2009-03-23 H.J. Lu <hongjiu.lu@intel.com>
[binutils.git] / gold / archive.cc
blob1d83d6a2f79e85c364bc2828470552eb59da53a6
1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009 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 #include "gold.h"
25 #include <cerrno>
26 #include <cstring>
27 #include <climits>
28 #include <vector>
29 #include "libiberty.h"
30 #include "filenames.h"
32 #include "elfcpp.h"
33 #include "options.h"
34 #include "mapfile.h"
35 #include "fileread.h"
36 #include "readsyms.h"
37 #include "symtab.h"
38 #include "object.h"
39 #include "archive.h"
40 #include "plugin.h"
42 namespace gold
45 // The header of an entry in the archive. This is all readable text,
46 // padded with spaces where necesary. If the contents of an archive
47 // are all text file, the entire archive is readable.
49 struct Archive::Archive_header
51 // The entry name.
52 char ar_name[16];
53 // The file modification time.
54 char ar_date[12];
55 // The user's UID in decimal.
56 char ar_uid[6];
57 // The user's GID in decimal.
58 char ar_gid[6];
59 // The file mode in octal.
60 char ar_mode[8];
61 // The file size in decimal.
62 char ar_size[10];
63 // The final magic code.
64 char ar_fmag[2];
67 // Class Archive static variables.
68 unsigned int Archive::total_archives;
69 unsigned int Archive::total_members;
70 unsigned int Archive::total_members_loaded;
72 // Archive methods.
74 const char Archive::armag[sarmag] =
76 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
79 const char Archive::armagt[sarmag] =
81 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
84 const char Archive::arfmag[2] = { '`', '\n' };
86 // Set up the archive: read the symbol map and the extended name
87 // table.
89 void
90 Archive::setup()
92 // We need to ignore empty archives.
93 if (this->input_file_->file().filesize() == sarmag)
94 return;
96 // The first member of the archive should be the symbol table.
97 std::string armap_name;
98 section_size_type armap_size =
99 convert_to_section_size_type(this->read_header(sarmag, false,
100 &armap_name, NULL));
101 off_t off = sarmag;
102 if (armap_name.empty())
104 this->read_armap(sarmag + sizeof(Archive_header), armap_size);
105 off = sarmag + sizeof(Archive_header) + armap_size;
107 else if (!this->input_file_->options().whole_archive())
108 gold_error(_("%s: no archive symbol table (run ranlib)"),
109 this->name().c_str());
111 // See if there is an extended name table. We cache these views
112 // because it is likely that we will want to read the following
113 // header in the add_symbols routine.
114 if ((off & 1) != 0)
115 ++off;
116 std::string xname;
117 section_size_type extended_size =
118 convert_to_section_size_type(this->read_header(off, true, &xname, NULL));
119 if (xname == "/")
121 const unsigned char* p = this->get_view(off + sizeof(Archive_header),
122 extended_size, false, true);
123 const char* px = reinterpret_cast<const char*>(p);
124 this->extended_names_.assign(px, extended_size);
126 bool preread_syms = (parameters->options().threads()
127 && parameters->options().preread_archive_symbols());
128 #ifndef ENABLE_THREADS
129 preread_syms = false;
130 #else
131 if (parameters->options().has_plugins())
132 preread_syms = false;
133 #endif
134 if (preread_syms)
135 this->read_all_symbols();
138 // Unlock any nested archives.
140 void
141 Archive::unlock_nested_archives()
143 for (Nested_archive_table::iterator p = this->nested_archives_.begin();
144 p != this->nested_archives_.end();
145 ++p)
147 p->second->unlock(this->task_);
151 // Read the archive symbol map.
153 void
154 Archive::read_armap(off_t start, section_size_type size)
156 // To count the total number of archive members, we'll just count
157 // the number of times the file offset changes. Since most archives
158 // group the symbols in the armap by object, this ought to give us
159 // an accurate count.
160 off_t last_seen_offset = -1;
162 // Read in the entire armap.
163 const unsigned char* p = this->get_view(start, size, true, false);
165 // Numbers in the armap are always big-endian.
166 const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
167 unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
168 ++pword;
170 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
171 const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
172 section_size_type names_size =
173 reinterpret_cast<const char*>(p) + size - pnames;
174 this->armap_names_.assign(pnames, names_size);
176 this->armap_.resize(nsyms);
178 section_offset_type name_offset = 0;
179 for (unsigned int i = 0; i < nsyms; ++i)
181 this->armap_[i].name_offset = name_offset;
182 this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
183 name_offset += strlen(pnames + name_offset) + 1;
184 ++pword;
185 if (this->armap_[i].file_offset != last_seen_offset)
187 last_seen_offset = this->armap_[i].file_offset;
188 ++this->num_members_;
192 if (static_cast<section_size_type>(name_offset) > names_size)
193 gold_error(_("%s: bad archive symbol table names"),
194 this->name().c_str());
196 // This array keeps track of which symbols are for archive elements
197 // which we have already included in the link.
198 this->armap_checked_.resize(nsyms);
201 // Read the header of an archive member at OFF. Fail if something
202 // goes wrong. Return the size of the member. Set *PNAME to the name
203 // of the member.
205 off_t
206 Archive::read_header(off_t off, bool cache, std::string* pname,
207 off_t* nested_off)
209 const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
210 cache);
211 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
212 return this->interpret_header(hdr, off, pname, nested_off);
215 // Interpret the header of HDR, the header of the archive member at
216 // file offset OFF. Fail if something goes wrong. Return the size of
217 // the member. Set *PNAME to the name of the member.
219 off_t
220 Archive::interpret_header(const Archive_header* hdr, off_t off,
221 std::string* pname, off_t* nested_off) const
223 if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
225 gold_error(_("%s: malformed archive header at %zu"),
226 this->name().c_str(), static_cast<size_t>(off));
227 return this->input_file_->file().filesize() - off;
230 const int size_string_size = sizeof hdr->ar_size;
231 char size_string[size_string_size + 1];
232 memcpy(size_string, hdr->ar_size, size_string_size);
233 char* ps = size_string + size_string_size;
234 while (ps[-1] == ' ')
235 --ps;
236 *ps = '\0';
238 errno = 0;
239 char* end;
240 off_t member_size = strtol(size_string, &end, 10);
241 if (*end != '\0'
242 || member_size < 0
243 || (member_size == LONG_MAX && errno == ERANGE))
245 gold_error(_("%s: malformed archive header size at %zu"),
246 this->name().c_str(), static_cast<size_t>(off));
247 return this->input_file_->file().filesize() - off;
250 if (hdr->ar_name[0] != '/')
252 const char* name_end = strchr(hdr->ar_name, '/');
253 if (name_end == NULL
254 || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
256 gold_error(_("%s: malformed archive header name at %zu"),
257 this->name().c_str(), static_cast<size_t>(off));
258 return this->input_file_->file().filesize() - off;
260 pname->assign(hdr->ar_name, name_end - hdr->ar_name);
261 if (nested_off != NULL)
262 *nested_off = 0;
264 else if (hdr->ar_name[1] == ' ')
266 // This is the symbol table.
267 pname->clear();
269 else if (hdr->ar_name[1] == '/')
271 // This is the extended name table.
272 pname->assign(1, '/');
274 else
276 errno = 0;
277 long x = strtol(hdr->ar_name + 1, &end, 10);
278 long y = 0;
279 if (*end == ':')
280 y = strtol(end + 1, &end, 10);
281 if (*end != ' '
282 || x < 0
283 || (x == LONG_MAX && errno == ERANGE)
284 || static_cast<size_t>(x) >= this->extended_names_.size())
286 gold_error(_("%s: bad extended name index at %zu"),
287 this->name().c_str(), static_cast<size_t>(off));
288 return this->input_file_->file().filesize() - off;
291 const char* name = this->extended_names_.data() + x;
292 const char* name_end = strchr(name, '\n');
293 if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
294 || name_end[-1] != '/')
296 gold_error(_("%s: bad extended name entry at header %zu"),
297 this->name().c_str(), static_cast<size_t>(off));
298 return this->input_file_->file().filesize() - off;
300 pname->assign(name, name_end - 1 - name);
301 if (nested_off != NULL)
302 *nested_off = y;
305 return member_size;
308 // An archive member iterator.
310 class Archive::const_iterator
312 public:
313 // The header of an archive member. This is what this iterator
314 // points to.
315 struct Header
317 // The name of the member.
318 std::string name;
319 // The file offset of the member.
320 off_t off;
321 // The file offset of a nested archive member.
322 off_t nested_off;
323 // The size of the member.
324 off_t size;
327 const_iterator(Archive* archive, off_t off)
328 : archive_(archive), off_(off)
329 { this->read_next_header(); }
331 const Header&
332 operator*() const
333 { return this->header_; }
335 const Header*
336 operator->() const
337 { return &this->header_; }
339 const_iterator&
340 operator++()
342 if (this->off_ == this->archive_->file().filesize())
343 return *this;
344 this->off_ += sizeof(Archive_header);
345 if (!this->archive_->is_thin_archive())
346 this->off_ += this->header_.size;
347 if ((this->off_ & 1) != 0)
348 ++this->off_;
349 this->read_next_header();
350 return *this;
353 const_iterator
354 operator++(int)
356 const_iterator ret = *this;
357 ++*this;
358 return ret;
361 bool
362 operator==(const const_iterator p) const
363 { return this->off_ == p->off; }
365 bool
366 operator!=(const const_iterator p) const
367 { return this->off_ != p->off; }
369 private:
370 void
371 read_next_header();
373 // The underlying archive.
374 Archive* archive_;
375 // The current offset in the file.
376 off_t off_;
377 // The current archive header.
378 Header header_;
381 // Read the next archive header.
383 void
384 Archive::const_iterator::read_next_header()
386 off_t filesize = this->archive_->file().filesize();
387 while (true)
389 if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
391 if (filesize != this->off_)
393 gold_error(_("%s: short archive header at %zu"),
394 this->archive_->filename().c_str(),
395 static_cast<size_t>(this->off_));
396 this->off_ = filesize;
398 this->header_.off = filesize;
399 return;
402 unsigned char buf[sizeof(Archive_header)];
403 this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
405 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
406 this->header_.size =
407 this->archive_->interpret_header(hdr, this->off_, &this->header_.name,
408 &this->header_.nested_off);
409 this->header_.off = this->off_;
411 // Skip special members.
412 if (!this->header_.name.empty() && this->header_.name != "/")
413 return;
415 this->off_ += sizeof(Archive_header) + this->header_.size;
416 if ((this->off_ & 1) != 0)
417 ++this->off_;
421 // Initial iterator.
423 Archive::const_iterator
424 Archive::begin()
426 return Archive::const_iterator(this, sarmag);
429 // Final iterator.
431 Archive::const_iterator
432 Archive::end()
434 return Archive::const_iterator(this, this->input_file_->file().filesize());
437 // Get the file and offset for an archive member, which may be an
438 // external member of a thin archive. Set *INPUT_FILE to the
439 // file containing the actual member, *MEMOFF to the offset
440 // within that file (0 if not a nested archive), and *MEMBER_NAME
441 // to the name of the archive member. Return TRUE on success.
443 bool
444 Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
445 off_t* memsize, std::string* member_name)
447 off_t nested_off;
449 *memsize = this->read_header(off, false, member_name, &nested_off);
451 *input_file = this->input_file_;
452 *memoff = off + static_cast<off_t>(sizeof(Archive_header));
454 if (!this->is_thin_archive_)
455 return true;
457 // Adjust a relative pathname so that it is relative
458 // to the directory containing the archive.
459 if (!IS_ABSOLUTE_PATH(member_name->c_str()))
461 const char* arch_path = this->filename().c_str();
462 const char* basename = lbasename(arch_path);
463 if (basename > arch_path)
464 member_name->replace(0, 0,
465 this->filename().substr(0, basename - arch_path));
468 if (nested_off > 0)
470 // This is a member of a nested archive. Open the containing
471 // archive if we don't already have it open, then do a recursive
472 // call to include the member from that archive.
473 Archive* arch;
474 Nested_archive_table::const_iterator p =
475 this->nested_archives_.find(*member_name);
476 if (p != this->nested_archives_.end())
477 arch = p->second;
478 else
480 Input_file_argument* input_file_arg =
481 new Input_file_argument(member_name->c_str(), false, "", false,
482 parameters->options());
483 *input_file = new Input_file(input_file_arg);
484 int dummy = 0;
485 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
486 return false;
487 arch = new Archive(*member_name, *input_file, false, this->dirpath_,
488 this->task_);
489 arch->setup();
490 std::pair<Nested_archive_table::iterator, bool> ins =
491 this->nested_archives_.insert(std::make_pair(*member_name, arch));
492 gold_assert(ins.second);
494 return arch->get_file_and_offset(nested_off, input_file, memoff,
495 memsize, member_name);
498 // This is an external member of a thin archive. Open the
499 // file as a regular relocatable object file.
500 Input_file_argument* input_file_arg =
501 new Input_file_argument(member_name->c_str(), false, "", false,
502 this->input_file_->options());
503 *input_file = new Input_file(input_file_arg);
504 int dummy = 0;
505 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
506 return false;
508 *memoff = 0;
509 *memsize = (*input_file)->file().filesize();
510 return true;
513 // Return an ELF object for the member at offset OFF. If the ELF
514 // object has an unsupported target type, set *PUNCONFIGURED to true
515 // and return NULL.
517 Object*
518 Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
520 *punconfigured = false;
522 Input_file* input_file;
523 off_t memoff;
524 off_t memsize;
525 std::string member_name;
526 if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
527 &member_name))
528 return NULL;
530 if (parameters->options().has_plugins())
532 Object* obj = parameters->options().plugins()->claim_file(input_file,
533 memoff,
534 memsize);
535 if (obj != NULL)
537 // The input file was claimed by a plugin, and its symbols
538 // have been provided by the plugin.
539 return obj;
543 off_t filesize = input_file->file().filesize();
544 int read_size = elfcpp::Elf_sizes<64>::ehdr_size;
545 if (filesize - memoff < read_size)
546 read_size = filesize - memoff;
548 if (read_size < 4)
550 gold_error(_("%s: member at %zu is not an ELF object"),
551 this->name().c_str(), static_cast<size_t>(off));
552 return NULL;
555 const unsigned char* ehdr = input_file->file().get_view(memoff, 0, read_size,
556 true, false);
558 static unsigned char elfmagic[4] =
560 elfcpp::ELFMAG0, elfcpp::ELFMAG1,
561 elfcpp::ELFMAG2, elfcpp::ELFMAG3
563 if (memcmp(ehdr, elfmagic, 4) != 0)
565 gold_error(_("%s: member at %zu is not an ELF object"),
566 this->name().c_str(), static_cast<size_t>(off));
567 return NULL;
570 return make_elf_object((std::string(this->input_file_->filename())
571 + "(" + member_name + ")"),
572 input_file, memoff, ehdr, read_size,
573 punconfigured);
576 // Read the symbols from all the archive members in the link.
578 void
579 Archive::read_all_symbols()
581 for (Archive::const_iterator p = this->begin();
582 p != this->end();
583 ++p)
584 this->read_symbols(p->off);
587 // Read the symbols from an archive member in the link. OFF is the file
588 // offset of the member header.
590 void
591 Archive::read_symbols(off_t off)
593 bool dummy;
594 Object* obj = this->get_elf_object_for_member(off, &dummy);
596 if (obj == NULL)
597 return;
599 Read_symbols_data* sd = new Read_symbols_data;
600 obj->read_symbols(sd);
601 Archive_member member(obj, sd);
602 this->members_[off] = member;
605 // Select members from the archive and add them to the link. We walk
606 // through the elements in the archive map, and look each one up in
607 // the symbol table. If it exists as a strong undefined symbol, we
608 // pull in the corresponding element. We have to do this in a loop,
609 // since pulling in one element may create new undefined symbols which
610 // may be satisfied by other objects in the archive. Return true in
611 // the normal case, false if the first member we tried to add from
612 // this archive had an incompatible target.
614 bool
615 Archive::add_symbols(Symbol_table* symtab, Layout* layout,
616 Input_objects* input_objects, Mapfile* mapfile)
618 ++Archive::total_archives;
620 if (this->input_file_->options().whole_archive())
621 return this->include_all_members(symtab, layout, input_objects,
622 mapfile);
624 Archive::total_members += this->num_members_;
626 input_objects->archive_start(this);
628 const size_t armap_size = this->armap_.size();
630 // This is a quick optimization, since we usually see many symbols
631 // in a row with the same offset. last_seen_offset holds the last
632 // offset we saw that was present in the seen_offsets_ set.
633 off_t last_seen_offset = -1;
635 // Track which symbols in the symbol table we've already found to be
636 // defined.
638 char* tmpbuf = NULL;
639 size_t tmpbuflen = 0;
640 bool added_new_object;
643 added_new_object = false;
644 for (size_t i = 0; i < armap_size; ++i)
646 if (this->armap_checked_[i])
647 continue;
648 if (this->armap_[i].file_offset == last_seen_offset)
650 this->armap_checked_[i] = true;
651 continue;
653 if (this->seen_offsets_.find(this->armap_[i].file_offset)
654 != this->seen_offsets_.end())
656 this->armap_checked_[i] = true;
657 last_seen_offset = this->armap_[i].file_offset;
658 continue;
661 const char* sym_name = (this->armap_names_.data()
662 + this->armap_[i].name_offset);
664 // In an object file, and therefore in an archive map, an
665 // '@' in the name separates the symbol name from the
666 // version name. If there are two '@' characters, this is
667 // the default version.
668 const char* ver = strchr(sym_name, '@');
669 bool def = false;
670 if (ver != NULL)
672 size_t symlen = ver - sym_name;
673 if (symlen + 1 > tmpbuflen)
675 tmpbuf = static_cast<char*>(realloc(tmpbuf, symlen + 1));
676 tmpbuflen = symlen + 1;
678 memcpy(tmpbuf, sym_name, symlen);
679 tmpbuf[symlen] = '\0';
680 sym_name = tmpbuf;
682 ++ver;
683 if (*ver == '@')
685 ++ver;
686 def = true;
690 Symbol* sym = symtab->lookup(sym_name, ver);
691 if (def
692 && (sym == NULL
693 || !sym->is_undefined()
694 || sym->binding() == elfcpp::STB_WEAK))
695 sym = symtab->lookup(sym_name, NULL);
697 if (sym == NULL)
699 // Check whether the symbol was named in a -u option.
700 if (!parameters->options().is_undefined(sym_name))
701 continue;
703 else if (!sym->is_undefined())
705 this->armap_checked_[i] = true;
706 continue;
708 else if (sym->binding() == elfcpp::STB_WEAK)
709 continue;
711 // We want to include this object in the link.
712 last_seen_offset = this->armap_[i].file_offset;
713 this->seen_offsets_.insert(last_seen_offset);
714 this->armap_checked_[i] = true;
716 std::string why;
717 if (sym == NULL)
719 why = "-u ";
720 why += sym_name;
722 if (!this->include_member(symtab, layout, input_objects,
723 last_seen_offset, mapfile, sym,
724 why.c_str()))
726 if (tmpbuf != NULL)
727 free(tmpbuf);
728 return false;
731 added_new_object = true;
734 while (added_new_object);
736 if (tmpbuf != NULL)
737 free(tmpbuf);
739 input_objects->archive_stop(this);
741 return true;
744 // Include all the archive members in the link. This is for --whole-archive.
746 bool
747 Archive::include_all_members(Symbol_table* symtab, Layout* layout,
748 Input_objects* input_objects, Mapfile* mapfile)
750 input_objects->archive_start(this);
752 if (this->members_.size() > 0)
754 std::map<off_t, Archive_member>::const_iterator p;
755 for (p = this->members_.begin();
756 p != this->members_.end();
757 ++p)
759 if (!this->include_member(symtab, layout, input_objects, p->first,
760 mapfile, NULL, "--whole-archive"))
761 return false;
762 ++Archive::total_members;
765 else
767 for (Archive::const_iterator p = this->begin();
768 p != this->end();
769 ++p)
771 if (!this->include_member(symtab, layout, input_objects, p->off,
772 mapfile, NULL, "--whole-archive"))
773 return false;
774 ++Archive::total_members;
778 input_objects->archive_stop(this);
780 return true;
783 // Return the number of members in the archive. This is only used for
784 // reports.
786 size_t
787 Archive::count_members()
789 size_t ret = 0;
790 for (Archive::const_iterator p = this->begin();
791 p != this->end();
792 ++p)
793 ++ret;
794 return ret;
797 // Include an archive member in the link. OFF is the file offset of
798 // the member header. WHY is the reason we are including this member.
799 // Return true if we added the member or if we had an error, return
800 // false if this was the first member we tried to add from this
801 // archive and it had an incompatible format.
803 bool
804 Archive::include_member(Symbol_table* symtab, Layout* layout,
805 Input_objects* input_objects, off_t off,
806 Mapfile* mapfile, Symbol* sym, const char* why)
808 ++Archive::total_members_loaded;
810 std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
811 if (p != this->members_.end())
813 Object *obj = p->second.obj_;
815 if (!this->included_member_
816 && this->searched_for()
817 && !parameters->is_compatible_target(obj->target()))
818 return false;
820 Read_symbols_data *sd = p->second.sd_;
821 if (mapfile != NULL)
822 mapfile->report_include_archive_member(obj->name(), sym, why);
823 if (input_objects->add_object(obj))
825 obj->layout(symtab, layout, sd);
826 obj->add_symbols(symtab, sd, layout);
827 this->included_member_ = true;
829 delete sd;
830 return true;
833 bool unconfigured;
834 Object* obj = this->get_elf_object_for_member(off, &unconfigured);
836 if (!this->included_member_
837 && this->searched_for()
838 && (obj == NULL
839 ? unconfigured
840 : !parameters->is_compatible_target(obj->target())))
842 if (obj != NULL)
843 delete obj;
844 return false;
847 if (obj == NULL)
848 return true;
850 if (mapfile != NULL)
851 mapfile->report_include_archive_member(obj->name(), sym, why);
853 Pluginobj* pluginobj = obj->pluginobj();
854 if (pluginobj != NULL)
856 pluginobj->add_symbols(symtab, NULL, layout);
857 this->included_member_ = true;
858 return true;
861 if (!input_objects->add_object(obj))
862 delete obj;
863 else
865 Read_symbols_data sd;
866 obj->read_symbols(&sd);
867 obj->layout(symtab, layout, &sd);
868 obj->add_symbols(symtab, &sd, layout);
870 // If this is an external member of a thin archive, unlock the file
871 // for the next task.
872 if (obj->offset() == 0)
873 obj->unlock(this->task_);
875 this->included_member_ = true;
878 return true;
881 // Print statistical information to stderr. This is used for --stats.
883 void
884 Archive::print_stats()
886 fprintf(stderr, _("%s: archive libraries: %u\n"),
887 program_name, Archive::total_archives);
888 fprintf(stderr, _("%s: total archive members: %u\n"),
889 program_name, Archive::total_members);
890 fprintf(stderr, _("%s: loaded archive members: %u\n"),
891 program_name, Archive::total_members_loaded);
894 // Add_archive_symbols methods.
896 Add_archive_symbols::~Add_archive_symbols()
898 if (this->this_blocker_ != NULL)
899 delete this->this_blocker_;
900 // next_blocker_ is deleted by the task associated with the next
901 // input file.
904 // Return whether we can add the archive symbols. We are blocked by
905 // this_blocker_. We block next_blocker_. We also lock the file.
907 Task_token*
908 Add_archive_symbols::is_runnable()
910 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
911 return this->this_blocker_;
912 return NULL;
915 void
916 Add_archive_symbols::locks(Task_locker* tl)
918 tl->add(this, this->next_blocker_);
919 tl->add(this, this->archive_->token());
922 void
923 Add_archive_symbols::run(Workqueue* workqueue)
925 bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
926 this->input_objects_,
927 this->mapfile_);
928 this->archive_->unlock_nested_archives();
930 this->archive_->release();
931 this->archive_->clear_uncached_views();
933 if (!added)
935 // This archive holds object files which are incompatible with
936 // our output file.
937 Read_symbols::incompatible_warning(this->input_argument_,
938 this->archive_->input_file());
939 Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
940 this->layout_, this->dirpath_, this->dirindex_,
941 this->mapfile_, this->input_argument_,
942 this->input_group_, this->next_blocker_);
943 delete this->archive_;
944 return;
947 if (this->input_group_ != NULL)
948 this->input_group_->add_archive(this->archive_);
949 else
951 // We no longer need to know about this archive.
952 delete this->archive_;
953 this->archive_ = NULL;
957 } // End namespace gold.