// readsyms.cc -- read input file symbols for gold
-// Copyright 2006, 2007, 2008, 2009 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 "script.h"
#include "readsyms.h"
#include "plugin.h"
+#include "layout.h"
+#include "incremental.h"
namespace gold
{
// Add_symbols task.
}
+// If appropriate, issue a warning about skipping an incompatible
+// file.
+
+void
+Read_symbols::incompatible_warning(const Input_argument* input_argument,
+ const Input_file* input_file)
+{
+ if (parameters->options().warn_search_mismatch())
+ gold_warning("skipping incompatible %s while searching for %s",
+ input_file->filename().c_str(),
+ input_argument->file().name());
+}
+
+// Requeue a Read_symbols task to search for the next object with the
+// same name.
+
+void
+Read_symbols::requeue(Workqueue* workqueue, Input_objects* input_objects,
+ Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
+ int dirindex, Mapfile* mapfile,
+ const Input_argument* input_argument,
+ Input_group* input_group, Task_token* next_blocker)
+{
+ // Bump the directory search index.
+ ++dirindex;
+
+ // We don't need to worry about this_blocker, since we already
+ // reached it. However, we are removing the blocker on next_blocker
+ // because the calling task is completing. So we need to add a new
+ // blocker. Since next_blocker may be shared by several tasks, we
+ // need to increment the count with the workqueue lock held.
+ workqueue->add_blocker(next_blocker);
+
+ workqueue->queue(new Read_symbols(input_objects, symtab, layout, dirpath,
+ dirindex, mapfile, input_argument,
+ input_group, NULL, NULL, next_blocker));
+}
+
// Return whether a Read_symbols task is runnable. We can read an
// ordinary input file immediately. For an archive specified using
// -l, we have to wait until the search path is complete.
// locks here.
void
-Read_symbols::locks(Task_locker*)
+Read_symbols::locks(Task_locker* tl)
{
+ if (this->member_ != NULL)
+ tl->add(this, this->next_blocker_);
}
// Run a Read_symbols task.
Read_symbols::run(Workqueue* workqueue)
{
// If we didn't queue a new task, then we need to explicitly unblock
- // the token.
- if (!this->do_read_symbols(workqueue))
+ // the token. If the object is a member of a lib group, however,
+ // the token was already added to the list of locks for the task,
+ // and it will be unblocked automatically at the end of the task.
+ if (!this->do_read_symbols(workqueue) && this->member_ == NULL)
workqueue->queue_soon(new Unblock_token(this->this_blocker_,
this->next_blocker_));
}
+// Handle a whole lib group. Other than collecting statistics, this just
+// mimics what we do for regular object files in the command line.
+
+bool
+Read_symbols::do_whole_lib_group(Workqueue* workqueue)
+{
+ const Input_file_lib* lib_group = this->input_argument_->lib();
+
+ ++Lib_group::total_lib_groups;
+
+ Task_token* this_blocker = this->this_blocker_;
+ for (Input_file_lib::const_iterator i = lib_group->begin();
+ i != lib_group->end();
+ ++i)
+ {
+ ++Lib_group::total_members;
+ ++Lib_group::total_members_loaded;
+
+ const Input_argument* arg = &*i;
+
+ Task_token* next_blocker;
+ if (i != lib_group->end() - 1)
+ {
+ next_blocker = new Task_token(true);
+ next_blocker->add_blocker();
+ }
+ else
+ next_blocker = this->next_blocker_;
+
+ workqueue->queue_soon(new Read_symbols(this->input_objects_,
+ this->symtab_, this->layout_,
+ this->dirpath_, this->dirindex_,
+ this->mapfile_, arg, NULL,
+ NULL, this_blocker, next_blocker));
+ this_blocker = next_blocker;
+ }
+
+ return true;
+}
+
+// Handle a lib group. We set Read_symbols Tasks as usual, but have them
+// just record the symbol data instead of adding the objects. We also start
+// a Add_lib_group_symbols Task which runs after we've read all the symbols.
+// In that task we process the members in a loop until we are done.
+
+bool
+Read_symbols::do_lib_group(Workqueue* workqueue)
+{
+ const Input_file_lib* lib_group = this->input_argument_->lib();
+
+ if (lib_group->options().whole_archive())
+ return this->do_whole_lib_group(workqueue);
+
+ Lib_group* lib = new Lib_group(lib_group, this);
+
+ Add_lib_group_symbols* add_lib_group_symbols =
+ new Add_lib_group_symbols(this->symtab_, this->layout_,
+ this->input_objects_,
+ lib, this->next_blocker_);
+
+
+ Task_token* next_blocker = new Task_token(true);
+ int j = 0;
+ for (Input_file_lib::const_iterator i = lib_group->begin();
+ i != lib_group->end();
+ ++i, ++j)
+ {
+ const Input_argument* arg = &*i;
+ Archive_member* m = lib->get_member(j);
+
+ next_blocker->add_blocker();
+
+ // Since this Read_symbols will not create an Add_symbols,
+ // just pass NULL as this_blocker.
+ workqueue->queue_soon(new Read_symbols(this->input_objects_,
+ this->symtab_, this->layout_,
+ this->dirpath_, this->dirindex_,
+ this->mapfile_, arg, NULL,
+ m, NULL, next_blocker));
+ }
+
+ add_lib_group_symbols->set_blocker(next_blocker, this->this_blocker_);
+ workqueue->queue_soon(add_lib_group_symbols);
+
+ return true;
+}
+
// Open the file and read the symbols. Return true if a new task was
// queued, false if that could not happen due to some error.
return true;
}
+ if (this->input_argument_->is_lib())
+ return this->do_lib_group(workqueue);
+
Input_file* input_file = new Input_file(&this->input_argument_->file());
- if (!input_file->open(*this->dirpath_, this))
+ if (!input_file->open(*this->dirpath_, this, &this->dirindex_))
return false;
// Read enough of the file to pick up the entire ELF header.
return false;
}
- int read_size = elfcpp::Elf_sizes<64>::ehdr_size;
- if (filesize < read_size)
- read_size = filesize;
-
- const unsigned char* ehdr = input_file->file().get_view(0, 0, read_size,
- true, false);
+ const unsigned char* ehdr;
+ int read_size;
+ bool is_elf = is_elf_object(input_file, 0, &ehdr, &read_size);
if (read_size >= Archive::sarmag)
{
bool is_thin_archive
= memcmp(ehdr, Archive::armagt, Archive::sarmag) == 0;
- if (is_thin_archive
+ if (is_thin_archive
|| memcmp(ehdr, Archive::armag, Archive::sarmag) == 0)
{
// This is an archive.
Archive* arch = new Archive(this->input_argument_->file().name(),
input_file, is_thin_archive,
this->dirpath_, this);
- arch->setup(this->input_objects_);
-
+ arch->setup();
+
// Unlock the archive so it can be used in the next task.
arch->unlock(this);
workqueue->queue_next(new Add_archive_symbols(this->symtab_,
this->layout_,
this->input_objects_,
+ this->dirpath_,
+ this->dirindex_,
this->mapfile_,
+ this->input_argument_,
arch,
this->input_group_,
this->this_blocker_,
}
}
+ Object* elf_obj = NULL;
+ bool unconfigured;
+ bool* punconfigured = NULL;
+ if (is_elf)
+ {
+ // This is an ELF object.
+
+ unconfigured = false;
+ punconfigured = (input_file->will_search_for()
+ ? &unconfigured
+ : NULL);
+ elf_obj = make_elf_object(input_file->filename(),
+ input_file, 0, ehdr, read_size,
+ punconfigured);
+ }
+
if (parameters->options().has_plugins())
{
Pluginobj* obj = parameters->options().plugins()->claim_file(input_file,
- 0, filesize);
+ 0, filesize,
+ elf_obj);
if (obj != NULL)
{
+ // Delete the elf_obj, this file has been claimed.
+ if (elf_obj != NULL)
+ delete elf_obj;
+
// The input file was claimed by a plugin, and its symbols
// have been provided by the plugin.
// We are done with the file at this point, so unlock it.
obj->unlock(this);
+ if (this->member_ != NULL)
+ {
+ this->member_->sd_ = NULL;
+ this->member_->obj_ = obj;
+ return true;
+ }
+
workqueue->queue_next(new Add_symbols(this->input_objects_,
this->symtab_,
this->layout_,
- obj, NULL,
+ this->dirpath_,
+ this->dirindex_,
+ this->mapfile_,
+ this->input_argument_,
+ obj,
+ NULL,
+ NULL,
this->this_blocker_,
this->next_blocker_));
return true;
}
}
- if (read_size >= 4)
+ if (is_elf)
{
- static unsigned char elfmagic[4] =
- {
- elfcpp::ELFMAG0, elfcpp::ELFMAG1,
- elfcpp::ELFMAG2, elfcpp::ELFMAG3
- };
- if (memcmp(ehdr, elfmagic, 4) == 0)
- {
- // This is an ELF object.
+ // This is an ELF object.
- Object* obj = make_elf_object(input_file->filename(),
- input_file, 0, ehdr, read_size);
- if (obj == NULL)
- return false;
+ if (elf_obj == NULL)
+ {
+ if (unconfigured)
+ {
+ Read_symbols::incompatible_warning(this->input_argument_,
+ input_file);
+ input_file->file().release();
+ input_file->file().unlock(this);
+ delete input_file;
+ ++this->dirindex_;
+ return this->do_read_symbols(workqueue);
+ }
+ return false;
+ }
- Read_symbols_data* sd = new Read_symbols_data;
- obj->read_symbols(sd);
+ Read_symbols_data* sd = new Read_symbols_data;
+ elf_obj->read_symbols(sd);
- // Opening the file locked it, so now we need to unlock it.
- // We need to unlock it before queuing the Add_symbols task,
- // because the workqueue doesn't know about our lock on the
- // file. If we queue the Add_symbols task first, it will be
- // stuck on the end of the file lock, but since the
- // workqueue doesn't know about that lock, it will never
- // release the Add_symbols task.
+ // Opening the file locked it, so now we need to unlock it. We
+ // need to unlock it before queuing the Add_symbols task,
+ // because the workqueue doesn't know about our lock on the
+ // file. If we queue the Add_symbols task first, it will be
+ // stuck on the end of the file lock, but since the workqueue
+ // doesn't know about that lock, it will never release the
+ // Add_symbols task.
- input_file->file().unlock(this);
+ input_file->file().unlock(this);
- // We use queue_next because everything is cached for this
- // task to run right away if possible.
+ if (this->member_ != NULL)
+ {
+ this->member_->sd_ = sd;
+ this->member_->obj_ = elf_obj;
+ this->member_->arg_serial_ =
+ this->input_argument_->file().arg_serial();
+ return true;
+ }
- workqueue->queue_next(new Add_symbols(this->input_objects_,
- this->symtab_, this->layout_,
- obj, sd,
- this->this_blocker_,
- this->next_blocker_));
+ // We use queue_next because everything is cached for this
+ // task to run right away if possible.
+
+ workqueue->queue_next(new Add_symbols(this->input_objects_,
+ this->symtab_, this->layout_,
+ this->dirpath_,
+ this->dirindex_,
+ this->mapfile_,
+ this->input_argument_,
+ elf_obj,
+ NULL,
+ sd,
+ this->this_blocker_,
+ this->next_blocker_));
- return true;
- }
+ return true;
}
// Queue up a task to try to parse this file as a script. We use a
workqueue->queue_soon(new Read_script(this->symtab_,
this->layout_,
this->dirpath_,
+ this->dirindex_,
this->input_objects_,
this->mapfile_,
this->input_group_,
const Input_file_group* group = this->input_argument_->group();
Task_token* this_blocker = this->this_blocker_;
+ Finish_group* finish_group = new Finish_group(this->input_objects_,
+ this->symtab_,
+ this->layout_,
+ this->mapfile_,
+ input_group,
+ this->next_blocker_);
+
+ Task_token* next_blocker = new Task_token(true);
+ next_blocker->add_blocker();
+ workqueue->queue_soon(new Start_group(this->symtab_, finish_group,
+ this_blocker, next_blocker));
+ this_blocker = next_blocker;
+
for (Input_file_group::const_iterator p = group->begin();
p != group->end();
++p)
const Input_argument* arg = &*p;
gold_assert(arg->is_file());
- Task_token* next_blocker = new Task_token(true);
+ next_blocker = new Task_token(true);
next_blocker->add_blocker();
workqueue->queue_soon(new Read_symbols(this->input_objects_,
this->symtab_, this->layout_,
- this->dirpath_, this->mapfile_,
- arg, input_group,
- this_blocker, next_blocker));
+ this->dirpath_, this->dirindex_,
+ this->mapfile_, arg, input_group,
+ NULL, this_blocker, next_blocker));
this_blocker = next_blocker;
}
- const int saw_undefined = this->symtab_->saw_undefined();
- workqueue->queue_soon(new Finish_group(this->input_objects_,
- this->symtab_,
- this->layout_,
- this->mapfile_,
- input_group,
- saw_undefined,
- this_blocker,
- this->next_blocker_));
+ finish_group->set_blocker(this_blocker);
+
+ workqueue->queue_soon(finish_group);
}
// Return a debugging name for a Read_symbols task.
std::string
Read_symbols::get_name() const
{
- if (!this->input_argument_->is_group())
+ if (this->input_argument_->is_group())
+ {
+ std::string ret("Read_symbols group (");
+ bool add_space = false;
+ const Input_file_group* group = this->input_argument_->group();
+ for (Input_file_group::const_iterator p = group->begin();
+ p != group->end();
+ ++p)
+ {
+ if (add_space)
+ ret += ' ';
+ ret += p->file().name();
+ add_space = true;
+ }
+ return ret + ')';
+ }
+ else if (this->input_argument_->is_lib())
+ {
+ std::string ret("Read_symbols lib (");
+ bool add_space = false;
+ const Input_file_lib* lib = this->input_argument_->lib();
+ for (Input_file_lib::const_iterator p = lib->begin();
+ p != lib->end();
+ ++p)
+ {
+ if (add_space)
+ ret += ' ';
+ ret += p->file().name();
+ add_space = true;
+ }
+ return ret + ')';
+ }
+ else
{
std::string ret("Read_symbols ");
if (this->input_argument_->file().is_lib())
ret += "-l";
+ else if (this->input_argument_->file().is_searched_file())
+ ret += "-l:";
ret += this->input_argument_->file().name();
return ret;
}
-
- std::string ret("Read_symbols group (");
- bool add_space = false;
- const Input_file_group* group = this->input_argument_->group();
- for (Input_file_group::const_iterator p = group->begin();
- p != group->end();
- ++p)
- {
- if (add_space)
- ret += ' ';
- ret += p->file().name();
- add_space = true;
- }
- return ret + ')';
}
// Class Add_symbols.
Add_symbols::locks(Task_locker* tl)
{
tl->add(this, this->next_blocker_);
- tl->add(this, this->object_->token());
+ Task_token* token = this->object_->token();
+ if (token != NULL)
+ tl->add(this, token);
}
// Add the symbols in the object to the symbol table.
if (!this->input_objects_->add_object(this->object_))
{
- // FIXME: We need to close the descriptor here.
+ this->object_->discard_decompressed_sections();
+ gold_assert(this->sd_ != NULL);
+ delete this->sd_;
+ this->sd_ = NULL;
+ this->object_->release();
delete this->object_;
}
else
{
+ Incremental_inputs* incremental_inputs =
+ this->layout_->incremental_inputs();
+ if (incremental_inputs != NULL)
+ {
+ if (this->library_ != NULL && !this->library_->is_reported())
+ {
+ Incremental_binary* ibase = this->layout_->incremental_base();
+ gold_assert(ibase != NULL);
+ unsigned int lib_serial = this->library_->arg_serial();
+ unsigned int lib_index = this->library_->input_file_index();
+ Script_info* lib_script_info = ibase->get_script_info(lib_index);
+ incremental_inputs->report_archive_begin(this->library_,
+ lib_serial,
+ lib_script_info);
+ }
+ unsigned int arg_serial = this->input_argument_->file().arg_serial();
+ Script_info* script_info = this->input_argument_->script_info();
+ incremental_inputs->report_object(this->object_, arg_serial,
+ this->library_, script_info);
+ }
this->object_->layout(this->symtab_, this->layout_, this->sd_);
this->object_->add_symbols(this->symtab_, this->sd_, this->layout_);
+ this->object_->discard_decompressed_sections();
+ delete this->sd_;
+ this->sd_ = NULL;
this->object_->release();
}
- delete this->sd_;
- this->sd_ = NULL;
+}
+
+// Class Read_member.
+
+Read_member::~Read_member()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the next
+ // input file.
+}
+
+// Return whether a Read_member task is runnable.
+
+Task_token*
+Read_member::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+void
+Read_member::locks(Task_locker* tl)
+{
+ tl->add(this, this->next_blocker_);
+}
+
+// Run a Read_member task.
+
+void
+Read_member::run(Workqueue*)
+{
+ // This task doesn't need to do anything for now. The Read_symbols task
+ // that is queued for the archive library will cause the archive to be
+ // processed from scratch.
+}
+
+// Class Check_script.
+
+Check_script::~Check_script()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the next
+ // input file.
+}
+
+// Return whether a Check_script task is runnable.
+
+Task_token*
+Check_script::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+void
+Check_script::locks(Task_locker* tl)
+{
+ tl->add(this, this->next_blocker_);
+}
+
+// Run a Check_script task.
+
+void
+Check_script::run(Workqueue*)
+{
+ Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
+ gold_assert(incremental_inputs != NULL);
+ unsigned int arg_serial = this->input_reader_->arg_serial();
+ Script_info* script_info =
+ this->ibase_->get_script_info(this->input_file_index_);
+ Timespec mtime = this->input_reader_->get_mtime();
+ incremental_inputs->report_script(script_info, arg_serial, mtime);
+}
+
+// Class Check_library.
+
+Check_library::~Check_library()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the next
+ // input file.
+}
+
+// Return whether a Check_library task is runnable.
+
+Task_token*
+Check_library::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+void
+Check_library::locks(Task_locker* tl)
+{
+ tl->add(this, this->next_blocker_);
+}
+
+// Run a Check_library task.
+
+void
+Check_library::run(Workqueue*)
+{
+ Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
+ gold_assert(incremental_inputs != NULL);
+ Incremental_library* lib = this->ibase_->get_library(this->input_file_index_);
+ gold_assert(lib != NULL);
+ lib->copy_unused_symbols();
+ // FIXME: Check that unused symbols remain unused.
+ if (!lib->is_reported())
+ {
+ unsigned int lib_serial = lib->arg_serial();
+ unsigned int lib_index = lib->input_file_index();
+ Script_info* script_info = this->ibase_->get_script_info(lib_index);
+ incremental_inputs->report_archive_begin(lib, lib_serial, script_info);
+ }
+ incremental_inputs->report_archive_end(lib);
+}
+
+// Class Input_group.
+
+// When we delete an Input_group we can delete the archive
+// information.
+
+Input_group::~Input_group()
+{
+ for (Input_group::const_iterator p = this->begin();
+ p != this->end();
+ ++p)
+ delete *p;
+}
+
+// Class Start_group.
+
+Start_group::~Start_group()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the first
+ // file in the group.
+}
+
+// We need to wait for THIS_BLOCKER_ and unblock NEXT_BLOCKER_.
+
+Task_token*
+Start_group::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+void
+Start_group::locks(Task_locker* tl)
+{
+ tl->add(this, this->next_blocker_);
+}
+
+// Store the number of undefined symbols we see now.
+
+void
+Start_group::run(Workqueue*)
+{
+ this->finish_group_->set_saw_undefined(this->symtab_->saw_undefined());
}
// Class Finish_group.
void
Finish_group::run(Workqueue*)
{
- int saw_undefined = this->saw_undefined_;
+ size_t saw_undefined = this->saw_undefined_;
while (saw_undefined != this->symtab_->saw_undefined())
{
saw_undefined = this->symtab_->saw_undefined();
}
}
- // Delete all the archives now that we no longer need them.
+ // Now that we're done with the archives, record the incremental
+ // layout information.
for (Input_group::const_iterator p = this->input_group_->begin();
p != this->input_group_->end();
++p)
- delete *p;
- delete this->input_group_;
+ {
+ // For an incremental link, finish recording the layout information.
+ Incremental_inputs* incremental_inputs =
+ this->layout_->incremental_inputs();
+ if (incremental_inputs != NULL)
+ incremental_inputs->report_archive_end(*p);
+ }
+
+ if (parameters->options().has_plugins())
+ parameters->options().plugins()->save_input_group(this->input_group_);
+ else
+ delete this->input_group_;
}
// Class Read_script
{
bool used_next_blocker;
if (!read_input_script(workqueue, this->symtab_, this->layout_,
- this->dirpath_, this->input_objects_,
+ this->dirpath_, this->dirindex_, this->input_objects_,
this->mapfile_, this->input_group_,
this->input_argument_, this->input_file_,
this->next_blocker_, &used_next_blocker))
std::string ret("Read_script ");
if (this->input_argument_->file().is_lib())
ret += "-l";
+ else if (this->input_argument_->file().is_searched_file())
+ ret += "-l:";
ret += this->input_argument_->file().name();
return ret;
}
projects / deliverable / binutils-gdb.git / blobdiff