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 (layout
->script_options()->is_referenced(sym_name
))
109 size_t alc
= 100 + strlen(sym_name
);
110 char* buf
= new char[alc
];
111 snprintf(buf
, alc
, _("script or expression reference to %s"),
116 else if (strcmp(sym_name
, parameters
->entry()) == 0)
118 *why
= "entry symbol ";
122 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
124 else if (!sym
->is_undefined())
125 return Library_base::SHOULD_INCLUDE_NO
;
126 // PR 12001: Do not include an archive when the undefined
127 // symbol has actually been defined on the command line.
128 else if (layout
->script_options()->is_pending_assignment(sym_name
))
129 return Library_base::SHOULD_INCLUDE_NO
;
130 else if (sym
->binding() == elfcpp::STB_WEAK
)
131 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
133 return Library_base::SHOULD_INCLUDE_YES
;
136 // The header of an entry in the archive. This is all readable text,
137 // padded with spaces where necessary. If the contents of an archive
138 // are all text file, the entire archive is readable.
140 struct Archive::Archive_header
144 // The file modification time.
146 // The user's UID in decimal.
148 // The user's GID in decimal.
150 // The file mode in octal.
152 // The file size in decimal.
154 // The final magic code.
158 // Class Archive static variables.
159 unsigned int Archive::total_archives
;
160 unsigned int Archive::total_members
;
161 unsigned int Archive::total_members_loaded
;
165 const char Archive::armag
[sarmag
] =
167 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
170 const char Archive::armagt
[sarmag
] =
172 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
175 const char Archive::arfmag
[2] = { '`', '\n' };
177 Archive::Archive(const std::string
& name
, Input_file
* input_file
,
178 bool is_thin_archive
, Dirsearch
* dirpath
, Task
* task
)
179 : Library_base(task
), name_(name
), input_file_(input_file
), armap_(),
180 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
181 members_(), is_thin_archive_(is_thin_archive
), included_member_(false),
182 nested_archives_(), dirpath_(dirpath
), num_members_(0)
185 parameters
->options().check_excluded_libs(input_file
->found_name());
188 // Set up the archive: read the symbol map and the extended name
194 // We need to ignore empty archives.
195 if (this->input_file_
->file().filesize() == sarmag
)
198 // The first member of the archive should be the symbol table.
199 std::string armap_name
;
200 off_t header_size
= this->read_header(sarmag
, false, &armap_name
, NULL
);
201 if (header_size
== -1)
204 section_size_type armap_size
= convert_to_section_size_type(header_size
);
206 if (armap_name
.empty())
208 this->read_armap(sarmag
+ sizeof(Archive_header
), armap_size
);
209 off
= sarmag
+ sizeof(Archive_header
) + armap_size
;
211 else if (!this->input_file_
->options().whole_archive())
212 gold_error(_("%s: no archive symbol table (run ranlib)"),
213 this->name().c_str());
215 // See if there is an extended name table. We cache these views
216 // because it is likely that we will want to read the following
217 // header in the add_symbols routine.
221 header_size
= this->read_header(off
, true, &xname
, NULL
);
222 if (header_size
== -1)
225 section_size_type extended_size
= convert_to_section_size_type(header_size
);
228 const unsigned char* p
= this->get_view(off
+ sizeof(Archive_header
),
229 extended_size
, false, true);
230 const char* px
= reinterpret_cast<const char*>(p
);
231 this->extended_names_
.assign(px
, extended_size
);
233 bool preread_syms
= (parameters
->options().threads()
234 && parameters
->options().preread_archive_symbols());
235 #ifndef ENABLE_THREADS
236 preread_syms
= false;
238 if (parameters
->options().has_plugins())
239 preread_syms
= false;
242 this->read_all_symbols();
245 // Unlock any nested archives.
248 Archive::unlock_nested_archives()
250 for (Nested_archive_table::iterator p
= this->nested_archives_
.begin();
251 p
!= this->nested_archives_
.end();
254 p
->second
->unlock(this->task_
);
258 // Read the archive symbol map.
261 Archive::read_armap(off_t start
, section_size_type size
)
263 // To count the total number of archive members, we'll just count
264 // the number of times the file offset changes. Since most archives
265 // group the symbols in the armap by object, this ought to give us
266 // an accurate count.
267 off_t last_seen_offset
= -1;
269 // Read in the entire armap.
270 const unsigned char* p
= this->get_view(start
, size
, true, false);
272 // Numbers in the armap are always big-endian.
273 const elfcpp::Elf_Word
* pword
= reinterpret_cast<const elfcpp::Elf_Word
*>(p
);
274 unsigned int nsyms
= elfcpp::Swap
<32, true>::readval(pword
);
277 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
278 const char* pnames
= reinterpret_cast<const char*>(pword
+ nsyms
);
279 section_size_type names_size
=
280 reinterpret_cast<const char*>(p
) + size
- pnames
;
281 this->armap_names_
.assign(pnames
, names_size
);
283 this->armap_
.resize(nsyms
);
285 section_offset_type name_offset
= 0;
286 for (unsigned int i
= 0; i
< nsyms
; ++i
)
288 this->armap_
[i
].name_offset
= name_offset
;
289 this->armap_
[i
].file_offset
= elfcpp::Swap
<32, true>::readval(pword
);
290 name_offset
+= strlen(pnames
+ name_offset
) + 1;
292 if (this->armap_
[i
].file_offset
!= last_seen_offset
)
294 last_seen_offset
= this->armap_
[i
].file_offset
;
295 ++this->num_members_
;
299 if (static_cast<section_size_type
>(name_offset
) > names_size
)
300 gold_error(_("%s: bad archive symbol table names"),
301 this->name().c_str());
303 // This array keeps track of which symbols are for archive elements
304 // which we have already included in the link.
305 this->armap_checked_
.resize(nsyms
);
308 // Read the header of an archive member at OFF. Fail if something
309 // goes wrong. Return the size of the member. Set *PNAME to the name
313 Archive::read_header(off_t off
, bool cache
, std::string
* pname
,
316 const unsigned char* p
= this->get_view(off
, sizeof(Archive_header
), true,
318 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(p
);
319 return this->interpret_header(hdr
, off
, pname
, nested_off
);
322 // Interpret the header of HDR, the header of the archive member at
323 // file offset OFF. Return the size of the member, or -1 if something
324 // has gone wrong. Set *PNAME to the name of the member.
327 Archive::interpret_header(const Archive_header
* hdr
, off_t off
,
328 std::string
* pname
, off_t
* nested_off
) const
330 if (memcmp(hdr
->ar_fmag
, arfmag
, sizeof arfmag
) != 0)
332 gold_error(_("%s: malformed archive header at %zu"),
333 this->name().c_str(), static_cast<size_t>(off
));
337 const int size_string_size
= sizeof hdr
->ar_size
;
338 char size_string
[size_string_size
+ 1];
339 memcpy(size_string
, hdr
->ar_size
, size_string_size
);
340 char* ps
= size_string
+ size_string_size
;
341 while (ps
[-1] == ' ')
347 off_t member_size
= strtol(size_string
, &end
, 10);
350 || (member_size
== LONG_MAX
&& errno
== ERANGE
))
352 gold_error(_("%s: malformed archive header size at %zu"),
353 this->name().c_str(), static_cast<size_t>(off
));
357 if (hdr
->ar_name
[0] != '/')
359 const char* name_end
= strchr(hdr
->ar_name
, '/');
361 || name_end
- hdr
->ar_name
>= static_cast<int>(sizeof hdr
->ar_name
))
363 gold_error(_("%s: malformed archive header name at %zu"),
364 this->name().c_str(), static_cast<size_t>(off
));
367 pname
->assign(hdr
->ar_name
, name_end
- hdr
->ar_name
);
368 if (nested_off
!= NULL
)
371 else if (hdr
->ar_name
[1] == ' ')
373 // This is the symbol table.
377 else if (hdr
->ar_name
[1] == '/')
379 // This is the extended name table.
380 pname
->assign(1, '/');
385 long x
= strtol(hdr
->ar_name
+ 1, &end
, 10);
388 y
= strtol(end
+ 1, &end
, 10);
391 || (x
== LONG_MAX
&& errno
== ERANGE
)
392 || static_cast<size_t>(x
) >= this->extended_names_
.size())
394 gold_error(_("%s: bad extended name index at %zu"),
395 this->name().c_str(), static_cast<size_t>(off
));
399 const char* name
= this->extended_names_
.data() + x
;
400 const char* name_end
= strchr(name
, '\n');
401 if (static_cast<size_t>(name_end
- name
) > this->extended_names_
.size()
402 || name_end
[-1] != '/')
404 gold_error(_("%s: bad extended name entry at header %zu"),
405 this->name().c_str(), static_cast<size_t>(off
));
408 pname
->assign(name
, name_end
- 1 - name
);
409 if (nested_off
!= NULL
)
416 // An archive member iterator.
418 class Archive::const_iterator
421 // The header of an archive member. This is what this iterator
425 // The name of the member.
427 // The file offset of the member.
429 // The file offset of a nested archive member.
431 // The size of the member.
435 const_iterator(Archive
* archive
, off_t off
)
436 : archive_(archive
), off_(off
)
437 { this->read_next_header(); }
441 { return this->header_
; }
445 { return &this->header_
; }
450 if (this->off_
== this->archive_
->file().filesize())
452 this->off_
+= sizeof(Archive_header
);
453 if (!this->archive_
->is_thin_archive())
454 this->off_
+= this->header_
.size
;
455 if ((this->off_
& 1) != 0)
457 this->read_next_header();
464 const_iterator ret
= *this;
470 operator==(const const_iterator p
) const
471 { return this->off_
== p
->off
; }
474 operator!=(const const_iterator p
) const
475 { return this->off_
!= p
->off
; }
481 // The underlying archive.
483 // The current offset in the file.
485 // The current archive header.
489 // Read the next archive header.
492 Archive::const_iterator::read_next_header()
494 off_t filesize
= this->archive_
->file().filesize();
497 if (filesize
- this->off_
< static_cast<off_t
>(sizeof(Archive_header
)))
499 if (filesize
!= this->off_
)
501 gold_error(_("%s: short archive header at %zu"),
502 this->archive_
->filename().c_str(),
503 static_cast<size_t>(this->off_
));
504 this->off_
= filesize
;
506 this->header_
.off
= filesize
;
510 unsigned char buf
[sizeof(Archive_header
)];
511 this->archive_
->file().read(this->off_
, sizeof(Archive_header
), buf
);
513 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(buf
);
514 off_t size
= this->archive_
->interpret_header(hdr
, this->off_
,
516 &this->header_
.nested_off
);
519 this->header_
.off
= filesize
;
523 this->header_
.size
= size
;
524 this->header_
.off
= this->off_
;
526 // Skip special members.
527 if (!this->header_
.name
.empty() && this->header_
.name
!= "/")
530 this->off_
+= sizeof(Archive_header
) + this->header_
.size
;
531 if ((this->off_
& 1) != 0)
538 Archive::const_iterator
541 return Archive::const_iterator(this, sarmag
);
546 Archive::const_iterator
549 return Archive::const_iterator(this, this->input_file_
->file().filesize());
552 // Get the file and offset for an archive member, which may be an
553 // external member of a thin archive. Set *INPUT_FILE to the
554 // file containing the actual member, *MEMOFF to the offset
555 // within that file (0 if not a nested archive), and *MEMBER_NAME
556 // to the name of the archive member. Return TRUE on success.
559 Archive::get_file_and_offset(off_t off
, Input_file
** input_file
, off_t
* memoff
,
560 off_t
* memsize
, std::string
* member_name
)
564 *memsize
= this->read_header(off
, false, member_name
, &nested_off
);
568 *input_file
= this->input_file_
;
569 *memoff
= off
+ static_cast<off_t
>(sizeof(Archive_header
));
571 if (!this->is_thin_archive_
)
574 // Adjust a relative pathname so that it is relative
575 // to the directory containing the archive.
576 if (!IS_ABSOLUTE_PATH(member_name
->c_str()))
578 const char* arch_path
= this->filename().c_str();
579 const char* basename
= lbasename(arch_path
);
580 if (basename
> arch_path
)
581 member_name
->replace(0, 0,
582 this->filename().substr(0, basename
- arch_path
));
587 // This is a member of a nested archive. Open the containing
588 // archive if we don't already have it open, then do a recursive
589 // call to include the member from that archive.
591 Nested_archive_table::const_iterator p
=
592 this->nested_archives_
.find(*member_name
);
593 if (p
!= this->nested_archives_
.end())
597 Input_file_argument
* input_file_arg
=
598 new Input_file_argument(member_name
->c_str(),
599 Input_file_argument::INPUT_FILE_TYPE_FILE
,
600 "", false, parameters
->options());
601 *input_file
= new Input_file(input_file_arg
);
603 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
605 arch
= new Archive(*member_name
, *input_file
, false, this->dirpath_
,
608 std::pair
<Nested_archive_table::iterator
, bool> ins
=
609 this->nested_archives_
.insert(std::make_pair(*member_name
, arch
));
610 gold_assert(ins
.second
);
612 return arch
->get_file_and_offset(nested_off
, input_file
, memoff
,
613 memsize
, member_name
);
616 // This is an external member of a thin archive. Open the
617 // file as a regular relocatable object file.
618 Input_file_argument
* input_file_arg
=
619 new Input_file_argument(member_name
->c_str(),
620 Input_file_argument::INPUT_FILE_TYPE_FILE
,
621 "", false, this->input_file_
->options());
622 *input_file
= new Input_file(input_file_arg
);
624 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
628 *memsize
= (*input_file
)->file().filesize();
632 // Return an ELF object for the member at offset OFF. If
633 // PUNCONFIGURED is not NULL, then if the ELF object has an
634 // unsupported target type, set *PUNCONFIGURED to true and return
638 Archive::get_elf_object_for_member(off_t off
, bool* punconfigured
)
640 if (punconfigured
!= NULL
)
641 *punconfigured
= false;
643 Input_file
* input_file
;
646 std::string member_name
;
647 if (!this->get_file_and_offset(off
, &input_file
, &memoff
, &memsize
,
651 if (parameters
->options().has_plugins())
653 Object
* obj
= parameters
->options().plugins()->claim_file(input_file
,
658 // The input file was claimed by a plugin, and its symbols
659 // have been provided by the plugin.
664 const unsigned char* ehdr
;
666 if (!is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
668 gold_error(_("%s: member at %zu is not an ELF object"),
669 this->name().c_str(), static_cast<size_t>(off
));
673 Object
* obj
= make_elf_object((std::string(this->input_file_
->filename())
674 + "(" + member_name
+ ")"),
675 input_file
, memoff
, ehdr
, read_size
,
679 obj
->set_no_export(this->no_export());
683 // Read the symbols from all the archive members in the link.
686 Archive::read_all_symbols()
688 for (Archive::const_iterator p
= this->begin();
691 this->read_symbols(p
->off
);
694 // Read the symbols from an archive member in the link. OFF is the file
695 // offset of the member header.
698 Archive::read_symbols(off_t off
)
700 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
704 Read_symbols_data
* sd
= new Read_symbols_data
;
705 obj
->read_symbols(sd
);
706 Archive_member
member(obj
, sd
);
707 this->members_
[off
] = member
;
710 // Select members from the archive and add them to the link. We walk
711 // through the elements in the archive map, and look each one up in
712 // the symbol table. If it exists as a strong undefined symbol, we
713 // pull in the corresponding element. We have to do this in a loop,
714 // since pulling in one element may create new undefined symbols which
715 // may be satisfied by other objects in the archive. Return true in
716 // the normal case, false if the first member we tried to add from
717 // this archive had an incompatible target.
720 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
721 Input_objects
* input_objects
, Mapfile
* mapfile
)
723 ++Archive::total_archives
;
725 if (this->input_file_
->options().whole_archive())
726 return this->include_all_members(symtab
, layout
, input_objects
,
729 Archive::total_members
+= this->num_members_
;
731 input_objects
->archive_start(this);
733 const size_t armap_size
= this->armap_
.size();
735 // This is a quick optimization, since we usually see many symbols
736 // in a row with the same offset. last_seen_offset holds the last
737 // offset we saw that was present in the seen_offsets_ set.
738 off_t last_seen_offset
= -1;
740 // Track which symbols in the symbol table we've already found to be
744 size_t tmpbuflen
= 0;
745 bool added_new_object
;
748 added_new_object
= false;
749 for (size_t i
= 0; i
< armap_size
; ++i
)
751 if (this->armap_checked_
[i
])
753 if (this->armap_
[i
].file_offset
== last_seen_offset
)
755 this->armap_checked_
[i
] = true;
758 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
759 != this->seen_offsets_
.end())
761 this->armap_checked_
[i
] = true;
762 last_seen_offset
= this->armap_
[i
].file_offset
;
766 const char* sym_name
= (this->armap_names_
.data()
767 + this->armap_
[i
].name_offset
);
771 Archive::Should_include t
=
772 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
773 &why
, &tmpbuf
, &tmpbuflen
);
775 if (t
== Archive::SHOULD_INCLUDE_NO
776 || t
== Archive::SHOULD_INCLUDE_YES
)
777 this->armap_checked_
[i
] = true;
779 if (t
!= Archive::SHOULD_INCLUDE_YES
)
782 // We want to include this object in the link.
783 last_seen_offset
= this->armap_
[i
].file_offset
;
784 this->seen_offsets_
.insert(last_seen_offset
);
786 if (!this->include_member(symtab
, layout
, input_objects
,
787 last_seen_offset
, mapfile
, sym
,
795 added_new_object
= true;
798 while (added_new_object
);
803 input_objects
->archive_stop(this);
808 // Return whether the archive includes a member which defines the
812 Archive::defines_symbol(Symbol
* sym
) const
814 const char* symname
= sym
->name();
815 size_t symname_len
= strlen(symname
);
816 size_t armap_size
= this->armap_
.size();
817 for (size_t i
= 0; i
< armap_size
; ++i
)
819 if (this->armap_checked_
[i
])
821 const char* archive_symname
= (this->armap_names_
.data()
822 + this->armap_
[i
].name_offset
);
823 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
825 char c
= archive_symname
[symname_len
];
826 if (c
== '\0' && sym
->version() == NULL
)
830 const char* ver
= archive_symname
+ symname_len
+ 1;
833 if (sym
->version() == NULL
)
837 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
844 // Include all the archive members in the link. This is for --whole-archive.
847 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
848 Input_objects
* input_objects
, Mapfile
* mapfile
)
850 input_objects
->archive_start(this);
852 if (this->members_
.size() > 0)
854 std::map
<off_t
, Archive_member
>::const_iterator p
;
855 for (p
= this->members_
.begin();
856 p
!= this->members_
.end();
859 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
860 mapfile
, NULL
, "--whole-archive"))
862 ++Archive::total_members
;
867 for (Archive::const_iterator p
= this->begin();
871 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
872 mapfile
, NULL
, "--whole-archive"))
874 ++Archive::total_members
;
878 input_objects
->archive_stop(this);
883 // Return the number of members in the archive. This is only used for
887 Archive::count_members()
890 for (Archive::const_iterator p
= this->begin();
897 // Include an archive member in the link. OFF is the file offset of
898 // the member header. WHY is the reason we are including this member.
899 // Return true if we added the member or if we had an error, return
900 // false if this was the first member we tried to add from this
901 // archive and it had an incompatible format.
904 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
905 Input_objects
* input_objects
, off_t off
,
906 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
908 ++Archive::total_members_loaded
;
910 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
911 if (p
!= this->members_
.end())
913 Object
* obj
= p
->second
.obj_
;
915 Read_symbols_data
* sd
= p
->second
.sd_
;
917 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
918 if (input_objects
->add_object(obj
))
920 obj
->layout(symtab
, layout
, sd
);
921 obj
->add_symbols(symtab
, sd
, layout
);
922 this->included_member_
= true;
928 // If this is the first object we are including from this archive,
929 // and we searched for this archive, most likely because it was
930 // found via a -l option, then if the target is incompatible we want
931 // to move on to the next archive found in the search path.
932 bool unconfigured
= false;
933 bool* punconfigured
= NULL
;
934 if (!this->included_member_
&& this->searched_for())
935 punconfigured
= &unconfigured
;
937 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
940 // Return false to search for another archive, true if we found
942 return unconfigured
? false : true;
946 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
948 Pluginobj
* pluginobj
= obj
->pluginobj();
949 if (pluginobj
!= NULL
)
951 pluginobj
->add_symbols(symtab
, NULL
, layout
);
952 this->included_member_
= true;
956 if (!input_objects
->add_object(obj
))
958 // If this is an external member of a thin archive, unlock the
960 if (obj
->offset() == 0)
961 obj
->unlock(this->task_
);
967 if (layout
->incremental_inputs() != NULL
)
968 layout
->incremental_inputs()->report_object(obj
, 0, this, NULL
);
969 Read_symbols_data sd
;
970 obj
->read_symbols(&sd
);
971 obj
->layout(symtab
, layout
, &sd
);
972 obj
->add_symbols(symtab
, &sd
, layout
);
975 // If this is an external member of a thin archive, unlock the file
976 // for the next task.
977 if (obj
->offset() == 0)
978 obj
->unlock(this->task_
);
980 this->included_member_
= true;
986 // Iterate over all unused symbols, and call the visitor class V for each.
989 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
991 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
992 p
!= this->armap_
.end();
995 if (this->seen_offsets_
.find(p
->file_offset
)
996 == this->seen_offsets_
.end())
997 v
->visit(this->armap_names_
.data() + p
->name_offset
);
1001 // Print statistical information to stderr. This is used for --stats.
1004 Archive::print_stats()
1006 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1007 program_name
, Archive::total_archives
);
1008 fprintf(stderr
, _("%s: total archive members: %u\n"),
1009 program_name
, Archive::total_members
);
1010 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1011 program_name
, Archive::total_members_loaded
);
1014 // Add_archive_symbols methods.
1016 Add_archive_symbols::~Add_archive_symbols()
1018 if (this->this_blocker_
!= NULL
)
1019 delete this->this_blocker_
;
1020 // next_blocker_ is deleted by the task associated with the next
1024 // Return whether we can add the archive symbols. We are blocked by
1025 // this_blocker_. We block next_blocker_. We also lock the file.
1028 Add_archive_symbols::is_runnable()
1030 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1031 return this->this_blocker_
;
1036 Add_archive_symbols::locks(Task_locker
* tl
)
1038 tl
->add(this, this->next_blocker_
);
1039 tl
->add(this, this->archive_
->token());
1043 Add_archive_symbols::run(Workqueue
* workqueue
)
1045 // For an incremental link, begin recording layout information.
1046 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1047 if (incremental_inputs
!= NULL
)
1049 unsigned int arg_serial
= this->input_argument_
->file().arg_serial();
1050 Script_info
* script_info
= this->input_argument_
->script_info();
1051 incremental_inputs
->report_archive_begin(this->archive_
, arg_serial
,
1055 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1056 this->input_objects_
,
1058 this->archive_
->unlock_nested_archives();
1060 this->archive_
->release();
1061 this->archive_
->clear_uncached_views();
1065 // This archive holds object files which are incompatible with
1067 Read_symbols::incompatible_warning(this->input_argument_
,
1068 this->archive_
->input_file());
1069 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1070 this->layout_
, this->dirpath_
, this->dirindex_
,
1071 this->mapfile_
, this->input_argument_
,
1072 this->input_group_
, this->next_blocker_
);
1073 delete this->archive_
;
1077 if (this->input_group_
!= NULL
)
1078 this->input_group_
->add_archive(this->archive_
);
1081 // For an incremental link, finish recording the layout information.
1082 if (incremental_inputs
!= NULL
)
1083 incremental_inputs
->report_archive_end(this->archive_
);
1085 if (!parameters
->options().has_plugins()
1086 || this->archive_
->input_file()->options().whole_archive())
1088 // We no longer need to know about this archive.
1089 delete this->archive_
;
1093 // The plugin interface may want to rescan this archive.
1094 parameters
->options().plugins()->save_archive(this->archive_
);
1097 this->archive_
= NULL
;
1101 // Class Lib_group static variables.
1102 unsigned int Lib_group::total_lib_groups
;
1103 unsigned int Lib_group::total_members
;
1104 unsigned int Lib_group::total_members_loaded
;
1106 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1107 : Library_base(task
), lib_(lib
), members_()
1109 this->members_
.resize(lib
->size());
1113 Lib_group::do_filename() const
1115 std::string
*filename
= new std::string("/group/");
1119 // Select members from the lib group and add them to the link. We walk
1120 // through the members, and check if each one up should be included.
1121 // If the object says it should be included, we do so. We have to do
1122 // this in a loop, since including one member may create new undefined
1123 // symbols which may be satisfied by other members.
1126 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1127 Input_objects
* input_objects
)
1129 ++Lib_group::total_lib_groups
;
1131 Lib_group::total_members
+= this->members_
.size();
1133 bool added_new_object
;
1136 added_new_object
= false;
1138 while (i
< this->members_
.size())
1140 const Archive_member
& member
= this->members_
[i
];
1141 Object
* obj
= member
.obj_
;
1144 // Skip files with no symbols. Plugin objects have
1145 // member.sd_ == NULL.
1147 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1149 Archive::Should_include t
= obj
->should_include_member(symtab
,
1154 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1160 this->include_member(symtab
, layout
, input_objects
, member
);
1162 added_new_object
= true;
1166 if (member
.sd_
!= NULL
)
1168 // The file must be locked in order to destroy the views
1169 // associated with it.
1170 gold_assert(obj
!= NULL
);
1171 obj
->lock(this->task_
);
1173 obj
->unlock(this->task_
);
1177 this->members_
[i
] = this->members_
.back();
1178 this->members_
.pop_back();
1181 while (added_new_object
);
1184 // Include a lib group member in the link.
1187 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1188 Input_objects
* input_objects
,
1189 const Archive_member
& member
)
1191 ++Lib_group::total_members_loaded
;
1193 Object
* obj
= member
.obj_
;
1194 gold_assert(obj
!= NULL
);
1196 Pluginobj
* pluginobj
= obj
->pluginobj();
1197 if (pluginobj
!= NULL
)
1199 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1203 Read_symbols_data
* sd
= member
.sd_
;
1204 gold_assert(sd
!= NULL
);
1205 obj
->lock(this->task_
);
1206 if (input_objects
->add_object(obj
))
1208 if (layout
->incremental_inputs() != NULL
)
1209 layout
->incremental_inputs()->report_object(obj
, member
.arg_serial_
,
1211 obj
->layout(symtab
, layout
, sd
);
1212 obj
->add_symbols(symtab
, sd
, layout
);
1215 // Unlock the file for the next task.
1216 obj
->unlock(this->task_
);
1219 // Iterate over all unused symbols, and call the visitor class V for each.
1222 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1224 // Files are removed from the members list when used, so all the
1225 // files remaining on the list are unused.
1226 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1227 p
!= this->members_
.end();
1230 Object
* obj
= p
->obj_
;
1231 obj
->for_all_global_symbols(p
->sd_
, v
);
1235 // Print statistical information to stderr. This is used for --stats.
1238 Lib_group::print_stats()
1240 fprintf(stderr
, _("%s: lib groups: %u\n"),
1241 program_name
, Lib_group::total_lib_groups
);
1242 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1243 program_name
, Lib_group::total_members
);
1244 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1245 program_name
, Lib_group::total_members_loaded
);
1249 Add_lib_group_symbols::is_runnable()
1251 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1252 return this->readsyms_blocker_
;
1253 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1254 return this->this_blocker_
;
1259 Add_lib_group_symbols::locks(Task_locker
* tl
)
1261 tl
->add(this, this->next_blocker_
);
1265 Add_lib_group_symbols::run(Workqueue
*)
1267 // For an incremental link, begin recording layout information.
1268 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1269 if (incremental_inputs
!= NULL
)
1270 incremental_inputs
->report_archive_begin(this->lib_
, 0, NULL
);
1272 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1274 if (incremental_inputs
!= NULL
)
1275 incremental_inputs
->report_archive_end(this->lib_
);
1278 Add_lib_group_symbols::~Add_lib_group_symbols()
1280 if (this->this_blocker_
!= NULL
)
1281 delete this->this_blocker_
;
1282 // next_blocker_ is deleted by the task associated with the next
1286 } // End namespace gold.