| 1 | // readsyms.cc -- read input file symbols for gold |
| 2 | |
| 3 | // Copyright (C) 2006-2019 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 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, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <cstring> |
| 26 | |
| 27 | #include "elfcpp.h" |
| 28 | #include "options.h" |
| 29 | #include "dirsearch.h" |
| 30 | #include "symtab.h" |
| 31 | #include "object.h" |
| 32 | #include "archive.h" |
| 33 | #include "script.h" |
| 34 | #include "readsyms.h" |
| 35 | #include "plugin.h" |
| 36 | #include "layout.h" |
| 37 | #include "incremental.h" |
| 38 | |
| 39 | namespace gold |
| 40 | { |
| 41 | |
| 42 | // If we fail to open the object, then we won't create an Add_symbols |
| 43 | // task. However, we still need to unblock the token, or else the |
| 44 | // link won't proceed to generate more error messages. We can only |
| 45 | // unblock tokens when the workqueue lock is held, so we need a dummy |
| 46 | // task to do that. The dummy task has to maintain the right sequence |
| 47 | // of blocks, so we need both this_blocker and next_blocker. |
| 48 | |
| 49 | class Unblock_token : public Task |
| 50 | { |
| 51 | public: |
| 52 | Unblock_token(Task_token* this_blocker, Task_token* next_blocker) |
| 53 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
| 54 | { } |
| 55 | |
| 56 | ~Unblock_token() |
| 57 | { |
| 58 | if (this->this_blocker_ != NULL) |
| 59 | delete this->this_blocker_; |
| 60 | } |
| 61 | |
| 62 | Task_token* |
| 63 | is_runnable() |
| 64 | { |
| 65 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 66 | return this->this_blocker_; |
| 67 | return NULL; |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | locks(Task_locker* tl) |
| 72 | { tl->add(this, this->next_blocker_); } |
| 73 | |
| 74 | void |
| 75 | run(Workqueue*) |
| 76 | { } |
| 77 | |
| 78 | std::string |
| 79 | get_name() const |
| 80 | { return "Unblock_token"; } |
| 81 | |
| 82 | private: |
| 83 | Task_token* this_blocker_; |
| 84 | Task_token* next_blocker_; |
| 85 | }; |
| 86 | |
| 87 | // Class read_symbols. |
| 88 | |
| 89 | Read_symbols::~Read_symbols() |
| 90 | { |
| 91 | // The this_blocker_ and next_blocker_ pointers are passed on to the |
| 92 | // Add_symbols task. |
| 93 | } |
| 94 | |
| 95 | // If appropriate, issue a warning about skipping an incompatible |
| 96 | // file. |
| 97 | |
| 98 | void |
| 99 | Read_symbols::incompatible_warning(const Input_argument* input_argument, |
| 100 | const Input_file* input_file) |
| 101 | { |
| 102 | if (parameters->options().warn_search_mismatch()) |
| 103 | gold_warning("skipping incompatible %s while searching for %s", |
| 104 | input_file->filename().c_str(), |
| 105 | input_argument->file().name()); |
| 106 | } |
| 107 | |
| 108 | // Requeue a Read_symbols task to search for the next object with the |
| 109 | // same name. |
| 110 | |
| 111 | void |
| 112 | Read_symbols::requeue(Workqueue* workqueue, Input_objects* input_objects, |
| 113 | Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, |
| 114 | int dirindex, Mapfile* mapfile, |
| 115 | const Input_argument* input_argument, |
| 116 | Input_group* input_group, Task_token* next_blocker) |
| 117 | { |
| 118 | // Bump the directory search index. |
| 119 | ++dirindex; |
| 120 | |
| 121 | // We don't need to worry about this_blocker, since we already |
| 122 | // reached it. However, we are removing the blocker on next_blocker |
| 123 | // because the calling task is completing. So we need to add a new |
| 124 | // blocker. Since next_blocker may be shared by several tasks, we |
| 125 | // need to increment the count with the workqueue lock held. |
| 126 | workqueue->add_blocker(next_blocker); |
| 127 | |
| 128 | workqueue->queue(new Read_symbols(input_objects, symtab, layout, dirpath, |
| 129 | dirindex, mapfile, input_argument, |
| 130 | input_group, NULL, NULL, next_blocker)); |
| 131 | } |
| 132 | |
| 133 | // Return whether a Read_symbols task is runnable. We can read an |
| 134 | // ordinary input file immediately. For an archive specified using |
| 135 | // -l, we have to wait until the search path is complete. |
| 136 | |
| 137 | Task_token* |
| 138 | Read_symbols::is_runnable() |
| 139 | { |
| 140 | if (this->input_argument_->is_file() |
| 141 | && this->input_argument_->file().may_need_search() |
| 142 | && this->dirpath_->token()->is_blocked()) |
| 143 | return this->dirpath_->token(); |
| 144 | |
| 145 | return NULL; |
| 146 | } |
| 147 | |
| 148 | // Return a Task_locker for a Read_symbols task. We don't need any |
| 149 | // locks here. |
| 150 | |
| 151 | void |
| 152 | Read_symbols::locks(Task_locker* tl) |
| 153 | { |
| 154 | if (this->member_ != NULL) |
| 155 | tl->add(this, this->next_blocker_); |
| 156 | } |
| 157 | |
| 158 | // Run a Read_symbols task. |
| 159 | |
| 160 | void |
| 161 | Read_symbols::run(Workqueue* workqueue) |
| 162 | { |
| 163 | // If we didn't queue a new task, then we need to explicitly unblock |
| 164 | // the token. If the object is a member of a lib group, however, |
| 165 | // the token was already added to the list of locks for the task, |
| 166 | // and it will be unblocked automatically at the end of the task. |
| 167 | if (!this->do_read_symbols(workqueue) && this->member_ == NULL) |
| 168 | workqueue->queue_soon(new Unblock_token(this->this_blocker_, |
| 169 | this->next_blocker_)); |
| 170 | } |
| 171 | |
| 172 | // Handle a whole lib group. Other than collecting statistics, this just |
| 173 | // mimics what we do for regular object files in the command line. |
| 174 | |
| 175 | bool |
| 176 | Read_symbols::do_whole_lib_group(Workqueue* workqueue) |
| 177 | { |
| 178 | const Input_file_lib* lib_group = this->input_argument_->lib(); |
| 179 | |
| 180 | ++Lib_group::total_lib_groups; |
| 181 | |
| 182 | Task_token* this_blocker = this->this_blocker_; |
| 183 | for (Input_file_lib::const_iterator i = lib_group->begin(); |
| 184 | i != lib_group->end(); |
| 185 | ++i) |
| 186 | { |
| 187 | ++Lib_group::total_members; |
| 188 | ++Lib_group::total_members_loaded; |
| 189 | |
| 190 | const Input_argument* arg = &*i; |
| 191 | |
| 192 | Task_token* next_blocker; |
| 193 | if (i != lib_group->end() - 1) |
| 194 | { |
| 195 | next_blocker = new Task_token(true); |
| 196 | next_blocker->add_blocker(); |
| 197 | } |
| 198 | else |
| 199 | next_blocker = this->next_blocker_; |
| 200 | |
| 201 | workqueue->queue_soon(new Read_symbols(this->input_objects_, |
| 202 | this->symtab_, this->layout_, |
| 203 | this->dirpath_, this->dirindex_, |
| 204 | this->mapfile_, arg, NULL, |
| 205 | NULL, this_blocker, next_blocker)); |
| 206 | this_blocker = next_blocker; |
| 207 | } |
| 208 | |
| 209 | return true; |
| 210 | } |
| 211 | |
| 212 | // Handle a lib group. We set Read_symbols Tasks as usual, but have them |
| 213 | // just record the symbol data instead of adding the objects. We also start |
| 214 | // a Add_lib_group_symbols Task which runs after we've read all the symbols. |
| 215 | // In that task we process the members in a loop until we are done. |
| 216 | |
| 217 | bool |
| 218 | Read_symbols::do_lib_group(Workqueue* workqueue) |
| 219 | { |
| 220 | const Input_file_lib* lib_group = this->input_argument_->lib(); |
| 221 | |
| 222 | if (lib_group->options().whole_archive()) |
| 223 | return this->do_whole_lib_group(workqueue); |
| 224 | |
| 225 | Lib_group* lib = new Lib_group(lib_group, this); |
| 226 | |
| 227 | Add_lib_group_symbols* add_lib_group_symbols = |
| 228 | new Add_lib_group_symbols(this->symtab_, this->layout_, |
| 229 | this->input_objects_, |
| 230 | lib, this->next_blocker_); |
| 231 | |
| 232 | |
| 233 | Task_token* next_blocker = new Task_token(true); |
| 234 | int j = 0; |
| 235 | for (Input_file_lib::const_iterator i = lib_group->begin(); |
| 236 | i != lib_group->end(); |
| 237 | ++i, ++j) |
| 238 | { |
| 239 | const Input_argument* arg = &*i; |
| 240 | Archive_member* m = lib->get_member(j); |
| 241 | |
| 242 | next_blocker->add_blocker(); |
| 243 | |
| 244 | // Since this Read_symbols will not create an Add_symbols, |
| 245 | // just pass NULL as this_blocker. |
| 246 | workqueue->queue_soon(new Read_symbols(this->input_objects_, |
| 247 | this->symtab_, this->layout_, |
| 248 | this->dirpath_, this->dirindex_, |
| 249 | this->mapfile_, arg, NULL, |
| 250 | m, NULL, next_blocker)); |
| 251 | } |
| 252 | |
| 253 | add_lib_group_symbols->set_blocker(next_blocker, this->this_blocker_); |
| 254 | workqueue->queue_soon(add_lib_group_symbols); |
| 255 | |
| 256 | return true; |
| 257 | } |
| 258 | |
| 259 | // Open the file and read the symbols. Return true if a new task was |
| 260 | // queued, false if that could not happen due to some error. |
| 261 | |
| 262 | bool |
| 263 | Read_symbols::do_read_symbols(Workqueue* workqueue) |
| 264 | { |
| 265 | if (this->input_argument_->is_group()) |
| 266 | { |
| 267 | gold_assert(this->input_group_ == NULL); |
| 268 | this->do_group(workqueue); |
| 269 | return true; |
| 270 | } |
| 271 | |
| 272 | if (this->input_argument_->is_lib()) |
| 273 | return this->do_lib_group(workqueue); |
| 274 | |
| 275 | Input_file* input_file = new Input_file(&this->input_argument_->file()); |
| 276 | if (!input_file->open(*this->dirpath_, this, &this->dirindex_)) |
| 277 | return false; |
| 278 | |
| 279 | // Read enough of the file to pick up the entire ELF header. |
| 280 | |
| 281 | off_t filesize = input_file->file().filesize(); |
| 282 | |
| 283 | if (filesize == 0) |
| 284 | { |
| 285 | gold_error(_("%s: file is empty"), |
| 286 | input_file->file().filename().c_str()); |
| 287 | return false; |
| 288 | } |
| 289 | |
| 290 | const unsigned char* ehdr; |
| 291 | int read_size; |
| 292 | bool is_elf = is_elf_object(input_file, 0, &ehdr, &read_size); |
| 293 | |
| 294 | if (read_size >= Archive::sarmag) |
| 295 | { |
| 296 | bool is_thin_archive |
| 297 | = memcmp(ehdr, Archive::armagt, Archive::sarmag) == 0; |
| 298 | if (is_thin_archive |
| 299 | || memcmp(ehdr, Archive::armag, Archive::sarmag) == 0) |
| 300 | { |
| 301 | // This is an archive. |
| 302 | Archive* arch = new Archive(this->input_argument_->file().name(), |
| 303 | input_file, is_thin_archive, |
| 304 | this->dirpath_, this); |
| 305 | arch->setup(); |
| 306 | |
| 307 | // Unlock the archive so it can be used in the next task. |
| 308 | arch->unlock(this); |
| 309 | |
| 310 | workqueue->queue_next(new Add_archive_symbols(this->symtab_, |
| 311 | this->layout_, |
| 312 | this->input_objects_, |
| 313 | this->dirpath_, |
| 314 | this->dirindex_, |
| 315 | this->mapfile_, |
| 316 | this->input_argument_, |
| 317 | arch, |
| 318 | this->input_group_, |
| 319 | this->this_blocker_, |
| 320 | this->next_blocker_)); |
| 321 | return true; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | Object* elf_obj = NULL; |
| 326 | bool unconfigured; |
| 327 | bool* punconfigured = NULL; |
| 328 | if (is_elf) |
| 329 | { |
| 330 | // This is an ELF object. |
| 331 | |
| 332 | unconfigured = false; |
| 333 | punconfigured = (input_file->will_search_for() |
| 334 | ? &unconfigured |
| 335 | : NULL); |
| 336 | elf_obj = make_elf_object(input_file->filename(), |
| 337 | input_file, 0, ehdr, read_size, |
| 338 | punconfigured); |
| 339 | } |
| 340 | |
| 341 | if (parameters->options().has_plugins()) |
| 342 | { |
| 343 | Pluginobj* obj = parameters->options().plugins()->claim_file(input_file, |
| 344 | 0, filesize, |
| 345 | elf_obj); |
| 346 | if (obj != NULL) |
| 347 | { |
| 348 | // Delete the elf_obj, this file has been claimed. |
| 349 | if (elf_obj != NULL) |
| 350 | delete elf_obj; |
| 351 | |
| 352 | // The input file was claimed by a plugin, and its symbols |
| 353 | // have been provided by the plugin. |
| 354 | |
| 355 | // We are done with the file at this point, so unlock it. |
| 356 | obj->unlock(this); |
| 357 | |
| 358 | if (this->member_ != NULL) |
| 359 | { |
| 360 | this->member_->sd_ = NULL; |
| 361 | this->member_->obj_ = obj; |
| 362 | return true; |
| 363 | } |
| 364 | |
| 365 | workqueue->queue_next(new Add_symbols(this->input_objects_, |
| 366 | this->symtab_, |
| 367 | this->layout_, |
| 368 | this->dirpath_, |
| 369 | this->dirindex_, |
| 370 | this->mapfile_, |
| 371 | this->input_argument_, |
| 372 | obj, |
| 373 | NULL, |
| 374 | NULL, |
| 375 | this->this_blocker_, |
| 376 | this->next_blocker_)); |
| 377 | return true; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | if (is_elf) |
| 382 | { |
| 383 | // This is an ELF object. |
| 384 | |
| 385 | if (elf_obj == NULL) |
| 386 | { |
| 387 | if (unconfigured) |
| 388 | { |
| 389 | Read_symbols::incompatible_warning(this->input_argument_, |
| 390 | input_file); |
| 391 | input_file->file().release(); |
| 392 | input_file->file().unlock(this); |
| 393 | delete input_file; |
| 394 | ++this->dirindex_; |
| 395 | return this->do_read_symbols(workqueue); |
| 396 | } |
| 397 | return false; |
| 398 | } |
| 399 | |
| 400 | Read_symbols_data* sd = new Read_symbols_data; |
| 401 | elf_obj->read_symbols(sd); |
| 402 | |
| 403 | // Opening the file locked it, so now we need to unlock it. We |
| 404 | // need to unlock it before queuing the Add_symbols task, |
| 405 | // because the workqueue doesn't know about our lock on the |
| 406 | // file. If we queue the Add_symbols task first, it will be |
| 407 | // stuck on the end of the file lock, but since the workqueue |
| 408 | // doesn't know about that lock, it will never release the |
| 409 | // Add_symbols task. |
| 410 | |
| 411 | input_file->file().unlock(this); |
| 412 | |
| 413 | if (this->member_ != NULL) |
| 414 | { |
| 415 | this->member_->sd_ = sd; |
| 416 | this->member_->obj_ = elf_obj; |
| 417 | this->member_->arg_serial_ = |
| 418 | this->input_argument_->file().arg_serial(); |
| 419 | return true; |
| 420 | } |
| 421 | |
| 422 | // We use queue_next because everything is cached for this |
| 423 | // task to run right away if possible. |
| 424 | |
| 425 | workqueue->queue_next(new Add_symbols(this->input_objects_, |
| 426 | this->symtab_, this->layout_, |
| 427 | this->dirpath_, |
| 428 | this->dirindex_, |
| 429 | this->mapfile_, |
| 430 | this->input_argument_, |
| 431 | elf_obj, |
| 432 | NULL, |
| 433 | sd, |
| 434 | this->this_blocker_, |
| 435 | this->next_blocker_)); |
| 436 | |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | // Queue up a task to try to parse this file as a script. We use a |
| 441 | // separate task so that the script will be read in order with other |
| 442 | // objects named on the command line. Also so that we don't try to |
| 443 | // read multiple scripts simultaneously, which could lead to |
| 444 | // unpredictable changes to the General_options structure. |
| 445 | |
| 446 | workqueue->queue_soon(new Read_script(this->symtab_, |
| 447 | this->layout_, |
| 448 | this->dirpath_, |
| 449 | this->dirindex_, |
| 450 | this->input_objects_, |
| 451 | this->mapfile_, |
| 452 | this->input_group_, |
| 453 | this->input_argument_, |
| 454 | input_file, |
| 455 | this->this_blocker_, |
| 456 | this->next_blocker_)); |
| 457 | return true; |
| 458 | } |
| 459 | |
| 460 | // Handle a group. We need to walk through the arguments over and |
| 461 | // over until we don't see any new undefined symbols. We do this by |
| 462 | // setting off Read_symbols Tasks as usual, but recording the archive |
| 463 | // entries instead of deleting them. We also start a Finish_group |
| 464 | // Task which runs after we've read all the symbols. In that task we |
| 465 | // process the archives in a loop until we are done. |
| 466 | |
| 467 | void |
| 468 | Read_symbols::do_group(Workqueue* workqueue) |
| 469 | { |
| 470 | Input_group* input_group = new Input_group(); |
| 471 | |
| 472 | const Input_file_group* group = this->input_argument_->group(); |
| 473 | Task_token* this_blocker = this->this_blocker_; |
| 474 | |
| 475 | Finish_group* finish_group = new Finish_group(this->input_objects_, |
| 476 | this->symtab_, |
| 477 | this->layout_, |
| 478 | this->mapfile_, |
| 479 | input_group, |
| 480 | this->next_blocker_); |
| 481 | |
| 482 | Task_token* next_blocker = new Task_token(true); |
| 483 | next_blocker->add_blocker(); |
| 484 | workqueue->queue_soon(new Start_group(this->symtab_, finish_group, |
| 485 | this_blocker, next_blocker)); |
| 486 | this_blocker = next_blocker; |
| 487 | |
| 488 | for (Input_file_group::const_iterator p = group->begin(); |
| 489 | p != group->end(); |
| 490 | ++p) |
| 491 | { |
| 492 | const Input_argument* arg = &*p; |
| 493 | gold_assert(arg->is_file()); |
| 494 | |
| 495 | next_blocker = new Task_token(true); |
| 496 | next_blocker->add_blocker(); |
| 497 | workqueue->queue_soon(new Read_symbols(this->input_objects_, |
| 498 | this->symtab_, this->layout_, |
| 499 | this->dirpath_, this->dirindex_, |
| 500 | this->mapfile_, arg, input_group, |
| 501 | NULL, this_blocker, next_blocker)); |
| 502 | this_blocker = next_blocker; |
| 503 | } |
| 504 | |
| 505 | finish_group->set_blocker(this_blocker); |
| 506 | |
| 507 | workqueue->queue_soon(finish_group); |
| 508 | } |
| 509 | |
| 510 | // Return a debugging name for a Read_symbols task. |
| 511 | |
| 512 | std::string |
| 513 | Read_symbols::get_name() const |
| 514 | { |
| 515 | if (this->input_argument_->is_group()) |
| 516 | { |
| 517 | std::string ret("Read_symbols group ("); |
| 518 | bool add_space = false; |
| 519 | const Input_file_group* group = this->input_argument_->group(); |
| 520 | for (Input_file_group::const_iterator p = group->begin(); |
| 521 | p != group->end(); |
| 522 | ++p) |
| 523 | { |
| 524 | if (add_space) |
| 525 | ret += ' '; |
| 526 | ret += p->file().name(); |
| 527 | add_space = true; |
| 528 | } |
| 529 | return ret + ')'; |
| 530 | } |
| 531 | else if (this->input_argument_->is_lib()) |
| 532 | { |
| 533 | std::string ret("Read_symbols lib ("); |
| 534 | bool add_space = false; |
| 535 | const Input_file_lib* lib = this->input_argument_->lib(); |
| 536 | for (Input_file_lib::const_iterator p = lib->begin(); |
| 537 | p != lib->end(); |
| 538 | ++p) |
| 539 | { |
| 540 | if (add_space) |
| 541 | ret += ' '; |
| 542 | ret += p->file().name(); |
| 543 | add_space = true; |
| 544 | } |
| 545 | return ret + ')'; |
| 546 | } |
| 547 | else |
| 548 | { |
| 549 | std::string ret("Read_symbols "); |
| 550 | if (this->input_argument_->file().is_lib()) |
| 551 | ret += "-l"; |
| 552 | else if (this->input_argument_->file().is_searched_file()) |
| 553 | ret += "-l:"; |
| 554 | ret += this->input_argument_->file().name(); |
| 555 | return ret; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | // Class Add_symbols. |
| 560 | |
| 561 | Add_symbols::~Add_symbols() |
| 562 | { |
| 563 | if (this->this_blocker_ != NULL) |
| 564 | delete this->this_blocker_; |
| 565 | // next_blocker_ is deleted by the task associated with the next |
| 566 | // input file. |
| 567 | } |
| 568 | |
| 569 | // We are blocked by this_blocker_. We block next_blocker_. We also |
| 570 | // lock the file. |
| 571 | |
| 572 | Task_token* |
| 573 | Add_symbols::is_runnable() |
| 574 | { |
| 575 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 576 | return this->this_blocker_; |
| 577 | if (this->object_->is_locked()) |
| 578 | return this->object_->token(); |
| 579 | return NULL; |
| 580 | } |
| 581 | |
| 582 | void |
| 583 | Add_symbols::locks(Task_locker* tl) |
| 584 | { |
| 585 | tl->add(this, this->next_blocker_); |
| 586 | Task_token* token = this->object_->token(); |
| 587 | if (token != NULL) |
| 588 | tl->add(this, token); |
| 589 | } |
| 590 | |
| 591 | // Add the symbols in the object to the symbol table. |
| 592 | |
| 593 | void |
| 594 | Add_symbols::run(Workqueue*) |
| 595 | { |
| 596 | Pluginobj* pluginobj = this->object_->pluginobj(); |
| 597 | if (pluginobj != NULL) |
| 598 | { |
| 599 | this->object_->add_symbols(this->symtab_, this->sd_, this->layout_); |
| 600 | return; |
| 601 | } |
| 602 | |
| 603 | if (!this->input_objects_->add_object(this->object_)) |
| 604 | { |
| 605 | this->object_->discard_decompressed_sections(); |
| 606 | gold_assert(this->sd_ != NULL); |
| 607 | delete this->sd_; |
| 608 | this->sd_ = NULL; |
| 609 | this->object_->release(); |
| 610 | delete this->object_; |
| 611 | } |
| 612 | else |
| 613 | { |
| 614 | Incremental_inputs* incremental_inputs = |
| 615 | this->layout_->incremental_inputs(); |
| 616 | if (incremental_inputs != NULL) |
| 617 | { |
| 618 | if (this->library_ != NULL && !this->library_->is_reported()) |
| 619 | { |
| 620 | Incremental_binary* ibase = this->layout_->incremental_base(); |
| 621 | gold_assert(ibase != NULL); |
| 622 | unsigned int lib_serial = this->library_->arg_serial(); |
| 623 | unsigned int lib_index = this->library_->input_file_index(); |
| 624 | Script_info* lib_script_info = ibase->get_script_info(lib_index); |
| 625 | incremental_inputs->report_archive_begin(this->library_, |
| 626 | lib_serial, |
| 627 | lib_script_info); |
| 628 | } |
| 629 | unsigned int arg_serial = this->input_argument_->file().arg_serial(); |
| 630 | Script_info* script_info = this->input_argument_->script_info(); |
| 631 | incremental_inputs->report_object(this->object_, arg_serial, |
| 632 | this->library_, script_info); |
| 633 | } |
| 634 | this->object_->layout(this->symtab_, this->layout_, this->sd_); |
| 635 | this->object_->add_symbols(this->symtab_, this->sd_, this->layout_); |
| 636 | this->object_->discard_decompressed_sections(); |
| 637 | delete this->sd_; |
| 638 | this->sd_ = NULL; |
| 639 | this->object_->release(); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | // Class Read_member. |
| 644 | |
| 645 | Read_member::~Read_member() |
| 646 | { |
| 647 | if (this->this_blocker_ != NULL) |
| 648 | delete this->this_blocker_; |
| 649 | // next_blocker_ is deleted by the task associated with the next |
| 650 | // input file. |
| 651 | } |
| 652 | |
| 653 | // Return whether a Read_member task is runnable. |
| 654 | |
| 655 | Task_token* |
| 656 | Read_member::is_runnable() |
| 657 | { |
| 658 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 659 | return this->this_blocker_; |
| 660 | return NULL; |
| 661 | } |
| 662 | |
| 663 | void |
| 664 | Read_member::locks(Task_locker* tl) |
| 665 | { |
| 666 | tl->add(this, this->next_blocker_); |
| 667 | } |
| 668 | |
| 669 | // Run a Read_member task. |
| 670 | |
| 671 | void |
| 672 | Read_member::run(Workqueue*) |
| 673 | { |
| 674 | // This task doesn't need to do anything for now. The Read_symbols task |
| 675 | // that is queued for the archive library will cause the archive to be |
| 676 | // processed from scratch. |
| 677 | } |
| 678 | |
| 679 | // Class Check_script. |
| 680 | |
| 681 | Check_script::~Check_script() |
| 682 | { |
| 683 | if (this->this_blocker_ != NULL) |
| 684 | delete this->this_blocker_; |
| 685 | // next_blocker_ is deleted by the task associated with the next |
| 686 | // input file. |
| 687 | } |
| 688 | |
| 689 | // Return whether a Check_script task is runnable. |
| 690 | |
| 691 | Task_token* |
| 692 | Check_script::is_runnable() |
| 693 | { |
| 694 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 695 | return this->this_blocker_; |
| 696 | return NULL; |
| 697 | } |
| 698 | |
| 699 | void |
| 700 | Check_script::locks(Task_locker* tl) |
| 701 | { |
| 702 | tl->add(this, this->next_blocker_); |
| 703 | } |
| 704 | |
| 705 | // Run a Check_script task. |
| 706 | |
| 707 | void |
| 708 | Check_script::run(Workqueue*) |
| 709 | { |
| 710 | Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs(); |
| 711 | gold_assert(incremental_inputs != NULL); |
| 712 | unsigned int arg_serial = this->input_reader_->arg_serial(); |
| 713 | Script_info* script_info = |
| 714 | this->ibase_->get_script_info(this->input_file_index_); |
| 715 | Timespec mtime = this->input_reader_->get_mtime(); |
| 716 | incremental_inputs->report_script(script_info, arg_serial, mtime); |
| 717 | } |
| 718 | |
| 719 | // Class Check_library. |
| 720 | |
| 721 | Check_library::~Check_library() |
| 722 | { |
| 723 | if (this->this_blocker_ != NULL) |
| 724 | delete this->this_blocker_; |
| 725 | // next_blocker_ is deleted by the task associated with the next |
| 726 | // input file. |
| 727 | } |
| 728 | |
| 729 | // Return whether a Check_library task is runnable. |
| 730 | |
| 731 | Task_token* |
| 732 | Check_library::is_runnable() |
| 733 | { |
| 734 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 735 | return this->this_blocker_; |
| 736 | return NULL; |
| 737 | } |
| 738 | |
| 739 | void |
| 740 | Check_library::locks(Task_locker* tl) |
| 741 | { |
| 742 | tl->add(this, this->next_blocker_); |
| 743 | } |
| 744 | |
| 745 | // Run a Check_library task. |
| 746 | |
| 747 | void |
| 748 | Check_library::run(Workqueue*) |
| 749 | { |
| 750 | Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs(); |
| 751 | gold_assert(incremental_inputs != NULL); |
| 752 | Incremental_library* lib = this->ibase_->get_library(this->input_file_index_); |
| 753 | gold_assert(lib != NULL); |
| 754 | lib->copy_unused_symbols(); |
| 755 | // FIXME: Check that unused symbols remain unused. |
| 756 | if (!lib->is_reported()) |
| 757 | { |
| 758 | unsigned int lib_serial = lib->arg_serial(); |
| 759 | unsigned int lib_index = lib->input_file_index(); |
| 760 | Script_info* script_info = this->ibase_->get_script_info(lib_index); |
| 761 | incremental_inputs->report_archive_begin(lib, lib_serial, script_info); |
| 762 | } |
| 763 | incremental_inputs->report_archive_end(lib); |
| 764 | } |
| 765 | |
| 766 | // Class Input_group. |
| 767 | |
| 768 | // When we delete an Input_group we can delete the archive |
| 769 | // information. |
| 770 | |
| 771 | Input_group::~Input_group() |
| 772 | { |
| 773 | for (Input_group::const_iterator p = this->begin(); |
| 774 | p != this->end(); |
| 775 | ++p) |
| 776 | delete *p; |
| 777 | } |
| 778 | |
| 779 | // Class Start_group. |
| 780 | |
| 781 | Start_group::~Start_group() |
| 782 | { |
| 783 | if (this->this_blocker_ != NULL) |
| 784 | delete this->this_blocker_; |
| 785 | // next_blocker_ is deleted by the task associated with the first |
| 786 | // file in the group. |
| 787 | } |
| 788 | |
| 789 | // We need to wait for THIS_BLOCKER_ and unblock NEXT_BLOCKER_. |
| 790 | |
| 791 | Task_token* |
| 792 | Start_group::is_runnable() |
| 793 | { |
| 794 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 795 | return this->this_blocker_; |
| 796 | return NULL; |
| 797 | } |
| 798 | |
| 799 | void |
| 800 | Start_group::locks(Task_locker* tl) |
| 801 | { |
| 802 | tl->add(this, this->next_blocker_); |
| 803 | } |
| 804 | |
| 805 | // Store the number of undefined symbols we see now. |
| 806 | |
| 807 | void |
| 808 | Start_group::run(Workqueue*) |
| 809 | { |
| 810 | this->finish_group_->set_saw_undefined(this->symtab_->saw_undefined()); |
| 811 | } |
| 812 | |
| 813 | // Class Finish_group. |
| 814 | |
| 815 | Finish_group::~Finish_group() |
| 816 | { |
| 817 | if (this->this_blocker_ != NULL) |
| 818 | delete this->this_blocker_; |
| 819 | // next_blocker_ is deleted by the task associated with the next |
| 820 | // input file following the group. |
| 821 | } |
| 822 | |
| 823 | // We need to wait for THIS_BLOCKER_ and unblock NEXT_BLOCKER_. |
| 824 | |
| 825 | Task_token* |
| 826 | Finish_group::is_runnable() |
| 827 | { |
| 828 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 829 | return this->this_blocker_; |
| 830 | return NULL; |
| 831 | } |
| 832 | |
| 833 | void |
| 834 | Finish_group::locks(Task_locker* tl) |
| 835 | { |
| 836 | tl->add(this, this->next_blocker_); |
| 837 | } |
| 838 | |
| 839 | // Loop over the archives until there are no new undefined symbols. |
| 840 | |
| 841 | void |
| 842 | Finish_group::run(Workqueue*) |
| 843 | { |
| 844 | size_t saw_undefined = this->saw_undefined_; |
| 845 | while (saw_undefined != this->symtab_->saw_undefined()) |
| 846 | { |
| 847 | saw_undefined = this->symtab_->saw_undefined(); |
| 848 | |
| 849 | for (Input_group::const_iterator p = this->input_group_->begin(); |
| 850 | p != this->input_group_->end(); |
| 851 | ++p) |
| 852 | { |
| 853 | Task_lock_obj<Archive> tl(this, *p); |
| 854 | |
| 855 | (*p)->add_symbols(this->symtab_, this->layout_, |
| 856 | this->input_objects_, this->mapfile_); |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | // Now that we're done with the archives, record the incremental |
| 861 | // layout information. |
| 862 | for (Input_group::const_iterator p = this->input_group_->begin(); |
| 863 | p != this->input_group_->end(); |
| 864 | ++p) |
| 865 | { |
| 866 | // For an incremental link, finish recording the layout information. |
| 867 | Incremental_inputs* incremental_inputs = |
| 868 | this->layout_->incremental_inputs(); |
| 869 | if (incremental_inputs != NULL) |
| 870 | incremental_inputs->report_archive_end(*p); |
| 871 | } |
| 872 | |
| 873 | if (parameters->options().has_plugins()) |
| 874 | parameters->options().plugins()->save_input_group(this->input_group_); |
| 875 | else |
| 876 | delete this->input_group_; |
| 877 | } |
| 878 | |
| 879 | // Class Read_script |
| 880 | |
| 881 | Read_script::~Read_script() |
| 882 | { |
| 883 | if (this->this_blocker_ != NULL) |
| 884 | delete this->this_blocker_; |
| 885 | // next_blocker_ is deleted by the task associated with the next |
| 886 | // input file. |
| 887 | } |
| 888 | |
| 889 | // We are blocked by this_blocker_. |
| 890 | |
| 891 | Task_token* |
| 892 | Read_script::is_runnable() |
| 893 | { |
| 894 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 895 | return this->this_blocker_; |
| 896 | return NULL; |
| 897 | } |
| 898 | |
| 899 | // We don't unlock next_blocker_ here. If the script names any input |
| 900 | // files, then the last file will be responsible for unlocking it. |
| 901 | |
| 902 | void |
| 903 | Read_script::locks(Task_locker*) |
| 904 | { |
| 905 | } |
| 906 | |
| 907 | // Read the script, if it is a script. |
| 908 | |
| 909 | void |
| 910 | Read_script::run(Workqueue* workqueue) |
| 911 | { |
| 912 | bool used_next_blocker; |
| 913 | if (!read_input_script(workqueue, this->symtab_, this->layout_, |
| 914 | this->dirpath_, this->dirindex_, this->input_objects_, |
| 915 | this->mapfile_, this->input_group_, |
| 916 | this->input_argument_, this->input_file_, |
| 917 | this->next_blocker_, &used_next_blocker)) |
| 918 | { |
| 919 | // Here we have to handle any other input file types we need. |
| 920 | gold_error(_("%s: not an object or archive"), |
| 921 | this->input_file_->file().filename().c_str()); |
| 922 | } |
| 923 | |
| 924 | if (!used_next_blocker) |
| 925 | { |
| 926 | // Queue up a task to unlock next_blocker. We can't just unlock |
| 927 | // it here, as we don't hold the workqueue lock. |
| 928 | workqueue->queue_soon(new Unblock_token(NULL, this->next_blocker_)); |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | // Return a debugging name for a Read_script task. |
| 933 | |
| 934 | std::string |
| 935 | Read_script::get_name() const |
| 936 | { |
| 937 | std::string ret("Read_script "); |
| 938 | if (this->input_argument_->file().is_lib()) |
| 939 | ret += "-l"; |
| 940 | else if (this->input_argument_->file().is_searched_file()) |
| 941 | ret += "-l:"; |
| 942 | ret += this->input_argument_->file().name(); |
| 943 | return ret; |
| 944 | } |
| 945 | |
| 946 | } // End namespace gold. |