1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013
4 // Free Software Foundation, Inc.
5 // Written by Ian Lance Taylor <iant@google.com>.
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "libiberty.h"
31 #include "filenames.h"
43 #include "incremental.h"
48 // Library_base methods.
50 // Determine whether a definition of SYM_NAME should cause an archive
51 // library member to be included in the link. Returns SHOULD_INCLUDE_YES
52 // if the symbol is referenced but not defined, SHOULD_INCLUDE_NO if the
53 // symbol is already defined, and SHOULD_INCLUDE_UNKNOWN if the symbol is
54 // neither referenced nor defined.
56 Library_base::Should_include
57 Library_base::should_include_member(Symbol_table* symtab, Layout* layout,
58 const char* sym_name, Symbol** symp,
59 std::string* why, char** tmpbufp,
62 // In an object file, and therefore in an archive map, an
63 // '@' in the name separates the symbol name from the
64 // version name. If there are two '@' characters, this is
65 // the default version.
66 char* tmpbuf = *tmpbufp;
67 const char* ver = strchr(sym_name, '@');
71 size_t symlen = ver - sym_name;
72 if (symlen + 1 > *tmpbuflen)
74 tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1));
76 *tmpbuflen = symlen + 1;
78 memcpy(tmpbuf, sym_name, symlen);
79 tmpbuf[symlen] = '\0';
90 Symbol* sym = symtab->lookup(sym_name, ver);
94 || !sym->is_undefined()
95 || sym->binding() == elfcpp::STB_WEAK))
96 sym = symtab->lookup(sym_name, NULL);
102 // Check whether the symbol was named in a -u option.
103 if (parameters->options().is_undefined(sym_name))
108 else if (parameters->options().is_export_dynamic_symbol(sym_name))
110 *why = "--export-dynamic-symbol ";
113 else if (layout->script_options()->is_referenced(sym_name))
115 size_t alc = 100 + strlen(sym_name);
116 char* buf = new char[alc];
117 snprintf(buf, alc, _("script or expression reference to %s"),
122 else if (strcmp(sym_name, parameters->entry()) == 0)
124 *why = "entry symbol ";
128 return Library_base::SHOULD_INCLUDE_UNKNOWN;
130 else if (!sym->is_undefined())
131 return Library_base::SHOULD_INCLUDE_NO;
132 // PR 12001: Do not include an archive when the undefined
133 // symbol has actually been defined on the command line.
134 else if (layout->script_options()->is_pending_assignment(sym_name))
135 return Library_base::SHOULD_INCLUDE_NO;
136 else if (sym->binding() == elfcpp::STB_WEAK)
137 return Library_base::SHOULD_INCLUDE_UNKNOWN;
139 return Library_base::SHOULD_INCLUDE_YES;
142 // The header of an entry in the archive. This is all readable text,
143 // padded with spaces where necessary. If the contents of an archive
144 // are all text file, the entire archive is readable.
146 struct Archive::Archive_header
150 // The file modification time.
152 // The user's UID in decimal.
154 // The user's GID in decimal.
156 // The file mode in octal.
158 // The file size in decimal.
160 // The final magic code.
164 // Class Archive static variables.
165 unsigned int Archive::total_archives;
166 unsigned int Archive::total_members;
167 unsigned int Archive::total_members_loaded;
171 const char Archive::armag[sarmag] =
173 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
176 const char Archive::armagt[sarmag] =
178 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
181 const char Archive::arfmag[2] = { '`', '\n' };
183 Archive::Archive(const std::string& name, Input_file* input_file,
184 bool is_thin_archive, Dirsearch* dirpath, Task* task)
185 : Library_base(task), name_(name), input_file_(input_file), armap_(),
186 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
187 members_(), is_thin_archive_(is_thin_archive), included_member_(false),
188 nested_archives_(), dirpath_(dirpath), num_members_(0),
189 included_all_members_(false)
192 parameters->options().check_excluded_libs(input_file->found_name());
195 // Set up the archive: read the symbol map and the extended name
201 // We need to ignore empty archives.
202 if (this->input_file_->file().filesize() == sarmag)
205 // The first member of the archive should be the symbol table.
206 std::string armap_name;
207 off_t header_size = this->read_header(sarmag, false, &armap_name, NULL);
208 if (header_size == -1)
211 section_size_type armap_size = convert_to_section_size_type(header_size);
213 if (armap_name.empty())
215 this->read_armap(sarmag + sizeof(Archive_header), armap_size);
216 off = sarmag + sizeof(Archive_header) + armap_size;
218 else if (!this->input_file_->options().whole_archive())
219 gold_error(_("%s: no archive symbol table (run ranlib)"),
220 this->name().c_str());
222 // See if there is an extended name table. We cache these views
223 // because it is likely that we will want to read the following
224 // header in the add_symbols routine.
228 header_size = this->read_header(off, true, &xname, NULL);
229 if (header_size == -1)
232 section_size_type extended_size = convert_to_section_size_type(header_size);
235 const unsigned char* p = this->get_view(off + sizeof(Archive_header),
236 extended_size, false, true);
237 const char* px = reinterpret_cast<const char*>(p);
238 this->extended_names_.assign(px, extended_size);
240 bool preread_syms = (parameters->options().threads()
241 && parameters->options().preread_archive_symbols());
242 #ifndef ENABLE_THREADS
243 preread_syms = false;
245 if (parameters->options().has_plugins())
246 preread_syms = false;
249 this->read_all_symbols();
252 // Unlock any nested archives.
255 Archive::unlock_nested_archives()
257 for (Nested_archive_table::iterator p = this->nested_archives_.begin();
258 p != this->nested_archives_.end();
261 p->second->unlock(this->task_);
265 // Read the archive symbol map.
268 Archive::read_armap(off_t start, section_size_type size)
270 // To count the total number of archive members, we'll just count
271 // the number of times the file offset changes. Since most archives
272 // group the symbols in the armap by object, this ought to give us
273 // an accurate count.
274 off_t last_seen_offset = -1;
276 // Read in the entire armap.
277 const unsigned char* p = this->get_view(start, size, true, false);
279 // Numbers in the armap are always big-endian.
280 const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
281 unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
284 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
285 const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
286 section_size_type names_size =
287 reinterpret_cast<const char*>(p) + size - pnames;
288 this->armap_names_.assign(pnames, names_size);
290 this->armap_.resize(nsyms);
292 section_offset_type name_offset = 0;
293 for (unsigned int i = 0; i < nsyms; ++i)
295 this->armap_[i].name_offset = name_offset;
296 this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
297 name_offset += strlen(pnames + name_offset) + 1;
299 if (this->armap_[i].file_offset != last_seen_offset)
301 last_seen_offset = this->armap_[i].file_offset;
302 ++this->num_members_;
306 if (static_cast<section_size_type>(name_offset) > names_size)
307 gold_error(_("%s: bad archive symbol table names"),
308 this->name().c_str());
310 // This array keeps track of which symbols are for archive elements
311 // which we have already included in the link.
312 this->armap_checked_.resize(nsyms);
315 // Read the header of an archive member at OFF. Fail if something
316 // goes wrong. Return the size of the member. Set *PNAME to the name
320 Archive::read_header(off_t off, bool cache, std::string* pname,
323 const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
325 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
326 return this->interpret_header(hdr, off, pname, nested_off);
329 // Interpret the header of HDR, the header of the archive member at
330 // file offset OFF. Return the size of the member, or -1 if something
331 // has gone wrong. Set *PNAME to the name of the member.
334 Archive::interpret_header(const Archive_header* hdr, off_t off,
335 std::string* pname, off_t* nested_off) const
337 if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
339 gold_error(_("%s: malformed archive header at %zu"),
340 this->name().c_str(), static_cast<size_t>(off));
344 const int size_string_size = sizeof hdr->ar_size;
345 char size_string[size_string_size + 1];
346 memcpy(size_string, hdr->ar_size, size_string_size);
347 char* ps = size_string + size_string_size;
348 while (ps[-1] == ' ')
354 off_t member_size = strtol(size_string, &end, 10);
357 || (member_size == LONG_MAX && errno == ERANGE))
359 gold_error(_("%s: malformed archive header size at %zu"),
360 this->name().c_str(), static_cast<size_t>(off));
364 if (hdr->ar_name[0] != '/')
366 const char* name_end = strchr(hdr->ar_name, '/');
368 || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
370 gold_error(_("%s: malformed archive header name at %zu"),
371 this->name().c_str(), static_cast<size_t>(off));
374 pname->assign(hdr->ar_name, name_end - hdr->ar_name);
375 if (nested_off != NULL)
378 else if (hdr->ar_name[1] == ' ')
380 // This is the symbol table.
384 else if (hdr->ar_name[1] == '/')
386 // This is the extended name table.
387 pname->assign(1, '/');
392 long x = strtol(hdr->ar_name + 1, &end, 10);
395 y = strtol(end + 1, &end, 10);
398 || (x == LONG_MAX && errno == ERANGE)
399 || static_cast<size_t>(x) >= this->extended_names_.size())
401 gold_error(_("%s: bad extended name index at %zu"),
402 this->name().c_str(), static_cast<size_t>(off));
406 const char* name = this->extended_names_.data() + x;
407 const char* name_end = strchr(name, '\n');
408 if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
409 || name_end[-1] != '/')
411 gold_error(_("%s: bad extended name entry at header %zu"),
412 this->name().c_str(), static_cast<size_t>(off));
415 pname->assign(name, name_end - 1 - name);
416 if (nested_off != NULL)
423 // An archive member iterator.
425 class Archive::const_iterator
428 // The header of an archive member. This is what this iterator
432 // The name of the member.
434 // The file offset of the member.
436 // The file offset of a nested archive member.
438 // The size of the member.
442 const_iterator(Archive* archive, off_t off)
443 : archive_(archive), off_(off)
444 { this->read_next_header(); }
448 { return this->header_; }
452 { return &this->header_; }
457 if (this->off_ == this->archive_->file().filesize())
459 this->off_ += sizeof(Archive_header);
460 if (!this->archive_->is_thin_archive())
461 this->off_ += this->header_.size;
462 if ((this->off_ & 1) != 0)
464 this->read_next_header();
471 const_iterator ret = *this;
477 operator==(const const_iterator p) const
478 { return this->off_ == p->off; }
481 operator!=(const const_iterator p) const
482 { return this->off_ != p->off; }
488 // The underlying archive.
490 // The current offset in the file.
492 // The current archive header.
496 // Read the next archive header.
499 Archive::const_iterator::read_next_header()
501 off_t filesize = this->archive_->file().filesize();
504 if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
506 if (filesize != this->off_)
508 gold_error(_("%s: short archive header at %zu"),
509 this->archive_->filename().c_str(),
510 static_cast<size_t>(this->off_));
511 this->off_ = filesize;
513 this->header_.off = filesize;
517 unsigned char buf[sizeof(Archive_header)];
518 this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
520 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
521 off_t size = this->archive_->interpret_header(hdr, this->off_,
523 &this->header_.nested_off);
526 this->header_.off = filesize;
530 this->header_.size = size;
531 this->header_.off = this->off_;
533 // Skip special members.
534 if (!this->header_.name.empty() && this->header_.name != "/")
537 this->off_ += sizeof(Archive_header) + this->header_.size;
538 if ((this->off_ & 1) != 0)
545 Archive::const_iterator
548 return Archive::const_iterator(this, sarmag);
553 Archive::const_iterator
556 return Archive::const_iterator(this, this->input_file_->file().filesize());
559 // Get the file and offset for an archive member, which may be an
560 // external member of a thin archive. Set *INPUT_FILE to the
561 // file containing the actual member, *MEMOFF to the offset
562 // within that file (0 if not a nested archive), and *MEMBER_NAME
563 // to the name of the archive member. Return TRUE on success.
566 Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
567 off_t* memsize, std::string* member_name)
571 *memsize = this->read_header(off, false, member_name, &nested_off);
575 *input_file = this->input_file_;
576 *memoff = off + static_cast<off_t>(sizeof(Archive_header));
578 if (!this->is_thin_archive_)
581 // Adjust a relative pathname so that it is relative
582 // to the directory containing the archive.
583 if (!IS_ABSOLUTE_PATH(member_name->c_str()))
585 const char* arch_path = this->filename().c_str();
586 const char* basename = lbasename(arch_path);
587 if (basename > arch_path)
588 member_name->replace(0, 0,
589 this->filename().substr(0, basename - arch_path));
594 // This is a member of a nested archive. Open the containing
595 // archive if we don't already have it open, then do a recursive
596 // call to include the member from that archive.
598 Nested_archive_table::const_iterator p =
599 this->nested_archives_.find(*member_name);
600 if (p != this->nested_archives_.end())
604 Input_file_argument* input_file_arg =
605 new Input_file_argument(member_name->c_str(),
606 Input_file_argument::INPUT_FILE_TYPE_FILE,
607 "", false, parameters->options());
608 *input_file = new Input_file(input_file_arg);
610 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
612 arch = new Archive(*member_name, *input_file, false, this->dirpath_,
615 std::pair<Nested_archive_table::iterator, bool> ins =
616 this->nested_archives_.insert(std::make_pair(*member_name, arch));
617 gold_assert(ins.second);
619 return arch->get_file_and_offset(nested_off, input_file, memoff,
620 memsize, member_name);
623 // This is an external member of a thin archive. Open the
624 // file as a regular relocatable object file.
625 Input_file_argument* input_file_arg =
626 new Input_file_argument(member_name->c_str(),
627 Input_file_argument::INPUT_FILE_TYPE_FILE,
628 "", false, this->input_file_->options());
629 *input_file = new Input_file(input_file_arg);
631 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
635 *memsize = (*input_file)->file().filesize();
639 // Return an ELF object for the member at offset OFF. If
640 // PUNCONFIGURED is not NULL, then if the ELF object has an
641 // unsupported target type, set *PUNCONFIGURED to true and return
645 Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
647 if (punconfigured != NULL)
648 *punconfigured = false;
650 Input_file* input_file;
653 std::string member_name;
654 if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
658 const unsigned char* ehdr;
661 bool is_elf_obj = false;
663 if (is_elf_object(input_file, memoff, &ehdr, &read_size))
665 obj = make_elf_object((std::string(this->input_file_->filename())
666 + "(" + member_name + ")"),
667 input_file, memoff, ehdr, read_size,
672 if (parameters->options().has_plugins())
675 = parameters->options().plugins()->claim_file(input_file,
679 if (plugin_obj != NULL)
681 // The input file was claimed by a plugin, and its symbols
682 // have been provided by the plugin.
683 // Delete its elf object.
692 gold_error(_("%s: member at %zu is not an ELF object"),
693 this->name().c_str(), static_cast<size_t>(off));
699 obj->set_no_export(this->no_export());
703 // Read the symbols from all the archive members in the link.
706 Archive::read_all_symbols()
708 for (Archive::const_iterator p = this->begin();
711 this->read_symbols(p->off);
714 // Read the symbols from an archive member in the link. OFF is the file
715 // offset of the member header.
718 Archive::read_symbols(off_t off)
720 Object* obj = this->get_elf_object_for_member(off, NULL);
724 Read_symbols_data* sd = new Read_symbols_data;
725 obj->read_symbols(sd);
726 Archive_member member(obj, sd);
727 this->members_[off] = member;
730 // Select members from the archive and add them to the link. We walk
731 // through the elements in the archive map, and look each one up in
732 // the symbol table. If it exists as a strong undefined symbol, we
733 // pull in the corresponding element. We have to do this in a loop,
734 // since pulling in one element may create new undefined symbols which
735 // may be satisfied by other objects in the archive. Return true in
736 // the normal case, false if the first member we tried to add from
737 // this archive had an incompatible target.
740 Archive::add_symbols(Symbol_table* symtab, Layout* layout,
741 Input_objects* input_objects, Mapfile* mapfile)
743 ++Archive::total_archives;
745 if (this->input_file_->options().whole_archive())
746 return this->include_all_members(symtab, layout, input_objects,
749 Archive::total_members += this->num_members_;
751 input_objects->archive_start(this);
753 const size_t armap_size = this->armap_.size();
755 // This is a quick optimization, since we usually see many symbols
756 // in a row with the same offset. last_seen_offset holds the last
757 // offset we saw that was present in the seen_offsets_ set.
758 off_t last_seen_offset = -1;
760 // Track which symbols in the symbol table we've already found to be
764 size_t tmpbuflen = 0;
765 bool added_new_object;
768 added_new_object = false;
769 for (size_t i = 0; i < armap_size; ++i)
771 if (this->armap_checked_[i])
773 if (this->armap_[i].file_offset == last_seen_offset)
775 this->armap_checked_[i] = true;
778 if (this->seen_offsets_.find(this->armap_[i].file_offset)
779 != this->seen_offsets_.end())
781 this->armap_checked_[i] = true;
782 last_seen_offset = this->armap_[i].file_offset;
786 const char* sym_name = (this->armap_names_.data()
787 + this->armap_[i].name_offset);
791 Archive::Should_include t =
792 Archive::should_include_member(symtab, layout, sym_name, &sym,
793 &why, &tmpbuf, &tmpbuflen);
795 if (t == Archive::SHOULD_INCLUDE_NO
796 || t == Archive::SHOULD_INCLUDE_YES)
797 this->armap_checked_[i] = true;
799 if (t != Archive::SHOULD_INCLUDE_YES)
802 // We want to include this object in the link.
803 last_seen_offset = this->armap_[i].file_offset;
804 this->seen_offsets_.insert(last_seen_offset);
806 if (!this->include_member(symtab, layout, input_objects,
807 last_seen_offset, mapfile, sym,
815 added_new_object = true;
818 while (added_new_object);
823 input_objects->archive_stop(this);
828 // Return whether the archive includes a member which defines the
832 Archive::defines_symbol(Symbol* sym) const
834 const char* symname = sym->name();
835 size_t symname_len = strlen(symname);
836 size_t armap_size = this->armap_.size();
837 for (size_t i = 0; i < armap_size; ++i)
839 if (this->armap_checked_[i])
841 const char* archive_symname = (this->armap_names_.data()
842 + this->armap_[i].name_offset);
843 if (strncmp(archive_symname, symname, symname_len) != 0)
845 char c = archive_symname[symname_len];
846 if (c == '\0' && sym->version() == NULL)
850 const char* ver = archive_symname + symname_len + 1;
853 if (sym->version() == NULL)
857 if (sym->version() != NULL && strcmp(sym->version(), ver) == 0)
864 // Include all the archive members in the link. This is for --whole-archive.
867 Archive::include_all_members(Symbol_table* symtab, Layout* layout,
868 Input_objects* input_objects, Mapfile* mapfile)
870 // Don't include the same archive twice. This can happen if
871 // --whole-archive is nested inside --start-group (PR gold/12163).
872 if (this->included_all_members_)
875 this->included_all_members_ = true;
877 input_objects->archive_start(this);
879 if (this->members_.size() > 0)
881 std::map<off_t, Archive_member>::const_iterator p;
882 for (p = this->members_.begin();
883 p != this->members_.end();
886 if (!this->include_member(symtab, layout, input_objects, p->first,
887 mapfile, NULL, "--whole-archive"))
889 ++Archive::total_members;
894 for (Archive::const_iterator p = this->begin();
898 if (!this->include_member(symtab, layout, input_objects, p->off,
899 mapfile, NULL, "--whole-archive"))
901 ++Archive::total_members;
905 input_objects->archive_stop(this);
910 // Return the number of members in the archive. This is only used for
914 Archive::count_members()
917 for (Archive::const_iterator p = this->begin();
924 // Include an archive member in the link. OFF is the file offset of
925 // the member header. WHY is the reason we are including this member.
926 // Return true if we added the member or if we had an error, return
927 // false if this was the first member we tried to add from this
928 // archive and it had an incompatible format.
931 Archive::include_member(Symbol_table* symtab, Layout* layout,
932 Input_objects* input_objects, off_t off,
933 Mapfile* mapfile, Symbol* sym, const char* why)
935 ++Archive::total_members_loaded;
937 std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
938 if (p != this->members_.end())
940 Object* obj = p->second.obj_;
942 Read_symbols_data* sd = p->second.sd_;
944 mapfile->report_include_archive_member(obj->name(), sym, why);
945 if (input_objects->add_object(obj))
947 obj->layout(symtab, layout, sd);
948 obj->add_symbols(symtab, sd, layout);
949 this->included_member_ = true;
955 // If this is the first object we are including from this archive,
956 // and we searched for this archive, most likely because it was
957 // found via a -l option, then if the target is incompatible we want
958 // to move on to the next archive found in the search path.
959 bool unconfigured = false;
960 bool* punconfigured = NULL;
961 if (!this->included_member_ && this->searched_for())
962 punconfigured = &unconfigured;
964 Object* obj = this->get_elf_object_for_member(off, punconfigured);
967 // Return false to search for another archive, true if we found
969 return unconfigured ? false : true;
973 mapfile->report_include_archive_member(obj->name(), sym, why);
975 Pluginobj* pluginobj = obj->pluginobj();
976 if (pluginobj != NULL)
978 pluginobj->add_symbols(symtab, NULL, layout);
979 this->included_member_ = true;
983 if (!input_objects->add_object(obj))
985 // If this is an external member of a thin archive, unlock the
987 if (obj->offset() == 0)
988 obj->unlock(this->task_);
994 if (layout->incremental_inputs() != NULL)
995 layout->incremental_inputs()->report_object(obj, 0, this, NULL);
996 Read_symbols_data sd;
997 obj->read_symbols(&sd);
998 obj->layout(symtab, layout, &sd);
999 obj->add_symbols(symtab, &sd, layout);
1002 // If this is an external member of a thin archive, unlock the file
1003 // for the next task.
1004 if (obj->offset() == 0)
1005 obj->unlock(this->task_);
1007 this->included_member_ = true;
1013 // Iterate over all unused symbols, and call the visitor class V for each.
1016 Archive::do_for_all_unused_symbols(Symbol_visitor_base* v) const
1018 for (std::vector<Armap_entry>::const_iterator p = this->armap_.begin();
1019 p != this->armap_.end();
1022 if (this->seen_offsets_.find(p->file_offset)
1023 == this->seen_offsets_.end())
1024 v->visit(this->armap_names_.data() + p->name_offset);
1028 // Print statistical information to stderr. This is used for --stats.
1031 Archive::print_stats()
1033 fprintf(stderr, _("%s: archive libraries: %u\n"),
1034 program_name, Archive::total_archives);
1035 fprintf(stderr, _("%s: total archive members: %u\n"),
1036 program_name, Archive::total_members);
1037 fprintf(stderr, _("%s: loaded archive members: %u\n"),
1038 program_name, Archive::total_members_loaded);
1041 // Add_archive_symbols methods.
1043 Add_archive_symbols::~Add_archive_symbols()
1045 if (this->this_blocker_ != NULL)
1046 delete this->this_blocker_;
1047 // next_blocker_ is deleted by the task associated with the next
1051 // Return whether we can add the archive symbols. We are blocked by
1052 // this_blocker_. We block next_blocker_. We also lock the file.
1055 Add_archive_symbols::is_runnable()
1057 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1058 return this->this_blocker_;
1063 Add_archive_symbols::locks(Task_locker* tl)
1065 tl->add(this, this->next_blocker_);
1066 tl->add(this, this->archive_->token());
1070 Add_archive_symbols::run(Workqueue* workqueue)
1072 // For an incremental link, begin recording layout information.
1073 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1074 if (incremental_inputs != NULL)
1076 unsigned int arg_serial = this->input_argument_->file().arg_serial();
1077 Script_info* script_info = this->input_argument_->script_info();
1078 incremental_inputs->report_archive_begin(this->archive_, arg_serial,
1082 bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
1083 this->input_objects_,
1085 this->archive_->unlock_nested_archives();
1087 this->archive_->release();
1088 this->archive_->clear_uncached_views();
1092 // This archive holds object files which are incompatible with
1094 Read_symbols::incompatible_warning(this->input_argument_,
1095 this->archive_->input_file());
1096 Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
1097 this->layout_, this->dirpath_, this->dirindex_,
1098 this->mapfile_, this->input_argument_,
1099 this->input_group_, this->next_blocker_);
1100 delete this->archive_;
1104 if (this->input_group_ != NULL)
1105 this->input_group_->add_archive(this->archive_);
1108 // For an incremental link, finish recording the layout information.
1109 if (incremental_inputs != NULL)
1110 incremental_inputs->report_archive_end(this->archive_);
1112 if (!parameters->options().has_plugins()
1113 || this->archive_->input_file()->options().whole_archive())
1115 // We no longer need to know about this archive.
1116 delete this->archive_;
1120 // The plugin interface may want to rescan this archive.
1121 parameters->options().plugins()->save_archive(this->archive_);
1124 this->archive_ = NULL;
1128 // Class Lib_group static variables.
1129 unsigned int Lib_group::total_lib_groups;
1130 unsigned int Lib_group::total_members;
1131 unsigned int Lib_group::total_members_loaded;
1133 Lib_group::Lib_group(const Input_file_lib* lib, Task* task)
1134 : Library_base(task), members_()
1136 this->members_.resize(lib->size());
1140 Lib_group::do_filename() const
1142 std::string *filename = new std::string("/group/");
1146 // Select members from the lib group and add them to the link. We walk
1147 // through the members, and check if each one up should be included.
1148 // If the object says it should be included, we do so. We have to do
1149 // this in a loop, since including one member may create new undefined
1150 // symbols which may be satisfied by other members.
1153 Lib_group::add_symbols(Symbol_table* symtab, Layout* layout,
1154 Input_objects* input_objects)
1156 ++Lib_group::total_lib_groups;
1158 Lib_group::total_members += this->members_.size();
1160 bool added_new_object;
1163 added_new_object = false;
1165 while (i < this->members_.size())
1167 const Archive_member& member = this->members_[i];
1168 Object* obj = member.obj_;
1171 // Skip files with no symbols. Plugin objects have
1172 // member.sd_ == NULL.
1174 && (member.sd_ == NULL || member.sd_->symbol_names != NULL))
1176 Archive::Should_include t = obj->should_include_member(symtab,
1181 if (t != Archive::SHOULD_INCLUDE_YES)
1187 this->include_member(symtab, layout, input_objects, member);
1189 added_new_object = true;
1193 if (member.sd_ != NULL)
1195 // The file must be locked in order to destroy the views
1196 // associated with it.
1197 gold_assert(obj != NULL);
1198 obj->lock(this->task_);
1200 obj->unlock(this->task_);
1204 this->members_[i] = this->members_.back();
1205 this->members_.pop_back();
1208 while (added_new_object);
1211 // Include a lib group member in the link.
1214 Lib_group::include_member(Symbol_table* symtab, Layout* layout,
1215 Input_objects* input_objects,
1216 const Archive_member& member)
1218 ++Lib_group::total_members_loaded;
1220 Object* obj = member.obj_;
1221 gold_assert(obj != NULL);
1223 Pluginobj* pluginobj = obj->pluginobj();
1224 if (pluginobj != NULL)
1226 pluginobj->add_symbols(symtab, NULL, layout);
1230 Read_symbols_data* sd = member.sd_;
1231 gold_assert(sd != NULL);
1232 obj->lock(this->task_);
1233 if (input_objects->add_object(obj))
1235 if (layout->incremental_inputs() != NULL)
1236 layout->incremental_inputs()->report_object(obj, member.arg_serial_,
1238 obj->layout(symtab, layout, sd);
1239 obj->add_symbols(symtab, sd, layout);
1242 // Unlock the file for the next task.
1243 obj->unlock(this->task_);
1246 // Iterate over all unused symbols, and call the visitor class V for each.
1249 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base* v) const
1251 // Files are removed from the members list when used, so all the
1252 // files remaining on the list are unused.
1253 for (std::vector<Archive_member>::const_iterator p = this->members_.begin();
1254 p != this->members_.end();
1257 Object* obj = p->obj_;
1258 obj->for_all_global_symbols(p->sd_, v);
1262 // Print statistical information to stderr. This is used for --stats.
1265 Lib_group::print_stats()
1267 fprintf(stderr, _("%s: lib groups: %u\n"),
1268 program_name, Lib_group::total_lib_groups);
1269 fprintf(stderr, _("%s: total lib groups members: %u\n"),
1270 program_name, Lib_group::total_members);
1271 fprintf(stderr, _("%s: loaded lib groups members: %u\n"),
1272 program_name, Lib_group::total_members_loaded);
1276 Add_lib_group_symbols::is_runnable()
1278 if (this->readsyms_blocker_ != NULL && this->readsyms_blocker_->is_blocked())
1279 return this->readsyms_blocker_;
1280 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1281 return this->this_blocker_;
1286 Add_lib_group_symbols::locks(Task_locker* tl)
1288 tl->add(this, this->next_blocker_);
1292 Add_lib_group_symbols::run(Workqueue*)
1294 // For an incremental link, begin recording layout information.
1295 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1296 if (incremental_inputs != NULL)
1297 incremental_inputs->report_archive_begin(this->lib_, 0, NULL);
1299 this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_);
1301 if (incremental_inputs != NULL)
1302 incremental_inputs->report_archive_end(this->lib_);
1305 Add_lib_group_symbols::~Add_lib_group_symbols()
1307 if (this->this_blocker_ != NULL)
1308 delete this->this_blocker_;
1309 // next_blocker_ is deleted by the task associated with the next
1313 } // End namespace gold.