Commit | Line | Data |
---|---|---|
c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
e2882c85 | 3 | Copyright (C) 1994-2018 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 | 31 | #include "defs.h" |
cd4fb1b2 SM |
32 | #include "dwarf2read.h" |
33 | #include "dwarf-index-common.h" | |
c906108c | 34 | #include "bfd.h" |
80626a55 | 35 | #include "elf-bfd.h" |
c906108c SS |
36 | #include "symtab.h" |
37 | #include "gdbtypes.h" | |
c906108c | 38 | #include "objfiles.h" |
fa8f86ff | 39 | #include "dwarf2.h" |
804d2729 | 40 | #include "buildsym.h" |
c906108c | 41 | #include "demangle.h" |
50f182aa | 42 | #include "gdb-demangle.h" |
c906108c | 43 | #include "expression.h" |
d5166ae1 | 44 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 45 | #include "macrotab.h" |
c906108c SS |
46 | #include "language.h" |
47 | #include "complaints.h" | |
357e46e7 | 48 | #include "bcache.h" |
4c2df51b DJ |
49 | #include "dwarf2expr.h" |
50 | #include "dwarf2loc.h" | |
9219021c | 51 | #include "cp-support.h" |
72bf9492 | 52 | #include "hashtab.h" |
ae038cb0 DJ |
53 | #include "command.h" |
54 | #include "gdbcmd.h" | |
edb3359d | 55 | #include "block.h" |
ff013f42 | 56 | #include "addrmap.h" |
94af9270 | 57 | #include "typeprint.h" |
ccefe4c4 | 58 | #include "psympriv.h" |
53ce3c39 | 59 | #include <sys/stat.h> |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
05cba821 | 70 | #include "source.h" |
614c279d | 71 | #include "filestuff.h" |
dc294be5 | 72 | #include "build-id.h" |
22cee43f | 73 | #include "namespace.h" |
bef155c3 | 74 | #include "common/gdb_unlinker.h" |
14bc53a8 | 75 | #include "common/function-view.h" |
ecfb656c PA |
76 | #include "common/gdb_optional.h" |
77 | #include "common/underlying.h" | |
d5722aa2 | 78 | #include "common/byte-vector.h" |
927aa2e7 | 79 | #include "common/hash_enum.h" |
bbf2f4df | 80 | #include "filename-seen-cache.h" |
b32b108a | 81 | #include "producer.h" |
c906108c | 82 | #include <fcntl.h> |
c906108c | 83 | #include <sys/types.h> |
325fac50 | 84 | #include <algorithm> |
bc8f2430 JK |
85 | #include <unordered_set> |
86 | #include <unordered_map> | |
c62446b1 | 87 | #include "selftest.h" |
437afbb8 JK |
88 | #include <cmath> |
89 | #include <set> | |
90 | #include <forward_list> | |
c9317f21 | 91 | #include "rust-lang.h" |
b4987c95 | 92 | #include "common/pathstuff.h" |
437afbb8 | 93 | |
73be47f5 DE |
94 | /* When == 1, print basic high level tracing messages. |
95 | When > 1, be more verbose. | |
b4f54984 DE |
96 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
97 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 98 | |
d97bc12b | 99 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 100 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 101 | |
27e0867f DE |
102 | /* When non-zero, dump line number entries as they are read in. */ |
103 | static unsigned int dwarf_line_debug = 0; | |
104 | ||
900e11f9 JK |
105 | /* When non-zero, cross-check physname against demangler. */ |
106 | static int check_physname = 0; | |
107 | ||
481860b3 | 108 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 109 | static int use_deprecated_index_sections = 0; |
481860b3 | 110 | |
6502dd73 DJ |
111 | static const struct objfile_data *dwarf2_objfile_data_key; |
112 | ||
f1e6e072 TT |
113 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
114 | ||
115 | static int dwarf2_locexpr_index; | |
116 | static int dwarf2_loclist_index; | |
117 | static int dwarf2_locexpr_block_index; | |
118 | static int dwarf2_loclist_block_index; | |
119 | ||
3f563c84 PA |
120 | /* An index into a (C++) symbol name component in a symbol name as |
121 | recorded in the mapped_index's symbol table. For each C++ symbol | |
122 | in the symbol table, we record one entry for the start of each | |
123 | component in the symbol in a table of name components, and then | |
124 | sort the table, in order to be able to binary search symbol names, | |
125 | ignoring leading namespaces, both completion and regular look up. | |
126 | For example, for symbol "A::B::C", we'll have an entry that points | |
127 | to "A::B::C", another that points to "B::C", and another for "C". | |
128 | Note that function symbols in GDB index have no parameter | |
129 | information, just the function/method names. You can convert a | |
130 | name_component to a "const char *" using the | |
131 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
132 | ||
133 | struct name_component | |
134 | { | |
135 | /* Offset in the symbol name where the component starts. Stored as | |
136 | a (32-bit) offset instead of a pointer to save memory and improve | |
137 | locality on 64-bit architectures. */ | |
138 | offset_type name_offset; | |
139 | ||
140 | /* The symbol's index in the symbol and constant pool tables of a | |
141 | mapped_index. */ | |
142 | offset_type idx; | |
143 | }; | |
144 | ||
44ed8f3e PA |
145 | /* Base class containing bits shared by both .gdb_index and |
146 | .debug_name indexes. */ | |
147 | ||
148 | struct mapped_index_base | |
149 | { | |
22ca247e TT |
150 | mapped_index_base () = default; |
151 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
152 | ||
44ed8f3e PA |
153 | /* The name_component table (a sorted vector). See name_component's |
154 | description above. */ | |
155 | std::vector<name_component> name_components; | |
156 | ||
157 | /* How NAME_COMPONENTS is sorted. */ | |
158 | enum case_sensitivity name_components_casing; | |
159 | ||
160 | /* Return the number of names in the symbol table. */ | |
161 | virtual size_t symbol_name_count () const = 0; | |
162 | ||
163 | /* Get the name of the symbol at IDX in the symbol table. */ | |
164 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
165 | ||
166 | /* Return whether the name at IDX in the symbol table should be | |
167 | ignored. */ | |
168 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
169 | { | |
170 | return false; | |
171 | } | |
172 | ||
173 | /* Build the symbol name component sorted vector, if we haven't | |
174 | yet. */ | |
175 | void build_name_components (); | |
176 | ||
177 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
178 | possible matches for LN_NO_PARAMS in the name component | |
179 | vector. */ | |
180 | std::pair<std::vector<name_component>::const_iterator, | |
181 | std::vector<name_component>::const_iterator> | |
182 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
183 | ||
184 | /* Prevent deleting/destroying via a base class pointer. */ | |
185 | protected: | |
186 | ~mapped_index_base() = default; | |
187 | }; | |
188 | ||
9291a0cd TT |
189 | /* A description of the mapped index. The file format is described in |
190 | a comment by the code that writes the index. */ | |
fc898b42 | 191 | struct mapped_index final : public mapped_index_base |
9291a0cd | 192 | { |
f00a2de2 PA |
193 | /* A slot/bucket in the symbol table hash. */ |
194 | struct symbol_table_slot | |
195 | { | |
196 | const offset_type name; | |
197 | const offset_type vec; | |
198 | }; | |
199 | ||
559a7a62 | 200 | /* Index data format version. */ |
3063847f | 201 | int version = 0; |
559a7a62 | 202 | |
f00a2de2 PA |
203 | /* The address table data. */ |
204 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 205 | |
3876f04e | 206 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 207 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 208 | |
9291a0cd | 209 | /* A pointer to the constant pool. */ |
3063847f | 210 | const char *constant_pool = nullptr; |
3f563c84 | 211 | |
44ed8f3e PA |
212 | bool symbol_name_slot_invalid (offset_type idx) const override |
213 | { | |
214 | const auto &bucket = this->symbol_table[idx]; | |
215 | return bucket.name == 0 && bucket.vec; | |
216 | } | |
5c58de74 | 217 | |
3f563c84 PA |
218 | /* Convenience method to get at the name of the symbol at IDX in the |
219 | symbol table. */ | |
44ed8f3e | 220 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 221 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 222 | |
44ed8f3e PA |
223 | size_t symbol_name_count () const override |
224 | { return this->symbol_table.size (); } | |
9291a0cd TT |
225 | }; |
226 | ||
927aa2e7 JK |
227 | /* A description of the mapped .debug_names. |
228 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 229 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 230 | { |
ed2dc618 SM |
231 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
232 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
233 | {} | |
234 | ||
235 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
236 | bfd_endian dwarf5_byte_order; |
237 | bool dwarf5_is_dwarf64; | |
238 | bool augmentation_is_gdb; | |
239 | uint8_t offset_size; | |
240 | uint32_t cu_count = 0; | |
241 | uint32_t tu_count, bucket_count, name_count; | |
242 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
243 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
244 | const gdb_byte *name_table_string_offs_reordered; | |
245 | const gdb_byte *name_table_entry_offs_reordered; | |
246 | const gdb_byte *entry_pool; | |
247 | ||
248 | struct index_val | |
249 | { | |
250 | ULONGEST dwarf_tag; | |
251 | struct attr | |
252 | { | |
253 | /* Attribute name DW_IDX_*. */ | |
254 | ULONGEST dw_idx; | |
255 | ||
256 | /* Attribute form DW_FORM_*. */ | |
257 | ULONGEST form; | |
258 | ||
259 | /* Value if FORM is DW_FORM_implicit_const. */ | |
260 | LONGEST implicit_const; | |
261 | }; | |
262 | std::vector<attr> attr_vec; | |
263 | }; | |
264 | ||
265 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
266 | ||
267 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
268 | |
269 | /* Implementation of the mapped_index_base virtual interface, for | |
270 | the name_components cache. */ | |
271 | ||
272 | const char *symbol_name_at (offset_type idx) const override | |
273 | { return namei_to_name (idx); } | |
274 | ||
275 | size_t symbol_name_count () const override | |
276 | { return this->name_count; } | |
927aa2e7 JK |
277 | }; |
278 | ||
cd4fb1b2 | 279 | /* See dwarf2read.h. */ |
ed2dc618 | 280 | |
cd4fb1b2 | 281 | dwarf2_per_objfile * |
ed2dc618 SM |
282 | get_dwarf2_per_objfile (struct objfile *objfile) |
283 | { | |
284 | return ((struct dwarf2_per_objfile *) | |
285 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
286 | } | |
287 | ||
288 | /* Set the dwarf2_per_objfile associated to OBJFILE. */ | |
289 | ||
290 | void | |
291 | set_dwarf2_per_objfile (struct objfile *objfile, | |
292 | struct dwarf2_per_objfile *dwarf2_per_objfile) | |
293 | { | |
294 | gdb_assert (get_dwarf2_per_objfile (objfile) == NULL); | |
295 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
296 | } | |
c906108c | 297 | |
251d32d9 | 298 | /* Default names of the debugging sections. */ |
c906108c | 299 | |
233a11ab CS |
300 | /* Note that if the debugging section has been compressed, it might |
301 | have a name like .zdebug_info. */ | |
302 | ||
9cdd5dbd DE |
303 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
304 | { | |
251d32d9 TG |
305 | { ".debug_info", ".zdebug_info" }, |
306 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
307 | { ".debug_line", ".zdebug_line" }, | |
308 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 309 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 310 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 311 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 312 | { ".debug_str", ".zdebug_str" }, |
43988095 | 313 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 314 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 315 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 316 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 317 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
318 | { ".debug_frame", ".zdebug_frame" }, |
319 | { ".eh_frame", NULL }, | |
24d3216f | 320 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
321 | { ".debug_names", ".zdebug_names" }, |
322 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 323 | 23 |
251d32d9 | 324 | }; |
c906108c | 325 | |
80626a55 | 326 | /* List of DWO/DWP sections. */ |
3019eac3 | 327 | |
80626a55 | 328 | static const struct dwop_section_names |
3019eac3 DE |
329 | { |
330 | struct dwarf2_section_names abbrev_dwo; | |
331 | struct dwarf2_section_names info_dwo; | |
332 | struct dwarf2_section_names line_dwo; | |
333 | struct dwarf2_section_names loc_dwo; | |
43988095 | 334 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
335 | struct dwarf2_section_names macinfo_dwo; |
336 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
337 | struct dwarf2_section_names str_dwo; |
338 | struct dwarf2_section_names str_offsets_dwo; | |
339 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
340 | struct dwarf2_section_names cu_index; |
341 | struct dwarf2_section_names tu_index; | |
3019eac3 | 342 | } |
80626a55 | 343 | dwop_section_names = |
3019eac3 DE |
344 | { |
345 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
346 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
347 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
348 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 349 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
350 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
351 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
352 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
353 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
354 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
355 | { ".debug_cu_index", ".zdebug_cu_index" }, |
356 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
357 | }; |
358 | ||
c906108c SS |
359 | /* local data types */ |
360 | ||
107d2387 AC |
361 | /* The data in a compilation unit header, after target2host |
362 | translation, looks like this. */ | |
c906108c | 363 | struct comp_unit_head |
a738430d | 364 | { |
c764a876 | 365 | unsigned int length; |
a738430d | 366 | short version; |
a738430d MK |
367 | unsigned char addr_size; |
368 | unsigned char signed_addr_p; | |
9c541725 | 369 | sect_offset abbrev_sect_off; |
57349743 | 370 | |
a738430d MK |
371 | /* Size of file offsets; either 4 or 8. */ |
372 | unsigned int offset_size; | |
57349743 | 373 | |
a738430d MK |
374 | /* Size of the length field; either 4 or 12. */ |
375 | unsigned int initial_length_size; | |
57349743 | 376 | |
43988095 JK |
377 | enum dwarf_unit_type unit_type; |
378 | ||
a738430d MK |
379 | /* Offset to the first byte of this compilation unit header in the |
380 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 381 | sect_offset sect_off; |
57349743 | 382 | |
d00adf39 DE |
383 | /* Offset to first die in this cu from the start of the cu. |
384 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 385 | cu_offset first_die_cu_offset; |
43988095 JK |
386 | |
387 | /* 64-bit signature of this type unit - it is valid only for | |
388 | UNIT_TYPE DW_UT_type. */ | |
389 | ULONGEST signature; | |
390 | ||
391 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 392 | cu_offset type_cu_offset_in_tu; |
a738430d | 393 | }; |
c906108c | 394 | |
3da10d80 KS |
395 | /* Type used for delaying computation of method physnames. |
396 | See comments for compute_delayed_physnames. */ | |
397 | struct delayed_method_info | |
398 | { | |
399 | /* The type to which the method is attached, i.e., its parent class. */ | |
400 | struct type *type; | |
401 | ||
402 | /* The index of the method in the type's function fieldlists. */ | |
403 | int fnfield_index; | |
404 | ||
405 | /* The index of the method in the fieldlist. */ | |
406 | int index; | |
407 | ||
408 | /* The name of the DIE. */ | |
409 | const char *name; | |
410 | ||
411 | /* The DIE associated with this method. */ | |
412 | struct die_info *die; | |
413 | }; | |
414 | ||
e7c27a73 DJ |
415 | /* Internal state when decoding a particular compilation unit. */ |
416 | struct dwarf2_cu | |
417 | { | |
fcd3b13d SM |
418 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
419 | ~dwarf2_cu (); | |
420 | ||
421 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
422 | ||
d00adf39 | 423 | /* The header of the compilation unit. */ |
fcd3b13d | 424 | struct comp_unit_head header {}; |
e142c38c | 425 | |
d00adf39 | 426 | /* Base address of this compilation unit. */ |
fcd3b13d | 427 | CORE_ADDR base_address = 0; |
d00adf39 DE |
428 | |
429 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 430 | int base_known = 0; |
d00adf39 | 431 | |
e142c38c | 432 | /* The language we are debugging. */ |
fcd3b13d SM |
433 | enum language language = language_unknown; |
434 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 435 | |
fcd3b13d | 436 | const char *producer = nullptr; |
b0f35d58 | 437 | |
804d2729 TT |
438 | /* The symtab builder for this CU. This is only non-NULL when full |
439 | symbols are being read. */ | |
440 | std::unique_ptr<buildsym_compunit> builder; | |
441 | ||
e142c38c DJ |
442 | /* The generic symbol table building routines have separate lists for |
443 | file scope symbols and all all other scopes (local scopes). So | |
444 | we need to select the right one to pass to add_symbol_to_list(). | |
445 | We do it by keeping a pointer to the correct list in list_in_scope. | |
446 | ||
447 | FIXME: The original dwarf code just treated the file scope as the | |
448 | first local scope, and all other local scopes as nested local | |
449 | scopes, and worked fine. Check to see if we really need to | |
450 | distinguish these in buildsym.c. */ | |
fcd3b13d | 451 | struct pending **list_in_scope = nullptr; |
e142c38c | 452 | |
b64f50a1 JK |
453 | /* Hash table holding all the loaded partial DIEs |
454 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 455 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
456 | |
457 | /* Storage for things with the same lifetime as this read-in compilation | |
458 | unit, including partial DIEs. */ | |
fcd3b13d | 459 | auto_obstack comp_unit_obstack; |
72bf9492 | 460 | |
ae038cb0 DJ |
461 | /* When multiple dwarf2_cu structures are living in memory, this field |
462 | chains them all together, so that they can be released efficiently. | |
463 | We will probably also want a generation counter so that most-recently-used | |
464 | compilation units are cached... */ | |
fcd3b13d | 465 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 466 | |
69d751e3 | 467 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
468 | struct dwarf2_per_cu_data *per_cu; |
469 | ||
470 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 471 | int last_used = 0; |
ae038cb0 | 472 | |
b64f50a1 JK |
473 | /* A hash table of DIE cu_offset for following references with |
474 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 475 | htab_t die_hash = nullptr; |
10b3939b DJ |
476 | |
477 | /* Full DIEs if read in. */ | |
fcd3b13d | 478 | struct die_info *dies = nullptr; |
10b3939b DJ |
479 | |
480 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
481 | units referenced by this one. Only set during full symbol processing; | |
482 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 483 | htab_t dependencies = nullptr; |
10b3939b | 484 | |
cb1df416 | 485 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 486 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
487 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
488 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
489 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
490 | to the line header as long as this DIE is being processed. See | |
491 | process_die_scope. */ | |
fcd3b13d | 492 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 493 | |
3da10d80 KS |
494 | /* A list of methods which need to have physnames computed |
495 | after all type information has been read. */ | |
c89b44cd | 496 | std::vector<delayed_method_info> method_list; |
3da10d80 | 497 | |
96408a79 | 498 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 499 | htab_t call_site_htab = nullptr; |
96408a79 | 500 | |
034e5797 DE |
501 | /* Non-NULL if this CU came from a DWO file. |
502 | There is an invariant here that is important to remember: | |
503 | Except for attributes copied from the top level DIE in the "main" | |
504 | (or "stub") file in preparation for reading the DWO file | |
505 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
506 | Either there isn't a DWO file (in which case this is NULL and the point | |
507 | is moot), or there is and either we're not going to read it (in which | |
508 | case this is NULL) or there is and we are reading it (in which case this | |
509 | is non-NULL). */ | |
fcd3b13d | 510 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 DE |
511 | |
512 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
513 | (zero is a valid value though). | |
1dbab08b | 514 | Note this value comes from the Fission stub CU/TU's DIE. */ |
fcd3b13d | 515 | ULONGEST addr_base = 0; |
3019eac3 | 516 | |
2e3cf129 DE |
517 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
518 | (zero is a valid value though). | |
1dbab08b | 519 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 520 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
521 | be used without needing to know whether DWO files are in use or not. |
522 | N.B. This does not apply to DW_AT_ranges appearing in | |
523 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
524 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
525 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
526 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
fcd3b13d | 527 | ULONGEST ranges_base = 0; |
2e3cf129 | 528 | |
c9317f21 TT |
529 | /* When reading debug info generated by older versions of rustc, we |
530 | have to rewrite some union types to be struct types with a | |
531 | variant part. This rewriting must be done after the CU is fully | |
532 | read in, because otherwise at the point of rewriting some struct | |
533 | type might not have been fully processed. So, we keep a list of | |
534 | all such types here and process them after expansion. */ | |
535 | std::vector<struct type *> rust_unions; | |
536 | ||
ae038cb0 DJ |
537 | /* Mark used when releasing cached dies. */ |
538 | unsigned int mark : 1; | |
539 | ||
8be455d7 JK |
540 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
541 | This test is imperfect as there may exist optimized debug code not using | |
542 | any location list and still facing inlining issues if handled as | |
543 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 544 | unsigned int has_loclist : 1; |
ba919b58 | 545 | |
1b80a9fa JK |
546 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
547 | if all the producer_is_* fields are valid. This information is cached | |
548 | because profiling CU expansion showed excessive time spent in | |
549 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
550 | unsigned int checked_producer : 1; |
551 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 552 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 553 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
554 | |
555 | /* When set, the file that we're processing is known to have | |
556 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
557 | this information, but later versions do. */ | |
558 | ||
559 | unsigned int processing_has_namespace_info : 1; | |
d590ff25 YQ |
560 | |
561 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
e7c27a73 DJ |
562 | }; |
563 | ||
094b34ac DE |
564 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
565 | This includes type_unit_group and quick_file_names. */ | |
566 | ||
567 | struct stmt_list_hash | |
568 | { | |
569 | /* The DWO unit this table is from or NULL if there is none. */ | |
570 | struct dwo_unit *dwo_unit; | |
571 | ||
572 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 573 | sect_offset line_sect_off; |
094b34ac DE |
574 | }; |
575 | ||
f4dc4d17 DE |
576 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
577 | an object of this type. */ | |
578 | ||
579 | struct type_unit_group | |
580 | { | |
0186c6a7 | 581 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
582 | To simplify things we create an artificial CU that "includes" all the |
583 | type units using this stmt_list so that the rest of the code still has | |
584 | a "per_cu" handle on the symtab. | |
585 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 586 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
587 | struct dwarf2_per_cu_data per_cu; |
588 | ||
0186c6a7 DE |
589 | /* The TUs that share this DW_AT_stmt_list entry. |
590 | This is added to while parsing type units to build partial symtabs, | |
591 | and is deleted afterwards and not used again. */ | |
592 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 593 | |
43f3e411 | 594 | /* The compunit symtab. |
094b34ac | 595 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
596 | so we create an essentially anonymous symtab as the compunit symtab. */ |
597 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 598 | |
094b34ac DE |
599 | /* The data used to construct the hash key. */ |
600 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
601 | |
602 | /* The number of symtabs from the line header. | |
603 | The value here must match line_header.num_file_names. */ | |
604 | unsigned int num_symtabs; | |
605 | ||
606 | /* The symbol tables for this TU (obtained from the files listed in | |
607 | DW_AT_stmt_list). | |
608 | WARNING: The order of entries here must match the order of entries | |
609 | in the line header. After the first TU using this type_unit_group, the | |
610 | line header for the subsequent TUs is recreated from this. This is done | |
611 | because we need to use the same symtabs for each TU using the same | |
612 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
613 | there's no guarantee the line header doesn't have duplicate entries. */ | |
614 | struct symtab **symtabs; | |
615 | }; | |
616 | ||
73869dc2 | 617 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
618 | |
619 | struct dwo_sections | |
620 | { | |
621 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
622 | struct dwarf2_section_info line; |
623 | struct dwarf2_section_info loc; | |
43988095 | 624 | struct dwarf2_section_info loclists; |
09262596 DE |
625 | struct dwarf2_section_info macinfo; |
626 | struct dwarf2_section_info macro; | |
3019eac3 DE |
627 | struct dwarf2_section_info str; |
628 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
629 | /* In the case of a virtual DWO file, these two are unused. */ |
630 | struct dwarf2_section_info info; | |
3019eac3 DE |
631 | VEC (dwarf2_section_info_def) *types; |
632 | }; | |
633 | ||
c88ee1f0 | 634 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
635 | |
636 | struct dwo_unit | |
637 | { | |
638 | /* Backlink to the containing struct dwo_file. */ | |
639 | struct dwo_file *dwo_file; | |
640 | ||
641 | /* The "id" that distinguishes this CU/TU. | |
642 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
643 | Since signatures came first, we stick with it for consistency. */ | |
644 | ULONGEST signature; | |
645 | ||
646 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 647 | struct dwarf2_section_info *section; |
3019eac3 | 648 | |
9c541725 PA |
649 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
650 | sect_offset sect_off; | |
3019eac3 DE |
651 | unsigned int length; |
652 | ||
653 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
654 | cu_offset type_offset_in_tu; | |
655 | }; | |
656 | ||
73869dc2 DE |
657 | /* include/dwarf2.h defines the DWP section codes. |
658 | It defines a max value but it doesn't define a min value, which we | |
659 | use for error checking, so provide one. */ | |
660 | ||
661 | enum dwp_v2_section_ids | |
662 | { | |
663 | DW_SECT_MIN = 1 | |
664 | }; | |
665 | ||
80626a55 | 666 | /* Data for one DWO file. |
57d63ce2 DE |
667 | |
668 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
669 | appears in a DWP file). DWP files don't really have DWO files per se - | |
670 | comdat folding of types "loses" the DWO file they came from, and from | |
671 | a high level view DWP files appear to contain a mass of random types. | |
672 | However, to maintain consistency with the non-DWP case we pretend DWP | |
673 | files contain virtual DWO files, and we assign each TU with one virtual | |
674 | DWO file (generally based on the line and abbrev section offsets - | |
675 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
676 | |
677 | struct dwo_file | |
678 | { | |
0ac5b59e | 679 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
680 | For virtual DWO files the name is constructed from the section offsets |
681 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
682 | from related CU+TUs. */ | |
0ac5b59e DE |
683 | const char *dwo_name; |
684 | ||
685 | /* The DW_AT_comp_dir attribute. */ | |
686 | const char *comp_dir; | |
3019eac3 | 687 | |
80626a55 DE |
688 | /* The bfd, when the file is open. Otherwise this is NULL. |
689 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
690 | bfd *dbfd; | |
3019eac3 | 691 | |
73869dc2 DE |
692 | /* The sections that make up this DWO file. |
693 | Remember that for virtual DWO files in DWP V2, these are virtual | |
694 | sections (for lack of a better name). */ | |
3019eac3 DE |
695 | struct dwo_sections sections; |
696 | ||
33c5cd75 DB |
697 | /* The CUs in the file. |
698 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
699 | an extension to handle LLVM's Link Time Optimization output (where | |
700 | multiple source files may be compiled into a single object/dwo pair). */ | |
701 | htab_t cus; | |
3019eac3 DE |
702 | |
703 | /* Table of TUs in the file. | |
704 | Each element is a struct dwo_unit. */ | |
705 | htab_t tus; | |
706 | }; | |
707 | ||
80626a55 DE |
708 | /* These sections are what may appear in a DWP file. */ |
709 | ||
710 | struct dwp_sections | |
711 | { | |
73869dc2 | 712 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
713 | struct dwarf2_section_info str; |
714 | struct dwarf2_section_info cu_index; | |
715 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
716 | |
717 | /* These are only used by DWP version 2 files. | |
718 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
719 | sections are referenced by section number, and are not recorded here. | |
720 | In DWP version 2 there is at most one copy of all these sections, each | |
721 | section being (effectively) comprised of the concatenation of all of the | |
722 | individual sections that exist in the version 1 format. | |
723 | To keep the code simple we treat each of these concatenated pieces as a | |
724 | section itself (a virtual section?). */ | |
725 | struct dwarf2_section_info abbrev; | |
726 | struct dwarf2_section_info info; | |
727 | struct dwarf2_section_info line; | |
728 | struct dwarf2_section_info loc; | |
729 | struct dwarf2_section_info macinfo; | |
730 | struct dwarf2_section_info macro; | |
731 | struct dwarf2_section_info str_offsets; | |
732 | struct dwarf2_section_info types; | |
80626a55 DE |
733 | }; |
734 | ||
73869dc2 DE |
735 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
736 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 737 | |
73869dc2 | 738 | struct virtual_v1_dwo_sections |
80626a55 DE |
739 | { |
740 | struct dwarf2_section_info abbrev; | |
741 | struct dwarf2_section_info line; | |
742 | struct dwarf2_section_info loc; | |
743 | struct dwarf2_section_info macinfo; | |
744 | struct dwarf2_section_info macro; | |
745 | struct dwarf2_section_info str_offsets; | |
746 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 747 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
748 | struct dwarf2_section_info info_or_types; |
749 | }; | |
750 | ||
73869dc2 DE |
751 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
752 | In version 2, the sections of the DWO files are concatenated together | |
753 | and stored in one section of that name. Thus each ELF section contains | |
754 | several "virtual" sections. */ | |
755 | ||
756 | struct virtual_v2_dwo_sections | |
757 | { | |
758 | bfd_size_type abbrev_offset; | |
759 | bfd_size_type abbrev_size; | |
760 | ||
761 | bfd_size_type line_offset; | |
762 | bfd_size_type line_size; | |
763 | ||
764 | bfd_size_type loc_offset; | |
765 | bfd_size_type loc_size; | |
766 | ||
767 | bfd_size_type macinfo_offset; | |
768 | bfd_size_type macinfo_size; | |
769 | ||
770 | bfd_size_type macro_offset; | |
771 | bfd_size_type macro_size; | |
772 | ||
773 | bfd_size_type str_offsets_offset; | |
774 | bfd_size_type str_offsets_size; | |
775 | ||
776 | /* Each DWP hash table entry records one CU or one TU. | |
777 | That is recorded here, and copied to dwo_unit.section. */ | |
778 | bfd_size_type info_or_types_offset; | |
779 | bfd_size_type info_or_types_size; | |
780 | }; | |
781 | ||
80626a55 DE |
782 | /* Contents of DWP hash tables. */ |
783 | ||
784 | struct dwp_hash_table | |
785 | { | |
73869dc2 | 786 | uint32_t version, nr_columns; |
80626a55 | 787 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
788 | const gdb_byte *hash_table, *unit_table; |
789 | union | |
790 | { | |
791 | struct | |
792 | { | |
793 | const gdb_byte *indices; | |
794 | } v1; | |
795 | struct | |
796 | { | |
797 | /* This is indexed by column number and gives the id of the section | |
798 | in that column. */ | |
799 | #define MAX_NR_V2_DWO_SECTIONS \ | |
800 | (1 /* .debug_info or .debug_types */ \ | |
801 | + 1 /* .debug_abbrev */ \ | |
802 | + 1 /* .debug_line */ \ | |
803 | + 1 /* .debug_loc */ \ | |
804 | + 1 /* .debug_str_offsets */ \ | |
805 | + 1 /* .debug_macro or .debug_macinfo */) | |
806 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
807 | const gdb_byte *offsets; | |
808 | const gdb_byte *sizes; | |
809 | } v2; | |
810 | } section_pool; | |
80626a55 DE |
811 | }; |
812 | ||
813 | /* Data for one DWP file. */ | |
814 | ||
815 | struct dwp_file | |
816 | { | |
400174b1 TT |
817 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
818 | : name (name_), | |
819 | dbfd (std::move (abfd)) | |
820 | { | |
821 | } | |
822 | ||
80626a55 DE |
823 | /* Name of the file. */ |
824 | const char *name; | |
825 | ||
73869dc2 | 826 | /* File format version. */ |
400174b1 | 827 | int version = 0; |
73869dc2 | 828 | |
93417882 | 829 | /* The bfd. */ |
400174b1 | 830 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
831 | |
832 | /* Section info for this file. */ | |
400174b1 | 833 | struct dwp_sections sections {}; |
80626a55 | 834 | |
57d63ce2 | 835 | /* Table of CUs in the file. */ |
400174b1 | 836 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
837 | |
838 | /* Table of TUs in the file. */ | |
400174b1 | 839 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 840 | |
19ac8c2e | 841 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
400174b1 TT |
842 | htab_t loaded_cus {}; |
843 | htab_t loaded_tus {}; | |
80626a55 | 844 | |
73869dc2 DE |
845 | /* Table to map ELF section numbers to their sections. |
846 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
847 | unsigned int num_sections = 0; |
848 | asection **elf_sections = nullptr; | |
80626a55 DE |
849 | }; |
850 | ||
36586728 TT |
851 | /* This represents a '.dwz' file. */ |
852 | ||
853 | struct dwz_file | |
854 | { | |
7ff8cb8c TT |
855 | dwz_file (gdb_bfd_ref_ptr &&bfd) |
856 | : dwz_bfd (std::move (bfd)) | |
857 | { | |
858 | } | |
859 | ||
36586728 | 860 | /* A dwz file can only contain a few sections. */ |
7ff8cb8c TT |
861 | struct dwarf2_section_info abbrev {}; |
862 | struct dwarf2_section_info info {}; | |
863 | struct dwarf2_section_info str {}; | |
864 | struct dwarf2_section_info line {}; | |
865 | struct dwarf2_section_info macro {}; | |
866 | struct dwarf2_section_info gdb_index {}; | |
867 | struct dwarf2_section_info debug_names {}; | |
36586728 TT |
868 | |
869 | /* The dwz's BFD. */ | |
7ff8cb8c | 870 | gdb_bfd_ref_ptr dwz_bfd; |
36586728 TT |
871 | }; |
872 | ||
0963b4bd MS |
873 | /* Struct used to pass misc. parameters to read_die_and_children, et |
874 | al. which are used for both .debug_info and .debug_types dies. | |
875 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 876 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
877 | |
878 | struct die_reader_specs | |
879 | { | |
a32a8923 | 880 | /* The bfd of die_section. */ |
93311388 DE |
881 | bfd* abfd; |
882 | ||
883 | /* The CU of the DIE we are parsing. */ | |
884 | struct dwarf2_cu *cu; | |
885 | ||
80626a55 | 886 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
887 | struct dwo_file *dwo_file; |
888 | ||
dee91e82 | 889 | /* The section the die comes from. |
3019eac3 | 890 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
891 | struct dwarf2_section_info *die_section; |
892 | ||
893 | /* die_section->buffer. */ | |
d521ce57 | 894 | const gdb_byte *buffer; |
f664829e DE |
895 | |
896 | /* The end of the buffer. */ | |
897 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
898 | |
899 | /* The value of the DW_AT_comp_dir attribute. */ | |
900 | const char *comp_dir; | |
685af9cd TT |
901 | |
902 | /* The abbreviation table to use when reading the DIEs. */ | |
903 | struct abbrev_table *abbrev_table; | |
93311388 DE |
904 | }; |
905 | ||
fd820528 | 906 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 907 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 908 | const gdb_byte *info_ptr, |
dee91e82 DE |
909 | struct die_info *comp_unit_die, |
910 | int has_children, | |
911 | void *data); | |
912 | ||
ecfb656c PA |
913 | /* A 1-based directory index. This is a strong typedef to prevent |
914 | accidentally using a directory index as a 0-based index into an | |
915 | array/vector. */ | |
916 | enum class dir_index : unsigned int {}; | |
917 | ||
918 | /* Likewise, a 1-based file name index. */ | |
919 | enum class file_name_index : unsigned int {}; | |
920 | ||
52059ffd TT |
921 | struct file_entry |
922 | { | |
fff8551c PA |
923 | file_entry () = default; |
924 | ||
ecfb656c | 925 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
926 | unsigned int mod_time_, unsigned int length_) |
927 | : name (name_), | |
ecfb656c | 928 | d_index (d_index_), |
fff8551c PA |
929 | mod_time (mod_time_), |
930 | length (length_) | |
931 | {} | |
932 | ||
ecfb656c PA |
933 | /* Return the include directory at D_INDEX stored in LH. Returns |
934 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
935 | const char *include_dir (const line_header *lh) const; |
936 | ||
fff8551c PA |
937 | /* The file name. Note this is an observing pointer. The memory is |
938 | owned by debug_line_buffer. */ | |
939 | const char *name {}; | |
940 | ||
8c43009f | 941 | /* The directory index (1-based). */ |
ecfb656c | 942 | dir_index d_index {}; |
fff8551c PA |
943 | |
944 | unsigned int mod_time {}; | |
945 | ||
946 | unsigned int length {}; | |
947 | ||
948 | /* True if referenced by the Line Number Program. */ | |
949 | bool included_p {}; | |
950 | ||
83769d0b | 951 | /* The associated symbol table, if any. */ |
fff8551c | 952 | struct symtab *symtab {}; |
52059ffd TT |
953 | }; |
954 | ||
debd256d JB |
955 | /* The line number information for a compilation unit (found in the |
956 | .debug_line section) begins with a "statement program header", | |
957 | which contains the following information. */ | |
958 | struct line_header | |
959 | { | |
fff8551c PA |
960 | line_header () |
961 | : offset_in_dwz {} | |
962 | {} | |
963 | ||
964 | /* Add an entry to the include directory table. */ | |
965 | void add_include_dir (const char *include_dir); | |
966 | ||
967 | /* Add an entry to the file name table. */ | |
ecfb656c | 968 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
969 | unsigned int mod_time, unsigned int length); |
970 | ||
ecfb656c | 971 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 972 | is out of bounds. */ |
ecfb656c | 973 | const char *include_dir_at (dir_index index) const |
8c43009f | 974 | { |
ecfb656c PA |
975 | /* Convert directory index number (1-based) to vector index |
976 | (0-based). */ | |
977 | size_t vec_index = to_underlying (index) - 1; | |
978 | ||
979 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 980 | return NULL; |
ecfb656c | 981 | return include_dirs[vec_index]; |
8c43009f PA |
982 | } |
983 | ||
ecfb656c | 984 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 985 | is out of bounds. */ |
ecfb656c | 986 | file_entry *file_name_at (file_name_index index) |
8c43009f | 987 | { |
ecfb656c PA |
988 | /* Convert file name index number (1-based) to vector index |
989 | (0-based). */ | |
990 | size_t vec_index = to_underlying (index) - 1; | |
991 | ||
992 | if (vec_index >= file_names.size ()) | |
fff8551c | 993 | return NULL; |
ecfb656c | 994 | return &file_names[vec_index]; |
fff8551c PA |
995 | } |
996 | ||
997 | /* Const version of the above. */ | |
998 | const file_entry *file_name_at (unsigned int index) const | |
999 | { | |
1000 | if (index >= file_names.size ()) | |
8c43009f PA |
1001 | return NULL; |
1002 | return &file_names[index]; | |
1003 | } | |
1004 | ||
527f3840 | 1005 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1006 | sect_offset sect_off {}; |
527f3840 JK |
1007 | |
1008 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1009 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1010 | ||
1011 | unsigned int total_length {}; | |
1012 | unsigned short version {}; | |
1013 | unsigned int header_length {}; | |
1014 | unsigned char minimum_instruction_length {}; | |
1015 | unsigned char maximum_ops_per_instruction {}; | |
1016 | unsigned char default_is_stmt {}; | |
1017 | int line_base {}; | |
1018 | unsigned char line_range {}; | |
1019 | unsigned char opcode_base {}; | |
debd256d JB |
1020 | |
1021 | /* standard_opcode_lengths[i] is the number of operands for the | |
1022 | standard opcode whose value is i. This means that | |
1023 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1024 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1025 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1026 | |
fff8551c PA |
1027 | /* The include_directories table. Note these are observing |
1028 | pointers. The memory is owned by debug_line_buffer. */ | |
1029 | std::vector<const char *> include_dirs; | |
debd256d | 1030 | |
fff8551c PA |
1031 | /* The file_names table. */ |
1032 | std::vector<file_entry> file_names; | |
debd256d JB |
1033 | |
1034 | /* The start and end of the statement program following this | |
6502dd73 | 1035 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1036 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1037 | }; |
c906108c | 1038 | |
fff8551c PA |
1039 | typedef std::unique_ptr<line_header> line_header_up; |
1040 | ||
8c43009f PA |
1041 | const char * |
1042 | file_entry::include_dir (const line_header *lh) const | |
1043 | { | |
ecfb656c | 1044 | return lh->include_dir_at (d_index); |
8c43009f PA |
1045 | } |
1046 | ||
c906108c | 1047 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1048 | need this much information. */ |
6f06d47b | 1049 | struct partial_die_info : public allocate_on_obstack |
c906108c | 1050 | { |
6f06d47b YQ |
1051 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
1052 | ||
1053 | /* Disable assign but still keep copy ctor, which is needed | |
1054 | load_partial_dies. */ | |
1055 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
1056 | ||
52356b79 YQ |
1057 | /* Adjust the partial die before generating a symbol for it. This |
1058 | function may set the is_external flag or change the DIE's | |
1059 | name. */ | |
1060 | void fixup (struct dwarf2_cu *cu); | |
1061 | ||
48fbe735 YQ |
1062 | /* Read a minimal amount of information into the minimal die |
1063 | structure. */ | |
1064 | const gdb_byte *read (const struct die_reader_specs *reader, | |
1065 | const struct abbrev_info &abbrev, | |
1066 | const gdb_byte *info_ptr); | |
1067 | ||
72bf9492 | 1068 | /* Offset of this DIE. */ |
6f06d47b | 1069 | const sect_offset sect_off; |
72bf9492 DJ |
1070 | |
1071 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 1072 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 1073 | |
72bf9492 | 1074 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
1075 | const unsigned int has_children : 1; |
1076 | ||
72bf9492 DJ |
1077 | unsigned int is_external : 1; |
1078 | unsigned int is_declaration : 1; | |
1079 | unsigned int has_type : 1; | |
1080 | unsigned int has_specification : 1; | |
1081 | unsigned int has_pc_info : 1; | |
481860b3 | 1082 | unsigned int may_be_inlined : 1; |
72bf9492 | 1083 | |
0c1b455e TT |
1084 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1085 | unsigned int main_subprogram : 1; | |
1086 | ||
72bf9492 DJ |
1087 | /* Flag set if the SCOPE field of this structure has been |
1088 | computed. */ | |
1089 | unsigned int scope_set : 1; | |
1090 | ||
fa4028e9 JB |
1091 | /* Flag set if the DIE has a byte_size attribute. */ |
1092 | unsigned int has_byte_size : 1; | |
1093 | ||
ff908ebf AW |
1094 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1095 | unsigned int has_const_value : 1; | |
1096 | ||
98bfdba5 PA |
1097 | /* Flag set if any of the DIE's children are template arguments. */ |
1098 | unsigned int has_template_arguments : 1; | |
1099 | ||
52356b79 | 1100 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
1101 | unsigned int fixup_called : 1; |
1102 | ||
36586728 TT |
1103 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1104 | unsigned int is_dwz : 1; | |
1105 | ||
1106 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1107 | unsigned int spec_is_dwz : 1; | |
1108 | ||
72bf9492 | 1109 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1110 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 1111 | const char *name = nullptr; |
72bf9492 | 1112 | |
abc72ce4 | 1113 | /* The linkage name, if present. */ |
6f06d47b | 1114 | const char *linkage_name = nullptr; |
abc72ce4 | 1115 | |
72bf9492 DJ |
1116 | /* The scope to prepend to our children. This is generally |
1117 | allocated on the comp_unit_obstack, so will disappear | |
1118 | when this compilation unit leaves the cache. */ | |
6f06d47b | 1119 | const char *scope = nullptr; |
72bf9492 | 1120 | |
95554aad TT |
1121 | /* Some data associated with the partial DIE. The tag determines |
1122 | which field is live. */ | |
1123 | union | |
1124 | { | |
1125 | /* The location description associated with this DIE, if any. */ | |
1126 | struct dwarf_block *locdesc; | |
1127 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1128 | sect_offset sect_off; |
6f06d47b | 1129 | } d {}; |
72bf9492 DJ |
1130 | |
1131 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
1132 | CORE_ADDR lowpc = 0; |
1133 | CORE_ADDR highpc = 0; | |
72bf9492 | 1134 | |
93311388 | 1135 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1136 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1137 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1138 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1139 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1140 | |
1141 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1142 | DW_AT_specification (or DW_AT_abstract_origin or | |
1143 | DW_AT_extension). */ | |
6f06d47b | 1144 | sect_offset spec_offset {}; |
72bf9492 DJ |
1145 | |
1146 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1147 | if any. */ | |
6f06d47b YQ |
1148 | struct partial_die_info *die_parent = nullptr; |
1149 | struct partial_die_info *die_child = nullptr; | |
1150 | struct partial_die_info *die_sibling = nullptr; | |
1151 | ||
1152 | friend struct partial_die_info * | |
1153 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1154 | ||
1155 | private: | |
1156 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1157 | partial_die_info (sect_offset sect_off) | |
1158 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1159 | { | |
1160 | } | |
1161 | ||
1162 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1163 | int has_children_) | |
1164 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1165 | { | |
1166 | is_external = 0; | |
1167 | is_declaration = 0; | |
1168 | has_type = 0; | |
1169 | has_specification = 0; | |
1170 | has_pc_info = 0; | |
1171 | may_be_inlined = 0; | |
1172 | main_subprogram = 0; | |
1173 | scope_set = 0; | |
1174 | has_byte_size = 0; | |
1175 | has_const_value = 0; | |
1176 | has_template_arguments = 0; | |
1177 | fixup_called = 0; | |
1178 | is_dwz = 0; | |
1179 | spec_is_dwz = 0; | |
1180 | } | |
c906108c SS |
1181 | }; |
1182 | ||
0963b4bd | 1183 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1184 | struct abbrev_info |
1185 | { | |
1186 | unsigned int number; /* number identifying abbrev */ | |
1187 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1188 | unsigned short has_children; /* boolean */ |
1189 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1190 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1191 | struct abbrev_info *next; /* next in chain */ | |
1192 | }; | |
1193 | ||
1194 | struct attr_abbrev | |
1195 | { | |
9d25dd43 DE |
1196 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1197 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1198 | |
1199 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1200 | LONGEST implicit_const; | |
c906108c SS |
1201 | }; |
1202 | ||
433df2d4 DE |
1203 | /* Size of abbrev_table.abbrev_hash_table. */ |
1204 | #define ABBREV_HASH_SIZE 121 | |
1205 | ||
1206 | /* Top level data structure to contain an abbreviation table. */ | |
1207 | ||
1208 | struct abbrev_table | |
1209 | { | |
685af9cd TT |
1210 | explicit abbrev_table (sect_offset off) |
1211 | : sect_off (off) | |
1212 | { | |
4a17f768 | 1213 | m_abbrevs = |
685af9cd | 1214 | XOBNEWVEC (&abbrev_obstack, struct abbrev_info *, ABBREV_HASH_SIZE); |
4a17f768 | 1215 | memset (m_abbrevs, 0, ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); |
685af9cd TT |
1216 | } |
1217 | ||
1218 | DISABLE_COPY_AND_ASSIGN (abbrev_table); | |
1219 | ||
1220 | /* Allocate space for a struct abbrev_info object in | |
1221 | ABBREV_TABLE. */ | |
1222 | struct abbrev_info *alloc_abbrev (); | |
1223 | ||
1224 | /* Add an abbreviation to the table. */ | |
1225 | void add_abbrev (unsigned int abbrev_number, struct abbrev_info *abbrev); | |
1226 | ||
1227 | /* Look up an abbrev in the table. | |
1228 | Returns NULL if the abbrev is not found. */ | |
1229 | ||
1230 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number); | |
1231 | ||
1232 | ||
f4dc4d17 DE |
1233 | /* Where the abbrev table came from. |
1234 | This is used as a sanity check when the table is used. */ | |
685af9cd | 1235 | const sect_offset sect_off; |
433df2d4 DE |
1236 | |
1237 | /* Storage for the abbrev table. */ | |
685af9cd | 1238 | auto_obstack abbrev_obstack; |
433df2d4 | 1239 | |
4a17f768 YQ |
1240 | private: |
1241 | ||
433df2d4 DE |
1242 | /* Hash table of abbrevs. |
1243 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1244 | It could be statically allocated, but the previous code didn't so we | |
1245 | don't either. */ | |
4a17f768 | 1246 | struct abbrev_info **m_abbrevs; |
433df2d4 DE |
1247 | }; |
1248 | ||
685af9cd TT |
1249 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
1250 | ||
0963b4bd | 1251 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1252 | struct attribute |
1253 | { | |
9d25dd43 | 1254 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1255 | ENUM_BITFIELD(dwarf_form) form : 15; |
1256 | ||
1257 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1258 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1259 | here for better struct attribute alignment. */ | |
1260 | unsigned int string_is_canonical : 1; | |
1261 | ||
b60c80d6 DJ |
1262 | union |
1263 | { | |
15d034d0 | 1264 | const char *str; |
b60c80d6 | 1265 | struct dwarf_block *blk; |
43bbcdc2 PH |
1266 | ULONGEST unsnd; |
1267 | LONGEST snd; | |
b60c80d6 | 1268 | CORE_ADDR addr; |
ac9ec31b | 1269 | ULONGEST signature; |
b60c80d6 DJ |
1270 | } |
1271 | u; | |
1272 | }; | |
1273 | ||
0963b4bd | 1274 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1275 | struct die_info |
1276 | { | |
76815b17 DE |
1277 | /* DWARF-2 tag for this DIE. */ |
1278 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1279 | ||
1280 | /* Number of attributes */ | |
98bfdba5 PA |
1281 | unsigned char num_attrs; |
1282 | ||
1283 | /* True if we're presently building the full type name for the | |
1284 | type derived from this DIE. */ | |
1285 | unsigned char building_fullname : 1; | |
76815b17 | 1286 | |
adde2bff DE |
1287 | /* True if this die is in process. PR 16581. */ |
1288 | unsigned char in_process : 1; | |
1289 | ||
76815b17 DE |
1290 | /* Abbrev number */ |
1291 | unsigned int abbrev; | |
1292 | ||
93311388 | 1293 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1294 | sect_offset sect_off; |
78ba4af6 JB |
1295 | |
1296 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1297 | points to this die's parent; CHILD points to the first child of | |
1298 | this node; and all the children of a given node are chained | |
4950bc1c | 1299 | together via their SIBLING fields. */ |
639d11d3 DC |
1300 | struct die_info *child; /* Its first child, if any. */ |
1301 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1302 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1303 | |
b60c80d6 DJ |
1304 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1305 | zero, but it's not common and zero-sized arrays are not | |
1306 | sufficiently portable C. */ | |
1307 | struct attribute attrs[1]; | |
c906108c SS |
1308 | }; |
1309 | ||
0963b4bd | 1310 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1311 | |
1312 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1313 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1314 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1315 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1316 | #define DW_SND(attr) ((attr)->u.snd) | |
1317 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1318 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1319 | |
0963b4bd | 1320 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1321 | struct dwarf_block |
1322 | { | |
56eb65bd | 1323 | size_t size; |
1d6edc3c JK |
1324 | |
1325 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1326 | const gdb_byte *data; |
c906108c SS |
1327 | }; |
1328 | ||
c906108c SS |
1329 | #ifndef ATTR_ALLOC_CHUNK |
1330 | #define ATTR_ALLOC_CHUNK 4 | |
1331 | #endif | |
1332 | ||
c906108c SS |
1333 | /* Allocate fields for structs, unions and enums in this size. */ |
1334 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1335 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1336 | #endif | |
1337 | ||
c906108c SS |
1338 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1339 | but this would require a corresponding change in unpack_field_as_long | |
1340 | and friends. */ | |
1341 | static int bits_per_byte = 8; | |
1342 | ||
2ddeaf8a TT |
1343 | /* When reading a variant or variant part, we track a bit more |
1344 | information about the field, and store it in an object of this | |
1345 | type. */ | |
1346 | ||
1347 | struct variant_field | |
1348 | { | |
1349 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1350 | value. */ | |
1351 | ULONGEST discriminant_value; | |
1352 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1353 | default branch. */ | |
1354 | bool default_branch; | |
1355 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1356 | field is the discriminant. */ | |
1357 | bool is_discriminant; | |
1358 | }; | |
1359 | ||
52059ffd TT |
1360 | struct nextfield |
1361 | { | |
be2daae6 TT |
1362 | int accessibility = 0; |
1363 | int virtuality = 0; | |
2ddeaf8a | 1364 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1365 | struct variant_field variant {}; |
1366 | struct field field {}; | |
52059ffd TT |
1367 | }; |
1368 | ||
1369 | struct fnfieldlist | |
1370 | { | |
be2daae6 TT |
1371 | const char *name = nullptr; |
1372 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1373 | }; |
1374 | ||
c906108c SS |
1375 | /* The routines that read and process dies for a C struct or C++ class |
1376 | pass lists of data member fields and lists of member function fields | |
1377 | in an instance of a field_info structure, as defined below. */ | |
1378 | struct field_info | |
c5aa993b | 1379 | { |
0963b4bd | 1380 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1381 | std::vector<struct nextfield> fields; |
1382 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1383 | |
7d0ccb61 | 1384 | /* Number of fields (including baseclasses). */ |
be2daae6 | 1385 | int nfields = 0; |
c906108c | 1386 | |
c5aa993b | 1387 | /* Set if the accesibility of one of the fields is not public. */ |
be2daae6 | 1388 | int non_public_fields = 0; |
c906108c | 1389 | |
c5aa993b JM |
1390 | /* Member function fieldlist array, contains name of possibly overloaded |
1391 | member function, number of overloaded member functions and a pointer | |
1392 | to the head of the member function field chain. */ | |
be2daae6 | 1393 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1394 | |
1395 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1396 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1397 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1398 | |
1399 | /* Nested types defined by this class and the number of elements in this | |
1400 | list. */ | |
be2daae6 | 1401 | std::vector<struct decl_field> nested_types_list; |
c5aa993b | 1402 | }; |
c906108c | 1403 | |
10b3939b DJ |
1404 | /* One item on the queue of compilation units to read in full symbols |
1405 | for. */ | |
1406 | struct dwarf2_queue_item | |
1407 | { | |
1408 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1409 | enum language pretend_language; |
10b3939b DJ |
1410 | struct dwarf2_queue_item *next; |
1411 | }; | |
1412 | ||
1413 | /* The current queue. */ | |
1414 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1415 | ||
ae038cb0 DJ |
1416 | /* Loaded secondary compilation units are kept in memory until they |
1417 | have not been referenced for the processing of this many | |
1418 | compilation units. Set this to zero to disable caching. Cache | |
1419 | sizes of up to at least twenty will improve startup time for | |
1420 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1421 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1422 | static void |
b4f54984 DE |
1423 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1424 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1425 | { |
3e43a32a | 1426 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1427 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1428 | value); |
1429 | } | |
4390d890 | 1430 | \f |
c906108c SS |
1431 | /* local function prototypes */ |
1432 | ||
a32a8923 DE |
1433 | static const char *get_section_name (const struct dwarf2_section_info *); |
1434 | ||
1435 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1436 | ||
918dd910 JK |
1437 | static void dwarf2_find_base_address (struct die_info *die, |
1438 | struct dwarf2_cu *cu); | |
1439 | ||
0018ea6f DE |
1440 | static struct partial_symtab *create_partial_symtab |
1441 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1442 | ||
f1902523 JK |
1443 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1444 | const gdb_byte *info_ptr, | |
1445 | struct die_info *type_unit_die, | |
1446 | int has_children, void *data); | |
1447 | ||
ed2dc618 SM |
1448 | static void dwarf2_build_psymtabs_hard |
1449 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1450 | |
72bf9492 DJ |
1451 | static void scan_partial_symbols (struct partial_die_info *, |
1452 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1453 | int, struct dwarf2_cu *); |
c906108c | 1454 | |
72bf9492 DJ |
1455 | static void add_partial_symbol (struct partial_die_info *, |
1456 | struct dwarf2_cu *); | |
63d06c5c | 1457 | |
72bf9492 DJ |
1458 | static void add_partial_namespace (struct partial_die_info *pdi, |
1459 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1460 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1461 | |
5d7cb8df | 1462 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1463 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1464 | struct dwarf2_cu *cu); |
1465 | ||
72bf9492 DJ |
1466 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1467 | struct dwarf2_cu *cu); | |
91c24f0a | 1468 | |
bc30ff58 JB |
1469 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1470 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1471 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1472 | |
257e7a09 YQ |
1473 | static void dwarf2_read_symtab (struct partial_symtab *, |
1474 | struct objfile *); | |
c906108c | 1475 | |
a14ed312 | 1476 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1477 | |
685af9cd | 1478 | static abbrev_table_up abbrev_table_read_table |
ed2dc618 SM |
1479 | (struct dwarf2_per_objfile *dwarf2_per_objfile, struct dwarf2_section_info *, |
1480 | sect_offset); | |
433df2d4 | 1481 | |
d521ce57 | 1482 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1483 | |
dee91e82 | 1484 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1485 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1486 | |
36586728 | 1487 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1488 | struct dwarf2_cu *); |
72bf9492 | 1489 | |
d521ce57 TT |
1490 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1491 | struct attribute *, struct attr_abbrev *, | |
1492 | const gdb_byte *); | |
a8329558 | 1493 | |
a1855c1d | 1494 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1495 | |
a1855c1d | 1496 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1497 | |
a1855c1d | 1498 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1499 | |
a1855c1d | 1500 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1501 | |
a1855c1d | 1502 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1503 | |
d521ce57 | 1504 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1505 | unsigned int *); |
c906108c | 1506 | |
d521ce57 | 1507 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1508 | |
1509 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1510 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1511 | unsigned int *, unsigned int *); |
613e1657 | 1512 | |
d521ce57 TT |
1513 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1514 | const struct comp_unit_head *, | |
c764a876 DE |
1515 | unsigned int *); |
1516 | ||
d521ce57 | 1517 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1518 | |
ed2dc618 SM |
1519 | static sect_offset read_abbrev_offset |
1520 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1521 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1522 | |
d521ce57 | 1523 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1524 | |
d521ce57 | 1525 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1526 | |
ed2dc618 SM |
1527 | static const char *read_indirect_string |
1528 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1529 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1530 | |
ed2dc618 SM |
1531 | static const char *read_indirect_line_string |
1532 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1533 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1534 | |
ed2dc618 SM |
1535 | static const char *read_indirect_string_at_offset |
1536 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1537 | LONGEST str_offset); | |
927aa2e7 | 1538 | |
ed2dc618 SM |
1539 | static const char *read_indirect_string_from_dwz |
1540 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1541 | |
d521ce57 | 1542 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1543 | |
d521ce57 TT |
1544 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1545 | const gdb_byte *, | |
3019eac3 DE |
1546 | unsigned int *); |
1547 | ||
d521ce57 | 1548 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1549 | ULONGEST str_index); |
3019eac3 | 1550 | |
e142c38c | 1551 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1552 | |
e142c38c DJ |
1553 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1554 | struct dwarf2_cu *); | |
c906108c | 1555 | |
348e048f | 1556 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1557 | unsigned int); |
348e048f | 1558 | |
7d45c7c3 KB |
1559 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1560 | struct dwarf2_cu *cu); | |
1561 | ||
05cf31d1 JB |
1562 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1563 | struct dwarf2_cu *cu); | |
1564 | ||
e142c38c | 1565 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1566 | |
e142c38c | 1567 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1568 | struct dwarf2_cu **); |
63d06c5c | 1569 | |
9c541725 | 1570 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1571 | struct dwarf2_cu *cu); |
debd256d | 1572 | |
f3f5162e | 1573 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1574 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1575 | CORE_ADDR, int decode_mapping); |
c906108c | 1576 | |
804d2729 TT |
1577 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1578 | const char *); | |
c906108c | 1579 | |
43f3e411 DE |
1580 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1581 | const char *, const char *, | |
1582 | CORE_ADDR); | |
f4dc4d17 | 1583 | |
a14ed312 | 1584 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1585 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1586 | |
ff39bb5e | 1587 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1588 | struct dwarf2_cu *); |
c906108c | 1589 | |
ff39bb5e | 1590 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1591 | struct type *type, |
1592 | const char *name, | |
1593 | struct obstack *obstack, | |
12df843f | 1594 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1595 | const gdb_byte **bytes, |
98bfdba5 | 1596 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1597 | |
e7c27a73 | 1598 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1599 | |
b4ba55a1 JB |
1600 | static int need_gnat_info (struct dwarf2_cu *); |
1601 | ||
3e43a32a MS |
1602 | static struct type *die_descriptive_type (struct die_info *, |
1603 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1604 | |
1605 | static void set_descriptive_type (struct type *, struct die_info *, | |
1606 | struct dwarf2_cu *); | |
1607 | ||
e7c27a73 DJ |
1608 | static struct type *die_containing_type (struct die_info *, |
1609 | struct dwarf2_cu *); | |
c906108c | 1610 | |
ff39bb5e | 1611 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1612 | struct dwarf2_cu *); |
c906108c | 1613 | |
f792889a | 1614 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1615 | |
673bfd45 DE |
1616 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1617 | ||
0d5cff50 | 1618 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1619 | |
6e70227d | 1620 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1621 | const char *suffix, int physname, |
1622 | struct dwarf2_cu *cu); | |
63d06c5c | 1623 | |
e7c27a73 | 1624 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1625 | |
348e048f DE |
1626 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1627 | ||
e7c27a73 | 1628 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1629 | |
e7c27a73 | 1630 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1631 | |
96408a79 SA |
1632 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1633 | ||
71a3c369 TT |
1634 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1635 | ||
ff013f42 JK |
1636 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1637 | struct dwarf2_cu *, struct partial_symtab *); | |
1638 | ||
3a2b436a | 1639 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1640 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1641 | enum pc_bounds_kind |
1642 | { | |
e385593e | 1643 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1644 | PC_BOUNDS_NOT_PRESENT, |
1645 | ||
e385593e JK |
1646 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1647 | were present but they do not form a valid range of PC addresses. */ | |
1648 | PC_BOUNDS_INVALID, | |
1649 | ||
3a2b436a JK |
1650 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1651 | PC_BOUNDS_RANGES, | |
1652 | ||
1653 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1654 | PC_BOUNDS_HIGH_LOW, | |
1655 | }; | |
1656 | ||
1657 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1658 | CORE_ADDR *, CORE_ADDR *, | |
1659 | struct dwarf2_cu *, | |
1660 | struct partial_symtab *); | |
c906108c | 1661 | |
fae299cd DC |
1662 | static void get_scope_pc_bounds (struct die_info *, |
1663 | CORE_ADDR *, CORE_ADDR *, | |
1664 | struct dwarf2_cu *); | |
1665 | ||
801e3a5b JB |
1666 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1667 | CORE_ADDR, struct dwarf2_cu *); | |
1668 | ||
a14ed312 | 1669 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1670 | struct dwarf2_cu *); |
c906108c | 1671 | |
a14ed312 | 1672 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1673 | struct type *, struct dwarf2_cu *); |
c906108c | 1674 | |
a14ed312 | 1675 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1676 | struct die_info *, struct type *, |
e7c27a73 | 1677 | struct dwarf2_cu *); |
c906108c | 1678 | |
a14ed312 | 1679 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1680 | struct type *, |
1681 | struct dwarf2_cu *); | |
c906108c | 1682 | |
134d01f1 | 1683 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1684 | |
e7c27a73 | 1685 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1686 | |
e7c27a73 | 1687 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1688 | |
5d7cb8df JK |
1689 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1690 | ||
804d2729 | 1691 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1692 | |
27aa8d6a SW |
1693 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1694 | ||
74921315 KS |
1695 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1696 | ||
f55ee35c JK |
1697 | static struct type *read_module_type (struct die_info *die, |
1698 | struct dwarf2_cu *cu); | |
1699 | ||
38d518c9 | 1700 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1701 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1702 | |
134d01f1 | 1703 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1704 | |
e7c27a73 | 1705 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1706 | |
6e70227d | 1707 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1708 | struct dwarf2_cu *); |
1709 | ||
bf6af496 | 1710 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1711 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1712 | struct die_info *); |
639d11d3 | 1713 | |
dee91e82 | 1714 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1715 | const gdb_byte *info_ptr, |
1716 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1717 | struct die_info *parent); |
1718 | ||
d521ce57 TT |
1719 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1720 | struct die_info **, const gdb_byte *, | |
1721 | int *, int); | |
3019eac3 | 1722 | |
d521ce57 TT |
1723 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1724 | struct die_info **, const gdb_byte *, | |
1725 | int *); | |
93311388 | 1726 | |
e7c27a73 | 1727 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1728 | |
15d034d0 TT |
1729 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1730 | struct obstack *); | |
71c25dea | 1731 | |
15d034d0 | 1732 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1733 | |
15d034d0 | 1734 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1735 | struct die_info *die, |
1736 | struct dwarf2_cu *cu); | |
1737 | ||
ca69b9e6 DE |
1738 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1739 | struct dwarf2_cu *cu); | |
1740 | ||
e142c38c | 1741 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1742 | struct dwarf2_cu **); |
9219021c | 1743 | |
f39c6ffd | 1744 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1745 | |
f39c6ffd | 1746 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1747 | |
f39c6ffd | 1748 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1749 | |
a121b7c1 | 1750 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1751 | |
f39c6ffd | 1752 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1753 | |
f9aca02d | 1754 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1755 | |
d97bc12b DE |
1756 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1757 | ||
1758 | static void dump_die_for_error (struct die_info *); | |
1759 | ||
1760 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1761 | struct die_info *); | |
c906108c | 1762 | |
d97bc12b | 1763 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1764 | |
51545339 | 1765 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1766 | struct dwarf2_cu *); |
c906108c | 1767 | |
ff39bb5e | 1768 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1769 | |
ff39bb5e | 1770 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1771 | |
348e048f | 1772 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1773 | const struct attribute *, |
348e048f DE |
1774 | struct dwarf2_cu **); |
1775 | ||
10b3939b | 1776 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1777 | const struct attribute *, |
f2f0e013 | 1778 | struct dwarf2_cu **); |
c906108c | 1779 | |
348e048f | 1780 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1781 | const struct attribute *, |
348e048f DE |
1782 | struct dwarf2_cu **); |
1783 | ||
ac9ec31b DE |
1784 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1785 | struct dwarf2_cu *); | |
1786 | ||
1787 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1788 | const struct attribute *, |
ac9ec31b DE |
1789 | struct dwarf2_cu *); |
1790 | ||
e5fe5e75 | 1791 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1792 | |
52dc124a | 1793 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1794 | |
63e43d3a PMR |
1795 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1796 | struct die_info *die, struct dwarf2_cu *cu, | |
1797 | struct dynamic_prop *prop); | |
1798 | ||
c906108c SS |
1799 | /* memory allocation interface */ |
1800 | ||
7b5a2f43 | 1801 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1802 | |
b60c80d6 | 1803 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1804 | |
43f3e411 | 1805 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1806 | |
6e5a29e1 | 1807 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1808 | |
6e5a29e1 | 1809 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1810 | |
6e5a29e1 | 1811 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1812 | |
6e5a29e1 | 1813 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1814 | |
8cf6f0b1 TT |
1815 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1816 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1817 | const struct attribute *attr); |
8cf6f0b1 | 1818 | |
ff39bb5e | 1819 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1820 | struct symbol *sym, |
f1e6e072 TT |
1821 | struct dwarf2_cu *cu, |
1822 | int is_block); | |
4c2df51b | 1823 | |
d521ce57 TT |
1824 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1825 | const gdb_byte *info_ptr, | |
1826 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1827 | |
72bf9492 DJ |
1828 | static hashval_t partial_die_hash (const void *item); |
1829 | ||
1830 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1831 | ||
ae038cb0 | 1832 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1833 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1834 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1835 | |
9816fde3 | 1836 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1837 | struct die_info *comp_unit_die, |
1838 | enum language pretend_language); | |
93311388 | 1839 | |
ed2dc618 | 1840 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1841 | |
dee91e82 | 1842 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1843 | |
f792889a DJ |
1844 | static struct type *set_die_type (struct die_info *, struct type *, |
1845 | struct dwarf2_cu *); | |
1c379e20 | 1846 | |
ed2dc618 | 1847 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1848 | |
ed2dc618 | 1849 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1850 | |
58f0c718 | 1851 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1852 | enum language); |
10b3939b | 1853 | |
95554aad TT |
1854 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1855 | enum language); | |
10b3939b | 1856 | |
f4dc4d17 DE |
1857 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1858 | enum language); | |
1859 | ||
10b3939b DJ |
1860 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1861 | struct dwarf2_per_cu_data *); | |
1862 | ||
ae038cb0 DJ |
1863 | static void dwarf2_mark (struct dwarf2_cu *); |
1864 | ||
1865 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1866 | ||
b64f50a1 | 1867 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1868 | struct dwarf2_per_cu_data *); |
673bfd45 | 1869 | |
f792889a | 1870 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1871 | |
95554aad TT |
1872 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1873 | enum language pretend_language); | |
1874 | ||
ed2dc618 | 1875 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1876 | |
b303c6f6 AB |
1877 | /* Class, the destructor of which frees all allocated queue entries. This |
1878 | will only have work to do if an error was thrown while processing the | |
1879 | dwarf. If no error was thrown then the queue entries should have all | |
1880 | been processed, and freed, as we went along. */ | |
1881 | ||
1882 | class dwarf2_queue_guard | |
1883 | { | |
1884 | public: | |
1885 | dwarf2_queue_guard () = default; | |
1886 | ||
1887 | /* Free any entries remaining on the queue. There should only be | |
1888 | entries left if we hit an error while processing the dwarf. */ | |
1889 | ~dwarf2_queue_guard () | |
1890 | { | |
1891 | struct dwarf2_queue_item *item, *last; | |
1892 | ||
1893 | item = dwarf2_queue; | |
1894 | while (item) | |
1895 | { | |
1896 | /* Anything still marked queued is likely to be in an | |
1897 | inconsistent state, so discard it. */ | |
1898 | if (item->per_cu->queued) | |
1899 | { | |
1900 | if (item->per_cu->cu != NULL) | |
1901 | free_one_cached_comp_unit (item->per_cu); | |
1902 | item->per_cu->queued = 0; | |
1903 | } | |
1904 | ||
1905 | last = item; | |
1906 | item = item->next; | |
1907 | xfree (last); | |
1908 | } | |
1909 | ||
1910 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
1911 | } | |
1912 | }; | |
1913 | ||
d721ba37 PA |
1914 | /* The return type of find_file_and_directory. Note, the enclosed |
1915 | string pointers are only valid while this object is valid. */ | |
1916 | ||
1917 | struct file_and_directory | |
1918 | { | |
1919 | /* The filename. This is never NULL. */ | |
1920 | const char *name; | |
1921 | ||
1922 | /* The compilation directory. NULL if not known. If we needed to | |
1923 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1924 | points directly to the DW_AT_comp_dir string attribute owned by | |
1925 | the obstack that owns the DIE. */ | |
1926 | const char *comp_dir; | |
1927 | ||
1928 | /* If we needed to build a new string for comp_dir, this is what | |
1929 | owns the storage. */ | |
1930 | std::string comp_dir_storage; | |
1931 | }; | |
1932 | ||
1933 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1934 | struct dwarf2_cu *cu); | |
9291a0cd TT |
1935 | |
1936 | static char *file_full_name (int file, struct line_header *lh, | |
1937 | const char *comp_dir); | |
1938 | ||
43988095 JK |
1939 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
1940 | enum class rcuh_kind { COMPILE, TYPE }; | |
1941 | ||
d521ce57 | 1942 | static const gdb_byte *read_and_check_comp_unit_head |
ed2dc618 SM |
1943 | (struct dwarf2_per_objfile* dwarf2_per_objfile, |
1944 | struct comp_unit_head *header, | |
36586728 | 1945 | struct dwarf2_section_info *section, |
d521ce57 | 1946 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 1947 | rcuh_kind section_kind); |
36586728 | 1948 | |
fd820528 | 1949 | static void init_cutu_and_read_dies |
f4dc4d17 | 1950 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
58f0c718 | 1951 | int use_existing_cu, int keep, bool skip_partial, |
3019eac3 DE |
1952 | die_reader_func_ftype *die_reader_func, void *data); |
1953 | ||
dee91e82 DE |
1954 | static void init_cutu_and_read_dies_simple |
1955 | (struct dwarf2_per_cu_data *this_cu, | |
1956 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1957 | |
673bfd45 | 1958 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1959 | |
3019eac3 DE |
1960 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1961 | ||
57d63ce2 | 1962 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1963 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1964 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1965 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1966 | |
ed2dc618 SM |
1967 | static struct dwp_file *get_dwp_file |
1968 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1969 | |
3019eac3 | 1970 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1971 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1972 | |
1973 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1974 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1975 | |
89e63ee4 DE |
1976 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1977 | ||
263db9a1 | 1978 | static void free_dwo_file (struct dwo_file *); |
3019eac3 | 1979 | |
263db9a1 TT |
1980 | /* A unique_ptr helper to free a dwo_file. */ |
1981 | ||
1982 | struct dwo_file_deleter | |
ed2dc618 | 1983 | { |
263db9a1 TT |
1984 | void operator() (struct dwo_file *df) const |
1985 | { | |
1986 | free_dwo_file (df); | |
1987 | } | |
ed2dc618 SM |
1988 | }; |
1989 | ||
263db9a1 TT |
1990 | /* A unique pointer to a dwo_file. */ |
1991 | ||
1992 | typedef std::unique_ptr<struct dwo_file, dwo_file_deleter> dwo_file_up; | |
1993 | ||
ed2dc618 | 1994 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 1995 | |
1b80a9fa | 1996 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1997 | |
1998 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1999 | \f |
2000 | /* Various complaints about symbol reading that don't abort the process. */ | |
2001 | ||
2002 | static void | |
2003 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2004 | { | |
b98664d3 | 2005 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
2006 | } |
2007 | ||
2008 | static void | |
2009 | dwarf2_debug_line_missing_file_complaint (void) | |
2010 | { | |
b98664d3 | 2011 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
2012 | } |
2013 | ||
2014 | static void | |
2015 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2016 | { | |
b98664d3 | 2017 | complaint (_(".debug_line section has line " |
4390d890 DE |
2018 | "program sequence without an end")); |
2019 | } | |
2020 | ||
2021 | static void | |
2022 | dwarf2_complex_location_expr_complaint (void) | |
2023 | { | |
b98664d3 | 2024 | complaint (_("location expression too complex")); |
4390d890 DE |
2025 | } |
2026 | ||
2027 | static void | |
2028 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2029 | int arg3) | |
2030 | { | |
b98664d3 | 2031 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
2032 | arg1, arg2, arg3); |
2033 | } | |
2034 | ||
2035 | static void | |
2036 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2037 | { | |
b98664d3 | 2038 | complaint (_("debug info runs off end of %s section" |
4390d890 | 2039 | " [in module %s]"), |
a32a8923 DE |
2040 | get_section_name (section), |
2041 | get_section_file_name (section)); | |
4390d890 | 2042 | } |
1b80a9fa | 2043 | |
4390d890 DE |
2044 | static void |
2045 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2046 | { | |
b98664d3 | 2047 | complaint (_("macro debug info contains a " |
4390d890 DE |
2048 | "malformed macro definition:\n`%s'"), |
2049 | arg1); | |
2050 | } | |
2051 | ||
2052 | static void | |
2053 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2054 | { | |
b98664d3 | 2055 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
2056 | arg1, arg2); |
2057 | } | |
527f3840 JK |
2058 | |
2059 | /* Hash function for line_header_hash. */ | |
2060 | ||
2061 | static hashval_t | |
2062 | line_header_hash (const struct line_header *ofs) | |
2063 | { | |
9c541725 | 2064 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2065 | } |
2066 | ||
2067 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2068 | ||
2069 | static hashval_t | |
2070 | line_header_hash_voidp (const void *item) | |
2071 | { | |
9a3c8263 | 2072 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2073 | |
2074 | return line_header_hash (ofs); | |
2075 | } | |
2076 | ||
2077 | /* Equality function for line_header_hash. */ | |
2078 | ||
2079 | static int | |
2080 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2081 | { | |
9a3c8263 SM |
2082 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2083 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2084 | |
9c541725 | 2085 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2086 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2087 | } | |
2088 | ||
4390d890 | 2089 | \f |
9291a0cd | 2090 | |
31aa7e4e JB |
2091 | /* Read the given attribute value as an address, taking the attribute's |
2092 | form into account. */ | |
2093 | ||
2094 | static CORE_ADDR | |
2095 | attr_value_as_address (struct attribute *attr) | |
2096 | { | |
2097 | CORE_ADDR addr; | |
2098 | ||
2099 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2100 | { | |
2101 | /* Aside from a few clearly defined exceptions, attributes that | |
2102 | contain an address must always be in DW_FORM_addr form. | |
2103 | Unfortunately, some compilers happen to be violating this | |
2104 | requirement by encoding addresses using other forms, such | |
2105 | as DW_FORM_data4 for example. For those broken compilers, | |
2106 | we try to do our best, without any guarantee of success, | |
2107 | to interpret the address correctly. It would also be nice | |
2108 | to generate a complaint, but that would require us to maintain | |
2109 | a list of legitimate cases where a non-address form is allowed, | |
2110 | as well as update callers to pass in at least the CU's DWARF | |
2111 | version. This is more overhead than what we're willing to | |
2112 | expand for a pretty rare case. */ | |
2113 | addr = DW_UNSND (attr); | |
2114 | } | |
2115 | else | |
2116 | addr = DW_ADDR (attr); | |
2117 | ||
2118 | return addr; | |
2119 | } | |
2120 | ||
330cdd98 PA |
2121 | /* See declaration. */ |
2122 | ||
2123 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2124 | const dwarf2_debug_sections *names) | |
2125 | : objfile (objfile_) | |
2126 | { | |
2127 | if (names == NULL) | |
2128 | names = &dwarf2_elf_names; | |
2129 | ||
2130 | bfd *obfd = objfile->obfd; | |
2131 | ||
2132 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2133 | locate_sections (obfd, sec, *names); | |
2134 | } | |
2135 | ||
fc8e7e75 SM |
2136 | static void free_dwo_files (htab_t dwo_files, struct objfile *objfile); |
2137 | ||
330cdd98 PA |
2138 | dwarf2_per_objfile::~dwarf2_per_objfile () |
2139 | { | |
2140 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2141 | free_cached_comp_units (); | |
2142 | ||
2143 | if (quick_file_names_table) | |
2144 | htab_delete (quick_file_names_table); | |
2145 | ||
2146 | if (line_header_hash) | |
2147 | htab_delete (line_header_hash); | |
2148 | ||
b76e467d SM |
2149 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
2150 | VEC_free (dwarf2_per_cu_ptr, per_cu->imported_symtabs); | |
fc8e7e75 | 2151 | |
b2bdb8cf SM |
2152 | for (signatured_type *sig_type : all_type_units) |
2153 | VEC_free (dwarf2_per_cu_ptr, sig_type->per_cu.imported_symtabs); | |
fc8e7e75 SM |
2154 | |
2155 | VEC_free (dwarf2_section_info_def, types); | |
2156 | ||
2157 | if (dwo_files != NULL) | |
2158 | free_dwo_files (dwo_files, objfile); | |
fc8e7e75 | 2159 | |
330cdd98 PA |
2160 | /* Everything else should be on the objfile obstack. */ |
2161 | } | |
2162 | ||
2163 | /* See declaration. */ | |
2164 | ||
2165 | void | |
2166 | dwarf2_per_objfile::free_cached_comp_units () | |
2167 | { | |
2168 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2169 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2170 | while (per_cu != NULL) | |
2171 | { | |
2172 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2173 | ||
fcd3b13d | 2174 | delete per_cu->cu; |
330cdd98 PA |
2175 | *last_chain = next_cu; |
2176 | per_cu = next_cu; | |
2177 | } | |
2178 | } | |
2179 | ||
11ed8cad TT |
2180 | /* A helper class that calls free_cached_comp_units on |
2181 | destruction. */ | |
2182 | ||
2183 | class free_cached_comp_units | |
2184 | { | |
2185 | public: | |
2186 | ||
2187 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
2188 | : m_per_objfile (per_objfile) | |
2189 | { | |
2190 | } | |
2191 | ||
2192 | ~free_cached_comp_units () | |
2193 | { | |
2194 | m_per_objfile->free_cached_comp_units (); | |
2195 | } | |
2196 | ||
2197 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
2198 | ||
2199 | private: | |
2200 | ||
2201 | dwarf2_per_objfile *m_per_objfile; | |
2202 | }; | |
2203 | ||
c906108c | 2204 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2205 | information and return true if we have enough to do something. |
2206 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2207 | ELF names are used. */ | |
c906108c SS |
2208 | |
2209 | int | |
251d32d9 TG |
2210 | dwarf2_has_info (struct objfile *objfile, |
2211 | const struct dwarf2_debug_sections *names) | |
c906108c | 2212 | { |
97cbe998 SDJ |
2213 | if (objfile->flags & OBJF_READNEVER) |
2214 | return 0; | |
2215 | ||
ed2dc618 SM |
2216 | struct dwarf2_per_objfile *dwarf2_per_objfile |
2217 | = get_dwarf2_per_objfile (objfile); | |
2218 | ||
2219 | if (dwarf2_per_objfile == NULL) | |
be391dca TT |
2220 | { |
2221 | /* Initialize per-objfile state. */ | |
fd90ace4 YQ |
2222 | dwarf2_per_objfile |
2223 | = new (&objfile->objfile_obstack) struct dwarf2_per_objfile (objfile, | |
2224 | names); | |
ed2dc618 | 2225 | set_dwarf2_per_objfile (objfile, dwarf2_per_objfile); |
be391dca | 2226 | } |
73869dc2 | 2227 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2228 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2229 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2230 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2231 | } |
2232 | ||
2233 | /* Return the containing section of virtual section SECTION. */ | |
2234 | ||
2235 | static struct dwarf2_section_info * | |
2236 | get_containing_section (const struct dwarf2_section_info *section) | |
2237 | { | |
2238 | gdb_assert (section->is_virtual); | |
2239 | return section->s.containing_section; | |
c906108c SS |
2240 | } |
2241 | ||
a32a8923 DE |
2242 | /* Return the bfd owner of SECTION. */ |
2243 | ||
2244 | static struct bfd * | |
2245 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2246 | { | |
73869dc2 DE |
2247 | if (section->is_virtual) |
2248 | { | |
2249 | section = get_containing_section (section); | |
2250 | gdb_assert (!section->is_virtual); | |
2251 | } | |
049412e3 | 2252 | return section->s.section->owner; |
a32a8923 DE |
2253 | } |
2254 | ||
2255 | /* Return the bfd section of SECTION. | |
2256 | Returns NULL if the section is not present. */ | |
2257 | ||
2258 | static asection * | |
2259 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2260 | { | |
73869dc2 DE |
2261 | if (section->is_virtual) |
2262 | { | |
2263 | section = get_containing_section (section); | |
2264 | gdb_assert (!section->is_virtual); | |
2265 | } | |
049412e3 | 2266 | return section->s.section; |
a32a8923 DE |
2267 | } |
2268 | ||
2269 | /* Return the name of SECTION. */ | |
2270 | ||
2271 | static const char * | |
2272 | get_section_name (const struct dwarf2_section_info *section) | |
2273 | { | |
2274 | asection *sectp = get_section_bfd_section (section); | |
2275 | ||
2276 | gdb_assert (sectp != NULL); | |
2277 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2278 | } | |
2279 | ||
2280 | /* Return the name of the file SECTION is in. */ | |
2281 | ||
2282 | static const char * | |
2283 | get_section_file_name (const struct dwarf2_section_info *section) | |
2284 | { | |
2285 | bfd *abfd = get_section_bfd_owner (section); | |
2286 | ||
2287 | return bfd_get_filename (abfd); | |
2288 | } | |
2289 | ||
2290 | /* Return the id of SECTION. | |
2291 | Returns 0 if SECTION doesn't exist. */ | |
2292 | ||
2293 | static int | |
2294 | get_section_id (const struct dwarf2_section_info *section) | |
2295 | { | |
2296 | asection *sectp = get_section_bfd_section (section); | |
2297 | ||
2298 | if (sectp == NULL) | |
2299 | return 0; | |
2300 | return sectp->id; | |
2301 | } | |
2302 | ||
2303 | /* Return the flags of SECTION. | |
73869dc2 | 2304 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2305 | |
2306 | static int | |
2307 | get_section_flags (const struct dwarf2_section_info *section) | |
2308 | { | |
2309 | asection *sectp = get_section_bfd_section (section); | |
2310 | ||
2311 | gdb_assert (sectp != NULL); | |
2312 | return bfd_get_section_flags (sectp->owner, sectp); | |
2313 | } | |
2314 | ||
251d32d9 TG |
2315 | /* When loading sections, we look either for uncompressed section or for |
2316 | compressed section names. */ | |
233a11ab CS |
2317 | |
2318 | static int | |
251d32d9 TG |
2319 | section_is_p (const char *section_name, |
2320 | const struct dwarf2_section_names *names) | |
233a11ab | 2321 | { |
251d32d9 TG |
2322 | if (names->normal != NULL |
2323 | && strcmp (section_name, names->normal) == 0) | |
2324 | return 1; | |
2325 | if (names->compressed != NULL | |
2326 | && strcmp (section_name, names->compressed) == 0) | |
2327 | return 1; | |
2328 | return 0; | |
233a11ab CS |
2329 | } |
2330 | ||
330cdd98 | 2331 | /* See declaration. */ |
c906108c | 2332 | |
330cdd98 PA |
2333 | void |
2334 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2335 | const dwarf2_debug_sections &names) | |
c906108c | 2336 | { |
dc7650b8 | 2337 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2338 | |
dc7650b8 JK |
2339 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2340 | { | |
2341 | } | |
330cdd98 | 2342 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2343 | { |
330cdd98 PA |
2344 | this->info.s.section = sectp; |
2345 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2346 | } |
330cdd98 | 2347 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2348 | { |
330cdd98 PA |
2349 | this->abbrev.s.section = sectp; |
2350 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2351 | } |
330cdd98 | 2352 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2353 | { |
330cdd98 PA |
2354 | this->line.s.section = sectp; |
2355 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2356 | } |
330cdd98 | 2357 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2358 | { |
330cdd98 PA |
2359 | this->loc.s.section = sectp; |
2360 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2361 | } |
330cdd98 | 2362 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2363 | { |
330cdd98 PA |
2364 | this->loclists.s.section = sectp; |
2365 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2366 | } |
330cdd98 | 2367 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2368 | { |
330cdd98 PA |
2369 | this->macinfo.s.section = sectp; |
2370 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2371 | } |
330cdd98 | 2372 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2373 | { |
330cdd98 PA |
2374 | this->macro.s.section = sectp; |
2375 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2376 | } |
330cdd98 | 2377 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2378 | { |
330cdd98 PA |
2379 | this->str.s.section = sectp; |
2380 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2381 | } |
330cdd98 | 2382 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2383 | { |
330cdd98 PA |
2384 | this->line_str.s.section = sectp; |
2385 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2386 | } |
330cdd98 | 2387 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2388 | { |
330cdd98 PA |
2389 | this->addr.s.section = sectp; |
2390 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2391 | } |
330cdd98 | 2392 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2393 | { |
330cdd98 PA |
2394 | this->frame.s.section = sectp; |
2395 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2396 | } |
330cdd98 | 2397 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2398 | { |
330cdd98 PA |
2399 | this->eh_frame.s.section = sectp; |
2400 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2401 | } |
330cdd98 | 2402 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2403 | { |
330cdd98 PA |
2404 | this->ranges.s.section = sectp; |
2405 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2406 | } |
330cdd98 | 2407 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2408 | { |
330cdd98 PA |
2409 | this->rnglists.s.section = sectp; |
2410 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2411 | } |
330cdd98 | 2412 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2413 | { |
8b70b953 TT |
2414 | struct dwarf2_section_info type_section; |
2415 | ||
2416 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2417 | type_section.s.section = sectp; |
8b70b953 TT |
2418 | type_section.size = bfd_get_section_size (sectp); |
2419 | ||
330cdd98 | 2420 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2421 | &type_section); |
348e048f | 2422 | } |
330cdd98 | 2423 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2424 | { |
330cdd98 PA |
2425 | this->gdb_index.s.section = sectp; |
2426 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2427 | } |
927aa2e7 JK |
2428 | else if (section_is_p (sectp->name, &names.debug_names)) |
2429 | { | |
2430 | this->debug_names.s.section = sectp; | |
2431 | this->debug_names.size = bfd_get_section_size (sectp); | |
2432 | } | |
2433 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2434 | { | |
2435 | this->debug_aranges.s.section = sectp; | |
2436 | this->debug_aranges.size = bfd_get_section_size (sectp); | |
2437 | } | |
dce234bc | 2438 | |
b4e1fd61 | 2439 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2440 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2441 | this->has_section_at_zero = true; |
c906108c SS |
2442 | } |
2443 | ||
fceca515 DE |
2444 | /* A helper function that decides whether a section is empty, |
2445 | or not present. */ | |
9e0ac564 TT |
2446 | |
2447 | static int | |
19ac8c2e | 2448 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2449 | { |
73869dc2 DE |
2450 | if (section->is_virtual) |
2451 | return section->size == 0; | |
049412e3 | 2452 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2453 | } |
2454 | ||
cd4fb1b2 | 2455 | /* See dwarf2read.h. */ |
c906108c | 2456 | |
cd4fb1b2 SM |
2457 | void |
2458 | dwarf2_read_section (struct objfile *objfile, dwarf2_section_info *info) | |
c906108c | 2459 | { |
a32a8923 | 2460 | asection *sectp; |
3019eac3 | 2461 | bfd *abfd; |
dce234bc | 2462 | gdb_byte *buf, *retbuf; |
c906108c | 2463 | |
be391dca TT |
2464 | if (info->readin) |
2465 | return; | |
dce234bc | 2466 | info->buffer = NULL; |
be391dca | 2467 | info->readin = 1; |
188dd5d6 | 2468 | |
9e0ac564 | 2469 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2470 | return; |
c906108c | 2471 | |
a32a8923 | 2472 | sectp = get_section_bfd_section (info); |
3019eac3 | 2473 | |
73869dc2 DE |
2474 | /* If this is a virtual section we need to read in the real one first. */ |
2475 | if (info->is_virtual) | |
2476 | { | |
2477 | struct dwarf2_section_info *containing_section = | |
2478 | get_containing_section (info); | |
2479 | ||
2480 | gdb_assert (sectp != NULL); | |
2481 | if ((sectp->flags & SEC_RELOC) != 0) | |
2482 | { | |
2483 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2484 | " supported in section %s [in module %s]"), | |
2485 | get_section_name (info), get_section_file_name (info)); | |
2486 | } | |
2487 | dwarf2_read_section (objfile, containing_section); | |
2488 | /* Other code should have already caught virtual sections that don't | |
2489 | fit. */ | |
2490 | gdb_assert (info->virtual_offset + info->size | |
2491 | <= containing_section->size); | |
2492 | /* If the real section is empty or there was a problem reading the | |
2493 | section we shouldn't get here. */ | |
2494 | gdb_assert (containing_section->buffer != NULL); | |
2495 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2496 | return; | |
2497 | } | |
2498 | ||
4bf44c1c TT |
2499 | /* If the section has relocations, we must read it ourselves. |
2500 | Otherwise we attach it to the BFD. */ | |
2501 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2502 | { |
d521ce57 | 2503 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2504 | return; |
dce234bc | 2505 | } |
dce234bc | 2506 | |
224c3ddb | 2507 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2508 | info->buffer = buf; |
dce234bc PP |
2509 | |
2510 | /* When debugging .o files, we may need to apply relocations; see | |
2511 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2512 | We never compress sections in .o files, so we only need to | |
2513 | try this when the section is not compressed. */ | |
ac8035ab | 2514 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2515 | if (retbuf != NULL) |
2516 | { | |
2517 | info->buffer = retbuf; | |
2518 | return; | |
2519 | } | |
2520 | ||
a32a8923 DE |
2521 | abfd = get_section_bfd_owner (info); |
2522 | gdb_assert (abfd != NULL); | |
2523 | ||
dce234bc PP |
2524 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2525 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2526 | { |
2527 | error (_("Dwarf Error: Can't read DWARF data" | |
2528 | " in section %s [in module %s]"), | |
2529 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2530 | } | |
dce234bc PP |
2531 | } |
2532 | ||
9e0ac564 TT |
2533 | /* A helper function that returns the size of a section in a safe way. |
2534 | If you are positive that the section has been read before using the | |
2535 | size, then it is safe to refer to the dwarf2_section_info object's | |
2536 | "size" field directly. In other cases, you must call this | |
2537 | function, because for compressed sections the size field is not set | |
2538 | correctly until the section has been read. */ | |
2539 | ||
2540 | static bfd_size_type | |
2541 | dwarf2_section_size (struct objfile *objfile, | |
2542 | struct dwarf2_section_info *info) | |
2543 | { | |
2544 | if (!info->readin) | |
2545 | dwarf2_read_section (objfile, info); | |
2546 | return info->size; | |
2547 | } | |
2548 | ||
dce234bc | 2549 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2550 | SECTION_NAME. */ |
af34e669 | 2551 | |
dce234bc | 2552 | void |
3017a003 TG |
2553 | dwarf2_get_section_info (struct objfile *objfile, |
2554 | enum dwarf2_section_enum sect, | |
d521ce57 | 2555 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2556 | bfd_size_type *sizep) |
2557 | { | |
2558 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2559 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2560 | dwarf2_objfile_data_key); | |
dce234bc | 2561 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2562 | |
2563 | /* We may see an objfile without any DWARF, in which case we just | |
2564 | return nothing. */ | |
2565 | if (data == NULL) | |
2566 | { | |
2567 | *sectp = NULL; | |
2568 | *bufp = NULL; | |
2569 | *sizep = 0; | |
2570 | return; | |
2571 | } | |
3017a003 TG |
2572 | switch (sect) |
2573 | { | |
2574 | case DWARF2_DEBUG_FRAME: | |
2575 | info = &data->frame; | |
2576 | break; | |
2577 | case DWARF2_EH_FRAME: | |
2578 | info = &data->eh_frame; | |
2579 | break; | |
2580 | default: | |
2581 | gdb_assert_not_reached ("unexpected section"); | |
2582 | } | |
dce234bc | 2583 | |
9e0ac564 | 2584 | dwarf2_read_section (objfile, info); |
dce234bc | 2585 | |
a32a8923 | 2586 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2587 | *bufp = info->buffer; |
2588 | *sizep = info->size; | |
2589 | } | |
2590 | ||
36586728 TT |
2591 | /* A helper function to find the sections for a .dwz file. */ |
2592 | ||
2593 | static void | |
2594 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2595 | { | |
9a3c8263 | 2596 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2597 | |
2598 | /* Note that we only support the standard ELF names, because .dwz | |
2599 | is ELF-only (at the time of writing). */ | |
2600 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2601 | { | |
049412e3 | 2602 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2603 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2604 | } | |
2605 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2606 | { | |
049412e3 | 2607 | dwz_file->info.s.section = sectp; |
36586728 TT |
2608 | dwz_file->info.size = bfd_get_section_size (sectp); |
2609 | } | |
2610 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2611 | { | |
049412e3 | 2612 | dwz_file->str.s.section = sectp; |
36586728 TT |
2613 | dwz_file->str.size = bfd_get_section_size (sectp); |
2614 | } | |
2615 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2616 | { | |
049412e3 | 2617 | dwz_file->line.s.section = sectp; |
36586728 TT |
2618 | dwz_file->line.size = bfd_get_section_size (sectp); |
2619 | } | |
2620 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2621 | { | |
049412e3 | 2622 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2623 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2624 | } | |
2ec9a5e0 TT |
2625 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2626 | { | |
049412e3 | 2627 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2628 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2629 | } | |
927aa2e7 JK |
2630 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2631 | { | |
2632 | dwz_file->debug_names.s.section = sectp; | |
2633 | dwz_file->debug_names.size = bfd_get_section_size (sectp); | |
2634 | } | |
36586728 TT |
2635 | } |
2636 | ||
4db1a1dc TT |
2637 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2638 | there is no .gnu_debugaltlink section in the file. Error if there | |
2639 | is such a section but the file cannot be found. */ | |
36586728 TT |
2640 | |
2641 | static struct dwz_file * | |
ed2dc618 | 2642 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2643 | { |
36586728 | 2644 | const char *filename; |
acd13123 | 2645 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2646 | size_t buildid_len; |
2647 | bfd_byte *buildid; | |
36586728 TT |
2648 | |
2649 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2650 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2651 | |
4db1a1dc | 2652 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2653 | gdb::unique_xmalloc_ptr<char> data |
2654 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2655 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2656 | if (data == NULL) |
2657 | { | |
2658 | if (bfd_get_error () == bfd_error_no_error) | |
2659 | return NULL; | |
2660 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2661 | bfd_errmsg (bfd_get_error ())); | |
2662 | } | |
791afaa2 TT |
2663 | |
2664 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2665 | |
acd13123 TT |
2666 | buildid_len = (size_t) buildid_len_arg; |
2667 | ||
791afaa2 | 2668 | filename = data.get (); |
d721ba37 PA |
2669 | |
2670 | std::string abs_storage; | |
36586728 TT |
2671 | if (!IS_ABSOLUTE_PATH (filename)) |
2672 | { | |
14278e1f TT |
2673 | gdb::unique_xmalloc_ptr<char> abs |
2674 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2675 | |
14278e1f | 2676 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2677 | filename = abs_storage.c_str (); |
36586728 TT |
2678 | } |
2679 | ||
dc294be5 TT |
2680 | /* First try the file name given in the section. If that doesn't |
2681 | work, try to use the build-id instead. */ | |
192b62ce | 2682 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2683 | if (dwz_bfd != NULL) |
36586728 | 2684 | { |
192b62ce TT |
2685 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2686 | dwz_bfd.release (); | |
36586728 TT |
2687 | } |
2688 | ||
dc294be5 TT |
2689 | if (dwz_bfd == NULL) |
2690 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2691 | ||
2692 | if (dwz_bfd == NULL) | |
2693 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2694 | objfile_name (dwarf2_per_objfile->objfile)); | |
2695 | ||
7ff8cb8c TT |
2696 | std::unique_ptr<struct dwz_file> result |
2697 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2698 | |
7ff8cb8c TT |
2699 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2700 | result.get ()); | |
36586728 | 2701 | |
7ff8cb8c TT |
2702 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2703 | result->dwz_bfd.get ()); | |
2704 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2705 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2706 | } |
9291a0cd | 2707 | \f |
7b9f3c50 DE |
2708 | /* DWARF quick_symbols_functions support. */ |
2709 | ||
2710 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2711 | unique line tables, so we maintain a separate table of all .debug_line | |
2712 | derived entries to support the sharing. | |
2713 | All the quick functions need is the list of file names. We discard the | |
2714 | line_header when we're done and don't need to record it here. */ | |
2715 | struct quick_file_names | |
2716 | { | |
094b34ac DE |
2717 | /* The data used to construct the hash key. */ |
2718 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2719 | |
2720 | /* The number of entries in file_names, real_names. */ | |
2721 | unsigned int num_file_names; | |
2722 | ||
2723 | /* The file names from the line table, after being run through | |
2724 | file_full_name. */ | |
2725 | const char **file_names; | |
2726 | ||
2727 | /* The file names from the line table after being run through | |
2728 | gdb_realpath. These are computed lazily. */ | |
2729 | const char **real_names; | |
2730 | }; | |
2731 | ||
2732 | /* When using the index (and thus not using psymtabs), each CU has an | |
2733 | object of this type. This is used to hold information needed by | |
2734 | the various "quick" methods. */ | |
2735 | struct dwarf2_per_cu_quick_data | |
2736 | { | |
2737 | /* The file table. This can be NULL if there was no file table | |
2738 | or it's currently not read in. | |
2739 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2740 | struct quick_file_names *file_names; | |
2741 | ||
2742 | /* The corresponding symbol table. This is NULL if symbols for this | |
2743 | CU have not yet been read. */ | |
43f3e411 | 2744 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2745 | |
2746 | /* A temporary mark bit used when iterating over all CUs in | |
2747 | expand_symtabs_matching. */ | |
2748 | unsigned int mark : 1; | |
2749 | ||
2750 | /* True if we've tried to read the file table and found there isn't one. | |
2751 | There will be no point in trying to read it again next time. */ | |
2752 | unsigned int no_file_data : 1; | |
2753 | }; | |
2754 | ||
094b34ac DE |
2755 | /* Utility hash function for a stmt_list_hash. */ |
2756 | ||
2757 | static hashval_t | |
2758 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2759 | { | |
2760 | hashval_t v = 0; | |
2761 | ||
2762 | if (stmt_list_hash->dwo_unit != NULL) | |
2763 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2764 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2765 | return v; |
2766 | } | |
2767 | ||
2768 | /* Utility equality function for a stmt_list_hash. */ | |
2769 | ||
2770 | static int | |
2771 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2772 | const struct stmt_list_hash *rhs) | |
2773 | { | |
2774 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2775 | return 0; | |
2776 | if (lhs->dwo_unit != NULL | |
2777 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2778 | return 0; | |
2779 | ||
9c541725 | 2780 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2781 | } |
2782 | ||
7b9f3c50 DE |
2783 | /* Hash function for a quick_file_names. */ |
2784 | ||
2785 | static hashval_t | |
2786 | hash_file_name_entry (const void *e) | |
2787 | { | |
9a3c8263 SM |
2788 | const struct quick_file_names *file_data |
2789 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2790 | |
094b34ac | 2791 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2792 | } |
2793 | ||
2794 | /* Equality function for a quick_file_names. */ | |
2795 | ||
2796 | static int | |
2797 | eq_file_name_entry (const void *a, const void *b) | |
2798 | { | |
9a3c8263 SM |
2799 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2800 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2801 | |
094b34ac | 2802 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2803 | } |
2804 | ||
2805 | /* Delete function for a quick_file_names. */ | |
2806 | ||
2807 | static void | |
2808 | delete_file_name_entry (void *e) | |
2809 | { | |
9a3c8263 | 2810 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2811 | int i; |
2812 | ||
2813 | for (i = 0; i < file_data->num_file_names; ++i) | |
2814 | { | |
2815 | xfree ((void*) file_data->file_names[i]); | |
2816 | if (file_data->real_names) | |
2817 | xfree ((void*) file_data->real_names[i]); | |
2818 | } | |
2819 | ||
2820 | /* The space for the struct itself lives on objfile_obstack, | |
2821 | so we don't free it here. */ | |
2822 | } | |
2823 | ||
2824 | /* Create a quick_file_names hash table. */ | |
2825 | ||
2826 | static htab_t | |
2827 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2828 | { | |
2829 | return htab_create_alloc (nr_initial_entries, | |
2830 | hash_file_name_entry, eq_file_name_entry, | |
2831 | delete_file_name_entry, xcalloc, xfree); | |
2832 | } | |
9291a0cd | 2833 | |
918dd910 JK |
2834 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2835 | have to be created afterwards. You should call age_cached_comp_units after | |
2836 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2837 | ||
2838 | static void | |
58f0c718 | 2839 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2840 | { |
3019eac3 | 2841 | if (per_cu->is_debug_types) |
e5fe5e75 | 2842 | load_full_type_unit (per_cu); |
918dd910 | 2843 | else |
58f0c718 | 2844 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2845 | |
cc12ce38 DE |
2846 | if (per_cu->cu == NULL) |
2847 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2848 | |
2849 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2850 | } |
2851 | ||
a0f42c21 | 2852 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2853 | |
9291a0cd | 2854 | static void |
58f0c718 | 2855 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2856 | { |
ed2dc618 | 2857 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2858 | |
f4dc4d17 DE |
2859 | /* Skip type_unit_groups, reading the type units they contain |
2860 | is handled elsewhere. */ | |
2861 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2862 | return; | |
2863 | ||
b303c6f6 AB |
2864 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2865 | the queue. After this point we're guaranteed to leave this function | |
2866 | with the dwarf queue empty. */ | |
2867 | dwarf2_queue_guard q_guard; | |
9291a0cd | 2868 | |
95554aad | 2869 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2870 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2871 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2872 | { | |
2873 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2874 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2875 | |
2876 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2877 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2878 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2879 | if (!per_cu->is_debug_types | |
cc12ce38 | 2880 | && per_cu->cu != NULL |
89e63ee4 DE |
2881 | && per_cu->cu->dwo_unit != NULL |
2882 | && dwarf2_per_objfile->index_table != NULL | |
2883 | && dwarf2_per_objfile->index_table->version <= 7 | |
2884 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2885 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2886 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2887 | } |
9291a0cd | 2888 | |
ed2dc618 | 2889 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2890 | |
2891 | /* Age the cache, releasing compilation units that have not | |
2892 | been used recently. */ | |
ed2dc618 | 2893 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2894 | } |
2895 | ||
2896 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2897 | the objfile from which this CU came. Returns the resulting symbol | |
2898 | table. */ | |
2fdf6df6 | 2899 | |
43f3e411 | 2900 | static struct compunit_symtab * |
58f0c718 | 2901 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2902 | { |
ed2dc618 SM |
2903 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2904 | ||
95554aad | 2905 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2906 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2907 | { |
11ed8cad | 2908 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2909 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2910 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2911 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2912 | } |
f194fefb | 2913 | |
43f3e411 | 2914 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2915 | } |
2916 | ||
ff4c9fec | 2917 | /* See declaration. */ |
f4dc4d17 | 2918 | |
ff4c9fec SM |
2919 | dwarf2_per_cu_data * |
2920 | dwarf2_per_objfile::get_cutu (int index) | |
2921 | { | |
b76e467d | 2922 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2923 | { |
b76e467d | 2924 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2925 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2926 | return &this->all_type_units[index]->per_cu; |
2927 | } | |
f4dc4d17 | 2928 | |
ff4c9fec SM |
2929 | return this->all_comp_units[index]; |
2930 | } | |
f4dc4d17 | 2931 | |
ff4c9fec | 2932 | /* See declaration. */ |
2fdf6df6 | 2933 | |
ff4c9fec SM |
2934 | dwarf2_per_cu_data * |
2935 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2936 | { |
b76e467d | 2937 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2938 | |
ff4c9fec | 2939 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2940 | } |
2941 | ||
ff4c9fec | 2942 | /* See declaration. */ |
f4dc4d17 | 2943 | |
ff4c9fec SM |
2944 | signatured_type * |
2945 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2946 | { |
b2bdb8cf | 2947 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2948 | |
ff4c9fec | 2949 | return this->all_type_units[index]; |
1fd400ff TT |
2950 | } |
2951 | ||
4b514bc8 JK |
2952 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2953 | objfile_obstack, and constructed with the specified field | |
2954 | values. */ | |
2955 | ||
2956 | static dwarf2_per_cu_data * | |
ed2dc618 | 2957 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2958 | struct dwarf2_section_info *section, |
2959 | int is_dwz, | |
2960 | sect_offset sect_off, ULONGEST length) | |
2961 | { | |
ed2dc618 | 2962 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2963 | dwarf2_per_cu_data *the_cu |
2964 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2965 | struct dwarf2_per_cu_data); | |
2966 | the_cu->sect_off = sect_off; | |
2967 | the_cu->length = length; | |
e3b94546 | 2968 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2969 | the_cu->section = section; |
2970 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2971 | struct dwarf2_per_cu_quick_data); | |
2972 | the_cu->is_dwz = is_dwz; | |
2973 | return the_cu; | |
2974 | } | |
2975 | ||
2ec9a5e0 TT |
2976 | /* A helper for create_cus_from_index that handles a given list of |
2977 | CUs. */ | |
2fdf6df6 | 2978 | |
74a0d9f6 | 2979 | static void |
12359b5e | 2980 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2981 | const gdb_byte *cu_list, offset_type n_elements, |
2982 | struct dwarf2_section_info *section, | |
b76e467d | 2983 | int is_dwz) |
9291a0cd | 2984 | { |
12359b5e | 2985 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2986 | { |
74a0d9f6 | 2987 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2988 | |
2989 | sect_offset sect_off | |
2990 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2991 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2992 | cu_list += 2 * 8; |
2993 | ||
b76e467d | 2994 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2995 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2996 | sect_off, length); | |
b76e467d | 2997 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2998 | } |
9291a0cd TT |
2999 | } |
3000 | ||
2ec9a5e0 | 3001 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3002 | the CU objects for this objfile. */ |
2ec9a5e0 | 3003 | |
74a0d9f6 | 3004 | static void |
12359b5e | 3005 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
3006 | const gdb_byte *cu_list, offset_type cu_list_elements, |
3007 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3008 | { | |
b76e467d SM |
3009 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
3010 | dwarf2_per_objfile->all_comp_units.reserve | |
3011 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 3012 | |
12359b5e | 3013 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 3014 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
3015 | |
3016 | if (dwz_elements == 0) | |
74a0d9f6 | 3017 | return; |
2ec9a5e0 | 3018 | |
12359b5e SM |
3019 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
3020 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 3021 | &dwz->info, 1); |
2ec9a5e0 TT |
3022 | } |
3023 | ||
1fd400ff | 3024 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3025 | |
74a0d9f6 | 3026 | static void |
12359b5e SM |
3027 | create_signatured_type_table_from_index |
3028 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3029 | struct dwarf2_section_info *section, | |
3030 | const gdb_byte *bytes, | |
3031 | offset_type elements) | |
1fd400ff | 3032 | { |
12359b5e | 3033 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 3034 | |
b2bdb8cf SM |
3035 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3036 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 3037 | |
12359b5e | 3038 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff | 3039 | |
12359b5e | 3040 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 3041 | { |
52dc124a | 3042 | struct signatured_type *sig_type; |
9c541725 | 3043 | ULONGEST signature; |
1fd400ff | 3044 | void **slot; |
9c541725 | 3045 | cu_offset type_offset_in_tu; |
1fd400ff | 3046 | |
74a0d9f6 | 3047 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3048 | sect_offset sect_off |
3049 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3050 | type_offset_in_tu | |
3051 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3052 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3053 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3054 | bytes += 3 * 8; | |
3055 | ||
52dc124a | 3056 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3057 | struct signatured_type); |
52dc124a | 3058 | sig_type->signature = signature; |
9c541725 | 3059 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3060 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3061 | sig_type->per_cu.section = section; |
9c541725 | 3062 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 3063 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 3064 | sig_type->per_cu.v.quick |
1fd400ff TT |
3065 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3066 | struct dwarf2_per_cu_quick_data); | |
3067 | ||
52dc124a DE |
3068 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3069 | *slot = sig_type; | |
1fd400ff | 3070 | |
b2bdb8cf | 3071 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
3072 | } |
3073 | ||
673bfd45 | 3074 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3075 | } |
3076 | ||
927aa2e7 JK |
3077 | /* Create the signatured type hash table from .debug_names. */ |
3078 | ||
3079 | static void | |
3080 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 3081 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3082 | const mapped_debug_names &map, |
3083 | struct dwarf2_section_info *section, | |
3084 | struct dwarf2_section_info *abbrev_section) | |
3085 | { | |
ed2dc618 SM |
3086 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3087 | ||
927aa2e7 JK |
3088 | dwarf2_read_section (objfile, section); |
3089 | dwarf2_read_section (objfile, abbrev_section); | |
3090 | ||
b2bdb8cf SM |
3091 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3092 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 JK |
3093 | |
3094 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); | |
3095 | ||
3096 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
3097 | { | |
3098 | struct signatured_type *sig_type; | |
927aa2e7 | 3099 | void **slot; |
927aa2e7 JK |
3100 | |
3101 | sect_offset sect_off | |
3102 | = (sect_offset) (extract_unsigned_integer | |
3103 | (map.tu_table_reordered + i * map.offset_size, | |
3104 | map.offset_size, | |
3105 | map.dwarf5_byte_order)); | |
3106 | ||
3107 | comp_unit_head cu_header; | |
ed2dc618 SM |
3108 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
3109 | abbrev_section, | |
927aa2e7 JK |
3110 | section->buffer + to_underlying (sect_off), |
3111 | rcuh_kind::TYPE); | |
3112 | ||
3113 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3114 | struct signatured_type); | |
3115 | sig_type->signature = cu_header.signature; | |
3116 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
3117 | sig_type->per_cu.is_debug_types = 1; | |
3118 | sig_type->per_cu.section = section; | |
3119 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 3120 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
3121 | sig_type->per_cu.v.quick |
3122 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3123 | struct dwarf2_per_cu_quick_data); | |
3124 | ||
3125 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); | |
3126 | *slot = sig_type; | |
3127 | ||
b2bdb8cf | 3128 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
3129 | } |
3130 | ||
3131 | dwarf2_per_objfile->signatured_types = sig_types_hash; | |
3132 | } | |
3133 | ||
9291a0cd TT |
3134 | /* Read the address map data from the mapped index, and use it to |
3135 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3136 | |
9291a0cd | 3137 | static void |
ed2dc618 SM |
3138 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
3139 | struct mapped_index *index) | |
9291a0cd | 3140 | { |
ed2dc618 | 3141 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 3142 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3143 | const gdb_byte *iter, *end; |
9291a0cd | 3144 | struct addrmap *mutable_map; |
9291a0cd TT |
3145 | CORE_ADDR baseaddr; |
3146 | ||
8268c778 PA |
3147 | auto_obstack temp_obstack; |
3148 | ||
9291a0cd TT |
3149 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3150 | ||
f00a2de2 PA |
3151 | iter = index->address_table.data (); |
3152 | end = iter + index->address_table.size (); | |
9291a0cd TT |
3153 | |
3154 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3155 | ||
3156 | while (iter < end) | |
3157 | { | |
3158 | ULONGEST hi, lo, cu_index; | |
3159 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3160 | iter += 8; | |
3161 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3162 | iter += 8; | |
3163 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3164 | iter += 4; | |
f652bce2 | 3165 | |
24a55014 | 3166 | if (lo > hi) |
f652bce2 | 3167 | { |
b98664d3 | 3168 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 3169 | hex_string (lo), hex_string (hi)); |
24a55014 | 3170 | continue; |
f652bce2 | 3171 | } |
24a55014 | 3172 | |
b76e467d | 3173 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 3174 | { |
b98664d3 | 3175 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 3176 | (unsigned) cu_index); |
24a55014 | 3177 | continue; |
f652bce2 | 3178 | } |
24a55014 | 3179 | |
3e29f34a MR |
3180 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3181 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
ed2dc618 | 3182 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 3183 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
3184 | } |
3185 | ||
3186 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3187 | &objfile->objfile_obstack); | |
9291a0cd TT |
3188 | } |
3189 | ||
927aa2e7 JK |
3190 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
3191 | populate the objfile's psymtabs_addrmap. */ | |
3192 | ||
3193 | static void | |
ed2dc618 | 3194 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3195 | struct dwarf2_section_info *section) |
3196 | { | |
ed2dc618 | 3197 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
3198 | bfd *abfd = objfile->obfd; |
3199 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
3200 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
3201 | SECT_OFF_TEXT (objfile)); | |
3202 | ||
3203 | auto_obstack temp_obstack; | |
3204 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
3205 | ||
3206 | std::unordered_map<sect_offset, | |
3207 | dwarf2_per_cu_data *, | |
3208 | gdb::hash_enum<sect_offset>> | |
3209 | debug_info_offset_to_per_cu; | |
b76e467d | 3210 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 3211 | { |
927aa2e7 JK |
3212 | const auto insertpair |
3213 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
3214 | if (!insertpair.second) | |
3215 | { | |
3216 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
3217 | "debug_info_offset %s, ignoring .debug_aranges."), |
3218 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
3219 | return; |
3220 | } | |
3221 | } | |
3222 | ||
3223 | dwarf2_read_section (objfile, section); | |
3224 | ||
3225 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
3226 | ||
3227 | const gdb_byte *addr = section->buffer; | |
3228 | ||
3229 | while (addr < section->buffer + section->size) | |
3230 | { | |
3231 | const gdb_byte *const entry_addr = addr; | |
3232 | unsigned int bytes_read; | |
3233 | ||
3234 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
3235 | &bytes_read); | |
3236 | addr += bytes_read; | |
3237 | ||
3238 | const gdb_byte *const entry_end = addr + entry_length; | |
3239 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
3240 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
3241 | if (addr + entry_length > section->buffer + section->size) | |
3242 | { | |
3243 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3244 | "length %s exceeds section length %s, " | |
3245 | "ignoring .debug_aranges."), | |
3246 | objfile_name (objfile), entry_addr - section->buffer, | |
3247 | plongest (bytes_read + entry_length), | |
3248 | pulongest (section->size)); | |
3249 | return; | |
3250 | } | |
3251 | ||
3252 | /* The version number. */ | |
3253 | const uint16_t version = read_2_bytes (abfd, addr); | |
3254 | addr += 2; | |
3255 | if (version != 2) | |
3256 | { | |
3257 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3258 | "has unsupported version %d, ignoring .debug_aranges."), | |
3259 | objfile_name (objfile), entry_addr - section->buffer, | |
3260 | version); | |
3261 | return; | |
3262 | } | |
3263 | ||
3264 | const uint64_t debug_info_offset | |
3265 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
3266 | addr += offset_size; | |
3267 | const auto per_cu_it | |
3268 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
3269 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
3270 | { | |
3271 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3272 | "debug_info_offset %s does not exists, " | |
3273 | "ignoring .debug_aranges."), | |
3274 | objfile_name (objfile), entry_addr - section->buffer, | |
3275 | pulongest (debug_info_offset)); | |
3276 | return; | |
3277 | } | |
3278 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
3279 | ||
3280 | const uint8_t address_size = *addr++; | |
3281 | if (address_size < 1 || address_size > 8) | |
3282 | { | |
3283 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3284 | "address_size %u is invalid, ignoring .debug_aranges."), | |
3285 | objfile_name (objfile), entry_addr - section->buffer, | |
3286 | address_size); | |
3287 | return; | |
3288 | } | |
3289 | ||
3290 | const uint8_t segment_selector_size = *addr++; | |
3291 | if (segment_selector_size != 0) | |
3292 | { | |
3293 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3294 | "segment_selector_size %u is not supported, " | |
3295 | "ignoring .debug_aranges."), | |
3296 | objfile_name (objfile), entry_addr - section->buffer, | |
3297 | segment_selector_size); | |
3298 | return; | |
3299 | } | |
3300 | ||
3301 | /* Must pad to an alignment boundary that is twice the address | |
3302 | size. It is undocumented by the DWARF standard but GCC does | |
3303 | use it. */ | |
3304 | for (size_t padding = ((-(addr - section->buffer)) | |
3305 | & (2 * address_size - 1)); | |
3306 | padding > 0; padding--) | |
3307 | if (*addr++ != 0) | |
3308 | { | |
3309 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3310 | "padding is not zero, ignoring .debug_aranges."), | |
3311 | objfile_name (objfile), entry_addr - section->buffer); | |
3312 | return; | |
3313 | } | |
3314 | ||
3315 | for (;;) | |
3316 | { | |
3317 | if (addr + 2 * address_size > entry_end) | |
3318 | { | |
3319 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3320 | "address list is not properly terminated, " | |
3321 | "ignoring .debug_aranges."), | |
3322 | objfile_name (objfile), entry_addr - section->buffer); | |
3323 | return; | |
3324 | } | |
3325 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
3326 | dwarf5_byte_order); | |
3327 | addr += address_size; | |
3328 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
3329 | dwarf5_byte_order); | |
3330 | addr += address_size; | |
3331 | if (start == 0 && length == 0) | |
3332 | break; | |
3333 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
3334 | { | |
3335 | /* Symbol was eliminated due to a COMDAT group. */ | |
3336 | continue; | |
3337 | } | |
3338 | ULONGEST end = start + length; | |
3339 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr); | |
3340 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr); | |
3341 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); | |
3342 | } | |
3343 | } | |
3344 | ||
3345 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3346 | &objfile->objfile_obstack); | |
3347 | } | |
3348 | ||
9291a0cd TT |
3349 | /* Find a slot in the mapped index INDEX for the object named NAME. |
3350 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3351 | constant pool and return true. If NAME cannot be found, return |
3352 | false. */ | |
2fdf6df6 | 3353 | |
109483d9 | 3354 | static bool |
9291a0cd TT |
3355 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3356 | offset_type **vec_out) | |
3357 | { | |
0cf03b49 | 3358 | offset_type hash; |
9291a0cd | 3359 | offset_type slot, step; |
559a7a62 | 3360 | int (*cmp) (const char *, const char *); |
9291a0cd | 3361 | |
791afaa2 | 3362 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3363 | if (current_language->la_language == language_cplus |
45280282 IB |
3364 | || current_language->la_language == language_fortran |
3365 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3366 | { |
3367 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3368 | not contain any. */ | |
a8719064 | 3369 | |
72998fb3 | 3370 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3371 | { |
109483d9 | 3372 | without_params = cp_remove_params (name); |
0cf03b49 | 3373 | |
72998fb3 | 3374 | if (without_params != NULL) |
791afaa2 | 3375 | name = without_params.get (); |
0cf03b49 JK |
3376 | } |
3377 | } | |
3378 | ||
559a7a62 | 3379 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3380 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3381 | simulate our NAME being searched is also lowercased. */ |
3382 | hash = mapped_index_string_hash ((index->version == 4 | |
3383 | && case_sensitivity == case_sensitive_off | |
3384 | ? 5 : index->version), | |
3385 | name); | |
3386 | ||
f00a2de2 PA |
3387 | slot = hash & (index->symbol_table.size () - 1); |
3388 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 3389 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3390 | |
3391 | for (;;) | |
3392 | { | |
9291a0cd | 3393 | const char *str; |
f00a2de2 PA |
3394 | |
3395 | const auto &bucket = index->symbol_table[slot]; | |
3396 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 3397 | return false; |
9291a0cd | 3398 | |
f00a2de2 | 3399 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 3400 | if (!cmp (name, str)) |
9291a0cd TT |
3401 | { |
3402 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 3403 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 3404 | return true; |
9291a0cd TT |
3405 | } |
3406 | ||
f00a2de2 | 3407 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
3408 | } |
3409 | } | |
3410 | ||
2ec9a5e0 TT |
3411 | /* A helper function that reads the .gdb_index from SECTION and fills |
3412 | in MAP. FILENAME is the name of the file containing the section; | |
d33bc52e | 3413 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
3414 | ok to use deprecated sections. |
3415 | ||
3416 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3417 | out parameters that are filled in with information about the CU and | |
3418 | TU lists in the section. | |
3419 | ||
3420 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3421 | |
d33bc52e | 3422 | static bool |
7b23e087 SM |
3423 | read_gdb_index_from_section (struct objfile *objfile, |
3424 | const char *filename, | |
3425 | bool deprecated_ok, | |
3426 | struct dwarf2_section_info *section, | |
3427 | struct mapped_index *map, | |
3428 | const gdb_byte **cu_list, | |
3429 | offset_type *cu_list_elements, | |
3430 | const gdb_byte **types_list, | |
3431 | offset_type *types_list_elements) | |
9291a0cd | 3432 | { |
948f8e3d | 3433 | const gdb_byte *addr; |
2ec9a5e0 | 3434 | offset_type version; |
b3b272e1 | 3435 | offset_type *metadata; |
1fd400ff | 3436 | int i; |
9291a0cd | 3437 | |
2ec9a5e0 | 3438 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3439 | return 0; |
82430852 JK |
3440 | |
3441 | /* Older elfutils strip versions could keep the section in the main | |
3442 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3443 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3444 | return 0; |
3445 | ||
2ec9a5e0 | 3446 | dwarf2_read_section (objfile, section); |
9291a0cd | 3447 | |
2ec9a5e0 | 3448 | addr = section->buffer; |
9291a0cd | 3449 | /* Version check. */ |
1fd400ff | 3450 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3451 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3452 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3453 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3454 | indices. */ |
831adc1f | 3455 | if (version < 4) |
481860b3 GB |
3456 | { |
3457 | static int warning_printed = 0; | |
3458 | if (!warning_printed) | |
3459 | { | |
3460 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3461 | filename); |
481860b3 GB |
3462 | warning_printed = 1; |
3463 | } | |
3464 | return 0; | |
3465 | } | |
3466 | /* Index version 4 uses a different hash function than index version | |
3467 | 5 and later. | |
3468 | ||
3469 | Versions earlier than 6 did not emit psymbols for inlined | |
3470 | functions. Using these files will cause GDB not to be able to | |
3471 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3472 | indices unless the user has done |
3473 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3474 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3475 | { |
3476 | static int warning_printed = 0; | |
3477 | if (!warning_printed) | |
3478 | { | |
e615022a DE |
3479 | warning (_("\ |
3480 | Skipping deprecated .gdb_index section in %s.\n\ | |
3481 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3482 | to use the section anyway."), | |
2ec9a5e0 | 3483 | filename); |
481860b3 GB |
3484 | warning_printed = 1; |
3485 | } | |
3486 | return 0; | |
3487 | } | |
796a7ff8 | 3488 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3489 | of the TU (for symbols coming from TUs), |
3490 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3491 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3492 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3493 | These are just performance bugs, and we can't distinguish gdb-generated | |
3494 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3495 | |
481860b3 | 3496 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3497 | longer backward compatible. */ |
796a7ff8 | 3498 | if (version > 8) |
594e8718 | 3499 | return 0; |
9291a0cd | 3500 | |
559a7a62 | 3501 | map->version = version; |
9291a0cd TT |
3502 | |
3503 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3504 | |
3505 | i = 0; | |
2ec9a5e0 TT |
3506 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3507 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3508 | / 8); | |
1fd400ff TT |
3509 | ++i; |
3510 | ||
2ec9a5e0 TT |
3511 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3512 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3513 | - MAYBE_SWAP (metadata[i])) | |
3514 | / 8); | |
987d643c | 3515 | ++i; |
1fd400ff | 3516 | |
f00a2de2 PA |
3517 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
3518 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3519 | map->address_table | |
3520 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
3521 | ++i; |
3522 | ||
f00a2de2 PA |
3523 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3524 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3525 | map->symbol_table | |
3526 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3527 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3528 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3529 | |
f00a2de2 | 3530 | ++i; |
f9d83a0b | 3531 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3532 | |
2ec9a5e0 TT |
3533 | return 1; |
3534 | } | |
3535 | ||
927aa2e7 | 3536 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3537 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3538 | ||
3539 | static int | |
7b23e087 | 3540 | dwarf2_read_gdb_index (struct dwarf2_per_objfile *dwarf2_per_objfile) |
2ec9a5e0 | 3541 | { |
2ec9a5e0 TT |
3542 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3543 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3544 | struct dwz_file *dwz; |
12359b5e | 3545 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3546 | |
3063847f | 3547 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
7b23e087 SM |
3548 | if (!read_gdb_index_from_section (objfile, objfile_name (objfile), |
3549 | use_deprecated_index_sections, | |
3550 | &dwarf2_per_objfile->gdb_index, map.get (), | |
3551 | &cu_list, &cu_list_elements, | |
3552 | &types_list, &types_list_elements)) | |
2ec9a5e0 TT |
3553 | return 0; |
3554 | ||
0fefef59 | 3555 | /* Don't use the index if it's empty. */ |
3063847f | 3556 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3557 | return 0; |
3558 | ||
2ec9a5e0 TT |
3559 | /* If there is a .dwz file, read it so we can get its CU list as |
3560 | well. */ | |
ed2dc618 | 3561 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3562 | if (dwz != NULL) |
2ec9a5e0 | 3563 | { |
2ec9a5e0 TT |
3564 | struct mapped_index dwz_map; |
3565 | const gdb_byte *dwz_types_ignore; | |
3566 | offset_type dwz_types_elements_ignore; | |
3567 | ||
7b23e087 SM |
3568 | if (!read_gdb_index_from_section (objfile, |
3569 | bfd_get_filename (dwz->dwz_bfd), 1, | |
3570 | &dwz->gdb_index, &dwz_map, | |
3571 | &dwz_list, &dwz_list_elements, | |
3572 | &dwz_types_ignore, | |
3573 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3574 | { |
3575 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3576 | bfd_get_filename (dwz->dwz_bfd)); | |
3577 | return 0; | |
3578 | } | |
3579 | } | |
3580 | ||
12359b5e SM |
3581 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3582 | dwz_list, dwz_list_elements); | |
1fd400ff | 3583 | |
8b70b953 TT |
3584 | if (types_list_elements) |
3585 | { | |
3586 | struct dwarf2_section_info *section; | |
3587 | ||
3588 | /* We can only handle a single .debug_types when we have an | |
3589 | index. */ | |
3590 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3591 | return 0; | |
3592 | ||
3593 | section = VEC_index (dwarf2_section_info_def, | |
3594 | dwarf2_per_objfile->types, 0); | |
3595 | ||
12359b5e SM |
3596 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3597 | types_list, types_list_elements); | |
8b70b953 | 3598 | } |
9291a0cd | 3599 | |
3063847f | 3600 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3601 | |
3063847f | 3602 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3603 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3604 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3605 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3606 | |
3607 | return 1; | |
3608 | } | |
3609 | ||
dee91e82 | 3610 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3611 | |
dee91e82 DE |
3612 | static void |
3613 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3614 | const gdb_byte *info_ptr, |
dee91e82 DE |
3615 | struct die_info *comp_unit_die, |
3616 | int has_children, | |
3617 | void *data) | |
9291a0cd | 3618 | { |
dee91e82 | 3619 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3620 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3621 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3622 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3623 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3624 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3625 | struct attribute *attr; |
dee91e82 | 3626 | int i; |
7b9f3c50 DE |
3627 | void **slot; |
3628 | struct quick_file_names *qfn; | |
9291a0cd | 3629 | |
0186c6a7 DE |
3630 | gdb_assert (! this_cu->is_debug_types); |
3631 | ||
07261596 TT |
3632 | /* Our callers never want to match partial units -- instead they |
3633 | will match the enclosing full CU. */ | |
3634 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3635 | { | |
3636 | this_cu->v.quick->no_file_data = 1; | |
3637 | return; | |
3638 | } | |
3639 | ||
0186c6a7 | 3640 | lh_cu = this_cu; |
7b9f3c50 | 3641 | slot = NULL; |
dee91e82 | 3642 | |
fff8551c | 3643 | line_header_up lh; |
9c541725 | 3644 | sect_offset line_offset {}; |
fff8551c | 3645 | |
dee91e82 | 3646 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3647 | if (attr) |
3648 | { | |
7b9f3c50 DE |
3649 | struct quick_file_names find_entry; |
3650 | ||
9c541725 | 3651 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3652 | |
3653 | /* We may have already read in this line header (TU line header sharing). | |
3654 | If we have we're done. */ | |
094b34ac | 3655 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3656 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3657 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3658 | &find_entry, INSERT); | |
3659 | if (*slot != NULL) | |
3660 | { | |
9a3c8263 | 3661 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3662 | return; |
7b9f3c50 DE |
3663 | } |
3664 | ||
3019eac3 | 3665 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3666 | } |
3667 | if (lh == NULL) | |
3668 | { | |
094b34ac | 3669 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3670 | return; |
9291a0cd TT |
3671 | } |
3672 | ||
8d749320 | 3673 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3674 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3675 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3676 | gdb_assert (slot != NULL); |
3677 | *slot = qfn; | |
9291a0cd | 3678 | |
d721ba37 | 3679 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3680 | |
fff8551c | 3681 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3682 | qfn->file_names = |
fff8551c PA |
3683 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3684 | for (i = 0; i < lh->file_names.size (); ++i) | |
3685 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3686 | qfn->real_names = NULL; |
9291a0cd | 3687 | |
094b34ac | 3688 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3689 | } |
3690 | ||
3691 | /* A helper for the "quick" functions which attempts to read the line | |
3692 | table for THIS_CU. */ | |
3693 | ||
3694 | static struct quick_file_names * | |
e4a48d9d | 3695 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3696 | { |
0186c6a7 DE |
3697 | /* This should never be called for TUs. */ |
3698 | gdb_assert (! this_cu->is_debug_types); | |
3699 | /* Nor type unit groups. */ | |
3700 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3701 | |
dee91e82 DE |
3702 | if (this_cu->v.quick->file_names != NULL) |
3703 | return this_cu->v.quick->file_names; | |
3704 | /* If we know there is no line data, no point in looking again. */ | |
3705 | if (this_cu->v.quick->no_file_data) | |
3706 | return NULL; | |
3707 | ||
0186c6a7 | 3708 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3709 | |
3710 | if (this_cu->v.quick->no_file_data) | |
3711 | return NULL; | |
3712 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3713 | } |
3714 | ||
3715 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3716 | real path for a given file name from the line table. */ |
2fdf6df6 | 3717 | |
9291a0cd | 3718 | static const char * |
7b9f3c50 DE |
3719 | dw2_get_real_path (struct objfile *objfile, |
3720 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3721 | { |
7b9f3c50 DE |
3722 | if (qfn->real_names == NULL) |
3723 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3724 | qfn->num_file_names, const char *); |
9291a0cd | 3725 | |
7b9f3c50 | 3726 | if (qfn->real_names[index] == NULL) |
14278e1f | 3727 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3728 | |
7b9f3c50 | 3729 | return qfn->real_names[index]; |
9291a0cd TT |
3730 | } |
3731 | ||
3732 | static struct symtab * | |
3733 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3734 | { | |
ed2dc618 SM |
3735 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3736 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3737 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3738 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3739 | |
43f3e411 DE |
3740 | if (cust == NULL) |
3741 | return NULL; | |
ed2dc618 | 3742 | |
43f3e411 | 3743 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3744 | } |
3745 | ||
7b9f3c50 DE |
3746 | /* Traversal function for dw2_forget_cached_source_info. */ |
3747 | ||
3748 | static int | |
3749 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3750 | { |
7b9f3c50 | 3751 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3752 | |
7b9f3c50 | 3753 | if (file_data->real_names) |
9291a0cd | 3754 | { |
7b9f3c50 | 3755 | int i; |
9291a0cd | 3756 | |
7b9f3c50 | 3757 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3758 | { |
7b9f3c50 DE |
3759 | xfree ((void*) file_data->real_names[i]); |
3760 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3761 | } |
3762 | } | |
7b9f3c50 DE |
3763 | |
3764 | return 1; | |
3765 | } | |
3766 | ||
3767 | static void | |
3768 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3769 | { | |
ed2dc618 SM |
3770 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3771 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 DE |
3772 | |
3773 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3774 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3775 | } |
3776 | ||
f8eba3c6 TT |
3777 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3778 | the symtabs and calls the iterator. */ | |
3779 | ||
3780 | static int | |
3781 | dw2_map_expand_apply (struct objfile *objfile, | |
3782 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3783 | const char *name, const char *real_path, |
14bc53a8 | 3784 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3785 | { |
43f3e411 | 3786 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3787 | |
3788 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3789 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3790 | return 0; |
3791 | ||
3792 | /* This may expand more than one symtab, and we want to iterate over | |
3793 | all of them. */ | |
58f0c718 | 3794 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3795 | |
14bc53a8 PA |
3796 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3797 | last_made, callback); | |
f8eba3c6 TT |
3798 | } |
3799 | ||
3800 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3801 | ||
14bc53a8 PA |
3802 | static bool |
3803 | dw2_map_symtabs_matching_filename | |
3804 | (struct objfile *objfile, const char *name, const char *real_path, | |
3805 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3806 | { |
c011a4f4 | 3807 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3808 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3809 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3810 | |
848e3e78 DE |
3811 | /* The rule is CUs specify all the files, including those used by |
3812 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3813 | |
b76e467d | 3814 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3815 | { |
3d7bb9d9 | 3816 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3817 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3818 | continue; |
3819 | ||
b76e467d | 3820 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3821 | if (file_data == NULL) |
9291a0cd TT |
3822 | continue; |
3823 | ||
b76e467d | 3824 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3825 | { |
7b9f3c50 | 3826 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3827 | const char *this_real_name; |
9291a0cd | 3828 | |
af529f8f | 3829 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3830 | { |
f5b95b50 | 3831 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3832 | callback)) |
3833 | return true; | |
288e77a7 | 3834 | continue; |
4aac40c8 | 3835 | } |
9291a0cd | 3836 | |
c011a4f4 DE |
3837 | /* Before we invoke realpath, which can get expensive when many |
3838 | files are involved, do a quick comparison of the basenames. */ | |
3839 | if (! basenames_may_differ | |
3840 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3841 | continue; | |
3842 | ||
da235a7c JK |
3843 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3844 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3845 | { |
da235a7c | 3846 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3847 | callback)) |
3848 | return true; | |
288e77a7 | 3849 | continue; |
da235a7c | 3850 | } |
9291a0cd | 3851 | |
da235a7c JK |
3852 | if (real_path != NULL) |
3853 | { | |
af529f8f JK |
3854 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3855 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3856 | if (this_real_name != NULL |
af529f8f | 3857 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3858 | { |
f5b95b50 | 3859 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3860 | callback)) |
3861 | return true; | |
288e77a7 | 3862 | continue; |
9291a0cd TT |
3863 | } |
3864 | } | |
3865 | } | |
3866 | } | |
3867 | ||
14bc53a8 | 3868 | return false; |
9291a0cd TT |
3869 | } |
3870 | ||
da51c347 DE |
3871 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3872 | ||
3873 | struct dw2_symtab_iterator | |
9291a0cd | 3874 | { |
ed2dc618 SM |
3875 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3876 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
da51c347 DE |
3877 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ |
3878 | int want_specific_block; | |
3879 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3880 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3881 | int block_index; | |
3882 | /* The kind of symbol we're looking for. */ | |
3883 | domain_enum domain; | |
3884 | /* The list of CUs from the index entry of the symbol, | |
3885 | or NULL if not found. */ | |
3886 | offset_type *vec; | |
3887 | /* The next element in VEC to look at. */ | |
3888 | int next; | |
3889 | /* The number of elements in VEC, or zero if there is no match. */ | |
3890 | int length; | |
8943b874 DE |
3891 | /* Have we seen a global version of the symbol? |
3892 | If so we can ignore all further global instances. | |
3893 | This is to work around gold/15646, inefficient gold-generated | |
3894 | indices. */ | |
3895 | int global_seen; | |
da51c347 | 3896 | }; |
9291a0cd | 3897 | |
da51c347 DE |
3898 | /* Initialize the index symtab iterator ITER. |
3899 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3900 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3901 | |
9291a0cd | 3902 | static void |
da51c347 | 3903 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3904 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
da51c347 DE |
3905 | int want_specific_block, |
3906 | int block_index, | |
3907 | domain_enum domain, | |
3908 | const char *name) | |
3909 | { | |
ed2dc618 | 3910 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3911 | iter->want_specific_block = want_specific_block; |
3912 | iter->block_index = block_index; | |
3913 | iter->domain = domain; | |
3914 | iter->next = 0; | |
8943b874 | 3915 | iter->global_seen = 0; |
da51c347 | 3916 | |
3063847f | 3917 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3918 | |
3919 | /* index is NULL if OBJF_READNOW. */ | |
3920 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3921 | iter->length = MAYBE_SWAP (*iter->vec); |
3922 | else | |
3923 | { | |
3924 | iter->vec = NULL; | |
3925 | iter->length = 0; | |
3926 | } | |
3927 | } | |
3928 | ||
3929 | /* Return the next matching CU or NULL if there are no more. */ | |
3930 | ||
3931 | static struct dwarf2_per_cu_data * | |
3932 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3933 | { | |
ed2dc618 SM |
3934 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3935 | ||
da51c347 DE |
3936 | for ( ; iter->next < iter->length; ++iter->next) |
3937 | { | |
3938 | offset_type cu_index_and_attrs = | |
3939 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3940 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3941 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3942 | /* This value is only valid for index versions >= 7. */ | |
3943 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3944 | gdb_index_symbol_kind symbol_kind = | |
3945 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3946 | /* Only check the symbol attributes if they're present. | |
3947 | Indices prior to version 7 don't record them, | |
3948 | and indices >= 7 may elide them for certain symbols | |
3949 | (gold does this). */ | |
3950 | int attrs_valid = | |
ed2dc618 | 3951 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3952 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3953 | ||
3190f0c6 | 3954 | /* Don't crash on bad data. */ |
b76e467d | 3955 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3956 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3957 | { |
b98664d3 | 3958 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3959 | " [in module %s]"), |
3960 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3961 | continue; |
3962 | } | |
3963 | ||
ff4c9fec | 3964 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3965 | |
da51c347 | 3966 | /* Skip if already read in. */ |
43f3e411 | 3967 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3968 | continue; |
3969 | ||
8943b874 DE |
3970 | /* Check static vs global. */ |
3971 | if (attrs_valid) | |
3972 | { | |
3973 | if (iter->want_specific_block | |
3974 | && want_static != is_static) | |
3975 | continue; | |
3976 | /* Work around gold/15646. */ | |
3977 | if (!is_static && iter->global_seen) | |
3978 | continue; | |
3979 | if (!is_static) | |
3980 | iter->global_seen = 1; | |
3981 | } | |
da51c347 DE |
3982 | |
3983 | /* Only check the symbol's kind if it has one. */ | |
3984 | if (attrs_valid) | |
3985 | { | |
3986 | switch (iter->domain) | |
3987 | { | |
3988 | case VAR_DOMAIN: | |
3989 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3990 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3991 | /* Some types are also in VAR_DOMAIN. */ | |
3992 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3993 | continue; | |
3994 | break; | |
3995 | case STRUCT_DOMAIN: | |
3996 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3997 | continue; | |
3998 | break; | |
3999 | case LABEL_DOMAIN: | |
4000 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4001 | continue; | |
4002 | break; | |
4003 | default: | |
4004 | break; | |
4005 | } | |
4006 | } | |
4007 | ||
4008 | ++iter->next; | |
4009 | return per_cu; | |
4010 | } | |
4011 | ||
4012 | return NULL; | |
4013 | } | |
4014 | ||
43f3e411 | 4015 | static struct compunit_symtab * |
da51c347 DE |
4016 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
4017 | const char *name, domain_enum domain) | |
9291a0cd | 4018 | { |
43f3e411 | 4019 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
4020 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4021 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 4022 | |
b5ec771e PA |
4023 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
4024 | ||
ed2dc618 SM |
4025 | struct dw2_symtab_iterator iter; |
4026 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4027 | |
ed2dc618 | 4028 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, 1, block_index, domain, name); |
9291a0cd | 4029 | |
ed2dc618 SM |
4030 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
4031 | { | |
4032 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 4033 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 SM |
4034 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
4035 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
da51c347 | 4036 | |
ed2dc618 SM |
4037 | sym = block_find_symbol (block, name, domain, |
4038 | block_find_non_opaque_type_preferred, | |
4039 | &with_opaque); | |
b2e2f908 | 4040 | |
ed2dc618 SM |
4041 | /* Some caution must be observed with overloaded functions |
4042 | and methods, since the index will not contain any overload | |
4043 | information (but NAME might contain it). */ | |
da51c347 | 4044 | |
ed2dc618 SM |
4045 | if (sym != NULL |
4046 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
4047 | return stab; | |
4048 | if (with_opaque != NULL | |
4049 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
4050 | stab_best = stab; | |
da51c347 | 4051 | |
ed2dc618 | 4052 | /* Keep looking through other CUs. */ |
9291a0cd | 4053 | } |
9291a0cd | 4054 | |
da51c347 | 4055 | return stab_best; |
9291a0cd TT |
4056 | } |
4057 | ||
4058 | static void | |
4059 | dw2_print_stats (struct objfile *objfile) | |
4060 | { | |
ed2dc618 SM |
4061 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4062 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4063 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4064 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 4065 | int count = 0; |
9291a0cd | 4066 | |
ed2dc618 | 4067 | for (int i = 0; i < total; ++i) |
9291a0cd | 4068 | { |
ff4c9fec | 4069 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4070 | |
43f3e411 | 4071 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4072 | ++count; |
4073 | } | |
e4a48d9d | 4074 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
4075 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
4076 | } | |
4077 | ||
779bd270 DE |
4078 | /* This dumps minimal information about the index. |
4079 | It is called via "mt print objfiles". | |
4080 | One use is to verify .gdb_index has been loaded by the | |
4081 | gdb.dwarf2/gdb-index.exp testcase. */ | |
4082 | ||
9291a0cd TT |
4083 | static void |
4084 | dw2_dump (struct objfile *objfile) | |
4085 | { | |
ed2dc618 SM |
4086 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4087 | = get_dwarf2_per_objfile (objfile); | |
4088 | ||
779bd270 DE |
4089 | gdb_assert (dwarf2_per_objfile->using_index); |
4090 | printf_filtered (".gdb_index:"); | |
4091 | if (dwarf2_per_objfile->index_table != NULL) | |
4092 | { | |
4093 | printf_filtered (" version %d\n", | |
4094 | dwarf2_per_objfile->index_table->version); | |
4095 | } | |
4096 | else | |
4097 | printf_filtered (" faked for \"readnow\"\n"); | |
4098 | printf_filtered ("\n"); | |
9291a0cd TT |
4099 | } |
4100 | ||
4101 | static void | |
3189cb12 DE |
4102 | dw2_relocate (struct objfile *objfile, |
4103 | const struct section_offsets *new_offsets, | |
4104 | const struct section_offsets *delta) | |
9291a0cd TT |
4105 | { |
4106 | /* There's nothing to relocate here. */ | |
4107 | } | |
4108 | ||
4109 | static void | |
4110 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4111 | const char *func_name) | |
4112 | { | |
ed2dc618 SM |
4113 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4114 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 4115 | |
ed2dc618 SM |
4116 | struct dw2_symtab_iterator iter; |
4117 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4118 | |
ed2dc618 SM |
4119 | /* Note: It doesn't matter what we pass for block_index here. */ |
4120 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4121 | func_name); | |
da51c347 | 4122 | |
ed2dc618 | 4123 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 4124 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 4125 | |
9291a0cd TT |
4126 | } |
4127 | ||
4128 | static void | |
4129 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4130 | { | |
ed2dc618 SM |
4131 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4132 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4133 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4134 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 4135 | |
ed2dc618 | 4136 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 4137 | { |
ff4c9fec | 4138 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4139 | |
58f0c718 TT |
4140 | /* We don't want to directly expand a partial CU, because if we |
4141 | read it with the wrong language, then assertion failures can | |
4142 | be triggered later on. See PR symtab/23010. So, tell | |
4143 | dw2_instantiate_symtab to skip partial CUs -- any important | |
4144 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
4145 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
4146 | } |
4147 | } | |
4148 | ||
4149 | static void | |
652a8996 JK |
4150 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4151 | const char *fullname) | |
9291a0cd | 4152 | { |
ed2dc618 SM |
4153 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4154 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
4155 | |
4156 | /* We don't need to consider type units here. | |
4157 | This is only called for examining code, e.g. expand_line_sal. | |
4158 | There can be an order of magnitude (or more) more type units | |
4159 | than comp units, and we avoid them if we can. */ | |
4160 | ||
b76e467d | 4161 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 4162 | { |
3d7bb9d9 | 4163 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4164 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4165 | continue; |
4166 | ||
b76e467d | 4167 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4168 | if (file_data == NULL) |
9291a0cd TT |
4169 | continue; |
4170 | ||
b76e467d | 4171 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4172 | { |
652a8996 JK |
4173 | const char *this_fullname = file_data->file_names[j]; |
4174 | ||
4175 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4176 | { |
58f0c718 | 4177 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
4178 | break; |
4179 | } | |
4180 | } | |
4181 | } | |
4182 | } | |
4183 | ||
9291a0cd | 4184 | static void |
ade7ed9e | 4185 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4186 | const char * name, domain_enum domain, |
ade7ed9e | 4187 | int global, |
40658b94 PH |
4188 | int (*callback) (struct block *, |
4189 | struct symbol *, void *), | |
b5ec771e | 4190 | void *data, symbol_name_match_type match, |
2edb89d3 | 4191 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4192 | { |
40658b94 | 4193 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4194 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4195 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4196 | } |
4197 | ||
b5ec771e PA |
4198 | /* Symbol name matcher for .gdb_index names. |
4199 | ||
4200 | Symbol names in .gdb_index have a few particularities: | |
4201 | ||
4202 | - There's no indication of which is the language of each symbol. | |
4203 | ||
4204 | Since each language has its own symbol name matching algorithm, | |
4205 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4206 | each symbol against all languages. This would be a potential |
4207 | performance problem if it were not mitigated by the | |
4208 | mapped_index::name_components lookup table, which significantly | |
4209 | reduces the number of times we need to call into this matcher, | |
4210 | making it a non-issue. | |
b5ec771e PA |
4211 | |
4212 | - Symbol names in the index have no overload (parameter) | |
4213 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4214 | appear as "foo" in the index, for example. | |
4215 | ||
4216 | This means that the lookup names passed to the symbol name | |
4217 | matcher functions must have no parameter information either | |
4218 | because (e.g.) symbol search name "foo" does not match | |
4219 | lookup-name "foo(int)" [while swapping search name for lookup | |
4220 | name would match]. | |
4221 | */ | |
4222 | class gdb_index_symbol_name_matcher | |
4223 | { | |
4224 | public: | |
4225 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4226 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4227 | ||
4228 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4229 | Returns true if any matcher matches. */ | |
4230 | bool matches (const char *symbol_name); | |
4231 | ||
4232 | private: | |
4233 | /* A reference to the lookup name we're matching against. */ | |
4234 | const lookup_name_info &m_lookup_name; | |
4235 | ||
4236 | /* A vector holding all the different symbol name matchers, for all | |
4237 | languages. */ | |
4238 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4239 | }; | |
4240 | ||
4241 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4242 | (const lookup_name_info &lookup_name) | |
4243 | : m_lookup_name (lookup_name) | |
4244 | { | |
4245 | /* Prepare the vector of comparison functions upfront, to avoid | |
4246 | doing the same work for each symbol. Care is taken to avoid | |
4247 | matching with the same matcher more than once if/when multiple | |
4248 | languages use the same matcher function. */ | |
4249 | auto &matchers = m_symbol_name_matcher_funcs; | |
4250 | matchers.reserve (nr_languages); | |
4251 | ||
4252 | matchers.push_back (default_symbol_name_matcher); | |
4253 | ||
4254 | for (int i = 0; i < nr_languages; i++) | |
4255 | { | |
4256 | const language_defn *lang = language_def ((enum language) i); | |
c63d3e8d | 4257 | symbol_name_matcher_ftype *name_matcher |
618daa93 | 4258 | = get_symbol_name_matcher (lang, m_lookup_name); |
c63d3e8d PA |
4259 | |
4260 | /* Don't insert the same comparison routine more than once. | |
4261 | Note that we do this linear walk instead of a seemingly | |
4262 | cheaper sorted insert, or use a std::set or something like | |
4263 | that, because relative order of function addresses is not | |
4264 | stable. This is not a problem in practice because the number | |
4265 | of supported languages is low, and the cost here is tiny | |
4266 | compared to the number of searches we'll do afterwards using | |
4267 | this object. */ | |
4268 | if (name_matcher != default_symbol_name_matcher | |
4269 | && (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4270 | == matchers.end ())) | |
4271 | matchers.push_back (name_matcher); | |
b5ec771e PA |
4272 | } |
4273 | } | |
4274 | ||
4275 | bool | |
4276 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4277 | { | |
4278 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4279 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4280 | return true; | |
4281 | ||
4282 | return false; | |
4283 | } | |
4284 | ||
e1ef7d7a PA |
4285 | /* Starting from a search name, return the string that finds the upper |
4286 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4287 | list. Returns the empty string to indicate that the upper bound is | |
4288 | the end of the list. */ | |
4289 | ||
4290 | static std::string | |
4291 | make_sort_after_prefix_name (const char *search_name) | |
4292 | { | |
4293 | /* When looking to complete "func", we find the upper bound of all | |
4294 | symbols that start with "func" by looking for where we'd insert | |
4295 | the closest string that would follow "func" in lexicographical | |
4296 | order. Usually, that's "func"-with-last-character-incremented, | |
4297 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4298 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4299 | Especially mind the 0xff character, which is a valid character in | |
4300 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4301 | rule out compilers allowing it in identifiers. Note that | |
4302 | conveniently, strcmp/strcasecmp are specified to compare | |
4303 | characters interpreted as unsigned char. So what we do is treat | |
4304 | the whole string as a base 256 number composed of a sequence of | |
4305 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4306 | to 0, and carries 1 to the following more-significant position. | |
4307 | If the very first character in SEARCH_NAME ends up incremented | |
4308 | and carries/overflows, then the upper bound is the end of the | |
4309 | list. The string after the empty string is also the empty | |
4310 | string. | |
4311 | ||
4312 | Some examples of this operation: | |
4313 | ||
4314 | SEARCH_NAME => "+1" RESULT | |
4315 | ||
4316 | "abc" => "abd" | |
4317 | "ab\xff" => "ac" | |
4318 | "\xff" "a" "\xff" => "\xff" "b" | |
4319 | "\xff" => "" | |
4320 | "\xff\xff" => "" | |
4321 | "" => "" | |
4322 | ||
4323 | Then, with these symbols for example: | |
4324 | ||
4325 | func | |
4326 | func1 | |
4327 | fund | |
4328 | ||
4329 | completing "func" looks for symbols between "func" and | |
4330 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4331 | which finds "func" and "func1", but not "fund". | |
4332 | ||
4333 | And with: | |
4334 | ||
4335 | funcÿ (Latin1 'ÿ' [0xff]) | |
4336 | funcÿ1 | |
4337 | fund | |
4338 | ||
4339 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4340 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4341 | ||
4342 | And with: | |
4343 | ||
4344 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4345 | ÿÿ1 | |
4346 | ||
4347 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4348 | the end of the list. | |
4349 | */ | |
4350 | std::string after = search_name; | |
4351 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4352 | after.pop_back (); | |
4353 | if (!after.empty ()) | |
4354 | after.back () = (unsigned char) after.back () + 1; | |
4355 | return after; | |
4356 | } | |
4357 | ||
5c58de74 | 4358 | /* See declaration. */ |
61d96d7e | 4359 | |
5c58de74 PA |
4360 | std::pair<std::vector<name_component>::const_iterator, |
4361 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 4362 | mapped_index_base::find_name_components_bounds |
5c58de74 | 4363 | (const lookup_name_info &lookup_name_without_params) const |
3f563c84 | 4364 | { |
5c58de74 PA |
4365 | auto *name_cmp |
4366 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4367 | |
4368 | const char *cplus | |
c62446b1 | 4369 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4370 | |
3f563c84 PA |
4371 | /* Comparison function object for lower_bound that matches against a |
4372 | given symbol name. */ | |
4373 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4374 | const char *name) | |
4375 | { | |
5c58de74 | 4376 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4377 | const char *elem_name = elem_qualified + elem.name_offset; |
4378 | return name_cmp (elem_name, name) < 0; | |
4379 | }; | |
4380 | ||
4381 | /* Comparison function object for upper_bound that matches against a | |
4382 | given symbol name. */ | |
4383 | auto lookup_compare_upper = [&] (const char *name, | |
4384 | const name_component &elem) | |
4385 | { | |
5c58de74 | 4386 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4387 | const char *elem_name = elem_qualified + elem.name_offset; |
4388 | return name_cmp (name, elem_name) < 0; | |
4389 | }; | |
4390 | ||
5c58de74 PA |
4391 | auto begin = this->name_components.begin (); |
4392 | auto end = this->name_components.end (); | |
3f563c84 PA |
4393 | |
4394 | /* Find the lower bound. */ | |
4395 | auto lower = [&] () | |
4396 | { | |
5c58de74 | 4397 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4398 | return begin; |
4399 | else | |
4400 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4401 | } (); | |
4402 | ||
4403 | /* Find the upper bound. */ | |
4404 | auto upper = [&] () | |
4405 | { | |
5c58de74 | 4406 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4407 | { |
e1ef7d7a PA |
4408 | /* In completion mode, we want UPPER to point past all |
4409 | symbols names that have the same prefix. I.e., with | |
4410 | these symbols, and completing "func": | |
4411 | ||
4412 | function << lower bound | |
4413 | function1 | |
4414 | other_function << upper bound | |
4415 | ||
4416 | We find the upper bound by looking for the insertion | |
4417 | point of "func"-with-last-character-incremented, | |
4418 | i.e. "fund". */ | |
4419 | std::string after = make_sort_after_prefix_name (cplus); | |
4420 | if (after.empty ()) | |
3f563c84 | 4421 | return end; |
e6b2f5ef PA |
4422 | return std::lower_bound (lower, end, after.c_str (), |
4423 | lookup_compare_lower); | |
3f563c84 PA |
4424 | } |
4425 | else | |
4426 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4427 | } (); | |
4428 | ||
5c58de74 PA |
4429 | return {lower, upper}; |
4430 | } | |
4431 | ||
4432 | /* See declaration. */ | |
4433 | ||
4434 | void | |
44ed8f3e | 4435 | mapped_index_base::build_name_components () |
5c58de74 PA |
4436 | { |
4437 | if (!this->name_components.empty ()) | |
4438 | return; | |
4439 | ||
4440 | this->name_components_casing = case_sensitivity; | |
4441 | auto *name_cmp | |
4442 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4443 | ||
4444 | /* The code below only knows how to break apart components of C++ | |
4445 | symbol names (and other languages that use '::' as | |
4446 | namespace/module separator). If we add support for wild matching | |
4447 | to some language that uses some other operator (E.g., Ada, Go and | |
4448 | D use '.'), then we'll need to try splitting the symbol name | |
4449 | according to that language too. Note that Ada does support wild | |
4450 | matching, but doesn't currently support .gdb_index. */ | |
44ed8f3e PA |
4451 | auto count = this->symbol_name_count (); |
4452 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 4453 | { |
44ed8f3e | 4454 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
4455 | continue; |
4456 | ||
4457 | const char *name = this->symbol_name_at (idx); | |
4458 | ||
4459 | /* Add each name component to the name component table. */ | |
4460 | unsigned int previous_len = 0; | |
4461 | for (unsigned int current_len = cp_find_first_component (name); | |
4462 | name[current_len] != '\0'; | |
4463 | current_len += cp_find_first_component (name + current_len)) | |
4464 | { | |
4465 | gdb_assert (name[current_len] == ':'); | |
4466 | this->name_components.push_back ({previous_len, idx}); | |
4467 | /* Skip the '::'. */ | |
4468 | current_len += 2; | |
4469 | previous_len = current_len; | |
4470 | } | |
4471 | this->name_components.push_back ({previous_len, idx}); | |
4472 | } | |
4473 | ||
4474 | /* Sort name_components elements by name. */ | |
4475 | auto name_comp_compare = [&] (const name_component &left, | |
4476 | const name_component &right) | |
4477 | { | |
4478 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4479 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4480 | ||
4481 | const char *left_name = left_qualified + left.name_offset; | |
4482 | const char *right_name = right_qualified + right.name_offset; | |
4483 | ||
4484 | return name_cmp (left_name, right_name) < 0; | |
4485 | }; | |
4486 | ||
4487 | std::sort (this->name_components.begin (), | |
4488 | this->name_components.end (), | |
4489 | name_comp_compare); | |
4490 | } | |
4491 | ||
4492 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
4493 | mapped_index_base instead of the containing objfile. This is split |
4494 | to a separate function in order to be able to unit test the | |
4495 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 4496 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 4497 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
4498 | |
4499 | static void | |
4500 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 4501 | (mapped_index_base &index, |
5c58de74 PA |
4502 | const lookup_name_info &lookup_name_in, |
4503 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4504 | enum search_domain kind, | |
4505 | gdb::function_view<void (offset_type)> match_callback) | |
4506 | { | |
4507 | lookup_name_info lookup_name_without_params | |
4508 | = lookup_name_in.make_ignore_params (); | |
4509 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4510 | (lookup_name_without_params); | |
4511 | ||
4512 | /* Build the symbol name component sorted vector, if we haven't | |
4513 | yet. */ | |
4514 | index.build_name_components (); | |
4515 | ||
4516 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4517 | ||
3f563c84 PA |
4518 | /* Now for each symbol name in range, check to see if we have a name |
4519 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4520 | ||
4521 | /* The same symbol may appear more than once in the range though. | |
4522 | E.g., if we're looking for symbols that complete "w", and we have | |
4523 | a symbol named "w1::w2", we'll find the two name components for | |
4524 | that same symbol in the range. To be sure we only call the | |
4525 | callback once per symbol, we first collect the symbol name | |
4526 | indexes that matched in a temporary vector and ignore | |
4527 | duplicates. */ | |
4528 | std::vector<offset_type> matches; | |
5c58de74 | 4529 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4530 | |
5c58de74 | 4531 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4532 | { |
5c58de74 | 4533 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4534 | |
4535 | if (!lookup_name_matcher.matches (qualified) | |
4536 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4537 | continue; |
4538 | ||
5c58de74 | 4539 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4540 | } |
4541 | ||
4542 | std::sort (matches.begin (), matches.end ()); | |
4543 | ||
4544 | /* Finally call the callback, once per match. */ | |
4545 | ULONGEST prev = -1; | |
4546 | for (offset_type idx : matches) | |
4547 | { | |
4548 | if (prev != idx) | |
4549 | { | |
4550 | match_callback (idx); | |
4551 | prev = idx; | |
4552 | } | |
4553 | } | |
4554 | ||
4555 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4556 | (offset_type)-1 are both possible values. */ | |
4557 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4558 | } | |
4559 | ||
c62446b1 PA |
4560 | #if GDB_SELF_TEST |
4561 | ||
4562 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4563 | ||
a3c5fafd PA |
4564 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4565 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4566 | mapped_index_base interface. Builds an index from the symbol list | |
4567 | passed as parameter to the constructor. */ | |
4568 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4569 | { |
4570 | public: | |
a3c5fafd PA |
4571 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4572 | : m_symbol_table (symbols) | |
c62446b1 PA |
4573 | {} |
4574 | ||
a3c5fafd | 4575 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4576 | |
a3c5fafd | 4577 | /* Return the number of names in the symbol table. */ |
632e107b | 4578 | size_t symbol_name_count () const override |
c62446b1 | 4579 | { |
a3c5fafd | 4580 | return m_symbol_table.size (); |
c62446b1 PA |
4581 | } |
4582 | ||
a3c5fafd | 4583 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4584 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4585 | { |
4586 | return m_symbol_table[idx]; | |
4587 | } | |
c62446b1 | 4588 | |
a3c5fafd PA |
4589 | private: |
4590 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4591 | }; |
4592 | ||
4593 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4594 | string, to pass to print routines. */ | |
4595 | ||
4596 | static const char * | |
4597 | string_or_null (const char *str) | |
4598 | { | |
4599 | return str != NULL ? str : "<null>"; | |
4600 | } | |
4601 | ||
4602 | /* Check if a lookup_name_info built from | |
4603 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4604 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4605 | matching order. If no match expected, then an empty list is | |
4606 | specified. Returns true on success. On failure prints a warning | |
4607 | indicating the file:line that failed, and returns false. */ | |
4608 | ||
4609 | static bool | |
4610 | check_match (const char *file, int line, | |
4611 | mock_mapped_index &mock_index, | |
4612 | const char *name, symbol_name_match_type match_type, | |
4613 | bool completion_mode, | |
4614 | std::initializer_list<const char *> expected_list) | |
4615 | { | |
4616 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4617 | ||
4618 | bool matched = true; | |
4619 | ||
4620 | auto mismatch = [&] (const char *expected_str, | |
4621 | const char *got) | |
4622 | { | |
4623 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4624 | "expected=\"%s\", got=\"%s\"\n"), | |
4625 | file, line, | |
4626 | (match_type == symbol_name_match_type::FULL | |
4627 | ? "FULL" : "WILD"), | |
4628 | name, string_or_null (expected_str), string_or_null (got)); | |
4629 | matched = false; | |
4630 | }; | |
4631 | ||
4632 | auto expected_it = expected_list.begin (); | |
4633 | auto expected_end = expected_list.end (); | |
4634 | ||
a3c5fafd | 4635 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4636 | NULL, ALL_DOMAIN, |
4637 | [&] (offset_type idx) | |
4638 | { | |
a3c5fafd | 4639 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4640 | const char *expected_str |
4641 | = expected_it == expected_end ? NULL : *expected_it++; | |
4642 | ||
4643 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4644 | mismatch (expected_str, matched_name); | |
4645 | }); | |
4646 | ||
4647 | const char *expected_str | |
4648 | = expected_it == expected_end ? NULL : *expected_it++; | |
4649 | if (expected_str != NULL) | |
4650 | mismatch (expected_str, NULL); | |
4651 | ||
4652 | return matched; | |
4653 | } | |
4654 | ||
4655 | /* The symbols added to the mock mapped_index for testing (in | |
4656 | canonical form). */ | |
4657 | static const char *test_symbols[] = { | |
4658 | "function", | |
4659 | "std::bar", | |
4660 | "std::zfunction", | |
4661 | "std::zfunction2", | |
4662 | "w1::w2", | |
4663 | "ns::foo<char*>", | |
4664 | "ns::foo<int>", | |
4665 | "ns::foo<long>", | |
a20714ff PA |
4666 | "ns2::tmpl<int>::foo2", |
4667 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4668 | |
e1ef7d7a PA |
4669 | /* These are used to check that the increment-last-char in the |
4670 | matching algorithm for completion doesn't match "t1_fund" when | |
4671 | completing "t1_func". */ | |
4672 | "t1_func", | |
4673 | "t1_func1", | |
4674 | "t1_fund", | |
4675 | "t1_fund1", | |
4676 | ||
4677 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4678 | cp-name-parser understands this as a single identifier ("função" | |
4679 | is "function" in PT). */ | |
4680 | u8"u8função", | |
4681 | ||
4682 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4683 | "yfunc\377", | |
4684 | ||
4685 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4686 | "\377", | |
4687 | "\377\377123", | |
4688 | ||
c62446b1 PA |
4689 | /* A name with all sorts of complications. Starts with "z" to make |
4690 | it easier for the completion tests below. */ | |
4691 | #define Z_SYM_NAME \ | |
4692 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4693 | "::tuple<(anonymous namespace)::ui*, " \ | |
4694 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4695 | ||
4696 | Z_SYM_NAME | |
4697 | }; | |
4698 | ||
a3c5fafd PA |
4699 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4700 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4701 | in completion mode. */ | |
5c58de74 PA |
4702 | |
4703 | static bool | |
a3c5fafd | 4704 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4705 | const char *search_name, |
4706 | gdb::array_view<const char *> expected_syms) | |
4707 | { | |
4708 | lookup_name_info lookup_name (search_name, | |
4709 | symbol_name_match_type::FULL, true); | |
4710 | ||
4711 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4712 | ||
4713 | size_t distance = std::distance (bounds.first, bounds.second); | |
4714 | if (distance != expected_syms.size ()) | |
4715 | return false; | |
4716 | ||
4717 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4718 | { | |
4719 | auto nc_elem = bounds.first + exp_elem; | |
4720 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4721 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4722 | return false; | |
4723 | } | |
4724 | ||
4725 | return true; | |
4726 | } | |
4727 | ||
4728 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4729 | method. */ | |
4730 | ||
c62446b1 | 4731 | static void |
5c58de74 PA |
4732 | test_mapped_index_find_name_component_bounds () |
4733 | { | |
4734 | mock_mapped_index mock_index (test_symbols); | |
4735 | ||
a3c5fafd | 4736 | mock_index.build_name_components (); |
5c58de74 PA |
4737 | |
4738 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4739 | method in completion mode. */ | |
4740 | { | |
4741 | static const char *expected_syms[] = { | |
4742 | "t1_func", | |
4743 | "t1_func1", | |
5c58de74 PA |
4744 | }; |
4745 | ||
a3c5fafd | 4746 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4747 | "t1_func", expected_syms)); |
4748 | } | |
4749 | ||
4750 | /* Check that the increment-last-char in the name matching algorithm | |
4751 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4752 | { | |
4753 | static const char *expected_syms1[] = { | |
4754 | "\377", | |
4755 | "\377\377123", | |
4756 | }; | |
a3c5fafd | 4757 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4758 | "\377", expected_syms1)); |
4759 | ||
4760 | static const char *expected_syms2[] = { | |
4761 | "\377\377123", | |
4762 | }; | |
a3c5fafd | 4763 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4764 | "\377\377", expected_syms2)); |
4765 | } | |
4766 | } | |
4767 | ||
4768 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4769 | ||
4770 | static void | |
4771 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4772 | { |
4773 | mock_mapped_index mock_index (test_symbols); | |
4774 | ||
4775 | /* We let all tests run until the end even if some fails, for debug | |
4776 | convenience. */ | |
4777 | bool any_mismatch = false; | |
4778 | ||
4779 | /* Create the expected symbols list (an initializer_list). Needed | |
4780 | because lists have commas, and we need to pass them to CHECK, | |
4781 | which is a macro. */ | |
4782 | #define EXPECT(...) { __VA_ARGS__ } | |
4783 | ||
4784 | /* Wrapper for check_match that passes down the current | |
4785 | __FILE__/__LINE__. */ | |
4786 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4787 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4788 | mock_index, \ | |
4789 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4790 | EXPECTED_LIST) | |
4791 | ||
4792 | /* Identity checks. */ | |
4793 | for (const char *sym : test_symbols) | |
4794 | { | |
4795 | /* Should be able to match all existing symbols. */ | |
4796 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4797 | EXPECT (sym)); | |
4798 | ||
4799 | /* Should be able to match all existing symbols with | |
4800 | parameters. */ | |
4801 | std::string with_params = std::string (sym) + "(int)"; | |
4802 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4803 | EXPECT (sym)); | |
4804 | ||
4805 | /* Should be able to match all existing symbols with | |
4806 | parameters and qualifiers. */ | |
4807 | with_params = std::string (sym) + " ( int ) const"; | |
4808 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4809 | EXPECT (sym)); | |
4810 | ||
4811 | /* This should really find sym, but cp-name-parser.y doesn't | |
4812 | know about lvalue/rvalue qualifiers yet. */ | |
4813 | with_params = std::string (sym) + " ( int ) &&"; | |
4814 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4815 | {}); | |
4816 | } | |
4817 | ||
e1ef7d7a PA |
4818 | /* Check that the name matching algorithm for completion doesn't get |
4819 | confused with Latin1 'ÿ' / 0xff. */ | |
4820 | { | |
4821 | static const char str[] = "\377"; | |
4822 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4823 | EXPECT ("\377", "\377\377123")); | |
4824 | } | |
4825 | ||
4826 | /* Check that the increment-last-char in the matching algorithm for | |
4827 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4828 | { | |
4829 | static const char str[] = "t1_func"; | |
4830 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4831 | EXPECT ("t1_func", "t1_func1")); | |
4832 | } | |
4833 | ||
c62446b1 PA |
4834 | /* Check that completion mode works at each prefix of the expected |
4835 | symbol name. */ | |
4836 | { | |
4837 | static const char str[] = "function(int)"; | |
4838 | size_t len = strlen (str); | |
4839 | std::string lookup; | |
4840 | ||
4841 | for (size_t i = 1; i < len; i++) | |
4842 | { | |
4843 | lookup.assign (str, i); | |
4844 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4845 | EXPECT ("function")); | |
4846 | } | |
4847 | } | |
4848 | ||
4849 | /* While "w" is a prefix of both components, the match function | |
4850 | should still only be called once. */ | |
4851 | { | |
4852 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4853 | EXPECT ("w1::w2")); | |
a20714ff PA |
4854 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4855 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4856 | } |
4857 | ||
4858 | /* Same, with a "complicated" symbol. */ | |
4859 | { | |
4860 | static const char str[] = Z_SYM_NAME; | |
4861 | size_t len = strlen (str); | |
4862 | std::string lookup; | |
4863 | ||
4864 | for (size_t i = 1; i < len; i++) | |
4865 | { | |
4866 | lookup.assign (str, i); | |
4867 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4868 | EXPECT (Z_SYM_NAME)); | |
4869 | } | |
4870 | } | |
4871 | ||
4872 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4873 | { | |
4874 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4875 | {}); | |
4876 | } | |
4877 | ||
4878 | /* A complete symbol with parameters matches any overload, since the | |
4879 | index has no overload info. */ | |
4880 | { | |
4881 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4882 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4883 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4884 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4885 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4886 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4887 | } |
4888 | ||
4889 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4890 | template argument list. */ | |
4891 | { | |
4892 | static const char expected[] = "ns::foo<int>"; | |
4893 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4894 | EXPECT (expected)); | |
a20714ff PA |
4895 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4896 | EXPECT (expected)); | |
c62446b1 PA |
4897 | } |
4898 | ||
4899 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4900 | template argument list that includes a pointer. */ | |
4901 | { | |
4902 | static const char expected[] = "ns::foo<char*>"; | |
4903 | /* Try both completion and non-completion modes. */ | |
4904 | static const bool completion_mode[2] = {false, true}; | |
4905 | for (size_t i = 0; i < 2; i++) | |
4906 | { | |
4907 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4908 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4909 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4910 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4911 | |
4912 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4913 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4914 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4915 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4916 | } |
4917 | } | |
4918 | ||
4919 | { | |
4920 | /* Check method qualifiers are ignored. */ | |
4921 | static const char expected[] = "ns::foo<char*>"; | |
4922 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4923 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4924 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4925 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4926 | CHECK_MATCH ("foo < char * > ( int ) const", |
4927 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4928 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4929 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4930 | } |
4931 | ||
4932 | /* Test lookup names that don't match anything. */ | |
4933 | { | |
a20714ff PA |
4934 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4935 | {}); | |
4936 | ||
c62446b1 PA |
4937 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4938 | {}); | |
4939 | } | |
4940 | ||
a20714ff PA |
4941 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4942 | which should not be confused with a parameter list. */ | |
4943 | { | |
4944 | static const char *syms[] = { | |
4945 | "A::B::C", | |
4946 | "B::C", | |
4947 | "C", | |
4948 | "A :: B :: C ( int )", | |
4949 | "B :: C ( int )", | |
4950 | "C ( int )", | |
4951 | }; | |
4952 | ||
4953 | for (const char *s : syms) | |
4954 | { | |
4955 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4956 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4957 | } | |
4958 | } | |
4959 | ||
4960 | { | |
4961 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4962 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4963 | EXPECT (expected)); | |
4964 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4965 | EXPECT (expected)); | |
4966 | } | |
4967 | ||
c62446b1 PA |
4968 | SELF_CHECK (!any_mismatch); |
4969 | ||
4970 | #undef EXPECT | |
4971 | #undef CHECK_MATCH | |
4972 | } | |
4973 | ||
5c58de74 PA |
4974 | static void |
4975 | run_test () | |
4976 | { | |
4977 | test_mapped_index_find_name_component_bounds (); | |
4978 | test_dw2_expand_symtabs_matching_symbol (); | |
4979 | } | |
4980 | ||
c62446b1 PA |
4981 | }} // namespace selftests::dw2_expand_symtabs_matching |
4982 | ||
4983 | #endif /* GDB_SELF_TEST */ | |
4984 | ||
4b514bc8 JK |
4985 | /* If FILE_MATCHER is NULL or if PER_CU has |
4986 | dwarf2_per_cu_quick_data::MARK set (see | |
4987 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4988 | EXPANSION_NOTIFY on it. */ | |
4989 | ||
4990 | static void | |
4991 | dw2_expand_symtabs_matching_one | |
4992 | (struct dwarf2_per_cu_data *per_cu, | |
4993 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4994 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4995 | { | |
4996 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4997 | { | |
4998 | bool symtab_was_null | |
4999 | = (per_cu->v.quick->compunit_symtab == NULL); | |
5000 | ||
58f0c718 | 5001 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
5002 | |
5003 | if (expansion_notify != NULL | |
5004 | && symtab_was_null | |
5005 | && per_cu->v.quick->compunit_symtab != NULL) | |
5006 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5007 | } | |
5008 | } | |
5009 | ||
3f563c84 PA |
5010 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
5011 | matched, to expand corresponding CUs that were marked. IDX is the | |
5012 | index of the symbol name that matched. */ | |
5013 | ||
5014 | static void | |
5015 | dw2_expand_marked_cus | |
ed2dc618 | 5016 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
5017 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
5018 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5019 | search_domain kind) | |
5020 | { | |
3f563c84 PA |
5021 | offset_type *vec, vec_len, vec_idx; |
5022 | bool global_seen = false; | |
ed2dc618 | 5023 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 5024 | |
61920122 | 5025 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 5026 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
5027 | vec_len = MAYBE_SWAP (vec[0]); |
5028 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
5029 | { | |
61920122 PA |
5030 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
5031 | /* This value is only valid for index versions >= 7. */ | |
5032 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
5033 | gdb_index_symbol_kind symbol_kind = | |
5034 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
5035 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
5036 | /* Only check the symbol attributes if they're present. | |
5037 | Indices prior to version 7 don't record them, | |
5038 | and indices >= 7 may elide them for certain symbols | |
5039 | (gold does this). */ | |
5040 | int attrs_valid = | |
5041 | (index.version >= 7 | |
5042 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
5043 | ||
5044 | /* Work around gold/15646. */ | |
5045 | if (attrs_valid) | |
9291a0cd | 5046 | { |
61920122 PA |
5047 | if (!is_static && global_seen) |
5048 | continue; | |
5049 | if (!is_static) | |
5050 | global_seen = true; | |
5051 | } | |
3190f0c6 | 5052 | |
61920122 PA |
5053 | /* Only check the symbol's kind if it has one. */ |
5054 | if (attrs_valid) | |
5055 | { | |
5056 | switch (kind) | |
8943b874 | 5057 | { |
61920122 PA |
5058 | case VARIABLES_DOMAIN: |
5059 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
5060 | continue; | |
5061 | break; | |
5062 | case FUNCTIONS_DOMAIN: | |
5063 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 5064 | continue; |
61920122 PA |
5065 | break; |
5066 | case TYPES_DOMAIN: | |
5067 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
5068 | continue; | |
5069 | break; | |
5070 | default: | |
5071 | break; | |
8943b874 | 5072 | } |
61920122 | 5073 | } |
8943b874 | 5074 | |
61920122 | 5075 | /* Don't crash on bad data. */ |
b76e467d | 5076 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5077 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 5078 | { |
b98664d3 | 5079 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
5080 | " [in module %s]"), |
5081 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
5082 | continue; |
5083 | } | |
5084 | ||
ff4c9fec | 5085 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
5086 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
5087 | expansion_notify); | |
61920122 PA |
5088 | } |
5089 | } | |
5090 | ||
4b514bc8 JK |
5091 | /* If FILE_MATCHER is non-NULL, set all the |
5092 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
5093 | that match FILE_MATCHER. */ | |
5094 | ||
61920122 | 5095 | static void |
4b514bc8 | 5096 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
5097 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5098 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 5099 | { |
4b514bc8 | 5100 | if (file_matcher == NULL) |
61920122 PA |
5101 | return; |
5102 | ||
4b514bc8 JK |
5103 | objfile *const objfile = dwarf2_per_objfile->objfile; |
5104 | ||
5105 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5106 | htab_eq_pointer, | |
5107 | NULL, xcalloc, xfree)); | |
5108 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
5109 | htab_eq_pointer, |
5110 | NULL, xcalloc, xfree)); | |
61920122 | 5111 | |
4b514bc8 JK |
5112 | /* The rule is CUs specify all the files, including those used by |
5113 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 5114 | |
b76e467d | 5115 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5116 | { |
927aa2e7 JK |
5117 | QUIT; |
5118 | ||
5119 | per_cu->v.quick->mark = 0; | |
5120 | ||
5121 | /* We only need to look at symtabs not already expanded. */ | |
5122 | if (per_cu->v.quick->compunit_symtab) | |
5123 | continue; | |
5124 | ||
b76e467d | 5125 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5126 | if (file_data == NULL) |
5127 | continue; | |
5128 | ||
5129 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5130 | continue; | |
5131 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
5132 | { | |
5133 | per_cu->v.quick->mark = 1; | |
5134 | continue; | |
5135 | } | |
5136 | ||
b76e467d | 5137 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
5138 | { |
5139 | const char *this_real_name; | |
5140 | ||
5141 | if (file_matcher (file_data->file_names[j], false)) | |
5142 | { | |
5143 | per_cu->v.quick->mark = 1; | |
5144 | break; | |
5145 | } | |
5146 | ||
5147 | /* Before we invoke realpath, which can get expensive when many | |
5148 | files are involved, do a quick comparison of the basenames. */ | |
5149 | if (!basenames_may_differ | |
5150 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5151 | true)) | |
5152 | continue; | |
5153 | ||
5154 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
5155 | if (file_matcher (this_real_name, false)) | |
5156 | { | |
5157 | per_cu->v.quick->mark = 1; | |
5158 | break; | |
5159 | } | |
5160 | } | |
5161 | ||
b76e467d SM |
5162 | void **slot = htab_find_slot (per_cu->v.quick->mark |
5163 | ? visited_found.get () | |
5164 | : visited_not_found.get (), | |
5165 | file_data, INSERT); | |
927aa2e7 JK |
5166 | *slot = file_data; |
5167 | } | |
5168 | } | |
5169 | ||
5170 | static void | |
5171 | dw2_expand_symtabs_matching | |
5172 | (struct objfile *objfile, | |
5173 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5174 | const lookup_name_info &lookup_name, | |
5175 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5176 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5177 | enum search_domain kind) | |
5178 | { | |
ed2dc618 SM |
5179 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5180 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5181 | |
5182 | /* index_table is NULL if OBJF_READNOW. */ | |
5183 | if (!dwarf2_per_objfile->index_table) | |
5184 | return; | |
5185 | ||
ed2dc618 | 5186 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
5187 | |
5188 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5189 | ||
5190 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5191 | symbol_matcher, | |
5192 | kind, [&] (offset_type idx) | |
5193 | { | |
ed2dc618 | 5194 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 JK |
5195 | expansion_notify, kind); |
5196 | }); | |
5197 | } | |
5198 | ||
5199 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
5200 | symtab. */ | |
5201 | ||
5202 | static struct compunit_symtab * | |
5203 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5204 | CORE_ADDR pc) | |
5205 | { | |
5206 | int i; | |
5207 | ||
5208 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
5209 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5210 | return cust; | |
5211 | ||
5212 | if (cust->includes == NULL) | |
5213 | return NULL; | |
5214 | ||
5215 | for (i = 0; cust->includes[i]; ++i) | |
5216 | { | |
5217 | struct compunit_symtab *s = cust->includes[i]; | |
5218 | ||
5219 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
5220 | if (s != NULL) | |
5221 | return s; | |
5222 | } | |
5223 | ||
5224 | return NULL; | |
5225 | } | |
5226 | ||
5227 | static struct compunit_symtab * | |
5228 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5229 | struct bound_minimal_symbol msymbol, | |
5230 | CORE_ADDR pc, | |
5231 | struct obj_section *section, | |
5232 | int warn_if_readin) | |
5233 | { | |
5234 | struct dwarf2_per_cu_data *data; | |
5235 | struct compunit_symtab *result; | |
5236 | ||
927aa2e7 JK |
5237 | if (!objfile->psymtabs_addrmap) |
5238 | return NULL; | |
5239 | ||
5240 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, | |
5241 | pc); | |
5242 | if (!data) | |
5243 | return NULL; | |
5244 | ||
5245 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
5246 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
5247 | paddress (get_objfile_arch (objfile), pc)); | |
5248 | ||
5249 | result | |
58f0c718 TT |
5250 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
5251 | false), | |
927aa2e7 JK |
5252 | pc); |
5253 | gdb_assert (result != NULL); | |
5254 | return result; | |
5255 | } | |
5256 | ||
5257 | static void | |
5258 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
5259 | void *data, int need_fullname) | |
5260 | { | |
ed2dc618 SM |
5261 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5262 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5263 | |
5264 | if (!dwarf2_per_objfile->filenames_cache) | |
5265 | { | |
5266 | dwarf2_per_objfile->filenames_cache.emplace (); | |
5267 | ||
5268 | htab_up visited (htab_create_alloc (10, | |
5269 | htab_hash_pointer, htab_eq_pointer, | |
5270 | NULL, xcalloc, xfree)); | |
5271 | ||
5272 | /* The rule is CUs specify all the files, including those used | |
5273 | by any TU, so there's no need to scan TUs here. We can | |
5274 | ignore file names coming from already-expanded CUs. */ | |
5275 | ||
b76e467d | 5276 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5277 | { |
927aa2e7 JK |
5278 | if (per_cu->v.quick->compunit_symtab) |
5279 | { | |
5280 | void **slot = htab_find_slot (visited.get (), | |
5281 | per_cu->v.quick->file_names, | |
5282 | INSERT); | |
5283 | ||
5284 | *slot = per_cu->v.quick->file_names; | |
5285 | } | |
5286 | } | |
5287 | ||
b76e467d | 5288 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5289 | { |
927aa2e7 JK |
5290 | /* We only need to look at symtabs not already expanded. */ |
5291 | if (per_cu->v.quick->compunit_symtab) | |
5292 | continue; | |
5293 | ||
b76e467d | 5294 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5295 | if (file_data == NULL) |
5296 | continue; | |
5297 | ||
b76e467d | 5298 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
5299 | if (*slot) |
5300 | { | |
5301 | /* Already visited. */ | |
5302 | continue; | |
5303 | } | |
5304 | *slot = file_data; | |
5305 | ||
5306 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5307 | { | |
5308 | const char *filename = file_data->file_names[j]; | |
5309 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5310 | } | |
5311 | } | |
5312 | } | |
5313 | ||
5314 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5315 | { | |
5316 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
5317 | ||
5318 | if (need_fullname) | |
5319 | this_real_name = gdb_realpath (filename); | |
5320 | (*fun) (filename, this_real_name.get (), data); | |
5321 | }); | |
5322 | } | |
5323 | ||
5324 | static int | |
5325 | dw2_has_symbols (struct objfile *objfile) | |
5326 | { | |
5327 | return 1; | |
5328 | } | |
5329 | ||
5330 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5331 | { | |
5332 | dw2_has_symbols, | |
5333 | dw2_find_last_source_symtab, | |
5334 | dw2_forget_cached_source_info, | |
5335 | dw2_map_symtabs_matching_filename, | |
5336 | dw2_lookup_symbol, | |
5337 | dw2_print_stats, | |
5338 | dw2_dump, | |
5339 | dw2_relocate, | |
5340 | dw2_expand_symtabs_for_function, | |
5341 | dw2_expand_all_symtabs, | |
5342 | dw2_expand_symtabs_with_fullname, | |
5343 | dw2_map_matching_symbols, | |
5344 | dw2_expand_symtabs_matching, | |
5345 | dw2_find_pc_sect_compunit_symtab, | |
5346 | NULL, | |
5347 | dw2_map_symbol_filenames | |
5348 | }; | |
5349 | ||
5350 | /* DWARF-5 debug_names reader. */ | |
5351 | ||
5352 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
5353 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
5354 | ||
5355 | /* A helper function that reads the .debug_names section in SECTION | |
5356 | and fills in MAP. FILENAME is the name of the file containing the | |
5357 | section; it is used for error reporting. | |
5358 | ||
5359 | Returns true if all went well, false otherwise. */ | |
5360 | ||
5361 | static bool | |
5362 | read_debug_names_from_section (struct objfile *objfile, | |
5363 | const char *filename, | |
5364 | struct dwarf2_section_info *section, | |
5365 | mapped_debug_names &map) | |
5366 | { | |
5367 | if (dwarf2_section_empty_p (section)) | |
5368 | return false; | |
5369 | ||
5370 | /* Older elfutils strip versions could keep the section in the main | |
5371 | executable while splitting it for the separate debug info file. */ | |
5372 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
5373 | return false; | |
5374 | ||
5375 | dwarf2_read_section (objfile, section); | |
5376 | ||
5377 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
5378 | ||
5379 | const gdb_byte *addr = section->buffer; | |
5380 | ||
5381 | bfd *const abfd = get_section_bfd_owner (section); | |
5382 | ||
5383 | unsigned int bytes_read; | |
5384 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
5385 | addr += bytes_read; | |
5386 | ||
5387 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
5388 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
5389 | if (bytes_read + length != section->size) | |
5390 | { | |
5391 | /* There may be multiple per-CU indices. */ | |
5392 | warning (_("Section .debug_names in %s length %s does not match " | |
5393 | "section length %s, ignoring .debug_names."), | |
5394 | filename, plongest (bytes_read + length), | |
5395 | pulongest (section->size)); | |
5396 | return false; | |
5397 | } | |
5398 | ||
5399 | /* The version number. */ | |
5400 | uint16_t version = read_2_bytes (abfd, addr); | |
5401 | addr += 2; | |
5402 | if (version != 5) | |
5403 | { | |
5404 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
5405 | "ignoring .debug_names."), | |
5406 | filename, version); | |
5407 | return false; | |
5408 | } | |
5409 | ||
5410 | /* Padding. */ | |
5411 | uint16_t padding = read_2_bytes (abfd, addr); | |
5412 | addr += 2; | |
5413 | if (padding != 0) | |
5414 | { | |
5415 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
5416 | "ignoring .debug_names."), | |
5417 | filename, padding); | |
5418 | return false; | |
5419 | } | |
5420 | ||
5421 | /* comp_unit_count - The number of CUs in the CU list. */ | |
5422 | map.cu_count = read_4_bytes (abfd, addr); | |
5423 | addr += 4; | |
5424 | ||
5425 | /* local_type_unit_count - The number of TUs in the local TU | |
5426 | list. */ | |
5427 | map.tu_count = read_4_bytes (abfd, addr); | |
5428 | addr += 4; | |
5429 | ||
5430 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
5431 | list. */ | |
5432 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
5433 | addr += 4; | |
5434 | if (foreign_tu_count != 0) | |
5435 | { | |
5436 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
5437 | "ignoring .debug_names."), | |
5438 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
5439 | return false; | |
5440 | } | |
5441 | ||
5442 | /* bucket_count - The number of hash buckets in the hash lookup | |
5443 | table. */ | |
5444 | map.bucket_count = read_4_bytes (abfd, addr); | |
5445 | addr += 4; | |
5446 | ||
5447 | /* name_count - The number of unique names in the index. */ | |
5448 | map.name_count = read_4_bytes (abfd, addr); | |
5449 | addr += 4; | |
5450 | ||
5451 | /* abbrev_table_size - The size in bytes of the abbreviations | |
5452 | table. */ | |
5453 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
5454 | addr += 4; | |
5455 | ||
5456 | /* augmentation_string_size - The size in bytes of the augmentation | |
5457 | string. This value is rounded up to a multiple of 4. */ | |
5458 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
5459 | addr += 4; | |
5460 | map.augmentation_is_gdb = ((augmentation_string_size | |
5461 | == sizeof (dwarf5_augmentation)) | |
5462 | && memcmp (addr, dwarf5_augmentation, | |
5463 | sizeof (dwarf5_augmentation)) == 0); | |
5464 | augmentation_string_size += (-augmentation_string_size) & 3; | |
5465 | addr += augmentation_string_size; | |
5466 | ||
5467 | /* List of CUs */ | |
5468 | map.cu_table_reordered = addr; | |
5469 | addr += map.cu_count * map.offset_size; | |
5470 | ||
5471 | /* List of Local TUs */ | |
5472 | map.tu_table_reordered = addr; | |
5473 | addr += map.tu_count * map.offset_size; | |
5474 | ||
5475 | /* Hash Lookup Table */ | |
5476 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5477 | addr += map.bucket_count * 4; | |
5478 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5479 | addr += map.name_count * 4; | |
5480 | ||
5481 | /* Name Table */ | |
5482 | map.name_table_string_offs_reordered = addr; | |
5483 | addr += map.name_count * map.offset_size; | |
5484 | map.name_table_entry_offs_reordered = addr; | |
5485 | addr += map.name_count * map.offset_size; | |
5486 | ||
5487 | const gdb_byte *abbrev_table_start = addr; | |
5488 | for (;;) | |
5489 | { | |
5490 | unsigned int bytes_read; | |
5491 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5492 | addr += bytes_read; | |
5493 | if (index_num == 0) | |
5494 | break; | |
5495 | ||
5496 | const auto insertpair | |
5497 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
5498 | if (!insertpair.second) | |
5499 | { | |
5500 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
5501 | "ignoring .debug_names."), | |
5502 | filename, pulongest (index_num)); | |
5503 | return false; | |
5504 | } | |
5505 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
5506 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5507 | addr += bytes_read; | |
5508 | ||
5509 | for (;;) | |
5510 | { | |
5511 | mapped_debug_names::index_val::attr attr; | |
5512 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5513 | addr += bytes_read; | |
5514 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5515 | addr += bytes_read; | |
5516 | if (attr.form == DW_FORM_implicit_const) | |
5517 | { | |
5518 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
5519 | &bytes_read); | |
5520 | addr += bytes_read; | |
5521 | } | |
5522 | if (attr.dw_idx == 0 && attr.form == 0) | |
5523 | break; | |
5524 | indexval.attr_vec.push_back (std::move (attr)); | |
5525 | } | |
5526 | } | |
5527 | if (addr != abbrev_table_start + abbrev_table_size) | |
5528 | { | |
5529 | warning (_("Section .debug_names in %s has abbreviation_table " | |
5530 | "of size %zu vs. written as %u, ignoring .debug_names."), | |
5531 | filename, addr - abbrev_table_start, abbrev_table_size); | |
5532 | return false; | |
5533 | } | |
5534 | map.entry_pool = addr; | |
5535 | ||
5536 | return true; | |
5537 | } | |
5538 | ||
5539 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5540 | list. */ | |
5541 | ||
5542 | static void | |
ed2dc618 | 5543 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5544 | const mapped_debug_names &map, |
5545 | dwarf2_section_info §ion, | |
b76e467d | 5546 | bool is_dwz) |
927aa2e7 JK |
5547 | { |
5548 | sect_offset sect_off_prev; | |
5549 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5550 | { | |
5551 | sect_offset sect_off_next; | |
5552 | if (i < map.cu_count) | |
5553 | { | |
5554 | sect_off_next | |
5555 | = (sect_offset) (extract_unsigned_integer | |
5556 | (map.cu_table_reordered + i * map.offset_size, | |
5557 | map.offset_size, | |
5558 | map.dwarf5_byte_order)); | |
5559 | } | |
5560 | else | |
5561 | sect_off_next = (sect_offset) section.size; | |
5562 | if (i >= 1) | |
5563 | { | |
5564 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5565 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5566 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5567 | sect_off_prev, length); |
b76e467d | 5568 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5569 | } |
5570 | sect_off_prev = sect_off_next; | |
5571 | } | |
5572 | } | |
5573 | ||
5574 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5575 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5576 | |
5577 | static void | |
ed2dc618 | 5578 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5579 | const mapped_debug_names &map, |
5580 | const mapped_debug_names &dwz_map) | |
5581 | { | |
b76e467d SM |
5582 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5583 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5584 | |
ed2dc618 SM |
5585 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5586 | dwarf2_per_objfile->info, | |
b76e467d | 5587 | false /* is_dwz */); |
927aa2e7 JK |
5588 | |
5589 | if (dwz_map.cu_count == 0) | |
5590 | return; | |
5591 | ||
ed2dc618 SM |
5592 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5593 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5594 | true /* is_dwz */); |
927aa2e7 JK |
5595 | } |
5596 | ||
5597 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5598 | elements of all the CUs and return true. Otherwise, return false. */ | |
5599 | ||
5600 | static bool | |
ed2dc618 | 5601 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5602 | { |
22ca247e TT |
5603 | std::unique_ptr<mapped_debug_names> map |
5604 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5605 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5606 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5607 | |
5608 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5609 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5610 | *map)) |
927aa2e7 JK |
5611 | return false; |
5612 | ||
5613 | /* Don't use the index if it's empty. */ | |
22ca247e | 5614 | if (map->name_count == 0) |
927aa2e7 JK |
5615 | return false; |
5616 | ||
5617 | /* If there is a .dwz file, read it so we can get its CU list as | |
5618 | well. */ | |
ed2dc618 | 5619 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5620 | if (dwz != NULL) |
5621 | { | |
5622 | if (!read_debug_names_from_section (objfile, | |
5623 | bfd_get_filename (dwz->dwz_bfd), | |
5624 | &dwz->debug_names, dwz_map)) | |
5625 | { | |
5626 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
5627 | bfd_get_filename (dwz->dwz_bfd)); | |
5628 | return false; | |
5629 | } | |
5630 | } | |
5631 | ||
22ca247e | 5632 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5633 | |
22ca247e | 5634 | if (map->tu_count != 0) |
927aa2e7 JK |
5635 | { |
5636 | /* We can only handle a single .debug_types when we have an | |
5637 | index. */ | |
5638 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
5639 | return false; | |
5640 | ||
5641 | dwarf2_section_info *section = VEC_index (dwarf2_section_info_def, | |
5642 | dwarf2_per_objfile->types, 0); | |
5643 | ||
5644 | create_signatured_type_table_from_debug_names | |
22ca247e | 5645 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5646 | } |
5647 | ||
ed2dc618 SM |
5648 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5649 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5650 | |
22ca247e | 5651 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5652 | dwarf2_per_objfile->using_index = 1; |
5653 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5654 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5655 | |
5656 | return true; | |
5657 | } | |
5658 | ||
927aa2e7 JK |
5659 | /* Type used to manage iterating over all CUs looking for a symbol for |
5660 | .debug_names. */ | |
5661 | ||
5662 | class dw2_debug_names_iterator | |
5663 | { | |
5664 | public: | |
5665 | /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block | |
5666 | BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
5667 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5668 | bool want_specific_block, | |
5669 | block_enum block_index, domain_enum domain, | |
5670 | const char *name) | |
5671 | : m_map (map), m_want_specific_block (want_specific_block), | |
5672 | m_block_index (block_index), m_domain (domain), | |
5673 | m_addr (find_vec_in_debug_names (map, name)) | |
5674 | {} | |
5675 | ||
5676 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5677 | search_domain search, uint32_t namei) | |
5678 | : m_map (map), | |
5679 | m_search (search), | |
5680 | m_addr (find_vec_in_debug_names (map, namei)) | |
5681 | {} | |
5682 | ||
5683 | /* Return the next matching CU or NULL if there are no more. */ | |
5684 | dwarf2_per_cu_data *next (); | |
5685 | ||
5686 | private: | |
5687 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5688 | const char *name); | |
5689 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5690 | uint32_t namei); | |
5691 | ||
5692 | /* The internalized form of .debug_names. */ | |
5693 | const mapped_debug_names &m_map; | |
5694 | ||
5695 | /* If true, only look for symbols that match BLOCK_INDEX. */ | |
5696 | const bool m_want_specific_block = false; | |
5697 | ||
5698 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
5699 | Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid | |
5700 | value. */ | |
5701 | const block_enum m_block_index = FIRST_LOCAL_BLOCK; | |
5702 | ||
5703 | /* The kind of symbol we're looking for. */ | |
5704 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5705 | const search_domain m_search = ALL_DOMAIN; | |
5706 | ||
5707 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5708 | not found. */ | |
5709 | const gdb_byte *m_addr; | |
5710 | }; | |
5711 | ||
5712 | const char * | |
5713 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5714 | { | |
5715 | const ULONGEST namei_string_offs | |
5716 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5717 | + namei * offset_size), | |
5718 | offset_size, | |
5719 | dwarf5_byte_order); | |
5720 | return read_indirect_string_at_offset | |
ed2dc618 | 5721 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5722 | } |
5723 | ||
5724 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5725 | found, return pointer to its pool data. If NAME cannot be found, | |
5726 | return NULL. */ | |
5727 | ||
5728 | const gdb_byte * | |
5729 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5730 | (const mapped_debug_names &map, const char *name) | |
5731 | { | |
5732 | int (*cmp) (const char *, const char *); | |
5733 | ||
5734 | if (current_language->la_language == language_cplus | |
5735 | || current_language->la_language == language_fortran | |
5736 | || current_language->la_language == language_d) | |
5737 | { | |
5738 | /* NAME is already canonical. Drop any qualifiers as | |
5739 | .debug_names does not contain any. */ | |
5740 | ||
5741 | if (strchr (name, '(') != NULL) | |
5742 | { | |
5743 | gdb::unique_xmalloc_ptr<char> without_params | |
5744 | = cp_remove_params (name); | |
5745 | ||
5746 | if (without_params != NULL) | |
5747 | { | |
5748 | name = without_params.get(); | |
5749 | } | |
5750 | } | |
5751 | } | |
5752 | ||
5753 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5754 | ||
5755 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5756 | uint32_t namei | |
5757 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5758 | (map.bucket_table_reordered | |
5759 | + (full_hash % map.bucket_count)), 4, | |
5760 | map.dwarf5_byte_order); | |
5761 | if (namei == 0) | |
5762 | return NULL; | |
5763 | --namei; | |
5764 | if (namei >= map.name_count) | |
5765 | { | |
b98664d3 | 5766 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5767 | "[in module %s]"), |
5768 | namei, map.name_count, | |
ed2dc618 | 5769 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5770 | return NULL; |
5771 | } | |
5772 | ||
5773 | for (;;) | |
5774 | { | |
5775 | const uint32_t namei_full_hash | |
5776 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5777 | (map.hash_table_reordered + namei), 4, | |
5778 | map.dwarf5_byte_order); | |
5779 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5780 | return NULL; | |
5781 | ||
5782 | if (full_hash == namei_full_hash) | |
5783 | { | |
5784 | const char *const namei_string = map.namei_to_name (namei); | |
5785 | ||
5786 | #if 0 /* An expensive sanity check. */ | |
5787 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5788 | { | |
b98664d3 | 5789 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5790 | "[in module %s]"), |
5791 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5792 | return NULL; | |
5793 | } | |
5794 | #endif | |
5795 | ||
5796 | if (cmp (namei_string, name) == 0) | |
5797 | { | |
5798 | const ULONGEST namei_entry_offs | |
5799 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5800 | + namei * map.offset_size), | |
5801 | map.offset_size, map.dwarf5_byte_order); | |
5802 | return map.entry_pool + namei_entry_offs; | |
5803 | } | |
5804 | } | |
5805 | ||
5806 | ++namei; | |
5807 | if (namei >= map.name_count) | |
5808 | return NULL; | |
5809 | } | |
5810 | } | |
5811 | ||
5812 | const gdb_byte * | |
5813 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5814 | (const mapped_debug_names &map, uint32_t namei) | |
5815 | { | |
5816 | if (namei >= map.name_count) | |
5817 | { | |
b98664d3 | 5818 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5819 | "[in module %s]"), |
5820 | namei, map.name_count, | |
ed2dc618 | 5821 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5822 | return NULL; |
5823 | } | |
5824 | ||
5825 | const ULONGEST namei_entry_offs | |
5826 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5827 | + namei * map.offset_size), | |
5828 | map.offset_size, map.dwarf5_byte_order); | |
5829 | return map.entry_pool + namei_entry_offs; | |
5830 | } | |
5831 | ||
5832 | /* See dw2_debug_names_iterator. */ | |
5833 | ||
5834 | dwarf2_per_cu_data * | |
5835 | dw2_debug_names_iterator::next () | |
5836 | { | |
5837 | if (m_addr == NULL) | |
5838 | return NULL; | |
5839 | ||
ed2dc618 SM |
5840 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5841 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5842 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5843 | |
5844 | again: | |
5845 | ||
5846 | unsigned int bytes_read; | |
5847 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5848 | m_addr += bytes_read; | |
5849 | if (abbrev == 0) | |
5850 | return NULL; | |
5851 | ||
5852 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5853 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5854 | { | |
b98664d3 | 5855 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5856 | "[in module %s]"), |
ed2dc618 | 5857 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5858 | return NULL; |
5859 | } | |
5860 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
5861 | bool have_is_static = false; | |
5862 | bool is_static; | |
5863 | dwarf2_per_cu_data *per_cu = NULL; | |
5864 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5865 | { | |
5866 | ULONGEST ull; | |
5867 | switch (attr.form) | |
5868 | { | |
5869 | case DW_FORM_implicit_const: | |
5870 | ull = attr.implicit_const; | |
5871 | break; | |
5872 | case DW_FORM_flag_present: | |
5873 | ull = 1; | |
5874 | break; | |
5875 | case DW_FORM_udata: | |
5876 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5877 | m_addr += bytes_read; | |
5878 | break; | |
5879 | default: | |
b98664d3 | 5880 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5881 | dwarf_form_name (attr.form), |
ed2dc618 | 5882 | objfile_name (objfile)); |
927aa2e7 JK |
5883 | return NULL; |
5884 | } | |
5885 | switch (attr.dw_idx) | |
5886 | { | |
5887 | case DW_IDX_compile_unit: | |
5888 | /* Don't crash on bad data. */ | |
b76e467d | 5889 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5890 | { |
b98664d3 | 5891 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5892 | " [in module %s]"), |
5893 | pulongest (ull), | |
5894 | objfile_name (dwarf2_per_objfile->objfile)); | |
5895 | continue; | |
5896 | } | |
ff4c9fec | 5897 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5898 | break; |
8af5c486 JK |
5899 | case DW_IDX_type_unit: |
5900 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5901 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5902 | { |
b98664d3 | 5903 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5904 | " [in module %s]"), |
5905 | pulongest (ull), | |
5906 | objfile_name (dwarf2_per_objfile->objfile)); | |
5907 | continue; | |
5908 | } | |
ff4c9fec | 5909 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5910 | break; |
927aa2e7 JK |
5911 | case DW_IDX_GNU_internal: |
5912 | if (!m_map.augmentation_is_gdb) | |
5913 | break; | |
5914 | have_is_static = true; | |
5915 | is_static = true; | |
5916 | break; | |
5917 | case DW_IDX_GNU_external: | |
5918 | if (!m_map.augmentation_is_gdb) | |
5919 | break; | |
5920 | have_is_static = true; | |
5921 | is_static = false; | |
5922 | break; | |
5923 | } | |
5924 | } | |
5925 | ||
5926 | /* Skip if already read in. */ | |
5927 | if (per_cu->v.quick->compunit_symtab) | |
5928 | goto again; | |
5929 | ||
5930 | /* Check static vs global. */ | |
5931 | if (have_is_static) | |
5932 | { | |
5933 | const bool want_static = m_block_index != GLOBAL_BLOCK; | |
5934 | if (m_want_specific_block && want_static != is_static) | |
5935 | goto again; | |
5936 | } | |
5937 | ||
5938 | /* Match dw2_symtab_iter_next, symbol_kind | |
5939 | and debug_names::psymbol_tag. */ | |
5940 | switch (m_domain) | |
5941 | { | |
5942 | case VAR_DOMAIN: | |
5943 | switch (indexval.dwarf_tag) | |
5944 | { | |
5945 | case DW_TAG_variable: | |
5946 | case DW_TAG_subprogram: | |
5947 | /* Some types are also in VAR_DOMAIN. */ | |
5948 | case DW_TAG_typedef: | |
5949 | case DW_TAG_structure_type: | |
5950 | break; | |
5951 | default: | |
5952 | goto again; | |
5953 | } | |
5954 | break; | |
5955 | case STRUCT_DOMAIN: | |
5956 | switch (indexval.dwarf_tag) | |
5957 | { | |
5958 | case DW_TAG_typedef: | |
5959 | case DW_TAG_structure_type: | |
5960 | break; | |
5961 | default: | |
5962 | goto again; | |
5963 | } | |
5964 | break; | |
5965 | case LABEL_DOMAIN: | |
5966 | switch (indexval.dwarf_tag) | |
5967 | { | |
5968 | case 0: | |
5969 | case DW_TAG_variable: | |
5970 | break; | |
5971 | default: | |
5972 | goto again; | |
5973 | } | |
5974 | break; | |
5975 | default: | |
5976 | break; | |
5977 | } | |
5978 | ||
5979 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5980 | debug_names::psymbol_tag. */ | |
5981 | switch (m_search) | |
4b514bc8 | 5982 | { |
927aa2e7 JK |
5983 | case VARIABLES_DOMAIN: |
5984 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5985 | { |
927aa2e7 JK |
5986 | case DW_TAG_variable: |
5987 | break; | |
5988 | default: | |
5989 | goto again; | |
4b514bc8 | 5990 | } |
927aa2e7 JK |
5991 | break; |
5992 | case FUNCTIONS_DOMAIN: | |
5993 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5994 | { |
927aa2e7 JK |
5995 | case DW_TAG_subprogram: |
5996 | break; | |
5997 | default: | |
5998 | goto again; | |
4b514bc8 | 5999 | } |
927aa2e7 JK |
6000 | break; |
6001 | case TYPES_DOMAIN: | |
6002 | switch (indexval.dwarf_tag) | |
6003 | { | |
6004 | case DW_TAG_typedef: | |
6005 | case DW_TAG_structure_type: | |
6006 | break; | |
6007 | default: | |
6008 | goto again; | |
6009 | } | |
6010 | break; | |
6011 | default: | |
6012 | break; | |
4b514bc8 | 6013 | } |
927aa2e7 JK |
6014 | |
6015 | return per_cu; | |
4b514bc8 | 6016 | } |
61920122 | 6017 | |
927aa2e7 JK |
6018 | static struct compunit_symtab * |
6019 | dw2_debug_names_lookup_symbol (struct objfile *objfile, int block_index_int, | |
6020 | const char *name, domain_enum domain) | |
4b514bc8 | 6021 | { |
927aa2e7 | 6022 | const block_enum block_index = static_cast<block_enum> (block_index_int); |
ed2dc618 SM |
6023 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6024 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 6025 | |
927aa2e7 JK |
6026 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
6027 | if (!mapp) | |
61920122 | 6028 | { |
927aa2e7 JK |
6029 | /* index is NULL if OBJF_READNOW. */ |
6030 | return NULL; | |
6031 | } | |
6032 | const auto &map = *mapp; | |
9291a0cd | 6033 | |
927aa2e7 JK |
6034 | dw2_debug_names_iterator iter (map, true /* want_specific_block */, |
6035 | block_index, domain, name); | |
9703b513 | 6036 | |
927aa2e7 JK |
6037 | struct compunit_symtab *stab_best = NULL; |
6038 | struct dwarf2_per_cu_data *per_cu; | |
6039 | while ((per_cu = iter.next ()) != NULL) | |
6040 | { | |
6041 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 6042 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
6043 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
6044 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
9703b513 | 6045 | |
927aa2e7 JK |
6046 | sym = block_find_symbol (block, name, domain, |
6047 | block_find_non_opaque_type_preferred, | |
6048 | &with_opaque); | |
9703b513 | 6049 | |
927aa2e7 JK |
6050 | /* Some caution must be observed with overloaded functions and |
6051 | methods, since the index will not contain any overload | |
6052 | information (but NAME might contain it). */ | |
a3ec0bb1 | 6053 | |
927aa2e7 JK |
6054 | if (sym != NULL |
6055 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
6056 | return stab; | |
6057 | if (with_opaque != NULL | |
6058 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
6059 | stab_best = stab; | |
9703b513 | 6060 | |
927aa2e7 | 6061 | /* Keep looking through other CUs. */ |
9703b513 TT |
6062 | } |
6063 | ||
927aa2e7 | 6064 | return stab_best; |
9703b513 TT |
6065 | } |
6066 | ||
927aa2e7 JK |
6067 | /* This dumps minimal information about .debug_names. It is called |
6068 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
6069 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 6070 | |
927aa2e7 JK |
6071 | static void |
6072 | dw2_debug_names_dump (struct objfile *objfile) | |
6073 | { | |
ed2dc618 SM |
6074 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6075 | = get_dwarf2_per_objfile (objfile); | |
6076 | ||
927aa2e7 JK |
6077 | gdb_assert (dwarf2_per_objfile->using_index); |
6078 | printf_filtered (".debug_names:"); | |
6079 | if (dwarf2_per_objfile->debug_names_table) | |
6080 | printf_filtered (" exists\n"); | |
6081 | else | |
6082 | printf_filtered (" faked for \"readnow\"\n"); | |
6083 | printf_filtered ("\n"); | |
9291a0cd TT |
6084 | } |
6085 | ||
9291a0cd | 6086 | static void |
927aa2e7 JK |
6087 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
6088 | const char *func_name) | |
9291a0cd | 6089 | { |
ed2dc618 SM |
6090 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6091 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 6092 | |
927aa2e7 JK |
6093 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
6094 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 6095 | { |
927aa2e7 | 6096 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 6097 | |
927aa2e7 JK |
6098 | /* Note: It doesn't matter what we pass for block_index here. */ |
6099 | dw2_debug_names_iterator iter (map, false /* want_specific_block */, | |
6100 | GLOBAL_BLOCK, VAR_DOMAIN, func_name); | |
24c79950 | 6101 | |
927aa2e7 JK |
6102 | struct dwarf2_per_cu_data *per_cu; |
6103 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 6104 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
6105 | } |
6106 | } | |
24c79950 | 6107 | |
927aa2e7 JK |
6108 | static void |
6109 | dw2_debug_names_expand_symtabs_matching | |
6110 | (struct objfile *objfile, | |
6111 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
6112 | const lookup_name_info &lookup_name, | |
6113 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
6114 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
6115 | enum search_domain kind) | |
6116 | { | |
ed2dc618 SM |
6117 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6118 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 6119 | |
927aa2e7 JK |
6120 | /* debug_names_table is NULL if OBJF_READNOW. */ |
6121 | if (!dwarf2_per_objfile->debug_names_table) | |
6122 | return; | |
9291a0cd | 6123 | |
ed2dc618 | 6124 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 6125 | |
44ed8f3e | 6126 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 6127 | |
44ed8f3e PA |
6128 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
6129 | symbol_matcher, | |
6130 | kind, [&] (offset_type namei) | |
927aa2e7 | 6131 | { |
927aa2e7 JK |
6132 | /* The name was matched, now expand corresponding CUs that were |
6133 | marked. */ | |
6134 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 6135 | |
927aa2e7 JK |
6136 | struct dwarf2_per_cu_data *per_cu; |
6137 | while ((per_cu = iter.next ()) != NULL) | |
6138 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
6139 | expansion_notify); | |
44ed8f3e | 6140 | }); |
9291a0cd TT |
6141 | } |
6142 | ||
927aa2e7 | 6143 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
6144 | { |
6145 | dw2_has_symbols, | |
6146 | dw2_find_last_source_symtab, | |
6147 | dw2_forget_cached_source_info, | |
f8eba3c6 | 6148 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 6149 | dw2_debug_names_lookup_symbol, |
9291a0cd | 6150 | dw2_print_stats, |
927aa2e7 | 6151 | dw2_debug_names_dump, |
9291a0cd | 6152 | dw2_relocate, |
927aa2e7 | 6153 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 6154 | dw2_expand_all_symtabs, |
652a8996 | 6155 | dw2_expand_symtabs_with_fullname, |
40658b94 | 6156 | dw2_map_matching_symbols, |
927aa2e7 | 6157 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 6158 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 6159 | NULL, |
9291a0cd TT |
6160 | dw2_map_symbol_filenames |
6161 | }; | |
6162 | ||
3c0aa29a | 6163 | /* See symfile.h. */ |
9291a0cd | 6164 | |
3c0aa29a PA |
6165 | bool |
6166 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 6167 | { |
ed2dc618 SM |
6168 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6169 | = get_dwarf2_per_objfile (objfile); | |
6170 | ||
9291a0cd TT |
6171 | /* If we're about to read full symbols, don't bother with the |
6172 | indices. In this case we also don't care if some other debug | |
6173 | format is making psymtabs, because they are all about to be | |
6174 | expanded anyway. */ | |
6175 | if ((objfile->flags & OBJF_READNOW)) | |
6176 | { | |
9291a0cd | 6177 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
6178 | create_all_comp_units (dwarf2_per_objfile); |
6179 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
6180 | dwarf2_per_objfile->quick_file_names_table |
6181 | = create_quick_file_names_table | |
6182 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 6183 | |
b76e467d | 6184 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 6185 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 6186 | { |
ff4c9fec | 6187 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 6188 | |
e254ef6a DE |
6189 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6190 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
6191 | } |
6192 | ||
6193 | /* Return 1 so that gdb sees the "quick" functions. However, | |
6194 | these functions will be no-ops because we will have expanded | |
6195 | all symtabs. */ | |
3c0aa29a PA |
6196 | *index_kind = dw_index_kind::GDB_INDEX; |
6197 | return true; | |
9291a0cd TT |
6198 | } |
6199 | ||
ed2dc618 | 6200 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
6201 | { |
6202 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
6203 | return true; | |
6204 | } | |
927aa2e7 | 6205 | |
7b23e087 | 6206 | if (dwarf2_read_gdb_index (dwarf2_per_objfile)) |
3c0aa29a PA |
6207 | { |
6208 | *index_kind = dw_index_kind::GDB_INDEX; | |
6209 | return true; | |
6210 | } | |
9291a0cd | 6211 | |
3c0aa29a | 6212 | return false; |
9291a0cd TT |
6213 | } |
6214 | ||
6215 | \f | |
6216 | ||
dce234bc PP |
6217 | /* Build a partial symbol table. */ |
6218 | ||
6219 | void | |
f29dff0a | 6220 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 6221 | { |
ed2dc618 SM |
6222 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6223 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 6224 | |
af5bf4ad SM |
6225 | if (objfile->global_psymbols.capacity () == 0 |
6226 | && objfile->static_psymbols.capacity () == 0) | |
6227 | init_psymbol_list (objfile, 1024); | |
c906108c | 6228 | |
492d29ea | 6229 | TRY |
c9bf0622 TT |
6230 | { |
6231 | /* This isn't really ideal: all the data we allocate on the | |
6232 | objfile's obstack is still uselessly kept around. However, | |
6233 | freeing it seems unsafe. */ | |
906768f9 | 6234 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 6235 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 6236 | psymtabs.keep (); |
c9bf0622 | 6237 | } |
492d29ea PA |
6238 | CATCH (except, RETURN_MASK_ERROR) |
6239 | { | |
6240 | exception_print (gdb_stderr, except); | |
6241 | } | |
6242 | END_CATCH | |
c906108c | 6243 | } |
c906108c | 6244 | |
1ce1cefd DE |
6245 | /* Return the total length of the CU described by HEADER. */ |
6246 | ||
6247 | static unsigned int | |
6248 | get_cu_length (const struct comp_unit_head *header) | |
6249 | { | |
6250 | return header->initial_length_size + header->length; | |
6251 | } | |
6252 | ||
9c541725 | 6253 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 6254 | |
9c541725 PA |
6255 | static inline bool |
6256 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 6257 | { |
9c541725 PA |
6258 | sect_offset bottom = cu_header->sect_off; |
6259 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 6260 | |
9c541725 | 6261 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
6262 | } |
6263 | ||
3b80fe9b DE |
6264 | /* Find the base address of the compilation unit for range lists and |
6265 | location lists. It will normally be specified by DW_AT_low_pc. | |
6266 | In DWARF-3 draft 4, the base address could be overridden by | |
6267 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
6268 | compilation units with discontinuous ranges. */ | |
6269 | ||
6270 | static void | |
6271 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
6272 | { | |
6273 | struct attribute *attr; | |
6274 | ||
6275 | cu->base_known = 0; | |
6276 | cu->base_address = 0; | |
6277 | ||
6278 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
6279 | if (attr) | |
6280 | { | |
31aa7e4e | 6281 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6282 | cu->base_known = 1; |
6283 | } | |
6284 | else | |
6285 | { | |
6286 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
6287 | if (attr) | |
6288 | { | |
31aa7e4e | 6289 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6290 | cu->base_known = 1; |
6291 | } | |
6292 | } | |
6293 | } | |
6294 | ||
93311388 | 6295 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 6296 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
6297 | NOTE: This leaves members offset, first_die_offset to be filled in |
6298 | by the caller. */ | |
107d2387 | 6299 | |
d521ce57 | 6300 | static const gdb_byte * |
107d2387 | 6301 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
6302 | const gdb_byte *info_ptr, |
6303 | struct dwarf2_section_info *section, | |
6304 | rcuh_kind section_kind) | |
107d2387 AC |
6305 | { |
6306 | int signed_addr; | |
891d2f0b | 6307 | unsigned int bytes_read; |
43988095 JK |
6308 | const char *filename = get_section_file_name (section); |
6309 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
6310 | |
6311 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
6312 | cu_header->initial_length_size = bytes_read; | |
6313 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 6314 | info_ptr += bytes_read; |
107d2387 | 6315 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1ea5da02 TV |
6316 | if (cu_header->version < 2 || cu_header->version > 5) |
6317 | error (_("Dwarf Error: wrong version in compilation unit header " | |
6318 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), | |
6319 | cu_header->version, filename); | |
107d2387 | 6320 | info_ptr += 2; |
43988095 JK |
6321 | if (cu_header->version < 5) |
6322 | switch (section_kind) | |
6323 | { | |
6324 | case rcuh_kind::COMPILE: | |
6325 | cu_header->unit_type = DW_UT_compile; | |
6326 | break; | |
6327 | case rcuh_kind::TYPE: | |
6328 | cu_header->unit_type = DW_UT_type; | |
6329 | break; | |
6330 | default: | |
6331 | internal_error (__FILE__, __LINE__, | |
6332 | _("read_comp_unit_head: invalid section_kind")); | |
6333 | } | |
6334 | else | |
6335 | { | |
6336 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
6337 | (read_1_byte (abfd, info_ptr)); | |
6338 | info_ptr += 1; | |
6339 | switch (cu_header->unit_type) | |
6340 | { | |
6341 | case DW_UT_compile: | |
6342 | if (section_kind != rcuh_kind::COMPILE) | |
6343 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
6344 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
6345 | filename); | |
6346 | break; | |
6347 | case DW_UT_type: | |
6348 | section_kind = rcuh_kind::TYPE; | |
6349 | break; | |
6350 | default: | |
6351 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
6352 | "(is %d, should be %d or %d) [in module %s]"), | |
6353 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
6354 | } | |
6355 | ||
6356 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6357 | info_ptr += 1; | |
6358 | } | |
9c541725 PA |
6359 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
6360 | cu_header, | |
6361 | &bytes_read); | |
613e1657 | 6362 | info_ptr += bytes_read; |
43988095 JK |
6363 | if (cu_header->version < 5) |
6364 | { | |
6365 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6366 | info_ptr += 1; | |
6367 | } | |
107d2387 AC |
6368 | signed_addr = bfd_get_sign_extend_vma (abfd); |
6369 | if (signed_addr < 0) | |
8e65ff28 | 6370 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6371 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 6372 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 6373 | |
43988095 JK |
6374 | if (section_kind == rcuh_kind::TYPE) |
6375 | { | |
6376 | LONGEST type_offset; | |
6377 | ||
6378 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
6379 | info_ptr += 8; | |
6380 | ||
6381 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
6382 | info_ptr += bytes_read; | |
9c541725 PA |
6383 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
6384 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
6385 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
6386 | "header (is %s) [in module %s]"), plongest (type_offset), | |
6387 | filename); | |
6388 | } | |
6389 | ||
107d2387 AC |
6390 | return info_ptr; |
6391 | } | |
6392 | ||
36586728 TT |
6393 | /* Helper function that returns the proper abbrev section for |
6394 | THIS_CU. */ | |
6395 | ||
6396 | static struct dwarf2_section_info * | |
6397 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
6398 | { | |
6399 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 6400 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
6401 | |
6402 | if (this_cu->is_dwz) | |
ed2dc618 | 6403 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
6404 | else |
6405 | abbrev = &dwarf2_per_objfile->abbrev; | |
6406 | ||
6407 | return abbrev; | |
6408 | } | |
6409 | ||
9ff913ba DE |
6410 | /* Subroutine of read_and_check_comp_unit_head and |
6411 | read_and_check_type_unit_head to simplify them. | |
6412 | Perform various error checking on the header. */ | |
6413 | ||
6414 | static void | |
ed2dc618 SM |
6415 | error_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6416 | struct comp_unit_head *header, | |
4bdcc0c1 DE |
6417 | struct dwarf2_section_info *section, |
6418 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 6419 | { |
a32a8923 | 6420 | const char *filename = get_section_file_name (section); |
9ff913ba | 6421 | |
9c541725 | 6422 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 6423 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9d8780f0 SM |
6424 | error (_("Dwarf Error: bad offset (%s) in compilation unit header " |
6425 | "(offset %s + 6) [in module %s]"), | |
6426 | sect_offset_str (header->abbrev_sect_off), | |
6427 | sect_offset_str (header->sect_off), | |
9ff913ba DE |
6428 | filename); |
6429 | ||
9c541725 | 6430 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 6431 | avoid potential 32-bit overflow. */ |
9c541725 | 6432 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 6433 | > section->size) |
9c541725 | 6434 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
9d8780f0 SM |
6435 | "(offset %s + 0) [in module %s]"), |
6436 | header->length, sect_offset_str (header->sect_off), | |
9ff913ba DE |
6437 | filename); |
6438 | } | |
6439 | ||
6440 | /* Read in a CU/TU header and perform some basic error checking. | |
6441 | The contents of the header are stored in HEADER. | |
6442 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 6443 | |
d521ce57 | 6444 | static const gdb_byte * |
ed2dc618 SM |
6445 | read_and_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6446 | struct comp_unit_head *header, | |
9ff913ba | 6447 | struct dwarf2_section_info *section, |
4bdcc0c1 | 6448 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 6449 | const gdb_byte *info_ptr, |
43988095 | 6450 | rcuh_kind section_kind) |
72bf9492 | 6451 | { |
d521ce57 | 6452 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 6453 | |
9c541725 | 6454 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 6455 | |
43988095 | 6456 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 6457 | |
9c541725 | 6458 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 6459 | |
ed2dc618 SM |
6460 | error_check_comp_unit_head (dwarf2_per_objfile, header, section, |
6461 | abbrev_section); | |
9ff913ba DE |
6462 | |
6463 | return info_ptr; | |
348e048f DE |
6464 | } |
6465 | ||
f4dc4d17 DE |
6466 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
6467 | ||
6468 | static sect_offset | |
ed2dc618 SM |
6469 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6470 | struct dwarf2_section_info *section, | |
9c541725 | 6471 | sect_offset sect_off) |
f4dc4d17 | 6472 | { |
a32a8923 | 6473 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 6474 | const gdb_byte *info_ptr; |
ac298888 | 6475 | unsigned int initial_length_size, offset_size; |
43988095 | 6476 | uint16_t version; |
f4dc4d17 DE |
6477 | |
6478 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 6479 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 6480 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 6481 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
6482 | info_ptr += initial_length_size; |
6483 | ||
6484 | version = read_2_bytes (abfd, info_ptr); | |
6485 | info_ptr += 2; | |
6486 | if (version >= 5) | |
6487 | { | |
6488 | /* Skip unit type and address size. */ | |
6489 | info_ptr += 2; | |
6490 | } | |
6491 | ||
9c541725 | 6492 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
6493 | } |
6494 | ||
aaa75496 JB |
6495 | /* Allocate a new partial symtab for file named NAME and mark this new |
6496 | partial symtab as being an include of PST. */ | |
6497 | ||
6498 | static void | |
d521ce57 | 6499 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
6500 | struct objfile *objfile) |
6501 | { | |
6502 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
6503 | ||
fbd9ab74 JK |
6504 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6505 | { | |
6506 | /* It shares objfile->objfile_obstack. */ | |
6507 | subpst->dirname = pst->dirname; | |
6508 | } | |
6509 | ||
aaa75496 JB |
6510 | subpst->textlow = 0; |
6511 | subpst->texthigh = 0; | |
6512 | ||
8d749320 SM |
6513 | subpst->dependencies |
6514 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
6515 | subpst->dependencies[0] = pst; |
6516 | subpst->number_of_dependencies = 1; | |
6517 | ||
6518 | subpst->globals_offset = 0; | |
6519 | subpst->n_global_syms = 0; | |
6520 | subpst->statics_offset = 0; | |
6521 | subpst->n_static_syms = 0; | |
43f3e411 | 6522 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
6523 | subpst->read_symtab = pst->read_symtab; |
6524 | subpst->readin = 0; | |
6525 | ||
6526 | /* No private part is necessary for include psymtabs. This property | |
6527 | can be used to differentiate between such include psymtabs and | |
10b3939b | 6528 | the regular ones. */ |
58a9656e | 6529 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
6530 | } |
6531 | ||
6532 | /* Read the Line Number Program data and extract the list of files | |
6533 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6534 | partial symtab for each of these included files. */ |
aaa75496 JB |
6535 | |
6536 | static void | |
6537 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
6538 | struct die_info *die, |
6539 | struct partial_symtab *pst) | |
aaa75496 | 6540 | { |
fff8551c | 6541 | line_header_up lh; |
d85a05f0 | 6542 | struct attribute *attr; |
aaa75496 | 6543 | |
d85a05f0 DJ |
6544 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
6545 | if (attr) | |
9c541725 | 6546 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6547 | if (lh == NULL) |
6548 | return; /* No linetable, so no includes. */ | |
6549 | ||
c6da4cef | 6550 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 6551 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
6552 | } |
6553 | ||
348e048f | 6554 | static hashval_t |
52dc124a | 6555 | hash_signatured_type (const void *item) |
348e048f | 6556 | { |
9a3c8263 SM |
6557 | const struct signatured_type *sig_type |
6558 | = (const struct signatured_type *) item; | |
9a619af0 | 6559 | |
348e048f | 6560 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6561 | return sig_type->signature; |
348e048f DE |
6562 | } |
6563 | ||
6564 | static int | |
52dc124a | 6565 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6566 | { |
9a3c8263 SM |
6567 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6568 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6569 | |
348e048f DE |
6570 | return lhs->signature == rhs->signature; |
6571 | } | |
6572 | ||
1fd400ff TT |
6573 | /* Allocate a hash table for signatured types. */ |
6574 | ||
6575 | static htab_t | |
673bfd45 | 6576 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
6577 | { |
6578 | return htab_create_alloc_ex (41, | |
52dc124a DE |
6579 | hash_signatured_type, |
6580 | eq_signatured_type, | |
1fd400ff TT |
6581 | NULL, |
6582 | &objfile->objfile_obstack, | |
6583 | hashtab_obstack_allocate, | |
6584 | dummy_obstack_deallocate); | |
6585 | } | |
6586 | ||
d467dd73 | 6587 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6588 | |
6589 | static int | |
d467dd73 | 6590 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6591 | { |
9a3c8263 | 6592 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6593 | std::vector<signatured_type *> *all_type_units |
6594 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6595 | |
b2bdb8cf | 6596 | all_type_units->push_back (sigt); |
1fd400ff TT |
6597 | |
6598 | return 1; | |
6599 | } | |
6600 | ||
78d4d2c5 | 6601 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6602 | and fill them into TYPES_HTAB. It will process only type units, |
6603 | therefore DW_UT_type. */ | |
c88ee1f0 | 6604 | |
78d4d2c5 | 6605 | static void |
ed2dc618 SM |
6606 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6607 | struct dwo_file *dwo_file, | |
43988095 JK |
6608 | dwarf2_section_info *section, htab_t &types_htab, |
6609 | rcuh_kind section_kind) | |
348e048f | 6610 | { |
3019eac3 | 6611 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6612 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6613 | bfd *abfd; |
6614 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6615 | |
4bdcc0c1 DE |
6616 | abbrev_section = (dwo_file != NULL |
6617 | ? &dwo_file->sections.abbrev | |
6618 | : &dwarf2_per_objfile->abbrev); | |
6619 | ||
b4f54984 | 6620 | if (dwarf_read_debug) |
43988095 JK |
6621 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
6622 | get_section_name (section), | |
a32a8923 | 6623 | get_section_file_name (abbrev_section)); |
09406207 | 6624 | |
78d4d2c5 JK |
6625 | dwarf2_read_section (objfile, section); |
6626 | info_ptr = section->buffer; | |
348e048f | 6627 | |
78d4d2c5 JK |
6628 | if (info_ptr == NULL) |
6629 | return; | |
348e048f | 6630 | |
78d4d2c5 JK |
6631 | /* We can't set abfd until now because the section may be empty or |
6632 | not present, in which case the bfd is unknown. */ | |
6633 | abfd = get_section_bfd_owner (section); | |
348e048f | 6634 | |
78d4d2c5 JK |
6635 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
6636 | because we don't need to read any dies: the signature is in the | |
6637 | header. */ | |
3019eac3 | 6638 | |
78d4d2c5 JK |
6639 | end_ptr = info_ptr + section->size; |
6640 | while (info_ptr < end_ptr) | |
6641 | { | |
78d4d2c5 JK |
6642 | struct signatured_type *sig_type; |
6643 | struct dwo_unit *dwo_tu; | |
6644 | void **slot; | |
6645 | const gdb_byte *ptr = info_ptr; | |
6646 | struct comp_unit_head header; | |
6647 | unsigned int length; | |
8b70b953 | 6648 | |
9c541725 | 6649 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6650 | |
a49dd8dd JK |
6651 | /* Initialize it due to a false compiler warning. */ |
6652 | header.signature = -1; | |
9c541725 | 6653 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6654 | |
78d4d2c5 JK |
6655 | /* We need to read the type's signature in order to build the hash |
6656 | table, but we don't need anything else just yet. */ | |
348e048f | 6657 | |
ed2dc618 | 6658 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6659 | abbrev_section, ptr, section_kind); |
348e048f | 6660 | |
78d4d2c5 | 6661 | length = get_cu_length (&header); |
6caca83c | 6662 | |
78d4d2c5 JK |
6663 | /* Skip dummy type units. */ |
6664 | if (ptr >= info_ptr + length | |
43988095 JK |
6665 | || peek_abbrev_code (abfd, ptr) == 0 |
6666 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6667 | { |
6668 | info_ptr += length; | |
6669 | continue; | |
6670 | } | |
dee91e82 | 6671 | |
78d4d2c5 JK |
6672 | if (types_htab == NULL) |
6673 | { | |
6674 | if (dwo_file) | |
6675 | types_htab = allocate_dwo_unit_table (objfile); | |
6676 | else | |
6677 | types_htab = allocate_signatured_type_table (objfile); | |
6678 | } | |
8b70b953 | 6679 | |
78d4d2c5 JK |
6680 | if (dwo_file) |
6681 | { | |
6682 | sig_type = NULL; | |
6683 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6684 | struct dwo_unit); | |
6685 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6686 | dwo_tu->signature = header.signature; |
9c541725 | 6687 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6688 | dwo_tu->section = section; |
9c541725 | 6689 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6690 | dwo_tu->length = length; |
6691 | } | |
6692 | else | |
6693 | { | |
6694 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6695 | The real type_offset is in the DWO file. */ | |
6696 | dwo_tu = NULL; | |
6697 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6698 | struct signatured_type); | |
43988095 | 6699 | sig_type->signature = header.signature; |
9c541725 | 6700 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6701 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6702 | sig_type->per_cu.is_debug_types = 1; |
6703 | sig_type->per_cu.section = section; | |
9c541725 | 6704 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6705 | sig_type->per_cu.length = length; |
6706 | } | |
6707 | ||
6708 | slot = htab_find_slot (types_htab, | |
6709 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
6710 | INSERT); | |
6711 | gdb_assert (slot != NULL); | |
6712 | if (*slot != NULL) | |
6713 | { | |
9c541725 | 6714 | sect_offset dup_sect_off; |
0349ea22 | 6715 | |
3019eac3 DE |
6716 | if (dwo_file) |
6717 | { | |
78d4d2c5 JK |
6718 | const struct dwo_unit *dup_tu |
6719 | = (const struct dwo_unit *) *slot; | |
6720 | ||
9c541725 | 6721 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6722 | } |
6723 | else | |
6724 | { | |
78d4d2c5 JK |
6725 | const struct signatured_type *dup_tu |
6726 | = (const struct signatured_type *) *slot; | |
6727 | ||
9c541725 | 6728 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6729 | } |
8b70b953 | 6730 | |
b98664d3 | 6731 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6732 | " the entry at offset %s, signature %s"), |
6733 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6734 | hex_string (header.signature)); |
78d4d2c5 JK |
6735 | } |
6736 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6737 | |
78d4d2c5 | 6738 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6739 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6740 | sect_offset_str (sect_off), | |
43988095 | 6741 | hex_string (header.signature)); |
3019eac3 | 6742 | |
78d4d2c5 JK |
6743 | info_ptr += length; |
6744 | } | |
6745 | } | |
3019eac3 | 6746 | |
78d4d2c5 JK |
6747 | /* Create the hash table of all entries in the .debug_types |
6748 | (or .debug_types.dwo) section(s). | |
6749 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6750 | otherwise it is NULL. | |
b3c8eb43 | 6751 | |
78d4d2c5 | 6752 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6753 | |
78d4d2c5 | 6754 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6755 | |
78d4d2c5 | 6756 | static void |
ed2dc618 SM |
6757 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6758 | struct dwo_file *dwo_file, | |
78d4d2c5 JK |
6759 | VEC (dwarf2_section_info_def) *types, |
6760 | htab_t &types_htab) | |
6761 | { | |
6762 | int ix; | |
6763 | struct dwarf2_section_info *section; | |
6764 | ||
6765 | if (VEC_empty (dwarf2_section_info_def, types)) | |
6766 | return; | |
348e048f | 6767 | |
78d4d2c5 JK |
6768 | for (ix = 0; |
6769 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
6770 | ++ix) | |
ed2dc618 SM |
6771 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, section, |
6772 | types_htab, rcuh_kind::TYPE); | |
3019eac3 DE |
6773 | } |
6774 | ||
6775 | /* Create the hash table of all entries in the .debug_types section, | |
6776 | and initialize all_type_units. | |
6777 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6778 | otherwise non-zero. */ | |
6779 | ||
6780 | static int | |
ed2dc618 | 6781 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6782 | { |
78d4d2c5 | 6783 | htab_t types_htab = NULL; |
3019eac3 | 6784 | |
ed2dc618 SM |
6785 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6786 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6787 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6788 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6789 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6790 | if (types_htab == NULL) |
6791 | { | |
6792 | dwarf2_per_objfile->signatured_types = NULL; | |
6793 | return 0; | |
6794 | } | |
6795 | ||
348e048f DE |
6796 | dwarf2_per_objfile->signatured_types = types_htab; |
6797 | ||
b2bdb8cf SM |
6798 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
6799 | dwarf2_per_objfile->all_type_units.reserve (htab_elements (types_htab)); | |
6800 | ||
6801 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, | |
6802 | &dwarf2_per_objfile->all_type_units); | |
1fd400ff | 6803 | |
348e048f DE |
6804 | return 1; |
6805 | } | |
6806 | ||
6aa5f3a6 DE |
6807 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6808 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6809 | Otherwise we find one. */ | |
6810 | ||
6811 | static struct signatured_type * | |
ed2dc618 SM |
6812 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6813 | void **slot) | |
6aa5f3a6 DE |
6814 | { |
6815 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6816 | |
b2bdb8cf SM |
6817 | if (dwarf2_per_objfile->all_type_units.size () |
6818 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6819 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6820 | |
b2bdb8cf SM |
6821 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6822 | struct signatured_type); | |
6823 | ||
6824 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6825 | sig_type->signature = sig; |
6826 | sig_type->per_cu.is_debug_types = 1; | |
6827 | if (dwarf2_per_objfile->using_index) | |
6828 | { | |
6829 | sig_type->per_cu.v.quick = | |
6830 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6831 | struct dwarf2_per_cu_quick_data); | |
6832 | } | |
6833 | ||
6834 | if (slot == NULL) | |
6835 | { | |
6836 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6837 | sig_type, INSERT); | |
6838 | } | |
6839 | gdb_assert (*slot == NULL); | |
6840 | *slot = sig_type; | |
6841 | /* The rest of sig_type must be filled in by the caller. */ | |
6842 | return sig_type; | |
6843 | } | |
6844 | ||
a2ce51a0 DE |
6845 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6846 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6847 | ||
6848 | static void | |
ed2dc618 | 6849 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6850 | struct signatured_type *sig_entry, |
6851 | struct dwo_unit *dwo_entry) | |
6852 | { | |
7ee85ab1 | 6853 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6854 | gdb_assert (! sig_entry->per_cu.queued); |
6855 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6856 | if (dwarf2_per_objfile->using_index) |
6857 | { | |
6858 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6859 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6860 | } |
6861 | else | |
6862 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6863 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6864 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6865 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6866 | gdb_assert (sig_entry->dwo_unit == NULL); |
6867 | ||
6868 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6869 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6870 | sig_entry->per_cu.length = dwo_entry->length; |
6871 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6872 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6873 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6874 | sig_entry->dwo_unit = dwo_entry; | |
6875 | } | |
6876 | ||
6877 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6878 | If we haven't read the TU yet, create the signatured_type data structure |
6879 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6880 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6881 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6882 | containing that CU. Otherwise we could end up reading several other DWO | |
6883 | files (due to comdat folding) to process the transitive closure of all the | |
6884 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6885 | type signature that it needs. | |
a2ce51a0 DE |
6886 | We only do this for .gdb_index because in the psymtab case we already have |
6887 | to read all the DWOs to build the type unit groups. */ | |
6888 | ||
6889 | static struct signatured_type * | |
6890 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6891 | { | |
518817b3 SM |
6892 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6893 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6894 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6895 | struct dwo_file *dwo_file; | |
6896 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6897 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6898 | void **slot; |
a2ce51a0 DE |
6899 | |
6900 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6901 | ||
6aa5f3a6 DE |
6902 | /* If TU skeletons have been removed then we may not have read in any |
6903 | TUs yet. */ | |
6904 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6905 | { | |
6906 | dwarf2_per_objfile->signatured_types | |
6907 | = allocate_signatured_type_table (objfile); | |
6908 | } | |
a2ce51a0 DE |
6909 | |
6910 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6911 | Use the global signatured_types array to do our own comdat-folding |
6912 | of types. If this is the first time we're reading this TU, and | |
6913 | the TU has an entry in .gdb_index, replace the recorded data from | |
6914 | .gdb_index with this TU. */ | |
a2ce51a0 | 6915 | |
a2ce51a0 | 6916 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
6917 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
6918 | &find_sig_entry, INSERT); | |
9a3c8263 | 6919 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6920 | |
6921 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6922 | read. Don't reassign the global entry to point to this DWO if that's |
6923 | the case. Also note that if the TU is already being read, it may not | |
6924 | have come from a DWO, the program may be a mix of Fission-compiled | |
6925 | code and non-Fission-compiled code. */ | |
6926 | ||
6927 | /* Have we already tried to read this TU? | |
6928 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6929 | needn't exist in the global table yet). */ | |
6930 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6931 | return sig_entry; |
6932 | ||
6aa5f3a6 DE |
6933 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6934 | dwo_unit of the TU itself. */ | |
6935 | dwo_file = cu->dwo_unit->dwo_file; | |
6936 | ||
a2ce51a0 DE |
6937 | /* Ok, this is the first time we're reading this TU. */ |
6938 | if (dwo_file->tus == NULL) | |
6939 | return NULL; | |
6940 | find_dwo_entry.signature = sig; | |
9a3c8263 | 6941 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
6942 | if (dwo_entry == NULL) |
6943 | return NULL; | |
6944 | ||
6aa5f3a6 DE |
6945 | /* If the global table doesn't have an entry for this TU, add one. */ |
6946 | if (sig_entry == NULL) | |
ed2dc618 | 6947 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 6948 | |
ed2dc618 | 6949 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 6950 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6951 | return sig_entry; |
6952 | } | |
6953 | ||
a2ce51a0 DE |
6954 | /* Subroutine of lookup_signatured_type. |
6955 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6956 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6957 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6958 | |
6959 | static struct signatured_type * | |
6960 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6961 | { | |
518817b3 SM |
6962 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6963 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 | 6964 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ed2dc618 | 6965 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
6966 | struct dwo_unit *dwo_entry; |
6967 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6968 | void **slot; |
a2ce51a0 DE |
6969 | |
6970 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6971 | gdb_assert (dwp_file != NULL); | |
6972 | ||
6aa5f3a6 DE |
6973 | /* If TU skeletons have been removed then we may not have read in any |
6974 | TUs yet. */ | |
6975 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 6976 | { |
6aa5f3a6 DE |
6977 | dwarf2_per_objfile->signatured_types |
6978 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
6979 | } |
6980 | ||
6aa5f3a6 DE |
6981 | find_sig_entry.signature = sig; |
6982 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6983 | &find_sig_entry, INSERT); | |
9a3c8263 | 6984 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6985 | |
6986 | /* Have we already tried to read this TU? | |
6987 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6988 | needn't exist in the global table yet). */ | |
6989 | if (sig_entry != NULL) | |
6990 | return sig_entry; | |
6991 | ||
a2ce51a0 DE |
6992 | if (dwp_file->tus == NULL) |
6993 | return NULL; | |
ed2dc618 | 6994 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 6995 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
6996 | if (dwo_entry == NULL) |
6997 | return NULL; | |
6998 | ||
ed2dc618 SM |
6999 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
7000 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 7001 | |
a2ce51a0 DE |
7002 | return sig_entry; |
7003 | } | |
7004 | ||
380bca97 | 7005 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
7006 | Returns NULL if signature SIG is not present in the table. |
7007 | It is up to the caller to complain about this. */ | |
348e048f DE |
7008 | |
7009 | static struct signatured_type * | |
a2ce51a0 | 7010 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 7011 | { |
518817b3 SM |
7012 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7013 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 7014 | |
a2ce51a0 DE |
7015 | if (cu->dwo_unit |
7016 | && dwarf2_per_objfile->using_index) | |
7017 | { | |
7018 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
7019 | These cases require special processing. */ | |
ed2dc618 | 7020 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
7021 | return lookup_dwo_signatured_type (cu, sig); |
7022 | else | |
7023 | return lookup_dwp_signatured_type (cu, sig); | |
7024 | } | |
7025 | else | |
7026 | { | |
7027 | struct signatured_type find_entry, *entry; | |
348e048f | 7028 | |
a2ce51a0 DE |
7029 | if (dwarf2_per_objfile->signatured_types == NULL) |
7030 | return NULL; | |
7031 | find_entry.signature = sig; | |
9a3c8263 SM |
7032 | entry = ((struct signatured_type *) |
7033 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
7034 | return entry; |
7035 | } | |
348e048f | 7036 | } |
42e7ad6c DE |
7037 | \f |
7038 | /* Low level DIE reading support. */ | |
348e048f | 7039 | |
d85a05f0 DJ |
7040 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
7041 | ||
7042 | static void | |
7043 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 7044 | struct dwarf2_cu *cu, |
3019eac3 | 7045 | struct dwarf2_section_info *section, |
685af9cd TT |
7046 | struct dwo_file *dwo_file, |
7047 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 7048 | { |
fceca515 | 7049 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 7050 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 7051 | reader->cu = cu; |
3019eac3 | 7052 | reader->dwo_file = dwo_file; |
dee91e82 DE |
7053 | reader->die_section = section; |
7054 | reader->buffer = section->buffer; | |
f664829e | 7055 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 7056 | reader->comp_dir = NULL; |
685af9cd | 7057 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
7058 | } |
7059 | ||
b0c7bfa9 DE |
7060 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7061 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
7062 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
7063 | already. | |
7064 | ||
7065 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
7066 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
7067 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
7068 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
7069 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
7070 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
7071 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
7072 | are filled in with the info of the DIE from the DWO file. | |
685af9cd TT |
7073 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
7074 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
7075 | kept around for at least as long as *RESULT_READER. | |
7076 | ||
b0c7bfa9 DE |
7077 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
7078 | ||
7079 | static int | |
7080 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
7081 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 7082 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 7083 | const char *stub_comp_dir, |
b0c7bfa9 | 7084 | struct die_reader_specs *result_reader, |
d521ce57 | 7085 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 7086 | struct die_info **result_comp_unit_die, |
685af9cd TT |
7087 | int *result_has_children, |
7088 | abbrev_table_up *result_dwo_abbrev_table) | |
b0c7bfa9 | 7089 | { |
ed2dc618 | 7090 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
7091 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7092 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 7093 | bfd *abfd; |
d521ce57 | 7094 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
7095 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
7096 | int i,num_extra_attrs; | |
7097 | struct dwarf2_section_info *dwo_abbrev_section; | |
7098 | struct attribute *attr; | |
7099 | struct die_info *comp_unit_die; | |
7100 | ||
b0aeadb3 DE |
7101 | /* At most one of these may be provided. */ |
7102 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 7103 | |
b0c7bfa9 DE |
7104 | /* These attributes aren't processed until later: |
7105 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
7106 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
7107 | referenced later. However, these attributes are found in the stub | |
7108 | which we won't have later. In order to not impose this complication | |
7109 | on the rest of the code, we read them here and copy them to the | |
7110 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
7111 | |
7112 | stmt_list = NULL; | |
7113 | low_pc = NULL; | |
7114 | high_pc = NULL; | |
7115 | ranges = NULL; | |
7116 | comp_dir = NULL; | |
7117 | ||
7118 | if (stub_comp_unit_die != NULL) | |
7119 | { | |
7120 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
7121 | DWO file. */ | |
7122 | if (! this_cu->is_debug_types) | |
7123 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
7124 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
7125 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
7126 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
7127 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
7128 | ||
7129 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
7130 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
7131 | cu->addr_base = 0; | |
7132 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
7133 | if (attr) | |
7134 | cu->addr_base = DW_UNSND (attr); | |
7135 | ||
7136 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
7137 | We need the value before we can process DW_AT_ranges. */ | |
7138 | cu->ranges_base = 0; | |
7139 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
7140 | if (attr) | |
7141 | cu->ranges_base = DW_UNSND (attr); | |
7142 | } | |
a2ce51a0 DE |
7143 | else if (stub_comp_dir != NULL) |
7144 | { | |
7145 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 7146 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
7147 | comp_dir->name = DW_AT_comp_dir; |
7148 | comp_dir->form = DW_FORM_string; | |
7149 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
7150 | DW_STRING (comp_dir) = stub_comp_dir; | |
7151 | } | |
b0c7bfa9 DE |
7152 | |
7153 | /* Set up for reading the DWO CU/TU. */ | |
7154 | cu->dwo_unit = dwo_unit; | |
685af9cd | 7155 | dwarf2_section_info *section = dwo_unit->section; |
b0c7bfa9 | 7156 | dwarf2_read_section (objfile, section); |
a32a8923 | 7157 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
7158 | begin_info_ptr = info_ptr = (section->buffer |
7159 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 7160 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
7161 | |
7162 | if (this_cu->is_debug_types) | |
7163 | { | |
b0c7bfa9 DE |
7164 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
7165 | ||
ed2dc618 SM |
7166 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7167 | &cu->header, section, | |
b0c7bfa9 | 7168 | dwo_abbrev_section, |
43988095 | 7169 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 7170 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 7171 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
7172 | { |
7173 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 7174 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 7175 | hex_string (sig_type->signature), |
43988095 | 7176 | hex_string (cu->header.signature), |
9d8780f0 | 7177 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
7178 | bfd_get_filename (abfd)); |
7179 | } | |
9c541725 | 7180 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7181 | /* For DWOs coming from DWP files, we don't know the CU length |
7182 | nor the type's offset in the TU until now. */ | |
7183 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 7184 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
7185 | |
7186 | /* Establish the type offset that can be used to lookup the type. | |
7187 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
7188 | sig_type->type_offset_in_section |
7189 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
7190 | } |
7191 | else | |
7192 | { | |
ed2dc618 SM |
7193 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7194 | &cu->header, section, | |
b0c7bfa9 | 7195 | dwo_abbrev_section, |
43988095 | 7196 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 7197 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7198 | /* For DWOs coming from DWP files, we don't know the CU length |
7199 | until now. */ | |
7200 | dwo_unit->length = get_cu_length (&cu->header); | |
7201 | } | |
7202 | ||
685af9cd TT |
7203 | *result_dwo_abbrev_table |
7204 | = abbrev_table_read_table (dwarf2_per_objfile, dwo_abbrev_section, | |
7205 | cu->header.abbrev_sect_off); | |
7206 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, | |
7207 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
7208 | |
7209 | /* Read in the die, but leave space to copy over the attributes | |
7210 | from the stub. This has the benefit of simplifying the rest of | |
7211 | the code - all the work to maintain the illusion of a single | |
7212 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
7213 | num_extra_attrs = ((stmt_list != NULL) | |
7214 | + (low_pc != NULL) | |
7215 | + (high_pc != NULL) | |
7216 | + (ranges != NULL) | |
7217 | + (comp_dir != NULL)); | |
7218 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
7219 | result_has_children, num_extra_attrs); | |
7220 | ||
7221 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
7222 | comp_unit_die = *result_comp_unit_die; | |
7223 | i = comp_unit_die->num_attrs; | |
7224 | if (stmt_list != NULL) | |
7225 | comp_unit_die->attrs[i++] = *stmt_list; | |
7226 | if (low_pc != NULL) | |
7227 | comp_unit_die->attrs[i++] = *low_pc; | |
7228 | if (high_pc != NULL) | |
7229 | comp_unit_die->attrs[i++] = *high_pc; | |
7230 | if (ranges != NULL) | |
7231 | comp_unit_die->attrs[i++] = *ranges; | |
7232 | if (comp_dir != NULL) | |
7233 | comp_unit_die->attrs[i++] = *comp_dir; | |
7234 | comp_unit_die->num_attrs += num_extra_attrs; | |
7235 | ||
b4f54984 | 7236 | if (dwarf_die_debug) |
bf6af496 DE |
7237 | { |
7238 | fprintf_unfiltered (gdb_stdlog, | |
7239 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 7240 | get_section_name (section), |
bf6af496 DE |
7241 | (unsigned) (begin_info_ptr - section->buffer), |
7242 | bfd_get_filename (abfd)); | |
b4f54984 | 7243 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
7244 | } |
7245 | ||
a2ce51a0 DE |
7246 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
7247 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
7248 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
7249 | to get it via circuitous means. Blech. */ | |
7250 | if (comp_dir != NULL) | |
7251 | result_reader->comp_dir = DW_STRING (comp_dir); | |
7252 | ||
b0c7bfa9 DE |
7253 | /* Skip dummy compilation units. */ |
7254 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
7255 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
7256 | return 0; | |
7257 | ||
7258 | *result_info_ptr = info_ptr; | |
7259 | return 1; | |
7260 | } | |
7261 | ||
7262 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
7263 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 7264 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
7265 | |
7266 | static struct dwo_unit * | |
7267 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
7268 | struct die_info *comp_unit_die) | |
7269 | { | |
7270 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
7271 | ULONGEST signature; |
7272 | struct dwo_unit *dwo_unit; | |
7273 | const char *comp_dir, *dwo_name; | |
7274 | ||
a2ce51a0 DE |
7275 | gdb_assert (cu != NULL); |
7276 | ||
b0c7bfa9 | 7277 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
7278 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
7279 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
7280 | |
7281 | if (this_cu->is_debug_types) | |
7282 | { | |
7283 | struct signatured_type *sig_type; | |
7284 | ||
7285 | /* Since this_cu is the first member of struct signatured_type, | |
7286 | we can go from a pointer to one to a pointer to the other. */ | |
7287 | sig_type = (struct signatured_type *) this_cu; | |
7288 | signature = sig_type->signature; | |
7289 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
7290 | } | |
7291 | else | |
7292 | { | |
7293 | struct attribute *attr; | |
7294 | ||
7295 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
7296 | if (! attr) | |
7297 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
7298 | " [in module %s]"), | |
e3b94546 | 7299 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 DE |
7300 | signature = DW_UNSND (attr); |
7301 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
7302 | signature); | |
7303 | } | |
7304 | ||
b0c7bfa9 DE |
7305 | return dwo_unit; |
7306 | } | |
7307 | ||
a2ce51a0 | 7308 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 | 7309 | See it for a description of the parameters. |
fcd3b13d | 7310 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 DE |
7311 | |
7312 | static void | |
6aa5f3a6 DE |
7313 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
7314 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
7315 | die_reader_func_ftype *die_reader_func, |
7316 | void *data) | |
7317 | { | |
fcd3b13d | 7318 | std::unique_ptr<dwarf2_cu> new_cu; |
a2ce51a0 | 7319 | struct signatured_type *sig_type; |
a2ce51a0 DE |
7320 | struct die_reader_specs reader; |
7321 | const gdb_byte *info_ptr; | |
7322 | struct die_info *comp_unit_die; | |
7323 | int has_children; | |
ed2dc618 | 7324 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
a2ce51a0 DE |
7325 | |
7326 | /* Verify we can do the following downcast, and that we have the | |
7327 | data we need. */ | |
7328 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
7329 | sig_type = (struct signatured_type *) this_cu; | |
7330 | gdb_assert (sig_type->dwo_unit != NULL); | |
7331 | ||
6aa5f3a6 DE |
7332 | if (use_existing_cu && this_cu->cu != NULL) |
7333 | { | |
7334 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 DE |
7335 | /* There's no need to do the rereading_dwo_cu handling that |
7336 | init_cutu_and_read_dies does since we don't read the stub. */ | |
7337 | } | |
7338 | else | |
7339 | { | |
7340 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7341 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d | 7342 | new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
7343 | } |
7344 | ||
7345 | /* A future optimization, if needed, would be to use an existing | |
7346 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
7347 | could share abbrev tables. */ | |
a2ce51a0 | 7348 | |
685af9cd TT |
7349 | /* The abbreviation table used by READER, this must live at least as long as |
7350 | READER. */ | |
7351 | abbrev_table_up dwo_abbrev_table; | |
7352 | ||
a2ce51a0 | 7353 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
a2ce51a0 DE |
7354 | NULL /* stub_comp_unit_die */, |
7355 | sig_type->dwo_unit->dwo_file->comp_dir, | |
7356 | &reader, &info_ptr, | |
685af9cd TT |
7357 | &comp_unit_die, &has_children, |
7358 | &dwo_abbrev_table) == 0) | |
a2ce51a0 DE |
7359 | { |
7360 | /* Dummy die. */ | |
a2ce51a0 DE |
7361 | return; |
7362 | } | |
7363 | ||
7364 | /* All the "real" work is done here. */ | |
7365 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
7366 | ||
6aa5f3a6 | 7367 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
7368 | but the alternative is making the latter more complex. |
7369 | This function is only for the special case of using DWO files directly: | |
7370 | no point in overly complicating the general case just to handle this. */ | |
fcd3b13d | 7371 | if (new_cu != NULL && keep) |
a2ce51a0 | 7372 | { |
fcd3b13d SM |
7373 | /* Link this CU into read_in_chain. */ |
7374 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7375 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7376 | /* The chain owns it now. */ | |
7377 | new_cu.release (); | |
a2ce51a0 | 7378 | } |
a2ce51a0 DE |
7379 | } |
7380 | ||
fd820528 | 7381 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 7382 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 7383 | |
f4dc4d17 DE |
7384 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
7385 | Otherwise the table specified in the comp unit header is read in and used. | |
7386 | This is an optimization for when we already have the abbrev table. | |
7387 | ||
dee91e82 DE |
7388 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
7389 | Otherwise, a new CU is allocated with xmalloc. | |
7390 | ||
7391 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
7392 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
7393 | ||
7394 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 7395 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 7396 | |
70221824 | 7397 | static void |
fd820528 | 7398 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 7399 | struct abbrev_table *abbrev_table, |
fd820528 | 7400 | int use_existing_cu, int keep, |
58f0c718 | 7401 | bool skip_partial, |
fd820528 DE |
7402 | die_reader_func_ftype *die_reader_func, |
7403 | void *data) | |
c906108c | 7404 | { |
ed2dc618 | 7405 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7406 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7407 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7408 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 7409 | struct dwarf2_cu *cu; |
d521ce57 | 7410 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7411 | struct die_reader_specs reader; |
d85a05f0 | 7412 | struct die_info *comp_unit_die; |
dee91e82 | 7413 | int has_children; |
d85a05f0 | 7414 | struct attribute *attr; |
dee91e82 | 7415 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 7416 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
7417 | /* Non-zero if CU currently points to a DWO file and we need to |
7418 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 7419 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 7420 | int rereading_dwo_cu = 0; |
c906108c | 7421 | |
b4f54984 | 7422 | if (dwarf_die_debug) |
9d8780f0 | 7423 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7424 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7425 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7426 | |
dee91e82 DE |
7427 | if (use_existing_cu) |
7428 | gdb_assert (keep); | |
23745b47 | 7429 | |
a2ce51a0 DE |
7430 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
7431 | file (instead of going through the stub), short-circuit all of this. */ | |
7432 | if (this_cu->reading_dwo_directly) | |
7433 | { | |
7434 | /* Narrow down the scope of possibilities to have to understand. */ | |
7435 | gdb_assert (this_cu->is_debug_types); | |
7436 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
7437 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
7438 | die_reader_func, data); | |
a2ce51a0 DE |
7439 | return; |
7440 | } | |
7441 | ||
dee91e82 DE |
7442 | /* This is cheap if the section is already read in. */ |
7443 | dwarf2_read_section (objfile, section); | |
7444 | ||
9c541725 | 7445 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
7446 | |
7447 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 7448 | |
fcd3b13d | 7449 | std::unique_ptr<dwarf2_cu> new_cu; |
dee91e82 DE |
7450 | if (use_existing_cu && this_cu->cu != NULL) |
7451 | { | |
7452 | cu = this_cu->cu; | |
42e7ad6c DE |
7453 | /* If this CU is from a DWO file we need to start over, we need to |
7454 | refetch the attributes from the skeleton CU. | |
7455 | This could be optimized by retrieving those attributes from when we | |
7456 | were here the first time: the previous comp_unit_die was stored in | |
7457 | comp_unit_obstack. But there's no data yet that we need this | |
7458 | optimization. */ | |
7459 | if (cu->dwo_unit != NULL) | |
7460 | rereading_dwo_cu = 1; | |
dee91e82 DE |
7461 | } |
7462 | else | |
7463 | { | |
7464 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7465 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d SM |
7466 | new_cu.reset (new dwarf2_cu (this_cu)); |
7467 | cu = new_cu.get (); | |
42e7ad6c | 7468 | } |
dee91e82 | 7469 | |
b0c7bfa9 | 7470 | /* Get the header. */ |
9c541725 | 7471 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
7472 | { |
7473 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 7474 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
7475 | } |
7476 | else | |
7477 | { | |
3019eac3 | 7478 | if (this_cu->is_debug_types) |
dee91e82 | 7479 | { |
ed2dc618 SM |
7480 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7481 | &cu->header, section, | |
4bdcc0c1 | 7482 | abbrev_section, info_ptr, |
43988095 | 7483 | rcuh_kind::TYPE); |
dee91e82 | 7484 | |
42e7ad6c DE |
7485 | /* Since per_cu is the first member of struct signatured_type, |
7486 | we can go from a pointer to one to a pointer to the other. */ | |
7487 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 7488 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
7489 | gdb_assert (sig_type->type_offset_in_tu |
7490 | == cu->header.type_cu_offset_in_tu); | |
7491 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 7492 | |
42e7ad6c DE |
7493 | /* LENGTH has not been set yet for type units if we're |
7494 | using .gdb_index. */ | |
1ce1cefd | 7495 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
7496 | |
7497 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
7498 | sig_type->type_offset_in_section = |
7499 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
7500 | |
7501 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
7502 | } |
7503 | else | |
7504 | { | |
ed2dc618 SM |
7505 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7506 | &cu->header, section, | |
4bdcc0c1 | 7507 | abbrev_section, |
43988095 JK |
7508 | info_ptr, |
7509 | rcuh_kind::COMPILE); | |
dee91e82 | 7510 | |
9c541725 | 7511 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 7512 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 7513 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
7514 | } |
7515 | } | |
10b3939b | 7516 | |
6caca83c | 7517 | /* Skip dummy compilation units. */ |
dee91e82 | 7518 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 7519 | || peek_abbrev_code (abfd, info_ptr) == 0) |
fcd3b13d | 7520 | return; |
6caca83c | 7521 | |
433df2d4 DE |
7522 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
7523 | And if we need to read them now, make sure they're freed when we're | |
685af9cd TT |
7524 | done (own the table through ABBREV_TABLE_HOLDER). */ |
7525 | abbrev_table_up abbrev_table_holder; | |
f4dc4d17 | 7526 | if (abbrev_table != NULL) |
685af9cd TT |
7527 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
7528 | else | |
f4dc4d17 | 7529 | { |
685af9cd TT |
7530 | abbrev_table_holder |
7531 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7532 | cu->header.abbrev_sect_off); | |
7533 | abbrev_table = abbrev_table_holder.get (); | |
42e7ad6c | 7534 | } |
af703f96 | 7535 | |
dee91e82 | 7536 | /* Read the top level CU/TU die. */ |
685af9cd | 7537 | init_cu_die_reader (&reader, cu, section, NULL, abbrev_table); |
dee91e82 | 7538 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 7539 | |
58f0c718 TT |
7540 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
7541 | return; | |
7542 | ||
b0c7bfa9 | 7543 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
7544 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
7545 | table from the DWO file and pass the ownership over to us. It will be | |
7546 | referenced from READER, so we must make sure to free it after we're done | |
7547 | with READER. | |
7548 | ||
b0c7bfa9 DE |
7549 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
7550 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 | 7551 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
685af9cd | 7552 | abbrev_table_up dwo_abbrev_table; |
3019eac3 DE |
7553 | if (attr) |
7554 | { | |
3019eac3 | 7555 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7556 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
7557 | |
7558 | if (has_children) | |
6a506a2d | 7559 | { |
b98664d3 | 7560 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
7561 | " has children (offset %s) [in module %s]"), |
7562 | sect_offset_str (this_cu->sect_off), | |
7563 | bfd_get_filename (abfd)); | |
6a506a2d | 7564 | } |
b0c7bfa9 | 7565 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 7566 | if (dwo_unit != NULL) |
3019eac3 | 7567 | { |
6a506a2d | 7568 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 7569 | comp_unit_die, NULL, |
6a506a2d | 7570 | &reader, &info_ptr, |
685af9cd TT |
7571 | &dwo_comp_unit_die, &has_children, |
7572 | &dwo_abbrev_table) == 0) | |
6a506a2d DE |
7573 | { |
7574 | /* Dummy die. */ | |
6a506a2d DE |
7575 | return; |
7576 | } | |
7577 | comp_unit_die = dwo_comp_unit_die; | |
7578 | } | |
7579 | else | |
7580 | { | |
7581 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7582 | the stub. A complaint has already been logged. There's | |
7583 | not much more we can do except pass on the stub DIE to | |
7584 | die_reader_func. We don't want to throw an error on bad | |
7585 | debug info. */ | |
3019eac3 DE |
7586 | } |
7587 | } | |
7588 | ||
b0c7bfa9 | 7589 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
7590 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
7591 | ||
b0c7bfa9 | 7592 | /* Done, clean up. */ |
fcd3b13d | 7593 | if (new_cu != NULL && keep) |
348e048f | 7594 | { |
fcd3b13d SM |
7595 | /* Link this CU into read_in_chain. */ |
7596 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7597 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7598 | /* The chain owns it now. */ | |
7599 | new_cu.release (); | |
348e048f | 7600 | } |
dee91e82 DE |
7601 | } |
7602 | ||
33e80786 DE |
7603 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
7604 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
7605 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7606 | |
7607 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7608 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7609 | |
7610 | We fill in THIS_CU->length. | |
7611 | ||
7612 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
7613 | linker) then DIE_READER_FUNC will not get called. | |
7614 | ||
7615 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7616 | This is done in order to not leave THIS_CU->cu in a state where we have |
7617 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
7618 | |
7619 | static void | |
7620 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 7621 | struct dwo_file *dwo_file, |
dee91e82 DE |
7622 | die_reader_func_ftype *die_reader_func, |
7623 | void *data) | |
7624 | { | |
ed2dc618 | 7625 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7626 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7627 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7628 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 7629 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7630 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7631 | struct die_reader_specs reader; |
dee91e82 DE |
7632 | struct die_info *comp_unit_die; |
7633 | int has_children; | |
7634 | ||
b4f54984 | 7635 | if (dwarf_die_debug) |
9d8780f0 | 7636 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7637 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7638 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7639 | |
dee91e82 DE |
7640 | gdb_assert (this_cu->cu == NULL); |
7641 | ||
33e80786 DE |
7642 | abbrev_section = (dwo_file != NULL |
7643 | ? &dwo_file->sections.abbrev | |
7644 | : get_abbrev_section_for_cu (this_cu)); | |
7645 | ||
dee91e82 DE |
7646 | /* This is cheap if the section is already read in. */ |
7647 | dwarf2_read_section (objfile, section); | |
7648 | ||
fcd3b13d | 7649 | struct dwarf2_cu cu (this_cu); |
dee91e82 | 7650 | |
9c541725 | 7651 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 SM |
7652 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7653 | &cu.header, section, | |
4bdcc0c1 | 7654 | abbrev_section, info_ptr, |
43988095 JK |
7655 | (this_cu->is_debug_types |
7656 | ? rcuh_kind::TYPE | |
7657 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7658 | |
1ce1cefd | 7659 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
7660 | |
7661 | /* Skip dummy compilation units. */ | |
7662 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7663 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
fcd3b13d | 7664 | return; |
72bf9492 | 7665 | |
685af9cd TT |
7666 | abbrev_table_up abbrev_table |
7667 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7668 | cu.header.abbrev_sect_off); | |
dee91e82 | 7669 | |
685af9cd | 7670 | init_cu_die_reader (&reader, &cu, section, dwo_file, abbrev_table.get ()); |
dee91e82 DE |
7671 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
7672 | ||
7673 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
dee91e82 DE |
7674 | } |
7675 | ||
3019eac3 DE |
7676 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
7677 | does not lookup the specified DWO file. | |
7678 | This cannot be used to read DWO files. | |
dee91e82 DE |
7679 | |
7680 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7681 | This is done in order to not leave THIS_CU->cu in a state where we have |
7682 | to care whether it refers to the "main" CU or the DWO CU. | |
7683 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
7684 | |
7685 | static void | |
7686 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
7687 | die_reader_func_ftype *die_reader_func, | |
7688 | void *data) | |
7689 | { | |
33e80786 | 7690 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 7691 | } |
0018ea6f DE |
7692 | \f |
7693 | /* Type Unit Groups. | |
dee91e82 | 7694 | |
0018ea6f DE |
7695 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7696 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7697 | so that all types coming from the same compilation (.o file) are grouped | |
7698 | together. A future step could be to put the types in the same symtab as | |
7699 | the CU the types ultimately came from. */ | |
ff013f42 | 7700 | |
f4dc4d17 DE |
7701 | static hashval_t |
7702 | hash_type_unit_group (const void *item) | |
7703 | { | |
9a3c8263 SM |
7704 | const struct type_unit_group *tu_group |
7705 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7706 | |
094b34ac | 7707 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7708 | } |
348e048f DE |
7709 | |
7710 | static int | |
f4dc4d17 | 7711 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7712 | { |
9a3c8263 SM |
7713 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7714 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7715 | |
094b34ac | 7716 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7717 | } |
348e048f | 7718 | |
f4dc4d17 DE |
7719 | /* Allocate a hash table for type unit groups. */ |
7720 | ||
7721 | static htab_t | |
ed2dc618 | 7722 | allocate_type_unit_groups_table (struct objfile *objfile) |
f4dc4d17 DE |
7723 | { |
7724 | return htab_create_alloc_ex (3, | |
7725 | hash_type_unit_group, | |
7726 | eq_type_unit_group, | |
7727 | NULL, | |
ed2dc618 | 7728 | &objfile->objfile_obstack, |
f4dc4d17 DE |
7729 | hashtab_obstack_allocate, |
7730 | dummy_obstack_deallocate); | |
7731 | } | |
dee91e82 | 7732 | |
f4dc4d17 DE |
7733 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7734 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7735 | of any one psymtab grow too big. */ | |
7736 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7737 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7738 | |
094b34ac | 7739 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7740 | Create the type_unit_group object used to hold one or more TUs. */ |
7741 | ||
7742 | static struct type_unit_group * | |
094b34ac | 7743 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7744 | { |
518817b3 SM |
7745 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7746 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7747 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7748 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7749 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7750 | |
7751 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7752 | struct type_unit_group); | |
094b34ac | 7753 | per_cu = &tu_group->per_cu; |
518817b3 | 7754 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7755 | |
094b34ac DE |
7756 | if (dwarf2_per_objfile->using_index) |
7757 | { | |
7758 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7759 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7760 | } |
7761 | else | |
7762 | { | |
9c541725 | 7763 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
7764 | struct partial_symtab *pst; |
7765 | char *name; | |
7766 | ||
7767 | /* Give the symtab a useful name for debug purposes. */ | |
7768 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
7769 | name = xstrprintf ("<type_units_%d>", | |
7770 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
7771 | else | |
7772 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
7773 | ||
7774 | pst = create_partial_symtab (per_cu, name); | |
7775 | pst->anonymous = 1; | |
f4dc4d17 | 7776 | |
094b34ac DE |
7777 | xfree (name); |
7778 | } | |
f4dc4d17 | 7779 | |
094b34ac | 7780 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7781 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7782 | |
7783 | return tu_group; | |
7784 | } | |
7785 | ||
094b34ac DE |
7786 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7787 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7788 | |
7789 | static struct type_unit_group * | |
ff39bb5e | 7790 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7791 | { |
518817b3 SM |
7792 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7793 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7794 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7795 | struct type_unit_group *tu_group; | |
7796 | void **slot; | |
7797 | unsigned int line_offset; | |
7798 | struct type_unit_group type_unit_group_for_lookup; | |
7799 | ||
7800 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
7801 | { | |
7802 | dwarf2_per_objfile->type_unit_groups = | |
ed2dc618 | 7803 | allocate_type_unit_groups_table (dwarf2_per_objfile->objfile); |
f4dc4d17 DE |
7804 | } |
7805 | ||
7806 | /* Do we need to create a new group, or can we use an existing one? */ | |
7807 | ||
7808 | if (stmt_list) | |
7809 | { | |
7810 | line_offset = DW_UNSND (stmt_list); | |
7811 | ++tu_stats->nr_symtab_sharers; | |
7812 | } | |
7813 | else | |
7814 | { | |
7815 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7816 | We can do various things here like create one group per TU or | |
7817 | spread them over multiple groups to split up the expansion work. | |
7818 | To avoid worst case scenarios (too many groups or too large groups) | |
7819 | we, umm, group them in bunches. */ | |
7820 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7821 | | (tu_stats->nr_stmt_less_type_units | |
7822 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7823 | ++tu_stats->nr_stmt_less_type_units; | |
7824 | } | |
7825 | ||
094b34ac | 7826 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7827 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
7828 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
7829 | &type_unit_group_for_lookup, INSERT); | |
7830 | if (*slot != NULL) | |
7831 | { | |
9a3c8263 | 7832 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7833 | gdb_assert (tu_group != NULL); |
7834 | } | |
7835 | else | |
7836 | { | |
9c541725 | 7837 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7838 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7839 | *slot = tu_group; |
7840 | ++tu_stats->nr_symtabs; | |
7841 | } | |
7842 | ||
7843 | return tu_group; | |
7844 | } | |
0018ea6f DE |
7845 | \f |
7846 | /* Partial symbol tables. */ | |
7847 | ||
7848 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7849 | ||
7850 | The caller must fill in the following details: | |
7851 | dirname, textlow, texthigh. */ | |
7852 | ||
7853 | static struct partial_symtab * | |
7854 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
7855 | { | |
e3b94546 | 7856 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
0018ea6f DE |
7857 | struct partial_symtab *pst; |
7858 | ||
18a94d75 | 7859 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
7860 | objfile->global_psymbols, |
7861 | objfile->static_psymbols); | |
0018ea6f DE |
7862 | |
7863 | pst->psymtabs_addrmap_supported = 1; | |
7864 | ||
7865 | /* This is the glue that links PST into GDB's symbol API. */ | |
7866 | pst->read_symtab_private = per_cu; | |
7867 | pst->read_symtab = dwarf2_read_symtab; | |
7868 | per_cu->v.psymtab = pst; | |
7869 | ||
7870 | return pst; | |
7871 | } | |
7872 | ||
b93601f3 TT |
7873 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
7874 | type. */ | |
7875 | ||
7876 | struct process_psymtab_comp_unit_data | |
7877 | { | |
7878 | /* True if we are reading a DW_TAG_partial_unit. */ | |
7879 | ||
7880 | int want_partial_unit; | |
7881 | ||
7882 | /* The "pretend" language that is used if the CU doesn't declare a | |
7883 | language. */ | |
7884 | ||
7885 | enum language pretend_language; | |
7886 | }; | |
7887 | ||
0018ea6f DE |
7888 | /* die_reader_func for process_psymtab_comp_unit. */ |
7889 | ||
7890 | static void | |
7891 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7892 | const gdb_byte *info_ptr, |
0018ea6f DE |
7893 | struct die_info *comp_unit_die, |
7894 | int has_children, | |
7895 | void *data) | |
7896 | { | |
7897 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7898 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 7899 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7900 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7901 | CORE_ADDR baseaddr; |
7902 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
7903 | struct partial_symtab *pst; | |
3a2b436a | 7904 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7905 | const char *filename; |
9a3c8263 SM |
7906 | struct process_psymtab_comp_unit_data *info |
7907 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 7908 | |
b93601f3 | 7909 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
7910 | return; |
7911 | ||
7912 | gdb_assert (! per_cu->is_debug_types); | |
7913 | ||
b93601f3 | 7914 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f | 7915 | |
0018ea6f | 7916 | /* Allocate a new partial symbol table structure. */ |
7d45c7c3 KB |
7917 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7918 | if (filename == NULL) | |
0018ea6f | 7919 | filename = ""; |
0018ea6f DE |
7920 | |
7921 | pst = create_partial_symtab (per_cu, filename); | |
7922 | ||
7923 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7924 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
7925 | |
7926 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7927 | ||
7928 | dwarf2_find_base_address (comp_unit_die, cu); | |
7929 | ||
7930 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7931 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7932 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7933 | &best_highpc, cu, pst); | |
7934 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
7935 | /* Store the contiguous range if it is not empty; it can be empty for |
7936 | CUs with no code. */ | |
7937 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
7938 | gdbarch_adjust_dwarf2_addr (gdbarch, |
7939 | best_lowpc + baseaddr), | |
7940 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
7941 | best_highpc + baseaddr) - 1, | |
7942 | pst); | |
0018ea6f DE |
7943 | |
7944 | /* Check if comp unit has_children. | |
7945 | If so, read the rest of the partial symbols from this comp unit. | |
7946 | If not, there's no more debug_info for this comp unit. */ | |
7947 | if (has_children) | |
7948 | { | |
7949 | struct partial_die_info *first_die; | |
7950 | CORE_ADDR lowpc, highpc; | |
7951 | ||
7952 | lowpc = ((CORE_ADDR) -1); | |
7953 | highpc = ((CORE_ADDR) 0); | |
7954 | ||
7955 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7956 | ||
7957 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7958 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7959 | |
7960 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7961 | complaints from `maint check'. */ | |
7962 | if (lowpc == ((CORE_ADDR) -1)) | |
7963 | lowpc = highpc; | |
7964 | ||
7965 | /* If the compilation unit didn't have an explicit address range, | |
7966 | then use the information extracted from its child dies. */ | |
e385593e | 7967 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7968 | { |
7969 | best_lowpc = lowpc; | |
7970 | best_highpc = highpc; | |
7971 | } | |
7972 | } | |
3e29f34a MR |
7973 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
7974 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 7975 | |
8763cede | 7976 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
7977 | |
7978 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
7979 | { | |
7980 | int i; | |
7981 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7982 | struct dwarf2_per_cu_data *iter; | |
7983 | ||
7984 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7985 | post-pass. */ | |
7986 | pst->number_of_dependencies = len; | |
8d749320 SM |
7987 | pst->dependencies = |
7988 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
7989 | for (i = 0; |
7990 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
7991 | i, iter); | |
7992 | ++i) | |
7993 | pst->dependencies[i] = iter->v.psymtab; | |
7994 | ||
7995 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7996 | } | |
7997 | ||
7998 | /* Get the list of files included in the current compilation unit, | |
7999 | and build a psymtab for each of them. */ | |
8000 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
8001 | ||
b4f54984 | 8002 | if (dwarf_read_debug) |
0018ea6f DE |
8003 | { |
8004 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
8005 | ||
8006 | fprintf_unfiltered (gdb_stdlog, | |
9d8780f0 | 8007 | "Psymtab for %s unit @%s: %s - %s" |
0018ea6f DE |
8008 | ", %d global, %d static syms\n", |
8009 | per_cu->is_debug_types ? "type" : "comp", | |
9d8780f0 | 8010 | sect_offset_str (per_cu->sect_off), |
0018ea6f DE |
8011 | paddress (gdbarch, pst->textlow), |
8012 | paddress (gdbarch, pst->texthigh), | |
8013 | pst->n_global_syms, pst->n_static_syms); | |
8014 | } | |
8015 | } | |
8016 | ||
8017 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8018 | Process compilation unit THIS_CU for a psymtab. */ | |
8019 | ||
8020 | static void | |
8021 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
8022 | int want_partial_unit, |
8023 | enum language pretend_language) | |
0018ea6f DE |
8024 | { |
8025 | /* If this compilation unit was already read in, free the | |
8026 | cached copy in order to read it in again. This is | |
8027 | necessary because we skipped some symbols when we first | |
8028 | read in the compilation unit (see load_partial_dies). | |
8029 | This problem could be avoided, but the benefit is unclear. */ | |
8030 | if (this_cu->cu != NULL) | |
8031 | free_one_cached_comp_unit (this_cu); | |
8032 | ||
f1902523 | 8033 | if (this_cu->is_debug_types) |
58f0c718 TT |
8034 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
8035 | build_type_psymtabs_reader, NULL); | |
f1902523 JK |
8036 | else |
8037 | { | |
8038 | process_psymtab_comp_unit_data info; | |
8039 | info.want_partial_unit = want_partial_unit; | |
8040 | info.pretend_language = pretend_language; | |
58f0c718 | 8041 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
f1902523 JK |
8042 | process_psymtab_comp_unit_reader, &info); |
8043 | } | |
0018ea6f DE |
8044 | |
8045 | /* Age out any secondary CUs. */ | |
ed2dc618 | 8046 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 8047 | } |
f4dc4d17 DE |
8048 | |
8049 | /* Reader function for build_type_psymtabs. */ | |
8050 | ||
8051 | static void | |
8052 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8053 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
8054 | struct die_info *type_unit_die, |
8055 | int has_children, | |
8056 | void *data) | |
8057 | { | |
ed2dc618 | 8058 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 8059 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
8060 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8061 | struct dwarf2_cu *cu = reader->cu; | |
8062 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 8063 | struct signatured_type *sig_type; |
f4dc4d17 DE |
8064 | struct type_unit_group *tu_group; |
8065 | struct attribute *attr; | |
8066 | struct partial_die_info *first_die; | |
8067 | CORE_ADDR lowpc, highpc; | |
8068 | struct partial_symtab *pst; | |
8069 | ||
8070 | gdb_assert (data == NULL); | |
0186c6a7 DE |
8071 | gdb_assert (per_cu->is_debug_types); |
8072 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8073 | |
8074 | if (! has_children) | |
8075 | return; | |
8076 | ||
8077 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 8078 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 8079 | |
0186c6a7 | 8080 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
8081 | |
8082 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 DE |
8083 | pst = create_partial_symtab (per_cu, ""); |
8084 | pst->anonymous = 1; | |
8085 | ||
8086 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8087 | ||
8088 | lowpc = (CORE_ADDR) -1; | |
8089 | highpc = (CORE_ADDR) 0; | |
8090 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
8091 | ||
8763cede | 8092 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
8093 | } |
8094 | ||
73051182 DE |
8095 | /* Struct used to sort TUs by their abbreviation table offset. */ |
8096 | ||
8097 | struct tu_abbrev_offset | |
8098 | { | |
b2bdb8cf SM |
8099 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
8100 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
8101 | {} | |
8102 | ||
8103 | signatured_type *sig_type; | |
73051182 DE |
8104 | sect_offset abbrev_offset; |
8105 | }; | |
8106 | ||
484cf504 | 8107 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 8108 | |
484cf504 TT |
8109 | static bool |
8110 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
8111 | const struct tu_abbrev_offset &b) | |
73051182 | 8112 | { |
484cf504 | 8113 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
8114 | } |
8115 | ||
8116 | /* Efficiently read all the type units. | |
8117 | This does the bulk of the work for build_type_psymtabs. | |
8118 | ||
8119 | The efficiency is because we sort TUs by the abbrev table they use and | |
8120 | only read each abbrev table once. In one program there are 200K TUs | |
8121 | sharing 8K abbrev tables. | |
8122 | ||
8123 | The main purpose of this function is to support building the | |
8124 | dwarf2_per_objfile->type_unit_groups table. | |
8125 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
8126 | can collapse the search space by grouping them by stmt_list. | |
8127 | The savings can be significant, in the same program from above the 200K TUs | |
8128 | share 8K stmt_list tables. | |
8129 | ||
8130 | FUNC is expected to call get_type_unit_group, which will create the | |
8131 | struct type_unit_group if necessary and add it to | |
8132 | dwarf2_per_objfile->type_unit_groups. */ | |
8133 | ||
8134 | static void | |
ed2dc618 | 8135 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 8136 | { |
73051182 | 8137 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 8138 | abbrev_table_up abbrev_table; |
73051182 | 8139 | sect_offset abbrev_offset; |
73051182 DE |
8140 | |
8141 | /* It's up to the caller to not call us multiple times. */ | |
8142 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
8143 | ||
b2bdb8cf | 8144 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
8145 | return; |
8146 | ||
8147 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
8148 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
8149 | read each abbrev table in. | |
8150 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
8151 | This is simpler and efficient enough for now. | |
8152 | ||
8153 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
8154 | symtab to use). Typically TUs with the same abbrev offset have the same | |
8155 | stmt_list value too so in practice this should work well. | |
8156 | ||
8157 | The basic algorithm here is: | |
8158 | ||
8159 | sort TUs by abbrev table | |
8160 | for each TU with same abbrev table: | |
8161 | read abbrev table if first user | |
8162 | read TU top level DIE | |
8163 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
8164 | call FUNC */ | |
8165 | ||
b4f54984 | 8166 | if (dwarf_read_debug) |
73051182 DE |
8167 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
8168 | ||
8169 | /* Sort in a separate table to maintain the order of all_type_units | |
8170 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
8171 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
8172 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
8173 | ||
8174 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
8175 | sorted_by_abbrev.emplace_back | |
8176 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
8177 | sig_type->per_cu.section, | |
8178 | sig_type->per_cu.sect_off)); | |
73051182 | 8179 | |
484cf504 TT |
8180 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
8181 | sort_tu_by_abbrev_offset); | |
73051182 | 8182 | |
9c541725 | 8183 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 8184 | |
b2bdb8cf | 8185 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 8186 | { |
73051182 DE |
8187 | /* Switch to the next abbrev table if necessary. */ |
8188 | if (abbrev_table == NULL | |
b2bdb8cf | 8189 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 8190 | { |
b2bdb8cf | 8191 | abbrev_offset = tu.abbrev_offset; |
73051182 | 8192 | abbrev_table = |
ed2dc618 SM |
8193 | abbrev_table_read_table (dwarf2_per_objfile, |
8194 | &dwarf2_per_objfile->abbrev, | |
73051182 DE |
8195 | abbrev_offset); |
8196 | ++tu_stats->nr_uniq_abbrev_tables; | |
8197 | } | |
8198 | ||
b2bdb8cf | 8199 | init_cutu_and_read_dies (&tu.sig_type->per_cu, abbrev_table.get (), |
58f0c718 | 8200 | 0, 0, false, build_type_psymtabs_reader, NULL); |
73051182 | 8201 | } |
6aa5f3a6 | 8202 | } |
73051182 | 8203 | |
6aa5f3a6 DE |
8204 | /* Print collected type unit statistics. */ |
8205 | ||
8206 | static void | |
ed2dc618 | 8207 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8208 | { |
8209 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8210 | ||
8211 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
8212 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
8213 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
8214 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
8215 | tu_stats->nr_uniq_abbrev_tables); | |
8216 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
8217 | tu_stats->nr_symtabs); | |
8218 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
8219 | tu_stats->nr_symtab_sharers); | |
8220 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
8221 | tu_stats->nr_stmt_less_type_units); | |
8222 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
8223 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
8224 | } |
8225 | ||
f4dc4d17 DE |
8226 | /* Traversal function for build_type_psymtabs. */ |
8227 | ||
8228 | static int | |
8229 | build_type_psymtab_dependencies (void **slot, void *info) | |
8230 | { | |
ed2dc618 SM |
8231 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8232 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
8233 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8234 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 8235 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 8236 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
8237 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
8238 | struct signatured_type *iter; | |
f4dc4d17 DE |
8239 | int i; |
8240 | ||
8241 | gdb_assert (len > 0); | |
0186c6a7 | 8242 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
8243 | |
8244 | pst->number_of_dependencies = len; | |
8d749320 SM |
8245 | pst->dependencies = |
8246 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 8247 | for (i = 0; |
0186c6a7 | 8248 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
8249 | ++i) |
8250 | { | |
0186c6a7 DE |
8251 | gdb_assert (iter->per_cu.is_debug_types); |
8252 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 8253 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
8254 | } |
8255 | ||
0186c6a7 | 8256 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
8257 | |
8258 | return 1; | |
8259 | } | |
8260 | ||
8261 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8262 | Build partial symbol tables for the .debug_types comp-units. */ | |
8263 | ||
8264 | static void | |
ed2dc618 | 8265 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 8266 | { |
ed2dc618 | 8267 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
8268 | return; |
8269 | ||
ed2dc618 | 8270 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 8271 | } |
f4dc4d17 | 8272 | |
6aa5f3a6 DE |
8273 | /* Traversal function for process_skeletonless_type_unit. |
8274 | Read a TU in a DWO file and build partial symbols for it. */ | |
8275 | ||
8276 | static int | |
8277 | process_skeletonless_type_unit (void **slot, void *info) | |
8278 | { | |
8279 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
8280 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8281 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
8282 | struct signatured_type find_entry, *entry; |
8283 | ||
8284 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
8285 | ||
8286 | if (dwarf2_per_objfile->signatured_types == NULL) | |
8287 | { | |
8288 | dwarf2_per_objfile->signatured_types | |
ed2dc618 | 8289 | = allocate_signatured_type_table (dwarf2_per_objfile->objfile); |
6aa5f3a6 DE |
8290 | } |
8291 | ||
8292 | find_entry.signature = dwo_unit->signature; | |
8293 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
8294 | INSERT); | |
8295 | /* If we've already seen this type there's nothing to do. What's happening | |
8296 | is we're doing our own version of comdat-folding here. */ | |
8297 | if (*slot != NULL) | |
8298 | return 1; | |
8299 | ||
8300 | /* This does the job that create_all_type_units would have done for | |
8301 | this TU. */ | |
ed2dc618 SM |
8302 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
8303 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
8304 | *slot = entry; |
8305 | ||
8306 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
58f0c718 | 8307 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, false, |
6aa5f3a6 DE |
8308 | build_type_psymtabs_reader, NULL); |
8309 | ||
8310 | return 1; | |
8311 | } | |
8312 | ||
8313 | /* Traversal function for process_skeletonless_type_units. */ | |
8314 | ||
8315 | static int | |
8316 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
8317 | { | |
8318 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
8319 | ||
8320 | if (dwo_file->tus != NULL) | |
8321 | { | |
8322 | htab_traverse_noresize (dwo_file->tus, | |
8323 | process_skeletonless_type_unit, info); | |
8324 | } | |
8325 | ||
8326 | return 1; | |
8327 | } | |
8328 | ||
8329 | /* Scan all TUs of DWO files, verifying we've processed them. | |
8330 | This is needed in case a TU was emitted without its skeleton. | |
8331 | Note: This can't be done until we know what all the DWO files are. */ | |
8332 | ||
8333 | static void | |
ed2dc618 | 8334 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8335 | { |
8336 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 8337 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
8338 | && dwarf2_per_objfile->dwo_files != NULL) |
8339 | { | |
8340 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
8341 | process_dwo_file_for_skeletonless_type_units, | |
ed2dc618 | 8342 | dwarf2_per_objfile); |
6aa5f3a6 | 8343 | } |
348e048f DE |
8344 | } |
8345 | ||
ed2dc618 | 8346 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
8347 | |
8348 | static void | |
ed2dc618 | 8349 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 8350 | { |
b76e467d | 8351 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 8352 | { |
95554aad | 8353 | struct partial_symtab *pst = per_cu->v.psymtab; |
95554aad | 8354 | |
36586728 TT |
8355 | if (pst == NULL) |
8356 | continue; | |
8357 | ||
b76e467d | 8358 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
8359 | { |
8360 | /* Set the 'user' field only if it is not already set. */ | |
8361 | if (pst->dependencies[j]->user == NULL) | |
8362 | pst->dependencies[j]->user = pst; | |
8363 | } | |
8364 | } | |
8365 | } | |
8366 | ||
93311388 DE |
8367 | /* Build the partial symbol table by doing a quick pass through the |
8368 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 8369 | |
93311388 | 8370 | static void |
ed2dc618 | 8371 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 8372 | { |
ed2dc618 | 8373 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 8374 | |
b4f54984 | 8375 | if (dwarf_read_debug) |
45cfd468 DE |
8376 | { |
8377 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 8378 | objfile_name (objfile)); |
45cfd468 DE |
8379 | } |
8380 | ||
98bfdba5 PA |
8381 | dwarf2_per_objfile->reading_partial_symbols = 1; |
8382 | ||
be391dca | 8383 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 8384 | |
93311388 DE |
8385 | /* Any cached compilation units will be linked by the per-objfile |
8386 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 8387 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 8388 | |
ed2dc618 | 8389 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 8390 | |
ed2dc618 | 8391 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 8392 | |
60606b2c TT |
8393 | /* Create a temporary address map on a temporary obstack. We later |
8394 | copy this to the final obstack. */ | |
8268c778 | 8395 | auto_obstack temp_obstack; |
791afaa2 TT |
8396 | |
8397 | scoped_restore save_psymtabs_addrmap | |
8398 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
8399 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 8400 | |
b76e467d SM |
8401 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
8402 | process_psymtab_comp_unit (per_cu, 0, language_minimal); | |
ff013f42 | 8403 | |
6aa5f3a6 | 8404 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 8405 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
8406 | |
8407 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
8408 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
8409 | { | |
8410 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
ed2dc618 | 8411 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
8412 | } |
8413 | ||
b4f54984 | 8414 | if (dwarf_read_debug) |
ed2dc618 | 8415 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 8416 | |
ed2dc618 | 8417 | set_partial_user (dwarf2_per_objfile); |
95554aad | 8418 | |
ff013f42 JK |
8419 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
8420 | &objfile->objfile_obstack); | |
791afaa2 TT |
8421 | /* At this point we want to keep the address map. */ |
8422 | save_psymtabs_addrmap.release (); | |
ff013f42 | 8423 | |
b4f54984 | 8424 | if (dwarf_read_debug) |
45cfd468 | 8425 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 8426 | objfile_name (objfile)); |
ae038cb0 DJ |
8427 | } |
8428 | ||
3019eac3 | 8429 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
8430 | |
8431 | static void | |
dee91e82 | 8432 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 8433 | const gdb_byte *info_ptr, |
dee91e82 DE |
8434 | struct die_info *comp_unit_die, |
8435 | int has_children, | |
8436 | void *data) | |
ae038cb0 | 8437 | { |
dee91e82 | 8438 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 8439 | |
95554aad | 8440 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 8441 | |
ae038cb0 DJ |
8442 | /* Check if comp unit has_children. |
8443 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 8444 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 8445 | if (has_children) |
dee91e82 DE |
8446 | load_partial_dies (reader, info_ptr, 0); |
8447 | } | |
98bfdba5 | 8448 | |
dee91e82 DE |
8449 | /* Load the partial DIEs for a secondary CU into memory. |
8450 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 8451 | |
dee91e82 DE |
8452 | static void |
8453 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
8454 | { | |
58f0c718 | 8455 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, false, |
f4dc4d17 | 8456 | load_partial_comp_unit_reader, NULL); |
ae038cb0 DJ |
8457 | } |
8458 | ||
ae038cb0 | 8459 | static void |
ed2dc618 | 8460 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 8461 | struct dwarf2_section_info *section, |
f1902523 | 8462 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 8463 | unsigned int is_dwz) |
ae038cb0 | 8464 | { |
d521ce57 | 8465 | const gdb_byte *info_ptr; |
ed2dc618 | 8466 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 8467 | |
b4f54984 | 8468 | if (dwarf_read_debug) |
bf6af496 | 8469 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
8470 | get_section_name (section), |
8471 | get_section_file_name (section)); | |
bf6af496 | 8472 | |
36586728 | 8473 | dwarf2_read_section (objfile, section); |
ae038cb0 | 8474 | |
36586728 | 8475 | info_ptr = section->buffer; |
6e70227d | 8476 | |
36586728 | 8477 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 8478 | { |
ae038cb0 | 8479 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 8480 | |
9c541725 | 8481 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 8482 | |
f1902523 | 8483 | comp_unit_head cu_header; |
ed2dc618 SM |
8484 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
8485 | abbrev_section, info_ptr, | |
8486 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
8487 | |
8488 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
8489 | if (cu_header.unit_type != DW_UT_type) |
8490 | { | |
8491 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
8492 | struct dwarf2_per_cu_data); | |
8493 | memset (this_cu, 0, sizeof (*this_cu)); | |
8494 | } | |
8495 | else | |
8496 | { | |
8497 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
8498 | struct signatured_type); | |
8499 | memset (sig_type, 0, sizeof (*sig_type)); | |
8500 | sig_type->signature = cu_header.signature; | |
8501 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
8502 | this_cu = &sig_type->per_cu; | |
8503 | } | |
8504 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 8505 | this_cu->sect_off = sect_off; |
f1902523 | 8506 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 8507 | this_cu->is_dwz = is_dwz; |
e3b94546 | 8508 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 8509 | this_cu->section = section; |
ae038cb0 | 8510 | |
b76e467d | 8511 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
8512 | |
8513 | info_ptr = info_ptr + this_cu->length; | |
8514 | } | |
36586728 TT |
8515 | } |
8516 | ||
8517 | /* Create a list of all compilation units in OBJFILE. | |
8518 | This is only done for -readnow and building partial symtabs. */ | |
8519 | ||
8520 | static void | |
ed2dc618 | 8521 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 8522 | { |
b76e467d | 8523 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 8524 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 8525 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 8526 | |
b76e467d | 8527 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 8528 | if (dwz != NULL) |
ed2dc618 | 8529 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 8530 | 1); |
c906108c SS |
8531 | } |
8532 | ||
5734ee8b | 8533 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 8534 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 8535 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
8536 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
8537 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 8538 | |
72bf9492 DJ |
8539 | static void |
8540 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
8541 | CORE_ADDR *highpc, int set_addrmap, |
8542 | struct dwarf2_cu *cu) | |
c906108c | 8543 | { |
72bf9492 | 8544 | struct partial_die_info *pdi; |
c906108c | 8545 | |
91c24f0a DC |
8546 | /* Now, march along the PDI's, descending into ones which have |
8547 | interesting children but skipping the children of the other ones, | |
8548 | until we reach the end of the compilation unit. */ | |
c906108c | 8549 | |
72bf9492 | 8550 | pdi = first_die; |
91c24f0a | 8551 | |
72bf9492 DJ |
8552 | while (pdi != NULL) |
8553 | { | |
52356b79 | 8554 | pdi->fixup (cu); |
c906108c | 8555 | |
f55ee35c | 8556 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8557 | children, so we need to look at them. Ditto for anonymous |
8558 | enums. */ | |
933c6fe4 | 8559 | |
72bf9492 | 8560 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 8561 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
8562 | || pdi->tag == DW_TAG_imported_unit |
8563 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 8564 | { |
72bf9492 | 8565 | switch (pdi->tag) |
c906108c SS |
8566 | { |
8567 | case DW_TAG_subprogram: | |
b1dc1806 | 8568 | case DW_TAG_inlined_subroutine: |
cdc07690 | 8569 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8570 | break; |
72929c62 | 8571 | case DW_TAG_constant: |
c906108c SS |
8572 | case DW_TAG_variable: |
8573 | case DW_TAG_typedef: | |
91c24f0a | 8574 | case DW_TAG_union_type: |
72bf9492 | 8575 | if (!pdi->is_declaration) |
63d06c5c | 8576 | { |
72bf9492 | 8577 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8578 | } |
8579 | break; | |
c906108c | 8580 | case DW_TAG_class_type: |
680b30c7 | 8581 | case DW_TAG_interface_type: |
c906108c | 8582 | case DW_TAG_structure_type: |
72bf9492 | 8583 | if (!pdi->is_declaration) |
c906108c | 8584 | { |
72bf9492 | 8585 | add_partial_symbol (pdi, cu); |
c906108c | 8586 | } |
b7fee5a3 KS |
8587 | if ((cu->language == language_rust |
8588 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
8589 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
8590 | set_addrmap, cu); | |
c906108c | 8591 | break; |
91c24f0a | 8592 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8593 | if (!pdi->is_declaration) |
8594 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8595 | break; |
8596 | case DW_TAG_base_type: | |
a02abb62 | 8597 | case DW_TAG_subrange_type: |
c906108c | 8598 | /* File scope base type definitions are added to the partial |
c5aa993b | 8599 | symbol table. */ |
72bf9492 | 8600 | add_partial_symbol (pdi, cu); |
c906108c | 8601 | break; |
d9fa45fe | 8602 | case DW_TAG_namespace: |
cdc07690 | 8603 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 8604 | break; |
5d7cb8df | 8605 | case DW_TAG_module: |
cdc07690 | 8606 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 8607 | break; |
95554aad TT |
8608 | case DW_TAG_imported_unit: |
8609 | { | |
8610 | struct dwarf2_per_cu_data *per_cu; | |
8611 | ||
f4dc4d17 DE |
8612 | /* For now we don't handle imported units in type units. */ |
8613 | if (cu->per_cu->is_debug_types) | |
8614 | { | |
8615 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8616 | " supported in type units [in module %s]"), | |
518817b3 | 8617 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8618 | } |
8619 | ||
e3b94546 SM |
8620 | per_cu = dwarf2_find_containing_comp_unit |
8621 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8622 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8623 | |
8624 | /* Go read the partial unit, if needed. */ | |
8625 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 8626 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 8627 | |
f4dc4d17 | 8628 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 8629 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
8630 | } |
8631 | break; | |
74921315 KS |
8632 | case DW_TAG_imported_declaration: |
8633 | add_partial_symbol (pdi, cu); | |
8634 | break; | |
c906108c SS |
8635 | default: |
8636 | break; | |
8637 | } | |
8638 | } | |
8639 | ||
72bf9492 DJ |
8640 | /* If the die has a sibling, skip to the sibling. */ |
8641 | ||
8642 | pdi = pdi->die_sibling; | |
8643 | } | |
8644 | } | |
8645 | ||
8646 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8647 | |
72bf9492 | 8648 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8649 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8650 | Enumerators are an exception; they use the scope of their parent |
8651 | enumeration type, i.e. the name of the enumeration type is not | |
8652 | prepended to the enumerator. | |
91c24f0a | 8653 | |
72bf9492 DJ |
8654 | There are two complexities. One is DW_AT_specification; in this |
8655 | case "parent" means the parent of the target of the specification, | |
8656 | instead of the direct parent of the DIE. The other is compilers | |
8657 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8658 | the fully qualified name of structure types from their members' | |
8659 | linkage names. This must be done using the DIE's children rather | |
8660 | than the children of any DW_AT_specification target. We only need | |
8661 | to do this for structures at the top level, i.e. if the target of | |
8662 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8663 | have a parent. */ | |
8664 | ||
8665 | /* Compute the scope prefix associated with PDI's parent, in | |
8666 | compilation unit CU. The result will be allocated on CU's | |
8667 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8668 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8669 | static const char * |
72bf9492 DJ |
8670 | partial_die_parent_scope (struct partial_die_info *pdi, |
8671 | struct dwarf2_cu *cu) | |
8672 | { | |
15d034d0 | 8673 | const char *grandparent_scope; |
72bf9492 | 8674 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8675 | |
72bf9492 DJ |
8676 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8677 | then this means the parent of the specification DIE. */ | |
8678 | ||
8679 | real_pdi = pdi; | |
72bf9492 | 8680 | while (real_pdi->has_specification) |
36586728 TT |
8681 | real_pdi = find_partial_die (real_pdi->spec_offset, |
8682 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
8683 | |
8684 | parent = real_pdi->die_parent; | |
8685 | if (parent == NULL) | |
8686 | return NULL; | |
8687 | ||
8688 | if (parent->scope_set) | |
8689 | return parent->scope; | |
8690 | ||
52356b79 | 8691 | parent->fixup (cu); |
72bf9492 | 8692 | |
10b3939b | 8693 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8694 | |
acebe513 UW |
8695 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8696 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8697 | Work around this problem here. */ | |
8698 | if (cu->language == language_cplus | |
6e70227d | 8699 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8700 | && strcmp (parent->name, "::") == 0 |
8701 | && grandparent_scope == NULL) | |
8702 | { | |
8703 | parent->scope = NULL; | |
8704 | parent->scope_set = 1; | |
8705 | return NULL; | |
8706 | } | |
8707 | ||
9c6c53f7 SA |
8708 | if (pdi->tag == DW_TAG_enumerator) |
8709 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8710 | parent->scope = grandparent_scope; | |
8711 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8712 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8713 | || parent->tag == DW_TAG_structure_type |
8714 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8715 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
8716 | || parent->tag == DW_TAG_union_type |
8717 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
8718 | { |
8719 | if (grandparent_scope == NULL) | |
8720 | parent->scope = parent->name; | |
8721 | else | |
3e43a32a MS |
8722 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8723 | grandparent_scope, | |
f55ee35c | 8724 | parent->name, 0, cu); |
72bf9492 | 8725 | } |
72bf9492 DJ |
8726 | else |
8727 | { | |
8728 | /* FIXME drow/2004-04-01: What should we be doing with | |
8729 | function-local names? For partial symbols, we should probably be | |
8730 | ignoring them. */ | |
b98664d3 | 8731 | complaint (_("unhandled containing DIE tag %d for DIE at %s"), |
9d8780f0 | 8732 | parent->tag, sect_offset_str (pdi->sect_off)); |
72bf9492 | 8733 | parent->scope = grandparent_scope; |
c906108c SS |
8734 | } |
8735 | ||
72bf9492 DJ |
8736 | parent->scope_set = 1; |
8737 | return parent->scope; | |
8738 | } | |
8739 | ||
8740 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8741 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8742 | |
72bf9492 DJ |
8743 | static char * |
8744 | partial_die_full_name (struct partial_die_info *pdi, | |
8745 | struct dwarf2_cu *cu) | |
8746 | { | |
15d034d0 | 8747 | const char *parent_scope; |
72bf9492 | 8748 | |
98bfdba5 PA |
8749 | /* If this is a template instantiation, we can not work out the |
8750 | template arguments from partial DIEs. So, unfortunately, we have | |
8751 | to go through the full DIEs. At least any work we do building | |
8752 | types here will be reused if full symbols are loaded later. */ | |
8753 | if (pdi->has_template_arguments) | |
8754 | { | |
52356b79 | 8755 | pdi->fixup (cu); |
98bfdba5 PA |
8756 | |
8757 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8758 | { | |
8759 | struct die_info *die; | |
8760 | struct attribute attr; | |
8761 | struct dwarf2_cu *ref_cu = cu; | |
8762 | ||
b64f50a1 | 8763 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8764 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8765 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8766 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8767 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8768 | ||
8769 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
8770 | } | |
8771 | } | |
8772 | ||
72bf9492 DJ |
8773 | parent_scope = partial_die_parent_scope (pdi, cu); |
8774 | if (parent_scope == NULL) | |
8775 | return NULL; | |
8776 | else | |
f55ee35c | 8777 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
8778 | } |
8779 | ||
8780 | static void | |
72bf9492 | 8781 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8782 | { |
518817b3 SM |
8783 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8784 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8785 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8786 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8787 | CORE_ADDR addr = 0; |
15d034d0 | 8788 | const char *actual_name = NULL; |
e142c38c | 8789 | CORE_ADDR baseaddr; |
15d034d0 | 8790 | char *built_actual_name; |
e142c38c DJ |
8791 | |
8792 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 8793 | |
15d034d0 TT |
8794 | built_actual_name = partial_die_full_name (pdi, cu); |
8795 | if (built_actual_name != NULL) | |
8796 | actual_name = built_actual_name; | |
63d06c5c | 8797 | |
72bf9492 DJ |
8798 | if (actual_name == NULL) |
8799 | actual_name = pdi->name; | |
8800 | ||
c906108c SS |
8801 | switch (pdi->tag) |
8802 | { | |
b1dc1806 | 8803 | case DW_TAG_inlined_subroutine: |
c906108c | 8804 | case DW_TAG_subprogram: |
3e29f34a | 8805 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 8806 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 8807 | { |
2cfa0c8d JB |
8808 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
8809 | of the global scope. But in Ada, we want to be able to access | |
8810 | nested procedures globally. So all Ada subprograms are stored | |
8811 | in the global scope. */ | |
f47fb265 | 8812 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8813 | built_actual_name != NULL, |
f47fb265 MS |
8814 | VAR_DOMAIN, LOC_BLOCK, |
8815 | &objfile->global_psymbols, | |
1762568f | 8816 | addr, cu->language, objfile); |
c906108c SS |
8817 | } |
8818 | else | |
8819 | { | |
f47fb265 | 8820 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8821 | built_actual_name != NULL, |
f47fb265 MS |
8822 | VAR_DOMAIN, LOC_BLOCK, |
8823 | &objfile->static_psymbols, | |
1762568f | 8824 | addr, cu->language, objfile); |
c906108c | 8825 | } |
0c1b455e TT |
8826 | |
8827 | if (pdi->main_subprogram && actual_name != NULL) | |
8828 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8829 | break; |
72929c62 JB |
8830 | case DW_TAG_constant: |
8831 | { | |
af5bf4ad | 8832 | std::vector<partial_symbol *> *list; |
72929c62 JB |
8833 | |
8834 | if (pdi->is_external) | |
8835 | list = &objfile->global_psymbols; | |
8836 | else | |
8837 | list = &objfile->static_psymbols; | |
f47fb265 | 8838 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8839 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 8840 | list, 0, cu->language, objfile); |
72929c62 JB |
8841 | } |
8842 | break; | |
c906108c | 8843 | case DW_TAG_variable: |
95554aad TT |
8844 | if (pdi->d.locdesc) |
8845 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8846 | |
95554aad | 8847 | if (pdi->d.locdesc |
caac4577 JG |
8848 | && addr == 0 |
8849 | && !dwarf2_per_objfile->has_section_at_zero) | |
8850 | { | |
8851 | /* A global or static variable may also have been stripped | |
8852 | out by the linker if unused, in which case its address | |
8853 | will be nullified; do not add such variables into partial | |
8854 | symbol table then. */ | |
8855 | } | |
8856 | else if (pdi->is_external) | |
c906108c SS |
8857 | { |
8858 | /* Global Variable. | |
8859 | Don't enter into the minimal symbol tables as there is | |
8860 | a minimal symbol table entry from the ELF symbols already. | |
8861 | Enter into partial symbol table if it has a location | |
8862 | descriptor or a type. | |
8863 | If the location descriptor is missing, new_symbol will create | |
8864 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8865 | be determined from the minimal symbol table whenever the variable | |
8866 | is referenced. | |
8867 | The address for the partial symbol table entry is not | |
8868 | used by GDB, but it comes in handy for debugging partial symbol | |
8869 | table building. */ | |
8870 | ||
95554aad | 8871 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8872 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8873 | built_actual_name != NULL, |
f47fb265 MS |
8874 | VAR_DOMAIN, LOC_STATIC, |
8875 | &objfile->global_psymbols, | |
1762568f | 8876 | addr + baseaddr, |
f47fb265 | 8877 | cu->language, objfile); |
c906108c SS |
8878 | } |
8879 | else | |
8880 | { | |
ff908ebf AW |
8881 | int has_loc = pdi->d.locdesc != NULL; |
8882 | ||
8883 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8884 | without location descriptors or constant values). */ | |
8885 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 8886 | { |
15d034d0 | 8887 | xfree (built_actual_name); |
decbce07 MS |
8888 | return; |
8889 | } | |
ff908ebf | 8890 | |
f47fb265 | 8891 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8892 | built_actual_name != NULL, |
f47fb265 MS |
8893 | VAR_DOMAIN, LOC_STATIC, |
8894 | &objfile->static_psymbols, | |
ff908ebf | 8895 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 8896 | cu->language, objfile); |
c906108c SS |
8897 | } |
8898 | break; | |
8899 | case DW_TAG_typedef: | |
8900 | case DW_TAG_base_type: | |
a02abb62 | 8901 | case DW_TAG_subrange_type: |
38d518c9 | 8902 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8903 | built_actual_name != NULL, |
176620f1 | 8904 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 8905 | &objfile->static_psymbols, |
1762568f | 8906 | 0, cu->language, objfile); |
c906108c | 8907 | break; |
74921315 | 8908 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
8909 | case DW_TAG_namespace: |
8910 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 8911 | built_actual_name != NULL, |
72bf9492 DJ |
8912 | VAR_DOMAIN, LOC_TYPEDEF, |
8913 | &objfile->global_psymbols, | |
1762568f | 8914 | 0, cu->language, objfile); |
72bf9492 | 8915 | break; |
530e8392 KB |
8916 | case DW_TAG_module: |
8917 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
8918 | built_actual_name != NULL, | |
8919 | MODULE_DOMAIN, LOC_TYPEDEF, | |
8920 | &objfile->global_psymbols, | |
1762568f | 8921 | 0, cu->language, objfile); |
530e8392 | 8922 | break; |
c906108c | 8923 | case DW_TAG_class_type: |
680b30c7 | 8924 | case DW_TAG_interface_type: |
c906108c SS |
8925 | case DW_TAG_structure_type: |
8926 | case DW_TAG_union_type: | |
8927 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8928 | /* Skip external references. The DWARF standard says in the section |
8929 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8930 | structure, union or class type is represented by a structure, | |
8931 | union or class entry that does not have a byte size attribute | |
8932 | and that has a DW_AT_declaration attribute." */ | |
8933 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 8934 | { |
15d034d0 | 8935 | xfree (built_actual_name); |
decbce07 MS |
8936 | return; |
8937 | } | |
fa4028e9 | 8938 | |
63d06c5c DC |
8939 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8940 | static vs. global. */ | |
38d518c9 | 8941 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8942 | built_actual_name != NULL, |
176620f1 | 8943 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 8944 | cu->language == language_cplus |
63d06c5c DC |
8945 | ? &objfile->global_psymbols |
8946 | : &objfile->static_psymbols, | |
1762568f | 8947 | 0, cu->language, objfile); |
c906108c | 8948 | |
c906108c SS |
8949 | break; |
8950 | case DW_TAG_enumerator: | |
38d518c9 | 8951 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8952 | built_actual_name != NULL, |
176620f1 | 8953 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 8954 | cu->language == language_cplus |
f6fe98ef DJ |
8955 | ? &objfile->global_psymbols |
8956 | : &objfile->static_psymbols, | |
1762568f | 8957 | 0, cu->language, objfile); |
c906108c SS |
8958 | break; |
8959 | default: | |
8960 | break; | |
8961 | } | |
5c4e30ca | 8962 | |
15d034d0 | 8963 | xfree (built_actual_name); |
c906108c SS |
8964 | } |
8965 | ||
5c4e30ca DC |
8966 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8967 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8968 | the name of the enclosing namespace. */ | |
91c24f0a | 8969 | |
72bf9492 DJ |
8970 | static void |
8971 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8972 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8973 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8974 | { |
72bf9492 | 8975 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8976 | |
72bf9492 | 8977 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8978 | |
8979 | /* Now scan partial symbols in that namespace. */ | |
8980 | ||
91c24f0a | 8981 | if (pdi->has_children) |
cdc07690 | 8982 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8983 | } |
8984 | ||
5d7cb8df JK |
8985 | /* Read a partial die corresponding to a Fortran module. */ |
8986 | ||
8987 | static void | |
8988 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8989 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8990 | { |
530e8392 KB |
8991 | /* Add a symbol for the namespace. */ |
8992 | ||
8993 | add_partial_symbol (pdi, cu); | |
8994 | ||
f55ee35c | 8995 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8996 | |
8997 | if (pdi->has_children) | |
cdc07690 | 8998 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8999 | } |
9000 | ||
b1dc1806 XR |
9001 | /* Read a partial die corresponding to a subprogram or an inlined |
9002 | subprogram and create a partial symbol for that subprogram. | |
9003 | When the CU language allows it, this routine also defines a partial | |
9004 | symbol for each nested subprogram that this subprogram contains. | |
9005 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
9006 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 9007 | |
cdc07690 YQ |
9008 | PDI may also be a lexical block, in which case we simply search |
9009 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
9010 | Again, this is only performed when the CU language allows this |
9011 | type of definitions. */ | |
9012 | ||
9013 | static void | |
9014 | add_partial_subprogram (struct partial_die_info *pdi, | |
9015 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 9016 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 9017 | { |
b1dc1806 | 9018 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
9019 | { |
9020 | if (pdi->has_pc_info) | |
9021 | { | |
9022 | if (pdi->lowpc < *lowpc) | |
9023 | *lowpc = pdi->lowpc; | |
9024 | if (pdi->highpc > *highpc) | |
9025 | *highpc = pdi->highpc; | |
cdc07690 | 9026 | if (set_addrmap) |
5734ee8b | 9027 | { |
518817b3 | 9028 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
9029 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9030 | CORE_ADDR baseaddr; | |
9031 | CORE_ADDR highpc; | |
9032 | CORE_ADDR lowpc; | |
5734ee8b DJ |
9033 | |
9034 | baseaddr = ANOFFSET (objfile->section_offsets, | |
9035 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
9036 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
9037 | pdi->lowpc + baseaddr); | |
9038 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
9039 | pdi->highpc + baseaddr); | |
9040 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 9041 | cu->per_cu->v.psymtab); |
5734ee8b | 9042 | } |
481860b3 GB |
9043 | } |
9044 | ||
9045 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
9046 | { | |
bc30ff58 | 9047 | if (!pdi->is_declaration) |
e8d05480 JB |
9048 | /* Ignore subprogram DIEs that do not have a name, they are |
9049 | illegal. Do not emit a complaint at this point, we will | |
9050 | do so when we convert this psymtab into a symtab. */ | |
9051 | if (pdi->name) | |
9052 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
9053 | } |
9054 | } | |
6e70227d | 9055 | |
bc30ff58 JB |
9056 | if (! pdi->has_children) |
9057 | return; | |
9058 | ||
9059 | if (cu->language == language_ada) | |
9060 | { | |
9061 | pdi = pdi->die_child; | |
9062 | while (pdi != NULL) | |
9063 | { | |
52356b79 | 9064 | pdi->fixup (cu); |
bc30ff58 | 9065 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 9066 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 9067 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 9068 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
9069 | pdi = pdi->die_sibling; |
9070 | } | |
9071 | } | |
9072 | } | |
9073 | ||
91c24f0a DC |
9074 | /* Read a partial die corresponding to an enumeration type. */ |
9075 | ||
72bf9492 DJ |
9076 | static void |
9077 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
9078 | struct dwarf2_cu *cu) | |
91c24f0a | 9079 | { |
72bf9492 | 9080 | struct partial_die_info *pdi; |
91c24f0a DC |
9081 | |
9082 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
9083 | add_partial_symbol (enum_pdi, cu); |
9084 | ||
9085 | pdi = enum_pdi->die_child; | |
9086 | while (pdi) | |
91c24f0a | 9087 | { |
72bf9492 | 9088 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 9089 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 9090 | else |
72bf9492 DJ |
9091 | add_partial_symbol (pdi, cu); |
9092 | pdi = pdi->die_sibling; | |
91c24f0a | 9093 | } |
91c24f0a DC |
9094 | } |
9095 | ||
6caca83c CC |
9096 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
9097 | ||
9098 | static unsigned int | |
d521ce57 | 9099 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
9100 | { |
9101 | unsigned int bytes_read; | |
9102 | ||
9103 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9104 | } | |
9105 | ||
685af9cd TT |
9106 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
9107 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
9108 | ||
4bb7a0a7 DJ |
9109 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
9110 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
9111 | the initial number. */ | |
9112 | ||
9113 | static struct abbrev_info * | |
685af9cd TT |
9114 | peek_die_abbrev (const die_reader_specs &reader, |
9115 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 9116 | { |
685af9cd | 9117 | dwarf2_cu *cu = reader.cu; |
518817b3 | 9118 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
9119 | unsigned int abbrev_number |
9120 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
9121 | |
9122 | if (abbrev_number == 0) | |
9123 | return NULL; | |
9124 | ||
685af9cd | 9125 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
9126 | if (!abbrev) |
9127 | { | |
422b9917 | 9128 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 9129 | " at offset %s [in module %s]"), |
422b9917 | 9130 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 9131 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
9132 | } |
9133 | ||
9134 | return abbrev; | |
9135 | } | |
9136 | ||
93311388 DE |
9137 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9138 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
9139 | DIE. Any children of the skipped DIEs will also be skipped. */ |
9140 | ||
d521ce57 TT |
9141 | static const gdb_byte * |
9142 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 9143 | { |
4bb7a0a7 DJ |
9144 | while (1) |
9145 | { | |
685af9cd TT |
9146 | unsigned int bytes_read; |
9147 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
9148 | ||
4bb7a0a7 DJ |
9149 | if (abbrev == NULL) |
9150 | return info_ptr + bytes_read; | |
9151 | else | |
dee91e82 | 9152 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
9153 | } |
9154 | } | |
9155 | ||
93311388 DE |
9156 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9157 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
9158 | abbrev corresponding to that skipped uleb128 should be passed in |
9159 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
9160 | children. */ | |
9161 | ||
d521ce57 TT |
9162 | static const gdb_byte * |
9163 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 9164 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
9165 | { |
9166 | unsigned int bytes_read; | |
9167 | struct attribute attr; | |
dee91e82 DE |
9168 | bfd *abfd = reader->abfd; |
9169 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 9170 | const gdb_byte *buffer = reader->buffer; |
f664829e | 9171 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
9172 | unsigned int form, i; |
9173 | ||
9174 | for (i = 0; i < abbrev->num_attrs; i++) | |
9175 | { | |
9176 | /* The only abbrev we care about is DW_AT_sibling. */ | |
9177 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
9178 | { | |
dee91e82 | 9179 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 9180 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 9181 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 9182 | else |
b9502d3f | 9183 | { |
9c541725 PA |
9184 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
9185 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
9186 | |
9187 | if (sibling_ptr < info_ptr) | |
b98664d3 | 9188 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
9189 | else if (sibling_ptr > reader->buffer_end) |
9190 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
9191 | else |
9192 | return sibling_ptr; | |
9193 | } | |
4bb7a0a7 DJ |
9194 | } |
9195 | ||
9196 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
9197 | form = abbrev->attrs[i].form; | |
9198 | skip_attribute: | |
9199 | switch (form) | |
9200 | { | |
4bb7a0a7 | 9201 | case DW_FORM_ref_addr: |
ae411497 TT |
9202 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
9203 | and later it is offset sized. */ | |
9204 | if (cu->header.version == 2) | |
9205 | info_ptr += cu->header.addr_size; | |
9206 | else | |
9207 | info_ptr += cu->header.offset_size; | |
9208 | break; | |
36586728 TT |
9209 | case DW_FORM_GNU_ref_alt: |
9210 | info_ptr += cu->header.offset_size; | |
9211 | break; | |
ae411497 | 9212 | case DW_FORM_addr: |
4bb7a0a7 DJ |
9213 | info_ptr += cu->header.addr_size; |
9214 | break; | |
9215 | case DW_FORM_data1: | |
9216 | case DW_FORM_ref1: | |
9217 | case DW_FORM_flag: | |
9218 | info_ptr += 1; | |
9219 | break; | |
2dc7f7b3 | 9220 | case DW_FORM_flag_present: |
43988095 | 9221 | case DW_FORM_implicit_const: |
2dc7f7b3 | 9222 | break; |
4bb7a0a7 DJ |
9223 | case DW_FORM_data2: |
9224 | case DW_FORM_ref2: | |
9225 | info_ptr += 2; | |
9226 | break; | |
9227 | case DW_FORM_data4: | |
9228 | case DW_FORM_ref4: | |
9229 | info_ptr += 4; | |
9230 | break; | |
9231 | case DW_FORM_data8: | |
9232 | case DW_FORM_ref8: | |
55f1336d | 9233 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
9234 | info_ptr += 8; |
9235 | break; | |
0224619f JK |
9236 | case DW_FORM_data16: |
9237 | info_ptr += 16; | |
9238 | break; | |
4bb7a0a7 | 9239 | case DW_FORM_string: |
9b1c24c8 | 9240 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
9241 | info_ptr += bytes_read; |
9242 | break; | |
2dc7f7b3 | 9243 | case DW_FORM_sec_offset: |
4bb7a0a7 | 9244 | case DW_FORM_strp: |
36586728 | 9245 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
9246 | info_ptr += cu->header.offset_size; |
9247 | break; | |
2dc7f7b3 | 9248 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
9249 | case DW_FORM_block: |
9250 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9251 | info_ptr += bytes_read; | |
9252 | break; | |
9253 | case DW_FORM_block1: | |
9254 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
9255 | break; | |
9256 | case DW_FORM_block2: | |
9257 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
9258 | break; | |
9259 | case DW_FORM_block4: | |
9260 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
9261 | break; | |
9262 | case DW_FORM_sdata: | |
9263 | case DW_FORM_udata: | |
9264 | case DW_FORM_ref_udata: | |
3019eac3 DE |
9265 | case DW_FORM_GNU_addr_index: |
9266 | case DW_FORM_GNU_str_index: | |
d521ce57 | 9267 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
9268 | break; |
9269 | case DW_FORM_indirect: | |
9270 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9271 | info_ptr += bytes_read; | |
9272 | /* We need to continue parsing from here, so just go back to | |
9273 | the top. */ | |
9274 | goto skip_attribute; | |
9275 | ||
9276 | default: | |
3e43a32a MS |
9277 | error (_("Dwarf Error: Cannot handle %s " |
9278 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
9279 | dwarf_form_name (form), |
9280 | bfd_get_filename (abfd)); | |
9281 | } | |
9282 | } | |
9283 | ||
9284 | if (abbrev->has_children) | |
dee91e82 | 9285 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
9286 | else |
9287 | return info_ptr; | |
9288 | } | |
9289 | ||
93311388 | 9290 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 9291 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 9292 | |
d521ce57 | 9293 | static const gdb_byte * |
dee91e82 DE |
9294 | locate_pdi_sibling (const struct die_reader_specs *reader, |
9295 | struct partial_die_info *orig_pdi, | |
d521ce57 | 9296 | const gdb_byte *info_ptr) |
91c24f0a DC |
9297 | { |
9298 | /* Do we know the sibling already? */ | |
72bf9492 | 9299 | |
91c24f0a DC |
9300 | if (orig_pdi->sibling) |
9301 | return orig_pdi->sibling; | |
9302 | ||
9303 | /* Are there any children to deal with? */ | |
9304 | ||
9305 | if (!orig_pdi->has_children) | |
9306 | return info_ptr; | |
9307 | ||
4bb7a0a7 | 9308 | /* Skip the children the long way. */ |
91c24f0a | 9309 | |
dee91e82 | 9310 | return skip_children (reader, info_ptr); |
91c24f0a DC |
9311 | } |
9312 | ||
257e7a09 | 9313 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 9314 | not NULL. */ |
c906108c SS |
9315 | |
9316 | static void | |
257e7a09 YQ |
9317 | dwarf2_read_symtab (struct partial_symtab *self, |
9318 | struct objfile *objfile) | |
c906108c | 9319 | { |
ed2dc618 SM |
9320 | struct dwarf2_per_objfile *dwarf2_per_objfile |
9321 | = get_dwarf2_per_objfile (objfile); | |
9322 | ||
257e7a09 | 9323 | if (self->readin) |
c906108c | 9324 | { |
442e4d9c | 9325 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 9326 | self->filename); |
442e4d9c YQ |
9327 | } |
9328 | else | |
9329 | { | |
9330 | if (info_verbose) | |
c906108c | 9331 | { |
442e4d9c | 9332 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 9333 | self->filename); |
442e4d9c | 9334 | gdb_flush (gdb_stdout); |
c906108c | 9335 | } |
c906108c | 9336 | |
442e4d9c YQ |
9337 | /* If this psymtab is constructed from a debug-only objfile, the |
9338 | has_section_at_zero flag will not necessarily be correct. We | |
9339 | can get the correct value for this flag by looking at the data | |
9340 | associated with the (presumably stripped) associated objfile. */ | |
9341 | if (objfile->separate_debug_objfile_backlink) | |
9342 | { | |
9343 | struct dwarf2_per_objfile *dpo_backlink | |
ed2dc618 | 9344 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
9a619af0 | 9345 | |
442e4d9c YQ |
9346 | dwarf2_per_objfile->has_section_at_zero |
9347 | = dpo_backlink->has_section_at_zero; | |
9348 | } | |
b2ab525c | 9349 | |
442e4d9c | 9350 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 9351 | |
257e7a09 | 9352 | psymtab_to_symtab_1 (self); |
c906108c | 9353 | |
442e4d9c YQ |
9354 | /* Finish up the debug error message. */ |
9355 | if (info_verbose) | |
9356 | printf_filtered (_("done.\n")); | |
c906108c | 9357 | } |
95554aad | 9358 | |
ed2dc618 | 9359 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 9360 | } |
9cdd5dbd DE |
9361 | \f |
9362 | /* Reading in full CUs. */ | |
c906108c | 9363 | |
10b3939b DJ |
9364 | /* Add PER_CU to the queue. */ |
9365 | ||
9366 | static void | |
95554aad TT |
9367 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9368 | enum language pretend_language) | |
10b3939b DJ |
9369 | { |
9370 | struct dwarf2_queue_item *item; | |
9371 | ||
9372 | per_cu->queued = 1; | |
8d749320 | 9373 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 9374 | item->per_cu = per_cu; |
95554aad | 9375 | item->pretend_language = pretend_language; |
10b3939b DJ |
9376 | item->next = NULL; |
9377 | ||
9378 | if (dwarf2_queue == NULL) | |
9379 | dwarf2_queue = item; | |
9380 | else | |
9381 | dwarf2_queue_tail->next = item; | |
9382 | ||
9383 | dwarf2_queue_tail = item; | |
9384 | } | |
9385 | ||
89e63ee4 DE |
9386 | /* If PER_CU is not yet queued, add it to the queue. |
9387 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
9388 | dependency. | |
0907af0c | 9389 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
9390 | meaning either PER_CU is already queued or it is already loaded. |
9391 | ||
9392 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
9393 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
9394 | |
9395 | static int | |
89e63ee4 | 9396 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
9397 | struct dwarf2_per_cu_data *per_cu, |
9398 | enum language pretend_language) | |
9399 | { | |
9400 | /* We may arrive here during partial symbol reading, if we need full | |
9401 | DIEs to process an unusual case (e.g. template arguments). Do | |
9402 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 9403 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
9404 | { |
9405 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
9406 | return 1; | |
9407 | return 0; | |
9408 | } | |
9409 | ||
9410 | /* Mark the dependence relation so that we don't flush PER_CU | |
9411 | too early. */ | |
89e63ee4 DE |
9412 | if (dependent_cu != NULL) |
9413 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
9414 | |
9415 | /* If it's already on the queue, we have nothing to do. */ | |
9416 | if (per_cu->queued) | |
9417 | return 0; | |
9418 | ||
9419 | /* If the compilation unit is already loaded, just mark it as | |
9420 | used. */ | |
9421 | if (per_cu->cu != NULL) | |
9422 | { | |
9423 | per_cu->cu->last_used = 0; | |
9424 | return 0; | |
9425 | } | |
9426 | ||
9427 | /* Add it to the queue. */ | |
9428 | queue_comp_unit (per_cu, pretend_language); | |
9429 | ||
9430 | return 1; | |
9431 | } | |
9432 | ||
10b3939b DJ |
9433 | /* Process the queue. */ |
9434 | ||
9435 | static void | |
ed2dc618 | 9436 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b DJ |
9437 | { |
9438 | struct dwarf2_queue_item *item, *next_item; | |
9439 | ||
b4f54984 | 9440 | if (dwarf_read_debug) |
45cfd468 DE |
9441 | { |
9442 | fprintf_unfiltered (gdb_stdlog, | |
9443 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 9444 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
9445 | } |
9446 | ||
03dd20cc DJ |
9447 | /* The queue starts out with one item, but following a DIE reference |
9448 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
9449 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
9450 | { | |
cc12ce38 DE |
9451 | if ((dwarf2_per_objfile->using_index |
9452 | ? !item->per_cu->v.quick->compunit_symtab | |
9453 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
9454 | /* Skip dummy CUs. */ | |
9455 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
9456 | { |
9457 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 9458 | unsigned int debug_print_threshold; |
247f5c4f | 9459 | char buf[100]; |
f4dc4d17 | 9460 | |
247f5c4f | 9461 | if (per_cu->is_debug_types) |
f4dc4d17 | 9462 | { |
247f5c4f DE |
9463 | struct signatured_type *sig_type = |
9464 | (struct signatured_type *) per_cu; | |
9465 | ||
9d8780f0 | 9466 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 9467 | hex_string (sig_type->signature), |
9d8780f0 | 9468 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
9469 | /* There can be 100s of TUs. |
9470 | Only print them in verbose mode. */ | |
9471 | debug_print_threshold = 2; | |
f4dc4d17 | 9472 | } |
247f5c4f | 9473 | else |
73be47f5 | 9474 | { |
9d8780f0 SM |
9475 | sprintf (buf, "CU at offset %s", |
9476 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
9477 | debug_print_threshold = 1; |
9478 | } | |
247f5c4f | 9479 | |
b4f54984 | 9480 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9481 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
9482 | |
9483 | if (per_cu->is_debug_types) | |
9484 | process_full_type_unit (per_cu, item->pretend_language); | |
9485 | else | |
9486 | process_full_comp_unit (per_cu, item->pretend_language); | |
9487 | ||
b4f54984 | 9488 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9489 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 9490 | } |
10b3939b DJ |
9491 | |
9492 | item->per_cu->queued = 0; | |
9493 | next_item = item->next; | |
9494 | xfree (item); | |
9495 | } | |
9496 | ||
9497 | dwarf2_queue_tail = NULL; | |
45cfd468 | 9498 | |
b4f54984 | 9499 | if (dwarf_read_debug) |
45cfd468 DE |
9500 | { |
9501 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 9502 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 9503 | } |
10b3939b DJ |
9504 | } |
9505 | ||
10b3939b DJ |
9506 | /* Read in full symbols for PST, and anything it depends on. */ |
9507 | ||
c906108c | 9508 | static void |
fba45db2 | 9509 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 9510 | { |
10b3939b | 9511 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
9512 | int i; |
9513 | ||
95554aad TT |
9514 | if (pst->readin) |
9515 | return; | |
9516 | ||
aaa75496 | 9517 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
9518 | if (!pst->dependencies[i]->readin |
9519 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
9520 | { |
9521 | /* Inform about additional files that need to be read in. */ | |
9522 | if (info_verbose) | |
9523 | { | |
a3f17187 | 9524 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
9525 | fputs_filtered (" ", gdb_stdout); |
9526 | wrap_here (""); | |
9527 | fputs_filtered ("and ", gdb_stdout); | |
9528 | wrap_here (""); | |
9529 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 9530 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
9531 | gdb_flush (gdb_stdout); |
9532 | } | |
9533 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
9534 | } | |
9535 | ||
9a3c8263 | 9536 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
9537 | |
9538 | if (per_cu == NULL) | |
aaa75496 JB |
9539 | { |
9540 | /* It's an include file, no symbols to read for it. | |
9541 | Everything is in the parent symtab. */ | |
9542 | pst->readin = 1; | |
9543 | return; | |
9544 | } | |
c906108c | 9545 | |
58f0c718 | 9546 | dw2_do_instantiate_symtab (per_cu, false); |
10b3939b DJ |
9547 | } |
9548 | ||
dee91e82 DE |
9549 | /* Trivial hash function for die_info: the hash value of a DIE |
9550 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 9551 | |
dee91e82 DE |
9552 | static hashval_t |
9553 | die_hash (const void *item) | |
10b3939b | 9554 | { |
9a3c8263 | 9555 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 9556 | |
9c541725 | 9557 | return to_underlying (die->sect_off); |
dee91e82 | 9558 | } |
63d06c5c | 9559 | |
dee91e82 DE |
9560 | /* Trivial comparison function for die_info structures: two DIEs |
9561 | are equal if they have the same offset. */ | |
98bfdba5 | 9562 | |
dee91e82 DE |
9563 | static int |
9564 | die_eq (const void *item_lhs, const void *item_rhs) | |
9565 | { | |
9a3c8263 SM |
9566 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
9567 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 9568 | |
9c541725 | 9569 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 9570 | } |
c906108c | 9571 | |
dee91e82 DE |
9572 | /* die_reader_func for load_full_comp_unit. |
9573 | This is identical to read_signatured_type_reader, | |
9574 | but is kept separate for now. */ | |
c906108c | 9575 | |
dee91e82 DE |
9576 | static void |
9577 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 9578 | const gdb_byte *info_ptr, |
dee91e82 DE |
9579 | struct die_info *comp_unit_die, |
9580 | int has_children, | |
9581 | void *data) | |
9582 | { | |
9583 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 9584 | enum language *language_ptr = (enum language *) data; |
6caca83c | 9585 | |
dee91e82 DE |
9586 | gdb_assert (cu->die_hash == NULL); |
9587 | cu->die_hash = | |
9588 | htab_create_alloc_ex (cu->header.length / 12, | |
9589 | die_hash, | |
9590 | die_eq, | |
9591 | NULL, | |
9592 | &cu->comp_unit_obstack, | |
9593 | hashtab_obstack_allocate, | |
9594 | dummy_obstack_deallocate); | |
e142c38c | 9595 | |
dee91e82 DE |
9596 | if (has_children) |
9597 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
9598 | &info_ptr, comp_unit_die); | |
9599 | cu->dies = comp_unit_die; | |
9600 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
9601 | |
9602 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 9603 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 9604 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
9605 | or we won't be able to build types correctly. |
9606 | Similarly, if we do not read the producer, we can not apply | |
9607 | producer-specific interpretation. */ | |
95554aad | 9608 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 9609 | } |
10b3939b | 9610 | |
dee91e82 | 9611 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 9612 | |
dee91e82 | 9613 | static void |
95554aad | 9614 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
58f0c718 | 9615 | bool skip_partial, |
95554aad | 9616 | enum language pretend_language) |
dee91e82 | 9617 | { |
3019eac3 | 9618 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 9619 | |
58f0c718 | 9620 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, skip_partial, |
f4dc4d17 | 9621 | load_full_comp_unit_reader, &pretend_language); |
10b3939b DJ |
9622 | } |
9623 | ||
3da10d80 KS |
9624 | /* Add a DIE to the delayed physname list. */ |
9625 | ||
9626 | static void | |
9627 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
9628 | const char *name, struct die_info *die, | |
9629 | struct dwarf2_cu *cu) | |
9630 | { | |
9631 | struct delayed_method_info mi; | |
9632 | mi.type = type; | |
9633 | mi.fnfield_index = fnfield_index; | |
9634 | mi.index = index; | |
9635 | mi.name = name; | |
9636 | mi.die = die; | |
c89b44cd | 9637 | cu->method_list.push_back (mi); |
3da10d80 KS |
9638 | } |
9639 | ||
3693fdb3 PA |
9640 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
9641 | "const" / "volatile". If so, decrements LEN by the length of the | |
9642 | modifier and return true. Otherwise return false. */ | |
9643 | ||
9644 | template<size_t N> | |
9645 | static bool | |
9646 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
9647 | { | |
9648 | size_t mod_len = sizeof (mod) - 1; | |
9649 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
9650 | { | |
9651 | len -= mod_len; | |
9652 | return true; | |
9653 | } | |
9654 | return false; | |
9655 | } | |
9656 | ||
3da10d80 KS |
9657 | /* Compute the physnames of any methods on the CU's method list. |
9658 | ||
9659 | The computation of method physnames is delayed in order to avoid the | |
9660 | (bad) condition that one of the method's formal parameters is of an as yet | |
9661 | incomplete type. */ | |
9662 | ||
9663 | static void | |
9664 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9665 | { | |
3693fdb3 | 9666 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9667 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9668 | return; |
9669 | gdb_assert (cu->language == language_cplus); | |
9670 | ||
52941706 | 9671 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9672 | { |
1d06ead6 | 9673 | const char *physname; |
3da10d80 | 9674 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9675 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9676 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9677 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9678 | = physname ? physname : ""; |
3693fdb3 PA |
9679 | |
9680 | /* Since there's no tag to indicate whether a method is a | |
9681 | const/volatile overload, extract that information out of the | |
9682 | demangled name. */ | |
9683 | if (physname != NULL) | |
9684 | { | |
9685 | size_t len = strlen (physname); | |
9686 | ||
9687 | while (1) | |
9688 | { | |
9689 | if (physname[len] == ')') /* shortcut */ | |
9690 | break; | |
9691 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9692 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9693 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9694 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9695 | else |
9696 | break; | |
9697 | } | |
9698 | } | |
3da10d80 | 9699 | } |
c89b44cd TT |
9700 | |
9701 | /* The list is no longer needed. */ | |
9702 | cu->method_list.clear (); | |
3da10d80 KS |
9703 | } |
9704 | ||
380618d6 KS |
9705 | /* A wrapper for add_symbol_to_list to ensure that SYMBOL's language is |
9706 | the same as all other symbols in LISTHEAD. If a new symbol is added | |
9707 | with a different language, this function asserts. */ | |
9708 | ||
9709 | static inline void | |
9710 | dw2_add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
9711 | { | |
9712 | /* Only assert if LISTHEAD already contains symbols of a different | |
9713 | language (dict_create_hashed/insert_symbol_hashed requires that all | |
9714 | symbols in this list are of the same language). */ | |
9715 | gdb_assert ((*listhead) == NULL | |
9716 | || (SYMBOL_LANGUAGE ((*listhead)->symbol[0]) | |
9717 | == SYMBOL_LANGUAGE (symbol))); | |
9718 | ||
9719 | add_symbol_to_list (symbol, listhead); | |
9720 | } | |
9721 | ||
a766d390 DE |
9722 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9723 | and it's not clear if/how imported objects will appear. | |
9724 | To keep Go support simple until that's worked out, | |
9725 | go back through what we've read and create something usable. | |
9726 | We could do this while processing each DIE, and feels kinda cleaner, | |
9727 | but that way is more invasive. | |
9728 | This is to, for example, allow the user to type "p var" or "b main" | |
9729 | without having to specify the package name, and allow lookups | |
9730 | of module.object to work in contexts that use the expression | |
9731 | parser. */ | |
9732 | ||
9733 | static void | |
9734 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9735 | { | |
9736 | char *package_name = NULL; | |
9737 | struct pending *list; | |
9738 | int i; | |
9739 | ||
804d2729 TT |
9740 | for (list = *cu->builder->get_global_symbols (); |
9741 | list != NULL; | |
9742 | list = list->next) | |
a766d390 DE |
9743 | { |
9744 | for (i = 0; i < list->nsyms; ++i) | |
9745 | { | |
9746 | struct symbol *sym = list->symbol[i]; | |
9747 | ||
9748 | if (SYMBOL_LANGUAGE (sym) == language_go | |
9749 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
9750 | { | |
9751 | char *this_package_name = go_symbol_package_name (sym); | |
9752 | ||
9753 | if (this_package_name == NULL) | |
9754 | continue; | |
9755 | if (package_name == NULL) | |
9756 | package_name = this_package_name; | |
9757 | else | |
9758 | { | |
518817b3 SM |
9759 | struct objfile *objfile |
9760 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
a766d390 | 9761 | if (strcmp (package_name, this_package_name) != 0) |
b98664d3 | 9762 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9763 | (symbol_symtab (sym) != NULL |
9764 | ? symtab_to_filename_for_display | |
9765 | (symbol_symtab (sym)) | |
e3b94546 | 9766 | : objfile_name (objfile)), |
a766d390 DE |
9767 | this_package_name, package_name); |
9768 | xfree (this_package_name); | |
9769 | } | |
9770 | } | |
9771 | } | |
9772 | } | |
9773 | ||
9774 | if (package_name != NULL) | |
9775 | { | |
518817b3 | 9776 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
34a68019 | 9777 | const char *saved_package_name |
224c3ddb SM |
9778 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
9779 | package_name, | |
9780 | strlen (package_name)); | |
19f392bc UW |
9781 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9782 | saved_package_name); | |
a766d390 DE |
9783 | struct symbol *sym; |
9784 | ||
e623cf5d | 9785 | sym = allocate_symbol (objfile); |
f85f34ed | 9786 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
9787 | SYMBOL_SET_NAMES (sym, saved_package_name, |
9788 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
9789 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9790 | e.g., "main" finds the "main" module and not C's main(). */ | |
9791 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9792 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9793 | SYMBOL_TYPE (sym) = type; |
9794 | ||
380618d6 | 9795 | dw2_add_symbol_to_list (sym, cu->builder->get_global_symbols ()); |
a766d390 DE |
9796 | |
9797 | xfree (package_name); | |
9798 | } | |
9799 | } | |
9800 | ||
c9317f21 TT |
9801 | /* Allocate a fully-qualified name consisting of the two parts on the |
9802 | obstack. */ | |
9803 | ||
9804 | static const char * | |
9805 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9806 | { | |
9807 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9808 | } | |
9809 | ||
9810 | /* A helper that allocates a struct discriminant_info to attach to a | |
9811 | union type. */ | |
9812 | ||
9813 | static struct discriminant_info * | |
9814 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9815 | int default_index) | |
9816 | { | |
9817 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9818 | gdb_assert (discriminant_index == -1 |
9819 | || (discriminant_index >= 0 | |
9820 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9821 | gdb_assert (default_index == -1 |
c7b15a66 | 9822 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9823 | |
9824 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9825 | ||
9826 | struct discriminant_info *disc | |
9827 | = ((struct discriminant_info *) | |
9828 | TYPE_ZALLOC (type, | |
9829 | offsetof (struct discriminant_info, discriminants) | |
9830 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9831 | disc->default_index = default_index; | |
9832 | disc->discriminant_index = discriminant_index; | |
9833 | ||
9834 | struct dynamic_prop prop; | |
9835 | prop.kind = PROP_UNDEFINED; | |
9836 | prop.data.baton = disc; | |
9837 | ||
9838 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9839 | ||
9840 | return disc; | |
9841 | } | |
9842 | ||
9843 | /* Some versions of rustc emitted enums in an unusual way. | |
9844 | ||
9845 | Ordinary enums were emitted as unions. The first element of each | |
9846 | structure in the union was named "RUST$ENUM$DISR". This element | |
9847 | held the discriminant. | |
9848 | ||
9849 | These versions of Rust also implemented the "non-zero" | |
9850 | optimization. When the enum had two values, and one is empty and | |
9851 | the other holds a pointer that cannot be zero, the pointer is used | |
9852 | as the discriminant, with a zero value meaning the empty variant. | |
9853 | Here, the union's first member is of the form | |
9854 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9855 | where the fieldnos are the indices of the fields that should be | |
9856 | traversed in order to find the field (which may be several fields deep) | |
9857 | and the variantname is the name of the variant of the case when the | |
9858 | field is zero. | |
9859 | ||
9860 | This function recognizes whether TYPE is of one of these forms, | |
9861 | and, if so, smashes it to be a variant type. */ | |
9862 | ||
9863 | static void | |
9864 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9865 | { | |
9866 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9867 | ||
9868 | /* We don't need to deal with empty enums. */ | |
9869 | if (TYPE_NFIELDS (type) == 0) | |
9870 | return; | |
9871 | ||
9872 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9873 | if (TYPE_NFIELDS (type) == 1 | |
9874 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9875 | { | |
9876 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9877 | ||
9878 | /* Decode the field name to find the offset of the | |
9879 | discriminant. */ | |
9880 | ULONGEST bit_offset = 0; | |
9881 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9882 | while (name[0] >= '0' && name[0] <= '9') | |
9883 | { | |
9884 | char *tail; | |
9885 | unsigned long index = strtoul (name, &tail, 10); | |
9886 | name = tail; | |
9887 | if (*name != '$' | |
9888 | || index >= TYPE_NFIELDS (field_type) | |
9889 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9890 | != FIELD_LOC_KIND_BITPOS)) | |
9891 | { | |
b98664d3 | 9892 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9893 | "[in module %s]"), |
9894 | TYPE_FIELD_NAME (type, 0), | |
9895 | objfile_name (objfile)); | |
9896 | return; | |
9897 | } | |
9898 | ++name; | |
9899 | ||
9900 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9901 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9902 | } | |
9903 | ||
9904 | /* Make a union to hold the variants. */ | |
9905 | struct type *union_type = alloc_type (objfile); | |
9906 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9907 | TYPE_NFIELDS (union_type) = 3; | |
9908 | TYPE_FIELDS (union_type) | |
9909 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
9910 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9911 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9912 | |
9913 | /* Put the discriminant must at index 0. */ | |
9914 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
9915 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9916 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9917 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
9918 | ||
9919 | /* The order of fields doesn't really matter, so put the real | |
9920 | field at index 1 and the data-less field at index 2. */ | |
9921 | struct discriminant_info *disc | |
9922 | = alloc_discriminant_info (union_type, 0, 1); | |
9923 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
9924 | TYPE_FIELD_NAME (union_type, 1) | |
9925 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
9926 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
9927 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9928 | TYPE_FIELD_NAME (union_type, 1)); | |
9929 | ||
9930 | const char *dataless_name | |
9931 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9932 | name); | |
9933 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9934 | dataless_name); | |
9935 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
9936 | /* NAME points into the original discriminant name, which | |
9937 | already has the correct lifetime. */ | |
9938 | TYPE_FIELD_NAME (union_type, 2) = name; | |
9939 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
9940 | disc->discriminants[2] = 0; | |
9941 | ||
9942 | /* Smash this type to be a structure type. We have to do this | |
9943 | because the type has already been recorded. */ | |
9944 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9945 | TYPE_NFIELDS (type) = 1; | |
9946 | TYPE_FIELDS (type) | |
9947 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
9948 | ||
9949 | /* Install the variant part. */ | |
9950 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9951 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9952 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9953 | } | |
9954 | else if (TYPE_NFIELDS (type) == 1) | |
9955 | { | |
9956 | /* We assume that a union with a single field is a univariant | |
9957 | enum. */ | |
9958 | /* Smash this type to be a structure type. We have to do this | |
9959 | because the type has already been recorded. */ | |
9960 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9961 | ||
9962 | /* Make a union to hold the variants. */ | |
9963 | struct type *union_type = alloc_type (objfile); | |
9964 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9965 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
9966 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9967 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9968 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
9969 | ||
9970 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
9971 | const char *variant_name | |
9972 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
9973 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
9974 | TYPE_NAME (field_type) | |
9975 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 9976 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
9977 | |
9978 | /* Install the union in the outer struct type. */ | |
9979 | TYPE_NFIELDS (type) = 1; | |
9980 | TYPE_FIELDS (type) | |
9981 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
9982 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9983 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9984 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9985 | ||
9986 | alloc_discriminant_info (union_type, -1, 0); | |
9987 | } | |
9988 | else | |
9989 | { | |
9990 | struct type *disr_type = nullptr; | |
9991 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9992 | { | |
9993 | disr_type = TYPE_FIELD_TYPE (type, i); | |
9994 | ||
a037790e TT |
9995 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
9996 | { | |
9997 | /* All fields of a true enum will be structs. */ | |
9998 | return; | |
9999 | } | |
10000 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
10001 | { |
10002 | /* Could be data-less variant, so keep going. */ | |
a037790e | 10003 | disr_type = nullptr; |
c9317f21 TT |
10004 | } |
10005 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
10006 | "RUST$ENUM$DISR") != 0) | |
10007 | { | |
10008 | /* Not a Rust enum. */ | |
10009 | return; | |
10010 | } | |
10011 | else | |
10012 | { | |
10013 | /* Found one. */ | |
10014 | break; | |
10015 | } | |
10016 | } | |
10017 | ||
10018 | /* If we got here without a discriminant, then it's probably | |
10019 | just a union. */ | |
10020 | if (disr_type == nullptr) | |
10021 | return; | |
10022 | ||
10023 | /* Smash this type to be a structure type. We have to do this | |
10024 | because the type has already been recorded. */ | |
10025 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10026 | ||
10027 | /* Make a union to hold the variants. */ | |
10028 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
10029 | struct type *union_type = alloc_type (objfile); | |
10030 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10031 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
10032 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10033 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10034 | TYPE_FIELDS (union_type) |
10035 | = (struct field *) TYPE_ZALLOC (union_type, | |
10036 | (TYPE_NFIELDS (union_type) | |
10037 | * sizeof (struct field))); | |
10038 | ||
10039 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
10040 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
10041 | ||
10042 | /* Install the discriminant at index 0 in the union. */ | |
10043 | TYPE_FIELD (union_type, 0) = *disr_field; | |
10044 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10045 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10046 | ||
10047 | /* Install the union in the outer struct type. */ | |
10048 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10049 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10050 | TYPE_NFIELDS (type) = 1; | |
10051 | ||
10052 | /* Set the size and offset of the union type. */ | |
10053 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10054 | ||
10055 | /* We need a way to find the correct discriminant given a | |
10056 | variant name. For convenience we build a map here. */ | |
10057 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
10058 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
10059 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
10060 | { | |
10061 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
10062 | { | |
10063 | const char *name | |
10064 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
10065 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
10066 | } | |
10067 | } | |
10068 | ||
10069 | int n_fields = TYPE_NFIELDS (union_type); | |
10070 | struct discriminant_info *disc | |
10071 | = alloc_discriminant_info (union_type, 0, -1); | |
10072 | /* Skip the discriminant here. */ | |
10073 | for (int i = 1; i < n_fields; ++i) | |
10074 | { | |
10075 | /* Find the final word in the name of this variant's type. | |
10076 | That name can be used to look up the correct | |
10077 | discriminant. */ | |
10078 | const char *variant_name | |
10079 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
10080 | i))); | |
10081 | ||
10082 | auto iter = discriminant_map.find (variant_name); | |
10083 | if (iter != discriminant_map.end ()) | |
10084 | disc->discriminants[i] = iter->second; | |
10085 | ||
bedda9ac | 10086 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 10087 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
10088 | if (TYPE_NFIELDS (sub_type) > 0) |
10089 | { | |
10090 | --TYPE_NFIELDS (sub_type); | |
10091 | ++TYPE_FIELDS (sub_type); | |
10092 | } | |
c9317f21 TT |
10093 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
10094 | TYPE_NAME (sub_type) | |
10095 | = rust_fully_qualify (&objfile->objfile_obstack, | |
10096 | TYPE_NAME (type), variant_name); | |
10097 | } | |
10098 | } | |
10099 | } | |
10100 | ||
10101 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
10102 | ||
10103 | static void | |
10104 | rust_union_quirks (struct dwarf2_cu *cu) | |
10105 | { | |
10106 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
10107 | for (type *type_ : cu->rust_unions) |
10108 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
10109 | /* We don't need this any more. */ |
10110 | cu->rust_unions.clear (); | |
c9317f21 TT |
10111 | } |
10112 | ||
95554aad TT |
10113 | /* Return the symtab for PER_CU. This works properly regardless of |
10114 | whether we're using the index or psymtabs. */ | |
10115 | ||
43f3e411 DE |
10116 | static struct compunit_symtab * |
10117 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 10118 | { |
ed2dc618 | 10119 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
10120 | ? per_cu->v.quick->compunit_symtab |
10121 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
10122 | } |
10123 | ||
10124 | /* A helper function for computing the list of all symbol tables | |
10125 | included by PER_CU. */ | |
10126 | ||
10127 | static void | |
43f3e411 | 10128 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 10129 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 10130 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 10131 | struct compunit_symtab *immediate_parent) |
95554aad TT |
10132 | { |
10133 | void **slot; | |
10134 | int ix; | |
43f3e411 | 10135 | struct compunit_symtab *cust; |
95554aad TT |
10136 | struct dwarf2_per_cu_data *iter; |
10137 | ||
10138 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
10139 | if (*slot != NULL) | |
10140 | { | |
10141 | /* This inclusion and its children have been processed. */ | |
10142 | return; | |
10143 | } | |
10144 | ||
10145 | *slot = per_cu; | |
10146 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
10147 | cust = get_compunit_symtab (per_cu); |
10148 | if (cust != NULL) | |
ec94af83 DE |
10149 | { |
10150 | /* If this is a type unit only add its symbol table if we haven't | |
10151 | seen it yet (type unit per_cu's can share symtabs). */ | |
10152 | if (per_cu->is_debug_types) | |
10153 | { | |
43f3e411 | 10154 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
10155 | if (*slot == NULL) |
10156 | { | |
43f3e411 DE |
10157 | *slot = cust; |
10158 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
10159 | if (cust->user == NULL) | |
10160 | cust->user = immediate_parent; | |
ec94af83 DE |
10161 | } |
10162 | } | |
10163 | else | |
f9125b6c | 10164 | { |
43f3e411 DE |
10165 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
10166 | if (cust->user == NULL) | |
10167 | cust->user = immediate_parent; | |
f9125b6c | 10168 | } |
ec94af83 | 10169 | } |
95554aad TT |
10170 | |
10171 | for (ix = 0; | |
796a7ff8 | 10172 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 10173 | ++ix) |
ec94af83 DE |
10174 | { |
10175 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 10176 | all_type_symtabs, iter, cust); |
ec94af83 | 10177 | } |
95554aad TT |
10178 | } |
10179 | ||
43f3e411 | 10180 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
10181 | PER_CU. */ |
10182 | ||
10183 | static void | |
43f3e411 | 10184 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 10185 | { |
f4dc4d17 DE |
10186 | gdb_assert (! per_cu->is_debug_types); |
10187 | ||
796a7ff8 | 10188 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
10189 | { |
10190 | int ix, len; | |
ec94af83 | 10191 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
10192 | struct compunit_symtab *compunit_symtab_iter; |
10193 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 10194 | htab_t all_children, all_type_symtabs; |
43f3e411 | 10195 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
10196 | |
10197 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 10198 | if (cust == NULL) |
95554aad TT |
10199 | return; |
10200 | ||
10201 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
10202 | NULL, xcalloc, xfree); | |
ec94af83 DE |
10203 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
10204 | NULL, xcalloc, xfree); | |
95554aad TT |
10205 | |
10206 | for (ix = 0; | |
796a7ff8 | 10207 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 10208 | ix, per_cu_iter); |
95554aad | 10209 | ++ix) |
ec94af83 DE |
10210 | { |
10211 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 10212 | all_type_symtabs, per_cu_iter, |
43f3e411 | 10213 | cust); |
ec94af83 | 10214 | } |
95554aad | 10215 | |
ec94af83 | 10216 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
10217 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
10218 | cust->includes | |
ed2dc618 | 10219 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 10220 | struct compunit_symtab *, len + 1); |
95554aad | 10221 | for (ix = 0; |
43f3e411 DE |
10222 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
10223 | compunit_symtab_iter); | |
95554aad | 10224 | ++ix) |
43f3e411 DE |
10225 | cust->includes[ix] = compunit_symtab_iter; |
10226 | cust->includes[len] = NULL; | |
95554aad | 10227 | |
43f3e411 | 10228 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 10229 | htab_delete (all_children); |
ec94af83 | 10230 | htab_delete (all_type_symtabs); |
95554aad TT |
10231 | } |
10232 | } | |
10233 | ||
10234 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
10235 | read. */ | |
10236 | ||
10237 | static void | |
ed2dc618 | 10238 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 10239 | { |
71b73764 | 10240 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
10241 | { |
10242 | if (! iter->is_debug_types) | |
43f3e411 | 10243 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 10244 | } |
95554aad | 10245 | |
c5d0225d | 10246 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
10247 | } |
10248 | ||
9cdd5dbd | 10249 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
10250 | already been loaded into memory. */ |
10251 | ||
10252 | static void | |
95554aad TT |
10253 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
10254 | enum language pretend_language) | |
10b3939b | 10255 | { |
10b3939b | 10256 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
10257 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10258 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 10259 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 10260 | CORE_ADDR lowpc, highpc; |
43f3e411 | 10261 | struct compunit_symtab *cust; |
10b3939b | 10262 | CORE_ADDR baseaddr; |
4359dff1 | 10263 | struct block *static_block; |
3e29f34a | 10264 | CORE_ADDR addr; |
10b3939b DJ |
10265 | |
10266 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
10267 | ||
c89b44cd TT |
10268 | /* Clear the list here in case something was left over. */ |
10269 | cu->method_list.clear (); | |
10b3939b | 10270 | |
95554aad TT |
10271 | cu->language = pretend_language; |
10272 | cu->language_defn = language_def (cu->language); | |
10273 | ||
c906108c | 10274 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 10275 | process_die (cu->dies, cu); |
c906108c | 10276 | |
a766d390 DE |
10277 | /* For now fudge the Go package. */ |
10278 | if (cu->language == language_go) | |
10279 | fixup_go_packaging (cu); | |
10280 | ||
3da10d80 KS |
10281 | /* Now that we have processed all the DIEs in the CU, all the types |
10282 | should be complete, and it should now be safe to compute all of the | |
10283 | physnames. */ | |
10284 | compute_delayed_physnames (cu); | |
3da10d80 | 10285 | |
c9317f21 TT |
10286 | if (cu->language == language_rust) |
10287 | rust_union_quirks (cu); | |
10288 | ||
fae299cd DC |
10289 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
10290 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
10291 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 10292 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 10293 | |
3e29f34a | 10294 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
804d2729 | 10295 | static_block = cu->builder->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
10296 | |
10297 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
10298 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
10299 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
10300 | addrmap to help ensure it has an accurate map of pc values belonging to | |
10301 | this comp unit. */ | |
10302 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
10303 | ||
804d2729 TT |
10304 | cust = cu->builder->end_symtab_from_static_block (static_block, |
10305 | SECT_OFF_TEXT (objfile), | |
10306 | 0); | |
c906108c | 10307 | |
43f3e411 | 10308 | if (cust != NULL) |
c906108c | 10309 | { |
df15bd07 | 10310 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 10311 | |
8be455d7 JK |
10312 | /* Set symtab language to language from DW_AT_language. If the |
10313 | compilation is from a C file generated by language preprocessors, do | |
10314 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 10315 | if (!(cu->language == language_c |
40e3ad0e | 10316 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 10317 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
10318 | |
10319 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
10320 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
10321 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
10322 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
10323 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
10324 | |
10325 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
10326 | needed, it would be wrong due to missing DW_AT_producer there. | |
10327 | ||
10328 | Still one can confuse GDB by using non-standard GCC compilation | |
10329 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
10330 | */ | |
ab260dad | 10331 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 10332 | cust->locations_valid = 1; |
e0d00bc7 JK |
10333 | |
10334 | if (gcc_4_minor >= 5) | |
43f3e411 | 10335 | cust->epilogue_unwind_valid = 1; |
96408a79 | 10336 | |
43f3e411 | 10337 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 10338 | } |
9291a0cd TT |
10339 | |
10340 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10341 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
10342 | else |
10343 | { | |
10344 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10345 | pst->compunit_symtab = cust; |
9291a0cd TT |
10346 | pst->readin = 1; |
10347 | } | |
c906108c | 10348 | |
95554aad | 10349 | /* Push it for inclusion processing later. */ |
c5d0225d | 10350 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
10351 | |
10352 | /* Not needed any more. */ | |
10353 | cu->builder.reset (); | |
f4dc4d17 | 10354 | } |
45cfd468 | 10355 | |
f4dc4d17 DE |
10356 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
10357 | already been loaded into memory. */ | |
10358 | ||
10359 | static void | |
10360 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
10361 | enum language pretend_language) | |
10362 | { | |
10363 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
10364 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10365 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 10366 | struct compunit_symtab *cust; |
0186c6a7 DE |
10367 | struct signatured_type *sig_type; |
10368 | ||
10369 | gdb_assert (per_cu->is_debug_types); | |
10370 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 10371 | |
c89b44cd TT |
10372 | /* Clear the list here in case something was left over. */ |
10373 | cu->method_list.clear (); | |
f4dc4d17 | 10374 | |
f4dc4d17 DE |
10375 | cu->language = pretend_language; |
10376 | cu->language_defn = language_def (cu->language); | |
10377 | ||
10378 | /* The symbol tables are set up in read_type_unit_scope. */ | |
10379 | process_die (cu->dies, cu); | |
10380 | ||
10381 | /* For now fudge the Go package. */ | |
10382 | if (cu->language == language_go) | |
10383 | fixup_go_packaging (cu); | |
10384 | ||
10385 | /* Now that we have processed all the DIEs in the CU, all the types | |
10386 | should be complete, and it should now be safe to compute all of the | |
10387 | physnames. */ | |
10388 | compute_delayed_physnames (cu); | |
f4dc4d17 | 10389 | |
c9317f21 TT |
10390 | if (cu->language == language_rust) |
10391 | rust_union_quirks (cu); | |
10392 | ||
f4dc4d17 DE |
10393 | /* TUs share symbol tables. |
10394 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
10395 | of it with end_expandable_symtab. Otherwise, complete the addition of |
10396 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 10397 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 10398 | { |
804d2729 | 10399 | cust = cu->builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
43f3e411 | 10400 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 10401 | |
43f3e411 | 10402 | if (cust != NULL) |
f4dc4d17 DE |
10403 | { |
10404 | /* Set symtab language to language from DW_AT_language. If the | |
10405 | compilation is from a C file generated by language preprocessors, | |
10406 | do not set the language if it was already deduced by | |
10407 | start_subfile. */ | |
43f3e411 DE |
10408 | if (!(cu->language == language_c |
10409 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
10410 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
10411 | } |
10412 | } | |
10413 | else | |
10414 | { | |
804d2729 | 10415 | cu->builder->augment_type_symtab (); |
43f3e411 | 10416 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
10417 | } |
10418 | ||
10419 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10420 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
10421 | else |
10422 | { | |
10423 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10424 | pst->compunit_symtab = cust; |
f4dc4d17 | 10425 | pst->readin = 1; |
45cfd468 | 10426 | } |
804d2729 TT |
10427 | |
10428 | /* Not needed any more. */ | |
10429 | cu->builder.reset (); | |
c906108c SS |
10430 | } |
10431 | ||
95554aad TT |
10432 | /* Process an imported unit DIE. */ |
10433 | ||
10434 | static void | |
10435 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
10436 | { | |
10437 | struct attribute *attr; | |
10438 | ||
f4dc4d17 DE |
10439 | /* For now we don't handle imported units in type units. */ |
10440 | if (cu->per_cu->is_debug_types) | |
10441 | { | |
10442 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
10443 | " supported in type units [in module %s]"), | |
518817b3 | 10444 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
10445 | } |
10446 | ||
95554aad TT |
10447 | attr = dwarf2_attr (die, DW_AT_import, cu); |
10448 | if (attr != NULL) | |
10449 | { | |
9c541725 PA |
10450 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
10451 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
10452 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 10453 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 10454 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 10455 | |
69d751e3 | 10456 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 10457 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 10458 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 10459 | |
796a7ff8 | 10460 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
10461 | per_cu); |
10462 | } | |
10463 | } | |
10464 | ||
4c8aa72d PA |
10465 | /* RAII object that represents a process_die scope: i.e., |
10466 | starts/finishes processing a DIE. */ | |
10467 | class process_die_scope | |
adde2bff | 10468 | { |
4c8aa72d PA |
10469 | public: |
10470 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
10471 | : m_die (die), m_cu (cu) | |
10472 | { | |
10473 | /* We should only be processing DIEs not already in process. */ | |
10474 | gdb_assert (!m_die->in_process); | |
10475 | m_die->in_process = true; | |
10476 | } | |
8c3cb9fa | 10477 | |
4c8aa72d PA |
10478 | ~process_die_scope () |
10479 | { | |
10480 | m_die->in_process = false; | |
10481 | ||
10482 | /* If we're done processing the DIE for the CU that owns the line | |
10483 | header, we don't need the line header anymore. */ | |
10484 | if (m_cu->line_header_die_owner == m_die) | |
10485 | { | |
10486 | delete m_cu->line_header; | |
10487 | m_cu->line_header = NULL; | |
10488 | m_cu->line_header_die_owner = NULL; | |
10489 | } | |
10490 | } | |
10491 | ||
10492 | private: | |
10493 | die_info *m_die; | |
10494 | dwarf2_cu *m_cu; | |
10495 | }; | |
adde2bff | 10496 | |
c906108c SS |
10497 | /* Process a die and its children. */ |
10498 | ||
10499 | static void | |
e7c27a73 | 10500 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10501 | { |
4c8aa72d | 10502 | process_die_scope scope (die, cu); |
adde2bff | 10503 | |
c906108c SS |
10504 | switch (die->tag) |
10505 | { | |
10506 | case DW_TAG_padding: | |
10507 | break; | |
10508 | case DW_TAG_compile_unit: | |
95554aad | 10509 | case DW_TAG_partial_unit: |
e7c27a73 | 10510 | read_file_scope (die, cu); |
c906108c | 10511 | break; |
348e048f DE |
10512 | case DW_TAG_type_unit: |
10513 | read_type_unit_scope (die, cu); | |
10514 | break; | |
c906108c | 10515 | case DW_TAG_subprogram: |
c906108c | 10516 | case DW_TAG_inlined_subroutine: |
edb3359d | 10517 | read_func_scope (die, cu); |
c906108c SS |
10518 | break; |
10519 | case DW_TAG_lexical_block: | |
14898363 L |
10520 | case DW_TAG_try_block: |
10521 | case DW_TAG_catch_block: | |
e7c27a73 | 10522 | read_lexical_block_scope (die, cu); |
c906108c | 10523 | break; |
216f72a1 | 10524 | case DW_TAG_call_site: |
96408a79 SA |
10525 | case DW_TAG_GNU_call_site: |
10526 | read_call_site_scope (die, cu); | |
10527 | break; | |
c906108c | 10528 | case DW_TAG_class_type: |
680b30c7 | 10529 | case DW_TAG_interface_type: |
c906108c SS |
10530 | case DW_TAG_structure_type: |
10531 | case DW_TAG_union_type: | |
134d01f1 | 10532 | process_structure_scope (die, cu); |
c906108c SS |
10533 | break; |
10534 | case DW_TAG_enumeration_type: | |
134d01f1 | 10535 | process_enumeration_scope (die, cu); |
c906108c | 10536 | break; |
134d01f1 | 10537 | |
f792889a DJ |
10538 | /* These dies have a type, but processing them does not create |
10539 | a symbol or recurse to process the children. Therefore we can | |
10540 | read them on-demand through read_type_die. */ | |
c906108c | 10541 | case DW_TAG_subroutine_type: |
72019c9c | 10542 | case DW_TAG_set_type: |
c906108c | 10543 | case DW_TAG_array_type: |
c906108c | 10544 | case DW_TAG_pointer_type: |
c906108c | 10545 | case DW_TAG_ptr_to_member_type: |
c906108c | 10546 | case DW_TAG_reference_type: |
4297a3f0 | 10547 | case DW_TAG_rvalue_reference_type: |
c906108c | 10548 | case DW_TAG_string_type: |
c906108c | 10549 | break; |
134d01f1 | 10550 | |
c906108c | 10551 | case DW_TAG_base_type: |
a02abb62 | 10552 | case DW_TAG_subrange_type: |
cb249c71 | 10553 | case DW_TAG_typedef: |
134d01f1 DJ |
10554 | /* Add a typedef symbol for the type definition, if it has a |
10555 | DW_AT_name. */ | |
f792889a | 10556 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 10557 | break; |
c906108c | 10558 | case DW_TAG_common_block: |
e7c27a73 | 10559 | read_common_block (die, cu); |
c906108c SS |
10560 | break; |
10561 | case DW_TAG_common_inclusion: | |
10562 | break; | |
d9fa45fe | 10563 | case DW_TAG_namespace: |
4d4ec4e5 | 10564 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 10565 | read_namespace (die, cu); |
d9fa45fe | 10566 | break; |
5d7cb8df | 10567 | case DW_TAG_module: |
4d4ec4e5 | 10568 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
10569 | read_module (die, cu); |
10570 | break; | |
d9fa45fe | 10571 | case DW_TAG_imported_declaration: |
74921315 KS |
10572 | cu->processing_has_namespace_info = 1; |
10573 | if (read_namespace_alias (die, cu)) | |
10574 | break; | |
86a73007 TT |
10575 | /* The declaration is not a global namespace alias. */ |
10576 | /* Fall through. */ | |
d9fa45fe | 10577 | case DW_TAG_imported_module: |
4d4ec4e5 | 10578 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
10579 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
10580 | || cu->language != language_fortran)) | |
b98664d3 | 10581 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
10582 | dwarf_tag_name (die->tag)); |
10583 | read_import_statement (die, cu); | |
d9fa45fe | 10584 | break; |
95554aad TT |
10585 | |
10586 | case DW_TAG_imported_unit: | |
10587 | process_imported_unit_die (die, cu); | |
10588 | break; | |
10589 | ||
71a3c369 TT |
10590 | case DW_TAG_variable: |
10591 | read_variable (die, cu); | |
10592 | break; | |
10593 | ||
c906108c | 10594 | default: |
e7c27a73 | 10595 | new_symbol (die, NULL, cu); |
c906108c SS |
10596 | break; |
10597 | } | |
10598 | } | |
ca69b9e6 DE |
10599 | \f |
10600 | /* DWARF name computation. */ | |
c906108c | 10601 | |
94af9270 KS |
10602 | /* A helper function for dwarf2_compute_name which determines whether DIE |
10603 | needs to have the name of the scope prepended to the name listed in the | |
10604 | die. */ | |
10605 | ||
10606 | static int | |
10607 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10608 | { | |
1c809c68 TT |
10609 | struct attribute *attr; |
10610 | ||
94af9270 KS |
10611 | switch (die->tag) |
10612 | { | |
10613 | case DW_TAG_namespace: | |
10614 | case DW_TAG_typedef: | |
10615 | case DW_TAG_class_type: | |
10616 | case DW_TAG_interface_type: | |
10617 | case DW_TAG_structure_type: | |
10618 | case DW_TAG_union_type: | |
10619 | case DW_TAG_enumeration_type: | |
10620 | case DW_TAG_enumerator: | |
10621 | case DW_TAG_subprogram: | |
08a76f8a | 10622 | case DW_TAG_inlined_subroutine: |
94af9270 | 10623 | case DW_TAG_member: |
74921315 | 10624 | case DW_TAG_imported_declaration: |
94af9270 KS |
10625 | return 1; |
10626 | ||
10627 | case DW_TAG_variable: | |
c2b0a229 | 10628 | case DW_TAG_constant: |
94af9270 KS |
10629 | /* We only need to prefix "globally" visible variables. These include |
10630 | any variable marked with DW_AT_external or any variable that | |
10631 | lives in a namespace. [Variables in anonymous namespaces | |
10632 | require prefixing, but they are not DW_AT_external.] */ | |
10633 | ||
10634 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10635 | { | |
10636 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10637 | |
94af9270 KS |
10638 | return die_needs_namespace (die_specification (die, &spec_cu), |
10639 | spec_cu); | |
10640 | } | |
10641 | ||
1c809c68 | 10642 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10643 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10644 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10645 | return 0; |
10646 | /* A variable in a lexical block of some kind does not need a | |
10647 | namespace, even though in C++ such variables may be external | |
10648 | and have a mangled name. */ | |
10649 | if (die->parent->tag == DW_TAG_lexical_block | |
10650 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10651 | || die->parent->tag == DW_TAG_catch_block |
10652 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10653 | return 0; |
10654 | return 1; | |
94af9270 KS |
10655 | |
10656 | default: | |
10657 | return 0; | |
10658 | } | |
10659 | } | |
10660 | ||
73b9be8b KS |
10661 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10662 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10663 | defined for the given DIE. */ | |
10664 | ||
10665 | static struct attribute * | |
10666 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10667 | { | |
10668 | struct attribute *attr; | |
10669 | ||
10670 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10671 | if (attr == NULL) | |
10672 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10673 | ||
10674 | return attr; | |
10675 | } | |
10676 | ||
10677 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10678 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10679 | defined for the given DIE. */ | |
10680 | ||
10681 | static const char * | |
10682 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10683 | { | |
10684 | const char *linkage_name; | |
10685 | ||
10686 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10687 | if (linkage_name == NULL) | |
10688 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10689 | ||
10690 | return linkage_name; | |
10691 | } | |
10692 | ||
94af9270 | 10693 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10694 | compute the physname for the object, which include a method's: |
9c37b5ae | 10695 | - formal parameters (C++), |
a766d390 | 10696 | - receiver type (Go), |
a766d390 DE |
10697 | |
10698 | The term "physname" is a bit confusing. | |
10699 | For C++, for example, it is the demangled name. | |
10700 | For Go, for example, it's the mangled name. | |
94af9270 | 10701 | |
af6b7be1 JB |
10702 | For Ada, return the DIE's linkage name rather than the fully qualified |
10703 | name. PHYSNAME is ignored.. | |
10704 | ||
94af9270 KS |
10705 | The result is allocated on the objfile_obstack and canonicalized. */ |
10706 | ||
10707 | static const char * | |
15d034d0 TT |
10708 | dwarf2_compute_name (const char *name, |
10709 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10710 | int physname) |
10711 | { | |
518817b3 | 10712 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10713 | |
94af9270 KS |
10714 | if (name == NULL) |
10715 | name = dwarf2_name (die, cu); | |
10716 | ||
2ee7123e DE |
10717 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10718 | but otherwise compute it by typename_concat inside GDB. | |
10719 | FIXME: Actually this is not really true, or at least not always true. | |
10720 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
5e2db402 | 10721 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10722 | will set the demangled name to the result of dwarf2_full_name, and it is |
10723 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10724 | if (cu->language == language_ada |
10725 | || (cu->language == language_fortran && physname)) | |
10726 | { | |
10727 | /* For Ada unit, we prefer the linkage name over the name, as | |
10728 | the former contains the exported name, which the user expects | |
10729 | to be able to reference. Ideally, we want the user to be able | |
10730 | to reference this entity using either natural or linkage name, | |
10731 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10732 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10733 | |
2ee7123e DE |
10734 | if (linkage_name != NULL) |
10735 | return linkage_name; | |
f55ee35c JK |
10736 | } |
10737 | ||
94af9270 KS |
10738 | /* These are the only languages we know how to qualify names in. */ |
10739 | if (name != NULL | |
9c37b5ae | 10740 | && (cu->language == language_cplus |
c44af4eb TT |
10741 | || cu->language == language_fortran || cu->language == language_d |
10742 | || cu->language == language_rust)) | |
94af9270 KS |
10743 | { |
10744 | if (die_needs_namespace (die, cu)) | |
10745 | { | |
0d5cff50 | 10746 | const char *prefix; |
34a68019 | 10747 | const char *canonical_name = NULL; |
94af9270 | 10748 | |
d7e74731 PA |
10749 | string_file buf; |
10750 | ||
94af9270 | 10751 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10752 | if (*prefix != '\0') |
10753 | { | |
f55ee35c JK |
10754 | char *prefixed_name = typename_concat (NULL, prefix, name, |
10755 | physname, cu); | |
9a619af0 | 10756 | |
d7e74731 | 10757 | buf.puts (prefixed_name); |
94af9270 KS |
10758 | xfree (prefixed_name); |
10759 | } | |
10760 | else | |
d7e74731 | 10761 | buf.puts (name); |
94af9270 | 10762 | |
98bfdba5 PA |
10763 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10764 | as children with DW_TAG_template_type_param or | |
10765 | DW_TAG_value_type_param. If the latter, add them to the name | |
10766 | here. If the name already has template parameters, then | |
10767 | skip this step; some versions of GCC emit both, and | |
10768 | it is more efficient to use the pre-computed name. | |
10769 | ||
10770 | Something to keep in mind about this process: it is very | |
10771 | unlikely, or in some cases downright impossible, to produce | |
10772 | something that will match the mangled name of a function. | |
10773 | If the definition of the function has the same debug info, | |
10774 | we should be able to match up with it anyway. But fallbacks | |
10775 | using the minimal symbol, for instance to find a method | |
10776 | implemented in a stripped copy of libstdc++, will not work. | |
10777 | If we do not have debug info for the definition, we will have to | |
10778 | match them up some other way. | |
10779 | ||
10780 | When we do name matching there is a related problem with function | |
10781 | templates; two instantiated function templates are allowed to | |
10782 | differ only by their return types, which we do not add here. */ | |
10783 | ||
10784 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10785 | { | |
10786 | struct attribute *attr; | |
10787 | struct die_info *child; | |
10788 | int first = 1; | |
10789 | ||
10790 | die->building_fullname = 1; | |
10791 | ||
10792 | for (child = die->child; child != NULL; child = child->sibling) | |
10793 | { | |
10794 | struct type *type; | |
12df843f | 10795 | LONGEST value; |
d521ce57 | 10796 | const gdb_byte *bytes; |
98bfdba5 PA |
10797 | struct dwarf2_locexpr_baton *baton; |
10798 | struct value *v; | |
10799 | ||
10800 | if (child->tag != DW_TAG_template_type_param | |
10801 | && child->tag != DW_TAG_template_value_param) | |
10802 | continue; | |
10803 | ||
10804 | if (first) | |
10805 | { | |
d7e74731 | 10806 | buf.puts ("<"); |
98bfdba5 PA |
10807 | first = 0; |
10808 | } | |
10809 | else | |
d7e74731 | 10810 | buf.puts (", "); |
98bfdba5 PA |
10811 | |
10812 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10813 | if (attr == NULL) | |
10814 | { | |
b98664d3 | 10815 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10816 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10817 | continue; |
10818 | } | |
10819 | type = die_type (child, cu); | |
10820 | ||
10821 | if (child->tag == DW_TAG_template_type_param) | |
10822 | { | |
c1ec8cea TT |
10823 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10824 | &type_print_raw_options); | |
98bfdba5 PA |
10825 | continue; |
10826 | } | |
10827 | ||
10828 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10829 | if (attr == NULL) | |
10830 | { | |
b98664d3 | 10831 | complaint (_("template parameter missing " |
3e43a32a | 10832 | "DW_AT_const_value")); |
d7e74731 | 10833 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10834 | continue; |
10835 | } | |
10836 | ||
10837 | dwarf2_const_value_attr (attr, type, name, | |
10838 | &cu->comp_unit_obstack, cu, | |
10839 | &value, &bytes, &baton); | |
10840 | ||
10841 | if (TYPE_NOSIGN (type)) | |
10842 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10843 | changed, this can use value_print instead. */ | |
d7e74731 | 10844 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10845 | else |
10846 | { | |
10847 | struct value_print_options opts; | |
10848 | ||
10849 | if (baton != NULL) | |
10850 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10851 | baton->data, | |
10852 | baton->size, | |
10853 | baton->per_cu); | |
10854 | else if (bytes != NULL) | |
10855 | { | |
10856 | v = allocate_value (type); | |
10857 | memcpy (value_contents_writeable (v), bytes, | |
10858 | TYPE_LENGTH (type)); | |
10859 | } | |
10860 | else | |
10861 | v = value_from_longest (type, value); | |
10862 | ||
3e43a32a MS |
10863 | /* Specify decimal so that we do not depend on |
10864 | the radix. */ | |
98bfdba5 PA |
10865 | get_formatted_print_options (&opts, 'd'); |
10866 | opts.raw = 1; | |
d7e74731 | 10867 | value_print (v, &buf, &opts); |
98bfdba5 | 10868 | release_value (v); |
98bfdba5 PA |
10869 | } |
10870 | } | |
10871 | ||
10872 | die->building_fullname = 0; | |
10873 | ||
10874 | if (!first) | |
10875 | { | |
10876 | /* Close the argument list, with a space if necessary | |
10877 | (nested templates). */ | |
d7e74731 PA |
10878 | if (!buf.empty () && buf.string ().back () == '>') |
10879 | buf.puts (" >"); | |
98bfdba5 | 10880 | else |
d7e74731 | 10881 | buf.puts (">"); |
98bfdba5 PA |
10882 | } |
10883 | } | |
10884 | ||
9c37b5ae | 10885 | /* For C++ methods, append formal parameter type |
94af9270 | 10886 | information, if PHYSNAME. */ |
6e70227d | 10887 | |
94af9270 | 10888 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10889 | && cu->language == language_cplus) |
94af9270 KS |
10890 | { |
10891 | struct type *type = read_type_die (die, cu); | |
10892 | ||
d7e74731 | 10893 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10894 | &type_print_raw_options); |
94af9270 | 10895 | |
9c37b5ae | 10896 | if (cu->language == language_cplus) |
94af9270 | 10897 | { |
60430eff DJ |
10898 | /* Assume that an artificial first parameter is |
10899 | "this", but do not crash if it is not. RealView | |
10900 | marks unnamed (and thus unused) parameters as | |
10901 | artificial; there is no way to differentiate | |
10902 | the two cases. */ | |
94af9270 KS |
10903 | if (TYPE_NFIELDS (type) > 0 |
10904 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 10905 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
10906 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10907 | 0)))) | |
d7e74731 | 10908 | buf.puts (" const"); |
94af9270 KS |
10909 | } |
10910 | } | |
10911 | ||
d7e74731 | 10912 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10913 | |
10914 | if (cu->language == language_cplus) | |
34a68019 | 10915 | canonical_name |
322a8516 | 10916 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
10917 | &objfile->per_bfd->storage_obstack); |
10918 | ||
10919 | /* If we only computed INTERMEDIATE_NAME, or if | |
10920 | INTERMEDIATE_NAME is already canonical, then we need to | |
10921 | copy it to the appropriate obstack. */ | |
322a8516 | 10922 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
10923 | name = ((const char *) |
10924 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
10925 | intermediate_name.c_str (), |
10926 | intermediate_name.length ())); | |
34a68019 TT |
10927 | else |
10928 | name = canonical_name; | |
94af9270 KS |
10929 | } |
10930 | } | |
10931 | ||
10932 | return name; | |
10933 | } | |
10934 | ||
0114d602 DJ |
10935 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10936 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10937 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10938 | not have a name. NAME may either be from a previous call to |
10939 | dwarf2_name or NULL. | |
10940 | ||
9c37b5ae | 10941 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10942 | |
10943 | static const char * | |
15d034d0 | 10944 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10945 | { |
94af9270 KS |
10946 | return dwarf2_compute_name (name, die, cu, 0); |
10947 | } | |
0114d602 | 10948 | |
94af9270 KS |
10949 | /* Construct a physname for the given DIE in CU. NAME may either be |
10950 | from a previous call to dwarf2_name or NULL. The result will be | |
10951 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10952 | name. | |
0114d602 | 10953 | |
9c37b5ae | 10954 | The output string will be canonicalized (if C++). */ |
0114d602 | 10955 | |
94af9270 | 10956 | static const char * |
15d034d0 | 10957 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10958 | { |
518817b3 | 10959 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 10960 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10961 | int need_copy = 1; |
10962 | ||
10963 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10964 | on its own. */ | |
10965 | if (!die_needs_namespace (die, cu)) | |
10966 | return dwarf2_compute_name (name, die, cu, 1); | |
10967 | ||
73b9be8b | 10968 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 10969 | |
e98c9e7c TT |
10970 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
10971 | See https://github.com/rust-lang/rust/issues/32925. */ | |
10972 | if (cu->language == language_rust && mangled != NULL | |
10973 | && strchr (mangled, '{') != NULL) | |
10974 | mangled = NULL; | |
10975 | ||
900e11f9 JK |
10976 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
10977 | has computed. */ | |
791afaa2 | 10978 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10979 | if (mangled != NULL) |
900e11f9 | 10980 | { |
900e11f9 | 10981 | |
59cc4834 JB |
10982 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
10983 | { | |
10984 | /* Do nothing (do not demangle the symbol name). */ | |
10985 | } | |
10986 | else if (cu->language == language_go) | |
a766d390 | 10987 | { |
5e2db402 TT |
10988 | /* This is a lie, but we already lie to the caller new_symbol. |
10989 | new_symbol assumes we return the mangled name. | |
a766d390 | 10990 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
10991 | } |
10992 | else | |
10993 | { | |
0eb876f5 JB |
10994 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10995 | their return type. It is easier for GDB users to search | |
10996 | for such functions as `name(params)' than `long name(params)'. | |
10997 | In such case the minimal symbol names do not match the full | |
10998 | symbol names but for template functions there is never a need | |
10999 | to look up their definition from their declaration so | |
11000 | the only disadvantage remains the minimal symbol variant | |
11001 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
11002 | demangled.reset (gdb_demangle (mangled, |
11003 | (DMGL_PARAMS | DMGL_ANSI | |
11004 | | DMGL_RET_DROP))); | |
a766d390 | 11005 | } |
900e11f9 | 11006 | if (demangled) |
791afaa2 | 11007 | canon = demangled.get (); |
900e11f9 JK |
11008 | else |
11009 | { | |
11010 | canon = mangled; | |
11011 | need_copy = 0; | |
11012 | } | |
11013 | } | |
11014 | ||
11015 | if (canon == NULL || check_physname) | |
11016 | { | |
11017 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
11018 | ||
11019 | if (canon != NULL && strcmp (physname, canon) != 0) | |
11020 | { | |
11021 | /* It may not mean a bug in GDB. The compiler could also | |
11022 | compute DW_AT_linkage_name incorrectly. But in such case | |
11023 | GDB would need to be bug-to-bug compatible. */ | |
11024 | ||
b98664d3 | 11025 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
11026 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
11027 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 11028 | objfile_name (objfile)); |
900e11f9 JK |
11029 | |
11030 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
11031 | is available here - over computed PHYSNAME. It is safer | |
11032 | against both buggy GDB and buggy compilers. */ | |
11033 | ||
11034 | retval = canon; | |
11035 | } | |
11036 | else | |
11037 | { | |
11038 | retval = physname; | |
11039 | need_copy = 0; | |
11040 | } | |
11041 | } | |
11042 | else | |
11043 | retval = canon; | |
11044 | ||
11045 | if (need_copy) | |
224c3ddb SM |
11046 | retval = ((const char *) |
11047 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
11048 | retval, strlen (retval))); | |
900e11f9 | 11049 | |
900e11f9 | 11050 | return retval; |
0114d602 DJ |
11051 | } |
11052 | ||
74921315 KS |
11053 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
11054 | a new symbol for it. | |
11055 | ||
11056 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
11057 | ||
11058 | static int | |
11059 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
11060 | { | |
11061 | struct attribute *attr; | |
11062 | ||
11063 | /* If the die does not have a name, this is not a namespace | |
11064 | alias. */ | |
11065 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
11066 | if (attr != NULL) | |
11067 | { | |
11068 | int num; | |
11069 | struct die_info *d = die; | |
11070 | struct dwarf2_cu *imported_cu = cu; | |
11071 | ||
11072 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
11073 | keep inspecting DIEs until we hit the underlying import. */ | |
11074 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
11075 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
11076 | { | |
11077 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
11078 | if (attr == NULL) | |
11079 | break; | |
11080 | ||
11081 | d = follow_die_ref (d, attr, &imported_cu); | |
11082 | if (d->tag != DW_TAG_imported_declaration) | |
11083 | break; | |
11084 | } | |
11085 | ||
11086 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
11087 | { | |
b98664d3 | 11088 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 11089 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
11090 | return 0; |
11091 | } | |
11092 | ||
11093 | if (attr != NULL) | |
11094 | { | |
11095 | struct type *type; | |
9c541725 | 11096 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 11097 | |
9c541725 | 11098 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
11099 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
11100 | { | |
11101 | /* This declaration is a global namespace alias. Add | |
11102 | a symbol for it whose type is the aliased namespace. */ | |
11103 | new_symbol (die, type, cu); | |
11104 | return 1; | |
11105 | } | |
11106 | } | |
11107 | } | |
11108 | ||
11109 | return 0; | |
11110 | } | |
11111 | ||
22cee43f | 11112 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 11113 | current context for CU. |
22cee43f PMR |
11114 | |
11115 | For Ada, imported declarations can materialize renamings, which *may* be | |
11116 | global. However it is impossible (for now?) in DWARF to distinguish | |
11117 | "external" imported declarations and "static" ones. As all imported | |
11118 | declarations seem to be static in all other languages, make them all CU-wide | |
11119 | global only in Ada. */ | |
11120 | ||
11121 | static struct using_direct ** | |
804d2729 | 11122 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 11123 | { |
804d2729 TT |
11124 | if (cu->language == language_ada && cu->builder->outermost_context_p ()) |
11125 | return cu->builder->get_global_using_directives (); | |
22cee43f | 11126 | else |
804d2729 | 11127 | return cu->builder->get_local_using_directives (); |
22cee43f PMR |
11128 | } |
11129 | ||
27aa8d6a SW |
11130 | /* Read the import statement specified by the given die and record it. */ |
11131 | ||
11132 | static void | |
11133 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
11134 | { | |
518817b3 | 11135 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 11136 | struct attribute *import_attr; |
32019081 | 11137 | struct die_info *imported_die, *child_die; |
de4affc9 | 11138 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 11139 | const char *imported_name; |
794684b6 | 11140 | const char *imported_name_prefix; |
13387711 SW |
11141 | const char *canonical_name; |
11142 | const char *import_alias; | |
11143 | const char *imported_declaration = NULL; | |
794684b6 | 11144 | const char *import_prefix; |
eb1e02fd | 11145 | std::vector<const char *> excludes; |
13387711 | 11146 | |
27aa8d6a SW |
11147 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
11148 | if (import_attr == NULL) | |
11149 | { | |
b98664d3 | 11150 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
11151 | dwarf_tag_name (die->tag)); |
11152 | return; | |
11153 | } | |
11154 | ||
de4affc9 CC |
11155 | imported_cu = cu; |
11156 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
11157 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
11158 | if (imported_name == NULL) |
11159 | { | |
11160 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
11161 | ||
11162 | The import in the following code: | |
11163 | namespace A | |
11164 | { | |
11165 | typedef int B; | |
11166 | } | |
11167 | ||
11168 | int main () | |
11169 | { | |
11170 | using A::B; | |
11171 | B b; | |
11172 | return b; | |
11173 | } | |
11174 | ||
11175 | ... | |
11176 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
11177 | <52> DW_AT_decl_file : 1 | |
11178 | <53> DW_AT_decl_line : 6 | |
11179 | <54> DW_AT_import : <0x75> | |
11180 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
11181 | <59> DW_AT_name : B | |
11182 | <5b> DW_AT_decl_file : 1 | |
11183 | <5c> DW_AT_decl_line : 2 | |
11184 | <5d> DW_AT_type : <0x6e> | |
11185 | ... | |
11186 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
11187 | <76> DW_AT_byte_size : 4 | |
11188 | <77> DW_AT_encoding : 5 (signed) | |
11189 | ||
11190 | imports the wrong die ( 0x75 instead of 0x58 ). | |
11191 | This case will be ignored until the gcc bug is fixed. */ | |
11192 | return; | |
11193 | } | |
11194 | ||
82856980 SW |
11195 | /* Figure out the local name after import. */ |
11196 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 11197 | |
794684b6 SW |
11198 | /* Figure out where the statement is being imported to. */ |
11199 | import_prefix = determine_prefix (die, cu); | |
11200 | ||
11201 | /* Figure out what the scope of the imported die is and prepend it | |
11202 | to the name of the imported die. */ | |
de4affc9 | 11203 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 11204 | |
f55ee35c JK |
11205 | if (imported_die->tag != DW_TAG_namespace |
11206 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 11207 | { |
13387711 SW |
11208 | imported_declaration = imported_name; |
11209 | canonical_name = imported_name_prefix; | |
794684b6 | 11210 | } |
13387711 | 11211 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 11212 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
11213 | imported_name_prefix, |
11214 | (cu->language == language_d ? "." : "::"), | |
11215 | imported_name, (char *) NULL); | |
13387711 SW |
11216 | else |
11217 | canonical_name = imported_name; | |
794684b6 | 11218 | |
32019081 JK |
11219 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
11220 | for (child_die = die->child; child_die && child_die->tag; | |
11221 | child_die = sibling_die (child_die)) | |
11222 | { | |
11223 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
11224 | represented by an imported module entry with an import attribute | |
11225 | referring to the module and owned entries corresponding to those | |
11226 | entities that are renamed as part of being imported. */ | |
11227 | ||
11228 | if (child_die->tag != DW_TAG_imported_declaration) | |
11229 | { | |
b98664d3 | 11230 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
11231 | "- DIE at %s [in module %s]"), |
11232 | sect_offset_str (child_die->sect_off), | |
11233 | objfile_name (objfile)); | |
32019081 JK |
11234 | continue; |
11235 | } | |
11236 | ||
11237 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
11238 | if (import_attr == NULL) | |
11239 | { | |
b98664d3 | 11240 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
11241 | dwarf_tag_name (child_die->tag)); |
11242 | continue; | |
11243 | } | |
11244 | ||
11245 | imported_cu = cu; | |
11246 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
11247 | &imported_cu); | |
11248 | imported_name = dwarf2_name (imported_die, imported_cu); | |
11249 | if (imported_name == NULL) | |
11250 | { | |
b98664d3 | 11251 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
11252 | "imported name - DIE at %s [in module %s]"), |
11253 | sect_offset_str (child_die->sect_off), | |
11254 | objfile_name (objfile)); | |
32019081 JK |
11255 | continue; |
11256 | } | |
11257 | ||
eb1e02fd | 11258 | excludes.push_back (imported_name); |
32019081 JK |
11259 | |
11260 | process_die (child_die, cu); | |
11261 | } | |
11262 | ||
804d2729 | 11263 | add_using_directive (using_directives (cu), |
22cee43f PMR |
11264 | import_prefix, |
11265 | canonical_name, | |
11266 | import_alias, | |
11267 | imported_declaration, | |
11268 | excludes, | |
11269 | 0, | |
11270 | &objfile->objfile_obstack); | |
27aa8d6a SW |
11271 | } |
11272 | ||
5230b05a WT |
11273 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
11274 | types, but gives them a size of zero. Starting with version 14, | |
11275 | ICC is compatible with GCC. */ | |
11276 | ||
11277 | static int | |
11278 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
11279 | { | |
11280 | if (!cu->checked_producer) | |
11281 | check_producer (cu); | |
11282 | ||
11283 | return cu->producer_is_icc_lt_14; | |
11284 | } | |
11285 | ||
1b80a9fa JK |
11286 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
11287 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
11288 | this, it was first present in GCC release 4.3.0. */ | |
11289 | ||
11290 | static int | |
11291 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
11292 | { | |
11293 | if (!cu->checked_producer) | |
11294 | check_producer (cu); | |
11295 | ||
11296 | return cu->producer_is_gcc_lt_4_3; | |
11297 | } | |
11298 | ||
d721ba37 PA |
11299 | static file_and_directory |
11300 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 11301 | { |
d721ba37 PA |
11302 | file_and_directory res; |
11303 | ||
9291a0cd TT |
11304 | /* Find the filename. Do not use dwarf2_name here, since the filename |
11305 | is not a source language identifier. */ | |
d721ba37 PA |
11306 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
11307 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 11308 | |
d721ba37 PA |
11309 | if (res.comp_dir == NULL |
11310 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
11311 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 11312 | { |
d721ba37 PA |
11313 | res.comp_dir_storage = ldirname (res.name); |
11314 | if (!res.comp_dir_storage.empty ()) | |
11315 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 11316 | } |
d721ba37 | 11317 | if (res.comp_dir != NULL) |
9291a0cd TT |
11318 | { |
11319 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
11320 | directory, get rid of it. */ | |
d721ba37 | 11321 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 11322 | |
d721ba37 PA |
11323 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
11324 | res.comp_dir = cp + 1; | |
9291a0cd TT |
11325 | } |
11326 | ||
d721ba37 PA |
11327 | if (res.name == NULL) |
11328 | res.name = "<unknown>"; | |
11329 | ||
11330 | return res; | |
9291a0cd TT |
11331 | } |
11332 | ||
f4dc4d17 DE |
11333 | /* Handle DW_AT_stmt_list for a compilation unit. |
11334 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
11335 | COMP_DIR is the compilation directory. LOWPC is passed to |
11336 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
11337 | |
11338 | static void | |
11339 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 11340 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 11341 | { |
518817b3 SM |
11342 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11343 | = cu->per_cu->dwarf2_per_objfile; | |
527f3840 | 11344 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 11345 | struct attribute *attr; |
527f3840 JK |
11346 | struct line_header line_header_local; |
11347 | hashval_t line_header_local_hash; | |
527f3840 JK |
11348 | void **slot; |
11349 | int decode_mapping; | |
2ab95328 | 11350 | |
f4dc4d17 DE |
11351 | gdb_assert (! cu->per_cu->is_debug_types); |
11352 | ||
2ab95328 | 11353 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
11354 | if (attr == NULL) |
11355 | return; | |
11356 | ||
9c541725 | 11357 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
11358 | |
11359 | /* The line header hash table is only created if needed (it exists to | |
11360 | prevent redundant reading of the line table for partial_units). | |
11361 | If we're given a partial_unit, we'll need it. If we're given a | |
11362 | compile_unit, then use the line header hash table if it's already | |
11363 | created, but don't create one just yet. */ | |
11364 | ||
11365 | if (dwarf2_per_objfile->line_header_hash == NULL | |
11366 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 11367 | { |
527f3840 JK |
11368 | dwarf2_per_objfile->line_header_hash |
11369 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
11370 | line_header_eq_voidp, | |
11371 | free_line_header_voidp, | |
11372 | &objfile->objfile_obstack, | |
11373 | hashtab_obstack_allocate, | |
11374 | dummy_obstack_deallocate); | |
11375 | } | |
2ab95328 | 11376 | |
9c541725 | 11377 | line_header_local.sect_off = line_offset; |
527f3840 JK |
11378 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
11379 | line_header_local_hash = line_header_hash (&line_header_local); | |
11380 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
11381 | { | |
11382 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11383 | &line_header_local, | |
11384 | line_header_local_hash, NO_INSERT); | |
11385 | ||
11386 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
11387 | is not present in *SLOT (since if there is something in *SLOT then | |
11388 | it will be for a partial_unit). */ | |
11389 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 11390 | { |
527f3840 | 11391 | gdb_assert (*slot != NULL); |
9a3c8263 | 11392 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 11393 | return; |
dee91e82 | 11394 | } |
2ab95328 | 11395 | } |
527f3840 JK |
11396 | |
11397 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
11398 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
11399 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
11400 | if (lh == NULL) | |
527f3840 | 11401 | return; |
4c8aa72d PA |
11402 | |
11403 | cu->line_header = lh.release (); | |
11404 | cu->line_header_die_owner = die; | |
527f3840 JK |
11405 | |
11406 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
11407 | slot = NULL; | |
11408 | else | |
11409 | { | |
11410 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11411 | &line_header_local, | |
11412 | line_header_local_hash, INSERT); | |
11413 | gdb_assert (slot != NULL); | |
11414 | } | |
11415 | if (slot != NULL && *slot == NULL) | |
11416 | { | |
11417 | /* This newly decoded line number information unit will be owned | |
11418 | by line_header_hash hash table. */ | |
11419 | *slot = cu->line_header; | |
4c8aa72d | 11420 | cu->line_header_die_owner = NULL; |
527f3840 JK |
11421 | } |
11422 | else | |
11423 | { | |
11424 | /* We cannot free any current entry in (*slot) as that struct line_header | |
11425 | may be already used by multiple CUs. Create only temporary decoded | |
11426 | line_header for this CU - it may happen at most once for each line | |
11427 | number information unit. And if we're not using line_header_hash | |
11428 | then this is what we want as well. */ | |
11429 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
11430 | } |
11431 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
11432 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
11433 | decode_mapping); | |
fff8551c | 11434 | |
2ab95328 TT |
11435 | } |
11436 | ||
95554aad | 11437 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 11438 | |
c906108c | 11439 | static void |
e7c27a73 | 11440 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11441 | { |
518817b3 SM |
11442 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11443 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 11444 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 11445 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 11446 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
11447 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
11448 | struct attribute *attr; | |
c906108c | 11449 | struct die_info *child_die; |
e142c38c | 11450 | CORE_ADDR baseaddr; |
6e70227d | 11451 | |
380618d6 | 11452 | prepare_one_comp_unit (cu, die, cu->language); |
e142c38c | 11453 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 11454 | |
fae299cd | 11455 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
11456 | |
11457 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
11458 | from finish_block. */ | |
2acceee2 | 11459 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 11460 | lowpc = highpc; |
3e29f34a | 11461 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 11462 | |
d721ba37 | 11463 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 11464 | |
f4b8a18d KW |
11465 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
11466 | standardised yet. As a workaround for the language detection we fall | |
11467 | back to the DW_AT_producer string. */ | |
11468 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
11469 | cu->language = language_opencl; | |
11470 | ||
3019eac3 DE |
11471 | /* Similar hack for Go. */ |
11472 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
11473 | set_cu_language (DW_LANG_Go, cu); | |
11474 | ||
d721ba37 | 11475 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
11476 | |
11477 | /* Decode line number information if present. We do this before | |
11478 | processing child DIEs, so that the line header table is available | |
11479 | for DW_AT_decl_file. */ | |
d721ba37 | 11480 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
11481 | |
11482 | /* Process all dies in compilation unit. */ | |
11483 | if (die->child != NULL) | |
11484 | { | |
11485 | child_die = die->child; | |
11486 | while (child_die && child_die->tag) | |
11487 | { | |
11488 | process_die (child_die, cu); | |
11489 | child_die = sibling_die (child_die); | |
11490 | } | |
11491 | } | |
11492 | ||
11493 | /* Decode macro information, if present. Dwarf 2 macro information | |
11494 | refers to information in the line number info statement program | |
11495 | header, so we can only read it if we've read the header | |
11496 | successfully. */ | |
0af92d60 JK |
11497 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
11498 | if (attr == NULL) | |
11499 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
11500 | if (attr && cu->line_header) |
11501 | { | |
11502 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 11503 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 11504 | |
43f3e411 | 11505 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
11506 | } |
11507 | else | |
11508 | { | |
11509 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
11510 | if (attr && cu->line_header) | |
11511 | { | |
11512 | unsigned int macro_offset = DW_UNSND (attr); | |
11513 | ||
43f3e411 | 11514 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
11515 | } |
11516 | } | |
3019eac3 DE |
11517 | } |
11518 | ||
f4dc4d17 DE |
11519 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
11520 | Create the set of symtabs used by this TU, or if this TU is sharing | |
11521 | symtabs with another TU and the symtabs have already been created | |
11522 | then restore those symtabs in the line header. | |
11523 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
11524 | |
11525 | static void | |
f4dc4d17 | 11526 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 11527 | { |
f4dc4d17 DE |
11528 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
11529 | struct type_unit_group *tu_group; | |
11530 | int first_time; | |
3019eac3 | 11531 | struct attribute *attr; |
9c541725 | 11532 | unsigned int i; |
0186c6a7 | 11533 | struct signatured_type *sig_type; |
3019eac3 | 11534 | |
f4dc4d17 | 11535 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 11536 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 11537 | |
f4dc4d17 | 11538 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 11539 | |
f4dc4d17 | 11540 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 11541 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
11542 | if (sig_type->type_unit_group == NULL) |
11543 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
11544 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
11545 | |
11546 | /* If we've already processed this stmt_list there's no real need to | |
11547 | do it again, we could fake it and just recreate the part we need | |
11548 | (file name,index -> symtab mapping). If data shows this optimization | |
11549 | is useful we can do it then. */ | |
43f3e411 | 11550 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
11551 | |
11552 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
11553 | debug info. */ | |
fff8551c | 11554 | line_header_up lh; |
f4dc4d17 | 11555 | if (attr != NULL) |
3019eac3 | 11556 | { |
9c541725 | 11557 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
11558 | lh = dwarf_decode_line_header (line_offset, cu); |
11559 | } | |
11560 | if (lh == NULL) | |
11561 | { | |
11562 | if (first_time) | |
11563 | dwarf2_start_symtab (cu, "", NULL, 0); | |
11564 | else | |
11565 | { | |
11566 | gdb_assert (tu_group->symtabs == NULL); | |
804d2729 TT |
11567 | gdb_assert (cu->builder == nullptr); |
11568 | struct compunit_symtab *cust = tu_group->compunit_symtab; | |
11569 | cu->builder.reset (new struct buildsym_compunit | |
11570 | (COMPUNIT_OBJFILE (cust), "", | |
11571 | COMPUNIT_DIRNAME (cust), | |
11572 | compunit_language (cust), | |
11573 | 0, cust)); | |
f4dc4d17 | 11574 | } |
f4dc4d17 | 11575 | return; |
3019eac3 DE |
11576 | } |
11577 | ||
4c8aa72d PA |
11578 | cu->line_header = lh.release (); |
11579 | cu->line_header_die_owner = die; | |
3019eac3 | 11580 | |
f4dc4d17 DE |
11581 | if (first_time) |
11582 | { | |
43f3e411 | 11583 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 11584 | |
1fd60fc0 DE |
11585 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
11586 | still initializing it, and our caller (a few levels up) | |
11587 | process_full_type_unit still needs to know if this is the first | |
11588 | time. */ | |
11589 | ||
4c8aa72d PA |
11590 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
11591 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
11592 | cu->line_header->file_names.size ()); | |
3019eac3 | 11593 | |
4c8aa72d | 11594 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 11595 | { |
4c8aa72d | 11596 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 11597 | |
804d2729 | 11598 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 11599 | |
804d2729 | 11600 | if (cu->builder->get_current_subfile ()->symtab == NULL) |
f4dc4d17 | 11601 | { |
4c8aa72d PA |
11602 | /* NOTE: start_subfile will recognize when it's been |
11603 | passed a file it has already seen. So we can't | |
11604 | assume there's a simple mapping from | |
11605 | cu->line_header->file_names to subfiles, plus | |
11606 | cu->line_header->file_names may contain dups. */ | |
804d2729 TT |
11607 | cu->builder->get_current_subfile ()->symtab |
11608 | = allocate_symtab (cust, | |
11609 | cu->builder->get_current_subfile ()->name); | |
f4dc4d17 DE |
11610 | } |
11611 | ||
804d2729 | 11612 | fe.symtab = cu->builder->get_current_subfile ()->symtab; |
8c43009f | 11613 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
11614 | } |
11615 | } | |
11616 | else | |
3019eac3 | 11617 | { |
804d2729 TT |
11618 | gdb_assert (cu->builder == nullptr); |
11619 | struct compunit_symtab *cust = tu_group->compunit_symtab; | |
11620 | cu->builder.reset (new struct buildsym_compunit | |
11621 | (COMPUNIT_OBJFILE (cust), "", | |
11622 | COMPUNIT_DIRNAME (cust), | |
11623 | compunit_language (cust), | |
11624 | 0, cust)); | |
f4dc4d17 | 11625 | |
4c8aa72d | 11626 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 11627 | { |
4c8aa72d | 11628 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 11629 | |
4c8aa72d | 11630 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11631 | } |
3019eac3 DE |
11632 | } |
11633 | ||
f4dc4d17 DE |
11634 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11635 | so they don't have a "real" (so to speak) symtab anyway. | |
11636 | There is later code that will assign the main symtab to all symbols | |
11637 | that don't have one. We need to handle the case of a symbol with a | |
11638 | missing symtab (DW_AT_decl_file) anyway. */ | |
11639 | } | |
3019eac3 | 11640 | |
f4dc4d17 DE |
11641 | /* Process DW_TAG_type_unit. |
11642 | For TUs we want to skip the first top level sibling if it's not the | |
11643 | actual type being defined by this TU. In this case the first top | |
11644 | level sibling is there to provide context only. */ | |
3019eac3 | 11645 | |
f4dc4d17 DE |
11646 | static void |
11647 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11648 | { | |
11649 | struct die_info *child_die; | |
3019eac3 | 11650 | |
f4dc4d17 DE |
11651 | prepare_one_comp_unit (cu, die, language_minimal); |
11652 | ||
11653 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11654 | We do this before processing child DIEs, so that the line header table | |
11655 | is available for DW_AT_decl_file. */ | |
11656 | setup_type_unit_groups (die, cu); | |
11657 | ||
11658 | if (die->child != NULL) | |
11659 | { | |
11660 | child_die = die->child; | |
11661 | while (child_die && child_die->tag) | |
11662 | { | |
11663 | process_die (child_die, cu); | |
11664 | child_die = sibling_die (child_die); | |
11665 | } | |
11666 | } | |
3019eac3 DE |
11667 | } |
11668 | \f | |
80626a55 DE |
11669 | /* DWO/DWP files. |
11670 | ||
11671 | http://gcc.gnu.org/wiki/DebugFission | |
11672 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11673 | ||
11674 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11675 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11676 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11677 | |
11678 | static hashval_t | |
11679 | hash_dwo_file (const void *item) | |
11680 | { | |
9a3c8263 | 11681 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11682 | hashval_t hash; |
3019eac3 | 11683 | |
a2ce51a0 DE |
11684 | hash = htab_hash_string (dwo_file->dwo_name); |
11685 | if (dwo_file->comp_dir != NULL) | |
11686 | hash += htab_hash_string (dwo_file->comp_dir); | |
11687 | return hash; | |
3019eac3 DE |
11688 | } |
11689 | ||
11690 | static int | |
11691 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11692 | { | |
9a3c8263 SM |
11693 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11694 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11695 | |
a2ce51a0 DE |
11696 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11697 | return 0; | |
11698 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11699 | return lhs->comp_dir == rhs->comp_dir; | |
11700 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11701 | } |
11702 | ||
11703 | /* Allocate a hash table for DWO files. */ | |
11704 | ||
11705 | static htab_t | |
ed2dc618 | 11706 | allocate_dwo_file_hash_table (struct objfile *objfile) |
3019eac3 | 11707 | { |
3019eac3 DE |
11708 | return htab_create_alloc_ex (41, |
11709 | hash_dwo_file, | |
11710 | eq_dwo_file, | |
11711 | NULL, | |
11712 | &objfile->objfile_obstack, | |
11713 | hashtab_obstack_allocate, | |
11714 | dummy_obstack_deallocate); | |
11715 | } | |
11716 | ||
80626a55 DE |
11717 | /* Lookup DWO file DWO_NAME. */ |
11718 | ||
11719 | static void ** | |
ed2dc618 SM |
11720 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11721 | const char *dwo_name, | |
11722 | const char *comp_dir) | |
80626a55 DE |
11723 | { |
11724 | struct dwo_file find_entry; | |
11725 | void **slot; | |
11726 | ||
11727 | if (dwarf2_per_objfile->dwo_files == NULL) | |
ed2dc618 SM |
11728 | dwarf2_per_objfile->dwo_files |
11729 | = allocate_dwo_file_hash_table (dwarf2_per_objfile->objfile); | |
80626a55 DE |
11730 | |
11731 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
11732 | find_entry.dwo_name = dwo_name; |
11733 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
11734 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
11735 | ||
11736 | return slot; | |
11737 | } | |
11738 | ||
3019eac3 DE |
11739 | static hashval_t |
11740 | hash_dwo_unit (const void *item) | |
11741 | { | |
9a3c8263 | 11742 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11743 | |
11744 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11745 | return dwo_unit->signature; | |
11746 | } | |
11747 | ||
11748 | static int | |
11749 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11750 | { | |
9a3c8263 SM |
11751 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11752 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11753 | |
11754 | /* The signature is assumed to be unique within the DWO file. | |
11755 | So while object file CU dwo_id's always have the value zero, | |
11756 | that's OK, assuming each object file DWO file has only one CU, | |
11757 | and that's the rule for now. */ | |
11758 | return lhs->signature == rhs->signature; | |
11759 | } | |
11760 | ||
11761 | /* Allocate a hash table for DWO CUs,TUs. | |
11762 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11763 | ||
11764 | static htab_t | |
11765 | allocate_dwo_unit_table (struct objfile *objfile) | |
11766 | { | |
11767 | /* Start out with a pretty small number. | |
11768 | Generally DWO files contain only one CU and maybe some TUs. */ | |
11769 | return htab_create_alloc_ex (3, | |
11770 | hash_dwo_unit, | |
11771 | eq_dwo_unit, | |
11772 | NULL, | |
11773 | &objfile->objfile_obstack, | |
11774 | hashtab_obstack_allocate, | |
11775 | dummy_obstack_deallocate); | |
11776 | } | |
11777 | ||
80626a55 | 11778 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 11779 | |
19c3d4c9 | 11780 | struct create_dwo_cu_data |
3019eac3 DE |
11781 | { |
11782 | struct dwo_file *dwo_file; | |
19c3d4c9 | 11783 | struct dwo_unit dwo_unit; |
3019eac3 DE |
11784 | }; |
11785 | ||
19c3d4c9 | 11786 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11787 | |
11788 | static void | |
19c3d4c9 DE |
11789 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11790 | const gdb_byte *info_ptr, | |
11791 | struct die_info *comp_unit_die, | |
11792 | int has_children, | |
11793 | void *datap) | |
3019eac3 DE |
11794 | { |
11795 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11796 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11797 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 11798 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 11799 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 11800 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 11801 | struct attribute *attr; |
3019eac3 DE |
11802 | |
11803 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
11804 | if (attr == NULL) | |
11805 | { | |
b98664d3 | 11806 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11807 | " its dwo_id [in module %s]"), |
9d8780f0 | 11808 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11809 | return; |
11810 | } | |
11811 | ||
3019eac3 DE |
11812 | dwo_unit->dwo_file = dwo_file; |
11813 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 11814 | dwo_unit->section = section; |
9c541725 | 11815 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11816 | dwo_unit->length = cu->per_cu->length; |
11817 | ||
b4f54984 | 11818 | if (dwarf_read_debug) |
9d8780f0 SM |
11819 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11820 | sect_offset_str (sect_off), | |
9c541725 | 11821 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11822 | } |
11823 | ||
33c5cd75 | 11824 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11825 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11826 | |
33c5cd75 | 11827 | static void |
ed2dc618 SM |
11828 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11829 | struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
33c5cd75 | 11830 | htab_t &cus_htab) |
3019eac3 DE |
11831 | { |
11832 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11833 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11834 | |
33c5cd75 DB |
11835 | dwarf2_read_section (objfile, §ion); |
11836 | info_ptr = section.buffer; | |
3019eac3 DE |
11837 | |
11838 | if (info_ptr == NULL) | |
33c5cd75 | 11839 | return; |
3019eac3 | 11840 | |
b4f54984 | 11841 | if (dwarf_read_debug) |
19c3d4c9 DE |
11842 | { |
11843 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
11844 | get_section_name (§ion), |
11845 | get_section_file_name (§ion)); | |
19c3d4c9 | 11846 | } |
3019eac3 | 11847 | |
33c5cd75 | 11848 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11849 | while (info_ptr < end_ptr) |
11850 | { | |
11851 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
11852 | struct create_dwo_cu_data create_dwo_cu_data; |
11853 | struct dwo_unit *dwo_unit; | |
11854 | void **slot; | |
11855 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 11856 | |
19c3d4c9 DE |
11857 | memset (&create_dwo_cu_data.dwo_unit, 0, |
11858 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 | 11859 | memset (&per_cu, 0, sizeof (per_cu)); |
e3b94546 | 11860 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11861 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11862 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11863 | per_cu.section = §ion; | |
c5ed0576 | 11864 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
11865 | |
11866 | init_cutu_and_read_dies_no_follow ( | |
11867 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
11868 | info_ptr += per_cu.length; | |
11869 | ||
11870 | // If the unit could not be parsed, skip it. | |
11871 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
11872 | continue; | |
3019eac3 | 11873 | |
33c5cd75 DB |
11874 | if (cus_htab == NULL) |
11875 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 11876 | |
33c5cd75 DB |
11877 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
11878 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
11879 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
11880 | gdb_assert (slot != NULL); | |
11881 | if (*slot != NULL) | |
19c3d4c9 | 11882 | { |
33c5cd75 DB |
11883 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11884 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11885 | |
b98664d3 | 11886 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11887 | " the entry at offset %s, signature %s"), |
11888 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11889 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11890 | } |
33c5cd75 | 11891 | *slot = (void *)dwo_unit; |
3019eac3 | 11892 | } |
3019eac3 DE |
11893 | } |
11894 | ||
80626a55 DE |
11895 | /* DWP file .debug_{cu,tu}_index section format: |
11896 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11897 | ||
d2415c6c DE |
11898 | DWP Version 1: |
11899 | ||
80626a55 DE |
11900 | Both index sections have the same format, and serve to map a 64-bit |
11901 | signature to a set of section numbers. Each section begins with a header, | |
11902 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11903 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11904 | aligned at 8-byte boundaries in the file. | |
11905 | ||
d2415c6c DE |
11906 | The index section header consists of: |
11907 | ||
11908 | V, 32 bit version number | |
11909 | -, 32 bits unused | |
11910 | N, 32 bit number of compilation units or type units in the index | |
11911 | M, 32 bit number of slots in the hash table | |
80626a55 | 11912 | |
d2415c6c | 11913 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11914 | |
d2415c6c DE |
11915 | The hash table begins at offset 16 in the section, and consists of an array |
11916 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11917 | order of the application binary). Unused slots in the hash table are 0. | |
11918 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11919 | |
d2415c6c DE |
11920 | The parallel table begins immediately after the hash table |
11921 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11922 | array of 32-bit indexes (using the byte order of the application binary), | |
11923 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11924 | table contains a 32-bit index into the pool of section numbers. For unused | |
11925 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11926 | |
73869dc2 DE |
11927 | The pool of section numbers begins immediately following the hash table |
11928 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11929 | section numbers consists of an array of 32-bit words (using the byte order | |
11930 | of the application binary). Each item in the array is indexed starting | |
11931 | from 0. The hash table entry provides the index of the first section | |
11932 | number in the set. Additional section numbers in the set follow, and the | |
11933 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
11934 | ||
11935 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
11936 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
11937 | be the second entry. Other members of the set may follow in any order. | |
11938 | ||
11939 | --- | |
11940 | ||
11941 | DWP Version 2: | |
11942 | ||
11943 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
11944 | and the entries in the index tables are now offsets into these sections. | |
11945 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
11946 | section. | |
11947 | ||
11948 | Index Section Contents: | |
11949 | Header | |
11950 | Hash Table of Signatures dwp_hash_table.hash_table | |
11951 | Parallel Table of Indices dwp_hash_table.unit_table | |
11952 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
11953 | Table of Section Sizes dwp_hash_table.v2.sizes | |
11954 | ||
11955 | The index section header consists of: | |
11956 | ||
11957 | V, 32 bit version number | |
11958 | L, 32 bit number of columns in the table of section offsets | |
11959 | N, 32 bit number of compilation units or type units in the index | |
11960 | M, 32 bit number of slots in the hash table | |
11961 | ||
11962 | Numbers are recorded using the byte order of the application binary. | |
11963 | ||
11964 | The hash table has the same format as version 1. | |
11965 | The parallel table of indices has the same format as version 1, | |
11966 | except that the entries are origin-1 indices into the table of sections | |
11967 | offsets and the table of section sizes. | |
11968 | ||
11969 | The table of offsets begins immediately following the parallel table | |
11970 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11971 | a two-dimensional array of 32-bit words (using the byte order of the | |
11972 | application binary), with L columns and N+1 rows, in row-major order. | |
11973 | Each row in the array is indexed starting from 0. The first row provides | |
11974 | a key to the remaining rows: each column in this row provides an identifier | |
11975 | for a debug section, and the offsets in the same column of subsequent rows | |
11976 | refer to that section. The section identifiers are: | |
11977 | ||
11978 | DW_SECT_INFO 1 .debug_info.dwo | |
11979 | DW_SECT_TYPES 2 .debug_types.dwo | |
11980 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11981 | DW_SECT_LINE 4 .debug_line.dwo | |
11982 | DW_SECT_LOC 5 .debug_loc.dwo | |
11983 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11984 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11985 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11986 | ||
11987 | The offsets provided by the CU and TU index sections are the base offsets | |
11988 | for the contributions made by each CU or TU to the corresponding section | |
11989 | in the package file. Each CU and TU header contains an abbrev_offset | |
11990 | field, used to find the abbreviations table for that CU or TU within the | |
11991 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11992 | be interpreted as relative to the base offset given in the index section. | |
11993 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11994 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11995 | and offsets into other debug sections obtained from DWARF attributes should | |
11996 | also be interpreted as relative to the corresponding base offset. | |
11997 | ||
11998 | The table of sizes begins immediately following the table of offsets. | |
11999 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
12000 | with L columns and N rows, in row-major order. Each row in the array is | |
12001 | indexed starting from 1 (row 0 is shared by the two tables). | |
12002 | ||
12003 | --- | |
12004 | ||
12005 | Hash table lookup is handled the same in version 1 and 2: | |
12006 | ||
12007 | We assume that N and M will not exceed 2^32 - 1. | |
12008 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
12009 | ||
d2415c6c DE |
12010 | Given a 64-bit compilation unit signature or a type signature S, an entry |
12011 | in the hash table is located as follows: | |
80626a55 | 12012 | |
d2415c6c DE |
12013 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
12014 | the low-order k bits all set to 1. | |
80626a55 | 12015 | |
d2415c6c | 12016 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 12017 | |
d2415c6c DE |
12018 | 3) If the hash table entry at index H matches the signature, use that |
12019 | entry. If the hash table entry at index H is unused (all zeroes), | |
12020 | terminate the search: the signature is not present in the table. | |
80626a55 | 12021 | |
d2415c6c | 12022 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 12023 | |
d2415c6c | 12024 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 12025 | to stop at an unused slot or find the match. */ |
80626a55 DE |
12026 | |
12027 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
12028 | .debug_{info,types}.dwo in DWP_FILE. | |
12029 | Returns NULL if there isn't one. | |
12030 | Note: This function processes DWP files only, not DWO files. */ | |
12031 | ||
12032 | static struct dwp_hash_table * | |
ed2dc618 SM |
12033 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12034 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
12035 | { |
12036 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 12037 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 12038 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 12039 | struct dwarf2_section_info *index; |
73869dc2 | 12040 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
12041 | struct dwp_hash_table *htab; |
12042 | ||
12043 | if (is_debug_types) | |
12044 | index = &dwp_file->sections.tu_index; | |
12045 | else | |
12046 | index = &dwp_file->sections.cu_index; | |
12047 | ||
12048 | if (dwarf2_section_empty_p (index)) | |
12049 | return NULL; | |
12050 | dwarf2_read_section (objfile, index); | |
12051 | ||
12052 | index_ptr = index->buffer; | |
12053 | index_end = index_ptr + index->size; | |
12054 | ||
12055 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
12056 | index_ptr += 4; |
12057 | if (version == 2) | |
12058 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
12059 | else | |
12060 | nr_columns = 0; | |
12061 | index_ptr += 4; | |
80626a55 DE |
12062 | nr_units = read_4_bytes (dbfd, index_ptr); |
12063 | index_ptr += 4; | |
12064 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
12065 | index_ptr += 4; | |
12066 | ||
73869dc2 | 12067 | if (version != 1 && version != 2) |
80626a55 | 12068 | { |
21aa081e | 12069 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 12070 | " [in module %s]"), |
21aa081e | 12071 | pulongest (version), dwp_file->name); |
80626a55 DE |
12072 | } |
12073 | if (nr_slots != (nr_slots & -nr_slots)) | |
12074 | { | |
21aa081e | 12075 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 12076 | " is not power of 2 [in module %s]"), |
21aa081e | 12077 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
12078 | } |
12079 | ||
12080 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
12081 | htab->version = version; |
12082 | htab->nr_columns = nr_columns; | |
80626a55 DE |
12083 | htab->nr_units = nr_units; |
12084 | htab->nr_slots = nr_slots; | |
12085 | htab->hash_table = index_ptr; | |
12086 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
12087 | |
12088 | /* Exit early if the table is empty. */ | |
12089 | if (nr_slots == 0 || nr_units == 0 | |
12090 | || (version == 2 && nr_columns == 0)) | |
12091 | { | |
12092 | /* All must be zero. */ | |
12093 | if (nr_slots != 0 || nr_units != 0 | |
12094 | || (version == 2 && nr_columns != 0)) | |
12095 | { | |
b98664d3 | 12096 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
12097 | " all zero [in modules %s]"), |
12098 | dwp_file->name); | |
12099 | } | |
12100 | return htab; | |
12101 | } | |
12102 | ||
12103 | if (version == 1) | |
12104 | { | |
12105 | htab->section_pool.v1.indices = | |
12106 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12107 | /* It's harder to decide whether the section is too small in v1. | |
12108 | V1 is deprecated anyway so we punt. */ | |
12109 | } | |
12110 | else | |
12111 | { | |
12112 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12113 | int *ids = htab->section_pool.v2.section_ids; | |
12114 | /* Reverse map for error checking. */ | |
12115 | int ids_seen[DW_SECT_MAX + 1]; | |
12116 | int i; | |
12117 | ||
12118 | if (nr_columns < 2) | |
12119 | { | |
12120 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
12121 | " in section table [in module %s]"), | |
12122 | dwp_file->name); | |
12123 | } | |
12124 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
12125 | { | |
12126 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
12127 | " in section table [in module %s]"), | |
12128 | dwp_file->name); | |
12129 | } | |
12130 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
12131 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
12132 | for (i = 0; i < nr_columns; ++i) | |
12133 | { | |
12134 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
12135 | ||
12136 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
12137 | { | |
12138 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
12139 | " in section table [in module %s]"), | |
12140 | id, dwp_file->name); | |
12141 | } | |
12142 | if (ids_seen[id] != -1) | |
12143 | { | |
12144 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
12145 | " id %d in section table [in module %s]"), | |
12146 | id, dwp_file->name); | |
12147 | } | |
12148 | ids_seen[id] = i; | |
12149 | ids[i] = id; | |
12150 | } | |
12151 | /* Must have exactly one info or types section. */ | |
12152 | if (((ids_seen[DW_SECT_INFO] != -1) | |
12153 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
12154 | != 1) | |
12155 | { | |
12156 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
12157 | " DWO info/types section [in module %s]"), | |
12158 | dwp_file->name); | |
12159 | } | |
12160 | /* Must have an abbrev section. */ | |
12161 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
12162 | { | |
12163 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
12164 | " section [in module %s]"), | |
12165 | dwp_file->name); | |
12166 | } | |
12167 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
12168 | htab->section_pool.v2.sizes = | |
12169 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
12170 | * nr_units * nr_columns); | |
12171 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
12172 | * nr_units * nr_columns)) | |
12173 | > index_end) | |
12174 | { | |
12175 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
12176 | " [in module %s]"), | |
12177 | dwp_file->name); | |
12178 | } | |
12179 | } | |
80626a55 DE |
12180 | |
12181 | return htab; | |
12182 | } | |
12183 | ||
12184 | /* Update SECTIONS with the data from SECTP. | |
12185 | ||
12186 | This function is like the other "locate" section routines that are | |
12187 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 12188 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
12189 | |
12190 | The result is non-zero for success, or zero if an error was found. */ | |
12191 | ||
12192 | static int | |
73869dc2 DE |
12193 | locate_v1_virtual_dwo_sections (asection *sectp, |
12194 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
12195 | { |
12196 | const struct dwop_section_names *names = &dwop_section_names; | |
12197 | ||
12198 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12199 | { | |
12200 | /* There can be only one. */ | |
049412e3 | 12201 | if (sections->abbrev.s.section != NULL) |
80626a55 | 12202 | return 0; |
049412e3 | 12203 | sections->abbrev.s.section = sectp; |
80626a55 DE |
12204 | sections->abbrev.size = bfd_get_section_size (sectp); |
12205 | } | |
12206 | else if (section_is_p (sectp->name, &names->info_dwo) | |
12207 | || section_is_p (sectp->name, &names->types_dwo)) | |
12208 | { | |
12209 | /* There can be only one. */ | |
049412e3 | 12210 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 12211 | return 0; |
049412e3 | 12212 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
12213 | sections->info_or_types.size = bfd_get_section_size (sectp); |
12214 | } | |
12215 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12216 | { | |
12217 | /* There can be only one. */ | |
049412e3 | 12218 | if (sections->line.s.section != NULL) |
80626a55 | 12219 | return 0; |
049412e3 | 12220 | sections->line.s.section = sectp; |
80626a55 DE |
12221 | sections->line.size = bfd_get_section_size (sectp); |
12222 | } | |
12223 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12224 | { | |
12225 | /* There can be only one. */ | |
049412e3 | 12226 | if (sections->loc.s.section != NULL) |
80626a55 | 12227 | return 0; |
049412e3 | 12228 | sections->loc.s.section = sectp; |
80626a55 DE |
12229 | sections->loc.size = bfd_get_section_size (sectp); |
12230 | } | |
12231 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12232 | { | |
12233 | /* There can be only one. */ | |
049412e3 | 12234 | if (sections->macinfo.s.section != NULL) |
80626a55 | 12235 | return 0; |
049412e3 | 12236 | sections->macinfo.s.section = sectp; |
80626a55 DE |
12237 | sections->macinfo.size = bfd_get_section_size (sectp); |
12238 | } | |
12239 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12240 | { | |
12241 | /* There can be only one. */ | |
049412e3 | 12242 | if (sections->macro.s.section != NULL) |
80626a55 | 12243 | return 0; |
049412e3 | 12244 | sections->macro.s.section = sectp; |
80626a55 DE |
12245 | sections->macro.size = bfd_get_section_size (sectp); |
12246 | } | |
12247 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12248 | { | |
12249 | /* There can be only one. */ | |
049412e3 | 12250 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 12251 | return 0; |
049412e3 | 12252 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
12253 | sections->str_offsets.size = bfd_get_section_size (sectp); |
12254 | } | |
12255 | else | |
12256 | { | |
12257 | /* No other kind of section is valid. */ | |
12258 | return 0; | |
12259 | } | |
12260 | ||
12261 | return 1; | |
12262 | } | |
12263 | ||
73869dc2 DE |
12264 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
12265 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12266 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12267 | This is for DWP version 1 files. */ | |
80626a55 DE |
12268 | |
12269 | static struct dwo_unit * | |
ed2dc618 SM |
12270 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12271 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12272 | uint32_t unit_index, |
12273 | const char *comp_dir, | |
12274 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
12275 | { |
12276 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
12277 | const struct dwp_hash_table *dwp_htab = |
12278 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12279 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
12280 | const char *kind = is_debug_types ? "TU" : "CU"; |
12281 | struct dwo_file *dwo_file; | |
12282 | struct dwo_unit *dwo_unit; | |
73869dc2 | 12283 | struct virtual_v1_dwo_sections sections; |
80626a55 | 12284 | void **dwo_file_slot; |
80626a55 DE |
12285 | int i; |
12286 | ||
73869dc2 DE |
12287 | gdb_assert (dwp_file->version == 1); |
12288 | ||
b4f54984 | 12289 | if (dwarf_read_debug) |
80626a55 | 12290 | { |
73869dc2 | 12291 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 12292 | kind, |
73869dc2 | 12293 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
12294 | dwp_file->name); |
12295 | } | |
12296 | ||
19ac8c2e | 12297 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
12298 | Put a limit on the number of sections we look for so that bad data |
12299 | doesn't cause us to loop forever. */ | |
12300 | ||
73869dc2 | 12301 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
12302 | (1 /* .debug_info or .debug_types */ \ |
12303 | + 1 /* .debug_abbrev */ \ | |
12304 | + 1 /* .debug_line */ \ | |
12305 | + 1 /* .debug_loc */ \ | |
12306 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 12307 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
12308 | + 1 /* trailing zero */) |
12309 | ||
12310 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 12311 | |
73869dc2 | 12312 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
12313 | { |
12314 | asection *sectp; | |
12315 | uint32_t section_nr = | |
12316 | read_4_bytes (dbfd, | |
73869dc2 DE |
12317 | dwp_htab->section_pool.v1.indices |
12318 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
12319 | |
12320 | if (section_nr == 0) | |
12321 | break; | |
12322 | if (section_nr >= dwp_file->num_sections) | |
12323 | { | |
12324 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
12325 | " [in module %s]"), | |
12326 | dwp_file->name); | |
12327 | } | |
12328 | ||
12329 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 12330 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
12331 | { |
12332 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
12333 | " [in module %s]"), | |
12334 | dwp_file->name); | |
12335 | } | |
12336 | } | |
12337 | ||
12338 | if (i < 2 | |
a32a8923 DE |
12339 | || dwarf2_section_empty_p (§ions.info_or_types) |
12340 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
12341 | { |
12342 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
12343 | " [in module %s]"), | |
12344 | dwp_file->name); | |
12345 | } | |
73869dc2 | 12346 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
12347 | { |
12348 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
12349 | " [in module %s]"), | |
12350 | dwp_file->name); | |
12351 | } | |
12352 | ||
12353 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12354 | have dwo_unit "live" in that. At least for now. | |
12355 | ||
12356 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 12357 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
12358 | file, we can combine them back into a virtual DWO file to save space |
12359 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
12360 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
12361 | ||
791afaa2 TT |
12362 | std::string virtual_dwo_name = |
12363 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
12364 | get_section_id (§ions.abbrev), | |
12365 | get_section_id (§ions.line), | |
12366 | get_section_id (§ions.loc), | |
12367 | get_section_id (§ions.str_offsets)); | |
80626a55 | 12368 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12369 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12370 | virtual_dwo_name.c_str (), | |
12371 | comp_dir); | |
80626a55 DE |
12372 | /* Create one if necessary. */ |
12373 | if (*dwo_file_slot == NULL) | |
12374 | { | |
b4f54984 | 12375 | if (dwarf_read_debug) |
80626a55 DE |
12376 | { |
12377 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12378 | virtual_dwo_name.c_str ()); |
80626a55 DE |
12379 | } |
12380 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
12381 | dwo_file->dwo_name |
12382 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
12383 | virtual_dwo_name.c_str (), |
12384 | virtual_dwo_name.size ()); | |
0ac5b59e | 12385 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
12386 | dwo_file->sections.abbrev = sections.abbrev; |
12387 | dwo_file->sections.line = sections.line; | |
12388 | dwo_file->sections.loc = sections.loc; | |
12389 | dwo_file->sections.macinfo = sections.macinfo; | |
12390 | dwo_file->sections.macro = sections.macro; | |
12391 | dwo_file->sections.str_offsets = sections.str_offsets; | |
12392 | /* The "str" section is global to the entire DWP file. */ | |
12393 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 12394 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
12395 | there's no need to record it in dwo_file. |
12396 | Also, we can't simply record type sections in dwo_file because | |
12397 | we record a pointer into the vector in dwo_unit. As we collect more | |
12398 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
12399 | for it, invalidating all copies of pointers into the previous |
12400 | contents. */ | |
80626a55 DE |
12401 | *dwo_file_slot = dwo_file; |
12402 | } | |
12403 | else | |
12404 | { | |
b4f54984 | 12405 | if (dwarf_read_debug) |
80626a55 DE |
12406 | { |
12407 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12408 | virtual_dwo_name.c_str ()); |
80626a55 | 12409 | } |
9a3c8263 | 12410 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 12411 | } |
80626a55 DE |
12412 | |
12413 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12414 | dwo_unit->dwo_file = dwo_file; | |
12415 | dwo_unit->signature = signature; | |
8d749320 SM |
12416 | dwo_unit->section = |
12417 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 12418 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 12419 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
12420 | |
12421 | return dwo_unit; | |
12422 | } | |
12423 | ||
73869dc2 DE |
12424 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
12425 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
12426 | piece within that section used by a TU/CU, return a virtual section | |
12427 | of just that piece. */ | |
12428 | ||
12429 | static struct dwarf2_section_info | |
ed2dc618 SM |
12430 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12431 | struct dwarf2_section_info *section, | |
73869dc2 DE |
12432 | bfd_size_type offset, bfd_size_type size) |
12433 | { | |
12434 | struct dwarf2_section_info result; | |
12435 | asection *sectp; | |
12436 | ||
12437 | gdb_assert (section != NULL); | |
12438 | gdb_assert (!section->is_virtual); | |
12439 | ||
12440 | memset (&result, 0, sizeof (result)); | |
12441 | result.s.containing_section = section; | |
12442 | result.is_virtual = 1; | |
12443 | ||
12444 | if (size == 0) | |
12445 | return result; | |
12446 | ||
12447 | sectp = get_section_bfd_section (section); | |
12448 | ||
12449 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
12450 | bounds of the real section. This is a pretty-rare event, so just | |
12451 | flag an error (easier) instead of a warning and trying to cope. */ | |
12452 | if (sectp == NULL | |
12453 | || offset + size > bfd_get_section_size (sectp)) | |
12454 | { | |
73869dc2 DE |
12455 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
12456 | " in section %s [in module %s]"), | |
12457 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
12458 | objfile_name (dwarf2_per_objfile->objfile)); | |
12459 | } | |
12460 | ||
12461 | result.virtual_offset = offset; | |
12462 | result.size = size; | |
12463 | return result; | |
12464 | } | |
12465 | ||
12466 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
12467 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12468 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12469 | This is for DWP version 2 files. */ | |
12470 | ||
12471 | static struct dwo_unit * | |
ed2dc618 SM |
12472 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12473 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12474 | uint32_t unit_index, |
12475 | const char *comp_dir, | |
12476 | ULONGEST signature, int is_debug_types) | |
12477 | { | |
12478 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12479 | const struct dwp_hash_table *dwp_htab = | |
12480 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12481 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
12482 | const char *kind = is_debug_types ? "TU" : "CU"; |
12483 | struct dwo_file *dwo_file; | |
12484 | struct dwo_unit *dwo_unit; | |
12485 | struct virtual_v2_dwo_sections sections; | |
12486 | void **dwo_file_slot; | |
73869dc2 DE |
12487 | int i; |
12488 | ||
12489 | gdb_assert (dwp_file->version == 2); | |
12490 | ||
b4f54984 | 12491 | if (dwarf_read_debug) |
73869dc2 DE |
12492 | { |
12493 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
12494 | kind, | |
12495 | pulongest (unit_index), hex_string (signature), | |
12496 | dwp_file->name); | |
12497 | } | |
12498 | ||
12499 | /* Fetch the section offsets of this DWO unit. */ | |
12500 | ||
12501 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
12502 | |
12503 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
12504 | { | |
12505 | uint32_t offset = read_4_bytes (dbfd, | |
12506 | dwp_htab->section_pool.v2.offsets | |
12507 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12508 | + i) | |
12509 | * sizeof (uint32_t))); | |
12510 | uint32_t size = read_4_bytes (dbfd, | |
12511 | dwp_htab->section_pool.v2.sizes | |
12512 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12513 | + i) | |
12514 | * sizeof (uint32_t))); | |
12515 | ||
12516 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
12517 | { | |
12518 | case DW_SECT_INFO: | |
12519 | case DW_SECT_TYPES: | |
12520 | sections.info_or_types_offset = offset; | |
12521 | sections.info_or_types_size = size; | |
12522 | break; | |
12523 | case DW_SECT_ABBREV: | |
12524 | sections.abbrev_offset = offset; | |
12525 | sections.abbrev_size = size; | |
12526 | break; | |
12527 | case DW_SECT_LINE: | |
12528 | sections.line_offset = offset; | |
12529 | sections.line_size = size; | |
12530 | break; | |
12531 | case DW_SECT_LOC: | |
12532 | sections.loc_offset = offset; | |
12533 | sections.loc_size = size; | |
12534 | break; | |
12535 | case DW_SECT_STR_OFFSETS: | |
12536 | sections.str_offsets_offset = offset; | |
12537 | sections.str_offsets_size = size; | |
12538 | break; | |
12539 | case DW_SECT_MACINFO: | |
12540 | sections.macinfo_offset = offset; | |
12541 | sections.macinfo_size = size; | |
12542 | break; | |
12543 | case DW_SECT_MACRO: | |
12544 | sections.macro_offset = offset; | |
12545 | sections.macro_size = size; | |
12546 | break; | |
12547 | } | |
12548 | } | |
12549 | ||
12550 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12551 | have dwo_unit "live" in that. At least for now. | |
12552 | ||
12553 | The DWP file can be made up of a random collection of CUs and TUs. | |
12554 | However, for each CU + set of TUs that came from the same original DWO | |
12555 | file, we can combine them back into a virtual DWO file to save space | |
12556 | (fewer struct dwo_file objects to allocate). Remember that for really | |
12557 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
12558 | ||
791afaa2 TT |
12559 | std::string virtual_dwo_name = |
12560 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
12561 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
12562 | (long) (sections.line_size ? sections.line_offset : 0), | |
12563 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
12564 | (long) (sections.str_offsets_size | |
12565 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 12566 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12567 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12568 | virtual_dwo_name.c_str (), | |
12569 | comp_dir); | |
73869dc2 DE |
12570 | /* Create one if necessary. */ |
12571 | if (*dwo_file_slot == NULL) | |
12572 | { | |
b4f54984 | 12573 | if (dwarf_read_debug) |
73869dc2 DE |
12574 | { |
12575 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12576 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
12577 | } |
12578 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
12579 | dwo_file->dwo_name |
12580 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
12581 | virtual_dwo_name.c_str (), |
12582 | virtual_dwo_name.size ()); | |
73869dc2 DE |
12583 | dwo_file->comp_dir = comp_dir; |
12584 | dwo_file->sections.abbrev = | |
ed2dc618 | 12585 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
12586 | sections.abbrev_offset, sections.abbrev_size); |
12587 | dwo_file->sections.line = | |
ed2dc618 | 12588 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
12589 | sections.line_offset, sections.line_size); |
12590 | dwo_file->sections.loc = | |
ed2dc618 | 12591 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
12592 | sections.loc_offset, sections.loc_size); |
12593 | dwo_file->sections.macinfo = | |
ed2dc618 | 12594 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
12595 | sections.macinfo_offset, sections.macinfo_size); |
12596 | dwo_file->sections.macro = | |
ed2dc618 | 12597 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
12598 | sections.macro_offset, sections.macro_size); |
12599 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
12600 | create_dwp_v2_section (dwarf2_per_objfile, |
12601 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
12602 | sections.str_offsets_offset, |
12603 | sections.str_offsets_size); | |
12604 | /* The "str" section is global to the entire DWP file. */ | |
12605 | dwo_file->sections.str = dwp_file->sections.str; | |
12606 | /* The info or types section is assigned below to dwo_unit, | |
12607 | there's no need to record it in dwo_file. | |
12608 | Also, we can't simply record type sections in dwo_file because | |
12609 | we record a pointer into the vector in dwo_unit. As we collect more | |
12610 | types we'll grow the vector and eventually have to reallocate space | |
12611 | for it, invalidating all copies of pointers into the previous | |
12612 | contents. */ | |
12613 | *dwo_file_slot = dwo_file; | |
12614 | } | |
12615 | else | |
12616 | { | |
b4f54984 | 12617 | if (dwarf_read_debug) |
73869dc2 DE |
12618 | { |
12619 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12620 | virtual_dwo_name.c_str ()); |
73869dc2 | 12621 | } |
9a3c8263 | 12622 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 12623 | } |
73869dc2 DE |
12624 | |
12625 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12626 | dwo_unit->dwo_file = dwo_file; | |
12627 | dwo_unit->signature = signature; | |
8d749320 SM |
12628 | dwo_unit->section = |
12629 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
12630 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
12631 | is_debug_types | |
73869dc2 DE |
12632 | ? &dwp_file->sections.types |
12633 | : &dwp_file->sections.info, | |
12634 | sections.info_or_types_offset, | |
12635 | sections.info_or_types_size); | |
12636 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12637 | ||
12638 | return dwo_unit; | |
12639 | } | |
12640 | ||
57d63ce2 DE |
12641 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12642 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12643 | |
12644 | static struct dwo_unit * | |
ed2dc618 SM |
12645 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12646 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 12647 | ULONGEST signature, int is_debug_types) |
80626a55 | 12648 | { |
57d63ce2 DE |
12649 | const struct dwp_hash_table *dwp_htab = |
12650 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12651 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 12652 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12653 | uint32_t hash = signature & mask; |
12654 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12655 | unsigned int i; | |
12656 | void **slot; | |
870f88f7 | 12657 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12658 | |
12659 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12660 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
12661 | slot = htab_find_slot (is_debug_types |
12662 | ? dwp_file->loaded_tus | |
12663 | : dwp_file->loaded_cus, | |
12664 | &find_dwo_cu, INSERT); | |
80626a55 DE |
12665 | |
12666 | if (*slot != NULL) | |
9a3c8263 | 12667 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12668 | |
12669 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12670 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12671 | { |
12672 | ULONGEST signature_in_table; | |
12673 | ||
12674 | signature_in_table = | |
57d63ce2 | 12675 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12676 | if (signature_in_table == signature) |
12677 | { | |
57d63ce2 DE |
12678 | uint32_t unit_index = |
12679 | read_4_bytes (dbfd, | |
12680 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12681 | |
73869dc2 DE |
12682 | if (dwp_file->version == 1) |
12683 | { | |
ed2dc618 SM |
12684 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
12685 | dwp_file, unit_index, | |
73869dc2 DE |
12686 | comp_dir, signature, |
12687 | is_debug_types); | |
12688 | } | |
12689 | else | |
12690 | { | |
ed2dc618 SM |
12691 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
12692 | dwp_file, unit_index, | |
73869dc2 DE |
12693 | comp_dir, signature, |
12694 | is_debug_types); | |
12695 | } | |
9a3c8263 | 12696 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12697 | } |
12698 | if (signature_in_table == 0) | |
12699 | return NULL; | |
12700 | hash = (hash + hash2) & mask; | |
12701 | } | |
12702 | ||
12703 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12704 | " [in module %s]"), | |
12705 | dwp_file->name); | |
12706 | } | |
12707 | ||
ab5088bf | 12708 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12709 | Open the file specified by FILE_NAME and hand it off to BFD for |
12710 | preliminary analysis. Return a newly initialized bfd *, which | |
12711 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12712 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12713 | SEARCH_CWD is true if the current directory is to be searched. |
12714 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12715 | If successful, the file is added to the bfd include table of the |
12716 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12717 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12718 | NOTE: This function is derived from symfile_bfd_open. */ |
12719 | ||
192b62ce | 12720 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12721 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12722 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12723 | { |
24b9144d | 12724 | int desc; |
9c02c129 DE |
12725 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12726 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12727 | to debug_file_directory. */ | |
e0cc99a6 | 12728 | const char *search_path; |
9c02c129 DE |
12729 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12730 | ||
e0cc99a6 | 12731 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12732 | if (search_cwd) |
12733 | { | |
12734 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12735 | { |
12736 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12737 | debug_file_directory, | |
12738 | (char *) NULL)); | |
12739 | search_path = search_path_holder.get (); | |
12740 | } | |
6ac97d4c | 12741 | else |
e0cc99a6 | 12742 | search_path = "."; |
6ac97d4c | 12743 | } |
9c02c129 | 12744 | else |
e0cc99a6 | 12745 | search_path = debug_file_directory; |
3019eac3 | 12746 | |
24b9144d | 12747 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12748 | if (is_dwp) |
12749 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12750 | |
12751 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12752 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12753 | O_RDONLY | O_BINARY, &absolute_name); |
12754 | if (desc < 0) | |
12755 | return NULL; | |
12756 | ||
e0cc99a6 TT |
12757 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12758 | gnutarget, desc)); | |
9c02c129 DE |
12759 | if (sym_bfd == NULL) |
12760 | return NULL; | |
192b62ce | 12761 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12762 | |
192b62ce TT |
12763 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12764 | return NULL; | |
3019eac3 | 12765 | |
13aaf454 DE |
12766 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12767 | This is important because things like demangled_names_hash lives in the | |
12768 | objfile's per_bfd space and may have references to things like symbol | |
12769 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12770 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12771 | |
3019eac3 DE |
12772 | return sym_bfd; |
12773 | } | |
12774 | ||
ab5088bf | 12775 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12776 | COMP_DIR is the DW_AT_comp_dir attribute. |
12777 | The result is the bfd handle of the file. | |
12778 | If there is a problem finding or opening the file, return NULL. | |
12779 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12780 | same as symfile_bfd_open. */ | |
12781 | ||
192b62ce | 12782 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12783 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12784 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12785 | { |
80626a55 | 12786 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12787 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12788 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12789 | |
12790 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12791 | ||
12792 | if (comp_dir != NULL) | |
12793 | { | |
b36cec19 PA |
12794 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
12795 | file_name, (char *) NULL); | |
3019eac3 DE |
12796 | |
12797 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12798 | search path, which seems useful. */ | |
ed2dc618 SM |
12799 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
12800 | path_to_try, | |
12801 | 0 /*is_dwp*/, | |
192b62ce | 12802 | 1 /*search_cwd*/)); |
3019eac3 DE |
12803 | xfree (path_to_try); |
12804 | if (abfd != NULL) | |
12805 | return abfd; | |
12806 | } | |
12807 | ||
12808 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12809 | is a list of paths. */ | |
12810 | ||
12811 | if (*debug_file_directory == '\0') | |
12812 | return NULL; | |
12813 | ||
ed2dc618 SM |
12814 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12815 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12816 | } |
12817 | ||
80626a55 DE |
12818 | /* This function is mapped across the sections and remembers the offset and |
12819 | size of each of the DWO debugging sections we are interested in. */ | |
12820 | ||
12821 | static void | |
12822 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12823 | { | |
9a3c8263 | 12824 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12825 | const struct dwop_section_names *names = &dwop_section_names; |
12826 | ||
12827 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12828 | { | |
049412e3 | 12829 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
12830 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
12831 | } | |
12832 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12833 | { | |
049412e3 | 12834 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
12835 | dwo_sections->info.size = bfd_get_section_size (sectp); |
12836 | } | |
12837 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12838 | { | |
049412e3 | 12839 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
12840 | dwo_sections->line.size = bfd_get_section_size (sectp); |
12841 | } | |
12842 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12843 | { | |
049412e3 | 12844 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
12845 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
12846 | } | |
12847 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12848 | { | |
049412e3 | 12849 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
12850 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
12851 | } | |
12852 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12853 | { | |
049412e3 | 12854 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
12855 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
12856 | } | |
12857 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12858 | { | |
049412e3 | 12859 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
12860 | dwo_sections->str.size = bfd_get_section_size (sectp); |
12861 | } | |
12862 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12863 | { | |
049412e3 | 12864 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
12865 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
12866 | } | |
12867 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12868 | { | |
12869 | struct dwarf2_section_info type_section; | |
12870 | ||
12871 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12872 | type_section.s.section = sectp; |
80626a55 DE |
12873 | type_section.size = bfd_get_section_size (sectp); |
12874 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
12875 | &type_section); | |
12876 | } | |
12877 | } | |
12878 | ||
ab5088bf | 12879 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12880 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12881 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12882 | |
12883 | static struct dwo_file * | |
0ac5b59e DE |
12884 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12885 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12886 | { |
ed2dc618 | 12887 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12888 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 12889 | |
ed2dc618 | 12890 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir)); |
80626a55 DE |
12891 | if (dbfd == NULL) |
12892 | { | |
b4f54984 | 12893 | if (dwarf_read_debug) |
80626a55 DE |
12894 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12895 | return NULL; | |
12896 | } | |
263db9a1 TT |
12897 | |
12898 | /* We use a unique pointer here, despite the obstack allocation, | |
12899 | because a dwo_file needs some cleanup if it is abandoned. */ | |
12900 | dwo_file_up dwo_file (OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
12901 | struct dwo_file)); | |
0ac5b59e DE |
12902 | dwo_file->dwo_name = dwo_name; |
12903 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 12904 | dwo_file->dbfd = dbfd.release (); |
3019eac3 | 12905 | |
192b62ce TT |
12906 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
12907 | &dwo_file->sections); | |
3019eac3 | 12908 | |
ed2dc618 SM |
12909 | create_cus_hash_table (dwarf2_per_objfile, *dwo_file, dwo_file->sections.info, |
12910 | dwo_file->cus); | |
3019eac3 | 12911 | |
263db9a1 | 12912 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12913 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12914 | |
b4f54984 | 12915 | if (dwarf_read_debug) |
80626a55 DE |
12916 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12917 | ||
263db9a1 | 12918 | return dwo_file.release (); |
3019eac3 DE |
12919 | } |
12920 | ||
80626a55 | 12921 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12922 | size of each of the DWP debugging sections common to version 1 and 2 that |
12923 | we are interested in. */ | |
3019eac3 | 12924 | |
80626a55 | 12925 | static void |
73869dc2 DE |
12926 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12927 | void *dwp_file_ptr) | |
3019eac3 | 12928 | { |
9a3c8263 | 12929 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12930 | const struct dwop_section_names *names = &dwop_section_names; |
12931 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12932 | |
80626a55 | 12933 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12934 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12935 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12936 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12937 | |
80626a55 DE |
12938 | /* Look for specific sections that we need. */ |
12939 | if (section_is_p (sectp->name, &names->str_dwo)) | |
12940 | { | |
049412e3 | 12941 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
12942 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
12943 | } | |
12944 | else if (section_is_p (sectp->name, &names->cu_index)) | |
12945 | { | |
049412e3 | 12946 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
12947 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
12948 | } | |
12949 | else if (section_is_p (sectp->name, &names->tu_index)) | |
12950 | { | |
049412e3 | 12951 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
12952 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
12953 | } | |
12954 | } | |
3019eac3 | 12955 | |
73869dc2 DE |
12956 | /* This function is mapped across the sections and remembers the offset and |
12957 | size of each of the DWP version 2 debugging sections that we are interested | |
12958 | in. This is split into a separate function because we don't know if we | |
12959 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
12960 | ||
12961 | static void | |
12962 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12963 | { | |
9a3c8263 | 12964 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12965 | const struct dwop_section_names *names = &dwop_section_names; |
12966 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12967 | ||
12968 | /* Record the ELF section number for later lookup: this is what the | |
12969 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12970 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12971 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12972 | ||
12973 | /* Look for specific sections that we need. */ | |
12974 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12975 | { | |
049412e3 | 12976 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
12977 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
12978 | } | |
12979 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12980 | { | |
049412e3 | 12981 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
12982 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
12983 | } | |
12984 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12985 | { | |
049412e3 | 12986 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
12987 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
12988 | } | |
12989 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12990 | { | |
049412e3 | 12991 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
12992 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
12993 | } | |
12994 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12995 | { | |
049412e3 | 12996 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
12997 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
12998 | } | |
12999 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
13000 | { | |
049412e3 | 13001 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
13002 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
13003 | } | |
13004 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13005 | { | |
049412e3 | 13006 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
13007 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
13008 | } | |
13009 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13010 | { | |
049412e3 | 13011 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
13012 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
13013 | } | |
13014 | } | |
13015 | ||
80626a55 | 13016 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13017 | |
80626a55 DE |
13018 | static hashval_t |
13019 | hash_dwp_loaded_cutus (const void *item) | |
13020 | { | |
9a3c8263 | 13021 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 13022 | |
80626a55 DE |
13023 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
13024 | return dwo_unit->signature; | |
3019eac3 DE |
13025 | } |
13026 | ||
80626a55 | 13027 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13028 | |
80626a55 DE |
13029 | static int |
13030 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 13031 | { |
9a3c8263 SM |
13032 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
13033 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 13034 | |
80626a55 DE |
13035 | return dua->signature == dub->signature; |
13036 | } | |
3019eac3 | 13037 | |
80626a55 | 13038 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13039 | |
80626a55 DE |
13040 | static htab_t |
13041 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
13042 | { | |
13043 | return htab_create_alloc_ex (3, | |
13044 | hash_dwp_loaded_cutus, | |
13045 | eq_dwp_loaded_cutus, | |
13046 | NULL, | |
13047 | &objfile->objfile_obstack, | |
13048 | hashtab_obstack_allocate, | |
13049 | dummy_obstack_deallocate); | |
13050 | } | |
3019eac3 | 13051 | |
ab5088bf DE |
13052 | /* Try to open DWP file FILE_NAME. |
13053 | The result is the bfd handle of the file. | |
13054 | If there is a problem finding or opening the file, return NULL. | |
13055 | Upon success, the canonicalized path of the file is stored in the bfd, | |
13056 | same as symfile_bfd_open. */ | |
13057 | ||
192b62ce | 13058 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
13059 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
13060 | const char *file_name) | |
ab5088bf | 13061 | { |
ed2dc618 SM |
13062 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
13063 | 1 /*is_dwp*/, | |
192b62ce | 13064 | 1 /*search_cwd*/)); |
6ac97d4c DE |
13065 | if (abfd != NULL) |
13066 | return abfd; | |
13067 | ||
13068 | /* Work around upstream bug 15652. | |
13069 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
13070 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
13071 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
13072 | of the executable's path may have discarded the needed info. | |
13073 | [IWBN if the dwp file name was recorded in the executable, akin to | |
13074 | .gnu_debuglink, but that doesn't exist yet.] | |
13075 | Strip the directory from FILE_NAME and search again. */ | |
13076 | if (*debug_file_directory != '\0') | |
13077 | { | |
13078 | /* Don't implicitly search the current directory here. | |
13079 | If the user wants to search "." to handle this case, | |
13080 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
13081 | return try_open_dwop_file (dwarf2_per_objfile, |
13082 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
13083 | 0 /*search_cwd*/); |
13084 | } | |
13085 | ||
13086 | return NULL; | |
ab5088bf DE |
13087 | } |
13088 | ||
80626a55 DE |
13089 | /* Initialize the use of the DWP file for the current objfile. |
13090 | By convention the name of the DWP file is ${objfile}.dwp. | |
13091 | The result is NULL if it can't be found. */ | |
a766d390 | 13092 | |
400174b1 | 13093 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 13094 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
13095 | { |
13096 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 13097 | |
82bf32bc JK |
13098 | /* Try to find first .dwp for the binary file before any symbolic links |
13099 | resolving. */ | |
6c447423 DE |
13100 | |
13101 | /* If the objfile is a debug file, find the name of the real binary | |
13102 | file and get the name of dwp file from there. */ | |
d721ba37 | 13103 | std::string dwp_name; |
6c447423 DE |
13104 | if (objfile->separate_debug_objfile_backlink != NULL) |
13105 | { | |
13106 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
13107 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 13108 | |
d721ba37 | 13109 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
13110 | } |
13111 | else | |
d721ba37 PA |
13112 | dwp_name = objfile->original_name; |
13113 | ||
13114 | dwp_name += ".dwp"; | |
80626a55 | 13115 | |
ed2dc618 | 13116 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
13117 | if (dbfd == NULL |
13118 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
13119 | { | |
13120 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
13121 | dwp_name = objfile_name (objfile); |
13122 | dwp_name += ".dwp"; | |
ed2dc618 | 13123 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
13124 | } |
13125 | ||
80626a55 DE |
13126 | if (dbfd == NULL) |
13127 | { | |
b4f54984 | 13128 | if (dwarf_read_debug) |
d721ba37 | 13129 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 13130 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 13131 | } |
400174b1 TT |
13132 | |
13133 | const char *name = bfd_get_filename (dbfd.get ()); | |
13134 | std::unique_ptr<struct dwp_file> dwp_file | |
13135 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 13136 | |
80626a55 | 13137 | /* +1: section 0 is unused */ |
192b62ce | 13138 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
13139 | dwp_file->elf_sections = |
13140 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
13141 | dwp_file->num_sections, asection *); | |
13142 | ||
400174b1 TT |
13143 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13144 | dwarf2_locate_common_dwp_sections, | |
13145 | dwp_file.get ()); | |
80626a55 | 13146 | |
400174b1 TT |
13147 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13148 | 0); | |
80626a55 | 13149 | |
400174b1 TT |
13150 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13151 | 1); | |
80626a55 | 13152 | |
73869dc2 | 13153 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
13154 | if (dwp_file->cus && dwp_file->tus |
13155 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
13156 | { |
13157 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 13158 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 13159 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
13160 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
13161 | " TU version %s [in DWP file %s]"), | |
13162 | pulongest (dwp_file->cus->version), | |
d721ba37 | 13163 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 13164 | } |
08302ed2 DE |
13165 | |
13166 | if (dwp_file->cus) | |
13167 | dwp_file->version = dwp_file->cus->version; | |
13168 | else if (dwp_file->tus) | |
13169 | dwp_file->version = dwp_file->tus->version; | |
13170 | else | |
13171 | dwp_file->version = 2; | |
73869dc2 DE |
13172 | |
13173 | if (dwp_file->version == 2) | |
400174b1 TT |
13174 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13175 | dwarf2_locate_v2_dwp_sections, | |
13176 | dwp_file.get ()); | |
73869dc2 | 13177 | |
19ac8c2e DE |
13178 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
13179 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 13180 | |
b4f54984 | 13181 | if (dwarf_read_debug) |
80626a55 DE |
13182 | { |
13183 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
13184 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
13185 | " %s CUs, %s TUs\n", |
13186 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
13187 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
13188 | } |
13189 | ||
13190 | return dwp_file; | |
3019eac3 | 13191 | } |
c906108c | 13192 | |
ab5088bf DE |
13193 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
13194 | ||
13195 | static struct dwp_file * | |
ed2dc618 | 13196 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
13197 | { |
13198 | if (! dwarf2_per_objfile->dwp_checked) | |
13199 | { | |
ed2dc618 SM |
13200 | dwarf2_per_objfile->dwp_file |
13201 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
13202 | dwarf2_per_objfile->dwp_checked = 1; |
13203 | } | |
400174b1 | 13204 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
13205 | } |
13206 | ||
80626a55 DE |
13207 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
13208 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
13209 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 13210 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
13211 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
13212 | ||
13213 | This is called, for example, when wanting to read a variable with a | |
13214 | complex location. Therefore we don't want to do file i/o for every call. | |
13215 | Therefore we don't want to look for a DWO file on every call. | |
13216 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
13217 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
13218 | for a DWO file. | |
13219 | ||
1c658ad5 | 13220 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 13221 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 13222 | |
3019eac3 | 13223 | static struct dwo_unit * |
80626a55 DE |
13224 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
13225 | const char *dwo_name, const char *comp_dir, | |
13226 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 13227 | { |
ed2dc618 | 13228 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 13229 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
13230 | const char *kind = is_debug_types ? "TU" : "CU"; |
13231 | void **dwo_file_slot; | |
3019eac3 | 13232 | struct dwo_file *dwo_file; |
80626a55 | 13233 | struct dwp_file *dwp_file; |
cb1df416 | 13234 | |
6a506a2d DE |
13235 | /* First see if there's a DWP file. |
13236 | If we have a DWP file but didn't find the DWO inside it, don't | |
13237 | look for the original DWO file. It makes gdb behave differently | |
13238 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 13239 | |
ed2dc618 | 13240 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 13241 | if (dwp_file != NULL) |
cf2c3c16 | 13242 | { |
80626a55 DE |
13243 | const struct dwp_hash_table *dwp_htab = |
13244 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
13245 | ||
13246 | if (dwp_htab != NULL) | |
13247 | { | |
13248 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 13249 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 13250 | signature, is_debug_types); |
80626a55 DE |
13251 | |
13252 | if (dwo_cutu != NULL) | |
13253 | { | |
b4f54984 | 13254 | if (dwarf_read_debug) |
80626a55 DE |
13255 | { |
13256 | fprintf_unfiltered (gdb_stdlog, | |
13257 | "Virtual DWO %s %s found: @%s\n", | |
13258 | kind, hex_string (signature), | |
13259 | host_address_to_string (dwo_cutu)); | |
13260 | } | |
13261 | return dwo_cutu; | |
13262 | } | |
13263 | } | |
13264 | } | |
6a506a2d | 13265 | else |
80626a55 | 13266 | { |
6a506a2d | 13267 | /* No DWP file, look for the DWO file. */ |
80626a55 | 13268 | |
ed2dc618 SM |
13269 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
13270 | dwo_name, comp_dir); | |
6a506a2d | 13271 | if (*dwo_file_slot == NULL) |
80626a55 | 13272 | { |
6a506a2d DE |
13273 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
13274 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 13275 | } |
6a506a2d | 13276 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 13277 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 13278 | |
6a506a2d | 13279 | if (dwo_file != NULL) |
19c3d4c9 | 13280 | { |
6a506a2d DE |
13281 | struct dwo_unit *dwo_cutu = NULL; |
13282 | ||
13283 | if (is_debug_types && dwo_file->tus) | |
13284 | { | |
13285 | struct dwo_unit find_dwo_cutu; | |
13286 | ||
13287 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13288 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
13289 | dwo_cutu |
13290 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 13291 | } |
33c5cd75 | 13292 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 13293 | { |
33c5cd75 DB |
13294 | struct dwo_unit find_dwo_cutu; |
13295 | ||
13296 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13297 | find_dwo_cutu.signature = signature; | |
13298 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
13299 | &find_dwo_cutu); | |
6a506a2d DE |
13300 | } |
13301 | ||
13302 | if (dwo_cutu != NULL) | |
13303 | { | |
b4f54984 | 13304 | if (dwarf_read_debug) |
6a506a2d DE |
13305 | { |
13306 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
13307 | kind, dwo_name, hex_string (signature), | |
13308 | host_address_to_string (dwo_cutu)); | |
13309 | } | |
13310 | return dwo_cutu; | |
80626a55 DE |
13311 | } |
13312 | } | |
2e276125 | 13313 | } |
9cdd5dbd | 13314 | |
80626a55 DE |
13315 | /* We didn't find it. This could mean a dwo_id mismatch, or |
13316 | someone deleted the DWO/DWP file, or the search path isn't set up | |
13317 | correctly to find the file. */ | |
13318 | ||
b4f54984 | 13319 | if (dwarf_read_debug) |
80626a55 DE |
13320 | { |
13321 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
13322 | kind, dwo_name, hex_string (signature)); | |
13323 | } | |
3019eac3 | 13324 | |
6656a72d DE |
13325 | /* This is a warning and not a complaint because it can be caused by |
13326 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
13327 | { |
13328 | /* Print the name of the DWP file if we looked there, helps the user | |
13329 | better diagnose the problem. */ | |
791afaa2 | 13330 | std::string dwp_text; |
43942612 DE |
13331 | |
13332 | if (dwp_file != NULL) | |
791afaa2 TT |
13333 | dwp_text = string_printf (" [in DWP file %s]", |
13334 | lbasename (dwp_file->name)); | |
43942612 | 13335 | |
9d8780f0 | 13336 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
13337 | " [in module %s]"), |
13338 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 13339 | dwp_text.c_str (), |
43942612 | 13340 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 13341 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 13342 | } |
3019eac3 | 13343 | return NULL; |
5fb290d7 DJ |
13344 | } |
13345 | ||
80626a55 DE |
13346 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
13347 | See lookup_dwo_cutu_unit for details. */ | |
13348 | ||
13349 | static struct dwo_unit * | |
13350 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
13351 | const char *dwo_name, const char *comp_dir, | |
13352 | ULONGEST signature) | |
13353 | { | |
13354 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
13355 | } | |
13356 | ||
13357 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
13358 | See lookup_dwo_cutu_unit for details. */ | |
13359 | ||
13360 | static struct dwo_unit * | |
13361 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
13362 | const char *dwo_name, const char *comp_dir) | |
13363 | { | |
13364 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
13365 | } | |
13366 | ||
89e63ee4 DE |
13367 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
13368 | ||
13369 | static int | |
13370 | queue_and_load_dwo_tu (void **slot, void *info) | |
13371 | { | |
13372 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
13373 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
13374 | ULONGEST signature = dwo_unit->signature; | |
13375 | struct signatured_type *sig_type = | |
13376 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
13377 | ||
13378 | if (sig_type != NULL) | |
13379 | { | |
13380 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
13381 | ||
13382 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
13383 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
13384 | while processing PER_CU. */ | |
13385 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
13386 | load_full_type_unit (sig_cu); | |
13387 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
13388 | } | |
13389 | ||
13390 | return 1; | |
13391 | } | |
13392 | ||
13393 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
13394 | The DWO may have the only definition of the type, though it may not be | |
13395 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
13396 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
13397 | ||
13398 | static void | |
13399 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
13400 | { | |
13401 | struct dwo_unit *dwo_unit; | |
13402 | struct dwo_file *dwo_file; | |
13403 | ||
13404 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 13405 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
13406 | gdb_assert (per_cu->cu != NULL); |
13407 | ||
13408 | dwo_unit = per_cu->cu->dwo_unit; | |
13409 | gdb_assert (dwo_unit != NULL); | |
13410 | ||
13411 | dwo_file = dwo_unit->dwo_file; | |
13412 | if (dwo_file->tus != NULL) | |
13413 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
13414 | } | |
13415 | ||
3019eac3 | 13416 | /* Free all resources associated with DWO_FILE. |
5dafb3d1 | 13417 | Close the DWO file and munmap the sections. */ |
348e048f DE |
13418 | |
13419 | static void | |
5dafb3d1 | 13420 | free_dwo_file (struct dwo_file *dwo_file) |
348e048f | 13421 | { |
5c6fa7ab | 13422 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 13423 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 13424 | |
3019eac3 DE |
13425 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
13426 | } | |
348e048f | 13427 | |
3019eac3 | 13428 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 13429 | |
3019eac3 DE |
13430 | static int |
13431 | free_dwo_file_from_slot (void **slot, void *info) | |
13432 | { | |
13433 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
348e048f | 13434 | |
5dafb3d1 | 13435 | free_dwo_file (dwo_file); |
348e048f | 13436 | |
3019eac3 DE |
13437 | return 1; |
13438 | } | |
348e048f | 13439 | |
3019eac3 | 13440 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 13441 | |
3019eac3 DE |
13442 | static void |
13443 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
13444 | { | |
13445 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 13446 | } |
3019eac3 DE |
13447 | \f |
13448 | /* Read in various DIEs. */ | |
348e048f | 13449 | |
d389af10 | 13450 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
13451 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
13452 | already referenced by DW_AT_abstract_origin from the children of the | |
13453 | current DIE. */ | |
d389af10 JK |
13454 | |
13455 | static void | |
13456 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
13457 | { | |
13458 | struct die_info *child_die; | |
791afaa2 | 13459 | sect_offset *offsetp; |
d389af10 JK |
13460 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
13461 | struct die_info *origin_die; | |
13462 | /* Iterator of the ORIGIN_DIE children. */ | |
13463 | struct die_info *origin_child_die; | |
d389af10 | 13464 | struct attribute *attr; |
cd02d79d PA |
13465 | struct dwarf2_cu *origin_cu; |
13466 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
13467 | |
13468 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13469 | if (!attr) | |
13470 | return; | |
13471 | ||
cd02d79d PA |
13472 | /* Note that following die references may follow to a die in a |
13473 | different cu. */ | |
13474 | ||
13475 | origin_cu = cu; | |
13476 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
13477 | ||
13478 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
13479 | symbols in. */ | |
13480 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
13481 | origin_cu->list_in_scope = cu->list_in_scope; | |
13482 | ||
edb3359d DJ |
13483 | if (die->tag != origin_die->tag |
13484 | && !(die->tag == DW_TAG_inlined_subroutine | |
13485 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13486 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
13487 | sect_offset_str (die->sect_off), |
13488 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 13489 | |
791afaa2 | 13490 | std::vector<sect_offset> offsets; |
d389af10 | 13491 | |
3ea89b92 PMR |
13492 | for (child_die = die->child; |
13493 | child_die && child_die->tag; | |
13494 | child_die = sibling_die (child_die)) | |
13495 | { | |
13496 | struct die_info *child_origin_die; | |
13497 | struct dwarf2_cu *child_origin_cu; | |
13498 | ||
13499 | /* We are trying to process concrete instance entries: | |
216f72a1 | 13500 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
13501 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
13502 | present in the abstract instance but not referenced in the concrete | |
13503 | one. */ | |
216f72a1 JK |
13504 | if (child_die->tag == DW_TAG_call_site |
13505 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
13506 | continue; |
13507 | ||
c38f313d DJ |
13508 | /* For each CHILD_DIE, find the corresponding child of |
13509 | ORIGIN_DIE. If there is more than one layer of | |
13510 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
13511 | but GCC versions at least through 4.4 generate this (GCC PR | |
13512 | 40573). */ | |
3ea89b92 PMR |
13513 | child_origin_die = child_die; |
13514 | child_origin_cu = cu; | |
c38f313d DJ |
13515 | while (1) |
13516 | { | |
cd02d79d PA |
13517 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
13518 | child_origin_cu); | |
c38f313d DJ |
13519 | if (attr == NULL) |
13520 | break; | |
cd02d79d PA |
13521 | child_origin_die = follow_die_ref (child_origin_die, attr, |
13522 | &child_origin_cu); | |
c38f313d DJ |
13523 | } |
13524 | ||
d389af10 JK |
13525 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
13526 | counterpart may exist. */ | |
c38f313d | 13527 | if (child_origin_die != child_die) |
d389af10 | 13528 | { |
edb3359d DJ |
13529 | if (child_die->tag != child_origin_die->tag |
13530 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
13531 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13532 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13533 | "different tags"), |
9d8780f0 SM |
13534 | sect_offset_str (child_die->sect_off), |
13535 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13536 | if (child_origin_die->parent != origin_die) |
b98664d3 | 13537 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13538 | "different parents"), |
9d8780f0 SM |
13539 | sect_offset_str (child_die->sect_off), |
13540 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13541 | else |
791afaa2 | 13542 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 13543 | } |
d389af10 | 13544 | } |
791afaa2 TT |
13545 | std::sort (offsets.begin (), offsets.end ()); |
13546 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
13547 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 13548 | if (offsetp[-1] == *offsetp) |
b98664d3 | 13549 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
13550 | "to DIE %s as their abstract origin"), |
13551 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 13552 | |
791afaa2 | 13553 | offsetp = offsets.data (); |
d389af10 JK |
13554 | origin_child_die = origin_die->child; |
13555 | while (origin_child_die && origin_child_die->tag) | |
13556 | { | |
13557 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 13558 | while (offsetp < offsets_end |
9c541725 | 13559 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 13560 | offsetp++; |
b64f50a1 | 13561 | if (offsetp >= offsets_end |
9c541725 | 13562 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 13563 | { |
adde2bff DE |
13564 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
13565 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
13566 | This can happen with mutually referenced abstract_origins. | |
13567 | PR 16581. */ | |
13568 | if (!origin_child_die->in_process) | |
13569 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
13570 | } |
13571 | origin_child_die = sibling_die (origin_child_die); | |
13572 | } | |
cd02d79d | 13573 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
13574 | } |
13575 | ||
c906108c | 13576 | static void |
e7c27a73 | 13577 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13578 | { |
518817b3 | 13579 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13580 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13581 | struct context_stack *newobj; |
c906108c SS |
13582 | CORE_ADDR lowpc; |
13583 | CORE_ADDR highpc; | |
13584 | struct die_info *child_die; | |
edb3359d | 13585 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 13586 | const char *name; |
e142c38c | 13587 | CORE_ADDR baseaddr; |
801e3a5b | 13588 | struct block *block; |
edb3359d | 13589 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 13590 | std::vector<struct symbol *> template_args; |
34eaf542 | 13591 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
13592 | |
13593 | if (inlined_func) | |
13594 | { | |
13595 | /* If we do not have call site information, we can't show the | |
13596 | caller of this inlined function. That's too confusing, so | |
13597 | only use the scope for local variables. */ | |
13598 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
13599 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
13600 | if (call_line == NULL || call_file == NULL) | |
13601 | { | |
13602 | read_lexical_block_scope (die, cu); | |
13603 | return; | |
13604 | } | |
13605 | } | |
c906108c | 13606 | |
e142c38c DJ |
13607 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
13608 | ||
94af9270 | 13609 | name = dwarf2_name (die, cu); |
c906108c | 13610 | |
e8d05480 JB |
13611 | /* Ignore functions with missing or empty names. These are actually |
13612 | illegal according to the DWARF standard. */ | |
13613 | if (name == NULL) | |
13614 | { | |
b98664d3 | 13615 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 13616 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
13617 | return; |
13618 | } | |
13619 | ||
13620 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 13621 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 13622 | <= PC_BOUNDS_INVALID) |
e8d05480 | 13623 | { |
ae4d0c03 PM |
13624 | attr = dwarf2_attr (die, DW_AT_external, cu); |
13625 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 13626 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
13627 | "for subprogram DIE at %s"), |
13628 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
13629 | return; |
13630 | } | |
c906108c | 13631 | |
3e29f34a MR |
13632 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13633 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13634 | |
34eaf542 TT |
13635 | /* If we have any template arguments, then we must allocate a |
13636 | different sort of symbol. */ | |
13637 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
13638 | { | |
13639 | if (child_die->tag == DW_TAG_template_type_param | |
13640 | || child_die->tag == DW_TAG_template_value_param) | |
13641 | { | |
e623cf5d | 13642 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 13643 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13644 | break; |
13645 | } | |
13646 | } | |
13647 | ||
804d2729 | 13648 | newobj = cu->builder->push_context (0, lowpc); |
5e2db402 TT |
13649 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13650 | (struct symbol *) templ_func); | |
4c2df51b | 13651 | |
4cecd739 DJ |
13652 | /* If there is a location expression for DW_AT_frame_base, record |
13653 | it. */ | |
e142c38c | 13654 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 13655 | if (attr) |
fe978cb0 | 13656 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13657 | |
63e43d3a PMR |
13658 | /* If there is a location for the static link, record it. */ |
13659 | newobj->static_link = NULL; | |
13660 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
13661 | if (attr) | |
13662 | { | |
224c3ddb SM |
13663 | newobj->static_link |
13664 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
13665 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
13666 | } | |
13667 | ||
804d2729 | 13668 | cu->list_in_scope = cu->builder->get_local_symbols (); |
c906108c | 13669 | |
639d11d3 | 13670 | if (die->child != NULL) |
c906108c | 13671 | { |
639d11d3 | 13672 | child_die = die->child; |
c906108c SS |
13673 | while (child_die && child_die->tag) |
13674 | { | |
34eaf542 TT |
13675 | if (child_die->tag == DW_TAG_template_type_param |
13676 | || child_die->tag == DW_TAG_template_value_param) | |
13677 | { | |
13678 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13679 | ||
f1078f66 | 13680 | if (arg != NULL) |
2f4732b0 | 13681 | template_args.push_back (arg); |
34eaf542 TT |
13682 | } |
13683 | else | |
13684 | process_die (child_die, cu); | |
c906108c SS |
13685 | child_die = sibling_die (child_die); |
13686 | } | |
13687 | } | |
13688 | ||
d389af10 JK |
13689 | inherit_abstract_dies (die, cu); |
13690 | ||
4a811a97 UW |
13691 | /* If we have a DW_AT_specification, we might need to import using |
13692 | directives from the context of the specification DIE. See the | |
13693 | comment in determine_prefix. */ | |
13694 | if (cu->language == language_cplus | |
13695 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13696 | { | |
13697 | struct dwarf2_cu *spec_cu = cu; | |
13698 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13699 | ||
13700 | while (spec_die) | |
13701 | { | |
13702 | child_die = spec_die->child; | |
13703 | while (child_die && child_die->tag) | |
13704 | { | |
13705 | if (child_die->tag == DW_TAG_imported_module) | |
13706 | process_die (child_die, spec_cu); | |
13707 | child_die = sibling_die (child_die); | |
13708 | } | |
13709 | ||
13710 | /* In some cases, GCC generates specification DIEs that | |
13711 | themselves contain DW_AT_specification attributes. */ | |
13712 | spec_die = die_specification (spec_die, &spec_cu); | |
13713 | } | |
13714 | } | |
13715 | ||
804d2729 | 13716 | struct context_stack cstk = cu->builder->pop_context (); |
c906108c | 13717 | /* Make a block for the local symbols within. */ |
804d2729 TT |
13718 | block = cu->builder->finish_block (cstk.name, cstk.old_blocks, |
13719 | cstk.static_link, lowpc, highpc); | |
801e3a5b | 13720 | |
df8a16a1 | 13721 | /* For C++, set the block's scope. */ |
45280282 IB |
13722 | if ((cu->language == language_cplus |
13723 | || cu->language == language_fortran | |
c44af4eb TT |
13724 | || cu->language == language_d |
13725 | || cu->language == language_rust) | |
4d4ec4e5 | 13726 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13727 | block_set_scope (block, determine_prefix (die, cu), |
13728 | &objfile->objfile_obstack); | |
df8a16a1 | 13729 | |
801e3a5b JB |
13730 | /* If we have address ranges, record them. */ |
13731 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13732 | |
a60f3166 | 13733 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13734 | |
34eaf542 | 13735 | /* Attach template arguments to function. */ |
2f4732b0 | 13736 | if (!template_args.empty ()) |
34eaf542 TT |
13737 | { |
13738 | gdb_assert (templ_func != NULL); | |
13739 | ||
2f4732b0 | 13740 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13741 | templ_func->template_arguments |
8d749320 SM |
13742 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13743 | templ_func->n_template_arguments); | |
34eaf542 | 13744 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13745 | template_args.data (), |
34eaf542 | 13746 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
13747 | } |
13748 | ||
208d8187 JB |
13749 | /* In C++, we can have functions nested inside functions (e.g., when |
13750 | a function declares a class that has methods). This means that | |
13751 | when we finish processing a function scope, we may need to go | |
13752 | back to building a containing block's symbol lists. */ | |
804d2729 TT |
13753 | *cu->builder->get_local_symbols () = cstk.locals; |
13754 | cu->builder->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13755 | |
921e78cf JB |
13756 | /* If we've finished processing a top-level function, subsequent |
13757 | symbols go in the file symbol list. */ | |
804d2729 TT |
13758 | if (cu->builder->outermost_context_p ()) |
13759 | cu->list_in_scope = cu->builder->get_file_symbols (); | |
c906108c SS |
13760 | } |
13761 | ||
13762 | /* Process all the DIES contained within a lexical block scope. Start | |
13763 | a new scope, process the dies, and then close the scope. */ | |
13764 | ||
13765 | static void | |
e7c27a73 | 13766 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13767 | { |
518817b3 | 13768 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13769 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13770 | CORE_ADDR lowpc, highpc; |
13771 | struct die_info *child_die; | |
e142c38c DJ |
13772 | CORE_ADDR baseaddr; |
13773 | ||
13774 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
13775 | |
13776 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13777 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13778 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13779 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13780 | describe ranges. */ |
e385593e JK |
13781 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13782 | { | |
13783 | case PC_BOUNDS_NOT_PRESENT: | |
13784 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13785 | there was no wrapping by that DW_TAG_lexical_block. | |
13786 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13787 | for (child_die = die->child; | |
13788 | child_die != NULL && child_die->tag; | |
13789 | child_die = sibling_die (child_die)) | |
13790 | process_die (child_die, cu); | |
13791 | return; | |
13792 | case PC_BOUNDS_INVALID: | |
13793 | return; | |
13794 | } | |
3e29f34a MR |
13795 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13796 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13797 | |
804d2729 | 13798 | cu->builder->push_context (0, lowpc); |
639d11d3 | 13799 | if (die->child != NULL) |
c906108c | 13800 | { |
639d11d3 | 13801 | child_die = die->child; |
c906108c SS |
13802 | while (child_die && child_die->tag) |
13803 | { | |
e7c27a73 | 13804 | process_die (child_die, cu); |
c906108c SS |
13805 | child_die = sibling_die (child_die); |
13806 | } | |
13807 | } | |
3ea89b92 | 13808 | inherit_abstract_dies (die, cu); |
804d2729 | 13809 | struct context_stack cstk = cu->builder->pop_context (); |
c906108c | 13810 | |
804d2729 TT |
13811 | if (*cu->builder->get_local_symbols () != NULL |
13812 | || (*cu->builder->get_local_using_directives ()) != NULL) | |
c906108c | 13813 | { |
801e3a5b | 13814 | struct block *block |
804d2729 TT |
13815 | = cu->builder->finish_block (0, cstk.old_blocks, NULL, |
13816 | cstk.start_addr, highpc); | |
801e3a5b JB |
13817 | |
13818 | /* Note that recording ranges after traversing children, as we | |
13819 | do here, means that recording a parent's ranges entails | |
13820 | walking across all its children's ranges as they appear in | |
13821 | the address map, which is quadratic behavior. | |
13822 | ||
13823 | It would be nicer to record the parent's ranges before | |
13824 | traversing its children, simply overriding whatever you find | |
13825 | there. But since we don't even decide whether to create a | |
13826 | block until after we've traversed its children, that's hard | |
13827 | to do. */ | |
13828 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13829 | } |
804d2729 TT |
13830 | *cu->builder->get_local_symbols () = cstk.locals; |
13831 | cu->builder->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13832 | } |
13833 | ||
216f72a1 | 13834 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13835 | |
13836 | static void | |
13837 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13838 | { | |
518817b3 | 13839 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13840 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13841 | CORE_ADDR pc, baseaddr; | |
13842 | struct attribute *attr; | |
13843 | struct call_site *call_site, call_site_local; | |
13844 | void **slot; | |
13845 | int nparams; | |
13846 | struct die_info *child_die; | |
13847 | ||
13848 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13849 | ||
216f72a1 JK |
13850 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13851 | if (attr == NULL) | |
13852 | { | |
13853 | /* This was a pre-DWARF-5 GNU extension alias | |
13854 | for DW_AT_call_return_pc. */ | |
13855 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13856 | } | |
96408a79 SA |
13857 | if (!attr) |
13858 | { | |
b98664d3 | 13859 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13860 | "DIE %s [in module %s]"), |
13861 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13862 | return; |
13863 | } | |
31aa7e4e | 13864 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 13865 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13866 | |
13867 | if (cu->call_site_htab == NULL) | |
13868 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13869 | NULL, &objfile->objfile_obstack, | |
13870 | hashtab_obstack_allocate, NULL); | |
13871 | call_site_local.pc = pc; | |
13872 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13873 | if (*slot != NULL) | |
13874 | { | |
b98664d3 | 13875 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13876 | "DIE %s [in module %s]"), |
13877 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13878 | objfile_name (objfile)); |
96408a79 SA |
13879 | return; |
13880 | } | |
13881 | ||
13882 | /* Count parameters at the caller. */ | |
13883 | ||
13884 | nparams = 0; | |
13885 | for (child_die = die->child; child_die && child_die->tag; | |
13886 | child_die = sibling_die (child_die)) | |
13887 | { | |
216f72a1 JK |
13888 | if (child_die->tag != DW_TAG_call_site_parameter |
13889 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13890 | { |
b98664d3 | 13891 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13892 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13893 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13894 | objfile_name (objfile)); |
96408a79 SA |
13895 | continue; |
13896 | } | |
13897 | ||
13898 | nparams++; | |
13899 | } | |
13900 | ||
224c3ddb SM |
13901 | call_site |
13902 | = ((struct call_site *) | |
13903 | obstack_alloc (&objfile->objfile_obstack, | |
13904 | sizeof (*call_site) | |
13905 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13906 | *slot = call_site; |
13907 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13908 | call_site->pc = pc; | |
13909 | ||
216f72a1 JK |
13910 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13911 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13912 | { |
13913 | struct die_info *func_die; | |
13914 | ||
13915 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13916 | for (func_die = die->parent; | |
13917 | func_die && func_die->tag != DW_TAG_subprogram | |
13918 | && func_die->tag != DW_TAG_subroutine_type; | |
13919 | func_die = func_die->parent); | |
13920 | ||
216f72a1 JK |
13921 | /* DW_AT_call_all_calls is a superset |
13922 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13923 | if (func_die |
216f72a1 | 13924 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13925 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13926 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13927 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13928 | { | |
13929 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13930 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13931 | both the initial caller containing the real return address PC and | |
13932 | the final callee containing the current PC of a chain of tail | |
13933 | calls do not need to have the tail call list complete. But any | |
13934 | function candidate for a virtual tail call frame searched via | |
13935 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13936 | determined unambiguously. */ | |
13937 | } | |
13938 | else | |
13939 | { | |
13940 | struct type *func_type = NULL; | |
13941 | ||
13942 | if (func_die) | |
13943 | func_type = get_die_type (func_die, cu); | |
13944 | if (func_type != NULL) | |
13945 | { | |
13946 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
13947 | ||
13948 | /* Enlist this call site to the function. */ | |
13949 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13950 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13951 | } | |
13952 | else | |
b98664d3 | 13953 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13954 | "DIE %s [in module %s]"), |
13955 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13956 | } |
13957 | } | |
13958 | ||
216f72a1 JK |
13959 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13960 | if (attr == NULL) | |
13961 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13962 | if (attr == NULL) | |
13963 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13964 | if (attr == NULL) |
216f72a1 JK |
13965 | { |
13966 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13967 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13968 | } | |
96408a79 SA |
13969 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
13970 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
13971 | /* Keep NULL DWARF_BLOCK. */; | |
13972 | else if (attr_form_is_block (attr)) | |
13973 | { | |
13974 | struct dwarf2_locexpr_baton *dlbaton; | |
13975 | ||
8d749320 | 13976 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
13977 | dlbaton->data = DW_BLOCK (attr)->data; |
13978 | dlbaton->size = DW_BLOCK (attr)->size; | |
13979 | dlbaton->per_cu = cu->per_cu; | |
13980 | ||
13981 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13982 | } | |
7771576e | 13983 | else if (attr_form_is_ref (attr)) |
96408a79 | 13984 | { |
96408a79 SA |
13985 | struct dwarf2_cu *target_cu = cu; |
13986 | struct die_info *target_die; | |
13987 | ||
ac9ec31b | 13988 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 13989 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
13990 | if (die_is_declaration (target_die, target_cu)) |
13991 | { | |
7d45c7c3 | 13992 | const char *target_physname; |
9112db09 JK |
13993 | |
13994 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13995 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13996 | if (target_physname == NULL) |
9112db09 | 13997 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13998 | if (target_physname == NULL) |
b98664d3 | 13999 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14000 | "physname, for referencing DIE %s [in module %s]"), |
14001 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14002 | else |
7d455152 | 14003 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
14004 | } |
14005 | else | |
14006 | { | |
14007 | CORE_ADDR lowpc; | |
14008 | ||
14009 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 14010 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 14011 | <= PC_BOUNDS_INVALID) |
b98664d3 | 14012 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14013 | "low pc, for referencing DIE %s [in module %s]"), |
14014 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14015 | else |
3e29f34a MR |
14016 | { |
14017 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
14018 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
14019 | } | |
96408a79 SA |
14020 | } |
14021 | } | |
14022 | else | |
b98664d3 | 14023 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
14024 | "block nor reference, for DIE %s [in module %s]"), |
14025 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14026 | |
14027 | call_site->per_cu = cu->per_cu; | |
14028 | ||
14029 | for (child_die = die->child; | |
14030 | child_die && child_die->tag; | |
14031 | child_die = sibling_die (child_die)) | |
14032 | { | |
96408a79 | 14033 | struct call_site_parameter *parameter; |
1788b2d3 | 14034 | struct attribute *loc, *origin; |
96408a79 | 14035 | |
216f72a1 JK |
14036 | if (child_die->tag != DW_TAG_call_site_parameter |
14037 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
14038 | { |
14039 | /* Already printed the complaint above. */ | |
14040 | continue; | |
14041 | } | |
14042 | ||
14043 | gdb_assert (call_site->parameter_count < nparams); | |
14044 | parameter = &call_site->parameter[call_site->parameter_count]; | |
14045 | ||
1788b2d3 JK |
14046 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
14047 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 14048 | register is contained in DW_AT_call_value. */ |
96408a79 | 14049 | |
24c5c679 | 14050 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
14051 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
14052 | if (origin == NULL) | |
14053 | { | |
14054 | /* This was a pre-DWARF-5 GNU extension alias | |
14055 | for DW_AT_call_parameter. */ | |
14056 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
14057 | } | |
7771576e | 14058 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 14059 | { |
1788b2d3 | 14060 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
14061 | |
14062 | sect_offset sect_off | |
14063 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
14064 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
14065 | { |
14066 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
14067 | binding can be done only inside one CU. Such referenced DIE | |
14068 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 14069 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
14070 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14071 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14072 | objfile_name (objfile)); |
d76b7dbc JK |
14073 | continue; |
14074 | } | |
9c541725 PA |
14075 | parameter->u.param_cu_off |
14076 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
14077 | } |
14078 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 | 14079 | { |
b98664d3 | 14080 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
14081 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14082 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14083 | continue; |
14084 | } | |
24c5c679 | 14085 | else |
96408a79 | 14086 | { |
24c5c679 JK |
14087 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
14088 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
14089 | if (parameter->u.dwarf_reg != -1) | |
14090 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
14091 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
14092 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
14093 | ¶meter->u.fb_offset)) | |
14094 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
14095 | else | |
14096 | { | |
b98664d3 | 14097 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 14098 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 14099 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 14100 | "[in module %s]"), |
9d8780f0 | 14101 | sect_offset_str (child_die->sect_off), |
9c541725 | 14102 | objfile_name (objfile)); |
24c5c679 JK |
14103 | continue; |
14104 | } | |
96408a79 SA |
14105 | } |
14106 | ||
216f72a1 JK |
14107 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
14108 | if (attr == NULL) | |
14109 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
14110 | if (!attr_form_is_block (attr)) |
14111 | { | |
b98664d3 | 14112 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
14113 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14114 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14115 | objfile_name (objfile)); |
96408a79 SA |
14116 | continue; |
14117 | } | |
14118 | parameter->value = DW_BLOCK (attr)->data; | |
14119 | parameter->value_size = DW_BLOCK (attr)->size; | |
14120 | ||
14121 | /* Parameters are not pre-cleared by memset above. */ | |
14122 | parameter->data_value = NULL; | |
14123 | parameter->data_value_size = 0; | |
14124 | call_site->parameter_count++; | |
14125 | ||
216f72a1 JK |
14126 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
14127 | if (attr == NULL) | |
14128 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
14129 | if (attr) |
14130 | { | |
14131 | if (!attr_form_is_block (attr)) | |
b98664d3 | 14132 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
14133 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14134 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14135 | objfile_name (objfile)); |
96408a79 SA |
14136 | else |
14137 | { | |
14138 | parameter->data_value = DW_BLOCK (attr)->data; | |
14139 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
14140 | } | |
14141 | } | |
14142 | } | |
14143 | } | |
14144 | ||
71a3c369 TT |
14145 | /* Helper function for read_variable. If DIE represents a virtual |
14146 | table, then return the type of the concrete object that is | |
14147 | associated with the virtual table. Otherwise, return NULL. */ | |
14148 | ||
14149 | static struct type * | |
14150 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
14151 | { | |
14152 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
14153 | if (attr == NULL) | |
14154 | return NULL; | |
14155 | ||
14156 | /* Find the type DIE. */ | |
14157 | struct die_info *type_die = NULL; | |
14158 | struct dwarf2_cu *type_cu = cu; | |
14159 | ||
14160 | if (attr_form_is_ref (attr)) | |
14161 | type_die = follow_die_ref (die, attr, &type_cu); | |
14162 | if (type_die == NULL) | |
14163 | return NULL; | |
14164 | ||
14165 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
14166 | return NULL; | |
14167 | return die_containing_type (type_die, type_cu); | |
14168 | } | |
14169 | ||
14170 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
14171 | ||
14172 | static void | |
14173 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
14174 | { | |
14175 | struct rust_vtable_symbol *storage = NULL; | |
14176 | ||
14177 | if (cu->language == language_rust) | |
14178 | { | |
14179 | struct type *containing_type = rust_containing_type (die, cu); | |
14180 | ||
14181 | if (containing_type != NULL) | |
14182 | { | |
518817b3 | 14183 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 TT |
14184 | |
14185 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
14186 | struct rust_vtable_symbol); | |
14187 | initialize_objfile_symbol (storage); | |
14188 | storage->concrete_type = containing_type; | |
cf724bc9 | 14189 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
14190 | } |
14191 | } | |
14192 | ||
5e2db402 | 14193 | new_symbol (die, NULL, cu, storage); |
71a3c369 TT |
14194 | } |
14195 | ||
43988095 JK |
14196 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
14197 | reading .debug_rnglists. | |
14198 | Callback's type should be: | |
14199 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14200 | Return true if the attributes are present and valid, otherwise, | |
14201 | return false. */ | |
14202 | ||
14203 | template <typename Callback> | |
14204 | static bool | |
14205 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
14206 | Callback &&callback) | |
14207 | { | |
ed2dc618 | 14208 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14209 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14210 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 14211 | bfd *obfd = objfile->obfd; |
43988095 JK |
14212 | /* Base address selection entry. */ |
14213 | CORE_ADDR base; | |
14214 | int found_base; | |
43988095 | 14215 | const gdb_byte *buffer; |
43988095 JK |
14216 | CORE_ADDR baseaddr; |
14217 | bool overflow = false; | |
14218 | ||
14219 | found_base = cu->base_known; | |
14220 | base = cu->base_address; | |
14221 | ||
14222 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
14223 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
14224 | { | |
b98664d3 | 14225 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
14226 | offset); |
14227 | return false; | |
14228 | } | |
14229 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
14230 | ||
14231 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
14232 | ||
14233 | while (1) | |
14234 | { | |
7814882a JK |
14235 | /* Initialize it due to a false compiler warning. */ |
14236 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
14237 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
14238 | + dwarf2_per_objfile->rnglists.size); | |
14239 | unsigned int bytes_read; | |
14240 | ||
14241 | if (buffer == buf_end) | |
14242 | { | |
14243 | overflow = true; | |
14244 | break; | |
14245 | } | |
14246 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
14247 | switch (rlet) | |
14248 | { | |
14249 | case DW_RLE_end_of_list: | |
14250 | break; | |
14251 | case DW_RLE_base_address: | |
14252 | if (buffer + cu->header.addr_size > buf_end) | |
14253 | { | |
14254 | overflow = true; | |
14255 | break; | |
14256 | } | |
14257 | base = read_address (obfd, buffer, cu, &bytes_read); | |
14258 | found_base = 1; | |
14259 | buffer += bytes_read; | |
14260 | break; | |
14261 | case DW_RLE_start_length: | |
14262 | if (buffer + cu->header.addr_size > buf_end) | |
14263 | { | |
14264 | overflow = true; | |
14265 | break; | |
14266 | } | |
14267 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14268 | buffer += bytes_read; | |
14269 | range_end = (range_beginning | |
14270 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
14271 | buffer += bytes_read; | |
14272 | if (buffer > buf_end) | |
14273 | { | |
14274 | overflow = true; | |
14275 | break; | |
14276 | } | |
14277 | break; | |
14278 | case DW_RLE_offset_pair: | |
14279 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14280 | buffer += bytes_read; | |
14281 | if (buffer > buf_end) | |
14282 | { | |
14283 | overflow = true; | |
14284 | break; | |
14285 | } | |
14286 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14287 | buffer += bytes_read; | |
14288 | if (buffer > buf_end) | |
14289 | { | |
14290 | overflow = true; | |
14291 | break; | |
14292 | } | |
14293 | break; | |
14294 | case DW_RLE_start_end: | |
14295 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
14296 | { | |
14297 | overflow = true; | |
14298 | break; | |
14299 | } | |
14300 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14301 | buffer += bytes_read; | |
14302 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
14303 | buffer += bytes_read; | |
14304 | break; | |
14305 | default: | |
b98664d3 | 14306 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14307 | return false; |
14308 | } | |
14309 | if (rlet == DW_RLE_end_of_list || overflow) | |
14310 | break; | |
14311 | if (rlet == DW_RLE_base_address) | |
14312 | continue; | |
14313 | ||
14314 | if (!found_base) | |
14315 | { | |
14316 | /* We have no valid base address for the ranges | |
14317 | data. */ | |
b98664d3 | 14318 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14319 | return false; |
14320 | } | |
14321 | ||
14322 | if (range_beginning > range_end) | |
14323 | { | |
14324 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14325 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
14326 | return false; |
14327 | } | |
14328 | ||
14329 | /* Empty range entries have no effect. */ | |
14330 | if (range_beginning == range_end) | |
14331 | continue; | |
14332 | ||
14333 | range_beginning += base; | |
14334 | range_end += base; | |
14335 | ||
14336 | /* A not-uncommon case of bad debug info. | |
14337 | Don't pollute the addrmap with bad data. */ | |
14338 | if (range_beginning + baseaddr == 0 | |
14339 | && !dwarf2_per_objfile->has_section_at_zero) | |
14340 | { | |
b98664d3 | 14341 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
14342 | " [in module %s]"), objfile_name (objfile)); |
14343 | continue; | |
14344 | } | |
14345 | ||
14346 | callback (range_beginning, range_end); | |
14347 | } | |
14348 | ||
14349 | if (overflow) | |
14350 | { | |
b98664d3 | 14351 | complaint (_("Offset %d is not terminated " |
43988095 JK |
14352 | "for DW_AT_ranges attribute"), |
14353 | offset); | |
14354 | return false; | |
14355 | } | |
14356 | ||
14357 | return true; | |
14358 | } | |
14359 | ||
14360 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
14361 | Callback's type should be: | |
14362 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 14363 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 14364 | |
43988095 | 14365 | template <typename Callback> |
43039443 | 14366 | static int |
5f46c5a5 | 14367 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 14368 | Callback &&callback) |
43039443 | 14369 | { |
ed2dc618 | 14370 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14371 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14372 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
14373 | struct comp_unit_head *cu_header = &cu->header; |
14374 | bfd *obfd = objfile->obfd; | |
14375 | unsigned int addr_size = cu_header->addr_size; | |
14376 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14377 | /* Base address selection entry. */ | |
14378 | CORE_ADDR base; | |
14379 | int found_base; | |
14380 | unsigned int dummy; | |
d521ce57 | 14381 | const gdb_byte *buffer; |
ff013f42 | 14382 | CORE_ADDR baseaddr; |
43039443 | 14383 | |
43988095 JK |
14384 | if (cu_header->version >= 5) |
14385 | return dwarf2_rnglists_process (offset, cu, callback); | |
14386 | ||
d00adf39 DE |
14387 | found_base = cu->base_known; |
14388 | base = cu->base_address; | |
43039443 | 14389 | |
be391dca | 14390 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 14391 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 14392 | { |
b98664d3 | 14393 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
14394 | offset); |
14395 | return 0; | |
14396 | } | |
dce234bc | 14397 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 14398 | |
e7030f15 | 14399 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 14400 | |
43039443 JK |
14401 | while (1) |
14402 | { | |
14403 | CORE_ADDR range_beginning, range_end; | |
14404 | ||
14405 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
14406 | buffer += addr_size; | |
14407 | range_end = read_address (obfd, buffer, cu, &dummy); | |
14408 | buffer += addr_size; | |
14409 | offset += 2 * addr_size; | |
14410 | ||
14411 | /* An end of list marker is a pair of zero addresses. */ | |
14412 | if (range_beginning == 0 && range_end == 0) | |
14413 | /* Found the end of list entry. */ | |
14414 | break; | |
14415 | ||
14416 | /* Each base address selection entry is a pair of 2 values. | |
14417 | The first is the largest possible address, the second is | |
14418 | the base address. Check for a base address here. */ | |
14419 | if ((range_beginning & mask) == mask) | |
14420 | { | |
28d2bfb9 AB |
14421 | /* If we found the largest possible address, then we already |
14422 | have the base address in range_end. */ | |
14423 | base = range_end; | |
43039443 JK |
14424 | found_base = 1; |
14425 | continue; | |
14426 | } | |
14427 | ||
14428 | if (!found_base) | |
14429 | { | |
14430 | /* We have no valid base address for the ranges | |
14431 | data. */ | |
b98664d3 | 14432 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
14433 | return 0; |
14434 | } | |
14435 | ||
9277c30c UW |
14436 | if (range_beginning > range_end) |
14437 | { | |
14438 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14439 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
14440 | return 0; |
14441 | } | |
14442 | ||
14443 | /* Empty range entries have no effect. */ | |
14444 | if (range_beginning == range_end) | |
14445 | continue; | |
14446 | ||
43039443 JK |
14447 | range_beginning += base; |
14448 | range_end += base; | |
14449 | ||
01093045 DE |
14450 | /* A not-uncommon case of bad debug info. |
14451 | Don't pollute the addrmap with bad data. */ | |
14452 | if (range_beginning + baseaddr == 0 | |
14453 | && !dwarf2_per_objfile->has_section_at_zero) | |
14454 | { | |
b98664d3 | 14455 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 14456 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
14457 | continue; |
14458 | } | |
14459 | ||
5f46c5a5 JK |
14460 | callback (range_beginning, range_end); |
14461 | } | |
14462 | ||
14463 | return 1; | |
14464 | } | |
14465 | ||
14466 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
14467 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
14468 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
14469 | ||
14470 | static int | |
14471 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
14472 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
14473 | struct partial_symtab *ranges_pst) | |
14474 | { | |
518817b3 | 14475 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 JK |
14476 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
14477 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
14478 | SECT_OFF_TEXT (objfile)); | |
14479 | int low_set = 0; | |
14480 | CORE_ADDR low = 0; | |
14481 | CORE_ADDR high = 0; | |
14482 | int retval; | |
14483 | ||
14484 | retval = dwarf2_ranges_process (offset, cu, | |
14485 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14486 | { | |
9277c30c | 14487 | if (ranges_pst != NULL) |
3e29f34a MR |
14488 | { |
14489 | CORE_ADDR lowpc; | |
14490 | CORE_ADDR highpc; | |
14491 | ||
14492 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
14493 | range_beginning + baseaddr); | |
14494 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
14495 | range_end + baseaddr); | |
14496 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
14497 | ranges_pst); | |
14498 | } | |
ff013f42 | 14499 | |
43039443 JK |
14500 | /* FIXME: This is recording everything as a low-high |
14501 | segment of consecutive addresses. We should have a | |
14502 | data structure for discontiguous block ranges | |
14503 | instead. */ | |
14504 | if (! low_set) | |
14505 | { | |
14506 | low = range_beginning; | |
14507 | high = range_end; | |
14508 | low_set = 1; | |
14509 | } | |
14510 | else | |
14511 | { | |
14512 | if (range_beginning < low) | |
14513 | low = range_beginning; | |
14514 | if (range_end > high) | |
14515 | high = range_end; | |
14516 | } | |
5f46c5a5 JK |
14517 | }); |
14518 | if (!retval) | |
14519 | return 0; | |
43039443 JK |
14520 | |
14521 | if (! low_set) | |
14522 | /* If the first entry is an end-of-list marker, the range | |
14523 | describes an empty scope, i.e. no instructions. */ | |
14524 | return 0; | |
14525 | ||
14526 | if (low_return) | |
14527 | *low_return = low; | |
14528 | if (high_return) | |
14529 | *high_return = high; | |
14530 | return 1; | |
14531 | } | |
14532 | ||
3a2b436a JK |
14533 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
14534 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 14535 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 14536 | |
3a2b436a | 14537 | static enum pc_bounds_kind |
af34e669 | 14538 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
14539 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
14540 | struct partial_symtab *pst) | |
c906108c | 14541 | { |
518817b3 SM |
14542 | struct dwarf2_per_objfile *dwarf2_per_objfile |
14543 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 14544 | struct attribute *attr; |
91da1414 | 14545 | struct attribute *attr_high; |
af34e669 DJ |
14546 | CORE_ADDR low = 0; |
14547 | CORE_ADDR high = 0; | |
e385593e | 14548 | enum pc_bounds_kind ret; |
c906108c | 14549 | |
91da1414 MW |
14550 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14551 | if (attr_high) | |
af34e669 | 14552 | { |
e142c38c | 14553 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 14554 | if (attr) |
91da1414 | 14555 | { |
31aa7e4e JB |
14556 | low = attr_value_as_address (attr); |
14557 | high = attr_value_as_address (attr_high); | |
14558 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14559 | high += low; | |
91da1414 | 14560 | } |
af34e669 DJ |
14561 | else |
14562 | /* Found high w/o low attribute. */ | |
e385593e | 14563 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14564 | |
14565 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14566 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14567 | } |
c906108c | 14568 | else |
af34e669 | 14569 | { |
e142c38c | 14570 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
14571 | if (attr != NULL) |
14572 | { | |
ab435259 DE |
14573 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14574 | We take advantage of the fact that DW_AT_ranges does not appear | |
14575 | in DW_TAG_compile_unit of DWO files. */ | |
14576 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
14577 | unsigned int ranges_offset = (DW_UNSND (attr) | |
14578 | + (need_ranges_base | |
14579 | ? cu->ranges_base | |
14580 | : 0)); | |
2e3cf129 | 14581 | |
af34e669 | 14582 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14583 | .debug_ranges section. */ |
2e3cf129 | 14584 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 14585 | return PC_BOUNDS_INVALID; |
43039443 | 14586 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14587 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14588 | } |
e385593e JK |
14589 | else |
14590 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14591 | } |
c906108c | 14592 | |
48fbe735 | 14593 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14594 | if (high <= low) |
e385593e | 14595 | return PC_BOUNDS_INVALID; |
c906108c SS |
14596 | |
14597 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14598 | eliminate duplicate copies of functions and vtables and such. | |
14599 | The linker will arbitrarily choose one and discard the others. | |
14600 | The AT_*_pc values for such functions refer to local labels in | |
14601 | these sections. If the section from that file was discarded, the | |
14602 | labels are not in the output, so the relocs get a value of 0. | |
14603 | If this is a discarded function, mark the pc bounds as invalid, | |
14604 | so that GDB will ignore it. */ | |
72dca2f5 | 14605 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 14606 | return PC_BOUNDS_INVALID; |
c906108c SS |
14607 | |
14608 | *lowpc = low; | |
96408a79 SA |
14609 | if (highpc) |
14610 | *highpc = high; | |
af34e669 | 14611 | return ret; |
c906108c SS |
14612 | } |
14613 | ||
b084d499 JB |
14614 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14615 | its low and high PC addresses. Do nothing if these addresses could not | |
14616 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14617 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14618 | ||
14619 | static void | |
14620 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
14621 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14622 | struct dwarf2_cu *cu) | |
14623 | { | |
14624 | CORE_ADDR low, high; | |
14625 | struct die_info *child = die->child; | |
14626 | ||
e385593e | 14627 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14628 | { |
325fac50 PA |
14629 | *lowpc = std::min (*lowpc, low); |
14630 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14631 | } |
14632 | ||
14633 | /* If the language does not allow nested subprograms (either inside | |
14634 | subprograms or lexical blocks), we're done. */ | |
14635 | if (cu->language != language_ada) | |
14636 | return; | |
6e70227d | 14637 | |
b084d499 JB |
14638 | /* Check all the children of the given DIE. If it contains nested |
14639 | subprograms, then check their pc bounds. Likewise, we need to | |
14640 | check lexical blocks as well, as they may also contain subprogram | |
14641 | definitions. */ | |
14642 | while (child && child->tag) | |
14643 | { | |
14644 | if (child->tag == DW_TAG_subprogram | |
14645 | || child->tag == DW_TAG_lexical_block) | |
14646 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
14647 | child = sibling_die (child); | |
14648 | } | |
14649 | } | |
14650 | ||
fae299cd DC |
14651 | /* Get the low and high pc's represented by the scope DIE, and store |
14652 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14653 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14654 | ||
14655 | static void | |
14656 | get_scope_pc_bounds (struct die_info *die, | |
14657 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14658 | struct dwarf2_cu *cu) | |
14659 | { | |
14660 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14661 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14662 | CORE_ADDR current_low, current_high; | |
14663 | ||
3a2b436a | 14664 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14665 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14666 | { |
14667 | best_low = current_low; | |
14668 | best_high = current_high; | |
14669 | } | |
14670 | else | |
14671 | { | |
14672 | struct die_info *child = die->child; | |
14673 | ||
14674 | while (child && child->tag) | |
14675 | { | |
14676 | switch (child->tag) { | |
14677 | case DW_TAG_subprogram: | |
b084d499 | 14678 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14679 | break; |
14680 | case DW_TAG_namespace: | |
f55ee35c | 14681 | case DW_TAG_module: |
fae299cd DC |
14682 | /* FIXME: carlton/2004-01-16: Should we do this for |
14683 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14684 | that current GCC's always emit the DIEs corresponding | |
14685 | to definitions of methods of classes as children of a | |
14686 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14687 | the DIEs giving the declarations, which could be | |
14688 | anywhere). But I don't see any reason why the | |
14689 | standards says that they have to be there. */ | |
14690 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14691 | ||
14692 | if (current_low != ((CORE_ADDR) -1)) | |
14693 | { | |
325fac50 PA |
14694 | best_low = std::min (best_low, current_low); |
14695 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14696 | } |
14697 | break; | |
14698 | default: | |
0963b4bd | 14699 | /* Ignore. */ |
fae299cd DC |
14700 | break; |
14701 | } | |
14702 | ||
14703 | child = sibling_die (child); | |
14704 | } | |
14705 | } | |
14706 | ||
14707 | *lowpc = best_low; | |
14708 | *highpc = best_high; | |
14709 | } | |
14710 | ||
801e3a5b JB |
14711 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14712 | in DIE. */ | |
380bca97 | 14713 | |
801e3a5b JB |
14714 | static void |
14715 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14716 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14717 | { | |
518817b3 | 14718 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14719 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14720 | struct attribute *attr; |
91da1414 | 14721 | struct attribute *attr_high; |
801e3a5b | 14722 | |
91da1414 MW |
14723 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14724 | if (attr_high) | |
801e3a5b | 14725 | { |
801e3a5b JB |
14726 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
14727 | if (attr) | |
14728 | { | |
31aa7e4e JB |
14729 | CORE_ADDR low = attr_value_as_address (attr); |
14730 | CORE_ADDR high = attr_value_as_address (attr_high); | |
14731 | ||
14732 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14733 | high += low; | |
9a619af0 | 14734 | |
3e29f34a MR |
14735 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14736 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
804d2729 | 14737 | cu->builder->record_block_range (block, low, high - 1); |
801e3a5b JB |
14738 | } |
14739 | } | |
14740 | ||
14741 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
14742 | if (attr) | |
14743 | { | |
ab435259 DE |
14744 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14745 | We take advantage of the fact that DW_AT_ranges does not appear | |
14746 | in DW_TAG_compile_unit of DWO files. */ | |
14747 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14748 | |
14749 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14750 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14751 | unsigned long offset = (DW_UNSND (attr) |
14752 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14753 | |
5f46c5a5 JK |
14754 | dwarf2_ranges_process (offset, cu, |
14755 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14756 | { | |
58fdfd2c JK |
14757 | start += baseaddr; |
14758 | end += baseaddr; | |
5f46c5a5 JK |
14759 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14760 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
804d2729 | 14761 | cu->builder->record_block_range (block, start, end - 1); |
5f46c5a5 | 14762 | }); |
801e3a5b JB |
14763 | } |
14764 | } | |
14765 | ||
685b1105 JK |
14766 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14767 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14768 | |
685b1105 JK |
14769 | static void |
14770 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14771 | { |
38360086 | 14772 | int major, minor; |
60d5a603 JK |
14773 | |
14774 | if (cu->producer == NULL) | |
14775 | { | |
14776 | /* For unknown compilers expect their behavior is DWARF version | |
14777 | compliant. | |
14778 | ||
14779 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14780 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14781 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14782 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14783 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14784 | } |
b1ffba5a | 14785 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14786 | { |
38360086 MW |
14787 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14788 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14789 | } |
5230b05a WT |
14790 | else if (producer_is_icc (cu->producer, &major, &minor)) |
14791 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
14792 | else |
14793 | { | |
14794 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14795 | compliant. */ | |
60d5a603 JK |
14796 | } |
14797 | ||
ba919b58 | 14798 | cu->checked_producer = 1; |
685b1105 | 14799 | } |
ba919b58 | 14800 | |
685b1105 JK |
14801 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14802 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14803 | during 4.6.0 experimental. */ | |
14804 | ||
14805 | static int | |
14806 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
14807 | { | |
14808 | if (!cu->checked_producer) | |
14809 | check_producer (cu); | |
14810 | ||
14811 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14812 | } |
14813 | ||
14814 | /* Return the default accessibility type if it is not overriden by | |
14815 | DW_AT_accessibility. */ | |
14816 | ||
14817 | static enum dwarf_access_attribute | |
14818 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14819 | { | |
14820 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14821 | { | |
14822 | /* The default DWARF 2 accessibility for members is public, the default | |
14823 | accessibility for inheritance is private. */ | |
14824 | ||
14825 | if (die->tag != DW_TAG_inheritance) | |
14826 | return DW_ACCESS_public; | |
14827 | else | |
14828 | return DW_ACCESS_private; | |
14829 | } | |
14830 | else | |
14831 | { | |
14832 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14833 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14834 | depends on the container kind. */ | |
14835 | ||
14836 | if (die->parent->tag == DW_TAG_class_type) | |
14837 | return DW_ACCESS_private; | |
14838 | else | |
14839 | return DW_ACCESS_public; | |
14840 | } | |
14841 | } | |
14842 | ||
74ac6d43 TT |
14843 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14844 | offset. If the attribute was not found return 0, otherwise return | |
14845 | 1. If it was found but could not properly be handled, set *OFFSET | |
14846 | to 0. */ | |
14847 | ||
14848 | static int | |
14849 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14850 | LONGEST *offset) | |
14851 | { | |
14852 | struct attribute *attr; | |
14853 | ||
14854 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14855 | if (attr != NULL) | |
14856 | { | |
14857 | *offset = 0; | |
14858 | ||
14859 | /* Note that we do not check for a section offset first here. | |
14860 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14861 | so if we see it, we can assume that a constant form is really | |
14862 | a constant and not a section offset. */ | |
14863 | if (attr_form_is_constant (attr)) | |
14864 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
14865 | else if (attr_form_is_section_offset (attr)) | |
14866 | dwarf2_complex_location_expr_complaint (); | |
14867 | else if (attr_form_is_block (attr)) | |
14868 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
14869 | else | |
14870 | dwarf2_complex_location_expr_complaint (); | |
14871 | ||
14872 | return 1; | |
14873 | } | |
14874 | ||
14875 | return 0; | |
14876 | } | |
14877 | ||
c906108c SS |
14878 | /* Add an aggregate field to the field list. */ |
14879 | ||
14880 | static void | |
107d2387 | 14881 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14882 | struct dwarf2_cu *cu) |
6e70227d | 14883 | { |
518817b3 | 14884 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 14885 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14886 | struct nextfield *new_field; |
14887 | struct attribute *attr; | |
14888 | struct field *fp; | |
15d034d0 | 14889 | const char *fieldname = ""; |
c906108c | 14890 | |
7d0ccb61 DJ |
14891 | if (die->tag == DW_TAG_inheritance) |
14892 | { | |
be2daae6 TT |
14893 | fip->baseclasses.emplace_back (); |
14894 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14895 | } |
14896 | else | |
14897 | { | |
be2daae6 TT |
14898 | fip->fields.emplace_back (); |
14899 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14900 | } |
be2daae6 | 14901 | |
c906108c SS |
14902 | fip->nfields++; |
14903 | ||
e142c38c | 14904 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
14905 | if (attr) |
14906 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
14907 | else |
14908 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14909 | if (new_field->accessibility != DW_ACCESS_public) |
14910 | fip->non_public_fields = 1; | |
60d5a603 | 14911 | |
e142c38c | 14912 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
14913 | if (attr) |
14914 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
14915 | else |
14916 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14917 | |
14918 | fp = &new_field->field; | |
a9a9bd0f | 14919 | |
e142c38c | 14920 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14921 | { |
74ac6d43 TT |
14922 | LONGEST offset; |
14923 | ||
a9a9bd0f | 14924 | /* Data member other than a C++ static data member. */ |
6e70227d | 14925 | |
c906108c | 14926 | /* Get type of field. */ |
e7c27a73 | 14927 | fp->type = die_type (die, cu); |
c906108c | 14928 | |
d6a843b5 | 14929 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14930 | |
c906108c | 14931 | /* Get bit size of field (zero if none). */ |
e142c38c | 14932 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
14933 | if (attr) |
14934 | { | |
14935 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
14936 | } | |
14937 | else | |
14938 | { | |
14939 | FIELD_BITSIZE (*fp) = 0; | |
14940 | } | |
14941 | ||
14942 | /* Get bit offset of field. */ | |
74ac6d43 TT |
14943 | if (handle_data_member_location (die, cu, &offset)) |
14944 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 14945 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
14946 | if (attr) |
14947 | { | |
5e2b427d | 14948 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
14949 | { |
14950 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
14951 | additional bit offset from the MSB of the containing |
14952 | anonymous object to the MSB of the field. We don't | |
14953 | have to do anything special since we don't need to | |
14954 | know the size of the anonymous object. */ | |
f41f5e61 | 14955 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
14956 | } |
14957 | else | |
14958 | { | |
14959 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
14960 | MSB of the anonymous object, subtract off the number of |
14961 | bits from the MSB of the field to the MSB of the | |
14962 | object, and then subtract off the number of bits of | |
14963 | the field itself. The result is the bit offset of | |
14964 | the LSB of the field. */ | |
c906108c SS |
14965 | int anonymous_size; |
14966 | int bit_offset = DW_UNSND (attr); | |
14967 | ||
e142c38c | 14968 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14969 | if (attr) |
14970 | { | |
14971 | /* The size of the anonymous object containing | |
14972 | the bit field is explicit, so use the | |
14973 | indicated size (in bytes). */ | |
14974 | anonymous_size = DW_UNSND (attr); | |
14975 | } | |
14976 | else | |
14977 | { | |
14978 | /* The size of the anonymous object containing | |
14979 | the bit field must be inferred from the type | |
14980 | attribute of the data member containing the | |
14981 | bit field. */ | |
14982 | anonymous_size = TYPE_LENGTH (fp->type); | |
14983 | } | |
f41f5e61 PA |
14984 | SET_FIELD_BITPOS (*fp, |
14985 | (FIELD_BITPOS (*fp) | |
14986 | + anonymous_size * bits_per_byte | |
14987 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14988 | } |
14989 | } | |
da5b30da AA |
14990 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14991 | if (attr != NULL) | |
14992 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
14993 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
14994 | |
14995 | /* Get name of field. */ | |
39cbfefa DJ |
14996 | fieldname = dwarf2_name (die, cu); |
14997 | if (fieldname == NULL) | |
14998 | fieldname = ""; | |
d8151005 DJ |
14999 | |
15000 | /* The name is already allocated along with this objfile, so we don't | |
15001 | need to duplicate it for the type. */ | |
15002 | fp->name = fieldname; | |
c906108c SS |
15003 | |
15004 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 15005 | pointer or virtual base class pointer) to private. */ |
e142c38c | 15006 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 15007 | { |
d48cc9dd | 15008 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
15009 | new_field->accessibility = DW_ACCESS_private; |
15010 | fip->non_public_fields = 1; | |
15011 | } | |
15012 | } | |
a9a9bd0f | 15013 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 15014 | { |
a9a9bd0f DC |
15015 | /* C++ static member. */ |
15016 | ||
15017 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
15018 | is a declaration, but all versions of G++ as of this writing | |
15019 | (so through at least 3.2.1) incorrectly generate | |
15020 | DW_TAG_variable tags. */ | |
6e70227d | 15021 | |
ff355380 | 15022 | const char *physname; |
c906108c | 15023 | |
a9a9bd0f | 15024 | /* Get name of field. */ |
39cbfefa DJ |
15025 | fieldname = dwarf2_name (die, cu); |
15026 | if (fieldname == NULL) | |
c906108c SS |
15027 | return; |
15028 | ||
254e6b9e | 15029 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
15030 | if (attr |
15031 | /* Only create a symbol if this is an external value. | |
15032 | new_symbol checks this and puts the value in the global symbol | |
15033 | table, which we want. If it is not external, new_symbol | |
15034 | will try to put the value in cu->list_in_scope which is wrong. */ | |
15035 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
15036 | { |
15037 | /* A static const member, not much different than an enum as far as | |
15038 | we're concerned, except that we can support more types. */ | |
15039 | new_symbol (die, NULL, cu); | |
15040 | } | |
15041 | ||
2df3850c | 15042 | /* Get physical name. */ |
ff355380 | 15043 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 15044 | |
d8151005 DJ |
15045 | /* The name is already allocated along with this objfile, so we don't |
15046 | need to duplicate it for the type. */ | |
15047 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 15048 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 15049 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
15050 | } |
15051 | else if (die->tag == DW_TAG_inheritance) | |
15052 | { | |
74ac6d43 | 15053 | LONGEST offset; |
d4b96c9a | 15054 | |
74ac6d43 TT |
15055 | /* C++ base class field. */ |
15056 | if (handle_data_member_location (die, cu, &offset)) | |
15057 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 15058 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 15059 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 15060 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 15061 | } |
2ddeaf8a TT |
15062 | else if (die->tag == DW_TAG_variant_part) |
15063 | { | |
15064 | /* process_structure_scope will treat this DIE as a union. */ | |
15065 | process_structure_scope (die, cu); | |
15066 | ||
15067 | /* The variant part is relative to the start of the enclosing | |
15068 | structure. */ | |
15069 | SET_FIELD_BITPOS (*fp, 0); | |
15070 | fp->type = get_die_type (die, cu); | |
15071 | fp->artificial = 1; | |
15072 | fp->name = "<<variant>>"; | |
15073 | } | |
15074 | else | |
15075 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
15076 | } |
15077 | ||
883fd55a KS |
15078 | /* Can the type given by DIE define another type? */ |
15079 | ||
15080 | static bool | |
15081 | type_can_define_types (const struct die_info *die) | |
15082 | { | |
15083 | switch (die->tag) | |
15084 | { | |
15085 | case DW_TAG_typedef: | |
15086 | case DW_TAG_class_type: | |
15087 | case DW_TAG_structure_type: | |
15088 | case DW_TAG_union_type: | |
15089 | case DW_TAG_enumeration_type: | |
15090 | return true; | |
15091 | ||
15092 | default: | |
15093 | return false; | |
15094 | } | |
15095 | } | |
15096 | ||
15097 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
15098 | |
15099 | static void | |
883fd55a KS |
15100 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
15101 | struct dwarf2_cu *cu) | |
6e70227d | 15102 | { |
be2daae6 TT |
15103 | struct decl_field fp; |
15104 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 15105 | |
883fd55a | 15106 | gdb_assert (type_can_define_types (die)); |
98751a41 | 15107 | |
883fd55a | 15108 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
15109 | fp.name = dwarf2_name (die, cu); |
15110 | fp.type = read_type_die (die, cu); | |
98751a41 | 15111 | |
c191a687 KS |
15112 | /* Save accessibility. */ |
15113 | enum dwarf_access_attribute accessibility; | |
15114 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
15115 | if (attr != NULL) | |
15116 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
15117 | else | |
15118 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15119 | switch (accessibility) | |
15120 | { | |
15121 | case DW_ACCESS_public: | |
15122 | /* The assumed value if neither private nor protected. */ | |
15123 | break; | |
15124 | case DW_ACCESS_private: | |
be2daae6 | 15125 | fp.is_private = 1; |
c191a687 KS |
15126 | break; |
15127 | case DW_ACCESS_protected: | |
be2daae6 | 15128 | fp.is_protected = 1; |
c191a687 KS |
15129 | break; |
15130 | default: | |
b98664d3 | 15131 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
15132 | } |
15133 | ||
883fd55a | 15134 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 15135 | fip->typedef_field_list.push_back (fp); |
883fd55a | 15136 | else |
be2daae6 | 15137 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
15138 | } |
15139 | ||
c906108c SS |
15140 | /* Create the vector of fields, and attach it to the type. */ |
15141 | ||
15142 | static void | |
fba45db2 | 15143 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15144 | struct dwarf2_cu *cu) |
c906108c SS |
15145 | { |
15146 | int nfields = fip->nfields; | |
15147 | ||
15148 | /* Record the field count, allocate space for the array of fields, | |
15149 | and create blank accessibility bitfields if necessary. */ | |
15150 | TYPE_NFIELDS (type) = nfields; | |
15151 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 15152 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 15153 | |
b4ba55a1 | 15154 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
15155 | { |
15156 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15157 | ||
15158 | TYPE_FIELD_PRIVATE_BITS (type) = | |
15159 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15160 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
15161 | ||
15162 | TYPE_FIELD_PROTECTED_BITS (type) = | |
15163 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15164 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
15165 | ||
774b6a14 TT |
15166 | TYPE_FIELD_IGNORE_BITS (type) = |
15167 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15168 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
15169 | } |
15170 | ||
15171 | /* If the type has baseclasses, allocate and clear a bit vector for | |
15172 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 15173 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 15174 | { |
be2daae6 | 15175 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 15176 | unsigned char *pointer; |
c906108c SS |
15177 | |
15178 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 15179 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 15180 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
15181 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
15182 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
15183 | } |
15184 | ||
2ddeaf8a TT |
15185 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
15186 | { | |
15187 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
15188 | ||
be2daae6 | 15189 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 15190 | { |
be2daae6 TT |
15191 | struct nextfield &field = fip->fields[index]; |
15192 | ||
15193 | if (field.variant.is_discriminant) | |
2ddeaf8a | 15194 | di->discriminant_index = index; |
be2daae6 | 15195 | else if (field.variant.default_branch) |
2ddeaf8a TT |
15196 | di->default_index = index; |
15197 | else | |
be2daae6 | 15198 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
15199 | } |
15200 | } | |
15201 | ||
be2daae6 TT |
15202 | /* Copy the saved-up fields into the field vector. */ |
15203 | for (int i = 0; i < nfields; ++i) | |
c906108c | 15204 | { |
be2daae6 TT |
15205 | struct nextfield &field |
15206 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
15207 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 15208 | |
be2daae6 TT |
15209 | TYPE_FIELD (type, i) = field.field; |
15210 | switch (field.accessibility) | |
c906108c | 15211 | { |
c5aa993b | 15212 | case DW_ACCESS_private: |
b4ba55a1 | 15213 | if (cu->language != language_ada) |
be2daae6 | 15214 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 15215 | break; |
c906108c | 15216 | |
c5aa993b | 15217 | case DW_ACCESS_protected: |
b4ba55a1 | 15218 | if (cu->language != language_ada) |
be2daae6 | 15219 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 15220 | break; |
c906108c | 15221 | |
c5aa993b JM |
15222 | case DW_ACCESS_public: |
15223 | break; | |
c906108c | 15224 | |
c5aa993b JM |
15225 | default: |
15226 | /* Unknown accessibility. Complain and treat it as public. */ | |
15227 | { | |
b98664d3 | 15228 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 15229 | field.accessibility); |
c5aa993b JM |
15230 | } |
15231 | break; | |
c906108c | 15232 | } |
be2daae6 | 15233 | if (i < fip->baseclasses.size ()) |
c906108c | 15234 | { |
be2daae6 | 15235 | switch (field.virtuality) |
c906108c | 15236 | { |
c5aa993b JM |
15237 | case DW_VIRTUALITY_virtual: |
15238 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 15239 | if (cu->language == language_ada) |
a73c6dcd | 15240 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 15241 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 15242 | break; |
c906108c SS |
15243 | } |
15244 | } | |
c906108c SS |
15245 | } |
15246 | } | |
15247 | ||
7d27a96d TT |
15248 | /* Return true if this member function is a constructor, false |
15249 | otherwise. */ | |
15250 | ||
15251 | static int | |
15252 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
15253 | { | |
15254 | const char *fieldname; | |
fe978cb0 | 15255 | const char *type_name; |
7d27a96d TT |
15256 | int len; |
15257 | ||
15258 | if (die->parent == NULL) | |
15259 | return 0; | |
15260 | ||
15261 | if (die->parent->tag != DW_TAG_structure_type | |
15262 | && die->parent->tag != DW_TAG_union_type | |
15263 | && die->parent->tag != DW_TAG_class_type) | |
15264 | return 0; | |
15265 | ||
15266 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
15267 | type_name = dwarf2_name (die->parent, cu); |
15268 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
15269 | return 0; |
15270 | ||
15271 | len = strlen (fieldname); | |
fe978cb0 PA |
15272 | return (strncmp (fieldname, type_name, len) == 0 |
15273 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
15274 | } |
15275 | ||
c906108c SS |
15276 | /* Add a member function to the proper fieldlist. */ |
15277 | ||
15278 | static void | |
107d2387 | 15279 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15280 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 15281 | { |
518817b3 | 15282 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15283 | struct attribute *attr; |
c906108c | 15284 | int i; |
be2daae6 | 15285 | struct fnfieldlist *flp = nullptr; |
c906108c | 15286 | struct fn_field *fnp; |
15d034d0 | 15287 | const char *fieldname; |
f792889a | 15288 | struct type *this_type; |
60d5a603 | 15289 | enum dwarf_access_attribute accessibility; |
c906108c | 15290 | |
b4ba55a1 | 15291 | if (cu->language == language_ada) |
a73c6dcd | 15292 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 15293 | |
2df3850c | 15294 | /* Get name of member function. */ |
39cbfefa DJ |
15295 | fieldname = dwarf2_name (die, cu); |
15296 | if (fieldname == NULL) | |
2df3850c | 15297 | return; |
c906108c | 15298 | |
c906108c | 15299 | /* Look up member function name in fieldlist. */ |
be2daae6 | 15300 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15301 | { |
27bfe10e | 15302 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
15303 | { |
15304 | flp = &fip->fnfieldlists[i]; | |
15305 | break; | |
15306 | } | |
c906108c SS |
15307 | } |
15308 | ||
be2daae6 TT |
15309 | /* Create a new fnfieldlist if necessary. */ |
15310 | if (flp == nullptr) | |
c906108c | 15311 | { |
be2daae6 TT |
15312 | fip->fnfieldlists.emplace_back (); |
15313 | flp = &fip->fnfieldlists.back (); | |
c906108c | 15314 | flp->name = fieldname; |
be2daae6 | 15315 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
15316 | } |
15317 | ||
be2daae6 TT |
15318 | /* Create a new member function field and add it to the vector of |
15319 | fnfieldlists. */ | |
15320 | flp->fnfields.emplace_back (); | |
15321 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
15322 | |
15323 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 15324 | if (cu->language == language_cplus) |
be2daae6 TT |
15325 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
15326 | die, cu); | |
3da10d80 KS |
15327 | else |
15328 | { | |
1d06ead6 | 15329 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15330 | fnp->physname = physname ? physname : ""; |
15331 | } | |
15332 | ||
c906108c | 15333 | fnp->type = alloc_type (objfile); |
f792889a DJ |
15334 | this_type = read_type_die (die, cu); |
15335 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 15336 | { |
f792889a | 15337 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 15338 | |
f792889a | 15339 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15340 | of the method itself (TYPE_CODE_METHOD). */ |
15341 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
15342 | TYPE_TARGET_TYPE (this_type), |
15343 | TYPE_FIELDS (this_type), | |
15344 | TYPE_NFIELDS (this_type), | |
15345 | TYPE_VARARGS (this_type)); | |
c906108c SS |
15346 | |
15347 | /* Handle static member functions. | |
c5aa993b | 15348 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
15349 | member functions. G++ helps GDB by marking the first |
15350 | parameter for non-static member functions (which is the this | |
15351 | pointer) as artificial. We obtain this information from | |
15352 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15353 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15354 | fnp->voffset = VOFFSET_STATIC; |
15355 | } | |
15356 | else | |
b98664d3 | 15357 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15358 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15359 | |
15360 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15361 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15362 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15363 | |
3e43a32a MS |
15364 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15365 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15366 | |
15367 | /* Get accessibility. */ | |
e142c38c | 15368 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 15369 | if (attr) |
aead7601 | 15370 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
15371 | else |
15372 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15373 | switch (accessibility) | |
c906108c | 15374 | { |
60d5a603 JK |
15375 | case DW_ACCESS_private: |
15376 | fnp->is_private = 1; | |
15377 | break; | |
15378 | case DW_ACCESS_protected: | |
15379 | fnp->is_protected = 1; | |
15380 | break; | |
c906108c SS |
15381 | } |
15382 | ||
b02dede2 | 15383 | /* Check for artificial methods. */ |
e142c38c | 15384 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15385 | if (attr && DW_UNSND (attr) != 0) |
15386 | fnp->is_artificial = 1; | |
15387 | ||
7d27a96d TT |
15388 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15389 | ||
0d564a31 | 15390 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15391 | function. For older versions of GCC, this is an offset in the |
15392 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15393 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15394 | to the object address. */ |
15395 | ||
e142c38c | 15396 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 15397 | if (attr) |
8e19ed76 | 15398 | { |
aec5aa8b | 15399 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15400 | { |
aec5aa8b TT |
15401 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15402 | { | |
15403 | /* Old-style GCC. */ | |
15404 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15405 | } | |
15406 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15407 | || (DW_BLOCK (attr)->size > 1 | |
15408 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15409 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15410 | { | |
aec5aa8b TT |
15411 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15412 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15413 | dwarf2_complex_location_expr_complaint (); | |
15414 | else | |
15415 | fnp->voffset /= cu->header.addr_size; | |
15416 | fnp->voffset += 2; | |
15417 | } | |
15418 | else | |
15419 | dwarf2_complex_location_expr_complaint (); | |
15420 | ||
15421 | if (!fnp->fcontext) | |
7e993ebf KS |
15422 | { |
15423 | /* If there is no `this' field and no DW_AT_containing_type, | |
15424 | we cannot actually find a base class context for the | |
15425 | vtable! */ | |
15426 | if (TYPE_NFIELDS (this_type) == 0 | |
15427 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15428 | { | |
b98664d3 | 15429 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15430 | "function \"%s\" (offset %s)"), |
15431 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15432 | } |
15433 | else | |
15434 | { | |
15435 | fnp->fcontext | |
15436 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15437 | } | |
15438 | } | |
aec5aa8b | 15439 | } |
3690dd37 | 15440 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 15441 | { |
4d3c2250 | 15442 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15443 | } |
15444 | else | |
15445 | { | |
4d3c2250 KB |
15446 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15447 | fieldname); | |
8e19ed76 | 15448 | } |
0d564a31 | 15449 | } |
d48cc9dd DJ |
15450 | else |
15451 | { | |
15452 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15453 | if (attr && DW_UNSND (attr)) | |
15454 | { | |
15455 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15456 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15457 | "but the vtable offset is not specified"), |
9d8780f0 | 15458 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15459 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15460 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15461 | } | |
15462 | } | |
c906108c SS |
15463 | } |
15464 | ||
15465 | /* Create the vector of member function fields, and attach it to the type. */ | |
15466 | ||
15467 | static void | |
fba45db2 | 15468 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15469 | struct dwarf2_cu *cu) |
c906108c | 15470 | { |
b4ba55a1 | 15471 | if (cu->language == language_ada) |
a73c6dcd | 15472 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15473 | |
c906108c SS |
15474 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15475 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15476 | TYPE_ALLOC (type, |
15477 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15478 | |
be2daae6 | 15479 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15480 | { |
be2daae6 | 15481 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15482 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15483 | |
be2daae6 TT |
15484 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15485 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15486 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15487 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15488 | ||
15489 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15490 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15491 | } |
15492 | ||
be2daae6 | 15493 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15494 | } |
15495 | ||
1168df01 JB |
15496 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15497 | language, zero otherwise. */ | |
15498 | static int | |
15499 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15500 | { | |
15501 | static const char vptr[] = "_vptr"; | |
15502 | ||
9c37b5ae TT |
15503 | /* Look for the C++ form of the vtable. */ |
15504 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15505 | return 1; |
15506 | ||
15507 | return 0; | |
15508 | } | |
15509 | ||
c0dd20ea | 15510 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15511 | functions, with the ABI-specified layout. If TYPE describes |
15512 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15513 | |
15514 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15515 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15516 | |
0b92b5bb TT |
15517 | static void |
15518 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15519 | { |
09e2d7c7 | 15520 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15521 | |
15522 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
15523 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
15524 | return; | |
c0dd20ea DJ |
15525 | |
15526 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15527 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15528 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15529 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15530 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15531 | return; | |
c0dd20ea DJ |
15532 | |
15533 | /* Find the type of the method. */ | |
0b92b5bb | 15534 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
15535 | if (pfn_type == NULL |
15536 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
15537 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 15538 | return; |
c0dd20ea DJ |
15539 | |
15540 | /* Look for the "this" argument. */ | |
15541 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15542 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15543 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 15544 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 15545 | return; |
c0dd20ea | 15546 | |
09e2d7c7 | 15547 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15548 | new_type = alloc_type (objfile); |
09e2d7c7 | 15549 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15550 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15551 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15552 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15553 | } |
1168df01 | 15554 | |
2b4424c3 TT |
15555 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15556 | appropriate error checking and issuing complaints if there is a | |
15557 | problem. */ | |
15558 | ||
15559 | static ULONGEST | |
15560 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15561 | { | |
15562 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15563 | ||
15564 | if (attr == nullptr) | |
15565 | return 0; | |
15566 | ||
15567 | if (!attr_form_is_constant (attr)) | |
15568 | { | |
b98664d3 | 15569 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15570 | " - DIE at %s [in module %s]"), |
15571 | sect_offset_str (die->sect_off), | |
15572 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15573 | return 0; | |
15574 | } | |
15575 | ||
15576 | ULONGEST align; | |
15577 | if (attr->form == DW_FORM_sdata) | |
15578 | { | |
15579 | LONGEST val = DW_SND (attr); | |
15580 | if (val < 0) | |
15581 | { | |
b98664d3 | 15582 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
15583 | " - DIE at %s [in module %s]"), |
15584 | sect_offset_str (die->sect_off), | |
15585 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15586 | return 0; | |
15587 | } | |
15588 | align = val; | |
15589 | } | |
15590 | else | |
15591 | align = DW_UNSND (attr); | |
15592 | ||
15593 | if (align == 0) | |
15594 | { | |
b98664d3 | 15595 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15596 | " - DIE at %s [in module %s]"), |
15597 | sect_offset_str (die->sect_off), | |
15598 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15599 | return 0; | |
15600 | } | |
15601 | if ((align & (align - 1)) != 0) | |
15602 | { | |
b98664d3 | 15603 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15604 | " - DIE at %s [in module %s]"), |
15605 | sect_offset_str (die->sect_off), | |
15606 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15607 | return 0; | |
15608 | } | |
15609 | ||
15610 | return align; | |
15611 | } | |
15612 | ||
15613 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15614 | the alignment for TYPE. */ | |
15615 | ||
15616 | static void | |
15617 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15618 | struct type *type) | |
15619 | { | |
15620 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15621 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15622 | " - DIE at %s [in module %s]"), |
15623 | sect_offset_str (die->sect_off), | |
15624 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15625 | } | |
685b1105 | 15626 | |
c906108c | 15627 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15628 | (definition) to create a type for the structure or union. Fill in |
15629 | the type's name and general properties; the members will not be | |
83655187 DE |
15630 | processed until process_structure_scope. A symbol table entry for |
15631 | the type will also not be done until process_structure_scope (assuming | |
15632 | the type has a name). | |
c906108c | 15633 | |
c767944b DJ |
15634 | NOTE: we need to call these functions regardless of whether or not the |
15635 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15636 | structure or union. This gets the type entered into our set of |
83655187 | 15637 | user defined types. */ |
c906108c | 15638 | |
f792889a | 15639 | static struct type * |
134d01f1 | 15640 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15641 | { |
518817b3 | 15642 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15643 | struct type *type; |
15644 | struct attribute *attr; | |
15d034d0 | 15645 | const char *name; |
c906108c | 15646 | |
348e048f DE |
15647 | /* If the definition of this type lives in .debug_types, read that type. |
15648 | Don't follow DW_AT_specification though, that will take us back up | |
15649 | the chain and we want to go down. */ | |
45e58e77 | 15650 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
15651 | if (attr) |
15652 | { | |
ac9ec31b | 15653 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15654 | |
ac9ec31b | 15655 | /* The type's CU may not be the same as CU. |
02142a6c | 15656 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15657 | return set_die_type (die, type, cu); |
15658 | } | |
15659 | ||
c0dd20ea | 15660 | type = alloc_type (objfile); |
c906108c | 15661 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15662 | |
39cbfefa DJ |
15663 | name = dwarf2_name (die, cu); |
15664 | if (name != NULL) | |
c906108c | 15665 | { |
987504bb | 15666 | if (cu->language == language_cplus |
c44af4eb TT |
15667 | || cu->language == language_d |
15668 | || cu->language == language_rust) | |
63d06c5c | 15669 | { |
15d034d0 | 15670 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15671 | |
15672 | /* dwarf2_full_name might have already finished building the DIE's | |
15673 | type. If so, there is no need to continue. */ | |
15674 | if (get_die_type (die, cu) != NULL) | |
15675 | return get_die_type (die, cu); | |
15676 | ||
e86ca25f | 15677 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15678 | } |
15679 | else | |
15680 | { | |
d8151005 DJ |
15681 | /* The name is already allocated along with this objfile, so |
15682 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15683 | TYPE_NAME (type) = name; |
63d06c5c | 15684 | } |
c906108c SS |
15685 | } |
15686 | ||
15687 | if (die->tag == DW_TAG_structure_type) | |
15688 | { | |
15689 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15690 | } | |
15691 | else if (die->tag == DW_TAG_union_type) | |
15692 | { | |
15693 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15694 | } | |
2ddeaf8a TT |
15695 | else if (die->tag == DW_TAG_variant_part) |
15696 | { | |
15697 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15698 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15699 | } | |
c906108c SS |
15700 | else |
15701 | { | |
4753d33b | 15702 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15703 | } |
15704 | ||
0cc2414c TT |
15705 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15706 | TYPE_DECLARED_CLASS (type) = 1; | |
15707 | ||
e142c38c | 15708 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15709 | if (attr) |
15710 | { | |
155bfbd3 JB |
15711 | if (attr_form_is_constant (attr)) |
15712 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15713 | else | |
15714 | { | |
15715 | /* For the moment, dynamic type sizes are not supported | |
15716 | by GDB's struct type. The actual size is determined | |
15717 | on-demand when resolving the type of a given object, | |
15718 | so set the type's length to zero for now. Otherwise, | |
15719 | we record an expression as the length, and that expression | |
15720 | could lead to a very large value, which could eventually | |
15721 | lead to us trying to allocate that much memory when creating | |
15722 | a value of that type. */ | |
15723 | TYPE_LENGTH (type) = 0; | |
15724 | } | |
c906108c SS |
15725 | } |
15726 | else | |
15727 | { | |
15728 | TYPE_LENGTH (type) = 0; | |
15729 | } | |
15730 | ||
2b4424c3 TT |
15731 | maybe_set_alignment (cu, die, type); |
15732 | ||
5230b05a | 15733 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15734 | { |
5230b05a WT |
15735 | /* ICC<14 does not output the required DW_AT_declaration on |
15736 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15737 | TYPE_STUB (type) = 1; |
685b1105 JK |
15738 | } |
15739 | else | |
15740 | TYPE_STUB_SUPPORTED (type) = 1; | |
15741 | ||
dc718098 | 15742 | if (die_is_declaration (die, cu)) |
876cecd0 | 15743 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15744 | else if (attr == NULL && die->child == NULL |
15745 | && producer_is_realview (cu->producer)) | |
15746 | /* RealView does not output the required DW_AT_declaration | |
15747 | on incomplete types. */ | |
15748 | TYPE_STUB (type) = 1; | |
dc718098 | 15749 | |
c906108c SS |
15750 | /* We need to add the type field to the die immediately so we don't |
15751 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15752 | type within the structure itself. */ |
1c379e20 | 15753 | set_die_type (die, type, cu); |
c906108c | 15754 | |
7e314c57 JK |
15755 | /* set_die_type should be already done. */ |
15756 | set_descriptive_type (type, die, cu); | |
15757 | ||
c767944b DJ |
15758 | return type; |
15759 | } | |
15760 | ||
2ddeaf8a TT |
15761 | /* A helper for process_structure_scope that handles a single member |
15762 | DIE. */ | |
15763 | ||
15764 | static void | |
15765 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15766 | struct field_info *fi, | |
15767 | std::vector<struct symbol *> *template_args, | |
15768 | struct dwarf2_cu *cu) | |
15769 | { | |
15770 | if (child_die->tag == DW_TAG_member | |
15771 | || child_die->tag == DW_TAG_variable | |
15772 | || child_die->tag == DW_TAG_variant_part) | |
15773 | { | |
15774 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15775 | should be a DW_TAG_member that is a declaration, but | |
15776 | all versions of G++ as of this writing (so through at | |
15777 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15778 | tags for them instead. */ | |
15779 | dwarf2_add_field (fi, child_die, cu); | |
15780 | } | |
15781 | else if (child_die->tag == DW_TAG_subprogram) | |
15782 | { | |
15783 | /* Rust doesn't have member functions in the C++ sense. | |
15784 | However, it does emit ordinary functions as children | |
15785 | of a struct DIE. */ | |
15786 | if (cu->language == language_rust) | |
15787 | read_func_scope (child_die, cu); | |
15788 | else | |
15789 | { | |
15790 | /* C++ member function. */ | |
15791 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15792 | } | |
15793 | } | |
15794 | else if (child_die->tag == DW_TAG_inheritance) | |
15795 | { | |
15796 | /* C++ base class field. */ | |
15797 | dwarf2_add_field (fi, child_die, cu); | |
15798 | } | |
15799 | else if (type_can_define_types (child_die)) | |
15800 | dwarf2_add_type_defn (fi, child_die, cu); | |
15801 | else if (child_die->tag == DW_TAG_template_type_param | |
15802 | || child_die->tag == DW_TAG_template_value_param) | |
15803 | { | |
15804 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15805 | ||
15806 | if (arg != NULL) | |
15807 | template_args->push_back (arg); | |
15808 | } | |
15809 | else if (child_die->tag == DW_TAG_variant) | |
15810 | { | |
15811 | /* In a variant we want to get the discriminant and also add a | |
15812 | field for our sole member child. */ | |
15813 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15814 | ||
15815 | for (struct die_info *variant_child = child_die->child; | |
15816 | variant_child != NULL; | |
15817 | variant_child = sibling_die (variant_child)) | |
15818 | { | |
15819 | if (variant_child->tag == DW_TAG_member) | |
15820 | { | |
15821 | handle_struct_member_die (variant_child, type, fi, | |
15822 | template_args, cu); | |
15823 | /* Only handle the one. */ | |
15824 | break; | |
15825 | } | |
15826 | } | |
15827 | ||
15828 | /* We don't handle this but we might as well report it if we see | |
15829 | it. */ | |
15830 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15831 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15832 | " - DIE at %s [in module %s]"), |
15833 | sect_offset_str (child_die->sect_off), | |
15834 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15835 | ||
15836 | /* The first field was just added, so we can stash the | |
15837 | discriminant there. */ | |
be2daae6 | 15838 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15839 | if (discr == NULL) |
be2daae6 | 15840 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15841 | else |
be2daae6 | 15842 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
15843 | } |
15844 | } | |
15845 | ||
c767944b DJ |
15846 | /* Finish creating a structure or union type, including filling in |
15847 | its members and creating a symbol for it. */ | |
15848 | ||
15849 | static void | |
15850 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15851 | { | |
518817b3 | 15852 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15853 | struct die_info *child_die; |
c767944b DJ |
15854 | struct type *type; |
15855 | ||
15856 | type = get_die_type (die, cu); | |
15857 | if (type == NULL) | |
15858 | type = read_structure_type (die, cu); | |
15859 | ||
2ddeaf8a TT |
15860 | /* When reading a DW_TAG_variant_part, we need to notice when we |
15861 | read the discriminant member, so we can record it later in the | |
15862 | discriminant_info. */ | |
15863 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
15864 | sect_offset discr_offset; | |
15865 | ||
15866 | if (is_variant_part) | |
15867 | { | |
15868 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15869 | if (discr == NULL) | |
15870 | { | |
15871 | /* Maybe it's a univariant form, an extension we support. | |
15872 | In this case arrange not to check the offset. */ | |
15873 | is_variant_part = false; | |
15874 | } | |
15875 | else if (attr_form_is_ref (discr)) | |
15876 | { | |
15877 | struct dwarf2_cu *target_cu = cu; | |
15878 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15879 | ||
15880 | discr_offset = target_die->sect_off; | |
15881 | } | |
15882 | else | |
15883 | { | |
b98664d3 | 15884 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
15885 | " - DIE at %s [in module %s]"), |
15886 | sect_offset_str (die->sect_off), | |
15887 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15888 | is_variant_part = false; | |
15889 | } | |
15890 | } | |
15891 | ||
e142c38c | 15892 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15893 | { |
15894 | struct field_info fi; | |
2f4732b0 | 15895 | std::vector<struct symbol *> template_args; |
c906108c | 15896 | |
639d11d3 | 15897 | child_die = die->child; |
c906108c SS |
15898 | |
15899 | while (child_die && child_die->tag) | |
15900 | { | |
2ddeaf8a | 15901 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 15902 | |
2ddeaf8a | 15903 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 15904 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 15905 | |
c906108c SS |
15906 | child_die = sibling_die (child_die); |
15907 | } | |
15908 | ||
34eaf542 | 15909 | /* Attach template arguments to type. */ |
2f4732b0 | 15910 | if (!template_args.empty ()) |
34eaf542 TT |
15911 | { |
15912 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 15913 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15914 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15915 | = XOBNEWVEC (&objfile->objfile_obstack, |
15916 | struct symbol *, | |
15917 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15918 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15919 | template_args.data (), |
34eaf542 TT |
15920 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15921 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15922 | } |
15923 | ||
c906108c SS |
15924 | /* Attach fields and member functions to the type. */ |
15925 | if (fi.nfields) | |
e7c27a73 | 15926 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15927 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15928 | { |
e7c27a73 | 15929 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15930 | |
c5aa993b | 15931 | /* Get the type which refers to the base class (possibly this |
c906108c | 15932 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15933 | class from the DW_AT_containing_type attribute. This use of |
15934 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15935 | |
e142c38c | 15936 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15937 | { |
e7c27a73 | 15938 | struct type *t = die_containing_type (die, cu); |
c906108c | 15939 | |
ae6ae975 | 15940 | set_type_vptr_basetype (type, t); |
c906108c SS |
15941 | if (type == t) |
15942 | { | |
c906108c SS |
15943 | int i; |
15944 | ||
15945 | /* Our own class provides vtbl ptr. */ | |
15946 | for (i = TYPE_NFIELDS (t) - 1; | |
15947 | i >= TYPE_N_BASECLASSES (t); | |
15948 | --i) | |
15949 | { | |
0d5cff50 | 15950 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15951 | |
1168df01 | 15952 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15953 | { |
ae6ae975 | 15954 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15955 | break; |
15956 | } | |
15957 | } | |
15958 | ||
15959 | /* Complain if virtual function table field not found. */ | |
15960 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15961 | complaint (_("virtual function table pointer " |
3e43a32a | 15962 | "not found when defining class '%s'"), |
e86ca25f | 15963 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
15964 | } |
15965 | else | |
15966 | { | |
ae6ae975 | 15967 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15968 | } |
15969 | } | |
f6235d4c | 15970 | else if (cu->producer |
61012eef | 15971 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15972 | { |
15973 | /* The IBM XLC compiler does not provide direct indication | |
15974 | of the containing type, but the vtable pointer is | |
15975 | always named __vfp. */ | |
15976 | ||
15977 | int i; | |
15978 | ||
15979 | for (i = TYPE_NFIELDS (type) - 1; | |
15980 | i >= TYPE_N_BASECLASSES (type); | |
15981 | --i) | |
15982 | { | |
15983 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15984 | { | |
ae6ae975 DE |
15985 | set_type_vptr_fieldno (type, i); |
15986 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15987 | break; |
15988 | } | |
15989 | } | |
15990 | } | |
c906108c | 15991 | } |
98751a41 JK |
15992 | |
15993 | /* Copy fi.typedef_field_list linked list elements content into the | |
15994 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15995 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15996 | { |
be2daae6 | 15997 | int count = fi.typedef_field_list.size (); |
98751a41 | 15998 | |
a0d7a4ff | 15999 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 16000 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 16001 | = ((struct decl_field *) |
be2daae6 TT |
16002 | TYPE_ALLOC (type, |
16003 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
16004 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 16005 | |
be2daae6 TT |
16006 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
16007 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 16008 | } |
c767944b | 16009 | |
883fd55a KS |
16010 | /* Copy fi.nested_types_list linked list elements content into the |
16011 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 16012 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 16013 | { |
be2daae6 | 16014 | int count = fi.nested_types_list.size (); |
883fd55a KS |
16015 | |
16016 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
16017 | TYPE_NESTED_TYPES_ARRAY (type) | |
16018 | = ((struct decl_field *) | |
be2daae6 TT |
16019 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
16020 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 16021 | |
be2daae6 TT |
16022 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
16023 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 16024 | } |
c906108c | 16025 | } |
63d06c5c | 16026 | |
bb5ed363 | 16027 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
16028 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
16029 | cu->rust_unions.push_back (type); | |
0b92b5bb | 16030 | |
90aeadfc DC |
16031 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
16032 | snapshots) has been known to create a die giving a declaration | |
16033 | for a class that has, as a child, a die giving a definition for a | |
16034 | nested class. So we have to process our children even if the | |
16035 | current die is a declaration. Normally, of course, a declaration | |
16036 | won't have any children at all. */ | |
134d01f1 | 16037 | |
ca040673 DE |
16038 | child_die = die->child; |
16039 | ||
90aeadfc DC |
16040 | while (child_die != NULL && child_die->tag) |
16041 | { | |
16042 | if (child_die->tag == DW_TAG_member | |
16043 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
16044 | || child_die->tag == DW_TAG_inheritance |
16045 | || child_die->tag == DW_TAG_template_value_param | |
16046 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 16047 | { |
90aeadfc | 16048 | /* Do nothing. */ |
134d01f1 | 16049 | } |
90aeadfc DC |
16050 | else |
16051 | process_die (child_die, cu); | |
134d01f1 | 16052 | |
90aeadfc | 16053 | child_die = sibling_die (child_die); |
134d01f1 DJ |
16054 | } |
16055 | ||
fa4028e9 JB |
16056 | /* Do not consider external references. According to the DWARF standard, |
16057 | these DIEs are identified by the fact that they have no byte_size | |
16058 | attribute, and a declaration attribute. */ | |
16059 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
16060 | || !die_is_declaration (die, cu)) | |
c767944b | 16061 | new_symbol (die, type, cu); |
134d01f1 DJ |
16062 | } |
16063 | ||
55426c9d JB |
16064 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
16065 | update TYPE using some information only available in DIE's children. */ | |
16066 | ||
16067 | static void | |
16068 | update_enumeration_type_from_children (struct die_info *die, | |
16069 | struct type *type, | |
16070 | struct dwarf2_cu *cu) | |
16071 | { | |
60f7655a | 16072 | struct die_info *child_die; |
55426c9d JB |
16073 | int unsigned_enum = 1; |
16074 | int flag_enum = 1; | |
16075 | ULONGEST mask = 0; | |
55426c9d | 16076 | |
8268c778 | 16077 | auto_obstack obstack; |
55426c9d | 16078 | |
60f7655a DE |
16079 | for (child_die = die->child; |
16080 | child_die != NULL && child_die->tag; | |
16081 | child_die = sibling_die (child_die)) | |
55426c9d JB |
16082 | { |
16083 | struct attribute *attr; | |
16084 | LONGEST value; | |
16085 | const gdb_byte *bytes; | |
16086 | struct dwarf2_locexpr_baton *baton; | |
16087 | const char *name; | |
60f7655a | 16088 | |
55426c9d JB |
16089 | if (child_die->tag != DW_TAG_enumerator) |
16090 | continue; | |
16091 | ||
16092 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16093 | if (attr == NULL) | |
16094 | continue; | |
16095 | ||
16096 | name = dwarf2_name (child_die, cu); | |
16097 | if (name == NULL) | |
16098 | name = "<anonymous enumerator>"; | |
16099 | ||
16100 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16101 | &value, &bytes, &baton); | |
16102 | if (value < 0) | |
16103 | { | |
16104 | unsigned_enum = 0; | |
16105 | flag_enum = 0; | |
16106 | } | |
16107 | else if ((mask & value) != 0) | |
16108 | flag_enum = 0; | |
16109 | else | |
16110 | mask |= value; | |
16111 | ||
16112 | /* If we already know that the enum type is neither unsigned, nor | |
16113 | a flag type, no need to look at the rest of the enumerates. */ | |
16114 | if (!unsigned_enum && !flag_enum) | |
16115 | break; | |
55426c9d JB |
16116 | } |
16117 | ||
16118 | if (unsigned_enum) | |
16119 | TYPE_UNSIGNED (type) = 1; | |
16120 | if (flag_enum) | |
16121 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
16122 | } |
16123 | ||
134d01f1 DJ |
16124 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16125 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16126 | |
f792889a | 16127 | static struct type * |
134d01f1 | 16128 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16129 | { |
518817b3 | 16130 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16131 | struct type *type; |
c906108c | 16132 | struct attribute *attr; |
0114d602 | 16133 | const char *name; |
134d01f1 | 16134 | |
348e048f DE |
16135 | /* If the definition of this type lives in .debug_types, read that type. |
16136 | Don't follow DW_AT_specification though, that will take us back up | |
16137 | the chain and we want to go down. */ | |
45e58e77 | 16138 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
16139 | if (attr) |
16140 | { | |
ac9ec31b | 16141 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16142 | |
ac9ec31b | 16143 | /* The type's CU may not be the same as CU. |
02142a6c | 16144 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16145 | return set_die_type (die, type, cu); |
16146 | } | |
16147 | ||
c906108c SS |
16148 | type = alloc_type (objfile); |
16149 | ||
16150 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 16151 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16152 | if (name != NULL) |
e86ca25f | 16153 | TYPE_NAME (type) = name; |
c906108c | 16154 | |
0626fc76 TT |
16155 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16156 | if (attr != NULL) | |
16157 | { | |
16158 | struct type *underlying_type = die_type (die, cu); | |
16159 | ||
16160 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16161 | } | |
16162 | ||
e142c38c | 16163 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16164 | if (attr) |
16165 | { | |
16166 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16167 | } | |
16168 | else | |
16169 | { | |
16170 | TYPE_LENGTH (type) = 0; | |
16171 | } | |
16172 | ||
2b4424c3 TT |
16173 | maybe_set_alignment (cu, die, type); |
16174 | ||
137033e9 JB |
16175 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16176 | declared as private in the package spec, and then defined only | |
16177 | inside the package body. Such types are known as Taft Amendment | |
16178 | Types. When another package uses such a type, an incomplete DIE | |
16179 | may be generated by the compiler. */ | |
02eb380e | 16180 | if (die_is_declaration (die, cu)) |
876cecd0 | 16181 | TYPE_STUB (type) = 1; |
02eb380e | 16182 | |
0626fc76 TT |
16183 | /* Finish the creation of this type by using the enum's children. |
16184 | We must call this even when the underlying type has been provided | |
16185 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
16186 | update_enumeration_type_from_children (die, type, cu); |
16187 | ||
0626fc76 TT |
16188 | /* If this type has an underlying type that is not a stub, then we |
16189 | may use its attributes. We always use the "unsigned" attribute | |
16190 | in this situation, because ordinarily we guess whether the type | |
16191 | is unsigned -- but the guess can be wrong and the underlying type | |
16192 | can tell us the reality. However, we defer to a local size | |
16193 | attribute if one exists, because this lets the compiler override | |
16194 | the underlying type if needed. */ | |
16195 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
16196 | { | |
16197 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
16198 | if (TYPE_LENGTH (type) == 0) | |
16199 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
16200 | if (TYPE_RAW_ALIGN (type) == 0 |
16201 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
16202 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
16203 | } |
16204 | ||
3d567982 TT |
16205 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
16206 | ||
f792889a | 16207 | return set_die_type (die, type, cu); |
134d01f1 DJ |
16208 | } |
16209 | ||
16210 | /* Given a pointer to a die which begins an enumeration, process all | |
16211 | the dies that define the members of the enumeration, and create the | |
16212 | symbol for the enumeration type. | |
16213 | ||
16214 | NOTE: We reverse the order of the element list. */ | |
16215 | ||
16216 | static void | |
16217 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16218 | { | |
f792889a | 16219 | struct type *this_type; |
134d01f1 | 16220 | |
f792889a DJ |
16221 | this_type = get_die_type (die, cu); |
16222 | if (this_type == NULL) | |
16223 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16224 | |
639d11d3 | 16225 | if (die->child != NULL) |
c906108c | 16226 | { |
9dc481d3 DE |
16227 | struct die_info *child_die; |
16228 | struct symbol *sym; | |
16229 | struct field *fields = NULL; | |
16230 | int num_fields = 0; | |
15d034d0 | 16231 | const char *name; |
9dc481d3 | 16232 | |
639d11d3 | 16233 | child_die = die->child; |
c906108c SS |
16234 | while (child_die && child_die->tag) |
16235 | { | |
16236 | if (child_die->tag != DW_TAG_enumerator) | |
16237 | { | |
e7c27a73 | 16238 | process_die (child_die, cu); |
c906108c SS |
16239 | } |
16240 | else | |
16241 | { | |
39cbfefa DJ |
16242 | name = dwarf2_name (child_die, cu); |
16243 | if (name) | |
c906108c | 16244 | { |
f792889a | 16245 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
16246 | |
16247 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
16248 | { | |
16249 | fields = (struct field *) | |
16250 | xrealloc (fields, | |
16251 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 16252 | * sizeof (struct field)); |
c906108c SS |
16253 | } |
16254 | ||
3567439c | 16255 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 16256 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 16257 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
16258 | FIELD_BITSIZE (fields[num_fields]) = 0; |
16259 | ||
16260 | num_fields++; | |
16261 | } | |
16262 | } | |
16263 | ||
16264 | child_die = sibling_die (child_die); | |
16265 | } | |
16266 | ||
16267 | if (num_fields) | |
16268 | { | |
f792889a DJ |
16269 | TYPE_NFIELDS (this_type) = num_fields; |
16270 | TYPE_FIELDS (this_type) = (struct field *) | |
16271 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
16272 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 16273 | sizeof (struct field) * num_fields); |
b8c9b27d | 16274 | xfree (fields); |
c906108c | 16275 | } |
c906108c | 16276 | } |
134d01f1 | 16277 | |
6c83ed52 TT |
16278 | /* If we are reading an enum from a .debug_types unit, and the enum |
16279 | is a declaration, and the enum is not the signatured type in the | |
16280 | unit, then we do not want to add a symbol for it. Adding a | |
16281 | symbol would in some cases obscure the true definition of the | |
16282 | enum, giving users an incomplete type when the definition is | |
16283 | actually available. Note that we do not want to do this for all | |
16284 | enums which are just declarations, because C++0x allows forward | |
16285 | enum declarations. */ | |
3019eac3 | 16286 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16287 | && die_is_declaration (die, cu)) |
16288 | { | |
52dc124a | 16289 | struct signatured_type *sig_type; |
6c83ed52 | 16290 | |
c0f78cd4 | 16291 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16292 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16293 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16294 | return; |
16295 | } | |
16296 | ||
f792889a | 16297 | new_symbol (die, this_type, cu); |
c906108c SS |
16298 | } |
16299 | ||
16300 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16301 | the DIE's type field. For now, this only handles one dimensional | |
16302 | arrays. */ | |
16303 | ||
f792889a | 16304 | static struct type * |
e7c27a73 | 16305 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16306 | { |
518817b3 | 16307 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16308 | struct die_info *child_die; |
7e314c57 | 16309 | struct type *type; |
c906108c | 16310 | struct type *element_type, *range_type, *index_type; |
c906108c | 16311 | struct attribute *attr; |
15d034d0 | 16312 | const char *name; |
a405673c | 16313 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16314 | unsigned int bit_stride = 0; |
c906108c | 16315 | |
e7c27a73 | 16316 | element_type = die_type (die, cu); |
c906108c | 16317 | |
7e314c57 JK |
16318 | /* The die_type call above may have already set the type for this DIE. */ |
16319 | type = get_die_type (die, cu); | |
16320 | if (type) | |
16321 | return type; | |
16322 | ||
dc53a7ad JB |
16323 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16324 | if (attr != NULL) | |
a405673c JB |
16325 | { |
16326 | int stride_ok; | |
16327 | ||
16328 | byte_stride_prop | |
16329 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
16330 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop); | |
16331 | if (!stride_ok) | |
16332 | { | |
b98664d3 | 16333 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16334 | " - DIE at %s [in module %s]"), |
16335 | sect_offset_str (die->sect_off), | |
518817b3 | 16336 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
16337 | /* Ignore this attribute. We will likely not be able to print |
16338 | arrays of this type correctly, but there is little we can do | |
16339 | to help if we cannot read the attribute's value. */ | |
16340 | byte_stride_prop = NULL; | |
16341 | } | |
16342 | } | |
dc53a7ad JB |
16343 | |
16344 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16345 | if (attr != NULL) | |
16346 | bit_stride = DW_UNSND (attr); | |
16347 | ||
c906108c SS |
16348 | /* Irix 6.2 native cc creates array types without children for |
16349 | arrays with unspecified length. */ | |
639d11d3 | 16350 | if (die->child == NULL) |
c906108c | 16351 | { |
46bf5051 | 16352 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16353 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16354 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16355 | byte_stride_prop, bit_stride); |
f792889a | 16356 | return set_die_type (die, type, cu); |
c906108c SS |
16357 | } |
16358 | ||
791afaa2 | 16359 | std::vector<struct type *> range_types; |
639d11d3 | 16360 | child_die = die->child; |
c906108c SS |
16361 | while (child_die && child_die->tag) |
16362 | { | |
16363 | if (child_die->tag == DW_TAG_subrange_type) | |
16364 | { | |
f792889a | 16365 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16366 | |
f792889a | 16367 | if (child_type != NULL) |
a02abb62 | 16368 | { |
0963b4bd MS |
16369 | /* The range type was succesfully read. Save it for the |
16370 | array type creation. */ | |
791afaa2 | 16371 | range_types.push_back (child_type); |
a02abb62 | 16372 | } |
c906108c SS |
16373 | } |
16374 | child_die = sibling_die (child_die); | |
16375 | } | |
16376 | ||
16377 | /* Dwarf2 dimensions are output from left to right, create the | |
16378 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16379 | |
c906108c | 16380 | type = element_type; |
7ca2d3a3 DL |
16381 | |
16382 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16383 | { | |
16384 | int i = 0; | |
9a619af0 | 16385 | |
791afaa2 | 16386 | while (i < range_types.size ()) |
dc53a7ad | 16387 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 16388 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
16389 | } |
16390 | else | |
16391 | { | |
791afaa2 | 16392 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16393 | while (ndim-- > 0) |
dc53a7ad | 16394 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 16395 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 16396 | } |
c906108c | 16397 | |
f5f8a009 EZ |
16398 | /* Understand Dwarf2 support for vector types (like they occur on |
16399 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16400 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16401 | custom vendor extension. The main difference between a regular | |
16402 | array and the vector variant is that vectors are passed by value | |
16403 | to functions. */ | |
e142c38c | 16404 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 16405 | if (attr) |
ea37ba09 | 16406 | make_vector_type (type); |
f5f8a009 | 16407 | |
dbc98a8b KW |
16408 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16409 | implementation may choose to implement triple vectors using this | |
16410 | attribute. */ | |
16411 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
16412 | if (attr) | |
16413 | { | |
16414 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16415 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16416 | else | |
b98664d3 | 16417 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16418 | "than the total size of elements")); |
dbc98a8b KW |
16419 | } |
16420 | ||
39cbfefa DJ |
16421 | name = dwarf2_name (die, cu); |
16422 | if (name) | |
16423 | TYPE_NAME (type) = name; | |
6e70227d | 16424 | |
2b4424c3 TT |
16425 | maybe_set_alignment (cu, die, type); |
16426 | ||
0963b4bd | 16427 | /* Install the type in the die. */ |
7e314c57 JK |
16428 | set_die_type (die, type, cu); |
16429 | ||
16430 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16431 | set_descriptive_type (type, die, cu); |
16432 | ||
7e314c57 | 16433 | return type; |
c906108c SS |
16434 | } |
16435 | ||
7ca2d3a3 | 16436 | static enum dwarf_array_dim_ordering |
6e70227d | 16437 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16438 | { |
16439 | struct attribute *attr; | |
16440 | ||
16441 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16442 | ||
aead7601 SM |
16443 | if (attr) |
16444 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 16445 | |
0963b4bd MS |
16446 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16447 | opposite order to the dwarf2 specification, but data is still | |
16448 | laid out as per normal fortran. | |
7ca2d3a3 | 16449 | |
0963b4bd MS |
16450 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16451 | version checking. */ | |
7ca2d3a3 | 16452 | |
905e0470 PM |
16453 | if (cu->language == language_fortran |
16454 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16455 | { |
16456 | return DW_ORD_row_major; | |
16457 | } | |
16458 | ||
6e70227d | 16459 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16460 | { |
16461 | case array_column_major: | |
16462 | return DW_ORD_col_major; | |
16463 | case array_row_major: | |
16464 | default: | |
16465 | return DW_ORD_row_major; | |
16466 | }; | |
16467 | } | |
16468 | ||
72019c9c | 16469 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16470 | the DIE's type field. */ |
72019c9c | 16471 | |
f792889a | 16472 | static struct type * |
72019c9c GM |
16473 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16474 | { | |
7e314c57 JK |
16475 | struct type *domain_type, *set_type; |
16476 | struct attribute *attr; | |
f792889a | 16477 | |
7e314c57 JK |
16478 | domain_type = die_type (die, cu); |
16479 | ||
16480 | /* The die_type call above may have already set the type for this DIE. */ | |
16481 | set_type = get_die_type (die, cu); | |
16482 | if (set_type) | |
16483 | return set_type; | |
16484 | ||
16485 | set_type = create_set_type (NULL, domain_type); | |
16486 | ||
16487 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
16488 | if (attr) |
16489 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 16490 | |
2b4424c3 TT |
16491 | maybe_set_alignment (cu, die, set_type); |
16492 | ||
f792889a | 16493 | return set_die_type (die, set_type, cu); |
72019c9c | 16494 | } |
7ca2d3a3 | 16495 | |
0971de02 TT |
16496 | /* A helper for read_common_block that creates a locexpr baton. |
16497 | SYM is the symbol which we are marking as computed. | |
16498 | COMMON_DIE is the DIE for the common block. | |
16499 | COMMON_LOC is the location expression attribute for the common | |
16500 | block itself. | |
16501 | MEMBER_LOC is the location expression attribute for the particular | |
16502 | member of the common block that we are processing. | |
16503 | CU is the CU from which the above come. */ | |
16504 | ||
16505 | static void | |
16506 | mark_common_block_symbol_computed (struct symbol *sym, | |
16507 | struct die_info *common_die, | |
16508 | struct attribute *common_loc, | |
16509 | struct attribute *member_loc, | |
16510 | struct dwarf2_cu *cu) | |
16511 | { | |
518817b3 SM |
16512 | struct dwarf2_per_objfile *dwarf2_per_objfile |
16513 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
16514 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
16515 | struct dwarf2_locexpr_baton *baton; | |
16516 | gdb_byte *ptr; | |
16517 | unsigned int cu_off; | |
16518 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
16519 | LONGEST offset = 0; | |
16520 | ||
16521 | gdb_assert (common_loc && member_loc); | |
16522 | gdb_assert (attr_form_is_block (common_loc)); | |
16523 | gdb_assert (attr_form_is_block (member_loc) | |
16524 | || attr_form_is_constant (member_loc)); | |
16525 | ||
8d749320 | 16526 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16527 | baton->per_cu = cu->per_cu; |
16528 | gdb_assert (baton->per_cu); | |
16529 | ||
16530 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16531 | ||
16532 | if (attr_form_is_constant (member_loc)) | |
16533 | { | |
16534 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
16535 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
16536 | } | |
16537 | else | |
16538 | baton->size += DW_BLOCK (member_loc)->size; | |
16539 | ||
224c3ddb | 16540 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16541 | baton->data = ptr; |
16542 | ||
16543 | *ptr++ = DW_OP_call4; | |
9c541725 | 16544 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16545 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16546 | ptr += 4; | |
16547 | ||
16548 | if (attr_form_is_constant (member_loc)) | |
16549 | { | |
16550 | *ptr++ = DW_OP_addr; | |
16551 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16552 | ptr += cu->header.addr_size; | |
16553 | } | |
16554 | else | |
16555 | { | |
16556 | /* We have to copy the data here, because DW_OP_call4 will only | |
16557 | use a DW_AT_location attribute. */ | |
16558 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16559 | ptr += DW_BLOCK (member_loc)->size; | |
16560 | } | |
16561 | ||
16562 | *ptr++ = DW_OP_plus; | |
16563 | gdb_assert (ptr - baton->data == baton->size); | |
16564 | ||
0971de02 | 16565 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16566 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16567 | } |
16568 | ||
4357ac6c TT |
16569 | /* Create appropriate locally-scoped variables for all the |
16570 | DW_TAG_common_block entries. Also create a struct common_block | |
16571 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
16572 | is used to sepate the common blocks name namespace from regular | |
16573 | variable names. */ | |
c906108c SS |
16574 | |
16575 | static void | |
e7c27a73 | 16576 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16577 | { |
0971de02 TT |
16578 | struct attribute *attr; |
16579 | ||
16580 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
16581 | if (attr) | |
16582 | { | |
16583 | /* Support the .debug_loc offsets. */ | |
16584 | if (attr_form_is_block (attr)) | |
16585 | { | |
16586 | /* Ok. */ | |
16587 | } | |
16588 | else if (attr_form_is_section_offset (attr)) | |
16589 | { | |
16590 | dwarf2_complex_location_expr_complaint (); | |
16591 | attr = NULL; | |
16592 | } | |
16593 | else | |
16594 | { | |
16595 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16596 | "common block member"); | |
16597 | attr = NULL; | |
16598 | } | |
16599 | } | |
16600 | ||
639d11d3 | 16601 | if (die->child != NULL) |
c906108c | 16602 | { |
518817b3 | 16603 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16604 | struct die_info *child_die; |
16605 | size_t n_entries = 0, size; | |
16606 | struct common_block *common_block; | |
16607 | struct symbol *sym; | |
74ac6d43 | 16608 | |
4357ac6c TT |
16609 | for (child_die = die->child; |
16610 | child_die && child_die->tag; | |
16611 | child_die = sibling_die (child_die)) | |
16612 | ++n_entries; | |
16613 | ||
16614 | size = (sizeof (struct common_block) | |
16615 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16616 | common_block |
16617 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16618 | size); | |
4357ac6c TT |
16619 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16620 | common_block->n_entries = 0; | |
16621 | ||
16622 | for (child_die = die->child; | |
16623 | child_die && child_die->tag; | |
16624 | child_die = sibling_die (child_die)) | |
16625 | { | |
16626 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16627 | symbol scope. */ | |
e7c27a73 | 16628 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16629 | if (sym != NULL) |
16630 | { | |
16631 | struct attribute *member_loc; | |
16632 | ||
16633 | common_block->contents[common_block->n_entries++] = sym; | |
16634 | ||
16635 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16636 | cu); | |
16637 | if (member_loc) | |
16638 | { | |
16639 | /* GDB has handled this for a long time, but it is | |
16640 | not specified by DWARF. It seems to have been | |
16641 | emitted by gfortran at least as recently as: | |
16642 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16643 | complaint (_("Variable in common block has " |
0971de02 | 16644 | "DW_AT_data_member_location " |
9d8780f0 SM |
16645 | "- DIE at %s [in module %s]"), |
16646 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16647 | objfile_name (objfile)); |
0971de02 TT |
16648 | |
16649 | if (attr_form_is_section_offset (member_loc)) | |
16650 | dwarf2_complex_location_expr_complaint (); | |
16651 | else if (attr_form_is_constant (member_loc) | |
16652 | || attr_form_is_block (member_loc)) | |
16653 | { | |
16654 | if (attr) | |
16655 | mark_common_block_symbol_computed (sym, die, attr, | |
16656 | member_loc, cu); | |
16657 | } | |
16658 | else | |
16659 | dwarf2_complex_location_expr_complaint (); | |
16660 | } | |
16661 | } | |
c906108c | 16662 | } |
4357ac6c TT |
16663 | |
16664 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16665 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16666 | } |
16667 | } | |
16668 | ||
0114d602 | 16669 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16670 | |
0114d602 DJ |
16671 | static struct type * |
16672 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16673 | { |
518817b3 | 16674 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16675 | const char *previous_prefix, *name; |
9219021c | 16676 | int is_anonymous; |
0114d602 DJ |
16677 | struct type *type; |
16678 | ||
16679 | /* For extensions, reuse the type of the original namespace. */ | |
16680 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16681 | { | |
16682 | struct die_info *ext_die; | |
16683 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16684 | |
0114d602 DJ |
16685 | ext_die = dwarf2_extension (die, &ext_cu); |
16686 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16687 | |
16688 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16689 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16690 | return set_die_type (die, type, cu); |
16691 | } | |
9219021c | 16692 | |
e142c38c | 16693 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16694 | |
16695 | /* Now build the name of the current namespace. */ | |
16696 | ||
0114d602 DJ |
16697 | previous_prefix = determine_prefix (die, cu); |
16698 | if (previous_prefix[0] != '\0') | |
16699 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16700 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16701 | |
16702 | /* Create the type. */ | |
19f392bc | 16703 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16704 | |
60531b24 | 16705 | return set_die_type (die, type, cu); |
0114d602 DJ |
16706 | } |
16707 | ||
22cee43f | 16708 | /* Read a namespace scope. */ |
0114d602 DJ |
16709 | |
16710 | static void | |
16711 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16712 | { | |
518817b3 | 16713 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16714 | int is_anonymous; |
9219021c | 16715 | |
5c4e30ca DC |
16716 | /* Add a symbol associated to this if we haven't seen the namespace |
16717 | before. Also, add a using directive if it's an anonymous | |
16718 | namespace. */ | |
9219021c | 16719 | |
f2f0e013 | 16720 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16721 | { |
16722 | struct type *type; | |
16723 | ||
0114d602 | 16724 | type = read_type_die (die, cu); |
e7c27a73 | 16725 | new_symbol (die, type, cu); |
5c4e30ca | 16726 | |
e8e80198 | 16727 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16728 | if (is_anonymous) |
0114d602 DJ |
16729 | { |
16730 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16731 | |
eb1e02fd | 16732 | std::vector<const char *> excludes; |
804d2729 | 16733 | add_using_directive (using_directives (cu), |
22cee43f | 16734 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16735 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16736 | } |
5c4e30ca | 16737 | } |
9219021c | 16738 | |
639d11d3 | 16739 | if (die->child != NULL) |
d9fa45fe | 16740 | { |
639d11d3 | 16741 | struct die_info *child_die = die->child; |
6e70227d | 16742 | |
d9fa45fe DC |
16743 | while (child_die && child_die->tag) |
16744 | { | |
e7c27a73 | 16745 | process_die (child_die, cu); |
d9fa45fe DC |
16746 | child_die = sibling_die (child_die); |
16747 | } | |
16748 | } | |
38d518c9 EZ |
16749 | } |
16750 | ||
f55ee35c JK |
16751 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16752 | imported module. Still we need that type as local Fortran "use ... only" | |
16753 | declaration imports depend on the created type in determine_prefix. */ | |
16754 | ||
16755 | static struct type * | |
16756 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16757 | { | |
518817b3 | 16758 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16759 | const char *module_name; |
f55ee35c JK |
16760 | struct type *type; |
16761 | ||
16762 | module_name = dwarf2_name (die, cu); | |
16763 | if (!module_name) | |
b98664d3 | 16764 | complaint (_("DW_TAG_module has no name, offset %s"), |
9d8780f0 | 16765 | sect_offset_str (die->sect_off)); |
19f392bc | 16766 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16767 | |
f55ee35c JK |
16768 | return set_die_type (die, type, cu); |
16769 | } | |
16770 | ||
5d7cb8df JK |
16771 | /* Read a Fortran module. */ |
16772 | ||
16773 | static void | |
16774 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16775 | { | |
16776 | struct die_info *child_die = die->child; | |
530e8392 KB |
16777 | struct type *type; |
16778 | ||
16779 | type = read_type_die (die, cu); | |
16780 | new_symbol (die, type, cu); | |
5d7cb8df | 16781 | |
5d7cb8df JK |
16782 | while (child_die && child_die->tag) |
16783 | { | |
16784 | process_die (child_die, cu); | |
16785 | child_die = sibling_die (child_die); | |
16786 | } | |
16787 | } | |
16788 | ||
38d518c9 EZ |
16789 | /* Return the name of the namespace represented by DIE. Set |
16790 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16791 | namespace. */ | |
16792 | ||
16793 | static const char * | |
e142c38c | 16794 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16795 | { |
16796 | struct die_info *current_die; | |
16797 | const char *name = NULL; | |
16798 | ||
16799 | /* Loop through the extensions until we find a name. */ | |
16800 | ||
16801 | for (current_die = die; | |
16802 | current_die != NULL; | |
f2f0e013 | 16803 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16804 | { |
96553a0c DE |
16805 | /* We don't use dwarf2_name here so that we can detect the absence |
16806 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16807 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16808 | |
38d518c9 EZ |
16809 | if (name != NULL) |
16810 | break; | |
16811 | } | |
16812 | ||
16813 | /* Is it an anonymous namespace? */ | |
16814 | ||
16815 | *is_anonymous = (name == NULL); | |
16816 | if (*is_anonymous) | |
2b1dbab0 | 16817 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16818 | |
16819 | return name; | |
d9fa45fe DC |
16820 | } |
16821 | ||
c906108c SS |
16822 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16823 | the user defined type vector. */ | |
16824 | ||
f792889a | 16825 | static struct type * |
e7c27a73 | 16826 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16827 | { |
518817b3 SM |
16828 | struct gdbarch *gdbarch |
16829 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 16830 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16831 | struct type *type; |
8b2dbe47 KB |
16832 | struct attribute *attr_byte_size; |
16833 | struct attribute *attr_address_class; | |
16834 | int byte_size, addr_class; | |
7e314c57 JK |
16835 | struct type *target_type; |
16836 | ||
16837 | target_type = die_type (die, cu); | |
c906108c | 16838 | |
7e314c57 JK |
16839 | /* The die_type call above may have already set the type for this DIE. */ |
16840 | type = get_die_type (die, cu); | |
16841 | if (type) | |
16842 | return type; | |
16843 | ||
16844 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16845 | |
e142c38c | 16846 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16847 | if (attr_byte_size) |
16848 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16849 | else |
8b2dbe47 KB |
16850 | byte_size = cu_header->addr_size; |
16851 | ||
e142c38c | 16852 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16853 | if (attr_address_class) |
16854 | addr_class = DW_UNSND (attr_address_class); | |
16855 | else | |
16856 | addr_class = DW_ADDR_none; | |
16857 | ||
2b4424c3 TT |
16858 | ULONGEST alignment = get_alignment (cu, die); |
16859 | ||
16860 | /* If the pointer size, alignment, or address class is different | |
16861 | than the default, create a type variant marked as such and set | |
16862 | the length accordingly. */ | |
16863 | if (TYPE_LENGTH (type) != byte_size | |
16864 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16865 | && alignment != TYPE_RAW_ALIGN (type)) | |
16866 | || addr_class != DW_ADDR_none) | |
c906108c | 16867 | { |
5e2b427d | 16868 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16869 | { |
16870 | int type_flags; | |
16871 | ||
849957d9 | 16872 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16873 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16874 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16875 | == 0); | |
8b2dbe47 KB |
16876 | type = make_type_with_address_space (type, type_flags); |
16877 | } | |
16878 | else if (TYPE_LENGTH (type) != byte_size) | |
16879 | { | |
b98664d3 | 16880 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 16881 | } |
2b4424c3 TT |
16882 | else if (TYPE_RAW_ALIGN (type) != alignment) |
16883 | { | |
b98664d3 | 16884 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
16885 | " - DIE at %s [in module %s]"), |
16886 | sect_offset_str (die->sect_off), | |
16887 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16888 | } | |
6e70227d | 16889 | else |
9a619af0 MS |
16890 | { |
16891 | /* Should we also complain about unhandled address classes? */ | |
16892 | } | |
c906108c | 16893 | } |
8b2dbe47 KB |
16894 | |
16895 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 16896 | set_type_align (type, alignment); |
f792889a | 16897 | return set_die_type (die, type, cu); |
c906108c SS |
16898 | } |
16899 | ||
16900 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16901 | the user defined type vector. */ | |
16902 | ||
f792889a | 16903 | static struct type * |
e7c27a73 | 16904 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16905 | { |
16906 | struct type *type; | |
16907 | struct type *to_type; | |
16908 | struct type *domain; | |
16909 | ||
e7c27a73 DJ |
16910 | to_type = die_type (die, cu); |
16911 | domain = die_containing_type (die, cu); | |
0d5de010 | 16912 | |
7e314c57 JK |
16913 | /* The calls above may have already set the type for this DIE. */ |
16914 | type = get_die_type (die, cu); | |
16915 | if (type) | |
16916 | return type; | |
16917 | ||
0d5de010 DJ |
16918 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
16919 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
16920 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
16921 | { | |
518817b3 SM |
16922 | struct type *new_type |
16923 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
16924 | |
16925 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16926 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16927 | TYPE_VARARGS (to_type)); | |
16928 | type = lookup_methodptr_type (new_type); | |
16929 | } | |
0d5de010 DJ |
16930 | else |
16931 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16932 | |
f792889a | 16933 | return set_die_type (die, type, cu); |
c906108c SS |
16934 | } |
16935 | ||
4297a3f0 | 16936 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16937 | the user defined type vector. */ |
16938 | ||
f792889a | 16939 | static struct type * |
4297a3f0 AV |
16940 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16941 | enum type_code refcode) | |
c906108c | 16942 | { |
e7c27a73 | 16943 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16944 | struct type *type, *target_type; |
c906108c SS |
16945 | struct attribute *attr; |
16946 | ||
4297a3f0 AV |
16947 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16948 | ||
7e314c57 JK |
16949 | target_type = die_type (die, cu); |
16950 | ||
16951 | /* The die_type call above may have already set the type for this DIE. */ | |
16952 | type = get_die_type (die, cu); | |
16953 | if (type) | |
16954 | return type; | |
16955 | ||
4297a3f0 | 16956 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16957 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16958 | if (attr) |
16959 | { | |
16960 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16961 | } | |
16962 | else | |
16963 | { | |
107d2387 | 16964 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16965 | } |
2b4424c3 | 16966 | maybe_set_alignment (cu, die, type); |
f792889a | 16967 | return set_die_type (die, type, cu); |
c906108c SS |
16968 | } |
16969 | ||
cf363f18 MW |
16970 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16971 | outputs DWARF type qualifiers that apply to an array, not the | |
16972 | element type. But GDB relies on the array element type to carry | |
16973 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16974 | specification. */ | |
16975 | ||
16976 | static struct type * | |
16977 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16978 | struct type *base_type, int cnst, int voltl) | |
16979 | { | |
16980 | struct type *el_type, *inner_array; | |
16981 | ||
16982 | base_type = copy_type (base_type); | |
16983 | inner_array = base_type; | |
16984 | ||
16985 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
16986 | { | |
16987 | TYPE_TARGET_TYPE (inner_array) = | |
16988 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16989 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16990 | } | |
16991 | ||
16992 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16993 | cnst |= TYPE_CONST (el_type); | |
16994 | voltl |= TYPE_VOLATILE (el_type); | |
16995 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16996 | ||
16997 | return set_die_type (die, base_type, cu); | |
16998 | } | |
16999 | ||
f792889a | 17000 | static struct type * |
e7c27a73 | 17001 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17002 | { |
f792889a | 17003 | struct type *base_type, *cv_type; |
c906108c | 17004 | |
e7c27a73 | 17005 | base_type = die_type (die, cu); |
7e314c57 JK |
17006 | |
17007 | /* The die_type call above may have already set the type for this DIE. */ | |
17008 | cv_type = get_die_type (die, cu); | |
17009 | if (cv_type) | |
17010 | return cv_type; | |
17011 | ||
2f608a3a KW |
17012 | /* In case the const qualifier is applied to an array type, the element type |
17013 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
17014 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 17015 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17016 | |
f792889a DJ |
17017 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17018 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17019 | } |
17020 | ||
f792889a | 17021 | static struct type * |
e7c27a73 | 17022 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17023 | { |
f792889a | 17024 | struct type *base_type, *cv_type; |
c906108c | 17025 | |
e7c27a73 | 17026 | base_type = die_type (die, cu); |
7e314c57 JK |
17027 | |
17028 | /* The die_type call above may have already set the type for this DIE. */ | |
17029 | cv_type = get_die_type (die, cu); | |
17030 | if (cv_type) | |
17031 | return cv_type; | |
17032 | ||
cf363f18 MW |
17033 | /* In case the volatile qualifier is applied to an array type, the |
17034 | element type is so qualified, not the array type (section 6.7.3 | |
17035 | of C99). */ | |
17036 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
17037 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
17038 | ||
f792889a DJ |
17039 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17040 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17041 | } |
17042 | ||
06d66ee9 TT |
17043 | /* Handle DW_TAG_restrict_type. */ |
17044 | ||
17045 | static struct type * | |
17046 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17047 | { | |
17048 | struct type *base_type, *cv_type; | |
17049 | ||
17050 | base_type = die_type (die, cu); | |
17051 | ||
17052 | /* The die_type call above may have already set the type for this DIE. */ | |
17053 | cv_type = get_die_type (die, cu); | |
17054 | if (cv_type) | |
17055 | return cv_type; | |
17056 | ||
17057 | cv_type = make_restrict_type (base_type); | |
17058 | return set_die_type (die, cv_type, cu); | |
17059 | } | |
17060 | ||
a2c2acaf MW |
17061 | /* Handle DW_TAG_atomic_type. */ |
17062 | ||
17063 | static struct type * | |
17064 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17065 | { | |
17066 | struct type *base_type, *cv_type; | |
17067 | ||
17068 | base_type = die_type (die, cu); | |
17069 | ||
17070 | /* The die_type call above may have already set the type for this DIE. */ | |
17071 | cv_type = get_die_type (die, cu); | |
17072 | if (cv_type) | |
17073 | return cv_type; | |
17074 | ||
17075 | cv_type = make_atomic_type (base_type); | |
17076 | return set_die_type (die, cv_type, cu); | |
17077 | } | |
17078 | ||
c906108c SS |
17079 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17080 | the user defined type vector. It isn't really a user defined type, | |
17081 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17082 | attribute to reference it. */ | |
17083 | ||
f792889a | 17084 | static struct type * |
e7c27a73 | 17085 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17086 | { |
518817b3 | 17087 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 17088 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
17089 | struct type *type, *range_type, *index_type, *char_type; |
17090 | struct attribute *attr; | |
17091 | unsigned int length; | |
17092 | ||
e142c38c | 17093 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
17094 | if (attr) |
17095 | { | |
17096 | length = DW_UNSND (attr); | |
17097 | } | |
17098 | else | |
17099 | { | |
0963b4bd | 17100 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 17101 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
17102 | if (attr) |
17103 | { | |
17104 | length = DW_UNSND (attr); | |
17105 | } | |
17106 | else | |
17107 | { | |
17108 | length = 1; | |
17109 | } | |
c906108c | 17110 | } |
6ccb9162 | 17111 | |
46bf5051 | 17112 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 17113 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
17114 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17115 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17116 | |
f792889a | 17117 | return set_die_type (die, type, cu); |
c906108c SS |
17118 | } |
17119 | ||
4d804846 JB |
17120 | /* Assuming that DIE corresponds to a function, returns nonzero |
17121 | if the function is prototyped. */ | |
17122 | ||
17123 | static int | |
17124 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17125 | { | |
17126 | struct attribute *attr; | |
17127 | ||
17128 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
17129 | if (attr && (DW_UNSND (attr) != 0)) | |
17130 | return 1; | |
17131 | ||
17132 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
17133 | is only meaninful for C, but the concept also extends to other | |
17134 | languages that allow unprototyped functions (Eg: Objective C). | |
17135 | For all other languages, assume that functions are always | |
17136 | prototyped. */ | |
17137 | if (cu->language != language_c | |
17138 | && cu->language != language_objc | |
17139 | && cu->language != language_opencl) | |
17140 | return 1; | |
17141 | ||
17142 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17143 | prototyped and unprototyped functions; default to prototyped, | |
17144 | since that is more common in modern code (and RealView warns | |
17145 | about unprototyped functions). */ | |
17146 | if (producer_is_realview (cu->producer)) | |
17147 | return 1; | |
17148 | ||
17149 | return 0; | |
17150 | } | |
17151 | ||
c906108c SS |
17152 | /* Handle DIES due to C code like: |
17153 | ||
17154 | struct foo | |
c5aa993b JM |
17155 | { |
17156 | int (*funcp)(int a, long l); | |
17157 | int b; | |
17158 | }; | |
c906108c | 17159 | |
0963b4bd | 17160 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17161 | |
f792889a | 17162 | static struct type * |
e7c27a73 | 17163 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17164 | { |
518817b3 | 17165 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
17166 | struct type *type; /* Type that this function returns. */ |
17167 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17168 | struct attribute *attr; |
17169 | ||
e7c27a73 | 17170 | type = die_type (die, cu); |
7e314c57 JK |
17171 | |
17172 | /* The die_type call above may have already set the type for this DIE. */ | |
17173 | ftype = get_die_type (die, cu); | |
17174 | if (ftype) | |
17175 | return ftype; | |
17176 | ||
0c8b41f1 | 17177 | ftype = lookup_function_type (type); |
c906108c | 17178 | |
4d804846 | 17179 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17180 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17181 | |
c055b101 CV |
17182 | /* Store the calling convention in the type if it's available in |
17183 | the subroutine die. Otherwise set the calling convention to | |
17184 | the default value DW_CC_normal. */ | |
17185 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
17186 | if (attr) |
17187 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
17188 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
17189 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17190 | else | |
17191 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17192 | |
743649fd MW |
17193 | /* Record whether the function returns normally to its caller or not |
17194 | if the DWARF producer set that information. */ | |
17195 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17196 | if (attr && (DW_UNSND (attr) != 0)) | |
17197 | TYPE_NO_RETURN (ftype) = 1; | |
17198 | ||
76c10ea2 GM |
17199 | /* We need to add the subroutine type to the die immediately so |
17200 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17201 | declared as the same subroutine type. */ |
76c10ea2 | 17202 | set_die_type (die, ftype, cu); |
6e70227d | 17203 | |
639d11d3 | 17204 | if (die->child != NULL) |
c906108c | 17205 | { |
bb5ed363 | 17206 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17207 | struct die_info *child_die; |
8072405b | 17208 | int nparams, iparams; |
c906108c SS |
17209 | |
17210 | /* Count the number of parameters. | |
17211 | FIXME: GDB currently ignores vararg functions, but knows about | |
17212 | vararg member functions. */ | |
8072405b | 17213 | nparams = 0; |
639d11d3 | 17214 | child_die = die->child; |
c906108c SS |
17215 | while (child_die && child_die->tag) |
17216 | { | |
17217 | if (child_die->tag == DW_TAG_formal_parameter) | |
17218 | nparams++; | |
17219 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17220 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
17221 | child_die = sibling_die (child_die); |
17222 | } | |
17223 | ||
17224 | /* Allocate storage for parameters and fill them in. */ | |
17225 | TYPE_NFIELDS (ftype) = nparams; | |
17226 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17227 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17228 | |
8072405b JK |
17229 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17230 | even if we error out during the parameters reading below. */ | |
17231 | for (iparams = 0; iparams < nparams; iparams++) | |
17232 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17233 | ||
17234 | iparams = 0; | |
639d11d3 | 17235 | child_die = die->child; |
c906108c SS |
17236 | while (child_die && child_die->tag) |
17237 | { | |
17238 | if (child_die->tag == DW_TAG_formal_parameter) | |
17239 | { | |
3ce3b1ba PA |
17240 | struct type *arg_type; |
17241 | ||
17242 | /* DWARF version 2 has no clean way to discern C++ | |
17243 | static and non-static member functions. G++ helps | |
17244 | GDB by marking the first parameter for non-static | |
17245 | member functions (which is the this pointer) as | |
17246 | artificial. We pass this information to | |
17247 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17248 | ||
17249 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17250 | 4.5 does not yet generate. */ | |
e142c38c | 17251 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
17252 | if (attr) |
17253 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
17254 | else | |
9c37b5ae | 17255 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17256 | arg_type = die_type (child_die, cu); |
17257 | ||
17258 | /* RealView does not mark THIS as const, which the testsuite | |
17259 | expects. GCC marks THIS as const in method definitions, | |
17260 | but not in the class specifications (GCC PR 43053). */ | |
17261 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17262 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17263 | { | |
17264 | int is_this = 0; | |
17265 | struct dwarf2_cu *arg_cu = cu; | |
17266 | const char *name = dwarf2_name (child_die, cu); | |
17267 | ||
17268 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
17269 | if (attr) | |
17270 | { | |
17271 | /* If the compiler emits this, use it. */ | |
17272 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17273 | is_this = 1; | |
17274 | } | |
17275 | else if (name && strcmp (name, "this") == 0) | |
17276 | /* Function definitions will have the argument names. */ | |
17277 | is_this = 1; | |
17278 | else if (name == NULL && iparams == 0) | |
17279 | /* Declarations may not have the names, so like | |
17280 | elsewhere in GDB, assume an artificial first | |
17281 | argument is "this". */ | |
17282 | is_this = 1; | |
17283 | ||
17284 | if (is_this) | |
17285 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17286 | arg_type, 0); | |
17287 | } | |
17288 | ||
17289 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17290 | iparams++; |
17291 | } | |
17292 | child_die = sibling_die (child_die); | |
17293 | } | |
17294 | } | |
17295 | ||
76c10ea2 | 17296 | return ftype; |
c906108c SS |
17297 | } |
17298 | ||
f792889a | 17299 | static struct type * |
e7c27a73 | 17300 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17301 | { |
518817b3 | 17302 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17303 | const char *name = NULL; |
3c8e0968 | 17304 | struct type *this_type, *target_type; |
c906108c | 17305 | |
94af9270 | 17306 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17307 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17308 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17309 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17310 | target_type = die_type (die, cu); |
17311 | if (target_type != this_type) | |
17312 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17313 | else | |
17314 | { | |
17315 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17316 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17317 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17318 | "- DIE at %s [in module %s]"), |
17319 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17320 | TYPE_TARGET_TYPE (this_type) = NULL; |
17321 | } | |
f792889a | 17322 | return this_type; |
c906108c SS |
17323 | } |
17324 | ||
9b790ce7 UW |
17325 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17326 | (which may be different from NAME) to the architecture back-end to allow | |
17327 | it to guess the correct format if necessary. */ | |
17328 | ||
17329 | static struct type * | |
17330 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
17331 | const char *name_hint) | |
17332 | { | |
17333 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17334 | const struct floatformat **format; | |
17335 | struct type *type; | |
17336 | ||
17337 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17338 | if (format) | |
17339 | type = init_float_type (objfile, bits, name, format); | |
17340 | else | |
77b7c781 | 17341 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17342 | |
17343 | return type; | |
17344 | } | |
17345 | ||
c906108c SS |
17346 | /* Find a representation of a given base type and install |
17347 | it in the TYPE field of the die. */ | |
17348 | ||
f792889a | 17349 | static struct type * |
e7c27a73 | 17350 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17351 | { |
518817b3 | 17352 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
17353 | struct type *type; |
17354 | struct attribute *attr; | |
19f392bc | 17355 | int encoding = 0, bits = 0; |
15d034d0 | 17356 | const char *name; |
c906108c | 17357 | |
e142c38c | 17358 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
17359 | if (attr) |
17360 | { | |
17361 | encoding = DW_UNSND (attr); | |
17362 | } | |
e142c38c | 17363 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17364 | if (attr) |
17365 | { | |
19f392bc | 17366 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 17367 | } |
39cbfefa | 17368 | name = dwarf2_name (die, cu); |
6ccb9162 | 17369 | if (!name) |
c906108c | 17370 | { |
b98664d3 | 17371 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
c906108c | 17372 | } |
6ccb9162 UW |
17373 | |
17374 | switch (encoding) | |
c906108c | 17375 | { |
6ccb9162 UW |
17376 | case DW_ATE_address: |
17377 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17378 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17379 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17380 | break; |
17381 | case DW_ATE_boolean: | |
19f392bc | 17382 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17383 | break; |
17384 | case DW_ATE_complex_float: | |
9b790ce7 | 17385 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 17386 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
17387 | break; |
17388 | case DW_ATE_decimal_float: | |
19f392bc | 17389 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17390 | break; |
17391 | case DW_ATE_float: | |
9b790ce7 | 17392 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
17393 | break; |
17394 | case DW_ATE_signed: | |
19f392bc | 17395 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
17396 | break; |
17397 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17398 | if (cu->language == language_fortran |
17399 | && name | |
61012eef | 17400 | && startswith (name, "character(")) |
19f392bc UW |
17401 | type = init_character_type (objfile, bits, 1, name); |
17402 | else | |
17403 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
17404 | break; |
17405 | case DW_ATE_signed_char: | |
6e70227d | 17406 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17407 | || cu->language == language_pascal |
17408 | || cu->language == language_fortran) | |
19f392bc UW |
17409 | type = init_character_type (objfile, bits, 0, name); |
17410 | else | |
17411 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
17412 | break; |
17413 | case DW_ATE_unsigned_char: | |
868a0084 | 17414 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17415 | || cu->language == language_pascal |
c44af4eb TT |
17416 | || cu->language == language_fortran |
17417 | || cu->language == language_rust) | |
19f392bc UW |
17418 | type = init_character_type (objfile, bits, 1, name); |
17419 | else | |
17420 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 17421 | break; |
75079b2b | 17422 | case DW_ATE_UTF: |
53e710ac PA |
17423 | { |
17424 | gdbarch *arch = get_objfile_arch (objfile); | |
17425 | ||
17426 | if (bits == 16) | |
17427 | type = builtin_type (arch)->builtin_char16; | |
17428 | else if (bits == 32) | |
17429 | type = builtin_type (arch)->builtin_char32; | |
17430 | else | |
17431 | { | |
b98664d3 | 17432 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac PA |
17433 | bits); |
17434 | type = init_integer_type (objfile, bits, 1, name); | |
17435 | } | |
17436 | return set_die_type (die, type, cu); | |
17437 | } | |
75079b2b TT |
17438 | break; |
17439 | ||
6ccb9162 | 17440 | default: |
b98664d3 | 17441 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17442 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17443 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17444 | break; |
c906108c | 17445 | } |
6ccb9162 | 17446 | |
0114d602 | 17447 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17448 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17449 | |
2b4424c3 TT |
17450 | maybe_set_alignment (cu, die, type); |
17451 | ||
f792889a | 17452 | return set_die_type (die, type, cu); |
c906108c SS |
17453 | } |
17454 | ||
80180f79 SA |
17455 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17456 | resulting value of the attribute into struct bound_prop. | |
17457 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17458 | ||
17459 | static int | |
17460 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
17461 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
17462 | { | |
17463 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17464 | struct obstack *obstack |
17465 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 SA |
17466 | |
17467 | if (attr == NULL || prop == NULL) | |
17468 | return 0; | |
17469 | ||
17470 | if (attr_form_is_block (attr)) | |
17471 | { | |
8d749320 | 17472 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
17473 | baton->referenced_type = NULL; |
17474 | baton->locexpr.per_cu = cu->per_cu; | |
17475 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17476 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
17477 | prop->data.baton = baton; | |
17478 | prop->kind = PROP_LOCEXPR; | |
17479 | gdb_assert (prop->data.baton != NULL); | |
17480 | } | |
17481 | else if (attr_form_is_ref (attr)) | |
17482 | { | |
17483 | struct dwarf2_cu *target_cu = cu; | |
17484 | struct die_info *target_die; | |
17485 | struct attribute *target_attr; | |
17486 | ||
17487 | target_die = follow_die_ref (die, attr, &target_cu); | |
17488 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17489 | if (target_attr == NULL) |
17490 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17491 | target_cu); | |
80180f79 SA |
17492 | if (target_attr == NULL) |
17493 | return 0; | |
17494 | ||
df25ebbd | 17495 | switch (target_attr->name) |
80180f79 | 17496 | { |
df25ebbd JB |
17497 | case DW_AT_location: |
17498 | if (attr_form_is_section_offset (target_attr)) | |
17499 | { | |
8d749320 | 17500 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
17501 | baton->referenced_type = die_type (target_die, target_cu); |
17502 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
17503 | prop->data.baton = baton; | |
17504 | prop->kind = PROP_LOCLIST; | |
17505 | gdb_assert (prop->data.baton != NULL); | |
17506 | } | |
17507 | else if (attr_form_is_block (target_attr)) | |
17508 | { | |
8d749320 | 17509 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
17510 | baton->referenced_type = die_type (target_die, target_cu); |
17511 | baton->locexpr.per_cu = cu->per_cu; | |
17512 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17513 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
17514 | prop->data.baton = baton; | |
17515 | prop->kind = PROP_LOCEXPR; | |
17516 | gdb_assert (prop->data.baton != NULL); | |
17517 | } | |
17518 | else | |
17519 | { | |
17520 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17521 | "dynamic property"); | |
17522 | return 0; | |
17523 | } | |
17524 | break; | |
17525 | case DW_AT_data_member_location: | |
17526 | { | |
17527 | LONGEST offset; | |
17528 | ||
17529 | if (!handle_data_member_location (target_die, target_cu, | |
17530 | &offset)) | |
17531 | return 0; | |
17532 | ||
8d749320 | 17533 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
17534 | baton->referenced_type = read_type_die (target_die->parent, |
17535 | target_cu); | |
df25ebbd JB |
17536 | baton->offset_info.offset = offset; |
17537 | baton->offset_info.type = die_type (target_die, target_cu); | |
17538 | prop->data.baton = baton; | |
17539 | prop->kind = PROP_ADDR_OFFSET; | |
17540 | break; | |
17541 | } | |
80180f79 SA |
17542 | } |
17543 | } | |
17544 | else if (attr_form_is_constant (attr)) | |
17545 | { | |
17546 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17547 | prop->kind = PROP_CONST; | |
17548 | } | |
17549 | else | |
17550 | { | |
17551 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17552 | dwarf2_name (die, cu)); | |
17553 | return 0; | |
17554 | } | |
17555 | ||
17556 | return 1; | |
17557 | } | |
17558 | ||
a02abb62 JB |
17559 | /* Read the given DW_AT_subrange DIE. */ |
17560 | ||
f792889a | 17561 | static struct type * |
a02abb62 JB |
17562 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17563 | { | |
4c9ad8c2 | 17564 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17565 | struct type *range_type; |
17566 | struct attribute *attr; | |
729efb13 | 17567 | struct dynamic_prop low, high; |
4fae6e18 | 17568 | int low_default_is_valid; |
c451ebe5 | 17569 | int high_bound_is_count = 0; |
15d034d0 | 17570 | const char *name; |
43bbcdc2 | 17571 | LONGEST negative_mask; |
e77813c8 | 17572 | |
4c9ad8c2 TT |
17573 | orig_base_type = die_type (die, cu); |
17574 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
17575 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17576 | creating the range type, but we use the result of check_typedef | |
17577 | when examining properties of the type. */ | |
17578 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17579 | |
7e314c57 JK |
17580 | /* The die_type call above may have already set the type for this DIE. */ |
17581 | range_type = get_die_type (die, cu); | |
17582 | if (range_type) | |
17583 | return range_type; | |
17584 | ||
729efb13 SA |
17585 | low.kind = PROP_CONST; |
17586 | high.kind = PROP_CONST; | |
17587 | high.data.const_val = 0; | |
17588 | ||
4fae6e18 JK |
17589 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17590 | omitting DW_AT_lower_bound. */ | |
17591 | switch (cu->language) | |
6e70227d | 17592 | { |
4fae6e18 JK |
17593 | case language_c: |
17594 | case language_cplus: | |
729efb13 | 17595 | low.data.const_val = 0; |
4fae6e18 JK |
17596 | low_default_is_valid = 1; |
17597 | break; | |
17598 | case language_fortran: | |
729efb13 | 17599 | low.data.const_val = 1; |
4fae6e18 JK |
17600 | low_default_is_valid = 1; |
17601 | break; | |
17602 | case language_d: | |
4fae6e18 | 17603 | case language_objc: |
c44af4eb | 17604 | case language_rust: |
729efb13 | 17605 | low.data.const_val = 0; |
4fae6e18 JK |
17606 | low_default_is_valid = (cu->header.version >= 4); |
17607 | break; | |
17608 | case language_ada: | |
17609 | case language_m2: | |
17610 | case language_pascal: | |
729efb13 | 17611 | low.data.const_val = 1; |
4fae6e18 JK |
17612 | low_default_is_valid = (cu->header.version >= 4); |
17613 | break; | |
17614 | default: | |
729efb13 | 17615 | low.data.const_val = 0; |
4fae6e18 JK |
17616 | low_default_is_valid = 0; |
17617 | break; | |
a02abb62 JB |
17618 | } |
17619 | ||
e142c38c | 17620 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 17621 | if (attr) |
11c1ba78 | 17622 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 | 17623 | else if (!low_default_is_valid) |
b98664d3 | 17624 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17625 | "- DIE at %s [in module %s]"), |
17626 | sect_offset_str (die->sect_off), | |
518817b3 | 17627 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17628 | |
e142c38c | 17629 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 17630 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
17631 | { |
17632 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 17633 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 17634 | { |
c451ebe5 SA |
17635 | /* If bounds are constant do the final calculation here. */ |
17636 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17637 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17638 | else | |
17639 | high_bound_is_count = 1; | |
c2ff108b | 17640 | } |
e77813c8 PM |
17641 | } |
17642 | ||
17643 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17644 | without specifying a base type. | |
17645 | In that case, the base type must be set to the type of | |
17646 | the lower bound, upper bound or count, in that order, if any of these | |
17647 | three attributes references an object that has a type. | |
17648 | If no base type is found, the Dwarf-2 specifications say that | |
17649 | a signed integer type of size equal to the size of an address should | |
17650 | be used. | |
17651 | For the following C code: `extern char gdb_int [];' | |
17652 | GCC produces an empty range DIE. | |
17653 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 17654 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
17655 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
17656 | { | |
518817b3 | 17657 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e77813c8 PM |
17658 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
17659 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
17660 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
17661 | ||
17662 | /* Test "int", "long int", and "long long int" objfile types, | |
17663 | and select the first one having a size above or equal to the | |
17664 | architecture address size. */ | |
17665 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17666 | base_type = int_type; | |
17667 | else | |
17668 | { | |
17669 | int_type = objfile_type (objfile)->builtin_long; | |
17670 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17671 | base_type = int_type; | |
17672 | else | |
17673 | { | |
17674 | int_type = objfile_type (objfile)->builtin_long_long; | |
17675 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17676 | base_type = int_type; | |
17677 | } | |
17678 | } | |
17679 | } | |
a02abb62 | 17680 | |
dbb9c2b1 JB |
17681 | /* Normally, the DWARF producers are expected to use a signed |
17682 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17683 | But this is unfortunately not always the case, as witnessed | |
17684 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17685 | is used instead. To work around that ambiguity, we treat | |
17686 | the bounds as signed, and thus sign-extend their values, when | |
17687 | the base type is signed. */ | |
6e70227d | 17688 | negative_mask = |
66c6502d | 17689 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17690 | if (low.kind == PROP_CONST |
17691 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17692 | low.data.const_val |= negative_mask; | |
17693 | if (high.kind == PROP_CONST | |
17694 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17695 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17696 | |
729efb13 | 17697 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 17698 | |
c451ebe5 SA |
17699 | if (high_bound_is_count) |
17700 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17701 | ||
c2ff108b JK |
17702 | /* Ada expects an empty array on no boundary attributes. */ |
17703 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17704 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17705 | |
39cbfefa DJ |
17706 | name = dwarf2_name (die, cu); |
17707 | if (name) | |
17708 | TYPE_NAME (range_type) = name; | |
6e70227d | 17709 | |
e142c38c | 17710 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
17711 | if (attr) |
17712 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
17713 | ||
2b4424c3 TT |
17714 | maybe_set_alignment (cu, die, range_type); |
17715 | ||
7e314c57 JK |
17716 | set_die_type (die, range_type, cu); |
17717 | ||
17718 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17719 | set_descriptive_type (range_type, die, cu); |
17720 | ||
7e314c57 | 17721 | return range_type; |
a02abb62 | 17722 | } |
6e70227d | 17723 | |
f792889a | 17724 | static struct type * |
81a17f79 JB |
17725 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17726 | { | |
17727 | struct type *type; | |
81a17f79 | 17728 | |
518817b3 SM |
17729 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17730 | NULL); | |
0114d602 | 17731 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17732 | |
74a2f8ff JB |
17733 | /* In Ada, an unspecified type is typically used when the description |
17734 | of the type is defered to a different unit. When encountering | |
17735 | such a type, we treat it as a stub, and try to resolve it later on, | |
17736 | when needed. */ | |
17737 | if (cu->language == language_ada) | |
17738 | TYPE_STUB (type) = 1; | |
17739 | ||
f792889a | 17740 | return set_die_type (die, type, cu); |
81a17f79 | 17741 | } |
a02abb62 | 17742 | |
639d11d3 DC |
17743 | /* Read a single die and all its descendents. Set the die's sibling |
17744 | field to NULL; set other fields in the die correctly, and set all | |
17745 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17746 | location of the info_ptr after reading all of those dies. PARENT | |
17747 | is the parent of the die in question. */ | |
17748 | ||
17749 | static struct die_info * | |
dee91e82 | 17750 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17751 | const gdb_byte *info_ptr, |
17752 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17753 | struct die_info *parent) |
639d11d3 DC |
17754 | { |
17755 | struct die_info *die; | |
d521ce57 | 17756 | const gdb_byte *cur_ptr; |
639d11d3 DC |
17757 | int has_children; |
17758 | ||
bf6af496 | 17759 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
17760 | if (die == NULL) |
17761 | { | |
17762 | *new_info_ptr = cur_ptr; | |
17763 | return NULL; | |
17764 | } | |
93311388 | 17765 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
17766 | |
17767 | if (has_children) | |
bf6af496 | 17768 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17769 | else |
17770 | { | |
17771 | die->child = NULL; | |
17772 | *new_info_ptr = cur_ptr; | |
17773 | } | |
17774 | ||
17775 | die->sibling = NULL; | |
17776 | die->parent = parent; | |
17777 | return die; | |
17778 | } | |
17779 | ||
17780 | /* Read a die, all of its descendents, and all of its siblings; set | |
17781 | all of the fields of all of the dies correctly. Arguments are as | |
17782 | in read_die_and_children. */ | |
17783 | ||
17784 | static struct die_info * | |
bf6af496 | 17785 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17786 | const gdb_byte *info_ptr, |
17787 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17788 | struct die_info *parent) |
639d11d3 DC |
17789 | { |
17790 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17791 | const gdb_byte *cur_ptr; |
639d11d3 | 17792 | |
c906108c | 17793 | cur_ptr = info_ptr; |
639d11d3 DC |
17794 | first_die = last_sibling = NULL; |
17795 | ||
17796 | while (1) | |
c906108c | 17797 | { |
639d11d3 | 17798 | struct die_info *die |
dee91e82 | 17799 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17800 | |
1d325ec1 | 17801 | if (die == NULL) |
c906108c | 17802 | { |
639d11d3 DC |
17803 | *new_info_ptr = cur_ptr; |
17804 | return first_die; | |
c906108c | 17805 | } |
1d325ec1 DJ |
17806 | |
17807 | if (!first_die) | |
17808 | first_die = die; | |
c906108c | 17809 | else |
1d325ec1 DJ |
17810 | last_sibling->sibling = die; |
17811 | ||
17812 | last_sibling = die; | |
c906108c | 17813 | } |
c906108c SS |
17814 | } |
17815 | ||
bf6af496 DE |
17816 | /* Read a die, all of its descendents, and all of its siblings; set |
17817 | all of the fields of all of the dies correctly. Arguments are as | |
17818 | in read_die_and_children. | |
17819 | This the main entry point for reading a DIE and all its children. */ | |
17820 | ||
17821 | static struct die_info * | |
17822 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17823 | const gdb_byte *info_ptr, |
17824 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17825 | struct die_info *parent) |
17826 | { | |
17827 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17828 | new_info_ptr, parent); | |
17829 | ||
b4f54984 | 17830 | if (dwarf_die_debug) |
bf6af496 DE |
17831 | { |
17832 | fprintf_unfiltered (gdb_stdlog, | |
17833 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 17834 | get_section_name (reader->die_section), |
bf6af496 DE |
17835 | (unsigned) (info_ptr - reader->die_section->buffer), |
17836 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17837 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17838 | } |
17839 | ||
17840 | return die; | |
17841 | } | |
17842 | ||
3019eac3 DE |
17843 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17844 | attributes. | |
17845 | The caller is responsible for filling in the extra attributes | |
17846 | and updating (*DIEP)->num_attrs. | |
17847 | Set DIEP to point to a newly allocated die with its information, | |
17848 | except for its child, sibling, and parent fields. | |
17849 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 17850 | |
d521ce57 | 17851 | static const gdb_byte * |
3019eac3 | 17852 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17853 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 17854 | int *has_children, int num_extra_attrs) |
93311388 | 17855 | { |
b64f50a1 | 17856 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17857 | struct abbrev_info *abbrev; |
17858 | struct die_info *die; | |
17859 | struct dwarf2_cu *cu = reader->cu; | |
17860 | bfd *abfd = reader->abfd; | |
17861 | ||
9c541725 | 17862 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17863 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17864 | info_ptr += bytes_read; | |
17865 | if (!abbrev_number) | |
17866 | { | |
17867 | *diep = NULL; | |
17868 | *has_children = 0; | |
17869 | return info_ptr; | |
17870 | } | |
17871 | ||
685af9cd | 17872 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 17873 | if (!abbrev) |
348e048f DE |
17874 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17875 | abbrev_number, | |
17876 | bfd_get_filename (abfd)); | |
17877 | ||
3019eac3 | 17878 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17879 | die->sect_off = sect_off; |
93311388 DE |
17880 | die->tag = abbrev->tag; |
17881 | die->abbrev = abbrev_number; | |
17882 | ||
3019eac3 DE |
17883 | /* Make the result usable. |
17884 | The caller needs to update num_attrs after adding the extra | |
17885 | attributes. */ | |
93311388 DE |
17886 | die->num_attrs = abbrev->num_attrs; |
17887 | ||
17888 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
17889 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
17890 | info_ptr); | |
93311388 DE |
17891 | |
17892 | *diep = die; | |
17893 | *has_children = abbrev->has_children; | |
17894 | return info_ptr; | |
17895 | } | |
17896 | ||
3019eac3 DE |
17897 | /* Read a die and all its attributes. |
17898 | Set DIEP to point to a newly allocated die with its information, | |
17899 | except for its child, sibling, and parent fields. | |
17900 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
17901 | ||
d521ce57 | 17902 | static const gdb_byte * |
3019eac3 | 17903 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 17904 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
17905 | int *has_children) |
17906 | { | |
d521ce57 | 17907 | const gdb_byte *result; |
bf6af496 DE |
17908 | |
17909 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
17910 | ||
b4f54984 | 17911 | if (dwarf_die_debug) |
bf6af496 DE |
17912 | { |
17913 | fprintf_unfiltered (gdb_stdlog, | |
17914 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 17915 | get_section_name (reader->die_section), |
bf6af496 DE |
17916 | (unsigned) (info_ptr - reader->die_section->buffer), |
17917 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17918 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17919 | } |
17920 | ||
17921 | return result; | |
3019eac3 | 17922 | } |
433df2d4 DE |
17923 | \f |
17924 | /* Abbreviation tables. | |
3019eac3 | 17925 | |
433df2d4 | 17926 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
17927 | stored in a separate .debug_abbrev section. Before we read any |
17928 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
17929 | in a hash table. */ |
17930 | ||
17931 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
17932 | ||
685af9cd TT |
17933 | struct abbrev_info * |
17934 | abbrev_table::alloc_abbrev () | |
433df2d4 DE |
17935 | { |
17936 | struct abbrev_info *abbrev; | |
17937 | ||
685af9cd | 17938 | abbrev = XOBNEW (&abbrev_obstack, struct abbrev_info); |
433df2d4 | 17939 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 17940 | |
433df2d4 DE |
17941 | return abbrev; |
17942 | } | |
17943 | ||
17944 | /* Add an abbreviation to the table. */ | |
c906108c | 17945 | |
685af9cd TT |
17946 | void |
17947 | abbrev_table::add_abbrev (unsigned int abbrev_number, | |
17948 | struct abbrev_info *abbrev) | |
433df2d4 DE |
17949 | { |
17950 | unsigned int hash_number; | |
17951 | ||
17952 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 YQ |
17953 | abbrev->next = m_abbrevs[hash_number]; |
17954 | m_abbrevs[hash_number] = abbrev; | |
433df2d4 | 17955 | } |
dee91e82 | 17956 | |
433df2d4 DE |
17957 | /* Look up an abbrev in the table. |
17958 | Returns NULL if the abbrev is not found. */ | |
17959 | ||
685af9cd TT |
17960 | struct abbrev_info * |
17961 | abbrev_table::lookup_abbrev (unsigned int abbrev_number) | |
c906108c | 17962 | { |
433df2d4 DE |
17963 | unsigned int hash_number; |
17964 | struct abbrev_info *abbrev; | |
17965 | ||
17966 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 | 17967 | abbrev = m_abbrevs[hash_number]; |
433df2d4 DE |
17968 | |
17969 | while (abbrev) | |
17970 | { | |
17971 | if (abbrev->number == abbrev_number) | |
17972 | return abbrev; | |
17973 | abbrev = abbrev->next; | |
17974 | } | |
17975 | return NULL; | |
17976 | } | |
17977 | ||
17978 | /* Read in an abbrev table. */ | |
17979 | ||
685af9cd | 17980 | static abbrev_table_up |
ed2dc618 SM |
17981 | abbrev_table_read_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
17982 | struct dwarf2_section_info *section, | |
9c541725 | 17983 | sect_offset sect_off) |
433df2d4 DE |
17984 | { |
17985 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 17986 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 17987 | const gdb_byte *abbrev_ptr; |
c906108c SS |
17988 | struct abbrev_info *cur_abbrev; |
17989 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 17990 | unsigned int abbrev_form; |
f3dd6933 DJ |
17991 | struct attr_abbrev *cur_attrs; |
17992 | unsigned int allocated_attrs; | |
c906108c | 17993 | |
685af9cd | 17994 | abbrev_table_up abbrev_table (new struct abbrev_table (sect_off)); |
c906108c | 17995 | |
433df2d4 | 17996 | dwarf2_read_section (objfile, section); |
9c541725 | 17997 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
17998 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
17999 | abbrev_ptr += bytes_read; | |
18000 | ||
f3dd6933 | 18001 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 18002 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 18003 | |
0963b4bd | 18004 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
18005 | while (abbrev_number) |
18006 | { | |
685af9cd | 18007 | cur_abbrev = abbrev_table->alloc_abbrev (); |
c906108c SS |
18008 | |
18009 | /* read in abbrev header */ | |
18010 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
18011 | cur_abbrev->tag |
18012 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
18013 | abbrev_ptr += bytes_read; |
18014 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
18015 | abbrev_ptr += 1; | |
18016 | ||
18017 | /* now read in declarations */ | |
22d2f3ab | 18018 | for (;;) |
c906108c | 18019 | { |
43988095 JK |
18020 | LONGEST implicit_const; |
18021 | ||
22d2f3ab JK |
18022 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18023 | abbrev_ptr += bytes_read; | |
18024 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18025 | abbrev_ptr += bytes_read; | |
43988095 JK |
18026 | if (abbrev_form == DW_FORM_implicit_const) |
18027 | { | |
18028 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
18029 | &bytes_read); | |
18030 | abbrev_ptr += bytes_read; | |
18031 | } | |
18032 | else | |
18033 | { | |
18034 | /* Initialize it due to a false compiler warning. */ | |
18035 | implicit_const = -1; | |
18036 | } | |
22d2f3ab JK |
18037 | |
18038 | if (abbrev_name == 0) | |
18039 | break; | |
18040 | ||
f3dd6933 | 18041 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 18042 | { |
f3dd6933 DJ |
18043 | allocated_attrs += ATTR_ALLOC_CHUNK; |
18044 | cur_attrs | |
224c3ddb | 18045 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 18046 | } |
ae038cb0 | 18047 | |
aead7601 SM |
18048 | cur_attrs[cur_abbrev->num_attrs].name |
18049 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 18050 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 18051 | = (enum dwarf_form) abbrev_form; |
43988095 | 18052 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 18053 | ++cur_abbrev->num_attrs; |
c906108c SS |
18054 | } |
18055 | ||
8d749320 SM |
18056 | cur_abbrev->attrs = |
18057 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
18058 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
18059 | memcpy (cur_abbrev->attrs, cur_attrs, |
18060 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
18061 | ||
685af9cd | 18062 | abbrev_table->add_abbrev (abbrev_number, cur_abbrev); |
c906108c SS |
18063 | |
18064 | /* Get next abbreviation. | |
18065 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
18066 | always properly terminated with an abbrev number of 0. |
18067 | Exit loop if we encounter an abbreviation which we have | |
18068 | already read (which means we are about to read the abbreviations | |
18069 | for the next compile unit) or if the end of the abbreviation | |
18070 | table is reached. */ | |
433df2d4 | 18071 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
18072 | break; |
18073 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18074 | abbrev_ptr += bytes_read; | |
685af9cd | 18075 | if (abbrev_table->lookup_abbrev (abbrev_number) != NULL) |
c906108c SS |
18076 | break; |
18077 | } | |
f3dd6933 DJ |
18078 | |
18079 | xfree (cur_attrs); | |
433df2d4 | 18080 | return abbrev_table; |
c906108c SS |
18081 | } |
18082 | ||
72bf9492 DJ |
18083 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18084 | symbol for. */ | |
18085 | ||
18086 | static int | |
18087 | is_type_tag_for_partial (int tag) | |
18088 | { | |
18089 | switch (tag) | |
18090 | { | |
18091 | #if 0 | |
18092 | /* Some types that would be reasonable to generate partial symbols for, | |
18093 | that we don't at present. */ | |
18094 | case DW_TAG_array_type: | |
18095 | case DW_TAG_file_type: | |
18096 | case DW_TAG_ptr_to_member_type: | |
18097 | case DW_TAG_set_type: | |
18098 | case DW_TAG_string_type: | |
18099 | case DW_TAG_subroutine_type: | |
18100 | #endif | |
18101 | case DW_TAG_base_type: | |
18102 | case DW_TAG_class_type: | |
680b30c7 | 18103 | case DW_TAG_interface_type: |
72bf9492 DJ |
18104 | case DW_TAG_enumeration_type: |
18105 | case DW_TAG_structure_type: | |
18106 | case DW_TAG_subrange_type: | |
18107 | case DW_TAG_typedef: | |
18108 | case DW_TAG_union_type: | |
18109 | return 1; | |
18110 | default: | |
18111 | return 0; | |
18112 | } | |
18113 | } | |
18114 | ||
18115 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18116 | ||
18117 | static struct partial_die_info * | |
dee91e82 | 18118 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18119 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18120 | { |
dee91e82 | 18121 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 18122 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 18123 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18124 | unsigned int bytes_read; |
5afb4e99 | 18125 | unsigned int load_all = 0; |
72bf9492 DJ |
18126 | int nesting_level = 1; |
18127 | ||
18128 | parent_die = NULL; | |
18129 | last_die = NULL; | |
18130 | ||
7adf1e79 DE |
18131 | gdb_assert (cu->per_cu != NULL); |
18132 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18133 | load_all = 1; |
18134 | ||
72bf9492 DJ |
18135 | cu->partial_dies |
18136 | = htab_create_alloc_ex (cu->header.length / 12, | |
18137 | partial_die_hash, | |
18138 | partial_die_eq, | |
18139 | NULL, | |
18140 | &cu->comp_unit_obstack, | |
18141 | hashtab_obstack_allocate, | |
18142 | dummy_obstack_deallocate); | |
18143 | ||
72bf9492 DJ |
18144 | while (1) |
18145 | { | |
685af9cd | 18146 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
18147 | |
18148 | /* A NULL abbrev means the end of a series of children. */ | |
18149 | if (abbrev == NULL) | |
18150 | { | |
18151 | if (--nesting_level == 0) | |
cd9983dd YQ |
18152 | return first_die; |
18153 | ||
72bf9492 DJ |
18154 | info_ptr += bytes_read; |
18155 | last_die = parent_die; | |
18156 | parent_die = parent_die->die_parent; | |
18157 | continue; | |
18158 | } | |
18159 | ||
98bfdba5 PA |
18160 | /* Check for template arguments. We never save these; if |
18161 | they're seen, we just mark the parent, and go on our way. */ | |
18162 | if (parent_die != NULL | |
18163 | && cu->language == language_cplus | |
18164 | && (abbrev->tag == DW_TAG_template_type_param | |
18165 | || abbrev->tag == DW_TAG_template_value_param)) | |
18166 | { | |
18167 | parent_die->has_template_arguments = 1; | |
18168 | ||
18169 | if (!load_all) | |
18170 | { | |
18171 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18172 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18173 | continue; |
18174 | } | |
18175 | } | |
18176 | ||
0d99eb77 | 18177 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18178 | Skip their other children. */ |
18179 | if (!load_all | |
18180 | && cu->language == language_cplus | |
18181 | && parent_die != NULL | |
18182 | && parent_die->tag == DW_TAG_subprogram) | |
18183 | { | |
dee91e82 | 18184 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18185 | continue; |
18186 | } | |
18187 | ||
5afb4e99 DJ |
18188 | /* Check whether this DIE is interesting enough to save. Normally |
18189 | we would not be interested in members here, but there may be | |
18190 | later variables referencing them via DW_AT_specification (for | |
18191 | static members). */ | |
18192 | if (!load_all | |
18193 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18194 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18195 | && abbrev->tag != DW_TAG_enumerator |
18196 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18197 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18198 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18199 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18200 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18201 | && abbrev->tag != DW_TAG_module |
95554aad | 18202 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18203 | && abbrev->tag != DW_TAG_imported_unit |
18204 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18205 | { |
18206 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18207 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18208 | continue; |
18209 | } | |
18210 | ||
6f06d47b YQ |
18211 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18212 | abbrev); | |
cd9983dd | 18213 | |
48fbe735 | 18214 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18215 | |
18216 | /* This two-pass algorithm for processing partial symbols has a | |
18217 | high cost in cache pressure. Thus, handle some simple cases | |
18218 | here which cover the majority of C partial symbols. DIEs | |
18219 | which neither have specification tags in them, nor could have | |
18220 | specification tags elsewhere pointing at them, can simply be | |
18221 | processed and discarded. | |
18222 | ||
18223 | This segment is also optional; scan_partial_symbols and | |
18224 | add_partial_symbol will handle these DIEs if we chain | |
18225 | them in normally. When compilers which do not emit large | |
18226 | quantities of duplicate debug information are more common, | |
18227 | this code can probably be removed. */ | |
18228 | ||
18229 | /* Any complete simple types at the top level (pretty much all | |
18230 | of them, for a language without namespaces), can be processed | |
18231 | directly. */ | |
18232 | if (parent_die == NULL | |
cd9983dd YQ |
18233 | && pdi.has_specification == 0 |
18234 | && pdi.is_declaration == 0 | |
18235 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18236 | || pdi.tag == DW_TAG_base_type | |
18237 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 18238 | { |
cd9983dd YQ |
18239 | if (building_psymtab && pdi.name != NULL) |
18240 | add_psymbol_to_list (pdi.name, strlen (pdi.name), 0, | |
72bf9492 | 18241 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 18242 | &objfile->static_psymbols, |
1762568f | 18243 | 0, cu->language, objfile); |
cd9983dd | 18244 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18245 | continue; |
18246 | } | |
18247 | ||
d8228535 JK |
18248 | /* The exception for DW_TAG_typedef with has_children above is |
18249 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18250 | type_name_or_error will error on such types later. |
d8228535 JK |
18251 | |
18252 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18253 | it could not find the child DIEs referenced later, this is checked | |
18254 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18255 | ||
cd9983dd | 18256 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18257 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18258 | "- DIE at %s [in module %s]"), |
cd9983dd | 18259 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18260 | |
72bf9492 DJ |
18261 | /* If we're at the second level, and we're an enumerator, and |
18262 | our parent has no specification (meaning possibly lives in a | |
18263 | namespace elsewhere), then we can add the partial symbol now | |
18264 | instead of queueing it. */ | |
cd9983dd | 18265 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18266 | && parent_die != NULL |
18267 | && parent_die->die_parent == NULL | |
18268 | && parent_die->tag == DW_TAG_enumeration_type | |
18269 | && parent_die->has_specification == 0) | |
18270 | { | |
cd9983dd | 18271 | if (pdi.name == NULL) |
b98664d3 | 18272 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18273 | else if (building_psymtab) |
cd9983dd | 18274 | add_psymbol_to_list (pdi.name, strlen (pdi.name), 0, |
72bf9492 | 18275 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 18276 | cu->language == language_cplus |
bb5ed363 DE |
18277 | ? &objfile->global_psymbols |
18278 | : &objfile->static_psymbols, | |
1762568f | 18279 | 0, cu->language, objfile); |
72bf9492 | 18280 | |
cd9983dd | 18281 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18282 | continue; |
18283 | } | |
18284 | ||
cd9983dd | 18285 | struct partial_die_info *part_die |
6f06d47b | 18286 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18287 | |
72bf9492 DJ |
18288 | /* We'll save this DIE so link it in. */ |
18289 | part_die->die_parent = parent_die; | |
18290 | part_die->die_sibling = NULL; | |
18291 | part_die->die_child = NULL; | |
18292 | ||
18293 | if (last_die && last_die == parent_die) | |
18294 | last_die->die_child = part_die; | |
18295 | else if (last_die) | |
18296 | last_die->die_sibling = part_die; | |
18297 | ||
18298 | last_die = part_die; | |
18299 | ||
18300 | if (first_die == NULL) | |
18301 | first_die = part_die; | |
18302 | ||
18303 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18304 | find interesting need to be in the hash table, because we | |
18305 | also have the parent/sibling/child chains; only those that we | |
18306 | might refer to by offset later during partial symbol reading. | |
18307 | ||
18308 | For now this means things that might have be the target of a | |
18309 | DW_AT_specification, DW_AT_abstract_origin, or | |
18310 | DW_AT_extension. DW_AT_extension will refer only to | |
18311 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18312 | many things under the function DIE, but we do not recurse | |
18313 | into function DIEs during partial symbol reading) and | |
18314 | possibly variables as well; DW_AT_specification refers to | |
18315 | declarations. Declarations ought to have the DW_AT_declaration | |
18316 | flag. It happens that GCC forgets to put it in sometimes, but | |
18317 | only for functions, not for types. | |
18318 | ||
18319 | Adding more things than necessary to the hash table is harmless | |
18320 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18321 | wasted time in find_partial_die, when we reread the compilation |
18322 | unit with load_all_dies set. */ | |
72bf9492 | 18323 | |
5afb4e99 | 18324 | if (load_all |
72929c62 | 18325 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18326 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18327 | || abbrev->tag == DW_TAG_variable |
18328 | || abbrev->tag == DW_TAG_namespace | |
18329 | || part_die->is_declaration) | |
18330 | { | |
18331 | void **slot; | |
18332 | ||
18333 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18334 | to_underlying (part_die->sect_off), |
18335 | INSERT); | |
72bf9492 DJ |
18336 | *slot = part_die; |
18337 | } | |
18338 | ||
72bf9492 | 18339 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 18340 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18341 | languages we have to, so that we can get at method physnames |
18342 | to infer fully qualified class names, for DW_AT_specification, | |
18343 | and for C++ template arguments. For C++, we also look one level | |
18344 | inside functions to find template arguments (if the name of the | |
18345 | function does not already contain the template arguments). | |
bc30ff58 JB |
18346 | |
18347 | For Ada, we need to scan the children of subprograms and lexical | |
18348 | blocks as well because Ada allows the definition of nested | |
18349 | entities that could be interesting for the debugger, such as | |
18350 | nested subprograms for instance. */ | |
72bf9492 | 18351 | if (last_die->has_children |
5afb4e99 DJ |
18352 | && (load_all |
18353 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18354 | || last_die->tag == DW_TAG_module |
72bf9492 | 18355 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18356 | || (cu->language == language_cplus |
18357 | && last_die->tag == DW_TAG_subprogram | |
18358 | && (last_die->name == NULL | |
18359 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18360 | || (cu->language != language_c |
18361 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18362 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18363 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
18364 | || last_die->tag == DW_TAG_union_type)) |
18365 | || (cu->language == language_ada | |
18366 | && (last_die->tag == DW_TAG_subprogram | |
18367 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18368 | { |
18369 | nesting_level++; | |
18370 | parent_die = last_die; | |
18371 | continue; | |
18372 | } | |
18373 | ||
18374 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18375 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18376 | |
18377 | /* Back to the top, do it again. */ | |
18378 | } | |
18379 | } | |
18380 | ||
6f06d47b YQ |
18381 | partial_die_info::partial_die_info (sect_offset sect_off_, |
18382 | struct abbrev_info *abbrev) | |
18383 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
18384 | { | |
18385 | } | |
18386 | ||
35cc7ed7 YQ |
18387 | /* Read a minimal amount of information into the minimal die structure. |
18388 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 18389 | |
48fbe735 YQ |
18390 | const gdb_byte * |
18391 | partial_die_info::read (const struct die_reader_specs *reader, | |
18392 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 18393 | { |
dee91e82 | 18394 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18395 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18396 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 18397 | unsigned int i; |
c5aa993b | 18398 | int has_low_pc_attr = 0; |
c906108c | 18399 | int has_high_pc_attr = 0; |
91da1414 | 18400 | int high_pc_relative = 0; |
c906108c | 18401 | |
fd0a254f | 18402 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 18403 | { |
48fbe735 YQ |
18404 | struct attribute attr; |
18405 | ||
fd0a254f | 18406 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
c906108c SS |
18407 | |
18408 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 18409 | partial symbol table. */ |
c906108c SS |
18410 | switch (attr.name) |
18411 | { | |
18412 | case DW_AT_name: | |
48fbe735 | 18413 | switch (tag) |
71c25dea TT |
18414 | { |
18415 | case DW_TAG_compile_unit: | |
95554aad | 18416 | case DW_TAG_partial_unit: |
348e048f | 18417 | case DW_TAG_type_unit: |
71c25dea TT |
18418 | /* Compilation units have a DW_AT_name that is a filename, not |
18419 | a source language identifier. */ | |
18420 | case DW_TAG_enumeration_type: | |
18421 | case DW_TAG_enumerator: | |
18422 | /* These tags always have simple identifiers already; no need | |
18423 | to canonicalize them. */ | |
48fbe735 | 18424 | name = DW_STRING (&attr); |
71c25dea TT |
18425 | break; |
18426 | default: | |
48fbe735 YQ |
18427 | { |
18428 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18429 | ||
18430 | name | |
18431 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
18432 | &objfile->per_bfd->storage_obstack); | |
18433 | } | |
71c25dea TT |
18434 | break; |
18435 | } | |
c906108c | 18436 | break; |
31ef98ae | 18437 | case DW_AT_linkage_name: |
c906108c | 18438 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18439 | /* Note that both forms of linkage name might appear. We |
18440 | assume they will be the same, and we only store the last | |
18441 | one we see. */ | |
94af9270 | 18442 | if (cu->language == language_ada) |
48fbe735 YQ |
18443 | name = DW_STRING (&attr); |
18444 | linkage_name = DW_STRING (&attr); | |
c906108c SS |
18445 | break; |
18446 | case DW_AT_low_pc: | |
18447 | has_low_pc_attr = 1; | |
48fbe735 | 18448 | lowpc = attr_value_as_address (&attr); |
c906108c SS |
18449 | break; |
18450 | case DW_AT_high_pc: | |
18451 | has_high_pc_attr = 1; | |
48fbe735 | 18452 | highpc = attr_value_as_address (&attr); |
31aa7e4e JB |
18453 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) |
18454 | high_pc_relative = 1; | |
c906108c SS |
18455 | break; |
18456 | case DW_AT_location: | |
0963b4bd | 18457 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
18458 | if (attr_form_is_block (&attr)) |
18459 | { | |
48fbe735 | 18460 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18461 | } |
3690dd37 | 18462 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 18463 | { |
4d3c2250 | 18464 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18465 | } |
18466 | else | |
18467 | { | |
4d3c2250 KB |
18468 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18469 | "partial symbol information"); | |
8e19ed76 | 18470 | } |
c906108c | 18471 | break; |
c906108c | 18472 | case DW_AT_external: |
48fbe735 | 18473 | is_external = DW_UNSND (&attr); |
c906108c SS |
18474 | break; |
18475 | case DW_AT_declaration: | |
48fbe735 | 18476 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18477 | break; |
18478 | case DW_AT_type: | |
48fbe735 | 18479 | has_type = 1; |
c906108c SS |
18480 | break; |
18481 | case DW_AT_abstract_origin: | |
18482 | case DW_AT_specification: | |
72bf9492 | 18483 | case DW_AT_extension: |
48fbe735 YQ |
18484 | has_specification = 1; |
18485 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18486 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18487 | || cu->per_cu->is_dwz); |
c906108c SS |
18488 | break; |
18489 | case DW_AT_sibling: | |
18490 | /* Ignore absolute siblings, they might point outside of | |
18491 | the current compile unit. */ | |
18492 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18493 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18494 | else |
b9502d3f | 18495 | { |
48fbe735 | 18496 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18497 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18498 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18499 | |
18500 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18501 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
18502 | else if (sibling_ptr > reader->buffer_end) |
18503 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 18504 | else |
48fbe735 | 18505 | sibling = sibling_ptr; |
b9502d3f | 18506 | } |
c906108c | 18507 | break; |
fa4028e9 | 18508 | case DW_AT_byte_size: |
48fbe735 | 18509 | has_byte_size = 1; |
fa4028e9 | 18510 | break; |
ff908ebf | 18511 | case DW_AT_const_value: |
48fbe735 | 18512 | has_const_value = 1; |
ff908ebf | 18513 | break; |
68511cec CES |
18514 | case DW_AT_calling_convention: |
18515 | /* DWARF doesn't provide a way to identify a program's source-level | |
18516 | entry point. DW_AT_calling_convention attributes are only meant | |
18517 | to describe functions' calling conventions. | |
18518 | ||
18519 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18520 | Fortran, and before DWARF 4 DW_CC_program was the only |
18521 | piece of debugging information whose definition refers to | |
18522 | a 'main program' at all, several compilers marked Fortran | |
18523 | main programs with DW_CC_program --- even when those | |
18524 | functions use the standard calling conventions. | |
18525 | ||
18526 | Although DWARF now specifies a way to provide this | |
18527 | information, we support this practice for backward | |
18528 | compatibility. */ | |
68511cec | 18529 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18530 | && cu->language == language_fortran) |
48fbe735 | 18531 | main_subprogram = 1; |
68511cec | 18532 | break; |
481860b3 GB |
18533 | case DW_AT_inline: |
18534 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18535 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18536 | may_be_inlined = 1; |
481860b3 | 18537 | break; |
95554aad TT |
18538 | |
18539 | case DW_AT_import: | |
48fbe735 | 18540 | if (tag == DW_TAG_imported_unit) |
36586728 | 18541 | { |
48fbe735 YQ |
18542 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18543 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18544 | || cu->per_cu->is_dwz); |
18545 | } | |
95554aad TT |
18546 | break; |
18547 | ||
0c1b455e | 18548 | case DW_AT_main_subprogram: |
48fbe735 | 18549 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18550 | break; |
18551 | ||
c906108c SS |
18552 | default: |
18553 | break; | |
18554 | } | |
18555 | } | |
18556 | ||
91da1414 | 18557 | if (high_pc_relative) |
48fbe735 | 18558 | highpc += lowpc; |
91da1414 | 18559 | |
9373cf26 JK |
18560 | if (has_low_pc_attr && has_high_pc_attr) |
18561 | { | |
18562 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18563 | eliminate duplicate copies of functions and vtables and such. | |
18564 | The linker will arbitrarily choose one and discard the others. | |
18565 | The AT_*_pc values for such functions refer to local labels in | |
18566 | these sections. If the section from that file was discarded, the | |
18567 | labels are not in the output, so the relocs get a value of 0. | |
18568 | If this is a discarded function, mark the pc bounds as invalid, | |
18569 | so that GDB will ignore it. */ | |
48fbe735 | 18570 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18571 | { |
48fbe735 | 18572 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18573 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18574 | |
b98664d3 | 18575 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18576 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18577 | paddress (gdbarch, lowpc), |
18578 | sect_offset_str (sect_off), | |
9d8780f0 | 18579 | objfile_name (objfile)); |
9373cf26 JK |
18580 | } |
18581 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18582 | else if (lowpc >= highpc) |
9373cf26 | 18583 | { |
48fbe735 | 18584 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18585 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18586 | |
b98664d3 | 18587 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18588 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18589 | paddress (gdbarch, lowpc), |
18590 | paddress (gdbarch, highpc), | |
18591 | sect_offset_str (sect_off), | |
9c541725 | 18592 | objfile_name (objfile)); |
9373cf26 JK |
18593 | } |
18594 | else | |
48fbe735 | 18595 | has_pc_info = 1; |
9373cf26 | 18596 | } |
85cbf3d3 | 18597 | |
c906108c SS |
18598 | return info_ptr; |
18599 | } | |
18600 | ||
72bf9492 DJ |
18601 | /* Find a cached partial DIE at OFFSET in CU. */ |
18602 | ||
d590ff25 YQ |
18603 | struct partial_die_info * |
18604 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18605 | { |
18606 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18607 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18608 | |
9a3c8263 | 18609 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18610 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18611 | to_underlying (sect_off))); |
72bf9492 | 18612 | |
72bf9492 DJ |
18613 | return lookup_die; |
18614 | } | |
18615 | ||
348e048f DE |
18616 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18617 | except in the case of .debug_types DIEs which do not reference | |
18618 | outside their CU (they do however referencing other types via | |
55f1336d | 18619 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
18620 | |
18621 | static struct partial_die_info * | |
9c541725 | 18622 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18623 | { |
518817b3 SM |
18624 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18625 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18626 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18627 | struct dwarf2_per_cu_data *per_cu = NULL; |
18628 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18629 | |
36586728 | 18630 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 18631 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 18632 | { |
d590ff25 | 18633 | pd = cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18634 | if (pd != NULL) |
18635 | return pd; | |
0d99eb77 DE |
18636 | /* We missed recording what we needed. |
18637 | Load all dies and try again. */ | |
18638 | per_cu = cu->per_cu; | |
5afb4e99 | 18639 | } |
0d99eb77 DE |
18640 | else |
18641 | { | |
18642 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18643 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18644 | { |
9d8780f0 SM |
18645 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18646 | " external reference to offset %s [in module %s].\n"), | |
18647 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18648 | bfd_get_filename (objfile->obfd)); |
18649 | } | |
9c541725 | 18650 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18651 | dwarf2_per_objfile); |
72bf9492 | 18652 | |
0d99eb77 DE |
18653 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18654 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18655 | |
0d99eb77 | 18656 | per_cu->cu->last_used = 0; |
d590ff25 | 18657 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18658 | } |
5afb4e99 | 18659 | |
dee91e82 DE |
18660 | /* If we didn't find it, and not all dies have been loaded, |
18661 | load them all and try again. */ | |
18662 | ||
5afb4e99 DJ |
18663 | if (pd == NULL && per_cu->load_all_dies == 0) |
18664 | { | |
5afb4e99 | 18665 | per_cu->load_all_dies = 1; |
fd820528 DE |
18666 | |
18667 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18668 | THIS_CU->cu may already be in use. So we can't just free it and | |
18669 | replace its DIEs with the ones we read in. Instead, we leave those | |
18670 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18671 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18672 | set. */ | |
dee91e82 | 18673 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18674 | |
d590ff25 | 18675 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18676 | } |
18677 | ||
18678 | if (pd == NULL) | |
18679 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18680 | _("could not find partial DIE %s " |
3e43a32a | 18681 | "in cache [from module %s]\n"), |
9d8780f0 | 18682 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 18683 | return pd; |
72bf9492 DJ |
18684 | } |
18685 | ||
abc72ce4 DE |
18686 | /* See if we can figure out if the class lives in a namespace. We do |
18687 | this by looking for a member function; its demangled name will | |
18688 | contain namespace info, if there is any. */ | |
18689 | ||
18690 | static void | |
18691 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18692 | struct dwarf2_cu *cu) | |
18693 | { | |
18694 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18695 | what template types look like, because the demangler | |
18696 | frequently doesn't give the same name as the debug info. We | |
18697 | could fix this by only using the demangled name to get the | |
18698 | prefix (but see comment in read_structure_type). */ | |
18699 | ||
18700 | struct partial_die_info *real_pdi; | |
18701 | struct partial_die_info *child_pdi; | |
18702 | ||
18703 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18704 | we should not do this. We'll prepend the parent's fully qualified | |
18705 | name when we create the partial symbol. */ | |
18706 | ||
18707 | real_pdi = struct_pdi; | |
18708 | while (real_pdi->has_specification) | |
36586728 TT |
18709 | real_pdi = find_partial_die (real_pdi->spec_offset, |
18710 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
18711 | |
18712 | if (real_pdi->die_parent != NULL) | |
18713 | return; | |
18714 | ||
18715 | for (child_pdi = struct_pdi->die_child; | |
18716 | child_pdi != NULL; | |
18717 | child_pdi = child_pdi->die_sibling) | |
18718 | { | |
18719 | if (child_pdi->tag == DW_TAG_subprogram | |
18720 | && child_pdi->linkage_name != NULL) | |
18721 | { | |
18722 | char *actual_class_name | |
18723 | = language_class_name_from_physname (cu->language_defn, | |
18724 | child_pdi->linkage_name); | |
18725 | if (actual_class_name != NULL) | |
18726 | { | |
518817b3 | 18727 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 | 18728 | struct_pdi->name |
224c3ddb | 18729 | = ((const char *) |
e3b94546 | 18730 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
224c3ddb SM |
18731 | actual_class_name, |
18732 | strlen (actual_class_name))); | |
abc72ce4 DE |
18733 | xfree (actual_class_name); |
18734 | } | |
18735 | break; | |
18736 | } | |
18737 | } | |
18738 | } | |
18739 | ||
52356b79 YQ |
18740 | void |
18741 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 18742 | { |
abc72ce4 DE |
18743 | /* Once we've fixed up a die, there's no point in doing so again. |
18744 | This also avoids a memory leak if we were to call | |
18745 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 18746 | if (fixup_called) |
abc72ce4 DE |
18747 | return; |
18748 | ||
72bf9492 DJ |
18749 | /* If we found a reference attribute and the DIE has no name, try |
18750 | to find a name in the referred to DIE. */ | |
18751 | ||
52356b79 | 18752 | if (name == NULL && has_specification) |
72bf9492 DJ |
18753 | { |
18754 | struct partial_die_info *spec_die; | |
72bf9492 | 18755 | |
52356b79 | 18756 | spec_die = find_partial_die (spec_offset, spec_is_dwz, cu); |
72bf9492 | 18757 | |
52356b79 | 18758 | spec_die->fixup (cu); |
72bf9492 DJ |
18759 | |
18760 | if (spec_die->name) | |
18761 | { | |
52356b79 | 18762 | name = spec_die->name; |
72bf9492 DJ |
18763 | |
18764 | /* Copy DW_AT_external attribute if it is set. */ | |
18765 | if (spec_die->is_external) | |
52356b79 | 18766 | is_external = spec_die->is_external; |
72bf9492 DJ |
18767 | } |
18768 | } | |
18769 | ||
18770 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 18771 | |
52356b79 YQ |
18772 | if (name == NULL && tag == DW_TAG_namespace) |
18773 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 18774 | |
abc72ce4 DE |
18775 | /* If there is no parent die to provide a namespace, and there are |
18776 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18777 | name. */ |
abc72ce4 | 18778 | if (cu->language == language_cplus |
518817b3 SM |
18779 | && !VEC_empty (dwarf2_section_info_def, |
18780 | cu->per_cu->dwarf2_per_objfile->types) | |
52356b79 YQ |
18781 | && die_parent == NULL |
18782 | && has_children | |
18783 | && (tag == DW_TAG_class_type | |
18784 | || tag == DW_TAG_structure_type | |
18785 | || tag == DW_TAG_union_type)) | |
18786 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 18787 | |
53832f31 TT |
18788 | /* GCC might emit a nameless struct or union that has a linkage |
18789 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
18790 | if (name == NULL |
18791 | && (tag == DW_TAG_class_type | |
18792 | || tag == DW_TAG_interface_type | |
18793 | || tag == DW_TAG_structure_type | |
18794 | || tag == DW_TAG_union_type) | |
18795 | && linkage_name != NULL) | |
53832f31 TT |
18796 | { |
18797 | char *demangled; | |
18798 | ||
52356b79 | 18799 | demangled = gdb_demangle (linkage_name, DMGL_TYPES); |
53832f31 TT |
18800 | if (demangled) |
18801 | { | |
96408a79 SA |
18802 | const char *base; |
18803 | ||
18804 | /* Strip any leading namespaces/classes, keep only the base name. | |
18805 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
18806 | base = strrchr (demangled, ':'); | |
18807 | if (base && base > demangled && base[-1] == ':') | |
18808 | base++; | |
18809 | else | |
18810 | base = demangled; | |
18811 | ||
518817b3 | 18812 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
52356b79 | 18813 | name |
224c3ddb | 18814 | = ((const char *) |
e3b94546 | 18815 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
224c3ddb | 18816 | base, strlen (base))); |
53832f31 TT |
18817 | xfree (demangled); |
18818 | } | |
18819 | } | |
18820 | ||
52356b79 | 18821 | fixup_called = 1; |
72bf9492 DJ |
18822 | } |
18823 | ||
a8329558 | 18824 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18825 | |
d521ce57 | 18826 | static const gdb_byte * |
dee91e82 DE |
18827 | read_attribute_value (const struct die_reader_specs *reader, |
18828 | struct attribute *attr, unsigned form, | |
43988095 | 18829 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 18830 | { |
dee91e82 | 18831 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18832 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18833 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18834 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 18835 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 18836 | bfd *abfd = reader->abfd; |
e7c27a73 | 18837 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18838 | unsigned int bytes_read; |
18839 | struct dwarf_block *blk; | |
18840 | ||
aead7601 | 18841 | attr->form = (enum dwarf_form) form; |
a8329558 | 18842 | switch (form) |
c906108c | 18843 | { |
c906108c | 18844 | case DW_FORM_ref_addr: |
ae411497 | 18845 | if (cu->header.version == 2) |
4568ecf9 | 18846 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 18847 | else |
4568ecf9 DE |
18848 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
18849 | &cu->header, &bytes_read); | |
ae411497 TT |
18850 | info_ptr += bytes_read; |
18851 | break; | |
36586728 TT |
18852 | case DW_FORM_GNU_ref_alt: |
18853 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
18854 | info_ptr += bytes_read; | |
18855 | break; | |
ae411497 | 18856 | case DW_FORM_addr: |
e7c27a73 | 18857 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 18858 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 18859 | info_ptr += bytes_read; |
c906108c SS |
18860 | break; |
18861 | case DW_FORM_block2: | |
7b5a2f43 | 18862 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18863 | blk->size = read_2_bytes (abfd, info_ptr); |
18864 | info_ptr += 2; | |
18865 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18866 | info_ptr += blk->size; | |
18867 | DW_BLOCK (attr) = blk; | |
18868 | break; | |
18869 | case DW_FORM_block4: | |
7b5a2f43 | 18870 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18871 | blk->size = read_4_bytes (abfd, info_ptr); |
18872 | info_ptr += 4; | |
18873 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18874 | info_ptr += blk->size; | |
18875 | DW_BLOCK (attr) = blk; | |
18876 | break; | |
18877 | case DW_FORM_data2: | |
18878 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18879 | info_ptr += 2; | |
18880 | break; | |
18881 | case DW_FORM_data4: | |
18882 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18883 | info_ptr += 4; | |
18884 | break; | |
18885 | case DW_FORM_data8: | |
18886 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18887 | info_ptr += 8; | |
18888 | break; | |
0224619f JK |
18889 | case DW_FORM_data16: |
18890 | blk = dwarf_alloc_block (cu); | |
18891 | blk->size = 16; | |
18892 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18893 | info_ptr += 16; | |
18894 | DW_BLOCK (attr) = blk; | |
18895 | break; | |
2dc7f7b3 TT |
18896 | case DW_FORM_sec_offset: |
18897 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
18898 | info_ptr += bytes_read; | |
18899 | break; | |
c906108c | 18900 | case DW_FORM_string: |
9b1c24c8 | 18901 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 18902 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
18903 | info_ptr += bytes_read; |
18904 | break; | |
4bdf3d34 | 18905 | case DW_FORM_strp: |
36586728 TT |
18906 | if (!cu->per_cu->is_dwz) |
18907 | { | |
ed2dc618 SM |
18908 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
18909 | abfd, info_ptr, cu_header, | |
36586728 TT |
18910 | &bytes_read); |
18911 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18912 | info_ptr += bytes_read; | |
18913 | break; | |
18914 | } | |
18915 | /* FALLTHROUGH */ | |
43988095 JK |
18916 | case DW_FORM_line_strp: |
18917 | if (!cu->per_cu->is_dwz) | |
18918 | { | |
ed2dc618 SM |
18919 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
18920 | abfd, info_ptr, | |
43988095 JK |
18921 | cu_header, &bytes_read); |
18922 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18923 | info_ptr += bytes_read; | |
18924 | break; | |
18925 | } | |
18926 | /* FALLTHROUGH */ | |
36586728 TT |
18927 | case DW_FORM_GNU_strp_alt: |
18928 | { | |
ed2dc618 | 18929 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
18930 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, |
18931 | &bytes_read); | |
18932 | ||
ed2dc618 SM |
18933 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
18934 | dwz, str_offset); | |
36586728 TT |
18935 | DW_STRING_IS_CANONICAL (attr) = 0; |
18936 | info_ptr += bytes_read; | |
18937 | } | |
4bdf3d34 | 18938 | break; |
2dc7f7b3 | 18939 | case DW_FORM_exprloc: |
c906108c | 18940 | case DW_FORM_block: |
7b5a2f43 | 18941 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18942 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18943 | info_ptr += bytes_read; | |
18944 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18945 | info_ptr += blk->size; | |
18946 | DW_BLOCK (attr) = blk; | |
18947 | break; | |
18948 | case DW_FORM_block1: | |
7b5a2f43 | 18949 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18950 | blk->size = read_1_byte (abfd, info_ptr); |
18951 | info_ptr += 1; | |
18952 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18953 | info_ptr += blk->size; | |
18954 | DW_BLOCK (attr) = blk; | |
18955 | break; | |
18956 | case DW_FORM_data1: | |
18957 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18958 | info_ptr += 1; | |
18959 | break; | |
18960 | case DW_FORM_flag: | |
18961 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18962 | info_ptr += 1; | |
18963 | break; | |
2dc7f7b3 TT |
18964 | case DW_FORM_flag_present: |
18965 | DW_UNSND (attr) = 1; | |
18966 | break; | |
c906108c SS |
18967 | case DW_FORM_sdata: |
18968 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18969 | info_ptr += bytes_read; | |
18970 | break; | |
18971 | case DW_FORM_udata: | |
18972 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
18973 | info_ptr += bytes_read; | |
18974 | break; | |
18975 | case DW_FORM_ref1: | |
9c541725 | 18976 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18977 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
18978 | info_ptr += 1; |
18979 | break; | |
18980 | case DW_FORM_ref2: | |
9c541725 | 18981 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18982 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
18983 | info_ptr += 2; |
18984 | break; | |
18985 | case DW_FORM_ref4: | |
9c541725 | 18986 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18987 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
18988 | info_ptr += 4; |
18989 | break; | |
613e1657 | 18990 | case DW_FORM_ref8: |
9c541725 | 18991 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18992 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
18993 | info_ptr += 8; |
18994 | break; | |
55f1336d | 18995 | case DW_FORM_ref_sig8: |
ac9ec31b | 18996 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
18997 | info_ptr += 8; |
18998 | break; | |
c906108c | 18999 | case DW_FORM_ref_udata: |
9c541725 | 19000 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19001 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19002 | info_ptr += bytes_read; |
19003 | break; | |
c906108c | 19004 | case DW_FORM_indirect: |
a8329558 KW |
19005 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19006 | info_ptr += bytes_read; | |
43988095 JK |
19007 | if (form == DW_FORM_implicit_const) |
19008 | { | |
19009 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19010 | info_ptr += bytes_read; | |
19011 | } | |
19012 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
19013 | info_ptr); | |
19014 | break; | |
19015 | case DW_FORM_implicit_const: | |
19016 | DW_SND (attr) = implicit_const; | |
a8329558 | 19017 | break; |
3019eac3 DE |
19018 | case DW_FORM_GNU_addr_index: |
19019 | if (reader->dwo_file == NULL) | |
19020 | { | |
19021 | /* For now flag a hard error. | |
19022 | Later we can turn this into a complaint. */ | |
19023 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19024 | dwarf_form_name (form), | |
19025 | bfd_get_filename (abfd)); | |
19026 | } | |
19027 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
19028 | info_ptr += bytes_read; | |
19029 | break; | |
19030 | case DW_FORM_GNU_str_index: | |
19031 | if (reader->dwo_file == NULL) | |
19032 | { | |
19033 | /* For now flag a hard error. | |
19034 | Later we can turn this into a complaint if warranted. */ | |
19035 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19036 | dwarf_form_name (form), | |
19037 | bfd_get_filename (abfd)); | |
19038 | } | |
19039 | { | |
19040 | ULONGEST str_index = | |
19041 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19042 | ||
342587c4 | 19043 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
19044 | DW_STRING_IS_CANONICAL (attr) = 0; |
19045 | info_ptr += bytes_read; | |
19046 | } | |
19047 | break; | |
c906108c | 19048 | default: |
8a3fe4f8 | 19049 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19050 | dwarf_form_name (form), |
19051 | bfd_get_filename (abfd)); | |
c906108c | 19052 | } |
28e94949 | 19053 | |
36586728 | 19054 | /* Super hack. */ |
7771576e | 19055 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
19056 | attr->form = DW_FORM_GNU_ref_alt; |
19057 | ||
28e94949 JB |
19058 | /* We have seen instances where the compiler tried to emit a byte |
19059 | size attribute of -1 which ended up being encoded as an unsigned | |
19060 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19061 | an object of this size seems pretty unlikely so we can relatively | |
19062 | safely treat these cases as if the size attribute was invalid and | |
19063 | treat them as zero by default. */ | |
19064 | if (attr->name == DW_AT_byte_size | |
19065 | && form == DW_FORM_data4 | |
19066 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19067 | { |
19068 | complaint | |
b98664d3 | 19069 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 19070 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
19071 | DW_UNSND (attr) = 0; |
19072 | } | |
28e94949 | 19073 | |
c906108c SS |
19074 | return info_ptr; |
19075 | } | |
19076 | ||
a8329558 KW |
19077 | /* Read an attribute described by an abbreviated attribute. */ |
19078 | ||
d521ce57 | 19079 | static const gdb_byte * |
dee91e82 DE |
19080 | read_attribute (const struct die_reader_specs *reader, |
19081 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 19082 | const gdb_byte *info_ptr) |
a8329558 KW |
19083 | { |
19084 | attr->name = abbrev->name; | |
43988095 JK |
19085 | return read_attribute_value (reader, attr, abbrev->form, |
19086 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
19087 | } |
19088 | ||
0963b4bd | 19089 | /* Read dwarf information from a buffer. */ |
c906108c SS |
19090 | |
19091 | static unsigned int | |
a1855c1d | 19092 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19093 | { |
fe1b8b76 | 19094 | return bfd_get_8 (abfd, buf); |
c906108c SS |
19095 | } |
19096 | ||
19097 | static int | |
a1855c1d | 19098 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19099 | { |
fe1b8b76 | 19100 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
19101 | } |
19102 | ||
19103 | static unsigned int | |
a1855c1d | 19104 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19105 | { |
fe1b8b76 | 19106 | return bfd_get_16 (abfd, buf); |
c906108c SS |
19107 | } |
19108 | ||
21ae7a4d | 19109 | static int |
a1855c1d | 19110 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19111 | { |
19112 | return bfd_get_signed_16 (abfd, buf); | |
19113 | } | |
19114 | ||
c906108c | 19115 | static unsigned int |
a1855c1d | 19116 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19117 | { |
fe1b8b76 | 19118 | return bfd_get_32 (abfd, buf); |
c906108c SS |
19119 | } |
19120 | ||
21ae7a4d | 19121 | static int |
a1855c1d | 19122 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19123 | { |
19124 | return bfd_get_signed_32 (abfd, buf); | |
19125 | } | |
19126 | ||
93311388 | 19127 | static ULONGEST |
a1855c1d | 19128 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19129 | { |
fe1b8b76 | 19130 | return bfd_get_64 (abfd, buf); |
c906108c SS |
19131 | } |
19132 | ||
19133 | static CORE_ADDR | |
d521ce57 | 19134 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 19135 | unsigned int *bytes_read) |
c906108c | 19136 | { |
e7c27a73 | 19137 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19138 | CORE_ADDR retval = 0; |
19139 | ||
107d2387 | 19140 | if (cu_header->signed_addr_p) |
c906108c | 19141 | { |
107d2387 AC |
19142 | switch (cu_header->addr_size) |
19143 | { | |
19144 | case 2: | |
fe1b8b76 | 19145 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
19146 | break; |
19147 | case 4: | |
fe1b8b76 | 19148 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
19149 | break; |
19150 | case 8: | |
fe1b8b76 | 19151 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
19152 | break; |
19153 | default: | |
8e65ff28 | 19154 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 19155 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 19156 | bfd_get_filename (abfd)); |
107d2387 AC |
19157 | } |
19158 | } | |
19159 | else | |
19160 | { | |
19161 | switch (cu_header->addr_size) | |
19162 | { | |
19163 | case 2: | |
fe1b8b76 | 19164 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
19165 | break; |
19166 | case 4: | |
fe1b8b76 | 19167 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
19168 | break; |
19169 | case 8: | |
fe1b8b76 | 19170 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
19171 | break; |
19172 | default: | |
8e65ff28 | 19173 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
19174 | _("read_address: bad switch, " |
19175 | "unsigned [in module %s]"), | |
659b0389 | 19176 | bfd_get_filename (abfd)); |
107d2387 | 19177 | } |
c906108c | 19178 | } |
64367e0a | 19179 | |
107d2387 AC |
19180 | *bytes_read = cu_header->addr_size; |
19181 | return retval; | |
c906108c SS |
19182 | } |
19183 | ||
f7ef9339 | 19184 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
19185 | specification allows the initial length to take up either 4 bytes |
19186 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
19187 | bytes describe the length and all offsets will be 8 bytes in length | |
19188 | instead of 4. | |
19189 | ||
f7ef9339 KB |
19190 | An older, non-standard 64-bit format is also handled by this |
19191 | function. The older format in question stores the initial length | |
19192 | as an 8-byte quantity without an escape value. Lengths greater | |
19193 | than 2^32 aren't very common which means that the initial 4 bytes | |
19194 | is almost always zero. Since a length value of zero doesn't make | |
19195 | sense for the 32-bit format, this initial zero can be considered to | |
19196 | be an escape value which indicates the presence of the older 64-bit | |
19197 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
19198 | greater than 4GB. If it becomes necessary to handle lengths |
19199 | somewhat larger than 4GB, we could allow other small values (such | |
19200 | as the non-sensical values of 1, 2, and 3) to also be used as | |
19201 | escape values indicating the presence of the old format. | |
f7ef9339 | 19202 | |
917c78fc MK |
19203 | The value returned via bytes_read should be used to increment the |
19204 | relevant pointer after calling read_initial_length(). | |
c764a876 | 19205 | |
613e1657 KB |
19206 | [ Note: read_initial_length() and read_offset() are based on the |
19207 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 19208 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
19209 | from: |
19210 | ||
f7ef9339 | 19211 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 19212 | |
613e1657 KB |
19213 | This document is only a draft and is subject to change. (So beware.) |
19214 | ||
f7ef9339 | 19215 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
19216 | determined empirically by examining 64-bit ELF files produced by |
19217 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
19218 | |
19219 | - Kevin, July 16, 2002 | |
613e1657 KB |
19220 | ] */ |
19221 | ||
19222 | static LONGEST | |
d521ce57 | 19223 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 19224 | { |
fe1b8b76 | 19225 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 19226 | |
dd373385 | 19227 | if (length == 0xffffffff) |
613e1657 | 19228 | { |
fe1b8b76 | 19229 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 19230 | *bytes_read = 12; |
613e1657 | 19231 | } |
dd373385 | 19232 | else if (length == 0) |
f7ef9339 | 19233 | { |
dd373385 | 19234 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 19235 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 19236 | *bytes_read = 8; |
f7ef9339 | 19237 | } |
613e1657 KB |
19238 | else |
19239 | { | |
19240 | *bytes_read = 4; | |
613e1657 KB |
19241 | } |
19242 | ||
c764a876 DE |
19243 | return length; |
19244 | } | |
dd373385 | 19245 | |
c764a876 DE |
19246 | /* Cover function for read_initial_length. |
19247 | Returns the length of the object at BUF, and stores the size of the | |
19248 | initial length in *BYTES_READ and stores the size that offsets will be in | |
19249 | *OFFSET_SIZE. | |
19250 | If the initial length size is not equivalent to that specified in | |
19251 | CU_HEADER then issue a complaint. | |
19252 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 19253 | |
c764a876 | 19254 | static LONGEST |
d521ce57 | 19255 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
19256 | const struct comp_unit_head *cu_header, |
19257 | unsigned int *bytes_read, | |
19258 | unsigned int *offset_size) | |
19259 | { | |
19260 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
19261 | ||
19262 | gdb_assert (cu_header->initial_length_size == 4 | |
19263 | || cu_header->initial_length_size == 8 | |
19264 | || cu_header->initial_length_size == 12); | |
19265 | ||
19266 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 19267 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 19268 | |
c764a876 | 19269 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 19270 | return length; |
613e1657 KB |
19271 | } |
19272 | ||
19273 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 19274 | given by cu_header->offset_size. */ |
613e1657 KB |
19275 | |
19276 | static LONGEST | |
d521ce57 TT |
19277 | read_offset (bfd *abfd, const gdb_byte *buf, |
19278 | const struct comp_unit_head *cu_header, | |
891d2f0b | 19279 | unsigned int *bytes_read) |
c764a876 DE |
19280 | { |
19281 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 19282 | |
c764a876 DE |
19283 | *bytes_read = cu_header->offset_size; |
19284 | return offset; | |
19285 | } | |
19286 | ||
19287 | /* Read an offset from the data stream. */ | |
19288 | ||
19289 | static LONGEST | |
d521ce57 | 19290 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
19291 | { |
19292 | LONGEST retval = 0; | |
19293 | ||
c764a876 | 19294 | switch (offset_size) |
613e1657 KB |
19295 | { |
19296 | case 4: | |
fe1b8b76 | 19297 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
19298 | break; |
19299 | case 8: | |
fe1b8b76 | 19300 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
19301 | break; |
19302 | default: | |
8e65ff28 | 19303 | internal_error (__FILE__, __LINE__, |
c764a876 | 19304 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 19305 | bfd_get_filename (abfd)); |
613e1657 KB |
19306 | } |
19307 | ||
917c78fc | 19308 | return retval; |
613e1657 KB |
19309 | } |
19310 | ||
d521ce57 TT |
19311 | static const gdb_byte * |
19312 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
19313 | { |
19314 | /* If the size of a host char is 8 bits, we can return a pointer | |
19315 | to the buffer, otherwise we have to copy the data to a buffer | |
19316 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19317 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 19318 | return buf; |
c906108c SS |
19319 | } |
19320 | ||
d521ce57 TT |
19321 | static const char * |
19322 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
19323 | unsigned int *bytes_read_ptr) | |
c906108c SS |
19324 | { |
19325 | /* If the size of a host char is 8 bits, we can return a pointer | |
19326 | to the string, otherwise we have to copy the string to a buffer | |
19327 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19328 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
19329 | if (*buf == '\0') |
19330 | { | |
19331 | *bytes_read_ptr = 1; | |
19332 | return NULL; | |
19333 | } | |
d521ce57 TT |
19334 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
19335 | return (const char *) buf; | |
4bdf3d34 JJ |
19336 | } |
19337 | ||
43988095 JK |
19338 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
19339 | reporting strings FORM_NAME and SECT_NAME. */ | |
19340 | ||
d521ce57 | 19341 | static const char * |
ed2dc618 SM |
19342 | read_indirect_string_at_offset_from (struct objfile *objfile, |
19343 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
19344 | struct dwarf2_section_info *sect, |
19345 | const char *form_name, | |
19346 | const char *sect_name) | |
19347 | { | |
ed2dc618 | 19348 | dwarf2_read_section (objfile, sect); |
43988095 JK |
19349 | if (sect->buffer == NULL) |
19350 | error (_("%s used without %s section [in module %s]"), | |
19351 | form_name, sect_name, bfd_get_filename (abfd)); | |
19352 | if (str_offset >= sect->size) | |
19353 | error (_("%s pointing outside of %s section [in module %s]"), | |
19354 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 19355 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 19356 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 19357 | return NULL; |
43988095 JK |
19358 | return (const char *) (sect->buffer + str_offset); |
19359 | } | |
19360 | ||
19361 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
19362 | ||
19363 | static const char * | |
ed2dc618 SM |
19364 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19365 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19366 | { |
ed2dc618 SM |
19367 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19368 | abfd, str_offset, | |
43988095 JK |
19369 | &dwarf2_per_objfile->str, |
19370 | "DW_FORM_strp", ".debug_str"); | |
19371 | } | |
19372 | ||
19373 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
19374 | ||
19375 | static const char * | |
ed2dc618 SM |
19376 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19377 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19378 | { |
ed2dc618 SM |
19379 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19380 | abfd, str_offset, | |
43988095 JK |
19381 | &dwarf2_per_objfile->line_str, |
19382 | "DW_FORM_line_strp", | |
19383 | ".debug_line_str"); | |
c906108c SS |
19384 | } |
19385 | ||
36586728 TT |
19386 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
19387 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
19388 | the string consists of a single NUL byte, return NULL; otherwise | |
19389 | return a pointer to the string. */ | |
19390 | ||
d521ce57 | 19391 | static const char * |
ed2dc618 SM |
19392 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
19393 | LONGEST str_offset) | |
36586728 | 19394 | { |
ed2dc618 | 19395 | dwarf2_read_section (objfile, &dwz->str); |
36586728 TT |
19396 | |
19397 | if (dwz->str.buffer == NULL) | |
19398 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
19399 | "section [in module %s]"), | |
19400 | bfd_get_filename (dwz->dwz_bfd)); | |
19401 | if (str_offset >= dwz->str.size) | |
19402 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
19403 | ".debug_str section [in module %s]"), | |
19404 | bfd_get_filename (dwz->dwz_bfd)); | |
19405 | gdb_assert (HOST_CHAR_BIT == 8); | |
19406 | if (dwz->str.buffer[str_offset] == '\0') | |
19407 | return NULL; | |
d521ce57 | 19408 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
19409 | } |
19410 | ||
43988095 JK |
19411 | /* Return pointer to string at .debug_str offset as read from BUF. |
19412 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19413 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19414 | ||
d521ce57 | 19415 | static const char * |
ed2dc618 SM |
19416 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
19417 | const gdb_byte *buf, | |
cf2c3c16 TT |
19418 | const struct comp_unit_head *cu_header, |
19419 | unsigned int *bytes_read_ptr) | |
19420 | { | |
19421 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19422 | ||
ed2dc618 | 19423 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
19424 | } |
19425 | ||
43988095 JK |
19426 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
19427 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19428 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19429 | ||
19430 | static const char * | |
ed2dc618 SM |
19431 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19432 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
19433 | const struct comp_unit_head *cu_header, |
19434 | unsigned int *bytes_read_ptr) | |
19435 | { | |
19436 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19437 | ||
ed2dc618 SM |
19438 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
19439 | str_offset); | |
43988095 JK |
19440 | } |
19441 | ||
19442 | ULONGEST | |
d521ce57 | 19443 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 19444 | unsigned int *bytes_read_ptr) |
c906108c | 19445 | { |
12df843f | 19446 | ULONGEST result; |
ce5d95e1 | 19447 | unsigned int num_read; |
870f88f7 | 19448 | int shift; |
c906108c SS |
19449 | unsigned char byte; |
19450 | ||
19451 | result = 0; | |
19452 | shift = 0; | |
19453 | num_read = 0; | |
c906108c SS |
19454 | while (1) |
19455 | { | |
fe1b8b76 | 19456 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19457 | buf++; |
19458 | num_read++; | |
12df843f | 19459 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19460 | if ((byte & 128) == 0) |
19461 | { | |
19462 | break; | |
19463 | } | |
19464 | shift += 7; | |
19465 | } | |
19466 | *bytes_read_ptr = num_read; | |
19467 | return result; | |
19468 | } | |
19469 | ||
12df843f | 19470 | static LONGEST |
d521ce57 TT |
19471 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
19472 | unsigned int *bytes_read_ptr) | |
c906108c | 19473 | { |
12df843f | 19474 | LONGEST result; |
870f88f7 | 19475 | int shift, num_read; |
c906108c SS |
19476 | unsigned char byte; |
19477 | ||
19478 | result = 0; | |
19479 | shift = 0; | |
c906108c | 19480 | num_read = 0; |
c906108c SS |
19481 | while (1) |
19482 | { | |
fe1b8b76 | 19483 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19484 | buf++; |
19485 | num_read++; | |
12df843f | 19486 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
19487 | shift += 7; |
19488 | if ((byte & 128) == 0) | |
19489 | { | |
19490 | break; | |
19491 | } | |
19492 | } | |
77e0b926 | 19493 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 19494 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
19495 | *bytes_read_ptr = num_read; |
19496 | return result; | |
19497 | } | |
19498 | ||
3019eac3 DE |
19499 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
19500 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
19501 | ADDR_SIZE is the size of addresses from the CU header. */ | |
19502 | ||
19503 | static CORE_ADDR | |
ed2dc618 SM |
19504 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19505 | unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
3019eac3 DE |
19506 | { |
19507 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19508 | bfd *abfd = objfile->obfd; | |
19509 | const gdb_byte *info_ptr; | |
19510 | ||
19511 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
19512 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
19513 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 19514 | objfile_name (objfile)); |
3019eac3 DE |
19515 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
19516 | error (_("DW_FORM_addr_index pointing outside of " | |
19517 | ".debug_addr section [in module %s]"), | |
4262abfb | 19518 | objfile_name (objfile)); |
3019eac3 DE |
19519 | info_ptr = (dwarf2_per_objfile->addr.buffer |
19520 | + addr_base + addr_index * addr_size); | |
19521 | if (addr_size == 4) | |
19522 | return bfd_get_32 (abfd, info_ptr); | |
19523 | else | |
19524 | return bfd_get_64 (abfd, info_ptr); | |
19525 | } | |
19526 | ||
19527 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
19528 | ||
19529 | static CORE_ADDR | |
19530 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
19531 | { | |
518817b3 SM |
19532 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
19533 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
19534 | } |
19535 | ||
19536 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
19537 | ||
19538 | static CORE_ADDR | |
d521ce57 | 19539 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
19540 | unsigned int *bytes_read) |
19541 | { | |
518817b3 | 19542 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
19543 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
19544 | ||
19545 | return read_addr_index (cu, addr_index); | |
19546 | } | |
19547 | ||
19548 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
19549 | back to dwarf2_read_addr_index. */ | |
19550 | ||
19551 | struct dwarf2_read_addr_index_data | |
19552 | { | |
19553 | ULONGEST addr_base; | |
19554 | int addr_size; | |
19555 | }; | |
19556 | ||
19557 | /* die_reader_func for dwarf2_read_addr_index. */ | |
19558 | ||
19559 | static void | |
19560 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 19561 | const gdb_byte *info_ptr, |
3019eac3 DE |
19562 | struct die_info *comp_unit_die, |
19563 | int has_children, | |
19564 | void *data) | |
19565 | { | |
19566 | struct dwarf2_cu *cu = reader->cu; | |
19567 | struct dwarf2_read_addr_index_data *aidata = | |
19568 | (struct dwarf2_read_addr_index_data *) data; | |
19569 | ||
19570 | aidata->addr_base = cu->addr_base; | |
19571 | aidata->addr_size = cu->header.addr_size; | |
19572 | } | |
19573 | ||
19574 | /* Given an index in .debug_addr, fetch the value. | |
19575 | NOTE: This can be called during dwarf expression evaluation, | |
19576 | long after the debug information has been read, and thus per_cu->cu | |
19577 | may no longer exist. */ | |
19578 | ||
19579 | CORE_ADDR | |
19580 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
19581 | unsigned int addr_index) | |
19582 | { | |
ed2dc618 | 19583 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 DE |
19584 | struct dwarf2_cu *cu = per_cu->cu; |
19585 | ULONGEST addr_base; | |
19586 | int addr_size; | |
19587 | ||
3019eac3 DE |
19588 | /* We need addr_base and addr_size. |
19589 | If we don't have PER_CU->cu, we have to get it. | |
19590 | Nasty, but the alternative is storing the needed info in PER_CU, | |
19591 | which at this point doesn't seem justified: it's not clear how frequently | |
19592 | it would get used and it would increase the size of every PER_CU. | |
19593 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
19594 | so we're not in uncharted territory here. | |
19595 | Alas we need to be a bit more complicated as addr_base is contained | |
19596 | in the DIE. | |
19597 | ||
19598 | We don't need to read the entire CU(/TU). | |
19599 | We just need the header and top level die. | |
a1b64ce1 | 19600 | |
3019eac3 | 19601 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 19602 | For now we skip this optimization. */ |
3019eac3 DE |
19603 | |
19604 | if (cu != NULL) | |
19605 | { | |
19606 | addr_base = cu->addr_base; | |
19607 | addr_size = cu->header.addr_size; | |
19608 | } | |
19609 | else | |
19610 | { | |
19611 | struct dwarf2_read_addr_index_data aidata; | |
19612 | ||
a1b64ce1 DE |
19613 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
19614 | we need addr_base. */ | |
58f0c718 | 19615 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, false, |
a1b64ce1 | 19616 | dwarf2_read_addr_index_reader, &aidata); |
3019eac3 DE |
19617 | addr_base = aidata.addr_base; |
19618 | addr_size = aidata.addr_size; | |
19619 | } | |
19620 | ||
ed2dc618 SM |
19621 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
19622 | addr_size); | |
3019eac3 DE |
19623 | } |
19624 | ||
57d63ce2 DE |
19625 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
19626 | This is only used by the Fission support. */ | |
3019eac3 | 19627 | |
d521ce57 | 19628 | static const char * |
342587c4 | 19629 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 | 19630 | { |
ed2dc618 | 19631 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
19632 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19633 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19634 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 19635 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 19636 | bfd *abfd = objfile->obfd; |
73869dc2 DE |
19637 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
19638 | struct dwarf2_section_info *str_offsets_section = | |
19639 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 19640 | const gdb_byte *info_ptr; |
3019eac3 | 19641 | ULONGEST str_offset; |
57d63ce2 | 19642 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 19643 | |
73869dc2 DE |
19644 | dwarf2_read_section (objfile, str_section); |
19645 | dwarf2_read_section (objfile, str_offsets_section); | |
19646 | if (str_section->buffer == NULL) | |
57d63ce2 | 19647 | error (_("%s used without .debug_str.dwo section" |
9d8780f0 SM |
19648 | " in CU at offset %s [in module %s]"), |
19649 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19650 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 19651 | error (_("%s used without .debug_str_offsets.dwo section" |
9d8780f0 SM |
19652 | " in CU at offset %s [in module %s]"), |
19653 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19654 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 19655 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9d8780f0 SM |
19656 | " section in CU at offset %s [in module %s]"), |
19657 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19658 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
19659 | + str_index * cu->header.offset_size); |
19660 | if (cu->header.offset_size == 4) | |
19661 | str_offset = bfd_get_32 (abfd, info_ptr); | |
19662 | else | |
19663 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 19664 | if (str_offset >= str_section->size) |
57d63ce2 | 19665 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
19666 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
19667 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19668 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
19669 | } |
19670 | ||
3019eac3 DE |
19671 | /* Return the length of an LEB128 number in BUF. */ |
19672 | ||
19673 | static int | |
19674 | leb128_size (const gdb_byte *buf) | |
19675 | { | |
19676 | const gdb_byte *begin = buf; | |
19677 | gdb_byte byte; | |
19678 | ||
19679 | while (1) | |
19680 | { | |
19681 | byte = *buf++; | |
19682 | if ((byte & 128) == 0) | |
19683 | return buf - begin; | |
19684 | } | |
19685 | } | |
19686 | ||
c906108c | 19687 | static void |
e142c38c | 19688 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
19689 | { |
19690 | switch (lang) | |
19691 | { | |
19692 | case DW_LANG_C89: | |
76bee0cc | 19693 | case DW_LANG_C99: |
0cfd832f | 19694 | case DW_LANG_C11: |
c906108c | 19695 | case DW_LANG_C: |
d1be3247 | 19696 | case DW_LANG_UPC: |
e142c38c | 19697 | cu->language = language_c; |
c906108c | 19698 | break; |
9c37b5ae | 19699 | case DW_LANG_Java: |
c906108c | 19700 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19701 | case DW_LANG_C_plus_plus_11: |
19702 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19703 | cu->language = language_cplus; |
c906108c | 19704 | break; |
6aecb9c2 JB |
19705 | case DW_LANG_D: |
19706 | cu->language = language_d; | |
19707 | break; | |
c906108c SS |
19708 | case DW_LANG_Fortran77: |
19709 | case DW_LANG_Fortran90: | |
b21b22e0 | 19710 | case DW_LANG_Fortran95: |
f7de9aab MW |
19711 | case DW_LANG_Fortran03: |
19712 | case DW_LANG_Fortran08: | |
e142c38c | 19713 | cu->language = language_fortran; |
c906108c | 19714 | break; |
a766d390 DE |
19715 | case DW_LANG_Go: |
19716 | cu->language = language_go; | |
19717 | break; | |
c906108c | 19718 | case DW_LANG_Mips_Assembler: |
e142c38c | 19719 | cu->language = language_asm; |
c906108c SS |
19720 | break; |
19721 | case DW_LANG_Ada83: | |
8aaf0b47 | 19722 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19723 | cu->language = language_ada; |
19724 | break; | |
72019c9c GM |
19725 | case DW_LANG_Modula2: |
19726 | cu->language = language_m2; | |
19727 | break; | |
fe8e67fd PM |
19728 | case DW_LANG_Pascal83: |
19729 | cu->language = language_pascal; | |
19730 | break; | |
22566fbd DJ |
19731 | case DW_LANG_ObjC: |
19732 | cu->language = language_objc; | |
19733 | break; | |
c44af4eb TT |
19734 | case DW_LANG_Rust: |
19735 | case DW_LANG_Rust_old: | |
19736 | cu->language = language_rust; | |
19737 | break; | |
c906108c SS |
19738 | case DW_LANG_Cobol74: |
19739 | case DW_LANG_Cobol85: | |
c906108c | 19740 | default: |
e142c38c | 19741 | cu->language = language_minimal; |
c906108c SS |
19742 | break; |
19743 | } | |
e142c38c | 19744 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19745 | } |
19746 | ||
19747 | /* Return the named attribute or NULL if not there. */ | |
19748 | ||
19749 | static struct attribute * | |
e142c38c | 19750 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19751 | { |
a48e046c | 19752 | for (;;) |
c906108c | 19753 | { |
a48e046c TT |
19754 | unsigned int i; |
19755 | struct attribute *spec = NULL; | |
19756 | ||
19757 | for (i = 0; i < die->num_attrs; ++i) | |
19758 | { | |
19759 | if (die->attrs[i].name == name) | |
19760 | return &die->attrs[i]; | |
19761 | if (die->attrs[i].name == DW_AT_specification | |
19762 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19763 | spec = &die->attrs[i]; | |
19764 | } | |
19765 | ||
19766 | if (!spec) | |
19767 | break; | |
c906108c | 19768 | |
f2f0e013 | 19769 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19770 | } |
c5aa993b | 19771 | |
c906108c SS |
19772 | return NULL; |
19773 | } | |
19774 | ||
348e048f DE |
19775 | /* Return the named attribute or NULL if not there, |
19776 | but do not follow DW_AT_specification, etc. | |
19777 | This is for use in contexts where we're reading .debug_types dies. | |
19778 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
19779 | back up the chain, and we want to go down. */ | |
19780 | ||
19781 | static struct attribute * | |
45e58e77 | 19782 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
19783 | { |
19784 | unsigned int i; | |
19785 | ||
19786 | for (i = 0; i < die->num_attrs; ++i) | |
19787 | if (die->attrs[i].name == name) | |
19788 | return &die->attrs[i]; | |
19789 | ||
19790 | return NULL; | |
19791 | } | |
19792 | ||
7d45c7c3 KB |
19793 | /* Return the string associated with a string-typed attribute, or NULL if it |
19794 | is either not found or is of an incorrect type. */ | |
19795 | ||
19796 | static const char * | |
19797 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19798 | { | |
19799 | struct attribute *attr; | |
19800 | const char *str = NULL; | |
19801 | ||
19802 | attr = dwarf2_attr (die, name, cu); | |
19803 | ||
19804 | if (attr != NULL) | |
19805 | { | |
43988095 | 19806 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
19807 | || attr->form == DW_FORM_string |
19808 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 19809 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
19810 | str = DW_STRING (attr); |
19811 | else | |
b98664d3 | 19812 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
19813 | "DIE at %s in module %s"), |
19814 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 19815 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
19816 | } |
19817 | ||
19818 | return str; | |
19819 | } | |
19820 | ||
05cf31d1 JB |
19821 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19822 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19823 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19824 | |
19825 | static int | |
19826 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19827 | { | |
19828 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19829 | ||
19830 | return (attr && DW_UNSND (attr)); | |
19831 | } | |
19832 | ||
3ca72b44 | 19833 | static int |
e142c38c | 19834 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19835 | { |
05cf31d1 JB |
19836 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19837 | which value is non-zero. However, we have to be careful with | |
19838 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19839 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19840 | end up accidently finding a declaration attribute that belongs | |
19841 | to a different DIE referenced by the specification attribute, | |
19842 | even though the given DIE does not have a declaration attribute. */ | |
19843 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19844 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19845 | } |
19846 | ||
63d06c5c | 19847 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19848 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19849 | containing the return value on output. If there is no |
19850 | specification, but there is an abstract origin, that is | |
19851 | returned. */ | |
63d06c5c DC |
19852 | |
19853 | static struct die_info * | |
f2f0e013 | 19854 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19855 | { |
f2f0e013 DJ |
19856 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19857 | *spec_cu); | |
63d06c5c | 19858 | |
edb3359d DJ |
19859 | if (spec_attr == NULL) |
19860 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19861 | ||
63d06c5c DC |
19862 | if (spec_attr == NULL) |
19863 | return NULL; | |
19864 | else | |
f2f0e013 | 19865 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19866 | } |
c906108c | 19867 | |
527f3840 JK |
19868 | /* Stub for free_line_header to match void * callback types. */ |
19869 | ||
19870 | static void | |
19871 | free_line_header_voidp (void *arg) | |
19872 | { | |
9a3c8263 | 19873 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19874 | |
fff8551c | 19875 | delete lh; |
527f3840 JK |
19876 | } |
19877 | ||
fff8551c PA |
19878 | void |
19879 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 19880 | { |
27e0867f | 19881 | if (dwarf_line_debug >= 2) |
fff8551c PA |
19882 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
19883 | include_dirs.size () + 1, include_dir); | |
27e0867f | 19884 | |
fff8551c | 19885 | include_dirs.push_back (include_dir); |
debd256d | 19886 | } |
6e70227d | 19887 | |
fff8551c PA |
19888 | void |
19889 | line_header::add_file_name (const char *name, | |
ecfb656c | 19890 | dir_index d_index, |
fff8551c PA |
19891 | unsigned int mod_time, |
19892 | unsigned int length) | |
debd256d | 19893 | { |
27e0867f DE |
19894 | if (dwarf_line_debug >= 2) |
19895 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 19896 | (unsigned) file_names.size () + 1, name); |
27e0867f | 19897 | |
ecfb656c | 19898 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 19899 | } |
6e70227d | 19900 | |
83769d0b | 19901 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19902 | |
19903 | static struct dwarf2_section_info * | |
19904 | get_debug_line_section (struct dwarf2_cu *cu) | |
19905 | { | |
19906 | struct dwarf2_section_info *section; | |
518817b3 SM |
19907 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19908 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
19909 | |
19910 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19911 | DWO file. */ | |
19912 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19913 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19914 | else if (cu->per_cu->is_dwz) | |
19915 | { | |
ed2dc618 | 19916 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19917 | |
19918 | section = &dwz->line; | |
19919 | } | |
19920 | else | |
19921 | section = &dwarf2_per_objfile->line; | |
19922 | ||
19923 | return section; | |
19924 | } | |
19925 | ||
43988095 JK |
19926 | /* Read directory or file name entry format, starting with byte of |
19927 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
19928 | entries count and the entries themselves in the described entry | |
19929 | format. */ | |
19930 | ||
19931 | static void | |
ed2dc618 SM |
19932 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19933 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
19934 | struct line_header *lh, |
19935 | const struct comp_unit_head *cu_header, | |
19936 | void (*callback) (struct line_header *lh, | |
19937 | const char *name, | |
ecfb656c | 19938 | dir_index d_index, |
43988095 JK |
19939 | unsigned int mod_time, |
19940 | unsigned int length)) | |
19941 | { | |
19942 | gdb_byte format_count, formati; | |
19943 | ULONGEST data_count, datai; | |
19944 | const gdb_byte *buf = *bufp; | |
19945 | const gdb_byte *format_header_data; | |
43988095 JK |
19946 | unsigned int bytes_read; |
19947 | ||
19948 | format_count = read_1_byte (abfd, buf); | |
19949 | buf += 1; | |
19950 | format_header_data = buf; | |
19951 | for (formati = 0; formati < format_count; formati++) | |
19952 | { | |
19953 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19954 | buf += bytes_read; | |
19955 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19956 | buf += bytes_read; | |
19957 | } | |
19958 | ||
19959 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19960 | buf += bytes_read; | |
19961 | for (datai = 0; datai < data_count; datai++) | |
19962 | { | |
19963 | const gdb_byte *format = format_header_data; | |
19964 | struct file_entry fe; | |
19965 | ||
43988095 JK |
19966 | for (formati = 0; formati < format_count; formati++) |
19967 | { | |
ecfb656c | 19968 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19969 | format += bytes_read; |
43988095 | 19970 | |
ecfb656c | 19971 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19972 | format += bytes_read; |
ecfb656c PA |
19973 | |
19974 | gdb::optional<const char *> string; | |
19975 | gdb::optional<unsigned int> uint; | |
19976 | ||
43988095 JK |
19977 | switch (form) |
19978 | { | |
19979 | case DW_FORM_string: | |
ecfb656c | 19980 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
19981 | buf += bytes_read; |
19982 | break; | |
19983 | ||
19984 | case DW_FORM_line_strp: | |
ed2dc618 SM |
19985 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
19986 | abfd, buf, | |
ecfb656c PA |
19987 | cu_header, |
19988 | &bytes_read)); | |
43988095 JK |
19989 | buf += bytes_read; |
19990 | break; | |
19991 | ||
19992 | case DW_FORM_data1: | |
ecfb656c | 19993 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
19994 | buf += 1; |
19995 | break; | |
19996 | ||
19997 | case DW_FORM_data2: | |
ecfb656c | 19998 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
19999 | buf += 2; |
20000 | break; | |
20001 | ||
20002 | case DW_FORM_data4: | |
ecfb656c | 20003 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
20004 | buf += 4; |
20005 | break; | |
20006 | ||
20007 | case DW_FORM_data8: | |
ecfb656c | 20008 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
20009 | buf += 8; |
20010 | break; | |
20011 | ||
20012 | case DW_FORM_udata: | |
ecfb656c | 20013 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
20014 | buf += bytes_read; |
20015 | break; | |
20016 | ||
20017 | case DW_FORM_block: | |
20018 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
20019 | current GDB. */ | |
20020 | break; | |
20021 | } | |
ecfb656c PA |
20022 | |
20023 | switch (content_type) | |
20024 | { | |
20025 | case DW_LNCT_path: | |
20026 | if (string.has_value ()) | |
20027 | fe.name = *string; | |
20028 | break; | |
20029 | case DW_LNCT_directory_index: | |
20030 | if (uint.has_value ()) | |
20031 | fe.d_index = (dir_index) *uint; | |
20032 | break; | |
20033 | case DW_LNCT_timestamp: | |
20034 | if (uint.has_value ()) | |
20035 | fe.mod_time = *uint; | |
20036 | break; | |
20037 | case DW_LNCT_size: | |
20038 | if (uint.has_value ()) | |
20039 | fe.length = *uint; | |
20040 | break; | |
20041 | case DW_LNCT_MD5: | |
20042 | break; | |
20043 | default: | |
b98664d3 | 20044 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
20045 | pulongest (content_type)); |
20046 | } | |
43988095 JK |
20047 | } |
20048 | ||
ecfb656c | 20049 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
20050 | } |
20051 | ||
20052 | *bufp = buf; | |
20053 | } | |
20054 | ||
debd256d | 20055 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20056 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20057 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20058 | Returns NULL if there is a problem reading the header, e.g., if it |
20059 | has a version we don't understand. | |
debd256d JB |
20060 | |
20061 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20062 | the returned object point into the dwarf line section buffer, |
20063 | and must not be freed. */ | |
ae2de4f8 | 20064 | |
fff8551c | 20065 | static line_header_up |
9c541725 | 20066 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20067 | { |
d521ce57 | 20068 | const gdb_byte *line_ptr; |
c764a876 | 20069 | unsigned int bytes_read, offset_size; |
debd256d | 20070 | int i; |
d521ce57 | 20071 | const char *cur_dir, *cur_file; |
3019eac3 DE |
20072 | struct dwarf2_section_info *section; |
20073 | bfd *abfd; | |
518817b3 SM |
20074 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20075 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20076 | |
36586728 | 20077 | section = get_debug_line_section (cu); |
3019eac3 DE |
20078 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
20079 | if (section->buffer == NULL) | |
debd256d | 20080 | { |
3019eac3 | 20081 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20082 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20083 | else |
b98664d3 | 20084 | complaint (_("missing .debug_line section")); |
debd256d JB |
20085 | return 0; |
20086 | } | |
20087 | ||
fceca515 DE |
20088 | /* We can't do this until we know the section is non-empty. |
20089 | Only then do we know we have such a section. */ | |
a32a8923 | 20090 | abfd = get_section_bfd_owner (section); |
fceca515 | 20091 | |
a738430d MK |
20092 | /* Make sure that at least there's room for the total_length field. |
20093 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 20094 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 20095 | { |
4d3c2250 | 20096 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20097 | return 0; |
20098 | } | |
20099 | ||
fff8551c | 20100 | line_header_up lh (new line_header ()); |
debd256d | 20101 | |
9c541725 | 20102 | lh->sect_off = sect_off; |
527f3840 JK |
20103 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
20104 | ||
9c541725 | 20105 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 20106 | |
a738430d | 20107 | /* Read in the header. */ |
6e70227d | 20108 | lh->total_length = |
c764a876 DE |
20109 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
20110 | &bytes_read, &offset_size); | |
debd256d | 20111 | line_ptr += bytes_read; |
3019eac3 | 20112 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 20113 | { |
4d3c2250 | 20114 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20115 | return 0; |
20116 | } | |
20117 | lh->statement_program_end = line_ptr + lh->total_length; | |
20118 | lh->version = read_2_bytes (abfd, line_ptr); | |
20119 | line_ptr += 2; | |
43988095 | 20120 | if (lh->version > 5) |
cd366ee8 DE |
20121 | { |
20122 | /* This is a version we don't understand. The format could have | |
20123 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 20124 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
20125 | return NULL; |
20126 | } | |
43988095 JK |
20127 | if (lh->version >= 5) |
20128 | { | |
20129 | gdb_byte segment_selector_size; | |
20130 | ||
20131 | /* Skip address size. */ | |
20132 | read_1_byte (abfd, line_ptr); | |
20133 | line_ptr += 1; | |
20134 | ||
20135 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
20136 | line_ptr += 1; | |
20137 | if (segment_selector_size != 0) | |
20138 | { | |
b98664d3 | 20139 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
20140 | "in .debug_line section"), |
20141 | segment_selector_size); | |
20142 | return NULL; | |
20143 | } | |
20144 | } | |
c764a876 DE |
20145 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
20146 | line_ptr += offset_size; | |
debd256d JB |
20147 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
20148 | line_ptr += 1; | |
2dc7f7b3 TT |
20149 | if (lh->version >= 4) |
20150 | { | |
20151 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
20152 | line_ptr += 1; | |
20153 | } | |
20154 | else | |
20155 | lh->maximum_ops_per_instruction = 1; | |
20156 | ||
20157 | if (lh->maximum_ops_per_instruction == 0) | |
20158 | { | |
20159 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 20160 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 20161 | "in `.debug_line' section")); |
2dc7f7b3 TT |
20162 | } |
20163 | ||
debd256d JB |
20164 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
20165 | line_ptr += 1; | |
20166 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
20167 | line_ptr += 1; | |
20168 | lh->line_range = read_1_byte (abfd, line_ptr); | |
20169 | line_ptr += 1; | |
20170 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
20171 | line_ptr += 1; | |
fff8551c | 20172 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
20173 | |
20174 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
20175 | for (i = 1; i < lh->opcode_base; ++i) | |
20176 | { | |
20177 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
20178 | line_ptr += 1; | |
20179 | } | |
20180 | ||
43988095 | 20181 | if (lh->version >= 5) |
debd256d | 20182 | { |
43988095 | 20183 | /* Read directory table. */ |
ed2dc618 SM |
20184 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20185 | &cu->header, | |
fff8551c | 20186 | [] (struct line_header *lh, const char *name, |
ecfb656c | 20187 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20188 | unsigned int length) |
20189 | { | |
20190 | lh->add_include_dir (name); | |
20191 | }); | |
debd256d | 20192 | |
43988095 | 20193 | /* Read file name table. */ |
ed2dc618 SM |
20194 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20195 | &cu->header, | |
fff8551c | 20196 | [] (struct line_header *lh, const char *name, |
ecfb656c | 20197 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20198 | unsigned int length) |
20199 | { | |
ecfb656c | 20200 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 20201 | }); |
43988095 JK |
20202 | } |
20203 | else | |
debd256d | 20204 | { |
43988095 JK |
20205 | /* Read directory table. */ |
20206 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20207 | { | |
20208 | line_ptr += bytes_read; | |
fff8551c | 20209 | lh->add_include_dir (cur_dir); |
43988095 | 20210 | } |
debd256d JB |
20211 | line_ptr += bytes_read; |
20212 | ||
43988095 JK |
20213 | /* Read file name table. */ |
20214 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20215 | { | |
ecfb656c PA |
20216 | unsigned int mod_time, length; |
20217 | dir_index d_index; | |
43988095 JK |
20218 | |
20219 | line_ptr += bytes_read; | |
ecfb656c | 20220 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
20221 | line_ptr += bytes_read; |
20222 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20223 | line_ptr += bytes_read; | |
20224 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20225 | line_ptr += bytes_read; | |
20226 | ||
ecfb656c | 20227 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
20228 | } |
20229 | line_ptr += bytes_read; | |
debd256d | 20230 | } |
6e70227d | 20231 | lh->statement_program_start = line_ptr; |
debd256d | 20232 | |
3019eac3 | 20233 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 20234 | complaint (_("line number info header doesn't " |
3e43a32a | 20235 | "fit in `.debug_line' section")); |
debd256d | 20236 | |
debd256d JB |
20237 | return lh; |
20238 | } | |
c906108c | 20239 | |
c6da4cef DE |
20240 | /* Subroutine of dwarf_decode_lines to simplify it. |
20241 | Return the file name of the psymtab for included file FILE_INDEX | |
20242 | in line header LH of PST. | |
20243 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
c89b44cd TT |
20244 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20245 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20246 | |
d521ce57 | 20247 | static const char * |
c6da4cef DE |
20248 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
20249 | const struct partial_symtab *pst, | |
c89b44cd TT |
20250 | const char *comp_dir, |
20251 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20252 | { |
8c43009f | 20253 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
20254 | const char *include_name = fe.name; |
20255 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20256 | const char *pst_filename; |
c6da4cef DE |
20257 | int file_is_pst; |
20258 | ||
8c43009f | 20259 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20260 | |
c89b44cd | 20261 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20262 | if (!IS_ABSOLUTE_PATH (include_name) |
20263 | && (dir_name != NULL || comp_dir != NULL)) | |
20264 | { | |
20265 | /* Avoid creating a duplicate psymtab for PST. | |
20266 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20267 | Before we do the comparison, however, we need to account | |
20268 | for DIR_NAME and COMP_DIR. | |
20269 | First prepend dir_name (if non-NULL). If we still don't | |
20270 | have an absolute path prepend comp_dir (if non-NULL). | |
20271 | However, the directory we record in the include-file's | |
20272 | psymtab does not contain COMP_DIR (to match the | |
20273 | corresponding symtab(s)). | |
20274 | ||
20275 | Example: | |
20276 | ||
20277 | bash$ cd /tmp | |
20278 | bash$ gcc -g ./hello.c | |
20279 | include_name = "hello.c" | |
20280 | dir_name = "." | |
20281 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20282 | DW_AT_name = "./hello.c" |
20283 | ||
20284 | */ | |
c6da4cef DE |
20285 | |
20286 | if (dir_name != NULL) | |
20287 | { | |
c89b44cd TT |
20288 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20289 | include_name, (char *) NULL)); | |
20290 | include_name = name_holder->get (); | |
c6da4cef | 20291 | include_name_to_compare = include_name; |
c6da4cef DE |
20292 | } |
20293 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20294 | { | |
c89b44cd TT |
20295 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20296 | include_name, (char *) NULL)); | |
20297 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20298 | } |
20299 | } | |
20300 | ||
20301 | pst_filename = pst->filename; | |
c89b44cd | 20302 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20303 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20304 | { | |
c89b44cd TT |
20305 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20306 | pst_filename, (char *) NULL)); | |
20307 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20308 | } |
20309 | ||
1e3fad37 | 20310 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20311 | |
c6da4cef DE |
20312 | if (file_is_pst) |
20313 | return NULL; | |
20314 | return include_name; | |
20315 | } | |
20316 | ||
d9b3de22 DE |
20317 | /* State machine to track the state of the line number program. */ |
20318 | ||
6f77053d | 20319 | class lnp_state_machine |
d9b3de22 | 20320 | { |
6f77053d PA |
20321 | public: |
20322 | /* Initialize a machine state for the start of a line number | |
20323 | program. */ | |
804d2729 TT |
20324 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20325 | bool record_lines_p); | |
6f77053d | 20326 | |
8c43009f PA |
20327 | file_entry *current_file () |
20328 | { | |
20329 | /* lh->file_names is 0-based, but the file name numbers in the | |
20330 | statement program are 1-based. */ | |
6f77053d PA |
20331 | return m_line_header->file_name_at (m_file); |
20332 | } | |
20333 | ||
20334 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20335 | we're processing the end of a sequence. */ | |
20336 | void record_line (bool end_sequence); | |
20337 | ||
7ab6656f OJ |
20338 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
20339 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
20340 | void check_line_address (struct dwarf2_cu *cu, |
20341 | const gdb_byte *line_ptr, | |
7ab6656f | 20342 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20343 | |
20344 | void handle_set_discriminator (unsigned int discriminator) | |
20345 | { | |
20346 | m_discriminator = discriminator; | |
20347 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20348 | } | |
20349 | ||
20350 | /* Handle DW_LNE_set_address. */ | |
20351 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20352 | { | |
20353 | m_op_index = 0; | |
20354 | address += baseaddr; | |
20355 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20356 | } | |
20357 | ||
20358 | /* Handle DW_LNS_advance_pc. */ | |
20359 | void handle_advance_pc (CORE_ADDR adjust); | |
20360 | ||
20361 | /* Handle a special opcode. */ | |
20362 | void handle_special_opcode (unsigned char op_code); | |
20363 | ||
20364 | /* Handle DW_LNS_advance_line. */ | |
20365 | void handle_advance_line (int line_delta) | |
20366 | { | |
20367 | advance_line (line_delta); | |
20368 | } | |
20369 | ||
20370 | /* Handle DW_LNS_set_file. */ | |
20371 | void handle_set_file (file_name_index file); | |
20372 | ||
20373 | /* Handle DW_LNS_negate_stmt. */ | |
20374 | void handle_negate_stmt () | |
20375 | { | |
20376 | m_is_stmt = !m_is_stmt; | |
20377 | } | |
20378 | ||
20379 | /* Handle DW_LNS_const_add_pc. */ | |
20380 | void handle_const_add_pc (); | |
20381 | ||
20382 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20383 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20384 | { | |
20385 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20386 | m_op_index = 0; | |
20387 | } | |
20388 | ||
20389 | /* Handle DW_LNS_copy. */ | |
20390 | void handle_copy () | |
20391 | { | |
20392 | record_line (false); | |
20393 | m_discriminator = 0; | |
20394 | } | |
20395 | ||
20396 | /* Handle DW_LNE_end_sequence. */ | |
20397 | void handle_end_sequence () | |
20398 | { | |
804d2729 | 20399 | m_currently_recording_lines = true; |
6f77053d PA |
20400 | } |
20401 | ||
20402 | private: | |
20403 | /* Advance the line by LINE_DELTA. */ | |
20404 | void advance_line (int line_delta) | |
20405 | { | |
20406 | m_line += line_delta; | |
20407 | ||
20408 | if (line_delta != 0) | |
20409 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20410 | } |
20411 | ||
804d2729 TT |
20412 | struct dwarf2_cu *m_cu; |
20413 | ||
6f77053d PA |
20414 | gdbarch *m_gdbarch; |
20415 | ||
20416 | /* True if we're recording lines. | |
20417 | Otherwise we're building partial symtabs and are just interested in | |
20418 | finding include files mentioned by the line number program. */ | |
20419 | bool m_record_lines_p; | |
20420 | ||
8c43009f | 20421 | /* The line number header. */ |
6f77053d | 20422 | line_header *m_line_header; |
8c43009f | 20423 | |
6f77053d PA |
20424 | /* These are part of the standard DWARF line number state machine, |
20425 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20426 | |
6f77053d | 20427 | unsigned char m_op_index = 0; |
8c43009f | 20428 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
20429 | file_name_index m_file = (file_name_index) 1; |
20430 | unsigned int m_line = 1; | |
20431 | ||
20432 | /* These are initialized in the constructor. */ | |
20433 | ||
20434 | CORE_ADDR m_address; | |
20435 | bool m_is_stmt; | |
20436 | unsigned int m_discriminator; | |
d9b3de22 DE |
20437 | |
20438 | /* Additional bits of state we need to track. */ | |
20439 | ||
20440 | /* The last file that we called dwarf2_start_subfile for. | |
20441 | This is only used for TLLs. */ | |
6f77053d | 20442 | unsigned int m_last_file = 0; |
d9b3de22 | 20443 | /* The last file a line number was recorded for. */ |
6f77053d | 20444 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 20445 | |
804d2729 TT |
20446 | /* When true, record the lines we decode. */ |
20447 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
20448 | |
20449 | /* The last line number that was recorded, used to coalesce | |
20450 | consecutive entries for the same line. This can happen, for | |
20451 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20452 | unsigned int m_last_line = 0; |
20453 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20454 | }; |
d9b3de22 | 20455 | |
6f77053d PA |
20456 | void |
20457 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20458 | { | |
20459 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20460 | / m_line_header->maximum_ops_per_instruction) | |
20461 | * m_line_header->minimum_instruction_length); | |
20462 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20463 | m_op_index = ((m_op_index + adjust) | |
20464 | % m_line_header->maximum_ops_per_instruction); | |
20465 | } | |
d9b3de22 | 20466 | |
6f77053d PA |
20467 | void |
20468 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20469 | { |
6f77053d PA |
20470 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
20471 | CORE_ADDR addr_adj = (((m_op_index | |
20472 | + (adj_opcode / m_line_header->line_range)) | |
20473 | / m_line_header->maximum_ops_per_instruction) | |
20474 | * m_line_header->minimum_instruction_length); | |
20475 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20476 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
20477 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 20478 | |
6f77053d PA |
20479 | int line_delta = (m_line_header->line_base |
20480 | + (adj_opcode % m_line_header->line_range)); | |
20481 | advance_line (line_delta); | |
20482 | record_line (false); | |
20483 | m_discriminator = 0; | |
20484 | } | |
d9b3de22 | 20485 | |
6f77053d PA |
20486 | void |
20487 | lnp_state_machine::handle_set_file (file_name_index file) | |
20488 | { | |
20489 | m_file = file; | |
20490 | ||
20491 | const file_entry *fe = current_file (); | |
20492 | if (fe == NULL) | |
20493 | dwarf2_debug_line_missing_file_complaint (); | |
20494 | else if (m_record_lines_p) | |
20495 | { | |
20496 | const char *dir = fe->include_dir (m_line_header); | |
20497 | ||
804d2729 | 20498 | m_last_subfile = m_cu->builder->get_current_subfile (); |
6f77053d | 20499 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 20500 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
20501 | } |
20502 | } | |
20503 | ||
20504 | void | |
20505 | lnp_state_machine::handle_const_add_pc () | |
20506 | { | |
20507 | CORE_ADDR adjust | |
20508 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20509 | ||
20510 | CORE_ADDR addr_adj | |
20511 | = (((m_op_index + adjust) | |
20512 | / m_line_header->maximum_ops_per_instruction) | |
20513 | * m_line_header->minimum_instruction_length); | |
20514 | ||
20515 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20516 | m_op_index = ((m_op_index + adjust) | |
20517 | % m_line_header->maximum_ops_per_instruction); | |
20518 | } | |
d9b3de22 | 20519 | |
a05a36a5 DE |
20520 | /* Return non-zero if we should add LINE to the line number table. |
20521 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20522 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20523 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20524 | had a non-zero discriminator. | |
20525 | ||
20526 | We have to be careful in the presence of discriminators. | |
20527 | E.g., for this line: | |
20528 | ||
20529 | for (i = 0; i < 100000; i++); | |
20530 | ||
20531 | clang can emit four line number entries for that one line, | |
20532 | each with a different discriminator. | |
20533 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20534 | ||
20535 | However, we want gdb to coalesce all four entries into one. | |
20536 | Otherwise the user could stepi into the middle of the line and | |
20537 | gdb would get confused about whether the pc really was in the | |
20538 | middle of the line. | |
20539 | ||
20540 | Things are further complicated by the fact that two consecutive | |
20541 | line number entries for the same line is a heuristic used by gcc | |
20542 | to denote the end of the prologue. So we can't just discard duplicate | |
20543 | entries, we have to be selective about it. The heuristic we use is | |
20544 | that we only collapse consecutive entries for the same line if at least | |
20545 | one of those entries has a non-zero discriminator. PR 17276. | |
20546 | ||
20547 | Note: Addresses in the line number state machine can never go backwards | |
20548 | within one sequence, thus this coalescing is ok. */ | |
20549 | ||
20550 | static int | |
804d2729 TT |
20551 | dwarf_record_line_p (struct dwarf2_cu *cu, |
20552 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
20553 | int line_has_non_zero_discriminator, |
20554 | struct subfile *last_subfile) | |
20555 | { | |
804d2729 | 20556 | if (cu->builder->get_current_subfile () != last_subfile) |
a05a36a5 DE |
20557 | return 1; |
20558 | if (line != last_line) | |
20559 | return 1; | |
20560 | /* Same line for the same file that we've seen already. | |
20561 | As a last check, for pr 17276, only record the line if the line | |
20562 | has never had a non-zero discriminator. */ | |
20563 | if (!line_has_non_zero_discriminator) | |
20564 | return 1; | |
20565 | return 0; | |
20566 | } | |
20567 | ||
804d2729 TT |
20568 | /* Use the CU's builder to record line number LINE beginning at |
20569 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20570 | |
20571 | static void | |
d9b3de22 DE |
20572 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
20573 | unsigned int line, CORE_ADDR address, | |
804d2729 | 20574 | struct dwarf2_cu *cu) |
252a6764 DE |
20575 | { |
20576 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20577 | ||
27e0867f DE |
20578 | if (dwarf_line_debug) |
20579 | { | |
20580 | fprintf_unfiltered (gdb_stdlog, | |
20581 | "Recording line %u, file %s, address %s\n", | |
20582 | line, lbasename (subfile->name), | |
20583 | paddress (gdbarch, address)); | |
20584 | } | |
20585 | ||
804d2729 TT |
20586 | if (cu != nullptr) |
20587 | cu->builder->record_line (subfile, line, addr); | |
252a6764 DE |
20588 | } |
20589 | ||
20590 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20591 | Mark the end of a set of line number records. | |
d9b3de22 | 20592 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20593 | If SUBFILE is NULL the request is ignored. */ |
20594 | ||
20595 | static void | |
20596 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 20597 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 20598 | { |
27e0867f DE |
20599 | if (subfile == NULL) |
20600 | return; | |
20601 | ||
20602 | if (dwarf_line_debug) | |
20603 | { | |
20604 | fprintf_unfiltered (gdb_stdlog, | |
20605 | "Finishing current line, file %s, address %s\n", | |
20606 | lbasename (subfile->name), | |
20607 | paddress (gdbarch, address)); | |
20608 | } | |
20609 | ||
804d2729 | 20610 | dwarf_record_line_1 (gdbarch, subfile, 0, address, cu); |
d9b3de22 DE |
20611 | } |
20612 | ||
6f77053d PA |
20613 | void |
20614 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20615 | { |
d9b3de22 DE |
20616 | if (dwarf_line_debug) |
20617 | { | |
20618 | fprintf_unfiltered (gdb_stdlog, | |
20619 | "Processing actual line %u: file %u," | |
20620 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
20621 | m_line, to_underlying (m_file), |
20622 | paddress (m_gdbarch, m_address), | |
20623 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
20624 | } |
20625 | ||
6f77053d | 20626 | file_entry *fe = current_file (); |
8c43009f PA |
20627 | |
20628 | if (fe == NULL) | |
d9b3de22 DE |
20629 | dwarf2_debug_line_missing_file_complaint (); |
20630 | /* For now we ignore lines not starting on an instruction boundary. | |
20631 | But not when processing end_sequence for compatibility with the | |
20632 | previous version of the code. */ | |
6f77053d | 20633 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20634 | { |
8c43009f | 20635 | fe->included_p = 1; |
6f77053d | 20636 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 20637 | { |
804d2729 TT |
20638 | if (m_last_subfile != m_cu->builder->get_current_subfile () |
20639 | || end_sequence) | |
d9b3de22 | 20640 | { |
804d2729 TT |
20641 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
20642 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
20643 | } |
20644 | ||
20645 | if (!end_sequence) | |
20646 | { | |
804d2729 | 20647 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
20648 | m_line_has_non_zero_discriminator, |
20649 | m_last_subfile)) | |
d9b3de22 | 20650 | { |
804d2729 TT |
20651 | dwarf_record_line_1 (m_gdbarch, |
20652 | m_cu->builder->get_current_subfile (), | |
6f77053d | 20653 | m_line, m_address, |
804d2729 | 20654 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 20655 | } |
804d2729 | 20656 | m_last_subfile = m_cu->builder->get_current_subfile (); |
6f77053d | 20657 | m_last_line = m_line; |
d9b3de22 DE |
20658 | } |
20659 | } | |
20660 | } | |
20661 | } | |
20662 | ||
804d2729 TT |
20663 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
20664 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 20665 | { |
804d2729 | 20666 | m_cu = cu; |
6f77053d PA |
20667 | m_gdbarch = arch; |
20668 | m_record_lines_p = record_lines_p; | |
20669 | m_line_header = lh; | |
d9b3de22 | 20670 | |
804d2729 | 20671 | m_currently_recording_lines = true; |
d9b3de22 | 20672 | |
d9b3de22 DE |
20673 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
20674 | was a line entry for it so that the backend has a chance to adjust it | |
20675 | and also record it in case it needs it. This is currently used by MIPS | |
20676 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
20677 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
20678 | m_is_stmt = lh->default_is_stmt; | |
20679 | m_discriminator = 0; | |
252a6764 DE |
20680 | } |
20681 | ||
6f77053d PA |
20682 | void |
20683 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
20684 | const gdb_byte *line_ptr, | |
7ab6656f | 20685 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 20686 | { |
7ab6656f OJ |
20687 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
20688 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
20689 | values of zero to preserve GDB's previous behaviour which is to handle | |
20690 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 20691 | |
7ab6656f | 20692 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
20693 | { |
20694 | /* This line table is for a function which has been | |
20695 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20696 | ||
518817b3 | 20697 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
20698 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
20699 | ||
b98664d3 | 20700 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 20701 | line_offset, objfile_name (objfile)); |
804d2729 TT |
20702 | m_currently_recording_lines = false; |
20703 | /* Note: m_currently_recording_lines is left as false until we see | |
20704 | DW_LNE_end_sequence. */ | |
924c2928 DE |
20705 | } |
20706 | } | |
20707 | ||
f3f5162e | 20708 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20709 | Process the line number information in LH. |
20710 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20711 | program in order to set included_p for every referenced header. */ | |
debd256d | 20712 | |
c906108c | 20713 | static void |
43f3e411 DE |
20714 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20715 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20716 | { |
d521ce57 TT |
20717 | const gdb_byte *line_ptr, *extended_end; |
20718 | const gdb_byte *line_end; | |
a8c50c1f | 20719 | unsigned int bytes_read, extended_len; |
699ca60a | 20720 | unsigned char op_code, extended_op; |
e142c38c | 20721 | CORE_ADDR baseaddr; |
518817b3 | 20722 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20723 | bfd *abfd = objfile->obfd; |
fbf65064 | 20724 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
20725 | /* True if we're recording line info (as opposed to building partial |
20726 | symtabs and just interested in finding include files mentioned by | |
20727 | the line number program). */ | |
20728 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
20729 | |
20730 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 20731 | |
debd256d JB |
20732 | line_ptr = lh->statement_program_start; |
20733 | line_end = lh->statement_program_end; | |
c906108c SS |
20734 | |
20735 | /* Read the statement sequences until there's nothing left. */ | |
20736 | while (line_ptr < line_end) | |
20737 | { | |
6f77053d PA |
20738 | /* The DWARF line number program state machine. Reset the state |
20739 | machine at the start of each sequence. */ | |
804d2729 | 20740 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 20741 | bool end_sequence = false; |
d9b3de22 | 20742 | |
8c43009f | 20743 | if (record_lines_p) |
c906108c | 20744 | { |
8c43009f PA |
20745 | /* Start a subfile for the current file of the state |
20746 | machine. */ | |
20747 | const file_entry *fe = state_machine.current_file (); | |
20748 | ||
20749 | if (fe != NULL) | |
804d2729 | 20750 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
20751 | } |
20752 | ||
a738430d | 20753 | /* Decode the table. */ |
d9b3de22 | 20754 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20755 | { |
20756 | op_code = read_1_byte (abfd, line_ptr); | |
20757 | line_ptr += 1; | |
9aa1fe7e | 20758 | |
debd256d | 20759 | if (op_code >= lh->opcode_base) |
6e70227d | 20760 | { |
8e07a239 | 20761 | /* Special opcode. */ |
6f77053d | 20762 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20763 | } |
20764 | else switch (op_code) | |
c906108c SS |
20765 | { |
20766 | case DW_LNS_extended_op: | |
3e43a32a MS |
20767 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20768 | &bytes_read); | |
473b7be6 | 20769 | line_ptr += bytes_read; |
a8c50c1f | 20770 | extended_end = line_ptr + extended_len; |
c906108c SS |
20771 | extended_op = read_1_byte (abfd, line_ptr); |
20772 | line_ptr += 1; | |
20773 | switch (extended_op) | |
20774 | { | |
20775 | case DW_LNE_end_sequence: | |
6f77053d PA |
20776 | state_machine.handle_end_sequence (); |
20777 | end_sequence = true; | |
c906108c SS |
20778 | break; |
20779 | case DW_LNE_set_address: | |
d9b3de22 DE |
20780 | { |
20781 | CORE_ADDR address | |
20782 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 20783 | line_ptr += bytes_read; |
6f77053d PA |
20784 | |
20785 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 20786 | lowpc - baseaddr, address); |
6f77053d | 20787 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 20788 | } |
c906108c SS |
20789 | break; |
20790 | case DW_LNE_define_file: | |
debd256d | 20791 | { |
d521ce57 | 20792 | const char *cur_file; |
ecfb656c PA |
20793 | unsigned int mod_time, length; |
20794 | dir_index dindex; | |
6e70227d | 20795 | |
3e43a32a MS |
20796 | cur_file = read_direct_string (abfd, line_ptr, |
20797 | &bytes_read); | |
debd256d | 20798 | line_ptr += bytes_read; |
ecfb656c | 20799 | dindex = (dir_index) |
debd256d JB |
20800 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20801 | line_ptr += bytes_read; | |
20802 | mod_time = | |
20803 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20804 | line_ptr += bytes_read; | |
20805 | length = | |
20806 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20807 | line_ptr += bytes_read; | |
ecfb656c | 20808 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20809 | } |
c906108c | 20810 | break; |
d0c6ba3d | 20811 | case DW_LNE_set_discriminator: |
6f77053d PA |
20812 | { |
20813 | /* The discriminator is not interesting to the | |
20814 | debugger; just ignore it. We still need to | |
20815 | check its value though: | |
20816 | if there are consecutive entries for the same | |
20817 | (non-prologue) line we want to coalesce them. | |
20818 | PR 17276. */ | |
20819 | unsigned int discr | |
20820 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20821 | line_ptr += bytes_read; | |
20822 | ||
20823 | state_machine.handle_set_discriminator (discr); | |
20824 | } | |
d0c6ba3d | 20825 | break; |
c906108c | 20826 | default: |
b98664d3 | 20827 | complaint (_("mangled .debug_line section")); |
debd256d | 20828 | return; |
c906108c | 20829 | } |
a8c50c1f DJ |
20830 | /* Make sure that we parsed the extended op correctly. If e.g. |
20831 | we expected a different address size than the producer used, | |
20832 | we may have read the wrong number of bytes. */ | |
20833 | if (line_ptr != extended_end) | |
20834 | { | |
b98664d3 | 20835 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
20836 | return; |
20837 | } | |
c906108c SS |
20838 | break; |
20839 | case DW_LNS_copy: | |
6f77053d | 20840 | state_machine.handle_copy (); |
c906108c SS |
20841 | break; |
20842 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20843 | { |
20844 | CORE_ADDR adjust | |
20845 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20846 | line_ptr += bytes_read; |
6f77053d PA |
20847 | |
20848 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20849 | } |
c906108c SS |
20850 | break; |
20851 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20852 | { |
20853 | int line_delta | |
20854 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20855 | line_ptr += bytes_read; |
6f77053d PA |
20856 | |
20857 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20858 | } |
c906108c SS |
20859 | break; |
20860 | case DW_LNS_set_file: | |
d9b3de22 | 20861 | { |
6f77053d | 20862 | file_name_index file |
ecfb656c PA |
20863 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20864 | &bytes_read); | |
d9b3de22 | 20865 | line_ptr += bytes_read; |
8c43009f | 20866 | |
6f77053d | 20867 | state_machine.handle_set_file (file); |
d9b3de22 | 20868 | } |
c906108c SS |
20869 | break; |
20870 | case DW_LNS_set_column: | |
0ad93d4f | 20871 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20872 | line_ptr += bytes_read; |
20873 | break; | |
20874 | case DW_LNS_negate_stmt: | |
6f77053d | 20875 | state_machine.handle_negate_stmt (); |
c906108c SS |
20876 | break; |
20877 | case DW_LNS_set_basic_block: | |
c906108c | 20878 | break; |
c2c6d25f JM |
20879 | /* Add to the address register of the state machine the |
20880 | address increment value corresponding to special opcode | |
a738430d MK |
20881 | 255. I.e., this value is scaled by the minimum |
20882 | instruction length since special opcode 255 would have | |
b021a221 | 20883 | scaled the increment. */ |
c906108c | 20884 | case DW_LNS_const_add_pc: |
6f77053d | 20885 | state_machine.handle_const_add_pc (); |
c906108c SS |
20886 | break; |
20887 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20888 | { |
6f77053d | 20889 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20890 | line_ptr += 2; |
6f77053d PA |
20891 | |
20892 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20893 | } |
c906108c | 20894 | break; |
9aa1fe7e | 20895 | default: |
a738430d MK |
20896 | { |
20897 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20898 | int i; |
a738430d | 20899 | |
debd256d | 20900 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20901 | { |
20902 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20903 | line_ptr += bytes_read; | |
20904 | } | |
20905 | } | |
c906108c SS |
20906 | } |
20907 | } | |
d9b3de22 DE |
20908 | |
20909 | if (!end_sequence) | |
20910 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20911 | ||
20912 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20913 | in which case we still finish recording the last line). */ | |
6f77053d | 20914 | state_machine.record_line (true); |
c906108c | 20915 | } |
f3f5162e DE |
20916 | } |
20917 | ||
20918 | /* Decode the Line Number Program (LNP) for the given line_header | |
20919 | structure and CU. The actual information extracted and the type | |
20920 | of structures created from the LNP depends on the value of PST. | |
20921 | ||
20922 | 1. If PST is NULL, then this procedure uses the data from the program | |
20923 | to create all necessary symbol tables, and their linetables. | |
20924 | ||
20925 | 2. If PST is not NULL, this procedure reads the program to determine | |
20926 | the list of files included by the unit represented by PST, and | |
20927 | builds all the associated partial symbol tables. | |
20928 | ||
20929 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20930 | It is used for relative paths in the line table. | |
20931 | NOTE: When processing partial symtabs (pst != NULL), | |
20932 | comp_dir == pst->dirname. | |
20933 | ||
20934 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20935 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20936 | symtab we don't use it in the name of the psymtabs we create. | |
20937 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20938 | A good testcase for this is mb-inline.exp. |
20939 | ||
527f3840 JK |
20940 | LOWPC is the lowest address in CU (or 0 if not known). |
20941 | ||
20942 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20943 | for its PC<->lines mapping information. Otherwise only the filename | |
20944 | table is read in. */ | |
f3f5162e DE |
20945 | |
20946 | static void | |
20947 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 20948 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 20949 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 20950 | { |
518817b3 | 20951 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20952 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 20953 | |
527f3840 JK |
20954 | if (decode_mapping) |
20955 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20956 | |
20957 | if (decode_for_pst_p) | |
20958 | { | |
20959 | int file_index; | |
20960 | ||
20961 | /* Now that we're done scanning the Line Header Program, we can | |
20962 | create the psymtab of each included file. */ | |
fff8551c | 20963 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
20964 | if (lh->file_names[file_index].included_p == 1) |
20965 | { | |
c89b44cd | 20966 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 20967 | const char *include_name = |
c89b44cd TT |
20968 | psymtab_include_file_name (lh, file_index, pst, comp_dir, |
20969 | &name_holder); | |
c6da4cef | 20970 | if (include_name != NULL) |
aaa75496 JB |
20971 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20972 | } | |
20973 | } | |
cb1df416 DJ |
20974 | else |
20975 | { | |
20976 | /* Make sure a symtab is created for every file, even files | |
20977 | which contain only variables (i.e. no code with associated | |
20978 | line numbers). */ | |
804d2729 | 20979 | struct compunit_symtab *cust = cu->builder->get_compunit_symtab (); |
cb1df416 | 20980 | int i; |
cb1df416 | 20981 | |
fff8551c | 20982 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 20983 | { |
8c43009f | 20984 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 20985 | |
804d2729 | 20986 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
cb1df416 | 20987 | |
804d2729 | 20988 | if (cu->builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 20989 | { |
804d2729 TT |
20990 | cu->builder->get_current_subfile ()->symtab |
20991 | = allocate_symtab (cust, | |
20992 | cu->builder->get_current_subfile ()->name); | |
43f3e411 | 20993 | } |
804d2729 | 20994 | fe.symtab = cu->builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
20995 | } |
20996 | } | |
c906108c SS |
20997 | } |
20998 | ||
20999 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21000 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21001 | or NULL if not known. |
c906108c SS |
21002 | This routine tries to keep line numbers from identical absolute and |
21003 | relative file names in a common subfile. | |
21004 | ||
21005 | Using the `list' example from the GDB testsuite, which resides in | |
21006 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21007 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21008 | ||
c5aa993b | 21009 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21010 | DW_AT_comp_dir: /compdir |
357e46e7 | 21011 | files.files[0].name: list0.h |
c5aa993b | 21012 | files.files[0].dir: /srcdir |
357e46e7 | 21013 | files.files[1].name: list0.c |
c5aa993b | 21014 | files.files[1].dir: /srcdir |
c906108c SS |
21015 | |
21016 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21017 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21018 | start_subfile will ensure that this happens provided that we pass the | |
21019 | concatenation of files.files[1].dir and files.files[1].name as the | |
21020 | subfile's name. */ | |
c906108c SS |
21021 | |
21022 | static void | |
804d2729 TT |
21023 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21024 | const char *dirname) | |
c906108c | 21025 | { |
d521ce57 | 21026 | char *copy = NULL; |
4f1520fb | 21027 | |
4d663531 | 21028 | /* In order not to lose the line information directory, |
4f1520fb FR |
21029 | we concatenate it to the filename when it makes sense. |
21030 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21031 | information): ``The directory index is ignored for file names | |
21032 | that represent full path names''. Thus ignoring dirname in the | |
21033 | `else' branch below isn't an issue. */ | |
c906108c | 21034 | |
d5166ae1 | 21035 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
21036 | { |
21037 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
21038 | filename = copy; | |
21039 | } | |
c906108c | 21040 | |
804d2729 | 21041 | cu->builder->start_subfile (filename); |
4f1520fb | 21042 | |
d521ce57 TT |
21043 | if (copy != NULL) |
21044 | xfree (copy); | |
c906108c SS |
21045 | } |
21046 | ||
804d2729 TT |
21047 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
21048 | buildsym_compunit constructor. */ | |
f4dc4d17 | 21049 | |
43f3e411 | 21050 | static struct compunit_symtab * |
f4dc4d17 | 21051 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 21052 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 21053 | { |
804d2729 | 21054 | gdb_assert (cu->builder == nullptr); |
43f3e411 | 21055 | |
804d2729 TT |
21056 | cu->builder.reset (new struct buildsym_compunit |
21057 | (cu->per_cu->dwarf2_per_objfile->objfile, | |
21058 | name, comp_dir, cu->language, low_pc)); | |
93b8bea4 | 21059 | |
804d2729 TT |
21060 | cu->list_in_scope = cu->builder->get_file_symbols (); |
21061 | ||
21062 | cu->builder->record_debugformat ("DWARF 2"); | |
21063 | cu->builder->record_producer (cu->producer); | |
f4dc4d17 | 21064 | |
4d4ec4e5 | 21065 | cu->processing_has_namespace_info = 0; |
43f3e411 | 21066 | |
804d2729 | 21067 | return cu->builder->get_compunit_symtab (); |
f4dc4d17 DE |
21068 | } |
21069 | ||
4c2df51b DJ |
21070 | static void |
21071 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21072 | struct dwarf2_cu *cu) |
4c2df51b | 21073 | { |
518817b3 | 21074 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
21075 | struct comp_unit_head *cu_header = &cu->header; |
21076 | ||
4c2df51b DJ |
21077 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21078 | code here to turn a symbol with DW_AT_external and a | |
21079 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21080 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21081 | with some versions of binutils) where shared libraries could have | |
21082 | relocations against symbols in their debug information - the | |
21083 | minimal symbol would have the right address, but the debug info | |
21084 | would not. It's no longer necessary, because we will explicitly | |
21085 | apply relocations when we read in the debug information now. */ | |
21086 | ||
21087 | /* A DW_AT_location attribute with no contents indicates that a | |
21088 | variable has been optimized away. */ | |
21089 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
21090 | { | |
f1e6e072 | 21091 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21092 | return; |
21093 | } | |
21094 | ||
21095 | /* Handle one degenerate form of location expression specially, to | |
21096 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
21097 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
21098 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
21099 | |
21100 | if (attr_form_is_block (attr) | |
3019eac3 DE |
21101 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
21102 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
21103 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
21104 | && (DW_BLOCK (attr)->size | |
21105 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 21106 | { |
891d2f0b | 21107 | unsigned int dummy; |
4c2df51b | 21108 | |
3019eac3 DE |
21109 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
21110 | SYMBOL_VALUE_ADDRESS (sym) = | |
21111 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
21112 | else | |
21113 | SYMBOL_VALUE_ADDRESS (sym) = | |
21114 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 21115 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
21116 | fixup_symbol_section (sym, objfile); |
21117 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
21118 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
21119 | return; |
21120 | } | |
21121 | ||
21122 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21123 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21124 | (i.e. when the value of a register or memory location is | |
21125 | referenced, or a thread-local block, etc.). Then again, it might | |
21126 | not be worthwhile. I'm assuming that it isn't unless performance | |
21127 | or memory numbers show me otherwise. */ | |
21128 | ||
f1e6e072 | 21129 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21130 | |
f1e6e072 | 21131 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 21132 | cu->has_loclist = 1; |
4c2df51b DJ |
21133 | } |
21134 | ||
c906108c SS |
21135 | /* Given a pointer to a DWARF information entry, figure out if we need |
21136 | to make a symbol table entry for it, and if so, create a new entry | |
21137 | and return a pointer to it. | |
21138 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21139 | used the passed type. |
21140 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21141 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21142 | |
21143 | static struct symbol * | |
5e2db402 TT |
21144 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21145 | struct symbol *space) | |
c906108c | 21146 | { |
518817b3 SM |
21147 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21148 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21149 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 21150 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 21151 | struct symbol *sym = NULL; |
15d034d0 | 21152 | const char *name; |
c906108c SS |
21153 | struct attribute *attr = NULL; |
21154 | struct attribute *attr2 = NULL; | |
e142c38c | 21155 | CORE_ADDR baseaddr; |
e37fd15a SW |
21156 | struct pending **list_to_add = NULL; |
21157 | ||
edb3359d | 21158 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
21159 | |
21160 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21161 | |
94af9270 | 21162 | name = dwarf2_name (die, cu); |
c906108c SS |
21163 | if (name) |
21164 | { | |
94af9270 | 21165 | const char *linkagename; |
34eaf542 | 21166 | int suppress_add = 0; |
94af9270 | 21167 | |
34eaf542 TT |
21168 | if (space) |
21169 | sym = space; | |
21170 | else | |
e623cf5d | 21171 | sym = allocate_symbol (objfile); |
c906108c | 21172 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21173 | |
21174 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 21175 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
21176 | linkagename = dwarf2_physname (name, die, cu); |
21177 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 21178 | |
f55ee35c JK |
21179 | /* Fortran does not have mangling standard and the mangling does differ |
21180 | between gfortran, iFort etc. */ | |
21181 | if (cu->language == language_fortran | |
b250c185 | 21182 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 21183 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 21184 | dwarf2_full_name (name, die, cu), |
29df156d | 21185 | NULL); |
f55ee35c | 21186 | |
c906108c | 21187 | /* Default assumptions. |
c5aa993b | 21188 | Use the passed type or decode it from the die. */ |
176620f1 | 21189 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21190 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21191 | if (type != NULL) |
21192 | SYMBOL_TYPE (sym) = type; | |
21193 | else | |
e7c27a73 | 21194 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21195 | attr = dwarf2_attr (die, |
21196 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21197 | cu); | |
c906108c SS |
21198 | if (attr) |
21199 | { | |
21200 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
21201 | } | |
cb1df416 | 21202 | |
edb3359d DJ |
21203 | attr = dwarf2_attr (die, |
21204 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21205 | cu); | |
cb1df416 DJ |
21206 | if (attr) |
21207 | { | |
ecfb656c | 21208 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 21209 | struct file_entry *fe; |
9a619af0 | 21210 | |
ecfb656c PA |
21211 | if (cu->line_header != NULL) |
21212 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21213 | else |
21214 | fe = NULL; | |
21215 | ||
21216 | if (fe == NULL) | |
b98664d3 | 21217 | complaint (_("file index out of range")); |
8c43009f PA |
21218 | else |
21219 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21220 | } |
21221 | ||
c906108c SS |
21222 | switch (die->tag) |
21223 | { | |
21224 | case DW_TAG_label: | |
e142c38c | 21225 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 21226 | if (attr) |
3e29f34a MR |
21227 | { |
21228 | CORE_ADDR addr; | |
21229 | ||
21230 | addr = attr_value_as_address (attr); | |
21231 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
21232 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
21233 | } | |
0f5238ed TT |
21234 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21235 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 21236 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
380618d6 | 21237 | dw2_add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21238 | break; |
21239 | case DW_TAG_subprogram: | |
21240 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21241 | finish_block. */ | |
f1e6e072 | 21242 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21243 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
21244 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
21245 | || cu->language == language_ada) | |
c906108c | 21246 | { |
2cfa0c8d JB |
21247 | /* Subprograms marked external are stored as a global symbol. |
21248 | Ada subprograms, whether marked external or not, are always | |
21249 | stored as a global symbol, because we want to be able to | |
21250 | access them globally. For instance, we want to be able | |
21251 | to break on a nested subprogram without having to | |
21252 | specify the context. */ | |
804d2729 | 21253 | list_to_add = cu->builder->get_global_symbols (); |
c906108c SS |
21254 | } |
21255 | else | |
21256 | { | |
e37fd15a | 21257 | list_to_add = cu->list_in_scope; |
c906108c SS |
21258 | } |
21259 | break; | |
edb3359d DJ |
21260 | case DW_TAG_inlined_subroutine: |
21261 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21262 | finish_block. */ | |
f1e6e072 | 21263 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21264 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21265 | list_to_add = cu->list_in_scope; |
edb3359d | 21266 | break; |
34eaf542 TT |
21267 | case DW_TAG_template_value_param: |
21268 | suppress_add = 1; | |
21269 | /* Fall through. */ | |
72929c62 | 21270 | case DW_TAG_constant: |
c906108c | 21271 | case DW_TAG_variable: |
254e6b9e | 21272 | case DW_TAG_member: |
0963b4bd MS |
21273 | /* Compilation with minimal debug info may result in |
21274 | variables with missing type entries. Change the | |
21275 | misleading `void' type to something sensible. */ | |
c906108c | 21276 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 21277 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21278 | |
e142c38c | 21279 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21280 | /* In the case of DW_TAG_member, we should only be called for |
21281 | static const members. */ | |
21282 | if (die->tag == DW_TAG_member) | |
21283 | { | |
3863f96c DE |
21284 | /* dwarf2_add_field uses die_is_declaration, |
21285 | so we do the same. */ | |
254e6b9e DE |
21286 | gdb_assert (die_is_declaration (die, cu)); |
21287 | gdb_assert (attr); | |
21288 | } | |
c906108c SS |
21289 | if (attr) |
21290 | { | |
e7c27a73 | 21291 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21292 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21293 | if (!suppress_add) |
34eaf542 TT |
21294 | { |
21295 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
804d2729 | 21296 | list_to_add = cu->builder->get_global_symbols (); |
34eaf542 | 21297 | else |
e37fd15a | 21298 | list_to_add = cu->list_in_scope; |
34eaf542 | 21299 | } |
c906108c SS |
21300 | break; |
21301 | } | |
e142c38c | 21302 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
21303 | if (attr) |
21304 | { | |
e7c27a73 | 21305 | var_decode_location (attr, sym, cu); |
e142c38c | 21306 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21307 | |
21308 | /* Fortran explicitly imports any global symbols to the local | |
21309 | scope by DW_TAG_common_block. */ | |
21310 | if (cu->language == language_fortran && die->parent | |
21311 | && die->parent->tag == DW_TAG_common_block) | |
21312 | attr2 = NULL; | |
21313 | ||
caac4577 JG |
21314 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21315 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
21316 | && !dwarf2_per_objfile->has_section_at_zero) | |
21317 | { | |
21318 | /* When a static variable is eliminated by the linker, | |
21319 | the corresponding debug information is not stripped | |
21320 | out, but the variable address is set to null; | |
21321 | do not add such variables into symbol table. */ | |
21322 | } | |
21323 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 21324 | { |
f55ee35c JK |
21325 | /* Workaround gfortran PR debug/40040 - it uses |
21326 | DW_AT_location for variables in -fPIC libraries which may | |
21327 | get overriden by other libraries/executable and get | |
21328 | a different address. Resolve it by the minimal symbol | |
21329 | which may come from inferior's executable using copy | |
21330 | relocation. Make this workaround only for gfortran as for | |
21331 | other compilers GDB cannot guess the minimal symbol | |
21332 | Fortran mangling kind. */ | |
21333 | if (cu->language == language_fortran && die->parent | |
21334 | && die->parent->tag == DW_TAG_module | |
21335 | && cu->producer | |
28586665 | 21336 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 21337 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 21338 | |
1c809c68 TT |
21339 | /* A variable with DW_AT_external is never static, |
21340 | but it may be block-scoped. */ | |
804d2729 TT |
21341 | list_to_add |
21342 | = (cu->list_in_scope == cu->builder->get_file_symbols () | |
21343 | ? cu->builder->get_global_symbols () | |
21344 | : cu->list_in_scope); | |
1c809c68 | 21345 | } |
c906108c | 21346 | else |
e37fd15a | 21347 | list_to_add = cu->list_in_scope; |
c906108c SS |
21348 | } |
21349 | else | |
21350 | { | |
21351 | /* We do not know the address of this symbol. | |
c5aa993b JM |
21352 | If it is an external symbol and we have type information |
21353 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21354 | The address of the variable will then be determined from | |
21355 | the minimal symbol table whenever the variable is | |
21356 | referenced. */ | |
e142c38c | 21357 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21358 | |
21359 | /* Fortran explicitly imports any global symbols to the local | |
21360 | scope by DW_TAG_common_block. */ | |
21361 | if (cu->language == language_fortran && die->parent | |
21362 | && die->parent->tag == DW_TAG_common_block) | |
21363 | { | |
21364 | /* SYMBOL_CLASS doesn't matter here because | |
21365 | read_common_block is going to reset it. */ | |
21366 | if (!suppress_add) | |
21367 | list_to_add = cu->list_in_scope; | |
21368 | } | |
21369 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
21370 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 21371 | { |
0fe7935b DJ |
21372 | /* A variable with DW_AT_external is never static, but it |
21373 | may be block-scoped. */ | |
804d2729 TT |
21374 | list_to_add |
21375 | = (cu->list_in_scope == cu->builder->get_file_symbols () | |
21376 | ? cu->builder->get_global_symbols () | |
21377 | : cu->list_in_scope); | |
0fe7935b | 21378 | |
f1e6e072 | 21379 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21380 | } |
442ddf59 JK |
21381 | else if (!die_is_declaration (die, cu)) |
21382 | { | |
21383 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21384 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21385 | if (!suppress_add) |
21386 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21387 | } |
c906108c SS |
21388 | } |
21389 | break; | |
21390 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
21391 | { |
21392 | /* If we are inside a function, mark this as an argument. If | |
21393 | not, we might be looking at an argument to an inlined function | |
21394 | when we do not have enough information to show inlined frames; | |
21395 | pretend it's a local variable in that case so that the user can | |
21396 | still see it. */ | |
804d2729 TT |
21397 | struct context_stack *curr |
21398 | = cu->builder->get_current_context_stack (); | |
a60f3166 TT |
21399 | if (curr != nullptr && curr->name != nullptr) |
21400 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
21401 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21402 | if (attr) | |
21403 | { | |
21404 | var_decode_location (attr, sym, cu); | |
21405 | } | |
21406 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21407 | if (attr) | |
21408 | { | |
21409 | dwarf2_const_value (attr, sym, cu); | |
21410 | } | |
f346a30d | 21411 | |
a60f3166 TT |
21412 | list_to_add = cu->list_in_scope; |
21413 | } | |
c906108c SS |
21414 | break; |
21415 | case DW_TAG_unspecified_parameters: | |
21416 | /* From varargs functions; gdb doesn't seem to have any | |
21417 | interest in this information, so just ignore it for now. | |
21418 | (FIXME?) */ | |
21419 | break; | |
34eaf542 TT |
21420 | case DW_TAG_template_type_param: |
21421 | suppress_add = 1; | |
21422 | /* Fall through. */ | |
c906108c | 21423 | case DW_TAG_class_type: |
680b30c7 | 21424 | case DW_TAG_interface_type: |
c906108c SS |
21425 | case DW_TAG_structure_type: |
21426 | case DW_TAG_union_type: | |
72019c9c | 21427 | case DW_TAG_set_type: |
c906108c | 21428 | case DW_TAG_enumeration_type: |
f1e6e072 | 21429 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21430 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21431 | |
63d06c5c | 21432 | { |
9c37b5ae | 21433 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21434 | really ever be static objects: otherwise, if you try |
21435 | to, say, break of a class's method and you're in a file | |
21436 | which doesn't mention that class, it won't work unless | |
21437 | the check for all static symbols in lookup_symbol_aux | |
21438 | saves you. See the OtherFileClass tests in | |
21439 | gdb.c++/namespace.exp. */ | |
21440 | ||
e37fd15a | 21441 | if (!suppress_add) |
34eaf542 | 21442 | { |
804d2729 TT |
21443 | list_to_add |
21444 | = (cu->list_in_scope == cu->builder->get_file_symbols () | |
21445 | && cu->language == language_cplus | |
21446 | ? cu->builder->get_global_symbols () | |
21447 | : cu->list_in_scope); | |
63d06c5c | 21448 | |
64382290 | 21449 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21450 | ... }" also defines a typedef for "foo". */ |
64382290 | 21451 | if (cu->language == language_cplus |
45280282 | 21452 | || cu->language == language_ada |
c44af4eb TT |
21453 | || cu->language == language_d |
21454 | || cu->language == language_rust) | |
64382290 TT |
21455 | { |
21456 | /* The symbol's name is already allocated along | |
21457 | with this objfile, so we don't need to | |
21458 | duplicate it for the type. */ | |
21459 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
21460 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
21461 | } | |
63d06c5c DC |
21462 | } |
21463 | } | |
c906108c SS |
21464 | break; |
21465 | case DW_TAG_typedef: | |
f1e6e072 | 21466 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21467 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21468 | list_to_add = cu->list_in_scope; |
63d06c5c | 21469 | break; |
c906108c | 21470 | case DW_TAG_base_type: |
a02abb62 | 21471 | case DW_TAG_subrange_type: |
f1e6e072 | 21472 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21473 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21474 | list_to_add = cu->list_in_scope; |
c906108c SS |
21475 | break; |
21476 | case DW_TAG_enumerator: | |
e142c38c | 21477 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
21478 | if (attr) |
21479 | { | |
e7c27a73 | 21480 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21481 | } |
63d06c5c DC |
21482 | { |
21483 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21484 | DW_TAG_class_type, etc. block. */ | |
21485 | ||
804d2729 TT |
21486 | list_to_add |
21487 | = (cu->list_in_scope == cu->builder->get_file_symbols () | |
21488 | && cu->language == language_cplus | |
21489 | ? cu->builder->get_global_symbols () | |
21490 | : cu->list_in_scope); | |
63d06c5c | 21491 | } |
c906108c | 21492 | break; |
74921315 | 21493 | case DW_TAG_imported_declaration: |
5c4e30ca | 21494 | case DW_TAG_namespace: |
f1e6e072 | 21495 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
804d2729 | 21496 | list_to_add = cu->builder->get_global_symbols (); |
5c4e30ca | 21497 | break; |
530e8392 KB |
21498 | case DW_TAG_module: |
21499 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21500 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
804d2729 | 21501 | list_to_add = cu->builder->get_global_symbols (); |
530e8392 | 21502 | break; |
4357ac6c | 21503 | case DW_TAG_common_block: |
f1e6e072 | 21504 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 21505 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
380618d6 | 21506 | dw2_add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 21507 | break; |
c906108c SS |
21508 | default: |
21509 | /* Not a tag we recognize. Hopefully we aren't processing | |
21510 | trash data, but since we must specifically ignore things | |
21511 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21512 | this point. */ |
b98664d3 | 21513 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 21514 | dwarf_tag_name (die->tag)); |
c906108c SS |
21515 | break; |
21516 | } | |
df8a16a1 | 21517 | |
e37fd15a SW |
21518 | if (suppress_add) |
21519 | { | |
21520 | sym->hash_next = objfile->template_symbols; | |
21521 | objfile->template_symbols = sym; | |
21522 | list_to_add = NULL; | |
21523 | } | |
21524 | ||
21525 | if (list_to_add != NULL) | |
380618d6 | 21526 | dw2_add_symbol_to_list (sym, list_to_add); |
e37fd15a | 21527 | |
df8a16a1 DJ |
21528 | /* For the benefit of old versions of GCC, check for anonymous |
21529 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21530 | if (!cu->processing_has_namespace_info |
94af9270 | 21531 | && cu->language == language_cplus) |
804d2729 | 21532 | cp_scan_for_anonymous_namespaces (cu->builder.get (), sym, objfile); |
c906108c SS |
21533 | } |
21534 | return (sym); | |
21535 | } | |
21536 | ||
98bfdba5 PA |
21537 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21538 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21539 | standard (v4) is not entirely clear about the meaning of using | |
21540 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21541 | wider than the data. The conclusion of a discussion on the DWARF | |
21542 | list was that this is unspecified. We choose to always zero-extend | |
21543 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21544 | |
98bfdba5 | 21545 | static gdb_byte * |
ff39bb5e | 21546 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21547 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21548 | { |
518817b3 | 21549 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
21550 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21551 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
21552 | LONGEST l = DW_UNSND (attr); |
21553 | ||
21554 | if (bits < sizeof (*value) * 8) | |
21555 | { | |
21556 | l &= ((LONGEST) 1 << bits) - 1; | |
21557 | *value = l; | |
21558 | } | |
21559 | else if (bits == sizeof (*value) * 8) | |
21560 | *value = l; | |
21561 | else | |
21562 | { | |
224c3ddb | 21563 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21564 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21565 | return bytes; | |
21566 | } | |
21567 | ||
21568 | return NULL; | |
21569 | } | |
21570 | ||
21571 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21572 | the value does not fit in *VALUE, set *BYTES - either already | |
21573 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21574 | or, set *BATON, if we translated the constant to a location | |
21575 | expression. */ | |
21576 | ||
21577 | static void | |
ff39bb5e | 21578 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21579 | const char *name, struct obstack *obstack, |
21580 | struct dwarf2_cu *cu, | |
d521ce57 | 21581 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21582 | struct dwarf2_locexpr_baton **baton) |
21583 | { | |
518817b3 | 21584 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 21585 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 21586 | struct dwarf_block *blk; |
98bfdba5 PA |
21587 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21588 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21589 | ||
21590 | *value = 0; | |
21591 | *bytes = NULL; | |
21592 | *baton = NULL; | |
c906108c SS |
21593 | |
21594 | switch (attr->form) | |
21595 | { | |
21596 | case DW_FORM_addr: | |
3019eac3 | 21597 | case DW_FORM_GNU_addr_index: |
ac56253d | 21598 | { |
ac56253d TT |
21599 | gdb_byte *data; |
21600 | ||
98bfdba5 PA |
21601 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21602 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21603 | cu_header->addr_size, |
98bfdba5 | 21604 | TYPE_LENGTH (type)); |
ac56253d TT |
21605 | /* Symbols of this form are reasonably rare, so we just |
21606 | piggyback on the existing location code rather than writing | |
21607 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21608 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
21609 | (*baton)->per_cu = cu->per_cu; |
21610 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 21611 | |
98bfdba5 | 21612 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 21613 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 21614 | (*baton)->data = data; |
ac56253d TT |
21615 | |
21616 | data[0] = DW_OP_addr; | |
21617 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
21618 | byte_order, DW_ADDR (attr)); | |
21619 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 21620 | } |
c906108c | 21621 | break; |
4ac36638 | 21622 | case DW_FORM_string: |
93b5768b | 21623 | case DW_FORM_strp: |
3019eac3 | 21624 | case DW_FORM_GNU_str_index: |
36586728 | 21625 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
21626 | /* DW_STRING is already allocated on the objfile obstack, point |
21627 | directly to it. */ | |
d521ce57 | 21628 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 21629 | break; |
c906108c SS |
21630 | case DW_FORM_block1: |
21631 | case DW_FORM_block2: | |
21632 | case DW_FORM_block4: | |
21633 | case DW_FORM_block: | |
2dc7f7b3 | 21634 | case DW_FORM_exprloc: |
0224619f | 21635 | case DW_FORM_data16: |
c906108c | 21636 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
21637 | if (TYPE_LENGTH (type) != blk->size) |
21638 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
21639 | TYPE_LENGTH (type)); | |
21640 | *bytes = blk->data; | |
c906108c | 21641 | break; |
2df3850c JM |
21642 | |
21643 | /* The DW_AT_const_value attributes are supposed to carry the | |
21644 | symbol's value "represented as it would be on the target | |
21645 | architecture." By the time we get here, it's already been | |
21646 | converted to host endianness, so we just need to sign- or | |
21647 | zero-extend it as appropriate. */ | |
21648 | case DW_FORM_data1: | |
3aef2284 | 21649 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21650 | break; |
c906108c | 21651 | case DW_FORM_data2: |
3aef2284 | 21652 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21653 | break; |
c906108c | 21654 | case DW_FORM_data4: |
3aef2284 | 21655 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21656 | break; |
c906108c | 21657 | case DW_FORM_data8: |
3aef2284 | 21658 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
21659 | break; |
21660 | ||
c906108c | 21661 | case DW_FORM_sdata: |
663c44ac | 21662 | case DW_FORM_implicit_const: |
98bfdba5 | 21663 | *value = DW_SND (attr); |
2df3850c JM |
21664 | break; |
21665 | ||
c906108c | 21666 | case DW_FORM_udata: |
98bfdba5 | 21667 | *value = DW_UNSND (attr); |
c906108c | 21668 | break; |
2df3850c | 21669 | |
c906108c | 21670 | default: |
b98664d3 | 21671 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 21672 | dwarf_form_name (attr->form)); |
98bfdba5 | 21673 | *value = 0; |
c906108c SS |
21674 | break; |
21675 | } | |
21676 | } | |
21677 | ||
2df3850c | 21678 | |
98bfdba5 PA |
21679 | /* Copy constant value from an attribute to a symbol. */ |
21680 | ||
2df3850c | 21681 | static void |
ff39bb5e | 21682 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 21683 | struct dwarf2_cu *cu) |
2df3850c | 21684 | { |
518817b3 | 21685 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 21686 | LONGEST value; |
d521ce57 | 21687 | const gdb_byte *bytes; |
98bfdba5 | 21688 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 21689 | |
98bfdba5 PA |
21690 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
21691 | SYMBOL_PRINT_NAME (sym), | |
21692 | &objfile->objfile_obstack, cu, | |
21693 | &value, &bytes, &baton); | |
2df3850c | 21694 | |
98bfdba5 PA |
21695 | if (baton != NULL) |
21696 | { | |
98bfdba5 | 21697 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21698 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21699 | } |
21700 | else if (bytes != NULL) | |
21701 | { | |
21702 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21703 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21704 | } |
21705 | else | |
21706 | { | |
21707 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21708 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21709 | } |
2df3850c JM |
21710 | } |
21711 | ||
c906108c SS |
21712 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21713 | ||
21714 | static struct type * | |
e7c27a73 | 21715 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21716 | { |
c906108c | 21717 | struct attribute *type_attr; |
c906108c | 21718 | |
e142c38c | 21719 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21720 | if (!type_attr) |
21721 | { | |
518817b3 | 21722 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21723 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 21724 | return objfile_type (objfile)->builtin_void; |
c906108c | 21725 | } |
348e048f | 21726 | |
673bfd45 | 21727 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21728 | } |
21729 | ||
b4ba55a1 JB |
21730 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21731 | that allows to find parallel types through that information instead | |
21732 | of having to do expensive parallel lookups by type name. */ | |
21733 | ||
21734 | static int | |
21735 | need_gnat_info (struct dwarf2_cu *cu) | |
21736 | { | |
de4cb04a JB |
21737 | /* Assume that the Ada compiler was GNAT, which always produces |
21738 | the auxiliary information. */ | |
21739 | return (cu->language == language_ada); | |
b4ba55a1 JB |
21740 | } |
21741 | ||
b4ba55a1 JB |
21742 | /* Return the auxiliary type of the die in question using its |
21743 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21744 | attribute is not present. */ | |
21745 | ||
21746 | static struct type * | |
21747 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21748 | { | |
b4ba55a1 | 21749 | struct attribute *type_attr; |
b4ba55a1 JB |
21750 | |
21751 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21752 | if (!type_attr) | |
21753 | return NULL; | |
21754 | ||
673bfd45 | 21755 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21756 | } |
21757 | ||
21758 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21759 | descriptive type accordingly. */ | |
21760 | ||
21761 | static void | |
21762 | set_descriptive_type (struct type *type, struct die_info *die, | |
21763 | struct dwarf2_cu *cu) | |
21764 | { | |
21765 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21766 | ||
21767 | if (descriptive_type) | |
21768 | { | |
21769 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21770 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21771 | } | |
21772 | } | |
21773 | ||
c906108c SS |
21774 | /* Return the containing type of the die in question using its |
21775 | DW_AT_containing_type attribute. */ | |
21776 | ||
21777 | static struct type * | |
e7c27a73 | 21778 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21779 | { |
c906108c | 21780 | struct attribute *type_attr; |
518817b3 | 21781 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21782 | |
e142c38c | 21783 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21784 | if (!type_attr) |
21785 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 21786 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 21787 | |
673bfd45 | 21788 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21789 | } |
21790 | ||
ac9ec31b DE |
21791 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21792 | ||
21793 | static struct type * | |
21794 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21795 | { | |
518817b3 SM |
21796 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21797 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
21798 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
21799 | char *message, *saved; | |
21800 | ||
9d8780f0 | 21801 | message = xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"), |
4262abfb | 21802 | objfile_name (objfile), |
9d8780f0 SM |
21803 | sect_offset_str (cu->header.sect_off), |
21804 | sect_offset_str (die->sect_off)); | |
224c3ddb SM |
21805 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
21806 | message, strlen (message)); | |
ac9ec31b DE |
21807 | xfree (message); |
21808 | ||
19f392bc | 21809 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21810 | } |
21811 | ||
673bfd45 | 21812 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21813 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21814 | DW_AT_containing_type. | |
673bfd45 DE |
21815 | If there is no type substitute an error marker. */ |
21816 | ||
c906108c | 21817 | static struct type * |
ff39bb5e | 21818 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21819 | struct dwarf2_cu *cu) |
c906108c | 21820 | { |
518817b3 SM |
21821 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21822 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21823 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
21824 | struct type *this_type; |
21825 | ||
ac9ec31b DE |
21826 | gdb_assert (attr->name == DW_AT_type |
21827 | || attr->name == DW_AT_GNAT_descriptive_type | |
21828 | || attr->name == DW_AT_containing_type); | |
21829 | ||
673bfd45 DE |
21830 | /* First see if we have it cached. */ |
21831 | ||
36586728 TT |
21832 | if (attr->form == DW_FORM_GNU_ref_alt) |
21833 | { | |
21834 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 21835 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 21836 | |
ed2dc618 SM |
21837 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
21838 | dwarf2_per_objfile); | |
9c541725 | 21839 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 21840 | } |
7771576e | 21841 | else if (attr_form_is_ref (attr)) |
673bfd45 | 21842 | { |
9c541725 | 21843 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 21844 | |
9c541725 | 21845 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21846 | } |
55f1336d | 21847 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21848 | { |
ac9ec31b | 21849 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21850 | |
ac9ec31b | 21851 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21852 | } |
21853 | else | |
21854 | { | |
b98664d3 | 21855 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
21856 | " at %s [in module %s]"), |
21857 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 21858 | objfile_name (objfile)); |
ac9ec31b | 21859 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21860 | } |
21861 | ||
21862 | /* If not cached we need to read it in. */ | |
21863 | ||
21864 | if (this_type == NULL) | |
21865 | { | |
ac9ec31b | 21866 | struct die_info *type_die = NULL; |
673bfd45 DE |
21867 | struct dwarf2_cu *type_cu = cu; |
21868 | ||
7771576e | 21869 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21870 | type_die = follow_die_ref (die, attr, &type_cu); |
21871 | if (type_die == NULL) | |
21872 | return build_error_marker_type (cu, die); | |
21873 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21874 | from an inter-CU reference and the type's CU got expanded before |
21875 | ours. */ | |
ac9ec31b | 21876 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21877 | } |
21878 | ||
21879 | /* If we still don't have a type use an error marker. */ | |
21880 | ||
21881 | if (this_type == NULL) | |
ac9ec31b | 21882 | return build_error_marker_type (cu, die); |
673bfd45 | 21883 | |
f792889a | 21884 | return this_type; |
c906108c SS |
21885 | } |
21886 | ||
673bfd45 DE |
21887 | /* Return the type in DIE, CU. |
21888 | Returns NULL for invalid types. | |
21889 | ||
02142a6c | 21890 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21891 | and only reads the die in if necessary. |
21892 | ||
21893 | NOTE: This can be called when reading in partial or full symbols. */ | |
21894 | ||
f792889a | 21895 | static struct type * |
e7c27a73 | 21896 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21897 | { |
f792889a DJ |
21898 | struct type *this_type; |
21899 | ||
21900 | this_type = get_die_type (die, cu); | |
21901 | if (this_type) | |
21902 | return this_type; | |
21903 | ||
673bfd45 DE |
21904 | return read_type_die_1 (die, cu); |
21905 | } | |
21906 | ||
21907 | /* Read the type in DIE, CU. | |
21908 | Returns NULL for invalid types. */ | |
21909 | ||
21910 | static struct type * | |
21911 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21912 | { | |
21913 | struct type *this_type = NULL; | |
21914 | ||
c906108c SS |
21915 | switch (die->tag) |
21916 | { | |
21917 | case DW_TAG_class_type: | |
680b30c7 | 21918 | case DW_TAG_interface_type: |
c906108c SS |
21919 | case DW_TAG_structure_type: |
21920 | case DW_TAG_union_type: | |
f792889a | 21921 | this_type = read_structure_type (die, cu); |
c906108c SS |
21922 | break; |
21923 | case DW_TAG_enumeration_type: | |
f792889a | 21924 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21925 | break; |
21926 | case DW_TAG_subprogram: | |
21927 | case DW_TAG_subroutine_type: | |
edb3359d | 21928 | case DW_TAG_inlined_subroutine: |
f792889a | 21929 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21930 | break; |
21931 | case DW_TAG_array_type: | |
f792889a | 21932 | this_type = read_array_type (die, cu); |
c906108c | 21933 | break; |
72019c9c | 21934 | case DW_TAG_set_type: |
f792889a | 21935 | this_type = read_set_type (die, cu); |
72019c9c | 21936 | break; |
c906108c | 21937 | case DW_TAG_pointer_type: |
f792889a | 21938 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21939 | break; |
21940 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21941 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21942 | break; |
21943 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21944 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21945 | break; | |
21946 | case DW_TAG_rvalue_reference_type: | |
21947 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21948 | break; |
21949 | case DW_TAG_const_type: | |
f792889a | 21950 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21951 | break; |
21952 | case DW_TAG_volatile_type: | |
f792889a | 21953 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21954 | break; |
06d66ee9 TT |
21955 | case DW_TAG_restrict_type: |
21956 | this_type = read_tag_restrict_type (die, cu); | |
21957 | break; | |
c906108c | 21958 | case DW_TAG_string_type: |
f792889a | 21959 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21960 | break; |
21961 | case DW_TAG_typedef: | |
f792889a | 21962 | this_type = read_typedef (die, cu); |
c906108c | 21963 | break; |
a02abb62 | 21964 | case DW_TAG_subrange_type: |
f792889a | 21965 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21966 | break; |
c906108c | 21967 | case DW_TAG_base_type: |
f792889a | 21968 | this_type = read_base_type (die, cu); |
c906108c | 21969 | break; |
81a17f79 | 21970 | case DW_TAG_unspecified_type: |
f792889a | 21971 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21972 | break; |
0114d602 DJ |
21973 | case DW_TAG_namespace: |
21974 | this_type = read_namespace_type (die, cu); | |
21975 | break; | |
f55ee35c JK |
21976 | case DW_TAG_module: |
21977 | this_type = read_module_type (die, cu); | |
21978 | break; | |
a2c2acaf MW |
21979 | case DW_TAG_atomic_type: |
21980 | this_type = read_tag_atomic_type (die, cu); | |
21981 | break; | |
c906108c | 21982 | default: |
b98664d3 | 21983 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 21984 | dwarf_tag_name (die->tag)); |
c906108c SS |
21985 | break; |
21986 | } | |
63d06c5c | 21987 | |
f792889a | 21988 | return this_type; |
63d06c5c DC |
21989 | } |
21990 | ||
abc72ce4 DE |
21991 | /* See if we can figure out if the class lives in a namespace. We do |
21992 | this by looking for a member function; its demangled name will | |
21993 | contain namespace info, if there is any. | |
21994 | Return the computed name or NULL. | |
21995 | Space for the result is allocated on the objfile's obstack. | |
21996 | This is the full-die version of guess_partial_die_structure_name. | |
21997 | In this case we know DIE has no useful parent. */ | |
21998 | ||
21999 | static char * | |
22000 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
22001 | { | |
22002 | struct die_info *spec_die; | |
22003 | struct dwarf2_cu *spec_cu; | |
22004 | struct die_info *child; | |
518817b3 | 22005 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
22006 | |
22007 | spec_cu = cu; | |
22008 | spec_die = die_specification (die, &spec_cu); | |
22009 | if (spec_die != NULL) | |
22010 | { | |
22011 | die = spec_die; | |
22012 | cu = spec_cu; | |
22013 | } | |
22014 | ||
22015 | for (child = die->child; | |
22016 | child != NULL; | |
22017 | child = child->sibling) | |
22018 | { | |
22019 | if (child->tag == DW_TAG_subprogram) | |
22020 | { | |
73b9be8b | 22021 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22022 | |
7d45c7c3 | 22023 | if (linkage_name != NULL) |
abc72ce4 DE |
22024 | { |
22025 | char *actual_name | |
22026 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 22027 | linkage_name); |
abc72ce4 DE |
22028 | char *name = NULL; |
22029 | ||
22030 | if (actual_name != NULL) | |
22031 | { | |
15d034d0 | 22032 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22033 | |
22034 | if (die_name != NULL | |
22035 | && strcmp (die_name, actual_name) != 0) | |
22036 | { | |
22037 | /* Strip off the class name from the full name. | |
22038 | We want the prefix. */ | |
22039 | int die_name_len = strlen (die_name); | |
22040 | int actual_name_len = strlen (actual_name); | |
22041 | ||
22042 | /* Test for '::' as a sanity check. */ | |
22043 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
22044 | && actual_name[actual_name_len |
22045 | - die_name_len - 1] == ':') | |
224c3ddb | 22046 | name = (char *) obstack_copy0 ( |
e3b94546 | 22047 | &objfile->per_bfd->storage_obstack, |
224c3ddb | 22048 | actual_name, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22049 | } |
22050 | } | |
22051 | xfree (actual_name); | |
22052 | return name; | |
22053 | } | |
22054 | } | |
22055 | } | |
22056 | ||
22057 | return NULL; | |
22058 | } | |
22059 | ||
96408a79 SA |
22060 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22061 | prefix part in such case. See | |
22062 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22063 | ||
a121b7c1 | 22064 | static const char * |
96408a79 SA |
22065 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22066 | { | |
22067 | struct attribute *attr; | |
e6a959d6 | 22068 | const char *base; |
96408a79 SA |
22069 | |
22070 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22071 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22072 | return NULL; | |
22073 | ||
7d45c7c3 | 22074 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22075 | return NULL; |
22076 | ||
73b9be8b | 22077 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
22078 | if (attr == NULL || DW_STRING (attr) == NULL) |
22079 | return NULL; | |
22080 | ||
22081 | /* dwarf2_name had to be already called. */ | |
22082 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
22083 | ||
22084 | /* Strip the base name, keep any leading namespaces/classes. */ | |
22085 | base = strrchr (DW_STRING (attr), ':'); | |
22086 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
22087 | return ""; | |
22088 | ||
518817b3 | 22089 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e3b94546 | 22090 | return (char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
224c3ddb SM |
22091 | DW_STRING (attr), |
22092 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
22093 | } |
22094 | ||
fdde2d81 | 22095 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22096 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22097 | |
0114d602 DJ |
22098 | For example, if we're within the method foo() in the following |
22099 | code: | |
22100 | ||
22101 | namespace N { | |
22102 | class C { | |
22103 | void foo () { | |
22104 | } | |
22105 | }; | |
22106 | } | |
22107 | ||
22108 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22109 | |
0d5cff50 | 22110 | static const char * |
e142c38c | 22111 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22112 | { |
518817b3 SM |
22113 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22114 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
22115 | struct die_info *parent, *spec_die; |
22116 | struct dwarf2_cu *spec_cu; | |
22117 | struct type *parent_type; | |
a121b7c1 | 22118 | const char *retval; |
63d06c5c | 22119 | |
9c37b5ae | 22120 | if (cu->language != language_cplus |
c44af4eb TT |
22121 | && cu->language != language_fortran && cu->language != language_d |
22122 | && cu->language != language_rust) | |
0114d602 DJ |
22123 | return ""; |
22124 | ||
96408a79 SA |
22125 | retval = anonymous_struct_prefix (die, cu); |
22126 | if (retval) | |
22127 | return retval; | |
22128 | ||
0114d602 DJ |
22129 | /* We have to be careful in the presence of DW_AT_specification. |
22130 | For example, with GCC 3.4, given the code | |
22131 | ||
22132 | namespace N { | |
22133 | void foo() { | |
22134 | // Definition of N::foo. | |
22135 | } | |
22136 | } | |
22137 | ||
22138 | then we'll have a tree of DIEs like this: | |
22139 | ||
22140 | 1: DW_TAG_compile_unit | |
22141 | 2: DW_TAG_namespace // N | |
22142 | 3: DW_TAG_subprogram // declaration of N::foo | |
22143 | 4: DW_TAG_subprogram // definition of N::foo | |
22144 | DW_AT_specification // refers to die #3 | |
22145 | ||
22146 | Thus, when processing die #4, we have to pretend that we're in | |
22147 | the context of its DW_AT_specification, namely the contex of die | |
22148 | #3. */ | |
22149 | spec_cu = cu; | |
22150 | spec_die = die_specification (die, &spec_cu); | |
22151 | if (spec_die == NULL) | |
22152 | parent = die->parent; | |
22153 | else | |
63d06c5c | 22154 | { |
0114d602 DJ |
22155 | parent = spec_die->parent; |
22156 | cu = spec_cu; | |
63d06c5c | 22157 | } |
0114d602 DJ |
22158 | |
22159 | if (parent == NULL) | |
22160 | return ""; | |
98bfdba5 PA |
22161 | else if (parent->building_fullname) |
22162 | { | |
22163 | const char *name; | |
22164 | const char *parent_name; | |
22165 | ||
22166 | /* It has been seen on RealView 2.2 built binaries, | |
22167 | DW_TAG_template_type_param types actually _defined_ as | |
22168 | children of the parent class: | |
22169 | ||
22170 | enum E {}; | |
22171 | template class <class Enum> Class{}; | |
22172 | Class<enum E> class_e; | |
22173 | ||
22174 | 1: DW_TAG_class_type (Class) | |
22175 | 2: DW_TAG_enumeration_type (E) | |
22176 | 3: DW_TAG_enumerator (enum1:0) | |
22177 | 3: DW_TAG_enumerator (enum2:1) | |
22178 | ... | |
22179 | 2: DW_TAG_template_type_param | |
22180 | DW_AT_type DW_FORM_ref_udata (E) | |
22181 | ||
22182 | Besides being broken debug info, it can put GDB into an | |
22183 | infinite loop. Consider: | |
22184 | ||
22185 | When we're building the full name for Class<E>, we'll start | |
22186 | at Class, and go look over its template type parameters, | |
22187 | finding E. We'll then try to build the full name of E, and | |
22188 | reach here. We're now trying to build the full name of E, | |
22189 | and look over the parent DIE for containing scope. In the | |
22190 | broken case, if we followed the parent DIE of E, we'd again | |
22191 | find Class, and once again go look at its template type | |
22192 | arguments, etc., etc. Simply don't consider such parent die | |
22193 | as source-level parent of this die (it can't be, the language | |
22194 | doesn't allow it), and break the loop here. */ | |
22195 | name = dwarf2_name (die, cu); | |
22196 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22197 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22198 | name ? name : "<unknown>", |
22199 | parent_name ? parent_name : "<unknown>"); | |
22200 | return ""; | |
22201 | } | |
63d06c5c | 22202 | else |
0114d602 DJ |
22203 | switch (parent->tag) |
22204 | { | |
63d06c5c | 22205 | case DW_TAG_namespace: |
0114d602 | 22206 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22207 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22208 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22209 | Work around this problem here. */ | |
22210 | if (cu->language == language_cplus | |
e86ca25f | 22211 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 22212 | return ""; |
0114d602 | 22213 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 22214 | return TYPE_NAME (parent_type); |
63d06c5c | 22215 | case DW_TAG_class_type: |
680b30c7 | 22216 | case DW_TAG_interface_type: |
63d06c5c | 22217 | case DW_TAG_structure_type: |
0114d602 | 22218 | case DW_TAG_union_type: |
f55ee35c | 22219 | case DW_TAG_module: |
0114d602 | 22220 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
22221 | if (TYPE_NAME (parent_type) != NULL) |
22222 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
22223 | else |
22224 | /* An anonymous structure is only allowed non-static data | |
22225 | members; no typedefs, no member functions, et cetera. | |
22226 | So it does not need a prefix. */ | |
22227 | return ""; | |
abc72ce4 | 22228 | case DW_TAG_compile_unit: |
95554aad | 22229 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22230 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22231 | if (cu->language == language_cplus | |
8b70b953 | 22232 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
22233 | && die->child != NULL |
22234 | && (die->tag == DW_TAG_class_type | |
22235 | || die->tag == DW_TAG_structure_type | |
22236 | || die->tag == DW_TAG_union_type)) | |
22237 | { | |
22238 | char *name = guess_full_die_structure_name (die, cu); | |
22239 | if (name != NULL) | |
22240 | return name; | |
22241 | } | |
22242 | return ""; | |
3d567982 TT |
22243 | case DW_TAG_enumeration_type: |
22244 | parent_type = read_type_die (parent, cu); | |
22245 | if (TYPE_DECLARED_CLASS (parent_type)) | |
22246 | { | |
e86ca25f TT |
22247 | if (TYPE_NAME (parent_type) != NULL) |
22248 | return TYPE_NAME (parent_type); | |
3d567982 TT |
22249 | return ""; |
22250 | } | |
22251 | /* Fall through. */ | |
63d06c5c | 22252 | default: |
8176b9b8 | 22253 | return determine_prefix (parent, cu); |
63d06c5c | 22254 | } |
63d06c5c DC |
22255 | } |
22256 | ||
3e43a32a MS |
22257 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22258 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22259 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22260 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22261 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22262 | |
f55ee35c | 22263 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22264 | |
22265 | static char * | |
f55ee35c JK |
22266 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
22267 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 22268 | { |
f55ee35c | 22269 | const char *lead = ""; |
5c315b68 | 22270 | const char *sep; |
63d06c5c | 22271 | |
3e43a32a MS |
22272 | if (suffix == NULL || suffix[0] == '\0' |
22273 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22274 | sep = ""; |
45280282 IB |
22275 | else if (cu->language == language_d) |
22276 | { | |
22277 | /* For D, the 'main' function could be defined in any module, but it | |
22278 | should never be prefixed. */ | |
22279 | if (strcmp (suffix, "D main") == 0) | |
22280 | { | |
22281 | prefix = ""; | |
22282 | sep = ""; | |
22283 | } | |
22284 | else | |
22285 | sep = "."; | |
22286 | } | |
f55ee35c JK |
22287 | else if (cu->language == language_fortran && physname) |
22288 | { | |
22289 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22290 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22291 | ||
22292 | lead = "__"; | |
22293 | sep = "_MOD_"; | |
22294 | } | |
987504bb JJ |
22295 | else |
22296 | sep = "::"; | |
63d06c5c | 22297 | |
6dd47d34 DE |
22298 | if (prefix == NULL) |
22299 | prefix = ""; | |
22300 | if (suffix == NULL) | |
22301 | suffix = ""; | |
22302 | ||
987504bb JJ |
22303 | if (obs == NULL) |
22304 | { | |
3e43a32a | 22305 | char *retval |
224c3ddb SM |
22306 | = ((char *) |
22307 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22308 | |
f55ee35c JK |
22309 | strcpy (retval, lead); |
22310 | strcat (retval, prefix); | |
6dd47d34 DE |
22311 | strcat (retval, sep); |
22312 | strcat (retval, suffix); | |
63d06c5c DC |
22313 | return retval; |
22314 | } | |
987504bb JJ |
22315 | else |
22316 | { | |
22317 | /* We have an obstack. */ | |
f55ee35c | 22318 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22319 | } |
63d06c5c DC |
22320 | } |
22321 | ||
c906108c SS |
22322 | /* Return sibling of die, NULL if no sibling. */ |
22323 | ||
f9aca02d | 22324 | static struct die_info * |
fba45db2 | 22325 | sibling_die (struct die_info *die) |
c906108c | 22326 | { |
639d11d3 | 22327 | return die->sibling; |
c906108c SS |
22328 | } |
22329 | ||
71c25dea TT |
22330 | /* Get name of a die, return NULL if not found. */ |
22331 | ||
15d034d0 TT |
22332 | static const char * |
22333 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
22334 | struct obstack *obstack) |
22335 | { | |
22336 | if (name && cu->language == language_cplus) | |
22337 | { | |
2f408ecb | 22338 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 22339 | |
2f408ecb | 22340 | if (!canon_name.empty ()) |
71c25dea | 22341 | { |
2f408ecb PA |
22342 | if (canon_name != name) |
22343 | name = (const char *) obstack_copy0 (obstack, | |
22344 | canon_name.c_str (), | |
22345 | canon_name.length ()); | |
71c25dea TT |
22346 | } |
22347 | } | |
22348 | ||
22349 | return name; | |
c906108c SS |
22350 | } |
22351 | ||
96553a0c DE |
22352 | /* Get name of a die, return NULL if not found. |
22353 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22354 | |
15d034d0 | 22355 | static const char * |
e142c38c | 22356 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22357 | { |
22358 | struct attribute *attr; | |
518817b3 | 22359 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 22360 | |
e142c38c | 22361 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 22362 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 22363 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22364 | && die->tag != DW_TAG_class_type |
22365 | && die->tag != DW_TAG_interface_type | |
22366 | && die->tag != DW_TAG_structure_type | |
22367 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22368 | return NULL; |
22369 | ||
22370 | switch (die->tag) | |
22371 | { | |
22372 | case DW_TAG_compile_unit: | |
95554aad | 22373 | case DW_TAG_partial_unit: |
71c25dea TT |
22374 | /* Compilation units have a DW_AT_name that is a filename, not |
22375 | a source language identifier. */ | |
22376 | case DW_TAG_enumeration_type: | |
22377 | case DW_TAG_enumerator: | |
22378 | /* These tags always have simple identifiers already; no need | |
22379 | to canonicalize them. */ | |
22380 | return DW_STRING (attr); | |
907af001 | 22381 | |
96553a0c DE |
22382 | case DW_TAG_namespace: |
22383 | if (attr != NULL && DW_STRING (attr) != NULL) | |
22384 | return DW_STRING (attr); | |
22385 | return CP_ANONYMOUS_NAMESPACE_STR; | |
22386 | ||
907af001 UW |
22387 | case DW_TAG_class_type: |
22388 | case DW_TAG_interface_type: | |
22389 | case DW_TAG_structure_type: | |
22390 | case DW_TAG_union_type: | |
22391 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22392 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22393 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22394 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 22395 | if (attr && DW_STRING (attr) |
61012eef GB |
22396 | && (startswith (DW_STRING (attr), "._") |
22397 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 22398 | return NULL; |
53832f31 TT |
22399 | |
22400 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22401 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22402 | if (!attr || DW_STRING (attr) == NULL) | |
22403 | { | |
df5c6c50 | 22404 | char *demangled = NULL; |
53832f31 | 22405 | |
73b9be8b | 22406 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
22407 | if (attr == NULL || DW_STRING (attr) == NULL) |
22408 | return NULL; | |
22409 | ||
df5c6c50 JK |
22410 | /* Avoid demangling DW_STRING (attr) the second time on a second |
22411 | call for the same DIE. */ | |
22412 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 22413 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
22414 | |
22415 | if (demangled) | |
22416 | { | |
e6a959d6 | 22417 | const char *base; |
96408a79 | 22418 | |
53832f31 | 22419 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 22420 | DW_STRING (attr) |
224c3ddb | 22421 | = ((const char *) |
e3b94546 | 22422 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
224c3ddb | 22423 | demangled, strlen (demangled))); |
53832f31 TT |
22424 | DW_STRING_IS_CANONICAL (attr) = 1; |
22425 | xfree (demangled); | |
96408a79 SA |
22426 | |
22427 | /* Strip any leading namespaces/classes, keep only the base name. | |
22428 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
22429 | base = strrchr (DW_STRING (attr), ':'); | |
22430 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
22431 | return &base[1]; | |
22432 | else | |
22433 | return DW_STRING (attr); | |
53832f31 TT |
22434 | } |
22435 | } | |
907af001 UW |
22436 | break; |
22437 | ||
71c25dea | 22438 | default: |
907af001 UW |
22439 | break; |
22440 | } | |
22441 | ||
22442 | if (!DW_STRING_IS_CANONICAL (attr)) | |
22443 | { | |
22444 | DW_STRING (attr) | |
22445 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
e3b94546 | 22446 | &objfile->per_bfd->storage_obstack); |
907af001 | 22447 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 22448 | } |
907af001 | 22449 | return DW_STRING (attr); |
9219021c DC |
22450 | } |
22451 | ||
22452 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22453 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22454 | containing the return value on output. */ | |
9219021c DC |
22455 | |
22456 | static struct die_info * | |
f2f0e013 | 22457 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22458 | { |
22459 | struct attribute *attr; | |
9219021c | 22460 | |
f2f0e013 | 22461 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22462 | if (attr == NULL) |
22463 | return NULL; | |
22464 | ||
f2f0e013 | 22465 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22466 | } |
22467 | ||
c906108c SS |
22468 | /* Convert a DIE tag into its string name. */ |
22469 | ||
f39c6ffd | 22470 | static const char * |
aa1ee363 | 22471 | dwarf_tag_name (unsigned tag) |
c906108c | 22472 | { |
f39c6ffd TT |
22473 | const char *name = get_DW_TAG_name (tag); |
22474 | ||
22475 | if (name == NULL) | |
22476 | return "DW_TAG_<unknown>"; | |
22477 | ||
22478 | return name; | |
c906108c SS |
22479 | } |
22480 | ||
22481 | /* Convert a DWARF attribute code into its string name. */ | |
22482 | ||
f39c6ffd | 22483 | static const char * |
aa1ee363 | 22484 | dwarf_attr_name (unsigned attr) |
c906108c | 22485 | { |
f39c6ffd TT |
22486 | const char *name; |
22487 | ||
c764a876 | 22488 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
22489 | if (attr == DW_AT_MIPS_fde) |
22490 | return "DW_AT_MIPS_fde"; | |
22491 | #else | |
22492 | if (attr == DW_AT_HP_block_index) | |
22493 | return "DW_AT_HP_block_index"; | |
c764a876 | 22494 | #endif |
f39c6ffd TT |
22495 | |
22496 | name = get_DW_AT_name (attr); | |
22497 | ||
22498 | if (name == NULL) | |
22499 | return "DW_AT_<unknown>"; | |
22500 | ||
22501 | return name; | |
c906108c SS |
22502 | } |
22503 | ||
22504 | /* Convert a DWARF value form code into its string name. */ | |
22505 | ||
f39c6ffd | 22506 | static const char * |
aa1ee363 | 22507 | dwarf_form_name (unsigned form) |
c906108c | 22508 | { |
f39c6ffd TT |
22509 | const char *name = get_DW_FORM_name (form); |
22510 | ||
22511 | if (name == NULL) | |
22512 | return "DW_FORM_<unknown>"; | |
22513 | ||
22514 | return name; | |
c906108c SS |
22515 | } |
22516 | ||
a121b7c1 | 22517 | static const char * |
fba45db2 | 22518 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
22519 | { |
22520 | if (mybool) | |
22521 | return "TRUE"; | |
22522 | else | |
22523 | return "FALSE"; | |
22524 | } | |
22525 | ||
22526 | /* Convert a DWARF type code into its string name. */ | |
22527 | ||
f39c6ffd | 22528 | static const char * |
aa1ee363 | 22529 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 22530 | { |
f39c6ffd | 22531 | const char *name = get_DW_ATE_name (enc); |
c906108c | 22532 | |
f39c6ffd TT |
22533 | if (name == NULL) |
22534 | return "DW_ATE_<unknown>"; | |
c906108c | 22535 | |
f39c6ffd | 22536 | return name; |
c906108c | 22537 | } |
c906108c | 22538 | |
f9aca02d | 22539 | static void |
d97bc12b | 22540 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
22541 | { |
22542 | unsigned int i; | |
22543 | ||
d97bc12b | 22544 | print_spaces (indent, f); |
9d8780f0 | 22545 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 22546 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 22547 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
22548 | |
22549 | if (die->parent != NULL) | |
22550 | { | |
22551 | print_spaces (indent, f); | |
9d8780f0 SM |
22552 | fprintf_unfiltered (f, " parent at offset: %s\n", |
22553 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
22554 | } |
22555 | ||
22556 | print_spaces (indent, f); | |
22557 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 22558 | dwarf_bool_name (die->child != NULL)); |
c906108c | 22559 | |
d97bc12b DE |
22560 | print_spaces (indent, f); |
22561 | fprintf_unfiltered (f, " attributes:\n"); | |
22562 | ||
c906108c SS |
22563 | for (i = 0; i < die->num_attrs; ++i) |
22564 | { | |
d97bc12b DE |
22565 | print_spaces (indent, f); |
22566 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
22567 | dwarf_attr_name (die->attrs[i].name), |
22568 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 22569 | |
c906108c SS |
22570 | switch (die->attrs[i].form) |
22571 | { | |
c906108c | 22572 | case DW_FORM_addr: |
3019eac3 | 22573 | case DW_FORM_GNU_addr_index: |
d97bc12b | 22574 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 22575 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
22576 | break; |
22577 | case DW_FORM_block2: | |
22578 | case DW_FORM_block4: | |
22579 | case DW_FORM_block: | |
22580 | case DW_FORM_block1: | |
56eb65bd SP |
22581 | fprintf_unfiltered (f, "block: size %s", |
22582 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 22583 | break; |
2dc7f7b3 | 22584 | case DW_FORM_exprloc: |
56eb65bd SP |
22585 | fprintf_unfiltered (f, "expression: size %s", |
22586 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 22587 | break; |
0224619f JK |
22588 | case DW_FORM_data16: |
22589 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
22590 | break; | |
4568ecf9 DE |
22591 | case DW_FORM_ref_addr: |
22592 | fprintf_unfiltered (f, "ref address: "); | |
22593 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22594 | break; | |
36586728 TT |
22595 | case DW_FORM_GNU_ref_alt: |
22596 | fprintf_unfiltered (f, "alt ref address: "); | |
22597 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22598 | break; | |
10b3939b DJ |
22599 | case DW_FORM_ref1: |
22600 | case DW_FORM_ref2: | |
22601 | case DW_FORM_ref4: | |
4568ecf9 DE |
22602 | case DW_FORM_ref8: |
22603 | case DW_FORM_ref_udata: | |
d97bc12b | 22604 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 22605 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 22606 | break; |
c906108c SS |
22607 | case DW_FORM_data1: |
22608 | case DW_FORM_data2: | |
22609 | case DW_FORM_data4: | |
ce5d95e1 | 22610 | case DW_FORM_data8: |
c906108c SS |
22611 | case DW_FORM_udata: |
22612 | case DW_FORM_sdata: | |
43bbcdc2 PH |
22613 | fprintf_unfiltered (f, "constant: %s", |
22614 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 22615 | break; |
2dc7f7b3 TT |
22616 | case DW_FORM_sec_offset: |
22617 | fprintf_unfiltered (f, "section offset: %s", | |
22618 | pulongest (DW_UNSND (&die->attrs[i]))); | |
22619 | break; | |
55f1336d | 22620 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
22621 | fprintf_unfiltered (f, "signature: %s", |
22622 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 22623 | break; |
c906108c | 22624 | case DW_FORM_string: |
4bdf3d34 | 22625 | case DW_FORM_strp: |
43988095 | 22626 | case DW_FORM_line_strp: |
3019eac3 | 22627 | case DW_FORM_GNU_str_index: |
36586728 | 22628 | case DW_FORM_GNU_strp_alt: |
8285870a | 22629 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 22630 | DW_STRING (&die->attrs[i]) |
8285870a JK |
22631 | ? DW_STRING (&die->attrs[i]) : "", |
22632 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
22633 | break; |
22634 | case DW_FORM_flag: | |
22635 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 22636 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22637 | else |
d97bc12b | 22638 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22639 | break; |
2dc7f7b3 TT |
22640 | case DW_FORM_flag_present: |
22641 | fprintf_unfiltered (f, "flag: TRUE"); | |
22642 | break; | |
a8329558 | 22643 | case DW_FORM_indirect: |
0963b4bd MS |
22644 | /* The reader will have reduced the indirect form to |
22645 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
22646 | fprintf_unfiltered (f, |
22647 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 22648 | break; |
663c44ac JK |
22649 | case DW_FORM_implicit_const: |
22650 | fprintf_unfiltered (f, "constant: %s", | |
22651 | plongest (DW_SND (&die->attrs[i]))); | |
22652 | break; | |
c906108c | 22653 | default: |
d97bc12b | 22654 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22655 | die->attrs[i].form); |
d97bc12b | 22656 | break; |
c906108c | 22657 | } |
d97bc12b | 22658 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22659 | } |
22660 | } | |
22661 | ||
f9aca02d | 22662 | static void |
d97bc12b | 22663 | dump_die_for_error (struct die_info *die) |
c906108c | 22664 | { |
d97bc12b DE |
22665 | dump_die_shallow (gdb_stderr, 0, die); |
22666 | } | |
22667 | ||
22668 | static void | |
22669 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22670 | { | |
22671 | int indent = level * 4; | |
22672 | ||
22673 | gdb_assert (die != NULL); | |
22674 | ||
22675 | if (level >= max_level) | |
22676 | return; | |
22677 | ||
22678 | dump_die_shallow (f, indent, die); | |
22679 | ||
22680 | if (die->child != NULL) | |
c906108c | 22681 | { |
d97bc12b DE |
22682 | print_spaces (indent, f); |
22683 | fprintf_unfiltered (f, " Children:"); | |
22684 | if (level + 1 < max_level) | |
22685 | { | |
22686 | fprintf_unfiltered (f, "\n"); | |
22687 | dump_die_1 (f, level + 1, max_level, die->child); | |
22688 | } | |
22689 | else | |
22690 | { | |
3e43a32a MS |
22691 | fprintf_unfiltered (f, |
22692 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22693 | } |
22694 | } | |
22695 | ||
22696 | if (die->sibling != NULL && level > 0) | |
22697 | { | |
22698 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22699 | } |
22700 | } | |
22701 | ||
d97bc12b DE |
22702 | /* This is called from the pdie macro in gdbinit.in. |
22703 | It's not static so gcc will keep a copy callable from gdb. */ | |
22704 | ||
22705 | void | |
22706 | dump_die (struct die_info *die, int max_level) | |
22707 | { | |
22708 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22709 | } | |
22710 | ||
f9aca02d | 22711 | static void |
51545339 | 22712 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22713 | { |
51545339 | 22714 | void **slot; |
c906108c | 22715 | |
9c541725 PA |
22716 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22717 | to_underlying (die->sect_off), | |
b64f50a1 | 22718 | INSERT); |
51545339 DJ |
22719 | |
22720 | *slot = die; | |
c906108c SS |
22721 | } |
22722 | ||
b64f50a1 JK |
22723 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
22724 | required kind. */ | |
22725 | ||
22726 | static sect_offset | |
ff39bb5e | 22727 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 22728 | { |
7771576e | 22729 | if (attr_form_is_ref (attr)) |
9c541725 | 22730 | return (sect_offset) DW_UNSND (attr); |
93311388 | 22731 | |
b98664d3 | 22732 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 22733 | dwarf_form_name (attr->form)); |
9c541725 | 22734 | return {}; |
c906108c SS |
22735 | } |
22736 | ||
43bbcdc2 PH |
22737 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
22738 | * the value held by the attribute is not constant. */ | |
a02abb62 | 22739 | |
43bbcdc2 | 22740 | static LONGEST |
ff39bb5e | 22741 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 22742 | { |
663c44ac | 22743 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
22744 | return DW_SND (attr); |
22745 | else if (attr->form == DW_FORM_udata | |
22746 | || attr->form == DW_FORM_data1 | |
22747 | || attr->form == DW_FORM_data2 | |
22748 | || attr->form == DW_FORM_data4 | |
22749 | || attr->form == DW_FORM_data8) | |
22750 | return DW_UNSND (attr); | |
22751 | else | |
22752 | { | |
0224619f | 22753 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
b98664d3 | 22754 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
22755 | dwarf_form_name (attr->form)); |
22756 | return default_value; | |
22757 | } | |
22758 | } | |
22759 | ||
348e048f DE |
22760 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22761 | On entry *REF_CU is the CU of SRC_DIE. | |
22762 | On exit *REF_CU is the CU of the result. */ | |
22763 | ||
22764 | static struct die_info * | |
ff39bb5e | 22765 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22766 | struct dwarf2_cu **ref_cu) |
22767 | { | |
22768 | struct die_info *die; | |
22769 | ||
7771576e | 22770 | if (attr_form_is_ref (attr)) |
348e048f | 22771 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22772 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22773 | die = follow_die_sig (src_die, attr, ref_cu); |
22774 | else | |
22775 | { | |
22776 | dump_die_for_error (src_die); | |
22777 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 22778 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
22779 | } |
22780 | ||
22781 | return die; | |
03dd20cc DJ |
22782 | } |
22783 | ||
5c631832 | 22784 | /* Follow reference OFFSET. |
673bfd45 DE |
22785 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22786 | On exit *REF_CU is the CU of the result. | |
22787 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22788 | |
f9aca02d | 22789 | static struct die_info * |
9c541725 | 22790 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22791 | struct dwarf2_cu **ref_cu) |
c906108c | 22792 | { |
10b3939b | 22793 | struct die_info temp_die; |
f2f0e013 | 22794 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
22795 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22796 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 22797 | |
348e048f DE |
22798 | gdb_assert (cu->per_cu != NULL); |
22799 | ||
98bfdba5 PA |
22800 | target_cu = cu; |
22801 | ||
3019eac3 | 22802 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22803 | { |
22804 | /* .debug_types CUs cannot reference anything outside their CU. | |
22805 | If they need to, they have to reference a signatured type via | |
55f1336d | 22806 | DW_FORM_ref_sig8. */ |
9c541725 | 22807 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 22808 | return NULL; |
348e048f | 22809 | } |
36586728 | 22810 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 22811 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
22812 | { |
22813 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22814 | |
9c541725 | 22815 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 22816 | dwarf2_per_objfile); |
03dd20cc DJ |
22817 | |
22818 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 22819 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 22820 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 22821 | |
10b3939b DJ |
22822 | target_cu = per_cu->cu; |
22823 | } | |
98bfdba5 PA |
22824 | else if (cu->dies == NULL) |
22825 | { | |
22826 | /* We're loading full DIEs during partial symbol reading. */ | |
22827 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 22828 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 22829 | } |
c906108c | 22830 | |
f2f0e013 | 22831 | *ref_cu = target_cu; |
9c541725 | 22832 | temp_die.sect_off = sect_off; |
9a3c8263 | 22833 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22834 | &temp_die, |
22835 | to_underlying (sect_off)); | |
5c631832 | 22836 | } |
10b3939b | 22837 | |
5c631832 JK |
22838 | /* Follow reference attribute ATTR of SRC_DIE. |
22839 | On entry *REF_CU is the CU of SRC_DIE. | |
22840 | On exit *REF_CU is the CU of the result. */ | |
22841 | ||
22842 | static struct die_info * | |
ff39bb5e | 22843 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22844 | struct dwarf2_cu **ref_cu) |
22845 | { | |
9c541725 | 22846 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
22847 | struct dwarf2_cu *cu = *ref_cu; |
22848 | struct die_info *die; | |
22849 | ||
9c541725 | 22850 | die = follow_die_offset (sect_off, |
36586728 TT |
22851 | (attr->form == DW_FORM_GNU_ref_alt |
22852 | || cu->per_cu->is_dwz), | |
22853 | ref_cu); | |
5c631832 | 22854 | if (!die) |
9d8780f0 SM |
22855 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
22856 | "at %s [in module %s]"), | |
22857 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 22858 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 22859 | |
5c631832 JK |
22860 | return die; |
22861 | } | |
22862 | ||
9c541725 | 22863 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b | 22864 | Returned value is intended for DW_OP_call*. Returned |
e3b94546 SM |
22865 | dwarf2_locexpr_baton->data has lifetime of |
22866 | PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */ | |
5c631832 JK |
22867 | |
22868 | struct dwarf2_locexpr_baton | |
9c541725 | 22869 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
22870 | struct dwarf2_per_cu_data *per_cu, |
22871 | CORE_ADDR (*get_frame_pc) (void *baton), | |
22872 | void *baton) | |
5c631832 | 22873 | { |
918dd910 | 22874 | struct dwarf2_cu *cu; |
5c631832 JK |
22875 | struct die_info *die; |
22876 | struct attribute *attr; | |
22877 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
22878 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
22879 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 22880 | |
918dd910 | 22881 | if (per_cu->cu == NULL) |
58f0c718 | 22882 | load_cu (per_cu, false); |
918dd910 | 22883 | cu = per_cu->cu; |
cc12ce38 DE |
22884 | if (cu == NULL) |
22885 | { | |
22886 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22887 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22888 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22889 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22890 | } |
918dd910 | 22891 | |
9c541725 | 22892 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 22893 | if (!die) |
9d8780f0 SM |
22894 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22895 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
22896 | |
22897 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22898 | if (!attr) | |
22899 | { | |
e103e986 JK |
22900 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22901 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22902 | |
e103e986 | 22903 | retval.data = NULL; |
5c631832 JK |
22904 | retval.size = 0; |
22905 | } | |
8cf6f0b1 TT |
22906 | else if (attr_form_is_section_offset (attr)) |
22907 | { | |
22908 | struct dwarf2_loclist_baton loclist_baton; | |
22909 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22910 | size_t size; | |
22911 | ||
22912 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22913 | ||
22914 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22915 | &size, pc); | |
22916 | retval.size = size; | |
22917 | } | |
5c631832 JK |
22918 | else |
22919 | { | |
22920 | if (!attr_form_is_block (attr)) | |
9d8780f0 | 22921 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 22922 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 22923 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
22924 | |
22925 | retval.data = DW_BLOCK (attr)->data; | |
22926 | retval.size = DW_BLOCK (attr)->size; | |
22927 | } | |
22928 | retval.per_cu = cu->per_cu; | |
918dd910 | 22929 | |
ed2dc618 | 22930 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 22931 | |
5c631832 | 22932 | return retval; |
348e048f DE |
22933 | } |
22934 | ||
8b9737bf TT |
22935 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
22936 | offset. */ | |
22937 | ||
22938 | struct dwarf2_locexpr_baton | |
22939 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
22940 | struct dwarf2_per_cu_data *per_cu, | |
22941 | CORE_ADDR (*get_frame_pc) (void *baton), | |
22942 | void *baton) | |
22943 | { | |
9c541725 | 22944 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22945 | |
9c541725 | 22946 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22947 | } |
22948 | ||
b6807d98 TT |
22949 | /* Write a constant of a given type as target-ordered bytes into |
22950 | OBSTACK. */ | |
22951 | ||
22952 | static const gdb_byte * | |
22953 | write_constant_as_bytes (struct obstack *obstack, | |
22954 | enum bfd_endian byte_order, | |
22955 | struct type *type, | |
22956 | ULONGEST value, | |
22957 | LONGEST *len) | |
22958 | { | |
22959 | gdb_byte *result; | |
22960 | ||
22961 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22962 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22963 | store_unsigned_integer (result, *len, byte_order, value); |
22964 | ||
22965 | return result; | |
22966 | } | |
22967 | ||
22968 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
22969 | pointer to the constant bytes and set LEN to the length of the | |
22970 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
22971 | does not have a DW_AT_const_value, return NULL. */ | |
22972 | ||
22973 | const gdb_byte * | |
9c541725 | 22974 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
22975 | struct dwarf2_per_cu_data *per_cu, |
22976 | struct obstack *obstack, | |
22977 | LONGEST *len) | |
22978 | { | |
22979 | struct dwarf2_cu *cu; | |
22980 | struct die_info *die; | |
22981 | struct attribute *attr; | |
22982 | const gdb_byte *result = NULL; | |
22983 | struct type *type; | |
22984 | LONGEST value; | |
22985 | enum bfd_endian byte_order; | |
e3b94546 | 22986 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 22987 | |
b6807d98 | 22988 | if (per_cu->cu == NULL) |
58f0c718 | 22989 | load_cu (per_cu, false); |
b6807d98 | 22990 | cu = per_cu->cu; |
cc12ce38 DE |
22991 | if (cu == NULL) |
22992 | { | |
22993 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22994 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22995 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22996 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22997 | } |
b6807d98 | 22998 | |
9c541725 | 22999 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23000 | if (!die) |
9d8780f0 SM |
23001 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23002 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23003 | |
23004 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23005 | if (attr == NULL) | |
23006 | return NULL; | |
23007 | ||
e3b94546 | 23008 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23009 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23010 | ||
23011 | switch (attr->form) | |
23012 | { | |
23013 | case DW_FORM_addr: | |
23014 | case DW_FORM_GNU_addr_index: | |
23015 | { | |
23016 | gdb_byte *tem; | |
23017 | ||
23018 | *len = cu->header.addr_size; | |
224c3ddb | 23019 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23020 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
23021 | result = tem; | |
23022 | } | |
23023 | break; | |
23024 | case DW_FORM_string: | |
23025 | case DW_FORM_strp: | |
23026 | case DW_FORM_GNU_str_index: | |
23027 | case DW_FORM_GNU_strp_alt: | |
23028 | /* DW_STRING is already allocated on the objfile obstack, point | |
23029 | directly to it. */ | |
23030 | result = (const gdb_byte *) DW_STRING (attr); | |
23031 | *len = strlen (DW_STRING (attr)); | |
23032 | break; | |
23033 | case DW_FORM_block1: | |
23034 | case DW_FORM_block2: | |
23035 | case DW_FORM_block4: | |
23036 | case DW_FORM_block: | |
23037 | case DW_FORM_exprloc: | |
0224619f | 23038 | case DW_FORM_data16: |
b6807d98 TT |
23039 | result = DW_BLOCK (attr)->data; |
23040 | *len = DW_BLOCK (attr)->size; | |
23041 | break; | |
23042 | ||
23043 | /* The DW_AT_const_value attributes are supposed to carry the | |
23044 | symbol's value "represented as it would be on the target | |
23045 | architecture." By the time we get here, it's already been | |
23046 | converted to host endianness, so we just need to sign- or | |
23047 | zero-extend it as appropriate. */ | |
23048 | case DW_FORM_data1: | |
23049 | type = die_type (die, cu); | |
23050 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23051 | if (result == NULL) | |
23052 | result = write_constant_as_bytes (obstack, byte_order, | |
23053 | type, value, len); | |
23054 | break; | |
23055 | case DW_FORM_data2: | |
23056 | type = die_type (die, cu); | |
23057 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23058 | if (result == NULL) | |
23059 | result = write_constant_as_bytes (obstack, byte_order, | |
23060 | type, value, len); | |
23061 | break; | |
23062 | case DW_FORM_data4: | |
23063 | type = die_type (die, cu); | |
23064 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23065 | if (result == NULL) | |
23066 | result = write_constant_as_bytes (obstack, byte_order, | |
23067 | type, value, len); | |
23068 | break; | |
23069 | case DW_FORM_data8: | |
23070 | type = die_type (die, cu); | |
23071 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23072 | if (result == NULL) | |
23073 | result = write_constant_as_bytes (obstack, byte_order, | |
23074 | type, value, len); | |
23075 | break; | |
23076 | ||
23077 | case DW_FORM_sdata: | |
663c44ac | 23078 | case DW_FORM_implicit_const: |
b6807d98 TT |
23079 | type = die_type (die, cu); |
23080 | result = write_constant_as_bytes (obstack, byte_order, | |
23081 | type, DW_SND (attr), len); | |
23082 | break; | |
23083 | ||
23084 | case DW_FORM_udata: | |
23085 | type = die_type (die, cu); | |
23086 | result = write_constant_as_bytes (obstack, byte_order, | |
23087 | type, DW_UNSND (attr), len); | |
23088 | break; | |
23089 | ||
23090 | default: | |
b98664d3 | 23091 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23092 | dwarf_form_name (attr->form)); |
23093 | break; | |
23094 | } | |
23095 | ||
23096 | return result; | |
23097 | } | |
23098 | ||
7942e96e AA |
23099 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
23100 | valid type for this die is found. */ | |
23101 | ||
23102 | struct type * | |
9c541725 | 23103 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
23104 | struct dwarf2_per_cu_data *per_cu) |
23105 | { | |
23106 | struct dwarf2_cu *cu; | |
23107 | struct die_info *die; | |
23108 | ||
7942e96e | 23109 | if (per_cu->cu == NULL) |
58f0c718 | 23110 | load_cu (per_cu, false); |
7942e96e AA |
23111 | cu = per_cu->cu; |
23112 | if (!cu) | |
23113 | return NULL; | |
23114 | ||
9c541725 | 23115 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23116 | if (!die) |
23117 | return NULL; | |
23118 | ||
23119 | return die_type (die, cu); | |
23120 | } | |
23121 | ||
8a9b8146 TT |
23122 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
23123 | PER_CU. */ | |
23124 | ||
23125 | struct type * | |
b64f50a1 | 23126 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
23127 | struct dwarf2_per_cu_data *per_cu) |
23128 | { | |
9c541725 | 23129 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 23130 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
23131 | } |
23132 | ||
ac9ec31b | 23133 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23134 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23135 | On exit *REF_CU is the CU of the result. |
23136 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23137 | |
23138 | static struct die_info * | |
ac9ec31b DE |
23139 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23140 | struct dwarf2_cu **ref_cu) | |
348e048f | 23141 | { |
348e048f | 23142 | struct die_info temp_die; |
348e048f DE |
23143 | struct dwarf2_cu *sig_cu; |
23144 | struct die_info *die; | |
23145 | ||
ac9ec31b DE |
23146 | /* While it might be nice to assert sig_type->type == NULL here, |
23147 | we can get here for DW_AT_imported_declaration where we need | |
23148 | the DIE not the type. */ | |
348e048f DE |
23149 | |
23150 | /* If necessary, add it to the queue and load its DIEs. */ | |
23151 | ||
95554aad | 23152 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 23153 | read_signatured_type (sig_type); |
348e048f | 23154 | |
348e048f | 23155 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 23156 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23157 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23158 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23159 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23160 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23161 | if (die) |
23162 | { | |
ed2dc618 | 23163 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 23164 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 23165 | |
796a7ff8 DE |
23166 | /* For .gdb_index version 7 keep track of included TUs. |
23167 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
23168 | if (dwarf2_per_objfile->index_table != NULL | |
23169 | && dwarf2_per_objfile->index_table->version <= 7) | |
23170 | { | |
23171 | VEC_safe_push (dwarf2_per_cu_ptr, | |
23172 | (*ref_cu)->per_cu->imported_symtabs, | |
23173 | sig_cu->per_cu); | |
23174 | } | |
23175 | ||
348e048f DE |
23176 | *ref_cu = sig_cu; |
23177 | return die; | |
23178 | } | |
23179 | ||
ac9ec31b DE |
23180 | return NULL; |
23181 | } | |
23182 | ||
23183 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23184 | On entry *REF_CU is the CU of SRC_DIE. | |
23185 | On exit *REF_CU is the CU of the result. | |
23186 | The result is the DIE of the type. | |
23187 | If the referenced type cannot be found an error is thrown. */ | |
23188 | ||
23189 | static struct die_info * | |
ff39bb5e | 23190 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23191 | struct dwarf2_cu **ref_cu) |
23192 | { | |
23193 | ULONGEST signature = DW_SIGNATURE (attr); | |
23194 | struct signatured_type *sig_type; | |
23195 | struct die_info *die; | |
23196 | ||
23197 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23198 | ||
a2ce51a0 | 23199 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23200 | /* sig_type will be NULL if the signatured type is missing from |
23201 | the debug info. */ | |
23202 | if (sig_type == NULL) | |
23203 | { | |
23204 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
23205 | " from DIE at %s [in module %s]"), |
23206 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23207 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23208 | } |
23209 | ||
23210 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23211 | if (die == NULL) | |
23212 | { | |
23213 | dump_die_for_error (src_die); | |
23214 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23215 | " from DIE at %s [in module %s]"), |
23216 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23217 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23218 | } |
23219 | ||
23220 | return die; | |
23221 | } | |
23222 | ||
23223 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23224 | reading in and processing the type unit if necessary. */ | |
23225 | ||
23226 | static struct type * | |
23227 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23228 | struct dwarf2_cu *cu) | |
23229 | { | |
518817b3 SM |
23230 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23231 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
23232 | struct signatured_type *sig_type; |
23233 | struct dwarf2_cu *type_cu; | |
23234 | struct die_info *type_die; | |
23235 | struct type *type; | |
23236 | ||
a2ce51a0 | 23237 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23238 | /* sig_type will be NULL if the signatured type is missing from |
23239 | the debug info. */ | |
23240 | if (sig_type == NULL) | |
23241 | { | |
b98664d3 | 23242 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23243 | " from DIE at %s [in module %s]"), |
23244 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23245 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23246 | return build_error_marker_type (cu, die); |
23247 | } | |
23248 | ||
23249 | /* If we already know the type we're done. */ | |
23250 | if (sig_type->type != NULL) | |
23251 | return sig_type->type; | |
23252 | ||
23253 | type_cu = cu; | |
23254 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23255 | if (type_die != NULL) | |
23256 | { | |
23257 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23258 | is created. This is important, for example, because for c++ classes | |
23259 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23260 | type = read_type_die (type_die, type_cu); | |
23261 | if (type == NULL) | |
23262 | { | |
b98664d3 | 23263 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
23264 | " referenced from DIE at %s [in module %s]"), |
23265 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23266 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23267 | type = build_error_marker_type (cu, die); |
23268 | } | |
23269 | } | |
23270 | else | |
23271 | { | |
b98664d3 | 23272 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
23273 | " from DIE at %s [in module %s]"), |
23274 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23275 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23276 | type = build_error_marker_type (cu, die); |
23277 | } | |
23278 | sig_type->type = type; | |
23279 | ||
23280 | return type; | |
23281 | } | |
23282 | ||
23283 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23284 | reading in and processing the type unit if necessary. */ | |
23285 | ||
23286 | static struct type * | |
ff39bb5e | 23287 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23288 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23289 | { |
23290 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 23291 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
23292 | { |
23293 | struct dwarf2_cu *type_cu = cu; | |
23294 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23295 | ||
23296 | return read_type_die (type_die, type_cu); | |
23297 | } | |
23298 | else if (attr->form == DW_FORM_ref_sig8) | |
23299 | { | |
23300 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
23301 | } | |
23302 | else | |
23303 | { | |
518817b3 SM |
23304 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23305 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23306 | |
b98664d3 | 23307 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
23308 | " at %s [in module %s]"), |
23309 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 23310 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23311 | return build_error_marker_type (cu, die); |
23312 | } | |
348e048f DE |
23313 | } |
23314 | ||
e5fe5e75 | 23315 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23316 | |
23317 | static void | |
e5fe5e75 | 23318 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 23319 | { |
52dc124a | 23320 | struct signatured_type *sig_type; |
348e048f | 23321 | |
f4dc4d17 DE |
23322 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
23323 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
23324 | ||
6721b2ec DE |
23325 | /* We have the per_cu, but we need the signatured_type. |
23326 | Fortunately this is an easy translation. */ | |
23327 | gdb_assert (per_cu->is_debug_types); | |
23328 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23329 | |
6721b2ec | 23330 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23331 | |
52dc124a | 23332 | read_signatured_type (sig_type); |
348e048f | 23333 | |
6721b2ec | 23334 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
23335 | } |
23336 | ||
dee91e82 DE |
23337 | /* die_reader_func for read_signatured_type. |
23338 | This is identical to load_full_comp_unit_reader, | |
23339 | but is kept separate for now. */ | |
348e048f DE |
23340 | |
23341 | static void | |
dee91e82 | 23342 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 23343 | const gdb_byte *info_ptr, |
dee91e82 DE |
23344 | struct die_info *comp_unit_die, |
23345 | int has_children, | |
23346 | void *data) | |
348e048f | 23347 | { |
dee91e82 | 23348 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 23349 | |
dee91e82 DE |
23350 | gdb_assert (cu->die_hash == NULL); |
23351 | cu->die_hash = | |
23352 | htab_create_alloc_ex (cu->header.length / 12, | |
23353 | die_hash, | |
23354 | die_eq, | |
23355 | NULL, | |
23356 | &cu->comp_unit_obstack, | |
23357 | hashtab_obstack_allocate, | |
23358 | dummy_obstack_deallocate); | |
348e048f | 23359 | |
dee91e82 DE |
23360 | if (has_children) |
23361 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
23362 | &info_ptr, comp_unit_die); | |
23363 | cu->dies = comp_unit_die; | |
23364 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
23365 | |
23366 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 23367 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 23368 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
23369 | or we won't be able to build types correctly. |
23370 | Similarly, if we do not read the producer, we can not apply | |
23371 | producer-specific interpretation. */ | |
95554aad | 23372 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 23373 | } |
348e048f | 23374 | |
3019eac3 DE |
23375 | /* Read in a signatured type and build its CU and DIEs. |
23376 | If the type is a stub for the real type in a DWO file, | |
23377 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23378 | |
23379 | static void | |
23380 | read_signatured_type (struct signatured_type *sig_type) | |
23381 | { | |
23382 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 23383 | |
3019eac3 | 23384 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 23385 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23386 | |
58f0c718 | 23387 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, false, |
f4dc4d17 | 23388 | read_signatured_type_reader, NULL); |
7ee85ab1 | 23389 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
23390 | } |
23391 | ||
c906108c SS |
23392 | /* Decode simple location descriptions. |
23393 | Given a pointer to a dwarf block that defines a location, compute | |
23394 | the location and return the value. | |
23395 | ||
4cecd739 DJ |
23396 | NOTE drow/2003-11-18: This function is called in two situations |
23397 | now: for the address of static or global variables (partial symbols | |
23398 | only) and for offsets into structures which are expected to be | |
23399 | (more or less) constant. The partial symbol case should go away, | |
23400 | and only the constant case should remain. That will let this | |
23401 | function complain more accurately. A few special modes are allowed | |
23402 | without complaint for global variables (for instance, global | |
23403 | register values and thread-local values). | |
c906108c SS |
23404 | |
23405 | A location description containing no operations indicates that the | |
4cecd739 | 23406 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
23407 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
23408 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
23409 | complaint. |
23410 | ||
23411 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
23412 | |
23413 | static CORE_ADDR | |
e7c27a73 | 23414 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 23415 | { |
518817b3 | 23416 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
23417 | size_t i; |
23418 | size_t size = blk->size; | |
d521ce57 | 23419 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23420 | CORE_ADDR stack[64]; |
23421 | int stacki; | |
23422 | unsigned int bytes_read, unsnd; | |
23423 | gdb_byte op; | |
c906108c | 23424 | |
21ae7a4d JK |
23425 | i = 0; |
23426 | stacki = 0; | |
23427 | stack[stacki] = 0; | |
23428 | stack[++stacki] = 0; | |
23429 | ||
23430 | while (i < size) | |
23431 | { | |
23432 | op = data[i++]; | |
23433 | switch (op) | |
23434 | { | |
23435 | case DW_OP_lit0: | |
23436 | case DW_OP_lit1: | |
23437 | case DW_OP_lit2: | |
23438 | case DW_OP_lit3: | |
23439 | case DW_OP_lit4: | |
23440 | case DW_OP_lit5: | |
23441 | case DW_OP_lit6: | |
23442 | case DW_OP_lit7: | |
23443 | case DW_OP_lit8: | |
23444 | case DW_OP_lit9: | |
23445 | case DW_OP_lit10: | |
23446 | case DW_OP_lit11: | |
23447 | case DW_OP_lit12: | |
23448 | case DW_OP_lit13: | |
23449 | case DW_OP_lit14: | |
23450 | case DW_OP_lit15: | |
23451 | case DW_OP_lit16: | |
23452 | case DW_OP_lit17: | |
23453 | case DW_OP_lit18: | |
23454 | case DW_OP_lit19: | |
23455 | case DW_OP_lit20: | |
23456 | case DW_OP_lit21: | |
23457 | case DW_OP_lit22: | |
23458 | case DW_OP_lit23: | |
23459 | case DW_OP_lit24: | |
23460 | case DW_OP_lit25: | |
23461 | case DW_OP_lit26: | |
23462 | case DW_OP_lit27: | |
23463 | case DW_OP_lit28: | |
23464 | case DW_OP_lit29: | |
23465 | case DW_OP_lit30: | |
23466 | case DW_OP_lit31: | |
23467 | stack[++stacki] = op - DW_OP_lit0; | |
23468 | break; | |
f1bea926 | 23469 | |
21ae7a4d JK |
23470 | case DW_OP_reg0: |
23471 | case DW_OP_reg1: | |
23472 | case DW_OP_reg2: | |
23473 | case DW_OP_reg3: | |
23474 | case DW_OP_reg4: | |
23475 | case DW_OP_reg5: | |
23476 | case DW_OP_reg6: | |
23477 | case DW_OP_reg7: | |
23478 | case DW_OP_reg8: | |
23479 | case DW_OP_reg9: | |
23480 | case DW_OP_reg10: | |
23481 | case DW_OP_reg11: | |
23482 | case DW_OP_reg12: | |
23483 | case DW_OP_reg13: | |
23484 | case DW_OP_reg14: | |
23485 | case DW_OP_reg15: | |
23486 | case DW_OP_reg16: | |
23487 | case DW_OP_reg17: | |
23488 | case DW_OP_reg18: | |
23489 | case DW_OP_reg19: | |
23490 | case DW_OP_reg20: | |
23491 | case DW_OP_reg21: | |
23492 | case DW_OP_reg22: | |
23493 | case DW_OP_reg23: | |
23494 | case DW_OP_reg24: | |
23495 | case DW_OP_reg25: | |
23496 | case DW_OP_reg26: | |
23497 | case DW_OP_reg27: | |
23498 | case DW_OP_reg28: | |
23499 | case DW_OP_reg29: | |
23500 | case DW_OP_reg30: | |
23501 | case DW_OP_reg31: | |
23502 | stack[++stacki] = op - DW_OP_reg0; | |
23503 | if (i < size) | |
23504 | dwarf2_complex_location_expr_complaint (); | |
23505 | break; | |
c906108c | 23506 | |
21ae7a4d JK |
23507 | case DW_OP_regx: |
23508 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
23509 | i += bytes_read; | |
23510 | stack[++stacki] = unsnd; | |
23511 | if (i < size) | |
23512 | dwarf2_complex_location_expr_complaint (); | |
23513 | break; | |
c906108c | 23514 | |
21ae7a4d JK |
23515 | case DW_OP_addr: |
23516 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
23517 | cu, &bytes_read); | |
23518 | i += bytes_read; | |
23519 | break; | |
d53d4ac5 | 23520 | |
21ae7a4d JK |
23521 | case DW_OP_const1u: |
23522 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
23523 | i += 1; | |
23524 | break; | |
23525 | ||
23526 | case DW_OP_const1s: | |
23527 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
23528 | i += 1; | |
23529 | break; | |
23530 | ||
23531 | case DW_OP_const2u: | |
23532 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
23533 | i += 2; | |
23534 | break; | |
23535 | ||
23536 | case DW_OP_const2s: | |
23537 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
23538 | i += 2; | |
23539 | break; | |
d53d4ac5 | 23540 | |
21ae7a4d JK |
23541 | case DW_OP_const4u: |
23542 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
23543 | i += 4; | |
23544 | break; | |
23545 | ||
23546 | case DW_OP_const4s: | |
23547 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
23548 | i += 4; | |
23549 | break; | |
23550 | ||
585861ea JK |
23551 | case DW_OP_const8u: |
23552 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
23553 | i += 8; | |
23554 | break; | |
23555 | ||
21ae7a4d JK |
23556 | case DW_OP_constu: |
23557 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
23558 | &bytes_read); | |
23559 | i += bytes_read; | |
23560 | break; | |
23561 | ||
23562 | case DW_OP_consts: | |
23563 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
23564 | i += bytes_read; | |
23565 | break; | |
23566 | ||
23567 | case DW_OP_dup: | |
23568 | stack[stacki + 1] = stack[stacki]; | |
23569 | stacki++; | |
23570 | break; | |
23571 | ||
23572 | case DW_OP_plus: | |
23573 | stack[stacki - 1] += stack[stacki]; | |
23574 | stacki--; | |
23575 | break; | |
23576 | ||
23577 | case DW_OP_plus_uconst: | |
23578 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
23579 | &bytes_read); | |
23580 | i += bytes_read; | |
23581 | break; | |
23582 | ||
23583 | case DW_OP_minus: | |
23584 | stack[stacki - 1] -= stack[stacki]; | |
23585 | stacki--; | |
23586 | break; | |
23587 | ||
23588 | case DW_OP_deref: | |
23589 | /* If we're not the last op, then we definitely can't encode | |
23590 | this using GDB's address_class enum. This is valid for partial | |
23591 | global symbols, although the variable's address will be bogus | |
23592 | in the psymtab. */ | |
23593 | if (i < size) | |
23594 | dwarf2_complex_location_expr_complaint (); | |
23595 | break; | |
23596 | ||
23597 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 23598 | case DW_OP_form_tls_address: |
21ae7a4d JK |
23599 | /* The top of the stack has the offset from the beginning |
23600 | of the thread control block at which the variable is located. */ | |
23601 | /* Nothing should follow this operator, so the top of stack would | |
23602 | be returned. */ | |
23603 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23604 | address will be bogus in the psymtab. Make it always at least |
23605 | non-zero to not look as a variable garbage collected by linker | |
23606 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
23607 | if (i < size) |
23608 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 23609 | stack[stacki]++; |
21ae7a4d JK |
23610 | break; |
23611 | ||
23612 | case DW_OP_GNU_uninit: | |
23613 | break; | |
23614 | ||
3019eac3 | 23615 | case DW_OP_GNU_addr_index: |
49f6c839 | 23616 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23617 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23618 | &bytes_read); | |
23619 | i += bytes_read; | |
23620 | break; | |
23621 | ||
21ae7a4d JK |
23622 | default: |
23623 | { | |
f39c6ffd | 23624 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
23625 | |
23626 | if (name) | |
b98664d3 | 23627 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
23628 | name); |
23629 | else | |
b98664d3 | 23630 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
23631 | op); |
23632 | } | |
23633 | ||
23634 | return (stack[stacki]); | |
d53d4ac5 | 23635 | } |
3c6e0cb3 | 23636 | |
21ae7a4d JK |
23637 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
23638 | outside of the allocated space. Also enforce minimum>0. */ | |
23639 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
23640 | { | |
b98664d3 | 23641 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
23642 | return 0; |
23643 | } | |
23644 | ||
23645 | if (stacki <= 0) | |
23646 | { | |
b98664d3 | 23647 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
23648 | return 0; |
23649 | } | |
23650 | } | |
23651 | return (stack[stacki]); | |
c906108c SS |
23652 | } |
23653 | ||
23654 | /* memory allocation interface */ | |
23655 | ||
c906108c | 23656 | static struct dwarf_block * |
7b5a2f43 | 23657 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23658 | { |
8d749320 | 23659 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23660 | } |
23661 | ||
c906108c | 23662 | static struct die_info * |
b60c80d6 | 23663 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23664 | { |
23665 | struct die_info *die; | |
b60c80d6 DJ |
23666 | size_t size = sizeof (struct die_info); |
23667 | ||
23668 | if (num_attrs > 1) | |
23669 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23670 | |
b60c80d6 | 23671 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23672 | memset (die, 0, sizeof (struct die_info)); |
23673 | return (die); | |
23674 | } | |
2e276125 JB |
23675 | |
23676 | \f | |
23677 | /* Macro support. */ | |
23678 | ||
233d95b5 JK |
23679 | /* Return file name relative to the compilation directory of file number I in |
23680 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 23681 | responsible for freeing it. */ |
233d95b5 | 23682 | |
2e276125 | 23683 | static char * |
233d95b5 | 23684 | file_file_name (int file, struct line_header *lh) |
2e276125 | 23685 | { |
6a83a1e6 EZ |
23686 | /* Is the file number a valid index into the line header's file name |
23687 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 23688 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 23689 | { |
8c43009f | 23690 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 23691 | |
8c43009f PA |
23692 | if (!IS_ABSOLUTE_PATH (fe.name)) |
23693 | { | |
23694 | const char *dir = fe.include_dir (lh); | |
23695 | if (dir != NULL) | |
23696 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
23697 | } | |
23698 | return xstrdup (fe.name); | |
6a83a1e6 | 23699 | } |
2e276125 JB |
23700 | else |
23701 | { | |
6a83a1e6 EZ |
23702 | /* The compiler produced a bogus file number. We can at least |
23703 | record the macro definitions made in the file, even if we | |
23704 | won't be able to find the file by name. */ | |
23705 | char fake_name[80]; | |
9a619af0 | 23706 | |
8c042590 PM |
23707 | xsnprintf (fake_name, sizeof (fake_name), |
23708 | "<bad macro file number %d>", file); | |
2e276125 | 23709 | |
b98664d3 | 23710 | complaint (_("bad file number in macro information (%d)"), |
6a83a1e6 | 23711 | file); |
2e276125 | 23712 | |
6a83a1e6 | 23713 | return xstrdup (fake_name); |
2e276125 JB |
23714 | } |
23715 | } | |
23716 | ||
233d95b5 JK |
23717 | /* Return the full name of file number I in *LH's file name table. |
23718 | Use COMP_DIR as the name of the current directory of the | |
23719 | compilation. The result is allocated using xmalloc; the caller is | |
23720 | responsible for freeing it. */ | |
23721 | static char * | |
23722 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
23723 | { | |
23724 | /* Is the file number a valid index into the line header's file name | |
23725 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 23726 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
23727 | { |
23728 | char *relative = file_file_name (file, lh); | |
23729 | ||
23730 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
23731 | return relative; | |
b36cec19 PA |
23732 | return reconcat (relative, comp_dir, SLASH_STRING, |
23733 | relative, (char *) NULL); | |
233d95b5 JK |
23734 | } |
23735 | else | |
23736 | return file_file_name (file, lh); | |
23737 | } | |
23738 | ||
2e276125 JB |
23739 | |
23740 | static struct macro_source_file * | |
804d2729 TT |
23741 | macro_start_file (struct dwarf2_cu *cu, |
23742 | int file, int line, | |
2e276125 | 23743 | struct macro_source_file *current_file, |
43f3e411 | 23744 | struct line_header *lh) |
2e276125 | 23745 | { |
233d95b5 JK |
23746 | /* File name relative to the compilation directory of this source file. */ |
23747 | char *file_name = file_file_name (file, lh); | |
2e276125 | 23748 | |
2e276125 | 23749 | if (! current_file) |
abc9d0dc | 23750 | { |
fc474241 DE |
23751 | /* Note: We don't create a macro table for this compilation unit |
23752 | at all until we actually get a filename. */ | |
804d2729 | 23753 | struct macro_table *macro_table = cu->builder->get_macro_table (); |
fc474241 | 23754 | |
abc9d0dc TT |
23755 | /* If we have no current file, then this must be the start_file |
23756 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
23757 | current_file = macro_set_main (macro_table, file_name); |
23758 | macro_define_special (macro_table); | |
abc9d0dc | 23759 | } |
2e276125 | 23760 | else |
233d95b5 | 23761 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 23762 | |
233d95b5 | 23763 | xfree (file_name); |
6e70227d | 23764 | |
2e276125 JB |
23765 | return current_file; |
23766 | } | |
23767 | ||
2e276125 JB |
23768 | static const char * |
23769 | consume_improper_spaces (const char *p, const char *body) | |
23770 | { | |
23771 | if (*p == ' ') | |
23772 | { | |
b98664d3 | 23773 | complaint (_("macro definition contains spaces " |
3e43a32a | 23774 | "in formal argument list:\n`%s'"), |
4d3c2250 | 23775 | body); |
2e276125 JB |
23776 | |
23777 | while (*p == ' ') | |
23778 | p++; | |
23779 | } | |
23780 | ||
23781 | return p; | |
23782 | } | |
23783 | ||
23784 | ||
23785 | static void | |
23786 | parse_macro_definition (struct macro_source_file *file, int line, | |
23787 | const char *body) | |
23788 | { | |
23789 | const char *p; | |
23790 | ||
23791 | /* The body string takes one of two forms. For object-like macro | |
23792 | definitions, it should be: | |
23793 | ||
23794 | <macro name> " " <definition> | |
23795 | ||
23796 | For function-like macro definitions, it should be: | |
23797 | ||
23798 | <macro name> "() " <definition> | |
23799 | or | |
23800 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
23801 | ||
23802 | Spaces may appear only where explicitly indicated, and in the | |
23803 | <definition>. | |
23804 | ||
23805 | The Dwarf 2 spec says that an object-like macro's name is always | |
23806 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 23807 | the space when the macro's definition is the empty string. |
2e276125 JB |
23808 | |
23809 | The Dwarf 2 spec says that there should be no spaces between the | |
23810 | formal arguments in a function-like macro's formal argument list, | |
23811 | but versions of GCC around March 2002 include spaces after the | |
23812 | commas. */ | |
23813 | ||
23814 | ||
23815 | /* Find the extent of the macro name. The macro name is terminated | |
23816 | by either a space or null character (for an object-like macro) or | |
23817 | an opening paren (for a function-like macro). */ | |
23818 | for (p = body; *p; p++) | |
23819 | if (*p == ' ' || *p == '(') | |
23820 | break; | |
23821 | ||
23822 | if (*p == ' ' || *p == '\0') | |
23823 | { | |
23824 | /* It's an object-like macro. */ | |
23825 | int name_len = p - body; | |
3f8a7804 | 23826 | char *name = savestring (body, name_len); |
2e276125 JB |
23827 | const char *replacement; |
23828 | ||
23829 | if (*p == ' ') | |
23830 | replacement = body + name_len + 1; | |
23831 | else | |
23832 | { | |
4d3c2250 | 23833 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23834 | replacement = body + name_len; |
23835 | } | |
6e70227d | 23836 | |
2e276125 JB |
23837 | macro_define_object (file, line, name, replacement); |
23838 | ||
23839 | xfree (name); | |
23840 | } | |
23841 | else if (*p == '(') | |
23842 | { | |
23843 | /* It's a function-like macro. */ | |
3f8a7804 | 23844 | char *name = savestring (body, p - body); |
2e276125 JB |
23845 | int argc = 0; |
23846 | int argv_size = 1; | |
8d749320 | 23847 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
23848 | |
23849 | p++; | |
23850 | ||
23851 | p = consume_improper_spaces (p, body); | |
23852 | ||
23853 | /* Parse the formal argument list. */ | |
23854 | while (*p && *p != ')') | |
23855 | { | |
23856 | /* Find the extent of the current argument name. */ | |
23857 | const char *arg_start = p; | |
23858 | ||
23859 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
23860 | p++; | |
23861 | ||
23862 | if (! *p || p == arg_start) | |
4d3c2250 | 23863 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23864 | else |
23865 | { | |
23866 | /* Make sure argv has room for the new argument. */ | |
23867 | if (argc >= argv_size) | |
23868 | { | |
23869 | argv_size *= 2; | |
224c3ddb | 23870 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
23871 | } |
23872 | ||
3f8a7804 | 23873 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
23874 | } |
23875 | ||
23876 | p = consume_improper_spaces (p, body); | |
23877 | ||
23878 | /* Consume the comma, if present. */ | |
23879 | if (*p == ',') | |
23880 | { | |
23881 | p++; | |
23882 | ||
23883 | p = consume_improper_spaces (p, body); | |
23884 | } | |
23885 | } | |
23886 | ||
23887 | if (*p == ')') | |
23888 | { | |
23889 | p++; | |
23890 | ||
23891 | if (*p == ' ') | |
23892 | /* Perfectly formed definition, no complaints. */ | |
23893 | macro_define_function (file, line, name, | |
6e70227d | 23894 | argc, (const char **) argv, |
2e276125 JB |
23895 | p + 1); |
23896 | else if (*p == '\0') | |
23897 | { | |
23898 | /* Complain, but do define it. */ | |
4d3c2250 | 23899 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 23900 | macro_define_function (file, line, name, |
6e70227d | 23901 | argc, (const char **) argv, |
2e276125 JB |
23902 | p); |
23903 | } | |
23904 | else | |
23905 | /* Just complain. */ | |
4d3c2250 | 23906 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23907 | } |
23908 | else | |
23909 | /* Just complain. */ | |
4d3c2250 | 23910 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23911 | |
23912 | xfree (name); | |
23913 | { | |
23914 | int i; | |
23915 | ||
23916 | for (i = 0; i < argc; i++) | |
23917 | xfree (argv[i]); | |
23918 | } | |
23919 | xfree (argv); | |
23920 | } | |
23921 | else | |
4d3c2250 | 23922 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23923 | } |
23924 | ||
cf2c3c16 TT |
23925 | /* Skip some bytes from BYTES according to the form given in FORM. |
23926 | Returns the new pointer. */ | |
2e276125 | 23927 | |
d521ce57 TT |
23928 | static const gdb_byte * |
23929 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
23930 | enum dwarf_form form, |
23931 | unsigned int offset_size, | |
23932 | struct dwarf2_section_info *section) | |
2e276125 | 23933 | { |
cf2c3c16 | 23934 | unsigned int bytes_read; |
2e276125 | 23935 | |
cf2c3c16 | 23936 | switch (form) |
2e276125 | 23937 | { |
cf2c3c16 TT |
23938 | case DW_FORM_data1: |
23939 | case DW_FORM_flag: | |
23940 | ++bytes; | |
23941 | break; | |
23942 | ||
23943 | case DW_FORM_data2: | |
23944 | bytes += 2; | |
23945 | break; | |
23946 | ||
23947 | case DW_FORM_data4: | |
23948 | bytes += 4; | |
23949 | break; | |
23950 | ||
23951 | case DW_FORM_data8: | |
23952 | bytes += 8; | |
23953 | break; | |
23954 | ||
0224619f JK |
23955 | case DW_FORM_data16: |
23956 | bytes += 16; | |
23957 | break; | |
23958 | ||
cf2c3c16 TT |
23959 | case DW_FORM_string: |
23960 | read_direct_string (abfd, bytes, &bytes_read); | |
23961 | bytes += bytes_read; | |
23962 | break; | |
23963 | ||
23964 | case DW_FORM_sec_offset: | |
23965 | case DW_FORM_strp: | |
36586728 | 23966 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
23967 | bytes += offset_size; |
23968 | break; | |
23969 | ||
23970 | case DW_FORM_block: | |
23971 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
23972 | bytes += bytes_read; | |
23973 | break; | |
23974 | ||
23975 | case DW_FORM_block1: | |
23976 | bytes += 1 + read_1_byte (abfd, bytes); | |
23977 | break; | |
23978 | case DW_FORM_block2: | |
23979 | bytes += 2 + read_2_bytes (abfd, bytes); | |
23980 | break; | |
23981 | case DW_FORM_block4: | |
23982 | bytes += 4 + read_4_bytes (abfd, bytes); | |
23983 | break; | |
23984 | ||
23985 | case DW_FORM_sdata: | |
23986 | case DW_FORM_udata: | |
3019eac3 DE |
23987 | case DW_FORM_GNU_addr_index: |
23988 | case DW_FORM_GNU_str_index: | |
d521ce57 | 23989 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
23990 | if (bytes == NULL) |
23991 | { | |
23992 | dwarf2_section_buffer_overflow_complaint (section); | |
23993 | return NULL; | |
23994 | } | |
cf2c3c16 TT |
23995 | break; |
23996 | ||
663c44ac JK |
23997 | case DW_FORM_implicit_const: |
23998 | break; | |
23999 | ||
cf2c3c16 TT |
24000 | default: |
24001 | { | |
b98664d3 | 24002 | complaint (_("invalid form 0x%x in `%s'"), |
a32a8923 | 24003 | form, get_section_name (section)); |
cf2c3c16 TT |
24004 | return NULL; |
24005 | } | |
2e276125 JB |
24006 | } |
24007 | ||
cf2c3c16 TT |
24008 | return bytes; |
24009 | } | |
757a13d0 | 24010 | |
cf2c3c16 TT |
24011 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
24012 | opcode. Returns an updated pointer to the macro data buffer; or, | |
24013 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 24014 | |
d521ce57 | 24015 | static const gdb_byte * |
cf2c3c16 | 24016 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
24017 | const gdb_byte **opcode_definitions, |
24018 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
24019 | bfd *abfd, |
24020 | unsigned int offset_size, | |
24021 | struct dwarf2_section_info *section) | |
24022 | { | |
24023 | unsigned int bytes_read, i; | |
24024 | unsigned long arg; | |
d521ce57 | 24025 | const gdb_byte *defn; |
2e276125 | 24026 | |
cf2c3c16 | 24027 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 24028 | { |
b98664d3 | 24029 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
24030 | opcode); |
24031 | return NULL; | |
24032 | } | |
2e276125 | 24033 | |
cf2c3c16 TT |
24034 | defn = opcode_definitions[opcode]; |
24035 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
24036 | defn += bytes_read; | |
2e276125 | 24037 | |
cf2c3c16 TT |
24038 | for (i = 0; i < arg; ++i) |
24039 | { | |
aead7601 SM |
24040 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
24041 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 24042 | section); |
cf2c3c16 TT |
24043 | if (mac_ptr == NULL) |
24044 | { | |
24045 | /* skip_form_bytes already issued the complaint. */ | |
24046 | return NULL; | |
24047 | } | |
24048 | } | |
757a13d0 | 24049 | |
cf2c3c16 TT |
24050 | return mac_ptr; |
24051 | } | |
757a13d0 | 24052 | |
cf2c3c16 TT |
24053 | /* A helper function which parses the header of a macro section. |
24054 | If the macro section is the extended (for now called "GNU") type, | |
24055 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
24056 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 24057 | |
d521ce57 TT |
24058 | static const gdb_byte * |
24059 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 24060 | bfd *abfd, |
d521ce57 | 24061 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
24062 | unsigned int *offset_size, |
24063 | int section_is_gnu) | |
24064 | { | |
24065 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 24066 | |
cf2c3c16 TT |
24067 | if (section_is_gnu) |
24068 | { | |
24069 | unsigned int version, flags; | |
757a13d0 | 24070 | |
cf2c3c16 | 24071 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 24072 | if (version != 4 && version != 5) |
cf2c3c16 | 24073 | { |
b98664d3 | 24074 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
24075 | version); |
24076 | return NULL; | |
24077 | } | |
24078 | mac_ptr += 2; | |
757a13d0 | 24079 | |
cf2c3c16 TT |
24080 | flags = read_1_byte (abfd, mac_ptr); |
24081 | ++mac_ptr; | |
24082 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 24083 | |
cf2c3c16 TT |
24084 | if ((flags & 2) != 0) |
24085 | /* We don't need the line table offset. */ | |
24086 | mac_ptr += *offset_size; | |
757a13d0 | 24087 | |
cf2c3c16 TT |
24088 | /* Vendor opcode descriptions. */ |
24089 | if ((flags & 4) != 0) | |
24090 | { | |
24091 | unsigned int i, count; | |
757a13d0 | 24092 | |
cf2c3c16 TT |
24093 | count = read_1_byte (abfd, mac_ptr); |
24094 | ++mac_ptr; | |
24095 | for (i = 0; i < count; ++i) | |
24096 | { | |
24097 | unsigned int opcode, bytes_read; | |
24098 | unsigned long arg; | |
24099 | ||
24100 | opcode = read_1_byte (abfd, mac_ptr); | |
24101 | ++mac_ptr; | |
24102 | opcode_definitions[opcode] = mac_ptr; | |
24103 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24104 | mac_ptr += bytes_read; | |
24105 | mac_ptr += arg; | |
24106 | } | |
757a13d0 | 24107 | } |
cf2c3c16 | 24108 | } |
757a13d0 | 24109 | |
cf2c3c16 TT |
24110 | return mac_ptr; |
24111 | } | |
757a13d0 | 24112 | |
cf2c3c16 | 24113 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 24114 | including DW_MACRO_import. */ |
cf2c3c16 TT |
24115 | |
24116 | static void | |
804d2729 | 24117 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 24118 | bfd *abfd, |
d521ce57 | 24119 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 24120 | struct macro_source_file *current_file, |
43f3e411 | 24121 | struct line_header *lh, |
cf2c3c16 | 24122 | struct dwarf2_section_info *section, |
36586728 | 24123 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 24124 | unsigned int offset_size, |
8fc3fc34 | 24125 | htab_t include_hash) |
cf2c3c16 | 24126 | { |
804d2729 TT |
24127 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24128 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 24129 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
24130 | enum dwarf_macro_record_type macinfo_type; |
24131 | int at_commandline; | |
d521ce57 | 24132 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 24133 | |
cf2c3c16 TT |
24134 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
24135 | &offset_size, section_is_gnu); | |
24136 | if (mac_ptr == NULL) | |
24137 | { | |
24138 | /* We already issued a complaint. */ | |
24139 | return; | |
24140 | } | |
757a13d0 JK |
24141 | |
24142 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
24143 | GDB is still reading the definitions from command line. First | |
24144 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
24145 | to create CURRENT_FILE for the main source holding also the command line | |
24146 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
24147 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
24148 | ||
24149 | at_commandline = 1; | |
24150 | ||
24151 | do | |
24152 | { | |
24153 | /* Do we at least have room for a macinfo type byte? */ | |
24154 | if (mac_ptr >= mac_end) | |
24155 | { | |
f664829e | 24156 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
24157 | break; |
24158 | } | |
24159 | ||
aead7601 | 24160 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
24161 | mac_ptr++; |
24162 | ||
cf2c3c16 TT |
24163 | /* Note that we rely on the fact that the corresponding GNU and |
24164 | DWARF constants are the same. */ | |
132448f8 SM |
24165 | DIAGNOSTIC_PUSH |
24166 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
24167 | switch (macinfo_type) |
24168 | { | |
24169 | /* A zero macinfo type indicates the end of the macro | |
24170 | information. */ | |
24171 | case 0: | |
24172 | break; | |
2e276125 | 24173 | |
0af92d60 JK |
24174 | case DW_MACRO_define: |
24175 | case DW_MACRO_undef: | |
24176 | case DW_MACRO_define_strp: | |
24177 | case DW_MACRO_undef_strp: | |
24178 | case DW_MACRO_define_sup: | |
24179 | case DW_MACRO_undef_sup: | |
2e276125 | 24180 | { |
891d2f0b | 24181 | unsigned int bytes_read; |
2e276125 | 24182 | int line; |
d521ce57 | 24183 | const char *body; |
cf2c3c16 | 24184 | int is_define; |
2e276125 | 24185 | |
cf2c3c16 TT |
24186 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
24187 | mac_ptr += bytes_read; | |
24188 | ||
0af92d60 JK |
24189 | if (macinfo_type == DW_MACRO_define |
24190 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
24191 | { |
24192 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
24193 | mac_ptr += bytes_read; | |
24194 | } | |
24195 | else | |
24196 | { | |
24197 | LONGEST str_offset; | |
24198 | ||
24199 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24200 | mac_ptr += offset_size; | |
2e276125 | 24201 | |
0af92d60 JK |
24202 | if (macinfo_type == DW_MACRO_define_sup |
24203 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 24204 | || section_is_dwz) |
36586728 | 24205 | { |
ed2dc618 SM |
24206 | struct dwz_file *dwz |
24207 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 24208 | |
ed2dc618 SM |
24209 | body = read_indirect_string_from_dwz (objfile, |
24210 | dwz, str_offset); | |
36586728 TT |
24211 | } |
24212 | else | |
ed2dc618 SM |
24213 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
24214 | abfd, str_offset); | |
cf2c3c16 TT |
24215 | } |
24216 | ||
0af92d60 JK |
24217 | is_define = (macinfo_type == DW_MACRO_define |
24218 | || macinfo_type == DW_MACRO_define_strp | |
24219 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 24220 | if (! current_file) |
757a13d0 JK |
24221 | { |
24222 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 24223 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 24224 | "on line %d: %s"), |
cf2c3c16 TT |
24225 | is_define ? _("definition") : _("undefinition"), |
24226 | line, body); | |
757a13d0 JK |
24227 | break; |
24228 | } | |
3e43a32a MS |
24229 | if ((line == 0 && !at_commandline) |
24230 | || (line != 0 && at_commandline)) | |
b98664d3 | 24231 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 24232 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 24233 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
24234 | line == 0 ? _("zero") : _("non-zero"), line, body); |
24235 | ||
cf2c3c16 | 24236 | if (is_define) |
757a13d0 | 24237 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
24238 | else |
24239 | { | |
0af92d60 JK |
24240 | gdb_assert (macinfo_type == DW_MACRO_undef |
24241 | || macinfo_type == DW_MACRO_undef_strp | |
24242 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
24243 | macro_undef (current_file, line, body); |
24244 | } | |
2e276125 JB |
24245 | } |
24246 | break; | |
24247 | ||
0af92d60 | 24248 | case DW_MACRO_start_file: |
2e276125 | 24249 | { |
891d2f0b | 24250 | unsigned int bytes_read; |
2e276125 JB |
24251 | int line, file; |
24252 | ||
24253 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24254 | mac_ptr += bytes_read; | |
24255 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24256 | mac_ptr += bytes_read; | |
24257 | ||
3e43a32a MS |
24258 | if ((line == 0 && !at_commandline) |
24259 | || (line != 0 && at_commandline)) | |
b98664d3 | 24260 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
24261 | "from %s at %s line %d"), |
24262 | file, at_commandline ? _("command-line") : _("file"), | |
24263 | line == 0 ? _("zero") : _("non-zero"), line); | |
24264 | ||
24265 | if (at_commandline) | |
24266 | { | |
0af92d60 | 24267 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 24268 | pass one. */ |
757a13d0 JK |
24269 | at_commandline = 0; |
24270 | } | |
24271 | else | |
804d2729 TT |
24272 | current_file = macro_start_file (cu, file, line, current_file, |
24273 | lh); | |
2e276125 JB |
24274 | } |
24275 | break; | |
24276 | ||
0af92d60 | 24277 | case DW_MACRO_end_file: |
2e276125 | 24278 | if (! current_file) |
b98664d3 | 24279 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 24280 | "`close_file' directive")); |
2e276125 JB |
24281 | else |
24282 | { | |
24283 | current_file = current_file->included_by; | |
24284 | if (! current_file) | |
24285 | { | |
cf2c3c16 | 24286 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
24287 | |
24288 | /* GCC circa March 2002 doesn't produce the zero | |
24289 | type byte marking the end of the compilation | |
24290 | unit. Complain if it's not there, but exit no | |
24291 | matter what. */ | |
24292 | ||
24293 | /* Do we at least have room for a macinfo type byte? */ | |
24294 | if (mac_ptr >= mac_end) | |
24295 | { | |
f664829e | 24296 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
24297 | return; |
24298 | } | |
24299 | ||
24300 | /* We don't increment mac_ptr here, so this is just | |
24301 | a look-ahead. */ | |
aead7601 SM |
24302 | next_type |
24303 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
24304 | mac_ptr); | |
2e276125 | 24305 | if (next_type != 0) |
b98664d3 | 24306 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 24307 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
24308 | |
24309 | return; | |
24310 | } | |
24311 | } | |
24312 | break; | |
24313 | ||
0af92d60 JK |
24314 | case DW_MACRO_import: |
24315 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
24316 | { |
24317 | LONGEST offset; | |
8fc3fc34 | 24318 | void **slot; |
a036ba48 TT |
24319 | bfd *include_bfd = abfd; |
24320 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 24321 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 24322 | int is_dwz = section_is_dwz; |
d521ce57 | 24323 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
24324 | |
24325 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24326 | mac_ptr += offset_size; | |
24327 | ||
0af92d60 | 24328 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 24329 | { |
ed2dc618 | 24330 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 24331 | |
4d663531 | 24332 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 24333 | |
a036ba48 | 24334 | include_section = &dwz->macro; |
a32a8923 | 24335 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
24336 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
24337 | is_dwz = 1; | |
24338 | } | |
24339 | ||
24340 | new_mac_ptr = include_section->buffer + offset; | |
24341 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
24342 | ||
8fc3fc34 TT |
24343 | if (*slot != NULL) |
24344 | { | |
24345 | /* This has actually happened; see | |
24346 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 24347 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
24348 | ".debug_macro section")); |
24349 | } | |
24350 | else | |
24351 | { | |
d521ce57 | 24352 | *slot = (void *) new_mac_ptr; |
36586728 | 24353 | |
804d2729 | 24354 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 24355 | include_mac_end, current_file, lh, |
36586728 | 24356 | section, section_is_gnu, is_dwz, |
4d663531 | 24357 | offset_size, include_hash); |
8fc3fc34 | 24358 | |
d521ce57 | 24359 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 24360 | } |
cf2c3c16 TT |
24361 | } |
24362 | break; | |
24363 | ||
2e276125 | 24364 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
24365 | if (!section_is_gnu) |
24366 | { | |
24367 | unsigned int bytes_read; | |
2e276125 | 24368 | |
ac298888 TT |
24369 | /* This reads the constant, but since we don't recognize |
24370 | any vendor extensions, we ignore it. */ | |
24371 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
24372 | mac_ptr += bytes_read; |
24373 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24374 | mac_ptr += bytes_read; | |
2e276125 | 24375 | |
cf2c3c16 TT |
24376 | /* We don't recognize any vendor extensions. */ |
24377 | break; | |
24378 | } | |
24379 | /* FALLTHROUGH */ | |
24380 | ||
24381 | default: | |
24382 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24383 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24384 | section); |
24385 | if (mac_ptr == NULL) | |
24386 | return; | |
24387 | break; | |
2e276125 | 24388 | } |
132448f8 | 24389 | DIAGNOSTIC_POP |
757a13d0 | 24390 | } while (macinfo_type != 0); |
2e276125 | 24391 | } |
8e19ed76 | 24392 | |
cf2c3c16 | 24393 | static void |
09262596 | 24394 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 24395 | int section_is_gnu) |
cf2c3c16 | 24396 | { |
518817b3 SM |
24397 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24398 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 24399 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
24400 | struct line_header *lh = cu->line_header; |
24401 | bfd *abfd; | |
d521ce57 | 24402 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
24403 | struct macro_source_file *current_file = 0; |
24404 | enum dwarf_macro_record_type macinfo_type; | |
24405 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 24406 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 24407 | void **slot; |
09262596 DE |
24408 | struct dwarf2_section_info *section; |
24409 | const char *section_name; | |
24410 | ||
24411 | if (cu->dwo_unit != NULL) | |
24412 | { | |
24413 | if (section_is_gnu) | |
24414 | { | |
24415 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24416 | section_name = ".debug_macro.dwo"; | |
24417 | } | |
24418 | else | |
24419 | { | |
24420 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24421 | section_name = ".debug_macinfo.dwo"; | |
24422 | } | |
24423 | } | |
24424 | else | |
24425 | { | |
24426 | if (section_is_gnu) | |
24427 | { | |
24428 | section = &dwarf2_per_objfile->macro; | |
24429 | section_name = ".debug_macro"; | |
24430 | } | |
24431 | else | |
24432 | { | |
24433 | section = &dwarf2_per_objfile->macinfo; | |
24434 | section_name = ".debug_macinfo"; | |
24435 | } | |
24436 | } | |
cf2c3c16 | 24437 | |
bb5ed363 | 24438 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
24439 | if (section->buffer == NULL) |
24440 | { | |
b98664d3 | 24441 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
24442 | return; |
24443 | } | |
a32a8923 | 24444 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
24445 | |
24446 | /* First pass: Find the name of the base filename. | |
24447 | This filename is needed in order to process all macros whose definition | |
24448 | (or undefinition) comes from the command line. These macros are defined | |
24449 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
24450 | associated to the base file. | |
24451 | ||
24452 | To determine the base file name, we scan the macro definitions until we | |
24453 | reach the first DW_MACINFO_start_file entry. We then initialize | |
24454 | CURRENT_FILE accordingly so that any macro definition found before the | |
24455 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
24456 | ||
24457 | mac_ptr = section->buffer + offset; | |
24458 | mac_end = section->buffer + section->size; | |
24459 | ||
24460 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
24461 | &offset_size, section_is_gnu); | |
24462 | if (mac_ptr == NULL) | |
24463 | { | |
24464 | /* We already issued a complaint. */ | |
24465 | return; | |
24466 | } | |
24467 | ||
24468 | do | |
24469 | { | |
24470 | /* Do we at least have room for a macinfo type byte? */ | |
24471 | if (mac_ptr >= mac_end) | |
24472 | { | |
24473 | /* Complaint is printed during the second pass as GDB will probably | |
24474 | stop the first pass earlier upon finding | |
24475 | DW_MACINFO_start_file. */ | |
24476 | break; | |
24477 | } | |
24478 | ||
aead7601 | 24479 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
24480 | mac_ptr++; |
24481 | ||
24482 | /* Note that we rely on the fact that the corresponding GNU and | |
24483 | DWARF constants are the same. */ | |
132448f8 SM |
24484 | DIAGNOSTIC_PUSH |
24485 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
24486 | switch (macinfo_type) |
24487 | { | |
24488 | /* A zero macinfo type indicates the end of the macro | |
24489 | information. */ | |
24490 | case 0: | |
24491 | break; | |
24492 | ||
0af92d60 JK |
24493 | case DW_MACRO_define: |
24494 | case DW_MACRO_undef: | |
cf2c3c16 TT |
24495 | /* Only skip the data by MAC_PTR. */ |
24496 | { | |
24497 | unsigned int bytes_read; | |
24498 | ||
24499 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24500 | mac_ptr += bytes_read; | |
24501 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24502 | mac_ptr += bytes_read; | |
24503 | } | |
24504 | break; | |
24505 | ||
0af92d60 | 24506 | case DW_MACRO_start_file: |
cf2c3c16 TT |
24507 | { |
24508 | unsigned int bytes_read; | |
24509 | int line, file; | |
24510 | ||
24511 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24512 | mac_ptr += bytes_read; | |
24513 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24514 | mac_ptr += bytes_read; | |
24515 | ||
804d2729 | 24516 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
24517 | } |
24518 | break; | |
24519 | ||
0af92d60 | 24520 | case DW_MACRO_end_file: |
cf2c3c16 TT |
24521 | /* No data to skip by MAC_PTR. */ |
24522 | break; | |
24523 | ||
0af92d60 JK |
24524 | case DW_MACRO_define_strp: |
24525 | case DW_MACRO_undef_strp: | |
24526 | case DW_MACRO_define_sup: | |
24527 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
24528 | { |
24529 | unsigned int bytes_read; | |
24530 | ||
24531 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24532 | mac_ptr += bytes_read; | |
24533 | mac_ptr += offset_size; | |
24534 | } | |
24535 | break; | |
24536 | ||
0af92d60 JK |
24537 | case DW_MACRO_import: |
24538 | case DW_MACRO_import_sup: | |
cf2c3c16 | 24539 | /* Note that, according to the spec, a transparent include |
0af92d60 | 24540 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
24541 | skip this opcode. */ |
24542 | mac_ptr += offset_size; | |
24543 | break; | |
24544 | ||
24545 | case DW_MACINFO_vendor_ext: | |
24546 | /* Only skip the data by MAC_PTR. */ | |
24547 | if (!section_is_gnu) | |
24548 | { | |
24549 | unsigned int bytes_read; | |
24550 | ||
24551 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24552 | mac_ptr += bytes_read; | |
24553 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24554 | mac_ptr += bytes_read; | |
24555 | } | |
24556 | /* FALLTHROUGH */ | |
24557 | ||
24558 | default: | |
24559 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24560 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24561 | section); |
24562 | if (mac_ptr == NULL) | |
24563 | return; | |
24564 | break; | |
24565 | } | |
132448f8 | 24566 | DIAGNOSTIC_POP |
cf2c3c16 TT |
24567 | } while (macinfo_type != 0 && current_file == NULL); |
24568 | ||
24569 | /* Second pass: Process all entries. | |
24570 | ||
24571 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
24572 | command-line macro definitions/undefinitions. This flag is unset when we | |
24573 | reach the first DW_MACINFO_start_file entry. */ | |
24574 | ||
fc4007c9 TT |
24575 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
24576 | htab_eq_pointer, | |
24577 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 24578 | mac_ptr = section->buffer + offset; |
fc4007c9 | 24579 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 24580 | *slot = (void *) mac_ptr; |
804d2729 | 24581 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 24582 | current_file, lh, section, |
fc4007c9 TT |
24583 | section_is_gnu, 0, offset_size, |
24584 | include_hash.get ()); | |
cf2c3c16 TT |
24585 | } |
24586 | ||
8e19ed76 | 24587 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 24588 | if so return true else false. */ |
380bca97 | 24589 | |
8e19ed76 | 24590 | static int |
6e5a29e1 | 24591 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
24592 | { |
24593 | return (attr == NULL ? 0 : | |
24594 | attr->form == DW_FORM_block1 | |
24595 | || attr->form == DW_FORM_block2 | |
24596 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
24597 | || attr->form == DW_FORM_block |
24598 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 24599 | } |
4c2df51b | 24600 | |
c6a0999f JB |
24601 | /* Return non-zero if ATTR's value is a section offset --- classes |
24602 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
24603 | You may use DW_UNSND (attr) to retrieve such offsets. | |
24604 | ||
24605 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
24606 | may have a value that belongs to more than one of these classes; it | |
24607 | would be ambiguous if we did, because we use the same forms for all | |
24608 | of them. */ | |
380bca97 | 24609 | |
3690dd37 | 24610 | static int |
6e5a29e1 | 24611 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
24612 | { |
24613 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
24614 | || attr->form == DW_FORM_data8 |
24615 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
24616 | } |
24617 | ||
3690dd37 JB |
24618 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
24619 | zero otherwise. When this function returns true, you can apply | |
24620 | dwarf2_get_attr_constant_value to it. | |
24621 | ||
24622 | However, note that for some attributes you must check | |
24623 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
24624 | and DW_FORM_data8 are members of both the constant class, and of | |
24625 | the classes that contain offsets into other debug sections | |
24626 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
24627 | that, if an attribute's can be either a constant or one of the | |
24628 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
24629 | taken as section offsets, not constants. |
24630 | ||
24631 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
24632 | cannot handle that. */ | |
380bca97 | 24633 | |
3690dd37 | 24634 | static int |
6e5a29e1 | 24635 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
24636 | { |
24637 | switch (attr->form) | |
24638 | { | |
24639 | case DW_FORM_sdata: | |
24640 | case DW_FORM_udata: | |
24641 | case DW_FORM_data1: | |
24642 | case DW_FORM_data2: | |
24643 | case DW_FORM_data4: | |
24644 | case DW_FORM_data8: | |
663c44ac | 24645 | case DW_FORM_implicit_const: |
3690dd37 JB |
24646 | return 1; |
24647 | default: | |
24648 | return 0; | |
24649 | } | |
24650 | } | |
24651 | ||
7771576e SA |
24652 | |
24653 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
24654 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
24655 | ||
24656 | static int | |
6e5a29e1 | 24657 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
24658 | { |
24659 | switch (attr->form) | |
24660 | { | |
24661 | case DW_FORM_ref_addr: | |
24662 | case DW_FORM_ref1: | |
24663 | case DW_FORM_ref2: | |
24664 | case DW_FORM_ref4: | |
24665 | case DW_FORM_ref8: | |
24666 | case DW_FORM_ref_udata: | |
24667 | case DW_FORM_GNU_ref_alt: | |
24668 | return 1; | |
24669 | default: | |
24670 | return 0; | |
24671 | } | |
24672 | } | |
24673 | ||
3019eac3 DE |
24674 | /* Return the .debug_loc section to use for CU. |
24675 | For DWO files use .debug_loc.dwo. */ | |
24676 | ||
24677 | static struct dwarf2_section_info * | |
24678 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
24679 | { | |
518817b3 SM |
24680 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24681 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 24682 | |
3019eac3 | 24683 | if (cu->dwo_unit) |
43988095 JK |
24684 | { |
24685 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
24686 | ||
24687 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
24688 | } | |
24689 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
24690 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
24691 | } |
24692 | ||
8cf6f0b1 TT |
24693 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
24694 | ||
24695 | static void | |
24696 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
24697 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 24698 | const struct attribute *attr) |
8cf6f0b1 | 24699 | { |
518817b3 SM |
24700 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24701 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
24702 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
24703 | ||
24704 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
24705 | |
24706 | baton->per_cu = cu->per_cu; | |
24707 | gdb_assert (baton->per_cu); | |
24708 | /* We don't know how long the location list is, but make sure we | |
24709 | don't run off the edge of the section. */ | |
3019eac3 DE |
24710 | baton->size = section->size - DW_UNSND (attr); |
24711 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 24712 | baton->base_address = cu->base_address; |
f664829e | 24713 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
24714 | } |
24715 | ||
4c2df51b | 24716 | static void |
ff39bb5e | 24717 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 24718 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 24719 | { |
518817b3 SM |
24720 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24721 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 24722 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 24723 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 24724 | |
3690dd37 | 24725 | if (attr_form_is_section_offset (attr) |
3019eac3 | 24726 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
24727 | the section. If so, fall through to the complaint in the |
24728 | other branch. */ | |
3019eac3 | 24729 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 24730 | { |
0d53c4c4 | 24731 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 24732 | |
8d749320 | 24733 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 24734 | |
8cf6f0b1 | 24735 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 24736 | |
d00adf39 | 24737 | if (cu->base_known == 0) |
b98664d3 | 24738 | complaint (_("Location list used without " |
3e43a32a | 24739 | "specifying the CU base address.")); |
4c2df51b | 24740 | |
f1e6e072 TT |
24741 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24742 | ? dwarf2_loclist_block_index | |
24743 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24744 | SYMBOL_LOCATION_BATON (sym) = baton; |
24745 | } | |
24746 | else | |
24747 | { | |
24748 | struct dwarf2_locexpr_baton *baton; | |
24749 | ||
8d749320 | 24750 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
24751 | baton->per_cu = cu->per_cu; |
24752 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
24753 | |
24754 | if (attr_form_is_block (attr)) | |
24755 | { | |
24756 | /* Note that we're just copying the block's data pointer | |
24757 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24758 | info_buffer for SYM's objfile; right now we never release |
24759 | that buffer, but when we do clean up properly this may | |
24760 | need to change. */ | |
0d53c4c4 DJ |
24761 | baton->size = DW_BLOCK (attr)->size; |
24762 | baton->data = DW_BLOCK (attr)->data; | |
24763 | } | |
24764 | else | |
24765 | { | |
24766 | dwarf2_invalid_attrib_class_complaint ("location description", | |
24767 | SYMBOL_NATURAL_NAME (sym)); | |
24768 | baton->size = 0; | |
0d53c4c4 | 24769 | } |
6e70227d | 24770 | |
f1e6e072 TT |
24771 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24772 | ? dwarf2_locexpr_block_index | |
24773 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24774 | SYMBOL_LOCATION_BATON (sym) = baton; |
24775 | } | |
4c2df51b | 24776 | } |
6502dd73 | 24777 | |
9aa1f1e3 TT |
24778 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
24779 | came from a separate debuginfo file, then the master objfile is | |
24780 | returned. */ | |
ae0d2f24 UW |
24781 | |
24782 | struct objfile * | |
24783 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
24784 | { | |
e3b94546 | 24785 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
24786 | |
24787 | /* Return the master objfile, so that we can report and look up the | |
24788 | correct file containing this variable. */ | |
24789 | if (objfile->separate_debug_objfile_backlink) | |
24790 | objfile = objfile->separate_debug_objfile_backlink; | |
24791 | ||
24792 | return objfile; | |
24793 | } | |
24794 | ||
96408a79 SA |
24795 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
24796 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
24797 | CU_HEADERP first. */ | |
24798 | ||
24799 | static const struct comp_unit_head * | |
24800 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
24801 | struct dwarf2_per_cu_data *per_cu) | |
24802 | { | |
d521ce57 | 24803 | const gdb_byte *info_ptr; |
96408a79 SA |
24804 | |
24805 | if (per_cu->cu) | |
24806 | return &per_cu->cu->header; | |
24807 | ||
9c541725 | 24808 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
24809 | |
24810 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
24811 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
24812 | rcuh_kind::COMPILE); | |
96408a79 SA |
24813 | |
24814 | return cu_headerp; | |
24815 | } | |
24816 | ||
ae0d2f24 UW |
24817 | /* Return the address size given in the compilation unit header for CU. */ |
24818 | ||
98714339 | 24819 | int |
ae0d2f24 UW |
24820 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
24821 | { | |
96408a79 SA |
24822 | struct comp_unit_head cu_header_local; |
24823 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 24824 | |
96408a79 SA |
24825 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
24826 | ||
24827 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
24828 | } |
24829 | ||
9eae7c52 TT |
24830 | /* Return the offset size given in the compilation unit header for CU. */ |
24831 | ||
24832 | int | |
24833 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
24834 | { | |
96408a79 SA |
24835 | struct comp_unit_head cu_header_local; |
24836 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 24837 | |
96408a79 SA |
24838 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
24839 | ||
24840 | return cu_headerp->offset_size; | |
24841 | } | |
24842 | ||
24843 | /* See its dwarf2loc.h declaration. */ | |
24844 | ||
24845 | int | |
24846 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
24847 | { | |
24848 | struct comp_unit_head cu_header_local; | |
24849 | const struct comp_unit_head *cu_headerp; | |
24850 | ||
24851 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
24852 | ||
24853 | if (cu_headerp->version == 2) | |
24854 | return cu_headerp->addr_size; | |
24855 | else | |
24856 | return cu_headerp->offset_size; | |
181cebd4 JK |
24857 | } |
24858 | ||
9aa1f1e3 TT |
24859 | /* Return the text offset of the CU. The returned offset comes from |
24860 | this CU's objfile. If this objfile came from a separate debuginfo | |
24861 | file, then the offset may be different from the corresponding | |
24862 | offset in the parent objfile. */ | |
24863 | ||
24864 | CORE_ADDR | |
24865 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
24866 | { | |
e3b94546 | 24867 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
9aa1f1e3 TT |
24868 | |
24869 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24870 | } | |
24871 | ||
43988095 JK |
24872 | /* Return DWARF version number of PER_CU. */ |
24873 | ||
24874 | short | |
24875 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
24876 | { | |
24877 | return per_cu->dwarf_version; | |
24878 | } | |
24879 | ||
348e048f DE |
24880 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
24881 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
24882 | |
24883 | static struct dwarf2_per_cu_data * | |
9c541725 | 24884 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 24885 | unsigned int offset_in_dwz, |
ed2dc618 | 24886 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
24887 | { |
24888 | struct dwarf2_per_cu_data *this_cu; | |
24889 | int low, high; | |
36586728 | 24890 | const sect_offset *cu_off; |
ae038cb0 | 24891 | |
ae038cb0 | 24892 | low = 0; |
b76e467d | 24893 | high = dwarf2_per_objfile->all_comp_units.size () - 1; |
ae038cb0 DJ |
24894 | while (high > low) |
24895 | { | |
36586728 | 24896 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24897 | int mid = low + (high - low) / 2; |
9a619af0 | 24898 | |
36586728 | 24899 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 24900 | cu_off = &mid_cu->sect_off; |
36586728 | 24901 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 24902 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
24903 | high = mid; |
24904 | else | |
24905 | low = mid + 1; | |
24906 | } | |
24907 | gdb_assert (low == high); | |
36586728 | 24908 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
24909 | cu_off = &this_cu->sect_off; |
24910 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 24911 | { |
36586728 | 24912 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24913 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
24914 | "offset %s [in module %s]"), |
24915 | sect_offset_str (sect_off), | |
ed2dc618 | 24916 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 24917 | |
9c541725 PA |
24918 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
24919 | <= sect_off); | |
ae038cb0 DJ |
24920 | return dwarf2_per_objfile->all_comp_units[low-1]; |
24921 | } | |
24922 | else | |
24923 | { | |
24924 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
b76e467d | 24925 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 24926 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 24927 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 24928 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
24929 | return this_cu; |
24930 | } | |
24931 | } | |
24932 | ||
23745b47 | 24933 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 24934 | |
fcd3b13d SM |
24935 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
24936 | : per_cu (per_cu_), | |
24937 | mark (0), | |
24938 | has_loclist (0), | |
24939 | checked_producer (0), | |
24940 | producer_is_gxx_lt_4_6 (0), | |
24941 | producer_is_gcc_lt_4_3 (0), | |
24942 | producer_is_icc_lt_14 (0), | |
24943 | processing_has_namespace_info (0) | |
93311388 | 24944 | { |
fcd3b13d SM |
24945 | per_cu->cu = this; |
24946 | } | |
24947 | ||
24948 | /* Destroy a dwarf2_cu. */ | |
24949 | ||
24950 | dwarf2_cu::~dwarf2_cu () | |
24951 | { | |
24952 | per_cu->cu = NULL; | |
9816fde3 JK |
24953 | } |
24954 | ||
24955 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
24956 | ||
24957 | static void | |
95554aad TT |
24958 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24959 | enum language pretend_language) | |
9816fde3 JK |
24960 | { |
24961 | struct attribute *attr; | |
24962 | ||
24963 | /* Set the language we're debugging. */ | |
24964 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
24965 | if (attr) | |
24966 | set_cu_language (DW_UNSND (attr), cu); | |
24967 | else | |
9cded63f | 24968 | { |
95554aad | 24969 | cu->language = pretend_language; |
9cded63f TT |
24970 | cu->language_defn = language_def (cu->language); |
24971 | } | |
dee91e82 | 24972 | |
7d45c7c3 | 24973 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24974 | } |
24975 | ||
ae038cb0 DJ |
24976 | /* Increase the age counter on each cached compilation unit, and free |
24977 | any that are too old. */ | |
24978 | ||
24979 | static void | |
ed2dc618 | 24980 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
24981 | { |
24982 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
24983 | ||
24984 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
24985 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24986 | while (per_cu != NULL) | |
24987 | { | |
24988 | per_cu->cu->last_used ++; | |
b4f54984 | 24989 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
24990 | dwarf2_mark (per_cu->cu); |
24991 | per_cu = per_cu->cu->read_in_chain; | |
24992 | } | |
24993 | ||
24994 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24995 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
24996 | while (per_cu != NULL) | |
24997 | { | |
24998 | struct dwarf2_per_cu_data *next_cu; | |
24999 | ||
25000 | next_cu = per_cu->cu->read_in_chain; | |
25001 | ||
25002 | if (!per_cu->cu->mark) | |
25003 | { | |
fcd3b13d | 25004 | delete per_cu->cu; |
ae038cb0 DJ |
25005 | *last_chain = next_cu; |
25006 | } | |
25007 | else | |
25008 | last_chain = &per_cu->cu->read_in_chain; | |
25009 | ||
25010 | per_cu = next_cu; | |
25011 | } | |
25012 | } | |
25013 | ||
25014 | /* Remove a single compilation unit from the cache. */ | |
25015 | ||
25016 | static void | |
dee91e82 | 25017 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
25018 | { |
25019 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
25020 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25021 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
25022 | |
25023 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25024 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25025 | while (per_cu != NULL) | |
25026 | { | |
25027 | struct dwarf2_per_cu_data *next_cu; | |
25028 | ||
25029 | next_cu = per_cu->cu->read_in_chain; | |
25030 | ||
dee91e82 | 25031 | if (per_cu == target_per_cu) |
ae038cb0 | 25032 | { |
fcd3b13d | 25033 | delete per_cu->cu; |
dee91e82 | 25034 | per_cu->cu = NULL; |
ae038cb0 DJ |
25035 | *last_chain = next_cu; |
25036 | break; | |
25037 | } | |
25038 | else | |
25039 | last_chain = &per_cu->cu->read_in_chain; | |
25040 | ||
25041 | per_cu = next_cu; | |
25042 | } | |
25043 | } | |
25044 | ||
d95d3aef | 25045 | /* Cleanup function for the dwarf2_per_objfile data. */ |
fe3e1990 | 25046 | |
d95d3aef TT |
25047 | static void |
25048 | dwarf2_free_objfile (struct objfile *objfile, void *datum) | |
fe3e1990 | 25049 | { |
ed2dc618 | 25050 | struct dwarf2_per_objfile *dwarf2_per_objfile |
d95d3aef | 25051 | = static_cast<struct dwarf2_per_objfile *> (datum); |
fe3e1990 | 25052 | |
fd90ace4 | 25053 | delete dwarf2_per_objfile; |
fe3e1990 DJ |
25054 | } |
25055 | ||
dee91e82 DE |
25056 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
25057 | We store these in a hash table separate from the DIEs, and preserve them | |
25058 | when the DIEs are flushed out of cache. | |
25059 | ||
25060 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 25061 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
25062 | or the type may come from a DWO file. Furthermore, while it's more logical |
25063 | to use per_cu->section+offset, with Fission the section with the data is in | |
25064 | the DWO file but we don't know that section at the point we need it. | |
25065 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
25066 | because we can enter the lookup routine, get_die_type_at_offset, from | |
25067 | outside this file, and thus won't necessarily have PER_CU->cu. | |
25068 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 25069 | |
dee91e82 | 25070 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 25071 | { |
dee91e82 | 25072 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 25073 | sect_offset sect_off; |
1c379e20 DJ |
25074 | struct type *type; |
25075 | }; | |
25076 | ||
dee91e82 | 25077 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25078 | |
25079 | static hashval_t | |
dee91e82 | 25080 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 25081 | { |
9a3c8263 SM |
25082 | const struct dwarf2_per_cu_offset_and_type *ofs |
25083 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 25084 | |
9c541725 | 25085 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
25086 | } |
25087 | ||
dee91e82 | 25088 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25089 | |
25090 | static int | |
dee91e82 | 25091 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 25092 | { |
9a3c8263 SM |
25093 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
25094 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
25095 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
25096 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 25097 | |
dee91e82 | 25098 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 25099 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
25100 | } |
25101 | ||
25102 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
25103 | table if necessary. For convenience, return TYPE. |
25104 | ||
25105 | The DIEs reading must have careful ordering to: | |
25106 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
25107 | reading current DIE. | |
25108 | * Not trying to dereference contents of still incompletely read in types | |
25109 | while reading in other DIEs. | |
25110 | * Enable referencing still incompletely read in types just by a pointer to | |
25111 | the type without accessing its fields. | |
25112 | ||
25113 | Therefore caller should follow these rules: | |
25114 | * Try to fetch any prerequisite types we may need to build this DIE type | |
25115 | before building the type and calling set_die_type. | |
e71ec853 | 25116 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
25117 | possible before fetching more types to complete the current type. |
25118 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 25119 | |
f792889a | 25120 | static struct type * |
1c379e20 DJ |
25121 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
25122 | { | |
518817b3 SM |
25123 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25124 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 25125 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 25126 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
25127 | struct attribute *attr; |
25128 | struct dynamic_prop prop; | |
1c379e20 | 25129 | |
b4ba55a1 JB |
25130 | /* For Ada types, make sure that the gnat-specific data is always |
25131 | initialized (if not already set). There are a few types where | |
25132 | we should not be doing so, because the type-specific area is | |
25133 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
25134 | where the type-specific area is used to store the floatformat). | |
25135 | But this is not a problem, because the gnat-specific information | |
25136 | is actually not needed for these types. */ | |
25137 | if (need_gnat_info (cu) | |
25138 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
25139 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
25140 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
25141 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
25142 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
25143 | && !HAVE_GNAT_AUX_INFO (type)) |
25144 | INIT_GNAT_SPECIFIC (type); | |
25145 | ||
3f2f83dd KB |
25146 | /* Read DW_AT_allocated and set in type. */ |
25147 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
25148 | if (attr_form_is_block (attr)) | |
25149 | { | |
25150 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
50a82047 | 25151 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
25152 | } |
25153 | else if (attr != NULL) | |
25154 | { | |
b98664d3 | 25155 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 25156 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25157 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25158 | } |
25159 | ||
25160 | /* Read DW_AT_associated and set in type. */ | |
25161 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
25162 | if (attr_form_is_block (attr)) | |
25163 | { | |
25164 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
50a82047 | 25165 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
25166 | } |
25167 | else if (attr != NULL) | |
25168 | { | |
b98664d3 | 25169 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 25170 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25171 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25172 | } |
25173 | ||
3cdcd0ce JB |
25174 | /* Read DW_AT_data_location and set in type. */ |
25175 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
25176 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
50a82047 | 25177 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 25178 | |
dee91e82 | 25179 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25180 | { |
dee91e82 DE |
25181 | dwarf2_per_objfile->die_type_hash = |
25182 | htab_create_alloc_ex (127, | |
25183 | per_cu_offset_and_type_hash, | |
25184 | per_cu_offset_and_type_eq, | |
25185 | NULL, | |
25186 | &objfile->objfile_obstack, | |
25187 | hashtab_obstack_allocate, | |
25188 | dummy_obstack_deallocate); | |
f792889a | 25189 | } |
1c379e20 | 25190 | |
dee91e82 | 25191 | ofs.per_cu = cu->per_cu; |
9c541725 | 25192 | ofs.sect_off = die->sect_off; |
1c379e20 | 25193 | ofs.type = type; |
dee91e82 DE |
25194 | slot = (struct dwarf2_per_cu_offset_and_type **) |
25195 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 | 25196 | if (*slot) |
b98664d3 | 25197 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 25198 | sect_offset_str (die->sect_off)); |
8d749320 SM |
25199 | *slot = XOBNEW (&objfile->objfile_obstack, |
25200 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 25201 | **slot = ofs; |
f792889a | 25202 | return type; |
1c379e20 DJ |
25203 | } |
25204 | ||
9c541725 | 25205 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 25206 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
25207 | |
25208 | static struct type * | |
9c541725 | 25209 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 25210 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 25211 | { |
dee91e82 | 25212 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 25213 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 25214 | |
dee91e82 | 25215 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25216 | return NULL; |
1c379e20 | 25217 | |
dee91e82 | 25218 | ofs.per_cu = per_cu; |
9c541725 | 25219 | ofs.sect_off = sect_off; |
9a3c8263 SM |
25220 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
25221 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
25222 | if (slot) |
25223 | return slot->type; | |
25224 | else | |
25225 | return NULL; | |
25226 | } | |
25227 | ||
02142a6c | 25228 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
25229 | or return NULL if DIE does not have a saved type. */ |
25230 | ||
25231 | static struct type * | |
25232 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
25233 | { | |
9c541725 | 25234 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
25235 | } |
25236 | ||
10b3939b DJ |
25237 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
25238 | ||
25239 | static void | |
25240 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
25241 | struct dwarf2_per_cu_data *ref_per_cu) | |
25242 | { | |
25243 | void **slot; | |
25244 | ||
25245 | if (cu->dependencies == NULL) | |
25246 | cu->dependencies | |
25247 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
25248 | NULL, &cu->comp_unit_obstack, | |
25249 | hashtab_obstack_allocate, | |
25250 | dummy_obstack_deallocate); | |
25251 | ||
25252 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
25253 | if (*slot == NULL) | |
25254 | *slot = ref_per_cu; | |
25255 | } | |
1c379e20 | 25256 | |
f504f079 DE |
25257 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
25258 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
25259 | cache that we must keep because we are keeping CU. */ |
25260 | ||
10b3939b DJ |
25261 | static int |
25262 | dwarf2_mark_helper (void **slot, void *data) | |
25263 | { | |
25264 | struct dwarf2_per_cu_data *per_cu; | |
25265 | ||
25266 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
25267 | |
25268 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
25269 | reading of the chain. As such dependencies remain valid it is not much | |
25270 | useful to track and undo them during QUIT cleanups. */ | |
25271 | if (per_cu->cu == NULL) | |
25272 | return 1; | |
25273 | ||
10b3939b DJ |
25274 | if (per_cu->cu->mark) |
25275 | return 1; | |
25276 | per_cu->cu->mark = 1; | |
25277 | ||
25278 | if (per_cu->cu->dependencies != NULL) | |
25279 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
25280 | ||
25281 | return 1; | |
25282 | } | |
25283 | ||
f504f079 DE |
25284 | /* Set the mark field in CU and in every other compilation unit in the |
25285 | cache that we must keep because we are keeping CU. */ | |
25286 | ||
ae038cb0 DJ |
25287 | static void |
25288 | dwarf2_mark (struct dwarf2_cu *cu) | |
25289 | { | |
25290 | if (cu->mark) | |
25291 | return; | |
25292 | cu->mark = 1; | |
10b3939b DJ |
25293 | if (cu->dependencies != NULL) |
25294 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
25295 | } |
25296 | ||
25297 | static void | |
25298 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
25299 | { | |
25300 | while (per_cu) | |
25301 | { | |
25302 | per_cu->cu->mark = 0; | |
25303 | per_cu = per_cu->cu->read_in_chain; | |
25304 | } | |
72bf9492 DJ |
25305 | } |
25306 | ||
72bf9492 DJ |
25307 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
25308 | is its offset in .debug_info for this objfile. */ | |
25309 | ||
25310 | static hashval_t | |
25311 | partial_die_hash (const void *item) | |
25312 | { | |
9a3c8263 SM |
25313 | const struct partial_die_info *part_die |
25314 | = (const struct partial_die_info *) item; | |
9a619af0 | 25315 | |
9c541725 | 25316 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
25317 | } |
25318 | ||
25319 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
25320 | are equal if they have the same offset. */ | |
25321 | ||
25322 | static int | |
25323 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
25324 | { | |
9a3c8263 SM |
25325 | const struct partial_die_info *part_die_lhs |
25326 | = (const struct partial_die_info *) item_lhs; | |
25327 | const struct partial_die_info *part_die_rhs | |
25328 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 25329 | |
9c541725 | 25330 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
25331 | } |
25332 | ||
b4f54984 DE |
25333 | static struct cmd_list_element *set_dwarf_cmdlist; |
25334 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
25335 | |
25336 | static void | |
981a3fb3 | 25337 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 25338 | { |
b4f54984 | 25339 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 25340 | gdb_stdout); |
ae038cb0 DJ |
25341 | } |
25342 | ||
25343 | static void | |
981a3fb3 | 25344 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 25345 | { |
b4f54984 | 25346 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
25347 | } |
25348 | ||
cd4fb1b2 | 25349 | int dwarf_always_disassemble; |
437afbb8 | 25350 | |
437afbb8 | 25351 | static void |
cd4fb1b2 SM |
25352 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
25353 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25354 | { |
cd4fb1b2 SM |
25355 | fprintf_filtered (file, |
25356 | _("Whether to always disassemble " | |
25357 | "DWARF expressions is %s.\n"), | |
25358 | value); | |
9291a0cd TT |
25359 | } |
25360 | ||
9291a0cd | 25361 | static void |
cd4fb1b2 SM |
25362 | show_check_physname (struct ui_file *file, int from_tty, |
25363 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25364 | { |
cd4fb1b2 SM |
25365 | fprintf_filtered (file, |
25366 | _("Whether to check \"physname\" is %s.\n"), | |
25367 | value); | |
9291a0cd TT |
25368 | } |
25369 | ||
cd4fb1b2 SM |
25370 | void |
25371 | _initialize_dwarf2_read (void) | |
9291a0cd | 25372 | { |
d95d3aef TT |
25373 | dwarf2_objfile_data_key |
25374 | = register_objfile_data_with_cleanup (nullptr, dwarf2_free_objfile); | |
156942c7 | 25375 | |
cd4fb1b2 SM |
25376 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
25377 | Set DWARF specific variables.\n\ | |
25378 | Configure DWARF variables such as the cache size"), | |
25379 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
25380 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 25381 | |
cd4fb1b2 SM |
25382 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
25383 | Show DWARF specific variables\n\ | |
25384 | Show DWARF variables such as the cache size"), | |
25385 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
25386 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 25387 | |
cd4fb1b2 SM |
25388 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
25389 | &dwarf_max_cache_age, _("\ | |
25390 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
25391 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
25392 | A higher limit means that cached compilation units will be stored\n\ | |
25393 | in memory longer, and more total memory will be used. Zero disables\n\ | |
25394 | caching, which can slow down startup."), | |
25395 | NULL, | |
25396 | show_dwarf_max_cache_age, | |
25397 | &set_dwarf_cmdlist, | |
25398 | &show_dwarf_cmdlist); | |
156942c7 | 25399 | |
cd4fb1b2 SM |
25400 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
25401 | &dwarf_always_disassemble, _("\ | |
25402 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
25403 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
25404 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
25405 | syntax. When disabled, expressions will be printed in a more\n\ | |
25406 | conversational style, when possible."), | |
25407 | NULL, | |
25408 | show_dwarf_always_disassemble, | |
25409 | &set_dwarf_cmdlist, | |
25410 | &show_dwarf_cmdlist); | |
9291a0cd | 25411 | |
cd4fb1b2 SM |
25412 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
25413 | Set debugging of the DWARF reader."), _("\ | |
25414 | Show debugging of the DWARF reader."), _("\ | |
25415 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
25416 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
25417 | information. A value greater than 1 provides more verbose information."), | |
25418 | NULL, | |
25419 | NULL, | |
25420 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25421 | |
cd4fb1b2 SM |
25422 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
25423 | Set debugging of the DWARF DIE reader."), _("\ | |
25424 | Show debugging of the DWARF DIE reader."), _("\ | |
25425 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
25426 | The value is the maximum depth to print."), | |
25427 | NULL, | |
25428 | NULL, | |
25429 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25430 | |
cd4fb1b2 SM |
25431 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
25432 | Set debugging of the dwarf line reader."), _("\ | |
25433 | Show debugging of the dwarf line reader."), _("\ | |
25434 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
25435 | A value of 1 (one) provides basic information.\n\ | |
25436 | A value greater than 1 provides more verbose information."), | |
25437 | NULL, | |
25438 | NULL, | |
25439 | &setdebuglist, &showdebuglist); | |
437afbb8 | 25440 | |
cd4fb1b2 SM |
25441 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
25442 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
25443 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
25444 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
25445 | the demangler."), | |
25446 | NULL, show_check_physname, | |
25447 | &setdebuglist, &showdebuglist); | |
900e11f9 | 25448 | |
e615022a DE |
25449 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
25450 | no_class, &use_deprecated_index_sections, _("\ | |
25451 | Set whether to use deprecated gdb_index sections."), _("\ | |
25452 | Show whether to use deprecated gdb_index sections."), _("\ | |
25453 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
25454 | Normally they are ignored either because of a missing feature or\n\ | |
25455 | performance issue.\n\ | |
25456 | Warning: This option must be enabled before gdb reads the file."), | |
25457 | NULL, | |
25458 | NULL, | |
25459 | &setlist, &showlist); | |
25460 | ||
f1e6e072 TT |
25461 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
25462 | &dwarf2_locexpr_funcs); | |
25463 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25464 | &dwarf2_loclist_funcs); | |
25465 | ||
25466 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25467 | &dwarf2_block_frame_base_locexpr_funcs); | |
25468 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25469 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
25470 | |
25471 | #if GDB_SELF_TEST | |
25472 | selftests::register_test ("dw2_expand_symtabs_matching", | |
25473 | selftests::dw2_expand_symtabs_matching::run_test); | |
25474 | #endif | |
6502dd73 | 25475 | } |