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.