1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010 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.
29 #include "libiberty.h"
30 #include "filenames.h"
42 #include "incremental.h"
47 // The header of an entry in the archive. This is all readable text,
48 // padded with spaces where necesary. If the contents of an archive
49 // are all text file, the entire archive is readable.
51 struct Archive::Archive_header
55 // The file modification time.
57 // The user's UID in decimal.
59 // The user's GID in decimal.
61 // The file mode in octal.
63 // The file size in decimal.
65 // The final magic code.
69 // Class Archive static variables.
70 unsigned int Archive::total_archives;
71 unsigned int Archive::total_members;
72 unsigned int Archive::total_members_loaded;
76 const char Archive::armag[sarmag] =
78 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
81 const char Archive::armagt[sarmag] =
83 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
86 const char Archive::arfmag[2] = { '`', '\n' };
88 Archive::Archive(const std::string& name, Input_file* input_file,
89 bool is_thin_archive, Dirsearch* dirpath, Task* task)
90 : name_(name), input_file_(input_file), armap_(), armap_names_(),
91 extended_names_(), armap_checked_(), seen_offsets_(), members_(),
92 is_thin_archive_(is_thin_archive), included_member_(false),
93 nested_archives_(), dirpath_(dirpath), task_(task), num_members_(0),
94 incremental_info_(NULL)
97 parameters->options().check_excluded_libs(input_file->found_name());
100 // Set up the archive: read the symbol map and the extended name
106 // We need to ignore empty archives.
107 if (this->input_file_->file().filesize() == sarmag)
110 // The first member of the archive should be the symbol table.
111 std::string armap_name;
112 section_size_type armap_size =
113 convert_to_section_size_type(this->read_header(sarmag, false,
116 if (armap_name.empty())
118 this->read_armap(sarmag + sizeof(Archive_header), armap_size);
119 off = sarmag + sizeof(Archive_header) + armap_size;
121 else if (!this->input_file_->options().whole_archive())
122 gold_error(_("%s: no archive symbol table (run ranlib)"),
123 this->name().c_str());
125 // See if there is an extended name table. We cache these views
126 // because it is likely that we will want to read the following
127 // header in the add_symbols routine.
131 section_size_type extended_size =
132 convert_to_section_size_type(this->read_header(off, true, &xname, NULL));
135 const unsigned char* p = this->get_view(off + sizeof(Archive_header),
136 extended_size, false, true);
137 const char* px = reinterpret_cast<const char*>(p);
138 this->extended_names_.assign(px, extended_size);
140 bool preread_syms = (parameters->options().threads()
141 && parameters->options().preread_archive_symbols());
142 #ifndef ENABLE_THREADS
143 preread_syms = false;
145 if (parameters->options().has_plugins())
146 preread_syms = false;
149 this->read_all_symbols();
152 // Unlock any nested archives.
155 Archive::unlock_nested_archives()
157 for (Nested_archive_table::iterator p = this->nested_archives_.begin();
158 p != this->nested_archives_.end();
161 p->second->unlock(this->task_);
165 // Read the archive symbol map.
168 Archive::read_armap(off_t start, section_size_type size)
170 // To count the total number of archive members, we'll just count
171 // the number of times the file offset changes. Since most archives
172 // group the symbols in the armap by object, this ought to give us
173 // an accurate count.
174 off_t last_seen_offset = -1;
176 // Read in the entire armap.
177 const unsigned char* p = this->get_view(start, size, true, false);
179 // Numbers in the armap are always big-endian.
180 const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
181 unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
184 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
185 const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
186 section_size_type names_size =
187 reinterpret_cast<const char*>(p) + size - pnames;
188 this->armap_names_.assign(pnames, names_size);
190 this->armap_.resize(nsyms);
192 section_offset_type name_offset = 0;
193 for (unsigned int i = 0; i < nsyms; ++i)
195 this->armap_[i].name_offset = name_offset;
196 this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
197 name_offset += strlen(pnames + name_offset) + 1;
199 if (this->armap_[i].file_offset != last_seen_offset)
201 last_seen_offset = this->armap_[i].file_offset;
202 ++this->num_members_;
206 if (static_cast<section_size_type>(name_offset) > names_size)
207 gold_error(_("%s: bad archive symbol table names"),
208 this->name().c_str());
210 // This array keeps track of which symbols are for archive elements
211 // which we have already included in the link.
212 this->armap_checked_.resize(nsyms);
215 // Read the header of an archive member at OFF. Fail if something
216 // goes wrong. Return the size of the member. Set *PNAME to the name
220 Archive::read_header(off_t off, bool cache, std::string* pname,
223 const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
225 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
226 return this->interpret_header(hdr, off, pname, nested_off);
229 // Interpret the header of HDR, the header of the archive member at
230 // file offset OFF. Fail if something goes wrong. Return the size of
231 // the member. Set *PNAME to the name of the member.
234 Archive::interpret_header(const Archive_header* hdr, off_t off,
235 std::string* pname, off_t* nested_off) const
237 if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
239 gold_error(_("%s: malformed archive header at %zu"),
240 this->name().c_str(), static_cast<size_t>(off));
241 return this->input_file_->file().filesize() - off;
244 const int size_string_size = sizeof hdr->ar_size;
245 char size_string[size_string_size + 1];
246 memcpy(size_string, hdr->ar_size, size_string_size);
247 char* ps = size_string + size_string_size;
248 while (ps[-1] == ' ')
254 off_t member_size = strtol(size_string, &end, 10);
257 || (member_size == LONG_MAX && errno == ERANGE))
259 gold_error(_("%s: malformed archive header size at %zu"),
260 this->name().c_str(), static_cast<size_t>(off));
261 return this->input_file_->file().filesize() - off;
264 if (hdr->ar_name[0] != '/')
266 const char* name_end = strchr(hdr->ar_name, '/');
268 || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
270 gold_error(_("%s: malformed archive header name at %zu"),
271 this->name().c_str(), static_cast<size_t>(off));
272 return this->input_file_->file().filesize() - off;
274 pname->assign(hdr->ar_name, name_end - hdr->ar_name);
275 if (nested_off != NULL)
278 else if (hdr->ar_name[1] == ' ')
280 // This is the symbol table.
284 else if (hdr->ar_name[1] == '/')
286 // This is the extended name table.
287 pname->assign(1, '/');
292 long x = strtol(hdr->ar_name + 1, &end, 10);
295 y = strtol(end + 1, &end, 10);
298 || (x == LONG_MAX && errno == ERANGE)
299 || static_cast<size_t>(x) >= this->extended_names_.size())
301 gold_error(_("%s: bad extended name index at %zu"),
302 this->name().c_str(), static_cast<size_t>(off));
303 return this->input_file_->file().filesize() - off;
306 const char* name = this->extended_names_.data() + x;
307 const char* name_end = strchr(name, '\n');
308 if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
309 || name_end[-1] != '/')
311 gold_error(_("%s: bad extended name entry at header %zu"),
312 this->name().c_str(), static_cast<size_t>(off));
313 return this->input_file_->file().filesize() - off;
315 pname->assign(name, name_end - 1 - name);
316 if (nested_off != NULL)
323 // An archive member iterator.
325 class Archive::const_iterator
328 // The header of an archive member. This is what this iterator
332 // The name of the member.
334 // The file offset of the member.
336 // The file offset of a nested archive member.
338 // The size of the member.
342 const_iterator(Archive* archive, off_t off)
343 : archive_(archive), off_(off)
344 { this->read_next_header(); }
348 { return this->header_; }
352 { return &this->header_; }
357 if (this->off_ == this->archive_->file().filesize())
359 this->off_ += sizeof(Archive_header);
360 if (!this->archive_->is_thin_archive())
361 this->off_ += this->header_.size;
362 if ((this->off_ & 1) != 0)
364 this->read_next_header();
371 const_iterator ret = *this;
377 operator==(const const_iterator p) const
378 { return this->off_ == p->off; }
381 operator!=(const const_iterator p) const
382 { return this->off_ != p->off; }
388 // The underlying archive.
390 // The current offset in the file.
392 // The current archive header.
396 // Read the next archive header.
399 Archive::const_iterator::read_next_header()
401 off_t filesize = this->archive_->file().filesize();
404 if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
406 if (filesize != this->off_)
408 gold_error(_("%s: short archive header at %zu"),
409 this->archive_->filename().c_str(),
410 static_cast<size_t>(this->off_));
411 this->off_ = filesize;
413 this->header_.off = filesize;
417 unsigned char buf[sizeof(Archive_header)];
418 this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
420 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
422 this->archive_->interpret_header(hdr, this->off_, &this->header_.name,
423 &this->header_.nested_off);
424 this->header_.off = this->off_;
426 // Skip special members.
427 if (!this->header_.name.empty() && this->header_.name != "/")
430 this->off_ += sizeof(Archive_header) + this->header_.size;
431 if ((this->off_ & 1) != 0)
438 Archive::const_iterator
441 return Archive::const_iterator(this, sarmag);
446 Archive::const_iterator
449 return Archive::const_iterator(this, this->input_file_->file().filesize());
452 // Get the file and offset for an archive member, which may be an
453 // external member of a thin archive. Set *INPUT_FILE to the
454 // file containing the actual member, *MEMOFF to the offset
455 // within that file (0 if not a nested archive), and *MEMBER_NAME
456 // to the name of the archive member. Return TRUE on success.
459 Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
460 off_t* memsize, std::string* member_name)
464 *memsize = this->read_header(off, false, member_name, &nested_off);
466 *input_file = this->input_file_;
467 *memoff = off + static_cast<off_t>(sizeof(Archive_header));
469 if (!this->is_thin_archive_)
472 // Adjust a relative pathname so that it is relative
473 // to the directory containing the archive.
474 if (!IS_ABSOLUTE_PATH(member_name->c_str()))
476 const char* arch_path = this->filename().c_str();
477 const char* basename = lbasename(arch_path);
478 if (basename > arch_path)
479 member_name->replace(0, 0,
480 this->filename().substr(0, basename - arch_path));
485 // This is a member of a nested archive. Open the containing
486 // archive if we don't already have it open, then do a recursive
487 // call to include the member from that archive.
489 Nested_archive_table::const_iterator p =
490 this->nested_archives_.find(*member_name);
491 if (p != this->nested_archives_.end())
495 Input_file_argument* input_file_arg =
496 new Input_file_argument(member_name->c_str(),
497 Input_file_argument::INPUT_FILE_TYPE_FILE,
498 "", false, parameters->options());
499 *input_file = new Input_file(input_file_arg);
501 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
503 arch = new Archive(*member_name, *input_file, false, this->dirpath_,
506 std::pair<Nested_archive_table::iterator, bool> ins =
507 this->nested_archives_.insert(std::make_pair(*member_name, arch));
508 gold_assert(ins.second);
510 return arch->get_file_and_offset(nested_off, input_file, memoff,
511 memsize, member_name);
514 // This is an external member of a thin archive. Open the
515 // file as a regular relocatable object file.
516 Input_file_argument* input_file_arg =
517 new Input_file_argument(member_name->c_str(),
518 Input_file_argument::INPUT_FILE_TYPE_FILE,
519 "", false, this->input_file_->options());
520 *input_file = new Input_file(input_file_arg);
522 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
526 *memsize = (*input_file)->file().filesize();
530 // Return an ELF object for the member at offset OFF. If the ELF
531 // object has an unsupported target type, set *PUNCONFIGURED to true
535 Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
537 *punconfigured = false;
539 Input_file* input_file;
542 std::string member_name;
543 if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
547 if (parameters->options().has_plugins())
549 Object* obj = parameters->options().plugins()->claim_file(input_file,
554 // The input file was claimed by a plugin, and its symbols
555 // have been provided by the plugin.
560 const unsigned char* ehdr;
562 if (!is_elf_object(input_file, memoff, &ehdr, &read_size))
564 gold_error(_("%s: member at %zu is not an ELF object"),
565 this->name().c_str(), static_cast<size_t>(off));
569 Object* obj = make_elf_object((std::string(this->input_file_->filename())
570 + "(" + member_name + ")"),
571 input_file, memoff, ehdr, read_size,
575 obj->set_no_export(this->no_export());
579 // Read the symbols from all the archive members in the link.
582 Archive::read_all_symbols()
584 for (Archive::const_iterator p = this->begin();
587 this->read_symbols(p->off);
590 // Read the symbols from an archive member in the link. OFF is the file
591 // offset of the member header.
594 Archive::read_symbols(off_t off)
597 Object* obj = this->get_elf_object_for_member(off, &dummy);
602 Read_symbols_data* sd = new Read_symbols_data;
603 obj->read_symbols(sd);
604 Archive_member member(obj, sd);
605 this->members_[off] = member;
608 Archive::Should_include
609 Archive::should_include_member(Symbol_table* symtab, Layout* layout,
610 const char* sym_name, Symbol** symp,
611 std::string* why, char** tmpbufp,
614 // In an object file, and therefore in an archive map, an
615 // '@' in the name separates the symbol name from the
616 // version name. If there are two '@' characters, this is
617 // the default version.
618 char* tmpbuf = *tmpbufp;
619 const char* ver = strchr(sym_name, '@');
623 size_t symlen = ver - sym_name;
624 if (symlen + 1 > *tmpbuflen)
626 tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1));
628 *tmpbuflen = symlen + 1;
630 memcpy(tmpbuf, sym_name, symlen);
631 tmpbuf[symlen] = '\0';
642 Symbol* sym = symtab->lookup(sym_name, ver);
646 || !sym->is_undefined()
647 || sym->binding() == elfcpp::STB_WEAK))
648 sym = symtab->lookup(sym_name, NULL);
654 // Check whether the symbol was named in a -u option.
655 if (parameters->options().is_undefined(sym_name))
660 else if (layout->script_options()->is_referenced(sym_name))
662 size_t alc = 100 + strlen(sym_name);
663 char* buf = new char[alc];
664 snprintf(buf, alc, _("script or expression reference to %s"),
670 return Archive::SHOULD_INCLUDE_UNKNOWN;
672 else if (!sym->is_undefined())
673 return Archive::SHOULD_INCLUDE_NO;
674 // PR 12001: Do not include an archive when the undefined
675 // symbol has actually been defined on the command line.
676 else if (layout->script_options()->is_pending_assignment(sym_name))
677 return Archive::SHOULD_INCLUDE_NO;
678 else if (sym->binding() == elfcpp::STB_WEAK)
679 return Archive::SHOULD_INCLUDE_UNKNOWN;
681 return Archive::SHOULD_INCLUDE_YES;
684 // Select members from the archive and add them to the link. We walk
685 // through the elements in the archive map, and look each one up in
686 // the symbol table. If it exists as a strong undefined symbol, we
687 // pull in the corresponding element. We have to do this in a loop,
688 // since pulling in one element may create new undefined symbols which
689 // may be satisfied by other objects in the archive. Return true in
690 // the normal case, false if the first member we tried to add from
691 // this archive had an incompatible target.
694 Archive::add_symbols(Symbol_table* symtab, Layout* layout,
695 Input_objects* input_objects, Mapfile* mapfile)
697 ++Archive::total_archives;
699 if (this->input_file_->options().whole_archive())
700 return this->include_all_members(symtab, layout, input_objects,
703 Archive::total_members += this->num_members_;
705 input_objects->archive_start(this);
707 const size_t armap_size = this->armap_.size();
709 // This is a quick optimization, since we usually see many symbols
710 // in a row with the same offset. last_seen_offset holds the last
711 // offset we saw that was present in the seen_offsets_ set.
712 off_t last_seen_offset = -1;
714 // Track which symbols in the symbol table we've already found to be
718 size_t tmpbuflen = 0;
719 bool added_new_object;
722 added_new_object = false;
723 for (size_t i = 0; i < armap_size; ++i)
725 if (this->armap_checked_[i])
727 if (this->armap_[i].file_offset == last_seen_offset)
729 this->armap_checked_[i] = true;
732 if (this->seen_offsets_.find(this->armap_[i].file_offset)
733 != this->seen_offsets_.end())
735 this->armap_checked_[i] = true;
736 last_seen_offset = this->armap_[i].file_offset;
740 const char* sym_name = (this->armap_names_.data()
741 + this->armap_[i].name_offset);
745 Archive::Should_include t =
746 Archive::should_include_member(symtab, layout, sym_name, &sym,
747 &why, &tmpbuf, &tmpbuflen);
749 if (t == Archive::SHOULD_INCLUDE_NO
750 || t == Archive::SHOULD_INCLUDE_YES)
751 this->armap_checked_[i] = true;
753 if (t != Archive::SHOULD_INCLUDE_YES)
756 // We want to include this object in the link.
757 last_seen_offset = this->armap_[i].file_offset;
758 this->seen_offsets_.insert(last_seen_offset);
760 if (!this->include_member(symtab, layout, input_objects,
761 last_seen_offset, mapfile, sym,
769 added_new_object = true;
772 while (added_new_object);
777 input_objects->archive_stop(this);
782 // Include all the archive members in the link. This is for --whole-archive.
785 Archive::include_all_members(Symbol_table* symtab, Layout* layout,
786 Input_objects* input_objects, Mapfile* mapfile)
788 input_objects->archive_start(this);
790 if (this->members_.size() > 0)
792 std::map<off_t, Archive_member>::const_iterator p;
793 for (p = this->members_.begin();
794 p != this->members_.end();
797 if (!this->include_member(symtab, layout, input_objects, p->first,
798 mapfile, NULL, "--whole-archive"))
800 ++Archive::total_members;
805 for (Archive::const_iterator p = this->begin();
809 if (!this->include_member(symtab, layout, input_objects, p->off,
810 mapfile, NULL, "--whole-archive"))
812 ++Archive::total_members;
816 input_objects->archive_stop(this);
821 // Return the number of members in the archive. This is only used for
825 Archive::count_members()
828 for (Archive::const_iterator p = this->begin();
835 // Include an archive member in the link. OFF is the file offset of
836 // the member header. WHY is the reason we are including this member.
837 // Return true if we added the member or if we had an error, return
838 // false if this was the first member we tried to add from this
839 // archive and it had an incompatible format.
842 Archive::include_member(Symbol_table* symtab, Layout* layout,
843 Input_objects* input_objects, off_t off,
844 Mapfile* mapfile, Symbol* sym, const char* why)
846 ++Archive::total_members_loaded;
848 std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
849 if (p != this->members_.end())
851 Object* obj = p->second.obj_;
853 Read_symbols_data* sd = p->second.sd_;
855 mapfile->report_include_archive_member(obj->name(), sym, why);
856 if (input_objects->add_object(obj))
858 obj->layout(symtab, layout, sd);
859 obj->add_symbols(symtab, sd, layout);
860 this->included_member_ = true;
867 Object* obj = this->get_elf_object_for_member(off, &unconfigured);
869 if (!this->included_member_
870 && this->searched_for()
879 mapfile->report_include_archive_member(obj->name(), sym, why);
881 Pluginobj* pluginobj = obj->pluginobj();
882 if (pluginobj != NULL)
884 pluginobj->add_symbols(symtab, NULL, layout);
885 this->included_member_ = true;
889 if (!input_objects->add_object(obj))
891 // If this is an external member of a thin archive, unlock the
893 if (obj->offset() == 0)
894 obj->unlock(this->task_);
900 if (layout->incremental_inputs() != NULL)
901 layout->incremental_inputs()->report_object(obj, this);
902 Read_symbols_data sd;
903 obj->read_symbols(&sd);
904 obj->layout(symtab, layout, &sd);
905 obj->add_symbols(symtab, &sd, layout);
908 // If this is an external member of a thin archive, unlock the file
909 // for the next task.
910 if (obj->offset() == 0)
911 obj->unlock(this->task_);
913 this->included_member_ = true;
919 // Print statistical information to stderr. This is used for --stats.
922 Archive::print_stats()
924 fprintf(stderr, _("%s: archive libraries: %u\n"),
925 program_name, Archive::total_archives);
926 fprintf(stderr, _("%s: total archive members: %u\n"),
927 program_name, Archive::total_members);
928 fprintf(stderr, _("%s: loaded archive members: %u\n"),
929 program_name, Archive::total_members_loaded);
932 // Add_archive_symbols methods.
934 Add_archive_symbols::~Add_archive_symbols()
936 if (this->this_blocker_ != NULL)
937 delete this->this_blocker_;
938 // next_blocker_ is deleted by the task associated with the next
942 // Return whether we can add the archive symbols. We are blocked by
943 // this_blocker_. We block next_blocker_. We also lock the file.
946 Add_archive_symbols::is_runnable()
948 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
949 return this->this_blocker_;
954 Add_archive_symbols::locks(Task_locker* tl)
956 tl->add(this, this->next_blocker_);
957 tl->add(this, this->archive_->token());
961 Add_archive_symbols::run(Workqueue* workqueue)
963 // For an incremental link, begin recording layout information.
964 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
965 if (incremental_inputs != NULL)
966 incremental_inputs->report_archive_begin(this->archive_);
968 bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
969 this->input_objects_,
971 this->archive_->unlock_nested_archives();
973 this->archive_->release();
974 this->archive_->clear_uncached_views();
978 // This archive holds object files which are incompatible with
980 Read_symbols::incompatible_warning(this->input_argument_,
981 this->archive_->input_file());
982 Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
983 this->layout_, this->dirpath_, this->dirindex_,
984 this->mapfile_, this->input_argument_,
985 this->input_group_, this->next_blocker_);
986 delete this->archive_;
990 if (this->input_group_ != NULL)
991 this->input_group_->add_archive(this->archive_);
994 // For an incremental link, finish recording the layout information.
995 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
996 if (incremental_inputs != NULL)
997 incremental_inputs->report_archive_end(this->archive_);
999 // We no longer need to know about this archive.
1000 delete this->archive_;
1001 this->archive_ = NULL;
1005 // Class Lib_group static variables.
1006 unsigned int Lib_group::total_lib_groups;
1007 unsigned int Lib_group::total_members;
1008 unsigned int Lib_group::total_members_loaded;
1010 Lib_group::Lib_group(const Input_file_lib* lib, Task* task)
1011 : lib_(lib), task_(task), members_()
1013 this->members_.resize(lib->size());
1016 // Select members from the lib group and add them to the link. We walk
1017 // through the the members, and check if each one up should be included.
1018 // If the object says it should be included, we do so. We have to do
1019 // this in a loop, since including one member may create new undefined
1020 // symbols which may be satisfied by other members.
1023 Lib_group::add_symbols(Symbol_table* symtab, Layout* layout,
1024 Input_objects* input_objects)
1026 ++Lib_group::total_lib_groups;
1028 Lib_group::total_members += this->members_.size();
1030 bool added_new_object;
1033 added_new_object = false;
1035 while (i < this->members_.size())
1037 const Archive_member& member = this->members_[i];
1038 Object* obj = member.obj_;
1041 // Skip files with no symbols. Plugin objects have
1042 // member.sd_ == NULL.
1044 && (member.sd_ == NULL || member.sd_->symbol_names != NULL))
1046 Archive::Should_include t = obj->should_include_member(symtab,
1051 if (t != Archive::SHOULD_INCLUDE_YES)
1057 this->include_member(symtab, layout, input_objects, member);
1059 added_new_object = true;
1063 if (member.sd_ != NULL)
1065 // The file must be locked in order to destroy the views
1066 // associated with it.
1067 gold_assert(obj != NULL);
1068 obj->lock(this->task_);
1070 obj->unlock(this->task_);
1074 this->members_[i] = this->members_.back();
1075 this->members_.pop_back();
1078 while (added_new_object);
1081 // Include a lib group member in the link.
1084 Lib_group::include_member(Symbol_table* symtab, Layout* layout,
1085 Input_objects* input_objects,
1086 const Archive_member& member)
1088 ++Lib_group::total_members_loaded;
1090 Object* obj = member.obj_;
1091 gold_assert(obj != NULL);
1093 Pluginobj* pluginobj = obj->pluginobj();
1094 if (pluginobj != NULL)
1096 pluginobj->add_symbols(symtab, NULL, layout);
1100 Read_symbols_data* sd = member.sd_;
1101 gold_assert(sd != NULL);
1102 obj->lock(this->task_);
1103 if (input_objects->add_object(obj))
1105 // FIXME: Record incremental link info for --start-lib/--end-lib.
1106 if (layout->incremental_inputs() != NULL)
1107 layout->incremental_inputs()->report_object(obj, NULL);
1108 obj->layout(symtab, layout, sd);
1109 obj->add_symbols(symtab, sd, layout);
1112 // Unlock the file for the next task.
1113 obj->unlock(this->task_);
1116 // Print statistical information to stderr. This is used for --stats.
1119 Lib_group::print_stats()
1121 fprintf(stderr, _("%s: lib groups: %u\n"),
1122 program_name, Lib_group::total_lib_groups);
1123 fprintf(stderr, _("%s: total lib groups members: %u\n"),
1124 program_name, Lib_group::total_members);
1125 fprintf(stderr, _("%s: loaded lib groups members: %u\n"),
1126 program_name, Lib_group::total_members_loaded);
1130 Add_lib_group_symbols::is_runnable()
1132 if (this->readsyms_blocker_ != NULL && this->readsyms_blocker_->is_blocked())
1133 return this->readsyms_blocker_;
1134 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1135 return this->this_blocker_;
1140 Add_lib_group_symbols::locks(Task_locker* tl)
1142 tl->add(this, this->next_blocker_);
1146 Add_lib_group_symbols::run(Workqueue*)
1148 this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_);
1150 // FIXME: Record incremental link info for --start_lib/--end_lib.
1153 Add_lib_group_symbols::~Add_lib_group_symbols()
1155 if (this->this_blocker_ != NULL)
1156 delete this->this_blocker_;
1157 // next_blocker_ is deleted by the task associated with the next
1161 } // End namespace gold.