1 // readsyms.h -- read input file symbols for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008 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, 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.
84 // Handle an archive group.
88 // Open and identify the file.
90 do_read_symbols(Workqueue*);
92 const General_options& options_;
93 Input_objects* input_objects_;
94 Symbol_table* symtab_;
97 const Input_argument* input_argument_;
98 Input_group* input_group_;
99 Task_token* this_blocker_;
100 Task_token* next_blocker_;
103 // This Task handles adding the symbols to the symbol table. These
104 // tasks must be run in the same order as the arguments appear on the
107 class Add_symbols : public Task
110 // THIS_BLOCKER is used to prevent this task from running before the
111 // one for the previous input file. NEXT_BLOCKER is used to prevent
112 // the next task from running.
113 Add_symbols(Input_objects* input_objects, Symbol_table* symtab,
114 Layout* layout, Object* object,
115 Read_symbols_data* sd, Task_token* this_blocker,
116 Task_token* next_blocker)
117 : input_objects_(input_objects), symtab_(symtab), layout_(layout),
118 object_(object), sd_(sd), this_blocker_(this_blocker),
119 next_blocker_(next_blocker)
124 // The standard Task methods.
137 { return "Add_symbols " + this->object_->name(); }
140 Input_objects* input_objects_;
141 Symbol_table* symtab_;
144 Read_symbols_data* sd_;
145 Task_token* this_blocker_;
146 Task_token* next_blocker_;
149 // This class is used to track the archives in a group.
154 typedef std::vector<Archive*> Archives;
155 typedef Archives::const_iterator const_iterator;
161 // Add an archive to the group.
163 add_archive(Archive* arch)
164 { this->archives_.push_back(arch); }
166 // Loop over the archives in the group.
170 { return this->archives_.begin(); }
174 { return this->archives_.end(); }
180 // This class is used to finish up handling a group. It is just a
183 class Finish_group : public Task
186 Finish_group(Input_objects* input_objects, Symbol_table* symtab,
187 Layout* layout, Input_group* input_group,
188 int saw_undefined, Task_token* this_blocker,
189 Task_token* next_blocker)
190 : input_objects_(input_objects), symtab_(symtab),
191 layout_(layout), input_group_(input_group),
192 saw_undefined_(saw_undefined), this_blocker_(this_blocker),
193 next_blocker_(next_blocker)
198 // The standard Task methods.
211 { return "Finish_group"; }
214 Input_objects* input_objects_;
215 Symbol_table* symtab_;
217 Input_group* input_group_;
219 Task_token* this_blocker_;
220 Task_token* next_blocker_;
223 // This class is used to read a file which was not recognized as an
224 // object or archive. It tries to read it as a linker script, using
225 // the tokens to serialize with the calls to Add_symbols.
227 class Read_script : public Task
230 Read_script(const General_options& options, Symbol_table* symtab,
231 Layout* layout, Dirsearch* dirpath, Input_objects* input_objects,
232 Input_group* input_group, const Input_argument* input_argument,
233 Input_file* input_file, Task_token* this_blocker,
234 Task_token* next_blocker)
235 : options_(options), symtab_(symtab), layout_(layout), dirpath_(dirpath),
236 input_objects_(input_objects), input_group_(input_group),
237 input_argument_(input_argument), input_file_(input_file),
238 this_blocker_(this_blocker), next_blocker_(next_blocker)
243 // The standard Task methods.
258 const General_options& options_;
259 Symbol_table* symtab_;
262 Input_objects* input_objects_;
263 Input_group* input_group_;
264 const Input_argument* input_argument_;
265 Input_file* input_file_;
266 Task_token* this_blocker_;
267 Task_token* next_blocker_;
270 } // end namespace gold
272 #endif // !defined(GOLD_READSYMS_H)