1 // archive.cc -- archive support for gold
3 // Copyright (C) 2006-2015 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 (!parameters
->options().relocatable())
143 const char* entry_sym
= parameters
->entry();
144 if (entry_sym
!= NULL
&& strcmp(sym_name
, entry_sym
) == 0)
146 *why
= "entry symbol ";
148 return Library_base::SHOULD_INCLUDE_YES
;
152 return Library_base::SHOULD_INCLUDE_UNKNOWN
;
155 // The header of an entry in the archive. This is all readable text,
156 // padded with spaces where necessary. If the contents of an archive
157 // are all text file, the entire archive is readable.
159 struct Archive::Archive_header
163 // The file modification time.
165 // The user's UID in decimal.
167 // The user's GID in decimal.
169 // The file mode in octal.
171 // The file size in decimal.
173 // The final magic code.
177 // Class Archive static variables.
178 unsigned int Archive::total_archives
;
179 unsigned int Archive::total_members
;
180 unsigned int Archive::total_members_loaded
;
184 const char Archive::armag
[sarmag
] =
186 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
189 const char Archive::armagt
[sarmag
] =
191 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
194 const char Archive::arfmag
[2] = { '`', '\n' };
196 Archive::Archive(const std::string
& name
, Input_file
* input_file
,
197 bool is_thin_archive
, Dirsearch
* dirpath
, Task
* task
)
198 : Library_base(task
), name_(name
), input_file_(input_file
), armap_(),
199 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
200 members_(), is_thin_archive_(is_thin_archive
), included_member_(false),
201 nested_archives_(), dirpath_(dirpath
), num_members_(0),
202 included_all_members_(false)
205 parameters
->options().check_excluded_libs(input_file
->found_name());
208 // Set up the archive: read the symbol map and the extended name
214 // We need to ignore empty archives.
215 if (this->input_file_
->file().filesize() == sarmag
)
218 // The first member of the archive should be the symbol table.
219 std::string armap_name
;
220 off_t header_size
= this->read_header(sarmag
, false, &armap_name
, NULL
);
221 if (header_size
== -1)
224 section_size_type armap_size
= convert_to_section_size_type(header_size
);
226 if (armap_name
.empty())
228 this->read_armap(sarmag
+ sizeof(Archive_header
), armap_size
);
229 off
= sarmag
+ sizeof(Archive_header
) + armap_size
;
231 else if (!this->input_file_
->options().whole_archive())
232 gold_error(_("%s: no archive symbol table (run ranlib)"),
233 this->name().c_str());
235 // See if there is an extended name table. We cache these views
236 // because it is likely that we will want to read the following
237 // header in the add_symbols routine.
241 header_size
= this->read_header(off
, true, &xname
, NULL
);
242 if (header_size
== -1)
245 section_size_type extended_size
= convert_to_section_size_type(header_size
);
248 const unsigned char* p
= this->get_view(off
+ sizeof(Archive_header
),
249 extended_size
, false, true);
250 const char* px
= reinterpret_cast<const char*>(p
);
251 this->extended_names_
.assign(px
, extended_size
);
253 bool preread_syms
= (parameters
->options().threads()
254 && parameters
->options().preread_archive_symbols());
255 #ifndef ENABLE_THREADS
256 preread_syms
= false;
258 if (parameters
->options().has_plugins())
259 preread_syms
= false;
262 this->read_all_symbols();
265 // Unlock any nested archives.
268 Archive::unlock_nested_archives()
270 for (Nested_archive_table::iterator p
= this->nested_archives_
.begin();
271 p
!= this->nested_archives_
.end();
274 p
->second
->unlock(this->task_
);
278 // Read the archive symbol map.
281 Archive::read_armap(off_t start
, section_size_type size
)
283 // To count the total number of archive members, we'll just count
284 // the number of times the file offset changes. Since most archives
285 // group the symbols in the armap by object, this ought to give us
286 // an accurate count.
287 off_t last_seen_offset
= -1;
289 // Read in the entire armap.
290 const unsigned char* p
= this->get_view(start
, size
, true, false);
292 // Numbers in the armap are always big-endian.
293 const elfcpp::Elf_Word
* pword
= reinterpret_cast<const elfcpp::Elf_Word
*>(p
);
294 unsigned int nsyms
= elfcpp::Swap
<32, true>::readval(pword
);
297 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
298 const char* pnames
= reinterpret_cast<const char*>(pword
+ nsyms
);
299 section_size_type names_size
=
300 reinterpret_cast<const char*>(p
) + size
- pnames
;
301 this->armap_names_
.assign(pnames
, names_size
);
303 this->armap_
.resize(nsyms
);
305 section_offset_type name_offset
= 0;
306 for (unsigned int i
= 0; i
< nsyms
; ++i
)
308 this->armap_
[i
].name_offset
= name_offset
;
309 this->armap_
[i
].file_offset
= elfcpp::Swap
<32, true>::readval(pword
);
310 name_offset
+= strlen(pnames
+ name_offset
) + 1;
312 if (this->armap_
[i
].file_offset
!= last_seen_offset
)
314 last_seen_offset
= this->armap_
[i
].file_offset
;
315 ++this->num_members_
;
319 if (static_cast<section_size_type
>(name_offset
) > names_size
)
320 gold_error(_("%s: bad archive symbol table names"),
321 this->name().c_str());
323 // This array keeps track of which symbols are for archive elements
324 // which we have already included in the link.
325 this->armap_checked_
.resize(nsyms
);
328 // Read the header of an archive member at OFF. Fail if something
329 // goes wrong. Return the size of the member. Set *PNAME to the name
333 Archive::read_header(off_t off
, bool cache
, std::string
* pname
,
336 const unsigned char* p
= this->get_view(off
, sizeof(Archive_header
), true,
338 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(p
);
339 return this->interpret_header(hdr
, off
, pname
, nested_off
);
342 // Interpret the header of HDR, the header of the archive member at
343 // file offset OFF. Return the size of the member, or -1 if something
344 // has gone wrong. Set *PNAME to the name of the member.
347 Archive::interpret_header(const Archive_header
* hdr
, off_t off
,
348 std::string
* pname
, off_t
* nested_off
) const
350 if (memcmp(hdr
->ar_fmag
, arfmag
, sizeof arfmag
) != 0)
352 gold_error(_("%s: malformed archive header at %zu"),
353 this->name().c_str(), static_cast<size_t>(off
));
357 const int size_string_size
= sizeof hdr
->ar_size
;
358 char size_string
[size_string_size
+ 1];
359 memcpy(size_string
, hdr
->ar_size
, size_string_size
);
360 char* ps
= size_string
+ size_string_size
;
361 while (ps
[-1] == ' ')
367 off_t member_size
= strtol(size_string
, &end
, 10);
370 || (member_size
== LONG_MAX
&& errno
== ERANGE
))
372 gold_error(_("%s: malformed archive header size at %zu"),
373 this->name().c_str(), static_cast<size_t>(off
));
377 if (hdr
->ar_name
[0] != '/')
379 const char* name_end
= strchr(hdr
->ar_name
, '/');
381 || name_end
- hdr
->ar_name
>= static_cast<int>(sizeof hdr
->ar_name
))
383 gold_error(_("%s: malformed archive header name at %zu"),
384 this->name().c_str(), static_cast<size_t>(off
));
387 pname
->assign(hdr
->ar_name
, name_end
- hdr
->ar_name
);
388 if (nested_off
!= NULL
)
391 else if (hdr
->ar_name
[1] == ' ')
393 // This is the symbol table.
397 else if (hdr
->ar_name
[1] == '/')
399 // This is the extended name table.
400 pname
->assign(1, '/');
405 long x
= strtol(hdr
->ar_name
+ 1, &end
, 10);
408 y
= strtol(end
+ 1, &end
, 10);
411 || (x
== LONG_MAX
&& errno
== ERANGE
)
412 || static_cast<size_t>(x
) >= this->extended_names_
.size())
414 gold_error(_("%s: bad extended name index at %zu"),
415 this->name().c_str(), static_cast<size_t>(off
));
419 const char* name
= this->extended_names_
.data() + x
;
420 const char* name_end
= strchr(name
, '\n');
421 if (static_cast<size_t>(name_end
- name
) > this->extended_names_
.size()
422 || name_end
[-1] != '/')
424 gold_error(_("%s: bad extended name entry at header %zu"),
425 this->name().c_str(), static_cast<size_t>(off
));
428 pname
->assign(name
, name_end
- 1 - name
);
429 if (nested_off
!= NULL
)
436 // An archive member iterator.
438 class Archive::const_iterator
441 // The header of an archive member. This is what this iterator
445 // The name of the member.
447 // The file offset of the member.
449 // The file offset of a nested archive member.
451 // The size of the member.
455 const_iterator(Archive
* archive
, off_t off
)
456 : archive_(archive
), off_(off
)
457 { this->read_next_header(); }
461 { return this->header_
; }
465 { return &this->header_
; }
470 if (this->off_
== this->archive_
->file().filesize())
472 this->off_
+= sizeof(Archive_header
);
473 if (!this->archive_
->is_thin_archive())
474 this->off_
+= this->header_
.size
;
475 if ((this->off_
& 1) != 0)
477 this->read_next_header();
484 const_iterator ret
= *this;
490 operator==(const const_iterator p
) const
491 { return this->off_
== p
->off
; }
494 operator!=(const const_iterator p
) const
495 { return this->off_
!= p
->off
; }
501 // The underlying archive.
503 // The current offset in the file.
505 // The current archive header.
509 // Read the next archive header.
512 Archive::const_iterator::read_next_header()
514 off_t filesize
= this->archive_
->file().filesize();
517 if (filesize
- this->off_
< static_cast<off_t
>(sizeof(Archive_header
)))
519 if (filesize
!= this->off_
)
521 gold_error(_("%s: short archive header at %zu"),
522 this->archive_
->filename().c_str(),
523 static_cast<size_t>(this->off_
));
524 this->off_
= filesize
;
526 this->header_
.off
= filesize
;
530 unsigned char buf
[sizeof(Archive_header
)];
531 this->archive_
->file().read(this->off_
, sizeof(Archive_header
), buf
);
533 const Archive_header
* hdr
= reinterpret_cast<const Archive_header
*>(buf
);
534 off_t size
= this->archive_
->interpret_header(hdr
, this->off_
,
536 &this->header_
.nested_off
);
539 this->header_
.off
= filesize
;
543 this->header_
.size
= size
;
544 this->header_
.off
= this->off_
;
546 // Skip special members.
547 if (!this->header_
.name
.empty() && this->header_
.name
!= "/")
550 this->off_
+= sizeof(Archive_header
) + this->header_
.size
;
551 if ((this->off_
& 1) != 0)
558 Archive::const_iterator
561 return Archive::const_iterator(this, sarmag
);
566 Archive::const_iterator
569 return Archive::const_iterator(this, this->input_file_
->file().filesize());
572 // Get the file and offset for an archive member, which may be an
573 // external member of a thin archive. Set *INPUT_FILE to the
574 // file containing the actual member, *MEMOFF to the offset
575 // within that file (0 if not a nested archive), and *MEMBER_NAME
576 // to the name of the archive member. Return TRUE on success.
579 Archive::get_file_and_offset(off_t off
, Input_file
** input_file
, off_t
* memoff
,
580 off_t
* memsize
, std::string
* member_name
)
584 *memsize
= this->read_header(off
, false, member_name
, &nested_off
);
588 *input_file
= this->input_file_
;
589 *memoff
= off
+ static_cast<off_t
>(sizeof(Archive_header
));
591 if (!this->is_thin_archive_
)
594 // Adjust a relative pathname so that it is relative
595 // to the directory containing the archive.
596 if (!IS_ABSOLUTE_PATH(member_name
->c_str()))
598 const char* arch_path
= this->filename().c_str();
599 const char* basename
= lbasename(arch_path
);
600 if (basename
> arch_path
)
601 member_name
->replace(0, 0,
602 this->filename().substr(0, basename
- arch_path
));
607 // This is a member of a nested archive. Open the containing
608 // archive if we don't already have it open, then do a recursive
609 // call to include the member from that archive.
611 Nested_archive_table::const_iterator p
=
612 this->nested_archives_
.find(*member_name
);
613 if (p
!= this->nested_archives_
.end())
617 Input_file_argument
* input_file_arg
=
618 new Input_file_argument(member_name
->c_str(),
619 Input_file_argument::INPUT_FILE_TYPE_FILE
,
620 "", false, parameters
->options());
621 *input_file
= new Input_file(input_file_arg
);
623 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
625 arch
= new Archive(*member_name
, *input_file
, false, this->dirpath_
,
628 std::pair
<Nested_archive_table::iterator
, bool> ins
=
629 this->nested_archives_
.insert(std::make_pair(*member_name
, arch
));
630 gold_assert(ins
.second
);
632 return arch
->get_file_and_offset(nested_off
, input_file
, memoff
,
633 memsize
, member_name
);
636 // This is an external member of a thin archive. Open the
637 // file as a regular relocatable object file.
638 Input_file_argument
* input_file_arg
=
639 new Input_file_argument(member_name
->c_str(),
640 Input_file_argument::INPUT_FILE_TYPE_FILE
,
641 "", false, this->input_file_
->options());
642 *input_file
= new Input_file(input_file_arg
);
644 if (!(*input_file
)->open(*this->dirpath_
, this->task_
, &dummy
))
648 *memsize
= (*input_file
)->file().filesize();
652 // Return an ELF object for the member at offset OFF. If
653 // PUNCONFIGURED is not NULL, then if the ELF object has an
654 // unsupported target type, set *PUNCONFIGURED to true and return
658 Archive::get_elf_object_for_member(off_t off
, bool* punconfigured
)
660 if (punconfigured
!= NULL
)
661 *punconfigured
= false;
663 Input_file
* input_file
;
666 std::string member_name
;
667 if (!this->get_file_and_offset(off
, &input_file
, &memoff
, &memsize
,
671 const unsigned char* ehdr
;
674 bool is_elf_obj
= false;
676 if (is_elf_object(input_file
, memoff
, &ehdr
, &read_size
))
678 obj
= make_elf_object((std::string(this->input_file_
->filename())
679 + "(" + member_name
+ ")"),
680 input_file
, memoff
, ehdr
, read_size
,
685 if (parameters
->options().has_plugins())
688 = parameters
->options().plugins()->claim_file(input_file
,
692 if (plugin_obj
!= NULL
)
694 // The input file was claimed by a plugin, and its symbols
695 // have been provided by the plugin.
696 // Delete its elf object.
705 gold_error(_("%s: member at %zu is not an ELF object"),
706 this->name().c_str(), static_cast<size_t>(off
));
712 obj
->set_no_export(this->no_export());
716 // Read the symbols from all the archive members in the link.
719 Archive::read_all_symbols()
721 for (Archive::const_iterator p
= this->begin();
724 this->read_symbols(p
->off
);
727 // Read the symbols from an archive member in the link. OFF is the file
728 // offset of the member header.
731 Archive::read_symbols(off_t off
)
733 Object
* obj
= this->get_elf_object_for_member(off
, NULL
);
737 Read_symbols_data
* sd
= new Read_symbols_data
;
738 obj
->read_symbols(sd
);
739 Archive_member
member(obj
, sd
);
740 this->members_
[off
] = member
;
743 // Select members from the archive and add them to the link. We walk
744 // through the elements in the archive map, and look each one up in
745 // the symbol table. If it exists as a strong undefined symbol, we
746 // pull in the corresponding element. We have to do this in a loop,
747 // since pulling in one element may create new undefined symbols which
748 // may be satisfied by other objects in the archive. Return true in
749 // the normal case, false if the first member we tried to add from
750 // this archive had an incompatible target.
753 Archive::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
754 Input_objects
* input_objects
, Mapfile
* mapfile
)
756 ++Archive::total_archives
;
758 if (this->input_file_
->options().whole_archive())
759 return this->include_all_members(symtab
, layout
, input_objects
,
762 Archive::total_members
+= this->num_members_
;
764 input_objects
->archive_start(this);
766 const size_t armap_size
= this->armap_
.size();
768 // This is a quick optimization, since we usually see many symbols
769 // in a row with the same offset. last_seen_offset holds the last
770 // offset we saw that was present in the seen_offsets_ set.
771 off_t last_seen_offset
= -1;
773 // Track which symbols in the symbol table we've already found to be
777 size_t tmpbuflen
= 0;
778 bool added_new_object
;
781 added_new_object
= false;
782 for (size_t i
= 0; i
< armap_size
; ++i
)
784 if (this->armap_checked_
[i
])
786 if (this->armap_
[i
].file_offset
== last_seen_offset
)
788 this->armap_checked_
[i
] = true;
791 if (this->seen_offsets_
.find(this->armap_
[i
].file_offset
)
792 != this->seen_offsets_
.end())
794 this->armap_checked_
[i
] = true;
795 last_seen_offset
= this->armap_
[i
].file_offset
;
799 const char* sym_name
= (this->armap_names_
.data()
800 + this->armap_
[i
].name_offset
);
804 Archive::Should_include t
=
805 Archive::should_include_member(symtab
, layout
, sym_name
, &sym
,
806 &why
, &tmpbuf
, &tmpbuflen
);
808 if (t
== Archive::SHOULD_INCLUDE_NO
809 || t
== Archive::SHOULD_INCLUDE_YES
)
810 this->armap_checked_
[i
] = true;
812 if (t
!= Archive::SHOULD_INCLUDE_YES
)
815 // We want to include this object in the link.
816 last_seen_offset
= this->armap_
[i
].file_offset
;
817 this->seen_offsets_
.insert(last_seen_offset
);
819 if (!this->include_member(symtab
, layout
, input_objects
,
820 last_seen_offset
, mapfile
, sym
,
828 added_new_object
= true;
831 while (added_new_object
);
836 input_objects
->archive_stop(this);
841 // Return whether the archive includes a member which defines the
845 Archive::defines_symbol(Symbol
* sym
) const
847 const char* symname
= sym
->name();
848 size_t symname_len
= strlen(symname
);
849 size_t armap_size
= this->armap_
.size();
850 for (size_t i
= 0; i
< armap_size
; ++i
)
852 if (this->armap_checked_
[i
])
854 const char* archive_symname
= (this->armap_names_
.data()
855 + this->armap_
[i
].name_offset
);
856 if (strncmp(archive_symname
, symname
, symname_len
) != 0)
858 char c
= archive_symname
[symname_len
];
859 if (c
== '\0' && sym
->version() == NULL
)
863 const char* ver
= archive_symname
+ symname_len
+ 1;
866 if (sym
->version() == NULL
)
870 if (sym
->version() != NULL
&& strcmp(sym
->version(), ver
) == 0)
877 // Include all the archive members in the link. This is for --whole-archive.
880 Archive::include_all_members(Symbol_table
* symtab
, Layout
* layout
,
881 Input_objects
* input_objects
, Mapfile
* mapfile
)
883 // Don't include the same archive twice. This can happen if
884 // --whole-archive is nested inside --start-group (PR gold/12163).
885 if (this->included_all_members_
)
888 this->included_all_members_
= true;
890 input_objects
->archive_start(this);
892 if (this->members_
.size() > 0)
894 std::map
<off_t
, Archive_member
>::const_iterator p
;
895 for (p
= this->members_
.begin();
896 p
!= this->members_
.end();
899 if (!this->include_member(symtab
, layout
, input_objects
, p
->first
,
900 mapfile
, NULL
, "--whole-archive"))
902 ++Archive::total_members
;
907 for (Archive::const_iterator p
= this->begin();
911 if (!this->include_member(symtab
, layout
, input_objects
, p
->off
,
912 mapfile
, NULL
, "--whole-archive"))
914 ++Archive::total_members
;
918 input_objects
->archive_stop(this);
923 // Return the number of members in the archive. This is only used for
927 Archive::count_members()
930 for (Archive::const_iterator p
= this->begin();
937 // RAII class to ensure we unlock the object if it's a member of a
938 // thin archive. We can't use Task_lock_obj in Archive::include_member
939 // because the object file is already locked when it's opened by
940 // get_elf_object_for_member.
942 class Thin_archive_object_unlocker
945 Thin_archive_object_unlocker(const Task
*task
, Object
* obj
)
946 : task_(task
), obj_(obj
)
949 ~Thin_archive_object_unlocker()
951 if (this->obj_
->offset() == 0)
952 this->obj_
->unlock(this->task_
);
956 Thin_archive_object_unlocker(const Thin_archive_object_unlocker
&);
957 Thin_archive_object_unlocker
& operator=(const Thin_archive_object_unlocker
&);
963 // Include an archive member in the link. OFF is the file offset of
964 // the member header. WHY is the reason we are including this member.
965 // Return true if we added the member or if we had an error, return
966 // false if this was the first member we tried to add from this
967 // archive and it had an incompatible format.
970 Archive::include_member(Symbol_table
* symtab
, Layout
* layout
,
971 Input_objects
* input_objects
, off_t off
,
972 Mapfile
* mapfile
, Symbol
* sym
, const char* why
)
974 ++Archive::total_members_loaded
;
976 std::map
<off_t
, Archive_member
>::const_iterator p
= this->members_
.find(off
);
977 if (p
!= this->members_
.end())
979 Object
* obj
= p
->second
.obj_
;
981 Read_symbols_data
* sd
= p
->second
.sd_
;
983 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
984 if (input_objects
->add_object(obj
))
986 obj
->layout(symtab
, layout
, sd
);
987 obj
->add_symbols(symtab
, sd
, layout
);
988 this->included_member_
= true;
994 // If this is the first object we are including from this archive,
995 // and we searched for this archive, most likely because it was
996 // found via a -l option, then if the target is incompatible we want
997 // to move on to the next archive found in the search path.
998 bool unconfigured
= false;
999 bool* punconfigured
= NULL
;
1000 if (!this->included_member_
&& this->searched_for())
1001 punconfigured
= &unconfigured
;
1003 Object
* obj
= this->get_elf_object_for_member(off
, punconfigured
);
1006 // Return false to search for another archive, true if we found
1008 return unconfigured
? false : true;
1011 // If the object is an external member of a thin archive,
1012 // unlock it when we're done here.
1013 Thin_archive_object_unlocker
unlocker(this->task_
, obj
);
1015 if (mapfile
!= NULL
)
1016 mapfile
->report_include_archive_member(obj
->name(), sym
, why
);
1018 Pluginobj
* pluginobj
= obj
->pluginobj();
1019 if (pluginobj
!= NULL
)
1021 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1022 this->included_member_
= true;
1026 if (!input_objects
->add_object(obj
))
1032 if (layout
->incremental_inputs() != NULL
)
1033 layout
->incremental_inputs()->report_object(obj
, 0, this, NULL
);
1036 Read_symbols_data sd
;
1037 obj
->read_symbols(&sd
);
1038 obj
->layout(symtab
, layout
, &sd
);
1039 obj
->add_symbols(symtab
, &sd
, layout
);
1042 this->included_member_
= true;
1046 // Iterate over all unused symbols, and call the visitor class V for each.
1049 Archive::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1051 for (std::vector
<Armap_entry
>::const_iterator p
= this->armap_
.begin();
1052 p
!= this->armap_
.end();
1055 if (this->seen_offsets_
.find(p
->file_offset
)
1056 == this->seen_offsets_
.end())
1057 v
->visit(this->armap_names_
.data() + p
->name_offset
);
1061 // Print statistical information to stderr. This is used for --stats.
1064 Archive::print_stats()
1066 fprintf(stderr
, _("%s: archive libraries: %u\n"),
1067 program_name
, Archive::total_archives
);
1068 fprintf(stderr
, _("%s: total archive members: %u\n"),
1069 program_name
, Archive::total_members
);
1070 fprintf(stderr
, _("%s: loaded archive members: %u\n"),
1071 program_name
, Archive::total_members_loaded
);
1074 // Add_archive_symbols methods.
1076 Add_archive_symbols::~Add_archive_symbols()
1078 if (this->this_blocker_
!= NULL
)
1079 delete this->this_blocker_
;
1080 // next_blocker_ is deleted by the task associated with the next
1084 // Return whether we can add the archive symbols. We are blocked by
1085 // this_blocker_. We block next_blocker_. We also lock the file.
1088 Add_archive_symbols::is_runnable()
1090 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1091 return this->this_blocker_
;
1096 Add_archive_symbols::locks(Task_locker
* tl
)
1098 tl
->add(this, this->next_blocker_
);
1099 tl
->add(this, this->archive_
->token());
1103 Add_archive_symbols::run(Workqueue
* workqueue
)
1105 // For an incremental link, begin recording layout information.
1106 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1107 if (incremental_inputs
!= NULL
)
1109 unsigned int arg_serial
= this->input_argument_
->file().arg_serial();
1110 Script_info
* script_info
= this->input_argument_
->script_info();
1111 incremental_inputs
->report_archive_begin(this->archive_
, arg_serial
,
1115 bool added
= this->archive_
->add_symbols(this->symtab_
, this->layout_
,
1116 this->input_objects_
,
1118 this->archive_
->unlock_nested_archives();
1120 this->archive_
->release();
1121 this->archive_
->clear_uncached_views();
1125 // This archive holds object files which are incompatible with
1127 Read_symbols::incompatible_warning(this->input_argument_
,
1128 this->archive_
->input_file());
1129 Read_symbols::requeue(workqueue
, this->input_objects_
, this->symtab_
,
1130 this->layout_
, this->dirpath_
, this->dirindex_
,
1131 this->mapfile_
, this->input_argument_
,
1132 this->input_group_
, this->next_blocker_
);
1133 delete this->archive_
;
1137 if (this->input_group_
!= NULL
)
1138 this->input_group_
->add_archive(this->archive_
);
1141 // For an incremental link, finish recording the layout information.
1142 if (incremental_inputs
!= NULL
)
1143 incremental_inputs
->report_archive_end(this->archive_
);
1145 if (!parameters
->options().has_plugins()
1146 || this->archive_
->input_file()->options().whole_archive())
1148 // We no longer need to know about this archive.
1149 delete this->archive_
;
1153 // The plugin interface may want to rescan this archive.
1154 parameters
->options().plugins()->save_archive(this->archive_
);
1157 this->archive_
= NULL
;
1161 // Class Lib_group static variables.
1162 unsigned int Lib_group::total_lib_groups
;
1163 unsigned int Lib_group::total_members
;
1164 unsigned int Lib_group::total_members_loaded
;
1166 Lib_group::Lib_group(const Input_file_lib
* lib
, Task
* task
)
1167 : Library_base(task
), members_()
1169 this->members_
.resize(lib
->size());
1173 Lib_group::do_filename() const
1175 std::string
*filename
= new std::string("/group/");
1179 // Select members from the lib group and add them to the link. We walk
1180 // through the members, and check if each one up should be included.
1181 // If the object says it should be included, we do so. We have to do
1182 // this in a loop, since including one member may create new undefined
1183 // symbols which may be satisfied by other members.
1186 Lib_group::add_symbols(Symbol_table
* symtab
, Layout
* layout
,
1187 Input_objects
* input_objects
)
1189 ++Lib_group::total_lib_groups
;
1191 Lib_group::total_members
+= this->members_
.size();
1193 bool added_new_object
;
1196 added_new_object
= false;
1198 while (i
< this->members_
.size())
1200 const Archive_member
& member
= this->members_
[i
];
1201 Object
* obj
= member
.obj_
;
1204 // Skip files with no symbols. Plugin objects have
1205 // member.sd_ == NULL.
1207 && (member
.sd_
== NULL
|| member
.sd_
->symbol_names
!= NULL
))
1209 Archive::Should_include t
= obj
->should_include_member(symtab
,
1214 if (t
!= Archive::SHOULD_INCLUDE_YES
)
1220 this->include_member(symtab
, layout
, input_objects
, member
);
1222 added_new_object
= true;
1226 if (member
.sd_
!= NULL
)
1228 // The file must be locked in order to destroy the views
1229 // associated with it.
1230 gold_assert(obj
!= NULL
);
1231 obj
->lock(this->task_
);
1233 obj
->unlock(this->task_
);
1237 this->members_
[i
] = this->members_
.back();
1238 this->members_
.pop_back();
1241 while (added_new_object
);
1244 // Include a lib group member in the link.
1247 Lib_group::include_member(Symbol_table
* symtab
, Layout
* layout
,
1248 Input_objects
* input_objects
,
1249 const Archive_member
& member
)
1251 ++Lib_group::total_members_loaded
;
1253 Object
* obj
= member
.obj_
;
1254 gold_assert(obj
!= NULL
);
1256 Pluginobj
* pluginobj
= obj
->pluginobj();
1257 if (pluginobj
!= NULL
)
1259 pluginobj
->add_symbols(symtab
, NULL
, layout
);
1263 Read_symbols_data
* sd
= member
.sd_
;
1264 gold_assert(sd
!= NULL
);
1265 obj
->lock(this->task_
);
1266 if (input_objects
->add_object(obj
))
1268 if (layout
->incremental_inputs() != NULL
)
1269 layout
->incremental_inputs()->report_object(obj
, member
.arg_serial_
,
1271 obj
->layout(symtab
, layout
, sd
);
1272 obj
->add_symbols(symtab
, sd
, layout
);
1275 // Unlock the file for the next task.
1276 obj
->unlock(this->task_
);
1279 // Iterate over all unused symbols, and call the visitor class V for each.
1282 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
1284 // Files are removed from the members list when used, so all the
1285 // files remaining on the list are unused.
1286 for (std::vector
<Archive_member
>::const_iterator p
= this->members_
.begin();
1287 p
!= this->members_
.end();
1290 Object
* obj
= p
->obj_
;
1291 obj
->for_all_global_symbols(p
->sd_
, v
);
1295 // Print statistical information to stderr. This is used for --stats.
1298 Lib_group::print_stats()
1300 fprintf(stderr
, _("%s: lib groups: %u\n"),
1301 program_name
, Lib_group::total_lib_groups
);
1302 fprintf(stderr
, _("%s: total lib groups members: %u\n"),
1303 program_name
, Lib_group::total_members
);
1304 fprintf(stderr
, _("%s: loaded lib groups members: %u\n"),
1305 program_name
, Lib_group::total_members_loaded
);
1309 Add_lib_group_symbols::is_runnable()
1311 if (this->readsyms_blocker_
!= NULL
&& this->readsyms_blocker_
->is_blocked())
1312 return this->readsyms_blocker_
;
1313 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1314 return this->this_blocker_
;
1319 Add_lib_group_symbols::locks(Task_locker
* tl
)
1321 tl
->add(this, this->next_blocker_
);
1325 Add_lib_group_symbols::run(Workqueue
*)
1327 // For an incremental link, begin recording layout information.
1328 Incremental_inputs
* incremental_inputs
= this->layout_
->incremental_inputs();
1329 if (incremental_inputs
!= NULL
)
1330 incremental_inputs
->report_archive_begin(this->lib_
, 0, NULL
);
1332 this->lib_
->add_symbols(this->symtab_
, this->layout_
, this->input_objects_
);
1334 if (incremental_inputs
!= NULL
)
1335 incremental_inputs
->report_archive_end(this->lib_
);
1338 Add_lib_group_symbols::~Add_lib_group_symbols()
1340 if (this->this_blocker_
!= NULL
)
1341 delete this->this_blocker_
;
1342 // next_blocker_ is deleted by the task associated with the next
1346 } // End namespace gold.