1 // archive.cc -- archive support for gold
3 // Copyright (C) 2006-2014 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 if (!sym
->is_undefined())
102 return Library_base::SHOULD_INCLUDE_NO
;
104 // PR 12001: Do not include an archive when the undefined
105 // symbol has actually been defined on the command line.
106 if (layout
->script_options()->is_pending_assignment(sym_name
))
107 return Library_base::SHOULD_INCLUDE_NO
;
109 // If the symbol is weak undefined, we still need to check
110 // for other reasons (like a -u option).
111 if (sym
->binding() != elfcpp::STB_WEAK
)
112 return Library_base::SHOULD_INCLUDE_YES
;
115 // Check whether the symbol was named in a -u option.
116 if (parameters
->options().is_undefined(sym_name
))
120 return Library_base::SHOULD_INCLUDE_YES
;
123 if (parameters
->options().is_export_dynamic_symbol(sym_name
))
125 *why
= "--export-dynamic-symbol ";
127 return Library_base::SHOULD_INCLUDE_YES
;
130 if (layout
->script_options()->is_referenced(sym_name
))
132 size_t alc
= 100 + strlen(sym_name
);
133 char* buf
= new char[alc
];
134 snprintf(buf
, alc
, _("script or expression reference to %s"),
138 return Library_base::SHOULD_INCLUDE_YES
;
141 if (strcmp(sym_name
, parameters
->entry()) == 0)
143 *why
= "entry symbol ";
145 return Library_base::SHOULD_INCLUDE_YES
;
148 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
151 // The header of an entry in the archive. This is all readable text,
152 // padded with spaces where necessary. If the contents of an archive
153 // are all text file, the entire archive is readable.
155 struct Archive::Archive_header
159 // The file modification time.
161 // The user's UID in decimal.
163 // The user's GID in decimal.
165 // The file mode in octal.
167 // The file size in decimal.
169 // The final magic code.
173 // Class Archive static variables.
174 unsigned int Archive::total_archives
;
175 unsigned int Archive::total_members
;
176 unsigned int Archive::total_members_loaded
;
180 const char Archive::armag
[sarmag
] =
182 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
185 const char Archive::armagt
[sarmag
] =
187 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
190 const char Archive::arfmag
[2] = { '`', '\n' };
192 Archive::Archive(const std::string
& name
, Input_file
* input_file
,
193 bool is_thin_archive
, Dirsearch
* dirpath
, Task
* task
)
194 : Library_base(task
), name_(name
), input_file_(input_file
), armap_(),
195 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
196 members_(), is_thin_archive_(is_thin_archive
), included_member_(false),
197 nested_archives_(), dirpath_(dirpath
), num_members_(0),
198 included_all_members_(false)
201 parameters
->options().check_excluded_libs(input_file
->found_name());
204 // Set up the archive: read the symbol map and the extended name
210 // We need to ignore empty archives.
211 if (this->input_file_
->file().filesize() == sarmag
)
214 // The first member of the archive should be the symbol table.
215 std::string armap_name
;
216 off_t header_size
= this->read_header(sarmag
, false, &armap_name
, NULL
);
217 if (header_size
== -1)
220 section_size_type armap_size
= convert_to_section_size_type(header_size
);
222 if (armap_name
.empty())
224 this->read_armap(sarmag
+ sizeof(Archive_header
), armap_size
);
225 off
= sarmag
+ sizeof(Archive_header
) + armap_size
;
227 else if (!this->input_file_
->options().whole_archive())
228 gold_error(_("%s: no archive symbol table (run ranlib)"),
229 this->name().c_str());
231 // See if there is an extended name table. We cache these views
232 // because it is likely that we will want to read the following
233 // header in the add_symbols routine.
237 header_size
= this->read_header(off
, true, &xname
, NULL
);
238 if (header_size
== -1)
241 section_size_type extended_size
= convert_to_section_size_type(header_size
);
244 const unsigned char* p
= this->get_view(off
+ sizeof(Archive_header
),
245 extended_size
, false, true);
246 const char* px
= reinterpret_cast<const char*>(p
);
247 this->extended_names_
.assign(px
, extended_size
);
249 bool preread_syms
= (parameters
->options().threads()
250 && parameters
->options().preread_archive_symbols());
251 #ifndef ENABLE_THREADS
252 preread_syms
= false;
254 if (parameters
->options().has_plugins())
255 preread_syms
= false;
258 this->read_all_symbols();
261 // Unlock any nested archives.
264 Archive::unlock_nested_archives()
266 for (Nested_archive_table::iterator p
= this->nested_archives_
.begin();
267 p
!= this->nested_archives_
.end();
270 p
->second
->unlock(this->task_
);
274 // Read the archive symbol map.
277 Archive::read_armap(off_t start
, section_size_type size
)
279 // To count the total number of archive members, we'll just count
280 // the number of times the file offset changes. Since most archives
281 // group the symbols in the armap by object, this ought to give us
282 // an accurate count.
283 off_t last_seen_offset
= -1;
285 // Read in the entire armap.
286 const unsigned char* p
= this->get_view(start
, size
, true, false);
288 // Numbers in the armap are always big-endian.
289 const elfcpp::Elf_Word
* pword
= reinterpret_cast<const elfcpp::Elf_Word
*>(p
);
290 unsigned int nsyms
= elfcpp::Swap
<32, true>::readval(pword
);
293 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
294 const char* pnames
= reinterpret_cast<const char*>(pword
+ nsyms
);
295 section_size_type names_size
=
296 reinterpret_cast<const char*>(p
) + size
- pnames
;
297 this->armap_names_
.assign(pnames
, names_size
);
299 this->armap_
.resize(nsyms
);
301 section_offset_type name_offset
= 0;
302 for (unsigned int i
= 0; i
< nsyms
; ++i
)
304 this->armap_
[i
].name_offset
= name_offset
;
305 this->armap_
[i
].file_offset
= elfcpp::Swap
<32, true>::readval(pword
);
306 name_offset
+= strlen(pnames
+ name_offset
) + 1;
308 if (this->armap_
[i
].file_offset
!= last_seen_offset
)
310 last_seen_offset
= this->armap_
[i
].file_offset
;
311 ++this->num_members_
;
315 if (static_cast<section_size_type
>(name_offset
) > names_size
)
316 gold_error(_("%s: bad archive symbol table names"),
317 this->name().c_str());
319 // This array keeps track of which symbols are for archive elements
320 // which we have already included in the link.
321 this->armap_checked_
.resize(nsyms
);
324 // Read the header of an archive member at OFF. Fail if something
325 // goes wrong. Return the size of the member. Set *PNAME to the name
329 Archive::read_header(off_t off
, bool cache
, std::string
* pname
,
332 const unsigned char* p
= this->get_view(off
, sizeof(Archive_header
), true,
334 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(p
);
335 return this->interpret_header(hdr
, off
, pname
, nested_off
);
338 // Interpret the header of HDR, the header of the archive member at
339 // file offset OFF. Return the size of the member, or -1 if something
340 // has gone wrong. Set *PNAME to the name of the member.
343 Archive::interpret_header(const Archive_header
* hdr
, off_t off
,
344 std::string
* pname
, off_t
* nested_off
) const
346 if (memcmp(hdr
->ar_fmag
, arfmag
, sizeof arfmag
) != 0)
348 gold_error(_("%s: malformed archive header at %zu"),
349 this->name().c_str(), static_cast<size_t>(off
));
353 const int size_string_size
= sizeof hdr
->ar_size
;
354 char size_string
[size_string_size
+ 1];
355 memcpy(size_string
, hdr
->ar_size
, size_string_size
);
356 char* ps
= size_string
+ size_string_size
;
357 while (ps
[-1] == ' ')
363 off_t member_size
= strtol(size_string
, &end
, 10);
366 || (member_size
== LONG_MAX
&& errno
== ERANGE
))
368 gold_error(_("%s: malformed archive header size at %zu"),
369 this->name().c_str(), static_cast<size_t>(off
));
373 if (hdr
->ar_name
[0] != '/')
375 const char* name_end
= strchr(hdr
->ar_name
, '/');
377 || name_end
- hdr
->ar_name
>= static_cast<int>(sizeof hdr
->ar_name
))
379 gold_error(_("%s: malformed archive header name at %zu"),
380 this->name().c_str(), static_cast<size_t>(off
));
383 pname
->assign(hdr
->ar_name
, name_end
- hdr
->ar_name
);
384 if (nested_off
!= NULL
)
387 else if (hdr
->ar_name
[1] == ' ')
389 // This is the symbol table.
393 else if (hdr
->ar_name
[1] == '/')
395 // This is the extended name table.
396 pname
->assign(1, '/');
401 long x
= strtol(hdr
->ar_name
+ 1, &end
, 10);
404 y
= strtol(end
+ 1, &end
, 10);
407 || (x
== LONG_MAX
&& errno
== ERANGE
)
408 || static_cast<size_t>(x
) >= this->extended_names_
.size())
410 gold_error(_("%s: bad extended name index at %zu"),
411 this->name().c_str(), static_cast<size_t>(off
));
415 const char* name
= this->extended_names_
.data() + x
;
416 const char* name_end
= strchr(name
, '\n');
417 if (static_cast<size_t>(name_end
- name
) > this->extended_names_
.size()
418 || name_end
[-1] != '/')
420 gold_error(_("%s: bad extended name entry at header %zu"),
421 this->name().c_str(), static_cast<size_t>(off
));
424 pname
->assign(name
, name_end
- 1 - name
);
425 if (nested_off
!= NULL
)
432 // An archive member iterator.
434 class Archive::const_iterator
437 // The header of an archive member. This is what this iterator
441 // The name of the member.
443 // The file offset of the member.
445 // The file offset of a nested archive member.
447 // The size of the member.
451 const_iterator(Archive
* archive
, off_t off
)
452 : archive_(archive
), off_(off
)
453 { this->read_next_header(); }
457 { return this->header_
; }
461 { return &this->header_
; }
466 if (this->off_
== this->archive_
->file().filesize())
468 this->off_
+= sizeof(Archive_header
);
469 if (!this->archive_
->is_thin_archive())
470 this->off_
+= this->header_
.size
;
471 if ((this->off_
& 1) != 0)
473 this->read_next_header();
480 const_iterator ret
= *this;
486 operator==(const const_iterator p
) const
487 { return this->off_
== p
->off
; }
490 operator!=(const const_iterator p
) const
491 { return this->off_
!= p
->off
; }
497 // The underlying archive.
499 // The current offset in the file.
501 // The current archive header.
505 // Read the next archive header.
508 Archive::const_iterator::read_next_header()
510 off_t filesize
= this->archive_
->file().filesize();
513 if (filesize
- this->off_
< static_cast<off_t
>(sizeof(Archive_header
)))
515 if (filesize
!= this->off_
)
517 gold_error(_("%s: short archive header at %zu"),
518 this->archive_
->filename().c_str(),
519 static_cast<size_t>(this->off_
));
520 this->off_
= filesize
;
522 this->header_
.off
= filesize
;
526 unsigned char buf
[sizeof(Archive_header
)];
527 this->archive_
->file().read(this->off_
, sizeof(Archive_header
), buf
);
529 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(buf
);
530 off_t size
= this->archive_
->interpret_header(hdr
, this->off_
,
532 &this->header_
.nested_off
);
535 this->header_
.off
= filesize
;
539 this->header_
.size
= size
;
540 this->header_
.off
= this->off_
;
542 // Skip special members.
543 if (!this->header_
.name
.empty() && this->header_
.name
!= "/")
546 this->off_
+= sizeof(Archive_header
) + this->header_
.size
;
547 if ((this->off_
& 1) != 0)
554 Archive::const_iterator
557 return Archive::const_iterator(this, sarmag
);
562 Archive::const_iterator
565 return Archive::const_iterator(this, this->input_file_
->file().filesize());
568 // Get the file and offset for an archive member, which may be an
569 // external member of a thin archive. Set *INPUT_FILE to the
570 // file containing the actual member, *MEMOFF to the offset
571 // within that file (0 if not a nested archive), and *MEMBER_NAME
572 // to the name of the archive member. Return TRUE on success.
575 Archive::get_file_and_offset(off_t off
, Input_file
** input_file
, off_t
* memoff
,
576 off_t
* memsize
, std::string
* member_name
)
580 *memsize
= this->read_header(off
, false, member_name
, &nested_off
);
584 *input_file
= this->input_file_
;
585 *memoff
= off
+ static_cast<off_t
>(sizeof(Archive_header
));
587 if (!this->is_thin_archive_
)
590 // Adjust a relative pathname so that it is relative
591 // to the directory containing the archive.
592 if (!IS_ABSOLUTE_PATH(member_name
->c_str()))
594 const char* arch_path
= this->filename().c_str();
595 const char* basename
= lbasename(arch_path
);
596 if (basename
> arch_path
)
597 member_name
->replace(0, 0,
598 this->filename().substr(0, basename
- arch_path
));
603 // This is a member of a nested archive. Open the containing
604 // archive if we don't already have it open, then do a recursive
605 // call to include the member from that archive.
607 Nested_archive_table::const_iterator p
=
608 this->nested_archives_
.find(*member_name
);
609 if (p
!= this->nested_archives_
.end())
613 Input_file_argument
* input_file_arg
=
614 new Input_file_argument(member_name
->c_str(),
615 Input_file_argument::INPUT_FILE_TYPE_FILE
,
616 "", false, parameters
->options());
617 *input_file
= new Input_file(input_file_arg
);
619 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
621 arch
= new Archive(*member_name
, *input_file
, false, this->dirpath_
,
624 std::pair
<Nested_archive_table::iterator
, bool> ins
=
625 this->nested_archives_
.insert(std::make_pair(*member_name
, arch
));
626 gold_assert(ins
.second
);
628 return arch
->get_file_and_offset(nested_off
, input_file
, memoff
,
629 memsize
, member_name
);
632 // This is an external member of a thin archive. Open the
633 // file as a regular relocatable object file.
634 Input_file_argument
* input_file_arg
=
635 new Input_file_argument(member_name
->c_str(),
636 Input_file_argument::INPUT_FILE_TYPE_FILE
,
637 "", false, this->input_file_
->options());
638 *input_file
= new Input_file(input_file_arg
);
640 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
644 *memsize
= (*input_file
)->file().filesize();
648 // Return an ELF object for the member at offset OFF. If
649 // PUNCONFIGURED is not NULL, then if the ELF object has an
650 // unsupported target type, set *PUNCONFIGURED to true and return
654 Archive::get_elf_object_for_member(off_t off
, bool* punconfigured
)
656 if (punconfigured
!= NULL
)
657 *punconfigured
= false;
659 Input_file
* input_file
;
662 std::string member_name
;
663 if (!this->get_file_and_offset(off
, &input_file
, &memoff
, &memsize
,
667 const unsigned char* ehdr
;
670 bool is_elf_obj
= false;
672 if (is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
674 obj
= make_elf_object((std::string(this->input_file_
->filename())
675 + "(" + member_name
+ ")"),
676 input_file
, memoff
, ehdr
, read_size
,
681 if (parameters
->options().has_plugins())
684 = parameters
->options().plugins()->claim_file(input_file
,
688 if (plugin_obj
!= NULL
)
690 // The input file was claimed by a plugin, and its symbols
691 // have been provided by the plugin.
692 // Delete its elf object.
701 gold_error(_("%s: member at %zu is not an ELF object"),
702 this->name().c_str(), static_cast<size_t>(off
));
708 obj
->set_no_export(this->no_export());
712 // Read the symbols from all the archive members in the link.
715 Archive::read_all_symbols()
717 for (Archive::const_iterator p
= this->begin();
720 this->read_symbols(p
->off
);
723 // Read the symbols from an archive member in the link. OFF is the file
724 // offset of the member header.
727 Archive::read_symbols(off_t off
)
729 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
733 Read_symbols_data
* sd
= new Read_symbols_data
;
734 obj
->read_symbols(sd
);
735 Archive_member
member(obj
, sd
);
736 this->members_
[off
] = member
;
739 // Select members from the archive and add them to the link. We walk
740 // through the elements in the archive map, and look each one up in
741 // the symbol table. If it exists as a strong undefined symbol, we
742 // pull in the corresponding element. We have to do this in a loop,
743 // since pulling in one element may create new undefined symbols which
744 // may be satisfied by other objects in the archive. Return true in
745 // the normal case, false if the first member we tried to add from
746 // this archive had an incompatible target.
749 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
750 Input_objects
* input_objects
, Mapfile
* mapfile
)
752 ++Archive::total_archives
;
754 if (this->input_file_
->options().whole_archive())
755 return this->include_all_members(symtab
, layout
, input_objects
,
758 Archive::total_members
+= this->num_members_
;
760 input_objects
->archive_start(this);
762 const size_t armap_size
= this->armap_
.size();
764 // This is a quick optimization, since we usually see many symbols
765 // in a row with the same offset. last_seen_offset holds the last
766 // offset we saw that was present in the seen_offsets_ set.
767 off_t last_seen_offset
= -1;
769 // Track which symbols in the symbol table we've already found to be
773 size_t tmpbuflen
= 0;
774 bool added_new_object
;
777 added_new_object
= false;
778 for (size_t i
= 0; i
< armap_size
; ++i
)
780 if (this->armap_checked_
[i
])
782 if (this->armap_
[i
].file_offset
== last_seen_offset
)
784 this->armap_checked_
[i
] = true;
787 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
788 != this->seen_offsets_
.end())
790 this->armap_checked_
[i
] = true;
791 last_seen_offset
= this->armap_
[i
].file_offset
;
795 const char* sym_name
= (this->armap_names_
.data()
796 + this->armap_
[i
].name_offset
);
800 Archive::Should_include t
=
801 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
802 &why
, &tmpbuf
, &tmpbuflen
);
804 if (t
== Archive::SHOULD_INCLUDE_NO
805 || t
== Archive::SHOULD_INCLUDE_YES
)
806 this->armap_checked_
[i
] = true;
808 if (t
!= Archive::SHOULD_INCLUDE_YES
)
811 // We want to include this object in the link.
812 last_seen_offset
= this->armap_
[i
].file_offset
;
813 this->seen_offsets_
.insert(last_seen_offset
);
815 if (!this->include_member(symtab
, layout
, input_objects
,
816 last_seen_offset
, mapfile
, sym
,
824 added_new_object
= true;
827 while (added_new_object
);
832 input_objects
->archive_stop(this);
837 // Return whether the archive includes a member which defines the
841 Archive::defines_symbol(Symbol
* sym
) const
843 const char* symname
= sym
->name();
844 size_t symname_len
= strlen(symname
);
845 size_t armap_size
= this->armap_
.size();
846 for (size_t i
= 0; i
< armap_size
; ++i
)
848 if (this->armap_checked_
[i
])
850 const char* archive_symname
= (this->armap_names_
.data()
851 + this->armap_
[i
].name_offset
);
852 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
854 char c
= archive_symname
[symname_len
];
855 if (c
== '\0' && sym
->version() == NULL
)
859 const char* ver
= archive_symname
+ symname_len
+ 1;
862 if (sym
->version() == NULL
)
866 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
873 // Include all the archive members in the link. This is for --whole-archive.
876 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
877 Input_objects
* input_objects
, Mapfile
* mapfile
)
879 // Don't include the same archive twice. This can happen if
880 // --whole-archive is nested inside --start-group (PR gold/12163).
881 if (this->included_all_members_
)
884 this->included_all_members_
= true;
886 input_objects
->archive_start(this);
888 if (this->members_
.size() > 0)
890 std::map
<off_t
, Archive_member
>::const_iterator p
;
891 for (p
= this->members_
.begin();
892 p
!= this->members_
.end();
895 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
896 mapfile
, NULL
, "--whole-archive"))
898 ++Archive::total_members
;
903 for (Archive::const_iterator p
= this->begin();
907 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
908 mapfile
, NULL
, "--whole-archive"))
910 ++Archive::total_members
;
914 input_objects
->archive_stop(this);
919 // Return the number of members in the archive. This is only used for
923 Archive::count_members()
926 for (Archive::const_iterator p
= this->begin();
933 // Include an archive member in the link. OFF is the file offset of
934 // the member header. WHY is the reason we are including this member.
935 // Return true if we added the member or if we had an error, return
936 // false if this was the first member we tried to add from this
937 // archive and it had an incompatible format.
940 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
941 Input_objects
* input_objects
, off_t off
,
942 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
944 ++Archive::total_members_loaded
;
946 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
947 if (p
!= this->members_
.end())
949 Object
* obj
= p
->second
.obj_
;
951 Read_symbols_data
* sd
= p
->second
.sd_
;
953 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
954 if (input_objects
->add_object(obj
))
956 obj
->layout(symtab
, layout
, sd
);
957 obj
->add_symbols(symtab
, sd
, layout
);
958 this->included_member_
= true;
964 // If this is the first object we are including from this archive,
965 // and we searched for this archive, most likely because it was
966 // found via a -l option, then if the target is incompatible we want
967 // to move on to the next archive found in the search path.
968 bool unconfigured
= false;
969 bool* punconfigured
= NULL
;
970 if (!this->included_member_
&& this->searched_for())
971 punconfigured
= &unconfigured
;
973 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
976 // Return false to search for another archive, true if we found
978 return unconfigured
? false : true;
982 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
984 Pluginobj
* pluginobj
= obj
->pluginobj();
985 if (pluginobj
!= NULL
)
987 pluginobj
->add_symbols(symtab
, NULL
, layout
);
988 this->included_member_
= true;
992 if (!input_objects
->add_object(obj
))
994 // If this is an external member of a thin archive, unlock the
996 if (obj
->offset() == 0)
997 obj
->unlock(this->task_
);
1003 if (layout
->incremental_inputs() != NULL
)
1004 layout
->incremental_inputs()->report_object(obj
, 0, this, NULL
);
1005 Read_symbols_data sd
;
1006 obj
->read_symbols(&sd
);
1007 obj
->layout(symtab
, layout
, &sd
);
1008 obj
->add_symbols(symtab
, &sd
, layout
);
1011 // If this is an external member of a thin archive, unlock the file
1012 // for the next task.
1013 if (obj
->offset() == 0)
1014 obj
->unlock(this->task_
);
1016 this->included_member_
= true;
1022 // Iterate over all unused symbols, and call the visitor class V for each.
1025 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1027 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
1028 p
!= this->armap_
.end();
1031 if (this->seen_offsets_
.find(p
->file_offset
)
1032 == this->seen_offsets_
.end())
1033 v
->visit(this->armap_names_
.data() + p
->name_offset
);
1037 // Print statistical information to stderr. This is used for --stats.
1040 Archive::print_stats()
1042 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1043 program_name
, Archive::total_archives
);
1044 fprintf(stderr
, _("%s: total archive members: %u\n"),
1045 program_name
, Archive::total_members
);
1046 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1047 program_name
, Archive::total_members_loaded
);
1050 // Add_archive_symbols methods.
1052 Add_archive_symbols::~Add_archive_symbols()
1054 if (this->this_blocker_
!= NULL
)
1055 delete this->this_blocker_
;
1056 // next_blocker_ is deleted by the task associated with the next
1060 // Return whether we can add the archive symbols. We are blocked by
1061 // this_blocker_. We block next_blocker_. We also lock the file.
1064 Add_archive_symbols::is_runnable()
1066 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1067 return this->this_blocker_
;
1072 Add_archive_symbols::locks(Task_locker
* tl
)
1074 tl
->add(this, this->next_blocker_
);
1075 tl
->add(this, this->archive_
->token());
1079 Add_archive_symbols::run(Workqueue
* workqueue
)
1081 // For an incremental link, begin recording layout information.
1082 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1083 if (incremental_inputs
!= NULL
)
1085 unsigned int arg_serial
= this->input_argument_
->file().arg_serial();
1086 Script_info
* script_info
= this->input_argument_
->script_info();
1087 incremental_inputs
->report_archive_begin(this->archive_
, arg_serial
,
1091 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1092 this->input_objects_
,
1094 this->archive_
->unlock_nested_archives();
1096 this->archive_
->release();
1097 this->archive_
->clear_uncached_views();
1101 // This archive holds object files which are incompatible with
1103 Read_symbols::incompatible_warning(this->input_argument_
,
1104 this->archive_
->input_file());
1105 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1106 this->layout_
, this->dirpath_
, this->dirindex_
,
1107 this->mapfile_
, this->input_argument_
,
1108 this->input_group_
, this->next_blocker_
);
1109 delete this->archive_
;
1113 if (this->input_group_
!= NULL
)
1114 this->input_group_
->add_archive(this->archive_
);
1117 // For an incremental link, finish recording the layout information.
1118 if (incremental_inputs
!= NULL
)
1119 incremental_inputs
->report_archive_end(this->archive_
);
1121 if (!parameters
->options().has_plugins()
1122 || this->archive_
->input_file()->options().whole_archive())
1124 // We no longer need to know about this archive.
1125 delete this->archive_
;
1129 // The plugin interface may want to rescan this archive.
1130 parameters
->options().plugins()->save_archive(this->archive_
);
1133 this->archive_
= NULL
;
1137 // Class Lib_group static variables.
1138 unsigned int Lib_group::total_lib_groups
;
1139 unsigned int Lib_group::total_members
;
1140 unsigned int Lib_group::total_members_loaded
;
1142 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1143 : Library_base(task
), members_()
1145 this->members_
.resize(lib
->size());
1149 Lib_group::do_filename() const
1151 std::string
*filename
= new std::string("/group/");
1155 // Select members from the lib group and add them to the link. We walk
1156 // through the members, and check if each one up should be included.
1157 // If the object says it should be included, we do so. We have to do
1158 // this in a loop, since including one member may create new undefined
1159 // symbols which may be satisfied by other members.
1162 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1163 Input_objects
* input_objects
)
1165 ++Lib_group::total_lib_groups
;
1167 Lib_group::total_members
+= this->members_
.size();
1169 bool added_new_object
;
1172 added_new_object
= false;
1174 while (i
< this->members_
.size())
1176 const Archive_member
& member
= this->members_
[i
];
1177 Object
* obj
= member
.obj_
;
1180 // Skip files with no symbols. Plugin objects have
1181 // member.sd_ == NULL.
1183 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1185 Archive::Should_include t
= obj
->should_include_member(symtab
,
1190 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1196 this->include_member(symtab
, layout
, input_objects
, member
);
1198 added_new_object
= true;
1202 if (member
.sd_
!= NULL
)
1204 // The file must be locked in order to destroy the views
1205 // associated with it.
1206 gold_assert(obj
!= NULL
);
1207 obj
->lock(this->task_
);
1209 obj
->unlock(this->task_
);
1213 this->members_
[i
] = this->members_
.back();
1214 this->members_
.pop_back();
1217 while (added_new_object
);
1220 // Include a lib group member in the link.
1223 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1224 Input_objects
* input_objects
,
1225 const Archive_member
& member
)
1227 ++Lib_group::total_members_loaded
;
1229 Object
* obj
= member
.obj_
;
1230 gold_assert(obj
!= NULL
);
1232 Pluginobj
* pluginobj
= obj
->pluginobj();
1233 if (pluginobj
!= NULL
)
1235 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1239 Read_symbols_data
* sd
= member
.sd_
;
1240 gold_assert(sd
!= NULL
);
1241 obj
->lock(this->task_
);
1242 if (input_objects
->add_object(obj
))
1244 if (layout
->incremental_inputs() != NULL
)
1245 layout
->incremental_inputs()->report_object(obj
, member
.arg_serial_
,
1247 obj
->layout(symtab
, layout
, sd
);
1248 obj
->add_symbols(symtab
, sd
, layout
);
1251 // Unlock the file for the next task.
1252 obj
->unlock(this->task_
);
1255 // Iterate over all unused symbols, and call the visitor class V for each.
1258 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1260 // Files are removed from the members list when used, so all the
1261 // files remaining on the list are unused.
1262 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1263 p
!= this->members_
.end();
1266 Object
* obj
= p
->obj_
;
1267 obj
->for_all_global_symbols(p
->sd_
, v
);
1271 // Print statistical information to stderr. This is used for --stats.
1274 Lib_group::print_stats()
1276 fprintf(stderr
, _("%s: lib groups: %u\n"),
1277 program_name
, Lib_group::total_lib_groups
);
1278 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1279 program_name
, Lib_group::total_members
);
1280 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1281 program_name
, Lib_group::total_members_loaded
);
1285 Add_lib_group_symbols::is_runnable()
1287 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1288 return this->readsyms_blocker_
;
1289 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1290 return this->this_blocker_
;
1295 Add_lib_group_symbols::locks(Task_locker
* tl
)
1297 tl
->add(this, this->next_blocker_
);
1301 Add_lib_group_symbols::run(Workqueue
*)
1303 // For an incremental link, begin recording layout information.
1304 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1305 if (incremental_inputs
!= NULL
)
1306 incremental_inputs
->report_archive_begin(this->lib_
, 0, NULL
);
1308 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1310 if (incremental_inputs
!= NULL
)
1311 incremental_inputs
->report_archive_end(this->lib_
);
1314 Add_lib_group_symbols::~Add_lib_group_symbols()
1316 if (this->this_blocker_
!= NULL
)
1317 delete this->this_blocker_
;
1318 // next_blocker_ is deleted by the task associated with the next
1322 } // End namespace gold.