| 1 | /* Objective-C language support routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2002-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Apple Computer, Inc. |
| 6 | Written by Michael Snyder. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "symtab.h" |
| 25 | #include "gdbtypes.h" |
| 26 | #include "expression.h" |
| 27 | #include "parser-defs.h" |
| 28 | #include "language.h" |
| 29 | #include "varobj.h" |
| 30 | #include "c-lang.h" |
| 31 | #include "objc-lang.h" |
| 32 | #include "complaints.h" |
| 33 | #include "value.h" |
| 34 | #include "symfile.h" |
| 35 | #include "objfiles.h" |
| 36 | #include "target.h" /* for target_has_execution */ |
| 37 | #include "gdbcore.h" |
| 38 | #include "gdbcmd.h" |
| 39 | #include "frame.h" |
| 40 | #include "gdb_regex.h" |
| 41 | #include "regcache.h" |
| 42 | #include "block.h" |
| 43 | #include "infcall.h" |
| 44 | #include "valprint.h" |
| 45 | #include "cli/cli-utils.h" |
| 46 | |
| 47 | #include <ctype.h> |
| 48 | |
| 49 | struct objc_object { |
| 50 | CORE_ADDR isa; |
| 51 | }; |
| 52 | |
| 53 | struct objc_class { |
| 54 | CORE_ADDR isa; |
| 55 | CORE_ADDR super_class; |
| 56 | CORE_ADDR name; |
| 57 | long version; |
| 58 | long info; |
| 59 | long instance_size; |
| 60 | CORE_ADDR ivars; |
| 61 | CORE_ADDR methods; |
| 62 | CORE_ADDR cache; |
| 63 | CORE_ADDR protocols; |
| 64 | }; |
| 65 | |
| 66 | struct objc_super { |
| 67 | CORE_ADDR receiver; |
| 68 | CORE_ADDR theclass; |
| 69 | }; |
| 70 | |
| 71 | struct objc_method { |
| 72 | CORE_ADDR name; |
| 73 | CORE_ADDR types; |
| 74 | CORE_ADDR imp; |
| 75 | }; |
| 76 | |
| 77 | static const struct objfile_data *objc_objfile_data; |
| 78 | |
| 79 | /* Lookup a structure type named "struct NAME", visible in lexical |
| 80 | block BLOCK. If NOERR is nonzero, return zero if NAME is not |
| 81 | suitably defined. */ |
| 82 | |
| 83 | struct symbol * |
| 84 | lookup_struct_typedef (const char *name, const struct block *block, int noerr) |
| 85 | { |
| 86 | struct symbol *sym; |
| 87 | |
| 88 | sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0).symbol; |
| 89 | |
| 90 | if (sym == NULL) |
| 91 | { |
| 92 | if (noerr) |
| 93 | return 0; |
| 94 | else |
| 95 | error (_("No struct type named %s."), name); |
| 96 | } |
| 97 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT) |
| 98 | { |
| 99 | if (noerr) |
| 100 | return 0; |
| 101 | else |
| 102 | error (_("This context has class, union or enum %s, not a struct."), |
| 103 | name); |
| 104 | } |
| 105 | return sym; |
| 106 | } |
| 107 | |
| 108 | CORE_ADDR |
| 109 | lookup_objc_class (struct gdbarch *gdbarch, const char *classname) |
| 110 | { |
| 111 | struct type *char_type = builtin_type (gdbarch)->builtin_char; |
| 112 | struct value * function, *classval; |
| 113 | |
| 114 | if (! target_has_execution) |
| 115 | { |
| 116 | /* Can't call into inferior to lookup class. */ |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | if (lookup_minimal_symbol("objc_lookUpClass", 0, 0).minsym) |
| 121 | function = find_function_in_inferior("objc_lookUpClass", NULL); |
| 122 | else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0).minsym) |
| 123 | function = find_function_in_inferior("objc_lookup_class", NULL); |
| 124 | else |
| 125 | { |
| 126 | complaint (&symfile_complaints, |
| 127 | _("no way to lookup Objective-C classes")); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | classval = value_string (classname, strlen (classname) + 1, char_type); |
| 132 | classval = value_coerce_array (classval); |
| 133 | return (CORE_ADDR) value_as_long (call_function_by_hand (function, |
| 134 | NULL, |
| 135 | 1, &classval)); |
| 136 | } |
| 137 | |
| 138 | CORE_ADDR |
| 139 | lookup_child_selector (struct gdbarch *gdbarch, const char *selname) |
| 140 | { |
| 141 | struct type *char_type = builtin_type (gdbarch)->builtin_char; |
| 142 | struct value * function, *selstring; |
| 143 | |
| 144 | if (! target_has_execution) |
| 145 | { |
| 146 | /* Can't call into inferior to lookup selector. */ |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | if (lookup_minimal_symbol("sel_getUid", 0, 0).minsym) |
| 151 | function = find_function_in_inferior("sel_getUid", NULL); |
| 152 | else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0).minsym) |
| 153 | function = find_function_in_inferior("sel_get_any_uid", NULL); |
| 154 | else |
| 155 | { |
| 156 | complaint (&symfile_complaints, |
| 157 | _("no way to lookup Objective-C selectors")); |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | selstring = value_coerce_array (value_string (selname, |
| 162 | strlen (selname) + 1, |
| 163 | char_type)); |
| 164 | return value_as_long (call_function_by_hand (function, NULL, 1, &selstring)); |
| 165 | } |
| 166 | |
| 167 | struct value * |
| 168 | value_nsstring (struct gdbarch *gdbarch, char *ptr, int len) |
| 169 | { |
| 170 | struct type *char_type = builtin_type (gdbarch)->builtin_char; |
| 171 | struct value *stringValue[3]; |
| 172 | struct value *function, *nsstringValue; |
| 173 | struct symbol *sym; |
| 174 | struct type *type; |
| 175 | |
| 176 | if (!target_has_execution) |
| 177 | return 0; /* Can't call into inferior to create NSString. */ |
| 178 | |
| 179 | stringValue[2] = value_string(ptr, len, char_type); |
| 180 | stringValue[2] = value_coerce_array(stringValue[2]); |
| 181 | /* _NSNewStringFromCString replaces "istr" after Lantern2A. */ |
| 182 | if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0).minsym) |
| 183 | { |
| 184 | function = find_function_in_inferior("_NSNewStringFromCString", NULL); |
| 185 | nsstringValue = call_function_by_hand(function, |
| 186 | NULL, 1, &stringValue[2]); |
| 187 | } |
| 188 | else if (lookup_minimal_symbol("istr", 0, 0).minsym) |
| 189 | { |
| 190 | function = find_function_in_inferior("istr", NULL); |
| 191 | nsstringValue = call_function_by_hand(function, NULL, 1, &stringValue[2]); |
| 192 | } |
| 193 | else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0).minsym) |
| 194 | { |
| 195 | function |
| 196 | = find_function_in_inferior("+[NSString stringWithCString:]", NULL); |
| 197 | type = builtin_type (gdbarch)->builtin_long; |
| 198 | |
| 199 | stringValue[0] = value_from_longest |
| 200 | (type, lookup_objc_class (gdbarch, "NSString")); |
| 201 | stringValue[1] = value_from_longest |
| 202 | (type, lookup_child_selector (gdbarch, "stringWithCString:")); |
| 203 | nsstringValue = call_function_by_hand(function, NULL, 3, &stringValue[0]); |
| 204 | } |
| 205 | else |
| 206 | error (_("NSString: internal error -- no way to create new NSString")); |
| 207 | |
| 208 | sym = lookup_struct_typedef("NSString", 0, 1); |
| 209 | if (sym == NULL) |
| 210 | sym = lookup_struct_typedef("NXString", 0, 1); |
| 211 | if (sym == NULL) |
| 212 | type = builtin_type (gdbarch)->builtin_data_ptr; |
| 213 | else |
| 214 | type = lookup_pointer_type(SYMBOL_TYPE (sym)); |
| 215 | |
| 216 | deprecated_set_value_type (nsstringValue, type); |
| 217 | return nsstringValue; |
| 218 | } |
| 219 | |
| 220 | /* Objective-C name demangling. */ |
| 221 | |
| 222 | char * |
| 223 | objc_demangle (const char *mangled, int options) |
| 224 | { |
| 225 | char *demangled, *cp; |
| 226 | |
| 227 | if (mangled[0] == '_' && |
| 228 | (mangled[1] == 'i' || mangled[1] == 'c') && |
| 229 | mangled[2] == '_') |
| 230 | { |
| 231 | cp = demangled = (char *) xmalloc (strlen (mangled) + 2); |
| 232 | |
| 233 | if (mangled[1] == 'i') |
| 234 | *cp++ = '-'; /* for instance method */ |
| 235 | else |
| 236 | *cp++ = '+'; /* for class method */ |
| 237 | |
| 238 | *cp++ = '['; /* opening left brace */ |
| 239 | strcpy(cp, mangled+3); /* Tack on the rest of the mangled name. */ |
| 240 | |
| 241 | while (*cp && *cp == '_') |
| 242 | cp++; /* Skip any initial underbars in class |
| 243 | name. */ |
| 244 | |
| 245 | cp = strchr(cp, '_'); |
| 246 | if (!cp) /* Find first non-initial underbar. */ |
| 247 | { |
| 248 | xfree(demangled); /* not mangled name */ |
| 249 | return NULL; |
| 250 | } |
| 251 | if (cp[1] == '_') /* Easy case: no category name. */ |
| 252 | { |
| 253 | *cp++ = ' '; /* Replace two '_' with one ' '. */ |
| 254 | strcpy(cp, mangled + (cp - demangled) + 2); |
| 255 | } |
| 256 | else |
| 257 | { |
| 258 | *cp++ = '('; /* Less easy case: category name. */ |
| 259 | cp = strchr(cp, '_'); |
| 260 | if (!cp) |
| 261 | { |
| 262 | xfree(demangled); /* not mangled name */ |
| 263 | return NULL; |
| 264 | } |
| 265 | *cp++ = ')'; |
| 266 | *cp++ = ' '; /* Overwriting 1st char of method name... */ |
| 267 | strcpy(cp, mangled + (cp - demangled)); /* Get it back. */ |
| 268 | } |
| 269 | |
| 270 | while (*cp && *cp == '_') |
| 271 | cp++; /* Skip any initial underbars in |
| 272 | method name. */ |
| 273 | |
| 274 | for (; *cp; cp++) |
| 275 | if (*cp == '_') |
| 276 | *cp = ':'; /* Replace remaining '_' with ':'. */ |
| 277 | |
| 278 | *cp++ = ']'; /* closing right brace */ |
| 279 | *cp++ = 0; /* string terminator */ |
| 280 | return demangled; |
| 281 | } |
| 282 | else |
| 283 | return NULL; /* Not an objc mangled name. */ |
| 284 | } |
| 285 | |
| 286 | /* la_sniff_from_mangled_name for ObjC. */ |
| 287 | |
| 288 | static int |
| 289 | objc_sniff_from_mangled_name (const char *mangled, char **demangled) |
| 290 | { |
| 291 | *demangled = objc_demangle (mangled, 0); |
| 292 | return *demangled != NULL; |
| 293 | } |
| 294 | |
| 295 | /* Determine if we are currently in the Objective-C dispatch function. |
| 296 | If so, get the address of the method function that the dispatcher |
| 297 | would call and use that as the function to step into instead. Also |
| 298 | skip over the trampoline for the function (if any). This is better |
| 299 | for the user since they are only interested in stepping into the |
| 300 | method function anyway. */ |
| 301 | static CORE_ADDR |
| 302 | objc_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc) |
| 303 | { |
| 304 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 305 | CORE_ADDR real_stop_pc; |
| 306 | CORE_ADDR method_stop_pc; |
| 307 | |
| 308 | real_stop_pc = gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc); |
| 309 | |
| 310 | if (real_stop_pc != 0) |
| 311 | find_objc_msgcall (real_stop_pc, &method_stop_pc); |
| 312 | else |
| 313 | find_objc_msgcall (stop_pc, &method_stop_pc); |
| 314 | |
| 315 | if (method_stop_pc) |
| 316 | { |
| 317 | real_stop_pc = gdbarch_skip_trampoline_code |
| 318 | (gdbarch, frame, method_stop_pc); |
| 319 | if (real_stop_pc == 0) |
| 320 | real_stop_pc = method_stop_pc; |
| 321 | } |
| 322 | |
| 323 | return real_stop_pc; |
| 324 | } |
| 325 | |
| 326 | |
| 327 | /* Table mapping opcodes into strings for printing operators |
| 328 | and precedences of the operators. */ |
| 329 | |
| 330 | static const struct op_print objc_op_print_tab[] = |
| 331 | { |
| 332 | {",", BINOP_COMMA, PREC_COMMA, 0}, |
| 333 | {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
| 334 | {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, |
| 335 | {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
| 336 | {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, |
| 337 | {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, |
| 338 | {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, |
| 339 | {"==", BINOP_EQUAL, PREC_EQUAL, 0}, |
| 340 | {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, |
| 341 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, |
| 342 | {">=", BINOP_GEQ, PREC_ORDER, 0}, |
| 343 | {">", BINOP_GTR, PREC_ORDER, 0}, |
| 344 | {"<", BINOP_LESS, PREC_ORDER, 0}, |
| 345 | {">>", BINOP_RSH, PREC_SHIFT, 0}, |
| 346 | {"<<", BINOP_LSH, PREC_SHIFT, 0}, |
| 347 | {"+", BINOP_ADD, PREC_ADD, 0}, |
| 348 | {"-", BINOP_SUB, PREC_ADD, 0}, |
| 349 | {"*", BINOP_MUL, PREC_MUL, 0}, |
| 350 | {"/", BINOP_DIV, PREC_MUL, 0}, |
| 351 | {"%", BINOP_REM, PREC_MUL, 0}, |
| 352 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, |
| 353 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
| 354 | {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, |
| 355 | {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, |
| 356 | {"*", UNOP_IND, PREC_PREFIX, 0}, |
| 357 | {"&", UNOP_ADDR, PREC_PREFIX, 0}, |
| 358 | {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0}, |
| 359 | {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, |
| 360 | {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, |
| 361 | {NULL, OP_NULL, PREC_NULL, 0} |
| 362 | }; |
| 363 | |
| 364 | static const char *objc_extensions[] = |
| 365 | { |
| 366 | ".m", NULL |
| 367 | }; |
| 368 | |
| 369 | extern const struct language_defn objc_language_defn = { |
| 370 | "objective-c", /* Language name */ |
| 371 | "Objective-C", |
| 372 | language_objc, |
| 373 | range_check_off, |
| 374 | case_sensitive_on, |
| 375 | array_row_major, |
| 376 | macro_expansion_c, |
| 377 | objc_extensions, |
| 378 | &exp_descriptor_standard, |
| 379 | c_parse, |
| 380 | c_yyerror, |
| 381 | null_post_parser, |
| 382 | c_printchar, /* Print a character constant */ |
| 383 | c_printstr, /* Function to print string constant */ |
| 384 | c_emit_char, |
| 385 | c_print_type, /* Print a type using appropriate syntax */ |
| 386 | c_print_typedef, /* Print a typedef using appropriate syntax */ |
| 387 | c_val_print, /* Print a value using appropriate syntax */ |
| 388 | c_value_print, /* Print a top-level value */ |
| 389 | default_read_var_value, /* la_read_var_value */ |
| 390 | objc_skip_trampoline, /* Language specific skip_trampoline */ |
| 391 | "self", /* name_of_this */ |
| 392 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 393 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 394 | objc_demangle, /* Language specific symbol demangler */ |
| 395 | objc_sniff_from_mangled_name, |
| 396 | NULL, /* Language specific |
| 397 | class_name_from_physname */ |
| 398 | objc_op_print_tab, /* Expression operators for printing */ |
| 399 | 1, /* C-style arrays */ |
| 400 | 0, /* String lower bound */ |
| 401 | default_word_break_characters, |
| 402 | default_collect_symbol_completion_matches, |
| 403 | c_language_arch_info, |
| 404 | default_print_array_index, |
| 405 | default_pass_by_reference, |
| 406 | default_get_string, |
| 407 | c_watch_location_expression, |
| 408 | NULL, /* la_get_symbol_name_cmp */ |
| 409 | iterate_over_symbols, |
| 410 | &default_varobj_ops, |
| 411 | NULL, |
| 412 | NULL, |
| 413 | LANG_MAGIC |
| 414 | }; |
| 415 | |
| 416 | /* |
| 417 | * ObjC: |
| 418 | * Following functions help construct Objective-C message calls. |
| 419 | */ |
| 420 | |
| 421 | struct selname /* For parsing Objective-C. */ |
| 422 | { |
| 423 | struct selname *next; |
| 424 | char *msglist_sel; |
| 425 | int msglist_len; |
| 426 | }; |
| 427 | |
| 428 | static int msglist_len; |
| 429 | static struct selname *selname_chain; |
| 430 | static char *msglist_sel; |
| 431 | |
| 432 | void |
| 433 | start_msglist(void) |
| 434 | { |
| 435 | struct selname *newobj = XNEW (struct selname); |
| 436 | |
| 437 | newobj->next = selname_chain; |
| 438 | newobj->msglist_len = msglist_len; |
| 439 | newobj->msglist_sel = msglist_sel; |
| 440 | msglist_len = 0; |
| 441 | msglist_sel = (char *)xmalloc(1); |
| 442 | *msglist_sel = 0; |
| 443 | selname_chain = newobj; |
| 444 | } |
| 445 | |
| 446 | void |
| 447 | add_msglist(struct stoken *str, int addcolon) |
| 448 | { |
| 449 | char *s; |
| 450 | const char *p; |
| 451 | int len, plen; |
| 452 | |
| 453 | if (str == 0) /* Unnamed arg, or... */ |
| 454 | { |
| 455 | if (addcolon == 0) /* variable number of args. */ |
| 456 | { |
| 457 | msglist_len++; |
| 458 | return; |
| 459 | } |
| 460 | p = ""; |
| 461 | plen = 0; |
| 462 | } |
| 463 | else |
| 464 | { |
| 465 | p = str->ptr; |
| 466 | plen = str->length; |
| 467 | } |
| 468 | len = plen + strlen(msglist_sel) + 2; |
| 469 | s = (char *)xmalloc(len); |
| 470 | strcpy(s, msglist_sel); |
| 471 | strncat(s, p, plen); |
| 472 | xfree(msglist_sel); |
| 473 | msglist_sel = s; |
| 474 | if (addcolon) |
| 475 | { |
| 476 | s[len-2] = ':'; |
| 477 | s[len-1] = 0; |
| 478 | msglist_len++; |
| 479 | } |
| 480 | else |
| 481 | s[len-2] = '\0'; |
| 482 | } |
| 483 | |
| 484 | int |
| 485 | end_msglist (struct parser_state *ps) |
| 486 | { |
| 487 | int val = msglist_len; |
| 488 | struct selname *sel = selname_chain; |
| 489 | char *p = msglist_sel; |
| 490 | CORE_ADDR selid; |
| 491 | |
| 492 | selname_chain = sel->next; |
| 493 | msglist_len = sel->msglist_len; |
| 494 | msglist_sel = sel->msglist_sel; |
| 495 | selid = lookup_child_selector (parse_gdbarch (ps), p); |
| 496 | if (!selid) |
| 497 | error (_("Can't find selector \"%s\""), p); |
| 498 | write_exp_elt_longcst (ps, selid); |
| 499 | xfree(p); |
| 500 | write_exp_elt_longcst (ps, val); /* Number of args */ |
| 501 | xfree(sel); |
| 502 | |
| 503 | return val; |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Function: specialcmp (const char *a, const char *b) |
| 508 | * |
| 509 | * Special strcmp: treats ']' and ' ' as end-of-string. |
| 510 | * Used for qsorting lists of objc methods (either by class or selector). |
| 511 | */ |
| 512 | |
| 513 | static int |
| 514 | specialcmp (const char *a, const char *b) |
| 515 | { |
| 516 | while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']') |
| 517 | { |
| 518 | if (*a != *b) |
| 519 | return *a - *b; |
| 520 | a++, b++; |
| 521 | } |
| 522 | if (*a && *a != ' ' && *a != ']') |
| 523 | return 1; /* a is longer therefore greater. */ |
| 524 | if (*b && *b != ' ' && *b != ']') |
| 525 | return -1; /* a is shorter therefore lesser. */ |
| 526 | return 0; /* a and b are identical. */ |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Function: compare_selectors (const void *, const void *) |
| 531 | * |
| 532 | * Comparison function for use with qsort. Arguments are symbols or |
| 533 | * msymbols Compares selector part of objc method name alphabetically. |
| 534 | */ |
| 535 | |
| 536 | static int |
| 537 | compare_selectors (const void *a, const void *b) |
| 538 | { |
| 539 | const char *aname, *bname; |
| 540 | |
| 541 | aname = SYMBOL_PRINT_NAME (*(struct symbol **) a); |
| 542 | bname = SYMBOL_PRINT_NAME (*(struct symbol **) b); |
| 543 | if (aname == NULL || bname == NULL) |
| 544 | error (_("internal: compare_selectors(1)")); |
| 545 | |
| 546 | aname = strchr(aname, ' '); |
| 547 | bname = strchr(bname, ' '); |
| 548 | if (aname == NULL || bname == NULL) |
| 549 | error (_("internal: compare_selectors(2)")); |
| 550 | |
| 551 | return specialcmp (aname+1, bname+1); |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * Function: selectors_info (regexp, from_tty) |
| 556 | * |
| 557 | * Implements the "Info selectors" command. Takes an optional regexp |
| 558 | * arg. Lists all objective c selectors that match the regexp. Works |
| 559 | * by grepping thru all symbols for objective c methods. Output list |
| 560 | * is sorted and uniqued. |
| 561 | */ |
| 562 | |
| 563 | static void |
| 564 | info_selectors_command (char *regexp, int from_tty) |
| 565 | { |
| 566 | struct objfile *objfile; |
| 567 | struct minimal_symbol *msymbol; |
| 568 | const char *name; |
| 569 | char *val; |
| 570 | int matches = 0; |
| 571 | int maxlen = 0; |
| 572 | int ix; |
| 573 | char myregexp[2048]; |
| 574 | char asel[256]; |
| 575 | struct symbol **sym_arr; |
| 576 | int plusminus = 0; |
| 577 | |
| 578 | if (regexp == NULL) |
| 579 | strcpy(myregexp, ".*]"); /* Null input, match all objc methods. */ |
| 580 | else |
| 581 | { |
| 582 | if (*regexp == '+' || *regexp == '-') |
| 583 | { /* User wants only class methods or only instance methods. */ |
| 584 | plusminus = *regexp++; |
| 585 | while (*regexp == ' ' || *regexp == '\t') |
| 586 | regexp++; |
| 587 | } |
| 588 | if (*regexp == '\0') |
| 589 | strcpy(myregexp, ".*]"); |
| 590 | else |
| 591 | { |
| 592 | /* Allow a few extra bytes because of the strcat below. */ |
| 593 | if (sizeof (myregexp) < strlen (regexp) + 4) |
| 594 | error (_("Regexp is too long: %s"), regexp); |
| 595 | strcpy(myregexp, regexp); |
| 596 | if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */ |
| 597 | myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */ |
| 598 | else |
| 599 | strcat(myregexp, ".*]"); |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | if (regexp != NULL) |
| 604 | { |
| 605 | val = re_comp (myregexp); |
| 606 | if (val != 0) |
| 607 | error (_("Invalid regexp (%s): %s"), val, regexp); |
| 608 | } |
| 609 | |
| 610 | /* First time thru is JUST to get max length and count. */ |
| 611 | ALL_MSYMBOLS (objfile, msymbol) |
| 612 | { |
| 613 | QUIT; |
| 614 | name = MSYMBOL_NATURAL_NAME (msymbol); |
| 615 | if (name |
| 616 | && (name[0] == '-' || name[0] == '+') |
| 617 | && name[1] == '[') /* Got a method name. */ |
| 618 | { |
| 619 | /* Filter for class/instance methods. */ |
| 620 | if (plusminus && name[0] != plusminus) |
| 621 | continue; |
| 622 | /* Find selector part. */ |
| 623 | name = (char *) strchr (name+2, ' '); |
| 624 | if (name == NULL) |
| 625 | { |
| 626 | complaint (&symfile_complaints, |
| 627 | _("Bad method name '%s'"), |
| 628 | MSYMBOL_NATURAL_NAME (msymbol)); |
| 629 | continue; |
| 630 | } |
| 631 | if (regexp == NULL || re_exec(++name) != 0) |
| 632 | { |
| 633 | const char *mystart = name; |
| 634 | const char *myend = strchr (mystart, ']'); |
| 635 | |
| 636 | if (myend && (myend - mystart > maxlen)) |
| 637 | maxlen = myend - mystart; /* Get longest selector. */ |
| 638 | matches++; |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | if (matches) |
| 643 | { |
| 644 | printf_filtered (_("Selectors matching \"%s\":\n\n"), |
| 645 | regexp ? regexp : "*"); |
| 646 | |
| 647 | sym_arr = XALLOCAVEC (struct symbol *, matches); |
| 648 | matches = 0; |
| 649 | ALL_MSYMBOLS (objfile, msymbol) |
| 650 | { |
| 651 | QUIT; |
| 652 | name = MSYMBOL_NATURAL_NAME (msymbol); |
| 653 | if (name && |
| 654 | (name[0] == '-' || name[0] == '+') && |
| 655 | name[1] == '[') /* Got a method name. */ |
| 656 | { |
| 657 | /* Filter for class/instance methods. */ |
| 658 | if (plusminus && name[0] != plusminus) |
| 659 | continue; |
| 660 | /* Find selector part. */ |
| 661 | name = (char *) strchr(name+2, ' '); |
| 662 | if (regexp == NULL || re_exec(++name) != 0) |
| 663 | sym_arr[matches++] = (struct symbol *) msymbol; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | qsort (sym_arr, matches, sizeof (struct minimal_symbol *), |
| 668 | compare_selectors); |
| 669 | /* Prevent compare on first iteration. */ |
| 670 | asel[0] = 0; |
| 671 | for (ix = 0; ix < matches; ix++) /* Now do the output. */ |
| 672 | { |
| 673 | char *p = asel; |
| 674 | |
| 675 | QUIT; |
| 676 | name = SYMBOL_NATURAL_NAME (sym_arr[ix]); |
| 677 | name = strchr (name, ' ') + 1; |
| 678 | if (p[0] && specialcmp(name, p) == 0) |
| 679 | continue; /* Seen this one already (not unique). */ |
| 680 | |
| 681 | /* Copy selector part. */ |
| 682 | while (*name && *name != ']') |
| 683 | *p++ = *name++; |
| 684 | *p++ = '\0'; |
| 685 | /* Print in columns. */ |
| 686 | puts_filtered_tabular(asel, maxlen + 1, 0); |
| 687 | } |
| 688 | begin_line(); |
| 689 | } |
| 690 | else |
| 691 | printf_filtered (_("No selectors matching \"%s\"\n"), |
| 692 | regexp ? regexp : "*"); |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * Function: compare_classes (const void *, const void *) |
| 697 | * |
| 698 | * Comparison function for use with qsort. Arguments are symbols or |
| 699 | * msymbols Compares class part of objc method name alphabetically. |
| 700 | */ |
| 701 | |
| 702 | static int |
| 703 | compare_classes (const void *a, const void *b) |
| 704 | { |
| 705 | const char *aname, *bname; |
| 706 | |
| 707 | aname = SYMBOL_PRINT_NAME (*(struct symbol **) a); |
| 708 | bname = SYMBOL_PRINT_NAME (*(struct symbol **) b); |
| 709 | if (aname == NULL || bname == NULL) |
| 710 | error (_("internal: compare_classes(1)")); |
| 711 | |
| 712 | return specialcmp (aname+1, bname+1); |
| 713 | } |
| 714 | |
| 715 | /* |
| 716 | * Function: classes_info(regexp, from_tty) |
| 717 | * |
| 718 | * Implements the "info classes" command for objective c classes. |
| 719 | * Lists all objective c classes that match the optional regexp. |
| 720 | * Works by grepping thru the list of objective c methods. List will |
| 721 | * be sorted and uniqued (since one class may have many methods). |
| 722 | * BUGS: will not list a class that has no methods. |
| 723 | */ |
| 724 | |
| 725 | static void |
| 726 | info_classes_command (char *regexp, int from_tty) |
| 727 | { |
| 728 | struct objfile *objfile; |
| 729 | struct minimal_symbol *msymbol; |
| 730 | const char *name; |
| 731 | char *val; |
| 732 | int matches = 0; |
| 733 | int maxlen = 0; |
| 734 | int ix; |
| 735 | char myregexp[2048]; |
| 736 | char aclass[256]; |
| 737 | struct symbol **sym_arr; |
| 738 | |
| 739 | if (regexp == NULL) |
| 740 | strcpy(myregexp, ".* "); /* Null input: match all objc classes. */ |
| 741 | else |
| 742 | { |
| 743 | /* Allow a few extra bytes because of the strcat below. */ |
| 744 | if (sizeof (myregexp) < strlen (regexp) + 4) |
| 745 | error (_("Regexp is too long: %s"), regexp); |
| 746 | strcpy(myregexp, regexp); |
| 747 | if (myregexp[strlen(myregexp) - 1] == '$') |
| 748 | /* In the method name, the end of the class name is marked by ' '. */ |
| 749 | myregexp[strlen(myregexp) - 1] = ' '; |
| 750 | else |
| 751 | strcat(myregexp, ".* "); |
| 752 | } |
| 753 | |
| 754 | if (regexp != NULL) |
| 755 | { |
| 756 | val = re_comp (myregexp); |
| 757 | if (val != 0) |
| 758 | error (_("Invalid regexp (%s): %s"), val, regexp); |
| 759 | } |
| 760 | |
| 761 | /* First time thru is JUST to get max length and count. */ |
| 762 | ALL_MSYMBOLS (objfile, msymbol) |
| 763 | { |
| 764 | QUIT; |
| 765 | name = MSYMBOL_NATURAL_NAME (msymbol); |
| 766 | if (name && |
| 767 | (name[0] == '-' || name[0] == '+') && |
| 768 | name[1] == '[') /* Got a method name. */ |
| 769 | if (regexp == NULL || re_exec(name+2) != 0) |
| 770 | { |
| 771 | /* Compute length of classname part. */ |
| 772 | const char *mystart = name + 2; |
| 773 | const char *myend = strchr (mystart, ' '); |
| 774 | |
| 775 | if (myend && (myend - mystart > maxlen)) |
| 776 | maxlen = myend - mystart; |
| 777 | matches++; |
| 778 | } |
| 779 | } |
| 780 | if (matches) |
| 781 | { |
| 782 | printf_filtered (_("Classes matching \"%s\":\n\n"), |
| 783 | regexp ? regexp : "*"); |
| 784 | sym_arr = XALLOCAVEC (struct symbol *, matches); |
| 785 | matches = 0; |
| 786 | ALL_MSYMBOLS (objfile, msymbol) |
| 787 | { |
| 788 | QUIT; |
| 789 | name = MSYMBOL_NATURAL_NAME (msymbol); |
| 790 | if (name && |
| 791 | (name[0] == '-' || name[0] == '+') && |
| 792 | name[1] == '[') /* Got a method name. */ |
| 793 | if (regexp == NULL || re_exec(name+2) != 0) |
| 794 | sym_arr[matches++] = (struct symbol *) msymbol; |
| 795 | } |
| 796 | |
| 797 | qsort (sym_arr, matches, sizeof (struct minimal_symbol *), |
| 798 | compare_classes); |
| 799 | /* Prevent compare on first iteration. */ |
| 800 | aclass[0] = 0; |
| 801 | for (ix = 0; ix < matches; ix++) /* Now do the output. */ |
| 802 | { |
| 803 | char *p = aclass; |
| 804 | |
| 805 | QUIT; |
| 806 | name = SYMBOL_NATURAL_NAME (sym_arr[ix]); |
| 807 | name += 2; |
| 808 | if (p[0] && specialcmp(name, p) == 0) |
| 809 | continue; /* Seen this one already (not unique). */ |
| 810 | |
| 811 | /* Copy class part of method name. */ |
| 812 | while (*name && *name != ' ') |
| 813 | *p++ = *name++; |
| 814 | *p++ = '\0'; |
| 815 | /* Print in columns. */ |
| 816 | puts_filtered_tabular(aclass, maxlen + 1, 0); |
| 817 | } |
| 818 | begin_line(); |
| 819 | } |
| 820 | else |
| 821 | printf_filtered (_("No classes matching \"%s\"\n"), regexp ? regexp : "*"); |
| 822 | } |
| 823 | |
| 824 | static char * |
| 825 | parse_selector (char *method, char **selector) |
| 826 | { |
| 827 | char *s1 = NULL; |
| 828 | char *s2 = NULL; |
| 829 | int found_quote = 0; |
| 830 | |
| 831 | char *nselector = NULL; |
| 832 | |
| 833 | gdb_assert (selector != NULL); |
| 834 | |
| 835 | s1 = method; |
| 836 | |
| 837 | s1 = skip_spaces (s1); |
| 838 | if (*s1 == '\'') |
| 839 | { |
| 840 | found_quote = 1; |
| 841 | s1++; |
| 842 | } |
| 843 | s1 = skip_spaces (s1); |
| 844 | |
| 845 | nselector = s1; |
| 846 | s2 = s1; |
| 847 | |
| 848 | for (;;) |
| 849 | { |
| 850 | if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':')) |
| 851 | *s1++ = *s2; |
| 852 | else if (isspace (*s2)) |
| 853 | ; |
| 854 | else if ((*s2 == '\0') || (*s2 == '\'')) |
| 855 | break; |
| 856 | else |
| 857 | return NULL; |
| 858 | s2++; |
| 859 | } |
| 860 | *s1++ = '\0'; |
| 861 | |
| 862 | s2 = skip_spaces (s2); |
| 863 | if (found_quote) |
| 864 | { |
| 865 | if (*s2 == '\'') |
| 866 | s2++; |
| 867 | s2 = skip_spaces (s2); |
| 868 | } |
| 869 | |
| 870 | if (selector != NULL) |
| 871 | *selector = nselector; |
| 872 | |
| 873 | return s2; |
| 874 | } |
| 875 | |
| 876 | static char * |
| 877 | parse_method (char *method, char *type, char **theclass, |
| 878 | char **category, char **selector) |
| 879 | { |
| 880 | char *s1 = NULL; |
| 881 | char *s2 = NULL; |
| 882 | int found_quote = 0; |
| 883 | |
| 884 | char ntype = '\0'; |
| 885 | char *nclass = NULL; |
| 886 | char *ncategory = NULL; |
| 887 | char *nselector = NULL; |
| 888 | |
| 889 | gdb_assert (type != NULL); |
| 890 | gdb_assert (theclass != NULL); |
| 891 | gdb_assert (category != NULL); |
| 892 | gdb_assert (selector != NULL); |
| 893 | |
| 894 | s1 = method; |
| 895 | |
| 896 | s1 = skip_spaces (s1); |
| 897 | if (*s1 == '\'') |
| 898 | { |
| 899 | found_quote = 1; |
| 900 | s1++; |
| 901 | } |
| 902 | s1 = skip_spaces (s1); |
| 903 | |
| 904 | if ((s1[0] == '+') || (s1[0] == '-')) |
| 905 | ntype = *s1++; |
| 906 | |
| 907 | s1 = skip_spaces (s1); |
| 908 | |
| 909 | if (*s1 != '[') |
| 910 | return NULL; |
| 911 | s1++; |
| 912 | |
| 913 | nclass = s1; |
| 914 | while (isalnum (*s1) || (*s1 == '_')) |
| 915 | s1++; |
| 916 | |
| 917 | s2 = s1; |
| 918 | s2 = skip_spaces (s2); |
| 919 | |
| 920 | if (*s2 == '(') |
| 921 | { |
| 922 | s2++; |
| 923 | s2 = skip_spaces (s2); |
| 924 | ncategory = s2; |
| 925 | while (isalnum (*s2) || (*s2 == '_')) |
| 926 | s2++; |
| 927 | *s2++ = '\0'; |
| 928 | } |
| 929 | |
| 930 | /* Truncate the class name now that we're not using the open paren. */ |
| 931 | *s1++ = '\0'; |
| 932 | |
| 933 | nselector = s2; |
| 934 | s1 = s2; |
| 935 | |
| 936 | for (;;) |
| 937 | { |
| 938 | if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':')) |
| 939 | *s1++ = *s2; |
| 940 | else if (isspace (*s2)) |
| 941 | ; |
| 942 | else if (*s2 == ']') |
| 943 | break; |
| 944 | else |
| 945 | return NULL; |
| 946 | s2++; |
| 947 | } |
| 948 | *s1++ = '\0'; |
| 949 | s2++; |
| 950 | |
| 951 | s2 = skip_spaces (s2); |
| 952 | if (found_quote) |
| 953 | { |
| 954 | if (*s2 != '\'') |
| 955 | return NULL; |
| 956 | s2++; |
| 957 | s2 = skip_spaces (s2); |
| 958 | } |
| 959 | |
| 960 | if (type != NULL) |
| 961 | *type = ntype; |
| 962 | if (theclass != NULL) |
| 963 | *theclass = nclass; |
| 964 | if (category != NULL) |
| 965 | *category = ncategory; |
| 966 | if (selector != NULL) |
| 967 | *selector = nselector; |
| 968 | |
| 969 | return s2; |
| 970 | } |
| 971 | |
| 972 | static void |
| 973 | find_methods (char type, const char *theclass, const char *category, |
| 974 | const char *selector, |
| 975 | VEC (const_char_ptr) **symbol_names) |
| 976 | { |
| 977 | struct objfile *objfile = NULL; |
| 978 | |
| 979 | const char *symname = NULL; |
| 980 | |
| 981 | char ntype = '\0'; |
| 982 | char *nclass = NULL; |
| 983 | char *ncategory = NULL; |
| 984 | char *nselector = NULL; |
| 985 | |
| 986 | static char *tmp = NULL; |
| 987 | static unsigned int tmplen = 0; |
| 988 | |
| 989 | gdb_assert (symbol_names != NULL); |
| 990 | |
| 991 | ALL_OBJFILES (objfile) |
| 992 | { |
| 993 | unsigned int *objc_csym; |
| 994 | struct minimal_symbol *msymbol = NULL; |
| 995 | |
| 996 | /* The objfile_csym variable counts the number of ObjC methods |
| 997 | that this objfile defines. We save that count as a private |
| 998 | objfile data. If we have already determined that this objfile |
| 999 | provides no ObjC methods, we can skip it entirely. */ |
| 1000 | |
| 1001 | unsigned int objfile_csym = 0; |
| 1002 | |
| 1003 | objc_csym = (unsigned int *) objfile_data (objfile, objc_objfile_data); |
| 1004 | if (objc_csym != NULL && *objc_csym == 0) |
| 1005 | /* There are no ObjC symbols in this objfile. Skip it entirely. */ |
| 1006 | continue; |
| 1007 | |
| 1008 | ALL_OBJFILE_MSYMBOLS (objfile, msymbol) |
| 1009 | { |
| 1010 | QUIT; |
| 1011 | |
| 1012 | /* Check the symbol name first as this can be done entirely without |
| 1013 | sending any query to the target. */ |
| 1014 | symname = MSYMBOL_NATURAL_NAME (msymbol); |
| 1015 | if (symname == NULL) |
| 1016 | continue; |
| 1017 | |
| 1018 | if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '[')) |
| 1019 | /* Not a method name. */ |
| 1020 | continue; |
| 1021 | |
| 1022 | objfile_csym++; |
| 1023 | |
| 1024 | /* Now that thinks are a bit sane, clean up the symname. */ |
| 1025 | while ((strlen (symname) + 1) >= tmplen) |
| 1026 | { |
| 1027 | tmplen = (tmplen == 0) ? 1024 : tmplen * 2; |
| 1028 | tmp = (char *) xrealloc (tmp, tmplen); |
| 1029 | } |
| 1030 | strcpy (tmp, symname); |
| 1031 | |
| 1032 | if (parse_method (tmp, &ntype, &nclass, |
| 1033 | &ncategory, &nselector) == NULL) |
| 1034 | continue; |
| 1035 | |
| 1036 | if ((type != '\0') && (ntype != type)) |
| 1037 | continue; |
| 1038 | |
| 1039 | if ((theclass != NULL) |
| 1040 | && ((nclass == NULL) || (strcmp (theclass, nclass) != 0))) |
| 1041 | continue; |
| 1042 | |
| 1043 | if ((category != NULL) && |
| 1044 | ((ncategory == NULL) || (strcmp (category, ncategory) != 0))) |
| 1045 | continue; |
| 1046 | |
| 1047 | if ((selector != NULL) && |
| 1048 | ((nselector == NULL) || (strcmp (selector, nselector) != 0))) |
| 1049 | continue; |
| 1050 | |
| 1051 | VEC_safe_push (const_char_ptr, *symbol_names, symname); |
| 1052 | } |
| 1053 | |
| 1054 | if (objc_csym == NULL) |
| 1055 | { |
| 1056 | objc_csym = XOBNEW (&objfile->objfile_obstack, unsigned int); |
| 1057 | *objc_csym = objfile_csym; |
| 1058 | set_objfile_data (objfile, objc_objfile_data, objc_csym); |
| 1059 | } |
| 1060 | else |
| 1061 | /* Count of ObjC methods in this objfile should be constant. */ |
| 1062 | gdb_assert (*objc_csym == objfile_csym); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | /* Uniquify a VEC of strings. */ |
| 1067 | |
| 1068 | static void |
| 1069 | uniquify_strings (VEC (const_char_ptr) **strings) |
| 1070 | { |
| 1071 | int ix; |
| 1072 | const char *elem, *last = NULL; |
| 1073 | int out; |
| 1074 | |
| 1075 | /* If the vector is empty, there's nothing to do. This explicit |
| 1076 | check is needed to avoid invoking qsort with NULL. */ |
| 1077 | if (VEC_empty (const_char_ptr, *strings)) |
| 1078 | return; |
| 1079 | |
| 1080 | qsort (VEC_address (const_char_ptr, *strings), |
| 1081 | VEC_length (const_char_ptr, *strings), |
| 1082 | sizeof (const_char_ptr), |
| 1083 | compare_strings); |
| 1084 | out = 0; |
| 1085 | for (ix = 0; VEC_iterate (const_char_ptr, *strings, ix, elem); ++ix) |
| 1086 | { |
| 1087 | if (last == NULL || strcmp (last, elem) != 0) |
| 1088 | { |
| 1089 | /* Keep ELEM. */ |
| 1090 | VEC_replace (const_char_ptr, *strings, out, elem); |
| 1091 | ++out; |
| 1092 | } |
| 1093 | last = elem; |
| 1094 | } |
| 1095 | VEC_truncate (const_char_ptr, *strings, out); |
| 1096 | } |
| 1097 | |
| 1098 | /* |
| 1099 | * Function: find_imps (const char *selector, struct symbol **sym_arr) |
| 1100 | * |
| 1101 | * Input: a string representing a selector |
| 1102 | * a pointer to an array of symbol pointers |
| 1103 | * possibly a pointer to a symbol found by the caller. |
| 1104 | * |
| 1105 | * Output: number of methods that implement that selector. Side |
| 1106 | * effects: The array of symbol pointers is filled with matching syms. |
| 1107 | * |
| 1108 | * By analogy with function "find_methods" (symtab.c), builds a list |
| 1109 | * of symbols matching the ambiguous input, so that "decode_line_2" |
| 1110 | * (symtab.c) can list them and ask the user to choose one or more. |
| 1111 | * In this case the matches are objective c methods |
| 1112 | * ("implementations") matching an objective c selector. |
| 1113 | * |
| 1114 | * Note that it is possible for a normal (c-style) function to have |
| 1115 | * the same name as an objective c selector. To prevent the selector |
| 1116 | * from eclipsing the function, we allow the caller (decode_line_1) to |
| 1117 | * search for such a function first, and if it finds one, pass it in |
| 1118 | * to us. We will then integrate it into the list. We also search |
| 1119 | * for one here, among the minsyms. |
| 1120 | * |
| 1121 | * NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be divided |
| 1122 | * into two parts: debuggable (struct symbol) syms, and |
| 1123 | * non_debuggable (struct minimal_symbol) syms. The debuggable |
| 1124 | * ones will come first, before NUM_DEBUGGABLE (which will thus |
| 1125 | * be the index of the first non-debuggable one). |
| 1126 | */ |
| 1127 | |
| 1128 | const char * |
| 1129 | find_imps (const char *method, VEC (const_char_ptr) **symbol_names) |
| 1130 | { |
| 1131 | char type = '\0'; |
| 1132 | char *theclass = NULL; |
| 1133 | char *category = NULL; |
| 1134 | char *selector = NULL; |
| 1135 | |
| 1136 | char *buf = NULL; |
| 1137 | char *tmp = NULL; |
| 1138 | |
| 1139 | int selector_case = 0; |
| 1140 | |
| 1141 | gdb_assert (symbol_names != NULL); |
| 1142 | |
| 1143 | buf = (char *) alloca (strlen (method) + 1); |
| 1144 | strcpy (buf, method); |
| 1145 | tmp = parse_method (buf, &type, &theclass, &category, &selector); |
| 1146 | |
| 1147 | if (tmp == NULL) |
| 1148 | { |
| 1149 | strcpy (buf, method); |
| 1150 | tmp = parse_selector (buf, &selector); |
| 1151 | |
| 1152 | if (tmp == NULL) |
| 1153 | return NULL; |
| 1154 | |
| 1155 | selector_case = 1; |
| 1156 | } |
| 1157 | |
| 1158 | find_methods (type, theclass, category, selector, symbol_names); |
| 1159 | |
| 1160 | /* If we hit the "selector" case, and we found some methods, then |
| 1161 | add the selector itself as a symbol, if it exists. */ |
| 1162 | if (selector_case && !VEC_empty (const_char_ptr, *symbol_names)) |
| 1163 | { |
| 1164 | struct symbol *sym = lookup_symbol (selector, NULL, VAR_DOMAIN, |
| 1165 | 0).symbol; |
| 1166 | |
| 1167 | if (sym != NULL) |
| 1168 | VEC_safe_push (const_char_ptr, *symbol_names, |
| 1169 | SYMBOL_NATURAL_NAME (sym)); |
| 1170 | else |
| 1171 | { |
| 1172 | struct bound_minimal_symbol msym |
| 1173 | = lookup_minimal_symbol (selector, 0, 0); |
| 1174 | |
| 1175 | if (msym.minsym != NULL) |
| 1176 | VEC_safe_push (const_char_ptr, *symbol_names, |
| 1177 | MSYMBOL_NATURAL_NAME (msym.minsym)); |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | uniquify_strings (symbol_names); |
| 1182 | |
| 1183 | return method + (tmp - buf); |
| 1184 | } |
| 1185 | |
| 1186 | static void |
| 1187 | print_object_command (char *args, int from_tty) |
| 1188 | { |
| 1189 | struct value *object, *function, *description; |
| 1190 | CORE_ADDR string_addr, object_addr; |
| 1191 | int i = 0; |
| 1192 | gdb_byte c = 0; |
| 1193 | |
| 1194 | if (!args || !*args) |
| 1195 | error ( |
| 1196 | "The 'print-object' command requires an argument (an Objective-C object)"); |
| 1197 | |
| 1198 | { |
| 1199 | expression_up expr = parse_expression (args); |
| 1200 | int pc = 0; |
| 1201 | |
| 1202 | object = evaluate_subexp (builtin_type (expr->gdbarch)->builtin_data_ptr, |
| 1203 | expr.get (), &pc, EVAL_NORMAL); |
| 1204 | } |
| 1205 | |
| 1206 | /* Validate the address for sanity. */ |
| 1207 | object_addr = value_as_long (object); |
| 1208 | read_memory (object_addr, &c, 1); |
| 1209 | |
| 1210 | function = find_function_in_inferior ("_NSPrintForDebugger", NULL); |
| 1211 | if (function == NULL) |
| 1212 | error (_("Unable to locate _NSPrintForDebugger in child process")); |
| 1213 | |
| 1214 | description = call_function_by_hand (function, NULL, 1, &object); |
| 1215 | |
| 1216 | string_addr = value_as_long (description); |
| 1217 | if (string_addr == 0) |
| 1218 | error (_("object returns null description")); |
| 1219 | |
| 1220 | read_memory (string_addr + i++, &c, 1); |
| 1221 | if (c != 0) |
| 1222 | do |
| 1223 | { /* Read and print characters up to EOS. */ |
| 1224 | QUIT; |
| 1225 | printf_filtered ("%c", c); |
| 1226 | read_memory (string_addr + i++, &c, 1); |
| 1227 | } while (c != 0); |
| 1228 | else |
| 1229 | printf_filtered(_("<object returns empty description>")); |
| 1230 | printf_filtered ("\n"); |
| 1231 | } |
| 1232 | |
| 1233 | /* The data structure 'methcalls' is used to detect method calls (thru |
| 1234 | * ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.), |
| 1235 | * and ultimately find the method being called. |
| 1236 | */ |
| 1237 | |
| 1238 | struct objc_methcall { |
| 1239 | const char *name; |
| 1240 | /* Return instance method to be called. */ |
| 1241 | int (*stop_at) (CORE_ADDR, CORE_ADDR *); |
| 1242 | /* Start of pc range corresponding to method invocation. */ |
| 1243 | CORE_ADDR begin; |
| 1244 | /* End of pc range corresponding to method invocation. */ |
| 1245 | CORE_ADDR end; |
| 1246 | }; |
| 1247 | |
| 1248 | static int resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1249 | static int resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1250 | static int resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1251 | static int resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1252 | |
| 1253 | static struct objc_methcall methcalls[] = { |
| 1254 | { "_objc_msgSend", resolve_msgsend, 0, 0}, |
| 1255 | { "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0}, |
| 1256 | { "_objc_msgSendSuper", resolve_msgsend_super, 0, 0}, |
| 1257 | { "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0}, |
| 1258 | { "_objc_getClass", NULL, 0, 0}, |
| 1259 | { "_objc_getMetaClass", NULL, 0, 0} |
| 1260 | }; |
| 1261 | |
| 1262 | #define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0])) |
| 1263 | |
| 1264 | /* The following function, "find_objc_msgsend", fills in the data |
| 1265 | * structure "objc_msgs" by finding the addresses of each of the |
| 1266 | * (currently four) functions that it holds (of which objc_msgSend is |
| 1267 | * the first). This must be called each time symbols are loaded, in |
| 1268 | * case the functions have moved for some reason. |
| 1269 | */ |
| 1270 | |
| 1271 | static void |
| 1272 | find_objc_msgsend (void) |
| 1273 | { |
| 1274 | unsigned int i; |
| 1275 | |
| 1276 | for (i = 0; i < nmethcalls; i++) |
| 1277 | { |
| 1278 | struct bound_minimal_symbol func; |
| 1279 | |
| 1280 | /* Try both with and without underscore. */ |
| 1281 | func = lookup_bound_minimal_symbol (methcalls[i].name); |
| 1282 | if ((func.minsym == NULL) && (methcalls[i].name[0] == '_')) |
| 1283 | { |
| 1284 | func = lookup_bound_minimal_symbol (methcalls[i].name + 1); |
| 1285 | } |
| 1286 | if (func.minsym == NULL) |
| 1287 | { |
| 1288 | methcalls[i].begin = 0; |
| 1289 | methcalls[i].end = 0; |
| 1290 | continue; |
| 1291 | } |
| 1292 | |
| 1293 | methcalls[i].begin = BMSYMBOL_VALUE_ADDRESS (func); |
| 1294 | methcalls[i].end = minimal_symbol_upper_bound (func); |
| 1295 | } |
| 1296 | } |
| 1297 | |
| 1298 | /* find_objc_msgcall (replaces pc_off_limits) |
| 1299 | * |
| 1300 | * ALL that this function now does is to determine whether the input |
| 1301 | * address ("pc") is the address of one of the Objective-C message |
| 1302 | * dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and |
| 1303 | * if so, it returns the address of the method that will be called. |
| 1304 | * |
| 1305 | * The old function "pc_off_limits" used to do a lot of other things |
| 1306 | * in addition, such as detecting shared library jump stubs and |
| 1307 | * returning the address of the shlib function that would be called. |
| 1308 | * That functionality has been moved into the gdbarch_skip_trampoline_code and |
| 1309 | * IN_SOLIB_TRAMPOLINE macros, which are resolved in the target- |
| 1310 | * dependent modules. |
| 1311 | */ |
| 1312 | |
| 1313 | struct objc_submethod_helper_data { |
| 1314 | int (*f) (CORE_ADDR, CORE_ADDR *); |
| 1315 | CORE_ADDR pc; |
| 1316 | CORE_ADDR *new_pc; |
| 1317 | }; |
| 1318 | |
| 1319 | static int |
| 1320 | find_objc_msgcall_submethod_helper (void * arg) |
| 1321 | { |
| 1322 | struct objc_submethod_helper_data *s = |
| 1323 | (struct objc_submethod_helper_data *) arg; |
| 1324 | |
| 1325 | if (s->f (s->pc, s->new_pc) == 0) |
| 1326 | return 1; |
| 1327 | else |
| 1328 | return 0; |
| 1329 | } |
| 1330 | |
| 1331 | static int |
| 1332 | find_objc_msgcall_submethod (int (*f) (CORE_ADDR, CORE_ADDR *), |
| 1333 | CORE_ADDR pc, |
| 1334 | CORE_ADDR *new_pc) |
| 1335 | { |
| 1336 | struct objc_submethod_helper_data s; |
| 1337 | |
| 1338 | s.f = f; |
| 1339 | s.pc = pc; |
| 1340 | s.new_pc = new_pc; |
| 1341 | |
| 1342 | if (catch_errors (find_objc_msgcall_submethod_helper, |
| 1343 | (void *) &s, |
| 1344 | "Unable to determine target of " |
| 1345 | "Objective-C method call (ignoring):\n", |
| 1346 | RETURN_MASK_ALL) == 0) |
| 1347 | return 1; |
| 1348 | else |
| 1349 | return 0; |
| 1350 | } |
| 1351 | |
| 1352 | int |
| 1353 | find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1354 | { |
| 1355 | unsigned int i; |
| 1356 | |
| 1357 | find_objc_msgsend (); |
| 1358 | if (new_pc != NULL) |
| 1359 | { |
| 1360 | *new_pc = 0; |
| 1361 | } |
| 1362 | |
| 1363 | for (i = 0; i < nmethcalls; i++) |
| 1364 | if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end)) |
| 1365 | { |
| 1366 | if (methcalls[i].stop_at != NULL) |
| 1367 | return find_objc_msgcall_submethod (methcalls[i].stop_at, |
| 1368 | pc, new_pc); |
| 1369 | else |
| 1370 | return 0; |
| 1371 | } |
| 1372 | |
| 1373 | return 0; |
| 1374 | } |
| 1375 | |
| 1376 | void |
| 1377 | _initialize_objc_language (void) |
| 1378 | { |
| 1379 | add_info ("selectors", info_selectors_command, |
| 1380 | _("All Objective-C selectors, or those matching REGEXP.")); |
| 1381 | add_info ("classes", info_classes_command, |
| 1382 | _("All Objective-C classes, or those matching REGEXP.")); |
| 1383 | add_com ("print-object", class_vars, print_object_command, |
| 1384 | _("Ask an Objective-C object to print itself.")); |
| 1385 | add_com_alias ("po", "print-object", class_vars, 1); |
| 1386 | } |
| 1387 | |
| 1388 | static void |
| 1389 | read_objc_method (struct gdbarch *gdbarch, CORE_ADDR addr, |
| 1390 | struct objc_method *method) |
| 1391 | { |
| 1392 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1393 | |
| 1394 | method->name = read_memory_unsigned_integer (addr + 0, 4, byte_order); |
| 1395 | method->types = read_memory_unsigned_integer (addr + 4, 4, byte_order); |
| 1396 | method->imp = read_memory_unsigned_integer (addr + 8, 4, byte_order); |
| 1397 | } |
| 1398 | |
| 1399 | static unsigned long |
| 1400 | read_objc_methlist_nmethods (struct gdbarch *gdbarch, CORE_ADDR addr) |
| 1401 | { |
| 1402 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1403 | |
| 1404 | return read_memory_unsigned_integer (addr + 4, 4, byte_order); |
| 1405 | } |
| 1406 | |
| 1407 | static void |
| 1408 | read_objc_methlist_method (struct gdbarch *gdbarch, CORE_ADDR addr, |
| 1409 | unsigned long num, struct objc_method *method) |
| 1410 | { |
| 1411 | gdb_assert (num < read_objc_methlist_nmethods (gdbarch, addr)); |
| 1412 | read_objc_method (gdbarch, addr + 8 + (12 * num), method); |
| 1413 | } |
| 1414 | |
| 1415 | static void |
| 1416 | read_objc_object (struct gdbarch *gdbarch, CORE_ADDR addr, |
| 1417 | struct objc_object *object) |
| 1418 | { |
| 1419 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1420 | |
| 1421 | object->isa = read_memory_unsigned_integer (addr, 4, byte_order); |
| 1422 | } |
| 1423 | |
| 1424 | static void |
| 1425 | read_objc_super (struct gdbarch *gdbarch, CORE_ADDR addr, |
| 1426 | struct objc_super *super) |
| 1427 | { |
| 1428 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1429 | |
| 1430 | super->receiver = read_memory_unsigned_integer (addr, 4, byte_order); |
| 1431 | super->theclass = read_memory_unsigned_integer (addr + 4, 4, byte_order); |
| 1432 | }; |
| 1433 | |
| 1434 | static void |
| 1435 | read_objc_class (struct gdbarch *gdbarch, CORE_ADDR addr, |
| 1436 | struct objc_class *theclass) |
| 1437 | { |
| 1438 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1439 | |
| 1440 | theclass->isa = read_memory_unsigned_integer (addr, 4, byte_order); |
| 1441 | theclass->super_class = read_memory_unsigned_integer (addr + 4, 4, byte_order); |
| 1442 | theclass->name = read_memory_unsigned_integer (addr + 8, 4, byte_order); |
| 1443 | theclass->version = read_memory_unsigned_integer (addr + 12, 4, byte_order); |
| 1444 | theclass->info = read_memory_unsigned_integer (addr + 16, 4, byte_order); |
| 1445 | theclass->instance_size = read_memory_unsigned_integer (addr + 18, 4, |
| 1446 | byte_order); |
| 1447 | theclass->ivars = read_memory_unsigned_integer (addr + 24, 4, byte_order); |
| 1448 | theclass->methods = read_memory_unsigned_integer (addr + 28, 4, byte_order); |
| 1449 | theclass->cache = read_memory_unsigned_integer (addr + 32, 4, byte_order); |
| 1450 | theclass->protocols = read_memory_unsigned_integer (addr + 36, 4, byte_order); |
| 1451 | } |
| 1452 | |
| 1453 | static CORE_ADDR |
| 1454 | find_implementation_from_class (struct gdbarch *gdbarch, |
| 1455 | CORE_ADDR theclass, CORE_ADDR sel) |
| 1456 | { |
| 1457 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1458 | CORE_ADDR subclass = theclass; |
| 1459 | |
| 1460 | while (subclass != 0) |
| 1461 | { |
| 1462 | |
| 1463 | struct objc_class class_str; |
| 1464 | unsigned mlistnum = 0; |
| 1465 | |
| 1466 | read_objc_class (gdbarch, subclass, &class_str); |
| 1467 | |
| 1468 | for (;;) |
| 1469 | { |
| 1470 | CORE_ADDR mlist; |
| 1471 | unsigned long nmethods; |
| 1472 | unsigned long i; |
| 1473 | |
| 1474 | mlist = read_memory_unsigned_integer (class_str.methods + |
| 1475 | (4 * mlistnum), |
| 1476 | 4, byte_order); |
| 1477 | if (mlist == 0) |
| 1478 | break; |
| 1479 | |
| 1480 | nmethods = read_objc_methlist_nmethods (gdbarch, mlist); |
| 1481 | |
| 1482 | for (i = 0; i < nmethods; i++) |
| 1483 | { |
| 1484 | struct objc_method meth_str; |
| 1485 | |
| 1486 | read_objc_methlist_method (gdbarch, mlist, i, &meth_str); |
| 1487 | |
| 1488 | if (meth_str.name == sel) |
| 1489 | /* FIXME: hppa arch was doing a pointer dereference |
| 1490 | here. There needs to be a better way to do that. */ |
| 1491 | return meth_str.imp; |
| 1492 | } |
| 1493 | mlistnum++; |
| 1494 | } |
| 1495 | subclass = class_str.super_class; |
| 1496 | } |
| 1497 | |
| 1498 | return 0; |
| 1499 | } |
| 1500 | |
| 1501 | static CORE_ADDR |
| 1502 | find_implementation (struct gdbarch *gdbarch, |
| 1503 | CORE_ADDR object, CORE_ADDR sel) |
| 1504 | { |
| 1505 | struct objc_object ostr; |
| 1506 | |
| 1507 | if (object == 0) |
| 1508 | return 0; |
| 1509 | read_objc_object (gdbarch, object, &ostr); |
| 1510 | if (ostr.isa == 0) |
| 1511 | return 0; |
| 1512 | |
| 1513 | return find_implementation_from_class (gdbarch, ostr.isa, sel); |
| 1514 | } |
| 1515 | |
| 1516 | static int |
| 1517 | resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1518 | { |
| 1519 | struct frame_info *frame = get_current_frame (); |
| 1520 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1521 | struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr; |
| 1522 | |
| 1523 | CORE_ADDR object; |
| 1524 | CORE_ADDR sel; |
| 1525 | CORE_ADDR res; |
| 1526 | |
| 1527 | object = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type); |
| 1528 | sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type); |
| 1529 | |
| 1530 | res = find_implementation (gdbarch, object, sel); |
| 1531 | if (new_pc != 0) |
| 1532 | *new_pc = res; |
| 1533 | if (res == 0) |
| 1534 | return 1; |
| 1535 | return 0; |
| 1536 | } |
| 1537 | |
| 1538 | static int |
| 1539 | resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1540 | { |
| 1541 | struct frame_info *frame = get_current_frame (); |
| 1542 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1543 | struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr; |
| 1544 | |
| 1545 | CORE_ADDR object; |
| 1546 | CORE_ADDR sel; |
| 1547 | CORE_ADDR res; |
| 1548 | |
| 1549 | object = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type); |
| 1550 | sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type); |
| 1551 | |
| 1552 | res = find_implementation (gdbarch, object, sel); |
| 1553 | if (new_pc != 0) |
| 1554 | *new_pc = res; |
| 1555 | if (res == 0) |
| 1556 | return 1; |
| 1557 | return 0; |
| 1558 | } |
| 1559 | |
| 1560 | static int |
| 1561 | resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1562 | { |
| 1563 | struct frame_info *frame = get_current_frame (); |
| 1564 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1565 | struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr; |
| 1566 | |
| 1567 | struct objc_super sstr; |
| 1568 | |
| 1569 | CORE_ADDR super; |
| 1570 | CORE_ADDR sel; |
| 1571 | CORE_ADDR res; |
| 1572 | |
| 1573 | super = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type); |
| 1574 | sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type); |
| 1575 | |
| 1576 | read_objc_super (gdbarch, super, &sstr); |
| 1577 | if (sstr.theclass == 0) |
| 1578 | return 0; |
| 1579 | |
| 1580 | res = find_implementation_from_class (gdbarch, sstr.theclass, sel); |
| 1581 | if (new_pc != 0) |
| 1582 | *new_pc = res; |
| 1583 | if (res == 0) |
| 1584 | return 1; |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
| 1588 | static int |
| 1589 | resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1590 | { |
| 1591 | struct frame_info *frame = get_current_frame (); |
| 1592 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1593 | struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr; |
| 1594 | |
| 1595 | struct objc_super sstr; |
| 1596 | |
| 1597 | CORE_ADDR super; |
| 1598 | CORE_ADDR sel; |
| 1599 | CORE_ADDR res; |
| 1600 | |
| 1601 | super = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type); |
| 1602 | sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type); |
| 1603 | |
| 1604 | read_objc_super (gdbarch, super, &sstr); |
| 1605 | if (sstr.theclass == 0) |
| 1606 | return 0; |
| 1607 | |
| 1608 | res = find_implementation_from_class (gdbarch, sstr.theclass, sel); |
| 1609 | if (new_pc != 0) |
| 1610 | *new_pc = res; |
| 1611 | if (res == 0) |
| 1612 | return 1; |
| 1613 | return 0; |
| 1614 | } |
| 1615 | |
| 1616 | void |
| 1617 | _initialize_objc_lang (void) |
| 1618 | { |
| 1619 | objc_objfile_data = register_objfile_data (); |
| 1620 | } |