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 if (parameters
->options().has_plugins())
659 Object
* obj
= parameters
->options().plugins()->claim_file(input_file
,
665 // The input file was claimed by a plugin, and its symbols
666 // have been provided by the plugin.
671 const unsigned char* ehdr
;
673 if (!is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
675 gold_error(_("%s: member at %zu is not an ELF object"),
676 this->name().c_str(), static_cast<size_t>(off
));
680 Object
* obj
= make_elf_object((std::string(this->input_file_
->filename())
681 + "(" + member_name
+ ")"),
682 input_file
, memoff
, ehdr
, read_size
,
686 obj
->set_no_export(this->no_export());
690 // Read the symbols from all the archive members in the link.
693 Archive::read_all_symbols()
695 for (Archive::const_iterator p
= this->begin();
698 this->read_symbols(p
->off
);
701 // Read the symbols from an archive member in the link. OFF is the file
702 // offset of the member header.
705 Archive::read_symbols(off_t off
)
707 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
711 Read_symbols_data
* sd
= new Read_symbols_data
;
712 obj
->read_symbols(sd
);
713 Archive_member
member(obj
, sd
);
714 this->members_
[off
] = member
;
717 // Select members from the archive and add them to the link. We walk
718 // through the elements in the archive map, and look each one up in
719 // the symbol table. If it exists as a strong undefined symbol, we
720 // pull in the corresponding element. We have to do this in a loop,
721 // since pulling in one element may create new undefined symbols which
722 // may be satisfied by other objects in the archive. Return true in
723 // the normal case, false if the first member we tried to add from
724 // this archive had an incompatible target.
727 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
728 Input_objects
* input_objects
, Mapfile
* mapfile
)
730 ++Archive::total_archives
;
732 if (this->input_file_
->options().whole_archive())
733 return this->include_all_members(symtab
, layout
, input_objects
,
736 Archive::total_members
+= this->num_members_
;
738 input_objects
->archive_start(this);
740 const size_t armap_size
= this->armap_
.size();
742 // This is a quick optimization, since we usually see many symbols
743 // in a row with the same offset. last_seen_offset holds the last
744 // offset we saw that was present in the seen_offsets_ set.
745 off_t last_seen_offset
= -1;
747 // Track which symbols in the symbol table we've already found to be
751 size_t tmpbuflen
= 0;
752 bool added_new_object
;
755 added_new_object
= false;
756 for (size_t i
= 0; i
< armap_size
; ++i
)
758 if (this->armap_checked_
[i
])
760 if (this->armap_
[i
].file_offset
== last_seen_offset
)
762 this->armap_checked_
[i
] = true;
765 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
766 != this->seen_offsets_
.end())
768 this->armap_checked_
[i
] = true;
769 last_seen_offset
= this->armap_
[i
].file_offset
;
773 const char* sym_name
= (this->armap_names_
.data()
774 + this->armap_
[i
].name_offset
);
778 Archive::Should_include t
=
779 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
780 &why
, &tmpbuf
, &tmpbuflen
);
782 if (t
== Archive::SHOULD_INCLUDE_NO
783 || t
== Archive::SHOULD_INCLUDE_YES
)
784 this->armap_checked_
[i
] = true;
786 if (t
!= Archive::SHOULD_INCLUDE_YES
)
789 // We want to include this object in the link.
790 last_seen_offset
= this->armap_
[i
].file_offset
;
791 this->seen_offsets_
.insert(last_seen_offset
);
793 if (!this->include_member(symtab
, layout
, input_objects
,
794 last_seen_offset
, mapfile
, sym
,
802 added_new_object
= true;
805 while (added_new_object
);
810 input_objects
->archive_stop(this);
815 // Return whether the archive includes a member which defines the
819 Archive::defines_symbol(Symbol
* sym
) const
821 const char* symname
= sym
->name();
822 size_t symname_len
= strlen(symname
);
823 size_t armap_size
= this->armap_
.size();
824 for (size_t i
= 0; i
< armap_size
; ++i
)
826 if (this->armap_checked_
[i
])
828 const char* archive_symname
= (this->armap_names_
.data()
829 + this->armap_
[i
].name_offset
);
830 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
832 char c
= archive_symname
[symname_len
];
833 if (c
== '\0' && sym
->version() == NULL
)
837 const char* ver
= archive_symname
+ symname_len
+ 1;
840 if (sym
->version() == NULL
)
844 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
851 // Include all the archive members in the link. This is for --whole-archive.
854 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
855 Input_objects
* input_objects
, Mapfile
* mapfile
)
857 // Don't include the same archive twice. This can happen if
858 // --whole-archive is nested inside --start-group (PR gold/12163).
859 if (this->included_all_members_
)
862 this->included_all_members_
= true;
864 input_objects
->archive_start(this);
866 if (this->members_
.size() > 0)
868 std::map
<off_t
, Archive_member
>::const_iterator p
;
869 for (p
= this->members_
.begin();
870 p
!= this->members_
.end();
873 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
874 mapfile
, NULL
, "--whole-archive"))
876 ++Archive::total_members
;
881 for (Archive::const_iterator p
= this->begin();
885 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
886 mapfile
, NULL
, "--whole-archive"))
888 ++Archive::total_members
;
892 input_objects
->archive_stop(this);
897 // Return the number of members in the archive. This is only used for
901 Archive::count_members()
904 for (Archive::const_iterator p
= this->begin();
911 // Include an archive member in the link. OFF is the file offset of
912 // the member header. WHY is the reason we are including this member.
913 // Return true if we added the member or if we had an error, return
914 // false if this was the first member we tried to add from this
915 // archive and it had an incompatible format.
918 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
919 Input_objects
* input_objects
, off_t off
,
920 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
922 ++Archive::total_members_loaded
;
924 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
925 if (p
!= this->members_
.end())
927 Object
* obj
= p
->second
.obj_
;
929 Read_symbols_data
* sd
= p
->second
.sd_
;
931 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
932 if (input_objects
->add_object(obj
))
934 obj
->layout(symtab
, layout
, sd
);
935 obj
->add_symbols(symtab
, sd
, layout
);
936 this->included_member_
= true;
942 // If this is the first object we are including from this archive,
943 // and we searched for this archive, most likely because it was
944 // found via a -l option, then if the target is incompatible we want
945 // to move on to the next archive found in the search path.
946 bool unconfigured
= false;
947 bool* punconfigured
= NULL
;
948 if (!this->included_member_
&& this->searched_for())
949 punconfigured
= &unconfigured
;
951 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
954 // Return false to search for another archive, true if we found
956 return unconfigured
? false : true;
960 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
962 Pluginobj
* pluginobj
= obj
->pluginobj();
963 if (pluginobj
!= NULL
)
965 pluginobj
->add_symbols(symtab
, NULL
, layout
);
966 this->included_member_
= true;
970 if (!input_objects
->add_object(obj
))
972 // If this is an external member of a thin archive, unlock the
974 if (obj
->offset() == 0)
975 obj
->unlock(this->task_
);
981 if (layout
->incremental_inputs() != NULL
)
982 layout
->incremental_inputs()->report_object(obj
, 0, this, NULL
);
983 Read_symbols_data sd
;
984 obj
->read_symbols(&sd
);
985 obj
->layout(symtab
, layout
, &sd
);
986 obj
->add_symbols(symtab
, &sd
, layout
);
989 // If this is an external member of a thin archive, unlock the file
990 // for the next task.
991 if (obj
->offset() == 0)
992 obj
->unlock(this->task_
);
994 this->included_member_
= true;
1000 // Iterate over all unused symbols, and call the visitor class V for each.
1003 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1005 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
1006 p
!= this->armap_
.end();
1009 if (this->seen_offsets_
.find(p
->file_offset
)
1010 == this->seen_offsets_
.end())
1011 v
->visit(this->armap_names_
.data() + p
->name_offset
);
1015 // Print statistical information to stderr. This is used for --stats.
1018 Archive::print_stats()
1020 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1021 program_name
, Archive::total_archives
);
1022 fprintf(stderr
, _("%s: total archive members: %u\n"),
1023 program_name
, Archive::total_members
);
1024 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1025 program_name
, Archive::total_members_loaded
);
1028 // Add_archive_symbols methods.
1030 Add_archive_symbols::~Add_archive_symbols()
1032 if (this->this_blocker_
!= NULL
)
1033 delete this->this_blocker_
;
1034 // next_blocker_ is deleted by the task associated with the next
1038 // Return whether we can add the archive symbols. We are blocked by
1039 // this_blocker_. We block next_blocker_. We also lock the file.
1042 Add_archive_symbols::is_runnable()
1044 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1045 return this->this_blocker_
;
1050 Add_archive_symbols::locks(Task_locker
* tl
)
1052 tl
->add(this, this->next_blocker_
);
1053 tl
->add(this, this->archive_
->token());
1057 Add_archive_symbols::run(Workqueue
* workqueue
)
1059 // For an incremental link, begin recording layout information.
1060 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1061 if (incremental_inputs
!= NULL
)
1063 unsigned int arg_serial
= this->input_argument_
->file().arg_serial();
1064 Script_info
* script_info
= this->input_argument_
->script_info();
1065 incremental_inputs
->report_archive_begin(this->archive_
, arg_serial
,
1069 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1070 this->input_objects_
,
1072 this->archive_
->unlock_nested_archives();
1074 this->archive_
->release();
1075 this->archive_
->clear_uncached_views();
1079 // This archive holds object files which are incompatible with
1081 Read_symbols::incompatible_warning(this->input_argument_
,
1082 this->archive_
->input_file());
1083 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1084 this->layout_
, this->dirpath_
, this->dirindex_
,
1085 this->mapfile_
, this->input_argument_
,
1086 this->input_group_
, this->next_blocker_
);
1087 delete this->archive_
;
1091 if (this->input_group_
!= NULL
)
1092 this->input_group_
->add_archive(this->archive_
);
1095 // For an incremental link, finish recording the layout information.
1096 if (incremental_inputs
!= NULL
)
1097 incremental_inputs
->report_archive_end(this->archive_
);
1099 if (!parameters
->options().has_plugins()
1100 || this->archive_
->input_file()->options().whole_archive())
1102 // We no longer need to know about this archive.
1103 delete this->archive_
;
1107 // The plugin interface may want to rescan this archive.
1108 parameters
->options().plugins()->save_archive(this->archive_
);
1111 this->archive_
= NULL
;
1115 // Class Lib_group static variables.
1116 unsigned int Lib_group::total_lib_groups
;
1117 unsigned int Lib_group::total_members
;
1118 unsigned int Lib_group::total_members_loaded
;
1120 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1121 : Library_base(task
), lib_(lib
), members_()
1123 this->members_
.resize(lib
->size());
1127 Lib_group::do_filename() const
1129 std::string
*filename
= new std::string("/group/");
1133 // Select members from the lib group and add them to the link. We walk
1134 // through the members, and check if each one up should be included.
1135 // If the object says it should be included, we do so. We have to do
1136 // this in a loop, since including one member may create new undefined
1137 // symbols which may be satisfied by other members.
1140 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1141 Input_objects
* input_objects
)
1143 ++Lib_group::total_lib_groups
;
1145 Lib_group::total_members
+= this->members_
.size();
1147 bool added_new_object
;
1150 added_new_object
= false;
1152 while (i
< this->members_
.size())
1154 const Archive_member
& member
= this->members_
[i
];
1155 Object
* obj
= member
.obj_
;
1158 // Skip files with no symbols. Plugin objects have
1159 // member.sd_ == NULL.
1161 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1163 Archive::Should_include t
= obj
->should_include_member(symtab
,
1168 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1174 this->include_member(symtab
, layout
, input_objects
, member
);
1176 added_new_object
= true;
1180 if (member
.sd_
!= NULL
)
1182 // The file must be locked in order to destroy the views
1183 // associated with it.
1184 gold_assert(obj
!= NULL
);
1185 obj
->lock(this->task_
);
1187 obj
->unlock(this->task_
);
1191 this->members_
[i
] = this->members_
.back();
1192 this->members_
.pop_back();
1195 while (added_new_object
);
1198 // Include a lib group member in the link.
1201 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1202 Input_objects
* input_objects
,
1203 const Archive_member
& member
)
1205 ++Lib_group::total_members_loaded
;
1207 Object
* obj
= member
.obj_
;
1208 gold_assert(obj
!= NULL
);
1210 Pluginobj
* pluginobj
= obj
->pluginobj();
1211 if (pluginobj
!= NULL
)
1213 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1217 Read_symbols_data
* sd
= member
.sd_
;
1218 gold_assert(sd
!= NULL
);
1219 obj
->lock(this->task_
);
1220 if (input_objects
->add_object(obj
))
1222 if (layout
->incremental_inputs() != NULL
)
1223 layout
->incremental_inputs()->report_object(obj
, member
.arg_serial_
,
1225 obj
->layout(symtab
, layout
, sd
);
1226 obj
->add_symbols(symtab
, sd
, layout
);
1229 // Unlock the file for the next task.
1230 obj
->unlock(this->task_
);
1233 // Iterate over all unused symbols, and call the visitor class V for each.
1236 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1238 // Files are removed from the members list when used, so all the
1239 // files remaining on the list are unused.
1240 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1241 p
!= this->members_
.end();
1244 Object
* obj
= p
->obj_
;
1245 obj
->for_all_global_symbols(p
->sd_
, v
);
1249 // Print statistical information to stderr. This is used for --stats.
1252 Lib_group::print_stats()
1254 fprintf(stderr
, _("%s: lib groups: %u\n"),
1255 program_name
, Lib_group::total_lib_groups
);
1256 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1257 program_name
, Lib_group::total_members
);
1258 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1259 program_name
, Lib_group::total_members_loaded
);
1263 Add_lib_group_symbols::is_runnable()
1265 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1266 return this->readsyms_blocker_
;
1267 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1268 return this->this_blocker_
;
1273 Add_lib_group_symbols::locks(Task_locker
* tl
)
1275 tl
->add(this, this->next_blocker_
);
1279 Add_lib_group_symbols::run(Workqueue
*)
1281 // For an incremental link, begin recording layout information.
1282 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1283 if (incremental_inputs
!= NULL
)
1284 incremental_inputs
->report_archive_begin(this->lib_
, 0, NULL
);
1286 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1288 if (incremental_inputs
!= NULL
)
1289 incremental_inputs
->report_archive_end(this->lib_
);
1292 Add_lib_group_symbols::~Add_lib_group_symbols()
1294 if (this->this_blocker_
!= NULL
)
1295 delete this->this_blocker_
;
1296 // next_blocker_ is deleted by the task associated with the next
1300 } // End namespace gold.