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* dirsearch.cc (Dirsearch::initialize): Add all blockers before

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queueing any tasks.
	* gold.cc (queue_middle_gc_tasks): Likewise.  Fix final blocker.
	(queue_middle_tasks): Add all blockers before queueing any tasks.
	(queue_final_tasks): Likewise.
	* token.h (Task_token::add_blockers): New function.
	* object.h (Input_objects::number_of_relobjs): New function.
This commit is contained in:
Ian Lance Taylor 2010-02-11 07:42:17 +00:00
parent 612bdda138
commit fa17a3f432
5 changed files with 56 additions and 41 deletions
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10
gold/ChangeLog
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@ -1,3 +1,13 @@
2010-02-10 Ian Lance Taylor <iant@google.com>
* dirsearch.cc (Dirsearch::initialize): Add all blockers before
queueing any tasks.
* gold.cc (queue_middle_gc_tasks): Likewise. Fix final blocker.
(queue_middle_tasks): Add all blockers before queueing any tasks.
(queue_final_tasks): Likewise.
* token.h (Task_token::add_blockers): New function.
* object.h (Input_objects::number_of_relobjs): New function.
2010-02-10 Ian Lance Taylor <iant@google.com>
* i386.cc (Relocate::relocate_tls): A local symbol is final if not

6
gold/dirsearch.cc
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@ -1,6 +1,6 @@
// dirsearch.cc -- directory searching for gold
// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
@ -229,14 +229,12 @@ Dirsearch::initialize(Workqueue* workqueue,
gold_assert(caches == NULL);
caches = new Dir_caches;
this->directories_ = directories;
this->token_.add_blockers(directories->size());
for (General_options::Dir_list::const_iterator p = directories->begin();
p != directories->end();
++p)
{
this->token_.add_blocker();
workqueue->queue(new Dir_cache_task(p->name().c_str(), this->token_));
}
}
// Search for a file. NOTE: we only log failed file-lookup attempts
// here. Successfully lookups will eventually get logged in

39
gold/gold.cc
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@ -266,24 +266,20 @@ queue_middle_gc_tasks(const General_options& options,
// Read_relocs for all the objects must be done and processed to find
// unused sections before any scanning of the relocs can take place.
Task_token* blocker = new Task_token(true);
blocker->add_blockers(input_objects->number_of_relobjs());
Task_token* symtab_lock = new Task_token(false);
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
p != input_objects->relobj_end();
++p)
{
// We can read and process the relocations in any order.
blocker->add_blocker();
workqueue->queue(new Read_relocs(symtab, layout, *p, symtab_lock,
blocker));
}
Task_token* this_blocker = new Task_token(true);
workqueue->queue(new Task_function(new Middle_runner(options,
input_objects,
symtab,
layout,
mapfile),
this_blocker,
blocker,
"Task_function Middle_runner"));
}
@ -480,6 +476,10 @@ queue_middle_tasks(const General_options& options,
layout->define_group_signatures(symtab);
Task_token* blocker = new Task_token(true);
blocker->add_blockers(input_objects->number_of_relobjs());
if (parameters->options().define_common())
blocker->add_blocker();
Task_token* symtab_lock = new Task_token(false);
// If doing garbage collection, the relocations have already been read.
@ -490,13 +490,10 @@ queue_middle_tasks(const General_options& options,
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
p != input_objects->relobj_end();
++p)
{
blocker->add_blocker();
workqueue->queue(new Scan_relocs(symtab, layout, *p,
(*p)->get_relocs_data(),
symtab_lock, blocker));
}
}
else
{
// Read the relocations of the input files. We do this to find
@ -519,7 +516,6 @@ queue_middle_tasks(const General_options& options,
// So we queue up a task for each object to read the
// relocations. That task will in turn queue a task to wait
// until it can write to the symbol table.
blocker->add_blocker();
workqueue->queue(new Read_relocs(symtab, layout, *p, symtab_lock,
blocker));
}
@ -528,11 +524,8 @@ queue_middle_tasks(const General_options& options,
// Allocate common symbols. This requires write access to the
// symbol table, but is independent of the relocation processing.
if (parameters->options().define_common())
{
blocker->add_blocker();
workqueue->queue(new Allocate_commons_task(symtab, layout, mapfile,
symtab_lock, blocker));
}
// When all those tasks are complete, we can start laying out the
// output file.
@ -570,17 +563,26 @@ queue_final_tasks(const General_options& options,
// written out.
Task_token* input_sections_blocker = NULL;
if (!any_postprocessing_sections)
{
input_sections_blocker = new Task_token(true);
input_sections_blocker->add_blockers(input_objects->number_of_relobjs());
}
// Use a blocker to block any objects which have to wait for the
// output sections to complete before they can apply relocations.
Task_token* output_sections_blocker = new Task_token(true);
output_sections_blocker->add_blocker();
// Use a blocker to block the final cleanup task.
Task_token* final_blocker = new Task_token(true);
// Write_symbols_task, Write_sections_task, Write_data_task,
// Relocate_tasks.
final_blocker->add_blockers(3);
final_blocker->add_blockers(input_objects->number_of_relobjs());
if (!any_postprocessing_sections)
final_blocker->add_blocker();
// Queue a task to write out the symbol table.
final_blocker->add_blocker();
workqueue->queue(new Write_symbols_task(layout,
symtab,
input_objects,
@ -590,13 +592,10 @@ queue_final_tasks(const General_options& options,
final_blocker));
// Queue a task to write out the output sections.
output_sections_blocker->add_blocker();
final_blocker->add_blocker();
workqueue->queue(new Write_sections_task(layout, of, output_sections_blocker,
final_blocker));
// Queue a task to write out everything else.
final_blocker->add_blocker();
workqueue->queue(new Write_data_task(layout, symtab, of, final_blocker));
// Queue a task for each input object to relocate the sections and
@ -604,15 +603,10 @@ queue_final_tasks(const General_options& options,
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
p != input_objects->relobj_end();
++p)
{
if (input_sections_blocker != NULL)
input_sections_blocker->add_blocker();
final_blocker->add_blocker();
workqueue->queue(new Relocate_task(symtab, layout, *p, of,
input_sections_blocker,
output_sections_blocker,
final_blocker));
}
// Queue a task to write out the output sections which depend on
// input sections. If there are any sections which require
@ -620,7 +614,6 @@ queue_final_tasks(const General_options& options,
// the output file.
if (!any_postprocessing_sections)
{
final_blocker->add_blocker();
Task* t = new Write_after_input_sections_task(layout, of,
input_sections_blocker,
final_blocker);

5
gold/object.h
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@ -2009,6 +2009,11 @@ class Input_objects
any_dynamic() const
{ return !this->dynobj_list_.empty(); }
// Return the number of non dynamic objects.
int
number_of_relobjs() const
{ return this->relobj_list_.size(); }
// Return the number of input objects.
int
number_of_input_objects() const

11
gold/token.h
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@ -1,6 +1,6 @@
// token.h -- lock tokens for gold -*- C++ -*-
// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
// Copyright 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
@ -144,6 +144,15 @@ class Task_token
this->writer_ = NULL;
}
// Add some number of blockers to the token.
void
add_blockers(int c)
{
gold_assert(this->is_blocker_);
this->blockers_ += c;
this->writer_ = NULL;
}
// Remove a blocker from the token. Returns true if block count
// drops to zero.
bool