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1 | // archive.h -- archive support for gold -*- C++ -*- |
2 | ||
3 | #ifndef GOLD_ARCHIVE_H | |
4 | #define GOLD_ARCHIVE_H | |
5 | ||
6 | #include <string> | |
7 | #include <vector> | |
8 | ||
9 | #include "workqueue.h" | |
10 | ||
11 | namespace gold | |
12 | { | |
13 | ||
14 | class Input_file; | |
15 | class Input_objects; | |
ead1e424 | 16 | class Input_group; |
12e14209 | 17 | class Layout; |
61ba1cf9 ILT |
18 | class Symbol_table; |
19 | ||
20 | // This class represents an archive--generally a libNAME.a file. | |
21 | // Archives have a symbol table and a list of objects. | |
22 | ||
23 | class Archive | |
24 | { | |
25 | public: | |
26 | Archive(const std::string& name, Input_file* input_file) | |
27 | : name_(name), input_file_(input_file), armap_(), extended_names_() | |
28 | { } | |
29 | ||
30 | // The length of the magic string at the start of an archive. | |
31 | static const int sarmag = 8; | |
32 | ||
33 | // The magic string at the start of an archive. | |
34 | static const char armag[sarmag]; | |
35 | ||
36 | // The string expected at the end of an archive member header. | |
37 | static const char arfmag[2]; | |
38 | ||
39 | // The name of the object. | |
40 | const std::string& | |
41 | name() const | |
42 | { return this->name_; } | |
43 | ||
44 | // Set up the archive: read the symbol map. | |
45 | void | |
46 | setup(); | |
47 | ||
ead1e424 ILT |
48 | // Get a reference to the underlying file. |
49 | File_read& | |
50 | file() | |
51 | { return this->input_file_->file(); } | |
52 | ||
61ba1cf9 ILT |
53 | // Lock the underlying file. |
54 | void | |
55 | lock() | |
56 | { this->input_file_->file().lock(); } | |
57 | ||
58 | // Unlock the underlying file. | |
59 | void | |
60 | unlock() | |
61 | { this->input_file_->file().unlock(); } | |
62 | ||
63 | // Return whether the underlying file is locked. | |
64 | bool | |
65 | is_locked() const | |
66 | { return this->input_file_->file().is_locked(); } | |
67 | ||
68 | // Select members from the archive as needed and add them to the | |
69 | // link. | |
70 | void | |
12e14209 | 71 | add_symbols(Symbol_table*, Layout*, Input_objects*); |
61ba1cf9 ILT |
72 | |
73 | private: | |
74 | Archive(const Archive&); | |
75 | Archive& operator=(const Archive&); | |
76 | ||
77 | struct Archive_header; | |
78 | class Add_archive_symbols_locker; | |
79 | ||
80 | // Get a view into the underlying file. | |
81 | const unsigned char* | |
ead1e424 ILT |
82 | get_view(off_t start, off_t size) |
83 | { return this->input_file_->file().get_view(start, size); } | |
61ba1cf9 ILT |
84 | |
85 | // Read an archive member header at OFF. Return the size of the | |
86 | // member, and set *PNAME to the name. | |
87 | off_t | |
88 | read_header(off_t off, std::string* pname); | |
89 | ||
90 | // Include an archive member in the link. | |
91 | void | |
12e14209 | 92 | include_member(Symbol_table*, Layout*, Input_objects*, off_t off); |
61ba1cf9 ILT |
93 | |
94 | // An entry in the archive map of symbols to object files. | |
95 | struct Armap_entry | |
96 | { | |
97 | // The symbol name. | |
98 | const char* name; | |
99 | // The offset to the file. | |
100 | off_t offset; | |
101 | }; | |
102 | ||
103 | // Name of object as printed to user. | |
104 | std::string name_; | |
105 | // For reading the file. | |
106 | Input_file* input_file_; | |
107 | // The archive map. | |
108 | std::vector<Armap_entry> armap_; | |
109 | // The extended name table. | |
110 | std::string extended_names_; | |
ead1e424 ILT |
111 | // Track which symbols in the archive map are for elements which |
112 | // have already been included in the link. | |
113 | std::vector<bool> seen_; | |
61ba1cf9 ILT |
114 | }; |
115 | ||
116 | // This class is used to read an archive and pick out the desired | |
117 | // elements and add them to the link. | |
118 | ||
119 | class Add_archive_symbols : public Task | |
120 | { | |
121 | public: | |
12e14209 ILT |
122 | Add_archive_symbols(Symbol_table* symtab, Layout* layout, |
123 | Input_objects* input_objects, | |
ead1e424 ILT |
124 | Archive* archive, Input_group* input_group, |
125 | Task_token* this_blocker, | |
61ba1cf9 | 126 | Task_token* next_blocker) |
12e14209 | 127 | : symtab_(symtab), layout_(layout), input_objects_(input_objects), |
ead1e424 ILT |
128 | archive_(archive), input_group_(input_group), |
129 | this_blocker_(this_blocker), next_blocker_(next_blocker) | |
61ba1cf9 ILT |
130 | { } |
131 | ||
132 | ~Add_archive_symbols(); | |
133 | ||
134 | // The standard Task methods. | |
135 | ||
136 | Is_runnable_type | |
137 | is_runnable(Workqueue*); | |
138 | ||
139 | Task_locker* | |
140 | locks(Workqueue*); | |
141 | ||
142 | void | |
143 | run(Workqueue*); | |
144 | ||
145 | private: | |
146 | class Add_archive_symbols_locker; | |
147 | ||
148 | Symbol_table* symtab_; | |
12e14209 | 149 | Layout* layout_; |
61ba1cf9 ILT |
150 | Input_objects* input_objects_; |
151 | Archive* archive_; | |
ead1e424 | 152 | Input_group* input_group_; |
61ba1cf9 ILT |
153 | Task_token* this_blocker_; |
154 | Task_token* next_blocker_; | |
155 | }; | |
156 | ||
157 | } // End namespace gold. | |
158 | ||
159 | #endif // !defined(GOLD_ARCHIVE_H) |