1 // dwp.cc -- DWARF packaging utility
3 // Copyright 2012 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of dwp, the DWARF packaging utility.
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.
36 #include "libiberty.h"
37 #include "../bfd/bfdver.h"
40 #include "elfcpp_file.h"
42 #include "dirsearch.h"
45 #include "compressed_output.h"
46 #include "stringpool.h"
47 #include "dwarf_reader.h"
50 usage(FILE* fd
, int) ATTRIBUTE_NORETURN
;
53 print_version() ATTRIBUTE_NORETURN
;
57 class Dwp_output_file
;
59 template <int size
, bool big_endian
>
60 class Sized_relobj_dwo
;
62 // List of .dwo files to process.
65 Dwo_file_entry(uint64_t id
, std::string name
)
66 : dwo_id(id
), dwo_name(name
)
71 typedef std::vector
<Dwo_file_entry
> File_list
;
73 // Type to hold the offset and length of an input section
74 // within an output section.
78 section_offset_type offset
;
79 section_size_type size
;
85 Section_bounds(section_offset_type o
, section_size_type s
)
90 // A set of sections for a compilation unit or type unit.
95 Section_bounds sections
[elfcpp::DW_SECT_MAX
+ 1];
98 : signature(0), sections()
103 // This class may represent a .dwo file, a .dwp file
104 // produced by an earlier run, or an executable file whose
105 // debug section identifies a set of .dwo files to read.
110 Dwo_file(const char* name
)
111 : name_(name
), obj_(NULL
), input_file_(NULL
), is_compressed_(),
112 sect_offsets_(), str_offset_map_()
117 // Read the input executable file and extract the list of .dwo files
118 // that it references.
120 read_executable(File_list
* files
);
122 // Read the input file and send its contents to OUTPUT_FILE.
124 read(Dwp_output_file
* output_file
);
126 // Verify a .dwp file given a list of .dwo files referenced by the
127 // corresponding executable file. Returns true if no problems
130 verify(const File_list
& files
);
133 // Types for mapping input string offsets to output string offsets.
134 typedef std::pair
<section_offset_type
, section_offset_type
>
135 Str_offset_map_entry
;
136 typedef std::vector
<Str_offset_map_entry
> Str_offset_map
;
138 // A less-than comparison routine for Str_offset_map.
139 struct Offset_compare
142 operator()(const Str_offset_map_entry
& i1
,
143 const Str_offset_map_entry
& i2
) const
144 { return i1
.first
< i2
.first
; }
147 // Create a Sized_relobj_dwo of the given size and endianness,
148 // and record the target info. P is a pointer to the ELF header
151 make_object(Dwp_output_file
* output_file
);
153 template <int size
, bool big_endian
>
155 sized_make_object(const unsigned char* p
, Input_file
* input_file
,
156 Dwp_output_file
* output_file
);
158 // Return the number of sections in the input object file.
161 { return this->obj_
->shnum(); }
163 // Return section type.
165 section_type(unsigned int shndx
)
166 { return this->obj_
->section_type(shndx
); }
168 // Get the name of a section.
170 section_name(unsigned int shndx
)
171 { return this->obj_
->section_name(shndx
); }
173 // Return a view of the contents of a section, decompressed if necessary.
174 // Set *PLEN to the size. Set *IS_NEW to true if the contents need to be
175 // deleted by the caller.
177 section_contents(unsigned int shndx
, section_size_type
* plen
, bool* is_new
)
178 { return this->obj_
->decompressed_section_contents(shndx
, plen
, is_new
); }
180 // Read the .debug_cu_index or .debug_tu_index section of a .dwp file,
181 // and process the CU or TU sets.
183 read_unit_index(unsigned int, unsigned int *, Dwp_output_file
*,
186 template <bool big_endian
>
188 sized_read_unit_index(unsigned int, unsigned int *, Dwp_output_file
*,
191 // Verify the .debug_cu_index section of a .dwp file, comparing it
192 // against the list of .dwo files referenced by the corresponding
195 verify_dwo_list(unsigned int, const File_list
& files
);
197 template <bool big_endian
>
199 sized_verify_dwo_list(unsigned int, const File_list
& files
);
201 // Merge the input string table section into the output file.
203 add_strings(Dwp_output_file
*, unsigned int);
205 // Copy a section from the input file to the output file.
207 copy_section(Dwp_output_file
* output_file
, unsigned int shndx
,
208 elfcpp::DW_SECT section_id
);
210 // Remap the string offsets in the .debug_str_offsets.dwo section.
212 remap_str_offsets(const unsigned char* contents
, section_size_type len
);
214 template <bool big_endian
>
216 sized_remap_str_offsets(const unsigned char* contents
, section_size_type len
);
218 // Remap a single string offsets from an offset in the input string table
219 // to an offset in the output string table.
221 remap_str_offset(section_offset_type val
);
223 // Add a set of .debug_info.dwo or .debug_types.dwo and related sections
226 add_unit_set(Dwp_output_file
* output_file
, unsigned int *debug_shndx
,
227 bool is_debug_types
);
231 // The ELF file, represented as a gold Relobj instance.
233 // The Input_file object.
234 Input_file
* input_file_
;
235 // Flags indicating which sections are compressed.
236 std::vector
<bool> is_compressed_
;
237 // Map input section index onto output section offset and size.
238 std::vector
<Section_bounds
> sect_offsets_
;
239 // Map input string offsets to output string offsets.
240 Str_offset_map str_offset_map_
;
243 // An ELF input file.
244 // We derive from Sized_relobj so that we can use interfaces
245 // in libgold to access the file.
247 template <int size
, bool big_endian
>
248 class Sized_relobj_dwo
: public Sized_relobj
<size
, big_endian
>
251 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
252 typedef typename Sized_relobj
<size
, big_endian
>::Symbols Symbols
;
254 Sized_relobj_dwo(const char* name
, Input_file
* input_file
,
255 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
256 : Sized_relobj
<size
, big_endian
>(name
, input_file
),
257 elf_file_(this, ehdr
)
263 // Setup the section information.
268 // Return section type.
270 do_section_type(unsigned int shndx
)
271 { return this->elf_file_
.section_type(shndx
); }
273 // Get the name of a section.
275 do_section_name(unsigned int shndx
)
276 { return this->elf_file_
.section_name(shndx
); }
278 // Get the size of a section.
280 do_section_size(unsigned int shndx
)
281 { return this->elf_file_
.section_size(shndx
); }
283 // Return a view of the contents of a section.
285 do_section_contents(unsigned int, section_size_type
*, bool);
287 // Return a view of the uncompressed contents of a section. Set *PLEN
288 // to the size. Set *IS_NEW to true if the contents need to be deleted
291 do_decompressed_section_contents(unsigned int shndx
,
292 section_size_type
* plen
,
295 // The following virtual functions are abstract in the base classes,
296 // but are not used here.
300 do_read_symbols(Read_symbols_data
*)
301 { gold_unreachable(); }
303 // Lay out the input sections.
305 do_layout(Symbol_table
*, Layout
*, Read_symbols_data
*)
306 { gold_unreachable(); }
308 // Layout sections whose layout was deferred while waiting for
309 // input files from a plugin.
311 do_layout_deferred_sections(Layout
*)
312 { gold_unreachable(); }
314 // Add the symbols to the symbol table.
316 do_add_symbols(Symbol_table
*, Read_symbols_data
*, Layout
*)
317 { gold_unreachable(); }
319 Archive::Should_include
320 do_should_include_member(Symbol_table
*, Layout
*, Read_symbols_data
*,
322 { gold_unreachable(); }
324 // Iterate over global symbols, calling a visitor class V for each.
326 do_for_all_global_symbols(Read_symbols_data
*,
327 Library_base::Symbol_visitor_base
*)
328 { gold_unreachable(); }
330 // Return section flags.
332 do_section_flags(unsigned int)
333 { gold_unreachable(); }
335 // Return section entsize.
337 do_section_entsize(unsigned int)
338 { gold_unreachable(); }
340 // Return section address.
342 do_section_address(unsigned int)
343 { gold_unreachable(); }
345 // Return the section link field.
347 do_section_link(unsigned int)
348 { gold_unreachable(); }
350 // Return the section link field.
352 do_section_info(unsigned int)
353 { gold_unreachable(); }
355 // Return the section alignment.
357 do_section_addralign(unsigned int)
358 { gold_unreachable(); }
360 // Return the Xindex structure to use.
362 do_initialize_xindex()
363 { gold_unreachable(); }
365 // Get symbol counts.
367 do_get_global_symbol_counts(const Symbol_table
*, size_t*, size_t*) const
368 { gold_unreachable(); }
370 // Get global symbols.
372 do_get_global_symbols() const
375 // Return the value of a local symbol.
377 do_local_symbol_value(unsigned int, uint64_t) const
378 { gold_unreachable(); }
381 do_local_plt_offset(unsigned int) const
382 { gold_unreachable(); }
384 // Return whether local symbol SYMNDX is a TLS symbol.
386 do_local_is_tls(unsigned int) const
387 { gold_unreachable(); }
389 // Return the number of local symbols.
391 do_local_symbol_count() const
392 { gold_unreachable(); }
394 // Return the number of local symbols in the output symbol table.
396 do_output_local_symbol_count() const
397 { gold_unreachable(); }
399 // Return the file offset for local symbols in the output symbol table.
401 do_local_symbol_offset() const
402 { gold_unreachable(); }
406 do_read_relocs(Read_relocs_data
*)
407 { gold_unreachable(); }
409 // Process the relocs to find list of referenced sections. Used only
410 // during garbage collection.
412 do_gc_process_relocs(Symbol_table
*, Layout
*, Read_relocs_data
*)
413 { gold_unreachable(); }
415 // Scan the relocs and adjust the symbol table.
417 do_scan_relocs(Symbol_table
*, Layout
*, Read_relocs_data
*)
418 { gold_unreachable(); }
420 // Count the local symbols.
422 do_count_local_symbols(Stringpool_template
<char>*,
423 Stringpool_template
<char>*)
424 { gold_unreachable(); }
426 // Finalize the local symbols.
428 do_finalize_local_symbols(unsigned int, off_t
, Symbol_table
*)
429 { gold_unreachable(); }
431 // Set the offset where local dynamic symbol information will be stored.
433 do_set_local_dynsym_indexes(unsigned int)
434 { gold_unreachable(); }
436 // Set the offset where local dynamic symbol information will be stored.
438 do_set_local_dynsym_offset(off_t
)
439 { gold_unreachable(); }
441 // Relocate the input sections and write out the local symbols.
443 do_relocate(const Symbol_table
*, const Layout
*, Output_file
*)
444 { gold_unreachable(); }
447 // General access to the ELF file.
448 elfcpp::Elf_file
<size
, big_endian
, Object
> elf_file_
;
452 // This class is responsible for collecting the debug index information
453 // and writing the .dwp file in ELF format.
455 class Dwp_output_file
458 Dwp_output_file(const char* name
)
459 : name_(name
), machine_(0), size_(0), big_endian_(false), osabi_(0),
460 abiversion_(0), fd_(NULL
), next_file_offset_(0), shnum_(1), sections_(),
461 section_id_map_(), shoff_(0), shstrndx_(0), have_strings_(false),
462 stringpool_(), shstrtab_(), cu_index_(), tu_index_(), last_type_sig_(0),
465 this->section_id_map_
.resize(elfcpp::DW_SECT_MAX
+ 1);
466 this->stringpool_
.set_no_zero_null();
469 // Record the target info from an input file.
471 record_target_info(const char* name
, int machine
, int size
, bool big_endian
,
472 int osabi
, int abiversion
);
474 // Add a string to the debug strings section.
476 add_string(const char* str
, size_t len
);
478 // Add a section to the output file, and return the new section offset.
480 add_contribution(elfcpp::DW_SECT section_id
, const unsigned char* contents
,
481 section_size_type len
, int align
);
483 // Add a set of .debug_info and related sections to the output file.
485 add_cu_set(Unit_set
* cu_set
);
487 // Lookup a type signature and return TRUE if we have already seen it.
489 lookup_tu(uint64_t type_sig
);
491 // Add a set of .debug_types and related sections to the output file.
493 add_tu_set(Unit_set
* tu_set
);
495 // Finalize the file, write the string tables and index sections,
496 // and close the file.
501 // Contributions to output sections.
504 section_offset_type output_offset
;
505 section_size_type size
;
506 const unsigned char* contents
;
509 // Sections in the output file.
514 section_size_type size
;
516 std::vector
<Contribution
> contributions
;
518 Section(const char* n
, int a
)
519 : name(n
), offset(0), size(0), align(a
), contributions()
523 // The index sections defined by the DWARF Package File Format spec.
527 // Vector for the section table.
528 typedef std::vector
<const Unit_set
*> Section_table
;
531 : capacity_(0), used_(0), hash_table_(NULL
), section_table_(),
538 // Find a slot in the hash table for SIGNATURE. Return TRUE
539 // if the entry already exists.
541 find_or_add(uint64_t signature
, unsigned int* slotp
);
543 // Enter a CU or TU set at the given SLOT in the hash table.
545 enter_set(unsigned int slot
, const Unit_set
* set
);
547 // Return the contents of the given SLOT in the hash table of signatures.
549 hash_table(unsigned int slot
) const
550 { return this->hash_table_
[slot
]; }
552 // Return the contents of the given SLOT in the parallel table of
553 // shndx pool indexes.
555 index_table(unsigned int slot
) const
556 { return this->index_table_
[slot
]; }
558 // Return the total number of slots in the hash table.
560 hash_table_total_slots() const
561 { return this->capacity_
; }
563 // Return the number of used slots in the hash table.
565 hash_table_used_slots() const
566 { return this->used_
; }
568 // Return an iterator into the shndx pool.
569 Section_table::const_iterator
570 section_table() const
571 { return this->section_table_
.begin(); }
573 Section_table::const_iterator
574 section_table_end() const
575 { return this->section_table_
.end(); }
577 // Return the number of rows in the section table.
579 section_table_rows() const
580 { return this->section_table_
.size(); }
582 // Return the mask indicating which columns will be used
583 // in the section table.
585 section_table_cols() const
586 { return this->section_mask_
; }
589 // Initialize the hash table.
593 // Grow the hash table when we reach 2/3 capacity.
597 // The number of slots in the table, a power of 2 such that
598 // capacity > 3 * size / 2.
599 unsigned int capacity_
;
600 // The current number of used slots in the hash table.
602 // The storage for the hash table of signatures.
603 uint64_t* hash_table_
;
604 // The storage for the parallel table of shndx pool indexes.
605 uint32_t* index_table_
;
606 // The table of section offsets and sizes.
607 Section_table section_table_
;
608 // Bit mask to indicate which debug sections are present in the file.
610 }; // End class Dwp_output_file::Dwp_index.
612 // Add a new output section and return the section index.
614 add_output_section(const char* section_name
, int align
);
616 // Write a new section to the output file.
618 write_new_section(const char* section_name
, const unsigned char* contents
,
619 section_size_type len
, int align
);
621 // Write the ELF header.
625 template<unsigned int size
, bool big_endian
>
629 // Write a section header.
631 write_shdr(const char* name
, unsigned int type
, unsigned int flags
,
632 uint64_t addr
, off_t offset
, section_size_type sect_size
,
633 unsigned int link
, unsigned int info
,
634 unsigned int align
, unsigned int ent_size
);
636 template<unsigned int size
, bool big_endian
>
638 sized_write_shdr(const char* name
, unsigned int type
, unsigned int flags
,
639 uint64_t addr
, off_t offset
, section_size_type sect_size
,
640 unsigned int link
, unsigned int info
,
641 unsigned int align
, unsigned int ent_size
);
643 // Write the contributions to an output section.
645 write_contributions(const Section
& sect
);
647 // Write a CU or TU index section.
648 template<bool big_endian
>
650 write_index(const char* sect_name
, const Dwp_index
& index
);
652 // The output filename.
654 // ELF header parameters.
660 // The output file descriptor.
662 // Next available file offset.
663 off_t next_file_offset_
;
664 // The number of sections.
666 // Section table. The first entry is shndx 1.
667 std::vector
<Section
> sections_
;
668 // Section id map. This maps a DW_SECT enum to an shndx.
669 std::vector
<unsigned int> section_id_map_
;
670 // File offset of the section header table.
672 // Section index of the section string table.
673 unsigned int shstrndx_
;
674 // TRUE if we have added any strings to the string pool.
676 // String pool for the output .debug_str.dwo section.
677 Stringpool stringpool_
;
678 // String pool for the .shstrtab section.
679 Stringpool shstrtab_
;
680 // The compilation unit index.
682 // The type unit index.
684 // Cache of the last type signature looked up.
685 uint64_t last_type_sig_
;
686 // Cache of the slot index for the last type signature.
687 unsigned int last_tu_slot_
;
690 // A specialization of Dwarf_info_reader, for reading dwo_names from
693 class Dwo_name_info_reader
: public Dwarf_info_reader
696 Dwo_name_info_reader(Relobj
* object
, unsigned int shndx
)
697 : Dwarf_info_reader(false, object
, NULL
, 0, shndx
, 0, 0),
701 ~Dwo_name_info_reader()
704 // Get the dwo_names from the DWARF compilation unit DIEs.
706 get_dwo_names(File_list
* files
)
708 this->files_
= files
;
713 // Visit a compilation unit.
715 visit_compilation_unit(off_t cu_offset
, off_t cu_length
, Dwarf_die
*);
718 // The list of files to populate.
722 // A specialization of Dwarf_info_reader, for reading DWARF CUs and TUs
723 // and adding them to the output file.
725 class Unit_reader
: public Dwarf_info_reader
728 Unit_reader(bool is_type_unit
, Relobj
* object
, unsigned int shndx
)
729 : Dwarf_info_reader(is_type_unit
, object
, NULL
, 0, shndx
, 0, 0),
730 output_file_(NULL
), sections_(NULL
)
736 // Read the CUs or TUs and add them to the output file.
738 add_units(Dwp_output_file
*, unsigned int debug_abbrev
, Section_bounds
*);
741 // Visit a compilation unit.
743 visit_compilation_unit(off_t cu_offset
, off_t cu_length
, Dwarf_die
*);
745 // Visit a type unit.
747 visit_type_unit(off_t tu_offset
, off_t tu_length
, off_t type_offset
,
748 uint64_t signature
, Dwarf_die
*);
751 Dwp_output_file
* output_file_
;
752 Section_bounds
* sections_
;
755 // Return the name of a DWARF .dwo section.
758 get_dwarf_section_name(elfcpp::DW_SECT section_id
)
760 static const char* dwarf_section_names
[] = {
762 ".debug_info.dwo", // DW_SECT_INFO = 1
763 ".debug_types.dwo", // DW_SECT_TYPES = 2
764 ".debug_abbrev.dwo", // DW_SECT_ABBREV = 3
765 ".debug_line.dwo", // DW_SECT_LINE = 4
766 ".debug_loc.dwo", // DW_SECT_LOC = 5
767 ".debug_str_offsets.dwo", // DW_SECT_STR_OFFSETS = 6
768 ".debug_macinfo.dwo", // DW_SECT_MACINFO = 7
769 ".debug_macro.dwo", // DW_SECT_MACRO = 8
772 gold_assert(section_id
> 0 && section_id
<= elfcpp::DW_SECT_MAX
);
773 return dwarf_section_names
[section_id
];
776 // Class Sized_relobj_dwo.
778 // Setup the section information.
780 template <int size
, bool big_endian
>
782 Sized_relobj_dwo
<size
, big_endian
>::setup()
784 const unsigned int shnum
= this->elf_file_
.shnum();
785 this->set_shnum(shnum
);
786 this->section_offsets().resize(shnum
);
789 // Return a view of the contents of a section.
791 template <int size
, bool big_endian
>
793 Sized_relobj_dwo
<size
, big_endian
>::do_section_contents(
795 section_size_type
* plen
,
798 Object::Location
loc(this->elf_file_
.section_contents(shndx
));
799 *plen
= convert_to_section_size_type(loc
.data_size
);
802 static const unsigned char empty
[1] = { '\0' };
805 return this->get_view(loc
.file_offset
, *plen
, true, cache
);
808 // Return a view of the uncompressed contents of a section. Set *PLEN
809 // to the size. Set *IS_NEW to true if the contents need to be deleted
812 template <int size
, bool big_endian
>
814 Sized_relobj_dwo
<size
, big_endian
>::do_decompressed_section_contents(
816 section_size_type
* plen
,
819 section_size_type buffer_size
;
820 const unsigned char* buffer
= this->do_section_contents(shndx
, &buffer_size
,
823 std::string sect_name
= this->do_section_name(shndx
);
824 if (!is_prefix_of(".zdebug_", sect_name
.c_str()))
831 section_size_type uncompressed_size
= get_uncompressed_size(buffer
,
833 unsigned char* uncompressed_data
= new unsigned char[uncompressed_size
];
834 if (!decompress_input_section(buffer
,
838 this->error(_("could not decompress section %s"),
839 this->section_name(shndx
).c_str());
840 *plen
= uncompressed_size
;
842 return uncompressed_data
;
847 Dwo_file::~Dwo_file()
849 if (this->obj_
!= NULL
)
851 if (this->input_file_
!= NULL
)
852 delete this->input_file_
;
855 // Read the input executable file and extract the list of .dwo files
856 // that it references.
859 Dwo_file::read_executable(File_list
* files
)
861 this->obj_
= this->make_object(NULL
);
863 unsigned int shnum
= this->shnum();
864 this->is_compressed_
.resize(shnum
);
865 this->sect_offsets_
.resize(shnum
);
867 unsigned int debug_info
= 0;
868 unsigned int debug_abbrev
= 0;
870 // Scan the section table and collect the debug sections we need.
871 // (Section index 0 is a dummy section; skip it.)
872 for (unsigned int i
= 1; i
< shnum
; i
++)
874 if (this->section_type(i
) != elfcpp::SHT_PROGBITS
)
876 std::string sect_name
= this->section_name(i
);
877 const char* suffix
= sect_name
.c_str();
878 if (is_prefix_of(".debug_", suffix
))
880 else if (is_prefix_of(".zdebug_", suffix
))
882 this->is_compressed_
[i
] = true;
887 if (strcmp(suffix
, "info") == 0)
889 else if (strcmp(suffix
, "abbrev") == 0)
895 Dwo_name_info_reader
dwarf_reader(this->obj_
, debug_info
);
896 dwarf_reader
.set_abbrev_shndx(debug_abbrev
);
897 dwarf_reader
.get_dwo_names(files
);
901 // Read the input file and send its contents to OUTPUT_FILE.
904 Dwo_file::read(Dwp_output_file
* output_file
)
906 this->obj_
= this->make_object(output_file
);
908 unsigned int shnum
= this->shnum();
909 this->is_compressed_
.resize(shnum
);
910 this->sect_offsets_
.resize(shnum
);
912 typedef std::vector
<unsigned int> Types_list
;
913 Types_list debug_types
;
914 unsigned int debug_shndx
[elfcpp::DW_SECT_MAX
+ 1];
915 for (unsigned int i
= 0; i
<= elfcpp::DW_SECT_MAX
; i
++)
917 unsigned int debug_str
= 0;
918 unsigned int debug_cu_index
= 0;
919 unsigned int debug_tu_index
= 0;
921 // Scan the section table and collect debug sections.
922 // (Section index 0 is a dummy section; skip it.)
923 for (unsigned int i
= 1; i
< shnum
; i
++)
925 if (this->section_type(i
) != elfcpp::SHT_PROGBITS
)
927 std::string sect_name
= this->section_name(i
);
928 const char* suffix
= sect_name
.c_str();
929 if (is_prefix_of(".debug_", suffix
))
931 else if (is_prefix_of(".zdebug_", suffix
))
933 this->is_compressed_
[i
] = true;
938 if (strcmp(suffix
, "info.dwo") == 0)
939 debug_shndx
[elfcpp::DW_SECT_INFO
] = i
;
940 else if (strcmp(suffix
, "types.dwo") == 0)
941 debug_types
.push_back(i
);
942 else if (strcmp(suffix
, "abbrev.dwo") == 0)
943 debug_shndx
[elfcpp::DW_SECT_ABBREV
] = i
;
944 else if (strcmp(suffix
, "line.dwo") == 0)
945 debug_shndx
[elfcpp::DW_SECT_LINE
] = i
;
946 else if (strcmp(suffix
, "loc.dwo") == 0)
947 debug_shndx
[elfcpp::DW_SECT_LOC
] = i
;
948 else if (strcmp(suffix
, "str.dwo") == 0)
950 else if (strcmp(suffix
, "str_offsets.dwo") == 0)
951 debug_shndx
[elfcpp::DW_SECT_STR_OFFSETS
] = i
;
952 else if (strcmp(suffix
, "macinfo.dwo") == 0)
953 debug_shndx
[elfcpp::DW_SECT_MACINFO
] = i
;
954 else if (strcmp(suffix
, "macro.dwo") == 0)
955 debug_shndx
[elfcpp::DW_SECT_MACRO
] = i
;
956 else if (strcmp(suffix
, "cu_index") == 0)
958 else if (strcmp(suffix
, "tu_index") == 0)
962 // Merge the input string table into the output string table.
963 this->add_strings(output_file
, debug_str
);
965 // If we found any .dwp index sections, read those and add the section
966 // sets to the output file.
967 if (debug_cu_index
> 0 || debug_tu_index
> 0)
969 if (debug_cu_index
> 0)
970 this->read_unit_index(debug_cu_index
, debug_shndx
, output_file
, false);
971 if (debug_tu_index
> 0)
973 if (debug_types
.size() != 1)
974 gold_fatal(_("%s: .dwp file must have exactly one "
975 ".debug_types.dwo section"), this->name_
);
976 debug_shndx
[elfcpp::DW_SECT_TYPES
] = debug_types
[0];
977 this->read_unit_index(debug_tu_index
, debug_shndx
, output_file
, true);
982 // If we found no index sections, this is a .dwo file.
983 if (debug_shndx
[elfcpp::DW_SECT_INFO
] > 0)
984 this->add_unit_set(output_file
, debug_shndx
, false);
986 debug_shndx
[elfcpp::DW_SECT_INFO
] = 0;
987 for (Types_list::const_iterator tp
= debug_types
.begin();
988 tp
!= debug_types
.end();
991 debug_shndx
[elfcpp::DW_SECT_TYPES
] = *tp
;
992 this->add_unit_set(output_file
, debug_shndx
, true);
996 // Verify a .dwp file given a list of .dwo files referenced by the
997 // corresponding executable file. Returns true if no problems
1001 Dwo_file::verify(const File_list
& files
)
1003 this->obj_
= this->make_object(NULL
);
1005 unsigned int shnum
= this->shnum();
1006 this->is_compressed_
.resize(shnum
);
1007 this->sect_offsets_
.resize(shnum
);
1009 unsigned int debug_cu_index
= 0;
1011 // Scan the section table and collect debug sections.
1012 // (Section index 0 is a dummy section; skip it.)
1013 for (unsigned int i
= 1; i
< shnum
; i
++)
1015 if (this->section_type(i
) != elfcpp::SHT_PROGBITS
)
1017 std::string sect_name
= this->section_name(i
);
1018 const char* suffix
= sect_name
.c_str();
1019 if (is_prefix_of(".debug_", suffix
))
1021 else if (is_prefix_of(".zdebug_", suffix
))
1023 this->is_compressed_
[i
] = true;
1028 if (strcmp(suffix
, "cu_index") == 0)
1032 if (debug_cu_index
== 0)
1033 gold_fatal(_("%s: no .debug_cu_index section found"), this->name_
);
1035 return this->verify_dwo_list(debug_cu_index
, files
);
1038 // Create a Sized_relobj_dwo of the given size and endianness,
1039 // and record the target info.
1042 Dwo_file::make_object(Dwp_output_file
* output_file
)
1044 // Open the input file.
1045 Input_file
* input_file
= new Input_file(this->name_
);
1046 this->input_file_
= input_file
;
1049 if (!input_file
->open(dirpath
, NULL
, &index
))
1050 gold_fatal(_("%s: can't open"), this->name_
);
1052 // Check that it's an ELF file.
1053 off_t filesize
= input_file
->file().filesize();
1054 int hdrsize
= elfcpp::Elf_recognizer::max_header_size
;
1055 if (filesize
< hdrsize
)
1057 const unsigned char* elf_header
=
1058 input_file
->file().get_view(0, 0, hdrsize
, true, false);
1059 if (!elfcpp::Elf_recognizer::is_elf_file(elf_header
, hdrsize
))
1060 gold_fatal(_("%s: not an ELF object file"), this->name_
);
1062 // Get the size, endianness, machine, etc. info from the header,
1063 // make an appropriately-sized Relobj, and pass the target info
1064 // to the output object.
1068 if (!elfcpp::Elf_recognizer::is_valid_header(elf_header
, hdrsize
, &size
,
1069 &big_endian
, &error
))
1070 gold_fatal(_("%s: %s"), this->name_
, error
.c_str());
1075 #ifdef HAVE_TARGET_32_BIG
1076 return this->sized_make_object
<32, true>(elf_header
, input_file
,
1082 #ifdef HAVE_TARGET_32_LITTLE
1083 return this->sized_make_object
<32, false>(elf_header
, input_file
,
1089 else if (size
== 64)
1092 #ifdef HAVE_TARGET_64_BIG
1093 return this->sized_make_object
<64, true>(elf_header
, input_file
,
1099 #ifdef HAVE_TARGET_64_LITTLE
1100 return this->sized_make_object
<64, false>(elf_header
, input_file
,
1110 // Function template to create a Sized_relobj_dwo and record the target info.
1111 // P is a pointer to the ELF header in memory.
1113 template <int size
, bool big_endian
>
1115 Dwo_file::sized_make_object(const unsigned char* p
, Input_file
* input_file
,
1116 Dwp_output_file
* output_file
)
1118 elfcpp::Ehdr
<size
, big_endian
> ehdr(p
);
1119 Sized_relobj_dwo
<size
, big_endian
>* obj
=
1120 new Sized_relobj_dwo
<size
, big_endian
>(this->name_
, input_file
, ehdr
);
1122 if (output_file
!= NULL
)
1123 output_file
->record_target_info(
1124 this->name_
, ehdr
.get_e_machine(), size
, big_endian
,
1125 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
1126 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
1130 // Read the .debug_cu_index or .debug_tu_index section of a .dwp file,
1131 // and process the CU or TU sets.
1134 Dwo_file::read_unit_index(unsigned int shndx
, unsigned int *debug_shndx
,
1135 Dwp_output_file
* output_file
, bool is_tu_index
)
1137 if (this->obj_
->is_big_endian())
1138 this->sized_read_unit_index
<true>(shndx
, debug_shndx
, output_file
,
1141 this->sized_read_unit_index
<false>(shndx
, debug_shndx
, output_file
,
1145 template <bool big_endian
>
1147 Dwo_file::sized_read_unit_index(unsigned int shndx
,
1148 unsigned int *debug_shndx
,
1149 Dwp_output_file
* output_file
,
1152 elfcpp::DW_SECT info_sect
= (is_tu_index
1153 ? elfcpp::DW_SECT_TYPES
1154 : elfcpp::DW_SECT_INFO
);
1155 unsigned int info_shndx
= debug_shndx
[info_sect
];
1157 gold_assert(shndx
> 0 && info_shndx
> 0);
1159 section_size_type index_len
;
1161 const unsigned char* contents
=
1162 this->section_contents(shndx
, &index_len
, &index_is_new
);
1164 unsigned int version
=
1165 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
);
1167 // We don't support version 1 anymore because it was experimental
1168 // and because in normal use, dwp is not expected to read .dwp files
1169 // produced by an earlier version of the tool.
1171 gold_fatal(_("%s: section %s has unsupported version number %d"),
1172 this->name_
, this->section_name(shndx
).c_str(), version
);
1174 unsigned int ncols
=
1175 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1176 + sizeof(uint32_t));
1177 unsigned int nused
=
1178 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1179 + 2 * sizeof(uint32_t));
1180 if (ncols
== 0 || nused
== 0)
1183 unsigned int nslots
=
1184 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1185 + 3 * sizeof(uint32_t));
1187 const unsigned char* phash
= contents
+ 4 * sizeof(uint32_t);
1188 const unsigned char* pindex
= phash
+ nslots
* sizeof(uint64_t);
1189 const unsigned char* pcolhdrs
= pindex
+ nslots
* sizeof(uint32_t);
1190 const unsigned char* poffsets
= pcolhdrs
+ ncols
* sizeof(uint32_t);
1191 const unsigned char* psizes
= poffsets
+ nused
* ncols
* sizeof(uint32_t);
1192 const unsigned char* pend
= psizes
+ nused
* ncols
* sizeof(uint32_t);
1194 if (pend
> contents
+ index_len
)
1195 gold_fatal(_("%s: section %s is corrupt"), this->name_
,
1196 this->section_name(shndx
).c_str());
1198 // Copy the related sections and track the section offsets and sizes.
1199 Section_bounds sections
[elfcpp::DW_SECT_MAX
+ 1];
1200 for (int i
= elfcpp::DW_SECT_ABBREV
; i
<= elfcpp::DW_SECT_MAX
; ++i
)
1202 if (debug_shndx
[i
] > 0)
1203 sections
[i
] = this->copy_section(output_file
, debug_shndx
[i
],
1204 static_cast<elfcpp::DW_SECT
>(i
));
1207 // Get the contents of the .debug_info.dwo or .debug_types.dwo section.
1208 section_size_type info_len
;
1210 const unsigned char* info_contents
=
1211 this->section_contents(info_shndx
, &info_len
, &info_is_new
);
1213 // Loop over the slots of the hash table.
1214 for (unsigned int i
= 0; i
< nslots
; ++i
)
1216 uint64_t signature
=
1217 elfcpp::Swap_unaligned
<64, big_endian
>::readval(phash
);
1218 unsigned int index
=
1219 elfcpp::Swap_unaligned
<32, big_endian
>::readval(pindex
);
1220 if (index
!= 0 && (!is_tu_index
|| !output_file
->lookup_tu(signature
)))
1222 Unit_set
* unit_set
= new Unit_set();
1223 unit_set
->signature
= signature
;
1224 const unsigned char* pch
= pcolhdrs
;
1225 const unsigned char* porow
=
1226 poffsets
+ (index
- 1) * ncols
* sizeof(uint32_t);
1227 const unsigned char* psrow
=
1228 psizes
+ (index
- 1) * ncols
* sizeof(uint32_t);
1230 // Adjust the offset of each contribution within the input section
1231 // by the offset of the input section within the output section.
1232 for (unsigned int j
= 0; j
<= ncols
; j
++)
1234 unsigned int dw_sect
=
1235 elfcpp::Swap_unaligned
<64, big_endian
>::readval(pch
);
1236 unsigned int offset
=
1237 elfcpp::Swap_unaligned
<64, big_endian
>::readval(porow
);
1239 elfcpp::Swap_unaligned
<64, big_endian
>::readval(psrow
);
1240 unit_set
->sections
[dw_sect
].offset
= (sections
[dw_sect
].offset
1242 unit_set
->sections
[dw_sect
].size
= size
;
1243 pch
+= sizeof(uint32_t);
1244 porow
+= sizeof(uint32_t);
1245 psrow
+= sizeof(uint32_t);
1248 const unsigned char* unit_start
=
1249 info_contents
+ unit_set
->sections
[info_sect
].offset
;
1250 section_size_type unit_length
= unit_set
->sections
[info_sect
].size
;
1252 // Dwp_output_file::add_contribution writes the .debug_info.dwo
1253 // section directly to the output file, so we only need to
1254 // duplicate contributions for .debug_types.dwo section.
1257 unsigned char *copy
= new unsigned char[unit_length
];
1258 memcpy(copy
, unit_start
, unit_length
);
1261 section_offset_type off
=
1262 output_file
->add_contribution(info_sect
, unit_start
,
1264 unit_set
->sections
[info_sect
].offset
= off
;
1266 output_file
->add_tu_set(unit_set
);
1268 output_file
->add_cu_set(unit_set
);
1270 phash
+= sizeof(uint64_t);
1271 pindex
+= sizeof(uint32_t);
1277 delete[] info_contents
;
1280 // Verify the .debug_cu_index section of a .dwp file, comparing it
1281 // against the list of .dwo files referenced by the corresponding
1285 Dwo_file::verify_dwo_list(unsigned int shndx
, const File_list
& files
)
1287 if (this->obj_
->is_big_endian())
1288 return this->sized_verify_dwo_list
<true>(shndx
, files
);
1290 return this->sized_verify_dwo_list
<false>(shndx
, files
);
1293 template <bool big_endian
>
1295 Dwo_file::sized_verify_dwo_list(unsigned int shndx
, const File_list
& files
)
1297 gold_assert(shndx
> 0);
1299 section_size_type index_len
;
1301 const unsigned char* contents
=
1302 this->section_contents(shndx
, &index_len
, &index_is_new
);
1304 unsigned int version
=
1305 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
);
1307 // We don't support version 1 anymore because it was experimental
1308 // and because in normal use, dwp is not expected to read .dwp files
1309 // produced by an earlier version of the tool.
1311 gold_fatal(_("%s: section %s has unsupported version number %d"),
1312 this->name_
, this->section_name(shndx
).c_str(), version
);
1314 unsigned int ncols
=
1315 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1316 + sizeof(uint32_t));
1317 unsigned int nused
=
1318 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1319 + 2 * sizeof(uint32_t));
1320 if (ncols
== 0 || nused
== 0)
1323 unsigned int nslots
=
1324 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1325 + 3 * sizeof(uint32_t));
1327 const unsigned char* phash
= contents
+ 4 * sizeof(uint32_t);
1328 const unsigned char* pindex
= phash
+ nslots
* sizeof(uint64_t);
1329 const unsigned char* pcolhdrs
= pindex
+ nslots
* sizeof(uint32_t);
1330 const unsigned char* poffsets
= pcolhdrs
+ ncols
* sizeof(uint32_t);
1331 const unsigned char* psizes
= poffsets
+ nused
* ncols
* sizeof(uint32_t);
1332 const unsigned char* pend
= psizes
+ nused
* ncols
* sizeof(uint32_t);
1334 if (pend
> contents
+ index_len
)
1335 gold_fatal(_("%s: section %s is corrupt"), this->name_
,
1336 this->section_name(shndx
).c_str());
1339 for (File_list::const_iterator f
= files
.begin(); f
!= files
.end(); ++f
)
1341 uint64_t dwo_id
= f
->dwo_id
;
1342 unsigned int slot
= static_cast<unsigned int>(dwo_id
) & (nslots
- 1);
1343 const unsigned char* ph
= phash
+ slot
* sizeof(uint64_t);
1344 const unsigned char* pi
= pindex
+ slot
* sizeof(uint32_t);
1345 uint64_t probe
= elfcpp::Swap_unaligned
<64, big_endian
>::readval(ph
);
1346 uint32_t row_index
= elfcpp::Swap_unaligned
<32, big_endian
>::readval(pi
);
1347 if (row_index
!= 0 && probe
!= dwo_id
)
1349 unsigned int h2
= ((static_cast<unsigned int>(dwo_id
>> 32)
1350 & (nslots
- 1)) | 1);
1353 slot
= (slot
+ h2
) & (nslots
- 1);
1354 ph
= phash
+ slot
* sizeof(uint64_t);
1355 pi
= pindex
+ slot
* sizeof(uint32_t);
1356 probe
= elfcpp::Swap_unaligned
<64, big_endian
>::readval(ph
);
1357 row_index
= elfcpp::Swap_unaligned
<32, big_endian
>::readval(pi
);
1358 } while (row_index
!= 0 && probe
!= dwo_id
);
1362 printf(_("missing .dwo file: %016llx %s\n"),
1363 static_cast<long long>(dwo_id
), f
->dwo_name
.c_str());
1368 gold_info(_("Found %d missing .dwo files"), nmissing
);
1373 return nmissing
== 0;
1376 // Merge the input string table section into the output file.
1379 Dwo_file::add_strings(Dwp_output_file
* output_file
, unsigned int debug_str
)
1381 section_size_type len
;
1383 const unsigned char* pdata
= this->section_contents(debug_str
, &len
, &is_new
);
1384 const char* p
= reinterpret_cast<const char*>(pdata
);
1385 const char* pend
= p
+ len
;
1387 // Check that the last string is null terminated.
1388 if (pend
[-1] != '\0')
1389 gold_fatal(_("%s: last entry in string section '%s' "
1390 "is not null terminated"),
1392 this->section_name(debug_str
).c_str());
1394 // Count the number of strings in the section, and size the map.
1396 for (const char* pt
= p
; pt
< pend
; pt
+= strlen(pt
) + 1)
1398 this->str_offset_map_
.reserve(count
+ 1);
1400 // Add the strings to the output string table, and record the new offsets
1402 section_offset_type i
= 0;
1403 section_offset_type new_offset
;
1406 size_t len
= strlen(p
);
1407 new_offset
= output_file
->add_string(p
, len
);
1408 this->str_offset_map_
.push_back(std::make_pair(i
, new_offset
));
1413 this->str_offset_map_
.push_back(std::make_pair(i
, new_offset
));
1418 // Copy a section from the input file to the output file.
1419 // Return the offset and length of this input section's contribution
1420 // in the output section. If copying .debug_str_offsets.dwo, remap
1421 // the string offsets for the output string table.
1424 Dwo_file::copy_section(Dwp_output_file
* output_file
, unsigned int shndx
,
1425 elfcpp::DW_SECT section_id
)
1427 // Some sections may be referenced from more than one set.
1428 // Don't copy a section more than once.
1429 if (this->sect_offsets_
[shndx
].size
> 0)
1430 return this->sect_offsets_
[shndx
];
1432 // Get the section contents. Upon return, if IS_NEW is true, the memory
1433 // has been allocated via new; if false, the memory is part of the mapped
1434 // input file, and we will need to duplicate it so that it will persist
1435 // after we close the input file.
1436 section_size_type len
;
1438 const unsigned char* contents
= this->section_contents(shndx
, &len
, &is_new
);
1440 if (section_id
== elfcpp::DW_SECT_STR_OFFSETS
)
1442 const unsigned char* remapped
= this->remap_str_offsets(contents
, len
);
1445 contents
= remapped
;
1449 unsigned char* copy
= new unsigned char[len
];
1450 memcpy(copy
, contents
, len
);
1454 // Add the contents of the input section to the output section.
1455 // The output file takes ownership of the memory pointed to by CONTENTS.
1456 section_offset_type off
= output_file
->add_contribution(section_id
, contents
,
1459 // Store the output section bounds.
1460 Section_bounds
bounds(off
, len
);
1461 this->sect_offsets_
[shndx
] = bounds
;
1467 const unsigned char*
1468 Dwo_file::remap_str_offsets(const unsigned char* contents
,
1469 section_size_type len
)
1472 gold_fatal(_("%s: .debug_str_offsets.dwo section size not a multiple of 4"),
1475 if (this->obj_
->is_big_endian())
1476 return this->sized_remap_str_offsets
<true>(contents
, len
);
1478 return this->sized_remap_str_offsets
<false>(contents
, len
);
1481 template <bool big_endian
>
1482 const unsigned char*
1483 Dwo_file::sized_remap_str_offsets(const unsigned char* contents
,
1484 section_size_type len
)
1486 unsigned char* remapped
= new unsigned char[len
];
1487 const unsigned char* p
= contents
;
1488 unsigned char* q
= remapped
;
1491 unsigned int val
= elfcpp::Swap_unaligned
<32, big_endian
>::readval(p
);
1492 val
= this->remap_str_offset(val
);
1493 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(q
, val
);
1502 Dwo_file::remap_str_offset(section_offset_type val
)
1504 Str_offset_map_entry entry
;
1507 Str_offset_map::const_iterator p
=
1508 std::lower_bound(this->str_offset_map_
.begin(),
1509 this->str_offset_map_
.end(),
1510 entry
, Offset_compare());
1512 if (p
== this->str_offset_map_
.end() || p
->first
> val
)
1514 if (p
== this->str_offset_map_
.begin())
1517 gold_assert(p
->first
<= val
);
1520 return p
->second
+ (val
- p
->first
);
1523 // Add a set of .debug_info.dwo or .debug_types.dwo and related sections
1527 Dwo_file::add_unit_set(Dwp_output_file
* output_file
, unsigned int *debug_shndx
,
1528 bool is_debug_types
)
1530 unsigned int shndx
= (is_debug_types
1531 ? debug_shndx
[elfcpp::DW_SECT_TYPES
]
1532 : debug_shndx
[elfcpp::DW_SECT_INFO
]);
1534 gold_assert(shndx
!= 0);
1536 if (debug_shndx
[elfcpp::DW_SECT_ABBREV
] == 0)
1537 gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_
);
1539 // Copy the related sections and track the section offsets and sizes.
1540 Section_bounds sections
[elfcpp::DW_SECT_MAX
+ 1];
1541 for (int i
= elfcpp::DW_SECT_ABBREV
; i
<= elfcpp::DW_SECT_MAX
; ++i
)
1543 if (debug_shndx
[i
] > 0)
1544 sections
[i
] = this->copy_section(output_file
, debug_shndx
[i
],
1545 static_cast<elfcpp::DW_SECT
>(i
));
1548 // Parse the .debug_info or .debug_types section and add each compilation
1549 // or type unit to the output file, along with the contributions to the
1550 // related sections.
1551 Unit_reader
reader(is_debug_types
, this->obj_
, shndx
);
1552 reader
.add_units(output_file
, debug_shndx
[elfcpp::DW_SECT_ABBREV
], sections
);
1555 // Class Dwp_output_file.
1557 // Record the target info from an input file. On first call, we
1558 // set the ELF header values for the output file. On subsequent
1559 // calls, we just verify that the values match.
1562 Dwp_output_file::record_target_info(const char*, int machine
,
1563 int size
, bool big_endian
,
1564 int osabi
, int abiversion
)
1566 // TODO: Check the values on subsequent calls.
1567 if (this->size_
> 0)
1570 this->machine_
= machine
;
1572 this->big_endian_
= big_endian
;
1573 this->osabi_
= osabi
;
1574 this->abiversion_
= abiversion
;
1577 this->next_file_offset_
= elfcpp::Elf_sizes
<32>::ehdr_size
;
1578 else if (size
== 64)
1579 this->next_file_offset_
= elfcpp::Elf_sizes
<64>::ehdr_size
;
1583 this->fd_
= ::fopen(this->name_
, "wb");
1584 if (this->fd_
== NULL
)
1585 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1587 // Write zeroes for the ELF header initially. We'll write
1588 // the actual header during finalize().
1589 static const char buf
[elfcpp::Elf_sizes
<64>::ehdr_size
] = { 0 };
1590 if (::fwrite(buf
, 1, this->next_file_offset_
, this->fd_
)
1591 < (size_t) this->next_file_offset_
)
1592 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1595 // Add a string to the debug strings section.
1598 Dwp_output_file::add_string(const char* str
, size_t len
)
1600 Stringpool::Key key
;
1601 this->stringpool_
.add_with_length(str
, len
, true, &key
);
1602 this->have_strings_
= true;
1603 // We aren't supposed to call get_offset() until after
1604 // calling set_string_offsets(), but the offsets will
1605 // not change unless optimizing the string pool.
1606 return this->stringpool_
.get_offset_from_key(key
);
1609 // Align the file offset to the given boundary.
1612 align_offset(off_t off
, int align
)
1614 return (off
+ align
- 1) & ~(align
- 1);
1617 // Add a new output section and return the section index.
1620 Dwp_output_file::add_output_section(const char* section_name
, int align
)
1622 Section
sect(section_name
, align
);
1623 this->sections_
.push_back(sect
);
1624 return this->shnum_
++;
1627 // Add a contribution to a section in the output file, and return the offset
1628 // of the contribution within the output section. The .debug_info.dwo section
1629 // is expected to be the largest one, so we will write the contents of this
1630 // section directly to the output file as we receive contributions, allowing
1631 // us to free that memory as soon as possible. We will save the remaining
1632 // contributions until we finalize the layout of the output file.
1635 Dwp_output_file::add_contribution(elfcpp::DW_SECT section_id
,
1636 const unsigned char* contents
,
1637 section_size_type len
,
1640 const char* section_name
= get_dwarf_section_name(section_id
);
1641 gold_assert(static_cast<size_t>(section_id
) < this->section_id_map_
.size());
1642 unsigned int shndx
= this->section_id_map_
[section_id
];
1644 // Create the section if necessary.
1647 section_name
= this->shstrtab_
.add_with_length(section_name
,
1648 strlen(section_name
),
1650 shndx
= this->add_output_section(section_name
, align
);
1651 this->section_id_map_
[section_id
] = shndx
;
1654 Section
& section
= this->sections_
[shndx
- 1];
1656 section_offset_type section_offset
;
1658 if (section_id
== elfcpp::DW_SECT_INFO
)
1660 // Write the .debug_info.dwo section directly.
1661 // We do not need to free the memory in this case.
1662 off_t file_offset
= this->next_file_offset_
;
1663 gold_assert(this->size_
> 0 && file_offset
> 0);
1665 file_offset
= align_offset(file_offset
, align
);
1666 if (section
.offset
== 0)
1667 section
.offset
= file_offset
;
1669 if (align
> section
.align
)
1671 // Since we've already committed to the layout for this
1672 // section, an unexpected large alignment boundary may
1673 // be impossible to honor.
1674 if (align_offset(section
.offset
, align
) != section
.offset
)
1675 gold_fatal(_("%s: alignment (%d) for section '%s' "
1676 "cannot be honored"),
1677 this->name_
, align
, section_name
);
1678 section
.align
= align
;
1681 section_offset
= file_offset
- section
.offset
;
1682 section
.size
= file_offset
+ len
- section
.offset
;
1684 ::fseek(this->fd_
, file_offset
, SEEK_SET
);
1685 if (::fwrite(contents
, 1, len
, this->fd_
) < len
)
1686 gold_fatal(_("%s: error writing section '%s'"), this->name_
,
1688 this->next_file_offset_
= file_offset
+ len
;
1692 // Collect the contributions and keep track of the total size.
1693 if (align
> section
.align
)
1694 section
.align
= align
;
1695 section_offset
= align_offset(section
.size
, align
);
1696 section
.size
= section_offset
+ len
;
1697 Contribution contrib
= { section_offset
, len
, contents
};
1698 section
.contributions
.push_back(contrib
);
1701 return section_offset
;
1704 // Add a set of .debug_info and related sections to the output file.
1707 Dwp_output_file::add_cu_set(Unit_set
* cu_set
)
1709 uint64_t dwo_id
= cu_set
->signature
;
1711 if (!this->cu_index_
.find_or_add(dwo_id
, &slot
))
1712 this->cu_index_
.enter_set(slot
, cu_set
);
1714 gold_warning(_("%s: duplicate entry for CU (dwo_id 0x%llx)"),
1715 this->name_
, (unsigned long long)dwo_id
);
1718 // Lookup a type signature and return TRUE if we have already seen it.
1720 Dwp_output_file::lookup_tu(uint64_t type_sig
)
1722 this->last_type_sig_
= type_sig
;
1723 return this->tu_index_
.find_or_add(type_sig
, &this->last_tu_slot_
);
1726 // Add a set of .debug_types and related sections to the output file.
1729 Dwp_output_file::add_tu_set(Unit_set
* tu_set
)
1731 uint64_t type_sig
= tu_set
->signature
;
1733 if (type_sig
== this->last_type_sig_
)
1734 slot
= this->last_tu_slot_
;
1736 this->tu_index_
.find_or_add(type_sig
, &slot
);
1737 this->tu_index_
.enter_set(slot
, tu_set
);
1740 // Find a slot in the hash table for SIGNATURE. Return TRUE
1741 // if the entry already exists.
1744 Dwp_output_file::Dwp_index::find_or_add(uint64_t signature
,
1745 unsigned int* slotp
)
1747 if (this->capacity_
== 0)
1750 static_cast<unsigned int>(signature
) & (this->capacity_
- 1);
1751 unsigned int secondary_hash
;
1752 uint64_t probe
= this->hash_table_
[slot
];
1753 uint32_t row_index
= this->index_table_
[slot
];
1754 if (row_index
!= 0 && probe
!= signature
)
1756 secondary_hash
= (static_cast<unsigned int>(signature
>> 32)
1757 & (this->capacity_
- 1)) | 1;
1760 slot
= (slot
+ secondary_hash
) & (this->capacity_
- 1);
1761 probe
= this->hash_table_
[slot
];
1762 row_index
= this->index_table_
[slot
];
1763 } while (row_index
!= 0 && probe
!= signature
);
1766 return (row_index
!= 0);
1769 // Enter a CU or TU set at the given SLOT in the hash table.
1772 Dwp_output_file::Dwp_index::enter_set(unsigned int slot
,
1773 const Unit_set
* set
)
1775 gold_assert(slot
< this->capacity_
);
1777 // Add a row to the offsets and sizes tables.
1778 this->section_table_
.push_back(set
);
1779 uint32_t row_index
= this->section_table_rows();
1781 // Mark the sections used in this set.
1782 for (unsigned int i
= 1; i
<= elfcpp::DW_SECT_MAX
; i
++)
1783 if (set
->sections
[i
].size
> 0)
1784 this->section_mask_
|= 1 << i
;
1786 // Enter the signature and pool index into the hash table.
1787 gold_assert(this->hash_table_
[slot
] == 0);
1788 this->hash_table_
[slot
] = set
->signature
;
1789 this->index_table_
[slot
] = row_index
;
1792 // Grow the hash table when we exceed 2/3 capacity.
1793 if (this->used_
* 3 > this->capacity_
* 2)
1797 // Initialize the hash table.
1800 Dwp_output_file::Dwp_index::initialize()
1802 this->capacity_
= 16;
1803 this->hash_table_
= new uint64_t[this->capacity_
];
1804 memset(this->hash_table_
, 0, this->capacity_
* sizeof(uint64_t));
1805 this->index_table_
= new uint32_t[this->capacity_
];
1806 memset(this->index_table_
, 0, this->capacity_
* sizeof(uint32_t));
1809 // Grow the hash table when we reach 2/3 capacity.
1812 Dwp_output_file::Dwp_index::grow()
1814 unsigned int old_capacity
= this->capacity_
;
1815 uint64_t* old_hash_table
= this->hash_table_
;
1816 uint32_t* old_index_table
= this->index_table_
;
1817 unsigned int old_used
= this->used_
;
1819 this->capacity_
= old_capacity
* 2;
1820 this->hash_table_
= new uint64_t[this->capacity_
];
1821 memset(this->hash_table_
, 0, this->capacity_
* sizeof(uint64_t));
1822 this->index_table_
= new uint32_t[this->capacity_
];
1823 memset(this->index_table_
, 0, this->capacity_
* sizeof(uint32_t));
1826 for (unsigned int i
= 0; i
< old_capacity
; ++i
)
1828 uint64_t signature
= old_hash_table
[i
];
1829 uint32_t row_index
= old_index_table
[i
];
1833 bool found
= this->find_or_add(signature
, &slot
);
1834 gold_assert(!found
);
1835 this->hash_table_
[slot
] = signature
;
1836 this->index_table_
[slot
] = row_index
;
1840 gold_assert(this->used_
== old_used
);
1842 delete[] old_hash_table
;
1843 delete[] old_index_table
;
1846 // Finalize the file, write the string tables and index sections,
1847 // and close the file.
1850 Dwp_output_file::finalize()
1854 // Write the accumulated output sections.
1855 for (unsigned int i
= 0; i
< this->sections_
.size(); i
++)
1857 Section
& sect
= this->sections_
[i
];
1858 // If the offset has already been assigned, the section has been written.
1859 if (sect
.offset
> 0 || sect
.size
== 0)
1861 off_t file_offset
= this->next_file_offset_
;
1862 file_offset
= align_offset(file_offset
, sect
.align
);
1863 sect
.offset
= file_offset
;
1864 this->write_contributions(sect
);
1865 this->next_file_offset_
= file_offset
+ sect
.size
;
1868 // Write the debug string table.
1869 if (this->have_strings_
)
1871 this->stringpool_
.set_string_offsets();
1872 section_size_type len
= this->stringpool_
.get_strtab_size();
1873 buf
= new unsigned char[len
];
1874 this->stringpool_
.write_to_buffer(buf
, len
);
1875 this->write_new_section(".debug_str.dwo", buf
, len
, 1);
1879 // Write the CU and TU indexes.
1880 if (this->big_endian_
)
1882 this->write_index
<true>(".debug_cu_index", this->cu_index_
);
1883 this->write_index
<true>(".debug_tu_index", this->tu_index_
);
1887 this->write_index
<false>(".debug_cu_index", this->cu_index_
);
1888 this->write_index
<false>(".debug_tu_index", this->tu_index_
);
1891 off_t file_offset
= this->next_file_offset_
;
1893 // Write the section string table.
1894 this->shstrndx_
= this->shnum_
++;
1895 const char* shstrtab_name
=
1896 this->shstrtab_
.add_with_length(".shstrtab", sizeof(".shstrtab") - 1,
1898 this->shstrtab_
.set_string_offsets();
1899 section_size_type shstrtab_len
= this->shstrtab_
.get_strtab_size();
1900 buf
= new unsigned char[shstrtab_len
];
1901 this->shstrtab_
.write_to_buffer(buf
, shstrtab_len
);
1902 off_t shstrtab_off
= file_offset
;
1903 ::fseek(this->fd_
, file_offset
, 0);
1904 if (::fwrite(buf
, 1, shstrtab_len
, this->fd_
) < shstrtab_len
)
1905 gold_fatal(_("%s: error writing section '.shstrtab'"), this->name_
);
1907 file_offset
+= shstrtab_len
;
1909 // Write the section header table. The first entry is a NULL entry.
1910 // This is followed by the debug sections, and finally we write the
1911 // .shstrtab section header.
1912 file_offset
= align_offset(file_offset
, this->size_
== 32 ? 4 : 8);
1913 this->shoff_
= file_offset
;
1914 ::fseek(this->fd_
, file_offset
, 0);
1915 section_size_type sh0_size
= 0;
1916 unsigned int sh0_link
= 0;
1917 if (this->shnum_
>= elfcpp::SHN_LORESERVE
)
1918 sh0_size
= this->shnum_
;
1919 if (this->shstrndx_
>= elfcpp::SHN_LORESERVE
)
1920 sh0_link
= this->shstrndx_
;
1921 this->write_shdr(NULL
, 0, 0, 0, 0, sh0_size
, sh0_link
, 0, 0, 0);
1922 for (unsigned int i
= 0; i
< this->sections_
.size(); ++i
)
1924 Section
& sect
= this->sections_
[i
];
1925 this->write_shdr(sect
.name
, elfcpp::SHT_PROGBITS
, 0, 0, sect
.offset
,
1926 sect
.size
, 0, 0, sect
.align
, 0);
1928 this->write_shdr(shstrtab_name
, elfcpp::SHT_STRTAB
, 0, 0,
1929 shstrtab_off
, shstrtab_len
, 0, 0, 1, 0);
1931 // Write the ELF header.
1935 if (this->fd_
!= NULL
)
1937 if (::fclose(this->fd_
) != 0)
1938 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1943 // Write the contributions to an output section.
1946 Dwp_output_file::write_contributions(const Section
& sect
)
1948 for (unsigned int i
= 0; i
< sect
.contributions
.size(); ++i
)
1950 const Contribution
& c
= sect
.contributions
[i
];
1951 ::fseek(this->fd_
, sect
.offset
+ c
.output_offset
, SEEK_SET
);
1952 if (::fwrite(c
.contents
, 1, c
.size
, this->fd_
) < c
.size
)
1953 gold_fatal(_("%s: error writing section '%s'"), this->name_
, sect
.name
);
1954 delete[] c
.contents
;
1958 // Write a new section to the output file.
1961 Dwp_output_file::write_new_section(const char* section_name
,
1962 const unsigned char* contents
,
1963 section_size_type len
, int align
)
1965 section_name
= this->shstrtab_
.add_with_length(section_name
,
1966 strlen(section_name
),
1968 unsigned int shndx
= this->add_output_section(section_name
, align
);
1969 Section
& section
= this->sections_
[shndx
- 1];
1970 off_t file_offset
= this->next_file_offset_
;
1971 file_offset
= align_offset(file_offset
, align
);
1972 section
.offset
= file_offset
;
1974 ::fseek(this->fd_
, file_offset
, SEEK_SET
);
1975 if (::fwrite(contents
, 1, len
, this->fd_
) < len
)
1976 gold_fatal(_("%s: error writing section '%s'"), this->name_
, section_name
);
1977 this->next_file_offset_
= file_offset
+ len
;
1980 // Write a CU or TU index section.
1982 template<bool big_endian
>
1984 Dwp_output_file::write_index(const char* sect_name
, const Dwp_index
& index
)
1986 const unsigned int nslots
= index
.hash_table_total_slots();
1987 const unsigned int nused
= index
.hash_table_used_slots();
1988 const unsigned int nrows
= index
.section_table_rows();
1990 int column_mask
= index
.section_table_cols();
1991 unsigned int ncols
= 0;
1992 for (unsigned int c
= 1; c
<= elfcpp::DW_SECT_MAX
; ++c
)
1993 if (column_mask
& (1 << c
))
1995 const unsigned int ntable
= (nrows
* 2 + 1) * ncols
;
1997 const section_size_type index_size
= (4 * sizeof(uint32_t)
1998 + nslots
* sizeof(uint64_t)
1999 + nslots
* sizeof(uint32_t)
2000 + ntable
* sizeof(uint32_t));
2002 // Allocate a buffer for the section contents.
2003 unsigned char* buf
= new unsigned char[index_size
];
2004 unsigned char* p
= buf
;
2006 // Write the section header: version number, padding,
2007 // number of used slots and total number of slots.
2008 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, 2);
2009 p
+= sizeof(uint32_t);
2010 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, ncols
);
2011 p
+= sizeof(uint32_t);
2012 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, nused
);
2013 p
+= sizeof(uint32_t);
2014 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, nslots
);
2015 p
+= sizeof(uint32_t);
2017 // Write the hash table.
2018 for (unsigned int i
= 0; i
< nslots
; ++i
)
2020 elfcpp::Swap_unaligned
<64, big_endian
>::writeval(p
, index
.hash_table(i
));
2021 p
+= sizeof(uint64_t);
2024 // Write the parallel index table.
2025 for (unsigned int i
= 0; i
< nslots
; ++i
)
2027 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, index
.index_table(i
));
2028 p
+= sizeof(uint32_t);
2031 // Write the first row of the table of section offsets.
2032 for (unsigned int c
= 1; c
<= elfcpp::DW_SECT_MAX
; ++c
)
2034 if (column_mask
& (1 << c
))
2036 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, c
);
2037 p
+= sizeof(uint32_t);
2041 // Write the table of section offsets.
2042 Dwp_index::Section_table::const_iterator tbl
= index
.section_table();
2043 for (unsigned int r
= 0; r
< nrows
; ++r
)
2045 gold_assert(tbl
!= index
.section_table_end());
2046 const Section_bounds
* sects
= (*tbl
)->sections
;
2047 for (unsigned int c
= 1; c
<= elfcpp::DW_SECT_MAX
; ++c
)
2049 if (column_mask
& (1 << c
))
2051 section_offset_type offset
= sects
[c
].offset
;
2052 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, offset
);
2053 p
+= sizeof(uint32_t);
2056 gold_assert(sects
[c
].size
== 0);
2061 // Write the table of section sizes.
2062 tbl
= index
.section_table();
2063 for (unsigned int r
= 0; r
< nrows
; ++r
)
2065 gold_assert(tbl
!= index
.section_table_end());
2066 const Section_bounds
* sects
= (*tbl
)->sections
;
2067 for (unsigned int c
= 1; c
<= elfcpp::DW_SECT_MAX
; ++c
)
2069 if (column_mask
& (1 << c
))
2071 section_size_type size
= sects
[c
].size
;
2072 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, size
);
2073 p
+= sizeof(uint32_t);
2076 gold_assert(sects
[c
].size
== 0);
2081 gold_assert(p
== buf
+ index_size
);
2083 this->write_new_section(sect_name
, buf
, index_size
, sizeof(uint64_t));
2088 // Write the ELF header.
2091 Dwp_output_file::write_ehdr()
2093 if (this->size_
== 32)
2095 if (this->big_endian_
)
2096 return this->sized_write_ehdr
<32, true>();
2098 return this->sized_write_ehdr
<32, false>();
2100 else if (this->size_
== 64)
2102 if (this->big_endian_
)
2103 return this->sized_write_ehdr
<64, true>();
2105 return this->sized_write_ehdr
<64, false>();
2111 template<unsigned int size
, bool big_endian
>
2113 Dwp_output_file::sized_write_ehdr()
2115 const unsigned int ehdr_size
= elfcpp::Elf_sizes
<size
>::ehdr_size
;
2116 unsigned char buf
[ehdr_size
];
2117 elfcpp::Ehdr_write
<size
, big_endian
> ehdr(buf
);
2119 unsigned char e_ident
[elfcpp::EI_NIDENT
];
2120 memset(e_ident
, 0, elfcpp::EI_NIDENT
);
2121 e_ident
[elfcpp::EI_MAG0
] = elfcpp::ELFMAG0
;
2122 e_ident
[elfcpp::EI_MAG1
] = elfcpp::ELFMAG1
;
2123 e_ident
[elfcpp::EI_MAG2
] = elfcpp::ELFMAG2
;
2124 e_ident
[elfcpp::EI_MAG3
] = elfcpp::ELFMAG3
;
2126 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS32
;
2127 else if (size
== 64)
2128 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS64
;
2131 e_ident
[elfcpp::EI_DATA
] = (big_endian
2132 ? elfcpp::ELFDATA2MSB
2133 : elfcpp::ELFDATA2LSB
);
2134 e_ident
[elfcpp::EI_VERSION
] = elfcpp::EV_CURRENT
;
2135 ehdr
.put_e_ident(e_ident
);
2137 ehdr
.put_e_type(elfcpp::ET_REL
);
2138 ehdr
.put_e_machine(this->machine_
);
2139 ehdr
.put_e_version(elfcpp::EV_CURRENT
);
2140 ehdr
.put_e_entry(0);
2141 ehdr
.put_e_phoff(0);
2142 ehdr
.put_e_shoff(this->shoff_
);
2143 ehdr
.put_e_flags(0);
2144 ehdr
.put_e_ehsize(elfcpp::Elf_sizes
<size
>::ehdr_size
);
2145 ehdr
.put_e_phentsize(0);
2146 ehdr
.put_e_phnum(0);
2147 ehdr
.put_e_shentsize(elfcpp::Elf_sizes
<size
>::shdr_size
);
2148 ehdr
.put_e_shnum(this->shnum_
< elfcpp::SHN_LORESERVE
? this->shnum_
: 0);
2149 ehdr
.put_e_shstrndx(this->shstrndx_
< elfcpp::SHN_LORESERVE
2151 : static_cast<unsigned int>(elfcpp::SHN_XINDEX
));
2153 ::fseek(this->fd_
, 0, 0);
2154 if (::fwrite(buf
, 1, ehdr_size
, this->fd_
) < ehdr_size
)
2155 gold_fatal(_("%s: error writing ELF header"), this->name_
);
2158 // Write a section header.
2161 Dwp_output_file::write_shdr(const char* name
, unsigned int type
,
2162 unsigned int flags
, uint64_t addr
, off_t offset
,
2163 section_size_type sect_size
, unsigned int link
,
2164 unsigned int info
, unsigned int align
,
2165 unsigned int ent_size
)
2167 if (this->size_
== 32)
2169 if (this->big_endian_
)
2170 return this->sized_write_shdr
<32, true>(name
, type
, flags
, addr
,
2171 offset
, sect_size
, link
, info
,
2174 return this->sized_write_shdr
<32, false>(name
, type
, flags
, addr
,
2175 offset
, sect_size
, link
, info
,
2178 else if (this->size_
== 64)
2180 if (this->big_endian_
)
2181 return this->sized_write_shdr
<64, true>(name
, type
, flags
, addr
,
2182 offset
, sect_size
, link
, info
,
2185 return this->sized_write_shdr
<64, false>(name
, type
, flags
, addr
,
2186 offset
, sect_size
, link
, info
,
2193 template<unsigned int size
, bool big_endian
>
2195 Dwp_output_file::sized_write_shdr(const char* name
, unsigned int type
,
2196 unsigned int flags
, uint64_t addr
,
2197 off_t offset
, section_size_type sect_size
,
2198 unsigned int link
, unsigned int info
,
2199 unsigned int align
, unsigned int ent_size
)
2201 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
2202 unsigned char buf
[shdr_size
];
2203 elfcpp::Shdr_write
<size
, big_endian
> shdr(buf
);
2205 shdr
.put_sh_name(name
== NULL
? 0 : this->shstrtab_
.get_offset(name
));
2206 shdr
.put_sh_type(type
);
2207 shdr
.put_sh_flags(flags
);
2208 shdr
.put_sh_addr(addr
);
2209 shdr
.put_sh_offset(offset
);
2210 shdr
.put_sh_size(sect_size
);
2211 shdr
.put_sh_link(link
);
2212 shdr
.put_sh_info(info
);
2213 shdr
.put_sh_addralign(align
);
2214 shdr
.put_sh_entsize(ent_size
);
2215 if (::fwrite(buf
, 1, shdr_size
, this->fd_
) < shdr_size
)
2216 gold_fatal(_("%s: error writing section header table"), this->name_
);
2219 // Class Dwo_name_info_reader.
2221 // Visit a compilation unit.
2224 Dwo_name_info_reader::visit_compilation_unit(off_t
, off_t
, Dwarf_die
* die
)
2226 const char* dwo_name
= die
->string_attribute(elfcpp::DW_AT_GNU_dwo_name
);
2227 if (dwo_name
!= NULL
)
2229 uint64_t dwo_id
= die
->uint_attribute(elfcpp::DW_AT_GNU_dwo_id
);
2230 this->files_
->push_back(Dwo_file_entry(dwo_id
, dwo_name
));
2234 // Class Unit_reader.
2236 // Read the CUs or TUs and add them to the output file.
2239 Unit_reader::add_units(Dwp_output_file
* output_file
,
2240 unsigned int debug_abbrev
,
2241 Section_bounds
* sections
)
2243 this->output_file_
= output_file
;
2244 this->sections_
= sections
;
2245 this->set_abbrev_shndx(debug_abbrev
);
2249 // Visit a compilation unit.
2252 Unit_reader::visit_compilation_unit(off_t
, off_t cu_length
, Dwarf_die
* die
)
2257 Unit_set
* unit_set
= new Unit_set();
2258 unit_set
->signature
= die
->uint_attribute(elfcpp::DW_AT_GNU_dwo_id
);
2259 for (unsigned int i
= elfcpp::DW_SECT_ABBREV
; i
<= elfcpp::DW_SECT_MAX
; ++i
)
2260 unit_set
->sections
[i
] = this->sections_
[i
];
2262 // Dwp_output_file::add_contribution writes the .debug_info.dwo section
2263 // directly to the output file, so we do not need to duplicate the
2264 // section contents, and add_contribution does not need to free the memory.
2265 section_offset_type off
=
2266 this->output_file_
->add_contribution(elfcpp::DW_SECT_INFO
,
2267 this->buffer_at_offset(0),
2269 Section_bounds
bounds(off
, cu_length
);
2270 unit_set
->sections
[elfcpp::DW_SECT_INFO
] = bounds
;
2271 this->output_file_
->add_cu_set(unit_set
);
2274 // Visit a type unit.
2277 Unit_reader::visit_type_unit(off_t
, off_t tu_length
, off_t
,
2278 uint64_t signature
, Dwarf_die
*)
2282 if (this->output_file_
->lookup_tu(signature
))
2285 Unit_set
* unit_set
= new Unit_set();
2286 unit_set
->signature
= signature
;
2287 for (unsigned int i
= elfcpp::DW_SECT_ABBREV
; i
<= elfcpp::DW_SECT_MAX
; ++i
)
2288 unit_set
->sections
[i
] = this->sections_
[i
];
2290 unsigned char* contents
= new unsigned char[tu_length
];
2291 memcpy(contents
, this->buffer_at_offset(0), tu_length
);
2292 section_offset_type off
=
2293 this->output_file_
->add_contribution(elfcpp::DW_SECT_TYPES
, contents
,
2295 Section_bounds
bounds(off
, tu_length
);
2296 unit_set
->sections
[elfcpp::DW_SECT_TYPES
] = bounds
;
2297 this->output_file_
->add_tu_set(unit_set
);
2300 }; // End namespace gold
2302 using namespace gold
;
2307 VERIFY_ONLY
= 0x101,
2310 struct option dwp_options
[] =
2312 { "exec", required_argument
, NULL
, 'e' },
2313 { "help", no_argument
, NULL
, 'h' },
2314 { "output", required_argument
, NULL
, 'o' },
2315 { "verbose", no_argument
, NULL
, 'v' },
2316 { "verify-only", no_argument
, NULL
, VERIFY_ONLY
},
2317 { "version", no_argument
, NULL
, 'V' },
2318 { NULL
, 0, NULL
, 0 }
2321 // Print usage message and exit.
2324 usage(FILE* fd
, int exit_status
)
2326 fprintf(fd
, _("Usage: %s [options] [file...]\n"), program_name
);
2327 fprintf(fd
, _(" -h, --help Print this help message\n"));
2328 fprintf(fd
, _(" -e EXE, --exec EXE Get list of dwo files from EXE"
2329 " (defaults output to EXE.dwp)\n"));
2330 fprintf(fd
, _(" -o FILE, --output FILE Set output dwp file name\n"));
2331 fprintf(fd
, _(" -v, --verbose Verbose output\n"));
2332 fprintf(fd
, _(" --verify-only Verify output file against"
2334 fprintf(fd
, _(" -V, --version Print version number\n"));
2336 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
2337 const char* report
= REPORT_BUGS_TO
;
2338 if (*report
!= '\0')
2339 fprintf(fd
, _("\nReport bugs to %s\n"), report
);
2343 // Report version information.
2348 // This output is intended to follow the GNU standards.
2349 printf("GNU dwp %s\n", BFD_VERSION_STRING
);
2350 printf(_("Copyright 2014 Free Software Foundation, Inc.\n"));
2352 This program is free software; you may redistribute it under the terms of\n\
2353 the GNU General Public License version 3 or (at your option) any later version.\n\
2354 This program has absolutely no warranty.\n"));
2361 main(int argc
, char** argv
)
2363 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
2364 setlocale(LC_MESSAGES
, "");
2366 #if defined (HAVE_SETLOCALE)
2367 setlocale(LC_CTYPE
, "");
2369 bindtextdomain(PACKAGE
, LOCALEDIR
);
2370 textdomain(PACKAGE
);
2372 program_name
= argv
[0];
2374 // Initialize the global parameters, to let random code get to the
2376 Errors
errors(program_name
);
2377 set_parameters_errors(&errors
);
2379 // Initialize gold's global options. We don't use these in
2380 // this program, but they need to be initialized so that
2381 // functions we call from libgold work properly.
2382 General_options options
;
2383 set_parameters_options(&options
);
2385 // In libiberty; expands @filename to the args in "filename".
2386 expandargv(&argc
, &argv
);
2388 // Collect file names and options.
2390 std::string output_filename
;
2391 const char* exe_filename
= NULL
;
2392 bool verbose
= false;
2393 bool verify_only
= false;
2395 while ((c
= getopt_long(argc
, argv
, "e:ho:vV", dwp_options
, NULL
)) != -1)
2400 usage(stdout
, EXIT_SUCCESS
);
2402 exe_filename
= optarg
;
2405 output_filename
.assign(optarg
);
2417 usage(stderr
, EXIT_FAILURE
);
2421 if (output_filename
.empty())
2423 if (exe_filename
== NULL
)
2424 gold_fatal(_("no output file specified"));
2425 output_filename
.assign(exe_filename
);
2426 output_filename
.append(".dwp");
2429 // Get list of .dwo files from the executable.
2430 if (exe_filename
!= NULL
)
2432 Dwo_file
exe_file(exe_filename
);
2433 exe_file
.read_executable(&files
);
2436 // Add any additional files listed on command line.
2437 for (int i
= optind
; i
< argc
; ++i
)
2438 files
.push_back(Dwo_file_entry(0, argv
[i
]));
2440 if (exe_filename
== NULL
&& files
.empty())
2441 gold_fatal(_("no input files and no executable specified"));
2445 // Get list of DWO files in the DWP file and compare with
2446 // references found in the EXE file.
2447 Dwo_file
dwp_file(output_filename
.c_str());
2448 bool ok
= dwp_file
.verify(files
);
2449 return ok
? EXIT_SUCCESS
: EXIT_FAILURE
;
2452 // Process each file, adding its contents to the output file.
2453 Dwp_output_file
output_file(output_filename
.c_str());
2454 for (File_list::const_iterator f
= files
.begin(); f
!= files
.end(); ++f
)
2457 fprintf(stderr
, "%s\n", f
->dwo_name
.c_str());
2458 Dwo_file
dwo_file(f
->dwo_name
.c_str());
2459 dwo_file
.read(&output_file
);
2461 output_file
.finalize();
2463 return EXIT_SUCCESS
;