1 // gold.cc -- main linker functions
3 // Copyright 2006, 2007, 2008, 2009, 2010 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.
30 #include "libiberty.h"
34 #include "workqueue.h"
35 #include "dirsearch.h"
46 #include "incremental.h"
53 const char* program_name
;
56 process_incremental_input(Incremental_binary
*, unsigned int, Input_objects
*,
57 Symbol_table
*, Layout
*, Dirsearch
*, Mapfile
*,
58 Task_token
*, Task_token
*);
61 gold_exit(bool status
)
63 if (parameters
!= NULL
64 && parameters
->options_valid()
65 && parameters
->options().has_plugins())
66 parameters
->options().plugins()->cleanup();
67 if (!status
&& parameters
!= NULL
&& parameters
->options_valid())
68 unlink_if_ordinary(parameters
->options().output_file_name());
69 exit(status
? EXIT_SUCCESS
: EXIT_FAILURE
);
75 // We are out of memory, so try hard to print a reasonable message.
76 // Note that we don't try to translate this message, since the
77 // translation process itself will require memory.
79 // LEN only exists to avoid a pointless warning when write is
80 // declared with warn_use_result, as when compiling with
81 // -D_USE_FORTIFY on GNU/Linux. Casting to void does not appear to
82 // work, at least not with gcc 4.3.0.
84 ssize_t len
= write(2, program_name
, strlen(program_name
));
87 const char* const s
= ": out of memory\n";
88 len
= write(2, s
, strlen(s
));
93 // Handle an unreachable case.
96 do_gold_unreachable(const char* filename
, int lineno
, const char* function
)
98 fprintf(stderr
, _("%s: internal error in %s, at %s:%d\n"),
99 program_name
, function
, filename
, lineno
);
103 // This class arranges to run the functions done in the middle of the
104 // link. It is just a closure.
106 class Middle_runner
: public Task_function_runner
109 Middle_runner(const General_options
& options
,
110 const Input_objects
* input_objects
,
111 Symbol_table
* symtab
,
112 Layout
* layout
, Mapfile
* mapfile
)
113 : options_(options
), input_objects_(input_objects
), symtab_(symtab
),
114 layout_(layout
), mapfile_(mapfile
)
118 run(Workqueue
*, const Task
*);
121 const General_options
& options_
;
122 const Input_objects
* input_objects_
;
123 Symbol_table
* symtab_
;
129 Middle_runner::run(Workqueue
* workqueue
, const Task
* task
)
131 queue_middle_tasks(this->options_
, task
, this->input_objects_
, this->symtab_
,
132 this->layout_
, workqueue
, this->mapfile_
);
135 // This class arranges the tasks to process the relocs for garbage collection.
137 class Gc_runner
: public Task_function_runner
140 Gc_runner(const General_options
& options
,
141 const Input_objects
* input_objects
,
142 Symbol_table
* symtab
,
143 Layout
* layout
, Mapfile
* mapfile
)
144 : options_(options
), input_objects_(input_objects
), symtab_(symtab
),
145 layout_(layout
), mapfile_(mapfile
)
149 run(Workqueue
*, const Task
*);
152 const General_options
& options_
;
153 const Input_objects
* input_objects_
;
154 Symbol_table
* symtab_
;
160 Gc_runner::run(Workqueue
* workqueue
, const Task
* task
)
162 queue_middle_gc_tasks(this->options_
, task
, this->input_objects_
,
163 this->symtab_
, this->layout_
, workqueue
,
167 // Queue up the initial set of tasks for this link job.
170 queue_initial_tasks(const General_options
& options
,
171 Dirsearch
& search_path
,
172 const Command_line
& cmdline
,
173 Workqueue
* workqueue
, Input_objects
* input_objects
,
174 Symbol_table
* symtab
, Layout
* layout
, Mapfile
* mapfile
)
176 if (cmdline
.begin() == cmdline
.end())
178 if (options
.printed_version())
180 gold_fatal(_("no input files"));
183 int thread_count
= options
.thread_count_initial();
184 if (thread_count
== 0)
185 thread_count
= cmdline
.number_of_input_files();
186 workqueue
->set_thread_count(thread_count
);
188 // For incremental links, the base output file.
189 Incremental_binary
* ibase
= NULL
;
191 if (parameters
->incremental())
193 if (options
.relocatable())
194 gold_error(_("incremental linking is incompatible with -r"));
195 if (options
.emit_relocs())
196 gold_error(_("incremental linking is incompatible with --emit-relocs"));
197 if (options
.gc_sections())
198 gold_error(_("incremental linking is incompatible with --gc-sections"));
199 if (options
.icf_enabled())
200 gold_error(_("incremental linking is incompatible with --icf"));
201 if (options
.has_plugins())
202 gold_error(_("incremental linking is incompatible with --plugin"));
204 if (parameters
->incremental_update())
206 Output_file
* of
= new Output_file(options
.output_file_name());
207 if (!of
->open_for_modification())
208 gold_info(_("incremental update not possible: "
210 options
.output_file_name());
213 ibase
= open_incremental_binary(of
);
215 && ibase
->check_inputs(cmdline
, layout
->incremental_inputs()))
216 ibase
->init_layout(layout
);
226 if (set_parameters_incremental_full())
227 gold_info(_("linking with --incremental-full"));
229 gold_fatal(_("restart link with --incremental-full"));
234 // Read the input files. We have to add the symbols to the symbol
235 // table in order. We do this by creating a separate blocker for
236 // each input file. We associate the blocker with the following
237 // input file, to give us a convenient place to delete it.
238 Task_token
* this_blocker
= NULL
;
241 // Normal link. Queue a Read_symbols task for each input file
242 // on the command line.
243 for (Command_line::const_iterator p
= cmdline
.begin();
247 Task_token
* next_blocker
= new Task_token(true);
248 next_blocker
->add_blocker();
249 workqueue
->queue(new Read_symbols(input_objects
, symtab
, layout
,
250 &search_path
, 0, mapfile
, &*p
, NULL
,
251 NULL
, this_blocker
, next_blocker
));
252 this_blocker
= next_blocker
;
257 // Incremental update link. Process the list of input files
258 // stored in the base file, and queue a task for each file:
259 // a Read_symbols task for a changed file, and an Add_symbols task
260 // for an unchanged file. We need to mark all the space used by
261 // unchanged files before we can start any tasks running.
262 unsigned int input_file_count
= ibase
->input_file_count();
263 std::vector
<Task
*> tasks
;
264 tasks
.reserve(input_file_count
);
265 for (unsigned int i
= 0; i
< input_file_count
; ++i
)
267 Task_token
* next_blocker
= new Task_token(true);
268 next_blocker
->add_blocker();
269 Task
* t
= process_incremental_input(ibase
, i
, input_objects
, symtab
,
270 layout
, &search_path
, mapfile
,
271 this_blocker
, next_blocker
);
273 this_blocker
= next_blocker
;
275 // Now we can queue the tasks.
276 for (unsigned int i
= 0; i
< tasks
.size(); i
++)
277 workqueue
->queue(tasks
[i
]);
280 if (options
.has_plugins())
282 Task_token
* next_blocker
= new Task_token(true);
283 next_blocker
->add_blocker();
284 workqueue
->queue(new Plugin_hook(options
, input_objects
, symtab
, layout
,
285 &search_path
, mapfile
, this_blocker
,
287 this_blocker
= next_blocker
;
290 if (options
.relocatable()
291 && (options
.gc_sections() || options
.icf_enabled()))
292 gold_error(_("cannot mix -r with --gc-sections or --icf"));
294 if (options
.gc_sections() || options
.icf_enabled())
296 workqueue
->queue(new Task_function(new Gc_runner(options
,
302 "Task_function Gc_runner"));
306 workqueue
->queue(new Task_function(new Middle_runner(options
,
312 "Task_function Middle_runner"));
316 // Process an incremental input file: if it is unchanged from the previous
317 // link, return a task to add its symbols from the base file's incremental
318 // info; if it has changed, return a normal Read_symbols task. We create a
319 // task for every input file, if only to report the file for rebuilding the
323 process_incremental_input(Incremental_binary
* ibase
,
324 unsigned int input_file_index
,
325 Input_objects
* input_objects
,
326 Symbol_table
* symtab
,
328 Dirsearch
* search_path
,
330 Task_token
* this_blocker
,
331 Task_token
* next_blocker
)
333 const Incremental_binary::Input_reader
* input_reader
=
334 ibase
->get_input_reader(input_file_index
);
335 Incremental_input_type input_type
= input_reader
->type();
337 // Get the input argument corresponding to this input file, matching on
338 // the argument serial number. If the input file cannot be matched
339 // to an existing input argument, synthesize a new one.
340 const Input_argument
* input_argument
=
341 ibase
->get_input_argument(input_file_index
);
342 if (input_argument
== NULL
)
344 Input_file_argument
file(input_reader
->filename(),
345 Input_file_argument::INPUT_FILE_TYPE_FILE
,
346 "", false, parameters
->options());
347 Input_argument
* arg
= new Input_argument(file
);
348 arg
->set_script_info(ibase
->get_script_info(input_file_index
));
349 input_argument
= arg
;
352 gold_debug(DEBUG_INCREMENTAL
, "Incremental object: %s, type %d",
353 input_reader
->filename(), input_type
);
355 if (input_type
== INCREMENTAL_INPUT_SCRIPT
)
357 // Incremental_binary::check_inputs should have cancelled the
358 // incremental update if the script has changed.
359 gold_assert(!ibase
->file_has_changed(input_file_index
));
360 return new Check_script(layout
, ibase
, input_file_index
, input_reader
,
361 this_blocker
, next_blocker
);
364 if (input_type
== INCREMENTAL_INPUT_ARCHIVE
)
366 Incremental_library
* lib
= ibase
->get_library(input_file_index
);
367 gold_assert(lib
!= NULL
);
368 if (lib
->filename() == "/group/"
369 || !ibase
->file_has_changed(input_file_index
))
371 // Queue a task to check that no references have been added to any
372 // of the library's unused symbols.
373 return new Check_library(symtab
, layout
, ibase
, input_file_index
,
374 input_reader
, this_blocker
, next_blocker
);
378 // Queue a Read_symbols task to process the archive normally.
379 return new Read_symbols(input_objects
, symtab
, layout
, search_path
,
380 0, mapfile
, input_argument
, NULL
, NULL
,
381 this_blocker
, next_blocker
);
385 if (input_type
== INCREMENTAL_INPUT_ARCHIVE_MEMBER
)
387 // For archive members, check the timestamp of the containing archive.
388 Incremental_library
* lib
= ibase
->get_library(input_file_index
);
389 gold_assert(lib
!= NULL
);
390 // Process members of a --start-lib/--end-lib group as normal objects.
391 if (lib
->filename() != "/group/")
393 if (ibase
->file_has_changed(lib
->input_file_index()))
395 return new Read_member(input_objects
, symtab
, layout
, mapfile
,
396 input_reader
, this_blocker
, next_blocker
);
400 // The previous contributions from this file will be kept.
401 // Mark the pieces of output sections contributed by this
403 ibase
->reserve_layout(input_file_index
);
404 Object
* obj
= make_sized_incremental_object(ibase
,
408 return new Add_symbols(input_objects
, symtab
, layout
,
409 search_path
, 0, mapfile
, input_argument
,
410 obj
, lib
, NULL
, this_blocker
,
416 // Normal object file or shared library. Check if the file has changed
417 // since the last incremental link.
418 if (ibase
->file_has_changed(input_file_index
))
420 return new Read_symbols(input_objects
, symtab
, layout
, search_path
, 0,
421 mapfile
, input_argument
, NULL
, NULL
,
422 this_blocker
, next_blocker
);
426 // The previous contributions from this file will be kept.
427 // Mark the pieces of output sections contributed by this object.
428 ibase
->reserve_layout(input_file_index
);
429 Object
* obj
= make_sized_incremental_object(ibase
,
433 return new Add_symbols(input_objects
, symtab
, layout
, search_path
, 0,
434 mapfile
, input_argument
, obj
, NULL
, NULL
,
435 this_blocker
, next_blocker
);
439 // Queue up a set of tasks to be done before queueing the middle set
440 // of tasks. This is only necessary when garbage collection
441 // (--gc-sections) of unused sections is desired. The relocs are read
442 // and processed here early to determine the garbage sections before the
443 // relocs can be scanned in later tasks.
446 queue_middle_gc_tasks(const General_options
& options
,
448 const Input_objects
* input_objects
,
449 Symbol_table
* symtab
,
451 Workqueue
* workqueue
,
454 // Read_relocs for all the objects must be done and processed to find
455 // unused sections before any scanning of the relocs can take place.
456 Task_token
* this_blocker
= NULL
;
457 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
458 p
!= input_objects
->relobj_end();
461 Task_token
* next_blocker
= new Task_token(true);
462 next_blocker
->add_blocker();
463 workqueue
->queue(new Read_relocs(symtab
, layout
, *p
, this_blocker
,
465 this_blocker
= next_blocker
;
468 // If we are given only archives in input, we have no regular
469 // objects and THIS_BLOCKER is NULL here. Create a dummy
470 // blocker here so that we can run the middle tasks immediately.
471 if (this_blocker
== NULL
)
473 gold_assert(input_objects
->number_of_relobjs() == 0);
474 this_blocker
= new Task_token(true);
477 workqueue
->queue(new Task_function(new Middle_runner(options
,
483 "Task_function Middle_runner"));
486 // Queue up the middle set of tasks. These are the tasks which run
487 // after all the input objects have been found and all the symbols
488 // have been read, but before we lay out the output file.
491 queue_middle_tasks(const General_options
& options
,
493 const Input_objects
* input_objects
,
494 Symbol_table
* symtab
,
496 Workqueue
* workqueue
,
499 // Add any symbols named with -u options to the symbol table.
500 symtab
->add_undefined_symbols_from_command_line(layout
);
502 // If garbage collection was chosen, relocs have been read and processed
503 // at this point by pre_middle_tasks. Layout can then be done for all
505 if (parameters
->options().gc_sections())
507 // Find the start symbol if any.
509 if (parameters
->options().entry())
510 start_sym
= symtab
->lookup(parameters
->options().entry());
512 start_sym
= symtab
->lookup("_start");
513 if (start_sym
!= NULL
)
516 unsigned int shndx
= start_sym
->shndx(&is_ordinary
);
519 symtab
->gc()->worklist().push(
520 Section_id(start_sym
->object(), shndx
));
523 // Symbols named with -u should not be considered garbage.
524 symtab
->gc_mark_undef_symbols(layout
);
525 gold_assert(symtab
->gc() != NULL
);
526 // Do a transitive closure on all references to determine the worklist.
527 symtab
->gc()->do_transitive_closure();
530 // If identical code folding (--icf) is chosen it makes sense to do it
531 // only after garbage collection (--gc-sections) as we do not want to
532 // be folding sections that will be garbage.
533 if (parameters
->options().icf_enabled())
535 symtab
->icf()->find_identical_sections(input_objects
, symtab
);
538 // Call Object::layout for the second time to determine the
539 // output_sections for all referenced input sections. When
540 // --gc-sections or --icf is turned on, Object::layout is
541 // called twice. It is called the first time when the
542 // symbols are added.
543 if (parameters
->options().gc_sections()
544 || parameters
->options().icf_enabled())
546 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
547 p
!= input_objects
->relobj_end();
550 Task_lock_obj
<Object
> tlo(task
, *p
);
551 (*p
)->layout(symtab
, layout
, NULL
);
555 // Layout deferred objects due to plugins.
556 if (parameters
->options().has_plugins())
558 Plugin_manager
* plugins
= parameters
->options().plugins();
559 gold_assert(plugins
!= NULL
);
560 plugins
->layout_deferred_objects();
563 if (parameters
->options().gc_sections()
564 || parameters
->options().icf_enabled())
566 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
567 p
!= input_objects
->relobj_end();
570 // Update the value of output_section stored in rd.
571 Read_relocs_data
* rd
= (*p
)->get_relocs_data();
572 for (Read_relocs_data::Relocs_list::iterator q
= rd
->relocs
.begin();
573 q
!= rd
->relocs
.end();
576 q
->output_section
= (*p
)->output_section(q
->data_shndx
);
577 q
->needs_special_offset_handling
=
578 (*p
)->is_output_section_offset_invalid(q
->data_shndx
);
583 // We have to support the case of not seeing any input objects, and
584 // generate an empty file. Existing builds depend on being able to
585 // pass an empty archive to the linker and get an empty object file
586 // out. In order to do this we need to use a default target.
587 if (input_objects
->number_of_input_objects() == 0
588 && layout
->incremental_base() == NULL
)
589 parameters_force_valid_target();
591 int thread_count
= options
.thread_count_middle();
592 if (thread_count
== 0)
593 thread_count
= std::max(2, input_objects
->number_of_input_objects());
594 workqueue
->set_thread_count(thread_count
);
596 // Now we have seen all the input files.
597 const bool doing_static_link
=
598 (!input_objects
->any_dynamic()
599 && !parameters
->options().output_is_position_independent());
600 set_parameters_doing_static_link(doing_static_link
);
601 if (!doing_static_link
&& options
.is_static())
603 // We print out just the first .so we see; there may be others.
604 gold_assert(input_objects
->dynobj_begin() != input_objects
->dynobj_end());
605 gold_error(_("cannot mix -static with dynamic object %s"),
606 (*input_objects
->dynobj_begin())->name().c_str());
608 if (!doing_static_link
&& parameters
->options().relocatable())
609 gold_fatal(_("cannot mix -r with dynamic object %s"),
610 (*input_objects
->dynobj_begin())->name().c_str());
611 if (!doing_static_link
612 && options
.oformat_enum() != General_options::OBJECT_FORMAT_ELF
)
613 gold_fatal(_("cannot use non-ELF output format with dynamic object %s"),
614 (*input_objects
->dynobj_begin())->name().c_str());
616 if (parameters
->options().relocatable())
618 Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
619 if (p
!= input_objects
->relobj_end())
621 bool uses_split_stack
= (*p
)->uses_split_stack();
622 for (++p
; p
!= input_objects
->relobj_end(); ++p
)
624 if ((*p
)->uses_split_stack() != uses_split_stack
)
625 gold_fatal(_("cannot mix split-stack '%s' and "
626 "non-split-stack '%s' when using -r"),
627 (*input_objects
->relobj_begin())->name().c_str(),
628 (*p
)->name().c_str());
633 if (is_debugging_enabled(DEBUG_SCRIPT
))
634 layout
->script_options()->print(stderr
);
636 // For each dynamic object, record whether we've seen all the
637 // dynamic objects that it depends upon.
638 input_objects
->check_dynamic_dependencies();
640 // See if any of the input definitions violate the One Definition Rule.
641 // TODO: if this is too slow, do this as a task, rather than inline.
642 symtab
->detect_odr_violations(task
, options
.output_file_name());
644 // Do the --no-undefined-version check.
645 if (!parameters
->options().undefined_version())
647 Script_options
* so
= layout
->script_options();
648 so
->version_script_info()->check_unmatched_names(symtab
);
651 // Create any automatic note sections.
652 layout
->create_notes();
654 // Create any output sections required by any linker script.
655 layout
->create_script_sections();
657 // Define some sections and symbols needed for a dynamic link. This
658 // handles some cases we want to see before we read the relocs.
659 layout
->create_initial_dynamic_sections(symtab
);
661 // Define symbols from any linker scripts.
662 layout
->define_script_symbols(symtab
);
664 // Attach sections to segments.
665 layout
->attach_sections_to_segments();
667 if (!parameters
->options().relocatable())
669 // Predefine standard symbols.
670 define_standard_symbols(symtab
, layout
);
672 // Define __start and __stop symbols for output sections where
674 layout
->define_section_symbols(symtab
);
677 // Make sure we have symbols for any required group signatures.
678 layout
->define_group_signatures(symtab
);
680 Task_token
* this_blocker
= NULL
;
682 // Allocate common symbols. We use a blocker to run this before the
683 // Scan_relocs tasks, because it writes to the symbol table just as
685 if (parameters
->options().define_common())
687 this_blocker
= new Task_token(true);
688 this_blocker
->add_blocker();
689 workqueue
->queue(new Allocate_commons_task(symtab
, layout
, mapfile
,
693 // If doing garbage collection, the relocations have already been read.
694 // Otherwise, read and scan the relocations.
695 if (parameters
->options().gc_sections()
696 || parameters
->options().icf_enabled())
698 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
699 p
!= input_objects
->relobj_end();
702 Task_token
* next_blocker
= new Task_token(true);
703 next_blocker
->add_blocker();
704 workqueue
->queue(new Scan_relocs(symtab
, layout
, *p
,
705 (*p
)->get_relocs_data(),
706 this_blocker
, next_blocker
));
707 this_blocker
= next_blocker
;
712 // Read the relocations of the input files. We do this to find
713 // which symbols are used by relocations which require a GOT and/or
714 // a PLT entry, or a COPY reloc. When we implement garbage
715 // collection we will do it here by reading the relocations in a
716 // breadth first search by references.
718 // We could also read the relocations during the first pass, and
719 // mark symbols at that time. That is how the old GNU linker works.
720 // Doing that is more complex, since we may later decide to discard
721 // some of the sections, and thus change our minds about the types
722 // of references made to the symbols.
723 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
724 p
!= input_objects
->relobj_end();
727 Task_token
* next_blocker
= new Task_token(true);
728 next_blocker
->add_blocker();
729 workqueue
->queue(new Read_relocs(symtab
, layout
, *p
, this_blocker
,
731 this_blocker
= next_blocker
;
735 if (this_blocker
== NULL
)
737 if (input_objects
->number_of_relobjs() == 0)
739 // If we are given only archives in input, we have no regular
740 // objects and THIS_BLOCKER is NULL here. Create a dummy
741 // blocker here so that we can run the layout task immediately.
742 this_blocker
= new Task_token(true);
746 // If we failed to open any input files, it's possible for
747 // THIS_BLOCKER to be NULL here. There's no real point in
748 // continuing if that happens.
749 gold_assert(parameters
->errors()->error_count() > 0);
754 // When all those tasks are complete, we can start laying out the
756 // TODO(csilvers): figure out a more principled way to get the target
757 Target
* target
= const_cast<Target
*>(¶meters
->target());
758 workqueue
->queue(new Task_function(new Layout_task_runner(options
,
765 "Task_function Layout_task_runner"));
768 // Queue up the final set of tasks. This is called at the end of
772 queue_final_tasks(const General_options
& options
,
773 const Input_objects
* input_objects
,
774 const Symbol_table
* symtab
,
776 Workqueue
* workqueue
,
779 int thread_count
= options
.thread_count_final();
780 if (thread_count
== 0)
781 thread_count
= std::max(2, input_objects
->number_of_input_objects());
782 workqueue
->set_thread_count(thread_count
);
784 bool any_postprocessing_sections
= layout
->any_postprocessing_sections();
786 // Use a blocker to wait until all the input sections have been
788 Task_token
* input_sections_blocker
= NULL
;
789 if (!any_postprocessing_sections
)
791 input_sections_blocker
= new Task_token(true);
792 input_sections_blocker
->add_blockers(input_objects
->number_of_relobjs());
795 // Use a blocker to block any objects which have to wait for the
796 // output sections to complete before they can apply relocations.
797 Task_token
* output_sections_blocker
= new Task_token(true);
798 output_sections_blocker
->add_blocker();
800 // Use a blocker to block the final cleanup task.
801 Task_token
* final_blocker
= new Task_token(true);
802 // Write_symbols_task, Write_sections_task, Write_data_task,
804 final_blocker
->add_blockers(3);
805 final_blocker
->add_blockers(input_objects
->number_of_relobjs());
806 if (!any_postprocessing_sections
)
807 final_blocker
->add_blocker();
809 // Queue a task to write out the symbol table.
810 workqueue
->queue(new Write_symbols_task(layout
,
818 // Queue a task to write out the output sections.
819 workqueue
->queue(new Write_sections_task(layout
, of
, output_sections_blocker
,
822 // Queue a task to write out everything else.
823 workqueue
->queue(new Write_data_task(layout
, symtab
, of
, final_blocker
));
825 // Queue a task for each input object to relocate the sections and
826 // write out the local symbols.
827 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
828 p
!= input_objects
->relobj_end();
830 workqueue
->queue(new Relocate_task(symtab
, layout
, *p
, of
,
831 input_sections_blocker
,
832 output_sections_blocker
,
835 // Queue a task to write out the output sections which depend on
836 // input sections. If there are any sections which require
837 // postprocessing, then we need to do this last, since it may resize
839 if (!any_postprocessing_sections
)
841 Task
* t
= new Write_after_input_sections_task(layout
, of
,
842 input_sections_blocker
,
848 Task_token
* new_final_blocker
= new Task_token(true);
849 new_final_blocker
->add_blocker();
850 Task
* t
= new Write_after_input_sections_task(layout
, of
,
854 final_blocker
= new_final_blocker
;
857 // Queue a task to close the output file. This will be blocked by
859 workqueue
->queue(new Task_function(new Close_task_runner(&options
, layout
,
862 "Task_function Close_task_runner"));
865 } // End namespace gold.