gas/
[binutils.git] / gold / readsyms.cc
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1 // readsyms.cc -- read input file symbols for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
23 #include "gold.h"
25 #include <cstring>
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"
39 namespace gold
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.
49 class Unblock_token : public Task
51 public:
52 Unblock_token(Task_token* this_blocker, Task_token* next_blocker)
53 : this_blocker_(this_blocker), next_blocker_(next_blocker)
54 { }
56 ~Unblock_token()
58 if (this->this_blocker_ != NULL)
59 delete this->this_blocker_;
62 Task_token*
63 is_runnable()
65 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
66 return this->this_blocker_;
67 return NULL;
70 void
71 locks(Task_locker* tl)
72 { tl->add(this, this->next_blocker_); }
74 void
75 run(Workqueue*)
76 { }
78 std::string
79 get_name() const
80 { return "Unblock_token"; }
82 private:
83 Task_token* this_blocker_;
84 Task_token* next_blocker_;
87 // Class read_symbols.
89 Read_symbols::~Read_symbols()
91 // The this_blocker_ and next_blocker_ pointers are passed on to the
92 // Add_symbols task.
95 // If appropriate, issue a warning about skipping an incompatible
96 // file.
98 void
99 Read_symbols::incompatible_warning(const Input_argument* input_argument,
100 const Input_file* input_file)
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());
108 // Requeue a Read_symbols task to search for the next object with the
109 // same name.
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)
118 // Bump the directory search index.
119 ++dirindex;
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);
128 workqueue->queue(new Read_symbols(input_objects, symtab, layout, dirpath,
129 dirindex, mapfile, input_argument,
130 input_group, NULL, NULL, next_blocker));
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.
137 Task_token*
138 Read_symbols::is_runnable()
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();
145 return NULL;
148 // Return a Task_locker for a Read_symbols task. We don't need any
149 // locks here.
151 void
152 Read_symbols::locks(Task_locker* tl)
154 if (this->member_ != NULL)
155 tl->add(this, this->next_blocker_);
158 // Run a Read_symbols task.
160 void
161 Read_symbols::run(Workqueue* workqueue)
163 // If we didn't queue a new task, then we need to explicitly unblock
164 // the token.
165 if (!this->do_read_symbols(workqueue))
166 workqueue->queue_soon(new Unblock_token(this->this_blocker_,
167 this->next_blocker_));
170 // Handle a whole lib group. Other than collecting statistics, this just
171 // mimics what we do for regular object files in the command line.
173 bool
174 Read_symbols::do_whole_lib_group(Workqueue* workqueue)
176 const Input_file_lib* lib_group = this->input_argument_->lib();
178 ++Lib_group::total_lib_groups;
180 Task_token* this_blocker = this->this_blocker_;
181 for (Input_file_lib::const_iterator i = lib_group->begin();
182 i != lib_group->end();
183 ++i)
185 ++Lib_group::total_members;
186 ++Lib_group::total_members_loaded;
188 const Input_argument* arg = &*i;
190 Task_token* next_blocker;
191 if (i != lib_group->end() - 1)
193 next_blocker = new Task_token(true);
194 next_blocker->add_blocker();
196 else
197 next_blocker = this->next_blocker_;
199 workqueue->queue_soon(new Read_symbols(this->input_objects_,
200 this->symtab_, this->layout_,
201 this->dirpath_, this->dirindex_,
202 this->mapfile_, arg, NULL,
203 NULL, this_blocker, next_blocker));
204 this_blocker = next_blocker;
207 return true;
210 // Handle a lib group. We set Read_symbols Tasks as usual, but have them
211 // just record the symbol data instead of adding the objects. We also start
212 // a Add_lib_group_symbols Task which runs after we've read all the symbols.
213 // In that task we process the members in a loop until we are done.
215 bool
216 Read_symbols::do_lib_group(Workqueue* workqueue)
218 const Input_file_lib* lib_group = this->input_argument_->lib();
220 if (lib_group->options().whole_archive())
221 return this->do_whole_lib_group(workqueue);
223 Lib_group* lib = new Lib_group(lib_group, this);
225 Add_lib_group_symbols* add_lib_group_symbols =
226 new Add_lib_group_symbols(this->symtab_, this->layout_,
227 this->input_objects_,
228 lib, this->next_blocker_);
231 Task_token* next_blocker = new Task_token(true);
232 int j = 0;
233 for (Input_file_lib::const_iterator i = lib_group->begin();
234 i != lib_group->end();
235 ++i, ++j)
237 const Input_argument* arg = &*i;
238 Archive_member* m = lib->get_member(j);
240 next_blocker->add_blocker();
242 // Since this Read_symbols will not create an Add_symbols,
243 // just pass NULL as this_blocker.
244 workqueue->queue_soon(new Read_symbols(this->input_objects_,
245 this->symtab_, this->layout_,
246 this->dirpath_, this->dirindex_,
247 this->mapfile_, arg, NULL,
248 m, NULL, next_blocker));
251 add_lib_group_symbols->set_blocker(next_blocker, this->this_blocker_);
252 workqueue->queue_soon(add_lib_group_symbols);
254 return true;
257 // Open the file and read the symbols. Return true if a new task was
258 // queued, false if that could not happen due to some error.
260 bool
261 Read_symbols::do_read_symbols(Workqueue* workqueue)
263 if (this->input_argument_->is_group())
265 gold_assert(this->input_group_ == NULL);
266 this->do_group(workqueue);
267 return true;
270 if (this->input_argument_->is_lib())
271 return this->do_lib_group(workqueue);
273 Input_file* input_file = new Input_file(&this->input_argument_->file());
274 if (!input_file->open(*this->dirpath_, this, &this->dirindex_))
275 return false;
277 // Read enough of the file to pick up the entire ELF header.
279 off_t filesize = input_file->file().filesize();
281 if (filesize == 0)
283 gold_error(_("%s: file is empty"),
284 input_file->file().filename().c_str());
285 return false;
288 const unsigned char* ehdr;
289 int read_size;
290 bool is_elf = is_elf_object(input_file, 0, &ehdr, &read_size);
292 if (read_size >= Archive::sarmag)
294 bool is_thin_archive
295 = memcmp(ehdr, Archive::armagt, Archive::sarmag) == 0;
296 if (is_thin_archive
297 || memcmp(ehdr, Archive::armag, Archive::sarmag) == 0)
299 // This is an archive.
300 Archive* arch = new Archive(this->input_argument_->file().name(),
301 input_file, is_thin_archive,
302 this->dirpath_, this);
303 arch->setup();
305 // Unlock the archive so it can be used in the next task.
306 arch->unlock(this);
308 workqueue->queue_next(new Add_archive_symbols(this->symtab_,
309 this->layout_,
310 this->input_objects_,
311 this->dirpath_,
312 this->dirindex_,
313 this->mapfile_,
314 this->input_argument_,
315 arch,
316 this->input_group_,
317 this->this_blocker_,
318 this->next_blocker_));
319 return true;
323 if (parameters->options().has_plugins())
325 Pluginobj* obj = parameters->options().plugins()->claim_file(input_file,
326 0, filesize);
327 if (obj != NULL)
329 // The input file was claimed by a plugin, and its symbols
330 // have been provided by the plugin.
332 // We are done with the file at this point, so unlock it.
333 obj->unlock(this);
335 if (this->member_ != NULL)
337 this->member_->sd_ = NULL;
338 this->member_->obj_ = obj;
339 return true;
342 workqueue->queue_next(new Add_symbols(this->input_objects_,
343 this->symtab_,
344 this->layout_,
345 this->dirpath_,
346 this->dirindex_,
347 this->mapfile_,
348 this->input_argument_,
349 obj,
350 NULL,
351 NULL,
352 this->this_blocker_,
353 this->next_blocker_));
354 return true;
358 if (is_elf)
360 // This is an ELF object.
362 bool unconfigured = false;
363 bool* punconfigured = (input_file->will_search_for()
364 ? &unconfigured
365 : NULL);
366 Object* obj = make_elf_object(input_file->filename(),
367 input_file, 0, ehdr, read_size,
368 punconfigured);
369 if (obj == NULL)
371 if (unconfigured)
373 Read_symbols::incompatible_warning(this->input_argument_,
374 input_file);
375 input_file->file().release();
376 input_file->file().unlock(this);
377 delete input_file;
378 ++this->dirindex_;
379 return this->do_read_symbols(workqueue);
381 return false;
384 Read_symbols_data* sd = new Read_symbols_data;
385 obj->read_symbols(sd);
387 // Opening the file locked it, so now we need to unlock it. We
388 // need to unlock it before queuing the Add_symbols task,
389 // because the workqueue doesn't know about our lock on the
390 // file. If we queue the Add_symbols task first, it will be
391 // stuck on the end of the file lock, but since the workqueue
392 // doesn't know about that lock, it will never release the
393 // Add_symbols task.
395 input_file->file().unlock(this);
397 if (this->member_ != NULL)
399 this->member_->sd_ = sd;
400 this->member_->obj_ = obj;
401 this->member_->arg_serial_ =
402 this->input_argument_->file().arg_serial();
403 return true;
406 // We use queue_next because everything is cached for this
407 // task to run right away if possible.
409 workqueue->queue_next(new Add_symbols(this->input_objects_,
410 this->symtab_, this->layout_,
411 this->dirpath_,
412 this->dirindex_,
413 this->mapfile_,
414 this->input_argument_,
415 obj,
416 NULL,
418 this->this_blocker_,
419 this->next_blocker_));
421 return true;
424 // Queue up a task to try to parse this file as a script. We use a
425 // separate task so that the script will be read in order with other
426 // objects named on the command line. Also so that we don't try to
427 // read multiple scripts simultaneously, which could lead to
428 // unpredictable changes to the General_options structure.
430 workqueue->queue_soon(new Read_script(this->symtab_,
431 this->layout_,
432 this->dirpath_,
433 this->dirindex_,
434 this->input_objects_,
435 this->mapfile_,
436 this->input_group_,
437 this->input_argument_,
438 input_file,
439 this->this_blocker_,
440 this->next_blocker_));
441 return true;
444 // Handle a group. We need to walk through the arguments over and
445 // over until we don't see any new undefined symbols. We do this by
446 // setting off Read_symbols Tasks as usual, but recording the archive
447 // entries instead of deleting them. We also start a Finish_group
448 // Task which runs after we've read all the symbols. In that task we
449 // process the archives in a loop until we are done.
451 void
452 Read_symbols::do_group(Workqueue* workqueue)
454 Input_group* input_group = new Input_group();
456 const Input_file_group* group = this->input_argument_->group();
457 Task_token* this_blocker = this->this_blocker_;
459 Finish_group* finish_group = new Finish_group(this->input_objects_,
460 this->symtab_,
461 this->layout_,
462 this->mapfile_,
463 input_group,
464 this->next_blocker_);
466 Task_token* next_blocker = new Task_token(true);
467 next_blocker->add_blocker();
468 workqueue->queue_soon(new Start_group(this->symtab_, finish_group,
469 this_blocker, next_blocker));
470 this_blocker = next_blocker;
472 for (Input_file_group::const_iterator p = group->begin();
473 p != group->end();
474 ++p)
476 const Input_argument* arg = &*p;
477 gold_assert(arg->is_file());
479 next_blocker = new Task_token(true);
480 next_blocker->add_blocker();
481 workqueue->queue_soon(new Read_symbols(this->input_objects_,
482 this->symtab_, this->layout_,
483 this->dirpath_, this->dirindex_,
484 this->mapfile_, arg, input_group,
485 NULL, this_blocker, next_blocker));
486 this_blocker = next_blocker;
489 finish_group->set_blocker(this_blocker);
491 workqueue->queue_soon(finish_group);
494 // Return a debugging name for a Read_symbols task.
496 std::string
497 Read_symbols::get_name() const
499 if (this->input_argument_->is_group())
501 std::string ret("Read_symbols group (");
502 bool add_space = false;
503 const Input_file_group* group = this->input_argument_->group();
504 for (Input_file_group::const_iterator p = group->begin();
505 p != group->end();
506 ++p)
508 if (add_space)
509 ret += ' ';
510 ret += p->file().name();
511 add_space = true;
513 return ret + ')';
515 else if (this->input_argument_->is_lib())
517 std::string ret("Read_symbols lib (");
518 bool add_space = false;
519 const Input_file_lib* lib = this->input_argument_->lib();
520 for (Input_file_lib::const_iterator p = lib->begin();
521 p != lib->end();
522 ++p)
524 if (add_space)
525 ret += ' ';
526 ret += p->file().name();
527 add_space = true;
529 return ret + ')';
531 else
533 std::string ret("Read_symbols ");
534 if (this->input_argument_->file().is_lib())
535 ret += "-l";
536 else if (this->input_argument_->file().is_searched_file())
537 ret += "-l:";
538 ret += this->input_argument_->file().name();
539 return ret;
543 // Class Add_symbols.
545 Add_symbols::~Add_symbols()
547 if (this->this_blocker_ != NULL)
548 delete this->this_blocker_;
549 // next_blocker_ is deleted by the task associated with the next
550 // input file.
553 // We are blocked by this_blocker_. We block next_blocker_. We also
554 // lock the file.
556 Task_token*
557 Add_symbols::is_runnable()
559 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
560 return this->this_blocker_;
561 if (this->object_->is_locked())
562 return this->object_->token();
563 return NULL;
566 void
567 Add_symbols::locks(Task_locker* tl)
569 tl->add(this, this->next_blocker_);
570 Task_token* token = this->object_->token();
571 if (token != NULL)
572 tl->add(this, token);
575 // Add the symbols in the object to the symbol table.
577 void
578 Add_symbols::run(Workqueue*)
580 Pluginobj* pluginobj = this->object_->pluginobj();
581 if (pluginobj != NULL)
583 this->object_->add_symbols(this->symtab_, this->sd_, this->layout_);
584 return;
587 if (!this->input_objects_->add_object(this->object_))
589 gold_assert(this->sd_ != NULL);
590 delete this->sd_;
591 this->sd_ = NULL;
592 this->object_->release();
593 delete this->object_;
595 else
597 Incremental_inputs* incremental_inputs =
598 this->layout_->incremental_inputs();
599 if (incremental_inputs != NULL)
601 if (this->library_ != NULL && !this->library_->is_reported())
603 Incremental_binary* ibase = this->layout_->incremental_base();
604 gold_assert(ibase != NULL);
605 unsigned int lib_serial = this->library_->arg_serial();
606 unsigned int lib_index = this->library_->input_file_index();
607 Script_info* lib_script_info = ibase->get_script_info(lib_index);
608 incremental_inputs->report_archive_begin(this->library_,
609 lib_serial,
610 lib_script_info);
612 unsigned int arg_serial = this->input_argument_->file().arg_serial();
613 Script_info* script_info = this->input_argument_->script_info();
614 incremental_inputs->report_object(this->object_, arg_serial,
615 this->library_, script_info);
617 this->object_->layout(this->symtab_, this->layout_, this->sd_);
618 this->object_->add_symbols(this->symtab_, this->sd_, this->layout_);
619 delete this->sd_;
620 this->sd_ = NULL;
621 this->object_->release();
625 // Class Read_member.
627 Read_member::~Read_member()
629 if (this->this_blocker_ != NULL)
630 delete this->this_blocker_;
631 // next_blocker_ is deleted by the task associated with the next
632 // input file.
635 // Return whether a Read_member task is runnable.
637 Task_token*
638 Read_member::is_runnable()
640 return NULL;
643 void
644 Read_member::locks(Task_locker* tl)
646 tl->add(this, this->next_blocker_);
649 // Run a Read_member task.
651 void
652 Read_member::run(Workqueue*)
654 // This task doesn't need to do anything for now. The Read_symbols task
655 // that is queued for the archive library will cause the archive to be
656 // processed from scratch.
659 // Class Check_script.
661 Check_script::~Check_script()
663 if (this->this_blocker_ != NULL)
664 delete this->this_blocker_;
665 // next_blocker_ is deleted by the task associated with the next
666 // input file.
669 // Return whether a Check_script task is runnable.
671 Task_token*
672 Check_script::is_runnable()
674 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
675 return this->this_blocker_;
676 return NULL;
679 void
680 Check_script::locks(Task_locker* tl)
682 tl->add(this, this->next_blocker_);
685 // Run a Check_script task.
687 void
688 Check_script::run(Workqueue*)
690 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
691 gold_assert(incremental_inputs != NULL);
692 unsigned int arg_serial = this->input_reader_->arg_serial();
693 Script_info* script_info =
694 this->ibase_->get_script_info(this->input_file_index_);
695 Timespec mtime = this->input_reader_->get_mtime();
696 incremental_inputs->report_script(script_info, arg_serial, mtime);
699 // Class Check_library.
701 Check_library::~Check_library()
703 if (this->this_blocker_ != NULL)
704 delete this->this_blocker_;
705 // next_blocker_ is deleted by the task associated with the next
706 // input file.
709 // Return whether a Check_library task is runnable.
711 Task_token*
712 Check_library::is_runnable()
714 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
715 return this->this_blocker_;
716 return NULL;
719 void
720 Check_library::locks(Task_locker* tl)
722 tl->add(this, this->next_blocker_);
725 // Run a Check_library task.
727 void
728 Check_library::run(Workqueue*)
730 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
731 gold_assert(incremental_inputs != NULL);
732 Incremental_library* lib = this->ibase_->get_library(this->input_file_index_);
733 gold_assert(lib != NULL);
734 lib->copy_unused_symbols();
735 // FIXME: Check that unused symbols remain unused.
736 if (!lib->is_reported())
738 unsigned int lib_serial = lib->arg_serial();
739 unsigned int lib_index = lib->input_file_index();
740 Script_info* script_info = this->ibase_->get_script_info(lib_index);
741 incremental_inputs->report_archive_begin(lib, lib_serial, script_info);
743 incremental_inputs->report_archive_end(lib);
746 // Class Input_group.
748 // When we delete an Input_group we can delete the archive
749 // information.
751 Input_group::~Input_group()
753 for (Input_group::const_iterator p = this->begin();
754 p != this->end();
755 ++p)
756 delete *p;
759 // Class Start_group.
761 Start_group::~Start_group()
763 if (this->this_blocker_ != NULL)
764 delete this->this_blocker_;
765 // next_blocker_ is deleted by the task associated with the first
766 // file in the group.
769 // We need to wait for THIS_BLOCKER_ and unblock NEXT_BLOCKER_.
771 Task_token*
772 Start_group::is_runnable()
774 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
775 return this->this_blocker_;
776 return NULL;
779 void
780 Start_group::locks(Task_locker* tl)
782 tl->add(this, this->next_blocker_);
785 // Store the number of undefined symbols we see now.
787 void
788 Start_group::run(Workqueue*)
790 this->finish_group_->set_saw_undefined(this->symtab_->saw_undefined());
793 // Class Finish_group.
795 Finish_group::~Finish_group()
797 if (this->this_blocker_ != NULL)
798 delete this->this_blocker_;
799 // next_blocker_ is deleted by the task associated with the next
800 // input file following the group.
803 // We need to wait for THIS_BLOCKER_ and unblock NEXT_BLOCKER_.
805 Task_token*
806 Finish_group::is_runnable()
808 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
809 return this->this_blocker_;
810 return NULL;
813 void
814 Finish_group::locks(Task_locker* tl)
816 tl->add(this, this->next_blocker_);
819 // Loop over the archives until there are no new undefined symbols.
821 void
822 Finish_group::run(Workqueue*)
824 size_t saw_undefined = this->saw_undefined_;
825 while (saw_undefined != this->symtab_->saw_undefined())
827 saw_undefined = this->symtab_->saw_undefined();
829 for (Input_group::const_iterator p = this->input_group_->begin();
830 p != this->input_group_->end();
831 ++p)
833 Task_lock_obj<Archive> tl(this, *p);
835 (*p)->add_symbols(this->symtab_, this->layout_,
836 this->input_objects_, this->mapfile_);
840 // Now that we're done with the archives, record the incremental
841 // layout information.
842 for (Input_group::const_iterator p = this->input_group_->begin();
843 p != this->input_group_->end();
844 ++p)
846 // For an incremental link, finish recording the layout information.
847 Incremental_inputs* incremental_inputs =
848 this->layout_->incremental_inputs();
849 if (incremental_inputs != NULL)
850 incremental_inputs->report_archive_end(*p);
853 if (parameters->options().has_plugins())
854 parameters->options().plugins()->save_input_group(this->input_group_);
855 else
856 delete this->input_group_;
859 // Class Read_script
861 Read_script::~Read_script()
863 if (this->this_blocker_ != NULL)
864 delete this->this_blocker_;
865 // next_blocker_ is deleted by the task associated with the next
866 // input file.
869 // We are blocked by this_blocker_.
871 Task_token*
872 Read_script::is_runnable()
874 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
875 return this->this_blocker_;
876 return NULL;
879 // We don't unlock next_blocker_ here. If the script names any input
880 // files, then the last file will be responsible for unlocking it.
882 void
883 Read_script::locks(Task_locker*)
887 // Read the script, if it is a script.
889 void
890 Read_script::run(Workqueue* workqueue)
892 bool used_next_blocker;
893 if (!read_input_script(workqueue, this->symtab_, this->layout_,
894 this->dirpath_, this->dirindex_, this->input_objects_,
895 this->mapfile_, this->input_group_,
896 this->input_argument_, this->input_file_,
897 this->next_blocker_, &used_next_blocker))
899 // Here we have to handle any other input file types we need.
900 gold_error(_("%s: not an object or archive"),
901 this->input_file_->file().filename().c_str());
904 if (!used_next_blocker)
906 // Queue up a task to unlock next_blocker. We can't just unlock
907 // it here, as we don't hold the workqueue lock.
908 workqueue->queue_soon(new Unblock_token(NULL, this->next_blocker_));
912 // Return a debugging name for a Read_script task.
914 std::string
915 Read_script::get_name() const
917 std::string ret("Read_script ");
918 if (this->input_argument_->file().is_lib())
919 ret += "-l";
920 else if (this->input_argument_->file().is_searched_file())
921 ret += "-l:";
922 ret += this->input_argument_->file().name();
923 return ret;
926 } // End namespace gold.