// gold.cc -- main linker functions
-// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "gc.h"
#include "icf.h"
#include "incremental.h"
+#include "timer.h"
namespace gold
{
// This class arranges the tasks to process the relocs for garbage collection.
-class Gc_runner : public Task_function_runner
+class Gc_runner : public Task_function_runner
{
public:
Gc_runner(const General_options& options,
void
Gc_runner::run(Workqueue* workqueue, const Task* task)
{
- queue_middle_gc_tasks(this->options_, task, this->input_objects_,
- this->symtab_, this->layout_, workqueue,
- this->mapfile_);
+ queue_middle_gc_tasks(this->options_, task, this->input_objects_,
+ this->symtab_, this->layout_, workqueue,
+ this->mapfile_);
}
// Queue up the initial set of tasks for this link job.
Workqueue* workqueue, Input_objects* input_objects,
Symbol_table* symtab, Layout* layout, Mapfile* mapfile)
{
- if (cmdline.begin() == cmdline.end())
+ if (cmdline.number_of_input_files() == 0)
{
bool is_ok = false;
if (options.printed_version())
{
workqueue->queue(new Task_function(new Gc_runner(options,
input_objects,
- symtab,
- layout,
- mapfile),
- this_blocker,
- "Task_function Gc_runner"));
+ symtab,
+ layout,
+ mapfile),
+ this_blocker,
+ "Task_function Gc_runner"));
}
else
{
workqueue->queue(new Task_function(new Middle_runner(options,
- input_objects,
- symtab,
- layout,
- mapfile),
- this_blocker,
- "Task_function Middle_runner"));
+ input_objects,
+ symtab,
+ layout,
+ mapfile),
+ this_blocker,
+ "Task_function Middle_runner"));
}
}
}
workqueue->queue(new Task_function(new Middle_runner(options,
- input_objects,
- symtab,
- layout,
- mapfile),
- this_blocker,
- "Task_function Middle_runner"));
+ input_objects,
+ symtab,
+ layout,
+ mapfile),
+ this_blocker,
+ "Task_function Middle_runner"));
}
// Queue up the middle set of tasks. These are the tasks which run
Workqueue* workqueue,
Mapfile* mapfile)
{
+ Timer* timer = parameters->timer();
+ if (timer != NULL)
+ timer->stamp(0);
+
+ // We have to support the case of not seeing any input objects, and
+ // generate an empty file. Existing builds depend on being able to
+ // pass an empty archive to the linker and get an empty object file
+ // out. In order to do this we need to use a default target.
+ if (input_objects->number_of_input_objects() == 0
+ && layout->incremental_base() == NULL)
+ parameters_force_valid_target();
+
// Add any symbols named with -u options to the symbol table.
symtab->add_undefined_symbols_from_command_line(layout);
// If garbage collection was chosen, relocs have been read and processed
- // at this point by pre_middle_tasks. Layout can then be done for all
+ // at this point by pre_middle_tasks. Layout can then be done for all
// objects.
if (parameters->options().gc_sections())
{
// Find the start symbol if any.
- Symbol* start_sym = symtab->lookup(parameters->entry());
- if (start_sym != NULL)
- {
- bool is_ordinary;
- unsigned int shndx = start_sym->shndx(&is_ordinary);
- if (is_ordinary)
- {
- symtab->gc()->worklist().push(
- Section_id(start_sym->object(), shndx));
- }
- }
+ Symbol* sym = symtab->lookup(parameters->entry());
+ if (sym != NULL)
+ symtab->gc_mark_symbol(sym);
+ sym = symtab->lookup(parameters->options().init());
+ if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj())
+ symtab->gc_mark_symbol(sym);
+ sym = symtab->lookup(parameters->options().fini());
+ if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj())
+ symtab->gc_mark_symbol(sym);
// Symbols named with -u should not be considered garbage.
symtab->gc_mark_undef_symbols(layout);
gold_assert(symtab->gc() != NULL);
symtab->gc()->do_transitive_closure();
}
- // If identical code folding (--icf) is chosen it makes sense to do it
- // only after garbage collection (--gc-sections) as we do not want to
+ // If identical code folding (--icf) is chosen it makes sense to do it
+ // only after garbage collection (--gc-sections) as we do not want to
// be folding sections that will be garbage.
if (parameters->options().icf_enabled())
{
symtab->icf()->find_identical_sections(input_objects, symtab);
}
- // Call Object::layout for the second time to determine the
- // output_sections for all referenced input sections. When
- // --gc-sections or --icf is turned on, Object::layout is
- // called twice. It is called the first time when the
- // symbols are added.
+ // Call Object::layout for the second time to determine the
+ // output_sections for all referenced input sections. When
+ // --gc-sections or --icf is turned on, or when certain input
+ // sections have to be mapped to unique segments, Object::layout
+ // is called twice. It is called the first time when symbols
+ // are added.
if (parameters->options().gc_sections()
- || parameters->options().icf_enabled())
+ || parameters->options().icf_enabled()
+ || layout->is_unique_segment_for_sections_specified())
{
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- Task_lock_obj<Object> tlo(task, *p);
- (*p)->layout(symtab, layout, NULL);
- }
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Task_lock_obj<Object> tlo(task, *p);
+ (*p)->layout(symtab, layout, NULL);
+ }
}
// Layout deferred objects due to plugins.
Plugin_manager* plugins = parameters->options().plugins();
gold_assert(plugins != NULL);
plugins->layout_deferred_objects();
- }
+ }
+
+ // Finalize the .eh_frame section.
+ layout->finalize_eh_frame_section();
+
+ /* If plugins have specified a section order, re-arrange input sections
+ according to a specified section order. If --section-ordering-file is
+ also specified, do not do anything here. */
+ if (parameters->options().has_plugins()
+ && layout->is_section_ordering_specified()
+ && !parameters->options().section_ordering_file ())
+ {
+ for (Layout::Section_list::const_iterator p
+ = layout->section_list().begin();
+ p != layout->section_list().end();
+ ++p)
+ (*p)->update_section_layout(layout->get_section_order_map());
+ }
if (parameters->options().gc_sections()
|| parameters->options().icf_enabled())
{
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- // Update the value of output_section stored in rd.
- Read_relocs_data* rd = (*p)->get_relocs_data();
- for (Read_relocs_data::Relocs_list::iterator q = rd->relocs.begin();
- q != rd->relocs.end();
- ++q)
- {
- q->output_section = (*p)->output_section(q->data_shndx);
- q->needs_special_offset_handling =
- (*p)->is_output_section_offset_invalid(q->data_shndx);
- }
- }
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ // Update the value of output_section stored in rd.
+ Read_relocs_data* rd = (*p)->get_relocs_data();
+ for (Read_relocs_data::Relocs_list::iterator q = rd->relocs.begin();
+ q != rd->relocs.end();
+ ++q)
+ {
+ q->output_section = (*p)->output_section(q->data_shndx);
+ q->needs_special_offset_handling =
+ (*p)->is_output_section_offset_invalid(q->data_shndx);
+ }
+ }
}
- // We have to support the case of not seeing any input objects, and
- // generate an empty file. Existing builds depend on being able to
- // pass an empty archive to the linker and get an empty object file
- // out. In order to do this we need to use a default target.
- if (input_objects->number_of_input_objects() == 0
- && layout->incremental_base() == NULL)
- parameters_force_valid_target();
-
int thread_count = options.thread_count_middle();
if (thread_count == 0)
thread_count = std::max(2, input_objects->number_of_input_objects());
for (++p; p != input_objects->relobj_end(); ++p)
{
if ((*p)->uses_split_stack() != uses_split_stack)
- gold_fatal(_("cannot mix split-stack '%s' and "
- "non-split-stack '%s' when using -r"),
- (*input_objects->relobj_begin())->name().c_str(),
- (*p)->name().c_str());
+ {
+ const char *name1
+ = (*input_objects->relobj_begin())->name().c_str();
+ const char *name2 = (*p)->name().c_str();
+ const char *name_split = uses_split_stack ? name1 : name2;
+ const char *name_nosplit = uses_split_stack ? name2 : name1;
+ gold_fatal(_("cannot mix split-stack '%s' and "
+ "non-split-stack '%s' when using -r"),
+ name_split, name_nosplit);
+ }
}
}
}
// dynamic objects that it depends upon.
input_objects->check_dynamic_dependencies();
- // See if any of the input definitions violate the One Definition Rule.
- // TODO: if this is too slow, do this as a task, rather than inline.
- symtab->detect_odr_violations(task, options.output_file_name());
-
// Do the --no-undefined-version check.
if (!parameters->options().undefined_version())
{
// Define symbols from any linker scripts.
layout->define_script_symbols(symtab);
+ // TODO(csilvers): figure out a more principled way to get the target
+ Target* target = const_cast<Target*>(¶meters->target());
+
// Attach sections to segments.
- layout->attach_sections_to_segments();
+ layout->attach_sections_to_segments(target);
if (!parameters->options().relocatable())
{
// Define __start and __stop symbols for output sections where
// appropriate.
layout->define_section_symbols(symtab);
+
+ // Define target-specific symbols.
+ target->define_standard_symbols(symtab, layout);
}
// Make sure we have symbols for any required group signatures.
|| parameters->options().icf_enabled())
{
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
+ p != input_objects->relobj_end();
+ ++p)
{
Task_token* next_blocker = new Task_token(true);
next_blocker->add_blocker();
- workqueue->queue(new Scan_relocs(symtab, layout, *p,
+ workqueue->queue(new Scan_relocs(symtab, layout, *p,
(*p)->get_relocs_data(),
this_blocker, next_blocker));
this_blocker = next_blocker;
// some of the sections, and thus change our minds about the types
// of references made to the symbols.
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
+ p != input_objects->relobj_end();
+ ++p)
+ {
Task_token* next_blocker = new Task_token(true);
next_blocker->add_blocker();
- workqueue->queue(new Read_relocs(symtab, layout, *p, this_blocker,
+ workqueue->queue(new Read_relocs(symtab, layout, *p, this_blocker,
next_blocker));
this_blocker = next_blocker;
- }
+ }
}
if (this_blocker == NULL)
// blocker here so that we can run the layout task immediately.
this_blocker = new Task_token(true);
}
- else
+ else
{
// If we failed to open any input files, it's possible for
// THIS_BLOCKER to be NULL here. There's no real point in
// When all those tasks are complete, we can start laying out the
// output file.
- // TODO(csilvers): figure out a more principled way to get the target
- Target* target = const_cast<Target*>(¶meters->target());
workqueue->queue(new Task_function(new Layout_task_runner(options,
input_objects,
symtab,
- target,
+ target,
layout,
mapfile),
this_blocker,
Workqueue* workqueue,
Output_file* of)
{
+ Timer* timer = parameters->timer();
+ if (timer != NULL)
+ timer->stamp(1);
+
int thread_count = options.thread_count_final();
if (thread_count == 0)
thread_count = std::max(2, input_objects->number_of_input_objects());
if (!any_postprocessing_sections)
{
input_sections_blocker = new Task_token(true);
+ // Write_symbols_task, Relocate_tasks.
+ input_sections_blocker->add_blocker();
input_sections_blocker->add_blockers(input_objects->number_of_relobjs());
}
// Queue a task to write out the output sections.
workqueue->queue(new Write_sections_task(layout, of, output_sections_blocker,
+ input_sections_blocker,
final_blocker));
// Queue a task to write out everything else.
final_blocker = new_final_blocker;
}
- // Queue a task to close the output file. This will be blocked by
- // FINAL_BLOCKER.
- workqueue->queue(new Task_function(new Close_task_runner(&options, layout,
- of),
- final_blocker,
- "Task_function Close_task_runner"));
+ // Create tasks for tree-style build ID computation, if necessary.
+ if (strcmp(options.build_id(), "tree") == 0)
+ {
+ // Queue a task to compute the build id. This will be blocked by
+ // FINAL_BLOCKER, and will in turn schedule the task to close
+ // the output file.
+ workqueue->queue(new Task_function(new Build_id_task_runner(&options,
+ layout,
+ of),
+ final_blocker,
+ "Task_function Build_id_task_runner"));
+ }
+ else
+ {
+ // Queue a task to close the output file. This will be blocked by
+ // FINAL_BLOCKER.
+ workqueue->queue(new Task_function(new Close_task_runner(&options, layout,
+ of, NULL, 0),
+ final_blocker,
+ "Task_function Close_task_runner"));
+ }
+
}
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff