serialization.
// If we didn't queue a new task, then we need to explicitly unblock
// the token.
if (!this->do_read_symbols(workqueue))
- workqueue->queue_front(new Unblock_token(this->this_blocker_,
- this->next_blocker_));
+ workqueue->queue_soon(new Unblock_token(this->this_blocker_,
+ this->next_blocker_));
}
// Open the file and read the symbols. Return true if a new task was
input_file->file().unlock(this);
- workqueue->queue_front(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_,
+ obj, sd,
+ this->this_blocker_,
+ this->next_blocker_));
return true;
}
input_file);
arch->setup(this);
- workqueue->queue_front(new Add_archive_symbols(this->symtab_,
- this->layout_,
- this->input_objects_,
- arch,
- this->input_group_,
- this->this_blocker_,
- this->next_blocker_));
+ workqueue->queue_next(new Add_archive_symbols(this->symtab_,
+ this->layout_,
+ this->input_objects_,
+ arch,
+ this->input_group_,
+ this->this_blocker_,
+ this->next_blocker_));
return true;
}
}
- // Try to parse this file as a script.
- if (read_input_script(workqueue, this->options_, this->symtab_,
- this->layout_, this->dirpath_, this->input_objects_,
- this->input_group_, this->input_argument_, input_file,
- ehdr_buf, read_size, this->this_blocker_,
- this->next_blocker_))
- return true;
-
- // Here we have to handle any other input file types we need.
- gold_error(_("%s: not an object or archive"),
- input_file->file().filename().c_str());
-
- return false;
+ // Queue up a task to try to parse this file as a script. We use a
+ // separate task so that the script will be read in order with other
+ // objects named on the command line. Also so that we don't try to
+ // read multiple scripts simultaneously, which could lead to
+ // unpredictable changes to the General_options structure.
+
+ workqueue->queue_soon(new Read_script(this->options_,
+ this->symtab_,
+ this->layout_,
+ this->dirpath_,
+ this->input_objects_,
+ this->input_group_,
+ this->input_argument_,
+ input_file,
+ this->this_blocker_,
+ this->next_blocker_));
+ return true;
}
// Handle a group. We need to walk through the arguments over and
Task_token* next_blocker = new Task_token(true);
next_blocker->add_blocker();
- workqueue->queue(new Read_symbols(this->options_, this->input_objects_,
- this->symtab_, this->layout_,
- this->dirpath_, arg, input_group,
- this_blocker, next_blocker));
+ workqueue->queue_soon(new Read_symbols(this->options_,
+ this->input_objects_,
+ this->symtab_, this->layout_,
+ this->dirpath_, arg, input_group,
+ this_blocker, next_blocker));
this_blocker = next_blocker;
}
const int saw_undefined = this->symtab_->saw_undefined();
- workqueue->queue(new Finish_group(this->input_objects_,
- this->symtab_,
- this->layout_,
- input_group,
- saw_undefined,
- this_blocker,
- this->next_blocker_));
+ workqueue->queue_soon(new Finish_group(this->input_objects_,
+ this->symtab_,
+ this->layout_,
+ input_group,
+ saw_undefined,
+ this_blocker,
+ this->next_blocker_));
}
// Return a debugging name for a Read_symbols task.
delete this->input_group_;
}
+// Class Read_script
+
+Read_script::~Read_script()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the next
+ // input file.
+}
+
+// We are blocked by this_blocker_.
+
+Task_token*
+Read_script::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+// We don't unlock next_blocker_ here. If the script names any input
+// files, then the last file will be responsible for unlocking it.
+
+void
+Read_script::locks(Task_locker*)
+{
+}
+
+// Read the script, if it is a script.
+
+void
+Read_script::run(Workqueue* workqueue)
+{
+ bool used_next_blocker;
+ if (!read_input_script(workqueue, this->options_, this->symtab_,
+ this->layout_, this->dirpath_, this->input_objects_,
+ this->input_group_, this->input_argument_,
+ this->input_file_, this->next_blocker_,
+ &used_next_blocker))
+ {
+ // Here we have to handle any other input file types we need.
+ gold_error(_("%s: not an object or archive"),
+ this->input_file_->file().filename().c_str());
+ }
+
+ if (!used_next_blocker)
+ {
+ // Queue up a task to unlock next_blocker. We can't just unlock
+ // it here, as we don't hold the workqueue lock.
+ workqueue->queue_soon(new Unblock_token(NULL, this->next_blocker_));
+ }
+}
+
+// Return a debugging name for a Read_script task.
+
+std::string
+Read_script::get_name() const
+{
+ std::string ret("Read_script ");
+ if (this->input_argument_->file().is_lib())
+ ret += "-l";
+ ret += this->input_argument_->file().name();
+ return ret;
+}
+
} // End namespace gold.
Task_token* next_blocker_;
};
+// This class is used to read a file which was not recognized as an
+// object or archive. It tries to read it as a linker script, using
+// the tokens to serialize with the calls to Add_symbols.
+
+class Read_script : public Task
+{
+ public:
+ Read_script(const General_options& options, Symbol_table* symtab,
+ Layout* layout, Dirsearch* dirpath, Input_objects* input_objects,
+ Input_group* input_group, const Input_argument* input_argument,
+ Input_file* input_file, Task_token* this_blocker,
+ Task_token* next_blocker)
+ : options_(options), symtab_(symtab), layout_(layout), dirpath_(dirpath),
+ input_objects_(input_objects), input_group_(input_group),
+ input_argument_(input_argument), input_file_(input_file),
+ this_blocker_(this_blocker), next_blocker_(next_blocker)
+ { }
+
+ ~Read_script();
+
+ // The standard Task methods.
+
+ Task_token*
+ is_runnable();
+
+ void
+ locks(Task_locker*);
+
+ void
+ run(Workqueue*);
+
+ std::string
+ get_name() const;
+
+ private:
+ const General_options& options_;
+ Symbol_table* symtab_;
+ Layout* layout_;
+ Dirsearch* dirpath_;
+ Input_objects* input_objects_;
+ Input_group* input_group_;
+ const Input_argument* input_argument_;
+ Input_file* input_file_;
+ Task_token* this_blocker_;
+ Task_token* next_blocker_;
+};
+
} // end namespace gold
#endif // !defined(GOLD_READSYMS_H)
this->object_->read_relocs(rd);
this->object_->release();
- workqueue->queue_front(new Scan_relocs(this->options_, this->symtab_,
- this->layout_, this->object_, rd,
- this->symtab_lock_, this->blocker_));
+ workqueue->queue_next(new Scan_relocs(this->options_, this->symtab_,
+ this->layout_, this->object_, rd,
+ this->symtab_lock_, this->blocker_));
}
// Return a debugging name for the task.
return &this->token_;
}
-// A trivial task which waits for THIS_BLOCKER to be clear and then
-// clears NEXT_BLOCKER. THIS_BLOCKER may be NULL.
-
-class Script_unblock : public Task
-{
- public:
- Script_unblock(Task_token* this_blocker, Task_token* next_blocker)
- : this_blocker_(this_blocker), next_blocker_(next_blocker)
- { }
-
- ~Script_unblock()
- {
- if (this->this_blocker_ != NULL)
- delete this->this_blocker_;
- }
-
- Task_token*
- is_runnable()
- {
- if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
- return this->this_blocker_;
- return NULL;
- }
-
- void
- locks(Task_locker* tl)
- { tl->add(this, this->next_blocker_); }
-
- void
- run(Workqueue*)
- { }
-
- std::string
- get_name() const
- { return "Script_unblock"; }
-
- private:
- Task_token* this_blocker_;
- Task_token* next_blocker_;
-};
-
// class Symbol_assignment.
// Add the symbol to the symbol table. This makes sure the symbol is
};
// FILE was found as an argument on the command line. Try to read it
-// as a script. We've already read BYTES of data into P, but we
-// ignore that. Return true if the file was handled.
+// as a script. Return true if the file was handled.
bool
read_input_script(Workqueue* workqueue, const General_options& options,
Dirsearch* dirsearch, Input_objects* input_objects,
Input_group* input_group,
const Input_argument* input_argument,
- Input_file* input_file, const unsigned char*, off_t,
- Task_token* this_blocker, Task_token* next_blocker)
+ Input_file* input_file, Task_token* next_blocker,
+ bool* used_next_blocker)
{
+ *used_next_blocker = false;
+
std::string input_string;
Lex::read_file(input_file, &input_string);
if (yyparse(&closure) != 0)
return false;
- // THIS_BLOCKER must be clear before we may add anything to the
- // symbol table. We are responsible for unblocking NEXT_BLOCKER
- // when we are done. We are responsible for deleting THIS_BLOCKER
- // when it is unblocked.
-
if (!closure.saw_inputs())
- {
- // The script did not add any files to read. Note that we are
- // not permitted to call NEXT_BLOCKER->unblock() here even if
- // THIS_BLOCKER is NULL, as we do not hold the workqueue lock.
- workqueue->queue(new Script_unblock(this_blocker, next_blocker));
- return true;
- }
+ return true;
+ Task_token* this_blocker = NULL;
for (Input_arguments::const_iterator p = closure.inputs()->begin();
p != closure.inputs()->end();
++p)
nb = new Task_token(true);
nb->add_blocker();
}
- workqueue->queue(new Read_symbols(options, input_objects, symtab,
- layout, dirsearch, &*p,
- input_group, this_blocker, nb));
+ workqueue->queue_soon(new Read_symbols(options, input_objects, symtab,
+ layout, dirsearch, &*p,
+ input_group, this_blocker, nb));
this_blocker = nb;
}
+ *used_next_blocker = true;
+
return true;
}
};
// FILE was found as an argument on the command line, but was not
-// recognized as an ELF file. Try to read it as a script. We've
-// already read BYTES of data into P. Return true if the file was
-// handled. This has to handle /usr/lib/libc.so on a GNU/Linux
-// system.
+// recognized as an ELF file. Try to read it as a script. Return
+// true if the file was handled. This has to handle /usr/lib/libc.so
+// on a GNU/Linux system. *USED_NEXT_BLOCKER is set to indicate
+// whether the function took over NEXT_BLOCKER.
bool
read_input_script(Workqueue*, const General_options&, Symbol_table*, Layout*,
Dirsearch*, Input_objects*, Input_group*,
- const Input_argument*, Input_file*, const unsigned char* p,
- off_t bytes, Task_token* this_blocker,
- Task_token* next_blocker);
+ const Input_argument*, Input_file*,
+ Task_token* next_blocker, bool* used_next_blocker);
// FILE was found as an argument to --script (-T).
// Read it as a script, and execute its contents immediately.
empty() const
{ return this->head_ == NULL; }
+ // Add T to the head of the list.
+ void
+ push_front(Task* t);
+
// Add T to the end of the list.
void
push_back(Task* t);
add_waiting(Task* t)
{ this->waiting_.push_back(t); }
+ // Add T to the front of the list of tasks waiting for this token to
+ // be released.
+ void
+ add_waiting_front(Task* t)
+ { this->waiting_.push_front(t); }
+
// Remove the first Task waiting for this token to be released, and
// return it. Return NULL if no Tasks are waiting.
Task*
}
}
+// Add T to the front of the list.
+
+inline void
+Task_list::push_front(Task* t)
+{
+ gold_assert(t->list_next() == NULL);
+ if (this->head_ == NULL)
+ {
+ this->head_ = t;
+ this->tail_ = t;
+ }
+ else
+ {
+ t->set_list_next(this->head_);
+ this->head_ = t;
+ }
+}
+
// Remove and return the first Task waiting for this lock to be
// released.
// waiting for a Token.
void
-Workqueue::add_to_queue(Task_list* queue, Task* t)
+Workqueue::add_to_queue(Task_list* queue, Task* t, bool front)
{
Hold_lock hl(this->lock_);
Task_token* token = t->is_runnable();
if (token != NULL)
{
- token->add_waiting(t);
+ if (front)
+ token->add_waiting_front(t);
+ else
+ token->add_waiting(t);
++this->waiting_;
}
else
{
- queue->push_back(t);
+ if (front)
+ queue->push_front(t);
+ else
+ queue->push_back(t);
// Tell any waiting thread that there is work to do.
this->condvar_.signal();
}
void
Workqueue::queue(Task* t)
{
- this->add_to_queue(&this->tasks_, t);
+ this->add_to_queue(&this->tasks_, t, false);
+}
+
+// Queue a task which should run soon.
+
+void
+Workqueue::queue_soon(Task* t)
+{
+ t->set_should_run_soon();
+ this->add_to_queue(&this->first_tasks_, t, false);
}
-// Add a task to the front of the queue.
+// Queue a task which should run next.
void
-Workqueue::queue_front(Task* t)
+Workqueue::queue_next(Task* t)
{
t->set_should_run_soon();
- this->add_to_queue(&this->first_tasks_, t);
+ this->add_to_queue(&this->first_tasks_, t, true);
}
// Return whether to cancel the current thread.
void
queue(Task*);
- // Add a new task to the front of the work queue. It will be the
- // next task to run if it is ready.
+ // Add a new task to the work queue which should run soon. If the
+ // task is ready, it will be run before any tasks added using
+ // queue().
void
- queue_front(Task*);
+ queue_soon(Task*);
+
+ // Add a new task to the work queue which should run next if it is
+ // ready.
+ void
+ queue_next(Task*);
// Process all the tasks on the work queue. This function runs
// until all tasks have completed. The argument is the thread
// Add a task to a queue.
void
- add_to_queue(Task_list* queue, Task* t);
+ add_to_queue(Task_list* queue, Task* t, bool front);
// Find a runnable task, or wait for one.
Task*
projects / external / binutils.git / commitdiff