1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <unordered_map>
25 #include "dwarf2/comp-unit.h"
26 #include "dwarf2/index-cache.h"
27 #include "dwarf2/section.h"
28 #include "filename-seen-cache.h"
29 #include "gdb_obstack.h"
30 #include "gdbsupport/hash_enum.h"
31 #include "gdbsupport/function-view.h"
34 /* Hold 'maintenance (set|show) dwarf' commands. */
35 extern struct cmd_list_element
*set_dwarf_cmdlist
;
36 extern struct cmd_list_element
*show_dwarf_cmdlist
;
40 int nr_uniq_abbrev_tables
;
42 int nr_symtab_sharers
;
43 int nr_stmt_less_type_units
;
44 int nr_all_type_units_reallocs
;
48 struct dwarf2_debug_sections
;
49 struct dwarf2_per_cu_data
;
51 struct mapped_debug_names
;
52 struct signatured_type
;
53 struct type_unit_group
;
55 /* One item on the queue of compilation units to read in full symbols
57 struct dwarf2_queue_item
59 dwarf2_queue_item (dwarf2_per_cu_data
*cu
, dwarf2_per_objfile
*per_objfile
,
62 per_objfile (per_objfile
),
63 pretend_language (lang
)
67 ~dwarf2_queue_item ();
69 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_item
);
71 dwarf2_per_cu_data
*per_cu
;
72 dwarf2_per_objfile
*per_objfile
;
73 enum language pretend_language
;
76 /* Some DWARF data can be shared across objfiles who share the same BFD,
77 this data is stored in this object.
79 Two dwarf2_per_objfile objects representing objfiles sharing the same BFD
80 will point to the same instance of dwarf2_per_bfd, unless the BFD requires
85 /* Construct a dwarf2_per_bfd for OBFD. NAMES points to the
86 dwarf2 section names, or is NULL if the standard ELF names are
87 used. CAN_COPY is true for formats where symbol
88 interposition is possible and so symbol values must follow copy
90 dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
, bool can_copy
);
94 DISABLE_COPY_AND_ASSIGN (dwarf2_per_bfd
);
96 /* Return the CU/TU given its index.
98 This is intended for loops like:
100 for (i = 0; i < (dwarf2_per_bfd->n_comp_units
101 + dwarf2_per_bfd->n_type_units); ++i)
103 dwarf2_per_cu_data *per_cu = dwarf2_per_bfd->get_cutu (i);
108 dwarf2_per_cu_data
*get_cutu (int index
);
110 /* Return the CU given its index.
111 This differs from get_cutu in that it's for when you know INDEX refers to a
113 dwarf2_per_cu_data
*get_cu (int index
);
115 /* Return the TU given its index.
116 This differs from get_cutu in that it's for when you know INDEX refers to a
118 signatured_type
*get_tu (int index
);
120 /* A convenience function to allocate a dwarf2_per_cu_data. The
121 returned object has its "index" field set properly. The object
122 is allocated on the dwarf2_per_bfd obstack. */
123 dwarf2_per_cu_data
*allocate_per_cu ();
125 /* A convenience function to allocate a signatured_type. The
126 returned object has its "index" field set properly. The object
127 is allocated on the dwarf2_per_bfd obstack. */
128 signatured_type
*allocate_signatured_type ();
130 /* Return the number of partial symtabs allocated with allocate_per_cu
131 and allocate_signatured_type so far. */
132 int num_psymtabs () const
133 { return m_num_psymtabs
; }
136 /* This function is mapped across the sections and remembers the
137 offset and size of each of the debugging sections we are
139 void locate_sections (bfd
*abfd
, asection
*sectp
,
140 const dwarf2_debug_sections
&names
);
143 /* The corresponding BFD. */
146 /* Objects that can be shared across objfiles are stored in this
147 obstack or on the psymtab obstack, while objects that are
148 objfile-specific are stored on the objfile obstack. */
149 auto_obstack obstack
;
151 dwarf2_section_info info
{};
152 dwarf2_section_info abbrev
{};
153 dwarf2_section_info line
{};
154 dwarf2_section_info loc
{};
155 dwarf2_section_info loclists
{};
156 dwarf2_section_info macinfo
{};
157 dwarf2_section_info macro
{};
158 dwarf2_section_info str
{};
159 dwarf2_section_info str_offsets
{};
160 dwarf2_section_info line_str
{};
161 dwarf2_section_info ranges
{};
162 dwarf2_section_info rnglists
{};
163 dwarf2_section_info addr
{};
164 dwarf2_section_info frame
{};
165 dwarf2_section_info eh_frame
{};
166 dwarf2_section_info gdb_index
{};
167 dwarf2_section_info debug_names
{};
168 dwarf2_section_info debug_aranges
{};
170 std::vector
<dwarf2_section_info
> types
;
172 /* Table of all the compilation units. This is used to locate
173 the target compilation unit of a particular reference. */
174 std::vector
<dwarf2_per_cu_data
*> all_comp_units
;
176 /* The .debug_types-related CUs (TUs). */
177 std::vector
<signatured_type
*> all_type_units
;
179 /* Table of struct type_unit_group objects.
180 The hash key is the DW_AT_stmt_list value. */
181 htab_up type_unit_groups
;
183 /* A table mapping .debug_types signatures to its signatured_type entry.
184 This is NULL if the .debug_types section hasn't been read in yet. */
185 htab_up signatured_types
;
187 /* Type unit statistics, to see how well the scaling improvements
189 struct tu_stats tu_stats
{};
191 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
192 This is NULL if the table hasn't been allocated yet. */
195 /* True if we've checked for whether there is a DWP file. */
196 bool dwp_checked
= false;
198 /* The DWP file if there is one, or NULL. */
199 std::unique_ptr
<struct dwp_file
> dwp_file
;
201 /* The shared '.dwz' file, if one exists. This is used when the
202 original data was compressed using 'dwz -m'. */
203 std::unique_ptr
<struct dwz_file
> dwz_file
;
205 /* Whether copy relocations are supported by this object format. */
208 /* A flag indicating whether this objfile has a section loaded at a
210 bool has_section_at_zero
= false;
212 /* True if we are using the mapped index,
213 or we are faking it for OBJF_READNOW's sake. */
214 bool using_index
= false;
216 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
217 std::unique_ptr
<mapped_index
> index_table
;
219 /* The mapped index, or NULL if .debug_names is missing or not being used. */
220 std::unique_ptr
<mapped_debug_names
> debug_names_table
;
222 /* When using index_table, this keeps track of all quick_file_names entries.
223 TUs typically share line table entries with a CU, so we maintain a
224 separate table of all line table entries to support the sharing.
225 Note that while there can be way more TUs than CUs, we've already
226 sorted all the TUs into "type unit groups", grouped by their
227 DW_AT_stmt_list value. Therefore the only sharing done here is with a
228 CU and its associated TU group if there is one. */
229 htab_up quick_file_names_table
;
231 /* Set during partial symbol reading, to prevent queueing of full
233 bool reading_partial_symbols
= false;
235 /* The CUs we recently read. */
236 std::vector
<dwarf2_per_cu_data
*> just_read_cus
;
238 /* Table containing all filenames. This is an optional because the
239 table is lazily constructed on first access. */
240 gdb::optional
<filename_seen_cache
> filenames_cache
;
242 /* If we loaded the index from an external file, this contains the
243 resources associated to the open file, memory mapping, etc. */
244 std::unique_ptr
<index_cache_resource
> index_cache_res
;
246 /* Mapping from abstract origin DIE to concrete DIEs that reference it as
247 DW_AT_abstract_origin. */
248 std::unordered_map
<sect_offset
, std::vector
<sect_offset
>,
249 gdb::hash_enum
<sect_offset
>>
250 abstract_to_concrete
;
252 /* CUs that are queued to be read. */
253 gdb::optional
<std::queue
<dwarf2_queue_item
>> queue
;
255 /* We keep a separate reference to the partial symtabs, in case we
256 are sharing them between objfiles. This is only set after
257 partial symbols have been read the first time. */
258 std::shared_ptr
<psymtab_storage
> partial_symtabs
;
260 /* The address map that is used by the DWARF index code. */
261 struct addrmap
*index_addrmap
= nullptr;
265 /* The total number of per_cu and signatured_type objects that have
266 been created so far for this reader. */
267 size_t m_num_psymtabs
= 0;
270 /* This is the per-objfile data associated with a type_unit_group. */
272 struct type_unit_group_unshareable
274 /* The compunit symtab.
275 Type units in a group needn't all be defined in the same source file,
276 so we create an essentially anonymous symtab as the compunit symtab. */
277 struct compunit_symtab
*compunit_symtab
= nullptr;
279 /* The number of symtabs from the line header.
280 The value here must match line_header.num_file_names. */
281 unsigned int num_symtabs
= 0;
283 /* The symbol tables for this TU (obtained from the files listed in
285 WARNING: The order of entries here must match the order of entries
286 in the line header. After the first TU using this type_unit_group, the
287 line header for the subsequent TUs is recreated from this. This is done
288 because we need to use the same symtabs for each TU using the same
289 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
290 there's no guarantee the line header doesn't have duplicate entries. */
291 struct symtab
**symtabs
= nullptr;
294 /* Collection of data recorded per objfile.
295 This hangs off of dwarf2_objfile_data_key.
297 Some DWARF data cannot (currently) be shared across objfiles. Such
298 data is stored in this object. */
300 struct dwarf2_per_objfile
302 dwarf2_per_objfile (struct objfile
*objfile
, dwarf2_per_bfd
*per_bfd
)
303 : objfile (objfile
), per_bfd (per_bfd
)
306 ~dwarf2_per_objfile ();
308 /* Return pointer to string at .debug_line_str offset as read from BUF.
309 BUF is assumed to be in a compilation unit described by CU_HEADER.
310 Return *BYTES_READ_PTR count of bytes read from BUF. */
311 const char *read_line_string (const gdb_byte
*buf
,
312 const struct comp_unit_head
*cu_header
,
313 unsigned int *bytes_read_ptr
);
315 /* Resize the M_SYMTABS vector to the needed size (the number of partial
316 symtabs allocated by the per-bfd). */
317 void resize_symtabs ()
319 /* The symtabs vector should only grow, not shrink. */
320 gdb_assert (per_bfd
->num_psymtabs () >= m_symtabs
.size ());
322 m_symtabs
.resize (per_bfd
->num_psymtabs ());
325 /* Return true if the symtab corresponding to PER_CU has been set,
327 bool symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const;
329 /* Return the compunit_symtab associated to PER_CU, if it has been created. */
330 compunit_symtab
*get_symtab (const dwarf2_per_cu_data
*per_cu
) const;
332 /* Set the compunit_symtab associated to PER_CU. */
333 void set_symtab (const dwarf2_per_cu_data
*per_cu
, compunit_symtab
*symtab
);
335 /* Get the type_unit_group_unshareable corresponding to TU_GROUP. If one
336 does not exist, create it. */
337 type_unit_group_unshareable
*get_type_unit_group_unshareable
338 (type_unit_group
*tu_group
);
340 struct type
*get_type_for_signatured_type (signatured_type
*sig_type
) const;
342 void set_type_for_signatured_type (signatured_type
*sig_type
,
345 /* Find an integer type SIZE_IN_BYTES bytes in size and return it.
346 UNSIGNED_P controls if the integer is unsigned or not. */
347 struct type
*int_type (int size_in_bytes
, bool unsigned_p
) const;
349 /* Get the dwarf2_cu matching PER_CU for this objfile. */
350 dwarf2_cu
*get_cu (dwarf2_per_cu_data
*per_cu
);
352 /* Set the dwarf2_cu matching PER_CU for this objfile. */
353 void set_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_cu
*cu
);
355 /* Remove/free the dwarf2_cu matching PER_CU for this objfile. */
356 void remove_cu (dwarf2_per_cu_data
*per_cu
);
358 /* Free all cached compilation units. */
359 void remove_all_cus ();
361 /* Increase the age counter on each CU compilation unit and free
362 any that are too old. */
363 void age_comp_units ();
366 struct objfile
*objfile
;
368 /* Pointer to the data that is (possibly) shared between this objfile and
369 other objfiles backed by the same BFD. */
370 struct dwarf2_per_bfd
*per_bfd
;
372 /* Table mapping type DIEs to their struct type *.
373 This is nullptr if not allocated yet.
374 The mapping is done via (CU/TU + DIE offset) -> type. */
375 htab_up die_type_hash
;
377 /* Table containing line_header indexed by offset and offset_in_dwz. */
378 htab_up line_header_hash
;
381 /* Hold the corresponding compunit_symtab for each CU or TU. This
382 is indexed by dwarf2_per_cu_data::index. A NULL value means
383 that the CU/TU has not been expanded yet. */
384 std::vector
<compunit_symtab
*> m_symtabs
;
386 /* Map from a type unit group to the corresponding unshared
388 typedef std::unique_ptr
<type_unit_group_unshareable
>
389 type_unit_group_unshareable_up
;
391 std::unordered_map
<type_unit_group
*, type_unit_group_unshareable_up
>
394 /* Map from signatured types to the corresponding struct type. */
395 std::unordered_map
<signatured_type
*, struct type
*> m_type_map
;
397 /* Map from the objfile-independent dwarf2_per_cu_data instances to the
398 corresponding objfile-dependent dwarf2_cu instances. */
399 std::unordered_map
<dwarf2_per_cu_data
*, dwarf2_cu
*> m_dwarf2_cus
;
402 /* Get the dwarf2_per_objfile associated to OBJFILE. */
404 dwarf2_per_objfile
*get_dwarf2_per_objfile (struct objfile
*objfile
);
406 /* A partial symtab specialized for DWARF. */
407 struct dwarf2_psymtab
: public partial_symtab
409 dwarf2_psymtab (const char *filename
,
410 psymtab_storage
*partial_symtabs
,
411 objfile_per_bfd_storage
*objfile_per_bfd
,
412 dwarf2_per_cu_data
*per_cu
)
413 : partial_symtab (filename
, partial_symtabs
, objfile_per_bfd
, 0),
418 void read_symtab (struct objfile
*) override
;
419 void expand_psymtab (struct objfile
*) override
;
420 bool readin_p (struct objfile
*) const override
;
421 compunit_symtab
*get_compunit_symtab (struct objfile
*) const override
;
423 struct dwarf2_per_cu_data
*per_cu_data
;
426 /* Persistent data held for a compilation unit, even when not
427 processing it. We put a pointer to this structure in the
430 struct dwarf2_per_cu_data
432 /* The start offset and length of this compilation unit.
433 NOTE: Unlike comp_unit_head.length, this length includes
435 If the DIE refers to a DWO file, this is always of the original die,
437 sect_offset sect_off
;
440 /* DWARF standard version this data has been read from (such as 4 or 5). */
443 /* Flag indicating this compilation unit will be read in before
444 any of the current compilation units are processed. */
445 unsigned int queued
: 1;
447 /* This flag will be set when reading partial DIEs if we need to load
448 absolutely all DIEs for this compilation unit, instead of just the ones
449 we think are interesting. It gets set if we look for a DIE in the
450 hash table and don't find it. */
451 unsigned int load_all_dies
: 1;
453 /* Non-zero if this CU is from .debug_types.
454 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
456 unsigned int is_debug_types
: 1;
458 /* Non-zero if this CU is from the .dwz file. */
459 unsigned int is_dwz
: 1;
461 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
462 This flag is only valid if is_debug_types is true.
463 We can't read a CU directly from a DWO file: There are required
464 attributes in the stub. */
465 unsigned int reading_dwo_directly
: 1;
467 /* Non-zero if the TU has been read.
468 This is used to assist the "Stay in DWO Optimization" for Fission:
469 When reading a DWO, it's faster to read TUs from the DWO instead of
470 fetching them from random other DWOs (due to comdat folding).
471 If the TU has already been read, the optimization is unnecessary
472 (and unwise - we don't want to change where gdb thinks the TU lives
474 This flag is only valid if is_debug_types is true. */
475 unsigned int tu_read
: 1;
477 /* Our index in the unshared "symtabs" vector. */
480 /* The section this CU/TU lives in.
481 If the DIE refers to a DWO file, this is always the original die,
483 struct dwarf2_section_info
*section
;
485 /* The unit type of this CU. */
486 enum dwarf_unit_type unit_type
;
488 /* The language of this CU. */
491 /* Backlink to the owner of this. */
492 dwarf2_per_bfd
*per_bfd
;
494 /* DWARF header of this CU. Note that dwarf2_cu reads its own version of the
495 header, which may differ from this one, since it may pass rcuh_kind::TYPE
496 to read_comp_unit_head, whereas for dwarf2_per_cu_data we always pass
499 Don't access this field directly, use the get_header method instead. It
500 should be private, but we can't make it private at the moment. */
501 mutable comp_unit_head m_header
;
503 /* True if HEADER has been read in.
505 Don't access this field directly. It should be private, but we can't make
506 it private at the moment. */
507 mutable bool m_header_read_in
;
509 /* When dwarf2_per_bfd::using_index is true, the 'quick' field
510 is active. Otherwise, the 'psymtab' field is active. */
513 /* The partial symbol table associated with this compilation unit,
514 or NULL for unread partial units. */
515 dwarf2_psymtab
*psymtab
;
517 /* Data needed by the "quick" functions. */
518 struct dwarf2_per_cu_quick_data
*quick
;
521 /* The CUs we import using DW_TAG_imported_unit. This is filled in
522 while reading psymtabs, used to compute the psymtab dependencies,
523 and then cleared. Then it is filled in again while reading full
524 symbols, and only deleted when the objfile is destroyed.
526 This is also used to work around a difference between the way gold
527 generates .gdb_index version <=7 and the way gdb does. Arguably this
528 is a gold bug. For symbols coming from TUs, gold records in the index
529 the CU that includes the TU instead of the TU itself. This breaks
530 dw2_lookup_symbol: It assumes that if the index says symbol X lives
531 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
532 will find X. Alas TUs live in their own symtab, so after expanding CU Y
533 we need to look in TU Z to find X. Fortunately, this is akin to
534 DW_TAG_imported_unit, so we just use the same mechanism: For
535 .gdb_index version <=7 this also records the TUs that the CU referred
536 to. Concurrently with this change gdb was modified to emit version 8
537 indices so we only pay a price for gold generated indices.
538 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
540 This currently needs to be a public member due to how
541 dwarf2_per_cu_data is allocated and used. Ideally in future things
542 could be refactored to make this private. Until then please try to
543 avoid direct access to this member, and instead use the helper
545 std::vector
<dwarf2_per_cu_data
*> *imported_symtabs
;
547 /* Return true of IMPORTED_SYMTABS is empty or not yet allocated. */
548 bool imported_symtabs_empty () const
550 return (imported_symtabs
== nullptr || imported_symtabs
->empty ());
553 /* Push P to the back of IMPORTED_SYMTABS, allocated IMPORTED_SYMTABS
554 first if required. */
555 void imported_symtabs_push (dwarf2_per_cu_data
*p
)
557 if (imported_symtabs
== nullptr)
558 imported_symtabs
= new std::vector
<dwarf2_per_cu_data
*>;
559 imported_symtabs
->push_back (p
);
562 /* Return the size of IMPORTED_SYMTABS if it is allocated, otherwise
564 size_t imported_symtabs_size () const
566 if (imported_symtabs
== nullptr)
568 return imported_symtabs
->size ();
571 /* Delete IMPORTED_SYMTABS and set the pointer back to nullptr. */
572 void imported_symtabs_free ()
574 delete imported_symtabs
;
575 imported_symtabs
= nullptr;
578 /* Get the header of this per_cu, reading it if necessary. */
579 const comp_unit_head
*get_header () const;
581 /* Return the address size given in the compilation unit header for
583 int addr_size () const;
585 /* Return the offset size given in the compilation unit header for
587 int offset_size () const;
589 /* Return the DW_FORM_ref_addr size given in the compilation unit
590 header for this CU. */
591 int ref_addr_size () const;
593 /* Return DWARF version number of this CU. */
594 short version () const
596 return dwarf_version
;
599 /* A type unit group has a per_cu object that is recognized by
600 having no section. */
601 bool type_unit_group_p () const
603 return section
== nullptr;
607 /* Entry in the signatured_types hash table. */
609 struct signatured_type
611 /* The "per_cu" object of this type.
612 This struct is used iff per_cu.is_debug_types.
613 N.B.: This is the first member so that it's easy to convert pointers
615 struct dwarf2_per_cu_data per_cu
;
617 /* The type's signature. */
620 /* Offset in the TU of the type's DIE, as read from the TU header.
621 If this TU is a DWO stub and the definition lives in a DWO file
622 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
623 cu_offset type_offset_in_tu
;
625 /* Offset in the section of the type's DIE.
626 If the definition lives in a DWO file, this is the offset in the
627 .debug_types.dwo section.
628 The value is zero until the actual value is known.
629 Zero is otherwise not a valid section offset. */
630 sect_offset type_offset_in_section
;
632 /* Type units are grouped by their DW_AT_stmt_list entry so that they
633 can share them. This points to the containing symtab. */
634 struct type_unit_group
*type_unit_group
;
636 /* Containing DWO unit.
637 This field is valid iff per_cu.reading_dwo_directly. */
638 struct dwo_unit
*dwo_unit
;
641 /* Return the type of the DIE at DIE_OFFSET in the CU named by
644 struct type
*dwarf2_get_die_type (cu_offset die_offset
,
645 dwarf2_per_cu_data
*per_cu
,
646 dwarf2_per_objfile
*per_objfile
);
648 /* Given an index in .debug_addr, fetch the value.
649 NOTE: This can be called during dwarf expression evaluation,
650 long after the debug information has been read, and thus per_cu->cu
651 may no longer exist. */
653 CORE_ADDR
dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
654 dwarf2_per_objfile
*per_objfile
,
655 unsigned int addr_index
);
657 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
658 Returned value is intended for DW_OP_call*. Returned
659 dwarf2_locexpr_baton->data has lifetime of
660 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
662 struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_sect_off
663 (sect_offset sect_off
, dwarf2_per_cu_data
*per_cu
,
664 dwarf2_per_objfile
*per_objfile
,
665 gdb::function_view
<CORE_ADDR ()> get_frame_pc
,
666 bool resolve_abstract_p
= false);
668 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
671 struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off
672 (cu_offset offset_in_cu
, dwarf2_per_cu_data
*per_cu
,
673 dwarf2_per_objfile
*per_objfile
,
674 gdb::function_view
<CORE_ADDR ()> get_frame_pc
);
676 /* If the DIE at SECT_OFF in PER_CU has a DW_AT_const_value, return a
677 pointer to the constant bytes and set LEN to the length of the
678 data. If memory is needed, allocate it on OBSTACK. If the DIE
679 does not have a DW_AT_const_value, return NULL. */
681 extern const gdb_byte
*dwarf2_fetch_constant_bytes
682 (sect_offset sect_off
, dwarf2_per_cu_data
*per_cu
,
683 dwarf2_per_objfile
*per_objfile
, obstack
*obstack
,
686 /* Return the type of the die at SECT_OFF in PER_CU. Return NULL if no
687 valid type for this die is found. */
689 struct type
*dwarf2_fetch_die_type_sect_off
690 (sect_offset sect_off
, dwarf2_per_cu_data
*per_cu
,
691 dwarf2_per_objfile
*per_objfile
);
693 /* When non-zero, dump line number entries as they are read in. */
694 extern unsigned int dwarf_line_debug
;
696 /* Dwarf2 sections that can be accessed by dwarf2_get_section_info. */
697 enum dwarf2_section_enum
{
702 extern void dwarf2_get_section_info (struct objfile
*,
703 enum dwarf2_section_enum
,
704 asection
**, const gdb_byte
**,
707 #endif /* DWARF2READ_H */