1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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 // Library_base methods.
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.
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,
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, '@');
70 size_t symlen = ver - sym_name;
71 if (symlen + 1 > *tmpbuflen)
73 tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1));
75 *tmpbuflen = symlen + 1;
77 memcpy(tmpbuf, sym_name, symlen);
78 tmpbuf[symlen] = '\0';
89 Symbol* sym = symtab->lookup(sym_name, ver);
93 || !sym->is_undefined()
94 || sym->binding() == elfcpp::STB_WEAK))
95 sym = symtab->lookup(sym_name, NULL);
101 // Check whether the symbol was named in a -u option.
102 if (parameters->options().is_undefined(sym_name))
107 else if (parameters->options().is_export_dynamic_symbol(sym_name))
109 *why = "--export-dynamic-symbol ";
112 else if (layout->script_options()->is_referenced(sym_name))
114 size_t alc = 100 + strlen(sym_name);
115 char* buf = new char[alc];
116 snprintf(buf, alc, _("script or expression reference to %s"),
121 else if (strcmp(sym_name, parameters->entry()) == 0)
123 *why = "entry symbol ";
127 return Library_base::SHOULD_INCLUDE_UNKNOWN;
129 else if (!sym->is_undefined())
130 return Library_base::SHOULD_INCLUDE_NO;
131 // PR 12001: Do not include an archive when the undefined
132 // symbol has actually been defined on the command line.
133 else if (layout->script_options()->is_pending_assignment(sym_name))
134 return Library_base::SHOULD_INCLUDE_NO;
135 else if (sym->binding() == elfcpp::STB_WEAK)
136 return Library_base::SHOULD_INCLUDE_UNKNOWN;
138 return Library_base::SHOULD_INCLUDE_YES;
141 // The header of an entry in the archive. This is all readable text,
142 // padded with spaces where necessary. If the contents of an archive
143 // are all text file, the entire archive is readable.
145 struct Archive::Archive_header
149 // The file modification time.
151 // The user's UID in decimal.
153 // The user's GID in decimal.
155 // The file mode in octal.
157 // The file size in decimal.
159 // The final magic code.
163 // Class Archive static variables.
164 unsigned int Archive::total_archives;
165 unsigned int Archive::total_members;
166 unsigned int Archive::total_members_loaded;
170 const char Archive::armag[sarmag] =
172 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
175 const char Archive::armagt[sarmag] =
177 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
180 const char Archive::arfmag[2] = { '`', '\n' };
182 Archive::Archive(const std::string& name, Input_file* input_file,
183 bool is_thin_archive, Dirsearch* dirpath, Task* task)
184 : Library_base(task), name_(name), input_file_(input_file), armap_(),
185 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
186 members_(), is_thin_archive_(is_thin_archive), included_member_(false),
187 nested_archives_(), dirpath_(dirpath), num_members_(0),
188 included_all_members_(false)
191 parameters->options().check_excluded_libs(input_file->found_name());
194 // Set up the archive: read the symbol map and the extended name
200 // We need to ignore empty archives.
201 if (this->input_file_->file().filesize() == sarmag)
204 // The first member of the archive should be the symbol table.
205 std::string armap_name;
206 off_t header_size = this->read_header(sarmag, false, &armap_name, NULL);
207 if (header_size == -1)
210 section_size_type armap_size = convert_to_section_size_type(header_size);
212 if (armap_name.empty())
214 this->read_armap(sarmag + sizeof(Archive_header), armap_size);
215 off = sarmag + sizeof(Archive_header) + armap_size;
217 else if (!this->input_file_->options().whole_archive())
218 gold_error(_("%s: no archive symbol table (run ranlib)"),
219 this->name().c_str());
221 // See if there is an extended name table. We cache these views
222 // because it is likely that we will want to read the following
223 // header in the add_symbols routine.
227 header_size = this->read_header(off, true, &xname, NULL);
228 if (header_size == -1)
231 section_size_type extended_size = convert_to_section_size_type(header_size);
234 const unsigned char* p = this->get_view(off + sizeof(Archive_header),
235 extended_size, false, true);
236 const char* px = reinterpret_cast<const char*>(p);
237 this->extended_names_.assign(px, extended_size);
239 bool preread_syms = (parameters->options().threads()
240 && parameters->options().preread_archive_symbols());
241 #ifndef ENABLE_THREADS
242 preread_syms = false;
244 if (parameters->options().has_plugins())
245 preread_syms = false;
248 this->read_all_symbols();
251 // Unlock any nested archives.
254 Archive::unlock_nested_archives()
256 for (Nested_archive_table::iterator p = this->nested_archives_.begin();
257 p != this->nested_archives_.end();
260 p->second->unlock(this->task_);
264 // Read the archive symbol map.
267 Archive::read_armap(off_t start, section_size_type size)
269 // To count the total number of archive members, we'll just count
270 // the number of times the file offset changes. Since most archives
271 // group the symbols in the armap by object, this ought to give us
272 // an accurate count.
273 off_t last_seen_offset = -1;
275 // Read in the entire armap.
276 const unsigned char* p = this->get_view(start, size, true, false);
278 // Numbers in the armap are always big-endian.
279 const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
280 unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
283 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
284 const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
285 section_size_type names_size =
286 reinterpret_cast<const char*>(p) + size - pnames;
287 this->armap_names_.assign(pnames, names_size);
289 this->armap_.resize(nsyms);
291 section_offset_type name_offset = 0;
292 for (unsigned int i = 0; i < nsyms; ++i)
294 this->armap_[i].name_offset = name_offset;
295 this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
296 name_offset += strlen(pnames + name_offset) + 1;
298 if (this->armap_[i].file_offset != last_seen_offset)
300 last_seen_offset = this->armap_[i].file_offset;
301 ++this->num_members_;
305 if (static_cast<section_size_type>(name_offset) > names_size)
306 gold_error(_("%s: bad archive symbol table names"),
307 this->name().c_str());
309 // This array keeps track of which symbols are for archive elements
310 // which we have already included in the link.
311 this->armap_checked_.resize(nsyms);
314 // Read the header of an archive member at OFF. Fail if something
315 // goes wrong. Return the size of the member. Set *PNAME to the name
319 Archive::read_header(off_t off, bool cache, std::string* pname,
322 const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
324 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
325 return this->interpret_header(hdr, off, pname, nested_off);
328 // Interpret the header of HDR, the header of the archive member at
329 // file offset OFF. Return the size of the member, or -1 if something
330 // has gone wrong. Set *PNAME to the name of the member.
333 Archive::interpret_header(const Archive_header* hdr, off_t off,
334 std::string* pname, off_t* nested_off) const
336 if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
338 gold_error(_("%s: malformed archive header at %zu"),
339 this->name().c_str(), static_cast<size_t>(off));
343 const int size_string_size = sizeof hdr->ar_size;
344 char size_string[size_string_size + 1];
345 memcpy(size_string, hdr->ar_size, size_string_size);
346 char* ps = size_string + size_string_size;
347 while (ps[-1] == ' ')
353 off_t member_size = strtol(size_string, &end, 10);
356 || (member_size == LONG_MAX && errno == ERANGE))
358 gold_error(_("%s: malformed archive header size at %zu"),
359 this->name().c_str(), static_cast<size_t>(off));
363 if (hdr->ar_name[0] != '/')
365 const char* name_end = strchr(hdr->ar_name, '/');
367 || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
369 gold_error(_("%s: malformed archive header name at %zu"),
370 this->name().c_str(), static_cast<size_t>(off));
373 pname->assign(hdr->ar_name, name_end - hdr->ar_name);
374 if (nested_off != NULL)
377 else if (hdr->ar_name[1] == ' ')
379 // This is the symbol table.
383 else if (hdr->ar_name[1] == '/')
385 // This is the extended name table.
386 pname->assign(1, '/');
391 long x = strtol(hdr->ar_name + 1, &end, 10);
394 y = strtol(end + 1, &end, 10);
397 || (x == LONG_MAX && errno == ERANGE)
398 || static_cast<size_t>(x) >= this->extended_names_.size())
400 gold_error(_("%s: bad extended name index at %zu"),
401 this->name().c_str(), static_cast<size_t>(off));
405 const char* name = this->extended_names_.data() + x;
406 const char* name_end = strchr(name, '\n');
407 if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
408 || name_end[-1] != '/')
410 gold_error(_("%s: bad extended name entry at header %zu"),
411 this->name().c_str(), static_cast<size_t>(off));
414 pname->assign(name, name_end - 1 - name);
415 if (nested_off != NULL)
422 // An archive member iterator.
424 class Archive::const_iterator
427 // The header of an archive member. This is what this iterator
431 // The name of the member.
433 // The file offset of the member.
435 // The file offset of a nested archive member.
437 // The size of the member.
441 const_iterator(Archive* archive, off_t off)
442 : archive_(archive), off_(off)
443 { this->read_next_header(); }
447 { return this->header_; }
451 { return &this->header_; }
456 if (this->off_ == this->archive_->file().filesize())
458 this->off_ += sizeof(Archive_header);
459 if (!this->archive_->is_thin_archive())
460 this->off_ += this->header_.size;
461 if ((this->off_ & 1) != 0)
463 this->read_next_header();
470 const_iterator ret = *this;
476 operator==(const const_iterator p) const
477 { return this->off_ == p->off; }
480 operator!=(const const_iterator p) const
481 { return this->off_ != p->off; }
487 // The underlying archive.
489 // The current offset in the file.
491 // The current archive header.
495 // Read the next archive header.
498 Archive::const_iterator::read_next_header()
500 off_t filesize = this->archive_->file().filesize();
503 if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
505 if (filesize != this->off_)
507 gold_error(_("%s: short archive header at %zu"),
508 this->archive_->filename().c_str(),
509 static_cast<size_t>(this->off_));
510 this->off_ = filesize;
512 this->header_.off = filesize;
516 unsigned char buf[sizeof(Archive_header)];
517 this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
519 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
520 off_t size = this->archive_->interpret_header(hdr, this->off_,
522 &this->header_.nested_off);
525 this->header_.off = filesize;
529 this->header_.size = size;
530 this->header_.off = this->off_;
532 // Skip special members.
533 if (!this->header_.name.empty() && this->header_.name != "/")
536 this->off_ += sizeof(Archive_header) + this->header_.size;
537 if ((this->off_ & 1) != 0)
544 Archive::const_iterator
547 return Archive::const_iterator(this, sarmag);
552 Archive::const_iterator
555 return Archive::const_iterator(this, this->input_file_->file().filesize());
558 // Get the file and offset for an archive member, which may be an
559 // external member of a thin archive. Set *INPUT_FILE to the
560 // file containing the actual member, *MEMOFF to the offset
561 // within that file (0 if not a nested archive), and *MEMBER_NAME
562 // to the name of the archive member. Return TRUE on success.
565 Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
566 off_t* memsize, std::string* member_name)
570 *memsize = this->read_header(off, false, member_name, &nested_off);
574 *input_file = this->input_file_;
575 *memoff = off + static_cast<off_t>(sizeof(Archive_header));
577 if (!this->is_thin_archive_)
580 // Adjust a relative pathname so that it is relative
581 // to the directory containing the archive.
582 if (!IS_ABSOLUTE_PATH(member_name->c_str()))
584 const char* arch_path = this->filename().c_str();
585 const char* basename = lbasename(arch_path);
586 if (basename > arch_path)
587 member_name->replace(0, 0,
588 this->filename().substr(0, basename - arch_path));
593 // This is a member of a nested archive. Open the containing
594 // archive if we don't already have it open, then do a recursive
595 // call to include the member from that archive.
597 Nested_archive_table::const_iterator p =
598 this->nested_archives_.find(*member_name);
599 if (p != this->nested_archives_.end())
603 Input_file_argument* input_file_arg =
604 new Input_file_argument(member_name->c_str(),
605 Input_file_argument::INPUT_FILE_TYPE_FILE,
606 "", false, parameters->options());
607 *input_file = new Input_file(input_file_arg);
609 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
611 arch = new Archive(*member_name, *input_file, false, this->dirpath_,
614 std::pair<Nested_archive_table::iterator, bool> ins =
615 this->nested_archives_.insert(std::make_pair(*member_name, arch));
616 gold_assert(ins.second);
618 return arch->get_file_and_offset(nested_off, input_file, memoff,
619 memsize, member_name);
622 // This is an external member of a thin archive. Open the
623 // file as a regular relocatable object file.
624 Input_file_argument* input_file_arg =
625 new Input_file_argument(member_name->c_str(),
626 Input_file_argument::INPUT_FILE_TYPE_FILE,
627 "", false, this->input_file_->options());
628 *input_file = new Input_file(input_file_arg);
630 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
634 *memsize = (*input_file)->file().filesize();
638 // Return an ELF object for the member at offset OFF. If
639 // PUNCONFIGURED is not NULL, then if the ELF object has an
640 // unsupported target type, set *PUNCONFIGURED to true and return
644 Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
646 if (punconfigured != NULL)
647 *punconfigured = false;
649 Input_file* input_file;
652 std::string member_name;
653 if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
657 const unsigned char* ehdr;
660 bool is_elf_obj = false;
662 if (is_elf_object(input_file, memoff, &ehdr, &read_size))
664 obj = make_elf_object((std::string(this->input_file_->filename())
665 + "(" + member_name + ")"),
666 input_file, memoff, ehdr, read_size,
671 if (parameters->options().has_plugins())
674 = parameters->options().plugins()->claim_file(input_file,
678 if (plugin_obj != NULL)
680 // The input file was claimed by a plugin, and its symbols
681 // have been provided by the plugin.
682 // Delete its elf object.
691 gold_error(_("%s: member at %zu is not an ELF object"),
692 this->name().c_str(), static_cast<size_t>(off));
698 obj->set_no_export(this->no_export());
702 // Read the symbols from all the archive members in the link.
705 Archive::read_all_symbols()
707 for (Archive::const_iterator p = this->begin();
710 this->read_symbols(p->off);
713 // Read the symbols from an archive member in the link. OFF is the file
714 // offset of the member header.
717 Archive::read_symbols(off_t off)
719 Object* obj = this->get_elf_object_for_member(off, NULL);
723 Read_symbols_data* sd = new Read_symbols_data;
724 obj->read_symbols(sd);
725 Archive_member member(obj, sd);
726 this->members_[off] = member;
729 // Select members from the archive and add them to the link. We walk
730 // through the elements in the archive map, and look each one up in
731 // the symbol table. If it exists as a strong undefined symbol, we
732 // pull in the corresponding element. We have to do this in a loop,
733 // since pulling in one element may create new undefined symbols which
734 // may be satisfied by other objects in the archive. Return true in
735 // the normal case, false if the first member we tried to add from
736 // this archive had an incompatible target.
739 Archive::add_symbols(Symbol_table* symtab, Layout* layout,
740 Input_objects* input_objects, Mapfile* mapfile)
742 ++Archive::total_archives;
744 if (this->input_file_->options().whole_archive())
745 return this->include_all_members(symtab, layout, input_objects,
748 Archive::total_members += this->num_members_;
750 input_objects->archive_start(this);
752 const size_t armap_size = this->armap_.size();
754 // This is a quick optimization, since we usually see many symbols
755 // in a row with the same offset. last_seen_offset holds the last
756 // offset we saw that was present in the seen_offsets_ set.
757 off_t last_seen_offset = -1;
759 // Track which symbols in the symbol table we've already found to be
763 size_t tmpbuflen = 0;
764 bool added_new_object;
767 added_new_object = false;
768 for (size_t i = 0; i < armap_size; ++i)
770 if (this->armap_checked_[i])
772 if (this->armap_[i].file_offset == last_seen_offset)
774 this->armap_checked_[i] = true;
777 if (this->seen_offsets_.find(this->armap_[i].file_offset)
778 != this->seen_offsets_.end())
780 this->armap_checked_[i] = true;
781 last_seen_offset = this->armap_[i].file_offset;
785 const char* sym_name = (this->armap_names_.data()
786 + this->armap_[i].name_offset);
790 Archive::Should_include t =
791 Archive::should_include_member(symtab, layout, sym_name, &sym,
792 &why, &tmpbuf, &tmpbuflen);
794 if (t == Archive::SHOULD_INCLUDE_NO
795 || t == Archive::SHOULD_INCLUDE_YES)
796 this->armap_checked_[i] = true;
798 if (t != Archive::SHOULD_INCLUDE_YES)
801 // We want to include this object in the link.
802 last_seen_offset = this->armap_[i].file_offset;
803 this->seen_offsets_.insert(last_seen_offset);
805 if (!this->include_member(symtab, layout, input_objects,
806 last_seen_offset, mapfile, sym,
814 added_new_object = true;
817 while (added_new_object);
822 input_objects->archive_stop(this);
827 // Return whether the archive includes a member which defines the
831 Archive::defines_symbol(Symbol* sym) const
833 const char* symname = sym->name();
834 size_t symname_len = strlen(symname);
835 size_t armap_size = this->armap_.size();
836 for (size_t i = 0; i < armap_size; ++i)
838 if (this->armap_checked_[i])
840 const char* archive_symname = (this->armap_names_.data()
841 + this->armap_[i].name_offset);
842 if (strncmp(archive_symname, symname, symname_len) != 0)
844 char c = archive_symname[symname_len];
845 if (c == '\0' && sym->version() == NULL)
849 const char* ver = archive_symname + symname_len + 1;
852 if (sym->version() == NULL)
856 if (sym->version() != NULL && strcmp(sym->version(), ver) == 0)
863 // Include all the archive members in the link. This is for --whole-archive.
866 Archive::include_all_members(Symbol_table* symtab, Layout* layout,
867 Input_objects* input_objects, Mapfile* mapfile)
869 // Don't include the same archive twice. This can happen if
870 // --whole-archive is nested inside --start-group (PR gold/12163).
871 if (this->included_all_members_)
874 this->included_all_members_ = true;
876 input_objects->archive_start(this);
878 if (this->members_.size() > 0)
880 std::map<off_t, Archive_member>::const_iterator p;
881 for (p = this->members_.begin();
882 p != this->members_.end();
885 if (!this->include_member(symtab, layout, input_objects, p->first,
886 mapfile, NULL, "--whole-archive"))
888 ++Archive::total_members;
893 for (Archive::const_iterator p = this->begin();
897 if (!this->include_member(symtab, layout, input_objects, p->off,
898 mapfile, NULL, "--whole-archive"))
900 ++Archive::total_members;
904 input_objects->archive_stop(this);
909 // Return the number of members in the archive. This is only used for
913 Archive::count_members()
916 for (Archive::const_iterator p = this->begin();
923 // Include an archive member in the link. OFF is the file offset of
924 // the member header. WHY is the reason we are including this member.
925 // Return true if we added the member or if we had an error, return
926 // false if this was the first member we tried to add from this
927 // archive and it had an incompatible format.
930 Archive::include_member(Symbol_table* symtab, Layout* layout,
931 Input_objects* input_objects, off_t off,
932 Mapfile* mapfile, Symbol* sym, const char* why)
934 ++Archive::total_members_loaded;
936 std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
937 if (p != this->members_.end())
939 Object* obj = p->second.obj_;
941 Read_symbols_data* sd = p->second.sd_;
943 mapfile->report_include_archive_member(obj->name(), sym, why);
944 if (input_objects->add_object(obj))
946 obj->layout(symtab, layout, sd);
947 obj->add_symbols(symtab, sd, layout);
948 this->included_member_ = true;
954 // If this is the first object we are including from this archive,
955 // and we searched for this archive, most likely because it was
956 // found via a -l option, then if the target is incompatible we want
957 // to move on to the next archive found in the search path.
958 bool unconfigured = false;
959 bool* punconfigured = NULL;
960 if (!this->included_member_ && this->searched_for())
961 punconfigured = &unconfigured;
963 Object* obj = this->get_elf_object_for_member(off, punconfigured);
966 // Return false to search for another archive, true if we found
968 return unconfigured ? false : true;
972 mapfile->report_include_archive_member(obj->name(), sym, why);
974 Pluginobj* pluginobj = obj->pluginobj();
975 if (pluginobj != NULL)
977 pluginobj->add_symbols(symtab, NULL, layout);
978 this->included_member_ = true;
982 if (!input_objects->add_object(obj))
984 // If this is an external member of a thin archive, unlock the
986 if (obj->offset() == 0)
987 obj->unlock(this->task_);
993 if (layout->incremental_inputs() != NULL)
994 layout->incremental_inputs()->report_object(obj, 0, this, NULL);
995 Read_symbols_data sd;
996 obj->read_symbols(&sd);
997 obj->layout(symtab, layout, &sd);
998 obj->add_symbols(symtab, &sd, layout);
1001 // If this is an external member of a thin archive, unlock the file
1002 // for the next task.
1003 if (obj->offset() == 0)
1004 obj->unlock(this->task_);
1006 this->included_member_ = true;
1012 // Iterate over all unused symbols, and call the visitor class V for each.
1015 Archive::do_for_all_unused_symbols(Symbol_visitor_base* v) const
1017 for (std::vector<Armap_entry>::const_iterator p = this->armap_.begin();
1018 p != this->armap_.end();
1021 if (this->seen_offsets_.find(p->file_offset)
1022 == this->seen_offsets_.end())
1023 v->visit(this->armap_names_.data() + p->name_offset);
1027 // Print statistical information to stderr. This is used for --stats.
1030 Archive::print_stats()
1032 fprintf(stderr, _("%s: archive libraries: %u\n"),
1033 program_name, Archive::total_archives);
1034 fprintf(stderr, _("%s: total archive members: %u\n"),
1035 program_name, Archive::total_members);
1036 fprintf(stderr, _("%s: loaded archive members: %u\n"),
1037 program_name, Archive::total_members_loaded);
1040 // Add_archive_symbols methods.
1042 Add_archive_symbols::~Add_archive_symbols()
1044 if (this->this_blocker_ != NULL)
1045 delete this->this_blocker_;
1046 // next_blocker_ is deleted by the task associated with the next
1050 // Return whether we can add the archive symbols. We are blocked by
1051 // this_blocker_. We block next_blocker_. We also lock the file.
1054 Add_archive_symbols::is_runnable()
1056 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1057 return this->this_blocker_;
1062 Add_archive_symbols::locks(Task_locker* tl)
1064 tl->add(this, this->next_blocker_);
1065 tl->add(this, this->archive_->token());
1069 Add_archive_symbols::run(Workqueue* workqueue)
1071 // For an incremental link, begin recording layout information.
1072 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1073 if (incremental_inputs != NULL)
1075 unsigned int arg_serial = this->input_argument_->file().arg_serial();
1076 Script_info* script_info = this->input_argument_->script_info();
1077 incremental_inputs->report_archive_begin(this->archive_, arg_serial,
1081 bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
1082 this->input_objects_,
1084 this->archive_->unlock_nested_archives();
1086 this->archive_->release();
1087 this->archive_->clear_uncached_views();
1091 // This archive holds object files which are incompatible with
1093 Read_symbols::incompatible_warning(this->input_argument_,
1094 this->archive_->input_file());
1095 Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
1096 this->layout_, this->dirpath_, this->dirindex_,
1097 this->mapfile_, this->input_argument_,
1098 this->input_group_, this->next_blocker_);
1099 delete this->archive_;
1103 if (this->input_group_ != NULL)
1104 this->input_group_->add_archive(this->archive_);
1107 // For an incremental link, finish recording the layout information.
1108 if (incremental_inputs != NULL)
1109 incremental_inputs->report_archive_end(this->archive_);
1111 if (!parameters->options().has_plugins()
1112 || this->archive_->input_file()->options().whole_archive())
1114 // We no longer need to know about this archive.
1115 delete this->archive_;
1119 // The plugin interface may want to rescan this archive.
1120 parameters->options().plugins()->save_archive(this->archive_);
1123 this->archive_ = NULL;
1127 // Class Lib_group static variables.
1128 unsigned int Lib_group::total_lib_groups;
1129 unsigned int Lib_group::total_members;
1130 unsigned int Lib_group::total_members_loaded;
1132 Lib_group::Lib_group(const Input_file_lib* lib, Task* task)
1133 : Library_base(task), lib_(lib), members_()
1135 this->members_.resize(lib->size());
1139 Lib_group::do_filename() const
1141 std::string *filename = new std::string("/group/");
1145 // Select members from the lib group and add them to the link. We walk
1146 // through the members, and check if each one up should be included.
1147 // If the object says it should be included, we do so. We have to do
1148 // this in a loop, since including one member may create new undefined
1149 // symbols which may be satisfied by other members.
1152 Lib_group::add_symbols(Symbol_table* symtab, Layout* layout,
1153 Input_objects* input_objects)
1155 ++Lib_group::total_lib_groups;
1157 Lib_group::total_members += this->members_.size();
1159 bool added_new_object;
1162 added_new_object = false;
1164 while (i < this->members_.size())
1166 const Archive_member& member = this->members_[i];
1167 Object* obj = member.obj_;
1170 // Skip files with no symbols. Plugin objects have
1171 // member.sd_ == NULL.
1173 && (member.sd_ == NULL || member.sd_->symbol_names != NULL))
1175 Archive::Should_include t = obj->should_include_member(symtab,
1180 if (t != Archive::SHOULD_INCLUDE_YES)
1186 this->include_member(symtab, layout, input_objects, member);
1188 added_new_object = true;
1192 if (member.sd_ != NULL)
1194 // The file must be locked in order to destroy the views
1195 // associated with it.
1196 gold_assert(obj != NULL);
1197 obj->lock(this->task_);
1199 obj->unlock(this->task_);
1203 this->members_[i] = this->members_.back();
1204 this->members_.pop_back();
1207 while (added_new_object);
1210 // Include a lib group member in the link.
1213 Lib_group::include_member(Symbol_table* symtab, Layout* layout,
1214 Input_objects* input_objects,
1215 const Archive_member& member)
1217 ++Lib_group::total_members_loaded;
1219 Object* obj = member.obj_;
1220 gold_assert(obj != NULL);
1222 Pluginobj* pluginobj = obj->pluginobj();
1223 if (pluginobj != NULL)
1225 pluginobj->add_symbols(symtab, NULL, layout);
1229 Read_symbols_data* sd = member.sd_;
1230 gold_assert(sd != NULL);
1231 obj->lock(this->task_);
1232 if (input_objects->add_object(obj))
1234 if (layout->incremental_inputs() != NULL)
1235 layout->incremental_inputs()->report_object(obj, member.arg_serial_,
1237 obj->layout(symtab, layout, sd);
1238 obj->add_symbols(symtab, sd, layout);
1241 // Unlock the file for the next task.
1242 obj->unlock(this->task_);
1245 // Iterate over all unused symbols, and call the visitor class V for each.
1248 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base* v) const
1250 // Files are removed from the members list when used, so all the
1251 // files remaining on the list are unused.
1252 for (std::vector<Archive_member>::const_iterator p = this->members_.begin();
1253 p != this->members_.end();
1256 Object* obj = p->obj_;
1257 obj->for_all_global_symbols(p->sd_, v);
1261 // Print statistical information to stderr. This is used for --stats.
1264 Lib_group::print_stats()
1266 fprintf(stderr, _("%s: lib groups: %u\n"),
1267 program_name, Lib_group::total_lib_groups);
1268 fprintf(stderr, _("%s: total lib groups members: %u\n"),
1269 program_name, Lib_group::total_members);
1270 fprintf(stderr, _("%s: loaded lib groups members: %u\n"),
1271 program_name, Lib_group::total_members_loaded);
1275 Add_lib_group_symbols::is_runnable()
1277 if (this->readsyms_blocker_ != NULL && this->readsyms_blocker_->is_blocked())
1278 return this->readsyms_blocker_;
1279 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1280 return this->this_blocker_;
1285 Add_lib_group_symbols::locks(Task_locker* tl)
1287 tl->add(this, this->next_blocker_);
1291 Add_lib_group_symbols::run(Workqueue*)
1293 // For an incremental link, begin recording layout information.
1294 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1295 if (incremental_inputs != NULL)
1296 incremental_inputs->report_archive_begin(this->lib_, 0, NULL);
1298 this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_);
1300 if (incremental_inputs != NULL)
1301 incremental_inputs->report_archive_end(this->lib_);
1304 Add_lib_group_symbols::~Add_lib_group_symbols()
1306 if (this->this_blocker_ != NULL)
1307 delete this->this_blocker_;
1308 // next_blocker_ is deleted by the task associated with the next
1312 } // End namespace gold.