| 1 | /* Objective-C language support routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 2002, 2003, 2004 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 2 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, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | #include "symtab.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "expression.h" |
| 29 | #include "parser-defs.h" |
| 30 | #include "language.h" |
| 31 | #include "c-lang.h" |
| 32 | #include "objc-lang.h" |
| 33 | #include "complaints.h" |
| 34 | #include "value.h" |
| 35 | #include "symfile.h" |
| 36 | #include "objfiles.h" |
| 37 | #include "gdb_string.h" /* for strchr */ |
| 38 | #include "target.h" /* for target_has_execution */ |
| 39 | #include "gdbcore.h" |
| 40 | #include "gdbcmd.h" |
| 41 | #include "frame.h" |
| 42 | #include "gdb_regex.h" |
| 43 | #include "regcache.h" |
| 44 | #include "block.h" |
| 45 | #include "infcall.h" |
| 46 | #include "valprint.h" |
| 47 | #include "gdb_assert.h" |
| 48 | |
| 49 | #include <ctype.h> |
| 50 | |
| 51 | struct objc_object { |
| 52 | CORE_ADDR isa; |
| 53 | }; |
| 54 | |
| 55 | struct objc_class { |
| 56 | CORE_ADDR isa; |
| 57 | CORE_ADDR super_class; |
| 58 | CORE_ADDR name; |
| 59 | long version; |
| 60 | long info; |
| 61 | long instance_size; |
| 62 | CORE_ADDR ivars; |
| 63 | CORE_ADDR methods; |
| 64 | CORE_ADDR cache; |
| 65 | CORE_ADDR protocols; |
| 66 | }; |
| 67 | |
| 68 | struct objc_super { |
| 69 | CORE_ADDR receiver; |
| 70 | CORE_ADDR class; |
| 71 | }; |
| 72 | |
| 73 | struct objc_method { |
| 74 | CORE_ADDR name; |
| 75 | CORE_ADDR types; |
| 76 | CORE_ADDR imp; |
| 77 | }; |
| 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 (char *name, struct block *block, int noerr) |
| 85 | { |
| 86 | struct symbol *sym; |
| 87 | |
| 88 | sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0, |
| 89 | (struct symtab **) NULL); |
| 90 | |
| 91 | if (sym == NULL) |
| 92 | { |
| 93 | if (noerr) |
| 94 | return 0; |
| 95 | else |
| 96 | error ("No struct type named %s.", name); |
| 97 | } |
| 98 | if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT) |
| 99 | { |
| 100 | if (noerr) |
| 101 | return 0; |
| 102 | else |
| 103 | error ("This context has class, union or enum %s, not a struct.", |
| 104 | name); |
| 105 | } |
| 106 | return sym; |
| 107 | } |
| 108 | |
| 109 | CORE_ADDR |
| 110 | lookup_objc_class (char *classname) |
| 111 | { |
| 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)) |
| 121 | function = find_function_in_inferior("objc_lookUpClass"); |
| 122 | else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0)) |
| 123 | function = find_function_in_inferior("objc_lookup_class"); |
| 124 | else |
| 125 | { |
| 126 | complaint (&symfile_complaints, "no way to lookup Objective-C classes"); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | classval = value_string (classname, strlen (classname) + 1); |
| 131 | classval = value_coerce_array (classval); |
| 132 | return (CORE_ADDR) value_as_long (call_function_by_hand (function, |
| 133 | 1, &classval)); |
| 134 | } |
| 135 | |
| 136 | CORE_ADDR |
| 137 | lookup_child_selector (char *selname) |
| 138 | { |
| 139 | struct value * function, *selstring; |
| 140 | |
| 141 | if (! target_has_execution) |
| 142 | { |
| 143 | /* Can't call into inferior to lookup selector. */ |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | if (lookup_minimal_symbol("sel_getUid", 0, 0)) |
| 148 | function = find_function_in_inferior("sel_getUid"); |
| 149 | else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0)) |
| 150 | function = find_function_in_inferior("sel_get_any_uid"); |
| 151 | else |
| 152 | { |
| 153 | complaint (&symfile_complaints, "no way to lookup Objective-C selectors"); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | selstring = value_coerce_array (value_string (selname, |
| 158 | strlen (selname) + 1)); |
| 159 | return value_as_long (call_function_by_hand (function, 1, &selstring)); |
| 160 | } |
| 161 | |
| 162 | struct value * |
| 163 | value_nsstring (char *ptr, int len) |
| 164 | { |
| 165 | struct value *stringValue[3]; |
| 166 | struct value *function, *nsstringValue; |
| 167 | struct symbol *sym; |
| 168 | struct type *type; |
| 169 | |
| 170 | if (!target_has_execution) |
| 171 | return 0; /* Can't call into inferior to create NSString. */ |
| 172 | |
| 173 | sym = lookup_struct_typedef("NSString", 0, 1); |
| 174 | if (sym == NULL) |
| 175 | sym = lookup_struct_typedef("NXString", 0, 1); |
| 176 | if (sym == NULL) |
| 177 | type = lookup_pointer_type(builtin_type_void); |
| 178 | else |
| 179 | type = lookup_pointer_type(SYMBOL_TYPE (sym)); |
| 180 | |
| 181 | stringValue[2] = value_string(ptr, len); |
| 182 | stringValue[2] = value_coerce_array(stringValue[2]); |
| 183 | /* _NSNewStringFromCString replaces "istr" after Lantern2A. */ |
| 184 | if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0)) |
| 185 | { |
| 186 | function = find_function_in_inferior("_NSNewStringFromCString"); |
| 187 | nsstringValue = call_function_by_hand(function, 1, &stringValue[2]); |
| 188 | } |
| 189 | else if (lookup_minimal_symbol("istr", 0, 0)) |
| 190 | { |
| 191 | function = find_function_in_inferior("istr"); |
| 192 | nsstringValue = call_function_by_hand(function, 1, &stringValue[2]); |
| 193 | } |
| 194 | else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0)) |
| 195 | { |
| 196 | function = find_function_in_inferior("+[NSString stringWithCString:]"); |
| 197 | stringValue[0] = value_from_longest |
| 198 | (builtin_type_long, lookup_objc_class ("NSString")); |
| 199 | stringValue[1] = value_from_longest |
| 200 | (builtin_type_long, lookup_child_selector ("stringWithCString:")); |
| 201 | nsstringValue = call_function_by_hand(function, 3, &stringValue[0]); |
| 202 | } |
| 203 | else |
| 204 | error ("NSString: internal error -- no way to create new NSString"); |
| 205 | |
| 206 | VALUE_TYPE(nsstringValue) = type; |
| 207 | return nsstringValue; |
| 208 | } |
| 209 | |
| 210 | /* Objective-C name demangling. */ |
| 211 | |
| 212 | char * |
| 213 | objc_demangle (const char *mangled, int options) |
| 214 | { |
| 215 | char *demangled, *cp; |
| 216 | |
| 217 | if (mangled[0] == '_' && |
| 218 | (mangled[1] == 'i' || mangled[1] == 'c') && |
| 219 | mangled[2] == '_') |
| 220 | { |
| 221 | cp = demangled = xmalloc(strlen(mangled) + 2); |
| 222 | |
| 223 | if (mangled[1] == 'i') |
| 224 | *cp++ = '-'; /* for instance method */ |
| 225 | else |
| 226 | *cp++ = '+'; /* for class method */ |
| 227 | |
| 228 | *cp++ = '['; /* opening left brace */ |
| 229 | strcpy(cp, mangled+3); /* tack on the rest of the mangled name */ |
| 230 | |
| 231 | while (*cp && *cp == '_') |
| 232 | cp++; /* skip any initial underbars in class name */ |
| 233 | |
| 234 | cp = strchr(cp, '_'); |
| 235 | if (!cp) /* find first non-initial underbar */ |
| 236 | { |
| 237 | xfree(demangled); /* not mangled name */ |
| 238 | return NULL; |
| 239 | } |
| 240 | if (cp[1] == '_') { /* easy case: no category name */ |
| 241 | *cp++ = ' '; /* replace two '_' with one ' ' */ |
| 242 | strcpy(cp, mangled + (cp - demangled) + 2); |
| 243 | } |
| 244 | else { |
| 245 | *cp++ = '('; /* less easy case: category name */ |
| 246 | cp = strchr(cp, '_'); |
| 247 | if (!cp) |
| 248 | { |
| 249 | xfree(demangled); /* not mangled name */ |
| 250 | return NULL; |
| 251 | } |
| 252 | *cp++ = ')'; |
| 253 | *cp++ = ' '; /* overwriting 1st char of method name... */ |
| 254 | strcpy(cp, mangled + (cp - demangled)); /* get it back */ |
| 255 | } |
| 256 | |
| 257 | while (*cp && *cp == '_') |
| 258 | cp++; /* skip any initial underbars in method name */ |
| 259 | |
| 260 | for (; *cp; cp++) |
| 261 | if (*cp == '_') |
| 262 | *cp = ':'; /* replace remaining '_' with ':' */ |
| 263 | |
| 264 | *cp++ = ']'; /* closing right brace */ |
| 265 | *cp++ = 0; /* string terminator */ |
| 266 | return demangled; |
| 267 | } |
| 268 | else |
| 269 | return NULL; /* Not an objc mangled name. */ |
| 270 | } |
| 271 | |
| 272 | /* Print the character C on STREAM as part of the contents of a |
| 273 | literal string whose delimiter is QUOTER. Note that that format |
| 274 | for printing characters and strings is language specific. */ |
| 275 | |
| 276 | static void |
| 277 | objc_emit_char (int c, struct ui_file *stream, int quoter) |
| 278 | { |
| 279 | |
| 280 | c &= 0xFF; /* Avoid sign bit follies. */ |
| 281 | |
| 282 | if (PRINT_LITERAL_FORM (c)) |
| 283 | { |
| 284 | if (c == '\\' || c == quoter) |
| 285 | { |
| 286 | fputs_filtered ("\\", stream); |
| 287 | } |
| 288 | fprintf_filtered (stream, "%c", c); |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | switch (c) |
| 293 | { |
| 294 | case '\n': |
| 295 | fputs_filtered ("\\n", stream); |
| 296 | break; |
| 297 | case '\b': |
| 298 | fputs_filtered ("\\b", stream); |
| 299 | break; |
| 300 | case '\t': |
| 301 | fputs_filtered ("\\t", stream); |
| 302 | break; |
| 303 | case '\f': |
| 304 | fputs_filtered ("\\f", stream); |
| 305 | break; |
| 306 | case '\r': |
| 307 | fputs_filtered ("\\r", stream); |
| 308 | break; |
| 309 | case '\033': |
| 310 | fputs_filtered ("\\e", stream); |
| 311 | break; |
| 312 | case '\007': |
| 313 | fputs_filtered ("\\a", stream); |
| 314 | break; |
| 315 | default: |
| 316 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); |
| 317 | break; |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | static void |
| 323 | objc_printchar (int c, struct ui_file *stream) |
| 324 | { |
| 325 | fputs_filtered ("'", stream); |
| 326 | objc_emit_char (c, stream, '\''); |
| 327 | fputs_filtered ("'", stream); |
| 328 | } |
| 329 | |
| 330 | /* Print the character string STRING, printing at most LENGTH |
| 331 | characters. Printing stops early if the number hits print_max; |
| 332 | repeat counts are printed as appropriate. Print ellipses at the |
| 333 | end if we had to stop before printing LENGTH characters, or if |
| 334 | FORCE_ELLIPSES. */ |
| 335 | |
| 336 | static void |
| 337 | objc_printstr (struct ui_file *stream, char *string, |
| 338 | unsigned int length, int width, int force_ellipses) |
| 339 | { |
| 340 | unsigned int i; |
| 341 | unsigned int things_printed = 0; |
| 342 | int in_quotes = 0; |
| 343 | int need_comma = 0; |
| 344 | |
| 345 | /* If the string was not truncated due to `set print elements', and |
| 346 | the last byte of it is a null, we don't print that, in |
| 347 | traditional C style. */ |
| 348 | if ((!force_ellipses) && length > 0 && string[length-1] == '\0') |
| 349 | length--; |
| 350 | |
| 351 | if (length == 0) |
| 352 | { |
| 353 | fputs_filtered ("\"\"", stream); |
| 354 | return; |
| 355 | } |
| 356 | |
| 357 | for (i = 0; i < length && things_printed < print_max; ++i) |
| 358 | { |
| 359 | /* Position of the character we are examining to see whether it |
| 360 | is repeated. */ |
| 361 | unsigned int rep1; |
| 362 | /* Number of repetitions we have detected so far. */ |
| 363 | unsigned int reps; |
| 364 | |
| 365 | QUIT; |
| 366 | |
| 367 | if (need_comma) |
| 368 | { |
| 369 | fputs_filtered (", ", stream); |
| 370 | need_comma = 0; |
| 371 | } |
| 372 | |
| 373 | rep1 = i + 1; |
| 374 | reps = 1; |
| 375 | while (rep1 < length && string[rep1] == string[i]) |
| 376 | { |
| 377 | ++rep1; |
| 378 | ++reps; |
| 379 | } |
| 380 | |
| 381 | if (reps > repeat_count_threshold) |
| 382 | { |
| 383 | if (in_quotes) |
| 384 | { |
| 385 | if (inspect_it) |
| 386 | fputs_filtered ("\\\", ", stream); |
| 387 | else |
| 388 | fputs_filtered ("\", ", stream); |
| 389 | in_quotes = 0; |
| 390 | } |
| 391 | objc_printchar (string[i], stream); |
| 392 | fprintf_filtered (stream, " <repeats %u times>", reps); |
| 393 | i = rep1 - 1; |
| 394 | things_printed += repeat_count_threshold; |
| 395 | need_comma = 1; |
| 396 | } |
| 397 | else |
| 398 | { |
| 399 | if (!in_quotes) |
| 400 | { |
| 401 | if (inspect_it) |
| 402 | fputs_filtered ("\\\"", stream); |
| 403 | else |
| 404 | fputs_filtered ("\"", stream); |
| 405 | in_quotes = 1; |
| 406 | } |
| 407 | objc_emit_char (string[i], stream, '"'); |
| 408 | ++things_printed; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | /* Terminate the quotes if necessary. */ |
| 413 | if (in_quotes) |
| 414 | { |
| 415 | if (inspect_it) |
| 416 | fputs_filtered ("\\\"", stream); |
| 417 | else |
| 418 | fputs_filtered ("\"", stream); |
| 419 | } |
| 420 | |
| 421 | if (force_ellipses || i < length) |
| 422 | fputs_filtered ("...", stream); |
| 423 | } |
| 424 | |
| 425 | /* Create a fundamental C type using default reasonable for the |
| 426 | current target. |
| 427 | |
| 428 | Some object/debugging file formats (DWARF version 1, COFF, etc) do |
| 429 | not define fundamental types such as "int" or "double". Others |
| 430 | (stabs or DWARF version 2, etc) do define fundamental types. For |
| 431 | the formats which don't provide fundamental types, gdb can create |
| 432 | such types using this function. |
| 433 | |
| 434 | FIXME: Some compilers distinguish explicitly signed integral types |
| 435 | (signed short, signed int, signed long) from "regular" integral |
| 436 | types (short, int, long) in the debugging information. There is |
| 437 | some disagreement as to how useful this feature is. In particular, |
| 438 | gcc does not support this. Also, only some debugging formats allow |
| 439 | the distinction to be passed on to a debugger. For now, we always |
| 440 | just use "short", "int", or "long" as the type name, for both the |
| 441 | implicit and explicitly signed types. This also makes life easier |
| 442 | for the gdb test suite since we don't have to account for the |
| 443 | differences in output depending upon what the compiler and |
| 444 | debugging format support. We will probably have to re-examine the |
| 445 | issue when gdb starts taking it's fundamental type information |
| 446 | directly from the debugging information supplied by the compiler. |
| 447 | fnf@cygnus.com */ |
| 448 | |
| 449 | static struct type * |
| 450 | objc_create_fundamental_type (struct objfile *objfile, int typeid) |
| 451 | { |
| 452 | struct type *type = NULL; |
| 453 | |
| 454 | switch (typeid) |
| 455 | { |
| 456 | default: |
| 457 | /* FIXME: For now, if we are asked to produce a type not in |
| 458 | this language, create the equivalent of a C integer type |
| 459 | with the name "<?type?>". When all the dust settles from |
| 460 | the type reconstruction work, this should probably become |
| 461 | an error. */ |
| 462 | type = init_type (TYPE_CODE_INT, |
| 463 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 464 | 0, "<?type?>", objfile); |
| 465 | warning ("internal error: no C/C++ fundamental type %d", typeid); |
| 466 | break; |
| 467 | case FT_VOID: |
| 468 | type = init_type (TYPE_CODE_VOID, |
| 469 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 470 | 0, "void", objfile); |
| 471 | break; |
| 472 | case FT_CHAR: |
| 473 | type = init_type (TYPE_CODE_INT, |
| 474 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 475 | 0, "char", objfile); |
| 476 | break; |
| 477 | case FT_SIGNED_CHAR: |
| 478 | type = init_type (TYPE_CODE_INT, |
| 479 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 480 | 0, "signed char", objfile); |
| 481 | break; |
| 482 | case FT_UNSIGNED_CHAR: |
| 483 | type = init_type (TYPE_CODE_INT, |
| 484 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 485 | TYPE_FLAG_UNSIGNED, "unsigned char", objfile); |
| 486 | break; |
| 487 | case FT_SHORT: |
| 488 | type = init_type (TYPE_CODE_INT, |
| 489 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 490 | 0, "short", objfile); |
| 491 | break; |
| 492 | case FT_SIGNED_SHORT: |
| 493 | type = init_type (TYPE_CODE_INT, |
| 494 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 495 | 0, "short", objfile); /* FIXME-fnf */ |
| 496 | break; |
| 497 | case FT_UNSIGNED_SHORT: |
| 498 | type = init_type (TYPE_CODE_INT, |
| 499 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 500 | TYPE_FLAG_UNSIGNED, "unsigned short", objfile); |
| 501 | break; |
| 502 | case FT_INTEGER: |
| 503 | type = init_type (TYPE_CODE_INT, |
| 504 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 505 | 0, "int", objfile); |
| 506 | break; |
| 507 | case FT_SIGNED_INTEGER: |
| 508 | type = init_type (TYPE_CODE_INT, |
| 509 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 510 | 0, "int", objfile); /* FIXME -fnf */ |
| 511 | break; |
| 512 | case FT_UNSIGNED_INTEGER: |
| 513 | type = init_type (TYPE_CODE_INT, |
| 514 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 515 | TYPE_FLAG_UNSIGNED, "unsigned int", objfile); |
| 516 | break; |
| 517 | case FT_LONG: |
| 518 | type = init_type (TYPE_CODE_INT, |
| 519 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 520 | 0, "long", objfile); |
| 521 | break; |
| 522 | case FT_SIGNED_LONG: |
| 523 | type = init_type (TYPE_CODE_INT, |
| 524 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 525 | 0, "long", objfile); /* FIXME -fnf */ |
| 526 | break; |
| 527 | case FT_UNSIGNED_LONG: |
| 528 | type = init_type (TYPE_CODE_INT, |
| 529 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 530 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); |
| 531 | break; |
| 532 | case FT_LONG_LONG: |
| 533 | type = init_type (TYPE_CODE_INT, |
| 534 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 535 | 0, "long long", objfile); |
| 536 | break; |
| 537 | case FT_SIGNED_LONG_LONG: |
| 538 | type = init_type (TYPE_CODE_INT, |
| 539 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 540 | 0, "signed long long", objfile); |
| 541 | break; |
| 542 | case FT_UNSIGNED_LONG_LONG: |
| 543 | type = init_type (TYPE_CODE_INT, |
| 544 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 545 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); |
| 546 | break; |
| 547 | case FT_FLOAT: |
| 548 | type = init_type (TYPE_CODE_FLT, |
| 549 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, |
| 550 | 0, "float", objfile); |
| 551 | break; |
| 552 | case FT_DBL_PREC_FLOAT: |
| 553 | type = init_type (TYPE_CODE_FLT, |
| 554 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 555 | 0, "double", objfile); |
| 556 | break; |
| 557 | case FT_EXT_PREC_FLOAT: |
| 558 | type = init_type (TYPE_CODE_FLT, |
| 559 | TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 560 | 0, "long double", objfile); |
| 561 | break; |
| 562 | } |
| 563 | return (type); |
| 564 | } |
| 565 | |
| 566 | /* Determine if we are currently in the Objective-C dispatch function. |
| 567 | If so, get the address of the method function that the dispatcher |
| 568 | would call and use that as the function to step into instead. Also |
| 569 | skip over the trampoline for the function (if any). This is better |
| 570 | for the user since they are only interested in stepping into the |
| 571 | method function anyway. */ |
| 572 | static CORE_ADDR |
| 573 | objc_skip_trampoline (CORE_ADDR stop_pc) |
| 574 | { |
| 575 | CORE_ADDR real_stop_pc; |
| 576 | CORE_ADDR method_stop_pc; |
| 577 | |
| 578 | real_stop_pc = SKIP_TRAMPOLINE_CODE (stop_pc); |
| 579 | |
| 580 | if (real_stop_pc != 0) |
| 581 | find_objc_msgcall (real_stop_pc, &method_stop_pc); |
| 582 | else |
| 583 | find_objc_msgcall (stop_pc, &method_stop_pc); |
| 584 | |
| 585 | if (method_stop_pc) |
| 586 | { |
| 587 | real_stop_pc = SKIP_TRAMPOLINE_CODE (method_stop_pc); |
| 588 | if (real_stop_pc == 0) |
| 589 | real_stop_pc = method_stop_pc; |
| 590 | } |
| 591 | |
| 592 | return real_stop_pc; |
| 593 | } |
| 594 | |
| 595 | |
| 596 | /* Table mapping opcodes into strings for printing operators |
| 597 | and precedences of the operators. */ |
| 598 | |
| 599 | static const struct op_print objc_op_print_tab[] = |
| 600 | { |
| 601 | {",", BINOP_COMMA, PREC_COMMA, 0}, |
| 602 | {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
| 603 | {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, |
| 604 | {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
| 605 | {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, |
| 606 | {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, |
| 607 | {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, |
| 608 | {"==", BINOP_EQUAL, PREC_EQUAL, 0}, |
| 609 | {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, |
| 610 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, |
| 611 | {">=", BINOP_GEQ, PREC_ORDER, 0}, |
| 612 | {">", BINOP_GTR, PREC_ORDER, 0}, |
| 613 | {"<", BINOP_LESS, PREC_ORDER, 0}, |
| 614 | {">>", BINOP_RSH, PREC_SHIFT, 0}, |
| 615 | {"<<", BINOP_LSH, PREC_SHIFT, 0}, |
| 616 | {"+", BINOP_ADD, PREC_ADD, 0}, |
| 617 | {"-", BINOP_SUB, PREC_ADD, 0}, |
| 618 | {"*", BINOP_MUL, PREC_MUL, 0}, |
| 619 | {"/", BINOP_DIV, PREC_MUL, 0}, |
| 620 | {"%", BINOP_REM, PREC_MUL, 0}, |
| 621 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, |
| 622 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
| 623 | {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, |
| 624 | {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, |
| 625 | {"*", UNOP_IND, PREC_PREFIX, 0}, |
| 626 | {"&", UNOP_ADDR, PREC_PREFIX, 0}, |
| 627 | {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0}, |
| 628 | {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, |
| 629 | {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, |
| 630 | {NULL, OP_NULL, PREC_NULL, 0} |
| 631 | }; |
| 632 | |
| 633 | struct type ** const (objc_builtin_types[]) = |
| 634 | { |
| 635 | &builtin_type_int, |
| 636 | &builtin_type_long, |
| 637 | &builtin_type_short, |
| 638 | &builtin_type_char, |
| 639 | &builtin_type_float, |
| 640 | &builtin_type_double, |
| 641 | &builtin_type_void, |
| 642 | &builtin_type_long_long, |
| 643 | &builtin_type_signed_char, |
| 644 | &builtin_type_unsigned_char, |
| 645 | &builtin_type_unsigned_short, |
| 646 | &builtin_type_unsigned_int, |
| 647 | &builtin_type_unsigned_long, |
| 648 | &builtin_type_unsigned_long_long, |
| 649 | &builtin_type_long_double, |
| 650 | &builtin_type_complex, |
| 651 | &builtin_type_double_complex, |
| 652 | 0 |
| 653 | }; |
| 654 | |
| 655 | const struct language_defn objc_language_defn = { |
| 656 | "objective-c", /* Language name */ |
| 657 | language_objc, |
| 658 | objc_builtin_types, |
| 659 | range_check_off, |
| 660 | type_check_off, |
| 661 | case_sensitive_on, |
| 662 | array_row_major, |
| 663 | &exp_descriptor_standard, |
| 664 | objc_parse, |
| 665 | objc_error, |
| 666 | null_post_parser, |
| 667 | objc_printchar, /* Print a character constant */ |
| 668 | objc_printstr, /* Function to print string constant */ |
| 669 | objc_emit_char, |
| 670 | objc_create_fundamental_type, /* Create fundamental type in this language */ |
| 671 | c_print_type, /* Print a type using appropriate syntax */ |
| 672 | c_val_print, /* Print a value using appropriate syntax */ |
| 673 | c_value_print, /* Print a top-level value */ |
| 674 | objc_skip_trampoline, /* Language specific skip_trampoline */ |
| 675 | value_of_this, /* value_of_this */ |
| 676 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 677 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 678 | objc_demangle, /* Language specific symbol demangler */ |
| 679 | NULL, /* Language specific class_name_from_physname */ |
| 680 | {"", "", "", ""}, /* Binary format info */ |
| 681 | {"0%lo", "0", "o", ""}, /* Octal format info */ |
| 682 | {"%ld", "", "d", ""}, /* Decimal format info */ |
| 683 | {"0x%lx", "0x", "x", ""}, /* Hex format info */ |
| 684 | objc_op_print_tab, /* Expression operators for printing */ |
| 685 | 1, /* C-style arrays */ |
| 686 | 0, /* String lower bound */ |
| 687 | &builtin_type_char, /* Type of string elements */ |
| 688 | default_word_break_characters, |
| 689 | NULL, /* FIXME: la_language_arch_info. */ |
| 690 | LANG_MAGIC |
| 691 | }; |
| 692 | |
| 693 | /* |
| 694 | * ObjC: |
| 695 | * Following functions help construct Objective-C message calls |
| 696 | */ |
| 697 | |
| 698 | struct selname /* For parsing Objective-C. */ |
| 699 | { |
| 700 | struct selname *next; |
| 701 | char *msglist_sel; |
| 702 | int msglist_len; |
| 703 | }; |
| 704 | |
| 705 | static int msglist_len; |
| 706 | static struct selname *selname_chain; |
| 707 | static char *msglist_sel; |
| 708 | |
| 709 | void |
| 710 | start_msglist(void) |
| 711 | { |
| 712 | struct selname *new = |
| 713 | (struct selname *) xmalloc (sizeof (struct selname)); |
| 714 | |
| 715 | new->next = selname_chain; |
| 716 | new->msglist_len = msglist_len; |
| 717 | new->msglist_sel = msglist_sel; |
| 718 | msglist_len = 0; |
| 719 | msglist_sel = (char *)xmalloc(1); |
| 720 | *msglist_sel = 0; |
| 721 | selname_chain = new; |
| 722 | } |
| 723 | |
| 724 | void |
| 725 | add_msglist(struct stoken *str, int addcolon) |
| 726 | { |
| 727 | char *s, *p; |
| 728 | int len, plen; |
| 729 | |
| 730 | if (str == 0) { /* Unnamed arg, or... */ |
| 731 | if (addcolon == 0) { /* variable number of args. */ |
| 732 | msglist_len++; |
| 733 | return; |
| 734 | } |
| 735 | p = ""; |
| 736 | plen = 0; |
| 737 | } else { |
| 738 | p = str->ptr; |
| 739 | plen = str->length; |
| 740 | } |
| 741 | len = plen + strlen(msglist_sel) + 2; |
| 742 | s = (char *)xmalloc(len); |
| 743 | strcpy(s, msglist_sel); |
| 744 | strncat(s, p, plen); |
| 745 | xfree(msglist_sel); |
| 746 | msglist_sel = s; |
| 747 | if (addcolon) { |
| 748 | s[len-2] = ':'; |
| 749 | s[len-1] = 0; |
| 750 | msglist_len++; |
| 751 | } else |
| 752 | s[len-2] = '\0'; |
| 753 | } |
| 754 | |
| 755 | int |
| 756 | end_msglist(void) |
| 757 | { |
| 758 | int val = msglist_len; |
| 759 | struct selname *sel = selname_chain; |
| 760 | char *p = msglist_sel; |
| 761 | CORE_ADDR selid; |
| 762 | |
| 763 | selname_chain = sel->next; |
| 764 | msglist_len = sel->msglist_len; |
| 765 | msglist_sel = sel->msglist_sel; |
| 766 | selid = lookup_child_selector(p); |
| 767 | if (!selid) |
| 768 | error("Can't find selector \"%s\"", p); |
| 769 | write_exp_elt_longcst (selid); |
| 770 | xfree(p); |
| 771 | write_exp_elt_longcst (val); /* Number of args */ |
| 772 | xfree(sel); |
| 773 | |
| 774 | return val; |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Function: specialcmp (char *a, char *b) |
| 779 | * |
| 780 | * Special strcmp: treats ']' and ' ' as end-of-string. |
| 781 | * Used for qsorting lists of objc methods (either by class or selector). |
| 782 | */ |
| 783 | |
| 784 | static int |
| 785 | specialcmp (char *a, char *b) |
| 786 | { |
| 787 | while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']') |
| 788 | { |
| 789 | if (*a != *b) |
| 790 | return *a - *b; |
| 791 | a++, b++; |
| 792 | } |
| 793 | if (*a && *a != ' ' && *a != ']') |
| 794 | return 1; /* a is longer therefore greater */ |
| 795 | if (*b && *b != ' ' && *b != ']') |
| 796 | return -1; /* a is shorter therefore lesser */ |
| 797 | return 0; /* a and b are identical */ |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * Function: compare_selectors (const void *, const void *) |
| 802 | * |
| 803 | * Comparison function for use with qsort. Arguments are symbols or |
| 804 | * msymbols Compares selector part of objc method name alphabetically. |
| 805 | */ |
| 806 | |
| 807 | static int |
| 808 | compare_selectors (const void *a, const void *b) |
| 809 | { |
| 810 | char *aname, *bname; |
| 811 | |
| 812 | aname = SYMBOL_PRINT_NAME (*(struct symbol **) a); |
| 813 | bname = SYMBOL_PRINT_NAME (*(struct symbol **) b); |
| 814 | if (aname == NULL || bname == NULL) |
| 815 | error ("internal: compare_selectors(1)"); |
| 816 | |
| 817 | aname = strchr(aname, ' '); |
| 818 | bname = strchr(bname, ' '); |
| 819 | if (aname == NULL || bname == NULL) |
| 820 | error ("internal: compare_selectors(2)"); |
| 821 | |
| 822 | return specialcmp (aname+1, bname+1); |
| 823 | } |
| 824 | |
| 825 | /* |
| 826 | * Function: selectors_info (regexp, from_tty) |
| 827 | * |
| 828 | * Implements the "Info selectors" command. Takes an optional regexp |
| 829 | * arg. Lists all objective c selectors that match the regexp. Works |
| 830 | * by grepping thru all symbols for objective c methods. Output list |
| 831 | * is sorted and uniqued. |
| 832 | */ |
| 833 | |
| 834 | static void |
| 835 | selectors_info (char *regexp, int from_tty) |
| 836 | { |
| 837 | struct objfile *objfile; |
| 838 | struct minimal_symbol *msymbol; |
| 839 | char *name; |
| 840 | char *val; |
| 841 | int matches = 0; |
| 842 | int maxlen = 0; |
| 843 | int ix; |
| 844 | char myregexp[2048]; |
| 845 | char asel[256]; |
| 846 | struct symbol **sym_arr; |
| 847 | int plusminus = 0; |
| 848 | |
| 849 | if (regexp == NULL) |
| 850 | strcpy(myregexp, ".*]"); /* Null input, match all objc methods. */ |
| 851 | else |
| 852 | { |
| 853 | if (*regexp == '+' || *regexp == '-') |
| 854 | { /* User wants only class methods or only instance methods. */ |
| 855 | plusminus = *regexp++; |
| 856 | while (*regexp == ' ' || *regexp == '\t') |
| 857 | regexp++; |
| 858 | } |
| 859 | if (*regexp == '\0') |
| 860 | strcpy(myregexp, ".*]"); |
| 861 | else |
| 862 | { |
| 863 | strcpy(myregexp, regexp); |
| 864 | if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */ |
| 865 | myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */ |
| 866 | else |
| 867 | strcat(myregexp, ".*]"); |
| 868 | } |
| 869 | } |
| 870 | |
| 871 | if (regexp != NULL) |
| 872 | { |
| 873 | val = re_comp (myregexp); |
| 874 | if (val != 0) |
| 875 | error ("Invalid regexp (%s): %s", val, regexp); |
| 876 | } |
| 877 | |
| 878 | /* First time thru is JUST to get max length and count. */ |
| 879 | ALL_MSYMBOLS (objfile, msymbol) |
| 880 | { |
| 881 | QUIT; |
| 882 | name = SYMBOL_NATURAL_NAME (msymbol); |
| 883 | if (name && |
| 884 | (name[0] == '-' || name[0] == '+') && |
| 885 | name[1] == '[') /* Got a method name. */ |
| 886 | { |
| 887 | /* Filter for class/instance methods. */ |
| 888 | if (plusminus && name[0] != plusminus) |
| 889 | continue; |
| 890 | /* Find selector part. */ |
| 891 | name = (char *) strchr(name+2, ' '); |
| 892 | if (regexp == NULL || re_exec(++name) != 0) |
| 893 | { |
| 894 | char *mystart = name; |
| 895 | char *myend = (char *) strchr(mystart, ']'); |
| 896 | |
| 897 | if (myend && (myend - mystart > maxlen)) |
| 898 | maxlen = myend - mystart; /* Get longest selector. */ |
| 899 | matches++; |
| 900 | } |
| 901 | } |
| 902 | } |
| 903 | if (matches) |
| 904 | { |
| 905 | printf_filtered ("Selectors matching \"%s\":\n\n", |
| 906 | regexp ? regexp : "*"); |
| 907 | |
| 908 | sym_arr = alloca (matches * sizeof (struct symbol *)); |
| 909 | matches = 0; |
| 910 | ALL_MSYMBOLS (objfile, msymbol) |
| 911 | { |
| 912 | QUIT; |
| 913 | name = SYMBOL_NATURAL_NAME (msymbol); |
| 914 | if (name && |
| 915 | (name[0] == '-' || name[0] == '+') && |
| 916 | name[1] == '[') /* Got a method name. */ |
| 917 | { |
| 918 | /* Filter for class/instance methods. */ |
| 919 | if (plusminus && name[0] != plusminus) |
| 920 | continue; |
| 921 | /* Find selector part. */ |
| 922 | name = (char *) strchr(name+2, ' '); |
| 923 | if (regexp == NULL || re_exec(++name) != 0) |
| 924 | sym_arr[matches++] = (struct symbol *) msymbol; |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | qsort (sym_arr, matches, sizeof (struct minimal_symbol *), |
| 929 | compare_selectors); |
| 930 | /* Prevent compare on first iteration. */ |
| 931 | asel[0] = 0; |
| 932 | for (ix = 0; ix < matches; ix++) /* Now do the output. */ |
| 933 | { |
| 934 | char *p = asel; |
| 935 | |
| 936 | QUIT; |
| 937 | name = SYMBOL_NATURAL_NAME (sym_arr[ix]); |
| 938 | name = strchr (name, ' ') + 1; |
| 939 | if (p[0] && specialcmp(name, p) == 0) |
| 940 | continue; /* Seen this one already (not unique). */ |
| 941 | |
| 942 | /* Copy selector part. */ |
| 943 | while (*name && *name != ']') |
| 944 | *p++ = *name++; |
| 945 | *p++ = '\0'; |
| 946 | /* Print in columns. */ |
| 947 | puts_filtered_tabular(asel, maxlen + 1, 0); |
| 948 | } |
| 949 | begin_line(); |
| 950 | } |
| 951 | else |
| 952 | printf_filtered ("No selectors matching \"%s\"\n", regexp ? regexp : "*"); |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * Function: compare_classes (const void *, const void *) |
| 957 | * |
| 958 | * Comparison function for use with qsort. Arguments are symbols or |
| 959 | * msymbols Compares class part of objc method name alphabetically. |
| 960 | */ |
| 961 | |
| 962 | static int |
| 963 | compare_classes (const void *a, const void *b) |
| 964 | { |
| 965 | char *aname, *bname; |
| 966 | |
| 967 | aname = SYMBOL_PRINT_NAME (*(struct symbol **) a); |
| 968 | bname = SYMBOL_PRINT_NAME (*(struct symbol **) b); |
| 969 | if (aname == NULL || bname == NULL) |
| 970 | error ("internal: compare_classes(1)"); |
| 971 | |
| 972 | return specialcmp (aname+1, bname+1); |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * Function: classes_info(regexp, from_tty) |
| 977 | * |
| 978 | * Implements the "info classes" command for objective c classes. |
| 979 | * Lists all objective c classes that match the optional regexp. |
| 980 | * Works by grepping thru the list of objective c methods. List will |
| 981 | * be sorted and uniqued (since one class may have many methods). |
| 982 | * BUGS: will not list a class that has no methods. |
| 983 | */ |
| 984 | |
| 985 | static void |
| 986 | classes_info (char *regexp, int from_tty) |
| 987 | { |
| 988 | struct objfile *objfile; |
| 989 | struct minimal_symbol *msymbol; |
| 990 | char *name; |
| 991 | char *val; |
| 992 | int matches = 0; |
| 993 | int maxlen = 0; |
| 994 | int ix; |
| 995 | char myregexp[2048]; |
| 996 | char aclass[256]; |
| 997 | struct symbol **sym_arr; |
| 998 | |
| 999 | if (regexp == NULL) |
| 1000 | strcpy(myregexp, ".* "); /* Null input: match all objc classes. */ |
| 1001 | else |
| 1002 | { |
| 1003 | strcpy(myregexp, regexp); |
| 1004 | if (myregexp[strlen(myregexp) - 1] == '$') |
| 1005 | /* In the method name, the end of the class name is marked by ' '. */ |
| 1006 | myregexp[strlen(myregexp) - 1] = ' '; |
| 1007 | else |
| 1008 | strcat(myregexp, ".* "); |
| 1009 | } |
| 1010 | |
| 1011 | if (regexp != NULL) |
| 1012 | { |
| 1013 | val = re_comp (myregexp); |
| 1014 | if (val != 0) |
| 1015 | error ("Invalid regexp (%s): %s", val, regexp); |
| 1016 | } |
| 1017 | |
| 1018 | /* First time thru is JUST to get max length and count. */ |
| 1019 | ALL_MSYMBOLS (objfile, msymbol) |
| 1020 | { |
| 1021 | QUIT; |
| 1022 | name = SYMBOL_NATURAL_NAME (msymbol); |
| 1023 | if (name && |
| 1024 | (name[0] == '-' || name[0] == '+') && |
| 1025 | name[1] == '[') /* Got a method name. */ |
| 1026 | if (regexp == NULL || re_exec(name+2) != 0) |
| 1027 | { |
| 1028 | /* Compute length of classname part. */ |
| 1029 | char *mystart = name + 2; |
| 1030 | char *myend = (char *) strchr(mystart, ' '); |
| 1031 | |
| 1032 | if (myend && (myend - mystart > maxlen)) |
| 1033 | maxlen = myend - mystart; |
| 1034 | matches++; |
| 1035 | } |
| 1036 | } |
| 1037 | if (matches) |
| 1038 | { |
| 1039 | printf_filtered ("Classes matching \"%s\":\n\n", |
| 1040 | regexp ? regexp : "*"); |
| 1041 | sym_arr = alloca (matches * sizeof (struct symbol *)); |
| 1042 | matches = 0; |
| 1043 | ALL_MSYMBOLS (objfile, msymbol) |
| 1044 | { |
| 1045 | QUIT; |
| 1046 | name = SYMBOL_NATURAL_NAME (msymbol); |
| 1047 | if (name && |
| 1048 | (name[0] == '-' || name[0] == '+') && |
| 1049 | name[1] == '[') /* Got a method name. */ |
| 1050 | if (regexp == NULL || re_exec(name+2) != 0) |
| 1051 | sym_arr[matches++] = (struct symbol *) msymbol; |
| 1052 | } |
| 1053 | |
| 1054 | qsort (sym_arr, matches, sizeof (struct minimal_symbol *), |
| 1055 | compare_classes); |
| 1056 | /* Prevent compare on first iteration. */ |
| 1057 | aclass[0] = 0; |
| 1058 | for (ix = 0; ix < matches; ix++) /* Now do the output. */ |
| 1059 | { |
| 1060 | char *p = aclass; |
| 1061 | |
| 1062 | QUIT; |
| 1063 | name = SYMBOL_NATURAL_NAME (sym_arr[ix]); |
| 1064 | name += 2; |
| 1065 | if (p[0] && specialcmp(name, p) == 0) |
| 1066 | continue; /* Seen this one already (not unique). */ |
| 1067 | |
| 1068 | /* Copy class part of method name. */ |
| 1069 | while (*name && *name != ' ') |
| 1070 | *p++ = *name++; |
| 1071 | *p++ = '\0'; |
| 1072 | /* Print in columns. */ |
| 1073 | puts_filtered_tabular(aclass, maxlen + 1, 0); |
| 1074 | } |
| 1075 | begin_line(); |
| 1076 | } |
| 1077 | else |
| 1078 | printf_filtered ("No classes matching \"%s\"\n", regexp ? regexp : "*"); |
| 1079 | } |
| 1080 | |
| 1081 | /* |
| 1082 | * Function: find_imps (char *selector, struct symbol **sym_arr) |
| 1083 | * |
| 1084 | * Input: a string representing a selector |
| 1085 | * a pointer to an array of symbol pointers |
| 1086 | * possibly a pointer to a symbol found by the caller. |
| 1087 | * |
| 1088 | * Output: number of methods that implement that selector. Side |
| 1089 | * effects: The array of symbol pointers is filled with matching syms. |
| 1090 | * |
| 1091 | * By analogy with function "find_methods" (symtab.c), builds a list |
| 1092 | * of symbols matching the ambiguous input, so that "decode_line_2" |
| 1093 | * (symtab.c) can list them and ask the user to choose one or more. |
| 1094 | * In this case the matches are objective c methods |
| 1095 | * ("implementations") matching an objective c selector. |
| 1096 | * |
| 1097 | * Note that it is possible for a normal (c-style) function to have |
| 1098 | * the same name as an objective c selector. To prevent the selector |
| 1099 | * from eclipsing the function, we allow the caller (decode_line_1) to |
| 1100 | * search for such a function first, and if it finds one, pass it in |
| 1101 | * to us. We will then integrate it into the list. We also search |
| 1102 | * for one here, among the minsyms. |
| 1103 | * |
| 1104 | * NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be divided |
| 1105 | * into two parts: debuggable (struct symbol) syms, and |
| 1106 | * non_debuggable (struct minimal_symbol) syms. The debuggable |
| 1107 | * ones will come first, before NUM_DEBUGGABLE (which will thus |
| 1108 | * be the index of the first non-debuggable one). |
| 1109 | */ |
| 1110 | |
| 1111 | /* |
| 1112 | * Function: total_number_of_imps (char *selector); |
| 1113 | * |
| 1114 | * Input: a string representing a selector |
| 1115 | * Output: number of methods that implement that selector. |
| 1116 | * |
| 1117 | * By analogy with function "total_number_of_methods", this allows |
| 1118 | * decode_line_1 (symtab.c) to detect if there are objective c methods |
| 1119 | * matching the input, and to allocate an array of pointers to them |
| 1120 | * which can be manipulated by "decode_line_2" (also in symtab.c). |
| 1121 | */ |
| 1122 | |
| 1123 | char * |
| 1124 | parse_selector (char *method, char **selector) |
| 1125 | { |
| 1126 | char *s1 = NULL; |
| 1127 | char *s2 = NULL; |
| 1128 | int found_quote = 0; |
| 1129 | |
| 1130 | char *nselector = NULL; |
| 1131 | |
| 1132 | gdb_assert (selector != NULL); |
| 1133 | |
| 1134 | s1 = method; |
| 1135 | |
| 1136 | while (isspace (*s1)) |
| 1137 | s1++; |
| 1138 | if (*s1 == '\'') |
| 1139 | { |
| 1140 | found_quote = 1; |
| 1141 | s1++; |
| 1142 | } |
| 1143 | while (isspace (*s1)) |
| 1144 | s1++; |
| 1145 | |
| 1146 | nselector = s1; |
| 1147 | s2 = s1; |
| 1148 | |
| 1149 | for (;;) { |
| 1150 | if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':')) |
| 1151 | *s1++ = *s2; |
| 1152 | else if (isspace (*s2)) |
| 1153 | ; |
| 1154 | else if ((*s2 == '\0') || (*s2 == '\'')) |
| 1155 | break; |
| 1156 | else |
| 1157 | return NULL; |
| 1158 | s2++; |
| 1159 | } |
| 1160 | *s1++ = '\0'; |
| 1161 | |
| 1162 | while (isspace (*s2)) |
| 1163 | s2++; |
| 1164 | if (found_quote) |
| 1165 | { |
| 1166 | if (*s2 == '\'') |
| 1167 | s2++; |
| 1168 | while (isspace (*s2)) |
| 1169 | s2++; |
| 1170 | } |
| 1171 | |
| 1172 | if (selector != NULL) |
| 1173 | *selector = nselector; |
| 1174 | |
| 1175 | return s2; |
| 1176 | } |
| 1177 | |
| 1178 | char * |
| 1179 | parse_method (char *method, char *type, char **class, |
| 1180 | char **category, char **selector) |
| 1181 | { |
| 1182 | char *s1 = NULL; |
| 1183 | char *s2 = NULL; |
| 1184 | int found_quote = 0; |
| 1185 | |
| 1186 | char ntype = '\0'; |
| 1187 | char *nclass = NULL; |
| 1188 | char *ncategory = NULL; |
| 1189 | char *nselector = NULL; |
| 1190 | |
| 1191 | gdb_assert (type != NULL); |
| 1192 | gdb_assert (class != NULL); |
| 1193 | gdb_assert (category != NULL); |
| 1194 | gdb_assert (selector != NULL); |
| 1195 | |
| 1196 | s1 = method; |
| 1197 | |
| 1198 | while (isspace (*s1)) |
| 1199 | s1++; |
| 1200 | if (*s1 == '\'') |
| 1201 | { |
| 1202 | found_quote = 1; |
| 1203 | s1++; |
| 1204 | } |
| 1205 | while (isspace (*s1)) |
| 1206 | s1++; |
| 1207 | |
| 1208 | if ((s1[0] == '+') || (s1[0] == '-')) |
| 1209 | ntype = *s1++; |
| 1210 | |
| 1211 | while (isspace (*s1)) |
| 1212 | s1++; |
| 1213 | |
| 1214 | if (*s1 != '[') |
| 1215 | return NULL; |
| 1216 | s1++; |
| 1217 | |
| 1218 | nclass = s1; |
| 1219 | while (isalnum (*s1) || (*s1 == '_')) |
| 1220 | s1++; |
| 1221 | |
| 1222 | s2 = s1; |
| 1223 | while (isspace (*s2)) |
| 1224 | s2++; |
| 1225 | |
| 1226 | if (*s2 == '(') |
| 1227 | { |
| 1228 | s2++; |
| 1229 | while (isspace (*s2)) |
| 1230 | s2++; |
| 1231 | ncategory = s2; |
| 1232 | while (isalnum (*s2) || (*s2 == '_')) |
| 1233 | s2++; |
| 1234 | *s2++ = '\0'; |
| 1235 | } |
| 1236 | |
| 1237 | /* Truncate the class name now that we're not using the open paren. */ |
| 1238 | *s1++ = '\0'; |
| 1239 | |
| 1240 | nselector = s2; |
| 1241 | s1 = s2; |
| 1242 | |
| 1243 | for (;;) { |
| 1244 | if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':')) |
| 1245 | *s1++ = *s2; |
| 1246 | else if (isspace (*s2)) |
| 1247 | ; |
| 1248 | else if (*s2 == ']') |
| 1249 | break; |
| 1250 | else |
| 1251 | return NULL; |
| 1252 | s2++; |
| 1253 | } |
| 1254 | *s1++ = '\0'; |
| 1255 | s2++; |
| 1256 | |
| 1257 | while (isspace (*s2)) |
| 1258 | s2++; |
| 1259 | if (found_quote) |
| 1260 | { |
| 1261 | if (*s2 != '\'') |
| 1262 | return NULL; |
| 1263 | s2++; |
| 1264 | while (isspace (*s2)) |
| 1265 | s2++; |
| 1266 | } |
| 1267 | |
| 1268 | if (type != NULL) |
| 1269 | *type = ntype; |
| 1270 | if (class != NULL) |
| 1271 | *class = nclass; |
| 1272 | if (category != NULL) |
| 1273 | *category = ncategory; |
| 1274 | if (selector != NULL) |
| 1275 | *selector = nselector; |
| 1276 | |
| 1277 | return s2; |
| 1278 | } |
| 1279 | |
| 1280 | static void |
| 1281 | find_methods (struct symtab *symtab, char type, |
| 1282 | const char *class, const char *category, |
| 1283 | const char *selector, struct symbol **syms, |
| 1284 | unsigned int *nsym, unsigned int *ndebug) |
| 1285 | { |
| 1286 | struct objfile *objfile = NULL; |
| 1287 | struct minimal_symbol *msymbol = NULL; |
| 1288 | struct block *block = NULL; |
| 1289 | struct symbol *sym = NULL; |
| 1290 | |
| 1291 | char *symname = NULL; |
| 1292 | |
| 1293 | char ntype = '\0'; |
| 1294 | char *nclass = NULL; |
| 1295 | char *ncategory = NULL; |
| 1296 | char *nselector = NULL; |
| 1297 | |
| 1298 | unsigned int csym = 0; |
| 1299 | unsigned int cdebug = 0; |
| 1300 | |
| 1301 | static char *tmp = NULL; |
| 1302 | static unsigned int tmplen = 0; |
| 1303 | |
| 1304 | gdb_assert (nsym != NULL); |
| 1305 | gdb_assert (ndebug != NULL); |
| 1306 | |
| 1307 | if (symtab) |
| 1308 | block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK); |
| 1309 | |
| 1310 | ALL_MSYMBOLS (objfile, msymbol) |
| 1311 | { |
| 1312 | QUIT; |
| 1313 | |
| 1314 | if ((msymbol->type != mst_text) && (msymbol->type != mst_file_text)) |
| 1315 | /* Not a function or method. */ |
| 1316 | continue; |
| 1317 | |
| 1318 | if (symtab) |
| 1319 | if ((SYMBOL_VALUE_ADDRESS (msymbol) < BLOCK_START (block)) || |
| 1320 | (SYMBOL_VALUE_ADDRESS (msymbol) >= BLOCK_END (block))) |
| 1321 | /* Not in the specified symtab. */ |
| 1322 | continue; |
| 1323 | |
| 1324 | symname = SYMBOL_NATURAL_NAME (msymbol); |
| 1325 | if (symname == NULL) |
| 1326 | continue; |
| 1327 | |
| 1328 | if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '[')) |
| 1329 | /* Not a method name. */ |
| 1330 | continue; |
| 1331 | |
| 1332 | while ((strlen (symname) + 1) >= tmplen) |
| 1333 | { |
| 1334 | tmplen = (tmplen == 0) ? 1024 : tmplen * 2; |
| 1335 | tmp = xrealloc (tmp, tmplen); |
| 1336 | } |
| 1337 | strcpy (tmp, symname); |
| 1338 | |
| 1339 | if (parse_method (tmp, &ntype, &nclass, &ncategory, &nselector) == NULL) |
| 1340 | continue; |
| 1341 | |
| 1342 | if ((type != '\0') && (ntype != type)) |
| 1343 | continue; |
| 1344 | |
| 1345 | if ((class != NULL) |
| 1346 | && ((nclass == NULL) || (strcmp (class, nclass) != 0))) |
| 1347 | continue; |
| 1348 | |
| 1349 | if ((category != NULL) && |
| 1350 | ((ncategory == NULL) || (strcmp (category, ncategory) != 0))) |
| 1351 | continue; |
| 1352 | |
| 1353 | if ((selector != NULL) && |
| 1354 | ((nselector == NULL) || (strcmp (selector, nselector) != 0))) |
| 1355 | continue; |
| 1356 | |
| 1357 | sym = find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol)); |
| 1358 | if (sym != NULL) |
| 1359 | { |
| 1360 | const char *newsymname = SYMBOL_NATURAL_NAME (sym); |
| 1361 | |
| 1362 | if (strcmp (symname, newsymname) == 0) |
| 1363 | { |
| 1364 | /* Found a high-level method sym: swap it into the |
| 1365 | lower part of sym_arr (below num_debuggable). */ |
| 1366 | if (syms != NULL) |
| 1367 | { |
| 1368 | syms[csym] = syms[cdebug]; |
| 1369 | syms[cdebug] = sym; |
| 1370 | } |
| 1371 | csym++; |
| 1372 | cdebug++; |
| 1373 | } |
| 1374 | else |
| 1375 | { |
| 1376 | warning ( |
| 1377 | "debugging symbol \"%s\" does not match minimal symbol (\"%s\"); ignoring", |
| 1378 | newsymname, symname); |
| 1379 | if (syms != NULL) |
| 1380 | syms[csym] = (struct symbol *) msymbol; |
| 1381 | csym++; |
| 1382 | } |
| 1383 | } |
| 1384 | else |
| 1385 | { |
| 1386 | /* Found a non-debuggable method symbol. */ |
| 1387 | if (syms != NULL) |
| 1388 | syms[csym] = (struct symbol *) msymbol; |
| 1389 | csym++; |
| 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | if (nsym != NULL) |
| 1394 | *nsym = csym; |
| 1395 | if (ndebug != NULL) |
| 1396 | *ndebug = cdebug; |
| 1397 | } |
| 1398 | |
| 1399 | char *find_imps (struct symtab *symtab, struct block *block, |
| 1400 | char *method, struct symbol **syms, |
| 1401 | unsigned int *nsym, unsigned int *ndebug) |
| 1402 | { |
| 1403 | char type = '\0'; |
| 1404 | char *class = NULL; |
| 1405 | char *category = NULL; |
| 1406 | char *selector = NULL; |
| 1407 | |
| 1408 | unsigned int csym = 0; |
| 1409 | unsigned int cdebug = 0; |
| 1410 | |
| 1411 | unsigned int ncsym = 0; |
| 1412 | unsigned int ncdebug = 0; |
| 1413 | |
| 1414 | char *buf = NULL; |
| 1415 | char *tmp = NULL; |
| 1416 | |
| 1417 | gdb_assert (nsym != NULL); |
| 1418 | gdb_assert (ndebug != NULL); |
| 1419 | |
| 1420 | if (nsym != NULL) |
| 1421 | *nsym = 0; |
| 1422 | if (ndebug != NULL) |
| 1423 | *ndebug = 0; |
| 1424 | |
| 1425 | buf = (char *) alloca (strlen (method) + 1); |
| 1426 | strcpy (buf, method); |
| 1427 | tmp = parse_method (buf, &type, &class, &category, &selector); |
| 1428 | |
| 1429 | if (tmp == NULL) { |
| 1430 | |
| 1431 | struct symbol *sym = NULL; |
| 1432 | struct minimal_symbol *msym = NULL; |
| 1433 | |
| 1434 | strcpy (buf, method); |
| 1435 | tmp = parse_selector (buf, &selector); |
| 1436 | |
| 1437 | if (tmp == NULL) |
| 1438 | return NULL; |
| 1439 | |
| 1440 | sym = lookup_symbol (selector, block, VAR_DOMAIN, 0, NULL); |
| 1441 | if (sym != NULL) |
| 1442 | { |
| 1443 | if (syms) |
| 1444 | syms[csym] = sym; |
| 1445 | csym++; |
| 1446 | cdebug++; |
| 1447 | } |
| 1448 | |
| 1449 | if (sym == NULL) |
| 1450 | msym = lookup_minimal_symbol (selector, 0, 0); |
| 1451 | |
| 1452 | if (msym != NULL) |
| 1453 | { |
| 1454 | if (syms) |
| 1455 | syms[csym] = (struct symbol *)msym; |
| 1456 | csym++; |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | if (syms != NULL) |
| 1461 | find_methods (symtab, type, class, category, selector, |
| 1462 | syms + csym, &ncsym, &ncdebug); |
| 1463 | else |
| 1464 | find_methods (symtab, type, class, category, selector, |
| 1465 | NULL, &ncsym, &ncdebug); |
| 1466 | |
| 1467 | /* If we didn't find any methods, just return. */ |
| 1468 | if (ncsym == 0 && ncdebug == 0) |
| 1469 | return method; |
| 1470 | |
| 1471 | /* Take debug symbols from the second batch of symbols and swap them |
| 1472 | * with debug symbols from the first batch. Repeat until either the |
| 1473 | * second section is out of debug symbols or the first section is |
| 1474 | * full of debug symbols. Either way we have all debug symbols |
| 1475 | * packed to the beginning of the buffer. |
| 1476 | */ |
| 1477 | |
| 1478 | if (syms != NULL) |
| 1479 | { |
| 1480 | while ((cdebug < csym) && (ncdebug > 0)) |
| 1481 | { |
| 1482 | struct symbol *s = NULL; |
| 1483 | /* First non-debugging symbol. */ |
| 1484 | unsigned int i = cdebug; |
| 1485 | /* Last of second batch of debug symbols. */ |
| 1486 | unsigned int j = csym + ncdebug - 1; |
| 1487 | |
| 1488 | s = syms[j]; |
| 1489 | syms[j] = syms[i]; |
| 1490 | syms[i] = s; |
| 1491 | |
| 1492 | /* We've moved a symbol from the second debug section to the |
| 1493 | first one. */ |
| 1494 | cdebug++; |
| 1495 | ncdebug--; |
| 1496 | } |
| 1497 | } |
| 1498 | |
| 1499 | csym += ncsym; |
| 1500 | cdebug += ncdebug; |
| 1501 | |
| 1502 | if (nsym != NULL) |
| 1503 | *nsym = csym; |
| 1504 | if (ndebug != NULL) |
| 1505 | *ndebug = cdebug; |
| 1506 | |
| 1507 | if (syms == NULL) |
| 1508 | return method + (tmp - buf); |
| 1509 | |
| 1510 | if (csym > 1) |
| 1511 | { |
| 1512 | /* Sort debuggable symbols. */ |
| 1513 | if (cdebug > 1) |
| 1514 | qsort (syms, cdebug, sizeof (struct minimal_symbol *), |
| 1515 | compare_classes); |
| 1516 | |
| 1517 | /* Sort minimal_symbols. */ |
| 1518 | if ((csym - cdebug) > 1) |
| 1519 | qsort (&syms[cdebug], csym - cdebug, |
| 1520 | sizeof (struct minimal_symbol *), compare_classes); |
| 1521 | } |
| 1522 | /* Terminate the sym_arr list. */ |
| 1523 | syms[csym] = 0; |
| 1524 | |
| 1525 | return method + (tmp - buf); |
| 1526 | } |
| 1527 | |
| 1528 | static void |
| 1529 | print_object_command (char *args, int from_tty) |
| 1530 | { |
| 1531 | struct value *object, *function, *description; |
| 1532 | CORE_ADDR string_addr, object_addr; |
| 1533 | int i = 0; |
| 1534 | char c = -1; |
| 1535 | |
| 1536 | if (!args || !*args) |
| 1537 | error ( |
| 1538 | "The 'print-object' command requires an argument (an Objective-C object)"); |
| 1539 | |
| 1540 | { |
| 1541 | struct expression *expr = parse_expression (args); |
| 1542 | struct cleanup *old_chain = |
| 1543 | make_cleanup (free_current_contents, &expr); |
| 1544 | int pc = 0; |
| 1545 | |
| 1546 | object = expr->language_defn->la_exp_desc->evaluate_exp |
| 1547 | (builtin_type_void_data_ptr, expr, &pc, EVAL_NORMAL); |
| 1548 | do_cleanups (old_chain); |
| 1549 | } |
| 1550 | |
| 1551 | /* Validate the address for sanity. */ |
| 1552 | object_addr = value_as_long (object); |
| 1553 | read_memory (object_addr, &c, 1); |
| 1554 | |
| 1555 | function = find_function_in_inferior ("_NSPrintForDebugger"); |
| 1556 | if (function == NULL) |
| 1557 | error ("Unable to locate _NSPrintForDebugger in child process"); |
| 1558 | |
| 1559 | description = call_function_by_hand (function, 1, &object); |
| 1560 | |
| 1561 | string_addr = value_as_long (description); |
| 1562 | if (string_addr == 0) |
| 1563 | error ("object returns null description"); |
| 1564 | |
| 1565 | read_memory (string_addr + i++, &c, 1); |
| 1566 | if (c != '\0') |
| 1567 | do |
| 1568 | { /* Read and print characters up to EOS. */ |
| 1569 | QUIT; |
| 1570 | printf_filtered ("%c", c); |
| 1571 | read_memory (string_addr + i++, &c, 1); |
| 1572 | } while (c != 0); |
| 1573 | else |
| 1574 | printf_filtered("<object returns empty description>"); |
| 1575 | printf_filtered ("\n"); |
| 1576 | } |
| 1577 | |
| 1578 | /* The data structure 'methcalls' is used to detect method calls (thru |
| 1579 | * ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.), |
| 1580 | * and ultimately find the method being called. |
| 1581 | */ |
| 1582 | |
| 1583 | struct objc_methcall { |
| 1584 | char *name; |
| 1585 | /* Return instance method to be called. */ |
| 1586 | int (*stop_at) (CORE_ADDR, CORE_ADDR *); |
| 1587 | /* Start of pc range corresponding to method invocation. */ |
| 1588 | CORE_ADDR begin; |
| 1589 | /* End of pc range corresponding to method invocation. */ |
| 1590 | CORE_ADDR end; |
| 1591 | }; |
| 1592 | |
| 1593 | static int resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1594 | static int resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1595 | static int resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1596 | static int resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc); |
| 1597 | |
| 1598 | static struct objc_methcall methcalls[] = { |
| 1599 | { "_objc_msgSend", resolve_msgsend, 0, 0}, |
| 1600 | { "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0}, |
| 1601 | { "_objc_msgSendSuper", resolve_msgsend_super, 0, 0}, |
| 1602 | { "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0}, |
| 1603 | { "_objc_getClass", NULL, 0, 0}, |
| 1604 | { "_objc_getMetaClass", NULL, 0, 0} |
| 1605 | }; |
| 1606 | |
| 1607 | #define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0])) |
| 1608 | |
| 1609 | /* The following function, "find_objc_msgsend", fills in the data |
| 1610 | * structure "objc_msgs" by finding the addresses of each of the |
| 1611 | * (currently four) functions that it holds (of which objc_msgSend is |
| 1612 | * the first). This must be called each time symbols are loaded, in |
| 1613 | * case the functions have moved for some reason. |
| 1614 | */ |
| 1615 | |
| 1616 | static void |
| 1617 | find_objc_msgsend (void) |
| 1618 | { |
| 1619 | unsigned int i; |
| 1620 | for (i = 0; i < nmethcalls; i++) { |
| 1621 | |
| 1622 | struct minimal_symbol *func; |
| 1623 | |
| 1624 | /* Try both with and without underscore. */ |
| 1625 | func = lookup_minimal_symbol (methcalls[i].name, NULL, NULL); |
| 1626 | if ((func == NULL) && (methcalls[i].name[0] == '_')) { |
| 1627 | func = lookup_minimal_symbol (methcalls[i].name + 1, NULL, NULL); |
| 1628 | } |
| 1629 | if (func == NULL) { |
| 1630 | methcalls[i].begin = 0; |
| 1631 | methcalls[i].end = 0; |
| 1632 | continue; |
| 1633 | } |
| 1634 | |
| 1635 | methcalls[i].begin = SYMBOL_VALUE_ADDRESS (func); |
| 1636 | do { |
| 1637 | methcalls[i].end = SYMBOL_VALUE_ADDRESS (++func); |
| 1638 | } while (methcalls[i].begin == methcalls[i].end); |
| 1639 | } |
| 1640 | } |
| 1641 | |
| 1642 | /* find_objc_msgcall (replaces pc_off_limits) |
| 1643 | * |
| 1644 | * ALL that this function now does is to determine whether the input |
| 1645 | * address ("pc") is the address of one of the Objective-C message |
| 1646 | * dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and |
| 1647 | * if so, it returns the address of the method that will be called. |
| 1648 | * |
| 1649 | * The old function "pc_off_limits" used to do a lot of other things |
| 1650 | * in addition, such as detecting shared library jump stubs and |
| 1651 | * returning the address of the shlib function that would be called. |
| 1652 | * That functionality has been moved into the SKIP_TRAMPOLINE_CODE and |
| 1653 | * IN_SOLIB_TRAMPOLINE macros, which are resolved in the target- |
| 1654 | * dependent modules. |
| 1655 | */ |
| 1656 | |
| 1657 | struct objc_submethod_helper_data { |
| 1658 | int (*f) (CORE_ADDR, CORE_ADDR *); |
| 1659 | CORE_ADDR pc; |
| 1660 | CORE_ADDR *new_pc; |
| 1661 | }; |
| 1662 | |
| 1663 | static int |
| 1664 | find_objc_msgcall_submethod_helper (void * arg) |
| 1665 | { |
| 1666 | struct objc_submethod_helper_data *s = |
| 1667 | (struct objc_submethod_helper_data *) arg; |
| 1668 | |
| 1669 | if (s->f (s->pc, s->new_pc) == 0) |
| 1670 | return 1; |
| 1671 | else |
| 1672 | return 0; |
| 1673 | } |
| 1674 | |
| 1675 | static int |
| 1676 | find_objc_msgcall_submethod (int (*f) (CORE_ADDR, CORE_ADDR *), |
| 1677 | CORE_ADDR pc, |
| 1678 | CORE_ADDR *new_pc) |
| 1679 | { |
| 1680 | struct objc_submethod_helper_data s; |
| 1681 | |
| 1682 | s.f = f; |
| 1683 | s.pc = pc; |
| 1684 | s.new_pc = new_pc; |
| 1685 | |
| 1686 | if (catch_errors (find_objc_msgcall_submethod_helper, |
| 1687 | (void *) &s, |
| 1688 | "Unable to determine target of Objective-C method call (ignoring):\n", |
| 1689 | RETURN_MASK_ALL) == 0) |
| 1690 | return 1; |
| 1691 | else |
| 1692 | return 0; |
| 1693 | } |
| 1694 | |
| 1695 | int |
| 1696 | find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1697 | { |
| 1698 | unsigned int i; |
| 1699 | |
| 1700 | find_objc_msgsend (); |
| 1701 | if (new_pc != NULL) |
| 1702 | { |
| 1703 | *new_pc = 0; |
| 1704 | } |
| 1705 | |
| 1706 | for (i = 0; i < nmethcalls; i++) |
| 1707 | if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end)) |
| 1708 | { |
| 1709 | if (methcalls[i].stop_at != NULL) |
| 1710 | return find_objc_msgcall_submethod (methcalls[i].stop_at, |
| 1711 | pc, new_pc); |
| 1712 | else |
| 1713 | return 0; |
| 1714 | } |
| 1715 | |
| 1716 | return 0; |
| 1717 | } |
| 1718 | |
| 1719 | extern initialize_file_ftype _initialize_objc_language; /* -Wmissing-prototypes */ |
| 1720 | |
| 1721 | void |
| 1722 | _initialize_objc_language (void) |
| 1723 | { |
| 1724 | add_language (&objc_language_defn); |
| 1725 | add_info ("selectors", selectors_info, /* INFO SELECTORS command. */ |
| 1726 | "All Objective-C selectors, or those matching REGEXP."); |
| 1727 | add_info ("classes", classes_info, /* INFO CLASSES command. */ |
| 1728 | "All Objective-C classes, or those matching REGEXP."); |
| 1729 | add_com ("print-object", class_vars, print_object_command, |
| 1730 | "Ask an Objective-C object to print itself."); |
| 1731 | add_com_alias ("po", "print-object", class_vars, 1); |
| 1732 | } |
| 1733 | |
| 1734 | static void |
| 1735 | read_objc_method (CORE_ADDR addr, struct objc_method *method) |
| 1736 | { |
| 1737 | method->name = read_memory_unsigned_integer (addr + 0, 4); |
| 1738 | method->types = read_memory_unsigned_integer (addr + 4, 4); |
| 1739 | method->imp = read_memory_unsigned_integer (addr + 8, 4); |
| 1740 | } |
| 1741 | |
| 1742 | static |
| 1743 | unsigned long read_objc_methlist_nmethods (CORE_ADDR addr) |
| 1744 | { |
| 1745 | return read_memory_unsigned_integer (addr + 4, 4); |
| 1746 | } |
| 1747 | |
| 1748 | static void |
| 1749 | read_objc_methlist_method (CORE_ADDR addr, unsigned long num, |
| 1750 | struct objc_method *method) |
| 1751 | { |
| 1752 | gdb_assert (num < read_objc_methlist_nmethods (addr)); |
| 1753 | read_objc_method (addr + 8 + (12 * num), method); |
| 1754 | } |
| 1755 | |
| 1756 | static void |
| 1757 | read_objc_object (CORE_ADDR addr, struct objc_object *object) |
| 1758 | { |
| 1759 | object->isa = read_memory_unsigned_integer (addr, 4); |
| 1760 | } |
| 1761 | |
| 1762 | static void |
| 1763 | read_objc_super (CORE_ADDR addr, struct objc_super *super) |
| 1764 | { |
| 1765 | super->receiver = read_memory_unsigned_integer (addr, 4); |
| 1766 | super->class = read_memory_unsigned_integer (addr + 4, 4); |
| 1767 | }; |
| 1768 | |
| 1769 | static void |
| 1770 | read_objc_class (CORE_ADDR addr, struct objc_class *class) |
| 1771 | { |
| 1772 | class->isa = read_memory_unsigned_integer (addr, 4); |
| 1773 | class->super_class = read_memory_unsigned_integer (addr + 4, 4); |
| 1774 | class->name = read_memory_unsigned_integer (addr + 8, 4); |
| 1775 | class->version = read_memory_unsigned_integer (addr + 12, 4); |
| 1776 | class->info = read_memory_unsigned_integer (addr + 16, 4); |
| 1777 | class->instance_size = read_memory_unsigned_integer (addr + 18, 4); |
| 1778 | class->ivars = read_memory_unsigned_integer (addr + 24, 4); |
| 1779 | class->methods = read_memory_unsigned_integer (addr + 28, 4); |
| 1780 | class->cache = read_memory_unsigned_integer (addr + 32, 4); |
| 1781 | class->protocols = read_memory_unsigned_integer (addr + 36, 4); |
| 1782 | } |
| 1783 | |
| 1784 | static CORE_ADDR |
| 1785 | find_implementation_from_class (CORE_ADDR class, CORE_ADDR sel) |
| 1786 | { |
| 1787 | CORE_ADDR subclass = class; |
| 1788 | |
| 1789 | while (subclass != 0) |
| 1790 | { |
| 1791 | |
| 1792 | struct objc_class class_str; |
| 1793 | unsigned mlistnum = 0; |
| 1794 | |
| 1795 | read_objc_class (subclass, &class_str); |
| 1796 | |
| 1797 | for (;;) |
| 1798 | { |
| 1799 | CORE_ADDR mlist; |
| 1800 | unsigned long nmethods; |
| 1801 | unsigned long i; |
| 1802 | |
| 1803 | mlist = read_memory_unsigned_integer (class_str.methods + |
| 1804 | (4 * mlistnum), 4); |
| 1805 | if (mlist == 0) |
| 1806 | break; |
| 1807 | |
| 1808 | nmethods = read_objc_methlist_nmethods (mlist); |
| 1809 | |
| 1810 | for (i = 0; i < nmethods; i++) |
| 1811 | { |
| 1812 | struct objc_method meth_str; |
| 1813 | read_objc_methlist_method (mlist, i, &meth_str); |
| 1814 | |
| 1815 | #if 0 |
| 1816 | fprintf (stderr, |
| 1817 | "checking method 0x%lx against selector 0x%lx\n", |
| 1818 | meth_str.name, sel); |
| 1819 | #endif |
| 1820 | |
| 1821 | if (meth_str.name == sel) |
| 1822 | /* FIXME: hppa arch was doing a pointer dereference |
| 1823 | here. There needs to be a better way to do that. */ |
| 1824 | return meth_str.imp; |
| 1825 | } |
| 1826 | mlistnum++; |
| 1827 | } |
| 1828 | subclass = class_str.super_class; |
| 1829 | } |
| 1830 | |
| 1831 | return 0; |
| 1832 | } |
| 1833 | |
| 1834 | static CORE_ADDR |
| 1835 | find_implementation (CORE_ADDR object, CORE_ADDR sel) |
| 1836 | { |
| 1837 | struct objc_object ostr; |
| 1838 | |
| 1839 | if (object == 0) |
| 1840 | return 0; |
| 1841 | read_objc_object (object, &ostr); |
| 1842 | if (ostr.isa == 0) |
| 1843 | return 0; |
| 1844 | |
| 1845 | return find_implementation_from_class (ostr.isa, sel); |
| 1846 | } |
| 1847 | |
| 1848 | #define OBJC_FETCH_POINTER_ARGUMENT(argi) \ |
| 1849 | FETCH_POINTER_ARGUMENT (get_current_frame (), argi, builtin_type_void_func_ptr) |
| 1850 | |
| 1851 | static int |
| 1852 | resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1853 | { |
| 1854 | CORE_ADDR object; |
| 1855 | CORE_ADDR sel; |
| 1856 | CORE_ADDR res; |
| 1857 | |
| 1858 | object = OBJC_FETCH_POINTER_ARGUMENT (0); |
| 1859 | sel = OBJC_FETCH_POINTER_ARGUMENT (1); |
| 1860 | |
| 1861 | res = find_implementation (object, sel); |
| 1862 | if (new_pc != 0) |
| 1863 | *new_pc = res; |
| 1864 | if (res == 0) |
| 1865 | return 1; |
| 1866 | return 0; |
| 1867 | } |
| 1868 | |
| 1869 | static int |
| 1870 | resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1871 | { |
| 1872 | CORE_ADDR object; |
| 1873 | CORE_ADDR sel; |
| 1874 | CORE_ADDR res; |
| 1875 | |
| 1876 | object = OBJC_FETCH_POINTER_ARGUMENT (1); |
| 1877 | sel = OBJC_FETCH_POINTER_ARGUMENT (2); |
| 1878 | |
| 1879 | res = find_implementation (object, sel); |
| 1880 | if (new_pc != 0) |
| 1881 | *new_pc = res; |
| 1882 | if (res == 0) |
| 1883 | return 1; |
| 1884 | return 0; |
| 1885 | } |
| 1886 | |
| 1887 | static int |
| 1888 | resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1889 | { |
| 1890 | struct objc_super sstr; |
| 1891 | |
| 1892 | CORE_ADDR super; |
| 1893 | CORE_ADDR sel; |
| 1894 | CORE_ADDR res; |
| 1895 | |
| 1896 | super = OBJC_FETCH_POINTER_ARGUMENT (0); |
| 1897 | sel = OBJC_FETCH_POINTER_ARGUMENT (1); |
| 1898 | |
| 1899 | read_objc_super (super, &sstr); |
| 1900 | if (sstr.class == 0) |
| 1901 | return 0; |
| 1902 | |
| 1903 | res = find_implementation_from_class (sstr.class, sel); |
| 1904 | if (new_pc != 0) |
| 1905 | *new_pc = res; |
| 1906 | if (res == 0) |
| 1907 | return 1; |
| 1908 | return 0; |
| 1909 | } |
| 1910 | |
| 1911 | static int |
| 1912 | resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc) |
| 1913 | { |
| 1914 | struct objc_super sstr; |
| 1915 | |
| 1916 | CORE_ADDR super; |
| 1917 | CORE_ADDR sel; |
| 1918 | CORE_ADDR res; |
| 1919 | |
| 1920 | super = OBJC_FETCH_POINTER_ARGUMENT (1); |
| 1921 | sel = OBJC_FETCH_POINTER_ARGUMENT (2); |
| 1922 | |
| 1923 | read_objc_super (super, &sstr); |
| 1924 | if (sstr.class == 0) |
| 1925 | return 0; |
| 1926 | |
| 1927 | res = find_implementation_from_class (sstr.class, sel); |
| 1928 | if (new_pc != 0) |
| 1929 | *new_pc = res; |
| 1930 | if (res == 0) |
| 1931 | return 1; |
| 1932 | return 0; |
| 1933 | } |