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bae7f79e ILT |
1 | // readsyms.h -- read input file symbols for gold -*- C++ -*- |
2 | ||
ebdbb458 | 3 | // Copyright 2006, 2007, 2008 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> |
27 | ||
bae7f79e ILT |
28 | #include "workqueue.h" |
29 | #include "object.h" | |
30 | ||
31 | namespace gold | |
32 | { | |
33 | ||
54dc6425 ILT |
34 | class Input_objects; |
35 | class Symbol_table; | |
ead1e424 ILT |
36 | class Input_group; |
37 | class Archive; | |
54dc6425 | 38 | |
bae7f79e ILT |
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. | |
46 | ||
47 | class Read_symbols : public Task | |
48 | { | |
49 | public: | |
50 | // DIRPATH is the list of directories to search for libraries. | |
ead1e424 ILT |
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 | |
56 | // symbols. | |
f1ed28fb ILT |
57 | Read_symbols(Input_objects* input_objects, Symbol_table* symtab, |
58 | Layout* layout, Dirsearch* dirpath, Mapfile* mapfile, | |
59 | const Input_argument* input_argument, | |
7d9e3d98 ILT |
60 | Input_group* input_group, Task_token* this_blocker, |
61 | Task_token* next_blocker) | |
f1ed28fb ILT |
62 | : input_objects_(input_objects), symtab_(symtab), layout_(layout), |
63 | dirpath_(dirpath), mapfile_(mapfile), input_argument_(input_argument), | |
64 | input_group_(input_group), this_blocker_(this_blocker), | |
65 | next_blocker_(next_blocker) | |
bae7f79e ILT |
66 | { } |
67 | ||
68 | ~Read_symbols(); | |
69 | ||
70 | // The standard Task methods. | |
71 | ||
17a1d0a9 ILT |
72 | Task_token* |
73 | is_runnable(); | |
bae7f79e | 74 | |
17a1d0a9 ILT |
75 | void |
76 | locks(Task_locker*); | |
bae7f79e ILT |
77 | |
78 | void | |
79 | run(Workqueue*); | |
80 | ||
c7912668 ILT |
81 | std::string |
82 | get_name() const; | |
83 | ||
bae7f79e | 84 | private: |
ead1e424 ILT |
85 | // Handle an archive group. |
86 | void | |
87 | do_group(Workqueue*); | |
88 | ||
ee6d2efe ILT |
89 | // Open and identify the file. |
90 | bool | |
91 | do_read_symbols(Workqueue*); | |
92 | ||
54dc6425 | 93 | Input_objects* input_objects_; |
14bfc3f5 | 94 | Symbol_table* symtab_; |
12e14209 | 95 | Layout* layout_; |
17a1d0a9 | 96 | Dirsearch* dirpath_; |
7d9e3d98 | 97 | Mapfile* mapfile_; |
dbe717ef | 98 | const Input_argument* input_argument_; |
ead1e424 | 99 | Input_group* input_group_; |
bae7f79e ILT |
100 | Task_token* this_blocker_; |
101 | Task_token* next_blocker_; | |
102 | }; | |
103 | ||
104 | // This Task handles adding the symbols to the symbol table. These | |
105 | // tasks must be run in the same order as the arguments appear on the | |
106 | // command line. | |
107 | ||
108 | class Add_symbols : public Task | |
109 | { | |
110 | public: | |
111 | // THIS_BLOCKER is used to prevent this task from running before the | |
112 | // one for the previous input file. NEXT_BLOCKER is used to prevent | |
113 | // the next task from running. | |
7e1edb90 ILT |
114 | Add_symbols(Input_objects* input_objects, Symbol_table* symtab, |
115 | Layout* layout, Object* object, | |
f6ce93d6 ILT |
116 | Read_symbols_data* sd, Task_token* this_blocker, |
117 | Task_token* next_blocker) | |
7e1edb90 ILT |
118 | : input_objects_(input_objects), symtab_(symtab), layout_(layout), |
119 | object_(object), sd_(sd), this_blocker_(this_blocker), | |
ead1e424 | 120 | next_blocker_(next_blocker) |
bae7f79e ILT |
121 | { } |
122 | ||
123 | ~Add_symbols(); | |
124 | ||
125 | // The standard Task methods. | |
126 | ||
17a1d0a9 ILT |
127 | Task_token* |
128 | is_runnable(); | |
bae7f79e | 129 | |
17a1d0a9 ILT |
130 | void |
131 | locks(Task_locker*); | |
bae7f79e ILT |
132 | |
133 | void | |
134 | run(Workqueue*); | |
135 | ||
c7912668 ILT |
136 | std::string |
137 | get_name() const | |
138 | { return "Add_symbols " + this->object_->name(); } | |
139 | ||
bae7f79e | 140 | private: |
ead1e424 | 141 | Input_objects* input_objects_; |
14bfc3f5 | 142 | Symbol_table* symtab_; |
12e14209 | 143 | Layout* layout_; |
bae7f79e | 144 | Object* object_; |
12e14209 | 145 | Read_symbols_data* sd_; |
bae7f79e ILT |
146 | Task_token* this_blocker_; |
147 | Task_token* next_blocker_; | |
148 | }; | |
149 | ||
ead1e424 ILT |
150 | // This class is used to track the archives in a group. |
151 | ||
152 | class Input_group | |
153 | { | |
154 | public: | |
155 | typedef std::vector<Archive*> Archives; | |
156 | typedef Archives::const_iterator const_iterator; | |
157 | ||
158 | Input_group() | |
159 | : archives_() | |
160 | { } | |
161 | ||
162 | // Add an archive to the group. | |
163 | void | |
164 | add_archive(Archive* arch) | |
165 | { this->archives_.push_back(arch); } | |
166 | ||
167 | // Loop over the archives in the group. | |
168 | ||
169 | const_iterator | |
170 | begin() const | |
171 | { return this->archives_.begin(); } | |
172 | ||
173 | const_iterator | |
174 | end() const | |
175 | { return this->archives_.end(); } | |
176 | ||
177 | private: | |
178 | Archives archives_; | |
179 | }; | |
180 | ||
181 | // This class is used to finish up handling a group. It is just a | |
182 | // closure. | |
183 | ||
184 | class Finish_group : public Task | |
185 | { | |
186 | public: | |
7e1edb90 | 187 | Finish_group(Input_objects* input_objects, Symbol_table* symtab, |
7d9e3d98 | 188 | Layout* layout, Mapfile* mapfile, Input_group* input_group, |
ead1e424 ILT |
189 | int saw_undefined, Task_token* this_blocker, |
190 | Task_token* next_blocker) | |
7e1edb90 | 191 | : input_objects_(input_objects), symtab_(symtab), |
7d9e3d98 | 192 | layout_(layout), mapfile_(mapfile), input_group_(input_group), |
f6ce93d6 ILT |
193 | saw_undefined_(saw_undefined), this_blocker_(this_blocker), |
194 | next_blocker_(next_blocker) | |
ead1e424 ILT |
195 | { } |
196 | ||
197 | ~Finish_group(); | |
198 | ||
199 | // The standard Task methods. | |
200 | ||
17a1d0a9 ILT |
201 | Task_token* |
202 | is_runnable(); | |
ead1e424 | 203 | |
17a1d0a9 ILT |
204 | void |
205 | locks(Task_locker*); | |
ead1e424 ILT |
206 | |
207 | void | |
208 | run(Workqueue*); | |
209 | ||
c7912668 ILT |
210 | std::string |
211 | get_name() const | |
212 | { return "Finish_group"; } | |
213 | ||
ead1e424 ILT |
214 | private: |
215 | Input_objects* input_objects_; | |
216 | Symbol_table* symtab_; | |
217 | Layout* layout_; | |
7d9e3d98 | 218 | Mapfile* mapfile_; |
ead1e424 ILT |
219 | Input_group* input_group_; |
220 | int saw_undefined_; | |
221 | Task_token* this_blocker_; | |
222 | Task_token* next_blocker_; | |
223 | }; | |
224 | ||
da769d56 ILT |
225 | // This class is used to read a file which was not recognized as an |
226 | // object or archive. It tries to read it as a linker script, using | |
227 | // the tokens to serialize with the calls to Add_symbols. | |
228 | ||
229 | class Read_script : public Task | |
230 | { | |
231 | public: | |
f1ed28fb ILT |
232 | Read_script(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, |
233 | Input_objects* input_objects, Mapfile* mapfile, | |
234 | Input_group* input_group, const Input_argument* input_argument, | |
da769d56 ILT |
235 | Input_file* input_file, Task_token* this_blocker, |
236 | Task_token* next_blocker) | |
f1ed28fb | 237 | : symtab_(symtab), layout_(layout), dirpath_(dirpath), |
7d9e3d98 ILT |
238 | input_objects_(input_objects), mapfile_(mapfile), |
239 | input_group_(input_group), input_argument_(input_argument), | |
240 | input_file_(input_file), this_blocker_(this_blocker), | |
241 | next_blocker_(next_blocker) | |
da769d56 ILT |
242 | { } |
243 | ||
244 | ~Read_script(); | |
245 | ||
246 | // The standard Task methods. | |
247 | ||
248 | Task_token* | |
249 | is_runnable(); | |
250 | ||
251 | void | |
252 | locks(Task_locker*); | |
253 | ||
254 | void | |
255 | run(Workqueue*); | |
256 | ||
257 | std::string | |
258 | get_name() const; | |
259 | ||
260 | private: | |
da769d56 ILT |
261 | Symbol_table* symtab_; |
262 | Layout* layout_; | |
263 | Dirsearch* dirpath_; | |
264 | Input_objects* input_objects_; | |
7d9e3d98 | 265 | Mapfile* mapfile_; |
da769d56 ILT |
266 | Input_group* input_group_; |
267 | const Input_argument* input_argument_; | |
268 | Input_file* input_file_; | |
269 | Task_token* this_blocker_; | |
270 | Task_token* next_blocker_; | |
271 | }; | |
272 | ||
bae7f79e ILT |
273 | } // end namespace gold |
274 | ||
275 | #endif // !defined(GOLD_READSYMS_H) |