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"),
117 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
119 else if (!sym
->is_undefined())
120 return Library_base::SHOULD_INCLUDE_NO
;
121 // PR 12001: Do not include an archive when the undefined
122 // symbol has actually been defined on the command line.
123 else if (layout
->script_options()->is_pending_assignment(sym_name
))
124 return Library_base::SHOULD_INCLUDE_NO
;
125 else if (sym
->binding() == elfcpp::STB_WEAK
)
126 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
128 return Library_base::SHOULD_INCLUDE_YES
;
131 // The header of an entry in the archive. This is all readable text,
132 // padded with spaces where necessary. If the contents of an archive
133 // are all text file, the entire archive is readable.
135 struct Archive::Archive_header
139 // The file modification time.
141 // The user's UID in decimal.
143 // The user's GID in decimal.
145 // The file mode in octal.
147 // The file size in decimal.
149 // The final magic code.
153 // Class Archive static variables.
154 unsigned int Archive::total_archives
;
155 unsigned int Archive::total_members
;
156 unsigned int Archive::total_members_loaded
;
160 const char Archive::armag
[sarmag
] =
162 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
165 const char Archive::armagt
[sarmag
] =
167 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
170 const char Archive::arfmag
[2] = { '`', '\n' };
172 Archive::Archive(const std::string
& name
, Input_file
* input_file
,
173 bool is_thin_archive
, Dirsearch
* dirpath
, Task
* task
)
174 : Library_base(task
), name_(name
), input_file_(input_file
), armap_(),
175 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
176 members_(), is_thin_archive_(is_thin_archive
), included_member_(false),
177 nested_archives_(), dirpath_(dirpath
), num_members_(0)
180 parameters
->options().check_excluded_libs(input_file
->found_name());
183 // Set up the archive: read the symbol map and the extended name
189 // We need to ignore empty archives.
190 if (this->input_file_
->file().filesize() == sarmag
)
193 // The first member of the archive should be the symbol table.
194 std::string armap_name
;
195 off_t header_size
= this->read_header(sarmag
, false, &armap_name
, NULL
);
196 if (header_size
== -1)
199 section_size_type armap_size
= convert_to_section_size_type(header_size
);
201 if (armap_name
.empty())
203 this->read_armap(sarmag
+ sizeof(Archive_header
), armap_size
);
204 off
= sarmag
+ sizeof(Archive_header
) + armap_size
;
206 else if (!this->input_file_
->options().whole_archive())
207 gold_error(_("%s: no archive symbol table (run ranlib)"),
208 this->name().c_str());
210 // See if there is an extended name table. We cache these views
211 // because it is likely that we will want to read the following
212 // header in the add_symbols routine.
216 header_size
= this->read_header(off
, true, &xname
, NULL
);
217 if (header_size
== -1)
220 section_size_type extended_size
= convert_to_section_size_type(header_size
);
223 const unsigned char* p
= this->get_view(off
+ sizeof(Archive_header
),
224 extended_size
, false, true);
225 const char* px
= reinterpret_cast<const char*>(p
);
226 this->extended_names_
.assign(px
, extended_size
);
228 bool preread_syms
= (parameters
->options().threads()
229 && parameters
->options().preread_archive_symbols());
230 #ifndef ENABLE_THREADS
231 preread_syms
= false;
233 if (parameters
->options().has_plugins())
234 preread_syms
= false;
237 this->read_all_symbols();
240 // Unlock any nested archives.
243 Archive::unlock_nested_archives()
245 for (Nested_archive_table::iterator p
= this->nested_archives_
.begin();
246 p
!= this->nested_archives_
.end();
249 p
->second
->unlock(this->task_
);
253 // Read the archive symbol map.
256 Archive::read_armap(off_t start
, section_size_type size
)
258 // To count the total number of archive members, we'll just count
259 // the number of times the file offset changes. Since most archives
260 // group the symbols in the armap by object, this ought to give us
261 // an accurate count.
262 off_t last_seen_offset
= -1;
264 // Read in the entire armap.
265 const unsigned char* p
= this->get_view(start
, size
, true, false);
267 // Numbers in the armap are always big-endian.
268 const elfcpp::Elf_Word
* pword
= reinterpret_cast<const elfcpp::Elf_Word
*>(p
);
269 unsigned int nsyms
= elfcpp::Swap
<32, true>::readval(pword
);
272 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
273 const char* pnames
= reinterpret_cast<const char*>(pword
+ nsyms
);
274 section_size_type names_size
=
275 reinterpret_cast<const char*>(p
) + size
- pnames
;
276 this->armap_names_
.assign(pnames
, names_size
);
278 this->armap_
.resize(nsyms
);
280 section_offset_type name_offset
= 0;
281 for (unsigned int i
= 0; i
< nsyms
; ++i
)
283 this->armap_
[i
].name_offset
= name_offset
;
284 this->armap_
[i
].file_offset
= elfcpp::Swap
<32, true>::readval(pword
);
285 name_offset
+= strlen(pnames
+ name_offset
) + 1;
287 if (this->armap_
[i
].file_offset
!= last_seen_offset
)
289 last_seen_offset
= this->armap_
[i
].file_offset
;
290 ++this->num_members_
;
294 if (static_cast<section_size_type
>(name_offset
) > names_size
)
295 gold_error(_("%s: bad archive symbol table names"),
296 this->name().c_str());
298 // This array keeps track of which symbols are for archive elements
299 // which we have already included in the link.
300 this->armap_checked_
.resize(nsyms
);
303 // Read the header of an archive member at OFF. Fail if something
304 // goes wrong. Return the size of the member. Set *PNAME to the name
308 Archive::read_header(off_t off
, bool cache
, std::string
* pname
,
311 const unsigned char* p
= this->get_view(off
, sizeof(Archive_header
), true,
313 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(p
);
314 return this->interpret_header(hdr
, off
, pname
, nested_off
);
317 // Interpret the header of HDR, the header of the archive member at
318 // file offset OFF. Return the size of the member, or -1 if something
319 // has gone wrong. Set *PNAME to the name of the member.
322 Archive::interpret_header(const Archive_header
* hdr
, off_t off
,
323 std::string
* pname
, off_t
* nested_off
) const
325 if (memcmp(hdr
->ar_fmag
, arfmag
, sizeof arfmag
) != 0)
327 gold_error(_("%s: malformed archive header at %zu"),
328 this->name().c_str(), static_cast<size_t>(off
));
332 const int size_string_size
= sizeof hdr
->ar_size
;
333 char size_string
[size_string_size
+ 1];
334 memcpy(size_string
, hdr
->ar_size
, size_string_size
);
335 char* ps
= size_string
+ size_string_size
;
336 while (ps
[-1] == ' ')
342 off_t member_size
= strtol(size_string
, &end
, 10);
345 || (member_size
== LONG_MAX
&& errno
== ERANGE
))
347 gold_error(_("%s: malformed archive header size at %zu"),
348 this->name().c_str(), static_cast<size_t>(off
));
352 if (hdr
->ar_name
[0] != '/')
354 const char* name_end
= strchr(hdr
->ar_name
, '/');
356 || name_end
- hdr
->ar_name
>= static_cast<int>(sizeof hdr
->ar_name
))
358 gold_error(_("%s: malformed archive header name at %zu"),
359 this->name().c_str(), static_cast<size_t>(off
));
362 pname
->assign(hdr
->ar_name
, name_end
- hdr
->ar_name
);
363 if (nested_off
!= NULL
)
366 else if (hdr
->ar_name
[1] == ' ')
368 // This is the symbol table.
372 else if (hdr
->ar_name
[1] == '/')
374 // This is the extended name table.
375 pname
->assign(1, '/');
380 long x
= strtol(hdr
->ar_name
+ 1, &end
, 10);
383 y
= strtol(end
+ 1, &end
, 10);
386 || (x
== LONG_MAX
&& errno
== ERANGE
)
387 || static_cast<size_t>(x
) >= this->extended_names_
.size())
389 gold_error(_("%s: bad extended name index at %zu"),
390 this->name().c_str(), static_cast<size_t>(off
));
394 const char* name
= this->extended_names_
.data() + x
;
395 const char* name_end
= strchr(name
, '\n');
396 if (static_cast<size_t>(name_end
- name
) > this->extended_names_
.size()
397 || name_end
[-1] != '/')
399 gold_error(_("%s: bad extended name entry at header %zu"),
400 this->name().c_str(), static_cast<size_t>(off
));
403 pname
->assign(name
, name_end
- 1 - name
);
404 if (nested_off
!= NULL
)
411 // An archive member iterator.
413 class Archive::const_iterator
416 // The header of an archive member. This is what this iterator
420 // The name of the member.
422 // The file offset of the member.
424 // The file offset of a nested archive member.
426 // The size of the member.
430 const_iterator(Archive
* archive
, off_t off
)
431 : archive_(archive
), off_(off
)
432 { this->read_next_header(); }
436 { return this->header_
; }
440 { return &this->header_
; }
445 if (this->off_
== this->archive_
->file().filesize())
447 this->off_
+= sizeof(Archive_header
);
448 if (!this->archive_
->is_thin_archive())
449 this->off_
+= this->header_
.size
;
450 if ((this->off_
& 1) != 0)
452 this->read_next_header();
459 const_iterator ret
= *this;
465 operator==(const const_iterator p
) const
466 { return this->off_
== p
->off
; }
469 operator!=(const const_iterator p
) const
470 { return this->off_
!= p
->off
; }
476 // The underlying archive.
478 // The current offset in the file.
480 // The current archive header.
484 // Read the next archive header.
487 Archive::const_iterator::read_next_header()
489 off_t filesize
= this->archive_
->file().filesize();
492 if (filesize
- this->off_
< static_cast<off_t
>(sizeof(Archive_header
)))
494 if (filesize
!= this->off_
)
496 gold_error(_("%s: short archive header at %zu"),
497 this->archive_
->filename().c_str(),
498 static_cast<size_t>(this->off_
));
499 this->off_
= filesize
;
501 this->header_
.off
= filesize
;
505 unsigned char buf
[sizeof(Archive_header
)];
506 this->archive_
->file().read(this->off_
, sizeof(Archive_header
), buf
);
508 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(buf
);
509 off_t size
= this->archive_
->interpret_header(hdr
, this->off_
,
511 &this->header_
.nested_off
);
514 this->header_
.off
= filesize
;
518 this->header_
.size
= size
;
519 this->header_
.off
= this->off_
;
521 // Skip special members.
522 if (!this->header_
.name
.empty() && this->header_
.name
!= "/")
525 this->off_
+= sizeof(Archive_header
) + this->header_
.size
;
526 if ((this->off_
& 1) != 0)
533 Archive::const_iterator
536 return Archive::const_iterator(this, sarmag
);
541 Archive::const_iterator
544 return Archive::const_iterator(this, this->input_file_
->file().filesize());
547 // Get the file and offset for an archive member, which may be an
548 // external member of a thin archive. Set *INPUT_FILE to the
549 // file containing the actual member, *MEMOFF to the offset
550 // within that file (0 if not a nested archive), and *MEMBER_NAME
551 // to the name of the archive member. Return TRUE on success.
554 Archive::get_file_and_offset(off_t off
, Input_file
** input_file
, off_t
* memoff
,
555 off_t
* memsize
, std::string
* member_name
)
559 *memsize
= this->read_header(off
, false, member_name
, &nested_off
);
563 *input_file
= this->input_file_
;
564 *memoff
= off
+ static_cast<off_t
>(sizeof(Archive_header
));
566 if (!this->is_thin_archive_
)
569 // Adjust a relative pathname so that it is relative
570 // to the directory containing the archive.
571 if (!IS_ABSOLUTE_PATH(member_name
->c_str()))
573 const char* arch_path
= this->filename().c_str();
574 const char* basename
= lbasename(arch_path
);
575 if (basename
> arch_path
)
576 member_name
->replace(0, 0,
577 this->filename().substr(0, basename
- arch_path
));
582 // This is a member of a nested archive. Open the containing
583 // archive if we don't already have it open, then do a recursive
584 // call to include the member from that archive.
586 Nested_archive_table::const_iterator p
=
587 this->nested_archives_
.find(*member_name
);
588 if (p
!= this->nested_archives_
.end())
592 Input_file_argument
* input_file_arg
=
593 new Input_file_argument(member_name
->c_str(),
594 Input_file_argument::INPUT_FILE_TYPE_FILE
,
595 "", false, parameters
->options());
596 *input_file
= new Input_file(input_file_arg
);
598 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
600 arch
= new Archive(*member_name
, *input_file
, false, this->dirpath_
,
603 std::pair
<Nested_archive_table::iterator
, bool> ins
=
604 this->nested_archives_
.insert(std::make_pair(*member_name
, arch
));
605 gold_assert(ins
.second
);
607 return arch
->get_file_and_offset(nested_off
, input_file
, memoff
,
608 memsize
, member_name
);
611 // This is an external member of a thin archive. Open the
612 // file as a regular relocatable object file.
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, this->input_file_
->options());
617 *input_file
= new Input_file(input_file_arg
);
619 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
623 *memsize
= (*input_file
)->file().filesize();
627 // Return an ELF object for the member at offset OFF. If
628 // PUNCONFIGURED is not NULL, then if the ELF object has an
629 // unsupported target type, set *PUNCONFIGURED to true and return
633 Archive::get_elf_object_for_member(off_t off
, bool* punconfigured
)
635 if (punconfigured
!= NULL
)
636 *punconfigured
= false;
638 Input_file
* input_file
;
641 std::string member_name
;
642 if (!this->get_file_and_offset(off
, &input_file
, &memoff
, &memsize
,
646 if (parameters
->options().has_plugins())
648 Object
* obj
= parameters
->options().plugins()->claim_file(input_file
,
653 // The input file was claimed by a plugin, and its symbols
654 // have been provided by the plugin.
659 const unsigned char* ehdr
;
661 if (!is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
663 gold_error(_("%s: member at %zu is not an ELF object"),
664 this->name().c_str(), static_cast<size_t>(off
));
668 Object
* obj
= make_elf_object((std::string(this->input_file_
->filename())
669 + "(" + member_name
+ ")"),
670 input_file
, memoff
, ehdr
, read_size
,
674 obj
->set_no_export(this->no_export());
678 // Read the symbols from all the archive members in the link.
681 Archive::read_all_symbols()
683 for (Archive::const_iterator p
= this->begin();
686 this->read_symbols(p
->off
);
689 // Read the symbols from an archive member in the link. OFF is the file
690 // offset of the member header.
693 Archive::read_symbols(off_t off
)
695 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
699 Read_symbols_data
* sd
= new Read_symbols_data
;
700 obj
->read_symbols(sd
);
701 Archive_member
member(obj
, sd
);
702 this->members_
[off
] = member
;
705 // Select members from the archive and add them to the link. We walk
706 // through the elements in the archive map, and look each one up in
707 // the symbol table. If it exists as a strong undefined symbol, we
708 // pull in the corresponding element. We have to do this in a loop,
709 // since pulling in one element may create new undefined symbols which
710 // may be satisfied by other objects in the archive. Return true in
711 // the normal case, false if the first member we tried to add from
712 // this archive had an incompatible target.
715 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
716 Input_objects
* input_objects
, Mapfile
* mapfile
)
718 ++Archive::total_archives
;
720 if (this->input_file_
->options().whole_archive())
721 return this->include_all_members(symtab
, layout
, input_objects
,
724 Archive::total_members
+= this->num_members_
;
726 input_objects
->archive_start(this);
728 const size_t armap_size
= this->armap_
.size();
730 // This is a quick optimization, since we usually see many symbols
731 // in a row with the same offset. last_seen_offset holds the last
732 // offset we saw that was present in the seen_offsets_ set.
733 off_t last_seen_offset
= -1;
735 // Track which symbols in the symbol table we've already found to be
739 size_t tmpbuflen
= 0;
740 bool added_new_object
;
743 added_new_object
= false;
744 for (size_t i
= 0; i
< armap_size
; ++i
)
746 if (this->armap_checked_
[i
])
748 if (this->armap_
[i
].file_offset
== last_seen_offset
)
750 this->armap_checked_
[i
] = true;
753 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
754 != this->seen_offsets_
.end())
756 this->armap_checked_
[i
] = true;
757 last_seen_offset
= this->armap_
[i
].file_offset
;
761 const char* sym_name
= (this->armap_names_
.data()
762 + this->armap_
[i
].name_offset
);
766 Archive::Should_include t
=
767 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
768 &why
, &tmpbuf
, &tmpbuflen
);
770 if (t
== Archive::SHOULD_INCLUDE_NO
771 || t
== Archive::SHOULD_INCLUDE_YES
)
772 this->armap_checked_
[i
] = true;
774 if (t
!= Archive::SHOULD_INCLUDE_YES
)
777 // We want to include this object in the link.
778 last_seen_offset
= this->armap_
[i
].file_offset
;
779 this->seen_offsets_
.insert(last_seen_offset
);
781 if (!this->include_member(symtab
, layout
, input_objects
,
782 last_seen_offset
, mapfile
, sym
,
790 added_new_object
= true;
793 while (added_new_object
);
798 input_objects
->archive_stop(this);
803 // Return whether the archive includes a member which defines the
807 Archive::defines_symbol(Symbol
* sym
) const
809 const char* symname
= sym
->name();
810 size_t symname_len
= strlen(symname
);
811 size_t armap_size
= this->armap_
.size();
812 for (size_t i
= 0; i
< armap_size
; ++i
)
814 if (this->armap_checked_
[i
])
816 const char* archive_symname
= (this->armap_names_
.data()
817 + this->armap_
[i
].name_offset
);
818 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
820 char c
= archive_symname
[symname_len
];
821 if (c
== '\0' && sym
->version() == NULL
)
825 const char* ver
= archive_symname
+ symname_len
+ 1;
828 if (sym
->version() == NULL
)
832 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
839 // Include all the archive members in the link. This is for --whole-archive.
842 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
843 Input_objects
* input_objects
, Mapfile
* mapfile
)
845 input_objects
->archive_start(this);
847 if (this->members_
.size() > 0)
849 std::map
<off_t
, Archive_member
>::const_iterator p
;
850 for (p
= this->members_
.begin();
851 p
!= this->members_
.end();
854 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
855 mapfile
, NULL
, "--whole-archive"))
857 ++Archive::total_members
;
862 for (Archive::const_iterator p
= this->begin();
866 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
867 mapfile
, NULL
, "--whole-archive"))
869 ++Archive::total_members
;
873 input_objects
->archive_stop(this);
878 // Return the number of members in the archive. This is only used for
882 Archive::count_members()
885 for (Archive::const_iterator p
= this->begin();
892 // Include an archive member in the link. OFF is the file offset of
893 // the member header. WHY is the reason we are including this member.
894 // Return true if we added the member or if we had an error, return
895 // false if this was the first member we tried to add from this
896 // archive and it had an incompatible format.
899 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
900 Input_objects
* input_objects
, off_t off
,
901 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
903 ++Archive::total_members_loaded
;
905 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
906 if (p
!= this->members_
.end())
908 Object
* obj
= p
->second
.obj_
;
910 Read_symbols_data
* sd
= p
->second
.sd_
;
912 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
913 if (input_objects
->add_object(obj
))
915 obj
->layout(symtab
, layout
, sd
);
916 obj
->add_symbols(symtab
, sd
, layout
);
917 this->included_member_
= true;
923 // If this is the first object we are including from this archive,
924 // and we searched for this archive, most likely because it was
925 // found via a -l option, then if the target is incompatible we want
926 // to move on to the next archive found in the search path.
927 bool unconfigured
= false;
928 bool* punconfigured
= NULL
;
929 if (!this->included_member_
&& this->searched_for())
930 punconfigured
= &unconfigured
;
932 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
935 // Return false to search for another archive, true if we found
937 return unconfigured
? false : true;
941 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
943 Pluginobj
* pluginobj
= obj
->pluginobj();
944 if (pluginobj
!= NULL
)
946 pluginobj
->add_symbols(symtab
, NULL
, layout
);
947 this->included_member_
= true;
951 if (!input_objects
->add_object(obj
))
953 // If this is an external member of a thin archive, unlock the
955 if (obj
->offset() == 0)
956 obj
->unlock(this->task_
);
962 if (layout
->incremental_inputs() != NULL
)
963 layout
->incremental_inputs()->report_object(obj
, this, NULL
);
964 Read_symbols_data sd
;
965 obj
->read_symbols(&sd
);
966 obj
->layout(symtab
, layout
, &sd
);
967 obj
->add_symbols(symtab
, &sd
, layout
);
970 // If this is an external member of a thin archive, unlock the file
971 // for the next task.
972 if (obj
->offset() == 0)
973 obj
->unlock(this->task_
);
975 this->included_member_
= true;
981 // Iterate over all unused symbols, and call the visitor class V for each.
984 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
986 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
987 p
!= this->armap_
.end();
990 if (this->seen_offsets_
.find(p
->file_offset
)
991 == this->seen_offsets_
.end())
992 v
->visit(this->armap_names_
.data() + p
->name_offset
);
996 // Print statistical information to stderr. This is used for --stats.
999 Archive::print_stats()
1001 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1002 program_name
, Archive::total_archives
);
1003 fprintf(stderr
, _("%s: total archive members: %u\n"),
1004 program_name
, Archive::total_members
);
1005 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1006 program_name
, Archive::total_members_loaded
);
1009 // Add_archive_symbols methods.
1011 Add_archive_symbols::~Add_archive_symbols()
1013 if (this->this_blocker_
!= NULL
)
1014 delete this->this_blocker_
;
1015 // next_blocker_ is deleted by the task associated with the next
1019 // Return whether we can add the archive symbols. We are blocked by
1020 // this_blocker_. We block next_blocker_. We also lock the file.
1023 Add_archive_symbols::is_runnable()
1025 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1026 return this->this_blocker_
;
1031 Add_archive_symbols::locks(Task_locker
* tl
)
1033 tl
->add(this, this->next_blocker_
);
1034 tl
->add(this, this->archive_
->token());
1038 Add_archive_symbols::run(Workqueue
* workqueue
)
1040 // For an incremental link, begin recording layout information.
1041 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1042 if (incremental_inputs
!= NULL
)
1043 incremental_inputs
->report_archive_begin(this->archive_
,
1044 this->input_argument_
->script_info());
1046 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1047 this->input_objects_
,
1049 this->archive_
->unlock_nested_archives();
1051 this->archive_
->release();
1052 this->archive_
->clear_uncached_views();
1056 // This archive holds object files which are incompatible with
1058 Read_symbols::incompatible_warning(this->input_argument_
,
1059 this->archive_
->input_file());
1060 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1061 this->layout_
, this->dirpath_
, this->dirindex_
,
1062 this->mapfile_
, this->input_argument_
,
1063 this->input_group_
, this->next_blocker_
);
1064 delete this->archive_
;
1068 if (this->input_group_
!= NULL
)
1069 this->input_group_
->add_archive(this->archive_
);
1072 // For an incremental link, finish recording the layout information.
1073 if (incremental_inputs
!= NULL
)
1074 incremental_inputs
->report_archive_end(this->archive_
);
1076 if (!parameters
->options().has_plugins()
1077 || this->archive_
->input_file()->options().whole_archive())
1079 // We no longer need to know about this archive.
1080 delete this->archive_
;
1084 // The plugin interface may want to rescan this archive.
1085 parameters
->options().plugins()->save_archive(this->archive_
);
1088 this->archive_
= NULL
;
1092 // Class Lib_group static variables.
1093 unsigned int Lib_group::total_lib_groups
;
1094 unsigned int Lib_group::total_members
;
1095 unsigned int Lib_group::total_members_loaded
;
1097 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1098 : Library_base(task
), lib_(lib
), members_()
1100 this->members_
.resize(lib
->size());
1104 Lib_group::do_filename() const
1106 std::string
*filename
= new std::string("<group>");
1110 // Select members from the lib group and add them to the link. We walk
1111 // through the members, and check if each one up should be included.
1112 // If the object says it should be included, we do so. We have to do
1113 // this in a loop, since including one member may create new undefined
1114 // symbols which may be satisfied by other members.
1117 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1118 Input_objects
* input_objects
)
1120 ++Lib_group::total_lib_groups
;
1122 Lib_group::total_members
+= this->members_
.size();
1124 bool added_new_object
;
1127 added_new_object
= false;
1129 while (i
< this->members_
.size())
1131 const Archive_member
& member
= this->members_
[i
];
1132 Object
* obj
= member
.obj_
;
1135 // Skip files with no symbols. Plugin objects have
1136 // member.sd_ == NULL.
1138 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1140 Archive::Should_include t
= obj
->should_include_member(symtab
,
1145 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1151 this->include_member(symtab
, layout
, input_objects
, member
);
1153 added_new_object
= true;
1157 if (member
.sd_
!= NULL
)
1159 // The file must be locked in order to destroy the views
1160 // associated with it.
1161 gold_assert(obj
!= NULL
);
1162 obj
->lock(this->task_
);
1164 obj
->unlock(this->task_
);
1168 this->members_
[i
] = this->members_
.back();
1169 this->members_
.pop_back();
1172 while (added_new_object
);
1175 // Include a lib group member in the link.
1178 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1179 Input_objects
* input_objects
,
1180 const Archive_member
& member
)
1182 ++Lib_group::total_members_loaded
;
1184 Object
* obj
= member
.obj_
;
1185 gold_assert(obj
!= NULL
);
1187 Pluginobj
* pluginobj
= obj
->pluginobj();
1188 if (pluginobj
!= NULL
)
1190 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1194 Read_symbols_data
* sd
= member
.sd_
;
1195 gold_assert(sd
!= NULL
);
1196 obj
->lock(this->task_
);
1197 if (input_objects
->add_object(obj
))
1199 if (layout
->incremental_inputs() != NULL
)
1200 layout
->incremental_inputs()->report_object(obj
, this, NULL
);
1201 obj
->layout(symtab
, layout
, sd
);
1202 obj
->add_symbols(symtab
, sd
, layout
);
1205 // Unlock the file for the next task.
1206 obj
->unlock(this->task_
);
1209 // Iterate over all unused symbols, and call the visitor class V for each.
1212 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1214 // Files are removed from the members list when used, so all the
1215 // files remaining on the list are unused.
1216 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1217 p
!= this->members_
.end();
1220 Object
* obj
= p
->obj_
;
1221 obj
->for_all_global_symbols(p
->sd_
, v
);
1225 // Print statistical information to stderr. This is used for --stats.
1228 Lib_group::print_stats()
1230 fprintf(stderr
, _("%s: lib groups: %u\n"),
1231 program_name
, Lib_group::total_lib_groups
);
1232 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1233 program_name
, Lib_group::total_members
);
1234 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1235 program_name
, Lib_group::total_members_loaded
);
1239 Add_lib_group_symbols::is_runnable()
1241 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1242 return this->readsyms_blocker_
;
1243 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1244 return this->this_blocker_
;
1249 Add_lib_group_symbols::locks(Task_locker
* tl
)
1251 tl
->add(this, this->next_blocker_
);
1255 Add_lib_group_symbols::run(Workqueue
*)
1257 // For an incremental link, begin recording layout information.
1258 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1259 if (incremental_inputs
!= NULL
)
1260 incremental_inputs
->report_archive_begin(this->lib_
, NULL
);
1262 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1264 if (incremental_inputs
!= NULL
)
1265 incremental_inputs
->report_archive_end(this->lib_
);
1268 Add_lib_group_symbols::~Add_lib_group_symbols()
1270 if (this->this_blocker_
!= NULL
)
1271 delete this->this_blocker_
;
1272 // next_blocker_ is deleted by the task associated with the next
1276 } // End namespace gold.