Commit | Line | Data |
---|---|---|
61ba1cf9 ILT |
1 | // archive.cc -- archive support for gold |
2 | ||
0f3b89d8 | 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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 | ||
61ba1cf9 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include <cerrno> | |
26 | #include <cstring> | |
27 | #include <climits> | |
28 | #include <vector> | |
a1207466 CC |
29 | #include "libiberty.h" |
30 | #include "filenames.h" | |
61ba1cf9 ILT |
31 | |
32 | #include "elfcpp.h" | |
7e1edb90 | 33 | #include "options.h" |
7d9e3d98 | 34 | #include "mapfile.h" |
61ba1cf9 | 35 | #include "fileread.h" |
ead1e424 | 36 | #include "readsyms.h" |
61ba1cf9 ILT |
37 | #include "symtab.h" |
38 | #include "object.h" | |
88a4108b | 39 | #include "layout.h" |
61ba1cf9 | 40 | #include "archive.h" |
89fc3421 | 41 | #include "plugin.h" |
09ec0418 | 42 | #include "incremental.h" |
61ba1cf9 ILT |
43 | |
44 | namespace gold | |
45 | { | |
46 | ||
e0c52780 CC |
47 | // Library_base methods. |
48 | ||
49 | // Determine whether a definition of SYM_NAME should cause an archive | |
50 | // library member to be included in the link. Returns SHOULD_INCLUDE_YES | |
51 | // if the symbol is referenced but not defined, SHOULD_INCLUDE_NO if the | |
52 | // symbol is already defined, and SHOULD_INCLUDE_UNKNOWN if the symbol is | |
53 | // neither referenced nor defined. | |
54 | ||
55 | Library_base::Should_include | |
56 | Library_base::should_include_member(Symbol_table* symtab, Layout* layout, | |
57 | const char* sym_name, Symbol** symp, | |
58 | std::string* why, char** tmpbufp, | |
59 | size_t* tmpbuflen) | |
60 | { | |
61 | // In an object file, and therefore in an archive map, an | |
62 | // '@' in the name separates the symbol name from the | |
63 | // version name. If there are two '@' characters, this is | |
64 | // the default version. | |
65 | char* tmpbuf = *tmpbufp; | |
66 | const char* ver = strchr(sym_name, '@'); | |
67 | bool def = false; | |
68 | if (ver != NULL) | |
69 | { | |
70 | size_t symlen = ver - sym_name; | |
71 | if (symlen + 1 > *tmpbuflen) | |
72 | { | |
73 | tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1)); | |
74 | *tmpbufp = tmpbuf; | |
75 | *tmpbuflen = symlen + 1; | |
76 | } | |
77 | memcpy(tmpbuf, sym_name, symlen); | |
78 | tmpbuf[symlen] = '\0'; | |
79 | sym_name = tmpbuf; | |
80 | ||
81 | ++ver; | |
82 | if (*ver == '@') | |
83 | { | |
84 | ++ver; | |
85 | def = true; | |
86 | } | |
87 | } | |
88 | ||
89 | Symbol* sym = symtab->lookup(sym_name, ver); | |
90 | if (def | |
91 | && ver != NULL | |
92 | && (sym == NULL | |
93 | || !sym->is_undefined() | |
94 | || sym->binding() == elfcpp::STB_WEAK)) | |
95 | sym = symtab->lookup(sym_name, NULL); | |
96 | ||
97 | *symp = sym; | |
98 | ||
99 | if (sym == NULL) | |
100 | { | |
101 | // Check whether the symbol was named in a -u option. | |
102 | if (parameters->options().is_undefined(sym_name)) | |
103 | { | |
104 | *why = "-u "; | |
105 | *why += sym_name; | |
106 | } | |
107 | else if (layout->script_options()->is_referenced(sym_name)) | |
108 | { | |
109 | size_t alc = 100 + strlen(sym_name); | |
110 | char* buf = new char[alc]; | |
111 | snprintf(buf, alc, _("script or expression reference to %s"), | |
112 | sym_name); | |
113 | *why = buf; | |
114 | delete[] buf; | |
115 | } | |
116 | else | |
117 | return Library_base::SHOULD_INCLUDE_UNKNOWN; | |
118 | } | |
119 | else if (!sym->is_undefined()) | |
120 | return Library_base::SHOULD_INCLUDE_NO; | |
121 | // PR 12001: Do not include an archive when the undefined | |
122 | // symbol has actually been defined on the command line. | |
123 | else if (layout->script_options()->is_pending_assignment(sym_name)) | |
124 | return Library_base::SHOULD_INCLUDE_NO; | |
125 | else if (sym->binding() == elfcpp::STB_WEAK) | |
126 | return Library_base::SHOULD_INCLUDE_UNKNOWN; | |
127 | ||
128 | return Library_base::SHOULD_INCLUDE_YES; | |
129 | } | |
130 | ||
61ba1cf9 | 131 | // The header of an entry in the archive. This is all readable text, |
9b547ce6 | 132 | // padded with spaces where necessary. If the contents of an archive |
61ba1cf9 ILT |
133 | // are all text file, the entire archive is readable. |
134 | ||
135 | struct Archive::Archive_header | |
136 | { | |
137 | // The entry name. | |
138 | char ar_name[16]; | |
139 | // The file modification time. | |
140 | char ar_date[12]; | |
141 | // The user's UID in decimal. | |
142 | char ar_uid[6]; | |
143 | // The user's GID in decimal. | |
144 | char ar_gid[6]; | |
145 | // The file mode in octal. | |
146 | char ar_mode[8]; | |
147 | // The file size in decimal. | |
148 | char ar_size[10]; | |
149 | // The final magic code. | |
150 | char ar_fmag[2]; | |
151 | }; | |
152 | ||
ac45a351 CC |
153 | // Class Archive static variables. |
154 | unsigned int Archive::total_archives; | |
155 | unsigned int Archive::total_members; | |
156 | unsigned int Archive::total_members_loaded; | |
157 | ||
61ba1cf9 ILT |
158 | // Archive methods. |
159 | ||
160 | const char Archive::armag[sarmag] = | |
161 | { | |
162 | '!', '<', 'a', 'r', 'c', 'h', '>', '\n' | |
163 | }; | |
164 | ||
a1207466 CC |
165 | const char Archive::armagt[sarmag] = |
166 | { | |
167 | '!', '<', 't', 'h', 'i', 'n', '>', '\n' | |
168 | }; | |
169 | ||
61ba1cf9 ILT |
170 | const char Archive::arfmag[2] = { '`', '\n' }; |
171 | ||
2ea97941 ILT |
172 | Archive::Archive(const std::string& name, Input_file* input_file, |
173 | bool is_thin_archive, Dirsearch* dirpath, Task* task) | |
e0c52780 CC |
174 | : Library_base(task), name_(name), input_file_(input_file), armap_(), |
175 | armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(), | |
176 | members_(), is_thin_archive_(is_thin_archive), included_member_(false), | |
177 | nested_archives_(), dirpath_(dirpath), num_members_(0) | |
65514900 CC |
178 | { |
179 | this->no_export_ = | |
2ea97941 | 180 | parameters->options().check_excluded_libs(input_file->found_name()); |
65514900 CC |
181 | } |
182 | ||
61ba1cf9 ILT |
183 | // Set up the archive: read the symbol map and the extended name |
184 | // table. | |
185 | ||
186 | void | |
15f8229b | 187 | Archive::setup() |
61ba1cf9 | 188 | { |
3e95a404 ILT |
189 | // We need to ignore empty archives. |
190 | if (this->input_file_->file().filesize() == sarmag) | |
a1207466 | 191 | return; |
3e95a404 | 192 | |
61ba1cf9 ILT |
193 | // The first member of the archive should be the symbol table. |
194 | std::string armap_name; | |
61ab3e40 ILT |
195 | off_t header_size = this->read_header(sarmag, false, &armap_name, NULL); |
196 | if (header_size == -1) | |
197 | return; | |
198 | ||
199 | section_size_type armap_size = convert_to_section_size_type(header_size); | |
75f2446e | 200 | off_t off = sarmag; |
4973341a ILT |
201 | if (armap_name.empty()) |
202 | { | |
203 | this->read_armap(sarmag + sizeof(Archive_header), armap_size); | |
204 | off = sarmag + sizeof(Archive_header) + armap_size; | |
205 | } | |
45aa233b | 206 | else if (!this->input_file_->options().whole_archive()) |
75f2446e ILT |
207 | gold_error(_("%s: no archive symbol table (run ranlib)"), |
208 | this->name().c_str()); | |
4973341a | 209 | |
cb295612 ILT |
210 | // See if there is an extended name table. We cache these views |
211 | // because it is likely that we will want to read the following | |
212 | // header in the add_symbols routine. | |
4973341a ILT |
213 | if ((off & 1) != 0) |
214 | ++off; | |
215 | std::string xname; | |
61ab3e40 ILT |
216 | header_size = this->read_header(off, true, &xname, NULL); |
217 | if (header_size == -1) | |
218 | return; | |
219 | ||
220 | section_size_type extended_size = convert_to_section_size_type(header_size); | |
4973341a ILT |
221 | if (xname == "/") |
222 | { | |
223 | const unsigned char* p = this->get_view(off + sizeof(Archive_header), | |
39d0cb0e | 224 | extended_size, false, true); |
4973341a ILT |
225 | const char* px = reinterpret_cast<const char*>(p); |
226 | this->extended_names_.assign(px, extended_size); | |
227 | } | |
ac45a351 CC |
228 | bool preread_syms = (parameters->options().threads() |
229 | && parameters->options().preread_archive_symbols()); | |
230 | #ifndef ENABLE_THREADS | |
231 | preread_syms = false; | |
89fc3421 CC |
232 | #else |
233 | if (parameters->options().has_plugins()) | |
234 | preread_syms = false; | |
ac45a351 CC |
235 | #endif |
236 | if (preread_syms) | |
15f8229b | 237 | this->read_all_symbols(); |
a1207466 CC |
238 | } |
239 | ||
240 | // Unlock any nested archives. | |
4973341a | 241 | |
a1207466 CC |
242 | void |
243 | Archive::unlock_nested_archives() | |
244 | { | |
245 | for (Nested_archive_table::iterator p = this->nested_archives_.begin(); | |
246 | p != this->nested_archives_.end(); | |
247 | ++p) | |
248 | { | |
249 | p->second->unlock(this->task_); | |
250 | } | |
4973341a | 251 | } |
61ba1cf9 | 252 | |
4973341a ILT |
253 | // Read the archive symbol map. |
254 | ||
255 | void | |
8383303e | 256 | Archive::read_armap(off_t start, section_size_type size) |
4973341a | 257 | { |
ac45a351 CC |
258 | // To count the total number of archive members, we'll just count |
259 | // the number of times the file offset changes. Since most archives | |
260 | // group the symbols in the armap by object, this ought to give us | |
261 | // an accurate count. | |
262 | off_t last_seen_offset = -1; | |
263 | ||
61ba1cf9 | 264 | // Read in the entire armap. |
39d0cb0e | 265 | const unsigned char* p = this->get_view(start, size, true, false); |
61ba1cf9 ILT |
266 | |
267 | // Numbers in the armap are always big-endian. | |
268 | const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p); | |
f6ce93d6 | 269 | unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword); |
61ba1cf9 ILT |
270 | ++pword; |
271 | ||
272 | // Note that the addition is in units of sizeof(elfcpp::Elf_Word). | |
273 | const char* pnames = reinterpret_cast<const char*>(pword + nsyms); | |
8383303e ILT |
274 | section_size_type names_size = |
275 | reinterpret_cast<const char*>(p) + size - pnames; | |
9eb9fa57 | 276 | this->armap_names_.assign(pnames, names_size); |
61ba1cf9 ILT |
277 | |
278 | this->armap_.resize(nsyms); | |
279 | ||
8383303e | 280 | section_offset_type name_offset = 0; |
61ba1cf9 ILT |
281 | for (unsigned int i = 0; i < nsyms; ++i) |
282 | { | |
9eb9fa57 ILT |
283 | this->armap_[i].name_offset = name_offset; |
284 | this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword); | |
285 | name_offset += strlen(pnames + name_offset) + 1; | |
61ba1cf9 | 286 | ++pword; |
ac45a351 CC |
287 | if (this->armap_[i].file_offset != last_seen_offset) |
288 | { | |
289 | last_seen_offset = this->armap_[i].file_offset; | |
290 | ++this->num_members_; | |
291 | } | |
61ba1cf9 ILT |
292 | } |
293 | ||
8383303e | 294 | if (static_cast<section_size_type>(name_offset) > names_size) |
75f2446e ILT |
295 | gold_error(_("%s: bad archive symbol table names"), |
296 | this->name().c_str()); | |
a93d6d07 ILT |
297 | |
298 | // This array keeps track of which symbols are for archive elements | |
299 | // which we have already included in the link. | |
300 | this->armap_checked_.resize(nsyms); | |
61ba1cf9 ILT |
301 | } |
302 | ||
303 | // Read the header of an archive member at OFF. Fail if something | |
304 | // goes wrong. Return the size of the member. Set *PNAME to the name | |
305 | // of the member. | |
306 | ||
307 | off_t | |
a1207466 CC |
308 | Archive::read_header(off_t off, bool cache, std::string* pname, |
309 | off_t* nested_off) | |
61ba1cf9 | 310 | { |
39d0cb0e ILT |
311 | const unsigned char* p = this->get_view(off, sizeof(Archive_header), true, |
312 | cache); | |
61ba1cf9 | 313 | const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p); |
a1207466 | 314 | return this->interpret_header(hdr, off, pname, nested_off); |
4973341a | 315 | } |
61ba1cf9 | 316 | |
4973341a | 317 | // Interpret the header of HDR, the header of the archive member at |
61ab3e40 ILT |
318 | // file offset OFF. Return the size of the member, or -1 if something |
319 | // has gone wrong. Set *PNAME to the name of the member. | |
4973341a ILT |
320 | |
321 | off_t | |
322 | Archive::interpret_header(const Archive_header* hdr, off_t off, | |
92de84a6 | 323 | std::string* pname, off_t* nested_off) const |
4973341a | 324 | { |
61ba1cf9 ILT |
325 | if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0) |
326 | { | |
75f2446e ILT |
327 | gold_error(_("%s: malformed archive header at %zu"), |
328 | this->name().c_str(), static_cast<size_t>(off)); | |
61ab3e40 | 329 | return -1; |
61ba1cf9 ILT |
330 | } |
331 | ||
332 | const int size_string_size = sizeof hdr->ar_size; | |
333 | char size_string[size_string_size + 1]; | |
334 | memcpy(size_string, hdr->ar_size, size_string_size); | |
335 | char* ps = size_string + size_string_size; | |
336 | while (ps[-1] == ' ') | |
337 | --ps; | |
338 | *ps = '\0'; | |
339 | ||
340 | errno = 0; | |
2ea97941 ILT |
341 | char* end; |
342 | off_t member_size = strtol(size_string, &end, 10); | |
343 | if (*end != '\0' | |
61ba1cf9 ILT |
344 | || member_size < 0 |
345 | || (member_size == LONG_MAX && errno == ERANGE)) | |
346 | { | |
75f2446e ILT |
347 | gold_error(_("%s: malformed archive header size at %zu"), |
348 | this->name().c_str(), static_cast<size_t>(off)); | |
61ab3e40 | 349 | return -1; |
61ba1cf9 ILT |
350 | } |
351 | ||
352 | if (hdr->ar_name[0] != '/') | |
353 | { | |
354 | const char* name_end = strchr(hdr->ar_name, '/'); | |
355 | if (name_end == NULL | |
356 | || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name)) | |
357 | { | |
a0c4fb0a | 358 | gold_error(_("%s: malformed archive header name at %zu"), |
75f2446e | 359 | this->name().c_str(), static_cast<size_t>(off)); |
61ab3e40 | 360 | return -1; |
61ba1cf9 ILT |
361 | } |
362 | pname->assign(hdr->ar_name, name_end - hdr->ar_name); | |
a1207466 CC |
363 | if (nested_off != NULL) |
364 | *nested_off = 0; | |
61ba1cf9 ILT |
365 | } |
366 | else if (hdr->ar_name[1] == ' ') | |
367 | { | |
368 | // This is the symbol table. | |
114dfbe1 ILT |
369 | if (!pname->empty()) |
370 | pname->clear(); | |
61ba1cf9 ILT |
371 | } |
372 | else if (hdr->ar_name[1] == '/') | |
373 | { | |
374 | // This is the extended name table. | |
375 | pname->assign(1, '/'); | |
376 | } | |
377 | else | |
378 | { | |
379 | errno = 0; | |
2ea97941 | 380 | long x = strtol(hdr->ar_name + 1, &end, 10); |
a1207466 | 381 | long y = 0; |
2ea97941 ILT |
382 | if (*end == ':') |
383 | y = strtol(end + 1, &end, 10); | |
384 | if (*end != ' ' | |
61ba1cf9 ILT |
385 | || x < 0 |
386 | || (x == LONG_MAX && errno == ERANGE) | |
387 | || static_cast<size_t>(x) >= this->extended_names_.size()) | |
388 | { | |
75f2446e ILT |
389 | gold_error(_("%s: bad extended name index at %zu"), |
390 | this->name().c_str(), static_cast<size_t>(off)); | |
61ab3e40 | 391 | return -1; |
61ba1cf9 ILT |
392 | } |
393 | ||
2ea97941 ILT |
394 | const char* name = this->extended_names_.data() + x; |
395 | const char* name_end = strchr(name, '\n'); | |
396 | if (static_cast<size_t>(name_end - name) > this->extended_names_.size() | |
a1207466 | 397 | || name_end[-1] != '/') |
61ba1cf9 | 398 | { |
75f2446e ILT |
399 | gold_error(_("%s: bad extended name entry at header %zu"), |
400 | this->name().c_str(), static_cast<size_t>(off)); | |
61ab3e40 | 401 | return -1; |
61ba1cf9 | 402 | } |
2ea97941 | 403 | pname->assign(name, name_end - 1 - name); |
a1207466 CC |
404 | if (nested_off != NULL) |
405 | *nested_off = y; | |
61ba1cf9 ILT |
406 | } |
407 | ||
408 | return member_size; | |
409 | } | |
410 | ||
92de84a6 ILT |
411 | // An archive member iterator. |
412 | ||
413 | class Archive::const_iterator | |
414 | { | |
415 | public: | |
416 | // The header of an archive member. This is what this iterator | |
417 | // points to. | |
418 | struct Header | |
419 | { | |
420 | // The name of the member. | |
421 | std::string name; | |
422 | // The file offset of the member. | |
423 | off_t off; | |
424 | // The file offset of a nested archive member. | |
425 | off_t nested_off; | |
426 | // The size of the member. | |
427 | off_t size; | |
428 | }; | |
429 | ||
2a00e4fb | 430 | const_iterator(Archive* archive, off_t off) |
92de84a6 ILT |
431 | : archive_(archive), off_(off) |
432 | { this->read_next_header(); } | |
433 | ||
434 | const Header& | |
435 | operator*() const | |
436 | { return this->header_; } | |
437 | ||
438 | const Header* | |
439 | operator->() const | |
440 | { return &this->header_; } | |
441 | ||
442 | const_iterator& | |
443 | operator++() | |
444 | { | |
445 | if (this->off_ == this->archive_->file().filesize()) | |
446 | return *this; | |
447 | this->off_ += sizeof(Archive_header); | |
448 | if (!this->archive_->is_thin_archive()) | |
449 | this->off_ += this->header_.size; | |
450 | if ((this->off_ & 1) != 0) | |
451 | ++this->off_; | |
452 | this->read_next_header(); | |
453 | return *this; | |
454 | } | |
455 | ||
456 | const_iterator | |
457 | operator++(int) | |
458 | { | |
459 | const_iterator ret = *this; | |
460 | ++*this; | |
461 | return ret; | |
462 | } | |
463 | ||
464 | bool | |
465 | operator==(const const_iterator p) const | |
466 | { return this->off_ == p->off; } | |
467 | ||
468 | bool | |
469 | operator!=(const const_iterator p) const | |
470 | { return this->off_ != p->off; } | |
471 | ||
472 | private: | |
473 | void | |
474 | read_next_header(); | |
475 | ||
476 | // The underlying archive. | |
2a00e4fb | 477 | Archive* archive_; |
92de84a6 ILT |
478 | // The current offset in the file. |
479 | off_t off_; | |
480 | // The current archive header. | |
481 | Header header_; | |
482 | }; | |
483 | ||
484 | // Read the next archive header. | |
4973341a ILT |
485 | |
486 | void | |
92de84a6 | 487 | Archive::const_iterator::read_next_header() |
4973341a | 488 | { |
92de84a6 | 489 | off_t filesize = this->archive_->file().filesize(); |
4973341a ILT |
490 | while (true) |
491 | { | |
92de84a6 ILT |
492 | if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header))) |
493 | { | |
494 | if (filesize != this->off_) | |
495 | { | |
496 | gold_error(_("%s: short archive header at %zu"), | |
497 | this->archive_->filename().c_str(), | |
498 | static_cast<size_t>(this->off_)); | |
499 | this->off_ = filesize; | |
500 | } | |
501 | this->header_.off = filesize; | |
502 | return; | |
503 | } | |
504 | ||
505 | unsigned char buf[sizeof(Archive_header)]; | |
506 | this->archive_->file().read(this->off_, sizeof(Archive_header), buf); | |
507 | ||
508 | const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf); | |
61ab3e40 ILT |
509 | off_t size = this->archive_->interpret_header(hdr, this->off_, |
510 | &this->header_.name, | |
511 | &this->header_.nested_off); | |
512 | if (size == -1) | |
513 | { | |
514 | this->header_.off = filesize; | |
515 | return; | |
516 | } | |
517 | ||
518 | this->header_.size = size; | |
92de84a6 ILT |
519 | this->header_.off = this->off_; |
520 | ||
521 | // Skip special members. | |
522 | if (!this->header_.name.empty() && this->header_.name != "/") | |
523 | return; | |
524 | ||
525 | this->off_ += sizeof(Archive_header) + this->header_.size; | |
526 | if ((this->off_ & 1) != 0) | |
527 | ++this->off_; | |
4973341a ILT |
528 | } |
529 | } | |
530 | ||
92de84a6 ILT |
531 | // Initial iterator. |
532 | ||
533 | Archive::const_iterator | |
2a00e4fb | 534 | Archive::begin() |
92de84a6 ILT |
535 | { |
536 | return Archive::const_iterator(this, sarmag); | |
537 | } | |
538 | ||
539 | // Final iterator. | |
540 | ||
541 | Archive::const_iterator | |
2a00e4fb | 542 | Archive::end() |
92de84a6 ILT |
543 | { |
544 | return Archive::const_iterator(this, this->input_file_->file().filesize()); | |
545 | } | |
546 | ||
ac45a351 CC |
547 | // Get the file and offset for an archive member, which may be an |
548 | // external member of a thin archive. Set *INPUT_FILE to the | |
549 | // file containing the actual member, *MEMOFF to the offset | |
550 | // within that file (0 if not a nested archive), and *MEMBER_NAME | |
551 | // to the name of the archive member. Return TRUE on success. | |
552 | ||
553 | bool | |
2ea97941 | 554 | Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff, |
89fc3421 | 555 | off_t* memsize, std::string* member_name) |
ac45a351 CC |
556 | { |
557 | off_t nested_off; | |
558 | ||
89fc3421 | 559 | *memsize = this->read_header(off, false, member_name, &nested_off); |
61ab3e40 ILT |
560 | if (*memsize == -1) |
561 | return false; | |
ac45a351 | 562 | |
2ea97941 | 563 | *input_file = this->input_file_; |
ac45a351 CC |
564 | *memoff = off + static_cast<off_t>(sizeof(Archive_header)); |
565 | ||
566 | if (!this->is_thin_archive_) | |
567 | return true; | |
568 | ||
569 | // Adjust a relative pathname so that it is relative | |
570 | // to the directory containing the archive. | |
571 | if (!IS_ABSOLUTE_PATH(member_name->c_str())) | |
572 | { | |
fbd8a257 | 573 | const char* arch_path = this->filename().c_str(); |
ac45a351 CC |
574 | const char* basename = lbasename(arch_path); |
575 | if (basename > arch_path) | |
576 | member_name->replace(0, 0, | |
fbd8a257 | 577 | this->filename().substr(0, basename - arch_path)); |
ac45a351 CC |
578 | } |
579 | ||
580 | if (nested_off > 0) | |
581 | { | |
582 | // This is a member of a nested archive. Open the containing | |
583 | // archive if we don't already have it open, then do a recursive | |
584 | // call to include the member from that archive. | |
585 | Archive* arch; | |
586 | Nested_archive_table::const_iterator p = | |
587 | this->nested_archives_.find(*member_name); | |
588 | if (p != this->nested_archives_.end()) | |
589 | arch = p->second; | |
590 | else | |
591 | { | |
592 | Input_file_argument* input_file_arg = | |
ae3b5189 CD |
593 | new Input_file_argument(member_name->c_str(), |
594 | Input_file_argument::INPUT_FILE_TYPE_FILE, | |
595 | "", false, parameters->options()); | |
2ea97941 | 596 | *input_file = new Input_file(input_file_arg); |
15f8229b | 597 | int dummy = 0; |
2ea97941 | 598 | if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy)) |
ac45a351 | 599 | return false; |
2ea97941 | 600 | arch = new Archive(*member_name, *input_file, false, this->dirpath_, |
ac45a351 | 601 | this->task_); |
15f8229b | 602 | arch->setup(); |
ac45a351 CC |
603 | std::pair<Nested_archive_table::iterator, bool> ins = |
604 | this->nested_archives_.insert(std::make_pair(*member_name, arch)); | |
605 | gold_assert(ins.second); | |
606 | } | |
2ea97941 | 607 | return arch->get_file_and_offset(nested_off, input_file, memoff, |
15f8229b | 608 | memsize, member_name); |
ac45a351 CC |
609 | } |
610 | ||
611 | // This is an external member of a thin archive. Open the | |
612 | // file as a regular relocatable object file. | |
613 | Input_file_argument* input_file_arg = | |
ae3b5189 CD |
614 | new Input_file_argument(member_name->c_str(), |
615 | Input_file_argument::INPUT_FILE_TYPE_FILE, | |
616 | "", false, this->input_file_->options()); | |
2ea97941 | 617 | *input_file = new Input_file(input_file_arg); |
15f8229b | 618 | int dummy = 0; |
2ea97941 | 619 | if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy)) |
ac45a351 CC |
620 | return false; |
621 | ||
622 | *memoff = 0; | |
2ea97941 | 623 | *memsize = (*input_file)->file().filesize(); |
ac45a351 CC |
624 | return true; |
625 | } | |
626 | ||
c20cbc06 ILT |
627 | // Return an ELF object for the member at offset OFF. If |
628 | // PUNCONFIGURED is not NULL, then if the ELF object has an | |
629 | // unsupported target type, set *PUNCONFIGURED to true and return | |
630 | // NULL. | |
ac45a351 CC |
631 | |
632 | Object* | |
15f8229b | 633 | Archive::get_elf_object_for_member(off_t off, bool* punconfigured) |
ac45a351 | 634 | { |
c20cbc06 ILT |
635 | if (punconfigured != NULL) |
636 | *punconfigured = false; | |
15f8229b | 637 | |
2ea97941 | 638 | Input_file* input_file; |
ac45a351 | 639 | off_t memoff; |
89fc3421 | 640 | off_t memsize; |
15f8229b | 641 | std::string member_name; |
2ea97941 | 642 | if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize, |
15f8229b | 643 | &member_name)) |
ac45a351 CC |
644 | return NULL; |
645 | ||
89fc3421 CC |
646 | if (parameters->options().has_plugins()) |
647 | { | |
2ea97941 | 648 | Object* obj = parameters->options().plugins()->claim_file(input_file, |
89fc3421 CC |
649 | memoff, |
650 | memsize); | |
651 | if (obj != NULL) | |
652 | { | |
653 | // The input file was claimed by a plugin, and its symbols | |
654 | // have been provided by the plugin. | |
89fc3421 CC |
655 | return obj; |
656 | } | |
657 | } | |
658 | ||
f6060a4d ILT |
659 | const unsigned char* ehdr; |
660 | int read_size; | |
2ea97941 | 661 | if (!is_elf_object(input_file, memoff, &ehdr, &read_size)) |
ac45a351 CC |
662 | { |
663 | gold_error(_("%s: member at %zu is not an ELF object"), | |
664 | this->name().c_str(), static_cast<size_t>(off)); | |
665 | return NULL; | |
666 | } | |
667 | ||
ca09d69a | 668 | Object* obj = make_elf_object((std::string(this->input_file_->filename()) |
65514900 | 669 | + "(" + member_name + ")"), |
2ea97941 | 670 | input_file, memoff, ehdr, read_size, |
65514900 | 671 | punconfigured); |
029ba973 ILT |
672 | if (obj == NULL) |
673 | return NULL; | |
65514900 CC |
674 | obj->set_no_export(this->no_export()); |
675 | return obj; | |
ac45a351 CC |
676 | } |
677 | ||
678 | // Read the symbols from all the archive members in the link. | |
679 | ||
680 | void | |
15f8229b | 681 | Archive::read_all_symbols() |
ac45a351 CC |
682 | { |
683 | for (Archive::const_iterator p = this->begin(); | |
684 | p != this->end(); | |
685 | ++p) | |
15f8229b | 686 | this->read_symbols(p->off); |
ac45a351 CC |
687 | } |
688 | ||
689 | // Read the symbols from an archive member in the link. OFF is the file | |
690 | // offset of the member header. | |
691 | ||
692 | void | |
15f8229b | 693 | Archive::read_symbols(off_t off) |
ac45a351 | 694 | { |
c20cbc06 | 695 | Object* obj = this->get_elf_object_for_member(off, NULL); |
ac45a351 CC |
696 | if (obj == NULL) |
697 | return; | |
698 | ||
699 | Read_symbols_data* sd = new Read_symbols_data; | |
700 | obj->read_symbols(sd); | |
701 | Archive_member member(obj, sd); | |
702 | this->members_[off] = member; | |
703 | } | |
704 | ||
705 | // Select members from the archive and add them to the link. We walk | |
706 | // through the elements in the archive map, and look each one up in | |
707 | // the symbol table. If it exists as a strong undefined symbol, we | |
708 | // pull in the corresponding element. We have to do this in a loop, | |
709 | // since pulling in one element may create new undefined symbols which | |
15f8229b ILT |
710 | // may be satisfied by other objects in the archive. Return true in |
711 | // the normal case, false if the first member we tried to add from | |
712 | // this archive had an incompatible target. | |
ac45a351 | 713 | |
15f8229b | 714 | bool |
ac45a351 CC |
715 | Archive::add_symbols(Symbol_table* symtab, Layout* layout, |
716 | Input_objects* input_objects, Mapfile* mapfile) | |
717 | { | |
718 | ++Archive::total_archives; | |
719 | ||
720 | if (this->input_file_->options().whole_archive()) | |
721 | return this->include_all_members(symtab, layout, input_objects, | |
722 | mapfile); | |
723 | ||
724 | Archive::total_members += this->num_members_; | |
725 | ||
726 | input_objects->archive_start(this); | |
727 | ||
728 | const size_t armap_size = this->armap_.size(); | |
729 | ||
730 | // This is a quick optimization, since we usually see many symbols | |
731 | // in a row with the same offset. last_seen_offset holds the last | |
732 | // offset we saw that was present in the seen_offsets_ set. | |
733 | off_t last_seen_offset = -1; | |
734 | ||
735 | // Track which symbols in the symbol table we've already found to be | |
736 | // defined. | |
737 | ||
9c5b8369 ILT |
738 | char* tmpbuf = NULL; |
739 | size_t tmpbuflen = 0; | |
ac45a351 CC |
740 | bool added_new_object; |
741 | do | |
742 | { | |
743 | added_new_object = false; | |
744 | for (size_t i = 0; i < armap_size; ++i) | |
745 | { | |
746 | if (this->armap_checked_[i]) | |
747 | continue; | |
748 | if (this->armap_[i].file_offset == last_seen_offset) | |
749 | { | |
750 | this->armap_checked_[i] = true; | |
751 | continue; | |
752 | } | |
753 | if (this->seen_offsets_.find(this->armap_[i].file_offset) | |
754 | != this->seen_offsets_.end()) | |
755 | { | |
756 | this->armap_checked_[i] = true; | |
757 | last_seen_offset = this->armap_[i].file_offset; | |
758 | continue; | |
759 | } | |
760 | ||
761 | const char* sym_name = (this->armap_names_.data() | |
762 | + this->armap_[i].name_offset); | |
9c5b8369 | 763 | |
473b7a13 RÁE |
764 | Symbol* sym; |
765 | std::string why; | |
b0193076 | 766 | Archive::Should_include t = |
88a4108b ILT |
767 | Archive::should_include_member(symtab, layout, sym_name, &sym, |
768 | &why, &tmpbuf, &tmpbuflen); | |
9c5b8369 | 769 | |
b0193076 RÁE |
770 | if (t == Archive::SHOULD_INCLUDE_NO |
771 | || t == Archive::SHOULD_INCLUDE_YES) | |
473b7a13 | 772 | this->armap_checked_[i] = true; |
9c5b8369 | 773 | |
b0193076 | 774 | if (t != Archive::SHOULD_INCLUDE_YES) |
ac45a351 CC |
775 | continue; |
776 | ||
777 | // We want to include this object in the link. | |
778 | last_seen_offset = this->armap_[i].file_offset; | |
779 | this->seen_offsets_.insert(last_seen_offset); | |
ac45a351 | 780 | |
15f8229b ILT |
781 | if (!this->include_member(symtab, layout, input_objects, |
782 | last_seen_offset, mapfile, sym, | |
783 | why.c_str())) | |
9c5b8369 ILT |
784 | { |
785 | if (tmpbuf != NULL) | |
786 | free(tmpbuf); | |
787 | return false; | |
788 | } | |
ac45a351 CC |
789 | |
790 | added_new_object = true; | |
791 | } | |
792 | } | |
793 | while (added_new_object); | |
794 | ||
9c5b8369 ILT |
795 | if (tmpbuf != NULL) |
796 | free(tmpbuf); | |
797 | ||
ac45a351 | 798 | input_objects->archive_stop(this); |
15f8229b ILT |
799 | |
800 | return true; | |
ac45a351 CC |
801 | } |
802 | ||
0f3b89d8 ILT |
803 | // Return whether the archive includes a member which defines the |
804 | // symbol SYM. | |
805 | ||
806 | bool | |
807 | Archive::defines_symbol(Symbol* sym) const | |
808 | { | |
809 | const char* symname = sym->name(); | |
810 | size_t symname_len = strlen(symname); | |
811 | size_t armap_size = this->armap_.size(); | |
812 | for (size_t i = 0; i < armap_size; ++i) | |
813 | { | |
814 | if (this->armap_checked_[i]) | |
815 | continue; | |
816 | const char* archive_symname = (this->armap_names_.data() | |
817 | + this->armap_[i].name_offset); | |
818 | if (strncmp(archive_symname, symname, symname_len) != 0) | |
819 | continue; | |
820 | char c = archive_symname[symname_len]; | |
821 | if (c == '\0' && sym->version() == NULL) | |
822 | return true; | |
823 | if (c == '@') | |
824 | { | |
825 | const char* ver = archive_symname + symname_len + 1; | |
826 | if (*ver == '@') | |
827 | { | |
828 | if (sym->version() == NULL) | |
829 | return true; | |
830 | ++ver; | |
831 | } | |
832 | if (sym->version() != NULL && strcmp(sym->version(), ver) == 0) | |
833 | return true; | |
834 | } | |
835 | } | |
836 | return false; | |
837 | } | |
838 | ||
92de84a6 ILT |
839 | // Include all the archive members in the link. This is for --whole-archive. |
840 | ||
15f8229b | 841 | bool |
92de84a6 ILT |
842 | Archive::include_all_members(Symbol_table* symtab, Layout* layout, |
843 | Input_objects* input_objects, Mapfile* mapfile) | |
844 | { | |
845 | input_objects->archive_start(this); | |
846 | ||
ac45a351 CC |
847 | if (this->members_.size() > 0) |
848 | { | |
849 | std::map<off_t, Archive_member>::const_iterator p; | |
850 | for (p = this->members_.begin(); | |
851 | p != this->members_.end(); | |
852 | ++p) | |
853 | { | |
15f8229b ILT |
854 | if (!this->include_member(symtab, layout, input_objects, p->first, |
855 | mapfile, NULL, "--whole-archive")) | |
856 | return false; | |
ac45a351 CC |
857 | ++Archive::total_members; |
858 | } | |
859 | } | |
860 | else | |
861 | { | |
862 | for (Archive::const_iterator p = this->begin(); | |
863 | p != this->end(); | |
864 | ++p) | |
865 | { | |
15f8229b ILT |
866 | if (!this->include_member(symtab, layout, input_objects, p->off, |
867 | mapfile, NULL, "--whole-archive")) | |
868 | return false; | |
ac45a351 CC |
869 | ++Archive::total_members; |
870 | } | |
871 | } | |
92de84a6 ILT |
872 | |
873 | input_objects->archive_stop(this); | |
15f8229b ILT |
874 | |
875 | return true; | |
92de84a6 ILT |
876 | } |
877 | ||
878 | // Return the number of members in the archive. This is only used for | |
879 | // reports. | |
880 | ||
881 | size_t | |
2a00e4fb | 882 | Archive::count_members() |
92de84a6 ILT |
883 | { |
884 | size_t ret = 0; | |
885 | for (Archive::const_iterator p = this->begin(); | |
886 | p != this->end(); | |
887 | ++p) | |
888 | ++ret; | |
889 | return ret; | |
890 | } | |
891 | ||
61ba1cf9 | 892 | // Include an archive member in the link. OFF is the file offset of |
7d9e3d98 | 893 | // the member header. WHY is the reason we are including this member. |
15f8229b ILT |
894 | // Return true if we added the member or if we had an error, return |
895 | // false if this was the first member we tried to add from this | |
896 | // archive and it had an incompatible format. | |
61ba1cf9 | 897 | |
15f8229b | 898 | bool |
7e1edb90 | 899 | Archive::include_member(Symbol_table* symtab, Layout* layout, |
7d9e3d98 ILT |
900 | Input_objects* input_objects, off_t off, |
901 | Mapfile* mapfile, Symbol* sym, const char* why) | |
61ba1cf9 | 902 | { |
ac45a351 | 903 | ++Archive::total_members_loaded; |
7d9e3d98 | 904 | |
ac45a351 CC |
905 | std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off); |
906 | if (p != this->members_.end()) | |
a1207466 | 907 | { |
ca09d69a | 908 | Object* obj = p->second.obj_; |
15f8229b | 909 | |
ca09d69a | 910 | Read_symbols_data* sd = p->second.sd_; |
ac45a351 CC |
911 | if (mapfile != NULL) |
912 | mapfile->report_include_archive_member(obj->name(), sym, why); | |
913 | if (input_objects->add_object(obj)) | |
a1207466 | 914 | { |
ac45a351 | 915 | obj->layout(symtab, layout, sd); |
f488e4b0 | 916 | obj->add_symbols(symtab, sd, layout); |
15f8229b | 917 | this->included_member_ = true; |
a1207466 | 918 | } |
ac45a351 | 919 | delete sd; |
15f8229b ILT |
920 | return true; |
921 | } | |
922 | ||
c20cbc06 ILT |
923 | // If this is the first object we are including from this archive, |
924 | // and we searched for this archive, most likely because it was | |
925 | // found via a -l option, then if the target is incompatible we want | |
926 | // to move on to the next archive found in the search path. | |
927 | bool unconfigured = false; | |
928 | bool* punconfigured = NULL; | |
929 | if (!this->included_member_ && this->searched_for()) | |
930 | punconfigured = &unconfigured; | |
61ba1cf9 | 931 | |
c20cbc06 | 932 | Object* obj = this->get_elf_object_for_member(off, punconfigured); |
ac45a351 | 933 | if (obj == NULL) |
c20cbc06 ILT |
934 | { |
935 | // Return false to search for another archive, true if we found | |
936 | // an error. | |
937 | return unconfigured ? false : true; | |
938 | } | |
61ba1cf9 | 939 | |
ac45a351 CC |
940 | if (mapfile != NULL) |
941 | mapfile->report_include_archive_member(obj->name(), sym, why); | |
61ba1cf9 | 942 | |
89fc3421 CC |
943 | Pluginobj* pluginobj = obj->pluginobj(); |
944 | if (pluginobj != NULL) | |
945 | { | |
f488e4b0 | 946 | pluginobj->add_symbols(symtab, NULL, layout); |
15f8229b ILT |
947 | this->included_member_ = true; |
948 | return true; | |
89fc3421 CC |
949 | } |
950 | ||
15f8229b | 951 | if (!input_objects->add_object(obj)) |
f2d707b5 ILT |
952 | { |
953 | // If this is an external member of a thin archive, unlock the | |
954 | // file. | |
955 | if (obj->offset() == 0) | |
956 | obj->unlock(this->task_); | |
957 | delete obj; | |
958 | } | |
15f8229b | 959 | else |
019cdb1a | 960 | { |
00698fc5 | 961 | { |
09ec0418 | 962 | if (layout->incremental_inputs() != NULL) |
c7975edd | 963 | layout->incremental_inputs()->report_object(obj, this, NULL); |
00698fc5 CC |
964 | Read_symbols_data sd; |
965 | obj->read_symbols(&sd); | |
966 | obj->layout(symtab, layout, &sd); | |
967 | obj->add_symbols(symtab, &sd, layout); | |
968 | } | |
fbd8a257 CC |
969 | |
970 | // If this is an external member of a thin archive, unlock the file | |
971 | // for the next task. | |
972 | if (obj->offset() == 0) | |
973 | obj->unlock(this->task_); | |
15f8229b ILT |
974 | |
975 | this->included_member_ = true; | |
019cdb1a | 976 | } |
15f8229b ILT |
977 | |
978 | return true; | |
ac45a351 | 979 | } |
61ba1cf9 | 980 | |
e0c52780 CC |
981 | // Iterate over all unused symbols, and call the visitor class V for each. |
982 | ||
983 | void | |
984 | Archive::do_for_all_unused_symbols(Symbol_visitor_base* v) const | |
985 | { | |
986 | for (std::vector<Armap_entry>::const_iterator p = this->armap_.begin(); | |
987 | p != this->armap_.end(); | |
988 | ++p) | |
989 | { | |
990 | if (this->seen_offsets_.find(p->file_offset) | |
991 | == this->seen_offsets_.end()) | |
992 | v->visit(this->armap_names_.data() + p->name_offset); | |
993 | } | |
994 | } | |
995 | ||
ac45a351 CC |
996 | // Print statistical information to stderr. This is used for --stats. |
997 | ||
998 | void | |
999 | Archive::print_stats() | |
1000 | { | |
1001 | fprintf(stderr, _("%s: archive libraries: %u\n"), | |
1002 | program_name, Archive::total_archives); | |
1003 | fprintf(stderr, _("%s: total archive members: %u\n"), | |
1004 | program_name, Archive::total_members); | |
1005 | fprintf(stderr, _("%s: loaded archive members: %u\n"), | |
1006 | program_name, Archive::total_members_loaded); | |
61ba1cf9 ILT |
1007 | } |
1008 | ||
1009 | // Add_archive_symbols methods. | |
1010 | ||
1011 | Add_archive_symbols::~Add_archive_symbols() | |
1012 | { | |
1013 | if (this->this_blocker_ != NULL) | |
1014 | delete this->this_blocker_; | |
1015 | // next_blocker_ is deleted by the task associated with the next | |
1016 | // input file. | |
1017 | } | |
1018 | ||
1019 | // Return whether we can add the archive symbols. We are blocked by | |
1020 | // this_blocker_. We block next_blocker_. We also lock the file. | |
1021 | ||
17a1d0a9 ILT |
1022 | Task_token* |
1023 | Add_archive_symbols::is_runnable() | |
61ba1cf9 ILT |
1024 | { |
1025 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
17a1d0a9 ILT |
1026 | return this->this_blocker_; |
1027 | return NULL; | |
61ba1cf9 ILT |
1028 | } |
1029 | ||
17a1d0a9 ILT |
1030 | void |
1031 | Add_archive_symbols::locks(Task_locker* tl) | |
61ba1cf9 | 1032 | { |
17a1d0a9 ILT |
1033 | tl->add(this, this->next_blocker_); |
1034 | tl->add(this, this->archive_->token()); | |
61ba1cf9 ILT |
1035 | } |
1036 | ||
1037 | void | |
15f8229b | 1038 | Add_archive_symbols::run(Workqueue* workqueue) |
61ba1cf9 | 1039 | { |
09ec0418 CC |
1040 | // For an incremental link, begin recording layout information. |
1041 | Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs(); | |
1042 | if (incremental_inputs != NULL) | |
c7975edd CC |
1043 | incremental_inputs->report_archive_begin(this->archive_, |
1044 | this->input_argument_->script_info()); | |
09ec0418 | 1045 | |
15f8229b ILT |
1046 | bool added = this->archive_->add_symbols(this->symtab_, this->layout_, |
1047 | this->input_objects_, | |
1048 | this->mapfile_); | |
a1207466 CC |
1049 | this->archive_->unlock_nested_archives(); |
1050 | ||
17a1d0a9 | 1051 | this->archive_->release(); |
39d0cb0e | 1052 | this->archive_->clear_uncached_views(); |
17a1d0a9 | 1053 | |
15f8229b ILT |
1054 | if (!added) |
1055 | { | |
1056 | // This archive holds object files which are incompatible with | |
1057 | // our output file. | |
1058 | Read_symbols::incompatible_warning(this->input_argument_, | |
1059 | this->archive_->input_file()); | |
1060 | Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_, | |
1061 | this->layout_, this->dirpath_, this->dirindex_, | |
1062 | this->mapfile_, this->input_argument_, | |
1063 | this->input_group_, this->next_blocker_); | |
1064 | delete this->archive_; | |
1065 | return; | |
1066 | } | |
1067 | ||
ead1e424 ILT |
1068 | if (this->input_group_ != NULL) |
1069 | this->input_group_->add_archive(this->archive_); | |
1070 | else | |
1071 | { | |
09ec0418 | 1072 | // For an incremental link, finish recording the layout information. |
09ec0418 CC |
1073 | if (incremental_inputs != NULL) |
1074 | incremental_inputs->report_archive_end(this->archive_); | |
1075 | ||
0f3b89d8 ILT |
1076 | if (!parameters->options().has_plugins() |
1077 | || this->archive_->input_file()->options().whole_archive()) | |
1078 | { | |
1079 | // We no longer need to know about this archive. | |
1080 | delete this->archive_; | |
1081 | } | |
1082 | else | |
1083 | { | |
1084 | // The plugin interface may want to rescan this archive. | |
1085 | parameters->options().plugins()->save_archive(this->archive_); | |
1086 | } | |
1087 | ||
c7912668 | 1088 | this->archive_ = NULL; |
ead1e424 | 1089 | } |
61ba1cf9 ILT |
1090 | } |
1091 | ||
b0193076 RÁE |
1092 | // Class Lib_group static variables. |
1093 | unsigned int Lib_group::total_lib_groups; | |
1094 | unsigned int Lib_group::total_members; | |
1095 | unsigned int Lib_group::total_members_loaded; | |
1096 | ||
1097 | Lib_group::Lib_group(const Input_file_lib* lib, Task* task) | |
e0c52780 | 1098 | : Library_base(task), lib_(lib), members_() |
b0193076 RÁE |
1099 | { |
1100 | this->members_.resize(lib->size()); | |
1101 | } | |
1102 | ||
e0c52780 CC |
1103 | const std::string& |
1104 | Lib_group::do_filename() const | |
1105 | { | |
1106 | std::string *filename = new std::string("<group>"); | |
1107 | return *filename; | |
1108 | } | |
1109 | ||
b0193076 | 1110 | // Select members from the lib group and add them to the link. We walk |
9b547ce6 | 1111 | // through the members, and check if each one up should be included. |
b0193076 RÁE |
1112 | // If the object says it should be included, we do so. We have to do |
1113 | // this in a loop, since including one member may create new undefined | |
1114 | // symbols which may be satisfied by other members. | |
1115 | ||
1116 | void | |
1117 | Lib_group::add_symbols(Symbol_table* symtab, Layout* layout, | |
1118 | Input_objects* input_objects) | |
1119 | { | |
1120 | ++Lib_group::total_lib_groups; | |
1121 | ||
1122 | Lib_group::total_members += this->members_.size(); | |
1123 | ||
1124 | bool added_new_object; | |
1125 | do | |
1126 | { | |
1127 | added_new_object = false; | |
1128 | unsigned int i = 0; | |
1129 | while (i < this->members_.size()) | |
1130 | { | |
1131 | const Archive_member& member = this->members_[i]; | |
ca09d69a | 1132 | Object* obj = member.obj_; |
b0193076 RÁE |
1133 | std::string why; |
1134 | ||
1135 | // Skip files with no symbols. Plugin objects have | |
1136 | // member.sd_ == NULL. | |
1137 | if (obj != NULL | |
1138 | && (member.sd_ == NULL || member.sd_->symbol_names != NULL)) | |
1139 | { | |
1140 | Archive::Should_include t = obj->should_include_member(symtab, | |
88a4108b | 1141 | layout, |
b0193076 RÁE |
1142 | member.sd_, |
1143 | &why); | |
1144 | ||
1145 | if (t != Archive::SHOULD_INCLUDE_YES) | |
1146 | { | |
1147 | ++i; | |
1148 | continue; | |
1149 | } | |
1150 | ||
1151 | this->include_member(symtab, layout, input_objects, member); | |
1152 | ||
1153 | added_new_object = true; | |
1154 | } | |
1155 | else | |
1156 | { | |
1157 | if (member.sd_ != NULL) | |
9919d93b CC |
1158 | { |
1159 | // The file must be locked in order to destroy the views | |
1160 | // associated with it. | |
1161 | gold_assert(obj != NULL); | |
1162 | obj->lock(this->task_); | |
1163 | delete member.sd_; | |
1164 | obj->unlock(this->task_); | |
1165 | } | |
b0193076 RÁE |
1166 | } |
1167 | ||
1168 | this->members_[i] = this->members_.back(); | |
1169 | this->members_.pop_back(); | |
1170 | } | |
1171 | } | |
1172 | while (added_new_object); | |
1173 | } | |
1174 | ||
1175 | // Include a lib group member in the link. | |
1176 | ||
1177 | void | |
1178 | Lib_group::include_member(Symbol_table* symtab, Layout* layout, | |
1179 | Input_objects* input_objects, | |
1180 | const Archive_member& member) | |
1181 | { | |
1182 | ++Lib_group::total_members_loaded; | |
1183 | ||
1184 | Object* obj = member.obj_; | |
1185 | gold_assert(obj != NULL); | |
1186 | ||
1187 | Pluginobj* pluginobj = obj->pluginobj(); | |
1188 | if (pluginobj != NULL) | |
1189 | { | |
1190 | pluginobj->add_symbols(symtab, NULL, layout); | |
1191 | return; | |
1192 | } | |
1193 | ||
1194 | Read_symbols_data* sd = member.sd_; | |
1195 | gold_assert(sd != NULL); | |
1196 | obj->lock(this->task_); | |
1197 | if (input_objects->add_object(obj)) | |
1198 | { | |
09ec0418 | 1199 | if (layout->incremental_inputs() != NULL) |
c7975edd | 1200 | layout->incremental_inputs()->report_object(obj, this, NULL); |
b0193076 RÁE |
1201 | obj->layout(symtab, layout, sd); |
1202 | obj->add_symbols(symtab, sd, layout); | |
b0193076 RÁE |
1203 | } |
1204 | delete sd; | |
9919d93b CC |
1205 | // Unlock the file for the next task. |
1206 | obj->unlock(this->task_); | |
b0193076 RÁE |
1207 | } |
1208 | ||
e0c52780 CC |
1209 | // Iterate over all unused symbols, and call the visitor class V for each. |
1210 | ||
1211 | void | |
1212 | Lib_group::do_for_all_unused_symbols(Symbol_visitor_base* v) const | |
1213 | { | |
1214 | // Files are removed from the members list when used, so all the | |
1215 | // files remaining on the list are unused. | |
1216 | for (std::vector<Archive_member>::const_iterator p = this->members_.begin(); | |
1217 | p != this->members_.end(); | |
1218 | ++p) | |
1219 | { | |
1220 | Object* obj = p->obj_; | |
1221 | obj->for_all_global_symbols(p->sd_, v); | |
1222 | } | |
1223 | } | |
1224 | ||
b0193076 RÁE |
1225 | // Print statistical information to stderr. This is used for --stats. |
1226 | ||
1227 | void | |
1228 | Lib_group::print_stats() | |
1229 | { | |
1230 | fprintf(stderr, _("%s: lib groups: %u\n"), | |
1231 | program_name, Lib_group::total_lib_groups); | |
1232 | fprintf(stderr, _("%s: total lib groups members: %u\n"), | |
1233 | program_name, Lib_group::total_members); | |
1234 | fprintf(stderr, _("%s: loaded lib groups members: %u\n"), | |
1235 | program_name, Lib_group::total_members_loaded); | |
1236 | } | |
1237 | ||
1238 | Task_token* | |
1239 | Add_lib_group_symbols::is_runnable() | |
1240 | { | |
97b4be1c CC |
1241 | if (this->readsyms_blocker_ != NULL && this->readsyms_blocker_->is_blocked()) |
1242 | return this->readsyms_blocker_; | |
b0193076 RÁE |
1243 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
1244 | return this->this_blocker_; | |
1245 | return NULL; | |
1246 | } | |
1247 | ||
1248 | void | |
1249 | Add_lib_group_symbols::locks(Task_locker* tl) | |
1250 | { | |
1251 | tl->add(this, this->next_blocker_); | |
1252 | } | |
1253 | ||
1254 | void | |
1255 | Add_lib_group_symbols::run(Workqueue*) | |
1256 | { | |
e0c52780 CC |
1257 | // For an incremental link, begin recording layout information. |
1258 | Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs(); | |
1259 | if (incremental_inputs != NULL) | |
c7975edd | 1260 | incremental_inputs->report_archive_begin(this->lib_, NULL); |
e0c52780 | 1261 | |
b0193076 | 1262 | this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_); |
09ec0418 | 1263 | |
e0c52780 CC |
1264 | if (incremental_inputs != NULL) |
1265 | incremental_inputs->report_archive_end(this->lib_); | |
b0193076 RÁE |
1266 | } |
1267 | ||
1268 | Add_lib_group_symbols::~Add_lib_group_symbols() | |
1269 | { | |
1270 | if (this->this_blocker_ != NULL) | |
1271 | delete this->this_blocker_; | |
1272 | // next_blocker_ is deleted by the task associated with the next | |
1273 | // input file. | |
1274 | } | |
1275 | ||
61ba1cf9 | 1276 | } // End namespace gold. |