| 1 | // readsyms.h -- read input file symbols for gold -*- C++ -*- |
| 2 | |
| 3 | #ifndef GOLD_READSYMS_H |
| 4 | #define GOLD_READSYMS_H |
| 5 | |
| 6 | #include <vector> |
| 7 | |
| 8 | #include "workqueue.h" |
| 9 | #include "object.h" |
| 10 | |
| 11 | namespace gold |
| 12 | { |
| 13 | |
| 14 | class Input_objects; |
| 15 | class Symbol_table; |
| 16 | class Input_group; |
| 17 | class Archive; |
| 18 | |
| 19 | // This Task is responsible for reading the symbols from an input |
| 20 | // file. This also includes reading the relocations so that we can |
| 21 | // check for any that require a PLT and/or a GOT. After the data has |
| 22 | // been read, this queues up another task to actually add the symbols |
| 23 | // to the symbol table. The tasks are separated because the file |
| 24 | // reading can occur in parallel but adding the symbols must be done |
| 25 | // in the order of the input files. |
| 26 | |
| 27 | class Read_symbols : public Task |
| 28 | { |
| 29 | public: |
| 30 | // DIRPATH is the list of directories to search for libraries. |
| 31 | // INPUT is the file to read. INPUT_GROUP is not NULL if we are in |
| 32 | // the middle of an input group. THIS_BLOCKER is used to prevent |
| 33 | // the associated Add_symbols task from running before the previous |
| 34 | // one has completed; it will be NULL for the first task. |
| 35 | // NEXT_BLOCKER is used to block the next input file from adding |
| 36 | // symbols. |
| 37 | Read_symbols(const General_options& options, Input_objects* input_objects, |
| 38 | Symbol_table* symtab, Layout* layout, const Dirsearch& dirpath, |
| 39 | const Input_argument* input_argument, Input_group* input_group, |
| 40 | Task_token* this_blocker, Task_token* next_blocker) |
| 41 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
| 42 | layout_(layout), dirpath_(dirpath), input_argument_(input_argument), |
| 43 | input_group_(input_group), this_blocker_(this_blocker), |
| 44 | next_blocker_(next_blocker) |
| 45 | { } |
| 46 | |
| 47 | ~Read_symbols(); |
| 48 | |
| 49 | // The standard Task methods. |
| 50 | |
| 51 | Is_runnable_type |
| 52 | is_runnable(Workqueue*); |
| 53 | |
| 54 | Task_locker* |
| 55 | locks(Workqueue*); |
| 56 | |
| 57 | void |
| 58 | run(Workqueue*); |
| 59 | |
| 60 | private: |
| 61 | // Handle an archive group. |
| 62 | void |
| 63 | do_group(Workqueue*); |
| 64 | |
| 65 | const General_options& options_; |
| 66 | Input_objects* input_objects_; |
| 67 | Symbol_table* symtab_; |
| 68 | Layout* layout_; |
| 69 | const Dirsearch& dirpath_; |
| 70 | const Input_argument* input_argument_; |
| 71 | Input_group* input_group_; |
| 72 | Task_token* this_blocker_; |
| 73 | Task_token* next_blocker_; |
| 74 | }; |
| 75 | |
| 76 | // This Task handles adding the symbols to the symbol table. These |
| 77 | // tasks must be run in the same order as the arguments appear on the |
| 78 | // command line. |
| 79 | |
| 80 | class Add_symbols : public Task |
| 81 | { |
| 82 | public: |
| 83 | // THIS_BLOCKER is used to prevent this task from running before the |
| 84 | // one for the previous input file. NEXT_BLOCKER is used to prevent |
| 85 | // the next task from running. |
| 86 | Add_symbols(const General_options& options, Input_objects* input_objects, |
| 87 | Symbol_table* symtab, Layout* layout, Object* object, |
| 88 | Read_symbols_data* sd, Task_token* this_blocker, |
| 89 | Task_token* next_blocker) |
| 90 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
| 91 | layout_(layout), object_(object), sd_(sd), this_blocker_(this_blocker), |
| 92 | next_blocker_(next_blocker) |
| 93 | { } |
| 94 | |
| 95 | ~Add_symbols(); |
| 96 | |
| 97 | // The standard Task methods. |
| 98 | |
| 99 | Is_runnable_type |
| 100 | is_runnable(Workqueue*); |
| 101 | |
| 102 | Task_locker* |
| 103 | locks(Workqueue*); |
| 104 | |
| 105 | void |
| 106 | run(Workqueue*); |
| 107 | |
| 108 | private: |
| 109 | class Add_symbols_locker; |
| 110 | |
| 111 | const General_options& options_; |
| 112 | Input_objects* input_objects_; |
| 113 | Symbol_table* symtab_; |
| 114 | Layout* layout_; |
| 115 | Object* object_; |
| 116 | Read_symbols_data* sd_; |
| 117 | Task_token* this_blocker_; |
| 118 | Task_token* next_blocker_; |
| 119 | }; |
| 120 | |
| 121 | // This class is used to track the archives in a group. |
| 122 | |
| 123 | class Input_group |
| 124 | { |
| 125 | public: |
| 126 | typedef std::vector<Archive*> Archives; |
| 127 | typedef Archives::const_iterator const_iterator; |
| 128 | |
| 129 | Input_group() |
| 130 | : archives_() |
| 131 | { } |
| 132 | |
| 133 | // Add an archive to the group. |
| 134 | void |
| 135 | add_archive(Archive* arch) |
| 136 | { this->archives_.push_back(arch); } |
| 137 | |
| 138 | // Loop over the archives in the group. |
| 139 | |
| 140 | const_iterator |
| 141 | begin() const |
| 142 | { return this->archives_.begin(); } |
| 143 | |
| 144 | const_iterator |
| 145 | end() const |
| 146 | { return this->archives_.end(); } |
| 147 | |
| 148 | private: |
| 149 | Archives archives_; |
| 150 | }; |
| 151 | |
| 152 | // This class is used to finish up handling a group. It is just a |
| 153 | // closure. |
| 154 | |
| 155 | class Finish_group : public Task |
| 156 | { |
| 157 | public: |
| 158 | Finish_group(const General_options& options, Input_objects* input_objects, |
| 159 | Symbol_table* symtab, Layout* layout, Input_group* input_group, |
| 160 | int saw_undefined, Task_token* this_blocker, |
| 161 | Task_token* next_blocker) |
| 162 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
| 163 | layout_(layout), input_group_(input_group), |
| 164 | saw_undefined_(saw_undefined), this_blocker_(this_blocker), |
| 165 | next_blocker_(next_blocker) |
| 166 | { } |
| 167 | |
| 168 | ~Finish_group(); |
| 169 | |
| 170 | // The standard Task methods. |
| 171 | |
| 172 | Is_runnable_type |
| 173 | is_runnable(Workqueue*); |
| 174 | |
| 175 | Task_locker* |
| 176 | locks(Workqueue*); |
| 177 | |
| 178 | void |
| 179 | run(Workqueue*); |
| 180 | |
| 181 | private: |
| 182 | const General_options& options_; |
| 183 | Input_objects* input_objects_; |
| 184 | Symbol_table* symtab_; |
| 185 | Layout* layout_; |
| 186 | Input_group* input_group_; |
| 187 | int saw_undefined_; |
| 188 | Task_token* this_blocker_; |
| 189 | Task_token* next_blocker_; |
| 190 | }; |
| 191 | |
| 192 | } // end namespace gold |
| 193 | |
| 194 | #endif // !defined(GOLD_READSYMS_H) |