1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013
4 // Free Software Foundation, Inc.
5 // Written by Ian Lance Taylor <iant@google.com>.
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "libiberty.h"
31 #include "filenames.h"
43 #include "incremental.h"
48 // Library_base methods.
50 // Determine whether a definition of SYM_NAME should cause an archive
51 // library member to be included in the link. Returns SHOULD_INCLUDE_YES
52 // if the symbol is referenced but not defined, SHOULD_INCLUDE_NO if the
53 // symbol is already defined, and SHOULD_INCLUDE_UNKNOWN if the symbol is
54 // neither referenced nor defined.
56 Library_base::Should_include
57 Library_base::should_include_member(Symbol_table
* symtab
, Layout
* layout
,
58 const char* sym_name
, Symbol
** symp
,
59 std::string
* why
, char** tmpbufp
,
62 // In an object file, and therefore in an archive map, an
63 // '@' in the name separates the symbol name from the
64 // version name. If there are two '@' characters, this is
65 // the default version.
66 char* tmpbuf
= *tmpbufp
;
67 const char* ver
= strchr(sym_name
, '@');
71 size_t symlen
= ver
- sym_name
;
72 if (symlen
+ 1 > *tmpbuflen
)
74 tmpbuf
= static_cast<char*>(xrealloc(tmpbuf
, symlen
+ 1));
76 *tmpbuflen
= symlen
+ 1;
78 memcpy(tmpbuf
, sym_name
, symlen
);
79 tmpbuf
[symlen
] = '\0';
90 Symbol
* sym
= symtab
->lookup(sym_name
, ver
);
94 || !sym
->is_undefined()
95 || sym
->binding() == elfcpp::STB_WEAK
))
96 sym
= symtab
->lookup(sym_name
, NULL
);
102 if (!sym
->is_undefined())
103 return Library_base::SHOULD_INCLUDE_NO
;
105 // PR 12001: Do not include an archive when the undefined
106 // symbol has actually been defined on the command line.
107 if (layout
->script_options()->is_pending_assignment(sym_name
))
108 return Library_base::SHOULD_INCLUDE_NO
;
110 // If the symbol is weak undefined, we still need to check
111 // for other reasons (like a -u option).
112 if (sym
->binding() != elfcpp::STB_WEAK
)
113 return Library_base::SHOULD_INCLUDE_YES
;
116 // Check whether the symbol was named in a -u option.
117 if (parameters
->options().is_undefined(sym_name
))
121 return Library_base::SHOULD_INCLUDE_YES
;
124 if (parameters
->options().is_export_dynamic_symbol(sym_name
))
126 *why
= "--export-dynamic-symbol ";
128 return Library_base::SHOULD_INCLUDE_YES
;
131 if (layout
->script_options()->is_referenced(sym_name
))
133 size_t alc
= 100 + strlen(sym_name
);
134 char* buf
= new char[alc
];
135 snprintf(buf
, alc
, _("script or expression reference to %s"),
139 return Library_base::SHOULD_INCLUDE_YES
;
142 if (strcmp(sym_name
, parameters
->entry()) == 0)
144 *why
= "entry symbol ";
146 return Library_base::SHOULD_INCLUDE_YES
;
149 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
152 // The header of an entry in the archive. This is all readable text,
153 // padded with spaces where necessary. If the contents of an archive
154 // are all text file, the entire archive is readable.
156 struct Archive::Archive_header
160 // The file modification time.
162 // The user's UID in decimal.
164 // The user's GID in decimal.
166 // The file mode in octal.
168 // The file size in decimal.
170 // The final magic code.
174 // Class Archive static variables.
175 unsigned int Archive::total_archives
;
176 unsigned int Archive::total_members
;
177 unsigned int Archive::total_members_loaded
;
181 const char Archive::armag
[sarmag
] =
183 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
186 const char Archive::armagt
[sarmag
] =
188 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
191 const char Archive::arfmag
[2] = { '`', '\n' };
193 Archive::Archive(const std::string
& name
, Input_file
* input_file
,
194 bool is_thin_archive
, Dirsearch
* dirpath
, Task
* task
)
195 : Library_base(task
), name_(name
), input_file_(input_file
), armap_(),
196 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
197 members_(), is_thin_archive_(is_thin_archive
), included_member_(false),
198 nested_archives_(), dirpath_(dirpath
), num_members_(0),
199 included_all_members_(false)
202 parameters
->options().check_excluded_libs(input_file
->found_name());
205 // Set up the archive: read the symbol map and the extended name
211 // We need to ignore empty archives.
212 if (this->input_file_
->file().filesize() == sarmag
)
215 // The first member of the archive should be the symbol table.
216 std::string armap_name
;
217 off_t header_size
= this->read_header(sarmag
, false, &armap_name
, NULL
);
218 if (header_size
== -1)
221 section_size_type armap_size
= convert_to_section_size_type(header_size
);
223 if (armap_name
.empty())
225 this->read_armap(sarmag
+ sizeof(Archive_header
), armap_size
);
226 off
= sarmag
+ sizeof(Archive_header
) + armap_size
;
228 else if (!this->input_file_
->options().whole_archive())
229 gold_error(_("%s: no archive symbol table (run ranlib)"),
230 this->name().c_str());
232 // See if there is an extended name table. We cache these views
233 // because it is likely that we will want to read the following
234 // header in the add_symbols routine.
238 header_size
= this->read_header(off
, true, &xname
, NULL
);
239 if (header_size
== -1)
242 section_size_type extended_size
= convert_to_section_size_type(header_size
);
245 const unsigned char* p
= this->get_view(off
+ sizeof(Archive_header
),
246 extended_size
, false, true);
247 const char* px
= reinterpret_cast<const char*>(p
);
248 this->extended_names_
.assign(px
, extended_size
);
250 bool preread_syms
= (parameters
->options().threads()
251 && parameters
->options().preread_archive_symbols());
252 #ifndef ENABLE_THREADS
253 preread_syms
= false;
255 if (parameters
->options().has_plugins())
256 preread_syms
= false;
259 this->read_all_symbols();
262 // Unlock any nested archives.
265 Archive::unlock_nested_archives()
267 for (Nested_archive_table::iterator p
= this->nested_archives_
.begin();
268 p
!= this->nested_archives_
.end();
271 p
->second
->unlock(this->task_
);
275 // Read the archive symbol map.
278 Archive::read_armap(off_t start
, section_size_type size
)
280 // To count the total number of archive members, we'll just count
281 // the number of times the file offset changes. Since most archives
282 // group the symbols in the armap by object, this ought to give us
283 // an accurate count.
284 off_t last_seen_offset
= -1;
286 // Read in the entire armap.
287 const unsigned char* p
= this->get_view(start
, size
, true, false);
289 // Numbers in the armap are always big-endian.
290 const elfcpp::Elf_Word
* pword
= reinterpret_cast<const elfcpp::Elf_Word
*>(p
);
291 unsigned int nsyms
= elfcpp::Swap
<32, true>::readval(pword
);
294 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
295 const char* pnames
= reinterpret_cast<const char*>(pword
+ nsyms
);
296 section_size_type names_size
=
297 reinterpret_cast<const char*>(p
) + size
- pnames
;
298 this->armap_names_
.assign(pnames
, names_size
);
300 this->armap_
.resize(nsyms
);
302 section_offset_type name_offset
= 0;
303 for (unsigned int i
= 0; i
< nsyms
; ++i
)
305 this->armap_
[i
].name_offset
= name_offset
;
306 this->armap_
[i
].file_offset
= elfcpp::Swap
<32, true>::readval(pword
);
307 name_offset
+= strlen(pnames
+ name_offset
) + 1;
309 if (this->armap_
[i
].file_offset
!= last_seen_offset
)
311 last_seen_offset
= this->armap_
[i
].file_offset
;
312 ++this->num_members_
;
316 if (static_cast<section_size_type
>(name_offset
) > names_size
)
317 gold_error(_("%s: bad archive symbol table names"),
318 this->name().c_str());
320 // This array keeps track of which symbols are for archive elements
321 // which we have already included in the link.
322 this->armap_checked_
.resize(nsyms
);
325 // Read the header of an archive member at OFF. Fail if something
326 // goes wrong. Return the size of the member. Set *PNAME to the name
330 Archive::read_header(off_t off
, bool cache
, std::string
* pname
,
333 const unsigned char* p
= this->get_view(off
, sizeof(Archive_header
), true,
335 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(p
);
336 return this->interpret_header(hdr
, off
, pname
, nested_off
);
339 // Interpret the header of HDR, the header of the archive member at
340 // file offset OFF. Return the size of the member, or -1 if something
341 // has gone wrong. Set *PNAME to the name of the member.
344 Archive::interpret_header(const Archive_header
* hdr
, off_t off
,
345 std::string
* pname
, off_t
* nested_off
) const
347 if (memcmp(hdr
->ar_fmag
, arfmag
, sizeof arfmag
) != 0)
349 gold_error(_("%s: malformed archive header at %zu"),
350 this->name().c_str(), static_cast<size_t>(off
));
354 const int size_string_size
= sizeof hdr
->ar_size
;
355 char size_string
[size_string_size
+ 1];
356 memcpy(size_string
, hdr
->ar_size
, size_string_size
);
357 char* ps
= size_string
+ size_string_size
;
358 while (ps
[-1] == ' ')
364 off_t member_size
= strtol(size_string
, &end
, 10);
367 || (member_size
== LONG_MAX
&& errno
== ERANGE
))
369 gold_error(_("%s: malformed archive header size at %zu"),
370 this->name().c_str(), static_cast<size_t>(off
));
374 if (hdr
->ar_name
[0] != '/')
376 const char* name_end
= strchr(hdr
->ar_name
, '/');
378 || name_end
- hdr
->ar_name
>= static_cast<int>(sizeof hdr
->ar_name
))
380 gold_error(_("%s: malformed archive header name at %zu"),
381 this->name().c_str(), static_cast<size_t>(off
));
384 pname
->assign(hdr
->ar_name
, name_end
- hdr
->ar_name
);
385 if (nested_off
!= NULL
)
388 else if (hdr
->ar_name
[1] == ' ')
390 // This is the symbol table.
394 else if (hdr
->ar_name
[1] == '/')
396 // This is the extended name table.
397 pname
->assign(1, '/');
402 long x
= strtol(hdr
->ar_name
+ 1, &end
, 10);
405 y
= strtol(end
+ 1, &end
, 10);
408 || (x
== LONG_MAX
&& errno
== ERANGE
)
409 || static_cast<size_t>(x
) >= this->extended_names_
.size())
411 gold_error(_("%s: bad extended name index at %zu"),
412 this->name().c_str(), static_cast<size_t>(off
));
416 const char* name
= this->extended_names_
.data() + x
;
417 const char* name_end
= strchr(name
, '\n');
418 if (static_cast<size_t>(name_end
- name
) > this->extended_names_
.size()
419 || name_end
[-1] != '/')
421 gold_error(_("%s: bad extended name entry at header %zu"),
422 this->name().c_str(), static_cast<size_t>(off
));
425 pname
->assign(name
, name_end
- 1 - name
);
426 if (nested_off
!= NULL
)
433 // An archive member iterator.
435 class Archive::const_iterator
438 // The header of an archive member. This is what this iterator
442 // The name of the member.
444 // The file offset of the member.
446 // The file offset of a nested archive member.
448 // The size of the member.
452 const_iterator(Archive
* archive
, off_t off
)
453 : archive_(archive
), off_(off
)
454 { this->read_next_header(); }
458 { return this->header_
; }
462 { return &this->header_
; }
467 if (this->off_
== this->archive_
->file().filesize())
469 this->off_
+= sizeof(Archive_header
);
470 if (!this->archive_
->is_thin_archive())
471 this->off_
+= this->header_
.size
;
472 if ((this->off_
& 1) != 0)
474 this->read_next_header();
481 const_iterator ret
= *this;
487 operator==(const const_iterator p
) const
488 { return this->off_
== p
->off
; }
491 operator!=(const const_iterator p
) const
492 { return this->off_
!= p
->off
; }
498 // The underlying archive.
500 // The current offset in the file.
502 // The current archive header.
506 // Read the next archive header.
509 Archive::const_iterator::read_next_header()
511 off_t filesize
= this->archive_
->file().filesize();
514 if (filesize
- this->off_
< static_cast<off_t
>(sizeof(Archive_header
)))
516 if (filesize
!= this->off_
)
518 gold_error(_("%s: short archive header at %zu"),
519 this->archive_
->filename().c_str(),
520 static_cast<size_t>(this->off_
));
521 this->off_
= filesize
;
523 this->header_
.off
= filesize
;
527 unsigned char buf
[sizeof(Archive_header
)];
528 this->archive_
->file().read(this->off_
, sizeof(Archive_header
), buf
);
530 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(buf
);
531 off_t size
= this->archive_
->interpret_header(hdr
, this->off_
,
533 &this->header_
.nested_off
);
536 this->header_
.off
= filesize
;
540 this->header_
.size
= size
;
541 this->header_
.off
= this->off_
;
543 // Skip special members.
544 if (!this->header_
.name
.empty() && this->header_
.name
!= "/")
547 this->off_
+= sizeof(Archive_header
) + this->header_
.size
;
548 if ((this->off_
& 1) != 0)
555 Archive::const_iterator
558 return Archive::const_iterator(this, sarmag
);
563 Archive::const_iterator
566 return Archive::const_iterator(this, this->input_file_
->file().filesize());
569 // Get the file and offset for an archive member, which may be an
570 // external member of a thin archive. Set *INPUT_FILE to the
571 // file containing the actual member, *MEMOFF to the offset
572 // within that file (0 if not a nested archive), and *MEMBER_NAME
573 // to the name of the archive member. Return TRUE on success.
576 Archive::get_file_and_offset(off_t off
, Input_file
** input_file
, off_t
* memoff
,
577 off_t
* memsize
, std::string
* member_name
)
581 *memsize
= this->read_header(off
, false, member_name
, &nested_off
);
585 *input_file
= this->input_file_
;
586 *memoff
= off
+ static_cast<off_t
>(sizeof(Archive_header
));
588 if (!this->is_thin_archive_
)
591 // Adjust a relative pathname so that it is relative
592 // to the directory containing the archive.
593 if (!IS_ABSOLUTE_PATH(member_name
->c_str()))
595 const char* arch_path
= this->filename().c_str();
596 const char* basename
= lbasename(arch_path
);
597 if (basename
> arch_path
)
598 member_name
->replace(0, 0,
599 this->filename().substr(0, basename
- arch_path
));
604 // This is a member of a nested archive. Open the containing
605 // archive if we don't already have it open, then do a recursive
606 // call to include the member from that archive.
608 Nested_archive_table::const_iterator p
=
609 this->nested_archives_
.find(*member_name
);
610 if (p
!= this->nested_archives_
.end())
614 Input_file_argument
* input_file_arg
=
615 new Input_file_argument(member_name
->c_str(),
616 Input_file_argument::INPUT_FILE_TYPE_FILE
,
617 "", false, parameters
->options());
618 *input_file
= new Input_file(input_file_arg
);
620 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
622 arch
= new Archive(*member_name
, *input_file
, false, this->dirpath_
,
625 std::pair
<Nested_archive_table::iterator
, bool> ins
=
626 this->nested_archives_
.insert(std::make_pair(*member_name
, arch
));
627 gold_assert(ins
.second
);
629 return arch
->get_file_and_offset(nested_off
, input_file
, memoff
,
630 memsize
, member_name
);
633 // This is an external member of a thin archive. Open the
634 // file as a regular relocatable object file.
635 Input_file_argument
* input_file_arg
=
636 new Input_file_argument(member_name
->c_str(),
637 Input_file_argument::INPUT_FILE_TYPE_FILE
,
638 "", false, this->input_file_
->options());
639 *input_file
= new Input_file(input_file_arg
);
641 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
645 *memsize
= (*input_file
)->file().filesize();
649 // Return an ELF object for the member at offset OFF. If
650 // PUNCONFIGURED is not NULL, then if the ELF object has an
651 // unsupported target type, set *PUNCONFIGURED to true and return
655 Archive::get_elf_object_for_member(off_t off
, bool* punconfigured
)
657 if (punconfigured
!= NULL
)
658 *punconfigured
= false;
660 Input_file
* input_file
;
663 std::string member_name
;
664 if (!this->get_file_and_offset(off
, &input_file
, &memoff
, &memsize
,
668 const unsigned char* ehdr
;
671 bool is_elf_obj
= false;
673 if (is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
675 obj
= make_elf_object((std::string(this->input_file_
->filename())
676 + "(" + member_name
+ ")"),
677 input_file
, memoff
, ehdr
, read_size
,
682 if (parameters
->options().has_plugins())
685 = parameters
->options().plugins()->claim_file(input_file
,
689 if (plugin_obj
!= NULL
)
691 // The input file was claimed by a plugin, and its symbols
692 // have been provided by the plugin.
693 // Delete its elf object.
702 gold_error(_("%s: member at %zu is not an ELF object"),
703 this->name().c_str(), static_cast<size_t>(off
));
709 obj
->set_no_export(this->no_export());
713 // Read the symbols from all the archive members in the link.
716 Archive::read_all_symbols()
718 for (Archive::const_iterator p
= this->begin();
721 this->read_symbols(p
->off
);
724 // Read the symbols from an archive member in the link. OFF is the file
725 // offset of the member header.
728 Archive::read_symbols(off_t off
)
730 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
734 Read_symbols_data
* sd
= new Read_symbols_data
;
735 obj
->read_symbols(sd
);
736 Archive_member
member(obj
, sd
);
737 this->members_
[off
] = member
;
740 // Select members from the archive and add them to the link. We walk
741 // through the elements in the archive map, and look each one up in
742 // the symbol table. If it exists as a strong undefined symbol, we
743 // pull in the corresponding element. We have to do this in a loop,
744 // since pulling in one element may create new undefined symbols which
745 // may be satisfied by other objects in the archive. Return true in
746 // the normal case, false if the first member we tried to add from
747 // this archive had an incompatible target.
750 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
751 Input_objects
* input_objects
, Mapfile
* mapfile
)
753 ++Archive::total_archives
;
755 if (this->input_file_
->options().whole_archive())
756 return this->include_all_members(symtab
, layout
, input_objects
,
759 Archive::total_members
+= this->num_members_
;
761 input_objects
->archive_start(this);
763 const size_t armap_size
= this->armap_
.size();
765 // This is a quick optimization, since we usually see many symbols
766 // in a row with the same offset. last_seen_offset holds the last
767 // offset we saw that was present in the seen_offsets_ set.
768 off_t last_seen_offset
= -1;
770 // Track which symbols in the symbol table we've already found to be
774 size_t tmpbuflen
= 0;
775 bool added_new_object
;
778 added_new_object
= false;
779 for (size_t i
= 0; i
< armap_size
; ++i
)
781 if (this->armap_checked_
[i
])
783 if (this->armap_
[i
].file_offset
== last_seen_offset
)
785 this->armap_checked_
[i
] = true;
788 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
789 != this->seen_offsets_
.end())
791 this->armap_checked_
[i
] = true;
792 last_seen_offset
= this->armap_
[i
].file_offset
;
796 const char* sym_name
= (this->armap_names_
.data()
797 + this->armap_
[i
].name_offset
);
801 Archive::Should_include t
=
802 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
803 &why
, &tmpbuf
, &tmpbuflen
);
805 if (t
== Archive::SHOULD_INCLUDE_NO
806 || t
== Archive::SHOULD_INCLUDE_YES
)
807 this->armap_checked_
[i
] = true;
809 if (t
!= Archive::SHOULD_INCLUDE_YES
)
812 // We want to include this object in the link.
813 last_seen_offset
= this->armap_
[i
].file_offset
;
814 this->seen_offsets_
.insert(last_seen_offset
);
816 if (!this->include_member(symtab
, layout
, input_objects
,
817 last_seen_offset
, mapfile
, sym
,
825 added_new_object
= true;
828 while (added_new_object
);
833 input_objects
->archive_stop(this);
838 // Return whether the archive includes a member which defines the
842 Archive::defines_symbol(Symbol
* sym
) const
844 const char* symname
= sym
->name();
845 size_t symname_len
= strlen(symname
);
846 size_t armap_size
= this->armap_
.size();
847 for (size_t i
= 0; i
< armap_size
; ++i
)
849 if (this->armap_checked_
[i
])
851 const char* archive_symname
= (this->armap_names_
.data()
852 + this->armap_
[i
].name_offset
);
853 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
855 char c
= archive_symname
[symname_len
];
856 if (c
== '\0' && sym
->version() == NULL
)
860 const char* ver
= archive_symname
+ symname_len
+ 1;
863 if (sym
->version() == NULL
)
867 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
874 // Include all the archive members in the link. This is for --whole-archive.
877 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
878 Input_objects
* input_objects
, Mapfile
* mapfile
)
880 // Don't include the same archive twice. This can happen if
881 // --whole-archive is nested inside --start-group (PR gold/12163).
882 if (this->included_all_members_
)
885 this->included_all_members_
= true;
887 input_objects
->archive_start(this);
889 if (this->members_
.size() > 0)
891 std::map
<off_t
, Archive_member
>::const_iterator p
;
892 for (p
= this->members_
.begin();
893 p
!= this->members_
.end();
896 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
897 mapfile
, NULL
, "--whole-archive"))
899 ++Archive::total_members
;
904 for (Archive::const_iterator p
= this->begin();
908 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
909 mapfile
, NULL
, "--whole-archive"))
911 ++Archive::total_members
;
915 input_objects
->archive_stop(this);
920 // Return the number of members in the archive. This is only used for
924 Archive::count_members()
927 for (Archive::const_iterator p
= this->begin();
934 // Include an archive member in the link. OFF is the file offset of
935 // the member header. WHY is the reason we are including this member.
936 // Return true if we added the member or if we had an error, return
937 // false if this was the first member we tried to add from this
938 // archive and it had an incompatible format.
941 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
942 Input_objects
* input_objects
, off_t off
,
943 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
945 ++Archive::total_members_loaded
;
947 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
948 if (p
!= this->members_
.end())
950 Object
* obj
= p
->second
.obj_
;
952 Read_symbols_data
* sd
= p
->second
.sd_
;
954 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
955 if (input_objects
->add_object(obj
))
957 obj
->layout(symtab
, layout
, sd
);
958 obj
->add_symbols(symtab
, sd
, layout
);
959 this->included_member_
= true;
965 // If this is the first object we are including from this archive,
966 // and we searched for this archive, most likely because it was
967 // found via a -l option, then if the target is incompatible we want
968 // to move on to the next archive found in the search path.
969 bool unconfigured
= false;
970 bool* punconfigured
= NULL
;
971 if (!this->included_member_
&& this->searched_for())
972 punconfigured
= &unconfigured
;
974 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
977 // Return false to search for another archive, true if we found
979 return unconfigured
? false : true;
983 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
985 Pluginobj
* pluginobj
= obj
->pluginobj();
986 if (pluginobj
!= NULL
)
988 pluginobj
->add_symbols(symtab
, NULL
, layout
);
989 this->included_member_
= true;
993 if (!input_objects
->add_object(obj
))
995 // If this is an external member of a thin archive, unlock the
997 if (obj
->offset() == 0)
998 obj
->unlock(this->task_
);
1004 if (layout
->incremental_inputs() != NULL
)
1005 layout
->incremental_inputs()->report_object(obj
, 0, this, NULL
);
1006 Read_symbols_data sd
;
1007 obj
->read_symbols(&sd
);
1008 obj
->layout(symtab
, layout
, &sd
);
1009 obj
->add_symbols(symtab
, &sd
, layout
);
1012 // If this is an external member of a thin archive, unlock the file
1013 // for the next task.
1014 if (obj
->offset() == 0)
1015 obj
->unlock(this->task_
);
1017 this->included_member_
= true;
1023 // Iterate over all unused symbols, and call the visitor class V for each.
1026 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1028 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
1029 p
!= this->armap_
.end();
1032 if (this->seen_offsets_
.find(p
->file_offset
)
1033 == this->seen_offsets_
.end())
1034 v
->visit(this->armap_names_
.data() + p
->name_offset
);
1038 // Print statistical information to stderr. This is used for --stats.
1041 Archive::print_stats()
1043 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1044 program_name
, Archive::total_archives
);
1045 fprintf(stderr
, _("%s: total archive members: %u\n"),
1046 program_name
, Archive::total_members
);
1047 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1048 program_name
, Archive::total_members_loaded
);
1051 // Add_archive_symbols methods.
1053 Add_archive_symbols::~Add_archive_symbols()
1055 if (this->this_blocker_
!= NULL
)
1056 delete this->this_blocker_
;
1057 // next_blocker_ is deleted by the task associated with the next
1061 // Return whether we can add the archive symbols. We are blocked by
1062 // this_blocker_. We block next_blocker_. We also lock the file.
1065 Add_archive_symbols::is_runnable()
1067 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1068 return this->this_blocker_
;
1073 Add_archive_symbols::locks(Task_locker
* tl
)
1075 tl
->add(this, this->next_blocker_
);
1076 tl
->add(this, this->archive_
->token());
1080 Add_archive_symbols::run(Workqueue
* workqueue
)
1082 // For an incremental link, begin recording layout information.
1083 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1084 if (incremental_inputs
!= NULL
)
1086 unsigned int arg_serial
= this->input_argument_
->file().arg_serial();
1087 Script_info
* script_info
= this->input_argument_
->script_info();
1088 incremental_inputs
->report_archive_begin(this->archive_
, arg_serial
,
1092 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1093 this->input_objects_
,
1095 this->archive_
->unlock_nested_archives();
1097 this->archive_
->release();
1098 this->archive_
->clear_uncached_views();
1102 // This archive holds object files which are incompatible with
1104 Read_symbols::incompatible_warning(this->input_argument_
,
1105 this->archive_
->input_file());
1106 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1107 this->layout_
, this->dirpath_
, this->dirindex_
,
1108 this->mapfile_
, this->input_argument_
,
1109 this->input_group_
, this->next_blocker_
);
1110 delete this->archive_
;
1114 if (this->input_group_
!= NULL
)
1115 this->input_group_
->add_archive(this->archive_
);
1118 // For an incremental link, finish recording the layout information.
1119 if (incremental_inputs
!= NULL
)
1120 incremental_inputs
->report_archive_end(this->archive_
);
1122 if (!parameters
->options().has_plugins()
1123 || this->archive_
->input_file()->options().whole_archive())
1125 // We no longer need to know about this archive.
1126 delete this->archive_
;
1130 // The plugin interface may want to rescan this archive.
1131 parameters
->options().plugins()->save_archive(this->archive_
);
1134 this->archive_
= NULL
;
1138 // Class Lib_group static variables.
1139 unsigned int Lib_group::total_lib_groups
;
1140 unsigned int Lib_group::total_members
;
1141 unsigned int Lib_group::total_members_loaded
;
1143 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1144 : Library_base(task
), members_()
1146 this->members_
.resize(lib
->size());
1150 Lib_group::do_filename() const
1152 std::string
*filename
= new std::string("/group/");
1156 // Select members from the lib group and add them to the link. We walk
1157 // through the members, and check if each one up should be included.
1158 // If the object says it should be included, we do so. We have to do
1159 // this in a loop, since including one member may create new undefined
1160 // symbols which may be satisfied by other members.
1163 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1164 Input_objects
* input_objects
)
1166 ++Lib_group::total_lib_groups
;
1168 Lib_group::total_members
+= this->members_
.size();
1170 bool added_new_object
;
1173 added_new_object
= false;
1175 while (i
< this->members_
.size())
1177 const Archive_member
& member
= this->members_
[i
];
1178 Object
* obj
= member
.obj_
;
1181 // Skip files with no symbols. Plugin objects have
1182 // member.sd_ == NULL.
1184 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1186 Archive::Should_include t
= obj
->should_include_member(symtab
,
1191 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1197 this->include_member(symtab
, layout
, input_objects
, member
);
1199 added_new_object
= true;
1203 if (member
.sd_
!= NULL
)
1205 // The file must be locked in order to destroy the views
1206 // associated with it.
1207 gold_assert(obj
!= NULL
);
1208 obj
->lock(this->task_
);
1210 obj
->unlock(this->task_
);
1214 this->members_
[i
] = this->members_
.back();
1215 this->members_
.pop_back();
1218 while (added_new_object
);
1221 // Include a lib group member in the link.
1224 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1225 Input_objects
* input_objects
,
1226 const Archive_member
& member
)
1228 ++Lib_group::total_members_loaded
;
1230 Object
* obj
= member
.obj_
;
1231 gold_assert(obj
!= NULL
);
1233 Pluginobj
* pluginobj
= obj
->pluginobj();
1234 if (pluginobj
!= NULL
)
1236 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1240 Read_symbols_data
* sd
= member
.sd_
;
1241 gold_assert(sd
!= NULL
);
1242 obj
->lock(this->task_
);
1243 if (input_objects
->add_object(obj
))
1245 if (layout
->incremental_inputs() != NULL
)
1246 layout
->incremental_inputs()->report_object(obj
, member
.arg_serial_
,
1248 obj
->layout(symtab
, layout
, sd
);
1249 obj
->add_symbols(symtab
, sd
, layout
);
1252 // Unlock the file for the next task.
1253 obj
->unlock(this->task_
);
1256 // Iterate over all unused symbols, and call the visitor class V for each.
1259 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1261 // Files are removed from the members list when used, so all the
1262 // files remaining on the list are unused.
1263 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1264 p
!= this->members_
.end();
1267 Object
* obj
= p
->obj_
;
1268 obj
->for_all_global_symbols(p
->sd_
, v
);
1272 // Print statistical information to stderr. This is used for --stats.
1275 Lib_group::print_stats()
1277 fprintf(stderr
, _("%s: lib groups: %u\n"),
1278 program_name
, Lib_group::total_lib_groups
);
1279 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1280 program_name
, Lib_group::total_members
);
1281 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1282 program_name
, Lib_group::total_members_loaded
);
1286 Add_lib_group_symbols::is_runnable()
1288 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1289 return this->readsyms_blocker_
;
1290 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1291 return this->this_blocker_
;
1296 Add_lib_group_symbols::locks(Task_locker
* tl
)
1298 tl
->add(this, this->next_blocker_
);
1302 Add_lib_group_symbols::run(Workqueue
*)
1304 // For an incremental link, begin recording layout information.
1305 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1306 if (incremental_inputs
!= NULL
)
1307 incremental_inputs
->report_archive_begin(this->lib_
, 0, NULL
);
1309 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1311 if (incremental_inputs
!= NULL
)
1312 incremental_inputs
->report_archive_end(this->lib_
);
1315 Add_lib_group_symbols::~Add_lib_group_symbols()
1317 if (this->this_blocker_
!= NULL
)
1318 delete this->this_blocker_
;
1319 // next_blocker_ is deleted by the task associated with the next
1323 } // End namespace gold.