| 1 | /* Support routines for building symbol tables in GDB's internal format. |
| 2 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 3 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, |
| 4 | 2010 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* This module provides subroutines used for creating and adding to |
| 22 | the symbol table. These routines are called from various symbol- |
| 23 | file-reading routines. |
| 24 | |
| 25 | Routines to support specific debugging information formats (stabs, |
| 26 | DWARF, etc) belong somewhere else. */ |
| 27 | |
| 28 | #include "defs.h" |
| 29 | #include "bfd.h" |
| 30 | #include "gdb_obstack.h" |
| 31 | #include "symtab.h" |
| 32 | #include "symfile.h" |
| 33 | #include "objfiles.h" |
| 34 | #include "gdbtypes.h" |
| 35 | #include "gdb_assert.h" |
| 36 | #include "complaints.h" |
| 37 | #include "gdb_string.h" |
| 38 | #include "expression.h" /* For "enum exp_opcode" used by... */ |
| 39 | #include "bcache.h" |
| 40 | #include "filenames.h" /* For DOSish file names */ |
| 41 | #include "macrotab.h" |
| 42 | #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */ |
| 43 | #include "block.h" |
| 44 | #include "cp-support.h" |
| 45 | #include "dictionary.h" |
| 46 | #include "addrmap.h" |
| 47 | |
| 48 | /* Ask buildsym.h to define the vars it normally declares `extern'. */ |
| 49 | #define EXTERN |
| 50 | /**/ |
| 51 | #include "buildsym.h" /* Our own declarations */ |
| 52 | #undef EXTERN |
| 53 | |
| 54 | /* For cleanup_undefined_types and finish_global_stabs (somewhat |
| 55 | questionable--see comment where we call them). */ |
| 56 | |
| 57 | #include "stabsread.h" |
| 58 | |
| 59 | /* List of subfiles. */ |
| 60 | |
| 61 | static struct subfile *subfiles; |
| 62 | |
| 63 | /* List of free `struct pending' structures for reuse. */ |
| 64 | |
| 65 | static struct pending *free_pendings; |
| 66 | |
| 67 | /* Non-zero if symtab has line number info. This prevents an |
| 68 | otherwise empty symtab from being tossed. */ |
| 69 | |
| 70 | static int have_line_numbers; |
| 71 | |
| 72 | /* The mutable address map for the compilation unit whose symbols |
| 73 | we're currently reading. The symtabs' shared blockvector will |
| 74 | point to a fixed copy of this. */ |
| 75 | static struct addrmap *pending_addrmap; |
| 76 | |
| 77 | /* The obstack on which we allocate pending_addrmap. |
| 78 | If pending_addrmap is NULL, this is uninitialized; otherwise, it is |
| 79 | initialized (and holds pending_addrmap). */ |
| 80 | static struct obstack pending_addrmap_obstack; |
| 81 | |
| 82 | /* Non-zero if we recorded any ranges in the addrmap that are |
| 83 | different from those in the blockvector already. We set this to |
| 84 | zero when we start processing a symfile, and if it's still zero at |
| 85 | the end, then we just toss the addrmap. */ |
| 86 | static int pending_addrmap_interesting; |
| 87 | |
| 88 | \f |
| 89 | static int compare_line_numbers (const void *ln1p, const void *ln2p); |
| 90 | \f |
| 91 | |
| 92 | /* Initial sizes of data structures. These are realloc'd larger if |
| 93 | needed, and realloc'd down to the size actually used, when |
| 94 | completed. */ |
| 95 | |
| 96 | #define INITIAL_CONTEXT_STACK_SIZE 10 |
| 97 | #define INITIAL_LINE_VECTOR_LENGTH 1000 |
| 98 | \f |
| 99 | |
| 100 | /* maintain the lists of symbols and blocks */ |
| 101 | |
| 102 | /* Add a pending list to free_pendings. */ |
| 103 | void |
| 104 | add_free_pendings (struct pending *list) |
| 105 | { |
| 106 | struct pending *link = list; |
| 107 | |
| 108 | if (list) |
| 109 | { |
| 110 | while (link->next) link = link->next; |
| 111 | link->next = free_pendings; |
| 112 | free_pendings = list; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | /* Add a symbol to one of the lists of symbols. While we're at it, if |
| 117 | we're in the C++ case and don't have full namespace debugging info, |
| 118 | check to see if it references an anonymous namespace; if so, add an |
| 119 | appropriate using directive. */ |
| 120 | |
| 121 | void |
| 122 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) |
| 123 | { |
| 124 | struct pending *link; |
| 125 | |
| 126 | /* If this is an alias for another symbol, don't add it. */ |
| 127 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') |
| 128 | return; |
| 129 | |
| 130 | /* We keep PENDINGSIZE symbols in each link of the list. If we |
| 131 | don't have a link with room in it, add a new link. */ |
| 132 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) |
| 133 | { |
| 134 | if (free_pendings) |
| 135 | { |
| 136 | link = free_pendings; |
| 137 | free_pendings = link->next; |
| 138 | } |
| 139 | else |
| 140 | { |
| 141 | link = (struct pending *) xmalloc (sizeof (struct pending)); |
| 142 | } |
| 143 | |
| 144 | link->next = *listhead; |
| 145 | *listhead = link; |
| 146 | link->nsyms = 0; |
| 147 | } |
| 148 | |
| 149 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; |
| 150 | } |
| 151 | |
| 152 | /* Find a symbol named NAME on a LIST. NAME need not be |
| 153 | '\0'-terminated; LENGTH is the length of the name. */ |
| 154 | |
| 155 | struct symbol * |
| 156 | find_symbol_in_list (struct pending *list, char *name, int length) |
| 157 | { |
| 158 | int j; |
| 159 | char *pp; |
| 160 | |
| 161 | while (list != NULL) |
| 162 | { |
| 163 | for (j = list->nsyms; --j >= 0;) |
| 164 | { |
| 165 | pp = SYMBOL_LINKAGE_NAME (list->symbol[j]); |
| 166 | if (*pp == *name && strncmp (pp, name, length) == 0 |
| 167 | && pp[length] == '\0') |
| 168 | { |
| 169 | return (list->symbol[j]); |
| 170 | } |
| 171 | } |
| 172 | list = list->next; |
| 173 | } |
| 174 | return (NULL); |
| 175 | } |
| 176 | |
| 177 | /* At end of reading syms, or in case of quit, really free as many |
| 178 | `struct pending's as we can easily find. */ |
| 179 | |
| 180 | void |
| 181 | really_free_pendings (void *dummy) |
| 182 | { |
| 183 | struct pending *next, *next1; |
| 184 | |
| 185 | for (next = free_pendings; next; next = next1) |
| 186 | { |
| 187 | next1 = next->next; |
| 188 | xfree ((void *) next); |
| 189 | } |
| 190 | free_pendings = NULL; |
| 191 | |
| 192 | free_pending_blocks (); |
| 193 | |
| 194 | for (next = file_symbols; next != NULL; next = next1) |
| 195 | { |
| 196 | next1 = next->next; |
| 197 | xfree ((void *) next); |
| 198 | } |
| 199 | file_symbols = NULL; |
| 200 | |
| 201 | for (next = global_symbols; next != NULL; next = next1) |
| 202 | { |
| 203 | next1 = next->next; |
| 204 | xfree ((void *) next); |
| 205 | } |
| 206 | global_symbols = NULL; |
| 207 | |
| 208 | if (pending_macros) |
| 209 | free_macro_table (pending_macros); |
| 210 | |
| 211 | if (pending_addrmap) |
| 212 | { |
| 213 | obstack_free (&pending_addrmap_obstack, NULL); |
| 214 | pending_addrmap = NULL; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /* This function is called to discard any pending blocks. */ |
| 219 | |
| 220 | void |
| 221 | free_pending_blocks (void) |
| 222 | { |
| 223 | /* The links are made in the objfile_obstack, so we only need to |
| 224 | reset PENDING_BLOCKS. */ |
| 225 | pending_blocks = NULL; |
| 226 | } |
| 227 | |
| 228 | /* Take one of the lists of symbols and make a block from it. Keep |
| 229 | the order the symbols have in the list (reversed from the input |
| 230 | file). Put the block on the list of pending blocks. */ |
| 231 | |
| 232 | struct block * |
| 233 | finish_block (struct symbol *symbol, struct pending **listhead, |
| 234 | struct pending_block *old_blocks, |
| 235 | CORE_ADDR start, CORE_ADDR end, |
| 236 | struct objfile *objfile) |
| 237 | { |
| 238 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 239 | struct pending *next, *next1; |
| 240 | struct block *block; |
| 241 | struct pending_block *pblock; |
| 242 | struct pending_block *opblock; |
| 243 | |
| 244 | block = allocate_block (&objfile->objfile_obstack); |
| 245 | |
| 246 | if (symbol) |
| 247 | { |
| 248 | BLOCK_DICT (block) = dict_create_linear (&objfile->objfile_obstack, |
| 249 | *listhead); |
| 250 | } |
| 251 | else |
| 252 | { |
| 253 | BLOCK_DICT (block) = dict_create_hashed (&objfile->objfile_obstack, |
| 254 | *listhead); |
| 255 | } |
| 256 | |
| 257 | BLOCK_START (block) = start; |
| 258 | BLOCK_END (block) = end; |
| 259 | /* Superblock filled in when containing block is made */ |
| 260 | BLOCK_SUPERBLOCK (block) = NULL; |
| 261 | BLOCK_NAMESPACE (block) = NULL; |
| 262 | |
| 263 | /* Put the block in as the value of the symbol that names it. */ |
| 264 | |
| 265 | if (symbol) |
| 266 | { |
| 267 | struct type *ftype = SYMBOL_TYPE (symbol); |
| 268 | struct dict_iterator iter; |
| 269 | SYMBOL_BLOCK_VALUE (symbol) = block; |
| 270 | BLOCK_FUNCTION (block) = symbol; |
| 271 | |
| 272 | if (TYPE_NFIELDS (ftype) <= 0) |
| 273 | { |
| 274 | /* No parameter type information is recorded with the |
| 275 | function's type. Set that from the type of the |
| 276 | parameter symbols. */ |
| 277 | int nparams = 0, iparams; |
| 278 | struct symbol *sym; |
| 279 | ALL_BLOCK_SYMBOLS (block, iter, sym) |
| 280 | { |
| 281 | if (SYMBOL_IS_ARGUMENT (sym)) |
| 282 | nparams++; |
| 283 | } |
| 284 | if (nparams > 0) |
| 285 | { |
| 286 | TYPE_NFIELDS (ftype) = nparams; |
| 287 | TYPE_FIELDS (ftype) = (struct field *) |
| 288 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); |
| 289 | |
| 290 | iparams = 0; |
| 291 | ALL_BLOCK_SYMBOLS (block, iter, sym) |
| 292 | { |
| 293 | if (iparams == nparams) |
| 294 | break; |
| 295 | |
| 296 | if (SYMBOL_IS_ARGUMENT (sym)) |
| 297 | { |
| 298 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
| 299 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 300 | iparams++; |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | else |
| 307 | { |
| 308 | BLOCK_FUNCTION (block) = NULL; |
| 309 | } |
| 310 | |
| 311 | /* Now "free" the links of the list, and empty the list. */ |
| 312 | |
| 313 | for (next = *listhead; next; next = next1) |
| 314 | { |
| 315 | next1 = next->next; |
| 316 | next->next = free_pendings; |
| 317 | free_pendings = next; |
| 318 | } |
| 319 | *listhead = NULL; |
| 320 | |
| 321 | /* Check to be sure that the blocks have an end address that is |
| 322 | greater than starting address */ |
| 323 | |
| 324 | if (BLOCK_END (block) < BLOCK_START (block)) |
| 325 | { |
| 326 | if (symbol) |
| 327 | { |
| 328 | complaint (&symfile_complaints, |
| 329 | _("block end address less than block start address in %s (patched it)"), |
| 330 | SYMBOL_PRINT_NAME (symbol)); |
| 331 | } |
| 332 | else |
| 333 | { |
| 334 | complaint (&symfile_complaints, |
| 335 | _("block end address %s less than block start address %s (patched it)"), |
| 336 | paddress (gdbarch, BLOCK_END (block)), |
| 337 | paddress (gdbarch, BLOCK_START (block))); |
| 338 | } |
| 339 | /* Better than nothing */ |
| 340 | BLOCK_END (block) = BLOCK_START (block); |
| 341 | } |
| 342 | |
| 343 | /* Install this block as the superblock of all blocks made since the |
| 344 | start of this scope that don't have superblocks yet. */ |
| 345 | |
| 346 | opblock = NULL; |
| 347 | for (pblock = pending_blocks; |
| 348 | pblock && pblock != old_blocks; |
| 349 | pblock = pblock->next) |
| 350 | { |
| 351 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) |
| 352 | { |
| 353 | /* Check to be sure the blocks are nested as we receive |
| 354 | them. If the compiler/assembler/linker work, this just |
| 355 | burns a small amount of time. |
| 356 | |
| 357 | Skip blocks which correspond to a function; they're not |
| 358 | physically nested inside this other blocks, only |
| 359 | lexically nested. */ |
| 360 | if (BLOCK_FUNCTION (pblock->block) == NULL |
| 361 | && (BLOCK_START (pblock->block) < BLOCK_START (block) |
| 362 | || BLOCK_END (pblock->block) > BLOCK_END (block))) |
| 363 | { |
| 364 | if (symbol) |
| 365 | { |
| 366 | complaint (&symfile_complaints, |
| 367 | _("inner block not inside outer block in %s"), |
| 368 | SYMBOL_PRINT_NAME (symbol)); |
| 369 | } |
| 370 | else |
| 371 | { |
| 372 | complaint (&symfile_complaints, |
| 373 | _("inner block (%s-%s) not inside outer block (%s-%s)"), |
| 374 | paddress (gdbarch, BLOCK_START (pblock->block)), |
| 375 | paddress (gdbarch, BLOCK_END (pblock->block)), |
| 376 | paddress (gdbarch, BLOCK_START (block)), |
| 377 | paddress (gdbarch, BLOCK_END (block))); |
| 378 | } |
| 379 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) |
| 380 | BLOCK_START (pblock->block) = BLOCK_START (block); |
| 381 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) |
| 382 | BLOCK_END (pblock->block) = BLOCK_END (block); |
| 383 | } |
| 384 | BLOCK_SUPERBLOCK (pblock->block) = block; |
| 385 | } |
| 386 | opblock = pblock; |
| 387 | } |
| 388 | |
| 389 | block_set_using (block, using_directives, &objfile->objfile_obstack); |
| 390 | |
| 391 | record_pending_block (objfile, block, opblock); |
| 392 | |
| 393 | return block; |
| 394 | } |
| 395 | |
| 396 | |
| 397 | /* Record BLOCK on the list of all blocks in the file. Put it after |
| 398 | OPBLOCK, or at the beginning if opblock is NULL. This puts the |
| 399 | block in the list after all its subblocks. |
| 400 | |
| 401 | Allocate the pending block struct in the objfile_obstack to save |
| 402 | time. This wastes a little space. FIXME: Is it worth it? */ |
| 403 | |
| 404 | void |
| 405 | record_pending_block (struct objfile *objfile, struct block *block, |
| 406 | struct pending_block *opblock) |
| 407 | { |
| 408 | struct pending_block *pblock; |
| 409 | |
| 410 | pblock = (struct pending_block *) |
| 411 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct pending_block)); |
| 412 | pblock->block = block; |
| 413 | if (opblock) |
| 414 | { |
| 415 | pblock->next = opblock->next; |
| 416 | opblock->next = pblock; |
| 417 | } |
| 418 | else |
| 419 | { |
| 420 | pblock->next = pending_blocks; |
| 421 | pending_blocks = pblock; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | |
| 426 | /* Record that the range of addresses from START to END_INCLUSIVE |
| 427 | (inclusive, like it says) belongs to BLOCK. BLOCK's start and end |
| 428 | addresses must be set already. You must apply this function to all |
| 429 | BLOCK's children before applying it to BLOCK. |
| 430 | |
| 431 | If a call to this function complicates the picture beyond that |
| 432 | already provided by BLOCK_START and BLOCK_END, then we create an |
| 433 | address map for the block. */ |
| 434 | void |
| 435 | record_block_range (struct block *block, |
| 436 | CORE_ADDR start, CORE_ADDR end_inclusive) |
| 437 | { |
| 438 | /* If this is any different from the range recorded in the block's |
| 439 | own BLOCK_START and BLOCK_END, then note that the address map has |
| 440 | become interesting. Note that even if this block doesn't have |
| 441 | any "interesting" ranges, some later block might, so we still |
| 442 | need to record this block in the addrmap. */ |
| 443 | if (start != BLOCK_START (block) |
| 444 | || end_inclusive + 1 != BLOCK_END (block)) |
| 445 | pending_addrmap_interesting = 1; |
| 446 | |
| 447 | if (! pending_addrmap) |
| 448 | { |
| 449 | obstack_init (&pending_addrmap_obstack); |
| 450 | pending_addrmap = addrmap_create_mutable (&pending_addrmap_obstack); |
| 451 | } |
| 452 | |
| 453 | addrmap_set_empty (pending_addrmap, start, end_inclusive, block); |
| 454 | } |
| 455 | |
| 456 | |
| 457 | static struct blockvector * |
| 458 | make_blockvector (struct objfile *objfile) |
| 459 | { |
| 460 | struct pending_block *next; |
| 461 | struct blockvector *blockvector; |
| 462 | int i; |
| 463 | |
| 464 | /* Count the length of the list of blocks. */ |
| 465 | |
| 466 | for (next = pending_blocks, i = 0; next; next = next->next, i++) |
| 467 | {; |
| 468 | } |
| 469 | |
| 470 | blockvector = (struct blockvector *) |
| 471 | obstack_alloc (&objfile->objfile_obstack, |
| 472 | (sizeof (struct blockvector) |
| 473 | + (i - 1) * sizeof (struct block *))); |
| 474 | |
| 475 | /* Copy the blocks into the blockvector. This is done in reverse |
| 476 | order, which happens to put the blocks into the proper order |
| 477 | (ascending starting address). finish_block has hair to insert |
| 478 | each block into the list after its subblocks in order to make |
| 479 | sure this is true. */ |
| 480 | |
| 481 | BLOCKVECTOR_NBLOCKS (blockvector) = i; |
| 482 | for (next = pending_blocks; next; next = next->next) |
| 483 | { |
| 484 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; |
| 485 | } |
| 486 | |
| 487 | free_pending_blocks (); |
| 488 | |
| 489 | /* If we needed an address map for this symtab, record it in the |
| 490 | blockvector. */ |
| 491 | if (pending_addrmap && pending_addrmap_interesting) |
| 492 | BLOCKVECTOR_MAP (blockvector) |
| 493 | = addrmap_create_fixed (pending_addrmap, &objfile->objfile_obstack); |
| 494 | else |
| 495 | BLOCKVECTOR_MAP (blockvector) = 0; |
| 496 | |
| 497 | /* Some compilers output blocks in the wrong order, but we depend on |
| 498 | their being in the right order so we can binary search. Check the |
| 499 | order and moan about it. */ |
| 500 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) |
| 501 | { |
| 502 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) |
| 503 | { |
| 504 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) |
| 505 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) |
| 506 | { |
| 507 | CORE_ADDR start |
| 508 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); |
| 509 | |
| 510 | complaint (&symfile_complaints, _("block at %s out of order"), |
| 511 | hex_string ((LONGEST) start)); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | return (blockvector); |
| 517 | } |
| 518 | \f |
| 519 | /* Start recording information about source code that came from an |
| 520 | included (or otherwise merged-in) source file with a different |
| 521 | name. NAME is the name of the file (cannot be NULL), DIRNAME is |
| 522 | the directory in which the file was compiled (or NULL if not known). */ |
| 523 | |
| 524 | void |
| 525 | start_subfile (char *name, char *dirname) |
| 526 | { |
| 527 | struct subfile *subfile; |
| 528 | |
| 529 | /* See if this subfile is already known as a subfile of the current |
| 530 | main source file. */ |
| 531 | |
| 532 | for (subfile = subfiles; subfile; subfile = subfile->next) |
| 533 | { |
| 534 | char *subfile_name; |
| 535 | |
| 536 | /* If NAME is an absolute path, and this subfile is not, then |
| 537 | attempt to create an absolute path to compare. */ |
| 538 | if (IS_ABSOLUTE_PATH (name) |
| 539 | && !IS_ABSOLUTE_PATH (subfile->name) |
| 540 | && subfile->dirname != NULL) |
| 541 | subfile_name = concat (subfile->dirname, SLASH_STRING, |
| 542 | subfile->name, (char *) NULL); |
| 543 | else |
| 544 | subfile_name = subfile->name; |
| 545 | |
| 546 | if (FILENAME_CMP (subfile_name, name) == 0) |
| 547 | { |
| 548 | current_subfile = subfile; |
| 549 | if (subfile_name != subfile->name) |
| 550 | xfree (subfile_name); |
| 551 | return; |
| 552 | } |
| 553 | if (subfile_name != subfile->name) |
| 554 | xfree (subfile_name); |
| 555 | } |
| 556 | |
| 557 | /* This subfile is not known. Add an entry for it. Make an entry |
| 558 | for this subfile in the list of all subfiles of the current main |
| 559 | source file. */ |
| 560 | |
| 561 | subfile = (struct subfile *) xmalloc (sizeof (struct subfile)); |
| 562 | memset ((char *) subfile, 0, sizeof (struct subfile)); |
| 563 | subfile->next = subfiles; |
| 564 | subfiles = subfile; |
| 565 | current_subfile = subfile; |
| 566 | |
| 567 | /* Save its name and compilation directory name */ |
| 568 | subfile->name = (name == NULL) ? NULL : xstrdup (name); |
| 569 | subfile->dirname = (dirname == NULL) ? NULL : xstrdup (dirname); |
| 570 | |
| 571 | /* Initialize line-number recording for this subfile. */ |
| 572 | subfile->line_vector = NULL; |
| 573 | |
| 574 | /* Default the source language to whatever can be deduced from the |
| 575 | filename. If nothing can be deduced (such as for a C/C++ include |
| 576 | file with a ".h" extension), then inherit whatever language the |
| 577 | previous subfile had. This kludgery is necessary because there |
| 578 | is no standard way in some object formats to record the source |
| 579 | language. Also, when symtabs are allocated we try to deduce a |
| 580 | language then as well, but it is too late for us to use that |
| 581 | information while reading symbols, since symtabs aren't allocated |
| 582 | until after all the symbols have been processed for a given |
| 583 | source file. */ |
| 584 | |
| 585 | subfile->language = deduce_language_from_filename (subfile->name); |
| 586 | if (subfile->language == language_unknown |
| 587 | && subfile->next != NULL) |
| 588 | { |
| 589 | subfile->language = subfile->next->language; |
| 590 | } |
| 591 | |
| 592 | /* Initialize the debug format string to NULL. We may supply it |
| 593 | later via a call to record_debugformat. */ |
| 594 | subfile->debugformat = NULL; |
| 595 | |
| 596 | /* Similarly for the producer. */ |
| 597 | subfile->producer = NULL; |
| 598 | |
| 599 | /* If the filename of this subfile ends in .C, then change the |
| 600 | language of any pending subfiles from C to C++. We also accept |
| 601 | any other C++ suffixes accepted by deduce_language_from_filename. */ |
| 602 | /* Likewise for f2c. */ |
| 603 | |
| 604 | if (subfile->name) |
| 605 | { |
| 606 | struct subfile *s; |
| 607 | enum language sublang = deduce_language_from_filename (subfile->name); |
| 608 | |
| 609 | if (sublang == language_cplus || sublang == language_fortran) |
| 610 | for (s = subfiles; s != NULL; s = s->next) |
| 611 | if (s->language == language_c) |
| 612 | s->language = sublang; |
| 613 | } |
| 614 | |
| 615 | /* And patch up this file if necessary. */ |
| 616 | if (subfile->language == language_c |
| 617 | && subfile->next != NULL |
| 618 | && (subfile->next->language == language_cplus |
| 619 | || subfile->next->language == language_fortran)) |
| 620 | { |
| 621 | subfile->language = subfile->next->language; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | /* For stabs readers, the first N_SO symbol is assumed to be the |
| 626 | source file name, and the subfile struct is initialized using that |
| 627 | assumption. If another N_SO symbol is later seen, immediately |
| 628 | following the first one, then the first one is assumed to be the |
| 629 | directory name and the second one is really the source file name. |
| 630 | |
| 631 | So we have to patch up the subfile struct by moving the old name |
| 632 | value to dirname and remembering the new name. Some sanity |
| 633 | checking is performed to ensure that the state of the subfile |
| 634 | struct is reasonable and that the old name we are assuming to be a |
| 635 | directory name actually is (by checking for a trailing '/'). */ |
| 636 | |
| 637 | void |
| 638 | patch_subfile_names (struct subfile *subfile, char *name) |
| 639 | { |
| 640 | if (subfile != NULL && subfile->dirname == NULL && subfile->name != NULL |
| 641 | && subfile->name[strlen (subfile->name) - 1] == '/') |
| 642 | { |
| 643 | subfile->dirname = subfile->name; |
| 644 | subfile->name = xstrdup (name); |
| 645 | last_source_file = name; |
| 646 | |
| 647 | /* Default the source language to whatever can be deduced from |
| 648 | the filename. If nothing can be deduced (such as for a C/C++ |
| 649 | include file with a ".h" extension), then inherit whatever |
| 650 | language the previous subfile had. This kludgery is |
| 651 | necessary because there is no standard way in some object |
| 652 | formats to record the source language. Also, when symtabs |
| 653 | are allocated we try to deduce a language then as well, but |
| 654 | it is too late for us to use that information while reading |
| 655 | symbols, since symtabs aren't allocated until after all the |
| 656 | symbols have been processed for a given source file. */ |
| 657 | |
| 658 | subfile->language = deduce_language_from_filename (subfile->name); |
| 659 | if (subfile->language == language_unknown |
| 660 | && subfile->next != NULL) |
| 661 | { |
| 662 | subfile->language = subfile->next->language; |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | \f |
| 667 | /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for |
| 668 | switching source files (different subfiles, as we call them) within |
| 669 | one object file, but using a stack rather than in an arbitrary |
| 670 | order. */ |
| 671 | |
| 672 | void |
| 673 | push_subfile (void) |
| 674 | { |
| 675 | struct subfile_stack *tem |
| 676 | = (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack)); |
| 677 | |
| 678 | tem->next = subfile_stack; |
| 679 | subfile_stack = tem; |
| 680 | if (current_subfile == NULL || current_subfile->name == NULL) |
| 681 | { |
| 682 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 683 | } |
| 684 | tem->name = current_subfile->name; |
| 685 | } |
| 686 | |
| 687 | char * |
| 688 | pop_subfile (void) |
| 689 | { |
| 690 | char *name; |
| 691 | struct subfile_stack *link = subfile_stack; |
| 692 | |
| 693 | if (link == NULL) |
| 694 | { |
| 695 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 696 | } |
| 697 | name = link->name; |
| 698 | subfile_stack = link->next; |
| 699 | xfree ((void *) link); |
| 700 | return (name); |
| 701 | } |
| 702 | \f |
| 703 | /* Add a linetable entry for line number LINE and address PC to the |
| 704 | line vector for SUBFILE. */ |
| 705 | |
| 706 | void |
| 707 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
| 708 | { |
| 709 | struct linetable_entry *e; |
| 710 | /* Ignore the dummy line number in libg.o */ |
| 711 | |
| 712 | if (line == 0xffff) |
| 713 | { |
| 714 | return; |
| 715 | } |
| 716 | |
| 717 | /* Make sure line vector exists and is big enough. */ |
| 718 | if (!subfile->line_vector) |
| 719 | { |
| 720 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; |
| 721 | subfile->line_vector = (struct linetable *) |
| 722 | xmalloc (sizeof (struct linetable) |
| 723 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
| 724 | subfile->line_vector->nitems = 0; |
| 725 | have_line_numbers = 1; |
| 726 | } |
| 727 | |
| 728 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) |
| 729 | { |
| 730 | subfile->line_vector_length *= 2; |
| 731 | subfile->line_vector = (struct linetable *) |
| 732 | xrealloc ((char *) subfile->line_vector, |
| 733 | (sizeof (struct linetable) |
| 734 | + (subfile->line_vector_length |
| 735 | * sizeof (struct linetable_entry)))); |
| 736 | } |
| 737 | |
| 738 | /* Normally, we treat lines as unsorted. But the end of sequence |
| 739 | marker is special. We sort line markers at the same PC by line |
| 740 | number, so end of sequence markers (which have line == 0) appear |
| 741 | first. This is right if the marker ends the previous function, |
| 742 | and there is no padding before the next function. But it is |
| 743 | wrong if the previous line was empty and we are now marking a |
| 744 | switch to a different subfile. We must leave the end of sequence |
| 745 | marker at the end of this group of lines, not sort the empty line |
| 746 | to after the marker. The easiest way to accomplish this is to |
| 747 | delete any empty lines from our table, if they are followed by |
| 748 | end of sequence markers. All we lose is the ability to set |
| 749 | breakpoints at some lines which contain no instructions |
| 750 | anyway. */ |
| 751 | if (line == 0 && subfile->line_vector->nitems > 0) |
| 752 | { |
| 753 | e = subfile->line_vector->item + subfile->line_vector->nitems - 1; |
| 754 | while (subfile->line_vector->nitems > 0 && e->pc == pc) |
| 755 | { |
| 756 | e--; |
| 757 | subfile->line_vector->nitems--; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | e = subfile->line_vector->item + subfile->line_vector->nitems++; |
| 762 | e->line = line; |
| 763 | e->pc = pc; |
| 764 | } |
| 765 | |
| 766 | /* Needed in order to sort line tables from IBM xcoff files. Sigh! */ |
| 767 | |
| 768 | static int |
| 769 | compare_line_numbers (const void *ln1p, const void *ln2p) |
| 770 | { |
| 771 | struct linetable_entry *ln1 = (struct linetable_entry *) ln1p; |
| 772 | struct linetable_entry *ln2 = (struct linetable_entry *) ln2p; |
| 773 | |
| 774 | /* Note: this code does not assume that CORE_ADDRs can fit in ints. |
| 775 | Please keep it that way. */ |
| 776 | if (ln1->pc < ln2->pc) |
| 777 | return -1; |
| 778 | |
| 779 | if (ln1->pc > ln2->pc) |
| 780 | return 1; |
| 781 | |
| 782 | /* If pc equal, sort by line. I'm not sure whether this is optimum |
| 783 | behavior (see comment at struct linetable in symtab.h). */ |
| 784 | return ln1->line - ln2->line; |
| 785 | } |
| 786 | \f |
| 787 | /* Start a new symtab for a new source file. Called, for example, |
| 788 | when a stabs symbol of type N_SO is seen, or when a DWARF |
| 789 | TAG_compile_unit DIE is seen. It indicates the start of data for |
| 790 | one original source file. |
| 791 | |
| 792 | NAME is the name of the file (cannot be NULL). DIRNAME is the directory in |
| 793 | which the file was compiled (or NULL if not known). START_ADDR is the |
| 794 | lowest address of objects in the file (or 0 if not known). */ |
| 795 | |
| 796 | void |
| 797 | start_symtab (char *name, char *dirname, CORE_ADDR start_addr) |
| 798 | { |
| 799 | last_source_file = name; |
| 800 | last_source_start_addr = start_addr; |
| 801 | file_symbols = NULL; |
| 802 | global_symbols = NULL; |
| 803 | within_function = 0; |
| 804 | have_line_numbers = 0; |
| 805 | |
| 806 | /* Context stack is initially empty. Allocate first one with room |
| 807 | for 10 levels; reuse it forever afterward. */ |
| 808 | if (context_stack == NULL) |
| 809 | { |
| 810 | context_stack_size = INITIAL_CONTEXT_STACK_SIZE; |
| 811 | context_stack = (struct context_stack *) |
| 812 | xmalloc (context_stack_size * sizeof (struct context_stack)); |
| 813 | } |
| 814 | context_stack_depth = 0; |
| 815 | |
| 816 | /* We shouldn't have any address map at this point. */ |
| 817 | gdb_assert (! pending_addrmap); |
| 818 | |
| 819 | /* Initialize the list of sub source files with one entry for this |
| 820 | file (the top-level source file). */ |
| 821 | |
| 822 | subfiles = NULL; |
| 823 | current_subfile = NULL; |
| 824 | start_subfile (name, dirname); |
| 825 | } |
| 826 | |
| 827 | /* Subroutine of end_symtab to simplify it. |
| 828 | Look for a subfile that matches the main source file's basename. |
| 829 | If there is only one, and if the main source file doesn't have any |
| 830 | symbol or line number information, then copy this file's symtab and |
| 831 | line_vector to the main source file's subfile and discard the other subfile. |
| 832 | This can happen because of a compiler bug or from the user playing games |
| 833 | with #line or from things like a distributed build system that manipulates |
| 834 | the debug info. */ |
| 835 | |
| 836 | static void |
| 837 | watch_main_source_file_lossage (void) |
| 838 | { |
| 839 | struct subfile *mainsub, *subfile; |
| 840 | |
| 841 | /* Find the main source file. |
| 842 | This loop could be eliminated if start_symtab saved it for us. */ |
| 843 | mainsub = NULL; |
| 844 | for (subfile = subfiles; subfile; subfile = subfile->next) |
| 845 | { |
| 846 | /* The main subfile is guaranteed to be the last one. */ |
| 847 | if (subfile->next == NULL) |
| 848 | mainsub = subfile; |
| 849 | } |
| 850 | |
| 851 | /* If the main source file doesn't have any line number or symbol info, |
| 852 | look for an alias in another subfile. |
| 853 | We have to watch for mainsub == NULL here. It's a quirk of end_symtab, |
| 854 | it can return NULL so there may not be a main subfile. */ |
| 855 | |
| 856 | if (mainsub |
| 857 | && mainsub->line_vector == NULL |
| 858 | && mainsub->symtab == NULL) |
| 859 | { |
| 860 | const char *mainbase = lbasename (mainsub->name); |
| 861 | int nr_matches = 0; |
| 862 | struct subfile *prevsub; |
| 863 | struct subfile *mainsub_alias = NULL; |
| 864 | struct subfile *prev_mainsub_alias = NULL; |
| 865 | |
| 866 | prevsub = NULL; |
| 867 | for (subfile = subfiles; |
| 868 | /* Stop before we get to the last one. */ |
| 869 | subfile->next; |
| 870 | subfile = subfile->next) |
| 871 | { |
| 872 | if (strcmp (lbasename (subfile->name), mainbase) == 0) |
| 873 | { |
| 874 | ++nr_matches; |
| 875 | mainsub_alias = subfile; |
| 876 | prev_mainsub_alias = prevsub; |
| 877 | } |
| 878 | prevsub = subfile; |
| 879 | } |
| 880 | |
| 881 | if (nr_matches == 1) |
| 882 | { |
| 883 | gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub); |
| 884 | |
| 885 | /* Found a match for the main source file. |
| 886 | Copy its line_vector and symtab to the main subfile |
| 887 | and then discard it. */ |
| 888 | |
| 889 | mainsub->line_vector = mainsub_alias->line_vector; |
| 890 | mainsub->line_vector_length = mainsub_alias->line_vector_length; |
| 891 | mainsub->symtab = mainsub_alias->symtab; |
| 892 | |
| 893 | if (prev_mainsub_alias == NULL) |
| 894 | subfiles = mainsub_alias->next; |
| 895 | else |
| 896 | prev_mainsub_alias->next = mainsub_alias->next; |
| 897 | xfree (mainsub_alias); |
| 898 | } |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /* Helper function for qsort. Parametes are `struct block *' pointers, |
| 903 | function sorts them in descending order by their BLOCK_START. */ |
| 904 | |
| 905 | static int |
| 906 | block_compar (const void *ap, const void *bp) |
| 907 | { |
| 908 | const struct block *a = *(const struct block **) ap; |
| 909 | const struct block *b = *(const struct block **) bp; |
| 910 | |
| 911 | return ((BLOCK_START (b) > BLOCK_START (a)) |
| 912 | - (BLOCK_START (b) < BLOCK_START (a))); |
| 913 | } |
| 914 | |
| 915 | /* Finish the symbol definitions for one main source file, close off |
| 916 | all the lexical contexts for that file (creating struct block's for |
| 917 | them), then make the struct symtab for that file and put it in the |
| 918 | list of all such. |
| 919 | |
| 920 | END_ADDR is the address of the end of the file's text. SECTION is |
| 921 | the section number (in objfile->section_offsets) of the blockvector |
| 922 | and linetable. |
| 923 | |
| 924 | Note that it is possible for end_symtab() to return NULL. In |
| 925 | particular, for the DWARF case at least, it will return NULL when |
| 926 | it finds a compilation unit that has exactly one DIE, a |
| 927 | TAG_compile_unit DIE. This can happen when we link in an object |
| 928 | file that was compiled from an empty source file. Returning NULL |
| 929 | is probably not the correct thing to do, because then gdb will |
| 930 | never know about this empty file (FIXME). */ |
| 931 | |
| 932 | struct symtab * |
| 933 | end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section) |
| 934 | { |
| 935 | struct symtab *symtab = NULL; |
| 936 | struct blockvector *blockvector; |
| 937 | struct subfile *subfile; |
| 938 | struct context_stack *cstk; |
| 939 | struct subfile *nextsub; |
| 940 | |
| 941 | /* Finish the lexical context of the last function in the file; pop |
| 942 | the context stack. */ |
| 943 | |
| 944 | if (context_stack_depth > 0) |
| 945 | { |
| 946 | cstk = pop_context (); |
| 947 | /* Make a block for the local symbols within. */ |
| 948 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, |
| 949 | cstk->start_addr, end_addr, objfile); |
| 950 | |
| 951 | if (context_stack_depth > 0) |
| 952 | { |
| 953 | /* This is said to happen with SCO. The old coffread.c |
| 954 | code simply emptied the context stack, so we do the |
| 955 | same. FIXME: Find out why it is happening. This is not |
| 956 | believed to happen in most cases (even for coffread.c); |
| 957 | it used to be an abort(). */ |
| 958 | complaint (&symfile_complaints, |
| 959 | _("Context stack not empty in end_symtab")); |
| 960 | context_stack_depth = 0; |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | /* Reordered executables may have out of order pending blocks; if |
| 965 | OBJF_REORDERED is true, then sort the pending blocks. */ |
| 966 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) |
| 967 | { |
| 968 | unsigned count = 0; |
| 969 | struct pending_block *pb; |
| 970 | struct block **barray, **bp; |
| 971 | struct cleanup *back_to; |
| 972 | |
| 973 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
| 974 | count++; |
| 975 | |
| 976 | barray = xmalloc (sizeof (*barray) * count); |
| 977 | back_to = make_cleanup (xfree, barray); |
| 978 | |
| 979 | bp = barray; |
| 980 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
| 981 | *bp++ = pb->block; |
| 982 | |
| 983 | qsort (barray, count, sizeof (*barray), block_compar); |
| 984 | |
| 985 | bp = barray; |
| 986 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
| 987 | pb->block = *bp++; |
| 988 | |
| 989 | do_cleanups (back_to); |
| 990 | } |
| 991 | |
| 992 | /* Cleanup any undefined types that have been left hanging around |
| 993 | (this needs to be done before the finish_blocks so that |
| 994 | file_symbols is still good). |
| 995 | |
| 996 | Both cleanup_undefined_types and finish_global_stabs are stabs |
| 997 | specific, but harmless for other symbol readers, since on gdb |
| 998 | startup or when finished reading stabs, the state is set so these |
| 999 | are no-ops. FIXME: Is this handled right in case of QUIT? Can |
| 1000 | we make this cleaner? */ |
| 1001 | |
| 1002 | cleanup_undefined_types (objfile); |
| 1003 | finish_global_stabs (objfile); |
| 1004 | |
| 1005 | if (pending_blocks == NULL |
| 1006 | && file_symbols == NULL |
| 1007 | && global_symbols == NULL |
| 1008 | && have_line_numbers == 0 |
| 1009 | && pending_macros == NULL) |
| 1010 | { |
| 1011 | /* Ignore symtabs that have no functions with real debugging |
| 1012 | info. */ |
| 1013 | blockvector = NULL; |
| 1014 | } |
| 1015 | else |
| 1016 | { |
| 1017 | /* Define the STATIC_BLOCK & GLOBAL_BLOCK, and build the |
| 1018 | blockvector. */ |
| 1019 | finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr, |
| 1020 | objfile); |
| 1021 | finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr, |
| 1022 | objfile); |
| 1023 | blockvector = make_blockvector (objfile); |
| 1024 | } |
| 1025 | |
| 1026 | /* Read the line table if it has to be read separately. */ |
| 1027 | if (objfile->sf->sym_read_linetable != NULL) |
| 1028 | objfile->sf->sym_read_linetable (); |
| 1029 | |
| 1030 | /* Handle the case where the debug info specifies a different path |
| 1031 | for the main source file. It can cause us to lose track of its |
| 1032 | line number information. */ |
| 1033 | watch_main_source_file_lossage (); |
| 1034 | |
| 1035 | /* Now create the symtab objects proper, one for each subfile. */ |
| 1036 | /* (The main file is the last one on the chain.) */ |
| 1037 | |
| 1038 | for (subfile = subfiles; subfile; subfile = nextsub) |
| 1039 | { |
| 1040 | int linetablesize = 0; |
| 1041 | symtab = NULL; |
| 1042 | |
| 1043 | /* If we have blocks of symbols, make a symtab. Otherwise, just |
| 1044 | ignore this file and any line number info in it. */ |
| 1045 | if (blockvector) |
| 1046 | { |
| 1047 | if (subfile->line_vector) |
| 1048 | { |
| 1049 | linetablesize = sizeof (struct linetable) + |
| 1050 | subfile->line_vector->nitems * sizeof (struct linetable_entry); |
| 1051 | |
| 1052 | /* Like the pending blocks, the line table may be |
| 1053 | scrambled in reordered executables. Sort it if |
| 1054 | OBJF_REORDERED is true. */ |
| 1055 | if (objfile->flags & OBJF_REORDERED) |
| 1056 | qsort (subfile->line_vector->item, |
| 1057 | subfile->line_vector->nitems, |
| 1058 | sizeof (struct linetable_entry), compare_line_numbers); |
| 1059 | } |
| 1060 | |
| 1061 | /* Now, allocate a symbol table. */ |
| 1062 | if (subfile->symtab == NULL) |
| 1063 | symtab = allocate_symtab (subfile->name, objfile); |
| 1064 | else |
| 1065 | symtab = subfile->symtab; |
| 1066 | |
| 1067 | /* Fill in its components. */ |
| 1068 | symtab->blockvector = blockvector; |
| 1069 | symtab->macro_table = pending_macros; |
| 1070 | if (subfile->line_vector) |
| 1071 | { |
| 1072 | /* Reallocate the line table on the symbol obstack */ |
| 1073 | symtab->linetable = (struct linetable *) |
| 1074 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
| 1075 | memcpy (symtab->linetable, subfile->line_vector, linetablesize); |
| 1076 | } |
| 1077 | else |
| 1078 | { |
| 1079 | symtab->linetable = NULL; |
| 1080 | } |
| 1081 | symtab->block_line_section = section; |
| 1082 | if (subfile->dirname) |
| 1083 | { |
| 1084 | /* Reallocate the dirname on the symbol obstack */ |
| 1085 | symtab->dirname = (char *) |
| 1086 | obstack_alloc (&objfile->objfile_obstack, |
| 1087 | strlen (subfile->dirname) + 1); |
| 1088 | strcpy (symtab->dirname, subfile->dirname); |
| 1089 | } |
| 1090 | else |
| 1091 | { |
| 1092 | symtab->dirname = NULL; |
| 1093 | } |
| 1094 | symtab->free_code = free_linetable; |
| 1095 | symtab->free_func = NULL; |
| 1096 | |
| 1097 | /* Use whatever language we have been using for this |
| 1098 | subfile, not the one that was deduced in allocate_symtab |
| 1099 | from the filename. We already did our own deducing when |
| 1100 | we created the subfile, and we may have altered our |
| 1101 | opinion of what language it is from things we found in |
| 1102 | the symbols. */ |
| 1103 | symtab->language = subfile->language; |
| 1104 | |
| 1105 | /* Save the debug format string (if any) in the symtab */ |
| 1106 | if (subfile->debugformat != NULL) |
| 1107 | { |
| 1108 | symtab->debugformat = obsavestring (subfile->debugformat, |
| 1109 | strlen (subfile->debugformat), |
| 1110 | &objfile->objfile_obstack); |
| 1111 | } |
| 1112 | |
| 1113 | /* Similarly for the producer. */ |
| 1114 | if (subfile->producer != NULL) |
| 1115 | symtab->producer = obsavestring (subfile->producer, |
| 1116 | strlen (subfile->producer), |
| 1117 | &objfile->objfile_obstack); |
| 1118 | |
| 1119 | /* All symtabs for the main file and the subfiles share a |
| 1120 | blockvector, so we need to clear primary for everything |
| 1121 | but the main file. */ |
| 1122 | |
| 1123 | symtab->primary = 0; |
| 1124 | } |
| 1125 | else |
| 1126 | { |
| 1127 | if (subfile->symtab) |
| 1128 | { |
| 1129 | /* Since we are ignoring that subfile, we also need |
| 1130 | to unlink the associated empty symtab that we created. |
| 1131 | Otherwise, we can into trouble because various parts |
| 1132 | such as the block-vector are uninitialized whereas |
| 1133 | the rest of the code assumes that they are. |
| 1134 | |
| 1135 | We can only unlink the symtab because it was allocated |
| 1136 | on the objfile obstack. */ |
| 1137 | struct symtab *s; |
| 1138 | |
| 1139 | if (objfile->symtabs == subfile->symtab) |
| 1140 | objfile->symtabs = objfile->symtabs->next; |
| 1141 | else |
| 1142 | ALL_OBJFILE_SYMTABS (objfile, s) |
| 1143 | if (s->next == subfile->symtab) |
| 1144 | { |
| 1145 | s->next = s->next->next; |
| 1146 | break; |
| 1147 | } |
| 1148 | subfile->symtab = NULL; |
| 1149 | } |
| 1150 | } |
| 1151 | if (subfile->name != NULL) |
| 1152 | { |
| 1153 | xfree ((void *) subfile->name); |
| 1154 | } |
| 1155 | if (subfile->dirname != NULL) |
| 1156 | { |
| 1157 | xfree ((void *) subfile->dirname); |
| 1158 | } |
| 1159 | if (subfile->line_vector != NULL) |
| 1160 | { |
| 1161 | xfree ((void *) subfile->line_vector); |
| 1162 | } |
| 1163 | if (subfile->debugformat != NULL) |
| 1164 | { |
| 1165 | xfree ((void *) subfile->debugformat); |
| 1166 | } |
| 1167 | if (subfile->producer != NULL) |
| 1168 | xfree (subfile->producer); |
| 1169 | |
| 1170 | nextsub = subfile->next; |
| 1171 | xfree ((void *) subfile); |
| 1172 | } |
| 1173 | |
| 1174 | /* Set this for the main source file. */ |
| 1175 | if (symtab) |
| 1176 | { |
| 1177 | symtab->primary = 1; |
| 1178 | } |
| 1179 | |
| 1180 | /* Default any symbols without a specified symtab to the primary |
| 1181 | symtab. */ |
| 1182 | if (blockvector) |
| 1183 | { |
| 1184 | int block_i; |
| 1185 | |
| 1186 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) |
| 1187 | { |
| 1188 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); |
| 1189 | struct symbol *sym; |
| 1190 | struct dict_iterator iter; |
| 1191 | |
| 1192 | /* Inlined functions may have symbols not in the global or static |
| 1193 | symbol lists. */ |
| 1194 | if (BLOCK_FUNCTION (block) != NULL) |
| 1195 | if (SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) == NULL) |
| 1196 | SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) = symtab; |
| 1197 | |
| 1198 | for (sym = dict_iterator_first (BLOCK_DICT (block), &iter); |
| 1199 | sym != NULL; |
| 1200 | sym = dict_iterator_next (&iter)) |
| 1201 | if (SYMBOL_SYMTAB (sym) == NULL) |
| 1202 | SYMBOL_SYMTAB (sym) = symtab; |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | last_source_file = NULL; |
| 1207 | current_subfile = NULL; |
| 1208 | pending_macros = NULL; |
| 1209 | if (pending_addrmap) |
| 1210 | { |
| 1211 | obstack_free (&pending_addrmap_obstack, NULL); |
| 1212 | pending_addrmap = NULL; |
| 1213 | } |
| 1214 | |
| 1215 | return symtab; |
| 1216 | } |
| 1217 | |
| 1218 | /* Push a context block. Args are an identifying nesting level |
| 1219 | (checkable when you pop it), and the starting PC address of this |
| 1220 | context. */ |
| 1221 | |
| 1222 | struct context_stack * |
| 1223 | push_context (int desc, CORE_ADDR valu) |
| 1224 | { |
| 1225 | struct context_stack *new; |
| 1226 | |
| 1227 | if (context_stack_depth == context_stack_size) |
| 1228 | { |
| 1229 | context_stack_size *= 2; |
| 1230 | context_stack = (struct context_stack *) |
| 1231 | xrealloc ((char *) context_stack, |
| 1232 | (context_stack_size * sizeof (struct context_stack))); |
| 1233 | } |
| 1234 | |
| 1235 | new = &context_stack[context_stack_depth++]; |
| 1236 | new->depth = desc; |
| 1237 | new->locals = local_symbols; |
| 1238 | new->params = param_symbols; |
| 1239 | new->old_blocks = pending_blocks; |
| 1240 | new->start_addr = valu; |
| 1241 | new->using_directives = using_directives; |
| 1242 | new->name = NULL; |
| 1243 | |
| 1244 | local_symbols = NULL; |
| 1245 | param_symbols = NULL; |
| 1246 | using_directives = NULL; |
| 1247 | |
| 1248 | return new; |
| 1249 | } |
| 1250 | |
| 1251 | /* Pop a context block. Returns the address of the context block just |
| 1252 | popped. */ |
| 1253 | |
| 1254 | struct context_stack * |
| 1255 | pop_context (void) |
| 1256 | { |
| 1257 | gdb_assert (context_stack_depth > 0); |
| 1258 | return (&context_stack[--context_stack_depth]); |
| 1259 | } |
| 1260 | |
| 1261 | \f |
| 1262 | |
| 1263 | /* Compute a small integer hash code for the given name. */ |
| 1264 | |
| 1265 | int |
| 1266 | hashname (char *name) |
| 1267 | { |
| 1268 | return (hash(name,strlen(name)) % HASHSIZE); |
| 1269 | } |
| 1270 | \f |
| 1271 | |
| 1272 | void |
| 1273 | record_debugformat (char *format) |
| 1274 | { |
| 1275 | current_subfile->debugformat = xstrdup (format); |
| 1276 | } |
| 1277 | |
| 1278 | void |
| 1279 | record_producer (const char *producer) |
| 1280 | { |
| 1281 | /* The producer is not always provided in the debugging info. |
| 1282 | Do nothing if PRODUCER is NULL. */ |
| 1283 | if (producer == NULL) |
| 1284 | return; |
| 1285 | |
| 1286 | current_subfile->producer = xstrdup (producer); |
| 1287 | } |
| 1288 | |
| 1289 | /* Merge the first symbol list SRCLIST into the second symbol list |
| 1290 | TARGETLIST by repeated calls to add_symbol_to_list(). This |
| 1291 | procedure "frees" each link of SRCLIST by adding it to the |
| 1292 | free_pendings list. Caller must set SRCLIST to a null list after |
| 1293 | calling this function. |
| 1294 | |
| 1295 | Void return. */ |
| 1296 | |
| 1297 | void |
| 1298 | merge_symbol_lists (struct pending **srclist, struct pending **targetlist) |
| 1299 | { |
| 1300 | int i; |
| 1301 | |
| 1302 | if (!srclist || !*srclist) |
| 1303 | return; |
| 1304 | |
| 1305 | /* Merge in elements from current link. */ |
| 1306 | for (i = 0; i < (*srclist)->nsyms; i++) |
| 1307 | add_symbol_to_list ((*srclist)->symbol[i], targetlist); |
| 1308 | |
| 1309 | /* Recurse on next. */ |
| 1310 | merge_symbol_lists (&(*srclist)->next, targetlist); |
| 1311 | |
| 1312 | /* "Free" the current link. */ |
| 1313 | (*srclist)->next = free_pendings; |
| 1314 | free_pendings = (*srclist); |
| 1315 | } |
| 1316 | \f |
| 1317 | /* Initialize anything that needs initializing when starting to read a |
| 1318 | fresh piece of a symbol file, e.g. reading in the stuff |
| 1319 | corresponding to a psymtab. */ |
| 1320 | |
| 1321 | void |
| 1322 | buildsym_init (void) |
| 1323 | { |
| 1324 | free_pendings = NULL; |
| 1325 | file_symbols = NULL; |
| 1326 | global_symbols = NULL; |
| 1327 | pending_blocks = NULL; |
| 1328 | pending_macros = NULL; |
| 1329 | |
| 1330 | /* We shouldn't have any address map at this point. */ |
| 1331 | gdb_assert (! pending_addrmap); |
| 1332 | pending_addrmap_interesting = 0; |
| 1333 | } |
| 1334 | |
| 1335 | /* Initialize anything that needs initializing when a completely new |
| 1336 | symbol file is specified (not just adding some symbols from another |
| 1337 | file, e.g. a shared library). */ |
| 1338 | |
| 1339 | void |
| 1340 | buildsym_new_init (void) |
| 1341 | { |
| 1342 | buildsym_init (); |
| 1343 | } |