| 1 | /* Symbol table lookup for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009 |
| 5 | Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbtypes.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "frame.h" |
| 27 | #include "target.h" |
| 28 | #include "value.h" |
| 29 | #include "symfile.h" |
| 30 | #include "objfiles.h" |
| 31 | #include "gdbcmd.h" |
| 32 | #include "call-cmds.h" |
| 33 | #include "gdb_regex.h" |
| 34 | #include "expression.h" |
| 35 | #include "language.h" |
| 36 | #include "demangle.h" |
| 37 | #include "inferior.h" |
| 38 | #include "linespec.h" |
| 39 | #include "source.h" |
| 40 | #include "filenames.h" /* for FILENAME_CMP */ |
| 41 | #include "objc-lang.h" |
| 42 | #include "ada-lang.h" |
| 43 | #include "p-lang.h" |
| 44 | #include "addrmap.h" |
| 45 | |
| 46 | #include "hashtab.h" |
| 47 | |
| 48 | #include "gdb_obstack.h" |
| 49 | #include "block.h" |
| 50 | #include "dictionary.h" |
| 51 | |
| 52 | #include <sys/types.h> |
| 53 | #include <fcntl.h> |
| 54 | #include "gdb_string.h" |
| 55 | #include "gdb_stat.h" |
| 56 | #include <ctype.h> |
| 57 | #include "cp-abi.h" |
| 58 | #include "cp-support.h" |
| 59 | #include "observer.h" |
| 60 | #include "gdb_assert.h" |
| 61 | #include "solist.h" |
| 62 | #include "macrotab.h" |
| 63 | #include "macroscope.h" |
| 64 | |
| 65 | /* Prototypes for local functions */ |
| 66 | |
| 67 | static void completion_list_add_name (char *, char *, int, char *, char *); |
| 68 | |
| 69 | static void rbreak_command (char *, int); |
| 70 | |
| 71 | static void types_info (char *, int); |
| 72 | |
| 73 | static void functions_info (char *, int); |
| 74 | |
| 75 | static void variables_info (char *, int); |
| 76 | |
| 77 | static void sources_info (char *, int); |
| 78 | |
| 79 | static void output_source_filename (const char *, int *); |
| 80 | |
| 81 | static int find_line_common (struct linetable *, int, int *); |
| 82 | |
| 83 | /* This one is used by linespec.c */ |
| 84 | |
| 85 | char *operator_chars (char *p, char **end); |
| 86 | |
| 87 | static struct symbol *lookup_symbol_aux (const char *name, |
| 88 | const char *linkage_name, |
| 89 | const struct block *block, |
| 90 | const domain_enum domain, |
| 91 | enum language language, |
| 92 | int *is_a_field_of_this); |
| 93 | |
| 94 | static |
| 95 | struct symbol *lookup_symbol_aux_local (const char *name, |
| 96 | const char *linkage_name, |
| 97 | const struct block *block, |
| 98 | const domain_enum domain); |
| 99 | |
| 100 | static |
| 101 | struct symbol *lookup_symbol_aux_symtabs (int block_index, |
| 102 | const char *name, |
| 103 | const char *linkage_name, |
| 104 | const domain_enum domain); |
| 105 | |
| 106 | static |
| 107 | struct symbol *lookup_symbol_aux_psymtabs (int block_index, |
| 108 | const char *name, |
| 109 | const char *linkage_name, |
| 110 | const domain_enum domain); |
| 111 | |
| 112 | static int file_matches (char *, char **, int); |
| 113 | |
| 114 | static void print_symbol_info (domain_enum, |
| 115 | struct symtab *, struct symbol *, int, char *); |
| 116 | |
| 117 | static void print_msymbol_info (struct minimal_symbol *); |
| 118 | |
| 119 | static void symtab_symbol_info (char *, domain_enum, int); |
| 120 | |
| 121 | void _initialize_symtab (void); |
| 122 | |
| 123 | /* */ |
| 124 | |
| 125 | /* Allow the user to configure the debugger behavior with respect |
| 126 | to multiple-choice menus when more than one symbol matches during |
| 127 | a symbol lookup. */ |
| 128 | |
| 129 | const char multiple_symbols_ask[] = "ask"; |
| 130 | const char multiple_symbols_all[] = "all"; |
| 131 | const char multiple_symbols_cancel[] = "cancel"; |
| 132 | static const char *multiple_symbols_modes[] = |
| 133 | { |
| 134 | multiple_symbols_ask, |
| 135 | multiple_symbols_all, |
| 136 | multiple_symbols_cancel, |
| 137 | NULL |
| 138 | }; |
| 139 | static const char *multiple_symbols_mode = multiple_symbols_all; |
| 140 | |
| 141 | /* Read-only accessor to AUTO_SELECT_MODE. */ |
| 142 | |
| 143 | const char * |
| 144 | multiple_symbols_select_mode (void) |
| 145 | { |
| 146 | return multiple_symbols_mode; |
| 147 | } |
| 148 | |
| 149 | /* Block in which the most recently searched-for symbol was found. |
| 150 | Might be better to make this a parameter to lookup_symbol and |
| 151 | value_of_this. */ |
| 152 | |
| 153 | const struct block *block_found; |
| 154 | |
| 155 | /* Check for a symtab of a specific name; first in symtabs, then in |
| 156 | psymtabs. *If* there is no '/' in the name, a match after a '/' |
| 157 | in the symtab filename will also work. */ |
| 158 | |
| 159 | struct symtab * |
| 160 | lookup_symtab (const char *name) |
| 161 | { |
| 162 | struct symtab *s; |
| 163 | struct partial_symtab *ps; |
| 164 | struct objfile *objfile; |
| 165 | char *real_path = NULL; |
| 166 | char *full_path = NULL; |
| 167 | |
| 168 | /* Here we are interested in canonicalizing an absolute path, not |
| 169 | absolutizing a relative path. */ |
| 170 | if (IS_ABSOLUTE_PATH (name)) |
| 171 | { |
| 172 | full_path = xfullpath (name); |
| 173 | make_cleanup (xfree, full_path); |
| 174 | real_path = gdb_realpath (name); |
| 175 | make_cleanup (xfree, real_path); |
| 176 | } |
| 177 | |
| 178 | got_symtab: |
| 179 | |
| 180 | /* First, search for an exact match */ |
| 181 | |
| 182 | ALL_SYMTABS (objfile, s) |
| 183 | { |
| 184 | if (FILENAME_CMP (name, s->filename) == 0) |
| 185 | { |
| 186 | return s; |
| 187 | } |
| 188 | |
| 189 | /* If the user gave us an absolute path, try to find the file in |
| 190 | this symtab and use its absolute path. */ |
| 191 | |
| 192 | if (full_path != NULL) |
| 193 | { |
| 194 | const char *fp = symtab_to_fullname (s); |
| 195 | if (fp != NULL && FILENAME_CMP (full_path, fp) == 0) |
| 196 | { |
| 197 | return s; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | if (real_path != NULL) |
| 202 | { |
| 203 | char *fullname = symtab_to_fullname (s); |
| 204 | if (fullname != NULL) |
| 205 | { |
| 206 | char *rp = gdb_realpath (fullname); |
| 207 | make_cleanup (xfree, rp); |
| 208 | if (FILENAME_CMP (real_path, rp) == 0) |
| 209 | { |
| 210 | return s; |
| 211 | } |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | /* Now, search for a matching tail (only if name doesn't have any dirs) */ |
| 217 | |
| 218 | if (lbasename (name) == name) |
| 219 | ALL_SYMTABS (objfile, s) |
| 220 | { |
| 221 | if (FILENAME_CMP (lbasename (s->filename), name) == 0) |
| 222 | return s; |
| 223 | } |
| 224 | |
| 225 | /* Same search rules as above apply here, but now we look thru the |
| 226 | psymtabs. */ |
| 227 | |
| 228 | ps = lookup_partial_symtab (name); |
| 229 | if (!ps) |
| 230 | return (NULL); |
| 231 | |
| 232 | if (ps->readin) |
| 233 | error (_("Internal: readin %s pst for `%s' found when no symtab found."), |
| 234 | ps->filename, name); |
| 235 | |
| 236 | s = PSYMTAB_TO_SYMTAB (ps); |
| 237 | |
| 238 | if (s) |
| 239 | return s; |
| 240 | |
| 241 | /* At this point, we have located the psymtab for this file, but |
| 242 | the conversion to a symtab has failed. This usually happens |
| 243 | when we are looking up an include file. In this case, |
| 244 | PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has |
| 245 | been created. So, we need to run through the symtabs again in |
| 246 | order to find the file. |
| 247 | XXX - This is a crock, and should be fixed inside of the the |
| 248 | symbol parsing routines. */ |
| 249 | goto got_symtab; |
| 250 | } |
| 251 | |
| 252 | /* Lookup the partial symbol table of a source file named NAME. |
| 253 | *If* there is no '/' in the name, a match after a '/' |
| 254 | in the psymtab filename will also work. */ |
| 255 | |
| 256 | struct partial_symtab * |
| 257 | lookup_partial_symtab (const char *name) |
| 258 | { |
| 259 | struct partial_symtab *pst; |
| 260 | struct objfile *objfile; |
| 261 | char *full_path = NULL; |
| 262 | char *real_path = NULL; |
| 263 | |
| 264 | /* Here we are interested in canonicalizing an absolute path, not |
| 265 | absolutizing a relative path. */ |
| 266 | if (IS_ABSOLUTE_PATH (name)) |
| 267 | { |
| 268 | full_path = xfullpath (name); |
| 269 | make_cleanup (xfree, full_path); |
| 270 | real_path = gdb_realpath (name); |
| 271 | make_cleanup (xfree, real_path); |
| 272 | } |
| 273 | |
| 274 | ALL_PSYMTABS (objfile, pst) |
| 275 | { |
| 276 | if (FILENAME_CMP (name, pst->filename) == 0) |
| 277 | { |
| 278 | return (pst); |
| 279 | } |
| 280 | |
| 281 | /* If the user gave us an absolute path, try to find the file in |
| 282 | this symtab and use its absolute path. */ |
| 283 | if (full_path != NULL) |
| 284 | { |
| 285 | psymtab_to_fullname (pst); |
| 286 | if (pst->fullname != NULL |
| 287 | && FILENAME_CMP (full_path, pst->fullname) == 0) |
| 288 | { |
| 289 | return pst; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | if (real_path != NULL) |
| 294 | { |
| 295 | char *rp = NULL; |
| 296 | psymtab_to_fullname (pst); |
| 297 | if (pst->fullname != NULL) |
| 298 | { |
| 299 | rp = gdb_realpath (pst->fullname); |
| 300 | make_cleanup (xfree, rp); |
| 301 | } |
| 302 | if (rp != NULL && FILENAME_CMP (real_path, rp) == 0) |
| 303 | { |
| 304 | return pst; |
| 305 | } |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | /* Now, search for a matching tail (only if name doesn't have any dirs) */ |
| 310 | |
| 311 | if (lbasename (name) == name) |
| 312 | ALL_PSYMTABS (objfile, pst) |
| 313 | { |
| 314 | if (FILENAME_CMP (lbasename (pst->filename), name) == 0) |
| 315 | return (pst); |
| 316 | } |
| 317 | |
| 318 | return (NULL); |
| 319 | } |
| 320 | \f |
| 321 | /* Mangle a GDB method stub type. This actually reassembles the pieces of the |
| 322 | full method name, which consist of the class name (from T), the unadorned |
| 323 | method name from METHOD_ID, and the signature for the specific overload, |
| 324 | specified by SIGNATURE_ID. Note that this function is g++ specific. */ |
| 325 | |
| 326 | char * |
| 327 | gdb_mangle_name (struct type *type, int method_id, int signature_id) |
| 328 | { |
| 329 | int mangled_name_len; |
| 330 | char *mangled_name; |
| 331 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id); |
| 332 | struct fn_field *method = &f[signature_id]; |
| 333 | char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id); |
| 334 | char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id); |
| 335 | char *newname = type_name_no_tag (type); |
| 336 | |
| 337 | /* Does the form of physname indicate that it is the full mangled name |
| 338 | of a constructor (not just the args)? */ |
| 339 | int is_full_physname_constructor; |
| 340 | |
| 341 | int is_constructor; |
| 342 | int is_destructor = is_destructor_name (physname); |
| 343 | /* Need a new type prefix. */ |
| 344 | char *const_prefix = method->is_const ? "C" : ""; |
| 345 | char *volatile_prefix = method->is_volatile ? "V" : ""; |
| 346 | char buf[20]; |
| 347 | int len = (newname == NULL ? 0 : strlen (newname)); |
| 348 | |
| 349 | /* Nothing to do if physname already contains a fully mangled v3 abi name |
| 350 | or an operator name. */ |
| 351 | if ((physname[0] == '_' && physname[1] == 'Z') |
| 352 | || is_operator_name (field_name)) |
| 353 | return xstrdup (physname); |
| 354 | |
| 355 | is_full_physname_constructor = is_constructor_name (physname); |
| 356 | |
| 357 | is_constructor = |
| 358 | is_full_physname_constructor || (newname && strcmp (field_name, newname) == 0); |
| 359 | |
| 360 | if (!is_destructor) |
| 361 | is_destructor = (strncmp (physname, "__dt", 4) == 0); |
| 362 | |
| 363 | if (is_destructor || is_full_physname_constructor) |
| 364 | { |
| 365 | mangled_name = (char *) xmalloc (strlen (physname) + 1); |
| 366 | strcpy (mangled_name, physname); |
| 367 | return mangled_name; |
| 368 | } |
| 369 | |
| 370 | if (len == 0) |
| 371 | { |
| 372 | sprintf (buf, "__%s%s", const_prefix, volatile_prefix); |
| 373 | } |
| 374 | else if (physname[0] == 't' || physname[0] == 'Q') |
| 375 | { |
| 376 | /* The physname for template and qualified methods already includes |
| 377 | the class name. */ |
| 378 | sprintf (buf, "__%s%s", const_prefix, volatile_prefix); |
| 379 | newname = NULL; |
| 380 | len = 0; |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len); |
| 385 | } |
| 386 | mangled_name_len = ((is_constructor ? 0 : strlen (field_name)) |
| 387 | + strlen (buf) + len + strlen (physname) + 1); |
| 388 | |
| 389 | { |
| 390 | mangled_name = (char *) xmalloc (mangled_name_len); |
| 391 | if (is_constructor) |
| 392 | mangled_name[0] = '\0'; |
| 393 | else |
| 394 | strcpy (mangled_name, field_name); |
| 395 | } |
| 396 | strcat (mangled_name, buf); |
| 397 | /* If the class doesn't have a name, i.e. newname NULL, then we just |
| 398 | mangle it using 0 for the length of the class. Thus it gets mangled |
| 399 | as something starting with `::' rather than `classname::'. */ |
| 400 | if (newname != NULL) |
| 401 | strcat (mangled_name, newname); |
| 402 | |
| 403 | strcat (mangled_name, physname); |
| 404 | return (mangled_name); |
| 405 | } |
| 406 | |
| 407 | \f |
| 408 | /* Initialize the language dependent portion of a symbol |
| 409 | depending upon the language for the symbol. */ |
| 410 | void |
| 411 | symbol_init_language_specific (struct general_symbol_info *gsymbol, |
| 412 | enum language language) |
| 413 | { |
| 414 | gsymbol->language = language; |
| 415 | if (gsymbol->language == language_cplus |
| 416 | || gsymbol->language == language_java |
| 417 | || gsymbol->language == language_objc) |
| 418 | { |
| 419 | gsymbol->language_specific.cplus_specific.demangled_name = NULL; |
| 420 | } |
| 421 | else |
| 422 | { |
| 423 | memset (&gsymbol->language_specific, 0, |
| 424 | sizeof (gsymbol->language_specific)); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /* Functions to initialize a symbol's mangled name. */ |
| 429 | |
| 430 | /* Create the hash table used for demangled names. Each hash entry is |
| 431 | a pair of strings; one for the mangled name and one for the demangled |
| 432 | name. The entry is hashed via just the mangled name. */ |
| 433 | |
| 434 | static void |
| 435 | create_demangled_names_hash (struct objfile *objfile) |
| 436 | { |
| 437 | /* Choose 256 as the starting size of the hash table, somewhat arbitrarily. |
| 438 | The hash table code will round this up to the next prime number. |
| 439 | Choosing a much larger table size wastes memory, and saves only about |
| 440 | 1% in symbol reading. */ |
| 441 | |
| 442 | objfile->demangled_names_hash = htab_create_alloc |
| 443 | (256, htab_hash_string, (int (*) (const void *, const void *)) streq, |
| 444 | NULL, xcalloc, xfree); |
| 445 | } |
| 446 | |
| 447 | /* Try to determine the demangled name for a symbol, based on the |
| 448 | language of that symbol. If the language is set to language_auto, |
| 449 | it will attempt to find any demangling algorithm that works and |
| 450 | then set the language appropriately. The returned name is allocated |
| 451 | by the demangler and should be xfree'd. */ |
| 452 | |
| 453 | static char * |
| 454 | symbol_find_demangled_name (struct general_symbol_info *gsymbol, |
| 455 | const char *mangled) |
| 456 | { |
| 457 | char *demangled = NULL; |
| 458 | |
| 459 | if (gsymbol->language == language_unknown) |
| 460 | gsymbol->language = language_auto; |
| 461 | |
| 462 | if (gsymbol->language == language_objc |
| 463 | || gsymbol->language == language_auto) |
| 464 | { |
| 465 | demangled = |
| 466 | objc_demangle (mangled, 0); |
| 467 | if (demangled != NULL) |
| 468 | { |
| 469 | gsymbol->language = language_objc; |
| 470 | return demangled; |
| 471 | } |
| 472 | } |
| 473 | if (gsymbol->language == language_cplus |
| 474 | || gsymbol->language == language_auto) |
| 475 | { |
| 476 | demangled = |
| 477 | cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); |
| 478 | if (demangled != NULL) |
| 479 | { |
| 480 | gsymbol->language = language_cplus; |
| 481 | return demangled; |
| 482 | } |
| 483 | } |
| 484 | if (gsymbol->language == language_java) |
| 485 | { |
| 486 | demangled = |
| 487 | cplus_demangle (mangled, |
| 488 | DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA); |
| 489 | if (demangled != NULL) |
| 490 | { |
| 491 | gsymbol->language = language_java; |
| 492 | return demangled; |
| 493 | } |
| 494 | } |
| 495 | return NULL; |
| 496 | } |
| 497 | |
| 498 | /* Set both the mangled and demangled (if any) names for GSYMBOL based |
| 499 | on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE |
| 500 | is used, and the memory comes from that objfile's objfile_obstack. |
| 501 | LINKAGE_NAME is copied, so the pointer can be discarded after |
| 502 | calling this function. */ |
| 503 | |
| 504 | /* We have to be careful when dealing with Java names: when we run |
| 505 | into a Java minimal symbol, we don't know it's a Java symbol, so it |
| 506 | gets demangled as a C++ name. This is unfortunate, but there's not |
| 507 | much we can do about it: but when demangling partial symbols and |
| 508 | regular symbols, we'd better not reuse the wrong demangled name. |
| 509 | (See PR gdb/1039.) We solve this by putting a distinctive prefix |
| 510 | on Java names when storing them in the hash table. */ |
| 511 | |
| 512 | /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I |
| 513 | don't mind the Java prefix so much: different languages have |
| 514 | different demangling requirements, so it's only natural that we |
| 515 | need to keep language data around in our demangling cache. But |
| 516 | it's not good that the minimal symbol has the wrong demangled name. |
| 517 | Unfortunately, I can't think of any easy solution to that |
| 518 | problem. */ |
| 519 | |
| 520 | #define JAVA_PREFIX "##JAVA$$" |
| 521 | #define JAVA_PREFIX_LEN 8 |
| 522 | |
| 523 | void |
| 524 | symbol_set_names (struct general_symbol_info *gsymbol, |
| 525 | const char *linkage_name, int len, struct objfile *objfile) |
| 526 | { |
| 527 | char **slot; |
| 528 | /* A 0-terminated copy of the linkage name. */ |
| 529 | const char *linkage_name_copy; |
| 530 | /* A copy of the linkage name that might have a special Java prefix |
| 531 | added to it, for use when looking names up in the hash table. */ |
| 532 | const char *lookup_name; |
| 533 | /* The length of lookup_name. */ |
| 534 | int lookup_len; |
| 535 | |
| 536 | if (objfile->demangled_names_hash == NULL) |
| 537 | create_demangled_names_hash (objfile); |
| 538 | |
| 539 | if (gsymbol->language == language_ada) |
| 540 | { |
| 541 | /* In Ada, we do the symbol lookups using the mangled name, so |
| 542 | we can save some space by not storing the demangled name. |
| 543 | |
| 544 | As a side note, we have also observed some overlap between |
| 545 | the C++ mangling and Ada mangling, similarly to what has |
| 546 | been observed with Java. Because we don't store the demangled |
| 547 | name with the symbol, we don't need to use the same trick |
| 548 | as Java. */ |
| 549 | gsymbol->name = obstack_alloc (&objfile->objfile_obstack, len + 1); |
| 550 | memcpy (gsymbol->name, linkage_name, len); |
| 551 | gsymbol->name[len] = '\0'; |
| 552 | gsymbol->language_specific.cplus_specific.demangled_name = NULL; |
| 553 | |
| 554 | return; |
| 555 | } |
| 556 | |
| 557 | /* The stabs reader generally provides names that are not |
| 558 | NUL-terminated; most of the other readers don't do this, so we |
| 559 | can just use the given copy, unless we're in the Java case. */ |
| 560 | if (gsymbol->language == language_java) |
| 561 | { |
| 562 | char *alloc_name; |
| 563 | lookup_len = len + JAVA_PREFIX_LEN; |
| 564 | |
| 565 | alloc_name = alloca (lookup_len + 1); |
| 566 | memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN); |
| 567 | memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len); |
| 568 | alloc_name[lookup_len] = '\0'; |
| 569 | |
| 570 | lookup_name = alloc_name; |
| 571 | linkage_name_copy = alloc_name + JAVA_PREFIX_LEN; |
| 572 | } |
| 573 | else if (linkage_name[len] != '\0') |
| 574 | { |
| 575 | char *alloc_name; |
| 576 | lookup_len = len; |
| 577 | |
| 578 | alloc_name = alloca (lookup_len + 1); |
| 579 | memcpy (alloc_name, linkage_name, len); |
| 580 | alloc_name[lookup_len] = '\0'; |
| 581 | |
| 582 | lookup_name = alloc_name; |
| 583 | linkage_name_copy = alloc_name; |
| 584 | } |
| 585 | else |
| 586 | { |
| 587 | lookup_len = len; |
| 588 | lookup_name = linkage_name; |
| 589 | linkage_name_copy = linkage_name; |
| 590 | } |
| 591 | |
| 592 | slot = (char **) htab_find_slot (objfile->demangled_names_hash, |
| 593 | lookup_name, INSERT); |
| 594 | |
| 595 | /* If this name is not in the hash table, add it. */ |
| 596 | if (*slot == NULL) |
| 597 | { |
| 598 | char *demangled_name = symbol_find_demangled_name (gsymbol, |
| 599 | linkage_name_copy); |
| 600 | int demangled_len = demangled_name ? strlen (demangled_name) : 0; |
| 601 | |
| 602 | /* If there is a demangled name, place it right after the mangled name. |
| 603 | Otherwise, just place a second zero byte after the end of the mangled |
| 604 | name. */ |
| 605 | *slot = obstack_alloc (&objfile->objfile_obstack, |
| 606 | lookup_len + demangled_len + 2); |
| 607 | memcpy (*slot, lookup_name, lookup_len + 1); |
| 608 | if (demangled_name != NULL) |
| 609 | { |
| 610 | memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1); |
| 611 | xfree (demangled_name); |
| 612 | } |
| 613 | else |
| 614 | (*slot)[lookup_len + 1] = '\0'; |
| 615 | } |
| 616 | |
| 617 | gsymbol->name = *slot + lookup_len - len; |
| 618 | if ((*slot)[lookup_len + 1] != '\0') |
| 619 | gsymbol->language_specific.cplus_specific.demangled_name |
| 620 | = &(*slot)[lookup_len + 1]; |
| 621 | else |
| 622 | gsymbol->language_specific.cplus_specific.demangled_name = NULL; |
| 623 | } |
| 624 | |
| 625 | /* Return the source code name of a symbol. In languages where |
| 626 | demangling is necessary, this is the demangled name. */ |
| 627 | |
| 628 | char * |
| 629 | symbol_natural_name (const struct general_symbol_info *gsymbol) |
| 630 | { |
| 631 | switch (gsymbol->language) |
| 632 | { |
| 633 | case language_cplus: |
| 634 | case language_java: |
| 635 | case language_objc: |
| 636 | if (gsymbol->language_specific.cplus_specific.demangled_name != NULL) |
| 637 | return gsymbol->language_specific.cplus_specific.demangled_name; |
| 638 | break; |
| 639 | case language_ada: |
| 640 | if (gsymbol->language_specific.cplus_specific.demangled_name != NULL) |
| 641 | return gsymbol->language_specific.cplus_specific.demangled_name; |
| 642 | else |
| 643 | return ada_decode_symbol (gsymbol); |
| 644 | break; |
| 645 | default: |
| 646 | break; |
| 647 | } |
| 648 | return gsymbol->name; |
| 649 | } |
| 650 | |
| 651 | /* Return the demangled name for a symbol based on the language for |
| 652 | that symbol. If no demangled name exists, return NULL. */ |
| 653 | char * |
| 654 | symbol_demangled_name (const struct general_symbol_info *gsymbol) |
| 655 | { |
| 656 | switch (gsymbol->language) |
| 657 | { |
| 658 | case language_cplus: |
| 659 | case language_java: |
| 660 | case language_objc: |
| 661 | if (gsymbol->language_specific.cplus_specific.demangled_name != NULL) |
| 662 | return gsymbol->language_specific.cplus_specific.demangled_name; |
| 663 | break; |
| 664 | case language_ada: |
| 665 | if (gsymbol->language_specific.cplus_specific.demangled_name != NULL) |
| 666 | return gsymbol->language_specific.cplus_specific.demangled_name; |
| 667 | else |
| 668 | return ada_decode_symbol (gsymbol); |
| 669 | break; |
| 670 | default: |
| 671 | break; |
| 672 | } |
| 673 | return NULL; |
| 674 | } |
| 675 | |
| 676 | /* Return the search name of a symbol---generally the demangled or |
| 677 | linkage name of the symbol, depending on how it will be searched for. |
| 678 | If there is no distinct demangled name, then returns the same value |
| 679 | (same pointer) as SYMBOL_LINKAGE_NAME. */ |
| 680 | char * |
| 681 | symbol_search_name (const struct general_symbol_info *gsymbol) |
| 682 | { |
| 683 | if (gsymbol->language == language_ada) |
| 684 | return gsymbol->name; |
| 685 | else |
| 686 | return symbol_natural_name (gsymbol); |
| 687 | } |
| 688 | |
| 689 | /* Initialize the structure fields to zero values. */ |
| 690 | void |
| 691 | init_sal (struct symtab_and_line *sal) |
| 692 | { |
| 693 | sal->symtab = 0; |
| 694 | sal->section = 0; |
| 695 | sal->line = 0; |
| 696 | sal->pc = 0; |
| 697 | sal->end = 0; |
| 698 | sal->explicit_pc = 0; |
| 699 | sal->explicit_line = 0; |
| 700 | } |
| 701 | \f |
| 702 | |
| 703 | /* Return 1 if the two sections are the same, or if they could |
| 704 | plausibly be copies of each other, one in an original object |
| 705 | file and another in a separated debug file. */ |
| 706 | |
| 707 | int |
| 708 | matching_obj_sections (struct obj_section *obj_first, |
| 709 | struct obj_section *obj_second) |
| 710 | { |
| 711 | asection *first = obj_first? obj_first->the_bfd_section : NULL; |
| 712 | asection *second = obj_second? obj_second->the_bfd_section : NULL; |
| 713 | struct objfile *obj; |
| 714 | |
| 715 | /* If they're the same section, then they match. */ |
| 716 | if (first == second) |
| 717 | return 1; |
| 718 | |
| 719 | /* If either is NULL, give up. */ |
| 720 | if (first == NULL || second == NULL) |
| 721 | return 0; |
| 722 | |
| 723 | /* This doesn't apply to absolute symbols. */ |
| 724 | if (first->owner == NULL || second->owner == NULL) |
| 725 | return 0; |
| 726 | |
| 727 | /* If they're in the same object file, they must be different sections. */ |
| 728 | if (first->owner == second->owner) |
| 729 | return 0; |
| 730 | |
| 731 | /* Check whether the two sections are potentially corresponding. They must |
| 732 | have the same size, address, and name. We can't compare section indexes, |
| 733 | which would be more reliable, because some sections may have been |
| 734 | stripped. */ |
| 735 | if (bfd_get_section_size (first) != bfd_get_section_size (second)) |
| 736 | return 0; |
| 737 | |
| 738 | /* In-memory addresses may start at a different offset, relativize them. */ |
| 739 | if (bfd_get_section_vma (first->owner, first) |
| 740 | - bfd_get_start_address (first->owner) |
| 741 | != bfd_get_section_vma (second->owner, second) |
| 742 | - bfd_get_start_address (second->owner)) |
| 743 | return 0; |
| 744 | |
| 745 | if (bfd_get_section_name (first->owner, first) == NULL |
| 746 | || bfd_get_section_name (second->owner, second) == NULL |
| 747 | || strcmp (bfd_get_section_name (first->owner, first), |
| 748 | bfd_get_section_name (second->owner, second)) != 0) |
| 749 | return 0; |
| 750 | |
| 751 | /* Otherwise check that they are in corresponding objfiles. */ |
| 752 | |
| 753 | ALL_OBJFILES (obj) |
| 754 | if (obj->obfd == first->owner) |
| 755 | break; |
| 756 | gdb_assert (obj != NULL); |
| 757 | |
| 758 | if (obj->separate_debug_objfile != NULL |
| 759 | && obj->separate_debug_objfile->obfd == second->owner) |
| 760 | return 1; |
| 761 | if (obj->separate_debug_objfile_backlink != NULL |
| 762 | && obj->separate_debug_objfile_backlink->obfd == second->owner) |
| 763 | return 1; |
| 764 | |
| 765 | return 0; |
| 766 | } |
| 767 | |
| 768 | /* Find which partial symtab contains PC and SECTION starting at psymtab PST. |
| 769 | We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */ |
| 770 | |
| 771 | static struct partial_symtab * |
| 772 | find_pc_sect_psymtab_closer (CORE_ADDR pc, struct obj_section *section, |
| 773 | struct partial_symtab *pst, |
| 774 | struct minimal_symbol *msymbol) |
| 775 | { |
| 776 | struct objfile *objfile = pst->objfile; |
| 777 | struct partial_symtab *tpst; |
| 778 | struct partial_symtab *best_pst = pst; |
| 779 | CORE_ADDR best_addr = pst->textlow; |
| 780 | |
| 781 | /* An objfile that has its functions reordered might have |
| 782 | many partial symbol tables containing the PC, but |
| 783 | we want the partial symbol table that contains the |
| 784 | function containing the PC. */ |
| 785 | if (!(objfile->flags & OBJF_REORDERED) && |
| 786 | section == 0) /* can't validate section this way */ |
| 787 | return pst; |
| 788 | |
| 789 | if (msymbol == NULL) |
| 790 | return (pst); |
| 791 | |
| 792 | /* The code range of partial symtabs sometimes overlap, so, in |
| 793 | the loop below, we need to check all partial symtabs and |
| 794 | find the one that fits better for the given PC address. We |
| 795 | select the partial symtab that contains a symbol whose |
| 796 | address is closest to the PC address. By closest we mean |
| 797 | that find_pc_sect_symbol returns the symbol with address |
| 798 | that is closest and still less than the given PC. */ |
| 799 | for (tpst = pst; tpst != NULL; tpst = tpst->next) |
| 800 | { |
| 801 | if (pc >= tpst->textlow && pc < tpst->texthigh) |
| 802 | { |
| 803 | struct partial_symbol *p; |
| 804 | CORE_ADDR this_addr; |
| 805 | |
| 806 | /* NOTE: This assumes that every psymbol has a |
| 807 | corresponding msymbol, which is not necessarily |
| 808 | true; the debug info might be much richer than the |
| 809 | object's symbol table. */ |
| 810 | p = find_pc_sect_psymbol (tpst, pc, section); |
| 811 | if (p != NULL |
| 812 | && SYMBOL_VALUE_ADDRESS (p) |
| 813 | == SYMBOL_VALUE_ADDRESS (msymbol)) |
| 814 | return tpst; |
| 815 | |
| 816 | /* Also accept the textlow value of a psymtab as a |
| 817 | "symbol", to provide some support for partial |
| 818 | symbol tables with line information but no debug |
| 819 | symbols (e.g. those produced by an assembler). */ |
| 820 | if (p != NULL) |
| 821 | this_addr = SYMBOL_VALUE_ADDRESS (p); |
| 822 | else |
| 823 | this_addr = tpst->textlow; |
| 824 | |
| 825 | /* Check whether it is closer than our current |
| 826 | BEST_ADDR. Since this symbol address is |
| 827 | necessarily lower or equal to PC, the symbol closer |
| 828 | to PC is the symbol which address is the highest. |
| 829 | This way we return the psymtab which contains such |
| 830 | best match symbol. This can help in cases where the |
| 831 | symbol information/debuginfo is not complete, like |
| 832 | for instance on IRIX6 with gcc, where no debug info |
| 833 | is emitted for statics. (See also the nodebug.exp |
| 834 | testcase.) */ |
| 835 | if (this_addr > best_addr) |
| 836 | { |
| 837 | best_addr = this_addr; |
| 838 | best_pst = tpst; |
| 839 | } |
| 840 | } |
| 841 | } |
| 842 | return best_pst; |
| 843 | } |
| 844 | |
| 845 | /* Find which partial symtab contains PC and SECTION. Return 0 if |
| 846 | none. We return the psymtab that contains a symbol whose address |
| 847 | exactly matches PC, or, if we cannot find an exact match, the |
| 848 | psymtab that contains a symbol whose address is closest to PC. */ |
| 849 | struct partial_symtab * |
| 850 | find_pc_sect_psymtab (CORE_ADDR pc, struct obj_section *section) |
| 851 | { |
| 852 | struct objfile *objfile; |
| 853 | struct minimal_symbol *msymbol; |
| 854 | |
| 855 | /* If we know that this is not a text address, return failure. This is |
| 856 | necessary because we loop based on texthigh and textlow, which do |
| 857 | not include the data ranges. */ |
| 858 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 859 | if (msymbol |
| 860 | && (MSYMBOL_TYPE (msymbol) == mst_data |
| 861 | || MSYMBOL_TYPE (msymbol) == mst_bss |
| 862 | || MSYMBOL_TYPE (msymbol) == mst_abs |
| 863 | || MSYMBOL_TYPE (msymbol) == mst_file_data |
| 864 | || MSYMBOL_TYPE (msymbol) == mst_file_bss)) |
| 865 | return NULL; |
| 866 | |
| 867 | /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity |
| 868 | than the later used TEXTLOW/TEXTHIGH one. */ |
| 869 | |
| 870 | ALL_OBJFILES (objfile) |
| 871 | if (objfile->psymtabs_addrmap != NULL) |
| 872 | { |
| 873 | struct partial_symtab *pst; |
| 874 | |
| 875 | pst = addrmap_find (objfile->psymtabs_addrmap, pc); |
| 876 | if (pst != NULL) |
| 877 | { |
| 878 | /* FIXME: addrmaps currently do not handle overlayed sections, |
| 879 | so fall back to the non-addrmap case if we're debugging |
| 880 | overlays and the addrmap returned the wrong section. */ |
| 881 | if (overlay_debugging && msymbol && section) |
| 882 | { |
| 883 | struct partial_symbol *p; |
| 884 | /* NOTE: This assumes that every psymbol has a |
| 885 | corresponding msymbol, which is not necessarily |
| 886 | true; the debug info might be much richer than the |
| 887 | object's symbol table. */ |
| 888 | p = find_pc_sect_psymbol (pst, pc, section); |
| 889 | if (!p |
| 890 | || SYMBOL_VALUE_ADDRESS (p) |
| 891 | != SYMBOL_VALUE_ADDRESS (msymbol)) |
| 892 | continue; |
| 893 | } |
| 894 | |
| 895 | /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as |
| 896 | PSYMTABS_ADDRMAP we used has already the best 1-byte |
| 897 | granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into |
| 898 | a worse chosen section due to the TEXTLOW/TEXTHIGH ranges |
| 899 | overlap. */ |
| 900 | |
| 901 | return pst; |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs |
| 906 | which still have no corresponding full SYMTABs read. But it is not |
| 907 | present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB |
| 908 | so far. */ |
| 909 | |
| 910 | ALL_OBJFILES (objfile) |
| 911 | { |
| 912 | struct partial_symtab *pst; |
| 913 | |
| 914 | /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of |
| 915 | its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying |
| 916 | debug info type in single OBJFILE. */ |
| 917 | |
| 918 | ALL_OBJFILE_PSYMTABS (objfile, pst) |
| 919 | if (pc >= pst->textlow && pc < pst->texthigh) |
| 920 | { |
| 921 | struct partial_symtab *best_pst; |
| 922 | |
| 923 | best_pst = find_pc_sect_psymtab_closer (pc, section, pst, |
| 924 | msymbol); |
| 925 | if (best_pst != NULL) |
| 926 | return best_pst; |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | return NULL; |
| 931 | } |
| 932 | |
| 933 | /* Find which partial symtab contains PC. Return 0 if none. |
| 934 | Backward compatibility, no section */ |
| 935 | |
| 936 | struct partial_symtab * |
| 937 | find_pc_psymtab (CORE_ADDR pc) |
| 938 | { |
| 939 | return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc)); |
| 940 | } |
| 941 | |
| 942 | /* Find which partial symbol within a psymtab matches PC and SECTION. |
| 943 | Return 0 if none. Check all psymtabs if PSYMTAB is 0. */ |
| 944 | |
| 945 | struct partial_symbol * |
| 946 | find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc, |
| 947 | struct obj_section *section) |
| 948 | { |
| 949 | struct partial_symbol *best = NULL, *p, **pp; |
| 950 | CORE_ADDR best_pc; |
| 951 | |
| 952 | if (!psymtab) |
| 953 | psymtab = find_pc_sect_psymtab (pc, section); |
| 954 | if (!psymtab) |
| 955 | return 0; |
| 956 | |
| 957 | /* Cope with programs that start at address 0 */ |
| 958 | best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0; |
| 959 | |
| 960 | /* Search the global symbols as well as the static symbols, so that |
| 961 | find_pc_partial_function doesn't use a minimal symbol and thus |
| 962 | cache a bad endaddr. */ |
| 963 | for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset; |
| 964 | (pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset) |
| 965 | < psymtab->n_global_syms); |
| 966 | pp++) |
| 967 | { |
| 968 | p = *pp; |
| 969 | if (SYMBOL_DOMAIN (p) == VAR_DOMAIN |
| 970 | && SYMBOL_CLASS (p) == LOC_BLOCK |
| 971 | && pc >= SYMBOL_VALUE_ADDRESS (p) |
| 972 | && (SYMBOL_VALUE_ADDRESS (p) > best_pc |
| 973 | || (psymtab->textlow == 0 |
| 974 | && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0))) |
| 975 | { |
| 976 | if (section) /* match on a specific section */ |
| 977 | { |
| 978 | fixup_psymbol_section (p, psymtab->objfile); |
| 979 | if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p), section)) |
| 980 | continue; |
| 981 | } |
| 982 | best_pc = SYMBOL_VALUE_ADDRESS (p); |
| 983 | best = p; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset; |
| 988 | (pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset) |
| 989 | < psymtab->n_static_syms); |
| 990 | pp++) |
| 991 | { |
| 992 | p = *pp; |
| 993 | if (SYMBOL_DOMAIN (p) == VAR_DOMAIN |
| 994 | && SYMBOL_CLASS (p) == LOC_BLOCK |
| 995 | && pc >= SYMBOL_VALUE_ADDRESS (p) |
| 996 | && (SYMBOL_VALUE_ADDRESS (p) > best_pc |
| 997 | || (psymtab->textlow == 0 |
| 998 | && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0))) |
| 999 | { |
| 1000 | if (section) /* match on a specific section */ |
| 1001 | { |
| 1002 | fixup_psymbol_section (p, psymtab->objfile); |
| 1003 | if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p), section)) |
| 1004 | continue; |
| 1005 | } |
| 1006 | best_pc = SYMBOL_VALUE_ADDRESS (p); |
| 1007 | best = p; |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | return best; |
| 1012 | } |
| 1013 | |
| 1014 | /* Find which partial symbol within a psymtab matches PC. Return 0 if none. |
| 1015 | Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */ |
| 1016 | |
| 1017 | struct partial_symbol * |
| 1018 | find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc) |
| 1019 | { |
| 1020 | return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc)); |
| 1021 | } |
| 1022 | \f |
| 1023 | /* Debug symbols usually don't have section information. We need to dig that |
| 1024 | out of the minimal symbols and stash that in the debug symbol. */ |
| 1025 | |
| 1026 | static void |
| 1027 | fixup_section (struct general_symbol_info *ginfo, |
| 1028 | CORE_ADDR addr, struct objfile *objfile) |
| 1029 | { |
| 1030 | struct minimal_symbol *msym; |
| 1031 | |
| 1032 | /* First, check whether a minimal symbol with the same name exists |
| 1033 | and points to the same address. The address check is required |
| 1034 | e.g. on PowerPC64, where the minimal symbol for a function will |
| 1035 | point to the function descriptor, while the debug symbol will |
| 1036 | point to the actual function code. */ |
| 1037 | msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile); |
| 1038 | if (msym) |
| 1039 | { |
| 1040 | ginfo->obj_section = SYMBOL_OBJ_SECTION (msym); |
| 1041 | ginfo->section = SYMBOL_SECTION (msym); |
| 1042 | } |
| 1043 | else |
| 1044 | { |
| 1045 | /* Static, function-local variables do appear in the linker |
| 1046 | (minimal) symbols, but are frequently given names that won't |
| 1047 | be found via lookup_minimal_symbol(). E.g., it has been |
| 1048 | observed in frv-uclinux (ELF) executables that a static, |
| 1049 | function-local variable named "foo" might appear in the |
| 1050 | linker symbols as "foo.6" or "foo.3". Thus, there is no |
| 1051 | point in attempting to extend the lookup-by-name mechanism to |
| 1052 | handle this case due to the fact that there can be multiple |
| 1053 | names. |
| 1054 | |
| 1055 | So, instead, search the section table when lookup by name has |
| 1056 | failed. The ``addr'' and ``endaddr'' fields may have already |
| 1057 | been relocated. If so, the relocation offset (i.e. the |
| 1058 | ANOFFSET value) needs to be subtracted from these values when |
| 1059 | performing the comparison. We unconditionally subtract it, |
| 1060 | because, when no relocation has been performed, the ANOFFSET |
| 1061 | value will simply be zero. |
| 1062 | |
| 1063 | The address of the symbol whose section we're fixing up HAS |
| 1064 | NOT BEEN adjusted (relocated) yet. It can't have been since |
| 1065 | the section isn't yet known and knowing the section is |
| 1066 | necessary in order to add the correct relocation value. In |
| 1067 | other words, we wouldn't even be in this function (attempting |
| 1068 | to compute the section) if it were already known. |
| 1069 | |
| 1070 | Note that it is possible to search the minimal symbols |
| 1071 | (subtracting the relocation value if necessary) to find the |
| 1072 | matching minimal symbol, but this is overkill and much less |
| 1073 | efficient. It is not necessary to find the matching minimal |
| 1074 | symbol, only its section. |
| 1075 | |
| 1076 | Note that this technique (of doing a section table search) |
| 1077 | can fail when unrelocated section addresses overlap. For |
| 1078 | this reason, we still attempt a lookup by name prior to doing |
| 1079 | a search of the section table. */ |
| 1080 | |
| 1081 | struct obj_section *s; |
| 1082 | ALL_OBJFILE_OSECTIONS (objfile, s) |
| 1083 | { |
| 1084 | int idx = s->the_bfd_section->index; |
| 1085 | CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx); |
| 1086 | |
| 1087 | if (obj_section_addr (s) - offset <= addr |
| 1088 | && addr < obj_section_endaddr (s) - offset) |
| 1089 | { |
| 1090 | ginfo->obj_section = s; |
| 1091 | ginfo->section = idx; |
| 1092 | return; |
| 1093 | } |
| 1094 | } |
| 1095 | } |
| 1096 | } |
| 1097 | |
| 1098 | struct symbol * |
| 1099 | fixup_symbol_section (struct symbol *sym, struct objfile *objfile) |
| 1100 | { |
| 1101 | CORE_ADDR addr; |
| 1102 | |
| 1103 | if (!sym) |
| 1104 | return NULL; |
| 1105 | |
| 1106 | if (SYMBOL_OBJ_SECTION (sym)) |
| 1107 | return sym; |
| 1108 | |
| 1109 | /* We either have an OBJFILE, or we can get at it from the sym's |
| 1110 | symtab. Anything else is a bug. */ |
| 1111 | gdb_assert (objfile || SYMBOL_SYMTAB (sym)); |
| 1112 | |
| 1113 | if (objfile == NULL) |
| 1114 | objfile = SYMBOL_SYMTAB (sym)->objfile; |
| 1115 | |
| 1116 | /* We should have an objfile by now. */ |
| 1117 | gdb_assert (objfile); |
| 1118 | |
| 1119 | switch (SYMBOL_CLASS (sym)) |
| 1120 | { |
| 1121 | case LOC_STATIC: |
| 1122 | case LOC_LABEL: |
| 1123 | addr = SYMBOL_VALUE_ADDRESS (sym); |
| 1124 | break; |
| 1125 | case LOC_BLOCK: |
| 1126 | addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 1127 | break; |
| 1128 | |
| 1129 | default: |
| 1130 | /* Nothing else will be listed in the minsyms -- no use looking |
| 1131 | it up. */ |
| 1132 | return sym; |
| 1133 | } |
| 1134 | |
| 1135 | fixup_section (&sym->ginfo, addr, objfile); |
| 1136 | |
| 1137 | return sym; |
| 1138 | } |
| 1139 | |
| 1140 | struct partial_symbol * |
| 1141 | fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile) |
| 1142 | { |
| 1143 | CORE_ADDR addr; |
| 1144 | |
| 1145 | if (!psym) |
| 1146 | return NULL; |
| 1147 | |
| 1148 | if (SYMBOL_OBJ_SECTION (psym)) |
| 1149 | return psym; |
| 1150 | |
| 1151 | gdb_assert (objfile); |
| 1152 | |
| 1153 | switch (SYMBOL_CLASS (psym)) |
| 1154 | { |
| 1155 | case LOC_STATIC: |
| 1156 | case LOC_LABEL: |
| 1157 | case LOC_BLOCK: |
| 1158 | addr = SYMBOL_VALUE_ADDRESS (psym); |
| 1159 | break; |
| 1160 | default: |
| 1161 | /* Nothing else will be listed in the minsyms -- no use looking |
| 1162 | it up. */ |
| 1163 | return psym; |
| 1164 | } |
| 1165 | |
| 1166 | fixup_section (&psym->ginfo, addr, objfile); |
| 1167 | |
| 1168 | return psym; |
| 1169 | } |
| 1170 | |
| 1171 | /* Find the definition for a specified symbol name NAME |
| 1172 | in domain DOMAIN, visible from lexical block BLOCK. |
| 1173 | Returns the struct symbol pointer, or zero if no symbol is found. |
| 1174 | C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if |
| 1175 | NAME is a field of the current implied argument `this'. If so set |
| 1176 | *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero. |
| 1177 | BLOCK_FOUND is set to the block in which NAME is found (in the case of |
| 1178 | a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */ |
| 1179 | |
| 1180 | /* This function has a bunch of loops in it and it would seem to be |
| 1181 | attractive to put in some QUIT's (though I'm not really sure |
| 1182 | whether it can run long enough to be really important). But there |
| 1183 | are a few calls for which it would appear to be bad news to quit |
| 1184 | out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note |
| 1185 | that there is C++ code below which can error(), but that probably |
| 1186 | doesn't affect these calls since they are looking for a known |
| 1187 | variable and thus can probably assume it will never hit the C++ |
| 1188 | code). */ |
| 1189 | |
| 1190 | struct symbol * |
| 1191 | lookup_symbol_in_language (const char *name, const struct block *block, |
| 1192 | const domain_enum domain, enum language lang, |
| 1193 | int *is_a_field_of_this) |
| 1194 | { |
| 1195 | char *demangled_name = NULL; |
| 1196 | const char *modified_name = NULL; |
| 1197 | const char *mangled_name = NULL; |
| 1198 | struct symbol *returnval; |
| 1199 | struct cleanup *cleanup = make_cleanup (null_cleanup, 0); |
| 1200 | |
| 1201 | modified_name = name; |
| 1202 | |
| 1203 | /* If we are using C++ or Java, demangle the name before doing a lookup, so |
| 1204 | we can always binary search. */ |
| 1205 | if (lang == language_cplus) |
| 1206 | { |
| 1207 | demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS); |
| 1208 | if (demangled_name) |
| 1209 | { |
| 1210 | mangled_name = name; |
| 1211 | modified_name = demangled_name; |
| 1212 | make_cleanup (xfree, demangled_name); |
| 1213 | } |
| 1214 | else |
| 1215 | { |
| 1216 | /* If we were given a non-mangled name, canonicalize it |
| 1217 | according to the language (so far only for C++). */ |
| 1218 | demangled_name = cp_canonicalize_string (name); |
| 1219 | if (demangled_name) |
| 1220 | { |
| 1221 | modified_name = demangled_name; |
| 1222 | make_cleanup (xfree, demangled_name); |
| 1223 | } |
| 1224 | } |
| 1225 | } |
| 1226 | else if (lang == language_java) |
| 1227 | { |
| 1228 | demangled_name = cplus_demangle (name, |
| 1229 | DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA); |
| 1230 | if (demangled_name) |
| 1231 | { |
| 1232 | mangled_name = name; |
| 1233 | modified_name = demangled_name; |
| 1234 | make_cleanup (xfree, demangled_name); |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | if (case_sensitivity == case_sensitive_off) |
| 1239 | { |
| 1240 | char *copy; |
| 1241 | int len, i; |
| 1242 | |
| 1243 | len = strlen (name); |
| 1244 | copy = (char *) alloca (len + 1); |
| 1245 | for (i= 0; i < len; i++) |
| 1246 | copy[i] = tolower (name[i]); |
| 1247 | copy[len] = 0; |
| 1248 | modified_name = copy; |
| 1249 | } |
| 1250 | |
| 1251 | returnval = lookup_symbol_aux (modified_name, mangled_name, block, |
| 1252 | domain, lang, is_a_field_of_this); |
| 1253 | do_cleanups (cleanup); |
| 1254 | |
| 1255 | return returnval; |
| 1256 | } |
| 1257 | |
| 1258 | /* Behave like lookup_symbol_in_language, but performed with the |
| 1259 | current language. */ |
| 1260 | |
| 1261 | struct symbol * |
| 1262 | lookup_symbol (const char *name, const struct block *block, |
| 1263 | domain_enum domain, int *is_a_field_of_this) |
| 1264 | { |
| 1265 | return lookup_symbol_in_language (name, block, domain, |
| 1266 | current_language->la_language, |
| 1267 | is_a_field_of_this); |
| 1268 | } |
| 1269 | |
| 1270 | /* Behave like lookup_symbol except that NAME is the natural name |
| 1271 | of the symbol that we're looking for and, if LINKAGE_NAME is |
| 1272 | non-NULL, ensure that the symbol's linkage name matches as |
| 1273 | well. */ |
| 1274 | |
| 1275 | static struct symbol * |
| 1276 | lookup_symbol_aux (const char *name, const char *linkage_name, |
| 1277 | const struct block *block, const domain_enum domain, |
| 1278 | enum language language, int *is_a_field_of_this) |
| 1279 | { |
| 1280 | struct symbol *sym; |
| 1281 | const struct language_defn *langdef; |
| 1282 | |
| 1283 | /* Make sure we do something sensible with is_a_field_of_this, since |
| 1284 | the callers that set this parameter to some non-null value will |
| 1285 | certainly use it later and expect it to be either 0 or 1. |
| 1286 | If we don't set it, the contents of is_a_field_of_this are |
| 1287 | undefined. */ |
| 1288 | if (is_a_field_of_this != NULL) |
| 1289 | *is_a_field_of_this = 0; |
| 1290 | |
| 1291 | /* Search specified block and its superiors. Don't search |
| 1292 | STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 1293 | |
| 1294 | sym = lookup_symbol_aux_local (name, linkage_name, block, domain); |
| 1295 | if (sym != NULL) |
| 1296 | return sym; |
| 1297 | |
| 1298 | /* If requested to do so by the caller and if appropriate for LANGUAGE, |
| 1299 | check to see if NAME is a field of `this'. */ |
| 1300 | |
| 1301 | langdef = language_def (language); |
| 1302 | |
| 1303 | if (langdef->la_name_of_this != NULL && is_a_field_of_this != NULL |
| 1304 | && block != NULL) |
| 1305 | { |
| 1306 | struct symbol *sym = NULL; |
| 1307 | /* 'this' is only defined in the function's block, so find the |
| 1308 | enclosing function block. */ |
| 1309 | for (; block && !BLOCK_FUNCTION (block); |
| 1310 | block = BLOCK_SUPERBLOCK (block)); |
| 1311 | |
| 1312 | if (block && !dict_empty (BLOCK_DICT (block))) |
| 1313 | sym = lookup_block_symbol (block, langdef->la_name_of_this, |
| 1314 | NULL, VAR_DOMAIN); |
| 1315 | if (sym) |
| 1316 | { |
| 1317 | struct type *t = sym->type; |
| 1318 | |
| 1319 | /* I'm not really sure that type of this can ever |
| 1320 | be typedefed; just be safe. */ |
| 1321 | CHECK_TYPEDEF (t); |
| 1322 | if (TYPE_CODE (t) == TYPE_CODE_PTR |
| 1323 | || TYPE_CODE (t) == TYPE_CODE_REF) |
| 1324 | t = TYPE_TARGET_TYPE (t); |
| 1325 | |
| 1326 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
| 1327 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
| 1328 | error (_("Internal error: `%s' is not an aggregate"), |
| 1329 | langdef->la_name_of_this); |
| 1330 | |
| 1331 | if (check_field (t, name)) |
| 1332 | { |
| 1333 | *is_a_field_of_this = 1; |
| 1334 | return NULL; |
| 1335 | } |
| 1336 | } |
| 1337 | } |
| 1338 | |
| 1339 | /* Now do whatever is appropriate for LANGUAGE to look |
| 1340 | up static and global variables. */ |
| 1341 | |
| 1342 | sym = langdef->la_lookup_symbol_nonlocal (name, linkage_name, block, domain); |
| 1343 | if (sym != NULL) |
| 1344 | return sym; |
| 1345 | |
| 1346 | /* Now search all static file-level symbols. Not strictly correct, |
| 1347 | but more useful than an error. Do the symtabs first, then check |
| 1348 | the psymtabs. If a psymtab indicates the existence of the |
| 1349 | desired name as a file-level static, then do psymtab-to-symtab |
| 1350 | conversion on the fly and return the found symbol. */ |
| 1351 | |
| 1352 | sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name, domain); |
| 1353 | if (sym != NULL) |
| 1354 | return sym; |
| 1355 | |
| 1356 | sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name, domain); |
| 1357 | if (sym != NULL) |
| 1358 | return sym; |
| 1359 | |
| 1360 | return NULL; |
| 1361 | } |
| 1362 | |
| 1363 | /* Check to see if the symbol is defined in BLOCK or its superiors. |
| 1364 | Don't search STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 1365 | |
| 1366 | static struct symbol * |
| 1367 | lookup_symbol_aux_local (const char *name, const char *linkage_name, |
| 1368 | const struct block *block, |
| 1369 | const domain_enum domain) |
| 1370 | { |
| 1371 | struct symbol *sym; |
| 1372 | const struct block *static_block = block_static_block (block); |
| 1373 | |
| 1374 | /* Check if either no block is specified or it's a global block. */ |
| 1375 | |
| 1376 | if (static_block == NULL) |
| 1377 | return NULL; |
| 1378 | |
| 1379 | while (block != static_block) |
| 1380 | { |
| 1381 | sym = lookup_symbol_aux_block (name, linkage_name, block, domain); |
| 1382 | if (sym != NULL) |
| 1383 | return sym; |
| 1384 | |
| 1385 | if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block)) |
| 1386 | break; |
| 1387 | block = BLOCK_SUPERBLOCK (block); |
| 1388 | } |
| 1389 | |
| 1390 | /* We've reached the edge of the function without finding a result. */ |
| 1391 | |
| 1392 | return NULL; |
| 1393 | } |
| 1394 | |
| 1395 | /* Look up OBJFILE to BLOCK. */ |
| 1396 | |
| 1397 | static struct objfile * |
| 1398 | lookup_objfile_from_block (const struct block *block) |
| 1399 | { |
| 1400 | struct objfile *obj; |
| 1401 | struct symtab *s; |
| 1402 | |
| 1403 | if (block == NULL) |
| 1404 | return NULL; |
| 1405 | |
| 1406 | block = block_global_block (block); |
| 1407 | /* Go through SYMTABS. */ |
| 1408 | ALL_SYMTABS (obj, s) |
| 1409 | if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK)) |
| 1410 | return obj; |
| 1411 | |
| 1412 | return NULL; |
| 1413 | } |
| 1414 | |
| 1415 | /* Look up a symbol in a block; if found, fixup the symbol, and set |
| 1416 | block_found appropriately. */ |
| 1417 | |
| 1418 | struct symbol * |
| 1419 | lookup_symbol_aux_block (const char *name, const char *linkage_name, |
| 1420 | const struct block *block, |
| 1421 | const domain_enum domain) |
| 1422 | { |
| 1423 | struct symbol *sym; |
| 1424 | |
| 1425 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1426 | if (sym) |
| 1427 | { |
| 1428 | block_found = block; |
| 1429 | return fixup_symbol_section (sym, NULL); |
| 1430 | } |
| 1431 | |
| 1432 | return NULL; |
| 1433 | } |
| 1434 | |
| 1435 | /* Check all global symbols in OBJFILE in symtabs and |
| 1436 | psymtabs. */ |
| 1437 | |
| 1438 | struct symbol * |
| 1439 | lookup_global_symbol_from_objfile (const struct objfile *objfile, |
| 1440 | const char *name, |
| 1441 | const char *linkage_name, |
| 1442 | const domain_enum domain) |
| 1443 | { |
| 1444 | struct symbol *sym; |
| 1445 | struct blockvector *bv; |
| 1446 | const struct block *block; |
| 1447 | struct symtab *s; |
| 1448 | struct partial_symtab *ps; |
| 1449 | |
| 1450 | /* Go through symtabs. */ |
| 1451 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 1452 | { |
| 1453 | bv = BLOCKVECTOR (s); |
| 1454 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1455 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1456 | if (sym) |
| 1457 | { |
| 1458 | block_found = block; |
| 1459 | return fixup_symbol_section (sym, (struct objfile *)objfile); |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | /* Now go through psymtabs. */ |
| 1464 | ALL_OBJFILE_PSYMTABS (objfile, ps) |
| 1465 | { |
| 1466 | if (!ps->readin |
| 1467 | && lookup_partial_symbol (ps, name, linkage_name, |
| 1468 | 1, domain)) |
| 1469 | { |
| 1470 | s = PSYMTAB_TO_SYMTAB (ps); |
| 1471 | bv = BLOCKVECTOR (s); |
| 1472 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1473 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1474 | return fixup_symbol_section (sym, (struct objfile *)objfile); |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | if (objfile->separate_debug_objfile) |
| 1479 | return lookup_global_symbol_from_objfile (objfile->separate_debug_objfile, |
| 1480 | name, linkage_name, domain); |
| 1481 | |
| 1482 | return NULL; |
| 1483 | } |
| 1484 | |
| 1485 | /* Check to see if the symbol is defined in one of the symtabs. |
| 1486 | BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK, |
| 1487 | depending on whether or not we want to search global symbols or |
| 1488 | static symbols. */ |
| 1489 | |
| 1490 | static struct symbol * |
| 1491 | lookup_symbol_aux_symtabs (int block_index, |
| 1492 | const char *name, const char *linkage_name, |
| 1493 | const domain_enum domain) |
| 1494 | { |
| 1495 | struct symbol *sym; |
| 1496 | struct objfile *objfile; |
| 1497 | struct blockvector *bv; |
| 1498 | const struct block *block; |
| 1499 | struct symtab *s; |
| 1500 | |
| 1501 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 1502 | { |
| 1503 | bv = BLOCKVECTOR (s); |
| 1504 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 1505 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1506 | if (sym) |
| 1507 | { |
| 1508 | block_found = block; |
| 1509 | return fixup_symbol_section (sym, objfile); |
| 1510 | } |
| 1511 | } |
| 1512 | |
| 1513 | return NULL; |
| 1514 | } |
| 1515 | |
| 1516 | /* Check to see if the symbol is defined in one of the partial |
| 1517 | symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or |
| 1518 | STATIC_BLOCK, depending on whether or not we want to search global |
| 1519 | symbols or static symbols. */ |
| 1520 | |
| 1521 | static struct symbol * |
| 1522 | lookup_symbol_aux_psymtabs (int block_index, const char *name, |
| 1523 | const char *linkage_name, |
| 1524 | const domain_enum domain) |
| 1525 | { |
| 1526 | struct symbol *sym; |
| 1527 | struct objfile *objfile; |
| 1528 | struct blockvector *bv; |
| 1529 | const struct block *block; |
| 1530 | struct partial_symtab *ps; |
| 1531 | struct symtab *s; |
| 1532 | const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0); |
| 1533 | |
| 1534 | ALL_PSYMTABS (objfile, ps) |
| 1535 | { |
| 1536 | if (!ps->readin |
| 1537 | && lookup_partial_symbol (ps, name, linkage_name, |
| 1538 | psymtab_index, domain)) |
| 1539 | { |
| 1540 | s = PSYMTAB_TO_SYMTAB (ps); |
| 1541 | bv = BLOCKVECTOR (s); |
| 1542 | block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 1543 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1544 | if (!sym) |
| 1545 | { |
| 1546 | /* This shouldn't be necessary, but as a last resort try |
| 1547 | looking in the statics even though the psymtab claimed |
| 1548 | the symbol was global, or vice-versa. It's possible |
| 1549 | that the psymtab gets it wrong in some cases. */ |
| 1550 | |
| 1551 | /* FIXME: carlton/2002-09-30: Should we really do that? |
| 1552 | If that happens, isn't it likely to be a GDB error, in |
| 1553 | which case we should fix the GDB error rather than |
| 1554 | silently dealing with it here? So I'd vote for |
| 1555 | removing the check for the symbol in the other |
| 1556 | block. */ |
| 1557 | block = BLOCKVECTOR_BLOCK (bv, |
| 1558 | block_index == GLOBAL_BLOCK ? |
| 1559 | STATIC_BLOCK : GLOBAL_BLOCK); |
| 1560 | sym = lookup_block_symbol (block, name, linkage_name, domain); |
| 1561 | if (!sym) |
| 1562 | error (_("Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n%s may be an inlined function, or may be a template function\n(if a template, try specifying an instantiation: %s<type>)."), |
| 1563 | block_index == GLOBAL_BLOCK ? "global" : "static", |
| 1564 | name, ps->filename, name, name); |
| 1565 | } |
| 1566 | return fixup_symbol_section (sym, objfile); |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | return NULL; |
| 1571 | } |
| 1572 | |
| 1573 | /* A default version of lookup_symbol_nonlocal for use by languages |
| 1574 | that can't think of anything better to do. This implements the C |
| 1575 | lookup rules. */ |
| 1576 | |
| 1577 | struct symbol * |
| 1578 | basic_lookup_symbol_nonlocal (const char *name, |
| 1579 | const char *linkage_name, |
| 1580 | const struct block *block, |
| 1581 | const domain_enum domain) |
| 1582 | { |
| 1583 | struct symbol *sym; |
| 1584 | |
| 1585 | /* NOTE: carlton/2003-05-19: The comments below were written when |
| 1586 | this (or what turned into this) was part of lookup_symbol_aux; |
| 1587 | I'm much less worried about these questions now, since these |
| 1588 | decisions have turned out well, but I leave these comments here |
| 1589 | for posterity. */ |
| 1590 | |
| 1591 | /* NOTE: carlton/2002-12-05: There is a question as to whether or |
| 1592 | not it would be appropriate to search the current global block |
| 1593 | here as well. (That's what this code used to do before the |
| 1594 | is_a_field_of_this check was moved up.) On the one hand, it's |
| 1595 | redundant with the lookup_symbol_aux_symtabs search that happens |
| 1596 | next. On the other hand, if decode_line_1 is passed an argument |
| 1597 | like filename:var, then the user presumably wants 'var' to be |
| 1598 | searched for in filename. On the third hand, there shouldn't be |
| 1599 | multiple global variables all of which are named 'var', and it's |
| 1600 | not like decode_line_1 has ever restricted its search to only |
| 1601 | global variables in a single filename. All in all, only |
| 1602 | searching the static block here seems best: it's correct and it's |
| 1603 | cleanest. */ |
| 1604 | |
| 1605 | /* NOTE: carlton/2002-12-05: There's also a possible performance |
| 1606 | issue here: if you usually search for global symbols in the |
| 1607 | current file, then it would be slightly better to search the |
| 1608 | current global block before searching all the symtabs. But there |
| 1609 | are other factors that have a much greater effect on performance |
| 1610 | than that one, so I don't think we should worry about that for |
| 1611 | now. */ |
| 1612 | |
| 1613 | sym = lookup_symbol_static (name, linkage_name, block, domain); |
| 1614 | if (sym != NULL) |
| 1615 | return sym; |
| 1616 | |
| 1617 | return lookup_symbol_global (name, linkage_name, block, domain); |
| 1618 | } |
| 1619 | |
| 1620 | /* Lookup a symbol in the static block associated to BLOCK, if there |
| 1621 | is one; do nothing if BLOCK is NULL or a global block. */ |
| 1622 | |
| 1623 | struct symbol * |
| 1624 | lookup_symbol_static (const char *name, |
| 1625 | const char *linkage_name, |
| 1626 | const struct block *block, |
| 1627 | const domain_enum domain) |
| 1628 | { |
| 1629 | const struct block *static_block = block_static_block (block); |
| 1630 | |
| 1631 | if (static_block != NULL) |
| 1632 | return lookup_symbol_aux_block (name, linkage_name, static_block, domain); |
| 1633 | else |
| 1634 | return NULL; |
| 1635 | } |
| 1636 | |
| 1637 | /* Lookup a symbol in all files' global blocks (searching psymtabs if |
| 1638 | necessary). */ |
| 1639 | |
| 1640 | struct symbol * |
| 1641 | lookup_symbol_global (const char *name, |
| 1642 | const char *linkage_name, |
| 1643 | const struct block *block, |
| 1644 | const domain_enum domain) |
| 1645 | { |
| 1646 | struct symbol *sym = NULL; |
| 1647 | struct objfile *objfile = NULL; |
| 1648 | |
| 1649 | /* Call library-specific lookup procedure. */ |
| 1650 | objfile = lookup_objfile_from_block (block); |
| 1651 | if (objfile != NULL) |
| 1652 | sym = solib_global_lookup (objfile, name, linkage_name, domain); |
| 1653 | if (sym != NULL) |
| 1654 | return sym; |
| 1655 | |
| 1656 | sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name, domain); |
| 1657 | if (sym != NULL) |
| 1658 | return sym; |
| 1659 | |
| 1660 | return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name, domain); |
| 1661 | } |
| 1662 | |
| 1663 | int |
| 1664 | symbol_matches_domain (enum language symbol_language, |
| 1665 | domain_enum symbol_domain, |
| 1666 | domain_enum domain) |
| 1667 | { |
| 1668 | /* For C++ "struct foo { ... }" also defines a typedef for "foo". |
| 1669 | A Java class declaration also defines a typedef for the class. |
| 1670 | Similarly, any Ada type declaration implicitly defines a typedef. */ |
| 1671 | if (symbol_language == language_cplus |
| 1672 | || symbol_language == language_java |
| 1673 | || symbol_language == language_ada) |
| 1674 | { |
| 1675 | if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN) |
| 1676 | && symbol_domain == STRUCT_DOMAIN) |
| 1677 | return 1; |
| 1678 | } |
| 1679 | /* For all other languages, strict match is required. */ |
| 1680 | return (symbol_domain == domain); |
| 1681 | } |
| 1682 | |
| 1683 | /* Look, in partial_symtab PST, for symbol whose natural name is NAME. |
| 1684 | If LINKAGE_NAME is non-NULL, check in addition that the symbol's |
| 1685 | linkage name matches it. Check the global symbols if GLOBAL, the |
| 1686 | static symbols if not */ |
| 1687 | |
| 1688 | struct partial_symbol * |
| 1689 | lookup_partial_symbol (struct partial_symtab *pst, const char *name, |
| 1690 | const char *linkage_name, int global, |
| 1691 | domain_enum domain) |
| 1692 | { |
| 1693 | struct partial_symbol *temp; |
| 1694 | struct partial_symbol **start, **psym; |
| 1695 | struct partial_symbol **top, **real_top, **bottom, **center; |
| 1696 | int length = (global ? pst->n_global_syms : pst->n_static_syms); |
| 1697 | int do_linear_search = 1; |
| 1698 | |
| 1699 | if (length == 0) |
| 1700 | { |
| 1701 | return (NULL); |
| 1702 | } |
| 1703 | start = (global ? |
| 1704 | pst->objfile->global_psymbols.list + pst->globals_offset : |
| 1705 | pst->objfile->static_psymbols.list + pst->statics_offset); |
| 1706 | |
| 1707 | if (global) /* This means we can use a binary search. */ |
| 1708 | { |
| 1709 | do_linear_search = 0; |
| 1710 | |
| 1711 | /* Binary search. This search is guaranteed to end with center |
| 1712 | pointing at the earliest partial symbol whose name might be |
| 1713 | correct. At that point *all* partial symbols with an |
| 1714 | appropriate name will be checked against the correct |
| 1715 | domain. */ |
| 1716 | |
| 1717 | bottom = start; |
| 1718 | top = start + length - 1; |
| 1719 | real_top = top; |
| 1720 | while (top > bottom) |
| 1721 | { |
| 1722 | center = bottom + (top - bottom) / 2; |
| 1723 | if (!(center < top)) |
| 1724 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 1725 | if (!do_linear_search |
| 1726 | && (SYMBOL_LANGUAGE (*center) == language_java)) |
| 1727 | { |
| 1728 | do_linear_search = 1; |
| 1729 | } |
| 1730 | if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center), name) >= 0) |
| 1731 | { |
| 1732 | top = center; |
| 1733 | } |
| 1734 | else |
| 1735 | { |
| 1736 | bottom = center + 1; |
| 1737 | } |
| 1738 | } |
| 1739 | if (!(top == bottom)) |
| 1740 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 1741 | |
| 1742 | while (top <= real_top |
| 1743 | && (linkage_name != NULL |
| 1744 | ? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0 |
| 1745 | : SYMBOL_MATCHES_SEARCH_NAME (*top,name))) |
| 1746 | { |
| 1747 | if (symbol_matches_domain (SYMBOL_LANGUAGE (*top), |
| 1748 | SYMBOL_DOMAIN (*top), domain)) |
| 1749 | return (*top); |
| 1750 | top++; |
| 1751 | } |
| 1752 | } |
| 1753 | |
| 1754 | /* Can't use a binary search or else we found during the binary search that |
| 1755 | we should also do a linear search. */ |
| 1756 | |
| 1757 | if (do_linear_search) |
| 1758 | { |
| 1759 | for (psym = start; psym < start + length; psym++) |
| 1760 | { |
| 1761 | if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym), |
| 1762 | SYMBOL_DOMAIN (*psym), domain)) |
| 1763 | { |
| 1764 | if (linkage_name != NULL |
| 1765 | ? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0 |
| 1766 | : SYMBOL_MATCHES_SEARCH_NAME (*psym, name)) |
| 1767 | { |
| 1768 | return (*psym); |
| 1769 | } |
| 1770 | } |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | return (NULL); |
| 1775 | } |
| 1776 | |
| 1777 | /* Look up a type named NAME in the struct_domain. The type returned |
| 1778 | must not be opaque -- i.e., must have at least one field |
| 1779 | defined. */ |
| 1780 | |
| 1781 | struct type * |
| 1782 | lookup_transparent_type (const char *name) |
| 1783 | { |
| 1784 | return current_language->la_lookup_transparent_type (name); |
| 1785 | } |
| 1786 | |
| 1787 | /* The standard implementation of lookup_transparent_type. This code |
| 1788 | was modeled on lookup_symbol -- the parts not relevant to looking |
| 1789 | up types were just left out. In particular it's assumed here that |
| 1790 | types are available in struct_domain and only at file-static or |
| 1791 | global blocks. */ |
| 1792 | |
| 1793 | struct type * |
| 1794 | basic_lookup_transparent_type (const char *name) |
| 1795 | { |
| 1796 | struct symbol *sym; |
| 1797 | struct symtab *s = NULL; |
| 1798 | struct partial_symtab *ps; |
| 1799 | struct blockvector *bv; |
| 1800 | struct objfile *objfile; |
| 1801 | struct block *block; |
| 1802 | |
| 1803 | /* Now search all the global symbols. Do the symtab's first, then |
| 1804 | check the psymtab's. If a psymtab indicates the existence |
| 1805 | of the desired name as a global, then do psymtab-to-symtab |
| 1806 | conversion on the fly and return the found symbol. */ |
| 1807 | |
| 1808 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 1809 | { |
| 1810 | bv = BLOCKVECTOR (s); |
| 1811 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1812 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1813 | if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 1814 | { |
| 1815 | return SYMBOL_TYPE (sym); |
| 1816 | } |
| 1817 | } |
| 1818 | |
| 1819 | ALL_PSYMTABS (objfile, ps) |
| 1820 | { |
| 1821 | if (!ps->readin && lookup_partial_symbol (ps, name, NULL, |
| 1822 | 1, STRUCT_DOMAIN)) |
| 1823 | { |
| 1824 | s = PSYMTAB_TO_SYMTAB (ps); |
| 1825 | bv = BLOCKVECTOR (s); |
| 1826 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1827 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1828 | if (!sym) |
| 1829 | { |
| 1830 | /* This shouldn't be necessary, but as a last resort |
| 1831 | * try looking in the statics even though the psymtab |
| 1832 | * claimed the symbol was global. It's possible that |
| 1833 | * the psymtab gets it wrong in some cases. |
| 1834 | */ |
| 1835 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 1836 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1837 | if (!sym) |
| 1838 | error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\ |
| 1839 | %s may be an inlined function, or may be a template function\n\ |
| 1840 | (if a template, try specifying an instantiation: %s<type>)."), |
| 1841 | name, ps->filename, name, name); |
| 1842 | } |
| 1843 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 1844 | return SYMBOL_TYPE (sym); |
| 1845 | } |
| 1846 | } |
| 1847 | |
| 1848 | /* Now search the static file-level symbols. |
| 1849 | Not strictly correct, but more useful than an error. |
| 1850 | Do the symtab's first, then |
| 1851 | check the psymtab's. If a psymtab indicates the existence |
| 1852 | of the desired name as a file-level static, then do psymtab-to-symtab |
| 1853 | conversion on the fly and return the found symbol. |
| 1854 | */ |
| 1855 | |
| 1856 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 1857 | { |
| 1858 | bv = BLOCKVECTOR (s); |
| 1859 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 1860 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1861 | if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 1862 | { |
| 1863 | return SYMBOL_TYPE (sym); |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | ALL_PSYMTABS (objfile, ps) |
| 1868 | { |
| 1869 | if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN)) |
| 1870 | { |
| 1871 | s = PSYMTAB_TO_SYMTAB (ps); |
| 1872 | bv = BLOCKVECTOR (s); |
| 1873 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 1874 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1875 | if (!sym) |
| 1876 | { |
| 1877 | /* This shouldn't be necessary, but as a last resort |
| 1878 | * try looking in the globals even though the psymtab |
| 1879 | * claimed the symbol was static. It's possible that |
| 1880 | * the psymtab gets it wrong in some cases. |
| 1881 | */ |
| 1882 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1883 | sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN); |
| 1884 | if (!sym) |
| 1885 | error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\ |
| 1886 | %s may be an inlined function, or may be a template function\n\ |
| 1887 | (if a template, try specifying an instantiation: %s<type>)."), |
| 1888 | name, ps->filename, name, name); |
| 1889 | } |
| 1890 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) |
| 1891 | return SYMBOL_TYPE (sym); |
| 1892 | } |
| 1893 | } |
| 1894 | return (struct type *) 0; |
| 1895 | } |
| 1896 | |
| 1897 | |
| 1898 | /* Find the psymtab containing main(). */ |
| 1899 | /* FIXME: What about languages without main() or specially linked |
| 1900 | executables that have no main() ? */ |
| 1901 | |
| 1902 | struct partial_symtab * |
| 1903 | find_main_psymtab (void) |
| 1904 | { |
| 1905 | struct partial_symtab *pst; |
| 1906 | struct objfile *objfile; |
| 1907 | |
| 1908 | ALL_PSYMTABS (objfile, pst) |
| 1909 | { |
| 1910 | if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN)) |
| 1911 | { |
| 1912 | return (pst); |
| 1913 | } |
| 1914 | } |
| 1915 | return (NULL); |
| 1916 | } |
| 1917 | |
| 1918 | /* Search BLOCK for symbol NAME in DOMAIN. |
| 1919 | |
| 1920 | Note that if NAME is the demangled form of a C++ symbol, we will fail |
| 1921 | to find a match during the binary search of the non-encoded names, but |
| 1922 | for now we don't worry about the slight inefficiency of looking for |
| 1923 | a match we'll never find, since it will go pretty quick. Once the |
| 1924 | binary search terminates, we drop through and do a straight linear |
| 1925 | search on the symbols. Each symbol which is marked as being a ObjC/C++ |
| 1926 | symbol (language_cplus or language_objc set) has both the encoded and |
| 1927 | non-encoded names tested for a match. |
| 1928 | |
| 1929 | If LINKAGE_NAME is non-NULL, verify that any symbol we find has this |
| 1930 | particular mangled name. |
| 1931 | */ |
| 1932 | |
| 1933 | struct symbol * |
| 1934 | lookup_block_symbol (const struct block *block, const char *name, |
| 1935 | const char *linkage_name, |
| 1936 | const domain_enum domain) |
| 1937 | { |
| 1938 | struct dict_iterator iter; |
| 1939 | struct symbol *sym; |
| 1940 | |
| 1941 | if (!BLOCK_FUNCTION (block)) |
| 1942 | { |
| 1943 | for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter); |
| 1944 | sym != NULL; |
| 1945 | sym = dict_iter_name_next (name, &iter)) |
| 1946 | { |
| 1947 | if (symbol_matches_domain (SYMBOL_LANGUAGE (sym), |
| 1948 | SYMBOL_DOMAIN (sym), domain) |
| 1949 | && (linkage_name != NULL |
| 1950 | ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1)) |
| 1951 | return sym; |
| 1952 | } |
| 1953 | return NULL; |
| 1954 | } |
| 1955 | else |
| 1956 | { |
| 1957 | /* Note that parameter symbols do not always show up last in the |
| 1958 | list; this loop makes sure to take anything else other than |
| 1959 | parameter symbols first; it only uses parameter symbols as a |
| 1960 | last resort. Note that this only takes up extra computation |
| 1961 | time on a match. */ |
| 1962 | |
| 1963 | struct symbol *sym_found = NULL; |
| 1964 | |
| 1965 | for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter); |
| 1966 | sym != NULL; |
| 1967 | sym = dict_iter_name_next (name, &iter)) |
| 1968 | { |
| 1969 | if (symbol_matches_domain (SYMBOL_LANGUAGE (sym), |
| 1970 | SYMBOL_DOMAIN (sym), domain) |
| 1971 | && (linkage_name != NULL |
| 1972 | ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1)) |
| 1973 | { |
| 1974 | sym_found = sym; |
| 1975 | if (!SYMBOL_IS_ARGUMENT (sym)) |
| 1976 | { |
| 1977 | break; |
| 1978 | } |
| 1979 | } |
| 1980 | } |
| 1981 | return (sym_found); /* Will be NULL if not found. */ |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | /* Find the symtab associated with PC and SECTION. Look through the |
| 1986 | psymtabs and read in another symtab if necessary. */ |
| 1987 | |
| 1988 | struct symtab * |
| 1989 | find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section) |
| 1990 | { |
| 1991 | struct block *b; |
| 1992 | struct blockvector *bv; |
| 1993 | struct symtab *s = NULL; |
| 1994 | struct symtab *best_s = NULL; |
| 1995 | struct partial_symtab *ps; |
| 1996 | struct objfile *objfile; |
| 1997 | CORE_ADDR distance = 0; |
| 1998 | struct minimal_symbol *msymbol; |
| 1999 | |
| 2000 | /* If we know that this is not a text address, return failure. This is |
| 2001 | necessary because we loop based on the block's high and low code |
| 2002 | addresses, which do not include the data ranges, and because |
| 2003 | we call find_pc_sect_psymtab which has a similar restriction based |
| 2004 | on the partial_symtab's texthigh and textlow. */ |
| 2005 | msymbol = lookup_minimal_symbol_by_pc_section (pc, section); |
| 2006 | if (msymbol |
| 2007 | && (MSYMBOL_TYPE (msymbol) == mst_data |
| 2008 | || MSYMBOL_TYPE (msymbol) == mst_bss |
| 2009 | || MSYMBOL_TYPE (msymbol) == mst_abs |
| 2010 | || MSYMBOL_TYPE (msymbol) == mst_file_data |
| 2011 | || MSYMBOL_TYPE (msymbol) == mst_file_bss)) |
| 2012 | return NULL; |
| 2013 | |
| 2014 | /* Search all symtabs for the one whose file contains our address, and which |
| 2015 | is the smallest of all the ones containing the address. This is designed |
| 2016 | to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000 |
| 2017 | and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from |
| 2018 | 0x1000-0x4000, but for address 0x2345 we want to return symtab b. |
| 2019 | |
| 2020 | This happens for native ecoff format, where code from included files |
| 2021 | gets its own symtab. The symtab for the included file should have |
| 2022 | been read in already via the dependency mechanism. |
| 2023 | It might be swifter to create several symtabs with the same name |
| 2024 | like xcoff does (I'm not sure). |
| 2025 | |
| 2026 | It also happens for objfiles that have their functions reordered. |
| 2027 | For these, the symtab we are looking for is not necessarily read in. */ |
| 2028 | |
| 2029 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 2030 | { |
| 2031 | bv = BLOCKVECTOR (s); |
| 2032 | b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 2033 | |
| 2034 | if (BLOCK_START (b) <= pc |
| 2035 | && BLOCK_END (b) > pc |
| 2036 | && (distance == 0 |
| 2037 | || BLOCK_END (b) - BLOCK_START (b) < distance)) |
| 2038 | { |
| 2039 | /* For an objfile that has its functions reordered, |
| 2040 | find_pc_psymtab will find the proper partial symbol table |
| 2041 | and we simply return its corresponding symtab. */ |
| 2042 | /* In order to better support objfiles that contain both |
| 2043 | stabs and coff debugging info, we continue on if a psymtab |
| 2044 | can't be found. */ |
| 2045 | if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs) |
| 2046 | { |
| 2047 | ps = find_pc_sect_psymtab (pc, section); |
| 2048 | if (ps) |
| 2049 | return PSYMTAB_TO_SYMTAB (ps); |
| 2050 | } |
| 2051 | if (section != 0) |
| 2052 | { |
| 2053 | struct dict_iterator iter; |
| 2054 | struct symbol *sym = NULL; |
| 2055 | |
| 2056 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 2057 | { |
| 2058 | fixup_symbol_section (sym, objfile); |
| 2059 | if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section)) |
| 2060 | break; |
| 2061 | } |
| 2062 | if (sym == NULL) |
| 2063 | continue; /* no symbol in this symtab matches section */ |
| 2064 | } |
| 2065 | distance = BLOCK_END (b) - BLOCK_START (b); |
| 2066 | best_s = s; |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | if (best_s != NULL) |
| 2071 | return (best_s); |
| 2072 | |
| 2073 | s = NULL; |
| 2074 | ps = find_pc_sect_psymtab (pc, section); |
| 2075 | if (ps) |
| 2076 | { |
| 2077 | if (ps->readin) |
| 2078 | /* Might want to error() here (in case symtab is corrupt and |
| 2079 | will cause a core dump), but maybe we can successfully |
| 2080 | continue, so let's not. */ |
| 2081 | warning (_("\ |
| 2082 | (Internal error: pc %s in read in psymtab, but not in symtab.)\n"), |
| 2083 | paddress (get_objfile_arch (ps->objfile), pc)); |
| 2084 | s = PSYMTAB_TO_SYMTAB (ps); |
| 2085 | } |
| 2086 | return (s); |
| 2087 | } |
| 2088 | |
| 2089 | /* Find the symtab associated with PC. Look through the psymtabs and |
| 2090 | read in another symtab if necessary. Backward compatibility, no section */ |
| 2091 | |
| 2092 | struct symtab * |
| 2093 | find_pc_symtab (CORE_ADDR pc) |
| 2094 | { |
| 2095 | return find_pc_sect_symtab (pc, find_pc_mapped_section (pc)); |
| 2096 | } |
| 2097 | \f |
| 2098 | |
| 2099 | /* Find the source file and line number for a given PC value and SECTION. |
| 2100 | Return a structure containing a symtab pointer, a line number, |
| 2101 | and a pc range for the entire source line. |
| 2102 | The value's .pc field is NOT the specified pc. |
| 2103 | NOTCURRENT nonzero means, if specified pc is on a line boundary, |
| 2104 | use the line that ends there. Otherwise, in that case, the line |
| 2105 | that begins there is used. */ |
| 2106 | |
| 2107 | /* The big complication here is that a line may start in one file, and end just |
| 2108 | before the start of another file. This usually occurs when you #include |
| 2109 | code in the middle of a subroutine. To properly find the end of a line's PC |
| 2110 | range, we must search all symtabs associated with this compilation unit, and |
| 2111 | find the one whose first PC is closer than that of the next line in this |
| 2112 | symtab. */ |
| 2113 | |
| 2114 | /* If it's worth the effort, we could be using a binary search. */ |
| 2115 | |
| 2116 | struct symtab_and_line |
| 2117 | find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent) |
| 2118 | { |
| 2119 | struct symtab *s; |
| 2120 | struct linetable *l; |
| 2121 | int len; |
| 2122 | int i; |
| 2123 | struct linetable_entry *item; |
| 2124 | struct symtab_and_line val; |
| 2125 | struct blockvector *bv; |
| 2126 | struct minimal_symbol *msymbol; |
| 2127 | struct minimal_symbol *mfunsym; |
| 2128 | |
| 2129 | /* Info on best line seen so far, and where it starts, and its file. */ |
| 2130 | |
| 2131 | struct linetable_entry *best = NULL; |
| 2132 | CORE_ADDR best_end = 0; |
| 2133 | struct symtab *best_symtab = 0; |
| 2134 | |
| 2135 | /* Store here the first line number |
| 2136 | of a file which contains the line at the smallest pc after PC. |
| 2137 | If we don't find a line whose range contains PC, |
| 2138 | we will use a line one less than this, |
| 2139 | with a range from the start of that file to the first line's pc. */ |
| 2140 | struct linetable_entry *alt = NULL; |
| 2141 | struct symtab *alt_symtab = 0; |
| 2142 | |
| 2143 | /* Info on best line seen in this file. */ |
| 2144 | |
| 2145 | struct linetable_entry *prev; |
| 2146 | |
| 2147 | /* If this pc is not from the current frame, |
| 2148 | it is the address of the end of a call instruction. |
| 2149 | Quite likely that is the start of the following statement. |
| 2150 | But what we want is the statement containing the instruction. |
| 2151 | Fudge the pc to make sure we get that. */ |
| 2152 | |
| 2153 | init_sal (&val); /* initialize to zeroes */ |
| 2154 | |
| 2155 | /* It's tempting to assume that, if we can't find debugging info for |
| 2156 | any function enclosing PC, that we shouldn't search for line |
| 2157 | number info, either. However, GAS can emit line number info for |
| 2158 | assembly files --- very helpful when debugging hand-written |
| 2159 | assembly code. In such a case, we'd have no debug info for the |
| 2160 | function, but we would have line info. */ |
| 2161 | |
| 2162 | if (notcurrent) |
| 2163 | pc -= 1; |
| 2164 | |
| 2165 | /* elz: added this because this function returned the wrong |
| 2166 | information if the pc belongs to a stub (import/export) |
| 2167 | to call a shlib function. This stub would be anywhere between |
| 2168 | two functions in the target, and the line info was erroneously |
| 2169 | taken to be the one of the line before the pc. |
| 2170 | */ |
| 2171 | /* RT: Further explanation: |
| 2172 | |
| 2173 | * We have stubs (trampolines) inserted between procedures. |
| 2174 | * |
| 2175 | * Example: "shr1" exists in a shared library, and a "shr1" stub also |
| 2176 | * exists in the main image. |
| 2177 | * |
| 2178 | * In the minimal symbol table, we have a bunch of symbols |
| 2179 | * sorted by start address. The stubs are marked as "trampoline", |
| 2180 | * the others appear as text. E.g.: |
| 2181 | * |
| 2182 | * Minimal symbol table for main image |
| 2183 | * main: code for main (text symbol) |
| 2184 | * shr1: stub (trampoline symbol) |
| 2185 | * foo: code for foo (text symbol) |
| 2186 | * ... |
| 2187 | * Minimal symbol table for "shr1" image: |
| 2188 | * ... |
| 2189 | * shr1: code for shr1 (text symbol) |
| 2190 | * ... |
| 2191 | * |
| 2192 | * So the code below is trying to detect if we are in the stub |
| 2193 | * ("shr1" stub), and if so, find the real code ("shr1" trampoline), |
| 2194 | * and if found, do the symbolization from the real-code address |
| 2195 | * rather than the stub address. |
| 2196 | * |
| 2197 | * Assumptions being made about the minimal symbol table: |
| 2198 | * 1. lookup_minimal_symbol_by_pc() will return a trampoline only |
| 2199 | * if we're really in the trampoline. If we're beyond it (say |
| 2200 | * we're in "foo" in the above example), it'll have a closer |
| 2201 | * symbol (the "foo" text symbol for example) and will not |
| 2202 | * return the trampoline. |
| 2203 | * 2. lookup_minimal_symbol_text() will find a real text symbol |
| 2204 | * corresponding to the trampoline, and whose address will |
| 2205 | * be different than the trampoline address. I put in a sanity |
| 2206 | * check for the address being the same, to avoid an |
| 2207 | * infinite recursion. |
| 2208 | */ |
| 2209 | msymbol = lookup_minimal_symbol_by_pc (pc); |
| 2210 | if (msymbol != NULL) |
| 2211 | if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline) |
| 2212 | { |
| 2213 | mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol), |
| 2214 | NULL); |
| 2215 | if (mfunsym == NULL) |
| 2216 | /* I eliminated this warning since it is coming out |
| 2217 | * in the following situation: |
| 2218 | * gdb shmain // test program with shared libraries |
| 2219 | * (gdb) break shr1 // function in shared lib |
| 2220 | * Warning: In stub for ... |
| 2221 | * In the above situation, the shared lib is not loaded yet, |
| 2222 | * so of course we can't find the real func/line info, |
| 2223 | * but the "break" still works, and the warning is annoying. |
| 2224 | * So I commented out the warning. RT */ |
| 2225 | /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ; |
| 2226 | /* fall through */ |
| 2227 | else if (SYMBOL_VALUE_ADDRESS (mfunsym) == SYMBOL_VALUE_ADDRESS (msymbol)) |
| 2228 | /* Avoid infinite recursion */ |
| 2229 | /* See above comment about why warning is commented out */ |
| 2230 | /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ; |
| 2231 | /* fall through */ |
| 2232 | else |
| 2233 | return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0); |
| 2234 | } |
| 2235 | |
| 2236 | |
| 2237 | s = find_pc_sect_symtab (pc, section); |
| 2238 | if (!s) |
| 2239 | { |
| 2240 | /* if no symbol information, return previous pc */ |
| 2241 | if (notcurrent) |
| 2242 | pc++; |
| 2243 | val.pc = pc; |
| 2244 | return val; |
| 2245 | } |
| 2246 | |
| 2247 | bv = BLOCKVECTOR (s); |
| 2248 | |
| 2249 | /* Look at all the symtabs that share this blockvector. |
| 2250 | They all have the same apriori range, that we found was right; |
| 2251 | but they have different line tables. */ |
| 2252 | |
| 2253 | for (; s && BLOCKVECTOR (s) == bv; s = s->next) |
| 2254 | { |
| 2255 | /* Find the best line in this symtab. */ |
| 2256 | l = LINETABLE (s); |
| 2257 | if (!l) |
| 2258 | continue; |
| 2259 | len = l->nitems; |
| 2260 | if (len <= 0) |
| 2261 | { |
| 2262 | /* I think len can be zero if the symtab lacks line numbers |
| 2263 | (e.g. gcc -g1). (Either that or the LINETABLE is NULL; |
| 2264 | I'm not sure which, and maybe it depends on the symbol |
| 2265 | reader). */ |
| 2266 | continue; |
| 2267 | } |
| 2268 | |
| 2269 | prev = NULL; |
| 2270 | item = l->item; /* Get first line info */ |
| 2271 | |
| 2272 | /* Is this file's first line closer than the first lines of other files? |
| 2273 | If so, record this file, and its first line, as best alternate. */ |
| 2274 | if (item->pc > pc && (!alt || item->pc < alt->pc)) |
| 2275 | { |
| 2276 | alt = item; |
| 2277 | alt_symtab = s; |
| 2278 | } |
| 2279 | |
| 2280 | for (i = 0; i < len; i++, item++) |
| 2281 | { |
| 2282 | /* Leave prev pointing to the linetable entry for the last line |
| 2283 | that started at or before PC. */ |
| 2284 | if (item->pc > pc) |
| 2285 | break; |
| 2286 | |
| 2287 | prev = item; |
| 2288 | } |
| 2289 | |
| 2290 | /* At this point, prev points at the line whose start addr is <= pc, and |
| 2291 | item points at the next line. If we ran off the end of the linetable |
| 2292 | (pc >= start of the last line), then prev == item. If pc < start of |
| 2293 | the first line, prev will not be set. */ |
| 2294 | |
| 2295 | /* Is this file's best line closer than the best in the other files? |
| 2296 | If so, record this file, and its best line, as best so far. Don't |
| 2297 | save prev if it represents the end of a function (i.e. line number |
| 2298 | 0) instead of a real line. */ |
| 2299 | |
| 2300 | if (prev && prev->line && (!best || prev->pc > best->pc)) |
| 2301 | { |
| 2302 | best = prev; |
| 2303 | best_symtab = s; |
| 2304 | |
| 2305 | /* Discard BEST_END if it's before the PC of the current BEST. */ |
| 2306 | if (best_end <= best->pc) |
| 2307 | best_end = 0; |
| 2308 | } |
| 2309 | |
| 2310 | /* If another line (denoted by ITEM) is in the linetable and its |
| 2311 | PC is after BEST's PC, but before the current BEST_END, then |
| 2312 | use ITEM's PC as the new best_end. */ |
| 2313 | if (best && i < len && item->pc > best->pc |
| 2314 | && (best_end == 0 || best_end > item->pc)) |
| 2315 | best_end = item->pc; |
| 2316 | } |
| 2317 | |
| 2318 | if (!best_symtab) |
| 2319 | { |
| 2320 | /* If we didn't find any line number info, just return zeros. |
| 2321 | We used to return alt->line - 1 here, but that could be |
| 2322 | anywhere; if we don't have line number info for this PC, |
| 2323 | don't make some up. */ |
| 2324 | val.pc = pc; |
| 2325 | } |
| 2326 | else if (best->line == 0) |
| 2327 | { |
| 2328 | /* If our best fit is in a range of PC's for which no line |
| 2329 | number info is available (line number is zero) then we didn't |
| 2330 | find any valid line information. */ |
| 2331 | val.pc = pc; |
| 2332 | } |
| 2333 | else |
| 2334 | { |
| 2335 | val.symtab = best_symtab; |
| 2336 | val.line = best->line; |
| 2337 | val.pc = best->pc; |
| 2338 | if (best_end && (!alt || best_end < alt->pc)) |
| 2339 | val.end = best_end; |
| 2340 | else if (alt) |
| 2341 | val.end = alt->pc; |
| 2342 | else |
| 2343 | val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); |
| 2344 | } |
| 2345 | val.section = section; |
| 2346 | return val; |
| 2347 | } |
| 2348 | |
| 2349 | /* Backward compatibility (no section) */ |
| 2350 | |
| 2351 | struct symtab_and_line |
| 2352 | find_pc_line (CORE_ADDR pc, int notcurrent) |
| 2353 | { |
| 2354 | struct obj_section *section; |
| 2355 | |
| 2356 | section = find_pc_overlay (pc); |
| 2357 | if (pc_in_unmapped_range (pc, section)) |
| 2358 | pc = overlay_mapped_address (pc, section); |
| 2359 | return find_pc_sect_line (pc, section, notcurrent); |
| 2360 | } |
| 2361 | \f |
| 2362 | /* Find line number LINE in any symtab whose name is the same as |
| 2363 | SYMTAB. |
| 2364 | |
| 2365 | If found, return the symtab that contains the linetable in which it was |
| 2366 | found, set *INDEX to the index in the linetable of the best entry |
| 2367 | found, and set *EXACT_MATCH nonzero if the value returned is an |
| 2368 | exact match. |
| 2369 | |
| 2370 | If not found, return NULL. */ |
| 2371 | |
| 2372 | struct symtab * |
| 2373 | find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match) |
| 2374 | { |
| 2375 | int exact = 0; /* Initialized here to avoid a compiler warning. */ |
| 2376 | |
| 2377 | /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE |
| 2378 | so far seen. */ |
| 2379 | |
| 2380 | int best_index; |
| 2381 | struct linetable *best_linetable; |
| 2382 | struct symtab *best_symtab; |
| 2383 | |
| 2384 | /* First try looking it up in the given symtab. */ |
| 2385 | best_linetable = LINETABLE (symtab); |
| 2386 | best_symtab = symtab; |
| 2387 | best_index = find_line_common (best_linetable, line, &exact); |
| 2388 | if (best_index < 0 || !exact) |
| 2389 | { |
| 2390 | /* Didn't find an exact match. So we better keep looking for |
| 2391 | another symtab with the same name. In the case of xcoff, |
| 2392 | multiple csects for one source file (produced by IBM's FORTRAN |
| 2393 | compiler) produce multiple symtabs (this is unavoidable |
| 2394 | assuming csects can be at arbitrary places in memory and that |
| 2395 | the GLOBAL_BLOCK of a symtab has a begin and end address). */ |
| 2396 | |
| 2397 | /* BEST is the smallest linenumber > LINE so far seen, |
| 2398 | or 0 if none has been seen so far. |
| 2399 | BEST_INDEX and BEST_LINETABLE identify the item for it. */ |
| 2400 | int best; |
| 2401 | |
| 2402 | struct objfile *objfile; |
| 2403 | struct symtab *s; |
| 2404 | struct partial_symtab *p; |
| 2405 | |
| 2406 | if (best_index >= 0) |
| 2407 | best = best_linetable->item[best_index].line; |
| 2408 | else |
| 2409 | best = 0; |
| 2410 | |
| 2411 | ALL_PSYMTABS (objfile, p) |
| 2412 | { |
| 2413 | if (strcmp (symtab->filename, p->filename) != 0) |
| 2414 | continue; |
| 2415 | PSYMTAB_TO_SYMTAB (p); |
| 2416 | } |
| 2417 | |
| 2418 | ALL_SYMTABS (objfile, s) |
| 2419 | { |
| 2420 | struct linetable *l; |
| 2421 | int ind; |
| 2422 | |
| 2423 | if (strcmp (symtab->filename, s->filename) != 0) |
| 2424 | continue; |
| 2425 | l = LINETABLE (s); |
| 2426 | ind = find_line_common (l, line, &exact); |
| 2427 | if (ind >= 0) |
| 2428 | { |
| 2429 | if (exact) |
| 2430 | { |
| 2431 | best_index = ind; |
| 2432 | best_linetable = l; |
| 2433 | best_symtab = s; |
| 2434 | goto done; |
| 2435 | } |
| 2436 | if (best == 0 || l->item[ind].line < best) |
| 2437 | { |
| 2438 | best = l->item[ind].line; |
| 2439 | best_index = ind; |
| 2440 | best_linetable = l; |
| 2441 | best_symtab = s; |
| 2442 | } |
| 2443 | } |
| 2444 | } |
| 2445 | } |
| 2446 | done: |
| 2447 | if (best_index < 0) |
| 2448 | return NULL; |
| 2449 | |
| 2450 | if (index) |
| 2451 | *index = best_index; |
| 2452 | if (exact_match) |
| 2453 | *exact_match = exact; |
| 2454 | |
| 2455 | return best_symtab; |
| 2456 | } |
| 2457 | \f |
| 2458 | /* Set the PC value for a given source file and line number and return true. |
| 2459 | Returns zero for invalid line number (and sets the PC to 0). |
| 2460 | The source file is specified with a struct symtab. */ |
| 2461 | |
| 2462 | int |
| 2463 | find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc) |
| 2464 | { |
| 2465 | struct linetable *l; |
| 2466 | int ind; |
| 2467 | |
| 2468 | *pc = 0; |
| 2469 | if (symtab == 0) |
| 2470 | return 0; |
| 2471 | |
| 2472 | symtab = find_line_symtab (symtab, line, &ind, NULL); |
| 2473 | if (symtab != NULL) |
| 2474 | { |
| 2475 | l = LINETABLE (symtab); |
| 2476 | *pc = l->item[ind].pc; |
| 2477 | return 1; |
| 2478 | } |
| 2479 | else |
| 2480 | return 0; |
| 2481 | } |
| 2482 | |
| 2483 | /* Find the range of pc values in a line. |
| 2484 | Store the starting pc of the line into *STARTPTR |
| 2485 | and the ending pc (start of next line) into *ENDPTR. |
| 2486 | Returns 1 to indicate success. |
| 2487 | Returns 0 if could not find the specified line. */ |
| 2488 | |
| 2489 | int |
| 2490 | find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr, |
| 2491 | CORE_ADDR *endptr) |
| 2492 | { |
| 2493 | CORE_ADDR startaddr; |
| 2494 | struct symtab_and_line found_sal; |
| 2495 | |
| 2496 | startaddr = sal.pc; |
| 2497 | if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr)) |
| 2498 | return 0; |
| 2499 | |
| 2500 | /* This whole function is based on address. For example, if line 10 has |
| 2501 | two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then |
| 2502 | "info line *0x123" should say the line goes from 0x100 to 0x200 |
| 2503 | and "info line *0x355" should say the line goes from 0x300 to 0x400. |
| 2504 | This also insures that we never give a range like "starts at 0x134 |
| 2505 | and ends at 0x12c". */ |
| 2506 | |
| 2507 | found_sal = find_pc_sect_line (startaddr, sal.section, 0); |
| 2508 | if (found_sal.line != sal.line) |
| 2509 | { |
| 2510 | /* The specified line (sal) has zero bytes. */ |
| 2511 | *startptr = found_sal.pc; |
| 2512 | *endptr = found_sal.pc; |
| 2513 | } |
| 2514 | else |
| 2515 | { |
| 2516 | *startptr = found_sal.pc; |
| 2517 | *endptr = found_sal.end; |
| 2518 | } |
| 2519 | return 1; |
| 2520 | } |
| 2521 | |
| 2522 | /* Given a line table and a line number, return the index into the line |
| 2523 | table for the pc of the nearest line whose number is >= the specified one. |
| 2524 | Return -1 if none is found. The value is >= 0 if it is an index. |
| 2525 | |
| 2526 | Set *EXACT_MATCH nonzero if the value returned is an exact match. */ |
| 2527 | |
| 2528 | static int |
| 2529 | find_line_common (struct linetable *l, int lineno, |
| 2530 | int *exact_match) |
| 2531 | { |
| 2532 | int i; |
| 2533 | int len; |
| 2534 | |
| 2535 | /* BEST is the smallest linenumber > LINENO so far seen, |
| 2536 | or 0 if none has been seen so far. |
| 2537 | BEST_INDEX identifies the item for it. */ |
| 2538 | |
| 2539 | int best_index = -1; |
| 2540 | int best = 0; |
| 2541 | |
| 2542 | *exact_match = 0; |
| 2543 | |
| 2544 | if (lineno <= 0) |
| 2545 | return -1; |
| 2546 | if (l == 0) |
| 2547 | return -1; |
| 2548 | |
| 2549 | len = l->nitems; |
| 2550 | for (i = 0; i < len; i++) |
| 2551 | { |
| 2552 | struct linetable_entry *item = &(l->item[i]); |
| 2553 | |
| 2554 | if (item->line == lineno) |
| 2555 | { |
| 2556 | /* Return the first (lowest address) entry which matches. */ |
| 2557 | *exact_match = 1; |
| 2558 | return i; |
| 2559 | } |
| 2560 | |
| 2561 | if (item->line > lineno && (best == 0 || item->line < best)) |
| 2562 | { |
| 2563 | best = item->line; |
| 2564 | best_index = i; |
| 2565 | } |
| 2566 | } |
| 2567 | |
| 2568 | /* If we got here, we didn't get an exact match. */ |
| 2569 | return best_index; |
| 2570 | } |
| 2571 | |
| 2572 | int |
| 2573 | find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr) |
| 2574 | { |
| 2575 | struct symtab_and_line sal; |
| 2576 | sal = find_pc_line (pc, 0); |
| 2577 | *startptr = sal.pc; |
| 2578 | *endptr = sal.end; |
| 2579 | return sal.symtab != 0; |
| 2580 | } |
| 2581 | |
| 2582 | /* Given a function start address PC and SECTION, find the first |
| 2583 | address after the function prologue. */ |
| 2584 | CORE_ADDR |
| 2585 | find_function_start_pc (struct gdbarch *gdbarch, |
| 2586 | CORE_ADDR pc, struct obj_section *section) |
| 2587 | { |
| 2588 | /* If the function is in an unmapped overlay, use its unmapped LMA address, |
| 2589 | so that gdbarch_skip_prologue has something unique to work on. */ |
| 2590 | if (section_is_overlay (section) && !section_is_mapped (section)) |
| 2591 | pc = overlay_unmapped_address (pc, section); |
| 2592 | |
| 2593 | pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 2594 | pc = gdbarch_skip_prologue (gdbarch, pc); |
| 2595 | |
| 2596 | /* For overlays, map pc back into its mapped VMA range. */ |
| 2597 | pc = overlay_mapped_address (pc, section); |
| 2598 | |
| 2599 | return pc; |
| 2600 | } |
| 2601 | |
| 2602 | /* Given a function start address FUNC_ADDR and SYMTAB, find the first |
| 2603 | address for that function that has an entry in SYMTAB's line info |
| 2604 | table. If such an entry cannot be found, return FUNC_ADDR |
| 2605 | unaltered. */ |
| 2606 | CORE_ADDR |
| 2607 | skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab) |
| 2608 | { |
| 2609 | CORE_ADDR func_start, func_end; |
| 2610 | struct linetable *l; |
| 2611 | int ind, i, len; |
| 2612 | int best_lineno = 0; |
| 2613 | CORE_ADDR best_pc = func_addr; |
| 2614 | |
| 2615 | /* Give up if this symbol has no lineinfo table. */ |
| 2616 | l = LINETABLE (symtab); |
| 2617 | if (l == NULL) |
| 2618 | return func_addr; |
| 2619 | |
| 2620 | /* Get the range for the function's PC values, or give up if we |
| 2621 | cannot, for some reason. */ |
| 2622 | if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end)) |
| 2623 | return func_addr; |
| 2624 | |
| 2625 | /* Linetable entries are ordered by PC values, see the commentary in |
| 2626 | symtab.h where `struct linetable' is defined. Thus, the first |
| 2627 | entry whose PC is in the range [FUNC_START..FUNC_END[ is the |
| 2628 | address we are looking for. */ |
| 2629 | for (i = 0; i < l->nitems; i++) |
| 2630 | { |
| 2631 | struct linetable_entry *item = &(l->item[i]); |
| 2632 | |
| 2633 | /* Don't use line numbers of zero, they mark special entries in |
| 2634 | the table. See the commentary on symtab.h before the |
| 2635 | definition of struct linetable. */ |
| 2636 | if (item->line > 0 && func_start <= item->pc && item->pc < func_end) |
| 2637 | return item->pc; |
| 2638 | } |
| 2639 | |
| 2640 | return func_addr; |
| 2641 | } |
| 2642 | |
| 2643 | /* Given a function symbol SYM, find the symtab and line for the start |
| 2644 | of the function. |
| 2645 | If the argument FUNFIRSTLINE is nonzero, we want the first line |
| 2646 | of real code inside the function. */ |
| 2647 | |
| 2648 | struct symtab_and_line |
| 2649 | find_function_start_sal (struct symbol *sym, int funfirstline) |
| 2650 | { |
| 2651 | struct block *block = SYMBOL_BLOCK_VALUE (sym); |
| 2652 | struct objfile *objfile = lookup_objfile_from_block (block); |
| 2653 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 2654 | |
| 2655 | CORE_ADDR pc; |
| 2656 | struct symtab_and_line sal; |
| 2657 | struct block *b, *function_block; |
| 2658 | |
| 2659 | pc = BLOCK_START (block); |
| 2660 | fixup_symbol_section (sym, objfile); |
| 2661 | if (funfirstline) |
| 2662 | { |
| 2663 | /* Skip "first line" of function (which is actually its prologue). */ |
| 2664 | pc = find_function_start_pc (gdbarch, pc, SYMBOL_OBJ_SECTION (sym)); |
| 2665 | } |
| 2666 | sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0); |
| 2667 | |
| 2668 | /* Check if gdbarch_skip_prologue left us in mid-line, and the next |
| 2669 | line is still part of the same function. */ |
| 2670 | if (sal.pc != pc |
| 2671 | && BLOCK_START (block) <= sal.end |
| 2672 | && sal.end < BLOCK_END (block)) |
| 2673 | { |
| 2674 | /* First pc of next line */ |
| 2675 | pc = sal.end; |
| 2676 | /* Recalculate the line number (might not be N+1). */ |
| 2677 | sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0); |
| 2678 | } |
| 2679 | |
| 2680 | /* On targets with executable formats that don't have a concept of |
| 2681 | constructors (ELF with .init has, PE doesn't), gcc emits a call |
| 2682 | to `__main' in `main' between the prologue and before user |
| 2683 | code. */ |
| 2684 | if (funfirstline |
| 2685 | && gdbarch_skip_main_prologue_p (gdbarch) |
| 2686 | && SYMBOL_LINKAGE_NAME (sym) |
| 2687 | && strcmp (SYMBOL_LINKAGE_NAME (sym), "main") == 0) |
| 2688 | { |
| 2689 | pc = gdbarch_skip_main_prologue (gdbarch, pc); |
| 2690 | /* Recalculate the line number (might not be N+1). */ |
| 2691 | sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0); |
| 2692 | } |
| 2693 | |
| 2694 | /* If we still don't have a valid source line, try to find the first |
| 2695 | PC in the lineinfo table that belongs to the same function. This |
| 2696 | happens with COFF debug info, which does not seem to have an |
| 2697 | entry in lineinfo table for the code after the prologue which has |
| 2698 | no direct relation to source. For example, this was found to be |
| 2699 | the case with the DJGPP target using "gcc -gcoff" when the |
| 2700 | compiler inserted code after the prologue to make sure the stack |
| 2701 | is aligned. */ |
| 2702 | if (funfirstline && sal.symtab == NULL) |
| 2703 | { |
| 2704 | pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym)); |
| 2705 | /* Recalculate the line number. */ |
| 2706 | sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0); |
| 2707 | } |
| 2708 | |
| 2709 | sal.pc = pc; |
| 2710 | |
| 2711 | /* Check if we are now inside an inlined function. If we can, |
| 2712 | use the call site of the function instead. */ |
| 2713 | b = block_for_pc_sect (sal.pc, SYMBOL_OBJ_SECTION (sym)); |
| 2714 | function_block = NULL; |
| 2715 | while (b != NULL) |
| 2716 | { |
| 2717 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 2718 | function_block = b; |
| 2719 | else if (BLOCK_FUNCTION (b) != NULL) |
| 2720 | break; |
| 2721 | b = BLOCK_SUPERBLOCK (b); |
| 2722 | } |
| 2723 | if (function_block != NULL |
| 2724 | && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0) |
| 2725 | { |
| 2726 | sal.line = SYMBOL_LINE (BLOCK_FUNCTION (function_block)); |
| 2727 | sal.symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block)); |
| 2728 | } |
| 2729 | |
| 2730 | return sal; |
| 2731 | } |
| 2732 | |
| 2733 | /* If P is of the form "operator[ \t]+..." where `...' is |
| 2734 | some legitimate operator text, return a pointer to the |
| 2735 | beginning of the substring of the operator text. |
| 2736 | Otherwise, return "". */ |
| 2737 | char * |
| 2738 | operator_chars (char *p, char **end) |
| 2739 | { |
| 2740 | *end = ""; |
| 2741 | if (strncmp (p, "operator", 8)) |
| 2742 | return *end; |
| 2743 | p += 8; |
| 2744 | |
| 2745 | /* Don't get faked out by `operator' being part of a longer |
| 2746 | identifier. */ |
| 2747 | if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0') |
| 2748 | return *end; |
| 2749 | |
| 2750 | /* Allow some whitespace between `operator' and the operator symbol. */ |
| 2751 | while (*p == ' ' || *p == '\t') |
| 2752 | p++; |
| 2753 | |
| 2754 | /* Recognize 'operator TYPENAME'. */ |
| 2755 | |
| 2756 | if (isalpha (*p) || *p == '_' || *p == '$') |
| 2757 | { |
| 2758 | char *q = p + 1; |
| 2759 | while (isalnum (*q) || *q == '_' || *q == '$') |
| 2760 | q++; |
| 2761 | *end = q; |
| 2762 | return p; |
| 2763 | } |
| 2764 | |
| 2765 | while (*p) |
| 2766 | switch (*p) |
| 2767 | { |
| 2768 | case '\\': /* regexp quoting */ |
| 2769 | if (p[1] == '*') |
| 2770 | { |
| 2771 | if (p[2] == '=') /* 'operator\*=' */ |
| 2772 | *end = p + 3; |
| 2773 | else /* 'operator\*' */ |
| 2774 | *end = p + 2; |
| 2775 | return p; |
| 2776 | } |
| 2777 | else if (p[1] == '[') |
| 2778 | { |
| 2779 | if (p[2] == ']') |
| 2780 | error (_("mismatched quoting on brackets, try 'operator\\[\\]'")); |
| 2781 | else if (p[2] == '\\' && p[3] == ']') |
| 2782 | { |
| 2783 | *end = p + 4; /* 'operator\[\]' */ |
| 2784 | return p; |
| 2785 | } |
| 2786 | else |
| 2787 | error (_("nothing is allowed between '[' and ']'")); |
| 2788 | } |
| 2789 | else |
| 2790 | { |
| 2791 | /* Gratuitous qoute: skip it and move on. */ |
| 2792 | p++; |
| 2793 | continue; |
| 2794 | } |
| 2795 | break; |
| 2796 | case '!': |
| 2797 | case '=': |
| 2798 | case '*': |
| 2799 | case '/': |
| 2800 | case '%': |
| 2801 | case '^': |
| 2802 | if (p[1] == '=') |
| 2803 | *end = p + 2; |
| 2804 | else |
| 2805 | *end = p + 1; |
| 2806 | return p; |
| 2807 | case '<': |
| 2808 | case '>': |
| 2809 | case '+': |
| 2810 | case '-': |
| 2811 | case '&': |
| 2812 | case '|': |
| 2813 | if (p[0] == '-' && p[1] == '>') |
| 2814 | { |
| 2815 | /* Struct pointer member operator 'operator->'. */ |
| 2816 | if (p[2] == '*') |
| 2817 | { |
| 2818 | *end = p + 3; /* 'operator->*' */ |
| 2819 | return p; |
| 2820 | } |
| 2821 | else if (p[2] == '\\') |
| 2822 | { |
| 2823 | *end = p + 4; /* Hopefully 'operator->\*' */ |
| 2824 | return p; |
| 2825 | } |
| 2826 | else |
| 2827 | { |
| 2828 | *end = p + 2; /* 'operator->' */ |
| 2829 | return p; |
| 2830 | } |
| 2831 | } |
| 2832 | if (p[1] == '=' || p[1] == p[0]) |
| 2833 | *end = p + 2; |
| 2834 | else |
| 2835 | *end = p + 1; |
| 2836 | return p; |
| 2837 | case '~': |
| 2838 | case ',': |
| 2839 | *end = p + 1; |
| 2840 | return p; |
| 2841 | case '(': |
| 2842 | if (p[1] != ')') |
| 2843 | error (_("`operator ()' must be specified without whitespace in `()'")); |
| 2844 | *end = p + 2; |
| 2845 | return p; |
| 2846 | case '?': |
| 2847 | if (p[1] != ':') |
| 2848 | error (_("`operator ?:' must be specified without whitespace in `?:'")); |
| 2849 | *end = p + 2; |
| 2850 | return p; |
| 2851 | case '[': |
| 2852 | if (p[1] != ']') |
| 2853 | error (_("`operator []' must be specified without whitespace in `[]'")); |
| 2854 | *end = p + 2; |
| 2855 | return p; |
| 2856 | default: |
| 2857 | error (_("`operator %s' not supported"), p); |
| 2858 | break; |
| 2859 | } |
| 2860 | |
| 2861 | *end = ""; |
| 2862 | return *end; |
| 2863 | } |
| 2864 | \f |
| 2865 | |
| 2866 | /* If FILE is not already in the table of files, return zero; |
| 2867 | otherwise return non-zero. Optionally add FILE to the table if ADD |
| 2868 | is non-zero. If *FIRST is non-zero, forget the old table |
| 2869 | contents. */ |
| 2870 | static int |
| 2871 | filename_seen (const char *file, int add, int *first) |
| 2872 | { |
| 2873 | /* Table of files seen so far. */ |
| 2874 | static const char **tab = NULL; |
| 2875 | /* Allocated size of tab in elements. |
| 2876 | Start with one 256-byte block (when using GNU malloc.c). |
| 2877 | 24 is the malloc overhead when range checking is in effect. */ |
| 2878 | static int tab_alloc_size = (256 - 24) / sizeof (char *); |
| 2879 | /* Current size of tab in elements. */ |
| 2880 | static int tab_cur_size; |
| 2881 | const char **p; |
| 2882 | |
| 2883 | if (*first) |
| 2884 | { |
| 2885 | if (tab == NULL) |
| 2886 | tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab)); |
| 2887 | tab_cur_size = 0; |
| 2888 | } |
| 2889 | |
| 2890 | /* Is FILE in tab? */ |
| 2891 | for (p = tab; p < tab + tab_cur_size; p++) |
| 2892 | if (strcmp (*p, file) == 0) |
| 2893 | return 1; |
| 2894 | |
| 2895 | /* No; maybe add it to tab. */ |
| 2896 | if (add) |
| 2897 | { |
| 2898 | if (tab_cur_size == tab_alloc_size) |
| 2899 | { |
| 2900 | tab_alloc_size *= 2; |
| 2901 | tab = (const char **) xrealloc ((char *) tab, |
| 2902 | tab_alloc_size * sizeof (*tab)); |
| 2903 | } |
| 2904 | tab[tab_cur_size++] = file; |
| 2905 | } |
| 2906 | |
| 2907 | return 0; |
| 2908 | } |
| 2909 | |
| 2910 | /* Slave routine for sources_info. Force line breaks at ,'s. |
| 2911 | NAME is the name to print and *FIRST is nonzero if this is the first |
| 2912 | name printed. Set *FIRST to zero. */ |
| 2913 | static void |
| 2914 | output_source_filename (const char *name, int *first) |
| 2915 | { |
| 2916 | /* Since a single source file can result in several partial symbol |
| 2917 | tables, we need to avoid printing it more than once. Note: if |
| 2918 | some of the psymtabs are read in and some are not, it gets |
| 2919 | printed both under "Source files for which symbols have been |
| 2920 | read" and "Source files for which symbols will be read in on |
| 2921 | demand". I consider this a reasonable way to deal with the |
| 2922 | situation. I'm not sure whether this can also happen for |
| 2923 | symtabs; it doesn't hurt to check. */ |
| 2924 | |
| 2925 | /* Was NAME already seen? */ |
| 2926 | if (filename_seen (name, 1, first)) |
| 2927 | { |
| 2928 | /* Yes; don't print it again. */ |
| 2929 | return; |
| 2930 | } |
| 2931 | /* No; print it and reset *FIRST. */ |
| 2932 | if (*first) |
| 2933 | { |
| 2934 | *first = 0; |
| 2935 | } |
| 2936 | else |
| 2937 | { |
| 2938 | printf_filtered (", "); |
| 2939 | } |
| 2940 | |
| 2941 | wrap_here (""); |
| 2942 | fputs_filtered (name, gdb_stdout); |
| 2943 | } |
| 2944 | |
| 2945 | static void |
| 2946 | sources_info (char *ignore, int from_tty) |
| 2947 | { |
| 2948 | struct symtab *s; |
| 2949 | struct partial_symtab *ps; |
| 2950 | struct objfile *objfile; |
| 2951 | int first; |
| 2952 | |
| 2953 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 2954 | { |
| 2955 | error (_("No symbol table is loaded. Use the \"file\" command.")); |
| 2956 | } |
| 2957 | |
| 2958 | printf_filtered ("Source files for which symbols have been read in:\n\n"); |
| 2959 | |
| 2960 | first = 1; |
| 2961 | ALL_SYMTABS (objfile, s) |
| 2962 | { |
| 2963 | const char *fullname = symtab_to_fullname (s); |
| 2964 | output_source_filename (fullname ? fullname : s->filename, &first); |
| 2965 | } |
| 2966 | printf_filtered ("\n\n"); |
| 2967 | |
| 2968 | printf_filtered ("Source files for which symbols will be read in on demand:\n\n"); |
| 2969 | |
| 2970 | first = 1; |
| 2971 | ALL_PSYMTABS (objfile, ps) |
| 2972 | { |
| 2973 | if (!ps->readin) |
| 2974 | { |
| 2975 | const char *fullname = psymtab_to_fullname (ps); |
| 2976 | output_source_filename (fullname ? fullname : ps->filename, &first); |
| 2977 | } |
| 2978 | } |
| 2979 | printf_filtered ("\n"); |
| 2980 | } |
| 2981 | |
| 2982 | static int |
| 2983 | file_matches (char *file, char *files[], int nfiles) |
| 2984 | { |
| 2985 | int i; |
| 2986 | |
| 2987 | if (file != NULL && nfiles != 0) |
| 2988 | { |
| 2989 | for (i = 0; i < nfiles; i++) |
| 2990 | { |
| 2991 | if (strcmp (files[i], lbasename (file)) == 0) |
| 2992 | return 1; |
| 2993 | } |
| 2994 | } |
| 2995 | else if (nfiles == 0) |
| 2996 | return 1; |
| 2997 | return 0; |
| 2998 | } |
| 2999 | |
| 3000 | /* Free any memory associated with a search. */ |
| 3001 | void |
| 3002 | free_search_symbols (struct symbol_search *symbols) |
| 3003 | { |
| 3004 | struct symbol_search *p; |
| 3005 | struct symbol_search *next; |
| 3006 | |
| 3007 | for (p = symbols; p != NULL; p = next) |
| 3008 | { |
| 3009 | next = p->next; |
| 3010 | xfree (p); |
| 3011 | } |
| 3012 | } |
| 3013 | |
| 3014 | static void |
| 3015 | do_free_search_symbols_cleanup (void *symbols) |
| 3016 | { |
| 3017 | free_search_symbols (symbols); |
| 3018 | } |
| 3019 | |
| 3020 | struct cleanup * |
| 3021 | make_cleanup_free_search_symbols (struct symbol_search *symbols) |
| 3022 | { |
| 3023 | return make_cleanup (do_free_search_symbols_cleanup, symbols); |
| 3024 | } |
| 3025 | |
| 3026 | /* Helper function for sort_search_symbols and qsort. Can only |
| 3027 | sort symbols, not minimal symbols. */ |
| 3028 | static int |
| 3029 | compare_search_syms (const void *sa, const void *sb) |
| 3030 | { |
| 3031 | struct symbol_search **sym_a = (struct symbol_search **) sa; |
| 3032 | struct symbol_search **sym_b = (struct symbol_search **) sb; |
| 3033 | |
| 3034 | return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol), |
| 3035 | SYMBOL_PRINT_NAME ((*sym_b)->symbol)); |
| 3036 | } |
| 3037 | |
| 3038 | /* Sort the ``nfound'' symbols in the list after prevtail. Leave |
| 3039 | prevtail where it is, but update its next pointer to point to |
| 3040 | the first of the sorted symbols. */ |
| 3041 | static struct symbol_search * |
| 3042 | sort_search_symbols (struct symbol_search *prevtail, int nfound) |
| 3043 | { |
| 3044 | struct symbol_search **symbols, *symp, *old_next; |
| 3045 | int i; |
| 3046 | |
| 3047 | symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *) |
| 3048 | * nfound); |
| 3049 | symp = prevtail->next; |
| 3050 | for (i = 0; i < nfound; i++) |
| 3051 | { |
| 3052 | symbols[i] = symp; |
| 3053 | symp = symp->next; |
| 3054 | } |
| 3055 | /* Generally NULL. */ |
| 3056 | old_next = symp; |
| 3057 | |
| 3058 | qsort (symbols, nfound, sizeof (struct symbol_search *), |
| 3059 | compare_search_syms); |
| 3060 | |
| 3061 | symp = prevtail; |
| 3062 | for (i = 0; i < nfound; i++) |
| 3063 | { |
| 3064 | symp->next = symbols[i]; |
| 3065 | symp = symp->next; |
| 3066 | } |
| 3067 | symp->next = old_next; |
| 3068 | |
| 3069 | xfree (symbols); |
| 3070 | return symp; |
| 3071 | } |
| 3072 | |
| 3073 | /* Search the symbol table for matches to the regular expression REGEXP, |
| 3074 | returning the results in *MATCHES. |
| 3075 | |
| 3076 | Only symbols of KIND are searched: |
| 3077 | FUNCTIONS_DOMAIN - search all functions |
| 3078 | TYPES_DOMAIN - search all type names |
| 3079 | VARIABLES_DOMAIN - search all symbols, excluding functions, type names, |
| 3080 | and constants (enums) |
| 3081 | |
| 3082 | free_search_symbols should be called when *MATCHES is no longer needed. |
| 3083 | |
| 3084 | The results are sorted locally; each symtab's global and static blocks are |
| 3085 | separately alphabetized. |
| 3086 | */ |
| 3087 | void |
| 3088 | search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[], |
| 3089 | struct symbol_search **matches) |
| 3090 | { |
| 3091 | struct symtab *s; |
| 3092 | struct partial_symtab *ps; |
| 3093 | struct blockvector *bv; |
| 3094 | struct block *b; |
| 3095 | int i = 0; |
| 3096 | struct dict_iterator iter; |
| 3097 | struct symbol *sym; |
| 3098 | struct partial_symbol **psym; |
| 3099 | struct objfile *objfile; |
| 3100 | struct minimal_symbol *msymbol; |
| 3101 | char *val; |
| 3102 | int found_misc = 0; |
| 3103 | static enum minimal_symbol_type types[] |
| 3104 | = |
| 3105 | {mst_data, mst_text, mst_abs, mst_unknown}; |
| 3106 | static enum minimal_symbol_type types2[] |
| 3107 | = |
| 3108 | {mst_bss, mst_file_text, mst_abs, mst_unknown}; |
| 3109 | static enum minimal_symbol_type types3[] |
| 3110 | = |
| 3111 | {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown}; |
| 3112 | static enum minimal_symbol_type types4[] |
| 3113 | = |
| 3114 | {mst_file_bss, mst_text, mst_abs, mst_unknown}; |
| 3115 | enum minimal_symbol_type ourtype; |
| 3116 | enum minimal_symbol_type ourtype2; |
| 3117 | enum minimal_symbol_type ourtype3; |
| 3118 | enum minimal_symbol_type ourtype4; |
| 3119 | struct symbol_search *sr; |
| 3120 | struct symbol_search *psr; |
| 3121 | struct symbol_search *tail; |
| 3122 | struct cleanup *old_chain = NULL; |
| 3123 | |
| 3124 | if (kind < VARIABLES_DOMAIN) |
| 3125 | error (_("must search on specific domain")); |
| 3126 | |
| 3127 | ourtype = types[(int) (kind - VARIABLES_DOMAIN)]; |
| 3128 | ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)]; |
| 3129 | ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)]; |
| 3130 | ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)]; |
| 3131 | |
| 3132 | sr = *matches = NULL; |
| 3133 | tail = NULL; |
| 3134 | |
| 3135 | if (regexp != NULL) |
| 3136 | { |
| 3137 | /* Make sure spacing is right for C++ operators. |
| 3138 | This is just a courtesy to make the matching less sensitive |
| 3139 | to how many spaces the user leaves between 'operator' |
| 3140 | and <TYPENAME> or <OPERATOR>. */ |
| 3141 | char *opend; |
| 3142 | char *opname = operator_chars (regexp, &opend); |
| 3143 | if (*opname) |
| 3144 | { |
| 3145 | int fix = -1; /* -1 means ok; otherwise number of spaces needed. */ |
| 3146 | if (isalpha (*opname) || *opname == '_' || *opname == '$') |
| 3147 | { |
| 3148 | /* There should 1 space between 'operator' and 'TYPENAME'. */ |
| 3149 | if (opname[-1] != ' ' || opname[-2] == ' ') |
| 3150 | fix = 1; |
| 3151 | } |
| 3152 | else |
| 3153 | { |
| 3154 | /* There should 0 spaces between 'operator' and 'OPERATOR'. */ |
| 3155 | if (opname[-1] == ' ') |
| 3156 | fix = 0; |
| 3157 | } |
| 3158 | /* If wrong number of spaces, fix it. */ |
| 3159 | if (fix >= 0) |
| 3160 | { |
| 3161 | char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1); |
| 3162 | sprintf (tmp, "operator%.*s%s", fix, " ", opname); |
| 3163 | regexp = tmp; |
| 3164 | } |
| 3165 | } |
| 3166 | |
| 3167 | if (0 != (val = re_comp (regexp))) |
| 3168 | error (_("Invalid regexp (%s): %s"), val, regexp); |
| 3169 | } |
| 3170 | |
| 3171 | /* Search through the partial symtabs *first* for all symbols |
| 3172 | matching the regexp. That way we don't have to reproduce all of |
| 3173 | the machinery below. */ |
| 3174 | |
| 3175 | ALL_PSYMTABS (objfile, ps) |
| 3176 | { |
| 3177 | struct partial_symbol **bound, **gbound, **sbound; |
| 3178 | int keep_going = 1; |
| 3179 | |
| 3180 | if (ps->readin) |
| 3181 | continue; |
| 3182 | |
| 3183 | gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms; |
| 3184 | sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms; |
| 3185 | bound = gbound; |
| 3186 | |
| 3187 | /* Go through all of the symbols stored in a partial |
| 3188 | symtab in one loop. */ |
| 3189 | psym = objfile->global_psymbols.list + ps->globals_offset; |
| 3190 | while (keep_going) |
| 3191 | { |
| 3192 | if (psym >= bound) |
| 3193 | { |
| 3194 | if (bound == gbound && ps->n_static_syms != 0) |
| 3195 | { |
| 3196 | psym = objfile->static_psymbols.list + ps->statics_offset; |
| 3197 | bound = sbound; |
| 3198 | } |
| 3199 | else |
| 3200 | keep_going = 0; |
| 3201 | continue; |
| 3202 | } |
| 3203 | else |
| 3204 | { |
| 3205 | QUIT; |
| 3206 | |
| 3207 | /* If it would match (logic taken from loop below) |
| 3208 | load the file and go on to the next one. We check the |
| 3209 | filename here, but that's a bit bogus: we don't know |
| 3210 | what file it really comes from until we have full |
| 3211 | symtabs. The symbol might be in a header file included by |
| 3212 | this psymtab. This only affects Insight. */ |
| 3213 | if (file_matches (ps->filename, files, nfiles) |
| 3214 | && ((regexp == NULL |
| 3215 | || re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0) |
| 3216 | && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF |
| 3217 | && SYMBOL_CLASS (*psym) != LOC_BLOCK) |
| 3218 | || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK) |
| 3219 | || (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)))) |
| 3220 | { |
| 3221 | PSYMTAB_TO_SYMTAB (ps); |
| 3222 | keep_going = 0; |
| 3223 | } |
| 3224 | } |
| 3225 | psym++; |
| 3226 | } |
| 3227 | } |
| 3228 | |
| 3229 | /* Here, we search through the minimal symbol tables for functions |
| 3230 | and variables that match, and force their symbols to be read. |
| 3231 | This is in particular necessary for demangled variable names, |
| 3232 | which are no longer put into the partial symbol tables. |
| 3233 | The symbol will then be found during the scan of symtabs below. |
| 3234 | |
| 3235 | For functions, find_pc_symtab should succeed if we have debug info |
| 3236 | for the function, for variables we have to call lookup_symbol |
| 3237 | to determine if the variable has debug info. |
| 3238 | If the lookup fails, set found_misc so that we will rescan to print |
| 3239 | any matching symbols without debug info. |
| 3240 | */ |
| 3241 | |
| 3242 | if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN)) |
| 3243 | { |
| 3244 | ALL_MSYMBOLS (objfile, msymbol) |
| 3245 | { |
| 3246 | QUIT; |
| 3247 | |
| 3248 | if (MSYMBOL_TYPE (msymbol) == ourtype || |
| 3249 | MSYMBOL_TYPE (msymbol) == ourtype2 || |
| 3250 | MSYMBOL_TYPE (msymbol) == ourtype3 || |
| 3251 | MSYMBOL_TYPE (msymbol) == ourtype4) |
| 3252 | { |
| 3253 | if (regexp == NULL |
| 3254 | || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0) |
| 3255 | { |
| 3256 | if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))) |
| 3257 | { |
| 3258 | /* FIXME: carlton/2003-02-04: Given that the |
| 3259 | semantics of lookup_symbol keeps on changing |
| 3260 | slightly, it would be a nice idea if we had a |
| 3261 | function lookup_symbol_minsym that found the |
| 3262 | symbol associated to a given minimal symbol (if |
| 3263 | any). */ |
| 3264 | if (kind == FUNCTIONS_DOMAIN |
| 3265 | || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol), |
| 3266 | (struct block *) NULL, |
| 3267 | VAR_DOMAIN, 0) |
| 3268 | == NULL) |
| 3269 | found_misc = 1; |
| 3270 | } |
| 3271 | } |
| 3272 | } |
| 3273 | } |
| 3274 | } |
| 3275 | |
| 3276 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 3277 | { |
| 3278 | bv = BLOCKVECTOR (s); |
| 3279 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
| 3280 | { |
| 3281 | struct symbol_search *prevtail = tail; |
| 3282 | int nfound = 0; |
| 3283 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 3284 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3285 | { |
| 3286 | struct symtab *real_symtab = SYMBOL_SYMTAB (sym); |
| 3287 | QUIT; |
| 3288 | |
| 3289 | if (file_matches (real_symtab->filename, files, nfiles) |
| 3290 | && ((regexp == NULL |
| 3291 | || re_exec (SYMBOL_NATURAL_NAME (sym)) != 0) |
| 3292 | && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF |
| 3293 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
| 3294 | && SYMBOL_CLASS (sym) != LOC_CONST) |
| 3295 | || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 3296 | || (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF)))) |
| 3297 | { |
| 3298 | /* match */ |
| 3299 | psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search)); |
| 3300 | psr->block = i; |
| 3301 | psr->symtab = real_symtab; |
| 3302 | psr->symbol = sym; |
| 3303 | psr->msymbol = NULL; |
| 3304 | psr->next = NULL; |
| 3305 | if (tail == NULL) |
| 3306 | sr = psr; |
| 3307 | else |
| 3308 | tail->next = psr; |
| 3309 | tail = psr; |
| 3310 | nfound ++; |
| 3311 | } |
| 3312 | } |
| 3313 | if (nfound > 0) |
| 3314 | { |
| 3315 | if (prevtail == NULL) |
| 3316 | { |
| 3317 | struct symbol_search dummy; |
| 3318 | |
| 3319 | dummy.next = sr; |
| 3320 | tail = sort_search_symbols (&dummy, nfound); |
| 3321 | sr = dummy.next; |
| 3322 | |
| 3323 | old_chain = make_cleanup_free_search_symbols (sr); |
| 3324 | } |
| 3325 | else |
| 3326 | tail = sort_search_symbols (prevtail, nfound); |
| 3327 | } |
| 3328 | } |
| 3329 | } |
| 3330 | |
| 3331 | /* If there are no eyes, avoid all contact. I mean, if there are |
| 3332 | no debug symbols, then print directly from the msymbol_vector. */ |
| 3333 | |
| 3334 | if (found_misc || kind != FUNCTIONS_DOMAIN) |
| 3335 | { |
| 3336 | ALL_MSYMBOLS (objfile, msymbol) |
| 3337 | { |
| 3338 | QUIT; |
| 3339 | |
| 3340 | if (MSYMBOL_TYPE (msymbol) == ourtype || |
| 3341 | MSYMBOL_TYPE (msymbol) == ourtype2 || |
| 3342 | MSYMBOL_TYPE (msymbol) == ourtype3 || |
| 3343 | MSYMBOL_TYPE (msymbol) == ourtype4) |
| 3344 | { |
| 3345 | if (regexp == NULL |
| 3346 | || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0) |
| 3347 | { |
| 3348 | /* Functions: Look up by address. */ |
| 3349 | if (kind != FUNCTIONS_DOMAIN || |
| 3350 | (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))) |
| 3351 | { |
| 3352 | /* Variables/Absolutes: Look up by name */ |
| 3353 | if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol), |
| 3354 | (struct block *) NULL, VAR_DOMAIN, 0) |
| 3355 | == NULL) |
| 3356 | { |
| 3357 | /* match */ |
| 3358 | psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search)); |
| 3359 | psr->block = i; |
| 3360 | psr->msymbol = msymbol; |
| 3361 | psr->symtab = NULL; |
| 3362 | psr->symbol = NULL; |
| 3363 | psr->next = NULL; |
| 3364 | if (tail == NULL) |
| 3365 | { |
| 3366 | sr = psr; |
| 3367 | old_chain = make_cleanup_free_search_symbols (sr); |
| 3368 | } |
| 3369 | else |
| 3370 | tail->next = psr; |
| 3371 | tail = psr; |
| 3372 | } |
| 3373 | } |
| 3374 | } |
| 3375 | } |
| 3376 | } |
| 3377 | } |
| 3378 | |
| 3379 | *matches = sr; |
| 3380 | if (sr != NULL) |
| 3381 | discard_cleanups (old_chain); |
| 3382 | } |
| 3383 | |
| 3384 | /* Helper function for symtab_symbol_info, this function uses |
| 3385 | the data returned from search_symbols() to print information |
| 3386 | regarding the match to gdb_stdout. |
| 3387 | */ |
| 3388 | static void |
| 3389 | print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym, |
| 3390 | int block, char *last) |
| 3391 | { |
| 3392 | if (last == NULL || strcmp (last, s->filename) != 0) |
| 3393 | { |
| 3394 | fputs_filtered ("\nFile ", gdb_stdout); |
| 3395 | fputs_filtered (s->filename, gdb_stdout); |
| 3396 | fputs_filtered (":\n", gdb_stdout); |
| 3397 | } |
| 3398 | |
| 3399 | if (kind != TYPES_DOMAIN && block == STATIC_BLOCK) |
| 3400 | printf_filtered ("static "); |
| 3401 | |
| 3402 | /* Typedef that is not a C++ class */ |
| 3403 | if (kind == TYPES_DOMAIN |
| 3404 | && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN) |
| 3405 | typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout); |
| 3406 | /* variable, func, or typedef-that-is-c++-class */ |
| 3407 | else if (kind < TYPES_DOMAIN || |
| 3408 | (kind == TYPES_DOMAIN && |
| 3409 | SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN)) |
| 3410 | { |
| 3411 | type_print (SYMBOL_TYPE (sym), |
| 3412 | (SYMBOL_CLASS (sym) == LOC_TYPEDEF |
| 3413 | ? "" : SYMBOL_PRINT_NAME (sym)), |
| 3414 | gdb_stdout, 0); |
| 3415 | |
| 3416 | printf_filtered (";\n"); |
| 3417 | } |
| 3418 | } |
| 3419 | |
| 3420 | /* This help function for symtab_symbol_info() prints information |
| 3421 | for non-debugging symbols to gdb_stdout. |
| 3422 | */ |
| 3423 | static void |
| 3424 | print_msymbol_info (struct minimal_symbol *msymbol) |
| 3425 | { |
| 3426 | struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol)); |
| 3427 | char *tmp; |
| 3428 | |
| 3429 | if (gdbarch_addr_bit (gdbarch) <= 32) |
| 3430 | tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol) |
| 3431 | & (CORE_ADDR) 0xffffffff, |
| 3432 | 8); |
| 3433 | else |
| 3434 | tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol), |
| 3435 | 16); |
| 3436 | printf_filtered ("%s %s\n", |
| 3437 | tmp, SYMBOL_PRINT_NAME (msymbol)); |
| 3438 | } |
| 3439 | |
| 3440 | /* This is the guts of the commands "info functions", "info types", and |
| 3441 | "info variables". It calls search_symbols to find all matches and then |
| 3442 | print_[m]symbol_info to print out some useful information about the |
| 3443 | matches. |
| 3444 | */ |
| 3445 | static void |
| 3446 | symtab_symbol_info (char *regexp, domain_enum kind, int from_tty) |
| 3447 | { |
| 3448 | static char *classnames[] |
| 3449 | = |
| 3450 | {"variable", "function", "type", "method"}; |
| 3451 | struct symbol_search *symbols; |
| 3452 | struct symbol_search *p; |
| 3453 | struct cleanup *old_chain; |
| 3454 | char *last_filename = NULL; |
| 3455 | int first = 1; |
| 3456 | |
| 3457 | /* must make sure that if we're interrupted, symbols gets freed */ |
| 3458 | search_symbols (regexp, kind, 0, (char **) NULL, &symbols); |
| 3459 | old_chain = make_cleanup_free_search_symbols (symbols); |
| 3460 | |
| 3461 | printf_filtered (regexp |
| 3462 | ? "All %ss matching regular expression \"%s\":\n" |
| 3463 | : "All defined %ss:\n", |
| 3464 | classnames[(int) (kind - VARIABLES_DOMAIN)], regexp); |
| 3465 | |
| 3466 | for (p = symbols; p != NULL; p = p->next) |
| 3467 | { |
| 3468 | QUIT; |
| 3469 | |
| 3470 | if (p->msymbol != NULL) |
| 3471 | { |
| 3472 | if (first) |
| 3473 | { |
| 3474 | printf_filtered ("\nNon-debugging symbols:\n"); |
| 3475 | first = 0; |
| 3476 | } |
| 3477 | print_msymbol_info (p->msymbol); |
| 3478 | } |
| 3479 | else |
| 3480 | { |
| 3481 | print_symbol_info (kind, |
| 3482 | p->symtab, |
| 3483 | p->symbol, |
| 3484 | p->block, |
| 3485 | last_filename); |
| 3486 | last_filename = p->symtab->filename; |
| 3487 | } |
| 3488 | } |
| 3489 | |
| 3490 | do_cleanups (old_chain); |
| 3491 | } |
| 3492 | |
| 3493 | static void |
| 3494 | variables_info (char *regexp, int from_tty) |
| 3495 | { |
| 3496 | symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty); |
| 3497 | } |
| 3498 | |
| 3499 | static void |
| 3500 | functions_info (char *regexp, int from_tty) |
| 3501 | { |
| 3502 | symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty); |
| 3503 | } |
| 3504 | |
| 3505 | |
| 3506 | static void |
| 3507 | types_info (char *regexp, int from_tty) |
| 3508 | { |
| 3509 | symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty); |
| 3510 | } |
| 3511 | |
| 3512 | /* Breakpoint all functions matching regular expression. */ |
| 3513 | |
| 3514 | void |
| 3515 | rbreak_command_wrapper (char *regexp, int from_tty) |
| 3516 | { |
| 3517 | rbreak_command (regexp, from_tty); |
| 3518 | } |
| 3519 | |
| 3520 | static void |
| 3521 | rbreak_command (char *regexp, int from_tty) |
| 3522 | { |
| 3523 | struct symbol_search *ss; |
| 3524 | struct symbol_search *p; |
| 3525 | struct cleanup *old_chain; |
| 3526 | |
| 3527 | search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss); |
| 3528 | old_chain = make_cleanup_free_search_symbols (ss); |
| 3529 | |
| 3530 | for (p = ss; p != NULL; p = p->next) |
| 3531 | { |
| 3532 | if (p->msymbol == NULL) |
| 3533 | { |
| 3534 | char *string = alloca (strlen (p->symtab->filename) |
| 3535 | + strlen (SYMBOL_LINKAGE_NAME (p->symbol)) |
| 3536 | + 4); |
| 3537 | strcpy (string, p->symtab->filename); |
| 3538 | strcat (string, ":'"); |
| 3539 | strcat (string, SYMBOL_LINKAGE_NAME (p->symbol)); |
| 3540 | strcat (string, "'"); |
| 3541 | break_command (string, from_tty); |
| 3542 | print_symbol_info (FUNCTIONS_DOMAIN, |
| 3543 | p->symtab, |
| 3544 | p->symbol, |
| 3545 | p->block, |
| 3546 | p->symtab->filename); |
| 3547 | } |
| 3548 | else |
| 3549 | { |
| 3550 | char *string = alloca (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) |
| 3551 | + 3); |
| 3552 | strcpy (string, "'"); |
| 3553 | strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol)); |
| 3554 | strcat (string, "'"); |
| 3555 | |
| 3556 | break_command (string, from_tty); |
| 3557 | printf_filtered ("<function, no debug info> %s;\n", |
| 3558 | SYMBOL_PRINT_NAME (p->msymbol)); |
| 3559 | } |
| 3560 | } |
| 3561 | |
| 3562 | do_cleanups (old_chain); |
| 3563 | } |
| 3564 | \f |
| 3565 | |
| 3566 | /* Helper routine for make_symbol_completion_list. */ |
| 3567 | |
| 3568 | static int return_val_size; |
| 3569 | static int return_val_index; |
| 3570 | static char **return_val; |
| 3571 | |
| 3572 | #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \ |
| 3573 | completion_list_add_name \ |
| 3574 | (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word)) |
| 3575 | |
| 3576 | /* Test to see if the symbol specified by SYMNAME (which is already |
| 3577 | demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN |
| 3578 | characters. If so, add it to the current completion list. */ |
| 3579 | |
| 3580 | static void |
| 3581 | completion_list_add_name (char *symname, char *sym_text, int sym_text_len, |
| 3582 | char *text, char *word) |
| 3583 | { |
| 3584 | int newsize; |
| 3585 | int i; |
| 3586 | |
| 3587 | /* clip symbols that cannot match */ |
| 3588 | |
| 3589 | if (strncmp (symname, sym_text, sym_text_len) != 0) |
| 3590 | { |
| 3591 | return; |
| 3592 | } |
| 3593 | |
| 3594 | /* We have a match for a completion, so add SYMNAME to the current list |
| 3595 | of matches. Note that the name is moved to freshly malloc'd space. */ |
| 3596 | |
| 3597 | { |
| 3598 | char *new; |
| 3599 | if (word == sym_text) |
| 3600 | { |
| 3601 | new = xmalloc (strlen (symname) + 5); |
| 3602 | strcpy (new, symname); |
| 3603 | } |
| 3604 | else if (word > sym_text) |
| 3605 | { |
| 3606 | /* Return some portion of symname. */ |
| 3607 | new = xmalloc (strlen (symname) + 5); |
| 3608 | strcpy (new, symname + (word - sym_text)); |
| 3609 | } |
| 3610 | else |
| 3611 | { |
| 3612 | /* Return some of SYM_TEXT plus symname. */ |
| 3613 | new = xmalloc (strlen (symname) + (sym_text - word) + 5); |
| 3614 | strncpy (new, word, sym_text - word); |
| 3615 | new[sym_text - word] = '\0'; |
| 3616 | strcat (new, symname); |
| 3617 | } |
| 3618 | |
| 3619 | if (return_val_index + 3 > return_val_size) |
| 3620 | { |
| 3621 | newsize = (return_val_size *= 2) * sizeof (char *); |
| 3622 | return_val = (char **) xrealloc ((char *) return_val, newsize); |
| 3623 | } |
| 3624 | return_val[return_val_index++] = new; |
| 3625 | return_val[return_val_index] = NULL; |
| 3626 | } |
| 3627 | } |
| 3628 | |
| 3629 | /* ObjC: In case we are completing on a selector, look as the msymbol |
| 3630 | again and feed all the selectors into the mill. */ |
| 3631 | |
| 3632 | static void |
| 3633 | completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text, |
| 3634 | int sym_text_len, char *text, char *word) |
| 3635 | { |
| 3636 | static char *tmp = NULL; |
| 3637 | static unsigned int tmplen = 0; |
| 3638 | |
| 3639 | char *method, *category, *selector; |
| 3640 | char *tmp2 = NULL; |
| 3641 | |
| 3642 | method = SYMBOL_NATURAL_NAME (msymbol); |
| 3643 | |
| 3644 | /* Is it a method? */ |
| 3645 | if ((method[0] != '-') && (method[0] != '+')) |
| 3646 | return; |
| 3647 | |
| 3648 | if (sym_text[0] == '[') |
| 3649 | /* Complete on shortened method method. */ |
| 3650 | completion_list_add_name (method + 1, sym_text, sym_text_len, text, word); |
| 3651 | |
| 3652 | while ((strlen (method) + 1) >= tmplen) |
| 3653 | { |
| 3654 | if (tmplen == 0) |
| 3655 | tmplen = 1024; |
| 3656 | else |
| 3657 | tmplen *= 2; |
| 3658 | tmp = xrealloc (tmp, tmplen); |
| 3659 | } |
| 3660 | selector = strchr (method, ' '); |
| 3661 | if (selector != NULL) |
| 3662 | selector++; |
| 3663 | |
| 3664 | category = strchr (method, '('); |
| 3665 | |
| 3666 | if ((category != NULL) && (selector != NULL)) |
| 3667 | { |
| 3668 | memcpy (tmp, method, (category - method)); |
| 3669 | tmp[category - method] = ' '; |
| 3670 | memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1); |
| 3671 | completion_list_add_name (tmp, sym_text, sym_text_len, text, word); |
| 3672 | if (sym_text[0] == '[') |
| 3673 | completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word); |
| 3674 | } |
| 3675 | |
| 3676 | if (selector != NULL) |
| 3677 | { |
| 3678 | /* Complete on selector only. */ |
| 3679 | strcpy (tmp, selector); |
| 3680 | tmp2 = strchr (tmp, ']'); |
| 3681 | if (tmp2 != NULL) |
| 3682 | *tmp2 = '\0'; |
| 3683 | |
| 3684 | completion_list_add_name (tmp, sym_text, sym_text_len, text, word); |
| 3685 | } |
| 3686 | } |
| 3687 | |
| 3688 | /* Break the non-quoted text based on the characters which are in |
| 3689 | symbols. FIXME: This should probably be language-specific. */ |
| 3690 | |
| 3691 | static char * |
| 3692 | language_search_unquoted_string (char *text, char *p) |
| 3693 | { |
| 3694 | for (; p > text; --p) |
| 3695 | { |
| 3696 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0') |
| 3697 | continue; |
| 3698 | else |
| 3699 | { |
| 3700 | if ((current_language->la_language == language_objc)) |
| 3701 | { |
| 3702 | if (p[-1] == ':') /* might be part of a method name */ |
| 3703 | continue; |
| 3704 | else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+')) |
| 3705 | p -= 2; /* beginning of a method name */ |
| 3706 | else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')') |
| 3707 | { /* might be part of a method name */ |
| 3708 | char *t = p; |
| 3709 | |
| 3710 | /* Seeing a ' ' or a '(' is not conclusive evidence |
| 3711 | that we are in the middle of a method name. However, |
| 3712 | finding "-[" or "+[" should be pretty un-ambiguous. |
| 3713 | Unfortunately we have to find it now to decide. */ |
| 3714 | |
| 3715 | while (t > text) |
| 3716 | if (isalnum (t[-1]) || t[-1] == '_' || |
| 3717 | t[-1] == ' ' || t[-1] == ':' || |
| 3718 | t[-1] == '(' || t[-1] == ')') |
| 3719 | --t; |
| 3720 | else |
| 3721 | break; |
| 3722 | |
| 3723 | if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+')) |
| 3724 | p = t - 2; /* method name detected */ |
| 3725 | /* else we leave with p unchanged */ |
| 3726 | } |
| 3727 | } |
| 3728 | break; |
| 3729 | } |
| 3730 | } |
| 3731 | return p; |
| 3732 | } |
| 3733 | |
| 3734 | static void |
| 3735 | completion_list_add_fields (struct symbol *sym, char *sym_text, |
| 3736 | int sym_text_len, char *text, char *word) |
| 3737 | { |
| 3738 | if (SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 3739 | { |
| 3740 | struct type *t = SYMBOL_TYPE (sym); |
| 3741 | enum type_code c = TYPE_CODE (t); |
| 3742 | int j; |
| 3743 | |
| 3744 | if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT) |
| 3745 | for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++) |
| 3746 | if (TYPE_FIELD_NAME (t, j)) |
| 3747 | completion_list_add_name (TYPE_FIELD_NAME (t, j), |
| 3748 | sym_text, sym_text_len, text, word); |
| 3749 | } |
| 3750 | } |
| 3751 | |
| 3752 | /* Type of the user_data argument passed to add_macro_name. The |
| 3753 | contents are simply whatever is needed by |
| 3754 | completion_list_add_name. */ |
| 3755 | struct add_macro_name_data |
| 3756 | { |
| 3757 | char *sym_text; |
| 3758 | int sym_text_len; |
| 3759 | char *text; |
| 3760 | char *word; |
| 3761 | }; |
| 3762 | |
| 3763 | /* A callback used with macro_for_each and macro_for_each_in_scope. |
| 3764 | This adds a macro's name to the current completion list. */ |
| 3765 | static void |
| 3766 | add_macro_name (const char *name, const struct macro_definition *ignore, |
| 3767 | void *user_data) |
| 3768 | { |
| 3769 | struct add_macro_name_data *datum = (struct add_macro_name_data *) user_data; |
| 3770 | completion_list_add_name ((char *) name, |
| 3771 | datum->sym_text, datum->sym_text_len, |
| 3772 | datum->text, datum->word); |
| 3773 | } |
| 3774 | |
| 3775 | char ** |
| 3776 | default_make_symbol_completion_list (char *text, char *word) |
| 3777 | { |
| 3778 | /* Problem: All of the symbols have to be copied because readline |
| 3779 | frees them. I'm not going to worry about this; hopefully there |
| 3780 | won't be that many. */ |
| 3781 | |
| 3782 | struct symbol *sym; |
| 3783 | struct symtab *s; |
| 3784 | struct partial_symtab *ps; |
| 3785 | struct minimal_symbol *msymbol; |
| 3786 | struct objfile *objfile; |
| 3787 | struct block *b; |
| 3788 | const struct block *surrounding_static_block, *surrounding_global_block; |
| 3789 | struct dict_iterator iter; |
| 3790 | struct partial_symbol **psym; |
| 3791 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 3792 | char *sym_text; |
| 3793 | /* Length of sym_text. */ |
| 3794 | int sym_text_len; |
| 3795 | |
| 3796 | /* Now look for the symbol we are supposed to complete on. */ |
| 3797 | { |
| 3798 | char *p; |
| 3799 | char quote_found; |
| 3800 | char *quote_pos = NULL; |
| 3801 | |
| 3802 | /* First see if this is a quoted string. */ |
| 3803 | quote_found = '\0'; |
| 3804 | for (p = text; *p != '\0'; ++p) |
| 3805 | { |
| 3806 | if (quote_found != '\0') |
| 3807 | { |
| 3808 | if (*p == quote_found) |
| 3809 | /* Found close quote. */ |
| 3810 | quote_found = '\0'; |
| 3811 | else if (*p == '\\' && p[1] == quote_found) |
| 3812 | /* A backslash followed by the quote character |
| 3813 | doesn't end the string. */ |
| 3814 | ++p; |
| 3815 | } |
| 3816 | else if (*p == '\'' || *p == '"') |
| 3817 | { |
| 3818 | quote_found = *p; |
| 3819 | quote_pos = p; |
| 3820 | } |
| 3821 | } |
| 3822 | if (quote_found == '\'') |
| 3823 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 3824 | sym_text = quote_pos + 1; |
| 3825 | else if (quote_found == '"') |
| 3826 | /* A double-quoted string is never a symbol, nor does it make sense |
| 3827 | to complete it any other way. */ |
| 3828 | { |
| 3829 | return_val = (char **) xmalloc (sizeof (char *)); |
| 3830 | return_val[0] = NULL; |
| 3831 | return return_val; |
| 3832 | } |
| 3833 | else |
| 3834 | { |
| 3835 | /* It is not a quoted string. Break it based on the characters |
| 3836 | which are in symbols. */ |
| 3837 | while (p > text) |
| 3838 | { |
| 3839 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0' |
| 3840 | || p[-1] == ':') |
| 3841 | --p; |
| 3842 | else |
| 3843 | break; |
| 3844 | } |
| 3845 | sym_text = p; |
| 3846 | } |
| 3847 | } |
| 3848 | |
| 3849 | sym_text_len = strlen (sym_text); |
| 3850 | |
| 3851 | return_val_size = 100; |
| 3852 | return_val_index = 0; |
| 3853 | return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *)); |
| 3854 | return_val[0] = NULL; |
| 3855 | |
| 3856 | /* Look through the partial symtabs for all symbols which begin |
| 3857 | by matching SYM_TEXT. Add each one that you find to the list. */ |
| 3858 | |
| 3859 | ALL_PSYMTABS (objfile, ps) |
| 3860 | { |
| 3861 | /* If the psymtab's been read in we'll get it when we search |
| 3862 | through the blockvector. */ |
| 3863 | if (ps->readin) |
| 3864 | continue; |
| 3865 | |
| 3866 | for (psym = objfile->global_psymbols.list + ps->globals_offset; |
| 3867 | psym < (objfile->global_psymbols.list + ps->globals_offset |
| 3868 | + ps->n_global_syms); |
| 3869 | psym++) |
| 3870 | { |
| 3871 | /* If interrupted, then quit. */ |
| 3872 | QUIT; |
| 3873 | COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word); |
| 3874 | } |
| 3875 | |
| 3876 | for (psym = objfile->static_psymbols.list + ps->statics_offset; |
| 3877 | psym < (objfile->static_psymbols.list + ps->statics_offset |
| 3878 | + ps->n_static_syms); |
| 3879 | psym++) |
| 3880 | { |
| 3881 | QUIT; |
| 3882 | COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word); |
| 3883 | } |
| 3884 | } |
| 3885 | |
| 3886 | /* At this point scan through the misc symbol vectors and add each |
| 3887 | symbol you find to the list. Eventually we want to ignore |
| 3888 | anything that isn't a text symbol (everything else will be |
| 3889 | handled by the psymtab code above). */ |
| 3890 | |
| 3891 | ALL_MSYMBOLS (objfile, msymbol) |
| 3892 | { |
| 3893 | QUIT; |
| 3894 | COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word); |
| 3895 | |
| 3896 | completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word); |
| 3897 | } |
| 3898 | |
| 3899 | /* Search upwards from currently selected frame (so that we can |
| 3900 | complete on local vars). Also catch fields of types defined in |
| 3901 | this places which match our text string. Only complete on types |
| 3902 | visible from current context. */ |
| 3903 | |
| 3904 | b = get_selected_block (0); |
| 3905 | surrounding_static_block = block_static_block (b); |
| 3906 | surrounding_global_block = block_global_block (b); |
| 3907 | if (surrounding_static_block != NULL) |
| 3908 | while (b != surrounding_static_block) |
| 3909 | { |
| 3910 | QUIT; |
| 3911 | |
| 3912 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3913 | { |
| 3914 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, |
| 3915 | word); |
| 3916 | completion_list_add_fields (sym, sym_text, sym_text_len, text, |
| 3917 | word); |
| 3918 | } |
| 3919 | |
| 3920 | /* Stop when we encounter an enclosing function. Do not stop for |
| 3921 | non-inlined functions - the locals of the enclosing function |
| 3922 | are in scope for a nested function. */ |
| 3923 | if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b)) |
| 3924 | break; |
| 3925 | b = BLOCK_SUPERBLOCK (b); |
| 3926 | } |
| 3927 | |
| 3928 | /* Add fields from the file's types; symbols will be added below. */ |
| 3929 | |
| 3930 | if (surrounding_static_block != NULL) |
| 3931 | ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym) |
| 3932 | completion_list_add_fields (sym, sym_text, sym_text_len, text, word); |
| 3933 | |
| 3934 | if (surrounding_global_block != NULL) |
| 3935 | ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym) |
| 3936 | completion_list_add_fields (sym, sym_text, sym_text_len, text, word); |
| 3937 | |
| 3938 | /* Go through the symtabs and check the externs and statics for |
| 3939 | symbols which match. */ |
| 3940 | |
| 3941 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 3942 | { |
| 3943 | QUIT; |
| 3944 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); |
| 3945 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3946 | { |
| 3947 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 3948 | } |
| 3949 | } |
| 3950 | |
| 3951 | ALL_PRIMARY_SYMTABS (objfile, s) |
| 3952 | { |
| 3953 | QUIT; |
| 3954 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 3955 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 3956 | { |
| 3957 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 3958 | } |
| 3959 | } |
| 3960 | |
| 3961 | if (current_language->la_macro_expansion == macro_expansion_c) |
| 3962 | { |
| 3963 | struct macro_scope *scope; |
| 3964 | struct add_macro_name_data datum; |
| 3965 | |
| 3966 | datum.sym_text = sym_text; |
| 3967 | datum.sym_text_len = sym_text_len; |
| 3968 | datum.text = text; |
| 3969 | datum.word = word; |
| 3970 | |
| 3971 | /* Add any macros visible in the default scope. Note that this |
| 3972 | may yield the occasional wrong result, because an expression |
| 3973 | might be evaluated in a scope other than the default. For |
| 3974 | example, if the user types "break file:line if <TAB>", the |
| 3975 | resulting expression will be evaluated at "file:line" -- but |
| 3976 | at there does not seem to be a way to detect this at |
| 3977 | completion time. */ |
| 3978 | scope = default_macro_scope (); |
| 3979 | if (scope) |
| 3980 | { |
| 3981 | macro_for_each_in_scope (scope->file, scope->line, |
| 3982 | add_macro_name, &datum); |
| 3983 | xfree (scope); |
| 3984 | } |
| 3985 | |
| 3986 | /* User-defined macros are always visible. */ |
| 3987 | macro_for_each (macro_user_macros, add_macro_name, &datum); |
| 3988 | } |
| 3989 | |
| 3990 | return (return_val); |
| 3991 | } |
| 3992 | |
| 3993 | /* Return a NULL terminated array of all symbols (regardless of class) |
| 3994 | which begin by matching TEXT. If the answer is no symbols, then |
| 3995 | the return value is an array which contains only a NULL pointer. */ |
| 3996 | |
| 3997 | char ** |
| 3998 | make_symbol_completion_list (char *text, char *word) |
| 3999 | { |
| 4000 | return current_language->la_make_symbol_completion_list (text, word); |
| 4001 | } |
| 4002 | |
| 4003 | /* Like make_symbol_completion_list, but suitable for use as a |
| 4004 | completion function. */ |
| 4005 | |
| 4006 | char ** |
| 4007 | make_symbol_completion_list_fn (struct cmd_list_element *ignore, |
| 4008 | char *text, char *word) |
| 4009 | { |
| 4010 | return make_symbol_completion_list (text, word); |
| 4011 | } |
| 4012 | |
| 4013 | /* Like make_symbol_completion_list, but returns a list of symbols |
| 4014 | defined in a source file FILE. */ |
| 4015 | |
| 4016 | char ** |
| 4017 | make_file_symbol_completion_list (char *text, char *word, char *srcfile) |
| 4018 | { |
| 4019 | struct symbol *sym; |
| 4020 | struct symtab *s; |
| 4021 | struct block *b; |
| 4022 | struct dict_iterator iter; |
| 4023 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 4024 | char *sym_text; |
| 4025 | /* Length of sym_text. */ |
| 4026 | int sym_text_len; |
| 4027 | |
| 4028 | /* Now look for the symbol we are supposed to complete on. |
| 4029 | FIXME: This should be language-specific. */ |
| 4030 | { |
| 4031 | char *p; |
| 4032 | char quote_found; |
| 4033 | char *quote_pos = NULL; |
| 4034 | |
| 4035 | /* First see if this is a quoted string. */ |
| 4036 | quote_found = '\0'; |
| 4037 | for (p = text; *p != '\0'; ++p) |
| 4038 | { |
| 4039 | if (quote_found != '\0') |
| 4040 | { |
| 4041 | if (*p == quote_found) |
| 4042 | /* Found close quote. */ |
| 4043 | quote_found = '\0'; |
| 4044 | else if (*p == '\\' && p[1] == quote_found) |
| 4045 | /* A backslash followed by the quote character |
| 4046 | doesn't end the string. */ |
| 4047 | ++p; |
| 4048 | } |
| 4049 | else if (*p == '\'' || *p == '"') |
| 4050 | { |
| 4051 | quote_found = *p; |
| 4052 | quote_pos = p; |
| 4053 | } |
| 4054 | } |
| 4055 | if (quote_found == '\'') |
| 4056 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 4057 | sym_text = quote_pos + 1; |
| 4058 | else if (quote_found == '"') |
| 4059 | /* A double-quoted string is never a symbol, nor does it make sense |
| 4060 | to complete it any other way. */ |
| 4061 | { |
| 4062 | return_val = (char **) xmalloc (sizeof (char *)); |
| 4063 | return_val[0] = NULL; |
| 4064 | return return_val; |
| 4065 | } |
| 4066 | else |
| 4067 | { |
| 4068 | /* Not a quoted string. */ |
| 4069 | sym_text = language_search_unquoted_string (text, p); |
| 4070 | } |
| 4071 | } |
| 4072 | |
| 4073 | sym_text_len = strlen (sym_text); |
| 4074 | |
| 4075 | return_val_size = 10; |
| 4076 | return_val_index = 0; |
| 4077 | return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *)); |
| 4078 | return_val[0] = NULL; |
| 4079 | |
| 4080 | /* Find the symtab for SRCFILE (this loads it if it was not yet read |
| 4081 | in). */ |
| 4082 | s = lookup_symtab (srcfile); |
| 4083 | if (s == NULL) |
| 4084 | { |
| 4085 | /* Maybe they typed the file with leading directories, while the |
| 4086 | symbol tables record only its basename. */ |
| 4087 | const char *tail = lbasename (srcfile); |
| 4088 | |
| 4089 | if (tail > srcfile) |
| 4090 | s = lookup_symtab (tail); |
| 4091 | } |
| 4092 | |
| 4093 | /* If we have no symtab for that file, return an empty list. */ |
| 4094 | if (s == NULL) |
| 4095 | return (return_val); |
| 4096 | |
| 4097 | /* Go through this symtab and check the externs and statics for |
| 4098 | symbols which match. */ |
| 4099 | |
| 4100 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); |
| 4101 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4102 | { |
| 4103 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4104 | } |
| 4105 | |
| 4106 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 4107 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 4108 | { |
| 4109 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 4110 | } |
| 4111 | |
| 4112 | return (return_val); |
| 4113 | } |
| 4114 | |
| 4115 | /* A helper function for make_source_files_completion_list. It adds |
| 4116 | another file name to a list of possible completions, growing the |
| 4117 | list as necessary. */ |
| 4118 | |
| 4119 | static void |
| 4120 | add_filename_to_list (const char *fname, char *text, char *word, |
| 4121 | char ***list, int *list_used, int *list_alloced) |
| 4122 | { |
| 4123 | char *new; |
| 4124 | size_t fnlen = strlen (fname); |
| 4125 | |
| 4126 | if (*list_used + 1 >= *list_alloced) |
| 4127 | { |
| 4128 | *list_alloced *= 2; |
| 4129 | *list = (char **) xrealloc ((char *) *list, |
| 4130 | *list_alloced * sizeof (char *)); |
| 4131 | } |
| 4132 | |
| 4133 | if (word == text) |
| 4134 | { |
| 4135 | /* Return exactly fname. */ |
| 4136 | new = xmalloc (fnlen + 5); |
| 4137 | strcpy (new, fname); |
| 4138 | } |
| 4139 | else if (word > text) |
| 4140 | { |
| 4141 | /* Return some portion of fname. */ |
| 4142 | new = xmalloc (fnlen + 5); |
| 4143 | strcpy (new, fname + (word - text)); |
| 4144 | } |
| 4145 | else |
| 4146 | { |
| 4147 | /* Return some of TEXT plus fname. */ |
| 4148 | new = xmalloc (fnlen + (text - word) + 5); |
| 4149 | strncpy (new, word, text - word); |
| 4150 | new[text - word] = '\0'; |
| 4151 | strcat (new, fname); |
| 4152 | } |
| 4153 | (*list)[*list_used] = new; |
| 4154 | (*list)[++*list_used] = NULL; |
| 4155 | } |
| 4156 | |
| 4157 | static int |
| 4158 | not_interesting_fname (const char *fname) |
| 4159 | { |
| 4160 | static const char *illegal_aliens[] = { |
| 4161 | "_globals_", /* inserted by coff_symtab_read */ |
| 4162 | NULL |
| 4163 | }; |
| 4164 | int i; |
| 4165 | |
| 4166 | for (i = 0; illegal_aliens[i]; i++) |
| 4167 | { |
| 4168 | if (strcmp (fname, illegal_aliens[i]) == 0) |
| 4169 | return 1; |
| 4170 | } |
| 4171 | return 0; |
| 4172 | } |
| 4173 | |
| 4174 | /* Return a NULL terminated array of all source files whose names |
| 4175 | begin with matching TEXT. The file names are looked up in the |
| 4176 | symbol tables of this program. If the answer is no matchess, then |
| 4177 | the return value is an array which contains only a NULL pointer. */ |
| 4178 | |
| 4179 | char ** |
| 4180 | make_source_files_completion_list (char *text, char *word) |
| 4181 | { |
| 4182 | struct symtab *s; |
| 4183 | struct partial_symtab *ps; |
| 4184 | struct objfile *objfile; |
| 4185 | int first = 1; |
| 4186 | int list_alloced = 1; |
| 4187 | int list_used = 0; |
| 4188 | size_t text_len = strlen (text); |
| 4189 | char **list = (char **) xmalloc (list_alloced * sizeof (char *)); |
| 4190 | const char *base_name; |
| 4191 | |
| 4192 | list[0] = NULL; |
| 4193 | |
| 4194 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 4195 | return list; |
| 4196 | |
| 4197 | ALL_SYMTABS (objfile, s) |
| 4198 | { |
| 4199 | if (not_interesting_fname (s->filename)) |
| 4200 | continue; |
| 4201 | if (!filename_seen (s->filename, 1, &first) |
| 4202 | #if HAVE_DOS_BASED_FILE_SYSTEM |
| 4203 | && strncasecmp (s->filename, text, text_len) == 0 |
| 4204 | #else |
| 4205 | && strncmp (s->filename, text, text_len) == 0 |
| 4206 | #endif |
| 4207 | ) |
| 4208 | { |
| 4209 | /* This file matches for a completion; add it to the current |
| 4210 | list of matches. */ |
| 4211 | add_filename_to_list (s->filename, text, word, |
| 4212 | &list, &list_used, &list_alloced); |
| 4213 | } |
| 4214 | else |
| 4215 | { |
| 4216 | /* NOTE: We allow the user to type a base name when the |
| 4217 | debug info records leading directories, but not the other |
| 4218 | way around. This is what subroutines of breakpoint |
| 4219 | command do when they parse file names. */ |
| 4220 | base_name = lbasename (s->filename); |
| 4221 | if (base_name != s->filename |
| 4222 | && !filename_seen (base_name, 1, &first) |
| 4223 | #if HAVE_DOS_BASED_FILE_SYSTEM |
| 4224 | && strncasecmp (base_name, text, text_len) == 0 |
| 4225 | #else |
| 4226 | && strncmp (base_name, text, text_len) == 0 |
| 4227 | #endif |
| 4228 | ) |
| 4229 | add_filename_to_list (base_name, text, word, |
| 4230 | &list, &list_used, &list_alloced); |
| 4231 | } |
| 4232 | } |
| 4233 | |
| 4234 | ALL_PSYMTABS (objfile, ps) |
| 4235 | { |
| 4236 | if (not_interesting_fname (ps->filename)) |
| 4237 | continue; |
| 4238 | if (!ps->readin) |
| 4239 | { |
| 4240 | if (!filename_seen (ps->filename, 1, &first) |
| 4241 | #if HAVE_DOS_BASED_FILE_SYSTEM |
| 4242 | && strncasecmp (ps->filename, text, text_len) == 0 |
| 4243 | #else |
| 4244 | && strncmp (ps->filename, text, text_len) == 0 |
| 4245 | #endif |
| 4246 | ) |
| 4247 | { |
| 4248 | /* This file matches for a completion; add it to the |
| 4249 | current list of matches. */ |
| 4250 | add_filename_to_list (ps->filename, text, word, |
| 4251 | &list, &list_used, &list_alloced); |
| 4252 | |
| 4253 | } |
| 4254 | else |
| 4255 | { |
| 4256 | base_name = lbasename (ps->filename); |
| 4257 | if (base_name != ps->filename |
| 4258 | && !filename_seen (base_name, 1, &first) |
| 4259 | #if HAVE_DOS_BASED_FILE_SYSTEM |
| 4260 | && strncasecmp (base_name, text, text_len) == 0 |
| 4261 | #else |
| 4262 | && strncmp (base_name, text, text_len) == 0 |
| 4263 | #endif |
| 4264 | ) |
| 4265 | add_filename_to_list (base_name, text, word, |
| 4266 | &list, &list_used, &list_alloced); |
| 4267 | } |
| 4268 | } |
| 4269 | } |
| 4270 | |
| 4271 | return list; |
| 4272 | } |
| 4273 | |
| 4274 | /* Determine if PC is in the prologue of a function. The prologue is the area |
| 4275 | between the first instruction of a function, and the first executable line. |
| 4276 | Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue. |
| 4277 | |
| 4278 | If non-zero, func_start is where we think the prologue starts, possibly |
| 4279 | by previous examination of symbol table information. |
| 4280 | */ |
| 4281 | |
| 4282 | int |
| 4283 | in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start) |
| 4284 | { |
| 4285 | struct symtab_and_line sal; |
| 4286 | CORE_ADDR func_addr, func_end; |
| 4287 | |
| 4288 | /* We have several sources of information we can consult to figure |
| 4289 | this out. |
| 4290 | - Compilers usually emit line number info that marks the prologue |
| 4291 | as its own "source line". So the ending address of that "line" |
| 4292 | is the end of the prologue. If available, this is the most |
| 4293 | reliable method. |
| 4294 | - The minimal symbols and partial symbols, which can usually tell |
| 4295 | us the starting and ending addresses of a function. |
| 4296 | - If we know the function's start address, we can call the |
| 4297 | architecture-defined gdbarch_skip_prologue function to analyze the |
| 4298 | instruction stream and guess where the prologue ends. |
| 4299 | - Our `func_start' argument; if non-zero, this is the caller's |
| 4300 | best guess as to the function's entry point. At the time of |
| 4301 | this writing, handle_inferior_event doesn't get this right, so |
| 4302 | it should be our last resort. */ |
| 4303 | |
| 4304 | /* Consult the partial symbol table, to find which function |
| 4305 | the PC is in. */ |
| 4306 | if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 4307 | { |
| 4308 | CORE_ADDR prologue_end; |
| 4309 | |
| 4310 | /* We don't even have minsym information, so fall back to using |
| 4311 | func_start, if given. */ |
| 4312 | if (! func_start) |
| 4313 | return 1; /* We *might* be in a prologue. */ |
| 4314 | |
| 4315 | prologue_end = gdbarch_skip_prologue (gdbarch, func_start); |
| 4316 | |
| 4317 | return func_start <= pc && pc < prologue_end; |
| 4318 | } |
| 4319 | |
| 4320 | /* If we have line number information for the function, that's |
| 4321 | usually pretty reliable. */ |
| 4322 | sal = find_pc_line (func_addr, 0); |
| 4323 | |
| 4324 | /* Now sal describes the source line at the function's entry point, |
| 4325 | which (by convention) is the prologue. The end of that "line", |
| 4326 | sal.end, is the end of the prologue. |
| 4327 | |
| 4328 | Note that, for functions whose source code is all on a single |
| 4329 | line, the line number information doesn't always end up this way. |
| 4330 | So we must verify that our purported end-of-prologue address is |
| 4331 | *within* the function, not at its start or end. */ |
| 4332 | if (sal.line == 0 |
| 4333 | || sal.end <= func_addr |
| 4334 | || func_end <= sal.end) |
| 4335 | { |
| 4336 | /* We don't have any good line number info, so use the minsym |
| 4337 | information, together with the architecture-specific prologue |
| 4338 | scanning code. */ |
| 4339 | CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr); |
| 4340 | |
| 4341 | return func_addr <= pc && pc < prologue_end; |
| 4342 | } |
| 4343 | |
| 4344 | /* We have line number info, and it looks good. */ |
| 4345 | return func_addr <= pc && pc < sal.end; |
| 4346 | } |
| 4347 | |
| 4348 | /* Given PC at the function's start address, attempt to find the |
| 4349 | prologue end using SAL information. Return zero if the skip fails. |
| 4350 | |
| 4351 | A non-optimized prologue traditionally has one SAL for the function |
| 4352 | and a second for the function body. A single line function has |
| 4353 | them both pointing at the same line. |
| 4354 | |
| 4355 | An optimized prologue is similar but the prologue may contain |
| 4356 | instructions (SALs) from the instruction body. Need to skip those |
| 4357 | while not getting into the function body. |
| 4358 | |
| 4359 | The functions end point and an increasing SAL line are used as |
| 4360 | indicators of the prologue's endpoint. |
| 4361 | |
| 4362 | This code is based on the function refine_prologue_limit (versions |
| 4363 | found in both ia64 and ppc). */ |
| 4364 | |
| 4365 | CORE_ADDR |
| 4366 | skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr) |
| 4367 | { |
| 4368 | struct symtab_and_line prologue_sal; |
| 4369 | CORE_ADDR start_pc; |
| 4370 | CORE_ADDR end_pc; |
| 4371 | struct block *bl; |
| 4372 | |
| 4373 | /* Get an initial range for the function. */ |
| 4374 | find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc); |
| 4375 | start_pc += gdbarch_deprecated_function_start_offset (gdbarch); |
| 4376 | |
| 4377 | prologue_sal = find_pc_line (start_pc, 0); |
| 4378 | if (prologue_sal.line != 0) |
| 4379 | { |
| 4380 | /* For langauges other than assembly, treat two consecutive line |
| 4381 | entries at the same address as a zero-instruction prologue. |
| 4382 | The GNU assembler emits separate line notes for each instruction |
| 4383 | in a multi-instruction macro, but compilers generally will not |
| 4384 | do this. */ |
| 4385 | if (prologue_sal.symtab->language != language_asm) |
| 4386 | { |
| 4387 | struct linetable *linetable = LINETABLE (prologue_sal.symtab); |
| 4388 | int exact; |
| 4389 | int idx = 0; |
| 4390 | |
| 4391 | /* Skip any earlier lines, and any end-of-sequence marker |
| 4392 | from a previous function. */ |
| 4393 | while (linetable->item[idx].pc != prologue_sal.pc |
| 4394 | || linetable->item[idx].line == 0) |
| 4395 | idx++; |
| 4396 | |
| 4397 | if (idx+1 < linetable->nitems |
| 4398 | && linetable->item[idx+1].line != 0 |
| 4399 | && linetable->item[idx+1].pc == start_pc) |
| 4400 | return start_pc; |
| 4401 | } |
| 4402 | |
| 4403 | /* If there is only one sal that covers the entire function, |
| 4404 | then it is probably a single line function, like |
| 4405 | "foo(){}". */ |
| 4406 | if (prologue_sal.end >= end_pc) |
| 4407 | return 0; |
| 4408 | |
| 4409 | while (prologue_sal.end < end_pc) |
| 4410 | { |
| 4411 | struct symtab_and_line sal; |
| 4412 | |
| 4413 | sal = find_pc_line (prologue_sal.end, 0); |
| 4414 | if (sal.line == 0) |
| 4415 | break; |
| 4416 | /* Assume that a consecutive SAL for the same (or larger) |
| 4417 | line mark the prologue -> body transition. */ |
| 4418 | if (sal.line >= prologue_sal.line) |
| 4419 | break; |
| 4420 | |
| 4421 | /* The line number is smaller. Check that it's from the |
| 4422 | same function, not something inlined. If it's inlined, |
| 4423 | then there is no point comparing the line numbers. */ |
| 4424 | bl = block_for_pc (prologue_sal.end); |
| 4425 | while (bl) |
| 4426 | { |
| 4427 | if (block_inlined_p (bl)) |
| 4428 | break; |
| 4429 | if (BLOCK_FUNCTION (bl)) |
| 4430 | { |
| 4431 | bl = NULL; |
| 4432 | break; |
| 4433 | } |
| 4434 | bl = BLOCK_SUPERBLOCK (bl); |
| 4435 | } |
| 4436 | if (bl != NULL) |
| 4437 | break; |
| 4438 | |
| 4439 | /* The case in which compiler's optimizer/scheduler has |
| 4440 | moved instructions into the prologue. We look ahead in |
| 4441 | the function looking for address ranges whose |
| 4442 | corresponding line number is less the first one that we |
| 4443 | found for the function. This is more conservative then |
| 4444 | refine_prologue_limit which scans a large number of SALs |
| 4445 | looking for any in the prologue */ |
| 4446 | prologue_sal = sal; |
| 4447 | } |
| 4448 | } |
| 4449 | |
| 4450 | if (prologue_sal.end < end_pc) |
| 4451 | /* Return the end of this line, or zero if we could not find a |
| 4452 | line. */ |
| 4453 | return prologue_sal.end; |
| 4454 | else |
| 4455 | /* Don't return END_PC, which is past the end of the function. */ |
| 4456 | return prologue_sal.pc; |
| 4457 | } |
| 4458 | \f |
| 4459 | struct symtabs_and_lines |
| 4460 | decode_line_spec (char *string, int funfirstline) |
| 4461 | { |
| 4462 | struct symtabs_and_lines sals; |
| 4463 | struct symtab_and_line cursal; |
| 4464 | |
| 4465 | if (string == 0) |
| 4466 | error (_("Empty line specification.")); |
| 4467 | |
| 4468 | /* We use whatever is set as the current source line. We do not try |
| 4469 | and get a default or it will recursively call us! */ |
| 4470 | cursal = get_current_source_symtab_and_line (); |
| 4471 | |
| 4472 | sals = decode_line_1 (&string, funfirstline, |
| 4473 | cursal.symtab, cursal.line, |
| 4474 | (char ***) NULL, NULL); |
| 4475 | |
| 4476 | if (*string) |
| 4477 | error (_("Junk at end of line specification: %s"), string); |
| 4478 | return sals; |
| 4479 | } |
| 4480 | |
| 4481 | /* Track MAIN */ |
| 4482 | static char *name_of_main; |
| 4483 | |
| 4484 | void |
| 4485 | set_main_name (const char *name) |
| 4486 | { |
| 4487 | if (name_of_main != NULL) |
| 4488 | { |
| 4489 | xfree (name_of_main); |
| 4490 | name_of_main = NULL; |
| 4491 | } |
| 4492 | if (name != NULL) |
| 4493 | { |
| 4494 | name_of_main = xstrdup (name); |
| 4495 | } |
| 4496 | } |
| 4497 | |
| 4498 | /* Deduce the name of the main procedure, and set NAME_OF_MAIN |
| 4499 | accordingly. */ |
| 4500 | |
| 4501 | static void |
| 4502 | find_main_name (void) |
| 4503 | { |
| 4504 | const char *new_main_name; |
| 4505 | |
| 4506 | /* Try to see if the main procedure is in Ada. */ |
| 4507 | /* FIXME: brobecker/2005-03-07: Another way of doing this would |
| 4508 | be to add a new method in the language vector, and call this |
| 4509 | method for each language until one of them returns a non-empty |
| 4510 | name. This would allow us to remove this hard-coded call to |
| 4511 | an Ada function. It is not clear that this is a better approach |
| 4512 | at this point, because all methods need to be written in a way |
| 4513 | such that false positives never be returned. For instance, it is |
| 4514 | important that a method does not return a wrong name for the main |
| 4515 | procedure if the main procedure is actually written in a different |
| 4516 | language. It is easy to guaranty this with Ada, since we use a |
| 4517 | special symbol generated only when the main in Ada to find the name |
| 4518 | of the main procedure. It is difficult however to see how this can |
| 4519 | be guarantied for languages such as C, for instance. This suggests |
| 4520 | that order of call for these methods becomes important, which means |
| 4521 | a more complicated approach. */ |
| 4522 | new_main_name = ada_main_name (); |
| 4523 | if (new_main_name != NULL) |
| 4524 | { |
| 4525 | set_main_name (new_main_name); |
| 4526 | return; |
| 4527 | } |
| 4528 | |
| 4529 | new_main_name = pascal_main_name (); |
| 4530 | if (new_main_name != NULL) |
| 4531 | { |
| 4532 | set_main_name (new_main_name); |
| 4533 | return; |
| 4534 | } |
| 4535 | |
| 4536 | /* The languages above didn't identify the name of the main procedure. |
| 4537 | Fallback to "main". */ |
| 4538 | set_main_name ("main"); |
| 4539 | } |
| 4540 | |
| 4541 | char * |
| 4542 | main_name (void) |
| 4543 | { |
| 4544 | if (name_of_main == NULL) |
| 4545 | find_main_name (); |
| 4546 | |
| 4547 | return name_of_main; |
| 4548 | } |
| 4549 | |
| 4550 | /* Handle ``executable_changed'' events for the symtab module. */ |
| 4551 | |
| 4552 | static void |
| 4553 | symtab_observer_executable_changed (void) |
| 4554 | { |
| 4555 | /* NAME_OF_MAIN may no longer be the same, so reset it for now. */ |
| 4556 | set_main_name (NULL); |
| 4557 | } |
| 4558 | |
| 4559 | /* Helper to expand_line_sal below. Appends new sal to SAL, |
| 4560 | initializing it from SYMTAB, LINENO and PC. */ |
| 4561 | static void |
| 4562 | append_expanded_sal (struct symtabs_and_lines *sal, |
| 4563 | struct symtab *symtab, |
| 4564 | int lineno, CORE_ADDR pc) |
| 4565 | { |
| 4566 | sal->sals = xrealloc (sal->sals, |
| 4567 | sizeof (sal->sals[0]) |
| 4568 | * (sal->nelts + 1)); |
| 4569 | init_sal (sal->sals + sal->nelts); |
| 4570 | sal->sals[sal->nelts].symtab = symtab; |
| 4571 | sal->sals[sal->nelts].section = NULL; |
| 4572 | sal->sals[sal->nelts].end = 0; |
| 4573 | sal->sals[sal->nelts].line = lineno; |
| 4574 | sal->sals[sal->nelts].pc = pc; |
| 4575 | ++sal->nelts; |
| 4576 | } |
| 4577 | |
| 4578 | /* Helper to expand_line_sal below. Search in the symtabs for any |
| 4579 | linetable entry that exactly matches FILENAME and LINENO and append |
| 4580 | them to RET. If there is at least one match, return 1; otherwise, |
| 4581 | return 0, and return the best choice in BEST_ITEM and BEST_SYMTAB. */ |
| 4582 | |
| 4583 | static int |
| 4584 | append_exact_match_to_sals (char *filename, int lineno, |
| 4585 | struct symtabs_and_lines *ret, |
| 4586 | struct linetable_entry **best_item, |
| 4587 | struct symtab **best_symtab) |
| 4588 | { |
| 4589 | struct objfile *objfile; |
| 4590 | struct symtab *symtab; |
| 4591 | int exact = 0; |
| 4592 | int j; |
| 4593 | *best_item = 0; |
| 4594 | *best_symtab = 0; |
| 4595 | |
| 4596 | ALL_SYMTABS (objfile, symtab) |
| 4597 | { |
| 4598 | if (strcmp (filename, symtab->filename) == 0) |
| 4599 | { |
| 4600 | struct linetable *l; |
| 4601 | int len; |
| 4602 | l = LINETABLE (symtab); |
| 4603 | if (!l) |
| 4604 | continue; |
| 4605 | len = l->nitems; |
| 4606 | |
| 4607 | for (j = 0; j < len; j++) |
| 4608 | { |
| 4609 | struct linetable_entry *item = &(l->item[j]); |
| 4610 | |
| 4611 | if (item->line == lineno) |
| 4612 | { |
| 4613 | exact = 1; |
| 4614 | append_expanded_sal (ret, symtab, lineno, item->pc); |
| 4615 | } |
| 4616 | else if (!exact && item->line > lineno |
| 4617 | && (*best_item == NULL |
| 4618 | || item->line < (*best_item)->line)) |
| 4619 | { |
| 4620 | *best_item = item; |
| 4621 | *best_symtab = symtab; |
| 4622 | } |
| 4623 | } |
| 4624 | } |
| 4625 | } |
| 4626 | return exact; |
| 4627 | } |
| 4628 | |
| 4629 | /* Compute a set of all sals in |
| 4630 | the entire program that correspond to same file |
| 4631 | and line as SAL and return those. If there |
| 4632 | are several sals that belong to the same block, |
| 4633 | only one sal for the block is included in results. */ |
| 4634 | |
| 4635 | struct symtabs_and_lines |
| 4636 | expand_line_sal (struct symtab_and_line sal) |
| 4637 | { |
| 4638 | struct symtabs_and_lines ret, this_line; |
| 4639 | int i, j; |
| 4640 | struct objfile *objfile; |
| 4641 | struct partial_symtab *psymtab; |
| 4642 | struct symtab *symtab; |
| 4643 | int lineno; |
| 4644 | int deleted = 0; |
| 4645 | struct block **blocks = NULL; |
| 4646 | int *filter; |
| 4647 | |
| 4648 | ret.nelts = 0; |
| 4649 | ret.sals = NULL; |
| 4650 | |
| 4651 | if (sal.symtab == NULL || sal.line == 0 || sal.pc != 0) |
| 4652 | { |
| 4653 | ret.sals = xmalloc (sizeof (struct symtab_and_line)); |
| 4654 | ret.sals[0] = sal; |
| 4655 | ret.nelts = 1; |
| 4656 | return ret; |
| 4657 | } |
| 4658 | else |
| 4659 | { |
| 4660 | struct linetable_entry *best_item = 0; |
| 4661 | struct symtab *best_symtab = 0; |
| 4662 | int exact = 0; |
| 4663 | |
| 4664 | lineno = sal.line; |
| 4665 | |
| 4666 | /* We need to find all symtabs for a file which name |
| 4667 | is described by sal. We cannot just directly |
| 4668 | iterate over symtabs, since a symtab might not be |
| 4669 | yet created. We also cannot iterate over psymtabs, |
| 4670 | calling PSYMTAB_TO_SYMTAB and working on that symtab, |
| 4671 | since PSYMTAB_TO_SYMTAB will return NULL for psymtab |
| 4672 | corresponding to an included file. Therefore, we do |
| 4673 | first pass over psymtabs, reading in those with |
| 4674 | the right name. Then, we iterate over symtabs, knowing |
| 4675 | that all symtabs we're interested in are loaded. */ |
| 4676 | |
| 4677 | ALL_PSYMTABS (objfile, psymtab) |
| 4678 | { |
| 4679 | if (strcmp (sal.symtab->filename, |
| 4680 | psymtab->filename) == 0) |
| 4681 | PSYMTAB_TO_SYMTAB (psymtab); |
| 4682 | } |
| 4683 | |
| 4684 | /* Now search the symtab for exact matches and append them. If |
| 4685 | none is found, append the best_item and all its exact |
| 4686 | matches. */ |
| 4687 | exact = append_exact_match_to_sals (sal.symtab->filename, lineno, |
| 4688 | &ret, &best_item, &best_symtab); |
| 4689 | if (!exact && best_item) |
| 4690 | append_exact_match_to_sals (best_symtab->filename, best_item->line, |
| 4691 | &ret, &best_item, &best_symtab); |
| 4692 | } |
| 4693 | |
| 4694 | /* For optimized code, compiler can scatter one source line accross |
| 4695 | disjoint ranges of PC values, even when no duplicate functions |
| 4696 | or inline functions are involved. For example, 'for (;;)' inside |
| 4697 | non-template non-inline non-ctor-or-dtor function can result |
| 4698 | in two PC ranges. In this case, we don't want to set breakpoint |
| 4699 | on first PC of each range. To filter such cases, we use containing |
| 4700 | blocks -- for each PC found above we see if there are other PCs |
| 4701 | that are in the same block. If yes, the other PCs are filtered out. */ |
| 4702 | |
| 4703 | filter = alloca (ret.nelts * sizeof (int)); |
| 4704 | blocks = alloca (ret.nelts * sizeof (struct block *)); |
| 4705 | for (i = 0; i < ret.nelts; ++i) |
| 4706 | { |
| 4707 | filter[i] = 1; |
| 4708 | blocks[i] = block_for_pc (ret.sals[i].pc); |
| 4709 | } |
| 4710 | |
| 4711 | for (i = 0; i < ret.nelts; ++i) |
| 4712 | if (blocks[i] != NULL) |
| 4713 | for (j = i+1; j < ret.nelts; ++j) |
| 4714 | if (blocks[j] == blocks[i]) |
| 4715 | { |
| 4716 | filter[j] = 0; |
| 4717 | ++deleted; |
| 4718 | break; |
| 4719 | } |
| 4720 | |
| 4721 | { |
| 4722 | struct symtab_and_line *final = |
| 4723 | xmalloc (sizeof (struct symtab_and_line) * (ret.nelts-deleted)); |
| 4724 | |
| 4725 | for (i = 0, j = 0; i < ret.nelts; ++i) |
| 4726 | if (filter[i]) |
| 4727 | final[j++] = ret.sals[i]; |
| 4728 | |
| 4729 | ret.nelts -= deleted; |
| 4730 | xfree (ret.sals); |
| 4731 | ret.sals = final; |
| 4732 | } |
| 4733 | |
| 4734 | return ret; |
| 4735 | } |
| 4736 | |
| 4737 | |
| 4738 | void |
| 4739 | _initialize_symtab (void) |
| 4740 | { |
| 4741 | add_info ("variables", variables_info, _("\ |
| 4742 | All global and static variable names, or those matching REGEXP.")); |
| 4743 | if (dbx_commands) |
| 4744 | add_com ("whereis", class_info, variables_info, _("\ |
| 4745 | All global and static variable names, or those matching REGEXP.")); |
| 4746 | |
| 4747 | add_info ("functions", functions_info, |
| 4748 | _("All function names, or those matching REGEXP.")); |
| 4749 | |
| 4750 | /* FIXME: This command has at least the following problems: |
| 4751 | 1. It prints builtin types (in a very strange and confusing fashion). |
| 4752 | 2. It doesn't print right, e.g. with |
| 4753 | typedef struct foo *FOO |
| 4754 | type_print prints "FOO" when we want to make it (in this situation) |
| 4755 | print "struct foo *". |
| 4756 | I also think "ptype" or "whatis" is more likely to be useful (but if |
| 4757 | there is much disagreement "info types" can be fixed). */ |
| 4758 | add_info ("types", types_info, |
| 4759 | _("All type names, or those matching REGEXP.")); |
| 4760 | |
| 4761 | add_info ("sources", sources_info, |
| 4762 | _("Source files in the program.")); |
| 4763 | |
| 4764 | add_com ("rbreak", class_breakpoint, rbreak_command, |
| 4765 | _("Set a breakpoint for all functions matching REGEXP.")); |
| 4766 | |
| 4767 | if (xdb_commands) |
| 4768 | { |
| 4769 | add_com ("lf", class_info, sources_info, |
| 4770 | _("Source files in the program")); |
| 4771 | add_com ("lg", class_info, variables_info, _("\ |
| 4772 | All global and static variable names, or those matching REGEXP.")); |
| 4773 | } |
| 4774 | |
| 4775 | add_setshow_enum_cmd ("multiple-symbols", no_class, |
| 4776 | multiple_symbols_modes, &multiple_symbols_mode, |
| 4777 | _("\ |
| 4778 | Set the debugger behavior when more than one symbol are possible matches\n\ |
| 4779 | in an expression."), _("\ |
| 4780 | Show how the debugger handles ambiguities in expressions."), _("\ |
| 4781 | Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."), |
| 4782 | NULL, NULL, &setlist, &showlist); |
| 4783 | |
| 4784 | observer_attach_executable_changed (symtab_observer_executable_changed); |
| 4785 | } |