393 | return {}; |
| 2394 | |
| 2395 | if (symbol_lookup_debug > 1) |
| 2396 | { |
| 2397 | fprintf_unfiltered (gdb_stdlog, |
| 2398 | "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n", |
| 2399 | objfile_debug_name (objfile), |
| 2400 | block_index == GLOBAL_BLOCK |
| 2401 | ? "GLOBAL_BLOCK" : "STATIC_BLOCK", |
| 2402 | name, domain_name (domain)); |
| 2403 | } |
| 2404 | |
| 2405 | cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name, domain); |
| 2406 | if (cust == NULL) |
| 2407 | { |
| 2408 | if (symbol_lookup_debug > 1) |
| 2409 | { |
| 2410 | fprintf_unfiltered (gdb_stdlog, |
| 2411 | "lookup_symbol_via_quick_fns (...) = NULL\n"); |
| 2412 | } |
| 2413 | return {}; |
| 2414 | } |
| 2415 | |
| 2416 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 2417 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 2418 | result.symbol = block_lookup_symbol (block, name, |
| 2419 | symbol_name_match_type::FULL, domain); |
| 2420 | if (result.symbol == NULL) |
| 2421 | error_in_psymtab_expansion (block_index, name, cust); |
| 2422 | |
| 2423 | if (symbol_lookup_debug > 1) |
| 2424 | { |
| 2425 | fprintf_unfiltered (gdb_stdlog, |
| 2426 | "lookup_symbol_via_quick_fns (...) = %s (block %s)\n", |
| 2427 | host_address_to_string (result.symbol), |
| 2428 | host_address_to_string (block)); |
| 2429 | } |
| 2430 | |
| 2431 | result.symbol = fixup_symbol_section (result.symbol, objfile); |
| 2432 | result.block = block; |
| 2433 | return result; |
| 2434 | } |
| 2435 | |
| 2436 | /* See symtab.h. */ |
| 2437 | |
| 2438 | struct block_symbol |
| 2439 | basic_lookup_symbol_nonlocal (const struct language_defn *langdef, |
| 2440 | const char *name, |
| 2441 | const struct block *block, |
| 2442 | const domain_enum domain) |
| 2443 | { |
| 2444 | struct block_symbol result; |
| 2445 | |
| 2446 | /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip |
| 2447 | the current objfile. Searching the current objfile first is useful |
| 2448 | for both matching user expectations as well as performance. */ |
| 2449 | |
| 2450 | result = lookup_symbol_in_static_block (name, block, domain); |
| 2451 | if (result.symbol != NULL) |
| 2452 | return result; |
| 2453 | |
| 2454 | /* If we didn't find a definition for a builtin type in the static block, |
| 2455 | search for it now. This is actually the right thing to do and can be |
| 2456 | a massive performance win. E.g., when debugging a program with lots of |
| 2457 | shared libraries we could search all of them only to find out the |
| 2458 | builtin type isn't defined in any of them. This is common for types |
| 2459 | like "void". */ |
| 2460 | if (domain == VAR_DOMAIN) |
| 2461 | { |
| 2462 | struct gdbarch *gdbarch; |
| 2463 | |
| 2464 | if (block == NULL) |
| 2465 | gdbarch = target_gdbarch (); |
| 2466 | else |
| 2467 | gdbarch = block_gdbarch (block); |
| 2468 | result.symbol = language_lookup_primitive_type_as_symbol (langdef, |
| 2469 | gdbarch, name); |
| 2470 | result.block = NULL; |
| 2471 | if (result.symbol != NULL) |
| 2472 | return result; |
| 2473 | } |
| 2474 | |
| 2475 | return lookup_global_symbol (name, block, domain); |
| 2476 | } |
| 2477 | |
| 2478 | /* See symtab.h. */ |
| 2479 | |
| 2480 | struct block_symbol |
| 2481 | lookup_symbol_in_static_block (const char *name, |
| 2482 | const struct block *block, |
| 2483 | const domain_enum domain) |
| 2484 | { |
| 2485 | const struct block *static_block = block_static_block (block); |
| 2486 | struct symbol *sym; |
| 2487 | |
| 2488 | if (static_block == NULL) |
| 2489 | return {}; |
| 2490 | |
| 2491 | if (symbol_lookup_debug) |
| 2492 | { |
| 2493 | struct objfile *objfile = lookup_objfile_from_block (static_block); |
| 2494 | |
| 2495 | fprintf_unfiltered (gdb_stdlog, |
| 2496 | "lookup_symbol_in_static_block (%s, %s (objfile %s)," |
| 2497 | " %s)\n", |
| 2498 | name, |
| 2499 | host_address_to_string (block), |
| 2500 | objfile_debug_name (objfile), |
| 2501 | domain_name (domain)); |
| 2502 | } |
| 2503 | |
| 2504 | sym = lookup_symbol_in_block (name, |
| 2505 | symbol_name_match_type::FULL, |
| 2506 | static_block, domain); |
| 2507 | if (symbol_lookup_debug) |
| 2508 | { |
| 2509 | fprintf_unfiltered (gdb_stdlog, |
| 2510 | "lookup_symbol_in_static_block (...) = %s\n", |
| 2511 | sym != NULL ? host_address_to_string (sym) : "NULL"); |
| 2512 | } |
| 2513 | return (struct block_symbol) {sym, static_block}; |
| 2514 | } |
| 2515 | |
| 2516 | /* Perform the standard symbol lookup of NAME in OBJFILE: |
| 2517 | 1) First search expanded symtabs, and if not found |
| 2518 | 2) Search the "quick" symtabs (partial or .gdb_index). |
| 2519 | BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */ |
| 2520 | |
| 2521 | static struct block_symbol |
| 2522 | lookup_symbol_in_objfile (struct objfile *objfile, enum block_enum block_index, |
| 2523 | const char *name, const domain_enum domain) |
| 2524 | { |
| 2525 | struct block_symbol result; |
| 2526 | |
| 2527 | gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK); |
| 2528 | |
| 2529 | if (symbol_lookup_debug) |
| 2530 | { |
| 2531 | fprintf_unfiltered (gdb_stdlog, |
| 2532 | "lookup_symbol_in_objfile (%s, %s, %s, %s)\n", |
| 2533 | objfile_debug_name (objfile), |
| 2534 | block_index == GLOBAL_BLOCK |
| 2535 | ? "GLOBAL_BLOCK" : "STATIC_BLOCK", |
| 2536 | name, domain_name (domain)); |
| 2537 | } |
| 2538 | |
| 2539 | result = lookup_symbol_in_objfile_symtabs (objfile, block_index, |
| 2540 | name, domain); |
| 2541 | if (result.symbol != NULL) |
| 2542 | { |
| 2543 | if (symbol_lookup_debug) |
| 2544 | { |
| 2545 | fprintf_unfiltered (gdb_stdlog, |
| 2546 | "lookup_symbol_in_objfile (...) = %s" |
| 2547 | " (in symtabs)\n", |
| 2548 | host_address_to_string (result.symbol)); |
| 2549 | } |
| 2550 | return result; |
| 2551 | } |
| 2552 | |
| 2553 | result = lookup_symbol_via_quick_fns (objfile, block_index, |
| 2554 | name, domain); |
| 2555 | if (symbol_lookup_debug) |
| 2556 | { |
| 2557 | fprintf_unfiltered (gdb_stdlog, |
| 2558 | "lookup_symbol_in_objfile (...) = %s%s\n", |
| 2559 | result.symbol != NULL |
| 2560 | ? host_address_to_string (result.symbol) |
| 2561 | : "NULL", |
| 2562 | result.symbol != NULL ? " (via quick fns)" : ""); |
| 2563 | } |
| 2564 | return result; |
| 2565 | } |
| 2566 | |
| 2567 | /* Find the language for partial symbol with NAME. */ |
| 2568 | |
| 2569 | static enum language |
| 2570 | find_quick_global_symbol_language (const char *name, const domain_enum domain) |
| 2571 | { |
| 2572 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2573 | { |
| 2574 | if (objfile->sf && objfile->sf->qf |
| 2575 | && objfile->sf->qf->lookup_global_symbol_language) |
| 2576 | continue; |
| 2577 | return language_unknown; |
| 2578 | } |
| 2579 | |
| 2580 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2581 | { |
| 2582 | bool symbol_found_p; |
| 2583 | enum language lang |
| 2584 | = objfile->sf->qf->lookup_global_symbol_language (objfile, name, domain, |
| 2585 | &symbol_found_p); |
| 2586 | if (!symbol_found_p) |
| 2587 | continue; |
| 2588 | return lang; |
| 2589 | } |
| 2590 | |
| 2591 | return language_unknown; |
| 2592 | } |
| 2593 | |
| 2594 | /* Private data to be used with lookup_symbol_global_iterator_cb. */ |
| 2595 | |
| 2596 | struct global_or_static_sym_lookup_data |
| 2597 | { |
| 2598 | /* The name of the symbol we are searching for. */ |
| 2599 | const char *name; |
| 2600 | |
| 2601 | /* The domain to use for our search. */ |
| 2602 | domain_enum domain; |
| 2603 | |
| 2604 | /* The block index in which to search. */ |
| 2605 | enum block_enum block_index; |
| 2606 | |
| 2607 | /* The field where the callback should store the symbol if found. |
| 2608 | It should be initialized to {NULL, NULL} before the search is started. */ |
| 2609 | struct block_symbol result; |
| 2610 | }; |
| 2611 | |
| 2612 | /* A callback function for gdbarch_iterate_over_objfiles_in_search_order. |
| 2613 | It searches by name for a symbol in the block given by BLOCK_INDEX of the |
| 2614 | given OBJFILE. The arguments for the search are passed via CB_DATA, which |
| 2615 | in reality is a pointer to struct global_or_static_sym_lookup_data. */ |
| 2616 | |
| 2617 | static int |
| 2618 | lookup_symbol_global_or_static_iterator_cb (struct objfile *objfile, |
| 2619 | void *cb_data) |
| 2620 | { |
| 2621 | struct global_or_static_sym_lookup_data *data = |
| 2622 | (struct global_or_static_sym_lookup_data *) cb_data; |
| 2623 | |
| 2624 | gdb_assert (data->result.symbol == NULL |
| 2625 | && data->result.block == NULL); |
| 2626 | |
| 2627 | data->result = lookup_symbol_in_objfile (objfile, data->block_index, |
| 2628 | data->name, data->domain); |
| 2629 | |
| 2630 | /* If we found a match, tell the iterator to stop. Otherwise, |
| 2631 | keep going. */ |
| 2632 | return (data->result.symbol != NULL); |
| 2633 | } |
| 2634 | |
| 2635 | /* This function contains the common code of lookup_{global,static}_symbol. |
| 2636 | OBJFILE is only used if BLOCK_INDEX is GLOBAL_SCOPE, in which case it is |
| 2637 | the objfile to start the lookup in. */ |
| 2638 | |
| 2639 | static struct block_symbol |
| 2640 | lookup_global_or_static_symbol (const char *name, |
| 2641 | enum block_enum block_index, |
| 2642 | struct objfile *objfile, |
| 2643 | const domain_enum domain) |
| 2644 | { |
| 2645 | struct symbol_cache *cache = get_symbol_cache (current_program_space); |
| 2646 | struct block_symbol result; |
| 2647 | struct global_or_static_sym_lookup_data lookup_data; |
| 2648 | struct block_symbol_cache *bsc; |
| 2649 | struct symbol_cache_slot *slot; |
| 2650 | |
| 2651 | gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK); |
| 2652 | gdb_assert (objfile == nullptr || block_index == GLOBAL_BLOCK); |
| 2653 | |
| 2654 | /* First see if we can find the symbol in the cache. |
| 2655 | This works because we use the current objfile to qualify the lookup. */ |
| 2656 | result = symbol_cache_lookup (cache, objfile, block_index, name, domain, |
| 2657 | &bsc, &slot); |
| 2658 | if (result.symbol != NULL) |
| 2659 | { |
| 2660 | if (SYMBOL_LOOKUP_FAILED_P (result)) |
| 2661 | return {}; |
| 2662 | return result; |
| 2663 | } |
| 2664 | |
| 2665 | /* Do a global search (of global blocks, heh). */ |
| 2666 | if (result.symbol == NULL) |
| 2667 | { |
| 2668 | memset (&lookup_data, 0, sizeof (lookup_data)); |
| 2669 | lookup_data.name = name; |
| 2670 | lookup_data.block_index = block_index; |
| 2671 | lookup_data.domain = domain; |
| 2672 | gdbarch_iterate_over_objfiles_in_search_order |
| 2673 | (objfile != NULL ? objfile->arch () : target_gdbarch (), |
| 2674 | lookup_symbol_global_or_static_iterator_cb, &lookup_data, objfile); |
| 2675 | result = lookup_data.result; |
| 2676 | } |
| 2677 | |
| 2678 | if (result.symbol != NULL) |
| 2679 | symbol_cache_mark_found (bsc, slot, objfile, result.symbol, result.block); |
| 2680 | else |
| 2681 | symbol_cache_mark_not_found (bsc, slot, objfile, name, domain); |
| 2682 | |
| 2683 | return result; |
| 2684 | } |
| 2685 | |
| 2686 | /* See symtab.h. */ |
| 2687 | |
| 2688 | struct block_symbol |
| 2689 | lookup_static_symbol (const char *name, const domain_enum domain) |
| 2690 | { |
| 2691 | return lookup_global_or_static_symbol (name, STATIC_BLOCK, nullptr, domain); |
| 2692 | } |
| 2693 | |
| 2694 | /* See symtab.h. */ |
| 2695 | |
| 2696 | struct block_symbol |
| 2697 | lookup_global_symbol (const char *name, |
| 2698 | const struct block *block, |
| 2699 | const domain_enum domain) |
| 2700 | { |
| 2701 | /* If a block was passed in, we want to search the corresponding |
| 2702 | global block first. This yields "more expected" behavior, and is |
| 2703 | needed to support 'FILENAME'::VARIABLE lookups. */ |
| 2704 | const struct block *global_block = block_global_block (block); |
| 2705 | symbol *sym = NULL; |
| 2706 | if (global_block != nullptr) |
| 2707 | { |
| 2708 | sym = lookup_symbol_in_block (name, |
| 2709 | symbol_name_match_type::FULL, |
| 2710 | global_block, domain); |
| 2711 | if (sym != NULL && best_symbol (sym, domain)) |
| 2712 | return { sym, global_block }; |
| 2713 | } |
| 2714 | |
| 2715 | struct objfile *objfile = lookup_objfile_from_block (block); |
| 2716 | block_symbol bs |
| 2717 | = lookup_global_or_static_symbol (name, GLOBAL_BLOCK, objfile, domain); |
| 2718 | if (better_symbol (sym, bs.symbol, domain) == sym) |
| 2719 | return { sym, global_block }; |
| 2720 | else |
| 2721 | return bs; |
| 2722 | } |
| 2723 | |
| 2724 | bool |
| 2725 | symbol_matches_domain (enum language symbol_language, |
| 2726 | domain_enum symbol_domain, |
| 2727 | domain_enum domain) |
| 2728 | { |
| 2729 | /* For C++ "struct foo { ... }" also defines a typedef for "foo". |
| 2730 | Similarly, any Ada type declaration implicitly defines a typedef. */ |
| 2731 | if (symbol_language == language_cplus |
| 2732 | || symbol_language == language_d |
| 2733 | || symbol_language == language_ada |
| 2734 | || symbol_language == language_rust) |
| 2735 | { |
| 2736 | if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN) |
| 2737 | && symbol_domain == STRUCT_DOMAIN) |
| 2738 | return true; |
| 2739 | } |
| 2740 | /* For all other languages, strict match is required. */ |
| 2741 | return (symbol_domain == domain); |
| 2742 | } |
| 2743 | |
| 2744 | /* See symtab.h. */ |
| 2745 | |
| 2746 | struct type * |
| 2747 | lookup_transparent_type (const char *name) |
| 2748 | { |
| 2749 | return current_language->la_lookup_transparent_type (name); |
| 2750 | } |
| 2751 | |
| 2752 | /* A helper for basic_lookup_transparent_type that interfaces with the |
| 2753 | "quick" symbol table functions. */ |
| 2754 | |
| 2755 | static struct type * |
| 2756 | basic_lookup_transparent_type_quick (struct objfile *objfile, |
| 2757 | enum block_enum block_index, |
| 2758 | const char *name) |
| 2759 | { |
| 2760 | struct compunit_symtab *cust; |
| 2761 | const struct blockvector *bv; |
| 2762 | const struct block *block; |
| 2763 | struct symbol *sym; |
| 2764 | |
| 2765 | if (!objfile->sf) |
| 2766 | return NULL; |
| 2767 | cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name, |
| 2768 | STRUCT_DOMAIN); |
| 2769 | if (cust == NULL) |
| 2770 | return NULL; |
| 2771 | |
| 2772 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 2773 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 2774 | sym = block_find_symbol (block, name, STRUCT_DOMAIN, |
| 2775 | block_find_non_opaque_type, NULL); |
| 2776 | if (sym == NULL) |
| 2777 | error_in_psymtab_expansion (block_index, name, cust); |
| 2778 | gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))); |
| 2779 | return SYMBOL_TYPE (sym); |
| 2780 | } |
| 2781 | |
| 2782 | /* Subroutine of basic_lookup_transparent_type to simplify it. |
| 2783 | Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE. |
| 2784 | BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */ |
| 2785 | |
| 2786 | static struct type * |
| 2787 | basic_lookup_transparent_type_1 (struct objfile *objfile, |
| 2788 | enum block_enum block_index, |
| 2789 | const char *name) |
| 2790 | { |
| 2791 | const struct blockvector *bv; |
| 2792 | const struct block *block; |
| 2793 | const struct symbol *sym; |
| 2794 | |
| 2795 | for (compunit_symtab *cust : objfile->compunits ()) |
| 2796 | { |
| 2797 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 2798 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 2799 | sym = block_find_symbol (block, name, STRUCT_DOMAIN, |
| 2800 | block_find_non_opaque_type, NULL); |
| 2801 | if (sym != NULL) |
| 2802 | { |
| 2803 | gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))); |
| 2804 | return SYMBOL_TYPE (sym); |
| 2805 | } |
| 2806 | } |
| 2807 | |
| 2808 | return NULL; |
| 2809 | } |
| 2810 | |
| 2811 | /* The standard implementation of lookup_transparent_type. This code |
| 2812 | was modeled on lookup_symbol -- the parts not relevant to looking |
| 2813 | up types were just left out. In particular it's assumed here that |
| 2814 | types are available in STRUCT_DOMAIN and only in file-static or |
| 2815 | global blocks. */ |
| 2816 | |
| 2817 | struct type * |
| 2818 | basic_lookup_transparent_type (const char *name) |
| 2819 | { |
| 2820 | struct type *t; |
| 2821 | |
| 2822 | /* Now search all the global symbols. Do the symtab's first, then |
| 2823 | check the psymtab's. If a psymtab indicates the existence |
| 2824 | of the desired name as a global, then do psymtab-to-symtab |
| 2825 | conversion on the fly and return the found symbol. */ |
| 2826 | |
| 2827 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2828 | { |
| 2829 | t = basic_lookup_transparent_type_1 (objfile, GLOBAL_BLOCK, name); |
| 2830 | if (t) |
| 2831 | return t; |
| 2832 | } |
| 2833 | |
| 2834 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2835 | { |
| 2836 | t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name); |
| 2837 | if (t) |
| 2838 | return t; |
| 2839 | } |
| 2840 | |
| 2841 | /* Now search the static file-level symbols. |
| 2842 | Not strictly correct, but more useful than an error. |
| 2843 | Do the symtab's first, then |
| 2844 | check the psymtab's. If a psymtab indicates the existence |
| 2845 | of the desired name as a file-level static, then do psymtab-to-symtab |
| 2846 | conversion on the fly and return the found symbol. */ |
| 2847 | |
| 2848 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2849 | { |
| 2850 | t = basic_lookup_transparent_type_1 (objfile, STATIC_BLOCK, name); |
| 2851 | if (t) |
| 2852 | return t; |
| 2853 | } |
| 2854 | |
| 2855 | for (objfile *objfile : current_program_space->objfiles ()) |
| 2856 | { |
| 2857 | t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name); |
| 2858 | if (t) |
| 2859 | return t; |
| 2860 | } |
| 2861 | |
| 2862 | return (struct type *) 0; |
| 2863 | } |
| 2864 | |
| 2865 | /* See symtab.h. */ |
| 2866 | |
| 2867 | bool |
| 2868 | iterate_over_symbols (const struct block *block, |
| 2869 | const lookup_name_info &name, |
| 2870 | const domain_enum domain, |
| 2871 | gdb::function_view<symbol_found_callback_ftype> callback) |
| 2872 | { |
| 2873 | struct block_iterator iter; |
| 2874 | struct symbol *sym; |
| 2875 | |
| 2876 | ALL_BLOCK_SYMBOLS_WITH_NAME (block, name, iter, sym) |
| 2877 | { |
| 2878 | if (symbol_matches_domain (sym->language (), SYMBOL_DOMAIN (sym), domain)) |
| 2879 | { |
| 2880 | struct block_symbol block_sym = {sym, block}; |
| 2881 | |
| 2882 | if (!callback (&block_sym)) |
| 2883 | return false; |
| 2884 | } |
| 2885 | } |
| 2886 | return true; |
| 2887 | } |
| 2888 | |
| 2889 | /* See symtab.h. */ |
| 2890 | |
| 2891 | bool |
| 2892 | iterate_over_symbols_terminated |
| 2893 | (const struct block *block, |
| 2894 | const lookup_name_info &name, |
| 2895 | const domain_enum domain, |
| 2896 | gdb::function_view<symbol_found_callback_ftype> callback) |
| 2897 | { |
| 2898 | if (!iterate_over_symbols (block, name, domain, callback)) |
| 2899 | return false; |
| 2900 | struct block_symbol block_sym = {nullptr, block}; |
| 2901 | return callback (&block_sym); |
| 2902 | } |
| 2903 | |
| 2904 | /* Find the compunit symtab associated with PC and SECTION. |
| 2905 | This will read in debug info as necessary. */ |
| 2906 | |
| 2907 | struct compunit_symtab * |
| 2908 | find_pc_sect_compunit_symtab (CORE_ADDR pc, struct obj_section *section) |
| 2909 | { |
| 2910 | struct compunit_symtab *best_cust = NULL; |
| 2911 | CORE_ADDR distance = 0; |
| 2912 | struct bound_minimal_symbol msymbol; |
| 2913 | |
| 2914 | /* If we know that this is not a text address, return failure. This is |
| 2915 | necessary because we loop based on the block's high and low code |
| 2916 | addresses, which do not include the data ranges, and because |
| 2917 | we call find_pc_sect_psymtab which has a similar restriction based |
| 2918 | on the partial_symtab's texthigh and textlow. */ |
| 2919 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 2920 | if (msymbol.minsym && msymbol.minsym->data_p ()) |
| 2921 | return NULL; |
| 2922 | |
| 2923 | /* Search all symtabs for the one whose file contains our address, and which |
| 2924 | is the smallest of all the ones containing the address. This is designed |
| 2925 | to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000 |
| 2926 | and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from |
| 2927 | 0x1000-0x4000, but for address 0x2345 we want to return symtab b. |
| 2928 | |
| 2929 | This happens for native ecoff format, where code from included files |
| 2930 | gets its own symtab. The symtab for the included file should have |
| 2931 | been read in already via the dependency mechanism. |
| 2932 | It might be swifter to create several symtabs with the same name |
| 2933 | like xcoff does (I'm not sure). |
| 2934 | |
| 2935 | It also happens for objfiles that have their functions reordered. |
| 2936 | For these, the symtab we are looking for is not necessarily read in. */ |
| 2937 | |
| 2938 | for (objfile *obj_file : current_program_space->objfiles ()) |
| 2939 | { |
| 2940 | for (compunit_symtab *cust : obj_file->compunits ()) |
| 2941 | { |
| 2942 | const struct block *b; |
| 2943 | const struct blockvector *bv; |
| 2944 | |
| 2945 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 2946 | b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 2947 | |
| 2948 | if (BLOCK_START (b) <= pc |
| 2949 | && BLOCK_END (b) > pc |
| 2950 | && (distance == 0 |
| 2951 | || BLOCK_END (b) - BLOCK_START (b) < distance)) |
| 2952 | { |
| 2953 | /* For an objfile that has its functions reordered, |
| 2954 | find_pc_psymtab will find the proper partial symbol table |
| 2955 | and we simply return its corresponding symtab. */ |
| 2956 | /* In order to better support objfiles that contain both |
| 2957 | stabs and coff debugging info, we continue on if a psymtab |
| 2958 | can't be found. */ |
| 2959 | if ((obj_file->flags & OBJF_REORDERED) && obj_file->sf) |
| 2960 | { |
| 2961 | struct compunit_symtab *result; |
| 2962 | |
| 2963 | result |
| 2964 | = obj_file->sf->qf->find_pc_sect_compunit_symtab (obj_file, |
| 2965 | msymbol, |
| 2966 | pc, |
| 2967 | section, |
| 2968 | 0); |
| 2969 | if (result != NULL) |
| 2970 | return result; |
| 2971 | } |
| 2972 | if (section != 0) |
| 2973 | { |
| 2974 | struct block_iterator iter; |
| 2975 | struct symbol *sym = NULL; |
| 2976 | |
| 2977 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 2978 | { |
| 2979 | fixup_symbol_section (sym, obj_file); |
| 2980 | if (matching_obj_sections (SYMBOL_OBJ_SECTION (obj_file, |
| 2981 | sym), |
| 2982 | section)) |
| 2983 | break; |
| 2984 | } |
| 2985 | if (sym == NULL) |
| 2986 | continue; /* No symbol in this symtab matches |
| 2987 | section. */ |
| 2988 | } |
| 2989 | distance = BLOCK_END (b) - BLOCK_START (b); |
| 2990 | best_cust = cust; |
| 2991 | } |
| 2992 | } |
| 2993 | } |
| 2994 | |
| 2995 | if (best_cust != NULL) |
| 2996 | return best_cust; |
| 2997 | |
| 2998 | /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */ |
| 2999 | |
| 3000 | for (objfile *objf : current_program_space->objfiles ()) |
| 3001 | { |
| 3002 | struct compunit_symtab *result; |
| 3003 | |
| 3004 | if (!objf->sf) |
| 3005 | continue; |
| 3006 | result = objf->sf->qf->find_pc_sect_compunit_symtab (objf, |
| 3007 | msymbol, |
| 3008 | pc, section, |
| 3009 | 1); |
| 3010 | if (result != NULL) |
| 3011 | return result; |
| 3012 | } |
| 3013 | |
| 3014 | return NULL; |
| 3015 | } |
| 3016 | |
| 3017 | /* Find the compunit symtab associated with PC. |
| 3018 | This will read in debug info as necessary. |
| 3019 | Backward compatibility, no section. */ |
| 3020 | |
| 3021 | struct compunit_symtab * |
| 3022 | find_pc_compunit_symtab (CORE_ADDR pc) |
| 3023 | { |
| 3024 | return find_pc_sect_compunit_symtab (pc, find_pc_mapped_section (pc)); |
| 3025 | } |
| 3026 | |
| 3027 | /* See symtab.h. */ |
| 3028 | |
| 3029 | struct symbol * |
| 3030 | find_symbol_at_address (CORE_ADDR address) |
| 3031 | { |
| 3032 | for (objfile *objfile : current_program_space->objfiles ()) |
| 3033 | { |
| 3034 | if (objfile->sf == NULL |
| 3035 | || objfile->sf->qf->find_compunit_symtab_by_address == NULL) |
| 3036 | continue; |
| 3037 | |
| 3038 | struct compunit_symtab *symtab |
| 3039 | = objfile->sf->qf->find_compunit_symtab_by_address (objfile, address); |
| 3040 | if (symtab != NULL) |
| 3041 | { |
| 3042 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (symtab); |
| 3043 | |
| 3044 | for (int i = GLOBAL_BLOCK; i <= STATIC_BLOCK; ++i) |
| 3045 | { |
| 3046 | const struct block *b = BLOCKVECTOR_BLOCK (bv, i); |
| 3047 | struct block_iterator iter; |
| 3048 | struct symbol *sym; |
| 3049 | |
| 3050 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3051 | { |
| 3052 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
| 3053 | && SYMBOL_VALUE_ADDRESS (sym) == address) |
| 3054 | return sym; |
| 3055 | } |
| 3056 | } |
| 3057 | } |
| 3058 | } |
| 3059 | |
| 3060 | return NULL; |
| 3061 | } |
| 3062 | |
| 3063 | \f |
| 3064 | |
| 3065 | /* Find the source file and line number for a given PC value and SECTION. |
| 3066 | Return a structure containing a symtab pointer, a line number, |
| 3067 | and a pc range for the entire source line. |
| 3068 | The value's .pc field is NOT the specified pc. |
| 3069 | NOTCURRENT nonzero means, if specified pc is on a line boundary, |
| 3070 | use the line that ends there. Otherwise, in that case, the line |
| 3071 | that begins there is used. */ |
| 3072 | |
| 3073 | /* The big complication here is that a line may start in one file, and end just |
| 3074 | before the start of another file. This usually occurs when you #include |
| 3075 | code in the middle of a subroutine. To properly find the end of a line's PC |
| 3076 | range, we must search all symtabs associated with this compilation unit, and |
| 3077 | find the one whose first PC is closer than that of the next line in this |
| 3078 | symtab. */ |
| 3079 | |
| 3080 | struct symtab_and_line |
| 3081 | find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent) |
| 3082 | { |
| 3083 | struct compunit_symtab *cust; |
| 3084 | struct linetable *l; |
| 3085 | int len; |
| 3086 | struct linetable_entry *item; |
| 3087 | const struct blockvector *bv; |
| 3088 | struct bound_minimal_symbol msymbol; |
| 3089 | |
| 3090 | /* Info on best line seen so far, and where it starts, and its file. */ |
| 3091 | |
| 3092 | struct linetable_entry *best = NULL; |
| 3093 | CORE_ADDR best_end = 0; |
| 3094 | struct symtab *best_symtab = 0; |
| 3095 | |
| 3096 | /* Store here the first line number |
| 3097 | of a file which contains the line at the smallest pc after PC. |
| 3098 | If we don't find a line whose range contains PC, |
| 3099 | we will use a line one less than this, |
| 3100 | with a range from the start of that file to the first line's pc. */ |
| 3101 | struct linetable_entry *alt = NULL; |
| 3102 | |
| 3103 | /* Info on best line seen in this file. */ |
| 3104 | |
| 3105 | struct linetable_entry *prev; |
| 3106 | |
| 3107 | /* If this pc is not from the current frame, |
| 3108 | it is the address of the end of a call instruction. |
| 3109 | Quite likely that is the start of the following statement. |
| 3110 | But what we want is the statement containing the instruction. |
| 3111 | Fudge the pc to make sure we get that. */ |
| 3112 | |
| 3113 | /* It's tempting to assume that, if we can't find debugging info for |
| 3114 | any function enclosing PC, that we shouldn't search for line |
| 3115 | number info, either. However, GAS can emit line number info for |
| 3116 | assembly files --- very helpful when debugging hand-written |
| 3117 | assembly code. In such a case, we'd have no debug info for the |
| 3118 | function, but we would have line info. */ |
| 3119 | |
| 3120 | if (notcurrent) |
| 3121 | pc -= 1; |
| 3122 | |
| 3123 | /* elz: added this because this function returned the wrong |
| 3124 | information if the pc belongs to a stub (import/export) |
| 3125 | to call a shlib function. This stub would be anywhere between |
| 3126 | two functions in the target, and the line info was erroneously |
| 3127 | taken to be the one of the line before the pc. */ |
| 3128 | |
| 3129 | /* RT: Further explanation: |
| 3130 | |
| 3131 | * We have stubs (trampolines) inserted between procedures. |
| 3132 | * |
| 3133 | * Example: "shr1" exists in a shared library, and a "shr1" stub also |
| 3134 | * exists in the main image. |
| 3135 | * |
| 3136 | * In the minimal symbol table, we have a bunch of symbols |
| 3137 | * sorted by start address. The stubs are marked as "trampoline", |
| 3138 | * the others appear as text. E.g.: |
| 3139 | * |
| 3140 | * Minimal symbol table for main image |
| 3141 | * main: code for main (text symbol) |
| 3142 | * shr1: stub (trampoline symbol) |
| 3143 | * foo: code for foo (text symbol) |
| 3144 | * ... |
| 3145 | * Minimal symbol table for "shr1" image: |
| 3146 | * ... |
| 3147 | * shr1: code for shr1 (text symbol) |
| 3148 | * ... |
| 3149 | * |
| 3150 | * So the code below is trying to detect if we are in the stub |
| 3151 | * ("shr1" stub), and if so, find the real code ("shr1" trampoline), |
| 3152 | * and if found, do the symbolization from the real-code address |
| 3153 | * rather than the stub address. |
| 3154 | * |
| 3155 | * Assumptions being made about the minimal symbol table: |
| 3156 | * 1. lookup_minimal_symbol_by_pc() will return a trampoline only |
| 3157 | * if we're really in the trampoline.s If we're beyond it (say |
| 3158 | * we're in "foo" in the above example), it'll have a closer |
| 3159 | * symbol (the "foo" text symbol for example) and will not |
| 3160 | * return the trampoline. |
| 3161 | * 2. lookup_minimal_symbol_text() will find a real text symbol |
| 3162 | * corresponding to the trampoline, and whose address will |
| 3163 | * be different than the trampoline address. I put in a sanity |
| 3164 | * check for the address being the same, to avoid an |
| 3165 | * infinite recursion. |
| 3166 | */ |
| 3167 | msymbol = lookup_minimal_symbol_by_pc (pc); |
| 3168 | if (msymbol.minsym != NULL) |
| 3169 | if (MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline) |
| 3170 | { |
| 3171 | struct bound_minimal_symbol mfunsym |
| 3172 | = lookup_minimal_symbol_text (msymbol.minsym->linkage_name (), |
| 3173 | NULL); |
| 3174 | |
| 3175 | if (mfunsym.minsym == NULL) |
| 3176 | /* I eliminated this warning since it is coming out |
| 3177 | * in the following situation: |
| 3178 | * gdb shmain // test program with shared libraries |
| 3179 | * (gdb) break shr1 // function in shared lib |
| 3180 | * Warning: In stub for ... |
| 3181 | * In the above situation, the shared lib is not loaded yet, |
| 3182 | * so of course we can't find the real func/line info, |
| 3183 | * but the "break" still works, and the warning is annoying. |
| 3184 | * So I commented out the warning. RT */ |
| 3185 | /* warning ("In stub for %s; unable to find real function/line info", |
| 3186 | msymbol->linkage_name ()); */ |
| 3187 | ; |
| 3188 | /* fall through */ |
| 3189 | else if (BMSYMBOL_VALUE_ADDRESS (mfunsym) |
| 3190 | == BMSYMBOL_VALUE_ADDRESS (msymbol)) |
| 3191 | /* Avoid infinite recursion */ |
| 3192 | /* See above comment about why warning is commented out. */ |
| 3193 | /* warning ("In stub for %s; unable to find real function/line info", |
| 3194 | msymbol->linkage_name ()); */ |
| 3195 | ; |
| 3196 | /* fall through */ |
| 3197 | else |
| 3198 | { |
| 3199 | /* Detect an obvious case of infinite recursion. If this |
| 3200 | should occur, we'd like to know about it, so error out, |
| 3201 | fatally. */ |
| 3202 | if (BMSYMBOL_VALUE_ADDRESS (mfunsym) == pc) |
| 3203 | internal_error (__FILE__, __LINE__, |
| 3204 | _("Infinite recursion detected in find_pc_sect_line;" |
| 3205 | "please file a bug report")); |
| 3206 | |
| 3207 | return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0); |
| 3208 | } |
| 3209 | } |
| 3210 | |
| 3211 | symtab_and_line val; |
| 3212 | val.pspace = current_program_space; |
| 3213 | |
| 3214 | cust = find_pc_sect_compunit_symtab (pc, section); |
| 3215 | if (cust == NULL) |
| 3216 | { |
| 3217 | /* If no symbol information, return previous pc. */ |
| 3218 | if (notcurrent) |
| 3219 | pc++; |
| 3220 | val.pc = pc; |
| 3221 | return val; |
| 3222 | } |
| 3223 | |
| 3224 | bv = COMPUNIT_BLOCKVECTOR (cust); |
| 3225 | |
| 3226 | /* Look at all the symtabs that share this blockvector. |
| 3227 | They all have the same apriori range, that we found was right; |
| 3228 | but they have different line tables. */ |
| 3229 | |
| 3230 | for (symtab *iter_s : compunit_filetabs (cust)) |
| 3231 | { |
| 3232 | /* Find the best line in this symtab. */ |
| 3233 | l = SYMTAB_LINETABLE (iter_s); |
| 3234 | if (!l) |
| 3235 | continue; |
| 3236 | len = l->nitems; |
| 3237 | if (len <= 0) |
| 3238 | { |
| 3239 | /* I think len can be zero if the symtab lacks line numbers |
| 3240 | (e.g. gcc -g1). (Either that or the LINETABLE is NULL; |
| 3241 | I'm not sure which, and maybe it depends on the symbol |
| 3242 | reader). */ |
| 3243 | continue; |
| 3244 | } |
| 3245 | |
| 3246 | prev = NULL; |
| 3247 | item = l->item; /* Get first line info. */ |
| 3248 | |
| 3249 | /* Is this file's first line closer than the first lines of other files? |
| 3250 | If so, record this file, and its first line, as best alternate. */ |
| 3251 | if (item->pc > pc && (!alt || item->pc < alt->pc)) |
| 3252 | alt = item; |
| 3253 | |
| 3254 | auto pc_compare = [](const CORE_ADDR & comp_pc, |
| 3255 | const struct linetable_entry & lhs)->bool |
| 3256 | { |
| 3257 | return comp_pc < lhs.pc; |
| 3258 | }; |
| 3259 | |
| 3260 | struct linetable_entry *first = item; |
| 3261 | struct linetable_entry *last = item + len; |
| 3262 | item = std::upper_bound (first, last, pc, pc_compare); |
| 3263 | if (item != first) |
| 3264 | { |
| 3265 | /* Found a matching item. Skip backwards over any end of |
| 3266 | sequence markers. */ |
| 3267 | for (prev = item - 1; prev->line == 0 && prev != first; prev--) |
| 3268 | /* Nothing. */; |
| 3269 | } |
| 3270 | |
| 3271 | /* At this point, prev points at the line whose start addr is <= pc, and |
| 3272 | item points at the next line. If we ran off the end of the linetable |
| 3273 | (pc >= start of the last line), then prev == item. If pc < start of |
| 3274 | the first line, prev will not be set. */ |
| 3275 | |
| 3276 | /* Is this file's best line closer than the best in the other files? |
| 3277 | If so, record this file, and its best line, as best so far. Don't |
| 3278 | save prev if it represents the end of a function (i.e. line number |
| 3279 | 0) instead of a real line. */ |
| 3280 | |
| 3281 | if (prev && prev->line && (!best || prev->pc > best->pc)) |
| 3282 | { |
| 3283 | best = prev; |
| 3284 | best_symtab = iter_s; |
| 3285 | |
| 3286 | /* If during the binary search we land on a non-statement entry, |
| 3287 | scan backward through entries at the same address to see if |
| 3288 | there is an entry marked as is-statement. In theory this |
| 3289 | duplication should have been removed from the line table |
| 3290 | during construction, this is just a double check. If the line |
| 3291 | table has had the duplication removed then this should be |
| 3292 | pretty cheap. */ |
| 3293 | if (!best->is_stmt) |
| 3294 | { |
| 3295 | struct linetable_entry *tmp = best; |
| 3296 | while (tmp > first && (tmp - 1)->pc == tmp->pc |
| 3297 | && (tmp - 1)->line != 0 && !tmp->is_stmt) |
| 3298 | --tmp; |
| 3299 | if (tmp->is_stmt) |
| 3300 | best = tmp; |
| 3301 | } |
| 3302 | |
| 3303 | /* Discard BEST_END if it's before the PC of the current BEST. */ |
| 3304 | if (best_end <= best->pc) |
| 3305 | best_end = 0; |
| 3306 | } |
| 3307 | |
| 3308 | /* If another line (denoted by ITEM) is in the linetable and its |
| 3309 | PC is after BEST's PC, but before the current BEST_END, then |
| 3310 | use ITEM's PC as the new best_end. */ |
| 3311 | if (best && item < last && item->pc > best->pc |
| 3312 | && (best_end == 0 || best_end > item->pc)) |
| 3313 | best_end = item->pc; |
| 3314 | } |
| 3315 | |
| 3316 | if (!best_symtab) |
| 3317 | { |
| 3318 | /* If we didn't find any line number info, just return zeros. |
| 3319 | We used to return alt->line - 1 here, but that could be |
| 3320 | anywhere; if we don't have line number info for this PC, |
| 3321 | don't make some up. */ |
| 3322 | val.pc = pc; |
| 3323 | } |
| 3324 | else if (best->line == 0) |
| 3325 | { |
| 3326 | /* If our best fit is in a range of PC's for which no line |
| 3327 | number info is available (line number is zero) then we didn't |
| 3328 | find any valid line information. */ |
| 3329 | val.pc = pc; |
| 3330 | } |
| 3331 | else |
| 3332 | { |
| 3333 | val.is_stmt = best->is_stmt; |
| 3334 | val.symtab = best_symtab; |
| 3335 | val.line = best->line; |
| 3336 | val.pc = best->pc; |
| 3337 | if (best_end && (!alt || best_end < alt->pc)) |
| 3338 | val.end = best_end; |
| 3339 | else if (alt) |
| 3340 | val.end = alt->pc; |
| 3341 | else |
| 3342 | val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); |
| 3343 | } |
| 3344 | val.section = section; |
| 3345 | return val; |
| 3346 | } |
| 3347 | |
| 3348 | /* Backward compatibility (no section). */ |
| 3349 | |
| 3350 | struct symtab_and_line |
| 3351 | find_pc_line (CORE_ADDR pc, int notcurrent) |
| 3352 | { |
| 3353 | struct obj_section *section; |
| 3354 | |
| 3355 | section = find_pc_overlay (pc); |
| 3356 | if (pc_in_unmapped_range (pc, section)) |
| 3357 | pc = overlay_mapped_address (pc, section); |
| 3358 | return find_pc_sect_line (pc, section, notcurrent); |
| 3359 | } |
| 3360 | |
| 3361 | /* See symtab.h. */ |
| 3362 | |
| 3363 | struct symtab * |
| 3364 | find_pc_line_symtab (CORE_ADDR pc) |
| 3365 | { |
| 3366 | struct symtab_and_line sal; |
| 3367 | |
| 3368 | /* This always passes zero for NOTCURRENT to find_pc_line. |
| 3369 | There are currently no callers that ever pass non-zero. */ |
| 3370 | sal = find_pc_line (pc, 0); |
| 3371 | return sal.symtab; |
| 3372 | } |
| 3373 | \f |
| 3374 | /* Find line number LINE in any symtab whose name is the same as |
| 3375 | SYMTAB. |
| 3376 | |
| 3377 | If found, return the symtab that contains the linetable in which it was |
| 3378 | found, set *INDEX to the index in the linetable of the best entry |
| 3379 | found, and set *EXACT_MATCH to true if the value returned is an |
| 3380 | exact match. |
| 3381 | |
| 3382 | If not found, return NULL. */ |
| 3383 | |
| 3384 | struct symtab * |
| 3385 | find_line_symtab (struct symtab *sym_tab, int line, |
| 3386 | int *index, bool *exact_match) |
| 3387 | { |
| 3388 | int exact = 0; /* Initialized here to avoid a compiler warning. */ |
| 3389 | |
| 3390 | /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE |
| 3391 | so far seen. */ |
| 3392 | |
| 3393 | int best_index; |
| 3394 | struct linetable *best_linetable; |
| 3395 | struct symtab *best_symtab; |
| 3396 | |
| 3397 | /* First try looking it up in the given symtab. */ |
| 3398 | best_linetable = SYMTAB_LINETABLE (sym_tab); |
| 3399 | best_symtab = sym_tab; |
| 3400 | best_index = find_line_common (best_linetable, line, &exact, 0); |
| 3401 | if (best_index < 0 || !exact) |
| 3402 | { |
| 3403 | /* Didn't find an exact match. So we better keep looking for |
| 3404 | another symtab with the same name. In the case of xcoff, |
| 3405 | multiple csects for one source file (produced by IBM's FORTRAN |
| 3406 | compiler) produce multiple symtabs (this is unavoidable |
| 3407 | assuming csects can be at arbitrary places in memory and that |
| 3408 | the GLOBAL_BLOCK of a symtab has a begin and end address). */ |
| 3409 | |
| 3410 | /* BEST is the smallest linenumber > LINE so far seen, |
| 3411 | or 0 if none has been seen so far. |
| 3412 | BEST_INDEX and BEST_LINETABLE identify the item for it. */ |
| 3413 | int best; |
| 3414 | |
| 3415 | if (best_index >= 0) |
| 3416 | best = best_linetable->item[best_index].line; |
| 3417 | else |
| 3418 | best = 0; |
| 3419 | |
| 3420 | for (objfile *objfile : current_program_space->objfiles ()) |
| 3421 | { |
| 3422 | if (objfile->sf) |
| 3423 | objfile->sf->qf->expand_symtabs_with_fullname |
| 3424 | (objfile, symtab_to_fullname (sym_tab)); |
| 3425 | } |
| 3426 | |
| 3427 | for (objfile *objfile : current_program_space->objfiles ()) |
| 3428 | { |
| 3429 | for (compunit_symtab *cu : objfile->compunits ()) |
| 3430 | { |
| 3431 | for (symtab *s : compunit_filetabs (cu)) |
| 3432 | { |
| 3433 | struct linetable *l; |
| 3434 | int ind; |
| 3435 | |
| 3436 | if (FILENAME_CMP (sym_tab->filename, s->filename) != 0) |
| 3437 | continue; |
| 3438 | if (FILENAME_CMP (symtab_to_fullname (sym_tab), |
| 3439 | symtab_to_fullname (s)) != 0) |
| 3440 | continue; |
| 3441 | l = SYMTAB_LINETABLE (s); |
| 3442 | ind = find_line_common (l, line, &exact, 0); |
| 3443 | if (ind >= 0) |
| 3444 | { |
| 3445 | if (exact) |
| 3446 | { |
| 3447 | best_index = ind; |
| 3448 | best_linetable = l; |
| 3449 | best_symtab = s; |
| 3450 | goto done; |
| 3451 | } |
| 3452 | if (best == 0 || l->item[ind].line < best) |
| 3453 | { |
| 3454 | best = l->item[ind].line; |
| 3455 | best_index = ind; |
| 3456 | best_linetable = l; |
| 3457 | best_symtab = s; |
| 3458 | } |
| 3459 | } |
| 3460 | } |
| 3461 | } |
| 3462 | } |
| 3463 | } |
| 3464 | done: |
| 3465 | if (best_index < 0) |
| 3466 | return NULL; |
| 3467 | |
| 3468 | if (index) |
| 3469 | *index = best_index; |
| 3470 | if (exact_match) |
| 3471 | *exact_match = (exact != 0); |
| 3472 | |
| 3473 | return best_symtab; |
| 3474 | } |
| 3475 | |
| 3476 | /* Given SYMTAB, returns all the PCs function in the symtab that |
| 3477 | exactly match LINE. Returns an empty vector if there are no exact |
| 3478 | matches, but updates BEST_ITEM in this case. */ |
| 3479 | |
| 3480 | std::vector<CORE_ADDR> |
| 3481 | find_pcs_for_symtab_line (struct symtab *symtab, int line, |
| 3482 | struct linetable_entry **best_item) |
| 3483 | { |
| 3484 | int start = 0; |
| 3485 | std::vector<CORE_ADDR> result; |
| 3486 | |
| 3487 | /* First, collect all the PCs that are at this line. */ |
| 3488 | while (1) |
| 3489 | { |
| 3490 | int was_exact; |
| 3491 | int idx; |
| 3492 | |
| 3493 | idx = find_line_common (SYMTAB_LINETABLE (symtab), line, &was_exact, |
| 3494 | start); |
| 3495 | if (idx < 0) |
| 3496 | break; |
| 3497 | |
| 3498 | if (!was_exact) |
| 3499 | { |
| 3500 | struct linetable_entry *item = &SYMTAB_LINETABLE (symtab)->item[idx]; |
| 3501 | |
| 3502 | if (*best_item == NULL |
| 3503 | || (item->line < (*best_item)->line && item->is_stmt)) |
| 3504 | *best_item = item; |
| 3505 | |
| 3506 | break; |
| 3507 | } |
| 3508 | |
| 3509 | result.push_back (SYMTAB_LINETABLE (symtab)->item[idx].pc); |
| 3510 | start = idx + 1; |
| 3511 | } |
| 3512 | |
| 3513 | return result; |
| 3514 | } |
| 3515 | |
| 3516 | \f |
| 3517 | /* Set the PC value for a given source file and line number and return true. |
| 3518 | Returns false for invalid line number (and sets the PC to 0). |
| 3519 | The source file is specified with a struct symtab. */ |
| 3520 | |
| 3521 | bool |
| 3522 | find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc) |
| 3523 | { |
| 3524 | struct linetable *l; |
| 3525 | int ind; |
| 3526 | |
| 3527 | *pc = 0; |
| 3528 | if (symtab == 0) |
| 3529 | return false; |
| 3530 | |
| 3531 | symtab = find_line_symtab (symtab, line, &ind, NULL); |
| 3532 | if (symtab != NULL) |
| 3533 | { |
| 3534 | l = SYMTAB_LINETABLE (symtab); |
| 3535 | *pc = l->item[ind].pc; |
| 3536 | return true; |
| 3537 | } |
| 3538 | else |
| 3539 | return false; |
| 3540 | } |
| 3541 | |
| 3542 | /* Find the range of pc values in a line. |
| 3543 | Store the starting pc of the line into *STARTPTR |
| 3544 | and the ending pc (start of next line) into *ENDPTR. |
| 3545 | Returns true to indicate success. |
| 3546 | Returns false if could not find the specified line. */ |
| 3547 | |
| 3548 | bool |
| 3549 | find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr, |
| 3550 | CORE_ADDR *endptr) |
| 3551 | { |
| 3552 | CORE_ADDR startaddr; |
| 3553 | struct symtab_and_line found_sal; |
| 3554 | |
| 3555 | startaddr = sal.pc; |
| 3556 | if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr)) |
| 3557 | return false; |
| 3558 | |
| 3559 | /* This whole function is based on address. For example, if line 10 has |
| 3560 | two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then |
| 3561 | "info line *0x123" should say the line goes from 0x100 to 0x200 |
| 3562 | and "info line *0x355" should say the line goes from 0x300 to 0x400. |
| 3563 | This also insures that we never give a range like "starts at 0x134 |
| 3564 | and ends at 0x12c". */ |
| 3565 | |
| 3566 | found_sal = find_pc_sect_line (startaddr, sal.section, 0); |
| 3567 | if (found_sal.line != sal.line) |
| 3568 | { |
| 3569 | /* The specified line (sal) has zero bytes. */ |
| 3570 | *startptr = found_sal.pc; |
| 3571 | *endptr = found_sal.pc; |
| 3572 | } |
| 3573 | else |
| 3574 | { |
| 3575 | *startptr = found_sal.pc; |
| 3576 | *endptr = found_sal.end; |
| 3577 | } |
| 3578 | return true; |
| 3579 | } |
| 3580 | |
| 3581 | /* Given a line table and a line number, return the index into the line |
| 3582 | table for the pc of the nearest line whose number is >= the specified one. |
| 3583 | Return -1 if none is found. The value is >= 0 if it is an index. |
| 3584 | START is the index at which to start searching the line table. |
| 3585 | |
| 3586 | Set *EXACT_MATCH nonzero if the value returned is an exact match. */ |
| 3587 | |
| 3588 | static int |
| 3589 | find_line_common (struct linetable *l, int lineno, |
| 3590 | int *exact_match, int start) |
| 3591 | { |
| 3592 | int i; |
| 3593 | int len; |
| 3594 | |
| 3595 | /* BEST is the smallest linenumber > LINENO so far seen, |
| 3596 | or 0 if none has been seen so far. |
| 3597 | BEST_INDEX identifies the item for it. */ |
| 3598 | |
| 3599 | int best_index = -1; |
| 3600 | int best = 0; |
| 3601 | |
| 3602 | *exact_match = 0; |
| 3603 | |
| 3604 | if (lineno <= 0) |
| 3605 | return -1; |
| 3606 | if (l == 0) |
| 3607 | return -1; |
| 3608 | |
| 3609 | len = l->nitems; |
| 3610 | for (i = start; i < len; i++) |
| 3611 | { |
| 3612 | struct linetable_entry *item = &(l->item[i]); |
| 3613 | |
| 3614 | /* Ignore non-statements. */ |
| 3615 | if (!item->is_stmt) |
| 3616 | continue; |
| 3617 | |
| 3618 | if (item->line == lineno) |
| 3619 | { |
| 3620 | /* Return the first (lowest address) entry which matches. */ |
| 3621 | *exact_match = 1; |
| 3622 | return i; |
| 3623 | } |
| 3624 | |
| 3625 | if (item->line > lineno && (best == 0 || item->line < best)) |
| 3626 | { |
| 3627 | best = item->line; |
| 3628 | best_index = i; |
| 3629 | } |
| 3630 | } |
| 3631 | |
| 3632 | /* If we got here, we didn't get an exact match. */ |
| 3633 | return best_index; |
| 3634 | } |
| 3635 | |
| 3636 | bool |
| 3637 | find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr) |
| 3638 | { |
| 3639 | struct symtab_and_line sal; |
| 3640 | |
| 3641 | sal = find_pc_line (pc, 0); |
| 3642 | *startptr = sal.pc; |
| 3643 | *endptr = sal.end; |
| 3644 | return sal.symtab != 0; |
| 3645 | } |
| 3646 | |
| 3647 | /* Helper for find_function_start_sal. Does most of the work, except |
| 3648 | setting the sal's symbol. */ |
| 3649 | |
| 3650 | static symtab_and_line |
| 3651 | find_function_start_sal_1 (CORE_ADDR func_addr, obj_section *section, |
| 3652 | bool funfirstline) |
| 3653 | { |
| 3654 | symtab_and_line sal = find_pc_sect_line (func_addr, section, 0); |
| 3655 | |
| 3656 | if (funfirstline && sal.symtab != NULL |
| 3657 | && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal.symtab)) |
| 3658 | || SYMTAB_LANGUAGE (sal.symtab) == language_asm)) |
| 3659 | { |
| 3660 | struct gdbarch *gdbarch = SYMTAB_OBJFILE (sal.symtab)->arch (); |
| 3661 | |
| 3662 | sal.pc = func_addr; |
| 3663 | if (gdbarch_skip_entrypoint_p (gdbarch)) |
| 3664 | sal.pc = gdbarch_skip_entrypoint (gdbarch, sal.pc); |
| 3665 | return sal; |
| 3666 | } |
| 3667 | |
| 3668 | /* We always should have a line for the function start address. |
| 3669 | If we don't, something is odd. Create a plain SAL referring |
| 3670 | just the PC and hope that skip_prologue_sal (if requested) |
| 3671 | can find a line number for after the prologue. */ |
| 3672 | if (sal.pc < func_addr) |
| 3673 | { |
| 3674 | sal = {}; |
| 3675 | sal.pspace = current_program_space; |
| 3676 | sal.pc = func_addr; |
| 3677 | sal.section = section; |
| 3678 | } |
| 3679 | |
| 3680 | if (funfirstline) |
| 3681 | skip_prologue_sal (&sal); |
| 3682 | |
| 3683 | return sal; |
| 3684 | } |
| 3685 | |
| 3686 | /* See symtab.h. */ |
| 3687 | |
| 3688 | symtab_and_line |
| 3689 | find_function_start_sal (CORE_ADDR func_addr, obj_section *section, |
| 3690 | bool funfirstline) |
| 3691 | { |
| 3692 | symtab_and_line sal |
| 3693 | = find_function_start_sal_1 (func_addr, section, funfirstline); |
| 3694 | |
| 3695 | /* find_function_start_sal_1 does a linetable search, so it finds |
| 3696 | the symtab and linenumber, but not a symbol. Fill in the |
| 3697 | function symbol too. */ |
| 3698 | sal.symbol = find_pc_sect_containing_function (sal.pc, sal.section); |
| 3699 | |
| 3700 | return sal; |
| 3701 | } |
| 3702 | |
| 3703 | /* See symtab.h. */ |
| 3704 | |
| 3705 | symtab_and_line |
| 3706 | find_function_start_sal (symbol *sym, bool funfirstline) |
| 3707 | { |
| 3708 | fixup_symbol_section (sym, NULL); |
| 3709 | symtab_and_line sal |
| 3710 | = find_function_start_sal_1 (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)), |
| 3711 | SYMBOL_OBJ_SECTION (symbol_objfile (sym), sym), |
| 3712 | funfirstline); |
| 3713 | sal.symbol = sym; |
| 3714 | return sal; |
| 3715 | } |
| 3716 | |
| 3717 | |
| 3718 | /* Given a function start address FUNC_ADDR and SYMTAB, find the first |
| 3719 | address for that function that has an entry in SYMTAB's line info |
| 3720 | table. If such an entry cannot be found, return FUNC_ADDR |
| 3721 | unaltered. */ |
| 3722 | |
| 3723 | static CORE_ADDR |
| 3724 | skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab) |
| 3725 | { |
| 3726 | CORE_ADDR func_start, func_end; |
| 3727 | struct linetable *l; |
| 3728 | int i; |
| 3729 | |
| 3730 | /* Give up if this symbol has no lineinfo table. */ |
| 3731 | l = SYMTAB_LINETABLE (symtab); |
| 3732 | if (l == NULL) |
| 3733 | return func_addr; |
| 3734 | |
| 3735 | /* Get the range for the function's PC values, or give up if we |
| 3736 | cannot, for some reason. */ |
| 3737 | if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end)) |
| 3738 | return func_addr; |
| 3739 | |
| 3740 | /* Linetable entries are ordered by PC values, see the commentary in |
| 3741 | symtab.h where `struct linetable' is defined. Thus, the first |
| 3742 | entry whose PC is in the range [FUNC_START..FUNC_END[ is the |
| 3743 | address we are looking for. */ |
| 3744 | for (i = 0; i < l->nitems; i++) |
| 3745 | { |
| 3746 | struct linetable_entry *item = &(l->item[i]); |
| 3747 | |
| 3748 | /* Don't use line numbers of zero, they mark special entries in |
| 3749 | the table. See the commentary on symtab.h before the |
| 3750 | definition of struct linetable. */ |
| 3751 | if (item->line > 0 && func_start <= item->pc && item->pc < func_end) |
| 3752 | return item->pc; |
| 3753 | } |
| 3754 | |
| 3755 | return func_addr; |
| 3756 | } |
| 3757 | |
| 3758 | /* Adjust SAL to the first instruction past the function prologue. |
| 3759 | If the PC was explicitly specified, the SAL is not changed. |
| 3760 | If the line number was explicitly specified then the SAL can still be |
| 3761 | updated, unless the language for SAL is assembler, in which case the SAL |
| 3762 | will be left unchanged. |
| 3763 | If SAL is already past the prologue, then do nothing. */ |
| 3764 | |
| 3765 | void |
| 3766 | skip_prologue_sal (struct symtab_and_line *sal) |
| 3767 | { |
| 3768 | struct symbol *sym; |
| 3769 | struct symtab_and_line start_sal; |
| 3770 | CORE_ADDR pc, saved_pc; |
| 3771 | struct obj_section *section; |
| 3772 | const char *name; |
| 3773 | struct objfile *objfile; |
| 3774 | struct gdbarch *gdbarch; |
| 3775 | const struct block *b, *function_block; |
| 3776 | int force_skip, skip; |
| 3777 | |
| 3778 | /* Do not change the SAL if PC was specified explicitly. */ |
| 3779 | if (sal->explicit_pc) |
| 3780 | return; |
| 3781 | |
| 3782 | /* In assembly code, if the user asks for a specific line then we should |
| 3783 | not adjust the SAL. The user already has instruction level |
| 3784 | visibility in this case, so selecting a line other than one requested |
| 3785 | is likely to be the wrong choice. */ |
| 3786 | if (sal->symtab != nullptr |
| 3787 | && sal->explicit_line |
| 3788 | && SYMTAB_LANGUAGE (sal->symtab) == language_asm) |
| 3789 | return; |
| 3790 | |
| 3791 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| 3792 | |
| 3793 | switch_to_program_space_and_thread (sal->pspace); |
| 3794 | |
| 3795 | sym = find_pc_sect_function (sal->pc, sal->section); |
| 3796 | if (sym != NULL) |
| 3797 | { |
| 3798 | fixup_symbol_section (sym, NULL); |
| 3799 | |
| 3800 | objfile = symbol_objfile (sym); |
| 3801 | pc = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)); |
| 3802 | section = SYMBOL_OBJ_SECTION (objfile, sym); |
| 3803 | name = sym->linkage_name (); |
| 3804 | } |
| 3805 | else |
| 3806 | { |
| 3807 | struct bound_minimal_symbol msymbol |
| 3808 | = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section); |
| 3809 | |
| 3810 | if (msymbol.minsym == NULL) |
| 3811 | return; |
| 3812 | |
| 3813 | objfile = msymbol.objfile; |
| 3814 | pc = BMSYMBOL_VALUE_ADDRESS (msymbol); |
| 3815 | section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym); |
| 3816 | name = msymbol.minsym->linkage_name (); |
| 3817 | } |
| 3818 | |
| 3819 | gdbarch = objfile->arch (); |
| 3820 | |
| 3821 | /* Process the prologue in two passes. In the first pass try to skip the |
| 3822 | prologue (SKIP is true) and verify there is a real need for it (indicated |
| 3823 | by FORCE_SKIP). If no such reason was found run a second pass where the |
| 3824 | prologue is not skipped (SKIP is false). */ |
| 3825 | |
| 3826 | skip = 1; |
| 3827 | force_skip = 1; |
| 3828 | |
| 3829 | /* Be conservative - allow direct PC (without skipping prologue) only if we |
| 3830 | have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not |
| 3831 | have to be set by the caller so we use SYM instead. */ |
| 3832 | if (sym != NULL |
| 3833 | && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym)))) |
| 3834 | force_skip = 0; |
| 3835 | |
| 3836 | saved_pc = pc; |
| 3837 | do |
| 3838 | { |
| 3839 | pc = saved_pc; |
| 3840 | |
| 3841 | /* If the function is in an unmapped overlay, use its unmapped LMA address, |
| 3842 | so that gdbarch_skip_prologue has something unique to work on. */ |
| 3843 | if (section_is_overlay (section) && !section_is_mapped (section)) |
| 3844 | pc = overlay_unmapped_address (pc, section); |
| 3845 | |
| 3846 | /* Skip "first line" of function (which is actually its prologue). */ |
| 3847 | pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 3848 | if (gdbarch_skip_entrypoint_p (gdbarch)) |
| 3849 | pc = gdbarch_skip_entrypoint (gdbarch, pc); |
| 3850 | if (skip) |
| 3851 | pc = gdbarch_skip_prologue_noexcept (gdbarch, pc); |
| 3852 | |
| 3853 | /* For overlays, map pc back into its mapped VMA range. */ |
| 3854 | pc = overlay_mapped_address (pc, section); |
| 3855 | |
| 3856 | /* Calculate line number. */ |
| 3857 | start_sal = find_pc_sect_line (pc, section, 0); |
| 3858 | |
| 3859 | /* Check if gdbarch_skip_prologue left us in mid-line, and the next |
| 3860 | line is still part of the same function. */ |
| 3861 | if (skip && start_sal.pc != pc |
| 3862 | && (sym ? (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end |
| 3863 | && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym))) |
| 3864 | : (lookup_minimal_symbol_by_pc_section (start_sal.end, section).minsym |
| 3865 | == lookup_minimal_symbol_by_pc_section (pc, section).minsym))) |
| 3866 | { |
| 3867 | /* First pc of next line */ |
| 3868 | pc = start_sal.end; |
| 3869 | /* Recalculate the line number (might not be N+1). */ |
| 3870 | start_sal = find_pc_sect_line (pc, section, 0); |
| 3871 | } |
| 3872 | |
| 3873 | /* On targets with executable formats that don't have a concept of |
| 3874 | constructors (ELF with .init has, PE doesn't), gcc emits a call |
| 3875 | to `__main' in `main' between the prologue and before user |
| 3876 | code. */ |
| 3877 | if (gdbarch_skip_main_prologue_p (gdbarch) |
| 3878 | && name && strcmp_iw (name, "main") == 0) |
| 3879 | { |
| 3880 | pc = gdbarch_skip_main_prologue (gdbarch, pc); |
| 3881 | /* Recalculate the line number (might not be N+1). */ |
| 3882 | start_sal = find_pc_sect_line (pc, section, 0); |
| 3883 | force_skip = 1; |
| 3884 | } |
| 3885 | } |
| 3886 | while (!force_skip && skip--); |
| 3887 | |
| 3888 | /* If we still don't have a valid source line, try to find the first |
| 3889 | PC in the lineinfo table that belongs to the same function. This |
| 3890 | happens with COFF debug info, which does not seem to have an |
| 3891 | entry in lineinfo table for the code after the prologue which has |
| 3892 | no direct relation to source. For example, this was found to be |
| 3893 | the case with the DJGPP target using "gcc -gcoff" when the |
| 3894 | compiler inserted code after the prologue to make sure the stack |
| 3895 | is aligned. */ |
| 3896 | if (!force_skip && sym && start_sal.symtab == NULL) |
| 3897 | { |
| 3898 | pc = skip_prologue_using_lineinfo (pc, symbol_symtab (sym)); |
| 3899 | /* Recalculate the line number. */ |
| 3900 | start_sal = find_pc_sect_line (pc, section, 0); |
| 3901 | } |
| 3902 | |
| 3903 | /* If we're already past the prologue, leave SAL unchanged. Otherwise |
| 3904 | forward SAL to the end of the prologue. */ |
| 3905 | if (sal->pc >= pc) |
| 3906 | return; |
| 3907 | |
| 3908 | sal->pc = pc; |
| 3909 | sal->section = section; |
| 3910 | sal->symtab = start_sal.symtab; |
| 3911 | sal->line = start_sal.line; |
| 3912 | sal->end = start_sal.end; |
| 3913 | |
| 3914 | /* Check if we are now inside an inlined function. If we can, |
| 3915 | use the call site of the function instead. */ |
| 3916 | b = block_for_pc_sect (sal->pc, sal->section); |
| 3917 | function_block = NULL; |
| 3918 | while (b != NULL) |
| 3919 | { |
| 3920 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 3921 | function_block = b; |
| 3922 | else if (BLOCK_FUNCTION (b) != NULL) |
| 3923 | break; |
| 3924 | b = BLOCK_SUPERBLOCK (b); |
| 3925 | } |
| 3926 | if (function_block != NULL |
| 3927 | && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0) |
| 3928 | { |
| 3929 | sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block)); |
| 3930 | sal->symtab = symbol_symtab (BLOCK_FUNCTION (function_block)); |
| 3931 | } |
| 3932 | } |
| 3933 | |
| 3934 | /* Given PC at the function's start address, attempt to find the |
| 3935 | prologue end using SAL information. Return zero if the skip fails. |
| 3936 | |
| 3937 | A non-optimized prologue traditionally has one SAL for the function |
| 3938 | and a second for the function body. A single line function has |
| 3939 | them both pointing at the same line. |
| 3940 | |
| 3941 | An optimized prologue is similar but the prologue may contain |
| 3942 | instructions (SALs) from the instruction body. Need to skip those |
| 3943 | while not getting into the function body. |
| 3944 | |
| 3945 | The functions end point and an increasing SAL line are used as |
| 3946 | indicators of the prologue's endpoint. |
| 3947 | |
| 3948 | This code is based on the function refine_prologue_limit |
| 3949 | (found in ia64). */ |
| 3950 | |
| 3951 | CORE_ADDR |
| 3952 | skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr) |
| 3953 | { |
| 3954 | struct symtab_and_line prologue_sal; |
| 3955 | CORE_ADDR start_pc; |
| 3956 | CORE_ADDR end_pc; |
| 3957 | const struct block *bl; |
| 3958 | |
| 3959 | /* Get an initial range for the function. */ |
| 3960 | find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc); |
| 3961 | start_pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 3962 | |
| 3963 | prologue_sal = find_pc_line (start_pc, 0); |
| 3964 | if (prologue_sal.line != 0) |
| 3965 | { |
| 3966 | /* For languages other than assembly, treat two consecutive line |
| 3967 | entries at the same address as a zero-instruction prologue. |
| 3968 | The GNU assembler emits separate line notes for each instruction |
| 3969 | in a multi-instruction macro, but compilers generally will not |
| 3970 | do this. */ |
| 3971 | if (prologue_sal.symtab->language != language_asm) |
| 3972 | { |
| 3973 | struct linetable *linetable = SYMTAB_LINETABLE (prologue_sal.symtab); |
| 3974 | int idx = 0; |
| 3975 | |
| 3976 | /* Skip any earlier lines, and any end-of-sequence marker |
| 3977 | from a previous function. */ |
| 3978 | while (linetable->item[idx].pc != prologue_sal.pc |
| 3979 | || linetable->item[idx].line == 0) |
| 3980 | idx++; |
| 3981 | |
| 3982 | if (idx+1 < linetable->nitems |
| 3983 | && linetable->item[idx+1].line != 0 |
| 3984 | && linetable->item[idx+1].pc == start_pc) |
| 3985 | return start_pc; |
| 3986 | } |
| 3987 | |
| 3988 | /* If there is only one sal that covers the entire function, |
| 3989 | then it is probably a single line function, like |
| 3990 | "foo(){}". */ |
| 3991 | if (prologue_sal.end >= end_pc) |
| 3992 | return 0; |
| 3993 | |
| 3994 | while (prologue_sal.end < end_pc) |
| 3995 | { |
| 3996 | struct symtab_and_line sal; |
| 3997 | |
| 3998 | sal = find_pc_line (prologue_sal.end, 0); |
| 3999 | if (sal.line == 0) |
| 4000 | break; |
| 4001 | /* Assume that a consecutive SAL for the same (or larger) |
| 4002 | line mark the prologue -> body transition. */ |
| 4003 | if (sal.line >= prologue_sal.line) |
| 4004 | break; |
| 4005 | /* Likewise if we are in a different symtab altogether |
| 4006 | (e.g. within a file included via #include). */ |
| 4007 | if (sal.symtab != prologue_sal.symtab) |
| 4008 | break; |
| 4009 | |
| 4010 | /* The line number is smaller. Check that it's from the |
| 4011 | same function, not something inlined. If it's inlined, |
| 4012 | then there is no point comparing the line numbers. */ |
| 4013 | bl = block_for_pc (prologue_sal.end); |
| 4014 | while (bl) |
| 4015 | { |
| 4016 | if (block_inlined_p (bl)) |
| 4017 | break; |
| 4018 | if (BLOCK_FUNCTION (bl)) |
| 4019 | { |
| 4020 | bl = NULL; |
| 4021 | break; |
| 4022 | } |
| 4023 | bl = BLOCK_SUPERBLOCK (bl); |
| 4024 | } |
| 4025 | if (bl != NULL) |
| 4026 | break; |
| 4027 | |
| 4028 | /* The case in which compiler's optimizer/scheduler has |
| 4029 | moved instructions into the prologue. We look ahead in |
| 4030 | the function looking for address ranges whose |
| 4031 | corresponding line number is less the first one that we |
| 4032 | found for the function. This is more conservative then |
| 4033 | refine_prologue_limit which scans a large number of SALs |
| 4034 | looking for any in the prologue. */ |
| 4035 | prologue_sal = sal; |
| 4036 | } |
| 4037 | } |
| 4038 | |
| 4039 | if (prologue_sal.end < end_pc) |
| 4040 | /* Return the end of this line, or zero if we could not find a |
| 4041 | line. */ |
| 4042 | return prologue_sal.end; |
| 4043 | else |
| 4044 | /* Don't return END_PC, which is past the end of the function. */ |
| 4045 | return prologue_sal.pc; |
| 4046 | } |
| 4047 | |
| 4048 | /* See symtab.h. */ |
| 4049 | |
| 4050 | symbol * |
| 4051 | find_function_alias_target (bound_minimal_symbol msymbol) |
| 4052 | { |
| 4053 | CORE_ADDR func_addr; |
| 4054 | if (!msymbol_is_function (msymbol.objfile, msymbol.minsym, &func_addr)) |
| 4055 | return NULL; |
| 4056 | |
| 4057 | symbol *sym = find_pc_function (func_addr); |
| 4058 | if (sym != NULL |
| 4059 | && SYMBOL_CLASS (sym) == LOC_BLOCK |
| 4060 | && BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) == func_addr) |
| 4061 | return sym; |
| 4062 | |
| 4063 | return NULL; |
| 4064 | } |
| 4065 | |
| 4066 | \f |
| 4067 | /* If P is of the form "operator[ \t]+..." where `...' is |
| 4068 | some legitimate operator text, return a pointer to the |
| 4069 | beginning of the substring of the operator text. |
| 4070 | Otherwise, return "". */ |
| 4071 | |
| 4072 | static const char * |
| 4073 | operator_chars (const char *p, const char **end) |
| 4074 | { |
| 4075 | *end = ""; |
| 4076 | if (!startswith (p, CP_OPERATOR_STR)) |
| 4077 | return *end; |
| 4078 | p += CP_OPERATOR_LEN; |
| 4079 | |
| 4080 | /* Don't get faked out by `operator' being part of a longer |
| 4081 | identifier. */ |
| 4082 | if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0') |
| 4083 | return *end; |
| 4084 | |
| 4085 | /* Allow some whitespace between `operator' and the operator symbol. */ |
| 4086 | while (*p == ' ' || *p == '\t') |
| 4087 | p++; |
| 4088 | |
| 4089 | /* Recognize 'operator TYPENAME'. */ |
| 4090 | |
| 4091 | if (isalpha (*p) || *p == '_' || *p == '$') |
| 4092 | { |
| 4093 | const char *q = p + 1; |
| 4094 | |
| 4095 | while (isalnum (*q) || *q == '_' || *q == '$') |
| 4096 | q++; |
| 4097 | *end = q; |
| 4098 | return p; |
| 4099 | } |
| 4100 | |
| 4101 | while (*p) |
| 4102 | switch (*p) |
| 4103 | { |
| 4104 | case '\\': /* regexp quoting */ |
| 4105 | if (p[1] == '*') |
| 4106 | { |
| 4107 | if (p[2] == '=') /* 'operator\*=' */ |
| 4108 | *end = p + 3; |
| 4109 | else /* 'operator\*' */ |
| 4110 | *end = p + 2; |
| 4111 | return p; |
| 4112 | } |
| 4113 | else if (p[1] == '[') |
| 4114 | { |
| 4115 | if (p[2] == ']') |
| 4116 | error (_("mismatched quoting on brackets, " |
| 4117 | "try 'operator\\[\\]'")); |
| 4118 | else if (p[2] == '\\' && p[3] == ']') |
| 4119 | { |
| 4120 | *end = p + 4; /* 'operator\[\]' */ |
| 4121 | return p; |
| 4122 | } |
| 4123 | else |
| 4124 | error (_("nothing is allowed between '[' and ']'")); |
| 4125 | } |
| 4126 | else |
| 4127 | { |
| 4128 | /* Gratuitous quote: skip it and move on. */ |
| 4129 | p++; |
| 4130 | continue; |
| 4131 | } |
| 4132 | break; |
| 4133 | case '!': |
| 4134 | case '=': |
| 4135 | case '*': |
| 4136 | case '/': |
| 4137 | case '%': |
| 4138 | case '^': |
| 4139 | if (p[1] == '=') |
| 4140 | *end = p + 2; |
| 4141 | else |
| 4142 | *end = p + 1; |
| 4143 | return p; |
| 4144 | case '<': |
| 4145 | case '>': |
| 4146 | case '+': |
| 4147 | case '-': |
| 4148 | case '&': |
| 4149 | case '|': |
| 4150 | if (p[0] == '-' && p[1] == '>') |
| 4151 | { |
| 4152 | /* Struct pointer member operator 'operator->'. */ |
| 4153 | if (p[2] == '*') |
| 4154 | { |
| 4155 | *end = p + 3; /* 'operator->*' */ |
| 4156 | return p; |
| 4157 | } |
| 4158 | else if (p[2] == '\\') |
| 4159 | { |
| 4160 | *end = p + 4; /* Hopefully 'operator->\*' */ |
| 4161 | return p; |
| 4162 | } |
| 4163 | else |
| 4164 | { |
| 4165 | *end = p + 2; /* 'operator->' */ |
| 4166 | return p; |
| 4167 | } |
| 4168 | } |
| 4169 | if (p[1] == '=' || p[1] == p[0]) |
| 4170 | *end = p + 2; |
| 4171 | else |
| 4172 | *end = p + 1; |
| 4173 | return p; |
| 4174 | case '~': |
| 4175 | case ',': |
| 4176 | *end = p + 1; |
| 4177 | return p; |
| 4178 | case '(': |
| 4179 | if (p[1] != ')') |
| 4180 | error (_("`operator ()' must be specified " |
| 4181 | "without whitespace in `()'")); |
| 4182 | *end = p + 2; |
| 4183 | return p; |
| 4184 | case '?': |
| 4185 | if (p[1] != ':') |
| 4186 | error (_("`operator ?:' must be specified " |
| 4187 | "without whitespace in `?:'")); |
| 4188 | *end = p + 2; |
| 4189 | return p; |
| 4190 | case '[': |
| 4191 | if (p[1] != ']') |
| 4192 | error (_("`operator []' must be specified " |
| 4193 | "without whitespace in `[]'")); |
| 4194 | *end = p + 2; |
| 4195 | return p; |
| 4196 | default: |
| 4197 | error (_("`operator %s' not supported"), p); |
| 4198 | break; |
| 4199 | } |
| 4200 | |
| 4201 | *end = ""; |
| 4202 | return *end; |
| 4203 | } |
| 4204 | \f |
| 4205 | |
| 4206 | /* What part to match in a file name. */ |
| 4207 | |
| 4208 | struct filename_partial_match_opts |
| 4209 | { |
| 4210 | /* Only match the directory name part. */ |
| 4211 | bool dirname = false; |
| 4212 | |
| 4213 | /* Only match the basename part. */ |
| 4214 | bool basename = false; |
| 4215 | }; |
| 4216 | |
| 4217 | /* Data structure to maintain printing state for output_source_filename. */ |
| 4218 | |
| 4219 | struct output_source_filename_data |
| 4220 | { |
| 4221 | /* Output only filenames matching REGEXP. */ |
| 4222 | std::string regexp; |
| 4223 | gdb::optional<compiled_regex> c_regexp; |
| 4224 | /* Possibly only match a part of the filename. */ |
| 4225 | filename_partial_match_opts partial_match; |
| 4226 | |
| 4227 | |
| 4228 | /* Cache of what we've seen so far. */ |
| 4229 | struct filename_seen_cache *filename_seen_cache; |
| 4230 | |
| 4231 | /* Flag of whether we're printing the first one. */ |
| 4232 | int first; |
| 4233 | }; |
| 4234 | |
| 4235 | /* Slave routine for sources_info. Force line breaks at ,'s. |
| 4236 | NAME is the name to print. |
| 4237 | DATA contains the state for printing and watching for duplicates. */ |
| 4238 | |
| 4239 | static void |
| 4240 | output_source_filename (const char *name, |
| 4241 | struct output_source_filename_data *data) |
| 4242 | { |
| 4243 | /* Since a single source file can result in several partial symbol |
| 4244 | tables, we need to avoid printing it more than once. Note: if |
| 4245 | some of the psymtabs are read in and some are not, it gets |
| 4246 | printed both under "Source files for which symbols have been |
| 4247 | read" and "Source files for which symbols will be read in on |
| 4248 | demand". I consider this a reasonable way to deal with the |
| 4249 | situation. I'm not sure whether this can also happen for |
| 4250 | symtabs; it doesn't hurt to check. */ |
| 4251 | |
| 4252 | /* Was NAME already seen? */ |
| 4253 | if (data->filename_seen_cache->seen (name)) |
| 4254 | { |
| 4255 | /* Yes; don't print it again. */ |
| 4256 | return; |
| 4257 | } |
| 4258 | |
| 4259 | /* Does it match data->regexp? */ |
| 4260 | if (data->c_regexp.has_value ()) |
| 4261 | { |
| 4262 | const char *to_match; |
| 4263 | std::string dirname; |
| 4264 | |
| 4265 | if (data->partial_match.dirname) |
| 4266 | { |
| 4267 | dirname = ldirname (name); |
| 4268 | to_match = dirname.c_str (); |
| 4269 | } |
| 4270 | else if (data->partial_match.basename) |
| 4271 | to_match = lbasename (name); |
| 4272 | else |
| 4273 | to_match = name; |
| 4274 | |
| 4275 | if (data->c_regexp->exec (to_match, 0, NULL, 0) != 0) |
| 4276 | return; |
| 4277 | } |
| 4278 | |
| 4279 | /* Print it and reset *FIRST. */ |
| 4280 | if (! data->first) |
| 4281 | printf_filtered (", "); |
| 4282 | data->first = 0; |
| 4283 | |
| 4284 | wrap_here (""); |
| 4285 | fputs_styled (name, file_name_style.style (), gdb_stdout); |
| 4286 | } |
| 4287 | |
| 4288 | /* A callback for map_partial_symbol_filenames. */ |
| 4289 | |
| 4290 | static void |
| 4291 | output_partial_symbol_filename (const char *filename, const char *fullname, |
| 4292 | void *data) |
| 4293 | { |
| 4294 | output_source_filename (fullname ? fullname : filename, |
| 4295 | (struct output_source_filename_data *) data); |
| 4296 | } |
| 4297 | |
| 4298 | using isrc_flag_option_def |
| 4299 | = gdb::option::flag_option_def<filename_partial_match_opts>; |
| 4300 | |
| 4301 | static const gdb::option::option_def info_sources_option_defs[] = { |
| 4302 | |
| 4303 | isrc_flag_option_def { |
| 4304 | "dirname", |
| 4305 | [] (filename_partial_match_opts *opts) { return &opts->dirname; }, |
| 4306 | N_("Show only the files having a dirname matching REGEXP."), |
| 4307 | }, |
| 4308 | |
| 4309 | isrc_flag_option_def { |
| 4310 | "basename", |
| 4311 | [] (filename_partial_match_opts *opts) { return &opts->basename; }, |
| 4312 | N_("Show only the files having a basename matching REGEXP."), |
| 4313 | }, |
| 4314 | |
| 4315 | }; |
| 4316 | |
| 4317 | /* Create an option_def_group for the "info sources" options, with |
| 4318 | ISRC_OPTS as context. */ |
| 4319 | |
| 4320 | static inline gdb::option::option_def_group |
| 4321 | make_info_sources_options_def_group (filename_partial_match_opts *isrc_opts) |
| 4322 | { |
| 4323 | return {{info_sources_option_defs}, isrc_opts}; |
| 4324 | } |
| 4325 | |
| 4326 | /* Prints the header message for the source files that will be printed |
| 4327 | with the matching info present in DATA. SYMBOL_MSG is a message |
| 4328 | that tells what will or has been done with the symbols of the |
| 4329 | matching source files. */ |
| 4330 | |
| 4331 | static void |
| 4332 | print_info_sources_header (const char *symbol_msg, |
| 4333 | const struct output_source_filename_data *data) |
| 4334 | { |
| 4335 | puts_filtered (symbol_msg); |
| 4336 | if (!data->regexp.empty ()) |
| 4337 | { |
| 4338 | if (data->partial_match.dirname) |
| 4339 | printf_filtered (_("(dirname matching regular expression \"%s\")"), |
| 4340 | data->regexp.c_str ()); |
| 4341 | else if (data->partial_match.basename) |
| 4342 | printf_filtered (_("(basename matching regular expression \"%s\")"), |
| 4343 | data->regexp.c_str ()); |
| 4344 | else |
| 4345 | printf_filtered (_("(filename matching regular expression \"%s\")"), |
| 4346 | data->regexp.c_str ()); |
| 4347 | } |
| 4348 | puts_filtered ("\n"); |
| 4349 | } |
| 4350 | |
| 4351 | /* Completer for "info sources". */ |
| 4352 | |
| 4353 | static void |
| 4354 | info_sources_command_completer (cmd_list_element *ignore, |
| 4355 | completion_tracker &tracker, |
| 4356 | const char *text, const char *word) |
| 4357 | { |
| 4358 | const auto group = make_info_sources_options_def_group (nullptr); |
| 4359 | if (gdb::option::complete_options |
| 4360 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 4361 | return; |
| 4362 | } |
| 4363 | |
| 4364 | static void |
| 4365 | info_sources_command (const char *args, int from_tty) |
| 4366 | { |
| 4367 | struct output_source_filename_data data; |
| 4368 | |
| 4369 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 4370 | { |
| 4371 | error (_("No symbol table is loaded. Use the \"file\" command.")); |
| 4372 | } |
| 4373 | |
| 4374 | filename_seen_cache filenames_seen; |
| 4375 | |
| 4376 | auto group = make_info_sources_options_def_group (&data.partial_match); |
| 4377 | |
| 4378 | gdb::option::process_options |
| 4379 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, group); |
| 4380 | |
| 4381 | if (args != NULL && *args != '\000') |
| 4382 | data.regexp = args; |
| 4383 | |
| 4384 | data.filename_seen_cache = &filenames_seen; |
| 4385 | data.first = 1; |
| 4386 | |
| 4387 | if (data.partial_match.dirname && data.partial_match.basename) |
| 4388 | error (_("You cannot give both -basename and -dirname to 'info sources'.")); |
| 4389 | if ((data.partial_match.dirname || data.partial_match.basename) |
| 4390 | && data.regexp.empty ()) |
| 4391 | error (_("Missing REGEXP for 'info sources'.")); |
| 4392 | |
| 4393 | if (data.regexp.empty ()) |
| 4394 | data.c_regexp.reset (); |
| 4395 | else |
| 4396 | { |
| 4397 | int cflags = REG_NOSUB; |
| 4398 | #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM |
| 4399 | cflags |= REG_ICASE; |
| 4400 | #endif |
| 4401 | data.c_regexp.emplace (data.regexp.c_str (), cflags, |
| 4402 | _("Invalid regexp")); |
| 4403 | } |
| 4404 | |
| 4405 | print_info_sources_header |
| 4406 | (_("Source files for which symbols have been read in:\n"), &data); |
| 4407 | |
| 4408 | for (objfile *objfile : current_program_space->objfiles ()) |
| 4409 | { |
| 4410 | for (compunit_symtab *cu : objfile->compunits ()) |
| 4411 | { |
| 4412 | for (symtab *s : compunit_filetabs (cu)) |
| 4413 | { |
| 4414 | const char *fullname = symtab_to_fullname (s); |
| 4415 | |
| 4416 | output_source_filename (fullname, &data); |
| 4417 | } |
| 4418 | } |
| 4419 | } |
| 4420 | printf_filtered ("\n\n"); |
| 4421 | |
| 4422 | print_info_sources_header |
| 4423 | (_("Source files for which symbols will be read in on demand:\n"), &data); |
| 4424 | |
| 4425 | filenames_seen.clear (); |
| 4426 | data.first = 1; |
| 4427 | map_symbol_filenames (output_partial_symbol_filename, &data, |
| 4428 | 1 /*need_fullname*/); |
| 4429 | printf_filtered ("\n"); |
| 4430 | } |
| 4431 | |
| 4432 | /* Compare FILE against all the entries of FILENAMES. If BASENAMES is |
| 4433 | true compare only lbasename of FILENAMES. */ |
| 4434 | |
| 4435 | static bool |
| 4436 | file_matches (const char *file, const std::vector<const char *> &filenames, |
| 4437 | bool basenames) |
| 4438 | { |
| 4439 | if (filenames.empty ()) |
| 4440 | return true; |
| 4441 | |
| 4442 | for (const char *name : filenames) |
| 4443 | { |
| 4444 | name = (basenames ? lbasename (name) : name); |
| 4445 | if (compare_filenames_for_search (file, name)) |
| 4446 | return true; |
| 4447 | } |
| 4448 | |
| 4449 | return false; |
| 4450 | } |
| 4451 | |
| 4452 | /* Helper function for std::sort on symbol_search objects. Can only sort |
| 4453 | symbols, not minimal symbols. */ |
| 4454 | |
| 4455 | int |
| 4456 | symbol_search::compare_search_syms (const symbol_search &sym_a, |
| 4457 | const symbol_search &sym_b) |
| 4458 | { |
| 4459 | int c; |
| 4460 | |
| 4461 | c = FILENAME_CMP (symbol_symtab (sym_a.symbol)->filename, |
| 4462 | symbol_symtab (sym_b.symbol)->filename); |
| 4463 | if (c != 0) |
| 4464 | return c; |
| 4465 | |
| 4466 | if (sym_a.block != sym_b.block) |
| 4467 | return sym_a.block - sym_b.block; |
| 4468 | |
| 4469 | return strcmp (sym_a.symbol->print_name (), sym_b.symbol->print_name ()); |
| 4470 | } |
| 4471 | |
| 4472 | /* Returns true if the type_name of symbol_type of SYM matches TREG. |
| 4473 | If SYM has no symbol_type or symbol_name, returns false. */ |
| 4474 | |
| 4475 | bool |
| 4476 | treg_matches_sym_type_name (const compiled_regex &treg, |
| 4477 | const struct symbol *sym) |
| 4478 | { |
| 4479 | struct type *sym_type; |
| 4480 | std::string printed_sym_type_name; |
| 4481 | |
| 4482 | if (symbol_lookup_debug > 1) |
| 4483 | { |
| 4484 | fprintf_unfiltered (gdb_stdlog, |
| 4485 | "treg_matches_sym_type_name\n sym %s\n", |
| 4486 | sym->natural_name ()); |
| 4487 | } |
| 4488 | |
| 4489 | sym_type = SYMBOL_TYPE (sym); |
| 4490 | if (sym_type == NULL) |
| 4491 | return false; |
| 4492 | |
| 4493 | { |
| 4494 | scoped_switch_to_sym_language_if_auto l (sym); |
| 4495 | |
| 4496 | printed_sym_type_name = type_to_string (sym_type); |
| 4497 | } |
| 4498 | |
| 4499 | |
| 4500 | if (symbol_lookup_debug > 1) |
| 4501 | { |
| 4502 | fprintf_unfiltered (gdb_stdlog, |
| 4503 | " sym_type_name %s\n", |
| 4504 | printed_sym_type_name.c_str ()); |
| 4505 | } |
| 4506 | |
| 4507 | |
| 4508 | if (printed_sym_type_name.empty ()) |
| 4509 | return false; |
| 4510 | |
| 4511 | return treg.exec (printed_sym_type_name.c_str (), 0, NULL, 0) == 0; |
| 4512 | } |
| 4513 | |
| 4514 | /* See symtab.h. */ |
| 4515 | |
| 4516 | bool |
| 4517 | global_symbol_searcher::is_suitable_msymbol |
| 4518 | (const enum search_domain kind, const minimal_symbol *msymbol) |
| 4519 | { |
| 4520 | switch (MSYMBOL_TYPE (msymbol)) |
| 4521 | { |
| 4522 | case mst_data: |
| 4523 | case mst_bss: |
| 4524 | case mst_file_data: |
| 4525 | case mst_file_bss: |
| 4526 | return kind == VARIABLES_DOMAIN; |
| 4527 | case mst_text: |
| 4528 | case mst_file_text: |
| 4529 | case mst_solib_trampoline: |
| 4530 | case mst_text_gnu_ifunc: |
| 4531 | return kind == FUNCTIONS_DOMAIN; |
| 4532 | default: |
| 4533 | return false; |
| 4534 | } |
| 4535 | } |
| 4536 | |
| 4537 | /* See symtab.h. */ |
| 4538 | |
| 4539 | bool |
| 4540 | global_symbol_searcher::expand_symtabs |
| 4541 | (objfile *objfile, const gdb::optional<compiled_regex> &preg) const |
| 4542 | { |
| 4543 | enum search_domain kind = m_kind; |
| 4544 | bool found_msymbol = false; |
| 4545 | |
| 4546 | if (objfile->sf) |
| 4547 | objfile->sf->qf->expand_symtabs_matching |
| 4548 | (objfile, |
| 4549 | [&] (const char *filename, bool basenames) |
| 4550 | { |
| 4551 | return file_matches (filename, filenames, basenames); |
| 4552 | }, |
| 4553 | &lookup_name_info::match_any (), |
| 4554 | [&] (const char *symname) |
| 4555 | { |
| 4556 | return (!preg.has_value () |
| 4557 | || preg->exec (symname, 0, NULL, 0) == 0); |
| 4558 | }, |
| 4559 | NULL, |
| 4560 | kind); |
| 4561 | |
| 4562 | /* Here, we search through the minimal symbol tables for functions and |
| 4563 | variables that match, and force their symbols to be read. This is in |
| 4564 | particular necessary for demangled variable names, which are no longer |
| 4565 | put into the partial symbol tables. The symbol will then be found |
| 4566 | during the scan of symtabs later. |
| 4567 | |
| 4568 | For functions, find_pc_symtab should succeed if we have debug info for |
| 4569 | the function, for variables we have to call |
| 4570 | lookup_symbol_in_objfile_from_linkage_name to determine if the |
| 4571 | variable has debug info. If the lookup fails, set found_msymbol so |
| 4572 | that we will rescan to print any matching symbols without debug info. |
| 4573 | We only search the objfile the msymbol came from, we no longer search |
| 4574 | all objfiles. In large programs (1000s of shared libs) searching all |
| 4575 | objfiles is not worth the pain. */ |
| 4576 | if (filenames.empty () |
| 4577 | && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN)) |
| 4578 | { |
| 4579 | for (minimal_symbol *msymbol : objfile->msymbols ()) |
| 4580 | { |
| 4581 | QUIT; |
| 4582 | |
| 4583 | if (msymbol->created_by_gdb) |
| 4584 | continue; |
| 4585 | |
| 4586 | if (is_suitable_msymbol (kind, msymbol)) |
| 4587 | { |
| 4588 | if (!preg.has_value () |
| 4589 | || preg->exec (msymbol->natural_name (), 0, |
| 4590 | NULL, 0) == 0) |
| 4591 | { |
| 4592 | /* An important side-effect of these lookup functions is |
| 4593 | to expand the symbol table if msymbol is found, later |
| 4594 | in the process we will add matching symbols or |
| 4595 | msymbols to the results list, and that requires that |
| 4596 | the symbols tables are expanded. */ |
| 4597 | if (kind == FUNCTIONS_DOMAIN |
| 4598 | ? (find_pc_compunit_symtab |
| 4599 | (MSYMBOL_VALUE_ADDRESS (objfile, msymbol)) |
| 4600 | == NULL) |
| 4601 | : (lookup_symbol_in_objfile_from_linkage_name |
| 4602 | (objfile, msymbol->linkage_name (), |
| 4603 | VAR_DOMAIN) |
| 4604 | .symbol == NULL)) |
| 4605 | found_msymbol = true; |
| 4606 | } |
| 4607 | } |
| 4608 | } |
| 4609 | } |
| 4610 | |
| 4611 | return found_msymbol; |
| 4612 | } |
| 4613 | |
| 4614 | /* See symtab.h. */ |
| 4615 | |
| 4616 | bool |
| 4617 | global_symbol_searcher::add_matching_symbols |
| 4618 | (objfile *objfile, |
| 4619 | const gdb::optional<compiled_regex> &preg, |
| 4620 | const gdb::optional<compiled_regex> &treg, |
| 4621 | std::set<symbol_search> *result_set) const |
| 4622 | { |
| 4623 | enum search_domain kind = m_kind; |
| 4624 | |
| 4625 | /* Add matching symbols (if not already present). */ |
| 4626 | for (compunit_symtab *cust : objfile->compunits ()) |
| 4627 | { |
| 4628 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (cust); |
| 4629 | |
| 4630 | for (block_enum block : { GLOBAL_BLOCK, STATIC_BLOCK }) |
| 4631 | { |
| 4632 | struct block_iterator iter; |
| 4633 | struct symbol *sym; |
| 4634 | const struct block *b = BLOCKVECTOR_BLOCK (bv, block); |
| 4635 | |
| 4636 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4637 | { |
| 4638 | struct symtab *real_symtab = symbol_symtab (sym); |
| 4639 | |
| 4640 | QUIT; |
| 4641 | |
| 4642 | /* Check first sole REAL_SYMTAB->FILENAME. It does |
| 4643 | not need to be a substring of symtab_to_fullname as |
| 4644 | it may contain "./" etc. */ |
| 4645 | if ((file_matches (real_symtab->filename, filenames, false) |
| 4646 | || ((basenames_may_differ |
| 4647 | || file_matches (lbasename (real_symtab->filename), |
| 4648 | filenames, true)) |
| 4649 | && file_matches (symtab_to_fullname (real_symtab), |
| 4650 | filenames, false))) |
| 4651 | && ((!preg.has_value () |
| 4652 | || preg->exec (sym->natural_name (), 0, |
| 4653 | NULL, 0) == 0) |
| 4654 | && ((kind == VARIABLES_DOMAIN |
| 4655 | && SYMBOL_CLASS (sym) != LOC_TYPEDEF |
| 4656 | && SYMBOL_CLASS (sym) != LOC_UNRESOLVED |
| 4657 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
| 4658 | /* LOC_CONST can be used for more than |
| 4659 | just enums, e.g., c++ static const |
| 4660 | members. We only want to skip enums |
| 4661 | here. */ |
| 4662 | && !(SYMBOL_CLASS (sym) == LOC_CONST |
| 4663 | && (TYPE_CODE (SYMBOL_TYPE (sym)) |
| 4664 | == TYPE_CODE_ENUM)) |
| 4665 | && (!treg.has_value () |
| 4666 | || treg_matches_sym_type_name (*treg, sym))) |
| 4667 | || (kind == FUNCTIONS_DOMAIN |
| 4668 | && SYMBOL_CLASS (sym) == LOC_BLOCK |
| 4669 | && (!treg.has_value () |
| 4670 | || treg_matches_sym_type_name (*treg, |
| 4671 | sym))) |
| 4672 | || (kind == TYPES_DOMAIN |
| 4673 | && SYMBOL_CLASS (sym) == LOC_TYPEDEF |
| 4674 | && SYMBOL_DOMAIN (sym) != MODULE_DOMAIN) |
| 4675 | || (kind == MODULES_DOMAIN |
| 4676 | && SYMBOL_DOMAIN (sym) == MODULE_DOMAIN |
| 4677 | && SYMBOL_LINE (sym) != 0)))) |
| 4678 | { |
| 4679 | if (result_set->size () < m_max_search_results) |
| 4680 | { |
| 4681 | /* Match, insert if not already in the results. */ |
| 4682 | symbol_search ss (block, sym); |
| 4683 | if (result_set->find (ss) == result_set->end ()) |
| 4684 | result_set->insert (ss); |
| 4685 | } |
| 4686 | else |
| 4687 | return false; |
| 4688 | } |
| 4689 | } |
| 4690 | } |
| 4691 | } |
| 4692 | |
| 4693 | return true; |
| 4694 | } |
| 4695 | |
| 4696 | /* See symtab.h. */ |
| 4697 | |
| 4698 | bool |
| 4699 | global_symbol_searcher::add_matching_msymbols |
| 4700 | (objfile *objfile, const gdb::optional<compiled_regex> &preg, |
| 4701 | std::vector<symbol_search> *results) const |
| 4702 | { |
| 4703 | enum search_domain kind = m_kind; |
| 4704 | |
| 4705 | for (minimal_symbol *msymbol : objfile->msymbols ()) |
| 4706 | { |
| 4707 | QUIT; |
| 4708 | |
| 4709 | if (msymbol->created_by_gdb) |
| 4710 | continue; |
| 4711 | |
| 4712 | if (is_suitable_msymbol (kind, msymbol)) |
| 4713 | { |
| 4714 | if (!preg.has_value () |
| 4715 | || preg->exec (msymbol->natural_name (), 0, |
| 4716 | NULL, 0) == 0) |
| 4717 | { |
| 4718 | /* For functions we can do a quick check of whether the |
| 4719 | symbol might be found via find_pc_symtab. */ |
| 4720 | if (kind != FUNCTIONS_DOMAIN |
| 4721 | || (find_pc_compunit_symtab |
| 4722 | (MSYMBOL_VALUE_ADDRESS (objfile, msymbol)) |
| 4723 | == NULL)) |
| 4724 | { |
| 4725 | if (lookup_symbol_in_objfile_from_linkage_name |
| 4726 | (objfile, msymbol->linkage_name (), |
| 4727 | VAR_DOMAIN).symbol == NULL) |
| 4728 | { |
| 4729 | /* Matching msymbol, add it to the results list. */ |
| 4730 | if (results->size () < m_max_search_results) |
| 4731 | results->emplace_back (GLOBAL_BLOCK, msymbol, objfile); |
| 4732 | else |
| 4733 | return false; |
| 4734 | } |
| 4735 | } |
| 4736 | } |
| 4737 | } |
| 4738 | } |
| 4739 | |
| 4740 | return true; |
| 4741 | } |
| 4742 | |
| 4743 | /* See symtab.h. */ |
| 4744 | |
| 4745 | std::vector<symbol_search> |
| 4746 | global_symbol_searcher::search () const |
| 4747 | { |
| 4748 | gdb::optional<compiled_regex> preg; |
| 4749 | gdb::optional<compiled_regex> treg; |
| 4750 | |
| 4751 | gdb_assert (m_kind != ALL_DOMAIN); |
| 4752 | |
| 4753 | if (m_symbol_name_regexp != NULL) |
| 4754 | { |
| 4755 | const char *symbol_name_regexp = m_symbol_name_regexp; |
| 4756 | |
| 4757 | /* Make sure spacing is right for C++ operators. |
| 4758 | This is just a courtesy to make the matching less sensitive |
| 4759 | to how many spaces the user leaves between 'operator' |
| 4760 | and <TYPENAME> or <OPERATOR>. */ |
| 4761 | const char *opend; |
| 4762 | const char *opname = operator_chars (symbol_name_regexp, &opend); |
| 4763 | |
| 4764 | if (*opname) |
| 4765 | { |
| 4766 | int fix = -1; /* -1 means ok; otherwise number of |
| 4767 | spaces needed. */ |
| 4768 | |
| 4769 | if (isalpha (*opname) || *opname == '_' || *opname == '$') |
| 4770 | { |
| 4771 | /* There should 1 space between 'operator' and 'TYPENAME'. */ |
| 4772 | if (opname[-1] != ' ' || opname[-2] == ' ') |
| 4773 | fix = 1; |
| 4774 | } |
| 4775 | else |
| 4776 | { |
| 4777 | /* There should 0 spaces between 'operator' and 'OPERATOR'. */ |
| 4778 | if (opname[-1] == ' ') |
| 4779 | fix = 0; |
| 4780 | } |
| 4781 | /* If wrong number of spaces, fix it. */ |
| 4782 | if (fix >= 0) |
| 4783 | { |
| 4784 | char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1); |
| 4785 | |
| 4786 | sprintf (tmp, "operator%.*s%s", fix, " ", opname); |
| 4787 | symbol_name_regexp = tmp; |
| 4788 | } |
| 4789 | } |
| 4790 | |
| 4791 | int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off |
| 4792 | ? REG_ICASE : 0); |
| 4793 | preg.emplace (symbol_name_regexp, cflags, |
| 4794 | _("Invalid regexp")); |
| 4795 | } |
| 4796 | |
| 4797 | if (m_symbol_type_regexp != NULL) |
| 4798 | { |
| 4799 | int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off |
| 4800 | ? REG_ICASE : 0); |
| 4801 | treg.emplace (m_symbol_type_regexp, cflags, |
| 4802 | _("Invalid regexp")); |
| 4803 | } |
| 4804 | |
| 4805 | bool found_msymbol = false; |
| 4806 | std::set<symbol_search> result_set; |
| 4807 | for (objfile *objfile : current_program_space->objfiles ()) |
| 4808 | { |
| 4809 | /* Expand symtabs within objfile that possibly contain matching |
| 4810 | symbols. */ |
| 4811 | found_msymbol |= expand_symtabs (objfile, preg); |
| 4812 | |
| 4813 | /* Find matching symbols within OBJFILE and add them in to the |
| 4814 | RESULT_SET set. Use a set here so that we can easily detect |
| 4815 | duplicates as we go, and can therefore track how many unique |
| 4816 | matches we have found so far. */ |
| 4817 | if (!add_matching_symbols (objfile, preg, treg, &result_set)) |
| 4818 | break; |
| 4819 | } |
| 4820 | |
| 4821 | /* Convert the result set into a sorted result list, as std::set is |
| 4822 | defined to be sorted then no explicit call to std::sort is needed. */ |
| 4823 | std::vector<symbol_search> result (result_set.begin (), result_set.end ()); |
| 4824 | |
| 4825 | /* If there are no debug symbols, then add matching minsyms. But if the |
| 4826 | user wants to see symbols matching a type regexp, then never give a |
| 4827 | minimal symbol, as we assume that a minimal symbol does not have a |
| 4828 | type. */ |
| 4829 | if ((found_msymbol || (filenames.empty () && m_kind == VARIABLES_DOMAIN)) |
| 4830 | && !m_exclude_minsyms |
| 4831 | && !treg.has_value ()) |
| 4832 | { |
| 4833 | gdb_assert (m_kind == VARIABLES_DOMAIN || m_kind == FUNCTIONS_DOMAIN); |
| 4834 | for (objfile *objfile : current_program_space->objfiles ()) |
| 4835 | if (!add_matching_msymbols (objfile, preg, &result)) |
| 4836 | break; |
| 4837 | } |
| 4838 | |
| 4839 | return result; |
| 4840 | } |
| 4841 | |
| 4842 | /* See symtab.h. */ |
| 4843 | |
| 4844 | std::string |
| 4845 | symbol_to_info_string (struct symbol *sym, int block, |
| 4846 | enum search_domain kind) |
| 4847 | { |
| 4848 | std::string str; |
| 4849 | |
| 4850 | gdb_assert (block == GLOBAL_BLOCK || block == STATIC_BLOCK); |
| 4851 | |
| 4852 | if (kind != TYPES_DOMAIN && block == STATIC_BLOCK) |
| 4853 | str += "static "; |
| 4854 | |
| 4855 | /* Typedef that is not a C++ class. */ |
| 4856 | if (kind == TYPES_DOMAIN |
| 4857 | && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN) |
| 4858 | { |
| 4859 | string_file tmp_stream; |
| 4860 | |
| 4861 | /* FIXME: For C (and C++) we end up with a difference in output here |
| 4862 | between how a typedef is printed, and non-typedefs are printed. |
| 4863 | The TYPEDEF_PRINT code places a ";" at the end in an attempt to |
| 4864 | appear C-like, while TYPE_PRINT doesn't. |
| 4865 | |
| 4866 | For the struct printing case below, things are worse, we force |
| 4867 | printing of the ";" in this function, which is going to be wrong |
| 4868 | for languages that don't require a ";" between statements. */ |
| 4869 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_TYPEDEF) |
| 4870 | typedef_print (SYMBOL_TYPE (sym), sym, &tmp_stream); |
| 4871 | else |
| 4872 | type_print (SYMBOL_TYPE (sym), "", &tmp_stream, -1); |
| 4873 | str += tmp_stream.string (); |
| 4874 | } |
| 4875 | /* variable, func, or typedef-that-is-c++-class. */ |
| 4876 | else if (kind < TYPES_DOMAIN |
| 4877 | || (kind == TYPES_DOMAIN |
| 4878 | && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN)) |
| 4879 | { |
| 4880 | string_file tmp_stream; |
| 4881 | |
| 4882 | type_print (SYMBOL_TYPE (sym), |
| 4883 | (SYMBOL_CLASS (sym) == LOC_TYPEDEF |
| 4884 | ? "" : sym->print_name ()), |
| 4885 | &tmp_stream, 0); |
| 4886 | |
| 4887 | str += tmp_stream.string (); |
| 4888 | str += ";"; |
| 4889 | } |
| 4890 | /* Printing of modules is currently done here, maybe at some future |
| 4891 | point we might want a language specific method to print the module |
| 4892 | symbol so that we can customise the output more. */ |
| 4893 | else if (kind == MODULES_DOMAIN) |
| 4894 | str += sym->print_name (); |
| 4895 | |
| 4896 | return str; |
| 4897 | } |
| 4898 | |
| 4899 | /* Helper function for symbol info commands, for example 'info functions', |
| 4900 | 'info variables', etc. KIND is the kind of symbol we searched for, and |
| 4901 | BLOCK is the type of block the symbols was found in, either GLOBAL_BLOCK |
| 4902 | or STATIC_BLOCK. SYM is the symbol we found. If LAST is not NULL, |
| 4903 | print file and line number information for the symbol as well. Skip |
| 4904 | printing the filename if it matches LAST. */ |
| 4905 | |
| 4906 | static void |
| 4907 | print_symbol_info (enum search_domain kind, |
| 4908 | struct symbol *sym, |
| 4909 | int block, const char *last) |
| 4910 | { |
| 4911 | scoped_switch_to_sym_language_if_auto l (sym); |
| 4912 | struct symtab *s = symbol_symtab (sym); |
| 4913 | |
| 4914 | if (last != NULL) |
| 4915 | { |
| 4916 | const char *s_filename = symtab_to_filename_for_display (s); |
| 4917 | |
| 4918 | if (filename_cmp (last, s_filename) != 0) |
| 4919 | { |
| 4920 | printf_filtered (_("\nFile %ps:\n"), |
| 4921 | styled_string (file_name_style.style (), |
| 4922 | s_filename)); |
| 4923 | } |
| 4924 | |
| 4925 | if (SYMBOL_LINE (sym) != 0) |
| 4926 | printf_filtered ("%d:\t", SYMBOL_LINE (sym)); |
| 4927 | else |
| 4928 | puts_filtered ("\t"); |
| 4929 | } |
| 4930 | |
| 4931 | std::string str = symbol_to_info_string (sym, block, kind); |
| 4932 | printf_filtered ("%s\n", str.c_str ()); |
| 4933 | } |
| 4934 | |
| 4935 | /* This help function for symtab_symbol_info() prints information |
| 4936 | for non-debugging symbols to gdb_stdout. */ |
| 4937 | |
| 4938 | static void |
| 4939 | print_msymbol_info (struct bound_minimal_symbol msymbol) |
| 4940 | { |
| 4941 | struct gdbarch *gdbarch = msymbol.objfile->arch (); |
| 4942 | char *tmp; |
| 4943 | |
| 4944 | if (gdbarch_addr_bit (gdbarch) <= 32) |
| 4945 | tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol) |
| 4946 | & (CORE_ADDR) 0xffffffff, |
| 4947 | 8); |
| 4948 | else |
| 4949 | tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol), |
| 4950 | 16); |
| 4951 | |
| 4952 | ui_file_style sym_style = (msymbol.minsym->text_p () |
| 4953 | ? function_name_style.style () |
| 4954 | : ui_file_style ()); |
| 4955 | |
| 4956 | printf_filtered (_("%ps %ps\n"), |
| 4957 | styled_string (address_style.style (), tmp), |
| 4958 | styled_string (sym_style, msymbol.minsym->print_name ())); |
| 4959 | } |
| 4960 | |
| 4961 | /* This is the guts of the commands "info functions", "info types", and |
| 4962 | "info variables". It calls search_symbols to find all matches and then |
| 4963 | print_[m]symbol_info to print out some useful information about the |
| 4964 | matches. */ |
| 4965 | |
| 4966 | static void |
| 4967 | symtab_symbol_info (bool quiet, bool exclude_minsyms, |
| 4968 | const char *regexp, enum search_domain kind, |
| 4969 | const char *t_regexp, int from_tty) |
| 4970 | { |
| 4971 | static const char * const classnames[] = |
| 4972 | {"variable", "function", "type", "module"}; |
| 4973 | const char *last_filename = ""; |
| 4974 | int first = 1; |
| 4975 | |
| 4976 | gdb_assert (kind != ALL_DOMAIN); |
| 4977 | |
| 4978 | if (regexp != nullptr && *regexp == '\0') |
| 4979 | regexp = nullptr; |
| 4980 | |
| 4981 | global_symbol_searcher spec (kind, regexp); |
| 4982 | spec.set_symbol_type_regexp (t_regexp); |
| 4983 | spec.set_exclude_minsyms (exclude_minsyms); |
| 4984 | std::vector<symbol_search> symbols = spec.search (); |
| 4985 | |
| 4986 | if (!quiet) |
| 4987 | { |
| 4988 | if (regexp != NULL) |
| 4989 | { |
| 4990 | if (t_regexp != NULL) |
| 4991 | printf_filtered |
| 4992 | (_("All %ss matching regular expression \"%s\"" |
| 4993 | " with type matching regular expression \"%s\":\n"), |
| 4994 | classnames[kind], regexp, t_regexp); |
| 4995 | else |
| 4996 | printf_filtered (_("All %ss matching regular expression \"%s\":\n"), |
| 4997 | classnames[kind], regexp); |
| 4998 | } |
| 4999 | else |
| 5000 | { |
| 5001 | if (t_regexp != NULL) |
| 5002 | printf_filtered |
| 5003 | (_("All defined %ss" |
| 5004 | " with type matching regular expression \"%s\" :\n"), |
| 5005 | classnames[kind], t_regexp); |
| 5006 | else |
| 5007 | printf_filtered (_("All defined %ss:\n"), classnames[kind]); |
| 5008 | } |
| 5009 | } |
| 5010 | |
| 5011 | for (const symbol_search &p : symbols) |
| 5012 | { |
| 5013 | QUIT; |
| 5014 | |
| 5015 | if (p.msymbol.minsym != NULL) |
| 5016 | { |
| 5017 | if (first) |
| 5018 | { |
| 5019 | if (!quiet) |
| 5020 | printf_filtered (_("\nNon-debugging symbols:\n")); |
| 5021 | first = 0; |
| 5022 | } |
| 5023 | print_msymbol_info (p.msymbol); |
| 5024 | } |
| 5025 | else |
| 5026 | { |
| 5027 | print_symbol_info (kind, |
| 5028 | p.symbol, |
| 5029 | p.block, |
| 5030 | last_filename); |
| 5031 | last_filename |
| 5032 | = symtab_to_filename_for_display (symbol_symtab (p.symbol)); |
| 5033 | } |
| 5034 | } |
| 5035 | } |
| 5036 | |
| 5037 | /* Structure to hold the values of the options used by the 'info variables' |
| 5038 | and 'info functions' commands. These correspond to the -q, -t, and -n |
| 5039 | options. */ |
| 5040 | |
| 5041 | struct info_vars_funcs_options |
| 5042 | { |
| 5043 | bool quiet = false; |
| 5044 | bool exclude_minsyms = false; |
| 5045 | char *type_regexp = nullptr; |
| 5046 | |
| 5047 | ~info_vars_funcs_options () |
| 5048 | { |
| 5049 | xfree (type_regexp); |
| 5050 | } |
| 5051 | }; |
| 5052 | |
| 5053 | /* The options used by the 'info variables' and 'info functions' |
| 5054 | commands. */ |
| 5055 | |
| 5056 | static const gdb::option::option_def info_vars_funcs_options_defs[] = { |
| 5057 | gdb::option::boolean_option_def<info_vars_funcs_options> { |
| 5058 | "q", |
| 5059 | [] (info_vars_funcs_options *opt) { return &opt->quiet; }, |
| 5060 | nullptr, /* show_cmd_cb */ |
| 5061 | nullptr /* set_doc */ |
| 5062 | }, |
| 5063 | |
| 5064 | gdb::option::boolean_option_def<info_vars_funcs_options> { |
| 5065 | "n", |
| 5066 | [] (info_vars_funcs_options *opt) { return &opt->exclude_minsyms; }, |
| 5067 | nullptr, /* show_cmd_cb */ |
| 5068 | nullptr /* set_doc */ |
| 5069 | }, |
| 5070 | |
| 5071 | gdb::option::string_option_def<info_vars_funcs_options> { |
| 5072 | "t", |
| 5073 | [] (info_vars_funcs_options *opt) { return &opt->type_regexp; |
| 5074 | }, |
| 5075 | nullptr, /* show_cmd_cb */ |
| 5076 | nullptr /* set_doc */ |
| 5077 | } |
| 5078 | }; |
| 5079 | |
| 5080 | /* Returns the option group used by 'info variables' and 'info |
| 5081 | functions'. */ |
| 5082 | |
| 5083 | static gdb::option::option_def_group |
| 5084 | make_info_vars_funcs_options_def_group (info_vars_funcs_options *opts) |
| 5085 | { |
| 5086 | return {{info_vars_funcs_options_defs}, opts}; |
| 5087 | } |
| 5088 | |
| 5089 | /* Command completer for 'info variables' and 'info functions'. */ |
| 5090 | |
| 5091 | static void |
| 5092 | info_vars_funcs_command_completer (struct cmd_list_element *ignore, |
| 5093 | completion_tracker &tracker, |
| 5094 | const char *text, const char * /* word */) |
| 5095 | { |
| 5096 | const auto group |
| 5097 | = make_info_vars_funcs_options_def_group (nullptr); |
| 5098 | if (gdb::option::complete_options |
| 5099 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 5100 | return; |
| 5101 | |
| 5102 | const char *word = advance_to_expression_complete_word_point (tracker, text); |
| 5103 | symbol_completer (ignore, tracker, text, word); |
| 5104 | } |
| 5105 | |
| 5106 | /* Implement the 'info variables' command. */ |
| 5107 | |
| 5108 | static void |
| 5109 | info_variables_command (const char *args, int from_tty) |
| 5110 | { |
| 5111 | info_vars_funcs_options opts; |
| 5112 | auto grp = make_info_vars_funcs_options_def_group (&opts); |
| 5113 | gdb::option::process_options |
| 5114 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 5115 | if (args != nullptr && *args == '\0') |
| 5116 | args = nullptr; |
| 5117 | |
| 5118 | symtab_symbol_info (opts.quiet, opts.exclude_minsyms, args, VARIABLES_DOMAIN, |
| 5119 | opts.type_regexp, from_tty); |
| 5120 | } |
| 5121 | |
| 5122 | /* Implement the 'info functions' command. */ |
| 5123 | |
| 5124 | static void |
| 5125 | info_functions_command (const char *args, int from_tty) |
| 5126 | { |
| 5127 | info_vars_funcs_options opts; |
| 5128 | |
| 5129 | auto grp = make_info_vars_funcs_options_def_group (&opts); |
| 5130 | gdb::option::process_options |
| 5131 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 5132 | if (args != nullptr && *args == '\0') |
| 5133 | args = nullptr; |
| 5134 | |
| 5135 | symtab_symbol_info (opts.quiet, opts.exclude_minsyms, args, |
| 5136 | FUNCTIONS_DOMAIN, opts.type_regexp, from_tty); |
| 5137 | } |
| 5138 | |
| 5139 | /* Holds the -q option for the 'info types' command. */ |
| 5140 | |
| 5141 | struct info_types_options |
| 5142 | { |
| 5143 | bool quiet = false; |
| 5144 | }; |
| 5145 | |
| 5146 | /* The options used by the 'info types' command. */ |
| 5147 | |
| 5148 | static const gdb::option::option_def info_types_options_defs[] = { |
| 5149 | gdb::option::boolean_option_def<info_types_options> { |
| 5150 | "q", |
| 5151 | [] (info_types_options *opt) { return &opt->quiet; }, |
| 5152 | nullptr, /* show_cmd_cb */ |
| 5153 | nullptr /* set_doc */ |
| 5154 | } |
| 5155 | }; |
| 5156 | |
| 5157 | /* Returns the option group used by 'info types'. */ |
| 5158 | |
| 5159 | static gdb::option::option_def_group |
| 5160 | make_info_types_options_def_group (info_types_options *opts) |
| 5161 | { |
| 5162 | return {{info_types_options_defs}, opts}; |
| 5163 | } |
| 5164 | |
| 5165 | /* Implement the 'info types' command. */ |
| 5166 | |
| 5167 | static void |
| 5168 | info_types_command (const char *args, int from_tty) |
| 5169 | { |
| 5170 | info_types_options opts; |
| 5171 | |
| 5172 | auto grp = make_info_types_options_def_group (&opts); |
| 5173 | gdb::option::process_options |
| 5174 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 5175 | if (args != nullptr && *args == '\0') |
| 5176 | args = nullptr; |
| 5177 | symtab_symbol_info (opts.quiet, false, args, TYPES_DOMAIN, NULL, from_tty); |
| 5178 | } |
| 5179 | |
| 5180 | /* Command completer for 'info types' command. */ |
| 5181 | |
| 5182 | static void |
| 5183 | info_types_command_completer (struct cmd_list_element *ignore, |
| 5184 | completion_tracker &tracker, |
| 5185 | const char *text, const char * /* word */) |
| 5186 | { |
| 5187 | const auto group |
| 5188 | = make_info_types_options_def_group (nullptr); |
| 5189 | if (gdb::option::complete_options |
| 5190 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 5191 | return; |
| 5192 | |
| 5193 | const char *word = advance_to_expression_complete_word_point (tracker, text); |
| 5194 | symbol_completer (ignore, tracker, text, word); |
| 5195 | } |
| 5196 | |
| 5197 | /* Implement the 'info modules' command. */ |
| 5198 | |
| 5199 | static void |
| 5200 | info_modules_command (const char *args, int from_tty) |
| 5201 | { |
| 5202 | info_types_options opts; |
| 5203 | |
| 5204 | auto grp = make_info_types_options_def_group (&opts); |
| 5205 | gdb::option::process_options |
| 5206 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 5207 | if (args != nullptr && *args == '\0') |
| 5208 | args = nullptr; |
| 5209 | symtab_symbol_info (opts.quiet, true, args, MODULES_DOMAIN, NULL, |
| 5210 | from_tty); |
| 5211 | } |
| 5212 | |
| 5213 | static void |
| 5214 | rbreak_command (const char *regexp, int from_tty) |
| 5215 | { |
| 5216 | std::string string; |
| 5217 | const char *file_name = nullptr; |
| 5218 | |
| 5219 | if (regexp != nullptr) |
| 5220 | { |
| 5221 | const char *colon = strchr (regexp, ':'); |
| 5222 | |
| 5223 | if (colon && *(colon + 1) != ':') |
| 5224 | { |
| 5225 | int colon_index; |
| 5226 | char *local_name; |
| 5227 | |
| 5228 | colon_index = colon - regexp; |
| 5229 | local_name = (char *) alloca (colon_index + 1); |
| 5230 | memcpy (local_name, regexp, colon_index); |
| 5231 | local_name[colon_index--] = 0; |
| 5232 | while (isspace (local_name[colon_index])) |
| 5233 | local_name[colon_index--] = 0; |
| 5234 | file_name = local_name; |
| 5235 | regexp = skip_spaces (colon + 1); |
| 5236 | } |
| 5237 | } |
| 5238 | |
| 5239 | global_symbol_searcher spec (FUNCTIONS_DOMAIN, regexp); |
| 5240 | if (file_name != nullptr) |
| 5241 | spec.filenames.push_back (file_name); |
| 5242 | std::vector<symbol_search> symbols = spec.search (); |
| 5243 | |
| 5244 | scoped_rbreak_breakpoints finalize; |
| 5245 | for (const symbol_search &p : symbols) |
| 5246 | { |
| 5247 | if (p.msymbol.minsym == NULL) |
| 5248 | { |
| 5249 | struct symtab *symtab = symbol_symtab (p.symbol); |
| 5250 | const char *fullname = symtab_to_fullname (symtab); |
| 5251 | |
| 5252 | string = string_printf ("%s:'%s'", fullname, |
| 5253 | p.symbol->linkage_name ()); |
| 5254 | break_command (&string[0], from_tty); |
| 5255 | print_symbol_info (FUNCTIONS_DOMAIN, p.symbol, p.block, NULL); |
| 5256 | } |
| 5257 | else |
| 5258 | { |
| 5259 | string = string_printf ("'%s'", |
| 5260 | p.msymbol.minsym->linkage_name ()); |
| 5261 | |
| 5262 | break_command (&string[0], from_tty); |
| 5263 | printf_filtered ("<function, no debug info> %s;\n", |
| 5264 | p.msymbol.minsym->print_name ()); |
| 5265 | } |
| 5266 | } |
| 5267 | } |
| 5268 | \f |
| 5269 | |
| 5270 | /* Evaluate if SYMNAME matches LOOKUP_NAME. */ |
| 5271 | |
| 5272 | static int |
| 5273 | compare_symbol_name (const char *symbol_name, language symbol_language, |
| 5274 | const lookup_name_info &lookup_name, |
| 5275 | completion_match_result &match_res) |
| 5276 | { |
| 5277 | const language_defn *lang = language_def (symbol_language); |
| 5278 | |
| 5279 | symbol_name_matcher_ftype *name_match |
| 5280 | = get_symbol_name_matcher (lang, lookup_name); |
| 5281 | |
| 5282 | return name_match (symbol_name, lookup_name, &match_res); |
| 5283 | } |
| 5284 | |
| 5285 | /* See symtab.h. */ |
| 5286 | |
| 5287 | void |
| 5288 | completion_list_add_name (completion_tracker &tracker, |
| 5289 | language symbol_language, |
| 5290 | const char *symname, |
| 5291 | const lookup_name_info &lookup_name, |
| 5292 | const char *text, const char *word) |
| 5293 | { |
| 5294 | completion_match_result &match_res |
| 5295 | = tracker.reset_completion_match_result (); |
| 5296 | |
| 5297 | /* Clip symbols that cannot match. */ |
| 5298 | if (!compare_symbol_name (symname, symbol_language, lookup_name, match_res)) |
| 5299 | return; |
| 5300 | |
| 5301 | /* Refresh SYMNAME from the match string. It's potentially |
| 5302 | different depending on language. (E.g., on Ada, the match may be |
| 5303 | the encoded symbol name wrapped in "<>"). */ |
| 5304 | symname = match_res.match.match (); |
| 5305 | gdb_assert (symname != NULL); |
| 5306 | |
| 5307 | /* We have a match for a completion, so add SYMNAME to the current list |
| 5308 | of matches. Note that the name is moved to freshly malloc'd space. */ |
| 5309 | |
| 5310 | { |
| 5311 | gdb::unique_xmalloc_ptr<char> completion |
| 5312 | = make_completion_match_str (symname, text, word); |
| 5313 | |
| 5314 | /* Here we pass the match-for-lcd object to add_completion. Some |
| 5315 | languages match the user text against substrings of symbol |
| 5316 | names in some cases. E.g., in C++, "b push_ba" completes to |
| 5317 | "std::vector::push_back", "std::string::push_back", etc., and |
| 5318 | in this case we want the completion lowest common denominator |
| 5319 | to be "push_back" instead of "std::". */ |
| 5320 | tracker.add_completion (std::move (completion), |
| 5321 | &match_res.match_for_lcd, text, word); |
| 5322 | } |
| 5323 | } |
| 5324 | |
| 5325 | /* completion_list_add_name wrapper for struct symbol. */ |
| 5326 | |
| 5327 | static void |
| 5328 | completion_list_add_symbol (completion_tracker &tracker, |
| 5329 | symbol *sym, |
| 5330 | const lookup_name_info &lookup_name, |
| 5331 | const char *text, const char *word) |
| 5332 | { |
| 5333 | completion_list_add_name (tracker, sym->language (), |
| 5334 | sym->natural_name (), |
| 5335 | lookup_name, text, word); |
| 5336 | |
| 5337 | /* C++ function symbols include the parameters within both the msymbol |
| 5338 | name and the symbol name. The problem is that the msymbol name will |
| 5339 | describe the parameters in the most basic way, with typedefs stripped |
| 5340 | out, while the symbol name will represent the types as they appear in |
| 5341 | the program. This means we will see duplicate entries in the |
| 5342 | completion tracker. The following converts the symbol name back to |
| 5343 | the msymbol name and removes the msymbol name from the completion |
| 5344 | tracker. */ |
| 5345 | if (sym->language () == language_cplus |
| 5346 | && SYMBOL_DOMAIN (sym) == VAR_DOMAIN |
| 5347 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 5348 | { |
| 5349 | /* The call to canonicalize returns the empty string if the input |
| 5350 | string is already in canonical form, thanks to this we don't |
| 5351 | remove the symbol we just added above. */ |
| 5352 | std::string str |
| 5353 | = cp_canonicalize_string_no_typedefs (sym->natural_name ()); |
| 5354 | if (!str.empty ()) |
| 5355 | tracker.remove_completion (str.c_str ()); |
| 5356 | } |
| 5357 | } |
| 5358 | |
| 5359 | /* completion_list_add_name wrapper for struct minimal_symbol. */ |
| 5360 | |
| 5361 | static void |
| 5362 | completion_list_add_msymbol (completion_tracker &tracker, |
| 5363 | minimal_symbol *sym, |
| 5364 | const lookup_name_info &lookup_name, |
| 5365 | const char *text, const char *word) |
| 5366 | { |
| 5367 | completion_list_add_name (tracker, sym->language (), |
| 5368 | sym->natural_name (), |
| 5369 | lookup_name, text, word); |
| 5370 | } |
| 5371 | |
| 5372 | |
| 5373 | /* ObjC: In case we are completing on a selector, look as the msymbol |
| 5374 | again and feed all the selectors into the mill. */ |
| 5375 | |
| 5376 | static void |
| 5377 | completion_list_objc_symbol (completion_tracker &tracker, |
| 5378 | struct minimal_symbol *msymbol, |
| 5379 | const lookup_name_info &lookup_name, |
| 5380 | const char *text, const char *word) |
| 5381 | { |
| 5382 | static char *tmp = NULL; |
| 5383 | static unsigned int tmplen = 0; |
| 5384 | |
| 5385 | const char *method, *category, *selector; |
| 5386 | char *tmp2 = NULL; |
| 5387 | |
| 5388 | method = msymbol->natural_name (); |
| 5389 | |
| 5390 | /* Is it a method? */ |
| 5391 | if ((method[0] != '-') && (method[0] != '+')) |
| 5392 | return; |
| 5393 | |
| 5394 | if (text[0] == '[') |
| 5395 | /* Complete on shortened method method. */ |
| 5396 | completion_list_add_name (tracker, language_objc, |
| 5397 | method + 1, |
| 5398 | lookup_name, |
| 5399 | text, word); |
| 5400 | |
| 5401 | while ((strlen (method) + 1) >= tmplen) |
| 5402 | { |
| 5403 | if (tmplen == 0) |
| 5404 | tmplen = 1024; |
| 5405 | else |
| 5406 | tmplen *= 2; |
| 5407 | tmp = (char *) xrealloc (tmp, tmplen); |
| 5408 | } |
| 5409 | selector = strchr (method, ' '); |
| 5410 | if (selector != NULL) |
| 5411 | selector++; |
| 5412 | |
| 5413 | category = strchr (method, '('); |
| 5414 | |
| 5415 | if ((category != NULL) && (selector != NULL)) |
| 5416 | { |
| 5417 | memcpy (tmp, method, (category - method)); |
| 5418 | tmp[category - method] = ' '; |
| 5419 | memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1); |
| 5420 | completion_list_add_name (tracker, language_objc, tmp, |
| 5421 | lookup_name, text, word); |
| 5422 | if (text[0] == '[') |
| 5423 | completion_list_add_name (tracker, language_objc, tmp + 1, |
| 5424 | lookup_name, text, word); |
| 5425 | } |
| 5426 | |
| 5427 | if (selector != NULL) |
| 5428 | { |
| 5429 | /* Complete on selector only. */ |
| 5430 | strcpy (tmp, selector); |
| 5431 | tmp2 = strchr (tmp, ']'); |
| 5432 | if (tmp2 != NULL) |
| 5433 | *tmp2 = '\0'; |
| 5434 | |
| 5435 | completion_list_add_name (tracker, language_objc, tmp, |
| 5436 | lookup_name, text, word); |
| 5437 | } |
| 5438 | } |
| 5439 | |
| 5440 | /* Break the non-quoted text based on the characters which are in |
| 5441 | symbols. FIXME: This should probably be language-specific. */ |
| 5442 | |
| 5443 | static const char * |
| 5444 | language_search_unquoted_string (const char *text, const char *p) |
| 5445 | { |
| 5446 | for (; p > text; --p) |
| 5447 | { |
| 5448 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0') |
| 5449 | continue; |
| 5450 | else |
| 5451 | { |
| 5452 | if ((current_language->la_language == language_objc)) |
| 5453 | { |
| 5454 | if (p[-1] == ':') /* Might be part of a method name. */ |
| 5455 | continue; |
| 5456 | else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+')) |
| 5457 | p -= 2; /* Beginning of a method name. */ |
| 5458 | else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')') |
| 5459 | { /* Might be part of a method name. */ |
| 5460 | const char *t = p; |
| 5461 | |
| 5462 | /* Seeing a ' ' or a '(' is not conclusive evidence |
| 5463 | that we are in the middle of a method name. However, |
| 5464 | finding "-[" or "+[" should be pretty un-ambiguous. |
| 5465 | Unfortunately we have to find it now to decide. */ |
| 5466 | |
| 5467 | while (t > text) |
| 5468 | if (isalnum (t[-1]) || t[-1] == '_' || |
| 5469 | t[-1] == ' ' || t[-1] == ':' || |
| 5470 | t[-1] == '(' || t[-1] == ')') |
| 5471 | --t; |
| 5472 | else |
| 5473 | break; |
| 5474 | |
| 5475 | if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+')) |
| 5476 | p = t - 2; /* Method name detected. */ |
| 5477 | /* Else we leave with p unchanged. */ |
| 5478 | } |
| 5479 | } |
| 5480 | break; |
| 5481 | } |
| 5482 | } |
| 5483 | return p; |
| 5484 | } |
| 5485 | |
| 5486 | static void |
| 5487 | completion_list_add_fields (completion_tracker &tracker, |
| 5488 | struct symbol *sym, |
| 5489 | const lookup_name_info &lookup_name, |
| 5490 | const char *text, const char *word) |
| 5491 | { |
| 5492 | if (SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 5493 | { |
| 5494 | struct type *t = SYMBOL_TYPE (sym); |
| 5495 | enum type_code c = TYPE_CODE (t); |
| 5496 | int j; |
| 5497 | |
| 5498 | if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT) |
| 5499 | for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++) |
| 5500 | if (TYPE_FIELD_NAME (t, j)) |
| 5501 | completion_list_add_name (tracker, sym->language (), |
| 5502 | TYPE_FIELD_NAME (t, j), |
| 5503 | lookup_name, text, word); |
| 5504 | } |
| 5505 | } |
| 5506 | |
| 5507 | /* See symtab.h. */ |
| 5508 | |
| 5509 | bool |
| 5510 | symbol_is_function_or_method (symbol *sym) |
| 5511 | { |
| 5512 | switch (TYPE_CODE (SYMBOL_TYPE (sym))) |
| 5513 | { |
| 5514 | case TYPE_CODE_FUNC: |
| 5515 | case TYPE_CODE_METHOD: |
| 5516 | return true; |
| 5517 | default: |
| 5518 | return false; |
| 5519 | } |
| 5520 | } |
| 5521 | |
| 5522 | /* See symtab.h. */ |
| 5523 | |
| 5524 | bool |
| 5525 | symbol_is_function_or_method (minimal_symbol *msymbol) |
| 5526 | { |
| 5527 | switch (MSYMBOL_TYPE (msymbol)) |
| 5528 | { |
| 5529 | case mst_text: |
| 5530 | case mst_text_gnu_ifunc: |
| 5531 | case mst_solib_trampoline: |
| 5532 | case mst_file_text: |
| 5533 | return true; |
| 5534 | default: |
| 5535 | return false; |
| 5536 | } |
| 5537 | } |
| 5538 | |
| 5539 | /* See symtab.h. */ |
| 5540 | |
| 5541 | bound_minimal_symbol |
| 5542 | find_gnu_ifunc (const symbol *sym) |
| 5543 | { |
| 5544 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) |
| 5545 | return {}; |
| 5546 | |
| 5547 | lookup_name_info lookup_name (sym->search_name (), |
| 5548 | symbol_name_match_type::SEARCH_NAME); |
| 5549 | struct objfile *objfile = symbol_objfile (sym); |
| 5550 | |
| 5551 | CORE_ADDR address = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)); |
| 5552 | minimal_symbol *ifunc = NULL; |
| 5553 | |
| 5554 | iterate_over_minimal_symbols (objfile, lookup_name, |
| 5555 | [&] (minimal_symbol *minsym) |
| 5556 | { |
| 5557 | if (MSYMBOL_TYPE (minsym) == mst_text_gnu_ifunc |
| 5558 | || MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc) |
| 5559 | { |
| 5560 | CORE_ADDR msym_addr = MSYMBOL_VALUE_ADDRESS (objfile, minsym); |
| 5561 | if (MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc) |
| 5562 | { |
| 5563 | struct gdbarch *gdbarch = objfile->arch (); |
| 5564 | msym_addr |
| 5565 | = gdbarch_convert_from_func_ptr_addr (gdbarch, |
| 5566 | msym_addr, |
| 5567 | current_top_target ()); |
| 5568 | } |
| 5569 | if (msym_addr == address) |
| 5570 | { |
| 5571 | ifunc = minsym; |
| 5572 | return true; |
| 5573 | } |
| 5574 | } |
| 5575 | return false; |
| 5576 | }); |
| 5577 | |
| 5578 | if (ifunc != NULL) |
| 5579 | return {ifunc, objfile}; |
| 5580 | return {}; |
| 5581 | } |
| 5582 | |
| 5583 | /* Add matching symbols from SYMTAB to the current completion list. */ |
| 5584 | |
| 5585 | static void |
| 5586 | add_symtab_completions (struct compunit_symtab *cust, |
| 5587 | completion_tracker &tracker, |
| 5588 | complete_symbol_mode mode, |
| 5589 | const lookup_name_info &lookup_name, |
| 5590 | const char *text, const char *word, |
| 5591 | enum type_code code) |
| 5592 | { |
| 5593 | struct symbol *sym; |
| 5594 | const struct block *b; |
| 5595 | struct block_iterator iter; |
| 5596 | int i; |
| 5597 | |
| 5598 | if (cust == NULL) |
| 5599 | return; |
| 5600 | |
| 5601 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
| 5602 | { |
| 5603 | QUIT; |
| 5604 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), i); |
| 5605 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 5606 | { |
| 5607 | if (completion_skip_symbol (mode, sym)) |
| 5608 | continue; |
| 5609 | |
| 5610 | if (code == TYPE_CODE_UNDEF |
| 5611 | || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN |
| 5612 | && TYPE_CODE (SYMBOL_TYPE (sym)) == code)) |
| 5613 | completion_list_add_symbol (tracker, sym, |
| 5614 | lookup_name, |
| 5615 | text, word); |
| 5616 | } |
| 5617 | } |
| 5618 | } |
| 5619 | |
| 5620 | void |
| 5621 | default_collect_symbol_completion_matches_break_on |
| 5622 | (completion_tracker &tracker, complete_symbol_mode mode, |
| 5623 | symbol_name_match_type name_match_type, |
| 5624 | const char *text, const char *word, |
| 5625 | const char *break_on, enum type_code code) |
| 5626 | { |
| 5627 | /* Problem: All of the symbols have to be copied because readline |
| 5628 | frees them. I'm not going to worry about this; hopefully there |
| 5629 | won't be that many. */ |
| 5630 | |
| 5631 | struct symbol *sym; |
| 5632 | const struct block *b; |
| 5633 | const struct block *surrounding_static_block, *surrounding_global_block; |
| 5634 | struct block_iterator iter; |
| 5635 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 5636 | const char *sym_text; |
| 5637 | |
| 5638 | /* Now look for the symbol we are supposed to complete on. */ |
| 5639 | if (mode == complete_symbol_mode::LINESPEC) |
| 5640 | sym_text = text; |
| 5641 | else |
| 5642 | { |
| 5643 | const char *p; |
| 5644 | char quote_found; |
| 5645 | const char *quote_pos = NULL; |
| 5646 | |
| 5647 | /* First see if this is a quoted string. */ |
| 5648 | quote_found = '\0'; |
| 5649 | for (p = text; *p != '\0'; ++p) |
| 5650 | { |
| 5651 | if (quote_found != '\0') |
| 5652 | { |
| 5653 | if (*p == quote_found) |
| 5654 | /* Found close quote. */ |
| 5655 | quote_found = '\0'; |
| 5656 | else if (*p == '\\' && p[1] == quote_found) |
| 5657 | /* A backslash followed by the quote character |
| 5658 | doesn't end the string. */ |
| 5659 | ++p; |
| 5660 | } |
| 5661 | else if (*p == '\'' || *p == '"') |
| 5662 | { |
| 5663 | quote_found = *p; |
| 5664 | quote_pos = p; |
| 5665 | } |
| 5666 | } |
| 5667 | if (quote_found == '\'') |
| 5668 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 5669 | sym_text = quote_pos + 1; |
| 5670 | else if (quote_found == '"') |
| 5671 | /* A double-quoted string is never a symbol, nor does it make sense |
| 5672 | to complete it any other way. */ |
| 5673 | { |
| 5674 | return; |
| 5675 | } |
| 5676 | else |
| 5677 | { |
| 5678 | /* It is not a quoted string. Break it based on the characters |
| 5679 | which are in symbols. */ |
| 5680 | while (p > text) |
| 5681 | { |
| 5682 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0' |
| 5683 | || p[-1] == ':' || strchr (break_on, p[-1]) != NULL) |
| 5684 | --p; |
| 5685 | else |
| 5686 | break; |
| 5687 | } |
| 5688 | sym_text = p; |
| 5689 | } |
| 5690 | } |
| 5691 | |
| 5692 | lookup_name_info lookup_name (sym_text, name_match_type, true); |
| 5693 | |
| 5694 | /* At this point scan through the misc symbol vectors and add each |
| 5695 | symbol you find to the list. Eventually we want to ignore |
| 5696 | anything that isn't a text symbol (everything else will be |
| 5697 | handled by the psymtab code below). */ |
| 5698 | |
| 5699 | if (code == TYPE_CODE_UNDEF) |
| 5700 | { |
| 5701 | for (objfile *objfile : current_program_space->objfiles ()) |
| 5702 | { |
| 5703 | for (minimal_symbol *msymbol : objfile->msymbols ()) |
| 5704 | { |
| 5705 | QUIT; |
| 5706 | |
| 5707 | if (completion_skip_symbol (mode, msymbol)) |
| 5708 | continue; |
| 5709 | |
| 5710 | completion_list_add_msymbol (tracker, msymbol, lookup_name, |
| 5711 | sym_text, word); |
| 5712 | |
| 5713 | completion_list_objc_symbol (tracker, msymbol, lookup_name, |
| 5714 | sym_text, word); |
| 5715 | } |
| 5716 | } |
| 5717 | } |
| 5718 | |
| 5719 | /* Add completions for all currently loaded symbol tables. */ |
| 5720 | for (objfile *objfile : current_program_space->objfiles ()) |
| 5721 | { |
| 5722 | for (compunit_symtab *cust : objfile->compunits ()) |
| 5723 | add_symtab_completions (cust, tracker, mode, lookup_name, |
| 5724 | sym_text, word, code); |
| 5725 | } |
| 5726 | |
| 5727 | /* Look through the partial symtabs for all symbols which begin by |
| 5728 | matching SYM_TEXT. Expand all CUs that you find to the list. */ |
| 5729 | expand_symtabs_matching (NULL, |
| 5730 | lookup_name, |
| 5731 | NULL, |
| 5732 | [&] (compunit_symtab *symtab) /* expansion notify */ |
| 5733 | { |
| 5734 | add_symtab_completions (symtab, |
| 5735 | tracker, mode, lookup_name, |
| 5736 | sym_text, word, code); |
| 5737 | }, |
| 5738 | ALL_DOMAIN); |
| 5739 | |
| 5740 | /* Search upwards from currently selected frame (so that we can |
| 5741 | complete on local vars). Also catch fields of types defined in |
| 5742 | this places which match our text string. Only complete on types |
| 5743 | visible from current context. */ |
| 5744 | |
| 5745 | b = get_selected_block (0); |
| 5746 | surrounding_static_block = block_static_block (b); |
| 5747 | surrounding_global_block = block_global_block (b); |
| 5748 | if (surrounding_static_block != NULL) |
| 5749 | while (b != surrounding_static_block) |
| 5750 | { |
| 5751 | QUIT; |
| 5752 | |
| 5753 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 5754 | { |
| 5755 | if (code == TYPE_CODE_UNDEF) |
| 5756 | { |
| 5757 | completion_list_add_symbol (tracker, sym, lookup_name, |
| 5758 | sym_text, word); |
| 5759 | completion_list_add_fields (tracker, sym, lookup_name, |
| 5760 | sym_text, word); |
| 5761 | } |
| 5762 | else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN |
| 5763 | && TYPE_CODE (SYMBOL_TYPE (sym)) == code) |
| 5764 | completion_list_add_symbol (tracker, sym, lookup_name, |
| 5765 | sym_text, word); |
| 5766 | } |
| 5767 | |
| 5768 | /* Stop when we encounter an enclosing function. Do not stop for |
| 5769 | non-inlined functions - the locals of the enclosing function |
| 5770 | are in scope for a nested function. */ |
| 5771 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 5772 | break; |
| 5773 | b = BLOCK_SUPERBLOCK (b); |
| 5774 | } |
| 5775 | |
| 5776 | /* Add fields from the file's types; symbols will be added below. */ |
| 5777 | |
| 5778 | if (code == TYPE_CODE_UNDEF) |
| 5779 | { |
| 5780 | if (surrounding_static_block != NULL) |
| 5781 | ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym) |
| 5782 | completion_list_add_fields (tracker, sym, lookup_name, |
| 5783 | sym_text, word); |
| 5784 | |
| 5785 | if (surrounding_global_block != NULL) |
| 5786 | ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym) |
| 5787 | completion_list_add_fields (tracker, sym, lookup_name, |
| 5788 | sym_text, word); |
| 5789 | } |
| 5790 | |
| 5791 | /* Skip macros if we are completing a struct tag -- arguable but |
| 5792 | usually what is expected. */ |
| 5793 | if (current_language->la_macro_expansion == macro_expansion_c |
| 5794 | && code == TYPE_CODE_UNDEF) |
| 5795 | { |
| 5796 | gdb::unique_xmalloc_ptr<struct macro_scope> scope; |
| 5797 | |
| 5798 | /* This adds a macro's name to the current completion list. */ |
| 5799 | auto add_macro_name = [&] (const char *macro_name, |
| 5800 | const macro_definition *, |
| 5801 | macro_source_file *, |
| 5802 | int) |
| 5803 | { |
| 5804 | completion_list_add_name (tracker, language_c, macro_name, |
| 5805 | lookup_name, sym_text, word); |
| 5806 | }; |
| 5807 | |
| 5808 | /* Add any macros visible in the default scope. Note that this |
| 5809 | may yield the occasional wrong result, because an expression |
| 5810 | might be evaluated in a scope other than the default. For |
| 5811 | example, if the user types "break file:line if <TAB>", the |
| 5812 | resulting expression will be evaluated at "file:line" -- but |
| 5813 | at there does not seem to be a way to detect this at |
| 5814 | completion time. */ |
| 5815 | scope = default_macro_scope (); |
| 5816 | if (scope) |
| 5817 | macro_for_each_in_scope (scope->file, scope->line, |
| 5818 | add_macro_name); |
| 5819 | |
| 5820 | /* User-defined macros are always visible. */ |
| 5821 | macro_for_each (macro_user_macros, add_macro_name); |
| 5822 | } |
| 5823 | } |
| 5824 | |
| 5825 | void |
| 5826 | default_collect_symbol_completion_matches (completion_tracker &tracker, |
| 5827 | complete_symbol_mode mode, |
| 5828 | symbol_name_match_type name_match_type, |
| 5829 | const char *text, const char *word, |
| 5830 | enum type_code code) |
| 5831 | { |
| 5832 | return default_collect_symbol_completion_matches_break_on (tracker, mode, |
| 5833 | name_match_type, |
| 5834 | text, word, "", |
| 5835 | code); |
| 5836 | } |
| 5837 | |
| 5838 | /* Collect all symbols (regardless of class) which begin by matching |
| 5839 | TEXT. */ |
| 5840 | |
| 5841 | void |
| 5842 | collect_symbol_completion_matches (completion_tracker &tracker, |
| 5843 | complete_symbol_mode mode, |
| 5844 | symbol_name_match_type name_match_type, |
| 5845 | const char *text, const char *word) |
| 5846 | { |
| 5847 | current_language->la_collect_symbol_completion_matches (tracker, mode, |
| 5848 | name_match_type, |
| 5849 | text, word, |
| 5850 | TYPE_CODE_UNDEF); |
| 5851 | } |
| 5852 | |
| 5853 | /* Like collect_symbol_completion_matches, but only collect |
| 5854 | STRUCT_DOMAIN symbols whose type code is CODE. */ |
| 5855 | |
| 5856 | void |
| 5857 | collect_symbol_completion_matches_type (completion_tracker &tracker, |
| 5858 | const char *text, const char *word, |
| 5859 | enum type_code code) |
| 5860 | { |
| 5861 | complete_symbol_mode mode = complete_symbol_mode::EXPRESSION; |
| 5862 | symbol_name_match_type name_match_type = symbol_name_match_type::EXPRESSION; |
| 5863 | |
| 5864 | gdb_assert (code == TYPE_CODE_UNION |
| 5865 | || code == TYPE_CODE_STRUCT |
| 5866 | || code == TYPE_CODE_ENUM); |
| 5867 | current_language->la_collect_symbol_completion_matches (tracker, mode, |
| 5868 | name_match_type, |
| 5869 | text, word, code); |
| 5870 | } |
| 5871 | |
| 5872 | /* Like collect_symbol_completion_matches, but collects a list of |
| 5873 | symbols defined in all source files named SRCFILE. */ |
| 5874 | |
| 5875 | void |
| 5876 | collect_file_symbol_completion_matches (completion_tracker &tracker, |
| 5877 | complete_symbol_mode mode, |
| 5878 | symbol_name_match_type name_match_type, |
| 5879 | const char *text, const char *word, |
| 5880 | const char *srcfile) |
| 5881 | { |
| 5882 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 5883 | const char *sym_text; |
| 5884 | |
| 5885 | /* Now look for the symbol we are supposed to complete on. |
| 5886 | FIXME: This should be language-specific. */ |
| 5887 | if (mode == complete_symbol_mode::LINESPEC) |
| 5888 | sym_text = text; |
| 5889 | else |
| 5890 | { |
| 5891 | const char *p; |
| 5892 | char quote_found; |
| 5893 | const char *quote_pos = NULL; |
| 5894 | |
| 5895 | /* First see if this is a quoted string. */ |
| 5896 | quote_found = '\0'; |
| 5897 | for (p = text; *p != '\0'; ++p) |
| 5898 | { |
| 5899 | if (quote_found != '\0') |
| 5900 | { |
| 5901 | if (*p == quote_found) |
| 5902 | /* Found close quote. */ |
| 5903 | quote_found = '\0'; |
| 5904 | else if (*p == '\\' && p[1] == quote_found) |
| 5905 | /* A backslash followed by the quote character |
| 5906 | doesn't end the string. */ |
| 5907 | ++p; |
| 5908 | } |
| 5909 | else if (*p == '\'' || *p == '"') |
| 5910 | { |
| 5911 | quote_found = *p; |
| 5912 | quote_pos = p; |
| 5913 | } |
| 5914 | } |
| 5915 | if (quote_found == '\'') |
| 5916 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 5917 | sym_text = quote_pos + 1; |
| 5918 | else if (quote_found == '"') |
| 5919 | /* A double-quoted string is never a symbol, nor does it make sense |
| 5920 | to complete it any other way. */ |
| 5921 | { |
| 5922 | return; |
| 5923 | } |
| 5924 | else |
| 5925 | { |
| 5926 | /* Not a quoted string. */ |
| 5927 | sym_text = language_search_unquoted_string (text, p); |
| 5928 | } |
| 5929 | } |
| 5930 | |
| 5931 | lookup_name_info lookup_name (sym_text, name_match_type, true); |
| 5932 | |
| 5933 | /* Go through symtabs for SRCFILE and check the externs and statics |
| 5934 | for symbols which match. */ |
| 5935 | iterate_over_symtabs (srcfile, [&] (symtab *s) |
| 5936 | { |
| 5937 | add_symtab_completions (SYMTAB_COMPUNIT (s), |
| 5938 | tracker, mode, lookup_name, |
| 5939 | sym_text, word, TYPE_CODE_UNDEF); |
| 5940 | return false; |
| 5941 | }); |
| 5942 | } |
| 5943 | |
| 5944 | /* A helper function for make_source_files_completion_list. It adds |
| 5945 | another file name to a list of possible completions, growing the |
| 5946 | list as necessary. */ |
| 5947 | |
| 5948 | static void |
| 5949 | add_filename_to_list (const char *fname, const char *text, const char *word, |
| 5950 | completion_list *list) |
| 5951 | { |
| 5952 | list->emplace_back (make_completion_match_str (fname, text, word)); |
| 5953 | } |
| 5954 | |
| 5955 | static int |
| 5956 | not_interesting_fname (const char *fname) |
| 5957 | { |
| 5958 | static const char *illegal_aliens[] = { |
| 5959 | "_globals_", /* inserted by coff_symtab_read */ |
| 5960 | NULL |
| 5961 | }; |
| 5962 | int i; |
| 5963 | |
| 5964 | for (i = 0; illegal_aliens[i]; i++) |
| 5965 | { |
| 5966 | if (filename_cmp (fname, illegal_aliens[i]) == 0) |
| 5967 | return 1; |
| 5968 | } |
| 5969 | return 0; |
| 5970 | } |
| 5971 | |
| 5972 | /* An object of this type is passed as the user_data argument to |
| 5973 | map_partial_symbol_filenames. */ |
| 5974 | struct add_partial_filename_data |
| 5975 | { |
| 5976 | struct filename_seen_cache *filename_seen_cache; |
| 5977 | const char *text; |
| 5978 | const char *word; |
| 5979 | int text_len; |
| 5980 | completion_list *list; |
| 5981 | }; |
| 5982 | |
| 5983 | /* A callback for map_partial_symbol_filenames. */ |
| 5984 | |
| 5985 | static void |
| 5986 | maybe_add_partial_symtab_filename (const char *filename, const char *fullname, |
| 5987 | void *user_data) |
| 5988 | { |
| 5989 | struct add_partial_filename_data *data |
| 5990 | = (struct add_partial_filename_data *) user_data; |
| 5991 | |
| 5992 | if (not_interesting_fname (filename)) |
| 5993 | return; |
| 5994 | if (!data->filename_seen_cache->seen (filename) |
| 5995 | && filename_ncmp (filename, data->text, data->text_len) == 0) |
| 5996 | { |
| 5997 | /* This file matches for a completion; add it to the |
| 5998 | current list of matches. */ |
| 5999 | add_filename_to_list (filename, data->text, data->word, data->list); |
| 6000 | } |
| 6001 | else |
| 6002 | { |
| 6003 | const char *base_name = lbasename (filename); |
| 6004 | |
| 6005 | if (base_name != filename |
| 6006 | && !data->filename_seen_cache->seen (base_name) |
| 6007 | && filename_ncmp (base_name, data->text, data->text_len) == 0) |
| 6008 | add_filename_to_list (base_name, data->text, data->word, data->list); |
| 6009 | } |
| 6010 | } |
| 6011 | |
| 6012 | /* Return a list of all source files whose names begin with matching |
| 6013 | TEXT. The file names are looked up in the symbol tables of this |
| 6014 | program. */ |
| 6015 | |
| 6016 | completion_list |
| 6017 | make_source_files_completion_list (const char *text, const char *word) |
| 6018 | { |
| 6019 | size_t text_len = strlen (text); |
| 6020 | completion_list list; |
| 6021 | const char *base_name; |
| 6022 | struct add_partial_filename_data datum; |
| 6023 | |
| 6024 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 6025 | return list; |
| 6026 | |
| 6027 | filename_seen_cache filenames_seen; |
| 6028 | |
| 6029 | for (objfile *objfile : current_program_space->objfiles ()) |
| 6030 | { |
| 6031 | for (compunit_symtab *cu : objfile->compunits ()) |
| 6032 | { |
| 6033 | for (symtab *s : compunit_filetabs (cu)) |
| 6034 | { |
| 6035 | if (not_interesting_fname (s->filename)) |
| 6036 | continue; |
| 6037 | if (!filenames_seen.seen (s->filename) |
| 6038 | && filename_ncmp (s->filename, text, text_len) == 0) |
| 6039 | { |
| 6040 | /* This file matches for a completion; add it to the current |
| 6041 | list of matches. */ |
| 6042 | add_filename_to_list (s->filename, text, word, &list); |
| 6043 | } |
| 6044 | else |
| 6045 | { |
| 6046 | /* NOTE: We allow the user to type a base name when the |
| 6047 | debug info records leading directories, but not the other |
| 6048 | way around. This is what subroutines of breakpoint |
| 6049 | command do when they parse file names. */ |
| 6050 | base_name = lbasename (s->filename); |
| 6051 | if (base_name != s->filename |
| 6052 | && !filenames_seen.seen (base_name) |
| 6053 | && filename_ncmp (base_name, text, text_len) == 0) |
| 6054 | add_filename_to_list (base_name, text, word, &list); |
| 6055 | } |
| 6056 | } |
| 6057 | } |
| 6058 | } |
| 6059 | |
| 6060 | datum.filename_seen_cache = &filenames_seen; |
| 6061 | datum.text = text; |
| 6062 | datum.word = word; |
| 6063 | datum.text_len = text_len; |
| 6064 | datum.list = &list; |
| 6065 | map_symbol_filenames (maybe_add_partial_symtab_filename, &datum, |
| 6066 | 0 /*need_fullname*/); |
| 6067 | |
| 6068 | return list; |
| 6069 | } |
| 6070 | \f |
| 6071 | /* Track MAIN */ |
| 6072 | |
| 6073 | /* Return the "main_info" object for the current program space. If |
| 6074 | the object has not yet been created, create it and fill in some |
| 6075 | default values. */ |
| 6076 | |
| 6077 | static struct main_info * |
| 6078 | get_main_info (void) |
| 6079 | { |
| 6080 | struct main_info *info = main_progspace_key.get (current_program_space); |
| 6081 | |
| 6082 | if (info == NULL) |
| 6083 | { |
| 6084 | /* It may seem strange to store the main name in the progspace |
| 6085 | and also in whatever objfile happens to see a main name in |
| 6086 | its debug info. The reason for this is mainly historical: |
| 6087 | gdb returned "main" as the name even if no function named |
| 6088 | "main" was defined the program; and this approach lets us |
| 6089 | keep compatibility. */ |
| 6090 | info = main_progspace_key.emplace (current_program_space); |
| 6091 | } |
| 6092 | |
| 6093 | return info; |
| 6094 | } |
| 6095 | |
| 6096 | static void |
| 6097 | set_main_name (const char *name, enum language lang) |
| 6098 | { |
| 6099 | struct main_info *info = get_main_info (); |
| 6100 | |
| 6101 | if (info->name_of_main != NULL) |
| 6102 | { |
| 6103 | xfree (info->name_of_main); |
| 6104 | info->name_of_main = NULL; |
| 6105 | info->language_of_main = language_unknown; |
| 6106 | } |
| 6107 | if (name != NULL) |
| 6108 | { |
| 6109 | info->name_of_main = xstrdup (name); |
| 6110 | info->language_of_main = lang; |
| 6111 | } |
| 6112 | } |
| 6113 | |
| 6114 | /* Deduce the name of the main procedure, and set NAME_OF_MAIN |
| 6115 | accordingly. */ |
| 6116 | |
| 6117 | static void |
| 6118 | find_main_name (void) |
| 6119 | { |
| 6120 | const char *new_main_name; |
| 6121 | |
| 6122 | /* First check the objfiles to see whether a debuginfo reader has |
| 6123 | picked up the appropriate main name. Historically the main name |
| 6124 | was found in a more or less random way; this approach instead |
| 6125 | relies on the order of objfile creation -- which still isn't |
| 6126 | guaranteed to get the correct answer, but is just probably more |
| 6127 | accurate. */ |
| 6128 | for (objfile *objfile : current_program_space->objfiles ()) |
| 6129 | { |
| 6130 | if (objfile->per_bfd->name_of_main != NULL) |
| 6131 | { |
| 6132 | set_main_name (objfile->per_bfd->name_of_main, |
| 6133 | objfile->per_bfd->language_of_main); |
| 6134 | return; |
| 6135 | } |
| 6136 | } |
| 6137 | |
| 6138 | /* Try to see if the main procedure is in Ada. */ |
| 6139 | /* FIXME: brobecker/2005-03-07: Another way of doing this would |
| 6140 | be to add a new method in the language vector, and call this |
| 6141 | method for each language until one of them returns a non-empty |
| 6142 | name. This would allow us to remove this hard-coded call to |
| 6143 | an Ada function. It is not clear that this is a better approach |
| 6144 | at this point, because all methods need to be written in a way |
| 6145 | such that false positives never be returned. For instance, it is |
| 6146 | important that a method does not return a wrong name for the main |
| 6147 | procedure if the main procedure is actually written in a different |
| 6148 | language. It is easy to guaranty this with Ada, since we use a |
| 6149 | special symbol generated only when the main in Ada to find the name |
| 6150 | of the main procedure. It is difficult however to see how this can |
| 6151 | be guarantied for languages such as C, for instance. This suggests |
| 6152 | that order of call for these methods becomes important, which means |
| 6153 | a more complicated approach. */ |
| 6154 | new_main_name = ada_main_name (); |
| 6155 | if (new_main_name != NULL) |
| 6156 | { |
| 6157 | set_main_name (new_main_name, language_ada); |
| 6158 | return; |
| 6159 | } |
| 6160 | |
| 6161 | new_main_name = d_main_name (); |
| 6162 | if (new_main_name != NULL) |
| 6163 | { |
| 6164 | set_main_name (new_main_name, language_d); |
| 6165 | return; |
| 6166 | } |
| 6167 | |
| 6168 | new_main_name = go_main_name (); |
| 6169 | if (new_main_name != NULL) |
| 6170 | { |
| 6171 | set_main_name (new_main_name, language_go); |
| 6172 | return; |
| 6173 | } |
| 6174 | |
| 6175 | new_main_name = pascal_main_name (); |
| 6176 | if (new_main_name != NULL) |
| 6177 | { |
| 6178 | set_main_name (new_main_name, language_pascal); |
| 6179 | return; |
| 6180 | } |
| 6181 | |
| 6182 | /* The languages above didn't identify the name of the main procedure. |
| 6183 | Fallback to "main". */ |
| 6184 | |
| 6185 | /* Try to find language for main in psymtabs. */ |
| 6186 | enum language lang |
| 6187 | = find_quick_global_symbol_language ("main", VAR_DOMAIN); |
| 6188 | if (lang != language_unknown) |
| 6189 | { |
| 6190 | set_main_name ("main", lang); |
| 6191 | return; |
| 6192 | } |
| 6193 | |
| 6194 | set_main_name ("main", language_unknown); |
| 6195 | } |
| 6196 | |
| 6197 | /* See symtab.h. */ |
| 6198 | |
| 6199 | const char * |
| 6200 | main_name () |
| 6201 | { |
| 6202 | struct main_info *info = get_main_info (); |
| 6203 | |
| 6204 | if (info->name_of_main == NULL) |
| 6205 | find_main_name (); |
| 6206 | |
| 6207 | return info->name_of_main; |
| 6208 | } |
| 6209 | |
| 6210 | /* Return the language of the main function. If it is not known, |
| 6211 | return language_unknown. */ |
| 6212 | |
| 6213 | enum language |
| 6214 | main_language (void) |
| 6215 | { |
| 6216 | struct main_info *info = get_main_info (); |
| 6217 | |
| 6218 | if (info->name_of_main == NULL) |
| 6219 | find_main_name (); |
| 6220 | |
| 6221 | return info->language_of_main; |
| 6222 | } |
| 6223 | |
| 6224 | /* Handle ``executable_changed'' events for the symtab module. */ |
| 6225 | |
| 6226 | static void |
| 6227 | symtab_observer_executable_changed (void) |
| 6228 | { |
| 6229 | /* NAME_OF_MAIN may no longer be the same, so reset it for now. */ |
| 6230 | set_main_name (NULL, language_unknown); |
| 6231 | } |
| 6232 | |
| 6233 | /* Return 1 if the supplied producer string matches the ARM RealView |
| 6234 | compiler (armcc). */ |
| 6235 | |
| 6236 | bool |
| 6237 | producer_is_realview (const char *producer) |
| 6238 | { |
| 6239 | static const char *const arm_idents[] = { |
| 6240 | "ARM C Compiler, ADS", |
| 6241 | "Thumb C Compiler, ADS", |
| 6242 | "ARM C++ Compiler, ADS", |
| 6243 | "Thumb C++ Compiler, ADS", |
| 6244 | "ARM/Thumb C/C++ Compiler, RVCT", |
| 6245 | "ARM C/C++ Compiler, RVCT" |
| 6246 | }; |
| 6247 | int i; |
| 6248 | |
| 6249 | if (producer == NULL) |
| 6250 | return false; |
| 6251 | |
| 6252 | for (i = 0; i < ARRAY_SIZE (arm_idents); i++) |
| 6253 | if (startswith (producer, arm_idents[i])) |
| 6254 | return true; |
| 6255 | |
| 6256 | return false; |
| 6257 | } |
| 6258 | |
| 6259 | \f |
| 6260 | |
| 6261 | /* The next index to hand out in response to a registration request. */ |
| 6262 | |
| 6263 | static int next_aclass_value = LOC_FINAL_VALUE; |
| 6264 | |
| 6265 | /* The maximum number of "aclass" registrations we support. This is |
| 6266 | constant for convenience. */ |
| 6267 | #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10) |
| 6268 | |
| 6269 | /* The objects representing the various "aclass" values. The elements |
| 6270 | from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent |
| 6271 | elements are those registered at gdb initialization time. */ |
| 6272 | |
| 6273 | static struct symbol_impl symbol_impl[MAX_SYMBOL_IMPLS]; |
| 6274 | |
| 6275 | /* The globally visible pointer. This is separate from 'symbol_impl' |
| 6276 | so that it can be const. */ |
| 6277 | |
| 6278 | const struct symbol_impl *symbol_impls = &symbol_impl[0]; |
| 6279 | |
| 6280 | /* Make sure we saved enough room in struct symbol. */ |
| 6281 | |
| 6282 | gdb_static_assert (MAX_SYMBOL_IMPLS <= (1 << SYMBOL_ACLASS_BITS)); |
| 6283 | |
| 6284 | /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS |
| 6285 | is the ops vector associated with this index. This returns the new |
| 6286 | index, which should be used as the aclass_index field for symbols |
| 6287 | of this type. */ |
| 6288 | |
| 6289 | int |
| 6290 | register_symbol_computed_impl (enum address_class aclass, |
| 6291 | const struct symbol_computed_ops *ops) |
| 6292 | { |
| 6293 | int result = next_aclass_value++; |
| 6294 | |
| 6295 | gdb_assert (aclass == LOC_COMPUTED); |
| 6296 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 6297 | symbol_impl[result].aclass = aclass; |
| 6298 | symbol_impl[result].ops_computed = ops; |
| 6299 | |
| 6300 | /* Sanity check OPS. */ |
| 6301 | gdb_assert (ops != NULL); |
| 6302 | gdb_assert (ops->tracepoint_var_ref != NULL); |
| 6303 | gdb_assert (ops->describe_location != NULL); |
| 6304 | gdb_assert (ops->get_symbol_read_needs != NULL); |
| 6305 | gdb_assert (ops->read_variable != NULL); |
| 6306 | |
| 6307 | return result; |
| 6308 | } |
| 6309 | |
| 6310 | /* Register a function with frame base type. ACLASS must be LOC_BLOCK. |
| 6311 | OPS is the ops vector associated with this index. This returns the |
| 6312 | new index, which should be used as the aclass_index field for symbols |
| 6313 | of this type. */ |
| 6314 | |
| 6315 | int |
| 6316 | register_symbol_block_impl (enum address_class aclass, |
| 6317 | const struct symbol_block_ops *ops) |
| 6318 | { |
| 6319 | int result = next_aclass_value++; |
| 6320 | |
| 6321 | gdb_assert (aclass == LOC_BLOCK); |
| 6322 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 6323 | symbol_impl[result].aclass = aclass; |
| 6324 | symbol_impl[result].ops_block = ops; |
| 6325 | |
| 6326 | /* Sanity check OPS. */ |
| 6327 | gdb_assert (ops != NULL); |
| 6328 | gdb_assert (ops->find_frame_base_location != NULL); |
| 6329 | |
| 6330 | return result; |
| 6331 | } |
| 6332 | |
| 6333 | /* Register a register symbol type. ACLASS must be LOC_REGISTER or |
| 6334 | LOC_REGPARM_ADDR. OPS is the register ops vector associated with |
| 6335 | this index. This returns the new index, which should be used as |
| 6336 | the aclass_index field for symbols of this type. */ |
| 6337 | |
| 6338 | int |
| 6339 | register_symbol_register_impl (enum address_class aclass, |
| 6340 | const struct symbol_register_ops *ops) |
| 6341 | { |
| 6342 | int result = next_aclass_value++; |
| 6343 | |
| 6344 | gdb_assert (aclass == LOC_REGISTER || aclass == LOC_REGPARM_ADDR); |
| 6345 | gdb_assert (result < MAX_SYMBOL_IMPLS); |
| 6346 | symbol_impl[result].aclass = aclass; |
| 6347 | symbol_impl[result].ops_register = ops; |
| 6348 | |
| 6349 | return result; |
| 6350 | } |
| 6351 | |
| 6352 | /* Initialize elements of 'symbol_impl' for the constants in enum |
| 6353 | address_class. */ |
| 6354 | |
| 6355 | static void |
| 6356 | initialize_ordinary_address_classes (void) |
| 6357 | { |
| 6358 | int i; |
| 6359 | |
| 6360 | for (i = 0; i < LOC_FINAL_VALUE; ++i) |
| 6361 | symbol_impl[i].aclass = (enum address_class) i; |
| 6362 | } |
| 6363 | |
| 6364 | \f |
| 6365 | |
| 6366 | /* Initialize the symbol SYM, and mark it as being owned by an objfile. */ |
| 6367 | |
| 6368 | void |
| 6369 | initialize_objfile_symbol (struct symbol *sym) |
| 6370 | { |
| 6371 | SYMBOL_OBJFILE_OWNED (sym) = 1; |
| 6372 | SYMBOL_SECTION (sym) = -1; |
| 6373 | } |
| 6374 | |
| 6375 | /* Allocate and initialize a new 'struct symbol' on OBJFILE's |
| 6376 | obstack. */ |
| 6377 | |
| 6378 | struct symbol * |
| 6379 | allocate_symbol (struct objfile *objfile) |
| 6380 | { |
| 6381 | struct symbol *result = new (&objfile->objfile_obstack) symbol (); |
| 6382 | |
| 6383 | initialize_objfile_symbol (result); |
| 6384 | |
| 6385 | return result; |
| 6386 | } |
| 6387 | |
| 6388 | /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's |
| 6389 | obstack. */ |
| 6390 | |
| 6391 | struct template_symbol * |
| 6392 | allocate_template_symbol (struct objfile *objfile) |
| 6393 | { |
| 6394 | struct template_symbol *result; |
| 6395 | |
| 6396 | result = new (&objfile->objfile_obstack) template_symbol (); |
| 6397 | initialize_objfile_symbol (result); |
| 6398 | |
| 6399 | return result; |
| 6400 | } |
| 6401 | |
| 6402 | /* See symtab.h. */ |
| 6403 | |
| 6404 | struct objfile * |
| 6405 | symbol_objfile (const struct symbol *symbol) |
| 6406 | { |
| 6407 | gdb_assert (SYMBOL_OBJFILE_OWNED (symbol)); |
| 6408 | return SYMTAB_OBJFILE (symbol->owner.symtab); |
| 6409 | } |
| 6410 | |
| 6411 | /* See symtab.h. */ |
| 6412 | |
| 6413 | struct gdbarch * |
| 6414 | symbol_arch (const struct symbol *symbol) |
| 6415 | { |
| 6416 | if (!SYMBOL_OBJFILE_OWNED (symbol)) |
| 6417 | return symbol->owner.arch; |
| 6418 | return SYMTAB_OBJFILE (symbol->owner.symtab)->arch (); |
| 6419 | } |
| 6420 | |
| 6421 | /* See symtab.h. */ |
| 6422 | |
| 6423 | struct symtab * |
| 6424 | symbol_symtab (const struct symbol *symbol) |
| 6425 | { |
| 6426 | gdb_assert (SYMBOL_OBJFILE_OWNED (symbol)); |
| 6427 | return symbol->owner.symtab; |
| 6428 | } |
| 6429 | |
| 6430 | /* See symtab.h. */ |
| 6431 | |
| 6432 | void |
| 6433 | symbol_set_symtab (struct symbol *symbol, struct symtab *symtab) |
| 6434 | { |
| 6435 | gdb_assert (SYMBOL_OBJFILE_OWNED (symbol)); |
| 6436 | symbol->owner.symtab = symtab; |
| 6437 | } |
| 6438 | |
| 6439 | /* See symtab.h. */ |
| 6440 | |
| 6441 | CORE_ADDR |
| 6442 | get_symbol_address (const struct symbol *sym) |
| 6443 | { |
| 6444 | gdb_assert (sym->maybe_copied); |
| 6445 | gdb_assert (SYMBOL_CLASS (sym) == LOC_STATIC); |
| 6446 | |
| 6447 | const char *linkage_name = sym->linkage_name (); |
| 6448 | |
| 6449 | for (objfile *objfile : current_program_space->objfiles ()) |
| 6450 | { |
| 6451 | if (objfile->separate_debug_objfile_backlink != nullptr) |
| 6452 | continue; |
| 6453 | |
| 6454 | bound_minimal_symbol minsym |
| 6455 | = lookup_minimal_symbol_linkage (linkage_name, objfile); |
| 6456 | if (minsym.minsym != nullptr) |
| 6457 | return BMSYMBOL_VALUE_ADDRESS (minsym); |
| 6458 | } |
| 6459 | return sym->value.address; |
| 6460 | } |
| 6461 | |
| 6462 | /* See symtab.h. */ |
| 6463 | |
| 6464 | CORE_ADDR |
| 6465 | get_msymbol_address (struct objfile *objf, const struct minimal_symbol *minsym) |
| 6466 | { |
| 6467 | gdb_assert (minsym->maybe_copied); |
| 6468 | gdb_assert ((objf->flags & OBJF_MAINLINE) == 0); |
| 6469 | |
| 6470 | const char *linkage_name = minsym->linkage_name (); |
| 6471 | |
| 6472 | for (objfile *objfile : current_program_space->objfiles ()) |
| 6473 | { |
| 6474 | if (objfile->separate_debug_objfile_backlink == nullptr |
| 6475 | && (objfile->flags & OBJF_MAINLINE) != 0) |
| 6476 | { |
| 6477 | bound_minimal_symbol found |
| 6478 | = lookup_minimal_symbol_linkage (linkage_name, objfile); |
| 6479 | if (found.minsym != nullptr) |
| 6480 | return BMSYMBOL_VALUE_ADDRESS (found); |
| 6481 | } |
| 6482 | } |
| 6483 | return minsym->value.address + objf->section_offsets[minsym->section]; |
| 6484 | } |
| 6485 | |
| 6486 | \f |
| 6487 | |
| 6488 | /* Hold the sub-commands of 'info module'. */ |
| 6489 | |
| 6490 | static struct cmd_list_element *info_module_cmdlist = NULL; |
| 6491 | |
| 6492 | /* See symtab.h. */ |
| 6493 | |
| 6494 | std::vector<module_symbol_search> |
| 6495 | search_module_symbols (const char *module_regexp, const char *regexp, |
| 6496 | const char *type_regexp, search_domain kind) |
| 6497 | { |
| 6498 | std::vector<module_symbol_search> results; |
| 6499 | |
| 6500 | /* Search for all modules matching MODULE_REGEXP. */ |
| 6501 | global_symbol_searcher spec1 (MODULES_DOMAIN, module_regexp); |
| 6502 | spec1.set_exclude_minsyms (true); |
| 6503 | std::vector<symbol_search> modules = spec1.search (); |
| 6504 | |
| 6505 | /* Now search for all symbols of the required KIND matching the required |
| 6506 | regular expressions. We figure out which ones are in which modules |
| 6507 | below. */ |
| 6508 | global_symbol_searcher spec2 (kind, regexp); |
| 6509 | spec2.set_symbol_type_regexp (type_regexp); |
| 6510 | spec2.set_exclude_minsyms (true); |
| 6511 | std::vector<symbol_search> symbols = spec2.search (); |
| 6512 | |
| 6513 | /* Now iterate over all MODULES, checking to see which items from |
| 6514 | SYMBOLS are in each module. */ |
| 6515 | for (const symbol_search &p : modules) |
| 6516 | { |
| 6517 | QUIT; |
| 6518 | |
| 6519 | /* This is a module. */ |
| 6520 | gdb_assert (p.symbol != nullptr); |
| 6521 | |
| 6522 | std::string prefix = p.symbol->print_name (); |
| 6523 | prefix += "::"; |
| 6524 | |
| 6525 | for (const symbol_search &q : symbols) |
| 6526 | { |
| 6527 | if (q.symbol == nullptr) |
| 6528 | continue; |
| 6529 | |
| 6530 | if (strncmp (q.symbol->print_name (), prefix.c_str (), |
| 6531 | prefix.size ()) != 0) |
| 6532 | continue; |
| 6533 | |
| 6534 | results.push_back ({p, q}); |
| 6535 | } |
| 6536 | } |
| 6537 | |
| 6538 | return results; |
| 6539 | } |
| 6540 | |
| 6541 | /* Implement the core of both 'info module functions' and 'info module |
| 6542 | variables'. */ |
| 6543 | |
| 6544 | static void |
| 6545 | info_module_subcommand (bool quiet, const char *module_regexp, |
| 6546 | const char *regexp, const char *type_regexp, |
| 6547 | search_domain kind) |
| 6548 | { |
| 6549 | /* Print a header line. Don't build the header line bit by bit as this |
| 6550 | prevents internationalisation. */ |
| 6551 | if (!quiet) |
| 6552 | { |
| 6553 | if (module_regexp == nullptr) |
| 6554 | { |
| 6555 | if (type_regexp == nullptr) |
| 6556 | { |
| 6557 | if (regexp == nullptr) |
| 6558 | printf_filtered ((kind == VARIABLES_DOMAIN |
| 6559 | ? _("All variables in all modules:") |
| 6560 | : _("All functions in all modules:"))); |
| 6561 | else |
| 6562 | printf_filtered |
| 6563 | ((kind == VARIABLES_DOMAIN |
| 6564 | ? _("All variables matching regular expression" |
| 6565 | " \"%s\" in all modules:") |
| 6566 | : _("All functions matching regular expression" |
| 6567 | " \"%s\" in all modules:")), |
| 6568 | regexp); |
| 6569 | } |
| 6570 | else |
| 6571 | { |
| 6572 | if (regexp == nullptr) |
| 6573 | printf_filtered |
| 6574 | ((kind == VARIABLES_DOMAIN |
| 6575 | ? _("All variables with type matching regular " |
| 6576 | "expression \"%s\" in all modules:") |
| 6577 | : _("All functions with type matching regular " |
| 6578 | "expression \"%s\" in all modules:")), |
| 6579 | type_regexp); |
| 6580 | else |
| 6581 | printf_filtered |
| 6582 | ((kind == VARIABLES_DOMAIN |
| 6583 | ? _("All variables matching regular expression " |
| 6584 | "\"%s\",\n\twith type matching regular " |
| 6585 | "expression \"%s\" in all modules:") |
| 6586 | : _("All functions matching regular expression " |
| 6587 | "\"%s\",\n\twith type matching regular " |
| 6588 | "expression \"%s\" in all modules:")), |
| 6589 | regexp, type_regexp); |
| 6590 | } |
| 6591 | } |
| 6592 | else |
| 6593 | { |
| 6594 | if (type_regexp == nullptr) |
| 6595 | { |
| 6596 | if (regexp == nullptr) |
| 6597 | printf_filtered |
| 6598 | ((kind == VARIABLES_DOMAIN |
| 6599 | ? _("All variables in all modules matching regular " |
| 6600 | "expression \"%s\":") |
| 6601 | : _("All functions in all modules matching regular " |
| 6602 | "expression \"%s\":")), |
| 6603 | module_regexp); |
| 6604 | else |
| 6605 | printf_filtered |
| 6606 | ((kind == VARIABLES_DOMAIN |
| 6607 | ? _("All variables matching regular expression " |
| 6608 | "\"%s\",\n\tin all modules matching regular " |
| 6609 | "expression \"%s\":") |
| 6610 | : _("All functions matching regular expression " |
| 6611 | "\"%s\",\n\tin all modules matching regular " |
| 6612 | "expression \"%s\":")), |
| 6613 | regexp, module_regexp); |
| 6614 | } |
| 6615 | else |
| 6616 | { |
| 6617 | if (regexp == nullptr) |
| 6618 | printf_filtered |
| 6619 | ((kind == VARIABLES_DOMAIN |
| 6620 | ? _("All variables with type matching regular " |
| 6621 | "expression \"%s\"\n\tin all modules matching " |
| 6622 | "regular expression \"%s\":") |
| 6623 | : _("All functions with type matching regular " |
| 6624 | "expression \"%s\"\n\tin all modules matching " |
| 6625 | "regular expression \"%s\":")), |
| 6626 | type_regexp, module_regexp); |
| 6627 | else |
| 6628 | printf_filtered |
| 6629 | ((kind == VARIABLES_DOMAIN |
| 6630 | ? _("All variables matching regular expression " |
| 6631 | "\"%s\",\n\twith type matching regular expression " |
| 6632 | "\"%s\",\n\tin all modules matching regular " |
| 6633 | "expression \"%s\":") |
| 6634 | : _("All functions matching regular expression " |
| 6635 | "\"%s\",\n\twith type matching regular expression " |
| 6636 | "\"%s\",\n\tin all modules matching regular " |
| 6637 | "expression \"%s\":")), |
| 6638 | regexp, type_regexp, module_regexp); |
| 6639 | } |
| 6640 | } |
| 6641 | printf_filtered ("\n"); |
| 6642 | } |
| 6643 | |
| 6644 | /* Find all symbols of type KIND matching the given regular expressions |
| 6645 | along with the symbols for the modules in which those symbols |
| 6646 | reside. */ |
| 6647 | std::vector<module_symbol_search> module_symbols |
| 6648 | = search_module_symbols (module_regexp, regexp, type_regexp, kind); |
| 6649 | |
| 6650 | std::sort (module_symbols.begin (), module_symbols.end (), |
| 6651 | [] (const module_symbol_search &a, const module_symbol_search &b) |
| 6652 | { |
| 6653 | if (a.first < b.first) |
| 6654 | return true; |
| 6655 | else if (a.first == b.first) |
| 6656 | return a.second < b.second; |
| 6657 | else |
| 6658 | return false; |
| 6659 | }); |
| 6660 | |
| 6661 | const char *last_filename = ""; |
| 6662 | const symbol *last_module_symbol = nullptr; |
| 6663 | for (const module_symbol_search &ms : module_symbols) |
| 6664 | { |
| 6665 | const symbol_search &p = ms.first; |
| 6666 | const symbol_search &q = ms.second; |
| 6667 | |
| 6668 | gdb_assert (q.symbol != nullptr); |
| 6669 | |
| 6670 | if (last_module_symbol != p.symbol) |
| 6671 | { |
| 6672 | printf_filtered ("\n"); |
| 6673 | printf_filtered (_("Module \"%s\":\n"), p.symbol->print_name ()); |
| 6674 | last_module_symbol = p.symbol; |
| 6675 | last_filename = ""; |
| 6676 | } |
| 6677 | |
| 6678 | print_symbol_info (FUNCTIONS_DOMAIN, q.symbol, q.block, |
| 6679 | last_filename); |
| 6680 | last_filename |
| 6681 | = symtab_to_filename_for_display (symbol_symtab (q.symbol)); |
| 6682 | } |
| 6683 | } |
| 6684 | |
| 6685 | /* Hold the option values for the 'info module .....' sub-commands. */ |
| 6686 | |
| 6687 | struct info_modules_var_func_options |
| 6688 | { |
| 6689 | bool quiet = false; |
| 6690 | char *type_regexp = nullptr; |
| 6691 | char *module_regexp = nullptr; |
| 6692 | |
| 6693 | ~info_modules_var_func_options () |
| 6694 | { |
| 6695 | xfree (type_regexp); |
| 6696 | xfree (module_regexp); |
| 6697 | } |
| 6698 | }; |
| 6699 | |
| 6700 | /* The options used by 'info module variables' and 'info module functions' |
| 6701 | commands. */ |
| 6702 | |
| 6703 | static const gdb::option::option_def info_modules_var_func_options_defs [] = { |
| 6704 | gdb::option::boolean_option_def<info_modules_var_func_options> { |
| 6705 | "q", |
| 6706 | [] (info_modules_var_func_options *opt) { return &opt->quiet; }, |
| 6707 | nullptr, /* show_cmd_cb */ |
| 6708 | nullptr /* set_doc */ |
| 6709 | }, |
| 6710 | |
| 6711 | gdb::option::string_option_def<info_modules_var_func_options> { |
| 6712 | "t", |
| 6713 | [] (info_modules_var_func_options *opt) { return &opt->type_regexp; }, |
| 6714 | nullptr, /* show_cmd_cb */ |
| 6715 | nullptr /* set_doc */ |
| 6716 | }, |
| 6717 | |
| 6718 | gdb::option::string_option_def<info_modules_var_func_options> { |
| 6719 | "m", |
| 6720 | [] (info_modules_var_func_options *opt) { return &opt->module_regexp; }, |
| 6721 | nullptr, /* show_cmd_cb */ |
| 6722 | nullptr /* set_doc */ |
| 6723 | } |
| 6724 | }; |
| 6725 | |
| 6726 | /* Return the option group used by the 'info module ...' sub-commands. */ |
| 6727 | |
| 6728 | static inline gdb::option::option_def_group |
| 6729 | make_info_modules_var_func_options_def_group |
| 6730 | (info_modules_var_func_options *opts) |
| 6731 | { |
| 6732 | return {{info_modules_var_func_options_defs}, opts}; |
| 6733 | } |
| 6734 | |
| 6735 | /* Implements the 'info module functions' command. */ |
| 6736 | |
| 6737 | static void |
| 6738 | info_module_functions_command (const char *args, int from_tty) |
| 6739 | { |
| 6740 | info_modules_var_func_options opts; |
| 6741 | auto grp = make_info_modules_var_func_options_def_group (&opts); |
| 6742 | gdb::option::process_options |
| 6743 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 6744 | if (args != nullptr && *args == '\0') |
| 6745 | args = nullptr; |
| 6746 | |
| 6747 | info_module_subcommand (opts.quiet, opts.module_regexp, args, |
| 6748 | opts.type_regexp, FUNCTIONS_DOMAIN); |
| 6749 | } |
| 6750 | |
| 6751 | /* Implements the 'info module variables' command. */ |
| 6752 | |
| 6753 | static void |
| 6754 | info_module_variables_command (const char *args, int from_tty) |
| 6755 | { |
| 6756 | info_modules_var_func_options opts; |
| 6757 | auto grp = make_info_modules_var_func_options_def_group (&opts); |
| 6758 | gdb::option::process_options |
| 6759 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 6760 | if (args != nullptr && *args == '\0') |
| 6761 | args = nullptr; |
| 6762 | |
| 6763 | info_module_subcommand (opts.quiet, opts.module_regexp, args, |
| 6764 | opts.type_regexp, VARIABLES_DOMAIN); |
| 6765 | } |
| 6766 | |
| 6767 | /* Command completer for 'info module ...' sub-commands. */ |
| 6768 | |
| 6769 | static void |
| 6770 | info_module_var_func_command_completer (struct cmd_list_element *ignore, |
| 6771 | completion_tracker &tracker, |
| 6772 | const char *text, |
| 6773 | const char * /* word */) |
| 6774 | { |
| 6775 | |
| 6776 | const auto group = make_info_modules_var_func_options_def_group (nullptr); |
| 6777 | if (gdb::option::complete_options |
| 6778 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 6779 | return; |
| 6780 | |
| 6781 | const char *word = advance_to_expression_complete_word_point (tracker, text); |
| 6782 | symbol_completer (ignore, tracker, text, word); |
| 6783 | } |
| 6784 | |
| 6785 | \f |
| 6786 | |
| 6787 | void _initialize_symtab (); |
| 6788 | void |
| 6789 | _initialize_symtab () |
| 6790 | { |
| 6791 | cmd_list_element *c; |
| 6792 | |
| 6793 | initialize_ordinary_address_classes (); |
| 6794 | |
| 6795 | c = add_info ("variables", info_variables_command, |
| 6796 | info_print_args_help (_("\ |
| 6797 | All global and static variable names or those matching REGEXPs.\n\ |
| 6798 | Usage: info variables [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\ |
| 6799 | Prints the global and static variables.\n"), |
| 6800 | _("global and static variables"), |
| 6801 | true)); |
| 6802 | set_cmd_completer_handle_brkchars (c, info_vars_funcs_command_completer); |
| 6803 | if (dbx_commands) |
| 6804 | { |
| 6805 | c = add_com ("whereis", class_info, info_variables_command, |
| 6806 | info_print_args_help (_("\ |
| 6807 | All global and static variable names, or those matching REGEXPs.\n\ |
| 6808 | Usage: whereis [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\ |
| 6809 | Prints the global and static variables.\n"), |
| 6810 | _("global and static variables"), |
| 6811 | true)); |
| 6812 | set_cmd_completer_handle_brkchars (c, info_vars_funcs_command_completer); |
| 6813 | } |
| 6814 | |
| 6815 | c = add_info ("functions", info_functions_command, |
| 6816 | info_print_args_help (_("\ |
| 6817 | All function names or those matching REGEXPs.\n\ |
| 6818 | Usage: info functions [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\ |
| 6819 | Prints the functions.\n"), |
| 6820 | _("functions"), |
| 6821 | true)); |
| 6822 | set_cmd_completer_handle_brkchars (c, info_vars_funcs_command_completer); |
| 6823 | |
| 6824 | c = add_info ("types", info_types_command, _("\ |
| 6825 | All type names, or those matching REGEXP.\n\ |
| 6826 | Usage: info types [-q] [REGEXP]\n\ |
| 6827 | Print information about all types matching REGEXP, or all types if no\n\ |
| 6828 | REGEXP is given. The optional flag -q disables printing of headers.")); |
| 6829 | set_cmd_completer_handle_brkchars (c, info_types_command_completer); |
| 6830 | |
| 6831 | const auto info_sources_opts = make_info_sources_options_def_group (nullptr); |
| 6832 | |
| 6833 | static std::string info_sources_help |
| 6834 | = gdb::option::build_help (_("\ |
| 6835 | All source files in the program or those matching REGEXP.\n\ |
| 6836 | Usage: info sources [OPTION]... [REGEXP]\n\ |
| 6837 | By default, REGEXP is used to match anywhere in the filename.\n\ |
| 6838 | \n\ |
| 6839 | Options:\n\ |
| 6840 | %OPTIONS%"), |
| 6841 | info_sources_opts); |
| 6842 | |
| 6843 | c = add_info ("sources", info_sources_command, info_sources_help.c_str ()); |
| 6844 | set_cmd_completer_handle_brkchars (c, info_sources_command_completer); |
| 6845 | |
| 6846 | c = add_info ("modules", info_modules_command, |
| 6847 | _("All module names, or those matching REGEXP.")); |
| 6848 | set_cmd_completer_handle_brkchars (c, info_types_command_completer); |
| 6849 | |
| 6850 | add_basic_prefix_cmd ("module", class_info, _("\ |
| 6851 | Print information about modules."), |
| 6852 | &info_module_cmdlist, "info module ", |
| 6853 | 0, &infolist); |
| 6854 | |
| 6855 | c = add_cmd ("functions", class_info, info_module_functions_command, _("\ |
| 6856 | Display functions arranged by modules.\n\ |
| 6857 | Usage: info module functions [-q] [-m MODREGEXP] [-t TYPEREGEXP] [REGEXP]\n\ |
| 6858 | Print a summary of all functions within each Fortran module, grouped by\n\ |
| 6859 | module and file. For each function the line on which the function is\n\ |
| 6860 | defined is given along with the type signature and name of the function.\n\ |
| 6861 | \n\ |
| 6862 | If REGEXP is provided then only functions whose name matches REGEXP are\n\ |
| 6863 | listed. If MODREGEXP is provided then only functions in modules matching\n\ |
| 6864 | MODREGEXP are listed. If TYPEREGEXP is given then only functions whose\n\ |
| 6865 | type signature matches TYPEREGEXP are listed.\n\ |
| 6866 | \n\ |
| 6867 | The -q flag suppresses printing some header information."), |
| 6868 | &info_module_cmdlist); |
| 6869 | set_cmd_completer_handle_brkchars |
| 6870 | (c, info_module_var_func_command_completer); |
| 6871 | |
| 6872 | c = add_cmd ("variables", class_info, info_module_variables_command, _("\ |
| 6873 | Display variables arranged by modules.\n\ |
| 6874 | Usage: info module variables [-q] [-m MODREGEXP] [-t TYPEREGEXP] [REGEXP]\n\ |
| 6875 | Print a summary of all variables within each Fortran module, grouped by\n\ |
| 6876 | module and file. For each variable the line on which the variable is\n\ |
| 6877 | defined is given along with the type and name of the variable.\n\ |
| 6878 | \n\ |
| 6879 | If REGEXP is provided then only variables whose name matches REGEXP are\n\ |
| 6880 | listed. If MODREGEXP is provided then only variables in modules matching\n\ |
| 6881 | MODREGEXP are listed. If TYPEREGEXP is given then only variables whose\n\ |
| 6882 | type matches TYPEREGEXP are listed.\n\ |
| 6883 | \n\ |
| 6884 | The -q flag suppresses printing some header information."), |
| 6885 | &info_module_cmdlist); |
| 6886 | set_cmd_completer_handle_brkchars |
| 6887 | (c, info_module_var_func_command_completer); |
| 6888 | |
| 6889 | add_com ("rbreak", class_breakpoint, rbreak_command, |
| 6890 | _("Set a breakpoint for all functions matching REGEXP.")); |
| 6891 | |
| 6892 | add_setshow_enum_cmd ("multiple-symbols", no_class, |
| 6893 | multiple_symbols_modes, &multiple_symbols_mode, |
| 6894 | _("\ |
| 6895 | Set how the debugger handles ambiguities in expressions."), _("\ |
| 6896 | Show how the debugger handles ambiguities in expressions."), _("\ |
| 6897 | Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."), |
| 6898 | NULL, NULL, &setlist, &showlist); |
| 6899 | |
| 6900 | add_setshow_boolean_cmd ("basenames-may-differ", class_obscure, |
| 6901 | &basenames_may_differ, _("\ |
| 6902 | Set whether a source file may have multiple base names."), _("\ |
| 6903 | Show whether a source file may have multiple base names."), _("\ |
| 6904 | (A \"base name\" is the name of a file with the directory part removed.\n\ |
| 6905 | Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\ |
| 6906 | If set, GDB will canonicalize file names (e.g., expand symlinks)\n\ |
| 6907 | before comparing them. Canonicalization is an expensive operation,\n\ |
| 6908 | but it allows the same file be known by more than one base name.\n\ |
| 6909 | If not set (the default), all source files are assumed to have just\n\ |
| 6910 | one base name, and gdb will do file name comparisons more efficiently."), |
| 6911 | NULL, NULL, |
| 6912 | &setlist, &showlist); |
| 6913 | |
| 6914 | add_setshow_zuinteger_cmd ("symtab-create", no_class, &symtab_create_debug, |
| 6915 | _("Set debugging of symbol table creation."), |
| 6916 | _("Show debugging of symbol table creation."), _("\ |
| 6917 | When enabled (non-zero), debugging messages are printed when building\n\ |
| 6918 | symbol tables. A value of 1 (one) normally provides enough information.\n\ |
| 6919 | A value greater than 1 provides more verbose information."), |
| 6920 | NULL, |
| 6921 | NULL, |
| 6922 | &setdebuglist, &showdebuglist); |
| 6923 | |
| 6924 | add_setshow_zuinteger_cmd ("symbol-lookup", no_class, &symbol_lookup_debug, |
| 6925 | _("\ |
| 6926 | Set debugging of symbol lookup."), _("\ |
| 6927 | Show debugging of symbol lookup."), _("\ |
| 6928 | When enabled (non-zero), symbol lookups are logged."), |
| 6929 | NULL, NULL, |
| 6930 | &setdebuglist, &showdebuglist); |
| 6931 | |
| 6932 | add_setshow_zuinteger_cmd ("symbol-cache-size", no_class, |
| 6933 | &new_symbol_cache_size, |
| 6934 | _("Set the size of the symbol cache."), |
| 6935 | _("Show the size of the symbol cache."), _("\ |
| 6936 | The size of the symbol cache.\n\ |
| 6937 | If zero then the symbol cache is disabled."), |
| 6938 | set_symbol_cache_size_handler, NULL, |
| 6939 | &maintenance_set_cmdlist, |
| 6940 | &maintenance_show_cmdlist); |
| 6941 | |
| 6942 | add_cmd ("symbol-cache", class_maintenance, maintenance_print_symbol_cache, |
| 6943 | _("Dump the symbol cache for each program space."), |
| 6944 | &maintenanceprintlist); |
| 6945 | |
| 6946 | add_cmd ("symbol-cache-statistics", class_maintenance, |
| 6947 | maintenance_print_symbol_cache_statistics, |
| 6948 | _("Print symbol cache statistics for each program space."), |
| 6949 | &maintenanceprintlist); |
| 6950 | |
| 6951 | add_cmd ("flush-symbol-cache", class_maintenance, |
| 6952 | maintenance_flush_symbol_cache, |
| 6953 | _("Flush the symbol cache for each program space."), |
| 6954 | &maintenancelist); |
| 6955 | |
| 6956 | gdb::observers::executable_changed.attach (symtab_observer_executable_changed); |
| 6957 | gdb::observers::new_objfile.attach (symtab_new_objfile_observer); |
| 6958 | gdb::observers::free_objfile.attach (symtab_free_objfile_observer); |
| 6959 | } |