| 1 | /* Helper routines for C++ support in GDB. |
| 2 | Copyright (C) 2002-2017 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by MontaVista Software. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "cp-support.h" |
| 23 | #include "demangle.h" |
| 24 | #include "gdbcmd.h" |
| 25 | #include "dictionary.h" |
| 26 | #include "objfiles.h" |
| 27 | #include "frame.h" |
| 28 | #include "symtab.h" |
| 29 | #include "block.h" |
| 30 | #include "complaints.h" |
| 31 | #include "gdbtypes.h" |
| 32 | #include "expression.h" |
| 33 | #include "value.h" |
| 34 | #include "cp-abi.h" |
| 35 | #include "namespace.h" |
| 36 | #include <signal.h> |
| 37 | #include "gdb_setjmp.h" |
| 38 | #include "safe-ctype.h" |
| 39 | |
| 40 | #define d_left(dc) (dc)->u.s_binary.left |
| 41 | #define d_right(dc) (dc)->u.s_binary.right |
| 42 | |
| 43 | /* Functions related to demangled name parsing. */ |
| 44 | |
| 45 | static unsigned int cp_find_first_component_aux (const char *name, |
| 46 | int permissive); |
| 47 | |
| 48 | static void demangled_name_complaint (const char *name); |
| 49 | |
| 50 | /* Functions/variables related to overload resolution. */ |
| 51 | |
| 52 | static int sym_return_val_size = -1; |
| 53 | static int sym_return_val_index; |
| 54 | static struct symbol **sym_return_val; |
| 55 | |
| 56 | static void overload_list_add_symbol (struct symbol *sym, |
| 57 | const char *oload_name); |
| 58 | |
| 59 | static void make_symbol_overload_list_using (const char *func_name, |
| 60 | const char *the_namespace); |
| 61 | |
| 62 | static void make_symbol_overload_list_qualified (const char *func_name); |
| 63 | |
| 64 | /* The list of "maint cplus" commands. */ |
| 65 | |
| 66 | struct cmd_list_element *maint_cplus_cmd_list = NULL; |
| 67 | |
| 68 | /* The actual commands. */ |
| 69 | |
| 70 | static void maint_cplus_command (char *arg, int from_tty); |
| 71 | static void first_component_command (char *arg, int from_tty); |
| 72 | |
| 73 | /* A list of typedefs which should not be substituted by replace_typedefs. */ |
| 74 | static const char * const ignore_typedefs[] = |
| 75 | { |
| 76 | "std::istream", "std::iostream", "std::ostream", "std::string" |
| 77 | }; |
| 78 | |
| 79 | static void |
| 80 | replace_typedefs (struct demangle_parse_info *info, |
| 81 | struct demangle_component *ret_comp, |
| 82 | canonicalization_ftype *finder, |
| 83 | void *data); |
| 84 | |
| 85 | /* A convenience function to copy STRING into OBSTACK, returning a pointer |
| 86 | to the newly allocated string and saving the number of bytes saved in LEN. |
| 87 | |
| 88 | It does not copy the terminating '\0' byte! */ |
| 89 | |
| 90 | static char * |
| 91 | copy_string_to_obstack (struct obstack *obstack, const char *string, |
| 92 | long *len) |
| 93 | { |
| 94 | *len = strlen (string); |
| 95 | return (char *) obstack_copy (obstack, string, *len); |
| 96 | } |
| 97 | |
| 98 | /* A cleanup wrapper for cp_demangled_name_parse_free. */ |
| 99 | |
| 100 | static void |
| 101 | do_demangled_name_parse_free_cleanup (void *data) |
| 102 | { |
| 103 | struct demangle_parse_info *info = (struct demangle_parse_info *) data; |
| 104 | |
| 105 | cp_demangled_name_parse_free (info); |
| 106 | } |
| 107 | |
| 108 | /* Create a cleanup for C++ name parsing. */ |
| 109 | |
| 110 | struct cleanup * |
| 111 | make_cleanup_cp_demangled_name_parse_free (struct demangle_parse_info *info) |
| 112 | { |
| 113 | return make_cleanup (do_demangled_name_parse_free_cleanup, info); |
| 114 | } |
| 115 | |
| 116 | /* Return 1 if STRING is clearly already in canonical form. This |
| 117 | function is conservative; things which it does not recognize are |
| 118 | assumed to be non-canonical, and the parser will sort them out |
| 119 | afterwards. This speeds up the critical path for alphanumeric |
| 120 | identifiers. */ |
| 121 | |
| 122 | static int |
| 123 | cp_already_canonical (const char *string) |
| 124 | { |
| 125 | /* Identifier start character [a-zA-Z_]. */ |
| 126 | if (!ISIDST (string[0])) |
| 127 | return 0; |
| 128 | |
| 129 | /* These are the only two identifiers which canonicalize to other |
| 130 | than themselves or an error: unsigned -> unsigned int and |
| 131 | signed -> int. */ |
| 132 | if (string[0] == 'u' && strcmp (&string[1], "nsigned") == 0) |
| 133 | return 0; |
| 134 | else if (string[0] == 's' && strcmp (&string[1], "igned") == 0) |
| 135 | return 0; |
| 136 | |
| 137 | /* Identifier character [a-zA-Z0-9_]. */ |
| 138 | while (ISIDNUM (string[1])) |
| 139 | string++; |
| 140 | |
| 141 | if (string[1] == '\0') |
| 142 | return 1; |
| 143 | else |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /* Inspect the given RET_COMP for its type. If it is a typedef, |
| 148 | replace the node with the typedef's tree. |
| 149 | |
| 150 | Returns 1 if any typedef substitutions were made, 0 otherwise. */ |
| 151 | |
| 152 | static int |
| 153 | inspect_type (struct demangle_parse_info *info, |
| 154 | struct demangle_component *ret_comp, |
| 155 | canonicalization_ftype *finder, |
| 156 | void *data) |
| 157 | { |
| 158 | int i; |
| 159 | char *name; |
| 160 | struct symbol *sym; |
| 161 | |
| 162 | /* Copy the symbol's name from RET_COMP and look it up |
| 163 | in the symbol table. */ |
| 164 | name = (char *) alloca (ret_comp->u.s_name.len + 1); |
| 165 | memcpy (name, ret_comp->u.s_name.s, ret_comp->u.s_name.len); |
| 166 | name[ret_comp->u.s_name.len] = '\0'; |
| 167 | |
| 168 | /* Ignore any typedefs that should not be substituted. */ |
| 169 | for (i = 0; i < ARRAY_SIZE (ignore_typedefs); ++i) |
| 170 | { |
| 171 | if (strcmp (name, ignore_typedefs[i]) == 0) |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | sym = NULL; |
| 176 | |
| 177 | TRY |
| 178 | { |
| 179 | sym = lookup_symbol (name, 0, VAR_DOMAIN, 0).symbol; |
| 180 | } |
| 181 | CATCH (except, RETURN_MASK_ALL) |
| 182 | { |
| 183 | return 0; |
| 184 | } |
| 185 | END_CATCH |
| 186 | |
| 187 | if (sym != NULL) |
| 188 | { |
| 189 | struct type *otype = SYMBOL_TYPE (sym); |
| 190 | |
| 191 | if (finder != NULL) |
| 192 | { |
| 193 | const char *new_name = (*finder) (otype, data); |
| 194 | |
| 195 | if (new_name != NULL) |
| 196 | { |
| 197 | ret_comp->u.s_name.s = new_name; |
| 198 | ret_comp->u.s_name.len = strlen (new_name); |
| 199 | return 1; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* If the type is a typedef or namespace alias, replace it. */ |
| 206 | if (TYPE_CODE (otype) == TYPE_CODE_TYPEDEF |
| 207 | || TYPE_CODE (otype) == TYPE_CODE_NAMESPACE) |
| 208 | { |
| 209 | long len; |
| 210 | int is_anon; |
| 211 | struct type *type; |
| 212 | struct demangle_parse_info *i; |
| 213 | struct ui_file *buf; |
| 214 | |
| 215 | /* Get the real type of the typedef. */ |
| 216 | type = check_typedef (otype); |
| 217 | |
| 218 | /* If the symbol is a namespace and its type name is no different |
| 219 | than the name we looked up, this symbol is not a namespace |
| 220 | alias and does not need to be substituted. */ |
| 221 | if (TYPE_CODE (otype) == TYPE_CODE_NAMESPACE |
| 222 | && strcmp (TYPE_NAME (type), name) == 0) |
| 223 | return 0; |
| 224 | |
| 225 | is_anon = (TYPE_TAG_NAME (type) == NULL |
| 226 | && (TYPE_CODE (type) == TYPE_CODE_ENUM |
| 227 | || TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 228 | || TYPE_CODE (type) == TYPE_CODE_UNION)); |
| 229 | if (is_anon) |
| 230 | { |
| 231 | struct type *last = otype; |
| 232 | |
| 233 | /* Find the last typedef for the type. */ |
| 234 | while (TYPE_TARGET_TYPE (last) != NULL |
| 235 | && (TYPE_CODE (TYPE_TARGET_TYPE (last)) |
| 236 | == TYPE_CODE_TYPEDEF)) |
| 237 | last = TYPE_TARGET_TYPE (last); |
| 238 | |
| 239 | /* If there is only one typedef for this anonymous type, |
| 240 | do not substitute it. */ |
| 241 | if (type == otype) |
| 242 | return 0; |
| 243 | else |
| 244 | /* Use the last typedef seen as the type for this |
| 245 | anonymous type. */ |
| 246 | type = last; |
| 247 | } |
| 248 | |
| 249 | buf = mem_fileopen (); |
| 250 | TRY |
| 251 | { |
| 252 | type_print (type, "", buf, -1); |
| 253 | } |
| 254 | |
| 255 | /* If type_print threw an exception, there is little point |
| 256 | in continuing, so just bow out gracefully. */ |
| 257 | CATCH (except, RETURN_MASK_ERROR) |
| 258 | { |
| 259 | ui_file_delete (buf); |
| 260 | return 0; |
| 261 | } |
| 262 | END_CATCH |
| 263 | |
| 264 | name = ui_file_obsavestring (buf, &info->obstack, &len); |
| 265 | ui_file_delete (buf); |
| 266 | |
| 267 | /* Turn the result into a new tree. Note that this |
| 268 | tree will contain pointers into NAME, so NAME cannot |
| 269 | be free'd until all typedef conversion is done and |
| 270 | the final result is converted into a string. */ |
| 271 | i = cp_demangled_name_to_comp (name, NULL); |
| 272 | if (i != NULL) |
| 273 | { |
| 274 | /* Merge the two trees. */ |
| 275 | cp_merge_demangle_parse_infos (info, ret_comp, i); |
| 276 | |
| 277 | /* Replace any newly introduced typedefs -- but not |
| 278 | if the type is anonymous (that would lead to infinite |
| 279 | looping). */ |
| 280 | if (!is_anon) |
| 281 | replace_typedefs (info, ret_comp, finder, data); |
| 282 | } |
| 283 | else |
| 284 | { |
| 285 | /* This shouldn't happen unless the type printer has |
| 286 | output something that the name parser cannot grok. |
| 287 | Nonetheless, an ounce of prevention... |
| 288 | |
| 289 | Canonicalize the name again, and store it in the |
| 290 | current node (RET_COMP). */ |
| 291 | std::string canon = cp_canonicalize_string_no_typedefs (name); |
| 292 | |
| 293 | if (!canon.empty ()) |
| 294 | { |
| 295 | /* Copy the canonicalization into the obstack. */ |
| 296 | name = copy_string_to_obstack (&info->obstack, canon.c_str (), &len); |
| 297 | } |
| 298 | |
| 299 | ret_comp->u.s_name.s = name; |
| 300 | ret_comp->u.s_name.len = len; |
| 301 | } |
| 302 | |
| 303 | return 1; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | /* Replace any typedefs appearing in the qualified name |
| 311 | (DEMANGLE_COMPONENT_QUAL_NAME) represented in RET_COMP for the name parse |
| 312 | given in INFO. */ |
| 313 | |
| 314 | static void |
| 315 | replace_typedefs_qualified_name (struct demangle_parse_info *info, |
| 316 | struct demangle_component *ret_comp, |
| 317 | canonicalization_ftype *finder, |
| 318 | void *data) |
| 319 | { |
| 320 | long len; |
| 321 | char *name; |
| 322 | struct ui_file *buf = mem_fileopen (); |
| 323 | struct demangle_component *comp = ret_comp; |
| 324 | |
| 325 | /* Walk each node of the qualified name, reconstructing the name of |
| 326 | this element. With every node, check for any typedef substitutions. |
| 327 | If a substitution has occurred, replace the qualified name node |
| 328 | with a DEMANGLE_COMPONENT_NAME node representing the new, typedef- |
| 329 | substituted name. */ |
| 330 | while (comp->type == DEMANGLE_COMPONENT_QUAL_NAME) |
| 331 | { |
| 332 | if (d_left (comp)->type == DEMANGLE_COMPONENT_NAME) |
| 333 | { |
| 334 | struct demangle_component newobj; |
| 335 | |
| 336 | ui_file_write (buf, d_left (comp)->u.s_name.s, |
| 337 | d_left (comp)->u.s_name.len); |
| 338 | name = ui_file_obsavestring (buf, &info->obstack, &len); |
| 339 | newobj.type = DEMANGLE_COMPONENT_NAME; |
| 340 | newobj.u.s_name.s = name; |
| 341 | newobj.u.s_name.len = len; |
| 342 | if (inspect_type (info, &newobj, finder, data)) |
| 343 | { |
| 344 | char *n, *s; |
| 345 | long slen; |
| 346 | |
| 347 | /* A typedef was substituted in NEW. Convert it to a |
| 348 | string and replace the top DEMANGLE_COMPONENT_QUAL_NAME |
| 349 | node. */ |
| 350 | |
| 351 | ui_file_rewind (buf); |
| 352 | n = cp_comp_to_string (&newobj, 100); |
| 353 | if (n == NULL) |
| 354 | { |
| 355 | /* If something went astray, abort typedef substitutions. */ |
| 356 | ui_file_delete (buf); |
| 357 | return; |
| 358 | } |
| 359 | |
| 360 | s = copy_string_to_obstack (&info->obstack, n, &slen); |
| 361 | xfree (n); |
| 362 | |
| 363 | d_left (ret_comp)->type = DEMANGLE_COMPONENT_NAME; |
| 364 | d_left (ret_comp)->u.s_name.s = s; |
| 365 | d_left (ret_comp)->u.s_name.len = slen; |
| 366 | d_right (ret_comp) = d_right (comp); |
| 367 | comp = ret_comp; |
| 368 | continue; |
| 369 | } |
| 370 | } |
| 371 | else |
| 372 | { |
| 373 | /* The current node is not a name, so simply replace any |
| 374 | typedefs in it. Then print it to the stream to continue |
| 375 | checking for more typedefs in the tree. */ |
| 376 | replace_typedefs (info, d_left (comp), finder, data); |
| 377 | name = cp_comp_to_string (d_left (comp), 100); |
| 378 | if (name == NULL) |
| 379 | { |
| 380 | /* If something went astray, abort typedef substitutions. */ |
| 381 | ui_file_delete (buf); |
| 382 | return; |
| 383 | } |
| 384 | fputs_unfiltered (name, buf); |
| 385 | xfree (name); |
| 386 | } |
| 387 | |
| 388 | ui_file_write (buf, "::", 2); |
| 389 | comp = d_right (comp); |
| 390 | } |
| 391 | |
| 392 | /* If the next component is DEMANGLE_COMPONENT_NAME, save the qualified |
| 393 | name assembled above and append the name given by COMP. Then use this |
| 394 | reassembled name to check for a typedef. */ |
| 395 | |
| 396 | if (comp->type == DEMANGLE_COMPONENT_NAME) |
| 397 | { |
| 398 | ui_file_write (buf, comp->u.s_name.s, comp->u.s_name.len); |
| 399 | name = ui_file_obsavestring (buf, &info->obstack, &len); |
| 400 | |
| 401 | /* Replace the top (DEMANGLE_COMPONENT_QUAL_NAME) node |
| 402 | with a DEMANGLE_COMPONENT_NAME node containing the whole |
| 403 | name. */ |
| 404 | ret_comp->type = DEMANGLE_COMPONENT_NAME; |
| 405 | ret_comp->u.s_name.s = name; |
| 406 | ret_comp->u.s_name.len = len; |
| 407 | inspect_type (info, ret_comp, finder, data); |
| 408 | } |
| 409 | else |
| 410 | replace_typedefs (info, comp, finder, data); |
| 411 | |
| 412 | ui_file_delete (buf); |
| 413 | } |
| 414 | |
| 415 | |
| 416 | /* A function to check const and volatile qualifiers for argument types. |
| 417 | |
| 418 | "Parameter declarations that differ only in the presence |
| 419 | or absence of `const' and/or `volatile' are equivalent." |
| 420 | C++ Standard N3290, clause 13.1.3 #4. */ |
| 421 | |
| 422 | static void |
| 423 | check_cv_qualifiers (struct demangle_component *ret_comp) |
| 424 | { |
| 425 | while (d_left (ret_comp) != NULL |
| 426 | && (d_left (ret_comp)->type == DEMANGLE_COMPONENT_CONST |
| 427 | || d_left (ret_comp)->type == DEMANGLE_COMPONENT_VOLATILE)) |
| 428 | { |
| 429 | d_left (ret_comp) = d_left (d_left (ret_comp)); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | /* Walk the parse tree given by RET_COMP, replacing any typedefs with |
| 434 | their basic types. */ |
| 435 | |
| 436 | static void |
| 437 | replace_typedefs (struct demangle_parse_info *info, |
| 438 | struct demangle_component *ret_comp, |
| 439 | canonicalization_ftype *finder, |
| 440 | void *data) |
| 441 | { |
| 442 | if (ret_comp) |
| 443 | { |
| 444 | if (finder != NULL |
| 445 | && (ret_comp->type == DEMANGLE_COMPONENT_NAME |
| 446 | || ret_comp->type == DEMANGLE_COMPONENT_QUAL_NAME |
| 447 | || ret_comp->type == DEMANGLE_COMPONENT_TEMPLATE |
| 448 | || ret_comp->type == DEMANGLE_COMPONENT_BUILTIN_TYPE)) |
| 449 | { |
| 450 | char *local_name = cp_comp_to_string (ret_comp, 10); |
| 451 | |
| 452 | if (local_name != NULL) |
| 453 | { |
| 454 | struct symbol *sym = NULL; |
| 455 | |
| 456 | sym = NULL; |
| 457 | TRY |
| 458 | { |
| 459 | sym = lookup_symbol (local_name, 0, VAR_DOMAIN, 0).symbol; |
| 460 | } |
| 461 | CATCH (except, RETURN_MASK_ALL) |
| 462 | { |
| 463 | } |
| 464 | END_CATCH |
| 465 | |
| 466 | xfree (local_name); |
| 467 | |
| 468 | if (sym != NULL) |
| 469 | { |
| 470 | struct type *otype = SYMBOL_TYPE (sym); |
| 471 | const char *new_name = (*finder) (otype, data); |
| 472 | |
| 473 | if (new_name != NULL) |
| 474 | { |
| 475 | ret_comp->type = DEMANGLE_COMPONENT_NAME; |
| 476 | ret_comp->u.s_name.s = new_name; |
| 477 | ret_comp->u.s_name.len = strlen (new_name); |
| 478 | return; |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | switch (ret_comp->type) |
| 485 | { |
| 486 | case DEMANGLE_COMPONENT_ARGLIST: |
| 487 | check_cv_qualifiers (ret_comp); |
| 488 | /* Fall through */ |
| 489 | |
| 490 | case DEMANGLE_COMPONENT_FUNCTION_TYPE: |
| 491 | case DEMANGLE_COMPONENT_TEMPLATE: |
| 492 | case DEMANGLE_COMPONENT_TEMPLATE_ARGLIST: |
| 493 | case DEMANGLE_COMPONENT_TYPED_NAME: |
| 494 | replace_typedefs (info, d_left (ret_comp), finder, data); |
| 495 | replace_typedefs (info, d_right (ret_comp), finder, data); |
| 496 | break; |
| 497 | |
| 498 | case DEMANGLE_COMPONENT_NAME: |
| 499 | inspect_type (info, ret_comp, finder, data); |
| 500 | break; |
| 501 | |
| 502 | case DEMANGLE_COMPONENT_QUAL_NAME: |
| 503 | replace_typedefs_qualified_name (info, ret_comp, finder, data); |
| 504 | break; |
| 505 | |
| 506 | case DEMANGLE_COMPONENT_LOCAL_NAME: |
| 507 | case DEMANGLE_COMPONENT_CTOR: |
| 508 | case DEMANGLE_COMPONENT_ARRAY_TYPE: |
| 509 | case DEMANGLE_COMPONENT_PTRMEM_TYPE: |
| 510 | replace_typedefs (info, d_right (ret_comp), finder, data); |
| 511 | break; |
| 512 | |
| 513 | case DEMANGLE_COMPONENT_CONST: |
| 514 | case DEMANGLE_COMPONENT_RESTRICT: |
| 515 | case DEMANGLE_COMPONENT_VOLATILE: |
| 516 | case DEMANGLE_COMPONENT_VOLATILE_THIS: |
| 517 | case DEMANGLE_COMPONENT_CONST_THIS: |
| 518 | case DEMANGLE_COMPONENT_RESTRICT_THIS: |
| 519 | case DEMANGLE_COMPONENT_POINTER: |
| 520 | case DEMANGLE_COMPONENT_REFERENCE: |
| 521 | replace_typedefs (info, d_left (ret_comp), finder, data); |
| 522 | break; |
| 523 | |
| 524 | default: |
| 525 | break; |
| 526 | } |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /* Parse STRING and convert it to canonical form, resolving any |
| 531 | typedefs. If parsing fails, or if STRING is already canonical, |
| 532 | return the empty string. Otherwise return the canonical form. If |
| 533 | FINDER is not NULL, then type components are passed to FINDER to be |
| 534 | looked up. DATA is passed verbatim to FINDER. */ |
| 535 | |
| 536 | std::string |
| 537 | cp_canonicalize_string_full (const char *string, |
| 538 | canonicalization_ftype *finder, |
| 539 | void *data) |
| 540 | { |
| 541 | std::string ret; |
| 542 | unsigned int estimated_len; |
| 543 | struct demangle_parse_info *info; |
| 544 | |
| 545 | estimated_len = strlen (string) * 2; |
| 546 | info = cp_demangled_name_to_comp (string, NULL); |
| 547 | if (info != NULL) |
| 548 | { |
| 549 | /* Replace all the typedefs in the tree. */ |
| 550 | replace_typedefs (info, info->tree, finder, data); |
| 551 | |
| 552 | /* Convert the tree back into a string. */ |
| 553 | ret = cp_comp_to_string (info->tree, estimated_len); |
| 554 | gdb_assert (!ret.empty ()); |
| 555 | |
| 556 | /* Free the parse information. */ |
| 557 | cp_demangled_name_parse_free (info); |
| 558 | |
| 559 | /* Finally, compare the original string with the computed |
| 560 | name, returning NULL if they are the same. */ |
| 561 | if (ret == string) |
| 562 | return std::string (); |
| 563 | } |
| 564 | |
| 565 | return ret; |
| 566 | } |
| 567 | |
| 568 | /* Like cp_canonicalize_string_full, but always passes NULL for |
| 569 | FINDER. */ |
| 570 | |
| 571 | std::string |
| 572 | cp_canonicalize_string_no_typedefs (const char *string) |
| 573 | { |
| 574 | return cp_canonicalize_string_full (string, NULL, NULL); |
| 575 | } |
| 576 | |
| 577 | /* Parse STRING and convert it to canonical form. If parsing fails, |
| 578 | or if STRING is already canonical, return the empty string. |
| 579 | Otherwise return the canonical form. */ |
| 580 | |
| 581 | std::string |
| 582 | cp_canonicalize_string (const char *string) |
| 583 | { |
| 584 | struct demangle_parse_info *info; |
| 585 | unsigned int estimated_len; |
| 586 | |
| 587 | if (cp_already_canonical (string)) |
| 588 | return std::string (); |
| 589 | |
| 590 | info = cp_demangled_name_to_comp (string, NULL); |
| 591 | if (info == NULL) |
| 592 | return std::string (); |
| 593 | |
| 594 | estimated_len = strlen (string) * 2; |
| 595 | std::string ret = cp_comp_to_string (info->tree, estimated_len); |
| 596 | cp_demangled_name_parse_free (info); |
| 597 | |
| 598 | if (ret.empty ()) |
| 599 | { |
| 600 | warning (_("internal error: string \"%s\" failed to be canonicalized"), |
| 601 | string); |
| 602 | return std::string (); |
| 603 | } |
| 604 | |
| 605 | if (ret == string) |
| 606 | return std::string (); |
| 607 | |
| 608 | return ret; |
| 609 | } |
| 610 | |
| 611 | /* Convert a mangled name to a demangle_component tree. *MEMORY is |
| 612 | set to the block of used memory that should be freed when finished |
| 613 | with the tree. DEMANGLED_P is set to the char * that should be |
| 614 | freed when finished with the tree, or NULL if none was needed. |
| 615 | OPTIONS will be passed to the demangler. */ |
| 616 | |
| 617 | static struct demangle_parse_info * |
| 618 | mangled_name_to_comp (const char *mangled_name, int options, |
| 619 | void **memory, char **demangled_p) |
| 620 | { |
| 621 | char *demangled_name; |
| 622 | struct demangle_parse_info *info; |
| 623 | |
| 624 | /* If it looks like a v3 mangled name, then try to go directly |
| 625 | to trees. */ |
| 626 | if (mangled_name[0] == '_' && mangled_name[1] == 'Z') |
| 627 | { |
| 628 | struct demangle_component *ret; |
| 629 | |
| 630 | ret = cplus_demangle_v3_components (mangled_name, |
| 631 | options, memory); |
| 632 | if (ret) |
| 633 | { |
| 634 | info = cp_new_demangle_parse_info (); |
| 635 | info->tree = ret; |
| 636 | *demangled_p = NULL; |
| 637 | return info; |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | /* If it doesn't, or if that failed, then try to demangle the |
| 642 | name. */ |
| 643 | demangled_name = gdb_demangle (mangled_name, options); |
| 644 | if (demangled_name == NULL) |
| 645 | return NULL; |
| 646 | |
| 647 | /* If we could demangle the name, parse it to build the component |
| 648 | tree. */ |
| 649 | info = cp_demangled_name_to_comp (demangled_name, NULL); |
| 650 | |
| 651 | if (info == NULL) |
| 652 | { |
| 653 | xfree (demangled_name); |
| 654 | return NULL; |
| 655 | } |
| 656 | |
| 657 | *demangled_p = demangled_name; |
| 658 | return info; |
| 659 | } |
| 660 | |
| 661 | /* Return the name of the class containing method PHYSNAME. */ |
| 662 | |
| 663 | char * |
| 664 | cp_class_name_from_physname (const char *physname) |
| 665 | { |
| 666 | void *storage = NULL; |
| 667 | char *demangled_name = NULL, *ret; |
| 668 | struct demangle_component *ret_comp, *prev_comp, *cur_comp; |
| 669 | struct demangle_parse_info *info; |
| 670 | int done; |
| 671 | |
| 672 | info = mangled_name_to_comp (physname, DMGL_ANSI, |
| 673 | &storage, &demangled_name); |
| 674 | if (info == NULL) |
| 675 | return NULL; |
| 676 | |
| 677 | done = 0; |
| 678 | ret_comp = info->tree; |
| 679 | |
| 680 | /* First strip off any qualifiers, if we have a function or |
| 681 | method. */ |
| 682 | while (!done) |
| 683 | switch (ret_comp->type) |
| 684 | { |
| 685 | case DEMANGLE_COMPONENT_CONST: |
| 686 | case DEMANGLE_COMPONENT_RESTRICT: |
| 687 | case DEMANGLE_COMPONENT_VOLATILE: |
| 688 | case DEMANGLE_COMPONENT_CONST_THIS: |
| 689 | case DEMANGLE_COMPONENT_RESTRICT_THIS: |
| 690 | case DEMANGLE_COMPONENT_VOLATILE_THIS: |
| 691 | case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL: |
| 692 | ret_comp = d_left (ret_comp); |
| 693 | break; |
| 694 | default: |
| 695 | done = 1; |
| 696 | break; |
| 697 | } |
| 698 | |
| 699 | /* If what we have now is a function, discard the argument list. */ |
| 700 | if (ret_comp->type == DEMANGLE_COMPONENT_TYPED_NAME) |
| 701 | ret_comp = d_left (ret_comp); |
| 702 | |
| 703 | /* If what we have now is a template, strip off the template |
| 704 | arguments. The left subtree may be a qualified name. */ |
| 705 | if (ret_comp->type == DEMANGLE_COMPONENT_TEMPLATE) |
| 706 | ret_comp = d_left (ret_comp); |
| 707 | |
| 708 | /* What we have now should be a name, possibly qualified. |
| 709 | Additional qualifiers could live in the left subtree or the right |
| 710 | subtree. Find the last piece. */ |
| 711 | done = 0; |
| 712 | prev_comp = NULL; |
| 713 | cur_comp = ret_comp; |
| 714 | while (!done) |
| 715 | switch (cur_comp->type) |
| 716 | { |
| 717 | case DEMANGLE_COMPONENT_QUAL_NAME: |
| 718 | case DEMANGLE_COMPONENT_LOCAL_NAME: |
| 719 | prev_comp = cur_comp; |
| 720 | cur_comp = d_right (cur_comp); |
| 721 | break; |
| 722 | case DEMANGLE_COMPONENT_TEMPLATE: |
| 723 | case DEMANGLE_COMPONENT_NAME: |
| 724 | case DEMANGLE_COMPONENT_CTOR: |
| 725 | case DEMANGLE_COMPONENT_DTOR: |
| 726 | case DEMANGLE_COMPONENT_OPERATOR: |
| 727 | case DEMANGLE_COMPONENT_EXTENDED_OPERATOR: |
| 728 | done = 1; |
| 729 | break; |
| 730 | default: |
| 731 | done = 1; |
| 732 | cur_comp = NULL; |
| 733 | break; |
| 734 | } |
| 735 | |
| 736 | ret = NULL; |
| 737 | if (cur_comp != NULL && prev_comp != NULL) |
| 738 | { |
| 739 | /* We want to discard the rightmost child of PREV_COMP. */ |
| 740 | *prev_comp = *d_left (prev_comp); |
| 741 | /* The ten is completely arbitrary; we don't have a good |
| 742 | estimate. */ |
| 743 | ret = cp_comp_to_string (ret_comp, 10); |
| 744 | } |
| 745 | |
| 746 | xfree (storage); |
| 747 | xfree (demangled_name); |
| 748 | cp_demangled_name_parse_free (info); |
| 749 | return ret; |
| 750 | } |
| 751 | |
| 752 | /* Return the child of COMP which is the basename of a method, |
| 753 | variable, et cetera. All scope qualifiers are discarded, but |
| 754 | template arguments will be included. The component tree may be |
| 755 | modified. */ |
| 756 | |
| 757 | static struct demangle_component * |
| 758 | unqualified_name_from_comp (struct demangle_component *comp) |
| 759 | { |
| 760 | struct demangle_component *ret_comp = comp, *last_template; |
| 761 | int done; |
| 762 | |
| 763 | done = 0; |
| 764 | last_template = NULL; |
| 765 | while (!done) |
| 766 | switch (ret_comp->type) |
| 767 | { |
| 768 | case DEMANGLE_COMPONENT_QUAL_NAME: |
| 769 | case DEMANGLE_COMPONENT_LOCAL_NAME: |
| 770 | ret_comp = d_right (ret_comp); |
| 771 | break; |
| 772 | case DEMANGLE_COMPONENT_TYPED_NAME: |
| 773 | ret_comp = d_left (ret_comp); |
| 774 | break; |
| 775 | case DEMANGLE_COMPONENT_TEMPLATE: |
| 776 | gdb_assert (last_template == NULL); |
| 777 | last_template = ret_comp; |
| 778 | ret_comp = d_left (ret_comp); |
| 779 | break; |
| 780 | case DEMANGLE_COMPONENT_CONST: |
| 781 | case DEMANGLE_COMPONENT_RESTRICT: |
| 782 | case DEMANGLE_COMPONENT_VOLATILE: |
| 783 | case DEMANGLE_COMPONENT_CONST_THIS: |
| 784 | case DEMANGLE_COMPONENT_RESTRICT_THIS: |
| 785 | case DEMANGLE_COMPONENT_VOLATILE_THIS: |
| 786 | case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL: |
| 787 | ret_comp = d_left (ret_comp); |
| 788 | break; |
| 789 | case DEMANGLE_COMPONENT_NAME: |
| 790 | case DEMANGLE_COMPONENT_CTOR: |
| 791 | case DEMANGLE_COMPONENT_DTOR: |
| 792 | case DEMANGLE_COMPONENT_OPERATOR: |
| 793 | case DEMANGLE_COMPONENT_EXTENDED_OPERATOR: |
| 794 | done = 1; |
| 795 | break; |
| 796 | default: |
| 797 | return NULL; |
| 798 | break; |
| 799 | } |
| 800 | |
| 801 | if (last_template) |
| 802 | { |
| 803 | d_left (last_template) = ret_comp; |
| 804 | return last_template; |
| 805 | } |
| 806 | |
| 807 | return ret_comp; |
| 808 | } |
| 809 | |
| 810 | /* Return the name of the method whose linkage name is PHYSNAME. */ |
| 811 | |
| 812 | char * |
| 813 | method_name_from_physname (const char *physname) |
| 814 | { |
| 815 | void *storage = NULL; |
| 816 | char *demangled_name = NULL, *ret; |
| 817 | struct demangle_component *ret_comp; |
| 818 | struct demangle_parse_info *info; |
| 819 | |
| 820 | info = mangled_name_to_comp (physname, DMGL_ANSI, |
| 821 | &storage, &demangled_name); |
| 822 | if (info == NULL) |
| 823 | return NULL; |
| 824 | |
| 825 | ret_comp = unqualified_name_from_comp (info->tree); |
| 826 | |
| 827 | ret = NULL; |
| 828 | if (ret_comp != NULL) |
| 829 | /* The ten is completely arbitrary; we don't have a good |
| 830 | estimate. */ |
| 831 | ret = cp_comp_to_string (ret_comp, 10); |
| 832 | |
| 833 | xfree (storage); |
| 834 | xfree (demangled_name); |
| 835 | cp_demangled_name_parse_free (info); |
| 836 | return ret; |
| 837 | } |
| 838 | |
| 839 | /* If FULL_NAME is the demangled name of a C++ function (including an |
| 840 | arg list, possibly including namespace/class qualifications), |
| 841 | return a new string containing only the function name (without the |
| 842 | arg list/class qualifications). Otherwise, return NULL. The |
| 843 | caller is responsible for freeing the memory in question. */ |
| 844 | |
| 845 | char * |
| 846 | cp_func_name (const char *full_name) |
| 847 | { |
| 848 | char *ret; |
| 849 | struct demangle_component *ret_comp; |
| 850 | struct demangle_parse_info *info; |
| 851 | |
| 852 | info = cp_demangled_name_to_comp (full_name, NULL); |
| 853 | if (!info) |
| 854 | return NULL; |
| 855 | |
| 856 | ret_comp = unqualified_name_from_comp (info->tree); |
| 857 | |
| 858 | ret = NULL; |
| 859 | if (ret_comp != NULL) |
| 860 | ret = cp_comp_to_string (ret_comp, 10); |
| 861 | |
| 862 | cp_demangled_name_parse_free (info); |
| 863 | return ret; |
| 864 | } |
| 865 | |
| 866 | /* DEMANGLED_NAME is the name of a function, including parameters and |
| 867 | (optionally) a return type. Return the name of the function without |
| 868 | parameters or return type, or NULL if we can not parse the name. */ |
| 869 | |
| 870 | char * |
| 871 | cp_remove_params (const char *demangled_name) |
| 872 | { |
| 873 | int done = 0; |
| 874 | struct demangle_component *ret_comp; |
| 875 | struct demangle_parse_info *info; |
| 876 | char *ret = NULL; |
| 877 | |
| 878 | if (demangled_name == NULL) |
| 879 | return NULL; |
| 880 | |
| 881 | info = cp_demangled_name_to_comp (demangled_name, NULL); |
| 882 | if (info == NULL) |
| 883 | return NULL; |
| 884 | |
| 885 | /* First strip off any qualifiers, if we have a function or method. */ |
| 886 | ret_comp = info->tree; |
| 887 | while (!done) |
| 888 | switch (ret_comp->type) |
| 889 | { |
| 890 | case DEMANGLE_COMPONENT_CONST: |
| 891 | case DEMANGLE_COMPONENT_RESTRICT: |
| 892 | case DEMANGLE_COMPONENT_VOLATILE: |
| 893 | case DEMANGLE_COMPONENT_CONST_THIS: |
| 894 | case DEMANGLE_COMPONENT_RESTRICT_THIS: |
| 895 | case DEMANGLE_COMPONENT_VOLATILE_THIS: |
| 896 | case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL: |
| 897 | ret_comp = d_left (ret_comp); |
| 898 | break; |
| 899 | default: |
| 900 | done = 1; |
| 901 | break; |
| 902 | } |
| 903 | |
| 904 | /* What we have now should be a function. Return its name. */ |
| 905 | if (ret_comp->type == DEMANGLE_COMPONENT_TYPED_NAME) |
| 906 | ret = cp_comp_to_string (d_left (ret_comp), 10); |
| 907 | |
| 908 | cp_demangled_name_parse_free (info); |
| 909 | return ret; |
| 910 | } |
| 911 | |
| 912 | /* Here are some random pieces of trivia to keep in mind while trying |
| 913 | to take apart demangled names: |
| 914 | |
| 915 | - Names can contain function arguments or templates, so the process |
| 916 | has to be, to some extent recursive: maybe keep track of your |
| 917 | depth based on encountering <> and (). |
| 918 | |
| 919 | - Parentheses don't just have to happen at the end of a name: they |
| 920 | can occur even if the name in question isn't a function, because |
| 921 | a template argument might be a type that's a function. |
| 922 | |
| 923 | - Conversely, even if you're trying to deal with a function, its |
| 924 | demangled name might not end with ')': it could be a const or |
| 925 | volatile class method, in which case it ends with "const" or |
| 926 | "volatile". |
| 927 | |
| 928 | - Parentheses are also used in anonymous namespaces: a variable |
| 929 | 'foo' in an anonymous namespace gets demangled as "(anonymous |
| 930 | namespace)::foo". |
| 931 | |
| 932 | - And operator names can contain parentheses or angle brackets. */ |
| 933 | |
| 934 | /* FIXME: carlton/2003-03-13: We have several functions here with |
| 935 | overlapping functionality; can we combine them? Also, do they |
| 936 | handle all the above considerations correctly? */ |
| 937 | |
| 938 | |
| 939 | /* This returns the length of first component of NAME, which should be |
| 940 | the demangled name of a C++ variable/function/method/etc. |
| 941 | Specifically, it returns the index of the first colon forming the |
| 942 | boundary of the first component: so, given 'A::foo' or 'A::B::foo' |
| 943 | it returns the 1, and given 'foo', it returns 0. */ |
| 944 | |
| 945 | /* The character in NAME indexed by the return value is guaranteed to |
| 946 | always be either ':' or '\0'. */ |
| 947 | |
| 948 | /* NOTE: carlton/2003-03-13: This function is currently only intended |
| 949 | for internal use: it's probably not entirely safe when called on |
| 950 | user-generated input, because some of the 'index += 2' lines in |
| 951 | cp_find_first_component_aux might go past the end of malformed |
| 952 | input. */ |
| 953 | |
| 954 | unsigned int |
| 955 | cp_find_first_component (const char *name) |
| 956 | { |
| 957 | return cp_find_first_component_aux (name, 0); |
| 958 | } |
| 959 | |
| 960 | /* Helper function for cp_find_first_component. Like that function, |
| 961 | it returns the length of the first component of NAME, but to make |
| 962 | the recursion easier, it also stops if it reaches an unexpected ')' |
| 963 | or '>' if the value of PERMISSIVE is nonzero. */ |
| 964 | |
| 965 | /* Let's optimize away calls to strlen("operator"). */ |
| 966 | |
| 967 | #define LENGTH_OF_OPERATOR 8 |
| 968 | |
| 969 | static unsigned int |
| 970 | cp_find_first_component_aux (const char *name, int permissive) |
| 971 | { |
| 972 | unsigned int index = 0; |
| 973 | /* Operator names can show up in unexpected places. Since these can |
| 974 | contain parentheses or angle brackets, they can screw up the |
| 975 | recursion. But not every string 'operator' is part of an |
| 976 | operater name: e.g. you could have a variable 'cooperator'. So |
| 977 | this variable tells us whether or not we should treat the string |
| 978 | 'operator' as starting an operator. */ |
| 979 | int operator_possible = 1; |
| 980 | |
| 981 | for (;; ++index) |
| 982 | { |
| 983 | switch (name[index]) |
| 984 | { |
| 985 | case '<': |
| 986 | /* Template; eat it up. The calls to cp_first_component |
| 987 | should only return (I hope!) when they reach the '>' |
| 988 | terminating the component or a '::' between two |
| 989 | components. (Hence the '+ 2'.) */ |
| 990 | index += 1; |
| 991 | for (index += cp_find_first_component_aux (name + index, 1); |
| 992 | name[index] != '>'; |
| 993 | index += cp_find_first_component_aux (name + index, 1)) |
| 994 | { |
| 995 | if (name[index] != ':') |
| 996 | { |
| 997 | demangled_name_complaint (name); |
| 998 | return strlen (name); |
| 999 | } |
| 1000 | index += 2; |
| 1001 | } |
| 1002 | operator_possible = 1; |
| 1003 | break; |
| 1004 | case '(': |
| 1005 | /* Similar comment as to '<'. */ |
| 1006 | index += 1; |
| 1007 | for (index += cp_find_first_component_aux (name + index, 1); |
| 1008 | name[index] != ')'; |
| 1009 | index += cp_find_first_component_aux (name + index, 1)) |
| 1010 | { |
| 1011 | if (name[index] != ':') |
| 1012 | { |
| 1013 | demangled_name_complaint (name); |
| 1014 | return strlen (name); |
| 1015 | } |
| 1016 | index += 2; |
| 1017 | } |
| 1018 | operator_possible = 1; |
| 1019 | break; |
| 1020 | case '>': |
| 1021 | case ')': |
| 1022 | if (permissive) |
| 1023 | return index; |
| 1024 | else |
| 1025 | { |
| 1026 | demangled_name_complaint (name); |
| 1027 | return strlen (name); |
| 1028 | } |
| 1029 | case '\0': |
| 1030 | return index; |
| 1031 | case ':': |
| 1032 | /* ':' marks a component iff the next character is also a ':'. |
| 1033 | Otherwise it is probably malformed input. */ |
| 1034 | if (name[index + 1] == ':') |
| 1035 | return index; |
| 1036 | break; |
| 1037 | case 'o': |
| 1038 | /* Operator names can screw up the recursion. */ |
| 1039 | if (operator_possible |
| 1040 | && strncmp (name + index, "operator", |
| 1041 | LENGTH_OF_OPERATOR) == 0) |
| 1042 | { |
| 1043 | index += LENGTH_OF_OPERATOR; |
| 1044 | while (ISSPACE(name[index])) |
| 1045 | ++index; |
| 1046 | switch (name[index]) |
| 1047 | { |
| 1048 | /* Skip over one less than the appropriate number of |
| 1049 | characters: the for loop will skip over the last |
| 1050 | one. */ |
| 1051 | case '<': |
| 1052 | if (name[index + 1] == '<') |
| 1053 | index += 1; |
| 1054 | else |
| 1055 | index += 0; |
| 1056 | break; |
| 1057 | case '>': |
| 1058 | case '-': |
| 1059 | if (name[index + 1] == '>') |
| 1060 | index += 1; |
| 1061 | else |
| 1062 | index += 0; |
| 1063 | break; |
| 1064 | case '(': |
| 1065 | index += 1; |
| 1066 | break; |
| 1067 | default: |
| 1068 | index += 0; |
| 1069 | break; |
| 1070 | } |
| 1071 | } |
| 1072 | operator_possible = 0; |
| 1073 | break; |
| 1074 | case ' ': |
| 1075 | case ',': |
| 1076 | case '.': |
| 1077 | case '&': |
| 1078 | case '*': |
| 1079 | /* NOTE: carlton/2003-04-18: I'm not sure what the precise |
| 1080 | set of relevant characters are here: it's necessary to |
| 1081 | include any character that can show up before 'operator' |
| 1082 | in a demangled name, and it's safe to include any |
| 1083 | character that can't be part of an identifier's name. */ |
| 1084 | operator_possible = 1; |
| 1085 | break; |
| 1086 | default: |
| 1087 | operator_possible = 0; |
| 1088 | break; |
| 1089 | } |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | /* Complain about a demangled name that we don't know how to parse. |
| 1094 | NAME is the demangled name in question. */ |
| 1095 | |
| 1096 | static void |
| 1097 | demangled_name_complaint (const char *name) |
| 1098 | { |
| 1099 | complaint (&symfile_complaints, |
| 1100 | "unexpected demangled name '%s'", name); |
| 1101 | } |
| 1102 | |
| 1103 | /* If NAME is the fully-qualified name of a C++ |
| 1104 | function/variable/method/etc., this returns the length of its |
| 1105 | entire prefix: all of the namespaces and classes that make up its |
| 1106 | name. Given 'A::foo', it returns 1, given 'A::B::foo', it returns |
| 1107 | 4, given 'foo', it returns 0. */ |
| 1108 | |
| 1109 | unsigned int |
| 1110 | cp_entire_prefix_len (const char *name) |
| 1111 | { |
| 1112 | unsigned int current_len = cp_find_first_component (name); |
| 1113 | unsigned int previous_len = 0; |
| 1114 | |
| 1115 | while (name[current_len] != '\0') |
| 1116 | { |
| 1117 | gdb_assert (name[current_len] == ':'); |
| 1118 | previous_len = current_len; |
| 1119 | /* Skip the '::'. */ |
| 1120 | current_len += 2; |
| 1121 | current_len += cp_find_first_component (name + current_len); |
| 1122 | } |
| 1123 | |
| 1124 | return previous_len; |
| 1125 | } |
| 1126 | |
| 1127 | /* Overload resolution functions. */ |
| 1128 | |
| 1129 | /* Test to see if SYM is a symbol that we haven't seen corresponding |
| 1130 | to a function named OLOAD_NAME. If so, add it to the current |
| 1131 | completion list. */ |
| 1132 | |
| 1133 | static void |
| 1134 | overload_list_add_symbol (struct symbol *sym, |
| 1135 | const char *oload_name) |
| 1136 | { |
| 1137 | int newsize; |
| 1138 | int i; |
| 1139 | char *sym_name; |
| 1140 | |
| 1141 | /* If there is no type information, we can't do anything, so |
| 1142 | skip. */ |
| 1143 | if (SYMBOL_TYPE (sym) == NULL) |
| 1144 | return; |
| 1145 | |
| 1146 | /* skip any symbols that we've already considered. */ |
| 1147 | for (i = 0; i < sym_return_val_index; ++i) |
| 1148 | if (strcmp (SYMBOL_LINKAGE_NAME (sym), |
| 1149 | SYMBOL_LINKAGE_NAME (sym_return_val[i])) == 0) |
| 1150 | return; |
| 1151 | |
| 1152 | /* Get the demangled name without parameters */ |
| 1153 | sym_name = cp_remove_params (SYMBOL_NATURAL_NAME (sym)); |
| 1154 | if (!sym_name) |
| 1155 | return; |
| 1156 | |
| 1157 | /* skip symbols that cannot match */ |
| 1158 | if (strcmp (sym_name, oload_name) != 0) |
| 1159 | { |
| 1160 | xfree (sym_name); |
| 1161 | return; |
| 1162 | } |
| 1163 | |
| 1164 | xfree (sym_name); |
| 1165 | |
| 1166 | /* We have a match for an overload instance, so add SYM to the |
| 1167 | current list of overload instances */ |
| 1168 | if (sym_return_val_index + 3 > sym_return_val_size) |
| 1169 | { |
| 1170 | newsize = (sym_return_val_size *= 2) * sizeof (struct symbol *); |
| 1171 | sym_return_val = (struct symbol **) |
| 1172 | xrealloc ((char *) sym_return_val, newsize); |
| 1173 | } |
| 1174 | sym_return_val[sym_return_val_index++] = sym; |
| 1175 | sym_return_val[sym_return_val_index] = NULL; |
| 1176 | } |
| 1177 | |
| 1178 | /* Return a null-terminated list of pointers to function symbols that |
| 1179 | are named FUNC_NAME and are visible within NAMESPACE. */ |
| 1180 | |
| 1181 | struct symbol ** |
| 1182 | make_symbol_overload_list (const char *func_name, |
| 1183 | const char *the_namespace) |
| 1184 | { |
| 1185 | struct cleanup *old_cleanups; |
| 1186 | const char *name; |
| 1187 | |
| 1188 | sym_return_val_size = 100; |
| 1189 | sym_return_val_index = 0; |
| 1190 | sym_return_val = XNEWVEC (struct symbol *, sym_return_val_size + 1); |
| 1191 | sym_return_val[0] = NULL; |
| 1192 | |
| 1193 | old_cleanups = make_cleanup (xfree, sym_return_val); |
| 1194 | |
| 1195 | make_symbol_overload_list_using (func_name, the_namespace); |
| 1196 | |
| 1197 | if (the_namespace[0] == '\0') |
| 1198 | name = func_name; |
| 1199 | else |
| 1200 | { |
| 1201 | char *concatenated_name |
| 1202 | = (char *) alloca (strlen (the_namespace) + 2 + strlen (func_name) + 1); |
| 1203 | strcpy (concatenated_name, the_namespace); |
| 1204 | strcat (concatenated_name, "::"); |
| 1205 | strcat (concatenated_name, func_name); |
| 1206 | name = concatenated_name; |
| 1207 | } |
| 1208 | |
| 1209 | make_symbol_overload_list_qualified (name); |
| 1210 | |
| 1211 | discard_cleanups (old_cleanups); |
| 1212 | |
| 1213 | return sym_return_val; |
| 1214 | } |
| 1215 | |
| 1216 | /* Add all symbols with a name matching NAME in BLOCK to the overload |
| 1217 | list. */ |
| 1218 | |
| 1219 | static void |
| 1220 | make_symbol_overload_list_block (const char *name, |
| 1221 | const struct block *block) |
| 1222 | { |
| 1223 | struct block_iterator iter; |
| 1224 | struct symbol *sym; |
| 1225 | |
| 1226 | ALL_BLOCK_SYMBOLS_WITH_NAME (block, name, iter, sym) |
| 1227 | overload_list_add_symbol (sym, name); |
| 1228 | } |
| 1229 | |
| 1230 | /* Adds the function FUNC_NAME from NAMESPACE to the overload set. */ |
| 1231 | |
| 1232 | static void |
| 1233 | make_symbol_overload_list_namespace (const char *func_name, |
| 1234 | const char *the_namespace) |
| 1235 | { |
| 1236 | const char *name; |
| 1237 | const struct block *block = NULL; |
| 1238 | |
| 1239 | if (the_namespace[0] == '\0') |
| 1240 | name = func_name; |
| 1241 | else |
| 1242 | { |
| 1243 | char *concatenated_name |
| 1244 | = (char *) alloca (strlen (the_namespace) + 2 + strlen (func_name) + 1); |
| 1245 | |
| 1246 | strcpy (concatenated_name, the_namespace); |
| 1247 | strcat (concatenated_name, "::"); |
| 1248 | strcat (concatenated_name, func_name); |
| 1249 | name = concatenated_name; |
| 1250 | } |
| 1251 | |
| 1252 | /* Look in the static block. */ |
| 1253 | block = block_static_block (get_selected_block (0)); |
| 1254 | if (block) |
| 1255 | make_symbol_overload_list_block (name, block); |
| 1256 | |
| 1257 | /* Look in the global block. */ |
| 1258 | block = block_global_block (block); |
| 1259 | if (block) |
| 1260 | make_symbol_overload_list_block (name, block); |
| 1261 | |
| 1262 | } |
| 1263 | |
| 1264 | /* Search the namespace of the given type and namespace of and public |
| 1265 | base types. */ |
| 1266 | |
| 1267 | static void |
| 1268 | make_symbol_overload_list_adl_namespace (struct type *type, |
| 1269 | const char *func_name) |
| 1270 | { |
| 1271 | char *the_namespace; |
| 1272 | const char *type_name; |
| 1273 | int i, prefix_len; |
| 1274 | |
| 1275 | while (TYPE_CODE (type) == TYPE_CODE_PTR |
| 1276 | || TYPE_CODE (type) == TYPE_CODE_REF |
| 1277 | || TYPE_CODE (type) == TYPE_CODE_ARRAY |
| 1278 | || TYPE_CODE (type) == TYPE_CODE_TYPEDEF) |
| 1279 | { |
| 1280 | if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) |
| 1281 | type = check_typedef(type); |
| 1282 | else |
| 1283 | type = TYPE_TARGET_TYPE (type); |
| 1284 | } |
| 1285 | |
| 1286 | type_name = TYPE_NAME (type); |
| 1287 | |
| 1288 | if (type_name == NULL) |
| 1289 | return; |
| 1290 | |
| 1291 | prefix_len = cp_entire_prefix_len (type_name); |
| 1292 | |
| 1293 | if (prefix_len != 0) |
| 1294 | { |
| 1295 | the_namespace = (char *) alloca (prefix_len + 1); |
| 1296 | strncpy (the_namespace, type_name, prefix_len); |
| 1297 | the_namespace[prefix_len] = '\0'; |
| 1298 | |
| 1299 | make_symbol_overload_list_namespace (func_name, the_namespace); |
| 1300 | } |
| 1301 | |
| 1302 | /* Check public base type */ |
| 1303 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 1304 | for (i = 0; i < TYPE_N_BASECLASSES (type); i++) |
| 1305 | { |
| 1306 | if (BASETYPE_VIA_PUBLIC (type, i)) |
| 1307 | make_symbol_overload_list_adl_namespace (TYPE_BASECLASS (type, |
| 1308 | i), |
| 1309 | func_name); |
| 1310 | } |
| 1311 | } |
| 1312 | |
| 1313 | /* Adds the overload list overload candidates for FUNC_NAME found |
| 1314 | through argument dependent lookup. */ |
| 1315 | |
| 1316 | struct symbol ** |
| 1317 | make_symbol_overload_list_adl (struct type **arg_types, int nargs, |
| 1318 | const char *func_name) |
| 1319 | { |
| 1320 | int i; |
| 1321 | |
| 1322 | gdb_assert (sym_return_val_size != -1); |
| 1323 | |
| 1324 | for (i = 1; i <= nargs; i++) |
| 1325 | make_symbol_overload_list_adl_namespace (arg_types[i - 1], |
| 1326 | func_name); |
| 1327 | |
| 1328 | return sym_return_val; |
| 1329 | } |
| 1330 | |
| 1331 | /* Used for cleanups to reset the "searched" flag in case of an |
| 1332 | error. */ |
| 1333 | |
| 1334 | static void |
| 1335 | reset_directive_searched (void *data) |
| 1336 | { |
| 1337 | struct using_direct *direct = (struct using_direct *) data; |
| 1338 | direct->searched = 0; |
| 1339 | } |
| 1340 | |
| 1341 | /* This applies the using directives to add namespaces to search in, |
| 1342 | and then searches for overloads in all of those namespaces. It |
| 1343 | adds the symbols found to sym_return_val. Arguments are as in |
| 1344 | make_symbol_overload_list. */ |
| 1345 | |
| 1346 | static void |
| 1347 | make_symbol_overload_list_using (const char *func_name, |
| 1348 | const char *the_namespace) |
| 1349 | { |
| 1350 | struct using_direct *current; |
| 1351 | const struct block *block; |
| 1352 | |
| 1353 | /* First, go through the using directives. If any of them apply, |
| 1354 | look in the appropriate namespaces for new functions to match |
| 1355 | on. */ |
| 1356 | |
| 1357 | for (block = get_selected_block (0); |
| 1358 | block != NULL; |
| 1359 | block = BLOCK_SUPERBLOCK (block)) |
| 1360 | for (current = block_using (block); |
| 1361 | current != NULL; |
| 1362 | current = current->next) |
| 1363 | { |
| 1364 | /* Prevent recursive calls. */ |
| 1365 | if (current->searched) |
| 1366 | continue; |
| 1367 | |
| 1368 | /* If this is a namespace alias or imported declaration ignore |
| 1369 | it. */ |
| 1370 | if (current->alias != NULL || current->declaration != NULL) |
| 1371 | continue; |
| 1372 | |
| 1373 | if (strcmp (the_namespace, current->import_dest) == 0) |
| 1374 | { |
| 1375 | /* Mark this import as searched so that the recursive call |
| 1376 | does not search it again. */ |
| 1377 | struct cleanup *old_chain; |
| 1378 | current->searched = 1; |
| 1379 | old_chain = make_cleanup (reset_directive_searched, |
| 1380 | current); |
| 1381 | |
| 1382 | make_symbol_overload_list_using (func_name, |
| 1383 | current->import_src); |
| 1384 | |
| 1385 | current->searched = 0; |
| 1386 | discard_cleanups (old_chain); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | /* Now, add names for this namespace. */ |
| 1391 | make_symbol_overload_list_namespace (func_name, the_namespace); |
| 1392 | } |
| 1393 | |
| 1394 | /* This does the bulk of the work of finding overloaded symbols. |
| 1395 | FUNC_NAME is the name of the overloaded function we're looking for |
| 1396 | (possibly including namespace info). */ |
| 1397 | |
| 1398 | static void |
| 1399 | make_symbol_overload_list_qualified (const char *func_name) |
| 1400 | { |
| 1401 | struct compunit_symtab *cust; |
| 1402 | struct objfile *objfile; |
| 1403 | const struct block *b, *surrounding_static_block = 0; |
| 1404 | |
| 1405 | /* Look through the partial symtabs for all symbols which begin by |
| 1406 | matching FUNC_NAME. Make sure we read that symbol table in. */ |
| 1407 | |
| 1408 | ALL_OBJFILES (objfile) |
| 1409 | { |
| 1410 | if (objfile->sf) |
| 1411 | objfile->sf->qf->expand_symtabs_for_function (objfile, func_name); |
| 1412 | } |
| 1413 | |
| 1414 | /* Search upwards from currently selected frame (so that we can |
| 1415 | complete on local vars. */ |
| 1416 | |
| 1417 | for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b)) |
| 1418 | make_symbol_overload_list_block (func_name, b); |
| 1419 | |
| 1420 | surrounding_static_block = block_static_block (get_selected_block (0)); |
| 1421 | |
| 1422 | /* Go through the symtabs and check the externs and statics for |
| 1423 | symbols which match. */ |
| 1424 | |
| 1425 | ALL_COMPUNITS (objfile, cust) |
| 1426 | { |
| 1427 | QUIT; |
| 1428 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), GLOBAL_BLOCK); |
| 1429 | make_symbol_overload_list_block (func_name, b); |
| 1430 | } |
| 1431 | |
| 1432 | ALL_COMPUNITS (objfile, cust) |
| 1433 | { |
| 1434 | QUIT; |
| 1435 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), STATIC_BLOCK); |
| 1436 | /* Don't do this block twice. */ |
| 1437 | if (b == surrounding_static_block) |
| 1438 | continue; |
| 1439 | make_symbol_overload_list_block (func_name, b); |
| 1440 | } |
| 1441 | } |
| 1442 | |
| 1443 | /* Lookup the rtti type for a class name. */ |
| 1444 | |
| 1445 | struct type * |
| 1446 | cp_lookup_rtti_type (const char *name, struct block *block) |
| 1447 | { |
| 1448 | struct symbol * rtti_sym; |
| 1449 | struct type * rtti_type; |
| 1450 | |
| 1451 | /* Use VAR_DOMAIN here as NAME may be a typedef. PR 18141, 18417. |
| 1452 | Classes "live" in both STRUCT_DOMAIN and VAR_DOMAIN. */ |
| 1453 | rtti_sym = lookup_symbol (name, block, VAR_DOMAIN, NULL).symbol; |
| 1454 | |
| 1455 | if (rtti_sym == NULL) |
| 1456 | { |
| 1457 | warning (_("RTTI symbol not found for class '%s'"), name); |
| 1458 | return NULL; |
| 1459 | } |
| 1460 | |
| 1461 | if (SYMBOL_CLASS (rtti_sym) != LOC_TYPEDEF) |
| 1462 | { |
| 1463 | warning (_("RTTI symbol for class '%s' is not a type"), name); |
| 1464 | return NULL; |
| 1465 | } |
| 1466 | |
| 1467 | rtti_type = check_typedef (SYMBOL_TYPE (rtti_sym)); |
| 1468 | |
| 1469 | switch (TYPE_CODE (rtti_type)) |
| 1470 | { |
| 1471 | case TYPE_CODE_STRUCT: |
| 1472 | break; |
| 1473 | case TYPE_CODE_NAMESPACE: |
| 1474 | /* chastain/2003-11-26: the symbol tables often contain fake |
| 1475 | symbols for namespaces with the same name as the struct. |
| 1476 | This warning is an indication of a bug in the lookup order |
| 1477 | or a bug in the way that the symbol tables are populated. */ |
| 1478 | warning (_("RTTI symbol for class '%s' is a namespace"), name); |
| 1479 | return NULL; |
| 1480 | default: |
| 1481 | warning (_("RTTI symbol for class '%s' has bad type"), name); |
| 1482 | return NULL; |
| 1483 | } |
| 1484 | |
| 1485 | return rtti_type; |
| 1486 | } |
| 1487 | |
| 1488 | #ifdef HAVE_WORKING_FORK |
| 1489 | |
| 1490 | /* If nonzero, attempt to catch crashes in the demangler and print |
| 1491 | useful debugging information. */ |
| 1492 | |
| 1493 | static int catch_demangler_crashes = 1; |
| 1494 | |
| 1495 | /* Stack context and environment for demangler crash recovery. */ |
| 1496 | |
| 1497 | static SIGJMP_BUF gdb_demangle_jmp_buf; |
| 1498 | |
| 1499 | /* If nonzero, attempt to dump core from the signal handler. */ |
| 1500 | |
| 1501 | static int gdb_demangle_attempt_core_dump = 1; |
| 1502 | |
| 1503 | /* Signal handler for gdb_demangle. */ |
| 1504 | |
| 1505 | static void |
| 1506 | gdb_demangle_signal_handler (int signo) |
| 1507 | { |
| 1508 | if (gdb_demangle_attempt_core_dump) |
| 1509 | { |
| 1510 | if (fork () == 0) |
| 1511 | dump_core (); |
| 1512 | |
| 1513 | gdb_demangle_attempt_core_dump = 0; |
| 1514 | } |
| 1515 | |
| 1516 | SIGLONGJMP (gdb_demangle_jmp_buf, signo); |
| 1517 | } |
| 1518 | |
| 1519 | #endif |
| 1520 | |
| 1521 | /* A wrapper for bfd_demangle. */ |
| 1522 | |
| 1523 | char * |
| 1524 | gdb_demangle (const char *name, int options) |
| 1525 | { |
| 1526 | char *result = NULL; |
| 1527 | int crash_signal = 0; |
| 1528 | |
| 1529 | #ifdef HAVE_WORKING_FORK |
| 1530 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 1531 | struct sigaction sa, old_sa; |
| 1532 | #else |
| 1533 | sighandler_t ofunc; |
| 1534 | #endif |
| 1535 | static int core_dump_allowed = -1; |
| 1536 | |
| 1537 | if (core_dump_allowed == -1) |
| 1538 | { |
| 1539 | core_dump_allowed = can_dump_core (LIMIT_CUR); |
| 1540 | |
| 1541 | if (!core_dump_allowed) |
| 1542 | gdb_demangle_attempt_core_dump = 0; |
| 1543 | } |
| 1544 | |
| 1545 | if (catch_demangler_crashes) |
| 1546 | { |
| 1547 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 1548 | sa.sa_handler = gdb_demangle_signal_handler; |
| 1549 | sigemptyset (&sa.sa_mask); |
| 1550 | #ifdef HAVE_SIGALTSTACK |
| 1551 | sa.sa_flags = SA_ONSTACK; |
| 1552 | #else |
| 1553 | sa.sa_flags = 0; |
| 1554 | #endif |
| 1555 | sigaction (SIGSEGV, &sa, &old_sa); |
| 1556 | #else |
| 1557 | ofunc = signal (SIGSEGV, gdb_demangle_signal_handler); |
| 1558 | #endif |
| 1559 | |
| 1560 | crash_signal = SIGSETJMP (gdb_demangle_jmp_buf); |
| 1561 | } |
| 1562 | #endif |
| 1563 | |
| 1564 | if (crash_signal == 0) |
| 1565 | result = bfd_demangle (NULL, name, options); |
| 1566 | |
| 1567 | #ifdef HAVE_WORKING_FORK |
| 1568 | if (catch_demangler_crashes) |
| 1569 | { |
| 1570 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 1571 | sigaction (SIGSEGV, &old_sa, NULL); |
| 1572 | #else |
| 1573 | signal (SIGSEGV, ofunc); |
| 1574 | #endif |
| 1575 | |
| 1576 | if (crash_signal != 0) |
| 1577 | { |
| 1578 | static int error_reported = 0; |
| 1579 | |
| 1580 | if (!error_reported) |
| 1581 | { |
| 1582 | char *short_msg, *long_msg; |
| 1583 | struct cleanup *back_to; |
| 1584 | |
| 1585 | short_msg = xstrprintf (_("unable to demangle '%s' " |
| 1586 | "(demangler failed with signal %d)"), |
| 1587 | name, crash_signal); |
| 1588 | back_to = make_cleanup (xfree, short_msg); |
| 1589 | |
| 1590 | long_msg = xstrprintf ("%s:%d: %s: %s", __FILE__, __LINE__, |
| 1591 | "demangler-warning", short_msg); |
| 1592 | make_cleanup (xfree, long_msg); |
| 1593 | |
| 1594 | make_cleanup_restore_target_terminal (); |
| 1595 | target_terminal_ours_for_output (); |
| 1596 | |
| 1597 | begin_line (); |
| 1598 | if (core_dump_allowed) |
| 1599 | fprintf_unfiltered (gdb_stderr, |
| 1600 | _("%s\nAttempting to dump core.\n"), |
| 1601 | long_msg); |
| 1602 | else |
| 1603 | warn_cant_dump_core (long_msg); |
| 1604 | |
| 1605 | demangler_warning (__FILE__, __LINE__, "%s", short_msg); |
| 1606 | |
| 1607 | do_cleanups (back_to); |
| 1608 | |
| 1609 | error_reported = 1; |
| 1610 | } |
| 1611 | |
| 1612 | result = NULL; |
| 1613 | } |
| 1614 | } |
| 1615 | #endif |
| 1616 | |
| 1617 | return result; |
| 1618 | } |
| 1619 | |
| 1620 | /* See cp-support.h. */ |
| 1621 | |
| 1622 | int |
| 1623 | gdb_sniff_from_mangled_name (const char *mangled, char **demangled) |
| 1624 | { |
| 1625 | *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); |
| 1626 | return *demangled != NULL; |
| 1627 | } |
| 1628 | |
| 1629 | /* Don't allow just "maintenance cplus". */ |
| 1630 | |
| 1631 | static void |
| 1632 | maint_cplus_command (char *arg, int from_tty) |
| 1633 | { |
| 1634 | printf_unfiltered (_("\"maintenance cplus\" must be followed " |
| 1635 | "by the name of a command.\n")); |
| 1636 | help_list (maint_cplus_cmd_list, |
| 1637 | "maintenance cplus ", |
| 1638 | all_commands, gdb_stdout); |
| 1639 | } |
| 1640 | |
| 1641 | /* This is a front end for cp_find_first_component, for unit testing. |
| 1642 | Be careful when using it: see the NOTE above |
| 1643 | cp_find_first_component. */ |
| 1644 | |
| 1645 | static void |
| 1646 | first_component_command (char *arg, int from_tty) |
| 1647 | { |
| 1648 | int len; |
| 1649 | char *prefix; |
| 1650 | |
| 1651 | if (!arg) |
| 1652 | return; |
| 1653 | |
| 1654 | len = cp_find_first_component (arg); |
| 1655 | prefix = (char *) alloca (len + 1); |
| 1656 | |
| 1657 | memcpy (prefix, arg, len); |
| 1658 | prefix[len] = '\0'; |
| 1659 | |
| 1660 | printf_unfiltered ("%s\n", prefix); |
| 1661 | } |
| 1662 | |
| 1663 | extern initialize_file_ftype _initialize_cp_support; /* -Wmissing-prototypes */ |
| 1664 | |
| 1665 | |
| 1666 | /* Implement "info vtbl". */ |
| 1667 | |
| 1668 | static void |
| 1669 | info_vtbl_command (char *arg, int from_tty) |
| 1670 | { |
| 1671 | struct value *value; |
| 1672 | |
| 1673 | value = parse_and_eval (arg); |
| 1674 | cplus_print_vtable (value); |
| 1675 | } |
| 1676 | |
| 1677 | void |
| 1678 | _initialize_cp_support (void) |
| 1679 | { |
| 1680 | add_prefix_cmd ("cplus", class_maintenance, |
| 1681 | maint_cplus_command, |
| 1682 | _("C++ maintenance commands."), |
| 1683 | &maint_cplus_cmd_list, |
| 1684 | "maintenance cplus ", |
| 1685 | 0, &maintenancelist); |
| 1686 | add_alias_cmd ("cp", "cplus", |
| 1687 | class_maintenance, 1, |
| 1688 | &maintenancelist); |
| 1689 | |
| 1690 | add_cmd ("first_component", |
| 1691 | class_maintenance, |
| 1692 | first_component_command, |
| 1693 | _("Print the first class/namespace component of NAME."), |
| 1694 | &maint_cplus_cmd_list); |
| 1695 | |
| 1696 | add_info ("vtbl", info_vtbl_command, |
| 1697 | _("Show the virtual function table for a C++ object.\n\ |
| 1698 | Usage: info vtbl EXPRESSION\n\ |
| 1699 | Evaluate EXPRESSION and display the virtual function table for the\n\ |
| 1700 | resulting object.")); |
| 1701 | |
| 1702 | #ifdef HAVE_WORKING_FORK |
| 1703 | add_setshow_boolean_cmd ("catch-demangler-crashes", class_maintenance, |
| 1704 | &catch_demangler_crashes, _("\ |
| 1705 | Set whether to attempt to catch demangler crashes."), _("\ |
| 1706 | Show whether to attempt to catch demangler crashes."), _("\ |
| 1707 | If enabled GDB will attempt to catch demangler crashes and\n\ |
| 1708 | display the offending symbol."), |
| 1709 | NULL, |
| 1710 | NULL, |
| 1711 | &maintenance_set_cmdlist, |
| 1712 | &maintenance_show_cmdlist); |
| 1713 | #endif |
| 1714 | } |