1 // readsyms.h -- read input file symbols for gold -*- C++ -*-
3 // Copyright 2006, 2007 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
23 #ifndef GOLD_READSYMS_H
24 #define GOLD_READSYMS_H
28 #include "workqueue.h"
39 // This Task is responsible for reading the symbols from an input
40 // file. This also includes reading the relocations so that we can
41 // check for any that require a PLT and/or a GOT. After the data has
42 // been read, this queues up another task to actually add the symbols
43 // to the symbol table. The tasks are separated because the file
44 // reading can occur in parallel but adding the symbols must be done
45 // in the order of the input files.
47 class Read_symbols
: public Task
50 // DIRPATH is the list of directories to search for libraries.
51 // INPUT is the file to read. INPUT_GROUP is not NULL if we are in
52 // the middle of an input group. THIS_BLOCKER is used to prevent
53 // the associated Add_symbols task from running before the previous
54 // one has completed; it will be NULL for the first task.
55 // NEXT_BLOCKER is used to block the next input file from adding
57 Read_symbols(const General_options
& options
, Input_objects
* input_objects
,
58 Symbol_table
* symtab
, Layout
* layout
, const Dirsearch
& dirpath
,
59 const Input_argument
* input_argument
, Input_group
* input_group
,
60 Task_token
* this_blocker
, Task_token
* next_blocker
)
61 : options_(options
), input_objects_(input_objects
), symtab_(symtab
),
62 layout_(layout
), dirpath_(dirpath
), input_argument_(input_argument
),
63 input_group_(input_group
), this_blocker_(this_blocker
),
64 next_blocker_(next_blocker
)
69 // The standard Task methods.
72 is_runnable(Workqueue
*);
81 // Handle an archive group.
85 // Open and identify the file.
87 do_read_symbols(Workqueue
*);
89 const General_options
& options_
;
90 Input_objects
* input_objects_
;
91 Symbol_table
* symtab_
;
93 const Dirsearch
& dirpath_
;
94 const Input_argument
* input_argument_
;
95 Input_group
* input_group_
;
96 Task_token
* this_blocker_
;
97 Task_token
* next_blocker_
;
100 // This Task handles adding the symbols to the symbol table. These
101 // tasks must be run in the same order as the arguments appear on the
104 class Add_symbols
: public Task
107 // THIS_BLOCKER is used to prevent this task from running before the
108 // one for the previous input file. NEXT_BLOCKER is used to prevent
109 // the next task from running.
110 Add_symbols(Input_objects
* input_objects
, Symbol_table
* symtab
,
111 Layout
* layout
, Object
* object
,
112 Read_symbols_data
* sd
, Task_token
* this_blocker
,
113 Task_token
* next_blocker
)
114 : input_objects_(input_objects
), symtab_(symtab
), layout_(layout
),
115 object_(object
), sd_(sd
), this_blocker_(this_blocker
),
116 next_blocker_(next_blocker
)
121 // The standard Task methods.
124 is_runnable(Workqueue
*);
133 class Add_symbols_locker
;
135 Input_objects
* input_objects_
;
136 Symbol_table
* symtab_
;
139 Read_symbols_data
* sd_
;
140 Task_token
* this_blocker_
;
141 Task_token
* next_blocker_
;
144 // This class is used to track the archives in a group.
149 typedef std::vector
<Archive
*> Archives
;
150 typedef Archives::const_iterator const_iterator
;
156 // Add an archive to the group.
158 add_archive(Archive
* arch
)
159 { this->archives_
.push_back(arch
); }
161 // Loop over the archives in the group.
165 { return this->archives_
.begin(); }
169 { return this->archives_
.end(); }
175 // This class is used to finish up handling a group. It is just a
178 class Finish_group
: public Task
181 Finish_group(Input_objects
* input_objects
, Symbol_table
* symtab
,
182 Layout
* layout
, Input_group
* input_group
,
183 int saw_undefined
, Task_token
* this_blocker
,
184 Task_token
* next_blocker
)
185 : input_objects_(input_objects
), symtab_(symtab
),
186 layout_(layout
), input_group_(input_group
),
187 saw_undefined_(saw_undefined
), this_blocker_(this_blocker
),
188 next_blocker_(next_blocker
)
193 // The standard Task methods.
196 is_runnable(Workqueue
*);
205 Input_objects
* input_objects_
;
206 Symbol_table
* symtab_
;
208 Input_group
* input_group_
;
210 Task_token
* this_blocker_
;
211 Task_token
* next_blocker_
;
214 } // end namespace gold
216 #endif // !defined(GOLD_READSYMS_H)