Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
61baf725 | 3 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 | 55 | #include "typeprint.h" |
ccefe4c4 | 56 | #include "psympriv.h" |
53ce3c39 | 57 | #include <sys/stat.h> |
96d19272 | 58 | #include "completer.h" |
34eaf542 | 59 | #include "vec.h" |
98bfdba5 | 60 | #include "c-lang.h" |
a766d390 | 61 | #include "go-lang.h" |
98bfdba5 | 62 | #include "valprint.h" |
3019eac3 | 63 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 64 | #include "gdb/gdb-index.h" |
60d5a603 | 65 | #include <ctype.h> |
cbb099e8 | 66 | #include "gdb_bfd.h" |
4357ac6c | 67 | #include "f-lang.h" |
05cba821 | 68 | #include "source.h" |
614c279d | 69 | #include "filestuff.h" |
dc294be5 | 70 | #include "build-id.h" |
22cee43f | 71 | #include "namespace.h" |
bef155c3 | 72 | #include "common/gdb_unlinker.h" |
14bc53a8 | 73 | #include "common/function-view.h" |
ecfb656c PA |
74 | #include "common/gdb_optional.h" |
75 | #include "common/underlying.h" | |
d5722aa2 | 76 | #include "common/byte-vector.h" |
bbf2f4df | 77 | #include "filename-seen-cache.h" |
c906108c | 78 | #include <fcntl.h> |
c906108c | 79 | #include <sys/types.h> |
325fac50 | 80 | #include <algorithm> |
bc8f2430 JK |
81 | #include <unordered_set> |
82 | #include <unordered_map> | |
d8151005 | 83 | |
34eaf542 TT |
84 | typedef struct symbol *symbolp; |
85 | DEF_VEC_P (symbolp); | |
86 | ||
73be47f5 DE |
87 | /* When == 1, print basic high level tracing messages. |
88 | When > 1, be more verbose. | |
b4f54984 DE |
89 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
90 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 91 | |
d97bc12b | 92 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 93 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 94 | |
27e0867f DE |
95 | /* When non-zero, dump line number entries as they are read in. */ |
96 | static unsigned int dwarf_line_debug = 0; | |
97 | ||
900e11f9 JK |
98 | /* When non-zero, cross-check physname against demangler. */ |
99 | static int check_physname = 0; | |
100 | ||
481860b3 | 101 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 102 | static int use_deprecated_index_sections = 0; |
481860b3 | 103 | |
6502dd73 DJ |
104 | static const struct objfile_data *dwarf2_objfile_data_key; |
105 | ||
f1e6e072 TT |
106 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
107 | ||
108 | static int dwarf2_locexpr_index; | |
109 | static int dwarf2_loclist_index; | |
110 | static int dwarf2_locexpr_block_index; | |
111 | static int dwarf2_loclist_block_index; | |
112 | ||
73869dc2 DE |
113 | /* A descriptor for dwarf sections. |
114 | ||
115 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
116 | scanned. BUFFER, READIN are filled in later when the section is read. | |
117 | If the section contained compressed data then SIZE is updated to record | |
118 | the uncompressed size of the section. | |
119 | ||
120 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
121 | creating the concept of virtual sections contained within a real section. | |
122 | In DWP V2 the sections of the input DWO files are concatenated together | |
123 | into one section, but section offsets are kept relative to the original | |
124 | input section. | |
125 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
126 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
127 | describe the virtual section. */ | |
128 | ||
dce234bc PP |
129 | struct dwarf2_section_info |
130 | { | |
73869dc2 DE |
131 | union |
132 | { | |
e5aa3347 | 133 | /* If this is a real section, the bfd section. */ |
049412e3 | 134 | asection *section; |
73869dc2 | 135 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 136 | section. */ |
73869dc2 DE |
137 | struct dwarf2_section_info *containing_section; |
138 | } s; | |
19ac8c2e | 139 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 140 | const gdb_byte *buffer; |
73869dc2 | 141 | /* The size of the section, real or virtual. */ |
dce234bc | 142 | bfd_size_type size; |
73869dc2 DE |
143 | /* If this is a virtual section, the offset in the real section. |
144 | Only valid if is_virtual. */ | |
145 | bfd_size_type virtual_offset; | |
be391dca | 146 | /* True if we have tried to read this section. */ |
73869dc2 DE |
147 | char readin; |
148 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 149 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 150 | char is_virtual; |
dce234bc PP |
151 | }; |
152 | ||
8b70b953 TT |
153 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
154 | DEF_VEC_O (dwarf2_section_info_def); | |
155 | ||
9291a0cd TT |
156 | /* All offsets in the index are of this type. It must be |
157 | architecture-independent. */ | |
158 | typedef uint32_t offset_type; | |
159 | ||
160 | DEF_VEC_I (offset_type); | |
161 | ||
156942c7 DE |
162 | /* Ensure only legit values are used. */ |
163 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
164 | do { \ | |
165 | gdb_assert ((unsigned int) (value) <= 1); \ | |
166 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
167 | } while (0) | |
168 | ||
169 | /* Ensure only legit values are used. */ | |
170 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
171 | do { \ | |
172 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
173 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
174 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
175 | } while (0) | |
176 | ||
177 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
178 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
179 | do { \ | |
180 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
181 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
182 | } while (0) | |
183 | ||
9291a0cd TT |
184 | /* A description of the mapped index. The file format is described in |
185 | a comment by the code that writes the index. */ | |
186 | struct mapped_index | |
187 | { | |
559a7a62 JK |
188 | /* Index data format version. */ |
189 | int version; | |
190 | ||
9291a0cd TT |
191 | /* The total length of the buffer. */ |
192 | off_t total_size; | |
b11b1f88 | 193 | |
9291a0cd TT |
194 | /* A pointer to the address table data. */ |
195 | const gdb_byte *address_table; | |
b11b1f88 | 196 | |
9291a0cd TT |
197 | /* Size of the address table data in bytes. */ |
198 | offset_type address_table_size; | |
b11b1f88 | 199 | |
3876f04e DE |
200 | /* The symbol table, implemented as a hash table. */ |
201 | const offset_type *symbol_table; | |
b11b1f88 | 202 | |
9291a0cd | 203 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 204 | offset_type symbol_table_slots; |
b11b1f88 | 205 | |
9291a0cd TT |
206 | /* A pointer to the constant pool. */ |
207 | const char *constant_pool; | |
208 | }; | |
209 | ||
95554aad TT |
210 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
211 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
212 | ||
52059ffd TT |
213 | struct tu_stats |
214 | { | |
215 | int nr_uniq_abbrev_tables; | |
216 | int nr_symtabs; | |
217 | int nr_symtab_sharers; | |
218 | int nr_stmt_less_type_units; | |
219 | int nr_all_type_units_reallocs; | |
220 | }; | |
221 | ||
9cdd5dbd DE |
222 | /* Collection of data recorded per objfile. |
223 | This hangs off of dwarf2_objfile_data_key. */ | |
224 | ||
6502dd73 DJ |
225 | struct dwarf2_per_objfile |
226 | { | |
330cdd98 PA |
227 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
228 | dwarf2 section names, or is NULL if the standard ELF names are | |
229 | used. */ | |
230 | dwarf2_per_objfile (struct objfile *objfile, | |
231 | const dwarf2_debug_sections *names); | |
ae038cb0 | 232 | |
330cdd98 PA |
233 | ~dwarf2_per_objfile (); |
234 | ||
d6541620 | 235 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
236 | |
237 | /* Free all cached compilation units. */ | |
238 | void free_cached_comp_units (); | |
239 | private: | |
240 | /* This function is mapped across the sections and remembers the | |
241 | offset and size of each of the debugging sections we are | |
242 | interested in. */ | |
243 | void locate_sections (bfd *abfd, asection *sectp, | |
244 | const dwarf2_debug_sections &names); | |
245 | ||
246 | public: | |
247 | dwarf2_section_info info {}; | |
248 | dwarf2_section_info abbrev {}; | |
249 | dwarf2_section_info line {}; | |
250 | dwarf2_section_info loc {}; | |
251 | dwarf2_section_info loclists {}; | |
252 | dwarf2_section_info macinfo {}; | |
253 | dwarf2_section_info macro {}; | |
254 | dwarf2_section_info str {}; | |
255 | dwarf2_section_info line_str {}; | |
256 | dwarf2_section_info ranges {}; | |
257 | dwarf2_section_info rnglists {}; | |
258 | dwarf2_section_info addr {}; | |
259 | dwarf2_section_info frame {}; | |
260 | dwarf2_section_info eh_frame {}; | |
261 | dwarf2_section_info gdb_index {}; | |
262 | ||
263 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 264 | |
be391dca | 265 | /* Back link. */ |
330cdd98 | 266 | struct objfile *objfile = NULL; |
be391dca | 267 | |
d467dd73 | 268 | /* Table of all the compilation units. This is used to locate |
10b3939b | 269 | the target compilation unit of a particular reference. */ |
330cdd98 | 270 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
271 | |
272 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 273 | int n_comp_units = 0; |
ae038cb0 | 274 | |
1fd400ff | 275 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 276 | int n_type_units = 0; |
1fd400ff | 277 | |
6aa5f3a6 DE |
278 | /* The number of elements allocated in all_type_units. |
279 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 280 | int n_allocated_type_units = 0; |
6aa5f3a6 | 281 | |
a2ce51a0 DE |
282 | /* The .debug_types-related CUs (TUs). |
283 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 284 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 285 | |
f4dc4d17 DE |
286 | /* Table of struct type_unit_group objects. |
287 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 288 | htab_t type_unit_groups {}; |
72dca2f5 | 289 | |
348e048f DE |
290 | /* A table mapping .debug_types signatures to its signatured_type entry. |
291 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 292 | htab_t signatured_types {}; |
348e048f | 293 | |
f4dc4d17 DE |
294 | /* Type unit statistics, to see how well the scaling improvements |
295 | are doing. */ | |
330cdd98 | 296 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
297 | |
298 | /* A chain of compilation units that are currently read in, so that | |
299 | they can be freed later. */ | |
330cdd98 | 300 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 301 | |
3019eac3 DE |
302 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
303 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 304 | htab_t dwo_files {}; |
3019eac3 | 305 | |
330cdd98 PA |
306 | /* True if we've checked for whether there is a DWP file. */ |
307 | bool dwp_checked = false; | |
80626a55 DE |
308 | |
309 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 310 | struct dwp_file *dwp_file = NULL; |
80626a55 | 311 | |
36586728 TT |
312 | /* The shared '.dwz' file, if one exists. This is used when the |
313 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 314 | struct dwz_file *dwz_file = NULL; |
36586728 | 315 | |
330cdd98 | 316 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 317 | VMA of 0. */ |
330cdd98 | 318 | bool has_section_at_zero = false; |
9291a0cd | 319 | |
ae2de4f8 DE |
320 | /* True if we are using the mapped index, |
321 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 322 | bool using_index = false; |
9291a0cd | 323 | |
ae2de4f8 | 324 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 325 | mapped_index *index_table = NULL; |
98bfdba5 | 326 | |
7b9f3c50 | 327 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
328 | TUs typically share line table entries with a CU, so we maintain a |
329 | separate table of all line table entries to support the sharing. | |
330 | Note that while there can be way more TUs than CUs, we've already | |
331 | sorted all the TUs into "type unit groups", grouped by their | |
332 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
333 | CU and its associated TU group if there is one. */ | |
330cdd98 | 334 | htab_t quick_file_names_table {}; |
7b9f3c50 | 335 | |
98bfdba5 PA |
336 | /* Set during partial symbol reading, to prevent queueing of full |
337 | symbols. */ | |
330cdd98 | 338 | bool reading_partial_symbols = false; |
673bfd45 | 339 | |
dee91e82 | 340 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 341 | This is NULL if not allocated yet. |
02142a6c | 342 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 343 | htab_t die_type_hash {}; |
95554aad TT |
344 | |
345 | /* The CUs we recently read. */ | |
330cdd98 | 346 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
347 | |
348 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 349 | htab_t line_header_hash {}; |
bbf2f4df PA |
350 | |
351 | /* Table containing all filenames. This is an optional because the | |
352 | table is lazily constructed on first access. */ | |
353 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
354 | }; |
355 | ||
356 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 357 | |
251d32d9 | 358 | /* Default names of the debugging sections. */ |
c906108c | 359 | |
233a11ab CS |
360 | /* Note that if the debugging section has been compressed, it might |
361 | have a name like .zdebug_info. */ | |
362 | ||
9cdd5dbd DE |
363 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
364 | { | |
251d32d9 TG |
365 | { ".debug_info", ".zdebug_info" }, |
366 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
367 | { ".debug_line", ".zdebug_line" }, | |
368 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 369 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 370 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 371 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 372 | { ".debug_str", ".zdebug_str" }, |
43988095 | 373 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 374 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 375 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 376 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 377 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
378 | { ".debug_frame", ".zdebug_frame" }, |
379 | { ".eh_frame", NULL }, | |
24d3216f TT |
380 | { ".gdb_index", ".zgdb_index" }, |
381 | 23 | |
251d32d9 | 382 | }; |
c906108c | 383 | |
80626a55 | 384 | /* List of DWO/DWP sections. */ |
3019eac3 | 385 | |
80626a55 | 386 | static const struct dwop_section_names |
3019eac3 DE |
387 | { |
388 | struct dwarf2_section_names abbrev_dwo; | |
389 | struct dwarf2_section_names info_dwo; | |
390 | struct dwarf2_section_names line_dwo; | |
391 | struct dwarf2_section_names loc_dwo; | |
43988095 | 392 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
393 | struct dwarf2_section_names macinfo_dwo; |
394 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
395 | struct dwarf2_section_names str_dwo; |
396 | struct dwarf2_section_names str_offsets_dwo; | |
397 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
398 | struct dwarf2_section_names cu_index; |
399 | struct dwarf2_section_names tu_index; | |
3019eac3 | 400 | } |
80626a55 | 401 | dwop_section_names = |
3019eac3 DE |
402 | { |
403 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
404 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
405 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
406 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 407 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
408 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
409 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
410 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
411 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
412 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
413 | { ".debug_cu_index", ".zdebug_cu_index" }, |
414 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
415 | }; |
416 | ||
c906108c SS |
417 | /* local data types */ |
418 | ||
107d2387 AC |
419 | /* The data in a compilation unit header, after target2host |
420 | translation, looks like this. */ | |
c906108c | 421 | struct comp_unit_head |
a738430d | 422 | { |
c764a876 | 423 | unsigned int length; |
a738430d | 424 | short version; |
a738430d MK |
425 | unsigned char addr_size; |
426 | unsigned char signed_addr_p; | |
9c541725 | 427 | sect_offset abbrev_sect_off; |
57349743 | 428 | |
a738430d MK |
429 | /* Size of file offsets; either 4 or 8. */ |
430 | unsigned int offset_size; | |
57349743 | 431 | |
a738430d MK |
432 | /* Size of the length field; either 4 or 12. */ |
433 | unsigned int initial_length_size; | |
57349743 | 434 | |
43988095 JK |
435 | enum dwarf_unit_type unit_type; |
436 | ||
a738430d MK |
437 | /* Offset to the first byte of this compilation unit header in the |
438 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 439 | sect_offset sect_off; |
57349743 | 440 | |
d00adf39 DE |
441 | /* Offset to first die in this cu from the start of the cu. |
442 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 443 | cu_offset first_die_cu_offset; |
43988095 JK |
444 | |
445 | /* 64-bit signature of this type unit - it is valid only for | |
446 | UNIT_TYPE DW_UT_type. */ | |
447 | ULONGEST signature; | |
448 | ||
449 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 450 | cu_offset type_cu_offset_in_tu; |
a738430d | 451 | }; |
c906108c | 452 | |
3da10d80 KS |
453 | /* Type used for delaying computation of method physnames. |
454 | See comments for compute_delayed_physnames. */ | |
455 | struct delayed_method_info | |
456 | { | |
457 | /* The type to which the method is attached, i.e., its parent class. */ | |
458 | struct type *type; | |
459 | ||
460 | /* The index of the method in the type's function fieldlists. */ | |
461 | int fnfield_index; | |
462 | ||
463 | /* The index of the method in the fieldlist. */ | |
464 | int index; | |
465 | ||
466 | /* The name of the DIE. */ | |
467 | const char *name; | |
468 | ||
469 | /* The DIE associated with this method. */ | |
470 | struct die_info *die; | |
471 | }; | |
472 | ||
473 | typedef struct delayed_method_info delayed_method_info; | |
474 | DEF_VEC_O (delayed_method_info); | |
475 | ||
e7c27a73 DJ |
476 | /* Internal state when decoding a particular compilation unit. */ |
477 | struct dwarf2_cu | |
478 | { | |
479 | /* The objfile containing this compilation unit. */ | |
480 | struct objfile *objfile; | |
481 | ||
d00adf39 | 482 | /* The header of the compilation unit. */ |
e7c27a73 | 483 | struct comp_unit_head header; |
e142c38c | 484 | |
d00adf39 DE |
485 | /* Base address of this compilation unit. */ |
486 | CORE_ADDR base_address; | |
487 | ||
488 | /* Non-zero if base_address has been set. */ | |
489 | int base_known; | |
490 | ||
e142c38c DJ |
491 | /* The language we are debugging. */ |
492 | enum language language; | |
493 | const struct language_defn *language_defn; | |
494 | ||
b0f35d58 DL |
495 | const char *producer; |
496 | ||
e142c38c DJ |
497 | /* The generic symbol table building routines have separate lists for |
498 | file scope symbols and all all other scopes (local scopes). So | |
499 | we need to select the right one to pass to add_symbol_to_list(). | |
500 | We do it by keeping a pointer to the correct list in list_in_scope. | |
501 | ||
502 | FIXME: The original dwarf code just treated the file scope as the | |
503 | first local scope, and all other local scopes as nested local | |
504 | scopes, and worked fine. Check to see if we really need to | |
505 | distinguish these in buildsym.c. */ | |
506 | struct pending **list_in_scope; | |
507 | ||
433df2d4 DE |
508 | /* The abbrev table for this CU. |
509 | Normally this points to the abbrev table in the objfile. | |
510 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
511 | struct abbrev_table *abbrev_table; | |
72bf9492 | 512 | |
b64f50a1 JK |
513 | /* Hash table holding all the loaded partial DIEs |
514 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
515 | htab_t partial_dies; |
516 | ||
517 | /* Storage for things with the same lifetime as this read-in compilation | |
518 | unit, including partial DIEs. */ | |
519 | struct obstack comp_unit_obstack; | |
520 | ||
ae038cb0 DJ |
521 | /* When multiple dwarf2_cu structures are living in memory, this field |
522 | chains them all together, so that they can be released efficiently. | |
523 | We will probably also want a generation counter so that most-recently-used | |
524 | compilation units are cached... */ | |
525 | struct dwarf2_per_cu_data *read_in_chain; | |
526 | ||
69d751e3 | 527 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
528 | struct dwarf2_per_cu_data *per_cu; |
529 | ||
530 | /* How many compilation units ago was this CU last referenced? */ | |
531 | int last_used; | |
532 | ||
b64f50a1 JK |
533 | /* A hash table of DIE cu_offset for following references with |
534 | die_info->offset.sect_off as hash. */ | |
51545339 | 535 | htab_t die_hash; |
10b3939b DJ |
536 | |
537 | /* Full DIEs if read in. */ | |
538 | struct die_info *dies; | |
539 | ||
540 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
541 | units referenced by this one. Only set during full symbol processing; | |
542 | partial symbol tables do not have dependencies. */ | |
543 | htab_t dependencies; | |
544 | ||
cb1df416 DJ |
545 | /* Header data from the line table, during full symbol processing. */ |
546 | struct line_header *line_header; | |
4c8aa72d PA |
547 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
548 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
549 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
550 | to the line header as long as this DIE is being processed. See | |
551 | process_die_scope. */ | |
552 | die_info *line_header_die_owner; | |
cb1df416 | 553 | |
3da10d80 KS |
554 | /* A list of methods which need to have physnames computed |
555 | after all type information has been read. */ | |
556 | VEC (delayed_method_info) *method_list; | |
557 | ||
96408a79 SA |
558 | /* To be copied to symtab->call_site_htab. */ |
559 | htab_t call_site_htab; | |
560 | ||
034e5797 DE |
561 | /* Non-NULL if this CU came from a DWO file. |
562 | There is an invariant here that is important to remember: | |
563 | Except for attributes copied from the top level DIE in the "main" | |
564 | (or "stub") file in preparation for reading the DWO file | |
565 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
566 | Either there isn't a DWO file (in which case this is NULL and the point | |
567 | is moot), or there is and either we're not going to read it (in which | |
568 | case this is NULL) or there is and we are reading it (in which case this | |
569 | is non-NULL). */ | |
3019eac3 DE |
570 | struct dwo_unit *dwo_unit; |
571 | ||
572 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
573 | (zero is a valid value though). | |
1dbab08b | 574 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
575 | ULONGEST addr_base; |
576 | ||
2e3cf129 DE |
577 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
578 | (zero is a valid value though). | |
1dbab08b | 579 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 580 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
581 | be used without needing to know whether DWO files are in use or not. |
582 | N.B. This does not apply to DW_AT_ranges appearing in | |
583 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
584 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
585 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
586 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
587 | ULONGEST ranges_base; |
588 | ||
ae038cb0 DJ |
589 | /* Mark used when releasing cached dies. */ |
590 | unsigned int mark : 1; | |
591 | ||
8be455d7 JK |
592 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
593 | This test is imperfect as there may exist optimized debug code not using | |
594 | any location list and still facing inlining issues if handled as | |
595 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 596 | unsigned int has_loclist : 1; |
ba919b58 | 597 | |
1b80a9fa JK |
598 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
599 | if all the producer_is_* fields are valid. This information is cached | |
600 | because profiling CU expansion showed excessive time spent in | |
601 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
602 | unsigned int checked_producer : 1; |
603 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 604 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 605 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
606 | |
607 | /* When set, the file that we're processing is known to have | |
608 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
609 | this information, but later versions do. */ | |
610 | ||
611 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
612 | }; |
613 | ||
10b3939b DJ |
614 | /* Persistent data held for a compilation unit, even when not |
615 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 616 | read_symtab_private field of the psymtab. */ |
10b3939b | 617 | |
ae038cb0 DJ |
618 | struct dwarf2_per_cu_data |
619 | { | |
36586728 | 620 | /* The start offset and length of this compilation unit. |
45452591 | 621 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
622 | initial_length_size. |
623 | If the DIE refers to a DWO file, this is always of the original die, | |
624 | not the DWO file. */ | |
9c541725 | 625 | sect_offset sect_off; |
36586728 | 626 | unsigned int length; |
ae038cb0 | 627 | |
43988095 JK |
628 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
629 | short dwarf_version; | |
630 | ||
ae038cb0 DJ |
631 | /* Flag indicating this compilation unit will be read in before |
632 | any of the current compilation units are processed. */ | |
c764a876 | 633 | unsigned int queued : 1; |
ae038cb0 | 634 | |
0d99eb77 DE |
635 | /* This flag will be set when reading partial DIEs if we need to load |
636 | absolutely all DIEs for this compilation unit, instead of just the ones | |
637 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
638 | hash table and don't find it. */ |
639 | unsigned int load_all_dies : 1; | |
640 | ||
0186c6a7 DE |
641 | /* Non-zero if this CU is from .debug_types. |
642 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
643 | this is non-zero. */ | |
3019eac3 DE |
644 | unsigned int is_debug_types : 1; |
645 | ||
36586728 TT |
646 | /* Non-zero if this CU is from the .dwz file. */ |
647 | unsigned int is_dwz : 1; | |
648 | ||
a2ce51a0 DE |
649 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
650 | This flag is only valid if is_debug_types is true. | |
651 | We can't read a CU directly from a DWO file: There are required | |
652 | attributes in the stub. */ | |
653 | unsigned int reading_dwo_directly : 1; | |
654 | ||
7ee85ab1 DE |
655 | /* Non-zero if the TU has been read. |
656 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
657 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
658 | fetching them from random other DWOs (due to comdat folding). | |
659 | If the TU has already been read, the optimization is unnecessary | |
660 | (and unwise - we don't want to change where gdb thinks the TU lives | |
661 | "midflight"). | |
662 | This flag is only valid if is_debug_types is true. */ | |
663 | unsigned int tu_read : 1; | |
664 | ||
3019eac3 DE |
665 | /* The section this CU/TU lives in. |
666 | If the DIE refers to a DWO file, this is always the original die, | |
667 | not the DWO file. */ | |
8a0459fd | 668 | struct dwarf2_section_info *section; |
348e048f | 669 | |
17ea53c3 | 670 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
671 | of the CU cache it gets reset to NULL again. This is left as NULL for |
672 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 673 | struct dwarf2_cu *cu; |
1c379e20 | 674 | |
9cdd5dbd DE |
675 | /* The corresponding objfile. |
676 | Normally we can get the objfile from dwarf2_per_objfile. | |
677 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
678 | struct objfile *objfile; |
679 | ||
fffbe6a8 YQ |
680 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
681 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
682 | union |
683 | { | |
684 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 685 | or NULL for unread partial units. */ |
9291a0cd TT |
686 | struct partial_symtab *psymtab; |
687 | ||
688 | /* Data needed by the "quick" functions. */ | |
689 | struct dwarf2_per_cu_quick_data *quick; | |
690 | } v; | |
95554aad | 691 | |
796a7ff8 DE |
692 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
693 | while reading psymtabs, used to compute the psymtab dependencies, | |
694 | and then cleared. Then it is filled in again while reading full | |
695 | symbols, and only deleted when the objfile is destroyed. | |
696 | ||
697 | This is also used to work around a difference between the way gold | |
698 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
699 | is a gold bug. For symbols coming from TUs, gold records in the index | |
700 | the CU that includes the TU instead of the TU itself. This breaks | |
701 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
702 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
703 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
704 | we need to look in TU Z to find X. Fortunately, this is akin to | |
705 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
706 | .gdb_index version <=7 this also records the TUs that the CU referred | |
707 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
708 | indices so we only pay a price for gold generated indices. |
709 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 710 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
711 | }; |
712 | ||
348e048f DE |
713 | /* Entry in the signatured_types hash table. */ |
714 | ||
715 | struct signatured_type | |
716 | { | |
42e7ad6c | 717 | /* The "per_cu" object of this type. |
ac9ec31b | 718 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
719 | N.B.: This is the first member so that it's easy to convert pointers |
720 | between them. */ | |
721 | struct dwarf2_per_cu_data per_cu; | |
722 | ||
3019eac3 | 723 | /* The type's signature. */ |
348e048f DE |
724 | ULONGEST signature; |
725 | ||
3019eac3 | 726 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
727 | If this TU is a DWO stub and the definition lives in a DWO file |
728 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
729 | cu_offset type_offset_in_tu; |
730 | ||
731 | /* Offset in the section of the type's DIE. | |
732 | If the definition lives in a DWO file, this is the offset in the | |
733 | .debug_types.dwo section. | |
734 | The value is zero until the actual value is known. | |
735 | Zero is otherwise not a valid section offset. */ | |
736 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
737 | |
738 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
739 | can share them. This points to the containing symtab. */ | |
740 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
741 | |
742 | /* The type. | |
743 | The first time we encounter this type we fully read it in and install it | |
744 | in the symbol tables. Subsequent times we only need the type. */ | |
745 | struct type *type; | |
a2ce51a0 DE |
746 | |
747 | /* Containing DWO unit. | |
748 | This field is valid iff per_cu.reading_dwo_directly. */ | |
749 | struct dwo_unit *dwo_unit; | |
348e048f DE |
750 | }; |
751 | ||
0186c6a7 DE |
752 | typedef struct signatured_type *sig_type_ptr; |
753 | DEF_VEC_P (sig_type_ptr); | |
754 | ||
094b34ac DE |
755 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
756 | This includes type_unit_group and quick_file_names. */ | |
757 | ||
758 | struct stmt_list_hash | |
759 | { | |
760 | /* The DWO unit this table is from or NULL if there is none. */ | |
761 | struct dwo_unit *dwo_unit; | |
762 | ||
763 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 764 | sect_offset line_sect_off; |
094b34ac DE |
765 | }; |
766 | ||
f4dc4d17 DE |
767 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
768 | an object of this type. */ | |
769 | ||
770 | struct type_unit_group | |
771 | { | |
0186c6a7 | 772 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
773 | To simplify things we create an artificial CU that "includes" all the |
774 | type units using this stmt_list so that the rest of the code still has | |
775 | a "per_cu" handle on the symtab. | |
776 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 777 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
778 | struct dwarf2_per_cu_data per_cu; |
779 | ||
0186c6a7 DE |
780 | /* The TUs that share this DW_AT_stmt_list entry. |
781 | This is added to while parsing type units to build partial symtabs, | |
782 | and is deleted afterwards and not used again. */ | |
783 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 784 | |
43f3e411 | 785 | /* The compunit symtab. |
094b34ac | 786 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
787 | so we create an essentially anonymous symtab as the compunit symtab. */ |
788 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 789 | |
094b34ac DE |
790 | /* The data used to construct the hash key. */ |
791 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
792 | |
793 | /* The number of symtabs from the line header. | |
794 | The value here must match line_header.num_file_names. */ | |
795 | unsigned int num_symtabs; | |
796 | ||
797 | /* The symbol tables for this TU (obtained from the files listed in | |
798 | DW_AT_stmt_list). | |
799 | WARNING: The order of entries here must match the order of entries | |
800 | in the line header. After the first TU using this type_unit_group, the | |
801 | line header for the subsequent TUs is recreated from this. This is done | |
802 | because we need to use the same symtabs for each TU using the same | |
803 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
804 | there's no guarantee the line header doesn't have duplicate entries. */ | |
805 | struct symtab **symtabs; | |
806 | }; | |
807 | ||
73869dc2 | 808 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
809 | |
810 | struct dwo_sections | |
811 | { | |
812 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
813 | struct dwarf2_section_info line; |
814 | struct dwarf2_section_info loc; | |
43988095 | 815 | struct dwarf2_section_info loclists; |
09262596 DE |
816 | struct dwarf2_section_info macinfo; |
817 | struct dwarf2_section_info macro; | |
3019eac3 DE |
818 | struct dwarf2_section_info str; |
819 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
820 | /* In the case of a virtual DWO file, these two are unused. */ |
821 | struct dwarf2_section_info info; | |
3019eac3 DE |
822 | VEC (dwarf2_section_info_def) *types; |
823 | }; | |
824 | ||
c88ee1f0 | 825 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
826 | |
827 | struct dwo_unit | |
828 | { | |
829 | /* Backlink to the containing struct dwo_file. */ | |
830 | struct dwo_file *dwo_file; | |
831 | ||
832 | /* The "id" that distinguishes this CU/TU. | |
833 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
834 | Since signatures came first, we stick with it for consistency. */ | |
835 | ULONGEST signature; | |
836 | ||
837 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 838 | struct dwarf2_section_info *section; |
3019eac3 | 839 | |
9c541725 PA |
840 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
841 | sect_offset sect_off; | |
3019eac3 DE |
842 | unsigned int length; |
843 | ||
844 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
845 | cu_offset type_offset_in_tu; | |
846 | }; | |
847 | ||
73869dc2 DE |
848 | /* include/dwarf2.h defines the DWP section codes. |
849 | It defines a max value but it doesn't define a min value, which we | |
850 | use for error checking, so provide one. */ | |
851 | ||
852 | enum dwp_v2_section_ids | |
853 | { | |
854 | DW_SECT_MIN = 1 | |
855 | }; | |
856 | ||
80626a55 | 857 | /* Data for one DWO file. |
57d63ce2 DE |
858 | |
859 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
860 | appears in a DWP file). DWP files don't really have DWO files per se - | |
861 | comdat folding of types "loses" the DWO file they came from, and from | |
862 | a high level view DWP files appear to contain a mass of random types. | |
863 | However, to maintain consistency with the non-DWP case we pretend DWP | |
864 | files contain virtual DWO files, and we assign each TU with one virtual | |
865 | DWO file (generally based on the line and abbrev section offsets - | |
866 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
867 | |
868 | struct dwo_file | |
869 | { | |
0ac5b59e | 870 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
871 | For virtual DWO files the name is constructed from the section offsets |
872 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
873 | from related CU+TUs. */ | |
0ac5b59e DE |
874 | const char *dwo_name; |
875 | ||
876 | /* The DW_AT_comp_dir attribute. */ | |
877 | const char *comp_dir; | |
3019eac3 | 878 | |
80626a55 DE |
879 | /* The bfd, when the file is open. Otherwise this is NULL. |
880 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
881 | bfd *dbfd; | |
3019eac3 | 882 | |
73869dc2 DE |
883 | /* The sections that make up this DWO file. |
884 | Remember that for virtual DWO files in DWP V2, these are virtual | |
885 | sections (for lack of a better name). */ | |
3019eac3 DE |
886 | struct dwo_sections sections; |
887 | ||
33c5cd75 DB |
888 | /* The CUs in the file. |
889 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
890 | an extension to handle LLVM's Link Time Optimization output (where | |
891 | multiple source files may be compiled into a single object/dwo pair). */ | |
892 | htab_t cus; | |
3019eac3 DE |
893 | |
894 | /* Table of TUs in the file. | |
895 | Each element is a struct dwo_unit. */ | |
896 | htab_t tus; | |
897 | }; | |
898 | ||
80626a55 DE |
899 | /* These sections are what may appear in a DWP file. */ |
900 | ||
901 | struct dwp_sections | |
902 | { | |
73869dc2 | 903 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
904 | struct dwarf2_section_info str; |
905 | struct dwarf2_section_info cu_index; | |
906 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
907 | |
908 | /* These are only used by DWP version 2 files. | |
909 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
910 | sections are referenced by section number, and are not recorded here. | |
911 | In DWP version 2 there is at most one copy of all these sections, each | |
912 | section being (effectively) comprised of the concatenation of all of the | |
913 | individual sections that exist in the version 1 format. | |
914 | To keep the code simple we treat each of these concatenated pieces as a | |
915 | section itself (a virtual section?). */ | |
916 | struct dwarf2_section_info abbrev; | |
917 | struct dwarf2_section_info info; | |
918 | struct dwarf2_section_info line; | |
919 | struct dwarf2_section_info loc; | |
920 | struct dwarf2_section_info macinfo; | |
921 | struct dwarf2_section_info macro; | |
922 | struct dwarf2_section_info str_offsets; | |
923 | struct dwarf2_section_info types; | |
80626a55 DE |
924 | }; |
925 | ||
73869dc2 DE |
926 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
927 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 928 | |
73869dc2 | 929 | struct virtual_v1_dwo_sections |
80626a55 DE |
930 | { |
931 | struct dwarf2_section_info abbrev; | |
932 | struct dwarf2_section_info line; | |
933 | struct dwarf2_section_info loc; | |
934 | struct dwarf2_section_info macinfo; | |
935 | struct dwarf2_section_info macro; | |
936 | struct dwarf2_section_info str_offsets; | |
937 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 938 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
939 | struct dwarf2_section_info info_or_types; |
940 | }; | |
941 | ||
73869dc2 DE |
942 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
943 | In version 2, the sections of the DWO files are concatenated together | |
944 | and stored in one section of that name. Thus each ELF section contains | |
945 | several "virtual" sections. */ | |
946 | ||
947 | struct virtual_v2_dwo_sections | |
948 | { | |
949 | bfd_size_type abbrev_offset; | |
950 | bfd_size_type abbrev_size; | |
951 | ||
952 | bfd_size_type line_offset; | |
953 | bfd_size_type line_size; | |
954 | ||
955 | bfd_size_type loc_offset; | |
956 | bfd_size_type loc_size; | |
957 | ||
958 | bfd_size_type macinfo_offset; | |
959 | bfd_size_type macinfo_size; | |
960 | ||
961 | bfd_size_type macro_offset; | |
962 | bfd_size_type macro_size; | |
963 | ||
964 | bfd_size_type str_offsets_offset; | |
965 | bfd_size_type str_offsets_size; | |
966 | ||
967 | /* Each DWP hash table entry records one CU or one TU. | |
968 | That is recorded here, and copied to dwo_unit.section. */ | |
969 | bfd_size_type info_or_types_offset; | |
970 | bfd_size_type info_or_types_size; | |
971 | }; | |
972 | ||
80626a55 DE |
973 | /* Contents of DWP hash tables. */ |
974 | ||
975 | struct dwp_hash_table | |
976 | { | |
73869dc2 | 977 | uint32_t version, nr_columns; |
80626a55 | 978 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
979 | const gdb_byte *hash_table, *unit_table; |
980 | union | |
981 | { | |
982 | struct | |
983 | { | |
984 | const gdb_byte *indices; | |
985 | } v1; | |
986 | struct | |
987 | { | |
988 | /* This is indexed by column number and gives the id of the section | |
989 | in that column. */ | |
990 | #define MAX_NR_V2_DWO_SECTIONS \ | |
991 | (1 /* .debug_info or .debug_types */ \ | |
992 | + 1 /* .debug_abbrev */ \ | |
993 | + 1 /* .debug_line */ \ | |
994 | + 1 /* .debug_loc */ \ | |
995 | + 1 /* .debug_str_offsets */ \ | |
996 | + 1 /* .debug_macro or .debug_macinfo */) | |
997 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
998 | const gdb_byte *offsets; | |
999 | const gdb_byte *sizes; | |
1000 | } v2; | |
1001 | } section_pool; | |
80626a55 DE |
1002 | }; |
1003 | ||
1004 | /* Data for one DWP file. */ | |
1005 | ||
1006 | struct dwp_file | |
1007 | { | |
1008 | /* Name of the file. */ | |
1009 | const char *name; | |
1010 | ||
73869dc2 DE |
1011 | /* File format version. */ |
1012 | int version; | |
1013 | ||
93417882 | 1014 | /* The bfd. */ |
80626a55 DE |
1015 | bfd *dbfd; |
1016 | ||
1017 | /* Section info for this file. */ | |
1018 | struct dwp_sections sections; | |
1019 | ||
57d63ce2 | 1020 | /* Table of CUs in the file. */ |
80626a55 DE |
1021 | const struct dwp_hash_table *cus; |
1022 | ||
1023 | /* Table of TUs in the file. */ | |
1024 | const struct dwp_hash_table *tus; | |
1025 | ||
19ac8c2e DE |
1026 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1027 | htab_t loaded_cus; | |
1028 | htab_t loaded_tus; | |
80626a55 | 1029 | |
73869dc2 DE |
1030 | /* Table to map ELF section numbers to their sections. |
1031 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1032 | unsigned int num_sections; |
1033 | asection **elf_sections; | |
1034 | }; | |
1035 | ||
36586728 TT |
1036 | /* This represents a '.dwz' file. */ |
1037 | ||
1038 | struct dwz_file | |
1039 | { | |
1040 | /* A dwz file can only contain a few sections. */ | |
1041 | struct dwarf2_section_info abbrev; | |
1042 | struct dwarf2_section_info info; | |
1043 | struct dwarf2_section_info str; | |
1044 | struct dwarf2_section_info line; | |
1045 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1046 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1047 | |
1048 | /* The dwz's BFD. */ | |
1049 | bfd *dwz_bfd; | |
1050 | }; | |
1051 | ||
0963b4bd MS |
1052 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1053 | al. which are used for both .debug_info and .debug_types dies. | |
1054 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1055 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1056 | |
1057 | struct die_reader_specs | |
1058 | { | |
a32a8923 | 1059 | /* The bfd of die_section. */ |
93311388 DE |
1060 | bfd* abfd; |
1061 | ||
1062 | /* The CU of the DIE we are parsing. */ | |
1063 | struct dwarf2_cu *cu; | |
1064 | ||
80626a55 | 1065 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1066 | struct dwo_file *dwo_file; |
1067 | ||
dee91e82 | 1068 | /* The section the die comes from. |
3019eac3 | 1069 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1070 | struct dwarf2_section_info *die_section; |
1071 | ||
1072 | /* die_section->buffer. */ | |
d521ce57 | 1073 | const gdb_byte *buffer; |
f664829e DE |
1074 | |
1075 | /* The end of the buffer. */ | |
1076 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1077 | |
1078 | /* The value of the DW_AT_comp_dir attribute. */ | |
1079 | const char *comp_dir; | |
93311388 DE |
1080 | }; |
1081 | ||
fd820528 | 1082 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1083 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1084 | const gdb_byte *info_ptr, |
dee91e82 DE |
1085 | struct die_info *comp_unit_die, |
1086 | int has_children, | |
1087 | void *data); | |
1088 | ||
ecfb656c PA |
1089 | /* A 1-based directory index. This is a strong typedef to prevent |
1090 | accidentally using a directory index as a 0-based index into an | |
1091 | array/vector. */ | |
1092 | enum class dir_index : unsigned int {}; | |
1093 | ||
1094 | /* Likewise, a 1-based file name index. */ | |
1095 | enum class file_name_index : unsigned int {}; | |
1096 | ||
52059ffd TT |
1097 | struct file_entry |
1098 | { | |
fff8551c PA |
1099 | file_entry () = default; |
1100 | ||
ecfb656c | 1101 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1102 | unsigned int mod_time_, unsigned int length_) |
1103 | : name (name_), | |
ecfb656c | 1104 | d_index (d_index_), |
fff8551c PA |
1105 | mod_time (mod_time_), |
1106 | length (length_) | |
1107 | {} | |
1108 | ||
ecfb656c PA |
1109 | /* Return the include directory at D_INDEX stored in LH. Returns |
1110 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1111 | const char *include_dir (const line_header *lh) const; |
1112 | ||
fff8551c PA |
1113 | /* The file name. Note this is an observing pointer. The memory is |
1114 | owned by debug_line_buffer. */ | |
1115 | const char *name {}; | |
1116 | ||
8c43009f | 1117 | /* The directory index (1-based). */ |
ecfb656c | 1118 | dir_index d_index {}; |
fff8551c PA |
1119 | |
1120 | unsigned int mod_time {}; | |
1121 | ||
1122 | unsigned int length {}; | |
1123 | ||
1124 | /* True if referenced by the Line Number Program. */ | |
1125 | bool included_p {}; | |
1126 | ||
83769d0b | 1127 | /* The associated symbol table, if any. */ |
fff8551c | 1128 | struct symtab *symtab {}; |
52059ffd TT |
1129 | }; |
1130 | ||
debd256d JB |
1131 | /* The line number information for a compilation unit (found in the |
1132 | .debug_line section) begins with a "statement program header", | |
1133 | which contains the following information. */ | |
1134 | struct line_header | |
1135 | { | |
fff8551c PA |
1136 | line_header () |
1137 | : offset_in_dwz {} | |
1138 | {} | |
1139 | ||
1140 | /* Add an entry to the include directory table. */ | |
1141 | void add_include_dir (const char *include_dir); | |
1142 | ||
1143 | /* Add an entry to the file name table. */ | |
ecfb656c | 1144 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1145 | unsigned int mod_time, unsigned int length); |
1146 | ||
ecfb656c | 1147 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1148 | is out of bounds. */ |
ecfb656c | 1149 | const char *include_dir_at (dir_index index) const |
8c43009f | 1150 | { |
ecfb656c PA |
1151 | /* Convert directory index number (1-based) to vector index |
1152 | (0-based). */ | |
1153 | size_t vec_index = to_underlying (index) - 1; | |
1154 | ||
1155 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1156 | return NULL; |
ecfb656c | 1157 | return include_dirs[vec_index]; |
8c43009f PA |
1158 | } |
1159 | ||
ecfb656c | 1160 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1161 | is out of bounds. */ |
ecfb656c | 1162 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1163 | { |
ecfb656c PA |
1164 | /* Convert file name index number (1-based) to vector index |
1165 | (0-based). */ | |
1166 | size_t vec_index = to_underlying (index) - 1; | |
1167 | ||
1168 | if (vec_index >= file_names.size ()) | |
fff8551c | 1169 | return NULL; |
ecfb656c | 1170 | return &file_names[vec_index]; |
fff8551c PA |
1171 | } |
1172 | ||
1173 | /* Const version of the above. */ | |
1174 | const file_entry *file_name_at (unsigned int index) const | |
1175 | { | |
1176 | if (index >= file_names.size ()) | |
8c43009f PA |
1177 | return NULL; |
1178 | return &file_names[index]; | |
1179 | } | |
1180 | ||
527f3840 | 1181 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1182 | sect_offset sect_off {}; |
527f3840 JK |
1183 | |
1184 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1185 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1186 | ||
1187 | unsigned int total_length {}; | |
1188 | unsigned short version {}; | |
1189 | unsigned int header_length {}; | |
1190 | unsigned char minimum_instruction_length {}; | |
1191 | unsigned char maximum_ops_per_instruction {}; | |
1192 | unsigned char default_is_stmt {}; | |
1193 | int line_base {}; | |
1194 | unsigned char line_range {}; | |
1195 | unsigned char opcode_base {}; | |
debd256d JB |
1196 | |
1197 | /* standard_opcode_lengths[i] is the number of operands for the | |
1198 | standard opcode whose value is i. This means that | |
1199 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1200 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1201 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1202 | |
fff8551c PA |
1203 | /* The include_directories table. Note these are observing |
1204 | pointers. The memory is owned by debug_line_buffer. */ | |
1205 | std::vector<const char *> include_dirs; | |
debd256d | 1206 | |
fff8551c PA |
1207 | /* The file_names table. */ |
1208 | std::vector<file_entry> file_names; | |
debd256d JB |
1209 | |
1210 | /* The start and end of the statement program following this | |
6502dd73 | 1211 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1212 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1213 | }; |
c906108c | 1214 | |
fff8551c PA |
1215 | typedef std::unique_ptr<line_header> line_header_up; |
1216 | ||
8c43009f PA |
1217 | const char * |
1218 | file_entry::include_dir (const line_header *lh) const | |
1219 | { | |
ecfb656c | 1220 | return lh->include_dir_at (d_index); |
8c43009f PA |
1221 | } |
1222 | ||
c906108c | 1223 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1224 | need this much information. */ |
c906108c SS |
1225 | struct partial_die_info |
1226 | { | |
72bf9492 | 1227 | /* Offset of this DIE. */ |
9c541725 | 1228 | sect_offset sect_off; |
72bf9492 DJ |
1229 | |
1230 | /* DWARF-2 tag for this DIE. */ | |
1231 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1232 | ||
72bf9492 DJ |
1233 | /* Assorted flags describing the data found in this DIE. */ |
1234 | unsigned int has_children : 1; | |
1235 | unsigned int is_external : 1; | |
1236 | unsigned int is_declaration : 1; | |
1237 | unsigned int has_type : 1; | |
1238 | unsigned int has_specification : 1; | |
1239 | unsigned int has_pc_info : 1; | |
481860b3 | 1240 | unsigned int may_be_inlined : 1; |
72bf9492 | 1241 | |
0c1b455e TT |
1242 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1243 | unsigned int main_subprogram : 1; | |
1244 | ||
72bf9492 DJ |
1245 | /* Flag set if the SCOPE field of this structure has been |
1246 | computed. */ | |
1247 | unsigned int scope_set : 1; | |
1248 | ||
fa4028e9 JB |
1249 | /* Flag set if the DIE has a byte_size attribute. */ |
1250 | unsigned int has_byte_size : 1; | |
1251 | ||
ff908ebf AW |
1252 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1253 | unsigned int has_const_value : 1; | |
1254 | ||
98bfdba5 PA |
1255 | /* Flag set if any of the DIE's children are template arguments. */ |
1256 | unsigned int has_template_arguments : 1; | |
1257 | ||
abc72ce4 DE |
1258 | /* Flag set if fixup_partial_die has been called on this die. */ |
1259 | unsigned int fixup_called : 1; | |
1260 | ||
36586728 TT |
1261 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1262 | unsigned int is_dwz : 1; | |
1263 | ||
1264 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1265 | unsigned int spec_is_dwz : 1; | |
1266 | ||
72bf9492 | 1267 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1268 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1269 | const char *name; |
72bf9492 | 1270 | |
abc72ce4 DE |
1271 | /* The linkage name, if present. */ |
1272 | const char *linkage_name; | |
1273 | ||
72bf9492 DJ |
1274 | /* The scope to prepend to our children. This is generally |
1275 | allocated on the comp_unit_obstack, so will disappear | |
1276 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1277 | const char *scope; |
72bf9492 | 1278 | |
95554aad TT |
1279 | /* Some data associated with the partial DIE. The tag determines |
1280 | which field is live. */ | |
1281 | union | |
1282 | { | |
1283 | /* The location description associated with this DIE, if any. */ | |
1284 | struct dwarf_block *locdesc; | |
1285 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1286 | sect_offset sect_off; |
95554aad | 1287 | } d; |
72bf9492 DJ |
1288 | |
1289 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1290 | CORE_ADDR lowpc; |
1291 | CORE_ADDR highpc; | |
72bf9492 | 1292 | |
93311388 | 1293 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1294 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1295 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1296 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1297 | const gdb_byte *sibling; |
72bf9492 DJ |
1298 | |
1299 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1300 | DW_AT_specification (or DW_AT_abstract_origin or | |
1301 | DW_AT_extension). */ | |
b64f50a1 | 1302 | sect_offset spec_offset; |
72bf9492 DJ |
1303 | |
1304 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1305 | if any. */ | |
1306 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1307 | }; |
1308 | ||
0963b4bd | 1309 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1310 | struct abbrev_info |
1311 | { | |
1312 | unsigned int number; /* number identifying abbrev */ | |
1313 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1314 | unsigned short has_children; /* boolean */ |
1315 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1316 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1317 | struct abbrev_info *next; /* next in chain */ | |
1318 | }; | |
1319 | ||
1320 | struct attr_abbrev | |
1321 | { | |
9d25dd43 DE |
1322 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1323 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1324 | |
1325 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1326 | LONGEST implicit_const; | |
c906108c SS |
1327 | }; |
1328 | ||
433df2d4 DE |
1329 | /* Size of abbrev_table.abbrev_hash_table. */ |
1330 | #define ABBREV_HASH_SIZE 121 | |
1331 | ||
1332 | /* Top level data structure to contain an abbreviation table. */ | |
1333 | ||
1334 | struct abbrev_table | |
1335 | { | |
f4dc4d17 DE |
1336 | /* Where the abbrev table came from. |
1337 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1338 | sect_offset sect_off; |
433df2d4 DE |
1339 | |
1340 | /* Storage for the abbrev table. */ | |
1341 | struct obstack abbrev_obstack; | |
1342 | ||
1343 | /* Hash table of abbrevs. | |
1344 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1345 | It could be statically allocated, but the previous code didn't so we | |
1346 | don't either. */ | |
1347 | struct abbrev_info **abbrevs; | |
1348 | }; | |
1349 | ||
0963b4bd | 1350 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1351 | struct attribute |
1352 | { | |
9d25dd43 | 1353 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1354 | ENUM_BITFIELD(dwarf_form) form : 15; |
1355 | ||
1356 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1357 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1358 | here for better struct attribute alignment. */ | |
1359 | unsigned int string_is_canonical : 1; | |
1360 | ||
b60c80d6 DJ |
1361 | union |
1362 | { | |
15d034d0 | 1363 | const char *str; |
b60c80d6 | 1364 | struct dwarf_block *blk; |
43bbcdc2 PH |
1365 | ULONGEST unsnd; |
1366 | LONGEST snd; | |
b60c80d6 | 1367 | CORE_ADDR addr; |
ac9ec31b | 1368 | ULONGEST signature; |
b60c80d6 DJ |
1369 | } |
1370 | u; | |
1371 | }; | |
1372 | ||
0963b4bd | 1373 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1374 | struct die_info |
1375 | { | |
76815b17 DE |
1376 | /* DWARF-2 tag for this DIE. */ |
1377 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1378 | ||
1379 | /* Number of attributes */ | |
98bfdba5 PA |
1380 | unsigned char num_attrs; |
1381 | ||
1382 | /* True if we're presently building the full type name for the | |
1383 | type derived from this DIE. */ | |
1384 | unsigned char building_fullname : 1; | |
76815b17 | 1385 | |
adde2bff DE |
1386 | /* True if this die is in process. PR 16581. */ |
1387 | unsigned char in_process : 1; | |
1388 | ||
76815b17 DE |
1389 | /* Abbrev number */ |
1390 | unsigned int abbrev; | |
1391 | ||
93311388 | 1392 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1393 | sect_offset sect_off; |
78ba4af6 JB |
1394 | |
1395 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1396 | points to this die's parent; CHILD points to the first child of | |
1397 | this node; and all the children of a given node are chained | |
4950bc1c | 1398 | together via their SIBLING fields. */ |
639d11d3 DC |
1399 | struct die_info *child; /* Its first child, if any. */ |
1400 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1401 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1402 | |
b60c80d6 DJ |
1403 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1404 | zero, but it's not common and zero-sized arrays are not | |
1405 | sufficiently portable C. */ | |
1406 | struct attribute attrs[1]; | |
c906108c SS |
1407 | }; |
1408 | ||
0963b4bd | 1409 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1410 | |
1411 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1412 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1413 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1414 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1415 | #define DW_SND(attr) ((attr)->u.snd) | |
1416 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1417 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1418 | |
0963b4bd | 1419 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1420 | struct dwarf_block |
1421 | { | |
56eb65bd | 1422 | size_t size; |
1d6edc3c JK |
1423 | |
1424 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1425 | const gdb_byte *data; |
c906108c SS |
1426 | }; |
1427 | ||
c906108c SS |
1428 | #ifndef ATTR_ALLOC_CHUNK |
1429 | #define ATTR_ALLOC_CHUNK 4 | |
1430 | #endif | |
1431 | ||
c906108c SS |
1432 | /* Allocate fields for structs, unions and enums in this size. */ |
1433 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1434 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1435 | #endif | |
1436 | ||
c906108c SS |
1437 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1438 | but this would require a corresponding change in unpack_field_as_long | |
1439 | and friends. */ | |
1440 | static int bits_per_byte = 8; | |
1441 | ||
52059ffd TT |
1442 | struct nextfield |
1443 | { | |
1444 | struct nextfield *next; | |
1445 | int accessibility; | |
1446 | int virtuality; | |
1447 | struct field field; | |
1448 | }; | |
1449 | ||
1450 | struct nextfnfield | |
1451 | { | |
1452 | struct nextfnfield *next; | |
1453 | struct fn_field fnfield; | |
1454 | }; | |
1455 | ||
1456 | struct fnfieldlist | |
1457 | { | |
1458 | const char *name; | |
1459 | int length; | |
1460 | struct nextfnfield *head; | |
1461 | }; | |
1462 | ||
1463 | struct typedef_field_list | |
1464 | { | |
1465 | struct typedef_field field; | |
1466 | struct typedef_field_list *next; | |
1467 | }; | |
1468 | ||
c906108c SS |
1469 | /* The routines that read and process dies for a C struct or C++ class |
1470 | pass lists of data member fields and lists of member function fields | |
1471 | in an instance of a field_info structure, as defined below. */ | |
1472 | struct field_info | |
c5aa993b | 1473 | { |
0963b4bd | 1474 | /* List of data member and baseclasses fields. */ |
52059ffd | 1475 | struct nextfield *fields, *baseclasses; |
c906108c | 1476 | |
7d0ccb61 | 1477 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1478 | int nfields; |
c906108c | 1479 | |
c5aa993b JM |
1480 | /* Number of baseclasses. */ |
1481 | int nbaseclasses; | |
c906108c | 1482 | |
c5aa993b JM |
1483 | /* Set if the accesibility of one of the fields is not public. */ |
1484 | int non_public_fields; | |
c906108c | 1485 | |
c5aa993b JM |
1486 | /* Member function fieldlist array, contains name of possibly overloaded |
1487 | member function, number of overloaded member functions and a pointer | |
1488 | to the head of the member function field chain. */ | |
52059ffd | 1489 | struct fnfieldlist *fnfieldlists; |
c906108c | 1490 | |
c5aa993b JM |
1491 | /* Number of entries in the fnfieldlists array. */ |
1492 | int nfnfields; | |
98751a41 JK |
1493 | |
1494 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1495 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1496 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1497 | unsigned typedef_field_list_count; |
c5aa993b | 1498 | }; |
c906108c | 1499 | |
10b3939b DJ |
1500 | /* One item on the queue of compilation units to read in full symbols |
1501 | for. */ | |
1502 | struct dwarf2_queue_item | |
1503 | { | |
1504 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1505 | enum language pretend_language; |
10b3939b DJ |
1506 | struct dwarf2_queue_item *next; |
1507 | }; | |
1508 | ||
1509 | /* The current queue. */ | |
1510 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1511 | ||
ae038cb0 DJ |
1512 | /* Loaded secondary compilation units are kept in memory until they |
1513 | have not been referenced for the processing of this many | |
1514 | compilation units. Set this to zero to disable caching. Cache | |
1515 | sizes of up to at least twenty will improve startup time for | |
1516 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1517 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1518 | static void |
b4f54984 DE |
1519 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1520 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1521 | { |
3e43a32a | 1522 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1523 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1524 | value); |
1525 | } | |
4390d890 | 1526 | \f |
c906108c SS |
1527 | /* local function prototypes */ |
1528 | ||
a32a8923 DE |
1529 | static const char *get_section_name (const struct dwarf2_section_info *); |
1530 | ||
1531 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1532 | ||
918dd910 JK |
1533 | static void dwarf2_find_base_address (struct die_info *die, |
1534 | struct dwarf2_cu *cu); | |
1535 | ||
0018ea6f DE |
1536 | static struct partial_symtab *create_partial_symtab |
1537 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1538 | ||
f1902523 JK |
1539 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1540 | const gdb_byte *info_ptr, | |
1541 | struct die_info *type_unit_die, | |
1542 | int has_children, void *data); | |
1543 | ||
c67a9c90 | 1544 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1545 | |
72bf9492 DJ |
1546 | static void scan_partial_symbols (struct partial_die_info *, |
1547 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1548 | int, struct dwarf2_cu *); |
c906108c | 1549 | |
72bf9492 DJ |
1550 | static void add_partial_symbol (struct partial_die_info *, |
1551 | struct dwarf2_cu *); | |
63d06c5c | 1552 | |
72bf9492 DJ |
1553 | static void add_partial_namespace (struct partial_die_info *pdi, |
1554 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1555 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1556 | |
5d7cb8df | 1557 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1558 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1559 | struct dwarf2_cu *cu); |
1560 | ||
72bf9492 DJ |
1561 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1562 | struct dwarf2_cu *cu); | |
91c24f0a | 1563 | |
bc30ff58 JB |
1564 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1565 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1566 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1567 | |
257e7a09 YQ |
1568 | static void dwarf2_read_symtab (struct partial_symtab *, |
1569 | struct objfile *); | |
c906108c | 1570 | |
a14ed312 | 1571 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1572 | |
433df2d4 DE |
1573 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1574 | (const struct abbrev_table *, unsigned int); | |
1575 | ||
1576 | static struct abbrev_table *abbrev_table_read_table | |
1577 | (struct dwarf2_section_info *, sect_offset); | |
1578 | ||
1579 | static void abbrev_table_free (struct abbrev_table *); | |
1580 | ||
f4dc4d17 DE |
1581 | static void abbrev_table_free_cleanup (void *); |
1582 | ||
dee91e82 DE |
1583 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1584 | struct dwarf2_section_info *); | |
c906108c | 1585 | |
f3dd6933 | 1586 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1587 | |
d521ce57 | 1588 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1589 | |
dee91e82 | 1590 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1591 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1592 | |
d521ce57 TT |
1593 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1594 | struct partial_die_info *, | |
1595 | struct abbrev_info *, | |
1596 | unsigned int, | |
1597 | const gdb_byte *); | |
c906108c | 1598 | |
36586728 | 1599 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1600 | struct dwarf2_cu *); |
72bf9492 DJ |
1601 | |
1602 | static void fixup_partial_die (struct partial_die_info *, | |
1603 | struct dwarf2_cu *); | |
1604 | ||
d521ce57 TT |
1605 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1606 | struct attribute *, struct attr_abbrev *, | |
1607 | const gdb_byte *); | |
a8329558 | 1608 | |
a1855c1d | 1609 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1610 | |
a1855c1d | 1611 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1612 | |
a1855c1d | 1613 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1614 | |
a1855c1d | 1615 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1616 | |
a1855c1d | 1617 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1618 | |
d521ce57 | 1619 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1620 | unsigned int *); |
c906108c | 1621 | |
d521ce57 | 1622 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1623 | |
1624 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1625 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1626 | unsigned int *, unsigned int *); |
613e1657 | 1627 | |
d521ce57 TT |
1628 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1629 | const struct comp_unit_head *, | |
c764a876 DE |
1630 | unsigned int *); |
1631 | ||
d521ce57 | 1632 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1633 | |
f4dc4d17 DE |
1634 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1635 | sect_offset); | |
1636 | ||
d521ce57 | 1637 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1638 | |
d521ce57 | 1639 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1640 | |
d521ce57 TT |
1641 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1642 | const struct comp_unit_head *, | |
1643 | unsigned int *); | |
4bdf3d34 | 1644 | |
43988095 JK |
1645 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1646 | const struct comp_unit_head *, | |
1647 | unsigned int *); | |
36586728 | 1648 | |
43988095 | 1649 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1650 | |
d521ce57 | 1651 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1652 | |
d521ce57 TT |
1653 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1654 | const gdb_byte *, | |
3019eac3 DE |
1655 | unsigned int *); |
1656 | ||
d521ce57 | 1657 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1658 | ULONGEST str_index); |
3019eac3 | 1659 | |
e142c38c | 1660 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1661 | |
e142c38c DJ |
1662 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1663 | struct dwarf2_cu *); | |
c906108c | 1664 | |
348e048f | 1665 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1666 | unsigned int); |
348e048f | 1667 | |
7d45c7c3 KB |
1668 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1669 | struct dwarf2_cu *cu); | |
1670 | ||
05cf31d1 JB |
1671 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1672 | struct dwarf2_cu *cu); | |
1673 | ||
e142c38c | 1674 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1675 | |
e142c38c | 1676 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1677 | struct dwarf2_cu **); |
63d06c5c | 1678 | |
9c541725 | 1679 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1680 | struct dwarf2_cu *cu); |
debd256d | 1681 | |
f3f5162e | 1682 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1683 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1684 | CORE_ADDR, int decode_mapping); |
c906108c | 1685 | |
4d663531 | 1686 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1687 | |
43f3e411 DE |
1688 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1689 | const char *, const char *, | |
1690 | CORE_ADDR); | |
f4dc4d17 | 1691 | |
a14ed312 | 1692 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1693 | struct dwarf2_cu *); |
c906108c | 1694 | |
34eaf542 TT |
1695 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1696 | struct dwarf2_cu *, struct symbol *); | |
1697 | ||
ff39bb5e | 1698 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1699 | struct dwarf2_cu *); |
c906108c | 1700 | |
ff39bb5e | 1701 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1702 | struct type *type, |
1703 | const char *name, | |
1704 | struct obstack *obstack, | |
12df843f | 1705 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1706 | const gdb_byte **bytes, |
98bfdba5 | 1707 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1708 | |
e7c27a73 | 1709 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1710 | |
b4ba55a1 JB |
1711 | static int need_gnat_info (struct dwarf2_cu *); |
1712 | ||
3e43a32a MS |
1713 | static struct type *die_descriptive_type (struct die_info *, |
1714 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1715 | |
1716 | static void set_descriptive_type (struct type *, struct die_info *, | |
1717 | struct dwarf2_cu *); | |
1718 | ||
e7c27a73 DJ |
1719 | static struct type *die_containing_type (struct die_info *, |
1720 | struct dwarf2_cu *); | |
c906108c | 1721 | |
ff39bb5e | 1722 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1723 | struct dwarf2_cu *); |
c906108c | 1724 | |
f792889a | 1725 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1726 | |
673bfd45 DE |
1727 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1728 | ||
0d5cff50 | 1729 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1730 | |
6e70227d | 1731 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1732 | const char *suffix, int physname, |
1733 | struct dwarf2_cu *cu); | |
63d06c5c | 1734 | |
e7c27a73 | 1735 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1736 | |
348e048f DE |
1737 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1738 | ||
e7c27a73 | 1739 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1740 | |
e7c27a73 | 1741 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1742 | |
96408a79 SA |
1743 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1744 | ||
ff013f42 JK |
1745 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1746 | struct dwarf2_cu *, struct partial_symtab *); | |
1747 | ||
3a2b436a | 1748 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1749 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1750 | enum pc_bounds_kind |
1751 | { | |
e385593e | 1752 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1753 | PC_BOUNDS_NOT_PRESENT, |
1754 | ||
e385593e JK |
1755 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1756 | were present but they do not form a valid range of PC addresses. */ | |
1757 | PC_BOUNDS_INVALID, | |
1758 | ||
3a2b436a JK |
1759 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1760 | PC_BOUNDS_RANGES, | |
1761 | ||
1762 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1763 | PC_BOUNDS_HIGH_LOW, | |
1764 | }; | |
1765 | ||
1766 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1767 | CORE_ADDR *, CORE_ADDR *, | |
1768 | struct dwarf2_cu *, | |
1769 | struct partial_symtab *); | |
c906108c | 1770 | |
fae299cd DC |
1771 | static void get_scope_pc_bounds (struct die_info *, |
1772 | CORE_ADDR *, CORE_ADDR *, | |
1773 | struct dwarf2_cu *); | |
1774 | ||
801e3a5b JB |
1775 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1776 | CORE_ADDR, struct dwarf2_cu *); | |
1777 | ||
a14ed312 | 1778 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1779 | struct dwarf2_cu *); |
c906108c | 1780 | |
a14ed312 | 1781 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1782 | struct type *, struct dwarf2_cu *); |
c906108c | 1783 | |
a14ed312 | 1784 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1785 | struct die_info *, struct type *, |
e7c27a73 | 1786 | struct dwarf2_cu *); |
c906108c | 1787 | |
a14ed312 | 1788 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1789 | struct type *, |
1790 | struct dwarf2_cu *); | |
c906108c | 1791 | |
134d01f1 | 1792 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1793 | |
e7c27a73 | 1794 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1795 | |
e7c27a73 | 1796 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1797 | |
5d7cb8df JK |
1798 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1799 | ||
22cee43f PMR |
1800 | static struct using_direct **using_directives (enum language); |
1801 | ||
27aa8d6a SW |
1802 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1803 | ||
74921315 KS |
1804 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1805 | ||
f55ee35c JK |
1806 | static struct type *read_module_type (struct die_info *die, |
1807 | struct dwarf2_cu *cu); | |
1808 | ||
38d518c9 | 1809 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1810 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1811 | |
134d01f1 | 1812 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1813 | |
e7c27a73 | 1814 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1815 | |
6e70227d | 1816 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1817 | struct dwarf2_cu *); |
1818 | ||
bf6af496 | 1819 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1820 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1821 | struct die_info *); |
639d11d3 | 1822 | |
dee91e82 | 1823 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1824 | const gdb_byte *info_ptr, |
1825 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1826 | struct die_info *parent); |
1827 | ||
d521ce57 TT |
1828 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1829 | struct die_info **, const gdb_byte *, | |
1830 | int *, int); | |
3019eac3 | 1831 | |
d521ce57 TT |
1832 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1833 | struct die_info **, const gdb_byte *, | |
1834 | int *); | |
93311388 | 1835 | |
e7c27a73 | 1836 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1837 | |
15d034d0 TT |
1838 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1839 | struct obstack *); | |
71c25dea | 1840 | |
15d034d0 | 1841 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1842 | |
15d034d0 | 1843 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1844 | struct die_info *die, |
1845 | struct dwarf2_cu *cu); | |
1846 | ||
ca69b9e6 DE |
1847 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1848 | struct dwarf2_cu *cu); | |
1849 | ||
e142c38c | 1850 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1851 | struct dwarf2_cu **); |
9219021c | 1852 | |
f39c6ffd | 1853 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1854 | |
f39c6ffd | 1855 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1856 | |
f39c6ffd | 1857 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1858 | |
a121b7c1 | 1859 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1860 | |
f39c6ffd | 1861 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1862 | |
f9aca02d | 1863 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1864 | |
d97bc12b DE |
1865 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1866 | ||
1867 | static void dump_die_for_error (struct die_info *); | |
1868 | ||
1869 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1870 | struct die_info *); | |
c906108c | 1871 | |
d97bc12b | 1872 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1873 | |
51545339 | 1874 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1875 | struct dwarf2_cu *); |
c906108c | 1876 | |
ff39bb5e | 1877 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1878 | |
ff39bb5e | 1879 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1880 | |
348e048f | 1881 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1882 | const struct attribute *, |
348e048f DE |
1883 | struct dwarf2_cu **); |
1884 | ||
10b3939b | 1885 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1886 | const struct attribute *, |
f2f0e013 | 1887 | struct dwarf2_cu **); |
c906108c | 1888 | |
348e048f | 1889 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1890 | const struct attribute *, |
348e048f DE |
1891 | struct dwarf2_cu **); |
1892 | ||
ac9ec31b DE |
1893 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1894 | struct dwarf2_cu *); | |
1895 | ||
1896 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1897 | const struct attribute *, |
ac9ec31b DE |
1898 | struct dwarf2_cu *); |
1899 | ||
e5fe5e75 | 1900 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1901 | |
52dc124a | 1902 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1903 | |
63e43d3a PMR |
1904 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1905 | struct die_info *die, struct dwarf2_cu *cu, | |
1906 | struct dynamic_prop *prop); | |
1907 | ||
c906108c SS |
1908 | /* memory allocation interface */ |
1909 | ||
7b5a2f43 | 1910 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1911 | |
b60c80d6 | 1912 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1913 | |
43f3e411 | 1914 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1915 | |
6e5a29e1 | 1916 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1917 | |
6e5a29e1 | 1918 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1919 | |
6e5a29e1 | 1920 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1921 | |
6e5a29e1 | 1922 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1923 | |
8cf6f0b1 TT |
1924 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1925 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1926 | const struct attribute *attr); |
8cf6f0b1 | 1927 | |
ff39bb5e | 1928 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1929 | struct symbol *sym, |
f1e6e072 TT |
1930 | struct dwarf2_cu *cu, |
1931 | int is_block); | |
4c2df51b | 1932 | |
d521ce57 TT |
1933 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1934 | const gdb_byte *info_ptr, | |
1935 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1936 | |
72bf9492 DJ |
1937 | static void free_stack_comp_unit (void *); |
1938 | ||
72bf9492 DJ |
1939 | static hashval_t partial_die_hash (const void *item); |
1940 | ||
1941 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1942 | ||
ae038cb0 | 1943 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 1944 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1945 | |
9816fde3 | 1946 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1947 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1948 | |
1949 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1950 | struct die_info *comp_unit_die, |
1951 | enum language pretend_language); | |
93311388 | 1952 | |
68dc6402 | 1953 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1954 | |
1955 | static void free_cached_comp_units (void *); | |
1956 | ||
1957 | static void age_cached_comp_units (void); | |
1958 | ||
dee91e82 | 1959 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1960 | |
f792889a DJ |
1961 | static struct type *set_die_type (struct die_info *, struct type *, |
1962 | struct dwarf2_cu *); | |
1c379e20 | 1963 | |
ae038cb0 DJ |
1964 | static void create_all_comp_units (struct objfile *); |
1965 | ||
0e50663e | 1966 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1967 | |
95554aad TT |
1968 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1969 | enum language); | |
10b3939b | 1970 | |
95554aad TT |
1971 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1972 | enum language); | |
10b3939b | 1973 | |
f4dc4d17 DE |
1974 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1975 | enum language); | |
1976 | ||
10b3939b DJ |
1977 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1978 | struct dwarf2_per_cu_data *); | |
1979 | ||
ae038cb0 DJ |
1980 | static void dwarf2_mark (struct dwarf2_cu *); |
1981 | ||
1982 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1983 | ||
b64f50a1 | 1984 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1985 | struct dwarf2_per_cu_data *); |
673bfd45 | 1986 | |
f792889a | 1987 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1988 | |
9291a0cd TT |
1989 | static void dwarf2_release_queue (void *dummy); |
1990 | ||
95554aad TT |
1991 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1992 | enum language pretend_language); | |
1993 | ||
a0f42c21 | 1994 | static void process_queue (void); |
9291a0cd | 1995 | |
d721ba37 PA |
1996 | /* The return type of find_file_and_directory. Note, the enclosed |
1997 | string pointers are only valid while this object is valid. */ | |
1998 | ||
1999 | struct file_and_directory | |
2000 | { | |
2001 | /* The filename. This is never NULL. */ | |
2002 | const char *name; | |
2003 | ||
2004 | /* The compilation directory. NULL if not known. If we needed to | |
2005 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2006 | points directly to the DW_AT_comp_dir string attribute owned by | |
2007 | the obstack that owns the DIE. */ | |
2008 | const char *comp_dir; | |
2009 | ||
2010 | /* If we needed to build a new string for comp_dir, this is what | |
2011 | owns the storage. */ | |
2012 | std::string comp_dir_storage; | |
2013 | }; | |
2014 | ||
2015 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2016 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2017 | |
2018 | static char *file_full_name (int file, struct line_header *lh, | |
2019 | const char *comp_dir); | |
2020 | ||
43988095 JK |
2021 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2022 | enum class rcuh_kind { COMPILE, TYPE }; | |
2023 | ||
d521ce57 | 2024 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2025 | (struct comp_unit_head *header, |
2026 | struct dwarf2_section_info *section, | |
d521ce57 | 2027 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2028 | rcuh_kind section_kind); |
36586728 | 2029 | |
fd820528 | 2030 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2031 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2032 | int use_existing_cu, int keep, | |
3019eac3 DE |
2033 | die_reader_func_ftype *die_reader_func, void *data); |
2034 | ||
dee91e82 DE |
2035 | static void init_cutu_and_read_dies_simple |
2036 | (struct dwarf2_per_cu_data *this_cu, | |
2037 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2038 | |
673bfd45 | 2039 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2040 | |
3019eac3 DE |
2041 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2042 | ||
57d63ce2 DE |
2043 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2044 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2045 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2046 | |
2047 | static struct dwp_file *get_dwp_file (void); | |
2048 | ||
3019eac3 | 2049 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2050 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2051 | |
2052 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2053 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2054 | |
89e63ee4 DE |
2055 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2056 | ||
3019eac3 DE |
2057 | static void free_dwo_file_cleanup (void *); |
2058 | ||
95554aad TT |
2059 | static void process_cu_includes (void); |
2060 | ||
1b80a9fa | 2061 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2062 | |
2063 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2064 | \f |
2065 | /* Various complaints about symbol reading that don't abort the process. */ | |
2066 | ||
2067 | static void | |
2068 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2069 | { | |
2070 | complaint (&symfile_complaints, | |
2071 | _("statement list doesn't fit in .debug_line section")); | |
2072 | } | |
2073 | ||
2074 | static void | |
2075 | dwarf2_debug_line_missing_file_complaint (void) | |
2076 | { | |
2077 | complaint (&symfile_complaints, | |
2078 | _(".debug_line section has line data without a file")); | |
2079 | } | |
2080 | ||
2081 | static void | |
2082 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2083 | { | |
2084 | complaint (&symfile_complaints, | |
2085 | _(".debug_line section has line " | |
2086 | "program sequence without an end")); | |
2087 | } | |
2088 | ||
2089 | static void | |
2090 | dwarf2_complex_location_expr_complaint (void) | |
2091 | { | |
2092 | complaint (&symfile_complaints, _("location expression too complex")); | |
2093 | } | |
2094 | ||
2095 | static void | |
2096 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2097 | int arg3) | |
2098 | { | |
2099 | complaint (&symfile_complaints, | |
2100 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2101 | arg1, arg2, arg3); | |
2102 | } | |
2103 | ||
2104 | static void | |
2105 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2106 | { | |
2107 | complaint (&symfile_complaints, | |
2108 | _("debug info runs off end of %s section" | |
2109 | " [in module %s]"), | |
a32a8923 DE |
2110 | get_section_name (section), |
2111 | get_section_file_name (section)); | |
4390d890 | 2112 | } |
1b80a9fa | 2113 | |
4390d890 DE |
2114 | static void |
2115 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2116 | { | |
2117 | complaint (&symfile_complaints, | |
2118 | _("macro debug info contains a " | |
2119 | "malformed macro definition:\n`%s'"), | |
2120 | arg1); | |
2121 | } | |
2122 | ||
2123 | static void | |
2124 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2125 | { | |
2126 | complaint (&symfile_complaints, | |
2127 | _("invalid attribute class or form for '%s' in '%s'"), | |
2128 | arg1, arg2); | |
2129 | } | |
527f3840 JK |
2130 | |
2131 | /* Hash function for line_header_hash. */ | |
2132 | ||
2133 | static hashval_t | |
2134 | line_header_hash (const struct line_header *ofs) | |
2135 | { | |
9c541725 | 2136 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2137 | } |
2138 | ||
2139 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2140 | ||
2141 | static hashval_t | |
2142 | line_header_hash_voidp (const void *item) | |
2143 | { | |
9a3c8263 | 2144 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2145 | |
2146 | return line_header_hash (ofs); | |
2147 | } | |
2148 | ||
2149 | /* Equality function for line_header_hash. */ | |
2150 | ||
2151 | static int | |
2152 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2153 | { | |
9a3c8263 SM |
2154 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2155 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2156 | |
9c541725 | 2157 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2158 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2159 | } | |
2160 | ||
4390d890 | 2161 | \f |
9291a0cd TT |
2162 | #if WORDS_BIGENDIAN |
2163 | ||
2164 | /* Convert VALUE between big- and little-endian. */ | |
2165 | static offset_type | |
2166 | byte_swap (offset_type value) | |
2167 | { | |
2168 | offset_type result; | |
2169 | ||
2170 | result = (value & 0xff) << 24; | |
2171 | result |= (value & 0xff00) << 8; | |
2172 | result |= (value & 0xff0000) >> 8; | |
2173 | result |= (value & 0xff000000) >> 24; | |
2174 | return result; | |
2175 | } | |
2176 | ||
2177 | #define MAYBE_SWAP(V) byte_swap (V) | |
2178 | ||
2179 | #else | |
bc8f2430 | 2180 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) |
9291a0cd TT |
2181 | #endif /* WORDS_BIGENDIAN */ |
2182 | ||
31aa7e4e JB |
2183 | /* Read the given attribute value as an address, taking the attribute's |
2184 | form into account. */ | |
2185 | ||
2186 | static CORE_ADDR | |
2187 | attr_value_as_address (struct attribute *attr) | |
2188 | { | |
2189 | CORE_ADDR addr; | |
2190 | ||
2191 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2192 | { | |
2193 | /* Aside from a few clearly defined exceptions, attributes that | |
2194 | contain an address must always be in DW_FORM_addr form. | |
2195 | Unfortunately, some compilers happen to be violating this | |
2196 | requirement by encoding addresses using other forms, such | |
2197 | as DW_FORM_data4 for example. For those broken compilers, | |
2198 | we try to do our best, without any guarantee of success, | |
2199 | to interpret the address correctly. It would also be nice | |
2200 | to generate a complaint, but that would require us to maintain | |
2201 | a list of legitimate cases where a non-address form is allowed, | |
2202 | as well as update callers to pass in at least the CU's DWARF | |
2203 | version. This is more overhead than what we're willing to | |
2204 | expand for a pretty rare case. */ | |
2205 | addr = DW_UNSND (attr); | |
2206 | } | |
2207 | else | |
2208 | addr = DW_ADDR (attr); | |
2209 | ||
2210 | return addr; | |
2211 | } | |
2212 | ||
9291a0cd TT |
2213 | /* The suffix for an index file. */ |
2214 | #define INDEX_SUFFIX ".gdb-index" | |
2215 | ||
330cdd98 PA |
2216 | /* See declaration. */ |
2217 | ||
2218 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2219 | const dwarf2_debug_sections *names) | |
2220 | : objfile (objfile_) | |
2221 | { | |
2222 | if (names == NULL) | |
2223 | names = &dwarf2_elf_names; | |
2224 | ||
2225 | bfd *obfd = objfile->obfd; | |
2226 | ||
2227 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2228 | locate_sections (obfd, sec, *names); | |
2229 | } | |
2230 | ||
2231 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2232 | { | |
2233 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2234 | free_cached_comp_units (); | |
2235 | ||
2236 | if (quick_file_names_table) | |
2237 | htab_delete (quick_file_names_table); | |
2238 | ||
2239 | if (line_header_hash) | |
2240 | htab_delete (line_header_hash); | |
2241 | ||
2242 | /* Everything else should be on the objfile obstack. */ | |
2243 | } | |
2244 | ||
2245 | /* See declaration. */ | |
2246 | ||
2247 | void | |
2248 | dwarf2_per_objfile::free_cached_comp_units () | |
2249 | { | |
2250 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2251 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2252 | while (per_cu != NULL) | |
2253 | { | |
2254 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2255 | ||
2256 | free_heap_comp_unit (per_cu->cu); | |
2257 | *last_chain = next_cu; | |
2258 | per_cu = next_cu; | |
2259 | } | |
2260 | } | |
2261 | ||
c906108c | 2262 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2263 | information and return true if we have enough to do something. |
2264 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2265 | ELF names are used. */ | |
c906108c SS |
2266 | |
2267 | int | |
251d32d9 TG |
2268 | dwarf2_has_info (struct objfile *objfile, |
2269 | const struct dwarf2_debug_sections *names) | |
c906108c | 2270 | { |
9a3c8263 SM |
2271 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2272 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2273 | if (!dwarf2_per_objfile) |
2274 | { | |
2275 | /* Initialize per-objfile state. */ | |
2276 | struct dwarf2_per_objfile *data | |
8d749320 | 2277 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2278 | |
330cdd98 PA |
2279 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2280 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2281 | } |
73869dc2 | 2282 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2283 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2284 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2285 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2286 | } |
2287 | ||
2288 | /* Return the containing section of virtual section SECTION. */ | |
2289 | ||
2290 | static struct dwarf2_section_info * | |
2291 | get_containing_section (const struct dwarf2_section_info *section) | |
2292 | { | |
2293 | gdb_assert (section->is_virtual); | |
2294 | return section->s.containing_section; | |
c906108c SS |
2295 | } |
2296 | ||
a32a8923 DE |
2297 | /* Return the bfd owner of SECTION. */ |
2298 | ||
2299 | static struct bfd * | |
2300 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2301 | { | |
73869dc2 DE |
2302 | if (section->is_virtual) |
2303 | { | |
2304 | section = get_containing_section (section); | |
2305 | gdb_assert (!section->is_virtual); | |
2306 | } | |
049412e3 | 2307 | return section->s.section->owner; |
a32a8923 DE |
2308 | } |
2309 | ||
2310 | /* Return the bfd section of SECTION. | |
2311 | Returns NULL if the section is not present. */ | |
2312 | ||
2313 | static asection * | |
2314 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2315 | { | |
73869dc2 DE |
2316 | if (section->is_virtual) |
2317 | { | |
2318 | section = get_containing_section (section); | |
2319 | gdb_assert (!section->is_virtual); | |
2320 | } | |
049412e3 | 2321 | return section->s.section; |
a32a8923 DE |
2322 | } |
2323 | ||
2324 | /* Return the name of SECTION. */ | |
2325 | ||
2326 | static const char * | |
2327 | get_section_name (const struct dwarf2_section_info *section) | |
2328 | { | |
2329 | asection *sectp = get_section_bfd_section (section); | |
2330 | ||
2331 | gdb_assert (sectp != NULL); | |
2332 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2333 | } | |
2334 | ||
2335 | /* Return the name of the file SECTION is in. */ | |
2336 | ||
2337 | static const char * | |
2338 | get_section_file_name (const struct dwarf2_section_info *section) | |
2339 | { | |
2340 | bfd *abfd = get_section_bfd_owner (section); | |
2341 | ||
2342 | return bfd_get_filename (abfd); | |
2343 | } | |
2344 | ||
2345 | /* Return the id of SECTION. | |
2346 | Returns 0 if SECTION doesn't exist. */ | |
2347 | ||
2348 | static int | |
2349 | get_section_id (const struct dwarf2_section_info *section) | |
2350 | { | |
2351 | asection *sectp = get_section_bfd_section (section); | |
2352 | ||
2353 | if (sectp == NULL) | |
2354 | return 0; | |
2355 | return sectp->id; | |
2356 | } | |
2357 | ||
2358 | /* Return the flags of SECTION. | |
73869dc2 | 2359 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2360 | |
2361 | static int | |
2362 | get_section_flags (const struct dwarf2_section_info *section) | |
2363 | { | |
2364 | asection *sectp = get_section_bfd_section (section); | |
2365 | ||
2366 | gdb_assert (sectp != NULL); | |
2367 | return bfd_get_section_flags (sectp->owner, sectp); | |
2368 | } | |
2369 | ||
251d32d9 TG |
2370 | /* When loading sections, we look either for uncompressed section or for |
2371 | compressed section names. */ | |
233a11ab CS |
2372 | |
2373 | static int | |
251d32d9 TG |
2374 | section_is_p (const char *section_name, |
2375 | const struct dwarf2_section_names *names) | |
233a11ab | 2376 | { |
251d32d9 TG |
2377 | if (names->normal != NULL |
2378 | && strcmp (section_name, names->normal) == 0) | |
2379 | return 1; | |
2380 | if (names->compressed != NULL | |
2381 | && strcmp (section_name, names->compressed) == 0) | |
2382 | return 1; | |
2383 | return 0; | |
233a11ab CS |
2384 | } |
2385 | ||
330cdd98 | 2386 | /* See declaration. */ |
c906108c | 2387 | |
330cdd98 PA |
2388 | void |
2389 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2390 | const dwarf2_debug_sections &names) | |
c906108c | 2391 | { |
dc7650b8 | 2392 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2393 | |
dc7650b8 JK |
2394 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2395 | { | |
2396 | } | |
330cdd98 | 2397 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2398 | { |
330cdd98 PA |
2399 | this->info.s.section = sectp; |
2400 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2401 | } |
330cdd98 | 2402 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2403 | { |
330cdd98 PA |
2404 | this->abbrev.s.section = sectp; |
2405 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2406 | } |
330cdd98 | 2407 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2408 | { |
330cdd98 PA |
2409 | this->line.s.section = sectp; |
2410 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2411 | } |
330cdd98 | 2412 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2413 | { |
330cdd98 PA |
2414 | this->loc.s.section = sectp; |
2415 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2416 | } |
330cdd98 | 2417 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2418 | { |
330cdd98 PA |
2419 | this->loclists.s.section = sectp; |
2420 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2421 | } |
330cdd98 | 2422 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2423 | { |
330cdd98 PA |
2424 | this->macinfo.s.section = sectp; |
2425 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2426 | } |
330cdd98 | 2427 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2428 | { |
330cdd98 PA |
2429 | this->macro.s.section = sectp; |
2430 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2431 | } |
330cdd98 | 2432 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2433 | { |
330cdd98 PA |
2434 | this->str.s.section = sectp; |
2435 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2436 | } |
330cdd98 | 2437 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2438 | { |
330cdd98 PA |
2439 | this->line_str.s.section = sectp; |
2440 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2441 | } |
330cdd98 | 2442 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2443 | { |
330cdd98 PA |
2444 | this->addr.s.section = sectp; |
2445 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2446 | } |
330cdd98 | 2447 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2448 | { |
330cdd98 PA |
2449 | this->frame.s.section = sectp; |
2450 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2451 | } |
330cdd98 | 2452 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2453 | { |
330cdd98 PA |
2454 | this->eh_frame.s.section = sectp; |
2455 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2456 | } |
330cdd98 | 2457 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2458 | { |
330cdd98 PA |
2459 | this->ranges.s.section = sectp; |
2460 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2461 | } |
330cdd98 | 2462 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2463 | { |
330cdd98 PA |
2464 | this->rnglists.s.section = sectp; |
2465 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2466 | } |
330cdd98 | 2467 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2468 | { |
8b70b953 TT |
2469 | struct dwarf2_section_info type_section; |
2470 | ||
2471 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2472 | type_section.s.section = sectp; |
8b70b953 TT |
2473 | type_section.size = bfd_get_section_size (sectp); |
2474 | ||
330cdd98 | 2475 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2476 | &type_section); |
348e048f | 2477 | } |
330cdd98 | 2478 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2479 | { |
330cdd98 PA |
2480 | this->gdb_index.s.section = sectp; |
2481 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2482 | } |
dce234bc | 2483 | |
b4e1fd61 | 2484 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2485 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2486 | this->has_section_at_zero = true; |
c906108c SS |
2487 | } |
2488 | ||
fceca515 DE |
2489 | /* A helper function that decides whether a section is empty, |
2490 | or not present. */ | |
9e0ac564 TT |
2491 | |
2492 | static int | |
19ac8c2e | 2493 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2494 | { |
73869dc2 DE |
2495 | if (section->is_virtual) |
2496 | return section->size == 0; | |
049412e3 | 2497 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2498 | } |
2499 | ||
3019eac3 DE |
2500 | /* Read the contents of the section INFO. |
2501 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2502 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2503 | of the DWO file. | |
dce234bc | 2504 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2505 | |
dce234bc PP |
2506 | static void |
2507 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2508 | { |
a32a8923 | 2509 | asection *sectp; |
3019eac3 | 2510 | bfd *abfd; |
dce234bc | 2511 | gdb_byte *buf, *retbuf; |
c906108c | 2512 | |
be391dca TT |
2513 | if (info->readin) |
2514 | return; | |
dce234bc | 2515 | info->buffer = NULL; |
be391dca | 2516 | info->readin = 1; |
188dd5d6 | 2517 | |
9e0ac564 | 2518 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2519 | return; |
c906108c | 2520 | |
a32a8923 | 2521 | sectp = get_section_bfd_section (info); |
3019eac3 | 2522 | |
73869dc2 DE |
2523 | /* If this is a virtual section we need to read in the real one first. */ |
2524 | if (info->is_virtual) | |
2525 | { | |
2526 | struct dwarf2_section_info *containing_section = | |
2527 | get_containing_section (info); | |
2528 | ||
2529 | gdb_assert (sectp != NULL); | |
2530 | if ((sectp->flags & SEC_RELOC) != 0) | |
2531 | { | |
2532 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2533 | " supported in section %s [in module %s]"), | |
2534 | get_section_name (info), get_section_file_name (info)); | |
2535 | } | |
2536 | dwarf2_read_section (objfile, containing_section); | |
2537 | /* Other code should have already caught virtual sections that don't | |
2538 | fit. */ | |
2539 | gdb_assert (info->virtual_offset + info->size | |
2540 | <= containing_section->size); | |
2541 | /* If the real section is empty or there was a problem reading the | |
2542 | section we shouldn't get here. */ | |
2543 | gdb_assert (containing_section->buffer != NULL); | |
2544 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2545 | return; | |
2546 | } | |
2547 | ||
4bf44c1c TT |
2548 | /* If the section has relocations, we must read it ourselves. |
2549 | Otherwise we attach it to the BFD. */ | |
2550 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2551 | { |
d521ce57 | 2552 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2553 | return; |
dce234bc | 2554 | } |
dce234bc | 2555 | |
224c3ddb | 2556 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2557 | info->buffer = buf; |
dce234bc PP |
2558 | |
2559 | /* When debugging .o files, we may need to apply relocations; see | |
2560 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2561 | We never compress sections in .o files, so we only need to | |
2562 | try this when the section is not compressed. */ | |
ac8035ab | 2563 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2564 | if (retbuf != NULL) |
2565 | { | |
2566 | info->buffer = retbuf; | |
2567 | return; | |
2568 | } | |
2569 | ||
a32a8923 DE |
2570 | abfd = get_section_bfd_owner (info); |
2571 | gdb_assert (abfd != NULL); | |
2572 | ||
dce234bc PP |
2573 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2574 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2575 | { |
2576 | error (_("Dwarf Error: Can't read DWARF data" | |
2577 | " in section %s [in module %s]"), | |
2578 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2579 | } | |
dce234bc PP |
2580 | } |
2581 | ||
9e0ac564 TT |
2582 | /* A helper function that returns the size of a section in a safe way. |
2583 | If you are positive that the section has been read before using the | |
2584 | size, then it is safe to refer to the dwarf2_section_info object's | |
2585 | "size" field directly. In other cases, you must call this | |
2586 | function, because for compressed sections the size field is not set | |
2587 | correctly until the section has been read. */ | |
2588 | ||
2589 | static bfd_size_type | |
2590 | dwarf2_section_size (struct objfile *objfile, | |
2591 | struct dwarf2_section_info *info) | |
2592 | { | |
2593 | if (!info->readin) | |
2594 | dwarf2_read_section (objfile, info); | |
2595 | return info->size; | |
2596 | } | |
2597 | ||
dce234bc | 2598 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2599 | SECTION_NAME. */ |
af34e669 | 2600 | |
dce234bc | 2601 | void |
3017a003 TG |
2602 | dwarf2_get_section_info (struct objfile *objfile, |
2603 | enum dwarf2_section_enum sect, | |
d521ce57 | 2604 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2605 | bfd_size_type *sizep) |
2606 | { | |
2607 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2608 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2609 | dwarf2_objfile_data_key); | |
dce234bc | 2610 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2611 | |
2612 | /* We may see an objfile without any DWARF, in which case we just | |
2613 | return nothing. */ | |
2614 | if (data == NULL) | |
2615 | { | |
2616 | *sectp = NULL; | |
2617 | *bufp = NULL; | |
2618 | *sizep = 0; | |
2619 | return; | |
2620 | } | |
3017a003 TG |
2621 | switch (sect) |
2622 | { | |
2623 | case DWARF2_DEBUG_FRAME: | |
2624 | info = &data->frame; | |
2625 | break; | |
2626 | case DWARF2_EH_FRAME: | |
2627 | info = &data->eh_frame; | |
2628 | break; | |
2629 | default: | |
2630 | gdb_assert_not_reached ("unexpected section"); | |
2631 | } | |
dce234bc | 2632 | |
9e0ac564 | 2633 | dwarf2_read_section (objfile, info); |
dce234bc | 2634 | |
a32a8923 | 2635 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2636 | *bufp = info->buffer; |
2637 | *sizep = info->size; | |
2638 | } | |
2639 | ||
36586728 TT |
2640 | /* A helper function to find the sections for a .dwz file. */ |
2641 | ||
2642 | static void | |
2643 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2644 | { | |
9a3c8263 | 2645 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2646 | |
2647 | /* Note that we only support the standard ELF names, because .dwz | |
2648 | is ELF-only (at the time of writing). */ | |
2649 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2650 | { | |
049412e3 | 2651 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2652 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2653 | } | |
2654 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2655 | { | |
049412e3 | 2656 | dwz_file->info.s.section = sectp; |
36586728 TT |
2657 | dwz_file->info.size = bfd_get_section_size (sectp); |
2658 | } | |
2659 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2660 | { | |
049412e3 | 2661 | dwz_file->str.s.section = sectp; |
36586728 TT |
2662 | dwz_file->str.size = bfd_get_section_size (sectp); |
2663 | } | |
2664 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2665 | { | |
049412e3 | 2666 | dwz_file->line.s.section = sectp; |
36586728 TT |
2667 | dwz_file->line.size = bfd_get_section_size (sectp); |
2668 | } | |
2669 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2670 | { | |
049412e3 | 2671 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2672 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2673 | } | |
2ec9a5e0 TT |
2674 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2675 | { | |
049412e3 | 2676 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2677 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2678 | } | |
36586728 TT |
2679 | } |
2680 | ||
4db1a1dc TT |
2681 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2682 | there is no .gnu_debugaltlink section in the file. Error if there | |
2683 | is such a section but the file cannot be found. */ | |
36586728 TT |
2684 | |
2685 | static struct dwz_file * | |
2686 | dwarf2_get_dwz_file (void) | |
2687 | { | |
4db1a1dc | 2688 | char *data; |
36586728 TT |
2689 | struct cleanup *cleanup; |
2690 | const char *filename; | |
2691 | struct dwz_file *result; | |
acd13123 | 2692 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2693 | size_t buildid_len; |
2694 | bfd_byte *buildid; | |
36586728 TT |
2695 | |
2696 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2697 | return dwarf2_per_objfile->dwz_file; | |
2698 | ||
4db1a1dc TT |
2699 | bfd_set_error (bfd_error_no_error); |
2700 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2701 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2702 | if (data == NULL) |
2703 | { | |
2704 | if (bfd_get_error () == bfd_error_no_error) | |
2705 | return NULL; | |
2706 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2707 | bfd_errmsg (bfd_get_error ())); | |
2708 | } | |
36586728 | 2709 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2710 | make_cleanup (xfree, buildid); |
36586728 | 2711 | |
acd13123 TT |
2712 | buildid_len = (size_t) buildid_len_arg; |
2713 | ||
f9d83a0b | 2714 | filename = (const char *) data; |
d721ba37 PA |
2715 | |
2716 | std::string abs_storage; | |
36586728 TT |
2717 | if (!IS_ABSOLUTE_PATH (filename)) |
2718 | { | |
14278e1f TT |
2719 | gdb::unique_xmalloc_ptr<char> abs |
2720 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2721 | |
14278e1f | 2722 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2723 | filename = abs_storage.c_str (); |
36586728 TT |
2724 | } |
2725 | ||
dc294be5 TT |
2726 | /* First try the file name given in the section. If that doesn't |
2727 | work, try to use the build-id instead. */ | |
192b62ce | 2728 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2729 | if (dwz_bfd != NULL) |
36586728 | 2730 | { |
192b62ce TT |
2731 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2732 | dwz_bfd.release (); | |
36586728 TT |
2733 | } |
2734 | ||
dc294be5 TT |
2735 | if (dwz_bfd == NULL) |
2736 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2737 | ||
2738 | if (dwz_bfd == NULL) | |
2739 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2740 | objfile_name (dwarf2_per_objfile->objfile)); | |
2741 | ||
36586728 TT |
2742 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2743 | struct dwz_file); | |
192b62ce | 2744 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2745 | |
192b62ce | 2746 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 TT |
2747 | |
2748 | do_cleanups (cleanup); | |
2749 | ||
192b62ce | 2750 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2751 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2752 | return result; |
2753 | } | |
9291a0cd | 2754 | \f |
7b9f3c50 DE |
2755 | /* DWARF quick_symbols_functions support. */ |
2756 | ||
2757 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2758 | unique line tables, so we maintain a separate table of all .debug_line | |
2759 | derived entries to support the sharing. | |
2760 | All the quick functions need is the list of file names. We discard the | |
2761 | line_header when we're done and don't need to record it here. */ | |
2762 | struct quick_file_names | |
2763 | { | |
094b34ac DE |
2764 | /* The data used to construct the hash key. */ |
2765 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2766 | |
2767 | /* The number of entries in file_names, real_names. */ | |
2768 | unsigned int num_file_names; | |
2769 | ||
2770 | /* The file names from the line table, after being run through | |
2771 | file_full_name. */ | |
2772 | const char **file_names; | |
2773 | ||
2774 | /* The file names from the line table after being run through | |
2775 | gdb_realpath. These are computed lazily. */ | |
2776 | const char **real_names; | |
2777 | }; | |
2778 | ||
2779 | /* When using the index (and thus not using psymtabs), each CU has an | |
2780 | object of this type. This is used to hold information needed by | |
2781 | the various "quick" methods. */ | |
2782 | struct dwarf2_per_cu_quick_data | |
2783 | { | |
2784 | /* The file table. This can be NULL if there was no file table | |
2785 | or it's currently not read in. | |
2786 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2787 | struct quick_file_names *file_names; | |
2788 | ||
2789 | /* The corresponding symbol table. This is NULL if symbols for this | |
2790 | CU have not yet been read. */ | |
43f3e411 | 2791 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2792 | |
2793 | /* A temporary mark bit used when iterating over all CUs in | |
2794 | expand_symtabs_matching. */ | |
2795 | unsigned int mark : 1; | |
2796 | ||
2797 | /* True if we've tried to read the file table and found there isn't one. | |
2798 | There will be no point in trying to read it again next time. */ | |
2799 | unsigned int no_file_data : 1; | |
2800 | }; | |
2801 | ||
094b34ac DE |
2802 | /* Utility hash function for a stmt_list_hash. */ |
2803 | ||
2804 | static hashval_t | |
2805 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2806 | { | |
2807 | hashval_t v = 0; | |
2808 | ||
2809 | if (stmt_list_hash->dwo_unit != NULL) | |
2810 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2811 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2812 | return v; |
2813 | } | |
2814 | ||
2815 | /* Utility equality function for a stmt_list_hash. */ | |
2816 | ||
2817 | static int | |
2818 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2819 | const struct stmt_list_hash *rhs) | |
2820 | { | |
2821 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2822 | return 0; | |
2823 | if (lhs->dwo_unit != NULL | |
2824 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2825 | return 0; | |
2826 | ||
9c541725 | 2827 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2828 | } |
2829 | ||
7b9f3c50 DE |
2830 | /* Hash function for a quick_file_names. */ |
2831 | ||
2832 | static hashval_t | |
2833 | hash_file_name_entry (const void *e) | |
2834 | { | |
9a3c8263 SM |
2835 | const struct quick_file_names *file_data |
2836 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2837 | |
094b34ac | 2838 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2839 | } |
2840 | ||
2841 | /* Equality function for a quick_file_names. */ | |
2842 | ||
2843 | static int | |
2844 | eq_file_name_entry (const void *a, const void *b) | |
2845 | { | |
9a3c8263 SM |
2846 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2847 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2848 | |
094b34ac | 2849 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2850 | } |
2851 | ||
2852 | /* Delete function for a quick_file_names. */ | |
2853 | ||
2854 | static void | |
2855 | delete_file_name_entry (void *e) | |
2856 | { | |
9a3c8263 | 2857 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2858 | int i; |
2859 | ||
2860 | for (i = 0; i < file_data->num_file_names; ++i) | |
2861 | { | |
2862 | xfree ((void*) file_data->file_names[i]); | |
2863 | if (file_data->real_names) | |
2864 | xfree ((void*) file_data->real_names[i]); | |
2865 | } | |
2866 | ||
2867 | /* The space for the struct itself lives on objfile_obstack, | |
2868 | so we don't free it here. */ | |
2869 | } | |
2870 | ||
2871 | /* Create a quick_file_names hash table. */ | |
2872 | ||
2873 | static htab_t | |
2874 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2875 | { | |
2876 | return htab_create_alloc (nr_initial_entries, | |
2877 | hash_file_name_entry, eq_file_name_entry, | |
2878 | delete_file_name_entry, xcalloc, xfree); | |
2879 | } | |
9291a0cd | 2880 | |
918dd910 JK |
2881 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2882 | have to be created afterwards. You should call age_cached_comp_units after | |
2883 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2884 | ||
2885 | static void | |
2886 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2887 | { | |
3019eac3 | 2888 | if (per_cu->is_debug_types) |
e5fe5e75 | 2889 | load_full_type_unit (per_cu); |
918dd910 | 2890 | else |
95554aad | 2891 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2892 | |
cc12ce38 DE |
2893 | if (per_cu->cu == NULL) |
2894 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2895 | |
2896 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2897 | } |
2898 | ||
a0f42c21 | 2899 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2900 | |
9291a0cd | 2901 | static void |
a0f42c21 | 2902 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2903 | { |
2904 | struct cleanup *back_to; | |
2905 | ||
f4dc4d17 DE |
2906 | /* Skip type_unit_groups, reading the type units they contain |
2907 | is handled elsewhere. */ | |
2908 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2909 | return; | |
2910 | ||
9291a0cd TT |
2911 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2912 | ||
95554aad | 2913 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2914 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2915 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2916 | { | |
2917 | queue_comp_unit (per_cu, language_minimal); | |
2918 | load_cu (per_cu); | |
89e63ee4 DE |
2919 | |
2920 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2921 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2922 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2923 | if (!per_cu->is_debug_types | |
cc12ce38 | 2924 | && per_cu->cu != NULL |
89e63ee4 DE |
2925 | && per_cu->cu->dwo_unit != NULL |
2926 | && dwarf2_per_objfile->index_table != NULL | |
2927 | && dwarf2_per_objfile->index_table->version <= 7 | |
2928 | /* DWP files aren't supported yet. */ | |
2929 | && get_dwp_file () == NULL) | |
2930 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2931 | } |
9291a0cd | 2932 | |
a0f42c21 | 2933 | process_queue (); |
9291a0cd TT |
2934 | |
2935 | /* Age the cache, releasing compilation units that have not | |
2936 | been used recently. */ | |
2937 | age_cached_comp_units (); | |
2938 | ||
2939 | do_cleanups (back_to); | |
2940 | } | |
2941 | ||
2942 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2943 | the objfile from which this CU came. Returns the resulting symbol | |
2944 | table. */ | |
2fdf6df6 | 2945 | |
43f3e411 | 2946 | static struct compunit_symtab * |
a0f42c21 | 2947 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2948 | { |
95554aad | 2949 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2950 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2951 | { |
2952 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 2953 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 2954 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2955 | process_cu_includes (); |
9291a0cd TT |
2956 | do_cleanups (back_to); |
2957 | } | |
f194fefb | 2958 | |
43f3e411 | 2959 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2960 | } |
2961 | ||
8832e7e3 | 2962 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2963 | |
2964 | This is intended for loops like: | |
2965 | ||
2966 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2967 | + dwarf2_per_objfile->n_type_units); ++i) | |
2968 | { | |
8832e7e3 | 2969 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2970 | |
2971 | ...; | |
2972 | } | |
2973 | */ | |
2fdf6df6 | 2974 | |
1fd400ff | 2975 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2976 | dw2_get_cutu (int index) |
1fd400ff TT |
2977 | { |
2978 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2979 | { | |
f4dc4d17 | 2980 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2981 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2982 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2983 | } |
2984 | ||
2985 | return dwarf2_per_objfile->all_comp_units[index]; | |
2986 | } | |
2987 | ||
8832e7e3 DE |
2988 | /* Return the CU given its index. |
2989 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2990 | refers to a CU. */ | |
f4dc4d17 DE |
2991 | |
2992 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2993 | dw2_get_cu (int index) |
f4dc4d17 | 2994 | { |
8832e7e3 | 2995 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2996 | |
1fd400ff TT |
2997 | return dwarf2_per_objfile->all_comp_units[index]; |
2998 | } | |
2999 | ||
2ec9a5e0 TT |
3000 | /* A helper for create_cus_from_index that handles a given list of |
3001 | CUs. */ | |
2fdf6df6 | 3002 | |
74a0d9f6 | 3003 | static void |
2ec9a5e0 TT |
3004 | create_cus_from_index_list (struct objfile *objfile, |
3005 | const gdb_byte *cu_list, offset_type n_elements, | |
3006 | struct dwarf2_section_info *section, | |
3007 | int is_dwz, | |
3008 | int base_offset) | |
9291a0cd TT |
3009 | { |
3010 | offset_type i; | |
9291a0cd | 3011 | |
2ec9a5e0 | 3012 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3013 | { |
74a0d9f6 | 3014 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3015 | |
3016 | sect_offset sect_off | |
3017 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3018 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3019 | cu_list += 2 * 8; |
3020 | ||
9c541725 PA |
3021 | dwarf2_per_cu_data *the_cu |
3022 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3023 | struct dwarf2_per_cu_data); | |
3024 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3025 | the_cu->length = length; |
3026 | the_cu->objfile = objfile; | |
8a0459fd | 3027 | the_cu->section = section; |
9291a0cd TT |
3028 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3029 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3030 | the_cu->is_dwz = is_dwz; |
3031 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3032 | } |
9291a0cd TT |
3033 | } |
3034 | ||
2ec9a5e0 | 3035 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3036 | the CU objects for this objfile. */ |
2ec9a5e0 | 3037 | |
74a0d9f6 | 3038 | static void |
2ec9a5e0 TT |
3039 | create_cus_from_index (struct objfile *objfile, |
3040 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3041 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3042 | { | |
3043 | struct dwz_file *dwz; | |
3044 | ||
3045 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3046 | dwarf2_per_objfile->all_comp_units = |
3047 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3048 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3049 | |
74a0d9f6 JK |
3050 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3051 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3052 | |
3053 | if (dwz_elements == 0) | |
74a0d9f6 | 3054 | return; |
2ec9a5e0 TT |
3055 | |
3056 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3057 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3058 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3059 | } |
3060 | ||
1fd400ff | 3061 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3062 | |
74a0d9f6 | 3063 | static void |
673bfd45 | 3064 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3065 | struct dwarf2_section_info *section, |
673bfd45 DE |
3066 | const gdb_byte *bytes, |
3067 | offset_type elements) | |
1fd400ff TT |
3068 | { |
3069 | offset_type i; | |
673bfd45 | 3070 | htab_t sig_types_hash; |
1fd400ff | 3071 | |
6aa5f3a6 DE |
3072 | dwarf2_per_objfile->n_type_units |
3073 | = dwarf2_per_objfile->n_allocated_type_units | |
3074 | = elements / 3; | |
8d749320 SM |
3075 | dwarf2_per_objfile->all_type_units = |
3076 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3077 | |
673bfd45 | 3078 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3079 | |
3080 | for (i = 0; i < elements; i += 3) | |
3081 | { | |
52dc124a | 3082 | struct signatured_type *sig_type; |
9c541725 | 3083 | ULONGEST signature; |
1fd400ff | 3084 | void **slot; |
9c541725 | 3085 | cu_offset type_offset_in_tu; |
1fd400ff | 3086 | |
74a0d9f6 | 3087 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3088 | sect_offset sect_off |
3089 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3090 | type_offset_in_tu | |
3091 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3092 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3093 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3094 | bytes += 3 * 8; | |
3095 | ||
52dc124a | 3096 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3097 | struct signatured_type); |
52dc124a | 3098 | sig_type->signature = signature; |
9c541725 | 3099 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3100 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3101 | sig_type->per_cu.section = section; |
9c541725 | 3102 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3103 | sig_type->per_cu.objfile = objfile; |
3104 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3105 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3106 | struct dwarf2_per_cu_quick_data); | |
3107 | ||
52dc124a DE |
3108 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3109 | *slot = sig_type; | |
1fd400ff | 3110 | |
b4dd5633 | 3111 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3112 | } |
3113 | ||
673bfd45 | 3114 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3115 | } |
3116 | ||
9291a0cd TT |
3117 | /* Read the address map data from the mapped index, and use it to |
3118 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3119 | |
9291a0cd TT |
3120 | static void |
3121 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3122 | { | |
3e29f34a | 3123 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3124 | const gdb_byte *iter, *end; |
9291a0cd | 3125 | struct addrmap *mutable_map; |
9291a0cd TT |
3126 | CORE_ADDR baseaddr; |
3127 | ||
8268c778 PA |
3128 | auto_obstack temp_obstack; |
3129 | ||
9291a0cd TT |
3130 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3131 | ||
3132 | iter = index->address_table; | |
3133 | end = iter + index->address_table_size; | |
3134 | ||
3135 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3136 | ||
3137 | while (iter < end) | |
3138 | { | |
3139 | ULONGEST hi, lo, cu_index; | |
3140 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3141 | iter += 8; | |
3142 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3143 | iter += 8; | |
3144 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3145 | iter += 4; | |
f652bce2 | 3146 | |
24a55014 | 3147 | if (lo > hi) |
f652bce2 | 3148 | { |
24a55014 DE |
3149 | complaint (&symfile_complaints, |
3150 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3151 | hex_string (lo), hex_string (hi)); |
24a55014 | 3152 | continue; |
f652bce2 | 3153 | } |
24a55014 DE |
3154 | |
3155 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3156 | { |
3157 | complaint (&symfile_complaints, | |
3158 | _(".gdb_index address table has invalid CU number %u"), | |
3159 | (unsigned) cu_index); | |
24a55014 | 3160 | continue; |
f652bce2 | 3161 | } |
24a55014 | 3162 | |
3e29f34a MR |
3163 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3164 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3165 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3166 | } |
3167 | ||
3168 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3169 | &objfile->objfile_obstack); | |
9291a0cd TT |
3170 | } |
3171 | ||
59d7bcaf JK |
3172 | /* The hash function for strings in the mapped index. This is the same as |
3173 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3174 | implementation. This is necessary because the hash function is tied to the | |
3175 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3176 | SYMBOL_HASH_NEXT. |
3177 | ||
3178 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3179 | |
9291a0cd | 3180 | static hashval_t |
559a7a62 | 3181 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3182 | { |
3183 | const unsigned char *str = (const unsigned char *) p; | |
3184 | hashval_t r = 0; | |
3185 | unsigned char c; | |
3186 | ||
3187 | while ((c = *str++) != 0) | |
559a7a62 JK |
3188 | { |
3189 | if (index_version >= 5) | |
3190 | c = tolower (c); | |
3191 | r = r * 67 + c - 113; | |
3192 | } | |
9291a0cd TT |
3193 | |
3194 | return r; | |
3195 | } | |
3196 | ||
3197 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3198 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
3199 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 3200 | |
9291a0cd TT |
3201 | static int |
3202 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
3203 | offset_type **vec_out) | |
3204 | { | |
0cf03b49 JK |
3205 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
3206 | offset_type hash; | |
9291a0cd | 3207 | offset_type slot, step; |
559a7a62 | 3208 | int (*cmp) (const char *, const char *); |
9291a0cd | 3209 | |
0cf03b49 | 3210 | if (current_language->la_language == language_cplus |
45280282 IB |
3211 | || current_language->la_language == language_fortran |
3212 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3213 | { |
3214 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3215 | not contain any. */ | |
a8719064 | 3216 | |
72998fb3 | 3217 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3218 | { |
72998fb3 | 3219 | char *without_params = cp_remove_params (name); |
0cf03b49 | 3220 | |
72998fb3 DE |
3221 | if (without_params != NULL) |
3222 | { | |
3223 | make_cleanup (xfree, without_params); | |
3224 | name = without_params; | |
3225 | } | |
0cf03b49 JK |
3226 | } |
3227 | } | |
3228 | ||
559a7a62 | 3229 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3230 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3231 | simulate our NAME being searched is also lowercased. */ |
3232 | hash = mapped_index_string_hash ((index->version == 4 | |
3233 | && case_sensitivity == case_sensitive_off | |
3234 | ? 5 : index->version), | |
3235 | name); | |
3236 | ||
3876f04e DE |
3237 | slot = hash & (index->symbol_table_slots - 1); |
3238 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3239 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3240 | |
3241 | for (;;) | |
3242 | { | |
3243 | /* Convert a slot number to an offset into the table. */ | |
3244 | offset_type i = 2 * slot; | |
3245 | const char *str; | |
3876f04e | 3246 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
3247 | { |
3248 | do_cleanups (back_to); | |
3249 | return 0; | |
3250 | } | |
9291a0cd | 3251 | |
3876f04e | 3252 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3253 | if (!cmp (name, str)) |
9291a0cd TT |
3254 | { |
3255 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3256 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 3257 | do_cleanups (back_to); |
9291a0cd TT |
3258 | return 1; |
3259 | } | |
3260 | ||
3876f04e | 3261 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3262 | } |
3263 | } | |
3264 | ||
2ec9a5e0 TT |
3265 | /* A helper function that reads the .gdb_index from SECTION and fills |
3266 | in MAP. FILENAME is the name of the file containing the section; | |
3267 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3268 | ok to use deprecated sections. | |
3269 | ||
3270 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3271 | out parameters that are filled in with information about the CU and | |
3272 | TU lists in the section. | |
3273 | ||
3274 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3275 | |
9291a0cd | 3276 | static int |
2ec9a5e0 TT |
3277 | read_index_from_section (struct objfile *objfile, |
3278 | const char *filename, | |
3279 | int deprecated_ok, | |
3280 | struct dwarf2_section_info *section, | |
3281 | struct mapped_index *map, | |
3282 | const gdb_byte **cu_list, | |
3283 | offset_type *cu_list_elements, | |
3284 | const gdb_byte **types_list, | |
3285 | offset_type *types_list_elements) | |
9291a0cd | 3286 | { |
948f8e3d | 3287 | const gdb_byte *addr; |
2ec9a5e0 | 3288 | offset_type version; |
b3b272e1 | 3289 | offset_type *metadata; |
1fd400ff | 3290 | int i; |
9291a0cd | 3291 | |
2ec9a5e0 | 3292 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3293 | return 0; |
82430852 JK |
3294 | |
3295 | /* Older elfutils strip versions could keep the section in the main | |
3296 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3297 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3298 | return 0; |
3299 | ||
2ec9a5e0 | 3300 | dwarf2_read_section (objfile, section); |
9291a0cd | 3301 | |
2ec9a5e0 | 3302 | addr = section->buffer; |
9291a0cd | 3303 | /* Version check. */ |
1fd400ff | 3304 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3305 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3306 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3307 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3308 | indices. */ |
831adc1f | 3309 | if (version < 4) |
481860b3 GB |
3310 | { |
3311 | static int warning_printed = 0; | |
3312 | if (!warning_printed) | |
3313 | { | |
3314 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3315 | filename); |
481860b3 GB |
3316 | warning_printed = 1; |
3317 | } | |
3318 | return 0; | |
3319 | } | |
3320 | /* Index version 4 uses a different hash function than index version | |
3321 | 5 and later. | |
3322 | ||
3323 | Versions earlier than 6 did not emit psymbols for inlined | |
3324 | functions. Using these files will cause GDB not to be able to | |
3325 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3326 | indices unless the user has done |
3327 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3328 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3329 | { |
3330 | static int warning_printed = 0; | |
3331 | if (!warning_printed) | |
3332 | { | |
e615022a DE |
3333 | warning (_("\ |
3334 | Skipping deprecated .gdb_index section in %s.\n\ | |
3335 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3336 | to use the section anyway."), | |
2ec9a5e0 | 3337 | filename); |
481860b3 GB |
3338 | warning_printed = 1; |
3339 | } | |
3340 | return 0; | |
3341 | } | |
796a7ff8 | 3342 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3343 | of the TU (for symbols coming from TUs), |
3344 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3345 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3346 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3347 | These are just performance bugs, and we can't distinguish gdb-generated | |
3348 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3349 | |
481860b3 | 3350 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3351 | longer backward compatible. */ |
796a7ff8 | 3352 | if (version > 8) |
594e8718 | 3353 | return 0; |
9291a0cd | 3354 | |
559a7a62 | 3355 | map->version = version; |
2ec9a5e0 | 3356 | map->total_size = section->size; |
9291a0cd TT |
3357 | |
3358 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3359 | |
3360 | i = 0; | |
2ec9a5e0 TT |
3361 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3362 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3363 | / 8); | |
1fd400ff TT |
3364 | ++i; |
3365 | ||
2ec9a5e0 TT |
3366 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3367 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3368 | - MAYBE_SWAP (metadata[i])) | |
3369 | / 8); | |
987d643c | 3370 | ++i; |
1fd400ff TT |
3371 | |
3372 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3373 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3374 | - MAYBE_SWAP (metadata[i])); | |
3375 | ++i; | |
3376 | ||
3876f04e DE |
3377 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3378 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3379 | - MAYBE_SWAP (metadata[i])) | |
3380 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3381 | ++i; |
9291a0cd | 3382 | |
f9d83a0b | 3383 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3384 | |
2ec9a5e0 TT |
3385 | return 1; |
3386 | } | |
3387 | ||
3388 | ||
3389 | /* Read the index file. If everything went ok, initialize the "quick" | |
3390 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3391 | ||
3392 | static int | |
3393 | dwarf2_read_index (struct objfile *objfile) | |
3394 | { | |
3395 | struct mapped_index local_map, *map; | |
3396 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3397 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3398 | struct dwz_file *dwz; |
2ec9a5e0 | 3399 | |
4262abfb | 3400 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3401 | use_deprecated_index_sections, |
3402 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3403 | &cu_list, &cu_list_elements, | |
3404 | &types_list, &types_list_elements)) | |
3405 | return 0; | |
3406 | ||
0fefef59 | 3407 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3408 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3409 | return 0; |
3410 | ||
2ec9a5e0 TT |
3411 | /* If there is a .dwz file, read it so we can get its CU list as |
3412 | well. */ | |
4db1a1dc TT |
3413 | dwz = dwarf2_get_dwz_file (); |
3414 | if (dwz != NULL) | |
2ec9a5e0 | 3415 | { |
2ec9a5e0 TT |
3416 | struct mapped_index dwz_map; |
3417 | const gdb_byte *dwz_types_ignore; | |
3418 | offset_type dwz_types_elements_ignore; | |
3419 | ||
3420 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3421 | 1, | |
3422 | &dwz->gdb_index, &dwz_map, | |
3423 | &dwz_list, &dwz_list_elements, | |
3424 | &dwz_types_ignore, | |
3425 | &dwz_types_elements_ignore)) | |
3426 | { | |
3427 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3428 | bfd_get_filename (dwz->dwz_bfd)); | |
3429 | return 0; | |
3430 | } | |
3431 | } | |
3432 | ||
74a0d9f6 JK |
3433 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3434 | dwz_list_elements); | |
1fd400ff | 3435 | |
8b70b953 TT |
3436 | if (types_list_elements) |
3437 | { | |
3438 | struct dwarf2_section_info *section; | |
3439 | ||
3440 | /* We can only handle a single .debug_types when we have an | |
3441 | index. */ | |
3442 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3443 | return 0; | |
3444 | ||
3445 | section = VEC_index (dwarf2_section_info_def, | |
3446 | dwarf2_per_objfile->types, 0); | |
3447 | ||
74a0d9f6 JK |
3448 | create_signatured_type_table_from_index (objfile, section, types_list, |
3449 | types_list_elements); | |
8b70b953 | 3450 | } |
9291a0cd | 3451 | |
2ec9a5e0 TT |
3452 | create_addrmap_from_index (objfile, &local_map); |
3453 | ||
8d749320 | 3454 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3455 | *map = local_map; |
9291a0cd TT |
3456 | |
3457 | dwarf2_per_objfile->index_table = map; | |
3458 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3459 | dwarf2_per_objfile->quick_file_names_table = |
3460 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3461 | |
3462 | return 1; | |
3463 | } | |
3464 | ||
3465 | /* A helper for the "quick" functions which sets the global | |
3466 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3467 | |
9291a0cd TT |
3468 | static void |
3469 | dw2_setup (struct objfile *objfile) | |
3470 | { | |
9a3c8263 SM |
3471 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3472 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3473 | gdb_assert (dwarf2_per_objfile); |
3474 | } | |
3475 | ||
dee91e82 | 3476 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3477 | |
dee91e82 DE |
3478 | static void |
3479 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3480 | const gdb_byte *info_ptr, |
dee91e82 DE |
3481 | struct die_info *comp_unit_die, |
3482 | int has_children, | |
3483 | void *data) | |
9291a0cd | 3484 | { |
dee91e82 DE |
3485 | struct dwarf2_cu *cu = reader->cu; |
3486 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3487 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3488 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3489 | struct attribute *attr; |
dee91e82 | 3490 | int i; |
7b9f3c50 DE |
3491 | void **slot; |
3492 | struct quick_file_names *qfn; | |
9291a0cd | 3493 | |
0186c6a7 DE |
3494 | gdb_assert (! this_cu->is_debug_types); |
3495 | ||
07261596 TT |
3496 | /* Our callers never want to match partial units -- instead they |
3497 | will match the enclosing full CU. */ | |
3498 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3499 | { | |
3500 | this_cu->v.quick->no_file_data = 1; | |
3501 | return; | |
3502 | } | |
3503 | ||
0186c6a7 | 3504 | lh_cu = this_cu; |
7b9f3c50 | 3505 | slot = NULL; |
dee91e82 | 3506 | |
fff8551c | 3507 | line_header_up lh; |
9c541725 | 3508 | sect_offset line_offset {}; |
fff8551c | 3509 | |
dee91e82 | 3510 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3511 | if (attr) |
3512 | { | |
7b9f3c50 DE |
3513 | struct quick_file_names find_entry; |
3514 | ||
9c541725 | 3515 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3516 | |
3517 | /* We may have already read in this line header (TU line header sharing). | |
3518 | If we have we're done. */ | |
094b34ac | 3519 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3520 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3521 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3522 | &find_entry, INSERT); | |
3523 | if (*slot != NULL) | |
3524 | { | |
9a3c8263 | 3525 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3526 | return; |
7b9f3c50 DE |
3527 | } |
3528 | ||
3019eac3 | 3529 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3530 | } |
3531 | if (lh == NULL) | |
3532 | { | |
094b34ac | 3533 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3534 | return; |
9291a0cd TT |
3535 | } |
3536 | ||
8d749320 | 3537 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3538 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3539 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3540 | gdb_assert (slot != NULL); |
3541 | *slot = qfn; | |
9291a0cd | 3542 | |
d721ba37 | 3543 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3544 | |
fff8551c | 3545 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3546 | qfn->file_names = |
fff8551c PA |
3547 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3548 | for (i = 0; i < lh->file_names.size (); ++i) | |
3549 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3550 | qfn->real_names = NULL; |
9291a0cd | 3551 | |
094b34ac | 3552 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3553 | } |
3554 | ||
3555 | /* A helper for the "quick" functions which attempts to read the line | |
3556 | table for THIS_CU. */ | |
3557 | ||
3558 | static struct quick_file_names * | |
e4a48d9d | 3559 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3560 | { |
0186c6a7 DE |
3561 | /* This should never be called for TUs. */ |
3562 | gdb_assert (! this_cu->is_debug_types); | |
3563 | /* Nor type unit groups. */ | |
3564 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3565 | |
dee91e82 DE |
3566 | if (this_cu->v.quick->file_names != NULL) |
3567 | return this_cu->v.quick->file_names; | |
3568 | /* If we know there is no line data, no point in looking again. */ | |
3569 | if (this_cu->v.quick->no_file_data) | |
3570 | return NULL; | |
3571 | ||
0186c6a7 | 3572 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3573 | |
3574 | if (this_cu->v.quick->no_file_data) | |
3575 | return NULL; | |
3576 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3577 | } |
3578 | ||
3579 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3580 | real path for a given file name from the line table. */ |
2fdf6df6 | 3581 | |
9291a0cd | 3582 | static const char * |
7b9f3c50 DE |
3583 | dw2_get_real_path (struct objfile *objfile, |
3584 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3585 | { |
7b9f3c50 DE |
3586 | if (qfn->real_names == NULL) |
3587 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3588 | qfn->num_file_names, const char *); |
9291a0cd | 3589 | |
7b9f3c50 | 3590 | if (qfn->real_names[index] == NULL) |
14278e1f | 3591 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3592 | |
7b9f3c50 | 3593 | return qfn->real_names[index]; |
9291a0cd TT |
3594 | } |
3595 | ||
3596 | static struct symtab * | |
3597 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3598 | { | |
43f3e411 | 3599 | struct compunit_symtab *cust; |
9291a0cd | 3600 | int index; |
ae2de4f8 | 3601 | |
9291a0cd TT |
3602 | dw2_setup (objfile); |
3603 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3604 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3605 | if (cust == NULL) | |
3606 | return NULL; | |
3607 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3608 | } |
3609 | ||
7b9f3c50 DE |
3610 | /* Traversal function for dw2_forget_cached_source_info. */ |
3611 | ||
3612 | static int | |
3613 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3614 | { |
7b9f3c50 | 3615 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3616 | |
7b9f3c50 | 3617 | if (file_data->real_names) |
9291a0cd | 3618 | { |
7b9f3c50 | 3619 | int i; |
9291a0cd | 3620 | |
7b9f3c50 | 3621 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3622 | { |
7b9f3c50 DE |
3623 | xfree ((void*) file_data->real_names[i]); |
3624 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3625 | } |
3626 | } | |
7b9f3c50 DE |
3627 | |
3628 | return 1; | |
3629 | } | |
3630 | ||
3631 | static void | |
3632 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3633 | { | |
3634 | dw2_setup (objfile); | |
3635 | ||
3636 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3637 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3638 | } |
3639 | ||
f8eba3c6 TT |
3640 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3641 | the symtabs and calls the iterator. */ | |
3642 | ||
3643 | static int | |
3644 | dw2_map_expand_apply (struct objfile *objfile, | |
3645 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3646 | const char *name, const char *real_path, |
14bc53a8 | 3647 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3648 | { |
43f3e411 | 3649 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3650 | |
3651 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3652 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3653 | return 0; |
3654 | ||
3655 | /* This may expand more than one symtab, and we want to iterate over | |
3656 | all of them. */ | |
a0f42c21 | 3657 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3658 | |
14bc53a8 PA |
3659 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3660 | last_made, callback); | |
f8eba3c6 TT |
3661 | } |
3662 | ||
3663 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3664 | ||
14bc53a8 PA |
3665 | static bool |
3666 | dw2_map_symtabs_matching_filename | |
3667 | (struct objfile *objfile, const char *name, const char *real_path, | |
3668 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3669 | { |
3670 | int i; | |
c011a4f4 | 3671 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3672 | |
3673 | dw2_setup (objfile); | |
ae2de4f8 | 3674 | |
848e3e78 DE |
3675 | /* The rule is CUs specify all the files, including those used by |
3676 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3677 | |
848e3e78 | 3678 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3679 | { |
3680 | int j; | |
8832e7e3 | 3681 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3682 | struct quick_file_names *file_data; |
9291a0cd | 3683 | |
3d7bb9d9 | 3684 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3685 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3686 | continue; |
3687 | ||
e4a48d9d | 3688 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3689 | if (file_data == NULL) |
9291a0cd TT |
3690 | continue; |
3691 | ||
7b9f3c50 | 3692 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3693 | { |
7b9f3c50 | 3694 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3695 | const char *this_real_name; |
9291a0cd | 3696 | |
af529f8f | 3697 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3698 | { |
f5b95b50 | 3699 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3700 | callback)) |
3701 | return true; | |
288e77a7 | 3702 | continue; |
4aac40c8 | 3703 | } |
9291a0cd | 3704 | |
c011a4f4 DE |
3705 | /* Before we invoke realpath, which can get expensive when many |
3706 | files are involved, do a quick comparison of the basenames. */ | |
3707 | if (! basenames_may_differ | |
3708 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3709 | continue; | |
3710 | ||
da235a7c JK |
3711 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3712 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3713 | { |
da235a7c | 3714 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3715 | callback)) |
3716 | return true; | |
288e77a7 | 3717 | continue; |
da235a7c | 3718 | } |
9291a0cd | 3719 | |
da235a7c JK |
3720 | if (real_path != NULL) |
3721 | { | |
af529f8f JK |
3722 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3723 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3724 | if (this_real_name != NULL |
af529f8f | 3725 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3726 | { |
f5b95b50 | 3727 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3728 | callback)) |
3729 | return true; | |
288e77a7 | 3730 | continue; |
9291a0cd TT |
3731 | } |
3732 | } | |
3733 | } | |
3734 | } | |
3735 | ||
14bc53a8 | 3736 | return false; |
9291a0cd TT |
3737 | } |
3738 | ||
da51c347 DE |
3739 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3740 | ||
3741 | struct dw2_symtab_iterator | |
9291a0cd | 3742 | { |
da51c347 DE |
3743 | /* The internalized form of .gdb_index. */ |
3744 | struct mapped_index *index; | |
3745 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3746 | int want_specific_block; | |
3747 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3748 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3749 | int block_index; | |
3750 | /* The kind of symbol we're looking for. */ | |
3751 | domain_enum domain; | |
3752 | /* The list of CUs from the index entry of the symbol, | |
3753 | or NULL if not found. */ | |
3754 | offset_type *vec; | |
3755 | /* The next element in VEC to look at. */ | |
3756 | int next; | |
3757 | /* The number of elements in VEC, or zero if there is no match. */ | |
3758 | int length; | |
8943b874 DE |
3759 | /* Have we seen a global version of the symbol? |
3760 | If so we can ignore all further global instances. | |
3761 | This is to work around gold/15646, inefficient gold-generated | |
3762 | indices. */ | |
3763 | int global_seen; | |
da51c347 | 3764 | }; |
9291a0cd | 3765 | |
da51c347 DE |
3766 | /* Initialize the index symtab iterator ITER. |
3767 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3768 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3769 | |
9291a0cd | 3770 | static void |
da51c347 DE |
3771 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3772 | struct mapped_index *index, | |
3773 | int want_specific_block, | |
3774 | int block_index, | |
3775 | domain_enum domain, | |
3776 | const char *name) | |
3777 | { | |
3778 | iter->index = index; | |
3779 | iter->want_specific_block = want_specific_block; | |
3780 | iter->block_index = block_index; | |
3781 | iter->domain = domain; | |
3782 | iter->next = 0; | |
8943b874 | 3783 | iter->global_seen = 0; |
da51c347 DE |
3784 | |
3785 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3786 | iter->length = MAYBE_SWAP (*iter->vec); | |
3787 | else | |
3788 | { | |
3789 | iter->vec = NULL; | |
3790 | iter->length = 0; | |
3791 | } | |
3792 | } | |
3793 | ||
3794 | /* Return the next matching CU or NULL if there are no more. */ | |
3795 | ||
3796 | static struct dwarf2_per_cu_data * | |
3797 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3798 | { | |
3799 | for ( ; iter->next < iter->length; ++iter->next) | |
3800 | { | |
3801 | offset_type cu_index_and_attrs = | |
3802 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3803 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3804 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3805 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3806 | /* This value is only valid for index versions >= 7. */ | |
3807 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3808 | gdb_index_symbol_kind symbol_kind = | |
3809 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3810 | /* Only check the symbol attributes if they're present. | |
3811 | Indices prior to version 7 don't record them, | |
3812 | and indices >= 7 may elide them for certain symbols | |
3813 | (gold does this). */ | |
3814 | int attrs_valid = | |
3815 | (iter->index->version >= 7 | |
3816 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3817 | ||
3190f0c6 DE |
3818 | /* Don't crash on bad data. */ |
3819 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3820 | + dwarf2_per_objfile->n_type_units)) | |
3821 | { | |
3822 | complaint (&symfile_complaints, | |
3823 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3824 | " [in module %s]"), |
3825 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3826 | continue; |
3827 | } | |
3828 | ||
8832e7e3 | 3829 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3830 | |
da51c347 | 3831 | /* Skip if already read in. */ |
43f3e411 | 3832 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3833 | continue; |
3834 | ||
8943b874 DE |
3835 | /* Check static vs global. */ |
3836 | if (attrs_valid) | |
3837 | { | |
3838 | if (iter->want_specific_block | |
3839 | && want_static != is_static) | |
3840 | continue; | |
3841 | /* Work around gold/15646. */ | |
3842 | if (!is_static && iter->global_seen) | |
3843 | continue; | |
3844 | if (!is_static) | |
3845 | iter->global_seen = 1; | |
3846 | } | |
da51c347 DE |
3847 | |
3848 | /* Only check the symbol's kind if it has one. */ | |
3849 | if (attrs_valid) | |
3850 | { | |
3851 | switch (iter->domain) | |
3852 | { | |
3853 | case VAR_DOMAIN: | |
3854 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3855 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3856 | /* Some types are also in VAR_DOMAIN. */ | |
3857 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3858 | continue; | |
3859 | break; | |
3860 | case STRUCT_DOMAIN: | |
3861 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3862 | continue; | |
3863 | break; | |
3864 | case LABEL_DOMAIN: | |
3865 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3866 | continue; | |
3867 | break; | |
3868 | default: | |
3869 | break; | |
3870 | } | |
3871 | } | |
3872 | ||
3873 | ++iter->next; | |
3874 | return per_cu; | |
3875 | } | |
3876 | ||
3877 | return NULL; | |
3878 | } | |
3879 | ||
43f3e411 | 3880 | static struct compunit_symtab * |
da51c347 DE |
3881 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3882 | const char *name, domain_enum domain) | |
9291a0cd | 3883 | { |
43f3e411 | 3884 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3885 | struct mapped_index *index; |
3886 | ||
9291a0cd TT |
3887 | dw2_setup (objfile); |
3888 | ||
156942c7 DE |
3889 | index = dwarf2_per_objfile->index_table; |
3890 | ||
da51c347 | 3891 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3892 | if (index) |
9291a0cd | 3893 | { |
da51c347 DE |
3894 | struct dw2_symtab_iterator iter; |
3895 | struct dwarf2_per_cu_data *per_cu; | |
3896 | ||
3897 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3898 | |
da51c347 | 3899 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3900 | { |
b2e2f908 | 3901 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3902 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3903 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3904 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3905 | |
b2e2f908 DE |
3906 | sym = block_find_symbol (block, name, domain, |
3907 | block_find_non_opaque_type_preferred, | |
3908 | &with_opaque); | |
3909 | ||
da51c347 DE |
3910 | /* Some caution must be observed with overloaded functions |
3911 | and methods, since the index will not contain any overload | |
3912 | information (but NAME might contain it). */ | |
da51c347 | 3913 | |
b2e2f908 | 3914 | if (sym != NULL |
a778f165 | 3915 | && SYMBOL_MATCHES_SEARCH_NAME (sym, name)) |
b2e2f908 DE |
3916 | return stab; |
3917 | if (with_opaque != NULL | |
a778f165 | 3918 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, name)) |
b2e2f908 | 3919 | stab_best = stab; |
da51c347 DE |
3920 | |
3921 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3922 | } |
3923 | } | |
9291a0cd | 3924 | |
da51c347 | 3925 | return stab_best; |
9291a0cd TT |
3926 | } |
3927 | ||
3928 | static void | |
3929 | dw2_print_stats (struct objfile *objfile) | |
3930 | { | |
e4a48d9d | 3931 | int i, total, count; |
9291a0cd TT |
3932 | |
3933 | dw2_setup (objfile); | |
e4a48d9d | 3934 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3935 | count = 0; |
e4a48d9d | 3936 | for (i = 0; i < total; ++i) |
9291a0cd | 3937 | { |
8832e7e3 | 3938 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3939 | |
43f3e411 | 3940 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3941 | ++count; |
3942 | } | |
e4a48d9d | 3943 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3944 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3945 | } | |
3946 | ||
779bd270 DE |
3947 | /* This dumps minimal information about the index. |
3948 | It is called via "mt print objfiles". | |
3949 | One use is to verify .gdb_index has been loaded by the | |
3950 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3951 | ||
9291a0cd TT |
3952 | static void |
3953 | dw2_dump (struct objfile *objfile) | |
3954 | { | |
779bd270 DE |
3955 | dw2_setup (objfile); |
3956 | gdb_assert (dwarf2_per_objfile->using_index); | |
3957 | printf_filtered (".gdb_index:"); | |
3958 | if (dwarf2_per_objfile->index_table != NULL) | |
3959 | { | |
3960 | printf_filtered (" version %d\n", | |
3961 | dwarf2_per_objfile->index_table->version); | |
3962 | } | |
3963 | else | |
3964 | printf_filtered (" faked for \"readnow\"\n"); | |
3965 | printf_filtered ("\n"); | |
9291a0cd TT |
3966 | } |
3967 | ||
3968 | static void | |
3189cb12 DE |
3969 | dw2_relocate (struct objfile *objfile, |
3970 | const struct section_offsets *new_offsets, | |
3971 | const struct section_offsets *delta) | |
9291a0cd TT |
3972 | { |
3973 | /* There's nothing to relocate here. */ | |
3974 | } | |
3975 | ||
3976 | static void | |
3977 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3978 | const char *func_name) | |
3979 | { | |
da51c347 DE |
3980 | struct mapped_index *index; |
3981 | ||
3982 | dw2_setup (objfile); | |
3983 | ||
3984 | index = dwarf2_per_objfile->index_table; | |
3985 | ||
3986 | /* index is NULL if OBJF_READNOW. */ | |
3987 | if (index) | |
3988 | { | |
3989 | struct dw2_symtab_iterator iter; | |
3990 | struct dwarf2_per_cu_data *per_cu; | |
3991 | ||
3992 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3993 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3994 | func_name); | |
3995 | ||
3996 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3997 | dw2_instantiate_symtab (per_cu); | |
3998 | } | |
9291a0cd TT |
3999 | } |
4000 | ||
4001 | static void | |
4002 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4003 | { | |
4004 | int i; | |
4005 | ||
4006 | dw2_setup (objfile); | |
1fd400ff TT |
4007 | |
4008 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4009 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4010 | { |
8832e7e3 | 4011 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4012 | |
a0f42c21 | 4013 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4014 | } |
4015 | } | |
4016 | ||
4017 | static void | |
652a8996 JK |
4018 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4019 | const char *fullname) | |
9291a0cd TT |
4020 | { |
4021 | int i; | |
4022 | ||
4023 | dw2_setup (objfile); | |
d4637a04 DE |
4024 | |
4025 | /* We don't need to consider type units here. | |
4026 | This is only called for examining code, e.g. expand_line_sal. | |
4027 | There can be an order of magnitude (or more) more type units | |
4028 | than comp units, and we avoid them if we can. */ | |
4029 | ||
4030 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4031 | { |
4032 | int j; | |
8832e7e3 | 4033 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4034 | struct quick_file_names *file_data; |
9291a0cd | 4035 | |
3d7bb9d9 | 4036 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4037 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4038 | continue; |
4039 | ||
e4a48d9d | 4040 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4041 | if (file_data == NULL) |
9291a0cd TT |
4042 | continue; |
4043 | ||
7b9f3c50 | 4044 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4045 | { |
652a8996 JK |
4046 | const char *this_fullname = file_data->file_names[j]; |
4047 | ||
4048 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4049 | { |
a0f42c21 | 4050 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4051 | break; |
4052 | } | |
4053 | } | |
4054 | } | |
4055 | } | |
4056 | ||
9291a0cd | 4057 | static void |
ade7ed9e | 4058 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4059 | const char * name, domain_enum domain, |
ade7ed9e | 4060 | int global, |
40658b94 PH |
4061 | int (*callback) (struct block *, |
4062 | struct symbol *, void *), | |
2edb89d3 JK |
4063 | void *data, symbol_compare_ftype *match, |
4064 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 4065 | { |
40658b94 | 4066 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4067 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4068 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4069 | } |
4070 | ||
4071 | static void | |
f8eba3c6 TT |
4072 | dw2_expand_symtabs_matching |
4073 | (struct objfile *objfile, | |
14bc53a8 PA |
4074 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4075 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4076 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4077 | enum search_domain kind) | |
9291a0cd TT |
4078 | { |
4079 | int i; | |
4080 | offset_type iter; | |
4b5246aa | 4081 | struct mapped_index *index; |
9291a0cd TT |
4082 | |
4083 | dw2_setup (objfile); | |
ae2de4f8 DE |
4084 | |
4085 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
4086 | if (!dwarf2_per_objfile->index_table) |
4087 | return; | |
4b5246aa | 4088 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 4089 | |
7b08b9eb | 4090 | if (file_matcher != NULL) |
24c79950 | 4091 | { |
fc4007c9 TT |
4092 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
4093 | htab_eq_pointer, | |
4094 | NULL, xcalloc, xfree)); | |
4095 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4096 | htab_eq_pointer, | |
4097 | NULL, xcalloc, xfree)); | |
24c79950 | 4098 | |
848e3e78 DE |
4099 | /* The rule is CUs specify all the files, including those used by |
4100 | any TU, so there's no need to scan TUs here. */ | |
4101 | ||
4102 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
4103 | { |
4104 | int j; | |
8832e7e3 | 4105 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
4106 | struct quick_file_names *file_data; |
4107 | void **slot; | |
7b08b9eb | 4108 | |
61d96d7e DE |
4109 | QUIT; |
4110 | ||
24c79950 | 4111 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 4112 | |
24c79950 | 4113 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4114 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 4115 | continue; |
7b08b9eb | 4116 | |
e4a48d9d | 4117 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
4118 | if (file_data == NULL) |
4119 | continue; | |
7b08b9eb | 4120 | |
fc4007c9 | 4121 | if (htab_find (visited_not_found.get (), file_data) != NULL) |
24c79950 | 4122 | continue; |
fc4007c9 | 4123 | else if (htab_find (visited_found.get (), file_data) != NULL) |
24c79950 TT |
4124 | { |
4125 | per_cu->v.quick->mark = 1; | |
4126 | continue; | |
4127 | } | |
4128 | ||
4129 | for (j = 0; j < file_data->num_file_names; ++j) | |
4130 | { | |
da235a7c JK |
4131 | const char *this_real_name; |
4132 | ||
14bc53a8 | 4133 | if (file_matcher (file_data->file_names[j], false)) |
24c79950 TT |
4134 | { |
4135 | per_cu->v.quick->mark = 1; | |
4136 | break; | |
4137 | } | |
da235a7c JK |
4138 | |
4139 | /* Before we invoke realpath, which can get expensive when many | |
4140 | files are involved, do a quick comparison of the basenames. */ | |
4141 | if (!basenames_may_differ | |
4142 | && !file_matcher (lbasename (file_data->file_names[j]), | |
14bc53a8 | 4143 | true)) |
da235a7c JK |
4144 | continue; |
4145 | ||
4146 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
14bc53a8 | 4147 | if (file_matcher (this_real_name, false)) |
da235a7c JK |
4148 | { |
4149 | per_cu->v.quick->mark = 1; | |
4150 | break; | |
4151 | } | |
24c79950 TT |
4152 | } |
4153 | ||
4154 | slot = htab_find_slot (per_cu->v.quick->mark | |
fc4007c9 TT |
4155 | ? visited_found.get () |
4156 | : visited_not_found.get (), | |
24c79950 TT |
4157 | file_data, INSERT); |
4158 | *slot = file_data; | |
4159 | } | |
24c79950 | 4160 | } |
9291a0cd | 4161 | |
3876f04e | 4162 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
4163 | { |
4164 | offset_type idx = 2 * iter; | |
4165 | const char *name; | |
4166 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 4167 | int global_seen = 0; |
9291a0cd | 4168 | |
61d96d7e DE |
4169 | QUIT; |
4170 | ||
3876f04e | 4171 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
4172 | continue; |
4173 | ||
3876f04e | 4174 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 4175 | |
14bc53a8 | 4176 | if (!symbol_matcher (name)) |
9291a0cd TT |
4177 | continue; |
4178 | ||
4179 | /* The name was matched, now expand corresponding CUs that were | |
4180 | marked. */ | |
4b5246aa | 4181 | vec = (offset_type *) (index->constant_pool |
3876f04e | 4182 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
4183 | vec_len = MAYBE_SWAP (vec[0]); |
4184 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4185 | { | |
e254ef6a | 4186 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 4187 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
4188 | /* This value is only valid for index versions >= 7. */ |
4189 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
4190 | gdb_index_symbol_kind symbol_kind = |
4191 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4192 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
4193 | /* Only check the symbol attributes if they're present. |
4194 | Indices prior to version 7 don't record them, | |
4195 | and indices >= 7 may elide them for certain symbols | |
4196 | (gold does this). */ | |
4197 | int attrs_valid = | |
4198 | (index->version >= 7 | |
4199 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4200 | ||
8943b874 DE |
4201 | /* Work around gold/15646. */ |
4202 | if (attrs_valid) | |
4203 | { | |
4204 | if (!is_static && global_seen) | |
4205 | continue; | |
4206 | if (!is_static) | |
4207 | global_seen = 1; | |
4208 | } | |
4209 | ||
3190f0c6 DE |
4210 | /* Only check the symbol's kind if it has one. */ |
4211 | if (attrs_valid) | |
156942c7 DE |
4212 | { |
4213 | switch (kind) | |
4214 | { | |
4215 | case VARIABLES_DOMAIN: | |
4216 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4217 | continue; | |
4218 | break; | |
4219 | case FUNCTIONS_DOMAIN: | |
4220 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4221 | continue; | |
4222 | break; | |
4223 | case TYPES_DOMAIN: | |
4224 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4225 | continue; | |
4226 | break; | |
4227 | default: | |
4228 | break; | |
4229 | } | |
4230 | } | |
4231 | ||
3190f0c6 DE |
4232 | /* Don't crash on bad data. */ |
4233 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4234 | + dwarf2_per_objfile->n_type_units)) | |
4235 | { | |
4236 | complaint (&symfile_complaints, | |
4237 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4238 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4239 | continue; |
4240 | } | |
4241 | ||
8832e7e3 | 4242 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4243 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4244 | { |
4245 | int symtab_was_null = | |
4246 | (per_cu->v.quick->compunit_symtab == NULL); | |
4247 | ||
4248 | dw2_instantiate_symtab (per_cu); | |
4249 | ||
4250 | if (expansion_notify != NULL | |
4251 | && symtab_was_null | |
4252 | && per_cu->v.quick->compunit_symtab != NULL) | |
4253 | { | |
14bc53a8 | 4254 | expansion_notify (per_cu->v.quick->compunit_symtab); |
276d885b GB |
4255 | } |
4256 | } | |
9291a0cd TT |
4257 | } |
4258 | } | |
4259 | } | |
4260 | ||
43f3e411 | 4261 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4262 | symtab. */ |
4263 | ||
43f3e411 DE |
4264 | static struct compunit_symtab * |
4265 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4266 | CORE_ADDR pc) | |
9703b513 TT |
4267 | { |
4268 | int i; | |
4269 | ||
43f3e411 DE |
4270 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4271 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4272 | return cust; | |
9703b513 | 4273 | |
43f3e411 | 4274 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4275 | return NULL; |
4276 | ||
43f3e411 | 4277 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4278 | { |
43f3e411 | 4279 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4280 | |
43f3e411 | 4281 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4282 | if (s != NULL) |
4283 | return s; | |
4284 | } | |
4285 | ||
4286 | return NULL; | |
4287 | } | |
4288 | ||
43f3e411 DE |
4289 | static struct compunit_symtab * |
4290 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4291 | struct bound_minimal_symbol msymbol, | |
4292 | CORE_ADDR pc, | |
4293 | struct obj_section *section, | |
4294 | int warn_if_readin) | |
9291a0cd TT |
4295 | { |
4296 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4297 | struct compunit_symtab *result; |
9291a0cd TT |
4298 | |
4299 | dw2_setup (objfile); | |
4300 | ||
4301 | if (!objfile->psymtabs_addrmap) | |
4302 | return NULL; | |
4303 | ||
9a3c8263 SM |
4304 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4305 | pc); | |
9291a0cd TT |
4306 | if (!data) |
4307 | return NULL; | |
4308 | ||
43f3e411 | 4309 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4310 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4311 | paddress (get_objfile_arch (objfile), pc)); |
4312 | ||
43f3e411 DE |
4313 | result |
4314 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4315 | pc); | |
9703b513 TT |
4316 | gdb_assert (result != NULL); |
4317 | return result; | |
9291a0cd TT |
4318 | } |
4319 | ||
9291a0cd | 4320 | static void |
44b13c5a | 4321 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4322 | void *data, int need_fullname) |
9291a0cd | 4323 | { |
9291a0cd | 4324 | dw2_setup (objfile); |
ae2de4f8 | 4325 | |
bbf2f4df | 4326 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 4327 | { |
bbf2f4df | 4328 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 4329 | |
bbf2f4df PA |
4330 | htab_up visited (htab_create_alloc (10, |
4331 | htab_hash_pointer, htab_eq_pointer, | |
4332 | NULL, xcalloc, xfree)); | |
24c79950 | 4333 | |
bbf2f4df PA |
4334 | /* The rule is CUs specify all the files, including those used |
4335 | by any TU, so there's no need to scan TUs here. We can | |
4336 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 4337 | |
bbf2f4df PA |
4338 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
4339 | { | |
4340 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 4341 | |
bbf2f4df PA |
4342 | if (per_cu->v.quick->compunit_symtab) |
4343 | { | |
4344 | void **slot = htab_find_slot (visited.get (), | |
4345 | per_cu->v.quick->file_names, | |
4346 | INSERT); | |
9291a0cd | 4347 | |
bbf2f4df PA |
4348 | *slot = per_cu->v.quick->file_names; |
4349 | } | |
24c79950 | 4350 | } |
24c79950 | 4351 | |
bbf2f4df | 4352 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 4353 | { |
bbf2f4df PA |
4354 | int j; |
4355 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4356 | struct quick_file_names *file_data; | |
4357 | void **slot; | |
4358 | ||
4359 | /* We only need to look at symtabs not already expanded. */ | |
4360 | if (per_cu->v.quick->compunit_symtab) | |
4361 | continue; | |
74e2f255 | 4362 | |
bbf2f4df PA |
4363 | file_data = dw2_get_file_names (per_cu); |
4364 | if (file_data == NULL) | |
4365 | continue; | |
4366 | ||
4367 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
4368 | if (*slot) | |
4369 | { | |
4370 | /* Already visited. */ | |
4371 | continue; | |
4372 | } | |
4373 | *slot = file_data; | |
4374 | ||
4375 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4376 | { | |
4377 | const char *filename = file_data->file_names[j]; | |
4378 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4379 | } | |
9291a0cd TT |
4380 | } |
4381 | } | |
bbf2f4df PA |
4382 | |
4383 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4384 | { | |
14278e1f | 4385 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
4386 | |
4387 | if (need_fullname) | |
4388 | this_real_name = gdb_realpath (filename); | |
14278e1f | 4389 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 4390 | }); |
9291a0cd TT |
4391 | } |
4392 | ||
4393 | static int | |
4394 | dw2_has_symbols (struct objfile *objfile) | |
4395 | { | |
4396 | return 1; | |
4397 | } | |
4398 | ||
4399 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4400 | { | |
4401 | dw2_has_symbols, | |
4402 | dw2_find_last_source_symtab, | |
4403 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4404 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4405 | dw2_lookup_symbol, |
9291a0cd TT |
4406 | dw2_print_stats, |
4407 | dw2_dump, | |
4408 | dw2_relocate, | |
4409 | dw2_expand_symtabs_for_function, | |
4410 | dw2_expand_all_symtabs, | |
652a8996 | 4411 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4412 | dw2_map_matching_symbols, |
9291a0cd | 4413 | dw2_expand_symtabs_matching, |
43f3e411 | 4414 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4415 | dw2_map_symbol_filenames |
4416 | }; | |
4417 | ||
4418 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4419 | file will use psymtabs, or 1 if using the GNU index. */ | |
4420 | ||
4421 | int | |
4422 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4423 | { | |
4424 | /* If we're about to read full symbols, don't bother with the | |
4425 | indices. In this case we also don't care if some other debug | |
4426 | format is making psymtabs, because they are all about to be | |
4427 | expanded anyway. */ | |
4428 | if ((objfile->flags & OBJF_READNOW)) | |
4429 | { | |
4430 | int i; | |
4431 | ||
4432 | dwarf2_per_objfile->using_index = 1; | |
4433 | create_all_comp_units (objfile); | |
0e50663e | 4434 | create_all_type_units (objfile); |
7b9f3c50 DE |
4435 | dwarf2_per_objfile->quick_file_names_table = |
4436 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4437 | |
1fd400ff | 4438 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4439 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4440 | { |
8832e7e3 | 4441 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4442 | |
e254ef6a DE |
4443 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4444 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4445 | } |
4446 | ||
4447 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4448 | these functions will be no-ops because we will have expanded | |
4449 | all symtabs. */ | |
4450 | return 1; | |
4451 | } | |
4452 | ||
4453 | if (dwarf2_read_index (objfile)) | |
4454 | return 1; | |
4455 | ||
9291a0cd TT |
4456 | return 0; |
4457 | } | |
4458 | ||
4459 | \f | |
4460 | ||
dce234bc PP |
4461 | /* Build a partial symbol table. */ |
4462 | ||
4463 | void | |
f29dff0a | 4464 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4465 | { |
c9bf0622 | 4466 | |
f29dff0a | 4467 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4468 | { |
4469 | init_psymbol_list (objfile, 1024); | |
4470 | } | |
4471 | ||
492d29ea | 4472 | TRY |
c9bf0622 TT |
4473 | { |
4474 | /* This isn't really ideal: all the data we allocate on the | |
4475 | objfile's obstack is still uselessly kept around. However, | |
4476 | freeing it seems unsafe. */ | |
906768f9 | 4477 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 4478 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 4479 | psymtabs.keep (); |
c9bf0622 | 4480 | } |
492d29ea PA |
4481 | CATCH (except, RETURN_MASK_ERROR) |
4482 | { | |
4483 | exception_print (gdb_stderr, except); | |
4484 | } | |
4485 | END_CATCH | |
c906108c | 4486 | } |
c906108c | 4487 | |
1ce1cefd DE |
4488 | /* Return the total length of the CU described by HEADER. */ |
4489 | ||
4490 | static unsigned int | |
4491 | get_cu_length (const struct comp_unit_head *header) | |
4492 | { | |
4493 | return header->initial_length_size + header->length; | |
4494 | } | |
4495 | ||
9c541725 | 4496 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 4497 | |
9c541725 PA |
4498 | static inline bool |
4499 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 4500 | { |
9c541725 PA |
4501 | sect_offset bottom = cu_header->sect_off; |
4502 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 4503 | |
9c541725 | 4504 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
4505 | } |
4506 | ||
3b80fe9b DE |
4507 | /* Find the base address of the compilation unit for range lists and |
4508 | location lists. It will normally be specified by DW_AT_low_pc. | |
4509 | In DWARF-3 draft 4, the base address could be overridden by | |
4510 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4511 | compilation units with discontinuous ranges. */ | |
4512 | ||
4513 | static void | |
4514 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4515 | { | |
4516 | struct attribute *attr; | |
4517 | ||
4518 | cu->base_known = 0; | |
4519 | cu->base_address = 0; | |
4520 | ||
4521 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4522 | if (attr) | |
4523 | { | |
31aa7e4e | 4524 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4525 | cu->base_known = 1; |
4526 | } | |
4527 | else | |
4528 | { | |
4529 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4530 | if (attr) | |
4531 | { | |
31aa7e4e | 4532 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4533 | cu->base_known = 1; |
4534 | } | |
4535 | } | |
4536 | } | |
4537 | ||
93311388 | 4538 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 4539 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
4540 | NOTE: This leaves members offset, first_die_offset to be filled in |
4541 | by the caller. */ | |
107d2387 | 4542 | |
d521ce57 | 4543 | static const gdb_byte * |
107d2387 | 4544 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
4545 | const gdb_byte *info_ptr, |
4546 | struct dwarf2_section_info *section, | |
4547 | rcuh_kind section_kind) | |
107d2387 AC |
4548 | { |
4549 | int signed_addr; | |
891d2f0b | 4550 | unsigned int bytes_read; |
43988095 JK |
4551 | const char *filename = get_section_file_name (section); |
4552 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
4553 | |
4554 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4555 | cu_header->initial_length_size = bytes_read; | |
4556 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4557 | info_ptr += bytes_read; |
107d2387 AC |
4558 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4559 | info_ptr += 2; | |
43988095 JK |
4560 | if (cu_header->version < 5) |
4561 | switch (section_kind) | |
4562 | { | |
4563 | case rcuh_kind::COMPILE: | |
4564 | cu_header->unit_type = DW_UT_compile; | |
4565 | break; | |
4566 | case rcuh_kind::TYPE: | |
4567 | cu_header->unit_type = DW_UT_type; | |
4568 | break; | |
4569 | default: | |
4570 | internal_error (__FILE__, __LINE__, | |
4571 | _("read_comp_unit_head: invalid section_kind")); | |
4572 | } | |
4573 | else | |
4574 | { | |
4575 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
4576 | (read_1_byte (abfd, info_ptr)); | |
4577 | info_ptr += 1; | |
4578 | switch (cu_header->unit_type) | |
4579 | { | |
4580 | case DW_UT_compile: | |
4581 | if (section_kind != rcuh_kind::COMPILE) | |
4582 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4583 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
4584 | filename); | |
4585 | break; | |
4586 | case DW_UT_type: | |
4587 | section_kind = rcuh_kind::TYPE; | |
4588 | break; | |
4589 | default: | |
4590 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4591 | "(is %d, should be %d or %d) [in module %s]"), | |
4592 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
4593 | } | |
4594 | ||
4595 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4596 | info_ptr += 1; | |
4597 | } | |
9c541725 PA |
4598 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
4599 | cu_header, | |
4600 | &bytes_read); | |
613e1657 | 4601 | info_ptr += bytes_read; |
43988095 JK |
4602 | if (cu_header->version < 5) |
4603 | { | |
4604 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4605 | info_ptr += 1; | |
4606 | } | |
107d2387 AC |
4607 | signed_addr = bfd_get_sign_extend_vma (abfd); |
4608 | if (signed_addr < 0) | |
8e65ff28 | 4609 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4610 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4611 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4612 | |
43988095 JK |
4613 | if (section_kind == rcuh_kind::TYPE) |
4614 | { | |
4615 | LONGEST type_offset; | |
4616 | ||
4617 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
4618 | info_ptr += 8; | |
4619 | ||
4620 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
4621 | info_ptr += bytes_read; | |
9c541725 PA |
4622 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
4623 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
4624 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
4625 | "header (is %s) [in module %s]"), plongest (type_offset), | |
4626 | filename); | |
4627 | } | |
4628 | ||
107d2387 AC |
4629 | return info_ptr; |
4630 | } | |
4631 | ||
36586728 TT |
4632 | /* Helper function that returns the proper abbrev section for |
4633 | THIS_CU. */ | |
4634 | ||
4635 | static struct dwarf2_section_info * | |
4636 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4637 | { | |
4638 | struct dwarf2_section_info *abbrev; | |
4639 | ||
4640 | if (this_cu->is_dwz) | |
4641 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4642 | else | |
4643 | abbrev = &dwarf2_per_objfile->abbrev; | |
4644 | ||
4645 | return abbrev; | |
4646 | } | |
4647 | ||
9ff913ba DE |
4648 | /* Subroutine of read_and_check_comp_unit_head and |
4649 | read_and_check_type_unit_head to simplify them. | |
4650 | Perform various error checking on the header. */ | |
4651 | ||
4652 | static void | |
4653 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4654 | struct dwarf2_section_info *section, |
4655 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4656 | { |
a32a8923 | 4657 | const char *filename = get_section_file_name (section); |
9ff913ba | 4658 | |
43988095 | 4659 | if (header->version < 2 || header->version > 5) |
9ff913ba | 4660 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 4661 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
4662 | filename); |
4663 | ||
9c541725 | 4664 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 4665 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
4666 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
4667 | "(offset 0x%x + 6) [in module %s]"), | |
4668 | to_underlying (header->abbrev_sect_off), | |
4669 | to_underlying (header->sect_off), | |
9ff913ba DE |
4670 | filename); |
4671 | ||
9c541725 | 4672 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 4673 | avoid potential 32-bit overflow. */ |
9c541725 | 4674 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 4675 | > section->size) |
9c541725 PA |
4676 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
4677 | "(offset 0x%x + 0) [in module %s]"), | |
4678 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
4679 | filename); |
4680 | } | |
4681 | ||
4682 | /* Read in a CU/TU header and perform some basic error checking. | |
4683 | The contents of the header are stored in HEADER. | |
4684 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4685 | |
d521ce57 | 4686 | static const gdb_byte * |
9ff913ba DE |
4687 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4688 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4689 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4690 | const gdb_byte *info_ptr, |
43988095 | 4691 | rcuh_kind section_kind) |
72bf9492 | 4692 | { |
d521ce57 | 4693 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4694 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4695 | |
9c541725 | 4696 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 4697 | |
43988095 | 4698 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 4699 | |
9c541725 | 4700 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 4701 | |
4bdcc0c1 | 4702 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4703 | |
4704 | return info_ptr; | |
348e048f DE |
4705 | } |
4706 | ||
f4dc4d17 DE |
4707 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4708 | ||
4709 | static sect_offset | |
4710 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 4711 | sect_offset sect_off) |
f4dc4d17 | 4712 | { |
a32a8923 | 4713 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4714 | const gdb_byte *info_ptr; |
ac298888 | 4715 | unsigned int initial_length_size, offset_size; |
43988095 | 4716 | uint16_t version; |
f4dc4d17 DE |
4717 | |
4718 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 4719 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 4720 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 4721 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
4722 | info_ptr += initial_length_size; |
4723 | ||
4724 | version = read_2_bytes (abfd, info_ptr); | |
4725 | info_ptr += 2; | |
4726 | if (version >= 5) | |
4727 | { | |
4728 | /* Skip unit type and address size. */ | |
4729 | info_ptr += 2; | |
4730 | } | |
4731 | ||
9c541725 | 4732 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
4733 | } |
4734 | ||
aaa75496 JB |
4735 | /* Allocate a new partial symtab for file named NAME and mark this new |
4736 | partial symtab as being an include of PST. */ | |
4737 | ||
4738 | static void | |
d521ce57 | 4739 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4740 | struct objfile *objfile) |
4741 | { | |
4742 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4743 | ||
fbd9ab74 JK |
4744 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4745 | { | |
4746 | /* It shares objfile->objfile_obstack. */ | |
4747 | subpst->dirname = pst->dirname; | |
4748 | } | |
4749 | ||
aaa75496 JB |
4750 | subpst->textlow = 0; |
4751 | subpst->texthigh = 0; | |
4752 | ||
8d749320 SM |
4753 | subpst->dependencies |
4754 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4755 | subpst->dependencies[0] = pst; |
4756 | subpst->number_of_dependencies = 1; | |
4757 | ||
4758 | subpst->globals_offset = 0; | |
4759 | subpst->n_global_syms = 0; | |
4760 | subpst->statics_offset = 0; | |
4761 | subpst->n_static_syms = 0; | |
43f3e411 | 4762 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4763 | subpst->read_symtab = pst->read_symtab; |
4764 | subpst->readin = 0; | |
4765 | ||
4766 | /* No private part is necessary for include psymtabs. This property | |
4767 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4768 | the regular ones. */ |
58a9656e | 4769 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4770 | } |
4771 | ||
4772 | /* Read the Line Number Program data and extract the list of files | |
4773 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4774 | partial symtab for each of these included files. */ |
aaa75496 JB |
4775 | |
4776 | static void | |
4777 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4778 | struct die_info *die, |
4779 | struct partial_symtab *pst) | |
aaa75496 | 4780 | { |
fff8551c | 4781 | line_header_up lh; |
d85a05f0 | 4782 | struct attribute *attr; |
aaa75496 | 4783 | |
d85a05f0 DJ |
4784 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4785 | if (attr) | |
9c541725 | 4786 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
4787 | if (lh == NULL) |
4788 | return; /* No linetable, so no includes. */ | |
4789 | ||
c6da4cef | 4790 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 4791 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4792 | } |
4793 | ||
348e048f | 4794 | static hashval_t |
52dc124a | 4795 | hash_signatured_type (const void *item) |
348e048f | 4796 | { |
9a3c8263 SM |
4797 | const struct signatured_type *sig_type |
4798 | = (const struct signatured_type *) item; | |
9a619af0 | 4799 | |
348e048f | 4800 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4801 | return sig_type->signature; |
348e048f DE |
4802 | } |
4803 | ||
4804 | static int | |
52dc124a | 4805 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4806 | { |
9a3c8263 SM |
4807 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4808 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4809 | |
348e048f DE |
4810 | return lhs->signature == rhs->signature; |
4811 | } | |
4812 | ||
1fd400ff TT |
4813 | /* Allocate a hash table for signatured types. */ |
4814 | ||
4815 | static htab_t | |
673bfd45 | 4816 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4817 | { |
4818 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4819 | hash_signatured_type, |
4820 | eq_signatured_type, | |
1fd400ff TT |
4821 | NULL, |
4822 | &objfile->objfile_obstack, | |
4823 | hashtab_obstack_allocate, | |
4824 | dummy_obstack_deallocate); | |
4825 | } | |
4826 | ||
d467dd73 | 4827 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4828 | |
4829 | static int | |
d467dd73 | 4830 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4831 | { |
9a3c8263 SM |
4832 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4833 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4834 | |
b4dd5633 | 4835 | **datap = sigt; |
1fd400ff TT |
4836 | ++*datap; |
4837 | ||
4838 | return 1; | |
4839 | } | |
4840 | ||
78d4d2c5 | 4841 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
4842 | and fill them into TYPES_HTAB. It will process only type units, |
4843 | therefore DW_UT_type. */ | |
c88ee1f0 | 4844 | |
78d4d2c5 JK |
4845 | static void |
4846 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
4847 | dwarf2_section_info *section, htab_t &types_htab, |
4848 | rcuh_kind section_kind) | |
348e048f | 4849 | { |
3019eac3 | 4850 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 4851 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
4852 | bfd *abfd; |
4853 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 4854 | |
4bdcc0c1 DE |
4855 | abbrev_section = (dwo_file != NULL |
4856 | ? &dwo_file->sections.abbrev | |
4857 | : &dwarf2_per_objfile->abbrev); | |
4858 | ||
b4f54984 | 4859 | if (dwarf_read_debug) |
43988095 JK |
4860 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
4861 | get_section_name (section), | |
a32a8923 | 4862 | get_section_file_name (abbrev_section)); |
09406207 | 4863 | |
78d4d2c5 JK |
4864 | dwarf2_read_section (objfile, section); |
4865 | info_ptr = section->buffer; | |
348e048f | 4866 | |
78d4d2c5 JK |
4867 | if (info_ptr == NULL) |
4868 | return; | |
348e048f | 4869 | |
78d4d2c5 JK |
4870 | /* We can't set abfd until now because the section may be empty or |
4871 | not present, in which case the bfd is unknown. */ | |
4872 | abfd = get_section_bfd_owner (section); | |
348e048f | 4873 | |
78d4d2c5 JK |
4874 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4875 | because we don't need to read any dies: the signature is in the | |
4876 | header. */ | |
3019eac3 | 4877 | |
78d4d2c5 JK |
4878 | end_ptr = info_ptr + section->size; |
4879 | while (info_ptr < end_ptr) | |
4880 | { | |
78d4d2c5 JK |
4881 | struct signatured_type *sig_type; |
4882 | struct dwo_unit *dwo_tu; | |
4883 | void **slot; | |
4884 | const gdb_byte *ptr = info_ptr; | |
4885 | struct comp_unit_head header; | |
4886 | unsigned int length; | |
8b70b953 | 4887 | |
9c541725 | 4888 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 4889 | |
a49dd8dd JK |
4890 | /* Initialize it due to a false compiler warning. */ |
4891 | header.signature = -1; | |
9c541725 | 4892 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 4893 | |
78d4d2c5 JK |
4894 | /* We need to read the type's signature in order to build the hash |
4895 | table, but we don't need anything else just yet. */ | |
348e048f | 4896 | |
43988095 JK |
4897 | ptr = read_and_check_comp_unit_head (&header, section, |
4898 | abbrev_section, ptr, section_kind); | |
348e048f | 4899 | |
78d4d2c5 | 4900 | length = get_cu_length (&header); |
6caca83c | 4901 | |
78d4d2c5 JK |
4902 | /* Skip dummy type units. */ |
4903 | if (ptr >= info_ptr + length | |
43988095 JK |
4904 | || peek_abbrev_code (abfd, ptr) == 0 |
4905 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
4906 | { |
4907 | info_ptr += length; | |
4908 | continue; | |
4909 | } | |
dee91e82 | 4910 | |
78d4d2c5 JK |
4911 | if (types_htab == NULL) |
4912 | { | |
4913 | if (dwo_file) | |
4914 | types_htab = allocate_dwo_unit_table (objfile); | |
4915 | else | |
4916 | types_htab = allocate_signatured_type_table (objfile); | |
4917 | } | |
8b70b953 | 4918 | |
78d4d2c5 JK |
4919 | if (dwo_file) |
4920 | { | |
4921 | sig_type = NULL; | |
4922 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4923 | struct dwo_unit); | |
4924 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 4925 | dwo_tu->signature = header.signature; |
9c541725 | 4926 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 4927 | dwo_tu->section = section; |
9c541725 | 4928 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
4929 | dwo_tu->length = length; |
4930 | } | |
4931 | else | |
4932 | { | |
4933 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4934 | The real type_offset is in the DWO file. */ | |
4935 | dwo_tu = NULL; | |
4936 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4937 | struct signatured_type); | |
43988095 | 4938 | sig_type->signature = header.signature; |
9c541725 | 4939 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
4940 | sig_type->per_cu.objfile = objfile; |
4941 | sig_type->per_cu.is_debug_types = 1; | |
4942 | sig_type->per_cu.section = section; | |
9c541725 | 4943 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
4944 | sig_type->per_cu.length = length; |
4945 | } | |
4946 | ||
4947 | slot = htab_find_slot (types_htab, | |
4948 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4949 | INSERT); | |
4950 | gdb_assert (slot != NULL); | |
4951 | if (*slot != NULL) | |
4952 | { | |
9c541725 | 4953 | sect_offset dup_sect_off; |
0349ea22 | 4954 | |
3019eac3 DE |
4955 | if (dwo_file) |
4956 | { | |
78d4d2c5 JK |
4957 | const struct dwo_unit *dup_tu |
4958 | = (const struct dwo_unit *) *slot; | |
4959 | ||
9c541725 | 4960 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
4961 | } |
4962 | else | |
4963 | { | |
78d4d2c5 JK |
4964 | const struct signatured_type *dup_tu |
4965 | = (const struct signatured_type *) *slot; | |
4966 | ||
9c541725 | 4967 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 4968 | } |
8b70b953 | 4969 | |
78d4d2c5 JK |
4970 | complaint (&symfile_complaints, |
4971 | _("debug type entry at offset 0x%x is duplicate to" | |
4972 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 4973 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 4974 | hex_string (header.signature)); |
78d4d2c5 JK |
4975 | } |
4976 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 4977 | |
78d4d2c5 JK |
4978 | if (dwarf_read_debug > 1) |
4979 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 4980 | to_underlying (sect_off), |
43988095 | 4981 | hex_string (header.signature)); |
3019eac3 | 4982 | |
78d4d2c5 JK |
4983 | info_ptr += length; |
4984 | } | |
4985 | } | |
3019eac3 | 4986 | |
78d4d2c5 JK |
4987 | /* Create the hash table of all entries in the .debug_types |
4988 | (or .debug_types.dwo) section(s). | |
4989 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4990 | otherwise it is NULL. | |
b3c8eb43 | 4991 | |
78d4d2c5 | 4992 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 4993 | |
78d4d2c5 | 4994 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 4995 | |
78d4d2c5 JK |
4996 | static void |
4997 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4998 | VEC (dwarf2_section_info_def) *types, | |
4999 | htab_t &types_htab) | |
5000 | { | |
5001 | int ix; | |
5002 | struct dwarf2_section_info *section; | |
5003 | ||
5004 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5005 | return; | |
348e048f | 5006 | |
78d4d2c5 JK |
5007 | for (ix = 0; |
5008 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5009 | ++ix) | |
43988095 JK |
5010 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5011 | rcuh_kind::TYPE); | |
3019eac3 DE |
5012 | } |
5013 | ||
5014 | /* Create the hash table of all entries in the .debug_types section, | |
5015 | and initialize all_type_units. | |
5016 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5017 | otherwise non-zero. */ | |
5018 | ||
5019 | static int | |
5020 | create_all_type_units (struct objfile *objfile) | |
5021 | { | |
78d4d2c5 | 5022 | htab_t types_htab = NULL; |
b4dd5633 | 5023 | struct signatured_type **iter; |
3019eac3 | 5024 | |
43988095 JK |
5025 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5026 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5027 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5028 | if (types_htab == NULL) |
5029 | { | |
5030 | dwarf2_per_objfile->signatured_types = NULL; | |
5031 | return 0; | |
5032 | } | |
5033 | ||
348e048f DE |
5034 | dwarf2_per_objfile->signatured_types = types_htab; |
5035 | ||
6aa5f3a6 DE |
5036 | dwarf2_per_objfile->n_type_units |
5037 | = dwarf2_per_objfile->n_allocated_type_units | |
5038 | = htab_elements (types_htab); | |
8d749320 SM |
5039 | dwarf2_per_objfile->all_type_units = |
5040 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5041 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5042 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5043 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5044 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5045 | |
348e048f DE |
5046 | return 1; |
5047 | } | |
5048 | ||
6aa5f3a6 DE |
5049 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5050 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5051 | Otherwise we find one. */ | |
5052 | ||
5053 | static struct signatured_type * | |
5054 | add_type_unit (ULONGEST sig, void **slot) | |
5055 | { | |
5056 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5057 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5058 | struct signatured_type *sig_type; | |
5059 | ||
5060 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5061 | ++n_type_units; | |
5062 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5063 | { | |
5064 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5065 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5066 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5067 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5068 | = XRESIZEVEC (struct signatured_type *, |
5069 | dwarf2_per_objfile->all_type_units, | |
5070 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5071 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5072 | } | |
5073 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5074 | ||
5075 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5076 | struct signatured_type); | |
5077 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5078 | sig_type->signature = sig; | |
5079 | sig_type->per_cu.is_debug_types = 1; | |
5080 | if (dwarf2_per_objfile->using_index) | |
5081 | { | |
5082 | sig_type->per_cu.v.quick = | |
5083 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5084 | struct dwarf2_per_cu_quick_data); | |
5085 | } | |
5086 | ||
5087 | if (slot == NULL) | |
5088 | { | |
5089 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5090 | sig_type, INSERT); | |
5091 | } | |
5092 | gdb_assert (*slot == NULL); | |
5093 | *slot = sig_type; | |
5094 | /* The rest of sig_type must be filled in by the caller. */ | |
5095 | return sig_type; | |
5096 | } | |
5097 | ||
a2ce51a0 DE |
5098 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5099 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5100 | ||
5101 | static void | |
5102 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5103 | struct signatured_type *sig_entry, | |
5104 | struct dwo_unit *dwo_entry) | |
5105 | { | |
7ee85ab1 | 5106 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5107 | gdb_assert (! sig_entry->per_cu.queued); |
5108 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5109 | if (dwarf2_per_objfile->using_index) |
5110 | { | |
5111 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5112 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5113 | } |
5114 | else | |
5115 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5116 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5117 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5118 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5119 | gdb_assert (sig_entry->dwo_unit == NULL); |
5120 | ||
5121 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5122 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5123 | sig_entry->per_cu.length = dwo_entry->length; |
5124 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5125 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5126 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5127 | sig_entry->dwo_unit = dwo_entry; | |
5128 | } | |
5129 | ||
5130 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5131 | If we haven't read the TU yet, create the signatured_type data structure |
5132 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5133 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5134 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5135 | containing that CU. Otherwise we could end up reading several other DWO | |
5136 | files (due to comdat folding) to process the transitive closure of all the | |
5137 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5138 | type signature that it needs. | |
a2ce51a0 DE |
5139 | We only do this for .gdb_index because in the psymtab case we already have |
5140 | to read all the DWOs to build the type unit groups. */ | |
5141 | ||
5142 | static struct signatured_type * | |
5143 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5144 | { | |
5145 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5146 | struct dwo_file *dwo_file; | |
5147 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5148 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5149 | void **slot; |
a2ce51a0 DE |
5150 | |
5151 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5152 | ||
6aa5f3a6 DE |
5153 | /* If TU skeletons have been removed then we may not have read in any |
5154 | TUs yet. */ | |
5155 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5156 | { | |
5157 | dwarf2_per_objfile->signatured_types | |
5158 | = allocate_signatured_type_table (objfile); | |
5159 | } | |
a2ce51a0 DE |
5160 | |
5161 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5162 | Use the global signatured_types array to do our own comdat-folding |
5163 | of types. If this is the first time we're reading this TU, and | |
5164 | the TU has an entry in .gdb_index, replace the recorded data from | |
5165 | .gdb_index with this TU. */ | |
a2ce51a0 | 5166 | |
a2ce51a0 | 5167 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5168 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5169 | &find_sig_entry, INSERT); | |
9a3c8263 | 5170 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5171 | |
5172 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5173 | read. Don't reassign the global entry to point to this DWO if that's |
5174 | the case. Also note that if the TU is already being read, it may not | |
5175 | have come from a DWO, the program may be a mix of Fission-compiled | |
5176 | code and non-Fission-compiled code. */ | |
5177 | ||
5178 | /* Have we already tried to read this TU? | |
5179 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5180 | needn't exist in the global table yet). */ | |
5181 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5182 | return sig_entry; |
5183 | ||
6aa5f3a6 DE |
5184 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5185 | dwo_unit of the TU itself. */ | |
5186 | dwo_file = cu->dwo_unit->dwo_file; | |
5187 | ||
a2ce51a0 DE |
5188 | /* Ok, this is the first time we're reading this TU. */ |
5189 | if (dwo_file->tus == NULL) | |
5190 | return NULL; | |
5191 | find_dwo_entry.signature = sig; | |
9a3c8263 | 5192 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
5193 | if (dwo_entry == NULL) |
5194 | return NULL; | |
5195 | ||
6aa5f3a6 DE |
5196 | /* If the global table doesn't have an entry for this TU, add one. */ |
5197 | if (sig_entry == NULL) | |
5198 | sig_entry = add_type_unit (sig, slot); | |
5199 | ||
a2ce51a0 | 5200 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 5201 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
5202 | return sig_entry; |
5203 | } | |
5204 | ||
a2ce51a0 DE |
5205 | /* Subroutine of lookup_signatured_type. |
5206 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
5207 | then try the DWP file. If the TU stub (skeleton) has been removed then |
5208 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
5209 | |
5210 | static struct signatured_type * | |
5211 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5212 | { | |
5213 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5214 | struct dwp_file *dwp_file = get_dwp_file (); | |
5215 | struct dwo_unit *dwo_entry; | |
5216 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5217 | void **slot; |
a2ce51a0 DE |
5218 | |
5219 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5220 | gdb_assert (dwp_file != NULL); | |
5221 | ||
6aa5f3a6 DE |
5222 | /* If TU skeletons have been removed then we may not have read in any |
5223 | TUs yet. */ | |
5224 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 5225 | { |
6aa5f3a6 DE |
5226 | dwarf2_per_objfile->signatured_types |
5227 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
5228 | } |
5229 | ||
6aa5f3a6 DE |
5230 | find_sig_entry.signature = sig; |
5231 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5232 | &find_sig_entry, INSERT); | |
9a3c8263 | 5233 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5234 | |
5235 | /* Have we already tried to read this TU? | |
5236 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5237 | needn't exist in the global table yet). */ | |
5238 | if (sig_entry != NULL) | |
5239 | return sig_entry; | |
5240 | ||
a2ce51a0 DE |
5241 | if (dwp_file->tus == NULL) |
5242 | return NULL; | |
57d63ce2 DE |
5243 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5244 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5245 | if (dwo_entry == NULL) |
5246 | return NULL; | |
5247 | ||
6aa5f3a6 | 5248 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5249 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5250 | ||
a2ce51a0 DE |
5251 | return sig_entry; |
5252 | } | |
5253 | ||
380bca97 | 5254 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5255 | Returns NULL if signature SIG is not present in the table. |
5256 | It is up to the caller to complain about this. */ | |
348e048f DE |
5257 | |
5258 | static struct signatured_type * | |
a2ce51a0 | 5259 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5260 | { |
a2ce51a0 DE |
5261 | if (cu->dwo_unit |
5262 | && dwarf2_per_objfile->using_index) | |
5263 | { | |
5264 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5265 | These cases require special processing. */ | |
5266 | if (get_dwp_file () == NULL) | |
5267 | return lookup_dwo_signatured_type (cu, sig); | |
5268 | else | |
5269 | return lookup_dwp_signatured_type (cu, sig); | |
5270 | } | |
5271 | else | |
5272 | { | |
5273 | struct signatured_type find_entry, *entry; | |
348e048f | 5274 | |
a2ce51a0 DE |
5275 | if (dwarf2_per_objfile->signatured_types == NULL) |
5276 | return NULL; | |
5277 | find_entry.signature = sig; | |
9a3c8263 SM |
5278 | entry = ((struct signatured_type *) |
5279 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5280 | return entry; |
5281 | } | |
348e048f | 5282 | } |
42e7ad6c DE |
5283 | \f |
5284 | /* Low level DIE reading support. */ | |
348e048f | 5285 | |
d85a05f0 DJ |
5286 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5287 | ||
5288 | static void | |
5289 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5290 | struct dwarf2_cu *cu, |
3019eac3 DE |
5291 | struct dwarf2_section_info *section, |
5292 | struct dwo_file *dwo_file) | |
d85a05f0 | 5293 | { |
fceca515 | 5294 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5295 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5296 | reader->cu = cu; |
3019eac3 | 5297 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5298 | reader->die_section = section; |
5299 | reader->buffer = section->buffer; | |
f664829e | 5300 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5301 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5302 | } |
5303 | ||
b0c7bfa9 DE |
5304 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5305 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5306 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5307 | already. | |
5308 | ||
5309 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5310 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5311 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5312 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5313 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5314 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5315 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5316 | are filled in with the info of the DIE from the DWO file. | |
5317 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5318 | provided an abbrev table to use. | |
5319 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5320 | ||
5321 | static int | |
5322 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5323 | struct dwo_unit *dwo_unit, | |
5324 | int abbrev_table_provided, | |
5325 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5326 | const char *stub_comp_dir, |
b0c7bfa9 | 5327 | struct die_reader_specs *result_reader, |
d521ce57 | 5328 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5329 | struct die_info **result_comp_unit_die, |
5330 | int *result_has_children) | |
5331 | { | |
5332 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5333 | struct dwarf2_cu *cu = this_cu->cu; | |
5334 | struct dwarf2_section_info *section; | |
5335 | bfd *abfd; | |
d521ce57 | 5336 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5337 | ULONGEST signature; /* Or dwo_id. */ |
5338 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5339 | int i,num_extra_attrs; | |
5340 | struct dwarf2_section_info *dwo_abbrev_section; | |
5341 | struct attribute *attr; | |
5342 | struct die_info *comp_unit_die; | |
5343 | ||
b0aeadb3 DE |
5344 | /* At most one of these may be provided. */ |
5345 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5346 | |
b0c7bfa9 DE |
5347 | /* These attributes aren't processed until later: |
5348 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5349 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5350 | referenced later. However, these attributes are found in the stub | |
5351 | which we won't have later. In order to not impose this complication | |
5352 | on the rest of the code, we read them here and copy them to the | |
5353 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5354 | |
5355 | stmt_list = NULL; | |
5356 | low_pc = NULL; | |
5357 | high_pc = NULL; | |
5358 | ranges = NULL; | |
5359 | comp_dir = NULL; | |
5360 | ||
5361 | if (stub_comp_unit_die != NULL) | |
5362 | { | |
5363 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5364 | DWO file. */ | |
5365 | if (! this_cu->is_debug_types) | |
5366 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5367 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5368 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5369 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5370 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5371 | ||
5372 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5373 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5374 | cu->addr_base = 0; | |
5375 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5376 | if (attr) | |
5377 | cu->addr_base = DW_UNSND (attr); | |
5378 | ||
5379 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5380 | We need the value before we can process DW_AT_ranges. */ | |
5381 | cu->ranges_base = 0; | |
5382 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5383 | if (attr) | |
5384 | cu->ranges_base = DW_UNSND (attr); | |
5385 | } | |
a2ce51a0 DE |
5386 | else if (stub_comp_dir != NULL) |
5387 | { | |
5388 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5389 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5390 | comp_dir->name = DW_AT_comp_dir; |
5391 | comp_dir->form = DW_FORM_string; | |
5392 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5393 | DW_STRING (comp_dir) = stub_comp_dir; | |
5394 | } | |
b0c7bfa9 DE |
5395 | |
5396 | /* Set up for reading the DWO CU/TU. */ | |
5397 | cu->dwo_unit = dwo_unit; | |
5398 | section = dwo_unit->section; | |
5399 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5400 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
5401 | begin_info_ptr = info_ptr = (section->buffer |
5402 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
5403 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
5404 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5405 | ||
5406 | if (this_cu->is_debug_types) | |
5407 | { | |
b0c7bfa9 DE |
5408 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
5409 | ||
43988095 | 5410 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 5411 | dwo_abbrev_section, |
43988095 | 5412 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 5413 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 5414 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
5415 | { |
5416 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5417 | " TU at offset 0x%x [in module %s]"), | |
5418 | hex_string (sig_type->signature), | |
43988095 | 5419 | hex_string (cu->header.signature), |
9c541725 | 5420 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
5421 | bfd_get_filename (abfd)); |
5422 | } | |
9c541725 | 5423 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5424 | /* For DWOs coming from DWP files, we don't know the CU length |
5425 | nor the type's offset in the TU until now. */ | |
5426 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 5427 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
5428 | |
5429 | /* Establish the type offset that can be used to lookup the type. | |
5430 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
5431 | sig_type->type_offset_in_section |
5432 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
5433 | } |
5434 | else | |
5435 | { | |
5436 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5437 | dwo_abbrev_section, | |
43988095 | 5438 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 5439 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5440 | /* For DWOs coming from DWP files, we don't know the CU length |
5441 | until now. */ | |
5442 | dwo_unit->length = get_cu_length (&cu->header); | |
5443 | } | |
5444 | ||
02142a6c DE |
5445 | /* Replace the CU's original abbrev table with the DWO's. |
5446 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5447 | if (abbrev_table_provided) |
5448 | { | |
5449 | /* Don't free the provided abbrev table, the caller of | |
5450 | init_cutu_and_read_dies owns it. */ | |
5451 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5452 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5453 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5454 | } | |
5455 | else | |
5456 | { | |
5457 | dwarf2_free_abbrev_table (cu); | |
5458 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5459 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5460 | } |
5461 | ||
5462 | /* Read in the die, but leave space to copy over the attributes | |
5463 | from the stub. This has the benefit of simplifying the rest of | |
5464 | the code - all the work to maintain the illusion of a single | |
5465 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5466 | num_extra_attrs = ((stmt_list != NULL) | |
5467 | + (low_pc != NULL) | |
5468 | + (high_pc != NULL) | |
5469 | + (ranges != NULL) | |
5470 | + (comp_dir != NULL)); | |
5471 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5472 | result_has_children, num_extra_attrs); | |
5473 | ||
5474 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5475 | comp_unit_die = *result_comp_unit_die; | |
5476 | i = comp_unit_die->num_attrs; | |
5477 | if (stmt_list != NULL) | |
5478 | comp_unit_die->attrs[i++] = *stmt_list; | |
5479 | if (low_pc != NULL) | |
5480 | comp_unit_die->attrs[i++] = *low_pc; | |
5481 | if (high_pc != NULL) | |
5482 | comp_unit_die->attrs[i++] = *high_pc; | |
5483 | if (ranges != NULL) | |
5484 | comp_unit_die->attrs[i++] = *ranges; | |
5485 | if (comp_dir != NULL) | |
5486 | comp_unit_die->attrs[i++] = *comp_dir; | |
5487 | comp_unit_die->num_attrs += num_extra_attrs; | |
5488 | ||
b4f54984 | 5489 | if (dwarf_die_debug) |
bf6af496 DE |
5490 | { |
5491 | fprintf_unfiltered (gdb_stdlog, | |
5492 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5493 | get_section_name (section), |
bf6af496 DE |
5494 | (unsigned) (begin_info_ptr - section->buffer), |
5495 | bfd_get_filename (abfd)); | |
b4f54984 | 5496 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5497 | } |
5498 | ||
a2ce51a0 DE |
5499 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5500 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5501 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5502 | to get it via circuitous means. Blech. */ | |
5503 | if (comp_dir != NULL) | |
5504 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5505 | ||
b0c7bfa9 DE |
5506 | /* Skip dummy compilation units. */ |
5507 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5508 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5509 | return 0; | |
5510 | ||
5511 | *result_info_ptr = info_ptr; | |
5512 | return 1; | |
5513 | } | |
5514 | ||
5515 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5516 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5517 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5518 | |
5519 | static struct dwo_unit * | |
5520 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5521 | struct die_info *comp_unit_die) | |
5522 | { | |
5523 | struct dwarf2_cu *cu = this_cu->cu; | |
5524 | struct attribute *attr; | |
5525 | ULONGEST signature; | |
5526 | struct dwo_unit *dwo_unit; | |
5527 | const char *comp_dir, *dwo_name; | |
5528 | ||
a2ce51a0 DE |
5529 | gdb_assert (cu != NULL); |
5530 | ||
b0c7bfa9 | 5531 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5532 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5533 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5534 | |
5535 | if (this_cu->is_debug_types) | |
5536 | { | |
5537 | struct signatured_type *sig_type; | |
5538 | ||
5539 | /* Since this_cu is the first member of struct signatured_type, | |
5540 | we can go from a pointer to one to a pointer to the other. */ | |
5541 | sig_type = (struct signatured_type *) this_cu; | |
5542 | signature = sig_type->signature; | |
5543 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5544 | } | |
5545 | else | |
5546 | { | |
5547 | struct attribute *attr; | |
5548 | ||
5549 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5550 | if (! attr) | |
5551 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5552 | " [in module %s]"), | |
4262abfb | 5553 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5554 | signature = DW_UNSND (attr); |
5555 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5556 | signature); | |
5557 | } | |
5558 | ||
b0c7bfa9 DE |
5559 | return dwo_unit; |
5560 | } | |
5561 | ||
a2ce51a0 | 5562 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5563 | See it for a description of the parameters. |
5564 | Read a TU directly from a DWO file, bypassing the stub. | |
5565 | ||
5566 | Note: This function could be a little bit simpler if we shared cleanups | |
5567 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5568 | to do, so we keep this function self-contained. Or we could move this | |
5569 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5570 | |
5571 | static void | |
6aa5f3a6 DE |
5572 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5573 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5574 | die_reader_func_ftype *die_reader_func, |
5575 | void *data) | |
5576 | { | |
5577 | struct dwarf2_cu *cu; | |
5578 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5579 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5580 | struct die_reader_specs reader; |
5581 | const gdb_byte *info_ptr; | |
5582 | struct die_info *comp_unit_die; | |
5583 | int has_children; | |
5584 | ||
5585 | /* Verify we can do the following downcast, and that we have the | |
5586 | data we need. */ | |
5587 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5588 | sig_type = (struct signatured_type *) this_cu; | |
5589 | gdb_assert (sig_type->dwo_unit != NULL); | |
5590 | ||
5591 | cleanups = make_cleanup (null_cleanup, NULL); | |
5592 | ||
6aa5f3a6 DE |
5593 | if (use_existing_cu && this_cu->cu != NULL) |
5594 | { | |
5595 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5596 | cu = this_cu->cu; | |
5597 | /* There's no need to do the rereading_dwo_cu handling that | |
5598 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5599 | } | |
5600 | else | |
5601 | { | |
5602 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5603 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5604 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5605 | init_one_comp_unit (cu, this_cu); |
5606 | /* If an error occurs while loading, release our storage. */ | |
5607 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5608 | } | |
5609 | ||
5610 | /* A future optimization, if needed, would be to use an existing | |
5611 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5612 | could share abbrev tables. */ | |
a2ce51a0 DE |
5613 | |
5614 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5615 | 0 /* abbrev_table_provided */, | |
5616 | NULL /* stub_comp_unit_die */, | |
5617 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5618 | &reader, &info_ptr, | |
5619 | &comp_unit_die, &has_children) == 0) | |
5620 | { | |
5621 | /* Dummy die. */ | |
5622 | do_cleanups (cleanups); | |
5623 | return; | |
5624 | } | |
5625 | ||
5626 | /* All the "real" work is done here. */ | |
5627 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5628 | ||
6aa5f3a6 | 5629 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5630 | but the alternative is making the latter more complex. |
5631 | This function is only for the special case of using DWO files directly: | |
5632 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5633 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5634 | { |
6aa5f3a6 DE |
5635 | if (keep) |
5636 | { | |
5637 | /* We've successfully allocated this compilation unit. Let our | |
5638 | caller clean it up when finished with it. */ | |
5639 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5640 | |
6aa5f3a6 DE |
5641 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5642 | So we have to manually free the abbrev table. */ | |
5643 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5644 | |
6aa5f3a6 DE |
5645 | /* Link this CU into read_in_chain. */ |
5646 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5647 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5648 | } | |
5649 | else | |
5650 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5651 | } |
a2ce51a0 DE |
5652 | |
5653 | do_cleanups (cleanups); | |
5654 | } | |
5655 | ||
fd820528 | 5656 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5657 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5658 | |
f4dc4d17 DE |
5659 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5660 | Otherwise the table specified in the comp unit header is read in and used. | |
5661 | This is an optimization for when we already have the abbrev table. | |
5662 | ||
dee91e82 DE |
5663 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5664 | Otherwise, a new CU is allocated with xmalloc. | |
5665 | ||
5666 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5667 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5668 | ||
5669 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5670 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5671 | |
70221824 | 5672 | static void |
fd820528 | 5673 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5674 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5675 | int use_existing_cu, int keep, |
5676 | die_reader_func_ftype *die_reader_func, | |
5677 | void *data) | |
c906108c | 5678 | { |
dee91e82 | 5679 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5680 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5681 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5682 | struct dwarf2_cu *cu; |
d521ce57 | 5683 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5684 | struct die_reader_specs reader; |
d85a05f0 | 5685 | struct die_info *comp_unit_die; |
dee91e82 | 5686 | int has_children; |
d85a05f0 | 5687 | struct attribute *attr; |
365156ad | 5688 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5689 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5690 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5691 | /* Non-zero if CU currently points to a DWO file and we need to |
5692 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5693 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5694 | int rereading_dwo_cu = 0; |
c906108c | 5695 | |
b4f54984 | 5696 | if (dwarf_die_debug) |
09406207 DE |
5697 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5698 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5699 | to_underlying (this_cu->sect_off)); |
09406207 | 5700 | |
dee91e82 DE |
5701 | if (use_existing_cu) |
5702 | gdb_assert (keep); | |
23745b47 | 5703 | |
a2ce51a0 DE |
5704 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5705 | file (instead of going through the stub), short-circuit all of this. */ | |
5706 | if (this_cu->reading_dwo_directly) | |
5707 | { | |
5708 | /* Narrow down the scope of possibilities to have to understand. */ | |
5709 | gdb_assert (this_cu->is_debug_types); | |
5710 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5711 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5712 | die_reader_func, data); | |
a2ce51a0 DE |
5713 | return; |
5714 | } | |
5715 | ||
dee91e82 DE |
5716 | cleanups = make_cleanup (null_cleanup, NULL); |
5717 | ||
5718 | /* This is cheap if the section is already read in. */ | |
5719 | dwarf2_read_section (objfile, section); | |
5720 | ||
9c541725 | 5721 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
5722 | |
5723 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5724 | |
5725 | if (use_existing_cu && this_cu->cu != NULL) | |
5726 | { | |
5727 | cu = this_cu->cu; | |
42e7ad6c DE |
5728 | /* If this CU is from a DWO file we need to start over, we need to |
5729 | refetch the attributes from the skeleton CU. | |
5730 | This could be optimized by retrieving those attributes from when we | |
5731 | were here the first time: the previous comp_unit_die was stored in | |
5732 | comp_unit_obstack. But there's no data yet that we need this | |
5733 | optimization. */ | |
5734 | if (cu->dwo_unit != NULL) | |
5735 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5736 | } |
5737 | else | |
5738 | { | |
5739 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5740 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5741 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5742 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5743 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5744 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5745 | } |
dee91e82 | 5746 | |
b0c7bfa9 | 5747 | /* Get the header. */ |
9c541725 | 5748 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
5749 | { |
5750 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 5751 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
5752 | } |
5753 | else | |
5754 | { | |
3019eac3 | 5755 | if (this_cu->is_debug_types) |
dee91e82 | 5756 | { |
43988095 | 5757 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 5758 | abbrev_section, info_ptr, |
43988095 | 5759 | rcuh_kind::TYPE); |
dee91e82 | 5760 | |
42e7ad6c DE |
5761 | /* Since per_cu is the first member of struct signatured_type, |
5762 | we can go from a pointer to one to a pointer to the other. */ | |
5763 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 5764 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
5765 | gdb_assert (sig_type->type_offset_in_tu |
5766 | == cu->header.type_cu_offset_in_tu); | |
5767 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 5768 | |
42e7ad6c DE |
5769 | /* LENGTH has not been set yet for type units if we're |
5770 | using .gdb_index. */ | |
1ce1cefd | 5771 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5772 | |
5773 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
5774 | sig_type->type_offset_in_section = |
5775 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
5776 | |
5777 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
5778 | } |
5779 | else | |
5780 | { | |
4bdcc0c1 DE |
5781 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5782 | abbrev_section, | |
43988095 JK |
5783 | info_ptr, |
5784 | rcuh_kind::COMPILE); | |
dee91e82 | 5785 | |
9c541725 | 5786 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 5787 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 5788 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
5789 | } |
5790 | } | |
10b3939b | 5791 | |
6caca83c | 5792 | /* Skip dummy compilation units. */ |
dee91e82 | 5793 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5794 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5795 | { | |
dee91e82 | 5796 | do_cleanups (cleanups); |
21b2bd31 | 5797 | return; |
6caca83c CC |
5798 | } |
5799 | ||
433df2d4 DE |
5800 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5801 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5802 | done. Note that it's important that if the CU had an abbrev table |
5803 | on entry we don't free it when we're done: Somewhere up the call stack | |
5804 | it may be in use. */ | |
f4dc4d17 DE |
5805 | if (abbrev_table != NULL) |
5806 | { | |
5807 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 5808 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
5809 | cu->abbrev_table = abbrev_table; |
5810 | } | |
5811 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5812 | { |
4bdcc0c1 | 5813 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5814 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5815 | } | |
42e7ad6c DE |
5816 | else if (rereading_dwo_cu) |
5817 | { | |
5818 | dwarf2_free_abbrev_table (cu); | |
5819 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5820 | } | |
af703f96 | 5821 | |
dee91e82 | 5822 | /* Read the top level CU/TU die. */ |
3019eac3 | 5823 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5824 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5825 | |
b0c7bfa9 DE |
5826 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5827 | from the DWO file. | |
5828 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5829 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5830 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5831 | if (attr) | |
5832 | { | |
3019eac3 | 5833 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5834 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5835 | |
5836 | if (has_children) | |
6a506a2d DE |
5837 | { |
5838 | complaint (&symfile_complaints, | |
5839 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5840 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 5841 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 5842 | } |
b0c7bfa9 | 5843 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5844 | if (dwo_unit != NULL) |
3019eac3 | 5845 | { |
6a506a2d DE |
5846 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5847 | abbrev_table != NULL, | |
a2ce51a0 | 5848 | comp_unit_die, NULL, |
6a506a2d DE |
5849 | &reader, &info_ptr, |
5850 | &dwo_comp_unit_die, &has_children) == 0) | |
5851 | { | |
5852 | /* Dummy die. */ | |
5853 | do_cleanups (cleanups); | |
5854 | return; | |
5855 | } | |
5856 | comp_unit_die = dwo_comp_unit_die; | |
5857 | } | |
5858 | else | |
5859 | { | |
5860 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5861 | the stub. A complaint has already been logged. There's | |
5862 | not much more we can do except pass on the stub DIE to | |
5863 | die_reader_func. We don't want to throw an error on bad | |
5864 | debug info. */ | |
3019eac3 DE |
5865 | } |
5866 | } | |
5867 | ||
b0c7bfa9 | 5868 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5869 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5870 | ||
b0c7bfa9 | 5871 | /* Done, clean up. */ |
365156ad | 5872 | if (free_cu_cleanup != NULL) |
348e048f | 5873 | { |
365156ad TT |
5874 | if (keep) |
5875 | { | |
5876 | /* We've successfully allocated this compilation unit. Let our | |
5877 | caller clean it up when finished with it. */ | |
5878 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5879 | |
365156ad TT |
5880 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5881 | So we have to manually free the abbrev table. */ | |
5882 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5883 | |
365156ad TT |
5884 | /* Link this CU into read_in_chain. */ |
5885 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5886 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5887 | } | |
5888 | else | |
5889 | do_cleanups (free_cu_cleanup); | |
348e048f | 5890 | } |
365156ad TT |
5891 | |
5892 | do_cleanups (cleanups); | |
dee91e82 DE |
5893 | } |
5894 | ||
33e80786 DE |
5895 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5896 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5897 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5898 | |
5899 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5900 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5901 | |
5902 | We fill in THIS_CU->length. | |
5903 | ||
5904 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5905 | linker) then DIE_READER_FUNC will not get called. | |
5906 | ||
5907 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5908 | This is done in order to not leave THIS_CU->cu in a state where we have |
5909 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5910 | |
5911 | static void | |
5912 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5913 | struct dwo_file *dwo_file, |
dee91e82 DE |
5914 | die_reader_func_ftype *die_reader_func, |
5915 | void *data) | |
5916 | { | |
5917 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5918 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5919 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5920 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5921 | struct dwarf2_cu cu; |
d521ce57 | 5922 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5923 | struct die_reader_specs reader; |
5924 | struct cleanup *cleanups; | |
5925 | struct die_info *comp_unit_die; | |
5926 | int has_children; | |
5927 | ||
b4f54984 | 5928 | if (dwarf_die_debug) |
09406207 DE |
5929 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5930 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5931 | to_underlying (this_cu->sect_off)); |
09406207 | 5932 | |
dee91e82 DE |
5933 | gdb_assert (this_cu->cu == NULL); |
5934 | ||
33e80786 DE |
5935 | abbrev_section = (dwo_file != NULL |
5936 | ? &dwo_file->sections.abbrev | |
5937 | : get_abbrev_section_for_cu (this_cu)); | |
5938 | ||
dee91e82 DE |
5939 | /* This is cheap if the section is already read in. */ |
5940 | dwarf2_read_section (objfile, section); | |
5941 | ||
5942 | init_one_comp_unit (&cu, this_cu); | |
5943 | ||
5944 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5945 | ||
9c541725 | 5946 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
5947 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5948 | abbrev_section, info_ptr, | |
43988095 JK |
5949 | (this_cu->is_debug_types |
5950 | ? rcuh_kind::TYPE | |
5951 | : rcuh_kind::COMPILE)); | |
dee91e82 | 5952 | |
1ce1cefd | 5953 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5954 | |
5955 | /* Skip dummy compilation units. */ | |
5956 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5957 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5958 | { |
dee91e82 | 5959 | do_cleanups (cleanups); |
21b2bd31 | 5960 | return; |
93311388 | 5961 | } |
72bf9492 | 5962 | |
dee91e82 DE |
5963 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5964 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5965 | ||
3019eac3 | 5966 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5967 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5968 | ||
5969 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5970 | ||
5971 | do_cleanups (cleanups); | |
5972 | } | |
5973 | ||
3019eac3 DE |
5974 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5975 | does not lookup the specified DWO file. | |
5976 | This cannot be used to read DWO files. | |
dee91e82 DE |
5977 | |
5978 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5979 | This is done in order to not leave THIS_CU->cu in a state where we have |
5980 | to care whether it refers to the "main" CU or the DWO CU. | |
5981 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5982 | |
5983 | static void | |
5984 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5985 | die_reader_func_ftype *die_reader_func, | |
5986 | void *data) | |
5987 | { | |
33e80786 | 5988 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5989 | } |
0018ea6f DE |
5990 | \f |
5991 | /* Type Unit Groups. | |
dee91e82 | 5992 | |
0018ea6f DE |
5993 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5994 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5995 | so that all types coming from the same compilation (.o file) are grouped | |
5996 | together. A future step could be to put the types in the same symtab as | |
5997 | the CU the types ultimately came from. */ | |
ff013f42 | 5998 | |
f4dc4d17 DE |
5999 | static hashval_t |
6000 | hash_type_unit_group (const void *item) | |
6001 | { | |
9a3c8263 SM |
6002 | const struct type_unit_group *tu_group |
6003 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6004 | |
094b34ac | 6005 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6006 | } |
348e048f DE |
6007 | |
6008 | static int | |
f4dc4d17 | 6009 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6010 | { |
9a3c8263 SM |
6011 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6012 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6013 | |
094b34ac | 6014 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6015 | } |
348e048f | 6016 | |
f4dc4d17 DE |
6017 | /* Allocate a hash table for type unit groups. */ |
6018 | ||
6019 | static htab_t | |
6020 | allocate_type_unit_groups_table (void) | |
6021 | { | |
6022 | return htab_create_alloc_ex (3, | |
6023 | hash_type_unit_group, | |
6024 | eq_type_unit_group, | |
6025 | NULL, | |
6026 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6027 | hashtab_obstack_allocate, | |
6028 | dummy_obstack_deallocate); | |
6029 | } | |
dee91e82 | 6030 | |
f4dc4d17 DE |
6031 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6032 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6033 | of any one psymtab grow too big. */ | |
6034 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6035 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6036 | |
094b34ac | 6037 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6038 | Create the type_unit_group object used to hold one or more TUs. */ |
6039 | ||
6040 | static struct type_unit_group * | |
094b34ac | 6041 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6042 | { |
6043 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6044 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6045 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6046 | |
6047 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6048 | struct type_unit_group); | |
094b34ac | 6049 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6050 | per_cu->objfile = objfile; |
f4dc4d17 | 6051 | |
094b34ac DE |
6052 | if (dwarf2_per_objfile->using_index) |
6053 | { | |
6054 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6055 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6056 | } |
6057 | else | |
6058 | { | |
9c541725 | 6059 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6060 | struct partial_symtab *pst; |
6061 | char *name; | |
6062 | ||
6063 | /* Give the symtab a useful name for debug purposes. */ | |
6064 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6065 | name = xstrprintf ("<type_units_%d>", | |
6066 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6067 | else | |
6068 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6069 | ||
6070 | pst = create_partial_symtab (per_cu, name); | |
6071 | pst->anonymous = 1; | |
f4dc4d17 | 6072 | |
094b34ac DE |
6073 | xfree (name); |
6074 | } | |
f4dc4d17 | 6075 | |
094b34ac | 6076 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6077 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6078 | |
6079 | return tu_group; | |
6080 | } | |
6081 | ||
094b34ac DE |
6082 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6083 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6084 | |
6085 | static struct type_unit_group * | |
ff39bb5e | 6086 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6087 | { |
6088 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6089 | struct type_unit_group *tu_group; | |
6090 | void **slot; | |
6091 | unsigned int line_offset; | |
6092 | struct type_unit_group type_unit_group_for_lookup; | |
6093 | ||
6094 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6095 | { | |
6096 | dwarf2_per_objfile->type_unit_groups = | |
6097 | allocate_type_unit_groups_table (); | |
6098 | } | |
6099 | ||
6100 | /* Do we need to create a new group, or can we use an existing one? */ | |
6101 | ||
6102 | if (stmt_list) | |
6103 | { | |
6104 | line_offset = DW_UNSND (stmt_list); | |
6105 | ++tu_stats->nr_symtab_sharers; | |
6106 | } | |
6107 | else | |
6108 | { | |
6109 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6110 | We can do various things here like create one group per TU or | |
6111 | spread them over multiple groups to split up the expansion work. | |
6112 | To avoid worst case scenarios (too many groups or too large groups) | |
6113 | we, umm, group them in bunches. */ | |
6114 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6115 | | (tu_stats->nr_stmt_less_type_units | |
6116 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6117 | ++tu_stats->nr_stmt_less_type_units; | |
6118 | } | |
6119 | ||
094b34ac | 6120 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6121 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6122 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6123 | &type_unit_group_for_lookup, INSERT); | |
6124 | if (*slot != NULL) | |
6125 | { | |
9a3c8263 | 6126 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6127 | gdb_assert (tu_group != NULL); |
6128 | } | |
6129 | else | |
6130 | { | |
9c541725 | 6131 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6132 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6133 | *slot = tu_group; |
6134 | ++tu_stats->nr_symtabs; | |
6135 | } | |
6136 | ||
6137 | return tu_group; | |
6138 | } | |
0018ea6f DE |
6139 | \f |
6140 | /* Partial symbol tables. */ | |
6141 | ||
6142 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6143 | ||
6144 | The caller must fill in the following details: | |
6145 | dirname, textlow, texthigh. */ | |
6146 | ||
6147 | static struct partial_symtab * | |
6148 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6149 | { | |
6150 | struct objfile *objfile = per_cu->objfile; | |
6151 | struct partial_symtab *pst; | |
6152 | ||
18a94d75 | 6153 | pst = start_psymtab_common (objfile, name, 0, |
0018ea6f DE |
6154 | objfile->global_psymbols.next, |
6155 | objfile->static_psymbols.next); | |
6156 | ||
6157 | pst->psymtabs_addrmap_supported = 1; | |
6158 | ||
6159 | /* This is the glue that links PST into GDB's symbol API. */ | |
6160 | pst->read_symtab_private = per_cu; | |
6161 | pst->read_symtab = dwarf2_read_symtab; | |
6162 | per_cu->v.psymtab = pst; | |
6163 | ||
6164 | return pst; | |
6165 | } | |
6166 | ||
b93601f3 TT |
6167 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6168 | type. */ | |
6169 | ||
6170 | struct process_psymtab_comp_unit_data | |
6171 | { | |
6172 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6173 | ||
6174 | int want_partial_unit; | |
6175 | ||
6176 | /* The "pretend" language that is used if the CU doesn't declare a | |
6177 | language. */ | |
6178 | ||
6179 | enum language pretend_language; | |
6180 | }; | |
6181 | ||
0018ea6f DE |
6182 | /* die_reader_func for process_psymtab_comp_unit. */ |
6183 | ||
6184 | static void | |
6185 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6186 | const gdb_byte *info_ptr, |
0018ea6f DE |
6187 | struct die_info *comp_unit_die, |
6188 | int has_children, | |
6189 | void *data) | |
6190 | { | |
6191 | struct dwarf2_cu *cu = reader->cu; | |
6192 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 6193 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 6194 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6195 | CORE_ADDR baseaddr; |
6196 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6197 | struct partial_symtab *pst; | |
3a2b436a | 6198 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6199 | const char *filename; |
9a3c8263 SM |
6200 | struct process_psymtab_comp_unit_data *info |
6201 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 6202 | |
b93601f3 | 6203 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6204 | return; |
6205 | ||
6206 | gdb_assert (! per_cu->is_debug_types); | |
6207 | ||
b93601f3 | 6208 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6209 | |
6210 | cu->list_in_scope = &file_symbols; | |
6211 | ||
6212 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
6213 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6214 | if (filename == NULL) | |
0018ea6f | 6215 | filename = ""; |
0018ea6f DE |
6216 | |
6217 | pst = create_partial_symtab (per_cu, filename); | |
6218 | ||
6219 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6220 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
6221 | |
6222 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6223 | ||
6224 | dwarf2_find_base_address (comp_unit_die, cu); | |
6225 | ||
6226 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6227 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6228 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6229 | &best_highpc, cu, pst); | |
6230 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6231 | /* Store the contiguous range if it is not empty; it can be empty for |
6232 | CUs with no code. */ | |
6233 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6234 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6235 | best_lowpc + baseaddr), | |
6236 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6237 | best_highpc + baseaddr) - 1, | |
6238 | pst); | |
0018ea6f DE |
6239 | |
6240 | /* Check if comp unit has_children. | |
6241 | If so, read the rest of the partial symbols from this comp unit. | |
6242 | If not, there's no more debug_info for this comp unit. */ | |
6243 | if (has_children) | |
6244 | { | |
6245 | struct partial_die_info *first_die; | |
6246 | CORE_ADDR lowpc, highpc; | |
6247 | ||
6248 | lowpc = ((CORE_ADDR) -1); | |
6249 | highpc = ((CORE_ADDR) 0); | |
6250 | ||
6251 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6252 | ||
6253 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6254 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6255 | |
6256 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6257 | complaints from `maint check'. */ | |
6258 | if (lowpc == ((CORE_ADDR) -1)) | |
6259 | lowpc = highpc; | |
6260 | ||
6261 | /* If the compilation unit didn't have an explicit address range, | |
6262 | then use the information extracted from its child dies. */ | |
e385593e | 6263 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6264 | { |
6265 | best_lowpc = lowpc; | |
6266 | best_highpc = highpc; | |
6267 | } | |
6268 | } | |
3e29f34a MR |
6269 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6270 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6271 | |
8763cede | 6272 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6273 | |
6274 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6275 | { | |
6276 | int i; | |
6277 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6278 | struct dwarf2_per_cu_data *iter; | |
6279 | ||
6280 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6281 | post-pass. */ | |
6282 | pst->number_of_dependencies = len; | |
8d749320 SM |
6283 | pst->dependencies = |
6284 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6285 | for (i = 0; |
6286 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6287 | i, iter); | |
6288 | ++i) | |
6289 | pst->dependencies[i] = iter->v.psymtab; | |
6290 | ||
6291 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6292 | } | |
6293 | ||
6294 | /* Get the list of files included in the current compilation unit, | |
6295 | and build a psymtab for each of them. */ | |
6296 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6297 | ||
b4f54984 | 6298 | if (dwarf_read_debug) |
0018ea6f DE |
6299 | { |
6300 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6301 | ||
6302 | fprintf_unfiltered (gdb_stdlog, | |
6303 | "Psymtab for %s unit @0x%x: %s - %s" | |
6304 | ", %d global, %d static syms\n", | |
6305 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6306 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
6307 | paddress (gdbarch, pst->textlow), |
6308 | paddress (gdbarch, pst->texthigh), | |
6309 | pst->n_global_syms, pst->n_static_syms); | |
6310 | } | |
6311 | } | |
6312 | ||
6313 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6314 | Process compilation unit THIS_CU for a psymtab. */ | |
6315 | ||
6316 | static void | |
6317 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6318 | int want_partial_unit, |
6319 | enum language pretend_language) | |
0018ea6f DE |
6320 | { |
6321 | /* If this compilation unit was already read in, free the | |
6322 | cached copy in order to read it in again. This is | |
6323 | necessary because we skipped some symbols when we first | |
6324 | read in the compilation unit (see load_partial_dies). | |
6325 | This problem could be avoided, but the benefit is unclear. */ | |
6326 | if (this_cu->cu != NULL) | |
6327 | free_one_cached_comp_unit (this_cu); | |
6328 | ||
f1902523 JK |
6329 | if (this_cu->is_debug_types) |
6330 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
6331 | NULL); | |
6332 | else | |
6333 | { | |
6334 | process_psymtab_comp_unit_data info; | |
6335 | info.want_partial_unit = want_partial_unit; | |
6336 | info.pretend_language = pretend_language; | |
6337 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
6338 | process_psymtab_comp_unit_reader, &info); | |
6339 | } | |
0018ea6f DE |
6340 | |
6341 | /* Age out any secondary CUs. */ | |
6342 | age_cached_comp_units (); | |
6343 | } | |
f4dc4d17 DE |
6344 | |
6345 | /* Reader function for build_type_psymtabs. */ | |
6346 | ||
6347 | static void | |
6348 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6349 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6350 | struct die_info *type_unit_die, |
6351 | int has_children, | |
6352 | void *data) | |
6353 | { | |
6354 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6355 | struct dwarf2_cu *cu = reader->cu; | |
6356 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6357 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6358 | struct type_unit_group *tu_group; |
6359 | struct attribute *attr; | |
6360 | struct partial_die_info *first_die; | |
6361 | CORE_ADDR lowpc, highpc; | |
6362 | struct partial_symtab *pst; | |
6363 | ||
6364 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6365 | gdb_assert (per_cu->is_debug_types); |
6366 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6367 | |
6368 | if (! has_children) | |
6369 | return; | |
6370 | ||
6371 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6372 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6373 | |
0186c6a7 | 6374 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6375 | |
6376 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6377 | cu->list_in_scope = &file_symbols; | |
6378 | pst = create_partial_symtab (per_cu, ""); | |
6379 | pst->anonymous = 1; | |
6380 | ||
6381 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6382 | ||
6383 | lowpc = (CORE_ADDR) -1; | |
6384 | highpc = (CORE_ADDR) 0; | |
6385 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6386 | ||
8763cede | 6387 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6388 | } |
6389 | ||
73051182 DE |
6390 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6391 | ||
6392 | struct tu_abbrev_offset | |
6393 | { | |
6394 | struct signatured_type *sig_type; | |
6395 | sect_offset abbrev_offset; | |
6396 | }; | |
6397 | ||
6398 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6399 | ||
6400 | static int | |
6401 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6402 | { | |
9a3c8263 SM |
6403 | const struct tu_abbrev_offset * const *a |
6404 | = (const struct tu_abbrev_offset * const*) ap; | |
6405 | const struct tu_abbrev_offset * const *b | |
6406 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
6407 | sect_offset aoff = (*a)->abbrev_offset; |
6408 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
6409 | |
6410 | return (aoff > boff) - (aoff < boff); | |
6411 | } | |
6412 | ||
6413 | /* Efficiently read all the type units. | |
6414 | This does the bulk of the work for build_type_psymtabs. | |
6415 | ||
6416 | The efficiency is because we sort TUs by the abbrev table they use and | |
6417 | only read each abbrev table once. In one program there are 200K TUs | |
6418 | sharing 8K abbrev tables. | |
6419 | ||
6420 | The main purpose of this function is to support building the | |
6421 | dwarf2_per_objfile->type_unit_groups table. | |
6422 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6423 | can collapse the search space by grouping them by stmt_list. | |
6424 | The savings can be significant, in the same program from above the 200K TUs | |
6425 | share 8K stmt_list tables. | |
6426 | ||
6427 | FUNC is expected to call get_type_unit_group, which will create the | |
6428 | struct type_unit_group if necessary and add it to | |
6429 | dwarf2_per_objfile->type_unit_groups. */ | |
6430 | ||
6431 | static void | |
6432 | build_type_psymtabs_1 (void) | |
6433 | { | |
73051182 DE |
6434 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
6435 | struct cleanup *cleanups; | |
6436 | struct abbrev_table *abbrev_table; | |
6437 | sect_offset abbrev_offset; | |
6438 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
6439 | int i; |
6440 | ||
6441 | /* It's up to the caller to not call us multiple times. */ | |
6442 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6443 | ||
6444 | if (dwarf2_per_objfile->n_type_units == 0) | |
6445 | return; | |
6446 | ||
6447 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6448 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6449 | read each abbrev table in. | |
6450 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6451 | This is simpler and efficient enough for now. | |
6452 | ||
6453 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6454 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6455 | stmt_list value too so in practice this should work well. | |
6456 | ||
6457 | The basic algorithm here is: | |
6458 | ||
6459 | sort TUs by abbrev table | |
6460 | for each TU with same abbrev table: | |
6461 | read abbrev table if first user | |
6462 | read TU top level DIE | |
6463 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6464 | call FUNC */ | |
6465 | ||
b4f54984 | 6466 | if (dwarf_read_debug) |
73051182 DE |
6467 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6468 | ||
6469 | /* Sort in a separate table to maintain the order of all_type_units | |
6470 | for .gdb_index: TU indices directly index all_type_units. */ | |
6471 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6472 | dwarf2_per_objfile->n_type_units); | |
6473 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6474 | { | |
6475 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6476 | ||
6477 | sorted_by_abbrev[i].sig_type = sig_type; | |
6478 | sorted_by_abbrev[i].abbrev_offset = | |
6479 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 6480 | sig_type->per_cu.sect_off); |
73051182 DE |
6481 | } |
6482 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6483 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6484 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6485 | ||
9c541725 | 6486 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
6487 | abbrev_table = NULL; |
6488 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6489 | ||
6490 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6491 | { | |
6492 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6493 | ||
6494 | /* Switch to the next abbrev table if necessary. */ | |
6495 | if (abbrev_table == NULL | |
9c541725 | 6496 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
6497 | { |
6498 | if (abbrev_table != NULL) | |
6499 | { | |
6500 | abbrev_table_free (abbrev_table); | |
6501 | /* Reset to NULL in case abbrev_table_read_table throws | |
6502 | an error: abbrev_table_free_cleanup will get called. */ | |
6503 | abbrev_table = NULL; | |
6504 | } | |
6505 | abbrev_offset = tu->abbrev_offset; | |
6506 | abbrev_table = | |
6507 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6508 | abbrev_offset); | |
6509 | ++tu_stats->nr_uniq_abbrev_tables; | |
6510 | } | |
6511 | ||
6512 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6513 | build_type_psymtabs_reader, NULL); | |
6514 | } | |
6515 | ||
73051182 | 6516 | do_cleanups (cleanups); |
6aa5f3a6 | 6517 | } |
73051182 | 6518 | |
6aa5f3a6 DE |
6519 | /* Print collected type unit statistics. */ |
6520 | ||
6521 | static void | |
6522 | print_tu_stats (void) | |
6523 | { | |
6524 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6525 | ||
6526 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6527 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6528 | dwarf2_per_objfile->n_type_units); | |
6529 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6530 | tu_stats->nr_uniq_abbrev_tables); | |
6531 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6532 | tu_stats->nr_symtabs); | |
6533 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6534 | tu_stats->nr_symtab_sharers); | |
6535 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6536 | tu_stats->nr_stmt_less_type_units); | |
6537 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6538 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6539 | } |
6540 | ||
f4dc4d17 DE |
6541 | /* Traversal function for build_type_psymtabs. */ |
6542 | ||
6543 | static int | |
6544 | build_type_psymtab_dependencies (void **slot, void *info) | |
6545 | { | |
6546 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6547 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6548 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6549 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6550 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6551 | struct signatured_type *iter; | |
f4dc4d17 DE |
6552 | int i; |
6553 | ||
6554 | gdb_assert (len > 0); | |
0186c6a7 | 6555 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6556 | |
6557 | pst->number_of_dependencies = len; | |
8d749320 SM |
6558 | pst->dependencies = |
6559 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6560 | for (i = 0; |
0186c6a7 | 6561 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6562 | ++i) |
6563 | { | |
0186c6a7 DE |
6564 | gdb_assert (iter->per_cu.is_debug_types); |
6565 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6566 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6567 | } |
6568 | ||
0186c6a7 | 6569 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6570 | |
6571 | return 1; | |
6572 | } | |
6573 | ||
6574 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6575 | Build partial symbol tables for the .debug_types comp-units. */ | |
6576 | ||
6577 | static void | |
6578 | build_type_psymtabs (struct objfile *objfile) | |
6579 | { | |
0e50663e | 6580 | if (! create_all_type_units (objfile)) |
348e048f DE |
6581 | return; |
6582 | ||
73051182 | 6583 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6584 | } |
f4dc4d17 | 6585 | |
6aa5f3a6 DE |
6586 | /* Traversal function for process_skeletonless_type_unit. |
6587 | Read a TU in a DWO file and build partial symbols for it. */ | |
6588 | ||
6589 | static int | |
6590 | process_skeletonless_type_unit (void **slot, void *info) | |
6591 | { | |
6592 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6593 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6594 | struct signatured_type find_entry, *entry; |
6595 | ||
6596 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6597 | ||
6598 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6599 | { | |
6600 | dwarf2_per_objfile->signatured_types | |
6601 | = allocate_signatured_type_table (objfile); | |
6602 | } | |
6603 | ||
6604 | find_entry.signature = dwo_unit->signature; | |
6605 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6606 | INSERT); | |
6607 | /* If we've already seen this type there's nothing to do. What's happening | |
6608 | is we're doing our own version of comdat-folding here. */ | |
6609 | if (*slot != NULL) | |
6610 | return 1; | |
6611 | ||
6612 | /* This does the job that create_all_type_units would have done for | |
6613 | this TU. */ | |
6614 | entry = add_type_unit (dwo_unit->signature, slot); | |
6615 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6616 | *slot = entry; | |
6617 | ||
6618 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6619 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6620 | build_type_psymtabs_reader, NULL); | |
6621 | ||
6622 | return 1; | |
6623 | } | |
6624 | ||
6625 | /* Traversal function for process_skeletonless_type_units. */ | |
6626 | ||
6627 | static int | |
6628 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6629 | { | |
6630 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6631 | ||
6632 | if (dwo_file->tus != NULL) | |
6633 | { | |
6634 | htab_traverse_noresize (dwo_file->tus, | |
6635 | process_skeletonless_type_unit, info); | |
6636 | } | |
6637 | ||
6638 | return 1; | |
6639 | } | |
6640 | ||
6641 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6642 | This is needed in case a TU was emitted without its skeleton. | |
6643 | Note: This can't be done until we know what all the DWO files are. */ | |
6644 | ||
6645 | static void | |
6646 | process_skeletonless_type_units (struct objfile *objfile) | |
6647 | { | |
6648 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6649 | if (get_dwp_file () == NULL | |
6650 | && dwarf2_per_objfile->dwo_files != NULL) | |
6651 | { | |
6652 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6653 | process_dwo_file_for_skeletonless_type_units, | |
6654 | objfile); | |
6655 | } | |
348e048f DE |
6656 | } |
6657 | ||
60606b2c TT |
6658 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6659 | ||
6660 | static void | |
6661 | psymtabs_addrmap_cleanup (void *o) | |
6662 | { | |
9a3c8263 | 6663 | struct objfile *objfile = (struct objfile *) o; |
ec61707d | 6664 | |
60606b2c TT |
6665 | objfile->psymtabs_addrmap = NULL; |
6666 | } | |
6667 | ||
95554aad TT |
6668 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6669 | ||
6670 | static void | |
6671 | set_partial_user (struct objfile *objfile) | |
6672 | { | |
6673 | int i; | |
6674 | ||
6675 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6676 | { | |
8832e7e3 | 6677 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6678 | struct partial_symtab *pst = per_cu->v.psymtab; |
6679 | int j; | |
6680 | ||
36586728 TT |
6681 | if (pst == NULL) |
6682 | continue; | |
6683 | ||
95554aad TT |
6684 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6685 | { | |
6686 | /* Set the 'user' field only if it is not already set. */ | |
6687 | if (pst->dependencies[j]->user == NULL) | |
6688 | pst->dependencies[j]->user = pst; | |
6689 | } | |
6690 | } | |
6691 | } | |
6692 | ||
93311388 DE |
6693 | /* Build the partial symbol table by doing a quick pass through the |
6694 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6695 | |
93311388 | 6696 | static void |
c67a9c90 | 6697 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6698 | { |
60606b2c | 6699 | struct cleanup *back_to, *addrmap_cleanup; |
21b2bd31 | 6700 | int i; |
93311388 | 6701 | |
b4f54984 | 6702 | if (dwarf_read_debug) |
45cfd468 DE |
6703 | { |
6704 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6705 | objfile_name (objfile)); |
45cfd468 DE |
6706 | } |
6707 | ||
98bfdba5 PA |
6708 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6709 | ||
be391dca | 6710 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6711 | |
93311388 DE |
6712 | /* Any cached compilation units will be linked by the per-objfile |
6713 | read_in_chain. Make sure to free them when we're done. */ | |
6714 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6715 | |
348e048f DE |
6716 | build_type_psymtabs (objfile); |
6717 | ||
93311388 | 6718 | create_all_comp_units (objfile); |
c906108c | 6719 | |
60606b2c TT |
6720 | /* Create a temporary address map on a temporary obstack. We later |
6721 | copy this to the final obstack. */ | |
8268c778 | 6722 | auto_obstack temp_obstack; |
60606b2c TT |
6723 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); |
6724 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6725 | |
21b2bd31 | 6726 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6727 | { |
8832e7e3 | 6728 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6729 | |
b93601f3 | 6730 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6731 | } |
ff013f42 | 6732 | |
6aa5f3a6 DE |
6733 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6734 | process_skeletonless_type_units (objfile); | |
6735 | ||
6736 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6737 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6738 | { | |
6739 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6740 | build_type_psymtab_dependencies, NULL); | |
6741 | } | |
6742 | ||
b4f54984 | 6743 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6744 | print_tu_stats (); |
6745 | ||
95554aad TT |
6746 | set_partial_user (objfile); |
6747 | ||
ff013f42 JK |
6748 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6749 | &objfile->objfile_obstack); | |
60606b2c | 6750 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6751 | |
ae038cb0 | 6752 | do_cleanups (back_to); |
45cfd468 | 6753 | |
b4f54984 | 6754 | if (dwarf_read_debug) |
45cfd468 | 6755 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6756 | objfile_name (objfile)); |
ae038cb0 DJ |
6757 | } |
6758 | ||
3019eac3 | 6759 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6760 | |
6761 | static void | |
dee91e82 | 6762 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6763 | const gdb_byte *info_ptr, |
dee91e82 DE |
6764 | struct die_info *comp_unit_die, |
6765 | int has_children, | |
6766 | void *data) | |
ae038cb0 | 6767 | { |
dee91e82 | 6768 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6769 | |
95554aad | 6770 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6771 | |
ae038cb0 DJ |
6772 | /* Check if comp unit has_children. |
6773 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6774 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6775 | if (has_children) |
dee91e82 DE |
6776 | load_partial_dies (reader, info_ptr, 0); |
6777 | } | |
98bfdba5 | 6778 | |
dee91e82 DE |
6779 | /* Load the partial DIEs for a secondary CU into memory. |
6780 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6781 | |
dee91e82 DE |
6782 | static void |
6783 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6784 | { | |
f4dc4d17 DE |
6785 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6786 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6787 | } |
6788 | ||
ae038cb0 | 6789 | static void |
36586728 TT |
6790 | read_comp_units_from_section (struct objfile *objfile, |
6791 | struct dwarf2_section_info *section, | |
f1902523 | 6792 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
6793 | unsigned int is_dwz, |
6794 | int *n_allocated, | |
6795 | int *n_comp_units, | |
6796 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6797 | { |
d521ce57 | 6798 | const gdb_byte *info_ptr; |
a32a8923 | 6799 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6800 | |
b4f54984 | 6801 | if (dwarf_read_debug) |
bf6af496 | 6802 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6803 | get_section_name (section), |
6804 | get_section_file_name (section)); | |
bf6af496 | 6805 | |
36586728 | 6806 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6807 | |
36586728 | 6808 | info_ptr = section->buffer; |
6e70227d | 6809 | |
36586728 | 6810 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6811 | { |
ae038cb0 | 6812 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 6813 | |
9c541725 | 6814 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 6815 | |
f1902523 JK |
6816 | comp_unit_head cu_header; |
6817 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
6818 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
6819 | |
6820 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
6821 | if (cu_header.unit_type != DW_UT_type) |
6822 | { | |
6823 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
6824 | struct dwarf2_per_cu_data); | |
6825 | memset (this_cu, 0, sizeof (*this_cu)); | |
6826 | } | |
6827 | else | |
6828 | { | |
6829 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
6830 | struct signatured_type); | |
6831 | memset (sig_type, 0, sizeof (*sig_type)); | |
6832 | sig_type->signature = cu_header.signature; | |
6833 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
6834 | this_cu = &sig_type->per_cu; | |
6835 | } | |
6836 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 6837 | this_cu->sect_off = sect_off; |
f1902523 | 6838 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 6839 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6840 | this_cu->objfile = objfile; |
8a0459fd | 6841 | this_cu->section = section; |
ae038cb0 | 6842 | |
36586728 | 6843 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6844 | { |
36586728 | 6845 | *n_allocated *= 2; |
224c3ddb SM |
6846 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6847 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6848 | } |
36586728 TT |
6849 | (*all_comp_units)[*n_comp_units] = this_cu; |
6850 | ++*n_comp_units; | |
ae038cb0 DJ |
6851 | |
6852 | info_ptr = info_ptr + this_cu->length; | |
6853 | } | |
36586728 TT |
6854 | } |
6855 | ||
6856 | /* Create a list of all compilation units in OBJFILE. | |
6857 | This is only done for -readnow and building partial symtabs. */ | |
6858 | ||
6859 | static void | |
6860 | create_all_comp_units (struct objfile *objfile) | |
6861 | { | |
6862 | int n_allocated; | |
6863 | int n_comp_units; | |
6864 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6865 | struct dwz_file *dwz; |
36586728 TT |
6866 | |
6867 | n_comp_units = 0; | |
6868 | n_allocated = 10; | |
8d749320 | 6869 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 6870 | |
f1902523 JK |
6871 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
6872 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
6873 | &n_allocated, &n_comp_units, &all_comp_units); |
6874 | ||
4db1a1dc TT |
6875 | dwz = dwarf2_get_dwz_file (); |
6876 | if (dwz != NULL) | |
f1902523 | 6877 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
6878 | &n_allocated, &n_comp_units, |
6879 | &all_comp_units); | |
ae038cb0 | 6880 | |
8d749320 SM |
6881 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6882 | struct dwarf2_per_cu_data *, | |
6883 | n_comp_units); | |
ae038cb0 DJ |
6884 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6885 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6886 | xfree (all_comp_units); | |
6887 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6888 | } |
6889 | ||
5734ee8b | 6890 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6891 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6892 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6893 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6894 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6895 | |
72bf9492 DJ |
6896 | static void |
6897 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6898 | CORE_ADDR *highpc, int set_addrmap, |
6899 | struct dwarf2_cu *cu) | |
c906108c | 6900 | { |
72bf9492 | 6901 | struct partial_die_info *pdi; |
c906108c | 6902 | |
91c24f0a DC |
6903 | /* Now, march along the PDI's, descending into ones which have |
6904 | interesting children but skipping the children of the other ones, | |
6905 | until we reach the end of the compilation unit. */ | |
c906108c | 6906 | |
72bf9492 | 6907 | pdi = first_die; |
91c24f0a | 6908 | |
72bf9492 DJ |
6909 | while (pdi != NULL) |
6910 | { | |
6911 | fixup_partial_die (pdi, cu); | |
c906108c | 6912 | |
f55ee35c | 6913 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6914 | children, so we need to look at them. Ditto for anonymous |
6915 | enums. */ | |
933c6fe4 | 6916 | |
72bf9492 | 6917 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6918 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6919 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6920 | { |
72bf9492 | 6921 | switch (pdi->tag) |
c906108c SS |
6922 | { |
6923 | case DW_TAG_subprogram: | |
cdc07690 | 6924 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6925 | break; |
72929c62 | 6926 | case DW_TAG_constant: |
c906108c SS |
6927 | case DW_TAG_variable: |
6928 | case DW_TAG_typedef: | |
91c24f0a | 6929 | case DW_TAG_union_type: |
72bf9492 | 6930 | if (!pdi->is_declaration) |
63d06c5c | 6931 | { |
72bf9492 | 6932 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6933 | } |
6934 | break; | |
c906108c | 6935 | case DW_TAG_class_type: |
680b30c7 | 6936 | case DW_TAG_interface_type: |
c906108c | 6937 | case DW_TAG_structure_type: |
72bf9492 | 6938 | if (!pdi->is_declaration) |
c906108c | 6939 | { |
72bf9492 | 6940 | add_partial_symbol (pdi, cu); |
c906108c | 6941 | } |
e98c9e7c TT |
6942 | if (cu->language == language_rust && pdi->has_children) |
6943 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
6944 | set_addrmap, cu); | |
c906108c | 6945 | break; |
91c24f0a | 6946 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6947 | if (!pdi->is_declaration) |
6948 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6949 | break; |
6950 | case DW_TAG_base_type: | |
a02abb62 | 6951 | case DW_TAG_subrange_type: |
c906108c | 6952 | /* File scope base type definitions are added to the partial |
c5aa993b | 6953 | symbol table. */ |
72bf9492 | 6954 | add_partial_symbol (pdi, cu); |
c906108c | 6955 | break; |
d9fa45fe | 6956 | case DW_TAG_namespace: |
cdc07690 | 6957 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6958 | break; |
5d7cb8df | 6959 | case DW_TAG_module: |
cdc07690 | 6960 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6961 | break; |
95554aad TT |
6962 | case DW_TAG_imported_unit: |
6963 | { | |
6964 | struct dwarf2_per_cu_data *per_cu; | |
6965 | ||
f4dc4d17 DE |
6966 | /* For now we don't handle imported units in type units. */ |
6967 | if (cu->per_cu->is_debug_types) | |
6968 | { | |
6969 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6970 | " supported in type units [in module %s]"), | |
4262abfb | 6971 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6972 | } |
6973 | ||
9c541725 | 6974 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 6975 | pdi->is_dwz, |
95554aad TT |
6976 | cu->objfile); |
6977 | ||
6978 | /* Go read the partial unit, if needed. */ | |
6979 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6980 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6981 | |
f4dc4d17 | 6982 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6983 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6984 | } |
6985 | break; | |
74921315 KS |
6986 | case DW_TAG_imported_declaration: |
6987 | add_partial_symbol (pdi, cu); | |
6988 | break; | |
c906108c SS |
6989 | default: |
6990 | break; | |
6991 | } | |
6992 | } | |
6993 | ||
72bf9492 DJ |
6994 | /* If the die has a sibling, skip to the sibling. */ |
6995 | ||
6996 | pdi = pdi->die_sibling; | |
6997 | } | |
6998 | } | |
6999 | ||
7000 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7001 | |
72bf9492 | 7002 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7003 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7004 | Enumerators are an exception; they use the scope of their parent |
7005 | enumeration type, i.e. the name of the enumeration type is not | |
7006 | prepended to the enumerator. | |
91c24f0a | 7007 | |
72bf9492 DJ |
7008 | There are two complexities. One is DW_AT_specification; in this |
7009 | case "parent" means the parent of the target of the specification, | |
7010 | instead of the direct parent of the DIE. The other is compilers | |
7011 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7012 | the fully qualified name of structure types from their members' | |
7013 | linkage names. This must be done using the DIE's children rather | |
7014 | than the children of any DW_AT_specification target. We only need | |
7015 | to do this for structures at the top level, i.e. if the target of | |
7016 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7017 | have a parent. */ | |
7018 | ||
7019 | /* Compute the scope prefix associated with PDI's parent, in | |
7020 | compilation unit CU. The result will be allocated on CU's | |
7021 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7022 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7023 | static const char * |
72bf9492 DJ |
7024 | partial_die_parent_scope (struct partial_die_info *pdi, |
7025 | struct dwarf2_cu *cu) | |
7026 | { | |
15d034d0 | 7027 | const char *grandparent_scope; |
72bf9492 | 7028 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7029 | |
72bf9492 DJ |
7030 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7031 | then this means the parent of the specification DIE. */ | |
7032 | ||
7033 | real_pdi = pdi; | |
72bf9492 | 7034 | while (real_pdi->has_specification) |
36586728 TT |
7035 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7036 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7037 | |
7038 | parent = real_pdi->die_parent; | |
7039 | if (parent == NULL) | |
7040 | return NULL; | |
7041 | ||
7042 | if (parent->scope_set) | |
7043 | return parent->scope; | |
7044 | ||
7045 | fixup_partial_die (parent, cu); | |
7046 | ||
10b3939b | 7047 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7048 | |
acebe513 UW |
7049 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7050 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7051 | Work around this problem here. */ | |
7052 | if (cu->language == language_cplus | |
6e70227d | 7053 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7054 | && strcmp (parent->name, "::") == 0 |
7055 | && grandparent_scope == NULL) | |
7056 | { | |
7057 | parent->scope = NULL; | |
7058 | parent->scope_set = 1; | |
7059 | return NULL; | |
7060 | } | |
7061 | ||
9c6c53f7 SA |
7062 | if (pdi->tag == DW_TAG_enumerator) |
7063 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7064 | parent->scope = grandparent_scope; | |
7065 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7066 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7067 | || parent->tag == DW_TAG_structure_type |
7068 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7069 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7070 | || parent->tag == DW_TAG_union_type |
7071 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7072 | { |
7073 | if (grandparent_scope == NULL) | |
7074 | parent->scope = parent->name; | |
7075 | else | |
3e43a32a MS |
7076 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7077 | grandparent_scope, | |
f55ee35c | 7078 | parent->name, 0, cu); |
72bf9492 | 7079 | } |
72bf9492 DJ |
7080 | else |
7081 | { | |
7082 | /* FIXME drow/2004-04-01: What should we be doing with | |
7083 | function-local names? For partial symbols, we should probably be | |
7084 | ignoring them. */ | |
7085 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7086 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7087 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7088 | parent->scope = grandparent_scope; |
c906108c SS |
7089 | } |
7090 | ||
72bf9492 DJ |
7091 | parent->scope_set = 1; |
7092 | return parent->scope; | |
7093 | } | |
7094 | ||
7095 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7096 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7097 | |
72bf9492 DJ |
7098 | static char * |
7099 | partial_die_full_name (struct partial_die_info *pdi, | |
7100 | struct dwarf2_cu *cu) | |
7101 | { | |
15d034d0 | 7102 | const char *parent_scope; |
72bf9492 | 7103 | |
98bfdba5 PA |
7104 | /* If this is a template instantiation, we can not work out the |
7105 | template arguments from partial DIEs. So, unfortunately, we have | |
7106 | to go through the full DIEs. At least any work we do building | |
7107 | types here will be reused if full symbols are loaded later. */ | |
7108 | if (pdi->has_template_arguments) | |
7109 | { | |
7110 | fixup_partial_die (pdi, cu); | |
7111 | ||
7112 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7113 | { | |
7114 | struct die_info *die; | |
7115 | struct attribute attr; | |
7116 | struct dwarf2_cu *ref_cu = cu; | |
7117 | ||
b64f50a1 | 7118 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7119 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7120 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7121 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7122 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7123 | ||
7124 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7125 | } | |
7126 | } | |
7127 | ||
72bf9492 DJ |
7128 | parent_scope = partial_die_parent_scope (pdi, cu); |
7129 | if (parent_scope == NULL) | |
7130 | return NULL; | |
7131 | else | |
f55ee35c | 7132 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7133 | } |
7134 | ||
7135 | static void | |
72bf9492 | 7136 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7137 | { |
e7c27a73 | 7138 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7139 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7140 | CORE_ADDR addr = 0; |
15d034d0 | 7141 | const char *actual_name = NULL; |
e142c38c | 7142 | CORE_ADDR baseaddr; |
15d034d0 | 7143 | char *built_actual_name; |
e142c38c DJ |
7144 | |
7145 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7146 | |
15d034d0 TT |
7147 | built_actual_name = partial_die_full_name (pdi, cu); |
7148 | if (built_actual_name != NULL) | |
7149 | actual_name = built_actual_name; | |
63d06c5c | 7150 | |
72bf9492 DJ |
7151 | if (actual_name == NULL) |
7152 | actual_name = pdi->name; | |
7153 | ||
c906108c SS |
7154 | switch (pdi->tag) |
7155 | { | |
7156 | case DW_TAG_subprogram: | |
3e29f34a | 7157 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7158 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7159 | { |
2cfa0c8d JB |
7160 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7161 | of the global scope. But in Ada, we want to be able to access | |
7162 | nested procedures globally. So all Ada subprograms are stored | |
7163 | in the global scope. */ | |
f47fb265 | 7164 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7165 | built_actual_name != NULL, |
f47fb265 MS |
7166 | VAR_DOMAIN, LOC_BLOCK, |
7167 | &objfile->global_psymbols, | |
1762568f | 7168 | addr, cu->language, objfile); |
c906108c SS |
7169 | } |
7170 | else | |
7171 | { | |
f47fb265 | 7172 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7173 | built_actual_name != NULL, |
f47fb265 MS |
7174 | VAR_DOMAIN, LOC_BLOCK, |
7175 | &objfile->static_psymbols, | |
1762568f | 7176 | addr, cu->language, objfile); |
c906108c | 7177 | } |
0c1b455e TT |
7178 | |
7179 | if (pdi->main_subprogram && actual_name != NULL) | |
7180 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7181 | break; |
72929c62 JB |
7182 | case DW_TAG_constant: |
7183 | { | |
7184 | struct psymbol_allocation_list *list; | |
7185 | ||
7186 | if (pdi->is_external) | |
7187 | list = &objfile->global_psymbols; | |
7188 | else | |
7189 | list = &objfile->static_psymbols; | |
f47fb265 | 7190 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7191 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7192 | list, 0, cu->language, objfile); |
72929c62 JB |
7193 | } |
7194 | break; | |
c906108c | 7195 | case DW_TAG_variable: |
95554aad TT |
7196 | if (pdi->d.locdesc) |
7197 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7198 | |
95554aad | 7199 | if (pdi->d.locdesc |
caac4577 JG |
7200 | && addr == 0 |
7201 | && !dwarf2_per_objfile->has_section_at_zero) | |
7202 | { | |
7203 | /* A global or static variable may also have been stripped | |
7204 | out by the linker if unused, in which case its address | |
7205 | will be nullified; do not add such variables into partial | |
7206 | symbol table then. */ | |
7207 | } | |
7208 | else if (pdi->is_external) | |
c906108c SS |
7209 | { |
7210 | /* Global Variable. | |
7211 | Don't enter into the minimal symbol tables as there is | |
7212 | a minimal symbol table entry from the ELF symbols already. | |
7213 | Enter into partial symbol table if it has a location | |
7214 | descriptor or a type. | |
7215 | If the location descriptor is missing, new_symbol will create | |
7216 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7217 | be determined from the minimal symbol table whenever the variable | |
7218 | is referenced. | |
7219 | The address for the partial symbol table entry is not | |
7220 | used by GDB, but it comes in handy for debugging partial symbol | |
7221 | table building. */ | |
7222 | ||
95554aad | 7223 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 7224 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7225 | built_actual_name != NULL, |
f47fb265 MS |
7226 | VAR_DOMAIN, LOC_STATIC, |
7227 | &objfile->global_psymbols, | |
1762568f | 7228 | addr + baseaddr, |
f47fb265 | 7229 | cu->language, objfile); |
c906108c SS |
7230 | } |
7231 | else | |
7232 | { | |
ff908ebf AW |
7233 | int has_loc = pdi->d.locdesc != NULL; |
7234 | ||
7235 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7236 | without location descriptors or constant values). */ | |
7237 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 7238 | { |
15d034d0 | 7239 | xfree (built_actual_name); |
decbce07 MS |
7240 | return; |
7241 | } | |
ff908ebf | 7242 | |
f47fb265 | 7243 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7244 | built_actual_name != NULL, |
f47fb265 MS |
7245 | VAR_DOMAIN, LOC_STATIC, |
7246 | &objfile->static_psymbols, | |
ff908ebf | 7247 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7248 | cu->language, objfile); |
c906108c SS |
7249 | } |
7250 | break; | |
7251 | case DW_TAG_typedef: | |
7252 | case DW_TAG_base_type: | |
a02abb62 | 7253 | case DW_TAG_subrange_type: |
38d518c9 | 7254 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7255 | built_actual_name != NULL, |
176620f1 | 7256 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7257 | &objfile->static_psymbols, |
1762568f | 7258 | 0, cu->language, objfile); |
c906108c | 7259 | break; |
74921315 | 7260 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7261 | case DW_TAG_namespace: |
7262 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7263 | built_actual_name != NULL, |
72bf9492 DJ |
7264 | VAR_DOMAIN, LOC_TYPEDEF, |
7265 | &objfile->global_psymbols, | |
1762568f | 7266 | 0, cu->language, objfile); |
72bf9492 | 7267 | break; |
530e8392 KB |
7268 | case DW_TAG_module: |
7269 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7270 | built_actual_name != NULL, | |
7271 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7272 | &objfile->global_psymbols, | |
1762568f | 7273 | 0, cu->language, objfile); |
530e8392 | 7274 | break; |
c906108c | 7275 | case DW_TAG_class_type: |
680b30c7 | 7276 | case DW_TAG_interface_type: |
c906108c SS |
7277 | case DW_TAG_structure_type: |
7278 | case DW_TAG_union_type: | |
7279 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7280 | /* Skip external references. The DWARF standard says in the section |
7281 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7282 | structure, union or class type is represented by a structure, | |
7283 | union or class entry that does not have a byte size attribute | |
7284 | and that has a DW_AT_declaration attribute." */ | |
7285 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7286 | { |
15d034d0 | 7287 | xfree (built_actual_name); |
decbce07 MS |
7288 | return; |
7289 | } | |
fa4028e9 | 7290 | |
63d06c5c DC |
7291 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7292 | static vs. global. */ | |
38d518c9 | 7293 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7294 | built_actual_name != NULL, |
176620f1 | 7295 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7296 | cu->language == language_cplus |
63d06c5c DC |
7297 | ? &objfile->global_psymbols |
7298 | : &objfile->static_psymbols, | |
1762568f | 7299 | 0, cu->language, objfile); |
c906108c | 7300 | |
c906108c SS |
7301 | break; |
7302 | case DW_TAG_enumerator: | |
38d518c9 | 7303 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7304 | built_actual_name != NULL, |
176620f1 | 7305 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7306 | cu->language == language_cplus |
f6fe98ef DJ |
7307 | ? &objfile->global_psymbols |
7308 | : &objfile->static_psymbols, | |
1762568f | 7309 | 0, cu->language, objfile); |
c906108c SS |
7310 | break; |
7311 | default: | |
7312 | break; | |
7313 | } | |
5c4e30ca | 7314 | |
15d034d0 | 7315 | xfree (built_actual_name); |
c906108c SS |
7316 | } |
7317 | ||
5c4e30ca DC |
7318 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7319 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7320 | the name of the enclosing namespace. */ | |
91c24f0a | 7321 | |
72bf9492 DJ |
7322 | static void |
7323 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7324 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7325 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7326 | { |
72bf9492 | 7327 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7328 | |
72bf9492 | 7329 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7330 | |
7331 | /* Now scan partial symbols in that namespace. */ | |
7332 | ||
91c24f0a | 7333 | if (pdi->has_children) |
cdc07690 | 7334 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7335 | } |
7336 | ||
5d7cb8df JK |
7337 | /* Read a partial die corresponding to a Fortran module. */ |
7338 | ||
7339 | static void | |
7340 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7341 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7342 | { |
530e8392 KB |
7343 | /* Add a symbol for the namespace. */ |
7344 | ||
7345 | add_partial_symbol (pdi, cu); | |
7346 | ||
f55ee35c | 7347 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7348 | |
7349 | if (pdi->has_children) | |
cdc07690 | 7350 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7351 | } |
7352 | ||
bc30ff58 JB |
7353 | /* Read a partial die corresponding to a subprogram and create a partial |
7354 | symbol for that subprogram. When the CU language allows it, this | |
7355 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7356 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7357 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7358 | and highest PC values found in PDI. | |
6e70227d | 7359 | |
cdc07690 YQ |
7360 | PDI may also be a lexical block, in which case we simply search |
7361 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7362 | Again, this is only performed when the CU language allows this |
7363 | type of definitions. */ | |
7364 | ||
7365 | static void | |
7366 | add_partial_subprogram (struct partial_die_info *pdi, | |
7367 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7368 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7369 | { |
7370 | if (pdi->tag == DW_TAG_subprogram) | |
7371 | { | |
7372 | if (pdi->has_pc_info) | |
7373 | { | |
7374 | if (pdi->lowpc < *lowpc) | |
7375 | *lowpc = pdi->lowpc; | |
7376 | if (pdi->highpc > *highpc) | |
7377 | *highpc = pdi->highpc; | |
cdc07690 | 7378 | if (set_addrmap) |
5734ee8b | 7379 | { |
5734ee8b | 7380 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7381 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7382 | CORE_ADDR baseaddr; | |
7383 | CORE_ADDR highpc; | |
7384 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7385 | |
7386 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7387 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7388 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7389 | pdi->lowpc + baseaddr); | |
7390 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7391 | pdi->highpc + baseaddr); | |
7392 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7393 | cu->per_cu->v.psymtab); |
5734ee8b | 7394 | } |
481860b3 GB |
7395 | } |
7396 | ||
7397 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7398 | { | |
bc30ff58 | 7399 | if (!pdi->is_declaration) |
e8d05480 JB |
7400 | /* Ignore subprogram DIEs that do not have a name, they are |
7401 | illegal. Do not emit a complaint at this point, we will | |
7402 | do so when we convert this psymtab into a symtab. */ | |
7403 | if (pdi->name) | |
7404 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7405 | } |
7406 | } | |
6e70227d | 7407 | |
bc30ff58 JB |
7408 | if (! pdi->has_children) |
7409 | return; | |
7410 | ||
7411 | if (cu->language == language_ada) | |
7412 | { | |
7413 | pdi = pdi->die_child; | |
7414 | while (pdi != NULL) | |
7415 | { | |
7416 | fixup_partial_die (pdi, cu); | |
7417 | if (pdi->tag == DW_TAG_subprogram | |
7418 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7419 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7420 | pdi = pdi->die_sibling; |
7421 | } | |
7422 | } | |
7423 | } | |
7424 | ||
91c24f0a DC |
7425 | /* Read a partial die corresponding to an enumeration type. */ |
7426 | ||
72bf9492 DJ |
7427 | static void |
7428 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7429 | struct dwarf2_cu *cu) | |
91c24f0a | 7430 | { |
72bf9492 | 7431 | struct partial_die_info *pdi; |
91c24f0a DC |
7432 | |
7433 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7434 | add_partial_symbol (enum_pdi, cu); |
7435 | ||
7436 | pdi = enum_pdi->die_child; | |
7437 | while (pdi) | |
91c24f0a | 7438 | { |
72bf9492 | 7439 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7440 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7441 | else |
72bf9492 DJ |
7442 | add_partial_symbol (pdi, cu); |
7443 | pdi = pdi->die_sibling; | |
91c24f0a | 7444 | } |
91c24f0a DC |
7445 | } |
7446 | ||
6caca83c CC |
7447 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7448 | ||
7449 | static unsigned int | |
d521ce57 | 7450 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7451 | { |
7452 | unsigned int bytes_read; | |
7453 | ||
7454 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7455 | } | |
7456 | ||
4bb7a0a7 DJ |
7457 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7458 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7459 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7460 | the initial number. */ | |
7461 | ||
7462 | static struct abbrev_info * | |
d521ce57 | 7463 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7464 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7465 | { |
7466 | bfd *abfd = cu->objfile->obfd; | |
7467 | unsigned int abbrev_number; | |
7468 | struct abbrev_info *abbrev; | |
7469 | ||
7470 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7471 | ||
7472 | if (abbrev_number == 0) | |
7473 | return NULL; | |
7474 | ||
433df2d4 | 7475 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7476 | if (!abbrev) |
7477 | { | |
422b9917 DE |
7478 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7479 | " at offset 0x%x [in module %s]"), | |
7480 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 7481 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
7482 | } |
7483 | ||
7484 | return abbrev; | |
7485 | } | |
7486 | ||
93311388 DE |
7487 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7488 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7489 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7490 | ||
d521ce57 TT |
7491 | static const gdb_byte * |
7492 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7493 | { |
dee91e82 | 7494 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7495 | struct abbrev_info *abbrev; |
7496 | unsigned int bytes_read; | |
7497 | ||
7498 | while (1) | |
7499 | { | |
7500 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7501 | if (abbrev == NULL) | |
7502 | return info_ptr + bytes_read; | |
7503 | else | |
dee91e82 | 7504 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7505 | } |
7506 | } | |
7507 | ||
93311388 DE |
7508 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7509 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7510 | abbrev corresponding to that skipped uleb128 should be passed in |
7511 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7512 | children. */ | |
7513 | ||
d521ce57 TT |
7514 | static const gdb_byte * |
7515 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7516 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7517 | { |
7518 | unsigned int bytes_read; | |
7519 | struct attribute attr; | |
dee91e82 DE |
7520 | bfd *abfd = reader->abfd; |
7521 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7522 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7523 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
7524 | unsigned int form, i; |
7525 | ||
7526 | for (i = 0; i < abbrev->num_attrs; i++) | |
7527 | { | |
7528 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7529 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7530 | { | |
dee91e82 | 7531 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7532 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7533 | complaint (&symfile_complaints, |
7534 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7535 | else |
b9502d3f | 7536 | { |
9c541725 PA |
7537 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
7538 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
7539 | |
7540 | if (sibling_ptr < info_ptr) | |
7541 | complaint (&symfile_complaints, | |
7542 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7543 | else if (sibling_ptr > reader->buffer_end) |
7544 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7545 | else |
7546 | return sibling_ptr; | |
7547 | } | |
4bb7a0a7 DJ |
7548 | } |
7549 | ||
7550 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7551 | form = abbrev->attrs[i].form; | |
7552 | skip_attribute: | |
7553 | switch (form) | |
7554 | { | |
4bb7a0a7 | 7555 | case DW_FORM_ref_addr: |
ae411497 TT |
7556 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7557 | and later it is offset sized. */ | |
7558 | if (cu->header.version == 2) | |
7559 | info_ptr += cu->header.addr_size; | |
7560 | else | |
7561 | info_ptr += cu->header.offset_size; | |
7562 | break; | |
36586728 TT |
7563 | case DW_FORM_GNU_ref_alt: |
7564 | info_ptr += cu->header.offset_size; | |
7565 | break; | |
ae411497 | 7566 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7567 | info_ptr += cu->header.addr_size; |
7568 | break; | |
7569 | case DW_FORM_data1: | |
7570 | case DW_FORM_ref1: | |
7571 | case DW_FORM_flag: | |
7572 | info_ptr += 1; | |
7573 | break; | |
2dc7f7b3 | 7574 | case DW_FORM_flag_present: |
43988095 | 7575 | case DW_FORM_implicit_const: |
2dc7f7b3 | 7576 | break; |
4bb7a0a7 DJ |
7577 | case DW_FORM_data2: |
7578 | case DW_FORM_ref2: | |
7579 | info_ptr += 2; | |
7580 | break; | |
7581 | case DW_FORM_data4: | |
7582 | case DW_FORM_ref4: | |
7583 | info_ptr += 4; | |
7584 | break; | |
7585 | case DW_FORM_data8: | |
7586 | case DW_FORM_ref8: | |
55f1336d | 7587 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7588 | info_ptr += 8; |
7589 | break; | |
0224619f JK |
7590 | case DW_FORM_data16: |
7591 | info_ptr += 16; | |
7592 | break; | |
4bb7a0a7 | 7593 | case DW_FORM_string: |
9b1c24c8 | 7594 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7595 | info_ptr += bytes_read; |
7596 | break; | |
2dc7f7b3 | 7597 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7598 | case DW_FORM_strp: |
36586728 | 7599 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7600 | info_ptr += cu->header.offset_size; |
7601 | break; | |
2dc7f7b3 | 7602 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7603 | case DW_FORM_block: |
7604 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7605 | info_ptr += bytes_read; | |
7606 | break; | |
7607 | case DW_FORM_block1: | |
7608 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7609 | break; | |
7610 | case DW_FORM_block2: | |
7611 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7612 | break; | |
7613 | case DW_FORM_block4: | |
7614 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7615 | break; | |
7616 | case DW_FORM_sdata: | |
7617 | case DW_FORM_udata: | |
7618 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7619 | case DW_FORM_GNU_addr_index: |
7620 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7621 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7622 | break; |
7623 | case DW_FORM_indirect: | |
7624 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7625 | info_ptr += bytes_read; | |
7626 | /* We need to continue parsing from here, so just go back to | |
7627 | the top. */ | |
7628 | goto skip_attribute; | |
7629 | ||
7630 | default: | |
3e43a32a MS |
7631 | error (_("Dwarf Error: Cannot handle %s " |
7632 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7633 | dwarf_form_name (form), |
7634 | bfd_get_filename (abfd)); | |
7635 | } | |
7636 | } | |
7637 | ||
7638 | if (abbrev->has_children) | |
dee91e82 | 7639 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7640 | else |
7641 | return info_ptr; | |
7642 | } | |
7643 | ||
93311388 | 7644 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7645 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7646 | |
d521ce57 | 7647 | static const gdb_byte * |
dee91e82 DE |
7648 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7649 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7650 | const gdb_byte *info_ptr) |
91c24f0a DC |
7651 | { |
7652 | /* Do we know the sibling already? */ | |
72bf9492 | 7653 | |
91c24f0a DC |
7654 | if (orig_pdi->sibling) |
7655 | return orig_pdi->sibling; | |
7656 | ||
7657 | /* Are there any children to deal with? */ | |
7658 | ||
7659 | if (!orig_pdi->has_children) | |
7660 | return info_ptr; | |
7661 | ||
4bb7a0a7 | 7662 | /* Skip the children the long way. */ |
91c24f0a | 7663 | |
dee91e82 | 7664 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7665 | } |
7666 | ||
257e7a09 | 7667 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7668 | not NULL. */ |
c906108c SS |
7669 | |
7670 | static void | |
257e7a09 YQ |
7671 | dwarf2_read_symtab (struct partial_symtab *self, |
7672 | struct objfile *objfile) | |
c906108c | 7673 | { |
257e7a09 | 7674 | if (self->readin) |
c906108c | 7675 | { |
442e4d9c | 7676 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7677 | self->filename); |
442e4d9c YQ |
7678 | } |
7679 | else | |
7680 | { | |
7681 | if (info_verbose) | |
c906108c | 7682 | { |
442e4d9c | 7683 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7684 | self->filename); |
442e4d9c | 7685 | gdb_flush (gdb_stdout); |
c906108c | 7686 | } |
c906108c | 7687 | |
442e4d9c | 7688 | /* Restore our global data. */ |
9a3c8263 SM |
7689 | dwarf2_per_objfile |
7690 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7691 | dwarf2_objfile_data_key); | |
10b3939b | 7692 | |
442e4d9c YQ |
7693 | /* If this psymtab is constructed from a debug-only objfile, the |
7694 | has_section_at_zero flag will not necessarily be correct. We | |
7695 | can get the correct value for this flag by looking at the data | |
7696 | associated with the (presumably stripped) associated objfile. */ | |
7697 | if (objfile->separate_debug_objfile_backlink) | |
7698 | { | |
7699 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7700 | = ((struct dwarf2_per_objfile *) |
7701 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7702 | dwarf2_objfile_data_key)); | |
9a619af0 | 7703 | |
442e4d9c YQ |
7704 | dwarf2_per_objfile->has_section_at_zero |
7705 | = dpo_backlink->has_section_at_zero; | |
7706 | } | |
b2ab525c | 7707 | |
442e4d9c | 7708 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7709 | |
257e7a09 | 7710 | psymtab_to_symtab_1 (self); |
c906108c | 7711 | |
442e4d9c YQ |
7712 | /* Finish up the debug error message. */ |
7713 | if (info_verbose) | |
7714 | printf_filtered (_("done.\n")); | |
c906108c | 7715 | } |
95554aad TT |
7716 | |
7717 | process_cu_includes (); | |
c906108c | 7718 | } |
9cdd5dbd DE |
7719 | \f |
7720 | /* Reading in full CUs. */ | |
c906108c | 7721 | |
10b3939b DJ |
7722 | /* Add PER_CU to the queue. */ |
7723 | ||
7724 | static void | |
95554aad TT |
7725 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7726 | enum language pretend_language) | |
10b3939b DJ |
7727 | { |
7728 | struct dwarf2_queue_item *item; | |
7729 | ||
7730 | per_cu->queued = 1; | |
8d749320 | 7731 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7732 | item->per_cu = per_cu; |
95554aad | 7733 | item->pretend_language = pretend_language; |
10b3939b DJ |
7734 | item->next = NULL; |
7735 | ||
7736 | if (dwarf2_queue == NULL) | |
7737 | dwarf2_queue = item; | |
7738 | else | |
7739 | dwarf2_queue_tail->next = item; | |
7740 | ||
7741 | dwarf2_queue_tail = item; | |
7742 | } | |
7743 | ||
89e63ee4 DE |
7744 | /* If PER_CU is not yet queued, add it to the queue. |
7745 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7746 | dependency. | |
0907af0c | 7747 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7748 | meaning either PER_CU is already queued or it is already loaded. |
7749 | ||
7750 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7751 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7752 | |
7753 | static int | |
89e63ee4 | 7754 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7755 | struct dwarf2_per_cu_data *per_cu, |
7756 | enum language pretend_language) | |
7757 | { | |
7758 | /* We may arrive here during partial symbol reading, if we need full | |
7759 | DIEs to process an unusual case (e.g. template arguments). Do | |
7760 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7761 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7762 | { | |
7763 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7764 | return 1; | |
7765 | return 0; | |
7766 | } | |
7767 | ||
7768 | /* Mark the dependence relation so that we don't flush PER_CU | |
7769 | too early. */ | |
89e63ee4 DE |
7770 | if (dependent_cu != NULL) |
7771 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7772 | |
7773 | /* If it's already on the queue, we have nothing to do. */ | |
7774 | if (per_cu->queued) | |
7775 | return 0; | |
7776 | ||
7777 | /* If the compilation unit is already loaded, just mark it as | |
7778 | used. */ | |
7779 | if (per_cu->cu != NULL) | |
7780 | { | |
7781 | per_cu->cu->last_used = 0; | |
7782 | return 0; | |
7783 | } | |
7784 | ||
7785 | /* Add it to the queue. */ | |
7786 | queue_comp_unit (per_cu, pretend_language); | |
7787 | ||
7788 | return 1; | |
7789 | } | |
7790 | ||
10b3939b DJ |
7791 | /* Process the queue. */ |
7792 | ||
7793 | static void | |
a0f42c21 | 7794 | process_queue (void) |
10b3939b DJ |
7795 | { |
7796 | struct dwarf2_queue_item *item, *next_item; | |
7797 | ||
b4f54984 | 7798 | if (dwarf_read_debug) |
45cfd468 DE |
7799 | { |
7800 | fprintf_unfiltered (gdb_stdlog, | |
7801 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7802 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7803 | } |
7804 | ||
03dd20cc DJ |
7805 | /* The queue starts out with one item, but following a DIE reference |
7806 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7807 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7808 | { | |
cc12ce38 DE |
7809 | if ((dwarf2_per_objfile->using_index |
7810 | ? !item->per_cu->v.quick->compunit_symtab | |
7811 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7812 | /* Skip dummy CUs. */ | |
7813 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7814 | { |
7815 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7816 | unsigned int debug_print_threshold; |
247f5c4f | 7817 | char buf[100]; |
f4dc4d17 | 7818 | |
247f5c4f | 7819 | if (per_cu->is_debug_types) |
f4dc4d17 | 7820 | { |
247f5c4f DE |
7821 | struct signatured_type *sig_type = |
7822 | (struct signatured_type *) per_cu; | |
7823 | ||
7824 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 7825 | hex_string (sig_type->signature), |
9c541725 | 7826 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
7827 | /* There can be 100s of TUs. |
7828 | Only print them in verbose mode. */ | |
7829 | debug_print_threshold = 2; | |
f4dc4d17 | 7830 | } |
247f5c4f | 7831 | else |
73be47f5 | 7832 | { |
9c541725 PA |
7833 | sprintf (buf, "CU at offset 0x%x", |
7834 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
7835 | debug_print_threshold = 1; |
7836 | } | |
247f5c4f | 7837 | |
b4f54984 | 7838 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7839 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7840 | |
7841 | if (per_cu->is_debug_types) | |
7842 | process_full_type_unit (per_cu, item->pretend_language); | |
7843 | else | |
7844 | process_full_comp_unit (per_cu, item->pretend_language); | |
7845 | ||
b4f54984 | 7846 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7847 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7848 | } |
10b3939b DJ |
7849 | |
7850 | item->per_cu->queued = 0; | |
7851 | next_item = item->next; | |
7852 | xfree (item); | |
7853 | } | |
7854 | ||
7855 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7856 | |
b4f54984 | 7857 | if (dwarf_read_debug) |
45cfd468 DE |
7858 | { |
7859 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7860 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7861 | } |
10b3939b DJ |
7862 | } |
7863 | ||
7864 | /* Free all allocated queue entries. This function only releases anything if | |
7865 | an error was thrown; if the queue was processed then it would have been | |
7866 | freed as we went along. */ | |
7867 | ||
7868 | static void | |
7869 | dwarf2_release_queue (void *dummy) | |
7870 | { | |
7871 | struct dwarf2_queue_item *item, *last; | |
7872 | ||
7873 | item = dwarf2_queue; | |
7874 | while (item) | |
7875 | { | |
7876 | /* Anything still marked queued is likely to be in an | |
7877 | inconsistent state, so discard it. */ | |
7878 | if (item->per_cu->queued) | |
7879 | { | |
7880 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7881 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7882 | item->per_cu->queued = 0; |
7883 | } | |
7884 | ||
7885 | last = item; | |
7886 | item = item->next; | |
7887 | xfree (last); | |
7888 | } | |
7889 | ||
7890 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7891 | } | |
7892 | ||
7893 | /* Read in full symbols for PST, and anything it depends on. */ | |
7894 | ||
c906108c | 7895 | static void |
fba45db2 | 7896 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7897 | { |
10b3939b | 7898 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7899 | int i; |
7900 | ||
95554aad TT |
7901 | if (pst->readin) |
7902 | return; | |
7903 | ||
aaa75496 | 7904 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7905 | if (!pst->dependencies[i]->readin |
7906 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7907 | { |
7908 | /* Inform about additional files that need to be read in. */ | |
7909 | if (info_verbose) | |
7910 | { | |
a3f17187 | 7911 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7912 | fputs_filtered (" ", gdb_stdout); |
7913 | wrap_here (""); | |
7914 | fputs_filtered ("and ", gdb_stdout); | |
7915 | wrap_here (""); | |
7916 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7917 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7918 | gdb_flush (gdb_stdout); |
7919 | } | |
7920 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7921 | } | |
7922 | ||
9a3c8263 | 7923 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7924 | |
7925 | if (per_cu == NULL) | |
aaa75496 JB |
7926 | { |
7927 | /* It's an include file, no symbols to read for it. | |
7928 | Everything is in the parent symtab. */ | |
7929 | pst->readin = 1; | |
7930 | return; | |
7931 | } | |
c906108c | 7932 | |
a0f42c21 | 7933 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7934 | } |
7935 | ||
dee91e82 DE |
7936 | /* Trivial hash function for die_info: the hash value of a DIE |
7937 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7938 | |
dee91e82 DE |
7939 | static hashval_t |
7940 | die_hash (const void *item) | |
10b3939b | 7941 | { |
9a3c8263 | 7942 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7943 | |
9c541725 | 7944 | return to_underlying (die->sect_off); |
dee91e82 | 7945 | } |
63d06c5c | 7946 | |
dee91e82 DE |
7947 | /* Trivial comparison function for die_info structures: two DIEs |
7948 | are equal if they have the same offset. */ | |
98bfdba5 | 7949 | |
dee91e82 DE |
7950 | static int |
7951 | die_eq (const void *item_lhs, const void *item_rhs) | |
7952 | { | |
9a3c8263 SM |
7953 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7954 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7955 | |
9c541725 | 7956 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 7957 | } |
c906108c | 7958 | |
dee91e82 DE |
7959 | /* die_reader_func for load_full_comp_unit. |
7960 | This is identical to read_signatured_type_reader, | |
7961 | but is kept separate for now. */ | |
c906108c | 7962 | |
dee91e82 DE |
7963 | static void |
7964 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7965 | const gdb_byte *info_ptr, |
dee91e82 DE |
7966 | struct die_info *comp_unit_die, |
7967 | int has_children, | |
7968 | void *data) | |
7969 | { | |
7970 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7971 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7972 | |
dee91e82 DE |
7973 | gdb_assert (cu->die_hash == NULL); |
7974 | cu->die_hash = | |
7975 | htab_create_alloc_ex (cu->header.length / 12, | |
7976 | die_hash, | |
7977 | die_eq, | |
7978 | NULL, | |
7979 | &cu->comp_unit_obstack, | |
7980 | hashtab_obstack_allocate, | |
7981 | dummy_obstack_deallocate); | |
e142c38c | 7982 | |
dee91e82 DE |
7983 | if (has_children) |
7984 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7985 | &info_ptr, comp_unit_die); | |
7986 | cu->dies = comp_unit_die; | |
7987 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7988 | |
7989 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7990 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7991 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7992 | or we won't be able to build types correctly. |
7993 | Similarly, if we do not read the producer, we can not apply | |
7994 | producer-specific interpretation. */ | |
95554aad | 7995 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7996 | } |
10b3939b | 7997 | |
dee91e82 | 7998 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7999 | |
dee91e82 | 8000 | static void |
95554aad TT |
8001 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8002 | enum language pretend_language) | |
dee91e82 | 8003 | { |
3019eac3 | 8004 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8005 | |
f4dc4d17 DE |
8006 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8007 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8008 | } |
8009 | ||
3da10d80 KS |
8010 | /* Add a DIE to the delayed physname list. */ |
8011 | ||
8012 | static void | |
8013 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8014 | const char *name, struct die_info *die, | |
8015 | struct dwarf2_cu *cu) | |
8016 | { | |
8017 | struct delayed_method_info mi; | |
8018 | mi.type = type; | |
8019 | mi.fnfield_index = fnfield_index; | |
8020 | mi.index = index; | |
8021 | mi.name = name; | |
8022 | mi.die = die; | |
8023 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8024 | } | |
8025 | ||
8026 | /* A cleanup for freeing the delayed method list. */ | |
8027 | ||
8028 | static void | |
8029 | free_delayed_list (void *ptr) | |
8030 | { | |
8031 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8032 | if (cu->method_list != NULL) | |
8033 | { | |
8034 | VEC_free (delayed_method_info, cu->method_list); | |
8035 | cu->method_list = NULL; | |
8036 | } | |
8037 | } | |
8038 | ||
3693fdb3 PA |
8039 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8040 | "const" / "volatile". If so, decrements LEN by the length of the | |
8041 | modifier and return true. Otherwise return false. */ | |
8042 | ||
8043 | template<size_t N> | |
8044 | static bool | |
8045 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8046 | { | |
8047 | size_t mod_len = sizeof (mod) - 1; | |
8048 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8049 | { | |
8050 | len -= mod_len; | |
8051 | return true; | |
8052 | } | |
8053 | return false; | |
8054 | } | |
8055 | ||
3da10d80 KS |
8056 | /* Compute the physnames of any methods on the CU's method list. |
8057 | ||
8058 | The computation of method physnames is delayed in order to avoid the | |
8059 | (bad) condition that one of the method's formal parameters is of an as yet | |
8060 | incomplete type. */ | |
8061 | ||
8062 | static void | |
8063 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8064 | { | |
8065 | int i; | |
8066 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8067 | |
8068 | /* Only C++ delays computing physnames. */ | |
8069 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8070 | return; | |
8071 | gdb_assert (cu->language == language_cplus); | |
8072 | ||
3da10d80 KS |
8073 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8074 | { | |
1d06ead6 | 8075 | const char *physname; |
3da10d80 KS |
8076 | struct fn_fieldlist *fn_flp |
8077 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8078 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8079 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8080 | = physname ? physname : ""; | |
3693fdb3 PA |
8081 | |
8082 | /* Since there's no tag to indicate whether a method is a | |
8083 | const/volatile overload, extract that information out of the | |
8084 | demangled name. */ | |
8085 | if (physname != NULL) | |
8086 | { | |
8087 | size_t len = strlen (physname); | |
8088 | ||
8089 | while (1) | |
8090 | { | |
8091 | if (physname[len] == ')') /* shortcut */ | |
8092 | break; | |
8093 | else if (check_modifier (physname, len, " const")) | |
8094 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8095 | else if (check_modifier (physname, len, " volatile")) | |
8096 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8097 | else | |
8098 | break; | |
8099 | } | |
8100 | } | |
3da10d80 KS |
8101 | } |
8102 | } | |
8103 | ||
a766d390 DE |
8104 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8105 | and it's not clear if/how imported objects will appear. | |
8106 | To keep Go support simple until that's worked out, | |
8107 | go back through what we've read and create something usable. | |
8108 | We could do this while processing each DIE, and feels kinda cleaner, | |
8109 | but that way is more invasive. | |
8110 | This is to, for example, allow the user to type "p var" or "b main" | |
8111 | without having to specify the package name, and allow lookups | |
8112 | of module.object to work in contexts that use the expression | |
8113 | parser. */ | |
8114 | ||
8115 | static void | |
8116 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8117 | { | |
8118 | char *package_name = NULL; | |
8119 | struct pending *list; | |
8120 | int i; | |
8121 | ||
8122 | for (list = global_symbols; list != NULL; list = list->next) | |
8123 | { | |
8124 | for (i = 0; i < list->nsyms; ++i) | |
8125 | { | |
8126 | struct symbol *sym = list->symbol[i]; | |
8127 | ||
8128 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8129 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8130 | { | |
8131 | char *this_package_name = go_symbol_package_name (sym); | |
8132 | ||
8133 | if (this_package_name == NULL) | |
8134 | continue; | |
8135 | if (package_name == NULL) | |
8136 | package_name = this_package_name; | |
8137 | else | |
8138 | { | |
8139 | if (strcmp (package_name, this_package_name) != 0) | |
8140 | complaint (&symfile_complaints, | |
8141 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8142 | (symbol_symtab (sym) != NULL |
8143 | ? symtab_to_filename_for_display | |
8144 | (symbol_symtab (sym)) | |
4262abfb | 8145 | : objfile_name (cu->objfile)), |
a766d390 DE |
8146 | this_package_name, package_name); |
8147 | xfree (this_package_name); | |
8148 | } | |
8149 | } | |
8150 | } | |
8151 | } | |
8152 | ||
8153 | if (package_name != NULL) | |
8154 | { | |
8155 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8156 | const char *saved_package_name |
224c3ddb SM |
8157 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8158 | package_name, | |
8159 | strlen (package_name)); | |
19f392bc UW |
8160 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8161 | saved_package_name); | |
a766d390 DE |
8162 | struct symbol *sym; |
8163 | ||
8164 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8165 | ||
e623cf5d | 8166 | sym = allocate_symbol (objfile); |
f85f34ed | 8167 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8168 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8169 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8170 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8171 | e.g., "main" finds the "main" module and not C's main(). */ | |
8172 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8173 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8174 | SYMBOL_TYPE (sym) = type; |
8175 | ||
8176 | add_symbol_to_list (sym, &global_symbols); | |
8177 | ||
8178 | xfree (package_name); | |
8179 | } | |
8180 | } | |
8181 | ||
95554aad TT |
8182 | /* Return the symtab for PER_CU. This works properly regardless of |
8183 | whether we're using the index or psymtabs. */ | |
8184 | ||
43f3e411 DE |
8185 | static struct compunit_symtab * |
8186 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8187 | { |
8188 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8189 | ? per_cu->v.quick->compunit_symtab |
8190 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8191 | } |
8192 | ||
8193 | /* A helper function for computing the list of all symbol tables | |
8194 | included by PER_CU. */ | |
8195 | ||
8196 | static void | |
43f3e411 | 8197 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 8198 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 8199 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 8200 | struct compunit_symtab *immediate_parent) |
95554aad TT |
8201 | { |
8202 | void **slot; | |
8203 | int ix; | |
43f3e411 | 8204 | struct compunit_symtab *cust; |
95554aad TT |
8205 | struct dwarf2_per_cu_data *iter; |
8206 | ||
8207 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
8208 | if (*slot != NULL) | |
8209 | { | |
8210 | /* This inclusion and its children have been processed. */ | |
8211 | return; | |
8212 | } | |
8213 | ||
8214 | *slot = per_cu; | |
8215 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
8216 | cust = get_compunit_symtab (per_cu); |
8217 | if (cust != NULL) | |
ec94af83 DE |
8218 | { |
8219 | /* If this is a type unit only add its symbol table if we haven't | |
8220 | seen it yet (type unit per_cu's can share symtabs). */ | |
8221 | if (per_cu->is_debug_types) | |
8222 | { | |
43f3e411 | 8223 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
8224 | if (*slot == NULL) |
8225 | { | |
43f3e411 DE |
8226 | *slot = cust; |
8227 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
8228 | if (cust->user == NULL) | |
8229 | cust->user = immediate_parent; | |
ec94af83 DE |
8230 | } |
8231 | } | |
8232 | else | |
f9125b6c | 8233 | { |
43f3e411 DE |
8234 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
8235 | if (cust->user == NULL) | |
8236 | cust->user = immediate_parent; | |
f9125b6c | 8237 | } |
ec94af83 | 8238 | } |
95554aad TT |
8239 | |
8240 | for (ix = 0; | |
796a7ff8 | 8241 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 8242 | ++ix) |
ec94af83 DE |
8243 | { |
8244 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 8245 | all_type_symtabs, iter, cust); |
ec94af83 | 8246 | } |
95554aad TT |
8247 | } |
8248 | ||
43f3e411 | 8249 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
8250 | PER_CU. */ |
8251 | ||
8252 | static void | |
43f3e411 | 8253 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 8254 | { |
f4dc4d17 DE |
8255 | gdb_assert (! per_cu->is_debug_types); |
8256 | ||
796a7ff8 | 8257 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
8258 | { |
8259 | int ix, len; | |
ec94af83 | 8260 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
8261 | struct compunit_symtab *compunit_symtab_iter; |
8262 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 8263 | htab_t all_children, all_type_symtabs; |
43f3e411 | 8264 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
8265 | |
8266 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 8267 | if (cust == NULL) |
95554aad TT |
8268 | return; |
8269 | ||
8270 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
8271 | NULL, xcalloc, xfree); | |
ec94af83 DE |
8272 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
8273 | NULL, xcalloc, xfree); | |
95554aad TT |
8274 | |
8275 | for (ix = 0; | |
796a7ff8 | 8276 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 8277 | ix, per_cu_iter); |
95554aad | 8278 | ++ix) |
ec94af83 DE |
8279 | { |
8280 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 8281 | all_type_symtabs, per_cu_iter, |
43f3e411 | 8282 | cust); |
ec94af83 | 8283 | } |
95554aad | 8284 | |
ec94af83 | 8285 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
8286 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
8287 | cust->includes | |
8d749320 SM |
8288 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
8289 | struct compunit_symtab *, len + 1); | |
95554aad | 8290 | for (ix = 0; |
43f3e411 DE |
8291 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8292 | compunit_symtab_iter); | |
95554aad | 8293 | ++ix) |
43f3e411 DE |
8294 | cust->includes[ix] = compunit_symtab_iter; |
8295 | cust->includes[len] = NULL; | |
95554aad | 8296 | |
43f3e411 | 8297 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8298 | htab_delete (all_children); |
ec94af83 | 8299 | htab_delete (all_type_symtabs); |
95554aad TT |
8300 | } |
8301 | } | |
8302 | ||
8303 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8304 | read. */ | |
8305 | ||
8306 | static void | |
8307 | process_cu_includes (void) | |
8308 | { | |
8309 | int ix; | |
8310 | struct dwarf2_per_cu_data *iter; | |
8311 | ||
8312 | for (ix = 0; | |
8313 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8314 | ix, iter); | |
8315 | ++ix) | |
f4dc4d17 DE |
8316 | { |
8317 | if (! iter->is_debug_types) | |
43f3e411 | 8318 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8319 | } |
95554aad TT |
8320 | |
8321 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8322 | } | |
8323 | ||
9cdd5dbd | 8324 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8325 | already been loaded into memory. */ |
8326 | ||
8327 | static void | |
95554aad TT |
8328 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8329 | enum language pretend_language) | |
10b3939b | 8330 | { |
10b3939b | 8331 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8332 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8333 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8334 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8335 | struct compunit_symtab *cust; |
3da10d80 | 8336 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 8337 | CORE_ADDR baseaddr; |
4359dff1 | 8338 | struct block *static_block; |
3e29f34a | 8339 | CORE_ADDR addr; |
10b3939b DJ |
8340 | |
8341 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8342 | ||
10b3939b DJ |
8343 | buildsym_init (); |
8344 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 8345 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8346 | |
8347 | cu->list_in_scope = &file_symbols; | |
c906108c | 8348 | |
95554aad TT |
8349 | cu->language = pretend_language; |
8350 | cu->language_defn = language_def (cu->language); | |
8351 | ||
c906108c | 8352 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8353 | process_die (cu->dies, cu); |
c906108c | 8354 | |
a766d390 DE |
8355 | /* For now fudge the Go package. */ |
8356 | if (cu->language == language_go) | |
8357 | fixup_go_packaging (cu); | |
8358 | ||
3da10d80 KS |
8359 | /* Now that we have processed all the DIEs in the CU, all the types |
8360 | should be complete, and it should now be safe to compute all of the | |
8361 | physnames. */ | |
8362 | compute_delayed_physnames (cu); | |
8363 | do_cleanups (delayed_list_cleanup); | |
8364 | ||
fae299cd DC |
8365 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8366 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8367 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8368 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8369 | |
3e29f34a MR |
8370 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8371 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8372 | |
8373 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8374 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8375 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8376 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8377 | this comp unit. */ | |
8378 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8379 | ||
43f3e411 DE |
8380 | cust = end_symtab_from_static_block (static_block, |
8381 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8382 | |
43f3e411 | 8383 | if (cust != NULL) |
c906108c | 8384 | { |
df15bd07 | 8385 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8386 | |
8be455d7 JK |
8387 | /* Set symtab language to language from DW_AT_language. If the |
8388 | compilation is from a C file generated by language preprocessors, do | |
8389 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8390 | if (!(cu->language == language_c |
40e3ad0e | 8391 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8392 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8393 | |
8394 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8395 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8396 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8397 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8398 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8399 | |
8400 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8401 | needed, it would be wrong due to missing DW_AT_producer there. | |
8402 | ||
8403 | Still one can confuse GDB by using non-standard GCC compilation | |
8404 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8405 | */ | |
ab260dad | 8406 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8407 | cust->locations_valid = 1; |
e0d00bc7 JK |
8408 | |
8409 | if (gcc_4_minor >= 5) | |
43f3e411 | 8410 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8411 | |
43f3e411 | 8412 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8413 | } |
9291a0cd TT |
8414 | |
8415 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8416 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8417 | else |
8418 | { | |
8419 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8420 | pst->compunit_symtab = cust; |
9291a0cd TT |
8421 | pst->readin = 1; |
8422 | } | |
c906108c | 8423 | |
95554aad TT |
8424 | /* Push it for inclusion processing later. */ |
8425 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8426 | ||
c906108c | 8427 | do_cleanups (back_to); |
f4dc4d17 | 8428 | } |
45cfd468 | 8429 | |
f4dc4d17 DE |
8430 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8431 | already been loaded into memory. */ | |
8432 | ||
8433 | static void | |
8434 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8435 | enum language pretend_language) | |
8436 | { | |
8437 | struct dwarf2_cu *cu = per_cu->cu; | |
8438 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8439 | struct compunit_symtab *cust; |
f4dc4d17 | 8440 | struct cleanup *back_to, *delayed_list_cleanup; |
0186c6a7 DE |
8441 | struct signatured_type *sig_type; |
8442 | ||
8443 | gdb_assert (per_cu->is_debug_types); | |
8444 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8445 | |
8446 | buildsym_init (); | |
8447 | back_to = make_cleanup (really_free_pendings, NULL); | |
8448 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8449 | ||
8450 | cu->list_in_scope = &file_symbols; | |
8451 | ||
8452 | cu->language = pretend_language; | |
8453 | cu->language_defn = language_def (cu->language); | |
8454 | ||
8455 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8456 | process_die (cu->dies, cu); | |
8457 | ||
8458 | /* For now fudge the Go package. */ | |
8459 | if (cu->language == language_go) | |
8460 | fixup_go_packaging (cu); | |
8461 | ||
8462 | /* Now that we have processed all the DIEs in the CU, all the types | |
8463 | should be complete, and it should now be safe to compute all of the | |
8464 | physnames. */ | |
8465 | compute_delayed_physnames (cu); | |
8466 | do_cleanups (delayed_list_cleanup); | |
8467 | ||
8468 | /* TUs share symbol tables. | |
8469 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8470 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8471 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8472 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8473 | { |
43f3e411 DE |
8474 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8475 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8476 | |
43f3e411 | 8477 | if (cust != NULL) |
f4dc4d17 DE |
8478 | { |
8479 | /* Set symtab language to language from DW_AT_language. If the | |
8480 | compilation is from a C file generated by language preprocessors, | |
8481 | do not set the language if it was already deduced by | |
8482 | start_subfile. */ | |
43f3e411 DE |
8483 | if (!(cu->language == language_c |
8484 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8485 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8486 | } |
8487 | } | |
8488 | else | |
8489 | { | |
0ab9ce85 | 8490 | augment_type_symtab (); |
43f3e411 | 8491 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8492 | } |
8493 | ||
8494 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8495 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8496 | else |
8497 | { | |
8498 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8499 | pst->compunit_symtab = cust; |
f4dc4d17 | 8500 | pst->readin = 1; |
45cfd468 | 8501 | } |
f4dc4d17 DE |
8502 | |
8503 | do_cleanups (back_to); | |
c906108c SS |
8504 | } |
8505 | ||
95554aad TT |
8506 | /* Process an imported unit DIE. */ |
8507 | ||
8508 | static void | |
8509 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8510 | { | |
8511 | struct attribute *attr; | |
8512 | ||
f4dc4d17 DE |
8513 | /* For now we don't handle imported units in type units. */ |
8514 | if (cu->per_cu->is_debug_types) | |
8515 | { | |
8516 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8517 | " supported in type units [in module %s]"), | |
4262abfb | 8518 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8519 | } |
8520 | ||
95554aad TT |
8521 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8522 | if (attr != NULL) | |
8523 | { | |
9c541725 PA |
8524 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
8525 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
8526 | dwarf2_per_cu_data *per_cu | |
8527 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 8528 | |
69d751e3 | 8529 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8530 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8531 | load_full_comp_unit (per_cu, cu->language); | |
8532 | ||
796a7ff8 | 8533 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8534 | per_cu); |
8535 | } | |
8536 | } | |
8537 | ||
4c8aa72d PA |
8538 | /* RAII object that represents a process_die scope: i.e., |
8539 | starts/finishes processing a DIE. */ | |
8540 | class process_die_scope | |
adde2bff | 8541 | { |
4c8aa72d PA |
8542 | public: |
8543 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
8544 | : m_die (die), m_cu (cu) | |
8545 | { | |
8546 | /* We should only be processing DIEs not already in process. */ | |
8547 | gdb_assert (!m_die->in_process); | |
8548 | m_die->in_process = true; | |
8549 | } | |
8c3cb9fa | 8550 | |
4c8aa72d PA |
8551 | ~process_die_scope () |
8552 | { | |
8553 | m_die->in_process = false; | |
8554 | ||
8555 | /* If we're done processing the DIE for the CU that owns the line | |
8556 | header, we don't need the line header anymore. */ | |
8557 | if (m_cu->line_header_die_owner == m_die) | |
8558 | { | |
8559 | delete m_cu->line_header; | |
8560 | m_cu->line_header = NULL; | |
8561 | m_cu->line_header_die_owner = NULL; | |
8562 | } | |
8563 | } | |
8564 | ||
8565 | private: | |
8566 | die_info *m_die; | |
8567 | dwarf2_cu *m_cu; | |
8568 | }; | |
adde2bff | 8569 | |
c906108c SS |
8570 | /* Process a die and its children. */ |
8571 | ||
8572 | static void | |
e7c27a73 | 8573 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8574 | { |
4c8aa72d | 8575 | process_die_scope scope (die, cu); |
adde2bff | 8576 | |
c906108c SS |
8577 | switch (die->tag) |
8578 | { | |
8579 | case DW_TAG_padding: | |
8580 | break; | |
8581 | case DW_TAG_compile_unit: | |
95554aad | 8582 | case DW_TAG_partial_unit: |
e7c27a73 | 8583 | read_file_scope (die, cu); |
c906108c | 8584 | break; |
348e048f DE |
8585 | case DW_TAG_type_unit: |
8586 | read_type_unit_scope (die, cu); | |
8587 | break; | |
c906108c | 8588 | case DW_TAG_subprogram: |
c906108c | 8589 | case DW_TAG_inlined_subroutine: |
edb3359d | 8590 | read_func_scope (die, cu); |
c906108c SS |
8591 | break; |
8592 | case DW_TAG_lexical_block: | |
14898363 L |
8593 | case DW_TAG_try_block: |
8594 | case DW_TAG_catch_block: | |
e7c27a73 | 8595 | read_lexical_block_scope (die, cu); |
c906108c | 8596 | break; |
216f72a1 | 8597 | case DW_TAG_call_site: |
96408a79 SA |
8598 | case DW_TAG_GNU_call_site: |
8599 | read_call_site_scope (die, cu); | |
8600 | break; | |
c906108c | 8601 | case DW_TAG_class_type: |
680b30c7 | 8602 | case DW_TAG_interface_type: |
c906108c SS |
8603 | case DW_TAG_structure_type: |
8604 | case DW_TAG_union_type: | |
134d01f1 | 8605 | process_structure_scope (die, cu); |
c906108c SS |
8606 | break; |
8607 | case DW_TAG_enumeration_type: | |
134d01f1 | 8608 | process_enumeration_scope (die, cu); |
c906108c | 8609 | break; |
134d01f1 | 8610 | |
f792889a DJ |
8611 | /* These dies have a type, but processing them does not create |
8612 | a symbol or recurse to process the children. Therefore we can | |
8613 | read them on-demand through read_type_die. */ | |
c906108c | 8614 | case DW_TAG_subroutine_type: |
72019c9c | 8615 | case DW_TAG_set_type: |
c906108c | 8616 | case DW_TAG_array_type: |
c906108c | 8617 | case DW_TAG_pointer_type: |
c906108c | 8618 | case DW_TAG_ptr_to_member_type: |
c906108c | 8619 | case DW_TAG_reference_type: |
4297a3f0 | 8620 | case DW_TAG_rvalue_reference_type: |
c906108c | 8621 | case DW_TAG_string_type: |
c906108c | 8622 | break; |
134d01f1 | 8623 | |
c906108c | 8624 | case DW_TAG_base_type: |
a02abb62 | 8625 | case DW_TAG_subrange_type: |
cb249c71 | 8626 | case DW_TAG_typedef: |
134d01f1 DJ |
8627 | /* Add a typedef symbol for the type definition, if it has a |
8628 | DW_AT_name. */ | |
f792889a | 8629 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8630 | break; |
c906108c | 8631 | case DW_TAG_common_block: |
e7c27a73 | 8632 | read_common_block (die, cu); |
c906108c SS |
8633 | break; |
8634 | case DW_TAG_common_inclusion: | |
8635 | break; | |
d9fa45fe | 8636 | case DW_TAG_namespace: |
4d4ec4e5 | 8637 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8638 | read_namespace (die, cu); |
d9fa45fe | 8639 | break; |
5d7cb8df | 8640 | case DW_TAG_module: |
4d4ec4e5 | 8641 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8642 | read_module (die, cu); |
8643 | break; | |
d9fa45fe | 8644 | case DW_TAG_imported_declaration: |
74921315 KS |
8645 | cu->processing_has_namespace_info = 1; |
8646 | if (read_namespace_alias (die, cu)) | |
8647 | break; | |
8648 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8649 | case DW_TAG_imported_module: |
4d4ec4e5 | 8650 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8651 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8652 | || cu->language != language_fortran)) | |
8653 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8654 | dwarf_tag_name (die->tag)); | |
8655 | read_import_statement (die, cu); | |
d9fa45fe | 8656 | break; |
95554aad TT |
8657 | |
8658 | case DW_TAG_imported_unit: | |
8659 | process_imported_unit_die (die, cu); | |
8660 | break; | |
8661 | ||
c906108c | 8662 | default: |
e7c27a73 | 8663 | new_symbol (die, NULL, cu); |
c906108c SS |
8664 | break; |
8665 | } | |
8666 | } | |
ca69b9e6 DE |
8667 | \f |
8668 | /* DWARF name computation. */ | |
c906108c | 8669 | |
94af9270 KS |
8670 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8671 | needs to have the name of the scope prepended to the name listed in the | |
8672 | die. */ | |
8673 | ||
8674 | static int | |
8675 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8676 | { | |
1c809c68 TT |
8677 | struct attribute *attr; |
8678 | ||
94af9270 KS |
8679 | switch (die->tag) |
8680 | { | |
8681 | case DW_TAG_namespace: | |
8682 | case DW_TAG_typedef: | |
8683 | case DW_TAG_class_type: | |
8684 | case DW_TAG_interface_type: | |
8685 | case DW_TAG_structure_type: | |
8686 | case DW_TAG_union_type: | |
8687 | case DW_TAG_enumeration_type: | |
8688 | case DW_TAG_enumerator: | |
8689 | case DW_TAG_subprogram: | |
08a76f8a | 8690 | case DW_TAG_inlined_subroutine: |
94af9270 | 8691 | case DW_TAG_member: |
74921315 | 8692 | case DW_TAG_imported_declaration: |
94af9270 KS |
8693 | return 1; |
8694 | ||
8695 | case DW_TAG_variable: | |
c2b0a229 | 8696 | case DW_TAG_constant: |
94af9270 KS |
8697 | /* We only need to prefix "globally" visible variables. These include |
8698 | any variable marked with DW_AT_external or any variable that | |
8699 | lives in a namespace. [Variables in anonymous namespaces | |
8700 | require prefixing, but they are not DW_AT_external.] */ | |
8701 | ||
8702 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8703 | { | |
8704 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8705 | |
94af9270 KS |
8706 | return die_needs_namespace (die_specification (die, &spec_cu), |
8707 | spec_cu); | |
8708 | } | |
8709 | ||
1c809c68 | 8710 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8711 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8712 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8713 | return 0; |
8714 | /* A variable in a lexical block of some kind does not need a | |
8715 | namespace, even though in C++ such variables may be external | |
8716 | and have a mangled name. */ | |
8717 | if (die->parent->tag == DW_TAG_lexical_block | |
8718 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8719 | || die->parent->tag == DW_TAG_catch_block |
8720 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8721 | return 0; |
8722 | return 1; | |
94af9270 KS |
8723 | |
8724 | default: | |
8725 | return 0; | |
8726 | } | |
8727 | } | |
8728 | ||
73b9be8b KS |
8729 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
8730 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8731 | defined for the given DIE. */ | |
8732 | ||
8733 | static struct attribute * | |
8734 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
8735 | { | |
8736 | struct attribute *attr; | |
8737 | ||
8738 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8739 | if (attr == NULL) | |
8740 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8741 | ||
8742 | return attr; | |
8743 | } | |
8744 | ||
8745 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
8746 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8747 | defined for the given DIE. */ | |
8748 | ||
8749 | static const char * | |
8750 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
8751 | { | |
8752 | const char *linkage_name; | |
8753 | ||
8754 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
8755 | if (linkage_name == NULL) | |
8756 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8757 | ||
8758 | return linkage_name; | |
8759 | } | |
8760 | ||
94af9270 | 8761 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 8762 | compute the physname for the object, which include a method's: |
9c37b5ae | 8763 | - formal parameters (C++), |
a766d390 | 8764 | - receiver type (Go), |
a766d390 DE |
8765 | |
8766 | The term "physname" is a bit confusing. | |
8767 | For C++, for example, it is the demangled name. | |
8768 | For Go, for example, it's the mangled name. | |
94af9270 | 8769 | |
af6b7be1 JB |
8770 | For Ada, return the DIE's linkage name rather than the fully qualified |
8771 | name. PHYSNAME is ignored.. | |
8772 | ||
94af9270 KS |
8773 | The result is allocated on the objfile_obstack and canonicalized. */ |
8774 | ||
8775 | static const char * | |
15d034d0 TT |
8776 | dwarf2_compute_name (const char *name, |
8777 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8778 | int physname) |
8779 | { | |
bb5ed363 DE |
8780 | struct objfile *objfile = cu->objfile; |
8781 | ||
94af9270 KS |
8782 | if (name == NULL) |
8783 | name = dwarf2_name (die, cu); | |
8784 | ||
2ee7123e DE |
8785 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8786 | but otherwise compute it by typename_concat inside GDB. | |
8787 | FIXME: Actually this is not really true, or at least not always true. | |
8788 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8789 | Fortran names because there is no mangling standard. So new_symbol_full | |
8790 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8791 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8792 | if (cu->language == language_ada |
8793 | || (cu->language == language_fortran && physname)) | |
8794 | { | |
8795 | /* For Ada unit, we prefer the linkage name over the name, as | |
8796 | the former contains the exported name, which the user expects | |
8797 | to be able to reference. Ideally, we want the user to be able | |
8798 | to reference this entity using either natural or linkage name, | |
8799 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 8800 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 8801 | |
2ee7123e DE |
8802 | if (linkage_name != NULL) |
8803 | return linkage_name; | |
f55ee35c JK |
8804 | } |
8805 | ||
94af9270 KS |
8806 | /* These are the only languages we know how to qualify names in. */ |
8807 | if (name != NULL | |
9c37b5ae | 8808 | && (cu->language == language_cplus |
c44af4eb TT |
8809 | || cu->language == language_fortran || cu->language == language_d |
8810 | || cu->language == language_rust)) | |
94af9270 KS |
8811 | { |
8812 | if (die_needs_namespace (die, cu)) | |
8813 | { | |
8814 | long length; | |
0d5cff50 | 8815 | const char *prefix; |
34a68019 | 8816 | const char *canonical_name = NULL; |
94af9270 | 8817 | |
d7e74731 PA |
8818 | string_file buf; |
8819 | ||
94af9270 | 8820 | prefix = determine_prefix (die, cu); |
94af9270 KS |
8821 | if (*prefix != '\0') |
8822 | { | |
f55ee35c JK |
8823 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8824 | physname, cu); | |
9a619af0 | 8825 | |
d7e74731 | 8826 | buf.puts (prefixed_name); |
94af9270 KS |
8827 | xfree (prefixed_name); |
8828 | } | |
8829 | else | |
d7e74731 | 8830 | buf.puts (name); |
94af9270 | 8831 | |
98bfdba5 PA |
8832 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8833 | as children with DW_TAG_template_type_param or | |
8834 | DW_TAG_value_type_param. If the latter, add them to the name | |
8835 | here. If the name already has template parameters, then | |
8836 | skip this step; some versions of GCC emit both, and | |
8837 | it is more efficient to use the pre-computed name. | |
8838 | ||
8839 | Something to keep in mind about this process: it is very | |
8840 | unlikely, or in some cases downright impossible, to produce | |
8841 | something that will match the mangled name of a function. | |
8842 | If the definition of the function has the same debug info, | |
8843 | we should be able to match up with it anyway. But fallbacks | |
8844 | using the minimal symbol, for instance to find a method | |
8845 | implemented in a stripped copy of libstdc++, will not work. | |
8846 | If we do not have debug info for the definition, we will have to | |
8847 | match them up some other way. | |
8848 | ||
8849 | When we do name matching there is a related problem with function | |
8850 | templates; two instantiated function templates are allowed to | |
8851 | differ only by their return types, which we do not add here. */ | |
8852 | ||
8853 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8854 | { | |
8855 | struct attribute *attr; | |
8856 | struct die_info *child; | |
8857 | int first = 1; | |
8858 | ||
8859 | die->building_fullname = 1; | |
8860 | ||
8861 | for (child = die->child; child != NULL; child = child->sibling) | |
8862 | { | |
8863 | struct type *type; | |
12df843f | 8864 | LONGEST value; |
d521ce57 | 8865 | const gdb_byte *bytes; |
98bfdba5 PA |
8866 | struct dwarf2_locexpr_baton *baton; |
8867 | struct value *v; | |
8868 | ||
8869 | if (child->tag != DW_TAG_template_type_param | |
8870 | && child->tag != DW_TAG_template_value_param) | |
8871 | continue; | |
8872 | ||
8873 | if (first) | |
8874 | { | |
d7e74731 | 8875 | buf.puts ("<"); |
98bfdba5 PA |
8876 | first = 0; |
8877 | } | |
8878 | else | |
d7e74731 | 8879 | buf.puts (", "); |
98bfdba5 PA |
8880 | |
8881 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8882 | if (attr == NULL) | |
8883 | { | |
8884 | complaint (&symfile_complaints, | |
8885 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 8886 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
8887 | continue; |
8888 | } | |
8889 | type = die_type (child, cu); | |
8890 | ||
8891 | if (child->tag == DW_TAG_template_type_param) | |
8892 | { | |
d7e74731 | 8893 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8894 | continue; |
8895 | } | |
8896 | ||
8897 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8898 | if (attr == NULL) | |
8899 | { | |
8900 | complaint (&symfile_complaints, | |
3e43a32a MS |
8901 | _("template parameter missing " |
8902 | "DW_AT_const_value")); | |
d7e74731 | 8903 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
8904 | continue; |
8905 | } | |
8906 | ||
8907 | dwarf2_const_value_attr (attr, type, name, | |
8908 | &cu->comp_unit_obstack, cu, | |
8909 | &value, &bytes, &baton); | |
8910 | ||
8911 | if (TYPE_NOSIGN (type)) | |
8912 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8913 | changed, this can use value_print instead. */ | |
d7e74731 | 8914 | c_printchar (value, type, &buf); |
98bfdba5 PA |
8915 | else |
8916 | { | |
8917 | struct value_print_options opts; | |
8918 | ||
8919 | if (baton != NULL) | |
8920 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8921 | baton->data, | |
8922 | baton->size, | |
8923 | baton->per_cu); | |
8924 | else if (bytes != NULL) | |
8925 | { | |
8926 | v = allocate_value (type); | |
8927 | memcpy (value_contents_writeable (v), bytes, | |
8928 | TYPE_LENGTH (type)); | |
8929 | } | |
8930 | else | |
8931 | v = value_from_longest (type, value); | |
8932 | ||
3e43a32a MS |
8933 | /* Specify decimal so that we do not depend on |
8934 | the radix. */ | |
98bfdba5 PA |
8935 | get_formatted_print_options (&opts, 'd'); |
8936 | opts.raw = 1; | |
d7e74731 | 8937 | value_print (v, &buf, &opts); |
98bfdba5 PA |
8938 | release_value (v); |
8939 | value_free (v); | |
8940 | } | |
8941 | } | |
8942 | ||
8943 | die->building_fullname = 0; | |
8944 | ||
8945 | if (!first) | |
8946 | { | |
8947 | /* Close the argument list, with a space if necessary | |
8948 | (nested templates). */ | |
d7e74731 PA |
8949 | if (!buf.empty () && buf.string ().back () == '>') |
8950 | buf.puts (" >"); | |
98bfdba5 | 8951 | else |
d7e74731 | 8952 | buf.puts (">"); |
98bfdba5 PA |
8953 | } |
8954 | } | |
8955 | ||
9c37b5ae | 8956 | /* For C++ methods, append formal parameter type |
94af9270 | 8957 | information, if PHYSNAME. */ |
6e70227d | 8958 | |
94af9270 | 8959 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 8960 | && cu->language == language_cplus) |
94af9270 KS |
8961 | { |
8962 | struct type *type = read_type_die (die, cu); | |
8963 | ||
d7e74731 | 8964 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 8965 | &type_print_raw_options); |
94af9270 | 8966 | |
9c37b5ae | 8967 | if (cu->language == language_cplus) |
94af9270 | 8968 | { |
60430eff DJ |
8969 | /* Assume that an artificial first parameter is |
8970 | "this", but do not crash if it is not. RealView | |
8971 | marks unnamed (and thus unused) parameters as | |
8972 | artificial; there is no way to differentiate | |
8973 | the two cases. */ | |
94af9270 KS |
8974 | if (TYPE_NFIELDS (type) > 0 |
8975 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8976 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8977 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8978 | 0)))) | |
d7e74731 | 8979 | buf.puts (" const"); |
94af9270 KS |
8980 | } |
8981 | } | |
8982 | ||
d7e74731 | 8983 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
8984 | |
8985 | if (cu->language == language_cplus) | |
34a68019 | 8986 | canonical_name |
322a8516 | 8987 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
8988 | &objfile->per_bfd->storage_obstack); |
8989 | ||
8990 | /* If we only computed INTERMEDIATE_NAME, or if | |
8991 | INTERMEDIATE_NAME is already canonical, then we need to | |
8992 | copy it to the appropriate obstack. */ | |
322a8516 | 8993 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
8994 | name = ((const char *) |
8995 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
8996 | intermediate_name.c_str (), |
8997 | intermediate_name.length ())); | |
34a68019 TT |
8998 | else |
8999 | name = canonical_name; | |
94af9270 KS |
9000 | } |
9001 | } | |
9002 | ||
9003 | return name; | |
9004 | } | |
9005 | ||
0114d602 DJ |
9006 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9007 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9008 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9009 | not have a name. NAME may either be from a previous call to |
9010 | dwarf2_name or NULL. | |
9011 | ||
9c37b5ae | 9012 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9013 | |
9014 | static const char * | |
15d034d0 | 9015 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9016 | { |
94af9270 KS |
9017 | return dwarf2_compute_name (name, die, cu, 0); |
9018 | } | |
0114d602 | 9019 | |
94af9270 KS |
9020 | /* Construct a physname for the given DIE in CU. NAME may either be |
9021 | from a previous call to dwarf2_name or NULL. The result will be | |
9022 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9023 | name. | |
0114d602 | 9024 | |
9c37b5ae | 9025 | The output string will be canonicalized (if C++). */ |
0114d602 | 9026 | |
94af9270 | 9027 | static const char * |
15d034d0 | 9028 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9029 | { |
bb5ed363 | 9030 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
9031 | const char *retval, *mangled = NULL, *canon = NULL; |
9032 | struct cleanup *back_to; | |
9033 | int need_copy = 1; | |
9034 | ||
9035 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9036 | on its own. */ | |
9037 | if (!die_needs_namespace (die, cu)) | |
9038 | return dwarf2_compute_name (name, die, cu, 1); | |
9039 | ||
9040 | back_to = make_cleanup (null_cleanup, NULL); | |
9041 | ||
73b9be8b | 9042 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9043 | |
e98c9e7c TT |
9044 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9045 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9046 | if (cu->language == language_rust && mangled != NULL | |
9047 | && strchr (mangled, '{') != NULL) | |
9048 | mangled = NULL; | |
9049 | ||
900e11f9 JK |
9050 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9051 | has computed. */ | |
7d45c7c3 | 9052 | if (mangled != NULL) |
900e11f9 JK |
9053 | { |
9054 | char *demangled; | |
9055 | ||
900e11f9 JK |
9056 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9057 | type. It is easier for GDB users to search for such functions as | |
9058 | `name(params)' than `long name(params)'. In such case the minimal | |
9059 | symbol names do not match the full symbol names but for template | |
9060 | functions there is never a need to look up their definition from their | |
9061 | declaration so the only disadvantage remains the minimal symbol | |
9062 | variant `long name(params)' does not have the proper inferior type. | |
9063 | */ | |
9064 | ||
a766d390 DE |
9065 | if (cu->language == language_go) |
9066 | { | |
9067 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9068 | new_symbol_full assumes we return the mangled name. | |
9069 | This just undoes that lie until things are cleaned up. */ | |
9070 | demangled = NULL; | |
9071 | } | |
9072 | else | |
9073 | { | |
8de20a37 | 9074 | demangled = gdb_demangle (mangled, |
9c37b5ae | 9075 | (DMGL_PARAMS | DMGL_ANSI | DMGL_RET_DROP)); |
a766d390 | 9076 | } |
900e11f9 JK |
9077 | if (demangled) |
9078 | { | |
9079 | make_cleanup (xfree, demangled); | |
9080 | canon = demangled; | |
9081 | } | |
9082 | else | |
9083 | { | |
9084 | canon = mangled; | |
9085 | need_copy = 0; | |
9086 | } | |
9087 | } | |
9088 | ||
9089 | if (canon == NULL || check_physname) | |
9090 | { | |
9091 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9092 | ||
9093 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9094 | { | |
9095 | /* It may not mean a bug in GDB. The compiler could also | |
9096 | compute DW_AT_linkage_name incorrectly. But in such case | |
9097 | GDB would need to be bug-to-bug compatible. */ | |
9098 | ||
9099 | complaint (&symfile_complaints, | |
9100 | _("Computed physname <%s> does not match demangled <%s> " | |
9101 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9102 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9103 | objfile_name (objfile)); |
900e11f9 JK |
9104 | |
9105 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9106 | is available here - over computed PHYSNAME. It is safer | |
9107 | against both buggy GDB and buggy compilers. */ | |
9108 | ||
9109 | retval = canon; | |
9110 | } | |
9111 | else | |
9112 | { | |
9113 | retval = physname; | |
9114 | need_copy = 0; | |
9115 | } | |
9116 | } | |
9117 | else | |
9118 | retval = canon; | |
9119 | ||
9120 | if (need_copy) | |
224c3ddb SM |
9121 | retval = ((const char *) |
9122 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9123 | retval, strlen (retval))); | |
900e11f9 JK |
9124 | |
9125 | do_cleanups (back_to); | |
9126 | return retval; | |
0114d602 DJ |
9127 | } |
9128 | ||
74921315 KS |
9129 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9130 | a new symbol for it. | |
9131 | ||
9132 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9133 | ||
9134 | static int | |
9135 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9136 | { | |
9137 | struct attribute *attr; | |
9138 | ||
9139 | /* If the die does not have a name, this is not a namespace | |
9140 | alias. */ | |
9141 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9142 | if (attr != NULL) | |
9143 | { | |
9144 | int num; | |
9145 | struct die_info *d = die; | |
9146 | struct dwarf2_cu *imported_cu = cu; | |
9147 | ||
9148 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9149 | keep inspecting DIEs until we hit the underlying import. */ | |
9150 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9151 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9152 | { | |
9153 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9154 | if (attr == NULL) | |
9155 | break; | |
9156 | ||
9157 | d = follow_die_ref (d, attr, &imported_cu); | |
9158 | if (d->tag != DW_TAG_imported_declaration) | |
9159 | break; | |
9160 | } | |
9161 | ||
9162 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9163 | { | |
9164 | complaint (&symfile_complaints, | |
9165 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9166 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9167 | return 0; |
9168 | } | |
9169 | ||
9170 | if (attr != NULL) | |
9171 | { | |
9172 | struct type *type; | |
9c541725 | 9173 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9174 | |
9c541725 | 9175 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9176 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9177 | { | |
9178 | /* This declaration is a global namespace alias. Add | |
9179 | a symbol for it whose type is the aliased namespace. */ | |
9180 | new_symbol (die, type, cu); | |
9181 | return 1; | |
9182 | } | |
9183 | } | |
9184 | } | |
9185 | ||
9186 | return 0; | |
9187 | } | |
9188 | ||
22cee43f PMR |
9189 | /* Return the using directives repository (global or local?) to use in the |
9190 | current context for LANGUAGE. | |
9191 | ||
9192 | For Ada, imported declarations can materialize renamings, which *may* be | |
9193 | global. However it is impossible (for now?) in DWARF to distinguish | |
9194 | "external" imported declarations and "static" ones. As all imported | |
9195 | declarations seem to be static in all other languages, make them all CU-wide | |
9196 | global only in Ada. */ | |
9197 | ||
9198 | static struct using_direct ** | |
9199 | using_directives (enum language language) | |
9200 | { | |
9201 | if (language == language_ada && context_stack_depth == 0) | |
9202 | return &global_using_directives; | |
9203 | else | |
9204 | return &local_using_directives; | |
9205 | } | |
9206 | ||
27aa8d6a SW |
9207 | /* Read the import statement specified by the given die and record it. */ |
9208 | ||
9209 | static void | |
9210 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
9211 | { | |
bb5ed363 | 9212 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 9213 | struct attribute *import_attr; |
32019081 | 9214 | struct die_info *imported_die, *child_die; |
de4affc9 | 9215 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 9216 | const char *imported_name; |
794684b6 | 9217 | const char *imported_name_prefix; |
13387711 SW |
9218 | const char *canonical_name; |
9219 | const char *import_alias; | |
9220 | const char *imported_declaration = NULL; | |
794684b6 | 9221 | const char *import_prefix; |
eb1e02fd | 9222 | std::vector<const char *> excludes; |
13387711 | 9223 | |
27aa8d6a SW |
9224 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
9225 | if (import_attr == NULL) | |
9226 | { | |
9227 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9228 | dwarf_tag_name (die->tag)); | |
9229 | return; | |
9230 | } | |
9231 | ||
de4affc9 CC |
9232 | imported_cu = cu; |
9233 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
9234 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
9235 | if (imported_name == NULL) |
9236 | { | |
9237 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
9238 | ||
9239 | The import in the following code: | |
9240 | namespace A | |
9241 | { | |
9242 | typedef int B; | |
9243 | } | |
9244 | ||
9245 | int main () | |
9246 | { | |
9247 | using A::B; | |
9248 | B b; | |
9249 | return b; | |
9250 | } | |
9251 | ||
9252 | ... | |
9253 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
9254 | <52> DW_AT_decl_file : 1 | |
9255 | <53> DW_AT_decl_line : 6 | |
9256 | <54> DW_AT_import : <0x75> | |
9257 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
9258 | <59> DW_AT_name : B | |
9259 | <5b> DW_AT_decl_file : 1 | |
9260 | <5c> DW_AT_decl_line : 2 | |
9261 | <5d> DW_AT_type : <0x6e> | |
9262 | ... | |
9263 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
9264 | <76> DW_AT_byte_size : 4 | |
9265 | <77> DW_AT_encoding : 5 (signed) | |
9266 | ||
9267 | imports the wrong die ( 0x75 instead of 0x58 ). | |
9268 | This case will be ignored until the gcc bug is fixed. */ | |
9269 | return; | |
9270 | } | |
9271 | ||
82856980 SW |
9272 | /* Figure out the local name after import. */ |
9273 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 9274 | |
794684b6 SW |
9275 | /* Figure out where the statement is being imported to. */ |
9276 | import_prefix = determine_prefix (die, cu); | |
9277 | ||
9278 | /* Figure out what the scope of the imported die is and prepend it | |
9279 | to the name of the imported die. */ | |
de4affc9 | 9280 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 9281 | |
f55ee35c JK |
9282 | if (imported_die->tag != DW_TAG_namespace |
9283 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 9284 | { |
13387711 SW |
9285 | imported_declaration = imported_name; |
9286 | canonical_name = imported_name_prefix; | |
794684b6 | 9287 | } |
13387711 | 9288 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 9289 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
9290 | imported_name_prefix, |
9291 | (cu->language == language_d ? "." : "::"), | |
9292 | imported_name, (char *) NULL); | |
13387711 SW |
9293 | else |
9294 | canonical_name = imported_name; | |
794684b6 | 9295 | |
32019081 JK |
9296 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
9297 | for (child_die = die->child; child_die && child_die->tag; | |
9298 | child_die = sibling_die (child_die)) | |
9299 | { | |
9300 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
9301 | represented by an imported module entry with an import attribute | |
9302 | referring to the module and owned entries corresponding to those | |
9303 | entities that are renamed as part of being imported. */ | |
9304 | ||
9305 | if (child_die->tag != DW_TAG_imported_declaration) | |
9306 | { | |
9307 | complaint (&symfile_complaints, | |
9308 | _("child DW_TAG_imported_declaration expected " | |
9309 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 9310 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9311 | continue; |
9312 | } | |
9313 | ||
9314 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9315 | if (import_attr == NULL) | |
9316 | { | |
9317 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9318 | dwarf_tag_name (child_die->tag)); | |
9319 | continue; | |
9320 | } | |
9321 | ||
9322 | imported_cu = cu; | |
9323 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9324 | &imported_cu); | |
9325 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9326 | if (imported_name == NULL) | |
9327 | { | |
9328 | complaint (&symfile_complaints, | |
9329 | _("child DW_TAG_imported_declaration has unknown " | |
9330 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 9331 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9332 | continue; |
9333 | } | |
9334 | ||
eb1e02fd | 9335 | excludes.push_back (imported_name); |
32019081 JK |
9336 | |
9337 | process_die (child_die, cu); | |
9338 | } | |
9339 | ||
22cee43f PMR |
9340 | add_using_directive (using_directives (cu->language), |
9341 | import_prefix, | |
9342 | canonical_name, | |
9343 | import_alias, | |
9344 | imported_declaration, | |
9345 | excludes, | |
9346 | 0, | |
9347 | &objfile->objfile_obstack); | |
27aa8d6a SW |
9348 | } |
9349 | ||
1b80a9fa JK |
9350 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9351 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9352 | this, it was first present in GCC release 4.3.0. */ | |
9353 | ||
9354 | static int | |
9355 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9356 | { | |
9357 | if (!cu->checked_producer) | |
9358 | check_producer (cu); | |
9359 | ||
9360 | return cu->producer_is_gcc_lt_4_3; | |
9361 | } | |
9362 | ||
d721ba37 PA |
9363 | static file_and_directory |
9364 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 9365 | { |
d721ba37 PA |
9366 | file_and_directory res; |
9367 | ||
9291a0cd TT |
9368 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9369 | is not a source language identifier. */ | |
d721ba37 PA |
9370 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
9371 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9372 | |
d721ba37 PA |
9373 | if (res.comp_dir == NULL |
9374 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
9375 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 9376 | { |
d721ba37 PA |
9377 | res.comp_dir_storage = ldirname (res.name); |
9378 | if (!res.comp_dir_storage.empty ()) | |
9379 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 9380 | } |
d721ba37 | 9381 | if (res.comp_dir != NULL) |
9291a0cd TT |
9382 | { |
9383 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9384 | directory, get rid of it. */ | |
d721ba37 | 9385 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 9386 | |
d721ba37 PA |
9387 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
9388 | res.comp_dir = cp + 1; | |
9291a0cd TT |
9389 | } |
9390 | ||
d721ba37 PA |
9391 | if (res.name == NULL) |
9392 | res.name = "<unknown>"; | |
9393 | ||
9394 | return res; | |
9291a0cd TT |
9395 | } |
9396 | ||
f4dc4d17 DE |
9397 | /* Handle DW_AT_stmt_list for a compilation unit. |
9398 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9399 | COMP_DIR is the compilation directory. LOWPC is passed to |
9400 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9401 | |
9402 | static void | |
9403 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9404 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9405 | { |
527f3840 | 9406 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9407 | struct attribute *attr; |
527f3840 JK |
9408 | struct line_header line_header_local; |
9409 | hashval_t line_header_local_hash; | |
9410 | unsigned u; | |
9411 | void **slot; | |
9412 | int decode_mapping; | |
2ab95328 | 9413 | |
f4dc4d17 DE |
9414 | gdb_assert (! cu->per_cu->is_debug_types); |
9415 | ||
2ab95328 | 9416 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9417 | if (attr == NULL) |
9418 | return; | |
9419 | ||
9c541725 | 9420 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
9421 | |
9422 | /* The line header hash table is only created if needed (it exists to | |
9423 | prevent redundant reading of the line table for partial_units). | |
9424 | If we're given a partial_unit, we'll need it. If we're given a | |
9425 | compile_unit, then use the line header hash table if it's already | |
9426 | created, but don't create one just yet. */ | |
9427 | ||
9428 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9429 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9430 | { |
527f3840 JK |
9431 | dwarf2_per_objfile->line_header_hash |
9432 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9433 | line_header_eq_voidp, | |
9434 | free_line_header_voidp, | |
9435 | &objfile->objfile_obstack, | |
9436 | hashtab_obstack_allocate, | |
9437 | dummy_obstack_deallocate); | |
9438 | } | |
2ab95328 | 9439 | |
9c541725 | 9440 | line_header_local.sect_off = line_offset; |
527f3840 JK |
9441 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
9442 | line_header_local_hash = line_header_hash (&line_header_local); | |
9443 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9444 | { | |
9445 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9446 | &line_header_local, | |
9447 | line_header_local_hash, NO_INSERT); | |
9448 | ||
9449 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9450 | is not present in *SLOT (since if there is something in *SLOT then | |
9451 | it will be for a partial_unit). */ | |
9452 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9453 | { |
527f3840 | 9454 | gdb_assert (*slot != NULL); |
9a3c8263 | 9455 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9456 | return; |
dee91e82 | 9457 | } |
2ab95328 | 9458 | } |
527f3840 JK |
9459 | |
9460 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9461 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
9462 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
9463 | if (lh == NULL) | |
527f3840 | 9464 | return; |
4c8aa72d PA |
9465 | |
9466 | cu->line_header = lh.release (); | |
9467 | cu->line_header_die_owner = die; | |
527f3840 JK |
9468 | |
9469 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9470 | slot = NULL; | |
9471 | else | |
9472 | { | |
9473 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9474 | &line_header_local, | |
9475 | line_header_local_hash, INSERT); | |
9476 | gdb_assert (slot != NULL); | |
9477 | } | |
9478 | if (slot != NULL && *slot == NULL) | |
9479 | { | |
9480 | /* This newly decoded line number information unit will be owned | |
9481 | by line_header_hash hash table. */ | |
9482 | *slot = cu->line_header; | |
4c8aa72d | 9483 | cu->line_header_die_owner = NULL; |
527f3840 JK |
9484 | } |
9485 | else | |
9486 | { | |
9487 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9488 | may be already used by multiple CUs. Create only temporary decoded | |
9489 | line_header for this CU - it may happen at most once for each line | |
9490 | number information unit. And if we're not using line_header_hash | |
9491 | then this is what we want as well. */ | |
9492 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
9493 | } |
9494 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9495 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9496 | decode_mapping); | |
fff8551c | 9497 | |
2ab95328 TT |
9498 | } |
9499 | ||
95554aad | 9500 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9501 | |
c906108c | 9502 | static void |
e7c27a73 | 9503 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9504 | { |
dee91e82 | 9505 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9506 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 9507 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9508 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9509 | struct attribute *attr; | |
c906108c | 9510 | struct die_info *child_die; |
e142c38c | 9511 | CORE_ADDR baseaddr; |
6e70227d | 9512 | |
e142c38c | 9513 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9514 | |
fae299cd | 9515 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9516 | |
9517 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9518 | from finish_block. */ | |
2acceee2 | 9519 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9520 | lowpc = highpc; |
3e29f34a | 9521 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9522 | |
d721ba37 | 9523 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 9524 | |
95554aad | 9525 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9526 | |
f4b8a18d KW |
9527 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9528 | standardised yet. As a workaround for the language detection we fall | |
9529 | back to the DW_AT_producer string. */ | |
9530 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9531 | cu->language = language_opencl; | |
9532 | ||
3019eac3 DE |
9533 | /* Similar hack for Go. */ |
9534 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9535 | set_cu_language (DW_LANG_Go, cu); | |
9536 | ||
d721ba37 | 9537 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
9538 | |
9539 | /* Decode line number information if present. We do this before | |
9540 | processing child DIEs, so that the line header table is available | |
9541 | for DW_AT_decl_file. */ | |
d721ba37 | 9542 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
9543 | |
9544 | /* Process all dies in compilation unit. */ | |
9545 | if (die->child != NULL) | |
9546 | { | |
9547 | child_die = die->child; | |
9548 | while (child_die && child_die->tag) | |
9549 | { | |
9550 | process_die (child_die, cu); | |
9551 | child_die = sibling_die (child_die); | |
9552 | } | |
9553 | } | |
9554 | ||
9555 | /* Decode macro information, if present. Dwarf 2 macro information | |
9556 | refers to information in the line number info statement program | |
9557 | header, so we can only read it if we've read the header | |
9558 | successfully. */ | |
0af92d60 JK |
9559 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
9560 | if (attr == NULL) | |
9561 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
9562 | if (attr && cu->line_header) |
9563 | { | |
9564 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9565 | complaint (&symfile_complaints, | |
0af92d60 | 9566 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 9567 | |
43f3e411 | 9568 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9569 | } |
9570 | else | |
9571 | { | |
9572 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9573 | if (attr && cu->line_header) | |
9574 | { | |
9575 | unsigned int macro_offset = DW_UNSND (attr); | |
9576 | ||
43f3e411 | 9577 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9578 | } |
9579 | } | |
3019eac3 DE |
9580 | } |
9581 | ||
f4dc4d17 DE |
9582 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9583 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9584 | symtabs with another TU and the symtabs have already been created | |
9585 | then restore those symtabs in the line header. | |
9586 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9587 | |
9588 | static void | |
f4dc4d17 | 9589 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9590 | { |
f4dc4d17 DE |
9591 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
9592 | struct type_unit_group *tu_group; | |
9593 | int first_time; | |
3019eac3 | 9594 | struct attribute *attr; |
9c541725 | 9595 | unsigned int i; |
0186c6a7 | 9596 | struct signatured_type *sig_type; |
3019eac3 | 9597 | |
f4dc4d17 | 9598 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9599 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9600 | |
f4dc4d17 | 9601 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9602 | |
f4dc4d17 | 9603 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9604 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9605 | if (sig_type->type_unit_group == NULL) |
9606 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9607 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9608 | |
9609 | /* If we've already processed this stmt_list there's no real need to | |
9610 | do it again, we could fake it and just recreate the part we need | |
9611 | (file name,index -> symtab mapping). If data shows this optimization | |
9612 | is useful we can do it then. */ | |
43f3e411 | 9613 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9614 | |
9615 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9616 | debug info. */ | |
fff8551c | 9617 | line_header_up lh; |
f4dc4d17 | 9618 | if (attr != NULL) |
3019eac3 | 9619 | { |
9c541725 | 9620 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
9621 | lh = dwarf_decode_line_header (line_offset, cu); |
9622 | } | |
9623 | if (lh == NULL) | |
9624 | { | |
9625 | if (first_time) | |
9626 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9627 | else | |
9628 | { | |
9629 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9630 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9631 | } |
f4dc4d17 | 9632 | return; |
3019eac3 DE |
9633 | } |
9634 | ||
4c8aa72d PA |
9635 | cu->line_header = lh.release (); |
9636 | cu->line_header_die_owner = die; | |
3019eac3 | 9637 | |
f4dc4d17 DE |
9638 | if (first_time) |
9639 | { | |
43f3e411 | 9640 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9641 | |
1fd60fc0 DE |
9642 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9643 | still initializing it, and our caller (a few levels up) | |
9644 | process_full_type_unit still needs to know if this is the first | |
9645 | time. */ | |
9646 | ||
4c8aa72d PA |
9647 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
9648 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
9649 | cu->line_header->file_names.size ()); | |
3019eac3 | 9650 | |
4c8aa72d | 9651 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9652 | { |
4c8aa72d | 9653 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 9654 | |
4c8aa72d | 9655 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 9656 | |
f4dc4d17 DE |
9657 | if (current_subfile->symtab == NULL) |
9658 | { | |
4c8aa72d PA |
9659 | /* NOTE: start_subfile will recognize when it's been |
9660 | passed a file it has already seen. So we can't | |
9661 | assume there's a simple mapping from | |
9662 | cu->line_header->file_names to subfiles, plus | |
9663 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
9664 | current_subfile->symtab |
9665 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9666 | } |
9667 | ||
8c43009f PA |
9668 | fe.symtab = current_subfile->symtab; |
9669 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
9670 | } |
9671 | } | |
9672 | else | |
3019eac3 | 9673 | { |
0ab9ce85 | 9674 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9675 | |
4c8aa72d | 9676 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9677 | { |
4c8aa72d | 9678 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 9679 | |
4c8aa72d | 9680 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 9681 | } |
3019eac3 DE |
9682 | } |
9683 | ||
f4dc4d17 DE |
9684 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9685 | so they don't have a "real" (so to speak) symtab anyway. | |
9686 | There is later code that will assign the main symtab to all symbols | |
9687 | that don't have one. We need to handle the case of a symbol with a | |
9688 | missing symtab (DW_AT_decl_file) anyway. */ | |
9689 | } | |
3019eac3 | 9690 | |
f4dc4d17 DE |
9691 | /* Process DW_TAG_type_unit. |
9692 | For TUs we want to skip the first top level sibling if it's not the | |
9693 | actual type being defined by this TU. In this case the first top | |
9694 | level sibling is there to provide context only. */ | |
3019eac3 | 9695 | |
f4dc4d17 DE |
9696 | static void |
9697 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9698 | { | |
9699 | struct die_info *child_die; | |
3019eac3 | 9700 | |
f4dc4d17 DE |
9701 | prepare_one_comp_unit (cu, die, language_minimal); |
9702 | ||
9703 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9704 | We do this before processing child DIEs, so that the line header table | |
9705 | is available for DW_AT_decl_file. */ | |
9706 | setup_type_unit_groups (die, cu); | |
9707 | ||
9708 | if (die->child != NULL) | |
9709 | { | |
9710 | child_die = die->child; | |
9711 | while (child_die && child_die->tag) | |
9712 | { | |
9713 | process_die (child_die, cu); | |
9714 | child_die = sibling_die (child_die); | |
9715 | } | |
9716 | } | |
3019eac3 DE |
9717 | } |
9718 | \f | |
80626a55 DE |
9719 | /* DWO/DWP files. |
9720 | ||
9721 | http://gcc.gnu.org/wiki/DebugFission | |
9722 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9723 | ||
9724 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9725 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9726 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9727 | |
9728 | static hashval_t | |
9729 | hash_dwo_file (const void *item) | |
9730 | { | |
9a3c8263 | 9731 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9732 | hashval_t hash; |
3019eac3 | 9733 | |
a2ce51a0 DE |
9734 | hash = htab_hash_string (dwo_file->dwo_name); |
9735 | if (dwo_file->comp_dir != NULL) | |
9736 | hash += htab_hash_string (dwo_file->comp_dir); | |
9737 | return hash; | |
3019eac3 DE |
9738 | } |
9739 | ||
9740 | static int | |
9741 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9742 | { | |
9a3c8263 SM |
9743 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9744 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9745 | |
a2ce51a0 DE |
9746 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9747 | return 0; | |
9748 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9749 | return lhs->comp_dir == rhs->comp_dir; | |
9750 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9751 | } |
9752 | ||
9753 | /* Allocate a hash table for DWO files. */ | |
9754 | ||
9755 | static htab_t | |
9756 | allocate_dwo_file_hash_table (void) | |
9757 | { | |
9758 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9759 | ||
9760 | return htab_create_alloc_ex (41, | |
9761 | hash_dwo_file, | |
9762 | eq_dwo_file, | |
9763 | NULL, | |
9764 | &objfile->objfile_obstack, | |
9765 | hashtab_obstack_allocate, | |
9766 | dummy_obstack_deallocate); | |
9767 | } | |
9768 | ||
80626a55 DE |
9769 | /* Lookup DWO file DWO_NAME. */ |
9770 | ||
9771 | static void ** | |
0ac5b59e | 9772 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9773 | { |
9774 | struct dwo_file find_entry; | |
9775 | void **slot; | |
9776 | ||
9777 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9778 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9779 | ||
9780 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9781 | find_entry.dwo_name = dwo_name; |
9782 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9783 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9784 | ||
9785 | return slot; | |
9786 | } | |
9787 | ||
3019eac3 DE |
9788 | static hashval_t |
9789 | hash_dwo_unit (const void *item) | |
9790 | { | |
9a3c8263 | 9791 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9792 | |
9793 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9794 | return dwo_unit->signature; | |
9795 | } | |
9796 | ||
9797 | static int | |
9798 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9799 | { | |
9a3c8263 SM |
9800 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9801 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9802 | |
9803 | /* The signature is assumed to be unique within the DWO file. | |
9804 | So while object file CU dwo_id's always have the value zero, | |
9805 | that's OK, assuming each object file DWO file has only one CU, | |
9806 | and that's the rule for now. */ | |
9807 | return lhs->signature == rhs->signature; | |
9808 | } | |
9809 | ||
9810 | /* Allocate a hash table for DWO CUs,TUs. | |
9811 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9812 | ||
9813 | static htab_t | |
9814 | allocate_dwo_unit_table (struct objfile *objfile) | |
9815 | { | |
9816 | /* Start out with a pretty small number. | |
9817 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9818 | return htab_create_alloc_ex (3, | |
9819 | hash_dwo_unit, | |
9820 | eq_dwo_unit, | |
9821 | NULL, | |
9822 | &objfile->objfile_obstack, | |
9823 | hashtab_obstack_allocate, | |
9824 | dummy_obstack_deallocate); | |
9825 | } | |
9826 | ||
80626a55 | 9827 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9828 | |
19c3d4c9 | 9829 | struct create_dwo_cu_data |
3019eac3 DE |
9830 | { |
9831 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9832 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9833 | }; |
9834 | ||
19c3d4c9 | 9835 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9836 | |
9837 | static void | |
19c3d4c9 DE |
9838 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9839 | const gdb_byte *info_ptr, | |
9840 | struct die_info *comp_unit_die, | |
9841 | int has_children, | |
9842 | void *datap) | |
3019eac3 DE |
9843 | { |
9844 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 9845 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 9846 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9847 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9848 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9849 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9850 | struct attribute *attr; |
3019eac3 DE |
9851 | |
9852 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9853 | if (attr == NULL) | |
9854 | { | |
19c3d4c9 DE |
9855 | complaint (&symfile_complaints, |
9856 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9857 | " its dwo_id [in module %s]"), | |
9c541725 | 9858 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
9859 | return; |
9860 | } | |
9861 | ||
3019eac3 DE |
9862 | dwo_unit->dwo_file = dwo_file; |
9863 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9864 | dwo_unit->section = section; |
9c541725 | 9865 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
9866 | dwo_unit->length = cu->per_cu->length; |
9867 | ||
b4f54984 | 9868 | if (dwarf_read_debug) |
4031ecc5 | 9869 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
9870 | to_underlying (sect_off), |
9871 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9872 | } |
9873 | ||
33c5cd75 | 9874 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 9875 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 9876 | |
33c5cd75 DB |
9877 | static void |
9878 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
9879 | htab_t &cus_htab) | |
3019eac3 DE |
9880 | { |
9881 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 9882 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 9883 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 9884 | |
33c5cd75 DB |
9885 | dwarf2_read_section (objfile, §ion); |
9886 | info_ptr = section.buffer; | |
3019eac3 DE |
9887 | |
9888 | if (info_ptr == NULL) | |
33c5cd75 | 9889 | return; |
3019eac3 | 9890 | |
b4f54984 | 9891 | if (dwarf_read_debug) |
19c3d4c9 DE |
9892 | { |
9893 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
9894 | get_section_name (§ion), |
9895 | get_section_file_name (§ion)); | |
19c3d4c9 | 9896 | } |
3019eac3 | 9897 | |
33c5cd75 | 9898 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
9899 | while (info_ptr < end_ptr) |
9900 | { | |
9901 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
9902 | struct create_dwo_cu_data create_dwo_cu_data; |
9903 | struct dwo_unit *dwo_unit; | |
9904 | void **slot; | |
9905 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 9906 | |
19c3d4c9 DE |
9907 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9908 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9909 | memset (&per_cu, 0, sizeof (per_cu)); |
9910 | per_cu.objfile = objfile; | |
9911 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
9912 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
9913 | per_cu.section = §ion; | |
c5ed0576 | 9914 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
9915 | |
9916 | init_cutu_and_read_dies_no_follow ( | |
9917 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
9918 | info_ptr += per_cu.length; | |
9919 | ||
9920 | // If the unit could not be parsed, skip it. | |
9921 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
9922 | continue; | |
3019eac3 | 9923 | |
33c5cd75 DB |
9924 | if (cus_htab == NULL) |
9925 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 9926 | |
33c5cd75 DB |
9927 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
9928 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9929 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
9930 | gdb_assert (slot != NULL); | |
9931 | if (*slot != NULL) | |
19c3d4c9 | 9932 | { |
33c5cd75 DB |
9933 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
9934 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 9935 | |
33c5cd75 DB |
9936 | complaint (&symfile_complaints, |
9937 | _("debug cu entry at offset 0x%x is duplicate to" | |
9938 | " the entry at offset 0x%x, signature %s"), | |
9939 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
9940 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 9941 | } |
33c5cd75 | 9942 | *slot = (void *)dwo_unit; |
3019eac3 | 9943 | } |
3019eac3 DE |
9944 | } |
9945 | ||
80626a55 DE |
9946 | /* DWP file .debug_{cu,tu}_index section format: |
9947 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9948 | ||
d2415c6c DE |
9949 | DWP Version 1: |
9950 | ||
80626a55 DE |
9951 | Both index sections have the same format, and serve to map a 64-bit |
9952 | signature to a set of section numbers. Each section begins with a header, | |
9953 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9954 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9955 | aligned at 8-byte boundaries in the file. | |
9956 | ||
d2415c6c DE |
9957 | The index section header consists of: |
9958 | ||
9959 | V, 32 bit version number | |
9960 | -, 32 bits unused | |
9961 | N, 32 bit number of compilation units or type units in the index | |
9962 | M, 32 bit number of slots in the hash table | |
80626a55 | 9963 | |
d2415c6c | 9964 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9965 | |
d2415c6c DE |
9966 | The hash table begins at offset 16 in the section, and consists of an array |
9967 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9968 | order of the application binary). Unused slots in the hash table are 0. | |
9969 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9970 | |
d2415c6c DE |
9971 | The parallel table begins immediately after the hash table |
9972 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9973 | array of 32-bit indexes (using the byte order of the application binary), | |
9974 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9975 | table contains a 32-bit index into the pool of section numbers. For unused | |
9976 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9977 | |
73869dc2 DE |
9978 | The pool of section numbers begins immediately following the hash table |
9979 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9980 | section numbers consists of an array of 32-bit words (using the byte order | |
9981 | of the application binary). Each item in the array is indexed starting | |
9982 | from 0. The hash table entry provides the index of the first section | |
9983 | number in the set. Additional section numbers in the set follow, and the | |
9984 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9985 | ||
9986 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9987 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9988 | be the second entry. Other members of the set may follow in any order. | |
9989 | ||
9990 | --- | |
9991 | ||
9992 | DWP Version 2: | |
9993 | ||
9994 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9995 | and the entries in the index tables are now offsets into these sections. | |
9996 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9997 | section. | |
9998 | ||
9999 | Index Section Contents: | |
10000 | Header | |
10001 | Hash Table of Signatures dwp_hash_table.hash_table | |
10002 | Parallel Table of Indices dwp_hash_table.unit_table | |
10003 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10004 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10005 | ||
10006 | The index section header consists of: | |
10007 | ||
10008 | V, 32 bit version number | |
10009 | L, 32 bit number of columns in the table of section offsets | |
10010 | N, 32 bit number of compilation units or type units in the index | |
10011 | M, 32 bit number of slots in the hash table | |
10012 | ||
10013 | Numbers are recorded using the byte order of the application binary. | |
10014 | ||
10015 | The hash table has the same format as version 1. | |
10016 | The parallel table of indices has the same format as version 1, | |
10017 | except that the entries are origin-1 indices into the table of sections | |
10018 | offsets and the table of section sizes. | |
10019 | ||
10020 | The table of offsets begins immediately following the parallel table | |
10021 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10022 | a two-dimensional array of 32-bit words (using the byte order of the | |
10023 | application binary), with L columns and N+1 rows, in row-major order. | |
10024 | Each row in the array is indexed starting from 0. The first row provides | |
10025 | a key to the remaining rows: each column in this row provides an identifier | |
10026 | for a debug section, and the offsets in the same column of subsequent rows | |
10027 | refer to that section. The section identifiers are: | |
10028 | ||
10029 | DW_SECT_INFO 1 .debug_info.dwo | |
10030 | DW_SECT_TYPES 2 .debug_types.dwo | |
10031 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10032 | DW_SECT_LINE 4 .debug_line.dwo | |
10033 | DW_SECT_LOC 5 .debug_loc.dwo | |
10034 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10035 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10036 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10037 | ||
10038 | The offsets provided by the CU and TU index sections are the base offsets | |
10039 | for the contributions made by each CU or TU to the corresponding section | |
10040 | in the package file. Each CU and TU header contains an abbrev_offset | |
10041 | field, used to find the abbreviations table for that CU or TU within the | |
10042 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10043 | be interpreted as relative to the base offset given in the index section. | |
10044 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10045 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10046 | and offsets into other debug sections obtained from DWARF attributes should | |
10047 | also be interpreted as relative to the corresponding base offset. | |
10048 | ||
10049 | The table of sizes begins immediately following the table of offsets. | |
10050 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10051 | with L columns and N rows, in row-major order. Each row in the array is | |
10052 | indexed starting from 1 (row 0 is shared by the two tables). | |
10053 | ||
10054 | --- | |
10055 | ||
10056 | Hash table lookup is handled the same in version 1 and 2: | |
10057 | ||
10058 | We assume that N and M will not exceed 2^32 - 1. | |
10059 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10060 | ||
d2415c6c DE |
10061 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10062 | in the hash table is located as follows: | |
80626a55 | 10063 | |
d2415c6c DE |
10064 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10065 | the low-order k bits all set to 1. | |
80626a55 | 10066 | |
d2415c6c | 10067 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10068 | |
d2415c6c DE |
10069 | 3) If the hash table entry at index H matches the signature, use that |
10070 | entry. If the hash table entry at index H is unused (all zeroes), | |
10071 | terminate the search: the signature is not present in the table. | |
80626a55 | 10072 | |
d2415c6c | 10073 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10074 | |
d2415c6c | 10075 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10076 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10077 | |
10078 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10079 | .debug_{info,types}.dwo in DWP_FILE. | |
10080 | Returns NULL if there isn't one. | |
10081 | Note: This function processes DWP files only, not DWO files. */ | |
10082 | ||
10083 | static struct dwp_hash_table * | |
10084 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10085 | { | |
10086 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10087 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10088 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10089 | struct dwarf2_section_info *index; |
73869dc2 | 10090 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10091 | struct dwp_hash_table *htab; |
10092 | ||
10093 | if (is_debug_types) | |
10094 | index = &dwp_file->sections.tu_index; | |
10095 | else | |
10096 | index = &dwp_file->sections.cu_index; | |
10097 | ||
10098 | if (dwarf2_section_empty_p (index)) | |
10099 | return NULL; | |
10100 | dwarf2_read_section (objfile, index); | |
10101 | ||
10102 | index_ptr = index->buffer; | |
10103 | index_end = index_ptr + index->size; | |
10104 | ||
10105 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10106 | index_ptr += 4; |
10107 | if (version == 2) | |
10108 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10109 | else | |
10110 | nr_columns = 0; | |
10111 | index_ptr += 4; | |
80626a55 DE |
10112 | nr_units = read_4_bytes (dbfd, index_ptr); |
10113 | index_ptr += 4; | |
10114 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10115 | index_ptr += 4; | |
10116 | ||
73869dc2 | 10117 | if (version != 1 && version != 2) |
80626a55 | 10118 | { |
21aa081e | 10119 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10120 | " [in module %s]"), |
21aa081e | 10121 | pulongest (version), dwp_file->name); |
80626a55 DE |
10122 | } |
10123 | if (nr_slots != (nr_slots & -nr_slots)) | |
10124 | { | |
21aa081e | 10125 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10126 | " is not power of 2 [in module %s]"), |
21aa081e | 10127 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10128 | } |
10129 | ||
10130 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10131 | htab->version = version; |
10132 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10133 | htab->nr_units = nr_units; |
10134 | htab->nr_slots = nr_slots; | |
10135 | htab->hash_table = index_ptr; | |
10136 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10137 | |
10138 | /* Exit early if the table is empty. */ | |
10139 | if (nr_slots == 0 || nr_units == 0 | |
10140 | || (version == 2 && nr_columns == 0)) | |
10141 | { | |
10142 | /* All must be zero. */ | |
10143 | if (nr_slots != 0 || nr_units != 0 | |
10144 | || (version == 2 && nr_columns != 0)) | |
10145 | { | |
10146 | complaint (&symfile_complaints, | |
10147 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10148 | " all zero [in modules %s]"), | |
10149 | dwp_file->name); | |
10150 | } | |
10151 | return htab; | |
10152 | } | |
10153 | ||
10154 | if (version == 1) | |
10155 | { | |
10156 | htab->section_pool.v1.indices = | |
10157 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10158 | /* It's harder to decide whether the section is too small in v1. | |
10159 | V1 is deprecated anyway so we punt. */ | |
10160 | } | |
10161 | else | |
10162 | { | |
10163 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10164 | int *ids = htab->section_pool.v2.section_ids; | |
10165 | /* Reverse map for error checking. */ | |
10166 | int ids_seen[DW_SECT_MAX + 1]; | |
10167 | int i; | |
10168 | ||
10169 | if (nr_columns < 2) | |
10170 | { | |
10171 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10172 | " in section table [in module %s]"), | |
10173 | dwp_file->name); | |
10174 | } | |
10175 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10176 | { | |
10177 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10178 | " in section table [in module %s]"), | |
10179 | dwp_file->name); | |
10180 | } | |
10181 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10182 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10183 | for (i = 0; i < nr_columns; ++i) | |
10184 | { | |
10185 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10186 | ||
10187 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10188 | { | |
10189 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10190 | " in section table [in module %s]"), | |
10191 | id, dwp_file->name); | |
10192 | } | |
10193 | if (ids_seen[id] != -1) | |
10194 | { | |
10195 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
10196 | " id %d in section table [in module %s]"), | |
10197 | id, dwp_file->name); | |
10198 | } | |
10199 | ids_seen[id] = i; | |
10200 | ids[i] = id; | |
10201 | } | |
10202 | /* Must have exactly one info or types section. */ | |
10203 | if (((ids_seen[DW_SECT_INFO] != -1) | |
10204 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
10205 | != 1) | |
10206 | { | |
10207 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
10208 | " DWO info/types section [in module %s]"), | |
10209 | dwp_file->name); | |
10210 | } | |
10211 | /* Must have an abbrev section. */ | |
10212 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
10213 | { | |
10214 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
10215 | " section [in module %s]"), | |
10216 | dwp_file->name); | |
10217 | } | |
10218 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
10219 | htab->section_pool.v2.sizes = | |
10220 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
10221 | * nr_units * nr_columns); | |
10222 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
10223 | * nr_units * nr_columns)) | |
10224 | > index_end) | |
10225 | { | |
10226 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
10227 | " [in module %s]"), | |
10228 | dwp_file->name); | |
10229 | } | |
10230 | } | |
80626a55 DE |
10231 | |
10232 | return htab; | |
10233 | } | |
10234 | ||
10235 | /* Update SECTIONS with the data from SECTP. | |
10236 | ||
10237 | This function is like the other "locate" section routines that are | |
10238 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 10239 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
10240 | |
10241 | The result is non-zero for success, or zero if an error was found. */ | |
10242 | ||
10243 | static int | |
73869dc2 DE |
10244 | locate_v1_virtual_dwo_sections (asection *sectp, |
10245 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
10246 | { |
10247 | const struct dwop_section_names *names = &dwop_section_names; | |
10248 | ||
10249 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10250 | { | |
10251 | /* There can be only one. */ | |
049412e3 | 10252 | if (sections->abbrev.s.section != NULL) |
80626a55 | 10253 | return 0; |
049412e3 | 10254 | sections->abbrev.s.section = sectp; |
80626a55 DE |
10255 | sections->abbrev.size = bfd_get_section_size (sectp); |
10256 | } | |
10257 | else if (section_is_p (sectp->name, &names->info_dwo) | |
10258 | || section_is_p (sectp->name, &names->types_dwo)) | |
10259 | { | |
10260 | /* There can be only one. */ | |
049412e3 | 10261 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 10262 | return 0; |
049412e3 | 10263 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
10264 | sections->info_or_types.size = bfd_get_section_size (sectp); |
10265 | } | |
10266 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10267 | { | |
10268 | /* There can be only one. */ | |
049412e3 | 10269 | if (sections->line.s.section != NULL) |
80626a55 | 10270 | return 0; |
049412e3 | 10271 | sections->line.s.section = sectp; |
80626a55 DE |
10272 | sections->line.size = bfd_get_section_size (sectp); |
10273 | } | |
10274 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10275 | { | |
10276 | /* There can be only one. */ | |
049412e3 | 10277 | if (sections->loc.s.section != NULL) |
80626a55 | 10278 | return 0; |
049412e3 | 10279 | sections->loc.s.section = sectp; |
80626a55 DE |
10280 | sections->loc.size = bfd_get_section_size (sectp); |
10281 | } | |
10282 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10283 | { | |
10284 | /* There can be only one. */ | |
049412e3 | 10285 | if (sections->macinfo.s.section != NULL) |
80626a55 | 10286 | return 0; |
049412e3 | 10287 | sections->macinfo.s.section = sectp; |
80626a55 DE |
10288 | sections->macinfo.size = bfd_get_section_size (sectp); |
10289 | } | |
10290 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10291 | { | |
10292 | /* There can be only one. */ | |
049412e3 | 10293 | if (sections->macro.s.section != NULL) |
80626a55 | 10294 | return 0; |
049412e3 | 10295 | sections->macro.s.section = sectp; |
80626a55 DE |
10296 | sections->macro.size = bfd_get_section_size (sectp); |
10297 | } | |
10298 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10299 | { | |
10300 | /* There can be only one. */ | |
049412e3 | 10301 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10302 | return 0; |
049412e3 | 10303 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10304 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10305 | } | |
10306 | else | |
10307 | { | |
10308 | /* No other kind of section is valid. */ | |
10309 | return 0; | |
10310 | } | |
10311 | ||
10312 | return 1; | |
10313 | } | |
10314 | ||
73869dc2 DE |
10315 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10316 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10317 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10318 | This is for DWP version 1 files. */ | |
80626a55 DE |
10319 | |
10320 | static struct dwo_unit * | |
73869dc2 DE |
10321 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10322 | uint32_t unit_index, | |
10323 | const char *comp_dir, | |
10324 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10325 | { |
10326 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10327 | const struct dwp_hash_table *dwp_htab = |
10328 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10329 | bfd *dbfd = dwp_file->dbfd; |
10330 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10331 | struct dwo_file *dwo_file; | |
10332 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10333 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
10334 | void **dwo_file_slot; |
10335 | char *virtual_dwo_name; | |
80626a55 DE |
10336 | struct cleanup *cleanups; |
10337 | int i; | |
10338 | ||
73869dc2 DE |
10339 | gdb_assert (dwp_file->version == 1); |
10340 | ||
b4f54984 | 10341 | if (dwarf_read_debug) |
80626a55 | 10342 | { |
73869dc2 | 10343 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10344 | kind, |
73869dc2 | 10345 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10346 | dwp_file->name); |
10347 | } | |
10348 | ||
19ac8c2e | 10349 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10350 | Put a limit on the number of sections we look for so that bad data |
10351 | doesn't cause us to loop forever. */ | |
10352 | ||
73869dc2 | 10353 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10354 | (1 /* .debug_info or .debug_types */ \ |
10355 | + 1 /* .debug_abbrev */ \ | |
10356 | + 1 /* .debug_line */ \ | |
10357 | + 1 /* .debug_loc */ \ | |
10358 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10359 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10360 | + 1 /* trailing zero */) |
10361 | ||
10362 | memset (§ions, 0, sizeof (sections)); | |
10363 | cleanups = make_cleanup (null_cleanup, 0); | |
10364 | ||
73869dc2 | 10365 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10366 | { |
10367 | asection *sectp; | |
10368 | uint32_t section_nr = | |
10369 | read_4_bytes (dbfd, | |
73869dc2 DE |
10370 | dwp_htab->section_pool.v1.indices |
10371 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10372 | |
10373 | if (section_nr == 0) | |
10374 | break; | |
10375 | if (section_nr >= dwp_file->num_sections) | |
10376 | { | |
10377 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10378 | " [in module %s]"), | |
10379 | dwp_file->name); | |
10380 | } | |
10381 | ||
10382 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10383 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10384 | { |
10385 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10386 | " [in module %s]"), | |
10387 | dwp_file->name); | |
10388 | } | |
10389 | } | |
10390 | ||
10391 | if (i < 2 | |
a32a8923 DE |
10392 | || dwarf2_section_empty_p (§ions.info_or_types) |
10393 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10394 | { |
10395 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10396 | " [in module %s]"), | |
10397 | dwp_file->name); | |
10398 | } | |
73869dc2 | 10399 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10400 | { |
10401 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10402 | " [in module %s]"), | |
10403 | dwp_file->name); | |
10404 | } | |
10405 | ||
10406 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10407 | have dwo_unit "live" in that. At least for now. | |
10408 | ||
10409 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10410 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10411 | file, we can combine them back into a virtual DWO file to save space |
10412 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10413 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10414 | ||
2792b94d PM |
10415 | virtual_dwo_name = |
10416 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
10417 | get_section_id (§ions.abbrev), |
10418 | get_section_id (§ions.line), | |
10419 | get_section_id (§ions.loc), | |
10420 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
10421 | make_cleanup (xfree, virtual_dwo_name); |
10422 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 10423 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
10424 | /* Create one if necessary. */ |
10425 | if (*dwo_file_slot == NULL) | |
10426 | { | |
b4f54984 | 10427 | if (dwarf_read_debug) |
80626a55 DE |
10428 | { |
10429 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10430 | virtual_dwo_name); | |
10431 | } | |
10432 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10433 | dwo_file->dwo_name |
10434 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10435 | virtual_dwo_name, | |
10436 | strlen (virtual_dwo_name)); | |
0ac5b59e | 10437 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10438 | dwo_file->sections.abbrev = sections.abbrev; |
10439 | dwo_file->sections.line = sections.line; | |
10440 | dwo_file->sections.loc = sections.loc; | |
10441 | dwo_file->sections.macinfo = sections.macinfo; | |
10442 | dwo_file->sections.macro = sections.macro; | |
10443 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10444 | /* The "str" section is global to the entire DWP file. */ | |
10445 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10446 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10447 | there's no need to record it in dwo_file. |
10448 | Also, we can't simply record type sections in dwo_file because | |
10449 | we record a pointer into the vector in dwo_unit. As we collect more | |
10450 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10451 | for it, invalidating all copies of pointers into the previous |
10452 | contents. */ | |
80626a55 DE |
10453 | *dwo_file_slot = dwo_file; |
10454 | } | |
10455 | else | |
10456 | { | |
b4f54984 | 10457 | if (dwarf_read_debug) |
80626a55 DE |
10458 | { |
10459 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10460 | virtual_dwo_name); | |
10461 | } | |
9a3c8263 | 10462 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 DE |
10463 | } |
10464 | do_cleanups (cleanups); | |
10465 | ||
10466 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10467 | dwo_unit->dwo_file = dwo_file; | |
10468 | dwo_unit->signature = signature; | |
8d749320 SM |
10469 | dwo_unit->section = |
10470 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10471 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10472 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10473 | |
10474 | return dwo_unit; | |
10475 | } | |
10476 | ||
73869dc2 DE |
10477 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10478 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10479 | piece within that section used by a TU/CU, return a virtual section | |
10480 | of just that piece. */ | |
10481 | ||
10482 | static struct dwarf2_section_info | |
10483 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10484 | bfd_size_type offset, bfd_size_type size) | |
10485 | { | |
10486 | struct dwarf2_section_info result; | |
10487 | asection *sectp; | |
10488 | ||
10489 | gdb_assert (section != NULL); | |
10490 | gdb_assert (!section->is_virtual); | |
10491 | ||
10492 | memset (&result, 0, sizeof (result)); | |
10493 | result.s.containing_section = section; | |
10494 | result.is_virtual = 1; | |
10495 | ||
10496 | if (size == 0) | |
10497 | return result; | |
10498 | ||
10499 | sectp = get_section_bfd_section (section); | |
10500 | ||
10501 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10502 | bounds of the real section. This is a pretty-rare event, so just | |
10503 | flag an error (easier) instead of a warning and trying to cope. */ | |
10504 | if (sectp == NULL | |
10505 | || offset + size > bfd_get_section_size (sectp)) | |
10506 | { | |
10507 | bfd *abfd = sectp->owner; | |
10508 | ||
10509 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10510 | " in section %s [in module %s]"), | |
10511 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10512 | objfile_name (dwarf2_per_objfile->objfile)); | |
10513 | } | |
10514 | ||
10515 | result.virtual_offset = offset; | |
10516 | result.size = size; | |
10517 | return result; | |
10518 | } | |
10519 | ||
10520 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10521 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10522 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10523 | This is for DWP version 2 files. */ | |
10524 | ||
10525 | static struct dwo_unit * | |
10526 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10527 | uint32_t unit_index, | |
10528 | const char *comp_dir, | |
10529 | ULONGEST signature, int is_debug_types) | |
10530 | { | |
10531 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10532 | const struct dwp_hash_table *dwp_htab = | |
10533 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10534 | bfd *dbfd = dwp_file->dbfd; | |
10535 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10536 | struct dwo_file *dwo_file; | |
10537 | struct dwo_unit *dwo_unit; | |
10538 | struct virtual_v2_dwo_sections sections; | |
10539 | void **dwo_file_slot; | |
10540 | char *virtual_dwo_name; | |
73869dc2 DE |
10541 | struct cleanup *cleanups; |
10542 | int i; | |
10543 | ||
10544 | gdb_assert (dwp_file->version == 2); | |
10545 | ||
b4f54984 | 10546 | if (dwarf_read_debug) |
73869dc2 DE |
10547 | { |
10548 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10549 | kind, | |
10550 | pulongest (unit_index), hex_string (signature), | |
10551 | dwp_file->name); | |
10552 | } | |
10553 | ||
10554 | /* Fetch the section offsets of this DWO unit. */ | |
10555 | ||
10556 | memset (§ions, 0, sizeof (sections)); | |
10557 | cleanups = make_cleanup (null_cleanup, 0); | |
10558 | ||
10559 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10560 | { | |
10561 | uint32_t offset = read_4_bytes (dbfd, | |
10562 | dwp_htab->section_pool.v2.offsets | |
10563 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10564 | + i) | |
10565 | * sizeof (uint32_t))); | |
10566 | uint32_t size = read_4_bytes (dbfd, | |
10567 | dwp_htab->section_pool.v2.sizes | |
10568 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10569 | + i) | |
10570 | * sizeof (uint32_t))); | |
10571 | ||
10572 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10573 | { | |
10574 | case DW_SECT_INFO: | |
10575 | case DW_SECT_TYPES: | |
10576 | sections.info_or_types_offset = offset; | |
10577 | sections.info_or_types_size = size; | |
10578 | break; | |
10579 | case DW_SECT_ABBREV: | |
10580 | sections.abbrev_offset = offset; | |
10581 | sections.abbrev_size = size; | |
10582 | break; | |
10583 | case DW_SECT_LINE: | |
10584 | sections.line_offset = offset; | |
10585 | sections.line_size = size; | |
10586 | break; | |
10587 | case DW_SECT_LOC: | |
10588 | sections.loc_offset = offset; | |
10589 | sections.loc_size = size; | |
10590 | break; | |
10591 | case DW_SECT_STR_OFFSETS: | |
10592 | sections.str_offsets_offset = offset; | |
10593 | sections.str_offsets_size = size; | |
10594 | break; | |
10595 | case DW_SECT_MACINFO: | |
10596 | sections.macinfo_offset = offset; | |
10597 | sections.macinfo_size = size; | |
10598 | break; | |
10599 | case DW_SECT_MACRO: | |
10600 | sections.macro_offset = offset; | |
10601 | sections.macro_size = size; | |
10602 | break; | |
10603 | } | |
10604 | } | |
10605 | ||
10606 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10607 | have dwo_unit "live" in that. At least for now. | |
10608 | ||
10609 | The DWP file can be made up of a random collection of CUs and TUs. | |
10610 | However, for each CU + set of TUs that came from the same original DWO | |
10611 | file, we can combine them back into a virtual DWO file to save space | |
10612 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10613 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10614 | ||
10615 | virtual_dwo_name = | |
10616 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10617 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10618 | (long) (sections.line_size ? sections.line_offset : 0), | |
10619 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10620 | (long) (sections.str_offsets_size | |
10621 | ? sections.str_offsets_offset : 0)); | |
10622 | make_cleanup (xfree, virtual_dwo_name); | |
10623 | /* Can we use an existing virtual DWO file? */ | |
10624 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10625 | /* Create one if necessary. */ | |
10626 | if (*dwo_file_slot == NULL) | |
10627 | { | |
b4f54984 | 10628 | if (dwarf_read_debug) |
73869dc2 DE |
10629 | { |
10630 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10631 | virtual_dwo_name); | |
10632 | } | |
10633 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10634 | dwo_file->dwo_name |
10635 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10636 | virtual_dwo_name, | |
10637 | strlen (virtual_dwo_name)); | |
73869dc2 DE |
10638 | dwo_file->comp_dir = comp_dir; |
10639 | dwo_file->sections.abbrev = | |
10640 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10641 | sections.abbrev_offset, sections.abbrev_size); | |
10642 | dwo_file->sections.line = | |
10643 | create_dwp_v2_section (&dwp_file->sections.line, | |
10644 | sections.line_offset, sections.line_size); | |
10645 | dwo_file->sections.loc = | |
10646 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10647 | sections.loc_offset, sections.loc_size); | |
10648 | dwo_file->sections.macinfo = | |
10649 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10650 | sections.macinfo_offset, sections.macinfo_size); | |
10651 | dwo_file->sections.macro = | |
10652 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10653 | sections.macro_offset, sections.macro_size); | |
10654 | dwo_file->sections.str_offsets = | |
10655 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10656 | sections.str_offsets_offset, | |
10657 | sections.str_offsets_size); | |
10658 | /* The "str" section is global to the entire DWP file. */ | |
10659 | dwo_file->sections.str = dwp_file->sections.str; | |
10660 | /* The info or types section is assigned below to dwo_unit, | |
10661 | there's no need to record it in dwo_file. | |
10662 | Also, we can't simply record type sections in dwo_file because | |
10663 | we record a pointer into the vector in dwo_unit. As we collect more | |
10664 | types we'll grow the vector and eventually have to reallocate space | |
10665 | for it, invalidating all copies of pointers into the previous | |
10666 | contents. */ | |
10667 | *dwo_file_slot = dwo_file; | |
10668 | } | |
10669 | else | |
10670 | { | |
b4f54984 | 10671 | if (dwarf_read_debug) |
73869dc2 DE |
10672 | { |
10673 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10674 | virtual_dwo_name); | |
10675 | } | |
9a3c8263 | 10676 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 DE |
10677 | } |
10678 | do_cleanups (cleanups); | |
10679 | ||
10680 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10681 | dwo_unit->dwo_file = dwo_file; | |
10682 | dwo_unit->signature = signature; | |
8d749320 SM |
10683 | dwo_unit->section = |
10684 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10685 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10686 | ? &dwp_file->sections.types | |
10687 | : &dwp_file->sections.info, | |
10688 | sections.info_or_types_offset, | |
10689 | sections.info_or_types_size); | |
10690 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10691 | ||
10692 | return dwo_unit; | |
10693 | } | |
10694 | ||
57d63ce2 DE |
10695 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10696 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10697 | |
10698 | static struct dwo_unit * | |
57d63ce2 DE |
10699 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10700 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10701 | { |
57d63ce2 DE |
10702 | const struct dwp_hash_table *dwp_htab = |
10703 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10704 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10705 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10706 | uint32_t hash = signature & mask; |
10707 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10708 | unsigned int i; | |
10709 | void **slot; | |
870f88f7 | 10710 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
10711 | |
10712 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10713 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10714 | slot = htab_find_slot (is_debug_types |
10715 | ? dwp_file->loaded_tus | |
10716 | : dwp_file->loaded_cus, | |
10717 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10718 | |
10719 | if (*slot != NULL) | |
9a3c8263 | 10720 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10721 | |
10722 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10723 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10724 | { |
10725 | ULONGEST signature_in_table; | |
10726 | ||
10727 | signature_in_table = | |
57d63ce2 | 10728 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10729 | if (signature_in_table == signature) |
10730 | { | |
57d63ce2 DE |
10731 | uint32_t unit_index = |
10732 | read_4_bytes (dbfd, | |
10733 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10734 | |
73869dc2 DE |
10735 | if (dwp_file->version == 1) |
10736 | { | |
10737 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10738 | comp_dir, signature, | |
10739 | is_debug_types); | |
10740 | } | |
10741 | else | |
10742 | { | |
10743 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10744 | comp_dir, signature, | |
10745 | is_debug_types); | |
10746 | } | |
9a3c8263 | 10747 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10748 | } |
10749 | if (signature_in_table == 0) | |
10750 | return NULL; | |
10751 | hash = (hash + hash2) & mask; | |
10752 | } | |
10753 | ||
10754 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10755 | " [in module %s]"), | |
10756 | dwp_file->name); | |
10757 | } | |
10758 | ||
ab5088bf | 10759 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10760 | Open the file specified by FILE_NAME and hand it off to BFD for |
10761 | preliminary analysis. Return a newly initialized bfd *, which | |
10762 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10763 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10764 | SEARCH_CWD is true if the current directory is to be searched. |
10765 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10766 | If successful, the file is added to the bfd include table of the |
10767 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10768 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10769 | NOTE: This function is derived from symfile_bfd_open. */ |
10770 | ||
192b62ce | 10771 | static gdb_bfd_ref_ptr |
6ac97d4c | 10772 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 10773 | { |
80626a55 | 10774 | int desc, flags; |
3019eac3 | 10775 | char *absolute_name; |
9c02c129 DE |
10776 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10777 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10778 | to debug_file_directory. */ | |
10779 | char *search_path; | |
10780 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10781 | ||
6ac97d4c DE |
10782 | if (search_cwd) |
10783 | { | |
10784 | if (*debug_file_directory != '\0') | |
10785 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 10786 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
10787 | else |
10788 | search_path = xstrdup ("."); | |
10789 | } | |
9c02c129 | 10790 | else |
6ac97d4c | 10791 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10792 | |
492c0ab7 | 10793 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10794 | if (is_dwp) |
10795 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10796 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10797 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10798 | xfree (search_path); |
3019eac3 DE |
10799 | if (desc < 0) |
10800 | return NULL; | |
10801 | ||
192b62ce | 10802 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 10803 | xfree (absolute_name); |
9c02c129 DE |
10804 | if (sym_bfd == NULL) |
10805 | return NULL; | |
192b62ce | 10806 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 10807 | |
192b62ce TT |
10808 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
10809 | return NULL; | |
3019eac3 | 10810 | |
13aaf454 DE |
10811 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10812 | This is important because things like demangled_names_hash lives in the | |
10813 | objfile's per_bfd space and may have references to things like symbol | |
10814 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 10815 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 10816 | |
3019eac3 DE |
10817 | return sym_bfd; |
10818 | } | |
10819 | ||
ab5088bf | 10820 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10821 | COMP_DIR is the DW_AT_comp_dir attribute. |
10822 | The result is the bfd handle of the file. | |
10823 | If there is a problem finding or opening the file, return NULL. | |
10824 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10825 | same as symfile_bfd_open. */ | |
10826 | ||
192b62ce | 10827 | static gdb_bfd_ref_ptr |
ab5088bf | 10828 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 10829 | { |
80626a55 | 10830 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10831 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10832 | |
10833 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10834 | ||
10835 | if (comp_dir != NULL) | |
10836 | { | |
b36cec19 PA |
10837 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
10838 | file_name, (char *) NULL); | |
3019eac3 DE |
10839 | |
10840 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10841 | search path, which seems useful. */ | |
192b62ce TT |
10842 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
10843 | 1 /*search_cwd*/)); | |
3019eac3 DE |
10844 | xfree (path_to_try); |
10845 | if (abfd != NULL) | |
10846 | return abfd; | |
10847 | } | |
10848 | ||
10849 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10850 | is a list of paths. */ | |
10851 | ||
10852 | if (*debug_file_directory == '\0') | |
10853 | return NULL; | |
10854 | ||
6ac97d4c | 10855 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10856 | } |
10857 | ||
80626a55 DE |
10858 | /* This function is mapped across the sections and remembers the offset and |
10859 | size of each of the DWO debugging sections we are interested in. */ | |
10860 | ||
10861 | static void | |
10862 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10863 | { | |
9a3c8263 | 10864 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10865 | const struct dwop_section_names *names = &dwop_section_names; |
10866 | ||
10867 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10868 | { | |
049412e3 | 10869 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10870 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10871 | } | |
10872 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10873 | { | |
049412e3 | 10874 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10875 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10876 | } | |
10877 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10878 | { | |
049412e3 | 10879 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10880 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10881 | } | |
10882 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10883 | { | |
049412e3 | 10884 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10885 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10886 | } | |
10887 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10888 | { | |
049412e3 | 10889 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10890 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10891 | } | |
10892 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10893 | { | |
049412e3 | 10894 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10895 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10896 | } | |
10897 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10898 | { | |
049412e3 | 10899 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10900 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10901 | } | |
10902 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10903 | { | |
049412e3 | 10904 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10905 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10906 | } | |
10907 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10908 | { | |
10909 | struct dwarf2_section_info type_section; | |
10910 | ||
10911 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10912 | type_section.s.section = sectp; |
80626a55 DE |
10913 | type_section.size = bfd_get_section_size (sectp); |
10914 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10915 | &type_section); | |
10916 | } | |
10917 | } | |
10918 | ||
ab5088bf | 10919 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10920 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10921 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10922 | |
10923 | static struct dwo_file * | |
0ac5b59e DE |
10924 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10925 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10926 | { |
10927 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 10928 | struct dwo_file *dwo_file; |
3019eac3 DE |
10929 | struct cleanup *cleanups; |
10930 | ||
192b62ce | 10931 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
10932 | if (dbfd == NULL) |
10933 | { | |
b4f54984 | 10934 | if (dwarf_read_debug) |
80626a55 DE |
10935 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10936 | return NULL; | |
10937 | } | |
10938 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10939 | dwo_file->dwo_name = dwo_name; |
10940 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 10941 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
10942 | |
10943 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10944 | ||
192b62ce TT |
10945 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
10946 | &dwo_file->sections); | |
3019eac3 | 10947 | |
33c5cd75 | 10948 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 10949 | |
78d4d2c5 JK |
10950 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
10951 | dwo_file->tus); | |
3019eac3 DE |
10952 | |
10953 | discard_cleanups (cleanups); | |
10954 | ||
b4f54984 | 10955 | if (dwarf_read_debug) |
80626a55 DE |
10956 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10957 | ||
3019eac3 DE |
10958 | return dwo_file; |
10959 | } | |
10960 | ||
80626a55 | 10961 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10962 | size of each of the DWP debugging sections common to version 1 and 2 that |
10963 | we are interested in. */ | |
3019eac3 | 10964 | |
80626a55 | 10965 | static void |
73869dc2 DE |
10966 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10967 | void *dwp_file_ptr) | |
3019eac3 | 10968 | { |
9a3c8263 | 10969 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10970 | const struct dwop_section_names *names = &dwop_section_names; |
10971 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10972 | |
80626a55 | 10973 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10974 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10975 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10976 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10977 | |
80626a55 DE |
10978 | /* Look for specific sections that we need. */ |
10979 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10980 | { | |
049412e3 | 10981 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10982 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10983 | } | |
10984 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10985 | { | |
049412e3 | 10986 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
10987 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10988 | } | |
10989 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10990 | { | |
049412e3 | 10991 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
10992 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10993 | } | |
10994 | } | |
3019eac3 | 10995 | |
73869dc2 DE |
10996 | /* This function is mapped across the sections and remembers the offset and |
10997 | size of each of the DWP version 2 debugging sections that we are interested | |
10998 | in. This is split into a separate function because we don't know if we | |
10999 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11000 | ||
11001 | static void | |
11002 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11003 | { | |
9a3c8263 | 11004 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11005 | const struct dwop_section_names *names = &dwop_section_names; |
11006 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11007 | ||
11008 | /* Record the ELF section number for later lookup: this is what the | |
11009 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11010 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11011 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11012 | ||
11013 | /* Look for specific sections that we need. */ | |
11014 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11015 | { | |
049412e3 | 11016 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11017 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11018 | } | |
11019 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11020 | { | |
049412e3 | 11021 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11022 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11023 | } | |
11024 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11025 | { | |
049412e3 | 11026 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11027 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11028 | } | |
11029 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11030 | { | |
049412e3 | 11031 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11032 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11033 | } | |
11034 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11035 | { | |
049412e3 | 11036 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11037 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11038 | } | |
11039 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11040 | { | |
049412e3 | 11041 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11042 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11043 | } | |
11044 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11045 | { | |
049412e3 | 11046 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11047 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11048 | } | |
11049 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11050 | { | |
049412e3 | 11051 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11052 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11053 | } | |
11054 | } | |
11055 | ||
80626a55 | 11056 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11057 | |
80626a55 DE |
11058 | static hashval_t |
11059 | hash_dwp_loaded_cutus (const void *item) | |
11060 | { | |
9a3c8263 | 11061 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11062 | |
80626a55 DE |
11063 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11064 | return dwo_unit->signature; | |
3019eac3 DE |
11065 | } |
11066 | ||
80626a55 | 11067 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11068 | |
80626a55 DE |
11069 | static int |
11070 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11071 | { |
9a3c8263 SM |
11072 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11073 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11074 | |
80626a55 DE |
11075 | return dua->signature == dub->signature; |
11076 | } | |
3019eac3 | 11077 | |
80626a55 | 11078 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11079 | |
80626a55 DE |
11080 | static htab_t |
11081 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11082 | { | |
11083 | return htab_create_alloc_ex (3, | |
11084 | hash_dwp_loaded_cutus, | |
11085 | eq_dwp_loaded_cutus, | |
11086 | NULL, | |
11087 | &objfile->objfile_obstack, | |
11088 | hashtab_obstack_allocate, | |
11089 | dummy_obstack_deallocate); | |
11090 | } | |
3019eac3 | 11091 | |
ab5088bf DE |
11092 | /* Try to open DWP file FILE_NAME. |
11093 | The result is the bfd handle of the file. | |
11094 | If there is a problem finding or opening the file, return NULL. | |
11095 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11096 | same as symfile_bfd_open. */ | |
11097 | ||
192b62ce | 11098 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11099 | open_dwp_file (const char *file_name) |
11100 | { | |
192b62ce TT |
11101 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11102 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11103 | if (abfd != NULL) |
11104 | return abfd; | |
11105 | ||
11106 | /* Work around upstream bug 15652. | |
11107 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11108 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11109 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11110 | of the executable's path may have discarded the needed info. | |
11111 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11112 | .gnu_debuglink, but that doesn't exist yet.] | |
11113 | Strip the directory from FILE_NAME and search again. */ | |
11114 | if (*debug_file_directory != '\0') | |
11115 | { | |
11116 | /* Don't implicitly search the current directory here. | |
11117 | If the user wants to search "." to handle this case, | |
11118 | it must be added to debug-file-directory. */ | |
11119 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11120 | 0 /*search_cwd*/); | |
11121 | } | |
11122 | ||
11123 | return NULL; | |
ab5088bf DE |
11124 | } |
11125 | ||
80626a55 DE |
11126 | /* Initialize the use of the DWP file for the current objfile. |
11127 | By convention the name of the DWP file is ${objfile}.dwp. | |
11128 | The result is NULL if it can't be found. */ | |
a766d390 | 11129 | |
80626a55 | 11130 | static struct dwp_file * |
ab5088bf | 11131 | open_and_init_dwp_file (void) |
80626a55 DE |
11132 | { |
11133 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11134 | struct dwp_file *dwp_file; | |
80626a55 | 11135 | |
82bf32bc JK |
11136 | /* Try to find first .dwp for the binary file before any symbolic links |
11137 | resolving. */ | |
6c447423 DE |
11138 | |
11139 | /* If the objfile is a debug file, find the name of the real binary | |
11140 | file and get the name of dwp file from there. */ | |
d721ba37 | 11141 | std::string dwp_name; |
6c447423 DE |
11142 | if (objfile->separate_debug_objfile_backlink != NULL) |
11143 | { | |
11144 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11145 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11146 | |
d721ba37 | 11147 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11148 | } |
11149 | else | |
d721ba37 PA |
11150 | dwp_name = objfile->original_name; |
11151 | ||
11152 | dwp_name += ".dwp"; | |
80626a55 | 11153 | |
d721ba37 | 11154 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11155 | if (dbfd == NULL |
11156 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11157 | { | |
11158 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11159 | dwp_name = objfile_name (objfile); |
11160 | dwp_name += ".dwp"; | |
11161 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11162 | } |
11163 | ||
80626a55 DE |
11164 | if (dbfd == NULL) |
11165 | { | |
b4f54984 | 11166 | if (dwarf_read_debug) |
d721ba37 | 11167 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11168 | return NULL; |
3019eac3 | 11169 | } |
80626a55 | 11170 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11171 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11172 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11173 | |
80626a55 | 11174 | /* +1: section 0 is unused */ |
192b62ce | 11175 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11176 | dwp_file->elf_sections = |
11177 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11178 | dwp_file->num_sections, asection *); | |
11179 | ||
192b62ce TT |
11180 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11181 | dwp_file); | |
80626a55 DE |
11182 | |
11183 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11184 | ||
11185 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11186 | ||
73869dc2 DE |
11187 | /* The DWP file version is stored in the hash table. Oh well. */ |
11188 | if (dwp_file->cus->version != dwp_file->tus->version) | |
11189 | { | |
11190 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11191 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11192 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11193 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11194 | " TU version %s [in DWP file %s]"), | |
11195 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11196 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 DE |
11197 | } |
11198 | dwp_file->version = dwp_file->cus->version; | |
11199 | ||
11200 | if (dwp_file->version == 2) | |
192b62ce TT |
11201 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
11202 | dwp_file); | |
73869dc2 | 11203 | |
19ac8c2e DE |
11204 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
11205 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 11206 | |
b4f54984 | 11207 | if (dwarf_read_debug) |
80626a55 DE |
11208 | { |
11209 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
11210 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
11211 | " %s CUs, %s TUs\n", |
11212 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
11213 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
11214 | } |
11215 | ||
11216 | return dwp_file; | |
3019eac3 | 11217 | } |
c906108c | 11218 | |
ab5088bf DE |
11219 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
11220 | ||
11221 | static struct dwp_file * | |
11222 | get_dwp_file (void) | |
11223 | { | |
11224 | if (! dwarf2_per_objfile->dwp_checked) | |
11225 | { | |
11226 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
11227 | dwarf2_per_objfile->dwp_checked = 1; | |
11228 | } | |
11229 | return dwarf2_per_objfile->dwp_file; | |
11230 | } | |
11231 | ||
80626a55 DE |
11232 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
11233 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
11234 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 11235 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
11236 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
11237 | ||
11238 | This is called, for example, when wanting to read a variable with a | |
11239 | complex location. Therefore we don't want to do file i/o for every call. | |
11240 | Therefore we don't want to look for a DWO file on every call. | |
11241 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
11242 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
11243 | for a DWO file. | |
11244 | ||
1c658ad5 | 11245 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 11246 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 11247 | |
3019eac3 | 11248 | static struct dwo_unit * |
80626a55 DE |
11249 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
11250 | const char *dwo_name, const char *comp_dir, | |
11251 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
11252 | { |
11253 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
11254 | const char *kind = is_debug_types ? "TU" : "CU"; |
11255 | void **dwo_file_slot; | |
3019eac3 | 11256 | struct dwo_file *dwo_file; |
80626a55 | 11257 | struct dwp_file *dwp_file; |
cb1df416 | 11258 | |
6a506a2d DE |
11259 | /* First see if there's a DWP file. |
11260 | If we have a DWP file but didn't find the DWO inside it, don't | |
11261 | look for the original DWO file. It makes gdb behave differently | |
11262 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 11263 | |
ab5088bf | 11264 | dwp_file = get_dwp_file (); |
80626a55 | 11265 | if (dwp_file != NULL) |
cf2c3c16 | 11266 | { |
80626a55 DE |
11267 | const struct dwp_hash_table *dwp_htab = |
11268 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11269 | ||
11270 | if (dwp_htab != NULL) | |
11271 | { | |
11272 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
11273 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
11274 | signature, is_debug_types); | |
80626a55 DE |
11275 | |
11276 | if (dwo_cutu != NULL) | |
11277 | { | |
b4f54984 | 11278 | if (dwarf_read_debug) |
80626a55 DE |
11279 | { |
11280 | fprintf_unfiltered (gdb_stdlog, | |
11281 | "Virtual DWO %s %s found: @%s\n", | |
11282 | kind, hex_string (signature), | |
11283 | host_address_to_string (dwo_cutu)); | |
11284 | } | |
11285 | return dwo_cutu; | |
11286 | } | |
11287 | } | |
11288 | } | |
6a506a2d | 11289 | else |
80626a55 | 11290 | { |
6a506a2d | 11291 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11292 | |
6a506a2d DE |
11293 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11294 | if (*dwo_file_slot == NULL) | |
80626a55 | 11295 | { |
6a506a2d DE |
11296 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11297 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11298 | } |
6a506a2d | 11299 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11300 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11301 | |
6a506a2d | 11302 | if (dwo_file != NULL) |
19c3d4c9 | 11303 | { |
6a506a2d DE |
11304 | struct dwo_unit *dwo_cutu = NULL; |
11305 | ||
11306 | if (is_debug_types && dwo_file->tus) | |
11307 | { | |
11308 | struct dwo_unit find_dwo_cutu; | |
11309 | ||
11310 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11311 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11312 | dwo_cutu |
11313 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 11314 | } |
33c5cd75 | 11315 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 11316 | { |
33c5cd75 DB |
11317 | struct dwo_unit find_dwo_cutu; |
11318 | ||
11319 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11320 | find_dwo_cutu.signature = signature; | |
11321 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
11322 | &find_dwo_cutu); | |
6a506a2d DE |
11323 | } |
11324 | ||
11325 | if (dwo_cutu != NULL) | |
11326 | { | |
b4f54984 | 11327 | if (dwarf_read_debug) |
6a506a2d DE |
11328 | { |
11329 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11330 | kind, dwo_name, hex_string (signature), | |
11331 | host_address_to_string (dwo_cutu)); | |
11332 | } | |
11333 | return dwo_cutu; | |
80626a55 DE |
11334 | } |
11335 | } | |
2e276125 | 11336 | } |
9cdd5dbd | 11337 | |
80626a55 DE |
11338 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11339 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11340 | correctly to find the file. */ | |
11341 | ||
b4f54984 | 11342 | if (dwarf_read_debug) |
80626a55 DE |
11343 | { |
11344 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11345 | kind, dwo_name, hex_string (signature)); | |
11346 | } | |
3019eac3 | 11347 | |
6656a72d DE |
11348 | /* This is a warning and not a complaint because it can be caused by |
11349 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11350 | { |
11351 | /* Print the name of the DWP file if we looked there, helps the user | |
11352 | better diagnose the problem. */ | |
11353 | char *dwp_text = NULL; | |
11354 | struct cleanup *cleanups; | |
11355 | ||
11356 | if (dwp_file != NULL) | |
11357 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
11358 | cleanups = make_cleanup (xfree, dwp_text); | |
11359 | ||
11360 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11361 | " [in module %s]"), | |
11362 | kind, dwo_name, hex_string (signature), | |
11363 | dwp_text != NULL ? dwp_text : "", | |
11364 | this_unit->is_debug_types ? "TU" : "CU", | |
9c541725 | 11365 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 DE |
11366 | |
11367 | do_cleanups (cleanups); | |
11368 | } | |
3019eac3 | 11369 | return NULL; |
5fb290d7 DJ |
11370 | } |
11371 | ||
80626a55 DE |
11372 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11373 | See lookup_dwo_cutu_unit for details. */ | |
11374 | ||
11375 | static struct dwo_unit * | |
11376 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11377 | const char *dwo_name, const char *comp_dir, | |
11378 | ULONGEST signature) | |
11379 | { | |
11380 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11381 | } | |
11382 | ||
11383 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11384 | See lookup_dwo_cutu_unit for details. */ | |
11385 | ||
11386 | static struct dwo_unit * | |
11387 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11388 | const char *dwo_name, const char *comp_dir) | |
11389 | { | |
11390 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11391 | } | |
11392 | ||
89e63ee4 DE |
11393 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11394 | ||
11395 | static int | |
11396 | queue_and_load_dwo_tu (void **slot, void *info) | |
11397 | { | |
11398 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11399 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11400 | ULONGEST signature = dwo_unit->signature; | |
11401 | struct signatured_type *sig_type = | |
11402 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11403 | ||
11404 | if (sig_type != NULL) | |
11405 | { | |
11406 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11407 | ||
11408 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11409 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11410 | while processing PER_CU. */ | |
11411 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11412 | load_full_type_unit (sig_cu); | |
11413 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11414 | } | |
11415 | ||
11416 | return 1; | |
11417 | } | |
11418 | ||
11419 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11420 | The DWO may have the only definition of the type, though it may not be | |
11421 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11422 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11423 | ||
11424 | static void | |
11425 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11426 | { | |
11427 | struct dwo_unit *dwo_unit; | |
11428 | struct dwo_file *dwo_file; | |
11429 | ||
11430 | gdb_assert (!per_cu->is_debug_types); | |
11431 | gdb_assert (get_dwp_file () == NULL); | |
11432 | gdb_assert (per_cu->cu != NULL); | |
11433 | ||
11434 | dwo_unit = per_cu->cu->dwo_unit; | |
11435 | gdb_assert (dwo_unit != NULL); | |
11436 | ||
11437 | dwo_file = dwo_unit->dwo_file; | |
11438 | if (dwo_file->tus != NULL) | |
11439 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11440 | } | |
11441 | ||
3019eac3 DE |
11442 | /* Free all resources associated with DWO_FILE. |
11443 | Close the DWO file and munmap the sections. | |
11444 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11445 | |
11446 | static void | |
3019eac3 | 11447 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11448 | { |
348e048f | 11449 | |
5c6fa7ab | 11450 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11451 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11452 | |
3019eac3 DE |
11453 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11454 | } | |
348e048f | 11455 | |
3019eac3 | 11456 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11457 | |
3019eac3 DE |
11458 | static void |
11459 | free_dwo_file_cleanup (void *arg) | |
11460 | { | |
11461 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11462 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11463 | |
3019eac3 DE |
11464 | free_dwo_file (dwo_file, objfile); |
11465 | } | |
348e048f | 11466 | |
3019eac3 | 11467 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11468 | |
3019eac3 DE |
11469 | static int |
11470 | free_dwo_file_from_slot (void **slot, void *info) | |
11471 | { | |
11472 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11473 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11474 | |
3019eac3 | 11475 | free_dwo_file (dwo_file, objfile); |
348e048f | 11476 | |
3019eac3 DE |
11477 | return 1; |
11478 | } | |
348e048f | 11479 | |
3019eac3 | 11480 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11481 | |
3019eac3 DE |
11482 | static void |
11483 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11484 | { | |
11485 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11486 | } |
3019eac3 DE |
11487 | \f |
11488 | /* Read in various DIEs. */ | |
348e048f | 11489 | |
d389af10 JK |
11490 | /* qsort helper for inherit_abstract_dies. */ |
11491 | ||
11492 | static int | |
11493 | unsigned_int_compar (const void *ap, const void *bp) | |
11494 | { | |
11495 | unsigned int a = *(unsigned int *) ap; | |
11496 | unsigned int b = *(unsigned int *) bp; | |
11497 | ||
11498 | return (a > b) - (b > a); | |
11499 | } | |
11500 | ||
11501 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
11502 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11503 | already referenced by DW_AT_abstract_origin from the children of the | |
11504 | current DIE. */ | |
d389af10 JK |
11505 | |
11506 | static void | |
11507 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11508 | { | |
11509 | struct die_info *child_die; | |
11510 | unsigned die_children_count; | |
11511 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11512 | sect_offset *offsets; |
11513 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11514 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11515 | struct die_info *origin_die; | |
11516 | /* Iterator of the ORIGIN_DIE children. */ | |
11517 | struct die_info *origin_child_die; | |
11518 | struct cleanup *cleanups; | |
11519 | struct attribute *attr; | |
cd02d79d PA |
11520 | struct dwarf2_cu *origin_cu; |
11521 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11522 | |
11523 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11524 | if (!attr) | |
11525 | return; | |
11526 | ||
cd02d79d PA |
11527 | /* Note that following die references may follow to a die in a |
11528 | different cu. */ | |
11529 | ||
11530 | origin_cu = cu; | |
11531 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11532 | ||
11533 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11534 | symbols in. */ | |
11535 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11536 | origin_cu->list_in_scope = cu->list_in_scope; | |
11537 | ||
edb3359d DJ |
11538 | if (die->tag != origin_die->tag |
11539 | && !(die->tag == DW_TAG_inlined_subroutine | |
11540 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11541 | complaint (&symfile_complaints, |
11542 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
11543 | to_underlying (die->sect_off), |
11544 | to_underlying (origin_die->sect_off)); | |
d389af10 JK |
11545 | |
11546 | child_die = die->child; | |
11547 | die_children_count = 0; | |
11548 | while (child_die && child_die->tag) | |
11549 | { | |
11550 | child_die = sibling_die (child_die); | |
11551 | die_children_count++; | |
11552 | } | |
8d749320 | 11553 | offsets = XNEWVEC (sect_offset, die_children_count); |
d389af10 JK |
11554 | cleanups = make_cleanup (xfree, offsets); |
11555 | ||
11556 | offsets_end = offsets; | |
3ea89b92 PMR |
11557 | for (child_die = die->child; |
11558 | child_die && child_die->tag; | |
11559 | child_die = sibling_die (child_die)) | |
11560 | { | |
11561 | struct die_info *child_origin_die; | |
11562 | struct dwarf2_cu *child_origin_cu; | |
11563 | ||
11564 | /* We are trying to process concrete instance entries: | |
216f72a1 | 11565 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
11566 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
11567 | present in the abstract instance but not referenced in the concrete | |
11568 | one. */ | |
216f72a1 JK |
11569 | if (child_die->tag == DW_TAG_call_site |
11570 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
11571 | continue; |
11572 | ||
c38f313d DJ |
11573 | /* For each CHILD_DIE, find the corresponding child of |
11574 | ORIGIN_DIE. If there is more than one layer of | |
11575 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11576 | but GCC versions at least through 4.4 generate this (GCC PR | |
11577 | 40573). */ | |
3ea89b92 PMR |
11578 | child_origin_die = child_die; |
11579 | child_origin_cu = cu; | |
c38f313d DJ |
11580 | while (1) |
11581 | { | |
cd02d79d PA |
11582 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11583 | child_origin_cu); | |
c38f313d DJ |
11584 | if (attr == NULL) |
11585 | break; | |
cd02d79d PA |
11586 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11587 | &child_origin_cu); | |
c38f313d DJ |
11588 | } |
11589 | ||
d389af10 JK |
11590 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11591 | counterpart may exist. */ | |
c38f313d | 11592 | if (child_origin_die != child_die) |
d389af10 | 11593 | { |
edb3359d DJ |
11594 | if (child_die->tag != child_origin_die->tag |
11595 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11596 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11597 | complaint (&symfile_complaints, |
11598 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11599 | "different tags"), |
11600 | to_underlying (child_die->sect_off), | |
11601 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
11602 | if (child_origin_die->parent != origin_die) |
11603 | complaint (&symfile_complaints, | |
11604 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11605 | "different parents"), |
11606 | to_underlying (child_die->sect_off), | |
11607 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 11608 | else |
9c541725 | 11609 | *offsets_end++ = child_origin_die->sect_off; |
d389af10 | 11610 | } |
d389af10 JK |
11611 | } |
11612 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11613 | unsigned_int_compar); | |
11614 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 11615 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
11616 | complaint (&symfile_complaints, |
11617 | _("Multiple children of DIE 0x%x refer " | |
11618 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 11619 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 JK |
11620 | |
11621 | offsetp = offsets; | |
11622 | origin_child_die = origin_die->child; | |
11623 | while (origin_child_die && origin_child_die->tag) | |
11624 | { | |
11625 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 11626 | while (offsetp < offsets_end |
9c541725 | 11627 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 11628 | offsetp++; |
b64f50a1 | 11629 | if (offsetp >= offsets_end |
9c541725 | 11630 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 11631 | { |
adde2bff DE |
11632 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11633 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11634 | This can happen with mutually referenced abstract_origins. | |
11635 | PR 16581. */ | |
11636 | if (!origin_child_die->in_process) | |
11637 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11638 | } |
11639 | origin_child_die = sibling_die (origin_child_die); | |
11640 | } | |
cd02d79d | 11641 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11642 | |
11643 | do_cleanups (cleanups); | |
11644 | } | |
11645 | ||
c906108c | 11646 | static void |
e7c27a73 | 11647 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11648 | { |
e7c27a73 | 11649 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11650 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11651 | struct context_stack *newobj; |
c906108c SS |
11652 | CORE_ADDR lowpc; |
11653 | CORE_ADDR highpc; | |
11654 | struct die_info *child_die; | |
edb3359d | 11655 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11656 | const char *name; |
e142c38c | 11657 | CORE_ADDR baseaddr; |
801e3a5b | 11658 | struct block *block; |
edb3359d | 11659 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11660 | VEC (symbolp) *template_args = NULL; |
11661 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11662 | |
11663 | if (inlined_func) | |
11664 | { | |
11665 | /* If we do not have call site information, we can't show the | |
11666 | caller of this inlined function. That's too confusing, so | |
11667 | only use the scope for local variables. */ | |
11668 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11669 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11670 | if (call_line == NULL || call_file == NULL) | |
11671 | { | |
11672 | read_lexical_block_scope (die, cu); | |
11673 | return; | |
11674 | } | |
11675 | } | |
c906108c | 11676 | |
e142c38c DJ |
11677 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11678 | ||
94af9270 | 11679 | name = dwarf2_name (die, cu); |
c906108c | 11680 | |
e8d05480 JB |
11681 | /* Ignore functions with missing or empty names. These are actually |
11682 | illegal according to the DWARF standard. */ | |
11683 | if (name == NULL) | |
11684 | { | |
11685 | complaint (&symfile_complaints, | |
b64f50a1 | 11686 | _("missing name for subprogram DIE at %d"), |
9c541725 | 11687 | to_underlying (die->sect_off)); |
e8d05480 JB |
11688 | return; |
11689 | } | |
11690 | ||
11691 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 11692 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 11693 | <= PC_BOUNDS_INVALID) |
e8d05480 | 11694 | { |
ae4d0c03 PM |
11695 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11696 | if (!attr || !DW_UNSND (attr)) | |
11697 | complaint (&symfile_complaints, | |
3e43a32a MS |
11698 | _("cannot get low and high bounds " |
11699 | "for subprogram DIE at %d"), | |
9c541725 | 11700 | to_underlying (die->sect_off)); |
e8d05480 JB |
11701 | return; |
11702 | } | |
c906108c | 11703 | |
3e29f34a MR |
11704 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11705 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11706 | |
34eaf542 TT |
11707 | /* If we have any template arguments, then we must allocate a |
11708 | different sort of symbol. */ | |
11709 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11710 | { | |
11711 | if (child_die->tag == DW_TAG_template_type_param | |
11712 | || child_die->tag == DW_TAG_template_value_param) | |
11713 | { | |
e623cf5d | 11714 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11715 | templ_func->base.is_cplus_template_function = 1; |
11716 | break; | |
11717 | } | |
11718 | } | |
11719 | ||
fe978cb0 PA |
11720 | newobj = push_context (0, lowpc); |
11721 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11722 | (struct symbol *) templ_func); |
4c2df51b | 11723 | |
4cecd739 DJ |
11724 | /* If there is a location expression for DW_AT_frame_base, record |
11725 | it. */ | |
e142c38c | 11726 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11727 | if (attr) |
fe978cb0 | 11728 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11729 | |
63e43d3a PMR |
11730 | /* If there is a location for the static link, record it. */ |
11731 | newobj->static_link = NULL; | |
11732 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11733 | if (attr) | |
11734 | { | |
224c3ddb SM |
11735 | newobj->static_link |
11736 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11737 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11738 | } | |
11739 | ||
e142c38c | 11740 | cu->list_in_scope = &local_symbols; |
c906108c | 11741 | |
639d11d3 | 11742 | if (die->child != NULL) |
c906108c | 11743 | { |
639d11d3 | 11744 | child_die = die->child; |
c906108c SS |
11745 | while (child_die && child_die->tag) |
11746 | { | |
34eaf542 TT |
11747 | if (child_die->tag == DW_TAG_template_type_param |
11748 | || child_die->tag == DW_TAG_template_value_param) | |
11749 | { | |
11750 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11751 | ||
f1078f66 DJ |
11752 | if (arg != NULL) |
11753 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11754 | } |
11755 | else | |
11756 | process_die (child_die, cu); | |
c906108c SS |
11757 | child_die = sibling_die (child_die); |
11758 | } | |
11759 | } | |
11760 | ||
d389af10 JK |
11761 | inherit_abstract_dies (die, cu); |
11762 | ||
4a811a97 UW |
11763 | /* If we have a DW_AT_specification, we might need to import using |
11764 | directives from the context of the specification DIE. See the | |
11765 | comment in determine_prefix. */ | |
11766 | if (cu->language == language_cplus | |
11767 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11768 | { | |
11769 | struct dwarf2_cu *spec_cu = cu; | |
11770 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11771 | ||
11772 | while (spec_die) | |
11773 | { | |
11774 | child_die = spec_die->child; | |
11775 | while (child_die && child_die->tag) | |
11776 | { | |
11777 | if (child_die->tag == DW_TAG_imported_module) | |
11778 | process_die (child_die, spec_cu); | |
11779 | child_die = sibling_die (child_die); | |
11780 | } | |
11781 | ||
11782 | /* In some cases, GCC generates specification DIEs that | |
11783 | themselves contain DW_AT_specification attributes. */ | |
11784 | spec_die = die_specification (spec_die, &spec_cu); | |
11785 | } | |
11786 | } | |
11787 | ||
fe978cb0 | 11788 | newobj = pop_context (); |
c906108c | 11789 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11790 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11791 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11792 | |
df8a16a1 | 11793 | /* For C++, set the block's scope. */ |
45280282 IB |
11794 | if ((cu->language == language_cplus |
11795 | || cu->language == language_fortran | |
c44af4eb TT |
11796 | || cu->language == language_d |
11797 | || cu->language == language_rust) | |
4d4ec4e5 | 11798 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11799 | block_set_scope (block, determine_prefix (die, cu), |
11800 | &objfile->objfile_obstack); | |
df8a16a1 | 11801 | |
801e3a5b JB |
11802 | /* If we have address ranges, record them. */ |
11803 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11804 | |
fe978cb0 | 11805 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11806 | |
34eaf542 TT |
11807 | /* Attach template arguments to function. */ |
11808 | if (! VEC_empty (symbolp, template_args)) | |
11809 | { | |
11810 | gdb_assert (templ_func != NULL); | |
11811 | ||
11812 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11813 | templ_func->template_arguments | |
8d749320 SM |
11814 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11815 | templ_func->n_template_arguments); | |
34eaf542 TT |
11816 | memcpy (templ_func->template_arguments, |
11817 | VEC_address (symbolp, template_args), | |
11818 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11819 | VEC_free (symbolp, template_args); | |
11820 | } | |
11821 | ||
208d8187 JB |
11822 | /* In C++, we can have functions nested inside functions (e.g., when |
11823 | a function declares a class that has methods). This means that | |
11824 | when we finish processing a function scope, we may need to go | |
11825 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11826 | local_symbols = newobj->locals; |
22cee43f | 11827 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11828 | |
921e78cf JB |
11829 | /* If we've finished processing a top-level function, subsequent |
11830 | symbols go in the file symbol list. */ | |
11831 | if (outermost_context_p ()) | |
e142c38c | 11832 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11833 | } |
11834 | ||
11835 | /* Process all the DIES contained within a lexical block scope. Start | |
11836 | a new scope, process the dies, and then close the scope. */ | |
11837 | ||
11838 | static void | |
e7c27a73 | 11839 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11840 | { |
e7c27a73 | 11841 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11842 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11843 | struct context_stack *newobj; |
c906108c SS |
11844 | CORE_ADDR lowpc, highpc; |
11845 | struct die_info *child_die; | |
e142c38c DJ |
11846 | CORE_ADDR baseaddr; |
11847 | ||
11848 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11849 | |
11850 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11851 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11852 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11853 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11854 | describe ranges. */ |
e385593e JK |
11855 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
11856 | { | |
11857 | case PC_BOUNDS_NOT_PRESENT: | |
11858 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
11859 | there was no wrapping by that DW_TAG_lexical_block. | |
11860 | GCC does no longer produces such DWARF since GCC r224161. */ | |
11861 | for (child_die = die->child; | |
11862 | child_die != NULL && child_die->tag; | |
11863 | child_die = sibling_die (child_die)) | |
11864 | process_die (child_die, cu); | |
11865 | return; | |
11866 | case PC_BOUNDS_INVALID: | |
11867 | return; | |
11868 | } | |
3e29f34a MR |
11869 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11870 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11871 | |
11872 | push_context (0, lowpc); | |
639d11d3 | 11873 | if (die->child != NULL) |
c906108c | 11874 | { |
639d11d3 | 11875 | child_die = die->child; |
c906108c SS |
11876 | while (child_die && child_die->tag) |
11877 | { | |
e7c27a73 | 11878 | process_die (child_die, cu); |
c906108c SS |
11879 | child_die = sibling_die (child_die); |
11880 | } | |
11881 | } | |
3ea89b92 | 11882 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11883 | newobj = pop_context (); |
c906108c | 11884 | |
22cee43f | 11885 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11886 | { |
801e3a5b | 11887 | struct block *block |
63e43d3a | 11888 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11889 | newobj->start_addr, highpc); |
801e3a5b JB |
11890 | |
11891 | /* Note that recording ranges after traversing children, as we | |
11892 | do here, means that recording a parent's ranges entails | |
11893 | walking across all its children's ranges as they appear in | |
11894 | the address map, which is quadratic behavior. | |
11895 | ||
11896 | It would be nicer to record the parent's ranges before | |
11897 | traversing its children, simply overriding whatever you find | |
11898 | there. But since we don't even decide whether to create a | |
11899 | block until after we've traversed its children, that's hard | |
11900 | to do. */ | |
11901 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11902 | } |
fe978cb0 | 11903 | local_symbols = newobj->locals; |
22cee43f | 11904 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11905 | } |
11906 | ||
216f72a1 | 11907 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
11908 | |
11909 | static void | |
11910 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11911 | { | |
11912 | struct objfile *objfile = cu->objfile; | |
11913 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11914 | CORE_ADDR pc, baseaddr; | |
11915 | struct attribute *attr; | |
11916 | struct call_site *call_site, call_site_local; | |
11917 | void **slot; | |
11918 | int nparams; | |
11919 | struct die_info *child_die; | |
11920 | ||
11921 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11922 | ||
216f72a1 JK |
11923 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
11924 | if (attr == NULL) | |
11925 | { | |
11926 | /* This was a pre-DWARF-5 GNU extension alias | |
11927 | for DW_AT_call_return_pc. */ | |
11928 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11929 | } | |
96408a79 SA |
11930 | if (!attr) |
11931 | { | |
11932 | complaint (&symfile_complaints, | |
216f72a1 | 11933 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 11934 | "DIE 0x%x [in module %s]"), |
9c541725 | 11935 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
11936 | return; |
11937 | } | |
31aa7e4e | 11938 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11939 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11940 | |
11941 | if (cu->call_site_htab == NULL) | |
11942 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11943 | NULL, &objfile->objfile_obstack, | |
11944 | hashtab_obstack_allocate, NULL); | |
11945 | call_site_local.pc = pc; | |
11946 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11947 | if (*slot != NULL) | |
11948 | { | |
11949 | complaint (&symfile_complaints, | |
216f72a1 | 11950 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 11951 | "DIE 0x%x [in module %s]"), |
9c541725 | 11952 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 11953 | objfile_name (objfile)); |
96408a79 SA |
11954 | return; |
11955 | } | |
11956 | ||
11957 | /* Count parameters at the caller. */ | |
11958 | ||
11959 | nparams = 0; | |
11960 | for (child_die = die->child; child_die && child_die->tag; | |
11961 | child_die = sibling_die (child_die)) | |
11962 | { | |
216f72a1 JK |
11963 | if (child_die->tag != DW_TAG_call_site_parameter |
11964 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
11965 | { |
11966 | complaint (&symfile_complaints, | |
216f72a1 JK |
11967 | _("Tag %d is not DW_TAG_call_site_parameter in " |
11968 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 11969 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 11970 | objfile_name (objfile)); |
96408a79 SA |
11971 | continue; |
11972 | } | |
11973 | ||
11974 | nparams++; | |
11975 | } | |
11976 | ||
224c3ddb SM |
11977 | call_site |
11978 | = ((struct call_site *) | |
11979 | obstack_alloc (&objfile->objfile_obstack, | |
11980 | sizeof (*call_site) | |
11981 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11982 | *slot = call_site; |
11983 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11984 | call_site->pc = pc; | |
11985 | ||
216f72a1 JK |
11986 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
11987 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
11988 | { |
11989 | struct die_info *func_die; | |
11990 | ||
11991 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11992 | for (func_die = die->parent; | |
11993 | func_die && func_die->tag != DW_TAG_subprogram | |
11994 | && func_die->tag != DW_TAG_subroutine_type; | |
11995 | func_die = func_die->parent); | |
11996 | ||
216f72a1 JK |
11997 | /* DW_AT_call_all_calls is a superset |
11998 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 11999 | if (func_die |
216f72a1 | 12000 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12001 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12002 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12003 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12004 | { | |
12005 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12006 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12007 | both the initial caller containing the real return address PC and | |
12008 | the final callee containing the current PC of a chain of tail | |
12009 | calls do not need to have the tail call list complete. But any | |
12010 | function candidate for a virtual tail call frame searched via | |
12011 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12012 | determined unambiguously. */ | |
12013 | } | |
12014 | else | |
12015 | { | |
12016 | struct type *func_type = NULL; | |
12017 | ||
12018 | if (func_die) | |
12019 | func_type = get_die_type (func_die, cu); | |
12020 | if (func_type != NULL) | |
12021 | { | |
12022 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12023 | ||
12024 | /* Enlist this call site to the function. */ | |
12025 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12026 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12027 | } | |
12028 | else | |
12029 | complaint (&symfile_complaints, | |
216f72a1 | 12030 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12031 | "DIE 0x%x [in module %s]"), |
9c541725 | 12032 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12033 | } |
12034 | } | |
12035 | ||
216f72a1 JK |
12036 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12037 | if (attr == NULL) | |
12038 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12039 | if (attr == NULL) | |
12040 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12041 | if (attr == NULL) |
216f72a1 JK |
12042 | { |
12043 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12044 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12045 | } | |
96408a79 SA |
12046 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12047 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12048 | /* Keep NULL DWARF_BLOCK. */; | |
12049 | else if (attr_form_is_block (attr)) | |
12050 | { | |
12051 | struct dwarf2_locexpr_baton *dlbaton; | |
12052 | ||
8d749320 | 12053 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12054 | dlbaton->data = DW_BLOCK (attr)->data; |
12055 | dlbaton->size = DW_BLOCK (attr)->size; | |
12056 | dlbaton->per_cu = cu->per_cu; | |
12057 | ||
12058 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12059 | } | |
7771576e | 12060 | else if (attr_form_is_ref (attr)) |
96408a79 | 12061 | { |
96408a79 SA |
12062 | struct dwarf2_cu *target_cu = cu; |
12063 | struct die_info *target_die; | |
12064 | ||
ac9ec31b | 12065 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12066 | gdb_assert (target_cu->objfile == objfile); |
12067 | if (die_is_declaration (target_die, target_cu)) | |
12068 | { | |
7d45c7c3 | 12069 | const char *target_physname; |
9112db09 JK |
12070 | |
12071 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12072 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12073 | if (target_physname == NULL) |
9112db09 | 12074 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12075 | if (target_physname == NULL) |
12076 | complaint (&symfile_complaints, | |
216f72a1 | 12077 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12078 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12079 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12080 | else |
7d455152 | 12081 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12082 | } |
12083 | else | |
12084 | { | |
12085 | CORE_ADDR lowpc; | |
12086 | ||
12087 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12088 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12089 | <= PC_BOUNDS_INVALID) |
96408a79 | 12090 | complaint (&symfile_complaints, |
216f72a1 | 12091 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12092 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12093 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12094 | else |
3e29f34a MR |
12095 | { |
12096 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12097 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12098 | } | |
96408a79 SA |
12099 | } |
12100 | } | |
12101 | else | |
12102 | complaint (&symfile_complaints, | |
216f72a1 | 12103 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12104 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12105 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12106 | |
12107 | call_site->per_cu = cu->per_cu; | |
12108 | ||
12109 | for (child_die = die->child; | |
12110 | child_die && child_die->tag; | |
12111 | child_die = sibling_die (child_die)) | |
12112 | { | |
96408a79 | 12113 | struct call_site_parameter *parameter; |
1788b2d3 | 12114 | struct attribute *loc, *origin; |
96408a79 | 12115 | |
216f72a1 JK |
12116 | if (child_die->tag != DW_TAG_call_site_parameter |
12117 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12118 | { |
12119 | /* Already printed the complaint above. */ | |
12120 | continue; | |
12121 | } | |
12122 | ||
12123 | gdb_assert (call_site->parameter_count < nparams); | |
12124 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12125 | ||
1788b2d3 JK |
12126 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12127 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12128 | register is contained in DW_AT_call_value. */ |
96408a79 | 12129 | |
24c5c679 | 12130 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12131 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12132 | if (origin == NULL) | |
12133 | { | |
12134 | /* This was a pre-DWARF-5 GNU extension alias | |
12135 | for DW_AT_call_parameter. */ | |
12136 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12137 | } | |
7771576e | 12138 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12139 | { |
1788b2d3 | 12140 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12141 | |
12142 | sect_offset sect_off | |
12143 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12144 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12145 | { |
12146 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12147 | binding can be done only inside one CU. Such referenced DIE | |
12148 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12149 | complaint (&symfile_complaints, | |
216f72a1 JK |
12150 | _("DW_AT_call_parameter offset is not in CU for " |
12151 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12152 | to_underlying (child_die->sect_off), |
12153 | objfile_name (objfile)); | |
d76b7dbc JK |
12154 | continue; |
12155 | } | |
9c541725 PA |
12156 | parameter->u.param_cu_off |
12157 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12158 | } |
12159 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12160 | { |
12161 | complaint (&symfile_complaints, | |
12162 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12163 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12164 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12165 | continue; |
12166 | } | |
24c5c679 | 12167 | else |
96408a79 | 12168 | { |
24c5c679 JK |
12169 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12170 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12171 | if (parameter->u.dwarf_reg != -1) | |
12172 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12173 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12174 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12175 | ¶meter->u.fb_offset)) | |
12176 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12177 | else | |
12178 | { | |
12179 | complaint (&symfile_complaints, | |
12180 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12181 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12182 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12183 | "[in module %s]"), |
9c541725 PA |
12184 | to_underlying (child_die->sect_off), |
12185 | objfile_name (objfile)); | |
24c5c679 JK |
12186 | continue; |
12187 | } | |
96408a79 SA |
12188 | } |
12189 | ||
216f72a1 JK |
12190 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12191 | if (attr == NULL) | |
12192 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12193 | if (!attr_form_is_block (attr)) |
12194 | { | |
12195 | complaint (&symfile_complaints, | |
216f72a1 JK |
12196 | _("No DW_FORM_block* DW_AT_call_value for " |
12197 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12198 | to_underlying (child_die->sect_off), |
12199 | objfile_name (objfile)); | |
96408a79 SA |
12200 | continue; |
12201 | } | |
12202 | parameter->value = DW_BLOCK (attr)->data; | |
12203 | parameter->value_size = DW_BLOCK (attr)->size; | |
12204 | ||
12205 | /* Parameters are not pre-cleared by memset above. */ | |
12206 | parameter->data_value = NULL; | |
12207 | parameter->data_value_size = 0; | |
12208 | call_site->parameter_count++; | |
12209 | ||
216f72a1 JK |
12210 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12211 | if (attr == NULL) | |
12212 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12213 | if (attr) |
12214 | { | |
12215 | if (!attr_form_is_block (attr)) | |
12216 | complaint (&symfile_complaints, | |
216f72a1 JK |
12217 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12218 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12219 | to_underlying (child_die->sect_off), |
12220 | objfile_name (objfile)); | |
96408a79 SA |
12221 | else |
12222 | { | |
12223 | parameter->data_value = DW_BLOCK (attr)->data; | |
12224 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
12225 | } | |
12226 | } | |
12227 | } | |
12228 | } | |
12229 | ||
43988095 JK |
12230 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
12231 | reading .debug_rnglists. | |
12232 | Callback's type should be: | |
12233 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12234 | Return true if the attributes are present and valid, otherwise, | |
12235 | return false. */ | |
12236 | ||
12237 | template <typename Callback> | |
12238 | static bool | |
12239 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
12240 | Callback &&callback) | |
12241 | { | |
12242 | struct objfile *objfile = cu->objfile; | |
12243 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12244 | struct comp_unit_head *cu_header = &cu->header; | |
12245 | bfd *obfd = objfile->obfd; | |
12246 | unsigned int addr_size = cu_header->addr_size; | |
12247 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12248 | /* Base address selection entry. */ | |
12249 | CORE_ADDR base; | |
12250 | int found_base; | |
12251 | unsigned int dummy; | |
12252 | const gdb_byte *buffer; | |
12253 | CORE_ADDR low = 0; | |
12254 | CORE_ADDR high = 0; | |
12255 | CORE_ADDR baseaddr; | |
12256 | bool overflow = false; | |
12257 | ||
12258 | found_base = cu->base_known; | |
12259 | base = cu->base_address; | |
12260 | ||
12261 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
12262 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
12263 | { | |
12264 | complaint (&symfile_complaints, | |
12265 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12266 | offset); | |
12267 | return false; | |
12268 | } | |
12269 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
12270 | ||
12271 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12272 | ||
12273 | while (1) | |
12274 | { | |
7814882a JK |
12275 | /* Initialize it due to a false compiler warning. */ |
12276 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
12277 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
12278 | + dwarf2_per_objfile->rnglists.size); | |
12279 | unsigned int bytes_read; | |
12280 | ||
12281 | if (buffer == buf_end) | |
12282 | { | |
12283 | overflow = true; | |
12284 | break; | |
12285 | } | |
12286 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
12287 | switch (rlet) | |
12288 | { | |
12289 | case DW_RLE_end_of_list: | |
12290 | break; | |
12291 | case DW_RLE_base_address: | |
12292 | if (buffer + cu->header.addr_size > buf_end) | |
12293 | { | |
12294 | overflow = true; | |
12295 | break; | |
12296 | } | |
12297 | base = read_address (obfd, buffer, cu, &bytes_read); | |
12298 | found_base = 1; | |
12299 | buffer += bytes_read; | |
12300 | break; | |
12301 | case DW_RLE_start_length: | |
12302 | if (buffer + cu->header.addr_size > buf_end) | |
12303 | { | |
12304 | overflow = true; | |
12305 | break; | |
12306 | } | |
12307 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12308 | buffer += bytes_read; | |
12309 | range_end = (range_beginning | |
12310 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
12311 | buffer += bytes_read; | |
12312 | if (buffer > buf_end) | |
12313 | { | |
12314 | overflow = true; | |
12315 | break; | |
12316 | } | |
12317 | break; | |
12318 | case DW_RLE_offset_pair: | |
12319 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12320 | buffer += bytes_read; | |
12321 | if (buffer > buf_end) | |
12322 | { | |
12323 | overflow = true; | |
12324 | break; | |
12325 | } | |
12326 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12327 | buffer += bytes_read; | |
12328 | if (buffer > buf_end) | |
12329 | { | |
12330 | overflow = true; | |
12331 | break; | |
12332 | } | |
12333 | break; | |
12334 | case DW_RLE_start_end: | |
12335 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
12336 | { | |
12337 | overflow = true; | |
12338 | break; | |
12339 | } | |
12340 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12341 | buffer += bytes_read; | |
12342 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
12343 | buffer += bytes_read; | |
12344 | break; | |
12345 | default: | |
12346 | complaint (&symfile_complaints, | |
12347 | _("Invalid .debug_rnglists data (no base address)")); | |
12348 | return false; | |
12349 | } | |
12350 | if (rlet == DW_RLE_end_of_list || overflow) | |
12351 | break; | |
12352 | if (rlet == DW_RLE_base_address) | |
12353 | continue; | |
12354 | ||
12355 | if (!found_base) | |
12356 | { | |
12357 | /* We have no valid base address for the ranges | |
12358 | data. */ | |
12359 | complaint (&symfile_complaints, | |
12360 | _("Invalid .debug_rnglists data (no base address)")); | |
12361 | return false; | |
12362 | } | |
12363 | ||
12364 | if (range_beginning > range_end) | |
12365 | { | |
12366 | /* Inverted range entries are invalid. */ | |
12367 | complaint (&symfile_complaints, | |
12368 | _("Invalid .debug_rnglists data (inverted range)")); | |
12369 | return false; | |
12370 | } | |
12371 | ||
12372 | /* Empty range entries have no effect. */ | |
12373 | if (range_beginning == range_end) | |
12374 | continue; | |
12375 | ||
12376 | range_beginning += base; | |
12377 | range_end += base; | |
12378 | ||
12379 | /* A not-uncommon case of bad debug info. | |
12380 | Don't pollute the addrmap with bad data. */ | |
12381 | if (range_beginning + baseaddr == 0 | |
12382 | && !dwarf2_per_objfile->has_section_at_zero) | |
12383 | { | |
12384 | complaint (&symfile_complaints, | |
12385 | _(".debug_rnglists entry has start address of zero" | |
12386 | " [in module %s]"), objfile_name (objfile)); | |
12387 | continue; | |
12388 | } | |
12389 | ||
12390 | callback (range_beginning, range_end); | |
12391 | } | |
12392 | ||
12393 | if (overflow) | |
12394 | { | |
12395 | complaint (&symfile_complaints, | |
12396 | _("Offset %d is not terminated " | |
12397 | "for DW_AT_ranges attribute"), | |
12398 | offset); | |
12399 | return false; | |
12400 | } | |
12401 | ||
12402 | return true; | |
12403 | } | |
12404 | ||
12405 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
12406 | Callback's type should be: | |
12407 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 12408 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 12409 | |
43988095 | 12410 | template <typename Callback> |
43039443 | 12411 | static int |
5f46c5a5 | 12412 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 12413 | Callback &&callback) |
43039443 JK |
12414 | { |
12415 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 12416 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
12417 | struct comp_unit_head *cu_header = &cu->header; |
12418 | bfd *obfd = objfile->obfd; | |
12419 | unsigned int addr_size = cu_header->addr_size; | |
12420 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12421 | /* Base address selection entry. */ | |
12422 | CORE_ADDR base; | |
12423 | int found_base; | |
12424 | unsigned int dummy; | |
d521ce57 | 12425 | const gdb_byte *buffer; |
ff013f42 | 12426 | CORE_ADDR baseaddr; |
43039443 | 12427 | |
43988095 JK |
12428 | if (cu_header->version >= 5) |
12429 | return dwarf2_rnglists_process (offset, cu, callback); | |
12430 | ||
d00adf39 DE |
12431 | found_base = cu->base_known; |
12432 | base = cu->base_address; | |
43039443 | 12433 | |
be391dca | 12434 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12435 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
12436 | { |
12437 | complaint (&symfile_complaints, | |
12438 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12439 | offset); | |
12440 | return 0; | |
12441 | } | |
dce234bc | 12442 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 12443 | |
e7030f15 | 12444 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 12445 | |
43039443 JK |
12446 | while (1) |
12447 | { | |
12448 | CORE_ADDR range_beginning, range_end; | |
12449 | ||
12450 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
12451 | buffer += addr_size; | |
12452 | range_end = read_address (obfd, buffer, cu, &dummy); | |
12453 | buffer += addr_size; | |
12454 | offset += 2 * addr_size; | |
12455 | ||
12456 | /* An end of list marker is a pair of zero addresses. */ | |
12457 | if (range_beginning == 0 && range_end == 0) | |
12458 | /* Found the end of list entry. */ | |
12459 | break; | |
12460 | ||
12461 | /* Each base address selection entry is a pair of 2 values. | |
12462 | The first is the largest possible address, the second is | |
12463 | the base address. Check for a base address here. */ | |
12464 | if ((range_beginning & mask) == mask) | |
12465 | { | |
28d2bfb9 AB |
12466 | /* If we found the largest possible address, then we already |
12467 | have the base address in range_end. */ | |
12468 | base = range_end; | |
43039443 JK |
12469 | found_base = 1; |
12470 | continue; | |
12471 | } | |
12472 | ||
12473 | if (!found_base) | |
12474 | { | |
12475 | /* We have no valid base address for the ranges | |
12476 | data. */ | |
12477 | complaint (&symfile_complaints, | |
12478 | _("Invalid .debug_ranges data (no base address)")); | |
12479 | return 0; | |
12480 | } | |
12481 | ||
9277c30c UW |
12482 | if (range_beginning > range_end) |
12483 | { | |
12484 | /* Inverted range entries are invalid. */ | |
12485 | complaint (&symfile_complaints, | |
12486 | _("Invalid .debug_ranges data (inverted range)")); | |
12487 | return 0; | |
12488 | } | |
12489 | ||
12490 | /* Empty range entries have no effect. */ | |
12491 | if (range_beginning == range_end) | |
12492 | continue; | |
12493 | ||
43039443 JK |
12494 | range_beginning += base; |
12495 | range_end += base; | |
12496 | ||
01093045 DE |
12497 | /* A not-uncommon case of bad debug info. |
12498 | Don't pollute the addrmap with bad data. */ | |
12499 | if (range_beginning + baseaddr == 0 | |
12500 | && !dwarf2_per_objfile->has_section_at_zero) | |
12501 | { | |
12502 | complaint (&symfile_complaints, | |
12503 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12504 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12505 | continue; |
12506 | } | |
12507 | ||
5f46c5a5 JK |
12508 | callback (range_beginning, range_end); |
12509 | } | |
12510 | ||
12511 | return 1; | |
12512 | } | |
12513 | ||
12514 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
12515 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
12516 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
12517 | ||
12518 | static int | |
12519 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
12520 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
12521 | struct partial_symtab *ranges_pst) | |
12522 | { | |
12523 | struct objfile *objfile = cu->objfile; | |
12524 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12525 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
12526 | SECT_OFF_TEXT (objfile)); | |
12527 | int low_set = 0; | |
12528 | CORE_ADDR low = 0; | |
12529 | CORE_ADDR high = 0; | |
12530 | int retval; | |
12531 | ||
12532 | retval = dwarf2_ranges_process (offset, cu, | |
12533 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12534 | { | |
9277c30c | 12535 | if (ranges_pst != NULL) |
3e29f34a MR |
12536 | { |
12537 | CORE_ADDR lowpc; | |
12538 | CORE_ADDR highpc; | |
12539 | ||
12540 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12541 | range_beginning + baseaddr); | |
12542 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12543 | range_end + baseaddr); | |
12544 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
12545 | ranges_pst); | |
12546 | } | |
ff013f42 | 12547 | |
43039443 JK |
12548 | /* FIXME: This is recording everything as a low-high |
12549 | segment of consecutive addresses. We should have a | |
12550 | data structure for discontiguous block ranges | |
12551 | instead. */ | |
12552 | if (! low_set) | |
12553 | { | |
12554 | low = range_beginning; | |
12555 | high = range_end; | |
12556 | low_set = 1; | |
12557 | } | |
12558 | else | |
12559 | { | |
12560 | if (range_beginning < low) | |
12561 | low = range_beginning; | |
12562 | if (range_end > high) | |
12563 | high = range_end; | |
12564 | } | |
5f46c5a5 JK |
12565 | }); |
12566 | if (!retval) | |
12567 | return 0; | |
43039443 JK |
12568 | |
12569 | if (! low_set) | |
12570 | /* If the first entry is an end-of-list marker, the range | |
12571 | describes an empty scope, i.e. no instructions. */ | |
12572 | return 0; | |
12573 | ||
12574 | if (low_return) | |
12575 | *low_return = low; | |
12576 | if (high_return) | |
12577 | *high_return = high; | |
12578 | return 1; | |
12579 | } | |
12580 | ||
3a2b436a JK |
12581 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
12582 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 12583 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 12584 | |
3a2b436a | 12585 | static enum pc_bounds_kind |
af34e669 | 12586 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12587 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12588 | struct partial_symtab *pst) | |
c906108c SS |
12589 | { |
12590 | struct attribute *attr; | |
91da1414 | 12591 | struct attribute *attr_high; |
af34e669 DJ |
12592 | CORE_ADDR low = 0; |
12593 | CORE_ADDR high = 0; | |
e385593e | 12594 | enum pc_bounds_kind ret; |
c906108c | 12595 | |
91da1414 MW |
12596 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12597 | if (attr_high) | |
af34e669 | 12598 | { |
e142c38c | 12599 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12600 | if (attr) |
91da1414 | 12601 | { |
31aa7e4e JB |
12602 | low = attr_value_as_address (attr); |
12603 | high = attr_value_as_address (attr_high); | |
12604 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12605 | high += low; | |
91da1414 | 12606 | } |
af34e669 DJ |
12607 | else |
12608 | /* Found high w/o low attribute. */ | |
e385593e | 12609 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
12610 | |
12611 | /* Found consecutive range of addresses. */ | |
3a2b436a | 12612 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 12613 | } |
c906108c | 12614 | else |
af34e669 | 12615 | { |
e142c38c | 12616 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12617 | if (attr != NULL) |
12618 | { | |
ab435259 DE |
12619 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12620 | We take advantage of the fact that DW_AT_ranges does not appear | |
12621 | in DW_TAG_compile_unit of DWO files. */ | |
12622 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12623 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12624 | + (need_ranges_base | |
12625 | ? cu->ranges_base | |
12626 | : 0)); | |
2e3cf129 | 12627 | |
af34e669 | 12628 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12629 | .debug_ranges section. */ |
2e3cf129 | 12630 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 12631 | return PC_BOUNDS_INVALID; |
43039443 | 12632 | /* Found discontinuous range of addresses. */ |
3a2b436a | 12633 | ret = PC_BOUNDS_RANGES; |
af34e669 | 12634 | } |
e385593e JK |
12635 | else |
12636 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 12637 | } |
c906108c | 12638 | |
9373cf26 JK |
12639 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12640 | if (high <= low) | |
e385593e | 12641 | return PC_BOUNDS_INVALID; |
c906108c SS |
12642 | |
12643 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12644 | eliminate duplicate copies of functions and vtables and such. | |
12645 | The linker will arbitrarily choose one and discard the others. | |
12646 | The AT_*_pc values for such functions refer to local labels in | |
12647 | these sections. If the section from that file was discarded, the | |
12648 | labels are not in the output, so the relocs get a value of 0. | |
12649 | If this is a discarded function, mark the pc bounds as invalid, | |
12650 | so that GDB will ignore it. */ | |
72dca2f5 | 12651 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 12652 | return PC_BOUNDS_INVALID; |
c906108c SS |
12653 | |
12654 | *lowpc = low; | |
96408a79 SA |
12655 | if (highpc) |
12656 | *highpc = high; | |
af34e669 | 12657 | return ret; |
c906108c SS |
12658 | } |
12659 | ||
b084d499 JB |
12660 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12661 | its low and high PC addresses. Do nothing if these addresses could not | |
12662 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12663 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12664 | ||
12665 | static void | |
12666 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12667 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12668 | struct dwarf2_cu *cu) | |
12669 | { | |
12670 | CORE_ADDR low, high; | |
12671 | struct die_info *child = die->child; | |
12672 | ||
e385593e | 12673 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 12674 | { |
325fac50 PA |
12675 | *lowpc = std::min (*lowpc, low); |
12676 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
12677 | } |
12678 | ||
12679 | /* If the language does not allow nested subprograms (either inside | |
12680 | subprograms or lexical blocks), we're done. */ | |
12681 | if (cu->language != language_ada) | |
12682 | return; | |
6e70227d | 12683 | |
b084d499 JB |
12684 | /* Check all the children of the given DIE. If it contains nested |
12685 | subprograms, then check their pc bounds. Likewise, we need to | |
12686 | check lexical blocks as well, as they may also contain subprogram | |
12687 | definitions. */ | |
12688 | while (child && child->tag) | |
12689 | { | |
12690 | if (child->tag == DW_TAG_subprogram | |
12691 | || child->tag == DW_TAG_lexical_block) | |
12692 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12693 | child = sibling_die (child); | |
12694 | } | |
12695 | } | |
12696 | ||
fae299cd DC |
12697 | /* Get the low and high pc's represented by the scope DIE, and store |
12698 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12699 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12700 | ||
12701 | static void | |
12702 | get_scope_pc_bounds (struct die_info *die, | |
12703 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12704 | struct dwarf2_cu *cu) | |
12705 | { | |
12706 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12707 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12708 | CORE_ADDR current_low, current_high; | |
12709 | ||
3a2b436a | 12710 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 12711 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
12712 | { |
12713 | best_low = current_low; | |
12714 | best_high = current_high; | |
12715 | } | |
12716 | else | |
12717 | { | |
12718 | struct die_info *child = die->child; | |
12719 | ||
12720 | while (child && child->tag) | |
12721 | { | |
12722 | switch (child->tag) { | |
12723 | case DW_TAG_subprogram: | |
b084d499 | 12724 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12725 | break; |
12726 | case DW_TAG_namespace: | |
f55ee35c | 12727 | case DW_TAG_module: |
fae299cd DC |
12728 | /* FIXME: carlton/2004-01-16: Should we do this for |
12729 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12730 | that current GCC's always emit the DIEs corresponding | |
12731 | to definitions of methods of classes as children of a | |
12732 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12733 | the DIEs giving the declarations, which could be | |
12734 | anywhere). But I don't see any reason why the | |
12735 | standards says that they have to be there. */ | |
12736 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12737 | ||
12738 | if (current_low != ((CORE_ADDR) -1)) | |
12739 | { | |
325fac50 PA |
12740 | best_low = std::min (best_low, current_low); |
12741 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
12742 | } |
12743 | break; | |
12744 | default: | |
0963b4bd | 12745 | /* Ignore. */ |
fae299cd DC |
12746 | break; |
12747 | } | |
12748 | ||
12749 | child = sibling_die (child); | |
12750 | } | |
12751 | } | |
12752 | ||
12753 | *lowpc = best_low; | |
12754 | *highpc = best_high; | |
12755 | } | |
12756 | ||
801e3a5b JB |
12757 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12758 | in DIE. */ | |
380bca97 | 12759 | |
801e3a5b JB |
12760 | static void |
12761 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12762 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12763 | { | |
bb5ed363 | 12764 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12765 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12766 | struct attribute *attr; |
91da1414 | 12767 | struct attribute *attr_high; |
801e3a5b | 12768 | |
91da1414 MW |
12769 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12770 | if (attr_high) | |
801e3a5b | 12771 | { |
801e3a5b JB |
12772 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12773 | if (attr) | |
12774 | { | |
31aa7e4e JB |
12775 | CORE_ADDR low = attr_value_as_address (attr); |
12776 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12777 | ||
12778 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12779 | high += low; | |
9a619af0 | 12780 | |
3e29f34a MR |
12781 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12782 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12783 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12784 | } |
12785 | } | |
12786 | ||
12787 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12788 | if (attr) | |
12789 | { | |
bb5ed363 | 12790 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12791 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12792 | We take advantage of the fact that DW_AT_ranges does not appear | |
12793 | in DW_TAG_compile_unit of DWO files. */ | |
12794 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12795 | |
12796 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12797 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12798 | unsigned long offset = (DW_UNSND (attr) |
12799 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12800 | const gdb_byte *buffer; |
801e3a5b JB |
12801 | |
12802 | /* For some target architectures, but not others, the | |
12803 | read_address function sign-extends the addresses it returns. | |
12804 | To recognize base address selection entries, we need a | |
12805 | mask. */ | |
12806 | unsigned int addr_size = cu->header.addr_size; | |
12807 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12808 | ||
12809 | /* The base address, to which the next pair is relative. Note | |
12810 | that this 'base' is a DWARF concept: most entries in a range | |
12811 | list are relative, to reduce the number of relocs against the | |
12812 | debugging information. This is separate from this function's | |
12813 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12814 | information from a shared library based on the address at | |
12815 | which the library was loaded. */ | |
d00adf39 DE |
12816 | CORE_ADDR base = cu->base_address; |
12817 | int base_known = cu->base_known; | |
801e3a5b | 12818 | |
5f46c5a5 JK |
12819 | dwarf2_ranges_process (offset, cu, |
12820 | [&] (CORE_ADDR start, CORE_ADDR end) | |
12821 | { | |
58fdfd2c JK |
12822 | start += baseaddr; |
12823 | end += baseaddr; | |
5f46c5a5 JK |
12824 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12825 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
12826 | record_block_range (block, start, end - 1); | |
12827 | }); | |
801e3a5b JB |
12828 | } |
12829 | } | |
12830 | ||
685b1105 JK |
12831 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12832 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12833 | |
685b1105 JK |
12834 | static void |
12835 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 12836 | { |
38360086 | 12837 | int major, minor; |
60d5a603 JK |
12838 | |
12839 | if (cu->producer == NULL) | |
12840 | { | |
12841 | /* For unknown compilers expect their behavior is DWARF version | |
12842 | compliant. | |
12843 | ||
12844 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12845 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12846 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12847 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12848 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12849 | } |
b1ffba5a | 12850 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12851 | { |
38360086 MW |
12852 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12853 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12854 | } |
61012eef | 12855 | else if (startswith (cu->producer, "Intel(R) C")) |
685b1105 JK |
12856 | cu->producer_is_icc = 1; |
12857 | else | |
12858 | { | |
12859 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12860 | compliant. */ | |
60d5a603 JK |
12861 | } |
12862 | ||
ba919b58 | 12863 | cu->checked_producer = 1; |
685b1105 | 12864 | } |
ba919b58 | 12865 | |
685b1105 JK |
12866 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12867 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12868 | during 4.6.0 experimental. */ | |
12869 | ||
12870 | static int | |
12871 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12872 | { | |
12873 | if (!cu->checked_producer) | |
12874 | check_producer (cu); | |
12875 | ||
12876 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12877 | } |
12878 | ||
12879 | /* Return the default accessibility type if it is not overriden by | |
12880 | DW_AT_accessibility. */ | |
12881 | ||
12882 | static enum dwarf_access_attribute | |
12883 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12884 | { | |
12885 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12886 | { | |
12887 | /* The default DWARF 2 accessibility for members is public, the default | |
12888 | accessibility for inheritance is private. */ | |
12889 | ||
12890 | if (die->tag != DW_TAG_inheritance) | |
12891 | return DW_ACCESS_public; | |
12892 | else | |
12893 | return DW_ACCESS_private; | |
12894 | } | |
12895 | else | |
12896 | { | |
12897 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12898 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12899 | depends on the container kind. */ | |
12900 | ||
12901 | if (die->parent->tag == DW_TAG_class_type) | |
12902 | return DW_ACCESS_private; | |
12903 | else | |
12904 | return DW_ACCESS_public; | |
12905 | } | |
12906 | } | |
12907 | ||
74ac6d43 TT |
12908 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12909 | offset. If the attribute was not found return 0, otherwise return | |
12910 | 1. If it was found but could not properly be handled, set *OFFSET | |
12911 | to 0. */ | |
12912 | ||
12913 | static int | |
12914 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12915 | LONGEST *offset) | |
12916 | { | |
12917 | struct attribute *attr; | |
12918 | ||
12919 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12920 | if (attr != NULL) | |
12921 | { | |
12922 | *offset = 0; | |
12923 | ||
12924 | /* Note that we do not check for a section offset first here. | |
12925 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12926 | so if we see it, we can assume that a constant form is really | |
12927 | a constant and not a section offset. */ | |
12928 | if (attr_form_is_constant (attr)) | |
12929 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12930 | else if (attr_form_is_section_offset (attr)) | |
12931 | dwarf2_complex_location_expr_complaint (); | |
12932 | else if (attr_form_is_block (attr)) | |
12933 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12934 | else | |
12935 | dwarf2_complex_location_expr_complaint (); | |
12936 | ||
12937 | return 1; | |
12938 | } | |
12939 | ||
12940 | return 0; | |
12941 | } | |
12942 | ||
c906108c SS |
12943 | /* Add an aggregate field to the field list. */ |
12944 | ||
12945 | static void | |
107d2387 | 12946 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12947 | struct dwarf2_cu *cu) |
6e70227d | 12948 | { |
e7c27a73 | 12949 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12950 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12951 | struct nextfield *new_field; |
12952 | struct attribute *attr; | |
12953 | struct field *fp; | |
15d034d0 | 12954 | const char *fieldname = ""; |
c906108c SS |
12955 | |
12956 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12957 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12958 | make_cleanup (xfree, new_field); |
c906108c | 12959 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12960 | |
12961 | if (die->tag == DW_TAG_inheritance) | |
12962 | { | |
12963 | new_field->next = fip->baseclasses; | |
12964 | fip->baseclasses = new_field; | |
12965 | } | |
12966 | else | |
12967 | { | |
12968 | new_field->next = fip->fields; | |
12969 | fip->fields = new_field; | |
12970 | } | |
c906108c SS |
12971 | fip->nfields++; |
12972 | ||
e142c38c | 12973 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12974 | if (attr) |
12975 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12976 | else |
12977 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12978 | if (new_field->accessibility != DW_ACCESS_public) |
12979 | fip->non_public_fields = 1; | |
60d5a603 | 12980 | |
e142c38c | 12981 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12982 | if (attr) |
12983 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12984 | else |
12985 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12986 | |
12987 | fp = &new_field->field; | |
a9a9bd0f | 12988 | |
e142c38c | 12989 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12990 | { |
74ac6d43 TT |
12991 | LONGEST offset; |
12992 | ||
a9a9bd0f | 12993 | /* Data member other than a C++ static data member. */ |
6e70227d | 12994 | |
c906108c | 12995 | /* Get type of field. */ |
e7c27a73 | 12996 | fp->type = die_type (die, cu); |
c906108c | 12997 | |
d6a843b5 | 12998 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12999 | |
c906108c | 13000 | /* Get bit size of field (zero if none). */ |
e142c38c | 13001 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13002 | if (attr) |
13003 | { | |
13004 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13005 | } | |
13006 | else | |
13007 | { | |
13008 | FIELD_BITSIZE (*fp) = 0; | |
13009 | } | |
13010 | ||
13011 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13012 | if (handle_data_member_location (die, cu, &offset)) |
13013 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13014 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13015 | if (attr) |
13016 | { | |
5e2b427d | 13017 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13018 | { |
13019 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13020 | additional bit offset from the MSB of the containing |
13021 | anonymous object to the MSB of the field. We don't | |
13022 | have to do anything special since we don't need to | |
13023 | know the size of the anonymous object. */ | |
f41f5e61 | 13024 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13025 | } |
13026 | else | |
13027 | { | |
13028 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13029 | MSB of the anonymous object, subtract off the number of |
13030 | bits from the MSB of the field to the MSB of the | |
13031 | object, and then subtract off the number of bits of | |
13032 | the field itself. The result is the bit offset of | |
13033 | the LSB of the field. */ | |
c906108c SS |
13034 | int anonymous_size; |
13035 | int bit_offset = DW_UNSND (attr); | |
13036 | ||
e142c38c | 13037 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13038 | if (attr) |
13039 | { | |
13040 | /* The size of the anonymous object containing | |
13041 | the bit field is explicit, so use the | |
13042 | indicated size (in bytes). */ | |
13043 | anonymous_size = DW_UNSND (attr); | |
13044 | } | |
13045 | else | |
13046 | { | |
13047 | /* The size of the anonymous object containing | |
13048 | the bit field must be inferred from the type | |
13049 | attribute of the data member containing the | |
13050 | bit field. */ | |
13051 | anonymous_size = TYPE_LENGTH (fp->type); | |
13052 | } | |
f41f5e61 PA |
13053 | SET_FIELD_BITPOS (*fp, |
13054 | (FIELD_BITPOS (*fp) | |
13055 | + anonymous_size * bits_per_byte | |
13056 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13057 | } |
13058 | } | |
da5b30da AA |
13059 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13060 | if (attr != NULL) | |
13061 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13062 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13063 | |
13064 | /* Get name of field. */ | |
39cbfefa DJ |
13065 | fieldname = dwarf2_name (die, cu); |
13066 | if (fieldname == NULL) | |
13067 | fieldname = ""; | |
d8151005 DJ |
13068 | |
13069 | /* The name is already allocated along with this objfile, so we don't | |
13070 | need to duplicate it for the type. */ | |
13071 | fp->name = fieldname; | |
c906108c SS |
13072 | |
13073 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13074 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13075 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13076 | { |
d48cc9dd | 13077 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13078 | new_field->accessibility = DW_ACCESS_private; |
13079 | fip->non_public_fields = 1; | |
13080 | } | |
13081 | } | |
a9a9bd0f | 13082 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13083 | { |
a9a9bd0f DC |
13084 | /* C++ static member. */ |
13085 | ||
13086 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13087 | is a declaration, but all versions of G++ as of this writing | |
13088 | (so through at least 3.2.1) incorrectly generate | |
13089 | DW_TAG_variable tags. */ | |
6e70227d | 13090 | |
ff355380 | 13091 | const char *physname; |
c906108c | 13092 | |
a9a9bd0f | 13093 | /* Get name of field. */ |
39cbfefa DJ |
13094 | fieldname = dwarf2_name (die, cu); |
13095 | if (fieldname == NULL) | |
c906108c SS |
13096 | return; |
13097 | ||
254e6b9e | 13098 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13099 | if (attr |
13100 | /* Only create a symbol if this is an external value. | |
13101 | new_symbol checks this and puts the value in the global symbol | |
13102 | table, which we want. If it is not external, new_symbol | |
13103 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13104 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13105 | { |
13106 | /* A static const member, not much different than an enum as far as | |
13107 | we're concerned, except that we can support more types. */ | |
13108 | new_symbol (die, NULL, cu); | |
13109 | } | |
13110 | ||
2df3850c | 13111 | /* Get physical name. */ |
ff355380 | 13112 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13113 | |
d8151005 DJ |
13114 | /* The name is already allocated along with this objfile, so we don't |
13115 | need to duplicate it for the type. */ | |
13116 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13117 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13118 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13119 | } |
13120 | else if (die->tag == DW_TAG_inheritance) | |
13121 | { | |
74ac6d43 | 13122 | LONGEST offset; |
d4b96c9a | 13123 | |
74ac6d43 TT |
13124 | /* C++ base class field. */ |
13125 | if (handle_data_member_location (die, cu, &offset)) | |
13126 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13127 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13128 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13129 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13130 | fip->nbaseclasses++; | |
13131 | } | |
13132 | } | |
13133 | ||
98751a41 JK |
13134 | /* Add a typedef defined in the scope of the FIP's class. */ |
13135 | ||
13136 | static void | |
13137 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13138 | struct dwarf2_cu *cu) | |
6e70227d | 13139 | { |
98751a41 | 13140 | struct typedef_field_list *new_field; |
98751a41 | 13141 | struct typedef_field *fp; |
98751a41 JK |
13142 | |
13143 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13144 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13145 | make_cleanup (xfree, new_field); |
13146 | ||
13147 | gdb_assert (die->tag == DW_TAG_typedef); | |
13148 | ||
13149 | fp = &new_field->field; | |
13150 | ||
13151 | /* Get name of field. */ | |
13152 | fp->name = dwarf2_name (die, cu); | |
13153 | if (fp->name == NULL) | |
13154 | return; | |
13155 | ||
13156 | fp->type = read_type_die (die, cu); | |
13157 | ||
13158 | new_field->next = fip->typedef_field_list; | |
13159 | fip->typedef_field_list = new_field; | |
13160 | fip->typedef_field_list_count++; | |
13161 | } | |
13162 | ||
c906108c SS |
13163 | /* Create the vector of fields, and attach it to the type. */ |
13164 | ||
13165 | static void | |
fba45db2 | 13166 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13167 | struct dwarf2_cu *cu) |
c906108c SS |
13168 | { |
13169 | int nfields = fip->nfields; | |
13170 | ||
13171 | /* Record the field count, allocate space for the array of fields, | |
13172 | and create blank accessibility bitfields if necessary. */ | |
13173 | TYPE_NFIELDS (type) = nfields; | |
13174 | TYPE_FIELDS (type) = (struct field *) | |
13175 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
13176 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
13177 | ||
b4ba55a1 | 13178 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
13179 | { |
13180 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13181 | ||
13182 | TYPE_FIELD_PRIVATE_BITS (type) = | |
13183 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13184 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
13185 | ||
13186 | TYPE_FIELD_PROTECTED_BITS (type) = | |
13187 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13188 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
13189 | ||
774b6a14 TT |
13190 | TYPE_FIELD_IGNORE_BITS (type) = |
13191 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13192 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
13193 | } |
13194 | ||
13195 | /* If the type has baseclasses, allocate and clear a bit vector for | |
13196 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 13197 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
13198 | { |
13199 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 13200 | unsigned char *pointer; |
c906108c SS |
13201 | |
13202 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 13203 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 13204 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
13205 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
13206 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
13207 | } | |
13208 | ||
3e43a32a MS |
13209 | /* Copy the saved-up fields into the field vector. Start from the head of |
13210 | the list, adding to the tail of the field array, so that they end up in | |
13211 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
13212 | while (nfields-- > 0) |
13213 | { | |
7d0ccb61 DJ |
13214 | struct nextfield *fieldp; |
13215 | ||
13216 | if (fip->fields) | |
13217 | { | |
13218 | fieldp = fip->fields; | |
13219 | fip->fields = fieldp->next; | |
13220 | } | |
13221 | else | |
13222 | { | |
13223 | fieldp = fip->baseclasses; | |
13224 | fip->baseclasses = fieldp->next; | |
13225 | } | |
13226 | ||
13227 | TYPE_FIELD (type, nfields) = fieldp->field; | |
13228 | switch (fieldp->accessibility) | |
c906108c | 13229 | { |
c5aa993b | 13230 | case DW_ACCESS_private: |
b4ba55a1 JB |
13231 | if (cu->language != language_ada) |
13232 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 13233 | break; |
c906108c | 13234 | |
c5aa993b | 13235 | case DW_ACCESS_protected: |
b4ba55a1 JB |
13236 | if (cu->language != language_ada) |
13237 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 13238 | break; |
c906108c | 13239 | |
c5aa993b JM |
13240 | case DW_ACCESS_public: |
13241 | break; | |
c906108c | 13242 | |
c5aa993b JM |
13243 | default: |
13244 | /* Unknown accessibility. Complain and treat it as public. */ | |
13245 | { | |
e2e0b3e5 | 13246 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 13247 | fieldp->accessibility); |
c5aa993b JM |
13248 | } |
13249 | break; | |
c906108c SS |
13250 | } |
13251 | if (nfields < fip->nbaseclasses) | |
13252 | { | |
7d0ccb61 | 13253 | switch (fieldp->virtuality) |
c906108c | 13254 | { |
c5aa993b JM |
13255 | case DW_VIRTUALITY_virtual: |
13256 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 13257 | if (cu->language == language_ada) |
a73c6dcd | 13258 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
13259 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
13260 | break; | |
c906108c SS |
13261 | } |
13262 | } | |
c906108c SS |
13263 | } |
13264 | } | |
13265 | ||
7d27a96d TT |
13266 | /* Return true if this member function is a constructor, false |
13267 | otherwise. */ | |
13268 | ||
13269 | static int | |
13270 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
13271 | { | |
13272 | const char *fieldname; | |
fe978cb0 | 13273 | const char *type_name; |
7d27a96d TT |
13274 | int len; |
13275 | ||
13276 | if (die->parent == NULL) | |
13277 | return 0; | |
13278 | ||
13279 | if (die->parent->tag != DW_TAG_structure_type | |
13280 | && die->parent->tag != DW_TAG_union_type | |
13281 | && die->parent->tag != DW_TAG_class_type) | |
13282 | return 0; | |
13283 | ||
13284 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
13285 | type_name = dwarf2_name (die->parent, cu); |
13286 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
13287 | return 0; |
13288 | ||
13289 | len = strlen (fieldname); | |
fe978cb0 PA |
13290 | return (strncmp (fieldname, type_name, len) == 0 |
13291 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
13292 | } |
13293 | ||
c906108c SS |
13294 | /* Add a member function to the proper fieldlist. */ |
13295 | ||
13296 | static void | |
107d2387 | 13297 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13298 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 13299 | { |
e7c27a73 | 13300 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13301 | struct attribute *attr; |
13302 | struct fnfieldlist *flp; | |
13303 | int i; | |
13304 | struct fn_field *fnp; | |
15d034d0 | 13305 | const char *fieldname; |
c906108c | 13306 | struct nextfnfield *new_fnfield; |
f792889a | 13307 | struct type *this_type; |
60d5a603 | 13308 | enum dwarf_access_attribute accessibility; |
c906108c | 13309 | |
b4ba55a1 | 13310 | if (cu->language == language_ada) |
a73c6dcd | 13311 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 13312 | |
2df3850c | 13313 | /* Get name of member function. */ |
39cbfefa DJ |
13314 | fieldname = dwarf2_name (die, cu); |
13315 | if (fieldname == NULL) | |
2df3850c | 13316 | return; |
c906108c | 13317 | |
c906108c SS |
13318 | /* Look up member function name in fieldlist. */ |
13319 | for (i = 0; i < fip->nfnfields; i++) | |
13320 | { | |
27bfe10e | 13321 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
13322 | break; |
13323 | } | |
13324 | ||
13325 | /* Create new list element if necessary. */ | |
13326 | if (i < fip->nfnfields) | |
13327 | flp = &fip->fnfieldlists[i]; | |
13328 | else | |
13329 | { | |
13330 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13331 | { | |
13332 | fip->fnfieldlists = (struct fnfieldlist *) | |
13333 | xrealloc (fip->fnfieldlists, | |
13334 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13335 | * sizeof (struct fnfieldlist)); |
c906108c | 13336 | if (fip->nfnfields == 0) |
c13c43fd | 13337 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
13338 | } |
13339 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
13340 | flp->name = fieldname; | |
13341 | flp->length = 0; | |
13342 | flp->head = NULL; | |
3da10d80 | 13343 | i = fip->nfnfields++; |
c906108c SS |
13344 | } |
13345 | ||
13346 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 13347 | entry. */ |
8d749320 | 13348 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 13349 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
13350 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
13351 | new_fnfield->next = flp->head; | |
13352 | flp->head = new_fnfield; | |
13353 | flp->length++; | |
13354 | ||
13355 | /* Fill in the member function field info. */ | |
13356 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
13357 | |
13358 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 13359 | if (cu->language == language_cplus) |
3da10d80 KS |
13360 | { |
13361 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
13362 | die, cu); | |
13363 | } | |
13364 | else | |
13365 | { | |
1d06ead6 | 13366 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
13367 | fnp->physname = physname ? physname : ""; |
13368 | } | |
13369 | ||
c906108c | 13370 | fnp->type = alloc_type (objfile); |
f792889a DJ |
13371 | this_type = read_type_die (die, cu); |
13372 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 13373 | { |
f792889a | 13374 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 13375 | |
f792889a | 13376 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
13377 | of the method itself (TYPE_CODE_METHOD). */ |
13378 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
13379 | TYPE_TARGET_TYPE (this_type), |
13380 | TYPE_FIELDS (this_type), | |
13381 | TYPE_NFIELDS (this_type), | |
13382 | TYPE_VARARGS (this_type)); | |
c906108c SS |
13383 | |
13384 | /* Handle static member functions. | |
c5aa993b | 13385 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
13386 | member functions. G++ helps GDB by marking the first |
13387 | parameter for non-static member functions (which is the this | |
13388 | pointer) as artificial. We obtain this information from | |
13389 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 13390 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
13391 | fnp->voffset = VOFFSET_STATIC; |
13392 | } | |
13393 | else | |
e2e0b3e5 | 13394 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 13395 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
13396 | |
13397 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 13398 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 13399 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 13400 | |
3e43a32a MS |
13401 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
13402 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
13403 | |
13404 | /* Get accessibility. */ | |
e142c38c | 13405 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 13406 | if (attr) |
aead7601 | 13407 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
13408 | else |
13409 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13410 | switch (accessibility) | |
c906108c | 13411 | { |
60d5a603 JK |
13412 | case DW_ACCESS_private: |
13413 | fnp->is_private = 1; | |
13414 | break; | |
13415 | case DW_ACCESS_protected: | |
13416 | fnp->is_protected = 1; | |
13417 | break; | |
c906108c SS |
13418 | } |
13419 | ||
b02dede2 | 13420 | /* Check for artificial methods. */ |
e142c38c | 13421 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
13422 | if (attr && DW_UNSND (attr) != 0) |
13423 | fnp->is_artificial = 1; | |
13424 | ||
7d27a96d TT |
13425 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
13426 | ||
0d564a31 | 13427 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
13428 | function. For older versions of GCC, this is an offset in the |
13429 | appropriate virtual table, as specified by DW_AT_containing_type. | |
13430 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
13431 | to the object address. */ |
13432 | ||
e142c38c | 13433 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 13434 | if (attr) |
8e19ed76 | 13435 | { |
aec5aa8b | 13436 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 13437 | { |
aec5aa8b TT |
13438 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
13439 | { | |
13440 | /* Old-style GCC. */ | |
13441 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
13442 | } | |
13443 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
13444 | || (DW_BLOCK (attr)->size > 1 | |
13445 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
13446 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
13447 | { | |
aec5aa8b TT |
13448 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
13449 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
13450 | dwarf2_complex_location_expr_complaint (); | |
13451 | else | |
13452 | fnp->voffset /= cu->header.addr_size; | |
13453 | fnp->voffset += 2; | |
13454 | } | |
13455 | else | |
13456 | dwarf2_complex_location_expr_complaint (); | |
13457 | ||
13458 | if (!fnp->fcontext) | |
7e993ebf KS |
13459 | { |
13460 | /* If there is no `this' field and no DW_AT_containing_type, | |
13461 | we cannot actually find a base class context for the | |
13462 | vtable! */ | |
13463 | if (TYPE_NFIELDS (this_type) == 0 | |
13464 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
13465 | { | |
13466 | complaint (&symfile_complaints, | |
13467 | _("cannot determine context for virtual member " | |
13468 | "function \"%s\" (offset %d)"), | |
9c541725 | 13469 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
13470 | } |
13471 | else | |
13472 | { | |
13473 | fnp->fcontext | |
13474 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
13475 | } | |
13476 | } | |
aec5aa8b | 13477 | } |
3690dd37 | 13478 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 13479 | { |
4d3c2250 | 13480 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13481 | } |
13482 | else | |
13483 | { | |
4d3c2250 KB |
13484 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
13485 | fieldname); | |
8e19ed76 | 13486 | } |
0d564a31 | 13487 | } |
d48cc9dd DJ |
13488 | else |
13489 | { | |
13490 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13491 | if (attr && DW_UNSND (attr)) | |
13492 | { | |
13493 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13494 | complaint (&symfile_complaints, | |
3e43a32a MS |
13495 | _("Member function \"%s\" (offset %d) is virtual " |
13496 | "but the vtable offset is not specified"), | |
9c541725 | 13497 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 13498 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13499 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13500 | } | |
13501 | } | |
c906108c SS |
13502 | } |
13503 | ||
13504 | /* Create the vector of member function fields, and attach it to the type. */ | |
13505 | ||
13506 | static void | |
fba45db2 | 13507 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13508 | struct dwarf2_cu *cu) |
c906108c SS |
13509 | { |
13510 | struct fnfieldlist *flp; | |
c906108c SS |
13511 | int i; |
13512 | ||
b4ba55a1 | 13513 | if (cu->language == language_ada) |
a73c6dcd | 13514 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13515 | |
c906108c SS |
13516 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13517 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13518 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13519 | ||
13520 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13521 | { | |
13522 | struct nextfnfield *nfp = flp->head; | |
13523 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13524 | int k; | |
13525 | ||
13526 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13527 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13528 | fn_flp->fn_fields = (struct fn_field *) | |
13529 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13530 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13531 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13532 | } |
13533 | ||
13534 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13535 | } |
13536 | ||
1168df01 JB |
13537 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13538 | language, zero otherwise. */ | |
13539 | static int | |
13540 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13541 | { | |
13542 | static const char vptr[] = "_vptr"; | |
987504bb | 13543 | static const char vtable[] = "vtable"; |
1168df01 | 13544 | |
9c37b5ae TT |
13545 | /* Look for the C++ form of the vtable. */ |
13546 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
13547 | return 1; |
13548 | ||
13549 | return 0; | |
13550 | } | |
13551 | ||
c0dd20ea | 13552 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13553 | functions, with the ABI-specified layout. If TYPE describes |
13554 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13555 | |
13556 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13557 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13558 | |
0b92b5bb TT |
13559 | static void |
13560 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13561 | { |
09e2d7c7 | 13562 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13563 | |
13564 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13565 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13566 | return; | |
c0dd20ea DJ |
13567 | |
13568 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13569 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13570 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13571 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13572 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13573 | return; | |
c0dd20ea DJ |
13574 | |
13575 | /* Find the type of the method. */ | |
0b92b5bb | 13576 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13577 | if (pfn_type == NULL |
13578 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13579 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13580 | return; |
c0dd20ea DJ |
13581 | |
13582 | /* Look for the "this" argument. */ | |
13583 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13584 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13585 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13586 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13587 | return; |
c0dd20ea | 13588 | |
09e2d7c7 | 13589 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13590 | new_type = alloc_type (objfile); |
09e2d7c7 | 13591 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13592 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13593 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13594 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13595 | } |
1168df01 | 13596 | |
685b1105 JK |
13597 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
13598 | (icc). */ | |
13599 | ||
13600 | static int | |
13601 | producer_is_icc (struct dwarf2_cu *cu) | |
13602 | { | |
13603 | if (!cu->checked_producer) | |
13604 | check_producer (cu); | |
13605 | ||
13606 | return cu->producer_is_icc; | |
13607 | } | |
13608 | ||
c906108c | 13609 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13610 | (definition) to create a type for the structure or union. Fill in |
13611 | the type's name and general properties; the members will not be | |
83655187 DE |
13612 | processed until process_structure_scope. A symbol table entry for |
13613 | the type will also not be done until process_structure_scope (assuming | |
13614 | the type has a name). | |
c906108c | 13615 | |
c767944b DJ |
13616 | NOTE: we need to call these functions regardless of whether or not the |
13617 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13618 | structure or union. This gets the type entered into our set of |
83655187 | 13619 | user defined types. */ |
c906108c | 13620 | |
f792889a | 13621 | static struct type * |
134d01f1 | 13622 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13623 | { |
e7c27a73 | 13624 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13625 | struct type *type; |
13626 | struct attribute *attr; | |
15d034d0 | 13627 | const char *name; |
c906108c | 13628 | |
348e048f DE |
13629 | /* If the definition of this type lives in .debug_types, read that type. |
13630 | Don't follow DW_AT_specification though, that will take us back up | |
13631 | the chain and we want to go down. */ | |
45e58e77 | 13632 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13633 | if (attr) |
13634 | { | |
ac9ec31b | 13635 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13636 | |
ac9ec31b | 13637 | /* The type's CU may not be the same as CU. |
02142a6c | 13638 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13639 | return set_die_type (die, type, cu); |
13640 | } | |
13641 | ||
c0dd20ea | 13642 | type = alloc_type (objfile); |
c906108c | 13643 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13644 | |
39cbfefa DJ |
13645 | name = dwarf2_name (die, cu); |
13646 | if (name != NULL) | |
c906108c | 13647 | { |
987504bb | 13648 | if (cu->language == language_cplus |
c44af4eb TT |
13649 | || cu->language == language_d |
13650 | || cu->language == language_rust) | |
63d06c5c | 13651 | { |
15d034d0 | 13652 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13653 | |
13654 | /* dwarf2_full_name might have already finished building the DIE's | |
13655 | type. If so, there is no need to continue. */ | |
13656 | if (get_die_type (die, cu) != NULL) | |
13657 | return get_die_type (die, cu); | |
13658 | ||
13659 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13660 | if (die->tag == DW_TAG_structure_type |
13661 | || die->tag == DW_TAG_class_type) | |
13662 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13663 | } |
13664 | else | |
13665 | { | |
d8151005 DJ |
13666 | /* The name is already allocated along with this objfile, so |
13667 | we don't need to duplicate it for the type. */ | |
7d455152 | 13668 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13669 | if (die->tag == DW_TAG_class_type) |
13670 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13671 | } |
c906108c SS |
13672 | } |
13673 | ||
13674 | if (die->tag == DW_TAG_structure_type) | |
13675 | { | |
13676 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13677 | } | |
13678 | else if (die->tag == DW_TAG_union_type) | |
13679 | { | |
13680 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13681 | } | |
13682 | else | |
13683 | { | |
4753d33b | 13684 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13685 | } |
13686 | ||
0cc2414c TT |
13687 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13688 | TYPE_DECLARED_CLASS (type) = 1; | |
13689 | ||
e142c38c | 13690 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13691 | if (attr) |
13692 | { | |
155bfbd3 JB |
13693 | if (attr_form_is_constant (attr)) |
13694 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13695 | else | |
13696 | { | |
13697 | /* For the moment, dynamic type sizes are not supported | |
13698 | by GDB's struct type. The actual size is determined | |
13699 | on-demand when resolving the type of a given object, | |
13700 | so set the type's length to zero for now. Otherwise, | |
13701 | we record an expression as the length, and that expression | |
13702 | could lead to a very large value, which could eventually | |
13703 | lead to us trying to allocate that much memory when creating | |
13704 | a value of that type. */ | |
13705 | TYPE_LENGTH (type) = 0; | |
13706 | } | |
c906108c SS |
13707 | } |
13708 | else | |
13709 | { | |
13710 | TYPE_LENGTH (type) = 0; | |
13711 | } | |
13712 | ||
422b1cb0 | 13713 | if (producer_is_icc (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 JK |
13714 | { |
13715 | /* ICC does not output the required DW_AT_declaration | |
13716 | on incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13717 | TYPE_STUB (type) = 1; |
685b1105 JK |
13718 | } |
13719 | else | |
13720 | TYPE_STUB_SUPPORTED (type) = 1; | |
13721 | ||
dc718098 | 13722 | if (die_is_declaration (die, cu)) |
876cecd0 | 13723 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13724 | else if (attr == NULL && die->child == NULL |
13725 | && producer_is_realview (cu->producer)) | |
13726 | /* RealView does not output the required DW_AT_declaration | |
13727 | on incomplete types. */ | |
13728 | TYPE_STUB (type) = 1; | |
dc718098 | 13729 | |
c906108c SS |
13730 | /* We need to add the type field to the die immediately so we don't |
13731 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13732 | type within the structure itself. */ |
1c379e20 | 13733 | set_die_type (die, type, cu); |
c906108c | 13734 | |
7e314c57 JK |
13735 | /* set_die_type should be already done. */ |
13736 | set_descriptive_type (type, die, cu); | |
13737 | ||
c767944b DJ |
13738 | return type; |
13739 | } | |
13740 | ||
13741 | /* Finish creating a structure or union type, including filling in | |
13742 | its members and creating a symbol for it. */ | |
13743 | ||
13744 | static void | |
13745 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13746 | { | |
13747 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13748 | struct die_info *child_die; |
c767944b DJ |
13749 | struct type *type; |
13750 | ||
13751 | type = get_die_type (die, cu); | |
13752 | if (type == NULL) | |
13753 | type = read_structure_type (die, cu); | |
13754 | ||
e142c38c | 13755 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13756 | { |
13757 | struct field_info fi; | |
34eaf542 | 13758 | VEC (symbolp) *template_args = NULL; |
c767944b | 13759 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13760 | |
13761 | memset (&fi, 0, sizeof (struct field_info)); | |
13762 | ||
639d11d3 | 13763 | child_die = die->child; |
c906108c SS |
13764 | |
13765 | while (child_die && child_die->tag) | |
13766 | { | |
a9a9bd0f DC |
13767 | if (child_die->tag == DW_TAG_member |
13768 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13769 | { |
a9a9bd0f DC |
13770 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13771 | should be a DW_TAG_member that is a declaration, but | |
13772 | all versions of G++ as of this writing (so through at | |
13773 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13774 | tags for them instead. */ | |
e7c27a73 | 13775 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13776 | } |
8713b1b1 | 13777 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13778 | { |
e98c9e7c TT |
13779 | /* Rust doesn't have member functions in the C++ sense. |
13780 | However, it does emit ordinary functions as children | |
13781 | of a struct DIE. */ | |
13782 | if (cu->language == language_rust) | |
13783 | read_func_scope (child_die, cu); | |
13784 | else | |
13785 | { | |
13786 | /* C++ member function. */ | |
13787 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
13788 | } | |
c906108c SS |
13789 | } |
13790 | else if (child_die->tag == DW_TAG_inheritance) | |
13791 | { | |
13792 | /* C++ base class field. */ | |
e7c27a73 | 13793 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13794 | } |
98751a41 JK |
13795 | else if (child_die->tag == DW_TAG_typedef) |
13796 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13797 | else if (child_die->tag == DW_TAG_template_type_param |
13798 | || child_die->tag == DW_TAG_template_value_param) | |
13799 | { | |
13800 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13801 | ||
f1078f66 DJ |
13802 | if (arg != NULL) |
13803 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13804 | } |
13805 | ||
c906108c SS |
13806 | child_die = sibling_die (child_die); |
13807 | } | |
13808 | ||
34eaf542 TT |
13809 | /* Attach template arguments to type. */ |
13810 | if (! VEC_empty (symbolp, template_args)) | |
13811 | { | |
13812 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13813 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13814 | = VEC_length (symbolp, template_args); | |
13815 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13816 | = XOBNEWVEC (&objfile->objfile_obstack, |
13817 | struct symbol *, | |
13818 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13819 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13820 | VEC_address (symbolp, template_args), | |
13821 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13822 | * sizeof (struct symbol *))); | |
13823 | VEC_free (symbolp, template_args); | |
13824 | } | |
13825 | ||
c906108c SS |
13826 | /* Attach fields and member functions to the type. */ |
13827 | if (fi.nfields) | |
e7c27a73 | 13828 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13829 | if (fi.nfnfields) |
13830 | { | |
e7c27a73 | 13831 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13832 | |
c5aa993b | 13833 | /* Get the type which refers to the base class (possibly this |
c906108c | 13834 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13835 | class from the DW_AT_containing_type attribute. This use of |
13836 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13837 | |
e142c38c | 13838 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13839 | { |
e7c27a73 | 13840 | struct type *t = die_containing_type (die, cu); |
c906108c | 13841 | |
ae6ae975 | 13842 | set_type_vptr_basetype (type, t); |
c906108c SS |
13843 | if (type == t) |
13844 | { | |
c906108c SS |
13845 | int i; |
13846 | ||
13847 | /* Our own class provides vtbl ptr. */ | |
13848 | for (i = TYPE_NFIELDS (t) - 1; | |
13849 | i >= TYPE_N_BASECLASSES (t); | |
13850 | --i) | |
13851 | { | |
0d5cff50 | 13852 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13853 | |
1168df01 | 13854 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13855 | { |
ae6ae975 | 13856 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13857 | break; |
13858 | } | |
13859 | } | |
13860 | ||
13861 | /* Complain if virtual function table field not found. */ | |
13862 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13863 | complaint (&symfile_complaints, |
3e43a32a MS |
13864 | _("virtual function table pointer " |
13865 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13866 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13867 | ""); | |
c906108c SS |
13868 | } |
13869 | else | |
13870 | { | |
ae6ae975 | 13871 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13872 | } |
13873 | } | |
f6235d4c | 13874 | else if (cu->producer |
61012eef | 13875 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13876 | { |
13877 | /* The IBM XLC compiler does not provide direct indication | |
13878 | of the containing type, but the vtable pointer is | |
13879 | always named __vfp. */ | |
13880 | ||
13881 | int i; | |
13882 | ||
13883 | for (i = TYPE_NFIELDS (type) - 1; | |
13884 | i >= TYPE_N_BASECLASSES (type); | |
13885 | --i) | |
13886 | { | |
13887 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13888 | { | |
ae6ae975 DE |
13889 | set_type_vptr_fieldno (type, i); |
13890 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13891 | break; |
13892 | } | |
13893 | } | |
13894 | } | |
c906108c | 13895 | } |
98751a41 JK |
13896 | |
13897 | /* Copy fi.typedef_field_list linked list elements content into the | |
13898 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13899 | if (fi.typedef_field_list) | |
13900 | { | |
13901 | int i = fi.typedef_field_list_count; | |
13902 | ||
a0d7a4ff | 13903 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13904 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13905 | = ((struct typedef_field *) |
13906 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13907 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13908 | ||
13909 | /* Reverse the list order to keep the debug info elements order. */ | |
13910 | while (--i >= 0) | |
13911 | { | |
13912 | struct typedef_field *dest, *src; | |
6e70227d | 13913 | |
98751a41 JK |
13914 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13915 | src = &fi.typedef_field_list->field; | |
13916 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13917 | *dest = *src; | |
13918 | } | |
13919 | } | |
c767944b DJ |
13920 | |
13921 | do_cleanups (back_to); | |
c906108c | 13922 | } |
63d06c5c | 13923 | |
bb5ed363 | 13924 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13925 | |
90aeadfc DC |
13926 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13927 | snapshots) has been known to create a die giving a declaration | |
13928 | for a class that has, as a child, a die giving a definition for a | |
13929 | nested class. So we have to process our children even if the | |
13930 | current die is a declaration. Normally, of course, a declaration | |
13931 | won't have any children at all. */ | |
134d01f1 | 13932 | |
ca040673 DE |
13933 | child_die = die->child; |
13934 | ||
90aeadfc DC |
13935 | while (child_die != NULL && child_die->tag) |
13936 | { | |
13937 | if (child_die->tag == DW_TAG_member | |
13938 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13939 | || child_die->tag == DW_TAG_inheritance |
13940 | || child_die->tag == DW_TAG_template_value_param | |
13941 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13942 | { |
90aeadfc | 13943 | /* Do nothing. */ |
134d01f1 | 13944 | } |
90aeadfc DC |
13945 | else |
13946 | process_die (child_die, cu); | |
134d01f1 | 13947 | |
90aeadfc | 13948 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13949 | } |
13950 | ||
fa4028e9 JB |
13951 | /* Do not consider external references. According to the DWARF standard, |
13952 | these DIEs are identified by the fact that they have no byte_size | |
13953 | attribute, and a declaration attribute. */ | |
13954 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13955 | || !die_is_declaration (die, cu)) | |
c767944b | 13956 | new_symbol (die, type, cu); |
134d01f1 DJ |
13957 | } |
13958 | ||
55426c9d JB |
13959 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13960 | update TYPE using some information only available in DIE's children. */ | |
13961 | ||
13962 | static void | |
13963 | update_enumeration_type_from_children (struct die_info *die, | |
13964 | struct type *type, | |
13965 | struct dwarf2_cu *cu) | |
13966 | { | |
60f7655a | 13967 | struct die_info *child_die; |
55426c9d JB |
13968 | int unsigned_enum = 1; |
13969 | int flag_enum = 1; | |
13970 | ULONGEST mask = 0; | |
55426c9d | 13971 | |
8268c778 | 13972 | auto_obstack obstack; |
55426c9d | 13973 | |
60f7655a DE |
13974 | for (child_die = die->child; |
13975 | child_die != NULL && child_die->tag; | |
13976 | child_die = sibling_die (child_die)) | |
55426c9d JB |
13977 | { |
13978 | struct attribute *attr; | |
13979 | LONGEST value; | |
13980 | const gdb_byte *bytes; | |
13981 | struct dwarf2_locexpr_baton *baton; | |
13982 | const char *name; | |
60f7655a | 13983 | |
55426c9d JB |
13984 | if (child_die->tag != DW_TAG_enumerator) |
13985 | continue; | |
13986 | ||
13987 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13988 | if (attr == NULL) | |
13989 | continue; | |
13990 | ||
13991 | name = dwarf2_name (child_die, cu); | |
13992 | if (name == NULL) | |
13993 | name = "<anonymous enumerator>"; | |
13994 | ||
13995 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13996 | &value, &bytes, &baton); | |
13997 | if (value < 0) | |
13998 | { | |
13999 | unsigned_enum = 0; | |
14000 | flag_enum = 0; | |
14001 | } | |
14002 | else if ((mask & value) != 0) | |
14003 | flag_enum = 0; | |
14004 | else | |
14005 | mask |= value; | |
14006 | ||
14007 | /* If we already know that the enum type is neither unsigned, nor | |
14008 | a flag type, no need to look at the rest of the enumerates. */ | |
14009 | if (!unsigned_enum && !flag_enum) | |
14010 | break; | |
55426c9d JB |
14011 | } |
14012 | ||
14013 | if (unsigned_enum) | |
14014 | TYPE_UNSIGNED (type) = 1; | |
14015 | if (flag_enum) | |
14016 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14017 | } |
14018 | ||
134d01f1 DJ |
14019 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14020 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14021 | |
f792889a | 14022 | static struct type * |
134d01f1 | 14023 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14024 | { |
e7c27a73 | 14025 | struct objfile *objfile = cu->objfile; |
c906108c | 14026 | struct type *type; |
c906108c | 14027 | struct attribute *attr; |
0114d602 | 14028 | const char *name; |
134d01f1 | 14029 | |
348e048f DE |
14030 | /* If the definition of this type lives in .debug_types, read that type. |
14031 | Don't follow DW_AT_specification though, that will take us back up | |
14032 | the chain and we want to go down. */ | |
45e58e77 | 14033 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14034 | if (attr) |
14035 | { | |
ac9ec31b | 14036 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14037 | |
ac9ec31b | 14038 | /* The type's CU may not be the same as CU. |
02142a6c | 14039 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14040 | return set_die_type (die, type, cu); |
14041 | } | |
14042 | ||
c906108c SS |
14043 | type = alloc_type (objfile); |
14044 | ||
14045 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14046 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14047 | if (name != NULL) |
7d455152 | 14048 | TYPE_TAG_NAME (type) = name; |
c906108c | 14049 | |
0626fc76 TT |
14050 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14051 | if (attr != NULL) | |
14052 | { | |
14053 | struct type *underlying_type = die_type (die, cu); | |
14054 | ||
14055 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14056 | } | |
14057 | ||
e142c38c | 14058 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14059 | if (attr) |
14060 | { | |
14061 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14062 | } | |
14063 | else | |
14064 | { | |
14065 | TYPE_LENGTH (type) = 0; | |
14066 | } | |
14067 | ||
137033e9 JB |
14068 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14069 | declared as private in the package spec, and then defined only | |
14070 | inside the package body. Such types are known as Taft Amendment | |
14071 | Types. When another package uses such a type, an incomplete DIE | |
14072 | may be generated by the compiler. */ | |
02eb380e | 14073 | if (die_is_declaration (die, cu)) |
876cecd0 | 14074 | TYPE_STUB (type) = 1; |
02eb380e | 14075 | |
0626fc76 TT |
14076 | /* Finish the creation of this type by using the enum's children. |
14077 | We must call this even when the underlying type has been provided | |
14078 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14079 | update_enumeration_type_from_children (die, type, cu); |
14080 | ||
0626fc76 TT |
14081 | /* If this type has an underlying type that is not a stub, then we |
14082 | may use its attributes. We always use the "unsigned" attribute | |
14083 | in this situation, because ordinarily we guess whether the type | |
14084 | is unsigned -- but the guess can be wrong and the underlying type | |
14085 | can tell us the reality. However, we defer to a local size | |
14086 | attribute if one exists, because this lets the compiler override | |
14087 | the underlying type if needed. */ | |
14088 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14089 | { | |
14090 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14091 | if (TYPE_LENGTH (type) == 0) | |
14092 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14093 | } | |
14094 | ||
3d567982 TT |
14095 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14096 | ||
f792889a | 14097 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14098 | } |
14099 | ||
14100 | /* Given a pointer to a die which begins an enumeration, process all | |
14101 | the dies that define the members of the enumeration, and create the | |
14102 | symbol for the enumeration type. | |
14103 | ||
14104 | NOTE: We reverse the order of the element list. */ | |
14105 | ||
14106 | static void | |
14107 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14108 | { | |
f792889a | 14109 | struct type *this_type; |
134d01f1 | 14110 | |
f792889a DJ |
14111 | this_type = get_die_type (die, cu); |
14112 | if (this_type == NULL) | |
14113 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14114 | |
639d11d3 | 14115 | if (die->child != NULL) |
c906108c | 14116 | { |
9dc481d3 DE |
14117 | struct die_info *child_die; |
14118 | struct symbol *sym; | |
14119 | struct field *fields = NULL; | |
14120 | int num_fields = 0; | |
15d034d0 | 14121 | const char *name; |
9dc481d3 | 14122 | |
639d11d3 | 14123 | child_die = die->child; |
c906108c SS |
14124 | while (child_die && child_die->tag) |
14125 | { | |
14126 | if (child_die->tag != DW_TAG_enumerator) | |
14127 | { | |
e7c27a73 | 14128 | process_die (child_die, cu); |
c906108c SS |
14129 | } |
14130 | else | |
14131 | { | |
39cbfefa DJ |
14132 | name = dwarf2_name (child_die, cu); |
14133 | if (name) | |
c906108c | 14134 | { |
f792889a | 14135 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14136 | |
14137 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14138 | { | |
14139 | fields = (struct field *) | |
14140 | xrealloc (fields, | |
14141 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14142 | * sizeof (struct field)); |
c906108c SS |
14143 | } |
14144 | ||
3567439c | 14145 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14146 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14147 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14148 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14149 | ||
14150 | num_fields++; | |
14151 | } | |
14152 | } | |
14153 | ||
14154 | child_die = sibling_die (child_die); | |
14155 | } | |
14156 | ||
14157 | if (num_fields) | |
14158 | { | |
f792889a DJ |
14159 | TYPE_NFIELDS (this_type) = num_fields; |
14160 | TYPE_FIELDS (this_type) = (struct field *) | |
14161 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14162 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 14163 | sizeof (struct field) * num_fields); |
b8c9b27d | 14164 | xfree (fields); |
c906108c | 14165 | } |
c906108c | 14166 | } |
134d01f1 | 14167 | |
6c83ed52 TT |
14168 | /* If we are reading an enum from a .debug_types unit, and the enum |
14169 | is a declaration, and the enum is not the signatured type in the | |
14170 | unit, then we do not want to add a symbol for it. Adding a | |
14171 | symbol would in some cases obscure the true definition of the | |
14172 | enum, giving users an incomplete type when the definition is | |
14173 | actually available. Note that we do not want to do this for all | |
14174 | enums which are just declarations, because C++0x allows forward | |
14175 | enum declarations. */ | |
3019eac3 | 14176 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
14177 | && die_is_declaration (die, cu)) |
14178 | { | |
52dc124a | 14179 | struct signatured_type *sig_type; |
6c83ed52 | 14180 | |
c0f78cd4 | 14181 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
14182 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
14183 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
14184 | return; |
14185 | } | |
14186 | ||
f792889a | 14187 | new_symbol (die, this_type, cu); |
c906108c SS |
14188 | } |
14189 | ||
14190 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
14191 | the DIE's type field. For now, this only handles one dimensional | |
14192 | arrays. */ | |
14193 | ||
f792889a | 14194 | static struct type * |
e7c27a73 | 14195 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14196 | { |
e7c27a73 | 14197 | struct objfile *objfile = cu->objfile; |
c906108c | 14198 | struct die_info *child_die; |
7e314c57 | 14199 | struct type *type; |
c906108c SS |
14200 | struct type *element_type, *range_type, *index_type; |
14201 | struct type **range_types = NULL; | |
14202 | struct attribute *attr; | |
14203 | int ndim = 0; | |
14204 | struct cleanup *back_to; | |
15d034d0 | 14205 | const char *name; |
dc53a7ad | 14206 | unsigned int bit_stride = 0; |
c906108c | 14207 | |
e7c27a73 | 14208 | element_type = die_type (die, cu); |
c906108c | 14209 | |
7e314c57 JK |
14210 | /* The die_type call above may have already set the type for this DIE. */ |
14211 | type = get_die_type (die, cu); | |
14212 | if (type) | |
14213 | return type; | |
14214 | ||
dc53a7ad JB |
14215 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
14216 | if (attr != NULL) | |
14217 | bit_stride = DW_UNSND (attr) * 8; | |
14218 | ||
14219 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
14220 | if (attr != NULL) | |
14221 | bit_stride = DW_UNSND (attr); | |
14222 | ||
c906108c SS |
14223 | /* Irix 6.2 native cc creates array types without children for |
14224 | arrays with unspecified length. */ | |
639d11d3 | 14225 | if (die->child == NULL) |
c906108c | 14226 | { |
46bf5051 | 14227 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14228 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
14229 | type = create_array_type_with_stride (NULL, element_type, range_type, |
14230 | bit_stride); | |
f792889a | 14231 | return set_die_type (die, type, cu); |
c906108c SS |
14232 | } |
14233 | ||
14234 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 14235 | child_die = die->child; |
c906108c SS |
14236 | while (child_die && child_die->tag) |
14237 | { | |
14238 | if (child_die->tag == DW_TAG_subrange_type) | |
14239 | { | |
f792889a | 14240 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 14241 | |
f792889a | 14242 | if (child_type != NULL) |
a02abb62 | 14243 | { |
0963b4bd MS |
14244 | /* The range type was succesfully read. Save it for the |
14245 | array type creation. */ | |
a02abb62 JB |
14246 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
14247 | { | |
14248 | range_types = (struct type **) | |
14249 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
14250 | * sizeof (struct type *)); | |
14251 | if (ndim == 0) | |
14252 | make_cleanup (free_current_contents, &range_types); | |
14253 | } | |
f792889a | 14254 | range_types[ndim++] = child_type; |
a02abb62 | 14255 | } |
c906108c SS |
14256 | } |
14257 | child_die = sibling_die (child_die); | |
14258 | } | |
14259 | ||
14260 | /* Dwarf2 dimensions are output from left to right, create the | |
14261 | necessary array types in backwards order. */ | |
7ca2d3a3 | 14262 | |
c906108c | 14263 | type = element_type; |
7ca2d3a3 DL |
14264 | |
14265 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
14266 | { | |
14267 | int i = 0; | |
9a619af0 | 14268 | |
7ca2d3a3 | 14269 | while (i < ndim) |
dc53a7ad JB |
14270 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
14271 | bit_stride); | |
7ca2d3a3 DL |
14272 | } |
14273 | else | |
14274 | { | |
14275 | while (ndim-- > 0) | |
dc53a7ad JB |
14276 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
14277 | bit_stride); | |
7ca2d3a3 | 14278 | } |
c906108c | 14279 | |
f5f8a009 EZ |
14280 | /* Understand Dwarf2 support for vector types (like they occur on |
14281 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
14282 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
14283 | custom vendor extension. The main difference between a regular | |
14284 | array and the vector variant is that vectors are passed by value | |
14285 | to functions. */ | |
e142c38c | 14286 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 14287 | if (attr) |
ea37ba09 | 14288 | make_vector_type (type); |
f5f8a009 | 14289 | |
dbc98a8b KW |
14290 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
14291 | implementation may choose to implement triple vectors using this | |
14292 | attribute. */ | |
14293 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
14294 | if (attr) | |
14295 | { | |
14296 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
14297 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14298 | else | |
3e43a32a MS |
14299 | complaint (&symfile_complaints, |
14300 | _("DW_AT_byte_size for array type smaller " | |
14301 | "than the total size of elements")); | |
dbc98a8b KW |
14302 | } |
14303 | ||
39cbfefa DJ |
14304 | name = dwarf2_name (die, cu); |
14305 | if (name) | |
14306 | TYPE_NAME (type) = name; | |
6e70227d | 14307 | |
0963b4bd | 14308 | /* Install the type in the die. */ |
7e314c57 JK |
14309 | set_die_type (die, type, cu); |
14310 | ||
14311 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14312 | set_descriptive_type (type, die, cu); |
14313 | ||
c906108c SS |
14314 | do_cleanups (back_to); |
14315 | ||
7e314c57 | 14316 | return type; |
c906108c SS |
14317 | } |
14318 | ||
7ca2d3a3 | 14319 | static enum dwarf_array_dim_ordering |
6e70227d | 14320 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
14321 | { |
14322 | struct attribute *attr; | |
14323 | ||
14324 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
14325 | ||
aead7601 SM |
14326 | if (attr) |
14327 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 14328 | |
0963b4bd MS |
14329 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
14330 | opposite order to the dwarf2 specification, but data is still | |
14331 | laid out as per normal fortran. | |
7ca2d3a3 | 14332 | |
0963b4bd MS |
14333 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
14334 | version checking. */ | |
7ca2d3a3 | 14335 | |
905e0470 PM |
14336 | if (cu->language == language_fortran |
14337 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
14338 | { |
14339 | return DW_ORD_row_major; | |
14340 | } | |
14341 | ||
6e70227d | 14342 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
14343 | { |
14344 | case array_column_major: | |
14345 | return DW_ORD_col_major; | |
14346 | case array_row_major: | |
14347 | default: | |
14348 | return DW_ORD_row_major; | |
14349 | }; | |
14350 | } | |
14351 | ||
72019c9c | 14352 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 14353 | the DIE's type field. */ |
72019c9c | 14354 | |
f792889a | 14355 | static struct type * |
72019c9c GM |
14356 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
14357 | { | |
7e314c57 JK |
14358 | struct type *domain_type, *set_type; |
14359 | struct attribute *attr; | |
f792889a | 14360 | |
7e314c57 JK |
14361 | domain_type = die_type (die, cu); |
14362 | ||
14363 | /* The die_type call above may have already set the type for this DIE. */ | |
14364 | set_type = get_die_type (die, cu); | |
14365 | if (set_type) | |
14366 | return set_type; | |
14367 | ||
14368 | set_type = create_set_type (NULL, domain_type); | |
14369 | ||
14370 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
14371 | if (attr) |
14372 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 14373 | |
f792889a | 14374 | return set_die_type (die, set_type, cu); |
72019c9c | 14375 | } |
7ca2d3a3 | 14376 | |
0971de02 TT |
14377 | /* A helper for read_common_block that creates a locexpr baton. |
14378 | SYM is the symbol which we are marking as computed. | |
14379 | COMMON_DIE is the DIE for the common block. | |
14380 | COMMON_LOC is the location expression attribute for the common | |
14381 | block itself. | |
14382 | MEMBER_LOC is the location expression attribute for the particular | |
14383 | member of the common block that we are processing. | |
14384 | CU is the CU from which the above come. */ | |
14385 | ||
14386 | static void | |
14387 | mark_common_block_symbol_computed (struct symbol *sym, | |
14388 | struct die_info *common_die, | |
14389 | struct attribute *common_loc, | |
14390 | struct attribute *member_loc, | |
14391 | struct dwarf2_cu *cu) | |
14392 | { | |
14393 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14394 | struct dwarf2_locexpr_baton *baton; | |
14395 | gdb_byte *ptr; | |
14396 | unsigned int cu_off; | |
14397 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
14398 | LONGEST offset = 0; | |
14399 | ||
14400 | gdb_assert (common_loc && member_loc); | |
14401 | gdb_assert (attr_form_is_block (common_loc)); | |
14402 | gdb_assert (attr_form_is_block (member_loc) | |
14403 | || attr_form_is_constant (member_loc)); | |
14404 | ||
8d749320 | 14405 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
14406 | baton->per_cu = cu->per_cu; |
14407 | gdb_assert (baton->per_cu); | |
14408 | ||
14409 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
14410 | ||
14411 | if (attr_form_is_constant (member_loc)) | |
14412 | { | |
14413 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
14414 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
14415 | } | |
14416 | else | |
14417 | baton->size += DW_BLOCK (member_loc)->size; | |
14418 | ||
224c3ddb | 14419 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
14420 | baton->data = ptr; |
14421 | ||
14422 | *ptr++ = DW_OP_call4; | |
9c541725 | 14423 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
14424 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
14425 | ptr += 4; | |
14426 | ||
14427 | if (attr_form_is_constant (member_loc)) | |
14428 | { | |
14429 | *ptr++ = DW_OP_addr; | |
14430 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
14431 | ptr += cu->header.addr_size; | |
14432 | } | |
14433 | else | |
14434 | { | |
14435 | /* We have to copy the data here, because DW_OP_call4 will only | |
14436 | use a DW_AT_location attribute. */ | |
14437 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
14438 | ptr += DW_BLOCK (member_loc)->size; | |
14439 | } | |
14440 | ||
14441 | *ptr++ = DW_OP_plus; | |
14442 | gdb_assert (ptr - baton->data == baton->size); | |
14443 | ||
0971de02 | 14444 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 14445 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
14446 | } |
14447 | ||
4357ac6c TT |
14448 | /* Create appropriate locally-scoped variables for all the |
14449 | DW_TAG_common_block entries. Also create a struct common_block | |
14450 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
14451 | is used to sepate the common blocks name namespace from regular | |
14452 | variable names. */ | |
c906108c SS |
14453 | |
14454 | static void | |
e7c27a73 | 14455 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14456 | { |
0971de02 TT |
14457 | struct attribute *attr; |
14458 | ||
14459 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
14460 | if (attr) | |
14461 | { | |
14462 | /* Support the .debug_loc offsets. */ | |
14463 | if (attr_form_is_block (attr)) | |
14464 | { | |
14465 | /* Ok. */ | |
14466 | } | |
14467 | else if (attr_form_is_section_offset (attr)) | |
14468 | { | |
14469 | dwarf2_complex_location_expr_complaint (); | |
14470 | attr = NULL; | |
14471 | } | |
14472 | else | |
14473 | { | |
14474 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14475 | "common block member"); | |
14476 | attr = NULL; | |
14477 | } | |
14478 | } | |
14479 | ||
639d11d3 | 14480 | if (die->child != NULL) |
c906108c | 14481 | { |
4357ac6c TT |
14482 | struct objfile *objfile = cu->objfile; |
14483 | struct die_info *child_die; | |
14484 | size_t n_entries = 0, size; | |
14485 | struct common_block *common_block; | |
14486 | struct symbol *sym; | |
74ac6d43 | 14487 | |
4357ac6c TT |
14488 | for (child_die = die->child; |
14489 | child_die && child_die->tag; | |
14490 | child_die = sibling_die (child_die)) | |
14491 | ++n_entries; | |
14492 | ||
14493 | size = (sizeof (struct common_block) | |
14494 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
14495 | common_block |
14496 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
14497 | size); | |
4357ac6c TT |
14498 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
14499 | common_block->n_entries = 0; | |
14500 | ||
14501 | for (child_die = die->child; | |
14502 | child_die && child_die->tag; | |
14503 | child_die = sibling_die (child_die)) | |
14504 | { | |
14505 | /* Create the symbol in the DW_TAG_common_block block in the current | |
14506 | symbol scope. */ | |
e7c27a73 | 14507 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
14508 | if (sym != NULL) |
14509 | { | |
14510 | struct attribute *member_loc; | |
14511 | ||
14512 | common_block->contents[common_block->n_entries++] = sym; | |
14513 | ||
14514 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
14515 | cu); | |
14516 | if (member_loc) | |
14517 | { | |
14518 | /* GDB has handled this for a long time, but it is | |
14519 | not specified by DWARF. It seems to have been | |
14520 | emitted by gfortran at least as recently as: | |
14521 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
14522 | complaint (&symfile_complaints, | |
14523 | _("Variable in common block has " | |
14524 | "DW_AT_data_member_location " | |
14525 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 14526 | to_underlying (child_die->sect_off), |
4262abfb | 14527 | objfile_name (cu->objfile)); |
0971de02 TT |
14528 | |
14529 | if (attr_form_is_section_offset (member_loc)) | |
14530 | dwarf2_complex_location_expr_complaint (); | |
14531 | else if (attr_form_is_constant (member_loc) | |
14532 | || attr_form_is_block (member_loc)) | |
14533 | { | |
14534 | if (attr) | |
14535 | mark_common_block_symbol_computed (sym, die, attr, | |
14536 | member_loc, cu); | |
14537 | } | |
14538 | else | |
14539 | dwarf2_complex_location_expr_complaint (); | |
14540 | } | |
14541 | } | |
c906108c | 14542 | } |
4357ac6c TT |
14543 | |
14544 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
14545 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
14546 | } |
14547 | } | |
14548 | ||
0114d602 | 14549 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 14550 | |
0114d602 DJ |
14551 | static struct type * |
14552 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 14553 | { |
e7c27a73 | 14554 | struct objfile *objfile = cu->objfile; |
0114d602 | 14555 | const char *previous_prefix, *name; |
9219021c | 14556 | int is_anonymous; |
0114d602 DJ |
14557 | struct type *type; |
14558 | ||
14559 | /* For extensions, reuse the type of the original namespace. */ | |
14560 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
14561 | { | |
14562 | struct die_info *ext_die; | |
14563 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 14564 | |
0114d602 DJ |
14565 | ext_die = dwarf2_extension (die, &ext_cu); |
14566 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
14567 | |
14568 | /* EXT_CU may not be the same as CU. | |
02142a6c | 14569 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
14570 | return set_die_type (die, type, cu); |
14571 | } | |
9219021c | 14572 | |
e142c38c | 14573 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
14574 | |
14575 | /* Now build the name of the current namespace. */ | |
14576 | ||
0114d602 DJ |
14577 | previous_prefix = determine_prefix (die, cu); |
14578 | if (previous_prefix[0] != '\0') | |
14579 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 14580 | previous_prefix, name, 0, cu); |
0114d602 DJ |
14581 | |
14582 | /* Create the type. */ | |
19f392bc | 14583 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
14584 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14585 | ||
60531b24 | 14586 | return set_die_type (die, type, cu); |
0114d602 DJ |
14587 | } |
14588 | ||
22cee43f | 14589 | /* Read a namespace scope. */ |
0114d602 DJ |
14590 | |
14591 | static void | |
14592 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14593 | { | |
14594 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14595 | int is_anonymous; |
9219021c | 14596 | |
5c4e30ca DC |
14597 | /* Add a symbol associated to this if we haven't seen the namespace |
14598 | before. Also, add a using directive if it's an anonymous | |
14599 | namespace. */ | |
9219021c | 14600 | |
f2f0e013 | 14601 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14602 | { |
14603 | struct type *type; | |
14604 | ||
0114d602 | 14605 | type = read_type_die (die, cu); |
e7c27a73 | 14606 | new_symbol (die, type, cu); |
5c4e30ca | 14607 | |
e8e80198 | 14608 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14609 | if (is_anonymous) |
0114d602 DJ |
14610 | { |
14611 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14612 | |
eb1e02fd | 14613 | std::vector<const char *> excludes; |
22cee43f PMR |
14614 | add_using_directive (using_directives (cu->language), |
14615 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 14616 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 14617 | } |
5c4e30ca | 14618 | } |
9219021c | 14619 | |
639d11d3 | 14620 | if (die->child != NULL) |
d9fa45fe | 14621 | { |
639d11d3 | 14622 | struct die_info *child_die = die->child; |
6e70227d | 14623 | |
d9fa45fe DC |
14624 | while (child_die && child_die->tag) |
14625 | { | |
e7c27a73 | 14626 | process_die (child_die, cu); |
d9fa45fe DC |
14627 | child_die = sibling_die (child_die); |
14628 | } | |
14629 | } | |
38d518c9 EZ |
14630 | } |
14631 | ||
f55ee35c JK |
14632 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14633 | imported module. Still we need that type as local Fortran "use ... only" | |
14634 | declaration imports depend on the created type in determine_prefix. */ | |
14635 | ||
14636 | static struct type * | |
14637 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14638 | { | |
14639 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14640 | const char *module_name; |
f55ee35c JK |
14641 | struct type *type; |
14642 | ||
14643 | module_name = dwarf2_name (die, cu); | |
14644 | if (!module_name) | |
3e43a32a MS |
14645 | complaint (&symfile_complaints, |
14646 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 14647 | to_underlying (die->sect_off)); |
19f392bc | 14648 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
14649 | |
14650 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14651 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14652 | ||
14653 | return set_die_type (die, type, cu); | |
14654 | } | |
14655 | ||
5d7cb8df JK |
14656 | /* Read a Fortran module. */ |
14657 | ||
14658 | static void | |
14659 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14660 | { | |
14661 | struct die_info *child_die = die->child; | |
530e8392 KB |
14662 | struct type *type; |
14663 | ||
14664 | type = read_type_die (die, cu); | |
14665 | new_symbol (die, type, cu); | |
5d7cb8df | 14666 | |
5d7cb8df JK |
14667 | while (child_die && child_die->tag) |
14668 | { | |
14669 | process_die (child_die, cu); | |
14670 | child_die = sibling_die (child_die); | |
14671 | } | |
14672 | } | |
14673 | ||
38d518c9 EZ |
14674 | /* Return the name of the namespace represented by DIE. Set |
14675 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14676 | namespace. */ | |
14677 | ||
14678 | static const char * | |
e142c38c | 14679 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14680 | { |
14681 | struct die_info *current_die; | |
14682 | const char *name = NULL; | |
14683 | ||
14684 | /* Loop through the extensions until we find a name. */ | |
14685 | ||
14686 | for (current_die = die; | |
14687 | current_die != NULL; | |
f2f0e013 | 14688 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14689 | { |
96553a0c DE |
14690 | /* We don't use dwarf2_name here so that we can detect the absence |
14691 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14692 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14693 | |
38d518c9 EZ |
14694 | if (name != NULL) |
14695 | break; | |
14696 | } | |
14697 | ||
14698 | /* Is it an anonymous namespace? */ | |
14699 | ||
14700 | *is_anonymous = (name == NULL); | |
14701 | if (*is_anonymous) | |
2b1dbab0 | 14702 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14703 | |
14704 | return name; | |
d9fa45fe DC |
14705 | } |
14706 | ||
c906108c SS |
14707 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14708 | the user defined type vector. */ | |
14709 | ||
f792889a | 14710 | static struct type * |
e7c27a73 | 14711 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14712 | { |
5e2b427d | 14713 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14714 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14715 | struct type *type; |
8b2dbe47 KB |
14716 | struct attribute *attr_byte_size; |
14717 | struct attribute *attr_address_class; | |
14718 | int byte_size, addr_class; | |
7e314c57 JK |
14719 | struct type *target_type; |
14720 | ||
14721 | target_type = die_type (die, cu); | |
c906108c | 14722 | |
7e314c57 JK |
14723 | /* The die_type call above may have already set the type for this DIE. */ |
14724 | type = get_die_type (die, cu); | |
14725 | if (type) | |
14726 | return type; | |
14727 | ||
14728 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14729 | |
e142c38c | 14730 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14731 | if (attr_byte_size) |
14732 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14733 | else |
8b2dbe47 KB |
14734 | byte_size = cu_header->addr_size; |
14735 | ||
e142c38c | 14736 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14737 | if (attr_address_class) |
14738 | addr_class = DW_UNSND (attr_address_class); | |
14739 | else | |
14740 | addr_class = DW_ADDR_none; | |
14741 | ||
14742 | /* If the pointer size or address class is different than the | |
14743 | default, create a type variant marked as such and set the | |
14744 | length accordingly. */ | |
14745 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14746 | { |
5e2b427d | 14747 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14748 | { |
14749 | int type_flags; | |
14750 | ||
849957d9 | 14751 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14752 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14753 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14754 | == 0); | |
8b2dbe47 KB |
14755 | type = make_type_with_address_space (type, type_flags); |
14756 | } | |
14757 | else if (TYPE_LENGTH (type) != byte_size) | |
14758 | { | |
3e43a32a MS |
14759 | complaint (&symfile_complaints, |
14760 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14761 | } |
6e70227d | 14762 | else |
9a619af0 MS |
14763 | { |
14764 | /* Should we also complain about unhandled address classes? */ | |
14765 | } | |
c906108c | 14766 | } |
8b2dbe47 KB |
14767 | |
14768 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14769 | return set_die_type (die, type, cu); |
c906108c SS |
14770 | } |
14771 | ||
14772 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14773 | the user defined type vector. */ | |
14774 | ||
f792889a | 14775 | static struct type * |
e7c27a73 | 14776 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14777 | { |
14778 | struct type *type; | |
14779 | struct type *to_type; | |
14780 | struct type *domain; | |
14781 | ||
e7c27a73 DJ |
14782 | to_type = die_type (die, cu); |
14783 | domain = die_containing_type (die, cu); | |
0d5de010 | 14784 | |
7e314c57 JK |
14785 | /* The calls above may have already set the type for this DIE. */ |
14786 | type = get_die_type (die, cu); | |
14787 | if (type) | |
14788 | return type; | |
14789 | ||
0d5de010 DJ |
14790 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14791 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14792 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14793 | { | |
14794 | struct type *new_type = alloc_type (cu->objfile); | |
14795 | ||
14796 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14797 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14798 | TYPE_VARARGS (to_type)); | |
14799 | type = lookup_methodptr_type (new_type); | |
14800 | } | |
0d5de010 DJ |
14801 | else |
14802 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14803 | |
f792889a | 14804 | return set_die_type (die, type, cu); |
c906108c SS |
14805 | } |
14806 | ||
4297a3f0 | 14807 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
14808 | the user defined type vector. */ |
14809 | ||
f792889a | 14810 | static struct type * |
4297a3f0 AV |
14811 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
14812 | enum type_code refcode) | |
c906108c | 14813 | { |
e7c27a73 | 14814 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14815 | struct type *type, *target_type; |
c906108c SS |
14816 | struct attribute *attr; |
14817 | ||
4297a3f0 AV |
14818 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
14819 | ||
7e314c57 JK |
14820 | target_type = die_type (die, cu); |
14821 | ||
14822 | /* The die_type call above may have already set the type for this DIE. */ | |
14823 | type = get_die_type (die, cu); | |
14824 | if (type) | |
14825 | return type; | |
14826 | ||
4297a3f0 | 14827 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 14828 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14829 | if (attr) |
14830 | { | |
14831 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14832 | } | |
14833 | else | |
14834 | { | |
107d2387 | 14835 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14836 | } |
f792889a | 14837 | return set_die_type (die, type, cu); |
c906108c SS |
14838 | } |
14839 | ||
cf363f18 MW |
14840 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14841 | outputs DWARF type qualifiers that apply to an array, not the | |
14842 | element type. But GDB relies on the array element type to carry | |
14843 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14844 | specification. */ | |
14845 | ||
14846 | static struct type * | |
14847 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14848 | struct type *base_type, int cnst, int voltl) | |
14849 | { | |
14850 | struct type *el_type, *inner_array; | |
14851 | ||
14852 | base_type = copy_type (base_type); | |
14853 | inner_array = base_type; | |
14854 | ||
14855 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14856 | { | |
14857 | TYPE_TARGET_TYPE (inner_array) = | |
14858 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14859 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14860 | } | |
14861 | ||
14862 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14863 | cnst |= TYPE_CONST (el_type); | |
14864 | voltl |= TYPE_VOLATILE (el_type); | |
14865 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14866 | ||
14867 | return set_die_type (die, base_type, cu); | |
14868 | } | |
14869 | ||
f792889a | 14870 | static struct type * |
e7c27a73 | 14871 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14872 | { |
f792889a | 14873 | struct type *base_type, *cv_type; |
c906108c | 14874 | |
e7c27a73 | 14875 | base_type = die_type (die, cu); |
7e314c57 JK |
14876 | |
14877 | /* The die_type call above may have already set the type for this DIE. */ | |
14878 | cv_type = get_die_type (die, cu); | |
14879 | if (cv_type) | |
14880 | return cv_type; | |
14881 | ||
2f608a3a KW |
14882 | /* In case the const qualifier is applied to an array type, the element type |
14883 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14884 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14885 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14886 | |
f792889a DJ |
14887 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14888 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14889 | } |
14890 | ||
f792889a | 14891 | static struct type * |
e7c27a73 | 14892 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14893 | { |
f792889a | 14894 | struct type *base_type, *cv_type; |
c906108c | 14895 | |
e7c27a73 | 14896 | base_type = die_type (die, cu); |
7e314c57 JK |
14897 | |
14898 | /* The die_type call above may have already set the type for this DIE. */ | |
14899 | cv_type = get_die_type (die, cu); | |
14900 | if (cv_type) | |
14901 | return cv_type; | |
14902 | ||
cf363f18 MW |
14903 | /* In case the volatile qualifier is applied to an array type, the |
14904 | element type is so qualified, not the array type (section 6.7.3 | |
14905 | of C99). */ | |
14906 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14907 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14908 | ||
f792889a DJ |
14909 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14910 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14911 | } |
14912 | ||
06d66ee9 TT |
14913 | /* Handle DW_TAG_restrict_type. */ |
14914 | ||
14915 | static struct type * | |
14916 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14917 | { | |
14918 | struct type *base_type, *cv_type; | |
14919 | ||
14920 | base_type = die_type (die, cu); | |
14921 | ||
14922 | /* The die_type call above may have already set the type for this DIE. */ | |
14923 | cv_type = get_die_type (die, cu); | |
14924 | if (cv_type) | |
14925 | return cv_type; | |
14926 | ||
14927 | cv_type = make_restrict_type (base_type); | |
14928 | return set_die_type (die, cv_type, cu); | |
14929 | } | |
14930 | ||
a2c2acaf MW |
14931 | /* Handle DW_TAG_atomic_type. */ |
14932 | ||
14933 | static struct type * | |
14934 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14935 | { | |
14936 | struct type *base_type, *cv_type; | |
14937 | ||
14938 | base_type = die_type (die, cu); | |
14939 | ||
14940 | /* The die_type call above may have already set the type for this DIE. */ | |
14941 | cv_type = get_die_type (die, cu); | |
14942 | if (cv_type) | |
14943 | return cv_type; | |
14944 | ||
14945 | cv_type = make_atomic_type (base_type); | |
14946 | return set_die_type (die, cv_type, cu); | |
14947 | } | |
14948 | ||
c906108c SS |
14949 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14950 | the user defined type vector. It isn't really a user defined type, | |
14951 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14952 | attribute to reference it. */ | |
14953 | ||
f792889a | 14954 | static struct type * |
e7c27a73 | 14955 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14956 | { |
e7c27a73 | 14957 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14958 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14959 | struct type *type, *range_type, *index_type, *char_type; |
14960 | struct attribute *attr; | |
14961 | unsigned int length; | |
14962 | ||
e142c38c | 14963 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14964 | if (attr) |
14965 | { | |
14966 | length = DW_UNSND (attr); | |
14967 | } | |
14968 | else | |
14969 | { | |
0963b4bd | 14970 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14971 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14972 | if (attr) |
14973 | { | |
14974 | length = DW_UNSND (attr); | |
14975 | } | |
14976 | else | |
14977 | { | |
14978 | length = 1; | |
14979 | } | |
c906108c | 14980 | } |
6ccb9162 | 14981 | |
46bf5051 | 14982 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14983 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14984 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14985 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14986 | |
f792889a | 14987 | return set_die_type (die, type, cu); |
c906108c SS |
14988 | } |
14989 | ||
4d804846 JB |
14990 | /* Assuming that DIE corresponds to a function, returns nonzero |
14991 | if the function is prototyped. */ | |
14992 | ||
14993 | static int | |
14994 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14995 | { | |
14996 | struct attribute *attr; | |
14997 | ||
14998 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14999 | if (attr && (DW_UNSND (attr) != 0)) | |
15000 | return 1; | |
15001 | ||
15002 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15003 | is only meaninful for C, but the concept also extends to other | |
15004 | languages that allow unprototyped functions (Eg: Objective C). | |
15005 | For all other languages, assume that functions are always | |
15006 | prototyped. */ | |
15007 | if (cu->language != language_c | |
15008 | && cu->language != language_objc | |
15009 | && cu->language != language_opencl) | |
15010 | return 1; | |
15011 | ||
15012 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15013 | prototyped and unprototyped functions; default to prototyped, | |
15014 | since that is more common in modern code (and RealView warns | |
15015 | about unprototyped functions). */ | |
15016 | if (producer_is_realview (cu->producer)) | |
15017 | return 1; | |
15018 | ||
15019 | return 0; | |
15020 | } | |
15021 | ||
c906108c SS |
15022 | /* Handle DIES due to C code like: |
15023 | ||
15024 | struct foo | |
c5aa993b JM |
15025 | { |
15026 | int (*funcp)(int a, long l); | |
15027 | int b; | |
15028 | }; | |
c906108c | 15029 | |
0963b4bd | 15030 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15031 | |
f792889a | 15032 | static struct type * |
e7c27a73 | 15033 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15034 | { |
bb5ed363 | 15035 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15036 | struct type *type; /* Type that this function returns. */ |
15037 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15038 | struct attribute *attr; |
15039 | ||
e7c27a73 | 15040 | type = die_type (die, cu); |
7e314c57 JK |
15041 | |
15042 | /* The die_type call above may have already set the type for this DIE. */ | |
15043 | ftype = get_die_type (die, cu); | |
15044 | if (ftype) | |
15045 | return ftype; | |
15046 | ||
0c8b41f1 | 15047 | ftype = lookup_function_type (type); |
c906108c | 15048 | |
4d804846 | 15049 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15050 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15051 | |
c055b101 CV |
15052 | /* Store the calling convention in the type if it's available in |
15053 | the subroutine die. Otherwise set the calling convention to | |
15054 | the default value DW_CC_normal. */ | |
15055 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15056 | if (attr) |
15057 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15058 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15059 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15060 | else | |
15061 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15062 | |
743649fd MW |
15063 | /* Record whether the function returns normally to its caller or not |
15064 | if the DWARF producer set that information. */ | |
15065 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15066 | if (attr && (DW_UNSND (attr) != 0)) | |
15067 | TYPE_NO_RETURN (ftype) = 1; | |
15068 | ||
76c10ea2 GM |
15069 | /* We need to add the subroutine type to the die immediately so |
15070 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15071 | declared as the same subroutine type. */ |
76c10ea2 | 15072 | set_die_type (die, ftype, cu); |
6e70227d | 15073 | |
639d11d3 | 15074 | if (die->child != NULL) |
c906108c | 15075 | { |
bb5ed363 | 15076 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15077 | struct die_info *child_die; |
8072405b | 15078 | int nparams, iparams; |
c906108c SS |
15079 | |
15080 | /* Count the number of parameters. | |
15081 | FIXME: GDB currently ignores vararg functions, but knows about | |
15082 | vararg member functions. */ | |
8072405b | 15083 | nparams = 0; |
639d11d3 | 15084 | child_die = die->child; |
c906108c SS |
15085 | while (child_die && child_die->tag) |
15086 | { | |
15087 | if (child_die->tag == DW_TAG_formal_parameter) | |
15088 | nparams++; | |
15089 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15090 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15091 | child_die = sibling_die (child_die); |
15092 | } | |
15093 | ||
15094 | /* Allocate storage for parameters and fill them in. */ | |
15095 | TYPE_NFIELDS (ftype) = nparams; | |
15096 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15097 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15098 | |
8072405b JK |
15099 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15100 | even if we error out during the parameters reading below. */ | |
15101 | for (iparams = 0; iparams < nparams; iparams++) | |
15102 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15103 | ||
15104 | iparams = 0; | |
639d11d3 | 15105 | child_die = die->child; |
c906108c SS |
15106 | while (child_die && child_die->tag) |
15107 | { | |
15108 | if (child_die->tag == DW_TAG_formal_parameter) | |
15109 | { | |
3ce3b1ba PA |
15110 | struct type *arg_type; |
15111 | ||
15112 | /* DWARF version 2 has no clean way to discern C++ | |
15113 | static and non-static member functions. G++ helps | |
15114 | GDB by marking the first parameter for non-static | |
15115 | member functions (which is the this pointer) as | |
15116 | artificial. We pass this information to | |
15117 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15118 | ||
15119 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15120 | 4.5 does not yet generate. */ | |
e142c38c | 15121 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15122 | if (attr) |
15123 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15124 | else | |
9c37b5ae | 15125 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15126 | arg_type = die_type (child_die, cu); |
15127 | ||
15128 | /* RealView does not mark THIS as const, which the testsuite | |
15129 | expects. GCC marks THIS as const in method definitions, | |
15130 | but not in the class specifications (GCC PR 43053). */ | |
15131 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15132 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15133 | { | |
15134 | int is_this = 0; | |
15135 | struct dwarf2_cu *arg_cu = cu; | |
15136 | const char *name = dwarf2_name (child_die, cu); | |
15137 | ||
15138 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15139 | if (attr) | |
15140 | { | |
15141 | /* If the compiler emits this, use it. */ | |
15142 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15143 | is_this = 1; | |
15144 | } | |
15145 | else if (name && strcmp (name, "this") == 0) | |
15146 | /* Function definitions will have the argument names. */ | |
15147 | is_this = 1; | |
15148 | else if (name == NULL && iparams == 0) | |
15149 | /* Declarations may not have the names, so like | |
15150 | elsewhere in GDB, assume an artificial first | |
15151 | argument is "this". */ | |
15152 | is_this = 1; | |
15153 | ||
15154 | if (is_this) | |
15155 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15156 | arg_type, 0); | |
15157 | } | |
15158 | ||
15159 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15160 | iparams++; |
15161 | } | |
15162 | child_die = sibling_die (child_die); | |
15163 | } | |
15164 | } | |
15165 | ||
76c10ea2 | 15166 | return ftype; |
c906108c SS |
15167 | } |
15168 | ||
f792889a | 15169 | static struct type * |
e7c27a73 | 15170 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15171 | { |
e7c27a73 | 15172 | struct objfile *objfile = cu->objfile; |
0114d602 | 15173 | const char *name = NULL; |
3c8e0968 | 15174 | struct type *this_type, *target_type; |
c906108c | 15175 | |
94af9270 | 15176 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
15177 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
15178 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 15179 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
15180 | target_type = die_type (die, cu); |
15181 | if (target_type != this_type) | |
15182 | TYPE_TARGET_TYPE (this_type) = target_type; | |
15183 | else | |
15184 | { | |
15185 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
15186 | spec and cause infinite loops in GDB. */ | |
15187 | complaint (&symfile_complaints, | |
15188 | _("Self-referential DW_TAG_typedef " | |
15189 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15190 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
15191 | TYPE_TARGET_TYPE (this_type) = NULL; |
15192 | } | |
f792889a | 15193 | return this_type; |
c906108c SS |
15194 | } |
15195 | ||
9b790ce7 UW |
15196 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
15197 | (which may be different from NAME) to the architecture back-end to allow | |
15198 | it to guess the correct format if necessary. */ | |
15199 | ||
15200 | static struct type * | |
15201 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
15202 | const char *name_hint) | |
15203 | { | |
15204 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15205 | const struct floatformat **format; | |
15206 | struct type *type; | |
15207 | ||
15208 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
15209 | if (format) | |
15210 | type = init_float_type (objfile, bits, name, format); | |
15211 | else | |
15212 | type = init_type (objfile, TYPE_CODE_ERROR, bits / TARGET_CHAR_BIT, name); | |
15213 | ||
15214 | return type; | |
15215 | } | |
15216 | ||
c906108c SS |
15217 | /* Find a representation of a given base type and install |
15218 | it in the TYPE field of the die. */ | |
15219 | ||
f792889a | 15220 | static struct type * |
e7c27a73 | 15221 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15222 | { |
e7c27a73 | 15223 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15224 | struct type *type; |
15225 | struct attribute *attr; | |
19f392bc | 15226 | int encoding = 0, bits = 0; |
15d034d0 | 15227 | const char *name; |
c906108c | 15228 | |
e142c38c | 15229 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
15230 | if (attr) |
15231 | { | |
15232 | encoding = DW_UNSND (attr); | |
15233 | } | |
e142c38c | 15234 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15235 | if (attr) |
15236 | { | |
19f392bc | 15237 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 15238 | } |
39cbfefa | 15239 | name = dwarf2_name (die, cu); |
6ccb9162 | 15240 | if (!name) |
c906108c | 15241 | { |
6ccb9162 UW |
15242 | complaint (&symfile_complaints, |
15243 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 15244 | } |
6ccb9162 UW |
15245 | |
15246 | switch (encoding) | |
c906108c | 15247 | { |
6ccb9162 UW |
15248 | case DW_ATE_address: |
15249 | /* Turn DW_ATE_address into a void * pointer. */ | |
19f392bc UW |
15250 | type = init_type (objfile, TYPE_CODE_VOID, 1, NULL); |
15251 | type = init_pointer_type (objfile, bits, name, type); | |
6ccb9162 UW |
15252 | break; |
15253 | case DW_ATE_boolean: | |
19f392bc | 15254 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
15255 | break; |
15256 | case DW_ATE_complex_float: | |
9b790ce7 | 15257 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 15258 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
15259 | break; |
15260 | case DW_ATE_decimal_float: | |
19f392bc | 15261 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
15262 | break; |
15263 | case DW_ATE_float: | |
9b790ce7 | 15264 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
15265 | break; |
15266 | case DW_ATE_signed: | |
19f392bc | 15267 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
15268 | break; |
15269 | case DW_ATE_unsigned: | |
3b2b8fea TT |
15270 | if (cu->language == language_fortran |
15271 | && name | |
61012eef | 15272 | && startswith (name, "character(")) |
19f392bc UW |
15273 | type = init_character_type (objfile, bits, 1, name); |
15274 | else | |
15275 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
15276 | break; |
15277 | case DW_ATE_signed_char: | |
6e70227d | 15278 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
15279 | || cu->language == language_pascal |
15280 | || cu->language == language_fortran) | |
19f392bc UW |
15281 | type = init_character_type (objfile, bits, 0, name); |
15282 | else | |
15283 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
15284 | break; |
15285 | case DW_ATE_unsigned_char: | |
868a0084 | 15286 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 15287 | || cu->language == language_pascal |
c44af4eb TT |
15288 | || cu->language == language_fortran |
15289 | || cu->language == language_rust) | |
19f392bc UW |
15290 | type = init_character_type (objfile, bits, 1, name); |
15291 | else | |
15292 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 15293 | break; |
75079b2b | 15294 | case DW_ATE_UTF: |
53e710ac PA |
15295 | { |
15296 | gdbarch *arch = get_objfile_arch (objfile); | |
15297 | ||
15298 | if (bits == 16) | |
15299 | type = builtin_type (arch)->builtin_char16; | |
15300 | else if (bits == 32) | |
15301 | type = builtin_type (arch)->builtin_char32; | |
15302 | else | |
15303 | { | |
15304 | complaint (&symfile_complaints, | |
15305 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
15306 | bits); | |
15307 | type = init_integer_type (objfile, bits, 1, name); | |
15308 | } | |
15309 | return set_die_type (die, type, cu); | |
15310 | } | |
75079b2b TT |
15311 | break; |
15312 | ||
6ccb9162 UW |
15313 | default: |
15314 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
15315 | dwarf_type_encoding_name (encoding)); | |
19f392bc UW |
15316 | type = init_type (objfile, TYPE_CODE_ERROR, |
15317 | bits / TARGET_CHAR_BIT, name); | |
6ccb9162 | 15318 | break; |
c906108c | 15319 | } |
6ccb9162 | 15320 | |
0114d602 | 15321 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 15322 | TYPE_NOSIGN (type) = 1; |
0114d602 | 15323 | |
f792889a | 15324 | return set_die_type (die, type, cu); |
c906108c SS |
15325 | } |
15326 | ||
80180f79 SA |
15327 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
15328 | resulting value of the attribute into struct bound_prop. | |
15329 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
15330 | ||
15331 | static int | |
15332 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
15333 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
15334 | { | |
15335 | struct dwarf2_property_baton *baton; | |
15336 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
15337 | ||
15338 | if (attr == NULL || prop == NULL) | |
15339 | return 0; | |
15340 | ||
15341 | if (attr_form_is_block (attr)) | |
15342 | { | |
8d749320 | 15343 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
15344 | baton->referenced_type = NULL; |
15345 | baton->locexpr.per_cu = cu->per_cu; | |
15346 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
15347 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
15348 | prop->data.baton = baton; | |
15349 | prop->kind = PROP_LOCEXPR; | |
15350 | gdb_assert (prop->data.baton != NULL); | |
15351 | } | |
15352 | else if (attr_form_is_ref (attr)) | |
15353 | { | |
15354 | struct dwarf2_cu *target_cu = cu; | |
15355 | struct die_info *target_die; | |
15356 | struct attribute *target_attr; | |
15357 | ||
15358 | target_die = follow_die_ref (die, attr, &target_cu); | |
15359 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
15360 | if (target_attr == NULL) |
15361 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
15362 | target_cu); | |
80180f79 SA |
15363 | if (target_attr == NULL) |
15364 | return 0; | |
15365 | ||
df25ebbd | 15366 | switch (target_attr->name) |
80180f79 | 15367 | { |
df25ebbd JB |
15368 | case DW_AT_location: |
15369 | if (attr_form_is_section_offset (target_attr)) | |
15370 | { | |
8d749320 | 15371 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15372 | baton->referenced_type = die_type (target_die, target_cu); |
15373 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
15374 | prop->data.baton = baton; | |
15375 | prop->kind = PROP_LOCLIST; | |
15376 | gdb_assert (prop->data.baton != NULL); | |
15377 | } | |
15378 | else if (attr_form_is_block (target_attr)) | |
15379 | { | |
8d749320 | 15380 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15381 | baton->referenced_type = die_type (target_die, target_cu); |
15382 | baton->locexpr.per_cu = cu->per_cu; | |
15383 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
15384 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
15385 | prop->data.baton = baton; | |
15386 | prop->kind = PROP_LOCEXPR; | |
15387 | gdb_assert (prop->data.baton != NULL); | |
15388 | } | |
15389 | else | |
15390 | { | |
15391 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15392 | "dynamic property"); | |
15393 | return 0; | |
15394 | } | |
15395 | break; | |
15396 | case DW_AT_data_member_location: | |
15397 | { | |
15398 | LONGEST offset; | |
15399 | ||
15400 | if (!handle_data_member_location (target_die, target_cu, | |
15401 | &offset)) | |
15402 | return 0; | |
15403 | ||
8d749320 | 15404 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
15405 | baton->referenced_type = read_type_die (target_die->parent, |
15406 | target_cu); | |
df25ebbd JB |
15407 | baton->offset_info.offset = offset; |
15408 | baton->offset_info.type = die_type (target_die, target_cu); | |
15409 | prop->data.baton = baton; | |
15410 | prop->kind = PROP_ADDR_OFFSET; | |
15411 | break; | |
15412 | } | |
80180f79 SA |
15413 | } |
15414 | } | |
15415 | else if (attr_form_is_constant (attr)) | |
15416 | { | |
15417 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
15418 | prop->kind = PROP_CONST; | |
15419 | } | |
15420 | else | |
15421 | { | |
15422 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
15423 | dwarf2_name (die, cu)); | |
15424 | return 0; | |
15425 | } | |
15426 | ||
15427 | return 1; | |
15428 | } | |
15429 | ||
a02abb62 JB |
15430 | /* Read the given DW_AT_subrange DIE. */ |
15431 | ||
f792889a | 15432 | static struct type * |
a02abb62 JB |
15433 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
15434 | { | |
4c9ad8c2 | 15435 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
15436 | struct type *range_type; |
15437 | struct attribute *attr; | |
729efb13 | 15438 | struct dynamic_prop low, high; |
4fae6e18 | 15439 | int low_default_is_valid; |
c451ebe5 | 15440 | int high_bound_is_count = 0; |
15d034d0 | 15441 | const char *name; |
43bbcdc2 | 15442 | LONGEST negative_mask; |
e77813c8 | 15443 | |
4c9ad8c2 TT |
15444 | orig_base_type = die_type (die, cu); |
15445 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
15446 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
15447 | creating the range type, but we use the result of check_typedef | |
15448 | when examining properties of the type. */ | |
15449 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 15450 | |
7e314c57 JK |
15451 | /* The die_type call above may have already set the type for this DIE. */ |
15452 | range_type = get_die_type (die, cu); | |
15453 | if (range_type) | |
15454 | return range_type; | |
15455 | ||
729efb13 SA |
15456 | low.kind = PROP_CONST; |
15457 | high.kind = PROP_CONST; | |
15458 | high.data.const_val = 0; | |
15459 | ||
4fae6e18 JK |
15460 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
15461 | omitting DW_AT_lower_bound. */ | |
15462 | switch (cu->language) | |
6e70227d | 15463 | { |
4fae6e18 JK |
15464 | case language_c: |
15465 | case language_cplus: | |
729efb13 | 15466 | low.data.const_val = 0; |
4fae6e18 JK |
15467 | low_default_is_valid = 1; |
15468 | break; | |
15469 | case language_fortran: | |
729efb13 | 15470 | low.data.const_val = 1; |
4fae6e18 JK |
15471 | low_default_is_valid = 1; |
15472 | break; | |
15473 | case language_d: | |
4fae6e18 | 15474 | case language_objc: |
c44af4eb | 15475 | case language_rust: |
729efb13 | 15476 | low.data.const_val = 0; |
4fae6e18 JK |
15477 | low_default_is_valid = (cu->header.version >= 4); |
15478 | break; | |
15479 | case language_ada: | |
15480 | case language_m2: | |
15481 | case language_pascal: | |
729efb13 | 15482 | low.data.const_val = 1; |
4fae6e18 JK |
15483 | low_default_is_valid = (cu->header.version >= 4); |
15484 | break; | |
15485 | default: | |
729efb13 | 15486 | low.data.const_val = 0; |
4fae6e18 JK |
15487 | low_default_is_valid = 0; |
15488 | break; | |
a02abb62 JB |
15489 | } |
15490 | ||
e142c38c | 15491 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 15492 | if (attr) |
11c1ba78 | 15493 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
15494 | else if (!low_default_is_valid) |
15495 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
15496 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15497 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 15498 | |
e142c38c | 15499 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 15500 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
15501 | { |
15502 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 15503 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 15504 | { |
c451ebe5 SA |
15505 | /* If bounds are constant do the final calculation here. */ |
15506 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
15507 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15508 | else | |
15509 | high_bound_is_count = 1; | |
c2ff108b | 15510 | } |
e77813c8 PM |
15511 | } |
15512 | ||
15513 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15514 | without specifying a base type. | |
15515 | In that case, the base type must be set to the type of | |
15516 | the lower bound, upper bound or count, in that order, if any of these | |
15517 | three attributes references an object that has a type. | |
15518 | If no base type is found, the Dwarf-2 specifications say that | |
15519 | a signed integer type of size equal to the size of an address should | |
15520 | be used. | |
15521 | For the following C code: `extern char gdb_int [];' | |
15522 | GCC produces an empty range DIE. | |
15523 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15524 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15525 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15526 | { | |
15527 | struct objfile *objfile = cu->objfile; | |
15528 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15529 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15530 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15531 | ||
15532 | /* Test "int", "long int", and "long long int" objfile types, | |
15533 | and select the first one having a size above or equal to the | |
15534 | architecture address size. */ | |
15535 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15536 | base_type = int_type; | |
15537 | else | |
15538 | { | |
15539 | int_type = objfile_type (objfile)->builtin_long; | |
15540 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15541 | base_type = int_type; | |
15542 | else | |
15543 | { | |
15544 | int_type = objfile_type (objfile)->builtin_long_long; | |
15545 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15546 | base_type = int_type; | |
15547 | } | |
15548 | } | |
15549 | } | |
a02abb62 | 15550 | |
dbb9c2b1 JB |
15551 | /* Normally, the DWARF producers are expected to use a signed |
15552 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15553 | But this is unfortunately not always the case, as witnessed | |
15554 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15555 | is used instead. To work around that ambiguity, we treat | |
15556 | the bounds as signed, and thus sign-extend their values, when | |
15557 | the base type is signed. */ | |
6e70227d | 15558 | negative_mask = |
66c6502d | 15559 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15560 | if (low.kind == PROP_CONST |
15561 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15562 | low.data.const_val |= negative_mask; | |
15563 | if (high.kind == PROP_CONST | |
15564 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15565 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15566 | |
729efb13 | 15567 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15568 | |
c451ebe5 SA |
15569 | if (high_bound_is_count) |
15570 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15571 | ||
c2ff108b JK |
15572 | /* Ada expects an empty array on no boundary attributes. */ |
15573 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15574 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15575 | |
39cbfefa DJ |
15576 | name = dwarf2_name (die, cu); |
15577 | if (name) | |
15578 | TYPE_NAME (range_type) = name; | |
6e70227d | 15579 | |
e142c38c | 15580 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15581 | if (attr) |
15582 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15583 | ||
7e314c57 JK |
15584 | set_die_type (die, range_type, cu); |
15585 | ||
15586 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15587 | set_descriptive_type (range_type, die, cu); |
15588 | ||
7e314c57 | 15589 | return range_type; |
a02abb62 | 15590 | } |
6e70227d | 15591 | |
f792889a | 15592 | static struct type * |
81a17f79 JB |
15593 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15594 | { | |
15595 | struct type *type; | |
81a17f79 | 15596 | |
81a17f79 JB |
15597 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15598 | ||
19f392bc | 15599 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 15600 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 15601 | |
f792889a | 15602 | return set_die_type (die, type, cu); |
81a17f79 | 15603 | } |
a02abb62 | 15604 | |
639d11d3 DC |
15605 | /* Read a single die and all its descendents. Set the die's sibling |
15606 | field to NULL; set other fields in the die correctly, and set all | |
15607 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15608 | location of the info_ptr after reading all of those dies. PARENT | |
15609 | is the parent of the die in question. */ | |
15610 | ||
15611 | static struct die_info * | |
dee91e82 | 15612 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15613 | const gdb_byte *info_ptr, |
15614 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15615 | struct die_info *parent) |
639d11d3 DC |
15616 | { |
15617 | struct die_info *die; | |
d521ce57 | 15618 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15619 | int has_children; |
15620 | ||
bf6af496 | 15621 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15622 | if (die == NULL) |
15623 | { | |
15624 | *new_info_ptr = cur_ptr; | |
15625 | return NULL; | |
15626 | } | |
93311388 | 15627 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15628 | |
15629 | if (has_children) | |
bf6af496 | 15630 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15631 | else |
15632 | { | |
15633 | die->child = NULL; | |
15634 | *new_info_ptr = cur_ptr; | |
15635 | } | |
15636 | ||
15637 | die->sibling = NULL; | |
15638 | die->parent = parent; | |
15639 | return die; | |
15640 | } | |
15641 | ||
15642 | /* Read a die, all of its descendents, and all of its siblings; set | |
15643 | all of the fields of all of the dies correctly. Arguments are as | |
15644 | in read_die_and_children. */ | |
15645 | ||
15646 | static struct die_info * | |
bf6af496 | 15647 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15648 | const gdb_byte *info_ptr, |
15649 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15650 | struct die_info *parent) |
639d11d3 DC |
15651 | { |
15652 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15653 | const gdb_byte *cur_ptr; |
639d11d3 | 15654 | |
c906108c | 15655 | cur_ptr = info_ptr; |
639d11d3 DC |
15656 | first_die = last_sibling = NULL; |
15657 | ||
15658 | while (1) | |
c906108c | 15659 | { |
639d11d3 | 15660 | struct die_info *die |
dee91e82 | 15661 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15662 | |
1d325ec1 | 15663 | if (die == NULL) |
c906108c | 15664 | { |
639d11d3 DC |
15665 | *new_info_ptr = cur_ptr; |
15666 | return first_die; | |
c906108c | 15667 | } |
1d325ec1 DJ |
15668 | |
15669 | if (!first_die) | |
15670 | first_die = die; | |
c906108c | 15671 | else |
1d325ec1 DJ |
15672 | last_sibling->sibling = die; |
15673 | ||
15674 | last_sibling = die; | |
c906108c | 15675 | } |
c906108c SS |
15676 | } |
15677 | ||
bf6af496 DE |
15678 | /* Read a die, all of its descendents, and all of its siblings; set |
15679 | all of the fields of all of the dies correctly. Arguments are as | |
15680 | in read_die_and_children. | |
15681 | This the main entry point for reading a DIE and all its children. */ | |
15682 | ||
15683 | static struct die_info * | |
15684 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15685 | const gdb_byte *info_ptr, |
15686 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15687 | struct die_info *parent) |
15688 | { | |
15689 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15690 | new_info_ptr, parent); | |
15691 | ||
b4f54984 | 15692 | if (dwarf_die_debug) |
bf6af496 DE |
15693 | { |
15694 | fprintf_unfiltered (gdb_stdlog, | |
15695 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15696 | get_section_name (reader->die_section), |
bf6af496 DE |
15697 | (unsigned) (info_ptr - reader->die_section->buffer), |
15698 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15699 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15700 | } |
15701 | ||
15702 | return die; | |
15703 | } | |
15704 | ||
3019eac3 DE |
15705 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15706 | attributes. | |
15707 | The caller is responsible for filling in the extra attributes | |
15708 | and updating (*DIEP)->num_attrs. | |
15709 | Set DIEP to point to a newly allocated die with its information, | |
15710 | except for its child, sibling, and parent fields. | |
15711 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 15712 | |
d521ce57 | 15713 | static const gdb_byte * |
3019eac3 | 15714 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15715 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15716 | int *has_children, int num_extra_attrs) |
93311388 | 15717 | { |
b64f50a1 | 15718 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
15719 | struct abbrev_info *abbrev; |
15720 | struct die_info *die; | |
15721 | struct dwarf2_cu *cu = reader->cu; | |
15722 | bfd *abfd = reader->abfd; | |
15723 | ||
9c541725 | 15724 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
15725 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15726 | info_ptr += bytes_read; | |
15727 | if (!abbrev_number) | |
15728 | { | |
15729 | *diep = NULL; | |
15730 | *has_children = 0; | |
15731 | return info_ptr; | |
15732 | } | |
15733 | ||
433df2d4 | 15734 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15735 | if (!abbrev) |
348e048f DE |
15736 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15737 | abbrev_number, | |
15738 | bfd_get_filename (abfd)); | |
15739 | ||
3019eac3 | 15740 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 15741 | die->sect_off = sect_off; |
93311388 DE |
15742 | die->tag = abbrev->tag; |
15743 | die->abbrev = abbrev_number; | |
15744 | ||
3019eac3 DE |
15745 | /* Make the result usable. |
15746 | The caller needs to update num_attrs after adding the extra | |
15747 | attributes. */ | |
93311388 DE |
15748 | die->num_attrs = abbrev->num_attrs; |
15749 | ||
15750 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15751 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15752 | info_ptr); | |
93311388 DE |
15753 | |
15754 | *diep = die; | |
15755 | *has_children = abbrev->has_children; | |
15756 | return info_ptr; | |
15757 | } | |
15758 | ||
3019eac3 DE |
15759 | /* Read a die and all its attributes. |
15760 | Set DIEP to point to a newly allocated die with its information, | |
15761 | except for its child, sibling, and parent fields. | |
15762 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15763 | ||
d521ce57 | 15764 | static const gdb_byte * |
3019eac3 | 15765 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15766 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15767 | int *has_children) |
15768 | { | |
d521ce57 | 15769 | const gdb_byte *result; |
bf6af496 DE |
15770 | |
15771 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15772 | ||
b4f54984 | 15773 | if (dwarf_die_debug) |
bf6af496 DE |
15774 | { |
15775 | fprintf_unfiltered (gdb_stdlog, | |
15776 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15777 | get_section_name (reader->die_section), |
bf6af496 DE |
15778 | (unsigned) (info_ptr - reader->die_section->buffer), |
15779 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15780 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15781 | } |
15782 | ||
15783 | return result; | |
3019eac3 | 15784 | } |
433df2d4 DE |
15785 | \f |
15786 | /* Abbreviation tables. | |
3019eac3 | 15787 | |
433df2d4 | 15788 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15789 | stored in a separate .debug_abbrev section. Before we read any |
15790 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15791 | in a hash table. */ |
15792 | ||
15793 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15794 | ||
15795 | static struct abbrev_info * | |
15796 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15797 | { | |
15798 | struct abbrev_info *abbrev; | |
15799 | ||
8d749320 | 15800 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15801 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15802 | |
433df2d4 DE |
15803 | return abbrev; |
15804 | } | |
15805 | ||
15806 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15807 | |
15808 | static void | |
433df2d4 DE |
15809 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15810 | unsigned int abbrev_number, | |
15811 | struct abbrev_info *abbrev) | |
15812 | { | |
15813 | unsigned int hash_number; | |
15814 | ||
15815 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15816 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15817 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15818 | } | |
dee91e82 | 15819 | |
433df2d4 DE |
15820 | /* Look up an abbrev in the table. |
15821 | Returns NULL if the abbrev is not found. */ | |
15822 | ||
15823 | static struct abbrev_info * | |
15824 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15825 | unsigned int abbrev_number) | |
c906108c | 15826 | { |
433df2d4 DE |
15827 | unsigned int hash_number; |
15828 | struct abbrev_info *abbrev; | |
15829 | ||
15830 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15831 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15832 | ||
15833 | while (abbrev) | |
15834 | { | |
15835 | if (abbrev->number == abbrev_number) | |
15836 | return abbrev; | |
15837 | abbrev = abbrev->next; | |
15838 | } | |
15839 | return NULL; | |
15840 | } | |
15841 | ||
15842 | /* Read in an abbrev table. */ | |
15843 | ||
15844 | static struct abbrev_table * | |
15845 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 15846 | sect_offset sect_off) |
433df2d4 DE |
15847 | { |
15848 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15849 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15850 | struct abbrev_table *abbrev_table; |
d521ce57 | 15851 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15852 | struct abbrev_info *cur_abbrev; |
15853 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15854 | unsigned int abbrev_form; |
f3dd6933 DJ |
15855 | struct attr_abbrev *cur_attrs; |
15856 | unsigned int allocated_attrs; | |
c906108c | 15857 | |
70ba0933 | 15858 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 15859 | abbrev_table->sect_off = sect_off; |
433df2d4 | 15860 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15861 | abbrev_table->abbrevs = |
15862 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15863 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15864 | memset (abbrev_table->abbrevs, 0, |
15865 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15866 | |
433df2d4 | 15867 | dwarf2_read_section (objfile, section); |
9c541725 | 15868 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
15869 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15870 | abbrev_ptr += bytes_read; | |
15871 | ||
f3dd6933 | 15872 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15873 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15874 | |
0963b4bd | 15875 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15876 | while (abbrev_number) |
15877 | { | |
433df2d4 | 15878 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15879 | |
15880 | /* read in abbrev header */ | |
15881 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15882 | cur_abbrev->tag |
15883 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15884 | abbrev_ptr += bytes_read; |
15885 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15886 | abbrev_ptr += 1; | |
15887 | ||
15888 | /* now read in declarations */ | |
22d2f3ab | 15889 | for (;;) |
c906108c | 15890 | { |
43988095 JK |
15891 | LONGEST implicit_const; |
15892 | ||
22d2f3ab JK |
15893 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15894 | abbrev_ptr += bytes_read; | |
15895 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15896 | abbrev_ptr += bytes_read; | |
43988095 JK |
15897 | if (abbrev_form == DW_FORM_implicit_const) |
15898 | { | |
15899 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
15900 | &bytes_read); | |
15901 | abbrev_ptr += bytes_read; | |
15902 | } | |
15903 | else | |
15904 | { | |
15905 | /* Initialize it due to a false compiler warning. */ | |
15906 | implicit_const = -1; | |
15907 | } | |
22d2f3ab JK |
15908 | |
15909 | if (abbrev_name == 0) | |
15910 | break; | |
15911 | ||
f3dd6933 | 15912 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15913 | { |
f3dd6933 DJ |
15914 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15915 | cur_attrs | |
224c3ddb | 15916 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15917 | } |
ae038cb0 | 15918 | |
aead7601 SM |
15919 | cur_attrs[cur_abbrev->num_attrs].name |
15920 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 15921 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 15922 | = (enum dwarf_form) abbrev_form; |
43988095 | 15923 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 15924 | ++cur_abbrev->num_attrs; |
c906108c SS |
15925 | } |
15926 | ||
8d749320 SM |
15927 | cur_abbrev->attrs = |
15928 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15929 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15930 | memcpy (cur_abbrev->attrs, cur_attrs, |
15931 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15932 | ||
433df2d4 | 15933 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15934 | |
15935 | /* Get next abbreviation. | |
15936 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15937 | always properly terminated with an abbrev number of 0. |
15938 | Exit loop if we encounter an abbreviation which we have | |
15939 | already read (which means we are about to read the abbreviations | |
15940 | for the next compile unit) or if the end of the abbreviation | |
15941 | table is reached. */ | |
433df2d4 | 15942 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15943 | break; |
15944 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15945 | abbrev_ptr += bytes_read; | |
433df2d4 | 15946 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15947 | break; |
15948 | } | |
f3dd6933 DJ |
15949 | |
15950 | xfree (cur_attrs); | |
433df2d4 | 15951 | return abbrev_table; |
c906108c SS |
15952 | } |
15953 | ||
433df2d4 | 15954 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15955 | |
c906108c | 15956 | static void |
433df2d4 | 15957 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15958 | { |
433df2d4 DE |
15959 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15960 | xfree (abbrev_table); | |
c906108c SS |
15961 | } |
15962 | ||
f4dc4d17 DE |
15963 | /* Same as abbrev_table_free but as a cleanup. |
15964 | We pass in a pointer to the pointer to the table so that we can | |
15965 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15966 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15967 | |
15968 | static void | |
15969 | abbrev_table_free_cleanup (void *table_ptr) | |
15970 | { | |
9a3c8263 | 15971 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15972 | |
15973 | if (*abbrev_table_ptr != NULL) | |
15974 | abbrev_table_free (*abbrev_table_ptr); | |
15975 | *abbrev_table_ptr = NULL; | |
15976 | } | |
15977 | ||
433df2d4 DE |
15978 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15979 | ||
15980 | static void | |
15981 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15982 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15983 | { |
433df2d4 | 15984 | cu->abbrev_table = |
9c541725 | 15985 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 15986 | } |
c906108c | 15987 | |
433df2d4 | 15988 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15989 | |
433df2d4 DE |
15990 | static void |
15991 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15992 | { | |
9a3c8263 | 15993 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15994 | |
a2ce51a0 DE |
15995 | if (cu->abbrev_table != NULL) |
15996 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15997 | /* Set this to NULL so that we SEGV if we try to read it later, |
15998 | and also because free_comp_unit verifies this is NULL. */ | |
15999 | cu->abbrev_table = NULL; | |
16000 | } | |
16001 | \f | |
72bf9492 DJ |
16002 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16003 | symbol for. */ | |
16004 | ||
16005 | static int | |
16006 | is_type_tag_for_partial (int tag) | |
16007 | { | |
16008 | switch (tag) | |
16009 | { | |
16010 | #if 0 | |
16011 | /* Some types that would be reasonable to generate partial symbols for, | |
16012 | that we don't at present. */ | |
16013 | case DW_TAG_array_type: | |
16014 | case DW_TAG_file_type: | |
16015 | case DW_TAG_ptr_to_member_type: | |
16016 | case DW_TAG_set_type: | |
16017 | case DW_TAG_string_type: | |
16018 | case DW_TAG_subroutine_type: | |
16019 | #endif | |
16020 | case DW_TAG_base_type: | |
16021 | case DW_TAG_class_type: | |
680b30c7 | 16022 | case DW_TAG_interface_type: |
72bf9492 DJ |
16023 | case DW_TAG_enumeration_type: |
16024 | case DW_TAG_structure_type: | |
16025 | case DW_TAG_subrange_type: | |
16026 | case DW_TAG_typedef: | |
16027 | case DW_TAG_union_type: | |
16028 | return 1; | |
16029 | default: | |
16030 | return 0; | |
16031 | } | |
16032 | } | |
16033 | ||
16034 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16035 | ||
16036 | static struct partial_die_info * | |
dee91e82 | 16037 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16038 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16039 | { |
dee91e82 | 16040 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16041 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16042 | struct partial_die_info *part_die; |
16043 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16044 | struct abbrev_info *abbrev; | |
16045 | unsigned int bytes_read; | |
5afb4e99 | 16046 | unsigned int load_all = 0; |
72bf9492 DJ |
16047 | int nesting_level = 1; |
16048 | ||
16049 | parent_die = NULL; | |
16050 | last_die = NULL; | |
16051 | ||
7adf1e79 DE |
16052 | gdb_assert (cu->per_cu != NULL); |
16053 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16054 | load_all = 1; |
16055 | ||
72bf9492 DJ |
16056 | cu->partial_dies |
16057 | = htab_create_alloc_ex (cu->header.length / 12, | |
16058 | partial_die_hash, | |
16059 | partial_die_eq, | |
16060 | NULL, | |
16061 | &cu->comp_unit_obstack, | |
16062 | hashtab_obstack_allocate, | |
16063 | dummy_obstack_deallocate); | |
16064 | ||
8d749320 | 16065 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16066 | |
16067 | while (1) | |
16068 | { | |
16069 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16070 | ||
16071 | /* A NULL abbrev means the end of a series of children. */ | |
16072 | if (abbrev == NULL) | |
16073 | { | |
16074 | if (--nesting_level == 0) | |
16075 | { | |
16076 | /* PART_DIE was probably the last thing allocated on the | |
16077 | comp_unit_obstack, so we could call obstack_free | |
16078 | here. We don't do that because the waste is small, | |
16079 | and will be cleaned up when we're done with this | |
16080 | compilation unit. This way, we're also more robust | |
16081 | against other users of the comp_unit_obstack. */ | |
16082 | return first_die; | |
16083 | } | |
16084 | info_ptr += bytes_read; | |
16085 | last_die = parent_die; | |
16086 | parent_die = parent_die->die_parent; | |
16087 | continue; | |
16088 | } | |
16089 | ||
98bfdba5 PA |
16090 | /* Check for template arguments. We never save these; if |
16091 | they're seen, we just mark the parent, and go on our way. */ | |
16092 | if (parent_die != NULL | |
16093 | && cu->language == language_cplus | |
16094 | && (abbrev->tag == DW_TAG_template_type_param | |
16095 | || abbrev->tag == DW_TAG_template_value_param)) | |
16096 | { | |
16097 | parent_die->has_template_arguments = 1; | |
16098 | ||
16099 | if (!load_all) | |
16100 | { | |
16101 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16102 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16103 | continue; |
16104 | } | |
16105 | } | |
16106 | ||
0d99eb77 | 16107 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16108 | Skip their other children. */ |
16109 | if (!load_all | |
16110 | && cu->language == language_cplus | |
16111 | && parent_die != NULL | |
16112 | && parent_die->tag == DW_TAG_subprogram) | |
16113 | { | |
dee91e82 | 16114 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16115 | continue; |
16116 | } | |
16117 | ||
5afb4e99 DJ |
16118 | /* Check whether this DIE is interesting enough to save. Normally |
16119 | we would not be interested in members here, but there may be | |
16120 | later variables referencing them via DW_AT_specification (for | |
16121 | static members). */ | |
16122 | if (!load_all | |
16123 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16124 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16125 | && abbrev->tag != DW_TAG_enumerator |
16126 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16127 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16128 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16129 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16130 | && abbrev->tag != DW_TAG_module |
95554aad | 16131 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16132 | && abbrev->tag != DW_TAG_imported_unit |
16133 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16134 | { |
16135 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16136 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16137 | continue; |
16138 | } | |
16139 | ||
dee91e82 DE |
16140 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16141 | info_ptr); | |
72bf9492 DJ |
16142 | |
16143 | /* This two-pass algorithm for processing partial symbols has a | |
16144 | high cost in cache pressure. Thus, handle some simple cases | |
16145 | here which cover the majority of C partial symbols. DIEs | |
16146 | which neither have specification tags in them, nor could have | |
16147 | specification tags elsewhere pointing at them, can simply be | |
16148 | processed and discarded. | |
16149 | ||
16150 | This segment is also optional; scan_partial_symbols and | |
16151 | add_partial_symbol will handle these DIEs if we chain | |
16152 | them in normally. When compilers which do not emit large | |
16153 | quantities of duplicate debug information are more common, | |
16154 | this code can probably be removed. */ | |
16155 | ||
16156 | /* Any complete simple types at the top level (pretty much all | |
16157 | of them, for a language without namespaces), can be processed | |
16158 | directly. */ | |
16159 | if (parent_die == NULL | |
16160 | && part_die->has_specification == 0 | |
16161 | && part_die->is_declaration == 0 | |
d8228535 | 16162 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16163 | || part_die->tag == DW_TAG_base_type |
16164 | || part_die->tag == DW_TAG_subrange_type)) | |
16165 | { | |
16166 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16167 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16168 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16169 | &objfile->static_psymbols, |
1762568f | 16170 | 0, cu->language, objfile); |
dee91e82 | 16171 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16172 | continue; |
16173 | } | |
16174 | ||
d8228535 JK |
16175 | /* The exception for DW_TAG_typedef with has_children above is |
16176 | a workaround of GCC PR debug/47510. In the case of this complaint | |
16177 | type_name_no_tag_or_error will error on such types later. | |
16178 | ||
16179 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
16180 | it could not find the child DIEs referenced later, this is checked | |
16181 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
16182 | ||
16183 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
16184 | complaint (&symfile_complaints, | |
16185 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
16186 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16187 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 16188 | |
72bf9492 DJ |
16189 | /* If we're at the second level, and we're an enumerator, and |
16190 | our parent has no specification (meaning possibly lives in a | |
16191 | namespace elsewhere), then we can add the partial symbol now | |
16192 | instead of queueing it. */ | |
16193 | if (part_die->tag == DW_TAG_enumerator | |
16194 | && parent_die != NULL | |
16195 | && parent_die->die_parent == NULL | |
16196 | && parent_die->tag == DW_TAG_enumeration_type | |
16197 | && parent_die->has_specification == 0) | |
16198 | { | |
16199 | if (part_die->name == NULL) | |
3e43a32a MS |
16200 | complaint (&symfile_complaints, |
16201 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 16202 | else if (building_psymtab) |
04a679b8 | 16203 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16204 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 16205 | cu->language == language_cplus |
bb5ed363 DE |
16206 | ? &objfile->global_psymbols |
16207 | : &objfile->static_psymbols, | |
1762568f | 16208 | 0, cu->language, objfile); |
72bf9492 | 16209 | |
dee91e82 | 16210 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16211 | continue; |
16212 | } | |
16213 | ||
16214 | /* We'll save this DIE so link it in. */ | |
16215 | part_die->die_parent = parent_die; | |
16216 | part_die->die_sibling = NULL; | |
16217 | part_die->die_child = NULL; | |
16218 | ||
16219 | if (last_die && last_die == parent_die) | |
16220 | last_die->die_child = part_die; | |
16221 | else if (last_die) | |
16222 | last_die->die_sibling = part_die; | |
16223 | ||
16224 | last_die = part_die; | |
16225 | ||
16226 | if (first_die == NULL) | |
16227 | first_die = part_die; | |
16228 | ||
16229 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
16230 | find interesting need to be in the hash table, because we | |
16231 | also have the parent/sibling/child chains; only those that we | |
16232 | might refer to by offset later during partial symbol reading. | |
16233 | ||
16234 | For now this means things that might have be the target of a | |
16235 | DW_AT_specification, DW_AT_abstract_origin, or | |
16236 | DW_AT_extension. DW_AT_extension will refer only to | |
16237 | namespaces; DW_AT_abstract_origin refers to functions (and | |
16238 | many things under the function DIE, but we do not recurse | |
16239 | into function DIEs during partial symbol reading) and | |
16240 | possibly variables as well; DW_AT_specification refers to | |
16241 | declarations. Declarations ought to have the DW_AT_declaration | |
16242 | flag. It happens that GCC forgets to put it in sometimes, but | |
16243 | only for functions, not for types. | |
16244 | ||
16245 | Adding more things than necessary to the hash table is harmless | |
16246 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
16247 | wasted time in find_partial_die, when we reread the compilation |
16248 | unit with load_all_dies set. */ | |
72bf9492 | 16249 | |
5afb4e99 | 16250 | if (load_all |
72929c62 | 16251 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 16252 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
16253 | || abbrev->tag == DW_TAG_variable |
16254 | || abbrev->tag == DW_TAG_namespace | |
16255 | || part_die->is_declaration) | |
16256 | { | |
16257 | void **slot; | |
16258 | ||
16259 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
16260 | to_underlying (part_die->sect_off), |
16261 | INSERT); | |
72bf9492 DJ |
16262 | *slot = part_die; |
16263 | } | |
16264 | ||
8d749320 | 16265 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16266 | |
16267 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 16268 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
16269 | languages we have to, so that we can get at method physnames |
16270 | to infer fully qualified class names, for DW_AT_specification, | |
16271 | and for C++ template arguments. For C++, we also look one level | |
16272 | inside functions to find template arguments (if the name of the | |
16273 | function does not already contain the template arguments). | |
bc30ff58 JB |
16274 | |
16275 | For Ada, we need to scan the children of subprograms and lexical | |
16276 | blocks as well because Ada allows the definition of nested | |
16277 | entities that could be interesting for the debugger, such as | |
16278 | nested subprograms for instance. */ | |
72bf9492 | 16279 | if (last_die->has_children |
5afb4e99 DJ |
16280 | && (load_all |
16281 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 16282 | || last_die->tag == DW_TAG_module |
72bf9492 | 16283 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
16284 | || (cu->language == language_cplus |
16285 | && last_die->tag == DW_TAG_subprogram | |
16286 | && (last_die->name == NULL | |
16287 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
16288 | || (cu->language != language_c |
16289 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 16290 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 16291 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
16292 | || last_die->tag == DW_TAG_union_type)) |
16293 | || (cu->language == language_ada | |
16294 | && (last_die->tag == DW_TAG_subprogram | |
16295 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
16296 | { |
16297 | nesting_level++; | |
16298 | parent_die = last_die; | |
16299 | continue; | |
16300 | } | |
16301 | ||
16302 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16303 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
16304 | |
16305 | /* Back to the top, do it again. */ | |
16306 | } | |
16307 | } | |
16308 | ||
c906108c SS |
16309 | /* Read a minimal amount of information into the minimal die structure. */ |
16310 | ||
d521ce57 | 16311 | static const gdb_byte * |
dee91e82 DE |
16312 | read_partial_die (const struct die_reader_specs *reader, |
16313 | struct partial_die_info *part_die, | |
16314 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 16315 | const gdb_byte *info_ptr) |
c906108c | 16316 | { |
dee91e82 | 16317 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16318 | struct objfile *objfile = cu->objfile; |
d521ce57 | 16319 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 16320 | unsigned int i; |
c906108c | 16321 | struct attribute attr; |
c5aa993b | 16322 | int has_low_pc_attr = 0; |
c906108c | 16323 | int has_high_pc_attr = 0; |
91da1414 | 16324 | int high_pc_relative = 0; |
c906108c | 16325 | |
72bf9492 | 16326 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 16327 | |
9c541725 | 16328 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
16329 | |
16330 | info_ptr += abbrev_len; | |
16331 | ||
16332 | if (abbrev == NULL) | |
16333 | return info_ptr; | |
16334 | ||
c906108c SS |
16335 | part_die->tag = abbrev->tag; |
16336 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
16337 | |
16338 | for (i = 0; i < abbrev->num_attrs; ++i) | |
16339 | { | |
dee91e82 | 16340 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
16341 | |
16342 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 16343 | partial symbol table. */ |
c906108c SS |
16344 | switch (attr.name) |
16345 | { | |
16346 | case DW_AT_name: | |
71c25dea TT |
16347 | switch (part_die->tag) |
16348 | { | |
16349 | case DW_TAG_compile_unit: | |
95554aad | 16350 | case DW_TAG_partial_unit: |
348e048f | 16351 | case DW_TAG_type_unit: |
71c25dea TT |
16352 | /* Compilation units have a DW_AT_name that is a filename, not |
16353 | a source language identifier. */ | |
16354 | case DW_TAG_enumeration_type: | |
16355 | case DW_TAG_enumerator: | |
16356 | /* These tags always have simple identifiers already; no need | |
16357 | to canonicalize them. */ | |
16358 | part_die->name = DW_STRING (&attr); | |
16359 | break; | |
16360 | default: | |
16361 | part_die->name | |
16362 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 16363 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
16364 | break; |
16365 | } | |
c906108c | 16366 | break; |
31ef98ae | 16367 | case DW_AT_linkage_name: |
c906108c | 16368 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
16369 | /* Note that both forms of linkage name might appear. We |
16370 | assume they will be the same, and we only store the last | |
16371 | one we see. */ | |
94af9270 KS |
16372 | if (cu->language == language_ada) |
16373 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 16374 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
16375 | break; |
16376 | case DW_AT_low_pc: | |
16377 | has_low_pc_attr = 1; | |
31aa7e4e | 16378 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
16379 | break; |
16380 | case DW_AT_high_pc: | |
16381 | has_high_pc_attr = 1; | |
31aa7e4e JB |
16382 | part_die->highpc = attr_value_as_address (&attr); |
16383 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
16384 | high_pc_relative = 1; | |
c906108c SS |
16385 | break; |
16386 | case DW_AT_location: | |
0963b4bd | 16387 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
16388 | if (attr_form_is_block (&attr)) |
16389 | { | |
95554aad | 16390 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 16391 | } |
3690dd37 | 16392 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 16393 | { |
4d3c2250 | 16394 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
16395 | } |
16396 | else | |
16397 | { | |
4d3c2250 KB |
16398 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16399 | "partial symbol information"); | |
8e19ed76 | 16400 | } |
c906108c | 16401 | break; |
c906108c SS |
16402 | case DW_AT_external: |
16403 | part_die->is_external = DW_UNSND (&attr); | |
16404 | break; | |
16405 | case DW_AT_declaration: | |
16406 | part_die->is_declaration = DW_UNSND (&attr); | |
16407 | break; | |
16408 | case DW_AT_type: | |
16409 | part_die->has_type = 1; | |
16410 | break; | |
16411 | case DW_AT_abstract_origin: | |
16412 | case DW_AT_specification: | |
72bf9492 DJ |
16413 | case DW_AT_extension: |
16414 | part_die->has_specification = 1; | |
c764a876 | 16415 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16416 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16417 | || cu->per_cu->is_dwz); | |
c906108c SS |
16418 | break; |
16419 | case DW_AT_sibling: | |
16420 | /* Ignore absolute siblings, they might point outside of | |
16421 | the current compile unit. */ | |
16422 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
16423 | complaint (&symfile_complaints, |
16424 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 16425 | else |
b9502d3f | 16426 | { |
9c541725 PA |
16427 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
16428 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
16429 | |
16430 | if (sibling_ptr < info_ptr) | |
16431 | complaint (&symfile_complaints, | |
16432 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
16433 | else if (sibling_ptr > reader->buffer_end) |
16434 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
16435 | else |
16436 | part_die->sibling = sibling_ptr; | |
16437 | } | |
c906108c | 16438 | break; |
fa4028e9 JB |
16439 | case DW_AT_byte_size: |
16440 | part_die->has_byte_size = 1; | |
16441 | break; | |
ff908ebf AW |
16442 | case DW_AT_const_value: |
16443 | part_die->has_const_value = 1; | |
16444 | break; | |
68511cec CES |
16445 | case DW_AT_calling_convention: |
16446 | /* DWARF doesn't provide a way to identify a program's source-level | |
16447 | entry point. DW_AT_calling_convention attributes are only meant | |
16448 | to describe functions' calling conventions. | |
16449 | ||
16450 | However, because it's a necessary piece of information in | |
0c1b455e TT |
16451 | Fortran, and before DWARF 4 DW_CC_program was the only |
16452 | piece of debugging information whose definition refers to | |
16453 | a 'main program' at all, several compilers marked Fortran | |
16454 | main programs with DW_CC_program --- even when those | |
16455 | functions use the standard calling conventions. | |
16456 | ||
16457 | Although DWARF now specifies a way to provide this | |
16458 | information, we support this practice for backward | |
16459 | compatibility. */ | |
68511cec | 16460 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
16461 | && cu->language == language_fortran) |
16462 | part_die->main_subprogram = 1; | |
68511cec | 16463 | break; |
481860b3 GB |
16464 | case DW_AT_inline: |
16465 | if (DW_UNSND (&attr) == DW_INL_inlined | |
16466 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
16467 | part_die->may_be_inlined = 1; | |
16468 | break; | |
95554aad TT |
16469 | |
16470 | case DW_AT_import: | |
16471 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 16472 | { |
9c541725 | 16473 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16474 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16475 | || cu->per_cu->is_dwz); | |
16476 | } | |
95554aad TT |
16477 | break; |
16478 | ||
0c1b455e TT |
16479 | case DW_AT_main_subprogram: |
16480 | part_die->main_subprogram = DW_UNSND (&attr); | |
16481 | break; | |
16482 | ||
c906108c SS |
16483 | default: |
16484 | break; | |
16485 | } | |
16486 | } | |
16487 | ||
91da1414 MW |
16488 | if (high_pc_relative) |
16489 | part_die->highpc += part_die->lowpc; | |
16490 | ||
9373cf26 JK |
16491 | if (has_low_pc_attr && has_high_pc_attr) |
16492 | { | |
16493 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
16494 | eliminate duplicate copies of functions and vtables and such. | |
16495 | The linker will arbitrarily choose one and discard the others. | |
16496 | The AT_*_pc values for such functions refer to local labels in | |
16497 | these sections. If the section from that file was discarded, the | |
16498 | labels are not in the output, so the relocs get a value of 0. | |
16499 | If this is a discarded function, mark the pc bounds as invalid, | |
16500 | so that GDB will ignore it. */ | |
16501 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16502 | { | |
bb5ed363 | 16503 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16504 | |
16505 | complaint (&symfile_complaints, | |
16506 | _("DW_AT_low_pc %s is zero " | |
16507 | "for DIE at 0x%x [in module %s]"), | |
16508 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 16509 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
16510 | } |
16511 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
16512 | else if (part_die->lowpc >= part_die->highpc) | |
16513 | { | |
bb5ed363 | 16514 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16515 | |
16516 | complaint (&symfile_complaints, | |
16517 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
16518 | "for DIE at 0x%x [in module %s]"), | |
16519 | paddress (gdbarch, part_die->lowpc), | |
16520 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
16521 | to_underlying (part_die->sect_off), |
16522 | objfile_name (objfile)); | |
9373cf26 JK |
16523 | } |
16524 | else | |
16525 | part_die->has_pc_info = 1; | |
16526 | } | |
85cbf3d3 | 16527 | |
c906108c SS |
16528 | return info_ptr; |
16529 | } | |
16530 | ||
72bf9492 DJ |
16531 | /* Find a cached partial DIE at OFFSET in CU. */ |
16532 | ||
16533 | static struct partial_die_info * | |
9c541725 | 16534 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
16535 | { |
16536 | struct partial_die_info *lookup_die = NULL; | |
16537 | struct partial_die_info part_die; | |
16538 | ||
9c541725 | 16539 | part_die.sect_off = sect_off; |
9a3c8263 SM |
16540 | lookup_die = ((struct partial_die_info *) |
16541 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 16542 | to_underlying (sect_off))); |
72bf9492 | 16543 | |
72bf9492 DJ |
16544 | return lookup_die; |
16545 | } | |
16546 | ||
348e048f DE |
16547 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16548 | except in the case of .debug_types DIEs which do not reference | |
16549 | outside their CU (they do however referencing other types via | |
55f1336d | 16550 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16551 | |
16552 | static struct partial_die_info * | |
9c541725 | 16553 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16554 | { |
bb5ed363 | 16555 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16556 | struct dwarf2_per_cu_data *per_cu = NULL; |
16557 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16558 | |
36586728 | 16559 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 16560 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 16561 | { |
9c541725 | 16562 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
16563 | if (pd != NULL) |
16564 | return pd; | |
0d99eb77 DE |
16565 | /* We missed recording what we needed. |
16566 | Load all dies and try again. */ | |
16567 | per_cu = cu->per_cu; | |
5afb4e99 | 16568 | } |
0d99eb77 DE |
16569 | else |
16570 | { | |
16571 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16572 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 16573 | { |
9c541725 PA |
16574 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
16575 | " external reference to offset 0x%x [in module %s].\n"), | |
16576 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
16577 | bfd_get_filename (objfile->obfd)); |
16578 | } | |
9c541725 | 16579 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 16580 | objfile); |
72bf9492 | 16581 | |
0d99eb77 DE |
16582 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16583 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16584 | |
0d99eb77 | 16585 | per_cu->cu->last_used = 0; |
9c541725 | 16586 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 16587 | } |
5afb4e99 | 16588 | |
dee91e82 DE |
16589 | /* If we didn't find it, and not all dies have been loaded, |
16590 | load them all and try again. */ | |
16591 | ||
5afb4e99 DJ |
16592 | if (pd == NULL && per_cu->load_all_dies == 0) |
16593 | { | |
5afb4e99 | 16594 | per_cu->load_all_dies = 1; |
fd820528 DE |
16595 | |
16596 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16597 | THIS_CU->cu may already be in use. So we can't just free it and | |
16598 | replace its DIEs with the ones we read in. Instead, we leave those | |
16599 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16600 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16601 | set. */ | |
dee91e82 | 16602 | load_partial_comp_unit (per_cu); |
5afb4e99 | 16603 | |
9c541725 | 16604 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
16605 | } |
16606 | ||
16607 | if (pd == NULL) | |
16608 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16609 | _("could not find partial DIE 0x%x " |
16610 | "in cache [from module %s]\n"), | |
9c541725 | 16611 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16612 | return pd; |
72bf9492 DJ |
16613 | } |
16614 | ||
abc72ce4 DE |
16615 | /* See if we can figure out if the class lives in a namespace. We do |
16616 | this by looking for a member function; its demangled name will | |
16617 | contain namespace info, if there is any. */ | |
16618 | ||
16619 | static void | |
16620 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16621 | struct dwarf2_cu *cu) | |
16622 | { | |
16623 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16624 | what template types look like, because the demangler | |
16625 | frequently doesn't give the same name as the debug info. We | |
16626 | could fix this by only using the demangled name to get the | |
16627 | prefix (but see comment in read_structure_type). */ | |
16628 | ||
16629 | struct partial_die_info *real_pdi; | |
16630 | struct partial_die_info *child_pdi; | |
16631 | ||
16632 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16633 | we should not do this. We'll prepend the parent's fully qualified | |
16634 | name when we create the partial symbol. */ | |
16635 | ||
16636 | real_pdi = struct_pdi; | |
16637 | while (real_pdi->has_specification) | |
36586728 TT |
16638 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16639 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16640 | |
16641 | if (real_pdi->die_parent != NULL) | |
16642 | return; | |
16643 | ||
16644 | for (child_pdi = struct_pdi->die_child; | |
16645 | child_pdi != NULL; | |
16646 | child_pdi = child_pdi->die_sibling) | |
16647 | { | |
16648 | if (child_pdi->tag == DW_TAG_subprogram | |
16649 | && child_pdi->linkage_name != NULL) | |
16650 | { | |
16651 | char *actual_class_name | |
16652 | = language_class_name_from_physname (cu->language_defn, | |
16653 | child_pdi->linkage_name); | |
16654 | if (actual_class_name != NULL) | |
16655 | { | |
16656 | struct_pdi->name | |
224c3ddb SM |
16657 | = ((const char *) |
16658 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16659 | actual_class_name, | |
16660 | strlen (actual_class_name))); | |
abc72ce4 DE |
16661 | xfree (actual_class_name); |
16662 | } | |
16663 | break; | |
16664 | } | |
16665 | } | |
16666 | } | |
16667 | ||
72bf9492 DJ |
16668 | /* Adjust PART_DIE before generating a symbol for it. This function |
16669 | may set the is_external flag or change the DIE's name. */ | |
16670 | ||
16671 | static void | |
16672 | fixup_partial_die (struct partial_die_info *part_die, | |
16673 | struct dwarf2_cu *cu) | |
16674 | { | |
abc72ce4 DE |
16675 | /* Once we've fixed up a die, there's no point in doing so again. |
16676 | This also avoids a memory leak if we were to call | |
16677 | guess_partial_die_structure_name multiple times. */ | |
16678 | if (part_die->fixup_called) | |
16679 | return; | |
16680 | ||
72bf9492 DJ |
16681 | /* If we found a reference attribute and the DIE has no name, try |
16682 | to find a name in the referred to DIE. */ | |
16683 | ||
16684 | if (part_die->name == NULL && part_die->has_specification) | |
16685 | { | |
16686 | struct partial_die_info *spec_die; | |
72bf9492 | 16687 | |
36586728 TT |
16688 | spec_die = find_partial_die (part_die->spec_offset, |
16689 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16690 | |
10b3939b | 16691 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16692 | |
16693 | if (spec_die->name) | |
16694 | { | |
16695 | part_die->name = spec_die->name; | |
16696 | ||
16697 | /* Copy DW_AT_external attribute if it is set. */ | |
16698 | if (spec_die->is_external) | |
16699 | part_die->is_external = spec_die->is_external; | |
16700 | } | |
16701 | } | |
16702 | ||
16703 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16704 | |
16705 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16706 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16707 | |
abc72ce4 DE |
16708 | /* If there is no parent die to provide a namespace, and there are |
16709 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16710 | name. */ |
abc72ce4 | 16711 | if (cu->language == language_cplus |
8b70b953 | 16712 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16713 | && part_die->die_parent == NULL |
16714 | && part_die->has_children | |
16715 | && (part_die->tag == DW_TAG_class_type | |
16716 | || part_die->tag == DW_TAG_structure_type | |
16717 | || part_die->tag == DW_TAG_union_type)) | |
16718 | guess_partial_die_structure_name (part_die, cu); | |
16719 | ||
53832f31 TT |
16720 | /* GCC might emit a nameless struct or union that has a linkage |
16721 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16722 | if (part_die->name == NULL | |
96408a79 SA |
16723 | && (part_die->tag == DW_TAG_class_type |
16724 | || part_die->tag == DW_TAG_interface_type | |
16725 | || part_die->tag == DW_TAG_structure_type | |
16726 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16727 | && part_die->linkage_name != NULL) |
16728 | { | |
16729 | char *demangled; | |
16730 | ||
8de20a37 | 16731 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16732 | if (demangled) |
16733 | { | |
96408a79 SA |
16734 | const char *base; |
16735 | ||
16736 | /* Strip any leading namespaces/classes, keep only the base name. | |
16737 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16738 | base = strrchr (demangled, ':'); | |
16739 | if (base && base > demangled && base[-1] == ':') | |
16740 | base++; | |
16741 | else | |
16742 | base = demangled; | |
16743 | ||
34a68019 | 16744 | part_die->name |
224c3ddb SM |
16745 | = ((const char *) |
16746 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16747 | base, strlen (base))); | |
53832f31 TT |
16748 | xfree (demangled); |
16749 | } | |
16750 | } | |
16751 | ||
abc72ce4 | 16752 | part_die->fixup_called = 1; |
72bf9492 DJ |
16753 | } |
16754 | ||
a8329558 | 16755 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16756 | |
d521ce57 | 16757 | static const gdb_byte * |
dee91e82 DE |
16758 | read_attribute_value (const struct die_reader_specs *reader, |
16759 | struct attribute *attr, unsigned form, | |
43988095 | 16760 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 16761 | { |
dee91e82 | 16762 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16763 | struct objfile *objfile = cu->objfile; |
16764 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16765 | bfd *abfd = reader->abfd; |
e7c27a73 | 16766 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16767 | unsigned int bytes_read; |
16768 | struct dwarf_block *blk; | |
16769 | ||
aead7601 | 16770 | attr->form = (enum dwarf_form) form; |
a8329558 | 16771 | switch (form) |
c906108c | 16772 | { |
c906108c | 16773 | case DW_FORM_ref_addr: |
ae411497 | 16774 | if (cu->header.version == 2) |
4568ecf9 | 16775 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16776 | else |
4568ecf9 DE |
16777 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16778 | &cu->header, &bytes_read); | |
ae411497 TT |
16779 | info_ptr += bytes_read; |
16780 | break; | |
36586728 TT |
16781 | case DW_FORM_GNU_ref_alt: |
16782 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16783 | info_ptr += bytes_read; | |
16784 | break; | |
ae411497 | 16785 | case DW_FORM_addr: |
e7c27a73 | 16786 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16787 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16788 | info_ptr += bytes_read; |
c906108c SS |
16789 | break; |
16790 | case DW_FORM_block2: | |
7b5a2f43 | 16791 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16792 | blk->size = read_2_bytes (abfd, info_ptr); |
16793 | info_ptr += 2; | |
16794 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16795 | info_ptr += blk->size; | |
16796 | DW_BLOCK (attr) = blk; | |
16797 | break; | |
16798 | case DW_FORM_block4: | |
7b5a2f43 | 16799 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16800 | blk->size = read_4_bytes (abfd, info_ptr); |
16801 | info_ptr += 4; | |
16802 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16803 | info_ptr += blk->size; | |
16804 | DW_BLOCK (attr) = blk; | |
16805 | break; | |
16806 | case DW_FORM_data2: | |
16807 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16808 | info_ptr += 2; | |
16809 | break; | |
16810 | case DW_FORM_data4: | |
16811 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16812 | info_ptr += 4; | |
16813 | break; | |
16814 | case DW_FORM_data8: | |
16815 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16816 | info_ptr += 8; | |
16817 | break; | |
0224619f JK |
16818 | case DW_FORM_data16: |
16819 | blk = dwarf_alloc_block (cu); | |
16820 | blk->size = 16; | |
16821 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
16822 | info_ptr += 16; | |
16823 | DW_BLOCK (attr) = blk; | |
16824 | break; | |
2dc7f7b3 TT |
16825 | case DW_FORM_sec_offset: |
16826 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16827 | info_ptr += bytes_read; | |
16828 | break; | |
c906108c | 16829 | case DW_FORM_string: |
9b1c24c8 | 16830 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16831 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16832 | info_ptr += bytes_read; |
16833 | break; | |
4bdf3d34 | 16834 | case DW_FORM_strp: |
36586728 TT |
16835 | if (!cu->per_cu->is_dwz) |
16836 | { | |
16837 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16838 | &bytes_read); | |
16839 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16840 | info_ptr += bytes_read; | |
16841 | break; | |
16842 | } | |
16843 | /* FALLTHROUGH */ | |
43988095 JK |
16844 | case DW_FORM_line_strp: |
16845 | if (!cu->per_cu->is_dwz) | |
16846 | { | |
16847 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
16848 | cu_header, &bytes_read); | |
16849 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16850 | info_ptr += bytes_read; | |
16851 | break; | |
16852 | } | |
16853 | /* FALLTHROUGH */ | |
36586728 TT |
16854 | case DW_FORM_GNU_strp_alt: |
16855 | { | |
16856 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16857 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16858 | &bytes_read); | |
16859 | ||
16860 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16861 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16862 | info_ptr += bytes_read; | |
16863 | } | |
4bdf3d34 | 16864 | break; |
2dc7f7b3 | 16865 | case DW_FORM_exprloc: |
c906108c | 16866 | case DW_FORM_block: |
7b5a2f43 | 16867 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16868 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16869 | info_ptr += bytes_read; | |
16870 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16871 | info_ptr += blk->size; | |
16872 | DW_BLOCK (attr) = blk; | |
16873 | break; | |
16874 | case DW_FORM_block1: | |
7b5a2f43 | 16875 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16876 | blk->size = read_1_byte (abfd, info_ptr); |
16877 | info_ptr += 1; | |
16878 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16879 | info_ptr += blk->size; | |
16880 | DW_BLOCK (attr) = blk; | |
16881 | break; | |
16882 | case DW_FORM_data1: | |
16883 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16884 | info_ptr += 1; | |
16885 | break; | |
16886 | case DW_FORM_flag: | |
16887 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16888 | info_ptr += 1; | |
16889 | break; | |
2dc7f7b3 TT |
16890 | case DW_FORM_flag_present: |
16891 | DW_UNSND (attr) = 1; | |
16892 | break; | |
c906108c SS |
16893 | case DW_FORM_sdata: |
16894 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16895 | info_ptr += bytes_read; | |
16896 | break; | |
16897 | case DW_FORM_udata: | |
16898 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16899 | info_ptr += bytes_read; | |
16900 | break; | |
16901 | case DW_FORM_ref1: | |
9c541725 | 16902 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16903 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
16904 | info_ptr += 1; |
16905 | break; | |
16906 | case DW_FORM_ref2: | |
9c541725 | 16907 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16908 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
16909 | info_ptr += 2; |
16910 | break; | |
16911 | case DW_FORM_ref4: | |
9c541725 | 16912 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16913 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
16914 | info_ptr += 4; |
16915 | break; | |
613e1657 | 16916 | case DW_FORM_ref8: |
9c541725 | 16917 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16918 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
16919 | info_ptr += 8; |
16920 | break; | |
55f1336d | 16921 | case DW_FORM_ref_sig8: |
ac9ec31b | 16922 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16923 | info_ptr += 8; |
16924 | break; | |
c906108c | 16925 | case DW_FORM_ref_udata: |
9c541725 | 16926 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16927 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
16928 | info_ptr += bytes_read; |
16929 | break; | |
c906108c | 16930 | case DW_FORM_indirect: |
a8329558 KW |
16931 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16932 | info_ptr += bytes_read; | |
43988095 JK |
16933 | if (form == DW_FORM_implicit_const) |
16934 | { | |
16935 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16936 | info_ptr += bytes_read; | |
16937 | } | |
16938 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
16939 | info_ptr); | |
16940 | break; | |
16941 | case DW_FORM_implicit_const: | |
16942 | DW_SND (attr) = implicit_const; | |
a8329558 | 16943 | break; |
3019eac3 DE |
16944 | case DW_FORM_GNU_addr_index: |
16945 | if (reader->dwo_file == NULL) | |
16946 | { | |
16947 | /* For now flag a hard error. | |
16948 | Later we can turn this into a complaint. */ | |
16949 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16950 | dwarf_form_name (form), | |
16951 | bfd_get_filename (abfd)); | |
16952 | } | |
16953 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16954 | info_ptr += bytes_read; | |
16955 | break; | |
16956 | case DW_FORM_GNU_str_index: | |
16957 | if (reader->dwo_file == NULL) | |
16958 | { | |
16959 | /* For now flag a hard error. | |
16960 | Later we can turn this into a complaint if warranted. */ | |
16961 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16962 | dwarf_form_name (form), | |
16963 | bfd_get_filename (abfd)); | |
16964 | } | |
16965 | { | |
16966 | ULONGEST str_index = | |
16967 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16968 | ||
342587c4 | 16969 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16970 | DW_STRING_IS_CANONICAL (attr) = 0; |
16971 | info_ptr += bytes_read; | |
16972 | } | |
16973 | break; | |
c906108c | 16974 | default: |
8a3fe4f8 | 16975 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16976 | dwarf_form_name (form), |
16977 | bfd_get_filename (abfd)); | |
c906108c | 16978 | } |
28e94949 | 16979 | |
36586728 | 16980 | /* Super hack. */ |
7771576e | 16981 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16982 | attr->form = DW_FORM_GNU_ref_alt; |
16983 | ||
28e94949 JB |
16984 | /* We have seen instances where the compiler tried to emit a byte |
16985 | size attribute of -1 which ended up being encoded as an unsigned | |
16986 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16987 | an object of this size seems pretty unlikely so we can relatively | |
16988 | safely treat these cases as if the size attribute was invalid and | |
16989 | treat them as zero by default. */ | |
16990 | if (attr->name == DW_AT_byte_size | |
16991 | && form == DW_FORM_data4 | |
16992 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16993 | { |
16994 | complaint | |
16995 | (&symfile_complaints, | |
43bbcdc2 PH |
16996 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16997 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16998 | DW_UNSND (attr) = 0; |
16999 | } | |
28e94949 | 17000 | |
c906108c SS |
17001 | return info_ptr; |
17002 | } | |
17003 | ||
a8329558 KW |
17004 | /* Read an attribute described by an abbreviated attribute. */ |
17005 | ||
d521ce57 | 17006 | static const gdb_byte * |
dee91e82 DE |
17007 | read_attribute (const struct die_reader_specs *reader, |
17008 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17009 | const gdb_byte *info_ptr) |
a8329558 KW |
17010 | { |
17011 | attr->name = abbrev->name; | |
43988095 JK |
17012 | return read_attribute_value (reader, attr, abbrev->form, |
17013 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17014 | } |
17015 | ||
0963b4bd | 17016 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17017 | |
17018 | static unsigned int | |
a1855c1d | 17019 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17020 | { |
fe1b8b76 | 17021 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17022 | } |
17023 | ||
17024 | static int | |
a1855c1d | 17025 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17026 | { |
fe1b8b76 | 17027 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17028 | } |
17029 | ||
17030 | static unsigned int | |
a1855c1d | 17031 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17032 | { |
fe1b8b76 | 17033 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17034 | } |
17035 | ||
21ae7a4d | 17036 | static int |
a1855c1d | 17037 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17038 | { |
17039 | return bfd_get_signed_16 (abfd, buf); | |
17040 | } | |
17041 | ||
c906108c | 17042 | static unsigned int |
a1855c1d | 17043 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17044 | { |
fe1b8b76 | 17045 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17046 | } |
17047 | ||
21ae7a4d | 17048 | static int |
a1855c1d | 17049 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17050 | { |
17051 | return bfd_get_signed_32 (abfd, buf); | |
17052 | } | |
17053 | ||
93311388 | 17054 | static ULONGEST |
a1855c1d | 17055 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17056 | { |
fe1b8b76 | 17057 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17058 | } |
17059 | ||
17060 | static CORE_ADDR | |
d521ce57 | 17061 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17062 | unsigned int *bytes_read) |
c906108c | 17063 | { |
e7c27a73 | 17064 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17065 | CORE_ADDR retval = 0; |
17066 | ||
107d2387 | 17067 | if (cu_header->signed_addr_p) |
c906108c | 17068 | { |
107d2387 AC |
17069 | switch (cu_header->addr_size) |
17070 | { | |
17071 | case 2: | |
fe1b8b76 | 17072 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17073 | break; |
17074 | case 4: | |
fe1b8b76 | 17075 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17076 | break; |
17077 | case 8: | |
fe1b8b76 | 17078 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17079 | break; |
17080 | default: | |
8e65ff28 | 17081 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17082 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17083 | bfd_get_filename (abfd)); |
107d2387 AC |
17084 | } |
17085 | } | |
17086 | else | |
17087 | { | |
17088 | switch (cu_header->addr_size) | |
17089 | { | |
17090 | case 2: | |
fe1b8b76 | 17091 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17092 | break; |
17093 | case 4: | |
fe1b8b76 | 17094 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17095 | break; |
17096 | case 8: | |
fe1b8b76 | 17097 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17098 | break; |
17099 | default: | |
8e65ff28 | 17100 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17101 | _("read_address: bad switch, " |
17102 | "unsigned [in module %s]"), | |
659b0389 | 17103 | bfd_get_filename (abfd)); |
107d2387 | 17104 | } |
c906108c | 17105 | } |
64367e0a | 17106 | |
107d2387 AC |
17107 | *bytes_read = cu_header->addr_size; |
17108 | return retval; | |
c906108c SS |
17109 | } |
17110 | ||
f7ef9339 | 17111 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17112 | specification allows the initial length to take up either 4 bytes |
17113 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17114 | bytes describe the length and all offsets will be 8 bytes in length | |
17115 | instead of 4. | |
17116 | ||
f7ef9339 KB |
17117 | An older, non-standard 64-bit format is also handled by this |
17118 | function. The older format in question stores the initial length | |
17119 | as an 8-byte quantity without an escape value. Lengths greater | |
17120 | than 2^32 aren't very common which means that the initial 4 bytes | |
17121 | is almost always zero. Since a length value of zero doesn't make | |
17122 | sense for the 32-bit format, this initial zero can be considered to | |
17123 | be an escape value which indicates the presence of the older 64-bit | |
17124 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17125 | greater than 4GB. If it becomes necessary to handle lengths |
17126 | somewhat larger than 4GB, we could allow other small values (such | |
17127 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17128 | escape values indicating the presence of the old format. | |
f7ef9339 | 17129 | |
917c78fc MK |
17130 | The value returned via bytes_read should be used to increment the |
17131 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17132 | |
613e1657 KB |
17133 | [ Note: read_initial_length() and read_offset() are based on the |
17134 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17135 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17136 | from: |
17137 | ||
f7ef9339 | 17138 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17139 | |
613e1657 KB |
17140 | This document is only a draft and is subject to change. (So beware.) |
17141 | ||
f7ef9339 | 17142 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17143 | determined empirically by examining 64-bit ELF files produced by |
17144 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17145 | |
17146 | - Kevin, July 16, 2002 | |
613e1657 KB |
17147 | ] */ |
17148 | ||
17149 | static LONGEST | |
d521ce57 | 17150 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17151 | { |
fe1b8b76 | 17152 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17153 | |
dd373385 | 17154 | if (length == 0xffffffff) |
613e1657 | 17155 | { |
fe1b8b76 | 17156 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17157 | *bytes_read = 12; |
613e1657 | 17158 | } |
dd373385 | 17159 | else if (length == 0) |
f7ef9339 | 17160 | { |
dd373385 | 17161 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17162 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17163 | *bytes_read = 8; |
f7ef9339 | 17164 | } |
613e1657 KB |
17165 | else |
17166 | { | |
17167 | *bytes_read = 4; | |
613e1657 KB |
17168 | } |
17169 | ||
c764a876 DE |
17170 | return length; |
17171 | } | |
dd373385 | 17172 | |
c764a876 DE |
17173 | /* Cover function for read_initial_length. |
17174 | Returns the length of the object at BUF, and stores the size of the | |
17175 | initial length in *BYTES_READ and stores the size that offsets will be in | |
17176 | *OFFSET_SIZE. | |
17177 | If the initial length size is not equivalent to that specified in | |
17178 | CU_HEADER then issue a complaint. | |
17179 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 17180 | |
c764a876 | 17181 | static LONGEST |
d521ce57 | 17182 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
17183 | const struct comp_unit_head *cu_header, |
17184 | unsigned int *bytes_read, | |
17185 | unsigned int *offset_size) | |
17186 | { | |
17187 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
17188 | ||
17189 | gdb_assert (cu_header->initial_length_size == 4 | |
17190 | || cu_header->initial_length_size == 8 | |
17191 | || cu_header->initial_length_size == 12); | |
17192 | ||
17193 | if (cu_header->initial_length_size != *bytes_read) | |
17194 | complaint (&symfile_complaints, | |
17195 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 17196 | |
c764a876 | 17197 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 17198 | return length; |
613e1657 KB |
17199 | } |
17200 | ||
17201 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 17202 | given by cu_header->offset_size. */ |
613e1657 KB |
17203 | |
17204 | static LONGEST | |
d521ce57 TT |
17205 | read_offset (bfd *abfd, const gdb_byte *buf, |
17206 | const struct comp_unit_head *cu_header, | |
891d2f0b | 17207 | unsigned int *bytes_read) |
c764a876 DE |
17208 | { |
17209 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 17210 | |
c764a876 DE |
17211 | *bytes_read = cu_header->offset_size; |
17212 | return offset; | |
17213 | } | |
17214 | ||
17215 | /* Read an offset from the data stream. */ | |
17216 | ||
17217 | static LONGEST | |
d521ce57 | 17218 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
17219 | { |
17220 | LONGEST retval = 0; | |
17221 | ||
c764a876 | 17222 | switch (offset_size) |
613e1657 KB |
17223 | { |
17224 | case 4: | |
fe1b8b76 | 17225 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
17226 | break; |
17227 | case 8: | |
fe1b8b76 | 17228 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
17229 | break; |
17230 | default: | |
8e65ff28 | 17231 | internal_error (__FILE__, __LINE__, |
c764a876 | 17232 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 17233 | bfd_get_filename (abfd)); |
613e1657 KB |
17234 | } |
17235 | ||
917c78fc | 17236 | return retval; |
613e1657 KB |
17237 | } |
17238 | ||
d521ce57 TT |
17239 | static const gdb_byte * |
17240 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
17241 | { |
17242 | /* If the size of a host char is 8 bits, we can return a pointer | |
17243 | to the buffer, otherwise we have to copy the data to a buffer | |
17244 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17245 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 17246 | return buf; |
c906108c SS |
17247 | } |
17248 | ||
d521ce57 TT |
17249 | static const char * |
17250 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
17251 | unsigned int *bytes_read_ptr) | |
c906108c SS |
17252 | { |
17253 | /* If the size of a host char is 8 bits, we can return a pointer | |
17254 | to the string, otherwise we have to copy the string to a buffer | |
17255 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17256 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
17257 | if (*buf == '\0') |
17258 | { | |
17259 | *bytes_read_ptr = 1; | |
17260 | return NULL; | |
17261 | } | |
d521ce57 TT |
17262 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
17263 | return (const char *) buf; | |
4bdf3d34 JJ |
17264 | } |
17265 | ||
43988095 JK |
17266 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
17267 | reporting strings FORM_NAME and SECT_NAME. */ | |
17268 | ||
d521ce57 | 17269 | static const char * |
43988095 JK |
17270 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
17271 | struct dwarf2_section_info *sect, | |
17272 | const char *form_name, | |
17273 | const char *sect_name) | |
17274 | { | |
17275 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
17276 | if (sect->buffer == NULL) | |
17277 | error (_("%s used without %s section [in module %s]"), | |
17278 | form_name, sect_name, bfd_get_filename (abfd)); | |
17279 | if (str_offset >= sect->size) | |
17280 | error (_("%s pointing outside of %s section [in module %s]"), | |
17281 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 17282 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 17283 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 17284 | return NULL; |
43988095 JK |
17285 | return (const char *) (sect->buffer + str_offset); |
17286 | } | |
17287 | ||
17288 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
17289 | ||
17290 | static const char * | |
17291 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17292 | { | |
17293 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17294 | &dwarf2_per_objfile->str, | |
17295 | "DW_FORM_strp", ".debug_str"); | |
17296 | } | |
17297 | ||
17298 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
17299 | ||
17300 | static const char * | |
17301 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17302 | { | |
17303 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17304 | &dwarf2_per_objfile->line_str, | |
17305 | "DW_FORM_line_strp", | |
17306 | ".debug_line_str"); | |
c906108c SS |
17307 | } |
17308 | ||
36586728 TT |
17309 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
17310 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
17311 | the string consists of a single NUL byte, return NULL; otherwise | |
17312 | return a pointer to the string. */ | |
17313 | ||
d521ce57 | 17314 | static const char * |
36586728 TT |
17315 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
17316 | { | |
17317 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
17318 | ||
17319 | if (dwz->str.buffer == NULL) | |
17320 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
17321 | "section [in module %s]"), | |
17322 | bfd_get_filename (dwz->dwz_bfd)); | |
17323 | if (str_offset >= dwz->str.size) | |
17324 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
17325 | ".debug_str section [in module %s]"), | |
17326 | bfd_get_filename (dwz->dwz_bfd)); | |
17327 | gdb_assert (HOST_CHAR_BIT == 8); | |
17328 | if (dwz->str.buffer[str_offset] == '\0') | |
17329 | return NULL; | |
d521ce57 | 17330 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
17331 | } |
17332 | ||
43988095 JK |
17333 | /* Return pointer to string at .debug_str offset as read from BUF. |
17334 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17335 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17336 | ||
d521ce57 TT |
17337 | static const char * |
17338 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
17339 | const struct comp_unit_head *cu_header, |
17340 | unsigned int *bytes_read_ptr) | |
17341 | { | |
17342 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17343 | ||
17344 | return read_indirect_string_at_offset (abfd, str_offset); | |
17345 | } | |
17346 | ||
43988095 JK |
17347 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
17348 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17349 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17350 | ||
17351 | static const char * | |
17352 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
17353 | const struct comp_unit_head *cu_header, | |
17354 | unsigned int *bytes_read_ptr) | |
17355 | { | |
17356 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17357 | ||
17358 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
17359 | } | |
17360 | ||
17361 | ULONGEST | |
d521ce57 | 17362 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 17363 | unsigned int *bytes_read_ptr) |
c906108c | 17364 | { |
12df843f | 17365 | ULONGEST result; |
ce5d95e1 | 17366 | unsigned int num_read; |
870f88f7 | 17367 | int shift; |
c906108c SS |
17368 | unsigned char byte; |
17369 | ||
17370 | result = 0; | |
17371 | shift = 0; | |
17372 | num_read = 0; | |
c906108c SS |
17373 | while (1) |
17374 | { | |
fe1b8b76 | 17375 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17376 | buf++; |
17377 | num_read++; | |
12df843f | 17378 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
17379 | if ((byte & 128) == 0) |
17380 | { | |
17381 | break; | |
17382 | } | |
17383 | shift += 7; | |
17384 | } | |
17385 | *bytes_read_ptr = num_read; | |
17386 | return result; | |
17387 | } | |
17388 | ||
12df843f | 17389 | static LONGEST |
d521ce57 TT |
17390 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
17391 | unsigned int *bytes_read_ptr) | |
c906108c | 17392 | { |
12df843f | 17393 | LONGEST result; |
870f88f7 | 17394 | int shift, num_read; |
c906108c SS |
17395 | unsigned char byte; |
17396 | ||
17397 | result = 0; | |
17398 | shift = 0; | |
c906108c | 17399 | num_read = 0; |
c906108c SS |
17400 | while (1) |
17401 | { | |
fe1b8b76 | 17402 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17403 | buf++; |
17404 | num_read++; | |
12df843f | 17405 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
17406 | shift += 7; |
17407 | if ((byte & 128) == 0) | |
17408 | { | |
17409 | break; | |
17410 | } | |
17411 | } | |
77e0b926 | 17412 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 17413 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
17414 | *bytes_read_ptr = num_read; |
17415 | return result; | |
17416 | } | |
17417 | ||
3019eac3 DE |
17418 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
17419 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
17420 | ADDR_SIZE is the size of addresses from the CU header. */ | |
17421 | ||
17422 | static CORE_ADDR | |
17423 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
17424 | { | |
17425 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17426 | bfd *abfd = objfile->obfd; | |
17427 | const gdb_byte *info_ptr; | |
17428 | ||
17429 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
17430 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
17431 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 17432 | objfile_name (objfile)); |
3019eac3 DE |
17433 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
17434 | error (_("DW_FORM_addr_index pointing outside of " | |
17435 | ".debug_addr section [in module %s]"), | |
4262abfb | 17436 | objfile_name (objfile)); |
3019eac3 DE |
17437 | info_ptr = (dwarf2_per_objfile->addr.buffer |
17438 | + addr_base + addr_index * addr_size); | |
17439 | if (addr_size == 4) | |
17440 | return bfd_get_32 (abfd, info_ptr); | |
17441 | else | |
17442 | return bfd_get_64 (abfd, info_ptr); | |
17443 | } | |
17444 | ||
17445 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
17446 | ||
17447 | static CORE_ADDR | |
17448 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
17449 | { | |
17450 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
17451 | } | |
17452 | ||
17453 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
17454 | ||
17455 | static CORE_ADDR | |
d521ce57 | 17456 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
17457 | unsigned int *bytes_read) |
17458 | { | |
17459 | bfd *abfd = cu->objfile->obfd; | |
17460 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
17461 | ||
17462 | return read_addr_index (cu, addr_index); | |
17463 | } | |
17464 | ||
17465 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
17466 | back to dwarf2_read_addr_index. */ | |
17467 | ||
17468 | struct dwarf2_read_addr_index_data | |
17469 | { | |
17470 | ULONGEST addr_base; | |
17471 | int addr_size; | |
17472 | }; | |
17473 | ||
17474 | /* die_reader_func for dwarf2_read_addr_index. */ | |
17475 | ||
17476 | static void | |
17477 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 17478 | const gdb_byte *info_ptr, |
3019eac3 DE |
17479 | struct die_info *comp_unit_die, |
17480 | int has_children, | |
17481 | void *data) | |
17482 | { | |
17483 | struct dwarf2_cu *cu = reader->cu; | |
17484 | struct dwarf2_read_addr_index_data *aidata = | |
17485 | (struct dwarf2_read_addr_index_data *) data; | |
17486 | ||
17487 | aidata->addr_base = cu->addr_base; | |
17488 | aidata->addr_size = cu->header.addr_size; | |
17489 | } | |
17490 | ||
17491 | /* Given an index in .debug_addr, fetch the value. | |
17492 | NOTE: This can be called during dwarf expression evaluation, | |
17493 | long after the debug information has been read, and thus per_cu->cu | |
17494 | may no longer exist. */ | |
17495 | ||
17496 | CORE_ADDR | |
17497 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
17498 | unsigned int addr_index) | |
17499 | { | |
17500 | struct objfile *objfile = per_cu->objfile; | |
17501 | struct dwarf2_cu *cu = per_cu->cu; | |
17502 | ULONGEST addr_base; | |
17503 | int addr_size; | |
17504 | ||
17505 | /* This is intended to be called from outside this file. */ | |
17506 | dw2_setup (objfile); | |
17507 | ||
17508 | /* We need addr_base and addr_size. | |
17509 | If we don't have PER_CU->cu, we have to get it. | |
17510 | Nasty, but the alternative is storing the needed info in PER_CU, | |
17511 | which at this point doesn't seem justified: it's not clear how frequently | |
17512 | it would get used and it would increase the size of every PER_CU. | |
17513 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
17514 | so we're not in uncharted territory here. | |
17515 | Alas we need to be a bit more complicated as addr_base is contained | |
17516 | in the DIE. | |
17517 | ||
17518 | We don't need to read the entire CU(/TU). | |
17519 | We just need the header and top level die. | |
a1b64ce1 | 17520 | |
3019eac3 | 17521 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 17522 | For now we skip this optimization. */ |
3019eac3 DE |
17523 | |
17524 | if (cu != NULL) | |
17525 | { | |
17526 | addr_base = cu->addr_base; | |
17527 | addr_size = cu->header.addr_size; | |
17528 | } | |
17529 | else | |
17530 | { | |
17531 | struct dwarf2_read_addr_index_data aidata; | |
17532 | ||
a1b64ce1 DE |
17533 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
17534 | we need addr_base. */ | |
17535 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
17536 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
17537 | addr_base = aidata.addr_base; |
17538 | addr_size = aidata.addr_size; | |
17539 | } | |
17540 | ||
17541 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
17542 | } | |
17543 | ||
57d63ce2 DE |
17544 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
17545 | This is only used by the Fission support. */ | |
3019eac3 | 17546 | |
d521ce57 | 17547 | static const char * |
342587c4 | 17548 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
17549 | { |
17550 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 17551 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 17552 | bfd *abfd = objfile->obfd; |
342587c4 | 17553 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
17554 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
17555 | struct dwarf2_section_info *str_offsets_section = | |
17556 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 17557 | const gdb_byte *info_ptr; |
3019eac3 | 17558 | ULONGEST str_offset; |
57d63ce2 | 17559 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 17560 | |
73869dc2 DE |
17561 | dwarf2_read_section (objfile, str_section); |
17562 | dwarf2_read_section (objfile, str_offsets_section); | |
17563 | if (str_section->buffer == NULL) | |
57d63ce2 | 17564 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
17565 | " in CU at offset 0x%x [in module %s]"), |
17566 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17567 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 17568 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
17569 | " in CU at offset 0x%x [in module %s]"), |
17570 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17571 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 17572 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
17573 | " section in CU at offset 0x%x [in module %s]"), |
17574 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17575 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
17576 | + str_index * cu->header.offset_size); |
17577 | if (cu->header.offset_size == 4) | |
17578 | str_offset = bfd_get_32 (abfd, info_ptr); | |
17579 | else | |
17580 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 17581 | if (str_offset >= str_section->size) |
57d63ce2 | 17582 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
17583 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
17584 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17585 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
17586 | } |
17587 | ||
3019eac3 DE |
17588 | /* Return the length of an LEB128 number in BUF. */ |
17589 | ||
17590 | static int | |
17591 | leb128_size (const gdb_byte *buf) | |
17592 | { | |
17593 | const gdb_byte *begin = buf; | |
17594 | gdb_byte byte; | |
17595 | ||
17596 | while (1) | |
17597 | { | |
17598 | byte = *buf++; | |
17599 | if ((byte & 128) == 0) | |
17600 | return buf - begin; | |
17601 | } | |
17602 | } | |
17603 | ||
c906108c | 17604 | static void |
e142c38c | 17605 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17606 | { |
17607 | switch (lang) | |
17608 | { | |
17609 | case DW_LANG_C89: | |
76bee0cc | 17610 | case DW_LANG_C99: |
0cfd832f | 17611 | case DW_LANG_C11: |
c906108c | 17612 | case DW_LANG_C: |
d1be3247 | 17613 | case DW_LANG_UPC: |
e142c38c | 17614 | cu->language = language_c; |
c906108c | 17615 | break; |
9c37b5ae | 17616 | case DW_LANG_Java: |
c906108c | 17617 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
17618 | case DW_LANG_C_plus_plus_11: |
17619 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17620 | cu->language = language_cplus; |
c906108c | 17621 | break; |
6aecb9c2 JB |
17622 | case DW_LANG_D: |
17623 | cu->language = language_d; | |
17624 | break; | |
c906108c SS |
17625 | case DW_LANG_Fortran77: |
17626 | case DW_LANG_Fortran90: | |
b21b22e0 | 17627 | case DW_LANG_Fortran95: |
f7de9aab MW |
17628 | case DW_LANG_Fortran03: |
17629 | case DW_LANG_Fortran08: | |
e142c38c | 17630 | cu->language = language_fortran; |
c906108c | 17631 | break; |
a766d390 DE |
17632 | case DW_LANG_Go: |
17633 | cu->language = language_go; | |
17634 | break; | |
c906108c | 17635 | case DW_LANG_Mips_Assembler: |
e142c38c | 17636 | cu->language = language_asm; |
c906108c SS |
17637 | break; |
17638 | case DW_LANG_Ada83: | |
8aaf0b47 | 17639 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17640 | cu->language = language_ada; |
17641 | break; | |
72019c9c GM |
17642 | case DW_LANG_Modula2: |
17643 | cu->language = language_m2; | |
17644 | break; | |
fe8e67fd PM |
17645 | case DW_LANG_Pascal83: |
17646 | cu->language = language_pascal; | |
17647 | break; | |
22566fbd DJ |
17648 | case DW_LANG_ObjC: |
17649 | cu->language = language_objc; | |
17650 | break; | |
c44af4eb TT |
17651 | case DW_LANG_Rust: |
17652 | case DW_LANG_Rust_old: | |
17653 | cu->language = language_rust; | |
17654 | break; | |
c906108c SS |
17655 | case DW_LANG_Cobol74: |
17656 | case DW_LANG_Cobol85: | |
c906108c | 17657 | default: |
e142c38c | 17658 | cu->language = language_minimal; |
c906108c SS |
17659 | break; |
17660 | } | |
e142c38c | 17661 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17662 | } |
17663 | ||
17664 | /* Return the named attribute or NULL if not there. */ | |
17665 | ||
17666 | static struct attribute * | |
e142c38c | 17667 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17668 | { |
a48e046c | 17669 | for (;;) |
c906108c | 17670 | { |
a48e046c TT |
17671 | unsigned int i; |
17672 | struct attribute *spec = NULL; | |
17673 | ||
17674 | for (i = 0; i < die->num_attrs; ++i) | |
17675 | { | |
17676 | if (die->attrs[i].name == name) | |
17677 | return &die->attrs[i]; | |
17678 | if (die->attrs[i].name == DW_AT_specification | |
17679 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17680 | spec = &die->attrs[i]; | |
17681 | } | |
17682 | ||
17683 | if (!spec) | |
17684 | break; | |
c906108c | 17685 | |
f2f0e013 | 17686 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17687 | } |
c5aa993b | 17688 | |
c906108c SS |
17689 | return NULL; |
17690 | } | |
17691 | ||
348e048f DE |
17692 | /* Return the named attribute or NULL if not there, |
17693 | but do not follow DW_AT_specification, etc. | |
17694 | This is for use in contexts where we're reading .debug_types dies. | |
17695 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17696 | back up the chain, and we want to go down. */ | |
17697 | ||
17698 | static struct attribute * | |
45e58e77 | 17699 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17700 | { |
17701 | unsigned int i; | |
17702 | ||
17703 | for (i = 0; i < die->num_attrs; ++i) | |
17704 | if (die->attrs[i].name == name) | |
17705 | return &die->attrs[i]; | |
17706 | ||
17707 | return NULL; | |
17708 | } | |
17709 | ||
7d45c7c3 KB |
17710 | /* Return the string associated with a string-typed attribute, or NULL if it |
17711 | is either not found or is of an incorrect type. */ | |
17712 | ||
17713 | static const char * | |
17714 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17715 | { | |
17716 | struct attribute *attr; | |
17717 | const char *str = NULL; | |
17718 | ||
17719 | attr = dwarf2_attr (die, name, cu); | |
17720 | ||
17721 | if (attr != NULL) | |
17722 | { | |
43988095 | 17723 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
17724 | || attr->form == DW_FORM_string |
17725 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 17726 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
17727 | str = DW_STRING (attr); |
17728 | else | |
17729 | complaint (&symfile_complaints, | |
17730 | _("string type expected for attribute %s for " | |
17731 | "DIE at 0x%x in module %s"), | |
9c541725 | 17732 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
17733 | objfile_name (cu->objfile)); |
17734 | } | |
17735 | ||
17736 | return str; | |
17737 | } | |
17738 | ||
05cf31d1 JB |
17739 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17740 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17741 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17742 | |
17743 | static int | |
17744 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17745 | { | |
17746 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17747 | ||
17748 | return (attr && DW_UNSND (attr)); | |
17749 | } | |
17750 | ||
3ca72b44 | 17751 | static int |
e142c38c | 17752 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17753 | { |
05cf31d1 JB |
17754 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17755 | which value is non-zero. However, we have to be careful with | |
17756 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17757 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17758 | end up accidently finding a declaration attribute that belongs | |
17759 | to a different DIE referenced by the specification attribute, | |
17760 | even though the given DIE does not have a declaration attribute. */ | |
17761 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17762 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17763 | } |
17764 | ||
63d06c5c | 17765 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17766 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17767 | containing the return value on output. If there is no |
17768 | specification, but there is an abstract origin, that is | |
17769 | returned. */ | |
63d06c5c DC |
17770 | |
17771 | static struct die_info * | |
f2f0e013 | 17772 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17773 | { |
f2f0e013 DJ |
17774 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17775 | *spec_cu); | |
63d06c5c | 17776 | |
edb3359d DJ |
17777 | if (spec_attr == NULL) |
17778 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17779 | ||
63d06c5c DC |
17780 | if (spec_attr == NULL) |
17781 | return NULL; | |
17782 | else | |
f2f0e013 | 17783 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17784 | } |
c906108c | 17785 | |
527f3840 JK |
17786 | /* Stub for free_line_header to match void * callback types. */ |
17787 | ||
17788 | static void | |
17789 | free_line_header_voidp (void *arg) | |
17790 | { | |
9a3c8263 | 17791 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 17792 | |
fff8551c | 17793 | delete lh; |
527f3840 JK |
17794 | } |
17795 | ||
fff8551c PA |
17796 | void |
17797 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 17798 | { |
27e0867f | 17799 | if (dwarf_line_debug >= 2) |
fff8551c PA |
17800 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
17801 | include_dirs.size () + 1, include_dir); | |
27e0867f | 17802 | |
fff8551c | 17803 | include_dirs.push_back (include_dir); |
debd256d | 17804 | } |
6e70227d | 17805 | |
fff8551c PA |
17806 | void |
17807 | line_header::add_file_name (const char *name, | |
ecfb656c | 17808 | dir_index d_index, |
fff8551c PA |
17809 | unsigned int mod_time, |
17810 | unsigned int length) | |
debd256d | 17811 | { |
27e0867f DE |
17812 | if (dwarf_line_debug >= 2) |
17813 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 17814 | (unsigned) file_names.size () + 1, name); |
27e0867f | 17815 | |
ecfb656c | 17816 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 17817 | } |
6e70227d | 17818 | |
83769d0b | 17819 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17820 | |
17821 | static struct dwarf2_section_info * | |
17822 | get_debug_line_section (struct dwarf2_cu *cu) | |
17823 | { | |
17824 | struct dwarf2_section_info *section; | |
17825 | ||
17826 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17827 | DWO file. */ | |
17828 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17829 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17830 | else if (cu->per_cu->is_dwz) | |
17831 | { | |
17832 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17833 | ||
17834 | section = &dwz->line; | |
17835 | } | |
17836 | else | |
17837 | section = &dwarf2_per_objfile->line; | |
17838 | ||
17839 | return section; | |
17840 | } | |
17841 | ||
43988095 JK |
17842 | /* Read directory or file name entry format, starting with byte of |
17843 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
17844 | entries count and the entries themselves in the described entry | |
17845 | format. */ | |
17846 | ||
17847 | static void | |
17848 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
17849 | struct line_header *lh, | |
17850 | const struct comp_unit_head *cu_header, | |
17851 | void (*callback) (struct line_header *lh, | |
17852 | const char *name, | |
ecfb656c | 17853 | dir_index d_index, |
43988095 JK |
17854 | unsigned int mod_time, |
17855 | unsigned int length)) | |
17856 | { | |
17857 | gdb_byte format_count, formati; | |
17858 | ULONGEST data_count, datai; | |
17859 | const gdb_byte *buf = *bufp; | |
17860 | const gdb_byte *format_header_data; | |
17861 | int i; | |
17862 | unsigned int bytes_read; | |
17863 | ||
17864 | format_count = read_1_byte (abfd, buf); | |
17865 | buf += 1; | |
17866 | format_header_data = buf; | |
17867 | for (formati = 0; formati < format_count; formati++) | |
17868 | { | |
17869 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17870 | buf += bytes_read; | |
17871 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17872 | buf += bytes_read; | |
17873 | } | |
17874 | ||
17875 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17876 | buf += bytes_read; | |
17877 | for (datai = 0; datai < data_count; datai++) | |
17878 | { | |
17879 | const gdb_byte *format = format_header_data; | |
17880 | struct file_entry fe; | |
17881 | ||
43988095 JK |
17882 | for (formati = 0; formati < format_count; formati++) |
17883 | { | |
ecfb656c | 17884 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17885 | format += bytes_read; |
43988095 | 17886 | |
ecfb656c | 17887 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17888 | format += bytes_read; |
ecfb656c PA |
17889 | |
17890 | gdb::optional<const char *> string; | |
17891 | gdb::optional<unsigned int> uint; | |
17892 | ||
43988095 JK |
17893 | switch (form) |
17894 | { | |
17895 | case DW_FORM_string: | |
ecfb656c | 17896 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
17897 | buf += bytes_read; |
17898 | break; | |
17899 | ||
17900 | case DW_FORM_line_strp: | |
ecfb656c PA |
17901 | string.emplace (read_indirect_line_string (abfd, buf, |
17902 | cu_header, | |
17903 | &bytes_read)); | |
43988095 JK |
17904 | buf += bytes_read; |
17905 | break; | |
17906 | ||
17907 | case DW_FORM_data1: | |
ecfb656c | 17908 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
17909 | buf += 1; |
17910 | break; | |
17911 | ||
17912 | case DW_FORM_data2: | |
ecfb656c | 17913 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
17914 | buf += 2; |
17915 | break; | |
17916 | ||
17917 | case DW_FORM_data4: | |
ecfb656c | 17918 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
17919 | buf += 4; |
17920 | break; | |
17921 | ||
17922 | case DW_FORM_data8: | |
ecfb656c | 17923 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
17924 | buf += 8; |
17925 | break; | |
17926 | ||
17927 | case DW_FORM_udata: | |
ecfb656c | 17928 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
17929 | buf += bytes_read; |
17930 | break; | |
17931 | ||
17932 | case DW_FORM_block: | |
17933 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
17934 | current GDB. */ | |
17935 | break; | |
17936 | } | |
ecfb656c PA |
17937 | |
17938 | switch (content_type) | |
17939 | { | |
17940 | case DW_LNCT_path: | |
17941 | if (string.has_value ()) | |
17942 | fe.name = *string; | |
17943 | break; | |
17944 | case DW_LNCT_directory_index: | |
17945 | if (uint.has_value ()) | |
17946 | fe.d_index = (dir_index) *uint; | |
17947 | break; | |
17948 | case DW_LNCT_timestamp: | |
17949 | if (uint.has_value ()) | |
17950 | fe.mod_time = *uint; | |
17951 | break; | |
17952 | case DW_LNCT_size: | |
17953 | if (uint.has_value ()) | |
17954 | fe.length = *uint; | |
17955 | break; | |
17956 | case DW_LNCT_MD5: | |
17957 | break; | |
17958 | default: | |
17959 | complaint (&symfile_complaints, | |
17960 | _("Unknown format content type %s"), | |
17961 | pulongest (content_type)); | |
17962 | } | |
43988095 JK |
17963 | } |
17964 | ||
ecfb656c | 17965 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
17966 | } |
17967 | ||
17968 | *bufp = buf; | |
17969 | } | |
17970 | ||
debd256d | 17971 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17972 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17973 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17974 | Returns NULL if there is a problem reading the header, e.g., if it |
17975 | has a version we don't understand. | |
debd256d JB |
17976 | |
17977 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17978 | the returned object point into the dwarf line section buffer, |
17979 | and must not be freed. */ | |
ae2de4f8 | 17980 | |
fff8551c | 17981 | static line_header_up |
9c541725 | 17982 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 17983 | { |
d521ce57 | 17984 | const gdb_byte *line_ptr; |
c764a876 | 17985 | unsigned int bytes_read, offset_size; |
debd256d | 17986 | int i; |
d521ce57 | 17987 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17988 | struct dwarf2_section_info *section; |
17989 | bfd *abfd; | |
17990 | ||
36586728 | 17991 | section = get_debug_line_section (cu); |
3019eac3 DE |
17992 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17993 | if (section->buffer == NULL) | |
debd256d | 17994 | { |
3019eac3 DE |
17995 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17996 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
17997 | else | |
17998 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
17999 | return 0; |
18000 | } | |
18001 | ||
fceca515 DE |
18002 | /* We can't do this until we know the section is non-empty. |
18003 | Only then do we know we have such a section. */ | |
a32a8923 | 18004 | abfd = get_section_bfd_owner (section); |
fceca515 | 18005 | |
a738430d MK |
18006 | /* Make sure that at least there's room for the total_length field. |
18007 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18008 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18009 | { |
4d3c2250 | 18010 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18011 | return 0; |
18012 | } | |
18013 | ||
fff8551c | 18014 | line_header_up lh (new line_header ()); |
debd256d | 18015 | |
9c541725 | 18016 | lh->sect_off = sect_off; |
527f3840 JK |
18017 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18018 | ||
9c541725 | 18019 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18020 | |
a738430d | 18021 | /* Read in the header. */ |
6e70227d | 18022 | lh->total_length = |
c764a876 DE |
18023 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18024 | &bytes_read, &offset_size); | |
debd256d | 18025 | line_ptr += bytes_read; |
3019eac3 | 18026 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18027 | { |
4d3c2250 | 18028 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18029 | return 0; |
18030 | } | |
18031 | lh->statement_program_end = line_ptr + lh->total_length; | |
18032 | lh->version = read_2_bytes (abfd, line_ptr); | |
18033 | line_ptr += 2; | |
43988095 | 18034 | if (lh->version > 5) |
cd366ee8 DE |
18035 | { |
18036 | /* This is a version we don't understand. The format could have | |
18037 | changed in ways we don't handle properly so just punt. */ | |
18038 | complaint (&symfile_complaints, | |
18039 | _("unsupported version in .debug_line section")); | |
18040 | return NULL; | |
18041 | } | |
43988095 JK |
18042 | if (lh->version >= 5) |
18043 | { | |
18044 | gdb_byte segment_selector_size; | |
18045 | ||
18046 | /* Skip address size. */ | |
18047 | read_1_byte (abfd, line_ptr); | |
18048 | line_ptr += 1; | |
18049 | ||
18050 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18051 | line_ptr += 1; | |
18052 | if (segment_selector_size != 0) | |
18053 | { | |
18054 | complaint (&symfile_complaints, | |
18055 | _("unsupported segment selector size %u " | |
18056 | "in .debug_line section"), | |
18057 | segment_selector_size); | |
18058 | return NULL; | |
18059 | } | |
18060 | } | |
c764a876 DE |
18061 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18062 | line_ptr += offset_size; | |
debd256d JB |
18063 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18064 | line_ptr += 1; | |
2dc7f7b3 TT |
18065 | if (lh->version >= 4) |
18066 | { | |
18067 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18068 | line_ptr += 1; | |
18069 | } | |
18070 | else | |
18071 | lh->maximum_ops_per_instruction = 1; | |
18072 | ||
18073 | if (lh->maximum_ops_per_instruction == 0) | |
18074 | { | |
18075 | lh->maximum_ops_per_instruction = 1; | |
18076 | complaint (&symfile_complaints, | |
3e43a32a MS |
18077 | _("invalid maximum_ops_per_instruction " |
18078 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18079 | } |
18080 | ||
debd256d JB |
18081 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18082 | line_ptr += 1; | |
18083 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18084 | line_ptr += 1; | |
18085 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18086 | line_ptr += 1; | |
18087 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18088 | line_ptr += 1; | |
fff8551c | 18089 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18090 | |
18091 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18092 | for (i = 1; i < lh->opcode_base; ++i) | |
18093 | { | |
18094 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18095 | line_ptr += 1; | |
18096 | } | |
18097 | ||
43988095 | 18098 | if (lh->version >= 5) |
debd256d | 18099 | { |
43988095 | 18100 | /* Read directory table. */ |
fff8551c PA |
18101 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18102 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18103 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18104 | unsigned int length) |
18105 | { | |
18106 | lh->add_include_dir (name); | |
18107 | }); | |
debd256d | 18108 | |
43988095 | 18109 | /* Read file name table. */ |
fff8551c PA |
18110 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18111 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18112 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18113 | unsigned int length) |
18114 | { | |
ecfb656c | 18115 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18116 | }); |
43988095 JK |
18117 | } |
18118 | else | |
debd256d | 18119 | { |
43988095 JK |
18120 | /* Read directory table. */ |
18121 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18122 | { | |
18123 | line_ptr += bytes_read; | |
fff8551c | 18124 | lh->add_include_dir (cur_dir); |
43988095 | 18125 | } |
debd256d JB |
18126 | line_ptr += bytes_read; |
18127 | ||
43988095 JK |
18128 | /* Read file name table. */ |
18129 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18130 | { | |
ecfb656c PA |
18131 | unsigned int mod_time, length; |
18132 | dir_index d_index; | |
43988095 JK |
18133 | |
18134 | line_ptr += bytes_read; | |
ecfb656c | 18135 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18136 | line_ptr += bytes_read; |
18137 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18138 | line_ptr += bytes_read; | |
18139 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18140 | line_ptr += bytes_read; | |
18141 | ||
ecfb656c | 18142 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18143 | } |
18144 | line_ptr += bytes_read; | |
debd256d | 18145 | } |
6e70227d | 18146 | lh->statement_program_start = line_ptr; |
debd256d | 18147 | |
3019eac3 | 18148 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18149 | complaint (&symfile_complaints, |
3e43a32a MS |
18150 | _("line number info header doesn't " |
18151 | "fit in `.debug_line' section")); | |
debd256d | 18152 | |
debd256d JB |
18153 | return lh; |
18154 | } | |
c906108c | 18155 | |
c6da4cef DE |
18156 | /* Subroutine of dwarf_decode_lines to simplify it. |
18157 | Return the file name of the psymtab for included file FILE_INDEX | |
18158 | in line header LH of PST. | |
18159 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18160 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18161 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18162 | ||
18163 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18164 | |
d521ce57 | 18165 | static const char * |
c6da4cef DE |
18166 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18167 | const struct partial_symtab *pst, | |
18168 | const char *comp_dir) | |
18169 | { | |
8c43009f | 18170 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18171 | const char *include_name = fe.name; |
18172 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18173 | const char *pst_filename; |
18174 | char *copied_name = NULL; | |
c6da4cef DE |
18175 | int file_is_pst; |
18176 | ||
8c43009f | 18177 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
18178 | |
18179 | if (!IS_ABSOLUTE_PATH (include_name) | |
18180 | && (dir_name != NULL || comp_dir != NULL)) | |
18181 | { | |
18182 | /* Avoid creating a duplicate psymtab for PST. | |
18183 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
18184 | Before we do the comparison, however, we need to account | |
18185 | for DIR_NAME and COMP_DIR. | |
18186 | First prepend dir_name (if non-NULL). If we still don't | |
18187 | have an absolute path prepend comp_dir (if non-NULL). | |
18188 | However, the directory we record in the include-file's | |
18189 | psymtab does not contain COMP_DIR (to match the | |
18190 | corresponding symtab(s)). | |
18191 | ||
18192 | Example: | |
18193 | ||
18194 | bash$ cd /tmp | |
18195 | bash$ gcc -g ./hello.c | |
18196 | include_name = "hello.c" | |
18197 | dir_name = "." | |
18198 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
18199 | DW_AT_name = "./hello.c" |
18200 | ||
18201 | */ | |
c6da4cef DE |
18202 | |
18203 | if (dir_name != NULL) | |
18204 | { | |
d521ce57 TT |
18205 | char *tem = concat (dir_name, SLASH_STRING, |
18206 | include_name, (char *)NULL); | |
18207 | ||
18208 | make_cleanup (xfree, tem); | |
18209 | include_name = tem; | |
c6da4cef | 18210 | include_name_to_compare = include_name; |
c6da4cef DE |
18211 | } |
18212 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
18213 | { | |
d521ce57 TT |
18214 | char *tem = concat (comp_dir, SLASH_STRING, |
18215 | include_name, (char *)NULL); | |
18216 | ||
18217 | make_cleanup (xfree, tem); | |
18218 | include_name_to_compare = tem; | |
c6da4cef DE |
18219 | } |
18220 | } | |
18221 | ||
18222 | pst_filename = pst->filename; | |
18223 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
18224 | { | |
72b9f47f TT |
18225 | copied_name = concat (pst->dirname, SLASH_STRING, |
18226 | pst_filename, (char *)NULL); | |
18227 | pst_filename = copied_name; | |
c6da4cef DE |
18228 | } |
18229 | ||
1e3fad37 | 18230 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 18231 | |
72b9f47f TT |
18232 | if (copied_name != NULL) |
18233 | xfree (copied_name); | |
c6da4cef DE |
18234 | |
18235 | if (file_is_pst) | |
18236 | return NULL; | |
18237 | return include_name; | |
18238 | } | |
18239 | ||
d9b3de22 DE |
18240 | /* State machine to track the state of the line number program. */ |
18241 | ||
6f77053d | 18242 | class lnp_state_machine |
d9b3de22 | 18243 | { |
6f77053d PA |
18244 | public: |
18245 | /* Initialize a machine state for the start of a line number | |
18246 | program. */ | |
18247 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
18248 | ||
8c43009f PA |
18249 | file_entry *current_file () |
18250 | { | |
18251 | /* lh->file_names is 0-based, but the file name numbers in the | |
18252 | statement program are 1-based. */ | |
6f77053d PA |
18253 | return m_line_header->file_name_at (m_file); |
18254 | } | |
18255 | ||
18256 | /* Record the line in the state machine. END_SEQUENCE is true if | |
18257 | we're processing the end of a sequence. */ | |
18258 | void record_line (bool end_sequence); | |
18259 | ||
18260 | /* Check address and if invalid nop-out the rest of the lines in this | |
18261 | sequence. */ | |
18262 | void check_line_address (struct dwarf2_cu *cu, | |
18263 | const gdb_byte *line_ptr, | |
18264 | CORE_ADDR lowpc, CORE_ADDR address); | |
18265 | ||
18266 | void handle_set_discriminator (unsigned int discriminator) | |
18267 | { | |
18268 | m_discriminator = discriminator; | |
18269 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
18270 | } | |
18271 | ||
18272 | /* Handle DW_LNE_set_address. */ | |
18273 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
18274 | { | |
18275 | m_op_index = 0; | |
18276 | address += baseaddr; | |
18277 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
18278 | } | |
18279 | ||
18280 | /* Handle DW_LNS_advance_pc. */ | |
18281 | void handle_advance_pc (CORE_ADDR adjust); | |
18282 | ||
18283 | /* Handle a special opcode. */ | |
18284 | void handle_special_opcode (unsigned char op_code); | |
18285 | ||
18286 | /* Handle DW_LNS_advance_line. */ | |
18287 | void handle_advance_line (int line_delta) | |
18288 | { | |
18289 | advance_line (line_delta); | |
18290 | } | |
18291 | ||
18292 | /* Handle DW_LNS_set_file. */ | |
18293 | void handle_set_file (file_name_index file); | |
18294 | ||
18295 | /* Handle DW_LNS_negate_stmt. */ | |
18296 | void handle_negate_stmt () | |
18297 | { | |
18298 | m_is_stmt = !m_is_stmt; | |
18299 | } | |
18300 | ||
18301 | /* Handle DW_LNS_const_add_pc. */ | |
18302 | void handle_const_add_pc (); | |
18303 | ||
18304 | /* Handle DW_LNS_fixed_advance_pc. */ | |
18305 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
18306 | { | |
18307 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18308 | m_op_index = 0; | |
18309 | } | |
18310 | ||
18311 | /* Handle DW_LNS_copy. */ | |
18312 | void handle_copy () | |
18313 | { | |
18314 | record_line (false); | |
18315 | m_discriminator = 0; | |
18316 | } | |
18317 | ||
18318 | /* Handle DW_LNE_end_sequence. */ | |
18319 | void handle_end_sequence () | |
18320 | { | |
18321 | m_record_line_callback = ::record_line; | |
18322 | } | |
18323 | ||
18324 | private: | |
18325 | /* Advance the line by LINE_DELTA. */ | |
18326 | void advance_line (int line_delta) | |
18327 | { | |
18328 | m_line += line_delta; | |
18329 | ||
18330 | if (line_delta != 0) | |
18331 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
18332 | } |
18333 | ||
6f77053d PA |
18334 | gdbarch *m_gdbarch; |
18335 | ||
18336 | /* True if we're recording lines. | |
18337 | Otherwise we're building partial symtabs and are just interested in | |
18338 | finding include files mentioned by the line number program. */ | |
18339 | bool m_record_lines_p; | |
18340 | ||
8c43009f | 18341 | /* The line number header. */ |
6f77053d | 18342 | line_header *m_line_header; |
8c43009f | 18343 | |
6f77053d PA |
18344 | /* These are part of the standard DWARF line number state machine, |
18345 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 18346 | |
6f77053d | 18347 | unsigned char m_op_index = 0; |
8c43009f | 18348 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
18349 | file_name_index m_file = (file_name_index) 1; |
18350 | unsigned int m_line = 1; | |
18351 | ||
18352 | /* These are initialized in the constructor. */ | |
18353 | ||
18354 | CORE_ADDR m_address; | |
18355 | bool m_is_stmt; | |
18356 | unsigned int m_discriminator; | |
d9b3de22 DE |
18357 | |
18358 | /* Additional bits of state we need to track. */ | |
18359 | ||
18360 | /* The last file that we called dwarf2_start_subfile for. | |
18361 | This is only used for TLLs. */ | |
6f77053d | 18362 | unsigned int m_last_file = 0; |
d9b3de22 | 18363 | /* The last file a line number was recorded for. */ |
6f77053d | 18364 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
18365 | |
18366 | /* The function to call to record a line. */ | |
6f77053d | 18367 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
18368 | |
18369 | /* The last line number that was recorded, used to coalesce | |
18370 | consecutive entries for the same line. This can happen, for | |
18371 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
18372 | unsigned int m_last_line = 0; |
18373 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 18374 | }; |
d9b3de22 | 18375 | |
6f77053d PA |
18376 | void |
18377 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
18378 | { | |
18379 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
18380 | / m_line_header->maximum_ops_per_instruction) | |
18381 | * m_line_header->minimum_instruction_length); | |
18382 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18383 | m_op_index = ((m_op_index + adjust) | |
18384 | % m_line_header->maximum_ops_per_instruction); | |
18385 | } | |
d9b3de22 | 18386 | |
6f77053d PA |
18387 | void |
18388 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 18389 | { |
6f77053d PA |
18390 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
18391 | CORE_ADDR addr_adj = (((m_op_index | |
18392 | + (adj_opcode / m_line_header->line_range)) | |
18393 | / m_line_header->maximum_ops_per_instruction) | |
18394 | * m_line_header->minimum_instruction_length); | |
18395 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18396 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
18397 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 18398 | |
6f77053d PA |
18399 | int line_delta = (m_line_header->line_base |
18400 | + (adj_opcode % m_line_header->line_range)); | |
18401 | advance_line (line_delta); | |
18402 | record_line (false); | |
18403 | m_discriminator = 0; | |
18404 | } | |
d9b3de22 | 18405 | |
6f77053d PA |
18406 | void |
18407 | lnp_state_machine::handle_set_file (file_name_index file) | |
18408 | { | |
18409 | m_file = file; | |
18410 | ||
18411 | const file_entry *fe = current_file (); | |
18412 | if (fe == NULL) | |
18413 | dwarf2_debug_line_missing_file_complaint (); | |
18414 | else if (m_record_lines_p) | |
18415 | { | |
18416 | const char *dir = fe->include_dir (m_line_header); | |
18417 | ||
18418 | m_last_subfile = current_subfile; | |
18419 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
18420 | dwarf2_start_subfile (fe->name, dir); | |
18421 | } | |
18422 | } | |
18423 | ||
18424 | void | |
18425 | lnp_state_machine::handle_const_add_pc () | |
18426 | { | |
18427 | CORE_ADDR adjust | |
18428 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
18429 | ||
18430 | CORE_ADDR addr_adj | |
18431 | = (((m_op_index + adjust) | |
18432 | / m_line_header->maximum_ops_per_instruction) | |
18433 | * m_line_header->minimum_instruction_length); | |
18434 | ||
18435 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18436 | m_op_index = ((m_op_index + adjust) | |
18437 | % m_line_header->maximum_ops_per_instruction); | |
18438 | } | |
d9b3de22 | 18439 | |
c91513d8 PP |
18440 | /* Ignore this record_line request. */ |
18441 | ||
18442 | static void | |
18443 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
18444 | { | |
18445 | return; | |
18446 | } | |
18447 | ||
a05a36a5 DE |
18448 | /* Return non-zero if we should add LINE to the line number table. |
18449 | LINE is the line to add, LAST_LINE is the last line that was added, | |
18450 | LAST_SUBFILE is the subfile for LAST_LINE. | |
18451 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
18452 | had a non-zero discriminator. | |
18453 | ||
18454 | We have to be careful in the presence of discriminators. | |
18455 | E.g., for this line: | |
18456 | ||
18457 | for (i = 0; i < 100000; i++); | |
18458 | ||
18459 | clang can emit four line number entries for that one line, | |
18460 | each with a different discriminator. | |
18461 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
18462 | ||
18463 | However, we want gdb to coalesce all four entries into one. | |
18464 | Otherwise the user could stepi into the middle of the line and | |
18465 | gdb would get confused about whether the pc really was in the | |
18466 | middle of the line. | |
18467 | ||
18468 | Things are further complicated by the fact that two consecutive | |
18469 | line number entries for the same line is a heuristic used by gcc | |
18470 | to denote the end of the prologue. So we can't just discard duplicate | |
18471 | entries, we have to be selective about it. The heuristic we use is | |
18472 | that we only collapse consecutive entries for the same line if at least | |
18473 | one of those entries has a non-zero discriminator. PR 17276. | |
18474 | ||
18475 | Note: Addresses in the line number state machine can never go backwards | |
18476 | within one sequence, thus this coalescing is ok. */ | |
18477 | ||
18478 | static int | |
18479 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
18480 | int line_has_non_zero_discriminator, | |
18481 | struct subfile *last_subfile) | |
18482 | { | |
18483 | if (current_subfile != last_subfile) | |
18484 | return 1; | |
18485 | if (line != last_line) | |
18486 | return 1; | |
18487 | /* Same line for the same file that we've seen already. | |
18488 | As a last check, for pr 17276, only record the line if the line | |
18489 | has never had a non-zero discriminator. */ | |
18490 | if (!line_has_non_zero_discriminator) | |
18491 | return 1; | |
18492 | return 0; | |
18493 | } | |
18494 | ||
252a6764 DE |
18495 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
18496 | in the line table of subfile SUBFILE. */ | |
18497 | ||
18498 | static void | |
d9b3de22 DE |
18499 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
18500 | unsigned int line, CORE_ADDR address, | |
18501 | record_line_ftype p_record_line) | |
252a6764 DE |
18502 | { |
18503 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
18504 | ||
27e0867f DE |
18505 | if (dwarf_line_debug) |
18506 | { | |
18507 | fprintf_unfiltered (gdb_stdlog, | |
18508 | "Recording line %u, file %s, address %s\n", | |
18509 | line, lbasename (subfile->name), | |
18510 | paddress (gdbarch, address)); | |
18511 | } | |
18512 | ||
d5962de5 | 18513 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
18514 | } |
18515 | ||
18516 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
18517 | Mark the end of a set of line number records. | |
d9b3de22 | 18518 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
18519 | If SUBFILE is NULL the request is ignored. */ |
18520 | ||
18521 | static void | |
18522 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
18523 | CORE_ADDR address, record_line_ftype p_record_line) | |
18524 | { | |
27e0867f DE |
18525 | if (subfile == NULL) |
18526 | return; | |
18527 | ||
18528 | if (dwarf_line_debug) | |
18529 | { | |
18530 | fprintf_unfiltered (gdb_stdlog, | |
18531 | "Finishing current line, file %s, address %s\n", | |
18532 | lbasename (subfile->name), | |
18533 | paddress (gdbarch, address)); | |
18534 | } | |
18535 | ||
d9b3de22 DE |
18536 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
18537 | } | |
18538 | ||
6f77053d PA |
18539 | void |
18540 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 18541 | { |
d9b3de22 DE |
18542 | if (dwarf_line_debug) |
18543 | { | |
18544 | fprintf_unfiltered (gdb_stdlog, | |
18545 | "Processing actual line %u: file %u," | |
18546 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
18547 | m_line, to_underlying (m_file), |
18548 | paddress (m_gdbarch, m_address), | |
18549 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
18550 | } |
18551 | ||
6f77053d | 18552 | file_entry *fe = current_file (); |
8c43009f PA |
18553 | |
18554 | if (fe == NULL) | |
d9b3de22 DE |
18555 | dwarf2_debug_line_missing_file_complaint (); |
18556 | /* For now we ignore lines not starting on an instruction boundary. | |
18557 | But not when processing end_sequence for compatibility with the | |
18558 | previous version of the code. */ | |
6f77053d | 18559 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 18560 | { |
8c43009f | 18561 | fe->included_p = 1; |
6f77053d | 18562 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 18563 | { |
6f77053d | 18564 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 18565 | { |
6f77053d PA |
18566 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
18567 | m_address, m_record_line_callback); | |
d9b3de22 DE |
18568 | } |
18569 | ||
18570 | if (!end_sequence) | |
18571 | { | |
6f77053d PA |
18572 | if (dwarf_record_line_p (m_line, m_last_line, |
18573 | m_line_has_non_zero_discriminator, | |
18574 | m_last_subfile)) | |
d9b3de22 | 18575 | { |
6f77053d PA |
18576 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
18577 | m_line, m_address, | |
18578 | m_record_line_callback); | |
d9b3de22 | 18579 | } |
6f77053d PA |
18580 | m_last_subfile = current_subfile; |
18581 | m_last_line = m_line; | |
d9b3de22 DE |
18582 | } |
18583 | } | |
18584 | } | |
18585 | } | |
18586 | ||
6f77053d PA |
18587 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
18588 | bool record_lines_p) | |
d9b3de22 | 18589 | { |
6f77053d PA |
18590 | m_gdbarch = arch; |
18591 | m_record_lines_p = record_lines_p; | |
18592 | m_line_header = lh; | |
d9b3de22 | 18593 | |
6f77053d | 18594 | m_record_line_callback = ::record_line; |
d9b3de22 | 18595 | |
d9b3de22 DE |
18596 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
18597 | was a line entry for it so that the backend has a chance to adjust it | |
18598 | and also record it in case it needs it. This is currently used by MIPS | |
18599 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
18600 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
18601 | m_is_stmt = lh->default_is_stmt; | |
18602 | m_discriminator = 0; | |
252a6764 DE |
18603 | } |
18604 | ||
6f77053d PA |
18605 | void |
18606 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
18607 | const gdb_byte *line_ptr, | |
18608 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
18609 | { |
18610 | /* If address < lowpc then it's not a usable value, it's outside the | |
18611 | pc range of the CU. However, we restrict the test to only address | |
18612 | values of zero to preserve GDB's previous behaviour which is to | |
18613 | handle the specific case of a function being GC'd by the linker. */ | |
18614 | ||
18615 | if (address == 0 && address < lowpc) | |
18616 | { | |
18617 | /* This line table is for a function which has been | |
18618 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
18619 | ||
18620 | struct objfile *objfile = cu->objfile; | |
18621 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
18622 | ||
18623 | complaint (&symfile_complaints, | |
18624 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
18625 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
18626 | m_record_line_callback = noop_record_line; |
18627 | /* Note: record_line_callback is left as noop_record_line until | |
18628 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
18629 | } |
18630 | } | |
18631 | ||
f3f5162e | 18632 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
18633 | Process the line number information in LH. |
18634 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
18635 | program in order to set included_p for every referenced header. */ | |
debd256d | 18636 | |
c906108c | 18637 | static void |
43f3e411 DE |
18638 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
18639 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 18640 | { |
d521ce57 TT |
18641 | const gdb_byte *line_ptr, *extended_end; |
18642 | const gdb_byte *line_end; | |
a8c50c1f | 18643 | unsigned int bytes_read, extended_len; |
699ca60a | 18644 | unsigned char op_code, extended_op; |
e142c38c DJ |
18645 | CORE_ADDR baseaddr; |
18646 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 18647 | bfd *abfd = objfile->obfd; |
fbf65064 | 18648 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
18649 | /* True if we're recording line info (as opposed to building partial |
18650 | symtabs and just interested in finding include files mentioned by | |
18651 | the line number program). */ | |
18652 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
18653 | |
18654 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18655 | |
debd256d JB |
18656 | line_ptr = lh->statement_program_start; |
18657 | line_end = lh->statement_program_end; | |
c906108c SS |
18658 | |
18659 | /* Read the statement sequences until there's nothing left. */ | |
18660 | while (line_ptr < line_end) | |
18661 | { | |
6f77053d PA |
18662 | /* The DWARF line number program state machine. Reset the state |
18663 | machine at the start of each sequence. */ | |
18664 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
18665 | bool end_sequence = false; | |
d9b3de22 | 18666 | |
8c43009f | 18667 | if (record_lines_p) |
c906108c | 18668 | { |
8c43009f PA |
18669 | /* Start a subfile for the current file of the state |
18670 | machine. */ | |
18671 | const file_entry *fe = state_machine.current_file (); | |
18672 | ||
18673 | if (fe != NULL) | |
18674 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
18675 | } |
18676 | ||
a738430d | 18677 | /* Decode the table. */ |
d9b3de22 | 18678 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
18679 | { |
18680 | op_code = read_1_byte (abfd, line_ptr); | |
18681 | line_ptr += 1; | |
9aa1fe7e | 18682 | |
debd256d | 18683 | if (op_code >= lh->opcode_base) |
6e70227d | 18684 | { |
8e07a239 | 18685 | /* Special opcode. */ |
6f77053d | 18686 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
18687 | } |
18688 | else switch (op_code) | |
c906108c SS |
18689 | { |
18690 | case DW_LNS_extended_op: | |
3e43a32a MS |
18691 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
18692 | &bytes_read); | |
473b7be6 | 18693 | line_ptr += bytes_read; |
a8c50c1f | 18694 | extended_end = line_ptr + extended_len; |
c906108c SS |
18695 | extended_op = read_1_byte (abfd, line_ptr); |
18696 | line_ptr += 1; | |
18697 | switch (extended_op) | |
18698 | { | |
18699 | case DW_LNE_end_sequence: | |
6f77053d PA |
18700 | state_machine.handle_end_sequence (); |
18701 | end_sequence = true; | |
c906108c SS |
18702 | break; |
18703 | case DW_LNE_set_address: | |
d9b3de22 DE |
18704 | { |
18705 | CORE_ADDR address | |
18706 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 18707 | line_ptr += bytes_read; |
6f77053d PA |
18708 | |
18709 | state_machine.check_line_address (cu, line_ptr, | |
18710 | lowpc, address); | |
18711 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 18712 | } |
c906108c SS |
18713 | break; |
18714 | case DW_LNE_define_file: | |
debd256d | 18715 | { |
d521ce57 | 18716 | const char *cur_file; |
ecfb656c PA |
18717 | unsigned int mod_time, length; |
18718 | dir_index dindex; | |
6e70227d | 18719 | |
3e43a32a MS |
18720 | cur_file = read_direct_string (abfd, line_ptr, |
18721 | &bytes_read); | |
debd256d | 18722 | line_ptr += bytes_read; |
ecfb656c | 18723 | dindex = (dir_index) |
debd256d JB |
18724 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
18725 | line_ptr += bytes_read; | |
18726 | mod_time = | |
18727 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18728 | line_ptr += bytes_read; | |
18729 | length = | |
18730 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18731 | line_ptr += bytes_read; | |
ecfb656c | 18732 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 18733 | } |
c906108c | 18734 | break; |
d0c6ba3d | 18735 | case DW_LNE_set_discriminator: |
6f77053d PA |
18736 | { |
18737 | /* The discriminator is not interesting to the | |
18738 | debugger; just ignore it. We still need to | |
18739 | check its value though: | |
18740 | if there are consecutive entries for the same | |
18741 | (non-prologue) line we want to coalesce them. | |
18742 | PR 17276. */ | |
18743 | unsigned int discr | |
18744 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18745 | line_ptr += bytes_read; | |
18746 | ||
18747 | state_machine.handle_set_discriminator (discr); | |
18748 | } | |
d0c6ba3d | 18749 | break; |
c906108c | 18750 | default: |
4d3c2250 | 18751 | complaint (&symfile_complaints, |
e2e0b3e5 | 18752 | _("mangled .debug_line section")); |
debd256d | 18753 | return; |
c906108c | 18754 | } |
a8c50c1f DJ |
18755 | /* Make sure that we parsed the extended op correctly. If e.g. |
18756 | we expected a different address size than the producer used, | |
18757 | we may have read the wrong number of bytes. */ | |
18758 | if (line_ptr != extended_end) | |
18759 | { | |
18760 | complaint (&symfile_complaints, | |
18761 | _("mangled .debug_line section")); | |
18762 | return; | |
18763 | } | |
c906108c SS |
18764 | break; |
18765 | case DW_LNS_copy: | |
6f77053d | 18766 | state_machine.handle_copy (); |
c906108c SS |
18767 | break; |
18768 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
18769 | { |
18770 | CORE_ADDR adjust | |
18771 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 18772 | line_ptr += bytes_read; |
6f77053d PA |
18773 | |
18774 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 18775 | } |
c906108c SS |
18776 | break; |
18777 | case DW_LNS_advance_line: | |
a05a36a5 DE |
18778 | { |
18779 | int line_delta | |
18780 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 18781 | line_ptr += bytes_read; |
6f77053d PA |
18782 | |
18783 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 18784 | } |
c906108c SS |
18785 | break; |
18786 | case DW_LNS_set_file: | |
d9b3de22 | 18787 | { |
6f77053d | 18788 | file_name_index file |
ecfb656c PA |
18789 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
18790 | &bytes_read); | |
d9b3de22 | 18791 | line_ptr += bytes_read; |
8c43009f | 18792 | |
6f77053d | 18793 | state_machine.handle_set_file (file); |
d9b3de22 | 18794 | } |
c906108c SS |
18795 | break; |
18796 | case DW_LNS_set_column: | |
0ad93d4f | 18797 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18798 | line_ptr += bytes_read; |
18799 | break; | |
18800 | case DW_LNS_negate_stmt: | |
6f77053d | 18801 | state_machine.handle_negate_stmt (); |
c906108c SS |
18802 | break; |
18803 | case DW_LNS_set_basic_block: | |
c906108c | 18804 | break; |
c2c6d25f JM |
18805 | /* Add to the address register of the state machine the |
18806 | address increment value corresponding to special opcode | |
a738430d MK |
18807 | 255. I.e., this value is scaled by the minimum |
18808 | instruction length since special opcode 255 would have | |
b021a221 | 18809 | scaled the increment. */ |
c906108c | 18810 | case DW_LNS_const_add_pc: |
6f77053d | 18811 | state_machine.handle_const_add_pc (); |
c906108c SS |
18812 | break; |
18813 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 18814 | { |
6f77053d | 18815 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 18816 | line_ptr += 2; |
6f77053d PA |
18817 | |
18818 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 18819 | } |
c906108c | 18820 | break; |
9aa1fe7e | 18821 | default: |
a738430d MK |
18822 | { |
18823 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18824 | int i; |
a738430d | 18825 | |
debd256d | 18826 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18827 | { |
18828 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18829 | line_ptr += bytes_read; | |
18830 | } | |
18831 | } | |
c906108c SS |
18832 | } |
18833 | } | |
d9b3de22 DE |
18834 | |
18835 | if (!end_sequence) | |
18836 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18837 | ||
18838 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18839 | in which case we still finish recording the last line). */ | |
6f77053d | 18840 | state_machine.record_line (true); |
c906108c | 18841 | } |
f3f5162e DE |
18842 | } |
18843 | ||
18844 | /* Decode the Line Number Program (LNP) for the given line_header | |
18845 | structure and CU. The actual information extracted and the type | |
18846 | of structures created from the LNP depends on the value of PST. | |
18847 | ||
18848 | 1. If PST is NULL, then this procedure uses the data from the program | |
18849 | to create all necessary symbol tables, and their linetables. | |
18850 | ||
18851 | 2. If PST is not NULL, this procedure reads the program to determine | |
18852 | the list of files included by the unit represented by PST, and | |
18853 | builds all the associated partial symbol tables. | |
18854 | ||
18855 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18856 | It is used for relative paths in the line table. | |
18857 | NOTE: When processing partial symtabs (pst != NULL), | |
18858 | comp_dir == pst->dirname. | |
18859 | ||
18860 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18861 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18862 | symtab we don't use it in the name of the psymtabs we create. | |
18863 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18864 | A good testcase for this is mb-inline.exp. |
18865 | ||
527f3840 JK |
18866 | LOWPC is the lowest address in CU (or 0 if not known). |
18867 | ||
18868 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18869 | for its PC<->lines mapping information. Otherwise only the filename | |
18870 | table is read in. */ | |
f3f5162e DE |
18871 | |
18872 | static void | |
18873 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18874 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18875 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18876 | { |
18877 | struct objfile *objfile = cu->objfile; | |
18878 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18879 | |
527f3840 JK |
18880 | if (decode_mapping) |
18881 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18882 | |
18883 | if (decode_for_pst_p) | |
18884 | { | |
18885 | int file_index; | |
18886 | ||
18887 | /* Now that we're done scanning the Line Header Program, we can | |
18888 | create the psymtab of each included file. */ | |
fff8551c | 18889 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
18890 | if (lh->file_names[file_index].included_p == 1) |
18891 | { | |
d521ce57 | 18892 | const char *include_name = |
c6da4cef DE |
18893 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18894 | if (include_name != NULL) | |
aaa75496 JB |
18895 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18896 | } | |
18897 | } | |
cb1df416 DJ |
18898 | else |
18899 | { | |
18900 | /* Make sure a symtab is created for every file, even files | |
18901 | which contain only variables (i.e. no code with associated | |
18902 | line numbers). */ | |
43f3e411 | 18903 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18904 | int i; |
cb1df416 | 18905 | |
fff8551c | 18906 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 18907 | { |
8c43009f | 18908 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 18909 | |
8c43009f | 18910 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 18911 | |
cb1df416 | 18912 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18913 | { |
18914 | current_subfile->symtab | |
18915 | = allocate_symtab (cust, current_subfile->name); | |
18916 | } | |
8c43009f | 18917 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
18918 | } |
18919 | } | |
c906108c SS |
18920 | } |
18921 | ||
18922 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18923 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18924 | or NULL if not known. |
c906108c SS |
18925 | This routine tries to keep line numbers from identical absolute and |
18926 | relative file names in a common subfile. | |
18927 | ||
18928 | Using the `list' example from the GDB testsuite, which resides in | |
18929 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18930 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18931 | ||
c5aa993b | 18932 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18933 | DW_AT_comp_dir: /compdir |
357e46e7 | 18934 | files.files[0].name: list0.h |
c5aa993b | 18935 | files.files[0].dir: /srcdir |
357e46e7 | 18936 | files.files[1].name: list0.c |
c5aa993b | 18937 | files.files[1].dir: /srcdir |
c906108c SS |
18938 | |
18939 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18940 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18941 | start_subfile will ensure that this happens provided that we pass the | |
18942 | concatenation of files.files[1].dir and files.files[1].name as the | |
18943 | subfile's name. */ | |
c906108c SS |
18944 | |
18945 | static void | |
4d663531 | 18946 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18947 | { |
d521ce57 | 18948 | char *copy = NULL; |
4f1520fb | 18949 | |
4d663531 | 18950 | /* In order not to lose the line information directory, |
4f1520fb FR |
18951 | we concatenate it to the filename when it makes sense. |
18952 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18953 | information): ``The directory index is ignored for file names | |
18954 | that represent full path names''. Thus ignoring dirname in the | |
18955 | `else' branch below isn't an issue. */ | |
c906108c | 18956 | |
d5166ae1 | 18957 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18958 | { |
18959 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18960 | filename = copy; | |
18961 | } | |
c906108c | 18962 | |
4d663531 | 18963 | start_subfile (filename); |
4f1520fb | 18964 | |
d521ce57 TT |
18965 | if (copy != NULL) |
18966 | xfree (copy); | |
c906108c SS |
18967 | } |
18968 | ||
f4dc4d17 DE |
18969 | /* Start a symtab for DWARF. |
18970 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18971 | ||
43f3e411 | 18972 | static struct compunit_symtab * |
f4dc4d17 | 18973 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18974 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18975 | { |
43f3e411 DE |
18976 | struct compunit_symtab *cust |
18977 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18978 | ||
f4dc4d17 DE |
18979 | record_debugformat ("DWARF 2"); |
18980 | record_producer (cu->producer); | |
18981 | ||
18982 | /* We assume that we're processing GCC output. */ | |
18983 | processing_gcc_compilation = 2; | |
18984 | ||
4d4ec4e5 | 18985 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18986 | |
18987 | return cust; | |
f4dc4d17 DE |
18988 | } |
18989 | ||
4c2df51b DJ |
18990 | static void |
18991 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18992 | struct dwarf2_cu *cu) |
4c2df51b | 18993 | { |
e7c27a73 DJ |
18994 | struct objfile *objfile = cu->objfile; |
18995 | struct comp_unit_head *cu_header = &cu->header; | |
18996 | ||
4c2df51b DJ |
18997 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
18998 | code here to turn a symbol with DW_AT_external and a | |
18999 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19000 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19001 | with some versions of binutils) where shared libraries could have | |
19002 | relocations against symbols in their debug information - the | |
19003 | minimal symbol would have the right address, but the debug info | |
19004 | would not. It's no longer necessary, because we will explicitly | |
19005 | apply relocations when we read in the debug information now. */ | |
19006 | ||
19007 | /* A DW_AT_location attribute with no contents indicates that a | |
19008 | variable has been optimized away. */ | |
19009 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19010 | { | |
f1e6e072 | 19011 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19012 | return; |
19013 | } | |
19014 | ||
19015 | /* Handle one degenerate form of location expression specially, to | |
19016 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19017 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19018 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19019 | |
19020 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19021 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19022 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19023 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19024 | && (DW_BLOCK (attr)->size | |
19025 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19026 | { |
891d2f0b | 19027 | unsigned int dummy; |
4c2df51b | 19028 | |
3019eac3 DE |
19029 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19030 | SYMBOL_VALUE_ADDRESS (sym) = | |
19031 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19032 | else | |
19033 | SYMBOL_VALUE_ADDRESS (sym) = | |
19034 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19035 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19036 | fixup_symbol_section (sym, objfile); |
19037 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19038 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19039 | return; |
19040 | } | |
19041 | ||
19042 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19043 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19044 | (i.e. when the value of a register or memory location is | |
19045 | referenced, or a thread-local block, etc.). Then again, it might | |
19046 | not be worthwhile. I'm assuming that it isn't unless performance | |
19047 | or memory numbers show me otherwise. */ | |
19048 | ||
f1e6e072 | 19049 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19050 | |
f1e6e072 | 19051 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19052 | cu->has_loclist = 1; |
4c2df51b DJ |
19053 | } |
19054 | ||
c906108c SS |
19055 | /* Given a pointer to a DWARF information entry, figure out if we need |
19056 | to make a symbol table entry for it, and if so, create a new entry | |
19057 | and return a pointer to it. | |
19058 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19059 | used the passed type. |
19060 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19061 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19062 | |
19063 | static struct symbol * | |
34eaf542 TT |
19064 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19065 | struct symbol *space) | |
c906108c | 19066 | { |
e7c27a73 | 19067 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19068 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19069 | struct symbol *sym = NULL; |
15d034d0 | 19070 | const char *name; |
c906108c SS |
19071 | struct attribute *attr = NULL; |
19072 | struct attribute *attr2 = NULL; | |
e142c38c | 19073 | CORE_ADDR baseaddr; |
e37fd15a SW |
19074 | struct pending **list_to_add = NULL; |
19075 | ||
edb3359d | 19076 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19077 | |
19078 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19079 | |
94af9270 | 19080 | name = dwarf2_name (die, cu); |
c906108c SS |
19081 | if (name) |
19082 | { | |
94af9270 | 19083 | const char *linkagename; |
34eaf542 | 19084 | int suppress_add = 0; |
94af9270 | 19085 | |
34eaf542 TT |
19086 | if (space) |
19087 | sym = space; | |
19088 | else | |
e623cf5d | 19089 | sym = allocate_symbol (objfile); |
c906108c | 19090 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19091 | |
19092 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19093 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19094 | linkagename = dwarf2_physname (name, die, cu); |
19095 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19096 | |
f55ee35c JK |
19097 | /* Fortran does not have mangling standard and the mangling does differ |
19098 | between gfortran, iFort etc. */ | |
19099 | if (cu->language == language_fortran | |
b250c185 | 19100 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19101 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19102 | dwarf2_full_name (name, die, cu), |
29df156d | 19103 | NULL); |
f55ee35c | 19104 | |
c906108c | 19105 | /* Default assumptions. |
c5aa993b | 19106 | Use the passed type or decode it from the die. */ |
176620f1 | 19107 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19108 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19109 | if (type != NULL) |
19110 | SYMBOL_TYPE (sym) = type; | |
19111 | else | |
e7c27a73 | 19112 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19113 | attr = dwarf2_attr (die, |
19114 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19115 | cu); | |
c906108c SS |
19116 | if (attr) |
19117 | { | |
19118 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19119 | } | |
cb1df416 | 19120 | |
edb3359d DJ |
19121 | attr = dwarf2_attr (die, |
19122 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19123 | cu); | |
cb1df416 DJ |
19124 | if (attr) |
19125 | { | |
ecfb656c | 19126 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19127 | struct file_entry *fe; |
9a619af0 | 19128 | |
ecfb656c PA |
19129 | if (cu->line_header != NULL) |
19130 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19131 | else |
19132 | fe = NULL; | |
19133 | ||
19134 | if (fe == NULL) | |
cb1df416 DJ |
19135 | complaint (&symfile_complaints, |
19136 | _("file index out of range")); | |
8c43009f PA |
19137 | else |
19138 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19139 | } |
19140 | ||
c906108c SS |
19141 | switch (die->tag) |
19142 | { | |
19143 | case DW_TAG_label: | |
e142c38c | 19144 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19145 | if (attr) |
3e29f34a MR |
19146 | { |
19147 | CORE_ADDR addr; | |
19148 | ||
19149 | addr = attr_value_as_address (attr); | |
19150 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19151 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19152 | } | |
0f5238ed TT |
19153 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19154 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19155 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19156 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19157 | break; |
19158 | case DW_TAG_subprogram: | |
19159 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19160 | finish_block. */ | |
f1e6e072 | 19161 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19162 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19163 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19164 | || cu->language == language_ada) | |
c906108c | 19165 | { |
2cfa0c8d JB |
19166 | /* Subprograms marked external are stored as a global symbol. |
19167 | Ada subprograms, whether marked external or not, are always | |
19168 | stored as a global symbol, because we want to be able to | |
19169 | access them globally. For instance, we want to be able | |
19170 | to break on a nested subprogram without having to | |
19171 | specify the context. */ | |
e37fd15a | 19172 | list_to_add = &global_symbols; |
c906108c SS |
19173 | } |
19174 | else | |
19175 | { | |
e37fd15a | 19176 | list_to_add = cu->list_in_scope; |
c906108c SS |
19177 | } |
19178 | break; | |
edb3359d DJ |
19179 | case DW_TAG_inlined_subroutine: |
19180 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19181 | finish_block. */ | |
f1e6e072 | 19182 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 19183 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 19184 | list_to_add = cu->list_in_scope; |
edb3359d | 19185 | break; |
34eaf542 TT |
19186 | case DW_TAG_template_value_param: |
19187 | suppress_add = 1; | |
19188 | /* Fall through. */ | |
72929c62 | 19189 | case DW_TAG_constant: |
c906108c | 19190 | case DW_TAG_variable: |
254e6b9e | 19191 | case DW_TAG_member: |
0963b4bd MS |
19192 | /* Compilation with minimal debug info may result in |
19193 | variables with missing type entries. Change the | |
19194 | misleading `void' type to something sensible. */ | |
c906108c | 19195 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 19196 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 19197 | |
e142c38c | 19198 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
19199 | /* In the case of DW_TAG_member, we should only be called for |
19200 | static const members. */ | |
19201 | if (die->tag == DW_TAG_member) | |
19202 | { | |
3863f96c DE |
19203 | /* dwarf2_add_field uses die_is_declaration, |
19204 | so we do the same. */ | |
254e6b9e DE |
19205 | gdb_assert (die_is_declaration (die, cu)); |
19206 | gdb_assert (attr); | |
19207 | } | |
c906108c SS |
19208 | if (attr) |
19209 | { | |
e7c27a73 | 19210 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 19211 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 19212 | if (!suppress_add) |
34eaf542 TT |
19213 | { |
19214 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 19215 | list_to_add = &global_symbols; |
34eaf542 | 19216 | else |
e37fd15a | 19217 | list_to_add = cu->list_in_scope; |
34eaf542 | 19218 | } |
c906108c SS |
19219 | break; |
19220 | } | |
e142c38c | 19221 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19222 | if (attr) |
19223 | { | |
e7c27a73 | 19224 | var_decode_location (attr, sym, cu); |
e142c38c | 19225 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
19226 | |
19227 | /* Fortran explicitly imports any global symbols to the local | |
19228 | scope by DW_TAG_common_block. */ | |
19229 | if (cu->language == language_fortran && die->parent | |
19230 | && die->parent->tag == DW_TAG_common_block) | |
19231 | attr2 = NULL; | |
19232 | ||
caac4577 JG |
19233 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
19234 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
19235 | && !dwarf2_per_objfile->has_section_at_zero) | |
19236 | { | |
19237 | /* When a static variable is eliminated by the linker, | |
19238 | the corresponding debug information is not stripped | |
19239 | out, but the variable address is set to null; | |
19240 | do not add such variables into symbol table. */ | |
19241 | } | |
19242 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 19243 | { |
f55ee35c JK |
19244 | /* Workaround gfortran PR debug/40040 - it uses |
19245 | DW_AT_location for variables in -fPIC libraries which may | |
19246 | get overriden by other libraries/executable and get | |
19247 | a different address. Resolve it by the minimal symbol | |
19248 | which may come from inferior's executable using copy | |
19249 | relocation. Make this workaround only for gfortran as for | |
19250 | other compilers GDB cannot guess the minimal symbol | |
19251 | Fortran mangling kind. */ | |
19252 | if (cu->language == language_fortran && die->parent | |
19253 | && die->parent->tag == DW_TAG_module | |
19254 | && cu->producer | |
28586665 | 19255 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 19256 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 19257 | |
1c809c68 TT |
19258 | /* A variable with DW_AT_external is never static, |
19259 | but it may be block-scoped. */ | |
19260 | list_to_add = (cu->list_in_scope == &file_symbols | |
19261 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 19262 | } |
c906108c | 19263 | else |
e37fd15a | 19264 | list_to_add = cu->list_in_scope; |
c906108c SS |
19265 | } |
19266 | else | |
19267 | { | |
19268 | /* We do not know the address of this symbol. | |
c5aa993b JM |
19269 | If it is an external symbol and we have type information |
19270 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
19271 | The address of the variable will then be determined from | |
19272 | the minimal symbol table whenever the variable is | |
19273 | referenced. */ | |
e142c38c | 19274 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
19275 | |
19276 | /* Fortran explicitly imports any global symbols to the local | |
19277 | scope by DW_TAG_common_block. */ | |
19278 | if (cu->language == language_fortran && die->parent | |
19279 | && die->parent->tag == DW_TAG_common_block) | |
19280 | { | |
19281 | /* SYMBOL_CLASS doesn't matter here because | |
19282 | read_common_block is going to reset it. */ | |
19283 | if (!suppress_add) | |
19284 | list_to_add = cu->list_in_scope; | |
19285 | } | |
19286 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
19287 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 19288 | { |
0fe7935b DJ |
19289 | /* A variable with DW_AT_external is never static, but it |
19290 | may be block-scoped. */ | |
19291 | list_to_add = (cu->list_in_scope == &file_symbols | |
19292 | ? &global_symbols : cu->list_in_scope); | |
19293 | ||
f1e6e072 | 19294 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 19295 | } |
442ddf59 JK |
19296 | else if (!die_is_declaration (die, cu)) |
19297 | { | |
19298 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
19299 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
19300 | if (!suppress_add) |
19301 | list_to_add = cu->list_in_scope; | |
442ddf59 | 19302 | } |
c906108c SS |
19303 | } |
19304 | break; | |
19305 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
19306 | /* If we are inside a function, mark this as an argument. If |
19307 | not, we might be looking at an argument to an inlined function | |
19308 | when we do not have enough information to show inlined frames; | |
19309 | pretend it's a local variable in that case so that the user can | |
19310 | still see it. */ | |
19311 | if (context_stack_depth > 0 | |
19312 | && context_stack[context_stack_depth - 1].name != NULL) | |
19313 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 19314 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19315 | if (attr) |
19316 | { | |
e7c27a73 | 19317 | var_decode_location (attr, sym, cu); |
c906108c | 19318 | } |
e142c38c | 19319 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19320 | if (attr) |
19321 | { | |
e7c27a73 | 19322 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19323 | } |
f346a30d | 19324 | |
e37fd15a | 19325 | list_to_add = cu->list_in_scope; |
c906108c SS |
19326 | break; |
19327 | case DW_TAG_unspecified_parameters: | |
19328 | /* From varargs functions; gdb doesn't seem to have any | |
19329 | interest in this information, so just ignore it for now. | |
19330 | (FIXME?) */ | |
19331 | break; | |
34eaf542 TT |
19332 | case DW_TAG_template_type_param: |
19333 | suppress_add = 1; | |
19334 | /* Fall through. */ | |
c906108c | 19335 | case DW_TAG_class_type: |
680b30c7 | 19336 | case DW_TAG_interface_type: |
c906108c SS |
19337 | case DW_TAG_structure_type: |
19338 | case DW_TAG_union_type: | |
72019c9c | 19339 | case DW_TAG_set_type: |
c906108c | 19340 | case DW_TAG_enumeration_type: |
f1e6e072 | 19341 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19342 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 19343 | |
63d06c5c | 19344 | { |
9c37b5ae | 19345 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
19346 | really ever be static objects: otherwise, if you try |
19347 | to, say, break of a class's method and you're in a file | |
19348 | which doesn't mention that class, it won't work unless | |
19349 | the check for all static symbols in lookup_symbol_aux | |
19350 | saves you. See the OtherFileClass tests in | |
19351 | gdb.c++/namespace.exp. */ | |
19352 | ||
e37fd15a | 19353 | if (!suppress_add) |
34eaf542 | 19354 | { |
34eaf542 | 19355 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19356 | && cu->language == language_cplus |
34eaf542 | 19357 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19358 | |
64382290 | 19359 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 19360 | ... }" also defines a typedef for "foo". */ |
64382290 | 19361 | if (cu->language == language_cplus |
45280282 | 19362 | || cu->language == language_ada |
c44af4eb TT |
19363 | || cu->language == language_d |
19364 | || cu->language == language_rust) | |
64382290 TT |
19365 | { |
19366 | /* The symbol's name is already allocated along | |
19367 | with this objfile, so we don't need to | |
19368 | duplicate it for the type. */ | |
19369 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
19370 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
19371 | } | |
63d06c5c DC |
19372 | } |
19373 | } | |
c906108c SS |
19374 | break; |
19375 | case DW_TAG_typedef: | |
f1e6e072 | 19376 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 19377 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19378 | list_to_add = cu->list_in_scope; |
63d06c5c | 19379 | break; |
c906108c | 19380 | case DW_TAG_base_type: |
a02abb62 | 19381 | case DW_TAG_subrange_type: |
f1e6e072 | 19382 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19383 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19384 | list_to_add = cu->list_in_scope; |
c906108c SS |
19385 | break; |
19386 | case DW_TAG_enumerator: | |
e142c38c | 19387 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19388 | if (attr) |
19389 | { | |
e7c27a73 | 19390 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19391 | } |
63d06c5c DC |
19392 | { |
19393 | /* NOTE: carlton/2003-11-10: See comment above in the | |
19394 | DW_TAG_class_type, etc. block. */ | |
19395 | ||
e142c38c | 19396 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19397 | && cu->language == language_cplus |
e142c38c | 19398 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19399 | } |
c906108c | 19400 | break; |
74921315 | 19401 | case DW_TAG_imported_declaration: |
5c4e30ca | 19402 | case DW_TAG_namespace: |
f1e6e072 | 19403 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 19404 | list_to_add = &global_symbols; |
5c4e30ca | 19405 | break; |
530e8392 KB |
19406 | case DW_TAG_module: |
19407 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
19408 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
19409 | list_to_add = &global_symbols; | |
19410 | break; | |
4357ac6c | 19411 | case DW_TAG_common_block: |
f1e6e072 | 19412 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
19413 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
19414 | add_symbol_to_list (sym, cu->list_in_scope); | |
19415 | break; | |
c906108c SS |
19416 | default: |
19417 | /* Not a tag we recognize. Hopefully we aren't processing | |
19418 | trash data, but since we must specifically ignore things | |
19419 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 19420 | this point. */ |
e2e0b3e5 | 19421 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 19422 | dwarf_tag_name (die->tag)); |
c906108c SS |
19423 | break; |
19424 | } | |
df8a16a1 | 19425 | |
e37fd15a SW |
19426 | if (suppress_add) |
19427 | { | |
19428 | sym->hash_next = objfile->template_symbols; | |
19429 | objfile->template_symbols = sym; | |
19430 | list_to_add = NULL; | |
19431 | } | |
19432 | ||
19433 | if (list_to_add != NULL) | |
19434 | add_symbol_to_list (sym, list_to_add); | |
19435 | ||
df8a16a1 DJ |
19436 | /* For the benefit of old versions of GCC, check for anonymous |
19437 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 19438 | if (!cu->processing_has_namespace_info |
94af9270 | 19439 | && cu->language == language_cplus) |
a10964d1 | 19440 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
19441 | } |
19442 | return (sym); | |
19443 | } | |
19444 | ||
34eaf542 TT |
19445 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
19446 | ||
19447 | static struct symbol * | |
19448 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
19449 | { | |
19450 | return new_symbol_full (die, type, cu, NULL); | |
19451 | } | |
19452 | ||
98bfdba5 PA |
19453 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
19454 | zero-extend it as appropriate for the symbol's type. The DWARF | |
19455 | standard (v4) is not entirely clear about the meaning of using | |
19456 | DW_FORM_dataN for a constant with a signed type, where the type is | |
19457 | wider than the data. The conclusion of a discussion on the DWARF | |
19458 | list was that this is unspecified. We choose to always zero-extend | |
19459 | because that is the interpretation long in use by GCC. */ | |
c906108c | 19460 | |
98bfdba5 | 19461 | static gdb_byte * |
ff39bb5e | 19462 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 19463 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 19464 | { |
e7c27a73 | 19465 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
19466 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
19467 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
19468 | LONGEST l = DW_UNSND (attr); |
19469 | ||
19470 | if (bits < sizeof (*value) * 8) | |
19471 | { | |
19472 | l &= ((LONGEST) 1 << bits) - 1; | |
19473 | *value = l; | |
19474 | } | |
19475 | else if (bits == sizeof (*value) * 8) | |
19476 | *value = l; | |
19477 | else | |
19478 | { | |
224c3ddb | 19479 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
19480 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
19481 | return bytes; | |
19482 | } | |
19483 | ||
19484 | return NULL; | |
19485 | } | |
19486 | ||
19487 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
19488 | the value does not fit in *VALUE, set *BYTES - either already | |
19489 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
19490 | or, set *BATON, if we translated the constant to a location | |
19491 | expression. */ | |
19492 | ||
19493 | static void | |
ff39bb5e | 19494 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
19495 | const char *name, struct obstack *obstack, |
19496 | struct dwarf2_cu *cu, | |
d521ce57 | 19497 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
19498 | struct dwarf2_locexpr_baton **baton) |
19499 | { | |
19500 | struct objfile *objfile = cu->objfile; | |
19501 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 19502 | struct dwarf_block *blk; |
98bfdba5 PA |
19503 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
19504 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19505 | ||
19506 | *value = 0; | |
19507 | *bytes = NULL; | |
19508 | *baton = NULL; | |
c906108c SS |
19509 | |
19510 | switch (attr->form) | |
19511 | { | |
19512 | case DW_FORM_addr: | |
3019eac3 | 19513 | case DW_FORM_GNU_addr_index: |
ac56253d | 19514 | { |
ac56253d TT |
19515 | gdb_byte *data; |
19516 | ||
98bfdba5 PA |
19517 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
19518 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 19519 | cu_header->addr_size, |
98bfdba5 | 19520 | TYPE_LENGTH (type)); |
ac56253d TT |
19521 | /* Symbols of this form are reasonably rare, so we just |
19522 | piggyback on the existing location code rather than writing | |
19523 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 19524 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
19525 | (*baton)->per_cu = cu->per_cu; |
19526 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 19527 | |
98bfdba5 | 19528 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 19529 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 19530 | (*baton)->data = data; |
ac56253d TT |
19531 | |
19532 | data[0] = DW_OP_addr; | |
19533 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
19534 | byte_order, DW_ADDR (attr)); | |
19535 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 19536 | } |
c906108c | 19537 | break; |
4ac36638 | 19538 | case DW_FORM_string: |
93b5768b | 19539 | case DW_FORM_strp: |
3019eac3 | 19540 | case DW_FORM_GNU_str_index: |
36586728 | 19541 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
19542 | /* DW_STRING is already allocated on the objfile obstack, point |
19543 | directly to it. */ | |
d521ce57 | 19544 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 19545 | break; |
c906108c SS |
19546 | case DW_FORM_block1: |
19547 | case DW_FORM_block2: | |
19548 | case DW_FORM_block4: | |
19549 | case DW_FORM_block: | |
2dc7f7b3 | 19550 | case DW_FORM_exprloc: |
0224619f | 19551 | case DW_FORM_data16: |
c906108c | 19552 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
19553 | if (TYPE_LENGTH (type) != blk->size) |
19554 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
19555 | TYPE_LENGTH (type)); | |
19556 | *bytes = blk->data; | |
c906108c | 19557 | break; |
2df3850c JM |
19558 | |
19559 | /* The DW_AT_const_value attributes are supposed to carry the | |
19560 | symbol's value "represented as it would be on the target | |
19561 | architecture." By the time we get here, it's already been | |
19562 | converted to host endianness, so we just need to sign- or | |
19563 | zero-extend it as appropriate. */ | |
19564 | case DW_FORM_data1: | |
3aef2284 | 19565 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 19566 | break; |
c906108c | 19567 | case DW_FORM_data2: |
3aef2284 | 19568 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 19569 | break; |
c906108c | 19570 | case DW_FORM_data4: |
3aef2284 | 19571 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 19572 | break; |
c906108c | 19573 | case DW_FORM_data8: |
3aef2284 | 19574 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
19575 | break; |
19576 | ||
c906108c | 19577 | case DW_FORM_sdata: |
663c44ac | 19578 | case DW_FORM_implicit_const: |
98bfdba5 | 19579 | *value = DW_SND (attr); |
2df3850c JM |
19580 | break; |
19581 | ||
c906108c | 19582 | case DW_FORM_udata: |
98bfdba5 | 19583 | *value = DW_UNSND (attr); |
c906108c | 19584 | break; |
2df3850c | 19585 | |
c906108c | 19586 | default: |
4d3c2250 | 19587 | complaint (&symfile_complaints, |
e2e0b3e5 | 19588 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 19589 | dwarf_form_name (attr->form)); |
98bfdba5 | 19590 | *value = 0; |
c906108c SS |
19591 | break; |
19592 | } | |
19593 | } | |
19594 | ||
2df3850c | 19595 | |
98bfdba5 PA |
19596 | /* Copy constant value from an attribute to a symbol. */ |
19597 | ||
2df3850c | 19598 | static void |
ff39bb5e | 19599 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 19600 | struct dwarf2_cu *cu) |
2df3850c | 19601 | { |
98bfdba5 | 19602 | struct objfile *objfile = cu->objfile; |
12df843f | 19603 | LONGEST value; |
d521ce57 | 19604 | const gdb_byte *bytes; |
98bfdba5 | 19605 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 19606 | |
98bfdba5 PA |
19607 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
19608 | SYMBOL_PRINT_NAME (sym), | |
19609 | &objfile->objfile_obstack, cu, | |
19610 | &value, &bytes, &baton); | |
2df3850c | 19611 | |
98bfdba5 PA |
19612 | if (baton != NULL) |
19613 | { | |
98bfdba5 | 19614 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 19615 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
19616 | } |
19617 | else if (bytes != NULL) | |
19618 | { | |
19619 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 19620 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
19621 | } |
19622 | else | |
19623 | { | |
19624 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 19625 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 19626 | } |
2df3850c JM |
19627 | } |
19628 | ||
c906108c SS |
19629 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
19630 | ||
19631 | static struct type * | |
e7c27a73 | 19632 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19633 | { |
c906108c | 19634 | struct attribute *type_attr; |
c906108c | 19635 | |
e142c38c | 19636 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
19637 | if (!type_attr) |
19638 | { | |
19639 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 19640 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 19641 | } |
348e048f | 19642 | |
673bfd45 | 19643 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19644 | } |
19645 | ||
b4ba55a1 JB |
19646 | /* True iff CU's producer generates GNAT Ada auxiliary information |
19647 | that allows to find parallel types through that information instead | |
19648 | of having to do expensive parallel lookups by type name. */ | |
19649 | ||
19650 | static int | |
19651 | need_gnat_info (struct dwarf2_cu *cu) | |
19652 | { | |
19653 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
19654 | of GNAT produces this auxiliary information, without any indication | |
19655 | that it is produced. Part of enhancing the FSF version of GNAT | |
19656 | to produce that information will be to put in place an indicator | |
19657 | that we can use in order to determine whether the descriptive type | |
19658 | info is available or not. One suggestion that has been made is | |
19659 | to use a new attribute, attached to the CU die. For now, assume | |
19660 | that the descriptive type info is not available. */ | |
19661 | return 0; | |
19662 | } | |
19663 | ||
b4ba55a1 JB |
19664 | /* Return the auxiliary type of the die in question using its |
19665 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
19666 | attribute is not present. */ | |
19667 | ||
19668 | static struct type * | |
19669 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
19670 | { | |
b4ba55a1 | 19671 | struct attribute *type_attr; |
b4ba55a1 JB |
19672 | |
19673 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
19674 | if (!type_attr) | |
19675 | return NULL; | |
19676 | ||
673bfd45 | 19677 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
19678 | } |
19679 | ||
19680 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
19681 | descriptive type accordingly. */ | |
19682 | ||
19683 | static void | |
19684 | set_descriptive_type (struct type *type, struct die_info *die, | |
19685 | struct dwarf2_cu *cu) | |
19686 | { | |
19687 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
19688 | ||
19689 | if (descriptive_type) | |
19690 | { | |
19691 | ALLOCATE_GNAT_AUX_TYPE (type); | |
19692 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
19693 | } | |
19694 | } | |
19695 | ||
c906108c SS |
19696 | /* Return the containing type of the die in question using its |
19697 | DW_AT_containing_type attribute. */ | |
19698 | ||
19699 | static struct type * | |
e7c27a73 | 19700 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19701 | { |
c906108c | 19702 | struct attribute *type_attr; |
c906108c | 19703 | |
e142c38c | 19704 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
19705 | if (!type_attr) |
19706 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 19707 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 19708 | |
673bfd45 | 19709 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19710 | } |
19711 | ||
ac9ec31b DE |
19712 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
19713 | ||
19714 | static struct type * | |
19715 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
19716 | { | |
19717 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19718 | char *message, *saved; | |
19719 | ||
19720 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 19721 | objfile_name (objfile), |
9c541725 PA |
19722 | to_underlying (cu->header.sect_off), |
19723 | to_underlying (die->sect_off)); | |
224c3ddb SM |
19724 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
19725 | message, strlen (message)); | |
ac9ec31b DE |
19726 | xfree (message); |
19727 | ||
19f392bc | 19728 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
19729 | } |
19730 | ||
673bfd45 | 19731 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
19732 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
19733 | DW_AT_containing_type. | |
673bfd45 DE |
19734 | If there is no type substitute an error marker. */ |
19735 | ||
c906108c | 19736 | static struct type * |
ff39bb5e | 19737 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 19738 | struct dwarf2_cu *cu) |
c906108c | 19739 | { |
bb5ed363 | 19740 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
19741 | struct type *this_type; |
19742 | ||
ac9ec31b DE |
19743 | gdb_assert (attr->name == DW_AT_type |
19744 | || attr->name == DW_AT_GNAT_descriptive_type | |
19745 | || attr->name == DW_AT_containing_type); | |
19746 | ||
673bfd45 DE |
19747 | /* First see if we have it cached. */ |
19748 | ||
36586728 TT |
19749 | if (attr->form == DW_FORM_GNU_ref_alt) |
19750 | { | |
19751 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 19752 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 19753 | |
9c541725 PA |
19754 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
19755 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 19756 | } |
7771576e | 19757 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19758 | { |
9c541725 | 19759 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 19760 | |
9c541725 | 19761 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 19762 | } |
55f1336d | 19763 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19764 | { |
ac9ec31b | 19765 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19766 | |
ac9ec31b | 19767 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19768 | } |
19769 | else | |
19770 | { | |
ac9ec31b DE |
19771 | complaint (&symfile_complaints, |
19772 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19773 | " at 0x%x [in module %s]"), | |
9c541725 | 19774 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 19775 | objfile_name (objfile)); |
ac9ec31b | 19776 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19777 | } |
19778 | ||
19779 | /* If not cached we need to read it in. */ | |
19780 | ||
19781 | if (this_type == NULL) | |
19782 | { | |
ac9ec31b | 19783 | struct die_info *type_die = NULL; |
673bfd45 DE |
19784 | struct dwarf2_cu *type_cu = cu; |
19785 | ||
7771576e | 19786 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19787 | type_die = follow_die_ref (die, attr, &type_cu); |
19788 | if (type_die == NULL) | |
19789 | return build_error_marker_type (cu, die); | |
19790 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19791 | from an inter-CU reference and the type's CU got expanded before |
19792 | ours. */ | |
ac9ec31b | 19793 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19794 | } |
19795 | ||
19796 | /* If we still don't have a type use an error marker. */ | |
19797 | ||
19798 | if (this_type == NULL) | |
ac9ec31b | 19799 | return build_error_marker_type (cu, die); |
673bfd45 | 19800 | |
f792889a | 19801 | return this_type; |
c906108c SS |
19802 | } |
19803 | ||
673bfd45 DE |
19804 | /* Return the type in DIE, CU. |
19805 | Returns NULL for invalid types. | |
19806 | ||
02142a6c | 19807 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19808 | and only reads the die in if necessary. |
19809 | ||
19810 | NOTE: This can be called when reading in partial or full symbols. */ | |
19811 | ||
f792889a | 19812 | static struct type * |
e7c27a73 | 19813 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19814 | { |
f792889a DJ |
19815 | struct type *this_type; |
19816 | ||
19817 | this_type = get_die_type (die, cu); | |
19818 | if (this_type) | |
19819 | return this_type; | |
19820 | ||
673bfd45 DE |
19821 | return read_type_die_1 (die, cu); |
19822 | } | |
19823 | ||
19824 | /* Read the type in DIE, CU. | |
19825 | Returns NULL for invalid types. */ | |
19826 | ||
19827 | static struct type * | |
19828 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19829 | { | |
19830 | struct type *this_type = NULL; | |
19831 | ||
c906108c SS |
19832 | switch (die->tag) |
19833 | { | |
19834 | case DW_TAG_class_type: | |
680b30c7 | 19835 | case DW_TAG_interface_type: |
c906108c SS |
19836 | case DW_TAG_structure_type: |
19837 | case DW_TAG_union_type: | |
f792889a | 19838 | this_type = read_structure_type (die, cu); |
c906108c SS |
19839 | break; |
19840 | case DW_TAG_enumeration_type: | |
f792889a | 19841 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19842 | break; |
19843 | case DW_TAG_subprogram: | |
19844 | case DW_TAG_subroutine_type: | |
edb3359d | 19845 | case DW_TAG_inlined_subroutine: |
f792889a | 19846 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19847 | break; |
19848 | case DW_TAG_array_type: | |
f792889a | 19849 | this_type = read_array_type (die, cu); |
c906108c | 19850 | break; |
72019c9c | 19851 | case DW_TAG_set_type: |
f792889a | 19852 | this_type = read_set_type (die, cu); |
72019c9c | 19853 | break; |
c906108c | 19854 | case DW_TAG_pointer_type: |
f792889a | 19855 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19856 | break; |
19857 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19858 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19859 | break; |
19860 | case DW_TAG_reference_type: | |
4297a3f0 AV |
19861 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
19862 | break; | |
19863 | case DW_TAG_rvalue_reference_type: | |
19864 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
19865 | break; |
19866 | case DW_TAG_const_type: | |
f792889a | 19867 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19868 | break; |
19869 | case DW_TAG_volatile_type: | |
f792889a | 19870 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19871 | break; |
06d66ee9 TT |
19872 | case DW_TAG_restrict_type: |
19873 | this_type = read_tag_restrict_type (die, cu); | |
19874 | break; | |
c906108c | 19875 | case DW_TAG_string_type: |
f792889a | 19876 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19877 | break; |
19878 | case DW_TAG_typedef: | |
f792889a | 19879 | this_type = read_typedef (die, cu); |
c906108c | 19880 | break; |
a02abb62 | 19881 | case DW_TAG_subrange_type: |
f792889a | 19882 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19883 | break; |
c906108c | 19884 | case DW_TAG_base_type: |
f792889a | 19885 | this_type = read_base_type (die, cu); |
c906108c | 19886 | break; |
81a17f79 | 19887 | case DW_TAG_unspecified_type: |
f792889a | 19888 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19889 | break; |
0114d602 DJ |
19890 | case DW_TAG_namespace: |
19891 | this_type = read_namespace_type (die, cu); | |
19892 | break; | |
f55ee35c JK |
19893 | case DW_TAG_module: |
19894 | this_type = read_module_type (die, cu); | |
19895 | break; | |
a2c2acaf MW |
19896 | case DW_TAG_atomic_type: |
19897 | this_type = read_tag_atomic_type (die, cu); | |
19898 | break; | |
c906108c | 19899 | default: |
3e43a32a MS |
19900 | complaint (&symfile_complaints, |
19901 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19902 | dwarf_tag_name (die->tag)); |
c906108c SS |
19903 | break; |
19904 | } | |
63d06c5c | 19905 | |
f792889a | 19906 | return this_type; |
63d06c5c DC |
19907 | } |
19908 | ||
abc72ce4 DE |
19909 | /* See if we can figure out if the class lives in a namespace. We do |
19910 | this by looking for a member function; its demangled name will | |
19911 | contain namespace info, if there is any. | |
19912 | Return the computed name or NULL. | |
19913 | Space for the result is allocated on the objfile's obstack. | |
19914 | This is the full-die version of guess_partial_die_structure_name. | |
19915 | In this case we know DIE has no useful parent. */ | |
19916 | ||
19917 | static char * | |
19918 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19919 | { | |
19920 | struct die_info *spec_die; | |
19921 | struct dwarf2_cu *spec_cu; | |
19922 | struct die_info *child; | |
19923 | ||
19924 | spec_cu = cu; | |
19925 | spec_die = die_specification (die, &spec_cu); | |
19926 | if (spec_die != NULL) | |
19927 | { | |
19928 | die = spec_die; | |
19929 | cu = spec_cu; | |
19930 | } | |
19931 | ||
19932 | for (child = die->child; | |
19933 | child != NULL; | |
19934 | child = child->sibling) | |
19935 | { | |
19936 | if (child->tag == DW_TAG_subprogram) | |
19937 | { | |
73b9be8b | 19938 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 19939 | |
7d45c7c3 | 19940 | if (linkage_name != NULL) |
abc72ce4 DE |
19941 | { |
19942 | char *actual_name | |
19943 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19944 | linkage_name); |
abc72ce4 DE |
19945 | char *name = NULL; |
19946 | ||
19947 | if (actual_name != NULL) | |
19948 | { | |
15d034d0 | 19949 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19950 | |
19951 | if (die_name != NULL | |
19952 | && strcmp (die_name, actual_name) != 0) | |
19953 | { | |
19954 | /* Strip off the class name from the full name. | |
19955 | We want the prefix. */ | |
19956 | int die_name_len = strlen (die_name); | |
19957 | int actual_name_len = strlen (actual_name); | |
19958 | ||
19959 | /* Test for '::' as a sanity check. */ | |
19960 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19961 | && actual_name[actual_name_len |
19962 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19963 | name = (char *) obstack_copy0 ( |
19964 | &cu->objfile->per_bfd->storage_obstack, | |
19965 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19966 | } |
19967 | } | |
19968 | xfree (actual_name); | |
19969 | return name; | |
19970 | } | |
19971 | } | |
19972 | } | |
19973 | ||
19974 | return NULL; | |
19975 | } | |
19976 | ||
96408a79 SA |
19977 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19978 | prefix part in such case. See | |
19979 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19980 | ||
a121b7c1 | 19981 | static const char * |
96408a79 SA |
19982 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
19983 | { | |
19984 | struct attribute *attr; | |
e6a959d6 | 19985 | const char *base; |
96408a79 SA |
19986 | |
19987 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19988 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19989 | return NULL; | |
19990 | ||
7d45c7c3 | 19991 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19992 | return NULL; |
19993 | ||
73b9be8b | 19994 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
19995 | if (attr == NULL || DW_STRING (attr) == NULL) |
19996 | return NULL; | |
19997 | ||
19998 | /* dwarf2_name had to be already called. */ | |
19999 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20000 | ||
20001 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20002 | base = strrchr (DW_STRING (attr), ':'); | |
20003 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20004 | return ""; | |
20005 | ||
224c3ddb SM |
20006 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20007 | DW_STRING (attr), | |
20008 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20009 | } |
20010 | ||
fdde2d81 | 20011 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20012 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20013 | |
0114d602 DJ |
20014 | For example, if we're within the method foo() in the following |
20015 | code: | |
20016 | ||
20017 | namespace N { | |
20018 | class C { | |
20019 | void foo () { | |
20020 | } | |
20021 | }; | |
20022 | } | |
20023 | ||
20024 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20025 | |
0d5cff50 | 20026 | static const char * |
e142c38c | 20027 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20028 | { |
0114d602 DJ |
20029 | struct die_info *parent, *spec_die; |
20030 | struct dwarf2_cu *spec_cu; | |
20031 | struct type *parent_type; | |
a121b7c1 | 20032 | const char *retval; |
63d06c5c | 20033 | |
9c37b5ae | 20034 | if (cu->language != language_cplus |
c44af4eb TT |
20035 | && cu->language != language_fortran && cu->language != language_d |
20036 | && cu->language != language_rust) | |
0114d602 DJ |
20037 | return ""; |
20038 | ||
96408a79 SA |
20039 | retval = anonymous_struct_prefix (die, cu); |
20040 | if (retval) | |
20041 | return retval; | |
20042 | ||
0114d602 DJ |
20043 | /* We have to be careful in the presence of DW_AT_specification. |
20044 | For example, with GCC 3.4, given the code | |
20045 | ||
20046 | namespace N { | |
20047 | void foo() { | |
20048 | // Definition of N::foo. | |
20049 | } | |
20050 | } | |
20051 | ||
20052 | then we'll have a tree of DIEs like this: | |
20053 | ||
20054 | 1: DW_TAG_compile_unit | |
20055 | 2: DW_TAG_namespace // N | |
20056 | 3: DW_TAG_subprogram // declaration of N::foo | |
20057 | 4: DW_TAG_subprogram // definition of N::foo | |
20058 | DW_AT_specification // refers to die #3 | |
20059 | ||
20060 | Thus, when processing die #4, we have to pretend that we're in | |
20061 | the context of its DW_AT_specification, namely the contex of die | |
20062 | #3. */ | |
20063 | spec_cu = cu; | |
20064 | spec_die = die_specification (die, &spec_cu); | |
20065 | if (spec_die == NULL) | |
20066 | parent = die->parent; | |
20067 | else | |
63d06c5c | 20068 | { |
0114d602 DJ |
20069 | parent = spec_die->parent; |
20070 | cu = spec_cu; | |
63d06c5c | 20071 | } |
0114d602 DJ |
20072 | |
20073 | if (parent == NULL) | |
20074 | return ""; | |
98bfdba5 PA |
20075 | else if (parent->building_fullname) |
20076 | { | |
20077 | const char *name; | |
20078 | const char *parent_name; | |
20079 | ||
20080 | /* It has been seen on RealView 2.2 built binaries, | |
20081 | DW_TAG_template_type_param types actually _defined_ as | |
20082 | children of the parent class: | |
20083 | ||
20084 | enum E {}; | |
20085 | template class <class Enum> Class{}; | |
20086 | Class<enum E> class_e; | |
20087 | ||
20088 | 1: DW_TAG_class_type (Class) | |
20089 | 2: DW_TAG_enumeration_type (E) | |
20090 | 3: DW_TAG_enumerator (enum1:0) | |
20091 | 3: DW_TAG_enumerator (enum2:1) | |
20092 | ... | |
20093 | 2: DW_TAG_template_type_param | |
20094 | DW_AT_type DW_FORM_ref_udata (E) | |
20095 | ||
20096 | Besides being broken debug info, it can put GDB into an | |
20097 | infinite loop. Consider: | |
20098 | ||
20099 | When we're building the full name for Class<E>, we'll start | |
20100 | at Class, and go look over its template type parameters, | |
20101 | finding E. We'll then try to build the full name of E, and | |
20102 | reach here. We're now trying to build the full name of E, | |
20103 | and look over the parent DIE for containing scope. In the | |
20104 | broken case, if we followed the parent DIE of E, we'd again | |
20105 | find Class, and once again go look at its template type | |
20106 | arguments, etc., etc. Simply don't consider such parent die | |
20107 | as source-level parent of this die (it can't be, the language | |
20108 | doesn't allow it), and break the loop here. */ | |
20109 | name = dwarf2_name (die, cu); | |
20110 | parent_name = dwarf2_name (parent, cu); | |
20111 | complaint (&symfile_complaints, | |
20112 | _("template param type '%s' defined within parent '%s'"), | |
20113 | name ? name : "<unknown>", | |
20114 | parent_name ? parent_name : "<unknown>"); | |
20115 | return ""; | |
20116 | } | |
63d06c5c | 20117 | else |
0114d602 DJ |
20118 | switch (parent->tag) |
20119 | { | |
63d06c5c | 20120 | case DW_TAG_namespace: |
0114d602 | 20121 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20122 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20123 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20124 | Work around this problem here. */ | |
20125 | if (cu->language == language_cplus | |
20126 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20127 | return ""; | |
0114d602 DJ |
20128 | /* We give a name to even anonymous namespaces. */ |
20129 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20130 | case DW_TAG_class_type: |
680b30c7 | 20131 | case DW_TAG_interface_type: |
63d06c5c | 20132 | case DW_TAG_structure_type: |
0114d602 | 20133 | case DW_TAG_union_type: |
f55ee35c | 20134 | case DW_TAG_module: |
0114d602 DJ |
20135 | parent_type = read_type_die (parent, cu); |
20136 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20137 | return TYPE_TAG_NAME (parent_type); | |
20138 | else | |
20139 | /* An anonymous structure is only allowed non-static data | |
20140 | members; no typedefs, no member functions, et cetera. | |
20141 | So it does not need a prefix. */ | |
20142 | return ""; | |
abc72ce4 | 20143 | case DW_TAG_compile_unit: |
95554aad | 20144 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20145 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20146 | if (cu->language == language_cplus | |
8b70b953 | 20147 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20148 | && die->child != NULL |
20149 | && (die->tag == DW_TAG_class_type | |
20150 | || die->tag == DW_TAG_structure_type | |
20151 | || die->tag == DW_TAG_union_type)) | |
20152 | { | |
20153 | char *name = guess_full_die_structure_name (die, cu); | |
20154 | if (name != NULL) | |
20155 | return name; | |
20156 | } | |
20157 | return ""; | |
3d567982 TT |
20158 | case DW_TAG_enumeration_type: |
20159 | parent_type = read_type_die (parent, cu); | |
20160 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20161 | { | |
20162 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20163 | return TYPE_TAG_NAME (parent_type); | |
20164 | return ""; | |
20165 | } | |
20166 | /* Fall through. */ | |
63d06c5c | 20167 | default: |
8176b9b8 | 20168 | return determine_prefix (parent, cu); |
63d06c5c | 20169 | } |
63d06c5c DC |
20170 | } |
20171 | ||
3e43a32a MS |
20172 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20173 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20174 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20175 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
20176 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 20177 | |
f55ee35c | 20178 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
20179 | |
20180 | static char * | |
f55ee35c JK |
20181 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
20182 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 20183 | { |
f55ee35c | 20184 | const char *lead = ""; |
5c315b68 | 20185 | const char *sep; |
63d06c5c | 20186 | |
3e43a32a MS |
20187 | if (suffix == NULL || suffix[0] == '\0' |
20188 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 20189 | sep = ""; |
45280282 IB |
20190 | else if (cu->language == language_d) |
20191 | { | |
20192 | /* For D, the 'main' function could be defined in any module, but it | |
20193 | should never be prefixed. */ | |
20194 | if (strcmp (suffix, "D main") == 0) | |
20195 | { | |
20196 | prefix = ""; | |
20197 | sep = ""; | |
20198 | } | |
20199 | else | |
20200 | sep = "."; | |
20201 | } | |
f55ee35c JK |
20202 | else if (cu->language == language_fortran && physname) |
20203 | { | |
20204 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
20205 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
20206 | ||
20207 | lead = "__"; | |
20208 | sep = "_MOD_"; | |
20209 | } | |
987504bb JJ |
20210 | else |
20211 | sep = "::"; | |
63d06c5c | 20212 | |
6dd47d34 DE |
20213 | if (prefix == NULL) |
20214 | prefix = ""; | |
20215 | if (suffix == NULL) | |
20216 | suffix = ""; | |
20217 | ||
987504bb JJ |
20218 | if (obs == NULL) |
20219 | { | |
3e43a32a | 20220 | char *retval |
224c3ddb SM |
20221 | = ((char *) |
20222 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 20223 | |
f55ee35c JK |
20224 | strcpy (retval, lead); |
20225 | strcat (retval, prefix); | |
6dd47d34 DE |
20226 | strcat (retval, sep); |
20227 | strcat (retval, suffix); | |
63d06c5c DC |
20228 | return retval; |
20229 | } | |
987504bb JJ |
20230 | else |
20231 | { | |
20232 | /* We have an obstack. */ | |
f55ee35c | 20233 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 20234 | } |
63d06c5c DC |
20235 | } |
20236 | ||
c906108c SS |
20237 | /* Return sibling of die, NULL if no sibling. */ |
20238 | ||
f9aca02d | 20239 | static struct die_info * |
fba45db2 | 20240 | sibling_die (struct die_info *die) |
c906108c | 20241 | { |
639d11d3 | 20242 | return die->sibling; |
c906108c SS |
20243 | } |
20244 | ||
71c25dea TT |
20245 | /* Get name of a die, return NULL if not found. */ |
20246 | ||
15d034d0 TT |
20247 | static const char * |
20248 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
20249 | struct obstack *obstack) |
20250 | { | |
20251 | if (name && cu->language == language_cplus) | |
20252 | { | |
2f408ecb | 20253 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 20254 | |
2f408ecb | 20255 | if (!canon_name.empty ()) |
71c25dea | 20256 | { |
2f408ecb PA |
20257 | if (canon_name != name) |
20258 | name = (const char *) obstack_copy0 (obstack, | |
20259 | canon_name.c_str (), | |
20260 | canon_name.length ()); | |
71c25dea TT |
20261 | } |
20262 | } | |
20263 | ||
20264 | return name; | |
c906108c SS |
20265 | } |
20266 | ||
96553a0c DE |
20267 | /* Get name of a die, return NULL if not found. |
20268 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 20269 | |
15d034d0 | 20270 | static const char * |
e142c38c | 20271 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
20272 | { |
20273 | struct attribute *attr; | |
20274 | ||
e142c38c | 20275 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 20276 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 20277 | && die->tag != DW_TAG_namespace |
53832f31 TT |
20278 | && die->tag != DW_TAG_class_type |
20279 | && die->tag != DW_TAG_interface_type | |
20280 | && die->tag != DW_TAG_structure_type | |
20281 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
20282 | return NULL; |
20283 | ||
20284 | switch (die->tag) | |
20285 | { | |
20286 | case DW_TAG_compile_unit: | |
95554aad | 20287 | case DW_TAG_partial_unit: |
71c25dea TT |
20288 | /* Compilation units have a DW_AT_name that is a filename, not |
20289 | a source language identifier. */ | |
20290 | case DW_TAG_enumeration_type: | |
20291 | case DW_TAG_enumerator: | |
20292 | /* These tags always have simple identifiers already; no need | |
20293 | to canonicalize them. */ | |
20294 | return DW_STRING (attr); | |
907af001 | 20295 | |
96553a0c DE |
20296 | case DW_TAG_namespace: |
20297 | if (attr != NULL && DW_STRING (attr) != NULL) | |
20298 | return DW_STRING (attr); | |
20299 | return CP_ANONYMOUS_NAMESPACE_STR; | |
20300 | ||
907af001 UW |
20301 | case DW_TAG_class_type: |
20302 | case DW_TAG_interface_type: | |
20303 | case DW_TAG_structure_type: | |
20304 | case DW_TAG_union_type: | |
20305 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
20306 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
20307 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
20308 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 20309 | if (attr && DW_STRING (attr) |
61012eef GB |
20310 | && (startswith (DW_STRING (attr), "._") |
20311 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 20312 | return NULL; |
53832f31 TT |
20313 | |
20314 | /* GCC might emit a nameless typedef that has a linkage name. See | |
20315 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20316 | if (!attr || DW_STRING (attr) == NULL) | |
20317 | { | |
df5c6c50 | 20318 | char *demangled = NULL; |
53832f31 | 20319 | |
73b9be8b | 20320 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
20321 | if (attr == NULL || DW_STRING (attr) == NULL) |
20322 | return NULL; | |
20323 | ||
df5c6c50 JK |
20324 | /* Avoid demangling DW_STRING (attr) the second time on a second |
20325 | call for the same DIE. */ | |
20326 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 20327 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
20328 | |
20329 | if (demangled) | |
20330 | { | |
e6a959d6 | 20331 | const char *base; |
96408a79 | 20332 | |
53832f31 | 20333 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 20334 | DW_STRING (attr) |
224c3ddb SM |
20335 | = ((const char *) |
20336 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
20337 | demangled, strlen (demangled))); | |
53832f31 TT |
20338 | DW_STRING_IS_CANONICAL (attr) = 1; |
20339 | xfree (demangled); | |
96408a79 SA |
20340 | |
20341 | /* Strip any leading namespaces/classes, keep only the base name. | |
20342 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
20343 | base = strrchr (DW_STRING (attr), ':'); | |
20344 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
20345 | return &base[1]; | |
20346 | else | |
20347 | return DW_STRING (attr); | |
53832f31 TT |
20348 | } |
20349 | } | |
907af001 UW |
20350 | break; |
20351 | ||
71c25dea | 20352 | default: |
907af001 UW |
20353 | break; |
20354 | } | |
20355 | ||
20356 | if (!DW_STRING_IS_CANONICAL (attr)) | |
20357 | { | |
20358 | DW_STRING (attr) | |
20359 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 20360 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 20361 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 20362 | } |
907af001 | 20363 | return DW_STRING (attr); |
9219021c DC |
20364 | } |
20365 | ||
20366 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
20367 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
20368 | containing the return value on output. */ | |
9219021c DC |
20369 | |
20370 | static struct die_info * | |
f2f0e013 | 20371 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
20372 | { |
20373 | struct attribute *attr; | |
9219021c | 20374 | |
f2f0e013 | 20375 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
20376 | if (attr == NULL) |
20377 | return NULL; | |
20378 | ||
f2f0e013 | 20379 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
20380 | } |
20381 | ||
c906108c SS |
20382 | /* Convert a DIE tag into its string name. */ |
20383 | ||
f39c6ffd | 20384 | static const char * |
aa1ee363 | 20385 | dwarf_tag_name (unsigned tag) |
c906108c | 20386 | { |
f39c6ffd TT |
20387 | const char *name = get_DW_TAG_name (tag); |
20388 | ||
20389 | if (name == NULL) | |
20390 | return "DW_TAG_<unknown>"; | |
20391 | ||
20392 | return name; | |
c906108c SS |
20393 | } |
20394 | ||
20395 | /* Convert a DWARF attribute code into its string name. */ | |
20396 | ||
f39c6ffd | 20397 | static const char * |
aa1ee363 | 20398 | dwarf_attr_name (unsigned attr) |
c906108c | 20399 | { |
f39c6ffd TT |
20400 | const char *name; |
20401 | ||
c764a876 | 20402 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
20403 | if (attr == DW_AT_MIPS_fde) |
20404 | return "DW_AT_MIPS_fde"; | |
20405 | #else | |
20406 | if (attr == DW_AT_HP_block_index) | |
20407 | return "DW_AT_HP_block_index"; | |
c764a876 | 20408 | #endif |
f39c6ffd TT |
20409 | |
20410 | name = get_DW_AT_name (attr); | |
20411 | ||
20412 | if (name == NULL) | |
20413 | return "DW_AT_<unknown>"; | |
20414 | ||
20415 | return name; | |
c906108c SS |
20416 | } |
20417 | ||
20418 | /* Convert a DWARF value form code into its string name. */ | |
20419 | ||
f39c6ffd | 20420 | static const char * |
aa1ee363 | 20421 | dwarf_form_name (unsigned form) |
c906108c | 20422 | { |
f39c6ffd TT |
20423 | const char *name = get_DW_FORM_name (form); |
20424 | ||
20425 | if (name == NULL) | |
20426 | return "DW_FORM_<unknown>"; | |
20427 | ||
20428 | return name; | |
c906108c SS |
20429 | } |
20430 | ||
a121b7c1 | 20431 | static const char * |
fba45db2 | 20432 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
20433 | { |
20434 | if (mybool) | |
20435 | return "TRUE"; | |
20436 | else | |
20437 | return "FALSE"; | |
20438 | } | |
20439 | ||
20440 | /* Convert a DWARF type code into its string name. */ | |
20441 | ||
f39c6ffd | 20442 | static const char * |
aa1ee363 | 20443 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 20444 | { |
f39c6ffd | 20445 | const char *name = get_DW_ATE_name (enc); |
c906108c | 20446 | |
f39c6ffd TT |
20447 | if (name == NULL) |
20448 | return "DW_ATE_<unknown>"; | |
c906108c | 20449 | |
f39c6ffd | 20450 | return name; |
c906108c | 20451 | } |
c906108c | 20452 | |
f9aca02d | 20453 | static void |
d97bc12b | 20454 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
20455 | { |
20456 | unsigned int i; | |
20457 | ||
d97bc12b DE |
20458 | print_spaces (indent, f); |
20459 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
20460 | dwarf_tag_name (die->tag), die->abbrev, |
20461 | to_underlying (die->sect_off)); | |
d97bc12b DE |
20462 | |
20463 | if (die->parent != NULL) | |
20464 | { | |
20465 | print_spaces (indent, f); | |
20466 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 20467 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
20468 | } |
20469 | ||
20470 | print_spaces (indent, f); | |
20471 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 20472 | dwarf_bool_name (die->child != NULL)); |
c906108c | 20473 | |
d97bc12b DE |
20474 | print_spaces (indent, f); |
20475 | fprintf_unfiltered (f, " attributes:\n"); | |
20476 | ||
c906108c SS |
20477 | for (i = 0; i < die->num_attrs; ++i) |
20478 | { | |
d97bc12b DE |
20479 | print_spaces (indent, f); |
20480 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
20481 | dwarf_attr_name (die->attrs[i].name), |
20482 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 20483 | |
c906108c SS |
20484 | switch (die->attrs[i].form) |
20485 | { | |
c906108c | 20486 | case DW_FORM_addr: |
3019eac3 | 20487 | case DW_FORM_GNU_addr_index: |
d97bc12b | 20488 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 20489 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
20490 | break; |
20491 | case DW_FORM_block2: | |
20492 | case DW_FORM_block4: | |
20493 | case DW_FORM_block: | |
20494 | case DW_FORM_block1: | |
56eb65bd SP |
20495 | fprintf_unfiltered (f, "block: size %s", |
20496 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 20497 | break; |
2dc7f7b3 | 20498 | case DW_FORM_exprloc: |
56eb65bd SP |
20499 | fprintf_unfiltered (f, "expression: size %s", |
20500 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 20501 | break; |
0224619f JK |
20502 | case DW_FORM_data16: |
20503 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
20504 | break; | |
4568ecf9 DE |
20505 | case DW_FORM_ref_addr: |
20506 | fprintf_unfiltered (f, "ref address: "); | |
20507 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20508 | break; | |
36586728 TT |
20509 | case DW_FORM_GNU_ref_alt: |
20510 | fprintf_unfiltered (f, "alt ref address: "); | |
20511 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20512 | break; | |
10b3939b DJ |
20513 | case DW_FORM_ref1: |
20514 | case DW_FORM_ref2: | |
20515 | case DW_FORM_ref4: | |
4568ecf9 DE |
20516 | case DW_FORM_ref8: |
20517 | case DW_FORM_ref_udata: | |
d97bc12b | 20518 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 20519 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 20520 | break; |
c906108c SS |
20521 | case DW_FORM_data1: |
20522 | case DW_FORM_data2: | |
20523 | case DW_FORM_data4: | |
ce5d95e1 | 20524 | case DW_FORM_data8: |
c906108c SS |
20525 | case DW_FORM_udata: |
20526 | case DW_FORM_sdata: | |
43bbcdc2 PH |
20527 | fprintf_unfiltered (f, "constant: %s", |
20528 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 20529 | break; |
2dc7f7b3 TT |
20530 | case DW_FORM_sec_offset: |
20531 | fprintf_unfiltered (f, "section offset: %s", | |
20532 | pulongest (DW_UNSND (&die->attrs[i]))); | |
20533 | break; | |
55f1336d | 20534 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
20535 | fprintf_unfiltered (f, "signature: %s", |
20536 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 20537 | break; |
c906108c | 20538 | case DW_FORM_string: |
4bdf3d34 | 20539 | case DW_FORM_strp: |
43988095 | 20540 | case DW_FORM_line_strp: |
3019eac3 | 20541 | case DW_FORM_GNU_str_index: |
36586728 | 20542 | case DW_FORM_GNU_strp_alt: |
8285870a | 20543 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 20544 | DW_STRING (&die->attrs[i]) |
8285870a JK |
20545 | ? DW_STRING (&die->attrs[i]) : "", |
20546 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
20547 | break; |
20548 | case DW_FORM_flag: | |
20549 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 20550 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 20551 | else |
d97bc12b | 20552 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 20553 | break; |
2dc7f7b3 TT |
20554 | case DW_FORM_flag_present: |
20555 | fprintf_unfiltered (f, "flag: TRUE"); | |
20556 | break; | |
a8329558 | 20557 | case DW_FORM_indirect: |
0963b4bd MS |
20558 | /* The reader will have reduced the indirect form to |
20559 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
20560 | fprintf_unfiltered (f, |
20561 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 20562 | break; |
663c44ac JK |
20563 | case DW_FORM_implicit_const: |
20564 | fprintf_unfiltered (f, "constant: %s", | |
20565 | plongest (DW_SND (&die->attrs[i]))); | |
20566 | break; | |
c906108c | 20567 | default: |
d97bc12b | 20568 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 20569 | die->attrs[i].form); |
d97bc12b | 20570 | break; |
c906108c | 20571 | } |
d97bc12b | 20572 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
20573 | } |
20574 | } | |
20575 | ||
f9aca02d | 20576 | static void |
d97bc12b | 20577 | dump_die_for_error (struct die_info *die) |
c906108c | 20578 | { |
d97bc12b DE |
20579 | dump_die_shallow (gdb_stderr, 0, die); |
20580 | } | |
20581 | ||
20582 | static void | |
20583 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
20584 | { | |
20585 | int indent = level * 4; | |
20586 | ||
20587 | gdb_assert (die != NULL); | |
20588 | ||
20589 | if (level >= max_level) | |
20590 | return; | |
20591 | ||
20592 | dump_die_shallow (f, indent, die); | |
20593 | ||
20594 | if (die->child != NULL) | |
c906108c | 20595 | { |
d97bc12b DE |
20596 | print_spaces (indent, f); |
20597 | fprintf_unfiltered (f, " Children:"); | |
20598 | if (level + 1 < max_level) | |
20599 | { | |
20600 | fprintf_unfiltered (f, "\n"); | |
20601 | dump_die_1 (f, level + 1, max_level, die->child); | |
20602 | } | |
20603 | else | |
20604 | { | |
3e43a32a MS |
20605 | fprintf_unfiltered (f, |
20606 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
20607 | } |
20608 | } | |
20609 | ||
20610 | if (die->sibling != NULL && level > 0) | |
20611 | { | |
20612 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
20613 | } |
20614 | } | |
20615 | ||
d97bc12b DE |
20616 | /* This is called from the pdie macro in gdbinit.in. |
20617 | It's not static so gcc will keep a copy callable from gdb. */ | |
20618 | ||
20619 | void | |
20620 | dump_die (struct die_info *die, int max_level) | |
20621 | { | |
20622 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
20623 | } | |
20624 | ||
f9aca02d | 20625 | static void |
51545339 | 20626 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20627 | { |
51545339 | 20628 | void **slot; |
c906108c | 20629 | |
9c541725 PA |
20630 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
20631 | to_underlying (die->sect_off), | |
b64f50a1 | 20632 | INSERT); |
51545339 DJ |
20633 | |
20634 | *slot = die; | |
c906108c SS |
20635 | } |
20636 | ||
b64f50a1 JK |
20637 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
20638 | required kind. */ | |
20639 | ||
20640 | static sect_offset | |
ff39bb5e | 20641 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 20642 | { |
7771576e | 20643 | if (attr_form_is_ref (attr)) |
9c541725 | 20644 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
20645 | |
20646 | complaint (&symfile_complaints, | |
20647 | _("unsupported die ref attribute form: '%s'"), | |
20648 | dwarf_form_name (attr->form)); | |
9c541725 | 20649 | return {}; |
c906108c SS |
20650 | } |
20651 | ||
43bbcdc2 PH |
20652 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
20653 | * the value held by the attribute is not constant. */ | |
a02abb62 | 20654 | |
43bbcdc2 | 20655 | static LONGEST |
ff39bb5e | 20656 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 20657 | { |
663c44ac | 20658 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
20659 | return DW_SND (attr); |
20660 | else if (attr->form == DW_FORM_udata | |
20661 | || attr->form == DW_FORM_data1 | |
20662 | || attr->form == DW_FORM_data2 | |
20663 | || attr->form == DW_FORM_data4 | |
20664 | || attr->form == DW_FORM_data8) | |
20665 | return DW_UNSND (attr); | |
20666 | else | |
20667 | { | |
0224619f | 20668 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
20669 | complaint (&symfile_complaints, |
20670 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
20671 | dwarf_form_name (attr->form)); |
20672 | return default_value; | |
20673 | } | |
20674 | } | |
20675 | ||
348e048f DE |
20676 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
20677 | On entry *REF_CU is the CU of SRC_DIE. | |
20678 | On exit *REF_CU is the CU of the result. */ | |
20679 | ||
20680 | static struct die_info * | |
ff39bb5e | 20681 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
20682 | struct dwarf2_cu **ref_cu) |
20683 | { | |
20684 | struct die_info *die; | |
20685 | ||
7771576e | 20686 | if (attr_form_is_ref (attr)) |
348e048f | 20687 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 20688 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
20689 | die = follow_die_sig (src_die, attr, ref_cu); |
20690 | else | |
20691 | { | |
20692 | dump_die_for_error (src_die); | |
20693 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 20694 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
20695 | } |
20696 | ||
20697 | return die; | |
03dd20cc DJ |
20698 | } |
20699 | ||
5c631832 | 20700 | /* Follow reference OFFSET. |
673bfd45 DE |
20701 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
20702 | On exit *REF_CU is the CU of the result. | |
20703 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 20704 | |
f9aca02d | 20705 | static struct die_info * |
9c541725 | 20706 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 20707 | struct dwarf2_cu **ref_cu) |
c906108c | 20708 | { |
10b3939b | 20709 | struct die_info temp_die; |
f2f0e013 | 20710 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 20711 | |
348e048f DE |
20712 | gdb_assert (cu->per_cu != NULL); |
20713 | ||
98bfdba5 PA |
20714 | target_cu = cu; |
20715 | ||
3019eac3 | 20716 | if (cu->per_cu->is_debug_types) |
348e048f DE |
20717 | { |
20718 | /* .debug_types CUs cannot reference anything outside their CU. | |
20719 | If they need to, they have to reference a signatured type via | |
55f1336d | 20720 | DW_FORM_ref_sig8. */ |
9c541725 | 20721 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 20722 | return NULL; |
348e048f | 20723 | } |
36586728 | 20724 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 20725 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
20726 | { |
20727 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20728 | |
9c541725 | 20729 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 20730 | cu->objfile); |
03dd20cc DJ |
20731 | |
20732 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20733 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20734 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20735 | |
10b3939b DJ |
20736 | target_cu = per_cu->cu; |
20737 | } | |
98bfdba5 PA |
20738 | else if (cu->dies == NULL) |
20739 | { | |
20740 | /* We're loading full DIEs during partial symbol reading. */ | |
20741 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20742 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20743 | } |
c906108c | 20744 | |
f2f0e013 | 20745 | *ref_cu = target_cu; |
9c541725 | 20746 | temp_die.sect_off = sect_off; |
9a3c8263 | 20747 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
20748 | &temp_die, |
20749 | to_underlying (sect_off)); | |
5c631832 | 20750 | } |
10b3939b | 20751 | |
5c631832 JK |
20752 | /* Follow reference attribute ATTR of SRC_DIE. |
20753 | On entry *REF_CU is the CU of SRC_DIE. | |
20754 | On exit *REF_CU is the CU of the result. */ | |
20755 | ||
20756 | static struct die_info * | |
ff39bb5e | 20757 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20758 | struct dwarf2_cu **ref_cu) |
20759 | { | |
9c541725 | 20760 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20761 | struct dwarf2_cu *cu = *ref_cu; |
20762 | struct die_info *die; | |
20763 | ||
9c541725 | 20764 | die = follow_die_offset (sect_off, |
36586728 TT |
20765 | (attr->form == DW_FORM_GNU_ref_alt |
20766 | || cu->per_cu->is_dwz), | |
20767 | ref_cu); | |
5c631832 JK |
20768 | if (!die) |
20769 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20770 | "at 0x%x [in module %s]"), | |
9c541725 | 20771 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 20772 | objfile_name (cu->objfile)); |
348e048f | 20773 | |
5c631832 JK |
20774 | return die; |
20775 | } | |
20776 | ||
9c541725 | 20777 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
20778 | Returned value is intended for DW_OP_call*. Returned |
20779 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20780 | |
20781 | struct dwarf2_locexpr_baton | |
9c541725 | 20782 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
20783 | struct dwarf2_per_cu_data *per_cu, |
20784 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20785 | void *baton) | |
5c631832 | 20786 | { |
918dd910 | 20787 | struct dwarf2_cu *cu; |
5c631832 JK |
20788 | struct die_info *die; |
20789 | struct attribute *attr; | |
20790 | struct dwarf2_locexpr_baton retval; | |
20791 | ||
8cf6f0b1 TT |
20792 | dw2_setup (per_cu->objfile); |
20793 | ||
918dd910 JK |
20794 | if (per_cu->cu == NULL) |
20795 | load_cu (per_cu); | |
20796 | cu = per_cu->cu; | |
cc12ce38 DE |
20797 | if (cu == NULL) |
20798 | { | |
20799 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20800 | Instead just throw an error, not much else we can do. */ | |
20801 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20802 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20803 | } |
918dd910 | 20804 | |
9c541725 | 20805 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
20806 | if (!die) |
20807 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20808 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20809 | |
20810 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20811 | if (!attr) | |
20812 | { | |
e103e986 JK |
20813 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20814 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20815 | |
e103e986 | 20816 | retval.data = NULL; |
5c631832 JK |
20817 | retval.size = 0; |
20818 | } | |
8cf6f0b1 TT |
20819 | else if (attr_form_is_section_offset (attr)) |
20820 | { | |
20821 | struct dwarf2_loclist_baton loclist_baton; | |
20822 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20823 | size_t size; | |
20824 | ||
20825 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20826 | ||
20827 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20828 | &size, pc); | |
20829 | retval.size = size; | |
20830 | } | |
5c631832 JK |
20831 | else |
20832 | { | |
20833 | if (!attr_form_is_block (attr)) | |
20834 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20835 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 20836 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20837 | |
20838 | retval.data = DW_BLOCK (attr)->data; | |
20839 | retval.size = DW_BLOCK (attr)->size; | |
20840 | } | |
20841 | retval.per_cu = cu->per_cu; | |
918dd910 | 20842 | |
918dd910 JK |
20843 | age_cached_comp_units (); |
20844 | ||
5c631832 | 20845 | return retval; |
348e048f DE |
20846 | } |
20847 | ||
8b9737bf TT |
20848 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20849 | offset. */ | |
20850 | ||
20851 | struct dwarf2_locexpr_baton | |
20852 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20853 | struct dwarf2_per_cu_data *per_cu, | |
20854 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20855 | void *baton) | |
20856 | { | |
9c541725 | 20857 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 20858 | |
9c541725 | 20859 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
20860 | } |
20861 | ||
b6807d98 TT |
20862 | /* Write a constant of a given type as target-ordered bytes into |
20863 | OBSTACK. */ | |
20864 | ||
20865 | static const gdb_byte * | |
20866 | write_constant_as_bytes (struct obstack *obstack, | |
20867 | enum bfd_endian byte_order, | |
20868 | struct type *type, | |
20869 | ULONGEST value, | |
20870 | LONGEST *len) | |
20871 | { | |
20872 | gdb_byte *result; | |
20873 | ||
20874 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20875 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20876 | store_unsigned_integer (result, *len, byte_order, value); |
20877 | ||
20878 | return result; | |
20879 | } | |
20880 | ||
20881 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20882 | pointer to the constant bytes and set LEN to the length of the | |
20883 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20884 | does not have a DW_AT_const_value, return NULL. */ | |
20885 | ||
20886 | const gdb_byte * | |
9c541725 | 20887 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
20888 | struct dwarf2_per_cu_data *per_cu, |
20889 | struct obstack *obstack, | |
20890 | LONGEST *len) | |
20891 | { | |
20892 | struct dwarf2_cu *cu; | |
20893 | struct die_info *die; | |
20894 | struct attribute *attr; | |
20895 | const gdb_byte *result = NULL; | |
20896 | struct type *type; | |
20897 | LONGEST value; | |
20898 | enum bfd_endian byte_order; | |
20899 | ||
20900 | dw2_setup (per_cu->objfile); | |
20901 | ||
20902 | if (per_cu->cu == NULL) | |
20903 | load_cu (per_cu); | |
20904 | cu = per_cu->cu; | |
cc12ce38 DE |
20905 | if (cu == NULL) |
20906 | { | |
20907 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20908 | Instead just throw an error, not much else we can do. */ | |
20909 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20910 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20911 | } |
b6807d98 | 20912 | |
9c541725 | 20913 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
20914 | if (!die) |
20915 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20916 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
20917 | |
20918 | ||
20919 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20920 | if (attr == NULL) | |
20921 | return NULL; | |
20922 | ||
20923 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20924 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20925 | ||
20926 | switch (attr->form) | |
20927 | { | |
20928 | case DW_FORM_addr: | |
20929 | case DW_FORM_GNU_addr_index: | |
20930 | { | |
20931 | gdb_byte *tem; | |
20932 | ||
20933 | *len = cu->header.addr_size; | |
224c3ddb | 20934 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20935 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20936 | result = tem; | |
20937 | } | |
20938 | break; | |
20939 | case DW_FORM_string: | |
20940 | case DW_FORM_strp: | |
20941 | case DW_FORM_GNU_str_index: | |
20942 | case DW_FORM_GNU_strp_alt: | |
20943 | /* DW_STRING is already allocated on the objfile obstack, point | |
20944 | directly to it. */ | |
20945 | result = (const gdb_byte *) DW_STRING (attr); | |
20946 | *len = strlen (DW_STRING (attr)); | |
20947 | break; | |
20948 | case DW_FORM_block1: | |
20949 | case DW_FORM_block2: | |
20950 | case DW_FORM_block4: | |
20951 | case DW_FORM_block: | |
20952 | case DW_FORM_exprloc: | |
0224619f | 20953 | case DW_FORM_data16: |
b6807d98 TT |
20954 | result = DW_BLOCK (attr)->data; |
20955 | *len = DW_BLOCK (attr)->size; | |
20956 | break; | |
20957 | ||
20958 | /* The DW_AT_const_value attributes are supposed to carry the | |
20959 | symbol's value "represented as it would be on the target | |
20960 | architecture." By the time we get here, it's already been | |
20961 | converted to host endianness, so we just need to sign- or | |
20962 | zero-extend it as appropriate. */ | |
20963 | case DW_FORM_data1: | |
20964 | type = die_type (die, cu); | |
20965 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20966 | if (result == NULL) | |
20967 | result = write_constant_as_bytes (obstack, byte_order, | |
20968 | type, value, len); | |
20969 | break; | |
20970 | case DW_FORM_data2: | |
20971 | type = die_type (die, cu); | |
20972 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20973 | if (result == NULL) | |
20974 | result = write_constant_as_bytes (obstack, byte_order, | |
20975 | type, value, len); | |
20976 | break; | |
20977 | case DW_FORM_data4: | |
20978 | type = die_type (die, cu); | |
20979 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20980 | if (result == NULL) | |
20981 | result = write_constant_as_bytes (obstack, byte_order, | |
20982 | type, value, len); | |
20983 | break; | |
20984 | case DW_FORM_data8: | |
20985 | type = die_type (die, cu); | |
20986 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20987 | if (result == NULL) | |
20988 | result = write_constant_as_bytes (obstack, byte_order, | |
20989 | type, value, len); | |
20990 | break; | |
20991 | ||
20992 | case DW_FORM_sdata: | |
663c44ac | 20993 | case DW_FORM_implicit_const: |
b6807d98 TT |
20994 | type = die_type (die, cu); |
20995 | result = write_constant_as_bytes (obstack, byte_order, | |
20996 | type, DW_SND (attr), len); | |
20997 | break; | |
20998 | ||
20999 | case DW_FORM_udata: | |
21000 | type = die_type (die, cu); | |
21001 | result = write_constant_as_bytes (obstack, byte_order, | |
21002 | type, DW_UNSND (attr), len); | |
21003 | break; | |
21004 | ||
21005 | default: | |
21006 | complaint (&symfile_complaints, | |
21007 | _("unsupported const value attribute form: '%s'"), | |
21008 | dwarf_form_name (attr->form)); | |
21009 | break; | |
21010 | } | |
21011 | ||
21012 | return result; | |
21013 | } | |
21014 | ||
7942e96e AA |
21015 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21016 | valid type for this die is found. */ | |
21017 | ||
21018 | struct type * | |
9c541725 | 21019 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21020 | struct dwarf2_per_cu_data *per_cu) |
21021 | { | |
21022 | struct dwarf2_cu *cu; | |
21023 | struct die_info *die; | |
21024 | ||
21025 | dw2_setup (per_cu->objfile); | |
21026 | ||
21027 | if (per_cu->cu == NULL) | |
21028 | load_cu (per_cu); | |
21029 | cu = per_cu->cu; | |
21030 | if (!cu) | |
21031 | return NULL; | |
21032 | ||
9c541725 | 21033 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21034 | if (!die) |
21035 | return NULL; | |
21036 | ||
21037 | return die_type (die, cu); | |
21038 | } | |
21039 | ||
8a9b8146 TT |
21040 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21041 | PER_CU. */ | |
21042 | ||
21043 | struct type * | |
b64f50a1 | 21044 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21045 | struct dwarf2_per_cu_data *per_cu) |
21046 | { | |
8a9b8146 | 21047 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21048 | |
9c541725 | 21049 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21050 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21051 | } |
21052 | ||
ac9ec31b | 21053 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21054 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21055 | On exit *REF_CU is the CU of the result. |
21056 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21057 | |
21058 | static struct die_info * | |
ac9ec31b DE |
21059 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21060 | struct dwarf2_cu **ref_cu) | |
348e048f | 21061 | { |
348e048f | 21062 | struct die_info temp_die; |
348e048f DE |
21063 | struct dwarf2_cu *sig_cu; |
21064 | struct die_info *die; | |
21065 | ||
ac9ec31b DE |
21066 | /* While it might be nice to assert sig_type->type == NULL here, |
21067 | we can get here for DW_AT_imported_declaration where we need | |
21068 | the DIE not the type. */ | |
348e048f DE |
21069 | |
21070 | /* If necessary, add it to the queue and load its DIEs. */ | |
21071 | ||
95554aad | 21072 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21073 | read_signatured_type (sig_type); |
348e048f | 21074 | |
348e048f | 21075 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21076 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21077 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21078 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21079 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21080 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21081 | if (die) |
21082 | { | |
796a7ff8 DE |
21083 | /* For .gdb_index version 7 keep track of included TUs. |
21084 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21085 | if (dwarf2_per_objfile->index_table != NULL | |
21086 | && dwarf2_per_objfile->index_table->version <= 7) | |
21087 | { | |
21088 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21089 | (*ref_cu)->per_cu->imported_symtabs, | |
21090 | sig_cu->per_cu); | |
21091 | } | |
21092 | ||
348e048f DE |
21093 | *ref_cu = sig_cu; |
21094 | return die; | |
21095 | } | |
21096 | ||
ac9ec31b DE |
21097 | return NULL; |
21098 | } | |
21099 | ||
21100 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21101 | On entry *REF_CU is the CU of SRC_DIE. | |
21102 | On exit *REF_CU is the CU of the result. | |
21103 | The result is the DIE of the type. | |
21104 | If the referenced type cannot be found an error is thrown. */ | |
21105 | ||
21106 | static struct die_info * | |
ff39bb5e | 21107 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21108 | struct dwarf2_cu **ref_cu) |
21109 | { | |
21110 | ULONGEST signature = DW_SIGNATURE (attr); | |
21111 | struct signatured_type *sig_type; | |
21112 | struct die_info *die; | |
21113 | ||
21114 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21115 | ||
a2ce51a0 | 21116 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21117 | /* sig_type will be NULL if the signatured type is missing from |
21118 | the debug info. */ | |
21119 | if (sig_type == NULL) | |
21120 | { | |
21121 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21122 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21123 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21124 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21125 | } |
21126 | ||
21127 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21128 | if (die == NULL) | |
21129 | { | |
21130 | dump_die_for_error (src_die); | |
21131 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21132 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21133 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21134 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21135 | } |
21136 | ||
21137 | return die; | |
21138 | } | |
21139 | ||
21140 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21141 | reading in and processing the type unit if necessary. */ | |
21142 | ||
21143 | static struct type * | |
21144 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21145 | struct dwarf2_cu *cu) | |
21146 | { | |
21147 | struct signatured_type *sig_type; | |
21148 | struct dwarf2_cu *type_cu; | |
21149 | struct die_info *type_die; | |
21150 | struct type *type; | |
21151 | ||
a2ce51a0 | 21152 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21153 | /* sig_type will be NULL if the signatured type is missing from |
21154 | the debug info. */ | |
21155 | if (sig_type == NULL) | |
21156 | { | |
21157 | complaint (&symfile_complaints, | |
21158 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21159 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21160 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21161 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21162 | return build_error_marker_type (cu, die); |
21163 | } | |
21164 | ||
21165 | /* If we already know the type we're done. */ | |
21166 | if (sig_type->type != NULL) | |
21167 | return sig_type->type; | |
21168 | ||
21169 | type_cu = cu; | |
21170 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21171 | if (type_die != NULL) | |
21172 | { | |
21173 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21174 | is created. This is important, for example, because for c++ classes | |
21175 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
21176 | type = read_type_die (type_die, type_cu); | |
21177 | if (type == NULL) | |
21178 | { | |
21179 | complaint (&symfile_complaints, | |
21180 | _("Dwarf Error: Cannot build signatured type %s" | |
21181 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 21182 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21183 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21184 | type = build_error_marker_type (cu, die); |
21185 | } | |
21186 | } | |
21187 | else | |
21188 | { | |
21189 | complaint (&symfile_complaints, | |
21190 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21191 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21192 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21193 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21194 | type = build_error_marker_type (cu, die); |
21195 | } | |
21196 | sig_type->type = type; | |
21197 | ||
21198 | return type; | |
21199 | } | |
21200 | ||
21201 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
21202 | reading in and processing the type unit if necessary. */ | |
21203 | ||
21204 | static struct type * | |
ff39bb5e | 21205 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 21206 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
21207 | { |
21208 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 21209 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21210 | { |
21211 | struct dwarf2_cu *type_cu = cu; | |
21212 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
21213 | ||
21214 | return read_type_die (type_die, type_cu); | |
21215 | } | |
21216 | else if (attr->form == DW_FORM_ref_sig8) | |
21217 | { | |
21218 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
21219 | } | |
21220 | else | |
21221 | { | |
21222 | complaint (&symfile_complaints, | |
21223 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
21224 | " at 0x%x [in module %s]"), | |
9c541725 | 21225 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 21226 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21227 | return build_error_marker_type (cu, die); |
21228 | } | |
348e048f DE |
21229 | } |
21230 | ||
e5fe5e75 | 21231 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
21232 | |
21233 | static void | |
e5fe5e75 | 21234 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 21235 | { |
52dc124a | 21236 | struct signatured_type *sig_type; |
348e048f | 21237 | |
f4dc4d17 DE |
21238 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
21239 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
21240 | ||
6721b2ec DE |
21241 | /* We have the per_cu, but we need the signatured_type. |
21242 | Fortunately this is an easy translation. */ | |
21243 | gdb_assert (per_cu->is_debug_types); | |
21244 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 21245 | |
6721b2ec | 21246 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21247 | |
52dc124a | 21248 | read_signatured_type (sig_type); |
348e048f | 21249 | |
6721b2ec | 21250 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
21251 | } |
21252 | ||
dee91e82 DE |
21253 | /* die_reader_func for read_signatured_type. |
21254 | This is identical to load_full_comp_unit_reader, | |
21255 | but is kept separate for now. */ | |
348e048f DE |
21256 | |
21257 | static void | |
dee91e82 | 21258 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 21259 | const gdb_byte *info_ptr, |
dee91e82 DE |
21260 | struct die_info *comp_unit_die, |
21261 | int has_children, | |
21262 | void *data) | |
348e048f | 21263 | { |
dee91e82 | 21264 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 21265 | |
dee91e82 DE |
21266 | gdb_assert (cu->die_hash == NULL); |
21267 | cu->die_hash = | |
21268 | htab_create_alloc_ex (cu->header.length / 12, | |
21269 | die_hash, | |
21270 | die_eq, | |
21271 | NULL, | |
21272 | &cu->comp_unit_obstack, | |
21273 | hashtab_obstack_allocate, | |
21274 | dummy_obstack_deallocate); | |
348e048f | 21275 | |
dee91e82 DE |
21276 | if (has_children) |
21277 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
21278 | &info_ptr, comp_unit_die); | |
21279 | cu->dies = comp_unit_die; | |
21280 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
21281 | |
21282 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 21283 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 21284 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
21285 | or we won't be able to build types correctly. |
21286 | Similarly, if we do not read the producer, we can not apply | |
21287 | producer-specific interpretation. */ | |
95554aad | 21288 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 21289 | } |
348e048f | 21290 | |
3019eac3 DE |
21291 | /* Read in a signatured type and build its CU and DIEs. |
21292 | If the type is a stub for the real type in a DWO file, | |
21293 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
21294 | |
21295 | static void | |
21296 | read_signatured_type (struct signatured_type *sig_type) | |
21297 | { | |
21298 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 21299 | |
3019eac3 | 21300 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 21301 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21302 | |
f4dc4d17 DE |
21303 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
21304 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 21305 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
21306 | } |
21307 | ||
c906108c SS |
21308 | /* Decode simple location descriptions. |
21309 | Given a pointer to a dwarf block that defines a location, compute | |
21310 | the location and return the value. | |
21311 | ||
4cecd739 DJ |
21312 | NOTE drow/2003-11-18: This function is called in two situations |
21313 | now: for the address of static or global variables (partial symbols | |
21314 | only) and for offsets into structures which are expected to be | |
21315 | (more or less) constant. The partial symbol case should go away, | |
21316 | and only the constant case should remain. That will let this | |
21317 | function complain more accurately. A few special modes are allowed | |
21318 | without complaint for global variables (for instance, global | |
21319 | register values and thread-local values). | |
c906108c SS |
21320 | |
21321 | A location description containing no operations indicates that the | |
4cecd739 | 21322 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
21323 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
21324 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
21325 | complaint. |
21326 | ||
21327 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
21328 | |
21329 | static CORE_ADDR | |
e7c27a73 | 21330 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 21331 | { |
e7c27a73 | 21332 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
21333 | size_t i; |
21334 | size_t size = blk->size; | |
d521ce57 | 21335 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
21336 | CORE_ADDR stack[64]; |
21337 | int stacki; | |
21338 | unsigned int bytes_read, unsnd; | |
21339 | gdb_byte op; | |
c906108c | 21340 | |
21ae7a4d JK |
21341 | i = 0; |
21342 | stacki = 0; | |
21343 | stack[stacki] = 0; | |
21344 | stack[++stacki] = 0; | |
21345 | ||
21346 | while (i < size) | |
21347 | { | |
21348 | op = data[i++]; | |
21349 | switch (op) | |
21350 | { | |
21351 | case DW_OP_lit0: | |
21352 | case DW_OP_lit1: | |
21353 | case DW_OP_lit2: | |
21354 | case DW_OP_lit3: | |
21355 | case DW_OP_lit4: | |
21356 | case DW_OP_lit5: | |
21357 | case DW_OP_lit6: | |
21358 | case DW_OP_lit7: | |
21359 | case DW_OP_lit8: | |
21360 | case DW_OP_lit9: | |
21361 | case DW_OP_lit10: | |
21362 | case DW_OP_lit11: | |
21363 | case DW_OP_lit12: | |
21364 | case DW_OP_lit13: | |
21365 | case DW_OP_lit14: | |
21366 | case DW_OP_lit15: | |
21367 | case DW_OP_lit16: | |
21368 | case DW_OP_lit17: | |
21369 | case DW_OP_lit18: | |
21370 | case DW_OP_lit19: | |
21371 | case DW_OP_lit20: | |
21372 | case DW_OP_lit21: | |
21373 | case DW_OP_lit22: | |
21374 | case DW_OP_lit23: | |
21375 | case DW_OP_lit24: | |
21376 | case DW_OP_lit25: | |
21377 | case DW_OP_lit26: | |
21378 | case DW_OP_lit27: | |
21379 | case DW_OP_lit28: | |
21380 | case DW_OP_lit29: | |
21381 | case DW_OP_lit30: | |
21382 | case DW_OP_lit31: | |
21383 | stack[++stacki] = op - DW_OP_lit0; | |
21384 | break; | |
f1bea926 | 21385 | |
21ae7a4d JK |
21386 | case DW_OP_reg0: |
21387 | case DW_OP_reg1: | |
21388 | case DW_OP_reg2: | |
21389 | case DW_OP_reg3: | |
21390 | case DW_OP_reg4: | |
21391 | case DW_OP_reg5: | |
21392 | case DW_OP_reg6: | |
21393 | case DW_OP_reg7: | |
21394 | case DW_OP_reg8: | |
21395 | case DW_OP_reg9: | |
21396 | case DW_OP_reg10: | |
21397 | case DW_OP_reg11: | |
21398 | case DW_OP_reg12: | |
21399 | case DW_OP_reg13: | |
21400 | case DW_OP_reg14: | |
21401 | case DW_OP_reg15: | |
21402 | case DW_OP_reg16: | |
21403 | case DW_OP_reg17: | |
21404 | case DW_OP_reg18: | |
21405 | case DW_OP_reg19: | |
21406 | case DW_OP_reg20: | |
21407 | case DW_OP_reg21: | |
21408 | case DW_OP_reg22: | |
21409 | case DW_OP_reg23: | |
21410 | case DW_OP_reg24: | |
21411 | case DW_OP_reg25: | |
21412 | case DW_OP_reg26: | |
21413 | case DW_OP_reg27: | |
21414 | case DW_OP_reg28: | |
21415 | case DW_OP_reg29: | |
21416 | case DW_OP_reg30: | |
21417 | case DW_OP_reg31: | |
21418 | stack[++stacki] = op - DW_OP_reg0; | |
21419 | if (i < size) | |
21420 | dwarf2_complex_location_expr_complaint (); | |
21421 | break; | |
c906108c | 21422 | |
21ae7a4d JK |
21423 | case DW_OP_regx: |
21424 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
21425 | i += bytes_read; | |
21426 | stack[++stacki] = unsnd; | |
21427 | if (i < size) | |
21428 | dwarf2_complex_location_expr_complaint (); | |
21429 | break; | |
c906108c | 21430 | |
21ae7a4d JK |
21431 | case DW_OP_addr: |
21432 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
21433 | cu, &bytes_read); | |
21434 | i += bytes_read; | |
21435 | break; | |
d53d4ac5 | 21436 | |
21ae7a4d JK |
21437 | case DW_OP_const1u: |
21438 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
21439 | i += 1; | |
21440 | break; | |
21441 | ||
21442 | case DW_OP_const1s: | |
21443 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
21444 | i += 1; | |
21445 | break; | |
21446 | ||
21447 | case DW_OP_const2u: | |
21448 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
21449 | i += 2; | |
21450 | break; | |
21451 | ||
21452 | case DW_OP_const2s: | |
21453 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
21454 | i += 2; | |
21455 | break; | |
d53d4ac5 | 21456 | |
21ae7a4d JK |
21457 | case DW_OP_const4u: |
21458 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
21459 | i += 4; | |
21460 | break; | |
21461 | ||
21462 | case DW_OP_const4s: | |
21463 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
21464 | i += 4; | |
21465 | break; | |
21466 | ||
585861ea JK |
21467 | case DW_OP_const8u: |
21468 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
21469 | i += 8; | |
21470 | break; | |
21471 | ||
21ae7a4d JK |
21472 | case DW_OP_constu: |
21473 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
21474 | &bytes_read); | |
21475 | i += bytes_read; | |
21476 | break; | |
21477 | ||
21478 | case DW_OP_consts: | |
21479 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
21480 | i += bytes_read; | |
21481 | break; | |
21482 | ||
21483 | case DW_OP_dup: | |
21484 | stack[stacki + 1] = stack[stacki]; | |
21485 | stacki++; | |
21486 | break; | |
21487 | ||
21488 | case DW_OP_plus: | |
21489 | stack[stacki - 1] += stack[stacki]; | |
21490 | stacki--; | |
21491 | break; | |
21492 | ||
21493 | case DW_OP_plus_uconst: | |
21494 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
21495 | &bytes_read); | |
21496 | i += bytes_read; | |
21497 | break; | |
21498 | ||
21499 | case DW_OP_minus: | |
21500 | stack[stacki - 1] -= stack[stacki]; | |
21501 | stacki--; | |
21502 | break; | |
21503 | ||
21504 | case DW_OP_deref: | |
21505 | /* If we're not the last op, then we definitely can't encode | |
21506 | this using GDB's address_class enum. This is valid for partial | |
21507 | global symbols, although the variable's address will be bogus | |
21508 | in the psymtab. */ | |
21509 | if (i < size) | |
21510 | dwarf2_complex_location_expr_complaint (); | |
21511 | break; | |
21512 | ||
21513 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 21514 | case DW_OP_form_tls_address: |
21ae7a4d JK |
21515 | /* The top of the stack has the offset from the beginning |
21516 | of the thread control block at which the variable is located. */ | |
21517 | /* Nothing should follow this operator, so the top of stack would | |
21518 | be returned. */ | |
21519 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
21520 | address will be bogus in the psymtab. Make it always at least |
21521 | non-zero to not look as a variable garbage collected by linker | |
21522 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
21523 | if (i < size) |
21524 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 21525 | stack[stacki]++; |
21ae7a4d JK |
21526 | break; |
21527 | ||
21528 | case DW_OP_GNU_uninit: | |
21529 | break; | |
21530 | ||
3019eac3 | 21531 | case DW_OP_GNU_addr_index: |
49f6c839 | 21532 | case DW_OP_GNU_const_index: |
3019eac3 DE |
21533 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
21534 | &bytes_read); | |
21535 | i += bytes_read; | |
21536 | break; | |
21537 | ||
21ae7a4d JK |
21538 | default: |
21539 | { | |
f39c6ffd | 21540 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
21541 | |
21542 | if (name) | |
21543 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
21544 | name); | |
21545 | else | |
21546 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
21547 | op); | |
21548 | } | |
21549 | ||
21550 | return (stack[stacki]); | |
d53d4ac5 | 21551 | } |
3c6e0cb3 | 21552 | |
21ae7a4d JK |
21553 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
21554 | outside of the allocated space. Also enforce minimum>0. */ | |
21555 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
21556 | { | |
21557 | complaint (&symfile_complaints, | |
21558 | _("location description stack overflow")); | |
21559 | return 0; | |
21560 | } | |
21561 | ||
21562 | if (stacki <= 0) | |
21563 | { | |
21564 | complaint (&symfile_complaints, | |
21565 | _("location description stack underflow")); | |
21566 | return 0; | |
21567 | } | |
21568 | } | |
21569 | return (stack[stacki]); | |
c906108c SS |
21570 | } |
21571 | ||
21572 | /* memory allocation interface */ | |
21573 | ||
c906108c | 21574 | static struct dwarf_block * |
7b5a2f43 | 21575 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 21576 | { |
8d749320 | 21577 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
21578 | } |
21579 | ||
c906108c | 21580 | static struct die_info * |
b60c80d6 | 21581 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
21582 | { |
21583 | struct die_info *die; | |
b60c80d6 DJ |
21584 | size_t size = sizeof (struct die_info); |
21585 | ||
21586 | if (num_attrs > 1) | |
21587 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 21588 | |
b60c80d6 | 21589 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
21590 | memset (die, 0, sizeof (struct die_info)); |
21591 | return (die); | |
21592 | } | |
2e276125 JB |
21593 | |
21594 | \f | |
21595 | /* Macro support. */ | |
21596 | ||
233d95b5 JK |
21597 | /* Return file name relative to the compilation directory of file number I in |
21598 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 21599 | responsible for freeing it. */ |
233d95b5 | 21600 | |
2e276125 | 21601 | static char * |
233d95b5 | 21602 | file_file_name (int file, struct line_header *lh) |
2e276125 | 21603 | { |
6a83a1e6 EZ |
21604 | /* Is the file number a valid index into the line header's file name |
21605 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21606 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 21607 | { |
8c43009f | 21608 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 21609 | |
8c43009f PA |
21610 | if (!IS_ABSOLUTE_PATH (fe.name)) |
21611 | { | |
21612 | const char *dir = fe.include_dir (lh); | |
21613 | if (dir != NULL) | |
21614 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
21615 | } | |
21616 | return xstrdup (fe.name); | |
6a83a1e6 | 21617 | } |
2e276125 JB |
21618 | else |
21619 | { | |
6a83a1e6 EZ |
21620 | /* The compiler produced a bogus file number. We can at least |
21621 | record the macro definitions made in the file, even if we | |
21622 | won't be able to find the file by name. */ | |
21623 | char fake_name[80]; | |
9a619af0 | 21624 | |
8c042590 PM |
21625 | xsnprintf (fake_name, sizeof (fake_name), |
21626 | "<bad macro file number %d>", file); | |
2e276125 | 21627 | |
6e70227d | 21628 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
21629 | _("bad file number in macro information (%d)"), |
21630 | file); | |
2e276125 | 21631 | |
6a83a1e6 | 21632 | return xstrdup (fake_name); |
2e276125 JB |
21633 | } |
21634 | } | |
21635 | ||
233d95b5 JK |
21636 | /* Return the full name of file number I in *LH's file name table. |
21637 | Use COMP_DIR as the name of the current directory of the | |
21638 | compilation. The result is allocated using xmalloc; the caller is | |
21639 | responsible for freeing it. */ | |
21640 | static char * | |
21641 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
21642 | { | |
21643 | /* Is the file number a valid index into the line header's file name | |
21644 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21645 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
21646 | { |
21647 | char *relative = file_file_name (file, lh); | |
21648 | ||
21649 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
21650 | return relative; | |
b36cec19 PA |
21651 | return reconcat (relative, comp_dir, SLASH_STRING, |
21652 | relative, (char *) NULL); | |
233d95b5 JK |
21653 | } |
21654 | else | |
21655 | return file_file_name (file, lh); | |
21656 | } | |
21657 | ||
2e276125 JB |
21658 | |
21659 | static struct macro_source_file * | |
21660 | macro_start_file (int file, int line, | |
21661 | struct macro_source_file *current_file, | |
43f3e411 | 21662 | struct line_header *lh) |
2e276125 | 21663 | { |
233d95b5 JK |
21664 | /* File name relative to the compilation directory of this source file. */ |
21665 | char *file_name = file_file_name (file, lh); | |
2e276125 | 21666 | |
2e276125 | 21667 | if (! current_file) |
abc9d0dc | 21668 | { |
fc474241 DE |
21669 | /* Note: We don't create a macro table for this compilation unit |
21670 | at all until we actually get a filename. */ | |
43f3e411 | 21671 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 21672 | |
abc9d0dc TT |
21673 | /* If we have no current file, then this must be the start_file |
21674 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
21675 | current_file = macro_set_main (macro_table, file_name); |
21676 | macro_define_special (macro_table); | |
abc9d0dc | 21677 | } |
2e276125 | 21678 | else |
233d95b5 | 21679 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 21680 | |
233d95b5 | 21681 | xfree (file_name); |
6e70227d | 21682 | |
2e276125 JB |
21683 | return current_file; |
21684 | } | |
21685 | ||
2e276125 JB |
21686 | static const char * |
21687 | consume_improper_spaces (const char *p, const char *body) | |
21688 | { | |
21689 | if (*p == ' ') | |
21690 | { | |
4d3c2250 | 21691 | complaint (&symfile_complaints, |
3e43a32a MS |
21692 | _("macro definition contains spaces " |
21693 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 21694 | body); |
2e276125 JB |
21695 | |
21696 | while (*p == ' ') | |
21697 | p++; | |
21698 | } | |
21699 | ||
21700 | return p; | |
21701 | } | |
21702 | ||
21703 | ||
21704 | static void | |
21705 | parse_macro_definition (struct macro_source_file *file, int line, | |
21706 | const char *body) | |
21707 | { | |
21708 | const char *p; | |
21709 | ||
21710 | /* The body string takes one of two forms. For object-like macro | |
21711 | definitions, it should be: | |
21712 | ||
21713 | <macro name> " " <definition> | |
21714 | ||
21715 | For function-like macro definitions, it should be: | |
21716 | ||
21717 | <macro name> "() " <definition> | |
21718 | or | |
21719 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
21720 | ||
21721 | Spaces may appear only where explicitly indicated, and in the | |
21722 | <definition>. | |
21723 | ||
21724 | The Dwarf 2 spec says that an object-like macro's name is always | |
21725 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 21726 | the space when the macro's definition is the empty string. |
2e276125 JB |
21727 | |
21728 | The Dwarf 2 spec says that there should be no spaces between the | |
21729 | formal arguments in a function-like macro's formal argument list, | |
21730 | but versions of GCC around March 2002 include spaces after the | |
21731 | commas. */ | |
21732 | ||
21733 | ||
21734 | /* Find the extent of the macro name. The macro name is terminated | |
21735 | by either a space or null character (for an object-like macro) or | |
21736 | an opening paren (for a function-like macro). */ | |
21737 | for (p = body; *p; p++) | |
21738 | if (*p == ' ' || *p == '(') | |
21739 | break; | |
21740 | ||
21741 | if (*p == ' ' || *p == '\0') | |
21742 | { | |
21743 | /* It's an object-like macro. */ | |
21744 | int name_len = p - body; | |
3f8a7804 | 21745 | char *name = savestring (body, name_len); |
2e276125 JB |
21746 | const char *replacement; |
21747 | ||
21748 | if (*p == ' ') | |
21749 | replacement = body + name_len + 1; | |
21750 | else | |
21751 | { | |
4d3c2250 | 21752 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21753 | replacement = body + name_len; |
21754 | } | |
6e70227d | 21755 | |
2e276125 JB |
21756 | macro_define_object (file, line, name, replacement); |
21757 | ||
21758 | xfree (name); | |
21759 | } | |
21760 | else if (*p == '(') | |
21761 | { | |
21762 | /* It's a function-like macro. */ | |
3f8a7804 | 21763 | char *name = savestring (body, p - body); |
2e276125 JB |
21764 | int argc = 0; |
21765 | int argv_size = 1; | |
8d749320 | 21766 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21767 | |
21768 | p++; | |
21769 | ||
21770 | p = consume_improper_spaces (p, body); | |
21771 | ||
21772 | /* Parse the formal argument list. */ | |
21773 | while (*p && *p != ')') | |
21774 | { | |
21775 | /* Find the extent of the current argument name. */ | |
21776 | const char *arg_start = p; | |
21777 | ||
21778 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21779 | p++; | |
21780 | ||
21781 | if (! *p || p == arg_start) | |
4d3c2250 | 21782 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21783 | else |
21784 | { | |
21785 | /* Make sure argv has room for the new argument. */ | |
21786 | if (argc >= argv_size) | |
21787 | { | |
21788 | argv_size *= 2; | |
224c3ddb | 21789 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21790 | } |
21791 | ||
3f8a7804 | 21792 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
21793 | } |
21794 | ||
21795 | p = consume_improper_spaces (p, body); | |
21796 | ||
21797 | /* Consume the comma, if present. */ | |
21798 | if (*p == ',') | |
21799 | { | |
21800 | p++; | |
21801 | ||
21802 | p = consume_improper_spaces (p, body); | |
21803 | } | |
21804 | } | |
21805 | ||
21806 | if (*p == ')') | |
21807 | { | |
21808 | p++; | |
21809 | ||
21810 | if (*p == ' ') | |
21811 | /* Perfectly formed definition, no complaints. */ | |
21812 | macro_define_function (file, line, name, | |
6e70227d | 21813 | argc, (const char **) argv, |
2e276125 JB |
21814 | p + 1); |
21815 | else if (*p == '\0') | |
21816 | { | |
21817 | /* Complain, but do define it. */ | |
4d3c2250 | 21818 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21819 | macro_define_function (file, line, name, |
6e70227d | 21820 | argc, (const char **) argv, |
2e276125 JB |
21821 | p); |
21822 | } | |
21823 | else | |
21824 | /* Just complain. */ | |
4d3c2250 | 21825 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21826 | } |
21827 | else | |
21828 | /* Just complain. */ | |
4d3c2250 | 21829 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21830 | |
21831 | xfree (name); | |
21832 | { | |
21833 | int i; | |
21834 | ||
21835 | for (i = 0; i < argc; i++) | |
21836 | xfree (argv[i]); | |
21837 | } | |
21838 | xfree (argv); | |
21839 | } | |
21840 | else | |
4d3c2250 | 21841 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21842 | } |
21843 | ||
cf2c3c16 TT |
21844 | /* Skip some bytes from BYTES according to the form given in FORM. |
21845 | Returns the new pointer. */ | |
2e276125 | 21846 | |
d521ce57 TT |
21847 | static const gdb_byte * |
21848 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21849 | enum dwarf_form form, |
21850 | unsigned int offset_size, | |
21851 | struct dwarf2_section_info *section) | |
2e276125 | 21852 | { |
cf2c3c16 | 21853 | unsigned int bytes_read; |
2e276125 | 21854 | |
cf2c3c16 | 21855 | switch (form) |
2e276125 | 21856 | { |
cf2c3c16 TT |
21857 | case DW_FORM_data1: |
21858 | case DW_FORM_flag: | |
21859 | ++bytes; | |
21860 | break; | |
21861 | ||
21862 | case DW_FORM_data2: | |
21863 | bytes += 2; | |
21864 | break; | |
21865 | ||
21866 | case DW_FORM_data4: | |
21867 | bytes += 4; | |
21868 | break; | |
21869 | ||
21870 | case DW_FORM_data8: | |
21871 | bytes += 8; | |
21872 | break; | |
21873 | ||
0224619f JK |
21874 | case DW_FORM_data16: |
21875 | bytes += 16; | |
21876 | break; | |
21877 | ||
cf2c3c16 TT |
21878 | case DW_FORM_string: |
21879 | read_direct_string (abfd, bytes, &bytes_read); | |
21880 | bytes += bytes_read; | |
21881 | break; | |
21882 | ||
21883 | case DW_FORM_sec_offset: | |
21884 | case DW_FORM_strp: | |
36586728 | 21885 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21886 | bytes += offset_size; |
21887 | break; | |
21888 | ||
21889 | case DW_FORM_block: | |
21890 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21891 | bytes += bytes_read; | |
21892 | break; | |
21893 | ||
21894 | case DW_FORM_block1: | |
21895 | bytes += 1 + read_1_byte (abfd, bytes); | |
21896 | break; | |
21897 | case DW_FORM_block2: | |
21898 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21899 | break; | |
21900 | case DW_FORM_block4: | |
21901 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21902 | break; | |
21903 | ||
21904 | case DW_FORM_sdata: | |
21905 | case DW_FORM_udata: | |
3019eac3 DE |
21906 | case DW_FORM_GNU_addr_index: |
21907 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21908 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21909 | if (bytes == NULL) |
21910 | { | |
21911 | dwarf2_section_buffer_overflow_complaint (section); | |
21912 | return NULL; | |
21913 | } | |
cf2c3c16 TT |
21914 | break; |
21915 | ||
663c44ac JK |
21916 | case DW_FORM_implicit_const: |
21917 | break; | |
21918 | ||
cf2c3c16 TT |
21919 | default: |
21920 | { | |
21921 | complain: | |
21922 | complaint (&symfile_complaints, | |
21923 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21924 | form, get_section_name (section)); |
cf2c3c16 TT |
21925 | return NULL; |
21926 | } | |
2e276125 JB |
21927 | } |
21928 | ||
cf2c3c16 TT |
21929 | return bytes; |
21930 | } | |
757a13d0 | 21931 | |
cf2c3c16 TT |
21932 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21933 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21934 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21935 | |
d521ce57 | 21936 | static const gdb_byte * |
cf2c3c16 | 21937 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21938 | const gdb_byte **opcode_definitions, |
21939 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21940 | bfd *abfd, |
21941 | unsigned int offset_size, | |
21942 | struct dwarf2_section_info *section) | |
21943 | { | |
21944 | unsigned int bytes_read, i; | |
21945 | unsigned long arg; | |
d521ce57 | 21946 | const gdb_byte *defn; |
2e276125 | 21947 | |
cf2c3c16 | 21948 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21949 | { |
cf2c3c16 TT |
21950 | complaint (&symfile_complaints, |
21951 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21952 | opcode); | |
21953 | return NULL; | |
21954 | } | |
2e276125 | 21955 | |
cf2c3c16 TT |
21956 | defn = opcode_definitions[opcode]; |
21957 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21958 | defn += bytes_read; | |
2e276125 | 21959 | |
cf2c3c16 TT |
21960 | for (i = 0; i < arg; ++i) |
21961 | { | |
aead7601 SM |
21962 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21963 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21964 | section); |
cf2c3c16 TT |
21965 | if (mac_ptr == NULL) |
21966 | { | |
21967 | /* skip_form_bytes already issued the complaint. */ | |
21968 | return NULL; | |
21969 | } | |
21970 | } | |
757a13d0 | 21971 | |
cf2c3c16 TT |
21972 | return mac_ptr; |
21973 | } | |
757a13d0 | 21974 | |
cf2c3c16 TT |
21975 | /* A helper function which parses the header of a macro section. |
21976 | If the macro section is the extended (for now called "GNU") type, | |
21977 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21978 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21979 | |
d521ce57 TT |
21980 | static const gdb_byte * |
21981 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21982 | bfd *abfd, |
d521ce57 | 21983 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21984 | unsigned int *offset_size, |
21985 | int section_is_gnu) | |
21986 | { | |
21987 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21988 | |
cf2c3c16 TT |
21989 | if (section_is_gnu) |
21990 | { | |
21991 | unsigned int version, flags; | |
757a13d0 | 21992 | |
cf2c3c16 | 21993 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 21994 | if (version != 4 && version != 5) |
cf2c3c16 TT |
21995 | { |
21996 | complaint (&symfile_complaints, | |
21997 | _("unrecognized version `%d' in .debug_macro section"), | |
21998 | version); | |
21999 | return NULL; | |
22000 | } | |
22001 | mac_ptr += 2; | |
757a13d0 | 22002 | |
cf2c3c16 TT |
22003 | flags = read_1_byte (abfd, mac_ptr); |
22004 | ++mac_ptr; | |
22005 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22006 | |
cf2c3c16 TT |
22007 | if ((flags & 2) != 0) |
22008 | /* We don't need the line table offset. */ | |
22009 | mac_ptr += *offset_size; | |
757a13d0 | 22010 | |
cf2c3c16 TT |
22011 | /* Vendor opcode descriptions. */ |
22012 | if ((flags & 4) != 0) | |
22013 | { | |
22014 | unsigned int i, count; | |
757a13d0 | 22015 | |
cf2c3c16 TT |
22016 | count = read_1_byte (abfd, mac_ptr); |
22017 | ++mac_ptr; | |
22018 | for (i = 0; i < count; ++i) | |
22019 | { | |
22020 | unsigned int opcode, bytes_read; | |
22021 | unsigned long arg; | |
22022 | ||
22023 | opcode = read_1_byte (abfd, mac_ptr); | |
22024 | ++mac_ptr; | |
22025 | opcode_definitions[opcode] = mac_ptr; | |
22026 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22027 | mac_ptr += bytes_read; | |
22028 | mac_ptr += arg; | |
22029 | } | |
757a13d0 | 22030 | } |
cf2c3c16 | 22031 | } |
757a13d0 | 22032 | |
cf2c3c16 TT |
22033 | return mac_ptr; |
22034 | } | |
757a13d0 | 22035 | |
cf2c3c16 | 22036 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22037 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22038 | |
22039 | static void | |
d521ce57 TT |
22040 | dwarf_decode_macro_bytes (bfd *abfd, |
22041 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22042 | struct macro_source_file *current_file, |
43f3e411 | 22043 | struct line_header *lh, |
cf2c3c16 | 22044 | struct dwarf2_section_info *section, |
36586728 | 22045 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22046 | unsigned int offset_size, |
8fc3fc34 | 22047 | htab_t include_hash) |
cf2c3c16 | 22048 | { |
4d663531 | 22049 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22050 | enum dwarf_macro_record_type macinfo_type; |
22051 | int at_commandline; | |
d521ce57 | 22052 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22053 | |
cf2c3c16 TT |
22054 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22055 | &offset_size, section_is_gnu); | |
22056 | if (mac_ptr == NULL) | |
22057 | { | |
22058 | /* We already issued a complaint. */ | |
22059 | return; | |
22060 | } | |
757a13d0 JK |
22061 | |
22062 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22063 | GDB is still reading the definitions from command line. First | |
22064 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22065 | to create CURRENT_FILE for the main source holding also the command line | |
22066 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22067 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22068 | ||
22069 | at_commandline = 1; | |
22070 | ||
22071 | do | |
22072 | { | |
22073 | /* Do we at least have room for a macinfo type byte? */ | |
22074 | if (mac_ptr >= mac_end) | |
22075 | { | |
f664829e | 22076 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22077 | break; |
22078 | } | |
22079 | ||
aead7601 | 22080 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22081 | mac_ptr++; |
22082 | ||
cf2c3c16 TT |
22083 | /* Note that we rely on the fact that the corresponding GNU and |
22084 | DWARF constants are the same. */ | |
757a13d0 JK |
22085 | switch (macinfo_type) |
22086 | { | |
22087 | /* A zero macinfo type indicates the end of the macro | |
22088 | information. */ | |
22089 | case 0: | |
22090 | break; | |
2e276125 | 22091 | |
0af92d60 JK |
22092 | case DW_MACRO_define: |
22093 | case DW_MACRO_undef: | |
22094 | case DW_MACRO_define_strp: | |
22095 | case DW_MACRO_undef_strp: | |
22096 | case DW_MACRO_define_sup: | |
22097 | case DW_MACRO_undef_sup: | |
2e276125 | 22098 | { |
891d2f0b | 22099 | unsigned int bytes_read; |
2e276125 | 22100 | int line; |
d521ce57 | 22101 | const char *body; |
cf2c3c16 | 22102 | int is_define; |
2e276125 | 22103 | |
cf2c3c16 TT |
22104 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22105 | mac_ptr += bytes_read; | |
22106 | ||
0af92d60 JK |
22107 | if (macinfo_type == DW_MACRO_define |
22108 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22109 | { |
22110 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22111 | mac_ptr += bytes_read; | |
22112 | } | |
22113 | else | |
22114 | { | |
22115 | LONGEST str_offset; | |
22116 | ||
22117 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22118 | mac_ptr += offset_size; | |
2e276125 | 22119 | |
0af92d60 JK |
22120 | if (macinfo_type == DW_MACRO_define_sup |
22121 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22122 | || section_is_dwz) |
36586728 TT |
22123 | { |
22124 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22125 | ||
22126 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22127 | } | |
22128 | else | |
22129 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22130 | } |
22131 | ||
0af92d60 JK |
22132 | is_define = (macinfo_type == DW_MACRO_define |
22133 | || macinfo_type == DW_MACRO_define_strp | |
22134 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22135 | if (! current_file) |
757a13d0 JK |
22136 | { |
22137 | /* DWARF violation as no main source is present. */ | |
22138 | complaint (&symfile_complaints, | |
22139 | _("debug info with no main source gives macro %s " | |
22140 | "on line %d: %s"), | |
cf2c3c16 TT |
22141 | is_define ? _("definition") : _("undefinition"), |
22142 | line, body); | |
757a13d0 JK |
22143 | break; |
22144 | } | |
3e43a32a MS |
22145 | if ((line == 0 && !at_commandline) |
22146 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22147 | complaint (&symfile_complaints, |
757a13d0 JK |
22148 | _("debug info gives %s macro %s with %s line %d: %s"), |
22149 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22150 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22151 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22152 | ||
cf2c3c16 | 22153 | if (is_define) |
757a13d0 | 22154 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22155 | else |
22156 | { | |
0af92d60 JK |
22157 | gdb_assert (macinfo_type == DW_MACRO_undef |
22158 | || macinfo_type == DW_MACRO_undef_strp | |
22159 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22160 | macro_undef (current_file, line, body); |
22161 | } | |
2e276125 JB |
22162 | } |
22163 | break; | |
22164 | ||
0af92d60 | 22165 | case DW_MACRO_start_file: |
2e276125 | 22166 | { |
891d2f0b | 22167 | unsigned int bytes_read; |
2e276125 JB |
22168 | int line, file; |
22169 | ||
22170 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22171 | mac_ptr += bytes_read; | |
22172 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22173 | mac_ptr += bytes_read; | |
22174 | ||
3e43a32a MS |
22175 | if ((line == 0 && !at_commandline) |
22176 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
22177 | complaint (&symfile_complaints, |
22178 | _("debug info gives source %d included " | |
22179 | "from %s at %s line %d"), | |
22180 | file, at_commandline ? _("command-line") : _("file"), | |
22181 | line == 0 ? _("zero") : _("non-zero"), line); | |
22182 | ||
22183 | if (at_commandline) | |
22184 | { | |
0af92d60 | 22185 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 22186 | pass one. */ |
757a13d0 JK |
22187 | at_commandline = 0; |
22188 | } | |
22189 | else | |
43f3e411 | 22190 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
22191 | } |
22192 | break; | |
22193 | ||
0af92d60 | 22194 | case DW_MACRO_end_file: |
2e276125 | 22195 | if (! current_file) |
4d3c2250 | 22196 | complaint (&symfile_complaints, |
3e43a32a MS |
22197 | _("macro debug info has an unmatched " |
22198 | "`close_file' directive")); | |
2e276125 JB |
22199 | else |
22200 | { | |
22201 | current_file = current_file->included_by; | |
22202 | if (! current_file) | |
22203 | { | |
cf2c3c16 | 22204 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
22205 | |
22206 | /* GCC circa March 2002 doesn't produce the zero | |
22207 | type byte marking the end of the compilation | |
22208 | unit. Complain if it's not there, but exit no | |
22209 | matter what. */ | |
22210 | ||
22211 | /* Do we at least have room for a macinfo type byte? */ | |
22212 | if (mac_ptr >= mac_end) | |
22213 | { | |
f664829e | 22214 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
22215 | return; |
22216 | } | |
22217 | ||
22218 | /* We don't increment mac_ptr here, so this is just | |
22219 | a look-ahead. */ | |
aead7601 SM |
22220 | next_type |
22221 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
22222 | mac_ptr); | |
2e276125 | 22223 | if (next_type != 0) |
4d3c2250 | 22224 | complaint (&symfile_complaints, |
3e43a32a MS |
22225 | _("no terminating 0-type entry for " |
22226 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
22227 | |
22228 | return; | |
22229 | } | |
22230 | } | |
22231 | break; | |
22232 | ||
0af92d60 JK |
22233 | case DW_MACRO_import: |
22234 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
22235 | { |
22236 | LONGEST offset; | |
8fc3fc34 | 22237 | void **slot; |
a036ba48 TT |
22238 | bfd *include_bfd = abfd; |
22239 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 22240 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 22241 | int is_dwz = section_is_dwz; |
d521ce57 | 22242 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
22243 | |
22244 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22245 | mac_ptr += offset_size; | |
22246 | ||
0af92d60 | 22247 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
22248 | { |
22249 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22250 | ||
4d663531 | 22251 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 22252 | |
a036ba48 | 22253 | include_section = &dwz->macro; |
a32a8923 | 22254 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
22255 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
22256 | is_dwz = 1; | |
22257 | } | |
22258 | ||
22259 | new_mac_ptr = include_section->buffer + offset; | |
22260 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
22261 | ||
8fc3fc34 TT |
22262 | if (*slot != NULL) |
22263 | { | |
22264 | /* This has actually happened; see | |
22265 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
22266 | complaint (&symfile_complaints, | |
0af92d60 | 22267 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
22268 | ".debug_macro section")); |
22269 | } | |
22270 | else | |
22271 | { | |
d521ce57 | 22272 | *slot = (void *) new_mac_ptr; |
36586728 | 22273 | |
a036ba48 | 22274 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 22275 | include_mac_end, current_file, lh, |
36586728 | 22276 | section, section_is_gnu, is_dwz, |
4d663531 | 22277 | offset_size, include_hash); |
8fc3fc34 | 22278 | |
d521ce57 | 22279 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 22280 | } |
cf2c3c16 TT |
22281 | } |
22282 | break; | |
22283 | ||
2e276125 | 22284 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
22285 | if (!section_is_gnu) |
22286 | { | |
22287 | unsigned int bytes_read; | |
2e276125 | 22288 | |
ac298888 TT |
22289 | /* This reads the constant, but since we don't recognize |
22290 | any vendor extensions, we ignore it. */ | |
22291 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
22292 | mac_ptr += bytes_read; |
22293 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22294 | mac_ptr += bytes_read; | |
2e276125 | 22295 | |
cf2c3c16 TT |
22296 | /* We don't recognize any vendor extensions. */ |
22297 | break; | |
22298 | } | |
22299 | /* FALLTHROUGH */ | |
22300 | ||
22301 | default: | |
22302 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22303 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22304 | section); |
22305 | if (mac_ptr == NULL) | |
22306 | return; | |
22307 | break; | |
2e276125 | 22308 | } |
757a13d0 | 22309 | } while (macinfo_type != 0); |
2e276125 | 22310 | } |
8e19ed76 | 22311 | |
cf2c3c16 | 22312 | static void |
09262596 | 22313 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 22314 | int section_is_gnu) |
cf2c3c16 | 22315 | { |
bb5ed363 | 22316 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
22317 | struct line_header *lh = cu->line_header; |
22318 | bfd *abfd; | |
d521ce57 | 22319 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
22320 | struct macro_source_file *current_file = 0; |
22321 | enum dwarf_macro_record_type macinfo_type; | |
22322 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 22323 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 22324 | struct cleanup *cleanup; |
8fc3fc34 | 22325 | void **slot; |
09262596 DE |
22326 | struct dwarf2_section_info *section; |
22327 | const char *section_name; | |
22328 | ||
22329 | if (cu->dwo_unit != NULL) | |
22330 | { | |
22331 | if (section_is_gnu) | |
22332 | { | |
22333 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
22334 | section_name = ".debug_macro.dwo"; | |
22335 | } | |
22336 | else | |
22337 | { | |
22338 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
22339 | section_name = ".debug_macinfo.dwo"; | |
22340 | } | |
22341 | } | |
22342 | else | |
22343 | { | |
22344 | if (section_is_gnu) | |
22345 | { | |
22346 | section = &dwarf2_per_objfile->macro; | |
22347 | section_name = ".debug_macro"; | |
22348 | } | |
22349 | else | |
22350 | { | |
22351 | section = &dwarf2_per_objfile->macinfo; | |
22352 | section_name = ".debug_macinfo"; | |
22353 | } | |
22354 | } | |
cf2c3c16 | 22355 | |
bb5ed363 | 22356 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
22357 | if (section->buffer == NULL) |
22358 | { | |
fceca515 | 22359 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
22360 | return; |
22361 | } | |
a32a8923 | 22362 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
22363 | |
22364 | /* First pass: Find the name of the base filename. | |
22365 | This filename is needed in order to process all macros whose definition | |
22366 | (or undefinition) comes from the command line. These macros are defined | |
22367 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
22368 | associated to the base file. | |
22369 | ||
22370 | To determine the base file name, we scan the macro definitions until we | |
22371 | reach the first DW_MACINFO_start_file entry. We then initialize | |
22372 | CURRENT_FILE accordingly so that any macro definition found before the | |
22373 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
22374 | ||
22375 | mac_ptr = section->buffer + offset; | |
22376 | mac_end = section->buffer + section->size; | |
22377 | ||
22378 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
22379 | &offset_size, section_is_gnu); | |
22380 | if (mac_ptr == NULL) | |
22381 | { | |
22382 | /* We already issued a complaint. */ | |
22383 | return; | |
22384 | } | |
22385 | ||
22386 | do | |
22387 | { | |
22388 | /* Do we at least have room for a macinfo type byte? */ | |
22389 | if (mac_ptr >= mac_end) | |
22390 | { | |
22391 | /* Complaint is printed during the second pass as GDB will probably | |
22392 | stop the first pass earlier upon finding | |
22393 | DW_MACINFO_start_file. */ | |
22394 | break; | |
22395 | } | |
22396 | ||
aead7601 | 22397 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
22398 | mac_ptr++; |
22399 | ||
22400 | /* Note that we rely on the fact that the corresponding GNU and | |
22401 | DWARF constants are the same. */ | |
22402 | switch (macinfo_type) | |
22403 | { | |
22404 | /* A zero macinfo type indicates the end of the macro | |
22405 | information. */ | |
22406 | case 0: | |
22407 | break; | |
22408 | ||
0af92d60 JK |
22409 | case DW_MACRO_define: |
22410 | case DW_MACRO_undef: | |
cf2c3c16 TT |
22411 | /* Only skip the data by MAC_PTR. */ |
22412 | { | |
22413 | unsigned int bytes_read; | |
22414 | ||
22415 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22416 | mac_ptr += bytes_read; | |
22417 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22418 | mac_ptr += bytes_read; | |
22419 | } | |
22420 | break; | |
22421 | ||
0af92d60 | 22422 | case DW_MACRO_start_file: |
cf2c3c16 TT |
22423 | { |
22424 | unsigned int bytes_read; | |
22425 | int line, file; | |
22426 | ||
22427 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22428 | mac_ptr += bytes_read; | |
22429 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22430 | mac_ptr += bytes_read; | |
22431 | ||
43f3e411 | 22432 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
22433 | } |
22434 | break; | |
22435 | ||
0af92d60 | 22436 | case DW_MACRO_end_file: |
cf2c3c16 TT |
22437 | /* No data to skip by MAC_PTR. */ |
22438 | break; | |
22439 | ||
0af92d60 JK |
22440 | case DW_MACRO_define_strp: |
22441 | case DW_MACRO_undef_strp: | |
22442 | case DW_MACRO_define_sup: | |
22443 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
22444 | { |
22445 | unsigned int bytes_read; | |
22446 | ||
22447 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22448 | mac_ptr += bytes_read; | |
22449 | mac_ptr += offset_size; | |
22450 | } | |
22451 | break; | |
22452 | ||
0af92d60 JK |
22453 | case DW_MACRO_import: |
22454 | case DW_MACRO_import_sup: | |
cf2c3c16 | 22455 | /* Note that, according to the spec, a transparent include |
0af92d60 | 22456 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
22457 | skip this opcode. */ |
22458 | mac_ptr += offset_size; | |
22459 | break; | |
22460 | ||
22461 | case DW_MACINFO_vendor_ext: | |
22462 | /* Only skip the data by MAC_PTR. */ | |
22463 | if (!section_is_gnu) | |
22464 | { | |
22465 | unsigned int bytes_read; | |
22466 | ||
22467 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22468 | mac_ptr += bytes_read; | |
22469 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22470 | mac_ptr += bytes_read; | |
22471 | } | |
22472 | /* FALLTHROUGH */ | |
22473 | ||
22474 | default: | |
22475 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22476 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22477 | section); |
22478 | if (mac_ptr == NULL) | |
22479 | return; | |
22480 | break; | |
22481 | } | |
22482 | } while (macinfo_type != 0 && current_file == NULL); | |
22483 | ||
22484 | /* Second pass: Process all entries. | |
22485 | ||
22486 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
22487 | command-line macro definitions/undefinitions. This flag is unset when we | |
22488 | reach the first DW_MACINFO_start_file entry. */ | |
22489 | ||
fc4007c9 TT |
22490 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
22491 | htab_eq_pointer, | |
22492 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 22493 | mac_ptr = section->buffer + offset; |
fc4007c9 | 22494 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 22495 | *slot = (void *) mac_ptr; |
8fc3fc34 | 22496 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 22497 | current_file, lh, section, |
fc4007c9 TT |
22498 | section_is_gnu, 0, offset_size, |
22499 | include_hash.get ()); | |
cf2c3c16 TT |
22500 | } |
22501 | ||
8e19ed76 | 22502 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 22503 | if so return true else false. */ |
380bca97 | 22504 | |
8e19ed76 | 22505 | static int |
6e5a29e1 | 22506 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
22507 | { |
22508 | return (attr == NULL ? 0 : | |
22509 | attr->form == DW_FORM_block1 | |
22510 | || attr->form == DW_FORM_block2 | |
22511 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
22512 | || attr->form == DW_FORM_block |
22513 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 22514 | } |
4c2df51b | 22515 | |
c6a0999f JB |
22516 | /* Return non-zero if ATTR's value is a section offset --- classes |
22517 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
22518 | You may use DW_UNSND (attr) to retrieve such offsets. | |
22519 | ||
22520 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
22521 | may have a value that belongs to more than one of these classes; it | |
22522 | would be ambiguous if we did, because we use the same forms for all | |
22523 | of them. */ | |
380bca97 | 22524 | |
3690dd37 | 22525 | static int |
6e5a29e1 | 22526 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
22527 | { |
22528 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
22529 | || attr->form == DW_FORM_data8 |
22530 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
22531 | } |
22532 | ||
3690dd37 JB |
22533 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
22534 | zero otherwise. When this function returns true, you can apply | |
22535 | dwarf2_get_attr_constant_value to it. | |
22536 | ||
22537 | However, note that for some attributes you must check | |
22538 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
22539 | and DW_FORM_data8 are members of both the constant class, and of | |
22540 | the classes that contain offsets into other debug sections | |
22541 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
22542 | that, if an attribute's can be either a constant or one of the | |
22543 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
22544 | taken as section offsets, not constants. |
22545 | ||
22546 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
22547 | cannot handle that. */ | |
380bca97 | 22548 | |
3690dd37 | 22549 | static int |
6e5a29e1 | 22550 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
22551 | { |
22552 | switch (attr->form) | |
22553 | { | |
22554 | case DW_FORM_sdata: | |
22555 | case DW_FORM_udata: | |
22556 | case DW_FORM_data1: | |
22557 | case DW_FORM_data2: | |
22558 | case DW_FORM_data4: | |
22559 | case DW_FORM_data8: | |
663c44ac | 22560 | case DW_FORM_implicit_const: |
3690dd37 JB |
22561 | return 1; |
22562 | default: | |
22563 | return 0; | |
22564 | } | |
22565 | } | |
22566 | ||
7771576e SA |
22567 | |
22568 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
22569 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
22570 | ||
22571 | static int | |
6e5a29e1 | 22572 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
22573 | { |
22574 | switch (attr->form) | |
22575 | { | |
22576 | case DW_FORM_ref_addr: | |
22577 | case DW_FORM_ref1: | |
22578 | case DW_FORM_ref2: | |
22579 | case DW_FORM_ref4: | |
22580 | case DW_FORM_ref8: | |
22581 | case DW_FORM_ref_udata: | |
22582 | case DW_FORM_GNU_ref_alt: | |
22583 | return 1; | |
22584 | default: | |
22585 | return 0; | |
22586 | } | |
22587 | } | |
22588 | ||
3019eac3 DE |
22589 | /* Return the .debug_loc section to use for CU. |
22590 | For DWO files use .debug_loc.dwo. */ | |
22591 | ||
22592 | static struct dwarf2_section_info * | |
22593 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
22594 | { | |
22595 | if (cu->dwo_unit) | |
43988095 JK |
22596 | { |
22597 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
22598 | ||
22599 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
22600 | } | |
22601 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
22602 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
22603 | } |
22604 | ||
8cf6f0b1 TT |
22605 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
22606 | ||
22607 | static void | |
22608 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
22609 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 22610 | const struct attribute *attr) |
8cf6f0b1 | 22611 | { |
3019eac3 DE |
22612 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
22613 | ||
22614 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
22615 | |
22616 | baton->per_cu = cu->per_cu; | |
22617 | gdb_assert (baton->per_cu); | |
22618 | /* We don't know how long the location list is, but make sure we | |
22619 | don't run off the edge of the section. */ | |
3019eac3 DE |
22620 | baton->size = section->size - DW_UNSND (attr); |
22621 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 22622 | baton->base_address = cu->base_address; |
f664829e | 22623 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
22624 | } |
22625 | ||
4c2df51b | 22626 | static void |
ff39bb5e | 22627 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 22628 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 22629 | { |
bb5ed363 | 22630 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 22631 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 22632 | |
3690dd37 | 22633 | if (attr_form_is_section_offset (attr) |
3019eac3 | 22634 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
22635 | the section. If so, fall through to the complaint in the |
22636 | other branch. */ | |
3019eac3 | 22637 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 22638 | { |
0d53c4c4 | 22639 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 22640 | |
8d749320 | 22641 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 22642 | |
8cf6f0b1 | 22643 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 22644 | |
d00adf39 | 22645 | if (cu->base_known == 0) |
0d53c4c4 | 22646 | complaint (&symfile_complaints, |
3e43a32a MS |
22647 | _("Location list used without " |
22648 | "specifying the CU base address.")); | |
4c2df51b | 22649 | |
f1e6e072 TT |
22650 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22651 | ? dwarf2_loclist_block_index | |
22652 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
22653 | SYMBOL_LOCATION_BATON (sym) = baton; |
22654 | } | |
22655 | else | |
22656 | { | |
22657 | struct dwarf2_locexpr_baton *baton; | |
22658 | ||
8d749320 | 22659 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
22660 | baton->per_cu = cu->per_cu; |
22661 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
22662 | |
22663 | if (attr_form_is_block (attr)) | |
22664 | { | |
22665 | /* Note that we're just copying the block's data pointer | |
22666 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
22667 | info_buffer for SYM's objfile; right now we never release |
22668 | that buffer, but when we do clean up properly this may | |
22669 | need to change. */ | |
0d53c4c4 DJ |
22670 | baton->size = DW_BLOCK (attr)->size; |
22671 | baton->data = DW_BLOCK (attr)->data; | |
22672 | } | |
22673 | else | |
22674 | { | |
22675 | dwarf2_invalid_attrib_class_complaint ("location description", | |
22676 | SYMBOL_NATURAL_NAME (sym)); | |
22677 | baton->size = 0; | |
0d53c4c4 | 22678 | } |
6e70227d | 22679 | |
f1e6e072 TT |
22680 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22681 | ? dwarf2_locexpr_block_index | |
22682 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
22683 | SYMBOL_LOCATION_BATON (sym) = baton; |
22684 | } | |
4c2df51b | 22685 | } |
6502dd73 | 22686 | |
9aa1f1e3 TT |
22687 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
22688 | came from a separate debuginfo file, then the master objfile is | |
22689 | returned. */ | |
ae0d2f24 UW |
22690 | |
22691 | struct objfile * | |
22692 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
22693 | { | |
9291a0cd | 22694 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
22695 | |
22696 | /* Return the master objfile, so that we can report and look up the | |
22697 | correct file containing this variable. */ | |
22698 | if (objfile->separate_debug_objfile_backlink) | |
22699 | objfile = objfile->separate_debug_objfile_backlink; | |
22700 | ||
22701 | return objfile; | |
22702 | } | |
22703 | ||
96408a79 SA |
22704 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
22705 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
22706 | CU_HEADERP first. */ | |
22707 | ||
22708 | static const struct comp_unit_head * | |
22709 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
22710 | struct dwarf2_per_cu_data *per_cu) | |
22711 | { | |
d521ce57 | 22712 | const gdb_byte *info_ptr; |
96408a79 SA |
22713 | |
22714 | if (per_cu->cu) | |
22715 | return &per_cu->cu->header; | |
22716 | ||
9c541725 | 22717 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
22718 | |
22719 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
22720 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
22721 | rcuh_kind::COMPILE); | |
96408a79 SA |
22722 | |
22723 | return cu_headerp; | |
22724 | } | |
22725 | ||
ae0d2f24 UW |
22726 | /* Return the address size given in the compilation unit header for CU. */ |
22727 | ||
98714339 | 22728 | int |
ae0d2f24 UW |
22729 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
22730 | { | |
96408a79 SA |
22731 | struct comp_unit_head cu_header_local; |
22732 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 22733 | |
96408a79 SA |
22734 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22735 | ||
22736 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
22737 | } |
22738 | ||
9eae7c52 TT |
22739 | /* Return the offset size given in the compilation unit header for CU. */ |
22740 | ||
22741 | int | |
22742 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
22743 | { | |
96408a79 SA |
22744 | struct comp_unit_head cu_header_local; |
22745 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 22746 | |
96408a79 SA |
22747 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22748 | ||
22749 | return cu_headerp->offset_size; | |
22750 | } | |
22751 | ||
22752 | /* See its dwarf2loc.h declaration. */ | |
22753 | ||
22754 | int | |
22755 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22756 | { | |
22757 | struct comp_unit_head cu_header_local; | |
22758 | const struct comp_unit_head *cu_headerp; | |
22759 | ||
22760 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22761 | ||
22762 | if (cu_headerp->version == 2) | |
22763 | return cu_headerp->addr_size; | |
22764 | else | |
22765 | return cu_headerp->offset_size; | |
181cebd4 JK |
22766 | } |
22767 | ||
9aa1f1e3 TT |
22768 | /* Return the text offset of the CU. The returned offset comes from |
22769 | this CU's objfile. If this objfile came from a separate debuginfo | |
22770 | file, then the offset may be different from the corresponding | |
22771 | offset in the parent objfile. */ | |
22772 | ||
22773 | CORE_ADDR | |
22774 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22775 | { | |
bb3fa9d0 | 22776 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22777 | |
22778 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22779 | } | |
22780 | ||
43988095 JK |
22781 | /* Return DWARF version number of PER_CU. */ |
22782 | ||
22783 | short | |
22784 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
22785 | { | |
22786 | return per_cu->dwarf_version; | |
22787 | } | |
22788 | ||
348e048f DE |
22789 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22790 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22791 | |
22792 | static struct dwarf2_per_cu_data * | |
9c541725 | 22793 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 22794 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22795 | struct objfile *objfile) |
22796 | { | |
22797 | struct dwarf2_per_cu_data *this_cu; | |
22798 | int low, high; | |
36586728 | 22799 | const sect_offset *cu_off; |
ae038cb0 | 22800 | |
ae038cb0 DJ |
22801 | low = 0; |
22802 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22803 | while (high > low) | |
22804 | { | |
36586728 | 22805 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22806 | int mid = low + (high - low) / 2; |
9a619af0 | 22807 | |
36586728 | 22808 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 22809 | cu_off = &mid_cu->sect_off; |
36586728 | 22810 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 22811 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
22812 | high = mid; |
22813 | else | |
22814 | low = mid + 1; | |
22815 | } | |
22816 | gdb_assert (low == high); | |
36586728 | 22817 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
22818 | cu_off = &this_cu->sect_off; |
22819 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 22820 | { |
36586728 | 22821 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 22822 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
22823 | "offset 0x%x [in module %s]"), |
22824 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 22825 | |
9c541725 PA |
22826 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
22827 | <= sect_off); | |
ae038cb0 DJ |
22828 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22829 | } | |
22830 | else | |
22831 | { | |
22832 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22833 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
22834 | && sect_off >= this_cu->sect_off + this_cu->length) |
22835 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
22836 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
22837 | return this_cu; |
22838 | } | |
22839 | } | |
22840 | ||
23745b47 | 22841 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22842 | |
9816fde3 | 22843 | static void |
23745b47 | 22844 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22845 | { |
9816fde3 | 22846 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22847 | per_cu->cu = cu; |
22848 | cu->per_cu = per_cu; | |
22849 | cu->objfile = per_cu->objfile; | |
93311388 | 22850 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22851 | } |
22852 | ||
22853 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22854 | ||
22855 | static void | |
95554aad TT |
22856 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22857 | enum language pretend_language) | |
9816fde3 JK |
22858 | { |
22859 | struct attribute *attr; | |
22860 | ||
22861 | /* Set the language we're debugging. */ | |
22862 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22863 | if (attr) | |
22864 | set_cu_language (DW_UNSND (attr), cu); | |
22865 | else | |
9cded63f | 22866 | { |
95554aad | 22867 | cu->language = pretend_language; |
9cded63f TT |
22868 | cu->language_defn = language_def (cu->language); |
22869 | } | |
dee91e82 | 22870 | |
7d45c7c3 | 22871 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22872 | } |
22873 | ||
ae038cb0 DJ |
22874 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22875 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22876 | the caller is responsible for that. |
22877 | NOTE: DATA is a void * because this function is also used as a | |
22878 | cleanup routine. */ | |
ae038cb0 DJ |
22879 | |
22880 | static void | |
68dc6402 | 22881 | free_heap_comp_unit (void *data) |
ae038cb0 | 22882 | { |
9a3c8263 | 22883 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22884 | |
23745b47 DE |
22885 | gdb_assert (cu->per_cu != NULL); |
22886 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22887 | cu->per_cu = NULL; |
22888 | ||
22889 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22890 | ||
22891 | xfree (cu); | |
22892 | } | |
22893 | ||
72bf9492 | 22894 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22895 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22896 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22897 | |
22898 | static void | |
22899 | free_stack_comp_unit (void *data) | |
22900 | { | |
9a3c8263 | 22901 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22902 | |
23745b47 DE |
22903 | gdb_assert (cu->per_cu != NULL); |
22904 | cu->per_cu->cu = NULL; | |
22905 | cu->per_cu = NULL; | |
22906 | ||
72bf9492 DJ |
22907 | obstack_free (&cu->comp_unit_obstack, NULL); |
22908 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22909 | } |
22910 | ||
22911 | /* Free all cached compilation units. */ | |
22912 | ||
22913 | static void | |
22914 | free_cached_comp_units (void *data) | |
22915 | { | |
330cdd98 | 22916 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
22917 | } |
22918 | ||
22919 | /* Increase the age counter on each cached compilation unit, and free | |
22920 | any that are too old. */ | |
22921 | ||
22922 | static void | |
22923 | age_cached_comp_units (void) | |
22924 | { | |
22925 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22926 | ||
22927 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22928 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22929 | while (per_cu != NULL) | |
22930 | { | |
22931 | per_cu->cu->last_used ++; | |
b4f54984 | 22932 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22933 | dwarf2_mark (per_cu->cu); |
22934 | per_cu = per_cu->cu->read_in_chain; | |
22935 | } | |
22936 | ||
22937 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22938 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22939 | while (per_cu != NULL) | |
22940 | { | |
22941 | struct dwarf2_per_cu_data *next_cu; | |
22942 | ||
22943 | next_cu = per_cu->cu->read_in_chain; | |
22944 | ||
22945 | if (!per_cu->cu->mark) | |
22946 | { | |
68dc6402 | 22947 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22948 | *last_chain = next_cu; |
22949 | } | |
22950 | else | |
22951 | last_chain = &per_cu->cu->read_in_chain; | |
22952 | ||
22953 | per_cu = next_cu; | |
22954 | } | |
22955 | } | |
22956 | ||
22957 | /* Remove a single compilation unit from the cache. */ | |
22958 | ||
22959 | static void | |
dee91e82 | 22960 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22961 | { |
22962 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22963 | ||
22964 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22965 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22966 | while (per_cu != NULL) | |
22967 | { | |
22968 | struct dwarf2_per_cu_data *next_cu; | |
22969 | ||
22970 | next_cu = per_cu->cu->read_in_chain; | |
22971 | ||
dee91e82 | 22972 | if (per_cu == target_per_cu) |
ae038cb0 | 22973 | { |
68dc6402 | 22974 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22975 | per_cu->cu = NULL; |
ae038cb0 DJ |
22976 | *last_chain = next_cu; |
22977 | break; | |
22978 | } | |
22979 | else | |
22980 | last_chain = &per_cu->cu->read_in_chain; | |
22981 | ||
22982 | per_cu = next_cu; | |
22983 | } | |
22984 | } | |
22985 | ||
fe3e1990 DJ |
22986 | /* Release all extra memory associated with OBJFILE. */ |
22987 | ||
22988 | void | |
22989 | dwarf2_free_objfile (struct objfile *objfile) | |
22990 | { | |
9a3c8263 SM |
22991 | dwarf2_per_objfile |
22992 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22993 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22994 | |
22995 | if (dwarf2_per_objfile == NULL) | |
22996 | return; | |
22997 | ||
330cdd98 | 22998 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
22999 | } |
23000 | ||
dee91e82 DE |
23001 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23002 | We store these in a hash table separate from the DIEs, and preserve them | |
23003 | when the DIEs are flushed out of cache. | |
23004 | ||
23005 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23006 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23007 | or the type may come from a DWO file. Furthermore, while it's more logical |
23008 | to use per_cu->section+offset, with Fission the section with the data is in | |
23009 | the DWO file but we don't know that section at the point we need it. | |
23010 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23011 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23012 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23013 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23014 | |
dee91e82 | 23015 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23016 | { |
dee91e82 | 23017 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23018 | sect_offset sect_off; |
1c379e20 DJ |
23019 | struct type *type; |
23020 | }; | |
23021 | ||
dee91e82 | 23022 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23023 | |
23024 | static hashval_t | |
dee91e82 | 23025 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23026 | { |
9a3c8263 SM |
23027 | const struct dwarf2_per_cu_offset_and_type *ofs |
23028 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23029 | |
9c541725 | 23030 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23031 | } |
23032 | ||
dee91e82 | 23033 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23034 | |
23035 | static int | |
dee91e82 | 23036 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23037 | { |
9a3c8263 SM |
23038 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23039 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23040 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23041 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23042 | |
dee91e82 | 23043 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23044 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23045 | } |
23046 | ||
23047 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23048 | table if necessary. For convenience, return TYPE. |
23049 | ||
23050 | The DIEs reading must have careful ordering to: | |
23051 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23052 | reading current DIE. | |
23053 | * Not trying to dereference contents of still incompletely read in types | |
23054 | while reading in other DIEs. | |
23055 | * Enable referencing still incompletely read in types just by a pointer to | |
23056 | the type without accessing its fields. | |
23057 | ||
23058 | Therefore caller should follow these rules: | |
23059 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23060 | before building the type and calling set_die_type. | |
e71ec853 | 23061 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23062 | possible before fetching more types to complete the current type. |
23063 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23064 | |
f792889a | 23065 | static struct type * |
1c379e20 DJ |
23066 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23067 | { | |
dee91e82 | 23068 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23069 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23070 | struct attribute *attr; |
23071 | struct dynamic_prop prop; | |
1c379e20 | 23072 | |
b4ba55a1 JB |
23073 | /* For Ada types, make sure that the gnat-specific data is always |
23074 | initialized (if not already set). There are a few types where | |
23075 | we should not be doing so, because the type-specific area is | |
23076 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23077 | where the type-specific area is used to store the floatformat). | |
23078 | But this is not a problem, because the gnat-specific information | |
23079 | is actually not needed for these types. */ | |
23080 | if (need_gnat_info (cu) | |
23081 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23082 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23083 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23084 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23085 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23086 | && !HAVE_GNAT_AUX_INFO (type)) |
23087 | INIT_GNAT_SPECIFIC (type); | |
23088 | ||
3f2f83dd KB |
23089 | /* Read DW_AT_allocated and set in type. */ |
23090 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23091 | if (attr_form_is_block (attr)) | |
23092 | { | |
23093 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23094 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23095 | } | |
23096 | else if (attr != NULL) | |
23097 | { | |
23098 | complaint (&symfile_complaints, | |
9c541725 PA |
23099 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23100 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23101 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23102 | } |
23103 | ||
23104 | /* Read DW_AT_associated and set in type. */ | |
23105 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23106 | if (attr_form_is_block (attr)) | |
23107 | { | |
23108 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23109 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23110 | } | |
23111 | else if (attr != NULL) | |
23112 | { | |
23113 | complaint (&symfile_complaints, | |
9c541725 PA |
23114 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23115 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23116 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23117 | } |
23118 | ||
3cdcd0ce JB |
23119 | /* Read DW_AT_data_location and set in type. */ |
23120 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23121 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23122 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23123 | |
dee91e82 | 23124 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23125 | { |
dee91e82 DE |
23126 | dwarf2_per_objfile->die_type_hash = |
23127 | htab_create_alloc_ex (127, | |
23128 | per_cu_offset_and_type_hash, | |
23129 | per_cu_offset_and_type_eq, | |
23130 | NULL, | |
23131 | &objfile->objfile_obstack, | |
23132 | hashtab_obstack_allocate, | |
23133 | dummy_obstack_deallocate); | |
f792889a | 23134 | } |
1c379e20 | 23135 | |
dee91e82 | 23136 | ofs.per_cu = cu->per_cu; |
9c541725 | 23137 | ofs.sect_off = die->sect_off; |
1c379e20 | 23138 | ofs.type = type; |
dee91e82 DE |
23139 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23140 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23141 | if (*slot) |
23142 | complaint (&symfile_complaints, | |
23143 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23144 | to_underlying (die->sect_off)); |
8d749320 SM |
23145 | *slot = XOBNEW (&objfile->objfile_obstack, |
23146 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23147 | **slot = ofs; |
f792889a | 23148 | return type; |
1c379e20 DJ |
23149 | } |
23150 | ||
9c541725 | 23151 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23152 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23153 | |
23154 | static struct type * | |
9c541725 | 23155 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23156 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23157 | { |
dee91e82 | 23158 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23159 | |
dee91e82 | 23160 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23161 | return NULL; |
1c379e20 | 23162 | |
dee91e82 | 23163 | ofs.per_cu = per_cu; |
9c541725 | 23164 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23165 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23166 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23167 | if (slot) |
23168 | return slot->type; | |
23169 | else | |
23170 | return NULL; | |
23171 | } | |
23172 | ||
02142a6c | 23173 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23174 | or return NULL if DIE does not have a saved type. */ |
23175 | ||
23176 | static struct type * | |
23177 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23178 | { | |
9c541725 | 23179 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23180 | } |
23181 | ||
10b3939b DJ |
23182 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23183 | ||
23184 | static void | |
23185 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23186 | struct dwarf2_per_cu_data *ref_per_cu) | |
23187 | { | |
23188 | void **slot; | |
23189 | ||
23190 | if (cu->dependencies == NULL) | |
23191 | cu->dependencies | |
23192 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23193 | NULL, &cu->comp_unit_obstack, | |
23194 | hashtab_obstack_allocate, | |
23195 | dummy_obstack_deallocate); | |
23196 | ||
23197 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23198 | if (*slot == NULL) | |
23199 | *slot = ref_per_cu; | |
23200 | } | |
1c379e20 | 23201 | |
f504f079 DE |
23202 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23203 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23204 | cache that we must keep because we are keeping CU. */ |
23205 | ||
10b3939b DJ |
23206 | static int |
23207 | dwarf2_mark_helper (void **slot, void *data) | |
23208 | { | |
23209 | struct dwarf2_per_cu_data *per_cu; | |
23210 | ||
23211 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23212 | |
23213 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23214 | reading of the chain. As such dependencies remain valid it is not much | |
23215 | useful to track and undo them during QUIT cleanups. */ | |
23216 | if (per_cu->cu == NULL) | |
23217 | return 1; | |
23218 | ||
10b3939b DJ |
23219 | if (per_cu->cu->mark) |
23220 | return 1; | |
23221 | per_cu->cu->mark = 1; | |
23222 | ||
23223 | if (per_cu->cu->dependencies != NULL) | |
23224 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23225 | ||
23226 | return 1; | |
23227 | } | |
23228 | ||
f504f079 DE |
23229 | /* Set the mark field in CU and in every other compilation unit in the |
23230 | cache that we must keep because we are keeping CU. */ | |
23231 | ||
ae038cb0 DJ |
23232 | static void |
23233 | dwarf2_mark (struct dwarf2_cu *cu) | |
23234 | { | |
23235 | if (cu->mark) | |
23236 | return; | |
23237 | cu->mark = 1; | |
10b3939b DJ |
23238 | if (cu->dependencies != NULL) |
23239 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23240 | } |
23241 | ||
23242 | static void | |
23243 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23244 | { | |
23245 | while (per_cu) | |
23246 | { | |
23247 | per_cu->cu->mark = 0; | |
23248 | per_cu = per_cu->cu->read_in_chain; | |
23249 | } | |
72bf9492 DJ |
23250 | } |
23251 | ||
72bf9492 DJ |
23252 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23253 | is its offset in .debug_info for this objfile. */ | |
23254 | ||
23255 | static hashval_t | |
23256 | partial_die_hash (const void *item) | |
23257 | { | |
9a3c8263 SM |
23258 | const struct partial_die_info *part_die |
23259 | = (const struct partial_die_info *) item; | |
9a619af0 | 23260 | |
9c541725 | 23261 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23262 | } |
23263 | ||
23264 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23265 | are equal if they have the same offset. */ | |
23266 | ||
23267 | static int | |
23268 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23269 | { | |
9a3c8263 SM |
23270 | const struct partial_die_info *part_die_lhs |
23271 | = (const struct partial_die_info *) item_lhs; | |
23272 | const struct partial_die_info *part_die_rhs | |
23273 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23274 | |
9c541725 | 23275 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23276 | } |
23277 | ||
b4f54984 DE |
23278 | static struct cmd_list_element *set_dwarf_cmdlist; |
23279 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23280 | |
23281 | static void | |
b4f54984 | 23282 | set_dwarf_cmd (char *args, int from_tty) |
ae038cb0 | 23283 | { |
b4f54984 | 23284 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23285 | gdb_stdout); |
ae038cb0 DJ |
23286 | } |
23287 | ||
23288 | static void | |
b4f54984 | 23289 | show_dwarf_cmd (char *args, int from_tty) |
6e70227d | 23290 | { |
b4f54984 | 23291 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23292 | } |
23293 | ||
4bf44c1c | 23294 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
23295 | |
23296 | static void | |
c1bd65d0 | 23297 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 23298 | { |
9a3c8263 | 23299 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 23300 | int ix; |
8b70b953 | 23301 | |
626f2d1c TT |
23302 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
23303 | cleaning up. */ | |
23304 | dwarf2_per_objfile = NULL; | |
23305 | ||
59b0c7c1 JB |
23306 | for (ix = 0; ix < data->n_comp_units; ++ix) |
23307 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 23308 | |
59b0c7c1 | 23309 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 23310 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
23311 | data->all_type_units[ix]->per_cu.imported_symtabs); |
23312 | xfree (data->all_type_units); | |
95554aad | 23313 | |
8b70b953 | 23314 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
23315 | |
23316 | if (data->dwo_files) | |
23317 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
23318 | if (data->dwp_file) |
23319 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
23320 | |
23321 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
23322 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
23323 | } |
23324 | ||
23325 | \f | |
ae2de4f8 | 23326 | /* The "save gdb-index" command. */ |
9291a0cd | 23327 | |
bc8f2430 JK |
23328 | /* In-memory buffer to prepare data to be written later to a file. */ |
23329 | class data_buf | |
9291a0cd | 23330 | { |
bc8f2430 | 23331 | public: |
bc8f2430 JK |
23332 | /* Copy DATA to the end of the buffer. */ |
23333 | template<typename T> | |
23334 | void append_data (const T &data) | |
23335 | { | |
23336 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
23337 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 23338 | grow (sizeof (data))); |
bc8f2430 | 23339 | } |
b89be57b | 23340 | |
c2f134ac PA |
23341 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
23342 | terminating zero is appended too. */ | |
bc8f2430 JK |
23343 | void append_cstr0 (const char *cstr) |
23344 | { | |
23345 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
23346 | std::copy (cstr, cstr + size, grow (size)); |
23347 | } | |
23348 | ||
23349 | /* Accept a host-format integer in VAL and append it to the buffer | |
23350 | as a target-format integer which is LEN bytes long. */ | |
23351 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
23352 | { | |
23353 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 23354 | } |
9291a0cd | 23355 | |
bc8f2430 JK |
23356 | /* Return the size of the buffer. */ |
23357 | size_t size () const | |
23358 | { | |
23359 | return m_vec.size (); | |
23360 | } | |
23361 | ||
23362 | /* Write the buffer to FILE. */ | |
23363 | void file_write (FILE *file) const | |
23364 | { | |
a81e6d4d PA |
23365 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
23366 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
23367 | } |
23368 | ||
23369 | private: | |
c2f134ac PA |
23370 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
23371 | the start of the new block. */ | |
23372 | gdb_byte *grow (size_t size) | |
23373 | { | |
23374 | m_vec.resize (m_vec.size () + size); | |
23375 | return &*m_vec.end () - size; | |
23376 | } | |
23377 | ||
d5722aa2 | 23378 | gdb::byte_vector m_vec; |
bc8f2430 | 23379 | }; |
9291a0cd TT |
23380 | |
23381 | /* An entry in the symbol table. */ | |
23382 | struct symtab_index_entry | |
23383 | { | |
23384 | /* The name of the symbol. */ | |
23385 | const char *name; | |
23386 | /* The offset of the name in the constant pool. */ | |
23387 | offset_type index_offset; | |
23388 | /* A sorted vector of the indices of all the CUs that hold an object | |
23389 | of this name. */ | |
bc8f2430 | 23390 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
23391 | }; |
23392 | ||
23393 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
23394 | struct mapped_symtab | |
23395 | { | |
bc8f2430 JK |
23396 | mapped_symtab () |
23397 | { | |
23398 | data.resize (1024); | |
23399 | } | |
b89be57b | 23400 | |
bc8f2430 | 23401 | offset_type n_elements = 0; |
4b76cda9 | 23402 | std::vector<symtab_index_entry> data; |
bc8f2430 | 23403 | }; |
9291a0cd | 23404 | |
bc8f2430 | 23405 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
23406 | the slot. |
23407 | ||
23408 | Function is used only during write_hash_table so no index format backward | |
23409 | compatibility is needed. */ | |
b89be57b | 23410 | |
4b76cda9 | 23411 | static symtab_index_entry & |
9291a0cd TT |
23412 | find_slot (struct mapped_symtab *symtab, const char *name) |
23413 | { | |
559a7a62 | 23414 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 23415 | |
bc8f2430 JK |
23416 | index = hash & (symtab->data.size () - 1); |
23417 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
23418 | |
23419 | for (;;) | |
23420 | { | |
4b76cda9 PA |
23421 | if (symtab->data[index].name == NULL |
23422 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
23423 | return symtab->data[index]; |
23424 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
23425 | } |
23426 | } | |
23427 | ||
23428 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 23429 | |
9291a0cd TT |
23430 | static void |
23431 | hash_expand (struct mapped_symtab *symtab) | |
23432 | { | |
bc8f2430 | 23433 | auto old_entries = std::move (symtab->data); |
9291a0cd | 23434 | |
bc8f2430 JK |
23435 | symtab->data.clear (); |
23436 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 23437 | |
bc8f2430 | 23438 | for (auto &it : old_entries) |
4b76cda9 | 23439 | if (it.name != NULL) |
bc8f2430 | 23440 | { |
4b76cda9 | 23441 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
23442 | ref = std::move (it); |
23443 | } | |
9291a0cd TT |
23444 | } |
23445 | ||
156942c7 DE |
23446 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
23447 | CU_INDEX is the index of the CU in which the symbol appears. | |
23448 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 23449 | |
9291a0cd TT |
23450 | static void |
23451 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 23452 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
23453 | offset_type cu_index) |
23454 | { | |
156942c7 | 23455 | offset_type cu_index_and_attrs; |
9291a0cd TT |
23456 | |
23457 | ++symtab->n_elements; | |
bc8f2430 | 23458 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
23459 | hash_expand (symtab); |
23460 | ||
4b76cda9 PA |
23461 | symtab_index_entry &slot = find_slot (symtab, name); |
23462 | if (slot.name == NULL) | |
9291a0cd | 23463 | { |
4b76cda9 | 23464 | slot.name = name; |
156942c7 | 23465 | /* index_offset is set later. */ |
9291a0cd | 23466 | } |
156942c7 DE |
23467 | |
23468 | cu_index_and_attrs = 0; | |
23469 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
23470 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
23471 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
23472 | ||
23473 | /* We don't want to record an index value twice as we want to avoid the | |
23474 | duplication. | |
23475 | We process all global symbols and then all static symbols | |
23476 | (which would allow us to avoid the duplication by only having to check | |
23477 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
23478 | To keep things simple we don't worry about the duplication here and | |
23479 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 23480 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
23481 | } |
23482 | ||
23483 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
23484 | ||
23485 | static void | |
23486 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
23487 | { | |
4b76cda9 | 23488 | for (auto &entry : symtab->data) |
156942c7 | 23489 | { |
4b76cda9 | 23490 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 23491 | { |
4b76cda9 | 23492 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
23493 | std::sort (cu_indices.begin (), cu_indices.end ()); |
23494 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
23495 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
23496 | } |
23497 | } | |
9291a0cd TT |
23498 | } |
23499 | ||
bc8f2430 JK |
23500 | /* A form of 'const char *' suitable for container keys. Only the |
23501 | pointer is stored. The strings themselves are compared, not the | |
23502 | pointers. */ | |
23503 | class c_str_view | |
9291a0cd | 23504 | { |
bc8f2430 JK |
23505 | public: |
23506 | c_str_view (const char *cstr) | |
23507 | : m_cstr (cstr) | |
23508 | {} | |
9291a0cd | 23509 | |
bc8f2430 JK |
23510 | bool operator== (const c_str_view &other) const |
23511 | { | |
23512 | return strcmp (m_cstr, other.m_cstr) == 0; | |
23513 | } | |
9291a0cd | 23514 | |
bc8f2430 JK |
23515 | private: |
23516 | friend class c_str_view_hasher; | |
23517 | const char *const m_cstr; | |
23518 | }; | |
9291a0cd | 23519 | |
bc8f2430 JK |
23520 | /* A std::unordered_map::hasher for c_str_view that uses the right |
23521 | hash function for strings in a mapped index. */ | |
23522 | class c_str_view_hasher | |
23523 | { | |
23524 | public: | |
23525 | size_t operator () (const c_str_view &x) const | |
23526 | { | |
23527 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
23528 | } | |
23529 | }; | |
b89be57b | 23530 | |
bc8f2430 JK |
23531 | /* A std::unordered_map::hasher for std::vector<>. */ |
23532 | template<typename T> | |
23533 | class vector_hasher | |
9291a0cd | 23534 | { |
bc8f2430 JK |
23535 | public: |
23536 | size_t operator () (const std::vector<T> &key) const | |
23537 | { | |
23538 | return iterative_hash (key.data (), | |
23539 | sizeof (key.front ()) * key.size (), 0); | |
23540 | } | |
23541 | }; | |
9291a0cd | 23542 | |
bc8f2430 JK |
23543 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
23544 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 23545 | |
bc8f2430 JK |
23546 | static void |
23547 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
23548 | { | |
23549 | { | |
23550 | /* Elements are sorted vectors of the indices of all the CUs that | |
23551 | hold an object of this name. */ | |
23552 | std::unordered_map<std::vector<offset_type>, offset_type, | |
23553 | vector_hasher<offset_type>> | |
23554 | symbol_hash_table; | |
23555 | ||
23556 | /* We add all the index vectors to the constant pool first, to | |
23557 | ensure alignment is ok. */ | |
4b76cda9 | 23558 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 23559 | { |
4b76cda9 | 23560 | if (entry.name == NULL) |
bc8f2430 | 23561 | continue; |
4b76cda9 | 23562 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
23563 | |
23564 | /* Finding before inserting is faster than always trying to | |
23565 | insert, because inserting always allocates a node, does the | |
23566 | lookup, and then destroys the new node if another node | |
23567 | already had the same key. C++17 try_emplace will avoid | |
23568 | this. */ | |
23569 | const auto found | |
4b76cda9 | 23570 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
23571 | if (found != symbol_hash_table.end ()) |
23572 | { | |
4b76cda9 | 23573 | entry.index_offset = found->second; |
70a1152b PA |
23574 | continue; |
23575 | } | |
23576 | ||
4b76cda9 PA |
23577 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
23578 | entry.index_offset = cpool.size (); | |
23579 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
23580 | for (const auto index : entry.cu_indices) | |
23581 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
23582 | } |
23583 | } | |
9291a0cd TT |
23584 | |
23585 | /* Now write out the hash table. */ | |
bc8f2430 | 23586 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 23587 | for (const auto &entry : symtab->data) |
9291a0cd TT |
23588 | { |
23589 | offset_type str_off, vec_off; | |
23590 | ||
4b76cda9 | 23591 | if (entry.name != NULL) |
9291a0cd | 23592 | { |
4b76cda9 | 23593 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 23594 | if (insertpair.second) |
4b76cda9 | 23595 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 23596 | str_off = insertpair.first->second; |
4b76cda9 | 23597 | vec_off = entry.index_offset; |
9291a0cd TT |
23598 | } |
23599 | else | |
23600 | { | |
23601 | /* While 0 is a valid constant pool index, it is not valid | |
23602 | to have 0 for both offsets. */ | |
23603 | str_off = 0; | |
23604 | vec_off = 0; | |
23605 | } | |
23606 | ||
bc8f2430 JK |
23607 | output.append_data (MAYBE_SWAP (str_off)); |
23608 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 23609 | } |
9291a0cd TT |
23610 | } |
23611 | ||
bc8f2430 | 23612 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
23613 | |
23614 | /* Helper struct for building the address table. */ | |
23615 | struct addrmap_index_data | |
23616 | { | |
bc8f2430 JK |
23617 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
23618 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
23619 | {} | |
23620 | ||
0a5429f6 | 23621 | struct objfile *objfile; |
bc8f2430 JK |
23622 | data_buf &addr_vec; |
23623 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
23624 | |
23625 | /* Non-zero if the previous_* fields are valid. | |
23626 | We can't write an entry until we see the next entry (since it is only then | |
23627 | that we know the end of the entry). */ | |
23628 | int previous_valid; | |
23629 | /* Index of the CU in the table of all CUs in the index file. */ | |
23630 | unsigned int previous_cu_index; | |
0963b4bd | 23631 | /* Start address of the CU. */ |
0a5429f6 DE |
23632 | CORE_ADDR previous_cu_start; |
23633 | }; | |
23634 | ||
bc8f2430 | 23635 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 23636 | |
9291a0cd | 23637 | static void |
bc8f2430 | 23638 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 23639 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 23640 | { |
9291a0cd TT |
23641 | CORE_ADDR baseaddr; |
23642 | ||
23643 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23644 | ||
c2f134ac PA |
23645 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23646 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 23647 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
23648 | } |
23649 | ||
23650 | /* Worker function for traversing an addrmap to build the address table. */ | |
23651 | ||
23652 | static int | |
23653 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23654 | { | |
9a3c8263 SM |
23655 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23656 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23657 | |
23658 | if (data->previous_valid) | |
bc8f2430 | 23659 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
23660 | data->previous_cu_start, start_addr, |
23661 | data->previous_cu_index); | |
23662 | ||
23663 | data->previous_cu_start = start_addr; | |
23664 | if (pst != NULL) | |
23665 | { | |
bc8f2430 JK |
23666 | const auto it = data->cu_index_htab.find (pst); |
23667 | gdb_assert (it != data->cu_index_htab.cend ()); | |
23668 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
23669 | data->previous_valid = 1; |
23670 | } | |
23671 | else | |
bc8f2430 | 23672 | data->previous_valid = 0; |
0a5429f6 DE |
23673 | |
23674 | return 0; | |
23675 | } | |
23676 | ||
bc8f2430 | 23677 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
23678 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
23679 | in the index file. */ | |
23680 | ||
23681 | static void | |
bc8f2430 JK |
23682 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
23683 | psym_index_map &cu_index_htab) | |
0a5429f6 | 23684 | { |
bc8f2430 | 23685 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
23686 | |
23687 | /* When writing the address table, we have to cope with the fact that | |
23688 | the addrmap iterator only provides the start of a region; we have to | |
23689 | wait until the next invocation to get the start of the next region. */ | |
23690 | ||
23691 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
23692 | addrmap_index_data.previous_valid = 0; |
23693 | ||
23694 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23695 | &addrmap_index_data); | |
23696 | ||
23697 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23698 | is valid, but we should still handle it. | |
23699 | The end address is recorded as the start of the next region, but that | |
23700 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23701 | anyway. */ | |
23702 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 23703 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
23704 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
23705 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23706 | } |
23707 | ||
156942c7 DE |
23708 | /* Return the symbol kind of PSYM. */ |
23709 | ||
23710 | static gdb_index_symbol_kind | |
23711 | symbol_kind (struct partial_symbol *psym) | |
23712 | { | |
23713 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23714 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23715 | ||
23716 | switch (domain) | |
23717 | { | |
23718 | case VAR_DOMAIN: | |
23719 | switch (aclass) | |
23720 | { | |
23721 | case LOC_BLOCK: | |
23722 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23723 | case LOC_TYPEDEF: | |
23724 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23725 | case LOC_COMPUTED: | |
23726 | case LOC_CONST_BYTES: | |
23727 | case LOC_OPTIMIZED_OUT: | |
23728 | case LOC_STATIC: | |
23729 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23730 | case LOC_CONST: | |
23731 | /* Note: It's currently impossible to recognize psyms as enum values | |
23732 | short of reading the type info. For now punt. */ | |
23733 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23734 | default: | |
23735 | /* There are other LOC_FOO values that one might want to classify | |
23736 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23737 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23738 | } | |
23739 | case STRUCT_DOMAIN: | |
23740 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23741 | default: | |
23742 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23743 | } | |
23744 | } | |
23745 | ||
9291a0cd | 23746 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23747 | |
9291a0cd TT |
23748 | static void |
23749 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 23750 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
23751 | struct partial_symbol **psymp, |
23752 | int count, | |
987d643c TT |
23753 | offset_type cu_index, |
23754 | int is_static) | |
9291a0cd TT |
23755 | { |
23756 | for (; count-- > 0; ++psymp) | |
23757 | { | |
156942c7 | 23758 | struct partial_symbol *psym = *psymp; |
987d643c | 23759 | |
156942c7 | 23760 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23761 | error (_("Ada is not currently supported by the index")); |
987d643c | 23762 | |
987d643c | 23763 | /* Only add a given psymbol once. */ |
bc8f2430 | 23764 | if (psyms_seen.insert (psym).second) |
987d643c | 23765 | { |
156942c7 DE |
23766 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23767 | ||
156942c7 DE |
23768 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
23769 | is_static, kind, cu_index); | |
987d643c | 23770 | } |
9291a0cd TT |
23771 | } |
23772 | } | |
23773 | ||
1fd400ff TT |
23774 | /* A helper struct used when iterating over debug_types. */ |
23775 | struct signatured_type_index_data | |
23776 | { | |
bc8f2430 JK |
23777 | signatured_type_index_data (data_buf &types_list_, |
23778 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
23779 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
23780 | {} | |
23781 | ||
1fd400ff TT |
23782 | struct objfile *objfile; |
23783 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
23784 | data_buf &types_list; |
23785 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
23786 | int cu_index; |
23787 | }; | |
23788 | ||
23789 | /* A helper function that writes a single signatured_type to an | |
23790 | obstack. */ | |
b89be57b | 23791 | |
1fd400ff TT |
23792 | static int |
23793 | write_one_signatured_type (void **slot, void *d) | |
23794 | { | |
9a3c8263 SM |
23795 | struct signatured_type_index_data *info |
23796 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23797 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23798 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23799 | |
23800 | write_psymbols (info->symtab, | |
987d643c | 23801 | info->psyms_seen, |
3e43a32a MS |
23802 | info->objfile->global_psymbols.list |
23803 | + psymtab->globals_offset, | |
987d643c TT |
23804 | psymtab->n_global_syms, info->cu_index, |
23805 | 0); | |
1fd400ff | 23806 | write_psymbols (info->symtab, |
987d643c | 23807 | info->psyms_seen, |
3e43a32a MS |
23808 | info->objfile->static_psymbols.list |
23809 | + psymtab->statics_offset, | |
987d643c TT |
23810 | psymtab->n_static_syms, info->cu_index, |
23811 | 1); | |
1fd400ff | 23812 | |
c2f134ac PA |
23813 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23814 | to_underlying (entry->per_cu.sect_off)); | |
23815 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
23816 | to_underlying (entry->type_offset_in_tu)); | |
23817 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
23818 | |
23819 | ++info->cu_index; | |
23820 | ||
23821 | return 1; | |
23822 | } | |
23823 | ||
e8f8bcb3 PA |
23824 | /* Recurse into all "included" dependencies and count their symbols as |
23825 | if they appeared in this psymtab. */ | |
23826 | ||
23827 | static void | |
23828 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
23829 | size_t &psyms_seen) | |
23830 | { | |
23831 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
23832 | if (psymtab->dependencies[i]->user != NULL) | |
23833 | recursively_count_psymbols (psymtab->dependencies[i], | |
23834 | psyms_seen); | |
23835 | ||
23836 | psyms_seen += psymtab->n_global_syms; | |
23837 | psyms_seen += psymtab->n_static_syms; | |
23838 | } | |
23839 | ||
95554aad TT |
23840 | /* Recurse into all "included" dependencies and write their symbols as |
23841 | if they appeared in this psymtab. */ | |
23842 | ||
23843 | static void | |
23844 | recursively_write_psymbols (struct objfile *objfile, | |
23845 | struct partial_symtab *psymtab, | |
23846 | struct mapped_symtab *symtab, | |
bc8f2430 | 23847 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
23848 | offset_type cu_index) |
23849 | { | |
23850 | int i; | |
23851 | ||
23852 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23853 | if (psymtab->dependencies[i]->user != NULL) | |
23854 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23855 | symtab, psyms_seen, cu_index); | |
23856 | ||
23857 | write_psymbols (symtab, | |
23858 | psyms_seen, | |
23859 | objfile->global_psymbols.list + psymtab->globals_offset, | |
23860 | psymtab->n_global_syms, cu_index, | |
23861 | 0); | |
23862 | write_psymbols (symtab, | |
23863 | psyms_seen, | |
23864 | objfile->static_psymbols.list + psymtab->statics_offset, | |
23865 | psymtab->n_static_syms, cu_index, | |
23866 | 1); | |
23867 | } | |
23868 | ||
9291a0cd | 23869 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23870 | |
9291a0cd TT |
23871 | static void |
23872 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23873 | { | |
9291a0cd TT |
23874 | if (dwarf2_per_objfile->using_index) |
23875 | error (_("Cannot use an index to create the index")); | |
23876 | ||
8b70b953 TT |
23877 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23878 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23879 | ||
260b681b DE |
23880 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23881 | return; | |
23882 | ||
bc8f2430 | 23883 | struct stat st; |
4262abfb JK |
23884 | if (stat (objfile_name (objfile), &st) < 0) |
23885 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23886 | |
bc8f2430 JK |
23887 | std::string filename (std::string (dir) + SLASH_STRING |
23888 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 23889 | |
d419f42d | 23890 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 23891 | if (!out_file) |
bc8f2430 | 23892 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 23893 | |
16b7a719 PA |
23894 | /* Order matters here; we want FILE to be closed before FILENAME is |
23895 | unlinked, because on MS-Windows one cannot delete a file that is | |
23896 | still open. (Don't call anything here that might throw until | |
23897 | file_closer is created.) */ | |
bc8f2430 | 23898 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 23899 | gdb_file_up close_out_file (out_file); |
9291a0cd | 23900 | |
bc8f2430 JK |
23901 | mapped_symtab symtab; |
23902 | data_buf cu_list; | |
987d643c | 23903 | |
0a5429f6 DE |
23904 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23905 | (which is what addrmap records) to its index (which is what is recorded | |
23906 | in the index file). This will later be needed to write the address | |
23907 | table. */ | |
bc8f2430 JK |
23908 | psym_index_map cu_index_htab; |
23909 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23910 | |
23911 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23912 | work here. Also, the debug_types entries do not appear in |
23913 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
23914 | |
23915 | /* The psyms_seen set is potentially going to be largish (~40k | |
23916 | elements when indexing a -g3 build of GDB itself). Estimate the | |
23917 | number of elements in order to avoid too many rehashes, which | |
23918 | require rebuilding buckets and thus many trips to | |
23919 | malloc/free. */ | |
23920 | size_t psyms_count = 0; | |
23921 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
23922 | { | |
23923 | struct dwarf2_per_cu_data *per_cu | |
23924 | = dwarf2_per_objfile->all_comp_units[i]; | |
23925 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
23926 | ||
23927 | if (psymtab != NULL && psymtab->user == NULL) | |
23928 | recursively_count_psymbols (psymtab, psyms_count); | |
23929 | } | |
23930 | /* Generating an index for gdb itself shows a ratio of | |
23931 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
23932 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 23933 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 23934 | { |
3e43a32a MS |
23935 | struct dwarf2_per_cu_data *per_cu |
23936 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23937 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23938 | |
92fac807 JK |
23939 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23940 | It may be referenced from a local scope but in such case it does not | |
23941 | need to be present in .gdb_index. */ | |
23942 | if (psymtab == NULL) | |
23943 | continue; | |
23944 | ||
95554aad | 23945 | if (psymtab->user == NULL) |
bc8f2430 JK |
23946 | recursively_write_psymbols (objfile, psymtab, &symtab, |
23947 | psyms_seen, i); | |
9291a0cd | 23948 | |
bc8f2430 JK |
23949 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
23950 | gdb_assert (insertpair.second); | |
9291a0cd | 23951 | |
c2f134ac PA |
23952 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23953 | to_underlying (per_cu->sect_off)); | |
23954 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
23955 | } |
23956 | ||
0a5429f6 | 23957 | /* Dump the address map. */ |
bc8f2430 JK |
23958 | data_buf addr_vec; |
23959 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 23960 | |
1fd400ff | 23961 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 23962 | data_buf types_cu_list; |
1fd400ff TT |
23963 | if (dwarf2_per_objfile->signatured_types) |
23964 | { | |
bc8f2430 JK |
23965 | signatured_type_index_data sig_data (types_cu_list, |
23966 | psyms_seen); | |
1fd400ff TT |
23967 | |
23968 | sig_data.objfile = objfile; | |
bc8f2430 | 23969 | sig_data.symtab = &symtab; |
1fd400ff TT |
23970 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23971 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23972 | write_one_signatured_type, &sig_data); | |
23973 | } | |
23974 | ||
156942c7 DE |
23975 | /* Now that we've processed all symbols we can shrink their cu_indices |
23976 | lists. */ | |
bc8f2430 | 23977 | uniquify_cu_indices (&symtab); |
156942c7 | 23978 | |
bc8f2430 JK |
23979 | data_buf symtab_vec, constant_pool; |
23980 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 23981 | |
bc8f2430 JK |
23982 | data_buf contents; |
23983 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
23984 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
23985 | |
23986 | /* The version number. */ | |
bc8f2430 | 23987 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
23988 | |
23989 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
23990 | contents.append_data (MAYBE_SWAP (total_len)); |
23991 | total_len += cu_list.size (); | |
9291a0cd | 23992 | |
1fd400ff | 23993 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
23994 | contents.append_data (MAYBE_SWAP (total_len)); |
23995 | total_len += types_cu_list.size (); | |
1fd400ff | 23996 | |
9291a0cd | 23997 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
23998 | contents.append_data (MAYBE_SWAP (total_len)); |
23999 | total_len += addr_vec.size (); | |
9291a0cd TT |
24000 | |
24001 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24002 | contents.append_data (MAYBE_SWAP (total_len)); |
24003 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24004 | |
24005 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24006 | contents.append_data (MAYBE_SWAP (total_len)); |
24007 | total_len += constant_pool.size (); | |
9291a0cd | 24008 | |
bc8f2430 | 24009 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24010 | |
bc8f2430 JK |
24011 | contents.file_write (out_file); |
24012 | cu_list.file_write (out_file); | |
24013 | types_cu_list.file_write (out_file); | |
24014 | addr_vec.file_write (out_file); | |
24015 | symtab_vec.file_write (out_file); | |
24016 | constant_pool.file_write (out_file); | |
9291a0cd | 24017 | |
bef155c3 TT |
24018 | /* We want to keep the file. */ |
24019 | unlink_file.keep (); | |
9291a0cd TT |
24020 | } |
24021 | ||
90476074 TT |
24022 | /* Implementation of the `save gdb-index' command. |
24023 | ||
24024 | Note that the file format used by this command is documented in the | |
24025 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24026 | |
9291a0cd TT |
24027 | static void |
24028 | save_gdb_index_command (char *arg, int from_tty) | |
24029 | { | |
24030 | struct objfile *objfile; | |
24031 | ||
24032 | if (!arg || !*arg) | |
96d19272 | 24033 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24034 | |
24035 | ALL_OBJFILES (objfile) | |
24036 | { | |
24037 | struct stat st; | |
24038 | ||
24039 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24040 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24041 | continue; |
24042 | ||
9a3c8263 SM |
24043 | dwarf2_per_objfile |
24044 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24045 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24046 | if (dwarf2_per_objfile) |
24047 | { | |
9291a0cd | 24048 | |
492d29ea | 24049 | TRY |
9291a0cd TT |
24050 | { |
24051 | write_psymtabs_to_index (objfile, arg); | |
24052 | } | |
492d29ea PA |
24053 | CATCH (except, RETURN_MASK_ERROR) |
24054 | { | |
24055 | exception_fprintf (gdb_stderr, except, | |
24056 | _("Error while writing index for `%s': "), | |
24057 | objfile_name (objfile)); | |
24058 | } | |
24059 | END_CATCH | |
9291a0cd TT |
24060 | } |
24061 | } | |
dce234bc PP |
24062 | } |
24063 | ||
9291a0cd TT |
24064 | \f |
24065 | ||
b4f54984 | 24066 | int dwarf_always_disassemble; |
9eae7c52 TT |
24067 | |
24068 | static void | |
b4f54984 DE |
24069 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24070 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24071 | { |
3e43a32a MS |
24072 | fprintf_filtered (file, |
24073 | _("Whether to always disassemble " | |
24074 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24075 | value); |
24076 | } | |
24077 | ||
900e11f9 JK |
24078 | static void |
24079 | show_check_physname (struct ui_file *file, int from_tty, | |
24080 | struct cmd_list_element *c, const char *value) | |
24081 | { | |
24082 | fprintf_filtered (file, | |
24083 | _("Whether to check \"physname\" is %s.\n"), | |
24084 | value); | |
24085 | } | |
24086 | ||
6502dd73 DJ |
24087 | void |
24088 | _initialize_dwarf2_read (void) | |
24089 | { | |
96d19272 JK |
24090 | struct cmd_list_element *c; |
24091 | ||
dce234bc | 24092 | dwarf2_objfile_data_key |
c1bd65d0 | 24093 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24094 | |
b4f54984 DE |
24095 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24096 | Set DWARF specific variables.\n\ | |
24097 | Configure DWARF variables such as the cache size"), | |
24098 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24099 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24100 | ||
b4f54984 DE |
24101 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24102 | Show DWARF specific variables\n\ | |
24103 | Show DWARF variables such as the cache size"), | |
24104 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24105 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24106 | ||
24107 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24108 | &dwarf_max_cache_age, _("\ |
24109 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24110 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24111 | A higher limit means that cached compilation units will be stored\n\ |
24112 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24113 | caching, which can slow down startup."), | |
2c5b56ce | 24114 | NULL, |
b4f54984 DE |
24115 | show_dwarf_max_cache_age, |
24116 | &set_dwarf_cmdlist, | |
24117 | &show_dwarf_cmdlist); | |
d97bc12b | 24118 | |
9eae7c52 | 24119 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24120 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24121 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24122 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24123 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24124 | syntax. When disabled, expressions will be printed in a more\n\ | |
24125 | conversational style, when possible."), | |
24126 | NULL, | |
b4f54984 DE |
24127 | show_dwarf_always_disassemble, |
24128 | &set_dwarf_cmdlist, | |
24129 | &show_dwarf_cmdlist); | |
24130 | ||
24131 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24132 | Set debugging of the DWARF reader."), _("\ | |
24133 | Show debugging of the DWARF reader."), _("\ | |
24134 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24135 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24136 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24137 | NULL, |
24138 | NULL, | |
24139 | &setdebuglist, &showdebuglist); | |
24140 | ||
b4f54984 DE |
24141 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24142 | Set debugging of the DWARF DIE reader."), _("\ | |
24143 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24144 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24145 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24146 | NULL, |
24147 | NULL, | |
24148 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24149 | |
27e0867f DE |
24150 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24151 | Set debugging of the dwarf line reader."), _("\ | |
24152 | Show debugging of the dwarf line reader."), _("\ | |
24153 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24154 | A value of 1 (one) provides basic information.\n\ | |
24155 | A value greater than 1 provides more verbose information."), | |
24156 | NULL, | |
24157 | NULL, | |
24158 | &setdebuglist, &showdebuglist); | |
24159 | ||
900e11f9 JK |
24160 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24161 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24162 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24163 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24164 | the demangler."), | |
24165 | NULL, show_check_physname, | |
24166 | &setdebuglist, &showdebuglist); | |
24167 | ||
e615022a DE |
24168 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24169 | no_class, &use_deprecated_index_sections, _("\ | |
24170 | Set whether to use deprecated gdb_index sections."), _("\ | |
24171 | Show whether to use deprecated gdb_index sections."), _("\ | |
24172 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24173 | Normally they are ignored either because of a missing feature or\n\ | |
24174 | performance issue.\n\ | |
24175 | Warning: This option must be enabled before gdb reads the file."), | |
24176 | NULL, | |
24177 | NULL, | |
24178 | &setlist, &showlist); | |
24179 | ||
96d19272 | 24180 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 24181 | _("\ |
fc1a9d6e | 24182 | Save a gdb-index file.\n\ |
11570e71 | 24183 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
24184 | &save_cmdlist); |
24185 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
24186 | |
24187 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24188 | &dwarf2_locexpr_funcs); | |
24189 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24190 | &dwarf2_loclist_funcs); | |
24191 | ||
24192 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24193 | &dwarf2_block_frame_base_locexpr_funcs); | |
24194 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24195 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 24196 | } |