[deliverable/binutils-gdb.git] / gold / readsyms.h

// readsyms.h -- read input file symbols for gold   -*- C++ -*-

// Copyright (C) 2006-2014 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of gold.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.

#ifndef GOLD_READSYMS_H
#define GOLD_READSYMS_H

#include <vector>

#include "workqueue.h"
#include "object.h"
#include "incremental.h"

namespace gold
{

class Input_objects;
class Symbol_table;
class Input_group;
class Archive;
class Finish_group;

// This Task is responsible for reading the symbols from an input
// file.  This also includes reading the relocations so that we can
// check for any that require a PLT and/or a GOT.  After the data has
// been read, this queues up another task to actually add the symbols
// to the symbol table.  The tasks are separated because the file
// reading can occur in parallel but adding the symbols must be done
// in the order of the input files.

class Read_symbols : public Task
{
 public:
  // DIRPATH is the list of directories to search for libraries.
  // INPUT is the file to read.  INPUT_GROUP is not NULL if we are in
  // the middle of an input group.  THIS_BLOCKER is used to prevent
  // the associated Add_symbols task from running before the previous
  // one has completed; it will be NULL for the first task.
  // NEXT_BLOCKER is used to block the next input file from adding
  // symbols.
  Read_symbols(Input_objects* input_objects, Symbol_table* symtab,
	       Layout* layout, Dirsearch* dirpath, int dirindex,
	       Mapfile* mapfile, const Input_argument* input_argument,
	       Input_group* input_group, Archive_member* member,
               Task_token* this_blocker, Task_token* next_blocker)
    : input_objects_(input_objects), symtab_(symtab), layout_(layout),
      dirpath_(dirpath), dirindex_(dirindex), mapfile_(mapfile),
      input_argument_(input_argument), input_group_(input_group),
      member_(member), this_blocker_(this_blocker),
      next_blocker_(next_blocker)
  { }

  ~Read_symbols();

  // If appropriate, issue a warning about skipping an incompatible
  // object.
  static void
  incompatible_warning(const Input_argument*, const Input_file*);

  // Requeue a Read_symbols task to search for the next object with
  // the same name.
  static void
  requeue(Workqueue*, Input_objects*, Symbol_table*, Layout*, Dirsearch*,
	  int dirindex, Mapfile*, const Input_argument*, Input_group*,
	  Task_token* next_blocker);

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const;

 private:
  // Handle an archive group.
  void
  do_group(Workqueue*);

  // Handle --start-lib ... --end-lib
  bool
  do_lib_group(Workqueue*);

  // Handle --whole-archive --start-lib ... --end-lib --no-whole-archive
  bool
  do_whole_lib_group(Workqueue*);

  // Open and identify the file.
  bool
  do_read_symbols(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_;
  Archive_member* member_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This Task handles adding the symbols to the symbol table.  These
// tasks must be run in the same order as the arguments appear on the
// command line.

class Add_symbols : public Task
{
 public:
  // THIS_BLOCKER is used to prevent this task from running before the
  // one for the previous input file.  NEXT_BLOCKER is used to prevent
  // the next task from running.
  Add_symbols(Input_objects* input_objects, Symbol_table* symtab,
	      Layout* layout, Dirsearch* /*dirpath*/, int /*dirindex*/,
	      Mapfile* /*mapfile*/, const Input_argument* input_argument,
	      Object* object, Incremental_library* library,
	      Read_symbols_data* sd, Task_token* this_blocker,
	      Task_token* next_blocker)
    : input_objects_(input_objects), symtab_(symtab), layout_(layout),
      input_argument_(input_argument), object_(object), library_(library),
      sd_(sd), this_blocker_(this_blocker), next_blocker_(next_blocker)
  { }

  ~Add_symbols();

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  { return "Add_symbols " + this->object_->name(); }

private:
  Input_objects* input_objects_;
  Symbol_table* symtab_;
  Layout* layout_;
  const Input_argument* input_argument_;
  Object* object_;
  Incremental_library* library_;
  Read_symbols_data* sd_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This Task is responsible for reading the symbols from an archive
// member that has changed since the last incremental link.

class Read_member : public Task
{
 public:
  // INPUT is the file to read.  INPUT_GROUP is not NULL if we are in
  // the middle of an input group.  THIS_BLOCKER is used to prevent
  // the associated Add_symbols task from running before the previous
  // one has completed; it will be NULL for the first task.
  // NEXT_BLOCKER is used to block the next input file from adding
  // symbols.
  Read_member(Input_objects* /*input_objects*/, Symbol_table* /*symtab*/,
	      Layout* /*layout*/, Mapfile* /*mapfile*/,
	      const Incremental_binary::Input_reader* input_reader,
              Task_token* this_blocker, Task_token* next_blocker)
    : input_reader_(input_reader),
      this_blocker_(this_blocker), next_blocker_(next_blocker)
  { }

  ~Read_member();

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  {
    return (std::string("Read_member ") + this->input_reader_->filename());
  }

 private:
  const Incremental_binary::Input_reader* input_reader_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This Task is responsible for processing an input script file that has
// not changed since the last incremental link.

class Check_script : public Task
{
 public:
  Check_script(Layout* layout, Incremental_binary* ibase,
	       unsigned int input_file_index,
	       const Incremental_binary::Input_reader* input_reader,
	       Task_token* this_blocker, Task_token* next_blocker)
    : layout_(layout), ibase_(ibase), input_file_index_(input_file_index),
      input_reader_(input_reader), this_blocker_(this_blocker),
      next_blocker_(next_blocker)
  {
    this->filename_ = std::string(this->input_reader_->filename());
  }

  ~Check_script();

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  {
    return (std::string("Check_script ") + this->input_reader_->filename());
  }

 private:
  std::string filename_;
  Layout* layout_;
  Incremental_binary* ibase_;
  unsigned int input_file_index_;
  const Incremental_binary::Input_reader* input_reader_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This Task is responsible for processing an archive library that has
// not changed since the last incremental link.

class Check_library : public Task
{
 public:
  Check_library(Symbol_table* /*symtab*/, Layout* layout,
		Incremental_binary* ibase,
		unsigned int input_file_index,
		const Incremental_binary::Input_reader* input_reader,
		Task_token* this_blocker, Task_token* next_blocker)
    : layout_(layout), ibase_(ibase),
      input_file_index_(input_file_index), input_reader_(input_reader),
      this_blocker_(this_blocker), next_blocker_(next_blocker)
  { }

  ~Check_library();

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  {
    return (std::string("Check_library ") + this->input_reader_->filename());
  }

 private:
  Layout* layout_;
  Incremental_binary* ibase_;
  unsigned int input_file_index_;
  const Incremental_binary::Input_reader* input_reader_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This class is used to track the archives in a group.

class Input_group
{
 public:
  typedef std::vector<Archive*> Archives;
  typedef Archives::const_iterator const_iterator;

  Input_group()
    : archives_()
  { }

  ~Input_group();

  // Add an archive to the group.
  void
  add_archive(Archive* arch)
  { this->archives_.push_back(arch); }

  // Loop over the archives in the group.

  const_iterator
  begin() const
  { return this->archives_.begin(); }

  const_iterator
  end() const
  { return this->archives_.end(); }

 private:
  Archives archives_;
};

// This class starts the handling of a group.  It exists only to pick
// up the number of undefined symbols at that point, so that we only
// run back through the group if we saw a new undefined symbol.

class Start_group : public Task
{
 public:
  Start_group(Symbol_table* symtab, Finish_group* finish_group,
	      Task_token* this_blocker, Task_token* next_blocker)
    : symtab_(symtab), finish_group_(finish_group),
      this_blocker_(this_blocker), next_blocker_(next_blocker)
  { }

  ~Start_group();

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  { return "Start_group"; }

 private:
  Symbol_table* symtab_;
  Finish_group* finish_group_;
  Task_token* this_blocker_;
  Task_token* next_blocker_;
};

// This class is used to finish up handling a group.  It is just a
// closure.

class Finish_group : public Task
{
 public:
  Finish_group(Input_objects* input_objects, Symbol_table* symtab,
	       Layout* layout, Mapfile* mapfile, Input_group* input_group,
	       Task_token* next_blocker)
    : input_objects_(input_objects), symtab_(symtab),
      layout_(layout), mapfile_(mapfile), input_group_(input_group),
      saw_undefined_(0), this_blocker_(NULL), next_blocker_(next_blocker)
  { }

  ~Finish_group();

  // Set the number of undefined symbols when we start processing the
  // group.  This is called by the Start_group task.
  void
  set_saw_undefined(size_t saw_undefined)
  { this->saw_undefined_ = saw_undefined; }

  // Set the blocker to use for this task.
  void
  set_blocker(Task_token* this_blocker)
  {
    gold_assert(this->this_blocker_ == NULL);
    this->this_blocker_ = this_blocker;
  }

  // The standard Task methods.

  Task_token*
  is_runnable();

  void
  locks(Task_locker*);

  void
  run(Workqueue*);

  std::string
  get_name() const
  { return "Finish_group"; }

 private:
  Input_objects* input_objects_;
  Symbol_table* symtab_;
  Layout* layout_;
  Mapfile* mapfile_;
  Input_group* input_group_;
  size_t saw_undefined_;
  Task_token* this_blocker_;
  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(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
	      int dirindex, Input_objects* input_objects, Mapfile* mapfile,
	      Input_group* input_group, const Input_argument* input_argument,
	      Input_file* input_file, Task_token* this_blocker,
	      Task_token* next_blocker)
    : symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex),
      input_objects_(input_objects), mapfile_(mapfile),
      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:
  Symbol_table* symtab_;
  Layout* layout_;
  Dirsearch* dirpath_;
  int dirindex_;
  Input_objects* input_objects_;
  Mapfile* mapfile_;
  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)
Commit	Line	Data
bae7f79e ILT	1	// readsyms.h -- read input file symbols for gold -- C++ --
bae7f79e ILT	2
4b95cf5c	3	// Copyright (C) 2006-2014 Free Software Foundation, Inc.
6cb15b7f ILT	4	// Written by Ian Lance Taylor <iant@google.com>.
	5
	6	// This file is part of gold.
	7
	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.
	12
	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.
	17
	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.
	22
bae7f79e ILT	23	#ifndef GOLD_READSYMS_H
	24	#define GOLD_READSYMS_H
	25
ead1e424 ILT	26	#include <vector>
ead1e424 ILT	27
bae7f79e ILT	28	#include "workqueue.h"
bae7f79e ILT	29	#include "object.h"
cdc29364	30	#include "incremental.h"
bae7f79e ILT	31
	32	namespace gold
	33	{
	34
54dc6425 ILT	35	class Input_objects;
54dc6425 ILT	36	class Symbol_table;
ead1e424 ILT	37	class Input_group;
ead1e424 ILT	38	class Archive;
114dfbe1	39	class Finish_group;
54dc6425	40
bae7f79e ILT	41	// This Task is responsible for reading the symbols from an input
	42	// file. This also includes reading the relocations so that we can
	43	// check for any that require a PLT and/or a GOT. After the data has
	44	// been read, this queues up another task to actually add the symbols
	45	// to the symbol table. The tasks are separated because the file
	46	// reading can occur in parallel but adding the symbols must be done
	47	// in the order of the input files.
	48
	49	class Read_symbols : public Task
	50	{
	51	public:
	52	// DIRPATH is the list of directories to search for libraries.
ead1e424 ILT	53	// INPUT is the file to read. INPUT_GROUP is not NULL if we are in
	54	// the middle of an input group. THIS_BLOCKER is used to prevent
	55	// the associated Add_symbols task from running before the previous
	56	// one has completed; it will be NULL for the first task.
	57	// NEXT_BLOCKER is used to block the next input file from adding
	58	// symbols.
f1ed28fb	59	Read_symbols(Input_objects* input_objects, Symbol_table* symtab,
15f8229b ILT	60	Layout* layout, Dirsearch* dirpath, int dirindex,
15f8229b ILT	61	Mapfile* mapfile, const Input_argument* input_argument,
b0193076 RÁE	62	Input_group* input_group, Archive_member* member,
b0193076 RÁE	63	Task_token* this_blocker, Task_token* next_blocker)
f1ed28fb	64	: input_objects_(input_objects), symtab_(symtab), layout_(layout),
15f8229b ILT	65	dirpath_(dirpath), dirindex_(dirindex), mapfile_(mapfile),
15f8229b ILT	66	input_argument_(input_argument), input_group_(input_group),
b0193076 RÁE	67	member_(member), this_blocker_(this_blocker),
b0193076 RÁE	68	next_blocker_(next_blocker)
bae7f79e ILT	69	{ }
	70
	71	~Read_symbols();
	72
15f8229b ILT	73	// If appropriate, issue a warning about skipping an incompatible
	74	// object.
	75	static void
	76	incompatible_warning(const Input_argument, const Input_file);
	77
	78	// Requeue a Read_symbols task to search for the next object with
	79	// the same name.
	80	static void
	81	requeue(Workqueue, Input_objects, Symbol_table, Layout, Dirsearch*,
	82	int dirindex, Mapfile, const Input_argument, Input_group*,
	83	Task_token* next_blocker);
	84
bae7f79e ILT	85	// The standard Task methods.
bae7f79e ILT	86
17a1d0a9 ILT	87	Task_token*
17a1d0a9 ILT	88	is_runnable();
bae7f79e	89
17a1d0a9 ILT	90	void
17a1d0a9 ILT	91	locks(Task_locker*);
bae7f79e ILT	92
	93	void
	94	run(Workqueue*);
	95
c7912668 ILT	96	std::string
	97	get_name() const;
	98
bae7f79e	99	private:
ead1e424 ILT	100	// Handle an archive group.
	101	void
	102	do_group(Workqueue*);
	103
b0193076 RÁE	104	// Handle --start-lib ... --end-lib
	105	bool
	106	do_lib_group(Workqueue*);
	107
	108	// Handle --whole-archive --start-lib ... --end-lib --no-whole-archive
	109	bool
	110	do_whole_lib_group(Workqueue*);
	111
ee6d2efe ILT	112	// Open and identify the file.
	113	bool
	114	do_read_symbols(Workqueue*);
	115
54dc6425	116	Input_objects* input_objects_;
14bfc3f5	117	Symbol_table* symtab_;
12e14209	118	Layout* layout_;
17a1d0a9	119	Dirsearch* dirpath_;
15f8229b	120	int dirindex_;
7d9e3d98	121	Mapfile* mapfile_;
dbe717ef	122	const Input_argument* input_argument_;
ead1e424	123	Input_group* input_group_;
b0193076	124	Archive_member* member_;
bae7f79e ILT	125	Task_token* this_blocker_;
	126	Task_token* next_blocker_;
	127	};
	128
	129	// This Task handles adding the symbols to the symbol table. These
	130	// tasks must be run in the same order as the arguments appear on the
	131	// command line.
	132
	133	class Add_symbols : public Task
	134	{
	135	public:
	136	// THIS_BLOCKER is used to prevent this task from running before the
	137	// one for the previous input file. NEXT_BLOCKER is used to prevent
	138	// the next task from running.
7e1edb90	139	Add_symbols(Input_objects* input_objects, Symbol_table* symtab,
43819297 RM	140	Layout* layout, Dirsearch* /dirpath/, int /dirindex/,
43819297 RM	141	Mapfile* /mapfile/, const Input_argument* input_argument,
cdc29364	142	Object* object, Incremental_library* library,
f6ce93d6 ILT	143	Read_symbols_data* sd, Task_token* this_blocker,
f6ce93d6 ILT	144	Task_token* next_blocker)
7e1edb90	145	: input_objects_(input_objects), symtab_(symtab), layout_(layout),
cdc29364 CC	146	input_argument_(input_argument), object_(object), library_(library),
cdc29364 CC	147	sd_(sd), this_blocker_(this_blocker), next_blocker_(next_blocker)
bae7f79e ILT	148	{ }
	149
	150	~Add_symbols();
	151
	152	// The standard Task methods.
	153
17a1d0a9 ILT	154	Task_token*
17a1d0a9 ILT	155	is_runnable();
bae7f79e	156
17a1d0a9 ILT	157	void
17a1d0a9 ILT	158	locks(Task_locker*);
bae7f79e ILT	159
	160	void
	161	run(Workqueue*);
	162
c7912668 ILT	163	std::string
	164	get_name() const
	165	{ return "Add_symbols " + this->object_->name(); }
	166
bae7f79e	167	private:
ead1e424	168	Input_objects* input_objects_;
14bfc3f5	169	Symbol_table* symtab_;
12e14209	170	Layout* layout_;
15f8229b	171	const Input_argument* input_argument_;
bae7f79e	172	Object* object_;
cdc29364	173	Incremental_library* library_;
12e14209	174	Read_symbols_data* sd_;
bae7f79e ILT	175	Task_token* this_blocker_;
	176	Task_token* next_blocker_;
	177	};
	178
cdc29364 CC	179	// This Task is responsible for reading the symbols from an archive
	180	// member that has changed since the last incremental link.
	181
	182	class Read_member : public Task
	183	{
	184	public:
	185	// INPUT is the file to read. INPUT_GROUP is not NULL if we are in
	186	// the middle of an input group. THIS_BLOCKER is used to prevent
	187	// the associated Add_symbols task from running before the previous
	188	// one has completed; it will be NULL for the first task.
	189	// NEXT_BLOCKER is used to block the next input file from adding
	190	// symbols.
43819297 RM	191	Read_member(Input_objects* /input_objects/, Symbol_table* /symtab/,
43819297 RM	192	Layout* /layout/, Mapfile* /mapfile/,
cdc29364 CC	193	const Incremental_binary::Input_reader* input_reader,
cdc29364 CC	194	Task_token* this_blocker, Task_token* next_blocker)
43819297	195	: input_reader_(input_reader),
cdc29364 CC	196	this_blocker_(this_blocker), next_blocker_(next_blocker)
	197	{ }
	198
	199	~Read_member();
	200
	201	// The standard Task methods.
	202
	203	Task_token*
	204	is_runnable();
	205
	206	void
	207	locks(Task_locker*);
	208
	209	void
	210	run(Workqueue*);
	211
	212	std::string
	213	get_name() const
	214	{
	215	return (std::string("Read_member ") + this->input_reader_->filename());
	216	}
	217
	218	private:
cdc29364 CC	219	const Incremental_binary::Input_reader* input_reader_;
	220	Task_token* this_blocker_;
	221	Task_token* next_blocker_;
	222	};
	223
	224	// This Task is responsible for processing an input script file that has
	225	// not changed since the last incremental link.
	226
	227	class Check_script : public Task
	228	{
	229	public:
	230	Check_script(Layout* layout, Incremental_binary* ibase,
	231	unsigned int input_file_index,
	232	const Incremental_binary::Input_reader* input_reader,
	233	Task_token* this_blocker, Task_token* next_blocker)
	234	: layout_(layout), ibase_(ibase), input_file_index_(input_file_index),
	235	input_reader_(input_reader), this_blocker_(this_blocker),
	236	next_blocker_(next_blocker)
	237	{
	238	this->filename_ = std::string(this->input_reader_->filename());
	239	}
	240
	241	~Check_script();
	242
	243	// The standard Task methods.
	244
	245	Task_token*
	246	is_runnable();
	247
	248	void
	249	locks(Task_locker*);
	250
	251	void
	252	run(Workqueue*);
	253
	254	std::string
	255	get_name() const
	256	{
	257	return (std::string("Check_script ") + this->input_reader_->filename());
	258	}
	259
	260	private:
	261	std::string filename_;
	262	Layout* layout_;
	263	Incremental_binary* ibase_;
	264	unsigned int input_file_index_;
	265	const Incremental_binary::Input_reader* input_reader_;
	266	Task_token* this_blocker_;
	267	Task_token* next_blocker_;
	268	};
	269
	270	// This Task is responsible for processing an archive library that has
	271	// not changed since the last incremental link.
	272
	273	class Check_library : public Task
	274	{
	275	public:
43819297	276	Check_library(Symbol_table* /symtab/, Layout* layout,
cdc29364 CC	277	Incremental_binary* ibase,
	278	unsigned int input_file_index,
	279	const Incremental_binary::Input_reader* input_reader,
	280	Task_token* this_blocker, Task_token* next_blocker)
43819297	281	: layout_(layout), ibase_(ibase),
cdc29364 CC	282	input_file_index_(input_file_index), input_reader_(input_reader),
	283	this_blocker_(this_blocker), next_blocker_(next_blocker)
	284	{ }
	285
	286	~Check_library();
	287
	288	// The standard Task methods.
	289
	290	Task_token*
	291	is_runnable();
	292
	293	void
	294	locks(Task_locker*);
	295
	296	void
	297	run(Workqueue*);
	298
	299	std::string
	300	get_name() const
	301	{
	302	return (std::string("Check_library ") + this->input_reader_->filename());
	303	}
	304
	305	private:
	306	Layout* layout_;
cdc29364 CC	307	Incremental_binary* ibase_;
	308	unsigned int input_file_index_;
	309	const Incremental_binary::Input_reader* input_reader_;
	310	Task_token* this_blocker_;
	311	Task_token* next_blocker_;
	312	};
	313
ead1e424 ILT	314	// This class is used to track the archives in a group.
	315
	316	class Input_group
	317	{
	318	public:
	319	typedef std::vector<Archive*> Archives;
	320	typedef Archives::const_iterator const_iterator;
	321
	322	Input_group()
	323	: archives_()
	324	{ }
	325
0f3b89d8 ILT	326	~Input_group();
0f3b89d8 ILT	327
ead1e424 ILT	328	// Add an archive to the group.
	329	void
	330	add_archive(Archive* arch)
	331	{ this->archives_.push_back(arch); }
	332
	333	// Loop over the archives in the group.
	334
	335	const_iterator
	336	begin() const
	337	{ return this->archives_.begin(); }
	338
	339	const_iterator
	340	end() const
	341	{ return this->archives_.end(); }
	342
	343	private:
	344	Archives archives_;
	345	};
	346
114dfbe1 ILT	347	// This class starts the handling of a group. It exists only to pick
	348	// up the number of undefined symbols at that point, so that we only
	349	// run back through the group if we saw a new undefined symbol.
	350
	351	class Start_group : public Task
	352	{
	353	public:
	354	Start_group(Symbol_table* symtab, Finish_group* finish_group,
	355	Task_token* this_blocker, Task_token* next_blocker)
	356	: symtab_(symtab), finish_group_(finish_group),
	357	this_blocker_(this_blocker), next_blocker_(next_blocker)
	358	{ }
	359
	360	~Start_group();
	361
	362	// The standard Task methods.
	363
	364	Task_token*
	365	is_runnable();
	366
	367	void
	368	locks(Task_locker*);
	369
	370	void
	371	run(Workqueue*);
	372
	373	std::string
	374	get_name() const
	375	{ return "Start_group"; }
	376
	377	private:
	378	Symbol_table* symtab_;
	379	Finish_group* finish_group_;
	380	Task_token* this_blocker_;
	381	Task_token* next_blocker_;
	382	};
	383
ead1e424 ILT	384	// This class is used to finish up handling a group. It is just a
	385	// closure.
	386
	387	class Finish_group : public Task
	388	{
	389	public:
7e1edb90	390	Finish_group(Input_objects* input_objects, Symbol_table* symtab,
7d9e3d98	391	Layout* layout, Mapfile* mapfile, Input_group* input_group,
ead1e424	392	Task_token* next_blocker)
7e1edb90	393	: input_objects_(input_objects), symtab_(symtab),
7d9e3d98	394	layout_(layout), mapfile_(mapfile), input_group_(input_group),
114dfbe1	395	saw_undefined_(0), this_blocker_(NULL), next_blocker_(next_blocker)
ead1e424 ILT	396	{ }
	397
	398	~Finish_group();
	399
114dfbe1 ILT	400	// Set the number of undefined symbols when we start processing the
	401	// group. This is called by the Start_group task.
	402	void
	403	set_saw_undefined(size_t saw_undefined)
	404	{ this->saw_undefined_ = saw_undefined; }
	405
	406	// Set the blocker to use for this task.
	407	void
	408	set_blocker(Task_token* this_blocker)
	409	{
	410	gold_assert(this->this_blocker_ == NULL);
	411	this->this_blocker_ = this_blocker;
	412	}
	413
ead1e424 ILT	414	// The standard Task methods.
ead1e424 ILT	415
17a1d0a9 ILT	416	Task_token*
17a1d0a9 ILT	417	is_runnable();
ead1e424	418
17a1d0a9 ILT	419	void
17a1d0a9 ILT	420	locks(Task_locker*);
ead1e424 ILT	421
	422	void
	423	run(Workqueue*);
	424
c7912668 ILT	425	std::string
	426	get_name() const
	427	{ return "Finish_group"; }
	428
ead1e424 ILT	429	private:
	430	Input_objects* input_objects_;
	431	Symbol_table* symtab_;
	432	Layout* layout_;
7d9e3d98	433	Mapfile* mapfile_;
ead1e424	434	Input_group* input_group_;
114dfbe1	435	size_t saw_undefined_;
ead1e424 ILT	436	Task_token* this_blocker_;
	437	Task_token* next_blocker_;
	438	};
	439
da769d56 ILT	440	// This class is used to read a file which was not recognized as an
	441	// object or archive. It tries to read it as a linker script, using
	442	// the tokens to serialize with the calls to Add_symbols.
	443
	444	class Read_script : public Task
	445	{
	446	public:
f1ed28fb	447	Read_script(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
15f8229b	448	int dirindex, Input_objects* input_objects, Mapfile* mapfile,
f1ed28fb	449	Input_group* input_group, const Input_argument* input_argument,
da769d56 ILT	450	Input_file* input_file, Task_token* this_blocker,
da769d56 ILT	451	Task_token* next_blocker)
15f8229b	452	: symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex),
7d9e3d98 ILT	453	input_objects_(input_objects), mapfile_(mapfile),
	454	input_group_(input_group), input_argument_(input_argument),
	455	input_file_(input_file), this_blocker_(this_blocker),
	456	next_blocker_(next_blocker)
da769d56 ILT	457	{ }
	458
	459	~Read_script();
	460
	461	// The standard Task methods.
	462
	463	Task_token*
	464	is_runnable();
	465
	466	void
	467	locks(Task_locker*);
	468
	469	void
	470	run(Workqueue*);
	471
	472	std::string
	473	get_name() const;
	474
	475	private:
da769d56 ILT	476	Symbol_table* symtab_;
	477	Layout* layout_;
	478	Dirsearch* dirpath_;
15f8229b	479	int dirindex_;
da769d56	480	Input_objects* input_objects_;
7d9e3d98	481	Mapfile* mapfile_;
da769d56 ILT	482	Input_group* input_group_;
	483	const Input_argument* input_argument_;
	484	Input_file* input_file_;
	485	Task_token* this_blocker_;
	486	Task_token* next_blocker_;
	487	};
	488
bae7f79e ILT	489	} // end namespace gold
	490
	491	#endif // !defined(GOLD_READSYMS_H)